CN210217841U

CN210217841U - Pneumatic motor

Info

Publication number: CN210217841U
Application number: CN201921122434.3U
Authority: CN
Inventors: Xindian Gu; 顾新钿
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-17
Filing date: 2019-07-17
Publication date: 2020-03-31
Anticipated expiration: 2029-07-17

Abstract

The embodiment of the utility model discloses pneumatic motor relates to power equipment technical field, which comprises a housin, the rotor, cylinder body and oar pole, the rotor includes two intervals and parallel arrangement's cylinder cap, be provided with support piece between two cylinder caps, the center of cylinder cap is provided with perpendicular output shaft outwards, the cylinder cap edge is provided with a plurality of leading holes of wearing, the cylinder body is provided with the shaft hole corresponding with the output shaft, the cylinder body is provided with the air current groove inwards of outside protrusion and opening, the degree of depth gradual change from the both ends of air current groove to middle part deepens, the cylinder body is provided with first gas pocket and the exhaust hole that feeds through with the air current groove, first gas pocket is located the one end of air current groove, the exhaust hole is located the middle part of air current groove, the oar. The pneumatic motor provided by the embodiment of the utility model has simple working condition, and the conditions of poor sealing or failure and even incapability of starting can not occur; and the output torque and the rotating speed are stable.

Description

Pneumatic motor

Technical Field

The embodiment of the utility model provides a relate to power equipment technical field, concretely relates to pneumatic motor.

Background

A pneumatic motor, also known as a pneumatic motor, is a device that converts the pressure energy of compressed air into rotational mechanical energy, and is generally used as a rotary power source for more complex devices or machines. The existing pneumatic motor is divided into a vane type pneumatic motor and a piston type pneumatic motor according to the structure.

When the vane type pneumatic motor is ventilated, a small part of gas acts on the bottom of the vane through the vent hole at the bottom of the vane slot, so that the vane is popped up and pressed on the wall of the stator cavity; some have springs at the bottom of the blade slots to urge the blades to eject. When the stator is rotated, the blades are tightly pressed on the wall of the stator cavity under the action of centrifugal force to form sealing. The vanes are quick-wear parts, and the working conditions of the vanes are complex, so that the situation that one or more vanes cannot be completely ejected is easy to occur, the sealing is poor or invalid, and the output torque is unstable, the rotating speed is unstable, and even the starting cannot be performed.

The piston type pneumatic motor has a complex structure and is difficult to maintain, and the rotating speed of the piston type pneumatic motor cannot be very high due to reciprocating motion, so that the comprehensive output horsepower is small even if the torque of the piston type pneumatic motor is large.

SUMMERY OF THE UTILITY MODEL

Therefore, the embodiment of the utility model provides a pneumatic motor to solve among the prior art because the output torque that the blade operating mode is complicated and lead to is unstable, the rotational speed is unstable, the problem that can't start even.

In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:

according to a first aspect of embodiments of the present invention, a pneumatic motor, comprising:

the shell is of a cylindrical structure with openings at the upper end and the lower end;

the rotor comprises two cylinder covers which are arranged at intervals in parallel, a supporting piece is arranged between the two cylinder covers, an output shaft which faces outwards perpendicularly is arranged in the center of each cylinder cover, a plurality of penetrating holes are formed in the edges of the cylinder covers and distributed along the circumferential direction of the output shaft, and the penetrating holes of the two cylinder covers are equal in number and same in position;

the cylinder body is provided with a shaft hole corresponding to the output shaft, the cylinder body is provided with an end face used for abutting against the cylinder cover, the cylinder body is provided with an airflow groove protruding outwards and having an inward opening, the airflow groove is arc-shaped when viewed from top, a space is arranged between two ends of the airflow groove, a part of the end face used for abutting against the cylinder cover is arranged between the two ends of the airflow groove, the depth of the airflow groove gradually increases from the two ends to the middle of the airflow groove, the cylinder body is provided with a first air hole and an exhaust hole, the first air hole is communicated with the airflow groove, the first air hole is located at one end of the airflow groove, and the exhaust hole is located in the middle of the airflow groove;

the paddle rod is slidably arranged in the through hole;

the two cylinder bodies are detachably connected to the upper end and the lower end of the shell respectively, the two cylinder bodies rotate 180 degrees relative to the central axis of the shell, the rotor is arranged in the shell, the output shaft is rotatably arranged in the shaft hole in a penetrating mode, the cylinder cover is in contact with the end face of the cylinder body and is sealed, the distance between the two ends of the airflow groove is larger than the inner diameter of the penetrating hole, the paddle rod is sealed with the penetrating hole, and when the end portion of the paddle rod is located in the airflow groove, the end portion of the paddle rod is sealed with the airflow groove.

