Six-fulcrum suspension low-frequency shock absorber for small piston engine

Abstract

The utility model discloses a six-fulcrum suspension low-frequency shock absorber for a small piston engine, belongs to the technical field of shock absorbers, and aims to solve the problems that a traditional shock absorber is low in efficiency, insufficient in durability and limited in adaptability during use. The suspension low-frequency shock absorber comprises a connecting part, a connecting bolt assembly, a fixing shell and two pieces of metal rubber, the two pieces of metal rubber are oppositely embedded in the two ends of the connecting part to form a shock absorption body, and the shock absorption body is installed in the fixing shell through the connecting bolt assembly to form the suspension low-frequency shock absorber. The low-frequency damping device is mainly used in a small piston engine.

Description

Technical Field

[0001] The utility model belongs to the technical field of shock absorbers, and in particular relates to a six-support point suspension low-frequency shock absorber for a small piston engine. Background Art

[0002] In existing suspension systems, controlling vibration and noise is a key technical challenge. The suspension system is a key component in vehicles and machinery used to isolate vibrations generated by uneven roads or during operation. The installation and adjustment of shock absorbers are usually complicated and require precise positioning and fixing to ensure the vibration reduction effect. However, traditional suspension devices often lack flexibility and adjustment capabilities, making it difficult to adapt to changing working environments and vibration conditions. Traditional suspension systems usually include springs and shock absorbers, which may be designed with hydraulic, pneumatic or elastic materials. However, these traditional shock absorbers have some limitations, which will lead to the following three defects when used:

[0003] First point: Inefficiency: Traditional shock absorbers may not be able to effectively absorb low-frequency vibrations, causing vibration and noise to be transmitted to the vehicle or mechanical structure;

[0004] Second point: Insufficient durability: Long-term use or operation in harsh environments may cause the performance of traditional shock absorbers to deteriorate or even be damaged;

[0005] Third point: Limited adaptability: Traditional shock absorbers may have difficulty adapting to different suspension system configurations or different working environments

[0006] Therefore, in order to overcome the above-mentioned defects of traditional shock absorbers, it is very practical to develop a six-point suspension low-frequency shock absorber for small piston engines. Utility Model Content

[0007] The utility model aims to solve the problems of low efficiency, insufficient durability and limited adaptability of traditional shock absorbers during use; and further provides a six-point suspension low-frequency shock absorber for small piston engines;

[0008] A six-point suspension low-frequency vibration damper for a small piston engine includes a connecting component, a connecting bolt assembly, a fixed housing, and two metal rubbers. The two metal rubbers are mounted on opposite ends of the connecting component to form a vibration damper. The vibration damper is mounted in the fixed housing via the connecting bolt assembly to form the suspension low-frequency vibration damper.

[0009] Further, the connecting component includes a connecting sleeve and a central spacer ring. The central spacer ring is disposed at the center inside the connecting sleeve, and the outer ring wall of the central spacer ring is integrally formed with the inner ring wall of the connecting sleeve. The central spacer ring divides the interior of the connecting sleeve into two rubber mounting grooves. Each metal rubber is correspondingly disposed in one rubber mounting groove, and one end of each metal rubber is coplanar with the end face of the end where the connecting sleeve is located. The other end of each metal rubber is in close contact with one end of the central spacer ring;

[0010] Further, the connecting component further includes two connecting feet. Both connecting feet are disposed on the outer ring wall of the connecting sleeve, and each connecting foot is fixedly connected to the connecting sleeve. At least one connecting through hole is machined on each connecting foot. The connecting component is mounted on the casing of the small piston engine through the two connecting feet;

[0011] Further, the fixing housing is a "U"-shaped frame body. One jack is machined on each vertical plate of the fixing housing, and the two jacks in the fixing housing are coaxially and oppositely disposed. A nut is provided on the outer side wall of one vertical plate in the fixing housing. The nut is fixed on the corresponding vertical plate through a mounting shell, and the axis of the nut is collinear with the axis of the jack;

[0012] Further, at least two threaded through holes are machined on the outer side surface of the fixing housing. A locking bolt is inserted into each threaded through hole, and both locking bolts are threadedly detachably connected to the fixing housing. The threaded end of each locking bolt extends into the fixing housing and is in close contact with the outer ring wall of the connecting sleeve;

