Spring valve core and its matched inflation head structure

Abstract

A spring type valve core and its matched inflation head structure belong to the technical field of tire inflation. The spring type valve core comprises a valve core body and a valve nozzle. The valve core body comprises a core body, a core rod arranged in the core body and capable of being sealingly connected with the core body at the lower end, and a spring sleeved on the core rod and capable of pushing the core rod to slide upward to complete the sealing. The valve core body is fixedly installed at the upper end of the valve nozzle and protrudes from the valve nozzle. The upper end of the core rod is not higher than the upper surface of the core body in the sealing state. The core body is provided with an inflation fixing clamping groove on the outer circumferential wall body close to the upper end. The core body is embedded with an inner sealing ring on the inner circumferential wall body close to the upper end. The advantages are that the installation of the valve core is convenient, the core rod is prevented from being mistakenly touched, the inflation does not need to be completed in cooperation with the valve nozzle, the installation difficulty of the valve core is reduced, the stability of the valve core is improved, the inflation head can be quickly inserted and matched with the valve core, the inflation difficulty is greatly reduced, and the operation steps of inflation are simplified.

Description

Technical Field

[0001] This utility model belongs to the field of tire inflation technology, specifically relating to a spring-type valve core, and also to an inflation head structure that is matched with it. Background Technology

[0002] Tires are one of the most important components of vehicles such as cars, bicycles, motorcycles, and electric bicycles. Tires typically need to be inflated before use. A tire generally has a valve stem connected to the inner tube and a valve core mounted on the valve stem. Inflation is the process of overcoming the resistance of the valve core to inflate the inner tube. The valve core is one of the most important components of a tire. Currently, valve cores are mainly divided into American-style valve cores, French-style valve cores, and German-style valve cores, among others. In China, American-style valve cores are commonly used in bicycle tires. The valve stem of an American-style valve core protrudes from the body and is typically screwed into the valve stem via a thread. This causes the valve stem to sink into the valve stem, preventing accidental activation. Inflation is achieved by the inflation head gripping the valve stem and a pin pushing open the valve stem. This type of valve core requires specialized tools for disassembly and installation, making replacement cumbersome and inefficient. French-style valve cores, on the other hand, generally use a nut to tighten the valve stem and control the valve's on / off state. While this is more convenient to install and use, the nut still needs to be manually rotated each time the tire is inflated. Loosening the nut allows air to escape quickly from the tire, but the passage cannot be sealed quickly after inflation. Furthermore, the nut may loosen due to tire movement, failing to meet consumer needs. German-style valve cores have the simplest structure, using a sealing block to create a one-way passage. After inflation, the tire pressure presses against the sealing block, preventing leakage. However, with prolonged use and changes in ambient temperature, tire pressure decreases. Lower pressure reduces the sealing effect, leading to faster leakage. Therefore, German-style valve cores require periodic inflation to maintain proper tire pressure. Additionally, the types of inflation heads for these valve cores vary; some require tightening, some require manual pressing, and others require operating a locking switch, making inflation operations generally cumbersome.

[0003] In existing technologies, such as the "valve core" provided by Chinese invention patent application publication number CN1776274A, there are: a core body, a piston, a sealing ring, and a core cap. The core body has a stepped through hole axially formed at its center. The small diameter section on the left side of the stepped through hole is an air inlet, and the large diameter section on the right side is a piston chamber. The piston is inserted into the piston chamber. An air outlet is formed on the left shell wall of the core body corresponding to the piston chamber. The distance from the air outlet to the rear end of the piston chamber is greater than the axial length of the piston. The sealing ring is placed on the outer wall of the core body, and the core cap is connected to the front end of the core body. This valve core is a typical German valve core structure, which has many of the disadvantages of the aforementioned German valve core.

