Tire inflation device

Abstract

The utility model discloses a tire inflator, relates to inflator pump technical field, including shell, support, inflation drive mechanism, air tap, support plate, cover plate, circuit board and power, wherein the support is fixed in the shell, the inflation drive mechanism is fixed in the support, the air tap is installed at the rear end of the shell through thread structure, the support plate is fixed in the shell, the cover plate is fixed in the support, the circuit board is fixed in the support, and the circuit board is fixed in the support plate. The supporting plate is arranged on one side of the support, the cover plate is clamped and fixed to the end of the shell, such as glass or acrylic, pressure values displayed on the digital display screen can be seen from the outside through the cover plate, the circuit board is fixed to one side of the bottom of the support, and the power source is fixed to the other side of the bottom of the support. According to the tire inflation device, the structure that the crank is eccentrically connected with the linkage rod is adopted, and the oilless bearing is matched for use, so that compared with an existing commonly-adopted gear meshing transmission structure, on one hand, the friction force is reduced, the effectiveness of power transmission can be ensured, and on the other hand, lubricating oil does not need to be smeared, and maintenance is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of air pumps, in particular to a tire inflation device. Background Art

[0002] The electric air pump is a convenient and practical household tool designed for household inflation needs. It can not only easily complete various inflation tasks, but also has many features and advantages, making life more convenient.

[0003] In the structure of the existing electric air pump, the driving mechanism responsible for inflation generally adopts the meshing transmission between gears (as shown in CN207064179U and CN210799262U). When this transmission mode runs at high speed, on the one hand, the teeth mesh with each other, and the friction is relatively large, and the electric energy consumed by the motor will also increase accordingly. On the other hand, the gear meshing structure needs to be lubricated, so it is necessary to apply lubricating oil when leaving the factory. If new lubricating oil is required for maintenance later, it is also quite troublesome. Therefore, we propose a tire inflation device, which changes the transmission structure of the inflation drive mechanism, which not only reduces the friction but also does not require lubrication. Utility Model Content

[0004] To this end, the utility model provides a tire inflation device to solve the above-mentioned problems in the prior art.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] According to a first aspect of the utility model, a tire inflation device includes a housing, and further includes:

[0007] A bracket, wherein the bracket is fixedly installed inside the housing;

[0008] An air-charging drive mechanism, the air-charging drive mechanism is fixedly mounted inside the bracket, the air-charging drive mechanism comprises a motor, a crank is mounted on the driving end of the motor, a linkage rod is eccentrically connected to the upper part of the crank, and the two are rotatably connected via an oil-free bearing, and a piston is rotatably connected to the end of the linkage rod;

[0009] The air nozzle is detachably mounted on the rear end of the shell, and the air nozzle is connected with the air outlet end of the inflation drive mechanism.

[0010] Furthermore, the inflation drive mechanism also includes a piston cylinder, the piston reciprocates inside the piston cylinder, a one-way valve is fixedly installed on the end of the piston cylinder, an air pressure sensor is installed on the side of the one-way valve outlet end, and the detection end of the air pressure sensor extends to the inside of the outlet end.

[0011] Furthermore, the tire charging device further includes:

[0012] The support plate is arranged inside the shell and located on one side of the bracket. The bracket and the support plate are fixedly connected by a plurality of bolts.

[0013] Furthermore, a digital display screen is embedded in the end surface of the support plate facing away from the bracket, and the digital display screen can display the pressure value.

[0014] Furthermore, the tire charging device further includes:

[0015] The cover plate is clamped and fixed on the end of the shell, and the cover plate is made of transparent material.

[0016] Furthermore, the tire charging device further includes:

[0017] The circuit board is fixed to one side of the bottom of the bracket, and a charging interface and a contact switch are integrated on the circuit board.

[0018] Furthermore, the tire charging device further includes:

[0019] A power source is fixed on the other side of the bottom of the bracket, and the power source can be charged through the charging interface.

