Ball stud assembly and vehicle

Abstract

The utility model discloses a ball head pin assembly and vehicle, ball head pin assembly includes: ball head pin has the first end and second end who arranges along the axial direction of ball head pin and opposite setting, and the second end has the ball head, elastic bushing, and elastic bushing is equipped with the positioning cavity, and the ball head is assembled in the positioning cavity, wherein, along the axial direction of ball head pin, the cavity wall of ball head and positioning cavity forms first compensation space, and at least part first compensation space can be embedded by the ball head when ball head pin moves relative to elastic bushing along the preset direction, wherein, the preset direction is the direction from the first end to the second end. The ball head pin assembly can improve the problem that the assembly effect of two components connected by it is poor.

Description

Technical Field

[0001] This utility model relates to the field of vehicle parts technology, and in particular to a ball joint assembly and a vehicle. Background Technology

[0002] During vehicle assembly, many components require the use of ball joint assemblies for installation. As a key component connecting two parts, the ball joint assembly plays a crucial role in the overall performance of the vehicle. However, when manufacturing or assembly errors occur between two parts, causing them to be too close together, the ball joint assembly will transmit force in the opposite direction to these two parts, causing at least one part to be lifted, severely affecting the assembly result. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a ball joint assembly that can improve the problem of poor assembly effect of the two components connected by it.

[0004] This utility model also proposes a vehicle having the above-mentioned ball joint assembly.

[0005] According to a first aspect of the present invention, a ball joint assembly includes: a ball joint having a first end and a second end arranged along the axial direction of the ball joint and disposed opposite to each other, the second end having a ball head; and an elastic bushing having a positioning cavity, the ball head being fitted into the positioning cavity. Wherein, along the axial direction of the ball head pin, a first compensation space is formed between the ball head and the cavity wall of the positioning cavity; at least a portion of the first compensation space can be embedded by the ball head when the ball head pin moves relative to the elastic bushing in a preset direction, wherein the preset direction is the direction from the first end to the second end.

[0006] The ball joint assembly according to the embodiments of the present utility model has at least the following beneficial effects: The aforementioned ball-end pin assembly is used to connect the first component and the second component, wherein the first component and the second component are arranged sequentially and at intervals along a preset direction. When the distance between the first component and the second component along the preset direction is a standard design distance, a first compensation space is formed between the ball end and the cavity wall of the positioning cavity when the first component and the second component are connected by the ball-end pin assembly. If the distance between the first component and the second component along the preset direction is too close due to manufacturing errors and / or assembly errors, when the ball end of the ball-end pin is assembled into the positioning cavity of the elastic bushing, the ball end pin will be subjected to a force along the preset direction, thereby further squeezing the ball end into the first compensation space. In this way, the problem of poor assembly effect caused by the first component and / or the second component being lifted by the ball-end pin assembly due to the distance between the first component and the second component along the preset direction can be improved.

[0007] According to some embodiments of the present invention, the positioning cavity includes a first chamber and a second chamber communicating with the first chamber, the first chamber and the second chamber being arranged sequentially along the preset direction; at least a portion of the ball head is assembled in the first chamber and fits against the cavity wall of the first chamber, at least a portion of the space of the second chamber is set as the first compensation space, and the ball head can be squeezed into the second chamber and fit against the cavity wall of the second chamber; Wherein, a plane perpendicular to the preset direction is defined as a reference plane, and the projection of the ball head on the reference plane covers the projection of the docking position of the first chamber and the second chamber on the reference plane.

[0008] According to some embodiments of the present invention, along the preset direction, the cross-sectional area of ​​the first chamber perpendicular to the preset direction first increases and then decreases; and / or, along the preset direction, the cross-sectional area of ​​the second chamber perpendicular to the preset direction also first increases and then decreases.

[0009] According to some embodiments of the present invention, the cavity wall of the first chamber is a first spherical surface, and the cavity wall of the second chamber is a second spherical surface; The diameters of the first spherical surface, the second spherical surface, and the head of the ball are the same.

