Efficient vibration isolation lead core rubber support

By setting up a stacked rubber assembly and a wire braided mesh in the lead-core rubber support, combined with the sacrificial anode buried protection component, the existing lead-core rubber support has solved the problems of simple structure, insufficient strength and poor vibration isolation capabilities, achieving higher strength and efficient vibration isolation effects, and reducing metal corrosion.

CN222893487UActive Publication Date: 2025-05-23SHANGHAI RB RUBBER ISOLATOR TECH
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Patent Information

Application Number
CN202421006326.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-10
Publication Date
2025-05-23
Estimated Expiration
2034-05-10

AI Technical Summary

Technical Problem

The laminated rubber structure inside the existing lead-core rubber support does not have the ability to assemble and cast, and the lead-core structure inside is relatively simple, which affects the overall strength of the rubber support and does not have a wave spring wire braided mesh structure, so efficient vibration isolation cannot be achieved.

Method used

By providing a stacked rubber assembly in the lead-core rubber support, including an alternately extended stacked inner rubber layer and a vibration isolation braiding layer, and a wire braiding net is prepared between the branch pipes, and fixed wave springs are bonded to both sides to form a vibration isolation braiding layer. At the same time, the sacrificial anode buried protection assembly is used to reduce metal corrosion.

Benefits of technology

The overall strength of the rubber bearing and its adaptability to shear deformation and angle deformation are improved, efficient vibration isolation is achieved, and metal corrosion is reduced by sacrificing the anode buried protection assembly.

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Abstract

The utility model provides an efficient vibration isolation lead core rubber support which comprises a rubber support body, the rubber support body is filled with a lead core, the outer wall of the lead core is sleeved with a laminated rubber assembly, an upper sealing plate is fixed to the top end of the laminated rubber assembly, and a lower sealing plate is fixed to the bottom end of the laminated rubber assembly. A lower bottom plate and an upper bottom plate are connected to the outer walls, located on the two sides of the sealing plate, of the rubber support body, the laminated rubber assembly is sleeved with a rubber protection sleeve, and mounting holes are formed in the outer walls of the four corners of the lower bottom plate and the outer walls of the four corners of the upper bottom plate in a penetrating mode. The lead cores of the rubber support are in a branch tree shape, the overall strength of the rubber support is greatly improved, the steel wire woven net is woven on the outer wall between the branch pipes, the wave springs are attached and fixed to the outer walls of the two sides of the steel wire woven net to form the vibration isolation woven layers, and due to the arrangement of the steel wire woven net, the rubber support is stressed more evenly, and the service life of the rubber support is prolonged. The adaptability of the rubber support to shear deformation is improved, and the arrangement of the wave springs enables the rubber support to have an efficient vibration isolation effect.
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Description

Technical Field

[0001] The utility model relates to the technical field of lead rubber bearings, in particular to a high-efficiency vibration-isolating lead rubber bearing. Background Art

[0002] Lead rubber bearing is a special type of rubber bearing, which adds lead core material to the traditional rubber bearing. The lead core is mainly made of lead material, which has high density and plasticity. Lead rubber bearings are usually composed of rubber pads and lead cores, aiming to provide better shock absorption and vibration isolation effects; the advantages of lead rubber bearings are their high shock absorption performance and controllable deformation characteristics; the high density of lead can absorb and disperse large energy, and under the action of earthquakes or other impact loads, it can effectively reduce the structural stress and protect the safety of buildings, bridges or other structures; at the same time, lead rubber bearings can also control the deformation of the bearings by adjusting the number and size of lead cores to meet specific engineering needs; lead rubber bearings are widely used in highway bridges, railway tracks, important buildings and other projects to provide more effective shock absorption and vibration isolation effects; they play an important role in earthquake resistance, noise reduction, and protection of structural integrity. Lead rubber bearings are disclosed in patent: CN 204039906 U. The main technical scheme of the lead rubber bearing is as follows: an upper bearing mechanism composed of a beam bottom embedded plate and an upper connecting plate, and a lower bearing mechanism composed of a lower connecting plate. Corresponding annular cavities are arranged at the centers of the upper and lower connecting plates, and a bearing body with upper and lower sealing plates at both ends is fixed in the upper and lower annular cavities; upper and lower anchoring mechanisms are arranged between the beam bottom embedded plate and the upper connecting plate, and on the lower connecting plate, which are respectively fixed to the beam body and the bridge pier.

