A dynamic vibration absorber capable of suppressing vibration of a vehicle body

Abstract

The application discloses a power vibration absorber capable of inhibiting frame vibration, which comprises a shell, a mass block, a first elastic element and a second elastic element, the shell is a frame type cage structure, the shell comprises a fixed frame, a movable plate and a mounting plate, the mass block is arranged in the shell and is not connected with the shell, the first elastic element and the second elastic element are arranged on the left side and the right side of the mass block respectively, and the ends, away from the mass block, of the first elastic element and the second elastic element are connected with the shell. The mass block of the application can vibrate in multiple directions instead of only vibrating in one direction, so that the application can absorb vibration in multiple directions, and the vibration absorption effect of the application is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of automotive parts, specifically to a dynamic vibration absorber that can suppress vehicle frame vibration. Background Technology

[0002] For vehicles with a chassis frame, the body assembly needs to be mounted on the chassis frame via rubber mounts. The maximum torsional and bending vibration modes of the frame are located primarily in the middle of the frame, which is also the connection point of the body mounts. As a result, torsional and bending vibrations of the frame are transmitted to the body through the mounts. Under high-speed driving conditions, this causes body resonance, which seriously affects ride comfort. The huge vibrations caused by resonance cannot be solved simply by the elastic connection of rubber mounts and vibration isolation technology.

[0003] By incorporating a dynamic vibration absorber, the energy of vibrations from the vehicle frame and body can be effectively absorbed, thereby reducing these vibrations. For example, Chinese utility model patent application number CN201822234974.2 discloses a dynamic vibration absorber, comprising a absorber body. The absorber body includes a base, a rubber block, and a fixed mass block, arranged sequentially and fixedly connected from bottom to top. The absorber body also includes an adjustable mass block detachably connected to the upper part of the fixed mass block. The upper part of the fixed mass block has a boss structure with multiple threaded holes on its side. The adjustable mass block is a hollow structure with bolt through holes on its side corresponding to the threaded holes. Connecting bolts pass through the bolt through holes on the adjustable mass block and engage with the threaded holes on the fixed mass block. This dynamic vibration absorber allows for rapid changes in the frequency of the absorber body by selecting rubber blocks of different stiffness and adjustable mass blocks of different weights. The absorber body can be repeatedly assembled and disassembled, reducing vehicle development time and costs. However, the dynamic vibration absorber provided by the aforementioned patent can only absorb vibration in one direction, and its vibration absorption performance is poor, which cannot meet the vibration reduction requirements of the frame and body. Summary of the Invention

[0004] The purpose of this invention is to provide a dynamic vibration absorber that can suppress chassis vibration, aiming to improve the problem that existing dynamic vibration absorbers can only absorb vibration in one direction, have poor vibration absorption performance, and cannot meet the vibration reduction requirements of chassis and body.

[0005] To achieve the above objectives, the present invention provides a dynamic vibration absorber capable of suppressing vehicle frame vibration, comprising:

[0006] shell;

[0007] A mass block, wherein the mass block is disposed within the outer casing but is not in contact with the outer casing;

[0008] A first elastic element and a second elastic element are respectively disposed on the left and right sides of the mass block, and the ends of the first elastic element and the second elastic element away from the mass block are connected to the outer shell.

[0009] Preferably, the outer shell is a frame-type cage structure, comprising a fixed frame, a movable plate, and a mounting plate. The fixed frame has an opening on one side for installing and removing the mass block. The movable plate is U-shaped, comprising a horizontal portion and two vertical portions at both ends of the horizontal portion. The movable plate is detachably connected to the opposite sides of the fixed frame via the two vertical portions. The horizontal portion of the movable plate blocks the opening of the fixed frame. The mounting plate comprises an L-shaped plate and a reinforcing rib plate. The reinforcing rib plate is welded to the inner corner of the L-shaped plate. The vertical portion of the L-shaped plate is detachably connected to one side of the fixed frame. The horizontal portion of the L-shaped plate has a mounting through hole for mounting the outer shell onto the longitudinal beam of the vehicle frame.

[0010] Preferably, the first elastic element and the second elastic element are each provided with a connecting plate at the end connected to the mass block. The connecting plate is provided with a connecting hole, and the two sides of the mass block are provided with threaded holes that correspond one-to-one with the connecting holes of the connecting plate. The first elastic element and the second elastic element are bolted to the mass block through the connecting plate.

