Differential lock operating device
By designing a differential lock operating device including a fork shaft, a fork frame, an actuation pin, a limit pin and a return spring, the problem of cumbersome adjustment of the limit bolt in the prior art is solved, and the automatic control and limiting of the differential lock is realized, and the production efficiency is improved.
Patent Information
- Application Number
- CN202422329671.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-09-24
AI Technical Summary
In the operation of existing tractor differential locks, the adjustment length of the limit bolts is affected by the accuracy of the parts, resulting in the differential lock limit of each vehicle that needs to be checked and adjusted separately, wasting manpower and material resources and affecting production efficiency.
A differential lock control device is designed, including a fork shaft, a fork frame, an actuator pin, a limit pin and a return spring. Through the synergy of these components, precise control and limiting of the differential lock is achieved, instead of the traditional limit bolts.
The device can automatically control the combination and disconnection of the differential lock, avoiding the risk of performing pins breaking out of the chute, reducing detection and adjustment of limit bolts, saving manpower and improving production efficiency.
Smart Images
Figure CN222992068U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of differential locks, in particular to a differential lock control device. Background Technique
[0002] As a standard configuration of tractors, the main function of the differential lock is to enhance its passability. By locking the left and right half shafts of the vehicle, it ensures that the power output of both wheels is consistent and helps the vehicle get out of trouble. When one driving wheel slips, the role of the differential lock is particularly significant. It tightly locks the differential case and the half shaft, making the differential lose its differential function, so as to transfer all the torque to the driving wheel on the other side and enhance the traction of the vehicle.
[0003] Regarding the above and existing related technologies, the inventor believes that there are often the following defects: in the existing control of the tractor differential lock, the stroke limit of the differential lock is usually set with a limit bolt under the differential lock pedal. The adjustment length of the limit bolt is affected by the accuracy of the parts and is not fixed. Therefore, it is necessary to check and adjust the differential lock limit of each offline vehicle, which wastes manpower and material resources and affects production efficiency. Therefore, a differential lock control device is proposed for the above problems. Content of the Utility Model
[0004] In order to make up for the deficiencies of the prior art, the technical solution adopted by the utility model to solve its technical problems is:
[0005] A differential lock control device of the utility model includes a fork shaft and a fork frame. The fork frame is sleeved on the surface of the fork shaft. A coupling sleeve is rotatably connected to the inner surface of the fork frame. An actuating pin is fixedly connected to the inner surface of the fork shaft. A limit pin is fixedly connected to the inner surface of the fork shaft. Both the actuating pin and the limit pin are inserted into the inner surface of the fork frame. A return spring is fixedly connected to the side wall of the fork frame. The return spring is sleeved on the surface of the fork shaft. A rocker arm is fixedly connected to the surface of the fork shaft. The actuating pin drives the fork frame to move. The fork frame drives the coupling sleeve to slide. At the same time, the fork frame also drives the return spring to contract. The coupling sleeve is connected to the half shaft and the differential. By setting the whole device, the differential lock can be controlled.
[0006] Preferably, two inclined grooves are opened at a position on the surface of the fork frame close to the actuating pin. The actuating pin is inserted into the inner walls of the two inclined grooves of the fork frame. The actuating pin will move on the inner surface of the inclined groove. The opening of the inclined groove can facilitate the actuating pin to drive the fork frame to move.
[0007] Preferably, two rectangular grooves are opened at a position on the surface of the fork frame close to the limit pin. The limit pin is inserted into the inner walls of the two rectangular grooves of the fork frame. When the fork frame moves, the fork frame moves on the surface of the limit pin through the rectangular grooves. By opening the rectangular grooves, it can facilitate the fork frame to move on the surface of the limit pin.
[0008] Preferably, a protection device is provided on the surfaces of the return spring and the fork carrier. The protection device includes a cushion ring which is located on one side of the return spring. Two support bars are fixedly connected to the side wall of the cushion ring. A slide bar is slidably connected to the inner wall of the support bars. A fixed block is fixedly connected to the surface of the fork carrier near the slide bar. A positioning pin is threadedly connected to the inner walls of the slide bar and the fixed block. When the fork carrier moves, the fork carrier drives the fixed block and the slide bar to slide. The slide bar slides on the inner wall of the support bars, and the return spring presses against the side wall of the cushion ring. By providing the cushion ring, the return spring can be protected.
