Suspension low-frequency shock absorber with axial connecting piece

Abstract

The utility model discloses a suspension low-frequency shock absorber with an axial connecting piece, relates to the technical field of shock absorbers, and aims to solve the problem that the conventional suspension low-frequency shock absorber is inconvenient to mount with a casing cantilever of a small piston engine. The suspension low-frequency shock absorber comprises a fixing sleeve, a connecting bolt assembly, a fixing shell, an axial connecting assembly and two pieces of metal rubber, the two pieces of metal rubber are oppositely embedded in the two ends of the fixing sleeve to form a shock absorption body, and the shock absorption body is installed in the fixing shell through the connecting bolt assembly to form a suspension low-frequency shock absorber body. One end of the connecting bolt assembly extends to the outer side of the fixed shell, the axial connecting assembly is arranged at the extending end of the connecting bolt assembly in a sleeving mode and detachably connected with the outer end of the fixed shell, and the suspension low-frequency shock absorber body is detachably connected with a cantilever of the small piston engine through the axial connecting assembly and the connecting bolt assembly. The damping structure is mainly used for the small piston engine.

Description

Technical Field

[0001] The utility model belongs to the technical field of vibration absorbers, and in particular relates to a suspended low-frequency vibration absorber with an axial connecting piece. Background Art

[0002] Suspension low-frequency vibration dampers are commonly used vibration damping components in small piston engines. Usually, the number of suspension low-frequency vibration dampers is determined based on the specific structure of the small piston engine casing. Most of the vibration dampers are distributed on the casing surface, but a small part of the vibration dampers are also distributed on the casing cantilever. For the suspension low-frequency vibration dampers distributed on the casing surface, the vibration damper casing and the engine casing can be fixed by bolts. However, for the suspension low-frequency vibration dampers distributed on the cantilever, since the mounting surface of the cantilever is small, it is not easy to fix directly with bolts. Generally, additional connecting brackets are required for auxiliary fixation. Considering that the installation space of the suspension low-frequency vibration damper is limited, adding connecting brackets will increase the installation cost and the difficulty of installation. Therefore, it is in line with practical needs to develop a suspension low-frequency vibration damper with an axial connector that can directly connect the vibration damper structure to the cantilever. Utility Model Content

[0003] In order to solve the problem that the existing low-frequency suspension damper is inconvenient to be mounted on the cantilever of a small piston engine casing, the utility model provides a low-frequency suspension damper with an axial connection member.

[0004] A suspension low-frequency vibration damper with an axial connection member includes a fixed sleeve, a connecting bolt assembly, a fixed housing, an axial connection assembly, and two metal rubbers. The two metal rubbers are relatively embedded at both ends of the fixed sleeve to form a vibration damper. The vibration damper is installed in the fixed housing via the connecting bolt assembly to form the main body of the suspension low-frequency vibration damper. One end of the connecting bolt assembly extends to the outside of the fixed housing. The axial connection assembly is sleeved on the extended end of the connecting bolt assembly and is detachably connected to the outer end of the fixed housing. The main body of the suspension low-frequency vibration damper is detachably connected to the cantilever of a small piston engine via the axial connection assembly and the connecting bolt assembly.

[0005] Furthermore, a positioning ring is provided at the center of the fixed sleeve, and the axis of the positioning ring is arranged collinearly with the axis of the fixed sleeve. The outer ring wall of the positioning ring and the inner ring wall of the fixed sleeve are integrally formed. Two metal rubbers are relatively embedded at both ends of the fixed sleeve, and one end of each metal rubber contacts the positioning ring, and one end of each metal rubber is arranged coplanar with one end of the corresponding sleeve.