[0003] However, the structure of the lead rubber bearing on the market is relatively simple, the internal laminated rubber structure does not have the ability to be assembled and cast, the internal lead core structure is relatively simple, which affects the overall strength of the rubber bearing, and the lead rubber bearing does not have a wave spring wire mesh structure, so the rubber bearing does not have the ability to effectively isolate vibrations. Therefore, we have made improvements to this and proposed a highly effective vibration isolation lead rubber bearing. Summary of the invention

[0004] The purpose of the utility model is to address the problems that the laminated rubber structure inside the existing lead core rubber bearing does not have the ability to be assembled and cast, the internal lead core structure is relatively simple, which affects the overall strength of the rubber bearing, and the lead core rubber bearing does not have a wave spring steel wire woven mesh structure, so that the rubber bearing does not have the ability to effectively isolate vibrations.

[0005] In order to achieve the above-mentioned utility model purpose, the utility model provides the following technical solutions:

[0006] High-efficiency vibration isolation lead core rubber bearings are used to improve the above problems.

[0007] The specific application is as follows:

[0008] It includes a rubber bearing body, the interior of the rubber bearing body is filled with a lead core, a laminated rubber assembly is mounted on the outer wall of the lead core, an upper sealing plate is fixed to the top of the laminated rubber assembly, a lower sealing plate is fixed to the bottom of the laminated rubber assembly, the rubber bearing body is located on the outer walls on both sides of the sealing plate and is connected to a lower base plate and an upper base plate, a rubber protective sleeve is mounted on the outside of the laminated rubber assembly, mounting holes are opened on the outer walls of the four corners of the lower base plate and the upper base plate, and a sacrificial anode buried protection component is arranged on the top outer wall of the lower base plate.

[0009] As a preferred technical solution of the present application, the laminated rubber assembly includes an inner rubber layer and a vibration isolation braided layer that are alternately extended and stacked, a first connecting ring is embedded and fixed inside the inner rubber layer, a second connecting ring is embedded and fixed inside the vibration isolation braided layer, plug rods are distributed and fixed on the top outer walls of the first connecting ring and the second connecting ring, insertion holes are distributed and opened on the bottom outer walls of the first connecting ring and the second connecting ring, branch pipes are distributed and connected on the inner wall of the second connecting ring, a steel wire mesh is woven on the outer wall between the branch pipes, and wave springs are fitted and fixed on the outer walls on both sides of the steel wire mesh.

[0010] As a preferred technical solution of the present application, the sacrificial anode buried protection component includes a buried rod inserted into the mounting hole, and the buried rod is a sacrificial anode material, an electric control box is fixed on the top outer wall of the lower base plate, and a battery is fixed on the bottom inner wall of the electric control box, a power supply controller is installed on the bottom inner wall of the electric control box, and the power supply controller and the battery are electrically connected, the positive terminal of the battery is connected to a first power line, and one end of the first power line is connected to the top of the buried rod, the negative terminal of the battery is connected to a second power line, and one end of the second power line is connected to the outer walls of the lower base plate and the upper base plate, and a flexible photovoltaic panel is fittedly connected to the outer wall of the rubber protective cover, and the electrical output end of the flexible photovoltaic panel is connected to the electrical input end of the battery.

[0011] As a preferred technical solution of the present application, the first connecting ring and the second connecting ring are alternately stacked by connecting the rod and the socket, and the lead core is cast inside the first connecting ring and the second connecting ring.

[0012] As a preferred technical solution of the present application, the lead core is cast inside the branch pipe through a second connecting ring.

