CN113915100B - Assembling method of compressor with gear mechanism driving piston - Google Patents

Assembling method of compressor with gear mechanism driving piston Download PDF

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Publication number
CN113915100B
CN113915100B CN202111294080.2A CN202111294080A CN113915100B CN 113915100 B CN113915100 B CN 113915100B CN 202111294080 A CN202111294080 A CN 202111294080A CN 113915100 B CN113915100 B CN 113915100B
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CN
China
Prior art keywords
gear
piston
internal gear
hole
compressor
Prior art date
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Active
Application number
CN202111294080.2A
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Chinese (zh)
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CN113915100A (en
Inventor
何景云
王世林
吴大奎
洪钧
张小利
李少铭
叶涛
田艳春
陶露
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Wuhu Abaur Mechanical & Electrical Co ltd
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Wuhu Abaur Mechanical & Electrical Co ltd
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Publication of CN113915100A publication Critical patent/CN113915100A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/01Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being mechanical
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0005Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00 adaptations of pistons

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
  • Compressor (AREA)

Abstract

The invention discloses an assembling method of a compressor with a gear mechanism driving piston, wherein a main transmission gear (4) fixedly connected with a motor main shaft (10) is arranged at the end part of the motor main shaft (10), and the main transmission gear (4) is a cylindrical external gear; the main transmission gear (4) is meshed with the internal gear; the internal gear is connected with the piston (6) through a connecting rod (11); the connecting rod (11) is fixedly connected with the internal gear into a whole. By adopting the technical scheme, the vibration and noise of the compressor are reduced; the oil discharge of the lubricating oil is less, and meanwhile, the refrigerating efficiency is improved.

