CN110356458B - Brake mechanism and handcart comprising same - Google Patents
Brake mechanism and handcart comprising same Download PDFInfo
- Publication number
- CN110356458B CN110356458B CN201910757969.6A CN201910757969A CN110356458B CN 110356458 B CN110356458 B CN 110356458B CN 201910757969 A CN201910757969 A CN 201910757969A CN 110356458 B CN110356458 B CN 110356458B
- Authority
- CN
- China
- Prior art keywords
- directional wheel
- braking
- wheel set
- brake
- directional
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 96
- 230000004888 barrier function Effects 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 4
- 238000000034 method Methods 0.000 description 23
- 230000008569 process Effects 0.000 description 22
- 238000005096 rolling process Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
- B62B3/14—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor characterised by provisions for nesting or stacking, e.g. shopping trolleys
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B5/00—Accessories or details specially adapted for hand carts
- B62B5/04—Braking mechanisms; Locking devices against movement
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Handcart (AREA)
Abstract
The invention provides a braking mechanism and a trolley comprising the same, wherein a motor in the braking mechanism is fixedly connected with a gear; a first sliding track is arranged on one side of the transverse section of the first connecting rod, which faces the gear, a second sliding track is arranged on one side of the transverse section of the second connecting rod, which faces the gear, a first brake rod is inserted into the first sliding track, a second brake rod is inserted into the second sliding track, a toothed structure meshed with the gear is arranged on one side of the first brake rod, which faces the gear, and a toothed structure meshed with the gear is arranged on one side of the second brake rod, which faces the gear; the motor drives the gear to rotate, so that the first brake rod is driven to move left and right transversely, and the second brake rod is driven to move left and right transversely.
Description
Technical Field
The invention belongs to the field of trolleys, and particularly relates to a braking mechanism and a trolley comprising the same.
Background
Carts are a common tool in everyday life and typically include supermarket carts and airport luggage carts. In the prior art, the trolley is pushed based on manual control, and in order to ensure the safety in the pushing process, a braking mechanism is further arranged on some trolleys, for example, a pressing connecting rod is arranged on an airport luggage trolley, and the braking mechanism is released to brake by manually pressing the pressing connecting rod. However, the present hand trucks are provided with a brake mechanism only for stopping the hand truck. In stopping the trolley, research and development personnel consider various scenes, for example, in patent application number 201811238962.5, an automatic trolley braking method and system are disclosed, and the patent can control the automatic trolley braking when a user loses hands to loosen the trolley, so that potential safety hazards of sliding on an inclined downhill slope when the trolley is in an unmanned and restrained state are avoided. In addition, in patent application number 201610714528.4, a new cart brake system is disclosed in which a pressure sensor is provided for determining whether a user is holding a cart and braking is performed when the user is not holding the cart. It follows that either of the two patents only considers the safety problem in the braking process, but only uses the braking mechanism to brake, and does not consider the safety problem which can occur when pushing the trolley on a sloping downhill slope. In addition, the conventional brake mechanism has a wired caliper brake device and a caliper brake device, but these brake devices either require manual operation or have a relatively complex structure, for example, hydraulic oil, a brake pump, a brake pad, etc. are required for the caliper brake device, which clearly increases the overall weight of the trolley and affects the normal use of the trolley.
Disclosure of Invention
The invention provides a handcart, which solves the problems of safety when pushing the handcart on a slope and the increase of the whole weight of the handcart due to the too heavy brake mechanism when braking the handcart.
According to a first aspect of an embodiment of the present invention, there is provided a brake mechanism located between a left and a right set of directional wheels arranged side by side, each of the sets of directional wheels comprising a plurality of directional wheels rolling independently of each other and arranged side by side, for each directional wheel comprising a tyre and a hub for supporting the tyre inner profile, the hub having spokes arranged inside; the brake mechanism comprises a motor, a gear, a first brake rod, a second brake rod, a first connecting rod, a second connecting rod and a base, wherein the motor is fixed on the lower surface of the base and is fixedly connected with the gear, and the motor drives the gear to rotate; the first connecting rod and the second connecting rod are composed of vertical sections and transverse sections which are connected with each other, the top ends of the vertical sections of the first connecting rod and the second connecting rod are fixed on the lower surface of the base, a first sliding track is arranged on one side, facing the gear, of the transverse section of the first connecting rod, a second sliding track is arranged on one side, facing the gear, of the transverse section of the second connecting rod, a first braking rod is inserted into the first sliding track from one end of the transverse section of the first connecting rod, a second braking rod is inserted into the second sliding track from one end of the transverse section of the second connecting rod, a toothed structure meshed with the gear is arranged on one side, facing the gear, of the first braking rod, and a toothed structure meshed with the gear is arranged on one side, facing the gear, of the second braking rod; the motor drives the gear to rotate, so that the first brake rod is driven to transversely move left and right along the first sliding rail, and meanwhile, the second brake rod is driven to transversely move right and left along the second sliding rail;
when the braking force of the braking mechanism is controlled to be increased by one level, and thus the motor rotates by a corresponding angle, the gear drives the first braking rod and the second braking rod to move towards the left and the right by a corresponding distance respectively, so that the first braking rod is inserted between spokes of left directional wheels of leftmost braked directional wheels in the left directional wheel set, and the second braking rod is inserted between spokes of right directional wheels of rightmost braked directional wheels in the right directional wheel set, and the braking of the same number of directional wheels in the left directional wheel set and the right directional wheel set is maintained.
In an alternative implementation manner, when the braking force of the braking mechanism is controlled to be reduced by one step, each time the motor rotates by a corresponding angle, the gear drives the first braking rod and the second braking rod to move towards the right and the left by corresponding distances respectively, so that the first braking rod is pulled away from spokes of the leftmost braked directional wheel in the left directional wheel set, and the second braking rod is pulled away from spokes of the rightmost braked directional wheel in the right directional wheel set, thereby maintaining the braking of the same number of directional wheels in the left directional wheel set and the right directional wheel set.
In a further alternative embodiment, for each of the left or right directional wheel sets, an angle sensor is provided on the directional wheel, which is connected to a control circuit, each for detecting the angle of rotation of the corresponding directional wheel and for transmitting the angle of rotation to the control circuit, which is also connected to the motor.
