Inflator pump and inflator pump core thereof

Abstract

The utility model relates to the field of inflator pumps, in particular to an inflator pump and an inflator pump core thereof, which comprise a base, and a driving component and a rocker arm which are arranged on the base, the base comprises a piston cylinder body and a support, the support is connected to one side of the opening end of the piston cylinder body, and an air outlet is formed in the end face of the other side of the piston cylinder body. The driving assembly is installed and positioned on the support, the input end of the rocker arm is connected to the output end of the driving assembly, and a piston located in the piston cylinder body is arranged at the output end of the rocker arm; the driving assembly drives the input end of the rocker arm to swing along the circumferential track, and then the piston at the output end of the rocker arm reciprocates in the piston cylinder body. According to the scheme, the structure of the inflator pump core can be simplified, the installation process is simplified, and the product cost is further reduced.

Description

Technical Field

[0001] The utility model relates to the field of air pumps, in particular to an air pump and an air pump core thereof. Background Art

[0002] The air pump core is a main functional component of an air pump (also known as a tire inflator, an inflator). It provides power through the rotation of a motor to drive a piston to compress gas, and outputs compressed air to complete the inflation function. The working process of the air pump core: when the motor runs and pumps air into the air pump, the movement of the piston rod reduces the air pressure in the air cylinder, and the valve of the communicating vessel is pushed open by the external atmospheric pressure, and the gas enters the air cylinder; when inflating a tire, the movement of the piston rod increases the air pressure in the air cylinder, the valve is closed by the air pressure in the air cylinder, and the gas enters the tire.

[0003] Currently, air pumps are widely used in fields such as automobiles, motorcycles, bicycles, balls, and rubber boats. Air pumps can play an advantage in some emergency situations. For example, when a tire is punctured and cannot be immediately transferred to a repair site, using an air pump at this time can achieve temporary air replenishment to ensure normal driving. In addition, the correct tire pressure of an automobile is crucial for the fuel efficiency of the automobile, driving safety, tire life, and operating performance of the automobile. Regularly using an air pump to detect tire pressure and replenish air to the tires in a timely manner when the tire pressure is insufficient can protect the tires and wheels to extend their life.

[0004] Existing air pumps generally include a motor, a bracket, gears, a support shaft, a piston, a cylinder, etc. Since the motor provides power to drive a certain air pressure, each component on the air pump needs to bear a certain pressure, and each component needs to be heat-resistant, high-pressure-resistant, not easily worn, impact-resistant, etc. Currently, the structures and manufacturing processes of air pumps on the market are complex, and there are many installation stations required, which is not convenient for workers to install, indirectly increasing the cost of the product. Summary of the Invention

[0005] In order to solve the above problems, the first object of the utility model is to provide an air pump core, which can simplify the structure of the air pump core and simplify the installation process, thereby reducing the product cost.

[0006] In order to achieve the above object, the utility model adopts the following technical solutions:

[0007] An inflator core includes a base, a drive assembly and a rocker arm mounted on the base; characterized in that: the base includes a piston cylinder block and a bracket, the bracket is connected to one side of the open end of the piston cylinder block, and an air outlet is provided on the end face of the other side of the piston cylinder block; the drive assembly is mounted and positioned on the bracket, the input end of the rocker arm is connected to the output end of the drive assembly, and a piston located inside the piston cylinder block is provided on the output end of the rocker arm; the drive assembly drives the input end of the rocker arm to swing along a circular trajectory, so that the piston on the output end of the rocker arm reciprocates inside the piston cylinder block.

[0008] The utility model adopts the above technical solution, which relates to an inflator core. In this inflator core, the drive assembly is mounted on the bracket of the base, the rocker arm is mounted inside the piston cylinder block of the base, and the drive assembly is drivingly connected to the rocker arm, so that the input end of the rocker arm swings along a circular trajectory, and further the piston on the output end of the rocker arm reciprocates inside the piston cylinder block, thereby pressing the gas out of the air outlet. In this way, the structure of the inflator core can be simplified, the installation process can be simplified, and the product cost can be reduced.

[0009] In a specific implementation, the drive assembly includes a drive motor mounted on the bracket, a motor gear mounted on the output shaft of the drive motor, and a drive gear rotatably provided on the bracket and meshing with the motor gear; the input end of the rocker arm is rotatably provided at the edge of the drive gear. When the drive motor drives the drive gear to rotate, the input end of the rocker arm is driven to swing circumferentially along the drive gear. In this solution, the drive motor drives the drive gear to rotate through the motor gear. During the rotation of the drive gear, the input end of the rocker arm is driven to swing circumferentially along the drive gear, and finally the piston on the output end of the rocker arm reciprocates inside the piston cylinder block.

