Control arm bushing, control arm mounting structure and vehicle

Abstract

The invention relates to the technical field of automobile parts, in particular to a control arm bushing which comprises an outer sleeve and an inner sleeve arranged in the outer sleeve, a rubber part is connected between the outer sleeve and the inner sleeve in a sleeved mode, and the rubber part is provided with at least one damping hole penetrating in the axial direction. The rubber part is provided with a first contact surface and a second contact surface which are oppositely arranged in the damping hole in the radial direction, the first contact surface is provided with a first convex rib, and the second contact surface is provided with a second convex rib; and the orthographic projection of the first convex rib on the second contact surface is intersected with the second convex rib. The invention further discloses a control arm mounting structure and a vehicle. According to the vibration isolation device, deformation can be generated in the vehicle running process, large impact can be buffered, vibration can be effectively attenuated, the vibration isolation effect is improved, meanwhile, the convex ribs are arranged to change existing surface contact into point contact, and therefore abnormal sound is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts, and in particular to a control arm bushing, a control arm mounting structure and a vehicle. Background Art

[0002] The suspension system is an important assembly in modern cars. Its main function is to transmit road force and torque, ensure the normal driving of the vehicle, mitigate large impacts, attenuate vibrations, and control the movement trajectory of the wheels. It has a great impact on the driving smoothness and handling stability of the car. As the main performance part of the suspension system, the control arm bushing has a great impact on the performance of the whole vehicle.

[0003] The improvement of the dynamic stiffness and static stiffness of the existing control arm bushing is affected by the size of the rubber, but the layout space is limited. The vertically arranged bushing rubber is prone to deformation and damage after the increase. For this reason, the bushing usually has holes inside the rubber structure, but the rubber on both sides of the opening position will be squeezed and deformed during operation, and abnormal noise is likely to occur during the contact process. Summary of the invention

[0004] The technical problem to be solved by the present invention is: how to solve the problem of abnormal noise in the existing bushing.

[0005] In order to solve the above technical problems, the present invention provides a control arm bushing, which includes an outer sleeve and an inner sleeve arranged in the outer sleeve.

[0006] A rubber piece is sleeved between the outer sleeve and the inner sleeve, the rubber piece is provided with at least one shock-absorbing hole penetrating in the axial direction, the rubber piece is formed with a first contact surface and a second contact surface arranged opposite to each other in the radial direction in the shock-absorbing hole, the first contact surface is provided with a first convex rib, and the second contact surface is provided with a second convex rib;

[0007] Wherein, the orthographic projection of the first convex rib on the second contact surface intersects with the second convex rib.

[0008] Further preferably, the radial distance between the first contact surface and the second contact surface gradually decreases from the two ends to the middle along the axial direction.

[0009] Further preferably, the first contact surface is an arcuate surface, and the convex surface of the first contact surface faces the second contact surface; and / or

[0010] The second contact surface is an arc-shaped surface, and the convex surface of the second contact surface faces the first contact surface.

[0011] Further preferably, the first contact surface includes a first inclined surface and a second inclined surface intersecting each other;

[0012] The radial distance between the intersection line of the first inclined surface and the second inclined surface and the second contact surface is H1, and the radial distance between the end of the first inclined surface or the second inclined surface away from the intersection line and the second contact surface is H2;

[0013] Among them, H1 and H2 satisfy: H2>H1.

[0014] Further preferably, the intersection line of the first inclined surface and the second inclined surface is located on a vertical plane Q, the vertical plane Q is perpendicular to the radial direction of the rubber member, and the vertical plane Q is parallel to the axis of the rubber member;

[0015] The angles formed by the first inclined surface and the second inclined surface and the vertical surface Q are α;

[0016] Wherein, the angle α satisfies: 1°≤α≤30°.

[0017] Further preferably, the number of the shock absorbing holes is an even number and they are arranged symmetrically with respect to the axial direction of the rubber member.

[0018] Further preferably, the rubber member is an annular structure, a mounting hole is opened in the middle of the rubber member, and the inner sleeve is embedded in the mounting hole.

