CN211308521U - Working vehicle - Google Patents

Abstract

The utility model discloses an operation car has: a brake mechanism (6) for braking the traveling devices (2L, 2R); a brake pedal (10) that is provided on the floor (4) of the driver's part (3) and operates the brake mechanism (6); a link mechanism (11) that links the brake pedal (10) and the brake mechanism (6) via a position lower than the floor (4); and a detection sensor (35) for detecting the depression of the brake pedal (10), wherein the brake pedal (10) and the brake mechanism (6) are arranged in a state of being displaced in the left-right direction of the machine body, the link mechanism (11) has a rotating shaft (13) which is positioned at a position lower than the floor portion (4) and extends in the left-right direction of the machine body, and the rotating shaft (13) has a detection body (36) which is the detection object of the sensor (35). When assembling the detection sensor, it is desirable to be less subject to restrictions in assembly.

Description

Working vehicle

Technical Field

The utility model relates to a have the operation car that detects the detection sensor who detects the brake pedal and receive the condition of trampling.

Background

For example, the detection sensor is used to allow the engine to start when the brake pedal is depressed, and to restrict the engine from starting when the brake pedal is not depressed. In addition, conventionally, the detection sensor is disposed near the brake pedal, and performs a detection operation based on a movement of the brake pedal accompanying the depression of the brake pedal.

However, in the above-described structure, since the detection sensor needs to be mounted in a narrow space near the brake pedal, the assembly of the detection sensor may be restricted due to the narrow space, and the assembly work may be difficult.

SUMMERY OF THE UTILITY MODEL

(problem to be solved by the utility model)

Here, when assembling the sensor, it is desirable to realize a work vehicle which is less restricted in assembly.

(means for solving the problems)

The utility model discloses an operation car's characterized in that has: a driving section; a traveling device provided at a position lower than a floor portion of the driver section; a brake mechanism that brakes the travel device; a brake pedal disposed on a floor portion of the driving portion, the brake pedal operating the brake mechanism; a link mechanism that links the brake pedal and the brake mechanism via a position lower than the floor portion; and a detection sensor that detects a depression of the brake pedal, wherein the brake pedal and the brake mechanism are provided in a state displaced in a lateral direction of the body, the link mechanism has a pivot shaft extending in the lateral direction of the body at a position lower than the floor portion, and the pivot shaft has a detection body as a detection target of the sensor.

According to the present invention, when the brake pedal is operated by stepping, the change accompanying this operation is transmitted to the brake mechanism via the link mechanism, thereby braking the traveling device. At this time, the detection body rotates together with the rotation shaft provided in the link mechanism, and the detection sensor is in a detection state.

Since the rotating shaft extends in the left-right direction of the machine body, the detecting body and the detecting sensor can be disposed at positions deviated in the left-right direction of the machine body from the brake pedal. As a result, the detection sensor can be disposed in a vacant area away from the brake pedal, thereby being less restricted in assembly.

Preferably, the rotation shaft is supported at both ends in the axial direction, and the detection body is provided at a portion of the rotation shaft close to the ends in the axial direction.

According to this structure, the rotating shaft is rotated in a stable state by means of both-side support. Further, since the detection body is provided at a stable position near the axial center direction end of the rotating shaft, the detection body can be accurately rotated in accordance with the displacement of the brake pedal, and can be detected by the detection sensor.

Preferably, the detection body is provided at a position on one side of the rotation shaft, which is close to the end in the axial direction, of the brake pedal.

According to this configuration, since the detection body is provided at a portion of the rotation shaft close to the end portion in the axial direction on the side close to the brake pedal, more accurate detection can be performed in accordance with the displacement of the brake pedal.

In the present invention, it is preferable that the detection sensor is of a pressing operation type in which a detection operation is performed by receiving a pressing operation of the detection body by a detection operation unit, and the detection body is formed of a plate-like body.

According to this configuration, since the detection acting portion is pressed by the detection body, the detection facing surface of the detection body can be made wider, the degree of freedom in installation of the detection sensor is higher, and the accuracy of position adjustment is not required, so that the detection sensor can be easily mounted.

In the present invention, it is preferable that the detection sensor is supported by a support frame supporting the floor portion via a bracket.

According to this configuration, the detection sensor can be stably supported by the support frame having a large strength for supporting the floor portion.

