CN111441930A

CN111441930A - DC brushless vacuum pump

Info

Publication number: CN111441930A
Application number: CN202010256786.9A
Authority: CN
Inventors: 谭洪; 刘斌
Original assignee: Yiwu Hongchuan Technology Co ltd
Current assignee: Yiwu Hongchuan Technology Co ltd
Priority date: 2020-04-02
Filing date: 2020-04-02
Publication date: 2020-07-24

Abstract

The invention provides a direct-current brushless vacuum pump which comprises a motor, a box body, a cylinder connecting rod, an eccentric wheel, a cylinder and a cylinder cover, wherein the box body is symmetrically sleeved at two ends of the motor; according to the invention, the air cylinder and the valve plate are integrally formed and connected, the air inlet pipe and the air outlet pipe are integrally formed and connected with the cover body I and the cover body II, the sealing property is improved, the motor and the air cylinder are assembled together through the integrally formed box body provided with the motor fixing seat and the air cylinder fixing seat, the assembly efficiency is improved, the box body, the air cylinder and the air cylinder cover are manufactured through one-step injection molding by adopting modified polyphenyl ether instead of an aluminum profile through a mold, the efficiency is high, the cost is low, the insulation performance, the water resistance and the corrosion resistance are outstanding, the weight is light.

Description

DC brushless vacuum pump

Technical Field

The invention relates to the field of air compressors, in particular to a direct-current brushless vacuum pump.

Background

A DC brushless motor vacuum pump uses a DC brushless motor as power, the circular motion of the motor makes the diaphragm inside the pump do reciprocating motion through a mechanical device, thereby compressing and stretching the air in the pump cavity with fixed volume to form vacuum (negative pressure), generating pressure difference with the outside atmospheric pressure at the pump suction port, and compressing (sucking) the air into the pump cavity and then discharging the air from the exhaust port under the action of the pressure difference.

The DC brushless motor vacuum pump in the prior art has the following problems: 1) the cylinder and the valve plate are independent, the cylinder and the valve plate are sealed by a sealing ring during assembly, and the sealing ring is a quick-wear part and is easy to damage to cause air leakage; 2) the left cylinder cover and the right cylinder cover are connected by metal pipes, and sealing structures are required to be arranged at the joints, so that the assembly is complex and air leakage is easy; 3) the cylinder, the cylinder cover, the box body and the like are cast by adopting aluminum profiles, the manufacturing process is complex, the cost is high, the production efficiency is low, and the defective rate is high; meanwhile, the metal material is heavy in weight and inconvenient to carry.

Disclosure of Invention

The invention provides a direct current brushless vacuum pump aiming at the problems in the background technology, and the direct current brushless vacuum pump has the advantages of good sealing performance, high assembly efficiency, low cost and light weight.

The invention is realized by the following scheme: the utility model provides a direct current brushless vacuum pump, includes motor, box, cylinder connecting rod, eccentric wheel, cylinder and cylinder head, the both ends symmetrical sleeve of motor is equipped with the box, cylinder connecting rod and eccentric wheel symmetry in proper order are in the both ends of motor center pin are close to the outside of box, the box upper end is connected with the cylinder, the cylinder coats there is the cylinder head.

The box body comprises a motor fixing seat and a cylinder fixing seat, the motor fixing seat is a vertical cube, the center of the motor fixing seat is provided with a motor seat hole, the aperture of the motor seat hole is equal to the outer diameter of the motor, the side surface of the motor fixing seat is provided with four first screw holes which are connected with bolts, an air cylinder fixing seat is arranged above the motor fixing seat and is a transverse cube, the center of the cylinder fixing seat is provided with a cylinder seat hole, the aperture of the cylinder seat hole is equal to the outer diameter of the cylinder, the periphery of the cylinder fixing seat is provided with second screw holes, the number of the box bodies is two, the two box bodies are respectively and symmetrically sleeved at two ends of the motor, the motor is stably connected with the box body through the motor fixing seat, the first screw holes and the bolts, and the air cylinder is stably connected with the box body through the air cylinder fixing seat and the second screw holes.

The air cylinder comprises a valve plate, a cylinder body and connecting columns, wherein four connecting columns are arranged on the periphery of the valve plate respectively, the cylinder body is connected to the inner sides of the connecting columns in an encircling mode, the upper end of the air cylinder is connected with the valve plate in an integrated mode, air holes are formed in the middle of the valve plate, the air holes are symmetrically arranged in two groups, each group of the air holes is provided with a plurality of small air holes, the air holes are communicated with the cylinder body and an air cavity in the cylinder cover, one-way valves are arranged in the air holes, leather cups are arranged in the cylinder body and connected with a cylinder connecting rod, a groove is formed in one surface, in contact with.

