CN213839338U

CN213839338U - Normally closed clutch with coaxial core structure

Info

Publication number: CN213839338U
Application number: CN202022668139.7U
Authority: CN
Inventors: 徐亮
Original assignee: Shiyan Paite Mechanical & Electrical Technology Co ltd
Current assignee: Shiyan Paite Mechanical & Electrical Technology Co ltd
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-07-30
Anticipated expiration: 2030-11-18

Abstract

The utility model provides a normal close formula clutch of core coaxial structure, including integral key shaft, output flange, intermediate flange, fixed cylinder, its core is: the output flange and the intermediate flange are coaxially arranged on the spline shaft, a compression spring is sleeved at the spline part of the spline shaft, one end of the compression spring is limited on the spline shaft by a retainer ring, and the other end of the compression spring is propped against the intermediate flange to ensure that the intermediate flange is normally meshed with the output flange; the fixed cylinder is in transmission connection with the intermediate flange, and when the fixed cylinder works, the intermediate flange is reversely pushed to be separated from the output flange. The utility model discloses a long-term operating condition need not ventilate, has solved the problem that the gas circuit solenoid valve is short-lived because of long-time high frequency work, has solved the sealed original paper of gas circuit and has operated the fragile problem because of long-term under the high atmospheric pressure to reliable operation, simple structure.

Description

Normally closed clutch with coaxial core structure

Technical Field

The utility model relates to a with the supporting clutch that uses such as all kinds of engineering auxiliary engine, driving motor, especially normally closed clutch.

Background

At present, normally open type clutches are mainly adopted in the market to connect loads such as various engineering auxiliary engines, driving motors, water pumps, oil pumps and vacuum pumps and serve as power transmission and cut-off devices, the combination mode mainly adopts pneumatic or electromagnetic attraction type, the main working state is the combination state (air cylinders are pushed to working positions or electromagnetic coils are attracted), if the clutches are combined in a pneumatic mode, electromagnetic valves for controlling air paths are in long-time working states during working, the service lives of the electromagnetic valves are short, and the structure has high requirements on the sealing performance of the air paths, so that the failure rate is relatively high; if the electromagnetic attracting and separating mode is adopted, the slipping abrasion and even the function failure of the combined interface of the clutch can be caused if the phenomena of insufficient current, circuit failure or excessively dirty attracting surface and the like occur.

For example, the central coaxial clutch type clutch disclosed in CN201866127U, which is pneumatically coupled, has a problem of relatively high failure rate.

Disclosure of Invention

In order to solve current normally open clutch and need work for a long time and lead to the solenoid valve short-lived, the gas circuit component fragile, the solenoid condition of skidding frequently takes place the scheduling problem, the utility model provides a core coaxial structure's normally closed clutch.

The utility model discloses technical scheme as follows: the utility model provides a normal close formula clutch of heart coaxial arrangement, includes integral key shaft, output flange, intermediate flange, fixed cylinder, its characterized in that: the output flange and the intermediate flange are coaxially arranged on the spline shaft, the output flange can be rotatably supported at one end of the spline shaft, the intermediate flange and the spline shaft form a moving pair fit, the fixed cylinder can be rotatably supported at the other end of the spline shaft to form a rotating pair fit, a compression spring is sleeved at the spline part of the spline shaft, one end of the compression spring is limited on the spline shaft by a retainer ring, and the other end of the compression spring is abutted against the intermediate flange to keep the intermediate flange and the output flange normally engaged;

the fixed cylinder and the intermediate flange are rotationally connected (can rotate mutually) along the axial direction of the spline, and when the fixed cylinder is ventilated and works, the intermediate flange and the output flange are reversely pushed to be separated.

The technical scheme is further limited as follows: the output flange is connected with a belt pulley.