[0013] Further, the connecting bolt assembly includes a connecting bolt and two end washers. Each end washer is correspondingly disposed inside one vertical plate of the fixing housing, and the axis of each end washer is collinear with the axis of the jack. The damping body is disposed between the two end washers. The threaded end of the connecting bolt sequentially passes through one vertical plate in the fixing housing, one end washer, the damping body, the other end washer, the other vertical plate in the fixing housing, and the nut outside the fixing housing and extends to the outside of the nut. The threaded section of the connecting bolt is threadedly connected to the nut outside the fixing housing;

[0014] Further, the thickness of the central spacer ring is 8 mm;

[0015] Further, the metal rubber is a small metal rubber. For the metal rubber, d 1内 = 12 mm, d 1外 = 14 mm, D 1外 = 22.4 mm, D 1内=20mm, H1=7.5mm, the groove depth of the rubber installation groove is 7.5mm, the length of the connecting sleeve is 23mm, the distance from the center axis position of the connecting bolt of the series metal rubber to the fixed housing is 11.5mm, the outer ring radius of the connecting sleeve R=12.7mm, and the inner ring radius of the center spacer ring r=6mm;

[0016] Furthermore, the metal rubber is a medium-sized metal rubber, and the d 2内 =12.3mm,d 2中 =14.3mm,d 2外 =15.3mm,D 2内 =22mm,D 2外 =27mm, H2=15mm, the groove depth of the rubber installation groove is 15mm, the length of the connecting sleeve is 38mm, the distance from the center axis position of the connecting bolt of the series metal rubber to the fixed housing is 21.5mm, the outer ring radius of the connecting sleeve R=15.5mm, and the inner ring radius of the center spacer ring r=7.65mm;

[0017] Furthermore, the metal rubber (2) is a large metal rubber, the d 3内 =12.3mm,d 3中 =14.3mm,d 3外 =15.3mm,D 3内 =22mm,D 3中 =24mm,D 3外 =29mm, H3=20.5mm, the groove depth of the rubber installation groove is 20.5mm, the length of the connecting sleeve is 49mm, the distance from the center axis position of the connecting bolt of the series metal rubber to the fixed housing is 24.5mm, the outer ring radius of the connecting sleeve R=16mm, and the inner ring radius of the center spacer ring r=7.65mm;

[0018] The beneficial effects of this application compared to the prior art are as follows:

[0019] The present application provides a six-point suspension low-frequency vibration damper for a small piston engine. This structure can effectively suppress vibrations within the low-frequency range. At the same time, the low-frequency vibration damper provided by the present application is also equipped with connecting legs for connection, so that the low-frequency vibration damper can be suspended and flexibly installed on the engine casing. This suspension device composed of connecting legs has wide applicability and connection reliability. Another outstanding feature of the low-frequency vibration damper provided by the present application is that a part of the adjustment space is reserved between the fixed shell and the vibration damping body. This design not only provides room for adjustment of the size of the damper, but also improves the overall elastic modulus of the vibration damper. In addition, the low-frequency vibration damper provided by the present application can improve the durability of the vibration damper due to the double protection of the shell and the connecting parts.

[0020] The working principle of this application is that the engine casing that requires vibration isolation in a specific frequency domain is fixed to the connecting parts of the shock absorber by bolts. When the engine is in working state and causes the casing to vibrate, the two metal rubbers axially connected in series in the mounting groove of the fixing device achieve a vibration reduction effect in the low-frequency range due to their large damping coefficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the installation of the suspension low-frequency shock absorber and the engine casing described in this application;

[0022] Figure 2 This is a schematic diagram of the main view of the suspension low-frequency vibration absorber described in this application;

[0023] Figure 3 This is a side view schematic diagram of the suspension low-frequency vibration absorber described in this application;

[0024] Figure 4 This is an exploded view of the suspension low-frequency shock absorber described in this application;

[0025] Figure 5 This is a schematic diagram of the interior of the suspension low-frequency vibration absorber described in this application;

