Electromagnetic differential lock for automobile

Abstract

The invention provides an electromagnetic differential lock for an automobile, which comprises a shell, a differential mechanism arranged in the shell and a locking mechanism arranged on one side of the shell and used for locking the differential mechanism, and an electromagnetic component acting on the locking mechanism is arranged at the outer end of the shell so as to control the locking mechanism to act through the electromagnetic component. The main shell drives the combination ring to rotate, the combination ring is pressed on the spacing plate by the wave spring and drives the spacing plate to rotate together, when the differential function is locked, the electromagnetic coil adsorbs the spacing plate to generate braking, so that the rotating speed difference is generated between the spacing plate and the main shell, and the combination ring abuts against the interior of the spiral groove through the spherical surface at the tail end of the clamping jaw. And the combination ring is pushed to perform axial displacement by utilizing the lift of the inclined end surface of the spiral groove, so that the combination ring and the first half axle gear are locked. And during resetting, the electromagnetic coil is powered off, and the combination ring is pushed by the wave spring to move, so that the first combination tooth is separated from the second combination tooth.

Description

Technical Field

[0001] The invention relates to the technical field of differential locks, in particular to an electromagnetic differential lock for automobiles. Background Art

[0002] The car differential can make the left and right drive wheels rotate at different speeds. When the car is on bad road conditions, the drive wheels are prone to slipping and cannot be driven out, so the differential needs to be locked and fixed. The existing locking differential uses a spring to push the thrust ring to disengage the clutch, but the disengagement stroke is long, resulting in the problem that it cannot be disengaged after locking. Summary of the invention

[0003] The technical problem solved by the present invention is to provide an electromagnetic differential lock for an automobile to solve the problems raised in the above background technology.

[0004] The technical problem solved by the present invention is achieved by adopting the following technical solution: an electromagnetic differential lock for a vehicle, comprising a housing and a differential mechanism arranged in the housing, and a locking mechanism arranged on one side of the housing for locking the differential mechanism, wherein an electromagnetic component acting on the locking mechanism is provided at the outer end of the housing to control the action of the locking mechanism through the electromagnetic component; The differential mechanism includes a first half-shaft gear and a second half-shaft gear arranged in the casing, and the locking mechanism includes a coupling ring arranged at the outer end of the first half-shaft gear, a matching tooth structure is provided on the opposite side of the coupling ring and the first half-shaft gear, and a resilient wave spring is provided between the coupling ring and the first half-shaft gear, and claws are distributed in an annular manner on the outer end of the coupling ring, and the claws pass through the corresponding claw holes of the casing to be connected to the electromagnetic component, and the electromagnetic component controls the movement of the coupling ring through the claws to achieve differential locking and fixation.

[0005] As a further embodiment of the present invention: The first half-shaft gear and the second half-shaft gear are rotatably mounted on both sides of the casing. Planetary gears are distributed between the first half-shaft gear and the second half-shaft gear in the casing to connect the first half-shaft gear and the second half-shaft gear on both sides to achieve differential action. The planetary gears are rotatably mounted on the planetary shaft and fixedly arranged at the corresponding position of the casing through the planetary shaft.

[0006] As a further embodiment of the present invention: The first half-shaft gear includes a tooth body and a tooth cylinder integrally connected to the tooth body, a tooth plate is provided on the side of the tooth body close to the tooth cylinder, the wave spring and the coupling ring are respectively sleeved on the outer end of the tooth cylinder, one end of the wave spring is against the outer end of the tooth plate, and the other end is against the coupling ring, so that the coupling ring is elastically slidably set on the tooth cylinder, and the coupling ring and the tooth cylinder are matched with a small gap.

[0007] As a further embodiment of the present invention: The clamping tooth structure includes a first combination tooth annularly arranged at the outer end of the tooth plate and a second combination tooth annularly arranged on the combination ring. The first combination tooth is located at the outer end of the wave spring and limits the wave spring. The first combination tooth and the second combination tooth are arranged at intervals and are arranged with large clearances. When the first combination tooth and the second combination tooth are respectively inserted into the corresponding tooth grooves, the combination ring is clamped and fixed with the first half-shaft gear.

