Bushing assembly

Abstract

The utility model provides a lining assembly, and belongs to the technical field of automobile parts. The problem that the service life of an existing lining assembly is shortened is solved. The lining assembly comprises an inner sleeve, an outer sleeve arranged on the outer side of the inner sleeve in a sleeving mode and a rubber sleeve fixed between the inner sleeve and the outer sleeve, annular buffering grooves are formed in the end faces of the two ends of the rubber sleeve, and an annular deformation groove is formed in the bottom face of each buffering groove. The bottom face of each deformation groove is provided with a first arc face which is concave in the direction opposite to the groove opening direction of the deformation groove, and the outer side face of each deformation groove is provided with a second arc face which protrudes in the direction facing the groove opening direction of the deformation groove. The service life of the bushing assembly can be prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile accessories and relates to a bushing assembly. Background Art

[0002] Suspension is the general term for the force transmission connection device between the wheels and the body of a car, including elastic elements, shock absorbers and force transmission devices, which play the role of buffering, vibration reduction and force transmission respectively. The force transmission device includes control arms, tie rods and stabilizer bars, etc. Ball head assemblies and bushing assemblies are used on control arms, tie rods and stabilizer bars for connection.

[0003] Chinese patent literature publicly proposes a rubber sleeve assembly for a control arm [application number: CN201720078952.4; announcement number: CN206419389U], including a sleeve body, a shock-absorbing sleeve, a buffer sleeve and a connecting sleeve connected in sequence from the inside to the outside, the sleeve body is provided with a buffer protrusion, the shock-absorbing sleeve is provided with a connecting groove matched with the buffer protrusion, and buffer grooves are provided on both ends of the shock-absorbing sleeve, and the bottom surface of the buffer groove is a plane.

[0004] The rubber sleeve assembly is the bushing assembly, and the connecting sleeve is fixed on the control arm. When the car vibrates, the connecting sleeve and the sleeve body in the bushing assembly will have relative axial displacement, radial displacement or axial-radial composite displacement, and the bottom surface of the buffer groove of the shock-absorbing sleeve will be greatly deformed. Since the bottom surface of the buffer groove is a plane, the elastic deformation here is limited, which can easily cause the shock-absorbing sleeve to crack and break at the bottom surface of the buffer groove, thereby reducing the service life of the bushing assembly. Utility Model Content

[0005] The utility model aims to solve the above problems in the prior art and proposes a bushing assembly, and the technical problem solved is how to increase the service life of the bushing assembly.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A bushing assembly comprises an inner sleeve, an outer sleeve arranged on the outer side of the inner sleeve and a rubber sleeve fixed between the inner sleeve and the outer sleeve, wherein the end surfaces of both ends of the rubber sleeve are provided with annular buffer grooves, and the bushing assembly comprises an inner sleeve, an outer sleeve, an outer sleeve, an outer sleeve, an outer sleeve, an outer sleeve, an outer sleeve, an outer sleeve, an outer sleeve, an outer sleeve, an outer sleeve, an outer sleeve, an inner ...

[0008] The setting of the deformation groove increases the surface area of ​​the bottom surface of the buffer groove, and the concave-convex structure composed of the first arc surface and the second arc surface further increases the surface area of ​​the bottom surface of the buffer groove, thereby increasing the elastic deformation of the end surface of the rubber sleeve, so that the end surface of the rubber sleeve can adapt to greater deformation; at the same time, the arc structure of the first arc surface and the second arc surface can improve the structural strength and improve the stress concentration, thereby reducing the possibility of rupture and damage to the end surface of the rubber sleeve. Therefore, the bushing assembly can increase the service life.

[0009] In the above bushing assembly, in the same deformation groove, the first arc surface and the second arc surface have a smooth transition, which can improve the stress concentration at the connection between the first arc surface and the second arc surface, thereby reducing the possibility of cracking and damage on the end surface of the rubber sleeve, thereby increasing the service life of the bushing assembly.

[0010] In the above bushing assembly, the inner side surface of each deformation groove is provided with an inclined surface inclined toward the inner sleeve along the direction from the bottom surface of the deformation groove to the notch of the deformation groove. The provision of the inclined surface can increase the radial width of the notch of the deformation groove, so that the deformation groove provides more deformation volume, reduce the possibility of the two sides of the deformation groove abutting against each other and being squeezed when the rubber sleeve is deformed, reduce the possibility of the rubber sleeve being broken due to excessive squeezing, and help to increase the service life of the bushing assembly.

[0011] In the above bushing assembly, an arc transition surface is provided between the outer side surface of the buffer groove and the bottom surface of the buffer groove, and the arc transition surface is located on the outer circumference of the deformation groove. The provision of the arc transition surface can improve the stress concentration between the outer side surface of the buffer groove and the bottom surface of the buffer groove, avoid cracking at the position of the arc transition surface, and help to ensure the service life of the bushing assembly.