[0006] Furthermore, the connecting bolt assembly includes a locking nut, a connecting bolt and two end washers, each end washer is correspondingly arranged on the inner side of one end wall of the fixed housing, the vibration damping body is arranged between the two end washers, the threaded end of the connecting bolt is sequentially fixed to one end wall of the housing, one end washer, the vibration damping body, the other end washer and the other end wall of the fixed housing and extends to the outside of the fixed housing, the locking nut is arranged on the outside of the other end wall of the fixed housing and is sleeved on the connecting bolt, and the connecting bolt is fastened to the fixed housing through the locking nut;

[0007] Furthermore, at least two threaded through holes are machined on the outer surface of the fixed housing, a locking bolt is inserted into each threaded through hole, and both locking bolts are threadably connected to the fixed housing, and the threaded end of each locking bolt extends into the fixed housing and is in close contact with the outer ring wall of the fixed sleeve;

[0008] Furthermore, the axial connection assembly includes a nut housing, a bottom support plate, a swing plate, a slide, a pressure plate, a bearing housing, a bearing cover, a connecting screw housing and a bearing. The nut housing is sleeved on the extended end of the connecting bolt, and the nut housing is buckled on the locking nut. The bottom end of the nut housing is detachably connected to the outer end wall of the fixed shell. The bottom support plate is sleeved on the extended end of the connecting bolt, and the bottom support plate is fixed on the top of the nut housing. One end of the swing plate is embedded in one end of the bottom support plate, and the swing plate is hinged to the bottom support plate. The inner side of the swing plate is fixed with a slide along the length extension direction of the swing plate. The pressure plate It is arranged above the bottom supporting plate, and one end of the pressure plate is slidably connected to the swing plate through a slide, a sleeve hole is processed at the top center of the pressure plate, the bearing sleeve is arranged on the top of the pressure plate, the bottom end of the bearing sleeve is fixedly connected to the top of the pressure plate, the bearing is embedded in the bearing sleeve, and the outer ring of the bearing is fixedly connected to the inner wall of the bearing sleeve, the connecting screw sleeve is inserted into the bearing, and the outer wall of the connecting screw sleeve is fixedly connected to the inner ring of the bearing, the axis of the bearing sleeve, the axis of the connecting screw sleeve and the axis of the sleeve hole are collinearly arranged, the bearing cover is buckled on the top of the bearing sleeve, and the bearing is sealed and protected by the bearing cover;

[0009] Furthermore, the slide is a U-shaped trough body, the slide is fixed to the inner side of the swing plate, and the open end of the slide is arranged away from the bottom support plate. A guide groove is processed on the inner side of each vertical portion of the slide along the longitudinal extension direction of the swing plate, and the two guide grooves in the slide are arranged parallel to each other.

[0010] Furthermore, a cover is provided on the open end of the slide, and the cover is detachably connected to the slide;

[0011] Furthermore, a sliding block is provided on one side of the pressure plate, and the sliding block and the pressure plate are integrally formed. The sliding block is embedded between the two vertical parts in the slideway. A rotating shaft is provided on each end of the sliding block. One end of the rotating shaft is fixedly connected to one end of the sliding block, and the other end of the rotating shaft extends to the guide groove in the corresponding vertical part. At least one guide wheel is mounted on the other end of the rotating shaft, and the guide wheel is connected to the guide groove in a damping rolling manner.

[0012] Furthermore, a vertical baffle is provided on the top of the connection end between the bottom supporting plate and the swing plate, and the bottom end of the vertical baffle is fixedly connected to the bottom supporting plate, and the top end of the vertical baffle extends vertically upward;

[0013] Furthermore, a horizontal baffle is provided at the bottom of the connection end between the bottom supporting plate and the swing plate, and one end of the horizontal baffle is fixedly connected to the bottom supporting plate, and the other end of the horizontal baffle extends toward an end away from the nut housing.

[0014] The beneficial effects of this application compared to the prior art are as follows:

[0015] 1. The present application proposes a suspension low-frequency vibration absorber with an axial connector. By increasing the length of the bolt structure of the suspension low-frequency vibration absorber itself, it is made to act as a plug-in component, and combined with the axial connection component as a connection mechanism with the cantilever. The axial connection component in the present application is directly integrated on the suspension low-frequency vibration absorber. Compared with the traditional auxiliary connection bracket, the advantages of the present application are: first, it occupies less space; second, it has a lower production cost; and third, it has a higher installation efficiency.

