Swing arm node
By adopting the design of angular contact joint bearings and inner spacers in the swing arm nodes, the problems of poor stiffness and insufficient impact resistance under large loads and high addition (deduction) speeds are solved, and higher rigidity and better load-bearing capacity are achieved.
Patent Information
- Application Number
- CN202421951890.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-08-13
AI Technical Summary
Under the conditions of large loads and high addition (deduction) speed, traditional swing arm nodes have disadvantages such as impact resistance, easy indentation, and poor stiffness, resulting in reduced suspension performance or failure.
It adopts swing arm node design including pins, inner spacers, bearing seats, fasteners and angular contact joint bearings. The inner ring of the angular contact joint bearing contacts the spherical surface of the outer ring, and coordinates deformation and displacement through the inner spacer to improve rigidity and impact resistance.
The rigidity, load-bearing capacity and impact resistance of the swing arm node are improved, and large loads can be transferred more effectively, and stable performance is maintained under high adding (decreasing) speed conditions.
Smart Images
Figure CN222819864U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicle accessories, in particular to a swing arm node. Background Art
[0002] The swing arm of the vehicle is located at the position of the suspension and is an important structure connecting the wheel hub and the body. The connection node between the swing arm and the wheel hub and the body will directly affect the stability and reliability of the wheel hub, and then affect the stability of driving. It is one of the core components that determine the performance of the whole vehicle. The swing arm node must not only transmit the wheel hub load under complex working conditions, but also ensure that the swing arm and the wheel hub, and the swing arm and the body have flexible rotational freedom. Traditional swing arm nodes are mainly composed of rolling bearings or rubber sleeves. The rolling bearing swing arm node has a small load-bearing capacity and low impact resistance because the bearing rolling element and the bearing ring are in point contact or line contact. The rubber sleeve swing arm node has poor rigidity and is constrained by the rubber deformation, and the rotation angle is limited. With the development of vehicle electrification, under large loads and high acceleration (deceleration) conditions, traditional swing arm nodes have exposed shortcomings such as poor impact resistance, easy indentation, and poor stiffness, resulting in reduced suspension performance or failure. Utility Model Content
[0003] To this end, in view of the shortcomings of the above-mentioned traditional swing arm nodes, the utility model provides a swing arm node. The swing arm node is a vehicle swing arm node with high rigidity, capable of bearing large loads and high acceleration (deceleration), and can meet the use of new energy vehicles.
[0004] The utility model is implemented by the following scheme:
[0005] The utility model proposes a swing arm node, comprising a pin shaft, an inner spacer sleeve, a bearing seat, a fastener and two angular contact joint bearings, wherein the swing arm node is used to be installed with two swing arm joints, each of the angular contact joint bearings comprises an angular contact joint bearing inner ring and an angular contact joint bearing outer ring, and is characterized in that the two angular contact joint bearing outer rings are mounted on the bearing seat back to back, the two angular contact joint bearing inner rings are arranged back to back on the inner sides of the two swing arm joints, the inner spacer sleeve is arranged between the two angular contact joint bearing inner rings, the two swing arm joints, the two angular contact joint bearing inner rings and the inner spacer sleeve are sleeved on the pin shaft, and are installed as a whole through the fastener, and the angular contact joint bearing inner ring is in spherical contact with the angular contact joint bearing outer ring.
[0006] In one embodiment, the bearing load centers of the angular contact spherical bearing are point A and point B, respectively, and the distance between point A and point B is greater than the installation distance of the two angular contact spherical bearings.
[0007] In one embodiment, a layer of elastomer is provided between the axial end surface of the inner ring of the angular contact spherical bearing and the swing arm joint.
[0008] In one embodiment, the bearing seat is provided with an oil filling hole, the oil filling hole is connected to the inner cavity of the bearing seat, and the angular contact spherical bearing is provided with a lubrication groove.
[0009] In one embodiment, the bearing seat is provided with an oil filling hole, the outer surface of the angular contact joint bearing is provided with an external lubrication groove, the oil filling hole is connected to the external lubrication groove, the outer ring of the angular contact joint bearing is provided with a radial lubrication hole in the radial direction, the inner ball surface of the outer ring of the angular contact joint bearing is provided with a lubrication groove, and the external lubrication groove is connected with the lubrication groove on the inner ball surface through the radial lubrication hole.
[0010] In one embodiment, a spherical cross lubrication groove and a spherical annular lubrication groove are provided on the inner spherical surface of the outer ring of the angular contact spherical joint bearing.
[0011] In one embodiment, there are 8 groups of spherical cross lubrication grooves, which are evenly distributed around the circumference of the central axis of the inner spherical surface of the outer ring of the angular contact joint bearing, and each group of the spherical cross lubrication grooves includes two cross-arranged lubrication grooves, and the crossing angle of the two lubrication grooves is 77°.
