JPH08207822A - Steering brake device for self-traveling work machine - Google Patents

Abstract

PURPOSE: To improve assembly workability by connecting an imput gear and a multiplate type joint device via an inner member, loosely engaging rotatably an output gear with the outer periphery of the inner member, and separably connecting the joint device and the input and output gears in a shaft direction via claw clutches arranged inside and outside. CONSTITUTION: An inner member 3a and an output gear 2d are combinatively inserted in and spline-engaged with one end of an input gear 2c fixed to a main shaft 3. Then, when an outer member is supported by the main shaft 3, while the friction plate 4c of a friction joining means 4a is engaged with the inner member 3a, and successively first and second supporting members 2f and 2h are engagedly inserted in the friction plate 4c; a claw clutch 6j facilitates the joining between the output gear 2d and the pressure receiving plate 4h of the friction joining means 4a, also between the braking cylinder 6h of a parking brake 6 and the pressure receiving plate 4h of a steering baking means 4b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering brake device for a self-propelled working machine which travels on a road or a field by driving a rubber tire or a crawler wheel by an engine mounted on an agricultural tractor, a combine or the like. .

[0002]

2. Description of the Related Art Generally, a steering brake is a device that brakes one of left and right wheels or a crawler belt and changes the course to the braked side. That is, a durable multi-plate clutch type brake is attached to the transmission shaft that connects the engine to the wheels or the sprocket of the crawler belt. In addition, in order to prevent the wheels from idling on rough roads and muddy roads, it is common not to provide a permanent differential in the vehicle in the power transmission system of the working machine. In order to prevent the engine from stopping when the brakes are operated, friction transmission means that is interrupted or slips when an overload occurs is provided between the engine and the steered brakes. Furthermore, a parking brake for temporarily stopping the working machine is also necessary, and it is preferable to use a multi-plate clutch that operates smoothly for the steering brake, the friction transmission means, the parking brake, and the like. . However, in the multi-plate clutch, a friction plate engaging with the former and a friction plate engaging with the latter are alternately arranged between the inner member of the outer gear type and the outer member of the inner gear type, and they are squeezed. Since the pressure receiving plate to be released and the pressing plate are provided, the structure is extremely complicated and the assembling work is difficult, and in particular, the teeth provided on the friction plate and the inner member or the outer member are provided. Is to engage the tooth portion
The more friction plates, the more difficult it was.

[0003]

Therefore, conventionally, in order to alleviate any difficulty in assembling, the brake composed of the multi-plate clutch is assembled as much as possible as a single body, and then assembled on the main shaft, and then to the transmission case. Though considerations have been given to assembling, there was a problem in that the whole was enlarged. Also, in order to downsize these, it is necessary to use the transmission case itself as a part of the device, but for that purpose, it is necessary to mount some large parts of the main shaft and brake in the transmission case and then assemble the small parts Occurs, it is necessary to engage the friction plate and the inner member inside the transmission case, and further, the brake portion and the friction transmission portion and the input / output gear and the parking brake must be simultaneously connected. It is forced to reduce workability.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to obtain a steering brake device excellent in assemblability. The input shaft 2c is fixedly mounted at the center of the main shaft 3, and the friction coupling means 4a and the steering brake means are provided on one side and the other side adjacent to the input gear 2c. 4b, the input gear 2c and the multi-plate type joint device 4 are connected via an inner member 3a having one end connected to the input gear 2c. An output gear 2d is rotatably engaged with the outer periphery of the member 3a, and the multi-plate type joint device 4 is connected to the input gear 2c and the output gear 2d in an axially separable manner via intermeshing clutches arranged inside and outside. To a point There is a butterfly.

[0005]

First, the input gear 2c is spline-fitted on the main shaft 3, and the inner members 3a are similarly spline-fitted on both sides thereof. An output gear 2d is preliminarily rotatably fitted around the outer periphery of the inner member 3a. Next, the preassembled multi-plate joint device 4 is inserted through the main shaft 3, and the friction plates 4c and 4d forming the joint device 4 are spline-fitted to the inner member 3a.
d is also connected via the claw clutch 6j so as to be separable in the axial direction.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a power system diagram of the self-propelled work machine 1. That is, the output of the engine 1a is transmitted into the transmission case 2 by the output shaft 1b, and the main clutch 2a and the reduction gear mechanism 2 are transmitted.
b to the main shaft 3 via the input gear 2c, and branched to the output gears 2d and 2d rotatably engaged with the main shaft 3, respectively, and the multi-plate joint devices 4 and 4 and the second gear reduction mechanisms 2e and 2e, respectively.
Through the wheels 5, 5, that is, the wheels of the tires or crawler tracks. 6 is a parking brake.