[0011] Preferably, both the first and second elastic elements are cylindrical, and each has a pressure plate and a connecting shaft sharing a central axis at its end away from the mass block. The diameter of the pressure plate is larger than that of the first and second elastic elements. The outer shell has a limiting groove with the same diameter as the pressure plate on its inner wall, and the pressure plate is disposed in this limiting groove. The outer shell has a through hole for the connecting shaft to pass through, and the connecting shaft has an external thread structure. The connecting shaft is detachably connected to the outer shell by a nut.

[0012] Preferably, a rubber cushioning pad is provided on the inner side of the outer shell, which can prevent the mass block from directly colliding with the outer shell during vibration.

[0013] Preferably, the rubber cushioning pad is a rectangular plate with a central hole, and the four corners of the rubber cushioning pad are provided with rounded or chamfered structures. The mass block passes through the central hole of the rubber cushioning pad and does not contact the rubber cushioning pad. The four outer sides of the rubber cushioning pad are connected to the outer shell.

[0014] Preferably, the rubber cushioning pad is composed of two U-shaped cushioning pads, and the mating side of the two U-shaped cushioning pads is provided with mutually cooperating slots and locking blocks; the outer shell is a frame-type cage structure, the outer shell includes a fixed frame and a movable plate, the fixed frame has an opening on one side, the movable plate is U-shaped, including a horizontal part and two vertical parts at both ends of the horizontal part, the movable plate is detachably connected to the two sides opposite to the fixed frame through the two vertical parts, and the horizontal part of the movable plate blocks the opening of the fixed frame; of the two U-shaped cushioning pads, one U-shaped cushioning pad is connected to the inner wall of the horizontal part of the movable plate, and the other U-shaped cushioning pad is connected to the inner wall of the fixed frame.

[0015] Preferably, four rubber cushioning pads are provided, which are respectively disposed on the upper wall, lower wall, front wall and rear wall of the outer shell, located on the upper side, lower side, front side and rear side of the mass block, and none of the four rubber cushioning pads are in contact with the mass block.

[0016] Preferably, the rubber cushioning pad is connected to a mounting rod, and the upper wall, lower wall, front wall and rear wall of the outer shell are all provided with through holes for the mounting rod to pass through;

[0017] The mounting rod is provided with an external thread structure, and the mounting rod is connected to the outer shell by a nut;

[0018] or

[0019] The mounting rod is provided with a frustum-shaped rubber sleeve. The small diameter end of the rubber sleeve is the end of the rubber sleeve that is away from the rubber buffer pad. The diameter of the through hole provided on the outer shell for the mounting rod to pass through is larger than the outer diameter of the small diameter end of the rubber sleeve and smaller than the outer diameter of the large diameter end of the rubber sleeve. The distance between the rubber sleeve and the rubber buffer pad is equal to the thickness of the outer shell.

[0020] Preferably, the mass block is cylindrical, with a first annular hole and a second annular hole on one end face. The first annular hole and the second annular hole are arranged one inside and one outside, and both are coaxial with the mass block. A first annular cylinder and a second annular cylinder are respectively inserted into the first annular hole and the second annular hole. The outer diameter and inner diameter of the first annular cylinder are the same as the outer diameter and inner diameter of the first annular hole, and the outer diameter and inner diameter of the second annular cylinder are the same as the outer diameter and inner diameter of the second annular hole, respectively. Both the first annular cylinder and the second annular cylinder are hollow. Each outer end face is provided with an inlet and outlet that communicate with the inside of the cylinder. The inlet and outlet are circular holes with internal threads on their inner walls. The inlet and outlet are detachably connected with end caps. The wall of the first annular hole and the wall of the first annular cylinder are provided with matching grooves and strips. The wall of the second annular hole and the wall of the second annular cylinder are also provided with matching grooves and strips. The grooves and strips restrict rotation between the corresponding annular hole and the annular cylinder. The connecting plate can simultaneously press down on the first annular cylinder and the second annular cylinder.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. The mass block of the present invention can vibrate in multiple directions, rather than in one direction, which enables the present invention to absorb vibration in multiple directions and effectively improves the vibration absorption effect of the present invention.

[0023] 2. When the mass block vibrates, a certain amount of torque is borne by the pressure plate with a larger diameter, instead of all the force being transferred to the connecting shaft with a smaller diameter. This effectively avoids damage to the connecting shaft and also effectively improves the stability of the invention.