[0008] As a further embodiment of the present invention: The casing includes a main shell and an upper cover arranged at the outer end of the main shell, the main shell is provided with an integrally connected flange plate corresponding to the upper cover, and the flange plate is fixedly connected to the upper cover by distributed bolts; a shell cylinder is provided on the side of the main shell away from the upper cover, and an inner cavity of the shell cylinder is provided with an axial hole for accommodating a transmission shaft to pass through.

[0009] As a further embodiment of the present invention: The electromagnetic assembly includes a spacer plate sleeved on the outer end of the shell tube and an electromagnetic coil arranged on the outer end of the spacer plate. The electromagnetic coil is fixed to the axle housing by a bayonet and is stationary relative to the axle housing. The electromagnetic coil is sleeved on the shell tube through a coil bracket. There is a clearance fit between the coil bracket and the shell tube. An end thrust bearing is provided on the side of the coil bracket facing the spacer plate. There is a clearance fit between the spacer plate and the shell tube, and one side of the spacer plate is connected to the coil bracket through the end thrust bearing so that the spacer plate can be rotatably installed on the shell tube. Under normal driving conditions, the main housing drives the coupling ring to rotate, and the coupling ring is pressed against the spacer plate by the wave spring, driving the spacer plate to rotate together.

[0010] As a further embodiment of the present invention: The spacer plate corresponds to the claw and is provided with a spiral groove that cooperates with it. The claw and the spiral groove are matched in four groups in an annular manner to ensure that the force on the combining ring is uniform. The two sides of the spiral groove are inclined end faces, and the end of the claw is a spherical surface, so that it can contact the spiral groove on the spacer plate through the spherical surface, and the inclined end face lift of the spiral groove is used to push the claw to perform axial displacement.

[0011] As a further embodiment of the present invention: The outer end of the shell is also provided with a clamping ring for limiting the coil support to prevent the coil support from falling off the shell. The shell is provided with a corresponding ring groove corresponding to the clamping ring, and the clamping ring is clamped and fixed in the ring groove.

[0012] As a further embodiment of the present invention: The side of the first half-shaft gear away from the second half-shaft gear is pressed against the inner wall of the main shell through the first gear gasket, and the side of the second half-shaft gear away from the first half-shaft gear is pressed against the inner wall of the upper cover through the second gear gasket, so as to improve the installation stability of the first half-shaft gear and the second half-shaft gear.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the main housing drives the coupling ring to rotate, and the coupling ring is pressed against the partition plate by the wave spring, driving the partition plate to rotate together. When the differential function is locked, the electromagnetic coil adsorbs the partition plate to generate braking, so that a speed difference is generated between the partition plate and the main housing. The coupling ring is set in the spiral groove through the spherical surface at the end of the claw, and the inclined end face lift of the spiral groove is used to push the coupling ring for axial displacement, so that the coupling ring is locked with the first half-shaft gear. When resetting, the electromagnetic coil is powered off, and the coupling ring moves under the push of the wave spring, so that the first coupling tooth and the second coupling tooth are disengaged. The patent structure of the present invention is compact, which can effectively save layout space and is conducive to layout in the bridge housing. The coupling and disengagement stroke is short, the reliability is high, and the problem of being unable to disengage after locking can be effectively avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a partial cross-sectional structural schematic diagram of the present invention; Figure 3 It is a schematic diagram of the explosion decomposition structure of the present invention; Figure 4 It is a schematic diagram of the structure of the first half-shaft gear of the present invention; Figure 5 is a schematic diagram of the binding ring structure of the present invention; Figure 6 It is a schematic diagram of the structure of the partition plate of the present invention; Markings in the figure: 1. Casing; 2. First half-shaft gear; 3. Second half-shaft gear; 4. Coupling ring; 5. Wave spring; 6. Planetary gear; 7. Spacer plate; 8. Electromagnetic coil; 11. Main housing; 12. Upper cover; 13. Flange plate; 14. Shell cylinder; 15. Retaining ring; 16. First gear gasket; 17. Second gear gasket; 21. Gear body; 22. Gear cylinder; 23. Gear plate; 24. First coupling tooth; 41. Claw; 42. Second coupling tooth; 71. Spiral groove; 81. Coil bracket; 82. End thrust bearing. DETAILED DESCRIPTION

[0015] In order to make the technical means for realizing the present invention, the creative features, the objectives and effects to be achieved easily understood, the present invention is further described below with reference to specific diagrams.

