An air compressor

Abstract

An air compressor includes a machine head and an air storage tank. The machine head includes a cover, a motor, a pump head, and a pressure switch. The cover is provided with a battery pack accommodating chamber for loading a battery pack. The pressure switch is located inside the cover. The motor and the pump head are respectively placed inside the cover. The motor and the pump head are connected together to form two corner spaces on the left and right sides of the motor. The battery pack accommodating chamber is located at the corner space on one of the left and right sides of the motor. The pressure switch is located at the corner space on the other of the left and right sides of the motor. With such a design, the motor and the pump head are respectively placed inside the cover. The battery pack accommodating chamber and the pressure switch are located at the corner spaces on the left and right sides of the motor, respectively. This makes the internal layout of the machine head compact, which is conducive to reducing the size of the machine head.

Description

[Technical field]

[0001] The invention relates to an air compressor, and in particular to the structural layout of a compressor head thereof. [Background technology]

[0002] An air compressor is a commonly used power source for pneumatic tools, which is used to provide compressed high-pressure air to provide air power for pneumatic tools (such as pneumatic nail guns, sanding tools, spray paint tools, etc.) or to inflate air. The existing air compressor has a scattered structure layout and insufficient use of the internal space of the air compressor head, resulting in a large head size, so it is necessary to improve

[0003] In addition, some existing technologies are introduced: pressure switches, pressure gauges, pressure regulating knobs, and solenoid valves are all commonly used components of air compressors. The pressure switch is usually connected to the air outlet of the gas tank to monitor the air pressure in the gas tank to ensure that the air pressure in the gas tank is within a preset range. When the pressure switch monitors that the air pressure in the gas tank reaches the upper limit of the preset range, the motor and the pump head stop working and stop pumping air into the gas tank. When the pressure switch monitors that the air pressure in the gas tank reaches the lower limit of the preset range, the motor restarts and drives the pump head to pump air into the gas tank. When the air compressor is working to compress air, the compressed air is transported to the gas tank through the intake pipe (there is a one-way valve between the intake pipe and the gas tank, so as to intake air in one direction and ensure that the gas in the gas tank will not flow back through the intake pipe). After the motor stops, if the intake pipe The high air pressure (whose air pressure is approximately equal to the air pressure in the air storage tank) has not been unloaded, and the starting load of the motor when it is restarted is very large, which makes it difficult for the motor to start normally or the starting current is very large. Therefore, each time the motor stops and before it is restarted, the intake pipe needs to be depressurized through a pressure relief device (such as a solenoid valve). When the motor and the pump head are shut down, the solenoid valve only needs to be opened for 1 to 2 seconds to fully unload the high pressure in the intake pipe through the solenoid valve. The pressure relief process is very fast. When the motor and the pump head are working normally, the solenoid valve is closed, so there is no leakage of compressed gas; the pressure gauge is used to indicate the pressure value, and the pressure regulating knob is used to adjust the air pressure output by the air compressor to the external qigong tool; the pressure switch, solenoid valve, pressure gauge, pressure regulating knob structure, function and the above operation process are conventional technologies in the field of air compressors and will not be repeated in the implementation manner of the present application. [Summary of the invention]

[0004] The invention provides an air compressor with a compact internal layout of a machine head.

[0005] The present invention adopts the following technical scheme: an air compressor, including a machine head and an air storage tank, the machine head including a cover shell, a motor, a pump head, and a pressure switch, the cover shell is provided with a battery pack accommodating chamber for loading a battery pack, the pressure switch is located inside the cover shell, the motor and the pump head are respectively placed horizontally inside the cover shell, the motor and the pump head are connected together to form two corner spaces located on the left and right sides of the motor, the battery pack accommodating chamber is located in the corner space on one of the left and right sides of the motor, and the pressure switch is located in the corner space on the other of the left and right sides of the motor.

[0006] With this design, the motor and pump head are respectively placed horizontally inside the cover, and the battery pack accommodating cavity and the pressure switch are correspondingly located in the corner space on the left and right sides of the motor, making the internal layout of the machine head compact and facilitating the reduction of the volume of the machine head.

[0007] Furthermore, the pump head is located at the rear of the machine head, and the machine head also includes an air filter, which is mounted on the pump head and located outside the housing. The air filter is tilted downward and backward and located at the rear lower side of the housing. This design reduces the degree of exposure of the air filter to the rear, which can play a certain role in hiding the air filter, reduce the probability of the air filter being damaged by collision, and is conducive to reducing the packaging size of the air compressor in the front and rear directions.

[0008] Furthermore, the pump head is provided with a cylinder cover, a cylinder, and a piston that can reciprocate left and right in the cylinder to compress the air. The cylinder cover and the cylinder are located in a cover shell. The cylinder cover is provided with an air inlet passage that is located on its rear side and extends obliquely rearward and downward. The air filter is provided with a filter body and a filter outlet port. The filter outlet port is connected to the air inlet passage. The filter outlet port extends obliquely forward and upward. The filter outlet port is perpendicular to the filter body.

[0009] Furthermore, the pump head is located at the rear of the machine head, the machine head also includes an air filter, the air filter is installed on the pump head, the air filter is located outside the cover, the air tank is located below the machine head, and the air filter is located at the angle between the cover and the air tank at the rear lower side of the cover. Such a design can achieve a certain effect of hiding the air filter, reduce the probability of the air filter being damaged by collision, and help reduce the packaging size of the air compressor in the front and rear directions.

[0010] Furthermore, the pump head also includes a small pulley installed on the motor shaft, a belt, a large pulley driven by the small pulley through the belt, an eccentric shaft eccentrically arranged on the large pulley, a connecting rod driven by the eccentric shaft, a cylinder, a cylinder head, and a piston driven by the connecting rod that can reciprocate in the cylinder, the cylinder and the large pulley are located on the left and right sides of the small pulley, and the motor shaft is perpendicular to the connecting rod.

[0011] Furthermore, the pump head also includes a connecting rod bearing and a radial fan installed on the eccentric shaft. The eccentric shaft is perpendicular to the connecting rod, the inner ring of the connecting rod bearing is fixed to the eccentric shaft, the connecting rod part is located between the large pulley and the radial fan, the radial fan is eccentrically fixed to the eccentric shaft, the radial fan is coaxially arranged with the large pulley, and the cylinder and the cylinder head are located in the radial direction of the radial fan.

[0012] Furthermore, the pump head also includes a connecting rod, a connecting rod bearing, a cylinder, and a piston driven by the connecting rod and capable of reciprocating movement in the cylinder. The connecting rod is provided with a first clamping portion and a second clamping portion, and the first clamping portion and the second clamping portion are respectively located radially outward of the outer ring of the connecting rod bearing. The first clamping portion and the second clamping portion are opposite to each other up and down and clamp and fix the outer ring of the connecting rod bearing.

[0013] Furthermore, the first clamping portion is provided with a first arc portion matching the outer ring of the connecting rod bearing, and a first locking portion integrally connected to one end of the first arc portion, the second clamping portion is provided with a second arc portion matching the outer ring of the connecting rod bearing, and a second locking portion integrally connected to one end of the second arc portion, the first arc portion and the second arc portion clamp the outer ring of the connecting rod bearing, the first locking portion and the second locking portion are opposite to each other up and down, the first locking portion is provided with a first through hole penetrating the first locking portion, and the second locking portion is provided with a second through hole penetrating the second locking portion, the pump head also includes a first screw, the first screw includes a screw seat and a threaded screw column extending from the screw seat, the first locking portion is located between the screw seat and the second locking portion, the screw column penetrates into the first through hole and the second through hole, the first through hole is located between the screw seat and the second through hole, the first through hole is not provided with an internal thread, the first through hole is clearance-matched with the screw column, the second through hole is provided with an internal thread screwed to the screw column, and the screw seat presses the first locking portion toward the second locking portion. With such a design, it is easy to operate the first screw for locking, and there is no need to set an internal thread on the first locking part to be screwed with the screw column. It is only necessary to set an internal thread on the second locking part through the second through hole, which can save costs.

[0014] Furthermore, the machine head also includes a manifold, which is located at the front of the machine head, the pump head is located at the rear of the machine head, the motor and the pressure switch are respectively located between the manifold and the pump head, and the manifold and the motor are located on the same side of the left and right sides of the battery pack accommodating cavity. This design makes the machine head compact and small in size.