The technical scheme is further limited as follows: the further structure setting of integral key shaft, output flange, intermediate flange, fixed cylinder: the output flange is sleeved on the spline shaft through two first bearings, the two first bearings and the output flange form an integral part, and the integral part is limited by the clamp spring for the first shaft and an external spline step of the spline shaft; the compression spring is sleeved at the spline part of the spline shaft, one end of the compression spring is limited by the retainer ring, and the other end of the compression spring is limited by the intermediate flange; the inner spline part of the middle flange is matched with the spline shaft, the piston disc is arranged in the inner cavity of the fixed cylinder body, the excircle of the piston disc is provided with a large sealing ring, the fixed cylinder body is connected with the sealing cover through a screw, and the inner circular groove of the sealing cover is provided with a small sealing ring to form an air cylinder with the middle groove of the fixed cylinder body; the outer circle of the middle flange is sleeved in the inner hole of the piston disc through a second bearing, the second bearing is limited by the inner hole step of the piston disc, the end face of the middle flange and a third shaft on the outer side through clamp springs, a locking ring fastened on the end face of the piston disc limits the bearing and the piston disc, and the locking ring is locked on the piston disc through a fastening screw, so that the fixed cylinder and the middle flange are fixedly connected in a moving mode along the axis direction; the fixed cylinder body is supported at the other end of the spline shaft through a third bearing and is limited by the third bearing, a clamp spring for a second shaft and a clamp spring for a second hole; the third bearing is limited by an inner hole step of the fixed cylinder body and a step at one end of a retainer ring, and the retainer ring is limited by a step at the other end of the spline shaft; the belt pulley and the output flange are fixed by a first bolt.

The technical scheme is further limited as follows: the tip of fixed cylinder block is equipped with the protection casing, and the protection casing passes through the second bolted connection on fixed cylinder block, and the protection casing can protect in dust and debris get into the clutch.

The utility model discloses a theory of operation: the input end of the clutch is a spline shaft, and the output end of the clutch is an output flange and a belt pulley connected with the output flange; when the air inlet of the fixed cylinder is not ventilated (which is in a conventional working state), the intermediate flange is kept combined with the output flange due to the extension action of the compression spring, and the output flange, the belt pulley and the input shaft keep synchronous rotation at the moment; when the air inlet of the fixed cylinder is ventilated, the air pressure pushes the piston disc, the piston disc pushes the intermediate flange to be finally separated from the output flange, the intermediate flange simultaneously presses the compression spring, and the output flange does not rotate synchronously along with the rotation of the input shaft.

The utility model has the advantages that: 1. the ventilation is not needed in the long-term working state; 2. the problem that the service life of the gas circuit electromagnetic valve is short due to long-time high-frequency work is solved; 3. the problem that the sealing element of the gas path is easy to damage due to long-term operation under high pressure is solved; 4. reliable operation and simple structure.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Shown in FIG. 1: 1. the novel bearing comprises a fixed cylinder body, 2 parts of a third bearing, 3 parts of a locking ring, 4 parts of a fastening screw, 5 parts of a piston disc, 6 parts of a second bearing, 7 parts of an intermediate flange, 8 parts of a shaft clamp spring, 9 parts of a large sealing ring, 10 parts of a small sealing ring, 11 parts of a compression spring, 12 parts of a retainer ring, 13 parts of a first bearing, 14 parts of a spline shaft, 15 parts of an output flange, 16 parts of a screw, 17 parts of a sealing cover, 18 parts of a third shaft clamp spring, 19 parts of a hole clamp spring, 20 parts of a belt pulley, 21 parts of a first bolt, 22 parts of a protective cover, 23 parts of a second bolt and 24 parts of a second shaft clamp spring.

Detailed Description

The present invention is further described below with reference to the accompanying drawings.

As shown in fig. 1, the center part of the clutch is coaxial with the clutch which is normally closed, the output flange is sleeved on the spline shaft 14 through two first bearings 13, the two first bearings 13 and the output flange 15 form an integral part, and the integral part is limited by the clamp spring 8 for the first shaft and the external spline step of the spline shaft 14; the compression spring 11 is sleeved at the spline part of the spline shaft 14, one end of the compression spring is limited by the retainer ring 12, and the other end of the compression spring is limited by the intermediate flange 7; the internal spline part of the middle flange 7 is matched with the spline shaft 14, the piston disc 5 is arranged in the cavity of the fixed cylinder body 1, the excircle of the piston disc 5 is provided with a large sealing ring 9, the fixed cylinder body 1 is connected with a sealing cover 17 through a spigot and a screw 16, and the inner circular groove of the sealing cover 18 is provided with a small sealing ring 10 to realize the sealing of the air cavity of the fixed cylinder body 1; the outer circle of the middle flange 7 is sleeved in the inner hole of the piston disc 5 through the second bearing 6, the second bearing 6 is limited by the inner hole step of the piston disc 5 and the end face of the middle flange 7 and the third shaft at the outer side through the snap springs 18, the locking ring 3 fastened on the end face of the piston disc 5 limits the bearing 6 and the piston disc 5, and the locking ring 3 is locked on the piston disc 5 through the fastening screw 4, so that the fixed cylinder and the middle flange are fixedly connected in a moving mode along the axial direction; the fixed cylinder body 1 is supported at the other end of the spline shaft 14 through the third bearing 2, and the fixed cylinder body 1 is limited by the third bearing 2, a clamp spring 24 for a second shaft and a clamp spring 19 for a hole; the third bearing 2 is limited by an inner hole step of the fixed cylinder body 1 and a step at one end of a retainer ring 12, and the retainer ring 12 is limited by a step at the other end of the spline shaft; the belt pulley and the output flange 15 are fixed by a first bolt 21; the end of the fixed cylinder block is provided with a protective cover 22, the protective cover 22 is connected to the fixed cylinder block 1 through a second bolt 23, and the protective cover can prevent dust and sundries from entering the clutch.

