CN114684080B - Braking system and braking method of electric mower - Google Patents
Braking system and braking method of electric mower Download PDFInfo
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- CN114684080B CN114684080B CN202210417980.XA CN202210417980A CN114684080B CN 114684080 B CN114684080 B CN 114684080B CN 202210417980 A CN202210417980 A CN 202210417980A CN 114684080 B CN114684080 B CN 114684080B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T7/00—Brake-action initiating means
- B60T7/02—Brake-action initiating means for personal initiation
- B60T7/04—Brake-action initiating means for personal initiation foot actuated
- B60T7/06—Disposition of pedal
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01D—HARVESTING; MOWING
- A01D69/00—Driving mechanisms or parts thereof for harvesters or mowers
- A01D69/10—Brakes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
- B60T17/18—Safety devices; Monitoring
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- Braking Elements And Transmission Devices (AREA)
Abstract
A brake system of an electric mower and a brake method thereof relate to the technical field of garden machinery, a brake control assembly (7) in the invention realizes the integration of service brake, emergency brake and parking brake functions, and a control flexible shaft assembly (6) adopts a combined structure of a stroke compensation spring and a control flexible shaft assembly, thereby effectively solving the problems of brake failure or brake overload damage caused by operation stroke change when a parking brake latch and a parking brake lock seat are hung in a traditional structure.
Description
Technical Field
The invention relates to the technical field of garden machinery, in particular to a braking system of an electric mower and a braking method thereof.
Background
As is known, lawn mowers are widely used in lawn trimming management work in yards, parks, soccer fields, golf courses, and municipal gardens, as core products of garden machines. With the improvement of living environment of cities and rural areas at home and abroad, lawns are gradually increased, the demand of the mower is sharply increased, and the market mostly mainly adopts a manual hand-push type or backpack type internal combustion engine power mower, and a small amount of internal combustion engine power riding type mowers or electric zero-steering mowers.
The hand-push type or backpack type internal combustion engine power mower only has an engine flameout pull wire or a starting switch and does not have a braking system, the start, stop and storage of the mower are judged by operators, and the hidden danger of subjective misjudgment exists.
The service braking and the emergency braking of the internal combustion engine power riding type mower usually adopt a structure of a front pedal or a middle brake handle, a movable pulley is tensioned through a pull rod, and the driving wheel is braked by virtue of tension; the parking brake usually adopts an independent control handle to lock a driving wheel, and an eccentric mechanism is utilized to lock the control handle to realize the parking brake; the brake system is complex, the production and maintenance costs are high, the brake operation is complex, and the working efficiency is low.
The traditional braking system of the electric zero-steering mower has two forms, one form adopts a pure mechanical braking device, the service braking and the parking braking are respectively controlled by adopting an independent pedal, the driving wheel brake is operated by a flexible shaft to realize the braking, and the problems of high parasitic power, instantaneous overload damage of a driving motor, low energy efficiency and the like exist in the service braking process; the other form is that an electromagnetic brake is additionally arranged on a driving motor of a driving wheel to realize driving and parking braking, the braking system needs to keep the electrified state of an electromagnetic clutch in the normal driving process, the energy efficiency is low, the operation economy is poor, and meanwhile, the structure is large in size, high in cost and inconvenient to maintain.
The inventor finds, through search, that chinese patent, application No. 201980001315.9, application No. 2019.03.28, and patent name of riding mower and operation device describe that riding mower and operation device mainly comprise a frame, a power output assembly, a walking assembly, a power supply device, a control module and an operation device assembly structure, and mainly protect adjustment of walking power and adjustment content of whole machine stability.
Chinese patent, application number 202023219079.7, application date is 2020.12.28, the patent name is lawn mower parking mechanism of stopping, including parking footboard, running-board, overhead gage, fourth baffle, second reset spring, the pivot, parking fixture block, the backup pad, the snap-on board, the third baffle, brake fixture block, brake pedal, the extension board, the limiting plate, the pedal pole, locking bolt, the fixed plate, the locating plate, the positioning bolt, the spacing bolt, the curb plate, first reset spring, the block is protruding, first baffle, the second baffle, structures such as bar hole. The upper part of a brake pedal is generally hinged with a flexible zipper, the other end of the flexible zipper is connected with a brake assembly of the rear wheel of the mower, and the flexible zipper can be driven to apply force to the brake assembly to brake the rear wheel of the mower when the brake pedal is stepped. The brake system is a split mechanical structure for controlling braking, the running brake and the emergency brake are braked through a pedal plate, and the parking brake is locked and parked through a treading rod.
China patent, application No. 202011570644.6, application date 2020.12.26, patent name start-stop control device and lawn mower with the same, including frame, actuating mechanism, actuating lever, accelerator, first pedal, bracket, first reset mechanism, brake assembly, brake lever, clamp plate, brake cable, spacing portion, second reset mechanism, locking assembly, pull rod, locking portion, elastic element, third reset mechanism and other structures, adopting a separate structure, realizing braking through a pedal during driving braking and emergency braking, realizing parking through combining the locking portion and the spacing portion by independently operating the pull rod in the locking assembly after stepping on the pedal. The braking method is that the pressing plate is vertically arranged and is connected with the brake rod and the brake cable, when the brake rod moves, the brake rod drives the pressing plate to swing, and then the brake cable is pulled to be tensioned for braking. When the starting mechanism is started, the starting mechanism can drive the locking assembly to unlock the brake assembly, so that the mower can walk.
Therefore, how to provide a braking system of an electric mower and a braking method thereof become a long-term technical demand of the technical personnel in the field.