Furthermore, the support piece comprises a hollow connecting column, the inner diameter of the connecting column is larger than or equal to the aperture of the through hole, and two ends of the connecting column are respectively fixed on the periphery of two through holes with the same position.

Furthermore, the connecting column is provided with a slide way, the slide way is arranged along the length direction of the connecting column, the paddle rod is positioned in the connecting column, a slide block is detachably arranged on the paddle rod, and the slide block slides along the slide way.

Further, the cylinder body is provided with a second air hole communicated with the airflow groove, and the second air hole is located at one end, far away from the first air hole, of the airflow groove.

Further, a pneumatic interface is provided at the first air hole and/or the second air hole.

Further, the cylinder cover and the cylinder body are sealed by a labyrinth seal or a sealing sheet.

Further, bearings are arranged at two ends of the shaft hole, and the output shaft and the shaft hole are fixed through the bearings.

Further, the exhaust hole is equipped with a plurality ofly, a plurality of the exhaust hole interval sets up.

Further, the exhaust hole is a slit-shaped hole.

Further, a plurality of the through holes are evenly distributed along the circumferential direction of the output shaft.

The embodiment of the utility model provides a have following advantage:

the embodiment of the utility model provides a pneumatic motor, the one end of every oar pole can force the other end to hug closely the tank bottom of the air current groove of opposite side under the tank bottom effect of the air current groove of homonymy, guarantees the sealed of oar pole and air current groove constantly to make the output shaft can last, steady rotation, guarantee the stability of output torque and rotational speed, the operating mode is simple, can not appear sealed variation or inefficacy, the unable condition of starting even.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

Fig. 1 is a schematic structural diagram of an air motor provided in embodiment 1 of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 with the housing removed;

FIG. 3 is a schematic view of the cylinder of FIG. 2 with the upper cylinder removed;

FIG. 4 is a schematic view of the cylinder of FIG. 3 with the lower cylinder removed;

FIG. 5 is a schematic view of a rotor structure;

FIG. 6 is a schematic structural view (perspective view) of the cylinder;

FIG. 7 is a schematic structural view (top view) of the cylinder;

fig. 8 is a schematic structural view of the paddle lever.

In the figure: 1-housing, 11-lug;

2-rotor, 21-cylinder cover, 22-output shaft, 23-threading hole, 24-connecting column and 25-slideway;

3-cylinder body, 31-shaft hole, 32-airflow groove, 33-first air hole, 34-second air hole, 35-exhaust hole and 36-end surface;

4-paddle rod, 41-paddle blade, 42-slider.

Detailed Description

The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.

Example 1

As shown in fig. 1 to 8, embodiment 1 provides an air motor including a housing 1, a rotor 2, two cylinders 3, and a plurality of paddle levers 4.

The housing 1 has a cylindrical structure with an open upper end and a lower end, such as a cylindrical structure. The outer side of the upper and lower ends of the housing 1 is provided with lugs 11 for connecting the cylinder 3. The lugs 11 are uniformly arranged in plurality so as to ensure that the cylinder 3 is stably and reliably connected with the shell 1.

The rotor 2 comprises two cylinder heads 21 and several supports. The cylinder cover 21 is disc-shaped, and the two cylinder covers 21 are arranged at intervals and in parallel. The center of the cylinder cover 21 is provided with an output shaft 22 which faces outwards vertically, wherein vertically means that the output shaft 22 is perpendicular to the surface of the cylinder cover 21; outward means that the output shaft 22 is away from the space between the two cylinder heads 21. The edge of the cylinder cover 21 is provided with a plurality of penetrating holes 23, and the plurality of penetrating holes 23 are uniformly distributed along the circumferential direction of the output shaft 22. The same number and same positions of the insertion holes 23 of the two cylinder heads 21 mean that, if the two cylinder heads 21 overlap, the insertion holes 23 of the two cylinder heads 21 also completely overlap, and the insertion holes 23 at the same positions are regarded as a pair. The support is arranged between the two cylinder heads 21 so that there is a certain space between the two cylinder heads 21. The support piece comprises a hollow connecting column 24, the inner diameter of the connecting column 24 is larger than or equal to the aperture of the penetrating hole 23, the connecting column 24 is perpendicular to the two parallel cylinder covers 21, two ends of the connecting column 24 are respectively fixed on the peripheries of the two penetrating holes 23 in the same position, namely, the axis of the connecting column 24 is collinear with the axis of the penetrating hole 23, and the end part of the connecting column 24 is fixed on the periphery of the penetrating hole 23. In this embodiment, the connecting column 24 has a C-shaped cross-section, and the C-shaped opening forms a slideway 25 along the length of the connecting column 24.

