Clamp spring, transmission mechanism and vehicle
By designing the spring structure of the inner and outer hoods, the problem of the spring being easily thrown away when rotating at high speed is solved, ensuring the limit function of the bearing, and improving the stability and safety of the machinery.
Patent Information
- Application Number
- CN202421760571.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-07-23
AI Technical Summary
The existing springs are easily swung outward when rotating at high speed and leave the spring installation groove, resulting in loss of the limiting function for connecting parts such as bearings.
A spring structure including an inner spring and a outer sleeve is designed. The inner spring is mounted on the rotating shaft and the outer sleeve is restricted from its expansion during high-speed rotation, ensuring that the spring is always in the installation groove.
It effectively avoids the spring from leaving the spring installation groove when rotating at high speed, ensures the limit function of the bearing, and improves the stability and safety of the machinery.
Smart Images
Figure CN222880057U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicles, in particular to a clip spring, a transmission mechanism and a vehicle. Background Art
[0002] Circlips, also known as retaining rings or snap rings, are fasteners installed in the circlip mounting grooves of machines and equipment to prevent the axial movement of connectors on shafts or holes, which can improve the stability and safety of the machinery. They are widely used in various mechanical equipment.
[0003] Circlips are also widely used in the transmission mechanism of vehicles. For example, they are used for bearings on limited rotating shafts. The bearing is sleeved on the rotating shaft as a connecting piece and abuts against the shaft shoulder on its first side. The circlip is clamped in the circlip installation groove on the rotating shaft and abuts against the second side of the bearing, thereby limiting the bearing between the shaft shoulder and the circlip.
[0004] With the widespread application of high-speed motors, the limit speed requirements for the retaining spring are further increased. When the speed of the shaft is too fast, the retaining spring is easily thrown off and expanded out of the retaining spring installation groove under the action of centrifugal force, resulting in the loss of the limiting function of the bearing and other connecting parts. Utility Model Content
[0005] In view of this, the utility model provides a retaining spring, a transmission mechanism and a vehicle to solve the problem that the retaining spring is easily thrown outward and leaves the retaining spring installation groove when the retaining spring rotates at a high speed.
[0006] In a first aspect, the utility model provides a retaining spring suitable for sleeved on a rotating shaft provided with a connecting member, the retaining spring comprising:
[0007] An inner retaining ring, adapted to be mounted in a retaining ring mounting groove on the rotating shaft and abutting against one side of the connecting member;
[0008] The outer clamping sleeve is suitable for being sleeved on the periphery of the inner clamping spring through a fixed structure and being located on the outward expansion path of the inner clamping spring.
[0009] Beneficial effect: The first side of the bearing abuts against the shoulder on the rotating shaft, and the retaining spring is mounted in the retaining spring installation groove on the rotating shaft and abuts against the second side of the bearing, thereby limiting the bearing between the retaining spring and the shoulder, and the bearing cannot move axially along the rotating shaft. The outer retaining sleeve is arranged on the periphery of the inner retaining spring and is located on the outward expansion path of the inner retaining spring. When the rotating shaft rotates at a high speed, the inner retaining spring expands outward under the action of centrifugal force. After the inner retaining spring expands outward to a certain extent, the outer peripheral surface of the inner retaining spring abuts against the inner peripheral surface of the outer retaining sleeve, so that the outer retaining sleeve limits the inner retaining spring from continuing to expand outward, thereby preventing the inner retaining spring from expanding too much and leaving the retaining spring installation groove and losing the limiting function of the bearing.
[0010] In an optional embodiment, the outer sleeve is connected with a limiting portion suitable for abutting against the side of the inner retaining spring away from the connecting member, the outer peripheral surface of the inner retaining spring is provided with a first conical surface, and the inner peripheral surface of the outer sleeve is provided with a second conical surface, and the first conical surface and the second conical surface are inclined outward in a direction away from the connecting member.
