Automatic tire inflation device

Abstract

The invention discloses an automatic tire inflation device, relates to the technical field of tire inflation, and aims at solving the problems that an inflation device of a tire in the prior art is large in size and weight, and the tire is difficult to automatically inflate. The automatic tire inflation device comprises a cover body, a driving part, a control part, a pump valve fixing body and a pump body, the cover body and the pump body are connected to form a cavity, and the driving part, the control part and the pump valve fixing body are arranged in the cavity. And the driving piece is connected with the operating piece and is used for driving the operating piece to do reciprocating motion. The automatic tire inflation device is small in size and weight, simple in structure and capable of automatically inflating the tire and carrying out overload protection on tire air pressure.

Description

Technical Field

[0001] The invention relates to the technical field of tire inflation, and in particular to an automatic tire inflation device. Background Art

[0002] The tire pressure is closely related to the driving state of the vehicle. Due to different tire pressures, the rolling resistance of the vehicle is also different, resulting in different maneuverability and fuel consumption rates of the vehicle, which affects the driving state of the vehicle. Therefore, it is very important to automatically inflate the tires and keep the tires at the optimal pressure during driving.

[0003] At present, the inflation device of wheeled vehicles is mainly composed of air compressors, air bottles, pipelines, solenoid valves, air-controlled valves or integrated control valve boxes, wheel control valves, wheel-side rotating sealing devices, control boxes, cables and other components. It is large in size and weight, and the tire pressure can only be adjusted by the driver manually operating buttons when the vehicle is stopped or driving at a low speed. It needs to be actively controlled and adjusted by the driver, and the tire cannot be inflated automatically. The reliability and security are insufficient. Summary of the invention

[0004] In view of the above analysis, the present invention aims to provide an automatic tire inflation device to solve the problem that the tire inflation device in the prior art is large in size and weight, making it difficult to automatically inflate the tire.

[0005] The purpose of the present invention is mainly achieved through the following technical solutions:

[0006] The invention discloses an automatic tire inflation device, comprising a cover body, an operating member, a pump valve fixing body and a pump body. The cover body and the pump body are connected to form a cavity, and the operating member and the pump valve fixing body are arranged in the cavity.

[0007] Furthermore, it also includes a transmission member, one end of which is connected to the external tire, and the other end of which is connected to the pump body.

[0008] Furthermore, the pump body is connected to the pump valve fixing body to form an air path structure, and the operating member is connected to the pump body.

[0009] Furthermore, the transmission member rotates along with the external tire to drive the pump body to rotate, and the pump valve fixing body and the operating member rotate along with the pump body.

[0010] Furthermore, the cover body, the pump valve fixing body, the pump body and the transmission member are coaxially arranged with the external tire.

[0011] Furthermore, the operating member includes a ring sleeve, which is connected to the pump valve fixing body and the pump body, and the ring sleeve rotates with the pump valve fixing body and the pump body.

[0012] Furthermore, an air pump assembly is arranged in the pump body and the pump valve fixing body, and the air pump assembly includes a first air pump and a second air pump, and the first air pump and the second air pump are symmetrically arranged about the axis of the pump valve fixing body and the pump body.

[0013] Furthermore, the piston of the first air pump and the piston of the second air pump are both connected to the ring sleeve.

[0014] Furthermore, an air outlet one-way valve assembly, a first air chamber, an air inlet one-way valve assembly and a second air chamber are also arranged in the air path structure composed of the pump body and the pump valve fixing body.

[0015] Furthermore, a filter is also included.

[0016] Furthermore, it also includes a driving member, which is connected to the operating member and is used to drive the operating member to perform reciprocating motion.

[0017] Furthermore, the driving member includes an eccentric disk and a cam, the eccentric disk is fixedly connected to the cam, the cam is coaxially arranged with the pump body, two cams are arranged, the cams are arranged at an angle along the axis of the pump body, an eccentric mass block is arranged on the eccentric disk, and the eccentric mass block is used to keep the eccentric disk and the cam vertically downward with the ground under the action of gravity.

