CN214366585U

CN214366585U - Hydraulic air compressor

Info

Publication number: CN214366585U
Application number: CN202022662818.3U
Authority: CN
Inventors: 蔡桂森; 蔡业
Original assignee: Zhejiang Hongzhen Machine Mould Group Co ltd
Current assignee: Zhejiang Hongzhen Machine Mould Group Co ltd
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-10-08
Anticipated expiration: 2030-11-17

Abstract

The utility model relates to a fluid pressure type air compressor machine. The gas production efficiency of the existing hydraulic air compressor is low. The utility model discloses a compression cylinder and drive cylinder, compression cylinder includes the cylinder block and sets up the piston in the cylinder block, drive cylinder sets up on compression cylinder's first end with coaxial mode, and drive cylinder orders about piston along cylinder body axis reciprocating motion to the air that is located the piston both sides in the messenger cylinder block is arranged outside by pressure boost in turn. Through order about the air piston at the hydro-cylinder in the reciprocal translation of cylinder body, the air piston homoenergetic compresses the air at the reciprocating motion in-process for the air is compressed in turn and is arranged outward in cylinder body both ends, effectively utilizes the hydro-cylinder utilization efficiency, and then effectively promotes and produces gas efficiency, promotes and uses experience.

Description

Hydraulic air compressor

Technical Field

The utility model relates to an air compressor machine field, concretely relates to fluid pressure type air compressor machine.

Background

The existing air compressor comprises a compression cylinder and a driving assembly for driving the compression cylinder to operate, the driving assembly is a driving oil cylinder, two ends of the driving oil cylinder are respectively provided with one-way compression cylinders, when the air compressor is used, two ends of an oil piston in the oil cylinder respectively extend outwards and respectively drive the corresponding compression cylinders to alternately compress gas, and the single-side compression cylinder can only produce gas in a single way, so that the utilization efficiency of the single cylinder is low, and the use experience is influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the not enough of prior art, the utility model provides a fluid pressure type air compressor machine through order about the air piston at the hydro-cylinder in the reciprocal translation of cylinder body for the air is arranged outward by the compression in turn in the cylinder body both ends, effectively utilizes the hydro-cylinder utilization efficiency, and then effectively promotes and produces gas efficiency, promotes to use and experiences.

The utility model discloses a following mode realizes: the utility model provides a hydraulic air compressor machine, includes compression cylinder and drive cylinder, compression cylinder includes the cylinder block and sets up the air piston in the cylinder block, drive cylinder sets up on compression cylinder's first end with coaxial mode, and drive cylinder orders about air piston along cylinder block axis reciprocating motion to the air that is located the air piston both sides in the cylinder block is arranged outward by the pressure boost in turn. Through order about the air piston at the hydro-cylinder in the reciprocal translation of cylinder body, the air piston homoenergetic compresses the air at the reciprocating motion in-process for the air is compressed in turn and is arranged outward in cylinder body both ends, effectively utilizes the hydro-cylinder utilization efficiency, and then effectively promotes and produces gas efficiency, promotes and uses experience.

Preferably, the two end portions of the cylinder block are respectively provided with a ventilation assembly, the ventilation assemblies comprise an air inlet pipe and an air outlet pipe, and the unit cavities in the cylinder block, which are positioned at the two sides of the air piston, obtain an air source through the air inlet pipe and are discharged outside through the air outlet pipe after being compressed. The unit cavity spaces in the two end parts of the cylinder body can be alternately increased and decreased due to the reciprocating movement and the alternate increase and decrease of the air piston, so that the air source is alternately obtained and the air source is compressed to be discharged, and the gas production efficiency is effectively improved.

Preferably, the air inlet pipe is provided with a one-way valve for limiting the air flow in the unit cavity to be discharged outwards, and the air outlet pipe is provided with a one-way valve for limiting the air flow to flow back to the unit cavity. The air is guided to flow along a preset path by arranging the one-way valves on the air inlet pipe and the air outlet pipe, so that the unit cavity can obtain an air source from a low-pressure space and input into a high-pressure space after pressurization.

Preferably, the breather assembly is provided on an end surface of the cylinder block such that the air piston is reciprocally movable between the end surfaces of the cylinder block. The air inlet pipe and the exhaust pipe are arranged on the end face of the cylinder body, the air in the unit cavity is effectively discharged outwards to ensure that the air piston can be tightly attached to the end face of the cylinder body, so that the moving distance of the air piston in the cylinder body is increased, and the air yield of the single movement of the compression cylinder is improved by reducing the volume change lower limit of the unit cavity.

