Damper device

Abstract

The invention belongs to the technical field of commercial vehicles, and discloses a damping device which comprises a screw rod, a damping assembly and a positioning piece, one end of the screw rod is fixed to a mounting beam, and the other end of the screw rod is connected with a first nut; the damping assembly comprises a non-return gasket and two elastic pieces, and the non-return gasket, one elastic piece, the supporting foot and the other elastic piece are sequentially arranged between the first nut and the mounting beam from top to bottom in the vertical direction. The positioning piece is arranged around the screw rod, and the check gasket abuts against the positioning piece so that the two elastic pieces can be compressed to the preset compression amount. By arranging the positioning piece, the compression amount of the elastic piece can be accurately controlled, proper pre-tightening force is provided for the vibration reduction device, influences caused by later-stage compressor installation pre-tightening are avoided, and vehicle controllability and safety are guaranteed. And by arranging the two elastic pieces, the stress finally acting on the connecting position of the screw and the mounting beam is far smaller than that in the non-attenuation state, and the service life of the damping device is greatly prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of commercial vehicles, and particularly to a shock absorption device. Background Art

[0002] With the development of commercial electric vehicles, the importance of the battery thermal management system has gradually increased. As the core component of the thermal management system, the good condition of the compressor is crucial to ensure the reliable operation of the entire battery system. However, compared with passenger vehicles, commercial vehicles generally have poor operating road conditions. Especially for various engineering vehicles such as mining trucks, the operating road conditions are even worse. The road surface is uneven in the vertical direction, and severe up-and-down bumps are common. The compressor is easily damaged under such working conditions.

[0003] In commercial vehicles, due to their harsh vibration conditions (the maximum vibration acceleration of passenger vehicles is generally about 4g in the up-and-down direction, while that of commercial vehicles can reach more than 10g), the current shock absorption solutions mainly involve installing a telescopic elastic member between the compressor and the vehicle mounting beam, and the vibration of the compressor during vehicle bumps is offset by the telescopic movement of the elastic member. However, it is difficult to control the telescopic amount of the elastic member with such shock absorption solutions, and it is difficult to ensure the driving experience. It is also found during actual field and vibration tests that the existing shock absorption solutions are extremely prone to failure problems. The failure forms are wear at the contact surface between the compressor rubber block and the compressor support feet, and pulling and tearing between the screw and the mounting beam. Summary of the Invention

[0004] The purpose of the present invention is to provide a shock absorption device that can accurately control the compression amount and absorb the upward impact force, effectively extending the service life of the shock absorption device.

[0005] To achieve this purpose, the present invention adopts the following technical solutions: A shock absorption device is applied to the thermal management system of a commercial vehicle. The commercial vehicle is provided with a mounting beam, the thermal management system includes a compressor, the compressor is located above the mounting beam, and the bottom of the compressor is provided with support feet. The shock absorption device includes a screw, a shock absorption component, and a positioning member. One end of the screw is fixed to the mounting beam, and the other end is vertically upward and connected with a first nut. The shock absorption component includes a check washer and two elastic members. The check washer, the elastic members, and the support feet are respectively provided with central holes for the screw to pass through. The check washer, one of the elastic members, the support feet, and the other elastic member are arranged in sequence from top to bottom in the vertical direction between the first nut and the mounting beam, and one of the elastic members is pressed tightly between the check washer and the support feet, and the other elastic member is pressed tightly between the support feet and the mounting beam. The positioning member is arranged around the screw and located in the central hole, and the check washer and the positioning member are in contact, so that the two elastic members are compressed to a preset compression amount.

[0006] Preferably, the thickness of the supporting leg is D, the length of the positioning member is L, and the sum of the initial heights of the two elastic members is H, satisfying: 70% ≤ (L - D) / H ≤ 90%.

[0007] Preferably, the damping device further includes a wear-resistant member, which is installed on the supporting leg and forms two annular supporting portions on both sides of the supporting leg. The supporting portions are abutted between the elastic member and the supporting leg. The outer diameter of the supporting portion is greater than or equal to the outer diameter of the elastic member, and the inner diameter of the supporting portion is less than or equal to the inner diameter of the elastic member.

