Tool for assembling special-shaped check ring

Abstract

The tool for assembling the special-shaped check ring comprises a guide seat, a pressing head and a pressing disc, one end of the pressing head is connected with the pressing disc in a threaded mode, the other end of the pressing head is connected to the guide seat in a sliding mode, and a positioning block used for limiting the pressing-in depth of the guide seat is arranged at the top of the guide seat. A large-diameter face, a guide face and a small-diameter face are sequentially distributed on the inner side of the guide seat from top to bottom, the inner diameter of the large-diameter face is larger than that of the small-diameter face, and an outer step face matched with an inner cavity of the valve body is arranged on the outer side of the guide seat. When the special-shaped check ring is installed, the guide seat is placed in the valve body, the special-shaped check ring is placed in the valve body from a large-diameter face, a worker holds the pressing disc by hand, the pressing head presses the special-shaped check ring downwards, an outer ring of the special-shaped check ring is forced to contract and enter a small-diameter face through the guide face, and the special-shaped check ring is installed. And at the moment, the special-shaped check ring is reset and clamped into the check ring groove of the valve body, so that the requirement for manually assembling the special-shaped check ring is met, and the assembling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of assembly tools, and particularly relates to a tool for assembling a special-shaped retaining ring. Background Art

[0002] In a mechanical structure, a retaining ring needs to be placed in a valve body to limit the movement range of components such as a valve stem and a seal. When installing a traditional retaining ring, the retaining ring is usually compressed by pliers and installed into the valve body. However, when installing a special-shaped retaining ring, due to the complex structure of the special-shaped retaining ring, it is difficult to install by traditional installation methods, and it is easy to occur the phenomena of incomplete installation and easy scratching of the valve body surface. Therefore, a tool for assembling a special-shaped retaining ring is needed to improve the installation efficiency of the special-shaped retaining ring. Summary of the Utility Model

[0003] In order to overcome the deficiencies of the background art, the technical solution adopted by the utility model is: a tool for assembling a special-shaped retaining ring, which includes a guide seat, a pressing head, and a pressing plate. One end of the pressing head is threadedly connected with the pressing plate, and the other end is slidably connected to the guide seat. A positioning block for limiting the pressing depth of the guide seat is arranged on the top of the guide seat. The inner side of the guide seat is provided with a large-diameter surface, a guiding surface, and a small-diameter surface which are distributed in sequence from top to bottom, and the inner diameter of the large-diameter surface is greater than that of the small-diameter surface. The outer side of the guide seat is provided with an outer stepped surface adapted to the inner cavity of the valve body.

[0004] By adopting the above technical solution, when installing a special-shaped retaining ring, the guide seat is placed into the valve body, the special-shaped retaining ring is placed from the large-diameter surface, the staff holds the pressing plate, and the pressing head presses down the special-shaped retaining ring. The outer ring of the special-shaped retaining ring is forced to contract and enter the small-diameter surface through the guiding surface until the pressing head pushes the special-shaped retaining ring out of the guide seat. At this time, the special-shaped retaining ring resets and is clamped into the retaining ring groove of the valve body, so as to meet the manual assembly of the special-shaped retaining ring and improve the assembly efficiency.

[0005] The utility model is further arranged as follows: the outer stepped surface includes a first stepped surface, a second stepped surface whose outer diameters decrease in sequence from top to bottom, and a centering surface for clamping the valve body; through the limiting of the first stepped surface, the second stepped surface, and the centering surface one by one, when the guide seat is pressed down, the axis of the guide seat gradually approaches the axis of the valve body. Until the centering surface is clamped with the valve body, the axis of the guide seat coincides with the axis of the valve body, and the overall structure is simple and the installation is convenient.

[0006] The utility model is further arranged as follows: the guiding surface is an inclined surface that slopes downward in the direction of the axis of the guide seat; the large-diameter surface, the guiding surface, and the small-diameter surface of the guide seat are integrally machined by a lathe, so that the connection between the guiding surface and the large-diameter surface and the small-diameter surface is natural, and the special-shaped retaining ring is prevented from jamming during the pressing process.

[0007] The present utility model is further configured such that the pressing head is provided with a threaded hole, the pressing disc is provided with a threaded post adapted to the threaded hole, and the pressing disc is threadedly connected to the pressing head through the threaded hole. The outer diameter of the pressing head is not greater than the small-diameter surface.