[0019] In order to solve the above technical problems, the present invention further provides a control arm mounting structure, which is used to be connected to a sub-frame, and includes the above control arm bushing;

[0020] It also includes a mounting bracket and a control arm body, the control arm bushing is arranged on the mounting bracket, the control arm body is connected to the control arm bushing, and the mounting bracket is connected to the subframe.

[0021] Further preferably, the mounting bracket includes a sleeve and an extension arm, the control arm bushing is installed in the sleeve, the extension arm is arranged on the outer wall of the sleeve and extends radially along the bushing, the extension arm is provided with a fixing hole, the extension arm is connected to the subframe through a first fastener, and the first fastener is inserted into the fixing hole.

[0022] Further preferably, the control arm body has a latch, the latch is coaxially matched with the inner sleeve, and the latch and the inner sleeve are locked by a second fastener.

[0023] The present invention also provides a vehicle, comprising a subframe and the control arm mounting structure described above, wherein the mounting bracket is connected to the subframe.

[0024] Compared with the prior art, the control arm bushing, control arm mounting structure and vehicle provided by the present invention have the following beneficial effects:

[0025] The present invention can generate deformation during vehicle driving to buffer large impacts and effectively attenuate vibrations by opening a shock-absorbing hole on the rubber part, thereby improving the vibration isolation effect. At the same time, the rubber part is provided with a first contact surface and a second contact surface arranged opposite to each other in the radial direction in the shock-absorbing hole, and a first convex rib and a second convex rib are arranged on the first contact surface and the second contact surface respectively, and the orthographic projection of the first convex rib on the second contact surface intersects with the second convex rib, so that when the rubber part is deformed by force, the existing surface contact is changed into point contact, thereby avoiding abnormal noise.

[0026] After the control arm body is connected to the control arm bushing, the present invention can transmit the impact and vibration of the control arm body to the rubber part, and absorb energy through deformation of the rubber part. The rubber part can also effectively avoid damage due to extrusion deformation by arranging shock-absorbing holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of a control arm bushing described in Example 1.

[0028] Figure 2 yes Figure 1 Cross-sectional view of section AA.

[0029] Figure 3 This is a schematic diagram of a control arm mounting structure described in Example 2.

[0030] Figure 4 It is a cross-sectional view of the control arm and bushing after assembly described in Example 2.

[0031] Reference numerals:

[0032] 10. control arm bushing; 11. rubber part; 12. shock-absorbing hole; 121. first contact surface; 121a. first convex rib; 121b. first inclined surface; 121c. second inclined surface; 122. second contact surface; 122a. second convex rib; 13. mounting hole; 14. outer sleeve; 15. inner sleeve;

[0033] 20. Mounting bracket; 21. Sleeve; 22. Extension arm; 23. Fixing hole;

[0034] 30. Control arm body; 31. Latch;

[0035] 40. Subframe;

[0036] 50. A first fastener;

[0037] 60. Second fastener. DETAILED DESCRIPTION

[0038] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like used in the present invention to indicate the orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0040] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0043] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0044] Example 1

[0045] like Figure 1 and Figure 2 As shown, this embodiment provides a control arm bushing. The control arm bushing 10 includes an outer sleeve 14 and an inner sleeve 15 arranged in the outer sleeve 14 . A rubber member 11 is sleeved between the outer sleeve 14 and the inner sleeve 15 .

[0046] In some embodiments, the rubber member 11 is an annular structure, a mounting hole 13 is opened in the middle of the rubber member 11 , the inner sleeve 13 is coaxially embedded in the mounting hole 13 , and the outer sleeve 14 is coaxially arranged on the outer periphery of the rubber member 11 .

[0047] In a specific embodiment, the rubber member 11 is provided with at least one shock-absorbing hole 12 penetrating along the axial direction. The provision of the shock-absorbing hole 12 enables the rubber member 11 to deform rapidly during vehicle driving to mitigate large impacts and effectively attenuate vibrations, thereby improving the vibration isolation effect.

[0048] In some embodiments, after the shock-absorbing hole 12 is provided, in order to avoid abnormal noise caused by the contact surface in the hole being squeezed, the rubber member 11 is formed with a first contact surface 121 and a second contact surface 122 arranged opposite to each other in the radial direction in the shock-absorbing hole 12, the first contact surface 121 is provided with a first convex rib 121a, and the second contact surface 122 is provided with a second convex rib 122a; wherein the orthographic projection of the first convex rib 121a on the second contact surface 122 intersects with the second convex rib 122a. In this way, when the rubber member 11 is deformed by force, the existing surface contact is changed into point contact, thereby avoiding abnormal noise.

