Active disc coupling with braking function

Abstract

The invention discloses an active disc coupling with a braking function. The device comprises an induction disc rotatably installed on a motor tail shaft, a magnetic steel disc fixed on the motor tail shaft and corresponding to the induction disc, and a brake used for braking the induction disc. The brake comprises a coil assembly installed on the motor tail cover, an armature installed on the coil assembly in a floating mode and a brake plate fixed to the armature, and the armature can move up and down along with power-off and power-on of the coil assembly so as to drive the brake plate to make contact with or be separated from the induction disc. The brake device has the advantages that when braking is needed, the brake plate is driven by the power-losing armature to directly brake the induction disc, then the motor shaft is indirectly braked through the hindering effect generated by magnetic coupling between the induction disc and the magnetic steel disc, the braking process is smoother, the motor shaft can rotate again after bearing large torque instead of being locked, and the braking effect is better. Therefore, equipment is prevented from being damaged due to the fact that torque exists but the motor shaft cannot rotate, and actual use requirements are better met.

Description

Technical Field

[0001] This invention relates to a coupling, specifically a disc coupling with active braking function. Background Technology

[0002] The braking system is an indispensable part of an electric motor. In special circumstances, it can quickly stop the equipment to ensure the safety of the equipment and personnel. Traditional motor braking is generally power-off braking. When the system loses power, the brake will pop up the brake pads, and the motor will be stopped quickly by the friction between the brake pads and the brake plate. This method has a relatively large braking torque, and once the braking function is activated, the motor can basically no longer move.

[0003] However, practical engineering applications have many requirements for motor braking. Sometimes the braking process needs to be smooth and slow, and sometimes the motor needs to be able to reverse when subjected to an external force exceeding a certain value in the power-off state. For example, in shore power cable reels, when the reel is released to the working position, the cable length is relatively fixed. When the ship is unloading or the tide is rising, the cable will bear greater tension. When the tension exceeds a certain value, in order to ensure that the cable is not pulled out, it needs to be able to be pulled out smoothly, and the amount of tension when pulled out needs to be adjustable. However, traditional power-off braking systems cannot achieve this function. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a disc coupling with active braking function that allows the motor to rotate passively after braking, has a smooth braking process, and allows for rapid adjustment of braking torque.

[0005] To solve the above-mentioned technical problems, the present invention provides an active disc coupling with braking function, comprising an induction disc rotatably mounted on the tail shaft of a motor, a magnetic steel disc fixed on the tail shaft and corresponding to the induction disc, and a brake for braking the induction disc; the brake comprises a coil assembly mounted on the tail cover of the motor, an armature floatingly mounted on the coil assembly, and a brake plate fixed on the armature, wherein the armature can move up and down as the coil assembly is de-energized and energized, thereby causing the brake plate to contact and separate from the induction disc.

[0006] The induction plate includes an induction plate mounting plate rotatably mounted on the middle of the motor tail shaft via bearings, and an induction plate fixedly mounted on the upper surface of the induction plate mounting plate.

[0007] The magnet disk includes a magnet disk frame fixed to the upper part of the motor tail shaft by a key connection, a magnet mounting plate mounted on the magnet disk frame by a torque adjusting screw, and a magnet fixedly mounted on the lower surface of the magnet mounting plate. The position of the magnet corresponds to the induction sheet.

[0008] The torque adjusting screw is screwed with locking nuts located on the upper and lower sides of the magnet plate, respectively. The torque adjusting screw can adjust the distance between the magnet and the sensing plate by cooperating with the locking nuts.

[0009] A brake mounting plate is provided on the motor tail cover, and the coil assembly and the armature are mounted on the brake mounting plate; a release handle for manually releasing the brake in the event of power failure is provided on the side wall of the coil assembly.

[0010] The coil assembly has multiple mounting slots and springs are installed in them. The armature is mounted on the coil assembly by the springs and a movable gap is left between them. The coil assembly and the armature are both provided with spring cotter pins to guide the movement of the armature.

[0011] The motor tail shaft has a square structure at its end, on which an emergency handle with a matching square groove can be inserted.