[0008] The present utility model is further configured such that the side surface of the pressing disc is provided with knurling patterns; the knurling patterns facilitate the manual installation of the pressing disc.

[0009] The present utility model also provides a valve body. The valve body is provided with an inner stepped surface for installing a guide seat. The bottom of the inner stepped surface is provided with a mounting surface adapted to the centering surface, and the mounting surface is provided with a retaining ring groove for installing a special-shaped retaining ring.

[0010] The present utility model is further configured such that the depth h of the retaining ring groove is not less than the height H of the outer stepped surface.

[0011] Adopting the above technical solution, when the guide seat is placed in the valve body, by controlling the depth of the retaining ring groove of the valve body and the height of the outer stepped surface, when the positioning block abuts against the valve body, the bottom surface of the guide seat is exactly located at the retaining ring groove, thereby ensuring that the special-shaped retaining ring is assembled in place.

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

[0013] When installing the special-shaped retaining ring, the guide seat is placed in the valve body. The special-shaped retaining ring is pressed down by the pressing head, and the outer ring of the special-shaped retaining ring is forced to contract and enter the small-diameter surface through the guiding surface until the pressing head pushes the special-shaped retaining ring out of the guide seat. At this time, the special-shaped retaining ring resets and is clamped into the retaining ring groove of the valve body, thereby meeting the requirement of manual assembly of the special-shaped retaining ring, improving the assembly efficiency, and ensuring that the special-shaped retaining ring is assembled in place.

[0014] The following further describes the embodiments of the present utility model with reference to the accompanying drawings. Description of the Drawings

[0015] Figure 1 is a cross-sectional view of the present utility model;

[0016] Figure 2 is a cross-sectional view of the guide seat of the present utility model;

[0017] Figure 3 In the present utility model Figure 2 is a partial enlarged view of the A-direction view;

[0018] Figure 4 is a schematic structural view when the guide seat and the valve body of the present utility model are installed;

[0019] Wherein: 1 - guide seat, 2 - pressure head, 3 - pressure plate, 4 - valve body, 5 - special-shaped retaining ring, 11 - positioning block, 12 - large-diameter surface, 13 - guiding surface, 14 - small-diameter surface, 15 - outer stepped surface, 16 - first step surface, 17 - second step surface, 18 - centering surface, 21 - threaded hole, 31 - threaded post, 32 - knurled pattern, 41 - inner stepped surface, 42 - mounting surface, 43 - retaining ring groove; Detailed implementation manner

[0020] Such as Figure 1 , 2 As shown in [relevant figures], this embodiment provides a special-shaped retaining ring assembly tooling, including a guide seat 1, a pressure head 2 and a pressure plate 3. One end of the pressure head 2 is threadedly connected to the pressure plate 3, and the other end is slidably connected to the guide seat 1. The top of the guide seat 1 is provided with a positioning block 11 for limiting the pressing depth of the guide seat 1. The inner side of the guide seat 1 is provided with a large-diameter surface 12, a guiding surface 13 and a small-diameter surface 14 which are distributed in sequence from top to bottom, and the inner diameter of the large-diameter surface 12 is greater than that of the small-diameter surface 14. The outer side of the guide seat 1 is provided with an outer stepped surface 15 adapted to the inner cavity of the valve body 4.

[0021] In this embodiment, the outer stepped surface 15 includes a first step surface 16 and a second step surface 17 whose outer diameters gradually decrease from top to bottom, and a centering surface 18 for clamping the valve body 4. Through the sequential limiting of the first step surface 16, the second step surface 17 and the centering surface 18, during the downward pressing process of the guide seat 1, the axis of the guide seat 1 gradually approaches the axis of the valve body 4. When the centering surface 18 is clamped with the valve body 4, the axis of the guide seat 1 coincides with the axis of the valve body 4. The overall structure is simple and the installation is convenient.

[0022] In this embodiment, the guiding surface 13 is an inclined surface that slopes downward in the direction of the axis of the guide seat 1. The large-diameter surface 12, the guiding surface 13 and the small-diameter surface 14 of the guide seat 1 are integrally machined by a lathe, so that the connection between the guiding surface 13 and the large-diameter surface 12 and the small-diameter surface 14 is natural, avoiding jamming of the special-shaped retaining ring 5 during the downward pressing process.

