Sliding bearing, motor with same, suspension system and vehicle

Abstract

The invention discloses a sliding bearing, a motor with the same, a suspension system and a vehicle, the sliding bearing comprises a sliding fit surface, the sliding fit surface comprises a fit plane and a fit cambered surface, the fit cambered surface is located at the end part of the fit plane, and the fit plane is provided with a sliding groove; the sliding bearing comprises a matching plane and a matching cambered surface, the matching cambered surface bends and extends in the direction away from the matching plane and towards the outer side of the sliding matching surface, the sliding matching surface is suitable for being in sliding fit with a moving part in the first direction, in the first direction, the length of the matching cambered surface is xha, the total length of the sliding bearing is xh, and the matching cambered surface at least meets the condition that xha is larger than or equal to (2 / 15) * xh and smaller than or equal to 0.4 * xh. According to the sliding bearing provided by the embodiment of the invention, by arranging the matching cambered surface, the sliding matching surface of the sliding bearing with the matching cambered surface can be always matched with the moving part when the moving part is bent, so that the stress concentration phenomenon of the sliding bearing can be effectively avoided, and the abrasion between the moving part and the sliding bearing is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of sliding bearings, and in particular to a sliding bearing and a motor, a suspension system and a vehicle having the same. Background Art

[0002] In the related art, when the moving shaft of the linear motor is subjected to force during movement, it is easy to bend or tilt. When the moving shaft bends relative to the sliding bearing, the contact area between the moving shaft and the sliding bearing becomes smaller, which easily leads to stress concentration of the sliding bearing and greater wear between the sliding bearing and the moving shaft. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a sliding bearing having a mating arc surface. When a moving part bends, the sliding bearing having the mating arc surface can ensure that the sliding mating surface of the sliding bearing always fits the moving part, effectively avoiding stress concentration in the sliding bearing and reducing wear between the moving part and the sliding bearing.

[0004] The present invention also provides a motor having the sliding bearing.

[0005] The present invention also provides a suspension system having the motor.

[0006] The present invention also provides a vehicle having the suspension system.

[0007] According to the first aspect of the present invention, the sliding bearing includes a sliding mating surface, which includes a mating plane and a mating arc surface. The mating arc surface is located at the end of the mating plane, and the mating arc surface is bent and extended in a direction away from the mating plane and toward the outside of the sliding mating surface. The sliding mating surface is suitable for sliding mating with a moving part along a first direction. In the first direction, the length of the mating arc surface is xha, and the total length of the sliding bearing is xh. The mating arc surface at least satisfies: (2 / 15)*xh≦xha≦0.4*xh.

[0008] According to the embodiment of the present invention, the sliding bearing is provided with a mating arc surface. When the moving part bends, the sliding bearing with the mating arc surface can always adapt to the sliding mating surface of the sliding bearing and the moving part, thereby effectively avoiding stress concentration in the sliding bearing and reducing wear between the moving part and the sliding bearing.

[0009] In addition, the sliding bearing according to the above embodiment of the present invention may also have the following additional technical features:

[0010] According to some embodiments of the present invention, the mating arc surface at least satisfies: 3 mm ≤ xha ≤ 10 mm.

[0011] According to some embodiments of the present invention, in the second direction, the distance from the outer wall surface of the sliding bearing to the mating plane is xt, and in the second direction, the distance between the two ends of the mating arc surface is xa, where the mating arc surface at least satisfies: 0 < xa ≤ 0.5 * xt, and the first direction and the second direction intersect.

[0012] According to some optional embodiments of the present invention, the mating arc surface at least satisfies: 0.4 mm ≤ xa ≤ 1 mm.

[0013] According to some embodiments of the present invention, the mating arc surfaces are provided at both ends of the mating plane.

[0014] According to some optional embodiments of the present invention, the shapes and sizes of the mating arc surfaces at both ends of the mating plane are the same.

[0015] According to some embodiments of the present invention, the mating arc surface is tangent to the mating plane, and the mating arc surface and the mating plane are smoothly connected.

[0016] According to an embodiment of the second aspect of the present invention, a motor is provided, which includes: a first component and a second component; a sliding bearing according to an embodiment of the first aspect of the present invention, the sliding bearing is provided between the first component and the second component, the first component and the second component move relative to each other along the axial direction of the sliding bearing, and the sliding mating surface slidably mates with the first component or the second component.

[0017] According to the motor of the embodiment of the present invention, by using the sliding bearing according to the embodiment of the first aspect of the present invention, through setting the mating arc surface, when the moving part is bent, the sliding bearing with the mating arc surface can always adapt the sliding mating surface of the sliding bearing to the moving part, effectively avoiding the stress concentration phenomenon of the sliding bearing, so as to reduce the wear between the moving part and the sliding bearing.

[0018] According to some embodiments of the present invention, the first component includes a core shaft, the second component includes a housing, the sliding bearing is provided between the core shaft and the housing, and the sliding mating surface slidably mates with the core shaft.

[0019] According to some optional embodiments of the present invention, in the first direction, the length of the mating arc surface is xha, and the mating arc surface at least satisfies 4 mm ≤ xha ≤ 1 mm.

[0020] According to some embodiments of the present invention, a guide hole is provided in the core shaft, the second component includes a shell, the core shaft is provided in the shell, the inner wall of the shell is provided with a guide rod that slides with the guide hole, the sliding bearing is provided between the guide rod and the guide hole, and the sliding fitting surface slides with the core shaft.

