Torsion beam hydraulic bushing

Abstract

The utility model relates to a torsion beam hydraulic bushing which comprises an inner pipe, an outer framework coaxially arranged on the periphery of the inner pipe in a sleeving mode, a rubber pad arranged between the inner pipe and the outer framework and a reinforcing framework arranged in the rubber pad, and a liquid chamber used for packaging damping liquid is formed among the inner pipe, the rubber pad and the outer framework. The torsion beam hydraulic bushing further comprises a sliding block which is arranged in the liquid chamber in a replaceable mode, and a flow channel is formed in the sliding block. The sliding block is made of nylon glass fibers. The connecting structure is suitable for connecting the torsion beam and the automobile body of the electric automobile, can effectively reduce impact and attenuate vibration, and is low in cost and good in adaptability to various working conditions.

Description

Technical Field

[0001] The utility model relates to the field of electric vehicle parts, in particular to a torsion beam hydraulic bushing. Background Art

[0002] In order to effectively isolate the vibration from the road, the rubber isolator used in the car is required to have a large damping characteristic under low-frequency, large-amplitude excitation. The hysteresis angle of a typical rubber suspension or rubber bushing is generally between 3° and 10°. Although the hysteresis angle of the rubber bushing can be greater than 10° by adjusting the rubber formula, the fatigue performance of such a rubber bushing is relatively poor. In order to improve the damping characteristics of the rubber, liquid is encapsulated in the bushing to increase its damping.

[0003] Since electric vehicles using torsion beams are connected to the vehicle body only through torsion beam bushings on both sides, the torsion beam bushings play an important role in reducing impact and attenuating vibration. At present, the torsion beam bushings of electric vehicles are mainly ordinary rubber bushings, and their effect on impact and vibration needs to be improved. Summary of the invention

[0004] The utility model aims to provide a torsion beam hydraulic bushing which can effectively reduce impact and attenuate vibration and reduce cost.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A torsion beam hydraulic bushing comprises an inner tube, an outer frame coaxially sleeved on the outer periphery of the inner tube, a rubber pad arranged between the inner tube and the outer frame, and a reinforcing frame built into the rubber pad. A liquid chamber for encapsulating damping liquid is formed between the inner tube, the rubber pad and the outer frame. The torsion beam hydraulic bushing also comprises a slider replaceably arranged in the liquid chamber, and a flow channel is formed on the slider.

[0007] The cross-sectional shape of the flow channel is an arcuate shape.

[0008] The slider includes a first surface disposed facing the inner side surface of the outer frame, and a second surface connected to the first surface and disposed facing the outer side surface of the inner tube, and the flow channel is formed on the second surface.

[0009] The material of the sliding block is nylon glass fiber.

[0010] A rubber block corresponding to the flow channel is arranged on the outer side wall of the inner tube.

[0011] A protrusion is formed on the outer side wall of the inner tube, and the rubber block is arranged on the protrusion.

[0012] The outer shape of the rubber block matches the shape of the flow channel.

[0013] The rubber pad includes a fixing portion disposed on both sides of the cross section of the inner tube in the X direction, and an extending portion connected to the fixing portion and extending to both sides of the cross section of the inner tube in the Y direction. The liquid chamber is formed on both sides of the cross section of the inner tube in the Y direction.

[0014] The reinforcing frame includes a main frame built into the fixing portion, and a sub-frame built into the extending portion and connected to the main frame.

[0015] The inner tube, the outer frame and the reinforcement frame are all made of aluminum alloy.

[0016] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art: the present invention is suitable for connecting the torsion beam of an electric vehicle with the vehicle body, can effectively reduce impact and attenuate vibration, has low cost, and has good adaptability to various working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attached Figure 1 It is a longitudinal sectional view of the torsion beam hydraulic bushing of the utility model along the X direction.

[0018] Attached Figure 2 It is a longitudinal sectional view of the torsion beam hydraulic bushing of the utility model along the Y direction.

[0019] In the above figures: 1. inner tube; 2. outer frame; 3. rubber pad; 4. reinforcing frame; 5. slider; 6. rubber block; 7. liquid chamber. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the embodiments shown in the accompanying drawings.

[0021] Embodiment 1: As shown in the attached Figure 1 and attached Figure 2 As shown, a torsion beam hydraulic bushing includes an inner tube 1, an outer frame 2, a rubber pad 3, a reinforcement frame 4, a sliding block 5 and a rubber block 6.

[0022] The inner tube 1 is tubular, and its axial direction is defined as the Z direction, and the two perpendicular directions on its cross section are defined as the X direction and the Y direction respectively. The tubular outer frame 2 is coaxially sleeved on the outer periphery of the inner tube 1. The rubber pad 3 is arranged between the inner tube 1 and the outer frame 2, and the reinforcing frame 4 is built in the rubber pad 3. A liquid chamber 7 is formed between the inner tube 1, the rubber pad 3 and the outer frame 2, and the liquid chamber 7 is used to contain the damping liquid. The slider 5 is replaceably arranged in the liquid chamber 7, and a flow channel is formed on the slider 5. The cross-sectional shape of the flow channel is usually arched. The slider 5 includes a first surface arranged on the inner side of the outer frame 2, and a second surface connected to the first surface and arranged on the outer side of the inner tube 1, and the flow channel is formed on the second surface. Different replaceable sliders 5 have different volumes, damping angle characteristics, stiffness characteristics or flow channel lengths. A rubber block 6 corresponding to the flow channel is arranged on the outer wall of the inner tube 1, and the shape of the rubber block 6 matches the shape of the flow channel. A protrusion may be formed on the outer wall of the inner tube 1 , and the rubber block 6 is disposed on the protrusion.

