Electromagnetic locking differential mechanism
The electromagnetic lock differential uses magnetic field repulsion to drive the lock ring engagement, and combines with the reset mechanism, the complex problem of the existing hydraulic lock structure is solved, and the effect of facilitating maintenance and reducing costs is achieved.
Patent Information
- Application Number
- CN202422669198.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-04
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-11-04
AI Technical Summary
The locking structure of the existing differential is hydraulically driven, with complex structure, troublesome maintenance and high cost.
The electromagnetic locking differential is adopted, and the magnetic field repulsion of the energized coil and the magnet ring drives the locking ring engagement, combining the reset spring and the reset column to achieve locking and unlocking. The structure is simple and easy to repair.
The locking structure is simplified, easy to repair and maintenance, reduce maintenance costs, improve service life and driving comfort.
Smart Images
Figure CN223164966U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of differentials and relates to a differential, in particular to an electromagnetic locking differential. Background Art
[0002] The car differential is a mechanism that enables the left and right drive wheels to rotate at different speeds. Its function is to make the left and right wheels roll at different speeds when the car is turning or driving on uneven roads, that is, to ensure that the drive wheels on both sides perform pure rolling motion.
[0003] When one wheel on a car slips, the differential will distribute a massive amount of torque to the slipping wheel, while the torque received by the wheel on the other side is negligible, greatly reducing the car's traction and making it impossible for the vehicle to escape the slipping predicament. Therefore, existing differentials are usually equipped with a locking structure, but the existing locking structure is usually hydraulically driven, with a relatively complex structure, difficult maintenance, and high cost. Utility Model Content
[0004] The purpose of the utility model is to address the above-mentioned problems existing in the prior art and to provide an electromagnetic locking differential with a relatively simple structure and easy repair and maintenance.
[0005] The utility model can be implemented through the following technical solutions: an electromagnetic locking differential, comprising a housing, wherein a half-shaft gear, a planetary gear and a planetary shaft are installed in the housing, a wheel shaft passes through the half-shaft gear, the housing is divided into housing one and housing two, mounting openings are provided at both ends of the housing two, both ends of the mounting opening are fixedly connected to the housing one by bolts, a mounting groove is provided in the housing one, a fixing part is installed in the mounting groove, a coil is installed in the fixing part, an extension part is provided on the half-shaft gear, a spline tooth one is provided on the outer surface of the extension part, a locking ring is installed in the direction of the mounting groove, spline teeth two are provided in the locking ring, a guide block is provided on the outer surface of the locking ring, a guide groove is provided in the housing one, and a magnet ring is provided on the coil end face of the locking ring.
[0006] In the above-mentioned electromagnetic locking differential, a limit block is provided on the guide block, and a limit slot is provided on the guide slot.
[0007] In the above-mentioned electromagnetic locking differential, a first rounded corner is provided at the connection between the guide block and the limiting block, and a second rounded corner is provided at the connection between the guide groove and the limiting groove.
[0008] In the above-mentioned electromagnetic locking differential, a mounting hole is formed in the guide block, a reset spring is mounted in the mounting hole, a reset post is connected to the reset spring, and the reset post abuts against the guide groove.
[0009] In the above electromagnetic locking differential, a round head is provided at the top of the reset post, a buffer pad is installed on the round head, and a round bottom hole is provided on the guiding groove.
[0010] In the above electromagnetic locking differential, the reset post is provided with guiding blades, and a guiding groove is formed on the mounting hole.
[0011] In the above electromagnetic locking differential, a first magnet sheet is fixed on the guiding block, and a second magnet sheet is arranged at the coil end of the guiding groove.
[0012] Compared with the prior art, the advantages of the present utility model are as follows: an energized coil is used as the driving member of the locking structure, and through the principle of like poles repelling each other of magnets, the locking ring is driven to overcome the suction force between the first magnet sheet and the second magnet sheet, so that the locking ring moves to the extension part, and the spline teeth one on the locking ring are engaged with the spline teeth two on the extension part, causing the half shaft gear to stop rotating and be locked; a reset post and a reset spring are arranged in the guiding block as a retracting mechanism. After the coil is powered off, the spring and the reset post reset the locking ring, and the locking ring is positioned after the first magnet sheet and the second magnet sheet are attached to each other, preventing the locking ring from being embedded in the extension part when vibration occurs, resulting in accidental locking of the differential. Description of the Drawings
[0013] Figure 1 is a cross-sectional view of the electromagnetic locking differential;
[0014] Figure 2 is Figure 1 the enlarged view within the circle A in
[0015] Figure 3 is a three-dimensional view of the locking ring assembly of the electromagnetic locking differential;
[0016] Figure 4 is a cross-sectional view of the first housing of the electromagnetic locking differential;
[0017] Figure 5 is a three-dimensional view of the second housing of the electromagnetic locking differential;
[0018] Among them, 1. housing; 11. wheel shaft; 12. first housing; 121. guiding groove; 121a. round bottom hole; 121b. second magnet sheet; 122. limiting groove; 123. second fillet; 13. second housing; 131. mounting opening; 14. mounting groove; 2. half shaft gear; 21. extension part; 211. first spline tooth; 3. planet gear; 4. planet shaft; 5. bolt; 6. fixing part; 61. coil; 7. locking ring; 71. second spline tooth; 72. guiding block; 721. limiting block; 722. mounting hole; 722a. guiding groove; 723. first magnet sheet; 73. magnet ring; 74. first fillet; 8. reset spring; 9. reset post; 91. round head; 911. buffer pad; 92. guiding blade. Detailed Embodiments
[0019] The following are specific embodiments of the present invention and, in conjunction with the accompanying drawings, further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.