[0020] Compared with the prior art, it has the following beneficial effects:

[0021] The tire inflation device adopts a crank eccentrically connected linkage rod structure and is used in conjunction with an oil-free bearing. Compared with the existing commonly used gear meshing transmission structure, on the one hand, the friction is reduced to ensure the effectiveness of power transmission, and on the other hand, no lubricating oil is required, which is easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0023] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0024] Figure 1 This is a disassembled stereoscopic diagram of a tire inflation device provided in some embodiments of the utility model.

[0025] Figure 2 The present invention is a stereoscopic assembly diagram of a tire inflation device provided in some embodiments of the present invention.

[0026] Figure 3 A disassembled stereoscopic diagram of an inflation drive device in a tire inflation device provided in some embodiments of the utility model.

[0027] Figure 4 The present invention is a stereoscopic assembly diagram of an inflation drive device in a tire inflation device provided in some embodiments of the present invention.

[0028] Figure 5 A half-section view of an assembled tire inflation device provided in some embodiments of the utility model.

[0029] In the figure: 1. Shell; 2. Bracket; 3. Inflatable drive mechanism; 31. Motor; 32. Piston cylinder; 33. Crank; 34. Linkage rod; 35. Piston; 36. One-way valve; 37. Air pressure sensor; 38. Oil-free bearing; 4. Air nozzle; 5. Support plate; 51. Digital display screen; 6. Cover plate; 61. Reserved hole 1; 62. Reserved hole 2; 63. Switch key cap; 64. Air intake window; 7. Circuit board; 71. Charging interface; 72. Contact switch; 8. Power supply; 9. Bolt. DETAILED DESCRIPTION

[0030] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] like Figure 1 , 2As shown in Figures 3 and 5, a tire inflation device in an embodiment of the first aspect of the utility model comprises a shell 1, a bracket 2, an inflation drive mechanism 3, an air nozzle 4, a support plate 5, a cover plate 6, a circuit board 7 and a power supply 8, wherein the bracket 2 is fixedly mounted inside the shell 1, the inflation drive mechanism 3 is fixedly mounted inside the bracket 2, the air nozzle 4 is mounted at the rear end of the shell 1 through a threaded structure (the corresponding air nozzle 4 is replaced according to different inflation objects), and the air nozzle 4 is connected to the air outlet end of the inflation drive mechanism 3, the support plate 5 is arranged inside the shell 1, and is located on one side of the bracket 2, and the bracket 2 is connected to the air outlet end of the tire inflation device 1. The support plates 5 are fixedly connected by a plurality of bolts 9. A digital display screen 51 is embedded in the end surface of the support plate 5 facing away from the bracket 2. The digital display screen 51 can display the pressure value. The cover plate 6 is snap-fitted and fixed to the end of the shell 1, and the cover plate 6 is made of a transparent material such as glass or acrylic. The pressure value displayed on the digital display screen 51 can be seen from the outside through the cover plate 6. The circuit board 7 is fixed to one side of the bottom of the bracket 2, and a charging interface 71 and a contact switch 72 are integrated on the circuit board 7. The power supply 8 is fixed to the other side of the bottom of the bracket 2, and the power supply 8 can be charged through the charging interface 71.

[0032] First, if Figure 3 , 4 As shown in Figure 5, the inflation drive mechanism 3 includes a motor 31 and a piston cylinder 32, both of which are installed on the bracket 2. A crank 33 is installed at the driving end of the motor 31. The upper part of the crank 33 is eccentrically connected to a linkage rod 34, and the two are rotatably connected through an oil-free bearing 38. The end of the linkage rod 34 is rotatably connected to a piston 35, and the piston 35 reciprocates inside the piston cylinder 32. A one-way valve 36 is fixedly installed at the end of the piston cylinder 32. An air pressure sensor 37 is installed on the side of the air outlet end of the one-way valve 36. The detection end of the air pressure sensor 37 extends to the inside of the air outlet end. During the inflation process, the air pressure sensor 37 monitors the internal air pressure value of the inflated object in real time, and displays it in real time through the digital display screen 51.

