A structure for fitting natural rubber to a steel pipe

Abstract

This application discloses a mating structure of natural rubber and steel pipe, belonging to the field of vibration damping structure technology. It provides a mating structure of natural rubber and steel pipe that is less prone to component misalignment and separation. The structure includes an inner steel cylinder and an outer steel sleeve. The inner steel cylinder is located inside the outer steel sleeve. A rubber partition is provided between the outer surface of the inner steel cylinder and the inner wall of the outer steel sleeve. Both ends of the outer steel sleeve have shrinkage flanges with smaller diameters. The rubber partition is located between the two shrinkage flanges and is simultaneously blocked by both shrinkage flanges. The inner steel cylinder is bonded and fixed to the rubber partition with adhesive. Both ends of the rubber partition have constricting flanges, which are located within the shrinkage flanges. This application designs the outer steel sleeve as a wrapping structure to constrain the expansion range of the rubber partition, making the fit between the rubber partition and the inner steel cylinder tighter. Even if the inner steel cylinder expands or contracts, the tightness of the fit is maintained, thus preventing the adhesive layer from detaching and improving the product's yield rate.

Description

Technical Field

[0001] This application relates to the field of vibration damping structure technology, and in particular to a combination structure of natural rubber and steel pipe. Background Technology

[0002] To improve the seismic resistance of steel pipes, natural rubber is usually used as a shock-absorbing material. To ensure that the natural rubber provides stable shock absorption for the steel pipe, glue is usually applied between the rubber and the steel pipe to form an adhesive layer to reduce relative movement. However, the steel pipe has a significant thermal expansion and contraction effect, and the rubber material is prone to delamination, with a delamination rate of up to 40%. Utility Model Content

[0003] The purpose of this application is to provide a mating structure between natural rubber and steel pipe that is less prone to component misalignment and separation.

[0004] To achieve the above objectives, this application provides a mating structure of natural rubber and steel pipe: including an inner steel cylinder and an outer steel sleeve, wherein the inner steel cylinder is located inside the outer steel sleeve, a rubber partition is provided between the outer side of the inner steel cylinder and the inner wall of the outer steel sleeve, both ends of the outer steel sleeve have shrink flanges with smaller diameters, the rubber partition is located between the two shrink flanges and is simultaneously blocked by the two shrink flanges, and the inner steel cylinder is bonded and fixed to the rubber partition with adhesive to form a tight adhesive layer.

[0005] As a preferred embodiment, both ends of the rubber separator have converging flanges, which are located within the shrinkage flanges, thereby preventing the rubber separator from shifting within the outer steel sleeve.

[0006] As a preferred embodiment, the outer radial direction of the constriction flange gradually decreases away from the rubber diaphragm, allowing more inner space for the constriction flange.

[0007] As a preferred embodiment, the maximum outer diameter of the gathering flange is smaller than the minimum inner diameter of the contraction flange, and there is a certain gap between the outer surface of the gathering flange and the inner wall of the contraction flange to facilitate tool insertion.

[0008] As a preferred embodiment, the inner diameter of the converging flange is larger than the inner diameter of the rubber separator body, providing more space for the converging flange to deform inward.

[0009] As a preferred embodiment, the two converging flanges are rotating bodies, coaxial with the main body of the rubber separator, which will result in more uniform axial force.

[0010] As a preferred embodiment, both the inner steel cylinder and the outer steel sleeve are rotating bodies, with the inner steel cylinder and the outer steel sleeve being coaxial and adapted to a rubber partition with uniform wall thickness.

[0011] As a preferred embodiment, the outer diameter of the rubber separator in the non-stressed state is smaller than the inner diameter of the outer steel sleeve body, and the inner diameter of the rubber separator in the non-stressed state is smaller than the outer diameter of the inner steel cylinder. In this way, after the inner cylinder is inserted with the rubber separator, the rubber separator can tightly wrap around the outer side of the inner steel cylinder, which can effectively improve the strength of the bonding surface.

