Disclosed is a disc motor with a brake function.

Abstract

The utility model discloses a disc type motor with brake function relates to disc type motor technical field, including casing, end cover, motor shaft, rotor, stator, spring, friction fixed disc, brake dynamic disc, connecting component and back cover, and motor shaft rotation is connected in the casing, and stator is set on the motor shaft and is fixed with the casing, and the rotor includes first rotor and second rotor, and first rotor is fixed on the motor shaft, and second rotor is along the axial sliding and is arranged on the motor shaft and is opposite fixed with the motor shaft in the circumferential direction, and spring is set on the motor shaft, and both ends of spring are respectively with first rotor and second rotor and abut, and connecting component is fixedly connected with second rotor, and brake dynamic disc is set between casing and back cover, and brake dynamic disc is set on the motor shaft and is fixedly connected with connecting component, and friction fixed disc is fixed in back cover and is opposite setting with brake dynamic disc. The utility model discloses brake and start synchronism is good, and simple structure, and low cost.

Description

Technical Field

[0001] This utility model relates to the field of disc motor technology, and in particular to a disc motor with a built-in braking function. Background Technology

[0002] Traditional axial flux disc motors can only rotate and drive, lacking braking functionality. In scenarios requiring braking, a separate external electromagnetic brake is typically used. During operation, the braking time of the electromagnetic brake must be adjusted and matched with the motor's start-up time; otherwise, they will become asynchronous, resulting in braking lag or premature braking. This affects the lifespan of the brake or motor, and in severe cases, can burn out the rectifier block of the electromagnetic brake. Furthermore, these motors are characterized by high cost and high failure rate. Utility Model Content

[0003] The purpose of this invention is to provide a disc motor with built-in braking function to solve the problems existing in the prior art. It has good synchronization between braking and starting, simple structure, and low cost.

[0004] To achieve the above objectives, this utility model provides the following solution:

[0005] This utility model provides a disc motor with a built-in braking function, including a housing, an end cover, a motor shaft, a rotor, a stator, a spring, a friction disc, a brake disc, a connecting component, and a rear cover. The end cover is fixed to one end of the housing, and the rear cover is fixed to the other end of the housing. The motor shaft is rotatably connected inside the housing. The stator and the rotor are disposed inside the housing. The stator is sleeved on the motor shaft and fixed to the housing. The rotor includes a first rotor and a second rotor, which are respectively located on both sides of the stator. The first rotor is fixed to the motor shaft. The second rotor is slidably mounted on the motor shaft along the axial direction and fixed relative to the motor shaft in the circumferential direction. The spring is sleeved on the motor shaft and located between the first rotor and the second rotor. The two ends of the spring abut against the first rotor and the second rotor respectively. The connecting member is fixedly connected to the second rotor and can move axially together with the second rotor. The brake disc is disposed between the housing and the rear cover. The brake disc is sleeved on the motor shaft and fixedly connected to the connecting member. The friction plate is fixed inside the rear cover and is disposed opposite to the brake disc.

[0006] In one embodiment, the motor shaft is provided with a first shoulder and a second shoulder, the first shoulder and the second shoulder being located between the first rotor and the second rotor. The first shoulder is used to axially limit the first rotor, and the second shoulder is used to axially limit the second rotor.

[0007] In one embodiment, the motor shaft is provided with a plurality of first V-shaped grooves along the circumferential direction, and the inner ring of the second rotor is provided with a second V-shaped groove along the circumferential direction. The first V-shaped grooves and the second V-shaped grooves correspond one-to-one. The first V-shaped grooves and the second V-shaped grooves together form a rectangular groove. The rectangular groove extends along the axial direction, and a plurality of cylindrical rollers are provided in the rectangular groove. Two adjacent cylindrical rollers are arranged in a cross shape.

[0008] In one embodiment, the connecting member includes a plurality of rectangular connecting keys, each of which is fixed to the inner ring of the second rotor along the circumferential direction. The motor shaft is provided with a plurality of keyways that correspond one-to-one with each of the rectangular connecting keys, and the rectangular connecting keys are slidably disposed in the keyways along the axial direction.

[0009] In one embodiment, the end of the rectangular connecting key away from the second rotor extends outward from the housing and is fixedly connected to the brake disc.