[0023] In this embodiment, the rubber pad 3 includes a fixing portion disposed on both sides of the cross section of the inner tube 1 in the X direction, and an extension portion connected to the fixing portion and extending to both sides of the cross section of the inner tube 1 in the Y direction. The reinforcing frame 4 includes a main frame built into the fixing portion, and a sub-frame built into the extension portion and connected to the main frame. Thus, the liquid chamber 7 is formed on both sides of the cross section of the inner tube 1 in the Y direction.

[0024] In this solution, the slider 5 is made of high-strength nylon glass fiber, and a flow channel is injection molded thereon. The inner tube 1 is made of high-strength aluminum alloy to meet the bolt locking strength requirements. The outer frame 2 is made of high-strength aluminum alloy to meet the extrusion force requirements. The reinforcement frame 4 is made of high-strength aluminum alloy to support the rubber pad 3 and the liquid chamber 7. The rubber pad 3 and the rubber block 6 are made of natural rubber, which has high resilience and high wear resistance. The damping liquid uses antifreeze, which flows back and forth in the two liquid chambers 7 under low-frequency conditions to provide damping characteristics.

[0025] During manufacturing, the inner tube 1, the reinforcing frame 4, the rubber pad 3 and the rubber block 6 are first vulcanized into a rubber component, and then the rubber component is pre-assembled with the outer frame 2 and the slider 5. Through the vacuum and liquid injection process, the hydraulic bushing assembly is finally sealed.

[0026] The above scheme uses an easily replaceable and adjustable slider 5. Based on the existing hydraulic bushing mold, by replacing different sliders 5, the factors affecting the damping characteristics of the hydraulic bushing, such as the chamber, flow channel, and liquid capacity of the liquid chamber 7, can be adjusted respectively, providing different damping characteristics and stiffness characteristics, which is convenient for the OEM to match the vehicle NVH performance in the early stage. Its beneficial effects are as follows:

[0027] 1. Can effectively reduce impact and attenuate vibration;

[0028] 2. Through the adjustable hydraulic bushing, the damping characteristics can be adjusted by designing different sliders 5. For example, by changing the proportion of the slider 5 volume in the liquid chamber 7, by changing the damping angle characteristics or the dynamic stiffness characteristics, by changing the length of the flow channel, the peak frequency of the hydraulic bushing can be changed. Compared with the traditional hydraulic bushing that requires the entire set of vulcanization molds to be changed, the adjustable hydraulic bushing has lower debugging time and material costs, and is more suitable for OEMs to match appropriate hydraulic bushings according to actual needs;

[0029] 3. Double-layer rubber design allows for greater axial / yaw / torsion deformation to accommodate the torsion beam bushing's operating conditions.

[0030] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A torsion beam hydraulic bushing, comprising an inner tube, an outer frame coaxially sleeved on the outer periphery of the inner tube, a rubber pad arranged between the inner tube and the outer frame, and a reinforcing frame built into the rubber pad, wherein a liquid chamber for encapsulating a damping liquid is formed between the inner tube, the rubber pad and the outer frame, and characterized in that: The torsion beam hydraulic bushing also includes a slider replaceably disposed in the liquid chamber, and a flow channel is formed on the slider.

2. The torsion beam hydraulic bushing according to claim 1, characterized in that: The cross-sectional shape of the flow channel is an arcuate shape.

3. The torsion beam hydraulic bushing according to claim 1, characterized in that: The slider includes a first surface disposed facing the inner side surface of the outer frame, and a second surface connected to the first surface and disposed facing the outer side surface of the inner tube, and the flow channel is formed on the second surface.

4. The torsion beam hydraulic bushing according to claim 1, characterized in that: The material of the sliding block is nylon glass fiber.

5. The torsion beam hydraulic bushing according to claim 1, characterized in that: A rubber block corresponding to the flow channel is arranged on the outer side wall of the inner tube.

6. The torsion beam hydraulic bushing according to claim 5, characterized in that: A protrusion is formed on the outer side wall of the inner tube, and the rubber block is arranged on the protrusion.

7. The torsion beam hydraulic bushing according to claim 5, characterized in that: The outer shape of the rubber block matches the shape of the flow channel.

8. The torsion beam hydraulic bushing according to claim 1, characterized in that: The rubber pad includes a fixing portion disposed on both sides of the cross section of the inner tube in the X direction, and an extending portion connected to the fixing portion and extending to both sides of the cross section of the inner tube in the Y direction. The liquid chamber is formed on both sides of the cross section of the inner tube in the Y direction.

9. The torsion beam hydraulic bushing according to claim 8, characterized in that: The reinforcing frame includes a main frame built into the fixing portion, and a sub-frame built into the extending portion and connected to the main frame.

10. The torsion beam hydraulic bushing according to claim 1, characterized in that: The inner tube, the outer frame and the reinforcement frame are all made of aluminum alloy.

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