Automatic clutch device

Abstract

The utility model discloses an automatic clutch device which comprises a clutch body and an output shaft, one end of the output shaft is inserted into the clutch body, a spiral tooth sleeve is arranged on the output shaft, and a limiting assembly used for installing ratchets into the clutch body is arranged on the clutch body. The limiting assembly is used for limiting one-way meshing of the ratchets and the spiral gear sleeve. In the utility model, the guide teeth and the meshing teeth are combined into a circle of teeth, so that the influence on the function of the clutch due to errors can be avoided. The axial length of the clutch can be shortened, and dynamic balance of the rotor can be better facilitated; when the jigger is installed, outer teeth of the spiral gear sleeve are meshed with inner teeth of the clutch firstly, the concentricity of the jigger and a jigged machine is increased, and the ratchets are not prone to being broken by collision. When the jigger is disassembled, the ratchet cannot block the outer teeth meshed with the spiral gear sleeve.

Description

TECHNICAL FIELD

[0001] The utility model mainly relates to the clutch technical field, concretely is a kind of automatic clutch device. BACKGROUND

[0002] The large rotor of turbine, large motor, large fan and other machines needs to be belted by discing device after shutdown or before startup to prevent accidents and improve the service life of rotor. These devices are generally high, and it is inconvenient to operate on site. Remote start-stop discing is generally selected.

[0003] The traditional automatic clutch has two outer teeth, one meshing tooth (transmitting torque) and one guide tooth (guiding without transmitting torque). The consistency of meshing tooth and guide tooth is required to be very high. Once deviation occurs during processing, the clutch will fail (unable to mesh and unable to disengage).

[0004] The traditional automatic clutch is provided with a ratchet tooth installed near the discing side. When installing the discing, the ratchet tooth is often broken by the outer tooth engaged by the spiral tooth sleeve because the discing and the clutch are not concentric at this time. Only after the discing is installed and started, it can be found that the ratchet tooth is broken. The discing needs to be disassembled, the clutch needs to be replaced with a ratchet tooth, and then the discing is reinstalled. The installation and disassembly of the discing are time-consuming and laborious. When disassembling the discing, the spiral tooth sleeve engaging tooth is blocked by the ratchet tooth, increasing the difficulty of disassembly. INVENTION CONTENTS

[0005] The utility model technical scheme provides a significantly different solution from the prior art to solve the technical problem that the spiral tooth sleeve engaging tooth is blocked by the ratchet tooth when the discing is installed and disassembled in the prior art.

[0006] The utility model solves the above technical problems by the following technical scheme:

[0007] An automatic clutch device includes a clutch body and an output shaft. The output shaft is inserted into the clutch body. A spiral tooth sleeve is arranged on the output shaft. A limiting assembly is arranged on the clutch body to mount a ratchet tooth in the clutch body. The limiting assembly limits the one-way engagement of the ratchet tooth and the spiral tooth sleeve.

[0008] Preferably, the limiting assembly includes a support pin shaft arranged in the clutch body. A locking screw is arranged on the clutch body to fix the support pin shaft in the clutch body.

[0009] Preferably, the ratchet tooth is arranged on the support pin shaft. A torsional spring is arranged on the support pin shaft to drive the ratchet tooth to rebound.

[0010] Preferably, a limiting pin shaft is arranged on the clutch body, and the ratchet is provided with an arc-shaped clamping groove at one end away from the supporting pin shaft, and the limiting pin shaft is arranged in the clamping groove.

[0011] Preferably, the output shaft is connected with the spiral gear sleeve through a threaded pair, and the spiral gear sleeve is provided with external teeth matched with the internal teeth of the clutch body.

[0012] Preferably, the ratchet is located at one side of the clutch body in the axial direction of the internal teeth, and the end face of the ratchet is slightly higher than the internal tooth groove of the clutch body.

[0013] Preferably, the output shaft is provided with an end cover at one end, and the output shaft is provided with a fixing screw on the same side for fixing the end cover at the end of the output shaft.

[0014] Compared with the prior art, the beneficial effects of the utility model are that the guide teeth and the meshing teeth are combined into a circle of teeth, which can avoid the influence of the error on the clutch function. Moreover, the axial length of the clutch can be reduced, and the dynamic balance of the rotor can be more favorable.

[0015] When the disc is installed, the external teeth of the spiral gear sleeve are first meshed with the internal teeth of the clutch, which increases the concentricity of the disc and the disced machinery, and the ratchet is not easy to be broken. When the disc is disassembled, the ratchet will not block the meshing external teeth of the spiral gear sleeve.