[0010] In one embodiment, the brake disc is fixed to the rectangular connecting key by bolts.

[0011] In one embodiment, one end of the motor shaft is rotatably connected to the end cover via a bearing, and the other end is rotatably connected to the housing via a bearing.

[0012] In one embodiment, the end cap is fixed to the housing by bolts.

[0013] In one embodiment, the rear cover is fixed to the housing by bolts.

[0014] In one embodiment, the friction plate has a through hole in the middle, and the friction plate, the brake moving plate, and the motor shaft are arranged coaxially.

[0015] The present invention achieves the following technical advantages over the prior art:

[0016] The disc motor with built-in braking function provided by this utility model, when energized, the brake moving disc separates from the friction fixed disc, the braking resistance disappears, and the motor starts. When the power is cut off, the brake moving disc comes into contact with the friction fixed disc under the action of the spring, realizing braking. The braking and starting are synchronized well, and the structure is simple and the cost is low. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the disc motor with built-in braking function in an embodiment of this utility model.

[0019] Figure 2 This is an exploded structural diagram of the motor shaft, the second rotor, and the brake disc in an embodiment of the present invention.

[0020] In the figure: 1-House, 2-End cover, 3-Motor shaft, 4-Stator, 5-Spring, 6-Friction plate, 7-Brake moving plate, 8-Connecting component, 9-Rear cover, 10-First rotor, 11-Second rotor, 12-First shoulder, 13-Second shoulder, 14-First V-groove, 15-Second V-groove, 16-Rectangular groove, 17-Cylindrical roller, 18-Rectangular connecting key, 19-Keyway, 20-Bearing, 21-Through hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] The purpose of this invention is to provide a disc motor with built-in braking function to solve the problems existing in the prior art. It has good synchronization between braking and starting, simple structure, and low cost.

[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] like Figures 1-2As shown, this embodiment provides a disc motor with a built-in braking function, including a housing 1, an end cover 2, a motor shaft 3, a rotor, a stator 4, a spring 5, a friction disc 6, a brake disc 7, a connecting member 8, and a rear cover 9. The end cover 2 is fixed to one end of the housing 1, and the rear cover 9 is fixed to the other end of the housing 1. The motor shaft 3 is rotatably connected inside the housing 1. The stator 4 and the rotor are disposed inside the housing 1. The stator 4 is sleeved on the motor shaft 3 and fixed to the housing 1. The rotor includes a first rotor 10 and a second rotor 11, which are located on both sides of the stator 4. The first rotor 10 is fixed to the motor shaft 3. On shaft 3, the second rotor 11 is slidably mounted on the motor shaft 3 along the axial direction and is fixed relative to the motor shaft 3 in the circumferential direction. The spring 5 is sleeved on the motor shaft 3 and located between the first rotor 10 and the second rotor 11. The two ends of the spring 5 abut against the first rotor 10 and the second rotor 11 respectively. The connecting member 8 is fixedly connected to the second rotor 11 and can move axially together with the second rotor 11. The brake moving disc 7 is disposed between the housing 1 and the rear cover 9. The brake moving disc 7 is sleeved on the motor shaft 3 and fixedly connected to the connecting member 8. The friction fixed disc 6 is fixed inside the rear cover 9 and is disposed opposite to the brake moving disc 7.

[0025] A mechanism for transmitting axial kinetic energy is incorporated inside the motor. When the disc motor stops working, the entire motor is de-energized, the magnetic field of the stator 4 disappears, and the thrust of the spring 5 pushes the second rotor 11 to move axially. The second rotor 11 drives the brake disc 7 to move axially through the connecting member 8. The brake disc 7 contacts the friction plate 6, generating frictional resistance and realizing the rotor braking function. When the motor is working, the stator 4 is energized and generates a magnetic field attraction force. The attraction force overcomes the thrust of the spring 5, and the second rotor 11 moves axially in the opposite direction. It also pulls the brake disc 7 away from the friction plate 6 through the connecting member 8, the braking resistance disappears, and the motor rotates. In this embodiment, the disc motor with built-in braking function, when energized, the brake disc 7 leaves the friction plate 6, the braking resistance disappears, and the motor starts. When de-energized, the brake disc 7 contacts the friction plate 6 under the action of the spring 5, realizing braking. The braking and starting synchronization is good, and the structure is simple and the cost is low.

