Tool and process for bonding spring and rubber mat

Abstract

The tool for bonding the spring and the rubber mat solves the problem that the bonding effect of the bottom end of the spring and the rubber mat is poor, the tool comprises a base and a compression assembly, a bottom groove is formed in the base and extends to the two ends of the base in a bent mode, the extension path of the bottom groove is kept consistent with the extension path of the rubber mat, and the compression assembly is arranged on the base. A rubber mat is arranged in the bottom groove; the bottom end of the spring is used for sticking the rubber mat; the compression assembly comprises a vertical rod and a pressing block, the bottom end of the spring and the spring groove are bonded through glue, the upper end of the spring is downwards compressed through the pressing block, the bottom end of the spring and the spring groove are fully bonded, the pressing block is downwards compressed by a set distance and then stops moving, the bottom end of the spring and the spring groove are kept in a compressed state, and the spring and the rubber mat are taken out when the set time is reached. A gap is not easy to form between the spring and the rubber mat, so that the problem that the bonding effect of the bottom end of the spring and the rubber mat is poor is solved.

Description

Technical Field

[0001] The present invention relates to the field of spring shock absorption, and particularly to a tooling and process for bonding a spring and a rubber pad. Background Art

[0002] In the current design of front and rear shock absorbers of automobiles, a rubber pad is commonly used to protect the connection position between the spring and the vehicle body. Since the parts are located in the vehicle chassis system, during use, sand, gravel, mud, etc. may enter between the spring and the rubber pad, resulting in mutual friction between the two, damaging the surface coating of the spring, and in severe cases, even damaging the rigid base material of the spring, causing corrosion at the contact position of the spring, ultimately leading to early fracture of the spring. Moreover, due to the entry of corresponding substances into the gap between the two, abnormal noises often occur during use.

[0003] Based on the corresponding requirements, in order to avoid the above problems, prevent relative movement between the spring and the rubber pad during use, protect the gap at the contact position, prevent sand, gravel, mud, etc. from entering, and ultimately improve the spring life and prevent abnormal noises caused by relative friction. Since the corresponding bonding form is simple and can be achieved at room temperature, this method has low cost and high efficiency, and is suitable for passenger car products with relatively low corresponding loads. Summary of the Invention

[0004] The purpose of the present invention is to provide a tooling for bonding a spring and a rubber pad, which solves the problem of poor bonding effect between the bottom end of the spring and the rubber pad.

[0005] To achieve the above object, the technical solution adopted by the present invention is: The present invention provides a tooling for bonding a spring and a rubber pad, including a base and a compression assembly. A bottom groove is provided on the base, and the bottom groove extends curvedly to both ends of the base. The extension path of the bottom groove is consistent with the extension path of the rubber pad. The bottom groove is used for installing the rubber pad, and the bottom end of the spring is used for pasting the rubber pad. The compression assembly includes a vertical rod and a pressing block. The vertical rod is provided on the base and is used for the spring to pass through. The pressing block is slidably arranged on the vertical rod and is used for pressing the upper end of the spring.

[0006] Optionally, an avoidance area is provided on the base, and the avoidance area is located between both ends of the bottom groove.

[0007] Optionally, a through hole is provided on the base, and the vertical rod is sleeved in the through hole.

[0008] Furthermore, a sunk platform is provided in the through hole, and the sunk platform is located at the bottom of the base. A bottom ring is provided at the bottom of the vertical rod, and the bottom ring is clamped on the sunk platform.

[0009] Optionally, the compression assembly further includes an inner ring, which is slidably arranged on the vertical rod. The inner ring is arranged at the bottom of the pressing block, and the outer diameter of the pressing block is larger than that of the inner ring.

[0010] Optionally, the compression assembly further includes a limiting rod. A plurality of height holes are arranged in the vertical direction of the vertical rod, and the limiting rod is used to pass through the height holes.

[0011] Another object of the present invention also provides a process for bonding a spring and a rubber pad, including: S1. Design a rubber pad according to the shape of the bottom end of the spring. There is a spring groove on the rubber pad. S2. Apply glue to the bottom end of the spring and inside the spring groove, and place the bottom end of the spring in the spring groove. S3. Compress the spring downward to bond the bottom end of the spring to the spring groove. S4. Keep the compressed state for 5 - 30 minutes. S5. Release the spring.

[0012] Optionally, in S2, an active agent is coated on the bottom end of the spring or inside the spring groove.

[0013] Optionally, in S2, polyurethane glue is used as the glue.

[0014] Optionally, in S3, the spring is compressed downward by 3 - 5%.

