CN200989393Y - Torque adjustable shaft coupling - Google Patents

Abstract

The utility model relates to a connecting component in the mechanical transmission field, in particular to a torque-adjusted coupling. A sleeve is provided with a plate-type sprocket wheel. An annular paired sprocket wheel is arranged between the driven sprocket wheel and the plate-type sprocket wheel. A frictional piece A is arranged between the plate-type sprocket wheel and the sleeve, and a frictional piece B is arranged between the plate-type sprocket wheel and a hold-down plate. A buffered element is arranged between the hold-down plate and a guidance plate. The outer side of the guidance plate is connected with an adjusting element positioned on the sleeve. The frictional piece A, the frictional piece B, the plate-type sprocket wheel, the hold-down plate, the buffered plate and the guidance plate are connected with sleeve. A overload protection is shaped between the working machine and the priming engine so that the occurred failure cannot cause the damages to the components, therefore, the components easily damaged need not to be displaced, which not only protects the safe and reliable operation for the equipment, but also improves the working efficiency, thereby being usable for the overload protection for the changed load in the chemical industry, the light industry and architectural machineries.

Description

Torque adjustable coupling

Technical field:

The utility model relates to a connection part in the field of mechanical transmission, in particular to a coupling.

Background technique:

There are many types of couplings, which are widely used in papermaking, glass, rubber and other chemical, light industry and construction machinery fields. However, the torque of the coupling sometimes changes during work. If there is no Overload protection, it is easy to burn out the drive motor, so the safety coupling came into being. In the mechanical design manual, there is a safety pin coupling, which uses a cylindrical pin as a load-bearing element. When the working load exceeds the allowable value, The cylindrical pin is automatically cut off, thereby cutting off the transmission between the working machine and the prime mover, which can play the role of overload protection, but because it is a rigid connection, the cylindrical pin must be reinstalled before restoring the transmission; because it is too sensitive to instantaneous overload, it is easy to cause Unnecessary damage to the cylindrical pin; when the limited torque changes, the corresponding cylindrical pin needs to be replaced, the process is cumbersome and time-consuming, and it is very inconvenient to use.

Invention content:

The utility model provides a torque-adjustable shaft coupling aimed at the above deficiencies, which forms an overload protection between the working machine and the prime mover, pre-calibrates the torque that can be transmitted by the coupling, and when the load increases, the two Slipping occurs automatically between the joints; once the load decreases, the synchronous rotation between the two joints can be automatically restored.

The technical scheme that the utility model adopts is:

A torque-adjustable shaft coupling includes a driven sprocket connected to the input shaft of a working machine and a sleeve connected to a prime mover motor, wherein a plate sprocket is connected to the sleeve, and the driven sprocket and the plate sprocket There are double-row chains sleeved, there is a friction plate A between the plate sprocket and the sleeve, there is a friction plate B between the plate sprocket and the pressure plate, the buffer is set between the pressure plate and the guide plate, and the outer side of the guide plate is fixedly connected with the sleeve the adjustment piece connection.

The plate sprocket, pressing plate and guide plate are all sleeved on the sleeve.

A shaft sleeve is also arranged between the plate sprocket and the sleeve.

The buffer adopts butterfly spring.

The adjustment piece includes an adjustment screw and an adjustment nut, and the adjustment screw connects with the guide plate through the adjustment nut.

The beneficial effect that the utility model can reach is:

1. The utility model adopts double-row chains to connect two sprockets, and the calibrated torque can be changed through the adjustable pressure change between the two friction plates and the plate sprocket to form overload protection between the working machine and the prime mover.

2. The utility model adopts friction connection, which will not cause damage to the components in case of failure, so there is no need to replace wearing parts, which not only improves the safety and reliability of equipment operation, but also improves work efficiency.

3. The utility model adopts buffer parts, which effectively alleviates the impact load in the process of starting, stopping and driving, and ensures the accuracy of calibration.

Description of drawings:

Fig. 1 is the structural representation of the utility model.

