JP2014065372A - Brake operation device of work vehicle - Google Patents

Abstract

An object of the present invention is to facilitate a brake pedal operation and a parking brake lever operation with a single brake rod, and to reduce the number of parts by simplifying the structure.
The present invention is linked to the movement of a first swing arm 11 that swings and displaces around an axis 10 in conjunction with the depression of a brake pedal 7, and a parking arm 17 that swings by operating a parking brake lever 15. Then, the second swing arm 12 that swings and displaces around the shaft core 18 and the brake arm 14 that brakes the brake device of the vehicle are interlocked and connected by a single brake rod 13. Further, on the front side of the first oscillating arm 11 and the second oscillating arm 12, an adjusting means 22 capable of adjusting the brake rod 13 from the front side of the machine body is provided. The brake pedal 7 and the parking arm 17 are set on the same axis.
[Selection] Figure 2

Description

  The present invention relates to a brake operation device for a work vehicle.

  Conventionally, generally, a brake rod for a brake pedal and a brake rod for a parking brake lever are separately provided (see, for example, Patent Document 1).

JP 2008-273367 A

The conventional configuration has a problem that the number of parts is large and the structure is complicated, such as requiring two brake rods.
SUMMARY OF THE INVENTION An object of the present invention is to provide a brake operating device for a work vehicle that facilitates brake pedal operation and parking brake lever operation with a single brake rod, reduces the number of parts by simplifying the structure, and can be implemented at low cost.

In order to solve the above problems, the present invention has taken the following technical means.
That is, according to the present invention, the first swing arm (11) that swings and displaces around the shaft core (10) in conjunction with the depression of the brake pedal (7), and the parking brake lever (15). A second swing arm (12) that swings and displaces around the shaft core (18) in conjunction with the movement of the parking arm (17) that swings by operation, and a brake arm (14) that brakes the brake device of the vehicle. One brake rod (13) is interlocked and connected.

  When the brake pedal (7) is depressed, the vehicle braking device is actuated via the first swing arm (11), the brake rod (13), and the brake arm (14) to brake the left and right rear wheels.

  When the parking brake lever (15) is pulled up, the vehicle braking device is actuated and braked via the parking arm (17), the second swing arm (12), the brake rod (13), and the brake arm (14). The

Since the parking brake brake rod and the brake pedal brake rod can be used in common, the number of parts can be reduced and it can be implemented at low cost.
According to a second aspect of the present invention, in the first aspect, the braking adjustment of the brake rod (13) is performed on the front side of the first swing arm (11) and the second swing arm (12) from the front side of the machine body. Possible adjustment means (22) are provided.

By bringing the brake adjustment point to the front side, it is possible to work in a wide space from the front of the fuselage and to easily adjust the brake.
According to a third aspect of the present invention, in the first or second aspect, the brake pedal (7) and the parking arm (17) are set on the same axis.

  Since the brake pedal shaft (10) can be shared with the parking arm shaft (18), the number of parts and the weight can be reduced.

  According to the first aspect of the present invention, the brake rod of the parking brake and the brake rod of the brake pedal can be shared, so that the number of parts can be reduced and the operation can be performed at low cost.

  According to the second aspect of the present invention, in addition to the effect of the first aspect, the adjustment work from the front of the fuselage can be performed by bringing the adjustment point of the brake to the front side of the first and second swing arms. Easy to do.

  According to the third aspect of the present invention, in addition to the effect of the first or second aspect, the parking pedal shaft can be shared with the brake pedal shaft, so that the number of parts and the weight can be reduced. it can.

Side view of work vehicle (tractor) Side view of brake operating device Partial perspective view of the same as above Disassembled perspective view of the main part of another example of the brake operation device Side view of main part of another example of brake operation device Plan view of the main part of another example of the brake operation device Side view of the main part Perspective view of another example of brake operating device Side view of the main part Perspective view of another example of brake operating device A plan view of a partially broken main part of another example of a brake operating device Side view of main part of another example of brake operation device

An embodiment of the present invention will be described with reference to the drawings.
On the body frame 2 of the work vehicle 1, an operation column 6 having a steering handle 5 and the like for steering the left and right front wheels 3 and 3 is projected from the center of the front portion. On the left side of the operation column 6, a brake pedal 7 that brakes the left and right rear wheels 4 of the vehicle by a stepping operation is disposed and protrudes upward from the floor 8. A driver's seat 9 is installed on the rear side of the steering handle 5.