[0010] Preferably, the piston cylinder block and the bracket of the base are integrally formed. The integrally formed base of the piston cylinder block and the bracket can be made of aluminum alloy, steel, or a mixture of alloy and plastic.

[0011] In a specific implementation, a bearing groove is provided on the bracket, and a bearing is embedded in the bearing groove; the central shaft of the drive gear passes through the center of the bearing for positioning. Based on the setting of the bearing, the drive gear can rotate more smoothly with less resistance.

[0012] Preferably, mounting holes are formed on the edge of the drive gear, and a connecting shaft is inserted into the mounting holes; the input end of the rocker arm is configured as a bushing, and the bushing is sleeved on the connecting shaft. In this solution, the drive gear and the input end of the rocker arm are connected by the connecting shaft. The connecting shaft is inserted into the mounting holes on the edge of the drive gear, so as to allow circumferential rotation along with the drive gear; the input end of the rocker arm is a bushing and is sleeved on the connecting shaft, so as to allow the input end of the rocker arm to swing relative to the connecting shaft.

[0013] Preferably, the piston includes a front annular plate and a rear annular plate disposed on the output end of the rocker arm, and a rubber ring embedded between the front annular plate and the rear annular plate; at least when the piston is pressed into the piston cylinder body, the rubber ring is in sealing fit with the inner wall of the piston cylinder body.

[0014] In a further embodiment, the piston is inclined relative to the rocker arm, and the included angle γ between the axis of the piston and the axis of the rocker arm is 2-10 degrees; during the rotation of the driving gear driven by the driving motor, when the piston is pressed into the piston cylinder body, the included angle between the axis of the piston and the axis of the piston cylinder body is α; when the piston withdraws from the piston cylinder body, the included angle between the axis of the piston and the axis of the piston cylinder body is β; α is less than β. In this embodiment, the piston on the output end of the rocker arm is constructed to be inclined, and it is required that α is less than β, which can achieve the following effects: when the piston is pressed into the piston cylinder body, the piston is pressed in a straightened state, and the piston can be sealed with the inner wall of the piston cylinder body, so as to achieve the sealing effect during air outlet; when the piston withdraws from the piston cylinder body, the piston withdraws in an inclined state, and at this time, the degree of fit between the piston and the inner wall of the piston cylinder body is low, allowing gas to be supplemented into the piston cavity, thereby increasing the air supplement amount during the operation of the piston.

[0015] Preferably, the other end of the output shaft of the driving motor extends out of the motor housing and is connected with a hot air fan. When the inflator pump core operates, the driving motor drives the hot air fan to rotate, which can dissipate heat from the core.

[0016] Preferably, the piston cylinder body is provided with a bayonet for connecting the cylinder head on the outer side wall of the air outlet. During assembly, the cylinder head can be snapped into the bayonet for quick installation.

[0017] The second object of the present invention is to provide an inflator pump, which is characterized in that it includes the inflator pump core as described above. Description of the Drawings

[0018] Figure 1 It is a three-dimensional view of the inflator pump core related to the present invention.

[0019] Figure 2 It is a sectional view of the inflator pump core related to the present invention.

[0020] Figure 3 It is an exploded view of the inflator pump core related to the present invention. Figure 1 .

[0021] Figure 4 It is an exploded view of the inflator pump core related to the present invention. Figure 2 .

[0022] Figure 5 It is a three-dimensional view of the rocker arm.

[0023] Figure 6 It is a side view of the rocker arm.

[0024] Figure 7 It is a schematic diagram of the state where the piston is pressed into the inside of the piston cylinder block.

[0025] Figure 8 It is a schematic diagram of the state where the piston withdraws from the inside of the piston cylinder block. Specific embodiments

[0026] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention 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 thus should not be construed as limiting the present invention.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "plurality" is two or more, unless otherwise clearly defined.

