Auxiliary frame bushing

Abstract

The utility model discloses an auxiliary frame bushing, and belongs to the technical field of automobile parts, the auxiliary frame bushing comprises an inner core, a rubber part and an outer sleeve, the inner core is provided with an inner hole formed along a central axis, the inner core comprises an upper section and a lower section which are coaxially connected up and down, the cross section of the upper section is of a rectangular frame structure, and a plurality of weight reduction grooves are formed in the top surface of the upper section; the cross section of the lower section is rectangular, the length of the upper section is larger than that of the lower section in the X-axis direction, the upper section and the lower section are in smooth transition, the outer sleeve is coaxially arranged on the periphery of the inner core in a sleeved mode, the inner wall face of the outer sleeve is matched with the outer surface of the inner core, and a gap exists between the inner wall face of the outer sleeve and the outer surface of the inner core. The rubber part partially wraps the outer surface of the inner core, the rubber part is partially lined on the inner wall face of the outer sleeve, and the inner core and the outer sleeve are connected through the rubber part in the X-axis direction. The hollow structure is designed to be in an asymmetric state, and a rigidity linear section is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobile parts, in particular to a subframe bushing. BACKGROUND

[0002] The subframe bushing is an important part of the automobile suspension system, mainly used for connecting the subframe and the vehicle body, and plays a role in shock absorption, vibration isolation and positioning. With the continuous development of the automobile industry, the performance requirements of the subframe bushing are gradually increasing, especially in terms of comfort, durability and safety.

[0003] The related prior art such as Chinese patent application "rear subframe rear bushing", application number: CN201811147370.2; discloses a bushing body, the bushing body includes an outer tube, a rubber layer, two limiting blocks and an inner tube made of aluminum material, the inner tube is longitudinally extended in the middle and is provided with a mounting hole penetrating the upper and lower surfaces, the inner tube is longitudinally provided with at least one internal cavity penetrating the upper and lower surfaces, each internal cavity is annularly arranged outside the mounting hole, the rubber layer is sleeved between the outer tube and the inner tube, the inner wall of the rubber layer is adhesively fixed with the outer wall of the inner tube, the outer wall of the rubber layer is adhesively fixed with the inner wall of the outer tube, two limiting blocks are symmetrically sleeved on the outer walls of the upper and lower ends of the inner tube, and the bushing body is fixed to the vehicle body through the mounting hole by bolts.

[0004] The existing subframe bushing design mostly adopts the traditional cylindrical structure, which meets the functional requirements to some extent, but still has deficiencies in load capacity and torsional stiffness. In recent years, some new asymmetric designs and multi-cavity structures have been proposed to improve the overall performance of the bushing. The present application is a new subframe bushing designed as an asymmetric structure to meet the requirements of the linear section of stiffness. CONTENT OF THE UTILITY MODEL

[0005] The technical problem to be solved by the present application is to provide a subframe bushing with a hollow structure in an asymmetric state to realize a linear section of stiffness.

[0006] The technical scheme adopted by the present application is: a subframe bushing, comprising an inner core, a rubber part and an outer sleeve, the inner core is provided with an inner hole along the central axis, the inner core comprises an upper segment and a lower segment which are coaxially connected, the cross section of the upper segment is in the shape of a rectangular frame, and a plurality of weight reduction grooves are formed on the top surface of the upper segment, the cross section of the lower segment is in the shape of a rectangle, the length of the upper segment is greater than that of the lower segment in the X-axis direction, and the upper segment and the lower segment are smoothly connected, the outer sleeve is coaxially sleeved on the outer periphery of the inner core, the inner wall surface of the outer sleeve is adapted to the outer surface of the inner core, and there is a gap between the inner wall surface of the outer sleeve and the outer surface of the inner core, the rubber part is partially wrapped on the outer surface of the inner core and partially lined on the inner wall surface of the outer sleeve, and the inner core and the outer sleeve are connected by the rubber part in the X-axis direction.