[0024] 3. The weight of the mass block in this invention is adjustable. By adjusting the weight of the mass block, the vibration absorption frequency of this invention can be adjusted, which effectively improves the applicability of this invention.

[0025] 4. The present invention is equipped with a rubber buffer pad, which can prevent the mass block from directly colliding with the outer shell during vibration, thus effectively protecting the mass block and the outer shell. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural schematic diagram of Embodiment 1 of the present invention from a forward-looking perspective;

[0027] Figure 2 This is a three-dimensional structural schematic diagram of Embodiment 1 of the present invention from a rear-view perspective;

[0028] Figure 3 This is a three-dimensional structural schematic diagram of the movable plate component in various embodiments of the present invention;

[0029] Figure 4 This is a front view of the mass block connected to the first elastic element and the second elastic element in various embodiments of the present invention;

[0030] Figure 5 This is a three-dimensional structural diagram of the mass block connected to the first elastic element and the second elastic element in Embodiment 1 of the present invention;

[0031] Figure 6 This is a three-dimensional structural schematic diagram of Embodiment 2 of the present invention;

[0032] Figure 7 This is a three-dimensional structural diagram of the mass block connected to the first elastic element and the second elastic element in Embodiments 2 and 3 of the present invention;

[0033] Figure 8 These are three-dimensional structural schematic diagrams of the mass blocks in Embodiments 2 and 3 of the present invention;

[0034] Figure 9 This is a three-dimensional structural schematic diagram of the rubber cushioning pad of Embodiment 2 of the present invention;

[0035] Figure 10 This is a three-dimensional structural schematic diagram of Embodiment 3 of the present invention;

[0036] Figure 11 This is a front view of Embodiment 3 of the present invention;

[0037] Figure 12 This is a three-dimensional structural diagram of the rubber cushioning pad of Embodiment 3 of the present invention.

[0038] Reference numerals: 1. Outer shell; 101. Fixed frame; 102. Movable plate; 103. Mounting plate; 2. Mass block; 3. First elastic element; 4. Second elastic element; 5. Connecting plate; 6. Pressure plate; 7. Connecting shaft; 8. Rubber buffer pad; 9. Mounting rod; 10. Rubber sleeve; 11. First annular cylinder; 12. Second annular cylinder; 13. Inlet / outlet; 14. End cap. Detailed Implementation

[0039] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] The following description, in conjunction with the accompanying drawings and specific embodiments, provides further details:

[0041] Example 1

[0042] A dynamic vibration absorber that can suppress frame vibration, such as Figure 1 , Figure 4 and Figure 5 As shown, it includes a shell 1, a mass block 2, a first elastic element 3, and a second elastic element 4.

[0043] like Figure 1 , Figure 2 and Figure 3 As shown, the outer shell 1 is a frame-type cage structure, including a fixed frame 101, a movable plate 102, and a mounting plate 103. The fixed frame 101 has an opening on its front side for installing and removing the mass block 2. The movable plate 102 is U-shaped, including a horizontal part and two vertical parts at both ends of the horizontal part. Connection holes are provided on the vertical parts of the movable plate 102 and on the left and right side walls of the fixed frame 101. The movable plate 102 is detachably connected to the left and right sides of the fixed frame 101 through the two vertical parts by bolts and nuts. The horizontal part of the movable plate 102 blocks the opening of the fixed frame 101. The mounting plate 103 includes an L-shaped plate part and a reinforcing rib plate part. The reinforcing rib plate part is welded to the inner corner of the L-shaped plate part and is also welded to the middle position of the L-shaped plate part. Connection holes are provided on the vertical plate of the L-shaped plate and the rear side wall of the fixing frame 101. The vertical plate of the L-shaped plate is detachably connected to the rear side wall of the fixing frame 101 by bolts and nuts. Two mounting through holes are provided on the horizontal plate of the L-shaped plate. These two mounting through holes are symmetrically arranged on both sides of the reinforcing rib plate. These two mounting through holes are used to install the outer shell 1 onto the longitudinal beam of the frame.

