Hydraulic bushing for automobile trailing arm

Abstract

The utility model relates to a hydraulic bushing for an automobile trailing arm, which comprises an inner core, an outer ring coaxially sleeved on the periphery of the inner core, a rubber layer arranged between the inner core and the outer ring, and a framework arranged in the rubber layer, two liquid chambers are symmetrically formed among the inner core, the rubber layer and the outer ring, damping liquid is filled in the liquid chambers, a runner plate is arranged in each liquid chamber, and the rubber layer is arranged on the rubber layer. And a runner with a Tesla valve structure is arranged on the runner plate. The runner plate comprises an inner surface facing the inner core, an outer surface facing the outer ring and a side surface connecting the inner surface and the outer surface, a through hole penetrating through the inner surface to the outer surface is formed in the runner plate, the runner is arranged on the outer surface, an inlet of the runner is located in the side surface, and an outlet of the runner corresponds to the through hole. The damping peak value is adjusted by improving the shape of the flow channel, the damping performance is enhanced, and the performance requirements of comfort and stable control can be better met.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a hydraulic bushing for an automobile trailing arm. Background Art

[0002] When a car is driving on the road, it receives road signal stimulation, and the suspension positioning parameters change, which affects the vehicle's handling stability and ride comfort. In this case, a rubber bushing can be used to connect the vehicle body and the suspension structure to effectively avoid collisions caused by rigid impacts. It can also absorb vibrations and play a buffering role, thereby improving ride comfort.

[0003] As the consumption level and performance requirements of the general public for automobiles are getting higher and higher, comfort must become a consideration when purchasing a vehicle. In fact, under the same working conditions, compared with traditional rubber bushings, hydraulic bushings can withstand larger radial forces and torsional angles, making the ride more comfortable. Therefore, hydraulic bushings are important comfort bushings that connect the body and suspension.

[0004] In the hydraulic bushing, a flow channel plate is set in the chamber and filled with liquid. The liquid provides damping characteristics. The channel length and shape of the flow channel plate affect the damping peak. The two cooperate under the action of external force, inevitably generating internal friction, converting kinetic energy into heat energy, thereby reducing the amplitude. Figure 1 As shown, the flow channel 6 on the flow channel plate 5 in the existing hydraulic bushing is usually a single-channel structure. From actual observation, the damping of the current form of hydraulic bushing still has room for improvement. The damping peak can be further adjusted by limiting the flow channel shape of the flow channel plate, thereby increasing the damping performance and further improving the performance requirements of comfort and stable control. Summary of the invention

[0005] The utility model aims to provide a hydraulic bushing for a vehicle trailing arm which can improve the damping peak value and enhance the damping performance so as to meet the requirements of comfort and handling.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A hydraulic bushing for an automobile trailing arm comprises an inner core, an outer ring coaxially sleeved on the outer periphery of the inner core, a rubber layer arranged between the inner core and the outer ring, and a frame built into the rubber layer. Two liquid chambers are symmetrically formed between the inner core, the rubber layer and the outer ring. The liquid chambers are filled with damping liquid. A flow channel plate is arranged in each of the liquid chambers, and a flow channel with a Tesla valve structure is arranged on the flow channel plate.

[0008] The flow channel plate includes an inner surface facing the inner core, an outer surface facing the outer ring, and a side surface connecting the inner surface and the outer surface. A through hole is provided on the flow channel plate, which passes through the inner surface to the outer surface. The flow channel is arranged on the outer surface, the inlet of the flow channel is located on the side surface, and the outlet of the flow channel is arranged corresponding to the through hole.

[0009] The flow channel includes at least four flow channel units connected in series, each of the flow channel units includes a diverter block and a main flow channel and a branch flow channel separated by the diverter block, the main flow channels of each of the flow channel units are connected in sequence, and the branch flow channels of each of the flow channel units are alternately distributed on both sides of the main flow channel.

[0010] The inner surface of the flow channel plate is partially concave to form a concave portion, and a rubber block is arranged in the liquid chamber corresponding to the concave portion.

[0011] The rubber block is arranged on the inner core.

[0012] A protrusion is arranged on the outer side surface of the inner core, a pit is arranged in the middle of the protrusion, and the rubber block is arranged in the pit.

