Double-limiting high-response reducing bush

Abstract

The utility model relates to a double limit high response reducing bushing, including inner core, rubber layer and outer tube, rubber layer includes main part, first collision block body and second collision block body, main part is wrapped on the outer peripheral surface of inner core, first collision block body is connected to the first end face of main part, second collision block body is connected to the second end face of main part, and the outer tube is connected to the first end face of main part. The outer pipe wraps the peripheral face of the main body and is connected with the end face of the first collision block body, and a gap is formed between the outer pipe and the second collision block body. The first collision block body comprises a first limiting part extending in the radial direction of the main body, and the outer pipe is connected with the end face of the first limiting part. The second collision block body comprises a second limiting part extending in the radial direction of the main body. The second limiting part comprises a first step part and a second step part, and the main body and the second step part are connected to the two sides of the first step part respectively. According to the utility model, impact and vibration can be absorbed more quickly during acceleration and braking, so that the comfort is better improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a double-limit high-response reduced-diameter bushing. Background Art

[0002] With the glorious development of the automobile industry over the past century and the improvement of people's living standards, more and more attention has been paid to the comfort performance of vehicles during driving.

[0003] The advantages of reducing the diameter of rubber bushings used in automobiles are: first, it improves product durability. After vulcanization, the rubber shrinks as it cools, creating a secure bond between the rubber, the inner core, and the outer tube. This leaves no room for the rubber to shrink, resulting in tensile stress between its molecules. When the bushing is subjected to external loads during operation, the tensile stress on one side is relaxed while the tensile stress on the other side increases. When the tensile stress exceeds the rubber's inherent strength, the chemical bonds between the molecules break, cracking the rubber bushing and causing premature failure. If the outer tube is radially compressed after vulcanization, a certain amount of compressive stress is pre-existing between the rubber molecules. When the bushing is subjected to external loads during operation, the compressive stress on one side increases while the stress on the other side decreases or returns to a free state. Furthermore, the pre-compression factor, which is set initially in the design, prevents the bushing from experiencing tensile stress during operation. Generally, rubber materials have a much higher resistance to compression than to tension. Therefore, applying a certain amount of radial compression to the bushing can prevent premature failure and improve its durability. Secondly, radial compression can increase the radial stiffness of the product while reducing the axial stiffness. This allows for fine-tuning of the product's stiffness, which is helpful for structural adjustments. Designing the rubber bushing as a closed-end design also helps reduce manufacturing steps and helps control costs.

[0004] The performance of existing rubber bushings in absorbing shock and vibration still has room for improvement. Summary of the Invention

[0005] The purpose of the utility model is to provide a double-limit high-response reduced-diameter bushing which can absorb shock and vibration more quickly during acceleration and braking, thereby better improving comfort.

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

[0007] A double-limit high-response reducing bushing includes an inner core, a rubber layer and an outer tube, the rubber layer includes a main body, a first collision block body and a second collision block body, the main body is covered on the outer peripheral surface of the inner core, the first collision block body is connected to the first end face of the main body, the second collision block body is connected to the second end face of the main body, the outer tube is covered on the outer peripheral surface of the main body and the outer tube is connected to the end face of the first collision block body, and a gap is formed between the outer tube and the second collision block body.

[0008] The first collision block body includes a first limiting portion extending along the radial direction of the main body, and the outer tube is connected to the end surface of the first limiting portion.

[0009] The second collision block includes a second limiting portion extending along the radial direction of the main body.

[0010] The second limiting portion includes a first step portion and a second step portion. The main body and the second step portion are respectively connected to two sides of the first step portion. The radial extension dimension of the first step portion is different from the radial extension dimension of the second step portion.

[0011] A radial extension of the first step portion is smaller than a radial extension of the second step portion.

[0012] The main body is provided with a plurality of through holes along its axial direction.

[0013] The through holes are evenly distributed on the main body.

[0014] A plurality of grooves are formed on the first end surface of the main body, and the through holes are formed at the bottoms of the grooves in a one-to-one correspondence.

[0015] The outer tube includes a tube body covering the outer peripheral surface of the main body, a wing plate connected to the tube body and extending radially outward from the tube body, and the wing plate is connected to the end surface of the first collision block body.

[0016] The inner core and the outer tube are made of aluminum alloy.

[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 can absorb shock and vibration more quickly during acceleration and braking, thereby better improving comfort and facilitating production control. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Attachment Figure 1 It is a top view schematic diagram of the double-limit high-response reducing bushing of the present utility model.

[0019] Attachment Figure 2 This is a schematic AA cross-sectional view of the double-limit high-response reducing bushing of the present utility model.

[0020] Attachment Figure 3 This is a schematic BB cross-sectional view of the double-limit high-response reducing bushing of the utility model.

[0021] In the above figures: 1, outer tube; 2, rubber layer; 3, inner core. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0023] Example 1: As shown in the attached Figure 1 To the attached Figure 3 As shown, a double-limit high-response reducing bushing includes an inner core 3, a rubber layer 2 and an outer tube 1.