[0015] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: For the tooling and process for bonding a spring and a rubber pad of the present invention, since an active agent is coated on the bottom end of the spring and inside the spring groove, then the bottom end of the spring and the spring groove are bonded with glue, and then the upper end of the spring is compressed downward by a pressing block to fully bond the bottom end of the spring to the spring groove. After the pressing block compresses downward by a set distance and pauses to move, the bottom end of the spring and the spring groove are kept in a compressed state. When the set time is reached, the spring and the rubber pad are taken out, and there is not likely to be a gap between the spring and the rubber pad. Therefore, the problem of poor bonding effect between the bottom end of the spring and the rubber pad is solved. Description of the Drawings

[0016] Some specific embodiments of the present invention will be described in detail hereinafter with reference to the drawings in an exemplary but non - restrictive manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings: Figure 1 is a three - dimensional view of a tooling and process for bonding a spring and a rubber pad according to a preferred embodiment of the present invention; Figure 2 is an exploded view of the compression assembly and the base; Figure 3It is an exploded view of the rubber pad and the base; Figure 4 It is a three-dimensional view of the rubber pad; Figure 5 It is Figure 4 The three-dimensional view of another perspective shown.

[0017] Among them, the reference numerals are explained as follows: 1. Rubber pad; 2. Spring groove; 3. Convex point; 4. Positioning piece; 5. Counterbore; 6. Base; 7. Rotating groove; 8. Spring; 9. Compression assembly; 21. Outer wall; 22. Inner wall; 23. Bottom wall; 61. Bottom groove; 62. Through hole; 63. Limiting piece; 64. Avoidance area; 65. Counterbore; 91. Vertical rod; 92. Pressing block; 93. Bottom ring; 94. Inner ring; 95. Limiting rod; 96. Height hole; 97. Compression column; 98. Avoidance hole. Specific embodiments

[0018] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0019] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0020] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0021] As Figure 1 and Figure 2 and Figure 3 shown, a tooling for bonding a spring and a rubber pad includes a base 6 and a compression assembly 9. A bottom groove 61 is provided on the base 6. The bottom groove 61 extends in a curved manner on the base 6. The extension path of the bottom groove 61 is consistent with the extension path of the rubber pad 1. The bottom groove 61 is used to install the rubber pad 1, and the bottom ring of the spring 8 is used to paste the rubber pad 1.

[0022] The compression assembly 9 includes a vertical rod 91 and a pressing block 92. The vertical rod 91 is arranged on the base 6. The vertical rod 91 is used to pass through the center of the spring 8, and the vertical rod 91 is sleeved inside the spring 8. The pressing block 92 is slidably arranged on the vertical rod 91. The pressing block 92 is used to squeeze the upper end of the spring 8. The pressing block 91 compresses the spring 8 from top to bottom, and the vertical rod 91 has a guiding effect on the pressing block 91.

[0023] The bottom groove 61 is inclinedly arranged on the base 6. Both ends of the bottom groove 61 are low and the middle is high. In this way, the rubber pad 1 is also inclinedly placed in the bottom groove 61. The rubber pad 1 is arranged in an interference fit with the bottom groove 61, and the rubber pad 1 can also be separated from the bottom groove 61.

[0024] A through hole 62 is arranged on the base 6. The through hole 62 is located inside the extension path of the bottom groove 61, and the bottom groove 61 is arranged around the through hole 62.

[0025] A limiting piece 63 is arranged on the base 6. The limiting piece 63 is located at the end of the bottom groove 61. When the rubber pad 6 is placed in the bottom groove 62, the positioning piece 4 abuts against the limiting piece 63.

[0026] An avoidance area 64 is also arranged on the base 6. The avoidance area 64 is located between both ends of the bottom groove 61. The avoidance area 64 is used to avoid a part of the bottom structure of the spring 8.

[0027] A counterbore 65 is arranged inside the through hole 62. The counterbore 65 is located at the lower part of the base 6. Both the through hole 62 and the counterbore 65 are for conveniently fixing the base 6.

[0028] A bottom ring 93 is arranged at the bottom of the vertical rod 91. The bottom ring 93 is clamped inside the counterbore 65, and the vertical rod 91 passes upward through the through hole 62.

[0029] The compression assembly 9 further includes an inner ring 94. The inner ring 94 is slidably arranged on the vertical rod 91. The inner ring 94 is arranged at the bottom of the pressing block 92. The inner ring 94 is integrally formed with the pressing block 92. The outer diameter dimension of the pressing block 92 is larger than the outer diameter dimension of the inner ring 94. The outer diameter dimension of the pressing block 92 is also larger than or equal to the outer diameter dimension of the spring 8. In this way, the pressing block 92 can completely cover the spring 8. The inner ring 94 moves with the pressing block 92. When the pressing block 92 presses on the top of the spring 8, the outer diameter dimension of the inner ring 94 is smaller than the inner diameter dimension of the spring 8, and the inner ring 94 is located inside the spring 8. The inner ring 94 has a limiting effect. If the spring 8 deflects, then the inner ring 94 can block the deflection of the spring 8.

