Shaft sleeve type transmission mechanism and electromagnetic clutch

Abstract

The invention discloses a shaft sleeve type transmission mechanism and an electromagnetic clutch, and the shaft sleeve type transmission mechanism comprises a middle shaft, a shaft sleeve and a gear shaft; the gear shaft rotationally sleeves the middle shaft, and a first tooth row structure is arranged on the peripheral surface of the gear shaft; the shaft sleeve is movably sleeved on the middle shaft along the axial direction of the shaft sleeve, and part of the sleeve section is sleeved on the gear shaft; a second tooth row structure capable of being meshed with the first tooth row structure is arranged on the inner circumferential face of the shaft sleeve. A reset elastic piece is connected between the shaft sleeve and the middle shaft; the reset elastic piece is used for providing elastic acting force for resetting movement of the shaft sleeve in the axial direction of the shaft sleeve. A first stop part is arranged on the peripheral surface of the gear shaft and can be in contact with and abut against the shaft sleeve; when the shaft sleeve abuts against the first stop part in a contact mode, the first tooth row structure and the second tooth row structure are completely meshed. And meshing is carried out in a tooth row structure form, so that the combining and separating path is shortened, the meshing time is shortened, and the response time is shortened under the condition that enough torque transmission capacity is achieved.

Description

Technical Field

[0001] The present application relates to the field of automobile transmission technology, and in particular to a shaft sleeve type transmission mechanism and an electromagnetic clutch. Background Art

[0002] A clutch, typically located between the engine and transmission, acts like a switch, temporarily disconnecting or connecting the power transmission between the engine and transmission. During operation, the clutch's active and passive parts can temporarily disconnect and gradually connect, and may even rotate relative to each other during transmission.

[0003] An electromagnetic clutch is a type of clutch that primarily controls the engagement and disengagement of the clutch by switching the coil on and off. The response time and torque transmission capacity of the power transmission components affect the effectiveness of power transmission. The speed of the response time is related to the distance between the power transmission components when they engage or disengage. Existing electromagnetic clutches typically have thicker teeth to ensure adequate torque transmission. However, the path of engagement or disengagement is related to the tooth thickness: thicker teeth require a longer path for the teeth to travel, resulting in a longer response time. In the rotating state, the friction generated between the two due to the different speeds further increases the response time. Summary of the Invention

[0004] In view of this, the purpose of this application is to provide a shaft sleeve transmission mechanism and an electromagnetic clutch to ensure sufficient torque transmission capacity and accelerate the response time.

[0005] In order to achieve the above technical objectives, the present application provides a shaft-sleeve type transmission mechanism, comprising a central shaft, a shaft sleeve and a gear shaft;

[0006] The gear shaft is rotatably mounted on the central shaft, and a first gear row structure is provided on the outer peripheral surface;

[0007] The shaft sleeve is movably mounted on the central shaft along its own axial direction, and a portion of the sleeve is mounted on the gear shaft;

[0008] The inner circumference of the sleeve is provided with a second tooth row structure capable of engaging with the first tooth row structure;

[0009] A reset elastic member is connected between the shaft sleeve and the central shaft;

[0010] The reset elastic member is used to provide an elastic force for the shaft sleeve to reset along its own axial direction;

[0011] A first stopper is provided on the outer circumferential surface of the gear shaft, which can contact and abut against the shaft sleeve;

[0012] When the shaft sleeve contacts and abuts against the first stop portion, the first tooth row structure and the second tooth row structure are fully engaged.

[0013] Furthermore, the outer peripheral surface of the central shaft is provided with a first elastic limiting portion;

[0014] The inner circumference of the sleeve is provided with a second elastic limiting portion corresponding to the first elastic limiting portion;

[0015] The resetting elastic member is installed between the first elastic limiting portion and the second elastic limiting portion, and two ends thereof are in contact with and abut against the first elastic limiting portion and the second elastic limiting portion respectively.

[0016] Furthermore, there are multiple resetting elastic members, which are evenly distributed around the circumference of the central axis.

[0017] Furthermore, the reset elastic member is a compression spring.

[0018] Furthermore, a first retaining ring groove is provided on the outer peripheral surface of the central shaft located at the shaft section of the sleeve away from the gear shaft;

[0019] The first retaining spring groove is provided with a first retaining spring member;

[0020] The first clamping spring can contact and abut against the shaft sleeve.

