Miniaturized air compressor

Abstract

The present invention provides a miniaturized air compressor, wherein rotating shafts at both ends of a motor extend out of a fixing portion of a bracket, and a cylinder is fixed between a valve plate and a supporting portion of the bracket, wherein a through hole for avoiding movement of a connecting rod is provided in the middle of the supporting portion, and a notch communicating with the through hole is provided on a side of the supporting portion away from the motor, threaded holes are provided at four corners of the top of the supporting portion of the bracket, and connecting columns are extended at four corners of the bottom of the valve plate, wherein the connecting rod, the crank and the bearing can be connected first, and the connecting ring of the connecting rod can form a stable interference connection with the bearing by extrusion, and then can be directly passed through the notch to be connected with the rotating shaft of the motor without interfering with the bracket, the installation is convenient, and the structure is simple and compact.

Description

Technical Field

[0001] The invention relates to the field of air compressors, and in particular to a miniaturized air compressor. Background Art

[0002] An air compressor is a device that compresses gas by pressurizing it. The structural stability of the air compressor after installation is very important. In order to ensure the structural stability of the air compressor after installation, the air compressor in the prior art is generally designed to be more complicated, making it inconvenient to install the components, and also making it difficult to further reduce the volume of the air compressor with a set displacement.

[0003] Therefore, it is necessary to provide a miniaturized air compressor to solve the above technical problems. Summary of the invention

[0004] The present invention provides a miniaturized air compressor, which can first connect a connecting rod, a crank and a bearing, and the connecting ring of the connecting rod can form a stable interference connection with the bearing by extrusion, and then can directly pass through a notch to connect with the rotating shaft of a motor without interfering with a bracket, so as to solve the problems of the air compressor in the prior art that the structure is relatively complex, the installation of various components is difficult and the connection is not stable enough.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a miniaturized air compressor, comprising:

[0006] Two brackets, each bracket comprising a fixing portion and a supporting portion arranged on top of the fixing portion;

[0007] A motor is fixed between the two fixing parts, and two rotating shafts are respectively provided at both ends of the motor and extend out of the fixing parts;

[0008] Two cylinders are respectively arranged on the two supporting parts;

[0009] Two pistons are slidably disposed in the two cylinders respectively;

[0010] Two valve plates, the valve plates are located at the top of the cylinder, and are provided with an inlet valve hole and an outlet valve hole for ventilation, and an inlet valve sheet and an outlet valve sheet for correspondingly controlling ventilation of the inlet valve hole and the outlet valve hole;

[0011] Two cylinder heads are connected to the two valve plates respectively, and one cylinder head is provided with an air inlet cavity corresponding to the air inlet valve hole and an air outlet cavity corresponding to the air outlet valve hole;

[0012] A crank, comprising a connecting hole and a connecting boss, wherein the connecting hole is arranged through the connecting boss, the center of the connecting hole and the center of the connecting boss are staggered, and the two cranks are fixedly connected to the rotating shafts at both ends of the motor through the connecting holes respectively; and

[0013] A connecting rod comprises a connecting plate and a connecting ring respectively located at two ends, the connecting ring is connected to the connecting boss through a bearing, and the connecting plate is fixedly connected to the piston.

[0014] In the present invention, a through hole for avoiding movement of the connecting rod is provided in the middle of the support part, a notch connected to the through hole for avoiding movement is provided on the side of the support part away from the motor, connecting columns are extended at the four corners of the bottom of the valve plate, threaded holes for screw connection are provided at the four corners of the top of the support part, through holes for screw connection are provided at the four corners of the cylinder head and on the connecting columns, and the screws pass through the through holes and are threadedly connected with the threaded holes to fix the cylinder head, the valve plate and the support part.

[0015] The cylinder is fixedly arranged between the support part and the valve plate, a first positioning groove corresponding to the cylinder is arranged on the support part, a second positioning groove corresponding to the cylinder is arranged on the valve plate, a positioning protrusion for positioning contact with the inner wall of the cylinder is arranged in the second positioning groove, and a positioning reinforcement part for positioning contact with the outer wall of the cylinder is arranged on the connecting column.

[0016] Furthermore, reinforcement parts for reinforcing the strength of the threaded hole are arranged at the four corners of the top of the support part and the outer side of the support part.

[0017] Furthermore, the outer ring of the bearing is interference-connected in the connecting ring, and the connecting boss is interference-connected in the inner ring of the bearing.