[0013] The rubber layer includes a first portion covering a partial outer side surface of the inner core and a second portion extending from the first portion to both ends of the outer ring, and the frame is disposed in the second portion.

[0014] Both ends of the outer ring have constrictions, and the end of the second part is arranged in the constriction.

[0015] The inner core and the outer ring are both made of aluminum alloy.

[0016] The flow channel plate is made of nylon plastic.

[0017] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art: the utility model adjusts the damping peak by improving the flow channel shape, enhances the damping performance, and can better meet the performance requirements of comfort and stable control. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attached Figure 1 It is a structural schematic diagram of a flow channel plate in an existing hydraulic bushing.

[0019] Attached Figure 2 The utility model is a cross-sectional view of the assembly of the hydraulic bushing for the automobile trailing arm.

[0020] Attached Figure 3 The utility model is a schematic structural diagram of a flow channel plate in a hydraulic bushing for an automobile trailing arm.

[0021] Attached Figure 4The utility model is a schematic diagram of the flow channel form of the flow channel plate in the hydraulic bushing for the automobile trailing arm.

[0022] In the above figures: 1, inner core; 2, outer ring; 3, rubber layer; 4, skeleton; 5, flow channel plate; 6, flow channel; 7, rubber block. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the embodiments shown in the accompanying drawings.

[0024] Embodiment 1: As shown in the attached Figure 2 To Attachment Figure 4 As shown, a hydraulic bushing for a vehicle longitudinal arm includes an inner core 1, an outer ring 2, a rubber layer 3, a skeleton 4 and a flow channel plate 5. The inner core 1 is made of high-strength aluminum alloy, which meets the strength requirements and is corrosion-resistant. The outer ring 2 is also made of high-strength aluminum alloy. The outer ring 2 is coaxially sleeved on the outer periphery of the middle part of the inner core 1. The rubber layer 3 made of natural rubber is arranged between the inner core 1 and the outer ring 2, and the skeleton 4 is built in the rubber layer 3. Usually, the rubber layer 3 includes a first part covering the local outer side surface of the inner core 1, a second part extending from the first part to the two ends of the outer ring 2, and the skeleton 4 is arranged in the second part. Both ends of the outer ring 2 have a constriction, and the end of the second part is arranged in the constriction. Based on the above structure, two liquid chambers are symmetrically formed between the inner core 1, the rubber layer 3 and the outer ring 2, and the liquid chambers are filled with damping liquid.

[0025] A flow channel plate 5 made of high-strength nylon plastic material is arranged in each liquid chamber, that is, two flow channel plates 5 with different thicknesses are arranged in two liquid chambers respectively. A flow channel 6 of a Tesla valve structure is arranged on the flow channel plate 5. Specifically, the flow channel plate 5 includes an inner surface facing the inner core 1, an outer surface facing the outer ring 2, and a side surface connecting the inner surface and the outer surface. A through hole is provided on the flow channel plate 5 that passes through the inner surface to the outer surface. The flow channel 6 of the Tesla valve structure is arranged on the outer surface, the inlet of the flow channel 6 is located on the side surface, and the outlet of the flow channel 6 is arranged corresponding to the through hole. The flow channel 6 includes at least four flow channel 6 units connected in series, each flow channel 6 unit includes a diverter block and a main flow channel 6 and a branch flow channel 6 separated by the diverter block. The main flow channels 6 of each flow channel 6 unit are connected in sequence, and the branch flow channels 6 of each flow channel 6 unit are alternately distributed on both sides of the main flow channel 6. The local concave of the inner surface of the flow channel plate 5 forms an inner concave portion, and a rubber block 7 is arranged corresponding to the inner concave portion in the liquid chamber. The rubber block 7 is arranged on the inner core 1 . A protrusion may be arranged on the outer surface of the inner core 1 . A pit is arranged in the middle of the protrusion, and the rubber block 7 is arranged in the pit.

[0026] In the above scheme, the inner core 1 is formed by casting, which is easy to achieve the required shape, improve processing efficiency and meet the yield strength requirements. The skeleton 4 adopts a casting molding process, which is easy to achieve a complex shape, easy to meet the yield strength requirements, and light. The outer tube adopts a profile cutting process, and the future material is cut according to the design and assembly process requirements, and it is easy to obtain the specified size. The flow channel plate 5 adopts an injection molding process, especially for the molding of the flow channel 6, pay attention to the control of the cross-sectional size of the flow channel 6, and it is easy to obtain the required complex shape.

