Electromagnetic differential lock assembly

Abstract

The electromagnetic differential lock assembly comprises a shell assembly and a bolt, the shell assembly is formed by butt joint of a left shell and a right shell, an electromagnetic coil assembly and a check ring are arranged at the top end of the left shell, a top block is movably connected to the top of the left shell in a penetrating mode, a spring limiting hole is formed in the left shell, and a spring is arranged in the spring limiting hole. A spring limiting hole is formed in the right shell, a spring sleeve is arranged in the spring limiting hole, a counterbore is formed in the right shell, and the differential mechanism further comprises a transmission assembly which is arranged in the shell assembly.The differential mechanism has the beneficial effects that the implementation mode of the locking function of the differential mechanism is changed, the situation that locking fails due to the fact that the performance is affected by spring abrasion is reduced, and the service life of the differential mechanism is prolonged. And the locking reaction is quicker, the structure of the differential mechanism is simplified, and the machining and manufacturing cost and the assembly difficulty of differential mechanism parts are reduced.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, and more particularly to an electromagnetic differential lock assembly. Background Technology

[0002] As one of the core components of a car's drive system, the differential effectively solves the problem of wheel speed differences between the drive wheels under harsh working conditions and turning conditions, ensuring vehicle stability during driving and effectively reducing tire damage.

[0003] The core of the locking function is the differential lock device in the differential. The design of the differential lock in the electromagnetic differential lock is based on the principle of electromagnetic induction. The generated electromagnetic force acts on the internal components of the differential to achieve the differential adjustment function. The locking device is mostly composed of coil, drive plate, locking plate and connecting parts.

[0004] According to Chinese patent CN113915310A, regarding differential locking structure, some existing electronically controlled differential locks, regardless of whether they are locked or unlocked, will have relative movement between the drive disc and the electromagnetic coil, which will increase the wear and tear of the electronically controlled differential lock during idling and operation. Summary of the Invention

[0005] To solve the above problems, the present invention provides an electromagnetic differential lock assembly, which is achieved through the following technical solution.

[0006] An electromagnetic differential lock assembly includes a housing assembly and bolts. The housing assembly is formed by connecting a left housing and a right housing. An electromagnetic coil assembly and a retaining ring are provided at the top of the left housing. A top block is movably connected to the top of the left housing. A spring limiting hole is provided on the left housing, and a spring sleeve is provided inside the spring limiting hole. A countersunk hole is provided on the right housing. The assembly also includes a transmission assembly, which is located inside the housing assembly. The transmission assembly includes a cross shaft, a half-shaft gear, a second adjusting shim, a locking half-shaft gear, a locking plate, and planetary gears. The locking plate is provided with locking plate external teeth and locking plate internal teeth, and the locking half-shaft gear is provided with locking teeth.

[0007] Preferably, the outer surface of the left housing has a first threaded hole, the outer surface of the right housing has a second threaded hole, one end of the bolt is connected through the first threaded hole and the second threaded hole, and the left housing and the right housing are fixed together by the through bolt.

[0008] Preferably, the top of the left housing has a top block groove, the top block passes through the top block groove and is movably connected to the left housing, the top blocks are four in a ring, and the two ends of the top blocks contact the electromagnetic coil assembly and the locking plate.

[0009] Preferably, a locking plate positioning hole is provided on the left housing, and the locking plate external teeth provided on the half-shaft gear are embedded in the locking plate positioning hole.

[0010] Preferably, the left housing has a first cross shaft mounting hole, the right housing has a second cross shaft mounting hole, and the cross shaft is limited within the limiting hole formed by the mating of the first cross shaft mounting hole and the second cross shaft mounting hole.

[0011] Preferably, the outer surface of the left housing is provided with a retaining ring groove, the retaining ring is limited and engaged in the retaining ring groove, and the retaining ring is pressed against the top of the electromagnetic coil assembly.

