Rubber joint free of extrusion and tightening

Abstract

The utility model discloses a rubber joint free of extrusion and tightening, which comprises a shaft core and a rubber layer, the rubber layer is wrapped outside the shaft core, an extrusion sleeve is wrapped outside the rubber layer, an outer sleeve is wrapped outside the extrusion sleeve, a casing pipe is wrapped outside the outer sleeve, an extrusion block is fixedly arranged in the casing pipe in a penetrating way, and the extrusion block is fixedly arranged in the casing pipe in a penetrating way. The outer portion of the sleeve is wrapped with an upper pressing cover, the outer portion of the sleeve is sleeved with a lower pressing cover located below the upper pressing cover, the bottom of the peripheral face of the upper pressing cover is integrally connected with an upper connecting ring, the top of the peripheral face of the lower pressing cover is integrally connected with a lower connecting ring, and the middle of the upper connecting ring is rotationally connected with a connecting bolt in a penetrating mode. The bottom of the connecting bolt is in threaded connection with the middle of the lower connecting ring in a penetrating mode. After the upper gland and the lower gland are clamped and fixed through the connecting bolt, the extrusion sleeve and the outer sleeve are pressed and fixed through the pressing convex ring, and the stability of the combined extrusion structure is further ensured.

Description

Technical Field

[0001] This utility model relates to the field of rubber joint technology, specifically a rubber joint that does not require squeezing or compression. Background Technology

[0002] Rubber joints are key components of hydraulic vibration dampers, used in various vibration reduction parts of rail transit systems. Their main structure consists of a metal mandrel and an outer sleeve, with a rubber layer extruded between them. Rubber joints are primarily installed in areas of high vibration, used for connection in vibration-damping components. The manufacturing process involves: machining the mandrel and outer sleeve to size; fitting them together in a vulcanization mold; and extruding and vulcanizing the rubber layer within the space; then, using extrusion fixtures, radially tightening the outer sleeve to compress the rubber layer, ensuring its elasticity. However, in this manufacturing process, the shrinkage of the metal outer sleeve under external force is limited. For rubber joint structures with a thicker rubber layer, the compactness of the extruded rubber layer may still be insufficient, thus affecting the performance of the rubber joint.

[0003] Therefore, we propose a rubber joint that does not require compression. Utility Model Content

[0004] The purpose of this invention is to provide a rubber joint that does not require compression or tightening, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a compression-free rubber joint, comprising a shaft core and a rubber layer, wherein the rubber layer is wrapped around the outside of the shaft core, the outside of the rubber layer is wrapped with a compression sleeve, the outside of the compression sleeve is wrapped with an outer sleeve, the outside of the outer sleeve is wrapped with a sleeve tube, a compression block is fixedly installed through the inside of the sleeve tube, an upper pressure cap is wrapped around the outside of the sleeve tube, and a lower pressure cap located below the upper pressure cap is fitted around the outside of the sleeve tube, an upper connecting ring is integrally connected to the bottom of the outer circumference of the upper pressure cap, a lower connecting ring is integrally connected to the top of the outer circumference of the lower pressure cap, a connecting bolt is rotatably connected through the middle of the upper connecting ring, and the bottom of the connecting bolt is threadedly connected to the middle of the lower connecting ring.

[0006] Optionally, the top of the upper pressure cap is integrally connected with a clamping protrusion located above the extrusion sleeve, and the bottom of the lower pressure cap is integrally connected with another clamping protrusion located below the extrusion sleeve. The two clamping protrusions are symmetrically arranged at the upper and lower ends of the extrusion sleeve, the outer sleeve, and the tube.

[0007] Optionally, the top and bottom of the compression sleeve are provided with auxiliary pressure rings, and the two auxiliary pressure rings are respectively abutted against the two pressing protrusions.

[0008] Optionally, the sleeve has several evenly distributed through slots in its middle section. The through slots penetrate the inner and outer walls of the sleeve, and the extrusion block is fixedly installed inside the through slots of the sleeve.

[0009] Optionally, the length of the connecting bolt is half the height of the upper cover, and the lower connecting ring has threaded holes that correspond one-to-one with the connecting bolts.

[0010] Optionally, the diameter and thickness of the upper connecting ring are the same as those of the lower connecting ring.