[0026] Figure 6 This is a schematic diagram of the structure of the metal rubber in the low-frequency vibration absorber of the suspension described in this application (small size);

[0027] Figure 7 This is a schematic diagram of the structure of the metal rubber in the suspension low-frequency vibration absorber described in this application (medium type);

[0028] Figure 8 This is a schematic diagram of the structure of the metal rubber in the low-frequency vibration absorber of the suspension described in this application (large);

[0029] Figure 9 This is a schematic diagram of the dimensions of the metal rubber in the low-frequency vibration absorber of the suspension described in this application (small size);

[0030] Figure 10 This is a schematic diagram of the dimensions of the metal rubber in the suspension low-frequency vibration absorber described in this application (medium size);

[0031] Figure 11 This is a schematic diagram of the dimensions of the metal rubber in the low-frequency vibration absorber of the suspension described in this application (large);

[0032] Figure 12 This is a schematic structural diagram of the connecting components in the suspension low-frequency vibration absorber described in this application;

[0033] Figure 13 This is a schematic diagram of the dimensions of the connecting components in the suspension low-frequency vibration absorber described in this application;

[0034] In the figure, 1 is a connecting component, 11 is a connecting sleeve, 12 is a center spacer ring, 13 is a connecting foot, 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 and 5 is a locking bolt. DETAILED DESCRIPTION

[0035] Specific implementation method 1: Combination Figures 1 to 13 This embodiment describes a six-point suspension low-frequency vibration damper for a small piston engine. The suspension low-frequency vibration damper includes a connecting component 1, a connecting bolt assembly 3, a fixed shell 4, and two metal rubbers 2. The two metal rubbers 2 are relatively embedded at both ends of the connecting component 1 to form a vibration damper. The vibration damper is installed in the fixed shell 4 via the connecting bolt assembly 3 to form the suspension low-frequency vibration damper.

[0036] Compared with conventional suspension devices, the suspended low-frequency vibration absorber provided in this embodiment has the outstanding feature that it adopts the design of axial series vibration absorber, which can increase the resonance frequency of the vibrating body and suppress the transmission characteristics of axial vibration in the low-frequency band. This pipeline structure can be used in practical engineering projects of low-frequency vibration reduction and isolation, and the suspended low-frequency vibration absorber provided in this application is not limited to the placement direction. As long as the suspension vibration reduction method is required and there are at least two or more fixed positions near the vibration source, the present invention can meet the requirements. It has a certain degree of universality. The metal rubber that mainly plays a vibration reduction role in this application includes but is not limited to polyurethane or other dampers with vibration reduction and adaptive installation.

[0037] Specific implementation method 2: Combination Figures 1 to 13 This embodiment differs from the first embodiment in that the connecting component 1 includes a connecting sleeve 11 and a center spacer ring 12. The center spacer ring 12 is positioned at the center of the connecting sleeve 11, and its outer ring wall is integrally formed with the inner ring wall of the connecting sleeve 11. The center spacer ring 12 divides the interior of the connecting sleeve 11 into two rubber mounting grooves, with each metal rubber 2 positioned in a corresponding rubber mounting groove. One end of each metal rubber 2 is coplanar with the end surface of the connecting sleeve 11, and the other end of each metal rubber 2 is in close contact with one end of the center spacer ring 12. The remaining components and connection method are the same as those of the first embodiment.

[0038] Specific implementation method three: Combination Figures 1 to 13 This embodiment differs from the second embodiment in that the connecting component 1 further comprises two connecting legs 13, both disposed on the outer annular wall of the connecting sleeve 11. Each connecting leg 13 is fixedly connected to the connecting sleeve 11 and has at least one connecting through-hole formed therein. The connecting component 1 is mounted on the casing of a small piston engine via the two connecting legs 13. The remaining components and connection methods are the same as those of the second embodiment.

[0039] As described in Embodiment 2 and Embodiment 3, the connecting component 1 provided in the present application simplifies the installation method of the traditional suspension shock absorber. Align the connecting through-hole position of the connecting component 1 with the lug position of the engine casing, fix the fixed housing on the engine casing using bolts, embed the metal rubber 2 into the installation slot of the connecting component 1, and connect it to the fixed housing 4 through the connecting sleeve 11. When the service life of the metal rubber reaches the limit, it is also convenient to replace.