[0016] The utility model will be explained in detail in combination with the drawings and specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a structure schematic diagram of the spiral gear sleeve in the meshing state of the utility model;

[0018] Fig. 2 It is a structure schematic diagram of the spiral gear sleeve in the disengaging state of the utility model;

[0019] Fig. 3 It is a structure schematic diagram of the spiral gear sleeve in the clockwise disc direction of the utility model;

[0020] Fig. 4 It is a structure schematic diagram of the spiral gear sleeve in the counterclockwise disc direction of the utility model.

[0021] Marked in the figure:

[0022] 1, clutch body; 2, output shaft; 3, spiral gear sleeve; 4, ratchet; 5, supporting pin shaft; 6, locking screw; 7, torsion spring; 8, limiting pin shaft; 9, end cover; 10, fixing screw; 11, clamping groove. DETAILED DESCRIPTION

[0023] For the convenience of understanding the utility model, the utility model will be described more comprehensively below with reference to relevant drawings, and several embodiments of the utility model are given in the drawings, but the utility model can be realized through different forms and is not limited to the embodiments described in the text, on the contrary, these embodiments are provided to make the disclosed content of the utility model more thorough and comprehensive.

[0024] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be an intervening element, and when an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be an intervening element, the terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs, the terminology used in the specification of the utility model herein is for the purpose of describing specific embodiments only and is not intended to limit the utility model, the term "and / or" used herein includes any and all combinations of one or more relevant listed items.

[0026] Please refer to the drawings Figs. 1-4 An automatic clutch device, comprising a clutch body 1 and an output shaft 2, the output shaft 2 is inserted in the clutch body 1, the output shaft 2 is provided with a helical gear sleeve 3, the clutch body 1 is provided with a limiting assembly for installing the ratchet wheel 4 in the clutch body 1, and the limiting assembly is used for limiting the one-way engagement of the ratchet wheel 4 and the helical gear sleeve 3.

[0027] The specific operation process of the utility model is as follows: the output shaft 2 is the input end, is connected with the spiral tooth cover 3 through the screw pair, the end cover 9 is fixed in the output shaft 2 end portion with fixed screw 10, the spiral tooth cover 3 is limited in the screw pair;The clutch body 1 includes ratchet wheel 4, support pin shaft 5, torsion spring 7, limit pin shaft 8 and clutch shell;A pair of ratchet wheel 4 and torsion spring 7 are limited in the clutch body 1 by support pin shaft 5 and limit pin shaft 8, the ratchet wheel 4 is stretched out in the groove by the elastic force of torsion spring 7, the ratchet wheel 4 end face is flush with the one side of clutch inner tooth groove at this time, when the output shaft 2 rotates forward, the spiral tooth cover 3 will rotate together through the screw pair, when the ratchet wheel 4 is pressed against the spiral tooth cover 3 outer tooth, the spiral tooth cover 3 moves axially to the clutch meshing tooth, after the spiral tooth cover 3 outer tooth is engaged with the clutch inner tooth, the output shaft 2 passes through the clutch body 1 and is driven equipment is powered;When the driven equipment speed is greater than the output shaft 2, the clutch inner tooth rotates with the spiral tooth cover 3, because the spiral tooth cover 3 is connected with the output shaft 2 and is the screw pair, the spiral tooth cover 3 will move axially away from the direction of clutch meshing tooth, after the clutch inner tooth and the spiral tooth cover 3 outer tooth are disengaged, the spiral tooth cover 3 stops moving, and the driven equipment rotates alone, and the clutch inner tooth and the output shaft 2 are disengaged;When the output shaft 2 reversely rotates, the spiral tooth cover 3 will rotate together through the screw pair, because the clutch inner tooth limits the rotation of the spiral tooth cover 3, the spiral tooth cover 3 will move axially away from the direction of clutch meshing tooth;After the clutch inner tooth and the spiral tooth cover 3 outer tooth are disengaged;The clutch inner tooth and the output shaft 2 are disengaged.

[0028] Please refer to Figs. 1-4 The limiting assembly includes support pin shaft 5, support pin shaft 5 is arranged inside the clutch body 1, the clutch body 1 is provided with the stop screw 6 for fixing support pin shaft 5 inside the clutch body 1, ratchet wheel 4 is arranged on support pin shaft 5, support pin shaft 5 is provided with torsion spring 7 for driving ratchet wheel 4 to rebound, the clutch body 1 is provided with limit pin shaft 8, ratchet wheel 4 is provided with circular arc-shaped clamping groove 11 at the end away from support pin shaft 5, and limit pin shaft 8 is arranged inside clamping groove 11.