[0008] Preferably, the wear-resistant member includes two wear-resistant gaskets, which are respectively located on both sides of the supporting leg. One of the wear-resistant gaskets is provided with a protruding portion passing through the central hole on the supporting leg. The protruding portion is arranged around the positioning member and is provided with a first connecting portion, and the other wear-resistant gasket is provided with a second connecting portion detachably connected to the first connecting portion.

[0009] Preferably, the protruding portion and the central hole on the supporting leg are in interference fit.

[0010] Preferably, the first connecting portion is arranged as an external thread, and the second connecting portion is arranged as a screw hole matching the external thread.

[0011] Preferably, the positioning member and the screw are integrally formed.

[0012] Preferably, the positioning member is arranged as a sleeve, and the sleeve is sleeved on the screw.

[0013] Preferably, one end of the screw away from the first nut is provided with a screw head, and the screw head is located on the side of the mounting beam away from the supporting leg and is fixedly welded to the mounting beam.

[0014] Preferably, one end of the screw away from the first nut is connected with a second nut, and the second nut is located on the side of the mounting beam away from the supporting leg and abuts against the mounting beam.

[0015] Advantages of the present invention: By providing a positioning member, when the user rotates the nut to press against the check washer, the check washer and the positioning member are brought into contact, and the elastic member can be compressed to a height equal to that of the positioning member, so that the compression amount of the elastic member can be accurately controlled, providing an appropriate pre-tightening force for the vibration damping device, not being affected by the pre-tightening during the later installation of the compressor, enabling the engineering vehicle to maintain stability in the face of complex and harsh road conditions, and avoiding problems such as abnormal noise and vibration caused by poor performance of the vibration damping device, ensuring the vehicle's controllability and safety. By providing two elastic members, which are respectively located on the upper and lower sides of the support feet of the compressor, when the vehicle jolts on a potholed road surface, the lower elastic member can absorb and buffer the downward impact force, and the upper elastic member can absorb and buffer the upward impact force, making the final stress acting on the connection between the screw and the mounting beam much smaller than the state without attenuation, avoiding the pulling and tearing of the screw and the mounting beam, and greatly extending the service life of the vibration damping device. Description of the Drawings

[0016] Figure 1 is the installation schematic diagram of the vibration damping device according to the embodiment of the present invention;

[0017] Figure 2 is the cross-sectional view of the vibration damping device according to the embodiment of the present invention;

[0018] Figure 3 is the exploded view of the vibration damping device according to the embodiment of the present invention.

[0019] In the figure: 100, screw; 110, first nut; 120, screw head; 200, vibration damping assembly; 210, check washer; 211, first central hole; 220, elastic member; 221, second central hole; 300, positioning member; 400, mounting beam; 500, support foot; 510, third central hole; 600, wear-resistant member; 610, support portion; 620, wear-resistant gasket; 621, protruding portion; 622, second connecting portion. Detailed Embodiments

[0020] The present invention will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only the parts related to the present invention are shown in the drawings, rather than all the structures.

[0021] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] In the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under", and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0023] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0024] Refer to Figures 1 to 3 As shown, a vibration damping device provided according to an embodiment of the present application is applied to a thermal management system in a commercial vehicle. The commercial vehicle is provided with a mounting beam 400. The thermal management system includes a compressor. The compressor is located above the mounting beam 400. A plurality of feet 500 are provided at the bottom of the compressor. The plurality of feet 500 are arranged at intervals along the circumference of the compressor.

