A diaphragm-actuated differential lock mechanism

Abstract

The application discloses a diaphragm-actuated differential lock mechanism, which comprises a driving mechanism, a transmission mechanism and a locking mechanism, wherein the driving mechanism comprises an axle housing, a rubber diaphragm, a gland and a fastening bolt; the transmission mechanism comprises a base, a compression spring, a push rod base, a push rod, a pin shaft and a cotter pin; and the locking mechanism comprises a rotating shaft, a control lever, a meshing block, a retaining spring, a hexagonal cylindrical end set screw and a sliding meshing sleeve; the fastening bolt is fixed to the axle housing after penetrating through bolt holes of the gland and the rubber diaphragm; the gland is provided with an air inlet joint threaded hole, and an external air passage is connected through an air pipe; and the end face of the rubber diaphragm is attached to the push rod base in the transmission mechanism. The application is convenient to operate, can effectively prevent the jamming of the pull fork shaft and the air leakage of the O-shaped ring on the pull fork shaft and the like, can effectively prevent the sliding meshing sleeve from falling off during the disassembly and assembly of the axle, and can realize the reliability, fast meshing and separation of the system under the condition of ensuring the differential locking.

Description

Technical Field

[0001] This invention relates to a differential locking mechanism, and more particularly to a diaphragm-actuated differential locking mechanism, belonging to the field of automotive drive axle technology. Background Technology

[0002] A differential lock on the drive axle is a differential with a locking function, designed to improve a vehicle's ability to traverse rough terrain. Currently, drive axle differential lock mechanisms, both domestically and internationally, typically employ a shift fork and shift fork shaft structure to achieve differential locking. The shift fork is sealed with an O-ring, which poses risks of air leakage and jamming during use. Furthermore, operating the differential lock directly pushes the shift fork and sliding engagement sleeve, requiring a significant air volume to engage and disengage the differential lock. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a diaphragm-driven differential locking mechanism that addresses the deficiencies of the existing technology, improves the reliability of the system, and enables rapid engagement and disengagement of the differential lock.

[0004] To solve this technical problem, the present invention provides a diaphragm-driven differential locking mechanism, comprising a drive mechanism, a transmission mechanism, and a locking mechanism. The drive mechanism includes an axle housing, a rubber diaphragm, a pressure cap, and fastening bolts. The transmission mechanism includes a base, a compression spring, a push rod seat, a push rod, a pin, and a cotter pin. The locking mechanism includes a rotating shaft, a control lever, a meshing block, a retaining spring, a hexagonal socket head cap set screw, and a sliding meshing sleeve. The fastening bolts pass through bolt holes in the pressure cap and the rubber diaphragm and are fixed to the axle housing. The pressure cap has a threaded hole for an air inlet connector. The air circuit is connected to the external air passage through an air tube; the end face of the rubber diaphragm and the push rod seat in the transmission mechanism are in contact with each other. When inflated, after the cavity between the rubber diaphragm and the pressure cap is inflated, the rubber diaphragm pushes the push rod seat, push rod, pin shaft and the operating lever of the locking mechanism to realize the locking power transmission. At this time, the operating lever rotates around the rotating shaft, and the sliding engagement sleeve limited by the internal hexagonal cylindrical end set screw and the operating lever is pushed by the engagement block to realize differential locking; after the differential locking is released, the operating lever and the sliding engagement sleeve are driven by the reaction of the compression spring to realize the mechanism return to the original position.

[0005] The axle housing is provided with a fastening threaded hole, a base mounting hole and a rotating shaft hole. The fastening bolt passes through the pressure cap and the rubber diaphragm in sequence and is then fixed into the fastening threaded hole on the axle housing. The rotating shaft passes through the rotating shaft hole and the round hole at the straight end of the control lever to realize the rotation function of the control lever around the rotating shaft. After inflation, the rubber diaphragm pushes the push rod seat, the push rod and the control lever to realize differential power transmission.