[0004] For example, the "novel valve core" disclosed in Chinese Utility Model Patent Publication No. CN201318484Y includes a core body, a core rod, a core seat, a core cap, a spring, a sealing ring, and a sealing gasket. The core cap is snapped onto the upper end of the core body, the core rod is located inside the core body, and the upper end of the core rod protrudes outside the core body. A spring is fitted on the core rod, the upper end of the spring rests on the core cap, and the lower end of the spring rests on the annular platform inside the core body. The core seat is fixed to the lower end of the core rod, and a sealing gasket is provided on the core seat. A sealing ring is provided outside the core body. The feature is that the lower end of the core body is an inner conical surface, and the corner of the sealing gasket is in contact with the inner conical surface. Because the sealing gasket contacts the inner conical surface at the bottom of the core with the tip or small bevel of its own corner, the greater the air pressure, the tighter the contact between the two, thus ensuring a high-performance sealing effect. This type of valve core is the American valve core mentioned above. Since its core rod protrudes from the core body, it needs to be installed in the valve stem to work together. Installing the valve core into the valve stem requires special tools, which presents a problem of installation difficulty.

[0005] In view of the aforementioned problems, it is necessary to design a spring-type valve core that is simple in structure, low in cost, easy to install and disassemble without needing to be matched with a valve stem, and has a good self-sealing effect; and to provide an inflation head structure that can be quickly connected for inflation and used with the spring-type valve core. To this end, the applicant has conducted active and beneficial research, resulting in the technical solution described below. Utility Model Content

[0006] The primary objective of this invention is to provide a spring-loaded valve core that helps improve the installation structure of the valve core and valve stem, placing the valve core at the end of the valve nozzle for easier installation. It also helps to place the valve stem inside the valve core to prevent accidental contact and eliminates the need for the valve stem to cooperate with the valve nozzle for inflation. Furthermore, it reduces the difficulty of valve core installation and improves valve core stability.

[0007] Another objective of this invention is to provide an inflation head structure that is compatible with a spring-loaded valve core. This structure helps to improve the inflation head structure so that it can quickly achieve insertion and engagement with the valve core, thereby reducing inflation difficulty and simplifying the inflation operation steps.

[0008] To accomplish the primary task, the technical solution provided by this utility model is: a spring-type valve core, comprising a valve core body and a valve nozzle. The valve core body includes a core, a core rod that slides vertically through the core and whose lower end can form a sealed connection with the core, and a spring set on the core rod that can push the core rod upward to complete the seal. The valve core body is fixedly installed on the upper end of the valve nozzle and protrudes from the valve nozzle. The upper end of the core rod is not higher than the upper surface of the core in the sealed state. The core has an inflation fixing groove on its outer circumferential wall near the upper end, and an inner sealing ring is embedded on its inner circumferential wall near the upper end.

[0009] In a specific embodiment of this utility model, the valve core body has a groove for installing a sealing ring on the outer circumferential wall near the lower end, and an installation sealing ring is fitted inside the groove; the valve nozzle has a sealing edge on the inner side wall near the upper end for sealing by mutual compression with the installation sealing ring.

[0010] In another specific embodiment of this utility model, the valve core body has a through-hole in the middle, the core rod passes through the through-hole, and a spring seat is formed by protruding outward at the upper middle part of the core rod. A sealing seat extending out of the valve core body is formed at the lower end of the core rod, and a core rod sealing ring is fitted on the sealing seat. The air hole of the valve core body has a core rod sealing ring mating bevel formed at the bottom edge for mating with the core rod sealing ring, and a step is formed on the hole wall near the lower end of the air hole. The upper end of the spring abuts against the spring seat, and the lower end abuts against the step. The spring pushes the spring seat and the core rod to slide upward, and the core rod sealing ring and the core rod sealing ring mating bevel form a sealed connection.

[0011] In another specific embodiment of this utility model, the diameter of the core rod is smaller than the diameter of the air hole, and an air channel is formed between the spring seat and the wall of the air hole.

[0012] In another specific embodiment of this utility model, the air hole has an inner sealing ring groove on the inner circumference of the hole wall near the upper end, and the inner sealing ring is embedded in the sealing ring groove.

[0013] In another specific embodiment of this utility model, the core body has a mounting flange formed on the outer circumference near the middle; the outer surface of the valve stem is provided with an external valve stem thread; a locking nut is fitted on the valve core body, the upper end of the locking nut has a pressing edge forming inward that presses against the mounting flange, and the inner side of the locking nut has a locking nut internal thread for screwing with the external valve stem thread. The valve core body is locked onto the valve stem by the locking nut, and the mounting flange is pressed and fixed by the pressing edge, thereby completing the fixed installation of the valve core body and the valve stem.