Description

Assembling method of compressor with gear mechanism driving piston
Technical Field
The invention belongs to the technical field of refrigeration compressor structures. More particularly, the present invention relates to a method of assembling a compressor with a gear mechanism driving a piston.
Background
The traditional refrigerator and freezer compressor adopts a crank-link mechanism to realize reciprocating motion so as to achieve the air suction and exhaust process of the compressor;
as shown in fig. 1, a crank-link mechanism in the prior art comprises a crank main shaft 10, a link 11, a piston 6 and a piston pin, wherein the crank main shaft 10 is utilized to rotate to drive the link 11 and the piston pin to realize the reciprocating motion of the piston 6 so as to form the suction and the exhaust of the compressor; because the compressor speed is constant, once the cylinder bore is eccentric to the crankshaft, the displacement is inconvenient to adjust; in addition, because the crank-link mechanism generates rotation and reciprocation during high-speed movement, rotation inertia force and reciprocation inertia force are generated, and when the balance weight 12 is added for balancing, a part of unbalanced force is increased from the reciprocation direction to the horizontal direction, and meanwhile, the second-order reciprocation inertia force is not balanced, and the reciprocation inertia force is not balanced completely, so that the compressor vibrates; vibration is a source of all noise generation, and thus vibration causes an increase in compressor noise.
In addition, as shown in fig. 1, in the prior art, in order to assemble the piston pin, a cylinder seat crescent groove 8 with a process structure needs to be machined on the cylinder seat, the groove is arranged to be purely for assembling the piston pin, the depth of the cylinder seat crescent groove 8 is generally 7-8 mm, different eccentric crank shafts generally have different depths of the crescent groove, and the smaller eccentric crank shaft is, the deeper the depth of the cylinder seat crescent groove 8 is; however, after the cylinder seat crescent groove 8 is processed, because the compressor splashes and lubricates, a part of refrigerating machine oil enters from the crescent groove, so that the oil discharge risk of the compressor is increased; on the other hand, the cylinder head sealing section is reduced, and the risk that one oil product enters the refrigerant is increased due to the fact that the refrigerating machine oil is added, so that the refrigerating capacity of the compressor is reduced, and the oil discharge is increased.
Aiming at the defects, a new structure is needed to realize a new pump body of the compressor with adjustable displacement, low vibration noise, high refrigeration capacity and less oil discharge.
Disclosure of Invention
The invention provides a compressor with a gear mechanism driving a piston, which aims to reduce vibration and noise of the compressor.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the invention relates to a compressor with a gear mechanism driving a piston, which comprises a cylinder seat, a piston and a motor main shaft; the end part of the motor main shaft is provided with a main transmission gear fixedly connected with the motor main shaft, and the main transmission gear is a cylindrical external gear; the main transmission gear is meshed with the internal gear; the internal gear is connected with the piston through a connecting rod; the connecting rod is fixedly connected with the internal gear into a whole.
The internal gear is a cylindrical internal gear. Or the internal gear is a long waist round internal gear; the long waist round shape length direction piston axis of the long waist round shape internal gear is in the same plane.
One side of the internal gear opposite to the connecting rod is provided with a limiting rod, and one end of the limiting rod is fixedly connected with the internal gear into a whole; the tail part of the cylinder seat is provided with a positioning plate with a plane perpendicular to the axis of the piston, and the positioning plate is provided with a limiting hole; the other end of the limiting rod is inserted into the limiting hole; the limiting hole is a long waist round hole, and the length direction of the limiting hole is the same as the swinging direction of the limiting rod.
The end part of the motor main shaft is provided with a gear positioning shaft, and one section of the axial direction of the gear positioning shaft is matched with a central hole of the end part of the motor main shaft; the inner hole of the main transmission gear is matched with the outer cylindrical surface of the gear positioning shaft, and the main transmission gear is circumferentially fixed through a fixed key.
The gear positioning shaft is provided with an oil drain hole which is communicated with a spiral main shaft oil duct on the outer cylindrical surface of the main shaft of the motor.
In order to achieve the same object as the technical scheme, the invention also provides an assembly method of the compressor with the gear mechanism driving piston, which comprises the following steps:
the positioning shaft is mounted on a motor main shaft through a key slot; simultaneously, the gear positioning shaft is installed and connected with the main transmission gear through a fixed key;
assembling the internal gear with a piston through a connecting rod end part and a piston pin; the piston pin is assembled in the pin hole of the piston and penetrates through the pin hole at the end part of the connecting rod, and the piston pin and the pin hole of the connecting rod are matched according to a certain clearance to realize free swing;
and simultaneously, inserting a limiting rod on the internal gear into a limiting hole on a positioning plate, then fixedly connecting the positioning plate at the tail part of the cylinder seat, ensuring that the positioning plate cannot loosen, and at the moment, realizing the engagement of the tooth shape of the internal gear and the tooth shape of the main transmission gear.
The piston pin is assembled in the pin hole of the piston through a cylinder seat crescent groove.
The piston pin is assembled in the pin hole of the piston through a crescent groove of the cylinder seat; the depth of the crescent groove of the cylinder seat is 2.5-4.5 mm.
The main transmission gear and the internal gear are made of one of polytetrafluoroethylene, PA66 and polyoxymethylene.
By adopting the technical scheme, the invention reduces the vibration and noise of the compressor and realizes adjustable displacement; the oil discharge of the lubricating oil is less, and meanwhile, the refrigerating efficiency is improved.
By adopting the technical scheme, the main transmission gear of the crankshaft rotates around the rotating central line without any offset, so that noise and vibration caused by unbalanced force inertia force are greatly reduced, and the vibration and noise of the compressor are reduced; high-strength plastic is adopted to replace a metal gear, so that collision among parts is reduced, and noise and vibration are further reduced; meanwhile, in the assembly process, an integral cylinder seat or a cylinder seat with the depth of a crescent groove which is 3-5 mm smaller than that of a crescent groove in the prior art can be adopted; the sealing end of the piston and the cylinder hole of the cylinder seat is lengthened, the hidden danger that lubricating oil enters a refrigerant system is reduced, the oil discharge of the compressor is small, the purity of the refrigerant participating in refrigeration is improved, and the refrigeration efficiency is improved. Meanwhile, the displacement is also adjustable.
Drawings
The contents of the drawings and the marks in the drawings are briefly described as follows:
FIG. 1 is a schematic diagram of a prior art compressor pump body;
FIG. 2 is a schematic view of a structure of the present invention using a cylindrical internal gear;
FIG. 3 is a schematic view of an internal gear with an oblong shape
FIG. 4 is an isometric view of a main drive gear, positioning shaft and motor spindle assembly;
FIG. 5 is an end view schematic of a main drive gear, positioning shaft and motor spindle assembly;
FIG. 6 is an end view schematic of a positioning shaft coupled to a motor spindle assembly;
fig. 7 is a sectional view in the direction a-a in fig. 6.
Marked in the figure as:
1. the device comprises a cylinder seat, 2, a gear positioning shaft, 3, a cylindrical internal gear, 4, a main transmission gear, 5, a positioning plate, 6, a piston, 7, a long-kidney-shaped internal gear, 8, a cylinder seat crescent groove, 9, a main shaft oil duct, 10, a motor main shaft (a crankshaft main shaft in fig. 1), 11, a connecting rod, 12, a balance block, 13, a limiting rod, 14, a limiting hole, 15, a fixed key, 16 and an oil drain hole.
Detailed Description
The following detailed description of the embodiments of the invention, given by way of example only, is presented in the accompanying drawings to aid in a more complete, accurate, and thorough understanding of the inventive concepts and aspects of the invention by those skilled in the art.
The structure of the invention as shown in fig. 2 and 3 is two schemes of a compressor with a gear mechanism driving a piston; the compressor comprises a cylinder block 1, a piston 6 and a motor spindle 10.
In order to overcome the defects of the prior art and realize the aim of reducing the vibration and noise of the compressor, the invention adopts the following technical scheme:
as shown in fig. 2 and 3, the gear mechanism of the invention drives the compressor of the piston, the end part of the motor main shaft 10 is provided with a main transmission gear 4 fixedly connected with the motor main shaft 10, and the main transmission gear 4 is a cylindrical external gear; the main transmission gear 4 is meshed with the internal gear; the internal gear is connected with the piston 6 through a connecting rod 11; the connecting rod 11 is fixedly connected with the internal gear into a whole.
The gear variable displacement compressor mechanism is applied to converting the rotary motion of a motor main shaft 10 into the reciprocating linear motion of a piston 6, so as to realize the compression of a refrigerant; because the eccentric problem of the crankshaft is avoided, vibration and noise are greatly reduced, and the adjustable displacement, low noise vibration, less oil discharge and improved refrigeration efficiency are realized.
The following are two different embodiments of the gear train:
1. the internal gear is a cylindrical internal gear 3, see fig. 2;
2. or the internal gear is a long waist round internal gear 7; the axes of the long-kidney-shaped length direction pistons 6 of the long-kidney-shaped internal gear 7 are in the same plane, see fig. 3.
Specifically:
the cylindrical internal gear 3 or the long-kidney-shaped internal gear 7 is meshed with the main transmission gear 4, and the number of teeth Z1 of the main transmission gear is smaller than the number of teeth Z2 of the cylindrical internal gear 3 or the long-kidney-shaped internal gear 7.
In the process of meshing the cylindrical internal gear 3 or the long-kidney-shaped internal gear 7 with the main transmission gear 4, the power of the motor main shaft 10 is transmitted to the cylindrical internal gear 3 or the long-kidney-shaped internal gear 7, and the reciprocating linear motion of the piston 6 and the cylinder hole is formed.
As shown in fig. 2 and 3:
a limiting rod 13 is arranged on one side of the inner gear opposite to the connecting rod 11, and one end of the limiting rod 13 is fixedly connected with the inner gear into a whole; the tail of the cylinder seat 1 is provided with a positioning plate 5 with a plane perpendicular to the axis of the piston 6, and the positioning plate 5 is provided with a limiting hole 14; the other end of the limiting rod 13 is inserted into the limiting hole 14; the limiting hole 14 is a long waist round hole, and the length direction of the limiting hole is the same as the swinging direction of the limiting rod 13.
The limiting rod 13 is connected with the cylindrical internal gear 3 or the long-waist round internal gear 7 and forms a whole, and through the limiting hole 14 on the positioning plate 5, the abnormal phenomena such as tooth disengagement and the like can not occur in the meshing process of the cylindrical internal gear 3 or the long-waist round internal gear 7 and the main transmission gear 4.
The locating plate 5 is embedded at the tail of the cylinder seat and is in interference connection with the tail of the cylinder seat, and firm connection is ensured. And a limiting hole 14 in the middle of the positioning plate, wherein the diameter of the limiting hole 14 is about 1.5mm larger than the true diameter of the limiting rod 13, so that the limiting rod 13 is ensured to swing and be restrained in the limiting hole 14.
As shown in fig. 4 to 7:
the end part of the motor main shaft 10 is provided with a gear positioning shaft 2, and one section of the axial direction of the gear positioning shaft 2 is matched with a central hole at the end part of the motor main shaft 10; the inner hole of the main transmission gear 4 is matched with the outer cylindrical surface of the gear positioning shaft 2, and is circumferentially fixed through a fixed key 15.
The gear positioning shaft 2 is connected with the motor main shaft 10 through a key slot and is firmly assembled in a central hole of the motor main shaft 10; the main transmission gear 4 is tightly connected with the gear positioning shaft 2 through a key groove.
The gear positioning shaft 2 is provided with an oil drain hole 16, and the oil drain hole 16 is communicated with a spiral main shaft oil duct 9 on the outer cylindrical surface of the main shaft 10 of the motor.
The oil hole of the gear positioning shaft 2 is communicated with the oil hole of the motor main shaft 10, and oil is splashed to the matching surfaces of the motion pairs of all parts of the pump body from the oil hole of the gear positioning shaft 2 through centrifugal pump oil of the crankshaft.
As shown in fig. 3, the piston pin is assembled in the pin hole of the piston 6 through the cylinder seat crescent groove 8; the depth of the cylinder seat crescent groove 8 is 2.5-4.5 mm. Or the cylinder seat is directly not provided with a crescent groove, and the installation is not influenced.
In the assembly process, an integral cylinder seat or a cylinder seat with the depth of a crescent groove reduced by 3-5 mm compared with the prior art can be adopted; the sealing end of the piston and the cylinder hole of the cylinder seat is lengthened, the hidden danger that lubricating oil enters a refrigerant system is reduced, the oil discharge of the compressor is small, the purity of the refrigerant participating in refrigeration is improved, and the refrigeration efficiency is improved.
The main transmission gear 4 and the internal gear are made of one of polytetrafluoroethylene, PA66 and polyoxymethylene.
The high-strength plastic is adopted to replace a metal gear, so that the weight is reduced, the flexibility is certain, the collision among parts is reduced, and the impact noise is reduced; the self-lubricating performance is good, and the noise and vibration are further reduced.
In order to achieve the same object as the technical scheme, the invention also provides an assembly method of the compressor with the gear mechanism driving piston, which comprises the following steps:
the positioning shaft 2 is mounted on the motor main shaft 10 through a key slot; simultaneously, the gear positioning shaft 2 is installed and connected with the main transmission gear 4 through a fixed key 15;
assembling the internal gear with the piston 6 through the end part of the connecting rod 11 and the piston pin; the piston pin is assembled in the pin hole of the piston 6 and penetrates through the pin hole at the end part of the connecting rod 11, and the piston pin is matched with the pin hole of the connecting rod 11 according to a certain clearance to realize free swing;
the tooth holes of the internal gear are matched with the main transmission gear 4, meanwhile, the limiting rod 13 on the internal gear is inserted into the limiting hole 14 on the positioning plate 5, then the positioning plate 5 is fastened and connected to the tail of the cylinder seat, the positioning plate 5 is ensured not to loosen, and at the moment, the tooth shape of the internal gear is meshed with the tooth shape of the main transmission gear 4.
In order to improve the refrigerating capacity of the compressor, the inner hole of the inner gear is larger than the outer diameter of the main transmission gear 4, and the gap between the inner gear and the main transmission gear can ensure that the piston is assembled in the cylinder hole after the piston pin is assembled.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the above embodiments, but is capable of being modified or applied directly to other applications without modification, as long as various insubstantial modifications of the method concept and technical solution of the invention are adopted, all within the scope of the invention.