[0012] Compared with the prior art, the beneficial effects of this application are as follows: (1) By designing an outer steel sleeve as a wrapping structure, the expansion range of the rubber separator is constrained, so that the rubber separator and the inner steel cylinder fit more tightly. Even if the inner steel cylinder expands or contracts, the tightness of the fit can be maintained, so that the adhesive layer formed by the glue is not easy to delaminate, thereby improving the product qualification rate. (2) By designing shrink flange structures at both ends of the outer steel sleeve, the rubber partition can be effectively blocked. Even without glue, the rubber partition and the outer steel sleeve can maintain a stable fit and will not have misalignment or separation problems. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of the overall structure of the natural rubber and steel pipe combination.

[0014] Figure 2 This is a first three-dimensional sectional view of the overall structure of the natural rubber and steel pipe combination.

[0015] Figure 3 This is a second perspective sectional view of the overall structure of the natural rubber and steel pipe combination.

[0016] Figure 4 This is a planar sectional view of the rubber separator in the structure of the natural rubber and steel pipe.

[0017] Figure 5 This is a three-dimensional sectional view of the outer steel sleeve of the natural rubber and steel pipe mating structure.

[0018] In the diagram: 1. Inner steel cylinder; 2. Rubber partition; 201. Shrinking flange; 3. Outer steel sleeve; 301. Shrinking retaining flange. Detailed Implementation

[0019] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0020] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0021] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0022] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0023] like Figure 1-5 The natural rubber and steel pipe mating structure shown includes an inner steel cylinder 1 and an outer steel sleeve 3. The inner steel cylinder 1 is usually made of carbon structural steel, and the outer steel sleeve 3 is usually made of stainless steel. The inner steel cylinder 1 is located inside the outer steel sleeve 3, and a rubber partition 2 is provided between the outer side of the inner steel cylinder 1 and the inner wall of the outer steel sleeve 3 to provide a buffer for the inner steel cylinder 1 and the outer steel sleeve 3. Both ends of the outer steel sleeve 3 have shrink flanges 301 with smaller diameters. The rubber partition 2 is located between the two shrink flanges 301 and is blocked by the two shrink flanges 301 at the same time, so that the rubber partition 2 is not easy to come out of the outer steel sleeve 3.

[0024] Both ends of the rubber partition 2 have converging flanges 201, which protrude from the end face of the rubber partition 2. The two converging flanges 201 are rotating bodies and are coaxial with the main body of the rubber partition 2. The converging flanges 201 are both located inside the shrinkage flange 301. However, it should be noted that the outer radial direction of the converging flange 201 gradually decreases away from the rubber partition 2. The maximum outer diameter of the converging flange 201 is smaller than the minimum inner diameter of the shrinkage flange 301. That is to say, there is a gap between the outer surface of the converging flange 201 and the inner wall of the shrinkage flange 301. The inner diameter of the converging flange 201 is larger than the inner diameter of the main body of the rubber partition 2. In this way, the converging flange 201 is easier to shrink and deform inward.

[0025] Both the inner steel cylinder 1 and the outer steel sleeve 3 are rotating bodies. The inner steel cylinder 1 and the outer steel sleeve 3 are coaxial, so the axial thickness of the rubber partition 2, which is also a rotating body, is uniform. The outer diameter of the rubber partition 2 in the non-stressed state is smaller than the inner diameter of the outer steel sleeve 3, making it easier for the rubber partition 2 to slide into the outer steel sleeve 3. The inner diameter of the rubber partition 2 in the non-stressed state is smaller than the outer diameter of the inner steel cylinder 1, so the inner steel cylinder 1 can fit tightly with the rubber partition 2. The inner steel cylinder 1 is bonded and fixed to the rubber partition 2 with glue. Since the outer side of the inner steel cylinder 1 is in close contact with the inner wall of the rubber partition 2, the probability of delamination is effectively reduced. At the same time, during the process of embedding the rubber partition 2, the inner and outer diameters of the rubber partition 2 will be expanded simultaneously, so that the outer side of the rubber partition 2 is in close contact with the inner wall of the outer steel sleeve 3, further increasing the fit between the rubber partition 2 and the outer steel sleeve 3.