[0015] Furthermore, the air compressor also includes a pressure regulating knob, a pressure gauge, and at least one quick connector. The manifold includes a first ventilation pipe, a second ventilation pipe, a connecting pipe section for connecting the first ventilation pipe and the second ventilation pipe, a connecting section connected between the first ventilation pipe and the second ventilation pipe, a first port corresponding to the pressure regulating knob and a second port corresponding to the pressure gauge respectively arranged on the first ventilation pipe, and at least one outlet port arranged on the second ventilation pipe corresponding to the at least one quick connector one by one. The first ventilation pipe and the second ventilation pipe are parallel, and the connecting pipe section and the connecting section are parallel.

[0016] Furthermore, the battery pack accommodating cavity has an opening facing forward for inserting the battery pack, the first vent pipe and the second vent pipe extend in the left-right direction, and the opening of the battery pack accommodating cavity and the manifold are arranged on the front of the machine head, one on the left and one on the right. Such an arrangement benefits from the compact structure of the manifold, which enables the opening and the manifold to be arranged on the front of the machine head, one on the left and one on the right, further making the front layout of the machine head compact.

[0017] Furthermore, the air outlet port is perpendicular to the first ventilation pipe and the second ventilation pipe, the first port and the second port are parallel, the first port and the second port are both perpendicular to the first ventilation pipe and the second ventilation pipe, the air outlet port, the first ventilation pipe and the second ventilation pipe are in the same plane, the first port and the second port are perpendicular to the plane, and the connecting pipe section and the connecting section are both perpendicular to the first ventilation pipe and the second ventilation pipe.

[0018] Furthermore, the air compressor also includes a left supporting frame, a right supporting frame, and a handle for the mobile air compressor located above the machine head. The machine head is located on the upper side of the gas tank, and the gas tank and the machine head are respectively located between the left supporting frame and the right supporting frame. The handle crosses the machine head, and the handle has no contact with the machine head. One end of the handle is fixed to the left supporting frame, and the other end of the handle is fixed to the right supporting frame.

[0019] Furthermore, the left support frame includes a first cross beam located at the upper part thereof, the right support frame includes a second cross beam located at the upper part thereof, one end of the handle is locked to the first cross beam, the other end of the handle is locked to the second cross beam, a first positioning mechanism is provided between the first cross beam and the cover shell, the first positioning mechanism includes a first positioning hole and a first positioning protrusion inserted into the first positioning hole, the first positioning protrusion is provided at one of the first cross beam and the cover shell, the first positioning hole is provided at the other of the first cross beam and the cover shell, a second positioning mechanism is provided between the second cross beam and the cover shell, the second positioning mechanism includes a second positioning hole and a second positioning protrusion inserted into the second positioning hole, the second positioning protrusion is provided at one of the second cross beam and the cover shell, and the second positioning hole is provided at the other of the second cross beam and the cover shell.

[0020] Furthermore, the air compressor also includes an air intake pipeline for fluidly connecting the air storage tank and the pump head, and the head also includes a pressure relief device for relieving pressure in the air intake pipeline. The air compressor is powered by a battery pack, the motor is a brushless motor, and the pressure relief device is a solenoid valve.

[0021] Furthermore, the machine head is located on the upper side of the gas tank, the cover shell includes a first shell and a second shell fixed together, the solenoid valve, the pressure switch, the motor and the pump head are located in the space enclosed by the first shell and the second shell, the motor is horizontally placed, the motor is suspended and separated from the second shell in the up and down directions, and the solenoid valve is located below the motor.

[0022] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Brief Description of the Drawings

[0023] Figure 1 A three-dimensional diagram of the air compressor of the present invention from one angle;

[0024] Figure 2 It is a three-dimensional diagram of the air compressor of the present invention from another angle;

[0025] Figure 3 This is a top view of the air compressor of the present invention without the first housing, handle, etc.;

[0026] Figure 4 A three-dimensional diagram of the air compressor of the present invention without the first housing, the handle, the right support frame, etc.;

[0027] Figure 5 A three-dimensional diagram of the air compressor of the present invention without the first housing, the handle, the right support frame, a right crossbeam, etc.;

[0028] Figure 6 It is a combined stereogram of the air storage tank, supporting feet, base plate, left and right side beams, etc. of the air compressor of the present invention;

[0029] Figure 7 A three-dimensional diagram of the air compressor cushioning pad of the present invention;

[0030] Figure 8 It is an exploded view of the air compressor pump head of the present invention;

[0031] Fig. 9 A three-dimensional view of the pump head bracket, locking piece, and buffer pad of the air compressor of the present invention;

[0032] Fig.10 It is a view of the separated state of the manifold, pressure regulating knob, pressure gauge, hose, etc. of the air compressor of the present invention;

[0033] Fig.11 It is a three-dimensional diagram of the solenoid valve of the air compressor of the present invention;

[0034] Fig.12 is a three-dimensional diagram of the second housing of the air compressor of the present invention;

[0035] Fig.13 It is a three-dimensional diagram of the first housing of the air compressor of the present invention;

[0036] Fig.14 It is a three-dimensional diagram of the right supporting frame of the air compressor of the present invention;

[0037] Fig.15 It is a three-dimensional diagram of the left supporting frame of the air compressor of the present invention;

[0038] Fig.16A three-dimensional diagram of the air compressor support foot of the present invention;

[0039] Fig.17 It is a partial longitudinal sectional view of the air compressor of the present invention;

[0040] Fig.18 It is a transverse cross-sectional view of the air compressor motor and pump head along the motor shaft of the present invention;

[0041] Fig.19 It is a longitudinal cross-sectional view of the pump head cylinder cover and the air filter of the air compressor of the present invention (the cross-sectional view is the vertical plane where the central axis of the air filter is located);

[0042] Fig. 20 It is a cross-sectional view of the air compressor intake pipe connector of the present invention. [Specific implementation method]

[0043] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0044] Reference Figures 1 to 20 As shown, the air compressor includes an air tank 10, a machine head, a left support frame 2, a right support frame 3, an air inlet pipeline, and an air outlet pipeline. The machine head includes a motor 11, a manifold 4, a pump head 5, a housing 60, a pressure regulating knob 171, and a pressure gauge 172. The motor 11, the manifold 4, and the pump head 5 are located inside the housing 60; the air inlet pipeline is used to fluidically connect the air tank 10 and the pump head 5, and the air outlet pipeline is used to fluidically connect the air tank 10 and the manifold 4. The motor 11 drives the pump head 5 to run to compress the air, and the compressed air is stored in the air tank 10 through the air inlet pipeline. The rated power of the motor 11 is between 100w and 3000w, preferably between 200w and 1800w, and the motor 11 is preferably a brushless motor. The left support frame 2 is located on the left side of the gas tank 10, the right support frame 3 is located on the right side of the gas tank 10, the machine head is located on the upper side of the gas tank 10, the machine head and the gas tank 10 are respectively located between the left support frame 2 and the right support frame 3, the machine head includes a cover 60, the motor 11 is located inside the cover 60, and the cover 60 is located between the left support frame 2 and the right support frame 3. With this design, the air compressor has a compact structure layout, which is conducive to the miniaturization of the air compressor. The left support frame 2 and the right support frame 3 can be made of plastic.

[0045] The air compressor also includes a handle 12 for moving the air compressor located above the head. The handle 12 crosses the head, and the handle 12 has no contact with the head. One end of the handle 12 is fixed to the left support frame 2, and the other end of the handle 12 is fixed to the right support frame 3. With such a design, since the head is the core unit of the air compressor and is relatively precise, the handle 12 has little effect on the head when the air compressor is moved by pulling the handle 12, which avoids the handle 12 being directly connected to the head, causing the head to be easily loosened by the direct pull of the handle 12, which is conducive to the head maintaining a stable position on the air compressor. The left support frame 2 includes a first crossbeam 20, a third crossbeam 21, and a fifth crossbeam 22. The first crossbeam 20 is located at the upper part of the left support frame 2. The right support frame 3 includes a second crossbeam 30, a fourth crossbeam 31, and a sixth crossbeam 32. The second crossbeam 30 is located at the upper part of the right support frame 3. One end of the handle 12 is locked to the first beam 20 , and the other end of the handle 12 is locked to the second beam 30 ; specifically, the left end of the handle 12 is locked to the first beam 20 by screws, and the right end of the handle 12 is locked to the second beam 30 by screws.