[0023] In this embodiment, the pressure head 2 is provided with a threaded hole 21, the pressure plate 3 is provided with a threaded post 31 adapted to the threaded hole 21, and the pressure plate 3 is threadedly connected to the pressure head 2 through the threaded hole 21. The outer diameter of the pressure head 2 is not greater than that of the small-diameter surface 14. The side surface of the pressure plate 3 is provided with a knurled pattern 32. The knurled pattern 32 facilitates the manual installation of the pressure plate 3.

[0024] Combined with Figure 3 , 4As shown in the figure, the present utility model also provides a valve body 4. The valve body 4 is provided with an inner stepped surface 41 for installing the guide seat 1. The bottom of the inner stepped surface 41 is provided with an installation surface 42 adapted to the centering surface 18, and the installation surface 42 is provided with a retaining ring groove 43 for installing the special-shaped retaining ring 5. The depth h of the retaining ring groove 43 is not less than the height H of the outer stepped surface 15.

[0025] The working principle of the present utility model is as follows: when installing the special-shaped retaining ring 5, the guide seat 1 is placed into the valve body 4, and the positioning block 11 abuts against the valve body 4. At this time, the bottom surface of the guide seat 1 is exactly located at the retaining ring groove 43. The special-shaped retaining ring 5 is placed from the large-diameter surface 12. The worker holds the pressure plate 3 and presses down the special-shaped retaining ring 5 through the pressing head 2. The outer ring of the special-shaped retaining ring 5 is forced to contract and enter the small-diameter surface 14 by the guiding surface 13 until the pressing head 2 pushes the special-shaped retaining ring 5 out of the guide seat 1. At this time, the special-shaped retaining ring 5 is reset and snapped into the retaining ring groove 43 of the valve body 4, thereby meeting the manual assembly of the special-shaped retaining ring 5 and improving the assembly efficiency.

[0026] The above are all the preferred embodiments of this application, and the protection scope of this application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A tool for assembling special-shaped retaining rings, characterized in that: The invention comprises a guide seat (1), a pressure head (2) and a pressure plate (3); one end of the pressure head (2) is threadedly connected to the pressure plate (3), and the other end is slidably connected to the guide seat (1); a positioning block (11) is provided on the top of the guide seat (1) for limiting the pressing depth of the guide seat (1); the inner side of the guide seat (1) is provided with a large diameter surface (12), a guide surface (13) and a small diameter surface (14) which are distributed in sequence from top to bottom, and the inner diameter of the large diameter surface (12) is larger than that of the small diameter surface (14); and the outer side of the guide seat (1) is provided with an outer stepped surface (15) which is adapted to the inner cavity of the valve body.

2. The tooling for assembling special-shaped retaining rings according to claim 1, characterized in that: The outer step surface (15) comprises a first step surface (16), a second step surface (17), and a centering surface (18) for clamping the valve body (4), the outer diameters of which decrease from top to bottom.

3. The tooling for assembling special-shaped retaining rings according to claim 1, characterized in that: The guide surface (13) is an inclined surface that is inclined downward toward the axial direction of the guide seat (1).

4. The tooling for assembling special-shaped retaining rings according to claim 1, characterized in that: The pressure head (2) is provided with a threaded hole (21), the pressure plate (3) is provided with a threaded column (31) matched with the threaded hole (21), the pressure plate (3) is threadedly connected to the pressure head (2) through the threaded hole (21), and the outer diameter of the pressure head (2) is not greater than the small diameter surface (14).

5. The tooling for assembling special-shaped retaining rings according to claim 4, characterized in that: The side surface of the pressure plate (3) is provided with a knurled mesh pattern (32).

6. A tool for assembling special-shaped retaining rings according to any one of claims 1 to 5, characterized in that: The valve body (4) is provided with an inner stepped surface (41) for mounting the guide seat (1), a mounting surface (42) adapted to the centering surface (18) is provided at the bottom of the inner stepped surface (41), and a retaining ring groove (43) for mounting a special-shaped retaining ring is provided on the mounting surface (42).

7. The tooling for assembling special-shaped retaining rings according to claim 6, characterized in that: The depth h of the retaining ring groove (43) is not less than the height H of the outer step surface (15).

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