Flexible torque limiting clutch

Abstract

The present invention discloses an elastic torque-limiting clutch, which belongs to the field of mechanical transmission. It includes a connecting disk and a transmission shaft with an annular groove on the outer circumference for transmitting power, a spring that can drive the connecting disk to rotate is wound in the annular groove of the transmission shaft, an axial hole that can be inserted into the spring end is provided at a position corresponding to the spring end on the connecting disk, a step that can support the spring is provided on the outer side of the annular groove of the transmission shaft, one end of the spring is bent into a right angle and abuts on the step of the transmission shaft, and the other end of the spring is bent into an acute angle and inserted into the axial hole of the connecting disk. The present invention has a simple structure, and when the transmission wheel or the transmission wheel connected to the connecting disk by screws fails due to excessive load, the power can still be transmitted to other transmission mechanisms by the transmission shaft, and the operation of other parts of the equipment will not be affected by the damage of one transmission mechanism. The operator can independently choose the equipment maintenance time to avoid losses caused by incoherent equipment operation.

Description

Technical Field

[0001] The invention belongs to transmission equipment, and in particular relates to a power transmission clutch. Background Art

[0002] In the field of mechanical transmission, commonly used transmission mechanisms include gear transmission, pulley transmission, and synchronous pulley transmission. Among them, pulley transmission and synchronous pulley transmission are suitable for transmission over long distances with relatively large center distances. In addition, pulley transmission is prone to slippage during power transmission, resulting in low transmission efficiency. Therefore, in high-precision, high-speed power transmission with limited space, gear transmission is generally selected. Since gear transmission is a rigid transmission and cannot be overload protected, when the load is too large, it will cause damage to the drive equipment or damage to components such as bearings. Inconvenient maintenance will also seriously affect production progress. Summary of the invention

[0003] The purpose of the present invention is to solve the problems existing in the background technology and to propose an elastic torque-limiting clutch with an overload protection function.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is:

[0005] The elastic torque-limiting clutch comprises a connecting disk and a transmission shaft with an annular groove on the outer circumference for transmitting power, wherein a spring capable of driving the connecting disk to rotate is wound in the annular groove of the transmission shaft.

[0006] A further improvement of the present invention is that an axial hole into which the spring end can be inserted is provided at a position corresponding to the spring end on the connecting disk, a step that can support the spring is provided on the outer side of the annular groove of the transmission shaft, one end of the spring is bent into a right angle and abuts against the step of the transmission shaft, and the other end of the spring is bent into an acute angle and inserted into the axial hole of the connecting disk.

[0007] A further improvement of the present invention is that the fan-shaped angle formed by the spring being wound in the annular groove of the transmission shaft is 270-300°.

[0008] A further improvement of the present invention is that the diameter of the steel wire of the spring is 8 mm.

[0009] A further improvement of the present invention is that the inner end surface of the annular groove of the transmission shaft is 0.2 mm lower than the corresponding end surface of the connecting disk.

[0010] A further improvement of the present invention is that a bearing is arranged in the center hole of the connecting plate, and the center hole of the bearing is interference fit with the transmission shaft.

[0011] A further improvement of the present invention is that: a plurality of through holes are evenly arranged on the end surface of the connecting plate, and screws are passed through the through holes.

[0012] A further improvement of the present invention is that: the connecting disk is a transmission wheel, and an axial hole into which the spring end can be inserted is arranged at a position corresponding to the spring end on the transmission wheel; a spacer sleeve with an annular groove on the outer circumference fixedly connected to the transmission shaft is arranged between the transmission wheel and the transmission shaft; a spring capable of driving the transmission wheel to rotate is arranged in the annular groove of the spacer sleeve, and a step capable of supporting the spring is arranged on the outside of the annular groove of the spacer sleeve; one end of the spring is bent into a right angle and abuts against the step of the spacer sleeve, and the other end is bent into an acute angle and inserted into the axial hole of the transmission wheel.

[0013] A further improvement of the present invention is that the inner hole of the spacer is a hexagonal hole, the transmission shaft is a hexagonal shaft, and the hexagonal hole of the spacer is clearance-matched with the hexagonal shaft.

[0014] A further improvement of the present invention is that the transmission wheel is a gear.

[0015] A further improvement of the present invention is that the acute angle of the bend of the other end of the spring is 20-70°.

[0016] Due to the adoption of the above technical solution, the technical progress achieved by the present invention is:

[0017] The present invention has a simple structure. When the transmission wheel or other transmission parts connected by the connecting plate through screws fail due to excessive load, power can still be transmitted to other transmission mechanisms by the transmission shaft. The operation of other parts of the equipment will not be affected by the damage of one transmission mechanism. The equipment user can independently choose the equipment maintenance time to avoid losses caused by discontinuous equipment operation.