[0044] like Figure 1 , Figure 4 and Figure 5As shown, the mass block 2 has a cylindrical structure, and the first elastic element 3 and the second elastic element 4 have the same structure, also being cylindrical. The first elastic element 3 and the second elastic element 4 are respectively disposed on the left and right sides of the mass block 2. Each end of the first elastic element 3 and the second elastic element 4 connected to the mass block 2 is provided with a connecting plate portion 5, which has connecting holes. Threaded holes corresponding to the connecting holes of the connecting plate portion 5 are provided on both sides of the mass block 2. The first elastic element 3 and the second elastic element 4 are bolted to the mass block 2 through the connecting plate portion 5. The mass block 2, the first elastic element 3, and the second elastic element 4 share a common central axis. At the end of the first elastic element 3 and the second elastic element 4 away from the mass block 2, a pressure plate 6 and a connecting shaft 7 sharing a common central axis are provided. The diameter of the pressure plate 6 is larger than the diameter of the first elastic element 3 and the second elastic element 4. A limiting groove with the same diameter as the pressure plate 6 is provided on the inner wall of the outer shell 1 corresponding to the inner wall of the pressure plate 6, and the pressure plate 6 is disposed in this limiting groove. The outer casing 1 has a through hole for the connecting shaft 7 to pass through. The connecting shaft 7 has an external thread structure and is detachably connected to the outer casing 1 by a nut. The mass block 2 is installed in the outer casing 1 through the first elastic element 3 and the second elastic element 4, and is suspended in the air, not in contact with any part of the outer casing 1.

[0045] The working principle of this invention is as follows: The first elastic element 3 and the second elastic element 4 have specific stiffness, and the mass block 2 has a specific mass. The first elastic element 3 and the second elastic element 4 provide supporting stiffness for the mass block 2. Under the action of the supporting stiffness, the mass block 2 generates specific rigid body modal vibrations, which can be used to counteract or absorb the bending vibration of the frame. Moreover, in this invention, the vibration of the mass block 2 is not limited to vertical or horizontal vibration, but can vibrate in multiple directions, enabling the invention to absorb vibrations in multiple directions, effectively improving the vibration absorption effect and having the advantage of strong applicability. Since the pressure plate 6 is set in the limiting groove provided on the inner wall of the outer shell 1, when the mass block 2 vibrates, the pressure plate 6 with a larger diameter bears a certain amount of torque, instead of transmitting all the force to the connecting shaft 7 with a smaller diameter, which bears the load. This effectively avoids damage to the connecting shaft 7 and also effectively improves the stability of the invention.

[0046] Example 2

[0047] A dynamic vibration absorber that can suppress frame vibration, such as Figure 4 , Figure 6 and Figure 7 As shown, it includes a shell 1, a mass block 2, a first elastic element 3, a second elastic element 4, and a rubber cushioning pad 8.

[0048] like Figure 3 and Figure 6As shown, the outer shell 1 is a frame-type cage structure, including a fixed frame 101, a movable plate 102, and a mounting plate 103. The fixed frame 101 has an opening on its front side for installing and removing the mass block 2. The movable plate 102 is U-shaped, including a horizontal part and two vertical parts at both ends of the horizontal part. Connection holes are provided on the vertical parts of the movable plate 102 and on the left and right side walls of the fixed frame 101. The movable plate 102 is detachably connected to the left and right sides of the fixed frame 101 through the two vertical parts by bolts and nuts. The horizontal part of the movable plate 102 blocks the opening of the fixed frame 101. The mounting plate 103 includes an L-shaped plate part and a reinforcing rib plate part. The reinforcing rib plate part is welded to the inner corner of the L-shaped plate part and is also welded to the middle position of the L-shaped plate part. Connection holes are provided on the vertical plate of the L-shaped plate and the rear side wall of the fixing frame 101. The vertical plate of the L-shaped plate is detachably connected to the rear side wall of the fixing frame 101 by bolts and nuts. Two mounting through holes are provided on the horizontal plate of the L-shaped plate. These two mounting through holes are symmetrically arranged on both sides of the reinforcing rib plate. These two mounting through holes are used to install the outer shell 1 onto the longitudinal beam of the frame.

