Connecting structure of inflating valve cap and inflating valve rod

Abstract

The utility model discloses a connecting structure of an inflating valve cap and an inflating valve rod, which comprises a sealing cap and a valve rod, and the sealing cap is positioned at the end part of the valve rod and is connected with the valve rod in a clamping manner; a guide groove is formed in the sealing cap, and a clamping spring is arranged at the lower position in the guide groove. A first clamping groove and a second clamping groove are formed in the outer side of the top, connected with the sealing cap, of the nozzle rod, the second clamping groove is located below the first clamping groove, and the first clamping groove and the second clamping groove can be connected with the clamping spring in a clamped mode. The clamping spring is arranged in the sealing cap, and the first clamping groove and the second clamping groove are formed in the valve rod for clamping fit of the clamping spring, so that the valve rod of the inflating valve and the sealing cap are connected and assembled without traditional threaded connection, only the clamping spring and the clamping grooves need to be connected, and accurate positioning of the clamping spring can be guaranteed through the two sets of clamping grooves; tedious machining of threads in the nozzle rod and the sealing cap is omitted, and the machining cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile tires, and particularly relates to a connection structure between a valve cap and a valve stem. Background Technique

[0002] At present, automobile manufacturing enterprises at home and abroad are gradually standardizing the Tire Pressure Monitoring Sensor (TPMS) for automobile tires. The TPMS valve stem consists of a sealing cap and a stem. At present, the connection between the sealing cap and the valve stem in existing valve stems is a threaded connection, which requires the aid of special tools during assembly, making assembly and disassembly inconvenient. In addition, the thread processing is cumbersome, the processing cost is high, and the thread will slip after long-term use, resulting in the sealing cover falling off, thus causing corrosion or air leakage of the valve stem. For example, Figure 1 is the sealing cap of the traditional TPMS valve stem, and threads are provided on the inner side of the connection for threaded connection with the stem.

[0003] For another example, the patented technology with the patent publication number US10583703B2 and the patent name of a tire valve cap with an ABS thread shield specifically discloses that "the ABS insert adopts a unique snap ring design, with an anti-twist faucet, which can fix the insert in the external metal cap without twisting in the cavity of the metal outer cap. In addition, the cap includes a unique method of fixing the valve stem seal in place by using an overmolded seal (for example, a square o-ring) without falling off during use". The above patented technology is to fasten the valve cap with the insert, and the insert is then connected to the valve stem through threads.

[0004] Based on this, the present application discloses a connection structure between a valve cap and a valve stem to solve the above deficiencies. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is: how to solve the problems of cumbersome processing, high cost and thread slipping after long-term use when the traditional valve cap and valve stem are connected by screws.

[0006] To solve the above technical problem, the utility model provides the following technical solutions:

[0007] A connection structure between a valve cap and a valve stem, comprising a sealing cap and a stem, the sealing cap is located at the end of the stem and is snap-fitted with the stem;

[0008] A guiding groove is formed inside the sealing cap, and a snap ring is arranged at a position below the guiding groove;

[0009] A first clamping groove and a second clamping groove are formed in the outer side of the top of the nozzle rod connected to the sealing cap. The second clamping groove is located below the first clamping groove, and both the first clamping groove and the second clamping groove can be clamped and connected with a snap spring.

[0010] In this application, a snap spring is arranged inside the sealing cap, and the first clamping groove and the second clamping groove are arranged on the nozzle rod to be clamped and matched with the snap spring, so that the connection and assembly of the valve nozzle rod and the sealing cap do not require traditional threaded connection. Only the connection between the snap spring and the clamping groove needs to be realized, and the two clamping grooves can ensure the precise positioning of the snap spring. This application cancels the cumbersome processing of the threads in the nozzle rod and the sealing cap, reducing the processing cost.

[0011] As a further solution of the utility model: a rubber pad is installed at a position slightly above the inner side of the sealing cap.

[0012] As a further solution of the utility model: an overflow groove is reserved between the inner side of the snap spring and the inner wall of the sealing cap.

[0013] As a further solution of the utility model: the snap spring is integrally in an arc-shaped convex structure, and the convexity faces the center position of the sealing cap.