[0010] According to some embodiments of the present invention, the line connecting the center of the first chamber and the center of the second chamber is coaxial with the axis of the ball head pin, and the distance between the center of the first chamber and the center of the second chamber is in the range of 1.4mm-1.8mm.

[0011] According to some embodiments of the present invention, the side of the ball head away from the first end is a planar structure, the positioning cavity and the side of the planar structure opposite to the preset direction are arc-shaped structures, and the concave direction of the arc-shaped structure is opposite to the planar structure, and the planar structure and the arc-shaped structure form the first compensation space.

[0012] According to some embodiments of the present invention, a second compensation space is further formed between the ball head and the cavity wall of the positioning cavity, and the second compensation space can be embedded by the ball head when the ball head pin moves relative to the elastic bushing in a direction different from the axial direction of the ball head pin.

[0013] According to some embodiments of the present invention, the ball head includes a first part and a second part, the first part and the second part are arranged along the preset direction, the peripheral sidewall of the first part is fitted with the cavity wall of the positioning cavity, and the second part and the cavity wall of the positioning cavity form a first compensation space and a second compensation space.

[0014] According to some embodiments of the present invention, the cross-sectional area of ​​the second part gradually decreases along the preset direction, wherein the cross-section of the second part is perpendicular to the preset direction.

[0015] A vehicle according to a second aspect embodiment of the present invention includes: a ball joint assembly as described above; a first component; and a second component, wherein the first component and the second component are arranged sequentially and spaced apart along a preset direction; wherein the ball joint is connected to the first component, and the elastic bushing is connected to the second component.

[0016] The vehicle according to the embodiments of this utility model has at least the following beneficial effects: In the aforementioned vehicle, when the distance between the first component and the second component along the preset direction is the standard design distance, a first compensation space is formed between the ball head and the cavity wall of the positioning cavity when the first component and the second component are connected by the ball head assembly. If the distance between the first component and the second component along the preset direction is too close due to manufacturing errors and / or assembly errors in the first component and / or the second component, when the ball head of the ball head is assembled into the positioning cavity of the elastic bushing, the ball head will be subjected to a force along the preset direction, thereby causing the ball head to be further squeezed into the first compensation space. In this way, the problem of poor assembly effect caused by the first component and / or the second component being lifted by the ball head assembly due to the distance between the first component and the second component along the preset direction can be improved.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a schematic diagram of the structure of the ball joint assembly, the first component, and the second component according to an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the elastic bushing shown in the figure; Figure 3 This is a schematic diagram of the ball head pin assembly according to another embodiment of the present invention.

[0019] Icon labels: 100. Ball head pin assembly; 110. Ball head pin; 111. First end; 112. Second end; 113. Ball head; 114. Connecting post; 1131. First part; 1132. Second part; 120. Elastic bushing; 121. Positioning cavity; 1211. First chamber; 1212. Second chamber; 122. First compensation space; 123. Second compensation space; 124. Opening; 200, First component; 210, Assembly hole; 300. Second component. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figure 1 As shown, the ball joint assembly 100 provided in one embodiment of this utility model can be applied to vehicles, wherein the vehicle can be a private car, such as a sedan, SUV, MPV or pickup truck; the vehicle can also be a commercial vehicle, such as a minivan; the vehicle can be a gasoline vehicle or a new energy vehicle, and when the vehicle is a new energy vehicle, it can be a hybrid vehicle or a pure electric vehicle.

[0024] The ball joint assembly 100 includes a ball joint 110 and a flexible bushing 120.

[0025] The ball head pin 110 has a first end 111 and a second end 112 arranged along the axial direction of the ball head pin 110 and disposed opposite to each other, wherein the second end 112 of the ball head pin 110 has a ball head 113.

[0026] Specifically, the ball head pin 110 includes a connecting post 114 and a ball head 113 connected to the end of the connecting post 114. The axial direction of the ball head pin 110 is the same as the axial direction of the connecting post 114. The end of the connecting post 114 away from the ball head 113 is the first end 111 of the ball head pin 110, and the end of the ball head pin 110 with the ball head 113 is the second end 112 of the ball head pin 110.