[0012] The advantages of this invention are: (1) When braking is required, the armature that is de-energized first drives the brake plate to directly brake the induction plate, and then the motor shaft is indirectly braked by the resistance generated by the magnetic coupling between the induction plate and the magnetic steel plate. Compared with the traditional method of using friction braking, this design makes the braking process smoother and allows the motor shaft to rotate again after being subjected to a large torque instead of locking up, thereby avoiding damage to the equipment due to torque but the motor shaft being unable to rotate. It is more suitable for actual use needs. In addition, non-contact braking can also reduce the friction loss between the induction plate and the magnetic steel plate, thereby improving the service life of the equipment. (2) The magnet mounting plate is fixed to the outer circumference of the magnet plate frame by multiple torque adjustment screws. Under the action of the torque adjustment screws and locking nuts, the operator can directly adjust the distance between the magnet and the induction plate from the outside, thereby adjusting the magnitude of the braking torque without disassembling the entire equipment. The torque adjustment is convenient and quick. (3) A release handle is provided on the side wall of the coil assembly to manually release the brake in the event of power failure. At the same time, the end of the motor tail shaft is designed as a square structure, on which an emergency handle can be inserted. After manually releasing the brake using the release handle, the operator can also manually rotate the motor tail shaft through the emergency handle. This design further improves the operability in practical applications. Attached Figure Description

[0013] Figure 1 This is the front view of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 for Figure 2 Enlarged view of point A; Figure 4 This is a schematic diagram of the end face of the square structure of the motor tail shaft of the present invention; Figure 5 This is a perspective view of the emergency handle of the present invention. Detailed Implementation

[0014] The active braking disc coupling of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] As shown in the figure, the active disc coupling with braking function of the present invention includes a brake mounted on the motor tail cover 4 and located at the lower part of the motor tail shaft 1 passing through the middle of the motor tail cover 4, an induction disc 2 located above the brake and in the middle of the motor tail shaft 1, and a magnet disc 3 located above the induction disc 2 and in the upper part of the motor tail shaft 1. The end of the motor tail shaft 1 is designed with a square structure, on which an emergency handle 22 with a matching square groove 21 can be inserted.

[0016] The brake includes a brake mounting plate 16 bolted to the motor tail cover 4. The upper end face of the motor tail cover 4 and the lower end face of the brake mounting plate 16 are respectively designed with mutually cooperating convex and concave stop mouths to ensure their coaxiality. The upper end face of the brake mounting plate 16 forms a recessed stepped surface, in which a coil assembly 5 is placed. The coil assembly 5 has multiple mounting slots 17, and springs 18 are installed in the mounting slots 17. An armature 6 electrically connected to the coil assembly 5 is floatingly mounted on the top of the coil assembly 5 through the springs 18. A brake plate 7 for braking the upper induction disc 2 is bolted to the top of the armature 6.

[0017] By default, a clearance 19 exists between the coil assembly 5 and the armature 6. When the coil assembly 5 is de-energized, the armature 6 separates from it under the action of the spring 18, forming the clearance. When the coil assembly 5 is energized, the armature 6 compresses the spring 18 and engages with it to eliminate the clearance. A release handle 8 is provided on the side wall of the coil assembly 5 for manually releasing the brake in the de-energized state. A stepped through-hole is formed on one edge of the armature 6, and threaded holes are formed at corresponding positions on the coil assembly 5 and the brake mounting plate 16, allowing the radial movement of the armature 6, coil assembly 5, and brake mounting plate 16 to be restricted by bolts, while the axial movement of the armature 6 remains unaffected. A through-hole is formed on the other edge of the armature 6, and a blind hole is formed at the corresponding position on the coil assembly 5. A spring cotter pin 20, which guides the movement of the armature 6, is inserted into both holes.

[0018] The induction plate 2 includes an induction plate mounting plate 9 rotatably mounted on the middle of the motor tail shaft 1 via upper and lower bearings, and an induction plate 10 fixed on the upper surface of the induction plate mounting plate 9. The lower bearing is located on the shoulder of the motor tail shaft 1, and a spacer ring is placed on top of it before the upper bearing is installed. Grooves are opened above the upper bearing on the motor tail shaft 1 and the induction plate mounting plate 9 respectively, and a retaining spring is installed in the groove to restrict the axial movement of the induction plate mounting plate 9, thereby ensuring the friction force when it contacts the brake plate 7.

