A subframe bushing outer tube buckle structure for an automobile chassis

Abstract

The utility model relates to the technical field of automobile chassis auxiliary frame, specifically to a kind of automobile chassis auxiliary frame bush outer tube buckle structure.A kind of automobile chassis auxiliary frame bush outer tube buckle structure, including auxiliary frame bush, it is characterized by: the auxiliary frame bush includes bush inner tube, metal outer tube, the outside of bush inner tube is equipped with metal outer tube, the outside of metal outer tube is equipped with bush outer sleeve, and metal outer tube and bush outer sleeve are combined as a whole by assembly process;Several outer sleeve pit structures are equipped at the outer edge side of bush outer sleeve.Compared with prior art, to match the assembly requirement of iron auxiliary frame sleeve, bush outer sleeve adopts plastic material, and bush outer sleeve is made into pit structure, after bush press fitting in place, bush pit structure of bush outer sleeve and the protrusion of auxiliary frame sleeve are matched, improve the pullout force of bush from auxiliary frame sleeve, enhance the reliability of part use.

Description

Technical Field

[0001] This utility model relates to the field of automotive chassis subframe technology, specifically a subframe bushing outer tube snap-fit ​​structure for automotive chassis. Background Technology

[0002] With increasingly stringent requirements for lightweight vehicles, a large amount of engineering plastics are being used in the automotive industry. In automotive chassis components, rubber bushings used for vibration isolation, especially subframe bushings, often have outer tubes made of plastic. In some platform projects, OEMs use subframes of different materials to accommodate different configurations. Because the different materials result in different processing properties, the rubber bushings must be able to accommodate the assembly requirements of subframes made of both materials. Summary of the Invention

[0003] To overcome the shortcomings of the prior art, this utility model provides a buckle structure for the outer tube of the subframe bushing for automobile chassis. The bushing designed in this way has the requirement of high pull-out force, while reducing costs and achieving lightweighting.

[0004] To achieve the above objectives, a subframe bushing outer tube snap-fit ​​structure for automobile chassis is designed, including a subframe bushing, characterized in that: the subframe bushing includes an inner bushing tube and a metal outer tube, the outer metal tube is sleeved on the outside of the inner bushing tube, and an outer bushing tube is sleeved on the outside of the outer metal tube, and the outer metal tube and the outer bushing tube are integrated through an assembly process; a plurality of outer bushing recesses are provided on the outer edge of the outer bushing tube.

[0005] The bushing cover is made of plastic.

[0006] The outer casing recess structure is an annular groove structure.

[0007] The aforementioned outer jacket recess structure is arranged laterally on the outer edge of the liner jacket.

[0008] The number of the outer casing recess structure is at least three.

[0009] The subframe bushing is press-fitted into the subframe sleeve, and the outer recess structure of the subframe bushing matches the protrusion of the subframe sleeve.

[0010] Compared with the prior art, in order to match the assembly requirements of the steel subframe sleeve, the bushing outer sleeve is made of plastic and has a recessed structure. After the bushing is pressed into place, the bushing recessed structure of the bushing outer sleeve matches the protrusion of the subframe sleeve, which improves the pull-out force of the bushing from the subframe sleeve and enhances the reliability of the parts. Attached Figure Description

[0011] Figure 1 This is a cross-sectional view of the structure of this utility model.

[0012] Figure 2 This is a schematic diagram showing the assembly of the bushing outer sleeve and the subframe sleeve of the subframe bushing of this utility model.

[0013] See Figure 1 , Figure 2 1 is the outer bushing, 2 is the recessed structure of the outer bushing, 3 is the outer metal tube, 4 is the inner bushing tube, and 5 is the subframe sleeve. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] like Figure 1 , Figure 2 As shown, the subframe bushing includes an inner bushing tube and a metal outer tube. The outer metal tube 3 is fitted on the outside of the inner bushing tube 4, and the outer bushing sleeve 1 is fitted on the outside of the outer metal tube 3. The outer metal tube 3 and the outer bushing sleeve 1 are integrated through an assembly process. Several outer sleeve recess structures 2 are provided on the outer edge of the outer bushing sleeve 1.