[0018] In the present invention, the air inlet cavities of the two cylinder heads are connected through an air pipe, and the air outlet cavities of the two cylinder heads are connected through an air pipe, one of the cylinder heads is provided with an air inlet connected to the air inlet cavity, and the other cylinder head is provided with an air outlet connected to the air outlet cavity;

[0019] A first fixing hole for screw connection is provided on the outlet valve plate, a threaded hole for screw connection is provided on the top of the valve plate, a first sealing member is provided between the outlet valve plate and the valve plate, and a first positioning groove corresponding to the first sealing member is provided on the valve plate;

[0020] A second fixing hole for screw connection is arranged on the intake valve plate, a threaded hole for screw connection is arranged at the bottom of the valve plate, a second sealing member is arranged between the intake valve plate and the valve plate, and a second positioning groove corresponding to the second sealing member is arranged on the valve plate.

[0021] Further, the first sealing member is bonded and fixed to the outlet valve plate, the second sealing member is bonded and fixed to the inlet valve plate, the inner and outer side surfaces of the first sealing member are inclined to facilitate fitting into the first positioning groove, and the inner and outer side surfaces of the second sealing member are inclined to facilitate fitting into the second positioning groove;

[0022] The first sealing member is provided with a first extension portion, the first extension portion is located on a side of the first sealing member away from the first fixing hole, and in the process of the outlet valve sheet being away from the valve plate to discharge gas, the first extension portion is always located in the first positioning groove;

[0023] The second sealing member is provided with a second extension portion, which is located on a side of the second sealing member away from the second fixing hole. When the intake valve sheet is away from the valve plate for intake, the second extension portion is always located in the second positioning recess.

[0024] Wherein, the piston comprises a rubber ring and a piston pressure plate, a connecting groove corresponding to the piston pressure plate is arranged on the connecting plate, a threaded hole and a positioning boss are arranged at the bottom of the connecting groove, a through hole corresponding to the threaded hole and a positioning blind hole corresponding to the positioning boss are arranged on the piston pressure plate, and the rubber ring is pressed and fixed in the connecting groove through the piston pressure plate;

[0025] A blind hole for avoiding the screws on the intake valve plate is also arranged on the top of the piston pressure plate.

[0026] In the present invention, a plurality of fixing hooks for mounting the miniaturized air compressor are arranged on the fixing parts of the two brackets, the fixing hooks at the top and bottom of the fixing parts are arranged in opposite directions, and the plurality of fixing hooks are of the same size.

[0027] Furthermore, one fixing hook is rotatably provided at each of the four top corners of the top of the fixing part, two fixing hooks are fixedly provided at each of the four top corners of the bottom of the fixing part, and the two fixing hooks at one top corner of the bottom of the fixing part are respectively fixedly provided on the adjacent two side surfaces of the fixing part.

[0028] In the present invention, the crank also includes an eccentric weight, the center of gravity of the eccentric weight, the center of the connecting boss and the center of the connecting hole are located on the same straight line, the center of gravity of the eccentric weight and the center of the connecting boss are respectively located on both sides of the center of the connecting hole, the distance between the center of gravity of the eccentric weight and the center of the connecting hole is greater than the distance between the center of the connecting boss and the center of the connecting hole, and the rotation strokes of the two cranks differ by 180°.

[0029] Compared with the prior art, the present invention has the following beneficial effects: the rotating shafts at both ends of the motor of the miniaturized air compressor of the present invention extend beyond the fixing part of the bracket, the cylinder is fixed between the valve plate and the supporting part of the bracket, wherein a through hole for avoiding the movement of the connecting rod is provided in the middle of the supporting part, and a notch connected to the through hole for avoiding the movement is provided on the side of the supporting part away from the motor, which is very convenient for installing the connecting rod;

[0030] The outer ring of the bearing is interference-connected in the connecting ring, and the connecting boss is interference-connected in the inner ring of the bearing, thereby ensuring the stability of the connection between the connecting rod, the bearing and the crank.

[0031] In addition, fixing hooks are provided on the fixing parts of the two brackets. The fixing hooks are located at the four corners of the four sides of the overall structure formed by connecting the two brackets and the motor. The fixing hooks at the top and bottom of the fixing part are arranged in opposite directions. The miniaturized air compressor can be fixed and installed through elastic connecting parts, so that the entire air compressor is suspended to reduce vibration and noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only drawings corresponding to some embodiments of the present invention.

[0033] Figure 1 It is a structural schematic diagram of a preferred embodiment of the miniaturized air compressor of the present invention.

[0034] Figure 2 It is an exploded view of a preferred embodiment of the miniaturized air compressor of the present invention.

[0035] Figure 3 It is a schematic structural diagram of the support of the miniaturized air compressor of the present invention.

[0036] Figure 4 It is a schematic structural diagram of the valve plate, the air inlet valve plate and the air outlet valve plate of the miniaturized air compressor of the present invention.

[0037] Figure 5 for Figure 4 A schematic structural diagram of the valve plate from another perspective.

[0038] Figure 6 It is a schematic structural diagram of the air outlet valve plate and the first sealing member of the miniaturized air compressor of the present invention.