[0011] Beneficial effect: When the shaft rotates at high speed, the inner retaining spring expands outward under the action of centrifugal force. After the inner retaining spring expands outward to a certain extent, the first conical surface abuts against the second conical surface. As a result, the outer sleeve limits the inner retaining spring from continuing to expand outward, thereby preventing the inner retaining spring from expanding too much and leaving the retaining spring installation groove and losing its limiting function on the bearing. When the inner retaining spring expands outward, the inner retaining spring generates an outward thrust perpendicular to the second conical surface on the outer sleeve, and the thrust is decomposed into a radial force radially outward along the outer sleeve and an axial force axially along the outer sleeve and pointing to the connector. Ensure that the outer sleeve is stable on the periphery of the inner retaining spring, and prevent the outer sleeve from moving along the axial direction of the shaft and leaving the periphery of the inner retaining spring, causing the outer sleeve to lose its expansion restriction on the inner retaining spring.
[0012] In an optional embodiment, the shortest distance between the first conical surface and the second conical surface in the radial direction of the rotating shaft is smaller than the depth of the retaining ring installation groove.
[0013] Beneficial effect: when the inner retaining spring expands outward and the first conical surface abuts against the second conical surface, the inner side of the inner retaining spring is still located in the retaining spring installation groove, thereby ensuring the limiting effect of the inner retaining spring on the connecting piece.
[0014] In an optional implementation, the first tapered surface and the second tapered surface are parallel.
[0015] Beneficial effect: Since the first conical surface and the second conical surface are parallel, the contact area is larger when the first conical surface and the second conical surface are in contact, that is, the action surface between the first conical surface and the second conical surface is larger. This further ensures that the outer ferrule is stable on the periphery of the inner retaining spring, and prevents the outer ferrule from losing the expansion restriction on the inner retaining spring.
[0016] In an optional embodiment, the minimum diameter of the second tapered surface is greater than the maximum diameter of the first tapered surface.
[0017] Beneficial effect: Since the minimum diameter of the second conical surface is greater than the maximum diameter of the first conical surface, the side of the outer ferrule close to the connecting piece can be inserted into the side of the inner retaining ring away from the connecting piece, thereby ensuring that the outer ferrule is sleeved to the periphery of the inner retaining ring.
[0018] In an optional embodiment, the angle between the generatrix of the first conical surface and the axis of the inner retaining spring is 3 degrees to 5 degrees; the angle between the generatrix of the second conical surface and the axis of the outer ferrule is 3 degrees to 5 degrees.
[0019] Beneficial effect: Since the inclination angles of the first conical surface and the second conical surface are small, the range of motion of the inner spring is small, which reduces the expandable deformation of the inner retaining spring and avoids large deformation of the inner retaining spring that affects its limiting function.
[0020] In an optional embodiment, the fixing structure includes:
[0021] The fixing sleeve is suitable for being sleeved on the rotating shaft, the outer sleeve is connected to the end surface of the fixing sleeve, and the limiting portion is arranged on the fixing sleeve.
[0022] Beneficial effect: the outer clamping sleeve is arranged on the periphery of the inner clamping spring by using a fixing sleeve, and the structure is simpler.
[0023] In an optional embodiment, the inner retaining spring and the outer retaining sleeve are both integrally formed structures.
[0024] Beneficial effect: It can be installed and used once after processing and manufacturing, without the need for multiple assembly, which increases the overall consistency and connection strength.
[0025] In a second aspect, the utility model further provides a transmission mechanism, comprising a rotating shaft provided with a retaining spring installation groove, a connecting piece sleeved on the rotating shaft and any of the retaining springs described above.
[0026] Beneficial effect: The effect brought by the transmission mechanism is consistent with the effect produced by the retaining spring, so it will not be repeated.
[0027] In a third aspect, the utility model further provides a vehicle, comprising the transmission mechanism described above.
[0028] Beneficial effects: The effects brought about by the vehicle are consistent with those produced by the transmission mechanism or the retaining spring, so they will not be elaborated on. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0030] Figure 1 A cross-sectional view of a retaining spring installed on a rotating shaft according to an embodiment of the utility model;
[0031] Figure 2 A cross-sectional view of a retaining spring according to an embodiment of the utility model;
[0032] Figure 3This is a schematic diagram of an inner retaining spring of a retaining spring according to an embodiment of the utility model when the inner retaining spring and the outer retaining sleeve are in contact with each other;
[0033] Figure 4 for Figure 3 A partial enlarged view of point A in the middle.
[0034] Description of reference numerals:
[0035] 1. Rotating shaft; 2. Connecting piece; 3. Internal retaining ring; 4. External retaining sleeve; 5. First conical surface; 6. Second conical surface; 7. Fixed sleeve; 8. Retaining ring mounting groove. DETAILED DESCRIPTION
[0036] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.