[0021] According to some optional embodiments of the present invention, the sliding bearing located between the core shaft and the housing is defined as a first sliding bearing, and the sliding bearing located between the guide rod and the guide hole is defined as a second sliding bearing. In the first direction, the length of the mating arc surface of the second sliding bearing is greater than the length of the mating arc surface of the first sliding bearing.

[0022] According to some specific embodiments of the present invention, in the first direction, the length of the mating arc surface of the first sliding bearing is xha, and the total length of the first sliding bearing is xh, wherein the mating arc surface at least satisfies: 0.2*xh≦xha≦0.4*xh; and\or, in the first direction, the length of the mating arc surface of the second sliding bearing is xha, and the total length of the second sliding bearing is xh, wherein the mating arc surface at least satisfies: (2 / 15)*xh≦xha≦(1 / 3)*xh.

[0023] According to some specific embodiments of the present invention, in the second direction, the distance between the two ends of the mating arc surface of the second sliding bearing is xa, the distance from the outer wall surface of the second sliding bearing to the mating plane is xt, 0.2*xt≦xa≦0.5*xt, wherein the second direction intersects with the first direction.

[0024] According to a third aspect of the present invention, an embodiment provides a suspension system, comprising the motor according to the embodiment of the second aspect of the present invention.

[0025] According to the suspension system of an embodiment of the present invention, by utilizing the motor described in the embodiment of the second aspect of the present invention, by setting a mating arc surface, the sliding bearing with the mating arc surface can always adapt to the moving part when the moving part bends, and can effectively avoid stress concentration in the sliding bearing, so as to reduce the wear between the moving part and the sliding bearing.

[0026] According to a fourth aspect of the present invention, a vehicle is provided. The vehicle includes the suspension system according to the embodiment of the third aspect of the present invention.

[0027] According to the vehicle of the embodiment of the present invention, by utilizing the suspension system described in the embodiment of the third aspect of the present invention, by setting a mating arc surface, the sliding bearing with the mating arc surface can always adapt to the moving part when the moving part is bent, which can effectively avoid stress concentration in the sliding bearing and reduce wear between the moving part and the sliding bearing.

[0028] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0030] Figure 1 is a schematic structural diagram of a motor according to an embodiment of the present invention;

[0031] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0032] Figure 3 yes Figure 1 Enlarged view of point B in the middle;

[0033] Figure 4 is a schematic structural diagram of a second sliding bearing according to an embodiment of the present invention;

[0034] Figure 5 is a cross-sectional view of a second sliding bearing according to an embodiment of the present invention;

[0035] Figure 6 yes Figure 5 Enlarged view of the middle area;

[0036] Figure 7 is a schematic structural diagram of a first sliding bearing according to an embodiment of the present invention;

[0037] Figure 8 is a cross-sectional view of a first sliding bearing according to an embodiment of the present invention;

[0038] Figure 9 yes Figure 8 Enlarged view of the middle area;

[0039] Figure 10 is a change in the axial force on the first sliding bearing when the xha of the mating arc surface of the first sliding bearing according to an embodiment of the present invention changes;

[0040] Figure 11is a change in the axial force on the first sliding bearing when the xa of the mating arc surface of the first sliding bearing according to an embodiment of the present invention changes;

[0041] Figure 12 is a change in the axial force on the second sliding bearing when the xha of the matching arc surface of the second sliding bearing according to an embodiment of the present invention changes;

[0042] Figure 13 This is a change in the axial force on the second sliding bearing when the xa of the matching arc surface of the second sliding bearing according to an embodiment of the present invention changes.

[0043] Reference numerals: 1000, motor;

[0044] 101. First sliding bearing; 102. Second sliding bearing;

[0045] 11. Sliding mating surface;

[0046] 111. Matching plane; 112. Matching arc surface;

[0047] 12. Fixed surface;

[0048] 2. First component;

[0049] 21. core shaft; 22. first magnetic member; 221. guide hole;

[0050] 3. Second component;

[0051] 31. Housing; 32. Second magnetic member; 33. Guide rod;

[0052] 4. Lower wishbone. DETAILED DESCRIPTION

[0053] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0054] Hereinafter, a sliding bearing according to an embodiment of the present invention will be described with reference to the accompanying drawings.

[0055] like Figures 1-9 As shown, the sliding bearing according to the embodiment of the present invention includes a sliding fitting surface 11 .

[0056] The sliding mating surface 11 includes a mating plane 111 and a mating arc surface 112. The mating arc surface 112 is located at the end of the mating plane 111. The mating arc surface 112 bends and extends in a direction away from the mating plane 111 and toward the outside of the sliding mating surface 11. The sliding mating surface 11 is suitable for sliding mating with the moving part along the first direction.

[0057] When the moving part moves along the first direction relative to the sliding bearing and the moving part shakes along the radial direction of the sliding bearing, the matching plane 111 can limit the shaking amplitude of the moving part, thereby ensuring that the moving part can move relatively stably along the first direction relative to the sliding bearing.

