Inflator pump

Abstract

The utility model provides an inflator pump. The problems that a piston and a connecting rod in an existing pump body are integrally formed, when compressed and inflated, the piston deflects to a certain extent in the reciprocating motion process, the inflation efficiency is low, and use is inconvenient are solved. The air compressor comprises a base used for providing output, a cylinder body and an air inflation head, a compression cavity is formed in the cylinder body, a piston is movably arranged in the compression cavity, a connecting rod is rotationally arranged on the piston, the compression cavity is in a circular truncated cone shape, the diameter of the compression cavity is gradually increased from the air inflation head to a speed reduction gear, and the air inflation head is connected with the connecting rod. The piston is sleeved with a sealing ring, the piston is always right opposite to the cylinder body through the piston and the connecting rod which are rotationally connected, the air compression efficiency is effectively improved, abrasion of the sealing ring is further reduced through the circular-truncated-cone-shaped compression cavity, and the service life is greatly prolonged.

Description

Technical Field

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

[0002] Electric air pumps have been widely used in the automotive, chemical, medical and other industries. Existing electric air pumps usually use an electric motor to drive a gear transmission mechanism, and the output gear of the gear transmission mechanism drives the piston body to reciprocate in the cylinder through an eccentrically arranged connecting rod, thereby generating compressed air to inflate and pressurize equipment such as tires. However, in order to save costs, the piston and connecting rod in the pump body are integrally formed. During compression and inflation, the piston produces a certain amount of deflection during the reciprocating movement of the piston, resulting in low inflation efficiency and inconvenience in use. The existing technology has room for improvement. Summary of the invention

[0003] In view of the above existing situation, the utility model provides an air pump, including a base for providing output, a cylinder body and an air charging head, wherein the base and the air charging head are respectively located on both sides of the cylinder body, and is characterized in that a compression cavity is opened in the cylinder body, a piston is movably arranged in the compression cavity, a connecting rod is rotatably arranged on the piston, a motor is arranged on the base, a reduction gear which is always meshed with the motor is rotatably arranged between the base and the cylinder body, an end of the connecting rod away from the piston is eccentrically rotatably arranged on the reduction gear, the compression cavity is truncated, and the diameter of the compression cavity gradually increases from the air charging head toward the reduction gear, and a sealing ring is sleeved on the piston.

[0004] Preferably, a circle of flange is fixedly provided on one end of the cylinder body facing the above-mentioned inflation head, and a circle of clamping ring inserted in the flange and resting on the inner wall of the flange is fixedly provided on one end of the inflation head facing the cylinder body.

[0005] Preferably, a plurality of first positioning blocks are fixedly provided on the outer periphery of one end of the cylinder body toward the above-mentioned inflation head, and a plurality of second positioning blocks cooperating with the above-mentioned first positioning blocks are fixedly provided on the outer periphery of one end of the inflation head toward the cylinder body, and the first positioning blocks and the second positioning blocks are connected and locked by screws penetrating through the above-mentioned first positioning blocks.

[0006] Preferably, buckle plates extending toward the first positioning block and buckled on both sides of the first positioning block are fixedly provided on both sides of the second positioning block.

[0007] Preferably, a plurality of connection blocks for connecting with external devices are fixedly provided on the periphery of one end of the inflation head away from the cylinder body, and a guide slope for locking is provided on one side of the connection block facing the cylinder body.

[0008] Preferably, a plug rod extending upward and inserted into the connecting rod is fixedly provided on the reduction gear, and the plug rod is eccentrically provided on the reduction gear.

[0009] Preferably, the outer periphery of the piston is provided with a guide ring, which is located on the side of the outer periphery of the piston sealing ring away from the above-mentioned inflation head, and the diameter of the guide ring is smaller than the diameter of the above-mentioned sealing ring. The outer periphery of the guide ring is fixedly provided with a plurality of guide blocks for abutting against the inner wall of the above-mentioned compression cavity.

[0010] Compared with the prior art, in the utility model, the piston and the connecting rod are rotatably connected so that the piston is always facing the cylinder body, which effectively improves the air compression efficiency, and the frustum-shaped compression cavity further reduces the wear of the sealing ring, greatly improving the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is the overall structural view of the utility model;

[0012] Figure 2 It is a cutaway view of the utility model;

[0013] Figure 3 This is an exploded view of the structure of the utility model;

[0014] Figure 4 It is a schematic diagram of the overall structure of the inflation head;

[0015] Figure 5 It is a schematic diagram of the structure of the piston and connecting rod.

