A rotary pneumatic motor

Abstract

The present invention belongs to the technical field of pneumatic transmission, and particularly relates to a pneumatic motor. A rotary pneumatic motor includes a rotary motor and an air source seat sleeved on the rotary motor. The rotary motor includes a motor end cover and a joint mounting seat fixedly arranged on the motor end cover. The air source seat is provided with a first air vent and a second air vent for air intake or air outlet. A first air passage and a second air passage communicating with the first air vent and the second air vent are respectively formed in the joint mounting seat. Chambers communicating with the first air passage and the second air passage are respectively arranged in the motor end cover, and a pneumatic rotor passing through the motor end cover is arranged in the chambers. By sleeving the air source seat on the rotary motor for combined use, high-pressure compressed air can circulate in and out of the air passages of the rotary motor, and the gas is used to drive the blade rotor to rotate, thereby driving the overall rotation of the rotary motor, thus solving the problem that the utilization rate of the pneumatic motor is very low due to the inability of the pneumatic motor housing to rotate.

Description

Technical Field

[0001] The present invention belongs to the technical field of pneumatic drive, and particularly relates to a pneumatic motor. Background Art

[0002] A pneumatic motor, also known as a pneumatic engine, refers to a device that converts the pressure energy of compressed air into rotational mechanical energy, and is generally used as the rotational power source of a machine or a more complex device. Conventional pneumatic motors can be classified into: vane type pneumatic motor, piston type pneumatic motor, compact vane type pneumatic motor, and compact piston type pneumatic motor according to their structures. Since the vane type pneumatic motor has a wider range of rotational speeds, torques, and powers, it is more commonly used in the market. The vane type pneumatic motor usually intakes air directly from the side of the motor end cover to blow the vanes to rotate. Most of the vane pneumatic motors in the market are restricted by their own structures. Because the motor housing itself cannot rotate, it cannot be used in cooperation with a rotating body, resulting in very low utilization rate. Summary of the Invention

[0003] The purpose of the present invention is to provide a rotary pneumatic motor. By sleeving an air source seat on the rotary motor for cooperation, high-pressure compressed air can circulate in and out of the air channels of the rotary motor, and the gas is used to drive the vane rotor to rotate, thereby driving the overall rotation of the rotary motor, thus solving the problem of very low utilization rate caused by the inability of the pneumatic motor housing to rotate.

[0004] The purpose of the present invention is achieved as follows: A rotary pneumatic motor includes a rotary motor and an air source seat sleeved on the rotary motor. The rotary motor includes a motor end cover and a joint mounting seat fixed on the motor end cover. The air source seat is provided with a first ventilation port and a second ventilation port for air intake or air outlet. A first air channel and a second air channel communicating with the first ventilation port and the second ventilation port are respectively formed in the joint mounting seat. Chambers communicating with the first air channel and the second air channel are respectively provided in the motor end cover, and a pneumatic rotor passing through the motor end cover is provided in the chambers.

[0005] Preferably, ventilation grooves communicating with the first air channel or the second air channel are provided on the chambers.

[0006] Preferably, the first air channel or the second air channel has a longitudinal section and a transverse section extending from the longitudinal section.

[0007] Preferably, the pneumatic rotor includes a rotating body and a plurality of vanes arranged on the periphery of the rotating body. A rotating shaft passing through the motor end cover is provided on the rotating body, and a plurality of vane grooves are formed in the rotating body, and the vanes are arranged in the vane grooves.

[0008] Preferably, a core rod is formed on the joint mounting seat, and the core rod is sleeved in the air source seat. A first sealing chamber and a second sealing chamber are respectively provided between the air source seat and the core rod.

[0009] Preferably, third air vents and fourth air vents communicating with the first air vent and the second air vent are respectively formed on the core rod.

[0010] Preferably, an arc-shaped groove is formed on the cavity.

[0011] Preferably, pipe connectors are respectively installed on the first air vent and the second air vent.

[0012] Preferably, at least one bearing is arranged between the air source seat and the joint mounting seat.