Claims (5)

1. The assembly method of the compressor of the driving piston of the gear mechanism, the said compressor includes cylinder block (1), piston (6) and motor spindle (10); the end part of the motor main shaft (10) is provided with a main transmission gear (4) fixedly connected with the motor main shaft (10), and the main transmission gear (4) is a cylindrical external gear; the main transmission gear (4) is meshed with the internal gear; the internal gear is connected with the piston (6) through a connecting rod (11); the connecting rod (11) is fixedly connected with the internal gear into a whole;
a limiting rod (13) is arranged on one side of the inner gear opposite to the connecting rod (11), and one end of the limiting rod (13) is fixedly connected with the inner gear into a whole; the tail of the cylinder seat (1) is provided with a positioning plate (5) with a plane perpendicular to the axis of the piston (6), and the positioning plate (5) is provided with a limiting hole (14); the other end of the limiting rod (13) is inserted into the limiting hole (14); the limiting hole (14) is a long waist round hole, and the length direction of the limiting hole is the same as the swinging direction of the limiting rod (13);
the end part of the motor main shaft (10) is provided with a gear positioning shaft (2), and one section of the gear positioning shaft (2) in the axial direction is matched with a central hole at the end part of the motor main shaft (10); the inner hole of the main transmission gear (4) is matched with the outer cylindrical surface of the gear positioning shaft (2), and is circumferentially fixed through a fixed key (15);
the assembly method is characterized by comprising the following steps:
the gear positioning shaft (2) is mounted on a motor main shaft (10) through a key slot; simultaneously, the gear positioning shaft (2) is connected with the main transmission gear (4) in an installation way through a fixed key (15);
assembling the inner gear with the piston (6) through the end part of the connecting rod (11) and the piston pin; the piston pin is assembled in a pin hole of the piston (6) and penetrates through the pin hole at the end part of the connecting rod (11), and the piston pin is matched with the pin hole of the connecting rod (11) according to a certain clearance to realize free swing;
the tooth holes of the internal gear are matched with the main transmission gear (4), meanwhile, a limiting rod (13) on the internal gear is inserted into a limiting hole (14) on the positioning plate (5), then the positioning plate (5) is fastened and connected to the tail of the cylinder seat, the positioning plate (5) is ensured not to loosen, and at the moment, the tooth shape of the internal gear is meshed with the tooth shape of the main transmission gear;
the piston pin is assembled in a pin hole of the piston (6) through a cylinder seat crescent groove (8); the depth of the cylinder seat crescent groove (8) is 2.5-4.5 mm.
2. A method of assembling a gear mechanism driven piston compressor in accordance with claim 1, wherein: the internal gear is a cylindrical internal gear (3).
3. A method of assembling a gear mechanism driven piston compressor in accordance with claim 1, wherein: the internal gear is a long waist round internal gear (7); the long-kidney-shaped length direction of the long-kidney-shaped internal gear (7) and the axis of the piston (6) are in the same plane.
4. A method of assembling a gear mechanism driven piston compressor in accordance with claim 1, wherein: the gear positioning shaft (2) is provided with an oil drain hole (16), and the oil drain hole (16) is communicated with a spiral main shaft oil duct (9) on the outer cylindrical surface of the motor main shaft (10).
5. A method of assembling a gear mechanism driven piston compressor in accordance with claim 1, wherein: the main transmission gear (4) and the internal gear are made of one of polytetrafluoroethylene, PA66 and polyoxymethylene.
CN202111294080.2A 2021-11-03 2021-11-03 Assembling method of compressor with gear mechanism driving piston Active CN113915100B (en)

