Bidirectional inflating cylinder and inflating pump

Abstract

The utility model relates to the field of tire air supplementation, and discloses a two-way inflation air cylinder and an inflation pump. The two-way inflation air cylinder comprises a mounting base fixed to a wheel hub; the two cylinder bodies are fixed to the two ends of the mounting base respectively, and exhaust ports are formed in the cylinder bodies; the piston rod is located between the two cylinder bodies, and the two ends of the piston rod are arranged in the two cylinder bodies in a telescopic mode respectively; the center shaft and the wheel hub are coaxially arranged, one end of the center shaft is connected with an external balance weight part, and when the wheel hub rotates, the center shaft is relatively static; one end of the reciprocating assembly is connected to the piston rod, and the other end of the reciprocating assembly is fixedly connected to the center shaft; when the cylinder body rotates, the reciprocating assembly enables the piston rod to do reciprocating motion relative to the cylinder body, and gas is generated. The device has the effects of improving the inflation efficiency and meeting the inflation requirements of large vehicles.

Description

Technical Field

[0001] The invention relates to the field of tire inflation, and in particular to a two-way inflation cylinder and an inflation pump. Background Art

[0002] At present, the tire pressure of a car may gradually decrease due to various uncertain factors such as air leakage and puncture during driving, and low tire pressure seriously affects the driving performance of the car. Therefore, it is particularly important to maintain the stability of the tire pressure of the car.

[0003] In the related art, a tire inflation device includes a pump body connected to a wheel hub, the pump body is provided with a cylinder hole, and the cylinder hole is vertically connected to the axial hole of the wheel hub. A piston rod is telescopically arranged in the cylinder hole, and a compression spring elastically abutting against the piston rod is arranged in the cylinder hole. The axle of the automobile is rotatably connected to the axial hole of the wheel hub through a bearing, an eccentric part is arranged at the relative position of the axle and the piston rod, and the extended end of the piston rod abuts against the eccentric part. An intake valve and an exhaust nozzle connected to the cylinder hole are arranged on the pump body, the intake valve is connected to the outside air, and the exhaust nozzle is connected to the intake nozzle of the tire. In use, the wheel hub rotates, the pump body rotates with the wheel hub, the axle and the wheel hub rotate relatively, the piston rod in the cylinder reciprocates under the joint action of the eccentric part and the compression spring, and during the reciprocating process of the piston rod, the gas is sucked in by the intake valve, and then the gas is filled into the tire through the exhaust nozzle.

[0004] However, for every rotation of the wheel hub, the piston reciprocates once in the cylinder hole, and the tire can only be inflated once. Its inflation efficiency is low and it is difficult to meet the needs of some large vehicles. Summary of the invention

[0005] The present application provides a two-way inflation cylinder and an inflation pump, which can improve the inflation efficiency and meet the inflation needs of large vehicles.

[0006] In the first aspect, an embodiment of the present application provides a bidirectional inflatable cylinder, which includes a mounting seat, which is fixed to the wheel hub; two cylinder bodies, which are respectively fixed to the two ends of the mounting seat, and the cylinder bodies are provided with exhaust ports; a piston rod, which is located between the two cylinder bodies, and the two ends are respectively telescopically arranged in the two cylinder bodies; a central axis, which is coaxially arranged with the wheel hub, and one end is connected to an external counterweight, so that when the wheel hub rotates, the central axis is relatively stationary; a reciprocating assembly, one end of which is connected to the piston rod, and the other end is fixedly connected to the central axis; when the cylinder body rotates, the reciprocating assembly causes the piston rod to reciprocate relative to the cylinder body to generate gas.

[0007] By adopting the above embodiment, when the mounting seat rotates relative to the central axis, the piston rod reciprocates along its axial direction under the action of the reciprocating assembly. During the reciprocating process of the piston rod, there is always a piston that compresses the air in the cylinder body, and the compressed air escapes from the corresponding inflation port. When the two-way inflation cylinder is applied to tire inflation, the wheel hub rotates one circle, and the two-way inflation cylinder can inflate the tire twice, thereby improving the inflation efficiency and meeting the inflation needs of large vehicles.