[0016] like Figures 1 to 6 As shown, This embodiment provides an electromagnetic differential lock for a vehicle, comprising a housing 1, a differential mechanism disposed in the housing 1, and a locking mechanism disposed on one side of the housing 1 for locking the differential mechanism, wherein an electromagnetic component acting on the locking mechanism is disposed at the outer end of the housing 1, so as to control the action of the locking mechanism through the electromagnetic component; The differential mechanism includes a first half-shaft gear 2 and a second half-shaft gear 3 arranged in a housing 1, and the locking mechanism includes a coupling ring 4 arranged at the outer end of the first half-shaft gear 2, and a matching tooth structure is provided on the opposite side of the coupling ring 4 and the first half-shaft gear 2, and a resilient wave spring 5 is provided between the coupling ring 4 and the first half-shaft gear 2, and claws 41 are distributed in an annular manner on the outer end of the coupling ring 4, and the claws 41 pass through the corresponding claw holes of the housing 1 to be connected with the electromagnetic component, and the electromagnetic component controls the movement of the coupling ring 4 through the claws 41 to achieve differential locking and fixation.

[0017] In this embodiment, the first half-shaft gear 2 and the second half-shaft gear 3 are rotatably mounted on both sides of the casing 1, and a planetary gear 6 is distributed between the first half-shaft gear 2 and the second half-shaft gear 3 in the casing 1 to connect the first half-shaft gear 2 and the second half-shaft gear 3 on both sides to achieve differential action. The planetary gear 6 is rotatably mounted on the planetary shaft and is fixedly set at the corresponding position of the casing 1 through the planetary shaft.

[0018] The first half-shaft gear 2 includes a tooth body 21 and a gear cylinder 22 integrally connected to the tooth body 21. A tooth plate 23 is provided on the side of the tooth body 21 close to the gear cylinder 22. The wave spring 5 and the coupling ring 4 are respectively sleeved on the outer end of the gear cylinder 22. One end of the wave spring 5 is against the outer end of the tooth plate 23, and the other end is against the coupling ring 4, so that the coupling ring 4 is elastically slidably set on the gear cylinder 22, and the coupling ring 4 and the gear cylinder 22 are matched with a small gap.

[0019] In this embodiment, the latching tooth structure includes a first coupling tooth 24 annularly arranged at the outer end of the tooth plate 23 and a second coupling tooth 42 annularly arranged on the coupling ring 4. The first coupling tooth 24 is located at the outer end of the wave spring 5 and limits the wave spring 5. The first coupling tooth 24 and the second coupling tooth 42 are arranged at intervals and are arranged with large clearances. When the first coupling tooth 24 and the second coupling tooth 42 are respectively inserted into the corresponding tooth grooves, the coupling ring 4 is fixedly engaged with the first side shaft gear 2.

[0020] In this embodiment, the casing 1 includes a main shell 11 and an upper cover 12 arranged at the outer end of the main shell 11, and the main shell 11 is provided with a flange plate 13 integrally connected to the upper cover 12, and the flange plate 13 is fixedly connected to the upper cover 12 by distributed bolts; a shell cylinder 14 is provided on the side of the main shell 11 away from the upper cover 12, and an inner cavity of the shell cylinder 14 is provided with an axial hole for accommodating the transmission shaft to pass through.