In another alternative implementation manner, when the braking force of the braking mechanism is controlled to be increased by one level, the braking force of the braking mechanism is respectively increased, so that the i directional wheel close to the motor in the left directional wheel set and the right directional wheel set is braked, the control circuit judges whether the first braking rod and the second braking rod are correspondingly aligned with the spoke space of the i directional wheel in the left directional wheel set and the spoke space of the i directional wheel in the right directional wheel set according to the angle information detected by the angle sensor arranged on the i directional wheel in the left directional wheel set or the right directional wheel set, if so, the motor is controlled to rotate by the corresponding angle, and the gear is driven to rotate, and simultaneously drives the first braking rod and the second braking rod to respectively move towards the left and the right by the corresponding distances, so that the first braking rod is inserted between the spoke space of the i directional wheel in the left directional wheel set and the spoke space of the i directional wheel in the right directional wheel set, and the braking directional wheels in the left directional wheel set and the right directional wheel set are increased to i, and the left directional wheel set and the right directional wheel set are respectively adjacent to the i directional wheel set and are respectively 0 to the i directional wheel set.
In another alternative implementation manner, when the braking force of the braking mechanism is controlled to be reduced by one step, and braking of the ith directional wheel close to the motor in the left directional wheel set and the right directional wheel set is canceled, the control circuit controls the motor to rotate by a corresponding angle so as to drive the gear to rotate, and the gear drives the first braking rod and the second braking rod to move towards right and left by a corresponding distance respectively while rotating, so that the first braking rod is pulled away from a spoke of the ith directional wheel in the left directional wheel set, and the second braking rod is pulled away from a spoke of the ith directional wheel in the right directional wheel set, so that the braking directional wheels in the left directional wheel set and the right directional wheel set are reduced to i-1, and the i is an integer greater than 0.
In another alternative implementation, for each directional wheel in the left or right directional wheel set, an angular velocity sensor connected to the control circuit is disposed on the directional wheel, each angular velocity sensor is used for detecting an angular velocity of the corresponding directional wheel and transmitting the angular velocity to the control circuit, and when braking the i directional wheel in the left or right directional wheel set, the control circuit adjusts the rotation speed of the motor according to the angular velocity detected by the angular velocity sensor on the i directional wheel in the left or right directional wheel set, so that the first brake lever is inserted between spokes of the i directional wheel in the left directional wheel set in time after aligning the spokes of the i directional wheel, and the second brake lever is inserted between spokes of the i directional wheel in the right directional wheel set in time after aligning the spokes of the i directional wheel.
In another alternative implementation, the motor, gear, first connecting rod and second connecting rod are located between the left and right directional wheelsets; the left directional wheel set and the right directional wheel set are fixed on the lower surface of the base.
The invention also provides a handcart comprising the brake mechanism, which comprises a frame body for carrying goods, wheels, a hand lever, a first support frame for connecting the frame body with the wheels, and a second support frame for connecting the frame body with the hand lever, wherein the wheels comprise front wheels and rear wheels, the front wheels are correspondingly provided with the brake mechanism, the left front wheels are left directional wheel groups, the right front wheels are right directional wheel groups, one side, facing a user, of the hand lever is provided with a first pressure sensor, the upper surface of the hand lever is provided with a second pressure sensor, a front side baffle plate of the frame body is provided with a third pressure sensor, the handcart is also provided with a level sensor, the first pressure sensor, the second pressure sensor, the third pressure sensor and the brake mechanism are respectively connected with a control circuit, the level sensor is used for detecting the inclined state of the handcart, the first pressure sensor is used for detecting the thrust of the handcart, the second pressure sensor is used for detecting whether the user holds the hand lever, and the second pressure sensor is used for detecting whether the hand lever holds the object in the front side baffle plate is held by the hand;
And when the horizontal sensor detects that the handcart is inclined, and the third pressure sensor detects that the pressure applied by the object in the frame body on the front side baffle plate is increased, the control circuit determines that the handcart descends along a slope, judges whether the second pressure sensor detects the pressure at the moment, if so, determines that a user holds the hand lever, controls the braking mechanism to brake step by step until the braking mechanism is completely braked, and then determines that the user pushes the handcart when the first pressure sensor detects the pressure, and controls the braking force of the braking mechanism to descend by one step at the moment.
In an optional implementation manner, a fourth pressure sensor is arranged on one side, away from the user, of the hand rest rod, the fourth pressure sensor is used for detecting the pulling force of the user on the hand rest rod, the control circuit judges whether the pulling force is detected by the fourth pressure sensor in real time after controlling the braking force of the braking mechanism to be reduced by one step, if so, the user is determined to pull the handcart, and at the moment, the braking force of the braking mechanism is controlled to be increased by one step;
If the fourth pressure sensor does not detect the tensile force, further judging whether the pressure detected by the first pressure sensor becomes zero within a first preset time, if so, judging whether the pressure is detected again by the first pressure sensor in real time, and controlling the braking force of the braking mechanism to be reduced by one step again when the pressure is detected again by the first pressure sensor; otherwise, starting from the first preset time after the first pressure sensor detects the pressure, timing until the timing exceeds the second preset time, and controlling the braking force of the braking mechanism to be reduced by one step.
The beneficial effects of the invention are as follows:
1. The brake mechanism is simple and portable in structure, and the brake force is increased step by step and lowered step by step, so that the whole weight of the handcart is not greatly improved, and the normal use of the handcart is ensured;
2. According to the invention, in the process of transferring the trolley from the flat ground to the inclined downhill, the braking mechanism of the front wheel of the trolley is controlled to brake step by step until the trolley is braked completely, so that the trolley can be stably transferred from the flat ground to the inclined downhill without stopping, and the safety is higher; by detecting push-pull operation of the hand lever, a user can push-pull operation of the handcart on a slope according to the actual situation of the user, and the handcart is automatically controlled to brake to a corresponding degree according to the push-pull operation, so that the handcart can descend at any allowable speed, and the user can not topple forward due to overlarge descending speed of the handcart in the descending process of the handcart, so that the time for pushing the handcart to pass through the slope by the user can be reduced, and the safety of pushing the handcart to pass through the slope by the user is ensured;
3. The invention considers two pushing modes possibly existing in the process of pushing the handcart by a user, directly controls the descending level of the braking force of the braking mechanism according to the pushing times aiming at the mode of controlling the descending speed of the handcart by pushing the handcart according to times, and controls the descending level of the braking force of the braking mechanism by setting the second preset time aiming at the mode of continuously pushing the handcart, thereby meeting the requirement of the user for rapidly improving the descending speed of the handcart, and the user can not need to laboriously push the handcart after the descending speed is improved.