In the utility model, the belt pulley is not necessary and can be replaced by other devices for transmitting kinetic energy; the spline connection of the intermediate flange and the spline shaft can also be replaced by other sliding pair connections.

The utility model discloses be not limited to above-mentioned embodiment, its technical core is: the output flange and the intermediate flange are coaxially arranged on the spline shaft, a compression spring is sleeved at the spline part of the spline shaft, one end of the compression spring is limited on the spline shaft by a retainer ring, and the other end of the compression spring is propped against the intermediate flange, so that the intermediate flange is normally meshed with the output flange; the fixed cylinder is in transmission connection with the intermediate flange, and when the fixed cylinder works, the intermediate flange is reversely pushed to be separated from the output flange.

Claims

1. The utility model provides a normal close formula clutch of heart coaxial arrangement, includes integral key shaft, output flange, intermediate flange, fixed cylinder, its characterized in that: the output flange and the intermediate flange are coaxially arranged on the spline shaft, the output flange can be rotatably supported at one end of the spline shaft, the intermediate flange and the spline shaft form a moving pair fit, the fixed cylinder can be rotatably supported at the other end of the spline shaft to form a rotating pair fit, a compression spring is sleeved at the spline part of the spline shaft, one end of the compression spring is limited on the spline shaft by a retainer ring, and the other end of the compression spring is abutted against the intermediate flange to keep the intermediate flange and the output flange normally engaged;

the fixed cylinder is rotationally connected with the intermediate flange along the axis direction of the spline, and when the fixed cylinder is ventilated and works, the intermediate flange is reversely pushed to be separated from the output flange.

2. The normally closed clutch of claim 1, further comprising: the output flange is connected with a belt wheel.

3. The normally closed clutch of claim 2, further comprising: the further structure setting of integral key shaft, output flange, intermediate flange, fixed cylinder: the output flange is sleeved on the spline shaft through two first bearings, the two first bearings and the output flange form an integral part, and the integral part is limited by the clamp spring for the first shaft and an external spline step of the spline shaft; the compression spring is sleeved at the spline part of the spline shaft, one end of the compression spring is limited by the retainer ring, and the other end of the compression spring is limited by the intermediate flange; the inner spline part of the middle flange is matched with the spline shaft, the piston disc is arranged in the inner cavity of the fixed cylinder body, the excircle of the piston disc is provided with a large sealing ring, the fixed cylinder body is connected with the sealing cover through a screw, and the inner circular groove of the sealing cover is provided with a small sealing ring to form an air cylinder with the middle groove of the fixed cylinder body; the outer circle of the middle flange is sleeved in the inner hole of the piston disc through a second bearing, the second bearing is limited by the inner hole step of the piston disc, the end face of the middle flange and a third shaft on the outer side through clamp springs, a locking ring fastened on the end face of the piston disc limits the bearing and the piston disc, and the locking ring is locked on the piston disc through a fastening screw, so that the limitation of the fixed cylinder body and the middle flange along the axis direction is realized; the fixed cylinder body is supported at the other end of the spline shaft through a third bearing and is limited by the third bearing, a clamp spring for a second shaft and a clamp spring for a second hole; the third bearing is limited by an inner hole step of the fixed cylinder body and a step at one end of a retainer ring, and the retainer ring is limited by a step at the other end of the spline shaft; the belt pulley and the output flange are fixed by a first bolt.

4. The normally closed clutch of claim 1 or 3, wherein a protective cover is provided at the end of the stationary cylinder block.