[0012] In one embodiment, a spherical axial lubrication groove is provided on the inner spherical surface of the outer ring of the angular contact spherical bearing.
[0013] In one embodiment, there are 12 spherical axial lubrication grooves, which are evenly distributed around the circumference of the central axis of the inner spherical surface of the outer ring of the angular contact spherical bearing.
[0014] In one embodiment, there is a self-lubricating liner between the inner spherical surface of the outer ring of the angular contact spherical bearing and the outer spherical surface of the inner ring of the angular contact spherical bearing.
[0015] The technical solution provided by the utility model has the following technical effects:
[0016] 1. The utility model provides a swing arm node, wherein an inner spacer is provided between the two inner rings of the angular contact joint bearings, which is used to coordinate the deformation and displacement of the two inner rings of the angular contact joint bearings, to avoid the two inner rings of the angular contact joint bearings clamping the outer ring of the angular contact joint bearings at the same time to cause jamming, and to improve the uniformity of wear on the sliding spherical surface. The inner ring of the angular contact joint bearing is in spherical contact with the outer ring of the angular contact joint bearing, and the two outer rings of the angular contact joint bearings are mounted on the bearing seat in reverse, and the two inner rings of the angular contact joint bearings are arranged in reverse on the inner sides of the two swing arm joints, so that the swing arm node has higher rigidity, better load-bearing capacity and impact resistance.
[0017] 2. The bearing load centers are point A and point B. The distance between point A and point B is greater than the bearing installation distance, which further improves the rigidity, load-bearing capacity and impact resistance of the swing arm node.
[0018] 3. A layer of elastomer is provided between the axial end face of the inner ring of the angular contact spherical bearing and the swing arm joint. When the swing arm node is initially installed, the elastomer is in a compressed state. When the spherical surface of the bearing wears, the compression of the elastomer begins to slowly release, automatically compensating for the bearing wear, eliminating the wear gap, and providing axial preload, so that the spherical contact between the inner and outer rings of the bearing remains stable and the performance of the swing arm node remains stable. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a full cross-sectional view of the swing arm node of the first embodiment;
[0020] Figure 2 is a full cross-sectional view of the swing arm node of the second embodiment;
[0021] Figure 3 is a full cross-sectional view of the outer ring of the angular contact spherical plain bearing of the first embodiment and the second embodiment;
[0022] Figure 4 is a partial cross-sectional view of the outer ring of the angular contact spherical plain bearing of the first embodiment and the second embodiment;
[0023] Figure 5 is a full cross-sectional view of another implementation manner of the outer ring of the angular contact spherical plain bearing of the first embodiment and the second embodiment;
[0024] Figure 6 is a partial cross-sectional view of another implementation manner of the outer ring of the angular contact spherical plain bearing of the first embodiment and the second embodiment;
[0025] Figure 7 is a full cross-sectional view of the angular contact spherical plain bearing of the second embodiment;
[0026] Figure 8 It is a full cross-sectional view of the swing arm node of the third embodiment. DETAILED DESCRIPTION
[0027] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.
[0028] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.
[0029] Example 1
[0030] like Figure 1 , 3 -6, this embodiment provides a swing arm node, including a pin 1, an angular contact joint bearing inner ring 8, an angular contact joint bearing outer ring 7, an inner spacer 6, a bearing seat 5, an elastic body 4 and a fastener 2, and the swing arm node is used to be installed with two swing arm joints 3. The angular contact joint bearing inner ring 8 and the angular contact joint bearing outer ring 7 form an angular contact joint bearing. The two angular contact joint bearing outer rings 7 are installed on the bearing seat 5 back to back, and have no relative movement with the bearing seat 5. The fastener 2 can be a locking nut, etc. The two swing arm joints 3 are arranged at intervals, and the two angular contact spherical bearing inner rings 8 are arranged on the inner sides of the two swing arm joints 3. An inner spacer sleeve 6 is arranged between the two angular contact spherical bearing inner rings 8. The two swing arm joints 3, the two angular contact spherical bearing inner rings 8 and the inner spacer sleeve 6 are sleeved on the pin shaft 1 and installed as a whole through the fastener 2. The angular contact spherical bearing inner ring 8 is in spherical contact with the angular contact spherical bearing outer ring 7. During operation, the angular contact spherical bearing inner ring 8 swings with the swing arm through the swing arm joint 3 and rotates around the pin shaft 1, and sliding friction occurs on the spherical surfaces of the bearing pair.