[0058] When the moving part bends, the moving part is adapted to mate with the mating arc surface 112. In other words, the sliding bearing having the mating arc surface 112 can ensure that the sliding mating surface 11 of the sliding bearing always mates with the moving part when the moving part bends, thereby increasing the mating area between the sliding mating surface 11 and the moving part. This ensures that uniform force acts on the sliding mating surface 11 of the sliding bearing, effectively avoiding stress concentration in the sliding bearing and reducing wear between the moving part and the sliding bearing.

[0059] Specifically, by setting the mating arc surface 112, space can be provided at the end of the sliding bearing to accommodate the eccentricity and tilt of the moving part, so that the moving part can smoothly transition and adjust the center under the guidance of the sliding bearing, thereby greatly reducing the stress concentration of the sliding bearing, reducing the risk of wear and yield failure of the sliding bearing, alleviating the problems of large starting force and large axial resistance of the system caused by the tilt of the moving part and the deformation of the moving part due to lateral force, and reducing the loss of friction energy between the moving part and the mating bearing.

[0060] In addition, since the provision of the mating arc surface 112 can reduce the contact area between the sliding bearing and the moving part, when the gap between the moving part and the sliding bearing is small and is in a low-temperature working condition, the risk of the sliding bearing and the moving part directly locking and being unable to move relative to each other can be greatly reduced. Instead, the problem is alleviated by local deformation of the contact position, retaining the possibility of the system continuing to move.

[0061] In the first direction, the length of the matching arc surface 112 is xha, the total length of the sliding bearing is xh, and the matching arc surface 112 at least satisfies: (2 / 15)*xh≦xha≦0.4*xh.

[0062] Among them, (2 / 15)*xh≦xha is made so that the matching arc surface 112 has a sufficient length to better guide the moving part to smoothly transition and align, thereby reducing the risk of stress concentration, wear, and yield failure of the sliding bearing.

[0063] Make xha ≤ 0.4 * xh to control the length of the mating arc surface 112 in the first direction, thereby reserving sufficient space for the mating plane 111.

[0064] Therefore, the sliding bearing according to the embodiment of the present invention has a mating arc surface 112. When the moving part is bent, the sliding bearing with the mating arc surface 112 can always make the sliding mating surface 11 of the sliding bearing adapt to the moving part, effectively avoiding the stress concentration phenomenon of the sliding bearing, and reducing the wear between the moving part and the sliding bearing.

[0065] The sliding bearing according to specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0066] In some specific embodiments of the present invention, as Figures 1-9 shown, the sliding bearing includes a sliding mating surface 11.

[0067] In some embodiments of the present invention, the mating arc surface 112 at least satisfies: 3 mm ≤ xha ≤ 10 mm, so that the mating arc surface 112 has sufficient length to adapt to the bending and tilting of the moving part, and can guide the moving part to smoothly transition and align, thereby reducing the risks of stress concentration, wear, and yield failure of the sliding bearing.

[0068] In some embodiments of the present invention, as Figure 9 shown, in the second direction, the distance from the outer wall surface of the sliding bearing to the mating plane 111 is xt, and in the second direction, the distance between the two ends of the mating arc surface 112 is xa, where the mating arc surface 112 at least satisfies: 0 < xa ≤ 0.5 * xt, and the first direction and the second direction intersect.

[0069] Among them, making the distance between the two ends of the mating arc surface 112 in the second direction less than or equal to 0.5xt ensures the structural strength of the mating bearing. Specifically, setting the mating arc surface 112 will form a notch on the sliding bearing. If the length of xa is too long, the notch on the sliding bearing will be too large, which will affect the structural strength of the sliding bearing.

[0070] In some embodiments of the present invention, as Figure 6 shown, the mating arc surface 112 can be a continuous arc with the same curvature. At this time, in the longitudinal section parallel to the first direction, the curve formed by the projection of the mating arc surface 112 is a quadratic function curve. The mating arc surface 112 can also be other shapes. For example, in the longitudinal section parallel to the first direction, the curve formed by the projection of the mating arc surface 112 is a cubic or quartic function, and no more restrictions are made here.

[0071] In some embodiments of the present invention, the mating arc surface 112 at least satisfies: 0.4 mm ≤ xa ≤ 1 mm to control the size of the mating arc surface 112 in the second direction.

[0072] The 0.4mm≦xa setting ensures that the mating arc surface 112 has sufficient length to accommodate the bending and tilting of the moving part, thereby guiding the moving part to smoothly transition and align, thereby reducing the risk of stress concentration, wear, and yield failure in the sliding bearing. The xa setting ensures that the 1mm setting ensures the structural strength of the mating bearing.

[0073] In some embodiments of the present invention, Figure 6 、 Figure 9 As shown, both end portions of the mating plane 111 are provided with mating arc surfaces 112, so that when the moving part bends or tilts, the sliding mating surface 11 can fit the outer surface of the moving part more closely, adapt to the direction in which the moving part bends or tilts, increase the mating area between the sliding mating surface 11 and the moving part, and then guide the moving part to smoothly transition and align, thereby reducing the risk of stress concentration, wear, and yield failure of the sliding bearing.

[0074] Specifically, when the moving part bends, the two matching arc surfaces 112 can be used to guide the moving part to smoothly transition and adjust the center, thereby reducing the risk of stress concentration, wear, and yield failure of the sliding bearing.

[0075] In some optional embodiments of the present invention, the matching arc surfaces 112 located at both ends of the matching plane 111 have the same shape and size.

