Novel normally closed pneumatic clutch

Abstract

The utility model discloses a novel normally-closed pneumatic clutch, which belongs to the field of industrial clutches and comprises a hollow through shaft tube, a flange fluted disc rotatably sleeved on the hollow through shaft tube, a driving fluted disc axially moving on the hollow through shaft tube and a driving structure fixedly mounted on the hollow through shaft tube. The driving structure comprises a cylinder body rotationally arranged on the hollow through shaft pipe in a sleeving mode, a driving ring A rotationally arranged on the driving fluted disc in a sleeving mode and a driving ring B axially moving on the cylinder body, and an air inlet hole is formed in the driving ring B; the driving structure further comprises a pressing ring fixedly arranged on the hollow through shaft pipe in a sleeving mode and a brake spring fixedly arranged between the pressing ring and the driving fluted disc. According to the clutch, the elastic design of the brake spring is utilized, when gas supply of the cylinder body is cut off, the driving fluted disc and the flange fluted disc are in an engaged state through the elasticity of the brake spring, the engagement stability of the driving fluted disc and the flange fluted disc is ensured, normally-closed of the clutch is achieved, and the working condition needing long-term combination can be met.

Description

Technical Field

[0001] This application relates to the technical field of industrial clutches, and specifically to a new type of normally closed pneumatic clutch. Background Technique

[0002] A clutch is a commonly used component in mechanical transmission and can separate or engage the transmission system at any time. As shown in the traditional toothed clutch Figure 2 it is a normally open clutch. When engaging, the driving member 4' is pushed to move the driving gear disk 3' closer to the flange gear disk 2', so that the driving gear disk 3' meshes with the flange gear disk 2', and the driving gear disk 3' is combined with the transmission gear disk 2, thereby transmitting the power on the driving gear disk 3' to the flange gear disk 2'; when disengaging, after the driving member 4' is released, under the elastic force of the return spring 5', the driving gear disk 3' is pushed away from the flange gear disk 2', so that the driving gear disk 3' is separated from the flange gear disk 2'. Although the clutch can achieve the engagement purpose, in the working conditions that require long-term engagement, it is necessary to ensure that the driving cylinder is always ventilated and in the working state, and it is difficult to continuously control the stability of the pressure in the cylinder. When the pressure in the cylinder decreases, the torque decreases, which easily causes the clutch that needs to be engaged to fail to work.

[0003] Therefore, this application provides a new type of normally closed pneumatic clutch to solve the above problems. Utility Model Content

[0004] This application provides a new type of normally closed pneumatic clutch, aiming to solve the problems in the background technique that although the existing clutch can achieve the engagement purpose, in the working conditions that require long-term engagement, it is necessary to ensure that the driving cylinder is always ventilated and in the working state, it is difficult to continuously control the stability of the pressure in the cylinder, when the pressure in the cylinder decreases, the torque decreases, and it is easy to cause the clutch that needs to be engaged to fail to work.

[0005] To achieve the above object, this application provides the following technical solution: A new type of normally closed pneumatic clutch, including a hollow through shaft tube, a flange gear disk rotatably sleeved on the hollow through shaft tube, a driving gear disk axially moving on the hollow through shaft tube and meshingly connected with the flange gear disk, and a driving structure fixedly installed on the hollow through shaft tube for driving the driving gear disk to axially move;

[0006] The driving structure includes a cylinder body rotatably sleeved on one end of the hollow through-shaft tube away from the flange tooth disc, a driving ring A rotatably sleeved on the driving tooth disc, and a driving ring B axially moving on the cylinder body and fixedly connected to the driving ring A. An air inlet hole communicating with the inside of the driving ring B is provided on the driving ring B for introducing gas to move the driving ring B away from the flange tooth disc; the driving structure further includes a pressing ring fixedly sleeved on the hollow through-shaft tube corresponding to the end of the cylinder body close to the driving tooth disc, and a braking spring fixedly arranged between the pressing ring and the driving tooth disc for moving the driving tooth disc close to the flange tooth disc. This clutch has a compact structure, small volume, and light weight. It adopts a split driving ring structure, which is beneficial to processing and installation. An independent limiting structure is designed, making the work more accurate and energy-saving; precision bearings are used to make the torque transmission more stable and reliable, and the work is smooth; the tooth-type engagement is reliable and not easy to slip, which is very suitable for industrial production and working occasions with high requirements for smooth transmission; this clutch is of normally closed structure, which can better meet the working conditions that need to be combined for a long time.

[0007] Preferably, sealing rings for sealing the gap between the driving ring B and the cylinder body are arranged at both ends of the cylinder body corresponding to the inner wall of the driving ring B, and the air inlet hole is located between the two sealing rings on the driving ring B.