The cylinder cover comprises a cover body I, a cover body II, an air inlet pipe, an air outlet pipe, an air cavity and an air cavity cover, wherein the cover body I and the cover body II are connected into a whole through the air inlet pipe and the air outlet pipe, the cover body I and the cover body II face the cylinder, the air cavity communicated with the air inlet pipe and the air outlet pipe is respectively arranged on one surface of the cylinder, the cover body I and the cover body II face away from the surface of the cylinder, the air cavity cover is arranged on the surface of the cover body I and the surface of the cover body II, fourth screw holes are formed in the periphery of the cover body I and the periphery of.

Furthermore, the inner diameters of the second screw hole, the third screw hole and the fourth screw hole are the same and are communicated up and down.

Furthermore, the lower end of the box body is provided with a damping foot which is made of rubber.

Further, the motor is a brushless direct current motor.

Furthermore, the box body, the cylinder and the cylinder cover are all formed by one-time injection molding of modified polyphenyl ether through a die.

The invention adopts the following assembly steps:

firstly, respectively sleeving two ends of a motor into motor seat holes of motor fixing seats of two boxes, inserting four bolts into a first screw hole of the motor fixing seat, and screwing two symmetrical boxes through nuts;

secondly, respectively and sequentially installing two cylinder connecting rods and two eccentric wheels into central shafts at two ends of a motor, and connecting a leather cup to the upper ends of the cylinder connecting rods;

thirdly, respectively placing the two cylinders at the upper ends of the two box bodies, wherein the cylinder body extends into a cylinder seat hole of the cylinder fixing seat, placing the one-way valve into the air hole, and placing the rubber sealing ring into the groove;

and fourthly, covering the connected cylinder covers at the upper ends of the two cylinders, aligning the second screw hole, the third screw hole and the fourth screw hole up and down, putting a bolt into the screw hole, screwing the bolt through a nut, and finishing assembly.

Compared with the prior art, the invention has the following beneficial effects:

1) the air cylinder and the valve plate are connected in an integrated mode, the air inlet pipe and the air outlet pipe are connected with the cover body I and the cover body II in an integrated mode, the traditional air cylinder and valve plate split structure and the air cylinder cover and connecting air pipe split structure are changed into an integrated structure, the installation steps are simplified, the assembly efficiency is improved, particularly, the sealing structure between the air cylinder and the valve plate and between the connecting air pipe and the air cylinder cover is omitted, the sealing performance is improved, the possibility of air leakage is eliminated, the air flow is more smooth, and the operation loss is less.

2) The motor and the cylinder can be conveniently assembled together through the integrally formed box body provided with the motor fixing seat and the cylinder fixing seat, the box body is firm and stable, the installation steps are further simplified, and the assembly efficiency is improved.

3) The main parts of the box body, the cylinder and the cylinder cover are manufactured by adopting modified polyphenyl ether to replace aluminum profiles through one-time injection molding of a die, the manufacturing process is simple, the production efficiency is high, the one-time molding quality is good, and the cost is reduced; the strength is high, and the insulating property, the water resistance and the corrosion resistance are outstanding; the product has strong plasticity, the weight is reduced, the miniaturization and the lightweight of the vacuum pump are realized, and the vacuum pump is convenient to carry.

Drawings

Fig. 1 is an overall configuration diagram of a dc brushless vacuum pump.

Fig. 2 is a structural diagram of a direct current brushless vacuum pump box.

Fig. 3 is a front structural view of a cylinder of a dc brushless vacuum pump.

Fig. 4 is a rear structure view of a cylinder of a dc brushless vacuum pump.

Fig. 5 is a front structural view of a cylinder head of a dc brushless vacuum pump.

Fig. 6 is a rear view structural view of a cylinder head of a dc brushless vacuum pump.

In the figure: 1. a motor; 2. a box body; 3. a cylinder connecting rod; 4. an eccentric wheel; 5. a cylinder; 6. a cylinder head; 7. a shock absorption foot; 21. a motor fixing seat; 22. a cylinder fixing seat; 23. a motor seat hole; 24. a first screw hole; 25. a bolt; 26. a cylinder block bore; 27. a second screw hole; 51. a valve plate; 52. a cylinder body; 53. connecting columns; 54. air holes; 55. a one-way valve; 56. a leather cup; 57. a groove; 58. a third screw hole; 61. a first cover body; 62. a second cover body; 63. an air inlet pipe; 64. an air outlet pipe; 65. an air cavity; 66. an air chamber cover; 67. and a fourth screw hole.