[0076] In some other optional embodiments of the present invention, the shapes and sizes of the matching arc surfaces 112 located at both ends of the matching plane 111 are different.

[0077] In some embodiments of the present invention, the mating arc surface 112 is tangent to the mating plane 111, and the mating arc surface 112 and the mating plane 111 are smoothly transitioned and connected, so that when the moving part bends and tilts, it can more smoothly guide the moving part to transition and adjust the center.

[0078] At the same time, the mating arc surface 112 is made tangent to the mating plane 111. When the moving part changes from the position in contact with the mating plane 111 to the area in contact with the mating arc surface 112, the shape of the connection between the mating arc surface 112 and the mating plane 111 can be made to fit the moving part more closely, thereby increasing the contact area between the moving part and the sliding mating surface 11 and reducing the risk of stress concentration, wear, and yield failure of the sliding bearing.

[0079] In some embodiments of the present invention, the sliding bearing is made of a self-lubricating substrate inlaid with solid lubricating columns. The self-lubricating substrate can be a copper alloy, a nickel alloy, etc., and the solid lubricating columns can be high-purity graphite, oil-containing graphite, modified lubricating material graphite, etc., to lubricate the relative sliding between the moving part and the sliding bearing, thereby reducing the wear between the bearing and the moving part.

[0080] The motor 1000 according to the embodiment of the present invention is described below. The motor 1000 according to the embodiment of the present invention comprises a first component 2, a second component 3 and a sliding bearing according to the above embodiment of the present invention.

[0081] The sliding bearing is provided between the first component 2 and the second component 3 . The second component 3 and the first component 2 move relative to each other along the axial direction of the sliding bearing. The sliding fitting surface 11 is in sliding fit with the second component 3 or the first component 2 .

[0082] For example, the sliding bearing is fixed to the second component 3, and the sliding fitting surface 11 of the sliding bearing is slidingly fitted with the first component 2. The first component 2 defines a moving part. When the first component 2 bends or tilts relative to the second component 3, the sliding fitting surface 11 of the sliding bearing is always adapted to the first component 2, thereby increasing the fitting area between the sliding fitting surface 11 and the first component 2. This ensures that uniform force acts on the sliding fitting surface 11 of the sliding bearing, which can effectively avoid stress concentration in the sliding bearing, thereby reducing wear between the first component 2 and the sliding bearing, and thereby facilitating increasing the service life of the motor 1000.

[0083] Alternatively, the sliding bearing is fixed to the first component 2, and the sliding fitting surface 11 of the sliding bearing is slidingly fitted with the second component 3. The second component 3 defines a moving part. When the second component 3 bends or tilts relative to the first component 2, the sliding fitting surface 11 of the sliding bearing is always adapted to the second component 3, thereby increasing the fitting area between the sliding fitting surface 11 and the second component 3. This ensures that uniform force acts on the sliding fitting surface 11 of the sliding bearing, which can effectively avoid stress concentration in the sliding bearing, thereby reducing wear between the second component 3 and the sliding bearing, and thereby facilitating increasing the service life of the motor 1000.

[0084] According to the motor 1000 of the embodiment of the present invention, by utilizing the sliding bearing according to the above-mentioned embodiment of the present invention and providing the mating arc surface 112, the sliding bearing having the mating arc surface 112 can always make the sliding mating surface 11 of the sliding bearing fit with the moving part when the moving part bends, thereby effectively avoiding stress concentration in the sliding bearing and reducing wear between the moving part and the sliding bearing.

[0085] In some embodiments of the present invention, Figure 1As shown, the first component 2 includes a core shaft 21, and the second component 3 includes a shell 31. A sliding bearing is provided between the core shaft 21 and the shell 31. The sliding fitting surface 11 slides with the core shaft 21. When the core shaft 21 is bent or tilted relative to the shell 31, the core shaft 21 is adapted to the fitting arc surface 112 to increase the fitting area between the sliding fitting surface 11 and the core shaft 21. This ensures that uniform force acts on the sliding fitting surface 11 of the sliding bearing, which can effectively avoid stress concentration in the sliding bearing, thereby reducing wear between the second component 3 and the sliding bearing, and thereby facilitating increasing the service life of the motor 1000.

[0086] like Figure 1 、 Figure 3 As shown, in this embodiment, the sliding bearing includes a fixed surface 12 and a sliding fitting surface 11, the shell 31 is located on the outside of the core shaft 21, the outer wall surface of the sliding bearing defines the fixed surface 12, the fixed surface 12 is fixedly fitted with the shell 31, and the inner wall surface of the sliding bearing defines the sliding fitting surface 11, and the sliding fitting surface 11 is slidingly fitted with the core shaft 21.

[0087] The sliding mating surface 11 is annular, and the mating plane 111 and the mating arc surface 112 are also annular.

[0088] When the core shaft 21 bends or tilts, the sliding fitting surface 11 of the sliding bearing always adapts to the core shaft 21, thereby increasing the fitting area between the sliding fitting surface 11 and the core shaft 21. This ensures that uniform force acts on the sliding fitting surface 11 of the sliding bearing, and can effectively avoid stress concentration in the sliding bearing, thereby reducing the wear between the core shaft 21 and the sliding bearing, thereby facilitating increasing the service life of the motor 1000.