As shown in FIG. 2, the main shaft 3 has a transmission case 2
Supported by. That is, the transmission case 2 has two halves, which are divided into left and right, overlapped with each other and fastened with bolts.
The main shaft 3 is rotatably supported by ball bearings 2j, 2j by a first support member 2f and a second support member 2h bolted to the transmission case 2. Spline teeth are engraved in the central portion of the main shaft 3, and an external gear-shaped inner member 3a forming a part of the multi-plate joint device 4 is splined through internal gear-shaped spline teeth formed in the inner diameter portion. Are combined. Reference numerals 2d and 2d denote output gears 2d which are rotatably engaged with the outer circumference of the inner member 3a via needle rollers.

The multi-plate joint devices 4 and 4 are provided with a friction joint means 4a for connecting the rotation of the input gear 2c to the output gear 2d and a steering brake means 4b for stopping the rotation thereof. Both means 4a, 4b are formed on the inner surface of the outer member 3b rotatably supported by the main shaft 3 via a flange. That is, the friction joint means 4a is composed of the outer member 3b, the inner member 3a in the shape of an external gear, and the friction plates 4c and 4d that engage with the inner member 3a. The friction plates 4c and 4d are used as the pressure receiving plate 4h and the pressing plate 4j. The disc spring 4e, which is a pressing means, holds the frictional engagement state through the and and keeps the frictional engagement state and slides only when the joint is overloaded.
The pressure receiving plate 4h constitutes the output side of the friction coupling means 4a, and is axially separably engaged with the output gear 2d via a pawl clutch 4k. Similarly, the steering brake means 4b frictionally engages the outer member 3b and the second supporting member 2h supported by the transmission case 2 via the friction plates 4c and 4d, and the pressure receiving plate 4h and the pressing plate 4j respectively. The rotation of the outer member 3b is stopped when the pressure is applied by the hydraulically actuated piston 4f, which is a pressing means, and is released when the piston 4f withdraws.

The parking brake 6 is provided between the transmission case 2, a second support member 2h provided to cover the opening thereof, and the outer surface of the transmission case 2. That is, transmission case 2
Between the pressure receiving surface 6a and the pressing plate 6b formed on the outer surface of the
On the transmission case 2 side, one friction plate 6c locked only for rotation and the other friction plate 6d locked on the brake cylinder 6h are arranged, and these friction plates 6c and 6d are pressed by the cam shaft 6f together with the pressing plate 6b. The brake cylinder 6h is frictionally engaged with the transmission case 2 when pressed toward the surface 6a. Cam shaft 6
As shown in FIGS. 2 and 3, f is a semi-circular cross-section formed by cutting out the cylindrical portion at the lower end of the cam shaft 6f, and friction engagement is performed when the operation lever 6e is rotated. And brake. As described above, the brake cylinder 6h is engaged with the pressure receiving plate 4h of the steering brake means 4b through the claw clutch 4j formed at the other end with the friction plate 6d being engaged with the pressure receiving plate 4h so as to be separable in the axial direction. There is.

Therefore, when the input gear 2c and the main shaft 3 are rotated by the engine, the rotation is generated by the friction transmission means 4a.
The barrel inner member 3a to the friction plates 4c and 4d and the pressure receiving plate 4
It is frictionally transmitted to the output gear 2d via h and the claw clutch 4k. For example, when the right steering brake means 4b is operated while the vehicle is traveling, hydraulic oil is supplied through the oil passage 3c, and the piston 4f, which is a pressing means, moves forward to engage the steering brake means 4b, and the outer brake The rotation of the member 3b is stopped. Therefore, as if the load of the friction coupling means 4a is increased, slippage occurs, and the relationship between the engine rotation and the wheel becomes loose, so that the speed of the output gear 2d is reduced without stopping the engine, Alternatively, stop and turn the vehicle to the right. When parking the vehicle, when the operation lever 6e is operated, the cam shaft 6f rotates to operate the parking brake 6, and the steering brake means 4b is stopped by the transmission case 2 via the pawl clutch 4j.

