Multifunctional bushing

Abstract

The utility model provides a multifunctional bushing, which comprises a base arranged between an inner rotating shaft and an outer rotating shell, two sliding blocks, a spring and a nut, the inner rotating shaft, the base and the outer rotating shell are coaxially arranged from inside to outside, the base is sleeved on the inner rotating shaft, a gap is reserved between the outer wall of the base and the inner wall of the outer rotating shell, the number of the sliding blocks is two, and the spring is arranged between the sliding blocks and the nut. The sliding blocks are inserted between the base and the outer rotating shell from the two ends, the outer sides of the sliding blocks are each sleeved with a spring, and the outer portions of the springs are connected to nuts on the base in a threaded mode for limiting. The contact force is adjusted through movement of the parts, and the torque is prevented from being too large; the compression amount of the spring is adjusted by rotating the nut, the pressure of the end face of the spring is changed, then the contact force, the friction damping and the friction damping between parts are adjusted, the method is easy and convenient to operate and can be used for test verification, the process of manufacturing different test samples according to different friction damping in the test process is avoided, the test cost is saved, and the test efficiency is improved. And the test period is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of protective sleeves, in particular to a multifunctional bushing for connecting rotating components. Background Art

[0002] A bushing, also known as a shaft sleeve, is often installed between a shaft and a hole. The conventional shape is a cylindrical lining or sleeve, generally made of materials with relatively low stiffness such as rubber and plastic. The functions of a bushing are generally as follows: (1) Reducing friction: By providing a smooth surface for moving components, the bushing can reduce the friction between moving components, reduce component wear, and extend the service life. For example, in a steering mechanism, the bushing can reduce the friction between the steering column and the connecting rod to ensure smooth movement between the two. (2) Providing frictional damping between moving components: Helping to dampen vibration and absorb shock, making the components operate more smoothly and quietly. For example, in an automotive suspension system, bushings are used in control arms, shock absorbers, and anti-roll bars to absorb road shocks and reduce vibrations. (3) Supporting and evenly distributing loads: The bushing helps to evenly distribute the load on mechanical components, reduce stress, and prevent damage. (4) Installation alignment: The bushing can help maintain the alignment of rotating components, ensuring efficient operation and reducing the risk of mechanical failures.

[0003] Conventional bushings used in rotating components have the following disadvantages:

[0004] In order to reduce wear between moving components and provide frictional damping between moving components to dampen vibration, conventional bushings are generally made of materials with relatively low stiffness such as rubber and plastic. The thermal expansion coefficient of such bushings is much larger than that of the metal parts they are connected to. Therefore, under high-temperature working conditions, the thermal expansion of the bushing is much larger than that of the metal parts it is connected to. The bushing expands outward and presses against other parts, significantly increasing the contact force between the parts, and further increasing the frictional torque between the moving components, which hinders the normal movement between the moving components. In addition, materials such as rubber and plastic are prone to water absorption and expansion. In a high-humidity environment, the bushing will also expand as described above, resulting in an excessive frictional torque.

[0005] In a high-temperature and high-humidity environment, the expanded bushing will cause the frictional damping during component movement to be too large, causing the bushing to lose its functions of damping vibration and absorbing shock. Therefore, it is necessary to adjust the magnitude of the frictional damping provided by the bushing according to the change of the working conditions to ensure that the bushing provides the optimal frictional damping range. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is: In order to overcome the deficiencies in the prior art, the utility model provides a multifunctional bushing.

[0007] The technical solution adopted by the present utility model to solve its technical problems is as follows: A multifunctional bushing, which includes a base, a slider, a spring, and a nut disposed between an inner rotating shaft and an outer rotating shell. The inner rotating shaft, the base, and the outer rotating shell are coaxially arranged from inside to outside, and the base is sleeved on the inner rotating shaft. There is a gap between the outer wall of the base and the inner wall of the outer rotating shell. There are two sliders, which are respectively inserted between the base and the outer rotating shell from both ends. Springs are nested on the outer sides of the sliders, and the outer parts of the springs are limited by nuts threaded on the base.

[0008] Further, the base includes a spindle-shaped portion, and threaded portions are respectively provided at both ends of the spindle-shaped portion. The threaded portions are used to connect the nuts. The spindle-shaped portion includes two symmetrically arranged first conical surfaces. Conical surfaces are symmetrically machined on both sides of the spindle-shaped portion, and the end of the conical surface is a common cylindrical surface. External threads are machined on the surface of the common cylindrical surface to form the threaded portion.

[0009] Further, the base is made of plastic material and has a central hole for nesting on the inner rotating shaft.

[0010] Further, the slider is a hollow sleeve-like structure, also made of plastic material, and a second conical surface is provided on the inner wall. The inclination angle of the second conical surface matches that of the first conical surface. A conical surface adapted to the base is machined on the inner wall of the sleeve-like structure, and the external part is a common cylindrical surface adapted to the outer rotating shell.