[0025] The shock-absorbing devices and the supporting feet 500 are arranged in one-to-one correspondence. Each shock-absorbing device includes a screw 100, a shock-absorbing assembly 200 and a positioning member 300. One end of the screw 100 is fixed to the mounting beam 400, and the other end is arranged vertically upward and connected with a first nut 110. The shock-absorbing assembly 200 includes a check washer 210 and two elastic members 220. The check washer 210, the elastic members 220 and the supporting feet 500 are respectively provided with central holes for the screw 100 to pass through. Specifically, the check washer 210 is provided with a first central hole 211, the elastic member 220 is provided with a second central hole 221, and the supporting foot 500 is provided with a third central hole 510. The diameters of the first central hole 211 and the second central hole 221 are both smaller than the diameter of the third central hole 510. The check washer 210, one of the elastic members 220, the supporting foot 500 and the other elastic member 220 are arranged in sequence from top to bottom in the vertical direction between the first nut 110 and the mounting beam 400. That is, the screw 100 sequentially passes through the second central hole 221 of the lower elastic member 220, the third central hole 510 of the supporting foot 500, the second central hole 221 of the upper elastic member 220 and the first central hole 211 of the check washer 210 and is threadedly connected with the first nut 110. And one of the elastic members 220 abuts between the check washer 210 and the supporting foot 500, the check washer 210 abuts against the first nut, and the other elastic member 220 abuts between the supporting foot 500 and the mounting beam 400. The positioning member 300 is arranged around the screw 100 and is located in the central hole. That is, the positioning member 300 passes upward through the second central hole 221 of the lower elastic member 220, the third central hole 510 of the supporting foot 500 and the second central hole 221 of the upper elastic member 220 and abuts against the check washer 210, so that the two elastic members 220 are compressed to a preset compression amount.

[0026] If the initial pre-tightening force of the shock-absorbing device (i.e., the preset compression amount when the elastic member 220 is installed) is too small, the shock-absorbing device may become loose during operation, resulting in abnormal noise or additional vibration, affecting ride comfort and vehicle stability. If the initial pre-tightening force of the shock-absorbing device is too large, the shock-absorbing device is "too hard" and cannot effectively absorb road surface impacts, which will also affect comfort and handling performance.

[0027] It can be understood that by setting the positioning member 300, the user rotates the nut to press against the check washer 210, so that the check washer 210 abuts against the positioning member 300, and the elastic member 220 can be compressed to a height equal to that of the positioning member 300. Thus, the compression amount of the elastic member 220 can be accurately controlled, providing an appropriate pre-tightening force for the shock-absorbing device, not affected by the later installation pre-tightening of the compressor, enabling the engineering vehicle to remain stable in the face of complex and harsh road conditions, avoiding problems such as abnormal noise and vibration caused by poor performance of the shock-absorbing device, and ensuring vehicle handling performance and safety.

[0028] By providing two elastic members 220, which are respectively located on the upper and lower sides of the feet 500 of the compressor. When the vehicle jolts on a potholed road surface, the lower elastic member 220 can absorb and buffer the downward impact force, and the upper elastic member 220 can absorb and buffer the upward impact force, so that the stress finally acting on the connection between the screw 100 and the mounting beam 400 is much smaller than the state without attenuation, avoiding the pull-off and tearing of the screw 100 and the mounting beam 400, and greatly extending the service life of the vibration damping device.

[0029] It should be noted that the elastic member 220 can be a hollow rubber block or a spring. Users can choose the appropriate material of the elastic member 220 according to actual needs and costs, which will not be elaborated here. The vibration damping device can be applied not only to the feet 500 of the compressor, but also to other components of the thermal management system, such as large-mass components like water pumps, which will not be elaborated here.

[0030] Further, the thickness of the feet 500 is D, the length of the positioning member 300 is L, and the sum of the initial heights of the two elastic members 220 is H, satisfying: 70% ≤ (L - D) / H ≤ 90%.

[0031] After the first nut 110 presses down the check washer 210 and abuts against the positioning member 300, the two elastic members 220 are compressed to the preset compression amount. Define the preset compression amount of the elastic member 220 as δ (the two elastic members 220 can be approximately regarded as a large elastic member 220 in series, and the compression amount δ is the compression amount of this large elastic member 220), then δ satisfies: δ + L = H + D. By equivalently transforming the above formula, we get: L - D = H - δ, that is, L - D is the total height of the two elastic members 220 after being compressed to the preset compression amount. Substitute L - D = H - δ into 70% ≤ (L - D) / H ≤ 90% and make an equivalent transformation to get: 10% ≤ δ / H ≤ 30%.