[0033] It should be noted that the inflation drive mechanism 3 of the tire inflation device of this embodiment adopts a structure in which a crank 33 is eccentrically connected to a linkage rod 34, and is used in conjunction with an oil-free bearing 38. Compared with the commonly used gear transmission structure, on the one hand, the friction is reduced to ensure the effectiveness of power transmission, and on the other hand, no lubricating oil is required, which facilitates maintenance.

[0034] Second, if Figure 1 , 2 As shown, air intake windows 64 are provided at corresponding positions on the top of the support plate 5 and the cover plate 6, and reserved holes 1 61 and reserved holes 2 62 are provided at corresponding positions on the bottom of the support plate 5 and the cover plate 6. The outer end of the charging interface 71 is exposed to the outside through the reserved hole 1 61, and a switch key cap 63 is movably provided in the reserved hole 2 62. By pressing the switch key cap 63, the contact switch 72 can be triggered.

[0035] When using the tire inflation device, the corresponding air nozzle 4 is replaced according to the object to be inflated. After replacement, the air nozzle 4 is connected to the valve core of the inflated object, and then the user presses the switch key cap 63 to trigger the contact switch 72, so that the motor 31 starts working. The motor 31 drives the crank 33 to rotate at high speed. Since the crank 33 and the connecting rod 34 are eccentrically connected, when the crank 33 rotates at high speed, the connecting rod 34 will reciprocate, thereby driving the piston 35 to reciprocate in the piston cylinder 32. During the movement, external gas will enter through the air inlet window 64, and after forming air pressure, it will be delivered to the one-way valve 36. After the one-way valve 36 is opened, the gas is delivered to the air nozzle 4, thereby achieving inflation.

[0036] Although the utility model has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

[0037] The terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

Claims

1. A tire inflation device, comprising a housing (1), characterized in that: Also includes: A bracket (2), wherein the bracket (2) is fixedly mounted inside the housing (1); An air-charging drive mechanism (3), the air-charging drive mechanism (3) being fixedly mounted inside the bracket (2), the air-charging drive mechanism (3) comprising a motor (31), a crank (33) being mounted on the driving end of the motor (31), a linkage rod (34) being eccentrically connected to the upper portion of the crank (33), and the two being rotatably connected via an oil-free bearing (38), and a piston (35) being rotatably connected to the end of the linkage rod (34); An air nozzle (4) is detachably mounted on the rear end of the housing (1), and the air nozzle (4) is connected to the air outlet end of the inflation drive mechanism (3).

2. The tire inflation device according to claim 1, characterized in that: The inflation drive mechanism (3) further comprises a piston cylinder (32), the piston (35) reciprocating inside the piston cylinder (32), a one-way valve (36) fixedly mounted on the end of the piston cylinder (32), an air pressure sensor (37) mounted on the side of the air outlet end of the one-way valve (36), and a detection end of the air pressure sensor (37) extending to the inside of the air outlet end.

3. The tire inflation device according to claim 1, characterized in that: Also includes: A support plate (5), the support plate (5) is arranged inside the housing (1) and located on one side of the bracket (2), and the bracket (2) and the support plate (5) are fixedly connected by a plurality of bolts (9).

4. The tire inflation device according to claim 3, characterized in that: A digital display screen (51) is embedded in the end surface of the support plate (5) facing away from the bracket (2), and the digital display screen (51) can display pressure values.

5. The tire inflation device according to claim 1, characterized in that: Also includes: A cover plate (6), wherein the cover plate (6) is snap-fitted and fixed to the end of the shell (1), and the cover plate (6) is made of a transparent material.

6. The tire inflation device according to claim 1, characterized in that: Also includes: A circuit board (7), wherein the circuit board (7) is fixed to one side of the bottom of the bracket (2), and a charging interface (71) and a contact switch (72) are respectively integrated on the circuit board (7).

7. The tire inflation device according to claim 6, characterized in that: Also includes: A power source (8) is fixed to the other side of the bottom of the bracket (2), and the power source (8) can be charged through the charging interface (71).

Images