[0006] The bottom of the rubber diaphragm is provided with a rubber diaphragm boss, and the rubber diaphragm is positioned by fitting against the push rod seat through the rubber diaphragm boss; when the differential mechanism is locked, compressed air enters the cavity between the pressure cover and the rubber diaphragm, thereby pushing the rubber diaphragm and the push rod seat in the transmission mechanism to realize the differential locking power input.

[0007] The push rod seat has a push rod seat intermediate shaft and a push rod seat end face, and the inner hole of the push rod seat intermediate shaft is a threaded hole; the base is in the shape of a round cover, with a small through hole in the middle for the push rod and the push rod seat intermediate shaft to pass through. The base is placed on the base mounting hole of the axle housing, and the compression spring is placed inside the round cover of the base; the push rod seat end face is in contact with the rubber diaphragm and presses on the compression spring, and the push rod seat intermediate shaft passes through the compression spring and the small through hole in the middle of the round cover of the base. The push rod seat intermediate shaft is tightened with the threaded end on the push rod; when the differential lock is released, the reaction force of the compression spring realizes the rapid return of the entire differential lock mechanism.

[0008] One end of the push rod has a radial hole, which is aligned with the pin hole on the control lever and connected to the control lever via a pin and a cotter pin. The other end of the push rod has a threaded end on a round shaft, and a push rod limiting platform is provided in the middle of the push rod. After the threaded end and the threaded part on the inner hole of the push rod seat are tightened, the push rod is positioned on the base via the push rod limiting platform. The push rod seat intermediate shaft and the push rod threaded end are locked by a threaded compression return spring. The pin passes through the control lever pin hole and the push rod radial hole on the control lever and is positioned by a cotter pin. When locking the differential mechanism, the push rod transmits the power from the push rod seat to the locking mechanism to achieve differential locking.

[0009] The control lever has a Y-shaped structure. The straight end of the lever has a circular hole, and both ends of the Y end have circular holes. The middle of the lever has a groove, and the two sides of the groove have control lever pin holes that mate with the radial holes at the end of the push rod. The circular holes at the Y end of the lever have two radial threaded holes for installing hexagonal socket head cap screws. The circular hole at the straight end of the lever passes through the rotating shaft and rotates around the rotating shaft. The meshing block shaft passes into the circular hole at the Y end of the lever, and the limiting groove of the meshing block shaft and the radial threaded hole at the Y end of the lever shaft are aligned. The axial positioning and rotation functions of the meshing block are achieved by the cylinder of the head of the hexagonal socket head cap screw.

[0010] The retaining spring is designed with a V-shaped structure in the middle, and has a central V-shaped structure and two V-shaped ends. The two V-shaped ends of the retaining spring are designed with opposite V-shaped structures in the lateral direction. The two opposite V-shaped structures are inserted into the radial threaded hole of the shaft of the control lever from opposite directions. The control lever end and the central V-shaped structure of the retaining spring are locked in the slot of the sliding engagement sleeve to realize the retaining function of the sliding engagement sleeve. When the differential lock is engaged, after the push rod pushes the control lever, the engagement block rotates axially to adapt to different positions of the sliding engagement sleeve to realize the rapid engagement of the sliding engagement sleeve. When the differential lock is released, the locking mechanism can quickly return to its original position under the tension of the compression spring.

[0011] The engagement block includes an engagement block shaft, an engagement block shaft limiting groove, and an engagement block retaining block. The engagement block shaft is inserted into the circular hole at the end of the control lever. The engagement block retaining block is engaged in the sliding engagement sleeve retaining groove on the sliding engagement sleeve. The V-shaped structures at both ends of the retaining spring are inserted into the radial threaded holes at the end of the control lever shaft to achieve the positioning function of the sliding engagement sleeve. The internal hexagonal cylindrical end set screw is screwed into the radial threaded hole at the end of the shaft, and at the same time, its cylindrical head is engaged in the engagement block shaft limiting groove to achieve axial positioning and rotation of the engagement block.