In the present invention, preferably, the link mechanism includes: a first arm connecting the rotating shaft and the brake pedal; a second arm coupled to the pivot shaft at a position offset in the left-right direction from the first arm, and extending parallel to the first arm; and a connecting member that connects a middle portion of the first arm and a free end side of the second arm.

According to this configuration, the link mechanism has a rectangular frame-shaped structure formed by the first arm, the second arm, the connecting member, and the rotating shaft, and therefore has a high overall strength. As a result, when the brake pedal is operated, the displacement can be accurately transmitted to the brake mechanism with less error due to flexural deformation or the like.

In the present invention, preferably, the detection sensor is provided below the floor portion and at a position away from the floor portion.

According to this configuration, since the upper side of the detection sensor is covered with the floor portion, it is possible to easily avoid the rainwater from falling to the detection sensor. Further, since the detection device is not affected by the vibration of the floor portion, a good detection operation can be continued.

In the present invention, it is preferable that the lateral side of the driver's part has a side panel, and the detection sensor is provided at a position below the side panel and away from the floor part.

According to this configuration, since the upper side of the detection sensor is covered with the side panel, it is possible to easily avoid rainwater from falling to the detection sensor. Further, since the detection device is not affected by the vibration of the floor portion, a good detection operation can be continued.

Drawings

Fig. 1 is a side view showing a brake operation structure.

Fig. 2 is a front view showing a brake operation structure.

Fig. 3 is a plan view showing a brake operation structure.

Description of the reference numerals

2L, 2R: a traveling device.

3: a driving part.

4: a floor portion.

6: and a brake mechanism.

10: a brake pedal.

11: a linkage mechanism.

13: and rotating the shaft.

14: a support frame.

18: a first arm.

19: a second arm.

20: a connecting member.

35: and detecting the sensor.

35A: and detecting the action part.

36: the body is detected.

37: and (4) a bracket.

Detailed Description

Next, a case where an embodiment of the work vehicle of the present invention is applied to a semi-feeding type combine as an example of the work vehicle will be described with reference to the drawings. In this embodiment, a direction indicated by reference numeral F in fig. 1 is a front side of the machine body, a direction indicated by reference numeral B in fig. 1 is a rear side of the machine body, a direction indicated by reference numeral L in fig. 2 and 3 is a left side of the machine body, a direction indicated by reference numeral R in fig. 2 and 3 is a right side of the machine body, a direction indicated by reference numeral U in fig. 1 and 2 is an upper side, and a direction indicated by reference numeral D in fig. 1 and 2 is a lower side.

A semi-feeding type combine harvester as an example of the working vehicle of the present invention has a known structure, and therefore, a harvesting portion for harvesting crops in a field is provided in a front portion of a traveling machine body, and a driving portion is provided behind the harvesting portion. The rear part of the machine body is provided with a threshing device and a grain box in a transverse arrangement state.

The traveling machine body includes an engine E, left and right traveling devices 2L and 2R, and a transmission case 1 (see fig. 2) for transmitting power from the engine E to the left and right traveling devices 2L and 2R by changing the speed. The traveling devices 2L and 2R are crawler traveling devices. By driving the left and right traveling devices 2L and 2R at the same speed, the straight traveling can be performed. Then, the rotation of either one of the left and right travel devices is stopped, and the other travel device is driven, thereby enabling the vehicle to rotationally travel in the right or left direction.

(brake operation structure of traveling machine body)

Next, a structure for performing a braking operation of the traveling machine body will be described.

As shown in fig. 1 and 2, the transmission case 1 and the left and right traveling devices 2R and 2L are provided at a position lower than the floor portion 4 of the cab 3. The transmission case 1 has: a left friction brake device 5L capable of braking a relay transmission shaft (not shown) located in the middle of a power transmission path for transmitting power to the left travel device 2L; and a right friction brake device 5R capable of braking a relay transmission shaft (not shown) located in the middle of a power transmission path through which power is transmitted to the right travel device 2R.

The brake mechanism 6 for braking the traveling devices 2R and 2L includes: a first brake mechanism 6L that operates the left friction brake device 5L to apply a braking action to the left travel device 2L; and a second brake mechanism 6R that operates the right friction brake device 5R to apply a braking action to the right travel device 2R.

The first brake mechanism 6L includes: a first operation arm 7L that is switched to a braking state by a swing operation; and a first operation shaft 8L that swings and rotates by the first operation arm 7L. When the first operation shaft 8L rotates, the left friction brake device 5L is switched to the braking state.