[0013] The prominent and beneficial technical effects of the present invention compared with the prior art are as follows: By sleeving an air source seat on the rotary motor, gas is conveyed through a compressed air pipe and connected to the pipe connector, and when high-pressure compressed air enters the air passage of the rotary motor through the air source seat, the high-pressure compressed air flows in the first air passage or the second air passage and then is transmitted into the cavity, and the gas generates pressure on the blade to drive the blade rotor to rotate, thereby driving the overall rotation of the rotary motor;

[0014] By sleeving the air source seat on the rotary motor and using them in combination, the gas enters and exits from the upper end of the rotary motor. Therefore, the first air vent and the second air vent become the air inlet and outlet ports of the entire rotary pneumatic motor, changing the air inlet mode of the traditional pneumatic motor that directly blows the blade to rotate by entering air from the side of the motor end cover, so that the traditional vane pneumatic motor is no longer limited by its own structure. Thus, the potential energy of the gas driving the blade rotor to rotate in the traditional pneumatic motor is reasonably utilized, and then the overall rotation of the rotary motor is driven, so that the rotating motor on the lathe can be driven by the air source to rotate for processing. Compared with the motor drive with the same function, it is safe in operation, has explosion-proof performance, is not affected by high temperature and vibration at the same time, can work under full load for a long time, and has a small temperature rise, greatly improving the utilization rate of the pneumatic motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of an embodiment of the present invention.

[0016] Figure 2 is a cross-sectional view of an embodiment of the present invention.

[0017] Figure 3 is one of the exploded views of an embodiment of the present invention.

[0018] Figure 4 is the second exploded view of an embodiment of the present invention.

[0019] Figure 5 is a schematic structural diagram of the motor end cover in an embodiment of the present invention.

[0020] Figure 6It is a schematic plan view of the motor end cover in the embodiment of the present invention.

[0021] Figure 7 It is a cross-sectional view showing the first sealing cavity in the embodiment of the present invention.

[0022] Figure 8 It is a schematic cross-sectional view showing the first sealing cavity in the embodiment of the present invention.

[0023] Figure 9 It is a cross-sectional view showing the second sealing cavity in the embodiment of the present invention.

[0024] Reference numerals: 1 - motor end cover; 2 - joint mounting seat; 3 - air source seat; 4 - first air passage; 5 - second air passage; 6 - cavity; 7 - pneumatic rotor; 8 - blade; 9 - rotating body; 10 - ventilation groove; 11 - arc groove; 12 - blade groove; 13 - core rod; 14 - first sealing cavity; 15 - second sealing cavity; 20 - pipe joint; 41 - first ventilation port; 51 - second ventilation port; 61 - third ventilation port; 71 - fourth ventilation port. Detailed implementation manners

[0025] The following further elaborates on the detailed implementation manners of the present invention with reference to the accompanying drawings.

[0026] As Figures 1-9 shown, both the first ventilation port 41 and the second ventilation port 51 adopt large-aperture air intake, significantly increasing the air intake volume to enhance the output power, and the two can be mutually converted, and can be used as both an air intake port and an air outlet, with more convenient operation and strong versatility.

[0027] A rotary pneumatic motor includes a rotary motor and an air source seat 3 sleeved on the rotary motor. The rotary motor includes a motor end cover 1 and a joint mounting seat 2 fixedly arranged on the motor end cover 1. When installed on a lathe for use, the air source seat 3 is fixed and the rotary motor rotates. The air source seat 3 is provided with a first ventilation port 41 and a second ventilation port 51 for air intake or air outlet. The joint mounting seat 2 is respectively formed with a first air passage 4 communicating with the first ventilation port 41; and a second air passage 5 communicating with the second ventilation port 51. The first air passage 4 and the second air passage 5 are arranged oppositely; the air passages are in a longitudinal section and bend and extend from the longitudinal section to a transverse section. The motor end cover 1 is provided with a cavity 6 respectively communicating with the first air passage 4 and the second air passage 5, and a pneumatic rotor 7 passing through the motor end cover 1 is arranged in the cavity 6.