[0018] Furthermore, the cam is arranged in the ring sleeve and contacts with the roller of the ring sleeve. The shape of the ring sleeve matches with the cam, so that the ring sleeve can reciprocate under the action of the cam while rotating.

[0019] Further, the air outlet one-way valve assembly includes a first air outlet one-way valve, a second air outlet one-way valve and a third air outlet one-way valve, and the air inlet one-way valve assembly includes a first air inlet one-way valve and a second air outlet one-way valve.

[0020] Furthermore, an air intake chamber, a valve assembly and a second air chamber are also arranged in the air path structure composed of the pump valve fixing body and the pump body. The valve assembly includes a reversing stop valve, a relief pressure regulating valve and a straight-through valve. The first air chamber is connected to the first air pump through a first air outlet one-way valve, the first air chamber is connected to the second air pump through the first air intake one-way valve, the second air pump is connected to the second air chamber through the second air outlet one-way valve, the second air chamber is connected to the relief pressure regulating valve, the relief pressure regulating valve is connected to the air intake chamber, an air inlet is arranged in the air intake chamber, and the air intake chamber is connected to the first air pump through the second air intake one-way valve.

[0021] Further, the second air chamber is connected to the reversing stop valve, the reversing stop valve is communicated with the through valve, and the through valve is communicated with the first air chamber through the third air outlet one-way valve.

[0022] Furthermore, the pump body also includes a first external one-way valve and a second external one-way valve, and the first external one-way valve and the second external one-way valve are both connected to the second air chamber to allow the gas in the second air chamber to enter the external tire.

[0023] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0024] (1) The tire automatic inflation device provided by the present invention is connected to the external tire through a transmission member, and the rotation of the external tire drives the tire automatic inflation device to rotate, thereby providing power for the tire automatic inflation device. It is not necessary to connect the power supply and air source on the vehicle, and it is not necessary to set up a control box, a control valve and a pipeline, etc., which is convenient to connect with the vehicle tire. It is simple to install, convenient to use, low cost, small size, light weight and compact structure. The driving member makes the operating member reciprocate during the rotation process to control the air pump assembly, thereby controlling the gas flow direction in the tire automatic inflation device, so that the gas in the second air chamber inflates the external tire. The structure is simple and easy to use. The external tire can be automatically inflated during the driving process of the vehicle, and the driver does not need to operate and control it, so as to avoid affecting the driver's driving operation and attention, thereby improving the safety and stability of the tire automatic inflation device and improving the ability to control the air pressure of the external tire.

[0025] (2) The automatic tire inflation device provided by the present invention is connected to the external tire through a transmission member, and the number of the automatic tire inflation devices can be increased or decreased according to the number of vehicle axles, so as to match different vehicles and meet the requirements of tire inflation for different vehicles. The gas in the automatic tire inflation device is controlled by the air path structure formed by connecting the pump body and the pump valve fixing body. The flow direction of the gas can be controlled by setting the outlet check valve assembly and the inlet check valve assembly to prevent the gas from flowing in the opposite direction. The reversing stop valve can return the gas to the first air chamber when the air pressure of the external tire meets the requirements, thereby protecting the air pressure of the external tire from overload and preventing the damage of the external tire caused by the increase of tire pressure. The overflow constant pressure valve can make the gas in the second air chamber overflow to the inlet chamber to prevent the air pressure in the second air chamber from being too high. In addition, the dust adsorbed on the surface of the filter can be cleaned by backblowing, thereby increasing the safety and stability of the automatic tire inflation device.

[0026] (3) In the automatic tire inflation device provided by the present invention, the piston of the first air pump and the piston of the second air pump are both connected to the ring sleeve. By arranging an eccentric disk and a cam, the driving member is kept vertically downward with the ground and does not rotate with the external tire. When the ring sleeve rotates with the external tire, the cam can cause the ring sleeve to move around the cam, thereby affecting the movement trajectory of the ring sleeve, so that the ring sleeve can generate reciprocating motion while rotating, thereby driving the pistons of the first air pump and the second air pump to reciprocate. Through the reciprocating motion of the pistons of the first air pump and the second air pump, the gas flows from the air inlet chamber to the first air pump, and then enters the first air chamber from the first air pump, and then enters the second air pump from the first air chamber, and then flows from the second air pump to the second air chamber, and flows into the external tire through the first external one-way valve and the second external one-way valve to inflate the external tire. Gas is sucked from the air intake chamber by the first air pump, and the air intake chamber is connected with the external environment through the air inlet, so that air can be sucked from the external environment without additional air supply. The flow of gas can be achieved through the reciprocating motion of the first air pump and the second air pump. It has a compact structure and occupies a small volume. It will not affect the normal driving of the vehicle. It is easy to install and arrange, does not require manual intervention, and is easy to use and operate.