The second brake mechanism 6R includes: a second operation arm 7R switched to a braking state by a swing operation; and a second operation shaft 8R that swings and rotates via the second operation arm 7R. When the second operation shaft 8R rotates, the right friction brake device 5R is switched to the braking state.

The first brake mechanism 6L and the second brake mechanism 6R are supported by a front side wall 1A of the transmission case 1, which is a front side member of the transmission case 1. A pressing roller 9 as a pressing member that simultaneously operates the first operation arm 7L and the second operation arm 7R is disposed at an intersection where the first operation arm 7L and the second operation arm 7R intersect.

A brake pedal 10 that operates the first brake mechanism 6L and the second brake mechanism 6R is provided above the floor portion 4 of the driver portion 3. The brake pedal 10 is provided in a state of being displaced from the first brake mechanism 6L and the second brake mechanism 6R in the right and left direction of the machine body. The brake pedal 10 is further provided with a link mechanism 11 which is linked to the first brake mechanism 6L and the second brake mechanism 6R in an interlocking manner. The link mechanism 11 passes through a position lower than the floor portion 4. Specifically, the link mechanism 11 links the brake pedal 10 and the pressing roller 9. The link mechanism 11 is a mechanical coupling mechanism that does not use a wire.

When the brake pedal 10 is depressed, the pressing roller 9 simultaneously presses the left and right operation arms 7L and 7R to switch the left and right first brake mechanisms 6L and the second brake mechanisms 6R to the braking state, and the left and right travel devices 2L and 2R are both in the braking state. A locking holder 12 with a lever is provided near the brake pedal 10 to hold the position of the brake pedal 10 in a depressed state. When the brake pedal 10 is held in position by the engagement holder 12 in a state of being depressed, the braking state can be maintained even if the depressing operation of the brake pedal 10 is released.

The link mechanism 11 will be explained below.

As shown in fig. 1 to 3, a pivot shaft 13 extending in the left-right direction of the body is provided at a position closer to the rear side of the body than the brake pedal 10 and lower than the floor portion 4 of the driver portion 3. The brake pedal 10 is supported so as to be capable of swinging up and down about the axis of the rotating shaft 13. The rotation shaft 13 is supported at both ends in the axial direction. The right end of the turning shaft 13 is turnably supported by a floor support frame 14 of the floor 4 supporting the cab 3 via a turning sleeve 15. The left end of the rotating shaft 13 is rotatably supported by the panel support frame 16 via a rotating sleeve 17. The panel support frame 16 is a frame that supports a side panel (not shown) provided on the lateral side of the driver seat in the driver section 3.

There is also a first arm 18 connecting the rotating shaft 13 and the brake pedal 10. As shown in fig. 1, the first arm 18 is formed in a substantially L-shape in side view. The first arm 18 has: a longitudinal connecting body 18A connected to the brake pedal 10 and extending in the longitudinal direction; and a lateral connecting body 18B connecting a lower end portion of the longitudinal connecting body 18A and the rotation shaft 13.

There is also a second arm 19 extending parallel to the first arm 18. The second arm 19 and the first arm 18 are coupled to the pivot shaft 13 at a position separated in the left-right direction. The second arm 19 is shorter than the first arm 18 and extends from the rotation shaft 13 to a position halfway along the first arm 18. Further, a connecting member 20 is provided for connecting the middle portion of the first arm 18 and the free end of the second arm 19. The first arm 18, the pivot shaft 13, the second arm 19, and the connecting member 20 are integrally connected to each other in a rectangular frame shape by welding.

A bracket 21 having a substantially U-shape in plan view is coupled to the coupling member 20 at a position opposite (front side) to the position where the second arm 19 is coupled. The bracket 21 has lateral shaft members 22 inserted through both left and right side portions thereof. The shaft member 22 projects leftward from the bracket 21. The rod 23 extends in the longitudinal direction in a state of passing through the projecting portion of the shaft member 22 up and down.

A screw portion is formed on the outer periphery of the rod 23, and a retaining nut 24 is attached to the rod 23 at a position above the shaft member 22. A coil spring 25 is fitted around a portion of the rod 23 below the shaft member 22. A nut 26 for receiving the coil spring 25 is attached to a portion of the rod 23 below the coil spring 25.

