The transmission mechanism of the motor relay and the motor relay

Abstract

This application relates to a transmission mechanism for a motor relay and the motor relay itself. The transmission mechanism includes a pusher and a transmission component; the transmission component is movably connected to the pusher and can rotate to drive the pusher to move along a first direction, thereby opening or closing the moving and stationary contacts of the motor relay; one of the pusher and the transmission component has a protruding drive shaft, and the other has a mounting hole for inserting the drive shaft. The drive shaft and the mounting hole are abutted in the first direction and clearance-fitted in the second direction, so that when the pusher moves along the first direction, it can also avoid the transmission component in the second direction; the first and second directions are perpendicular, and the plane containing both is parallel to the rotational surface of the transmission component. By setting the fit between the drive shaft and the mounting hole in the second direction to a clearance fit, this transmission mechanism avoids problems such as jamming, shaking, or slow response of the pusher during movement, improving the reliability and operational stability of the relay.

Description

Technical Field

[0001] This application relates to the field of motor relay technology, and in particular to a transmission mechanism and a motor relay. Background Technology

[0002] The motor relay is a new type of relay. Unlike electromagnetic relays and magnetic latching relays, it uses a miniature stepper motor as the drive mechanism to directly drive the contacts to close and open, rather than relying on an electromagnetic coil.

[0003] In existing technologies, a typical implementation involves a motor-driven gear reduction mechanism. The final gear drives a pusher, which in turn pushes a moving spring, causing the moving and stationary contacts to open and close. However, this pusher is prone to jamming, vibration, or slow response during actual operation, thus affecting the stable operation of the equipment. Utility Model Content

[0004] Therefore, it is necessary to provide a transmission mechanism for a motor relay and a motor relay to address the aforementioned technical problems.

[0005] A transmission mechanism for a motor relay, comprising:

[0006] Push card; and

[0007] A transmission component is movably connected to the push card. The transmission component can rotate to drive the push card to move in a first direction, thereby realizing the opening or closing of the moving and stationary contacts of the motor relay.

[0008] The push card and the transmission component are provided with a drive shaft protruding from one of them, and a mounting hole for the drive shaft to be inserted into the other. The drive shaft and the mounting hole are engaged in abutment in the first direction and in clearance engagement in the second direction, so that when the push card moves in the first direction, it can also avoid the transmission component in the second direction. The first direction and the second direction are perpendicular and the plane in which they are located is parallel to the rotation surface of the transmission component.

[0009] In one embodiment, the mounting hole is a waist hole, and the mounting hole includes two abutting walls and two clearance walls. The two abutting walls are arranged opposite to each other in the width direction of the mounting hole and abut against the drive shaft, and the two clearance walls are arranged opposite to each other in the length direction of the mounting hole and clearance fit with the drive shaft.

[0010] In one embodiment, the two avoidance walls may have the same or different shapes.

[0011] In one embodiment, one of the clearance walls has a first opening, the diameter of which is smaller than the diameter of the drive shaft.

[0012] In one embodiment, the mounting hole is provided on the push card, and the length direction of the mounting hole is the second direction.

[0013] In one embodiment, the transmission element has a fixed shaft for its own rotation;

[0014] The mounting hole is provided on the transmission component, and the length direction of the mounting hole is the direction of the line connecting the central axis of the fixed rotating shaft and the central axis of the drive shaft.

[0015] In one embodiment, the push card has a first surface and a second surface opposite each other in a third direction, and at least one of the first surface and the second surface is provided with a limiting protrusion, which abuts against the inner wall of the housing of the motor relay to limit the displacement of the push card in the third direction; wherein the third direction is perpendicular to the first direction and the second direction.

[0016] A motor relay includes a housing, a switching mechanism, and a transmission mechanism as described in any one of the above.

[0017] Both the switching mechanism and the transmission mechanism are housed in the housing. The switching mechanism includes a moving spring assembly and a stationary spring assembly. The moving spring assembly is connected to the push card of the transmission mechanism and has a moving contact. The stationary spring assembly has a stationary contact that cooperates with the moving contact.