[0046] A first positioning mechanism is provided between the left supporting frame 2 and the cover shell 60, and the first positioning mechanism includes a first positioning hole 6100 and a first positioning protrusion 200 inserted into the first positioning hole 6100, the first positioning protrusion 200 is provided at one of the left supporting frame 2 and the cover shell 60, and the first positioning hole 6100 is provided at the other of the left supporting frame 2 and the cover shell 60, and a second positioning mechanism is provided between the right supporting frame 3 and the cover shell 60, and the second positioning mechanism includes a second positioning hole 6101 and a second positioning protrusion 300 inserted into the second positioning hole 6101, the second positioning protrusion 300 is provided at one of the right supporting frame 3 and the cover shell 60, and the second positioning hole 6101 is provided at the other of the right supporting frame 3 and the cover shell 60. With such a design, through the first positioning mechanism and the second positioning mechanism, the position of the cover shell 60 and the left supporting frame 2 and the left supporting frame 2 can be accurately determined during assembly to avoid assembly position deviation. The cover 60 includes a first shell 61 and a second shell 62, the first shell 61 and the second shell 62 are fixed together, the second shell 62 is located between the first shell 61 and the gas tank 10, and the second shell 62 is located above the gas tank 10, the first positioning protrusion 200 is provided at one of the first beam 20 and the first shell 61, the first positioning hole 6100 is provided at the other of the first beam 20 and the first shell 61, the second positioning protrusion 300 is provided at one of the second beam 30 and the first shell 61, and the second positioning hole 6101 is provided at the other of the second beam 30 and the first shell 61, the air compressor also includes a base plate 13, the base plate 13 is located above the gas tank 10, the base plate 13 is welded and fixed to the gas tank 10, the base plate 13 is located between the second shell 62 and the gas tank 10, and the second shell 62 is locked to the base plate 13; the first shell 61 is indirectly fixed to the base plate 13 through the second shell 62, and the first shell 61 is locked to the second shell 62 by screws.

[0047] The air compressor also includes a plurality of supporting legs 14, which include a welding portion 140, a supporting portion 141, and a connecting portion 142 connecting the welding portion 140 and the supporting portion 141. The welding portion 140 is bent from the connecting portion 142 to one of the left and right sides and is in a plate shape. The supporting portion 141 is bent from the connecting portion 142 to the other of the left and right sides and is in a plate shape. The welding portion 140 is abutted against and welded to the gas tank 10. Such a design is conducive to ensuring a larger welding area and supporting area, thereby improving the stability of the supporting leg 14. The connecting portion 142 includes a first portion 143 and a second portion 144 that are connected, a corner is formed between the first portion 143 and the second portion 144, the first portion 143 and the second portion 144 are respectively plate-shaped, the welding portion 140 is bent from the upper end of the first portion 143 to one of the left and right sides, the supporting portion 141 is bent from the lower end of the second portion 144 to the other of the left and right sides, the welding portion 140 and the first portion 143 form an L-shape, the supporting portion 141 and the second portion 144 form an L-shape, the supporting portion 141 is horizontally arranged, the welding portion 140 is inclined relative to the horizontal plane, the second portion 144 is vertically arranged, and the first portion 143 is inclined relative to the second portion 144. With such a design, the supporting capacity of the supporting leg 14 is improved, and the supporting leg 14 is not easy to collapse.

[0048] The support leg 14 is divided into a left support leg and a right support leg. In this embodiment, there are 4 support legs 14, including 2 left support legs and 2 right support legs. The welding portion 140 of the left support leg is bent to the right from its connection portion 142, and the support portion 141 of the left support leg is bent to the left from its connection portion 142. The welding portion 140 of the right support leg is bent to the left from its connection portion 142, and the support portion 141 of the right support leg is bent to the right from its connection portion 142. The support portion 141 of the left support leg is locked to the left support frame 2, and the support portion 141 of the right support leg is locked to the right support frame 3. With such a design, the support leg 14 not only plays the role of supporting the gas tank 10, but also strengthens the fixation and integrity between the gas tank 10 and the left support frame 2 and the right support frame 3 through the support leg 14. A left supporting platform 23 is provided at the bottom of the left supporting frame 2, and a right supporting platform 33 is provided at the bottom of the right supporting frame 3. The supporting portion 141 of the left supporting leg is downwardly supported on the left supporting platform 23, and the supporting portion 141 of the left supporting leg is locked to the left supporting platform 23. The supporting portion 141 of the right supporting leg is downwardly supported on the right supporting platform 33, and the supporting portion 141 of the right supporting leg is locked to the right supporting platform 33. With such a design, stable and targeted support for the corresponding supporting legs 14 can be achieved through each support 23, 33, and the supporting position of each supporting leg 14 is stable and does not deviate through locking.

[0049] The air compressor also includes a left support pad 150 installed on the left support platform 23 and a right support pad 151 installed on the right support platform 33. The left support platform 23 protrudes upward and has a left depression 230 that is concave upward formed at its bottom. The right support platform 33 protrudes upward and has a right depression 330 that is concave upward formed at its bottom. The left support pad 150 extends downward beyond the left support frame 2 and is partially accommodated in the left depression 230. The right support pad 151 extends downward beyond the right support frame 3 and is partially accommodated in the right depression 330. The support portion 141 of the left support leg, the left support platform 23, and the left support pad 150 are locked together. The support portion 141 of the right support leg, the right support platform 33, and the right support pad 151 are locked together. The support portion 141 of the left support leg, the left support platform 23, and the left support pad 150 are locked together by screws or bolts, and the support portion 141 of the right support leg, the right support platform 33, and the right support pad 151 are locked together by screws or bolts; in this embodiment, screw fixing is adopted, and the support portion 141 of the left support leg, the left support platform 23, the left support pad 150, the support portion 141 of the right support leg, the right support platform 33, and the right support pad 151 are respectively provided with through holes for screws to penetrate, and the through holes of the support portion 141 of the left support leg and the support portion 141 of the right support leg are provided with internal threads for screws to penetrate. The screws are screwed and fixed. The screws are passed through the through holes of the left support pad 150, the left support platform 23, and the support portion 141 of the left support leg from bottom to top and are screwed and fixed with the through holes of the support portion 141 of the left support leg to lock the left support pad 150, the left support platform 23, and the support portion 141 of the left support leg together. The screws are passed through the through holes of the right support pad 151, the right support platform 33, and the support portion 141 of the right support leg from bottom to top and are screwed and fixed with the through holes of the support portion 141 of the right support leg to lock the right support pad 151, the right support platform 33, and the support portion 141 of the right support leg together.

[0050] The left supporting frame 2 is also provided with a first vertical beam 24 and a third vertical beam 25 spaced front to back, and the right supporting frame 3 is provided with a second vertical beam 34 and a fourth vertical beam 35 spaced front to back. The number of the left supporting platform 23 is two and they are respectively arranged on the first vertical beam 24 and the third vertical beam 25, and the number of the right supporting platform 33 is two and they are respectively arranged on the second vertical beam 34 and the fourth vertical beam 35; the left supporting frame 2 and the right supporting frame 3 are respectively in the shape of a "sun", and the first cross beam 20, the third cross beam 21, and the fifth cross beam 22 are distributed from top to bottom in sequence. The five cross beams 22 are respectively connected between the first vertical beam 24 and the third vertical beam 25, and the second cross beam 30, the fourth cross beam 31, and the sixth cross beam 32 are arranged from top to bottom in sequence. The second cross beam 30, the fourth cross beam 31, and the sixth cross beam 32 are respectively connected between the second vertical beam 34 and the fourth vertical beam 35. With such a design, the left support frame 2 and the right support frame 3 are stable. Each support platform is arranged on the corresponding vertical beam, so that the torque generated by each support foot 14 on the corresponding support frame 2, 3 is small, which is beneficial to the stability of each support frame 2, 3 and avoids or reduces its distortion. Each vertical beam 24, 25, 34, 35 is roughly arranged vertically, and each cross beam 20, 21, 22, 30, 31, 32 is roughly arranged horizontally, and each vertical beam 24, 25, 34, 35 and each cross beam 20, 21, 22, 30, 31, 32 are roughly in a vertical state.