[0039] Figure 7 For along Figure 6 Sectional view made along the AA cutting line in .

[0040] Figure 8 It is a schematic structural diagram of the connecting rod and piston of the miniaturized air compressor of the present invention.

[0041] Fig. 9 It is a schematic structural diagram of the crank of the miniaturized air compressor of the present invention.

[0042] Fig.10 It is a structural schematic diagram of another perspective of the crank of the miniaturized air compressor of the present invention.

[0043] Fig.11 It is a schematic diagram of the air inlet and outlet systems of two cylinder heads of the miniaturized air compressor of the present invention. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0045] In order to ensure the structural stability of the air compressor after installation, the air compressor in the prior art is generally designed to be more complicated, which makes it inconvenient to install the various components and also makes it difficult to further reduce the volume of the air compressor with a set displacement.

[0046] The following is a preferred embodiment of a miniaturized air compressor provided by the present invention that can solve the above technical problems.

[0047] Please refer to Figure 1 and Figure 2 ,in Figure 1 Schematic diagram of the structure of a preferred embodiment of a miniaturized air compressor of the present invention. Figure 2 It is an exploded view of a preferred embodiment of the miniaturized air compressor of the present invention.

[0048] In the figures, structurally similar elements are denoted by the same reference numerals.

[0049] The preferred embodiment of the miniaturized air compressor provided by the present invention is: a miniaturized air compressor, which includes a bracket 11, a motor 12, a cylinder 17, a piston 18, a valve plate 15, a cylinder head 16, a crank 14, a bearing 19 and a connecting rod 13;

[0050] The bracket 11 includes a fixing portion 21 and a supporting portion 22 disposed on the top of the fixing portion 21;

[0051] The motor 12 is fixed between the fixing parts 21 of the two brackets 11, and two rotating shafts 121 extending out of the fixing parts 21 are respectively provided at both ends of the motor 12;

[0052] The two cylinders 17 are respectively arranged on the two supporting parts 22;

[0053] Two pistons 18 are slidably disposed in two cylinders 17 respectively;

[0054] The valve plate 15 is located at the top of the cylinder 17, a sealing ring 171 is arranged between the cylinder 17 and the valve plate 15, and an inlet valve hole 34 and an outlet valve hole 36 for ventilation are arranged on the valve plate 15, as well as an inlet valve plate 31 and an outlet valve plate 32 for correspondingly controlling the ventilation of the inlet valve hole 34 and the outlet valve hole 36;

[0055] The two cylinder heads 16 are connected to the two valve plates 15 respectively. An air inlet cavity corresponding to the air inlet valve hole 34 and an air outlet cavity corresponding to the air outlet valve hole 36 are provided in the cylinder heads 16. The air inlet cavities of the two cylinder heads 16 are connected through an air pipe 1B. The air outlet cavities of the two cylinder heads 16 are connected through an air pipe 1B. A sealing ring 1B1 is provided between the cylinder heads 16 and the air pipe 1B. An air inlet connected to the air inlet cavity is provided on one of the cylinder heads 16, and an air outlet connected to the air outlet cavity is provided on the other cylinder head 16.

[0056] The crank 14 includes a connecting hole 52 and a connecting boss 51. The connecting hole 52 is arranged through the connecting boss 51. The center of the connecting hole 52 and the center of the connecting boss 51 are staggered. The two cranks 14 are fixedly connected to the rotating shafts 121 at both ends of the motor 12 through the connecting holes 52 respectively.

[0057] The inner ring of the bearing 19 is sleeved on the connecting boss 51, and the connecting boss 51 is connected to the inner ring of the bearing 19 by extrusion interference fit;

[0058] The connecting rod 13 includes a connecting plate 42 and a connecting ring 41 respectively located at both ends. The connecting ring 41 is sleeved on the outer ring of the bearing 19. The bearing 19 is connected in the connecting ring 41 by extrusion interference. The connecting plate 42 is fixedly connected to the piston 18.

[0059] In the present invention, a through hole 24 for avoiding movement of the connecting rod 13 is provided in the middle of the support portion 22, a notch 26 connected to the through hole 24 is provided on the side of the support portion 22 away from the motor 12, and the notch 26 is convenient for installing the connecting rod 13, connecting columns 33 are extended at the four corners of the bottom of the valve plate 15, threaded holes 23 for connecting with screws 1C are provided at the four corners of the top of the support portion 22, through holes for connecting with screws 1C are provided at the four corners of the cylinder head 16 and on the connecting column 33, and the cylinder head 16, the connecting column 33 and the valve plate 15 are fixedly connected by screws 1C;

[0060] Furthermore, reinforcing parts 221 for reinforcing the strength of the threaded hole 23 are provided at the four corners of the top of the supporting part 22 and the outer side of the supporting part 22;