[0008] In combination with the first aspect, in one embodiment, the reciprocating assembly includes an eccentric shaft and a connecting rod, one end of the eccentric shaft is fixed to the central shaft, and the axis of the eccentric shaft is parallel but not colinear with the axis of the central shaft, one end of the connecting rod is rotatably mounted on the eccentric shaft, and the other end of the connecting rod is mounted on a connecting shaft, which is hinged to the piston rod.

[0009] By adopting the above embodiment, when one end of the piston rod moves toward the inside of the cylinder body, the piston at the other end performs a return motion, and there is always a piston compressing the gas in its corresponding cylinder body to generate gas with a certain pressure.

[0010] In combination with the first aspect, in one embodiment, the piston rod is provided with an avoidance hole, both ends of the eccentric shaft extend out of the avoidance hole, and the piston rod is located between the central shaft and the connecting rod.

[0011] By adopting the above embodiment, the thickness of the reciprocating assembly and the piston rod in the axial direction of the central axis can be compressed, thereby further reducing the overall thickness of the kinetic energy air pump.

[0012] In combination with the first aspect, in one embodiment, both ends of the piston rod are connected to a piston, the piston is provided with a through hole, and the through hole is covered with a one-way sealing structure for one-way sealing. When the piston moves toward the inside of the cylinder body, the one-way sealing structure blocks the through hole; when the piston moves toward the outside of the cylinder body, the one-way sealing structure does not block the through hole.

[0013] By adopting the above embodiment, when the piston moves toward the cylinder, the piston can effectively compress the gas. When the piston returns, the gas can enter the cylinder from the through hole, meeting the requirement of air intake in the cylinder and reducing the return resistance.

[0014] In combination with the first aspect, in one embodiment, the one-way sealing structure is an elastic valve sheet, and when the piston moves toward the inside of the cylinder body, the elastic valve sheet covers the through hole; when the piston moves toward the outside of the cylinder body, the elastic valve sheet pops up and leaves the through hole.

[0015] By adopting the above implementation mode, after the sheet structure is installed on the piston, it occupies less space and does not affect the stroke of the piston.

[0016] In combination with the first aspect, in one embodiment, the other end of the cylinder body is sleeved with an end cover, and the exhaust port is opened in the end cover; the end cover and the cylinder body are sealed by a sealing member.

[0017] By adopting the above implementation, the piston can compress the gas to a maximum stroke, thereby ensuring the inflation effect of the two-way inflation cylinder.

[0018] In combination with the first aspect, in one embodiment, one end of the cylinder body is plugged into the mounting seat, and the end cover and the mounting seat are connected via a connector, and the connector presses the end cover onto the end of the cylinder body.

[0019] By adopting the above embodiment, the connection between the cylinder body and the mounting seat is facilitated.

[0020] In the second aspect, an embodiment of the present application provides an air pump for a two-way air cylinder, which includes a shell, which is arranged outside the two-way air cylinder, and the mounting seat is fixed to the wheel hub through the shell; a counterweight, which is located in the shell, and the counterweight is connected to the center axis. When the shell rotates with the wheel hub, the counterweight always remains in the lower half of the shell; and an air delivery structure, which is connected to the two exhaust ports and is used to deliver the generated gas to the tire.

[0021] By adopting the above embodiment, when the car is moving, the wheel hub drives the housing to rotate, and the housing drives the cylinder to rotate, one end of the reciprocating assembly is kept stationary by the counterweight, and the other end makes the piston rod reciprocate relative to the cylinder to generate gas. The generated gas is transported to the tire through the gas transmission structure, thereby completing the inflation of the car tire.

[0022] In combination with the second aspect, in one embodiment, the air supply structure includes a first air circuit, a second air circuit and a one-way valve connected in sequence, the first air circuit is connected to the two exhaust ports, and the one-way valve is connected to the tire to prevent the gas in the tire from entering the cylinder.