[0011] The above-mentioned base and slider together constitute the expansion part of the bushing.

[0012] Further, the spring is a disc spring or a helical cylindrical spring.

[0013] The spring is nested between the nut and the slider, and the end abuts against the surfaces of the two components. In this embodiment, the spring is designed as a disc spring, and other forms of springs, such as helical cylindrical springs, can also be selected.

[0014] Further, a feed mark is also provided on the base, and the feed amounts of the two nuts connected to the base at both ends are the same. The two nuts are symmetrically screwed on both ends of the base, and by methods such as marking, it is strictly ensured that the feed amounts of the two nuts on the base are the same. The purpose is to ensure that the compression amounts of the two springs on both sides are the same, so that the pressures exerted by the ends of the two springs on the slider are the same, ensuring that the contact forces between the two sliders and the shell and the base are the same, and the provided frictional torques are the same.

[0015] The beneficial effects of the present utility model are as follows:

[0016] 1. Under high-temperature and high-humidity working conditions, the bushing (i.e., the base and the slider) expands, and the slider is automatically extruded to move outward along the conical surface, releasing the internal stress of the bushing, reducing the contact force between components, and avoiding excessive contact force, that is, avoiding excessive frictional torque during component rotation.

[0017] 2. The spring end face provides elastic support for the slider. Relying on the pressure of the spring end face, the contact force and frictional torque between moving parts are always maintained within a certain range, so that the frictional torque will not change significantly due to fluctuations in temperature and humidity, ensuring that the bushing provides the best frictional damping range.

[0018] 3. The frictional damping is adjustable. By rotating the nut, the compression amount of the spring is adjusted, the pressure of the spring end face is changed, and then the contact force and frictional damping between components are adjusted. The magnitude of the frictional damping is proportional to the compression amount of the spring. This method is simple and convenient to operate and can be used for test verification - verifying the working performance of components by continuously adjusting the frictional damping, avoiding the process of manufacturing different test specimens according to different frictional dampings during the test, saving the test cost and shortening the test cycle. Description of the Drawings

[0019] The following further describes the present utility model in conjunction with the drawings and embodiments.

[0020] Figure 1 It is a schematic cross-sectional structure diagram of the multifunctional bushing of the present utility model.

[0021] Figure 2 is Figure 1 The enlarged structure diagram at I in

[0022] Figure 3 It is a schematic internal structure diagram of the multifunctional bushing (excluding the outer rotating shell).

[0023] Figure 4 is Figure 3 The schematic side structure diagram of the multifunctional bushing in

[0024] Figure 5 It is a schematic three-dimensional structure diagram of the base.

[0025] Figure 6 It is a schematic cross-sectional structure diagram of the base.

[0026] Figure 7 It is a schematic three-dimensional structure diagram of the slider.

[0027] Figure 8 It is a schematic cross-sectional structure diagram of the slider.

[0028] Figure 9 It is a simulation effect diagram of the rotating component provided with the multifunctional bushing.

[0029] In the figure: 1. Base, 1.1 Threaded part, 1.2 Spindle part, 1.3 First conical surface, 1.4 Central opening, 2. Slider, 2.1 Second conical surface, 3. Spring, 4. Nut, 5. Inner rotating shaft, 6. Outer rotating shell. Detailed Embodiment

[0030] The present utility model will now be described in further detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner. Therefore, they only show the components related to the present utility model, and directions and references (such as up, down, left, right, etc.) can only be used to assist in the description of the features in the drawings. Therefore, the following specific embodiments are not adopted in a restrictive sense, and the scope of the claimed subject matter is only defined by the appended claims and their equivalent forms.

[0031] As Figures 1 - 4 shown, a multifunctional bushing of the present utility model includes a base 1, a slider 2, a spring 3, and a nut 4 disposed between an inner rotating shaft 5 and an outer rotating shell 6. The inner rotating shaft 5, the base 1, and the outer rotating shell 6 are coaxially arranged from the inside to the outside, and the base 1 is sleeved on the inner rotating shaft 5. There is a gap between the outer wall of the base 1 and the inner wall of the outer rotating shell 6. There are two sliders 2, which are respectively inserted between the base 1 and the outer rotating shell 6 from both ends. A spring 3 is nested on the outside of each slider 2, and the outside of the spring 3 is limited by a nut 4 threadedly connected to the base 1. As Figure 2 shown, the spring 3 is a disc spring or a helical cylindrical spring. The spring 3 is nested between the nut 4 and the slider 2, and the end abuts against the surfaces of the two components. In this embodiment, the spring 3 is designed as a disc spring, and other forms of springs, such as helical cylindrical springs, can also be selected.