[0032] By limiting the length of the positioning member 300, the compression amount of the elastic member 220 can be accurately controlled, eliminating the height-preload force test and comparison steps of the elastic member 220, and effectively reducing the design cost and assembly cost of the vibration damping device. Limiting the ratio of the length of the positioning member 300 minus the thickness of the feet 500 to the total height of the elastic member 220 to less than 90%, that is, limiting the ratio of the compression amount of the elastic member 220 to the total height to more than 10%, enables the elastic member 220 to have sufficient preload force to provide buffering in the up and down directions, avoiding the vibration damping device from being "too soft", and further avoiding vibration and abnormal noise during the operation of the vibration damping device; limiting the ratio of the length of the positioning member 300 minus the thickness of the feet 500 to the total height of the elastic member 220 to more than 70%, that is, limiting the ratio of the compression amount of the elastic member 220 to the total height to less than 30%, enables the elastic member 220 to have a certain deformation margin, avoiding the vibration damping device from being "too hard", and further avoiding the stiffness of the vibration damping device during operation, effectively improving the driving experience of users.

[0033] It should be added that the preset compression amount δ of the elastic member 220 can be set to a suitable value according to the actual road conditions faced by the commercial vehicle. Specifically, δ=F pre / k, where F pre is the preload force that the elastic member 220 needs to provide, F pre The calculation formula is: pre =(0.2~0.4)*F max , F max =m*a, where F max is the maximum dynamic load condition of commercial vehicles, F max According to the mass m (kg) of the bearing component (in this expansion and contraction, the component is the compressor) and the maximum acceleration a (g), the parameter 0.2-0.4 can be determined according to the degree of bumpiness of the road condition. The bumpier the road condition, the larger the value of the parameter 0.2-0.4. K is the stiffness of the elastic member 220. When the elastic member 220 is set as a spring, the stiffness K of the spring can be directly obtained by referring to the data. When the elastic member 220 is set as a rubber block, the stiffness K of the elastic member 220 = E*A / H, where E is the elastic modulus of the rubber block (Mpa), A is the initial area of ​​the rubber block (㎡), and H is the initial height of the rubber block (m).

[0034] Reference Figure 2 and Figure 3 As shown, it can be understood that the vibration reduction device also includes a wear-resistant part 600, and the wear-resistant part 600 is made of wear-resistant materials such as rubber and ceramics. The wear-resistant part 600 is installed on the support leg 500 and forms two annular support parts 610 on both sides of the support leg 500. The support part 610 is tightly pressed between the elastic part 220 and the support leg 500. The outer diameter of the support part 610 is greater than or equal to the outer diameter of the elastic part 220, and the inner diameter of the support part 610 is less than or equal to the inner diameter of the elastic part 220. Optionally, in some embodiments, the wear-resistant part 600 can be a C-shaped structure clamped on the edge of the support leg 500 and extending to the upper and lower sides of the third center hole 510, or it can be a patch structure installed on the upper and lower sides of the third center hole 510. The wear-resistant part 600 is provided with a fourth center hole for the screw 100 to pass through, which will not be repeated here.

[0035] The support foot 500 is produced integrally with the compressor, so in order to adapt to different engineering vehicles, the third center hole 510 on the support foot 500 is usually larger in diameter to accommodate screws 100 of different sizes. If the elastic member 220 is set as a rubber block, when the rubber block is subjected to impact compression, the portion of the rubber block projected on the horizontal plane that is located in the third center hole 510 will be squeezed into the third center hole 510, and the edge of the third center hole 510 will cut the rubber block. During the operation of the vibration reduction device, the edge of the third center hole 510 will repeatedly vibrate and cut, which will soon cause the portion of the rubber block that contacts the compressor support foot 500 to wear out and fail.