[0020] As Figures 1 to 5 shown, the present invention can be realized through the following embodiments: An electromagnetic locking differential includes a housing 1, in which a half-shaft gear 2, a planetary gear 3 and a planetary shaft 4 are installed. A wheel shaft 11 penetrates through the half-shaft gear 2. The housing 1 is divided into a housing one 12 and a housing two 13. Installation openings 131 are provided at both ends of the housing two 13, and both ends of the installation openings 131 are fixedly connected to the housing one 12 through bolts 5. An installation groove 14 is provided in the housing one 12, a fixing part 6 is installed in the installation groove 14, a coil 61 is installed in the fixing part 6, an extension part 21 is provided on the half-shaft gear 2, a spline tooth one 211 is provided on the outer surface of the extension part 21, a locking ring 7 is installed in the direction of the opening of the installation groove 14, a spline tooth two 71 is provided in the locking ring 7, a guide block 72 is provided on the outer surface of the locking ring 7, a guide groove 121 is provided in the housing one 12, and a magnet ring 73 is provided on the end face of the coil 61 of the locking ring 7.
[0021] Openings are provided on both end faces of the housing two 13, and the housing one 12 is installed through bolts 5, which is convenient for the disassembly and assembly of the differential, enabling maintenance personnel to quickly replace the components of the differential. At the same time, it is convenient for cutting processing; the coil 61 in the fixing part 6 generates a magnetic field after being energized, and the magnetic field direction on the magnet ring 73 is opposite to the magnetic field direction of the coil 61, so that a repulsive force is generated between the coil 61 and the magnet ring 73, and the locking ring 7 is pushed away from the coil 61; the spline tooth one 211 and the spline tooth two 71 are engaged with each other, so that the locking ring 7 locks the half-shaft gear 2; the guide block 72 and the guide groove 121 cooperate to guide and limit the locking ring 7, preventing the half-shaft gear 2 from driving the locking ring 7 to rotate, resulting in the locking ring 7 being unable to play a locking role.
[0022] As Figures 1 to 4 shown, a limit block 721 is provided on the guide block 72, and a limit groove 122 is provided on the guide groove 121. The limit block 721 and the limit groove 122 cooperate to bear the reaction force generated when the locking ring 7 stops the half-shaft gear 2. Reduce the load on the guide block 72 and the guide groove 121.
[0023] As Figures 2 to 4 shown, a fillet one 74 is provided at the connection of the guide block 72 and the limit block 721, and a fillet two 123 is provided at the connection of the guide groove 121 and the limit groove 122. The fillet one 74 and the fillet two 123 cooperate to make the force between the guide block 72 and the limit block 721, and between the guide groove 121 and the limit groove 122 more uniform, preventing the connection between the guide block 72 and the limit block 721 from breaking when the locking ring 7 locks the half-shaft gear 2, and extending the service life of the locking ring 7.
[0024] As shown Figures 1 to 3 in FIG. 2, an installation hole 722 is formed in the guide block 72, a return spring 8 is installed in the installation hole 722, a return column 9 is connected to the return spring 8, and the return column 9 abuts against the guide groove 121. The return spring 8 and the return column 9 cooperate. After the coil 61 is powered off, under the action of the return spring 8 and the return column 9, the locking ring 7 is pushed back to its original position, and the locking of the locking ring 7 on the half shaft gear 2 is released.
[0025] As shown Figures 1 to 3 in FIG. 3, a round head 91 is provided at the top of the return column 9, a buffer pad 911 is installed on the round head 91, and a round bottom hole 121a is provided on the guide groove 121. The round head 91 facilitates the cooperation with the round bottom hole 121a to disperse the impact force generated when the locking ring 7 is pushed by the coil 61. The buffer pad 911 is used to absorb the impact, prevent the locking ring 7 from colliding with the guide groove 121 and the limit groove 122 during rapid movement, reduce the generation of noise, improve comfort, and extend the service life of the locking ring 7.