[0013] As a preferred technical solution of the present application, a protrusion is fixed on the outer wall of the end of the branch pipe, and grooves are distributed on the inner wall of the rubber protective sleeve, and the protrusion is clamped inside the groove.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] In the scheme of this application:

[0016] 1. By strengthening the setting of the rubber layer component, the lead core is cast in the cylinder hole formed by the first connecting ring and the second connecting ring, and the casting liquid will flow into the branch pipes on both sides through the second connecting ring to realize the casting of the lead core in the branch pipe, so that the lead core of the rubber bearing is in a branch tree shape, which greatly improves the overall strength of the rubber bearing. A steel wire mesh is woven on the outer wall between the branch pipes, and wave springs are fixed on the outer walls on both sides of the steel wire mesh to form a vibration isolation layer. The setting of the steel wire mesh makes the rubber bearing more evenly stressed, improves the adaptability of the rubber bearing to shear deformation and angular deformation, and the setting of the wave spring makes the rubber bearing have a high-efficiency vibration isolation effect;

[0017] 2. Through the setting of the sacrificial anode buried protection component, the lead rubber bearing is fixed underground through the buried rod and the installation hole, and solar power generation is carried out through the flexible photovoltaic panel to charge the battery. During use, the battery forms a circuit with the first power line and the buried rod through the second power line and the bottom plate. Through the external DC power supply, the protected rubber bearing metal and another additional buried rod are used as the two poles of the electrolytic cell, and the protected rubber bearing metal structure becomes the cathode. The positive electrode of the battery is connected through the second power line, so that the electron migration caused by metal corrosion is suppressed, thereby avoiding or weakening the occurrence of metal corrosion of the rubber bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the entire three-dimensional cross-section structure of the high-efficiency vibration isolation lead rubber bearing provided in this application;

[0019] Figure 2 A schematic diagram of the three-dimensional decomposition structure of the reinforced rubber layer component in the high-efficiency vibration isolation lead core rubber bearing provided in this application;

[0020] Figure 3 An enlarged structural diagram of area A in the high-efficiency vibration isolation lead rubber bearing provided in this application;

[0021] Figure 4 An enlarged structural diagram of area B in the high-efficiency vibration isolation lead rubber bearing provided in this application;

[0022] Figure 5 An enlarged structural diagram of the C area in the high-efficiency vibration isolation lead rubber bearing provided in this application;

[0023] Figure 6 A schematic diagram of the three-dimensional structure of the rubber protective sleeve in the high-efficiency vibration isolation lead core rubber bearing provided in this application.

[0024] Indicated in the figure:

[0025] 1. Rubber bearing body; 2. Lead core; 3. Upper sealing plate; 4. Laminated rubber assembly; 5. Lower sealing plate; 6. Lower bottom plate; 7. Upper bottom plate; 8. Rubber protective sleeve; 9. Mounting hole; 10. Sacrificial anode buried protection assembly; 11. Groove; 12. Bump;

[0026] 401, inner rubber layer; 402, vibration isolation braided layer; 403, first connecting ring; 404, second connecting ring; 405, plug rod; 406, plug hole; 407, branch pipe; 408, steel wire braided mesh; 409, wave spring;

[0027] 101. buried pole; 102. electric control box; 103. battery; 104. power supply controller; 105. first power line; 106. second power line; 107. flexible photovoltaic panel. DETAILED DESCRIPTION

[0028] To make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments.

[0029] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the present invention to be protected, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present utility model, it should be noted that the terms "upper", "lower", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0033] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 The present embodiment proposes a high-efficiency vibration isolation lead core rubber bearing, including a rubber bearing body 1, the interior of the rubber bearing body 1 is filled with a lead core 2, a laminated rubber assembly 4 is mounted on the outer wall of the lead core 2, an upper sealing plate 3 is fixed to the top of the laminated rubber assembly 4, a lower sealing plate 5 is fixed to the bottom end of the laminated rubber assembly 4, the rubber bearing body 1 is located on the outer walls on both sides of the sealing plate, a lower base plate 6 and an upper base plate 7 are connected, a rubber protective sleeve 8 is mounted on the outside of the laminated rubber assembly 4, mounting holes 9 are opened through the outer walls of the four corners of the lower base plate 6 and the upper base plate 7, and a sacrificial anode buried protection component 10 is arranged on the top outer wall of the lower base plate 6.