[0028] A plurality of positioning bearings are arranged between the air source seat 3 and the joint mounting seat 2, so that the rotary motor rotates, and the bearings are fixed by a circlip to prevent the rotary motor from falling off when rotating. The circlip is a conventional fixing part, so it is omitted in the drawings.

[0029] Pipeline connectors 20 are respectively installed on the first air vent 41 and the second air vent 51, and the compressed air pipes are respectively inserted into the pipeline connectors 20. An air vent groove 10 communicating with the first air passage 4 and the second air passage 5 is formed on the cavity 6. The air source is input into the first air passage 4 from the first air vent 41, and the gas changes from longitudinal to transverse in the first air passage 4; it is transmitted to the cavity 6 through the air vent groove 10 to blow the blade 7, and the gas rotating in the cavity 6 flows into the second air passage 5 from another air vent groove 10, and the gas changes from transverse to longitudinal in the second air passage 5 until it is discharged from the second air vent 51, and so on in a cycle. The gas generates pressure on the blade 7 and drives the pneumatic rotor 7 to rotate by overcoming a certain amount of frictional force, thereby realizing the rotation of the rotary motor.

[0030] By sleeving the air source base 3 on the rotary motor for combined use, the traditional way of the pneumatic motor that the air directly blows the blade to rotate from the side of the motor end cover is changed, so that the air enters and exits from the upper end of the rotary motor; that is, the end of the core rod 13. Only need to transmit the air through the air vent of the air source base 3 into the rotary motor, and then use the air passage of the pneumatic motor itself to realize the air circulation. Therefore, the first air vent and the second air vent become the air inlet and outlet ports of the whole rotary pneumatic motor, reasonably utilize the potential energy of the air in the pneumatic motor to drive the blade rotor to rotate, and then drive the whole rotary motor to rotate, so that the rotary motor on the lathe can be driven by the air source to rotate for processing. Compared with the motor drive with the same function, it works more safely, has explosion-proof performance, is not affected by high temperature and vibration, can work under full load for a long time, and has a small temperature rise, greatly improving the utilization rate of the pneumatic motor.

[0031] An arc-shaped groove 11 is formed on the cavity 6, and the arc-shaped groove 11 plays a role in guiding the flow. After the vertically flowing gas flows through the arc-shaped groove 11, the flow direction is circular in the cavity 6, driving the pneumatic rotor 7 to make a circular motion in the cavity 6 to maintain stable rotation, echoing the above-mentioned first air passage 4 to form a stable backflow, so that even if a large displacement of gas is input, the overall dynamic balance of the pneumatic motor can be maintained, and the applicable range is wider.

[0032] This practical pneumatic motor is more suitable for use in harsh environments such as high temperature, humidity, and high dust. It has the characteristics of water resistance, moisture-proof, explosion-proof, etc. It works safely, is fire-proof, explosion-proof, and moisture-proof, and is not affected by vibration, high temperature, electromagnetic, radiation, etc. It uses air as the medium, has no difficulty in supply, the used air does not need to be treated, and there is no pollution when discharged into the atmosphere, and it is safe and stable.

[0033] The pneumatic rotor 7 is eccentrically installed. The torque difference generated by the air pressure acting on the blade 8 causes the rotor to rotate counterclockwise. When the eccentric rotor rotates, the volume of the cavity 6 changes, generating a pressure difference on the blade 8 of the adjacent cavity 6. The pressure difference is fully utilized to drive the pneumatic rotor 7 to rotate. The gas after doing work can be discharged from the first air vent 41 or the second air vent 51.

[0034] When the gas enters from the first air vent 41, the gas is discharged from the second air vent 51. When it is necessary to change the rotation direction of the pneumatic rotor 7, only the gas delivery position needs to be changed, that is, it is changed to input from the second air vent 51. At this time, the first air vent 41 becomes the discharge port, thereby changing the input direction of the compressed gas. When the worker operates, only the input position of the gas source needs to be changed to easily control the forward and reverse rotation of the rotor, and the operation is very simple.