[0049] like Figure 7 and Figure 8 As shown, the mass block 2 has a cylindrical structure with a first annular hole and a second annular hole on one end face. The first and second annular holes are arranged one inside and one outside, and both are coaxial with the mass block 2. A first annular cylinder 11 and a second annular cylinder 12 are respectively inserted into the first and second annular holes. The outer and inner diameters of the first annular cylinder 11 are the same as the outer and inner diameters of the first annular hole, and the outer and inner diameters of the second annular cylinder 12 are the same as the outer and inner diameters of the second annular hole. Both the first and second annular cylinders 11 and 12 are hollow, and both have inlet and outlet 13 communicating with the inside of the cylinder on their outer end faces. The inlet and outlet 13 are circular holes with internal threads on their inner walls. A cap 14 is detachably connected to the inlet and outlet 13. The inlet and outlet 13 can be stepped to prevent the cap 14 from protruding to the outside of the end face of the mass block 2. The first annular hole and the first annular cylinder 11 are provided with matching grooves and strips. Similarly, the second annular hole and the second annular cylinder 12 are provided with matching grooves and strips. These grooves and strips restrict rotation between the corresponding annular hole and the annular cylinder. Appropriate amounts of liquid or liquids of different densities can be added to the first annular cylinder 11 and the second annular cylinder 12 through the inlet and outlet 13 to adjust the weight of the mass block 2. By adjusting the weight of the mass block 2, the vibration absorption frequency of the invention can be adjusted, effectively improving the applicability of the invention.

[0050] like Figure 4 and Figure 7As shown, the first elastic element 3 and the second elastic element 4 have the same structure, both being cylindrical. The first elastic element 3 and the second elastic element 4 are respectively located on the left and right sides of the mass block 2, and the mass block 2, the first elastic element 3, and the second elastic element 4 share a common central axis. Each end of the first elastic element 3 and the second elastic element 4 connected to the mass block 2 is provided with a connecting plate 5, which has connecting holes. The two sides of the mass block 2 have threaded holes corresponding to the connecting holes of the connecting plate 5, avoiding the first and second annular holes. The first elastic element 3 and the second elastic element 4 are bolted to the mass block 2 through the connecting plate 5, and the connecting plate 5 can simultaneously press down on the first annular cylinder 11 and the second annular cylinder 12. The slot and locking strip structure restricts rotation between the corresponding annular holes and the annular cylinders, and the connecting plate 5 also restricts the first annular cylinder 11 and the second annular cylinder 12 from dislodging from the corresponding annular holes, thus achieving stable placement of the first annular cylinder 11 and the second annular cylinder 12. The ends of the first elastic element 3 and the second elastic element 4 furthest from the mass block 2 are each provided with a pressure plate 6 and a connecting shaft 7 sharing a central axis. The diameter of the pressure plate 6 is larger than the diameters of the first elastic element 3 and the second elastic element 4. The inner wall of the outer shell 1 corresponding to the pressure plate 6 has a limiting groove with the same diameter as the pressure plate 6, and the pressure plate 6 is disposed in this limiting groove. The outer shell 1 has a through hole for the connecting shaft 7 to pass through. The connecting shaft 7 has an external thread structure and is detachably connected to the outer shell 1 by a nut. The mass block 2 is installed in the outer shell 1 through the first elastic element 3 and the second elastic element 4, and is suspended, not contacting any part of the outer shell 1.

[0051] like Figure 6 and Figure 9 As shown, a rubber cushioning pad 8 is disposed inside the outer casing 1. The rubber cushioning pad 8 is a rectangular plate with a central hole, which is cylindrical and has a diameter larger than that of the mass block 2. The four corners of the rubber cushioning pad 8 are rounded or chamfered. The mass block 2 passes through the central hole of the rubber cushioning pad 8 without contacting it. The four outer sides of the rubber cushioning pad 8 are connected to the outer casing 1. The rubber cushioning pad 8 can be a single, integrated structure or a separate structure composed of two U-shaped cushioning pads. The mating surfaces of the two U-shaped cushioning pads have mutually engaging slots and locking mechanisms. Of the two U-shaped cushioning pads, one U-shaped cushioning pad is connected to the inner wall of the transverse portion of the movable plate 102, and the other U-shaped cushioning pad is connected to the inner wall of the fixed frame 101. The separate structure of the rubber cushioning pad 8 allows for automatic disassembly when the movable plate 102 is removed from the fixed frame 101, making it easier to replace the mass block 2. The rubber cushioning pad 8 can prevent the mass block 2 from directly colliding with the outer shell 1 during vibration, thus effectively protecting the mass block 2 and the outer shell 1.

[0052] Example 3

[0053] A dynamic vibration absorber that can suppress frame vibration, such as Figure 4 , Figure 7 , Figure 10 and Figure 11 As shown, it includes a shell 1, a mass block 2, a first elastic element 3, a second elastic element 4, and a rubber cushioning pad 8.