[0014] In a further specific embodiment of this utility model, the valve stem has an internal thread on its inner circumferential wall near the upper end; the core has a core fixing thread on its outer circumference near the middle, and the valve core body is directly screwed into the internal thread of the valve stem through the core fixing thread, thereby completing the fixed installation of the valve core body and the valve stem.

[0015] To accomplish another task, the technical solution provided by this utility model is: an inflation head structure for use with a spring-type valve core, comprising an inflation head body, characterized in that: an inflation chamber is formed in the middle of the lower end of the inflation head body, an inflation tube is provided at the upper end of the inflation head body, the inflation tube and the inflation chamber are interconnected through an air tube mounting hole, an air tube is embedded in the air tube mounting hole, the upper end of the air tube is fixed to the air tube mounting hole, and the lower end extends into the inflation chamber; a washer groove is provided around the outer wall of the inflation head body, a set of locking steel ball mounting holes for communicating with the inflation chamber are spaced apart around the circumference in the washer groove, a locking steel ball is respectively provided in the locking steel ball mounting hole, a part of the locking steel ball passes through the locking steel ball mounting hole and protrudes into the inflation chamber, a washer is sleeved in the washer groove, the washer presses against the locking steel ball and keeps the locking steel ball in the state of protruding into the inflation chamber.

[0016] In a further specific embodiment of this utility model, the diameter of the locking steel ball mounting hole on the side near the inflation chamber is smaller than the diameter of the locking steel ball, which is used to restrict the locking steel ball from falling into the inflation chamber.

[0017] In yet another specific embodiment of this utility model, a set of air outlets are provided on the lower end sidewall of the trachea.

[0018] The technical solution provided by this utility model, by adopting the above-mentioned valve core structure, hides the upper end of the core rod inside the core body, while the valve core body protrudes entirely from the valve stem for installation and fixation. This connection method greatly facilitates the installation of the valve core and avoids accidental contact with the core rod. Furthermore, it eliminates the need for cooperation with the valve stem to complete inflation, effectively reducing the installation difficulty of the valve core and improving its stability. In addition, by adopting the above-mentioned inflation head structure, the inflation head effectively enables quick insertion and mating of the inflation head and valve core by using the inflation tube to open the core rod and locking the locking steel ball to the valve core body. This greatly reduces the inflation difficulty and simplifies the inflation operation steps. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model; Figure 2 This is a three-dimensional structural diagram of another embodiment of the present utility model; Figure 3 This is a schematic diagram of the structure of the inflation head body described in this utility model; Figure 4 This is a schematic diagram of the assembly state according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the inflation state according to an embodiment of the present invention.

[0020] In the diagram: 1. Valve core body; 11. Core body; 111. Air hole; 1111. Sealing ring groove; 1112. Inner sealing ring; 1113. Step; 1114. Core rod sealing ring mating bevel; 112. Mounting flange; 113. Inflation fixing groove; 114. Sealing ring mounting groove; 1141. Sealing ring mounting; 115. Core body fixing thread; 12. Core rod; 121. Spring seat; 1211. Air passage; 122. Sealing seat; 123. 13. Spring; 2. Valve head; 21. Valve head sealing edge; 22. Valve head external thread; 23. Valve head internal thread; 24. Locking nut; 241. Pressing edge; 242. Locking nut internal thread; 3. Inflation head body; 31. Inflation chamber; 311. Locking steel ball mounting hole; 312. Locking steel ball; 32. Inflation tube; 33. Air tube mounting hole; 34. Air tube; 341. Air tube outlet; 35. Washer groove; 351. Washer. Detailed Implementation

[0021] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. However, the description of the embodiments is not a limitation on the technical solution. Any formal but not substantive changes made based on the concept of this utility model should be considered within the protection scope of this utility model.

[0022] In the following description, all directional or positional concepts involving up, down, left, right, front, and back are based on... Figure 1 The positions shown are for reference only and should not be construed as a particular limitation on the technical solutions provided by this utility model.