Disclosure of Invention
In order to overcome the defects in the background art, the invention provides the braking system of the electric mower and the braking method thereof, which effectively solve the problems of complex structure, large operating force, low energy efficiency and poor environmental protection of the traditional riding type mower braking system, and meet the requirements of sustainable development of the modern garden machinery industry and the like.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the braking system of the electric mower comprises a driving motor, a brake, wheel-side reducers, driving wheels, a driving electric control unit, an operating flexible shaft assembly and a braking operating assembly, wherein the braking operating assembly is arranged on a fixed seat of a frame welding piece, the driving electric control unit is arranged on a support in the middle of the frame welding piece, the wheel-side reducers are respectively arranged on two main beams of the frame welding piece, a power input shaft of each wheel-side reducer is respectively connected with the driving motor, the two driving motors are respectively connected with the driving electric control unit, the brake is respectively arranged on a power output shaft of each wheel-side reducer, the driving wheels are respectively arranged at the end parts of the power output shafts on each wheel-side reducer, and each brake is respectively connected with the braking operating assembly through the operating flexible shaft assembly to form the braking system of the electric mower.
The brake system of the electric mower comprises a control flexible shaft assembly and a brake, wherein the control flexible shaft assembly comprises a stroke compensation spring and a control flexible shaft assembly, one end of the stroke compensation spring is connected with a rocker arm of the brake, the other end of the stroke compensation spring is connected to the left end of the control flexible shaft assembly, and the right end of the control flexible shaft assembly is connected with a flexible shaft assembly shaft on the brake control assembly.
The braking system of the electric mower comprises a return spring, a braking signal sensor, an upper limiting bolt, an installation spacer bush, a flexible shaft assembly shaft, a running brake pedal, a parking brake pedal, a rotating shaft, a parking brake pedal return spring, a parking brake pedal installation support, a parking brake latch, a parking brake lock seat, a parking brake installation rotating shaft, a lower limiting bolt and a brake rocker arm assembly piece, wherein the rotating shaft sleeve on the brake rocker arm assembly piece is arranged on a fixed seat through the rotating shaft, the flexible shaft assembly shaft is arranged at the middle lower part of the brake rocker arm plate on the brake rocker arm assembly piece, the installation spacer bushes are respectively sleeved on the outer edge surfaces at two ends of the flexible shaft assembly shaft, the flexible shaft assembly shaft at the outer side of each installation spacer bush is respectively connected with the control flexible shaft assembly piece on the control flexible shaft assembly, the braking signal sensor and the upper limiting bolt are arranged on the side wall at the left side of the fixed seat at intervals, the left end of the brake signal sensor is connected with a running driving electric control unit through a cable, the right end of the brake signal sensor corresponds to a front touch panel on a brake rocker arm assembly, the right end head of the upper limiting bolt corresponds to the front touch panel on the brake rocker arm assembly, the middle part of the front touch panel is connected with one end of a return spring, the other end of the return spring is connected with a middle beam of a frame welding assembly, a running brake pedal is arranged on a running brake pedal mounting plate on the brake rocker arm assembly, a parking brake latch, a parking brake pedal mounting bracket and a parking brake pedal return spring are arranged on a parking pedal mounting bracket plate on the brake rocker arm assembly through a parking brake mounting rotating shaft, a parking brake pedal is arranged on the parking brake pedal mounting bracket, and a parking brake lock seat is arranged on the frame welding assembly corresponding to the parking brake latch, and the middle part of the fixed seat is provided with a lower limiting bolt, and the upper end head of the lower limiting bolt corresponds to the lower contact plate of the rocker arm on the braking rocker arm assembly.
The braking system of the electric mower, a self-lubricating bearing sleeve is arranged between the inner edge surface of the rotating shaft sleeve and the outer edge surface of the rotating shaft, a rotating shaft limiting check ring is sleeved on the outer edge surface of the end of the rotating shaft, and a rotating shaft limiting pin is arranged on the rotating shaft outside the rotating shaft limiting check ring.
In the braking system of the electric mower, the outer edge of the flexible shaft assembly shaft on the outer side of each control flexible shaft assembly part is respectively sleeved with a gasket, and the outer edge of the flexible shaft assembly shaft on the outer side of each gasket is respectively provided with a cotter pin.
In the braking system of the electric mower, the braking signal sensor and the upper limiting bolt are respectively fixed on the side wall of the left side of the fixed seat through the sensor adjusting nut and the upper limiting adjusting nut.
In the braking system of the electric mower, the lower limiting bolt is arranged in the middle of the fixed seat through the lower limiting bolt adjusting nut.
The braking system of electric mower, be equipped with the gasket between the tip of parking brake installation pivot and the lateral surface of the parking footboard installation mounting bracket board on the braking rocking arm closes the piece, be equipped with the split pin on the outer fringe face of gasket outside parking brake installation pivot.
The braking system of electric mower, the braking rocking arm closes the piece and includes touch panel under pivot cover, preceding touch panel, braking rocking arm board, the brake pedal mounting panel that traveles, parking footboard installation mounting panel and the rocking arm, the brake rocking arm board sets up to two, and two braking rocking arm board intervals set up, and the pivot cover is connected to the lower extreme of two braking rocking arm boards, is equipped with the brake pedal mounting panel that traveles in the upper end of two braking rocking arm boards the interval is equipped with two parking footboard installation mounting panels below the brake pedal mounting panel that traveles, is equipped with preceding touch panel above two braking rocking arm board lower parts, is equipped with touch panel under the rocking arm below two braking rocking arm board lower parts.