Drawings
FIG. 1 is a schematic view of an embodiment of a brake mechanism of the present invention;
FIG. 2 is a schematic side elevational view of the orientation wheel of FIG. 1;
FIG. 3 is a top plan view of the brake mechanism of FIG. 1;
FIG. 4 is a schematic view of an embodiment of the cart of the present invention;
FIG. 5 is a left side view of FIG. 4;
fig. 6 is a circuit block diagram of one embodiment of the cart of the present invention.
Detailed Description
In order to better understand the technical solution in the embodiments of the present invention and make the above objects, features and advantages of the embodiments of the present invention more comprehensible, the technical solution in the embodiments of the present invention is described in further detail below with reference to the accompanying drawings.
In the description of the present invention, unless otherwise specified and defined, it should be noted that the term "connected" should be interpreted broadly, and for example, it may be a mechanical connection or an electrical connection, or may be a connection between two elements, or may be a direct connection or may be an indirect connection through an intermediary, and it will be understood to those skilled in the art that the specific meaning of the term may be interpreted according to the specific circumstances.
Traditional brake mechanisms have wired caliper brake devices and caliper brake devices, but these brake devices either require manual operation or are relatively complex in structure, such as hydraulic oil, a brake pump, brake pads, etc. are required for the caliper brake devices, which clearly increases the overall weight of the trolley and can affect the normal use of the trolley. Therefore, the invention designs a novel braking mechanism aiming at the non-motorized handcart, the braking mechanism has simple and portable structure, and the whole weight of the handcart can not be greatly improved while the braking force is gradually increased and gradually reduced, so that the normal use of the handcart is ensured. The brake mechanism is shown in fig. 1, and is located between a left directional wheel set 100 and a right directional wheel set 200 which are arranged side by side, wherein each of the left directional wheel set 100 and the right directional wheel set 200 comprises a plurality of directional wheels which roll independently and are arranged side by side, and for each directional wheel, as shown in connection with fig. 2, each of the directional wheels comprises a tire 101 and a hub 102 for supporting the inner contour of the tire 101, and spokes 103 are arranged inside the hub; as shown in fig. 3, the braking mechanism includes a motor 301, a gear 302, a first brake lever 306, a second brake lever 307, a first connecting lever 304, a second connecting lever 305, and a base 308, wherein the motor 301 is fixed on the lower surface of the base 308 and is fixedly connected with the gear 302.
The motor 301 drives the gear 302 to rotate; the first connecting rod 304 and the second connecting rod 305 are composed of vertical sections and transverse sections which are connected with each other, the top ends of the vertical sections of the first connecting rod 304 and the second connecting rod 305 are fixed on the lower surface of the base 308, a first sliding track is arranged on one side of the transverse section of the first connecting rod 304 facing the gear 302, a second sliding track is arranged on one side of the transverse section of the second connecting rod 305 facing the gear 303, a first braking rod 306 is inserted into the first sliding track from one end of the transverse section of the first connecting rod 304, a second braking rod 307 is inserted into the second sliding track from one end of the transverse section of the second connecting rod 305, a toothed structure meshed with the gear 302 is arranged on one side of the first braking rod 306 facing the gear 302, and a toothed structure meshed with the gear 302 is arranged on one side of the second braking rod 307 facing the gear 302; the motor 301 drives the gear 302 to rotate, so as to drive the first brake lever 306 to move laterally left and right along the first sliding track, and drive the second brake lever 307 to move laterally right and left along the second sliding track; when the braking force of the braking mechanism is controlled to be increased by one step, so as to perform progressive braking, each time the motor 301 rotates by a corresponding angle, the gear 302 drives the first braking lever 306 and the second braking lever 307 to move towards the left and right by a corresponding distance, so that the first braking lever 306 is inserted between spokes of the left directional wheel of the leftmost braked directional wheel in the left directional wheel set 100, and the second braking lever 307 is inserted between spokes of the right directional wheel of the rightmost braked directional wheel in the right directional wheel set 200, thereby maintaining the braking of the same number of directional wheels in the left directional wheel set 100 and the right directional wheel set 200.
When the braking force of the braking mechanism is controlled to be reduced by one step, each time the motor 301 rotates by a corresponding angle, the gear 302 drives the first braking lever 306 and the second braking lever 307 to move towards the right and left by corresponding distances respectively, so that the first braking lever 306 is pulled away from the spoke of the leftmost braked directional wheel in the left directional wheel set 100, and the second braking lever 307 is pulled away from the spoke of the rightmost braked directional wheel in the right directional wheel set 200, thereby maintaining the braking of the same number of directional wheels in the left directional wheel set 100 and the right directional wheel set 200.
Because the corresponding brake rod may be in a rolling state when being inserted between the spokes of the corresponding directional wheel, the corresponding brake rod may collide with the spokes of the corresponding directional wheel during the insertion process, so that the corresponding brake rod cannot be accurately inserted between the spokes of the corresponding directional wheel at one time. For this purpose, the invention provides an angle sensor on each of the left or right directional wheel sets, which is connected to a control circuit, each for detecting the rotation angle of the corresponding directional wheel and transmitting the rotation angle to the control circuit, which is also connected to the motor. When the braking force of the braking mechanism is controlled to be increased by one level, the control circuit respectively enables the ith directional wheel close to the motor in the left directional wheel set and the right directional wheel set to brake, judges whether the first braking rod and the second braking rod are correspondingly aligned with the spoke of the ith directional wheel in the left directional wheel set and the spoke of the ith directional wheel in the right directional wheel set according to the angle information detected by the angle sensor arranged on the ith directional wheel in the left directional wheel set or the right directional wheel set, if so, the motor is controlled to rotate by a corresponding angle, so that the gear is driven to rotate, and the gear is driven to respectively move corresponding distances towards the left and the right while rotating, so that the first braking rod is inserted between the spoke of the ith directional wheel in the left directional wheel set and the spoke of the ith directional wheel in the right directional wheel set, and the braking rod in the left directional wheel set is increased to i, so that the i adjacent to the motor in the left directional wheel set and the right directional wheel set are respectively braked to be more than 0. In addition, when the braking force of the braking mechanism is controlled to be reduced by one step, the braking force of the i directional wheel close to the motor in the left directional wheel set and the right directional wheel set is respectively canceled, the control circuit controls the motor to rotate by a corresponding angle so as to drive the gear to rotate, the gear drives the first braking rod and the second braking rod to respectively move towards the right and the left by a corresponding distance while rotating, so that the first braking rod is separated from the spoke of the i directional wheel in the left directional wheel set, and the second braking rod is separated from the spoke of the i directional wheel in the right directional wheel set, thereby reducing the braking directional wheels in the left directional wheel set and the right directional wheel set to i-1, and keeping the i-1 directional wheels close to the motor in the left directional wheel set and the right directional wheel set braked.