The cylinder block 3 is provided with a shaft hole 31 corresponding to the output shaft 22, and bearings are provided at both ends of the shaft hole 31. The cylinder body 3 is provided with an end face 36 for abutting against the cylinder cover 21, and is further provided with an airflow groove 32 protruding outwards and having an inward opening, the top view of the airflow groove 32 is arc-shaped, a space is arranged between two ends of the airflow groove 32, and a part of the end face 36 for abutting against the cylinder cover 21 is arranged between two ends of the airflow groove 32, wherein outwards refers to a direction away from the cylinder cover 21 of the rotor 2, and inwards refers to a direction towards the cylinder cover 21 of the rotor 2. The depth of the airflow groove 32 gradually increases from the two ends to the middle part, the cylinder 3 is provided with a first air hole 33, a second air hole 34 and an exhaust hole 35 which are communicated with the airflow groove 32, the first air hole 33 is positioned at one end of the airflow groove 32, the second air hole 34 is positioned at the other end of the airflow groove 32, and a pneumatic interface is arranged at the first air hole 33 and/or the second air hole 34. The exhaust hole 35 is located at the middle of the airflow groove 32. A plurality of exhaust holes 35 can be arranged, and the exhaust holes 35 are arranged at intervals; one may be provided. The exhaust holes 35 may be circular holes or slit-like holes, that is, long and narrow holes.

The paddle rods 4 are slidably arranged in the through holes 23, and only one paddle rod 4 is arranged in each through hole 23. The diameter of the paddle shaft 4 is equal to the diameter of the through-going hole 23 so as to ensure that the paddle shaft 4 is sealed with the through-going hole 23. In an alternative solution, a sealing paddle 41 is provided at the end of the paddle lever 4, and the paddle 41 is used to seal the gap between the end of the paddle lever 4 and the airflow groove 32. The paddle 41 is detachably fixed to the end of the paddle shaft 4 for replacement of the vulnerable paddle 41. The paddle rod 4 is positioned in the connecting column 24, a sliding block 42 is detachably arranged on the paddle rod 4, and the sliding block 42 slides along the slide way 25.

The cylinder 3 is provided with lugs 11 corresponding to the lugs 11 of the housing 1, and the two cylinders 3 can be detachably connected to the upper and lower ends of the housing 1 respectively through bolts. The two cylinders 3 are disposed rotated by 180 ° with respect to the central axis of the housing 1 so that the groove bottoms of the airflow grooves 32 of the two cylinders 3 are equidistant. The rotor 2 is arranged in the shell 1, the output shaft 22 is rotatably arranged in the shaft hole 31 in a penetrating mode, and the output shaft 22 and the shaft hole 31 are fixed through a bearing. The cylinder cover 21 is in contact with and sealed with the end surface 36 of the cylinder body 3, and clearance sealing is adopted under the condition of ensuring processing precision and assembling precision, namely, the cylinder cover 21 is directly sealed with the end surface 36, and in an alternative scheme, labyrinth sealing or sealing piece sealing can be adopted. Further, the interval between both ends of the air flow groove 32 is larger than the inner diameter of the penetration hole 23, that is, the interval between both ends of the air flow groove 32 is larger than the diameter of the paddle lever 4, so as to prevent the both ends of the air flow groove 32 from directly communicating through the penetration hole 32. Every pair of through holes 23 is provided with a paddle rod 4 in a sliding mode, the paddle rods 4 are sealed with the through holes 23, the end portions of the paddle rods 4 are sealed with the airflow grooves 32, and gap sealing is adopted under the condition that machining precision and assembling precision are guaranteed, namely the paddle rods 4 are directly sealed with the through holes 23, and the end portions of the paddle rods 4 are directly sealed with the airflow grooves 32.

When in work: the compressed gas enters the airflow groove 32 from the first air hole 33, pushes the paddle lever 4 positioned in the airflow groove 32 to slide towards the middle part of the airflow groove 32, and drives the cylinder cover 21 to rotate around the axis of the shell 1 during the movement of the paddle lever 4, so that the output shaft 22 rotates. After the paddle rod 4 passes through the exhaust hole 35, the air is discharged out of the airflow groove 32, the paddle rod 4 continues to slide along the airflow groove 32 and slide through the first air hole 33 under the driving of the cylinder cover 21, and the compressed air does work on the paddle rod 4 again to push the paddle rod 4 to slide along the sliding groove to the exhaust hole 35. Since the two cylinders 3 are provided and the two cylinders 3 are provided to be rotated by 180 ° with respect to the central axis of the housing 1, the paddle lever 4 is subjected to the bottom of the air flow groove 32 during the sliding of the paddle lever 4 along the air flow groove 32, so that the paddle lever 4 is caused to slide back and forth in the axial direction within the threading hole 23. In the present embodiment, the length of the paddle lever 4 is equal to the distance from the bottom of the air flow groove 32 of the two cylinders 3 to ensure the sealing of the paddle lever 4 with the air flow groove 32.