[0051] The air compressor further includes at least one left cross beam 160 welded to the air storage tank 10 and at least one right cross beam 161 welded to the air storage tank 10. The left cross beam 160 is locked to the left support frame 2, and the right cross beam 161 is locked to the right support frame 3. The left cross beam 160 abuts against the third cross beam 21, and the third cross beam 21 shields at least a part of the left cross beam 160 from the left side of the left cross beam 160. The right cross beam 161 abuts against the fourth cross beam 31, and the fourth cross beam 31 shields at least a part of the right cross beam 161 from the right side of the right cross beam 161. With such a design, the stability and compactness of the air compressor structure are enhanced. One of the left cross beams 160 is locked to the first vertical beam 24, and the other left cross beam 160 is locked to the third vertical beam 25. One of the right cross beams 161 is locked to the second vertical beam 34, and the other right cross beam 161 is locked to the fourth vertical beam 35. The first cross beam 20, the third cross beam 21, the fifth cross beam 22, the first vertical beam 24, and the third vertical beam 25 together form a "day" shape, and the second cross beam 30, the fourth cross beam 31, the sixth cross beam 32, the second vertical beam 34, and the fourth vertical beam 35 together form a "day" shape. With such a design, the structures of the left support frame 2 and the right support frame 3 are stable. The locking positions of the left cross beams 160 and the right cross beams 161 on the corresponding support frames 2 and 3 are relatively evenly distributed, and the torque generated on the corresponding support frames 2 and 3 is small, which is beneficial to the stability of each support frame 2 and 3 and reduces the torsional deformation. The aforementioned left and right cross beams 160 and 161 can be locked to the corresponding vertical beams 24, 25, 34, and 35 by bolts or screws. The air compressor of this embodiment includes two of the left cross beams 160 and two of the right cross beams 161. The two left cross beams 160 are at the same height and are arranged at intervals one in front of the other. The two right cross beams 161 are at the same height and are arranged at intervals one in front of the other. The two left cross beams 160 are respectively provided with left inclined edges 162 welded to the surface of the air storage tank 10, and the two right cross beams 161 are respectively provided with right inclined edges 163 welded to the surface of the air storage tank 10. The part of the surface of the air storage tank 10 between the two left cross beams 160 protrudes leftward from the part of the surface of the air storage tank 10 welded to each left inclined edge 162, and the part of the surface of the air storage tank 10 between the two right cross beams 161 protrudes rightward from the part of the surface of the air storage tank 10 welded to each right inclined edge 163. With such a design, it is avoided to weld the left cross beam 160 and the left cross beam 160 on the surface of the most protruding parts at the left and right ends of the air storage tank 10, which is beneficial to reducing the left and right spacing between the left cross beam 160 and the right cross beam 161 and reducing the size of the air compressor in the left and right directions, thereby facilitating the miniaturization of the air compressor.

[0052] The gas tank 10 is cylindrical with raised left and right ends. The gas tank 10 is placed horizontally and perpendicular to the front-to-back direction. The gas tank 10 includes a left end surface 100 located at its left end and presenting a curved surface convex to the left, and a right end surface 101 located at its right end and presenting a curved surface convex to the right. The two left cross beams 160 are respectively welded to the left end surface 100, and the two right cross beams 161 are respectively welded to the right end surface 101. The left hypotenuse 162 of the two left cross beams 160 is welded to the left end surface 100, and the right hypotenuse 163 of the two right cross beams 161 is welded to the right end surface 101. The portion of the left end surface 100 located between the two left cross beams 160 protrudes to the left from the portion of the left end surface 100 welded to the left hypotenuse 162, and the portion of the right end surface 101 located between the two right cross beams 161 protrudes to the right from the portion of the right end surface 101 welded to the right hypotenuse 163. Such a design avoids welding bevel edges on the most protruding surfaces of the left and right ends of the gas storage tank 10, which is conducive to shrinking the left-right spacing between the left crossbeam 160 and the right crossbeam 161. The third crossbeam 21 is provided with a first upper wall 210 and a first lower wall 211 respectively connected between the first vertical beam 24 and the third vertical beam 25, the fifth crossbeam 22 is provided with a second upper wall 220 and a second lower wall 221 respectively connected between the first vertical beam 24 and the third vertical beam 25, the first lower wall 211 and the second upper wall 220 are opposite to each other, the first lower wall 211 is provided with an arc-shaped clearance edge 212 matching the left end face 100, the second upper wall 220 is provided with an arc-shaped clearance edge 222 matching the left end face 100, the fourth crossbeam 31 is provided with a third upper wall 310 and a third lower wall 311 respectively connected between the second vertical beam 34 and the fourth vertical beam 35, the sixth crossbeam 32 is provided with a second upper wall 220 and a second lower wall 221 respectively connected between the second ... The fourth upper wall 320 and the fourth lower wall 321 between 34 and the fourth vertical beam 35, the third lower wall 311 and the fourth upper wall 320 are opposite to each other up and down, the third lower wall 311 is provided with an arc-shaped making way edge 312 matching the right end face 101, and the fourth upper wall 320 is provided with an arc-shaped making way edge 322 matching the right end face 101; the two left-side cross beams 160 are at least partially located between the first upper wall 210 and the first lower wall 211, and the two right-side cross beams 161 are at least partially located between the third upper wall 310 and the third lower wall 311. Such a design is conducive to retracting the left and right distance between the left supporting frame 2 and the right supporting frame 3, reducing the left and right dimensions of the air compressor, and facilitating the miniaturization of the air compressor.

[0053] The machine head also includes a pressure switch 170. The housing 60 is provided with a battery pack receiving chamber 63 for loading the battery pack. The pressure switch 170 is located inside the housing 60. The motor 11 and the pump head 5 are respectively placed in the housing 60. The motor 11 and the pump head 5 are connected together to form two corner spaces 640 and 641 on the left and right sides of the motor 11. The battery pack receiving chamber 63 is located in the corner space 640 on one side of the left and right sides of the motor 11. The pressure switch 170 is located in the corner space 641 on the other side of the left and right sides of the motor 11. Such a design makes the internal layout of the machine head compact, which is conducive to reducing the size of the machine head. The motor 11 and the pressure switch 170 are respectively located between the manifold 4 and the pump head 5. The manifold 4 and the motor 11 are located on the same side of the left and right sides of the battery pack receiving chamber 63.

[0054] The pump head 5 is located at the rear of the machine head. The machine head also includes an air filter 70. The air filter 70 is installed on the pump head 5. The air filter 70 is located outside the cover 60. The air filter 70 is tilted. The air filter 70 is tilted backward and downward. The air filter 70 is located on the rear lower side of the machine head. This design reduces the degree of exposure of the air filter 70 to the rear, which can play a certain effect of hiding the air filter 70, reduce the probability of the air filter 70 being damaged by collision, and help reduce the packaging size of the air compressor in the front and back directions. The air filter 70 is located at the angle b between the cover 60 and the air storage tank 10 on the rear lower side of the cover 60. This design makes fuller use of space and helps reduce the packaging size of the air compressor in the front and back directions. The pump head 5 is provided with a cylinder head 50, a valve plate 51, a cylinder 52, and a piston 53 that can reciprocate left and right in the cylinder 52 to compress the air. The piston 53 includes a piston ring 530. The cylinder head 50, the valve plate 51, and the cylinder 52 are located in the cover 60. The cylinder head 50 and the valve plate 51 and the cylinder 52 are sequentially distributed in the left-right direction. The cylinder head 50, the valve plate 51 and the cylinder 52 are fixed together. The cylinder head 50 is provided with an air intake passage 500 arranged at the rear side thereof and extending obliquely to the rear and downward direction. The air filter 70 is connected to the air intake passage 500. The cylinder 52 is provided with a cylinder rear side wall 501 and a cylinder end wall 502 integrally connected with the cylinder rear side wall 501 and spaced opposite to the valve plate 51. The air intake passage 500 is opened in and penetrates the cylinder rear side wall 501. The air filter 70 is provided with a filter body 71 and a filter outlet port 72. The filter body 71 includes a filter housing 710, a filter element 711 located in the filter housing 710 and a filter inlet port 712. The filter outlet port 72 is connected to the air intake passage 500. The filter outlet port 72 is perpendicular to the filter body 71 and extends obliquely to the front and upward direction. The filter element 711 can be a sponge, and the filter element 711 is located between the filter outlet port 72 and the filter inlet port 712. The air enters from the filter inlet port 712, and after being filtered by the filter element 711, it enters the cylinder head 50 through the filter outlet port 72 and the inlet channel 500. The central axis c of the air filter 70 extends obliquely along the rear lower direction and the front upper direction, and the angle a between the central axis of the air filter 70 and the horizontal plane is 110 degrees to 150 degrees, preferably 115 degrees or 135 degrees. When the pump head 5 is working, the air flows in the following direction: the air enters the first chamber 503 of the cylinder head 50 from the air filter 70 and the intake passage 500, and then pushes open the first valve plate 510 of the valve plate 51 and passes through the valve plate 51 into the cylinder 52; under the compression of the piston 53, the compressed air pushes open the second valve plate of the valve plate 51 (not shown, the first valve plate 510 and the second valve plate are located on opposite sides of the valve plate 51) and passes through the valve plate 51 into the second chamber 504 of the cylinder head 50, and then is stored in the air storage tank 10 through the intake pipe.