[0027] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained through the contents particularly pointed out in the embodiments of the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are only for the purpose of illustrating the particular invention and are not to be considered as limiting the invention. The same reference symbols denote the same components throughout the accompanying drawings.

[0029] Figure 1 A transverse cross-sectional view of the explosion structure of the automatic tire inflation device of the present invention;

[0030] Figure 2 It is a structural schematic diagram of the driving member of the present invention;

[0031] Figure 3 It is a schematic diagram of the structure of the operating member of the present invention;

[0032] Figure 4 It is a schematic structural diagram of the pump valve fixing body of the present invention;

[0033] Figure 5 It is a schematic diagram of the structure of the pump body of the present invention;

[0034] Figure 6 It is a principle diagram of the air path structure formed by connecting the pump body and the pump valve fixing body of the present invention.

[0035] Reference numerals:

[0036] 1-cover body; 2-driving member; 21-eccentric disk; 211-eccentric mass block; 22-cam; 3-operating member; 31-ring sleeve; 4-pump valve fixing body; 41-air outlet non-return valve assembly; 411-first air outlet non-return valve; 412-second air outlet non-return valve; 413-third air outlet non-return valve; 42-first air chamber; 43-intake non-return valve assembly; 431-first intake non-return valve; 432-second air outlet non-return valve; 5-pump body; 51-air pump assembly; 511-first air pump; 512-second air pump; 52-intake chamber; 53-valve assembly; 531-reversing stop valve; 532-overflow constant pressure valve; 533-through valve; 54-first external non-return valve; 55-second external non-return valve; 56-second air chamber; 6-transmission member; 7-filter; 8-external tire. DETAILED DESCRIPTION

[0037] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used to explain the principles of the present invention together with the present invention.

[0038] This embodiment provides a tire automatic inflation device, such as Figure 1 As shown, it includes a cover body 1, a driving member 2, an operating member 3, a pump valve fixing body 4, a pump body 5 and a transmission member 6. The cover body 1 is connected to the pump body 5 to form a cavity, and the driving member 2, the operating member 3 and the pump valve fixing body 4 are arranged in the cavity. One end of the transmission member 6 is connected to the external tire 8, and the other end is connected to the pump body 5. The pump body 5 is connected to the pump valve fixing body 4 to form an air path structure. The operating member 3 is connected to the pump body 5 and the pump valve fixing body 4. The transmission member 6 rotates with the external tire 8, driving the pump body 5 to rotate, so that the pump valve fixing body 4 and the operating member 3 rotate with the pump body 5. The driving member 2 is connected to the operating member 3, and is used to drive the operating member 3 to reciprocate, so as to control the gas flow in the air path structure composed of the pump body 5 and the pump valve fixing body 4 through the operating member 3, and inflate the external tire 8.

[0039] Further, the cover body 1 , the pump valve fixing body 4 , the pump body 5 and the transmission member 6 are coaxially arranged with the external tire 8 , so that the cover body 1 , the pump valve fixing body 4 , the pump body 5 and the transmission member 6 rotate coaxially with the external tire 8 .

[0040] like Figure 2As shown, the driving member 2 includes an eccentric disk 21 and a cam 22, the eccentric disk 21 is fixedly connected to the cam 22, the cam 22 is coaxially arranged with the pump body 5, and two cams 22 are arranged, and the cams 22 are arranged at an angle along the axis of the pump body 5. An eccentric mass block 211 is arranged on the eccentric disk 21, and the eccentric mass block 211 is used to keep the eccentric disk 21 vertically downward from the ground under the action of gravity, so that the eccentric disk 21 does not rotate with the external tire 8, thereby keeping the cam 22 in a fixed position and does not rotate with the pump body 5.