Preferably, the air inlet pipe of one unit cavity is communicated with the air outlet pipe of the other unit cavity, and the air outlet pipe is communicated with an external storage tank. A unit chamber in the compression cylinder carries out first pressure boost operation through obtaining air in the external space to carry out second pressure boost operation in the compressed air input second unit intracavity that produces, effectively promote the output airflow pressure of air compressor machine, and then promote and use experience.

Preferably, the driving oil cylinder comprises an oil cylinder body and an oil piston capable of performing reciprocating translation along the axis of the oil cylinder body, and the oil piston drives the air piston to synchronously link through a transmission rod. The oil piston and the gas piston are linked through the transmission rod, and the axes of the transmission rod, the oil cylinder body and the cylinder body are mutually overlapped, so that the transmission rod can be ensured to transmit stably, the sealing performance between the transmission rod and the oil cylinder body and the cylinder body can be improved by reducing the radial deviation of the transmission rod during axial movement, the situations of oil leakage and gas leakage are prevented, and the gas production efficiency is ensured.

Preferably, one end of the transmission rod is fixedly connected to the middle of the oil piston, and the other end of the transmission rod sequentially penetrates through the side end face of the oil cylinder body facing the side end face of the cylinder body and then is fixedly connected with the middle of the air piston. The two ends of the transmission rod are respectively and fixedly connected between the middle parts of the oil piston and the air piston, and acting force can be transmitted along the axis direction of the transmission rod, so that the condition that the transmission rod is radially deviated is effectively prevented, and the sealing performance of the driving oil cylinder and the compression air cylinder during working is ensured.

Preferably, through holes are formed in the end face, facing the side of the cylinder body, of the oil cylinder body and in the middle of the end face, facing the side of the oil cylinder body, and a sealing ring tightly attached to the outer side wall of the transmission rod is arranged on the inner side wall of each through hole; the periphery of the oil piston is provided with a sealing ring which is tightly attached to the inner peripheral wall of the oil cylinder body; the periphery of the air piston is provided with a sealing ring which is tightly attached to the inner peripheral wall of the cylinder body. The sealing rings are arranged among the related components, so that the components can move relatively, oil leakage, air leakage and the like can be effectively prevented, and the working efficiency is ensured.

Preferably, the air compressor comprises a control assembly, the control assembly comprises a trigger rod linked with the air piston and a trigger switch matched with the trigger rod, and the control assembly senses the displacement of the trigger rod through the trigger switch and controls the oil piston to reciprocate. The control assembly senses the position of the trigger rod through the trigger switch, and then controls the movement direction and the steering position of the air piston through the driving oil cylinder, so that the pressure of the discharged gas can be effectively ensured to meet the use requirement, the condition that the air piston is excessively displaced can be effectively prevented, and the use safety of equipment is ensured.

Preferably, the diameter of the cylinder body is larger than that of the oil cylinder body, one end of the trigger rod is fixedly connected to the periphery of the air piston, the other end of the trigger rod penetrates through the end face of the cylinder body and is exposed, and the trigger switch on the outer side wall of the oil cylinder body is matched with the trigger rod and the trigger switch in linkage with the air piston to control the motion state of the oil cylinder. Set up the cylinder block and the oil cylinder body of differentiation diameter, can improve gas production efficiency through the increase cylinder block diameter, can also reduce equipment cost and use cost through reducing oil cylinder body diameter. The axial projection of the periphery of the end face of the cylinder body and the end face of the oil cylinder body are arranged in a staggered mode, a telescopic moving space is provided for the trigger rod, the trigger switch is arranged through exposure to conveniently adjust the position, gas production parameters of the air compressor are adjusted, and use experience is improved.

Preferably, the periphery of the end face of the cylinder block facing the cylinder body side is provided with a through hole, and the trigger rod is movably inserted in the through hole so as to be capable of being linked with the air piston along the axial direction of the cylinder block. The trigger bar is movable along the perforations and ensures that air in the corresponding cell cavity does not escape through the perforations.

The utility model has the advantages that: through order about the air piston at the hydro-cylinder in the reciprocal translation of cylinder body, the air piston homoenergetic compresses the air at the reciprocating motion in-process for the air is compressed in turn and is arranged outward in cylinder body both ends, effectively utilizes the hydro-cylinder utilization efficiency, and then effectively promotes and produces gas efficiency, promotes and uses experience.

