PLASTIC AIR PUMP MOVEMENT

Abstract

A plastic air pump movement comprises a plastic cylinder, a plastic piston, a plastic output plate and a power mechanism, wherein the power mechanism comprises a plastic gear, a plastic swing arm and a motor. It further comprises a plastic support for fixing and supporting the motor, the plastic gear, the plastic swing arm and the plastic cylinder. The plastic output plate is fixedly connected with the plastic cylinder by a rotary snap-fit joint. The plastic support is fixedly connected with the motor and the plastic cylinder by rotary snap-fit joints. The plastic air pump movement is integrally arranged within a plastic housing. A groove fitting with the plastic cylinder, the plastic output plate, the plastic support, the plastic swing arm, the plastic gear and the motor is provided within the plastic housing. Due to the components made of plastic material, it has light weight.

Claims

1. A plastic air pump movement, characterized in that: the plastic air pump movement comprises a plastic cylinder, a plastic piston, a plastic output plate and a power mechanism, wherein the power mechanism comprises a plastic gear, a plastic swing arm, and a motor; wherein the air pump movement further comprises a plastic support for fixing and supporting the motor, the plastic gear, the plastic swing arm and the plastic cylinder; wherein the plastic output plate is fixedly connected with the plastic cylinder by a rotary snap-fit joint, the plastic support is fixedly connected with both the motor and the plastic cylinder by rotary snap-fit joints; the plastic air pump movement is integrally arranged within a plastic housing, and a groove which fits with the plastic cylinder, the plastic output plate, the plastic support, the plastic swing arm, the plastic gear and the motor is provided within the plastic housing.

2. The plastic air pump movement according to claim 1, characterized in that: the plastic cylinder is made of PPS plastic material with high strength, the plastic cylinder is cylindrical shaped, open at both ends, and an outer wall of the plastic cylinder is provided respectively at both upper and lower ends with a protrusion extending around the plastic cylinder.

3. The plastic air pump movement according to claim 1, characterized in that: the plastic output plate is made from a combination of nylon and 30% to 35% fiberglass, the plastic output plate is lid shaped, and is provided with the rotary snap-fit joint which is snap-fitted and connected with a protrusion arranged on an outer wall at an upper end of the plastic cylinder, the plastic output plate is provided with a round shaped through hole, and the through hole is fittedly connected with a pneumatic tube.

4. The plastic air pump movement according to claim 1, characterized in that: the plastic support is made from a combination of nylon and 30% to 35% fiberglass, the plastic support is provided at an upper end with the rotary snap-fit joint which is snap-fitted and connected with a protrusion arranged on an outer wall at a lower end of the plastic cylinder.

5. The plastic air pump movement according to claim 1, characterized in that: the plastic gear comprises a big gear and a small gear which are engaged, both the big gear and the small gear are arranged in the plastic support, and the plastic gear is made from a combination of nylon and 30% to 35% fiberglass.

6. The plastic air pump movement according to claim 5, characterized in that: the plastic swing arm is made from a combination of nylon and 30% to 35% fiberglass, and the plastic swing arm has two ends, wherein an upper end is fixedly connected with the plastic piston, and a lower end is fixedly connected with a bearing of the big gear.

7. The plastic air pump movement according to claim 1, characterized in that: the plastic piston is made from a combination of nylon and 30% to 35% fiberglass, the plastic piston is fixedly connected with the plastic swing arm, a sealing ring is sleeved on the plastic piston within the plastic cylinder, and the plastic piston, the sealing ring and the plastic cylinder fit with each other and are sealingly assembled in a movable manner.

8. The plastic air pump movement according to claim 5, characterized in that: an output shaft of the motor has two ends, where one end is connected with the small gear, and the other end is connected with a fan blade.

9. The plastic air pump movement according to claim 1, characterized in that: the plastic cylinder, the plastic output plate, the plastic support and the motor are fixedly connected with the plastic housing by the groove.

10. The plastic air pump movement according to claim 1, characterized in that: the plastic housing is provided with an air outlet.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG. 1 is a schematic view of a plastic air pump movement according to a first embodiment of the present invention;

[0032] FIG. 2 is a schematic view of components of the plastic air pump movement according to the first embodiment of the present invention.