[0061] When the motor 12 is fixedly connected to the bracket 11, the crank 14, the bearing 19 and the connecting rod 13 are connected as a whole, and then the whole formed by the crank 14, the bearing 19 and the connecting rod 13 is connected to the rotating shaft 121 of the motor 12;

[0062] When the distance from the center line of the connecting hole 52 of the crank 14 to the side of the connecting plate 42 close to the connecting ring 41 is greater than the distance from the top surface of the support portion 22 to the axis of the rotating shaft 121 of the motor 12, the crank 14, the bearing 19 and the connecting rod 13 connected as a whole can directly pass through the notch 26 on the bracket 11 and connect to the rotating shaft 121 without interfering with the bracket 11.

[0063] The miniaturized air compressor of the present invention has the advantages of simple and compact structure, convenient installation, stable connection and high working efficiency.

[0064] Please refer to Figure 3 ,in Figure 3 It is a schematic structural diagram of the support of the miniaturized air compressor of the present invention.

[0065] Many household appliances require air blowing. Some household appliances are equipped with air compressors for air blowing. The air compressors are generally directly fixed on the bottom plate inside the household appliances. The air compressors are fixed on the bottom plate inside the household appliances, which will generate large noise due to working vibration.

[0066] Since consumers have higher and higher requirements for the quietness of household appliances, in this preferred embodiment, in order to further reduce the working noise, a plurality of fixing hooks for mounting the miniaturized air compressor are fixedly arranged on the fixing parts 21 of the two brackets 11, and the entire air compressor is suspended and fixedly placed through an external elastic connecting piece to reduce vibration noise;

[0067] Among them, a plurality of fixing hooks are respectively located at the four corners of the four sides of the overall structure formed by connecting the two brackets 11 and the motor 12;

[0068] The fixing hooks at the top and bottom of the fixing part 21 are arranged in opposite directions, and the sizes of the fixing hooks are the same. The fixing hooks 271 at the upper part of the fixing part 21 are pulled upward by the multiple external elastic connectors, and the fixing hooks 27 at the lower part of the fixing part 21 are pulled downward by the multiple external elastic connectors, so that the miniaturized air compressor is pulled and fixed from multiple different directions on four sides, so that the entire air compressor is suspended, thereby reducing vibration noise;

[0069] In addition, the consistent sizes of the multiple fixing hooks in the preferred embodiment can ensure that the fixing hooks can meet the pulling strength requirements when the miniaturized air compressor is in any installation orientation, and the installation setting is more adjustable.

[0070] Preferably, a fixing hook 271 is rotatably provided at each of the four top corners of the top of the fixing portion 21, two fixing hooks 27 are fixedly provided at each of the four top corners of the bottom of the fixing portion, and the two fixing hooks 27 at one top corner of the bottom of the fixing portion are respectively fixedly provided on the adjacent two side surfaces of the fixing portion 21;

[0071] When the connection position corresponding to the elastic connector inside the household appliance does not correspond to the connection orientation of the fixing hook on the air compressor, the tension during connection can automatically adjust the orientation of the fixing hook 271 at the top of the fixing part 21, so that the elastic connector can better and more stably connect the fixing hook and the connection point inside the household appliance.

[0072] The two brackets 11 are symmetrically arranged on both sides of the motor 12, and fixing protrusions 29 for fixing the motor 12 are arranged at the four corners on the opposite sides of the two fixing parts 21, and through holes for bolt 1D connection are arranged on the fixing protrusions 29, and fixing reinforcement parts 28 for strengthening the fixation of the motor 12 are arranged on the four sides on the opposite sides of the two fixing parts 21, and four weight-reducing holes 211 are arranged in annular sections around the rotating shaft 121 of the motor 12 on the two fixing parts 21, and a plurality of heat sinks 161 are arranged on the top of the cylinder head 16.

[0073] Please refer to Fig. 9 and Fig.10 ,in Fig. 9 It is a structural schematic diagram of the crank of the miniaturized air compressor of the present invention, Fig.10 It is a structural schematic diagram of another perspective of the crank of the miniaturized air compressor of the present invention.

[0074] In the present invention, the crank 14 also includes an eccentric weight 53, the center of gravity of the eccentric weight 53, the center of the connecting hole 52 and the center of the connecting boss 51 are located on the same straight line, the center of gravity of the eccentric weight 53 and the center of the connecting boss 51 are respectively located on both sides of the center of the connecting hole 52, and the corresponding relationship between the center of gravity of the eccentric weight 53 and the center of the connecting boss 51 can make the force at the connecting hole 52 more balanced, thereby reducing the wear of the bearing 19.