[0023] By adopting the above embodiment, the gas generated in the cylinder enters the second gas path from the first gas path, and then is filled into the tire after passing through the one-way valve. The one-way valve prevents the gas in the tire from leaking into the cylinder, thereby ensuring smooth tire inflation.

[0024] In combination with the second aspect, in one implementation, a plurality of bosses are provided on a side of the mounting base close to the shell.

[0025] By adopting the above embodiment, the fine processing range of the mounting seat can be reduced and the processing efficiency of the mounting seat can be improved.

[0026] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0027] When the mounting seat rotates relative to the central axis, the piston rod reciprocates along its axial direction under the action of the reciprocating assembly. During the reciprocating process of the piston rod, there is always a piston that compresses the air in the cylinder body, and the compressed air escapes from the corresponding inflation port. When the two-way inflation cylinder is applied to tire inflation, the wheel hub rotates one circle, and the two-way inflation cylinder can inflate the tire twice, which improves the inflation efficiency and can meet the inflation needs of large vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 This is a schematic diagram of the overall structure of a two-way inflatable cylinder in an embodiment of the present application;

[0030] Figure 2 It is a schematic diagram of the overall structure of the air pump of the two-way air-inflating cylinder in the embodiment of the present application;

[0031] Figure 3 for Figure 1 The cross-sectional view along the AA direction;

[0032] Figure 4 is the motion state of the piston rod at the starting point;

[0033] Figure 5 This is the motion state of the piston rod when the wheel rotates 90° clockwise;

[0034] Figure 6 This is the motion state of the piston rod when the wheel rotates 180° clockwise;

[0035] Figure 7 This is the motion state of the piston rod when the wheel rotates 270° clockwise;

[0036] Figure 8 This is a schematic diagram of the gas transmission structure in the embodiment of the present application;

[0037] Fig. 9 A schematic diagram showing the structure of a two-way inflatable cylinder from the back of the mounting base.

[0038] In the figure:

[0039] 1. Mounting seat; 11. Boss;

[0040] 2. Cylinder body; 21. End cover; 211. Exhaust port; 22. Sealing member; 23. Connecting member;

[0041] 3. Piston rod; 31. Piston; 311. Through hole; 312. One-way blocking structure; 32. Avoidance hole;

[0042] 4. Central axis;

[0043] 5. Reciprocating assembly; 51. Eccentric shaft; 52. Connecting rod; 53. Connecting shaft;

[0044] 6. Counterweight;

[0045] 7. Shell;

[0046] 8. Gas transmission structure; 81. First gas path; 82. Second gas path; 83. One-way valve; 84. Pressure reducing relief valve. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] The embodiments of the present application provide a two-way inflation cylinder and an inflation pump, which can improve the inflation efficiency and meet the inflation needs of large vehicles.

[0049] Reference Figure 1-Figure 3 The present application discloses an embodiment of a two-way inflatable cylinder, which includes a mounting seat 1, a cylinder body 2, a piston rod 3, a central shaft 4 and a reciprocating assembly 5. The mounting seat 1 is fixed to the wheel hub, and two cylinder bodies 2 are provided. The two cylinder bodies 2 are respectively fixed to the two ends of the mounting seat 1, and the cylinder body 2 is provided with an exhaust port 211. The piston rod 3 is located between the two cylinder bodies 2, and pistons 31 are provided at both ends of the piston rod 3. The two pistons 31 are respectively connected to the two cylinder bodies 2 in a sliding and sealing manner. The central shaft 4 is coaxially arranged with the wheel hub, and one end of the central shaft 4 is connected to an external counterweight 6, so that when the wheel hub rotates, the central shaft 4 is relatively stationary. The other end of the central shaft 4 is connected to one end of the reciprocating assembly 5, and the other end of the reciprocating assembly 5 is connected to the piston rod 3. When the cylinder body 2 rotates, the counterweight 6 makes one end of the reciprocating assembly 5 stationary, and the reciprocating assembly 5 makes the piston rod 3 reciprocate relative to the cylinder body 2 to generate gas.

