Injection molding type nitrogen spring guide ring press fitting tool

Abstract

The utility model discloses an injection molding type nitrogen spring guide ring press fitting tool, and relates to the technical field of nitrogen spring machining equipment. The guide ring comprises a supporting cylinder, a piston rod is arranged at the top of the supporting cylinder, and a guide ring body is arranged on one side of the supporting cylinder. A guide assembly is arranged on one side of the supporting cylinder and comprises a conical cylinder arranged on one side of the supporting cylinder. Through the cooperation of the guide assembly and the lubricating assembly, the installation efficiency and quality of the nitrogen spring guide ring are remarkably improved, firstly, the guide ring is effectively pretreated through the design of the conical barrel and the annular heater in the guide assembly, the guide ring is not prone to deformation in the installation process, the crack problem caused by extrusion in a traditional installation mode is avoided, and the installation efficiency is improved; and secondly, due to the use of the lubricating assembly, the friction between the guide ring and the piston rod is reduced, the installation smoothness is improved, the stable installation of the guide ring is ensured, and the service life of the nitrogen spring is prolonged.

Description

Technical Field

[0001] This utility model belongs to the technical field of nitrogen spring processing equipment, and in particular relates to a tooling for pressing a guide ring of an injection-molded nitrogen spring. Background Technology

[0002] During the operation of a nitrogen spring, the piston reciprocates linearly within the cylinder. The guide ring provides precise guidance to the piston, ensuring it moves along the central axis of the cylinder and preventing deflection. When the nitrogen spring is subjected to lateral forces (such as in applications under complex stress environments), the guide ring can disperse or limit these forces within a certain range, minimizing interference with the piston's axial movement. This helps maintain the stability of the nitrogen spring's performance and extends its service life.

[0003] Currently, the guide ring installation method for nitrogen spring pistons is mostly to place the guide ring on the piston surface and use external tools to push the guide ring, causing it to move along the piston surface and lock into the groove. However, the guide ring is usually made of composite material injection molding, which has low elasticity at room temperature. When subjected to compression, it is prone to deformation and cracking, which greatly reduces the service life of the guide ring.

[0004] To address these issues, we provide an injection-molded nitrogen spring guide ring press-fitting fixture. Utility Model Content

[0005] The purpose of this invention is to provide a tooling for pressing a nitrogen spring guide ring in injection molding. By cooperating with the guide assembly and the lubrication assembly, it solves the problem that the guide ring installation method of the nitrogen spring piston in the prior art is prone to extrusion deformation of the guide ring, which leads to cracks.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model relates to a press-fit fixture for injection-molded nitrogen spring guide rings, comprising a support cylinder with a piston rod at the top and a guide ring body on one side. A guide assembly is also provided on one side of the support cylinder, comprising a conical cylinder on one side, a first annular heater and a second annular heater mounted on the surface of the conical cylinder, and a circular groove at the bottom of the conical cylinder. The guide assembly preheats and guides the guide ring body. A lubrication assembly is provided inside the support cylinder, comprising a cylinder mounted at the top of the conical cylinder, a drain hole on one side of the cylinder, and a sealing plate slidably connected inside the cylinder. The lubrication assembly lubricates the installation of the guide ring body.

[0008] The present invention is further configured such that a bracket is provided on one side of the support cylinder, and a rotating rod is movably connected inside the bracket via a bearing.

[0009] The present invention is further configured such that a push rod is fixedly connected to the bottom of the rotating rod, and a rotating wheel is fixedly connected to the top of the rotating rod.

[0010] The present invention is further configured such that the lubrication assembly includes a square post mounted on the top of the sealing sheet, a disc fixedly connected to the top of the square post, and a support plate fixedly connected to the top of the disc.

[0011] The present invention is further configured such that a reset spring is sleeved on the surface of the square column, and one end of the reset spring is fixedly connected to the disc.

[0012] The present invention is further configured such that the first annular heater and the second annular heater are designed with an inclined surface, and the maximum diameter of the conical cylinder is the same as the diameter of the piston rod.

[0013] The present invention is further configured such that a placement groove is provided at the top of the support cylinder, and a base is fixedly connected to the bottom of the bracket.

[0014] The present invention has the following beneficial effects.

[0015] 1. This utility model significantly improves the installation efficiency and quality of nitrogen spring guide rings through the cooperation of guide components and lubrication components. First, the design of the conical cylinder and annular heater in the guide component effectively pre-treats the guide ring, making it less prone to deformation during installation and avoiding the cracking problem caused by compression in traditional installation methods. Second, the use of the lubrication component reduces the friction between the guide ring and the piston rod, improves the smoothness of installation, ensures the stable installation of the guide ring, and thus extends the service life of the nitrogen spring.