Next, the process of assembling the steering brake device will be described. First, the input gear 2 fixed to the main shaft 3
The inner member 3a and the output gear 2d are combined and inserted into one side of c for spline engagement. Next, the friction plate 4c of the friction joint means 4a is engaged with the inner member 3a, and the outer member is supported on the main shaft 3, and then the first member
If the support member 2f and the second support member 2h are engaged with and are inserted into the friction plate 4c, the output gear 2d and the friction joint means 4a are formed.
Between the pressure receiving plate 4h and the braking cylinder 6 of the parking brake 6
The h and the pressure receiving plate 4h of the steering braking means 4b are easily coupled by the claw clutch 6j.

[0011]

As described above, according to the present invention, the engine and the wheel are connected by using the multi-plate clutch type friction transmission means, and the wheel and the friction transmission means are braked by the steering brake means. In a steering brake, an input gear and an output gear are adjacent to each other, an output gear is loosely engaged with an inner member connected to the input gear, and a meshing clutch in which a friction transmission means, an input gear, and an output gear are formed inside and outside is provided. Since it is connected via an input gear so that both can be engaged and disengaged at the same time, the input gear and the output gear are provided adjacent to each other.
Since the multi-plate joint device is engaged on the outside so that it can be disassembled in the axial direction, there is little dead space in the overall structure and the device can be miniaturized, and its assembly workability is significantly improved. Play.

[Brief description of drawings]

FIG. 1 is a power system diagram of a self-propelled work machine.

FIG. 2 is an enlarged sectional view of a main part thereof.

FIG. 3 is an arrow view III thereof.

[Explanation of symbols]

 Input gear, input gear, output gear, spindle, 3a, inner member, 3b, outer member, 4 ... multi-plate joint device, 4a, friction transmission means, 4b, steering brake Means, 6 ... Parking brake,

[Procedure amendment]

[Submission date] May 12, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

Title: Steering brake device for self-propelled work machine

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steering brake device for a self-propelled working machine which travels on a road or a field by driving a rubber tire or a crawler wheel by an engine mounted on an agricultural tractor, a combine or the like. .

[0002]

2. Description of the Related Art Generally, a steering brake is a device that brakes one of left and right wheels or a crawler belt and changes the course to the braked side. That is, a durable multi-plate clutch type brake is attached to the transmission shaft that connects the engine to the wheels or the sprocket of the crawler belt.

Further, in order to prevent wheels from idling on a rough road or a muddy road, it is common to not provide a permanent differential in an automobile in a power transmission system of a working machine. In order to prevent the engine from stopping when the steering brake is operated, friction transmission means that is interrupted or slips at the time of overload is provided between the engine and the steering brake.

Further, a parking brake for temporarily stopping the working machine is required, and the steering brake, the friction transmission means, the parking brake and the like use a multi-plate clutch which operates smoothly. Is preferred.

However, in the multi-plate clutch, a friction plate engaging with the former and a friction plate engaging with the latter are alternately arranged between the inner member of the external gear type and the outer member of the internal gear type, and they are arranged alternately. Since the pressure receiving plate and the pressing plate for pinching and releasing are provided, the structure is extremely complicated and the assembling work is difficult. In particular, the tooth portion and the inner member provided on the friction plate or the outer member are provided. It is to engage the tooth portion provided on the member, and the difficulty increases as the number of friction plates increases.

[0006]

Therefore, conventionally, in order to alleviate any difficulty in assembling, the brake composed of the multi-plate clutch is assembled as much as possible as a single body, and then assembled on the main shaft, and then to the transmission case. Though considerations have been given to assembling, there was a problem in that the whole was enlarged. Also, in order to downsize these, it is necessary to use the transmission case itself as a part of the device, but for that purpose, it is necessary to mount some large parts of the main shaft and brake in the transmission case and then assemble the small parts Occurs, it is necessary to engage the friction plate and the inner member inside the transmission case, and further, the brake portion and the friction transmission portion and the input / output gear and the parking brake must be simultaneously connected. It is forced to reduce workability.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to obtain a steering brake device excellent in assemblability. The input shaft 2c is fixedly mounted at the center of the main shaft 3, and the friction coupling means 4a and the steering brake means are provided on one side and the other side adjacent to the input gear 2c. 4b, the input gear 2c and the multi-plate type joint device 4 are connected via an inner member 3a having one end connected to the input gear 2c. An output gear 2d is rotatably engaged with the outer periphery of the member 3a, and the multi-plate type joint device 4 is connected to the input gear 2c and the output gear 2d in an axially separable manner via intermeshing clutches arranged inside and outside. To a point There is a butterfly.