A braking method of a braking system of an electric mower specifically comprises a driving braking and emergency braking method, a driving braking and emergency braking releasing method, a parking braking method and a parking braking releasing method, and specifically comprises the following steps:
the driving braking and emergency braking method comprises the steps that a driving brake pedal on a brake control assembly is stepped, a brake rocker arm assembly rotates clockwise around a rotating shaft, firstly, a front touch plate on the brake rocker arm assembly is separated from a brake signal sensor, a driving electric control unit receives a separation signal of the brake signal sensor, and the driving electric control unit controls a driving motor to stop driving and outputs instantaneous reverse torque to brake the driving motor forwards; when the running brake pedal is continuously treaded downwards, the brake rocker arm assembly drives the control flexible shaft assembly to move, and then the brake is driven to realize mechanical braking;
the driving brake and emergency brake release method is that the driving brake pedal on the brake control assembly is stopped to be stepped, the brake rocker arm assembly rotates anticlockwise around the rotating shaft under the action of the return spring, firstly, the brake rocker arm assembly drives the control flexible shaft assembly to move, and then the brake is driven to release mechanical brake; when the braking rocker arm assembly returns to the initial position, a front touch plate on the braking rocker arm assembly is contacted with the braking signal sensor, the running driving electric control unit receives a contact signal of the braking signal sensor, and the running driving electric control unit controls the running driving motor to start a driving function, so that a normal running state is realized;
the parking braking method is characterized in that a running braking pedal of a braking control assembly is stepped, a braking rocker arm assembly rotates clockwise around a rotating shaft, firstly, a front touch plate on the braking rocker arm assembly is separated from a braking signal sensor, a running driving electric control unit receives a separation signal of the braking signal sensor, and the running driving electric control unit controls a running driving motor to stop driving and outputs instantaneous reverse torque to realize that the running driving motor brakes ahead; when the running brake pedal is continuously treaded downwards, the brake rocker arm assembly drives the control flexible shaft assembly to move, and then the brake is driven to realize mechanical braking; the parking brake pedal moves in parallel in the whole process of trampling the running brake pedal, after the brake is completely locked and braked, the running brake pedal is continuously trampled, the brake rocker arm assembly continuously rotates, the flexible shaft assembly is operated to pull the stroke compensation spring to extend for supplementing the stroke, the position of a lower contact plate of the rocker arm on the brake rocker arm assembly is limited after the lower contact plate is contacted with a lower limit bolt on the frame welding assembly, the brake rocker arm assembly stops rotating, the position of the running brake pedal is kept unchanged, a driver rotates a ankle to continuously trample the parking brake pedal by using a sole, the parking brake pedal drives the parking brake pedal mounting bracket and the parking brake latch to rotate around the parking brake mounting rotating shaft, the rotation angle of the parking brake pedal is kept unchanged after the parking brake latch and the parking brake latch seat are connected and clamped, and the parking brake is stopped and trampled under the action of the return spring, and the brake latch rotates and is connected and locked with the parking brake latch seat, so as to realize parking brake;
the parking brake releasing method comprises the steps of stepping on a running brake pedal, enabling a lower contact plate of a rocker arm on a brake rocker arm assembly to be in contact with a lower limiting bolt on a frame welding assembly, enabling the parking brake pedal to automatically rotate anticlockwise under the action of a parking brake pedal return spring to realize reset, releasing the locking of the parking brake, stopping stepping on the running brake pedal, enabling the brake rocker arm assembly to automatically rotate anticlockwise under the action of the parking brake pedal return spring to reset, enabling a front contact plate on the brake rocker arm assembly to be in contact with a brake signal sensor, and releasing parking brake.
By adopting the technical scheme, the invention has the following advantages:
the brake control assembly realizes the integration of service braking, emergency braking and parking braking functions, and simultaneously, the control flexible shaft assembly adopts a stroke compensation spring and control flexible shaft assembly combined structure, thereby effectively solving the problems of brake failure or brake overload damage caused by operation stroke change when a parking brake latch and a parking brake lock seat of the traditional structure are hung, effectively solving the problems of complex structure, large control force, low energy efficiency and poor environmental protection of a braking system of the traditional riding mower, and meeting the sustainable development requirement of the modern garden machinery industry.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the brake actuating assembly of the present invention;
FIG. 3 is an enlarged, fragmentary structural view of the brake actuating assembly of the present invention;
FIG. 4 is a schematic structural view of the brake rocker assembly of the present invention;
FIG. 5 is a schematic structural view of the steering flexible shaft assembly of the present invention;
FIG. 6 is a schematic flow chart of a braking method of the present invention;
in the figure: 1. a travel drive motor; 2. a brake; 3. a hub reduction gear; 4. a drive wheel; 5. a travel drive electronic control unit; 6. operating the flexible shaft assembly; 601. a stroke compensation spring; 602. operating a flexible shaft assembly; 7. a brake operating assembly; 701. a return spring; 702. a brake signal sensor; 703. a sensor adjusting nut; 704. an upper limit screw; 705. installing a spacer bush; 706. a gasket; 707. assembling a shaft by using a flexible shaft; 708. a cotter pin; 709. a travel brake pedal; 710. a parking brake pedal; 711. a rotating shaft; 712. a rotating shaft limit pin; 713. a rotating shaft limiting retainer ring; 714. a self-lubricating bearing sleeve; 715. an upper limit adjusting nut; 716. a parking brake pedal return spring; 717. a parking brake pedal mounting bracket; 718. a parking brake latch; 719. a parking brake lock seat; 720. a rotating shaft is installed in the parking brake; 721. a lower limit bolt; 722. a lower limit bolt adjusting nut; 723. braking the rocker arm assembly; 7231. a rotating shaft sleeve; 7232. a front touch panel; 7233. braking the rocker arm plate; 7234. a service brake pedal mounting plate; 7235. a parking pedal is provided with a bracket plate; 7236. a rocker arm lower touch panel; 8. a frame weldment; 9. a fixed seat.