[0041] like Figure 3 As shown, the operating member 3 includes a ring sleeve 31, and the ring sleeve 31 is connected to the air path structure composed of the pump body 5 and the pump valve fixing body 4, so that the ring sleeve 31 rotates with the air path structure composed of the pump body 5 and the pump valve fixing body 4. The operating member 3 is connected to the driving member 2 through the cam 22, and the cam 22 is arranged in the ring sleeve 31 and contacts with the inner ring roller of the ring sleeve 31. The shape of the ring sleeve 31 cooperates with the cam 22, so that the ring sleeve 31 rotates and is reciprocated by the cam 22.

[0042] The pump body 5 is connected to the pump valve fixing body 4 to form an air path structure. Figure 4 As shown, the gas circuit structure includes an outlet check valve assembly 41 , a first air chamber 42 , an inlet check valve assembly 43 and a second air chamber 56 .

[0043] Furthermore, the air outlet check valve assembly 41 includes a first air outlet check valve 411 , a second air outlet check valve 412 and a third air outlet check valve 413 , and the air inlet check valve assembly 43 includes a first air inlet check valve 431 and a second air outlet check valve 432 .

[0044] like Figure 5 As shown, an air pump assembly 51 is arranged in the air circuit structure composed of a pump body 5 and a pump valve fixing body 4, and the air pump assembly 51 includes a first air pump 511 and a second air pump 512. The first air pump 511 and the second air pump 512 are symmetrically arranged about the axis of the pump body 5, and the piston of the first air pump 511 and the piston of the second air pump 512 are both connected to the ring sleeve 31. The first air pump 511 and the second air pump 512 rotate with the external tire 8, driving the ring sleeve 31 to rotate, and the ring sleeve 31 is driven by the cam 22 to reciprocate left and right, driving the piston of the first air pump 511 and the piston of the second air pump 512 to perform linear reciprocating motion.

[0045] Furthermore, if Figure 4-Figure 6As shown, the air path structure composed of the pump body 5 and the pump valve fixing body 4 is also provided with an air inlet chamber 52, a valve assembly 53 and a second air chamber 56. The valve assembly 53 includes a reversing stop valve 531, a relief pressure regulating valve 532 and a through valve 533. The first air chamber 42 is connected to the first air pump 511 through the first air outlet check valve 411, the first air chamber 42 is connected to the second air pump 512 through the first air inlet check valve 431, the second air pump 512 is connected to the second air chamber 56 through the second air outlet check valve 412, the second air chamber 56 is connected to the relief pressure regulating valve 532, the relief pressure regulating valve 532 is connected to the air inlet chamber 52, the air inlet chamber 52 is provided with an air inlet 521, and the air inlet 521 is connected to the outside, so that the gas enters the air inlet chamber 52 from the air inlet 521 under the action of the air pump assembly 51. The air inlet chamber 52 is connected to the first air pump 511 through the second air inlet check valve 432. The second air chamber 56 is connected to the reversing stop valve 531, the reversing stop valve 531 is connected to the through valve 533, the through valve 533 is connected to the first air chamber 42 through the third air outlet one-way valve 413, the reversing stop valve 531 can detect the air pressure of the external tire, when the air pressure of the external tire reaches the use requirement, the reversing stop valve 531 opens, and the gas flows to the first air chamber 42 through the reversing stop valve 531 and the through valve 533.

[0046] Furthermore, the pump body 5 also includes a first external one-way valve 54 and a second external one-way valve 55, both of which are connected to the second air chamber 56, so that the gas flows unidirectionally from the second air chamber 56 to the external tire 8 to inflate the external tire 8.

[0047] Preferably, Figure 6 As shown, the automatic tire inflation device further includes a plurality of filter discs 7, and the filter discs 7 are used to filter the gas flowing through the automatic tire inflation device.