[0018] A spring is arranged in the annular groove of the transmission shaft, one end of the spring is bent into a right angle and rests on the step of the transmission shaft, and the other end of the spring is bent into an acute angle and inserted into the axial hole of the connecting disk, so that the power of the transmission shaft can be transmitted to the connecting disk; at the same time, when the spring is selected to transmit power, when the load is too large, the spring can be detached from the axial hole of the connecting disk, and the bent part is wrapped around the outer circumference of the annular groove of the transmission shaft without affecting the continued rotation of the transmission shaft, and the power can continue to be transmitted to other parts of the equipment without affecting the continued operation of other parts.

[0019] The fan-shaped angle formed by the spring wound in the annular groove of the transmission shaft is 270-300 degrees, ensuring that the power of the transmission shaft can be transmitted to the connecting plate or the transmission wheel.

[0020] The spring wire diameter is selected to be 8mm in order to correspond to the corresponding load.

[0021] The inner end face of the annular groove of the transmission shaft is 0.2 mm lower than the end face of the connecting plate. When the transmission is overloaded, the spring is easily reset and wound in the annular groove of the transmission shaft.

[0022] A bearing is arranged in the hole of the connecting plate, and the inner hole of the bearing has an interference fit with the transmission shaft, which can prevent the transmission shaft from rotating while the connecting plate does not rotate after the connecting plate is overloaded, causing serious frictional heat and damaging the entire equipment.

[0023] A plurality of through holes are evenly arranged on the end surface of the connecting plate, and screws are passed through the through holes. The screws are used to connect other transmission parts to transmit the power with overload protection.

[0024] The connecting disk itself can be a transmission wheel. An axial hole is arranged on the end face of the transmission wheel for inserting one end of a spring with a bend. A spacer is arranged between the transmission wheel and the transmission shaft. An annular groove for installing the spring and a plane against the other bent end of the spring are arranged on the outer circumference of the spacer. The spacer is fixedly connected to the transmission shaft. The power of the transmission shaft is transmitted to the transmission wheel through the spacer and the spring, which can solve the problem that the annular groove and the spring abutment plane are difficult to process when the transmission shaft is long.

[0025] The inner hole of the spacer is a hexagonal hole, and the transmission shaft is a hexagonal shaft. The clearance between the two is matched to transmit power. The hexagonal shaft is easy to process, which can reduce the processing cost.

[0026] The transmission wheel is a gear, which has high transmission efficiency, can withstand high-speed rotation, saves space and occupies a small volume.

[0027] The other end of the spring is bent at an acute angle of 20-70°, so that the spring can be easily disengaged from the axial hole when overloaded. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a front structural schematic diagram of the present invention;

[0029] Figure 2 for Figure 1 Middle AA section view;

[0030] Figure 3 It is the structural diagram of the spring;

[0031] Figure 4 It is a schematic diagram of the structure of the transmission shaft;

[0032] Figure 5 It is a front structural schematic diagram of another embodiment of the present invention;

[0033] Figure 6 for Figure 5 Middle AA section view;

[0034] Figure 7 It is a schematic diagram of the structure of the spacer.

[0035] Among them: 1, connecting plate 2, spring 3, transmission shaft 4, bearing 5, screw 6, transmission wheel 7, spacer 8, hexagonal shaft. DETAILED DESCRIPTION

[0036] The present invention is further described in detail below with reference to the accompanying drawings and embodiments:

[0037] Flexible torque-limiting clutch, such as Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, it includes a connecting disk 1 and a transmission shaft 3. The transmission shaft 3 is a power input shaft. An annular groove is arranged on the outer circumference of the transmission shaft 3. A spring 2 is arranged in the annular groove. The spring 2 is used to drive the connecting disk 1 to rotate.

[0038] An axial hole is set on the end surface of the connecting disk 1 at a position corresponding to the end of the spring 2, and the axial hole is used to insert a bent end of the spring. A step supporting the spring is set on the outer side of the annular groove of the transmission shaft 3. One end of the spring 2 is bent into a right angle and abuts against the step of the transmission shaft 3, and the other end of the spring 2 is bent into an acute angle and inserted into the axial hole of the connecting disk 1. The acute angle of the other end of the spring 2 is 20-70°, and the fan-shaped angle formed by the spring 2 wrapped in the annular groove of the transmission shaft 3 is 270-300°.

[0039] A bearing 4 is arranged in the center hole of the connecting plate 1 , and the center hole of the bearing 4 is interference fit with the transmission shaft 3 .

