Bushing assembly

Abstract

The application discloses a bush assembly, which comprises a bush inner tube, a bush outer tube, a rubber body, and a limiting piece. The circumferential wall of the bush outer tube is provided with at least one through slot in the middle part in the axial direction. The rubber body is connected between the bush inner tube and the bush outer tube, and the rubber body is provided with an open slot corresponding to the position of the through slot. The limiting piece is detachably installed in the through slot. The limiting piece comprises a first section and a second section. The size of the first section is the same as that of the through slot, and the size of the second section is not greater than that of the first section. The first section is in interference fit with the through slot, the second section extends into the open slot through the through slot, and the second section is in interference fit or clearance fit with the rubber body. The limiting piece and the bush outer tube are detachably connected, a plurality of different limiting pieces and bush outer tubes can be in interference fit, a plurality of schemes can be verified at the same time, the development cost is reduced, and the efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of vehicle component technology, and in particular to a bushing assembly. Background Technology

[0002] As a widely used accessory component on the outside of mechanical parts, bushings mainly undertake functions such as sealing, buffering and wear protection, and their core role is to improve system reliability through the gasket effect.

[0003] In the process of automobile development, with the rapid development of new energy vehicles, the development cycle and cost of automobiles are being compressed, and platformization is becoming more and more common. The assembly boundaries of bushings used in certain structures of some models are basically the same, but the performance requirements are quite different, and the development cycle cannot be too long. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a bushing assembly that is detachably connected to the outer bushing tube via a limiting member. Multiple different limiting members and the outer bushing tube can be used in an interference fit, allowing for the simultaneous verification of multiple solutions, reducing development costs, and improving efficiency.

[0005] According to an embodiment of the present invention, a bushing assembly includes: an inner bushing tube; an outer bushing tube, wherein at least one through groove is formed in the axially upward center of the peripheral wall of the outer bushing tube; a rubber body, the rubber body being connected between the inner bushing tube and the outer bushing tube, the rubber body having an opening groove corresponding to the position of the through groove; and a limiting member, the limiting member being detachably installed in the through groove, the limiting member including: a first segment and a second segment, the first segment having the same size as the through groove, the second segment having a size not greater than the first segment, the first segment being interference-fitted with the through groove, the second segment extending into the opening groove through the through groove, and the second segment being interference-fitted or clearance-fitted with the rubber body.

[0006] According to some embodiments of the present invention, the cross-section of the second segment in the axial direction is a fan-shaped ring or a fan-shaped section.

[0007] According to some embodiments of the present invention, the second segment is a cylindrical structure.

[0008] According to some embodiments of the present invention, the central angle corresponding to the outer edge of the second segment is less than or equal to the central angle corresponding to the inner edge of the first segment.

[0009] According to some embodiments of the present invention, the central angle corresponding to the outer edge of the second segment is α1, and α1 satisfies the relationship: 10°≤α1≤60°.

[0010] According to some embodiments of the present invention, the thickness of the second segment is H1, the depth of the opening groove is H2, and H1 and H2 satisfy the relationship: H1≤H2.

[0011] According to some embodiments of the present invention, the thickness of the second segment is H1, the depth of the opening groove is H2, and H1 and H2 satisfy the relationship: H1 > H2.

[0012] According to some embodiments of the present invention, the through groove includes: a first through groove and a second through groove, the first through groove and the second through groove being disposed opposite to each other on the peripheral wall of the bushing outer tube, and the first through groove and the second through groove being disposed opposite to each other along the radial direction of the bushing outer tube.

[0013] According to some embodiments of the present invention, there are at least three through slots, and the at least three through slots are arranged at intervals around the peripheral wall of the bushing outer tube.

[0014] According to some embodiments of the present invention, the through groove is a square groove, and the two opposite end faces of the square groove are parallel.

[0015] Beneficial effects:

[0016] The bushing assembly of this invention is detachably connected to the outer bushing tube via a limiting member. Multiple different limiting members and the outer bushing tube can be used with interference fits, allowing for simultaneous verification of various solutions, reducing development costs and improving efficiency. The thickness of the limiting member can be adjusted to meet customer requirements for the inflection point of the limiting curve; the width of the limiting member can be adjusted to meet customer rigidity requirements. This bushing assembly has a mature structure, stable performance, and simple processing technology.