Although the invention can determine whether the corresponding brake lever is aligned with the spokes on the corresponding directional wheel by arranging the angle sensor, the directional wheel is still in a rolling state after alignment, if the rotation speed of the motor is too slow at this time, the moving speed of the corresponding brake lever is slower, and when the rolling speed of the directional wheel is faster, it is possible that the brake lever is not aligned with the spokes of the directional wheel any more when the brake lever moves to the directional wheel, but aligned with the spokes of the directional wheel. In order to further ensure that the brake lever is accurately inserted between spokes of the corresponding directional wheel, the invention aims at each directional wheel in the left directional wheel set or the right directional wheel set, the directional wheels are provided with angular velocity sensors connected with the control circuit, and each angular velocity sensor is used for detecting the angular velocity of the corresponding directional wheel and transmitting the angular velocity to the control circuit. When the control circuit brakes the ith directional wheel close to the motor in the left directional wheel set and the right directional wheel set, according to the angular speed detected by the angular speed sensor on the ith directional wheel in the left directional wheel set or the right directional wheel set, the rotation speed of the motor is adjusted, so that the first brake rod is timely inserted between spokes of the ith directional wheel in the left directional wheel set after being aligned with the spokes, and the second brake rod is timely inserted between spokes of the ith directional wheel in the right directional wheel set after being aligned with the spokes.
In this embodiment, the motor, the gear, the first connecting rod and the second connecting rod are located between the left directional wheel set and the right directional wheel set. The left directional wheel set and the right directional wheel set are fixed on the lower surface of the base and are symmetrically arranged left and right. The length of the first brake rod is greater than or equal to the length of the transverse section of the first connecting rod, and the length of the second brake rod is greater than or equal to the length of the transverse section of the first connecting rod. The rotation axes of each orientation wheel are positioned on the same horizontal line.
The embodiment shows that the braking mechanism is simple and portable in structure, and the braking force is increased step by step and lowered step by step, so that the whole weight of the handcart is not greatly improved, and the normal use of the handcart is ensured. The invention is particularly applicable to non-motorized carts. In the braking mechanism, the left directional wheel set is the left front wheel of the handcart, and the right directional wheel set is the right front wheel of the handcart.
At present, when a user pushes a trolley to go up and down a slope, the user usually stops to stabilize the trolley after the user reaches the slope, aiming at the slope without a diagonal elevator, the user usually takes special care when pushing the trolley to go down the slope, and the user needs to move the footsteps while pulling the trolley, so that the safety of the user in descending is difficult to be ensured, and the moving speed of the user when pushing the trolley to go up and down the slope is greatly limited. Therefore, the handcart provided by the invention can be pushed and pulled by a user on a slope according to the actual situation of the handcart, and the handcart is automatically controlled to brake to a corresponding degree according to the push-pull operation, so that the handcart can descend at any allowable speed.
Referring to fig. 4, a schematic structural diagram of a cart according to an embodiment of the present invention is shown. As shown in connection with fig. 5, the cart may comprise a frame 1 for carrying goods, wheels 2, a grab rail 3, a first support 5 for connecting the frame 1 with the wheels 2, and a second support 4 for connecting the frame 1 with the grab rail 3, the wheels 2 comprise front wheels 21 and rear wheels 22, the front wheels 21 are correspondingly provided with brake mechanisms (not shown in fig. 4), a side of the grab rail 3 facing the user is provided with a first pressure sensor 31, the upper surface of the grab rail 3 is provided with a second pressure sensor 32, a front side baffle of the frame 1 is provided with a third pressure sensor 11, the cart is further provided with a level sensor 6, the first pressure sensor 31, the second pressure sensor 32, the third pressure sensor 11 and the brake mechanisms are respectively connected with a control circuit (not shown in fig. 4), the level sensor 6 is used for detecting the inclination of the cart, the first pressure sensor 31 is used for detecting whether the pushing force of the cart is applied to the first pressure sensor 32, and the second pressure sensor is used for detecting whether the user holds the pressure sensor 11 in the grab rail 1.
Since the trolley is tilted when it is travelling on a slope, whether it is ascending or descending, it is clearly not accurate to determine whether the trolley is descending only from whether the level sensor detects that the trolley is tilted. While the trolley is descending, the articles in the frame body of the trolley are usually moved to the front baffle plate side of the trolley frame body, so that the pressure applied on the front baffle plate is increased, and therefore, the third pressure sensor is arranged on the front baffle plate of the frame body, and when the trolley is descending, the pressure applied on the front baffle plate of the trolley by the articles in the frame body 1 is increased. The control circuit of the invention determines that the trolley is descending along a slope when the level sensor 6 detects that the trolley is inclined and thereafter the third pressure sensor 11 detects that the pressure of the articles in the frame 1 on the front side barrier is increased.
At present, a user usually stops when pushing the trolley to move down a slope, the user carefully pushes the trolley to move onto the slope, a pause exists in the process that the user pushes the trolley to move from the flat ground to the slope, the pause cannot be continuously performed, and before the user pushes the trolley onto the slope from the flat ground, if the pushing speed of the trolley on the flat ground is higher, the user is likely to rapidly increase the speed after the trolley moves onto the slope due to untimely braking, the upper half of the user moves forwards under the driving of the trolley, and the lower half of the user cannot catch up with the downslope of the trolley, so that the whole body of the user is inclined forwards, and the user can be seriously inclined forwards. As can be seen, the user has the problem of inconsistent pushing process and lower safety in pushing the conventional trolley from flat ground to inclined downhill. Therefore, when the handcart is determined to descend along a slope according to signals detected by the horizontal sensor and the third pressure sensor, the control circuit judges whether the second pressure sensor detects pressure, if so, the control circuit indicates that a user holds the hand lever, and the control circuit controls the braking mechanism to brake step by step. In the process of transferring the handcart from the flat ground to the inclined downhill, if the braking mechanism is directly and completely braked, the speed of the handcart is sharply reduced, the upper half of the user can stop under the driving of the handcart, and the lower half of the user still moves at the previous speed, so that the whole body of the user is inclined backwards, and the user can be seriously inclined backwards. In the process of transferring the handcart from the flat ground to the inclined downhill, the handcart is braked step by the brake mechanism behind the handcart until the brake mechanism is completely braked, the condition that the speed of the handcart is suddenly increased or suddenly reduced due to emergency braking can be avoided in the process, the speed of the handcart is gradually changed, and a user can gradually adapt to the change in the process, so that no matter how big the speed of the handcart is pushed by the user on the flat ground in the process of transferring the handcart from the flat ground to the inclined downhill, the user can not stop, and the user toppling caused by the asynchronism of the upper half and the lower half of the user can be avoided in the process of transferring the handcart from the flat ground to the inclined downhill, namely, the handcart can realize the non-stop stable transfer of the handcart from the flat ground to the inclined downhill and has higher safety.