[0014] As a further solution of the utility model: an air overflow groove is formed at the top of the nozzle rod connected to the sealing cap, and the air overflow groove is located above the first clamping groove.

[0015] As a further solution of the utility model: an identification block is arranged on the outer side of the end of the nozzle rod connected to the sealing cap. The identification block is located below the second clamping groove, and the identification block can abut against the bottom wall of the sealing cap.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0017] First of all, in this application, a snap spring is arranged inside the sealing cap, and the first clamping groove and the second clamping groove are arranged on the nozzle rod to be clamped and matched with the snap spring, so that the connection and assembly of the valve nozzle rod and the sealing cap do not require traditional threaded connection. Only the connection between the snap spring and the clamping groove needs to be realized, and the two clamping grooves can ensure the precise positioning of the snap spring. This application cancels the cumbersome processing of the threads in the nozzle rod and the sealing cap, reducing the processing cost;

[0018] Secondly, in this application, a guiding snap spring and an overflow groove are designed on the side wall of the sealing cap, and an air overflow groove is designed on the nozzle rod. When the cap is assembled with the nozzle rod, the air inside the cap can be discharged, and it is not easy to form a vacuum between the cap and the side wall of the nozzle rod, which is convenient for assembly;

[0019] Finally, this application does not require the aid of special tools, and the assembly and disassembly are more convenient. In addition, anti-misalignment is provided between the nozzle rod and the sealing cap, that is, a self-centering guiding conical method is set between the nozzle rod and the sealing cap, and a small convex ring for marking the installation in place is also set. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of a traditional TPMS valve stem sealing cap;

[0021] Figure 2 It is a schematic structural diagram of the sealing cap of the embodiment of the present invention;

[0022] Figure 3 It is a schematic structural diagram of the nozzle rod of the embodiment of the present invention;

[0023] Figure 4 It is a partial cross-sectional view when the sealing cap of the embodiment of the present invention is fitted with the screw rod;

[0024] Explanation of reference numerals:

[0025] 1. Sealing cap; 11. Rubber gasket; 12. Guide groove; 13. Snap ring; 14. Overflow groove;

[0026] 2. Nozzle rod; 21. Air overflow groove; 22. First clamping groove; 23. Second clamping groove; 24. Identification block. Detailed implementation manners

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0028] Referring to Figure 2 、 Figure 3 and Figure 4 , a connection structure between a valve cap and a valve stem includes a sealing cap 1 and a nozzle rod 2, wherein the sealing cap 1 is located above the nozzle rod 2, and the sealing cap 1 and the nozzle rod 2 are detachably installed, eliminating the cumbersome processing of threads in the nozzle rod and the sealing cap and reducing the processing cost.

[0029] Referring to Figure 2 , the bottom of the sealing cap 1 is open, and a guide groove 12 for connecting with the nozzle rod 2 is provided inside. The guide groove 12 is designed as a whole in a conical shape. A rubber gasket 11 is installed at the top of the guide groove 12. When the nozzle rod 2 is finally completely connected to the sealing cap 1, the nozzle rod 2 can abut against the rubber gasket 11, and the rubber gasket 11 of the sealing cap 1 is deformed by the extrusion of the end of the nozzle rod 2, and the sealing cap 1 starts to seal.

[0030] Further, a plurality of snap rings 13 are installed on the side wall of the guiding groove 12 inside the sealing cap 1. The plurality of snap rings 13 are located on the same horizontal plane and are used for snap connection with the nozzle rod 2. It should be noted that the snap ring 13 is integrally designed as an arc-shaped convex structure, and the convexity faces the center position of the sealing cap 1. When the nozzle rod 2 is inserted into the sealing cap 1, the convexity of the snap ring 13 will not affect the insertion of the nozzle rod 2.

[0031] Furthermore, an overflow groove 14 is provided between the inner side of the snap ring 13 and the inner wall of the sealing cap 1.

[0032] Refer to Figure 2 , on the outer side of the top where the nozzle rod 2 is connected to the sealing cap 1, a first slot 22 and a second slot 23 are provided. The second slot 23 is located below the first slot 22. Both the first slot 22 and the second slot 23 can be snap-connected with the snap ring 13. An air overflow groove 21 is provided above the first slot 22. When the sealing cap 1 is connected to the nozzle rod 2, the air overflow groove 21 first contacts the sealing cap 1, and then the first slot 22 and the second slot 23 follow in sequence.