[0012] Preferably, one end of the spring sleeve that is embedded inside the spring limiting hole has a positioning hole, and one end of the spring is limited within the positioning hole.

[0013] Preferably, four planetary gears are provided, and the planetary gears are limited and connected to the cross shaft by a spherical washer, and the planetary gears are meshed between the half-shaft gear and the locking half-shaft gear.

[0014] Preferably, the locking teeth engage with the inner teeth of the locking plate.

[0015] Preferably, the half-shaft gear is provided with a first adjusting shim, and the first adjusting shim is pressed between the right housing and the half-shaft gear.

[0016] The beneficial effects of this invention are:

[0017] 1. The method of implementing the differential locking function has been changed, which reduces the possibility of locking failure due to spring wear affecting performance, and the locking response is more rapid.

[0018] 2. The structure of the differential has been simplified, reducing the manufacturing cost of differential parts and the difficulty of assembly.

[0019] 3. The left and right housings, locking half-shaft gears and half-shaft gears can be disassembled and assembled, which facilitates disassembly and maintenance, and also facilitates the replacement and recycling of parts. Attached Figure Description

[0020] To more clearly illustrate the technical solution of the present invention, the accompanying drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 : A cross-sectional view of a novel electromagnetic differential lock assembly according to the present invention;

[0022] Figure 2 : An exploded view of a novel electromagnetic differential lock assembly according to the present invention;

[0023] Figure 3 : A three-dimensional schematic diagram of the spring sleeve described in this invention;

[0024] Figure 4 : A three-dimensional schematic diagram of the left shell of the present invention;

[0025] Figure 5 : A three-dimensional schematic diagram of the right shell of the present invention;

[0026] Figure 6 : A three-dimensional schematic diagram of the locking half-shaft gear of the present invention;

[0027] Figure 7 : A three-dimensional schematic diagram of the locking plate of the present invention from another angle.

[0028] The attached figures are labeled as follows:

[0029] 1. Cross shaft; 2. Spherical washer; 3. Half-shaft gear; 4. First adjusting shim; 6. Spring sleeve; 601. Positioning hole; 7. Retaining ring; 8. Left housing; 801. First cross shaft mounting hole; 802. Top block groove; 803. Locking plate positioning hole; 804. Snap ring groove; 805. First threaded hole; 806. Spring limiting hole; 9. Right housing; 901. Countersunk hole; 902. Second cross shaft mounting hole; 903. Second threaded hole; 10. Spring; 11. Second adjusting shim; 12. Locking half-shaft gear; 1201. Locking tooth; 13. Locking plate; 1301. Locking plate external tooth; 1302. Locking plate internal tooth; 14. Planetary gear; 15. Top block; 16. Bolt; 17. Electromagnetic coil assembly. Detailed Implementation

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] like Figure 1-7 As shown, the present invention has the following specific embodiments.

[0032] An electromagnetic differential lock assembly includes a housing assembly and bolts 16. The housing assembly is formed by connecting a left housing 8 and a right housing 9. An electromagnetic coil assembly 17 and a retaining ring 7 are provided at the top of the left housing 8. A top block 15 is movably connected to the top of the left housing 8. A spring limiting hole 806 is provided on the left housing 8, and a spring sleeve 6 is provided inside the spring limiting hole 806. A countersunk hole 901 is provided on the right housing 9. The assembly also includes a transmission assembly, which is located inside the housing assembly. The transmission assembly includes a cross shaft 1, a half-shaft gear 3, a second adjusting shim 11, a locking half-shaft gear 12, a locking plate 13, and a planetary gear 14. The locking plate 13 is provided with locking plate external teeth 1301 and locking plate internal teeth 1302, and the locking half-shaft gear 12 is provided with locking teeth 1201.