[0036] By providing the wear-resistant member 600, on the one hand, the support portion 610 formed by the wear-resistant member 600 can cover the third central hole 510 with a relatively large aperture, so that when the elastic member 220 is compressed up and down, the rubber block will not be extruded into the third central hole 510, avoiding wear and failure of the rubber block and prolonging the service life of the elastic member 220. On the other hand, since the support feet 500 are usually metal parts, during the operation of the vibration damping device, the metal support feet 500 will rub against the elastic member 220 repeatedly at the edge of the third central hole 510, causing rapid temperature rise. By providing the wear-resistant member 600, the friction between the support feet 500 and the elastic member 220 can be converted into the friction between the support feet 500 and the wear-resistant member 600, reducing the heat received by the elastic member 220 and further prolonging the service life of the elastic member 220.

[0037] Furthermore, the wear-resistant member 600 includes two wear-resistant gaskets 620, which are respectively located on both sides of the support feet 500. One of the wear-resistant gaskets 620 is provided with a protruding portion 621 passing through the central hole on the support feet 500. The protruding portion 621 is arranged around the positioning member 300 and is provided with a first connecting portion, and the other wear-resistant gasket 620 is provided with a second connecting portion 622 detachably connected to the first connecting portion. At this time, the wear-resistant member 600 is an "I"-shaped structure passing through the third central hole 510. Optionally, the first connecting portion and the second connecting portion 622 can be a convex block-groove structure, a snap structure, a spring arm snap-slot structure, etc., and multiple corresponding structures can be set, which will not be elaborated here.

[0038] Setting the wear-resistant member 600 as two wear-resistant gaskets 620 can simplify the structure of the wear-resistant member 600, facilitate user selection and assembly, effectively improve the assembly convenience of the wear-resistant member 600, and reduce the use cost of the wear-resistant member 600.

[0039] Refer to Figure 3 As shown, it can be understood that the protruding portion 621 and the central hole on the support feet 500 (i.e., the third central hole 510) are in interference fit.

[0040] Making the protruding portion 621 in interference fit with the third central hole 510, that is, the wear-resistant member 600 is in snap-fit with the support feet 500, effectively improves the installation stability of the wear-resistant member 600, reduces the friction vibration between the wear-resistant member 600 and the support feet 500, and further improves the vibration damping effect of the vibration damping device.

[0041] In some embodiments, it can be understood that the first connecting portion is set as an external thread, and the second connecting portion 622 is set as a screw hole matching the external thread.

[0042] Thread-connecting the two gaskets simplifies the connection structure between the two wear-resistant gaskets 620 and facilitates user assembly and use, further improving the loading and unloading convenience of the wear-resistant member 600.

[0043] In some embodiments, the positioning member 300 and the screw 100 are integrally formed. In other words, the positioning member 300 is an annular boss structure formed on the outer peripheral wall of the screw 100.

[0044] Setting the positioning member 300 and the screw 100 as an integrally formed part can further simplify the structure of the vibration damping device, facilitate the user to assemble the screw 100, and at the same time improve the overall strength of the positioning member 300 and the screw 100 to adapt to harsh road conditions.

[0045] In some other embodiments, the positioning member 300 is provided as a sleeve, the sleeve is sleeved on the screw 100, and the inner wall of the sleeve and the screw 100 are in clearance fit.

[0046] Setting the positioning member 300 as a sleeve can facilitate the user to load, unload and replace the positioning member 300, thereby adjusting the preset compression amount of the elastic member 220 to adapt to different types of commercial vehicles, effectively expanding the applicable range of the vibration damping device, and improving the practicability of the vibration damping device.

[0047] Referring to Figure 2 and Figure 3 As shown, it can be understood that a screw head 120 is provided at one end of the screw 100 away from the first nut 110, and the screw head 120 is located on the side of the mounting beam 400 away from the support leg 500 and is fixedly welded to the mounting beam 400.

[0048] By providing the screw head 120 and fixedly welding the screw head 120 to the mounting beam 400, the installation stability of the screw 100 can be effectively improved, and the overall strength and vibration damping effect of the vibration damping device can be ensured.

[0049] In some embodiments, a second nut is connected to one end of the screw 100 away from the first nut 110, and the second nut is located on the side of the mounting beam 400 away from the support leg 500 and abuts against the mounting beam 400.