Detailed Description
The present invention will be explained in more detail by the following examples, which are not intended to limit the invention;
in the description of the present invention, it is to be understood that the terms "central", "lateral", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "side", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
With reference to the accompanying drawings 1-6, the braking system of the electric mower comprises a driving motor 1, a brake 2, a hub reduction gear 3, a driving wheel 4, a driving electric control unit 5, an operating flexible shaft assembly 6 and a braking operating assembly 7, wherein the braking operating assembly 7 is arranged on a fixed seat 9 of a frame welding part 8 and used for braking operation of the mower, the driving electric control unit 5 is arranged on a support in the middle of the frame welding part 8, and the receiving processing of an operating signal of the braking operating assembly 7 and the accurate control of the driving motor 1 are realized through a distributed bus technology; wheel reducers 3 are respectively arranged on two main beams of a frame welding part 8, a power input shaft of each wheel reducer 3 is respectively connected with a driving motor 1, the two driving motors 1 are respectively connected with a driving electric control unit 5, a brake 2 is respectively arranged on a power output shaft of each wheel reducer 3, a driving wheel 4 is respectively arranged at the end part of the power output shaft on each wheel reducer 3, the driving wheel 4 provides rear support, driving power and braking control for the whole electric mower, the driving motors 1 are directly connected with the wheel reducers 3, the energy transmission efficiency and the part operation safety are improved, the brakes 2 are integrated with the wheel reducers 3, the part number is reduced, the cost is saved, and the braking is safe and reliable; each brake 2 is connected with a brake control assembly 7 through a control flexible shaft assembly 6, so that the control conversion link is reduced, the control efficiency is improved, the brake performance is stable and reliable, and during implementation, two main beams of the frame welding piece 8 are respectively provided with a steering wheel, specifically as shown in figure 1, the frame welding piece 8 is supported by the two steering wheels and two driving wheels 4.
In the specific implementation of the invention, the driving motor 1, the brake 2, the hub reduction gear 3, the driving wheel 4, the driving electric control unit 5 and the control flexible shaft assembly 6 are standard products or products in the prior art in the market and can be purchased and obtained from the market, so the detailed structure of the invention is not described in detail.
Further, as shown in fig. 5, the operating flexible shaft assembly 6 includes a stroke compensation spring 601 and an operating flexible shaft assembly 602, one end of the stroke compensation spring 601 is connected to the rocker arm of the brake 2, the other end of the stroke compensation spring 601 is connected to the left end of the operating flexible shaft assembly 602, the right end of the operating flexible shaft assembly 602 is connected to a flexible shaft assembly shaft 707 on the brake operating assembly 7, and the stroke compensation spring 601 is used for compensating the rotation stroke of the brake rocker arm assembly 723 in a brake locking state of the brake 2 and protecting the brake 2 when the parking brake is hooked or released.
Further, as shown in fig. 2 and 3, the brake operating assembly 7 includes a return spring 701, a brake signal sensor 702, an upper limit bolt 704, an installation spacer 705, a flexible shaft assembly shaft 707, a running brake pedal 709, a parking brake pedal 710, a rotating shaft 711, a parking brake pedal return spring 716, a parking brake pedal installation bracket 717, a parking brake latch 718, a parking brake lock seat 719, a parking brake installation rotating shaft 720, a lower limit bolt 721 and a brake rocker arm assembly 723, wherein the rotating shaft sleeve 7231 on the brake rocker arm assembly 723 is disposed on the fixed seat 9 through the rotating shaft 711, the brake rocker arm assembly 723 rotates around the rotating shaft 711 during brake operation to achieve brake or brake release, and in implementation, a self-lubricating bearing sleeve 714 is disposed between an inner edge surface of the rotating shaft sleeve 7231 and an outer edge surface of the rotating shaft 711, and the self-lubricating bearing sleeve 714 is disposed to reduce resistance of the brake rocker arm assembly 723 rotating around the rotating shaft 711 during brake operation, thereby improving man-machine operability; a rotating shaft limiting retainer ring 713 is sleeved on the outer edge surface of the end of the rotating shaft 711, a rotating shaft limiting pin 712 is arranged on the rotating shaft 711 outside the rotating shaft limiting retainer ring 713, a flexible shaft assembly shaft 707 is arranged at the middle lower part of a braking rocker arm plate 7233 on a braking rocker arm assembly 723, mounting spacers 705 are respectively sleeved on the outer edge surfaces at two ends of the flexible shaft assembly shaft 707, the flexible shaft assembly shaft 707 outside each mounting spacer 705 is respectively connected with an operating flexible shaft assembly 602 on an operating flexible shaft assembly 6, gaskets 706 are respectively sleeved on the outer edge of the flexible shaft assembly shaft 707 outside each operating flexible shaft assembly 602, and cotter pins 708 are respectively arranged on the outer edge of the flexible shaft assembly shaft 707 outside each gasket 706; in implementation, when the driving brake pedal 709 is operated, the brake rocker arm assembly 723 rotates around the rotating shaft 711 to drive the operating flexible shaft assembly 6 to move, so that the brake rocker arm of the brake 2 is driven to rotate to realize braking or brake release; a brake signal sensor 702 and an upper limit bolt 704 are arranged