[0023] Example 1, please refer to Figure 1 , Figure 4 The diagram illustrates a spring-type valve core, comprising a valve core body 1 and a valve stem 2. The valve core body 1 includes a core 11, a core rod 12 that slides vertically through the core 11 and whose lower end can form a sealed connection with the core 11, and a spring 13 that is mounted on the core rod 12 and can push the core rod 12 upward to complete the seal. The valve core body 1 is fixedly mounted on the upper end of the valve stem 2 and protrudes from the valve stem 2. The upper end of the core rod 12 is not higher than the upper surface of the core 11 in the sealed state. The core 11 has an inflation fixing groove 113 on its outer circumferential wall near the upper end, and an inner sealing ring 1112 is embedded in the inner circumferential wall of the core 11 near the upper end.

[0024] The aforementioned valve core body 1 has a groove 114 for mounting a sealing ring on its outer circumferential wall near the lower end, and a mounting sealing ring 1141 is fitted inside the groove 114; the aforementioned valve nozzle 2 has a valve nozzle sealing edge 21 on its inner side wall near the upper end for sealing by mutual compression with the mounting sealing ring 1141.

[0025] The aforementioned valve core body 1 has a through-hole 111 in the middle, and the aforementioned core rod 12 passes through the through-hole 111. A spring seat 121 is formed by protruding outward at a position slightly above the middle of the aforementioned core rod 12. A sealing seat 122 extending out of the valve core body 1 is formed at the lower end of the aforementioned core rod 12, and a core rod sealing ring 123 is fitted on the aforementioned sealing seat 122. The through-hole 111 of the aforementioned valve core body 1 is formed at the bottom edge. There is a beveled edge 1114 for engaging with the core rod sealing ring 123. A step 1113 is formed on the wall of the aforementioned air hole 111 near the lower end. The upper end of the aforementioned spring 13 abuts against the spring seat 121, and the lower end abuts against the step 1113. The spring 13 pushes the aforementioned spring seat 121 and core rod 12 to slide upward, and a sealed connection is formed between the core rod sealing ring 123 and the beveled edge 1114.

[0026] The diameter of the aforementioned core rod 12 is smaller than the diameter of the air hole 111, and an air channel 1211 is formed between the aforementioned spring seat 121 and the hole wall of the air hole 111. The aforementioned air hole 111 has an inner sealing ring groove 1111 on the inner circumference of the hole wall near the upper end, and the aforementioned inner sealing ring 1112 is embedded in the sealing ring groove 1111.

[0027] Please continue reading. Figure 4 and combined Figure 1 The aforementioned core 11 has a mounting flange 112 formed on its outer circumference near the center; the outer surface of the aforementioned valve stem 2 is provided with an external valve stem thread 22; a locking nut 24 is fitted on the aforementioned valve core body 1, and a pressing edge 241 is formed on the upper top of the aforementioned locking nut 24, which presses against the mounting flange 112. The inner side of the aforementioned locking nut 24 is formed with a locking nut internal thread 242 for screwing with the external valve stem thread 22. The aforementioned valve core body 1 is locked onto the valve stem 2 by the locking nut 24, and the mounting flange 112 is pressed and fixed by the pressing edge 241, thereby completing the fixed installation of the valve core body 1 and the valve stem 2. At this time, the aforementioned mounting sealing ring 1141 presses the valve stem sealing edge 21, thereby achieving a seal between the valve core body 1 and the valve stem 2.

[0028] Please see Figure 3 This diagram illustrates an inflation head structure compatible with a spring-loaded valve core, comprising an inflation head body 3, an inflation chamber 31 formed at the lower center of the inflation head body 3, an inflation tube 32 provided at the upper end of the inflation head body 3, the inflation tube 32 and the inflation chamber 31 being interconnected via an air tube mounting hole 33, an air tube 34 embedded within the air tube mounting hole 33, the upper end of the air tube 34 being fixed to the air tube mounting hole 33, and the lower end extending into the inflation chamber 31; a circumference of the outer wall of the inflation head body 3 is provided with... The gasket groove 35 has a set of locking steel ball mounting holes 311 spaced around its circumference for communication with the inflation chamber 31. A locking steel ball 312 is installed in each of the locking steel ball mounting holes 311, with a portion of the locking steel ball 312 passing through the hole and protruding into the inflation chamber 31. A gasket 351 is fitted inside the gasket groove 35, pressing against the locking steel ball 312 and keeping it inserted into the inflation chamber 31. The inner diameter of the air tube 34 is slightly larger than the outer diameter of the core rod 12. The inner sealing ring 1112 is sealed to the outer wall of the air tube 34. The inner diameter of the inflation chamber 31 matches the outer diameter of the core 11. During inflation, the locking steel ball 312 engages in the inflation fixing slot 113, thereby connecting the inflation head body 3 and the valve core body 1.