[0007] Compared with the prior art, the inner core upper section of the present application has a rectangular frame structure in cross section, and the lower section has a rectangular cross section. The corresponding design of the outer wall of the sleeve is adapted to the outer surface of the inner core. The subframe bushing of the present application adopts an asymmetric structure design, which improves the overall performance, especially in terms of load capacity and torsional stiffness. The inner core includes coaxially connected upper and lower sections, the length of the upper section in the X-axis direction is greater than the length of the lower end, and the upper and lower sections are smoothly connected, so the performance of the subframe bushing of the present application is a linear section in stiffness. The upper and lower sections of the inner core adopt different cross-sectional designs, the upper section is a rectangular frame structure, which can provide better support and stability. The smooth transition design between the upper and lower sections reduces stress concentration and improves durability. The plurality of weight reduction grooves provided on the inner core effectively reduce the overall weight of the bushing without affecting its strength and stiffness. This design helps to improve the energy efficiency and handling of the vehicle.

[0008] In the present application, for the convenience of description, the long side direction in the cross section of the upper section of the inner core is taken as the X-axis direction, and the short side direction is taken as the Y-axis direction. The X-axis and the Y-axis are in the same plane and perpendicular to each other. The axial direction of the inner core is perpendicular to the plane formed by the X-axis and the Y-axis.

[0009] In some embodiments of the present application, the length of the upper section in the X-axis direction is greater than the length in the Y-axis direction, the length of the lower section in the X-axis direction is less than the length in the Y-axis direction, and the lengths of the upper and lower sections in the Y-axis direction are equal. The different lengths of the upper and lower sections in the X-axis and Y-axis directions optimize the structure of the bushing and better adapt to the performance requirements of the automobile suspension system. Through the optimized geometric shape, the bushing can better absorb and isolate vibrations, improve the driving comfort of the vehicle, and reduce the discomfort of passengers during driving. The equal lengths of the upper and lower sections in the Y-axis direction ensure the uniformity of the bushing under stress, which helps to reduce wear and fatigue and prolong the service life of the bushing.

[0010] In some embodiments of the present application, the two end faces of the inner core perpendicular to the Y-axis direction are outwardly convex arc surfaces, the middle of the arc surface is provided with a groove, the groove is parallel to the axial direction, and the groove penetrates the upper end face and the lower end face of the inner core. The provision of the groove can effectively reduce the overall weight of the inner core without significantly affecting its strength and stiffness. This weight reduction design helps to improve the fuel economy and performance of the vehicle. The design of the arc surface and the groove enables the rubber part to better adapt to deformation under stress, enhances the toughness and impact resistance of the rubber part, and reduces the risk of damage under extreme working conditions. The arc surface design can effectively disperse the stress applied to the inner core, reduce stress concentration, and improve the durability and reliability of the structure.

[0011] In some embodiments of the present application, the upper section top surface is provided with four lightening grooves, which are regularly arranged on the outer periphery of the inner hole. The design of the lightening grooves directly reduces the material usage of the upper section, thereby effectively reducing the weight of the entire subframe bushing. Although the lightening grooves reduce the material, through reasonable design and arrangement, the strength and stiffness of the structure can still be maintained. This design ensures that the bushing can work normally without deformation or damage when subjected to load. The regular arrangement of the lightening grooves helps to evenly disperse the stress applied on the bushing, reducing stress concentration phenomenon, thereby improving the durability and reliability of the bushing.

[0012] In some embodiments of the present application, the present application further includes a limiting plate, which is provided with a mounting hole adapted to the inner hole of the inner core, and the two side end faces of the mounting hole are provided with downwardly bent legs. The inner wall surface of the inner core is provided with three mounting openings near the top surface, and the two legs of the mounting hole are embedded into the two oppositely arranged mounting openings. The three mounting openings on the end surface of the inner core can prevent the inner core from being installed in the wrong direction during vulcanization. The presence of the limiting plate enhances the safety of the bushing, especially under high load or extreme working conditions, which can effectively prevent accidental falling or failure of the bushing.