[0089] In some examples, the fixing surface 12 of the sliding bearing is a plane in a longitudinal section parallel to the first direction, so that the outer wall surface of the sliding bearing can be interference fit with the housing 31 , thereby fixing the sliding bearing on the housing 31 .

[0090] In some optional embodiments of the present invention, Figure 6 、 Figure 9 As shown, in the first direction, the length of the mating arc surface 112 is xha, and the mating arc surface 112 at least satisfies 4mm≦xha≦10mm, so that the mating arc surface 112 has sufficient length to adapt to the bending and tilt of the core shaft 21, and then can guide the core shaft 21 to smoothly transition and align, thereby reducing the risk of stress concentration, wear, and yield failure of the sliding bearing.

[0091] In some optional embodiments of the present invention, Figure 1As shown, a guide hole 221 is provided in the core shaft 21, the second component 3 includes a shell 31, the core shaft 21 is provided in the shell 31, and the inner wall of the shell 31 is provided with a guide rod 33 that slides with the guide hole 221. A sliding bearing is provided between the guide rod 33 and the guide hole 221, and the sliding fitting surface 11 slides with the guide rod 33. When the guide rod 33 is bent or tilted relative to the core shaft 21, the guide rod 33 is adapted to the fitting arc surface 112 to increase the fitting area between the sliding fitting surface 11 and the guide rod 33, which ensures uniform force on the sliding fitting surface 11 of the sliding bearing, can effectively avoid stress concentration in the sliding bearing, so as to reduce the wear between the second component 3 and the sliding bearing, thereby facilitating the increase in the service life of the motor 1000.

[0092] like Figure 1 、 Figure 2 As shown, in this embodiment, the sliding bearing includes a fixed surface 12 and a sliding fitting surface 11, the core shaft 21 is located on the outside of the guide rod 33, the outer wall surface of the sliding bearing defines the fixed surface 12, the fixed surface 12 is fixedly fitted with the core shaft 21, and the inner wall surface of the sliding bearing defines the sliding fitting surface 11, and the sliding fitting surface 11 is slidingly fitted with the guide rod 33.

[0093] When the guide rod 33 bends or tilts, the sliding fitting surface 11 of the sliding bearing always adapts to the guide rod 33, thereby increasing the fitting area between the sliding fitting surface 11 and the guide rod 33. This ensures that uniform force acts on the sliding fitting surface 11 of the sliding bearing, and can effectively avoid stress concentration in the sliding bearing, thereby reducing the wear between the guide rod 33 and the sliding bearing, thereby facilitating increasing the service life of the motor 1000.

[0094] In some examples, the fixing surface 12 of the sliding bearing is a plane in a longitudinal section parallel to the first direction, so that the outer wall surface of the sliding bearing can be interference fit with the inner wall of the guide hole 221, thereby fixing the sliding bearing on the core shaft 21.

[0095] In some specific embodiments of the present invention, Figure 1 As shown, the first component 2 includes a first magnetic component 22, which is externally mounted on the core shaft 21. The second component 3 includes a second magnetic component 32, which is fixed to the inner wall of the outer shell 31. The second magnetic component 32 is coupled to the first magnetic component 22. When the second magnetic component 32 is subjected to magnetic force, it moves along the first direction, thereby driving the outer shell 31 to move along the first direction, so that the motor 1000 outputs force outward.

[0096] In some embodiments, a lower fork arm 4 is provided at the lower end of the housing 31 , or the lower fork arm 4 defines the bottom of the housing 31 .

[0097] In some specific embodiments of the present invention, Figure 1As shown in the figure, the sliding bearing located between the mandrel 21 and the outer shell 31 is defined as the first sliding bearing 101, and the sliding bearing located between the guide rod 33 and the guide hole 221 is defined as the second sliding bearing 102. In the first direction, the length of the mating arc surface 112 of the second sliding bearing 102 is greater than the length of the mating arc surface 112 of the first sliding bearing 101, so as to facilitate the adaptation of the mating arc surface 112 to the guide rod 33, reduce the axial force on the second sliding bearing 102 to a greater extent, and thus effectively avoid the stress concentration phenomenon on the second sliding bearing 102, so as to fully reduce the wear between the guide rod 33 and the second sliding bearing 102, and then facilitate the increase of the service life of the motor 1000.

[0098] Specifically, due to factors such as space and position, the axial force on the second sliding bearing 102 is relatively large, and the length of the second sliding bearing 102 in the first direction is relatively long. Correspondingly, while ensuring the strength of the second sliding bearing 102, the mating arc surface 112 on the second sliding bearing 102 can be set to be relatively long, so as to make full use of the mating arc surface 112 to reduce the axial force on the second sliding bearing 102, effectively avoid the stress concentration phenomenon on the second sliding bearing 102, so as to fully reduce the wear between the guide rod 33 and the second sliding bearing 102, and then facilitate the increase of the service life of the motor 1000.

[0099] In some embodiments, as Figure 9 shown, in the first direction, the length of the mating arc surface 112 of the first sliding bearing 101 is xha, and the total length of the first sliding bearing 101 is xh, where the mating arc surface 112 at least satisfies: 0.2 * xh ≤ xha ≤ 0.4 * xh, so that the mating arc surface 112 can better guide the mandrel 21 to smoothly transition and align, and thus reduce the risks of stress concentration, wear, and yield failure of the first sliding bearing 101.