[0027] Combination Figure 1 As shown in Figure 2, the elastic bushing 120 has a positioning cavity 121, and the ball head 113 is assembled in the positioning cavity 121.

[0028] Specifically, the elastic bushing 120 is made of an elastic material, such as rubber or silicone, which can deform under stress. Rubber and silicone materials have good elastic deformation capacity and resilience; when subjected to external pressure, they can undergo elastic deformation and return to their original shape after the external force is removed. For example, the elastic bushing 120 is a one-piece molded structure. This one-piece structure reduces assembly steps and assembly errors caused by splicing multiple parts. It also improves the structural integrity and sealing of the elastic bushing 120, effectively preventing dust, moisture, and other impurities from entering the positioning cavity 121 and avoiding jamming or wear between the ball head 113 and the cavity wall of the positioning cavity 121. The elastic bushing 120 also has an opening 124 communicating with the positioning cavity 121. The ball head 113 can be assembled into the positioning cavity 121 through the opening 124. The opening 124 provides a convenient channel for the assembly of the ball head 113, and the design of the size of the opening 124 to match the ball head 113 (ensuring that the ball head 113 can be smoothly installed and that initial positioning can be achieved through the contraction of the elastic material after assembly) makes the assembly process free of complicated tools, improving assembly efficiency. It should be noted that after the ball head 113 is assembled into the positioning cavity 121, at least a portion of the connecting post 114 is exposed in the elastic bushing 120 for connection with other components. At the same time, the length of the exposed connecting post 114 can be designed according to actual assembly requirements, further improving the adaptability of the assembly.

[0029] Furthermore, along the axial direction of the ball head pin 110, a first compensation space 122 is formed between the ball head 113 and the cavity wall of the positioning cavity 121. Specifically, the first compensation space 122 is located on the side of the ball head 113 away from the first end 111 of the ball head pin 110. At least a portion of the first compensation space 122 can be engaged by the ball head 113 when the ball head pin 110 moves relative to the elastic bushing 120 in a predetermined direction, wherein the predetermined direction is from the first end 111 of the ball head pin 110 to the second end 112.

[0030] When the ball joint assembly 100 of this utility model is applied to a vehicle, it is used to connect a first component 200 and a second component 300, wherein the first component 200 and the second component 300 are arranged sequentially and at intervals along a predetermined direction. Specifically, the ball joint 110 is used to connect the first component 200, and the elastic bushing 120 is used to connect the second component 300. By connecting the ball joint 110 and the elastic bushing 120, the connection between the first component 200 and the second component 300 can be realized. More specifically, the first component 200 has a mounting hole 210 on the side near the second component 300. The connecting post 114 passes through the mounting hole 210 to realize the connection between the ball joint 110 and the first component 200. The second component 300 is fixedly sleeved on the elastic bushing 120, thereby realizing the connection between the second component 300 and the elastic bushing 120. By assembling the ball head 113 of the ball joint 110 into the positioning cavity 121 of the elastic bushing 120, the connection between the first component 200 and the second component 300 can be realized. For example, the connecting post 114 can be a threaded post, the assembly hole 210 can be a threaded hole, and the connecting post 114 is threadedly connected to the assembly hole 210.

[0031] It is understandable that when the distance between the first component 200 and the second component 300 along the preset direction is the standard design distance, when the first component 200 and the second component 300 are connected by the ball head pin assembly 100, a first compensation space 122 is formed between the ball head 113 and the cavity wall of the positioning cavity 121. If the distance between the first component 200 and the second component 300 along the preset direction is too close due to manufacturing errors and / or assembly errors in the first component 200 and / or the second component 300, when the ball head 113 of the ball head pin 110 is assembled into the positioning cavity 121 of the elastic bushing 120, the ball head pin 110 will be subjected to a force along the preset direction, thereby causing the ball head 113 to be further squeezed into the first compensation space 122. In this way, the problem of poor assembly effect caused by the first component 200 and / or the second component 300 being lifted by the ball head pin assembly 100 due to the distance between the first component 200 and the second component 300 along the preset direction being too close can be improved.