[0016] 2. The present application proposes a suspended low-frequency vibration absorber with an axial connecting part, wherein the bottom support plate and the pressure plate in the axial connecting assembly constitute a clamping component, and the connecting screw sleeve in the axial connecting assembly is used to be threadedly connected to the extension bolt in the suspended low-frequency vibration absorber, and during the process of screwing the connecting screw sleeve, the pressure plate is driven to move close to the bottom support plate to realize the clamping action, and the suspended low-frequency vibration absorber is connected to the cantilever under the action of the clamping force, thereby ensuring the reliability of the connection.

[0017] 3. This application proposes a suspension low-frequency vibration absorber with an axial connection. The axial connection component adopts a design method that is integrated with the suspension low-frequency vibration absorber, which provides a new idea for the installation between the suspension low-frequency vibration absorber and the cantilever. The research and development of this design is also conducive to increasing the market share of the product and has good economic prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main view of the suspension low-frequency vibration absorber described in this application (when not in operation);

[0019] Figure 2 This is a schematic diagram of the main view of the suspension low-frequency vibration absorber described in this application (when working);

[0020] Figure 3 This is a schematic diagram of the connection between the suspension low-frequency vibration absorber and the cantilever described in this application (during the installation process);

[0021] Figure 4 This is a schematic diagram of the connection between the suspension low-frequency vibration absorber and the cantilever described in this application (after installation and fixation);

[0022] Figure 5 This is a partial cross-sectional diagram of the suspension low-frequency vibration absorber described in this application (with the fixing sleeve removed);

[0023] Figure 6 This is a partial cross-sectional diagram of the suspension low-frequency vibration absorber described in this application (without the fixing sleeve and metal rubber);

[0024] Figure 7 This is a schematic front view of the axial connection assembly in the suspension low-frequency vibration absorber described in this application (when not in operation);

[0025] Figure 8 This is a schematic front view of the axial connection assembly in the suspension low-frequency vibration absorber described in this application (when working);

[0026] Figure 9 This is a side view schematic diagram of the axial connection assembly in the suspension low-frequency vibration absorber described in this application (when working);

[0027] Figure 10 This is a top view schematic diagram of the axial connection assembly in the suspension low-frequency vibration absorber described in this application (when working);

[0028] Figure 11 This is a top view of the axial connection assembly in the suspension low-frequency vibration absorber described in this application (with the cover removed);

[0029] Figure 12 This is a main cross-sectional diagram of the axial connection assembly in the suspension low-frequency vibration absorber described in this application (when working);

[0030] Figure 13 A top view of the intermediate pressure plate of the suspension low-frequency vibration absorber described in this application;

[0031] Figure 14 This is an exploded view of the structure of the suspension low-frequency vibration absorber described in this application;

[0032] In the figure, 1 is a fixing sleeve, 11 is a positioning ring, 2 is a metal rubber, 3 is a connecting bolt assembly, 31 is a connecting bolt, 32 is an end washer, 4 is a fixing housing, 5 is a locking bolt, 6 is an axial connecting assembly, 61 is a nut housing, 62 is a bottom support plate, 63 is a swing plate, 64 is a slideway, 65 is a cover, 66 is a pressure plate, 661 is a sliding block, 662 is a rotating shaft, 663 is a guide wheel, 67 is a bearing sleeve, 68 is a bearing pressure cover, 69 is a connecting nut sleeve, 610 is a bearing and 7 is a cantilever. DETAILED DESCRIPTION

[0033] Specific implementation method 1: Combination Figures 1 to 14 Describing this embodiment, a suspended low-frequency vibration absorber with an axial connector is provided. The suspended low-frequency vibration absorber includes a fixed sleeve 1, a connecting bolt assembly 3, a fixed shell 4, an axial connecting assembly 6 and two metal rubbers 2. The two metal rubbers 2 are relatively embedded at both ends of the fixed sleeve 1 to form a vibration damping body. The vibration damping body is installed in the fixed shell 4 through the connecting bolt assembly 3 to form the main body of the suspended low-frequency vibration absorber. One end of the connecting bolt assembly 3 extends to the outside of the fixed shell 4. The axial connecting assembly 6 is sleeved on the extended end of the connecting bolt assembly 3 and is detachably connected to the outer end of the fixed shell 4. The main body of the suspended low-frequency vibration absorber is detachably connected to the cantilever 7 of the small piston engine through the axial connecting assembly 6 and the connecting bolt assembly 3.