on the side wall on the left side of the fixed seat 9 at intervals, the left end of the brake signal sensor 702 is connected with the running driving electric control unit 5 through a cable, the right end of the brake signal sensor 702 corresponds to a front touch plate 7232 on a brake rocker arm assembly 723, and the right end of the upper limit bolt 704 corresponds to the front touch plate 7232 on the brake rocker arm assembly 723, so that in implementation, the brake signal sensor 702 and the upper limit bolt 704 are fixed on the side wall on the left side of the fixed seat 9 through a sensor adjusting nut 703 and an upper limit adjusting nut 715 respectively; during implementation, the upper limit adjusting nut 715 adjusts the distance between the upper limit bolt 704 and the front contact plate 7232 on the brake rocker arm assembly 723, the sensor adjusting nut 703 adjusts the distance between the brake signal sensor 702 and the front contact plate 7232 on the brake rocker arm assembly 723, the distance between the upper limit bolt 704 and the front contact plate 7232 is adjusted to a proper position during assembly, and then the distance between the brake signal sensor 702 and the front contact plate 7232 is adjusted, so that the effectiveness of brake signal acquisition and the safety of the brake signal sensor 702 are ensured; the middle part of the front touch plate 7232 is connected with one end of a return spring 701, the other end of the return spring 701 is connected with a middle beam of the frame welding part 8, a running brake pedal 709 is arranged on a running brake pedal mounting plate 7234 on the brake rocker arm part 723, and in implementation, the return spring 701 provides main resistance for stepping on by the running brake pedal 709 and return force of the brake rocker arm part 723, so that the effectiveness and safety of operation are ensured; a parking brake latch 718, a parking brake pedal mounting bracket 717 and a parking brake pedal return spring 716 are mounted on a parking pedal mounting bracket plate 7235 on a brake rocker arm assembly 723 through a parking brake mounting rotating shaft 720, a gasket 706 is arranged between the end of the parking brake mounting rotating shaft 720 and the outer side face of the parking brake mounting bracket plate 7235 on the brake rocker arm assembly 723, a cotter pin 708 is arranged on the outer edge face of the parking brake mounting rotating shaft 720 outside the gasket 706, a parking brake pedal 710 is arranged on the parking brake pedal mounting bracket 717, a parking brake lock seat 719 is arranged on a frame welding assembly 8 below the parking brake latch 718, the parking brake latch rotates clockwise around the parking brake mounting rotating shaft 710 along with the parking brake pedal mounting bracket 717 and the parking brake pedal 710 when the parking brake pedal 710 is engaged with parking brake, the parking brake pedal mounting bracket 717 and the parking brake pedal 710 operate the parking brake pedal 718, the parking brake pedal latch operates on the parking brake pedal return spring 718 under the action of the parking brake pedal, the parking brake pedal mounting bracket 717 and the parking brake pedal 710 and the parking brake pedal return spring 716, and the automatic brake pedal return spring 709 and the parking brake pedal return spring 710 after the parking brake pedal return spring returns to the surface and the surface returns to the original position; a lower limiting bolt 721 is arranged in the middle of the fixed seat 9, the lower limiting bolt 721 is arranged in the middle of the fixed seat 9 through a lower limiting bolt adjusting nut 722, and the upper end of the lower limiting bolt 721 corresponds to a rocker arm lower touch plate 7236 on a brake rocker arm assembly 723; when the lower limit bolt 721 is installed, the parking brake pedal 710 is firstly stepped to the parking brake hanging position, the position of the brake rocker arm assembly 723 is braked, and then the lower limit bolt adjusting nut 722 is adjusted, so that the flexibility and convenience of parking brake hanging or releasing are ensured.
Further, as shown in fig. 4, the brake rocker arm assembly 723 includes a spindle sleeve 7231, a front touch panel 7232, a brake rocker arm plate 7233, a service brake pedal mounting plate 7234, a parking pedal mounting bracket plate 7235 and a rocker arm lower touch panel 7236, the number of the brake rocker arm plates 7233 is two, the two brake rocker arm plates 7233 are arranged at intervals, the lower ends of the two brake rocker arm plates 7233 are connected to the spindle sleeve 7231, the service brake pedal mounting plate 7234 is arranged at the upper ends of the two brake rocker arm plates 7233, the two parking pedal mounting bracket plates 7235 are arranged at intervals below the service brake pedal mounting plate 7234, the front touch panel 7232 is arranged above the lower portions of the two brake rocker arm plates 7233, and the rocker arm lower touch panel 7236 is arranged below the lower portions of the two brake rocker arm plates 7233. When in implementation, the two brake rocker arm plates 7233 are respectively welded on the rotating shaft sleeve 7231 to provide a brake control arm of force; a service brake pedal mounting plate 7234 is welded to the brake rocker plate 7233 for mounting the service brake pedal 709; a parking pedal mounting bracket plate 7235 welded to the service brake pedal mounting plate 7234 for mounting the parking brake pedal mounting bracket 717, the parking brake latch 718, and the parking brake mounting shaft 720; the front touch plate 7232 is welded to the front end of the brake rocker plate 7233 and is used for installing a return spring 701, and a brake signal sensor 702 is used for sensing a brake operating signal and limiting the upward movement of the brake rocker assembly 723; the rocker arm lower contact plate 7236 is welded in the middle of the brake rocker arm plate 7233 and is used for limiting the downward movement of the brake rocker arm assembly 723 so as to protect the brake 2.