[0050] When the mounting seat 1 rotates relative to the central axis 4, the piston rod 3 reciprocates along its axial direction under the action of the reciprocating assembly 5. During the reciprocating process of the piston rod 3, there is always a piston 31 that compresses the air in the cylinder body 2, and the compressed air escapes from the corresponding inflation port. When the two-way inflation cylinder is applied to tire inflation, the wheel hub rotates one circle, and the two-way inflation cylinder can inflate the tire twice, thereby improving the inflation efficiency and meeting the inflation requirements of large vehicles.

[0051] Specifically, refer to Figure 3 The reciprocating assembly 5 includes an eccentric shaft 51 and a connecting rod 52. One end of the eccentric shaft 51 is fixed to the central shaft 4, and the axis of the eccentric shaft 51 is parallel to but not colinear with the rotation axis of the mounting seat 1. One end of the connecting rod 52 is rotatably sleeved on the eccentric shaft 51, and the other end of the connecting rod 52 is sleeved with a connecting shaft 53, which is hinged to the piston rod 3. In a preferred embodiment of the present application, one end of the eccentric shaft 51 and the central shaft 4 are integrally formed, thereby achieving the fixation of the eccentric shaft 51 and the central shaft 4. In other embodiments, the eccentric shaft 51 can also be fixed to the central shaft 4 by other means such as screws.

[0052] When the wheel hub rotates, the mounting seat 1 rotates with the wheel hub, the eccentric shaft 51 and the central shaft 4 remain stationary under the action of the gravity assembly, the cylinder body 2 rotates with the wheel hub, and the cylinder body 2 rotates around the axis of the central shaft 4, and the piston rod 3 also rotates with the wheel hub. Since the end of the connecting rod 52 away from the eccentric shaft 51 is hinged to the piston rod 3 through the connecting shaft 53, during the rotation of the piston rod 3, the piston rod 3 also drives the end of the connecting rod 52 away from the eccentric shaft 51 to rotate with the piston rod 3 through the connecting shaft 53, and the end of the connecting rod 52 rotates around the eccentric shaft 51. Since the eccentric shaft 51 and the central shaft 4 are eccentrically arranged, during the rotation of the connecting rod 52, the axial distance between the connecting shaft 53 and the central shaft 4 changes continuously, while the axial distance between the cylinder body 2 and the central shaft 4 remains unchanged, which enables the piston rod 3 to achieve telescopic movement in the cylinder body 2 during the rotation. When one end of the piston rod 3 moves toward the inside of the cylinder body 2, the piston 31 at the other end performs a return motion, and there is always one piston 31 compressing the gas in its corresponding cylinder body 2 to generate gas with a certain pressure.

[0053] Next, in order to further explain the working principle of the bidirectional inflatable cylinder in this embodiment, take the clockwise rotation of the wheel hub as an example, assuming that the distance between the axis of the connecting shaft 53 and the axis of the central axis 4 is L, combined with Figure 4-Figure 7 To illustrate the movement of the piston rod 3. Figure 4 At this time, the axis of the central axis 4 is located between the axis of the eccentric axis 51 and the axis of the connecting axis 53, and the three axes are collinear. The axis of the connecting axis 53 is closest to the axis of the central axis 4, and the L value is the smallest. Figure 4 The left piston 31 is at the extreme position of compression, and the right piston 31 is at the extreme position of return stroke, which is used as the starting point of the movement of the piston rod 3. The movement process of the piston rod 3 is divided into the following four stages:

[0054] 1. The wheel rotates clockwise from 0° to 90°: the motion state of the piston rod 3 changes from Figure 4 Gradually Figure 5 , the connecting axis 53 gradually moves away from the axis of the central axis 4, and the L value gradually increases. Figure 5 The piston 31 (i.e. Figure 4 The piston 31 on the right side of the middle gradually moves away from the central axis 4, and the piston 31 below compresses the air in the corresponding cylinder 2 to generate gas. Figure 5 The piston 31 (i.e. Figure 4 The left piston 31 in the middle gradually approaches the central axis 4, and the upper piston 31 performs a return motion.