[0034] In this embodiment, an axial connection assembly 6 is designed on the basis of the suspended low-frequency vibration absorber, and the axial connection assembly 6 and the extension section of the connecting bolt assembly 3 are used together as a connecting component between the suspended low-frequency vibration absorber and the cantilever 7. This design simplifies the connection structure between the existing suspended low-frequency vibration absorber and the cantilever, saves installation space, improves installation efficiency, and is more economical, providing a new idea for the installation of the suspended low-frequency vibration absorber.

[0035] The core of the suspended low-frequency vibration damper provided in this application utilizes an axial series vibration damper design, which can increase the resonant frequency of the vibrating body and suppress the transmission characteristics of axial vibration in the low-frequency band. This piping structure can be used in practical low-frequency vibration reduction and isolation projects, and the suspended low-frequency vibration damper provided in this application has a certain degree of universality. The metal rubber that primarily performs the vibration reduction function in this application includes, but is not limited to, polyurethane or other dampers with vibration reduction and adaptable installation.

[0036] Specific implementation method 2: Combination Figures 1 to 14 This embodiment differs from the first embodiment in that a positioning ring 11 is centrally located within the fixed sleeve 1, with its axis collinear with the axis of the fixed sleeve 1. The outer wall of the positioning ring 11 is integrally formed with the inner wall of the fixed sleeve 1. Two metal rubbers 2 are mounted oppositely at opposite ends of the fixed sleeve 1, with one end of each metal rubber 2 contacting the positioning ring 11 and coplanar with one end of the corresponding sleeve 1. The remaining components and connection methods are identical to those of the first embodiment.

[0037] The present application limits the metal rubber 2 by the positioning ring 11 to ensure the stable arrangement of the metal rubber 2. At the same time, fixing the metal rubber 2 by the fixing sleeve 1 also improves the detachability of the metal rubber 2. When the metal rubber 2 is damaged, it is easy to replace the metal rubber 2.

[0038] Specific implementation method three: Combination Figures 1 to 14 This embodiment is described. This embodiment differs from the second embodiment in that the connecting bolt assembly 3 includes a locking nut, a connecting bolt 31, and two end washers 32. Each end washer 32 is correspondingly disposed on the inner side of one end wall of the fixed housing 4. The vibration damper is disposed between the two end washers 32. The threaded end of the connecting bolt 31 sequentially secures one end wall of the housing 4, one end washer 32, the vibration damper, the other end washer 32, and the other end wall of the fixed housing 4, extending to the outside of the fixed housing 4. The locking nut is disposed on the outside of the other end wall of the fixed housing 4 and is sleeved on the connecting bolt 31. The connecting bolt 31 is fastened to the fixed housing 4 via the locking nut. Other components and connection methods are the same as those of the second embodiment.

[0039] The connecting bolt 31 in the connecting bolt assembly 3 provided in this embodiment is an important component for connecting the metal rubber 2 in series. It is used to support the metal rubber 2 and the fixing sleeve 1. The end washer 32 included in the connecting bolt assembly 3 is a component for protecting and limiting the end of the metal rubber 2, which can ensure the installation accuracy and stability of the end washer 32. At the same time, the connecting bolt 31 also serves as an insert connected to the cantilever, and is used to cooperate with the axial connection assembly 6 to fix the shock absorber structure on the cantilever.