[0029] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed" and other terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature. Embodiment

[0031] As Figures 1 to 8 shown, this embodiment relates to an air pump core, which includes a base 1, and a driving assembly and a rocker arm 2 mounted on the base 1. The base 1 includes a piston cylinder block 11 and a bracket 12. The bracket 12 is connected to one side of the open end of the piston cylinder block 11. An air outlet 10 is provided on the end face of the other side of the piston cylinder block 11. The driving assembly is mounted and positioned on the bracket 12. The input end of the rocker arm 2 is connected to the output end of the driving assembly. A piston located inside the piston cylinder block 11 is provided on the output end of the rocker arm 2. The driving assembly drives the input end of the rocker arm 2 to swing along a circular trajectory, so that the piston 20 on the output end of the rocker arm 2 reciprocates inside the piston cylinder block 11. This technical solution relates to an air pump core. In this air pump core, the driving assembly is mounted on the bracket 12 of the base 1, the rocker arm 2 is mounted inside the piston cylinder block 11 of the base 1, the driving assembly is drivingly connected to the rocker arm 2, so that the input end of the rocker arm 2 swings along a circular trajectory, and further the piston 20 on the output end of the rocker arm 2 reciprocates inside the piston cylinder block 11, thereby pressing the gas out from the air outlet 10. In this way, the structure of the air pump core can be simplified, the installation process can be simplified, and thus the product cost can be reduced.

[0032] In Figures 1 to 4 the specific implementation shown, the driving assembly includes a driving motor 31 mounted on the bracket 12, a motor gear 32 mounted on the output shaft of the driving motor 31, and a driving gear 33 rotatably provided on the bracket 12 and meshing with the motor gear 32. The input end of the rocker arm 2 is rotatably provided at the edge of the driving gear 33. When the driving motor 31 drives the driving gear 33 to rotate, the input end of the rocker arm 2 is driven to swing circumferentially along the driving gear 33. In this solution, the driving motor 31 drives the driving gear 33 to rotate through the motor gear 32. During the rotation of the driving gear 33, the input end of the rocker arm 2 is driven to swing circumferentially along the driving gear 33, and finally the piston 20 on the output end of the rocker arm 2 reciprocates inside the piston cylinder block 11.

[0033] In addition Figures 1 to 4As shown, the other end of the output shaft of the driving motor 31 extends out of the motor housing and is connected with a hot air fan 5. When the inflation pump movement operates, the driving motor 31 drives the hot air fan 5 to rotate, which can dissipate heat from the movement.

[0034] As Figure 3 and 4 shown, the piston cylinder 11 and the bracket 12 of the base 1 are integrally formed. The base 1 with the piston cylinder 11 and the bracket 12 integrally formed can be made of aluminum alloy, steel, or a mixture of alloy and plastic. A bayonet 14 for connecting the cylinder head is constructed on the outer side wall of the piston cylinder 11 at the air outlet 10. During assembly, the cylinder head can be snapped into the bayonet 14 for quick installation. In a specific implementation, a bearing groove 120 is provided on the bracket 12, and a bearing 13 is embedded in the bearing groove 120. The central shaft of the driving gear 33 is positioned through the center of the bearing 13. Based on the setting of the bearing 13, the driving gear 33 can rotate more smoothly with less resistance. An installation hole 330 is constructed on the edge of the driving gear 33, and a connecting shaft 34 is inserted into the installation hole 330. The input end of the rocker arm 2 is constructed as a bushing, and the bushing is sleeved on the connecting shaft 34. In this solution, the driving gear 33 and the input end of the rocker arm 2 are connected through the connecting shaft 34, and the connecting shaft 34 is inserted into the installation hole 330 on the edge of the driving gear 33, thus allowing circumferential rotation along with the driving gear 33. The input end of the rocker arm 2 is a bushing 21 and is sleeved on the connecting shaft 34, specifically through a sliding bearing 35 sleeved on the connecting shaft 34, thus allowing the input end of the rocker arm 2 to swing relative to the connecting shaft 34.

[0035] As Figure 5 and 6 shown, the piston 20 includes a front annular plate 22 and a rear annular plate 23 provided at the output end of the rocker arm 2, and a rubber ring 24 embedded between the front annular plate 22 and the rear annular plate 23. At least when the piston 20 is pressed into the piston cylinder 11, the rubber ring 24 is in sealing fit with the inner wall of the piston cylinder 11. In a further solution as Figure 6 shown, the piston 20 is inclined relative to the rocker arm 2, and the included angle γ between the axis of the piston 20 and the axis of the rocker arm 2 is 2 - 10 degrees. During the process of the driving motor 31 driving the driving gear 33 to rotate, when the piston 20 is pressed into the piston cylinder 11, the included angle between the axis of the piston 20 and the axis of the piston cylinder 11 is α, as Figure 7 shown. When the piston 20 withdraws from the piston cylinder 11, the included angle between the axis of the piston 20 and the axis of the piston cylinder 11 is β, as Figure 8As shown. α is less than β. In this solution, the piston 20 on the output end of the rocker arm 2 is constructed to be inclined, and it is required that α is less than β, which can achieve the following effects: when the piston 20 is pressed into the inner part of the piston cylinder block 11, the piston 20 is pressed in a straightened state, and the piston 20 can be sealed with the inner wall of the piston cylinder block 11, so as to achieve the sealing effect during air outlet. When the piston 20 withdraws from the inner part of the piston cylinder block 11, the piston 20 withdraws in an inclined state. At this time, the degree of fit between the piston 20 and the inner wall of the piston cylinder block 11 is relatively low, allowing gas to be replenished into the cavity of the piston 20, thereby increasing the air replenishment amount during the operation of the piston 20. Embodiment

