CN209839004U

CN209839004U - Pneumatic clutch

Info

Publication number: CN209839004U
Application number: CN201920395668.9U
Authority: CN
Inventors: 王兴为
Original assignee: Linshu Lixin Machinery Parts Co Ltd
Current assignee: Linshu Lixin Machinery Parts Co Ltd
Priority date: 2019-03-26
Filing date: 2019-03-26
Publication date: 2019-12-24
Anticipated expiration: 2029-03-26

Abstract

The utility model discloses a pneumatic clutch, which comprises a cylinder seat, a cylinder body and a belt pulley, wherein the cylinder seat, the cylinder body and the belt pulley are sequentially sleeved on a rotating shaft along the axial direction of the rotating shaft, the cylinder seat is fixedly connected with the cylinder body, an air inlet communicated with the cylinder body is arranged on the cylinder seat, a piston which can move to the belt pulley along the axis of the rotating shaft under the drive of compressed air is arranged in the cylinder body, a reset spring is arranged between the piston and the cylinder body, and one end of the piston, which is far away from the cylinder seat, is connected with a top block which rotates by taking the axis of the rotating shaft as a; a flange is formed on the rotating shaft and between the cylinder body and the belt pulley, the flange extends outwards along the radial direction of the rotating shaft, and when the top block is abutted to the flange, the top block rotates along with the rotating shaft; when the flange is pressed against the belt pulley, the belt pulley rotates along with the rotating shaft. The utility model has the characteristics of avoid the pivot to bear great moment of torsion in the twinkling of an eye and take place the damage condition at the in-process of joint, be applicable to the great clutch of moment of torsion.

Description

Pneumatic clutch

Technical Field

The utility model belongs to the technical field of the clutch technique and specifically relates to a pneumatic clutch is related to.

Background

The pneumatic clutch is connected by compressed air and released by a return spring. At present, the clutch with large torque has a complex structure, is easy to damage, and is not easy to maintain after being damaged. And when the clutch bears large torque, the rotating shaft bears the large torque instantly, so that the rotating shaft is greatly impacted and damaged.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pneumatic clutch which avoids the damage of the rotating shaft caused by the instant bearing of a large torque in the process of jointing.

In order to achieve the above object, the utility model adopts the following technical scheme:

a pneumatic clutch comprises a cylinder seat, a cylinder body and a belt pulley, wherein the cylinder seat, the cylinder body and the belt pulley are sequentially sleeved on a rotating shaft along the axial direction of the rotating shaft, the cylinder seat is fixedly connected with the cylinder body, an air inlet communicated with the inside of the cylinder body is formed in the cylinder seat, a piston capable of moving towards the belt pulley along the axis of the rotating shaft under the drive of compressed air is arranged in the cylinder body, a return spring is arranged between the piston and the cylinder body, and an annular top block which rotates by taking the axis of the rotating shaft as a central line under the drive of the rotating shaft is connected to one end, far away from the cylinder seat, of the piston; a flange is formed on the rotating shaft and between the cylinder block and the belt pulley, and the flange extends outwards along the radial direction of the rotating shaft; the piston drives the ejector block to move towards the direction of the belt pulley under the action of compressed air, and when the ejector block is abutted to the flange, the ejector block rotates along with the rotating shaft; the flange moves towards the belt pulley under the jacking pressure of the jacking block, and when the flange abuts against the belt pulley, the belt pulley rotates along with the rotating shaft under the action of friction force between the flange and the belt pulley.

Furthermore, the rotating part comprises a bearing coinciding with the axis of the rotating shaft, an inner sleeve of the bearing is fixedly connected with one end face of the piston close to the belt pulley, and an outer sleeve of the bearing is fixedly connected with the top block.

Furthermore, external teeth are uniformly formed on one end face, far away from the cylinder block, of the flange along the circumferential direction of the rotating shaft, and internal teeth arranged corresponding to the external teeth are arranged on one end face, close to the cylinder block, of the belt pulley.

Furthermore, two symmetrical positioning pins are arranged on the end face of one end, away from the cylinder body, of the flange, an annular groove is formed in the end face, close to the cylinder body, of the belt pulley, the positioning pins move along the axis of the rotating shaft along with the rotating shaft so as to form circular motion of the positioning pins in the annular groove, and stop blocks used for stopping the positioning pins are symmetrically arranged in the annular groove.

Furthermore, a pin hole is formed in the annular groove at each stop block along the axis of the rotating shaft.

Further, the interior of the piston is hollow.

Furthermore, friction layers are respectively formed on the sides, close to each other, of the top block and the flange.

Further, both friction layers are of a layered structure made of NAO friction material.