[0013] In some embodiments of the present application, the limiting plate includes a bottom ring portion and a peripheral portion wrapped outside the bottom ring. The bottom ring portion is attached to the top surface of the inner core, and the peripheral portion is higher than the bottom ring portion and is connected to the bottom ring portion through an inclined surface. The bottom ring portion is tightly attached to the top surface of the inner core, providing a good contact surface and ensuring that the limiting plate will not loosen or shift during operation, thereby enhancing the stability of the overall structure. The inclined surface design makes the force transmission smoother, which helps to evenly distribute the force applied on the limiting plate, reduces stress concentration phenomenon, and improves durability and reliability. The height design of the peripheral portion can provide additional support, enhance the overall strength and stiffness of the limiting plate, and ensure that it will not deform when subjected to load.

[0014] In some embodiments of the present application, the outer edge of the limiting plate is upwardly bent to form a flange. The flange design makes the outer edge of the limiting plate form an additional support structure, increases the overall strength and stiffness, and can better withstand external applied force, reducing the risk of deformation.

[0015] In some embodiments of the present application, the bottom surface of the lower section extends in the direction of the X-axis to form a protrusion, and the protrusion is smoothly connected to the lower section. The design of the protrusion provides an additional support surface, which helps to improve the stability of the lower section under stress, reduces the risk of deformation, and ensures reliability under high load conditions. Through the design of smooth transition, the stress applied to the lower section can be effectively dispersed, reducing stress concentration phenomenon, thereby improving the durability and fatigue resistance of the overall structure. The presence of the protrusion enhances the torsional stiffness of the lower section, allowing it to better maintain its shape under torsional load, improving overall maneuverability and safety.

[0016] In some embodiments of the present application, the outer surface of the sleeve is in the form of a circular tube, and the inner wall of the sleeve is provided with an inwardly protruding bump corresponding to the lower section. The top and bottom surfaces of the bump are both smoothly inclined surfaces. The gap between the sleeve and the inner core is designed to effectively absorb and buffer vibrations during operation, further improving the comfort of the ride. The rubber part is wrapped around the outer surface of the inner core and lined on the inner wall of the sleeve, enhancing the shock absorption and vibration isolation effect of the bushing and optimizing the ride comfort of the vehicle. The presence of the bump enhances the connection effect between the sleeve and the lower section.

[0017] In some embodiments of the present application, the outer surface of the sleeve is provided with a plurality of recessed components, and the inner bottom surface of the recessed component is arranged close to the inner wall of the corresponding sleeve. The design of the recessed component directly reduces the amount of material used in the sleeve, thereby effectively reducing the weight of the entire subframe bushing. Despite the reduction in material, the structure still maintains its strength and stiffness through reasonable design and arrangement.

[0018] On the basis of common sense in the art, the above-mentioned embodiments can be combined arbitrarily. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of explaining the preferred embodiments and therefore should not be considered as limiting the scope of the present application. In addition, unless specifically indicated, the drawings only schematically represent the composition or structure of the described objects and can include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0020] Figure 1 is a structural schematic diagram of the present application;

[0021] Figure 2 is a bottom view of the present application;

[0022] Figure 3 is Figure 2 is a sectional view of AA cross-section.

[0023] Figure 4 for Figure 2 Sectional view of section BB;

[0024] Figure 5 This is a schematic diagram of the inner core structure in this application.

[0025] The specific explanations of the reference numerals in the attached drawings are as follows: 1. Inner core; 1a. Upper section; 1b. Lower section; 1c. Protrusion; 2. Rubber part; 3. Outer sleeve; 4. Weight reduction groove; 5. Limiting plate; 6. Mounting hole; 7. Support leg; 8. Mounting port; 9. Bottom ring; 10. Outer perimeter; 11. Flanged edge; 12. Groove; 13. Protrusion; 14. Concave component. Detailed Implementation

[0026] The present application will now be described in detail with reference to the accompanying drawings.