[0016] The outer cover 1 is made of plastic.

[0017] The outer casing recess structure 2 is an annular groove structure.

[0018] The outer layer recess structure 2 is horizontally arranged on the outer edge of the lining outer layer 1.

[0019] The number of outer casing recess structure 2 is at least 3.

[0020] The subframe bushing is press-fitted into the subframe sleeve 5, and the outer recess structure 2 of the subframe bushing matches the protrusion of the subframe sleeve 5.

[0021] This bushing is designed to match the assembly requirements of the subframe sleeve 5. The bushing outer sleeve 1 is made of plastic and has an outer sleeve recess structure 2. After the bushing is pressed into place, the outer sleeve recess structure 2 of the bushing outer sleeve 1 matches the boss of the subframe sleeve 5, which improves the pull-out force of the bushing from the subframe sleeve 5 and enhances the reliability of the parts.

[0022] In this design, the subframe bushing has its plastic bushing outer sleeve 1 and metal outer tube 3 integrated together through an assembly process.

[0023] By adding pits to the plastic bushing liner 1, the pull-out force can be increased to >20 kN.

[0024] Formula for the applied load: Applying load = n*A*τ + p*A contact *μ R Where n is the number of pits, A is the shear surface area, τ is the allowable pure shear stress, p is the contact pressure, and A contact For the contact area of ​​the outer shell, μR is the coefficient of friction.

[0025] Known data: 1.7 kN (value from a certain experiment), contact surface ratio: 60% (0.6), minimum of 3 pits, average indentation force: 16.5 kN, average ejection force: 23 kN, estimated average ejection force after heat aging: 24.2 kN.

[0026] Estimation of the pushing force for plastic outer tube with indentations: Pushing force range ≈ 3.5 kN … 13 kN → 3~6 indentations are required.

[0027] This design leverages the deformability of plastic materials, allowing them to be used in automotive sub-bulb bushings, replacing metal outer tube bushings. This achieves lightweighting and cost reduction; simultaneously, by optimizing the structure, it avoids assembly cracking issues and improves assembly efficiency. Overall, this enhances the competitiveness of the part.

Claims

1. A snap-fit ​​structure for the outer tube of a subframe bushing for an automobile chassis, comprising a subframe bushing, characterized in that: The subframe bushing includes an inner bushing tube and a metal outer tube. The outer metal tube (3) is fitted on the outside of the inner bushing tube (4), and the outer bushing sleeve (1) is fitted on the outside of the metal outer tube (3). The metal outer tube (3) and the outer bushing sleeve (1) are integrated through an assembly process. Several outer sleeve recesses (2) are provided on the outer edge of the outer bushing sleeve (1).

2. The subframe bushing outer tube snap-fit ​​structure for automobile chassis according to claim 1, characterized in that: The aforementioned liner jacket (1) is made of plastic.

3. The subframe bushing outer tube snap-fit ​​structure for automobile chassis according to claim 1, characterized in that: The outer casing recess structure (2) is an annular groove structure.

4. A snap-fit ​​structure for the outer tube of a subframe bushing for an automobile chassis according to claim 1 or 3, characterized in that: The outer jacket recess structure (2) is arranged laterally on the outer edge of the liner jacket (1).

5. A snap-fit ​​structure for the outer tube of a subframe bushing for an automobile chassis according to claim 1 or 3, characterized in that: The number of the outer casing recess structure (2) is at least 3.

6. The snap-fit ​​structure for the outer tube of the subframe bushing for an automobile chassis according to claim 1, characterized in that: The subframe bushing is press-fitted into the subframe sleeve (5), and the outer recess structure (2) of the subframe bushing matches the protrusion of the subframe sleeve (5).

Images