The utility model discloses owing to adopted foretell structure, it compares with prior art, and the technical progress who gains lies in: the piston moves towards the belt pulley under the driving of compressed air entering the cylinder body from the air inlet, and along with the movement of the piston, the ejecting block connected with the piston through the rotating part is abutted against the flange formed on the rotating shaft, so that the rotating shaft drives the flange to rotate by taking the axis of the rotating shaft as a central line, and meanwhile, the ejecting block continuously ejects the flange to move towards the belt pulley under the action of the compressed air so as to enable the rotating shaft to move towards the belt pulley; when the flange is abutted against the belt pulley, the belt pulley rotates along with the rotating shaft under the action of friction force; therefore, the rotating shaft is firstly contacted with the ejector block through the flange and drives the ejector block to rotate together, so that the phenomenon that the rotating shaft is instantly subjected to large torque due to the fact that the rotating shaft is in direct contact with the piston is relieved, the flange drives the rotating shaft to be gradually contacted with the belt pulley along with the driving of the piston, the torque borne by the rotating shaft in the process is gradually improved, and the situation that the rotating shaft is instantly subjected to large torque in the process of connection to cause damage is avoided.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention.

In the drawings:

fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a sectional view of the axial structure of the embodiment of the present invention;

FIG. 3 is a schematic view of a partial structure of a rotating shaft according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a belt pulley according to an embodiment of the present invention.

Labeling components: 1-rotating shaft, 2-cylinder seat, 3-air inlet, 4-fixed hole, 5-cylinder body, 6-piston, 7-bearing, 8-top block, 9-reset spring, 10-flange, 11-belt pulley, 12-annular groove, 13-pin hole, 14-stop block, 15-positioning pin, 16-external tooth, 17-internal tooth and 18-friction layer.

Detailed Description

The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the invention.

Embodiment a pneumatic clutch

The embodiment discloses a pneumatic clutch, as shown in fig. 1 and 2, a cylinder block 5 and a belt pulley 11, and the cylinder block 2, the cylinder block 5 and the belt pulley 11 are sequentially sleeved on a rotating shaft 1 along the axial direction of the rotating shaft 1. The cylinder block 2 is uniformly provided with a plurality of fixing holes 4 in the circumferential direction, the cylinder block 2 is fixed on equipment through bolts penetrating through the fixing holes 4, the cylinder block 2 and the cylinder block 5 are integrally constructed, and the cylinder block 2 is provided with an air inlet 3 communicated with the inside of the cylinder block 5. A piston 6 is installed in the cylinder block 5, the piston 6 is movable toward the pulley 11 along the axis of the rotary shaft 1 by the compressed air, and the interior of the piston 6 is hollow for reducing the weight of the piston 6, facilitating the driving of the compressed air, and reducing the cost. In order to facilitate the resetting of the piston 6, the piston 6 and the cylinder block 5 are provided with the return spring 9, one end of the piston 6, which is far away from the cylinder block 2, is fixed with a rotating part, one end of the rotating part, which is far away from the piston 6, is fixed with the top block 8, wherein the rotating part comprises a bearing 7 coinciding with the axis of the rotating shaft 1, an inner sleeve of the bearing 7 and one end face, which is close to the belt pulley 11, of the piston 6 are fixedly welded together, and an outer sleeve of the bearing 7 and the top block 8 are fixedly. A flange 10 is formed on the rotary shaft 1 between the cylinder block 5 and the pulley 11, the flange 10 extending outward in the radial direction of the rotary shaft 1. The top block 8 moves with the piston 6 towards the pulley 11 to form a top block 8 abutting against the flange 10 and rotating with the shaft 1. And in order to improve the friction force between the top block 8 and the flange 10, friction layers 18 are respectively formed on the sides of the top block 8 and the flange 10, which are close to each other, the friction layers 18 on the flange 10 are shown in fig. 2, the friction layers 18 on the top block 8 are not shown, the friction layers 18 on the top block 8 are the same as the friction layers 18 on the flange 10, and both the friction layers are of a laminated structure made of NAO friction materials.

In order to enhance the torque resistance between the flange 10 and the pulley 11, in the present embodiment, as shown in fig. 3 and 4, external teeth 16 are uniformly formed on one end surface of the flange 10 away from the cylinder block 5 along the circumferential direction of the rotating shaft 1, internal teeth 17 corresponding to the external teeth 16 are provided on one end surface of the pulley 11 close to the cylinder block 5, and the flange 10 moves toward the pulley 11 under the pressing force of the top block 8 and contacts the pulley 11, at which time, the internal teeth 17 are respectively engaged with the external teeth 16.

