JPH0671947U - Brake and diff lock interlocking device - Google Patents

Abstract

(57) [Abstract] [Purpose] In a configuration in which a diff lock device and a traveling brake device are provided in a traveling vehicle, one wheel does not slip or the brake does not work when braking. In a transmission equipped with a diff device D equipped with a diff lock device and a brake device, a brake fork 27 is pivotally supported on a brake operating shaft of the brake device, and the brake fork 27 is engaged with a diff lock slider 12 for operating the diff lock. At the same time, a cam mechanism for sliding the brake fork 27 in the diff lock direction is provided between the brake operation shaft and the brake fork 27 when braking by rotating the brake operation shaft.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a structure for interlocking a diff lock device and a brake device provided in a diff device in a transmission of a traveling vehicle.

[0002]

[Prior art]

 Conventionally, the power after shifting by the transmission in the transmission case is transmitted to the axle via the diff device to drive the vehicle, and a braking device is provided on the left and right axles or at the front stage of the diff device for braking the traveling drive. It is provided. In addition, in order to improve straightness and prevent one drive wheel from idling due to muddyness, a diff lock device is provided on the diff device so that the left and right axles rotate integrally. There is.

[0003]

[Problems to be solved by the device]

 In such a traveling vehicle, when brake devices are provided on the left and right axles, it is set so that when the brake pedal is stepped on, the left and right brake devices are simultaneously braked. The effect of the left and right brakes will become different as the usage time becomes longer due to the extension and error of the link and wire from the brake system to the brake device.If the left and right brake devices are not adjusted appropriately, it will be one-sided effect. Braking becomes unstable. Also, when the brake device is installed on the power transmission brake in the preceding stage of the diff device other than the axle, the diff device differentially slips and the vehicle body rotates when it is controlled. is there.

[0004]

[Means for Solving the Problems]

 The problem to be solved by the present invention is as described above. Next, the means for solving the problem will be described. That is, in a transmission equipped with a diff device equipped with a diff lock device and a brake device, a brake fork is pivotally supported on a brake operation shaft of the brake device, and the brake fork is engaged with a diff lock slider that operates a diff lock. At the same time, a cam mechanism is provided between the brake operating shaft and the brake fork that slides the brake fork in the diff lock direction during braking by rotating the brake operating shaft.

[0005]

[Action]

 With this configuration, the brake fork 27 slides the diff lock slider 12 by the rotation of the brake operating shaft 25, the diff lock device operates simultaneously with the braking, and the axles 10L and 10R are integrally braked. Therefore, the one-sided effect is prevented.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a rear sectional view of a diff device in a transmission case in which a diff lock device and a brake device of the present invention are interlocked, FIG. 2 is a rear sectional view of the same second embodiment, and FIG. 3 is a third embodiment of the same. 4 is a side sectional view of the differential lock fork and the brake fork, FIG. 5 is a side sectional view of the differential lock fork fitting portion, and FIG. 6 is a conventional sectional view of the same.

The power transmitted from the engine or the like to an input shaft (not shown) inserted in the transmission case 1 is transmitted to the center gear 2 after being changed in speed by the transmission device, and transmitted from the center gear 2 to the axle device 10L via the differential device D.・ The wheels are driven by being transmitted to 10R. As shown in FIG. 1, the center gear 2 is meshed with a ring gear 3 of a diff device D. The diff device D has a ring gear 3 fixed around the center of a diff case 4 so that both sides rotate to the transmission case 1. Axle shafts 10L and 10R are inserted from both sides of the differential case 4 and side pinions 5L and 5R are externally fitted inside the differential case 4, and the differential shaft is orthogonal to the axle shafts 10L and 10R and inside the differential case 4. 6 is fixed, differential pinions 7a and 7b are rotatably fitted on both sides of the differential shaft 6, and the differential pinions 7a and 7b are meshed with the side pinions 5L and 5R.

The diff lock device is configured as follows. That is, the lock pin 11 is inserted into the differential case 4, the tip of the lock pin 11 is arranged so that it can be inserted into the fitting groove 5a of the side pinion 5R, and the other end of the lock pin 11 is fixed to the diff lock slider 12. The differential lock slider 12 is slidably fitted onto the boss portion 4a of the differential case 4, and the tip of the differential lock fork 13 is fitted into the groove of the differential lock slider 12. The boss portion 13a of the diff lock fork 13 is slidably fitted on the diff lock operating shaft 14, and a pin 16 is penetrated through the diff lock operating shaft 14, and the pin 16 is a V-shaped member provided on the boss portion 13a of the diff lock fork 13. It is fitted in the notch 13b. A return spring 16a is interposed between the side wall of the mission case 1 and the diff lock fork 13, and one end of the diff lock operation shaft 14 is projected to the outside of the mission case 1 to fix the diff lock lever 15.

Therefore, when the diff lock lever 15 is rotated during straight traveling, the pin 16 is rotated along the notch 13b, and the diff lock fork 13 slides leftward on the paper surface by the reaction thereof, so that the diff lock slider 12 is moved. The lock pin 11 is slid and inserted into the fitting groove 5a of the side pinion 5R, and the diff lock device operates.