Drawings

Fig. 1 is a schematic cross-sectional view of an air compressor according to a first embodiment;

fig. 2 is a schematic structural diagram of the air compressor according to the first embodiment;

fig. 3 is a schematic view of another perspective structure of the air compressor according to the first embodiment;

FIG. 4 is a schematic view of the pipeline connection of the air compressor according to the first embodiment;

FIG. 5 is a schematic cross-sectional view of the air compressor in the extended position according to the first embodiment;

fig. 6 is a schematic structural diagram of the air compressor according to the first embodiment;

FIG. 7 is a schematic view of the line connection of the air compressor according to the second embodiment;

in the figure: 1. the device comprises a compression cylinder, 2 a driving oil cylinder, 3 a cylinder body, 4 a gas piston, 5 a gas inlet pipe, 6 a gas exhaust pipe, 7 a one-way valve, 8 a cylinder body, 9 a oil piston, 10 a trigger rod, 11 a trigger switch, 12 a storage tank, 13 and a transmission rod.

Detailed Description

The essential features of the invention will be further explained below with reference to the drawings and the detailed description of the invention.

The first embodiment is as follows:

this embodiment provides a hydraulic air compressor machine.

The hydraulic air compressor shown in fig. 1 is composed of a compression cylinder 1 and a driving cylinder 2, wherein the compression cylinder 1 comprises a cylinder block 3 and an air piston 4 arranged in the cylinder block 3, the driving cylinder 2 is coaxially arranged on a first end portion of the compression cylinder 1, and the driving cylinder 2 drives the air piston 4 to reciprocate along the axis of the cylinder block 3, so that air at two sides of the air piston 4 in the cylinder block 3 is alternately pressurized and discharged. The air piston 4 driven by the driving oil cylinder 2 can reciprocate in the cylinder body 3 and alternatively compress air in two end parts of the cylinder body 3, so that high-pressure air which is continuously conveyed outwards is formed, the driving oil cylinder 2 can generate high-pressure air through the compression cylinder 1 when stretching and retracting, and the gas production efficiency of the air compressor is improved.

In this embodiment, the air compressor includes a driving cylinder 2 and a compression cylinder 1 (as shown in fig. 2 and 3), and the driving cylinder 2 and the compression cylinder 1 are fixedly connected in a coaxial manner, so that the assembly efficiency is improved and the production cost is reduced by simplifying the structure.

In this embodiment, the inner cavity of the cylinder block 3 is divided into two unit cavities by the air piston 4, the sum of the volumes of the two unit cavities is ensured to be constant, and the volumes of the two unit cavities are adjusted by the movement of the air piston 4, so that the air in the unit cavities can be compressed to form high-pressure air.

Specifically, two unit cavities are set as a first cavity and a second cavity respectively, when the device is in an initial state, the driving oil cylinder 2 is located at a contraction station, at the moment, the first cavity is located at a lower volume limit, the second cavity is located at an upper volume limit, and the operation is realized through the following steps:

firstly, the driving oil cylinder 2 is switched from a contraction station to an outward extension station and pushes the air piston 4 to move synchronously, in the process, the volume of a first cavity is gradually increased and air in the external space is extracted through the corresponding air inlet pipe 5, the volume of a second cavity is gradually reduced, and the air in the second cavity is compressed and pressurized and then is discharged into the storage tank 12 through the corresponding air outlet pipe 6;

then, the driving oil cylinder 2 is switched to an outward-extending working position (as shown in fig. 5), at this time, the first cavity is at the upper volume limit, the second cavity is at the lower volume limit, and the high-pressure air in the second cavity is completely discharged into the storage tank 12;

and finally, the driving oil cylinder 2 is switched from the outward extending station to the contraction station and pushes the air piston 4 to move synchronously, in the process, the volume of the second chamber is gradually increased and air in the external space is extracted through the corresponding air inlet pipe 5, the volume of the first chamber is gradually reduced, and the air in the first chamber is compressed and pressurized and then is discharged into the storage tank 12 through the corresponding exhaust pipe 6.

Through above-mentioned process back, the air compressor machine returns to initial condition again, guarantees through carrying out the repetitive operation to above-mentioned step that the air compressor machine lasts outside transport highly-compressed air for actuating cylinder 2 homoenergetic produces highly-compressed air through the unit chamber that corresponds when reciprocating between shrink station and overhanging station, effectively promotes highly-compressed air output, promotes the utilization efficiency of air compressor machine.