When the user completely transfers the handcart to the inclined downhill, the handcart has a descending trend under the action of the gravity of the handcart and the gravity of articles in the frame body of the handcart, and at the moment, the user performs push-pull operation on the hand lever, so that the handcart can be freely controlled to move according to the speed required by the user. After the trolley is completely moved to a slope and the braking mechanism is completely braked, a user can control the trolley to move downwards by pushing the walking rod, a first pressure sensor arranged on the side, facing the user, of the walking rod detects pressure, and the control circuit determines that the user pushes the trolley when the first pressure sensor detects the pressure, and controls the braking force of the braking mechanism to be reduced by one step (for example, the braking force is 100% when the braking mechanism is completely braked, the braking force is 80% after the braking force is reduced by one step, and the like).
As the speed of the handcart gradually increases in the descending process, after the braking force of the braking mechanism decreases by one step, if a user feels that the descending speed of the handcart is too high in the descending process, the user can quickly catch up with the descending rhythm of the handcart, and then the handcart can be decelerated by pulling the handcart backwards. Correspondingly, in order to detect the action of pulling the handcart by the user, a fourth pressure sensor is arranged on one side, away from the user, of the hand lever, the fourth pressure sensor is used for detecting the pulling force of the user on the handcart, the control circuit judges whether the pulling force is detected by the fourth pressure sensor after controlling the braking force of the braking mechanism to be reduced by one level, if so, the user is determined to pull the handcart, and the braking force of the braking mechanism is controlled to be increased by one level at the moment.
In addition, after the braking force of the braking mechanism is reduced by one step, if the user feels that the descending speed of the trolley is too small in the descending process, the user can further push the hand lever to control the braking force of the braking mechanism to be reduced by one step. When pushing the hand lever, a user can have two operation modes, one is to loosen hands after pushing the handcart once, and push the handcart once again when the descending speed is required to be increased; the other is that the user continues to push the cart, providing a continuous push to the cart during the descent. Since the trolley is gradually increasing in speed during the descent, if the user provides a constant pushing force to the trolley, the descent speed of the trolley will be further increased. When the user pushes the hand lever in one way, the number of the brake force descending steps of the brake mechanism can be determined directly according to the number of times the user pushes the trolley, but if the user pushes the hand lever in the second way, the number of the brake force descending steps is still determined according to the number of pushing times, which is obviously not realistic. Therefore, when judging whether the fourth pressure sensor detects the tensile force, if the fourth pressure sensor does not detect the tensile force, the control circuit further judges whether the pressure detected by the first pressure sensor becomes zero within a first preset time, if so, judges whether the pressure is detected again by the first pressure sensor in real time, and when the pressure is detected again by the first pressure sensor, the braking force of the braking mechanism is controlled to be reduced by one step; otherwise, starting from the first preset time after the first pressure sensor detects the pressure, timing until the timing exceeds the second preset time, and controlling the braking force of the braking mechanism to be reduced by one step. The invention considers two pushing modes possibly existing in the process of pushing the handcart by a user, directly controls the descending level of the braking force of the braking mechanism according to the pushing times aiming at the mode of controlling the descending speed of the handcart by pushing the handcart according to times, and controls the descending level of the braking force of the braking mechanism by setting the second preset time aiming at the mode of continuously pushing the handcart, thereby meeting the requirement of the user for rapidly improving the descending speed of the handcart, and the user can not need to laboriously push the handcart after the descending speed is improved.
Of course, in order to further ensure the safety of pushing the handcart by the user on the inclined downhill slope, the front wheel is further provided with an angular velocity sensor connected with the control circuit, and the control circuit is used for judging whether the angular velocity detected by the angular velocity sensor exceeds a preset angular velocity, if so, determining that the downward velocity of the handcart is too fast, and controlling the braking mechanism to brake step by step until the angular velocity detected by the angular velocity sensor is smaller than the preset angular velocity. When the user pushes the cart up the incline, the level sensor detects that the cart is no longer inclined, and when the user pushes the cart up the incline, the level sensor detects that the cart is inclined, and after detecting that the cart is inclined, the third pressure sensor detects that the pressure exerted on the front side baffle by the articles in the frame body is not increased. In order to ensure normal pushing of the trolley on level ground and inclined uphill, the control circuit controls to cancel braking of the stages of the braking mechanism when the level sensor detects that the trolley is not inclined and the level sensor detects that the trolley is inclined, but thereafter the third pressure sensor detects that the pressure exerted by the articles in the frame on the front side barrier is not increased.
In this embodiment, since the conventional cart (e.g., shopping cart, etc.) has a frame, wheels, a hand lever, a first support for connecting the frame and the wheels, and a second support for connecting the frame and the hand lever, these structures are not described in any way. After the user places the article in the frame, the user holds and pushes the hand bar to rotate the wheels, so that the whole handcart is driven to push forwards. The front wheel and the rear wheel can both comprise a left wheel and a right wheel, the rear wheel can be universal wheels, the front wheel and the front wheel can be directional wheels, and the invention can drive the handcart to rotate towards any direction by using the universal wheels as the rear wheel and the directional wheels as the front wheel, and the labor is saved in the rotating process. Because the palm of the user applies pressure to the side of the hand lever facing the user when the user pushes the hand lever, the invention sets the first pressure sensor on the side of the hand lever facing the user, and whether the user pushes the handcart is detected according to whether the first pressure sensor detects the pressure, and the detection of the pressure indicates that the user pushes the handcart. Because the palm of the user is normally put on the upper side of the hand rest when the user holds the hand rest, the invention sets the second pressure sensor on the upper side of the hand rest, and whether the user holds the hand rest is detected according to whether the second pressure sensor detects pressure, and the user holds the hand rest when the pressure is detected. Because the articles in the frame body can move forwards when the handcart moves to the inclined downhill so as to press the front baffle plate of the frame body, the invention arranges a third pressure sensor on the front baffle plate of the frame body, and when the handcart inclines, if the pressure detected by the third pressure sensor increases, the handcart moves to the inclined downhill. The level sensor is a device capable of detecting the levelness of the handcart in the prior art, and the detection of the levelness belongs to the prior art and is not described herein. As for the setting position of the level sensor, the level sensor may be set at or near the center of gravity of the cart, wherein when the level sensor detects the inclination angle, it indicates that the cart is inclined, and when the inclination angle is not detected, it indicates that the cart is not inclined.
