A piston body

Abstract

The present invention discloses a piston body, comprising a piston head body and a support body arranged at the lower end of the piston head body; a plurality of annular grooves are arranged on the outer wall of the piston head body near the top thereof, a sealing ring is sleeved in the annular groove, and a plurality of energy storage grooves are opened at the bottom of the annular groove. The present invention can effectively prevent gas leakage when the piston head is compressed to high pressure, and has good sealing performance.

Description

Technical Field

[0001] The invention relates to the field of pistons, in particular to a piston body. Background Art

[0002] In an air compressor, the coordination between the cylinder and the piston head during operation will directly affect the working efficiency and failure rate of the air compressor. The existing piston head structure has many accessories, complex structure, and high assembly cost. During the reciprocating operation, due to the large mass of the piston head, its inertia force, friction loss, and power consumption are large. Although a sealing ring is set on the piston head, gas leakage will occur in the seal between the piston head and the sealing ring and the cylinder under high pressure. The sealing ring and the support body are also prone to eccentric friction, resulting in high exhaust temperature. Summary of the invention

[0003] The main technical problem solved by the present invention is to provide a piston body which can effectively prevent gas leakage when the piston head is compressed to high pressure and has good sealing performance.

[0004] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a piston body, including a piston head body and a support body arranged at the lower end of the piston head body; a plurality of annular grooves are provided on the outer wall of the piston head body near its top end, a sealing ring is sleeved in the annular groove, and a plurality of energy storage grooves are opened at the bottom of the annular groove.

[0005] Preferably, a plurality of air inlet holes are distributed around the circumference of the top end of the piston head body, and a valve sheet capable of closing the plurality of air inlet holes is also provided on the top end of the piston head body.

[0006] Preferably, the valve plate is arranged on the top end of the piston head body by means of bolts or screws, and the valve plate can slide on the bolts or screws.

[0007] Preferably, a valve plate groove for accommodating the valve plate is provided at the top end of the piston head body, and the surface of the valve plate groove in contact with the valve plate is a sealing plane, and the roughness of the sealing plane is Ra<0.1.

[0008] Preferably, a limiting block is fixed in the annular groove; the limiting blocks on the plurality of annular grooves are staggered and distributed; the sealing ring is C-shaped, and the distance between the two ends of the sealing ring is the same as the thickness of the limiting block.

[0009] Preferably, there are two annular grooves, each of which is provided with four energy storage grooves, and the four energy storage grooves are arranged opposite to each other and symmetrically.

[0010] Preferably, fixing holes are symmetrically formed on the outer side wall of the support body, a circle of grooves is formed on the inner side wall of the fixing holes, and elastic sealing members are arranged in the grooves.

[0011] Preferably, a protruding block is provided on the inner wall of the support body at a position corresponding to the fixing hole, and the fixing hole extends through the protruding block.

[0012] Preferably, the piston head body and the support body are molded in one step.

[0013] Preferably, the piston body is used in an air compressor; when the air compressor performs an air intake action, air passes through the inside of the support body, pushes open the valve plate, and passes through the air inlet hole to reach the air compression chamber; after the air compression chamber is filled with air, the valve plate will close automatically under the action of air pressure and stick to the sealing plane to seal the air inlet hole, so as to compress and exhaust the air in the air compression chamber.

[0014] The beneficial effects of the present invention are as follows: the present invention can effectively prevent gas leakage when the piston head is compressed to high pressure, and has good sealing performance; and the film is formed in one time, the force is balanced, and there will be no unilateral wear; the structure is simple, the movement is reliable, and the stability of the machine during operation can be guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the exploded structure of a preferred embodiment of a piston body of the present invention;

[0016] Figure 2 It is a schematic diagram of a three-dimensional structure of a piston head body and a support body of a piston body of the present invention formed by one-step compression molding;

[0017] Figure 3 It is a bottom view structural schematic diagram of a piston body of the present invention;

[0018] Figure 4 It is a left-side structural schematic diagram of a piston body of the present invention.

[0019] The markings of the components in the accompanying drawings are as follows: 1. Piston head body; 2. Support body; 3. Annular groove; 4. Energy storage groove; 5. Sealing ring; 6. Fixing hole; 7. Raised block; 8. Air inlet hole; 9. Valve plate; 10. Screw; 11. Sealing plane. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0021] See also Figures 1 to 4 , the embodiment of the present invention includes:

[0022] A piston body includes a piston head body 1 and a support body 2 arranged at the lower end of the piston head body 1; the piston head body 1 and the support body 2 are molded at one time, so that the force of the piston head is balanced and there will be no unilateral wear. Two annular grooves 3 are arranged on the outer wall of the piston head body 1 near its top, and the annular grooves 3 surround the piston head body 1. A sealing ring 5 is sleeved in the annular groove 3, which can improve the sealing between the piston head body 1 and the cylinder and avoid the phenomenon of gas leakage in the piston head during the compression process. A limiting block is fixed in the annular groove 3, and the limiting block can further limit the position of the sealing ring 5; the limiting blocks on the two annular grooves 3 are staggered to prevent local non-sealing; the sealing ring 5 is C-shaped, and the distance between the two ends of the sealing ring 5 is the same as the thickness of the limiting block, and the two ends of the sealing ring 5 are respectively against the limiting blocks. Each annular groove 3 has four energy storage grooves 4 at the bottom, and the four energy storage grooves 4 are arranged opposite to each other and symmetrically; when the air compression pressure reaches 0.6Mpa or above, a small amount of gas enters the energy storage groove 4, and under the joint action of the sealing ring 5 and the piston head body 1, an outward expansion force is formed, so that the sealing ring 5 fits tightly with the inner wall of the cylinder, effectively preventing gas leakage, improving work efficiency, and reducing the quality of the piston during operation. The top of the piston head body 1 is distributed with eight air inlet holes 8 around its circumferential direction, and the top of the piston head body 1 is also provided with a valve plate 9 that can close the eight air inlet holes 8. The valve plate 9 can fit and block the air inlet holes 8 or move away from the air inlet holes 8 to inhale air under the action of air pressure. The valve plate 9 is arranged on the top of the piston head body 1 by bolts or screws 10, and the valve plate 9 can slide on the bolts or screws 10 so that it can be sucked up or stopped for sealing according to the situation, and the valve plate 9 is easy to install and fix, and it is convenient to replace the valve plate 9 when it is damaged. The top of the piston head body 1 is provided with a valve plate groove for accommodating the valve plate 9. The surface of the valve plate groove that contacts the valve plate 9 is a sealing plane 11. The roughness of the sealing plane 11 is Ra<0.1. The size of the valve plate groove corresponds to the size of the valve plate 9. In the non-intake process, the valve plate 9 can be restricted in the valve plate groove to prevent the valve plate 9 from deforming during long-term operation. At the same time, because the sealing plane 11 is relatively smooth, the sealing between the valve plate 9 and the valve plate groove is good when the two are in contact. The outer wall of the support body 2 is symmetrically provided with fixing holes 6 so as to connect the piston body with the reciprocating motion mechanism; the inner wall of the fixing hole 6 is provided with a circle of grooves, and an elastic sealing member is arranged in the groove; the sealing at the fixing hole 6 can be ensured. A protrusion block 7 is arranged on the inner wall of the support body 2 at the position corresponding to the fixing hole 6. The fixing hole 6 extends through the protrusion block 7, which can improve the strength of the fixing hole 6 and increase the stability of the connection.

[0023] The piston body is used in an air compressor; when the air compressor performs an air suction action, air passes through the inside of the support body, pushes open the valve plate, passes through the air inlet hole and reaches the air compression chamber; after the air compression chamber is filled with air, the valve plate will automatically close under the action of air pressure and stick to the sealing plane to seal the air inlet hole, so as to compress the air in the air compression chamber and exhaust it.

[0024] The invention can effectively prevent gas leakage when the piston head is compressed to high pressure, and has good sealing performance; the film is formed in one time, the force is balanced, and there is no unilateral wear phenomenon; the structure is simple and the movement is reliable, which can ensure the stability of the machine during operation.

[0025] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A piston body, characterized in that: It includes a piston head body and a support body arranged at the lower end of the piston head body; a plurality of annular grooves are arranged on the outer wall of the piston head body near its top, a sealing ring is sleeved in the annular groove, and a plurality of energy storage grooves are opened at the bottom of the annular groove; a limiting block is fixed in the annular groove; the limiting blocks on the plurality of annular grooves are staggered; the sealing ring is C-shaped, and the distance between the two ends of the sealing ring is the same as the thickness of the limiting block; there are two annular grooves, each of which is provided with four energy storage grooves, and the four energy storage grooves are arranged opposite to each other and symmetrically; fixing holes are symmetrically opened on the outer wall of the support body, a circle of grooves is opened on the inner wall of the fixing hole, and an elastic sealing member is arranged in the groove; a protruding block is arranged at the position corresponding to the fixing hole on the inner wall of the support body, and the fixing hole extends through the protruding block.

2. A piston body according to claim 1, characterized in that: The top end of the piston head body is provided with a plurality of air inlet holes distributed around the circumference thereof, and the top end of the piston head body is also provided with a valve sheet capable of closing the plurality of air inlet holes.

3. A piston body according to claim 2, characterized in that: The valve plate is arranged on the top of the piston head body through bolts or screws, and the valve plate can slide on the bolts or screws.

4. A piston body according to claim 3, characterized in that: A valve plate groove for accommodating the valve plate is provided at the top of the piston head body, and the surface of the valve plate groove in contact with the valve plate is a sealing plane, and the roughness of the sealing plane is Ra<0.

1.

5. A piston body according to claim 1, characterized in that: The piston head body and the support body are molded in one step.

6. A piston body according to any one of the above claims, characterized in that: The piston body is used in an air compressor; when the air compressor performs an air suction action, air passes through the inside of the support body, pushes open the valve plate, passes through the air inlet hole and reaches the air compression chamber; after the air compression chamber is filled with air, the valve plate will automatically close under the action of air pressure and stick to the sealing plane to seal the air inlet hole, so as to compress the air in the air compression chamber and exhaust it.

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