[0032] In other words, during the manufacturing and assembly of vehicle components, manufacturing errors (such as dimensional deviations and shape tolerances) and assembly errors (such as installation position offsets) are inevitable between the first component 200 and the second component 300. These errors may cause the actual distance between them along the preset direction to be less than the standard design distance. Without the first compensation space 122, when the ball joint assembly 100 connects the first component 200 and the second component 300, a pushing force will be generated due to the close proximity of the first component 200 and the second component 300. This will cause the first component 200 and / or the second component 300 to be lifted, resulting in problems such as excessive assembly gap, weak connection, and component deformation under stress, which seriously affects the assembly effect and vehicle driving stability. The design of the first compensation space 122 precisely solves this core pain point: when the distance between the first component 200 and the second component 300 along the preset direction is the standard design distance, the ball head 113 fits against the cavity wall of the positioning cavity 121, and the first compensation space 122 is in a reserved state, ensuring a tight connection between the ball head pin 110 and the elastic bushing 120; when the distance between the first component 200 and the second component 300 along the preset direction is too close, the ball head 113 is squeezed into the first compensation space 122, at which point the first compensation space 122 is transformed into the displacement space of the ball head 113, absorbing the assembly contradiction caused by the distance deviation. In this process, the first compensation space 122 enables adaptive adjustment of manufacturing and assembly errors of the first component 200 and / or the second component 300. On the one hand, it improves the assembly success rate, eliminating the need for rework and grinding of components with minor errors, thus reducing assembly costs and time. On the other hand, it ensures assembly accuracy, preventing loosening of the connection caused by the lifting of the first component 200 and / or the second component 300, ensuring the relative positional stability of the first component 200 and the second component 300, thereby improving the operational reliability of vehicle-related systems. Furthermore, it can protect the ball joint assembly 100, the first component 200, and / or the second component 300 from damage. Specifically, by replacing hard contact compression with the first compensation space 122, it avoids plastic deformation or cracks caused by excessive force on various components, extending the service life of the entire vehicle components.

[0033] Combination Figure 1 and Figure 2 In some embodiments, the positioning cavity 121 includes a first chamber 1211 and a second chamber 1212 communicating with the first chamber 1211, the first chamber 1211 and the second chamber 1212 being arranged sequentially along a predetermined direction. At least a portion of the ball head 113 is fitted into the first chamber 1211 and conforms to the cavity wall of the first chamber 1211, and at least a portion of the space in the second chamber 1212 is configured as a first compensation space 122.

[0034] Specifically, the opening 124 is located on the side of the first chamber 1211 away from the second chamber 1212. The ball head 113 can be assembled into the first chamber 1211 through the opening 124, and the ball head 113 can be squeezed into the second chamber 1212 by the ball head pin 110 under the force in a preset direction.

[0035] It should be noted that when the distance between the first component 200 and the second component 300 along the preset direction is the standard design distance, when the first component 200 and the second component 300 are connected by means of the ball head pin assembly 100, at least part of the ball head 113 is assembled in the first chamber 1211 and fits against the cavity wall of the first chamber 1211. At this time, the cavity wall of the first chamber 1211 limits the ball head 113, so that the ball head pin 110 is tightly connected with the elastic bushing 120. At this time, at least part of the space inside the second chamber 1212 is not occupied by the ball head 113, and this part of the space not occupied by the ball head 113 and located on the side of the ball head 113 away from the opening 124 can be used as the first compensation space 122. If the first component 200 and / or the second component 300 are too close together in a preset direction due to manufacturing and / or assembly errors, when the ball head 113 of the ball head pin 110 is assembled into the positioning cavity 121 of the elastic bushing 120, the ball head pin 110 will be subjected to a force in the preset direction, causing the ball head 113 to move further toward the second cavity 1212. This improves the problem of poor assembly caused by the first component 200 and the second component 300 being lifted by the ball head pin assembly 100 due to the first component 200 and the second component 300 being too close together in the preset direction. If the distance between the first component 200 and the second component 300 along the preset direction reaches the closest value allowed by the design error due to manufacturing errors and / or assembly errors in the first component 200 and / or the second component 300, the ball head pin 110 will be squeezed into the second chamber 1212 and fit against the cavity wall of the second chamber 1212. At this time, the cavity wall of the second chamber 1212 limits the ball head 113, so that the ball head pin 110 is tightly connected to the elastic bushing 120.