[0012] Beneficial effects: This invention is easy to operate and can effectively prevent malfunctions such as jamming of the shift fork shaft and air leakage of the O-ring on the shift fork shaft. At the same time, due to the function of the retaining spring, it can effectively prevent the sliding engagement sleeve from falling off when the axle is disassembled and assembled. While ensuring the differential lock function, it realizes the reliability of the system and the rapid engagement and disengagement. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention;

[0014] Figure 2 This is a schematic diagram of the drive mechanism of the present invention;

[0015] Figure 3 This is a schematic front view of the bridge housing structure of the present invention;

[0016] Figure 4 For the present invention Figure 3 A schematic diagram of the AA cross-section;

[0017] Figure 5 For the present invention Figure 4 View from direction B;

[0018] Figure 6 This is a schematic diagram of the structure of the rubber diaphragm of the present invention;

[0019] Figure 7 For the present invention Figure 6 A schematic diagram of the CC cross-section;

[0020] Figure 8This is a schematic diagram of the transmission mechanism of the present invention;

[0021] Figure 9 This is a schematic front view of the push rod structure of the present invention;

[0022] Figure 10 This is a schematic side view of the push rod structure of the present invention;

[0023] Figure 11 This is a schematic top view of the push rod structure of the present invention;

[0024] Figure 12 This is a schematic diagram of the assembly structure of the locking mechanism of the present invention;

[0025] Figure 13 This is a schematic perspective view of the structure of the joystick of the present invention;

[0026] Figure 14 This is a schematic front view of the joystick structure of the present invention;

[0027] Figure 15 This is a schematic side view of the structure of the joystick of the present invention;

[0028] Figure 16 This is a schematic top view of the structure of the joystick of the present invention;

[0029] Figure 17 This is a schematic front view of the meshing block structure of the present invention;

[0030] Figure 18 This is a schematic side view of the meshing block structure of the present invention;

[0031] Figure 19 This is a schematic top view of the meshing block structure of the present invention;

[0032] Figure 20 This is a schematic diagram of the retaining spring of the present invention;

[0033] Figure 21 This is a schematic front view of the retaining spring structure of the present invention;

[0034] Figure 22 This is a schematic side view of the retaining spring structure of the present invention;

[0035] Figure 23 This is a schematic top view of the retaining spring structure of the present invention.

[0036] In the diagram: 1. Bridge housing; 101. Fastening threaded hole; 102. Base mounting hole; 103. Rotating shaft hole; 2. Pressure cap; 201. Inlet connector threaded hole; 3. Rubber diaphragm; 301. Rubber diaphragm boss; 4. Fastening bolt; 5. Push rod seat; 501. Push rod seat end face; 502. Push rod seat intermediate shaft; 6. Compression spring; 7. Base; 701. Base through hole; 8. Push rod; 801. Push rod radial hole; 802. Push rod threaded end; 803. Push rod limiting platform; 9. Pin; 10. Cotter pin; 11. Rotating shaft 12. Control lever; 121. Round hole at the straight end of the control lever; 122. Groove of the control lever; 123. Pin hole of the control lever; 124. Round hole at the forked end of the control lever; 125. Radial threaded hole at the shaft part of the forked end of the control lever; 13. Engaging block; 131. Shaft part of the engagement block; 132. Limiting groove of the shaft part of the engagement block; 133. Engaging block retaining block; 14. Retaining spring; 141. V-shaped structure in the middle of the retaining spring; 142. V-shaped ends at both ends of the retaining spring; 15. Set screw at the cylindrical end of the internal hexagonal socket; 16. Sliding engagement sleeve; 161. Sliding engagement sleeve retaining groove. Detailed Implementation

[0037] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] like Figures 1-23As shown, the present invention provides a diaphragm-driven differential locking mechanism, including a drive mechanism, a transmission mechanism, and a locking mechanism. The drive mechanism includes an axle housing 1, a rubber diaphragm 3, a pressure cap 2, and a fastening bolt 4, and provides a power source. The transmission mechanism includes a base 7, a compression spring 6, a push rod seat 5, a push rod 8, a pin 9, and a cotter pin 10, and actuates the differential locking. The locking mechanism includes a rotating shaft 11, a control lever 12, a meshing block 13, a retaining spring 14, a hexagonal socket head cap set screw 15, and a sliding meshing sleeve 16. The fastening bolt 4 passes through the bolt holes of the pressure cap 2 and the rubber diaphragm 3 and is fixed to the axle housing 1. The pressure cap 2 is provided with an air inlet connector threaded hole 20. 1. The external air circuit is connected through the air tube; the end faces of the rubber diaphragm 3 and the push rod seat 5 in the transmission mechanism are attached and the positioning function is achieved by the boss at the bottom of the rubber diaphragm. When inflating, compressed air enters the cavity between the rubber diaphragm 3 and the pressure cover 2. The rubber diaphragm 3 pushes the push rod seat 5, push rod 8, pin 9 and the operating lever 12 of the locking mechanism to achieve locking power transmission. At this time, the operating lever 12 rotates around the rotating shaft 11. The differential lock is achieved by the internal hexagonal cylindrical end set screw 15 and the sliding engagement sleeve 16 limited by the operating lever under the push of the engagement block 13. After the differential lock is released, the operating lever 12 and the sliding engagement sleeve 16 are driven by the reaction of the compression spring 6 to achieve the return of the mechanism. This structure is easy to operate and can effectively prevent malfunctions such as jamming of the shift fork shaft and air leakage of the O-ring on the shift fork shaft. When the axle is disassembled or assembled, it can effectively prevent the sliding engagement sleeve from falling off. At the same time, by utilizing the lever principle, it can increase the engagement thrust of the sliding engagement sleeve, achieving rapid engagement and disengagement. While ensuring the differential lock function, it realizes the system's reliability and rapid disengagement function.

[0039] The axle housing 1 is provided with a fastening threaded hole 101, a base mounting hole 102 and a rotating shaft hole 103. The fastening bolt 4 passes through the pressure cover 2 and the rubber diaphragm 3 in sequence and is fixed into the fastening threaded hole 101 on the axle housing 1. The rotating shaft 11 passes through the rotating shaft hole 103 and the round hole at the straight end of the control lever to realize the rotation function of the control lever 12 around the rotating shaft 11. After inflation, the rubber diaphragm 3 pushes the push rod seat 5, the push rod 8 and the control lever 12 to realize differential power transmission.

[0040] The bottom of the rubber diaphragm 3 is provided with a rubber diaphragm boss 301, and the rubber diaphragm 3 is positioned in contact with the push rod seat 5 through the rubber diaphragm boss 301; when the differential mechanism is locked, compressed air enters the cavity between the pressure cover 2 and the rubber diaphragm 3, thereby pushing the rubber diaphragm 3 and the push rod seat 5 in the transmission mechanism to realize the differential locking power input.

[0041] The push rod seat 5 is provided with a push rod seat intermediate shaft 502 and a push rod seat end face 501. The inner hole of the push rod seat intermediate shaft 502 is a threaded hole. The base 7 is in the shape of a round cover, with a small through hole 701 in the middle for the push rod 8 and the push rod seat intermediate shaft 502 to pass through. The base 7 is placed on the base mounting hole 102 of the axle housing 1. The compression spring 6 is placed inside the round cover of the base 7. The push rod seat end face 501 is attached to the rubber diaphragm 3 and pressed on the compression spring 6. The push rod seat intermediate shaft 502 passes through the compression spring 6 and the small through hole 701 in the middle of the round cover of the base 7. The push rod seat intermediate shaft 502 is tightened with the threaded end on the push rod 8. When the differential lock is released, the reaction force of the compression spring 6 realizes the rapid return of the entire differential lock mechanism.

[0042] One end of the push rod 8 is provided with a radial hole 801, which is aligned with the pin hole on the control lever 12 and connected to the control lever 12 through a pin 9 and a cotter pin 10. The other end of the push rod is provided with a threaded end 802 on a round shaft. The middle part of the push rod 8 is provided with a push rod limiting platform 803. After the threaded end and the threaded part on the inner hole of the push rod seat intermediate shaft 502 are tightened, the push rod is positioned on the base 7 through the push rod limiting platform 803, which can effectively prevent abnormal situations such as axial jamming of the shift fork shaft. The push rod seat intermediate shaft 502 and the push rod threaded end 802 are locked by a threaded compression return spring. The pin 9 passes through the control lever pin hole 123 and the push rod radial hole 801 on the control lever 12 and is positioned by the cotter pin 10. When locking the differential mechanism, the push rod 8 transmits the power from the push rod seat 5 to the locking mechanism to achieve differential locking.

[0043] The control lever 12 has a Y-shaped structure. The straight end of the lever has a circular hole 121, and both ends of the Y end have circular holes 124. The middle of the lever has a groove 122, and the two sides of the groove have control lever pin holes 123 that mate with the radial holes at the end of the push rod. The circular hole at the Y end of the lever has two radial threaded holes 125 for installing hexagonal socket set screws. The circular hole 121 at the straight end of the lever passes through the rotating shaft 11 and rotates around the rotating shaft 11. The meshing block shaft 131 of the meshing block 13 passes into the circular hole 124 at the Y end of the lever. At the same time, the limiting groove 132 of the meshing block shaft and the radial threaded hole 125 of the shaft of the lever are aligned. The axial positioning and rotation functions of the meshing block are achieved by the cylinder of the head of the hexagonal socket set screw 15.

[0044] The retaining spring 14 is designed with a V-shaped structure in the middle, with a central V-shaped structure 141 and two V-shaped ends 142. The two V-shaped ends 142 are designed with opposite V-shaped structures in the lateral direction. The two opposite V-shaped structures are inserted into the limiting groove 132 of the engagement block shaft and the radial threaded hole 125 of the control lever shaft from opposite directions. The control lever end and the central V-shaped structure 141 of the retaining spring are engaged in the sliding engagement sleeve groove 161 on the sliding engagement sleeve 16, realizing the retaining function of the sliding engagement sleeve 16. When the differential lock is engaged, after the push rod 8 pushes the control lever 12, the engagement block 13 rotates axially to adapt to different positions of the sliding engagement sleeve 16, realizing the rapid engagement of the sliding engagement sleeve 16. When the differential lock is released, the locking mechanism can quickly return to its original position under the tension of the compression spring 6.

[0045] The engagement block 13 includes an engagement block shaft portion 131, an engagement block shaft portion limiting groove 132, and an engagement block retaining block 133. The engagement block shaft portion 131 is inserted into the circular hole at the end of the control lever, and the engagement block retaining block 133 is engaged in the sliding engagement sleeve retaining groove 161 on the sliding engagement sleeve 16. The V-shaped structures at both ends of the retaining spring 14 are inserted into the radial threaded holes at the end of the control lever shaft to realize the positioning function of the sliding engagement sleeve. The internal hexagonal cylindrical end set screw is screwed into the radial threaded hole at the end of the shaft, and at the same time, its cylindrical head is engaged in the engagement block shaft portion limiting groove 132 to realize the axial positioning of the engagement block and realize the rotation function.

[0046] This invention is easy to operate and can effectively prevent malfunctions such as jamming of the shift fork shaft and air leakage of the O-ring on the shift fork shaft. At the same time, due to the function of the retaining spring, it can effectively prevent the sliding engagement sleeve from falling off when the axle is disassembled and assembled. While ensuring the differential lock function, it improves the reliability of the system and can realize the rapid engagement and disengagement of the differential lock.

[0047] The above embodiments of the present invention are merely illustrative examples and are not the only ones. All modifications within the scope of the present invention or equivalent to the scope of the present invention are encompassed by the present invention.

Claims

1. A diaphragm actuated differential lock mechanism characterised in that: The system includes a drive mechanism, a transmission mechanism, and a locking mechanism. The drive mechanism includes a bridge housing (1), a rubber diaphragm (3), a pressure cap (2), and fastening bolts (4). The transmission mechanism includes a base (7), a compression spring (6), a push rod seat (5), a push rod (8), a pin (9), and a cotter pin (10). The locking mechanism includes a rotating shaft (11), a control lever (12), a meshing block (13), a retaining spring (14), a hexagonal socket head cap set screw (15), and a sliding meshing sleeve (16). The fastening bolts (4) pass through the bolt holes of the pressure cap (2) and the rubber diaphragm (3) and are fixed to the bridge housing (1). The pressure cap (2) is provided with an air inlet threaded hole (201) for connecting to the air pipe. External air passage; the end faces of the rubber diaphragm (3) and the push rod seat (5) in the transmission mechanism are in contact. When the air is inflated, the cavity between the rubber diaphragm (3) and the pressure cap (2) is inflated. The rubber diaphragm (3) pushes the push rod seat (5), push rod (8), pin (9) and the operating lever (12) of the locking mechanism to realize the locking power transmission. At this time, the operating lever (12) rotates around the rotating shaft (11). The differential lock is realized by the internal hexagonal cylindrical end set screw (15) and the sliding engagement sleeve (16) of the operating lever limit under the push of the engagement block (13). After the differential lock is released, the operating lever (12) and the sliding engagement sleeve (16) are driven by the reaction of the compression spring (6) to realize the mechanism return. The retaining spring (14) is designed with a V-shaped structure in the middle, and has a V-shaped structure (141) in the middle of the retaining spring and V-shaped ends (142) at both ends of the retaining spring. The V-shaped ends (142) at both ends of the retaining spring are designed with V-shaped structures in opposite directions. The two V-shaped structures in opposite directions are inserted into the radial threaded hole (125) of the shaft of the control lever from opposite directions. The control lever and the V-shaped structure (141) in the middle of the retaining spring are locked on the sliding engagement sleeve slot (161) to realize the retaining function of the sliding engagement sleeve (16). When the differential lock is engaged, after the push rod (8) pushes the control lever (12), the engagement block (13) rotates axially to adapt to different positions of the sliding engagement sleeve (16) to realize the rapid engagement of the sliding engagement sleeve (16). When the differential lock is released, the locking mechanism can realize rapid return under the tension of the compression spring (6).

2. The diaphragm actuated differential lock mechanism of claim 1, wherein: The bridge housing (1) is provided with a fastening threaded hole (101), a base mounting hole (102) and a rotating shaft hole (103). The fastening bolt (4) passes through the pressure cap (2) and the rubber diaphragm (3) in sequence and is then fixed into the fastening threaded hole (101) on the bridge housing (1). The rotating shaft (11) passes through the rotating shaft hole (103) and the round hole (121) at the straight end of the control lever to realize the rotation function of the control lever (12) around the rotating shaft (11). After inflation, the rubber diaphragm (3) pushes the push rod seat (5), the push rod (8) and the control lever (12) to realize differential power transmission.

3. The diaphragm actuated differential lock mechanism of claim 1, wherein: The bottom of the rubber diaphragm (3) is provided with a rubber diaphragm boss (301), and the rubber diaphragm (3) is positioned in contact with the push rod seat (5) through the rubber diaphragm boss (301); when the differential mechanism is locked, compressed air enters the cavity between the pressure cover (2) and the rubber diaphragm (3), thereby pushing the rubber diaphragm (3) and the push rod seat (5) in the transmission mechanism to realize the differential locking power input.