[0012] In the above-mentioned bushing assembly, the inner sleeve includes a raised section in the middle and straight sections at both ends, the two straight sections extend out of the outer sleeve, and the inner edges of the end surfaces at both ends of the rubber sleeve are provided with protruding connecting rings, the two connecting rings are respectively abutted against and fixed to the outer side surfaces of the two straight sections, and at least one connecting ring has a protruding convex ring on its outer side surface. The convex ring can improve the structural strength of the rubber sleeve connecting ring and increase the service life of the rubber sleeve connecting ring.

[0013] In the above bushing assembly, each connecting ring is provided with a protruding bump on the outer side, and the two bumps are located in opposite positions in the circumferential direction of the rubber sleeve. The bump can improve the local structural strength of the convex ring, which is conducive to ensuring the service life of the rubber sleeve.

[0014] In the above-mentioned bushing assembly, the inner sleeve has a transition section between the raised section and the straight tube section, the deformation groove is located on the outer peripheral side of the transition section, and the outer side surface of the transition section is a concave arc surface. The outer side surface of the transition section is a concave arc surface, and the inner side surface of the deformation groove is an inclined surface, which can increase the radial thickness of the rubber sleeve outside the transition section, thereby providing more radial deformation to the end surface of the rubber sleeve, so that the end surface of the rubber sleeve can further adapt to greater deformation, further reduce the possibility of rupture and damage to the end surface of the rubber sleeve, and improve the service life of the bushing assembly.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] The arrangement of the deformation groove, the first arc surface and the second arc surface increases the elastic deformation and structural strength of the rubber sleeve end surface, reduces the possibility of cracking and damage of the rubber sleeve end surface, and thus increases the service life of the bushing assembly. The arrangement of the inclined surface, the arc transition surface, the convex ring and the convex block further increases the service life of the bushing assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the bushing assembly.

[0018] Figure 2 It is a cross-sectional view of the bushing assembly.

[0019] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0020] Figure 4 It is a top view of the bushing assembly.

[0021] In the figure, 1, inner sleeve; 1a, raised section; 1b, straight pipe section; 1c, transition section; 2, outer sleeve; 3, rubber sleeve; 3a, buffer groove; 3a1, arc transition surface; 3b, deformation groove; 3b1, first arc surface; 3b2, second arc surface; 3b3, inclined surface; 3c, connecting ring; 3d, convex ring; 3e, bump. DETAILED DESCRIPTION

[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0023] like Figure 1 and Figure 2As shown, a bushing assembly includes an inner sleeve 1, a rubber sleeve 3 and an outer sleeve 2, wherein the inner sleeve 1 is inserted into the outer sleeve 2, and the rubber sleeve 3 is fixedly connected between the inner sleeve 1 and the outer sleeve 2. The inner side surface of the rubber sleeve 3 is abutted against and fixed to the outer side surface of the inner sleeve 1, and the outer side surface of the rubber sleeve 3 is abutted against and fixed to the inner side surface of the outer sleeve 2. The inner sleeve 1 includes a raised section 1a located in the middle and straight pipe sections 1b located at both ends, and the two straight pipe sections 1b both extend out of the outer sleeve 2.

[0024] like Figure 2 and Figure 3 As shown, the rubber sleeve 3 is provided with an annular buffer groove 3a on both end surfaces, the inner side surface of each buffer groove 3a is a conical surface, and the outer side surface of each buffer groove 3a is a cylindrical surface. An annular deformation groove 3b is provided on the bottom surface of each buffer groove 3a, and the bottom surface of each deformation groove 3b is provided with a first arc surface 3b1 that is concave in the direction away from the notch of the deformation groove 3b, and the outer side surface of each deformation groove 3b is provided with a second arc surface 3b2 that is convex in the direction of the notch of the deformation groove 3b. In the same deformation groove 3b, there is a smooth transition between the first arc surface 3b1 and the second arc surface 3b2. The inner side surface of each deformation groove 3b is provided with an inclined surface 3b3 that is inclined toward the inner sleeve 1 along the direction from the bottom surface of the deformation groove 3b to the notch of the deformation groove 3b, and the inclined surface 3b3 is connected to and flush with the inner side surface of the buffer groove 3a. An arc transition surface 3a1 is provided between the outer side surface of the buffer groove 3a and the bottom surface of the buffer groove 3a, and the arc transition surface 3a1 is located on the outer peripheral side of the deformation groove 3b.