[0032] As Figure 5 and Figure 6 shown, the base 1 includes a spindle-shaped portion 1.2, and a section of threaded portion 1.1 is provided at each end of the spindle-shaped portion 1.2. The threaded portion 1.1 is used to connect the nut 4. The spindle-shaped portion 1.2 includes two first tapered surfaces 1.3 symmetrically arranged. Tapered surfaces are symmetrically machined on both sides of the spindle-shaped portion 1.2, and the end of the tapered surface is a common cylindrical surface, and an external thread is machined on the surface of the common cylindrical surface to form the threaded portion 1.1. The base 1 is made of a plastic material and has a central opening 1.4 for nesting on the inner rotating shaft 5.

[0033] As Figure 7 and Figure 8 shown, the slider 2 is a hollow sleeve-shaped structure, and a second tapered surface 2.1 is provided on the inner wall. The inclination angle of the second tapered surface 2.1 matches that of the first tapered surface 1.3. A tapered surface adapted to the base 1 is machined on the inner wall of the sleeve-shaped structure, and the outside is a common cylindrical surface adapted to the outer rotating shell 6.

[0034] Furthermore, a feed mark is also provided on the base 1, and the feed amounts of the two end nuts 4 connected to the base 1 are the same. The two nuts 4 are symmetrically screwed at both ends of the base 1, and the feed amounts of the two nuts 4 on the base 1 are strictly ensured to be the same by means of marking or the like. The purpose is to ensure that the compression amounts of the two side springs 3 are the same, so that the pressures applied by the ends of the two side springs 3 to the slider 2 are the same, ensuring that the contact forces between the two sliders 2 and the outer rotating shell 6 and the base 1 are the same, and the provided frictional torques are the same.

[0035] Working principle:

[0036] Under normal working conditions, under the action of the pressure at the end of the spring 3, the slider 2 is in close contact with the outer rotating shell 6 and the base 1, and the slider 2 and the base 1 provide radial support for the inner rotating shaft 5 and the outer rotating shell 6. When the outer rotating shell 6 and the inner rotating shaft 5 have relative movement, the contact force between the parts provides frictional damping for the outer rotating shell 6 and the inner rotating shaft 5.

[0037] As Figure 9 shown, under high-temperature and high-humidity working conditions, the bushing (i.e., the base 1 and the slider 2) expands, and the slider 2 is automatically pushed to move outward along the conical surface under extrusion, releasing the internal stress of the bushing and reducing the contact force between the parts, avoiding excessive contact force, that is, avoiding excessive frictional torque when the parts rotate. The end face of the spring 3 provides elastic support for the slider 2. Relying on the pressure of the end face of the spring 3, the contact force and frictional torque between the moving parts are always kept within a certain range, so that the frictional torque will not change greatly due to fluctuations in temperature and humidity, ensuring that the bushing provides the best frictional damping range.

[0038] The frictional damping is adjustable. By rotating the nut 4, the compression amount of the spring 3 is adjusted, the pressure of the end face of the spring 3 is changed, and thus the contact force and frictional damping between the parts are adjusted. The magnitude of the frictional damping is proportional to the compression amount of the spring 3. This method is simple and convenient to operate and can be used for test verification - by continuously adjusting the frictional damping to verify the working performance of the parts, avoiding the process of manufacturing different test samples according to different frictional dampings during the test process, saving the test cost and shortening the test cycle.

[0039] Inspired by the above ideal embodiments of the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the scope of the present invention. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A multifunctional bushing, characterized in that: It includes a base, a slider, a spring and a nut arranged between the inner rotating shaft and the outer rotating shell. The inner rotating shaft, the base and the outer rotating shell are coaxially arranged from the inside to the outside, and the base is sleeved on the inner rotating shaft. There is a gap between the outer wall of the base and the inner wall of the outer rotating shell. There are two sliders, which are inserted between the base and the outer rotating shell from both ends respectively. A spring is nested on the outside of the slider, and the outside of the spring is limited by a nut on the base through a threaded connection.

2. The multifunctional bushing according to claim 1, characterized in that: The base includes a shuttle-shaped portion, and two ends of the shuttle-shaped portion are respectively provided with a threaded portion, the threaded portion is used to connect the nut, and the shuttle-shaped portion includes two first conical surfaces that are symmetrically arranged.

3. The multifunctional bushing according to claim 2, characterized in that: The base is made of plastic material and has a hole in the center.

4. The multifunctional bushing according to claim 2, characterized in that: The sliding block is a hollow sleeve-shaped structure, and a second conical surface is provided on the inner wall, and the inclination angle of the second conical surface matches the first conical surface.

5. The multifunctional bushing according to claim 3, characterized in that: The spring is a butterfly spring or a spiral cylindrical spring.

6. The multifunctional bushing according to claim 1, characterized in that: The base is also provided with a feed mark, and the feed amounts of the nuts at both ends connected to the base are the same.

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