[0029] The diameter of the aforementioned locking steel ball mounting hole 311 on the side near the inflation chamber 31 is smaller than the diameter of the aforementioned locking steel ball 312, which is used to restrict the aforementioned locking steel ball 312 from falling into the inflation chamber 31.

[0030] A set of air outlets 341 are provided on the lower side wall of the aforementioned trachea 34.

[0031] Please see Figure 1 , Figure 3 , Figure 4 and Figure 5 When inflation is required, the aforementioned inflation head body 3 is connected to an air source via the inflation tube 32, and the inflation chamber 31 of the aforementioned inflation head body 3 is filled as follows: Figure 5 The valve core body 1 is inserted downwards in the shown state. During the insertion process, the air tube 34 is fitted onto the core rod 12 and pushes the sealing seat 122, causing the core rod 12 to slide downwards and compress the spring 13. The core rod sealing ring 123 separates from the inclined edge 1114 of the core rod sealing ring, thus releasing the seal. This continues until the locking steel ball 312 falls into the inflation fixing groove 113 and locks in place, confirming that it is inserted correctly. At this time, the gasket 351 presses the locking steel ball 312 and fixes it in the inflation fixing groove 113, thereby preventing the inflation head body 3 from being... During inflation, the valve stem detaches; then, gas enters from the aforementioned inflation tube 32, and sequentially passes through the air tube 34, the air tube outlet 341, the air passage 1211, and the gap between the valve stem sealing ring 123 and the valve stem sealing ring's beveled edge 1114 before entering the tire through the valve nozzle 2. After inflation is complete, the aforementioned inflation head body 3 is pulled out, and the aforementioned valve stem 12 slides upward under the force of the spring 13, pressing the valve stem sealing ring 123 and the valve stem sealing ring's beveled edge 1114 together to seal, thereby preventing gas leakage from the tire. In actual use, after inflation is complete, a rubber cap is usually installed at the end of the valve stem body 1 to prevent dust from falling into the valve stem body 1.

[0032] Example 2, please refer to Figure 2 The structure of this embodiment is basically the same as that of Embodiment 1, except that the valve core body 1 does not require locking nut 24 for fixed installation, and the core 11 does not have mounting flange 112. Specifically, the valve nozzle 2 has an internal thread 23 on its inner circumferential wall near the upper end; the core 11 has a core fixing thread 115 on its outer circumference near the middle. The valve core body 1 is directly screwed into the internal thread 23 of the valve nozzle through the core fixing thread 115, thereby completing the fixed installation of the valve core body 1 and the valve nozzle 2. At this time, the mounting sealing ring 1141 presses against the valve nozzle sealing edge 21, thereby achieving a seal between the valve core body 1 and the valve nozzle 2.

[0033] In summary, the technical solution provided by this utility model makes up for the shortcomings of the prior art, successfully completes the utility model task, and faithfully realizes the technical effects described by the applicant in the above technical effect column.

Claims

1. A spring-loaded valve core, comprising a valve core body (1) and a valve stem (2), characterized in that: The valve core body (1) includes a core (11), a core rod (12) that slides vertically through the core (11) and whose lower end can be sealed to the core (11), and a spring (13) that is mounted on the core rod (12) and can push the core rod (12) to slide upward to complete the seal. The valve core body (1) is fixedly installed on the upper end of the valve nozzle (2) and protrudes from the valve nozzle (2). The upper end of the core rod (12) is not higher than the upper surface of the core (11) in the sealed state. The core (11) has an inflation fixing groove (113) on the outer circumferential wall near the upper end. The core (11) has an inner sealing ring (1112) embedded on the inner circumferential wall near the upper end.