[0017] Additional aspects and advantages of the 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 above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a cross-sectional view of a bushing assembly according to an embodiment of the present invention. Figure 1 ; Figure 2 This is a cross-sectional view of a bushing assembly according to an embodiment of the present invention. Figure 2 ; Figure 3 This is a cross-sectional view of a bushing assembly according to an embodiment of the present invention. Figure 3 ; Figure 4 This is a cross-sectional view of a bushing assembly according to an embodiment of the present invention. Figure 4 ; Figure 5This is a schematic diagram of the fit between the bushing outer tube and the limiting member according to an embodiment of the present invention.

[0019] Figure label: 1. Inner bushing tube; 2. Outer bushing tube; 3. Rubber body; 31. Opening groove; 4. Limiting component; 41. First section; 42. Second section. Detailed Implementation

[0020] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. The embodiments of the present invention are described in detail below.

[0021] The following is for reference. Figures 1-5 A bushing assembly according to an embodiment of the present invention is described.

[0022] like Figures 1-4 As shown, the bushing assembly includes: an inner bushing tube 1, an outer bushing tube 2, and a rubber body 3. The inner bushing tube 1 is embedded in the outer bushing tube 2, and the rubber body 3 is connected between the inner bushing tube 1 and the outer bushing tube 2. The rubber body 3 can be vulcanized to the inner bushing tube 1 and the outer bushing tube 2.

[0023] The outer bushing tube 2 has at least one through groove in its axially upward center on its peripheral wall, connecting the inside and outside of the outer bushing tube 2. The rubber body 3 has an opening groove 31 corresponding to the through groove. The bushing assembly also includes a limiting member 4, which is detachably installed in the through groove. The limiting member 4 is made of the same material as the outer bushing tube 2. After the limiting member 4 is installed in the through groove, the outer bushing tube 2 and the limiting member 4 together form a cylindrical outer contour, facilitating the installation of the bushing assembly into the assembly ring. The limiting member 4 is press-fitted to the outer bushing tube 2 through the through groove, allowing for detachable connection. Different limiting members 4 can be replaced according to different road test requirements. The limiting component 4 is interference-fitted with the outer tube of the bushing 2. There is a risk that the outer tube of the bushing 2 will move out before pressing, which would make it difficult to press the bushing into the assembly ring. This also avoids the limiting component 4 sliding back and forth during the road test of the bushing assembly and making abnormal noise.

[0024] In some embodiments, there may be one through slot; for certain unidirectional stress structures, only one through slot may be provided.

[0025] Combination Figures 1-5 As shown, there can be two through slots, including a first through slot and a second through slot. The first and second through slots are arranged opposite each other on the peripheral wall of the outer bushing tube 2, and are arranged radially opposite each other along the outer bushing tube 2. That is, there are two through slots on the outer bushing tube 2, namely the first through slot and the second through slot. The size of the first and second through slots can be the same or different. Limiting components 4 are installed on the first and second through slots respectively, which can adjust the inflection point of the limiting curve of the bushing assembly to achieve a performance curve that cannot be achieved by the original structure.

[0026] In some embodiments, there may be three or more through slots, each through slot being spaced apart around the periphery of the bushing outer tube 2. The through slots may be spaced evenly or spaced unequally according to the actual structure.

[0027] like Figures 2-5 As shown, the limiting member 4 includes a first segment 41 and a second segment 42. The first segment 41 has the same size as the through groove, and the second segment 42 has a size no larger than the first segment 41. The first segment 41 is interference-fitted with the through groove, and the second segment 42 extends into the opening groove 31 through the through groove. The second segment 42 is interference-fitted or clearance-fitted with the rubber body 3. Specifically, the first segment 41 and the second segment 42 are connected. The shape and size of the first segment 41 are consistent with the through groove so that the first segment 41 can be interference-fitted into the through groove. After being assembled with the bushing outer tube 2, the first segment 41 together forms a cylindrical outer contour to facilitate the installation of the bushing assembly into other structures. The second segment 42 extends into the opening groove 31 through the through groove. The second segment 42 can be interference-fitted with the rubber body 3, or clearance-fitted with the rubber segment. The limiting component 4 is fixed on the outer tube of the bushing 2. The outer tube of the bushing 2 and the limiting component 4 can be used together by interference fit. The limiting component 4 cooperates with the rubber body 3 to adjust the inflection point of the limiting curve of the bushing assembly and realize the performance curve that the original structure cannot achieve.