[0018] In one embodiment, the motor relay further includes a movable spring lead-out terminal disposed within the housing, the movable spring lead-out terminal having a second opening for the push clip to pass through in the first direction;

[0019] The moving spring assembly includes a moving spring sheet and a compression spring. The moving spring sheet has the moving contact and is connected to the moving spring lead-out terminal and the push card. The compression spring is fixed to the side of the moving spring sheet facing the moving spring lead-out terminal and extends toward the push card to abut against the push card.

[0020] In one embodiment, the compression spring includes a mounting plate and two elastic arms connected to the mounting plate. The mounting plate is connected to the movable spring plate, and the two elastic arms are spaced apart from each other on both sides of the push card.

[0021] The pusher has a support protrusion for supporting the elastic arm, and the elastic arm has an arcuate portion away from the support protrusion.

[0022] The aforementioned transmission mechanism and motor relay have been improved by modifying the fit between the mounting hole of the push card and the drive shaft of the transmission component. Specifically, the fit between the drive shaft and the mounting hole in the first direction is set to an abutment fit, allowing the transmission component to push the push card in the first direction during rotation, thereby opening or closing the moving and stationary contacts. The fit between the drive shaft and the mounting hole in the second direction is set to a clearance fit, giving the push card a certain degree of freedom in the second direction when moving in the first direction. This degree of freedom can be used to absorb or buffer axial offset or minor misalignment caused by gear meshing, avoiding problems such as jamming, shaking, or slow response of the push card during movement. This achieves drag reduction and efficiency enhancement during push-pull movement, thereby improving the reliability and operational stability of the relay. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the transmission mechanism and switch mechanism provided in Embodiment 1 of this application when the moving and stationary contacts are closed.

[0024] Figure 2 This is a schematic diagram of the transmission mechanism and switching mechanism provided in Embodiment 1 of this application when the moving and stationary contacts are disconnected.

[0025] Figure 3 This is a schematic diagram of the structure of the drive shaft and mounting hole provided in Embodiment 1 of this application when the moving and stationary contacts are closed.

[0026] Figure 4 This is a schematic diagram of the structure of the drive shaft and mounting hole provided in Embodiment 1 of this application when the moving and stationary contacts are disconnected.

[0027] Figure 5 This is a schematic diagram of the structure of a push card provided in Embodiment 1 of this application.

[0028] Figure 6 This is a schematic diagram of another push card provided in Embodiment 1 of this application.

[0029] Figure 7 This is a schematic diagram of the transmission mechanism and switch mechanism provided in Embodiment 2 of this application when the moving and stationary contacts are closed.

[0030] Figure 8 This is a schematic diagram of the transmission mechanism and switching mechanism provided in Embodiment 2 of this application when the moving and stationary contacts are disconnected.

[0031] Figure 9 This is a schematic diagram of the structure of the drive shaft and mounting hole provided in Embodiment 2 of this application when the moving and stationary contacts are closed.

[0032] Figure 10 This is a schematic diagram of the structure of the drive shaft and mounting hole when the moving and stationary contacts are disconnected, as provided in Embodiment 2 of this application.

[0033] Figure 11 This is a schematic diagram of the compression spring of the motor relay provided in Embodiment 3 of this application, viewed from a first angle.

[0034] Figure 12 This is a schematic diagram of the compression spring of the motor relay provided in Embodiment 3 of this application, viewed from a second angle.

[0035] The labels in the attached diagram are as follows:

[0036] 10. Relay; 100. Transmission mechanism; 110. Pushing clip; 111. First surface; 112. Limiting protrusion; 113. Supporting protrusion; 120. Transmission component; 121. Fixed rotating shaft; 130. Drive shaft; 140. Mounting hole; 141. Abutment wall; 142. Clearance wall; 1421. First opening; 150. Drive gear set; 200. Moving spring assembly; 210. Moving contact; 220. Moving spring leaf; 230. Compression spring; 231. Mounting piece; 232. Elastic arm; 2321. Arc-shaped part; 300. Stationary spring assembly; 310. Stationary contact; 400. Moving spring lead-out terminal; 500. Stationary spring lead-out terminal. Detailed Implementation

[0037] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0038] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0039] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0040] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0041] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0043] Example 1

[0044] This embodiment provides a transmission mechanism for a motor relay. The transmission mechanism is connected between the motor and the moving spring, converting the rotational motion of the motor into linear motion, driving the moving spring to deform elastically, thereby controlling the closing or opening of the moving and stationary contacts.