[0055] The pump head 5 further includes a small pulley 540 mounted on the motor rotating shaft 110, a belt 541, a large pulley 542 driven by the small pulley 540 through the belt 541, an eccentric shaft 543 eccentrically disposed on the large pulley 542, a connecting rod 56 driven by the eccentric shaft 543, and a bracket 58; the piston 53 reciprocates in the cylinder 52 under the drive of the connecting rod 56 to compress air; the cylinder 52 and the large pulley 542 are located on the left and right sides of the small pulley 540, and the motor rotating shaft 110 is perpendicular to the connecting rod 56. The motor 11 is fixed to the bracket 58 by screws or bolts, the cylinder head 50, the valve plate 51 and the cylinder 52 are fixed relative to the bracket 58, the cylinder head 50 and the valve plate 51 are fixed to the bracket 58 by screws, the cylinder 52 is pressed and fixed between the valve plate 51 and the bracket 58, the cylinder head 50 and the valve plate 51 are sealed by an "O"-shaped sealing ring 546, the valve plate 51 and the cylinder 52 are sealed by an annular sealing ring 547, the cylinder 52 is cylindrical, the pump head 5 further includes a large pulley rotating shaft 548, a first bearing 550, and a second bearing 551, the bracket 58 is provided with a first bearing cavity 552 for receiving the first bearing 550 and a second bearing cavity 553 for receiving the second bearing 551, the inner ring of the first bearing 550 is fixed to the motor rotating shaft 110, and the inner ring of the second bearing 551 is fixed to the large pulley rotating shaft 548. The large pulley rotating shaft 548 is parallel to the motor rotating shaft 110, and the large pulley rotating shaft 548 and the motor rotating shaft 110 are in the same horizontal plane.

[0056] The pump head 5 further includes a connecting rod bearing 554 and a radial fan 555 mounted on the eccentric shaft 543. The connecting rod 56 is partially located between the large pulley 542 and the radial fan 555. The inner ring 556 of the connecting rod bearing 554 is fixed to the eccentric shaft 543. The connecting rod 56 is provided with a first clamping portion 560 and a second clamping portion 561. The first clamping portion 560 and the second clamping portion 561 are respectively located radially outside the outer ring 557 of the connecting rod bearing 554. The first clamping portion 560 and the second clamping portion 561 are opposite to each other up and down and clamp and fix the outer ring 557 of the connecting rod bearing 554. The first clamping portion 560 and the second clamping portion 561 are locked by screws or bolts to clamp and fix the outer ring 557 of the connecting rod bearing 554. The first clamping portion 560 and the second clamping portion 561 clamp the outer ring 557 of the connecting rod bearing 554 up and down. In this embodiment, the first clamping portion 560 includes a first arc portion 5600 matching the outer ring 557 of the connecting rod bearing 554, and a first locking portion 5601 integrally connected to one end of the first arc portion 5600, and the second clamping portion 561 includes a second arc portion 5610 matching the outer ring 557 of the connecting rod bearing 554, and a second locking portion 5611 integrally connected to one end of the second arc portion 5610. 10 clamps the outer ring 557 of the connecting rod bearing 554, the first locking portion 5601 and the second locking portion 5611 are opposite to each other in vertical direction, further, the first locking portion 5601 and the second locking portion 5611 are spaced apart in vertical direction, the first locking portion 5601 is provided with a first through hole 5602 penetrating the first locking portion 5601, the second locking portion 5611 is provided with a second through hole 5612 penetrating the second locking portion 5611, the pump head 5 further includes a first screw 544, the first screw 54 The screw seat 5440 includes a screw column 5441 with a thread extending from the screw seat 5440, the first locking portion 5601 is located between the screw seat 5440 and the second locking portion 5611, the screw column 5441 penetrates the first through hole 5602 and the second through hole 5612, the first through hole 5602 is located between the screw seat 5440 and the second through hole 5612, the first through hole 5602 is not provided with an internal thread, and the space between the first through hole 5602 and the screw column 5441 is The second through hole 5612 is provided with an internal thread (not shown) that is screwed with the screw column 5441, and the screw seat 5440 presses the first locking portion 5601 toward the second locking portion 5611. With this design, it is easy to operate the first screw 544 for locking, and there is no need to set an internal thread on the first locking portion 5601 to screw with the screw column 5441. It is only necessary for the second locking portion 5611 to open an internal thread through the second through hole 5612, which can save the cost of opening the thread. The first locking portion 5601 is located at the free end of the first clamping portion 560, and the second locking portion 5611 is located at the free end of the second clamping portion 561.The eccentric shaft 543 is perpendicular to the connecting rod 56, the radial fan 555 is eccentrically fixed to the eccentric shaft 543, the radial fan 555 is coaxially arranged with the large pulley 542 (that is, the rotation axis of the radial fan 555 and the rotation axis of the large pulley 542 are basically on the same axis), the cylinder 52 is located in the radial direction of the radial fan 555, and the radial fan 555 is eccentrically fixed to the eccentric shaft 543 - that is, the position on the radial fan 555 that is fixed to the eccentric shaft 543 is not the exact center position of the radial fan 555, but deviates from the exact center position of the radial fan 555.

[0057] The head also includes a pressure relief device for relieving pressure in the air intake line, and the pressure relief device adopts a solenoid valve 57. The present air compressor can have the following three features at the same time: first, it is powered by a battery pack; second, it adopts a brushless motor (the brushless motor 11 is a more efficient motor 11 than the brushed motor 11); and third, it adopts a solenoid valve 57; the use of a battery pack for powering improves the ease of use of the air compressor, and the battery pack-powered air compressor of the present application is the first to simultaneously adopt a brushless motor 11 and a solenoid valve 57, which effectively improves the efficiency, and the air compressor can work longer under the same battery capacity, specifically compensating for the defect of insufficient energy storage of the battery pack, thereby improving the existing battery pack-powered air compressor The pain point of weak working durability has been better balanced between the portability and working durability of the air compressor, making the battery-powered air compressor more acceptable to users and promoting the popularization of battery-powered air compressors. The battery pack can be a rechargeable and reusable lithium battery pack. The rated voltage of the battery pack is 20 volts, the battery capacity is 12 ampere hours, and 20 battery cells are used. Every 5 battery cells are connected in series to form a group, and 4 groups of battery cells are connected in parallel. The motor 11 is horizontally placed, the motor 11 is suspended and separated from the second shell 62 in the vertical direction, the solenoid valve 57 is located below the motor 11, and the manifold 4, the solenoid valve 57, the pressure switch 170, the motor 11 and the pump head 5 are located in the space surrounded by the first shell 61 and the second shell 62. Such a design effectively utilizes the lower space left by the motor 11 being suspended, and the layout is more compact, which is conducive to saving space. The motor 11 is vertically connected to the pump head 5, and the motor 11 is horizontally placed, that is, the rotating shaft of the motor 11 is basically set horizontally.

