Tire pressure maintaining inflator

Abstract

The utility model provides a kind of tire pressure maintaining inflation rod, it is related to the technical field of auxiliary device for tire inflation, including inflation pipe, the lateral wall of inflation pipe is equipped with the air inlet pipe communicated with it, rocker is equipped in inflation pipe, and the upper end of inflation pipe is equipped with the sealing ring that is attached with rocker, one end of rocker is equipped with clamping slot, the axial direction of clamping slot is equipped with blind hole along rocker, and the outside of inflation pipe is equipped with rocker handle that another end projects, it is characterized in that, one end of the clamping slot of rocker is fixed and equipped with one end of clamping spring, another end of clamping spring is equipped with protrusion, and the protrusion is located in clamping slot;The utility model uses protrusion to limit valve core in clamping slot, ensure that valve core is firmly and reliably clamped in the clamping slot of rocker during loading and unloading process, cannot drop halfway, ensure that inflation pipe internal pressure is invariable by sealing ring, under the condition of not pressure relief, it is easily screwed into tire valve mouth, to complete inflation sealing one-time success, greatly improve efficiency and save energy.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary devices for tire inflation, and in particular to a tire pressure maintaining and inflating rod. Background Technology

[0002] Currently, tubeless tires (vacuum tires) are widely used in automobiles and various electric vehicles. When initially inflating a tubeless tire or inflating it after a tire repair, the valve core must first be removed to allow for a rapid influx of air to form an initial seal between the tire and the rim. In existing technology, a rocker-type inflator is commonly used to accomplish this operation: the inflator is used to unscrew the valve core and pull it out, and then a high-pressure air source is connected through the same interface for inflation; after the tire is in contact with the rim, the air source interface must be disconnected, and then the rocker, along with the valve core, is inserted through the interface to attempt to screw the valve core back onto the valve stem for further normal inflation to the specified pressure.

[0003] However, this method has a significant drawback: the connection between the latch at the end of the lever and the valve core is usually a simple floating connection. This connection is extremely unreliable; during the installation of the valve core into the valve stem, it is very easy for it to accidentally detach from the latch. Since the inflation port has been removed, the compressed air already inflated in the tire will leak rapidly and uncontrollably, especially in small tubeless tires, where deflation during valve core reinstallation often leads to the failure of the newly formed tire-rim seal. The operator can only repeat the above process—connecting the air source and rapidly inflating again—to try to re-establish the seal. This process often needs to be repeated multiple times until the valve core is successfully installed. Although it eventually succeeds, it severely wastes operating time and the electrical or other energy resources needed to drive the air compressor. Therefore, how to achieve reliable carrying and rapid, pressure-maintaining installation of the valve core during the installation process has become a practical problem plaguing the industry.

[0004] While existing technologies have attempted improvements to address the aforementioned issues, they have not fundamentally solved them. For example, Chinese patent CN201050461Y discloses a "sealed, fast, safe, and convenient tire inflator." Within a sealed outer shell, a valve core wrench is installed, along with a front connecting screw. The connecting screw is tightened, and a retaining ring in the middle of the rear connecting screw is tightened with a rotatable push-pull rod. A sealing ring filled with lubricating foam is inserted, and the rear ends of the front and rear sealing ring fixing sleeves are fitted with sealing rings. All the components sealed internally are then installed within the outer sealing element. The main tube is connected to the valve connector at its front end, and a plug is installed at its rear end. The handle is then fixed to the handle with a fixing screw. A spring and spring fixing screw are installed on one side of the handle, and a crank handle is installed, forming a complete sealed, fast, safe, and convenient tire inflator. In use, the inflator employs a rotatable push-pull rod and crank handle structure. The valve core is displaced counter-clockwise, inflated, and then displaced clockwise. However, the "insertion" connection between the rocker arm and the valve core retainer is essentially a floating plug-in relationship relying on friction. When there is air pressure inside the tire, the friction between the valve core retainer and the rocker arm connector is insufficient to resist the disturbances and resistance caused by air pressure during insertion and rotation, still posing a risk of connection failure and valve core detachment. This fails to effectively solve the technical problems of valve core detachment and inaccurate installation within the valve stem. Utility Model Content

[0005] The technical problem to be solved by this utility model is that existing tire inflation equipment cannot form an effective fixation with the valve core, causing the valve core to fall off and making it impossible to install accurately. In order to solve the above problem, a tire pressure maintaining inflation rod is provided.