[0049] In some embodiments, in order to further avoid abnormal noise, the radial distance between the first contact surface 121 and the second contact surface 122 is gradually reduced from the two ends to the middle along the axial direction; thus, when the rubber part 11 is squeezed and deformed, the first contact surface 121 and the second contact surface 122 can be changed from line-surface contact to surface-surface contact, which can effectively avoid the friction abnormal noise caused by direct contact between surfaces.

[0050] In some embodiments, the first contact surface 121 is an arcuate surface, and the convex surface of the first contact surface 121 faces the second contact surface 122. When the rubber member 11 is squeezed and deformed, the second contact surface 122 moves radially toward the first contact surface 121 and contacts the first contact surface 121. Since the first contact surface 121 is an arcuate surface, the first contact surface 121 and the second contact surface 122 are in line-surface contact at this time. When the rubber member 11 continues to be pressurized, the first contact surface 121 and the second contact surface 122 are gradually transformed from line-surface contact to surface-surface contact, which cushions large impacts and effectively attenuates vibrations, thereby improving the vibration isolation effect. In addition, since both the first contact surface 121 and the second contact surface 122 are provided with convex ribs, direct contact between surfaces and friction noise can be effectively avoided.

[0051] In some embodiments, similarly, the second contact surface 122 can also be an arc-shaped surface, and the convex surface of the second contact surface 122 faces the first contact surface 121. Its function is that when the rubber part 11 is under pressure, the first contact surface 121 and the second contact surface 122 gradually transform from line-surface contact to surface-surface contact, which can cushion large impacts and effectively attenuate vibrations, improve vibration isolation effects, and effectively avoid friction noises caused by direct surface contact.

[0052] In some embodiments, the first contact surface 121 includes an intersecting first bevel 121b and a second bevel 121c; the radial spacing between the intersection line of the first bevel 121b and the second bevel 121c and the second contact surface 122 is H1, and the radial spacing between the end of the first bevel 121b or the second bevel 121c away from the intersection line and the second contact surface 122 is H2; wherein H1 and H2 satisfy: H2>H1; thus, in the radial direction, the middle part of the first contact surface 121 protrudes toward the second contact surface 122, and when the rubber member 11 is compressed, the second contact surface 122 first contacts the intersection line of the first bevel 121b and the second bevel 121c, i.e., line-surface contact, and when the rubber member 11 continues to be compressed, the first contact surface 121 and the second contact surface 122 gradually change from line-surface contact to surface-surface contact, thereby buffering large impacts and effectively attenuating vibrations, improving the vibration isolation effect, and effectively avoiding friction noise caused by direct contact between surfaces.

[0053] In some embodiments, the intersection line of the first inclined surface 121b and the second inclined surface 121c is located on a vertical plane Q, the vertical plane Q is perpendicular to the radial direction of the rubber member 11, and the vertical plane Q is parallel to the axis of the rubber member 11; the angles formed by the first inclined surface 121b and the second inclined surface 121c and the vertical plane Q are α respectively; thereby ensuring that the first contact surface 121 and the second contact surface 122 are in line-surface contact when in contact, avoiding direct contact between surfaces and generating friction noise.

[0054] In some embodiments, the angle α satisfies: 1°≤α≤30°.

[0055] In some embodiments, the angle α is preferably 2°-10°, so as to avoid the space occupied by the first contact surface 121 in the radial direction, thereby preventing the thickness of the rubber member 11 from increasing and occupying volume.

[0056] In other embodiments, the second contact surface 122 may also adopt the inclined surface design of the first contact surface 121 to achieve the effect of vibration isolation and avoiding abnormal noise.

[0057] In some embodiments, the number of shock-absorbing holes 12 is an even number, such as 2, 4 or 6, and the even number of shock-absorbing holes 12 are arranged axially symmetrically with respect to the rubber member 11, thereby improving the dynamic stiffness, damping ratio and amplification factor of the bushing, and achieving the mitigation of large impacts in different directions and effective attenuation of vibrations.