[0058] The manifold 4 is a metal pipe, preferably made of stainless steel or aluminum alloy. The manifold 4 includes a first vent pipe 40, a second vent pipe 41, a connecting pipe section 42 and a connecting section 43. The first vent pipe 40, the second vent pipe 41, the connecting pipe section 42 and the connecting section 43 are connected as a whole. The connecting pipe section 42 and the connecting section 43 are respectively connected between the first vent pipe 40 and the second vent pipe 41. The first vent pipe 40 and the second vent pipe 41 are arranged in parallel, and the connecting pipe section 42 and the connecting section 43 are arranged in parallel. Such a design makes the manifold 4 mechanically compact, with improved strength, and easy to store. The connecting pipe section 42 is used to connect the first vent pipe 40 and the second vent pipe 41 for fluid. The connecting section 43 connects the first vent pipe 40 and the second vent pipe 41 to enhance the mechanical strength and stability of the manifold 4. The connecting section 43 is in the shape of a flat strip. The manifold 4 further includes a first port 44 corresponding to the pressure regulating knob 171, a second port 45 corresponding to the pressure gauge 172, and at least one outlet port 46 disposed on the second vent pipe 41. The first port 44 is disposed on the first vent pipe 40, and the second port 45 is disposed on the first vent pipe 40. The machine head further includes at least one quick connector 173 corresponding to the at least one outlet port 46, and the quick connector 173 is installed to the corresponding outlet port 46. The quick connector 173 is a common component of an air compressor. As an air supply connector of an air compressor, the quick connector 173 is connected to the pneumatic tool through a hose or the like when in use, and high-pressure gas is supplied to the pneumatic tool by the quick connector 173 to drive the operation of the pneumatic tool. The outlet port 46 is perpendicular to the first vent pipe 40 and the second vent pipe 41, and the first port 44 and the second port 45 are parallel, and the first port 44 and the second port 45 are both perpendicular to the first vent pipe 40 and the second vent pipe 41. The outlet port 46, the first vent pipe 40, and the second vent pipe 41 are in the same plane, and the first port 44 and the second port 45 are perpendicular to the plane. Furthermore, the outlet port 46, the first vent pipe 40, the second vent pipe 41, the connecting pipe section 42, and the connecting section 43 are in the same plane, and the connecting pipe section 42 and the connecting section 43 are perpendicular to the first vent pipe 40 and the second vent pipe 41.

[0059] The air intake line includes a hose member 91 with joints at opposite ends and a connector 92. The hose member 91 is located in the space surrounded by the first housing 61 and the second housing 62, and the hose member 91 passes through the bottom of the motor 11. The connector 911 at one end of the hose member 91 is connected to the second chamber 504 of the cylinder head 50, and the port 920 of the connector 92 is connected to the connector 910 at the other end of the hose member 91 (threaded connection). The port 921 of the connector 92 is connected to the air intake port 102 of the gas storage tank 10 (threaded connection). The port 922 of the connector 92 is connected to the air intake port 570 of the solenoid valve 57 (threaded connection). A check valve 923 is provided in the connector 92. After the high-pressure gas pushes the check valve 923 open, it passes through the port 921 and the air intake port 102 of the gas storage tank 10 in sequence and is stored in the gas storage tank 10. When the pressure is released, the solenoid valve 57 is opened, and the high-pressure gas is discharged from the port 922 through the gas outlet 571 of the solenoid valve 57. The air outlet pipeline includes a hose component 93, which is used to connect between the first vent pipe 40 and the air outlet port 103 of the air tank 10, and the connector 930 of the hose component 93 is connected to one end 400 of the first vent pipe 40. When the air compressor supplies air to the pneumatic tool, the pneumatic tool is connected to the quick connector 173 through a hose or the like, and the high-pressure gas in the air tank 10 flows through the air outlet port 103, the air outlet pipeline, the first vent pipe 40, the connecting pipe section 42, the second vent pipe 41, the quick connector 173 in sequence, and is finally delivered to the pneumatic tool to drive the pneumatic tool to work.

[0060] Pneumatic tools are commonly found in air compressors through the quick connector 173, which is used as an air supply connector of the air compressor to supply high-pressure gas to the pneumatic tools. When in use, the quick connector 173 will be connected to an external air supply hose, and the air supply hose will be connected to the pneumatic tool. The quick connector 173 delivers high-pressure gas to the pneumatic tool through the external air supply hose to drive the operation of the pneumatic tool.

[0061] The cover shell 60 is provided with a first panel 611 and a second panel 620. The first panel 611 is provided with a first opening 6110 and a second opening 6111. The second panel 620 is provided with at least one third opening 6200. The pressure regulating knob 171 is installed to the first port 44 and is partially accommodated in the first opening 6110. The pressure gauge 172 is installed to the second port 45 and is partially accommodated in the second opening 6111. The quick connector 173 is partially accommodated in the corresponding third opening 6200. The first panel 611 is inclined and is parallel to the first ventilation pipe 40. The first panel 611 is perpendicular to the second panel 620. The second panel 620 is inclined and is parallel to the second ventilation pipe 41. The first ventilation pipe 40 is parallel to the second ventilation pipe 41. The first panel 611 is provided with a numerical scale indicating the air pressure around the first opening 6110, so that the output air pressure value adjusted by the pressure regulating knob 171 can be known according to the numerical scale corresponding to the position to which the pressure regulating knob 171 is rotated, thereby eliminating a pressure gauge 172; the pressure regulating knob 171 can be rotated from the maximum value of the numerical scale to the minimum value of the numerical scale within one rotation (about 330 degrees) - that is, zero. The pressure gauge 172 is used to indicate the pressure value, and the pressure regulating knob 171 is used to adjust the air pressure output by the air compressor to the external qigong tool. The first panel 611 is a part of the first shell 61, and the second panel 620 is a part of the second shell 62.

[0062] The battery pack accommodating cavity 63 has an opening 630 facing forward for inserting the battery pack, the first vent pipe 40 and the second vent pipe 41 extend in the left-right direction, the first vent pipe 40 and the second vent pipe 41 are perpendicular to the front-back direction, the opening 630 of the battery pack accommodating cavity 63 and the manifold 4 are arranged on the front of the machine head, one on the left and one on the right. Such an arrangement benefits from the compact structure of the manifold 4, so that the opening 630 and the manifold 4 can be arranged on the left and one on the right (the opening 630 can be on the left and the manifold 4 can be on the right, or the opening 630 can be on the right and the manifold 4 can be on the left) on the front of the machine head, further making the front layout of the machine head compact. The motor shaft 110 is perpendicular to the left-right direction and arranged horizontally, the axial direction of the motor shaft 110 extends along the front-back direction, the motor shaft 110, the first vent pipe 40, and the second vent pipe 41 are arranged horizontally, respectively, and the first vent pipe 40 and the second vent pipe 41 are perpendicular to the motor shaft 110.

[0063] The head is also provided with a circuit board module 18, and the circuit board module 18 is located in the space enclosed by the first shell 61 and the second shell 62. The second shell 62 is provided with a first side wall 621 extending upward and a second side wall 622 extending upward. The circuit board module 18 is vertically placed in the cover shell 60 and is close to the first side wall 621. With such a design, the circuit board module 18 is vertically placed in the cover shell 60 so that the area occupied by the circuit board is small, and the circuit board module 18 is close to the first side wall 621 to make up for the defect that the circuit board module 18 is easily unstable when standing. The first side wall 621 and the second side wall 622 are opposite to each other and are located on the left and right sides of the machine head. The battery pack accommodating chamber 63 is adjacent to the second side wall 622. The battery pack accommodating chamber 63, the motor 11, the pressure switch 170, and the circuit board module 18 are distributed in sequence in the left and right directions (including being distributed in sequence from left to right or from right to left). The vertical projections of the battery pack accommodating chamber 63, the motor 11, the pressure switch 170, and the circuit board module 18 on the first plane partially overlap with each other (that is, any two of the vertical projections of the battery pack accommodating chamber 63 on the first plane, the vertical projection of the motor 11 on the first plane, the vertical projection of the pressure switch 170 on the first plane, and the vertical projection of the circuit board module 18 on the first plane are partially overlapped, and the so-called vertical projection on the first plane here is the projection formed by a projection direction perpendicular to the first plane), and the first plane is a vertical plane parallel to the motor shaft 110. The circuit board module 18 comprises a circuit board 180 and a container box 181 which are respectively placed upright. The circuit board 180 is contained in the container box 181. The container box 181 is spaced between the first side wall 621 and the circuit board 180, and the container box 181 is close to the first side wall 621. The container box comprises a rectangular upright main body wall 182 and a rectangular frame 183 extending from four sides of the main body wall. The main body wall 182 faces the circuit board 180, and the frame 183 surrounds the circuit board 180. The circuit board 180 is provided with a control chip, and the control chip adopts the DRV91670 chip of Texas Instruments (TI) of the United States. The first housing 61 is provided with a first stopper 612 extending downward, and the second housing 62 is provided with a second stopper 628 extending upward. The upper part of the circuit board module 18 is sandwiched between the first stopper 612 and the first side wall 621, and the lower part of the circuit board module 18 is sandwiched between the second stopper 628 and the first side wall 621.