According to the embodiment, in the process of transferring the trolley from the flat ground to the inclined downhill, the braking mechanism of the front wheel of the trolley is controlled to brake step by step until the trolley is braked completely, so that the trolley can be stably transferred from the flat ground to the inclined downhill without stopping, and the safety is higher; by detecting push-pull operation of the hand lever, a user can push-pull operation of the handcart on a slope according to the actual situation of the user, and the handcart is automatically controlled to brake to a corresponding degree according to the push-pull operation, so that the handcart can descend at any allowable speed, and the user can not topple forward due to overlarge descending speed of the handcart in the descending process of the handcart, so that the time for pushing the handcart to pass through the slope by the user can be reduced, and the safety of pushing the handcart to pass through the slope by the user is ensured.
In combination with fig. 6, the control circuit of the present invention may include a controller, a first comparator, a first delay, a first timer, a second timer, and a second comparator, where the output end of the level sensor is connected to the first input end of the controller, the output end of the third pressure sensor is connected to the first input end of the first comparator and the second input end of the first comparator through the first delay, the output end of the first comparator is connected to the second input end of the controller, the output end of the second pressure sensor is connected to the third input end of the controller, the output end of the first pressure sensor is connected to the fourth input end of the controller, the third output end of the controller is connected to the input end of the first timer, the output end of the first timer is connected to the fifth input end of the controller, the output end of the fourth pressure sensor is connected to the sixth input end of the controller, the first output end of the controller is connected to the second input end of the second comparator, the output end of the second pressure sensor is connected to the eighth input end of the controller, and the output end of the eighth pressure sensor is connected to the output end of the controller.
In this embodiment, the level sensor sends the detected inclination angle to the first input end of the controller, the controller determines that the cart is inclined after receiving the inclination angle, and then determines whether the second input end of the controller receives a corresponding signal, wherein the first comparator compares the pressures acquired by the third pressure sensor before and after the second pressure sensor, if the pressures acquired by the third pressure sensor before and after the second pressure sensor are gradually increased, the second input end of the controller receives the corresponding signal, and determines that the pressure of the object in the frame body applied to the front baffle is increased after the cart is inclined, so as to determine that the cart descends along a slope; after that, the controller firstly detects whether the third input end of the controller receives a pressure signal, if so, the controller determines that the user holds the hand lever, and controls the brake mechanism to brake step by step through the second output end of the controller until the brake mechanism brakes completely; and judging whether the fourth input end of the hand cart receives a pressure signal, if so, determining that the user pushes the hand cart, and controlling the braking force of the braking mechanism to be reduced by one step through the second output end of the hand cart.
The controller judges whether a sixth input end of the controller receives a tension signal or not in real time after controlling the braking force of the braking mechanism to decline by one level, if the sixth input end receives the tension signal, the controller determines that a user pulls the trolley, and at the moment, the second output end controls the braking force of the braking mechanism to increase by one level; if the sixth input end does not receive the tension signal, the third output end controls the first timer to start timing, after timing reaches the first preset time, the first timer sends a first timing end signal to the fifth input end of the controller, the fifth input end of the controller judges whether the pressure signal received by the fourth input end is zero after receiving the first timing end signal, if so, the fourth input end of the controller judges whether the pressure signal is received again in real time, and when the fourth input end of the controller receives the pressure signal again, the braking force of the braking mechanism is controlled to be reduced by one step again; if the time is not zero, the first output end controls the second timer to start timing, after the timing reaches the second preset time, the second timer sends a second timing end signal to the eighth input end of the controller, and then the controller controls the braking force of the braking mechanism to be reduced by one step again through the second output end. In addition, the second comparator compares the angular velocity detected by the angular velocity sensor with a preset angular velocity, if the angular velocity exceeds the preset angular velocity, a first signal is sent to a ninth input end of the controller, otherwise, a second signal is sent to the ninth input end of the controller, and after the ninth input end of the controller receives the first signal, the braking mechanism is controlled to brake step by step until the angular velocity detected by the angular velocity sensor is smaller than the preset angular velocity.
It should be noted that: in general, it is not conceivable for a person skilled in the art to insert a brake lever between spokes of a wheel to brake a vehicle because the conventional vehicle is traveling at a high speed, the brake lever is difficult to align with and insert in time in the area between the spokes of the wheel, and a large force is required to withdraw the brake lever from between the spokes, but unlike the present invention in which a hand is used to hold the cart during the entire pushing process, the cart advances with the walking speed of a person, the speed of which is slow, and correspondingly the advancing speed of the wheel is slow, so that the brake lever is easier to align with and insert in time in the area between the spokes of the wheel, and in which a person pulls the cart backward while reducing the braking force, i.e., withdrawing the brake lever from between the spokes, so that a large force is not required to withdraw the brake lever from between the spokes.
Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.
It is to be understood that the invention is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the invention is to be governed only by the following claims.