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0028] A subframe bushing, embodiment one as follows Figures 1 to 4 As shown, the bushing includes an inner core 1, a rubber component 2, and an outer sleeve 3. The inner core 1 has an inner hole along its central axis and comprises an upper section 1a and a lower section 1b coaxially connected vertically. The upper section 1a has a rectangular frame structure in cross-section, and its top surface has multiple weight-reducing grooves 4, effectively reducing the overall weight of the bushing without affecting its strength and stiffness. This design helps improve energy economy and vehicle handling. The lower section 1b has a rectangular cross-section, and in the X-axis direction, the length of the upper section 1a is greater than the length of the lower section. The upper section 1a and the lower section 1b have a smooth transition, thus exhibiting linear stiffness in the performance of the subframe bushing in this application. The upper and lower sections 1b of the inner core 1 adopt different cross-sectional designs. The upper section 1a has a rectangular frame structure, which provides better support and stability. The smooth transition design between the upper and lower sections 1b reduces stress concentration and improves durability. The outer sleeve 3 is coaxially fitted around the outer periphery of the inner core 1. The inner wall surface of the outer sleeve 3 is adapted to the outer surface of the inner core 1, and there is a gap between the inner wall surface of the outer sleeve 3 and the outer surface of the inner core 1. The rubber component 2 partially wraps around the outer surface of the inner core 1 and partially lines the inner wall surface of the outer sleeve 3. The inner core 1 and the outer sleeve 3 are connected in the X-axis direction through the rubber component 2. The subframe bushing of this application adopts an asymmetrical structural design, which improves the overall performance, especially in terms of load-bearing capacity and torsional stiffness.

[0029] In this application, for the convenience of description, the long side direction in the cross section of the upper section 1a of the inner core 1 is taken as the X-axis direction, the short side direction is taken as the Y-axis direction, the X-axis and the Y-axis are in the same plane and perpendicular to each other. The axial direction of the inner core 1 is perpendicular to the plane formed by the X-axis and the Y-axis.

[0030] As shown in the second embodiment, Figures 1 to 5 the length of the upper section 1a in the X-axis direction is greater than that in the Y-axis direction, the length of the lower section 1b in the X-axis direction is less than that in the Y-axis direction, and the lengths of the upper section 1a and the lower section 1b in the Y-axis direction are equal. The different lengths of the upper section 1a and the lower section 1b in the X-axis and Y-axis directions optimize the structure of the bushing, which can better adapt to the performance requirements of the automobile suspension system. Through the optimized geometry, the bushing can better absorb and isolate vibrations, improve the driving comfort of the vehicle, and reduce the discomfort of passengers during driving. The equal lengths of the upper and lower sections 1b in the Y-axis direction ensure the uniformity of the bushing under stress, which helps to reduce wear and fatigue and prolong the service life of the bushing.

[0031] The two end faces of the inner core 1 arranged perpendicular to the Y-axis direction are outwardly convex arc surfaces, the middle of the arc surface is provided with a groove 12, the groove 12 is arranged parallel to the axial direction, and the groove 12 penetrates the upper end face and the lower end face of the inner core 1. The arrangement of the groove 12 can effectively reduce the overall weight of the inner core 1 without significantly affecting its strength and stiffness. This weight reduction design helps to improve the fuel economy and performance of the vehicle. The design of the arc surface and the groove 12 enables the rubber part 2 to better adapt to deformation under stress, enhances the toughness and impact resistance of the rubber part 2, and reduces the risk of damage under extreme working conditions. The arc surface design can effectively disperse the stress applied to the inner core 1, reducing stress concentration and thus improving the durability and reliability of the structure.

[0032] Four weight reduction grooves 4 are arranged on the top surface of the upper section 1a, and the weight reduction grooves 4 are regularly arranged on the outer periphery of the inner hole. The design of the weight reduction grooves 4 directly reduces the amount of material used in the upper section 1a, thereby effectively reducing the weight of the entire subframe bushing. Although the weight reduction grooves 4 reduce the amount of material, through reasonable design and arrangement, the strength and stiffness of the structure can still be maintained. This design ensures that the bushing can work normally without deformation or damage under load. The regular arrangement of the weight reduction grooves 4 helps to uniformly disperse the stress applied to the bushing, reducing stress concentration and thus improving the durability and reliability of the bushing.