[0055] 2. The wheel rotates clockwise from 90° to 180°: the motion state of the piston rod 3 changes from Figure 5 Gradually Figure 6 , during this process Figure 6 The piston 31 on the left side (i.e. Figure 4 The piston 31 on the right side of the middle still continuously compresses the gas in the cylinder 2 until the three axes are collinear again. The difference is that at this time, the axis of the eccentric shaft 51 is located between the axis of the connecting shaft 53 and the axis of the central shaft 4. At this time, the L value is the largest, and the piston 31 on the left side is in the extreme compression position. Figure 6 The piston 31 on the right side (i.e. Figure 4 The return stroke of the piston 31 on the left side ends.

[0056] 3. The wheel rotates clockwise from 180° to 270°: the motion state of the piston rod 3 changes from Figure 6 Gradually Figure 7 , the connecting shaft 53 gradually approaches the axis of the central axis 4, and the L value gradually decreases. Figure 7 The piston 31 (i.e. Figure 4 The piston 31 on the right side of the middle part performs a return motion. Figure 7 The piston 31 (i.e. Figure 4 The piston 31 on the left side performs a compression movement.

[0057] 4. The wheel rotates clockwise from 270° to 360°: the motion state of the piston rod 3 changes from Figure 7 Reply to Figure 4 , Figure 4 The piston 31 on the middle right side has completed its return stroke. Figure 4 The piston 31 on the left side is in the extreme compression position, and the piston rod 3 returns to the starting position.

[0058] It can be seen from the above four stages that in any stage there is always a piston 31 performing a compression action, thereby ensuring high efficiency of inflation.

[0059] Further, see Figure 3 The piston rod 3 is provided with an avoidance hole 32, both ends of the eccentric shaft 51 extend out of the avoidance hole 32, and the piston rod 3 is located between the gravity assembly and the connecting rod 52. Through such an arrangement, the thickness of the reciprocating assembly 5 and the piston rod 3 in the axial direction of the central axis 4 can be compressed, thereby further reducing the overall thickness of the kinetic energy air pump.

[0060] Further, see Figure 3 The piston 31 is provided with a through hole 311, and the through hole 311 is covered with a one-way blocking structure 312 for one-way blocking. When the piston 31 moves toward the inside of the cylinder body 2, the one-way blocking structure 312 blocks the through hole 311; when the piston 31 moves toward the outside of the cylinder body 2, the one-way blocking structure 312 does not block the through hole 311. With such a configuration, when the piston 31 moves toward the inside of the cylinder body 2, the piston 31 can effectively compress the gas. When the piston 31 returns, the gas can enter the cylinder body 2 from the through hole 311, which meets the air intake requirement in the cylinder body 2 and reduces the return resistance.

[0061] Further, see Figure 3 In a preferred embodiment of the present application, the one-way blocking structure 312 is an elastic valve sheet. When the piston 31 moves toward the inside of the cylinder body 2, the elastic valve sheet covers the through hole 311. When the piston 31 moves toward the outside of the cylinder body 2, the elastic valve sheet pops up and leaves the through hole 311. Through such a setting, since the structure of the elastic valve sheet is simple, the sheet structure occupies less space after being installed on the piston 31, and does not affect the stroke of the piston 31. In other embodiments, the one-way blocking structure 312 can also be a one-way valve 83. When the piston 31 performs a compression movement, the one-way valve 83 is not conductive, and when the piston 31 performs a return movement, the one-way valve 83 is conductive.

[0062] Further, see Figure 3 The end of the cylinder body 2 away from the mounting seat 1 is sleeved with an end cover 21, and the exhaust port 211 is opened in the end cover 21, and the end cover 21 and the cylinder body 2 are sealed by a seal 22. Through such an arrangement, the piston 31 can compress the gas with the maximum stroke, ensuring the inflation effect of the two-way inflation cylinder.

