Valve oil seal pressing tool

Abstract

The utility model discloses a valve oil seal press -packaging frock belongs to valve oil seal installation technical field, has solved current valve oil seal installation mode assembly efficiency problem. The valve oil seal press -packaging frock, including press -packaging body, be equipped with first step hole on the press -packaging body, be equipped with internal thread on the inner wall of first step hole, first step hole internal thread be connected with threaded connection sleeve, the top of first step hole is equipped with second step hole, the diameter of second step hole is less than the diameter of first step hole, just the first step hole with second step hole between form has the step face, the end surface of threaded connection sleeve and step face are attached, the inner diameter of second step hole is less than the inner diameter of threaded connection sleeve, be equipped with rubber pad on the step face of threaded connection sleeve inboard, the top of press -packaging body is equipped with the stamping device. The utility model discloses a valve oil seal press -packaging frock, effectively improves assembly efficiency.

Description

Technical Field

[0001] This utility model relates to the field of valve stem seal installation technology, and more specifically, it relates to a valve stem seal press-fitting tool. Background Technology

[0002] As a core sealing component of the engine's valve train, the valve stem seal's function is to prevent engine oil from seeping into the combustion chamber through the valve guide gap, while also preventing high-temperature exhaust gases from backflowing into the engine. The quality of the seal's installation directly affects the engine's oil consumption, emissions, and the lifespan of the valve assembly. Misalignment, lip damage, or incorrect insertion depth during installation can easily lead to seal failure, causing serious malfunctions such as oil burning, increased carbon buildup, and even valve sticking.

[0003] The existing method for installing valve stem seals involves creating a round bar of suitable size based on the dimensions of the valve stem seal mounting holes. During assembly, the valve stem seal is carefully placed into the mounting hole by hand, one end of the round bar is used to hold the valve stem seal in place, and then the other end of the round bar is gently tapped with a rubber mallet to carefully hammer the valve stem seal into place. This installation method is time-consuming, has low assembly efficiency, and cannot guarantee the alignment of the valve stem seal, making it difficult to guarantee the assembly accuracy of the valve stem seal. This also poses a safety hazard to the engine. Furthermore, different diameter round bars are required to be made for different valve stem seal mounting hole dimensions in the engine cylinder head, which increases the assembly cost. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a valve stem seal press-fitting fixture that addresses the above-mentioned shortcomings of the prior art. This fixture can quickly install valve stem seals, effectively improve assembly efficiency, and is applicable to the installation of valve stem seals of various sizes, thereby improving the scope of application and reducing manufacturing costs.

[0005] The technical solution of this utility model is as follows: a valve stem seal press-fitting fixture includes a press-fitting body, wherein the press-fitting body is provided with a first stepped hole, the inner wall of the first stepped hole is provided with an internal thread, a threaded connecting sleeve is connected to the internal thread of the first stepped hole, a second stepped hole is provided at the top of the first stepped hole, the diameter of the second stepped hole is smaller than the diameter of the first stepped hole, and a stepped surface is formed between the first stepped hole and the second stepped hole, the end face of the threaded connecting sleeve is in contact with the stepped surface, the inner diameter of the second stepped hole is smaller than the inner diameter of the threaded connecting sleeve, a rubber pad is provided on the stepped surface on the inner side of the threaded connecting sleeve, a stamping device is provided at the top of the press-fitting body, the stamping device includes a sleeve and a movable rod, the movable rod is movably inserted into the sleeve, and the movable rod and the sleeve are clearance-fitted, a pressure head adapted to the sleeve is provided at the bottom of the movable rod, and the pressure head is movably inserted into the sleeve.

[0006] Furthermore, the pressure head is provided with at least one vent hole that extends axially through the pressure head.

[0007] Furthermore, the top of the movable rod is provided with a "T"-shaped handle.

[0008] Furthermore, a protective pad is provided on the outer wall surface of the handle.

[0009] Furthermore, the bottom of the sleeve is provided with a spherical surface, and the bottom of the pressure head is provided with an arc-shaped groove that conforms to the spherical surface.

[0010] Furthermore, the central axes of the first stepped hole, the second stepped hole, the spherical surface, and the arc-shaped groove are all on the same straight line.