In this embodiment, when the volume of the unit chamber changes from the lower limit value to the upper limit value, the air pressure in the unit chamber is lower than the external atmospheric pressure due to the increase of the volume of the unit chamber, so that the unit chamber can use the low-pressure environment in the unit chamber to draw air in the external space through the air inlet pipe 5, thereby obtaining the air source required for compressing the air. Meanwhile, when the volume of the unit cavity is reduced, the check valve 7 is arranged on the air inlet pipe 5, so that gas in the unit cavity cannot be discharged outside through the air inlet pipe 5, and high-pressure air formed by compression can be input into the tank body through the air outlet pipe 6 for storage for subsequent use.

In this embodiment, the unit cavity is connected to the storage tank 12 through the exhaust pipe 6, and the pressure of the high-pressure air discharged from the unit cavity rises synchronously with the rise of the pressure in the storage tank 12. Specifically, when the air compressor machine starts, the internal air pressure of storage tank 12 is the same with external atmospheric pressure, at this moment, the unit cavity volume diminishes and makes its internal air pressure rise, when the internal air pressure of unit cavity is greater than the internal air pressure of storage tank 12, the internal air of unit cavity can pass through blast pipe 6 input storage tank 12, the invariable storage tank 12 of volume can be because of the condition that the internal gas pressure of unit cavity takes place the atmospheric pressure increase after the input, through the gas transmission back of reciprocating many times, the internal air pressure of storage tank 12 can rise gradually, make the internal air of unit cavity need be compressed earlier to the parameter state that is higher than the internal air pressure of storage tank 12 and just can promote check valve 7 on the blast pipe 6 and input storage tank 12, ensure that storage tank 12 can obtain the air pressure that satisfies the operation requirement from this. The exhaust pipe 6 is provided with the one-way valve 7, so that the gas in the storage tank 12 cannot flow back to the unit cavity, and the storage tank 12 is ensured to play a role in accumulating pressure and storing pressure gas.

In the present embodiment, ventilation assemblies are disposed on both ends of the cylinder block 3, the ventilation assemblies include an intake pipe 5 and an exhaust pipe 6, and the unit cavities in the cylinder block 3 located on both sides of the air piston 4 obtain an air source through the intake pipe 5 and are discharged outside through the exhaust pipe 6 after being compressed (as shown in fig. 4). Specifically, one end of the air inlet pipe 5 is communicated with the corresponding unit cavity, and the other end of the air inlet pipe is communicated with the external space, so that the unit cavity can conveniently obtain an air source by increasing the volume. One end of the exhaust pipe 6 is communicated with the corresponding unit cavity, and the other end of the exhaust pipe is communicated with the storage tank 12, so that compressed air can be conveniently input into the storage tank 12 by the unit cavity and stored.

In this embodiment, the air inlet pipe 5 is provided with a check valve 7 for limiting the outward discharge of the air flow in the unit cavity, and the air outlet pipe 6 is provided with a check valve 7 for limiting the air flow to flow back to the unit cavity. The air flow direction in the air inlet pipe 5 and the air outlet pipe 6 is ensured to be controllable by arranging the check valve 7, so that the compression cylinder 1 is ensured to obtain an air source through the air inlet pipe 5 and discharge high-pressure air through the air outlet pipe 6.

In the present embodiment, the breather assembly is provided on an end surface of the cylinder block 3 so that the air piston 4 can reciprocate between both end surfaces of the cylinder block 3. The ventilation assembly is arranged in a staggered manner with respect to the transmission rod 13, so that the transmission rod 13 is ensured to move back and forth along the axial direction thereof.

In the embodiment, the driving cylinder 2 comprises a cylinder body 8 and an oil piston 9 capable of reciprocating and translating along the axis of the cylinder body 8, and the oil piston 9 drives the air piston 4 to synchronously link through a transmission rod 13. The transmission rod 13 is used for transmitting the driving force generated by the oil piston 9, so that the air pistons 4 can be synchronously linked. Specifically, one end of the transmission rod 13 is fixedly connected to the middle of the oil piston 9, and the other end of the transmission rod passes through the end surface of the oil cylinder block 8 facing the side of the cylinder block 3, and the cylinder block 3 faces the end surface of the oil cylinder block 8 and then is fixedly connected to the middle of the air piston 4. One end of the transmission rod 13 is inserted in the cylinder body 3, the other end of the transmission rod is inserted in the oil cylinder body 8, the reciprocating movement of the air piston 4 is realized through the reciprocating movement of the transmission rod 13, and then the compression cylinder 1 is ensured to generate high-pressure air smoothly.