[0058] In other embodiments, the number of the shock absorbing holes 12 may also be an odd number greater than 1, and the odd number of shock absorbing holes 12 are arranged on the rubber member 11 at equal angles. For example, when there are 3 shock absorbing holes 12, the angles formed by two adjacent shock absorbing holes 12 relative to the axis are 120°, and so on. This can also achieve the effect of buffering large impacts and effectively attenuating vibrations.

[0059] Example 2

[0060] like Figure 3 and Figure 4 As shown, this embodiment provides a control arm mounting structure for connecting to a subframe 40, including the control arm bushing 10 of Embodiment 1; it also includes a mounting bracket 20 and a control arm body 30, the control arm bushing 10 is arranged on the mounting bracket 20, the control arm body 30 is connected to the control arm bushing 10, and the mounting bracket 20 is connected to the subframe 40.

[0061] In a specific embodiment, the subframe 40 is composed of a longitudinal beam extending in the longitudinal direction and a transverse beam extending in the transverse direction, the mounting bracket 20 is mounted on the side of the longitudinal beam, and the axial direction of the control arm bushing 10 extends in the longitudinal direction, so that a larger rubber member 11 can be arranged in a limited space, further improving the vibration isolation rate. It should be noted that the term "longitudinal" is parallel to the axial direction of the control arm bushing 10.

[0062] In some embodiments, the mounting bracket 20 includes a sleeve 21 and an extension arm 22, the control arm bushing 10 is installed in the sleeve 21, the extension arm 22 is arranged on the outer wall of the sleeve 21 and extends radially along the sleeve 21, the extension arm 22 is provided with a fixing hole 23, the extension arm 22 is connected to the subframe 40 through a first fastener 50, and the first fastener 50 is inserted into the fixing hole 23; specifically, the extension arms 22 are two and symmetrically arranged on the outer wall of the sleeve 21, so as to form a "U"-shaped mounting bracket 20, so as to facilitate the matching of the mounting bracket 20 with the longitudinal beam, and then the first fastener 50 is inserted into the fixing hole 23 and the control arm mounting hole on the longitudinal beam to realize the connection and locking between the extension arm 22 and the longitudinal beam, thereby improving the dynamic stiffness of the control arm bushing 10, and the installation is simple and convenient.

[0063] In some embodiments, there are two first fasteners 50 , which can enhance the dynamic rigidity and strength of the connection boundary between the mounting bracket 20 and the sub-frame 40 .

[0064] In some embodiments, the control arm body 30 has a pin 31, which is coaxially connected to the inner sleeve 15, and the pin 31 and the inner sleeve 15 are locked by a second fastener 60, thereby achieving the assembly of the control arm bushing 10 and the control arm body 30, reducing the difficulty of assembly and improving the efficiency of assembly.

[0065] In some embodiments, the first fastener 50 and the second fastener 60 are bolt assemblies.

[0066] Example 3

[0067] This embodiment provides a vehicle, including a subframe 40 and the control arm mounting structure of embodiment 2, wherein the mounting bracket 20 is connected to the subframe 40; specifically, a mounting hole is provided on the subframe 40, and after the fixing hole 23 on the mounting bracket 20 corresponds to the mounting hole, the first fastener 50 is passed through and locked.

[0068] In summary, the present invention can generate deformation during vehicle driving by opening a shock-absorbing hole 12 on the rubber member 11, thereby buffering large impacts and effectively attenuating vibrations, thereby improving the vibration isolation effect. At the same time, a first contact surface 121 and a second contact surface 122 arranged radially opposite to each other are formed in the shock-absorbing hole 12 of the rubber member 11, and a first convex rib 121a and a second convex rib 122a are arranged on the first contact surface 121 and the second contact surface 122, respectively, and the orthographic projection of the first convex rib 121a on the second contact surface 122 intersects with the second convex rib 122a, so that when the rubber member 11 is deformed by force, the existing surface contact is changed into point contact, thereby avoiding abnormal noise; and the first contact surface 121 or the second contact surface 122 is designed as an arc surface or an inclined surface, so that the first contact surface 121 and the second contact surface 122 are gradually converted from line-surface contact to surface-surface contact when in contact, so that large impacts are buffered and vibrations are effectively attenuated, thereby improving the vibration isolation effect, and effectively avoiding the occurrence of friction abnormal noise caused by direct contact between surfaces.