[0063] Further, see Figure 3, one end of the cylinder body 2 away from the end cover 21 is plugged into the mounting seat 1, and a connector 23 is provided between the end cover 21 and the mounting seat 1, and the connector 23 presses the end cover 21 to the end of the cylinder body 2, and at the same time presses the cylinder body 2 to the mounting seat 1. Specifically, in the preferred embodiment of the present application, one end of the cylinder body 2 away from the end cover 21 is stepped, and a mounting hole is provided on the mounting seat 1, and the cylinder body 2 is plugged into the mounting seat 1 through the mounting hole. In other embodiments, other plug-in structures can also be used between the cylinder body 2 and the mounting seat 1 to ensure that the cylinder body 2 and the mounting seat 1 are plugged and fixed.

[0064] Specifically, refer to Figure 1 In a preferred embodiment of the present application, the connector 23 is a screw, the threaded end of the screw is threadedly connected to the mounting base 1, and the head of the screw presses the end cap 21. In other embodiments, other connectors 23 such as bolts and nuts can also be used to achieve the connection between the end cap 21 and the mounting base 1.

[0065] Based on the above-mentioned two-way air-charging cylinder, the embodiment of the present application further discloses an air pump for a two-way air-charging cylinder, which includes a shell 7, a two-way air-charging cylinder, a counterweight 6 and an air delivery structure 8. The shell 7 is arranged outside the two-way air-charging cylinder, and the mounting seat 1 of the two-way air-charging cylinder is fixed to the wheel hub of the wheel through the shell 7. The counterweight 6 is connected to the central axis 4 of the two-way air-charging cylinder, and when the shell 7 rotates with the wheel hub, the counterweight 6 always remains in the lower half of the shell 7. The air delivery structure 8 is connected to the two exhaust ports 211 of the two-way air-charging cylinder, and is used to deliver the generated gas to the tire.

[0066] When the user uses the air pump to inflate the tire of the car, the housing 7 is fixed to the wheel hub, and the air delivery structure 8 is connected to the tire valve. When the car is moving, the wheel hub drives the housing 7 to rotate, and the housing 7 drives the cylinder 2 to rotate. One end of the reciprocating assembly 5 is kept stationary by the counterweight 6, and the other end makes the piston rod 3 reciprocate relative to the cylinder 2 to generate gas. The generated gas is delivered to the tire through the air delivery structure 8, thereby completing the inflation of the car tire.

[0067] Further, see Figure 8 The gas delivery structure 8 includes a first gas circuit 81, a second gas circuit 82 and a one-way valve 83 which are connected in sequence. The first gas circuit 81 is connected to the two exhaust ports 211, and the one-way valve 83 is connected to the tire, which is used to prevent the gas in the tire from entering the cylinder body 2. In the embodiment of the present application, the first gas circuit 81 and the second gas circuit 82 are preferably air pipes. In other embodiments, the first gas circuit 81 and the second gas circuit 82 can also be air holes, which are opened in the mounting shell. Through the above arrangement, the gas generated in the cylinder body 2 enters the second gas circuit 82 from the first gas circuit 81, and then passes through the one-way valve 83 to be filled into the tire, and the one-way valve 83 prevents the gas in the tire from leaking into the cylinder, thereby ensuring smooth inflation of the tire.

[0068] Reference Figure 8 A pressure relief valve 84 is connected between the first gas path 81 and the second gas path 82. When the pressure in the tire is greater than the pressure set by the pressure relief valve 84, the pressure relief valve 84 overflows the gas in the first gas path 81. With such a setting, when the pressure in the tire reaches the pressure set by the pressure relief valve 54, the kinetic energy air pump will not continue to inflate the tire under the overflow effect of the pressure relief valve 84, thereby preventing the kinetic energy air pump from overfilling the tire.

[0069] Further, see Fig. 9 A plurality of bosses 11 are provided on one side of the mounting seat 1 close to the housing 7, and the plurality of bosses 11 are pressed and fixed to the housing 7 by screws or other fasteners. By providing the bosses 11, the fine processing range of the mounting seat 1 can be reduced, and the processing efficiency of the mounting seat 1 can be improved.