[0011] Furthermore, the upper circumferential surface of the press-fit body has anti-slip texture.

[0012] Beneficial effects

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] 1. This utility model provides a valve stem seal press-fitting fixture, which installs the valve stem seal in the threaded connection sleeve and makes the end face of the valve stem seal fit against the stepped surface. By using the handle, the movable rod is moved downward and the pressure head impacts the bottom of the sleeve, so that the press-fitting body is subjected to downward pressure, thereby achieving the purpose of quickly installing the valve stem seal and effectively improving assembly efficiency.

[0015] 2. The present invention provides a valve stem seal press-fitting fixture in which the threaded connecting sleeve and the press-fitting body are detachably connected by a threaded connection. The threaded connecting sleeve can be replaced with one that is compatible with the size of the valve stem seal, thereby expanding the scope of application. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural diagram of the present invention;

[0017] Figure 2 for Figure 1 Enlarged structural diagram of A in the middle;

[0018] Figure 3 This is an enlarged cross-sectional view of the pressure head in this utility model.

[0019] Wherein: 1-press body, 2-first step hole, 3-second step hole, 4-threaded connection sleeve, 5-rubber pad, 6-sleeve, 7-moving rod, 8-press head, 9-ventilation hole, 10-handle, 11-protective pad, 12-spherical surface, 13-arc groove, 14-step surface. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.

[0021] See Figure 1-3 A valve stem seal press-fitting fixture includes a press-fitting body 1. The press-fitting body 1 has a first stepped hole 2, and the inner wall of the first stepped hole 2 has an internal thread. A threaded connecting sleeve 4 is connected to the internal thread of the first stepped hole 2. During press-fitting, the valve stem seal is installed in the threaded connecting sleeve 4. The threaded connecting sleeve 4 and the press-fitting body 1 are detachably connected by a threaded connection. The threaded connecting sleeve 4 can be replaced with one that is suitable for the size of the valve stem seal, thus expanding the application range of the fixture. A second stepped hole 3 is provided at the top of the first stepped hole 2. The diameter of the second stepped hole 3 is smaller than the diameter of the first stepped hole 2, and the diameter of the second stepped hole 3 is larger than the diameter of the valve stem. During the press-fitting of the valve stem seal, it makes way for the valve stem. The first stepped hole 2 and the second stepped hole 3 are connected by a threaded connecting sleeve 4. A stepped surface 14 is formed between the two stepped holes 3. The end face of the threaded connecting sleeve 4 fits against the stepped surface 14. The inner diameter of the second stepped hole 3 is smaller than the inner diameter of the threaded connecting sleeve 4. A rubber pad 5 is provided on the stepped surface inside the threaded connecting sleeve 4. During press fitting, the valve oil seal will be subjected to downward pressure from the press fitting body 1. The rubber pad 5 on the stepped surface 14 can play a buffering role to prevent the valve oil seal from deforming and being damaged during the press fitting process. A stamping device is provided at the top of the press fitting body 1. The stamping device includes a sleeve 6 and a movable rod 7. The movable rod 7 is movably inserted into the sleeve 6, and the movable rod 7 and the sleeve 6 are clearance fit. A pressure head 8 adapted to the sleeve 6 is provided at the bottom of the movable rod 7. The pressure head 8 is movably inserted into the sleeve 6.

[0022] During press-fitting, the valve stem seal is first installed inside the threaded connecting sleeve 4, with the end face of the valve stem seal in contact with the stepped surface 14. Then, it is aligned with the valve stem to be installed. At this time, the operator holds the press shaft body 1 with one hand and the handle 10 with the other. Then, the movable rod 7 is moved downward through the handle 10, and the press head 8 impacts the bottom of the sleeve 6, so that the press body 1 is subjected to downward pressure, thereby moving the valve stem seal downward, thus achieving the purpose of installing the valve stem seal onto the valve stem. The downward force generated by the impact of the press head 8 and the bottom of the sleeve 6 achieves the purpose of quickly installing the valve stem seal, effectively improving assembly efficiency. This tooling can be adapted to valve stem seals of various sizes by changing the threaded connecting sleeve 4 of different sizes, effectively improving its applicability.