Detailed ways:

Below in conjunction with accompanying drawing, the utility model is further described:

As shown in Figure 1, the utility model includes a driven sprocket 1 connected with the input shaft of the working machine, a sleeve 2 connected on the prime mover motor, and a plate sprocket 11 is also set on the sleeve 2, and the driven chain There is an annular double-row chain 3 between the wheel 1 and the plate sprocket 11, there is an A friction plate 4 between the plate sprocket 11 and the sleeve 2, there is a B friction plate 10 between the plate sprocket 11 and the pressure plate, and a buffer 6 Set between the pressure plate 5 and the guide plate 9, the outer side of the guide plate 9 is connected with the adjustment piece installed on the sleeve 2, A friction plate 4, B friction plate 10, plate sprocket 11, pressure plate 5, buffer piece 6, guide plate 9 Both are socketed on the sleeve 2. A shaft sleeve is also provided between the plate sprocket 11 and the sleeve 2 . Buffer 6 adopts Belleville spring. The outside of the guide plate 9 and the top connection of the adjustment member installed on the sleeve 2 refer to the adjustment nut 8 fixed on the sleeve 2, and the adjustment screw 7 is installed on the adjustment nut 8, through the connection between the adjustment screw and the adjustment nut The thread fit tightens the adjusting screw against the guide plate.

The torque adjustable coupling includes a driven sprocket 1 connected to the input shaft of the working machine, and a sleeve 2 connected to the prime mover motor, wherein A friction plate 4 and plate sprocket 11 are sequentially set on the sleeve 2 , B friction plate 10, pressure plate 5, butterfly spring 6 and guide plate 9, guide plate 9 is top connected with the adjustment screw 7 passing through the adjustment nut 8, the driven sprocket and the plate sprocket are sleeved with a double chain 3, the plate sprocket Also be provided with axle sleeve between 11 and sleeve 2.

Before installing the torque adjustable coupling, according to the torque requirements of the working machine, by adjusting the gap between the guide plate and the nut, the pressure of the disc spring on the friction plate is changed, thereby changing the distance between the two friction plates and the plate sprocket. The friction force between them, calibrate the working torque, and then install it between the prime mover motor and the working machine. When the working torque is less than the torque we set, the friction torque generated on both sides of the plate sprocket is greater than the working torque. The double-row chain set on the two sprockets transmits the power to the working machine part; when the working torque is greater than the torque we set, there will be relative slippage between the plate sprocket and the two friction plates, so that the prime mover motor The sleeve rotates idly relative to the plate sprocket, thereby cutting off the transmission between the prime mover motor and the working machine, and protecting the safety of the drive motor. It can be used for overload protection of the prime mover when the load changes in chemical, light industry, and construction machinery.

Claims (4)

1. A torque adjustable shaft coupling, comprising a driven sprocket (1) connected to the input shaft of the working machine, and a sleeve (2) connected to the prime mover motor, characterized in that: the sleeve (2) Plate sprocket (11) is also set on the top, and annular double-row chain (3) is set between driven sprocket (1) and plate sprocket (11), plate sprocket (11) and sleeve (2) There is a friction plate (4) between them, there is a friction plate (10) between the plate sprocket (11) and the pressure plate, the buffer (6) is set between the pressure plate (5) and the guide plate (9), and the guide plate (9 ) is connected with the adjustment piece installed on the sleeve (2), A friction plate (4), B friction plate (10), plate sprocket (11), pressure plate (5), buffer piece (6), guide plate (9) are all socketed on the sleeve (2). 2. The torque-adjustable shaft coupling according to claim 1, characterized in that: a shaft sleeve is provided between the plate sprocket (11) and the sleeve (2). 3. The torque-adjustable shaft coupling according to claim 1, characterized in that: the buffer member (6) adopts a butterfly spring. 4. The torque-adjustable shaft coupling according to claim 1, characterized in that: the outer side of the guide plate (9) and the adjustment member mounted on the sleeve (2) are abutted against the sleeve (2). 2) An adjustment nut (8) is fixed on the top, and an adjustment screw (7) is installed on the adjustment nut (8), and the adjustment screw is tightened against the guide plate through the thread cooperation of the adjustment screw and the adjustment nut.

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