[0006] This utility model is achieved in the following manner: A tire pressure maintaining inflator includes an inflation tube with an air inlet pipe communicating with its side wall. A rocker arm is provided inside the inflation tube, and a sealing ring that fits against the rocker arm is provided at the upper end of the inflation tube. One end of the rocker arm has a groove with a blind hole along the axial direction of the rocker arm in the groove. The other end extends out of the inflation tube and has a rocker arm handle. One end of a retaining spring is fixed to one end of the groove of the rocker arm, and the other end of the retaining spring has a protrusion located inside the groove.

[0007] Preferably, the protrusion faces the axis of the rocker arm, and the protrusion extends into the slot at the bottom of the slot.

[0008] Preferably, the slot includes a slot wall and a notch, and the protrusion extends into the slot from the notch.

[0009] Preferably, the slot includes a slot wall and a notch, the slot wall has a hole, the hole is correspondingly arranged with a protrusion, and the protrusion extends into the slot from the hole on the slot wall.

[0010] Preferably, two retaining rings are provided symmetrically along the rocker arm axis.

[0011] Preferably, the retaining ring is a stainless steel spring sheet.

[0012] Preferably, a rocker positioning sleeve is fixedly provided at one end of the rocker arm near the slot.

[0013] Preferably, the retaining ring and the rocker arm positioning sleeve are fixed together or separately to the outer wall of the rocker arm by screws.

[0014] Preferably, a retaining ring is fixed inside the inflation tube near the upper end.

[0015] Preferably, the air inlet pipe is provided with a valve and a valve handle, the inflation pipe is provided with a pressure gauge on its side wall, and the lower end of the inflation pipe is provided with an internal thread.

[0016] Compared to existing technologies, this invention uses a protrusion to confine the valve core within the slot, ensuring that the valve core is securely and reliably held in the slot of the rocker arm during installation and removal, preventing it from falling off midway. The sealing ring ensures that the pressure inside the inflation tube remains constant, allowing it to be easily screwed into the tire valve without depressurization, thus completing the inflation and sealing process in one go, greatly improving efficiency and saving energy. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the card slot structure in this utility model.

[0019] Figure 3 This is a cross-sectional schematic diagram of the present invention in use.

[0020] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.

[0021] Figure 5 This is a schematic diagram of the structure of this utility model with the valve core pulled out.

[0022] Figure 6 Is along with Figure 3 A schematic diagram of a cross-section obtained by cutting in a direction perpendicular to the cutting plane.

[0023] Figure 7 yes Figure 6 A magnified view of a section at point B in the middle.

[0024] Figure 8 yes Figure 7 Cross-sectional view at point cc.

[0025] Figure 9This is a cross-sectional schematic diagram of two retaining springs installed on the outer wall of the notched rocker arm of this utility model.

[0026] Figure 10 yes Figure 9 Cross-sectional view at point dd.

[0027] Figure 11 This is a cross-sectional schematic diagram of a retaining spring installed on the outer wall of the rocker arm on the side of the groove in this utility model.

[0028] Figure 12 yes Figure 11 A magnified view of a section at point E in the middle.

[0029] Figure 13 yes Figure 12 Cross-sectional view at point ee.

[0030] Figure 14 This is a schematic diagram of the structure of the groove wall with holes in this utility model.

[0031] Figure 15 This is a cross-sectional schematic diagram of two retaining springs installed on the outer wall of the rocker arm on the side of the groove in this utility model.