A braking method of a braking system of an electric mower specifically comprises a driving braking and emergency braking method, a driving braking and emergency braking releasing method, a parking braking method and a parking braking releasing method, and as shown in FIG. 6, the specific method comprises the following steps:
the driving braking and emergency braking method comprises the steps of stepping on a brake pedal, braking a rocker arm assembly to move, sending a separation signal by a brake sensor, receiving and processing the signal by a driving electric control unit, stopping driving by a driving motor and outputting instantaneous reverse torque, braking by the driving motor, continuously stepping on the brake pedal, and combining mechanical braking of a brake to realize driving braking and emergency braking; specifically, when the running brake pedal 709 on the brake control assembly 7 is stepped on, the brake rocker arm assembly 723 rotates clockwise around the rotating shaft 711, firstly, the front touch plate 7232 on the brake rocker arm assembly 723 is separated from the brake signal sensor 702, the running drive electronic control unit 5 receives a separation signal of the brake signal sensor 702, and the running drive electronic control unit 5 controls the running drive motor 1 to stop driving and outputs instantaneous reverse torque to brake the running drive motor 1 to go ahead; when the running brake pedal 709 is continuously stepped downwards, the brake rocker arm assembly 723 drives the control flexible shaft assembly 6 to move, and further drives the brake 2 to realize mechanical braking;
the driving braking and emergency braking release method comprises the steps of stopping treading a brake pedal, automatically resetting a brake rocker arm assembly, separating mechanical braking of a brake, further automatically resetting the brake rocker arm assembly, sending a contact signal by a brake sensor, receiving and processing the signal by a driving electric control unit, resetting the driving function of a driving motor, and releasing the driving braking and the emergency braking; specifically, when the running brake pedal 709 on the brake control assembly 7 is stopped to be stepped, under the action of the return spring 701, the brake rocker arm assembly 723 rotates anticlockwise around the rotating shaft 711, firstly, the brake rocker arm assembly 723 drives the control flexible shaft assembly 6 to move, and then the brake 2 is driven to release mechanical braking; when the brake rocker arm assembly 723 returns to the initial position, the front touch plate 7232 on the brake rocker arm assembly 723 is in contact with the brake signal sensor 702, the running driving electric control unit 5 receives a contact signal of the brake signal sensor 702, and the running driving electric control unit 5 controls the running driving motor 1 to start a driving function, so that a normal running state is realized;
the parking brake method comprises the steps of stepping on a brake pedal, braking a rocker arm assembly to move, sending a separation signal by a brake sensor, receiving and processing the signal by a driving drive electric control unit, stopping driving the driving drive motor and outputting instant reverse torque, braking the driving drive motor forwards, continuously stepping on the brake pedal, combining mechanical braking of a brake, continuously stepping on the brake pedal, stretching a stroke compensation spring, continuously moving the brake rocker arm assembly, contacting and limiting the brake rocker arm assembly with a lower limiting bolt, stepping on the parking brake pedal and rotationally hanging the parking brake pedal, stopping stepping on the brake pedal and the parking brake pedal, driving the brake rocker arm assembly to automatically reset and brake and lock the parking brake by a return spring, and realizing parking braking; specifically, when the running brake pedal 709 of the brake control assembly 7 is stepped on, the brake rocker arm assembly 723 rotates clockwise around the rotating shaft 711, firstly, the front touch plate 7232 on the brake rocker arm assembly 723 is separated from the brake signal sensor 702, the running drive electronic control unit 5 receives a separation signal of the brake signal sensor 702, and the running drive electronic control unit 5 controls the running drive motor 1 to stop driving and outputs instantaneous reverse torque to realize that the running drive motor 1 brakes ahead; when the running brake pedal 709 is continuously stepped downwards, the brake rocker arm assembly 723 drives the control flexible shaft assembly 6 to move, and further drives the brake 2 to realize mechanical braking; stepping on the parking brake pedal 710 in the whole process of the running brake pedal 709 to move in parallel, after the brake 2 is completely locked and braked, continuously stepping on the running brake pedal 709, continuously rotating the brake rocker arm assembly 723, operating the flexible shaft assembly 602 to pull the stroke compensation spring 601 to extend for supplementing the stroke, enabling a rocker arm lower touch plate 7236 on the brake rocker arm assembly 723 to be in contact with a lower limit bolt 721 on the frame welding assembly 8 to realize limiting, stopping rotating the brake rocker arm assembly 723, keeping the position of the running brake pedal 709 unchanged, enabling a driver to continuously step on the parking brake pedal 710 by rotating the ankle with the sole, enabling the parking brake pedal 710 to drive the parking brake pedal mounting bracket 717 and the parking brake latch 718 to rotate around the parking brake mounting rotating shaft 720, keeping the rotating angle of the parking brake pedal 710 unchanged and stopping stepping on the parking brake pedal 718 and the parking brake latch seat 719 until the parking brake latch 718 and the parking brake latch seat 719 are hooked, and locked, and realizing parking brake;
the parking brake releasing method comprises the steps of stepping on a brake pedal, stretching a stroke compensation spring, continuing to move a brake rocker assembly, contacting and limiting the brake rocker assembly with a lower limiting bolt, automatically releasing and resetting the locking of the parking brake pedal, stopping stepping on the brake pedal, automatically resetting the brake rocker assembly, separating the mechanical brake of a brake, further automatically resetting the brake rocker assembly, sending a contact signal by a brake sensor, receiving and processing the signal by a driving electric control unit, resetting the driving function of a driving motor, and releasing the parking brake; specifically, the running brake pedal 709 is stepped on, a rocker lower touch plate 7236 on a brake rocker assembly 723 is in contact with a lower limiting bolt 721 on a frame welding assembly 8, the parking brake pedal 710 automatically rotates anticlockwise under the action of a parking brake pedal return spring 716 to realize reset, parking brake locking is released, the running brake pedal 709 is stopped being stepped on, the brake rocker assembly 723 automatically rotates anticlockwise under the action of the parking brake pedal return spring 716 to reset, a front touch plate 7232 on the brake rocker assembly 723 is in contact with a brake signal sensor 702, and parking brake is released.
The invention adopts the overload prevention braking before, and the braking process, the motor stops driving and brakes before, thus saving energy and effectively preventing the motor from being damaged by overload; the braking operation control method is adopted, during braking, mechanical braking is carried out through the pedal, the flexible shaft and the brake disc structure after the motor is braked, and the mechanical braking can be carried out through locking of the locking device, so that parking braking is realized, and braking is reliable; the brake release control method is adopted, during the brake release process, the rocker arm of the brake disc automatically returns through the torsion spring, the mechanical brake is released firstly, the motor releases the brake after braking along with the automatic return and elevation of the pedal, and the abrasion of the brake disc and the overload of the motor are avoided; the integrated brake system is adopted, the integration of the functions of service braking, emergency braking and parking braking is realized, the structure is compact, and the cost is low. Has obvious international competitiveness of products and can effectively increase the international market proportion of domestic gardening mowers.