In this embodiment, the through-hole is all seted up towards the middle part of 3 side end faces of cylinder block and the cylinder block 3 towards 8 side end faces of cylinder block to the cylinder block 8, be equipped with the sealing washer with the 13 lateral walls of transfer line inseparable laminating on the through-hole inside wall, oil piston 9 periphery is equipped with the sealing washer with the inseparable laminating of 8 internal perisporium of cylinder block, the periphery of air piston 4 is equipped with the sealing washer with the inseparable laminating of 3 internal perisporium of cylinder block. Promote the leak protection performance through set up the sealing washer that closely laminates with the transfer line 13 lateral wall on the through-hole inside wall, both let out through preventing that fluid from guaranteeing that oil piston 9 can export effectual drive power, still let out through preventing the air and guarantee that air piston 4 can effective compressed air. In addition, the cylinder block 3 is provided with a through hole at the end face periphery facing the cylinder block 8 side, the trigger rod 10 is movably inserted in the through hole so that the trigger rod 10 can be linked with the air piston 4 along the axis direction of the cylinder block 3, and a sealing ring is arranged at the inner edge of the through hole to effectively seal a gap between the through hole and the trigger rod 10.

In this embodiment, the air compressor machine includes the control assembly, the control assembly includes trigger lever 10 with air piston 4 linkage and trigger switch 11 with trigger lever 10 complex, the control assembly perceives trigger lever 10 displacement and control oil piston 9 reciprocating motion through trigger switch 11. One end of the trigger rod 10 is fixedly connected to the periphery of the air piston 4, the other end of the trigger rod penetrates through the end face of the cylinder body 3 and is exposed, and the trigger switch 11 on the outer side wall of the oil cylinder body 8 is matched with the trigger rod 10 and the trigger switch 11 which are linked with the air piston 4 so as to control the motion state of the oil cylinder. The gas piston type gas generating device is characterized in that the number of the trigger switches 11 is two, the trigger rod 10 is provided with a trigger part, the distance between the trigger switches 11 is the same as the preset moving distance of the gas piston 4, when the gas piston type gas generating device is used, the trigger part can move synchronously with the gas piston 4 through the trigger rod 10, when the gas piston 4 moves to the preset limit position, the trigger part can trigger the corresponding trigger switch 11, the control assembly receives a signal from the trigger switch 11 and controls the oil piston 9 in the driving oil cylinder 2 to move in a steering mode, equipment safety is guaranteed, and the gas piston 4 is guaranteed to realize continuous gas generation through reciprocating movement.

In this embodiment, the diameter of cylinder block 3 is greater than the diameter of cylinder block 8, and because the drive power that the hydro-cylinder produced is great, reduces the diameter of cylinder block 8, can effectively reduce fluid use amount, reduces the use cost of actuating cylinder 2, can also increase the air volume of compression cylinder 1 single processing, promotes machining efficiency.

In this embodiment, the trigger lever 10 is disposed on the cylinder block back to the cylinder block side (as shown in fig. 6) or disposed on the cylinder block back to the cylinder block side, and the trigger switch is fixed through the bracket, so as to ensure the trigger lever to be accurately linked with the cylinder block, and then accurately control the movement of the cylinder block, which should also be regarded as a specific embodiment of the present invention.

Example two:

compared with the first embodiment, the present embodiment provides another air compressor structure.

As shown in fig. 7, the air inlet pipe 5 of the unit chamber is communicated with the air outlet pipe 6 of another unit chamber, and the air outlet pipe 6 is communicated with the external storage tank 12. Specifically, the unit cavity comprises a first cavity and a second cavity, an air inlet pipe 5 of the first cavity is communicated with the external space, an exhaust pipe 6 is communicated with the air inlet pipe 5 of the second cavity, and the exhaust pipe 6 of the second cavity is communicated with a storage tank 12.

When the air-suction type air-suction device is used, firstly, the volume of the first cavity is increased, and outside air is sucked through the air inlet pipe 5; then, the volume of the first cavity is reduced, the volume of the second cavity is increased, and the compressed air in the first cavity is input into the second cavity; and finally, the volume of the second cavity is reduced, and the compressed air is input into the storage tank 12 after secondary compression.