[0031] An inner spacer 6 is installed between the two angular contact spherical bearing inner rings 8 to coordinate the deformation and displacement of the two angular contact spherical bearing inner rings 8, to prevent the two angular contact spherical bearing inner rings 8 from simultaneously clamping the angular contact spherical bearing outer ring 7 and causing jamming, and to improve the wear uniformity of the sliding spherical surface. The two angular contact spherical bearing inner rings 8 are arranged back to back, so that the swing arm node has higher rigidity, better load-bearing capacity and impact resistance. Furthermore, the bearing load centers are point A and point B respectively. The distance between point A and point B is greater than the bearing installation distance, so that the rigidity, load-bearing capacity and impact resistance of the swing arm node are further improved.
[0032] A layer of elastomer 4 is provided between the axial end face of the inner ring 8 of the angular contact spherical bearing and the swing arm joint 3. The elastomer 4 can be assembled as an independent part or processed on the end face of the bearing. It can be made of non-metallic materials such as rubber and plastic, or metal parts such as disc springs and elastic washers. When the swing arm node is initially installed, the elastomer 4 is in a compressed state. When the spherical surface of the bearing is worn, the compression of the elastomer 4 begins to slowly release, automatically compensating for the bearing wear, eliminating the wear gap, and providing axial preload, so that the spherical contact between the inner and outer rings of the bearing remains stable, and the performance of the swing arm node remains stable.
[0033] Figure 1The lubricated angular contact spherical bearing swing arm node is shown in FIG. The lubricated swing arm node requires external oil injection, so there is an oil injection hole 10 on the bearing seat 5, and the oil injection hole 10 is connected to the inner cavity of the bearing seat 5. The angular contact spherical bearing is provided with a lubrication groove, and the lubricating oil or grease is injected into the inner cavity of the bearing seat 5 through the oil injection hole 10, and then flows from the inner cavity to the end of the bearing into the bearing lubrication groove, and is drained to the sliding surface for lubrication.
[0034] like Figure 3-4 As shown, a spherical cross lubrication groove 73 and a spherical annular lubrication groove 74 are provided on the inner spherical surface of the outer ring 7 of the angular contact joint bearing. There are 8 groups of spherical cross lubrication grooves 73, and the 8 groups of spherical cross lubrication grooves 73 are evenly distributed around the circumference of the central axis of the inner spherical surface of the outer ring 7 of the angular contact joint bearing. Each group of spherical cross lubrication grooves 73 includes two cross-arranged lubrication grooves, and the intersection angle of the two lubrication grooves is 77°, so that the drainage of lubricating oil or grease can be better achieved. An outer lubrication groove 71 is provided on the outer surface of the outer ring 7 of the angular contact joint bearing, and a radial lubrication hole 72 is provided in the radial direction of the outer ring 7 of the angular contact joint bearing. The outer lubrication groove 71 is connected to the spherical cross lubrication groove 73 and the spherical annular lubrication groove 74 through the radial lubrication hole 72. In this embodiment, the outer lubrication groove 71 and the radial lubrication hole 72 are not required.
[0035] Alternatively, in another embodiment, Figure 5-6 As shown, a spherical axial lubrication groove 75 is provided on the inner spherical surface of the outer ring 7' of the angular contact spherical bearing. There are 12 spherical axial lubrication grooves 75, which are evenly distributed around the circumference of the central axis of the inner spherical surface of the outer ring 7' of the angular contact spherical bearing. The lubrication oil or grease can also be drained to achieve lubrication of the bearing.
[0036] Example 2
[0037] like Figure 2-7 As shown, in this embodiment, the position of the oil filling hole 10 on the bearing seat 5 and the lubrication groove on the bearing are different from those in the embodiment 1, and the rest is the same as the embodiment 1. Figure 2 As shown, in this embodiment, the oil filling hole 10 on the bearing seat 5 is connected to the outer surface of the outer ring 7 of the angular contact spherical plain bearing.
[0038] like Figure 3-4As shown, an outer lubrication groove 71 is provided on the outer surface of the outer ring 7 of the angular contact joint bearing, and the oil injection hole 10 is connected to the outer lubrication groove 71 on the outer surface of the outer ring 7 of the angular contact joint bearing. A radial lubrication hole 72 is provided in the radial direction of the outer ring 7 of the angular contact joint bearing, and a lubrication groove is provided on the inner spherical surface of the outer ring 7 of the angular contact joint bearing, and the outer lubrication groove 71 is connected with the lubrication groove on the inner spherical surface through the radial lubrication hole 72. Specifically, a spherical cross lubrication groove 73 and a spherical annular lubrication groove 74 are provided on the inner spherical surface of the outer ring 7 of the angular contact joint bearing. Lubricating oil or grease enters the spherical cross lubrication groove 73 and the spherical annular lubrication groove 74 through the oil injection hole 10, the outer lubrication groove 71 and the radial lubrication hole 72, so that the lubricating oil or grease is drained to the sliding surface of the bearing to achieve lubrication of the bearing.