[0026] As shown Figure 2 and Figure 3 in FIGS. 4 and 5, the return column 9 is provided with guide vanes 92, and a guide groove 722a is formed in the installation hole 722. The guide vanes 92 cooperate with the guide groove 722a to limit the moving direction of the return column 9, prevent the return column 9 of the round head 91 from being deflected by the return spring 8 during the movement of the locking ring 7, and cause the return column 9 to be unable to smoothly enter the round bottom hole 121a.
[0027] As shown Figures 2 to 4 in FIG. 6, a first magnet sheet 723 is fixed on the guide block 72, and a second magnet sheet 121b is arranged at the coil 61 end of the guide groove 121. The first magnet sheet 723 and the second magnet sheet 121b are used to position the locking ring 7, ensure the position of the locking ring 7 when the coil 61 is not powered on, prevent the locking ring 7 from shifting due to the vibration during the operation of the vehicle, cause the locking ring 7 to engage with the half shaft gear 2, and prevent the vehicle from experiencing a jerky feeling during driving.
[0028] The working principle of the present utility model: When it is necessary to lock the differential, turn on the switch and energize the coil 61. After the coil 61 is energized, a magnetic field is generated. Since the magnetic field of the energized coil 61 is opposite to the magnetic field of the magnet ring 73 on the locking ring 7, a repulsive force appears between the coil 61 and the locking ring 7. The locking ring 7 moves towards the extension portion 21 of the half shaft gear 2 due to the repulsive force, so that the first spline tooth 211 on the locking ring 7 meshes with the second spline tooth 71 of the extension portion 21. At the same time, the return column 9 abuts against the round bottom hole 121a, and the return spring 8 is compressed, and the half shaft gear 2 stops rotating, further locking the differential; after the coil 61 is powered off, the return spring 8 extends, causing the locking ring 7 to return to the fixed portion 6, and the first magnet sheet 723 on the locking ring 7 fits with the second magnet sheet 121b in the housing 1 to fix the locking ring 7.
[0029] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art to which the present utility model pertains may make various modifications or supplements to the described specific embodiments or use similar means for substitution, but they will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.
[0030] Although various terms are used more frequently herein, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.
Claims
1. An electromagnetic locking differential, comprising a housing (1), wherein a half shaft gear (2), a planet gear (3) and a planet shaft (4) are installed in the housing (1), and a wheel shaft (11) penetrates through the half shaft gear (2), and is characterized in that: The housing (1) is divided into a first housing (12) and a second housing (13). Installation openings (131) are provided at both ends of the second housing (13). Both ends of the installation openings (131) are fixedly connected to the first housing (12) by bolts (5). An installation groove (14) is provided inside the first housing (1). A fixing part (6) is installed in the installation groove (14), and a coil (61) is installed in the fixing part (6). An extension part (21) is provided on the half shaft gear (2), and a first spline tooth (211) is provided on the outer surface of the extension part (21). A locking ring (7) is installed in front of the opening of the installation groove (14). A second spline tooth (71) is provided inside the locking ring (7). Guide blocks (72) are provided on the outer surface of the locking ring (7). A guide groove (121) is provided in the first housing (12). A magnet ring (73) is provided on the end surface of the coil (61) of the locking ring (7).
2. The electromagnetic locking differential according to claim 1, wherein A limiting block (721) is provided on the guide block (72), and a limiting groove (122) is provided on the guide groove (121).
3. The electromagnetic locking differential according to claim 1, wherein A first fillet (74) is provided at the connection between the guide block (72) and the limiting block (721), and a second fillet (123) is provided at the connection between the guide groove (121) and the limiting groove (122).
4. An electromagnetic locking differential according to claim 1, wherein, An installation hole (722) is provided inside the guide block (72), a return spring (8) is installed in the installation hole (722), a return column (9) is connected to the return spring (8), and the return column (9) abuts against the guide groove (121).
5. An electromagnetic locking differential according to claim 4, characterized in that, A round head (91) is provided at the top of the return column (9), a buffer pad (911) is installed on the round head (91), and a round bottom hole (121a) is provided on the guide groove (121).
6. The electromagnetic locking differential according to claim 4, characterized in that, The return column (9) is provided with guide vanes (92), and a guiding groove (722a) is provided on the installation hole (722).
7. An electromagnetic locking differential according to claim 1, characterized in that, A first magnet sheet (723) is fixed on the guide block (72), and a second magnet sheet (121b) is provided at the end of the coil (61) of the guide groove (121).