[0027] After the above parts are ready, they are assembled. First, the inner core 1 and the frame 4 are placed on a special vulcanizer to vulcanize the rubber to form part A. Then, the vulcanized parts are assembled with the flow channel plate 5 to form part B. Finally, part B is fixed, and the outer ring 2 is pressed into part B to the specified position, and then liquid is poured and pressed down to form the attached part. Figure 1 The assembly C shown. In this process, the installation position and method of the new flow channel plate 5 are the same as those of the original flow channel plate 5 .

[0028] The flow channel 6 in the flow channel plate 5 is equivalent to the one-way conduction of the Tesla valve. When the radial load on one side of the bushing changes, the volume of the loaded cavity becomes smaller, and the pressure increases, forcing the liquid to flow through the channel into the second liquid chamber, that is, the fluid flows from port A to port B. The fluid is also interconnected through the gap between the flow channel plate 5 and the rubber side (intercommunication window) to achieve interconnection between the two cavities.

[0029] The above scheme limits the shape of the flow channel 6 of the flow channel plate 5, and the damping peak is further adjusted, thereby increasing the damping performance and further improving the performance requirements of comfort and stable handling. When the bushing is subjected to a high-intensity radial impact, it can respond quickly and further reduce the return impact. It is a hydraulic bushing structure that achieves high damping.

[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 hydraulic bushing for a vehicle trailing arm, comprising an inner core, an outer ring coaxially sleeved on the outer periphery of the inner core, a rubber layer arranged between the inner core and the outer ring, and a frame built into the rubber layer, wherein two liquid chambers are symmetrically formed between the inner core, the rubber layer, and the outer ring, the liquid chambers are filled with damping liquid, and a flow channel plate is arranged in each of the liquid chambers, characterized in that: The flow channel plate is provided with a flow channel with a Tesla valve structure.

2. The hydraulic bushing for a vehicle trailing arm according to claim 1, characterized in that: The flow channel plate includes an inner surface facing the inner core, an outer surface facing the outer ring, and a side surface connecting the inner surface and the outer surface. A through hole is provided on the flow channel plate, which passes through the inner surface to the outer surface. The flow channel is arranged on the outer surface, the inlet of the flow channel is located on the side surface, and the outlet of the flow channel is arranged corresponding to the through hole.

3. The hydraulic bushing for a vehicle trailing arm according to claim 2, characterized in that: The flow channel includes at least four flow channel units connected in series, each of the flow channel units includes a diverter block and a main flow channel and a branch flow channel separated by the diverter block, the main flow channels of each of the flow channel units are connected in sequence, and the branch flow channels of each of the flow channel units are alternately distributed on both sides of the main flow channel.

4. The hydraulic bushing for a vehicle trailing arm according to claim 1, characterized in that: The inner surface of the flow channel plate is partially concave to form a concave portion, and a rubber block is arranged in the liquid chamber corresponding to the concave portion.

5. The hydraulic bushing for a vehicle trailing arm according to claim 4, characterized in that: The rubber block is arranged on the inner core.

6. The hydraulic bushing for a vehicle trailing arm according to claim 5, characterized in that: A protrusion is arranged on the outer side surface of the inner core, a pit is arranged in the middle of the protrusion, and the rubber block is arranged in the pit.

7. The hydraulic bushing for a vehicle trailing arm according to claim 1, characterized in that: The rubber layer includes a first portion covering a partial outer side surface of the inner core and a second portion extending from the first portion to both ends of the outer ring, and the frame is disposed in the second portion.

8. The hydraulic bushing for a vehicle trailing arm according to claim 7, characterized in that: Both ends of the outer ring have constrictions, and the end of the second part is arranged in the constriction.

9. The hydraulic bushing for a vehicle trailing arm according to claim 1, characterized in that: The inner core and the outer ring are both made of aluminum alloy.

10. The hydraulic bushing for a vehicle trailing arm according to claim 1, characterized in that: The flow channel plate is made of nylon plastic.

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