[0039] There are 8 groups of spherical cross lubrication grooves 73, which are evenly distributed around the circumference of the central axis of the inner spherical surface of the angular contact spherical bearing outer ring 7. Each group of spherical cross lubrication grooves 73 includes two cross-arranged lubrication grooves, and the intersection angle of the two lubrication grooves is 77°, so as to better achieve the drainage of lubricating oil or grease.
[0040] Alternatively, in another embodiment, Figure 5-6 As shown, a spherical axial lubrication groove 75 is provided on the inner spherical surface of the outer ring 7' of the angular contact spherical bearing. There are 12 spherical axial lubrication grooves 75, which are evenly distributed around the circumference of the inner spherical center axis of the outer ring 7' of the angular contact spherical bearing, which is conducive to the uniform distribution of lubricating oil or grease, thereby achieving lubrication of the bearing.
[0041] Example 3
[0042] like Figure 8 As shown, in this embodiment, the bearing seat 5 is not provided with an oil injection hole 10 and the bearing is not provided with a lubrication groove, but a self-lubricating liner 9 is provided between the inner spherical surface of the angular contact spherical plain bearing outer ring 7 and the outer spherical surface of the angular contact spherical plain bearing inner ring 8, as shown in FIG. Figure 8 As shown. The rest of this embodiment is the same as embodiment 1. Therefore, this embodiment provides a self-lubricating angular contact spherical bearing swing arm node, which can realize the self-lubricating function of the angular contact spherical bearing.
[0043] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.
Claims
1. A swing arm node, comprising a pin, an inner spacer, a bearing seat, a fastener and two angular contact spherical bearings, wherein the swing arm node is used to be installed with two swing arm joints, each of the angular contact spherical bearings comprises an angular contact spherical bearing inner ring and an angular contact spherical bearing outer ring, characterized in that: The two angular contact spherical bearing outer rings are mounted on the bearing seat with their backs to each other, the two angular contact spherical bearing inner rings are arranged on the inner sides of the two swing arm joints with their backs to each other, the inner spacer is arranged between the two angular contact spherical bearing inner rings, the two swing arm joints, the two angular contact spherical bearing inner rings and the inner spacer are sleeved on the pin shaft and installed as a whole through the fasteners, and the angular contact spherical bearing inner ring is in spherical contact with the angular contact spherical bearing outer ring.
2. The swing arm node according to claim 1, characterized in that: The bearing load centers of the angular contact spherical bearings are point A and point B respectively, and the distance between point A and point B is greater than the installation distance of the two angular contact spherical bearings.
3. The swing arm node according to claim 1, characterized in that: A layer of elastomer is arranged between the axial end surface of the inner ring of the angular contact spherical bearing and the swing arm joint.
4. The swing arm node according to claim 1, characterized in that: The bearing seat is provided with an oil filling hole, the oil filling hole is connected to the inner cavity of the bearing seat, and the angular contact spherical bearing is provided with a lubrication groove.
5. The swing arm node according to claim 1, characterized in that: The bearing seat is provided with an oil filling hole, the outer surface of the outer ring of the angular contact joint bearing is provided with an external lubrication groove, the oil filling hole is connected to the external lubrication groove, the outer ring of the angular contact joint bearing is provided with a radial lubrication hole in the radial direction, the inner ball surface of the outer ring of the angular contact joint bearing is provided with a lubrication groove, and the external lubrication groove is connected with the lubrication groove on the inner ball surface through the radial lubrication hole.
6. The swing arm node according to claim 4 or 5, characterized in that: The inner spherical surface of the outer ring of the angular contact spherical bearing is provided with a spherical cross lubrication groove and a spherical annular lubrication groove.
7. The swing arm node according to claim 6, characterized in that: There are 8 groups of spherical cross lubrication grooves in total, and the 8 groups of spherical cross lubrication grooves are evenly distributed around the circumference of the central axis of the inner spherical surface of the outer ring of the angular contact joint bearing. Each group of the spherical cross lubrication grooves includes two cross-arranged lubrication grooves, and the crossing angle of the two lubrication grooves is 77°.
8. The swing arm node according to claim 4 or 5, characterized in that: A spherical axial lubrication groove is arranged on the inner spherical surface of the outer ring of the angular contact spherical bearing.
9. The swing arm node according to claim 8, characterized in that: There are 12 spherical axial lubrication grooves, which are evenly distributed around the circumference of the central axis of the inner spherical surface of the outer ring of the angular contact spherical bearing.
10. The swing arm node according to claim 1, characterized in that: A layer of self-lubricating liner is arranged between the inner spherical surface of the outer ring of the angular contact spherical bearing and the outer spherical surface of the inner ring of the angular contact spherical bearing.