Claims (7)
1. The brake mechanism is characterized in that the brake mechanism is positioned between a left directional wheel set and a right directional wheel set which are arranged side by side, each of the left directional wheel set and the right directional wheel set comprises a plurality of directional wheels which roll independently and are arranged side by side, each directional wheel comprises a tire and a hub for supporting the inner contour of the tire, and spokes are arranged in the hub; the brake mechanism comprises a motor, a gear, a first brake rod, a second brake rod, a first connecting rod, a second connecting rod and a base, wherein the motor is fixed on the lower surface of the base and is fixedly connected with the gear, and the motor drives the gear to rotate; the first connecting rod and the second connecting rod are composed of vertical sections and transverse sections which are connected with each other, the top ends of the vertical sections of the first connecting rod and the second connecting rod are fixed on the lower surface of the base, a first sliding track is arranged on one side, facing the gear, of the transverse section of the first connecting rod, a second sliding track is arranged on one side, facing the gear, of the transverse section of the second connecting rod, a first braking rod is inserted into the first sliding track from one end of the transverse section of the first connecting rod, a second braking rod is inserted into the second sliding track from one end of the transverse section of the second connecting rod, a toothed structure meshed with the gear is arranged on one side, facing the gear, of the first braking rod, and a toothed structure meshed with the gear is arranged on one side, facing the gear, of the second braking rod; the motor drives the gear to rotate, so that the first brake rod is driven to transversely move left and right along the first sliding rail, and meanwhile, the second brake rod is driven to transversely move right and left along the second sliding rail;
When the braking force of the braking mechanism is controlled to be increased by one level so as to perform step-by-step braking, each time the motor rotates by a corresponding angle, the gear drives the first braking rod and the second braking rod to move towards the left and the right by corresponding distances respectively, so that the first braking rod is inserted between spokes of left directional wheels of leftmost braked directional wheels in the left directional wheel set, and the second braking rod is inserted between spokes of right directional wheels of rightmost braked directional wheels in the right directional wheel set, thereby keeping the braking of the same number of directional wheels in the left directional wheel set and the right directional wheel set;
When the braking force of the braking mechanism is controlled to decline by one level, each time the motor rotates by a corresponding angle, the gear drives the first braking rod and the second braking rod to respectively move towards the right and the left by a corresponding distance, so that the first braking rod is separated from spokes of a leftmost braked directional wheel in the left directional wheel set, and the second braking rod is separated from spokes of a rightmost braked directional wheel in the right directional wheel set, thereby keeping the braking of the same number of directional wheels in the left directional wheel set and the right directional wheel set;
For each directional wheel in the left directional wheel set or the right directional wheel set, the directional wheels are provided with angle sensors connected with a control circuit, each angle sensor is used for detecting the rotation angle of the corresponding directional wheel and transmitting the rotation angle to the control circuit, and the control circuit is also connected with the motor.
2. The brake mechanism according to claim 1, wherein when the braking force of the brake mechanism is controlled to be increased by one step, the control circuit respectively causes the i-th directional wheel of the left directional wheel set and the right directional wheel set, which is close to the motor, to brake, the control circuit judges whether the first brake lever and the second brake lever are aligned with the spoke of the i-th directional wheel of the left directional wheel set and the spoke of the i-th directional wheel of the right directional wheel set according to the angle information detected by the angle sensor arranged on the i-th directional wheel of the left directional wheel set or the right directional wheel set, if so, the motor is controlled to rotate by the corresponding angle, thereby driving the gear to rotate, and simultaneously correspondingly driving the first brake lever and the second brake lever to respectively move towards the left and the right by the corresponding distances, so that the first brake lever is inserted between the spoke of the i-th directional wheel of the left directional wheel set and the second brake lever is inserted between the spoke of the i-th directional wheel of the right directional wheel set, thereby increasing the brake levers of the left directional wheel set and the right directional wheel set to i-th directional wheel set, and enabling the left directional wheel and the right directional wheel set to be respectively close to i-th directional wheel set to the i, and the motor to be respectively 0.
3. The brake mechanism of claim 1, wherein when the braking force of the brake mechanism is controlled to be reduced by one step, the control circuit controls the motor to rotate by a corresponding angle when braking is canceled on the ith directional wheel close to the motor in the left directional wheel set and the right directional wheel set respectively, so as to drive the gear to rotate, and the gear correspondingly drives the first brake rod and the second brake rod to move towards the right and left by a corresponding distance when rotating, so that the first brake rod is pulled away from the spoke of the ith directional wheel in the left directional wheel set, and the second brake rod is pulled away from the spoke of the ith directional wheel in the right directional wheel set, so that the braking directional wheels in the left directional wheel set and the right directional wheel set are reduced to i-1, and the i-1 directional wheels close to the motor in the left directional wheel set and the right directional wheel set are kept braked, wherein i is an integer greater than 0.
4. A brake mechanism according to claim 1, wherein for each of the left or right set of directional wheels, there is provided an angular velocity sensor connected to the control circuit, each of the angular velocity sensors being adapted to detect the angular velocity of the corresponding directional wheel and to transmit the angular velocity to the control circuit, when braking the i-th directional wheel of the left or right set of directional wheels adjacent to the motor, adjusting the rotational velocity of the motor in dependence on the angular velocity detected by the angular velocity sensor on the i-th directional wheel of the left or right set of directional wheels so that the first brake lever is inserted in time between the spokes of the i-th directional wheel of the left set of directional wheels after alignment, and so that the second brake lever is inserted in time between the spokes of the i-th directional wheel of the right set of directional wheels after alignment.
5. The brake mechanism of claim 1, wherein the motor, gear, first connecting rod and second connecting rod are located between the left and right directional wheelsets; the left directional wheel set and the right directional wheel set are fixed on the lower surface of the base.
6. A trolley comprising the brake mechanism as claimed in any one of claims 1 to 5, characterized by comprising a frame for carrying goods, wheels, a walking beam, a first support frame for connecting the frame to the wheels, and a second support frame for connecting the frame to the walking beam, the wheels comprising front wheels and rear wheels, the front wheels being correspondingly provided with the brake mechanism, the front left wheels being left-hand wheel sets, the front right wheels being right-hand wheel sets, a first pressure sensor being provided on the walking beam on the side facing the user, a second pressure sensor being provided on the upper surface of the walking beam, a third pressure sensor being provided on the front side barrier of the frame, the trolley being further provided with a level sensor, the first pressure sensor, the second pressure sensor, the third pressure sensor and the brake mechanism being connected to a control circuit, respectively, the level sensor being used for detecting the tilt status of the trolley, the first pressure sensor being used for detecting whether the user holds the walking beam, the second pressure sensor being used for detecting whether the user holds the pressure sensor on the front side barrier;
And when the horizontal sensor detects that the handcart is inclined, and the third pressure sensor detects that the pressure applied by the object in the frame body on the front side baffle plate is increased, the control circuit determines that the handcart descends along a slope, judges whether the second pressure sensor detects the pressure at the moment, if so, determines that a user holds the hand lever, controls the braking mechanism to brake step by step until the braking mechanism is completely braked, and then determines that the user pushes the handcart when the first pressure sensor detects the pressure, and controls the braking force of the braking mechanism to descend by one step at the moment.