2. A spring-type valve core according to claim 1, characterized in that: The valve core body (1) has a groove (114) for installing a sealing ring on its outer circumferential wall near the lower end, and a sealing ring (1141) is fitted inside the groove (114); the valve nozzle (2) has a valve nozzle sealing edge (21) on its inner side wall near the upper end for sealing by mutual compression with the sealing ring (1141).

3. A spring-loaded valve core according to claim 1, characterized in that: The valve core body (1) has a through-hole (111) in the middle, and the core rod (12) passes through the through-hole (111). A spring seat (121) is formed by protruding outward at the upper middle part of the core rod (12). A sealing seat (122) extending out of the valve core body (1) is formed at the lower end of the core rod (12), and a core rod sealing ring (123) is fitted on the sealing seat (122). The through-hole (111) of the valve core body (1) is shaped at the bottom edge. A core rod sealing ring has a beveled edge (1114) for engaging with the core rod sealing ring (123), and a step (1113) is formed on the hole wall near the lower end of the air hole (111). The upper end of the spring (13) abuts against the spring seat (121), and the lower end abuts against the step (1113). The spring (13) pushes the spring seat (121) and the core rod (12) to slide upward, and a sealed connection is formed between the core rod sealing ring (123) and the beveled edge (1114).

4. A spring-type valve core according to claim 1, characterized in that: The diameter of the core rod (12) is smaller than the diameter of the air hole (111), and an air channel (1211) is formed between the spring seat (121) and the hole wall of the air hole (111).

5. A spring-type valve core according to claim 1, characterized in that: The vent (111) has an inner sealing ring groove (1111) on the inner circumference of the hole wall near the upper end, and the inner sealing ring (1112) is embedded in the sealing ring groove (1111).

6. A spring-type valve core according to claim 1, characterized in that: The core (11) has a mounting flange (112) formed on its outer circumference near the center; the valve stem (2) has an external valve thread (22) on its outer surface; a locking nut (24) is fitted on the valve core body (1), and a pressing edge (241) is formed on the upper top of the locking nut (24) that presses against the mounting flange (112). The inner side of the locking nut (24) has an internal locking nut thread (242) for screwing with the external valve thread (22). The valve core body (1) is locked onto the valve stem (2) by the locking nut (24) and the mounting flange (112) is pressed and fixed by the pressing edge (241), thereby completing the fixed installation of the valve core body (1) and the valve stem (2).

7. A spring-loaded valve core according to claim 1, characterized in that: The valve stem (2) has an internal thread (23) on its inner circumferential wall near the upper end; the core (11) has a core fixing thread (115) on its outer circumference near the middle. The valve core body (1) is directly screwed into the internal thread (23) of the valve stem through the core fixing thread (115), thereby completing the fixed installation of the valve core body (1) and the valve stem (2).

8. An inflation head structure for use with a spring-type valve core as described in any one of claims 1 to 7, comprising an inflation head body (3), characterized in that: An inflation chamber (31) is formed in the middle of the lower end of the inflation head body (3). An inflation tube (32) is provided at the upper end of the inflation head body (3). The inflation tube (32) and the inflation chamber (31) are connected to each other through an air tube mounting hole (33). An air tube (34) is embedded in the air tube mounting hole (33). The upper end of the air tube (34) is fixed to the air tube mounting hole (33), and the lower end extends into the inflation chamber (31). A washer groove (35) is provided around the outer wall of the inflation head body (3). 5) A set of locking steel ball mounting holes (311) for communicating with the inflation chamber (31) are provided at intervals around the circumference. A locking steel ball (312) is provided in each of the locking steel ball mounting holes (311). A part of the locking steel ball (312) passes through the locking steel ball mounting hole (311) and enters the inflation chamber (31). A washer (351) is fitted in the washer groove (35). The washer (351) presses against the locking steel ball (312) and keeps the locking steel ball (312) in the state of entering the inflation chamber (31).

9. The inflation head structure according to claim 8, characterized in that: The diameter of the locking steel ball mounting hole (311) on the side near the inflation chamber (31) is smaller than the diameter of the locking steel ball (312), which is used to restrict the locking steel ball (312) from falling into the inflation chamber (31).

10. The inflation head structure according to claim 8, characterized in that: A set of air outlets (341) are provided on the lower end side wall of the trachea (34).

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