[0040] Embodiment 4: Combining Figures 1 to 13 To illustrate this embodiment, the difference between this embodiment and Embodiment 3 is that the fixed housing 4 is a "U"-shaped frame. A jack is processed on each vertical plate of the fixed housing 4, and the two jacks in the fixed housing 4 are coaxially and oppositely arranged. A nut is provided on the outer side wall of one vertical plate of the fixed housing 4, and the nut is fixed on the corresponding vertical plate through the mounting shell, and the axis of the nut is collinear with the axis of the jack. The other components and connection methods are the same as those in Embodiment 3.

[0041] Embodiment 5: Combining Figures 1 to 13 To illustrate this embodiment, the difference between this embodiment and Embodiment 4 is that at least two threaded through-holes are processed on the outer side surface of the fixed housing 4, and a locking bolt 5 is inserted into each threaded through-hole. Both locking bolts 5 are threadedly detachable from 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 connecting sleeve 11. The other components and connection methods are the same as those in Embodiment 4.

[0042] As described in Embodiment 4 and Embodiment 5, the design of the fixed housing 4 can provide stable support and maximize the shock absorption effect. Both ends of the fixed housing 4 are penetrated by bolts, and its internal space is an installation area for connecting multiple metal rubbers 2 in series; the housing part includes more than 2 bolt holes for fastening the housing and flexibly adjusting the positions of the shock absorber and the vibration source to achieve the best shock absorption effect.

[0043] Embodiment 6: Combining Figures 1 to 13This embodiment differs from the fifth embodiment in that the connecting bolt assembly 3 includes a connecting bolt 31 and two end washers 32. Each end washer 32 is disposed on the inner side of a corresponding vertical plate in the fixed housing 4, and the axis of each end washer 32 is collinear with the axis of the insertion hole. A vibration damper is disposed between the two end washers 32. The threaded end of the connecting bolt 31 sequentially passes through a vertical plate in the fixed housing 4, an end washer 32, the vibration damper, the other end washer 32, the other vertical plate in the fixed housing 4, and the nut on the outside of the fixed housing 4, extending to the outside of the nut. The threaded section of the connecting bolt 31 is threadedly connected to the nut on the outside of the fixed housing 4. Other components and connection methods are the same as those in the fifth embodiment.

[0044] 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 connecting component 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.

[0045] Specific implementation method seven: combination Figures 1 to 13 This embodiment is described. The difference between this embodiment and the sixth embodiment is that the thickness of the center spacer ring 12 is 8 mm. The other components and connection methods are the same as those of the sixth embodiment.

[0046] Specific implementation method eight: combination Figures 1 to 13 This embodiment is described. The difference between this embodiment and the seventh embodiment is that the metal rubber 2 is a small metal rubber. 1内 =12mm,d 1外 =14mm, D 1外 =22.4mm, D 1内 = 20mm, H1 = 7.5mm, the rubber mounting groove depth is 7.5mm, the length of the connecting sleeve 11 is 23mm, the distance from the center axis of the connecting bolt 31 of the series metal rubber 2 to the fixed housing 4 is 11.5mm, the outer ring radius R of the connecting sleeve 11 is 12.7mm, and the inner ring radius r of the center spacer ring 12 is 6mm. The other components and connection methods are the same as those of the seventh embodiment.

[0047] Specific implementation method nine: Combination Figures 1 to 13 This embodiment is described. The difference between this embodiment and the seventh embodiment is that the metal rubber 2 is a medium-sized metal rubber. 2内 =12.3mm,d 2中 =14.3mm,d 2外 =15.3mm,D 2内 =22mm,D 2外= 27mm, H2 = 15mm, the rubber mounting groove depth is 15mm, the length of the connecting sleeve 11 is 38mm, the distance between the center axis of the connecting bolt 31 of the series metal rubber 2 and the fixed housing 4 is 21.5mm, the outer ring radius R of the connecting sleeve 11 is 15.5mm, and the inner ring radius r of the center spacer ring 12 is 7.65mm. Other components and connection methods are the same as those in the seventh embodiment.