[0032] Wherein, 1 is the inflation tube; 2 is the air inlet tube; 3 is the rocker arm; 4 is the slot; 41 is the slot wall; 42 is the notch; 43 is the hole; 44 is the blind hole; 45 is the slot bottom; 5 is the rocker arm handle; 6 is the retaining ring; 61 is the protrusion; 7 is the rocker arm positioning sleeve; 8 is the retaining ring; 9 is the valve; 10 is the valve handle; 11 is the sealing ring; 12 is the valve nozzle; 13 is the valve core; 14 is the core rod; 15 is the core head; 16 is the core seat; 17 is the pressure gauge; 18 is the pressure gauge pointer; 19 is the internal thread; 20 is the external thread of the valve nozzle. Detailed Implementation

[0033] The present invention will be further described below with reference to specific embodiments, and the advantages and features of the present invention will become clearer with the description. However, unless otherwise specified, the specific experimental methods involved in the following embodiments are conventional methods or implemented according to the conditions recommended in the manufacturer's instructions.

[0034] See Figures 1-15A tire pressure-maintaining inflator includes an inflation tube 1, an air inlet pipe 2 communicating with the side wall of the inflation tube 1, a rocker arm 3 inside the inflation tube 1, and a sealing ring 11 at the upper end of the inflation tube 1 that fits against the rocker arm 3 to ensure no air leakage between the rocker arm and the inflation tube, thus achieving the purpose of maintaining pressure; a groove 4 is provided at one end of the rocker arm 3, and a blind hole 44 is provided in the groove 4 along the axial direction of the rocker arm; the groove 4 includes a groove wall 41 and a notch 42, the groove wall 41 being for... The valve core 14 is snapped into the seat, and the valve core 14 head fits into the blind hole 44; the other end of the rocker arm 3 extends out of the air tube 1 and is provided with a rocker arm handle 5; one end of the groove 4 of the rocker arm 3 is fixed with one end of the retaining spring 6, and the other end of the retaining spring 6 is provided with a protrusion 61, which is located in the groove 4; in the use state, the groove 4 snaps into the valve core 14, and the protrusion 61 restricts the valve core 14 head in the groove and blind hole, so the valve core 14 will not fall off.

[0035] Furthermore, such as Figure 1 , 2 As shown, the protrusion 61 faces the axis of the rocker arm 3, and the protrusion 61 extends into the slot 4 at the bottom 45 of the slot 4, so that the valve core seat can be accommodated in the slot.

[0036] Furthermore, such as Figure 2 As shown, the slot 4 includes a slot wall 41 and a notch 42, as... Figure 4 As shown, the valve core 14 includes a core rod 15, one end of which has a core head 16, and the other end passes through the core seat 21. In use, as... Figures 3-5 As shown, the protrusion 61 is located below the valve core 16 and above the valve seat 21. Since the diameter of the valve core 16 is larger than the diameter of the valve rod 15, the protrusion 61 cooperates with the valve core 16 to prevent the valve core from falling out of the slot, thus achieving the purpose of restricting the valve core. The protrusion 61 is located above the valve seat 21 and will not obstruct the slot wall 41 from engaging the valve seat.

[0037] In one embodiment, such as Figures 1-8 As shown, the retaining ring 6 is disposed on the outer wall of the rocker arm on the notch side, and the protrusion 61 extends into the retaining groove 4 from the notch 42 of the retaining groove, and the protrusion 61 limits the valve core from the notch.

[0038] The processing and installation method of the retaining ring is as follows: First, mill a small flat surface on the outer wall of the notch side of the rocker arm. Drill a hole slightly above the small flat surface and tap it to drill a screw hole. The retaining ring is made of 0.2 mm thick stainless steel spring sheet. Use a small punch to punch a small round protrusion at the lower position of the stainless steel spring sheet to form a bead-like protrusion 61. Drill a mounting hole at the upper position of the stainless steel spring sheet. Use screws to fix it to the small flat surface milled on the outer wall of the rocker arm. Align the lower protrusion 61 with the notch of the retaining groove and insert it. Align the upper mounting hole with the screw hole on the outer wall of the rocker arm. Fix the retaining ring to the rocker arm with screws.

[0039] Furthermore, such as Figure 9 , 10 As shown, two such retaining rings 6 are symmetrically arranged along the rocker arm axis.