As shown in FIG. 5, the tip of the diff lock fork 13 is formed in a C shape and is fitted into the groove of the diff lock slider 12, and the abutting portion 13 c of the diff lock fork 13 and the diff lock slider 12 are fitted together. The gap between them is larger on the inside than on the outside, so that the resistance during operation is small. That is, conventionally, as shown in FIG. 6, the contact portion 13c ″ is formed into an arc which is substantially concentric with the axis of the axle 10. Therefore, when the diff lock lever is operated, the diff lock operating shaft 14 ″ is operated. Is rotated and the tip end contacts the diff lock slider 12 ″ and the rotation of the diff lock slider 12 ″ is opposite to the rotation of the diff lock operating shaft 14 ″, the reverse servo occurs and the resistance increases. As a result, the operating force increases. Therefore, in the present embodiment, when the differential lock operating shaft 14 is rotated, the inside of the contact portion 13c contacts the differential lock slider 12, so that the reverse servo force does not work. The operating force does not increase so much.

Next, the friction plates 20, 20, ... Are spline-fitted to the axles 10L, 10R, the friction plates 22, 22, ... Are locked to the transmission case 1, and the friction plates 20, 2. It is arranged alternately with 2. A brake cam 23 and a ball 24 are arranged on the outer side of the friction plate 22, and one end of the brake cam 23 is brought into contact with the slitting portions 25a and 25a of the brake operation shafts 25L and 25R horizontally mounted on the mission case 1. . The balls 24 are held by the brake cases 21L and 21R. A brake lever 26 is fixedly installed at one end of the brake operation shaft 25 to form a brake device. When the brake lever 26 is rotated, the brake operating shafts 25L and 25R are also rotated, the brake cam 23 is also rotated, and the rotation of the brake cam 23 causes a shallow portion of a cam groove (not shown) therein. The ball 24 rides up and presses against the friction plates 20, 22 ... to brake the axles 10L, 10R.

A boss portion 27a of the brake fork 27 is externally fitted to one (25R) of the brake operating shaft 25, and a V-shaped notch portion 27b is formed in the boss portion 27a similarly to the differential lock fork 13. Then, the brake fork 27 is engaged with the pin 29 fixed through the brake operating shaft 25, the tip of the brake fork 27 is fitted to the differential lock slider 12, and the pin 29 is cut by the rotation of the brake operating shaft 25. The brake fork 27 is slid and the diff lock slider 12 is also slid so that the lock pin 11 is fitted into the side pinion 5R at the same time as the braking to perform the diff lock. The axles 10L and 10R will rotate and stop at the same time, and there will be no one-sided effect. The brake levers 26L and 26R are rotated at the same time when the brake pedal is depressed so that the left and right brakes are simultaneously applied. Further, since both forks 13 and 27 are engaged with the common diff lock slider 12, the brake fork 27 is also moved when the diff lock is operated, but the cutout portion 27b of the brake fork 27 is open on the pin 29 side, so that the brake fork 27b is not moved. The brake operation shaft 25 is not slid and the brake operation shaft 25 is not rotated, only sliding on the brake operation shaft 25R.

Further, as shown in FIG. 2, the diff lock slider 12 can be separately configured as a first diff lock slider 12 a of the diff lock fork 13 and a second diff lock slider 12 b of the brake fork 27. The degree of freedom in disposing the diff lock fork 13 and the brake fork 27 can be increased, and other configurations and actions are the same as those described above.

Further, the brake device may be provided on the power transmission shaft 31 in the front stage of the differential device D as shown in FIGS. 3 and 4 without being provided on the axle, and in this case, the center gear 2 is provided. Friction plates 20 ', 20' are provided at the end of the power transmission shaft 31, and the friction plates 22 ', the brake cams 23', and the balls 24 'are arranged between the brake case 21' and the mission case 1, and the same as above. The brake cam 23 'is brought into contact with the slit portion 25a' of the brake operating shaft 25 'so that the brake lever 26' can be rotated for braking, and the diff lock fork 13 'can be mounted on the diff lock operating shaft 14'. The front end is engaged with the differential lock slider 12 'and the brake fork 27' is disposed on the brake operating shaft 25 'with the same configuration as described above.

[0015]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects. That is, since the brake operation and the diff lock operation are linked, the diff lock device is automatically activated during braking, the two axles are integrally braked, and the slip on one axle disappears, resulting in no one-sided effect. The vehicle does not turn during braking, and it is now possible to drive safely.

[Brief description of drawings]

FIG. 1 is a rear cross-sectional view of a diff device in a mission case in which a diff lock device and a brake device of the present invention are interlocked.

FIG. 2 is a rear sectional view showing a second embodiment of the same.

FIG. 3 is a rear sectional view showing a third embodiment of the same.

FIG. 4 is a side sectional view of a differential lock fork and a brake fork.

FIG. 5 is a side sectional view of a diff lock fork fitting portion.

FIG. 6 is likewise a conventional cross-sectional view.

[Explanation of symbols]

 D differential device 1 mission case 4 differential case 10 axle 11 lock pin 12 differential lock slider 13 differential lock fork 14 differential lock operating shaft 25 brake operating shaft 27 brake fork

Claims (1)

[Scope of utility model registration request] 1. In a transmission equipped with a diff device equipped with a diff lock device and a brake device, a brake fork is pivotally supported on a brake operating shaft of the brake device, and the brake fork is engaged with a diff lock slider for operating the diff lock. At the same time, a brake and diff lock interlocking device is provided between the brake operation shaft and the brake fork, which is provided with a cam mechanism for sliding the brake fork in the diff lock direction during braking by rotating the brake operation shaft.