[0040] The inner end surface of the annular groove of the transmission shaft 3 is 0.2 mm lower than the corresponding end surface of the connecting plate 1, and the diameter of the steel wire of the spring 2 is 8 mm.

[0041] A plurality of through holes are evenly arranged on the end surface of the connecting plate 1 , and screws 5 are passed through the through holes. The screws 5 are used to connect other transmission parts, such as gears, synchronous pulleys, etc.

[0042] exist Figure 5 , Figure 6 , Figure 7 In another embodiment shown, the connecting disk 1 is a transmission wheel 6, an axial hole is arranged on the end face of the transmission wheel 6, the axial hole is arranged at a position corresponding to the end of the spring 2, the axial hole is used to insert a bent end of the spring, a spacer 7 is arranged between the transmission wheel 6 and the transmission shaft 3, the inner hole of the spacer 7 is a hexagonal hole, the transmission shaft 3 is a hexagonal shaft 8, the hexagonal hole of the spacer 7 is clearance-matched with the hexagonal shaft 8, an annular groove is arranged on the outer circumference of the spacer 7, a spring 2 is arranged in the annular groove of the spacer 7, the spring 2 is used to drive the transmission wheel 6 to rotate, a step capable of supporting the spring 2 is arranged on the outer side of the annular groove of the spacer 7, one end of the spring 2 is bent into a right angle and abuts on the step of the spacer 7, the other end is bent into an acute angle and inserted into the axial hole of the transmission wheel 6, and the other end of the spring 2 is bent into an acute angle at an angle of 270-300°.

[0043] The axial holes for mounting the bent ends of the springs 2 on the end surfaces of the connecting disk 1 and the transmission wheel 6 are arc-shaped waist-shaped holes, which can more conveniently insert the ends of the springs 2 .

[0044] The transmission wheel 6 is preferably a gear.

Claims

1. Elastic torque-limiting clutch, characterized in that: It comprises a connecting disk (1) and a transmission shaft (3) with an annular groove on its outer circumference for transmitting power, wherein a spring (2) capable of driving the connecting disk (1) to rotate is wound in the annular groove of the transmission shaft (3); An axial hole into which the spring end can be inserted is provided at a position on the connection disk (1) corresponding to the end of the spring (2); a step capable of supporting the spring is provided on the outer side of the annular groove of the transmission shaft (3); one end of the spring (2) is bent at a right angle and abuts against the step of the transmission shaft (3); and the other end of the spring (2) is bent at an acute angle and inserted into the axial hole of the connection disk (1); The connecting disk (1) is a transmission wheel (6); an axial hole into which the spring end can be inserted is arranged at a position corresponding to the spring (2) end on the transmission wheel (6); a spacer (7) with an annular groove on the outer circumference fixedly connected to the transmission shaft (3) is arranged between the transmission wheel (6) and the transmission shaft (3); a spring (2) capable of driving the transmission wheel (6) to rotate is arranged in the annular groove of the spacer (7); a step capable of supporting the spring (2) is arranged on the outer side of the annular groove of the spacer (7); one end of the spring (2) is bent at a right angle to abut against the step of the spacer (7), and the other end is bent at an acute angle to be inserted into the axial hole of the transmission wheel (6).

2. The elastic torque limiting clutch according to claim 1, characterized in that: The spring (2) is wound around the annular groove of the transmission shaft (3) to form a sector angle of 270-300°.

3. The elastic torque limiting clutch according to claim 1, characterized in that: The steel wire diameter of the spring (2) is 8 mm.

4. The elastic torque limiting clutch according to claim 1, characterized in that: The inner end surface of the annular groove of the transmission shaft (3) is 0.2 mm lower than the corresponding end surface of the connecting disk (1).

5. The elastic torque-limiting clutch according to claim 1, characterized in that: A bearing (4) is arranged in the center hole of the connecting plate (1), and the center hole of the bearing (4) is interference-fitted with the transmission shaft (3).

6. The elastic torque-limiting clutch according to claim 1, characterized in that: A plurality of through holes are evenly arranged on the end surface of the connection plate (1), and screws (5) are inserted into the through holes.

7. The elastic torque-limiting clutch according to claim 1, characterized in that: The inner hole of the spacer (7) is a hexagonal hole, the transmission shaft (3) is a hexagonal shaft (8), and the hexagonal hole of the spacer (7) and the hexagonal shaft (8) are clearance-matched.

8. The elastic torque-limiting clutch according to claim 1, characterized in that: The transmission wheel (6) is a gear.

9. The elastic torque-limiting clutch according to claim 1, characterized in that: The other end of the spring (2) is bent at an acute angle of 20-70°.

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