7. The cart of claim 6, wherein a fourth pressure sensor is disposed on a side of the hand rest facing away from the user, the fourth pressure sensor is configured to detect a pulling force of the user on the hand rest, and the control circuit determines in real time whether the fourth pressure sensor detects the pulling force after controlling the braking force of the braking mechanism to decrease by one step, if so, determines that the user is pulling the cart, and controls the braking force of the braking mechanism to increase by one step at this time;
If the fourth pressure sensor does not detect the tensile force, further judging whether the pressure detected by the first pressure sensor becomes zero within a first preset time, if so, judging whether the pressure is detected again by the first pressure sensor in real time, and controlling the braking force of the braking mechanism to be reduced by one step again when the pressure is detected again by the first pressure sensor; otherwise, starting from the first preset time after the first pressure sensor detects the pressure, timing until the timing exceeds the second preset time, and controlling the braking force of the braking mechanism to be reduced by one step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910757969.6A CN110356458B (en) | 2019-08-16 | 2019-08-16 | Brake mechanism and handcart comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910757969.6A CN110356458B (en) | 2019-08-16 | 2019-08-16 | Brake mechanism and handcart comprising same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110356458A CN110356458A (en) | 2019-10-22 |
| CN110356458B true CN110356458B (en) | 2024-07-05 |
Family
ID=68224746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910757969.6A Active CN110356458B (en) | 2019-08-16 | 2019-08-16 | Brake mechanism and handcart comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110356458B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113908654A (en) * | 2021-10-26 | 2022-01-11 | 江苏卓维矿业科技有限公司 | Environment dust device for mining |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211281167U (en) * | 2019-08-16 | 2020-08-18 | 重庆工业职业技术学院 | Brake mechanism reaches handcart including this brake mechanism |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH7162A (en) * | 1893-08-05 | 1894-02-15 | Joseph Lipkowski | Economical pneumatic brake |
| FR732344A (en) * | 1931-02-28 | 1932-09-19 | Adjustment device for hydraulic brakes | |
| DE10304962A1 (en) * | 2003-02-06 | 2004-08-19 | Wanzl Metallwarenfabrik Gmbh | Transport trolley that can be moved by hand |
| DE102005048751A1 (en) * | 2005-10-10 | 2007-04-12 | Wanzl Metallwarenfabrik Gmbh | Luggage trolleys |
| CN201076983Y (en) * | 2005-10-13 | 2008-06-25 | 中建八局工业设备安装有限责任公司 | Rack-pinion outer-conduit rapid aligning device |
| CN201305082Y (en) * | 2008-10-29 | 2009-09-09 | 重庆宗申技术开发研究有限公司 | Right three-wheeled laden motorcycle |
| JP2012081243A (en) * | 2010-09-17 | 2012-04-26 | Oita Univ | Wheelchair with automatic brake |
| WO2012177233A1 (en) * | 2011-06-20 | 2012-12-27 | Baker Scott B | Wheelchair |
| US20150090539A1 (en) * | 2013-10-02 | 2015-04-02 | Jonathan Degnan | Brake Mechanism for Grocery and other User-Propelled Carts |
| WO2015079584A1 (en) * | 2013-11-29 | 2015-06-04 | 株式会社ナンシン | Electrical brake mechanism for caster |
| JP6779427B2 (en) * | 2014-10-30 | 2020-11-04 | 株式会社ニックス | Centrifugal braking device and manual propulsion vehicle equipped with it |
| CN204641260U (en) * | 2015-05-13 | 2015-09-16 | 池静 | Case and bag location castor |
| CN204666352U (en) * | 2015-05-29 | 2015-09-23 | 华北电力大学（保定） | A kind of brake shoe testing machine |
| CN206596484U (en) * | 2016-12-02 | 2017-10-31 | 重庆工业职业技术学院 | A kind of rotating disc type adds the modern seedling cultivation case of water certainly |
| CN106821627B (en) * | 2017-01-20 | 2018-07-27 | 广州足步医疗科技有限公司 | A kind of wheelchair and electronic parking mechanism |
| CN207449877U (en) * | 2017-10-25 | 2018-06-05 | 上海工程技术大学 | A kind of rail traffic vehicles folding auxiliary braking plate |
-
2019
- 2019-08-16 CN CN201910757969.6A patent/CN110356458B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211281167U (en) * | 2019-08-16 | 2020-08-18 | 重庆工业职业技术学院 | Brake mechanism reaches handcart including this brake mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110356458A (en) | 2019-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110356456B (en) | Handcart capable of realizing slope safety pushing | |
| NO20020152L (en) | Facilities for driving people from a rock station to a valley station | |
| CA2027319C (en) | Self-propelled platform car type conveying system | |
| CN110356458B (en) | Brake mechanism and handcart comprising same | |
| CN211281167U (en) | Brake mechanism reaches handcart including this brake mechanism | |
| CA2008023C (en) | Conveyor having self-propelled carrier | |
| WO1996022821A1 (en) | Transport apparatus | |
| CN211281162U (en) | Handcart capable of realizing safe pushing of slope | |
| CN112082776A (en) | Unmanned automobile ABS test bed with platform body lifting device | |
| CN106185207A (en) | The stair conveying arrangement of a kind of adjustable speed and method | |
| CN111071316B (en) | Steering portable cement cart | |
| JP2023535806A (en) | Compound power wheel pair, train, wheel rail system and train control method | |
| CN112726399A (en) | Bridge inspection vehicle device and method adaptive to rail installation errors | |
| CN212988805U (en) | Unmanned automobile ABS test bed with platform body lifting device | |
| CN108536150B (en) | Robot chassis and control method thereof | |
| CN113003342B (en) | Elevator multi-parameter detection emergency braking device based on embedded technology | |
| CN111071315B (en) | Cement shallow that turns to in a flexible way | |
| CN110356444B (en) | Medical trolley | |
| CN108327817A (en) | A kind of two-wheeled motor vehicle slide-proof support | |
| CN201484436U (en) | Mine car brake device | |
| CN214780166U (en) | Automatic off-hook manned chain car system | |
| KR102479769B1 (en) | racing car performing non-powered driving using gravity | |
| CN214459629U (en) | Bridge inspection vehicle device adaptive to track installation errors | |
| CN117088265B (en) | Gantry crane with stable parking positioning | |
| CN110497758B (en) | Intermediate wheel driven vehicle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |