Power disconnecting differential

Abstract

The utility model relates to differential mechanism technology discloses a power disconnecting type differential mechanism, its installation cavity installs end tooth combination unit, and end tooth combination unit includes end tooth combination cover and end tooth combination support, end tooth combination cover is equipped with the tooth surface and end surface, and the tooth surface of end tooth combination cover is connected with end tooth combination support, the end surface of end tooth combination cover is connected with differential mechanism casing, and the one end of differential mechanism casing still has electromagnetic coil and plane cam in proper order, and the end surface one side of plane cam is connected with end tooth combination cover, the utility model discloses the differential mechanism of design uses electromagnetic coil to replace the execution motor, replaces the axial movement of fork through the rotation of cam's climbing, and small, low in cost, and electromagnetic coil is arranged in the inside of drive axle casing, and life is greatly improved.

Description

Technical Field

[0001] This utility model relates to differential technology, and more particularly to a power disconnect differential. Background Technology

[0002] A car differential is a mechanism that allows the left and right (or front and rear) drive wheels to rotate at different speeds. It mainly consists of left and right half-shaft gears, two planetary gears, and a gear carrier. Its function is to ensure that the left and right wheels rotate at different speeds when the car is turning or driving on uneven surfaces, thus guaranteeing pure rolling motion for both drive wheels. The differential is designed to adjust the speed difference between the left and right wheels. In four-wheel drive, all four wheels must be connected to drive them. If the four wheels are mechanically connected, the car will not rotate at the same speed when driving on curves. To ensure a relatively consistent rotational speed when driving on curves, a center differential is needed to adjust the speed difference between the front and rear wheels.

[0003] Part-time four-wheel drive models can manually switch between two-wheel drive and four-wheel drive modes, making them suitable for heavy off-road scenarios. They require a differential with a power disconnect mechanism.

[0004] The existing technology CN202320221099.2 mainly adopts the solution of using an actuator motor to control the disengagement and engagement of the shift fork. However, the actuator motor and shift fork occupy a large space and are costly. In addition, the motor can only be placed outside the drive axle housing, which makes the motor easy to be damaged when wading in deep water. Summary of the Invention

[0005] This invention addresses the problems of existing differentials where the actuator motor controls the disengagement and engagement of the shift fork, resulting in large space occupation, high cost, and the motor being easily damaged when wading in deep water. It provides a power-disengageable differential.

[0006] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method: A power disconnect differential includes a differential housing, a differential cover, and a main reduction gear. The differential housing and the differential cover are connected to form a differential housing. The main reduction gear is located outside the differential housing, and the differential housing and the differential cover have mounting cavities. An end gear engagement unit is installed in the mounting cavity. The end gear engagement unit includes an end gear engagement cover and an end gear engagement bracket. The end gear engagement cover has a toothed surface and an end face. The toothed surface of the end gear engagement cover is connected to the end gear engagement bracket; the end face of the end gear engagement cover is connected to the differential housing. An electromagnetic coil and a flat cam are connected in sequence to one end of the differential housing. The flat cam is connected to one side of the end face of the end gear engagement cover.

[0007] Preferably, the end toothed cap has several end tooth units on one side of its end face. Each end tooth unit includes an end and a protrusion. The protrusion is located on the side of the end and forms a groove with the bottom of the end toothed cap. An elastic component is installed in the groove.

[0008] Preferably, the planar cam has several cam grooves on one side, and the end tooth unit of the end tooth engagement cover meshes with the cam grooves.

[0009] Preferably, the differential housing has several end holes on one side, through which the end tooth unit of the end tooth engagement cover passes.

[0010] Preferably, the end gear engagement unit contains a planetary gear unit and a half-shaft gear, with the half-shaft gear located at both ends of the end gear engagement bracket.

[0011] Preferably, the planetary gear unit includes a planetary gear long shaft, a planetary gear short shaft, and a planetary gear. Both the planetary gear long shaft and the planetary gear short shaft pass through the planetary gear, and the planetary gear short shaft passes through the end of the planetary gear long shaft. The end gear coupling bracket has several shaft holes on its axial surface, through which the planetary gear long shaft and the planetary gear short shaft pass.

[0012] Preferably, the end face of the end gear coupling bracket is provided with several pin holes, and the short shaft of the planetary gear is provided with pins at both ends, with the pins passing through the pin holes.

[0013] Preferably, the electromagnetic coil, the planar cam, and the differential housing are located on the same axis.

[0014] Preferably, the differential housing is also provided with an array of shaft holes in the axial direction.

[0015] This utility model, by adopting the above technical solution, has significant technical effects: The differential designed in this utility model uses an electromagnetic coil instead of an actuator motor, and replaces the axial movement of the shift fork with the rotation and climbing of the cam. It has a small space and low cost, and the electromagnetic coil is arranged inside the drive axle housing, which greatly improves its service life.

[0016] The electromagnetic coil of this invention is installed inside the drive axle housing, making it less prone to damage and significantly extending its service life. When the electromagnetic coil is not energized, it is reset by a wave spring and maintains a stable disconnected state, eliminating the need for continuous energization. Attached Figure Description

[0017] Figure 1 This is a structural diagram of the differential of this utility model.

[0018] Figure 2 This is a structural diagram of the differential part of this utility model.

[0019] Figure 3 This is a structural diagram of the end toothed cap of this utility model.

[0020] Figure 4 This is a structural diagram of the differential housing of this utility model.

[0021] Figure 5 This is a structural diagram of the end-tooth coupling unit of this utility model.

[0022] Figure 6 This is a structural diagram of the end-tooth combined bracket of this utility model.

[0023] Among them, 1—differential housing, 2—differential cover, 3—main reduction gear, 4—end gear engagement unit, 41—end gear engagement cover, 42—end gear engagement bracket, 43—end gear unit, 431—end, 432—protrusion, 44—elastic component, 45—planetary gear unit, 46—half-shaft gear, 5—electromagnetic coil, 6—planetary cam, 61—cam groove, 11—end hole, 12—shaft hole, 451—planetary gear long shaft, 452—planetary gear short shaft, 453—planetary gear, 421—planetary gear shaft hole, 422—pin hole. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0025] Example 1 A power disconnect differential, Figure 1 In the differential, there are differential housing 1, differential cover 2 and main reduction gear 3. Differential housing 1 and differential cover 2 are connected to form differential housing. The main reduction gear 3 is located outside the differential housing. Differential housing 1 and differential cover 2 have mounting cavities. An end gear engagement unit 4 is installed in the mounting cavity. The end gear engagement unit 4 includes an end gear engagement cover 41 and an end gear engagement bracket 42. The end gear engagement cover 41 has a toothed surface and an end face. The toothed surface of the end gear engagement cover 41 is connected to the end gear engagement bracket 42; the end face of the end gear engagement cover 41 is connected to the differential housing 1. An electromagnetic coil 5 and a flat cam 6 are connected in sequence to one end of the differential housing 1. The flat cam 6 is connected to one side of the end face of the end gear engagement cover 41.

[0026] Example 2 A power disconnect differential, Figure 1 In the differential, there are differential housing 1, differential cover 2 and main reduction gear 3. Differential housing 1 and differential cover 2 are connected to form differential housing. The main reduction gear 3 is located outside the differential housing. Differential housing 1 and differential cover 2 have mounting cavities. An end gear engagement unit 4 is installed in the mounting cavity. The end gear engagement unit 4 includes an end gear engagement cover 41 and an end gear engagement bracket 42. The end gear engagement cover 41 has a toothed surface and an end face. The toothed surface of the end gear engagement cover 41 is connected to the end gear engagement bracket 42; the end face of the end gear engagement cover 41 is connected to the differential housing 1. An electromagnetic coil 5 and a flat cam 6 are connected in sequence to one end of the differential housing 1. The flat cam 6 is connected to one side of the end face of the end gear engagement cover 41.

[0027] exist Figure 3 The end face of the end tooth engagement cover 41 is provided with four end tooth units 43. Each end tooth unit 43 includes an end portion 431 and a protrusion 432. The protrusion 432 is located on the side of the end portion 431, and the protrusion 432 forms a groove with the bottom of the end tooth engagement cover 41. An elastic member 44 is installed in the groove. In this embodiment, the elastic member 44 is a coiled spring.

[0028] The planar cam 6 has four cam grooves 61 on one side, and the end tooth unit 43 of the end tooth engagement cover 41 meshes with the cam grooves 61.

[0029] The differential housing 1 has four end holes 11 on one side, and the four end tooth units 43 of the end tooth engagement cover 41 pass through the end holes 11.

[0030] Example 3 A power disconnect differential, Figure 1 In the differential, there are differential housing 1, differential cover 2 and main reduction gear 3. Differential housing 1 and differential cover 2 are connected to form differential housing. The main reduction gear 3 is located outside the differential housing. Differential housing 1 and differential cover 2 have mounting cavities. An end gear engagement unit 4 is installed in the mounting cavity. The end gear engagement unit 4 includes an end gear engagement cover 41 and an end gear engagement bracket 42. The end gear engagement cover 41 has a toothed surface and an end face. The toothed surface of the end gear engagement cover 41 is connected to the end gear engagement bracket 42; the end face of the end gear engagement cover 41 is connected to the differential housing 1. An electromagnetic coil 5 and a flat cam 6 are connected in sequence to one end of the differential housing 1. The flat cam 6 is connected to one side of the end face of the end gear engagement cover 41.

[0031] exist Figure 3 The end face of the end tooth engagement cover 41 is provided with four end tooth units 43. Each end tooth unit 43 includes an end portion 431 and a protrusion 432. The protrusion 432 is located on the side of the end portion 431, and the protrusion 432 forms a groove with the bottom of the end tooth engagement cover 41. An elastic member 44 is installed in the groove. In this embodiment, the elastic member 44 is a coiled spring.

[0032] The planar cam 6 has four cam grooves 61 on one side, and the end tooth unit 43 of the end tooth engagement cover 41 meshes with the cam grooves 61.

[0033] The differential housing 1 has four end holes 11 on one side, and the four end tooth units 43 of the end tooth engagement cover 41 pass through the end holes 11.

[0034] The end gear engagement unit 4 contains a planetary gear unit 45 and a half-shaft gear 46. The half-shaft gear 46 has two located at both ends of the end gear engagement bracket 42.

[0035] The planetary gear unit 45 includes a planetary gear long shaft 451, a planetary gear short shaft 452, and a planetary gear. Both the planetary gear long shaft 451 and the planetary gear short shaft 452 pass through the planetary gear, and the planetary gear short shaft 452 passes through the end of the planetary gear long shaft 451. The axial surface of the end gear engagement bracket is provided with several planetary gear shaft holes 421, through which the planetary gear long shaft 451 and the planetary gear short shaft pass.

[0036] There are four planetary gears 451, namely a first planetary gear 451, a second planetary gear 451, a third planetary gear 451 and a fourth planetary gear 451; the first planetary gear and the third planetary gear are arranged opposite each other, and the long shaft 451 of the planetary gear passes through the first planetary gear 451 and the third planetary gear 451; the second planetary gear 451 and the fourth planetary gear 451 are arranged opposite each other, and the short shaft 452 of the planetary gear passes through the first planetary gear 451 and the third planetary gear 451.

[0037] The end face of the end gear coupling bracket 42 is provided with several pin holes 422, and the planetary gear short shaft 452 is provided with pins at both ends, with the pins passing through the pin holes 422.

[0038] Example 4 A power disconnect differential, Figure 1 In the differential, there are differential housing 1, differential cover 2 and main reduction gear 3. Differential housing 1 and differential cover 2 are connected to form differential housing. The main reduction gear 3 is located outside the differential housing. Differential housing 1 and differential cover 2 have mounting cavities. An end gear engagement unit 4 is installed in the mounting cavity. The end gear engagement unit 4 includes an end gear engagement cover 41 and an end gear engagement bracket 42. The end gear engagement cover 41 has a toothed surface and an end face. The toothed surface of the end gear engagement cover 41 is connected to the end gear engagement bracket 42; the end face of the end gear engagement cover 41 is connected to the differential housing 1. An electromagnetic coil 5 and a flat cam 6 are connected in sequence to one end of the differential housing 1. The flat cam 6 is connected to one side of the end face of the end gear engagement cover 41.

[0039] exist Figure 3The end face of the end tooth engagement cover 41 is provided with four end tooth units 43. Each end tooth unit 43 includes an end portion 431 and a protrusion 432. The protrusion 432 is located on the side of the end portion 431, and the protrusion 432 forms a groove with the bottom of the end tooth engagement cover 41. An elastic member 44 is installed in the groove. In this embodiment, the elastic member 44 is a coiled spring.

[0040] The planar cam 6 has four cam grooves 61 on one side, and the end tooth unit 43 of the end tooth engagement cover 41 meshes with the cam grooves 61.

[0041] The differential housing 1 has four end holes 11 on one side, and the four end tooth units 43 of the end tooth engagement cover 41 pass through the end holes 11.

[0042] The end gear engagement unit 4 contains a planetary gear unit 45 and a half-shaft gear 46. The half-shaft gear 46 has two located at both ends of the end gear engagement bracket 42.

[0043] The planetary gear unit 45 includes a planetary gear long shaft 451, a planetary gear short shaft 452, and a planetary gear. Both the planetary gear long shaft 451 and the planetary gear short shaft 452 pass through the planetary gear, and the planetary gear short shaft 452 passes through the end of the planetary gear long shaft 451. The axial surface of the end gear engagement bracket is provided with several planetary gear shaft holes 421, through which the planetary gear long shaft 451 and the planetary gear short shaft 452 pass.

[0044] There are four planetary gears 451, namely a first planetary gear 451, a second planetary gear 451, a third planetary gear 451 and a fourth planetary gear 451; the first planetary gear and the third planetary gear are arranged opposite each other, and the long shaft 451 of the planetary gear passes through the first planetary gear 451 and the third planetary gear 451; the second planetary gear 451 and the fourth planetary gear 451 are arranged opposite each other, and the short shaft 452 of the planetary gear passes through the first planetary gear 451 and the third planetary gear 451.

[0045] The end face of the end gear coupling bracket 42 is provided with several pin holes 422, and the planetary gear short shaft 452 is provided with pins at both ends, with the pins passing through the pin holes 422.

[0046] The electromagnetic coil 5, the planar cam 6, and the differential housing 1 are located on the same axis.

[0047] Example 5 A power disconnect differential, Figure 1 In the differential, there are differential housing 1, differential cover 2 and main reduction gear 3. Differential housing 1 and differential cover 2 are connected to form differential housing. The main reduction gear 3 is located outside the differential housing. Differential housing 1 and differential cover 2 have mounting cavities. An end gear engagement unit 4 is installed in the mounting cavity. The end gear engagement unit 4 includes an end gear engagement cover 41 and an end gear engagement bracket 42. The end gear engagement cover 41 has a toothed surface and an end face. The toothed surface of the end gear engagement cover 41 is connected to the end gear engagement bracket 42; the end face of the end gear engagement cover 41 is connected to the differential housing 1. An electromagnetic coil 5 and a flat cam 6 are connected in sequence to one end of the differential housing 1. The flat cam 6 is connected to one side of the end face of the end gear engagement cover 41.

[0048] exist Figure 3 The end face of the end tooth engagement cover 41 is provided with four end tooth units 43. Each end tooth unit 43 includes an end portion 431 and a protrusion 432. The protrusion 432 is located on the side of the end portion 431, and the protrusion 432 forms a groove with the bottom of the end tooth engagement cover 41. An elastic member 44 is installed in the groove. In this embodiment, the elastic member 44 is a coiled spring.

[0049] The planar cam 6 has four cam grooves 61 on one side, and the end tooth unit 43 of the end tooth engagement cover 41 meshes with the cam grooves 61.

[0050] The differential housing 1 has four end holes 11 on one side, and the four end tooth units 43 of the end tooth engagement cover 41 pass through the end holes 11.

[0051] The end gear engagement unit 4 contains a planetary gear unit 45 and a half-shaft gear 46. The half-shaft gear 46 has two located at both ends of the end gear engagement bracket 42.

[0052] The planetary gear unit 45 includes a planetary gear long shaft 451, a planetary gear short shaft 452, and a planetary gear. Both the planetary gear long shaft 451 and the planetary gear short shaft 452 pass through the planetary gear, and the planetary gear short shaft 452 passes through the end of the planetary gear long shaft 451. The axial surface of the end gear engagement bracket is provided with several planetary gear shaft holes 421, through which the planetary gear long shaft 451 and the planetary gear short shaft 452 pass.