[0050] By providing the second nut to connect the screw 100 and the mounting beam 400, on the one hand, the steering convenience of the screw 100 can be improved, facilitating the user to replace and maintain the screw 100 and reducing the later maintenance cost of the vibration damping device; on the other hand, the first nut 110 and the second nut can be of the same model, making the screw 100 have a certain symmetry, improving the interchangeability of the first nut 110 and the second nut, and reducing the production and use cost of the vibration damping device.

[0051] Obviously, the above-mentioned embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A vibration reduction device, applied to a thermal management system in a commercial vehicle, wherein the commercial vehicle is provided with a mounting beam (400), the thermal management system comprises a compressor, the compressor is located above the mounting beam (400), a support foot (500) is provided at the bottom of the compressor, and the characteristics are as follows: The vibration reduction device comprises: A screw rod (100), one end of which is fixed to the mounting beam (400), and the other end of which is vertically arranged upward and connected to a first nut (110); A vibration reduction assembly (200), comprising a non-return washer (210) and two elastic members (220), wherein the non-return washer (210), the elastic members (220) and the support leg (500) are respectively provided with a central hole for the screw rod (100) to pass through, and the non-return washer (210), one of the elastic members (220), the support leg (500) and the other elastic member (220) are arranged in sequence from top to bottom in a vertical direction between the first nut (110) and the mounting beam (400), and one of the elastic members (220) is pressed tightly between the non-return washer (210) and the support leg (500), and the other elastic member (220) is pressed tightly between the support leg (500) and the mounting beam (400); A positioning member (300) is arranged around the screw rod (100) and is located in the central hole. The non-return gasket (210) and the positioning member (300) are in abutment with each other so that the two elastic members (220) are compressed to a preset compression amount.

2. The vibration reduction device according to claim 1, characterized in that: The thickness of the support foot (500) is D, the length of the positioning member (300) is L, and the sum of the initial heights of the two elastic members (220) is H, satisfying: 70%≤(LD) / H≤90%.

3. The vibration damping device according to claim 1 or 2, characterized in that: The vibration reduction device also includes a wear-resistant part (600), which is installed on the support foot (500) and forms two annular support parts (610) on both sides of the support foot (500), and the support part (610) is tightly pressed between the elastic part (220) and the support foot (500), and the outer diameter of the support part (610) is greater than or equal to the outer diameter of the elastic part (220), and the inner diameter of the support part (610) is less than or equal to the inner diameter of the elastic part (220).

4. The vibration reduction device according to claim 3, characterized in that: The wear-resistant part (600) includes two wear-resistant gaskets (620), which are respectively located on both sides of the support leg (500), one of the wear-resistant gaskets (620) is provided with a protrusion (621) passing through the central hole on the support leg (500), the protrusion (621) is arranged around the positioning member (300) and is provided with a first connecting part, and the other wear-resistant gasket (620) is provided with a second connecting part (622) detachably connected to the first connecting part.

5. The vibration reduction device according to claim 4, characterized in that: The protrusion (621) and the center hole on the support leg (500) are interference fit.

6. The vibration reduction device according to claim 4, characterized in that: The first connection portion is configured as an external thread, and the second connection portion (622) is configured as a screw hole matching the external thread.

7. The vibration reduction device according to claim 1 or 2, characterized in that: The positioning member (300) and the screw rod (100) are integrally formed.

8. The vibration reduction device according to claim 1 or 2, characterized in that: The positioning member (300) is configured as a sleeve, and the sleeve is sleeved on the screw rod (100).

9. The vibration reduction device according to claim 1 or 2, characterized in that: A screw head (120) is provided at one end of the screw rod (100) away from the first nut (110); the screw head (120) is located on a side of the mounting beam (400) away from the support leg (500) and is welded and fixed to the mounting beam (400).

10. The vibration reduction device according to claim 1 or 2, characterized in that: A second nut is connected to one end of the screw rod (100) away from the first nut (110); the second nut is located on a side of the mounting beam (400) away from the support leg (500) and abuts against the mounting beam (400).

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