[0036] This embodiment aims to provide an air pump, including the air pump core described in Embodiment 1.

[0037] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0038] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention without departing from the principles and purposes of the present invention.

Claims

1. An air pump movement, comprising a base (1), and a drive assembly and a rocker arm (2) mounted on the base (1); characterized in that: The base (1) comprises a piston cylinder (11) and a bracket (12), the bracket (12) being connected to one side of an open end of the piston cylinder (11), and an air outlet (10) being arranged on the end surface of the other side of the piston cylinder (11); the drive assembly is mounted and positioned on the bracket (12), the input end of the rocker arm (2) is connected to the output end of the drive assembly, and the output end of the rocker arm (2) is provided with a piston (20) located in the piston cylinder (11); the drive assembly drives the input end of the rocker arm (2) to swing along a circular trajectory, thereby causing the piston (20) on the output end of the rocker arm (2) to reciprocate inside the piston cylinder (11).

2. An air pump movement according to claim 1, characterized in that: The driving assembly comprises a driving motor (31) mounted on a bracket (12), a motor gear (32) mounted on an output shaft of the driving motor (31), and a driving gear (33) rotatably disposed on the bracket (12) and meshing with the motor gear (32); the input end of the rocker arm (2) is rotatably disposed on an edge of the driving gear (33), and when the driving motor (31) drives the driving gear (33) to rotate, the input end of the driving rocker arm (2) swings along the circumferential direction of the driving gear (33).

3. An air pump movement according to claim 1, characterized in that: The piston cylinder (11) and the bracket (12) of the base (1) are integrally formed.

4. An air pump movement according to claim 2, characterized in that: The bracket (12) is provided with a bearing (13) groove (120), and a bearing (13) is embedded in the bearing (13) groove (120); the central axis of the driving gear (33) passes through the center of the bearing (13) for positioning.

5. The air pump movement according to claim 2, characterized in that: A mounting hole (330) is constructed on the edge of the driving gear (33), and a connecting shaft (34) is inserted into the mounting hole (330); the input end of the rocker arm (2) is constructed as a shaft sleeve (21), and the shaft sleeve (21) is sleeved on the connecting shaft (34).

6. An air pump movement according to claim 1, characterized in that: The piston (20) comprises a front annular plate (22) and a rear annular plate (23) arranged on the output end of the rocker arm (2), and a rubber ring (24) embedded between the front annular plate (22) and the rear annular plate (23); at least when the piston (20) is pressed into the interior of the piston cylinder (11), the rubber ring (24) is in sealing contact with the inner wall of the piston cylinder (11).

7. An air pump movement according to claim 6, characterized in that: The piston (20) is arranged to be inclined relative to the rocker arm (2), and the included angle γ between the axis of the piston (20) and the axis of the rocker arm (2) is 2-10 degrees; when the driving motor (31) drives the driving gear (33) to rotate, when the piston (20) is pressed into the interior of the piston cylinder (11), the included angle α between the axis of the piston (20) and the axis of the piston cylinder (11); when the piston (20) is withdrawn from the interior of the piston cylinder (11), the included angle β between the axis of the piston (20) and the axis of the piston cylinder (11); α is less than β.

8. The air pump movement according to claim 2, characterized in that: The other end of the output shaft of the driving motor (31) extends out of the motor housing and is connected to a hot air fan (5).

9. The air pump movement according to claim 1, characterized in that: The piston cylinder (11) is provided with a bayonet (14) on the outer side wall of the gas outlet (10) for connecting with a cylinder cover.

10. An air pump, characterized in that: The invention comprises the air pump movement according to any one of claims 1 to 9.

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