[0016] 2. The design of this utility model takes into account the convenience and safety of operation. Through the design of the rotating rod, pushing rod and rotating wheel, the operator can easily push the installation process of the guide ring, reducing labor intensity. The design of the return spring ensures the automatic reset of the lubrication component, simplifying the operation steps. The overall design not only improves work efficiency, but also reduces operational risks, making the production of nitrogen springs more reliable and efficient.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1This is a three-dimensional view of a tooling for press-fitting a nitrogen spring guide ring in injection molding.

[0020] Figure 2 This is a cross-sectional view of a conical cylinder and a cylindrical cylinder in an injection-molded nitrogen spring guide ring press-fitting fixture.

[0021] Figure 3 This is a cross-sectional view of the support cylinder and bracket in a nitrogen spring guide ring press-fitting fixture.

[0022] Figure 4 This is a schematic diagram of the installation of the guide ring body in a press-fit fixture for injection-molded nitrogen spring guide rings.

[0023] Figure 5 This is a schematic diagram of the preheating of the guide ring body in a nitrogen spring guide ring press-fitting fixture.

[0024] In the attached diagram: 1. Support cylinder; 2. Piston rod; 3. Guide ring body; 4. Guide assembly; 401. Conical cylinder; 402. First annular heater; 403. Second annular heater; 404. Circular groove; 5. Lubrication assembly; 501. Cylinder; 502. Drain hole; 503. Sealing plate; 6. Bracket; 7. Rotating rod; 8. Push rod; 9. Rotating wheel; 504. Square column; 505. Disc; 506. Support plate; 10. Return spring; 11. Placement groove; 12. Base. Detailed Implementation

[0025] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Example 1

[0027] Please see Figures 1-5This utility model relates to a press-fit fixture for injection-molded nitrogen spring guide rings, comprising a support cylinder 1, a piston rod 2 at the top of the support cylinder 1, and a guide ring body 3 on one side of the support cylinder 1; a guide assembly 4 is provided on one side of the support cylinder 1, the guide assembly 4 including a conical cylinder 401 disposed on one side of the support cylinder 1, and a first annular heater 402 and a second annular heater 403 mounted on the surface of the conical cylinder 401. Both the first annular heater 402 and the second annular heater 403 operate through the current heating effect. When the internal heating wire (such as a nickel-chromium alloy wire) is energized, it generates heat due to its own resistance. The current causes electrons to move in a directional manner, and the electrons collide with the atoms of the resistance wire, converting electrical energy into heat energy. The heat is dissipated to heat the object being heated. When the guide ring body 3 is fitted onto the surface of the heater, the heater can be used to preheat the guide ring body 3, improving the smoothness of installation. The circular heating element located at the bottom of the conical cylinder 401... The groove 404 preheats and guides the guide ring body 3 through the guide assembly 4; the support cylinder 1 is equipped with a lubrication assembly 5, which includes a cylinder 501 installed on the top of the conical cylinder 401. Lubricating oil is injected into the cylinder 501 and located at the bottom of the sealing plate 503. During the installation of the guide ring body 3, it can be discharged to lubricate the installation of the guide ring body 3. A drain hole 502 is opened on one side of the cylinder 501. The sealing plate 503 is slidably connected to the inner wall of the cylinder 501 and can push the lubricating oil. There are two push rods 8, which are slidably connected to the sealing plate 503 inside the cylinder 501. The installation of the guide ring body 3 is lubricated through the lubrication assembly 5. The first annular heater 402 and the second annular heater 403 are designed with an inclined surface. When pushing the guide ring body 3, the inclined surface design can be used to increase the inner diameter of the guide ring body 3. The support cylinder 1 is used to place the piston rod 2.

[0028] Example 2

[0029] Please see Figures 1-5Based on Embodiment 1, a bracket 6 is provided on one side of the support cylinder 1. A rotating rod 7 is movably connected inside the bracket 6 via a bearing. A push rod 8 is fixedly connected to the bottom of the rotating rod 7, and a rotating wheel 9 is fixedly connected to the top of the rotating rod 7. The lubrication assembly 5 also includes a square column 504 mounted on the top of the sealing plate 503, a disc 505 fixedly connected to the top of the square column 504, and a support plate 506 fixedly connected to the top of the disc 505. When the support plate 506 is inserted between the two sets of push rods 8, the rotating rod 7 can be rotated, causing the push rods 8 and the support plate 506 to rotate, thus... The conical cylinder 401 can also rotate, making it easier for the guide ring body 3 to fit more smoothly onto the surface of the piston rod 2. A return spring 10 is fitted on the surface of the square column 504. The return spring 10 has the function of compression and energy storage, which can reset the disc 505. One end of the return spring 10 is fixedly connected to the disc 505. The first annular heater 402 and the second annular heater 403 are designed with an inclined surface. The maximum diameter of the conical cylinder 401 is the same as the diameter of the piston rod 2. The top of the support cylinder 1 is provided with a placement groove 11, and the bottom of the bracket 6 is fixedly connected to the base 12.