[0064] The air compressor also includes a plurality of buffer pads 8 and a plurality of locking members 90 for fixing the bracket 58 relative to the base plate 13. The bracket 58 is provided with a plurality of notches 580, and the notch 580 is provided with a notch 581. The buffer pad 8 includes a first pad 80 and a second pad 81 spaced apart from each other, a through-hole 82 connecting the first pad 80 and the second pad 81, and a through-hole 83 penetrating the first pad 80, the through-hole 82 and the second pad 81. The through-hole 82 is accommodated in the notch 581. The locking member 90 is a screw or a bolt. The locking member 90 is provided with a threaded stud 900, and the stud 900 is inserted into the through-hole 83. The bracket 58 does not contact the locking member 90 and the base plate 13. The buffer pad 8 isolates the locking member 90 from the bracket 58. The second pad 81 is spaced between the notch 580 and the base plate 13. The first pad 80 and the second pad 81 are located on opposite sides of the notch 581 and press against the notch 580. With such a design, the vibration generated by the motor 11 and the pump head 5 during operation is effectively isolated and buffered, thereby effectively suppressing the noise generated by the air compressor during operation. The buffering pad 8 can be made of rubber. The buffering pad 8 is located in the space surrounded by the first shell 61 and the second shell 62. The second shell 62 is fixed to the base plate 13 by a locking member 90. The first pad 80 is pressed downwardly against the upper surface of the notch 580, and the second pad 81 is pressed upwardly against the lower surface of the notch 580.

[0065] The second shell 62 is also provided with a plurality of receiving grooves 623 corresponding to the second pads 81, and a plurality of third through holes 624 penetrating the receiving grooves 623 and corresponding to the through holes 83. The base plate 13 is provided with a plurality of fourth through holes 130 corresponding to the third through holes 624. Each second pad 81 is placed in the corresponding receiving groove 623. The third through hole 624 is located between the through hole 83 and the fourth through hole 130. Each stud 900 penetrates through the through hole 83, the third through hole 624, and the fourth through hole 130. The locking member 90 is also provided with a stud seat 901. The stud 900 extends downward from the stud seat 901. The fourth through hole 130 is provided with an internal thread. The stud 900 penetrates downward into the through hole 83, the third through hole 624, and the fourth through hole 130 in sequence and is screwed and fixed with the internal thread of the fourth through hole 130. The first pad 80 is pressed between the upper surface of the notch 580 and the stud seat 901. The air compressor further includes a plurality of gaskets (not shown) corresponding to the locking elements 90. The gaskets are located between the stud seat 901 and the first pad portion 80. The stud seat 901 presses downward on the gaskets, and the gaskets press downward on the first pad portion 80. Each second pad portion 81 is partially accommodated in the corresponding accommodation groove 623, and each second pad portion 81 is higher than the corresponding accommodation groove 623. Each buffer pad 8 raises the bracket 58, and the bracket 58 does not contact the second housing 62.

[0066] The through hole 83, the third through hole 624, and the fourth through hole 130 are distributed in sequence from top to bottom. The second shell 62 is provided with a convex rib protruding upward. The convex rib is annular and surrounds the accommodating groove 623. The convex rib surrounds the corresponding second pad 81. Each second pad 81 is higher than the corresponding convex rib so that the bracket 58 does not contact the convex rib. The convex rib protrudes away from the base plate 13, and the convex rib surrounds the corresponding second pad portion 81 to limit the corresponding second pad portion 81. The convex rib includes a U-shaped rib position 625 and a straight rib position 626 connecting the opposite ends of the U-shaped rib position 625. The U-shaped rib position 625 and the straight rib position 626 together surround the second pad portion 81. The buffer foot pad 8 is also provided with a U-shaped groove 84 located outside the perforated portion 82 and between the first pad portion 80 and the second pad portion 81. The notch 581 has a U-shaped edge 582, the U-shaped groove 84 matches the U-shaped edge 582, and the notch portion 580 is partially embedded in the U-shaped groove 84.

[0067] The head is also provided with a first noise reduction layer (not shown) attached to the first shell 61 and a second noise reduction layer (not shown) attached to the second shell 62. The first noise reduction layer is located on the inner side of the first shell 61 and the second noise reduction layer is located on the inner side of the second shell 62. The first noise reduction layer and the second noise reduction layer are sponge layers respectively; the second shell 62 is also provided with a bottom wall 627, the first side wall 621 and the second side wall 622 extend upward from the bottom wall 627, and the first side wall 621 and the second side wall 622 are located on the left and right sides of the second shell 62, the first shell 61 is also provided with a top wall 613, a third side wall 614 extending downward, and a fourth side wall 615 extending downward, the third side wall 614 and the fourth side wall 615 extend downward from the top wall 613, and the third side wall 614 and the fourth side wall 615 are located on the left and right sides of the first shell 61, the first noise reduction layer at least covers a portion of the top wall 613, a portion of the third side wall 614 and a portion of the fourth side wall 615, and the second noise reduction layer at least covers a portion of the bottom wall 627, a portion of the first side wall 621 and a portion of the second side wall 622. In order to enhance the noise reduction effect, the larger the area covered by the first noise reduction layer and the second noise reduction layer, the better; in this embodiment, the first noise reduction layer covers more than four fifths of the inner surface of the top wall 613, more than one half of the inner surface of the third side wall 614, and more than one half of the inner surface of the fourth side wall 615, and the second noise reduction layer covers more than four fifths of the inner surface of the bottom wall 627, one half of the inner surface of the first side wall 621, and one half of the inner surface of the second side wall 622. The first noise reduction layer is adhered to the first shell 61 by glue, and the second noise reduction layer is adhered to the second shell 62 by glue. The air compressor of the present application adopts a cushioning foot pad 8 for cushioning and shock absorption, and the motor 11 adopts a lower speed (usually the speed of the air compressor motor 11 is above 3000 revolutions per minute) to reduce vibration and noise, and adopts a first noise reduction layer and a second noise reduction layer for noise reduction, so that the working noise of the air compressor of the present application is low; the working noise of the air compressor is not more than 70 decibels (the working noise is the noise generated when the air compressor works normally, and the noise level is measured based on the common test standard in this field-ISO3744), and the noise value of one embodiment of the air compressor is between 67.5 decibels and 68.5 decibels, about 68 decibels. The speed of the motor 11 is between 1400 and 2400 revolutions per minute, and the speed of the motor 11 of one embodiment of the air compressor is between 1800 and 1900 revolutions per minute, about 1860 revolutions per minute. The first positioning hole 6100 is provided on and penetrates the third side wall 614, and the second positioning hole 6101 is provided on and penetrates the fourth side wall 615. The third side wall 614 is vertically butted with the first side wall 621, and the fourth side wall 615 is vertically butted with the second side wall 622.