[0037] Combine the following Figures 1 to 4 , describing an embodiment of the utility model.
[0038] According to an embodiment of the utility model, on the one hand, a retaining spring is provided, comprising an inner retaining spring 3 and an outer retaining sleeve 4. When used to limit the bearing on the rotating shaft 1, the bearing is sleeved on the rotating shaft 1 as a connecting member 2 until the first side of the bearing abuts against the shoulder on the rotating shaft 1. A retaining spring installation groove 8 is provided on the rotating shaft 1, and when the bearing abuts against the shoulder on the rotating shaft 1, the retaining spring installation groove 8 is just located on the outside of the second side of the bearing. At this time, the inner retaining spring 3 is expanded and sleeved on the rotating shaft 1, and then the retaining spring is inserted axially along the rotating shaft 1 until the retaining spring is located at the periphery of the retaining spring installation groove 8, and the expansion force on the retaining spring is cancelled, so that the retaining spring rebounds and is clamped in the retaining spring installation groove 8 on the rotating shaft 1. At this time, the side wall of the retaining spring abuts against the second side of the bearing, thereby limiting the bearing between the retaining spring and the shoulder, and the bearing cannot move axially along the rotating shaft 1.
[0039] Then, the outer sleeve 4 is sleeved on the periphery of the inner retaining spring 3 and is located on the outward expansion path of the inner retaining spring, that is, the inner retaining spring 3 and the outer sleeve 4 are sequentially arranged along the radial direction of the rotating shaft 1, and the inner circumference of the outer sleeve 4 is located on the side of the outer circumference of the inner retaining spring 3 away from the axis of the rotating shaft along the radial direction of the rotating shaft. When the rotating shaft 1 rotates at a high speed, the inner retaining spring 3 is thrown away and expanded outward under the action of centrifugal force. After the inner retaining spring 3 expands outward to a certain extent, that is, after the inner retaining spring 3 expands outward along the radial direction of the rotating shaft for a certain distance, the outer circumference of the inner retaining spring 3 abuts against the inner circumference of the outer sleeve 4, so that the outer sleeve 4 limits the inner retaining spring 3 from continuing to expand outward, thereby preventing the inner retaining spring 3 from expanding too much and leaving the retaining spring installation groove 8 and losing the limiting function of the bearing.
[0040] It is worth noting that when the shaft 1 is stationary, the shortest distance between the outer circumference of the inner retaining spring 3 and the inner circumference of the outer ferrule 4 in the radial direction of the shaft 1 should be less than the depth of the retaining spring installation groove 8. This ensures that when the inner retaining spring 3 expands outward and the outer circumference abuts against the inner circumference of the outer ferrule 4, the inner side of the inner retaining spring 3 is still clamped in the retaining spring installation groove 8, preventing the inner retaining spring 3 from leaving the retaining spring installation groove 8.
[0041] In some embodiments, a limiting portion is connected to the outer ferrule 4. When the outer ferrule 4 is sleeved on the periphery of the inner retaining spring 3, the limiting portion abuts against the side of the inner retaining spring 3 away from the connecting member 2, so that the outer ferrule 4 cannot continue to move axially along the rotating shaft 1 toward the connecting member 2. A first conical surface 5 is provided on the outer circumferential surface of the inner retaining spring 3. For the first conical surface 5, in the direction away from the connecting member 2, the outer circumferential surface of the inner retaining spring 3 is inclined outward to form the first conical surface 5. A second conical surface 6 is provided on the inner circumferential surface of the outer ferrule 4. For the second conical surface 6, in the direction away from the connecting member 2, the inner circumferential surface of the outer ferrule 4 is inclined outward to form the second conical surface 6. Outward refers to the direction away from the axis of the rotating shaft 1.