[0033] The bottom surface of the lower section 1b extends to the X-axis direction to form a protruding part 1c, and the protruding part 1c is smoothly connected to the lower section 1b. The design of the protruding part 1c provides an additional support surface, which helps to improve the stability of the lower section 1b under stress, reduces the risk of deformation, and ensures reliability under high load conditions. Through the smooth transition design, the stress applied to the lower section 1b can be effectively dispersed, reducing stress concentration, thereby improving the durability and fatigue resistance of the overall structure. The presence of the protruding part 1c enhances the torsional stiffness of the lower section 1b, allowing it to better maintain its shape under torsional load, improving overall handling and safety.

[0034] The outer surface of the outer sleeve 3 is in a circular tube structure, and the inner wall surface of the outer sleeve 3 is provided with an inward protruding bump 13 adapted to the lower section 1b. The top surface and the bottom surface of the bump 13 are both smooth inclined surfaces, and the bump 13 is located in the X-axis direction of the lower section 1b. The gap between the outer sleeve 3 and the inner core 1 is designed to effectively absorb and buffer vibrations during operation, further improving the comfort of the ride. The rubber part 2 is partially wrapped around the outer surface of the inner core 1 and lined on the inner wall surface of the outer sleeve 3, enhancing the shock absorption and vibration isolation effect of the bushing and optimizing the ride comfort of the vehicle. The bump 13 is provided corresponding to the lower end, and the presence of the bump 13 can enhance the connection effect between the outer sleeve 3 and the lower section 1b.

[0035] The outer surface of the outer sleeve 3 is provided with a plurality of concave components 14, and the inner bottom surface of the concave component 14 is close to the inner wall surface of the outer sleeve 3 corresponding to it. The design of the concave component 14 directly reduces the material usage of the outer sleeve 3, thereby effectively reducing the weight of the entire subframe bushing. Although the concave component 14 reduces the material, through reasonable design and arrangement, the strength and stiffness of the structure can still be maintained.

[0036] The other contents of Example Two are the same as those of Example One.

[0037] Example Three, as shown in Figures 1 to 4 The inner wall surface of the inner core 1, close to the top surface, is provided with three mounting openings 8, and the two feet 7 of the mounting hole 6 are embedded into the two oppositely arranged mounting openings 8. The three mounting openings 8 provided on the end surface of the inner core 1 can prevent the inner core 1 from being installed in the wrong direction in the left and right directions during vulcanization. The presence of the limiting plate 5 enhances the safety of the bushing, especially under high load or extreme working conditions, which can effectively prevent accidental falling or failure of the bushing.

[0038] The limiting plate 5 includes a bottom ring part 9 and a peripheral part 10 wrapped outside the bottom ring, the bottom ring part 9 is attached to the top surface of the inner core 1, the peripheral part 10 is higher than the bottom ring part 9, and the bottom ring part 9 and the peripheral part 10 are connected by an inclined surface. The bottom ring part 9 is tightly attached to the top surface of the inner core 1, providing a good contact surface and ensuring that the limiting plate 5 will not loosen or shift during operation, thereby enhancing the stability of the overall structure. The inclined surface design makes the force transmission smoother, which helps to evenly distribute the force applied on the limiting plate 5 and reduces stress concentration, thereby improving durability and reliability. The height design of the peripheral part 10 can provide additional support and enhance the overall strength and stiffness of the limiting plate 5, ensuring that it will not deform when subjected to load.

[0039] The outer edge of the limiting plate 5 is bent upwards to form a flange 11. The design of the flange 11 makes the outer edge of the limiting plate 5 form an additional support structure, increasing the overall strength and stiffness, and better able to withstand external forces, reducing the risk of deformation.

[0040] The other contents of Example Three are the same as those of Example One or Example Two.