[0028] The width and thickness of the second segment 42 affect the inflection point of the bushing assembly's limiting curve. Therefore, according to different limiting curve inflection point requirements, the bushing outer tube 2, bushing inner tube 1, and bushing rubber can be used as a universal integrated structure. By simply replacing different limiting components 4 and matching the bushing outer tube 2 with different limiting components 4, the inflection point of the bushing assembly's limiting curve can be adjusted, achieving performance curves that the original structure could not achieve. By simply adjusting the thickness or width of the limiting component 4, the performance of the product's hard limiting structure can be quickly adjusted without changing the product's installation boundaries. Furthermore, this bushing assembly has advantages such as mature structure, stable performance, and simple processing technology.

[0029] Installation process: The rubber is first vulcanized and connected to the inner tube 1 and outer tube 2 of the bushing, then the limiting component 4 is assembled, and after the assembly is completed, the bushing assembly is installed into the assembly ring.

[0030] Therefore, by using the interference fit between the limiting component 4 and the outer bushing tube 2, multiple different limiting components 4 and outer bushing tube 2 can be used to simultaneously verify multiple schemes, reducing development costs and improving efficiency. The thickness of the limiting component 4 can be adjusted according to different customer performance requirements to meet the customer's limiting curve inflection point requirements; the width of the limiting component 4 can be adjusted according to different customer performance requirements to meet the customer's stiffness requirements.

[0031] In some embodiments, the cross-section of the second segment 42 in the axial direction is a fan-shaped ring or a fan-shaped structure. Specifically, the second segment 42 can be a fan-shaped ring structure or a fan-shaped structure, and the central angle of the fan-shaped ring or the fan-shaped structure remains unchanged in the axial direction. The outer edge of the fan-shaped ring is connected to the first segment 41, and the inner edge of the fan-shaped ring is in the opening groove 31. The width of the fan-shaped ring is set according to the inflection point of the limiting curve. In the natural state, there may be a gap between the inner edge of the fan-shaped ring and the bottom wall of the opening groove 31. The specific value of the gap can be set according to the inflection point of the limiting curve; or the inner edge of the fan-shaped ring is interference-fitted with the bottom wall of the opening groove 31.

[0032] In some other embodiments, the second segment 42 is a cylindrical structure. The second segment 42 is a cylindrical structure extending toward the bottom wall of the opening groove 31 of the rubber body 3. The diameter of the cylinder is smaller than the minimum dimension of the circumference of the through groove, so as to ensure that after the bushing outer tube 2 and the rubber body 3 are vulcanized and connected, the second segment 42 can pass through the through groove and cooperate with the rubber body 3.

[0033] In some embodiments, the central angle corresponding to the outer edge of the second segment 42 is equal to the central angle corresponding to the inner edge of the first segment 41. Specifically, that is, the central angle corresponding to the outer edge of the second segment 42 is equal to the central angle corresponding to the inner edge of the first segment 41, that is, the projection of the second segment 42 onto the first segment 41 can coincide with the first segment 41, the transition between the first segment 41 and the second segment 42 is smooth, the structure is simple, and the manufacturing difficulty of the limiting member 4 is reduced.

[0034] In other embodiments, such as Figures 1-5 As shown, the central angle corresponding to the outer edge of the second segment 42 is smaller than the central angle corresponding to the inner edge of the first segment 41. Specifically, that is, the central angle corresponding to the outer edge of the second segment 42 is smaller than the central angle corresponding to the inner edge of the first segment 41, that is, the size of the second segment 42 is smaller than that of the first segment 41, so that the rigidity of the bushing assembly can be flexibly adjusted when different limiting parts 4 are replaced.