The invention has the following beneficial effects:
1. the functions of service braking, emergency braking and parking braking are integrated in a brake control assembly, the structure is compact, and the cost is low;
2. the control flexible shaft assembly adopts a combined structure of a stroke compensation spring and a control flexible shaft assembly, and effectively solves the problem that when a parking brake lock latch and a parking brake lock seat are hung and connected in a traditional structure, the brake fails or the brake is damaged due to brake overload caused by the change of the operation stroke;
3. in the braking process, the driving of the driving motor is firstly stopped and the instantaneous reverse torque output by the driving motor is simultaneously controlled to realize forward braking by the braking signal sensor and the driving electric control unit, so that parasitic power loss is eliminated, energy is saved, efficiency is high, overload damage of the driving motor is effectively prevented, and the brake is mechanically braked, so that the braking is safe and reliable;
4. in the process of brake release, firstly, the mechanical brake of the traveling brake is released, and then the driving state of the driving motor is reset, so that the safety of slope operation and the like are ensured.
The present invention is not described in detail in the prior art.
The embodiments selected for the purpose of disclosing the invention, are presently considered to be suitable, it being understood, however, that the invention is intended to cover all variations and modifications of the embodiments which fall within the spirit and scope of the invention.
Claims (9)
1. The utility model provides an electric mower's braking system, is including driving motor (1), stopper (2), hub reduction gear (3), drive wheel (4), the automatically controlled unit of driving (5), manipulation flexible axle assembly (6) and braking manipulation assembly (7) of going, characterized by: the brake control assembly (7) is arranged on a fixed seat (9) of a frame welding part (8), a driving drive electric control unit (5) is arranged on a support in the middle of the frame welding part (8), wheel reducers (3) are respectively arranged on two main beams of the frame welding part (8), a power input shaft of each wheel reducer (3) is respectively connected with a driving drive motor (1), the two driving drive motors (1) are respectively connected with a driving drive electric control unit (5), a brake (2) is respectively arranged on a power output shaft of each wheel reducer (3), a driving wheel (4) is respectively arranged at the end part of the power output shaft on each wheel reducer (3), each brake (2) is respectively connected with the brake control assembly (7) through a control flexible shaft assembly (6), the brake control assembly (7) comprises a return spring (701), a parking brake signal sensor (702), an upper limit bolt (704), a mounting spacer (705), a flexible shaft assembly shaft (707), a driving brake pedal (709), a brake pedal (710), a parking brake pedal (711), a parking brake pedal reset mounting bracket (716), a parking brake latch (719), a lower limit bolt (721) and a brake locking part (721), a rotating shaft sleeve (7231) on the braking rocker arm assembly (723) is arranged on a fixed seat (9) through a rotating shaft (711), a flexible shaft assembly shaft (707) is arranged at the middle lower part of a braking rocker arm plate (7233) on the braking rocker arm assembly (723), mounting spacers (705) are respectively sleeved on the outer edge surfaces at the two ends of the flexible shaft assembly shaft (707), the flexible shaft assembly shaft (707) outside each mounting spacer (705) is respectively connected with an operating flexible shaft assembly (602) on an operating flexible shaft assembly (6), a braking signal sensor (702) and an upper limiting bolt (704) are arranged on the side wall on the left side of the fixed seat (9) at intervals, the left end of the braking signal sensor (702) is connected with a driving electric control unit (5) through a cable, the right end of braking signal sensor (702) corresponds preceding touch panel (7232) on braking rocking arm assembly (723), the right end of last spacing bolt (704) corresponds preceding touch panel (7232) on braking rocking arm assembly (723), the one end of return spring (701) is connected in the middle part of preceding touch panel (7232), and the well roof beam of frame seam piece (8) is connected to the other end of return spring (701), is equipped with traveling brake pedal (709) on traveling brake pedal mounting panel (7234) on braking rocking arm assembly (723), installs pivot (720) ann through parking brake on parking pedal installation mounting panel (7235) on braking rocking arm assembly (723) Be equipped with parking brake hasp (718), parking brake pedal installing support (717) and parking brake pedal reset spring (716) be equipped with parking brake pedal (710) on parking brake pedal installing support (717), be equipped with parking brake lock seat (719) on the frame seam spare (8) that correspond parking brake hasp (718), be equipped with down limit bolt (721) at the middle part of fixing base (9), touch panel (7236) down under the upper end of lower limit bolt (721) corresponds the rocking arm on the braking rocking arm closes the piece (723) and forms the braking system of electric mower.
2. The electric mower brake system of claim 1, wherein: the control flexible shaft assembly (6) comprises a stroke compensation spring (601) and a control flexible shaft assembly (602), one end of the stroke compensation spring (601) is connected with a rocker arm of the brake (2), the other end of the stroke compensation spring (601) is connected to the left end of the control flexible shaft assembly (602), and the right end of the control flexible shaft assembly (602) is connected with a flexible shaft assembly shaft (707) on the brake control assembly (7).
3. The electric mower brake system as claimed in claim 1, wherein: be equipped with self-lubricating bearing cover (714) between the outer fringe surface of the interior edge face of pivot cover (7231) and rotation axis (711), cup jointed the spacing retaining ring of pivot (713) on the outer fringe surface of rotation axis (711) end, be equipped with rotation axis spacer pin (712) on rotation axis (711) in the spacing retaining ring of pivot (713) outside.