Detailed Description

The invention is further illustrated by the following specific examples:

the embodiment, combine figures 1 ~ 6, a direct current brushless vacuum pump, including motor 1, box 2, cylinder connecting rod 3, eccentric wheel 4, cylinder 5 and cylinder head 6, the cover is equipped with box 2 at motor 1 both ends, cylinder connecting rod 3 and eccentric wheel 4 in proper order the symmetric connection be in the both ends of motor 1 center pin and be close to the outside of box 2, box 2 upper end is connected with cylinder 5, the upper end of cylinder 5 covers there is cylinder head 6.

The box body 2 comprises a motor fixing seat 21 and a cylinder fixing seat 22, the motor fixing seat 21 is a vertical cube, a motor seat hole 23 is formed in the center of the motor fixing seat 21, the aperture of the motor seat hole 23 is equal to the outer diameter of the motor 1, first screw holes 24 are formed in the side face of the motor fixing seat 21, four first screw holes 24 are formed, bolts 25 are connected to the first screw holes 24, a cylinder fixing seat 22 is arranged above the motor fixing seat 21, the cylinder fixing seat 22 is a transverse cube, a cylinder seat hole 26 is formed in the center of the cylinder fixing seat 22, the aperture of the cylinder seat hole 26 is equal to the outer diameter of the cylinder 5, second screw holes 27 are formed in the periphery of the cylinder fixing seat 22, the two box bodies 2 are respectively and symmetrically sleeved at the two ends of the motor 1, and the motor 1 is stably connected with the box body 2 through the motor fixing seat 21, the cylinder 3 is firmly connected with the box body 2 through the cylinder fixing seat 22 and the second screw hole 27.

The cylinder 5 includes valve plate 51, cylinder body 52, spliced pole 53, valve plate 51 is equipped with four spliced poles 53 all around respectively, spliced pole 53 inboard is surroundingly connected with cylinder body 52, cylinder 52 upper end with valve plate 51 body coupling, be equipped with gas pocket 54 in the middle of the valve plate 51, gas pocket 54 symmetry is equipped with two sets ofly, and every group is equipped with a plurality of little gas pockets, gas pocket 54 link up with air cavity 65 in cylinder body 52 and the cylinder head 6, be equipped with check valve 55 in the gas pocket 54, be equipped with leather cup 56 in the cylinder body 52, leather cup 56 is connected with cylinder connecting rod 3, the one side of valve plate 51 and the contact of cylinder head 6 is equipped with recess 57, be equipped with rubber seal in the recess 57, spliced pole 53 center is equipped with third screw.

The cylinder cover 6 comprises a first cover body 61, a second cover body 62, an air inlet pipe 63, an air outlet pipe 64, an air cavity 65 and an air cavity cover 66, the first cover body 61 and the second cover body 62 are connected into a whole through the air inlet pipe 63 and the air outlet pipe 64, the air cavity 65 communicated with the air inlet pipe 63 and the air outlet pipe 64 is respectively arranged on one surface, facing the cylinder 5, of the first cover body 61 and the second cover body 62, the air cavity cover 66 is arranged on the surface, facing away from the cylinder 5, of the first cover body 61 and the second cover body 62, fourth screw holes 67 are formed in the periphery of the first cover body 61 and the second cover body 62, and the first cover body 6 and the cylinder 5 are fixed through the third screw holes.

The second screw hole 27, the third screw hole 58 and the fourth screw hole 67 have the same inner diameter and are vertically through.

The lower end of the box body 2 is provided with a damping foot 7, and the damping foot 7 is made of rubber.

The motor 1 is a brushless dc motor.

The box body 2, the cylinder 5 and the cylinder cover 6 are all formed by one-time injection molding of modified polyphenyl ether through a die.

The assembly steps of the invention are as follows:

firstly, respectively sleeving two ends of a motor 1 into motor seat holes 23 of motor fixing seats 21 of two box bodies 2, inserting four bolts 25 into first screw holes 24 of the motor fixing seats 21, and screwing two symmetrical box bodies 2 through nuts, so that the motor 1 and the box bodies 2 are assembled;

secondly, two cylinder connecting rods 3 and two eccentric wheels 4 are respectively and sequentially arranged in central shafts at two ends of the motor 1, and a leather cup 56 is connected to the upper end of the cylinder connecting rod 3;

thirdly, the two cylinders 5 are respectively placed at the upper ends of the two box bodies 2, wherein the cylinder body 52 extends into the cylinder seat hole 26 of the cylinder seat 22, the one-way valve 55 is placed into the air hole 54, and the rubber sealing ring is placed into the groove 57;

and fourthly, covering the connected cylinder covers 6 at the upper ends of the two cylinders 5, aligning the second screw holes 27, the third screw holes 58 and the fourth screw holes 67 up and down, putting bolts into the screw holes, screwing the bolts through nuts, and finishing assembly.