[0040] Specific implementation method four: Combination Figures 1 to 14 This embodiment differs from the third embodiment in that at least two threaded through-holes are machined on the outer surface of the fixed housing 4. Each threaded through-hole is inserted into a locking bolt 5. Both locking bolts 5 are detachably threadedly connected to the fixed housing 4. The threaded end of each locking bolt 5 extends into the fixed housing 4 and is in close contact with the outer annular wall of the fixed sleeve 1. The rest of the components and connection methods are the same as those of the third embodiment.

[0041] In this embodiment, the locking bolt 5 is used to fasten and fix the housing 4 and flexibly adjust the position of the vibration damper and the vibration source to achieve the best vibration damping effect.

[0042] Specific implementation method five: Combination Figures 1 to 14Describing this embodiment, the difference between this embodiment and the specific embodiment four is that the axial connection assembly 6 includes a nut housing 61, a bottom support plate 62, a swing plate 63, a slideway 64, a pressure plate 66, a bearing housing 67, a bearing pressure cover 68, a connecting nut housing 69 and a bearing 610. The nut housing 61 is sleeved on the extended end of the connecting bolt 31, and the nut housing 61 is buckled on the locking nut. The bottom end of the nut housing 61 is detachably connected to the outer end wall of the fixed housing 4. The bottom support plate 62 is sleeved on the extended end of the connecting bolt 31, and the bottom support plate 62 is fixed on the top end of the nut housing 61. One end of the swing plate 63 is embedded in one end of the bottom support plate 62, and the swing plate 63 is hinged to the bottom support plate 62. The inner side of the swing plate 63 extends along the length of the swing plate 63. A slideway 64 is fixedly connected to the bottom support plate 62. A pressure plate 66 is arranged above the bottom support plate 62, and one end of the pressure plate 66 is slidably connected to the swing plate 63 through the slideway 64. A sleeve hole is machined at the top center of the pressure plate 66. A bearing sleeve 67 is arranged on the top of the pressure plate 66. The bottom end of the bearing sleeve 67 is fixedly connected to the top of the pressure plate 66. A bearing 610 is embedded in the bearing sleeve 67, and the outer ring of the bearing 610 is fixedly connected to the inner wall of the bearing sleeve 67. A connecting screw sleeve 69 is inserted into the bearing 610, and the outer wall of the connecting screw sleeve 69 is fixedly connected to the inner ring of the bearing 610. The axis of the bearing sleeve 67, the axis of the connecting screw sleeve 69, and the axis of the sleeve hole are collinear. A bearing cover 68 is buckled onto the top of the bearing sleeve 67, and the bearing 610 is limited by the bearing cover 68. Other components and connection methods are the same as those of the fourth embodiment.

[0043] Specific implementation method six: combination Figures 1 to 14 This embodiment differs from the fourth embodiment in that the slideway 64 is a U-shaped trough, affixed to the inner side of the swing plate 63, with the open end of the slideway 64 positioned away from the bottom support plate 62. A guide groove is machined on the inner side of each vertical portion of the slideway 64 along the longitudinal direction of the swing plate 63, with the two guide grooves in the slideway 64 arranged parallel to each other. The remaining components and connection methods are the same as those of the fifth embodiment.

[0044] In combination with the specific implementation mode five to the specific practical mode six, the axial connection assembly 6 includes two parts. The first part is a fixing component composed of a nut sleeve 61 and a bottom support plate 62, which is used to install the axial connection assembly 6 on the end of the fixed shell 4, wherein the nut sleeve 61 is correspondingly matched with the locking nut in the connecting bolt assembly 3, and the outer side of the end of the fixed shell 4 is also provided with a slot structure with the nut sleeve 61, which ensures the stability of the connection between the nut sleeve 61 and the fixed shell 4. The bottom support plate 62 is located below the cantilever 7 when working, and the swing plate 63 is hinged to the bottom support plate 62. It can be horizontal and vertical relative to the bottom support plate 62. It is horizontal when the axial connection assembly 6 is not working and is in a horizontal state when the axial connection is not working. When the component 6 is working, it is in a vertical state. When the swing plate 63 is upright, the pressure plate 66 is located above the bottom support plate 62, and the initial position of the pressure plate 66 is higher than the end of the connecting bolt 31. Since the pressure plate 66 and the slide 64 are slidingly connected, the position of the pressure plate 66 can be adjusted at this time. When the connecting screw sleeve 69 above the pressure plate 66 contacts the end of the connecting bolt 31, it can be threadedly connected to the connecting bolt 31 by rotating the connecting screw sleeve 69, and continue to drive the pressure plate 66 to move close to the bottom support plate 62 under the action of the thread thrust to achieve a clamping action. In actual work, the purpose of reliably fixing the shock absorber and the cantilever is also achieved by driving the pressure plate 66 and the bottom support plate 62 to be clamped by the connecting screw sleeve 69.