[0075] The distance between the center of gravity of the eccentric weight 53 and the center of the connecting hole 52 is greater than the distance between the center of the connecting boss 51 and the center of the connecting hole 52, so that the lighter eccentric weight 53 can better balance the force applied to the connecting boss 51 by the connecting rod 13.

[0076] At the same time, the rotation strokes of the two cranks 14 in the present invention differ by 180°, and the eccentric weights 53 on the cranks 14 at both ends of the motor 12 are symmetrically distributed with the center of the motor 12 as the symmetry center. The motor 12 cooperates with the two symmetrically distributed eccentric weights 53 to make the rotation more balanced;

[0077] In addition, a threaded hole 54 is provided on the crank 14 , and when the screw 141 is screwed into the threaded hole 54 , a more stable connection can be formed between the crank 14 and the rotating shaft 121 of the motor 12 .

[0078] Please refer to Figure 4 , Figure 5 as well as Figure 8 ,in Figure 4 It is a structural schematic diagram of the valve plate, the air inlet valve plate and the air outlet valve plate of the miniaturized air compressor of the present invention. Figure 5 for Figure 4 A schematic diagram of the structure of the valve plate from another perspective, Figure 8 It is a schematic structural diagram of the connecting rod and piston of the miniaturized air compressor of the present invention.

[0079] A first positioning groove 25 corresponding to the cylinder 17 is provided on the support portion 22, a second positioning groove 3B corresponding to the cylinder 17 is provided on the valve plate 15, a positioning protrusion 3C for positioning contact with the inner wall of the cylinder 17 is provided in the second positioning groove 3B, and a positioning reinforcement portion 331 for positioning contact with the outer wall of the cylinder 17 is provided on the connecting column 33.

[0080] The piston 18 includes a rubber ring 43 and a piston pressure plate 44. A connecting groove 421 corresponding to the piston pressure plate 44 is provided on the connecting plate 42. A threaded hole 422 and a positioning boss 423 are provided at the bottom of the connecting groove 421. A through hole 45 corresponding to the threaded hole 422 and a positioning blind hole corresponding to the positioning boss 423 are provided on the piston pressure plate 44 (in the Figure 8From the perspective of the positioning blind hole, the bottom of the piston pressure plate 44 is located. The surface area of ​​the piston pressure plate 44 is smaller than the surface area of ​​the connecting groove 421. The outer ring area of ​​the rubber ring 43 is larger than the surface area of ​​the connecting plate 42. The inner ring area of ​​the rubber ring 43 is smaller than the surface area of ​​the piston pressure plate 44. The rubber ring 43 is fixed in the connecting groove 421 through the piston pressure plate 44. The piston pressure plate 44 is fixedly connected to the connecting groove 421 through the screws 47. At the same time, the rubber ring 43 is also fixed between the piston pressure plate 44 and the connecting plate 42.

[0081] At the same time, a blind hole 46 for avoiding the screws 3A on the intake valve plate 31 is also provided on the top of the piston pressure plate 44, so that the piston 18 can move to contact the valve plate 15 without being interfered by the screws 3A on the valve plate, which can further increase the movable space of the piston 18 in the cylinder 17.

[0082] In the present invention, a first fixing hole 321 for connection with a screw 3A is provided on the outlet valve plate 32, a threaded hole 37 for connection with a screw 3A is provided on the top of the valve plate 15, a first sealing member is provided between the outlet valve plate 32 and the valve plate 15, and a first positioning groove 38 corresponding to the first sealing member is provided on the valve plate 15;

[0083] A second fixing hole 311 for connection with a screw 3A is provided on the intake valve plate 31, a threaded hole 35 for connection with a screw 3A is provided at the bottom of the valve plate 15, a second sealing member is provided between the intake valve plate 31 and the valve plate 15, and a second positioning groove 3D corresponding to the second sealing member is provided on the valve plate 15.

[0084] The first sealing member can ensure the sealing stability when the inlet valve plate 31 closes the inlet valve hole 34, and the second sealing member can ensure the sealing stability when the outlet valve plate 32 closes the outlet valve hole 36;

[0085] Please refer to Figure 6 and Figure 7 ,in Figure 6 It is a schematic structural diagram of the air outlet valve plate and the first sealing member of the miniaturized air compressor of the present invention. Figure 7 For along Figure 6 Section view made by the AA cutting line in

[0086] The connection structure between the second sealing member and the inlet valve plate 31 is consistent with the connection structure between the first sealing member 322 and the outlet valve plate 32, which can also be referred to in Figure 6 and Figure 7 ;

[0087] In this preferred embodiment, the first sealing member 322 is bonded and fixed to the outlet valve plate 32, and the second sealing member is bonded and fixed to the inlet valve plate. The inner and outer side surfaces of the first sealing member 322 are inclined to facilitate fitting into the first positioning groove 38, and the inner and outer side surfaces of the second sealing member are inclined to facilitate fitting into the second positioning groove;

[0088] The first sealing member 322 is provided with a first extension portion 323, which is located on a side of the first sealing member 322 away from the first fixing hole 321. When the outlet valve plate 32 is away from the valve plate 15 to discharge gas, the first extension portion 323 is always located in the first positioning groove 38;

[0089] The second sealing member is provided with a second extension portion, which is located on a side of the second sealing member away from the second fixing hole. When the intake valve sheet is away from the valve plate for intake, the second extension portion is always located in the second positioning groove 3D.