  As shown in FIG. 2, the brake pedal 7 has a structure that is pivotally supported by a brake pedal shaft 10 installed on the lower side of the floor 8 so as to be able to swing up and down. When the brake pedal is depressed, In conjunction with this operation, the first wheel swing arm 11, the brake rod 13, and the brake arm 14 that rotate together are linked to the rear wheel braking brake device, and the brake device is operated by depressing the brake pedal 7. The left and right rear wheels are braked.

  The parking arm 17 that moves up and down via the link 16 by the operation of the parking brake lever 15 is pivotally supported so that it can swing up and down with the parking arm shaft 18 as a pivot, and when the parking brake lever 15 is lifted, The parking arm 17 is lifted upward via the link 16, and the interlocking structure is configured to operate the braking device of the vehicle via the second swing arm 12, the brake rod 13, and the brake arm 14 that rotate integrally therewith. doing.

  The first and second swing arms 11 and 12 are integrally provided with dog-shaped holding plates 19 and 19 that open forward. A brake adjusting mechanism 22 including an adjusting screw portion 13 a formed on the brake rod 13, an adjustment pin 20, and a plurality of adjusting nuts 21 screwed into the adjusting screw portion is provided on the front side of the holding plates 19 and 19. ing.

  The embodiment shown in FIGS. 4 and 5 shows a configuration example in which the brake pedal 7 and the parking arm 17 are installed on the same axis. That is, by installing the parking arm 17 on the brake pedal shaft 10, the pedal shaft can share the parking arm shaft. The parking arm 17 and the parking brake lever 15 are interlocked and connected by an adjustment rod 23 that can be expanded and contracted.

  As shown in FIGS. 6 and 7, the brake rod 13 connected to the swing arm 11R of the brake pedal 7R through the connecting pin 26 and the long hole 25, out of the left and right brake pedals 7L and 7R, When the sub rod 24 connected to the swing arm 11L of the pedal 7L via the connecting pin 26 and the long hole is interlocked with the adjusting pin 20 and the brake pedal 7R is stepped on, the double nut portion 21 for adjustment comes from the pin 20. It is drawn and activated.

  The embodiment shown in FIGS. 8 and 9 will be described. The parking arm 17 is provided with a notch 27 in the hub of the parking arm 17 and is pushed by inserting the locking pin 28 into the brake pedal shaft 10 as shown in the figure. Covers the locking pin 28, and the parking arm can be locked and the pin can be prevented from coming off.

Further, in the example of FIG. 10, a notch locking portion 30 is provided in the hub 29 of the brake pedal 7, and the brake operation is performed by pressing the locking pin 28 installed on the brake pedal shaft 10.
As shown in FIG. 11, the outer pipe 31 and the inner shaft 32 have a double shaft configuration, so that the clutch pedal 33, the left and right brake pedals 7L and 7R, the parking lever, etc. can be easily supported on the same fulcrum. can do. In the figure, 34L represents the brake arm left, 34R represents the brake arm (right), 35L represents the parking arm left, and 35R represents the parking arm (right). Reference numeral 36 denotes a grease nipple, which can be circulated through all the friction portions by being disposed at the illustrated position.

In the example of FIG. 12, the rod length of the brake pedal and the two-system parking brake can be adjusted by the pedal and the parking fulcrum portion in front of the machine.
The left and right adjustment of the brake pedal is performed by the brake adjustment mechanism 22 on the front end side of the brake rod 13, and the left and right adjustment of the parking brake is configured by the brake adjustment mechanism 22 on the front end side of the parking rod 37.

  In order to establish a two-system braking system, it is preferable to provide a parking side escape play when the brake pedal is depressed and a pedal side escape (play) when parking is applied at the front fulcrum. .

3 Operation column 7 Brake pedal 10 Brake pedal shaft 11 First swing arm 12 Second swing arm 13 Brake rod 14 Brake arm 15 Parking brake lever 17 Parking arm 18 Parking arm shaft 19 Holding plate 20 Adjust pin 21 Adjustment nut 22 Brake Adjustment mechanism

Claims (3)

  Movement of the first swing arm (11) that swings and displaces around the shaft core (10) in conjunction with the depression of the brake pedal (7), and the parking arm (17) that swings by operating the parking brake lever (15) The second rocking arm (12) that rocks and displaces around the shaft core (18) in conjunction with the brake and the brake arm (14) that brakes the brake device of the vehicle are linked with a single brake rod (13). A brake operating device for a work vehicle.   An adjusting means (22) capable of adjusting the braking of the brake rod (13) from the front side of the machine body is provided on the front side of the first swing arm (11) and the second swing arm (12). The brake operation device for a work vehicle according to claim 1.   The brake operating device for a work vehicle according to claim 1 or 2, wherein the brake pedal (7) and the parking arm (17) are set on the same axis.

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