[0045] like Figures 1 to 2As shown, the transmission mechanism 100 includes a pusher 110 and a transmission member 120; the pusher 110 is connected to a movable spring 220; the transmission member 120 is movably connected to the pusher 110, and the transmission member 120 can rotate to drive the pusher 110 to move along a first direction, thereby realizing the opening or closing of the moving and stationary contacts of the motor relay 10. When the transmission member 120 moves along... Figure 1 When rotated clockwise as shown, the pusher 110 is pushed in the first direction toward the stationary spring lead-out terminal 500 on which the stationary contact 310 is mounted. The moving spring 220 connected to the pusher 110 also deforms accordingly, causing the moving contact 210 on the moving spring 220 to move closer and closer to the stationary contact 310, until the moving contact 210 presses against the stationary contact 310, thereby closing the moving and stationary contacts of the motor relay 10. When the transmission member 120 moves along... Figure 2 When rotated counterclockwise as shown, the push card 110 can be pushed away from the stationary spring lead-out terminal 500 in the first direction, so that the moving contact 210 on the moving spring 220 moves away from the stationary contact 310, thereby realizing the disconnection of the moving and stationary contacts of the motor relay 10.

[0046] Among them, such as Figure 3 and Figure 4 As shown, the transmission component 120 is provided with a drive shaft 130, and the push card 110 is provided with a mounting hole 140 for the drive shaft 130 to be inserted. The drive shaft 130 and the mounting hole 140 are in abutting fit in the first direction and in a clearance fit in the second direction, so that when the push card 110 moves in the first direction, it can also avoid the transmission component 120 in the second direction; wherein, the first direction and the second direction are perpendicular and the plane in which they are located is parallel to the rotation surface of the transmission component 120.

[0047] The aforementioned transmission component 120 is typically configured as follows: Figure 1 and Figure 2 The sector gear shown has an input end and an output end that are radially opposite each other and an intermediate portion located between the input end and the output end; the input end has meshing teeth that mesh with the drive gear set 150 driven by the motor output shaft; the output end is movably connected to the push card 110; the intermediate portion is connected to the housing of the motor relay 10 via a fixed rotating shaft 121, so that the transmission member 120 can rotate around the fixed rotating shaft 121.

[0048] However, due to the inevitable transmission errors such as backlash and tooth profile error during gear meshing, the output end of the transmission component 120 generates force fluctuations and position deviations in the second direction. This causes the transmission component 120 to interfere with the movement of the push card 110 in the second direction, making the push card 110 prone to problems such as jamming, shaking, or slow response during movement, thus affecting the stable operation of the product.

[0049] In response, this embodiment improves the fit between the mounting hole 140 of the push card 110 and the drive shaft 130 of the transmission component 120. Specifically, the fit between the drive shaft 130 and the mounting hole 140 in the first direction is set to an abutment fit, so that the transmission component 120 can push the push card 110 to move in the first direction during rotation, thereby realizing the opening or closing of the moving and stationary contacts. The fit between the drive shaft 130 and the mounting hole 140 in the second direction is set to a clearance fit, so that the push card 110 has a certain degree of freedom in the second direction when moving in the first direction. This degree of freedom can be used to absorb or buffer the axial offset or slight misalignment caused by gear meshing, which can avoid problems such as jamming, shaking or slow response of the push card 110 during movement, thereby reducing resistance and increasing efficiency in the push-pull movement process, and thus improving the reliability and working stability of the relay 10.

[0050] The transmission mechanism 100 provided in this embodiment also enables the overall structure to maintain good fit within a confined space and adapt to different torque fluctuations during gear rotation; it can also be modularly replaced with different types of gear components.