[0035] The rotor includes a rotating body 9 and a plurality of blades 8 arranged on the circumferential side of the rotating body 9. A rotating shaft passing through the motor end cover 1 is provided on the rotating body 9. Four blade grooves 12 are symmetrically distributed on the rotating body 9, and the blades 8 are floatingly inserted into the blade grooves 12.

[0036] A core rod 13 is formed on the joint mounting seat 2. The core rod 13 passes through the gas source seat 3. A first sealing cavity 14 and a second sealing cavity 15 are respectively arranged between the gas source seat 3 and the core rod 13. Third air vents 61 and fourth air vents 71 communicating with the first air vent 41 and the second air vent 51 are respectively opened on the core rod 13. When the gas flows into the air passage from the third air vent 61 or the fourth air vent 71, the gas will simultaneously fill the first sealing cavity 14 and the second sealing cavity 15.

[0037] The cavity of the first sealing cavity 14 is annular. The third air vent 61 is arranged on the side wall of the core rod 13 to be rotationally matched with the rotary motor, so that no matter how the rotary motor rotates, the first air vent 41 and the first air passage 4 are always in communication and keep ventilated.

[0038] The fourth air vent 71 is arranged at the upper end of the core rod 13, so that when the gas enters from the second air vent 51, the gas is always in the second sealing cavity 15, so that the gas can only enter the second air passage 5 from the fourth air vent 71. No matter how the rotary motor rotates, the second air vent 51 and the second air passage 5 are always in communication and keep ventilated.

[0039] A plurality of sealing rings are arranged between the gas source seat 3 and the core rod 13, at the upper and lower ends of the first sealing cavity 14, so as to prevent the gas from running out of the first sealing cavity 14 or the second sealing cavity 15 and realize sealing. A plurality of fixing holes are opened on the joint mounting seat 2, and the joint mounting seat 2 is fixedly arranged on the motor end cover 1 through fasteners passing through the fixing holes.

[0040] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A rotary pneumatic motor, characterized in that: It includes a slewing motor and an air source seat (3) sleeved on the slewing motor. The slewing motor includes a motor end cover (1) and a joint mounting seat (2) fixed on the motor end cover (1). The air source seat (3) is provided with a first ventilation port (41) and a second ventilation port (51) for air intake or air outlet. A first air passage (4) and a second air passage (5) communicating with the first ventilation port (41) and the second ventilation port (51) respectively are formed in the joint mounting seat (2). A cavity (6) communicating with the first air passage (4) and the second air passage (5) respectively is provided in the motor end cover (1). An air-operated rotor (7) passing through the motor end cover (1) is provided in the cavity (6). A core rod (13) passing through the air source seat (3) is formed on the joint mounting seat (2). A first sealing cavity (14) and a second sealing cavity (15) are respectively arranged between the air source seat (3) and the core rod (13). A third ventilation port (61) and a fourth ventilation port (71) communicating with the first ventilation port (41) and the second ventilation port (51) respectively are formed on the core rod (13). At least one bearing is arranged between the air source seat (3) and the joint mounting seat (2). Ventilation grooves (10) communicating with the first air passage (4) or the second air passage (5) respectively are formed on the cavity (6). The first air passage (4) or the second air passage (5) has a longitudinal section and extends from the longitudinal section to a transverse section. An arc-shaped groove (11) is formed on the cavity (6).

2. The rotary pneumatic motor according to claim 1, characterized in that: The air-operated rotor (7) includes a rotating body (9) and a plurality of blades (8) arranged on the circumferential side of the rotating body (9). A rotating shaft passing through the motor end cover (1) is provided on the rotating body (9). A plurality of blade grooves (12) are formed on the rotating body (9). The blades (8) are arranged in the blade grooves (12).

3. A rotary pneumatic motor according to claim 1, characterized in that: Pipe joints (20) are respectively arranged on the first ventilation port (41) and the second ventilation port (51).

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