[0034] As a preferred embodiment, on the basis of the above-mentioned method, further, the laminated rubber assembly 4 includes an inner rubber layer 401 and a vibration isolation braided layer 402 that are alternately extended and stacked, the inner part of the inner rubber layer 401 is inlaid with a first connecting ring 403 and fixed, the inner part of the vibration isolation braided layer 402 is inlaid with a second connecting ring 404 and fixed, the top outer walls of the first connecting ring 403 and the second connecting ring 404 are distributed and fixed with plug rods 405, the bottom outer walls of the first connecting ring 403 and the second connecting ring 404 are distributed and opened with plug holes 406, the inner wall of the second connecting ring 404 is distributed and connected with branch pipes 407, the outer walls between the branch pipes 407 are woven with steel wire braided nets 408, and wave springs 409 are fixed to the outer walls on both sides of the steel wire braided nets 408. When the laminated rubber structure inside the lead core rubber bearing is assembled, the inner rubber layer 401 and the vibration isolation braided layer 402 structure are driven as needed to drive the first connecting ring 401 inside the inner rubber layer 401 The plug rod 405 on the upper surface of the vibration isolation braided layer 402 is aligned and inserted into the plug hole 406 at the bottom of the second connecting ring 404, so as to realize the extended stacking of the inner rubber layer 401 and the vibration isolation braided layer 402, and the stacking forms a laminated rubber assembly 4, and then the lead core 2 is cast in the cylindrical hole formed by the first connecting ring 403 and the second connecting ring 404, and the casting liquid flows into the branch pipes 407 on both sides through the second connecting ring 404, so as to realize the casting of the lead core 2 in the branch pipes 407, so that the rubber The lead core 2 of the rubber bearing is in a branch tree shape, which greatly improves the overall strength of the rubber bearing. A steel wire mesh 408 is woven on the outer wall between the branch pipes 407, and wave springs 409 are fixed on the outer walls on both sides of the steel wire mesh 408 to form a vibration isolation woven layer 402. The setting of the steel wire mesh 408 makes the rubber bearing more evenly stressed and improves the adaptability of the rubber bearing to shear deformation and angular deformation. The setting of the wave spring 409 makes the rubber bearing have a high-efficiency vibration isolation effect.

[0035] As a preferred embodiment, on the basis of the above-mentioned method, further, the sacrificial anode buried protection component 10 includes a buried rod 101 inserted into the mounting hole 9, and the buried rod 101 is a sacrificial anode material, an electric control box 102 is fixed on the top outer wall of the lower base plate 6, a battery 103 is fixed on the bottom inner wall of the electric control box 102, a power supply controller 104 is installed on the bottom inner wall of the electric control box 102, and the power supply controller 104 and the battery 103 are electrically connected, the positive end of the battery 103 is connected to a first power line 105, and one end of the first power line 105 is connected to the top of the buried rod 101, the negative end of the battery 103 is connected to a second power line 106, and one end of the second power line 106 is connected to the outer wall of the lower base plate 6 and the upper base plate 7, and a flexible photovoltaic panel 107 is bonded to the outer wall of the rubber protective cover 8, and the electrical The output end is connected to the electrical input end of the battery 103. During the installation and fixing process of the lead rubber bearing, the lead rubber bearing is buried and fixed by cooperating with the installation hole 9 through the buried rod 101. During the installation and use of the lead rubber bearing, solar power generation is performed through the flexible photovoltaic panel 107 and the battery 103 is charged. During use, the battery 103 forms a circuit with the first power line 105 and the buried rod 101 through the second power line 106 and the bottom plate. Through an external DC power supply, the protected rubber bearing metal and another additional buried rod 101 are used as the two poles of the electrolytic cell, so that the protected rubber bearing metal structure becomes the cathode, and is connected to the positive electrode of the battery 103 through the second power line 106, thereby applying an external current to the surface of the corroded metal structure, so that the electron migration caused by metal corrosion is suppressed, and the occurrence of metal corrosion of the rubber bearing is avoided or weakened.