[0042] In this way, after the outer sleeve 4 is sleeved on the periphery of the inner retaining spring 3, the second conical surface 6 is located on the periphery of the first conical surface 5. When the shaft 1 rotates at high speed, the inner retaining spring 3 expands outward under the action of centrifugal force. After the inner retaining spring 3 expands outward to a certain extent, the first conical surface 5 abuts against the second conical surface 6. Thereby, the outer sleeve 4 limits the inner retaining spring 3 from continuing to expand outward, thereby preventing the inner retaining spring 3 from expanding too much and leaving the retaining spring mounting groove 8 and losing the limiting function of the bearing. Since the first conical surface 5 and the second conical surface 6 are both inclined outward in the direction away from the connecting member 2. When the inner retaining spring 3 expands outward, the inner retaining spring 3 generates an outward thrust Fn perpendicular to the second conical surface 6 on the outer sleeve 4, and the thrust Fn is decomposed into a radial force Fr radially outward along the outer sleeve 4 and an axial force Fa axially along the outer sleeve 4 and pointing to the connecting member 2. The axial force Fa causes the outer sleeve 4 to be subjected to a thrust Fn directed toward the connector 2, and there is no other axial force Fa acting on the outer sleeve 4. At this time, the limiter is pressed against the inner retaining spring 3 in the direction close to the connector 2, ensuring that the outer sleeve 4 is stable on the periphery of the inner retaining spring 3, and preventing the outer sleeve 4 from moving along the axial direction of the shaft 1 and leaving the periphery of the inner retaining spring 3, causing the outer sleeve 4 to lose the expansion restriction on the inner retaining spring 3.
[0043] In a further embodiment, the shortest distance between the first conical surface 5 and the second conical surface 6 in the radial direction of the rotating shaft 1 should be less than the depth of the retaining spring installation groove 8. This ensures that when the inner retaining spring 3 expands outward and the first conical surface 5 abuts against the second conical surface 6, the inner side of the inner retaining spring 3 is still clamped in the retaining spring installation groove 8, preventing the inner retaining spring 3 from leaving the retaining spring installation groove 8. If the shortest distance between the first conical surface 5 and the second conical surface 6 is greater than the depth of the retaining spring installation groove 8, when the inner retaining spring 3 expands outward and the inner side of the inner retaining spring 3 leaves the retaining spring installation groove 8, the first conical surface 5 still cannot abut against the second conical surface 6. When the first conical surface 5 continues to expand and abuts against the second conical surface 6, the inner side of the inner retaining spring 3 has left the retaining spring installation groove 8, and at this time the inner retaining spring 3 can move axially along the rotating shaft 1 and loses the limiting effect on the connecting member 2.
[0044] Therefore, when the shortest distance between the first conical surface 5 and the second conical surface 6 in the radial direction of the rotating shaft 1 is smaller than the depth of the retaining spring mounting groove 8, when the inner retaining spring 3 expands outward and the first conical surface 5 abuts against the second conical surface 6, the inner side of the inner retaining spring 3 is still located in the retaining spring mounting groove 8, thereby ensuring the limiting effect of the inner retaining spring 3 on the connecting member 2.
[0045] In another further embodiment, the first conical surface 5 and the second conical surface 6 are parallel. After the outer sleeve 4 is sleeved on the periphery of the inner retaining spring 3, the second conical surface 6 is located on the periphery of the first conical surface 5. When the shaft 1 rotates at high speed, the inner retaining spring 3 expands outward under the action of centrifugal force. After the inner retaining spring 3 expands outward to a certain extent, the first conical surface 5 abuts against the second conical surface 6. Since the first conical surface 5 and the second conical surface 6 are parallel, the contact area is larger when the first conical surface 5 and the second conical surface 6 are in contact, that is, the action surface between the first conical surface 5 and the second conical surface 6 is larger. This further ensures that the outer sleeve 4 is stable on the periphery of the inner retaining spring 3, preventing the outer sleeve 4 from losing the expansion restriction on the inner retaining spring 3.
[0046] Among them, since the first conical surface 5 and the second conical surface 6 are parallel, the distance between the first conical surface 5 and the second conical surface 6 in the radial direction of the rotating shaft 1 is equal everywhere and is smaller than the depth of the retaining spring mounting groove 8, thereby ensuring that when the inner retaining spring 3 expands outward and the first conical surface 5 abuts against the second conical surface 6, the inner side of the inner retaining spring 3 is still clamped in the retaining spring mounting groove 8, preventing the inner retaining spring 3 from leaving the retaining spring mounting groove 8.