A roller support member 27 is connected to the lower end of the rod 23. The roller support member 27 is formed in a substantially L-shape when viewed in the front-rear direction, and has a laterally extending portion 27A extending in the left-right direction and a vertically extending portion 27B extending in the up-down direction. The rod 23 is integrally connected to the right end of the extending portion 27A by welding. The lower end of the extending portion 27B is connected and supported to the pressing roller 9 so as to be rotatable around the axis in the front-rear direction.

The roller support member 27 corresponds to a lateral coupling member that displaces the coupling portion between the lever 23 and the pressing roller 9 in the left-right direction.

The roller support member 27 displaces the connecting portion between the lever 23 and the pressing roller 9 to the left and right. That is, the connection portion with the pressure roller 9 is shifted to the left and right with respect to the connection portion with the lever 23. By the above-described misalignment, even if the frame body of the straw conveying portion located on the left side of the cab 3 is close to the frame body, interference with the link mechanism can be avoided.

The hydraulic unit 28 is provided on the upper side of the front side wall 1A of the transmission case 1 at a location where the first brake mechanism 6L and the second brake mechanism 6R are provided. The hydraulic unit 28 has left and right hydraulic cylinders 29L, 29R that are vertically extendable and retractable, and can brake the first brake mechanism 6L and the second brake mechanism 6R, respectively. The hydraulic unit 28 can be used for rotating the machine body.

The hydraulic unit 28 includes a slide support portion 30 that slidably guides the vertically extending portion 27B in the vertical direction. The slide support portion 30 is formed of a plate body in a horizontal posture, and is formed with an insertion hole through which the vertically extending portion 27B can be inserted.

A spring receiving member 31 is provided at the right end of the rotating shaft 13 so as to be integrally rotatable. A return spring 32 for rotationally biasing the rotary shaft 13 is locked to a free end portion of the spring receiving member 31. The other end of the return spring 32 is locked to the lower spring seat member 33.

The floor support frame 14 has a regulating member 34 on a side surface thereof for receiving the first arm 18 against the biasing force of the return spring 32 and regulating the position thereof. When the first arm 18 is received by the restricting member 34, the brake pedal 10 is held in the operation waiting position.

When the brake pedal 10 is depressed against the biasing force of the return spring 32, the shaft member 22 presses the lever 23 downward via the coil spring 25, and the roller support member 27 moves downward together with the pressing roller 9. Thus, the pressing roller 9 presses the first operating arm 7L and the second operating arm 7R downward by pressing them together, and the first brake mechanism 6L and the second brake mechanism 6R are both brought into a brake applied state. When the brake pedal 10 is held in position by the engagement holder 12, the braking state can be maintained even if the depressing operation of the brake pedal 10 is released.

(detection sensor)

The brake pedal 10 is also provided with a detection sensor 35 for detecting the depression of the brake pedal. The rotary shaft 13 has a detection body 36 as a detection target of the detection sensor 35. A detector 36 is provided at a position closer to the axial end of the rotating shaft 13. Specifically, the detecting body 36 is provided at a position closer to the axial end of the rotating shaft 13 on the side where the brake pedal 10 is present.

The detecting body 36 is provided below the floor portion 4 and at a position distant from the floor portion 4. The detection sensor 35 is supported by the floor support frame 14 via a bracket 37. The bracket 37 is bent into a substantially L-shape, and a horizontal surface portion 37a is placed on and bolted to the upper surface of the floor support frame 14. The horizontal plane portion 37a extends leftward, and a vertical surface 37b extending in the vertical direction is formed on the left front side portion. A detection sensor 35 is supported at the lower end of the longitudinal surface 37 b.

The detection sensor 35 has a detection operation portion 35A in a state of protruding forward. A detection body 36 made of a plate-like body is provided at a position facing the front side of the detection action portion 35A. The detector 36 is welded and fixed to the outer peripheral surface of the rotating shaft 13 on the front side in an integrally rotating state. The detector 36 is provided on the left side of the rotating shaft 13 near the first arm 18. The detection sensor 35 is of a push operation type that performs a detection operation in response to the detection operation performed by the detection operation unit 35A on the basis of the detection object 36.

When the brake pedal 10 is depressed, the detector 36 rotates to press the detection operation portion 35A of the detection sensor 35. When the detection sensor 35 detects that the brake pedal 10 is depressed, the engine E can be started, and when the depression is not detected, the start of the engine E is restricted.