[0035] In some embodiments, according to Figure 4 As shown, the central angle corresponding to the outer edge of the second segment 42 is α1, and α1 satisfies the relationship: 10°≤α1≤60°. Specifically, the central angle of the outer edge of the second segment 42 can be between 10° and 60°. The width of the second segment 42 affects the stiffness. Adjusting the central angle corresponding to the outer edge of the second segment 42 can meet the customer's stiffness requirements.

[0036] In some embodiments, the thickness of the second segment 42 is H1, and the depth of the opening groove 31 is H2, where H1 and H2 satisfy the relationship: H1 ≤ H2. Specifically, the thickness of the second segment 42 is less than or equal to the depth of the opening groove 31, that is, the end of the second segment 42 away from the first segment 41 is in clearance fit with the rubber body 3. The clearance can be greater than 0, that is, there is a distance between the end of the second segment 42 away from the first segment 41 and the rubber body 3, increasing the soft stroke of the rubber body 3. Depending on actual needs, the clearance can also be equal to 0, that is, the end of the second segment 42 away from the first segment 41 just abuts against the rubber body 3.

[0037] In some embodiments, the thickness of the second segment 42 is H1, and the depth of the opening groove 31 is H2, where H1 and H2 satisfy the relationship: H1 > H2. Specifically, the thickness of the second segment 42 is greater than the depth of the opening groove 31, that is, the end of the second segment 42 away from the first segment 41 interferes with the rubber body 3 to adjust the inflection point of the limiting curve of the bushing assembly.

[0038] In some embodiments, the through groove is a square groove, and the two opposite end faces of the through groove are parallel. The square groove structure facilitates the mating of the limiting member 4 with the bushing outer tube 2, and also facilitates the manufacturing process of the limiting member 4.

[0039] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and 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. Therefore, they should not be construed as limitations on this invention.

[0040] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are 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.

[0041] Although embodiments of the 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 invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A bushing assembly, characterized in that, include: Inner tube of bushing (1); The bushing outer tube (2) has at least one through groove in the middle of its axial direction on its peripheral wall; A rubber body (3) is connected between the inner tube (1) of the bushing and the outer tube (2) of the bushing. The rubber body (3) has an opening groove (31) corresponding to the position of the through groove. The limiting member (4) is detachably installed in the through groove. The limiting member (4) includes: a first section (41) and a second section (42). The first section (41) has the same size as the through groove, and the second section (42) has a size not greater than the first section (41). The first section (41) is interference-fitted with the through groove, and the second section (42) extends into the opening groove (31) through the through groove. The second section (42) is interference-fitted or clearance-fitted with the rubber body (3).

2. The bushing assembly according to claim 1, characterized in that, The second segment (42) has a cross-section in the axial direction that is a fan-shaped ring or fan that gradually contracts inward.

3. The bushing assembly according to claim 1, characterized in that, The second segment (42) is a cylindrical structure.

4. The bushing assembly according to claim 1, characterized in that, The central angle corresponding to the outer edge of the second segment is less than or equal to the central angle corresponding to the inner edge of the first segment (41).

5. The bushing assembly according to claim 4, characterized in that, The central angle corresponding to the outer edge of the second segment (42) is α1, and α1 satisfies the relationship: 10°≤α1≤60°.

6. The bushing assembly according to claim 1, characterized in that, The thickness of the second segment (42) is H1, and the depth of the opening groove (31) is H2. H1 and H2 satisfy the relationship: H1≤H2.

7. The bushing assembly according to claim 1, characterized in that, The thickness of the second segment (42) is H1, and the depth of the opening groove (31) is H2. H1 and H2 satisfy the relationship: H1 > H2.

8. The bushing assembly according to claim 1, characterized in that, The through groove includes a first through groove and a second through groove, the first through groove and the second through groove are arranged opposite to each other on the peripheral wall of the bushing outer tube (2), and the first through groove and the second through groove are arranged opposite to each other along the radial direction of the bushing outer tube (2).

9. The bushing assembly according to claim 1, characterized in that, There are at least three through slots, and the at least three through slots are arranged at intervals around the peripheral wall of the bushing outer tube (2).

10. The bushing assembly according to claim 1, characterized in that, The through groove is a square groove, and the two opposite end faces of the square groove are parallel.

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