[0048] When the tire automatic inflation device automatically inflates the external tire 8, the cover body 1, the operating member 3, the pump valve fixing body 4, the pump body 5 and the transmission member 6 rotate with the external tire 8. In the process that the ring sleeve 31 rotates with the external tire 8, the cam 22 drives the ring sleeve 31 to reciprocate, thereby driving the piston of the first air pump 511 and the piston of the second air pump 512 to perform linear reciprocating motion along with the movement of the ring sleeve 31.

[0049] The gas path structure formed by connecting the pump body 5 and the pump valve fixing body 4 is as follows Figure 6As shown, when the first air pump 511 draws gas, the gas enters the automatic tire inflation device through the air inlet 521, and enters the air inlet chamber 52 through the filter 7. The gas in the air inlet chamber 52 enters the first air pump 511 through the filter 7 and the second air inlet check valve 432 under the action of the first air pump 511; when the first air pump 511 compresses the gas, the gas flows out of the first air pump 511, enters the first air outlet check valve 411 through the filter 7, flows out of the first air outlet check valve 411 and enters the first air chamber 42 after being filtered by the filter 7.

[0050] When the second air pump 512 draws gas, the gas in the first air chamber 42 is filtered by the filter 7 under the action of the second air pump 512 and enters the first air inlet check valve 431, and is filtered by the first air inlet check valve 431 through the filter 7 and enters the second air pump 512; when the second air pump 512 compresses gas, the gas in the second air pump 512 enters the second air outlet check valve 412 through the filter 7, and is filtered by the filter 7 and enters the second air chamber 56 through the second air outlet check valve 412, and the gas in the second air chamber 56 enters the external tire 8 through the first external check valve 54 and the second external check valve 55, thereby inflating the external tire 8.

[0051] When the air pressure of the external tire 8 reaches the requirement, the reversing stop valve 531 opens, allowing the gas to flow out from the reversing stop valve 531 and the through valve 533, and after being filtered by the filter 7, flows through the third air outlet one-way valve 413 into the first air chamber 42, thereby preventing the external tire 8 from being damaged due to excessive tire pressure.

[0052] It can be understood that as the piston of the first air pump 511 and the piston of the second air pump 512 continue to move, the gas flows from the air inlet chamber 52 into the first air chamber 42 under the action of the first air pump 511, and then enters the second air chamber 56 from the first air chamber 42 under the action of the second air pump 512, so that the pressure in the second air chamber 56 gradually increases. When the pressure in the second air chamber 56 reaches the overflow pressure, the overflow constant pressure valve 532 opens, connecting the air inlet chamber 52 with the second air chamber 56, so that the gas in the second air chamber 56 overflows into the air inlet chamber 52, and is reversely connected to the external environment through the air inlet 521.

[0053] The tire automatic inflation device provided by the present invention is connected to the external tire 8 through the transmission member 6, and the rotation of the external tire 8 drives the tire automatic inflation device to rotate, thereby providing power for the tire automatic inflation device, without connecting to the power supply and air source on the vehicle, and without additionally setting up a control box, a control valve and a pipeline, etc., and is convenient to connect with the vehicle. steamThe vehicle tires are connected, and the installation is simple, the use is convenient, the cost is low, the volume is small, the weight is light, and the structure is compact. The driving member 2 causes the operating member 3 to reciprocate during the rotation process, thereby controlling the air pump assembly 51, thereby controlling the gas flow direction in the tire automatic inflation device, so that the gas in the second air chamber inflates the external tire 8. The structure is simple, the use is convenient, and the driver does not need to operate and control, so as to avoid affecting the driver's driving operation and attention, thereby improving the safety and stability of the tire automatic inflation device.

[0054] The tire automatic inflation device provided by the present invention can increase or decrease the number of the tire automatic inflation devices according to the number of axles of the vehicle, so as to match different vehicles and meet the use requirements of tire inflation of different vehicles. The gas in the tire automatic inflation device is controlled by the air path structure formed by connecting the pump body 5 and the pump valve fixing body 4. The flow direction of the gas can be controlled by setting the outlet check valve assembly 41 and the inlet check valve assembly 43 to prevent the gas from flowing in the opposite direction; the reversing stop valve 531 can return the gas to the first air chamber when the air pressure of the external tire 8 meets the requirements, thereby overloading the air pressure of the external tire 8 and preventing the damage of the external tire caused by the increase of tire pressure; the overflow constant pressure valve 532 can make the gas in the second air chamber 56 overflow to the inlet chamber 52 to prevent the air pressure in the second air chamber 56 from being too high, and the dust adsorbed on the surface of the filter 7 can be cleaned by backblowing, thereby increasing the safety and stability of the tire automatic inflation device.