[0016] Markings in the figure: 1. base; 2. cylinder body; 3. inflation head; 4. compression chamber; 5. piston; 6. connecting rod; 7. motor; 8. reduction gear; 9. sealing ring; 10. flange; 11. retaining ring; 12. first positioning block; 13. second positioning block; 14. buckle plate; 15. connecting block; 16. guide ramp; 17. insertion rod; 18. guide ring; 19. guide block. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0018] like Figure 1-5As shown, an air pump comprises a base 1 for providing output, a cylinder 2 and an air charging head 3, the base 1 and the air charging head 3 are respectively located on both sides of the cylinder 2, and the outer periphery of the air charging head 3 away from the cylinder 2 is fixedly provided with a plurality of connection blocks 15 for connecting with external devices, and the connection block 15 is provided with a guide inclined surface 16 for locking on the side facing the cylinder 2. Through the connection block 15 and the guide inclined surface 16, the external equipment can be conveniently connected and locked, and the installation is relatively convenient. A compression cavity 4 is provided in the cylinder 2, a piston 5 is movably provided in the compression cavity 4, a connecting rod 6 is rotatably provided on the piston 5, a motor 7 is provided on the base 1, a reduction gear 8 which is always meshed with the motor 7 is rotatably provided between the base 1 and the cylinder 2, and the end of the connecting rod 6 away from the piston 5 is eccentrically rotatably provided on the reduction gear 8, and a plug rod 17 extending upward and inserted on the connecting rod 6 is fixedly provided on the reduction gear 8, and the plug rod 17 is eccentrically provided on the reduction gear 8. The compression cavity 4 is truncated cone-shaped, and the diameter of the compression cavity 4 gradually increases from the inflation head 3 to the direction of the reduction gear 8. A sealing ring 9 is sleeved on the piston 5. A circle of guide ring 18 is sleeved on the outer periphery of the piston 5. The guide ring 18 is located on the side of the outer periphery of the piston 5 away from the inflation head 3. The diameter of the guide ring 18 is smaller than the diameter of the sealing ring 9. The outer periphery of the guide ring 18 is fixed with a plurality of guide blocks 19 for abutting against the inner wall of the compression cavity 4. The guide blocks 19 and the guide ring 18 are both made of rubber. During the movement of the piston 5, the center of the piston 5 always moves along the center of the compression cavity 4 by abutting against the inner wall of the compression cavity 4 through the guide blocks 19. The piston 5 and the connecting rod 6 are connected by rotation so that the piston 5 is always facing the cylinder body 2, which effectively improves the air compression efficiency, and the wear of the sealing ring 9 is further reduced through the truncated cone-shaped compression cavity 4, greatly improving the service life.

[0019] The cylinder body 2 is fixedly provided with a circle of flange 10 at one end facing the above-mentioned inflation head 3, and the inflation head 3 is fixedly provided with a circle of snap ring 11 inserted in the flange 10 and resting on the inner wall of the flange 10 at one end facing the cylinder body 2. The cylinder body 2 is fixedly provided with a plurality of first positioning blocks 12 at the outer periphery of the end facing the above-mentioned inflation head 3, and the inflation head 3 is fixedly provided with a plurality of second positioning blocks 13 matching with the above-mentioned first positioning blocks 12 at the outer periphery of the end facing the cylinder body 2, and the first positioning blocks 12 and the second positioning blocks 13 are connected and locked by screws penetrating the above-mentioned first positioning blocks 12. The two sides of the second positioning block 13 are respectively fixedly provided with buckle plates 14 extending in the direction of the above-mentioned first positioning block 12 and buckled on both sides of the first positioning block 12. During assembly, the snap ring 11 on the inflation head 3 is inserted into the flange 10, and the first positioning block 12 is inserted between the buckle plates 14 on both sides of the second positioning block 13, so that the assembly is more convenient.

[0020] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An air pump, comprising a base (1) for providing output, a cylinder (2) and an air charging head (3), wherein the base (1) and the air charging head (3) are respectively located on both sides of the cylinder (2), and characterized in that: The cylinder body (2) is provided with a compression cavity (4), a piston (5) is movably arranged in the compression cavity (4), a connecting rod (6) is rotatably arranged on the piston (5), a motor (7) is arranged on the base (1), a reduction gear (8) which is always meshed with the motor (7) is rotatably arranged between the base (1) and the cylinder body (2), an end of the connecting rod (6) away from the piston (5) is eccentrically rotatably arranged on the reduction gear (8), the compression cavity (4) is truncated, and the diameter of the compression cavity (4) gradually increases from the inflation head (3) toward the reduction gear (8), and a sealing ring (9) is sleeved on the piston (5).

2. An air pump according to claim 1, characterized in that: A flange (10) is fixedly provided at one end of the cylinder body (2) facing the inflation head (3), and a clamping ring (11) is fixedly provided at one end of the inflation head (3) facing the cylinder body (2) and is inserted into the flange (10) and abuts against the inner wall of the flange (10).

3. An air pump according to claim 2, characterized in that: A plurality of first positioning blocks (12) are fixedly arranged on the outer periphery of one end of the cylinder body (2) facing the inflation head (3), and a plurality of second positioning blocks (13) cooperating with the first positioning blocks (12) are fixedly arranged on the outer periphery of one end of the inflation head (3) facing the cylinder body (2), and the first positioning blocks (12) and the second positioning blocks (13) are connected and locked by screws penetrating the first positioning blocks (12) and the second positioning blocks (13).

4. An air pump according to claim 3, characterized in that: Buckle plates (14) are fixedly provided on both sides of the second positioning block (13) and extend in the direction of the first positioning block (12) and buckle on both sides of the first positioning block (12).

5. An air pump according to claim 1, characterized in that: A plurality of connection blocks (15) for connecting to an external device are fixedly arranged on the outer periphery of one end of the inflation head (3) away from the cylinder body (2), and a guide inclined surface (16) for locking is provided on one side of the connection block (15) facing the cylinder body (2).

6. An air pump according to claim 1, characterized in that: The reduction gear (8) is fixedly provided with an insertion rod (17) extending upward and inserted into the connecting rod (6); the insertion rod (17) is eccentrically arranged on the reduction gear (8).

7. An air pump according to claim 1, characterized in that: A guide ring (18) is sleeved around the outer periphery of the piston (5). The guide ring (18) is located on a side of the outer periphery sealing ring (9) of the piston (5) away from the inflation head (3). The diameter of the guide ring (18) is smaller than the diameter of the sealing ring (9). A plurality of guide blocks (19) for abutting against the inner wall of the compression cavity (4) are fixedly arranged on the outer periphery of the guide ring (18).

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