[0051] like Figure 5 As shown, in this embodiment, the mounting hole 140 is a waist-shaped hole, comprising two abutment walls 141 and two clearance walls 142. The two abutment walls 141 are arranged opposite each other in the width direction of the mounting hole 140 and abut against the drive shaft 130. The two clearance walls 142 are arranged opposite each other in the length direction of the mounting hole 140 and have a clearance fit with the drive shaft 130. The length direction of the mounting hole 140 is a second direction, and the width direction is a first direction. This arrangement of the mounting hole 140 simplifies its structure while enabling the transmission member 120 to effectively push the push card 110 in the first direction and the push card 110 to effectively avoid the transmission member 120 in the second direction.

[0052] The two clearance walls 142 may have the same shape, for example... Figure 5 The wall shown can be either a circular arc or a straight line. This reduces the machining difficulty of the mounting hole 140. Of course, the two clearance walls 142 can also have different shapes; for example, one clearance wall 142 can be a circular arc, and the other clearance wall 142 can be a straight line.

[0053] In some other implementations, such as Figure 6 As shown, one of the clearance walls 142 has a first opening 1421, the diameter of which is smaller than the diameter of the drive shaft 130. The first opening 1421 reduces the weight of the push card 110, making the relay 10 lighter. The first opening 1421 can be positioned facing or away from the drive gear set 150.

[0054] See also Figure 5 and Figure 6 In this embodiment, the push card 110 has a first surface 111 and a second surface opposite each other in a third direction. At least one of the first surface 111 and the second surface is provided with a limiting protrusion 112. The limiting protrusion 112 abuts against the inner wall of the housing of the motor relay 10 to limit the displacement of the push card 110 in a third direction. The third direction is perpendicular to the first direction and the second direction. The limiting protrusion 112 can limit the push card 110 in the third direction, preventing the push card 110 from shaking in the third direction, ensuring the operational stability of the push card 110 in the first direction, and enabling the moving and stationary contacts of the motor relay 10 to be effectively opened or closed.

[0055] Both the first surface 111 and the second surface of the push card 110 may be provided with limiting protrusions 112, or the first surface 111 or the second surface of the push card 110 may be provided with limiting protrusions 112. The specific position of the limiting protrusions 112 on the first surface 111 or the second surface can be set according to the requirements, for example, close to the abutment wall 141 or the avoidance wall 142, or other positions. The number of limiting protrusions 112 on the first surface 111 or the second surface can also be set according to the requirements, for example, one, two or more.

[0056] Example 2

[0057] This embodiment provides a transmission mechanism 100 for a motor relay 10, such as... Figures 7 to 10 As shown, unlike the transmission mechanism 100 provided in Embodiment 1, the push card 110 in this embodiment has a protruding drive shaft 130, and the transmission component 120 has a mounting hole 140 for inserting the drive shaft 130. The length direction of the mounting hole 140 is the direction of the line connecting the central axis of the fixed rotating shaft and the central axis of the drive shaft 130.

[0058] This embodiment improves the structure of the mounting hole 140, allowing for adjustments to the fit between the mounting hole 140 of the push card 110 and the drive shaft 130 of the transmission component 120. In the first direction, the drive shaft 130 abuts against the mounting hole 140, enabling the transmission component 120 to push the push card 110 to move in the first direction during rotation, thereby achieving the opening or closing of the moving and stationary contacts. In the second direction, the drive shaft 130 is clearance-fitted with the mounting hole 140, giving the push card 110 a certain degree of freedom in the second direction when moving in the first direction. This degree of freedom can be used to absorb or buffer axial offset or minor misalignment caused by gear meshing, avoiding problems such as jamming, shaking, or slow response of the push card 110 during movement. This achieves drag reduction and efficiency enhancement during push-pull movement, thereby improving the reliability and operational stability of the relay 10.

[0059] The transmission mechanism 100 provided in this embodiment also enables the overall structure to maintain good fit within a confined space and adapt to different torque fluctuations during gear rotation; it can also be modularly replaced with different types of gear components.