[0030] The compression assembly 9 further includes a limit rod 95. A plurality of height holes 96 are provided in the vertical rod 91 in the vertical direction. The limit rod 95 is used to pass through the height holes 96 to determine the downward compression distance according to the height of the spring 8, apply a force to the pressing block 92. When the spring 8 contracts, the pressing block 92 and the spring 8 move downward together. For the set downward movement distance, the limit rod 95 is passed through the height holes 96. The limit rod 95 is also used to press on the top end of the pressing block 92. By pressing the limit rod 95 on the top of the pressing block 92, the pressing block 92 and the spring 8 cannot reset, so that the pressing block 92 and the spring 8 remain in the compressed state unchanged.

[0031] The compression assembly 9 further includes a compression column 97. The compression column 97 is hollow. The bottom end of the compression column 97 presses on the top end of the pressing block 92. The compression column 97 cooperates with other devices to press down. An avoidance hole 98 is also provided on the compression column 97. The avoidance hole 98 is used to avoid the limit rod 95 to facilitate the penetration of the limit rod 95 into the height holes 96.

[0032] As Figure 4 and Figure 5 shown, the rubber pad 1 in this example adopts an elastic rubber strip. The rubber pad 1 is bent and extended. The rubber pad 1 is a ring with an opening. A spring groove 2 is provided on the rubber pad 1. The spring groove 2 extends to both ends of the rubber pad 1. The extension path of the spring groove 2 is the same as the extension path of the rubber pad 1. The spring groove 2 also has a curvature. A plurality of convex points 3 are provided on the rubber pad 1. The convex points 3 are distributed at intervals in the spring groove 2. The spring groove 2 is used to place the bottom end of the spring 8. The spring groove 2 matches the bottom end of the spring 8. Glue is pre-coated in the spring groove 2. The bottom end of the spring 8 abuts on the plurality of convex points 3, so that there is a gap between the bottom end of the spring 8 and the wall of the spring groove 2.

[0033] A positioning piece 4 is provided on the rubber pad 1. The positioning piece 4 is located at the end of the spring groove 2. Only one positioning piece 4 is provided and it is only provided at one end of the spring groove 2. The head of the bottom end of the spring 8 abuts on the positioning piece 4. In this way, when the spring 8 is compressed downward, the positioning piece 4 can block the movement of the spring 8.

[0034] A sink 5 is further provided at the bottom end of the spring groove 2. The sink 5 is located inside the positioning piece 4. The sink 5 is used to collect debris and dust. In addition, when the head of the bottom end of the spring 8 is too large, it can be clamped in the sink 5. The spring body of the spring 8 is placed in the spring groove 2.

[0035] A rotation groove 7 is provided inside the rubber pad 1 for positioning. A positioning area 10 is provided on the bottom groove 61. When the rubber pad 1 is placed in the bottom groove 61, the rotation groove 7 fits in the positioning area 10, and the rotation groove 7 assists in fixing the rubber pad 1.

[0036] The spring groove 2 has an outer wall 21, an inner wall 22 and a bottom wall 23. The bottom wall 23 is arranged between the outer wall 26 and the inner wall 22. The inner wall 22 extends upward in a curved manner. The inner wall 22 has a curved surface. When the inner wall 22 extends upward, it moves away from the outer wall 21. In this way, the upper opening of the spring groove 2 is larger than the bottom, and the inner wall 22 can more easily fit the base 6, and the contact area between the inner wall 22 and the base 6 is increased.

[0037] The size of the upper opening of the spring groove 2 is larger than that of the bottom, which facilitates putting the spring 8 into the spring groove 2.

[0038] The bump 3 is in a hemispherical shape. A plurality of bumps 3 are evenly distributed in the spring groove 2. In this way, the glue can be evenly distributed between adjacent bumps 3, and the rubber pad 1 is evenly bonded in the spring groove 2. The bump 3 annularly surrounds the bottom ring of the spring 8.

[0039] A process for bonding a spring and a rubber pad is also provided, including: S1. Design a rubber pad according to the shape of the bottom end of the spring. There is a spring groove on the rubber pad; S2. Apply glue to the bottom end of the spring and in the spring groove. The bottom end of the spring is arranged in the spring groove, so that the bottom end of the spring is bonded in the spring groove; S3. Compress the spring downward so that the bottom end of the spring is bonded to the spring groove, and promote the full bonding of the bottom end of the spring and the spring groove; S4. Keep the compressed state for 5 - 30 minutes, and determine the compression time according to the spring specifications; S5. Release the spring.