[0036] Understandably, the core function of the first chamber 1211 is to provide "initial positioning." When its chamber wall is in contact with the ball head 113, it forms the first layer of restraint, ensuring that the connection between the ball head pin 110 and the elastic bushing 120 is tight and without loosening when the distance between the first component 200 and the second component 300 along the preset direction is the standard design distance. The core function of the second chamber 1212 is to provide "error compensation and limit restraint." When the distance between the first component 200 and the second component 300 along the preset direction reaches the closest value allowed by the design error, the ball head 113 fully enters the second chamber 1212 and is in contact with the chamber wall, forming the second layer of restraint, preventing connection failure caused by excessive displacement of the ball head 113. In this way, the ball head pin assembly 100 can maintain a stable connection under both "standard assembly" and "limit error assembly" extreme scenarios, reducing the risk of loosening of the ball head 113 and improving structural reliability. In addition, the first chamber 1211 and the second chamber 1212 are connected, so that the displacement of the ball head 113 is continuous and controllable. When the distance between the first component 200 and the second component 300 along the preset direction is between the standard value and the closest limit value, the ball head 113 will partially enter the second chamber 1212, and the depth of entry is positively correlated with the distance deviation between the first component 200 and the second component 300, thus realizing linear adjustment of error compensation.

[0037] Furthermore, the wall of the first chamber 1211 is a first spherical surface, and the wall of the second chamber 1212 is a second spherical surface.

[0038] Specifically, the wall of the first chamber 1211 is not a complete sphere, but a part of a complete sphere, forming a ring structure. One end of the first chamber 1211 faces the opening 124, and the other end faces the second chamber 1212. Along the preset direction, the cross-sectional area of ​​the first chamber 1211 perpendicular to the preset direction first increases and then decreases. In other words, the area of ​​the cross-section of the first chamber 1211 perpendicular to the preset direction first increases and then decreases along the preset direction. Thus, when the distance between the first component 200 and the second component 300 along the preset direction is the standard design distance, when the first component 200 and the second component 300 are connected by means of the ball head pin assembly 100, the wall of the first chamber 1211 forms a wrapping and limiting effect on the ball head 113, so that the ball head pin 110 is tightly connected to the elastic bushing 120. Furthermore, the second chamber 1212 is not a complete sphere, but a part of a complete sphere, with a bowl-shaped structure. The open end of the second chamber 1212 faces the first chamber 1211. Along the preset direction, the cross-sectional area of ​​the second chamber 1212 perpendicular to the preset direction first increases and then decreases. In other words, the area of ​​the cross-section of the second chamber 1212 perpendicular to the preset direction first increases and then decreases along the preset direction. If the first component 200 and / or the second component 300 have manufacturing errors and / or assembly errors, causing the distance between the first component 200 and the second component 300 along the preset direction to reach the closest value allowed by the design error, when the first component 200 and the second component 300 are connected by the ball head pin assembly 100, the cavity wall of the second chamber 1212 forms a wrapping and limiting effect on the ball head 113, so that the ball head pin 110 is tightly connected to the elastic bushing 120.

[0039] Furthermore, the diameters of the first sphere, the second sphere, and the ball head 113 are the same. It should be noted that the diameters of the first sphere, the second sphere, and the ball head 113 can also have a certain degree of error. For example, the diameter of the first sphere is D1, the diameter of the second sphere is D2, and the diameter of the ball head 113 is D3. The following conditions must be met: -0.2mm ≤ (D3 - D2) ≤ 0.2mm, and / or -0.2mm ≤ (D3 - D1) ≤ 0.2mm. Wherein, the value of (D3 - D2) can be, but is not limited to, -0.2mm, -0.1mm, 0, 0.1mm, and 0.2mm, and the value of (D3 - D1) can be, but is not limited to, -0.2mm, -0.1mm, 0, 0.1mm, and 0.2mm.