[0045] Specific implementation method seven: combination Figures 1 to 14 This embodiment is described. The difference between this embodiment and the sixth embodiment is that a cover 65 is provided on the open end of the slide 64. The cover 65 is detachably connected to the slide 64. The other components and connection methods are the same as those of the sixth embodiment.

[0046] In this embodiment, a cover 65 is provided on the open end of the slideway 64 to limit the pressing plate 66 so as to prevent the pressing plate 66 from falling off from the slideway 64 when not in operation.

[0047] Specific implementation method eight: combination Figures 1 to 14 This embodiment differs from the seventh embodiment in that a sliding block 661 is provided on one side of the pressure plate 66, and the sliding block 661 is integrally formed with the pressure plate 66. The sliding block 661 is embedded between the two vertical portions of the slideway 64. Each end of the sliding block 661 is provided with a rotating shaft 662. One end of the rotating shaft 662 is fixedly connected to one end of the sliding block 661, and the other end of the rotating shaft 662 extends into a guide groove in the corresponding vertical portion. At least one guide wheel 663 is mounted on the other end of the rotating shaft 662, and the guide wheel 663 is connected to the guide groove in a damped rolling manner. The other components and connection methods are the same as those of the seventh embodiment.

[0048] Specific implementation method nine: Combination Figures 1 to 14This embodiment differs from the eighth embodiment in that a vertical baffle 611 is provided at the top of the connection between the bottom support plate 62 and the swing plate 63. The bottom end of the vertical baffle 611 is fixedly connected to the bottom support plate 62, and the top end of the vertical baffle 611 extends vertically upward. The other components and connection methods are the same as those of the eighth embodiment.

[0049] In this embodiment, the vertical baffle 611 is used to limit the swing plate 63 when it is in a vertical state, ensuring that the pressure plate 66 and the bottom support plate 62 can be arranged in parallel up and down, ensuring the accuracy of the trajectory of the pressure plate 66 when it moves downward subsequently.

[0050] Specific implementation method ten: Combination Figures 1 to 14 This embodiment differs from the ninth embodiment in that a horizontal baffle 612 is provided at the bottom of the connection between the bottom support plate 62 and the swing plate 63. One end of the horizontal baffle 612 is fixedly connected to the bottom support plate 62, and the other end of the horizontal baffle 612 extends toward the end away from the nut housing 61. The other components and connection methods are the same as those of the ninth embodiment.

[0051] In this embodiment, the vertical baffle 611 is used to limit the swing plate 63 when it is in a horizontal state, so as to prevent the swing plate 63 from swinging too much and colliding with other structures in the shock absorber.

[0052] The present invention has been disclosed as above with preferred implementation cases, but it is not intended to limit the present invention. Any technician familiar with the profession can make slight changes or modifications to the above-disclosed structures and technical contents without departing from the scope of the technical solution of the present invention. Equivalent implementation cases with equivalent changes can be made by using the above-disclosed structures and technical contents. However, any simple modifications, equivalent changes and modifications made to the above implementation cases based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