[0048] Specific implementation method ten: Combination Figures 1 to 13 This embodiment is described. The difference between this embodiment and the seventh embodiment is that the metal rubber 2 is a large metal rubber. 3内 =12.3mm,d 3中 =14.3mm,d 3外 =15.3mm,D 3内 =22mm,D 3中 =24mm,D 3外 =29mm, H3 = 20.5mm, the rubber mounting groove depth is 20.5mm, the length of the connecting sleeve 11 is 49mm, the distance from the center axis of the connecting bolt 31 of the series metal rubber 2 to the fixed housing 4 is 24.5mm, the outer ring radius R of the connecting sleeve 11 is 16mm, and the inner ring radius r of the center spacer ring 12 is 7.65mm. Other components and connection methods are the same as those of the seventh embodiment.

[0049] In combination with the description of the eighth and tenth embodiments, the size of the metal rubber 2 is selected mainly based on the following considerations:

[0050] First, engine power and torque: The size of the shock absorber should be matched to the maximum power and torque produced by the engine. Engines with high power and torque require larger or more powerful shock absorbers to handle the additional vibrations. In other words, the larger the metal rubber 2 size selected for an engine with higher power and torque;

[0051] Second, the number of engine cylinders and configuration: Engines with different numbers of cylinders and configurations will produce different vibration characteristics. The more cylinders an engine has, the larger the size of the metal rubber 2 selected.

[0052] Third, engine speed: The maximum engine speed will affect the design of the shock absorber. A high-speed engine may produce a higher vibration frequency. The higher the vibration frequency, the larger the size of the metal rubber 2 selected. The static knock modal test of the case in this article shows that the first-order natural frequency is 60Hz. Medium and large shock absorbers work better in this frequency range.

[0053] Fourth, installation space: The physical size of the shock absorber must adapt to the available installation space in the engine compartment. The size of the casing in this patent example is limited by the size of the engine casing, so small and medium-sized shock absorbers are suitable.

[0054] 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.

[0055] Working principle:

[0056] When the six-point suspension low-frequency vibration absorber for a small piston engine provided in the present application is in operation, the various components are first assembled, and the various vibration absorbers are installed on the target piston engine according to the design drawings. It is worth noting that the installation space and installation convenience of the vibration absorber should be fully considered during installation. Two installation modes can be selected. For the arm-type fulcrum, the threaded end of the connecting bolt 31 can be used as the connection point, and it is inserted into the arm-type fulcrum to install the vibration absorber on the target piston engine through a threaded connection. For the shell-type fulcrum, it is necessary to use the connecting through hole on the connecting leg 13 to match the corresponding threaded hole on the casing and fasten the two together with bolts to achieve the purpose of installing the vibration absorber on the target piston engine. When the suspension low-frequency vibration absorber is installed, the amplitude of the vibration generated by the piston engine during operation is transmitted to the vibration absorber through the connecting component 1 or the connecting bolt 31, and the amplitude is absorbed and attenuated by the metal rubber 2 in the vibration absorber to achieve the purpose of vibration reduction and isolation.

Claims

1. A six-point suspension low-frequency vibration absorber for a small piston engine, characterized by: The hanging low-frequency shock absorber includes a connecting component (1), a connecting bolt assembly (3), a fixed housing (4) and two metal rubbers (2). The two metal rubbers (2) are relatively installed at both ends of the connecting component (1) to form a shock-absorbing body. The shock-absorbing body is installed in the fixed housing (4) through the connecting bolt assembly (3) to form the hanging low-frequency shock absorber; The connecting component (1) includes a connecting sleeve (11) and a central spacer ring (12). The central spacer ring (12) is arranged at the center inside the connecting sleeve (11), and the outer ring wall of the central spacer ring (12) is integrally formed with the inner ring wall of the connecting sleeve (11). The central spacer ring (12) divides the interior of the connecting sleeve (11) into two rubber mounting grooves. Each metal rubber (2) is correspondingly arranged in one rubber mounting groove, and one end of each metal rubber (2) is coplanar with the end face of the end where the connecting sleeve (11) is located. The other end of each metal rubber (2) is in close contact with one end of the central spacer ring (12).