(other embodiments)

(1) In the above embodiment, the detection body 36 is provided at a position closer to the axial end portion of the side of the rotating shaft 13 where the brake pedal 10 is present, but instead of this configuration, the detection body 36 may be provided at a position closer to the axial end portion of the rotating shaft 13 opposite to the side where the brake pedal 10 is present.

(2) In the above embodiment, the detection sensor 35 is of a press operation type that performs a detection operation in response to the detection action of the detection body 36 being pressed by the detection action portion 35A, and instead of this configuration, various types of detection sensors such as an optical detection sensor and a magnetic detection sensor may be used.

(3) In the above embodiment, the detection body 36 is provided below the floor portion 4 and at a position distant from the floor portion 4, but instead of this configuration, the detection body 36 may be provided below the floor portion 4 and at a position close to the floor portion 4, or the detection body 36 may be provided below a side panel provided at a lateral side portion of the cab and at a position distant from the floor portion 4.

(4) In the above embodiment, the detection sensor 35 is supported by the floor support frame 14 via the bracket 37, but instead of this configuration, the detection sensor 35 may be supported by the panel support frame 16 or another support member.

(5) In the above embodiment, the link mechanism 11 has the first arm 18, the second arm 19, and the connecting member 20 connecting the middle portion of the first arm 18 and the free end portion of the second arm 19 and is connected to the lever 23, but instead of this configuration, the link mechanism 11 may have only the first arm 18 and the second arm 19 and is connected to the lever 23, or the link mechanism 11 may have only the first arm 18 and is connected to the lever 23.

(6) In the above embodiment, the first brake mechanism 6L and the second brake mechanism 6R are provided as the brake mechanisms, but instead of this configuration, only 1 brake mechanism may be provided.

(7) In the above embodiment, the brake pedal 10 is supported by the vertical connecting body 18A inserted into the floor portion 4, but instead of this configuration, it may be supported by a swing arm having a swing fulcrum at a position above the brake pedal 10.

(8) In the above embodiments, examples of application to a half-feed type combine harvester are shown, and the present invention can be applied to a general type combine harvester as well. The present invention is not limited to the combine harvester, and can be applied to various working vehicles such as tractors and rice transplanters.

(availability in industry)

The utility model can be applied to combine harvesters, tractors, rice transplanters and other operation vehicles.

Claims (8)

1. A working vehicle is characterized in that,

comprising: a driving section;

a traveling device provided at a position lower than a floor portion of the driver section;

a brake mechanism that brakes the travel device;

a brake pedal disposed on a floor portion of the driving portion, the brake pedal operating the brake mechanism;

a link mechanism that links the brake pedal and the brake mechanism via a position lower than the floor portion; and

a detection sensor for detecting the stepping condition of the brake pedal,

the brake pedal and the brake mechanism are arranged in a state of being staggered in the left and right direction of the machine body,

the link mechanism has a rotating shaft extending in the left-right direction of the machine body at a position lower than the floor portion,

the rotating shaft has a detection body as a detection target of the sensor.

2. The work vehicle of claim 1,

the end parts of both sides of the rotating shaft in the axial direction are supported,

the detection body is provided at a portion of the rotating shaft near an end in an axial direction.

3. The work vehicle of claim 2,

the detection body is provided at a portion near an end in an axial direction of the rotation shaft on a side where the brake pedal is present.

4. The work vehicle according to any one of claims 1 to 3,

the detection sensor is of a press operation type in which a detection operation is performed by a detection operation part being pressed by the detection body,

the detection body is composed of a plate-shaped body.

5. The work vehicle according to any one of claims 1 to 3,

the detection sensor is supported by a support frame supporting the floor portion via a bracket.

6. The work vehicle according to any one of claims 1 to 3,

the link mechanism has: a first arm connecting the rotating shaft and the brake pedal; a second arm coupled to the pivot shaft at a position offset in the left-right direction from the first arm, and extending parallel to the first arm; and a connecting member that connects a middle portion of the first arm and a free end side of the second arm.

7. The work vehicle according to any one of claims 1 to 3,

the detection sensor is disposed at a position below the floor portion and away from the floor portion.

8. The work vehicle according to any one of claims 1 to 3,

a side panel is provided on the lateral side of the driving part,

the detection sensor is arranged at a position which is under the side panel and far away from the floor part.

Images