[0008] Preferably, a limiting ring for moving the driving ring A close to the cylinder body for limiting is fixedly inserted inside the opposite ends of the driving ring A and the driving ring B.

[0009] Preferably, first bearings are arranged between the hollow through-shaft tube and the flange tooth disc and the cylinder body, and a second bearing is arranged between the driving ring A and the driving tooth disc.

[0010] Preferably, the driving tooth disc is connected to the hollow through-shaft tube through a spline.

[0011] This clutch utilizes the elastic design of the braking spring. When the gas supply to the cylinder body is disconnected, the driving tooth disc and the flange tooth disc are in an engaged state through the elasticity of the braking spring. At this time, since the air inlet end of the cylinder body is in a closed state, the driving ring B and the driving ring A will not move to the right. Under the elastic force of the spring, the driving tooth disc can always maintain a leftward force, ensuring the stability of the engagement between the driving tooth disc and the flange tooth disc, and realizing the normally closed state of the clutch to meet the working conditions that need to be combined for a long time.

[0012] This clutch has a compact structure, small volume, and light weight. It adopts a split driving ring structure, which is beneficial to processing and installation. An independent limiting structure is designed, making the work more accurate and energy-saving; precision bearings are used to make the torque transmission more stable and reliable, and the work is smooth; the tooth-type engagement is reliable and not easy to slip, which is very suitable for industrial production and working occasions with high requirements for smooth transmission. Description of the Drawings

[0013] Figure 1 It is a structural schematic diagram of a new type of normally-closed pneumatic clutch;

[0014] Figure 2 It is a structural schematic diagram of a traditional clutch.

[0015] In the figure:

[0016] 1. Hollow through-shaft tube; 2. Flange tooth disc; 3. Driving tooth disc; 4. Driving structure; 41. Cylinder block; 42. Driving ring A; 421. Limiting ring; 43. Driving ring B; 431. Air inlet hole; 432. Sealing ring; 44. Braking spring; 45. Pressing ring; 5. First bearing; 6. Second bearing. Specific implementation manners

[0017] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present application.

[0018] This embodiment provides a new type of normally-closed pneumatic clutch, as Figure 1 shown. The clutch includes a hollow through-shaft tube 1, a flange tooth disc 2 rotatably sleeved on the hollow through-shaft tube 1, a driving tooth disc 3 axially moving on the hollow through-shaft tube 1 and meshingly connected with the flange tooth disc 2, and a driving structure 4 fixedly installed on the hollow through-shaft tube 1 for driving the driving tooth disc 3 to axially move;

[0019] Different from the existing clutch: The driving structure 4 includes a cylinder block 41 rotatably sleeved on one end of the hollow through-shaft tube 1 away from the flange gear disc 2, a driving ring A 42 rotatably sleeved on the driving gear disc 3, and a driving ring B 43 axially moving on the cylinder block 41 and fixedly connected to the driving ring A 42. An air inlet hole 431 communicating with the inside of the driving ring B 43 is provided on the driving ring B 43 for introducing gas to move the driving ring B 43 away from the flange gear disc 2; The driving structure 4 further includes a pressure ring 45 fixedly sleeved on the hollow through-shaft tube 1 corresponding to the end of the cylinder block 41 close to the driving gear disc 3, and a braking spring 44 fixedly arranged between the pressure ring 45 and the driving gear disc 3 for moving the driving gear disc 3 close to the flange gear disc 2. Utilizing the elastic design of the braking spring 44, when the gas supply to the cylinder block 41 is disconnected, the driving gear disc 3 is in an engaged state with the flange gear disc 2 through the elasticity of the braking spring 44. At this time, since the air inlet end of the cylinder block 41 is in a closed state, the driving ring B 43 and the driving ring A 42 will not move to the right, and the driving gear disc 3 can always maintain a leftward force under the elastic force of the spring, ensuring the stability of the engagement between the driving gear disc 3 and the flange gear disc 2, and realizing the normally closed state of the clutch to meet the working conditions that need to be combined for a long time.

[0020] The function of this form of mechanism is that the clutch is in a combined braking state in the natural state. When it needs to be released, a pressure source is introduced through the air inlet hole 431 to disconnect the clutch. When it needs to be combined, the air source is disconnected, and the braking spring 44 makes the clutch combine again. Among them, the pressure ring 45 is splined to the hollow through-shaft tube 1 radially, pressing the braking spring 44 tightly on the left side and pressing the bearing 5 tightly on the right side, and always remains stationary. This form of clutch has a compact structure, small volume, and light weight. It adopts a split driving ring structure, which is conducive to processing and installation. An independent limit structure is designed, and the work is more accurate and energy-saving; Precision bearings are used to make the torque transmission smoother and more reliable, and the work is smooth; The tooth type combination is reliable and not easy to slip, which is very conducive to industrial production and working occasions with high requirements for transmission smoothness.