The compressed gas pushes the paddle rod 4 to slide from the first air hole 33 to the exhaust hole 35 because the compressed gas has compression energy and can do work outwards, while the depth from the two ends to the middle part of the airflow groove 32 is gradually deepened, and in the process that the paddle rod 4 slides towards the middle part of the airflow groove 32, the volume of the compressed gas sealed in the airflow groove 32 between the paddle rod 4 and the first air hole 33 can be increased, namely the compressed gas is released and does work outwards. Due to the adoption of a plurality of paddle rods 4, the volume of the compressed gas sealed in the flow grooves between the adjacent paddle rods 4 is increased. In the present embodiment, the compressed gas becomes large in volume because of the inevitable result of the compressed gas having compression energy, similar to the working principle of the vane-type air motor.

In the pneumatic motor provided by the embodiment, one end of each paddle lever 4 is forced to be tightly attached to the bottom of the airflow groove 32 on the other side under the action of the bottom of the airflow groove 32 on the same side, so that the sealing between the paddle lever 4 and the airflow groove 32 is ensured at any time. When the paddles 41 are arranged, the paddles 41 at one end of each paddle rod 4 are forced to cling to the bottom of the airflow groove 32 at the other end under the action of the bottom of the airflow groove 32 at the same side, so that the sealing between the paddles 41 and the airflow groove 32 is ensured at any time, the working condition is simple, and the sealing deterioration or failure or even starting failure caused by the 'condition that one or more blades cannot be completely ejected' cannot occur. The paddle 41 of the present embodiment is a wearing part, and although the same as the blade in the prior art belongs to a wearing part, the working condition is simple, the situation that the blade cannot be ejected is avoided, and when the sealing effect is not good, the paddle 41 can be replaced.

In the present embodiment, since the plurality of paddle levers 4 are provided, the output shaft 22 can be continuously and smoothly rotated. Compared with the existing pneumatic motor, the pneumatic motor of the embodiment is more stable in output torque and rotation speed.

In the sealing form of the pneumatic motor of the embodiment, when the manufacturing precision and the assembly precision meet the precision requirement, the cylinder cover 21 and the end surface 36 of the cylinder body 3, the paddle rod 4 and the through hole 23, and the paddle rod 4 and the airflow groove 32 are in clearance sealing. When the clearance seal cannot be used, a labyrinth seal or a sealing sheet can be used for sealing between the cylinder cover 21 and the cylinder body 3, the output shaft 22 and the shaft hole 31 can be sealed by an oil seal, the paddle rod 4 and the threading hole 23 can be sealed by a sealing strip or a sealing ring, and the paddle rod 4 and the airflow groove 32 can be sealed by a sealing strip or a paddle sheet; or all sealing strips may be used to achieve the desired seal. Gap sealing is preferred when the manufacturing accuracy and assembly accuracy meet the accuracy requirements.

When the paddle 41 is used for sealing, the paddle 41 may be semicircular, triangular or rectangular, and the height of the paddle 41 is smaller than the depth of the through hole 23, so as to ensure that the paddle rod 4 is sealed with the through hole 23 at any time, and avoid gas leakage from the through hole 23 when the paddle 41 is located in the through hole 23. In order to seal the blades 41 and the air flow groove 32 at all times, the paddle lever 4 also needs to rotate at a certain angle while the paddle lever 4 revolves around the output shaft 22. Through the design of the slide way 25 and the slide block 42, the paddle rod 4 revolves for a circle and rotates for a circle at the same time, and the paddle blade 41 and the airflow groove 32 can be ensured to be sealed at any time.

After the paddle lever 4 slides through the exhaust hole 35, because the depth of the airflow groove 32 is gradually reduced, a process of compressing air is formed, and therefore, the second air hole 34 is arranged, air on the front side of the sliding direction of the paddle lever 4 can be exhausted, and reduction of power or efficiency caused by compressed air is avoided.