[0055] In the automatic tire inflation device provided by the present invention, the piston of the first air pump 511 and the piston of the second air pump 512 are both connected to the ring sleeve 31. The eccentric disk 21 and the cam 22 are arranged to keep the driving member 2 vertically downward with the ground and not rotate with the external tire 8. When the ring sleeve 31 rotates with the external tire 8, the cam 22 can make the ring sleeve 31 rotate around the cam 22, thereby affecting the movement trajectory of the ring sleeve 31, so that the ring sleeve 31 can generate reciprocating motion while rotating, thereby driving the pistons of the first air pump 511 and the second air pump 512 to reciprocate. Through the reciprocating motion of the pistons of the first air pump 511 and the second air pump 512, the gas flows from the air inlet chamber 52 to the first air pump 511, and then enters the first air chamber 42 from the first air pump 511, enters the second air pump 512 from the first air chamber 42, and then flows from the second air pump 512 to the second air chamber 56, and flows into the external tire 8 through the first external one-way valve 54 and the second external one-way valve 55 to inflate the external tire 8. Gas is sucked from the air inlet chamber 52 through the first air pump 511, and the air inlet chamber 52 is connected to the external environment through the air inlet 521, so that air can be sucked from the external environment without additional air supply. The air path structure composed of the pump body 5 and the pump valve fixing body 4 enables the flow of gas, has a compact structure, occupies a small volume, and is easy to install and arrange.

[0056] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A tire automatic inflation device, characterized in that: The invention comprises a cover body (1), an operating member (3), a pump valve fixing body (4) and a pump body (5); the cover body (1) and the pump body (5) are connected to form a cavity; the operating member (3) and the pump valve fixing body (4) are arranged in the cavity.

2. The automatic tire inflation device according to claim 1, characterized in that: It also comprises a transmission member (6), one end of which is connected to the external tire (8), and the other end of which is connected to the pump body (5).

3. The automatic tire inflation device according to claim 2, characterized in that: The pump body (5) is connected to the pump valve fixing body (4) to form an air path structure, and the operating member (3) is connected to the air path structure formed by the pump body (5) and the pump valve fixing body (4).

4. The automatic tire inflation device according to claim 3, characterized in that: The transmission member (6) rotates along with the external tire (8) to drive the pump body (5) to rotate, and the pump valve fixing body (4) and the operating member (3) rotate along with the pump body (5).

5. The automatic tire inflation device according to claim 4, characterized in that: The cover body (1), the pump valve fixing body (4), the pump body (5) and the transmission member (6) are coaxially arranged with the external tire (8).

6. The automatic tire inflation device according to claim 5, characterized in that: The operating member (3) comprises a ring sleeve (31), the ring sleeve (31) is connected to the pump valve fixing body (4), and the ring sleeve (31) rotates with the pump valve fixing body (4).

7. The automatic tire inflation device according to claim 6, characterized in that: An air pump assembly (51) is arranged in the air path structure composed of the pump valve fixing body (4) and the pump body (5), and the air pump assembly (51) includes a first air pump (511) and a second air pump (512), and the first air pump (511) and the second air pump (512) are symmetrically arranged about the axis of the pump valve fixing body (4) and the pump body (5).

8. The automatic tire inflation device according to claim 7, characterized in that: The piston of the first air pump (511) and the piston of the second air pump (512) are both connected to the ring sleeve (31).

9. The automatic tire inflation device according to claim 8, characterized in that: An air outlet check valve assembly (41), a first air chamber (42), an air inlet check valve assembly (43) and a second air chamber (56) are also provided in the air path structure formed by the pump body (5) and the pump valve fixing body (4).

10. The automatic tire inflation device according to any one of claims 1 to 9, characterized in that: Also included is a filter (7).

Images