[0019] The magnetic steel disc 3 includes a magnetic steel disc frame 11 that is fixed to the upper part of the motor tail shaft 1 by a key connection and reinforced by fastening bolts. A retaining spring is installed on the top of the magnetic steel disc frame 11 to limit its axial movement. A magnetic steel mounting plate 13 is fixed on the outer circumference by multiple torque adjusting screws 12. A magnet 14 corresponding to the position of the sensing plate 10 is fixed on the lower surface of the magnetic steel mounting plate 13. Locking nuts 15 located on the upper and lower sides of the magnetic steel disc frame 11 are screwed onto the torque adjusting screws 12. The torque adjusting screws 12 can adjust the distance between the magnet 14 and the sensing plate 10 by cooperating with the locking nuts 15, that is, adjust the braking torque of the brake.

[0020] In actual use, when the coil assembly 5 is energized, it generates electromagnetic force to attract the armature 6. The magnet 3 and the induction plate 2 rotate normally. When it is necessary to brake the motor tail shaft 1, the power supply to the coil assembly 5 is disconnected, the electromagnetic force disappears, and the armature 6 moves upward under the action of the spring 18, so that the brake plate 7 is tightly attached to the bottom surface of the induction plate mounting plate 9. The induction plate mounting plate 9 gradually decelerates, and under the action of magnetic coupling, it forms a resistance tendency to the magnet 3, thereby causing the motor tail shaft 1, which is fixedly connected to the magnet 3, to gradually decelerate and eventually stop. At this time, the operator can use the release handle 8 to manually release the brake, thereby avoiding damage to the equipment due to torque but the motor shaft cannot rotate. The operator can also manually rotate the motor tail shaft 1 through the emergency handle 22.

[0021] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A disc coupling with active braking function, characterized in that: The device includes an induction disk (2) rotatably mounted on the tail shaft (1) of the motor, a magnet disk (3) fixed on the tail shaft (1) and corresponding to the induction disk (2), and a brake for braking the induction disk (3); the brake includes a coil assembly (5) mounted on the tail cover (4) of the motor, an armature (6) floatingly mounted on the coil assembly (5), and a brake plate (7) fixed on the armature (6). The armature (6) can move up and down as the coil assembly (5) is de-energized and energized, thereby causing the brake plate (7) to contact and separate from the induction disk (2).

2. The disc coupling with active braking function according to claim 1, characterized in that: The induction plate (2) includes an induction plate mounting plate (9) rotatably mounted on the middle of the motor tail shaft (1) via a bearing and an induction plate (10) fixedly mounted on the upper surface of the induction plate mounting plate (9).

3. The disc coupling with active braking function according to claim 2, characterized in that: The magnet disk (3) includes a magnet disk frame (11) fixed to the upper part of the motor tail shaft (1) by a key connection, a magnet mounting plate (13) mounted on the magnet disk frame (11) by a torque adjusting screw (12), and a magnet (14) fixedly mounted on the lower surface of the magnet mounting plate (13). The position of the magnet (14) corresponds to that of the induction plate (10).

4. The disc coupling with active braking function according to claim 3, characterized in that: The torque adjusting screw (12) is screwed with locking nuts (15) located on the upper and lower sides of the magnet plate (11). The torque adjusting screw (12) can adjust the distance between the magnet (14) and the induction plate (10) by cooperating with the locking nuts (15).

5. The active braking disc coupling according to any one of claims 1-4, characterized in that: A brake mounting plate (16) is provided on the motor tail cover (4), and the coil assembly (5) and the armature (6) are mounted on the brake mounting plate (16); a release handle (8) for manually releasing the brake in the power failure state is provided on the side wall of the coil assembly (5).

6. The disc coupling with active braking function according to claim 5, characterized in that: The coil assembly (5) has multiple mounting slots (17) and springs (18) are provided therein. The armature (6) is mounted on the coil assembly (5) by the springs (18) and there is a movable gap (19) between them. The coil assembly (5) and the armature (6) are provided with spring cotter pins (20) for guiding the movement of the armature (6).

7. The disc coupling with active braking function according to claim 1, characterized in that: The motor tail shaft (1) has a square structure at its end, on which an emergency handle (22) with a matching square groove (21) can be inserted.

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