4. The electric mower brake system as claimed in claim 1, wherein: gaskets (706) are sleeved on the outer edge of the flexible shaft assembly shaft (707) on the outer side of each control flexible shaft assembly (602), and cotter pins (708) are arranged on the outer edge of the flexible shaft assembly shaft (707) on the outer side of each gasket (706).
5. The electric mower brake system of claim 1, wherein: the brake signal sensor (702) and the upper limiting bolt (704) are respectively fixed on the side wall of the left side of the fixed seat (9) through a sensor adjusting nut (703) and an upper limiting adjusting nut (715).
6. The electric mower brake system of claim 1, wherein: the lower limiting bolt (721) is arranged in the middle of the fixed seat (9) through a lower limiting bolt adjusting nut (722).
7. The electric mower brake system of claim 1, wherein: and a gasket (706) is arranged between the end head of the parking brake mounting rotating shaft (720) and the outer side surface of a parking pedal mounting support plate (7235) on the brake rocker arm assembly (723), and a split pin (708) is arranged on the outer edge surface of the parking brake mounting rotating shaft (720) outside the gasket (706).
8. The electric mower brake system as claimed in claim 1, wherein: braking rocking arm closes piece (723) and includes touch panel (7236) under pivot cover (7231), preceding touch panel (7232), braking rocking arm board (7233), the service brake pedal mounting panel (7234), parking footboard installation cradling piece (7235) and the rocking arm, braking rocking arm board (7233) sets up to two, and two braking rocking arm board (7233) intervals set up, and pivot cover (7231) is connected to the lower extreme of two braking rocking arm boards (7233), is equipped with service brake pedal mounting panel (7234) in the upper end of two braking rocking arm boards (7233) the interval is equipped with two parking footboard installation cradling pieces (7235) below service brake pedal mounting panel (7234), is equipped with preceding touch panel (7232) on two braking rocking arm board (7233) lower parts, is equipped with touch panel (7236) under the rocking arm below two braking rocking arm boards (7233) lower parts.
9. A method of braking a braking system for an electric lawn mower as claimed in any one of claims 1 to 8, wherein: the braking method specifically comprises a driving braking and emergency braking method, a driving braking and emergency braking release method, a parking braking method and a parking braking release method, and specifically comprises the following steps:
the running braking and emergency braking method comprises the steps of stepping on a running braking pedal (709) on a braking control assembly (7), wherein a braking rocker arm assembly (723) rotates clockwise around a rotating shaft (711), firstly, a front touch plate (7232) on the braking rocker arm assembly (723) is separated from a braking signal sensor (702), a running driving electric control unit (5) receives a separation signal of the braking signal sensor (702), and the running driving electric control unit (5) controls a running driving motor (1) to stop driving and outputs instantaneous reverse torque to brake the running driving motor (1) in the forward direction; when the running brake pedal (709) is continuously stepped downwards, the brake rocker arm assembly (723) drives the control flexible shaft assembly (6) to move so as to drive the brake (2) to realize mechanical braking;
the driving brake and emergency brake release method is that a driving brake pedal (709) on a brake control assembly (7) is stopped to be stepped, a brake rocker arm assembly (723) rotates anticlockwise around a rotating shaft (711) under the action of a return spring (701), firstly, the brake rocker arm assembly (723) drives a control flexible shaft assembly (6) to move, and then a brake (2) is driven to release mechanical brake; when the braking rocker arm assembly (723) returns to the initial position, a front touch plate (7232) on the braking rocker arm assembly (723) is in contact with a braking signal sensor (702), a running driving electric control unit (5) receives a contact signal of the braking signal sensor (702), and the running driving electric control unit (5) controls a running driving motor (1) to start a driving function to realize a normal running state;
the parking brake method is characterized in that on the basis of a driving brake method and an emergency brake method, a parking brake pedal (710) moves in parallel in the whole process of stepping on the driving brake pedal (709), after a brake (2) is completely locked and braked, the driving brake pedal (709) is continuously stepped on, a brake rocker arm assembly (723) continuously rotates, a flexible shaft assembly (602) is controlled to pull a stroke compensation spring (601) to extend for supplementing a stroke, a rocker arm lower touch plate (7236) on the brake rocker arm assembly (723) is contacted with a lower limit bolt (721) on a frame welding assembly (8) to realize limiting, the brake rocker arm assembly (723) stops rotating, the position of the driving brake pedal (709) is kept unchanged, a driver rotates a foot palm to continuously step on the parking brake pedal (710), the parking brake pedal (710) drives a parking brake pedal mounting bracket (717) and a parking brake latch (718) to rotate around a brake mounting rotating shaft (720), and the parking brake latch (718) and a parking brake latch locking seat (719) are locked after the parking brake latch (718) and a swing brake seat (718) are hooked, the parking brake pedal (710) is kept unchanged, and the parking brake latch (701) and the parking brake seat (718) is returned;
the parking brake releasing method comprises the steps of stepping on a running brake pedal (709), enabling a rocker arm lower contact plate (7236) on a brake rocker arm assembly (723) to be in contact with a lower limit bolt (721) on a frame welding assembly (8), enabling the parking brake pedal (710) to automatically rotate anticlockwise under the action of a parking brake pedal return spring (716) to achieve resetting, releasing parking brake locking, stopping stepping on the running brake pedal (709), enabling the brake rocker arm assembly (723) to automatically rotate anticlockwise under the action of the parking brake pedal return spring (716) to reset, enabling a front contact plate (7232) on the brake rocker arm assembly (723) to be in contact with a brake signal sensor (702), and releasing parking brake.
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| CN202210417980.XA CN114684080B (en) | 2022-04-21 | 2022-04-21 | Braking system and braking method of electric mower |
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| CN202210417980.XA CN114684080B (en) | 2022-04-21 | 2022-04-21 | Braking system and braking method of electric mower |
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