[0024] The inner core 3 is a round tube made of high-strength aluminum alloy, which can meet the requirements of the pressing force and has good corrosion resistance. The rubber layer 2 is set on the outer periphery of the inner core 3 and uses a high-hardness and high-damping natural rubber formula to better absorb shock and vibration. The rubber layer 2 includes a main body, a first collision block and a second collision block. The main body is covered on the outer periphery of the inner core 3, mainly located in the middle. The first collision block is connected to the first end face of the main body (corresponding to Figure 2 The right side and Figure 3 The upper end face of the second collision block is connected to the second end face of the main body (corresponding to the upper end face of the second collision block). Figure 2 The left end face and Figure 3 The outer tube 1 is also made of high-strength aluminum alloy to meet the required crushing force during use. It wraps around the outer circumference of the main body and connects to the end face of the first impact block, forming a gap between the outer tube 1 and the second impact block.

[0025] In this embodiment, the specific structure of the rubber layer 2 is as follows: the first collision block body includes a first limiting portion, which extends radially outward from the main body, and the outer tube 1 is connected to the end face of the first limiting portion. The outer tube 1 includes a tube body wrapped around the outer circumference of the main body, a wing plate connected to the tube body and extending radially outward from the tube body, and the wing plate is connected to the end face of the first collision block body. The second collision block body includes a second limiting portion extending radially from the main body. The second limiting portion is stepped, that is, the second limiting portion includes a first step portion and a second step portion, and the main body and the second step portion are respectively connected to either side of the first step portion. The radial extension dimension of the first step portion is different from the radial extension dimension of the second step portion, and the radial extension dimension of the first step portion is generally smaller than the radial extension dimension of the second step portion. A plurality of through holes are provided on the main body, and the extension direction of the through holes is arranged along the axial direction of the main body. A plurality of grooves are provided on the first end face of the main body, and the through holes are provided at the bottom of the grooves in a one-to-one correspondence. The plurality of through holes are evenly distributed on the main body. In this embodiment, four grooves and four corresponding through holes are formed on the main body and are evenly distributed in a ring shape.

[0026] The inner core 3, rubber layer 2 and outer tube 1 are integrally formed by injection molding and vulcanization, and are subjected to a diameter reduction process after vulcanization to improve durability.

[0027] When a vehicle experiences impact and vibration during driving, the upper and lower limiters allow the bushing to quickly rebound, effectively and quickly absorbing shock and damping the impact, thereby improving comfort. The limiters also reduce response time. By reducing the available space for the rubber bumper and presetting its deformation stroke, the onset time is further shortened, achieving high bushing response and improving comfort. Closed-end rubber bushings also facilitate production control, reducing production and processing steps, and facilitating the control of production risks and costs.

[0028] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to be included in the scope of protection of the present invention.

Claims

1. A double-limit high-response reducing bushing, comprising an inner core, a rubber layer and an outer tube, characterized in that: The rubber layer includes a main body, a first collision block body and a second collision block body. The main body is covered on the outer peripheral surface of the inner core, the first collision block body is connected to the first end surface of the main body, and the second collision block body is connected to the second end surface of the main body. The outer tube is covered on the outer peripheral surface of the main body and the outer tube is connected to the end surface of the first collision block body, and a gap is formed between the outer tube and the second collision block body.

2. The double-limit high-response reducing bushing according to claim 1, characterized in that: The first collision block body includes a first limiting portion extending along the radial direction of the main body, and the outer tube is connected to the end surface of the first limiting portion.

3. The double-limit high-response reducing bushing according to claim 1, characterized in that: The second collision block includes a second limiting portion extending along the radial direction of the main body.

4. The double-limit high-response reducing bushing according to claim 3, characterized in that: The second limiting portion includes a first step portion and a second step portion. The main body and the second step portion are respectively connected to two sides of the first step portion. The radial extension dimension of the first step portion is different from the radial extension dimension of the second step portion.

5. The double-limit high-response reducing bushing according to claim 4, characterized in that: A radial extension of the first step portion is smaller than a radial extension of the second step portion.

6. The double-limit high-response reducing bushing according to claim 1, characterized in that: The main body is provided with a plurality of through holes along its axial direction.

7. The double-limit high-response reducing bushing according to claim 6, characterized in that: The through holes are evenly distributed on the main body.

8. The double-limit high-response reducing bushing according to claim 6, characterized in that: A plurality of grooves are formed on the first end surface of the main body, and the through holes are formed at the bottoms of the grooves in a one-to-one correspondence.

9. The double-limit high-response reducing bushing according to claim 1, characterized in that: The outer tube includes a tube body covering the outer peripheral surface of the main body, a wing plate connected to the tube body and extending radially outward from the tube body, and the wing plate is connected to the end surface of the first collision block body.

10. The double-limit high-response reducing bushing according to claim 1, characterized in that: The inner core and the outer tube are made of aluminum alloy.

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