[0041] The above has been a detailed introduction to the present application, and the principles and implementation modes of the present application have been described by applying specific examples. The above description of the examples is only to help understand the present application and the core idea. It should be noted that for ordinary skilled persons in the technical field, without departing from the principles of the present application, the present application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A subframe bushing characterized by, It includes inner core (1), rubber part (2) and outer sleeve (3), the inner core (1) is provided with the inner hole along the central axis, the inner core (1) includes coaxially and downwardly connected upper section (1a) and lower section (1b), the cross section of the upper section (1a) is rectangular frame structure, and the top surface of the upper section (1a) is provided with a plurality of lightening grooves (4), the cross section of the lower section (1b) is rectangular, the length of the upper section (1a) in X-axis direction is greater than the length of the lower end, the upper section (1a) and the lower section (1b) are smoothly connected, the outer sleeve (3) is coaxially sleeved on the outer periphery of the inner core (1), the inner wall surface of the outer sleeve (3) is adapted to the outer surface of the inner core (1), and there is a gap between the inner wall surface of the outer sleeve (3) and the outer surface of the inner core (1), the rubber part (2) is partially wrapped on the outer surface of the inner core (1) and partially lined on the inner wall surface of the outer sleeve (3), and the inner core (1) and the outer sleeve (3) are connected through the rubber part (2) in the X-axis direction.

2. A subframe bushing according to claim 1, wherein The length of the upper section (1a) in the X-axis direction is greater than the length in the Y-axis direction, the length of the lower section (1b) in the X-axis direction is less than the length in the Y-axis direction, and the length of the upper section (1a) and the lower section (1b) in the Y-axis direction is equal.

3. The subframe bushing of claim 1, wherein The two end surfaces of the inner core (1) arranged perpendicularly to the Y-axis direction are outwardly convex arc surfaces, a groove (12) is arranged in the middle of the arc surface, the groove (12) is arranged parallel to the axial direction, and the groove (12) penetrates the upper end surface and the lower end surface of the inner core (1).

4. The subframe bushing of claim 1, wherein The top surface of the upper section (1a) is provided with four lightening grooves (4), and the lightening grooves (4) are regularly arranged on the outer periphery of the inner hole.

5. The subframe bushing of claim 1, wherein It also includes a limiting plate (5), the limiting plate (5) is provided with a mounting hole (6) adapted to the inner hole of the inner core (1), the two side end surfaces of the mounting hole (6) are provided with downwardly bent supporting legs (7), the inner wall surface of the inner core (1) is provided with three mounting openings (8) close to the top surface, and the two supporting legs (7) of the mounting hole (6) are embedded into the two oppositely arranged mounting openings (8).

6. A subframe bushing according to claim 5, wherein, The limiting plate (5) includes a bottom ring part (9) and a peripheral part (10) wrapped outside the bottom ring, the bottom ring part (9) is attached to the top surface of the inner core (1), the peripheral part (10) is arranged higher than the bottom ring part (9), and the bottom ring part (9) and the peripheral part (10) are connected through an inclined surface.

7. A subframe bushing according to claim 5, wherein The outer edge of the limiting plate (5) is upwardly bent to form a flange (11).

8. The subframe bushing of claim 1, wherein The bottom surface of the lower section (1b) extends in the X-axis direction to form a protruding part (1c), and the protruding part (1c) and the lower section (1b) are smoothly connected.

9. The subframe bushing of claim 1, wherein The outer surface of the outer sleeve (3) is in the form of a circular tube, the inner wall surface of the outer sleeve (3) is adapted to the lower section (1b) and is provided with an inwardly convex protrusion (13), the top surface and the bottom surface of the protrusion (13) are both smooth inclined surfaces, and the protrusion (13) is located in the X-axis direction of the lower section (1b).

10. The subframe bushing of claim 1, wherein The outer surface of the outer sleeve (3) is provided with a plurality of concave components (14), and the inner bottom surface of the concave component (14) is arranged close to the inner wall surface of the corresponding outer sleeve (3).

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