[0040] In S2, an active agent is pre-coated on the bottom end of the spring or in the spring groove. The active agent increases the viscosity of the glue. The components in the active agent are calculated by weight percentage as follows: xylene ≤ 60.0%, ethylbenzene ≤ 15.0%, nitrogen-substituted aromatic compounds ≤ 10.0%, zinc compounds ≤ 5.0%, imides ≤ 5.0%, carbon black ≤ 5.0% and toluene ≤ 0.9%. Among them, the nitrogen-substituted aromatic compounds include indole, pyrrole, pyridine, quinoline and carbazole, the zinc compounds include zinc oxide, zinc hydroxide, zinc sulfate, zinc chloride and zinc sulfide, and the imides include phthalimide, succinimide, N-bromosuccinimide, glutarimide, maleimide, 3,4,9,10-perylenetetracarboxylic diimide, 1,8-naphthalenedicarboximide and imide fungicides.

[0041] In the present invention, the listed nitrogen-substituted aromatic compounds, zinc compounds and imides are only examples, and other nitrogen-substituted aromatic compounds, zinc compounds and imides that can enhance the viscosity of polyurethane glue should be covered within the protection scope of the present invention.

[0042] In S2, the glue used is polyurethane glue, which includes urethane-based glue and isocyanate-based glue. After adding an activator to the polyurethane glue, the viscosity of the polyurethane glue is increased to make the bonding between the spring and the rubber pad more firm.

[0043] In S3, the spring is compressed downward by 3-5%, that is, the height of the spring is compressed by 3-5%.

[0044] The above embodiments are only used to illustrate the technical concept and features of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly. It cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A tool for bonding a spring and a rubber pad, comprising a base (6) and a compression assembly (9), characterized in that: The base (6) is provided with a bottom groove (66), the bottom groove (66) is bent and extends to two ends of the base (6), the extension path of the bottom groove (66) is consistent with the extension path of the rubber pad, the bottom groove (66) is used to hold the rubber pad, and the bottom end of the spring is used to stick the rubber pad; The compression assembly (9) comprises a vertical rod (91) and a pressure block (92); the vertical rod (91) is arranged on the base (6); the vertical rod (91) is used for the spring to pass through; the pressure block (92) is slidably arranged on the vertical rod (91); the pressure block (92) is used for compressing the upper end of the spring.

2. The tooling for bonding springs and rubber pads according to claim 1, characterized in that: The base (6) is provided with an avoidance area (64), and the avoidance area (64) is located between the two ends of the bottom groove (66).

3. The tooling for bonding springs and rubber pads according to claim 1, characterized in that: The base (6) is provided with a through hole (69), and the vertical rod (96) is sleeved in the through hole (69).

4. The tooling for bonding springs and rubber pads according to claim 3, characterized in that: A sinking platform (65) is also provided in the through hole (69), and the sinking platform (65) is located at the bottom of the base (6). A bottom ring (93) is provided at the bottom of the vertical rod (91), and the bottom ring (93) is clamped on the sinking platform (65).

5. The tooling for bonding springs and rubber pads according to claim 1, characterized in that: The compression assembly (9) further comprises an inner ring (94), the inner ring (94) being slidably disposed on the vertical rod (96), the inner ring (94) being disposed at the bottom of the compression block (99), and the outer diameter of the compression block (99) being greater than the outer diameter of the inner ring (94).

6. The tooling for bonding springs and rubber pads according to claim 1, characterized in that: The compression assembly (9) further comprises a limiting rod (95), the vertical rod (96) being provided with a plurality of height holes (96) in the vertical direction, the limiting rod (95) being used to pass through the height holes (96), and the limiting rod (95) being also used to press on the top end of the compression block 92.

7. A process for bonding a spring and a rubber pad, characterized in that: include: S1. Design the rubber pad according to the shape of the bottom end of the spring, and there is a spring groove on the rubber pad; S2. Apply glue to the bottom end of the spring and the spring groove, and the bottom end of the spring is set in the spring groove; S3, compress the spring downwards so that the bottom end of the spring is bonded to the spring groove by glue; S4, maintain the compression state for 5-30 minutes; S5. Release the spring.

8. The process for bonding springs or rubber pads according to claim 7, characterized in that: In S2, an active agent is pre-coated on the bottom end of the spring and in the spring groove.

9. The process for bonding a spring and a rubber pad according to claim 7, characterized in that: In S2, polyurethane glue is used as glue.

10. The process for bonding a spring and a rubber pad according to claim 7, characterized in that: In S3, the spring is compressed downward by 3-5%.

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