[0054] like Figure 3 , Figure 10 and Figure 11 As shown, the outer shell 1 is a frame-type cage structure, including a fixed frame 101, a movable plate 102, and a mounting plate 103. The fixed frame 101 has an opening on its front side for installing and removing the mass block 2. The movable plate 102 is U-shaped, including a horizontal part and two vertical parts at both ends of the horizontal part. Connection holes are provided on the vertical parts of the movable plate 102 and on the left and right side walls of the fixed frame 101. The movable plate 102 is detachably connected to the left and right sides of the fixed frame 101 through the two vertical parts by bolts and nuts. The horizontal part of the movable plate 102 blocks the opening of the fixed frame 101. The mounting plate 103 includes an L-shaped plate part and a reinforcing rib plate part. The reinforcing rib plate part is welded to the inner corner of the L-shaped plate part and is also welded to the middle position of the L-shaped plate part. Connection holes are provided on the vertical plate of the L-shaped plate and the rear side wall of the fixing frame 101. The vertical plate of the L-shaped plate is detachably connected to the rear side wall of the fixing frame 101 by bolts and nuts. Two mounting through holes are provided on the horizontal plate of the L-shaped plate. These two mounting through holes are symmetrically arranged on both sides of the reinforcing rib plate. These two mounting through holes are used to install the outer shell 1 onto the longitudinal beam of the frame.

[0055] like Figure 7 and Figure 8As shown, the mass block 2 has a cylindrical structure with a first annular hole and a second annular hole on one end face. The first and second annular holes are arranged one inside and one outside, and both are coaxial with the mass block 2. A first annular cylinder 11 and a second annular cylinder 12 are respectively inserted into the first and second annular holes. The outer and inner diameters of the first annular cylinder 11 are the same as the outer and inner diameters of the first annular hole, and the outer and inner diameters of the second annular cylinder 12 are the same as the outer and inner diameters of the second annular hole. Both the first and second annular cylinders 11 and 12 are hollow, and both have inlet and outlet 13 communicating with the inside of the cylinder on their outer end faces. The inlet and outlet 13 are circular holes with internal threads on their inner walls. A cap 14 is detachably connected to the inlet and outlet 13. The inlet and outlet 13 can be stepped to prevent the cap 14 from protruding to the outside of the end face of the mass block 2. The first annular hole and the first annular cylinder 11 are provided with matching grooves and strips. Similarly, the second annular hole and the second annular cylinder 12 are provided with matching grooves and strips. These grooves and strips restrict rotation between the corresponding annular hole and the annular cylinder. Appropriate amounts of liquid or liquids of different densities can be added to the first annular cylinder 11 and the second annular cylinder 12 through the inlet and outlet 13 to adjust the weight of the mass block 2. By adjusting the weight of the mass block 2, the vibration absorption frequency of the invention can be adjusted, effectively improving the applicability of the invention.

[0056] like Figure 4 and Figure 7As shown, the first elastic element 3 and the second elastic element 4 have the same structure, both being cylindrical. The first elastic element 3 and the second elastic element 4 are respectively located on the left and right sides of the mass block 2, and the mass block 2, the first elastic element 3, and the second elastic element 4 share a common central axis. Each end of the first elastic element 3 and the second elastic element 4 connected to the mass block 2 is provided with a connecting plate 5, which has connecting holes. The two sides of the mass block 2 have threaded holes corresponding to the connecting holes of the connecting plate 5, avoiding the first and second annular holes. The first elastic element 3 and the second elastic element 4 are bolted to the mass block 2 through the connecting plate 5, and the connecting plate 5 can simultaneously press down on the first annular cylinder 11 and the second annular cylinder 12. The slot and locking strip structure restricts rotation between the corresponding annular holes and the annular cylinders, and the connecting plate 5 also restricts the first annular cylinder 11 and the second annular cylinder 12 from dislodging from the corresponding annular holes, thus achieving stable placement of the first annular cylinder 11 and the second annular cylinder 12. The ends of the first elastic element 3 and the second elastic element 4 furthest from the mass block 2 are each provided with a pressure plate 6 and a connecting shaft 7 sharing a central axis. The diameter of the pressure plate 6 is larger than the diameters of the first elastic element 3 and the second elastic element 4. The inner wall of the outer shell 1 corresponding to the pressure plate 6 has a limiting groove with the same diameter as the pressure plate 6, and the pressure plate 6 is disposed in this limiting groove. The outer shell 1 has a through hole for the connecting shaft 7 to pass through. The connecting shaft 7 has an external thread structure and is detachably connected to the outer shell 1 by a nut. The mass block 2 is installed in the outer shell 1 through the first elastic element 3 and the second elastic element 4, and is suspended, not contacting any part of the outer shell 1.