[0029] The clutch body 1 includes ratchet wheel 4, support pin shaft 5, torsion spring 7, limit pin shaft 8 and clutch shell;Support pin shaft 5 is fixed inside the clutch body 1 by stop screw 6, a pair of ratchet wheel 4 and torsion spring 7 are limited in the clutch body 1 by support pin shaft 5 and limit pin shaft 8, the ratchet wheel 4 is stretched out in the groove by the elastic force of torsion spring 7, the ratchet wheel 4 end face is slightly higher than the clutch inner tooth groove at this time.

[0030] Please refer to Figs. 1-4 The output shaft 2 is connected with the spiral tooth cover 3 through the screw pair, the outer side of the spiral tooth cover 3 is provided with the outer tooth matched with the inner tooth of the clutch body 1, the ratchet wheel 4 is located at the side of the axial direction of the inner tooth of the clutch body 1, and the ratchet wheel 4 end face is slightly higher than the clutch body 1 inner tooth groove.

[0031] A pair of ratchets 4 and torsion springs 7 are limited in the clutch body 1 by the support pin 5 and the limiting pin 8, the ratchets 4 are extended into the groove by the elastic force of the torsion springs 7, at this time the end face of the ratchets 4 is flush with one side of the inner tooth groove of the clutch, when the output shaft 2 rotates forward, the helical gear sleeve 3 will rotate together through the threaded pair, when the ratchets 4 top the outer teeth of the helical gear sleeve 3, the helical gear sleeve 3 moves axially to the meshing tooth shaft of the clutch, after the outer teeth of the helical gear sleeve 3 mesh with the inner teeth of the clutch, the output shaft 2 transmits power to the driven equipment through the clutch body 1.

[0032] Please refer to Figs. 1-4 The output shaft 2 is provided with an end cover 9 at one end, and the output shaft 2 is provided with a fixing screw 10 on the same side for fixing the end cover 9 at the end of the output shaft 2.

[0033] The output shaft 2 is the input end, is connected with the helical gear sleeve 3 through the threaded pair, and the end cover 9 is fixed at the end of the output shaft 2 by the fixing screw 10, so that the helical gear sleeve 3 is limited in the threaded pair.

[0034] The utility model is described exemplarily in combination with the drawings, and obviously, the specific implementation of the utility model is not limited by the above-mentioned mode, as long as the method concept and technical scheme of the utility model are adopted for this kind of non-essential improvement or the concept and technical scheme of the utility model are directly applied to other occasions without improvement, all are within the protection scope of the utility model.

Claims

1. An automatic clutch device comprising a clutch body (1) and an output shaft (2) inserted inside the clutch body (1) at one end, characterized in that: The output shaft (2) is provided with a helical tooth sleeve (3), the clutch body (1) is provided with a limiting assembly for mounting the ratchet (4) inside the clutch body (1), and the limiting assembly is used for limiting the one-way engagement of the ratchet (4) and the helical tooth sleeve (3).

2. An automatic clutching device according to claim 1, characterized in that: The limiting assembly comprises a supporting pin shaft (5) arranged inside the clutch body (1), and the clutch body (1) is provided with a clamping screw (6) for fixing the supporting pin shaft (5) inside the clutch body (1).

3. An automatic clutching device according to claim 2, characterized in that: The ratchet (4) is arranged on the supporting pin shaft (5), and the supporting pin shaft (5) is provided with a torsional spring (7) for driving the ratchet (4) to rebound.

4. An automatic clutching device according to claim 1, characterized in that: The clutch body (1) is provided with a limiting pin shaft (8), and the ratchet (4) is provided with an arc-shaped clamping groove (11) at one end away from the supporting pin shaft (5), and the limiting pin shaft (8) is arranged in the clamping groove (11).

5. An automatic clutching device according to claim 1, characterized in that: The output shaft (2) and the helical tooth sleeve (3) are connected through a threaded pair, and the outer side of the helical tooth sleeve (3) is provided with outer teeth matched with the inner teeth of the clutch body (1).

6. An automatic clutching device according to claim 1, characterized in that: The ratchet (4) is located on one side of the axial direction of the inner teeth of the clutch body (1), and the end face of the ratchet (4) is slightly higher than the inner tooth groove of the clutch body (1).

7. An automatic clutching device as claimed in claim 1, wherein: One end of the output shaft (2) is provided with an end cover (9), and the same side of the output shaft (2) is provided with a fixing screw (10) for fixing the end cover (9) at the end of the output shaft (2).

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