In order to accurately match the internal teeth 17 with the external teeth 16, two symmetrical positioning pins 15 are configured on one end face of the flange 10 far away from the cylinder block 5, an annular groove 12 is formed on one end face of the pulley 11 near the cylinder block 5, and a stopper 14 for stopping the positioning pins 15 is symmetrically arranged in the annular groove 12. When the depth of the annular groove 12 is greater than the height of the positioning pins 15, the positioning pins 15 move along the axis of the rotating shaft 1 along with the rotating shaft 1, and the two positioning pins 15 do circular motion in the annular groove 12 until the two positioning pins 15 are respectively blocked by the two blocks 14, so that the belt pulley 11 rotates along with the rotating shaft 1, at the moment, the outer teeth 16 are aligned with the inner teeth 17, and along with the continuous motion of the flange 10 to the belt pulley 11, the outer teeth 16 are clamped in the inner teeth 17. When the depth of the annular groove 12 is smaller than the height of the positioning pin 15, a pin hole 13 is formed in the annular groove 12 at each stopper 14 along the axis of the rotating shaft 1, the positioning pin 15 moves along the axis of the rotating shaft 1 along with the rotating shaft 1, and the two positioning pins 15 make circular motion in the annular groove 12 until the two positioning pins 15 are respectively blocked by the two stoppers 14, the belt pulley 11 rotates along with the rotating shaft 1, the positioning pin 15 moves continuously along with the flange 10 towards the belt pulley 11 until the positioning pin 15 extends into the corresponding pin hole 13, and at the moment, each external tooth 16 is respectively clamped in each internal tooth 17.

The embodiment of the utility model provides a working process as follows:

when the rotating shaft 1 needs to be jointed with the belt pulley 11, compressed air enters the cylinder body 5 through the air inlet 3 of the cylinder seat 2, the piston 6 moves towards the belt pulley 11 along the axis of the rotating shaft 1 under the action of the compressed air, and the return spring 9 is continuously stretched; when the top block 8 is contacted with the flange 10 on the rotating shaft 1, the top block 8 rotates along with the rotating shaft 1 under the action of friction force; then, the piston 6 drives the ejector block 8 to continuously eject the flange 10 to the belt pulley 11 under the continuous action of the compressed air until the positioning pins 15 are blocked by the stoppers 14, then the belt pulley 11 rotates along with the rotating shaft 1, and the flange 10 continuously moves towards the belt pulley 11, finally, the external teeth 16 on the flange 10 are matched with the internal teeth 17 on the belt pulley 11, and meanwhile, each positioning pin 15 is inserted into the corresponding pin hole 13.

When the rotating shaft 1 needs to be separated from the belt pulley 11, compressed air is discharged from the air inlet 3, the piston 6 returns under the action of the return spring 9, so that the outer teeth 16 of the flange 10 are separated from the inner teeth 17 of the belt pulley 11, and the rotating shaft 1 is further separated from the belt pulley 11.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the protection of the claims of the present invention.

Claims

1. A pneumatic clutch, characterized by: the piston and the cylinder body are provided with a return spring, and one end of the piston, which is far away from the cylinder seat, is connected with an annular jacking block which rotates by taking the axis of the rotating shaft as a central line under the driving of the rotating shaft; a flange is formed on the rotating shaft and between the cylinder block and the belt pulley, and the flange extends outwards along the radial direction of the rotating shaft; the piston drives the ejector block to move towards the direction of the belt pulley under the action of compressed air, and when the ejector block is abutted to the flange, the ejector block rotates along with the rotating shaft; the flange moves towards the belt pulley under the jacking pressure of the jacking block, and when the flange abuts against the belt pulley, the belt pulley rotates along with the rotating shaft under the action of friction force between the flange and the belt pulley.

2. A pneumatic clutch according to claim 1, wherein: the rotating part comprises a bearing which is coincident with the axis of the rotating shaft, an inner sleeve of the bearing is fixedly connected with one end face of the piston, which is close to the belt pulley, and an outer sleeve of the bearing is fixedly connected with the top block.

3. A pneumatic clutch according to claim 1, wherein: and external teeth are uniformly formed on the end surface of one end, far away from the cylinder body, of the flange along the circumferential direction of the rotating shaft, and internal teeth which are arranged corresponding to the external teeth are arranged on the end surface of one end, close to the cylinder body, of the belt pulley.

4. A pneumatic clutch according to claim 1, wherein: two symmetrical positioning pins are arranged on the end face, far away from the cylinder body, of the flange, an annular groove is formed in the end face, near the cylinder body, of the belt pulley, the positioning pins move along the axis of the rotating shaft along with the rotating shaft to form circular motion of the positioning pins in the annular groove, and stop blocks used for stopping the positioning pins are symmetrically arranged in the annular groove.

5. A pneumatic clutch according to claim 4, wherein: and pin holes are formed in the annular grooves at the stop blocks along the axis of the rotating shaft.

6. A pneumatic clutch according to claim 1, wherein: the interior of the piston is hollow.

7. A pneumatic clutch according to claim 1, wherein: and friction layers are respectively formed on the sides, close to each other, of the top block and the flange.

8. A pneumatic clutch according to claim 7, wherein: both friction layers are of a layered structure made of NAO friction material.