[0025] Combination Figure 1 and Figure 4 As shown, the inner edges of the two end faces of the rubber sleeve 3 are provided with protruding connecting rings 3c, and the two connecting rings 3c are respectively abutted against and fixed to the outer side faces of the two straight pipe sections 1b, and the outer side faces of each connecting ring 3c are cylindrical. At least one connecting ring 3c has a protruding convex ring 3d on its outer side face, and the upper connecting ring 3c in the figure is provided with a convex ring 3d, and the two connecting rings 3c can also be provided with convex rings 3d. The outer side face of each connecting ring 3c is provided with a protruding convex block 3e, and the two convex blocks 3e are located in opposite positions in the circumferential direction of the rubber sleeve 3.

[0026] like Figure 2 and Figure 3As shown, the inner sleeve 1 has a transition section 1c between the raised section 1a and the straight pipe section 1b, and the deformation groove 3b is located on the outer peripheral side of the transition section 1c. The outer side surface of the transition section 1c is a concave arc surface, and the inner side surface of the transition section 1c is a convex arc surface. The outer side surface of the raised section 1a and the inner side surface of the raised section 1a are both convex spherical surfaces. The two transition sections 1c are symmetrically arranged, and the axial length of the outer side surface of the raised section 1a is greater than the axial length of the outer side surface of the transition section 1c, and half of the axial length of the outer side surface of the raised section 1a is less than the axial length of the outer side surface of the transition section 1c. In this way, the axial length of the transition section 1c can be appropriately increased, so that the outer side surface of the inner sleeve 1 provides more bonding surfaces with the rubber sleeve 3, so that the rubber sleeve 3 and the inner sleeve 1 are stably bonded.

[0027] The arrangement of the deformation groove 3b increases the surface area of ​​the bottom surface of the buffer groove 3a, and the concave-convex structure composed of the first arc surface 3b1 and the second arc surface 3b2 further increases the surface area of ​​the bottom surface of the buffer groove 3a, thereby increasing the elastic deformation of the end surface of the rubber sleeve 3, so that the end surface of the rubber sleeve 3 can adapt to greater deformation; at the same time, the arc structure of the first arc surface 3b1 and the second arc surface 3b2 can improve the structural strength and improve the stress concentration, thereby reducing the possibility of rupture and damage to the end surface of the rubber sleeve 3. Therefore, the bushing assembly can increase the service life.

[0028] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A bushing assembly, comprising an inner bushing (1), an outer bushing (2) sleeved outside the inner bushing (1), and a rubber bushing (3) fixed between the inner bushing (1) and the outer bushing (2), wherein both end surfaces of the rubber bushing (3) are provided with annular buffer grooves (3a), characterized in that: An annular deformation groove (3b) is provided on the bottom surface of each buffer groove (3a), a first arc surface (3b1) is provided on the bottom surface of each deformation groove (3b) and is concave in the direction away from the groove opening of the deformation groove (3b), and a second arc surface (3b2) is provided on the outer side surface of each deformation groove (3b) and is convex in the direction of the groove opening of the deformation groove (3b).

2. The bushing assembly according to claim 1, characterized in that: In the same deformation groove (3b), there is a smooth transition between the first arc surface (3b1) and the second arc surface (3b2).

3. The bushing assembly according to claim 1, characterized in that: The inner side surface of each deformation groove (3b) is provided with an inclined surface (3b3) which is inclined toward the inner sleeve (1) along a direction from the bottom surface of the deformation groove (3b) to the notch of the deformation groove (3b).

4. The bushing assembly according to claim 1, characterized in that: An arc transition surface (3a1) is provided between the outer side surface of the buffer groove (3a) and the bottom surface of the buffer groove (3a), and the arc transition surface (3a1) is located on the outer peripheral side of the deformation groove (3b).

5. The bushing assembly according to any one of claims 1 to 4, characterized in that: The inner sleeve (1) comprises a raised section (1a) located in the middle and straight pipe sections (1b) located at both ends, the two straight pipe sections (1b) both protrude out of the outer sleeve (2), the inner edges of the end surfaces at both ends of the rubber sleeve (3) are provided with protruding connecting rings (3c), the two connecting rings (3c) are respectively abutted against and fixed to the outer side surfaces of the two straight pipe sections (1b), and at least one connecting ring (3c) has a protruding convex ring (3d) on its outer side surface.

6. The bushing assembly according to claim 5, characterized in that: The outer side surface of each connecting ring (3c) is provided with a protruding lug (3e), and the two lugs (3e) are located at opposite positions in the circumferential direction of the rubber sleeve (3).

7. The bushing assembly according to claim 5, characterized in that: The inner sleeve (1) has a transition section (1c) between the raised section (1a) and the straight tube section (1b), the deformation groove (3b) is located on the outer peripheral side of the transition section (1c), and the outer side surface of the transition section (1c) is an inwardly concave arc surface.

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