[0023] In this embodiment, the pressure head 8 is provided with at least one vent hole 9 that axially penetrates the pressure head 8. When the pressure head 8 is pressed down, the space between the pressure head 8 and the bottom of the sleeve 6 is reduced. The air volume inside remains unchanged, which will cause a certain resistance to the stamping. Therefore, when the pressure head 8 is pressed down, the air can be discharged from the vent hole 9.

[0024] In this embodiment, the top of the movable rod 7 is provided with a "T"-shaped handle 10, which makes it easy for the operator to grip the movable rod 7.

[0025] In this embodiment, a protective pad 11 is provided on the outer wall of the handle 10. The protective pad 11 can be a flexible material with cushioning properties, such as rubber. When the operator installs the valve stem seal, he / she needs to hold the handle 10. When he / she exerts force downward, the pressure head 8 impacts the spherical surface 12 at the bottom of the sleeve 6. The shock generated during the impact will be fed back to the operator's hand. When installing multiple valve stem seals, the long-term shock will cause the operator's hand to become numb. The protective pad 11 can play a certain shock absorption role and provide a certain degree of protection for the operator.

[0026] In this embodiment, the bottom of the sleeve 6 is provided with a spherical surface 12, and the bottom of the pressure head 8 is provided with an arc groove 13 adapted to the spherical surface 12, so that the pressure body 1 is subjected to uniform force, the impact force is evenly distributed, and some stress concentration is reduced, effectively extending the service life of the device; and when impacted, the spherical structure formed by the spherical surface 12 and the arc groove 13 can reduce the rebound caused by the impact.

[0027] In this embodiment, the central axes of the first stepped hole 2, the second stepped hole 3, the spherical surface 12, and the arc groove 13 are all on the same straight line, ensuring that the valve stem seal is subjected to uniform force during press-fitting and avoiding displacement during the press-fitting process, which could lead to damage to the valve stem seal or valve rod.

[0028] In this embodiment, the anti-slip texture on the circumferential surface of the upper part of the pressing body 1 prevents the operator's hand from slipping during the pressing process when the valve oil seal is pressed.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present utility model. These modifications and improvements will not affect the effectiveness of the present utility model or the practicality of the patent.

Claims

1. A valve seal press tool characterized by, The device includes a press-fitting body (1), which has a first stepped hole (2) on its surface. The inner wall of the first stepped hole (2) has an internal thread. A threaded connecting sleeve (4) is connected to the internal thread of the first stepped hole (2). A second stepped hole (3) is located at the top of the first stepped hole (2). The diameter of the second stepped hole (3) is smaller than the diameter of the first stepped hole (2). A stepped surface (14) is formed between the first stepped hole (2) and the second stepped hole (3). The end face of the threaded connecting sleeve (4) is in contact with the stepped surface (14). The inner diameter of the second step hole (3) is smaller than the inner diameter of the threaded connecting sleeve (4). A rubber pad (5) is provided on the step surface (14) on the inner side of the threaded connecting sleeve (4). A stamping device is provided on the top of the press-fit body (1). The stamping device includes a sleeve (6) and a movable rod (7). The movable rod (7) is movably inserted into the sleeve (6), and the movable rod (7) and the sleeve (6) are clearance-fitted. A pressure head (8) adapted to the sleeve (6) is provided at the bottom of the movable rod (7). The pressure head (8) is movably inserted into the sleeve (6).

2. The valve oil seal press tool of claim 1, wherein, The pressure head (8) is provided with at least one vent hole (9) that axially penetrates the pressure head (8).

3. The valve oil seal press tool of claim 1, wherein, The top of the movable rod (7) is provided with a "T"-shaped handle (10).

4. The valve oil seal press tool of claim 3, wherein, The outer wall surface of the handle (10) is provided with a protective pad (11).

5. The valve oil seal press tool of claim 1, wherein, The bottom of the sleeve (6) is provided with a spherical surface (12), and the bottom of the pressure head (8) is provided with an arc groove (13) that is adapted to the spherical surface (12).

6. The valve oil seal press tool of claim 5, wherein, The central axes of the first stepped hole (2), the second stepped hole (3), the spherical surface (12), and the arc groove (13) are all on the same straight line.

7. The valve oil seal press tool of claim 1, wherein, The upper circumferential surface of the press-fit body (1) has anti-slip texture.

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