DETAILED DESCRIPTION OF ILLUSTRATED EMBODIMENTS

Embodiment 1

[0033] As shown in FIGS. 1-2, the plastic air pump movement according to the first embodiment of the present invention comprises a plastic cylinder 6, a plastic piston (not shown in the figures), a plastic output plate 7 and a power mechanism, and the power mechanism comprises a plastic gear 4, a plastic swing arm 5, and a motor 2.

[0034] The air pump movement further comprises a plastic support 3 for fixing and supporting the motor 2, the plastic gear 4, the plastic swing arm 5 and the plastic cylinder 6.

[0035] The plastic output plate 7 is fixedly connected with the plastic cylinder 6 by a rotary snap-fit joint, and the plastic support 3 is fixedly connected with both the motor 2 and the plastic cylinder 6 by rotary snap-fit joints.

[0036] The plastic air pump movement is integrally arranged within a plastic housing 1. A groove 101, which fits with the plastic cylinder 6, the plastic output plate 7, the plastic support 3, the plastic swing arm 5, the plastic gear 4, and the motor, is provided within the plastic housing 1.

[0037] Except for the motor, all components of the plastic air pump movement according to the present embodiment are made of plastics with specific material compositions. Through a lot of experiments and tests, material compositions of each component of the plastic air pump movement according to the present embodiment can be finally determined. The procedures of the experiments are as follows. Forming the air pump movement with the components made of plastic materials containing various compositions, recurrently inflating for 500 times by means of the air pump movement in a condition that the drive motor is rotated at a speed of 20000 r/min and the air pressure within the plastic cylinder is 100 psi, and observing the deformation and abrasion conditions of each component. If no deformation or abrasion occurs after 500 times of recurrent inflation, it means that the plastic material with such compositions is capable of withstanding the working conditions of the air pump movement.

[0038] The plastic gear 4 comprises a big gear 401 and a small gear 402 which are engaged. Both the big gear 401 and the small gear 402 are arranged in the plastic support. The plastic gear 4 is made from nylon in combination with 30% to 35% fiberglass. The big gear 401 and the small gear 402 are engaged with each other to rotate. If the gear wears out, the bearing of the big gear 401 may come off from the small gear 402, and the support shaft may be detached from the plastic support 3, thereby resulting in product failure and reducing service life of the air pump movement. The material containing a combination of nylon with 30% to 35% fiberglass has characteristics of high strength and high toughness, and is not easy to wear, and thus is applicable for the gear 4.

[0039] The output shaft of the motor 2 has two ends, one of which is connected with the small gear 402, and the other is connected with fan blade 10. When the motor 2 is rotated, the fan blade 10 is driven to rotate by the output shaft, to dissipate heat for the whole air pump movement. Meanwhile, the small gear 402 is driven to rotate by the output shaft, and the big gear 401 is driven to rotate by the small gear 402.

[0040] The plastic swing arm 5 has two ends. Herein, an upper end of the plastic swing arm 5 is fixedly connected with the plastic piston. The plastic piston is arranged within the plastic cylinder 6 for compressing the air in the plastic cylinder 6. A sealing ring is sleeved on the plastic piston within the plastic cylinder 6. The plastic piston, the sealing ring, and the plastic cylinder 6 fit with each other and are sealingly assembled in a movable manner. A lower end of the plastic swing arm 5 is connected with the bearing of the big gear 401. When the big gear 401 is rotated, the plastic swing arm 5 is driven to move forward and backward, whereby the plastic piston is driven to move back and forth to compress air. By the back-and-forth reciprocating motions of the plastic piston cooperated with the plastic cylinder 6 and the plastic output plate 7, the tire inflation procedure is carried out. The plastic piston is made from nylon in combination with 30% to 35% fiberglass. The plastic swing arm 5 is made from nylon in combination with 30% to 35% fiberglass.