[0009] Preferably, a receiving groove is formed in the surface of the slide bar near the positioning pin, and the positioning pin is inserted into the inner wall of the receiving groove of the slide bar. When the positioning pin rotates, the positioning pin rotates into the inner wall of the receiving groove of the slide bar, and the formation of the receiving groove can receive the positioning pin.
[0010] Preferably, a sliding groove is formed in the surface of the support bar, and the inner wall of the sliding groove of the support bar is slidably connected to the surface of the slide bar. When the slide bar slides, the slide bar slides on the inner wall of the sliding groove of the support bar, and the formation of the sliding groove can facilitate the sliding of the slide bar on the inner wall of the support bar.
[0011] Preferably, a limiting block is fixedly connected to the surface of the slide bar, and the surface of the limiting block is slidably connected to the surface of the support bar. The limiting block slides on the surface of the support bar, and the limiting block can limit the position of the slide bar in the support bar.
[0012] The beneficial effects of the present utility model are as follows:
[0013] 1. When the rocker arm rotates clockwise by a corresponding angle under the action of an external force, the fork shaft, the actuating pin, and the limiting pin rotate by the corresponding angle synchronously. The actuating pin generates an axial force by rotating and pressing the inclined groove provided on the fork carrier, thereby pushing the fork carrier to move rightward by a corresponding distance. The engagement sleeve realizes the engagement of the differential lock under the drive of the fork carrier; after the limiting pin rotates by a certain angle with the rocker arm, it contacts one side surface of the rectangular groove provided on the fork carrier, terminating the continuous rotation of the differential lock rocker arm, and at the same time avoiding the risk that the actuating pin disengages from the inclined groove due to the excessive rotation angle of the rocker arm (if the actuating pin disengages from the inclined groove, the engagement sleeve will not be able to return under the action of the return spring, resulting in the inability to disengage the differential lock); when the rocker arm loses the external force, the fork carrier returns to the initial position under the action of the return spring. At this time, the engagement sleeve moves leftward and the differential lock disengages. By providing the whole device, it is convenient to control the whole differential lock, and at the same time, it can replace the traditional limiting bolt, reduce the detection and adjustment of the limiting bolt, thereby saving labor and increasing production efficiency.
[0014] 2. After the return spring is installed, push the spacer ring so that the spacer ring sleeves on the surface of the fork shaft. At the same time, the spacer ring will fit against the return spring. Then, pull the slide bar so that the slide bar slides on the inner wall of the chute of the support bar. When the slide bar slides, it will drive the limit block to slide. The limit block slides on the surface of the support bar. The slide bar will fit against the fixed block. Then, rotate the positioning pin into the inner walls of the slide bar and the fixed block. At the same time, the positioning pin will also be inserted into the inner wall of the storage groove. When the fork bracket moves, it will drive the slide bar, the support bar and the spacer ring to move. The slide bar slides on the inner wall of the chute. By setting up the whole device, the return spring can be protected, and at the same time, the wear of the return spring and other components can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.
[0016] Figure 1 It is a three-dimensional structural schematic diagram of a fork bracket in a differential lock control device;
[0017] Figure 2 For a differential lock control device Figure 1 Schematic diagram of the structure at position A;
[0018] Figure 3 It is a side view structural schematic diagram of a clutch sleeve in a differential lock control device;
[0019] Figure 4 It is a top view structural schematic diagram of a fork bracket in a differential lock control device;
[0020] Figure 5 For a differential lock control device Figure 4 Schematic diagram of the structure at position B.
[0021] In the figure: 1, fork shaft; 2, actuating pin; 3, limit pin; 4, return spring; 5, rocker arm; 6, fork bracket; 7, clutch sleeve; 8, inclined groove; 9, rectangular groove; 10, protection device; 101, spacer ring; 102, support bar; 103, slide bar; 104, fixed block; 105, positioning pin; 106, storage groove; 107, limit block; 108, chute. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0023] Please refer to Figures 1-5 As shown, a differential lock control device includes a fork shaft 1 and a fork holder 6. The fork holder 6 is sleeved on the surface of the fork shaft 1. A clutch sleeve 7 is rotatably connected to the inner surface of the fork holder 6. An actuating pin 2 is fixedly connected to the inner surface of the fork shaft 1. A limiting pin 3 is fixedly connected to the inner surface of the fork shaft 1. Both the actuating pin 2 and the limiting pin 3 are inserted into the inner surface of the fork holder 6. A return spring 4 is fixedly connected to the side wall of the fork holder 6. The return spring 4 is sleeved on the surface of the fork shaft 1. A rocker arm 5 is fixedly connected to the surface of the fork shaft 1. During operation, the rocker arm 5 is pushed to drive the fork shaft 1 to rotate. The fork shaft 1 drives the actuating pin 2 and the limiting pin 3 to rotate. The actuating pin 2 drives the fork holder 6 to move. The fork holder 6 drives the clutch sleeve 7 to slide. At the same time, the fork holder 6 also drives the return spring 4 to contract. The clutch sleeve 7 is connected to the half shaft and the differential. By setting up the whole device, the differential lock can be controlled.