[0021] In this embodiment, the electromagnetic assembly includes a spacer plate 7 sleeved on the outer end of the shell barrel 14 and an electromagnetic coil 8 arranged on the outer end of the spacer plate 7. The electromagnetic coil 8 is fixed to the axle housing by a bayonet and is stationary relative to the axle housing. The electromagnetic coil 8 is sleeved on the shell barrel 14 through a coil support 81. The coil support 81 and the shell barrel 14 are clearance-matched. The coil support 81 is provided with an end thrust bearing 82 on the side facing the spacer plate 7. The spacer plate 7 and the shell barrel 14 are clearance-matched, and one side of the spacer plate 7 is connected to the coil support 81 through the end thrust bearing 82, so that the spacer plate 7 is rotatably installed on the shell barrel 14. Under normal driving conditions, the main housing 11 drives the coupling ring 4 to rotate, and the coupling ring 4 is pressed against the spacer plate 7 by the wave spring 5, driving the spacer plate 7 to rotate together.

[0022] The spacer plate 7 is provided with a spiral groove 71 corresponding to the claw 41, and the claw 41 and the spiral groove 71 are matched with each other in four groups in a ring shape so that the force on the coupling ring 4 is uniform. The two sides of the spiral groove 71 are inclined end faces, and the end of the claw 41 is a spherical surface, so that it can contact the spiral groove 71 on the spacer plate 7 through the spherical surface, and the inclined end face lift of the spiral groove 71 is used to push the claw 41 to perform axial displacement.

[0023] The outer end of the shell 14 is also provided with a clamping ring 15 for limiting the coil support 81 to prevent the coil support 81 from falling off the shell 14. The shell 14 is provided with a corresponding annular groove corresponding to the clamping ring, and the clamping ring 15 is clamped and fixed in the annular groove.

[0024] In this embodiment, the side of the first half-shaft gear 2 away from the second half-shaft gear 3 is abutted against the inner wall of the main housing 11 through the first gear gasket 16, and the side of the second half-shaft gear 3 away from the first half-shaft gear 2 is abutted against the inner wall of the upper cover 12 through the second gear gasket 17, so as to improve the installation stability of the first half-shaft gear 2 and the second half-shaft gear 3.

[0025] Specifically, when the differential locking function is required, the electromagnetic coil 8 is energized by the driver manually or automatically, and the electromagnetic coil 8 generates an electromagnetic force, which adsorbs the spacer plate 7 on the electromagnetic coil 8 through the flat end. Since the electromagnetic coil 8 is fixed on the axle housing, the friction force generated by the electromagnetic force causes the spacer plate 7 to be braked, and a speed difference is generated between the spacer plate 7 and the main housing 11. The spiral groove 71 pushes the coupling ring 4 to axially displace, compressing the wave spring 5 until the second coupling tooth 42 on the coupling ring 4 is coupled with the first coupling tooth 24 on the half-shaft gear, and reaches the limit position. At this time, the half-shaft gear and the main housing 11 are connected as a whole through the coupling ring 4, and the differential function fails, forming a lock. After the coupling ring 4 reaches the limit position, it cannot continue to move axially, which will cause the spacer plate 7 to overcome the friction force generated by the electromagnetic force and continue to rotate with the main housing 11 and maintain a locked state.

[0026] When the vehicle is out of trouble and the differential function needs to be restored, the electromagnet is powered off manually or automatically by the driver, the electromagnetic force disappears, the friction force generated disappears at the same time, and the spacer plate 7 resumes free rotation. Under the elastic force of the wave spring 5, the coupling ring 4 is pushed back to its original position, and the differential function is restored. The above shows and describes the basic principle and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents. It should be noted that, in this article, if there are relational terms such as first and second, it is only used to distinguish one entity or operation from another entity or operation, and does not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "includes", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. An electromagnetic differential lock for a vehicle, characterized in that: It includes a housing, a differential mechanism arranged in the housing, and a locking mechanism arranged on one side of the housing for locking the differential mechanism, wherein an electromagnetic component acting on the locking mechanism is arranged at the outer end of the housing to control the action of the locking mechanism through the electromagnetic component; The differential mechanism includes a first half-shaft gear and a second half-shaft gear arranged in the casing, and the locking mechanism includes a coupling ring arranged at the outer end of the first half-shaft gear, a matching tooth structure is provided on the opposite side of the coupling ring and the first half-shaft gear, and a resilient wave spring is provided between the coupling ring and the first half-shaft gear, and claws are arranged in a ring-shaped distribution on the outer end of the coupling ring, and the claws pass through the corresponding claw holes of the casing to be connected to the electromagnetic component, and the electromagnetic component controls the movement of the coupling ring through the claws.