[0021] The present application also discloses an electromagnetic clutch, comprising an electromagnetic coil assembly, a push ring assembly and the shaft sleeve type transmission mechanism;

[0022] The push ring assembly is mounted on the shaft sleeve of the shaft sleeve type transmission mechanism;

[0023] The electromagnetic coil assembly is installed outside the push ring assembly, and is used to drive the push ring assembly to move by the electromagnetic force generated by power supply, so as to drive the sleeve to move along its own axial direction close to the gear shaft.

[0024] Furthermore, the push ring assembly includes a push ring inner ring and a push ring outer ring;

[0025] The inner ring of the push ring is fixed on the outer peripheral surface of the shaft sleeve;

[0026] The outer ring of the push ring is fixed on the outer circumferential surface of the inner ring of the push ring.

[0027] Furthermore, a second stopper is provided on the outer peripheral surface of the sleeve;

[0028] The second stop portion contacts and abuts against one end of the inner ring of the push ring;

[0029] A second retaining ring groove is also provided on the outer peripheral surface of the shaft sleeve;

[0030] A second clamping spring member is installed on the second clamping spring groove;

[0031] The second clamping spring contacts and abuts against the other end of the inner ring of the push ring;

[0032] A third stopper is provided on the outer peripheral surface of the inner ring of the push ring and abuts against one end of the outer ring of the push ring.

[0033] Furthermore, the electromagnetic coil assembly includes an end cover, a coil member and a housing;

[0034] The end cover and the housing are coaxially arranged and connected to each other;

[0035] The coil member is installed between the end cover and the housing and is wound with a winding cloth.

[0036] Furthermore, a fixing block is fixed outside the shell;

[0037] The fixing block is provided with a first wire through hole;

[0038] The housing is provided with a second wire through hole which passes through the housing and is connected to the first wire through hole;

[0039] The fixing block is used to fix the wires connected to the coil member.

[0040] It can be seen from the above technical solutions that the shaft sleeve type transmission mechanism designed in this application redesigns the traditional full tooth structure into a first tooth row structure and a second tooth row structure composed of multiple small rows of teeth with a certain tooth thickness, which are engaged in the form of a tooth row structure, greatly shortening the path between the mutual engagement or separation of the gear shaft and the shaft sleeve (power transmission component), greatly reducing the engagement time, and indirectly shortening the friction path, further reducing the engagement time, so that the response time is greatly accelerated when it has sufficient torque transmission capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0042] Figure 1 A main cross-sectional view of an electromagnetic clutch provided in this application;

[0043] Figure 2 for Figure 1 A magnified diagram of position A in the middle;

[0044] Figure 3 Based on Figure 1 The cross-sectional view of the section line a in the figure;

[0045] Figure 4Based on Figure 1 Cross-sectional view of line b in the figure;

[0046] Figure 5 A three-dimensional diagram of a shaft sleeve of a shaft sleeve type transmission mechanism provided in this application, with 1 / 4 of the shaft sleeve cut away;

[0047] Figure 6 A three-dimensional diagram of a gear shaft of a sleeve-type transmission mechanism provided in this application;

[0048] Figure 7 A three-dimensional diagram of a central shaft of a shaft-sleeve type transmission mechanism provided in this application;

[0049] In the figure: 1. electromagnetic coil assembly; 2. push ring assembly; 3. bushing; 31. internal spline structure; 4. gear shaft; 5. center shaft; 51. external spline structure; 6. first bearing; 7. return spring; 8. second retaining spring; 9. first retaining spring; 10. second bearing; 11. end cap; 12. coil assembly; 13. threaded fastener; 14. wrapping cloth; 15. fixing block; 151. first wire hole; 16. housing; 161. second wire hole; 21. Push ring inner ring; 22. Push ring outer ring; 301. Second limiting groove; 501. First limiting groove; 601. Bearing groove; 701. Reset elastic groove; 801. Second retaining spring groove; 901. First retaining spring groove; 302. Second tooth row structure; 402. First tooth row structure; 303. Second stop part; 403. First stop part; 305. Second elastic limiting part; 505. First elastic limiting part; 214. Third stop part. DETAILED DESCRIPTION

[0050] The following will clearly and completely describe the technical solutions of the embodiments of the present application in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present application, not all of them. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the embodiments of the present application.