[0024] Two inclined slots 8 are formed in the surface of the fork holder 6 near the actuating pin 2. The actuating pin 2 is inserted into the inner walls of the two inclined slots 8 of the fork holder 6. During operation, the fork shaft 1 drives the actuating pin 2 to move. The actuating pin 2 will move on the inner surface of the inclined slot 8. The formation of the inclined slot 8 facilitates the actuating pin 2 to drive the fork holder 6 to move.
[0025] Two rectangular slots 9 are formed in the surface of the fork holder 6 near the limiting pin 3. The limiting pin 3 is inserted into the inner walls of the two rectangular slots 9 of the fork holder 6. During operation, the fork holder 6 moves on the surface of the limiting pin 3 through the rectangular slots 9. By forming the rectangular slots 9, it is convenient for the fork holder 6 to move on the surface of the limiting pin 3.
[0026] A protective device 10 is provided on the surfaces of the return spring 4 and the fork support 6. The protective device 10 includes a cushion ring 101. The cushion ring 101 is located on one side of the return spring 4. Two support bars 102 are fixedly connected to the side wall of the cushion ring 101. A slide bar 103 is slidably connected to the inner wall of the support bar 102. A fixed block 104 is fixedly connected to the surface of the fork support 6 near the slide bar 103. A positioning pin 105 is threadedly connected to the inner walls of the slide bar 103 and the fixed block 104. During operation, the cushion ring 101 is pushed to sleeved on the surface of the fork shaft 1. When the cushion ring 101 moves, it will drive the support bar 102 and the slide bar 103 to slide. After the slide bar 103 fits the fixed block 104, the positioning pin 105 is rotated into the inner walls of the slide bar 103 and the fixed block 104. When the fork support 6 moves, the fork support 6 will drive the fixed block 104 and the slide bar 103 to slide. The slide bar 103 slides on the inner wall of the support bar 102, and the return spring 4 will be pressed against the side wall of the cushion ring 101. By providing the cushion ring 101, the return spring 4 can be protected.
[0027] A receiving groove 106 is provided on the surface of the slide bar 103 near the positioning pin 105. The positioning pin 105 is inserted into the inner wall of the receiving groove 106 of the slide bar 103. During operation, the positioning pin 105 is rotated into the inner wall of the receiving groove 106 of the slide bar 103. The provision of the receiving groove 106 can receive the positioning pin 105.
[0028] A sliding groove 108 is provided on the surface of the support bar 102. The inner wall of the sliding groove 108 of the support bar 102 is slidably connected to the surface of the slide bar 103. During operation, the slide bar 103 slides on the inner wall of the sliding groove 108 of the support bar 102. The provision of the sliding groove 108 can facilitate the sliding of the slide bar 103 on the inner wall of the support bar 102.
[0029] A limiting block 107 is fixedly connected to the surface of the slide bar 103. The surface of the limiting block 107 is slidably connected to the surface of the support bar 102. During operation, the slide bar 103 drives the limiting block 107 to slide. The limiting block 107 slides on the surface of the support bar 102. The limiting block 107 can limit the position of the slide bar 103 within the support bar 102.