[0100] In some examples, as Figure 9 shown, the length xha of the mating arc surface 112 of the first sliding bearing 101 is between 3 mm and 6 mm.

[0101] In some examples, in the second direction, the distance from the outer wall surface of the first sliding bearing 101 to its mating plane 111 is xt, and the distance between the two ends of the mating arc surface 112 of the first sliding bearing 101 is xa, 0 < xa ≤ 0.5 * xt, so that xa ≤ 0.5 * xt to ensure the structural strength of the mating bearing. Specifically, the mating arc surface 112 will form a notch on the first sliding bearing 101. If the length of xa is too long, the notch on the first sliding bearing 101 will be too large, which will affect the structural strength of the first sliding bearing 101.

[0102] Furthermore, the first sliding bearing 101 includes two mating arc surfaces 112, which are located at both end ends of the mating plane 111. The lengths xha of the two mating arc surfaces 112 can be the same or different; the lengths xa of the two mating arc surfaces 112 can be the same or different, and no excessive restrictions are imposed here.

[0103] like Figure 9 As shown, the first direction extends in the up-down direction, and the first sliding bearing 101 includes two mating arc surfaces 112 , wherein one mating arc surface 112 is located at the upper end of the mating plane 111 , and the other mating arc surface 112 is located at the lower end of the mating plane 111 .

[0104] The total length xh of the first sliding bearing 101 in the first direction is 15 mm, and the distance xt from the outer wall surface of the first sliding bearing 101 to the matching plane 111 thereof in the second direction is 4.5 mm.

[0105] Figure 10 (a) shows the change of the axial force of the first sliding bearing 101 when the xha of the mating arc surface 112 of the first sliding bearing 101 located at the upper end of the mating plane 111 changes.

[0106] Figure 10 (b) shows the change of the axial force of the first sliding bearing 101 when the xha of the mating arc surface 112 of the first sliding bearing 101 located at the lower end of the mating plane 111 changes.

[0107] When the horizontal coordinates are the same, that is, xha is the same, if xa gradually increases, the axial force of the first sliding bearing 101 gradually decreases.

[0108] It can be seen from the figure that when xha is between 3 mm and 6 mm, the axial force of the first sliding bearing 101 is relatively small.

[0109] Figure 11 (a) shows the change in the axial force of the first sliding bearing 101 when the xa of the mating arc surface 112 of the first sliding bearing 101 located at the upper end of the mating plane 111 changes. At this time, the xha of the two mating arc surfaces 112 are both 3 mm.

[0110] Figure 11 (b) shows the change in the axial force of the first sliding bearing 101 when the xa of the mating arc surface 112 of the first sliding bearing 101 located at the lower end of the mating plane 111 changes. At this time, the xha of the two mating arc surfaces 112 are both 3 mm.

[0111] according to Figure 11It can be seen that when xa changes, the influence on the axial force of the first sliding bearing 101 is small. Therefore, it is set that 0 < xa ≦ 0.5 * xt to ensure the strength of the first sliding bearing 101 while ensuring the length of the mating arc surface 112.

[0112] In addition, for the mating bearing without the mating arc surface 112, the length of the bearing on the motor 1000 in the first direction is 15 mm, the thickness of the bearing on the motor 1000 in the second direction is 4.5 mm, and the axial force of the upper bearing is 32.27 N. Through Figure 10 and Figure 11 The data in show that by controlling the dimensions of xha and xa of the first sliding bearing 101, the axial force of the first sliding bearing 101 can be reduced.

[0113] In some embodiments, in the first direction, the total length of the second sliding bearing 102 is xh, and the length of the mating arc surface 112 of the second sliding bearing 102 is xha, where (2 / 15) * xh ≦ xha ≦ (1 / 3) * xh, so that the mating arc surface 112 of the second sliding bearing 102 can better guide the guide rod 3 and smoothly transition and align, thereby reducing the risk of stress concentration, wear, and yield failure of the second sliding bearing 102.

[0114] In some examples, the length of the mating arc surface 112 of the second sliding bearing 102 is between 4 mm and 10 mm.

[0115] In some examples, in the second direction, the distance between the two ends of the mating arc surface 112 of the second sliding bearing 102 is xa, and the distance from the outer wall surface of the second sliding bearing 102 to the mating plane 111 is xt, where 0.2 * xt ≦ xa ≦ 0.5 * xt.

[0116] Among them, setting 0.2 * xt ≦ xa enables the mating arc surface 112 of the second sliding bearing 102 to have sufficient length to guide the guide rod 33 to smoothly transition and align, thereby reducing the risk of stress concentration, wear, and yield failure of the second sliding bearing 102.

[0117] Setting xa ≦ 0.5 * xt ensures the structural strength of the second sliding bearing 102. Specifically, the mating arc surface 112 will form a notch on the second sliding bearing 102. If the length of xa is too long, the notch on the second sliding bearing 102 will be too large, which will affect the structural strength of the second sliding bearing 102.

[0118] Furthermore, the second sliding bearing 102 includes two mating arc surfaces 112, which are located at both end ends of the mating plane 111. The lengths xha of the two mating arc surfaces 112 can be the same or different; the lengths xa of the two mating arc surfaces 112 can be the same or different.