2) The motor and the cylinder can be conveniently assembled together through the integrally formed box body provided with the motor fixing seat and the cylinder fixing seat, the motor and the cylinder are firm and stable, the installation steps are simplified, and the assembly efficiency is improved.

3) The main parts of the box body, the cylinder and the cylinder cover are all formed by one-time injection molding of modified polyphenyl ether through a die, and the polyphenyl ether has excellent comprehensive performance, excellent dimensional stability and outstanding electrical insulation under long-term load, excellent water resistance and corrosion resistance, higher tensile strength and impact strength and good creep resistance; the modified polyphenyl ether is adopted to replace aluminum profiles to manufacture the box body, the cylinder and the cylinder cover, the manufacturing process is simplified, the cost is reduced, the product plasticity is strong, the strength is high, the insulativity is good, the weight is reduced, the miniaturization and the light weight of the vacuum pump are realized, and the carrying is convenient.

Although the present invention has been described with reference to preferred embodiments, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and various changes in form and details may be made within the scope of the appended claims.

Claims

1. A direct-current brushless vacuum pump is characterized by comprising a motor (1), a box body (2), a cylinder connecting rod (3), an eccentric wheel (4), a cylinder (5) and a cylinder cover (6), wherein the box body (2) is symmetrically sleeved at two ends of the motor (1), the cylinder connecting rod (3) and the eccentric wheel (4) are sequentially and symmetrically connected to two ends of a central shaft of the motor (1) and are close to the outer side of the box body (2), the cylinder (5) is connected to the upper end of the box body (2), and the cylinder cover (6) covers the upper end of the cylinder (5);

the box body (2) comprises a motor fixing seat (21) and a cylinder fixing seat (22), the motor fixing seat (21) is a vertical square body, a motor seat hole (23) is formed in the center of the motor fixing seat (21), the aperture of the motor seat hole (23) is equal to the outer diameter of the motor (1), first screw holes (24) are formed in the side face of the motor fixing seat (21), four first screw holes (24) are formed, bolts (25) are connected to the first screw holes (24), a cylinder fixing seat (22) is arranged above the motor fixing seat (21), the cylinder fixing seat (22) is a transverse square body, a cylinder seat hole (26) is formed in the center of the cylinder fixing seat (22), the aperture of the cylinder seat hole (26) is equal to the outer diameter of the cylinder (5), and second screw holes (27) are formed in the periphery of the cylinder fixing seat (22);

the air cylinder (5) comprises a valve plate (51), a cylinder body (52) and connecting columns (53), four connecting columns (53) are arranged on the periphery of the valve plate (51) respectively, the inner sides of the connecting columns (53) are connected with the cylinder body (52) in an encircling manner, the upper end of the air cylinder (52) is integrally connected with the valve plate (51), air holes (54) are formed in the middle of the valve plate (51), the air holes (54) are symmetrically provided with two groups, each group is provided with a plurality of small air holes, the air holes (54) are communicated with the cylinder body (52) and an air cavity (65) in the air cylinder cover (6), one-way valves (55) are arranged in the air holes (54), leather cups (56) are arranged in the cylinder body (52), the leather cups (56) are connected with air cylinder connecting rods (3), a groove (57) is formed in one surface of the valve plate (51), a third screw hole (58) is formed in the center of the connecting column (53);

the cylinder cover (6) comprises a first cover body (61), a second cover body (62), an air inlet pipe (63), an air outlet pipe (64), an air cavity (65) and an air cavity cover (66), the first cover body (61) and the second cover body (62) are connected into a whole through the air inlet pipe (63) and the air outlet pipe (64), the air cavity (65) communicated with the air inlet pipe (63) and the air outlet pipe (64) are respectively arranged on one surface of the first cover body (61) and the second cover body (62) facing the air cylinder (5), the air cavity cover (66) is arranged on the surface, facing away from the air cylinder (5), of the first cover body (61) and the second cover body (62), and fourth screw holes (67) are formed in the periphery of the first cover body (61) and the second.

2. A dc brushless vacuum pump as claimed in claim 1, wherein: the second screw hole (27), the third screw hole (58) and the fourth screw hole (67) have the same inner diameter and are communicated up and down.

3. A dc brushless vacuum pump as claimed in claim 1, wherein: the shock absorption box is characterized in that a shock absorption foot (7) is arranged at the lower end of the box body (2), and the shock absorption foot (7) is made of rubber.

4. A dc brushless vacuum pump as claimed in claim 1, wherein: the motor (1) is a direct current brushless motor.

5. A dc brushless vacuum pump as claimed in claim 1, wherein: the box body (2), the cylinder (5) and the cylinder cover (6) are formed by one-time injection molding of modified polyphenyl ether through a die.