[0041] The plastic output plate 7 substantially is the part through which the compressed air is discharged out. The plastic output plate 7 is lid shaped, and is provided with a rotary snap-fit joint which is snap-fitted and connected with a protrusion arranged on an outer wall at an upper end of the plastic cylinder 6. Since the plastic output plate 7 is disposed at the outlet for the compressed air in the cylinder, it needs to have higher strength and toughness, and be more resistant to high temperature. The plastic output plate 7 is made from nylon in combination with 30% to 35% fiberglass. The plastic output plate 7 is provided with a round shaped through hole which is fittedly connected with a pneumatic tube 8. Due to the reciprocating motions of the plastic piston, the compressed air in the plastic cylinder 6 flows to the pneumatic tube 8, and then flows from the pneumatic tube 8 to the vehicle tire, thereby achieving tire inflation.

[0042] The pneumatic tube 8 is arranged with an air pressure gauge 9 for detecting the pressure of the compressed air introduced into the tire in real time, so as to avoid tire burst due to too large tire pressure and avoid under-inflation due to too little tire pressure.

[0043] The plastic cylinder 6 is the key part of the air pump movement. When the air pump movement works, the plastic piston makes a reciprocating motion in the plastic cylinder 6 to produce air pressure. Such whole working procedure may produce higher temperature. Meanwhile, the plastic cylinder 6 needs to withstand high pressure. In this case, the plastic cylinder 6 is made of PPS plastic material with high strength. Since the PPS plastic material has high strength and high temperature resistance and is capable of withstanding high temperature over 250 degrees, it meets the requirement for the cylinder of the air pump movement. The plastic cylinder 6 is cylindrical shaped, open at both ends. The outer wall of the plastic cylinder 6 is provided, at both upper and lower ends respectively, with a protrusion extending around the plastic cylinder, so as to connect the plastic output plate 7 and the plastic support 3 in a rotary snap-fitting manner.

[0044] The plastic support 3, which is the part for connecting the motor 2, the plastic gear 4 and so on, serves for supporting and fixing the air pump movement and thus has high demands on the material. In the present embodiment, the plastic support 3 is also made from nylon in combination with 30% to 35% fiberglass. Such plastic support has high strength and high toughness. The plastic support 3 is provided at the upper end with a rotary snap-fit joint which is snap-fitted and connected with the protrusion arranged on the outer wall at the lower end of the plastic cylinder 6.

[0045] The plastic cylinder 6, the plastic output plate 7, the plastic support 3 and the motor 2 are fixedly connected with the plastic housing 1 by the groove 101. Since the air pump movement is fixed within the plastic housing 1, it is fixed and supported. Due to the groove 101 respectively fixing individual components, during inflation, the inconvenience caused by the components affected by the inertia resulting from larger impact force generated by the rotation of the motor is avoided.

[0046] The plastic housing 1, which is the part for supporting and fixing the whole air pump movement, needs to have a certain toughness and strength. It is made from nylon in combination with 30% to 35% fiberglass. The plastic housing 1 is provided with an air outlet 102 for exhausting air and dissipating heat, thereby facilitating longer working lives for the air pump movement.

[0047] In the present embodiment, all components of the air pump movement, except for the motor, are made of plastic products with specific material compositions instead of the alloy components provided in existing air pumps, and those components are connected in a rotary snap-fitting manner, thereby greatly reducing the weight of the air pump movement, facilitating convenient assembly and mounting of the air pump movement product, conducive to efficient production for the manufacturer, and greatly lowing the cost. Since the air pump movement is fixed within the plastic housing, it is fixed and supported. Due to the groove fixing individual components respectively, during inflation, the inconvenience caused by the components affected by the inertia resulting from larger impact force generated by the rotation of the motor is avoided. Due to the plastic housing fixing the air pump movement, a regular shape for the air pump movement is provided, thereby facilitating convenient carrying and preservation for the air pump movement. The material of each component in the present embodiment is determined and applied to the air pump movement after a lot of experiments and tests, and the quality and the resistant performances of the air pump movement are ensured.

[0048] The plastic air pump movement according to the present embodiment has a regular shape, which facilitates convenient carrying. It has light weight and may be portably carried in the vehicle at any time. It can also be easily spread and effectively meets the need of the air pump for inflating when the tire is deflated.

[0049] Although the present invention has been described as above with reference to the preferred embodiments, the intention is not to limit the present invention. Those skilled in the art may modify the above disclosed technical contents without departing from the scope of the present invention. The present invention is intended to cover all equivalent modifications made in accordance with the technical essence of the present invention.