[0026] Working principle: During assembly, first apply a small amount of lubricating oil to the outer surface of the rubber partition 2. Then, compress one end of the rubber partition 2 into one shrinkage flange 301 of the outer steel sleeve 3, pressing the rubber partition 2 into the outer steel sleeve 3 until it reaches another shrinkage flange 301. At this point, the constraint of the first shrinkage flange 301 on the rubber partition 2 is released, and the rubber partition 2 naturally expands, roughly coaxial with the outer steel sleeve 3. Then, apply a fluid adhesive to the inner wall of the rubber partition 2. The uncured adhesive has a certain degree of lubricity. Before the adhesive cures, press the inner steel cylinder 1 into the rubber partition 2 from one end until the set mating depth is reached. During the process of pressing the inner steel cylinder 1 into the rubber partition 2, the outer diameter of the rubber partition 2 will gradually increase and will fit tightly against the inner wall of the outer steel sleeve 3. In addition, the shrinkage flange 301 at the end of the outer steel sleeve 3 will prevent the rubber partition 2 from coming off the outer steel sleeve 3. After the glue cures, a thin adhesive layer is formed between the outer side of the inner steel cylinder 1 and the inner wall of the rubber partition 2. The tight fit between the rubber partition 2 and the inner steel cylinder 1 makes the adhesion stronger and less likely to cause delamination due to the shrinkage or expansion of the inner steel cylinder 1. At the same time, due to the restraining effect of the shrinkage flange 301 at both ends of the outer steel sleeve 3 on the rubber partition 2, the rubber partition 2 will not detach from the outer steel sleeve 3.

[0027] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A composite structure of natural rubber and steel pipe, characterized in that: The device includes an inner steel cylinder (1) and an outer steel sleeve (3). The inner steel cylinder (1) is located inside the outer steel sleeve (3). A rubber partition (2) is provided between the outer side of the inner steel cylinder (1) and the inner wall of the outer steel sleeve (3). Both ends of the outer steel sleeve (3) have shrink flanges (301) with smaller diameters. The rubber partition (2) is located between the two shrink flanges (301) and is blocked by the two shrink flanges (301) at the same time. The inner steel cylinder (1) is bonded and fixed to the rubber partition (2) with glue.

2. The mating structure of natural rubber and steel pipe as described in claim 1, characterized in that: Both ends of the rubber separator (2) have a retractable flange (201), and the retractable flange (201) is located inside the shrinkage flange (301).

3. The mating structure of natural rubber and steel pipe as described in claim 2, characterized in that: The outer radial direction of the converging flange (201) gradually decreases away from the rubber diaphragm (2).

4. The mating structure of natural rubber and steel pipe as described in claim 3, characterized in that: The maximum outer diameter of the converging flange (201) is smaller than the minimum inner diameter of the contraction flange (301).

5. The mating structure of natural rubber and steel pipe as described in claim 4, characterized in that: The inner diameter of the converging flange (201) is larger than the inner diameter of the main body of the rubber diaphragm (2).

6. The mating structure of natural rubber and steel pipe as described in claim 5, characterized in that: The two said convergence flanges (201) are rotating bodies and are coaxial with the main body of the rubber diaphragm (2).

7. The mating structure of natural rubber and steel pipe as described in any one of claims 1 to 6, characterized in that: Both the inner steel cylinder (1) and the outer steel sleeve (3) are rotating bodies, and the inner steel cylinder (1) and the outer steel sleeve (3) are coaxial.

8. The mating structure of natural rubber and steel pipe as described in claim 7, characterized in that: The outer diameter of the rubber partition (2) under non-stressed conditions is smaller than the inner diameter of the outer steel sleeve (3) body, and the inner diameter of the rubber partition (2) under non-stressed conditions is smaller than the outer diameter of the inner steel cylinder (1).

Images