[0011] Optionally, the sleeve is made of the same material as the outer sleeve, and the extrusion block is made of stainless steel.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This compression-free rubber joint uses an upper and lower pressure cap to pre-wrap the rubber layer around the mandrel, which is then fitted together with the outer sleeve. A compression sleeve is placed between the rubber layer and the outer sleeve, and the compression protrusions of the upper and lower pressure caps simultaneously compress the upper and lower sides of the compression sleeve, causing the middle of the compression sleeve box to come together to compress the rubber layer. This replaces the method of applying large extrusion pressure radially to compress the outer sleeve from the outer circumference to compress the rubber layer, reducing the manufacturing difficulty of the rubber joint. The process is time-saving and labor-saving. After the connecting bolts secure the upper and lower pressure caps with the upper and lower connecting rings, the compression sleeve and the outer sleeve are further compressed by the compression protrusions, further ensuring the stability of the combined extrusion structure. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a rubber joint that does not require compression and tightening according to this utility model;

[0015] Figure 2 This is a schematic diagram of the extrusion sleeve of a rubber joint that requires no extrusion and is compressed according to this utility model.

[0016] Figure 3 This is a schematic diagram of the upper and lower pressure caps of a rubber joint that can be compressed without squeezing, according to this utility model.

[0017] In the diagram: 1. Shaft core; 2. Rubber layer; 3. Extrusion sleeve; 4. Outer sleeve; 5. Sleeve; 6. Extrusion block; 7. Upper pressure cap; 8. Lower pressure cap; 9. Upper connecting ring; 10. Connecting bolt; 11. Lower connecting ring; 12. Auxiliary pressure ring; 13. Pressing protrusion ring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1 to 3 This utility model provides a compression-free rubber joint, including a shaft core 1 and a rubber layer 2. The rubber layer 2 wraps around the shaft core 1, and a compression sleeve 3 wraps around the rubber layer 2. An outer sleeve 4 wraps around the compression sleeve 3, and a sleeve 5 wraps around the outer sleeve 4. A compression block 6 is fixedly installed inside the sleeve 5. An upper pressure cover 7 wraps around the sleeve 5, and a lower pressure cover 8 is fitted around the sleeve 5 below the upper pressure cover 7. An upper connecting ring 9 is integrally connected to the bottom of the outer circumference of the upper pressure cover 7, and a lower connecting ring 11 is integrally connected to the top of the outer circumference of the lower pressure cover 8. A connecting bolt 10 is rotatably connected through the middle of the upper connecting ring 9, and the bottom of the connecting bolt 10 is threaded through the middle of the lower connecting ring 11. By setting the upper pressure cover 7, a compression block 6 is fixedly installed inside the sleeve 5. The rubber layer 2 is pre-wrapped around the outer periphery of the mandrel by the upper pressure cover 7 and the lower pressure cover 8, and then fitted together with the outer sleeve 4. By setting the extrusion sleeve 3 between the rubber layer 2 and the outer sleeve 4, the upper and lower sides of the extrusion sleeve 3 are simultaneously extruded by the pressing protrusion ring 13 of the upper pressure cover 7 and the lower pressure cover 8, so that the middle of the extrusion sleeve 3 box is brought together to squeeze the rubber layer 2. This replaces the method of applying a large extrusion force to the outer sleeve 4 radially to squeeze the rubber layer 2 from the outer periphery of the outer sleeve 4, thereby reducing the difficulty of the rubber joint production process and saving time and effort. After the connecting bolt 10 secures the upper pressure cover 7 and the lower pressure cover 8 through the upper connecting ring 9 and the lower connecting ring 11, the extrusion sleeve 3 and the outer sleeve 4 are further secured by the pressing protrusion ring 13 to further ensure the stability of the combined extrusion structure.

[0020] The top of the upper pressure cap 7 is integrally connected to a pressing protrusion 13 located above the extrusion sleeve 3, and the bottom of the lower pressure cap 8 is integrally connected to another pressing protrusion 13 located below the extrusion sleeve 3. The two pressing protrusions 13 are symmetrically arranged at the upper and lower ends of the extrusion sleeve 3, the outer sleeve 4, and the sleeve 5.

[0021] The top and bottom of the compression sleeve 3 are provided with auxiliary pressure rings 12, and the two auxiliary pressure rings 12 are respectively abutted against the two pressing protrusions 13.