2. The six-point suspension low-frequency vibration absorber for a small piston engine according to claim 1, characterized in that: The connecting component (1) further includes two connecting feet (13). The two connecting feet (13) are both arranged on the outer ring wall of the connecting sleeve (11), and each connecting foot (13) is fixedly connected to the connecting sleeve (11). At least one connecting through hole is machined on each connecting foot (13). The connecting component (1) is installed on the casing of the small piston engine through the two connecting feet (13).

3. The six-point suspension low-frequency vibration absorber for a small piston engine according to claim 2, characterized in that: The fixed housing (4) is a "U"-shaped frame body. One jack is machined on each vertical plate of the fixed housing (4), and the two jacks in the fixed housing (4) are coaxially and oppositely arranged. A nut is provided on the outer side wall of one vertical plate in the fixed housing (4). The nut is fixed on the corresponding vertical plate through a mounting shell, and the axis of the nut is collinear with the axis of the jack.

4. The six-point suspension low-frequency vibration absorber for a small piston engine according to claim 3, characterized in that: At least two threaded through holes are machined on the outer side 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). 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 connecting sleeve (11).

5. The six-point suspension low-frequency vibration absorber for a small piston engine according to claim 4, characterized in that: The connecting bolt assembly (3) includes a connecting bolt (31) and two end washers (32). Each end washer (32) is correspondingly arranged inside one vertical plate of the fixed housing (4), and the axis of each end washer (32) is collinear with the axis of the jack. The shock-absorbing body is arranged between the two end washers (32). The threaded end of the connecting bolt (31) sequentially passes through one vertical plate in the fixed housing (4), one end washer (32), the shock-absorbing body, the other end washer (32), the other vertical plate in the fixed housing (4) and the nut outside the fixed housing (4) and extends to the outside of the nut. The threaded section of the connecting bolt (31) is threadedly connected to the nut outside the fixed housing (4).

6. The six-point suspension low-frequency vibration absorber for a small piston engine according to claim 5, characterized in that: The thickness of the central spacer ring (12) is 8 mm.

7. The six-point suspension low-frequency vibration absorber for a small piston engine according to claim 6, characterized in that: The metal rubber (2) is a small metal rubber. The metal rubber (2) has a d 1内 =12mm,d 1外 =14mm, D 1外 =22.4mm, D 1内 =20mm, H1=7.5mm, the groove depth of the rubber installation groove is 7.5mm, the length of the connecting sleeve (11) is 23mm, the distance from the central axis position of the connecting bolt (31) of the series metal rubber (2) to the fixed housing (4) is 11.5mm, the outer ring radius R of the connecting sleeve (11) is 12.7mm, and the inner ring radius r of the center spacer ring (12) is 6mm.

8. The six-point suspension low-frequency vibration absorber for a small piston engine according to claim 6, characterized in that: The metal rubber (2) is a medium-sized metal rubber, and the d 2内 =12.3mm,d 2中 =14.3mm,d 2外 =15.3mm,D 2内 =22mm,D 2外 =27mm, H2=15mm, the groove depth of the rubber installation groove is 15mm, the length of the connecting sleeve (11) is 38mm, the distance from the central axis position of the connecting bolt (31) of the series metal rubber (2) to the fixed housing (4) is 21.5mm, the outer ring radius R of the connecting sleeve (11) is 15.5mm, and the inner ring radius r of the center spacer ring (12) is 7.65mm.

9. The six-point suspension low-frequency vibration absorber for a small piston engine according to claim 6, characterized in that: The metal rubber (2) is a large metal rubber, and the d 3内 =12.3mm,d 3中 =14.3mm,d 3外 =15.3mm,D 3内 =22mm,D 3中 =24mm,D 3外 =29mm, H3=20.5mm, the groove depth of the rubber installation groove is 20.5mm, the length of the connecting sleeve (11) is 49mm, the distance from the central axis position of the connecting bolt (31) of the series metal rubber (2) to the fixed housing (4) is 24.5mm, the outer ring radius R of the connecting sleeve (11) is 16mm, and the inner ring radius r of the center spacer ring (12) is 7.65mm.

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