[0030] Working principle: when the rocker arm 5 rotates clockwise by a corresponding angle under the action of an external force, the fork shaft 1, the actuating pin 2, and the limit pin 3 rotate synchronously by a corresponding angle. The actuating pin 2 generates an axial force by rotating and squeezing the inclined groove 8 provided on the fork frame 6, thereby pushing the fork frame 6 to move to the right by a corresponding distance. The coupling sleeve 7 realizes the engagement of the differential lock under the drive of the fork frame 6; after the limit pin 3 rotates by a certain angle with the rocker arm 5, it contacts one side of the rectangular groove 9 provided on the fork frame 6, terminating the continuous rotation of the differential lock rocker arm 5, and at the same time avoiding the risk that the actuating pin 2 disengages from the inclined groove 8 due to the excessive rotation angle of the rocker arm 5 (if the actuating pin 2 disengages from the inclined groove 8, the coupling sleeve 7 will not be able to return to its original position through the return spring 4, resulting in the inability to disengage the differential lock); when the external force on the rocker arm 5 is lost, the fork frame 6 returns to its initial position under the action of the return spring 4. At this time, the coupling sleeve 7 moves to the left, and the differential lock is disengaged. By setting up the whole device, it is convenient to control the entire differential lock, and at the same time, it can replace the traditional limit bolt, reducing the detection and adjustment of the limit bolt, thereby saving manpower and increasing production efficiency; after the return spring 4 is installed, push the spacer ring 101 so that the spacer ring 101 sleeves on the surface of the fork shaft 1. At the same time, the spacer ring 101 will fit against the return spring 4. Then pull the slide bar 103 so that the slide bar 103 slides on the inner wall of the chute 108 of the support bar 102. When the slide bar 103 slides, it will drive the limit block 107 to slide. The limit block 107 slides on the surface of the support bar 102. The slide bar 103 will fit against the fixed block 104. Then rotate the positioning pin 105 into the inner walls of the slide bar 103 and the fixed block 104. At the same time, the positioning pin 105 will also be inserted into the inner wall of the receiving groove 106. When the fork frame 6 moves, it will drive the slide bar 103, the support bar 102, and the spacer ring 101 to move. The slide bar 103 slides on the inner wall of the chute 108. By setting up the whole device, the return spring 4 can be protected, and at the same time, the wear of the return spring 4 and other components can be reduced.
[0031] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.
[0032] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.
Claims
1. A differential lock operating device, comprising a fork shaft (1) and a fork frame (6), characterized in that: The fork frame (6) is sleeved on the surface of the fork shaft (1); the inner surface of the fork frame (6) is rotatably connected to a coupling sleeve (7); the inner surface of the fork shaft (1) is fixedly connected to an execution pin (2); the inner surface of the fork shaft (1) is fixedly connected to a limit pin (3); the execution pin (2) and the limit pin (3) are both inserted into the inner surface of the fork frame (6); the side wall of the fork frame (6) is fixedly connected to a return spring (4); the return spring (4) is sleeved on the surface of the fork shaft (1); and the surface of the fork shaft (1) is fixedly connected to a rocker arm (5).
2. A differential lock operating device according to claim 1, characterized in that: Two oblique grooves (8) are provided on the surface of the shift fork frame (6) near the actuating pin (2), and the actuating pin (2) is inserted into the inner walls of the two oblique grooves (8) of the shift fork frame (6).
3. A differential lock operating device according to claim 2, characterized in that: Two rectangular grooves (9) are provided on the surface of the shift fork frame (6) near the limit pin (3), and the limit pin (3) is inserted into the inner walls of the two rectangular grooves (9) of the shift fork frame (6).
4. A differential lock operating device according to claim 1, characterized in that: The surfaces of the return spring (4) and the shift fork frame (6) are provided with a protective device (10), the protective device (10) comprising a gasket (101), the gasket (101) being located on one side of the return spring (4), the side wall of the gasket (101) being fixedly connected to two support bars (102), the inner wall of the support bar (102) being slidably connected to a slide bar (103), the surface of the shift fork frame (6) being fixedly connected to a fixed block (104) at a position close to the slide bar (103), the inner walls of the slide bar (103) and the fixed block (104) being threadedly connected to positioning pins (105).
5. A differential lock operating device according to claim 4, characterized in that: A receiving groove (106) is provided on the surface of the slide bar (103) at a position close to the positioning pin (105), and the positioning pin (105) is inserted into the inner wall of the receiving groove (106) of the slide bar (103).
6. A differential lock operating device according to claim 4, characterized in that: A sliding groove (108) is provided on the surface of the support bar (102), and the inner wall of the sliding groove (108) of the support bar (102) is slidably connected to the surface of the sliding bar (103).
7. A differential lock operating device according to claim 4, characterized in that: The surface of the slide bar (103) is fixedly connected to a limiting block (107), and the surface of the limiting block (107) is slidably connected to the surface of the support bar (102).