[0040] It is understandable that the design standard values ​​for the diameters of the first spherical surface, the second spherical surface, and the ball head 113 are the same. In reality, there can be an error of -0.2mm to 0.2mm. Within this error range, the ball head 113 can still fit against the cavity wall of the first chamber 1211 when it is assembled, ensuring the positioning effect of both. It can also fit against the cavity wall of the second chamber 1212 after the ball head 113 is squeezed into it, ensuring the positioning effect of both.

[0041] Furthermore, a plane perpendicular to a preset direction is defined as a reference plane. The projection of the ball head 113 onto the reference plane covers the projection of the mating position of the first chamber 1211 and the second chamber 1212 onto the reference plane. Thus, if manufacturing and / or assembly errors exist in the first component 200 and / or the second component 300, causing the distance between the first component 200 and the second component 300 along the preset direction to be between the design standard value and the closest value allowed by the design error, the ball head 113 will be locked at the mating position of the first chamber 1211 and the second chamber 1212. This limits the movement of the ball head 113, ensuring a tight connection between the ball head pin 110 and the elastic bushing 120. This prevents the ball head 113 from moving back and forth within the chamber due to bumps and vibrations during vehicle operation, reducing noise generation and ensuring connection stability. This auxiliary limiting function requires no additional limiting structure and can be achieved through the chamber shape design, simplifying the structure and reducing manufacturing costs.

[0042] Specifically, along a preset direction, the cross-sectional area of ​​the first chamber 1211 perpendicular to the preset direction first increases and then decreases. Furthermore, along the preset direction, the cross-sectional area of ​​the second chamber 1212 perpendicular to the preset direction also first increases and then decreases. Thus, the width at the point where the first chamber 1211 and the second chamber 1212 meet is smaller than the diameter of the first spherical surface and the diameter of the second spherical surface, and also smaller than the diameter of the ball head 113.

[0043] Furthermore, the line connecting the center of the first chamber 1211 and the center of the second chamber 1212 is coaxial with the axis of the ball head pin 110. This ensures that the movement trajectory of the ball head 113 from the first chamber 1211 into the second chamber 1212 is a straight line along the axis, avoiding problems such as one-sided force on the cavity wall and jamming caused by the tilting of the ball head 113. This ensures the smoothness of the error compensation process and reduces the risk of deformation of the elastic bushing 120 and the ball head pin 110 due to tilting force, further extending the service life of the assembly.

[0044] The distance between the center of the first chamber 1211 and the center of the second chamber 1212 is in the range of 1.4mm-1.8mm. For example, the distance between the center of the first chamber 1211 and the center of the second chamber 1212 may be, but is not limited to, 1.4mm, 1.5mm, 1.6mm, 1.7mm, or 1.8mm.

[0045] It should be noted that in the field of vehicle manufacturing, the assembly error between the first component 200 and the second component 300 along the preset direction is usually controlled within the range of 0.8mm-1.5mm. When the actual error between the first component 200 and the second component 300 is 0.8mm-1.5mm, the distance that the ball head 113 moves from the center of the first chamber 1211 to the center of the second chamber 1212 (i.e., part of the center distance) can completely absorb the error. For example, if the center distance is 1.6mm, even if the error reaches 1.5mm, the ball head 113 still has a 0.1mm movement margin to avoid assembly jamming caused by the error exceeding the compensation capacity. The lower limit of 1.4mm can cover the minimum typical error (0.8mm) and at the same time reserve space for the elastic deformation of the elastic bushing 120 (the elastic material needs a deformation margin of 0.3mm-0.5mm when extruded to avoid stress concentration caused by insufficient deformation). The upper limit of 1.8mm avoids excessive compensation space. If the center distance exceeds 2mm, the ball head 113 will be too far away from the second chamber 1212 in the standard assembly state. During vehicle operation, the ball head 113 is prone to surging in the chamber, causing abnormal noise or wear.