[0040] In another embodiment, such as Figures 11-14 As shown, the retaining spring is set on the outer wall of the rocker arm on the side of the groove wall. The retaining groove 4 includes a groove wall 41 and a notch 42. The groove wall 41 is provided with a hole 43. The hole 43 is correspondingly provided with a protrusion 61. The protrusion 61 extends into the retaining groove 4 from the hole 43 on the groove wall 41 to limit and fix the valve core.

[0041] The processing and installation method of the retaining ring is as follows: First, mill a small flat surface on the outer wall of the groove side of the rocker arm. Drill a hole slightly above the small flat surface and tap it to drill a screw hole. Drill a hole on the side wall of the groove to form a hole that allows the protrusion 61 to enter. The retaining ring is made of 0.2 mm thick stainless steel spring sheet. A small round protrusion is punched out at the lower position of the stainless steel spring sheet to form a bead-like protrusion 61. Drill an installation hole at the upper position of the stainless steel spring sheet. During assembly, on the small flat surface of the rocker arm, place the vent valve core retaining ring, align the lower protrusion 61 with the hole on the outer wall of the groove and insert it, and align the upper installation hole with the screw hole on the outer wall of the rocker arm. Fix the retaining ring to the rocker arm with screws.

[0042] Furthermore, such as Figure 15 As shown, two such retaining rings 6 are symmetrically arranged along the rocker arm axis.

[0043] Furthermore, such as Figure 1As shown, a rocker arm positioning sleeve 7 is fixedly provided at one end of the rocker arm 3 near the slot 4 to ensure that the rocker arm accurately enters the valve stem and the slot accurately engages the valve core. In addition, the rocker arm positioning sleeve 7 can also prevent the rocker arm 3 from being completely pulled out of the inflation tube. The rocker arm positioning sleeve can be a rubber sleeve, which is fitted around the outer periphery of the rocker arm; in another embodiment, the rocker arm positioning sleeve is made of 0.3 mm thick galvanized steel plate and punched into a straw hat shape using a small punch press. Screw fixing holes for fixing to the rocker arm are drilled on the side of the positioning sleeve. During installation, a retaining spring is first placed on the small flat surface milled on the rocker arm, with the protrusion aligned with the notch of the slot or the hole on the outer wall of the slot, and inserted. The mounting hole on the retaining spring is aligned with the screw hole on the rocker arm. The straw hat-shaped positioning sleeve is placed with the flat side facing up, and the screw fixing hole on the side is aligned with the screw hole on the rocker arm through the mounting hole on the retaining spring. The rocker arm positioning sleeve and retaining spring are then fixed to the rocker arm with screws.

[0044] Furthermore, the retaining ring 6 and the rocker arm positioning sleeve 7 are fixed together or separately to the outer wall of the rocker arm 3 by screws.

[0045] like Figure 1 , 5 As shown, a retaining ring 8 is fixed inside the inflation tube 1 near the upper end. When the rocker arm is pulled upward, the rocker arm positioning sleeve 7 abuts against the retaining ring 8 to ensure that the rocker arm is not completely pulled out and to ensure that the rocker arm positioning sleeve 7 does not touch the sealing ring and affect the seal.

[0046] like Figure 1 As shown, the air inlet pipe 2 is equipped with a valve 9 and a valve handle 10. The valve is opened and closed by rotating the valve handle, thereby controlling the air intake. After inflation is completed, the valve is closed to ensure that there is no air leakage in the inflation pipe and to achieve the purpose of maintaining pressure.

[0047] like Figure 1 As shown, a pressure gauge 17 is provided on the side wall of the inflation tube, and a pressure gauge pointer 18 is provided inside the pressure gauge 17. When the pointer points to the specified air pressure, inflation is stopped to ensure safety.

[0048] like Figure 5 As shown, the lower end of the inflation tube is provided with an internal thread 19, which mates with the external thread 20 of the valve stem to fix the inflation tube on the valve stem.