In this embodiment, a buffer tank may be further disposed between the exhaust pipe 6 of the first chamber and the intake pipe 5 of the second chamber, so as to effectively eliminate turbulence generated by mutual communication between the first chamber and the second chamber.

Other structures and effects of the air compressor are consistent with the embodiment, and are not repeated.

Claims

1. The utility model provides a hydraulic air compressor machine, includes compression cylinder (1) and drive cylinder (2), compression cylinder (1) includes cylinder block (3) and sets up air piston (4) in cylinder block (3), its characterized in that, drive cylinder (2) set up on the first end of compression cylinder (1) with coaxial mode, and drive cylinder (2) order about air piston (4) along cylinder block (3) axis reciprocating motion to the air that is located air piston (4) both sides in messenger cylinder block (3) is arranged outward by the pressure boost in turn.

2. The hydraulic air compressor according to claim 1, wherein each of the two ends of the cylinder block (3) is provided with a ventilation assembly, the ventilation assembly comprises an air inlet pipe (5) and an air outlet pipe (6), and the unit cavities in the cylinder block (3) located on the two sides of the air piston (4) obtain an air source through the air inlet pipe (5) and are discharged outside through the air outlet pipe (6) after being compressed.

3. The hydraulic air compressor as claimed in claim 2, wherein the air inlet pipe (5) is provided with a check valve (7) for restricting the outward discharge of air flow in the unit cavity; or a check valve (7) for limiting air flow to flow back to the unit cavity is arranged on the exhaust pipe (6).

4. The hydraulic air compressor as claimed in claim 2, wherein the breather assembly is provided on an end surface of the cylinder block (3) to allow the air piston (4) to reciprocate between the end surfaces of the cylinder block (3); or the air inlet pipe (5) of the unit cavity is communicated with the exhaust pipe (6) of the other unit cavity, and the exhaust pipe (6) is communicated with the external storage tank (12).

5. The hydraulic air compressor as claimed in claim 1, wherein the driving cylinder (2) includes a cylinder body (8) and an oil piston (9) capable of reciprocating and translating along the axis of the cylinder body (8), and the oil piston (9) drives the air piston (4) to synchronously link through a transmission rod (13).

6. The hydraulic air compressor as claimed in claim 5, wherein one end of the transmission rod (13) is fixedly connected to the middle of the oil piston (9), and the other end of the transmission rod passes through the end surface of the oil cylinder (8) facing the side of the cylinder block (3) and the end surface of the cylinder block (3) facing the side of the oil cylinder (8) in sequence and then is fixedly connected to the middle of the air piston (4).

7. The hydraulic air compressor as claimed in claim 5, wherein a through hole is formed in the end surface of the cylinder block (8) facing the cylinder block (3) and in the middle of the end surface of the cylinder block (3) facing the cylinder block (8), and a sealing ring closely attached to the outer side wall of the transmission rod is arranged on the inner side wall of the through hole; or the periphery of the oil piston (9) is provided with a sealing ring which is tightly attached to the inner peripheral wall of the oil cylinder body (8); or the periphery of the air piston (4) is provided with a sealing ring which is tightly attached to the inner peripheral wall of the cylinder body (3).

8. The hydraulic air compressor as claimed in any one of claims 1-7, wherein the air compressor includes a control assembly, the control assembly includes a trigger lever (10) linked with the air piston (4) and a trigger switch (11) engaged with the trigger lever (10), and the control assembly senses the displacement of the trigger lever (10) through the trigger switch (11) and controls the oil piston (9) to reciprocate.

9. The hydraulic air compressor as claimed in claim 8, wherein the diameter of the cylinder block (3) is greater than that of the cylinder block (8), one end of the trigger rod (10) is fixedly connected to the periphery of the air piston (4), the other end of the trigger rod penetrates through the end face of the cylinder block (3) and is exposed, and the trigger switch (11) on the outer side wall of the cylinder block (8) is matched with the trigger rod (10) linked with the air piston (4) to control the movement state of the cylinder.

10. The hydraulic air compressor as claimed in claim 8, wherein the cylinder block (3) has a through hole at the periphery of its end surface facing the cylinder block (8), and the triggering rod (10) is movably inserted in the through hole so that the triggering rod (10) can be linked with the air piston (4) along the axial direction of the cylinder block (3).