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CN113915100B true CN113915100B (en) 2024-02-20

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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11294329A (en) * 1998-04-14 1999-10-26 Denso Corp Air compressor
WO2006049268A1 (en) * 2004-11-01 2006-05-11 Hiroshi Morikawa Mutual conversion method between linear/rotational motion of reciprocal engine
CN1779252A (en) * 2004-11-26 2006-05-31 乐金电子(天津)电器有限公司 Transmission device of closed compressor
CN101158316A (en) * 2007-08-19 2008-04-09 张连奎 Non-round annular wheel crankless engines
CN102230423A (en) * 2011-05-23 2011-11-02 舒锦海 Gear transmission internal combustion engine
CN204419474U (en) * 2015-02-04 2015-06-24 东北石油大学 A kind of feed water pump
CN107237733A (en) * 2017-07-18 2017-10-10 广州市安途电器有限公司 A kind of novel plastic air pump movement
CN108757385A (en) * 2018-07-13 2018-11-06 李旭东 A kind of on-board inflation systems
CN208169088U (en) * 2018-05-17 2018-11-30 黄石东贝电器股份有限公司 Eccentric crankshaft and compressor
CN209569134U (en) * 2019-01-26 2019-11-01 青岛四维流体设备有限公司 A kind of air supply system air compressor
CN212250377U (en) * 2020-06-04 2020-12-29 绍兴市浩鑫电器有限公司 Core structure of inflator pump

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11294329A (en) * 1998-04-14 1999-10-26 Denso Corp Air compressor
WO2006049268A1 (en) * 2004-11-01 2006-05-11 Hiroshi Morikawa Mutual conversion method between linear/rotational motion of reciprocal engine
CN1779252A (en) * 2004-11-26 2006-05-31 乐金电子(天津)电器有限公司 Transmission device of closed compressor
CN101158316A (en) * 2007-08-19 2008-04-09 张连奎 Non-round annular wheel crankless engines
CN102230423A (en) * 2011-05-23 2011-11-02 舒锦海 Gear transmission internal combustion engine
CN204419474U (en) * 2015-02-04 2015-06-24 东北石油大学 A kind of feed water pump
CN107237733A (en) * 2017-07-18 2017-10-10 广州市安途电器有限公司 A kind of novel plastic air pump movement
CN208169088U (en) * 2018-05-17 2018-11-30 黄石东贝电器股份有限公司 Eccentric crankshaft and compressor
CN108757385A (en) * 2018-07-13 2018-11-06 李旭东 A kind of on-board inflation systems
CN209569134U (en) * 2019-01-26 2019-11-01 青岛四维流体设备有限公司 A kind of air supply system air compressor
CN212250377U (en) * 2020-06-04 2020-12-29 绍兴市浩鑫电器有限公司 Core structure of inflator pump

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