[0119] like Figure 6 As shown, the first direction extends in the up-down direction (it should be understood here that the above direction limitation is only for the convenience of describing the accompanying drawings and will not limit the actual setting position and direction of the sliding bearing), and the second sliding bearing 102 includes two mating arc surfaces 112, one of which is located at the upper end of the mating plane 111, and the other is located at the lower end of the mating plane 111.

[0120] The total length xh of the second sliding bearing 102 in the first direction is 30 mm, and the distance xt from the outer wall surface of the second sliding bearing 102 to the matching plane 111 thereof in the second direction is 2 mm.

[0121] Figure 12 (a) shows the change of the axial force of the second sliding bearing 102 when the xha of the mating arc surface 112 of the second sliding bearing 102 located at the upper end of the mating plane 111 changes.

[0122] Figure 12 (b) shows the change of the axial force of the second sliding bearing 102 when the xha of the mating arc surface 112 of the second sliding bearing 102 located at the lower end of the mating plane 111 changes.

[0123] When the horizontal coordinates are the same, that is, xha is the same, if xa gradually increases, the axial force of the second sliding bearing 102 gradually decreases.

[0124] It can be seen from the figure that when xha is between 3 mm and 6 mm, the axial force of the second sliding bearing 102 is relatively small.

[0125] Figure 13 (a) shows the change in the axial force of the second sliding bearing 102 when the xa of the mating arc surface 112 of the second sliding bearing 102 located at the upper end of the mating plane 111 changes. At this time, the xha of the two mating arc surfaces 112 are both 8 mm.

[0126] Figure 13 (b) shows the change in the axial force of the second sliding bearing 102 when the xa of the mating arc surface 112 of the second sliding bearing 102 located at the lower end of the mating plane 111 changes. At this time, the xha of the two mating arc surfaces 112 are both 8 mm.

[0127] according to Figure 13It can be seen that when xha is between 0.4 and 1 mm, the axial force of the second sliding bearing 102 is relatively small.

[0128] In addition, for the matching bearing without the matching arc surface 112, the length of the lower bearing of the motor 1000 in the first direction is 30 mm, the thickness of the lower bearing of the motor 1000 in the second direction is 2 mm, and the axial force of the lower bearing is 183.06 N. Figure 12 and Figure 13 The data in FIG. 1 show that the axial force of the second sliding bearing 102 can be reduced by controlling the sizes of xha and xa of the second sliding bearing 102 .

[0129] In some embodiments of the present invention, the coaxiality requirements of the first component 2 and the second component 3 in the motor 1000 system are high, but actual processing and assembly will make it impossible for the two to be completely coaxial, and there will be a certain eccentricity and tilt. The eccentricity and tilt will be reflected in the fact that the axial center lines of the core shaft 21 and the guide rod 33 do not coincide. In addition, the existence of radial magnetic tension between the first component 2 and the second component 3 will cause the sliding bearing to be subjected to lateral forces that change with the movement process. The magnitude of the lateral force is strongly related to the coaxiality of the motor 1000 system.

[0130] As the eccentricity and tilt increase, the system forces acting on the motor 1000 during its extension and compression movements become unstable, the frictional resistance of the sliding bearing increases, and the starting force at the moment the motor 1000 transitions from static to motion increases. That is, the force at the moment static friction transitions to dynamic friction also increases, resulting in high energy consumption during the operation of the motor 1000, significant wear on the sliding bearing, and increased operating costs. Furthermore, the sliding bearing material typically has a greater thermal expansion coefficient than the guide rod 33 and core shaft 21. When operating at low temperatures, the sliding bearing shrinks more than the guide rod 33 and core shaft 21, reducing the gap between the first sliding bearing 101 and core shaft 21 and the gap between the second sliding bearing 102 and the guide rod 33.

[0131] In order to ensure that the inclination between the first component 2 and the second component 3 is small when subjected to lateral force, it is necessary to control the gap between the first sliding bearing 101 and the core shaft 21, and the second sliding bearing 102 and the guide rod 33 to be small. Then, it is possible that the gap is reduced under low-temperature conditions, causing the first sliding bearing 101 and the core shaft 21, and the second sliding bearing 102 and the guide rod 33 to be stuck.

[0132] By providing a mating arc surface 112, this embodiment can reduce the contact between the first sliding bearing 101 and the core shaft 21, and the contact area between the second sliding bearing 102 and the guide rod 33 when locking occurs between the first sliding bearing 101 and the core shaft 21, and between the second sliding bearing 102 and the guide rod 33, thereby making it easier to separate the first sliding bearing 101 and the core shaft 21, and to separate the second sliding bearing 102 and the guide rod 33.

[0133] The following describes a suspension system according to an embodiment of the present invention. The suspension system according to an embodiment of the present invention includes the motor 1000 according to the above-mentioned embodiment of the present invention.

[0134] According to the suspension system of the embodiment of the present invention, by utilizing the motor 1000 according to the above-mentioned embodiment of the present invention and setting the mating arc surface 112, the sliding bearing having the mating arc surface 112 can always make the sliding mating surface 11 of the sliding bearing adapt to the moving part when the moving part bends, thereby effectively avoiding the stress concentration phenomenon in the sliding bearing and reducing the wear between the moving part and the sliding bearing.

[0135] A vehicle according to an embodiment of the present invention is described below. The vehicle according to an embodiment of the present invention includes the suspension system according to the above-described embodiment of the present invention.