[0053] There are four planetary gears 451, namely a first planetary gear 451, a second planetary gear 451, a third planetary gear 451 and a fourth planetary gear 451; the first planetary gear and the third planetary gear are arranged opposite each other, and the long shaft 451 of the planetary gear passes through the first planetary gear 451 and the third planetary gear 451; the second planetary gear 451 and the fourth planetary gear 451 are arranged opposite each other, and the short shaft 452 of the planetary gear passes through the first planetary gear 451 and the third planetary gear 451.

[0054] The end face of the end gear coupling bracket 42 is provided with several pin holes 422, and the planetary gear short shaft 452 is provided with pins at both ends, with the pins passing through the pin holes 422.

[0055] The electromagnetic coil 5, the planar cam 6, and the differential housing 1 are located on the same axis.

[0056] The differential housing 1 is also provided with an array of shaft holes 12 in the axial direction.

[0057] When the electromagnetic coil 5 is not energized, it is in two-wheel drive mode. Power is transmitted to the differential housing 1, end gear engagement plate and plane cam 6 through the main reduction gear 3. Other internal components are not powered, and the output end is passively pushed or pulled forward by the vehicle.

[0058] When the vehicle needs four-wheel drive off-road or get-out-of-difficulty mode, the electromagnetic coil 5 is energized, attracting the planar cam 6. The end gear engagement disc and the planar cam 6 form a speed difference, thus climbing up, and engaging with the end gear inner bracket. Power is transmitted to the inner bracket and the bevel gear set, and the output end outputs power to move forward.

Claims

1. A power-disconnectable differential, comprising a differential housing, a differential cover, and a main reduction gear, wherein the differential housing and the differential cover are connected to form a differential outer shell, the main reduction gear is located outside the differential outer shell, and the differential housing and the differential cover have mounting cavities; characterized in that, An end-tooth engagement unit is installed inside the mounting cavity. The end-tooth engagement unit includes an end-tooth engagement cover and an end-tooth engagement bracket. The end gear engagement cover has a toothed surface and an end face. The toothed surface of the end gear engagement cover is connected to the end gear engagement bracket; the end face of the end gear engagement cover is connected to the differential housing. An electromagnetic coil and a flat cam are connected in sequence to one end of the differential housing. The flat cam is connected to one side of the end face of the end gear engagement cover.

2. A power-disconnect differential according to claim 1, characterized in that, The end face of the end toothed cap is provided with several end tooth units. Each end tooth unit includes an end and a protrusion. The protrusion is located on the side of the end and forms a groove with the bottom of the end toothed cap. An elastic component is installed in the groove.

3. A power-disconnect differential according to claim 1, characterized in that, The planar cam has several cam grooves on one side, and the end tooth unit of the end tooth engagement cover meshes with the cam grooves.

4. A power-disconnect differential according to claim 1, characterized in that, The differential housing has several end holes on one side, through which the end tooth unit of the end tooth engagement cover passes.

5. A power-disconnect differential according to claim 1, characterized in that, The end gear engagement unit contains a planetary gear unit and a half-shaft gear, with the half-shaft gear located at both ends of the end gear engagement bracket.

6. A power-disconnect differential according to claim 1, characterized in that, The planetary gear unit includes a planetary gear long shaft, a planetary gear short shaft, and planetary gears. Both the planetary gear long shaft and the planetary gear short shaft pass through the planetary gears, and the planetary gear short shaft passes through the end of the planetary gear long shaft. The end gear engagement bracket has several shaft holes on its axial surface, through which the planetary gear long shaft and the planetary gear short shaft pass.

7. A power-disconnect differential according to claim 1, characterized in that, The end face of the end gear coupling bracket is provided with several pin holes, and the short shaft of the planetary gear is provided with pins at both ends, with the pins passing through the pin holes.

8. A power-disconnect differential according to claim 1, characterized in that, The electromagnetic coil, the flat cam, and the differential housing are located on the same axis.

9. A power-disconnect differential according to claim 1, characterized in that, The differential housing also has a series of shaft holes on its axial direction.

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