[0033] Further, a protruding identification block 24 is installed on the outer wall of the end where the nozzle rod 2 is connected to the sealing cap 1, and the identification block 24 is located below the second slot 23.

[0034] It should be noted that the end of the nozzle rod 2 connected to the sealing cap 1 is set in a conical shape, which exactly matches the guiding groove 12 inside the sealing cap 1. The conical design facilitates installation and disassembly and can self-align for guiding.

[0035] The specific operation principle of this application is as follows:

[0036] During installation, the sealing cap 1 is naturally placed on the nozzle rod 2, and the sealing cap 1 and the nozzle rod 2 self-align. Press the position of the snap ring 13 of the sealing cap 1 forcefully, and axially displace the snap ring 13 inside the sealing cap 1 to the position of the first slot 22. At this time, the sealing cap 1 just contacts the rubber gasket 11 and does not play a sealing role. At this time, the sealing cap 1 plays a dust-proof role; continue to move the sealing cap 1 and displace the snap ring 13 to the position of the second slot 23. At this time, the edge of the sealing cap 1 reaches the position of the identification block 24 of the nozzle rod 2, and the rubber gasket 11 of the sealing cap 1 is deformed by the extrusion of the end of the nozzle rod 2. At this time, the sealing cap 1 starts to seal.

[0037] When the sealing cap 1 is assembled with the nozzle rod 2, when the sealing cap 1 is subjected to an axial force, the nozzle rod 2 and the side wall of the sealing cap 1 are self-guided, so that the sealing cap 1 and the nozzle rod 2 are automatically aligned and will not tilt or be misaligned; when the snap ring 13 on the inner wall of the sealing cap 1 is squeezed, the overflow groove 14 can bear the extruded extra space. When the sealing cap 1 is displaced into the first slot 22 and the second slot 23 of the nozzle rod 2, the overflow groove 14 resumes. At this time, the snap ring 13 is riveted to the nozzle rod 2, and the air overflow groove 21 on the valve nozzle rod bears the air during assembly. There is no siphon effect between the nozzle rod 2 and the sealing cap 1. At this time, the sealing gasket 11 of the sealing cap 1 is squeezed with the mouth surface of the nozzle rod 2 to form a seal, and there is a positioning block 24 for positioning.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A connection structure between a valve cap and a valve stem, comprising a sealing cap (1) and a valve stem (2), characterized in that: The sealing cap (1) is located at the end of the nozzle rod (2) and is snap-connected with the nozzle rod (2); A guide groove (12) is provided inside the sealing cap (1), and a retaining spring (13) is provided inside the guide groove (12) and at a lower position; A first clamping groove (22) and a second clamping groove (23) are provided on the outer side of the top where the nozzle rod (2) is connected to the sealing cap (1), wherein the second clamping groove (23) is located below the first clamping groove (22), and both the first clamping groove (22) and the second clamping groove (23) can be clamped and connected with the retaining spring (13).

2. The connection structure of a valve cap and a valve stem according to claim 1, characterized in that: A rubber pad (11) is installed at an upper position on the inner side of the sealing cap (1).

3. The connection structure of a valve cap and a valve stem according to claim 1, characterized in that: An overflow groove (14) is reserved on the inner side of the clamping spring (13) and between the inner wall of the sealing cap (1).

4. The connection structure of a valve cap and a valve stem according to claim 3, characterized in that: The clamping spring (13) is in the form of an arc-shaped protrusion as a whole, and the protrusion faces the center position of the sealing cap (1).

5. The connection structure of a valve cap and a valve stem according to claim 1, characterized in that: An overflow groove (21) is provided at the top of the nozzle rod (2) where it is connected to the sealing cap (1), wherein the overflow groove (21) is located above the first clamping groove (22).

6. The connection structure of a valve cap and a valve stem according to claim 1, characterized in that: An identification block (24) is provided on the outer side of the end portion of the nozzle rod (2) connected to the sealing cap (1), wherein the identification block (24) is located below the second clamping slot (23), and the identification block (24) can abut against the bottom wall of the sealing cap (1).

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