[0046] like Figure 1 As shown, in some embodiments, the side of the ball head 113 away from the first end 111 of the ball head pin 110 is a planar structure, and the side of the positioning cavity 121 opposite to the planar structure in a preset direction is an arc-shaped structure, with the concave direction of the arc-shaped structure facing away from the planar structure. Thus, when the distance between the first component 200 and the second component 300 along the preset direction is the standard design distance, when the first component 200 and the second component 300 are connected by the ball head pin assembly 100, a first compensation space 122 will be formed between the planar structure of the ball head 113 and the arc-shaped structure of the positioning cavity 121.

[0047] like Figure 3 As shown, in some embodiments, a second compensation space 123 is also formed between the ball head 113 and the cavity wall of the positioning cavity 121; the second compensation space 123 can be embedded by the ball head 113 when the ball head pin 110 moves relative to the elastic bushing 120 in a direction different from the axial direction of the ball head pin 110.

[0048] It is understandable that the first component 200 and the second component 300 may also have assembly errors and / or manufacturing errors in directions at an angle to the preset direction. By leaving a second compensation space 123 between the ball head 113 and the cavity wall of the positioning cavity 121, these errors can be compensated, thereby further improving the assembly effect. In addition, when the first component 200 and the second component 300 have non-axial errors (such as relative tilting), the ball head 113 can make a small lateral or oblique displacement within the second compensation space 123 to adjust its posture to adapt to the relative position of the first component 200 and the second component 300, avoiding problems such as the ball head 113 getting stuck with the cavity wall or forced deformation of components caused by non-axial errors. For example, when the second component 300 has a radial offset relative to the first component 200, the ball head 113 can be finely adjusted radially within the second compensation space 123 to ensure that the connecting post 114 and the assembly hole 210 of the first component 200 remain coaxial, avoiding thread damage or loosening of the assembly caused by the tilting of the connecting post 114 under force.

[0049] Furthermore, the ball head 113 includes a first part 1131 and a second part 1132. The first part 1131 and the second part 1132 are arranged along a preset direction. The peripheral sidewall of the first part 1131 fits against the cavity wall of the positioning cavity 121. A first compensation space 122 and a second compensation space 123 are formed between the second part 1132 and the cavity wall of the positioning cavity 121.

[0050] Specifically, the side surface of the second part 1132 is a cone, and the cross-sectional area of ​​the second part 1132 gradually decreases along a preset direction.

[0051] Understandably, the side of the second part 1132 is set as a conical surface. On the one hand, the cross-sectional area of ​​the conical surface gradually decreases along the preset direction, so that the peripheral side wall of the second part 1132 and the cavity wall of the positioning cavity 121 naturally form an annular second compensation space 123, which provides sufficient range of motion for the non-axial displacement of the ball head pin 110 relative to the elastic bushing 120. On the other hand, the conical surface structure has a guiding function. During the assembly of the ball head 113, the conical surface can guide the ball head 113 to smoothly enter the first cavity 1211, reducing the assembly difficulty.

[0052] This utility model also provides a vehicle, which can be a private car, such as a sedan, SUV, MPV or pickup truck; the vehicle can also be a commercial vehicle, such as a minivan; the vehicle can be a gasoline vehicle or a new energy vehicle, and when the vehicle is a new energy vehicle, it can be a hybrid vehicle or a pure electric vehicle.

[0053] The vehicle includes a ball joint assembly 100, a first component 200, and a second component 300 as described in the above embodiments, wherein the first component 200 and the second component 300 are spaced apart along a preset direction; the ball joint 110 is connected to the first component 200, and the elastic bushing 120 is connected to the second component 300.

[0054] Specifically, the first component 200 has a mounting hole 210 on the side near the second component 300. The connecting post 114 passes through the mounting hole 210 to connect the ball head pin 110 to the first component 200. The second component 300 is fixedly sleeved on the elastic bushing 120, thereby connecting the second component 300 to the elastic bushing 120. The connection between the first component 200 and the second component 300 can be achieved by assembling the ball head 113 of the ball head pin 110 into the positioning cavity 121 of the elastic bushing 120. The first component 200 can be a base for a vehicle headlight, and the second component 300 can be a body panel.