[0033] Preferably, the outer surface of the left housing 8 has a first threaded hole 805, and the outer surface of the right housing 9 has a second threaded hole 903. One end of the bolt 16 passes through and is connected to the second threaded hole 903 and the first threaded hole 805. The left housing 8 and the right housing 9 are fixed together by the through bolt 16. The first threaded holes 805 and 903 can both pass through the bolt 16, so that the left housing 8 and the right housing 9 can be locked and fixed by the bolt 16.

[0034] Preferably, the top of the left housing 8 is provided with a top block groove 802, and the top block 15 passes through the top block groove 802 and is movably connected to the left housing 8. There are four top blocks 15 arranged in a ring, and the two ends of the top blocks 15 are in contact between the electromagnetic coil assembly 17 and the locking plate 13. The top block groove 802 can limit the sliding of the top block 15, so that the push block of the electromagnetic coil assembly 17 pushes the top block 15 to move.

[0035] Preferably, a locking plate positioning hole 803 is provided on the left housing 8, and the locking plate external tooth 1301 provided on the half shaft gear 3 is limited and embedded in the locking plate positioning hole 803. The locking plate positioning hole 803 can limit the locking plate external tooth 1301, so that the locking plate 13 can be limited to move within the left housing 8.

[0036] Preferably, the left housing 8 has a first cross shaft mounting hole 801 and the right housing 9 has a second cross shaft mounting hole 902. The cross shaft 1 is limited in the limiting hole formed by the first cross shaft mounting hole 801 and the second cross shaft mounting hole 902. The first cross shaft mounting hole 801 and the second cross shaft mounting hole 902 cooperate with each other to limit the cross shaft 1.

[0037] Preferably, a retaining ring groove 804 is provided on the outer surface of the left housing 8, and the retaining ring 7 is limited and engaged in the retaining ring groove 804, and the retaining ring 7 is pressed against the top of the electromagnetic coil assembly 17. The retaining ring groove 804 can limit the connection of the retaining ring 7.

[0038] Preferably, the spring sleeve 6 is embedded in the spring limiting hole 806 at one end and has a positioning hole 601. One end of the spring 10 is limited in the positioning hole 601. The spring 10 connected to the spring sleeve 6 can be supported on the locking plate 13, so that the locking plate 13 can be reset without external force.

[0039] Preferably, four planetary gears 14 are provided. The planetary gears 14 are limited and connected to the cross shaft 1 by the provided spherical washers 2, and the planetary gears 14 are meshed between the half shaft gear 3 and the locking half shaft gear 12. The planetary gears 14 can mesh between the locking half shaft gear 12 and the half shaft gear 3, so that the locking half shaft gear 12 can drive the half shaft gear 3 for transmission through the planetary gears 14.

[0040] Preferably, the locking tooth 1201 meshes with the inner tooth 1302 of the locking plate, and the meshing of the locking tooth 1201 and the inner tooth 1302 of the locking plate enables the locking plate 13 and the locking half-shaft gear 12 to mesh and lock together.

[0041] Preferably, a first adjusting shim 4 is provided on the half-shaft gear 3, and the first adjusting shim 4 is pressed between the right housing 9 and the half-shaft gear 3. The first adjusting shim 4 can limit the adjustment between the connected half-shaft gear 3 and the right housing 9.

[0042] The overall working principle of this invention is as follows:

[0043] like Figure 1 As shown, when energized, the coil on the electromagnetic coil assembly 17 generates electromagnetic force, causing the push block in the assembly to push the top block 15, and the top block 15 to push the locking plate 13, thereby overcoming the elastic force of the spring 10, so that the locking plate 13 engages with the locking half shaft gear 12, thereby forming a whole inside the differential, thus realizing the locking function of the differential.

[0044] When the power is off, the electromagnetic coil assembly 17 no longer provides electromagnetic force. At this time, the spring 10 that is in action is compressed and generates elastic force. At this time, the spring 10 returns to its original position. Under the action of elastic force, the locking plate 13 is fixed at its initial position. The locking plate 13 is disengaged from the locking half shaft gear 12, and the differential lock function is disengaged.