[0051] In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0052] In the description of the embodiments of the present application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, replaceable connections, or integral connections. They can also refer to mechanical connections or electrical connections. They can also refer to direct connections or indirect connections through an intermediate medium. They can also refer to internal connections between two components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0053] The embodiments of the present application disclose a shaft sleeve transmission mechanism and an electromagnetic clutch.

[0054] See also Figure 1 、 2 5 to 7, an embodiment of a shaft sleeve type transmission mechanism provided in the embodiments of the present application includes:

[0055] Middle shaft 5, bushing 3 and gear shaft 4.

[0056] The gear shaft 4 is rotatably mounted on the central shaft 5 , and a first gear row structure 402 is provided on the outer peripheral surface thereof.

[0057] Specifically, if Figure 1 As shown, the gear shaft 4 is rotatably connected to the center shaft 5 via a first bearing 6, wherein the first bearing 6 may be a cylindrical roller bearing (wherein a bearing groove 601 for mounting the first bearing 6 is provided in the gear shaft 4). A second bearing 10 is mounted on both the end of the gear shaft 4 away from the center shaft 5 and the end of the center shaft 5 away from the gear shaft 4. The second bearing 10 may be a ball bearing. Figure 6 As shown, the first tooth row structure 402 is composed of a plurality of small rows of teeth with a certain tooth thickness, and the small row of teeth is a gear ring structure distributed around the outer circumference of the gear shaft 4.

[0058] The shaft sleeve 3 is movably mounted on the central shaft 5 along its own axial direction, and a portion of the sleeve is mounted on the gear shaft 4.

[0059] Specifically, if Figure 5 As shown, the inner circumference of the sleeve 3 is provided with an internal spline structure 31 for cooperating with the external spline structure 51 on the central shaft 5 to achieve movable arrangement along its own axial direction.

[0060] The inner circumference of the sleeve 3 is provided with a second tooth row structure 302 that can mesh with the first tooth row structure 402; Figure 5 As shown, the second tooth row structure 302 is also composed of a plurality of small rows of teeth with a certain tooth thickness, and the small row of teeth is a gear ring structure distributed around the inner circumference of the shaft sleeve 3.

[0061] A reset elastic member 7 is connected between the shaft sleeve 3 and the central shaft 5. The reset elastic member 7 is used to provide an elastic force for the shaft sleeve 3 to reset along its own axial direction.

[0062] A first stopper 403 is provided on the outer circumference of the gear shaft 4 and can contact and abut against the sleeve 3 ; when the sleeve 3 contacts and abuts against the first stopper 403 , the first tooth row structure 402 is fully engaged with the second tooth row structure 302 .

[0063] like Figure 2 As shown in FIG. 6 , the first stop portion 403 is an annular step structure.

[0064] The shaft sleeve type transmission mechanism designed in the present application redesigns the traditional full tooth structure into a first tooth row structure 402 and a second tooth row structure 302 composed of multiple small rows of teeth with a certain tooth thickness, which are engaged in the form of a tooth row structure, greatly shortening the path between the mutual engagement or separation of the gear shaft 4 and the shaft sleeve 3 (power transmission component), greatly reducing the engagement time, and indirectly shortening the friction path, further reducing the engagement time, so that the response time is greatly accelerated when it has sufficient torque transmission capacity.

[0065] The above is the first embodiment of a shaft sleeve transmission mechanism provided by the embodiment of the present application. The following is the second embodiment of a shaft sleeve transmission mechanism provided by the embodiment of the present application. For details, please refer to Figures 1 to 7 .

[0066] Based on the solution of the above embodiment 1:

[0067] Furthermore, a first elastic limiting portion 505 is provided on the outer circumference of the central shaft 5 ; and a second elastic limiting portion 305 corresponding to the first elastic limiting portion 505 is provided on the inner circumference of the shaft sleeve 3 .

[0068] like Figure 1 、 2 as well as Figure 7 As shown, the first elastic limiting portion 505 is a structure that limits the left end of the resetting elastic member 7. Specifically, a first limiting groove 501 is provided on the central shaft 5 along its own axial direction, wherein one end of the first limiting groove 501 is open and the other end is closed, and the closed end forms the first elastic limiting portion 505.