[0053] How it works

[0054] When the present application is working, first assemble the various components according to the connection relationship described in Specific Embodiments 1 to Specific Embodiments 10, set the suspended low-frequency vibration absorber in the vertical direction below the cantilever 7, and ensure that the end of the connecting bolt 31 passes through the reserved hole on the cantilever 7 and extends to the top of the cantilever 7. At this time, ensure that the bottom support plate 2 is in contact with the bottom of the cantilever 7, adjust the swing plate 63 so that it is in a vertical state with the bottom support plate 2, and ensure that the pressure plate 66 is located directly above the bottom support plate 2, as shown in FIG. Figure 3As shown, the position of the pressure plate 66 can be adjusted downward at this time. When the connecting screw sleeve 69 above the pressure plate 66 contacts the end of the connecting bolt 31, the connecting screw sleeve 69 can be rotated to achieve threaded connection with the connecting bolt 31, and the pressure plate 66 continues to be driven to move closer to the bottom support plate 62 under the action of the thread thrust. When the pressure plate 66 and the bottom support plate 62 clamp the cantilever 7, a fixed connection between the suspended low-frequency vibration absorber and the cantilever 7 is achieved. When the suspended low-frequency vibration absorber needs to be removed from the cantilever 7, the connecting screw sleeve 69 is screwed in reverse to separate it from the connecting bolt 31. When the connecting screw sleeve 69 is completely separated from the connecting bolt 31, the swing plate 63 is adjusted to a horizontal state. At this time, the disassembly of the suspended low-frequency vibration absorber is completed.

Claims

1. A suspension low-frequency vibration absorber with an axial connection, characterized in that: The suspension low-frequency vibration damper comprises a fixed sleeve (1), a connecting bolt assembly (3), a fixed housing (4), an axial connecting assembly (6), and two metal rubbers (2). The two metal rubbers (2) are relatively embedded at the two ends of the fixed sleeve (1) to form a vibration damper. The vibration damper is installed in the fixed housing (4) through the connecting bolt assembly (3) to form a main body of the suspension low-frequency vibration damper. One end of the connecting bolt assembly (3) extends to the outside of the fixed housing (4). The axial connecting assembly (6) is sleeved on the extended end of the connecting bolt assembly (3) and is detachably connected to the outer end of the fixed housing (4). The main body of the suspension low-frequency vibration damper is detachably connected to a cantilever (7) of a small piston engine through the axial connecting assembly (6) and the connecting bolt assembly (3).

2. A suspension low-frequency vibration absorber with an axial connection according to claim 1, characterized in that: A positioning ring (11) is provided at the center of the fixed sleeve (1), and the axis of the positioning ring (11) is arranged colinearly with the axis of the fixed sleeve (1). The outer ring wall of the positioning ring (11) and the inner ring wall of the fixed sleeve (1) are integrally formed. Two metal rubbers (2) are relatively embedded at the two ends of the fixed sleeve (1), and one end of each metal rubber (2) is in contact with the positioning ring (11). One end of each metal rubber (2) is arranged coplanar with one end of the corresponding sleeve (1).

3. A suspension low-frequency vibration absorber with an axial connection according to claim 2, characterized in that: The connecting bolt assembly (3) comprises a locking nut, a connecting bolt (31) and two end washers (32), each end washer (32) being correspondingly arranged on the inner side of an end wall of the fixed housing (4), and a vibration damper being arranged between the two end washers (32). The threaded end of the connecting bolt (31) sequentially fixes an end wall of the housing (4), an end washer (32), the vibration damper, the other end washer (32) and the other end wall of the fixed housing (4) and extends to the outside of the fixed housing (4). The locking nut is arranged on the outside of the other end wall of the fixed housing (4) and is sleeved on the connecting bolt (31), and the connecting bolt (31) is fastened to the fixed housing (4) through the locking nut.

4. A suspension low-frequency vibration absorber with an axial connection according to claim 3, characterized in that: At least two threaded through holes are machined on the outer surface of the fixed housing (4), a locking bolt (5) is inserted into each threaded through hole, and the two locking bolts (5) are both threadedly detachably connected to the fixed housing (4), and the threaded end of each locking bolt (5) extends into the fixed housing (4) and is in close contact with the outer ring wall of the fixed sleeve (1).