[0008]

First, the input gear 2c is spline-fitted on the main shaft 3, and the inner members 3a are similarly spline-fitted on both sides thereof. An output gear 2d is preliminarily rotatably fitted around the outer periphery of the inner member 3a. Next, when the pre-assembled multi-plate joint device 4 is inserted through the main shaft 3 and the friction plates 4c and 4d forming the joint device 4 are spline-fitted to the inner member 3a, the output gear 2d supported on the outer periphery also becomes. It is connected to be separable in the axial direction via the pawl clutch 4k.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a power system diagram of the self-propelled work machine 1. That is, the output of the engine 1a is transmitted into the transmission case 2 by the output shaft 1b, and the main clutch 2a and the reduction gear mechanism 2 are transmitted.
b to the main shaft 3 via the input gear 2c, and branched to the output gears 2d and 2d rotatably engaged with the main shaft 3, respectively, and the multi-plate joint devices 4 and 4 and the second gear reduction mechanisms 2e and 2e, respectively.
Through the wheels 5, 5, that is, the wheels of the tires or crawler tracks. 6 is a parking brake.

The main shaft 3 is, as shown in FIG.
Supported by. That is, the transmission case 2 is constructed by overlapping the two left and right halves and tightening them with bolts, and the main shaft 3 is fixed to the transmission case 2 by the first bolts.
The support members 2f and the second support member 2h allow the ball bearings 2j, 2
It is rotatably supported via j. Spline teeth are engraved in the central portion of the main bearing 3, and the outer gear-shaped inner member 3a forming a part of the multi-plate joint device 4 is inserted through the inner gear-shaped spline teeth formed in the inner diameter portion. Splined.

The multi-plate joint devices 4 and 4 are provided with a friction joint means 4a for connecting the rotation of the input gear 2c to the output gear 2d and a steering brake means 4b for stopping the rotation thereof. Both means 4a, 4b are formed on the inner surface of the outer member 3b rotatably supported by the main shaft 3 via a flange.

That is, the friction joint means 4a is composed of the outer member 3b, the inner member 3a in the form of an external gear, and the friction plates 4c and 4d engaging with the inner member 3a. Then, the friction plates 4c and 4d are pinched by the disc spring 4e as a pressing means via the pressure receiving plate 4h and the pressing plate 4j, and are kept in a state of being constantly frictionally engaged. Therefore, the power transmitted by sliding is reduced only when the joint is overloaded. The pressure receiving plate 4h constitutes the output side of the friction coupling means 4a, and is axially separably engaged with the output gear 2d via a pawl clutch 4k.

Similarly, the steering brake means 4b frictionally engages the outer member 3b and the second support member 2h supported by the transmission case 2 via the friction plates 4c and 4d. Then, the outer member 3b is stopped from rotating when it is pinched by the hydraulically actuated piston 4f which is a pressing means via the pressure receiving plate 4h and the pressing plate 4j, respectively, and is released when the piston 4f retreats.

The parking brake 6 is provided between the transmission case 2, a second support member 2 h provided to cover the opening thereof, and the outer surface of the transmission case 2. That is, transmission case 2
Between the pressure receiving surface 6a and the pressing plate 6b formed on the outer surface of the
On the transmission case 2 side, one friction plate 6c locked only for rotation and the other friction plate 6d locked on the brake cylinder 6h are arranged, and these friction plates 6c and 6d are pressed by the cam shaft 6f together with the pressing plate 6b. The brake cylinder 6h is frictionally engaged with the transmission case 2 when pressed toward the surface 6a. Cam shaft 6
As shown in FIGS. 2 and 3, f is a semi-circular cross-section formed by cutting out the cylindrical portion at the lower end of the cam shaft 6f, and friction engagement is performed when the operation lever 6e is rotated. And brake. As described above, the brake cylinder 6h is engaged with the pressure receiving plate 4h of the steering brake means 4b through the claw clutch 4j formed at the other end with the friction plate 6d being engaged with the pressure receiving plate 4h so as to be separable in the axial direction. There is.

Therefore, when the input gear 2c and the main shaft 3 are rotated by the engine, the rotation is generated by the friction transmission means 4a.
The barrel inner member 3a to the friction plates 4c and 4d and the pressure receiving plate 4
It is frictionally transmitted to the output gear 2d via h and the claw clutch 4k.