[0057] like Figure 10 , Figure 11 and Figure 12 As shown, four rubber cushioning pads 8 are provided, respectively located on the upper, lower, front, and rear walls of the outer casing 1, on the upper, lower, front, and rear sides of the mass block 2. The upper, lower, and rear walls of the outer casing 1 are the upper, lower, and rear walls of the fixed frame 101, and the front wall of the outer casing 1 is the transverse portion of the movable plate 102. When the mass block 2 is installed in the outer casing 1, none of the four rubber cushioning pads 8 are in contact with the mass block 2; each is at a certain distance from it. The rubber cushioning pads 8 prevent direct collision between the mass block 2 and the outer casing 1 during vibration, effectively protecting both the mass block 2 and the outer casing 1.

[0058] There are several ways to connect the rubber cushioning pad 8 to the outer shell 1, one of which is as follows: Figure 11 and Figure 12As shown, the rubber cushioning pad 8 is connected to a mounting rod 9. The upper, lower, front, and rear walls of the outer casing 1 all have through holes for the mounting rod 9 to pass through. The mounting rod 9 has a frustum-shaped rubber sleeve 10. The smaller diameter end of the rubber sleeve 10 is the end furthest from the rubber cushioning pad 8. The diameter of the through hole on the outer casing 1 for the mounting rod 9 to pass through is larger than the outer diameter of the smaller diameter end of the rubber sleeve 10 but smaller than the outer diameter of the larger diameter end of the rubber sleeve 10. The distance between the rubber sleeve 10 and the rubber cushioning pad 8 is equal to the thickness of the outer casing 1. When installing the rubber cushioning pad 8, the mounting rod 9 can be directly passed through the pre-set through hole from the inside of the outer casing 1. Alternatively, an external thread structure can be provided on the mounting rod 9, and the mounting rod 9 can be connected to the outer casing 1 by a nut.

[0059] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A dynamic vibration absorber for suppressing vehicle frame vibration, characterized in that, include: Outer shell (1); Mass block (2), the mass block (2) is disposed in the outer shell (1) and is not in contact with the outer shell (1); The first elastic element (3) and the second elastic element (4) are respectively disposed on the left and right sides of the mass block (2), and the ends of the first elastic element (3) and the second elastic element (4) away from the mass block (2) are connected to the outer shell (1). The first elastic element (3) and the second elastic element (4) are both provided with a connecting plate (5) at the end connected to the mass block (2). The connecting plate (5) is provided with a connecting hole. The two sides of the mass block (2) are provided with threaded holes that correspond one-to-one with the connecting holes of the connecting plate (5). The first elastic element (3) and the second elastic element (4) are bolted to the mass block (2) through the connecting plate (5). The mass block (2) is cylindrical, with a first annular hole and a second annular hole on one end face. The first annular hole and the second annular hole are arranged one inside and one outside, and both are coaxial with the mass block (2). A first annular cylinder (11) and a second annular cylinder (12) are respectively inserted into the first annular hole and the second annular hole. The outer diameter and inner diameter of the first annular cylinder (11) are the same as the outer diameter and inner diameter of the first annular hole, and the outer diameter and inner diameter of the second annular cylinder (12) are the same as the outer diameter and inner diameter of the second annular hole, respectively. Both the first annular cylinder (11) and the second annular cylinder (12) are hollow, and both have hollow outer end faces. The inlet and outlet (13) are connected to the inside of the cylinder. The inlet and outlet (13) are circular holes with internal threads on their inner walls. The inlet and outlet (13) are detachably connected to a cap (14). The wall of the first annular hole and the wall of the first annular cylinder (11) are provided with mutually compatible slots and strips. The wall of the second annular hole and the wall of the second annular cylinder (12) are also provided with mutually compatible slots and strips. The slots and strips restrict the rotation between the corresponding annular hole and the annular cylinder. The connecting plate (5) can press down on the first annular cylinder (11) and the second annular cylinder (12) at the same time. The first elastic element (3) and the second elastic element (4) are both cylindrical. At the end of each of them away from the mass block (2), there is a pressure plate (6) and a connecting shaft (7) that share the same central axis. The diameter of the pressure plate (6) is larger than the diameter of the first elastic element (3) and the second elastic element (4). The outer shell (1) is provided with a limiting groove on the inner side wall corresponding to the pressure plate (6) with the same diameter as the pressure plate (6). The pressure plate (6) is disposed in this limiting groove. The outer shell (1) is provided with a through hole for the connecting shaft (7) to pass through. The connecting shaft (7) is provided with an external thread structure. The connecting shaft (7) is detachably connected to the outer shell (1) by a nut. A rubber buffer pad (8) is provided on the inner side of the outer shell (1). The rubber buffer pad (8) can prevent the mass block (2) from directly colliding with the outer shell (1) during vibration. The rubber cushioning pad (8) is a rectangular plate with a central hole. The four corners of the rubber cushioning pad (8) are provided with rounded or chamfered structures. The mass block (2) passes through the central hole of the rubber cushioning pad (8) and does not connect with the rubber cushioning pad (8). The four outer sides of the rubber cushioning pad (8) are connected to the outer shell (1). or Four rubber buffer pads (8) are provided. The four rubber buffer pads (8) are respectively provided on the upper wall, lower wall, front wall and rear wall of the outer shell (1), respectively located on the upper side, lower side, front side and rear side of the mass block (2), and none of the four rubber buffer pads (8) are in contact with the mass block (2).