[0036] As a preferred embodiment, on the basis of the above method, further, the first connecting ring 403 and the second connecting ring 404 are alternately stacked by docking with the insertion rod 405 and the insertion hole 406, and the lead core 2 is cast inside the first connecting ring 403 and the second connecting ring 404. The cylindrical structure formed by the first connecting ring 403 and the second connecting ring 404 plays a role in casting positioning and reinforcement of the lead core 2.

[0037] As a preferred embodiment, on the basis of the above method, further, the lead core 2 is cast inside the branch tube 407 through the second connecting ring 404, so that the lead core 2 of the rubber bearing is in a branch tree shape, which greatly improves the overall strength of the rubber bearing.

[0038] As a preferred embodiment, on the basis of the above-mentioned method, further, a protrusion 12 is fixed on the outer wall of the end of the branch pipe 407, and grooves 11 are distributed on the inner wall of the rubber protective sleeve 8, and the protrusion 12 is clamped in the inside of the groove 11, and the rubber protective sleeve 8 is sleeved on the outside of the lead rubber laminated rubber. During the sleeve fixing process, the groove 11 in the rubber protective sleeve 8 is clamped in the protrusion 12 at the end of the branch pipe 407, so as to realize the sleeve fixation of the rubber protective sleeve 8 outside the lead rubber support.

[0039] Specifically, when the high-efficiency vibration isolation lead rubber bearing is working / in use: when the internal laminated rubber structure of the lead rubber bearing is assembled, the inner rubber layer 401 and the vibration isolation braided layer 402 structure are driven as needed, and the insertion rod 405 on the first connecting ring 403 in the inner rubber layer 401 is aligned and inserted into the insertion hole 406 at the bottom of the second connecting ring 404 in the vibration isolation braided layer 402, so as to realize the extended stacking of the inner rubber layer 401 and the vibration isolation braided layer 402 structure, and the stacking forms the laminated rubber assembly 4, and then The lead core 2 is cast in the cylinder hole formed by the first connecting ring 403 and the second connecting ring 404, and the casting liquid will flow into the branch pipes 407 on both sides through the second connecting ring 404, so as to realize the casting of the lead core 2 in the branch pipes 407, so that the lead core 2 of the rubber bearing is in a branch tree shape, which greatly improves the overall strength of the rubber bearing. A steel wire mesh 408 is woven on the outer wall between the branch pipes 407, and wave springs 409 are fixed on the outer walls on both sides of the steel wire mesh 408 to form a vibration isolation layer 402. The arrangement of the net 408 makes the rubber bearing more evenly stressed, and improves the adaptability of the rubber bearing to shear deformation and angular deformation. The arrangement of the wave spring 409 makes the rubber bearing have a high-efficiency vibration isolation effect. During the installation and fixing process of the lead rubber bearing, the lead rubber bearing is fixed underground by means of the buried rod 101 in cooperation with the installation hole 9. During the installation and use of the lead rubber bearing, solar power generation is performed through the flexible photovoltaic panel 107 and the battery 103 is charged. During use, the battery 103 forms a circuit with the first power line 105 and the buried rod 101 through the second power line 106 and the bottom plate. Through an external DC power supply, the protected rubber bearing metal and another additional buried rod 101 are used as the two poles of the electrolytic cell, so that the protected rubber bearing metal structure becomes the cathode, and is connected to the positive electrode of the battery 103 through the second power line 106, thereby applying an external current to the surface of the corroded metal structure, so that the electron migration caused by metal corrosion is suppressed, and the occurrence of metal corrosion of the rubber bearing is avoided or weakened.