5. The suspension low-frequency vibration absorber with an axial connection according to claim 4, characterized in that: The axial connection assembly (6) includes a nut housing (61), a bottom supporting plate (62), a swing plate (63), a slideway (64), a pressure plate (66), a bearing housing (67), a bearing pressure cover (68), a connecting screw housing (69) and a bearing (610). The nut housing (61) is sleeved on the extended end of the connecting bolt (31), and the nut housing (61) is buckled on the locking nut. The bottom end of the nut housing (61) is detachably connected to the outer end wall of the fixed housing (4). The bottom supporting plate (62) is sleeved on the extended end of the connecting bolt (31), and the bottom supporting plate (62) is fixed on the top end of the nut housing (61). One end of the swing plate (63) is embedded in one end of the bottom supporting plate (62), and the swing plate (63) and the bottom supporting plate (62) are hingedly arranged. The inner side of the swing plate (63) is fixed with a slideway (64) along the length extension direction of the swing plate (63). The pressure plate (66) is arranged above the bottom supporting plate (62), and one end of the pressure plate (66) is slidably connected to the swing plate (63) through the slideway (64), and a sleeve hole is processed at the center of the top of the pressure plate (66). The bearing sleeve (67) is arranged on the top of the pressure plate (66), and the bottom end of the bearing sleeve (67) is fixedly connected to the top of the pressure plate (66). The bearing (610) is embedded in the bearing sleeve (67), and the outer ring of the bearing (610) is fixedly connected to the inner wall of the bearing sleeve (67). The connecting screw sleeve (69) is inserted into the bearing (610), and the outer wall of the connecting screw sleeve (69) is fixedly connected to the inner ring of the bearing (610). The axis of the bearing sleeve (67), the axis of the connecting screw sleeve (69) and the axis of the sleeve hole are arranged in a collinear manner. The bearing pressure cover (68) is buckled on the top of the bearing sleeve (67), and the bearing (610) is limited by the bearing pressure cover (68).

6. The suspension low-frequency vibration absorber with an axial connection according to claim 5, characterized in that: The slideway (64) is a U-shaped trough body. The slideway (64) is fixed to the inner side of the swing plate (63), and the open end of the slideway (64) is arranged away from the bottom support plate (62). A guide groove is processed on the inner side of each vertical portion of the slideway (64) along the length extension direction of the swing plate (63), and the two guide grooves in the slideway (64) are arranged parallel to each other.

7. The suspension low-frequency vibration absorber with an axial connection according to claim 6, characterized in that: A cover (65) is provided on the open end of the slideway (64), and the cover (65) is detachably connected to the slideway (64).

8. The suspension low-frequency vibration absorber with an axial connection member according to claim 7, characterized in that: A sliding block (661) is provided on one side of the pressure plate (66), and the sliding block (661) and the pressure plate (66) are integrally formed. The sliding block (661) is embedded between the two vertical parts in the slideway (64). A rotating shaft (662) is provided on each end of the sliding block (661). One end of the rotating shaft (662) is fixedly connected to one end of the sliding block (661), and the other end of the rotating shaft (662) extends to the guide groove in the corresponding vertical part. At least one guide wheel (663) is mounted on the other end of the rotating shaft (662), and the guide wheel (663) is connected to the guide groove in a damping rolling manner.

9. The suspension low-frequency vibration absorber with an axial connection according to claim 8, characterized in that: A vertical baffle (611) is provided at the top of the connection end between the bottom supporting plate (62) and the swing plate (63), and the bottom end of the vertical baffle (611) is fixedly connected to the bottom supporting plate (62), and the top end of the vertical baffle (611) extends vertically upward.

10. The suspension low-frequency vibration absorber with an axial connection member according to claim 9, characterized in that: A horizontal baffle (612) is provided at the bottom of the connection end between the bottom supporting plate (62) and the swing plate (63), and one end of the horizontal baffle (612) is fixedly connected to the bottom supporting plate (62), and the other end of the horizontal baffle (612) extends away from the end of the nut housing (61).

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