2. The electromagnetic differential lock for automobile according to claim 1, characterized in that: The first half-shaft gear and the second half-shaft gear are rotatably mounted on both sides of the casing. Planetary gears are distributed between the first half-shaft gear and the second half-shaft gear in the casing to connect the first half-shaft gear and the second half-shaft gear on both sides to achieve differential action. The planetary gears are rotatably mounted on the planetary shaft and fixedly arranged at the corresponding position of the casing through the planetary shaft.

3. The electromagnetic differential lock for automobile according to claim 2, characterized in that: The first half-shaft gear includes a tooth body and a tooth cylinder integrally connected to the tooth body, a tooth plate is provided on the side of the tooth body close to the tooth cylinder, the wave spring and the coupling ring are respectively sleeved on the outer end of the tooth cylinder, one end of the wave spring is against the outer end of the tooth plate, and the other end is against the coupling ring, so that the coupling ring is elastically slidably set on the tooth cylinder, and the coupling ring and the tooth cylinder are matched with a small gap.

4. The electromagnetic differential lock for automobile according to claim 3, characterized in that: The latching tooth structure includes a first combining tooth arranged in an annular distribution at the outer end of the tooth plate and a second combining tooth arranged in an annular distribution on the combining ring. The first combining tooth is located at the outer end of the wave spring and limits the wave spring. The first combining tooth and the second combining tooth are arranged at intervals, and the first combining tooth and the second combining tooth are arranged with a large clearance.

5. The electromagnetic differential lock for automobile according to claim 1, characterized in that: The casing includes a main shell and an upper cover arranged at the outer end of the main shell, the main shell is provided with an integrally connected flange plate corresponding to the upper cover, and the flange plate is fixedly connected to the upper cover by distributed bolts; a shell cylinder is provided on the side of the main shell away from the upper cover, and an inner cavity of the shell cylinder is provided with an axial hole for accommodating a transmission shaft to pass through.

6. The electromagnetic differential lock for automobiles according to claim 5, characterized in that: The electromagnetic assembly includes a spacer plate sleeved on the outer end of the shell tube and an electromagnetic coil arranged on the outer end of the spacer plate. The electromagnetic coil is fixed to the axle housing by a bayonet and is stationary relative to the axle housing. The electromagnetic coil is loosely sleeved on the shell tube through a coil bracket. There is a clearance fit between the coil bracket and the shell tube. An end thrust bearing is provided on the side of the coil bracket facing the spacer plate. There is a clearance fit between the spacer plate and the shell tube, and one side of the spacer plate is connected to the coil bracket through the end thrust bearing so that the spacer plate can be rotatably installed on the shell tube.

7. The electromagnetic differential lock for automobile according to claim 6, characterized in that: The spacer plate corresponds to the claw and is provided with a spiral groove that cooperates with it. The claw and the spiral groove are annularly matched and are provided with four groups so that the force on the coupling ring is uniform. The two sides of the spiral groove are inclined end faces, and the end of the claw is a spherical surface so that it can contact the spiral groove on the spacer plate through the spherical surface.

8. The electromagnetic differential lock for automobiles according to claim 6, characterized in that: The outer end of the shell is also provided with a clamping ring for limiting the coil support to prevent the coil support from falling off the shell. The shell is provided with a corresponding ring groove corresponding to the clamping ring, and the clamping ring is clamped and fixed in the ring groove.

9. The electromagnetic differential lock for automobile according to claim 3, characterized in that: The side of the first half-shaft gear away from the second half-shaft gear is abutted against the inner wall of the main housing through a first gear gasket, and the side of the second half-shaft gear away from the first half-shaft gear is abutted against the inner wall of the upper cover through a second gear gasket.

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