2. The dynamic vibration absorber according to claim 1, wherein The outer shell (1) is a frame-type cage structure. The outer shell (1) includes a fixed frame (101), a movable plate (102), and a mounting plate (103). The fixed frame (101) has an opening on one side for installing and removing the mass block (2). The movable plate (102) is U-shaped and includes a horizontal part and two vertical parts at both ends of the horizontal part. The movable plate (102) is detachably connected to the two sides opposite to the fixed frame (101) through the two vertical parts. The horizontal part of the movable plate (102) blocks the opening of the fixed frame (101). The mounting plate (103) includes an L-shaped plate and a reinforcing rib plate. The reinforcing rib plate is welded to the inner corner of the L-shaped plate. The vertical plate of the L-shaped plate is detachably connected to one side of the fixed frame (101). The horizontal plate of the L-shaped plate has a mounting through hole for installing the outer shell (1) onto the longitudinal beam of the frame.

3. The dynamic vibration absorber according to claim 1, wherein The rectangular plate-shaped rubber cushioning pad (8) is composed of two U-shaped cushioning pads. The two U-shaped cushioning pads have mutually cooperating slots and locking blocks on their mating sides. The outer shell (1) is a frame-type cage structure. The outer shell (1) includes a fixed frame (101) and a movable plate (102). The fixed frame (101) has an opening on one side. The movable plate (102) is U-shaped and includes a horizontal part and two vertical parts at both ends of the horizontal part. The movable plate (102) is detachably connected to the two sides of the fixed frame (101) opposite to the two vertical parts. The horizontal part of the movable plate (102) blocks the opening of the fixed frame (101). Of the two U-shaped cushioning pads, one U-shaped cushioning pad is connected to the inner wall of the horizontal part of the movable plate (102), and the other U-shaped cushioning pad is connected to the inner wall of the fixed frame (101).

4. The dynamic vibration absorber according to claim 1, wherein Each of the four rubber buffer pads (8) is connected to a mounting rod (9), and the upper wall, lower wall, front wall and rear wall of the outer shell (1) are provided with through holes for the mounting rod (9) to pass through. The mounting rod (9) is provided with an external thread structure, and the mounting rod (9) is connected to the outer shell (1) by a nut; or The mounting rod (9) is provided with a frustum-shaped rubber sleeve (10). The small diameter end of the rubber sleeve (10) is the end of the rubber sleeve (10) that is away from the rubber buffer pad (8). The diameter of the through hole provided on the outer shell (1) for the mounting rod (9) to pass through is larger than the outer diameter of the small diameter end of the rubber sleeve (10) and smaller than the outer diameter of the large diameter end of the rubber sleeve (10). The distance between the rubber sleeve (10) and the rubber buffer pad (8) is equal to the thickness of the outer shell (1).

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