[0030] The working principle of this utility model is as follows: When the guide ring body 3 needs to be installed, the operator can first put the guide ring body 3 on the surface of the conical cylinder 401, and then move the conical cylinder 401 to lock the circular groove 404 at the bottom of the conical cylinder 401 into the top of the piston rod 2. Figure 4 As shown, manually press down on the disc 505 and the square column 504. The square column 504 drives the sealing plate 503 to move downward to squeeze the lubricating oil and discharge it through the drain hole 502 to lubricate the guide ring body 3.

[0031] Then, the guide ring body 3 is pushed downwards, bringing it into contact with the first annular heater 402. The first annular heater 402 is then activated to preheat the guide ring body 3. The guide ring material absorbs heat, intensifying the internal molecular thermal motion and increasing the intermolecular distance, causing the overall volume of the guide ring body 3 to expand and its diameter to increase. Then, the guide ring body 3 is pushed downwards along the surface of the conical cylinder 401, bringing it into contact with the second annular heater 403 for secondary preheating. After preheating, the guide ring body 3 is pushed downwards again, gradually expanding it. The guide ring, which was originally difficult to insert due to its interference fit with the surface of the piston rod 2, becomes easier to fit into the surface of the piston rod 2 due to its increased size. When the guide ring body 3 is inserted into the piston rod 2 to the predetermined position, it gradually cools and shrinks over time, tightly wrapping around the surface of the piston rod 2, achieving a stable installation and ensuring the proper functioning of the nitrogen spring's guiding function.

[0032] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A tooling for press-fitting a nitrogen spring guide ring for injection molding, comprising a support cylinder (1), characterized in that: A piston rod (2) is provided at the top of the support cylinder (1), and a guide ring body (3) is provided on one side of the support cylinder (1). A guide assembly (4) is provided on one side of the support cylinder (1). The guide assembly (4) includes a conical cylinder (401) provided on one side of the support cylinder (1), a first annular heater (402) and a second annular heater (403) installed on the surface of the conical cylinder (401), and a circular groove (404) opened at the bottom of the conical cylinder (401). The guide assembly (4) preheats and guides the guide ring body (3). The support cylinder (1) is provided with a lubrication assembly (5). The lubrication assembly (5) includes a cylinder (501) installed on the top of the conical cylinder (401), a drain hole (502) opened on one side of the cylinder (501), and a sealing plate (503) slidably connected to the inside of the cylinder (501). The lubrication assembly (5) lubricates the installation of the guide ring body (3).

2. The injection molding nitrogen spring guide ring press-fitting fixture according to claim 1, characterized in that: A bracket (6) is provided on one side of the support cylinder (1), and a rotating rod (7) is movably connected inside the bracket (6) through a bearing.

3. The injection molding nitrogen spring guide ring press-fitting fixture according to claim 2, characterized in that: The bottom of the rotating rod (7) is fixedly connected to a push rod (8), and the top of the rotating rod (7) is fixedly connected to a wheel (9).

4. The injection molding nitrogen spring guide ring press-fitting fixture according to claim 1, characterized in that: The lubrication assembly (5) further includes a square post (504) mounted on the top of the sealing plate (503), a disc (505) fixedly connected to the top of the square post (504), and a support plate (506) fixedly connected to the top of the disc (505).

5. The injection molding nitrogen spring guide ring press-fitting fixture according to claim 4, characterized in that: A reset spring (10) is fitted on the surface of the square column (504), and one end of the reset spring (10) is fixedly connected to the disc (505).

6. The injection molding nitrogen spring guide ring press-fitting fixture according to claim 1, characterized in that: The first annular heater (402) and the second annular heater (403) are designed with an inclined surface, and the maximum diameter of the conical cylinder (401) is the same as the diameter of the piston rod (2).

7. The injection molding nitrogen spring guide ring press-fitting fixture according to claim 2, characterized in that: The support cylinder (1) has a placement groove (11) at the top, and the bracket (6) has a base (12) fixedly connected to the bottom.

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