[0060] Example 3

[0061] This embodiment provides a motor relay 10, which includes a housing, a switching mechanism, and a transmission mechanism 100 as described in Embodiment 1. Both the switching mechanism and the transmission mechanism 100 are disposed in the housing. The switching mechanism includes a moving spring assembly 200 and a stationary spring assembly 300. The moving spring assembly 200 is connected to the push card 110 of the transmission mechanism 100 and has a moving contact 210. The stationary spring assembly 300 has a stationary contact 310 that cooperates with the moving contact 210.

[0062] Unlike electromagnetic relays and magnetic latching relays, motor relays use a miniature stepper motor as the drive mechanism and achieve the closing and opening of moving and stationary contacts through a drive gear assembly and transmission component 120, rather than relying on electromagnetic coils.

[0063] The motor relay 10 provided in this embodiment improves the cooperation between the mounting hole 140 of the push card 110 and the drive shaft 130 of the transmission member 120. Specifically, the cooperation between the drive shaft 130 and the mounting hole 140 in the first direction is set to an abutment cooperation, so that the transmission member 120 can push the push card 110 to move in the first direction during rotation, thereby realizing the opening or closing of the moving and stationary contacts. The cooperation between the drive shaft 130 and the mounting hole 140 in the second direction is set to a clearance cooperation, so that the push card 110 has a certain degree of freedom in the second direction when moving in the first direction. This degree of freedom can be used to absorb or buffer the axial offset or slight misalignment caused by gear meshing, which can avoid problems such as jamming, shaking or slow response of the push card 110 during movement, thereby reducing resistance and increasing efficiency in the push-pull movement process, and thus improving the reliability and working stability of the relay 10.

[0064] like Figure 1 , Figure 2As shown, the motor relay 10 also includes a movable spring lead-out terminal 400 disposed within the housing. The movable spring lead-out terminal 400 has a second opening for the push card 110 to pass through in a first direction. The movable spring assembly 200 includes a movable spring plate 220 and a compression spring 230. The movable spring plate 220 has a movable contact 210 and is connected to the movable spring lead-out terminal 400 and the push card 110. The compression spring 230 is fixed to the side of the movable spring plate 220 facing the movable spring lead-out terminal 400 and extends toward the push card 110 to abut against the push card 110. The movable spring plate 220 of the movable spring assembly 200 mainly serves to support the movable contact 210 and perform mechanical movement, while the compression spring 230 mainly provides and maintains the necessary contact pressure when the movable contact 210 is closed. Through the dual cooperation of the movable spring plate 220 and the compression spring 230, the reliability and operational stability of the relay 10 can be guaranteed.

[0065] like Figure 11 and Figure 12 As shown, the compression spring 230 may include a mounting plate 231 and two elastic arms 232 connected to the mounting plate 231. The mounting plate 231 is connected to the movable spring plate 220, and the two elastic arms 232 are spaced apart on both sides of the push plate 110. The push plate 110 is provided with a support protrusion 113 for supporting the elastic arms 232 (see...). Figure 5 The elastic arm 232 has an arcuate portion 2321 that is away from the supporting protrusion 113. By providing an arcuate portion 2321 in the part of the elastic arm 232 that is away from the supporting protrusion 113, the stress on the elastic arm 232 can be reduced, and failure of the elastic arm 232 can be avoided.

[0066] The arc-shaped portion 2321 may be a curved structure protruding towards the moving spring lead-out terminal 400, or a curved structure protruding away from the moving spring lead-out terminal 400.

[0067] like Figure 1 , Figure 2 As shown, the motor relay 10 also includes a stationary spring lead-out terminal 500, which is located inside the housing and is used to install the stationary contact 310.

[0068] Example 4

[0069] This embodiment provides a motor relay 10. Unlike the motor relay 10 in embodiment 3, the motor relay 10 in this embodiment has a drive shaft 130 protruding from the push card 110. The transmission component 120 has a mounting hole 140 for inserting the drive shaft 130, and the length direction of the mounting hole 140 is the line direction connecting the central axis of the fixed rotating shaft and the central axis of the drive shaft 130.