[0069] like Figure 1 、 2 as well as Figure 5 As shown, the second elastic limiting portion 305 is a structure that limits the right end of the resetting elastic member 7. Specifically, a second limiting groove 301 is provided in the shaft sleeve 3 along its own axial direction, wherein one end of the second limiting groove 301 is open and the other end is closed, and the closed end forms the second elastic limiting portion 305.

[0070] The resetting elastic member 7 is installed between the first elastic limiting portion 505 and the second elastic limiting portion 305 , and two ends thereof are in contact with and abut against the first elastic limiting portion 505 and the second elastic limiting portion 305 respectively.

[0071] like Figure 2 As shown, the first limiting groove 501 and the second limiting groove 301 form a reset elastic groove 701 for accommodating the reset elastic member 7 .

[0072] Furthermore, in order to improve the elastic reset effect, the reset elastic member 7 can be designed to be multiple and evenly distributed around the circumference of the central axis 5. Correspondingly, the first limiting groove 501 and the second limiting groove 301 are also multiple, corresponding to the reset elastic member 7 one by one.

[0073] Furthermore, the resetting elastic member 7 is a compression spring, which is easy to install and simple to maintain.

[0074] Furthermore, if Figure 2 As shown, the outer circumference of the central shaft 5, located on the shaft section of the sleeve 3 away from the gear shaft 4, is provided with a first retaining spring groove 901. Nine first retaining springs are installed in the first retaining spring groove 901. These first retaining springs can contact and abut against the sleeve 3. The use of these nine first retaining springs to positionally secure the sleeve 3 facilitates installation and removal, and facilitates disassembly and maintenance of the sleeve 3.

[0075] like Figures 1 to 7 As shown, the present application also discloses an electromagnetic clutch comprising an electromagnetic coil assembly 1, a push ring assembly 2, and a sleeve-type transmission mechanism; the push ring assembly 2 is mounted on a sleeve 3 of the sleeve-type transmission mechanism; the electromagnetic coil assembly 1 is mounted outside the push ring assembly 2 and is used to drive the push ring assembly 2 to move along its own axial direction toward the gear shaft 4 through the electromagnetic force generated by energization. It is understood that the electromagnetic coil assembly 1 itself is stationary, and it is the electromagnetic force generated by energization that drives the push ring assembly 2 to move, thereby driving the sleeve 3 to move.

[0076] Furthermore, if Figures 1 to 4 As shown, the push ring assembly 2 includes a push ring inner ring 21 and a push ring outer ring 22; the push ring inner ring 21 is sleeved on the outer circumference of the shaft sleeve 3; the push ring outer ring 22 is sleeved on the outer circumference of the push ring inner ring 21. It should be noted that in order to achieve faster response time, the push ring inner ring 21 and the push ring outer ring 22 are interference fit and are relatively fixed to the left end of the push ring inner ring 21.

[0077] In addition, the outer ring 22 of the push ring in the present application is designed with a magnetic material, while the inner ring 21 of the push ring is designed with a non-magnetic material.

[0078] Furthermore, if Figure 2As shown, a second stop portion 303 is provided on the outer circumferential surface of the sleeve 3; the second stop portion 303 contacts and abuts against one end of the push ring inner ring 21; the second stop portion 303 is used to limit the left end of the push ring inner ring 21, and it is an annular step structure.

[0079] A second retaining spring groove 801 is also provided on the outer circumference of the sleeve 3. A second retaining spring 8 is mounted on the second retaining spring groove 801. The second retaining spring 8 contacts and abuts against the other end of the push ring inner ring 21. The second retaining spring 8 is used to positionally limit the right end of the push ring inner ring 21. This method of retaining the push ring inner ring 21 facilitates installation and removal, and facilitates disassembly and maintenance of the sleeve 3.

[0080] In the present application, the limiting design of the first stop portion 403 and the second stop portion 303 is a shoulder limit. This limiting method has a simple structure and accurate positioning. This limiting method is used to limit one end of the structural member to be limited; and then the first 9 retaining springs and the second 8 retaining springs are used to limit the other end of the structural member to be limited. While ensuring reliable limiting, it is also convenient for disassembly and maintenance of the structural member to be limited.