[0022] The sleeve 5 has several evenly distributed through slots in the middle. The through slots in the sleeve 5 penetrate the inner wall and outer wall of the sleeve 5. The extrusion block 6 is fixedly installed inside the through slots in the sleeve 5.

[0023] The length of the connecting bolt 10 is half the height of the upper pressure cover 7, and the lower connecting ring 11 has threaded holes that correspond one-to-one with the connecting bolt 10.

[0024] The diameter and thickness of the upper connecting ring 9 are the same as those of the lower connecting ring 11.

[0025] The sleeve 5 is made of the same material as the outer sleeve 4, and the extrusion block 6 is made of stainless steel.

[0026] Working principle:

[0027] The rubber layer 2 is pre-wrapped around the outer periphery of the mandrel and then fitted together with the outer sleeve 4. An extrusion sleeve 3 is set between the rubber layer 2 and the outer sleeve 4. The upper and lower sides of the extrusion sleeve 3 are simultaneously extruded by the pressing protrusion rings 13 of the upper pressure cover 7 and the lower pressure cover 8, so that the middle of the extrusion sleeve 3 box is brought together to compress the rubber layer 2. This replaces the method of applying a large extrusion force to the outer sleeve 4 radially to compress the rubber layer 2 from the outer periphery of the outer sleeve 4 through the extrusion tool. This reduces the difficulty of the rubber joint production process and saves time and effort. After the connecting bolts 10 secure the upper pressure cover 7 and the lower pressure cover 8 through the upper connecting ring 9 and the lower connecting ring 11, the extrusion sleeve 3 and the outer sleeve 4 are further secured by the pressing protrusion rings 13 to further ensure the stability of the combined extrusion structure.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A compression-free rubber joint, comprising a core (1) and a rubber layer (2), characterized in that, The rubber layer (2) is wrapped around the outside of the shaft core (1). The rubber layer (2) is wrapped with a compression sleeve (3). The compression sleeve (3) is wrapped with an outer sleeve (4). The outer sleeve (4) is wrapped with a sleeve (5). A compression block (6) is fixedly installed inside the sleeve (5). The sleeve (5) is wrapped with an upper pressure cover (7). The sleeve (5) is fitted with a lower pressure cover (8) located below the upper pressure cover (7). The bottom of the outer circumference of the upper pressure cover (7) is integrally connected with an upper connecting ring (9). The top of the outer circumference of the lower pressure cover (8) is integrally connected with a lower connecting ring (11). A connecting bolt (10) is rotatably connected through the middle of the upper connecting ring (9). The bottom of the connecting bolt (10) is threadedly connected to the middle of the lower connecting ring (11).

2. The compression-free rubber joint according to claim 1, characterized in that, The top of the upper pressure cap (7) is integrally connected to a pressing protrusion (13) located above the extrusion sleeve (3), and the bottom of the lower pressure cap (8) is integrally connected to another pressing protrusion (13) located below the extrusion sleeve (3). The two pressing protrusions (13) are symmetrically arranged at the upper and lower ends of the extrusion sleeve (3), the outer sleeve (4), and the sleeve (5).

3. A compression-free rubber joint according to claim 2, characterized in that, The top and bottom of the compression sleeve (3) are provided with auxiliary pressure rings (12), and the two auxiliary pressure rings (12) are respectively abutted against the two pressing protrusions (13).

4. The compression-free rubber joint according to claim 1, characterized in that, The sleeve (5) has several evenly distributed through slots in the middle. The through slots of the sleeve (5) penetrate the inner wall and outer wall of the sleeve (5). The extrusion block (6) is fixedly installed inside the through slots of the sleeve (5).

5. A compression-free rubber joint according to claim 1, characterized in that, The length of the connecting bolt (10) is half the height of the upper pressure cover (7), and the lower connecting ring (11) has threaded holes that correspond one-to-one with the connecting bolt (10).

6. A compression-free rubber joint according to claim 1, characterized in that, The diameter and thickness of the upper connecting ring (9) are the same as those of the lower connecting ring (11).

7. A compression-free rubber joint according to claim 4, characterized in that, The sleeve (5) is made of the same material as the outer sleeve (4), and the extrusion block (6) is made of stainless steel.

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