[0047] In yet another further embodiment, the minimum diameter of the second tapered surface 6 is greater than the maximum diameter of the first tapered surface 5. Since both the first tapered surface 5 and the second tapered surface 6 are inclined outward in a direction away from the connecting member 2, the minimum diameter of the second tapered surface 6 is the diameter of the second tapered surface 6 on the side close to the connecting member 2, and the maximum diameter of the first tapered surface 5 is the diameter of the first tapered surface 5 on the side away from the connecting member 2.
[0048] With such arrangement, after the inner retaining ring 3 is clamped in the retaining ring installation groove 8 on the rotating shaft 1, the side with the largest diameter of the first tapered surface 5 is located on the side away from the connecting member 2. Then the outer sleeve 4 is inserted axially along the rotating shaft 1, and at this time, the side with the smallest diameter of the second tapered surface 6 is located on the side close to the connecting member 2. In the radial direction of the rotating shaft, since the minimum diameter of the second tapered surface 6 is greater than the maximum diameter of the first tapered surface 5, the side of the outer sleeve 4 close to the connecting member 2 can be inserted into the side of the inner retaining ring 3 away from the connecting member 2, thereby ensuring that the outer sleeve 4 is sleeved to the periphery of the inner retaining ring 3.
[0049] It is worth noting that the difference between the minimum diameter of the second conical surface 6 and the maximum diameter of the first conical surface 5 should be a smaller value. Under the premise of ensuring that the outer sleeve 4 can be mounted on the outer periphery of the inner retaining spring 3, the range of motion of the inner spring is smaller, thereby reducing the expandable deformation of the inner retaining spring 3 and avoiding large deformation of the inner retaining spring 3 and affecting its limiting function.
[0050] As an optional embodiment, the inclination angle C of the first conical surface 5 is 3 degrees to 5 degrees, that is, the angle between the generatrix of the first conical surface 5 and the axis of the inner retaining spring 3 is any angle between 3 degrees and 5 degrees. The inclination angle B of the second conical surface 6 is 3 degrees to 5 degrees, that is, the angle between the generatrix of the second conical surface 6 and the axis of the inner retaining spring 3 is any angle between 3 degrees and 5 degrees. Since the inclination angle C of the first conical surface 5 and the inclination angle B of the second conical surface 6 are small, the range of motion of the inner spring is small, the expandable deformation of the inner retaining spring 3 is reduced, and the inner retaining spring 3 is prevented from being greatly deformed and affecting its limiting function.
[0051] As an optional embodiment, the fixing structure includes a fixing sleeve 7, and the outer ferrule 4 is fixedly connected to the end face of the fixing sleeve 7 as a whole, and the fixing sleeve 7 and the outer ferrule 4 are coaxially arranged. At this time, the end face of the fixing sleeve 7 close to the outer ferrule 4 is a limiting portion.
[0052] A fitting hole is opened axially on the fixed sleeve 7, and the side of the fixed sleeve 7 where the outer sleeve 4 is located is close to the connecting piece 2 and the fixed sleeve 7 is inserted into the rotating shaft 1 until the side of the inner retaining spring 3 away from the connecting piece 2 abuts against the end face of the fixed sleeve 7 close to the outer sleeve 4. At this time, the outer sleeve 4 is sleeved on the outer periphery of the inner retaining spring 3.
[0053] Since the first conical surface 5 and the second conical surface 6 are both inclined outward in the direction away from the connecting member 2. When the inner retaining spring 3 expands outward, the inner retaining spring 3 generates an outward thrust Fn perpendicular to the second conical surface 6 on the outer retaining sleeve 4, and the thrust Fn is decomposed into a radial force Fr radially outward along the outer retaining sleeve 4 and an axial force Fa axially along the outer retaining sleeve 4 and pointing to the connecting member 2. The axial force Fa causes the outer retaining sleeve 4 to be subjected to the thrust Fn pointing to the connecting member 2, and there is no other axial force Fa acting on the outer retaining sleeve 4. At this time, the axial force Fa acting on the outer retaining sleeve 4 is transmitted to the fixing sleeve 7, so that the end surface of the fixing sleeve 7 close to the outer retaining sleeve 4 is pressed against the inner retaining spring 3 in the direction close to the connecting member 2, ensuring that the outer retaining sleeve 4 is stable on the periphery of the inner retaining spring 3, and preventing the outer retaining sleeve 4 from moving axially along the rotating shaft 1 and leaving the periphery of the inner retaining spring 3, causing the outer retaining sleeve 4 to lose the expansion restriction on the inner retaining spring 3.