[0090] The first extension portion 323 enables the outlet valve plate 32 to move toward the valve plate 15 to seal the outlet valve hole 36, and the first sealing member 322 can be quickly and smoothly sealed into the first positioning groove 38;

[0091] The second extended portion enables the intake valve sheet 31 to move toward the valve plate 15 to seal the intake valve hole 34 , and the second sealing member can be quickly and smoothly sealed and fitted into the second positioning groove 3D.

[0092] In addition, a gasket 1A is provided between the cylinder head 16 and the valve plate 15 , and a fixing groove 39 corresponding to the gasket 1A is provided on the top of the valve plate 15 .

[0093] Please refer to Fig.11 ,in Fig.11 It is a schematic diagram of the air inlet and outlet systems of two cylinder heads of the miniaturized air compressor of the present invention.

[0094] Then combine Fig.11 The air inlet and outlet systems of the miniaturized air compressor are described below.

[0095] A cylinder head includes an air inlet cavity 62 and an air outlet cavity 61, an air outlet valve hole 67 is provided on a valve plate at the bottom of the air inlet cavity 62, an air outlet valve hole 67 is provided on a valve plate at the bottom of the air outlet cavity 61, and an air outlet 65 is also provided on one side of the air outlet cavity 61;

[0096] Another cylinder head includes an air inlet cavity 64 and an air outlet cavity 63. An air inlet valve hole 6A is provided on a valve plate at the bottom of the air inlet cavity 64, an air outlet valve hole 69 is provided on a valve plate at the bottom of the air outlet cavity 63, and an air inlet port 66 is also provided on one side of the air outlet cavity 63;

[0097] It should also be understood that it has been described above that the top of the valve plate is provided with an outlet valve sheet corresponding to the outlet valve hole, and the bottom of the valve plate is provided with an inlet valve sheet corresponding to the inlet valve hole;

[0098] The air inlet chamber 62 of one cylinder head is connected to the air inlet chamber 64 of the other cylinder head through the air pipe 1B, and the air outlet chamber 61 of one cylinder head is connected to the air outlet chamber 63 of the other cylinder head through the air pipe 1B.

[0099] Reference Fig.11 In the left and right directions of the view, when the left connecting rod pushes the piston to move in the direction close to the valve plate, the outlet valve hole 67 discharges gas, and the inlet valve hole 68 is blocked and closed by the inlet valve plate, so that the gas in the left cylinder is discharged from the outlet port 65. The movement strokes of the connecting rods on the left and right sides differ by 180°. At this time, when the right connecting rod pushes the piston to move in the direction away from the valve plate, the outlet valve hole 69 is blocked and closed by the outlet valve plate, and the inlet valve hole 6A takes in gas, and the right cylinder begins to store gas from the inlet port 66.

[0100] Then the left and right connecting rods change their strokes. The left connecting rod pushes the piston to move away from the valve plate, and the outlet valve hole 67 is blocked and closed by the outlet valve plate. Air is taken in by the inlet valve hole 68, and the left cylinder takes in stored gas through the inlet port 66 and the air pipe 1B. The movement strokes of the connecting rods on the left and right sides differ by 180°. At this time, the right connecting rod pushes the piston to move toward the valve plate, and the outlet valve hole 69 discharges gas. The inlet valve hole 6A is blocked and closed by the inlet valve plate, and the right cylinder discharges the gas stored in the previous stroke from the outlet port 65.

[0101] The miniaturized air compressor performs air inlet and outlet work in a cycle according to the air inlet and outlet working principle.

[0102] The working principle of the present invention is as follows: firstly, the motor 12 is placed between the two brackets 11 and fixed by screws 1D;

[0103] Then, the bearing 19 is first connected to the connecting ring 41 by means of extrusion interference, and at this time, the extrusion force can be applied to the outer ring of the bearing 19 more conveniently. Then, the connecting boss 51 is connected to the inner ring of the bearing 19 by means of extrusion interference, and at this time, the extrusion force can be applied to the inner ring of the bearing more conveniently, so that the crank 14, the connecting rod 13 and the bearing 19 can be connected firmly.