[0070] The motor relay 10 provided in this embodiment improves the cooperation between the mounting hole 140 of the push card 110 and the drive shaft 130 of the transmission member 120. Specifically, the cooperation between the drive shaft 130 and the mounting hole 140 in the first direction is set to an abutment cooperation, so that the transmission member 120 can push the push card 110 to move in the first direction during rotation, thereby realizing the opening or closing of the moving and stationary contacts. The cooperation between the drive shaft 130 and the mounting hole 140 in the second direction is set to a clearance cooperation, so that the push card 110 has a certain degree of freedom in the second direction when moving in the first direction. This degree of freedom can be used to absorb or buffer the axial offset or slight misalignment caused by gear meshing, which can avoid problems such as jamming, shaking or slow response of the push card 110 during movement, thereby reducing resistance and increasing efficiency in the push-pull movement process, and thus improving the reliability and working stability of the relay 10.

[0071] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0072] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A drive mechanism for a motor relay, characterized by, include: Push card; as well as A transmission component is movably connected to the push card. The transmission component can rotate to drive the push card to move in a first direction, thereby realizing the opening or closing of the moving and stationary contacts of the motor relay. The push card and the transmission component are provided with a drive shaft protruding from one of them, and a mounting hole for the drive shaft to be inserted into the other. The drive shaft and the mounting hole are engaged in abutment in a first direction and in clearance engagement in a second direction, so that when the push card moves in the first direction, it can also avoid the transmission component in the second direction. The first direction and the second direction are perpendicular and the plane in which they are located is parallel to the rotation surface of the transmission component.

2. The transmission mechanism according to claim 1, characterized in that The mounting hole is a waist hole, which includes two abutting walls and two clearance walls. The two abutting walls are arranged opposite each other in the width direction of the mounting hole and abut against the drive shaft. The two clearance walls are arranged opposite each other in the length direction of the mounting hole and clearance fit with the drive shaft.

3. The transmission mechanism of claim 2, wherein The two avoidance walls may have the same or different shapes.

4. The transmission mechanism of claim 2, wherein One of the clearance walls has a first opening, the diameter of which is smaller than the diameter of the drive shaft.

5. A transmission mechanism according to any one of claims 2 to 4, wherein The mounting hole is provided on the push card, and the length direction of the mounting hole is the second direction.

6. A transmission mechanism according to any one of claims 2 to 4, wherein The transmission component has a fixed shaft for its own rotation; The mounting hole is provided on the transmission component, and the length direction of the mounting hole is the direction of the line connecting the central axis of the fixed rotating shaft and the central axis of the drive shaft.

7. The transmission of claim 1, wherein The push card has a first surface and a second surface opposite each other in a third direction. At least one of the first surface and the second surface is provided with a limiting protrusion. The limiting protrusion abuts against the inner wall of the housing of the motor relay to limit the displacement of the push card in the third direction. The third direction is perpendicular to the first direction and the second direction.

8. An electric machine relay, characterized by Includes a housing, a switching mechanism, and a transmission mechanism as described in any one of claims 1 to 7; Both the switching mechanism and the transmission mechanism are housed in the housing. The switching mechanism includes a moving spring assembly and a stationary spring assembly. The moving spring assembly is connected to the push card of the transmission mechanism and has a moving contact. The stationary spring assembly has a stationary contact that cooperates with the moving contact.

9. The motor relay of claim 8, wherein, The motor relay further includes a movable spring lead-out terminal disposed within the housing, the movable spring lead-out terminal having a second opening for the push clip to pass through in the first direction; The moving spring assembly includes a moving spring sheet and a compression spring. The moving spring sheet has the moving contact and is connected to the moving spring lead-out terminal and the push card. The compression spring is fixed to the side of the moving spring sheet facing the moving spring lead-out terminal and extends toward the push card to abut against the push card.

10. The motor relay of claim 9, wherein, The compression spring includes a mounting plate and two elastic arms connected to the mounting plate. The mounting plate is connected to the movable spring plate, and the two elastic arms are spaced apart from each other on both sides of the push card. The pusher has a support protrusion for supporting the elastic arm, and the elastic arm has an arcuate portion away from the support protrusion.

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