In the present embodiment, since the two cylinders 3 are identical and disposed rotated by 180 ° with respect to the central axis of the housing 1, the first air hole 33 and the second air hole 34 can be interchanged in function, i.e., the first air hole 33 is for intake air and the second air hole 34 is for exhaust air; or the first air hole 33 is used for exhaust and the second air hole 34 is used for intake. By using two cylinders 3, if the output power needs to be increased, compressed gas can be supplied to two first gas holes 33 simultaneously, or compressed gas can be supplied to two second gas holes 34 simultaneously. However, when the compressed gas is not supplied to the first gas holes 33, the compressed gas cannot be supplied to the second gas holes 34.

In addition, when the pneumatic interfaces are arranged at the first air hole 33 and the second air hole 34, the forward and reverse rotation technology can be realized.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. A pneumatic motor, comprising:

the shell (1), the said shell (1) is the tubular structure with upper and lower end openings;

the rotor (2) comprises two spaced and parallel cylinder covers (21), a supporting piece is arranged between the two cylinder covers (21), an output shaft (22) which faces outwards perpendicularly is arranged in the center of each cylinder cover (21), a plurality of penetrating holes (23) are formed in the edge of each cylinder cover (21), the penetrating holes (23) are distributed along the circumferential direction of the output shaft (22), and the penetrating holes (23) of the two cylinder covers (21) are equal in number and same in position;

a cylinder block (3), the cylinder block (3) is provided with a shaft hole (31) corresponding to the output shaft (22), the cylinder body (3) is provided with an end surface (36) which is used for being abutted against the cylinder cover (21), the cylinder body (3) is provided with an airflow groove (32) which protrudes outwards and has an inward opening, the top view of the airflow groove (32) is arc-shaped, a space is arranged between two ends of the airflow groove (32), and a part of an end surface (36) which is used for being abutted against the cylinder cover (21) is arranged between two ends of the airflow groove (32), the depth from the two ends to the middle part of the airflow groove (32) is gradually deepened, the cylinder body (3) is provided with a first air hole (33) and an exhaust hole (35) which are communicated with the airflow groove (32), the first air hole (33) is positioned at one end of the air flow groove (32), and the exhaust hole (35) is positioned in the middle of the air flow groove (32);

the paddle rod (4) is slidably arranged in the penetrating hole (23);

the two cylinder bodies (3) are arranged, the two cylinder bodies (3) are respectively detachably connected to the upper end and the lower end of the shell (1), the two cylinder bodies (3) are arranged in a manner of rotating 180 degrees relative to the central axis of the shell (1), the rotor (2) is arranged in the shell (1), the output shaft (22) is rotatably arranged in the shaft hole (31) in a penetrating manner, the cylinder cover (21) is in contact with and seals the end surface (36) of the cylinder body (3), the distance between the two ends of the airflow groove (32) is larger than the inner diameter of the penetrating hole (23), the paddle rod (4) is sealed with the penetrating hole (23), and when the end part of the paddle rod (4) is positioned in the airflow groove (32), the end part of the paddle rod (4) is sealed with the airflow groove (32).

2. The pneumatic motor according to claim 1, wherein the support member comprises a hollow connecting column (24), the inner diameter of the connecting column (24) is greater than or equal to the diameter of the through-holes (23), and both ends of the connecting column (24) are respectively fixed to the peripheries of two through-holes (23) which are in the same position.

3. The pneumatic motor according to claim 2, characterized in that the connecting column (24) is provided with a slideway (25), the slideway (25) is arranged along the length direction of the connecting column (24), the paddle rod (4) is positioned in the connecting column (24), a slide block (42) is detachably arranged on the paddle rod (4), and the slide block (42) slides along the slideway (25).

4. An air motor according to claim 1, wherein the cylinder (3) is provided with a second air hole (34) communicating with the air flow groove (32), the second air hole (34) being located at an end of the air flow groove (32) remote from the first air hole (33).

5. Pneumatic motor according to claim 4, characterized in that a pneumatic interface is provided at the first air hole (33) and/or the second air hole (34).

6. An air motor according to claim 1, characterized in that the cylinder head (21) is a labyrinth or sealing sheet seal with the cylinder block (3).

7. The air motor according to claim 1, wherein bearings are provided at both ends of the shaft hole (31), and the output shaft (22) and the shaft hole (31) are fixed by the bearings.

8. The air motor according to claim 1, wherein the exhaust hole (35) is provided in plurality, and the plurality of exhaust holes (35) are provided at intervals.

9. The pneumatic motor according to claim 1, wherein the exhaust hole (35) is a slit-shaped hole.

10. The pneumatic motor according to claim 1, wherein a plurality of the penetration holes (23) are evenly distributed along a circumferential direction of the output shaft (22).