[0021] Specifically, sealing rings 432 for sealing the gap between the driving ring B 43 and the cylinder block 41 are provided at both ends of the cylinder block 41 corresponding to the inner wall of the driving ring B 43, and the air inlet hole 431 is located between the two sealing rings 432 on the driving ring B 43.

[0022] Specifically, a limiting ring 421 for limiting the movement of the driving ring A42 close to the cylinder block 41 is fixedly inserted into one end of the driving ring A42 and the driving ring B43. After the driving ring A42 on the left side of the limiting ring 421 and the driving ring B43 on the right side are locked, they are fixed and can position the precision bearing 5. After the pressure source is introduced into the driving ring B43, it pulls the driving ring A42, the driving gear disk 3 and the limiting ring 421 to axially move to the right. When the right side of the limiting ring 421 contacts the cylinder block 41, the axial movement stops. At this time, the driving gear disk 3 is separated from the flange gear disk 2 and does not transmit torque. After separation, the flange gear disk 2 rotates together with the output end, and the driving gear disk 3 rotates together with the input end through the hollow through-shaft tube 1.

[0023] Specifically, a first bearing 5 is provided between the hollow through-shaft tube 1 and both the flange gear disk 2 and the cylinder block 41, and a second bearing 6 is provided between the driving ring A42 and the driving gear disk 3.

[0024] Specifically, the driving gear disk 3 is connected to the hollow through-shaft tube 1 through a spline.

[0025] As Figure 1 shown, the structural principle is that when the pressure source is not introduced into the clutch, the right side of the brake spring 44 on the driving gear disk 3 is pressed by the pressing ring 45, generating an axial force to the left, pressing the flange gear disk 2, and the driving gear disk 3 meshes with the end face teeth of the flange gear disk 2, and the clutch enters the braking state.

[0026] When the pressure source is introduced into the clutch, after the pressure source is introduced into the driving ring B43, it overcomes the brake spring 44 and pulls the driving ring A42, the driving gear disk 3 and the limiting ring 421 to axially move to the right. When the right side of the limiting ring 421 contacts the cylinder block 41, the axial movement stops. At this time, the driving gear disk 3 is separated from the flange gear disk 2, and the clutch will be in the separated state. At this time, the clutch is released; when it is necessary to combine and brake again, the pressure source in the cylinder block 41 is discharged, and under the action of the brake spring 44, the clutch combines and brakes again.

[0027] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application, according to the technical solution and its concept of the present application, makes equivalent substitutions or changes, and should be covered by the protection scope of the present application.

Claims

1. A novel normally-closed pneumatic clutch, comprising a hollow through-shaft tube (1), a flange gear disc (2) rotatably sleeved on the hollow through-shaft tube (1), a driving gear disc (3) axially moving on the hollow through-shaft tube (1) and meshed with the flange gear disc (2), and a driving structure (4) fixedly installed on the hollow through-shaft tube (1) for driving the driving gear disc (3) to axially move; It is characterized in that: The driving structure (4) includes a cylinder block (41) rotatably sleeved at one end of the hollow through-shaft tube (1) away from the flange gear disc (2), a driving ring A (42) rotatably sleeved on the driving gear disc (3), and a driving ring B (43) axially moving on the cylinder block (41) and fixedly connected with the driving ring A (42). An air inlet hole (431) communicating with the inside of the driving ring B (43) is provided on the driving ring B (43) for introducing gas to move the driving ring B (43) away from the flange gear disc (2); The driving structure (4) further includes a pressure ring (45) fixedly sleeved on the hollow through-shaft tube (1) corresponding to the end of the cylinder block (41) close to the driving gear disc (3), and a braking spring (44) fixedly arranged between the pressure ring (45) and the driving gear disc (3) for moving the driving gear disc (3) close to the flange gear disc (2).

2. The novel normally closed pneumatic clutch according to claim 1, characterized in that: Sealing rings (432) for sealing the gap between the driving ring B (43) and the cylinder block (41) are provided at both ends of the cylinder block (41) corresponding to the inner wall of the driving ring B (43), and the air inlet hole (431) is located between the two sealing rings (432) on the driving ring B (43).

3. The novel normally-closed pneumatic clutch according to claim 1, wherein: A limiting ring (421) for limiting the driving ring A (42) to move close to the cylinder block (41) is fixedly inserted into the relative ends of the driving ring A (42) and the driving ring B (43).

4. The novel normally closed pneumatic clutch according to claim 1, wherein: First bearings (5) are provided between the hollow through-shaft tube (1) and the flange gear disc (2) and the cylinder block (41), and a second bearing (6) is provided between the driving ring A (42) and the driving gear disc (3).

5. The novel normally closed pneumatic clutch according to claim 1, wherein: The driving gear disc (3) is connected to the hollow through-shaft tube (1) by splines.

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