[0054] The outer clamping sleeve 4 is arranged on the periphery of the inner clamping spring 3 by using the fixing sleeve 7, and the structure is simpler. The sleeve hole on the fixing sleeve 7 is interference-fitted with the rotating shaft 1.
[0055] It is worth noting that, in the case where the second tapered surface 6 is provided on the inner circumferential surface of the outer ferrule 4 , the second tapered surface 6 is provided on the inner circumferential surface of the outer ferrule 4 .
[0056] In some embodiments, the inner clamping spring 3 and the outer clamping sleeve 4 are both integrally formed structures, which can be installed and used once after processing and manufacturing, without the need for multiple assembly, thereby increasing the overall consistency and connection strength.
[0057] On the other hand, a transmission mechanism is also provided, which includes a rotating shaft 1 for transmitting power and a connecting member 2 sleeved on the rotating shaft 1, wherein any of the above-mentioned clamping springs is sleeved on the rotating shaft 1, a first side of the connecting member 2 abuts against a shaft shoulder of the rotating shaft 1, and the clamping spring abuts against a second side of the connecting member 2, thereby limiting the connecting member 2 between the clamping spring and the shaft shoulder. The effect brought by the transmission mechanism is consistent with the effect brought by the clamping spring, so it will not be repeated.
[0058] On the other hand, a vehicle is provided, including a power machine and an execution component, wherein the power machine can be an engine or a motor, etc. The power machine is connected to the execution component through the transmission mechanism. The effect brought by the vehicle is consistent with the effect brought by the transmission mechanism or the retaining spring, so it will not be repeated.
[0059] The vehicles include cars, engineering vehicles and work vehicles.
[0060] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.
Claims
1. A retaining spring, characterized in that: Suitable for a rotating shaft (1) sleeved with a connecting piece (2), the retaining spring comprises: An inner retaining ring (3) adapted to be mounted in a retaining ring mounting groove (8) on the rotating shaft (1) and to abut against one side of the connecting member (2); The outer clamping sleeve (4) is suitable for being sleeved on the periphery of the inner clamping spring (3) through a fixed structure and being located on the outward expansion path of the inner clamping spring.
2. The retaining spring according to claim 1, characterized in that: The outer sleeve (4) is connected to a limiting portion suitable for abutting against the side of the inner retaining spring (3) away from the connecting member (2), the outer peripheral surface of the inner retaining spring (3) is provided with a first conical surface (5), and the inner peripheral surface of the outer sleeve (4) is provided with a second conical surface (6), and the first conical surface (5) and the second conical surface (6) are inclined outward in a direction away from the connecting member (2).
3. The retaining spring according to claim 2, characterized in that: The shortest distance between the first conical surface (5) and the second conical surface (6) in the radial direction of the rotating shaft (1) is smaller than the depth of the retaining ring installation groove (8).
4. The retaining spring according to claim 2, characterized in that: The first tapered surface (5) and the second tapered surface (6) are parallel.
5. The retaining spring according to claim 2, characterized in that: The minimum diameter of the second tapered surface (6) is greater than the maximum diameter of the first tapered surface (5).
6. The retaining spring according to claim 2, characterized in that: The angle between the generatrix of the first conical surface (5) and the axis of the inner retaining spring (3) is 3 degrees to 5 degrees; the angle between the generatrix of the second conical surface (6) and the axis of the outer retaining sleeve (4) is 3 degrees to 5 degrees.
7. The retaining spring according to claim 2, characterized in that: The fixed structure comprises: The fixing sleeve (7) is suitable for being sleeved on the rotating shaft (1), the outer sleeve (4) is connected to the end surface of the fixing sleeve (7), and the limiting portion is arranged on the fixing sleeve (7).
8. The retaining spring according to claim 1, characterized in that: The inner retaining spring (3) and the outer retaining sleeve (4) are both integrally formed structures.
9. A transmission mechanism, characterized in that: The invention comprises a rotating shaft (1) provided with a retaining spring installation groove (8), a connecting piece (2) sleeved on the rotating shaft (1), and the retaining spring according to any one of claims 1 to 8.
10. A vehicle, characterized in that: Including the transmission mechanism described in claim 9.