[0045] In summary, when the locking plate 13 inside the left housing 8 is engaged with the locking half-shaft gear 12, the locking plate 13 can drive the engaged locking half-shaft gear 12 to rotate. Since the locking half-shaft gear 12 is engaged with the planetary gear 14, and the planetary gear 14 is engaged with the half-shaft gear 3, the locking half-shaft gear 12 can drive the connected half-shaft gear 3 to rotate, thereby enabling speed reduction transmission within the housing assembly through the transmission assembly.

[0046] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An electromagnetic differential lock assembly, comprising a housing assembly and bolts (16), characterized in that, The outer shell assembly is formed by connecting a left shell (8) and a right shell (9). The top of the left shell (8) is provided with an electromagnetic coil assembly (17) and a retaining ring (7). The top of the left shell (8) is movably connected to a top block (15). The left shell (8) is provided with a spring limiting hole (806). The spring limiting hole (806) is provided with a spring sleeve (6). The right shell (9) is provided with a countersunk hole (901). The assembly also includes a transmission assembly, which is located inside the outer shell assembly. The transmission assembly includes a cross shaft (1), a half-shaft gear (3), a second adjusting shim (11), a locking half-shaft gear (12), a locking plate (13), and a planetary gear (14). The locking plate (13) is provided with locking plate external teeth (1301) and locking plate internal teeth (1302). The locking half-shaft gear (12) is provided with locking teeth (1201).

2. The electromagnetic differential lock assembly according to claim 1, characterized in that, The outer surface of the left housing (8) is provided with a first threaded hole (805), and the outer surface of the right housing (9) is provided with a second threaded hole (903). One end of the bolt (16) is connected through the second threaded hole (903) and the first threaded hole (805), and the left housing (8) and the right housing (9) are fixed together by the through bolt (16).

3. The electromagnetic differential lock assembly according to claim 1, characterized in that, The top of the left housing (8) is provided with a top block groove (802). The top block (15) passes through the top block groove (802) and is movably connected to the left housing (8). There are four top blocks (15) arranged in a ring, and the two ends of the top blocks (15) are in contact between the electromagnetic coil assembly (17) and the locking plate (13).

4. The electromagnetic differential lock assembly according to claim 1, characterized in that, The left housing (8) has a locking plate positioning hole (803), and the locking plate external teeth (1301) on the half shaft gear (3) are limited and embedded in the locking plate positioning hole (803).

5. An electromagnetic differential lock assembly according to claim 1, characterized in that, The left housing (8) has a first cross shaft mounting hole (801), and the right housing (9) has a second cross shaft mounting hole (902). The cross shaft (1) is limited within the limiting hole formed by the first cross shaft mounting hole (801) and the second cross shaft mounting hole (902).

6. An electromagnetic differential lock assembly according to claim 1, characterized in that, The outer surface of the left housing (8) is provided with a retaining ring groove (804), the retaining ring (7) is limited and engaged in the retaining ring groove (804), and the retaining ring (7) is pressed against the top of the electromagnetic coil assembly (17).

7. An electromagnetic differential lock assembly according to claim 1, characterized in that, The spring sleeve (6) is embedded in the spring limiting hole (806) at one end, and a positioning hole (601) is provided at one end, and one end of the spring (10) is limited in the positioning hole (601).

8. An electromagnetic differential lock assembly according to claim 1, characterized in that, The planetary gears (14) are provided in four parts. The planetary gears (14) are connected to the cross shaft (1) by means of a spherical washer (2) and are meshed between the half shaft gear (3) and the locking half shaft gear (12).

9. An electromagnetic differential lock assembly according to claim 1, characterized in that, The locking tooth (1201) engages with the inner tooth (1302) of the locking plate.

10. An electromagnetic differential lock assembly according to claim 1, characterized in that, The half-shaft gear (3) is provided with a first adjusting shim (4), and the first adjusting shim (4) is pressed between the right housing (9) and the half-shaft gear (3).

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