[0081] like Figure 2 As shown, a third stop portion 214 is provided on the outer circumference of the push ring inner ring 21, and contacts and abuts against one end of the push ring outer ring 22; the third stop portion 214 provided on the outer circumference of the push ring inner ring 21 is used to limit the left end of the push ring outer ring 22 (that is, the push ring inner ring 21 and the push ring outer ring 22 are relatively fixed to the left end of the push ring inner ring 21), and the third stop portion 214 is a boss structure.

[0082] When the electromagnetic coil assembly 1 is energized, it generates magnetic force, causing the outer ring 22 of the push ring to push against the third stop portion 214 of the push ring inner ring 21 and move to the left along the axis together with the push ring inner ring 21. As a result, the push ring assembly 2 moves to the left under the action of the electromagnetic force, and during the movement, the push ring inner ring 21 pushes against the second stop portion 303 of the sleeve 3 to drive the sleeve 3 to move to the left.

[0083] Furthermore, if Figures 1 to 4 As shown, the electromagnetic coil assembly 1 includes an end cover 11 , a coil member 12 and a housing 16 .

[0084] The end cover 11 and the housing 16 are coaxially arranged and connected to each other; the coil member 12 is installed between the end cover 11 and the housing 16 and is wound with a winding cloth 14 .

[0085] In the present application, the electromagnetic coil assembly 1 and the push ring assembly 2 can be designed with reference to existing design structures, and therefore will not be described in detail.

[0086] Furthermore, if Figure 1 As shown in FIG4 , a fixing block 15 is fixed to the outside of the housing 16 , and can be fixedly connected by a threaded fastener 13 (such as a cross countersunk screw), without limitation.

[0087] The fixing block 15 is provided with a first wire hole; the housing 16 is provided with a second wire hole that passes through the housing and connects to the first wire hole. The fixing block 15 is used to fix the wire connected to the coil 12. The fixing block 15 facilitates the fixation of the wire connected to the coil 12, ensuring the reliability of the circuit connection.

[0088] Here’s how it works:

[0089] 1. When energized, the electromagnetic coil assembly 1 forms a magnetic field. The generated electromagnetic force causes the outer ring 22 of the push ring inner ring 21 to move leftward along the axis together with the push ring inner ring 21, pressing against the third stop 214. During movement, the push ring inner ring 21 presses against the second stop 303 to push the sleeve 3 to move leftward along the axis (for faster response time, the push ring inner ring 21 is initially in a state of pressing against the second stop 303). During the leftward movement, the second row of teeth of the sleeve 3 and the first row of teeth of the gear shaft 4 rapidly engage within a certain speed difference. The second elastic limiter 305 begins to compress the reset elastic member 7, which then presses against the first elastic limiter 505 and continues to move leftward. When the left end face of the sleeve 3 presses against the first stop portion 403, the sleeve 3 and the push ring assembly 2 are restricted from continuing to move axially to the left, and the compression of the reset elastic member 7 reaches the maximum. At this time, the first tooth row and the second tooth row are fully engaged and can output sufficient torque smoothly. The mutual engagement or separation path of this process is very short, so that the engagement time is short and the response is fast.

[0090] 2. When power is removed, the magnetic field generated by the electromagnetic coil assembly 1 disappears, causing the electromagnetic force to dissipate. The reset spring 7 begins to return to its original position, and the resulting elastic force pushes the second elastic stop 305 to the right. The sleeve 3 begins to move rightward along its axis, and the second tooth row of the sleeve 3 and the first tooth row of the gear shaft 4 gradually separate. At this point, the second stop 303 presses against the third stop 214, which in turn presses against the left end face of the push ring outer ring 22. As a result, the reset spring 7 pushes the sleeve 3 axially during the reset process, driving the push ring assembly 2 to the right. The reset spring 7 stops when it reaches the first retaining spring 9, completing the reset.