[0049] The usage process of this utility model is as follows: Connect and fix the internal thread at the lower end of the inflation tube of the pressure-holding inflation rod to the external thread on the tire valve. Move the rocker arm down, and under the constraint of the rocker arm positioning sleeve, the slot enters the valve. Rotate the rocker arm by the rocker arm handle, and the slot will lock the valve core. Unscrew it, and the protrusion of the retaining spring will lock under the valve core head. Through the cooperation of the protrusion and the core head, the valve core is restricted in the slot, preventing the valve core from falling off. Pull the rocker arm upward until the rocker arm positioning sleeve abuts against the retaining ring. Connect the air source interface to the air intake pipe 2, and turn the valve handle 10 to open the valve 9. Begin inflation and observe the pressure gauge pointer 18 on pressure gauge 17. When the pointer points to the specified air pressure, stop inflation and close valve 9. Because the rocker arm and the inflation tube are sealed by a sealing ring, the entire pressure-holding inflation rod will not leak air and will maintain stable air pressure. When you press the rocker arm handle, the rocker arm moves downward, and the valve core is held in place by the protrusion of the retaining spring in the slot, preventing it from falling out. It can easily enter the valve stem. After tightening the valve core and valve stem, the rocker arm can be easily pulled out of the valve stem because the retaining spring is an elastic sheet. Finally, remove the inflation rod, and inflation is complete. During the process of removing and installing the valve core, the valve core is always held in the slot, forming an effective fixation. The valve core will not fall out and can be accurately installed in the valve stem without requiring multiple installations.

[0050] The above description is only a preferred embodiment of the present utility model. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present utility model, and these should also be considered within the protection scope of the present utility model.

Claims

1. A tire pressure-maintaining inflator rod, comprising an inflation tube (1), wherein the side wall of the inflation tube (1) is provided with an air inlet pipe (2) communicating with it, a rocker arm (3) is provided inside the inflation tube (1), and a sealing ring (11) fitting with the rocker arm (3) is provided at the upper end of the inflation tube (1), one end of the rocker arm (3) is provided with a groove (4), a blind hole (44) is provided in the groove (4) along the axial direction of the rocker arm, and the other end extends out of the inflation tube (1) and is provided with a rocker arm handle (5), characterized in that, One end of the groove (4) of the rocker arm (3) is fixed with one end of the retaining spring (6), and the other end of the retaining spring (6) is provided with a protrusion (61), which is located in the groove (4).

2. The tire pressure maintaining and inflating rod according to claim 1, characterized in that, The protrusion (61) faces the axis of the rocker arm (3) and the protrusion (61) extends into the slot (4) at the bottom (45) of the slot (4).

3. The tire pressure maintaining and inflating rod according to claim 2, characterized in that, The slot (4) includes a slot wall (41) and a notch (42), and the protrusion (61) extends into the slot (4) from the notch (42).

4. The tire pressure maintaining and inflating rod according to claim 2, characterized in that, The slot (4) includes a slot wall (41) and a notch (42). The slot wall (41) is provided with a hole (43). The hole (43) is correspondingly provided with a protrusion (61). The protrusion (61) extends into the slot (4) from the hole (43) on the slot wall (41).

5. The tire pressure maintaining and inflating rod according to any one of claims 3 or 4, characterized in that, Two snap rings (6) are provided symmetrically along the rocker arm axis.

6. The tire pressure maintaining and inflating rod according to claim 5, characterized in that, The retaining ring (6) is a stainless steel spring sheet.

7. The tire pressure maintaining and inflating rod according to claim 6, characterized in that, The rocker arm (3) is fixedly provided with a rocker arm positioning sleeve (7) at one end near the slot (4).

8. The tire pressure maintaining and inflating rod according to claim 7, characterized in that, The retaining ring (6) and the rocker arm positioning sleeve (7) are fixed together or separately to the outer wall of the rocker arm (3) by screws.

9. The tire pressure maintaining and inflating rod according to claim 8, characterized in that, A retaining ring (8) is fixed inside the air tube (1) near the upper end.

10. The tire pressure maintaining and inflating rod according to claim 9, characterized in that, The air inlet pipe (2) is provided with a valve (9) and a valve handle (10), the side wall of the air inlet pipe is provided with a pressure gauge (17), and the lower end of the air inlet pipe is provided with an internal thread (19).

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