[0040] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention are included in the scope of the claims of the present invention.

Claims

1. A high-efficiency vibration isolation lead rubber bearing, characterized in that: The invention comprises a rubber bearing body (1), wherein a lead core (2) is filled inside the rubber bearing body (1), a laminated rubber assembly (4) is sleeved on the outer wall of the lead core (2), an upper sealing plate (3) is fixed to the top of the laminated rubber assembly (4), and a lower sealing plate (5) is fixed to the bottom of the laminated rubber assembly (4), a lower bottom plate (6) and an upper bottom plate (7) are connected to the outer walls of the rubber bearing body (1) on both sides of the sealing plate, a rubber protective sleeve (8) is sleeved on the outside of the laminated rubber assembly (4), mounting holes (9) are formed through the outer walls of the four corners of the lower bottom plate (6) and the upper bottom plate (7), and a sacrificial anode buried protection component (10) is arranged on the top outer wall of the lower bottom plate (6).

2. The high-efficiency vibration isolation lead rubber bearing according to claim 1 is characterized in that: The laminated rubber assembly (4) comprises an inner rubber layer (401) and a vibration isolation braided layer (402) which are alternately extended and stacked, a first connecting ring (403) is embedded and fixed inside the inner rubber layer (401), a second connecting ring (404) is embedded and fixed inside the vibration isolation braided layer (402), plug rods (405) are distributed and fixed on the top outer walls of the first connecting ring (403) and the second connecting ring (404), plug holes (406) are distributed and opened on the bottom outer walls of the first connecting ring (403) and the second connecting ring (404), a branch pipe (407) is distributed and connected on the inner wall of the second connecting ring (404), a steel wire braided net (408) is woven on the outer wall between the branch pipes (407), and wave springs (409) are fixed and fitted on the outer walls on both sides of the steel wire braided net (408).

3. The high-efficiency vibration isolation lead rubber bearing according to claim 1 is characterized in that: The sacrificial anode buried protection assembly (10) comprises a buried rod (101) inserted into the mounting hole (9), and the buried rod (101) is made of sacrificial anode material; an electric control box (102) is fixed on the top outer wall of the lower base plate (6); a storage battery (103) is fixed on the bottom inner wall of the electric control box (102); a power supply controller (104) is installed on the bottom inner wall of the electric control box (102), and the power supply controller (104) and the storage battery (103) are electrically connected; the storage battery (103) is connected to the electric control box (102); The positive terminal of the battery (103) is connected to a first power line (105), and one end of the first power line (105) is connected to the top of the buried pole (101); the negative terminal of the battery (103) is connected to a second power line (106), and one end of the second power line (106) is connected to the outer wall of the lower base plate (6) and the upper base plate (7); a flexible photovoltaic panel (107) is attached to the outer wall of the rubber protective sleeve (8), and the electrical output end of the flexible photovoltaic panel (107) is connected to the electrical input end of the battery (103).

4. The high-efficiency vibration isolation lead rubber bearing according to claim 2 is characterized in that: The first connecting ring (403) and the second connecting ring (404) are alternately stacked by butting against each other via the insertion rod (405) and the insertion hole (406), and the lead core (2) is cast inside the first connecting ring (403) and the second connecting ring (404).

5. The high-efficiency vibration isolation lead rubber bearing according to claim 4 is characterized in that: The lead core (2) is cast inside the branch tube (407) via a second connecting ring (404).

6. The high-efficiency vibration isolation lead rubber bearing according to claim 2 is characterized in that: A protrusion (12) is fixed on the outer wall of the end of the branch pipe (407), and grooves (11) are distributed on the inner wall of the rubber protective sleeve (8), and the protrusion (12) is clamped inside the groove (11).

Citation Information

Patent Citations

  • Lead rubber support

    CN204039906U