[0068] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. An air compressor, comprising a machine head and an air storage tank, characterized in that: The machine head includes a cover shell, a motor, a pump head, and a pressure switch. The cover shell is provided with a battery pack accommodating chamber for loading the battery pack. The pressure switch is located inside the cover shell. The motor and the pump head are respectively placed inside the cover shell. The motor and the pump head are connected together to form two corner spaces located on the left and right sides of the motor. The battery pack accommodating chamber is located on the corner space on one of the left and right sides of the motor. The pressure switch is located on the corner space on the other of the left and right sides of the motor. The pump head is located at the rear of the machine head. The machine head also includes an air filter, which is installed on the pump head. The air filter is located at the Outside the cover, the air filter is inclined downward and rearward and is located on the lower rear side of the cover; the air tank is located below the machine head, and the air filter is located at the angle between the cover and the air tank on the lower rear side of the cover; the machine head also includes a manifold, the manifold is located at the front of the machine head, the motor and the pressure switch are respectively located between the manifold and the pump head, and the manifold and the motor are located on the same side of the left and right sides of the battery pack accommodating cavity; the battery pack accommodating cavity has an opening facing forward for inserting the battery pack, and the opening of the battery pack accommodating cavity and the manifold are arranged on the left and right sides of the front of the machine head.

2. The air compressor according to claim 1, characterized in that: The manifold comprises a first ventilation pipe, a second ventilation pipe, a connecting pipe section for connecting the first ventilation pipe and the second ventilation pipe, and a connecting section connected between the first ventilation pipe and the second ventilation pipe; the first ventilation pipe and the second ventilation pipe are arranged in parallel; the connecting pipe section and the connecting section are both perpendicular to the first ventilation pipe and the second ventilation pipe.

3. The air compressor according to claim 1, characterized in that: The pump head is provided with a cylinder cover, a cylinder, and a piston which can reciprocate left and right in the cylinder to compress the air. The cylinder cover and the cylinder are located in a cover shell. The cylinder cover is provided with an air inlet passage which is located on the rear side thereof and extends obliquely rearward and downward. The air filter is provided with a filter body and a filter outlet port. The filter outlet port is connected to the air inlet passage. The filter outlet port extends obliquely forward and upward. The filter outlet port is perpendicular to the filter body.

4. The air compressor according to claim 1, characterized in that: The manifold comprises a first ventilation pipe and a second ventilation pipe; the axial direction of the motor shaft extends along the front-rear direction, the motor shaft, the first ventilation pipe and the second ventilation pipe are respectively arranged horizontally, and the first ventilation pipe and the second ventilation pipe are respectively perpendicular to the motor shaft.

5. The air compressor according to claim 1, characterized in that: The pump head also includes a small pulley installed on the motor shaft, a belt, a large pulley driven by the small pulley through the belt, an eccentric shaft eccentrically arranged on the large pulley, a connecting rod driven by the eccentric shaft, a cylinder, a cylinder head, and a piston driven by the connecting rod that can reciprocate in the cylinder. The cylinder and the large pulley are located on the left and right sides of the small pulley, and the motor shaft is perpendicular to the connecting rod.

6. The air compressor according to claim 5, characterized in that: The pump head also includes a connecting rod bearing and a radial fan installed on an eccentric shaft. The eccentric shaft is perpendicular to the connecting rod, the inner ring of the connecting rod bearing is fixed to the eccentric shaft, the connecting rod part is located between the large pulley and the radial fan, the radial fan is eccentrically fixed to the eccentric shaft, the radial fan is coaxially arranged with the large pulley, and the cylinder and cylinder head are located in the radial direction of the radial fan.

7. The air compressor according to claim 5, characterized in that: The pump head also includes a connecting rod, a connecting rod bearing, a cylinder, and a piston driven by the connecting rod and capable of reciprocating movement in the cylinder. The connecting rod is provided with a first clamping portion and a second clamping portion, which are respectively located radially outward of an outer ring of the connecting rod bearing. The first clamping portion and the second clamping portion are opposed to each other up and down and clamp and fix the outer ring of the connecting rod bearing.

8. The air compressor according to claim 7, characterized in that: The first clamping portion is provided with a first arc-shaped portion matching the outer ring of the connecting rod bearing, and a first locking portion integrally connected to one end of the first arc-shaped portion, the second clamping portion is provided with a second arc-shaped portion matching the outer ring of the connecting rod bearing, and a second locking portion integrally connected to one end of the second arc-shaped portion, the first arc-shaped portion and the second arc-shaped portion clamp the outer ring of the connecting rod bearing, the first locking portion and the second locking portion are opposite to each other up and down, the first locking portion is provided with a first through hole penetrating the first locking portion, and the second locking portion is provided with a second through hole penetrating the second locking portion, the pump head also includes a first screw, the first screw includes a screw seat and a threaded screw column extending from the screw seat, the first locking portion is located between the screw seat and the second locking portion, the screw column penetrates the first through hole and the second through hole, the first through hole is located between the screw seat and the second through hole, the first through hole is not provided with an internal thread, the first through hole is clearance-matched with the screw column, the second through hole is provided with an internal thread screwed to the screw column, and the screw seat presses the first locking portion toward the second locking portion.

9. The air compressor according to any one of claims 1 to 8, characterized in that: The rated power of the motor is between 100w and 3000w.

10. The air compressor according to claim 1, characterized in that: It also includes a pressure regulating knob, a pressure gauge, and at least one quick connector. The manifold includes a first ventilation pipe, a second ventilation pipe, a connecting pipe section for connecting the first ventilation pipe and the second ventilation pipe, a connecting section connected between the first ventilation pipe and the second ventilation pipe, a first port corresponding to the pressure regulating knob and a second port corresponding to the pressure gauge respectively arranged on the first ventilation pipe, and at least one air outlet port arranged on the second ventilation pipe corresponding to the at least one quick connector one by one. The first ventilation pipe and the second ventilation pipe are parallel, and the connecting pipe section and the connecting section are parallel.

11. The air compressor according to claim 1, characterized in that: The manifold component includes a first ventilation pipe, a second ventilation pipe, and a connecting pipe section for connecting the first ventilation pipe and the second ventilation pipe. The first ventilation pipe and the second ventilation pipe extend in the left-right direction.

12. The air compressor according to claim 10, characterized in that: The air outlet port is perpendicular to the first ventilation pipe and the second ventilation pipe, the first port and the second port are parallel, the first port and the second port are both perpendicular to the first ventilation pipe and the second ventilation pipe, the air outlet port, the first ventilation pipe and the second ventilation pipe are in the same plane, the first port and the second port are perpendicular to the plane, and the connecting pipe section and the connecting section are both perpendicular to the first ventilation pipe and the second ventilation pipe.

13. The air compressor according to claim 1, characterized in that: It also includes a left supporting frame, a right supporting frame, and a handle for the mobile air compressor located above the machine head. The air tank and the machine head are respectively located between the left supporting frame and the right supporting frame. The handle crosses the machine head, and the handle has no contact with the machine head. One end of the handle is fixed to the left supporting frame, and the other end of the handle is fixed to the right supporting frame.

14. The air compressor according to claim 13, characterized in that: The left support frame includes a first cross beam located at the upper part thereof, and the right support frame includes a second cross beam located at the upper part thereof, one end of the handle is locked to the first cross beam, and the other end of the handle is locked to the second cross beam, a first positioning mechanism is provided between the first cross beam and the cover shell, the first positioning mechanism includes a first positioning hole and a first positioning protrusion inserted into the first positioning hole, the first positioning protrusion is provided at one of the first cross beam and the cover shell, the first positioning hole is provided at the other of the first cross beam and the cover shell, a second positioning mechanism is provided between the second cross beam and the cover shell, the second positioning mechanism includes a second positioning hole and a second positioning protrusion inserted into the second positioning hole, the second positioning protrusion is provided at one of the second cross beam and the cover shell, and the second positioning hole is provided at the other of the second cross beam and the cover shell.

15. The air compressor according to claim 1, characterized in that: It also includes an air intake pipeline for fluidly connecting the air storage tank and the pump head. The head also includes a pressure relief device for relieving pressure in the air intake pipeline. The air compressor is powered by a battery pack, the motor is a brushless motor, and the pressure relief device is an electromagnetic valve.

16. The air compressor according to claim 15, characterized in that: The cover shell includes a first shell and a second shell fixed together. The solenoid valve, pressure switch, motor and pump head are located in the space surrounded by the first shell and the second shell. The motor is horizontally placed, suspended in the air and spaced apart from the second shell in the up and down directions, and the solenoid valve is located below the motor.

Images