[0070] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0071] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0072] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A two-way inflatable cylinder, characterized in that: include: A mounting seat (1) fixed to the wheel hub; Two cylinder bodies (2) are respectively fixed at two ends of the mounting base (1), and the cylinder bodies (2) are provided with exhaust ports (211); A piston rod (3), which is located between the two cylinder bodies (2), and whose two ends are respectively telescopically arranged in the two cylinder bodies (2); A central shaft (4) is coaxially arranged with the wheel hub and one end of which is connected to an external counterweight (6) so that when the wheel hub rotates, the central shaft (4) remains relatively stationary; A reciprocating assembly (5), one end of which is connected to the piston rod (3) and the other end of which is fixedly connected to the central shaft (4); When the cylinder body (2) rotates, the reciprocating assembly (5) causes the piston rod (3) to reciprocate relative to the cylinder body (2), thereby generating gas.

2. A two-way inflatable cylinder according to claim 1, characterized in that: The reciprocating assembly (5) comprises an eccentric shaft (51) and a connecting rod (52), one end of the eccentric shaft (51) is fixed to the central shaft (4), and the axis of the eccentric shaft (51) and the axis of the central shaft (4) are parallel but not colinear, one end of the connecting rod (52) is rotatably sleeved on the eccentric shaft (51), and the other end of the connecting rod (52) is sleeved on a connecting shaft (53), and the connecting shaft (53) is hinged to the piston rod (3).

3. A two-way inflatable cylinder according to claim 2, characterized in that: The piston rod (3) is provided with an avoidance hole (32), both ends of the eccentric shaft (51) extend out of the avoidance hole (32), and the piston rod (3) is located between the central shaft (4) and the connecting rod (52).

4. A two-way inflatable cylinder according to claim 1, characterized in that: Both ends of the piston rod (3) are connected to a piston (31), the piston (31) is provided with a through hole (311), and the through hole (311) is covered with a one-way blocking structure (312) for one-way blocking. When the piston (31) moves toward the inside of the cylinder body (2), the one-way blocking structure (312) blocks the through hole (311); when the piston (31) moves toward the outside of the cylinder body (2), the one-way blocking structure (312) does not block the through hole (311).

5. A two-way charging cylinder according to claim 4, characterized in that: The one-way blocking structure (312) is an elastic valve sheet. When the piston (31) moves toward the inside of the cylinder body (2), the elastic valve sheet covers the through hole (311); when the piston (31) moves toward the outside of the cylinder body (2), the elastic valve sheet pops up and leaves the through hole (311).

6. A two-way inflatable cylinder according to claim 1, characterized in that: An end cover (21) is sleeved on one end of the cylinder body (2), and the exhaust port (211) is opened on the end cover (21); the end cover (21) and the cylinder body (2) are sealed by a sealing member (22).

7. A two-way inflatable cylinder according to claim 6, characterized in that: One end of the cylinder body (2) away from the end cover (21) is plugged into the mounting seat (1), and the end cover (21) and the mounting seat (1) are connected via a connecting piece (23), and the connecting piece (23) presses the end cover (21) against the end of the cylinder body (2).

8. An air pump based on the bidirectional air-filling cylinder according to any one of claims 1 to 7, characterized in that: include: A shell (7) is arranged outside the two-way air-charging cylinder, and the mounting seat (1) is fixed to the wheel hub of the wheel through the shell (7); a counterweight (6) located in the shell (7) and connected to the central shaft (4); when the shell (7) rotates with the wheel hub, the counterweight (6) always remains in the lower half of the shell (7); The gas delivery structure (8) is connected to the two exhaust ports (211) and is used to deliver the generated gas to the tire.

9. The air pump for a two-way inflatable cylinder according to claim 8, characterized in that: The gas delivery structure (8) comprises a first gas path (81), a second gas path (82) and a one-way valve (83) which are connected in sequence, wherein the first gas path (81) is connected to the two exhaust ports (211), and the one-way valve (83) is connected to the tire to prevent the gas in the tire from entering the cylinder (2).

10. The air pump for a two-way inflatable cylinder according to claim 8, characterized in that: A plurality of bosses (11) are provided on one side of the mounting seat (1) close to the housing (7).

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