[0104] After the crank 14, the connecting rod 13 and the bearing 19 are connected, the crank 14 is rotated to adjust the distance from the center line of the connecting hole 52 of the crank 14 to the side of the connecting plate 42 close to the connecting ring 41 to the maximum. Specifically, the eccentric weight 53 on the crank 14 is rotated to the farthest from the connecting plate 42, and the whole connected by the crank 14, the bearing 19 and the connecting rod 13 is directly passed through the notch 26 on the bracket 11, and then the connecting hole 52 on the crank 14 is connected to the rotating shaft 121, and then the screw 141 is screwed in;

[0105] Since the rotation strokes of the two cranks 14 in the present invention differ by 180°, the installed crank 14 needs to be rotated 180° so that when the eccentric weight 53 on the crank 14 at the other end rotates to the farthest from the connecting plate 42, the connecting hole 52 of the crank 14 is just aligned and connected with the rotating shaft 121 of the motor 12;

[0106] Afterwards, the cylinder 17 is placed on the bracket 11, and the piston pressure plate 44 and the rubber ring 43 are taken out, and the rubber ring 43 is stably pressed and fixed between the piston pressure plate 44 and the connecting plate 42 by positioning the positioning boss 423 and fixing the screw 47;

[0107] Connect the inlet valve plate 31 and the outlet valve plate 32 to the valve plate 15 by means of screws 3A, and ensure that the first seal and the first positioning groove 38 are positioned and connected, and the second seal and the second positioning groove 3D are positioned and connected;

[0108] Finally, take the valve plate 15 with the intake valve plate 31 and the outlet valve plate 32 installed, the sealing ring 171, the sealing gasket 1A and the cylinder head 16 and press Figure 1 and Figure 2 The cylinder head 16, the valve plate 15 and the support portion 22 of the bracket 11 are fixedly connected by screws 1C. During installation, attention should also be paid to the positioning and matching between the cylinder 17 and the first positioning groove 25 of the support portion 22 and the second positioning groove 3B on the valve plate 15;

[0109] In addition, it should be noted that the two cylinder heads 16 should be connected correspondingly via the air pipe 1B first, and then the two cylinder heads 16 should be connected to the corresponding valve plates 15 at the same time.

[0110] This completes the installation process of the miniaturized air compressor of this preferred embodiment.

[0111] The rotating shafts at both ends of the motor of the miniaturized air compressor of this preferred embodiment extend out of the fixing part of the bracket, and the cylinder is fixed between the valve plate and the supporting part of the bracket, wherein a through hole for connecting rod movement is provided in the middle of the supporting part, and a notch connected to the through hole is provided on the side of the supporting part away from the motor, which is very convenient for the installation of the connecting rod;

[0112] The outer ring of the bearing is interference-connected in the connecting ring, and the connecting boss is interference-connected in the inner ring of the bearing, thereby ensuring the stability of the connection between the connecting rod, the bearing and the crank.

[0113] In addition, fixing hooks are provided on the fixing parts of the two brackets. The fixing hooks are located at the four corners of the four sides of the overall structure formed by connecting the two brackets and the motor. The fixing hooks at the top and bottom of the fixing part are arranged in opposite directions. The miniaturized air compressor can be fixed and installed through elastic connecting parts, so that the entire air compressor is suspended to reduce vibration and noise.