[0055] In the aforementioned vehicle, when the distance between the first component 200 and the second component 300 along a preset direction is a standard design distance, and the first component 200 and the second component 300 are connected by the ball joint assembly 100, a first compensation space 122 is formed between the ball head 113 and the cavity wall of the positioning cavity 121. If the first component 200 and / or the second component 300 are too close along the preset direction due to manufacturing errors and / or assembly errors, when the ball head 113 of the ball joint 110 is assembled into the positioning cavity 121 of the elastic bushing 120, the ball joint 110 will be subjected to a force along the preset direction, causing the ball head 113 to be further squeezed into the first compensation space 122. In this way, the problem of poor assembly effect caused by the first component 200 and / or the second component 300 being lifted by the ball joint assembly 100 due to the first component 200 and the second component 300 being too close along the preset direction can be improved.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions 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 one or more embodiments or examples.

[0057] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A ball joint pin assembly, characterized in that, include: A ball-end pin, the ball-end pin having a first end and a second end arranged along the axial direction of the ball-end pin and disposed opposite to each other, the second end having a ball head; An elastic bushing, wherein the elastic bushing has a positioning cavity, and the ball head is assembled into the positioning cavity; Wherein, along the axial direction of the ball head pin, a first compensation space is formed between the ball head and the cavity wall of the positioning cavity; at least a portion of the first compensation space can be embedded by the ball head when the ball head pin moves relative to the elastic bushing in a preset direction, wherein the preset direction is the direction from the first end to the second end.

2. The ball joint assembly according to claim 1, characterized in that, The positioning cavity includes a first chamber and a second chamber communicating with the first chamber, the first chamber and the second chamber being arranged sequentially along the preset direction; at least a portion of the ball head is assembled in the first chamber and fits against the cavity wall of the first chamber, at least a portion of the space of the second chamber is set as the first compensation space, and the ball head can be squeezed into the second chamber and fit against the cavity wall of the second chamber; Wherein, a plane perpendicular to the preset direction is defined as a reference plane, and the projection of the ball head on the reference plane covers the projection of the docking position of the first chamber and the second chamber on the reference plane.

3. The ball joint assembly according to claim 2, characterized in that, Along the preset direction, the cross-sectional area of ​​the first chamber perpendicular to the preset direction first increases and then decreases; and / or, along the preset direction, the cross-sectional area of ​​the second chamber perpendicular to the preset direction also first increases and then decreases.

4. The ball joint assembly according to claim 2, characterized in that, The wall of the first chamber is a first spherical surface, and the wall of the second chamber is a second spherical surface; The diameters of the first spherical surface, the second spherical surface, and the head of the ball are the same.

5. The ball joint assembly according to claim 2, characterized in that, The line connecting the center of the first chamber and the center of the second chamber is coaxial with the axis of the ball head pin, and the distance between the center of the first chamber and the center of the second chamber is in the range of 1.4mm-1.8mm.

6. The ball joint assembly according to claim 1, characterized in that, The side of the ball head away from the first end is a planar structure, and the positioning cavity and the planar structure on the side opposite to the preset direction are arc-shaped structures, with the concave direction of the arc-shaped structure facing away from the planar structure. The planar structure and the arc-shaped structure form the first compensation space.

7. The ball joint assembly according to claim 1, characterized in that, A second compensation space is also formed between the ball head and the cavity wall of the positioning cavity. The second compensation space can be embedded by the ball head when the ball head pin moves relative to the elastic bushing in a direction different from the axial direction of the ball head pin.

8. The ball joint assembly according to claim 7, characterized in that, The ball head includes a first part and a second part, the first part and the second part are arranged along the preset direction, the peripheral sidewall of the first part is in contact with the cavity wall of the positioning cavity, and the second part and the cavity wall of the positioning cavity form a first compensation space and a second compensation space.

9. The ball joint assembly according to claim 8, characterized in that, The cross-sectional area of ​​the second part gradually decreases along the preset direction, wherein the cross-section of the second part is perpendicular to the preset direction.

10. A vehicle, characterized in that, include: The ball head pin assembly according to any one of claims 1 to 9; First component; The second component is provided in a sequence along the preset direction and spaced apart from each other. The ball head pin is connected to the first component, and the elastic bushing is connected to the second component.

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