[0069] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be regarded as the protection scope of the present invention. The basic principles, main features and advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above preferred embodiments. The embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention.

[0070] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A control arm bushing, the control arm bushing (10) comprising an outer sleeve (14) and an inner sleeve (15) arranged inside the outer sleeve (14), characterized in that: A rubber member (11) is sleeved between the outer sleeve (14) and the inner sleeve (15); the rubber member (11) is provided with at least one shock-absorbing hole (12) penetrating in the axial direction; the rubber member (11) is formed with a first contact surface (121) and a second contact surface (122) arranged opposite to each other in the radial direction in the shock-absorbing hole (12); the first contact surface (121) is provided with a first convex rib (121a), and the second contact surface (122) is provided with a second convex rib (122a); Wherein, the orthographic projection of the first convex rib (121a) on the second contact surface (122) intersects with the second convex rib (122a).

2. A control arm bushing according to claim 1, characterized in that: The radial distance between the first contact surface (121) and the second contact surface (122) gradually decreases from the two ends to the middle along the axial direction.

3. A control arm bushing according to claim 1, characterized in that: The first contact surface (121) is an arc-shaped surface, and the convex surface of the first contact surface (121) faces the second contact surface (122); and / or The second contact surface (122) is an arc-shaped surface, and the convex surface of the second contact surface (122) faces the first contact surface (121).

4. A control arm bushing according to claim 1, characterized in that: The first contact surface (121) comprises a first inclined surface (121b) and a second inclined surface (121c) intersecting each other; The radial distance between the intersection line of the first inclined surface (121b) and the second inclined surface (121c) and the second contact surface (122) is H1, and the radial distance between the end of the first inclined surface (121b) or the second inclined surface (121c) away from the intersection line and the second contact surface (122) is H2; Among them, H1 and H2 satisfy: H2>H1.

5. A control arm bushing according to claim 4, characterized in that: The intersection line of the first inclined surface (121b) and the second inclined surface (121c) is located on a vertical plane Q, the vertical plane Q is perpendicular to the radial direction of the rubber component (11), and the vertical plane Q is parallel to the axis of the rubber component (11); The angles formed by the first inclined surface (121b) and the second inclined surface (121c) and the vertical surface Q are α; Wherein, the angle α satisfies: 1°≤α≤30°.

6. A control arm bushing according to claim 1, characterized in that: The number of the shock-absorbing holes (12) is an even number and they are arranged symmetrically with respect to the axial direction of the rubber member (11).

7. A control arm bushing according to claim 1, characterized in that: The rubber member (11) is an annular structure, a mounting hole (13) is provided in the middle of the rubber member (11), and the inner sleeve (13) is embedded in the mounting hole (13).

8. A control arm mounting structure, used for connecting to a subframe (40), characterized in that: A control arm bushing (10) comprising any one of claims 1 to 7; It also includes a mounting bracket (20) and a control arm body (30), the control arm bushing (10) is arranged on the mounting bracket (20), the control arm body (30) is connected to the control arm bushing (10), and the mounting bracket (20) is connected to the subframe (40).

9. A control arm mounting structure according to claim 8, characterized in that: The mounting bracket (20) comprises a sleeve (21) and an extension arm (22), the control arm bushing (10) is mounted in the sleeve (21), the extension arm (22) is arranged on the outer wall of the sleeve (21) and extends radially along the sleeve (21), the extension arm (22) is provided with a fixing hole (23), the extension arm (22) is connected to the subframe (40) via a first fastener (50), and the first fastener (50) is inserted into the fixing hole (23).

10. The control arm mounting structure according to claim 8, characterized in that: The control arm body (30) has a latch (31), the latch (31) is coaxially matched with the inner sleeve (15), and the latch (31) and the inner sleeve (15) are locked by a second fastener (60).

11. A vehicle, comprising a subframe (40) and a control arm mounting structure according to any one of claims 8 to 10, wherein the mounting bracket (20) is connected to the subframe (40).

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