[0114] In summary, although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A miniaturized air compressor, characterized in that: include: Two brackets, each bracket comprising a fixing portion and a supporting portion arranged on top of the fixing portion; A motor is fixed between the two fixing parts, and two rotating shafts are respectively provided at both ends of the motor and extend out of the fixing parts; Two cylinders are respectively arranged on the two supporting parts; Two pistons are slidably disposed in the two cylinders respectively; Two valve plates, the valve plates are located at the top of the cylinder, and are provided with an inlet valve hole and an outlet valve hole for ventilation, and an inlet valve sheet and an outlet valve sheet for correspondingly controlling ventilation of the inlet valve hole and the outlet valve hole; Two cylinder heads are connected to the two valve plates respectively, and one cylinder head is provided with an air inlet cavity corresponding to the air inlet valve hole and an air outlet cavity corresponding to the air outlet valve hole; A crank, comprising a connecting hole and a connecting boss, wherein the connecting hole is arranged through the connecting boss, the center of the connecting hole and the center of the connecting boss are staggered, and the two cranks are fixedly connected to the rotating shafts at both ends of the motor through the connecting holes respectively; and A connecting rod, the connecting rod comprising a connecting plate and a connecting ring respectively located at two ends, the connecting ring being connected to the connecting boss via a bearing, and the connecting plate being fixedly connected to the piston; A first fixing hole for screw connection is provided on the outlet valve plate, a threaded hole for screw connection is provided on the top of the valve plate, a first sealing member is provided between the outlet valve plate and the valve plate, and a first positioning groove corresponding to the first sealing member is provided on the valve plate; A second fixing hole for screw connection is provided on the intake valve plate, a threaded hole for screw connection is provided at the bottom of the valve plate, a second sealing member is provided between the intake valve plate and the valve plate, and a second positioning groove corresponding to the second sealing member is provided on the valve plate; The first sealing member is bonded and fixed to the outlet valve plate, and the second sealing member is bonded and fixed to the inlet valve plate. The inner and outer side surfaces of the first sealing member are inclined to facilitate fitting into the first positioning groove, and the inner and outer side surfaces of the second sealing member are inclined to facilitate fitting into the second positioning groove; The first sealing member is provided with a first extension portion, the first extension portion is located on a side of the first sealing member away from the first fixing hole, and in the process of the outlet valve sheet being away from the valve plate to discharge gas, the first extension portion is always located in the first positioning groove; When the first extension portion enables the outlet valve plate to move toward the valve plate to seal the outlet valve hole, the first sealing member can quickly and smoothly seal and fit into the first positioning groove; The second sealing member is provided with a second extension portion, the second extension portion is located on a side of the second sealing member away from the second fixing hole, and the second extension portion is always located in the second positioning groove during the process in which the intake valve sheet is away from the valve plate to take in air; The second extended portion enables the intake valve sheet to move toward the valve plate to seal the intake valve hole, and the second sealing member can quickly and smoothly seal and fit into the second positioning groove; A plurality of fixing hooks for mounting the miniaturized air compressor are arranged on the fixing parts of the two brackets, the fixing hooks at the top and bottom of the fixing parts are arranged in opposite directions, and the sizes of the plurality of fixing hooks are the same; The plurality of fixing hooks are respectively located at the four corners of the four sides of the overall structure formed by connecting the two brackets and the motor, and the plurality of external elastic connectors pull the fixing hooks on the upper part of the fixing part upwards, while the plurality of external elastic connectors pull the fixing hooks on the lower part of the fixing part downwards, thereby pulling and fixing the miniaturized air compressor from multiple different directions, so that the miniaturized air compressor is suspended, reducing vibration and noise.

2. The miniaturized air compressor according to claim 1, characterized in that: A through hole for avoiding movement of the connecting rod is provided in the middle of the support part, a notch connected to the through hole for avoiding movement is provided on the side of the support part away from the motor, connecting columns are extended at the four corners of the bottom of the valve plate, threaded holes for screw connection are provided at the four corners of the top of the support part, through holes for screw connection are provided at the four corners of the cylinder head and on the connecting columns, and the screws pass through the through holes and are threadedly connected with the threaded holes to fix the cylinder head, the valve plate and the support part.

3. The miniaturized air compressor according to claim 2, characterized in that: Reinforcement parts for reinforcing the strength of the threaded hole are arranged at the four corners of the top of the support part and on the outer side of the support part.

4. The miniaturized air compressor according to claim 3, characterized in that: The outer ring of the bearing is interference-connected in the connecting ring, and the connecting boss is interference-connected in the inner ring of the bearing.

5. The miniaturized air compressor according to claim 1, characterized in that: The air inlet cavities of the two cylinder heads are connected through an air pipe, and the air outlet cavities of the two cylinder heads are connected through an air pipe. One of the cylinder heads is provided with an air inlet connected to the air inlet cavity, and the other cylinder head is provided with an air outlet connected to the air outlet cavity.

6. The miniaturized air compressor according to claim 5, characterized in that: The piston comprises a rubber ring and a piston pressing plate, a connecting groove corresponding to the piston pressing plate is arranged on the connecting plate, a threaded hole and a positioning boss are arranged at the bottom of the connecting groove, a through hole corresponding to the threaded hole and a positioning blind hole corresponding to the positioning boss are arranged on the piston pressing plate, and the rubber ring is pressed and fixed in the connecting groove through the piston pressing plate; A blind hole for avoiding the screws on the intake valve plate is also arranged on the top of the piston pressure plate.

7. The miniaturized air compressor according to claim 1, characterized in that: A fixing hook is rotatably provided at each of the four top corners of the top of the fixing part, two fixing hooks are fixedly provided at each of the four top corners of the bottom of the fixing part, and the two fixing hooks at one top corner of the bottom of the fixing part are respectively fixedly provided on the adjacent two side surfaces of the fixing part.

8. The miniaturized air compressor according to claim 1, characterized in that: The crank also includes an eccentric weight, the center of gravity of the eccentric weight, the center of the connecting boss and the center of the connecting hole are located on the same straight line, the center of gravity of the eccentric weight and the center of the connecting boss are respectively located on both sides of the center of the connecting hole, the distance between the center of gravity of the eccentric weight and the center of the connecting hole is greater than the distance between the center of the connecting boss and the center of the connecting hole, and the rotation strokes of the two cranks differ by 180°.

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