When the steering brake means 4b on the right side is operated while the vehicle is traveling, hydraulic oil is supplied through the oil passage 3c, and the piston 4f as a pressing means moves forward to engage the steering brake means 4b. Then, the rotation of the outer member 3b is stopped. Therefore, as if the load of the friction coupling means 4a is increased, slippage occurs, and the relationship between the engine rotation and the wheel becomes loose, so that the speed of the output gear 2d is reduced without stopping the engine, Alternatively, stop and turn the vehicle to the right.

When the vehicle is parked, when the operation lever 6e is operated, the cam shaft 6f rotates to operate the parking brake 6, and the steering brake means 4b via the pawl clutch 6j.
Is stopped by transmission case 2.

Next, a process of assembling the steering brake device will be described. First, the input gear 2 fixed to the main shaft 3
The inner member 3a and the output gear 2d are combined and inserted into one side of c for spline engagement. Next, the friction plate 4c of the friction joint means 4a is engaged with the inner member 3a, and the outer member is supported on the main shaft 3, and then the first member
If the support member 2f and the second support member 2h are engaged with and are inserted into the friction plate 4c, the output gear 2d and the friction joint means 4a are formed.
Between the pressure receiving plate 4h and the braking cylinder 6 of the parking brake 6
The h and the pressure receiving plate 4h of the steering braking means 4b are easily coupled by the claw clutch 6j.

[0019]

As described above, according to the present invention, the engine and the wheel are connected by using the multi-plate clutch type friction transmission means, and the wheel and the friction transmission means are braked by the steering brake means. In a steering brake, an input gear and an output gear are adjacent to each other, an output gear is loosely engaged with an inner member connected to the input gear, and a meshing clutch in which a friction transmission means, an input gear, and an output gear are formed inside and outside is provided. Since it is connected via an input gear so that both can be engaged and disengaged at the same time, the input gear and the output gear are provided adjacent to each other.
Since the multi-plate joint device is engaged on the outside so that it can be disassembled in the axial direction, there is little dead space in the overall structure and the device can be miniaturized, and its assembly workability is significantly improved. Play.

[Brief description of drawings]

FIG. 1 is a power system diagram of a self-propelled work machine.

FIG. 2 is an enlarged sectional view of a main part thereof.

FIG. 3 is an arrow view III thereof.

[Explanation of Codes] 2c ... Input gear, 2d ... Output gear, 3 ... Main shaft, 3a ... Inner member, 3b ... Outer member, 4 ... Multi-plate joint device, 4a. ..Friction transmission means, 4b ... Steering brake means, 6 ... Parking brake,

Claims (2)

[Claims] 1. A main shaft 3 for branching and transmitting the output of an engine to left and right wheels is supported by a transmission case 2, and an input gear 2c is fixed to a central portion of the main shaft 3, and is adjacent to the input gear 2c. In a self-propelled working machine in which a multi-plate type joint device 4 including a friction coupling means 4a and a steering brake means 4b is disposed on one side and the other side, the input gear 2c and the multi-plate type joint device 4 are input at one end. Inner member 3 connected to gear 2c
a, the output gear 2d is rotatably engaged with the outer periphery of the inner member 3a, and the meshing clutch in which the multi-plate type joint device 4 and the input gear 2c and the output gear 2d are arranged inside and outside. A steering brake device that is connected so that it can be separated in the axial direction. 2. A main shaft 3 for branching and transmitting the output of an engine to left and right wheels and a first support member 2f and a second support member 2h.
Is rotatably supported by a transmission case 2 via a shaft, an input gear 2c is fixedly mounted on the center of a main shaft 3, and friction coupling means 4a is provided adjacent to the input gear 2c on one side and on the other side. In a self-propelled working machine in which a multi-plate joint device 4 including a steering brake means 4b and a steering brake means 4b is arranged, the input gear 2c and the multi-plate joint device 4 are connected via an inner member 3a connected at one end to the input gear 2c. The output gear 2d is connected rotatably to the outer periphery of the inner member 3a thereof, and the multi-plate joint device 4, the input gear 2c and the output gear 2d are axially arranged via a meshing clutch arranged inside and outside. A parking brake 6 is provided so as to be separably connected to the outside of at least one multi-plate joint device 4, and a braking cylinder 6h for connecting the parking brake 6 to the multi-plate joint device 4 is provided on the first support member 2
f and the second support member 2h are rotatably engaged with the outer periphery thereof, and the multi-plate joint device 4 and the brake cylinder 6h are engaged with each other via a clutch so as to be axially separable and connected to each other. apparatus.