[0136] According to the vehicle of the embodiment of the present invention, by utilizing the suspension system according to the above-mentioned embodiment of the present invention, by setting the mating arc surface 112, the sliding bearing having the mating arc surface 112 can always make the sliding mating surface 11 of the sliding bearing adapt to the moving part when the moving part bends, which can effectively avoid the stress concentration phenomenon of the sliding bearing and reduce the wear between the moving part and the sliding bearing.

[0137] The motor 1000 , the suspension system, and other components and operations of the vehicle according to the embodiment of the present invention are well known to those skilled in the art and will not be described in detail here.

[0138] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more. In the description of the present invention, a first feature "above" or "below" a second feature may include the first and second features being in direct contact, or the first and second features not being in direct contact but being in contact through another feature between them.

[0139] In the description of the present invention, “on”, “above” and “above” a first feature of a second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0140] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0141] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0142] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A sliding bearing, characterized in that: Comprising a sliding mating surface, the sliding mating surface includes a mating plane (111) and a mating arc surface (112), the mating arc surface (112) is located at the end of the mating plane (111), and the mating arc surface (112) extends in a direction away from the mating plane (111) and towards the outside of the sliding mating surface in a curved manner. Wherein, the sliding mating surface is adapted to slidably mate with a moving part in a first direction. In the first direction, the length of the mating arc surface (112) is xha, the total length of the sliding bearing is xh, and the mating arc surface (112) at least satisfies: (2 / 15)*xh ≤ xha ≤ 0.4*xh.

2. The sliding bearing according to claim 1, characterized in that The mating arc surface (112) at least satisfies: 3mm ≤ xha ≤ 10mm.

3. The sliding bearing according to claim 1, characterized in that In a second direction, the distance from the outer wall surface of the sliding bearing to the mating plane (111) is xt. In the second direction, the distance between the two ends of the mating arc surface (112) is xa, wherein the mating arc surface (112) at least satisfies: 0 < xa ≤ 0.5*xt, and the first direction and the second direction intersect.

4. The sliding bearing according to claim 3, characterized in that Wherein the mating arc surface (112) at least satisfies: 0.4mm ≤ xa ≤ 1mm.

5. The sliding bearing according to claim 1, characterized in that The mating arc surfaces (112) are provided at both ends of the mating plane (111).

6. The sliding bearing according to claim 5, characterized in that The shapes and sizes of the mating arc surfaces (112) located at both ends of the mating plane (111) are the same.

7. The sliding bearing according to any one of claims 1 to 6, characterized in that: The mating arc surface (112) is tangent to the mating plane (111), and the mating arc surface (112) is smoothly and transitionally connected to the mating plane (111).

8. A motor, characterized in that: Comprising: A first component (2) and a second component (3); A sliding bearing, the sliding bearing being the sliding bearing according to any one of claims 1 - 7. The sliding bearing is provided between the first component (2) and the second component (3), the first component (2) and the second component (3) move relative to each other along the axial direction of the sliding bearing, and the sliding mating surface slidably mates with the first component (2) or the second component (3).

9. The motor according to claim 8, characterized in that The first component (2) includes a core shaft (21), the second component (3) includes a housing (31), the sliding bearing is provided between the core shaft (21) and the housing (31), and the sliding mating surface slidably mates with the core shaft (21).

10. The motor according to claim 9, characterized in that In the first direction, the length of the mating arc surface (112) is xha, and the mating arc surface (112) at least satisfies 4mm ≤ xha ≤ 10mm.

11. The motor according to claim 9, characterized in that A guiding hole (221) is provided in the core shaft (21), the second component (3) includes a housing (31), the core shaft (21) is provided in the housing (31), a guiding rod (33) slidably mating with the guiding hole (221) is provided on the inner wall of the housing (31), the sliding bearing is provided between the guiding rod (33) and the guiding hole (221), and the sliding mating surface slidably mates with the core shaft (21).

12. The motor according to claim 11, characterized in that The sliding bearing located between the core shaft (21) and the housing (31) is defined as a first sliding bearing (101), and the sliding bearing located between the guide rod (33) and the guide hole (221) is defined as a second sliding bearing (102). In the first direction, the length of the matching arc surface (112) of the second sliding bearing (102) is greater than the length of the matching arc surface (112) of the first sliding bearing (101).

13. The motor according to claim 12, characterized in that In the first direction, the length of the matching arc surface (112) of the first sliding bearing (101) is xha, the total length of the first sliding bearing (101) is xh, wherein the matching arc surface (112) at least satisfies: 0.2*xh≦xha≦0.4*xh; and\or In the first direction, the length of the matching arc surface (112) of the second sliding bearing (102) is xha, and the total length of the second sliding bearing (102) is xh, wherein the matching arc surface (112) at least satisfies: (2 / 15)*xh≦xha≦(1 / 3)*xh.

14. The motor according to claim 12, characterized in that In the second direction, the distance between the two ends of the matching arc surface (112) of the second sliding bearing is xa, the distance from the outer wall surface of the second sliding bearing to the matching plane (111) is xt, 0.2*xt≦xa≦0.5*xt, wherein the second direction intersects with the first direction.

15. A suspension system, characterized in that: A motor (1000) comprising any one of claims 8 to 14.

16. A vehicle, characterized in that: Comprising the suspension system of claim 15.

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