4. The diaphragm actuated differential lock mechanism of claim 1, wherein: The push rod seat (5) is provided with a push rod seat intermediate shaft (502) and a push rod seat end face (501). The inner hole of the push rod seat intermediate shaft (502) is a threaded hole. The base (7) is in the shape of a round cover. A small through hole (701) is designed in the middle of the base for the push rod (8) and the push rod seat intermediate shaft (502) to pass through. The base (7) is placed on the base mounting hole (102) of the bridge housing (1). The compression spring (6) is placed inside the round cover of the base (7). The push rod seat end face (501) is in contact with the rubber diaphragm (3) and pressed on the compression spring (6). The push rod seat intermediate shaft (502) passes through the compression spring (6) and the small through hole (701) in the middle of the round cover of the base (7). The push rod seat intermediate shaft (502) is tightened with the threaded end on the push rod (8). When the differential lock is released, the reaction force of the compression spring (6) is used to realize the rapid return of the entire differential lock mechanism.

5. The membrane actuated differential lock mechanism of claim 1, wherein: One end of the push rod (8) is provided with a push rod radial hole (801). After the radial hole is aligned with the pin hole on the control lever (12), it is connected to the control lever (12) through the pin (9) and the cotter pin (10). The other end of the round shaft is provided with a push rod thread end (802). The middle part of the push rod (8) is provided with a push rod limiting platform (803). After the thread end and the thread on the inner hole of the push rod seat intermediate shaft (502) are tightened, they are positioned on the base (7) through the push rod limiting platform (803). The push rod seat intermediate shaft (502) and the push rod thread end (802) are locked by the thread compression return spring. The pin (9) passes through the control lever pin hole (123) and the push rod radial hole (801) on the control lever (12) and is positioned by the cotter pin (10). When locking the differential mechanism, the push rod (8) transmits the power from the push rod seat (5) to the locking mechanism to achieve differential locking.

6. The membrane actuated differential lock mechanism of claim 1, wherein: The control lever (12) has a Y-shaped structure. The straight end of the lever is machined with a circular hole (121) at the end of the lever and circular holes (124) at both ends of the Y end. The lever has a groove (122) in the middle and a pin hole (123) on both sides of the groove to cooperate with the radial hole at the end of the push rod. The circular hole at the Y end of the lever is machined radially with two radial threaded holes (125) for installing the internal hexagonal cylindrical end set screw. The circular hole (121) at the straight end of the lever passes through the rotating shaft (11) and rotates around the rotating shaft (11). The meshing block shaft (131) of the meshing block (13) passes into the circular hole (124) at the Y end of the lever. At the same time, the limiting groove (132) of the meshing block shaft and the radial threaded hole (125) of the meshing block shaft are aligned. The axial positioning and rotation functions of the meshing block are realized by the cylinder of the head of the internal hexagonal cylindrical end set screw (15).

7. A diaphragm actuated differential lock mechanism according to any one of claims 1 to 6, characterised in that: The engagement block (13) includes an engagement block shaft (131), an engagement block shaft limiting groove (132), and an engagement block locking block (133). The engagement block shaft (131) is inserted into the circular hole at the end of the control lever. The engagement block locking block (133) is locked in the sliding engagement sleeve groove (161) on the sliding engagement sleeve (16). The V-shaped structure at both ends of the retaining spring (14) is inserted into the radial threaded hole at the end of the control lever shaft to realize the positioning function of the sliding engagement sleeve. The internal hexagonal cylindrical end set screw is screwed into the radial threaded hole at the end of the shaft, and at the same time, its cylindrical head is locked in the engagement block shaft limiting groove (132) to realize the axial positioning of the engagement block and realize the rotation function.

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