[0091] The above is a detailed introduction to a shaft sleeve transmission mechanism and electromagnetic clutch provided by the present application. For those skilled in the art, according to the ideas of the embodiments of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A shaft sleeve transmission mechanism, characterized in that: It comprises a central shaft (5), a shaft sleeve (3) and a gear shaft (4); The gear shaft (4) is rotatably mounted on the central shaft (5), and a first gear row structure (402) is provided on the outer peripheral surface; The shaft sleeve (3) is movably sleeved on the central shaft (5) along its own axial direction, and a part of the sleeve section is sleeved on the gear shaft (4); The inner circumferential surface of the shaft sleeve (3) is provided with a second tooth row structure (302) capable of meshing with the first tooth row structure (402); A resetting elastic member (7) is connected between the shaft sleeve (3) and the central shaft (5); The resetting elastic member (7) is used to provide an elastic force for the shaft sleeve (3) to resetting along its own axial direction; A first stopper (403) is provided on the outer peripheral surface of the gear shaft (4), and is capable of contacting and abutting against the shaft sleeve (3); When the shaft sleeve (3) contacts and abuts against the first stop portion (403), the first tooth row structure (402) and the second tooth row structure (302) are fully meshed.

2. The shaft sleeve transmission mechanism according to claim 1, characterized in that: The outer peripheral surface of the central shaft (5) is provided with a first elastic limiting portion (505); The inner circumferential surface of the shaft sleeve (3) is provided with a second elastic limiting portion (305) arranged corresponding to the first elastic limiting portion (505); The resetting elastic member (7) is installed between the first elastic limiting portion (505) and the second elastic limiting portion (305), and two ends thereof are in contact with and abut against the first elastic limiting portion (505) and the second elastic limiting portion (305) respectively.

3. The shaft sleeve type transmission mechanism according to claim 1, characterized in that: There are a plurality of resetting elastic members (7) which are evenly distributed around the circumference of the central axis (5).

4. The shaft sleeve type transmission mechanism according to claim 1, characterized in that: The resetting elastic member (7) is a compression spring.

5. The shaft sleeve type transmission mechanism according to claim 1, characterized in that: A first retaining ring groove (901) is provided on the outer peripheral surface of the central shaft (5) at the shaft section of the shaft sleeve (3) away from the gear shaft (4); The first retaining spring groove (901) is installed with a first retaining spring (9); The first clamping spring (9) is capable of contacting and abutting against the shaft sleeve (3).

6. Electromagnetic clutch, characterized in that: It comprises an electromagnetic coil assembly (1), a push ring assembly (2) and a shaft sleeve transmission mechanism as claimed in any one of claims 1 to 5; The push ring assembly (2) is mounted on the shaft sleeve (3) of the shaft sleeve type transmission mechanism; The electromagnetic coil assembly (1) is mounted outside the push ring assembly (2) and is used to drive the push ring assembly (2) to move by means of electromagnetic force generated by power supply, thereby driving the shaft sleeve (3) to move along its own axial direction toward the gear shaft (4).

7. The electromagnetic clutch according to claim 6, characterized in that: The push ring assembly (2) comprises a push ring inner ring (21) and a push ring outer ring (22); The push ring inner ring (21) is sleeved and fixed on the outer peripheral surface of the shaft sleeve (3); The push ring outer ring (22) is sleeved on the outer circumferential surface of the push ring inner ring (21).

8. The electromagnetic clutch according to claim 7, characterized in that: A second stopper (303) is provided on the outer peripheral surface of the shaft sleeve (3); The second stopper (303) contacts and abuts against one end of the push ring inner ring (21); A second retaining ring groove (801) is also provided on the outer peripheral surface of the shaft sleeve (3); A second retaining spring (8) is installed on the second retaining spring groove (801); The second clamping spring (8) contacts and abuts against the other end of the push ring inner ring (21); A third stopper (214) is provided on the outer peripheral surface of the push ring inner ring (21) and abuts against one end of the push ring outer ring (22).

9. The electromagnetic clutch according to claim 8, characterized in that: The electromagnetic coil assembly (1) comprises an end cover (11), a coil member (12) and a housing (16); The end cover (11) and the housing (16) are coaxially arranged and connected to each other; The coil component (12) is installed between the end cover (11) and the housing (16), and is wound with a winding cloth (14).

10. The electromagnetic clutch according to claim 9, characterized in that: A fixing block (15) is fixed outside the housing (16); The fixing block (15) is provided with a first wire through hole; The housing (16) is provided with a second wire via hole penetrating the housing and connected to the first wire via hole; The fixing block (15) is used to fix the wire connected to the coil member (12).

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