[0026] In this embodiment, the motor shaft 3 is provided with a first shoulder 12 and a second shoulder 13, which are located between the first rotor 10 and the second rotor 11. The first shoulder 12 is used to axially limit the first rotor 10, and the second shoulder 13 is used to axially limit the second rotor 11. The first shoulder 12 ensures the axial position of the first rotor 10, and the second shoulder 13 ensures that after the motor is powered on, the second rotor 11 stops axially moving after it comes into contact with the second shoulder 13, thus ensuring that the second rotor 11 has a stable axial position during operation.

[0027] In this embodiment, the motor shaft 3 has multiple first V-shaped grooves 14 along the circumferential direction, and the inner ring of the second rotor 11 has second V-shaped grooves 15 along the circumferential direction. The first V-shaped grooves 14 and second V-shaped grooves 15 correspond one-to-one, and the first V-shaped grooves 14 and second V-shaped grooves 15 together form a rectangular groove 16. The rectangular groove 16 extends in the axial direction and has multiple cylindrical rollers 17 inside. Adjacent cylindrical rollers 17 are arranged in a cross shape. Through the cross-shaped cylindrical rollers 17, the second rotor 11 can transmit torque to the motor shaft 3 without affecting the axial movement of the second rotor 11.

[0028] In this embodiment, the connecting member 8 includes multiple rectangular connecting keys 18, each of which is fixed to the inner ring of the second rotor 11 along the circumferential direction. The motor shaft 3 is provided with multiple keyways 19, each corresponding to one of the rectangular connecting keys 18. The rectangular connecting keys 18 are slidably disposed in the keyways 19 along the axial direction. Through the sliding engagement between the rectangular connecting keys 18 and the keyways 19, the axial movement of the second rotor 11 can be guided, ensuring the stability of the axial movement of the second rotor 11.

[0029] In this embodiment, the end of the rectangular connecting key 18 furthest from the second rotor 11 extends outward from the housing 1 and is fixedly connected to the brake moving disc 7. The brake moving disc 7 is fixed to the rectangular connecting key 18 by bolts, which facilitates disassembly and assembly.

[0030] In this embodiment, one end of the motor shaft 3 is rotatably connected to the end cover 2 via a bearing 20, and the other end is rotatably connected to the housing 1 via a bearing 20, thus ensuring the stability of the motor shaft 3.

[0031] In this embodiment, the end cap 2 is fixed to the housing 1 by bolts, and the rear cover 9 is fixed to the housing 1 by bolts, which facilitates disassembly and assembly.

[0032] In this embodiment, a through hole 21 is provided in the middle of the friction plate 6, and the friction plate 6, the brake moving plate 7, and the motor shaft 3 are arranged coaxially. The diameter of the through hole 21 is larger than the end diameter of the motor shaft 3. When the brake moving plate 7 contacts the friction plate 6, the through hole 21 can prevent interference between the motor shaft 3 and the friction plate 6.

[0033] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A disc motor with built-in braking function, characterized by: The device includes a housing, end caps, a motor shaft, a rotor, a stator, a spring, a friction disc, a brake disc, a connecting member, and a rear cover. The end cap is fixed to one end of the housing, and the rear cover is fixed to the other end of the housing. The motor shaft is rotatably connected inside the housing. The stator and the rotor are disposed inside the housing. The stator is sleeved on the motor shaft and fixed to the housing. The rotor includes a first rotor and a second rotor, which are located on opposite sides of the stator. The first rotor is fixed to the motor shaft, and the second rotor is axially slidably disposed on the motor shaft and circumferentially fixed to it. The spring is sleeved on the motor shaft and located between the first rotor and the second rotor, with its two ends abutting against the first rotor and the second rotor, respectively. The connecting member is fixedly connected to the second rotor and can move axially together with it. The brake disc is disposed between the housing and the rear cover, sleeved on the motor shaft, and fixedly connected to the connecting member. The friction disc is fixed inside the rear cover and is disposed opposite to the brake disc.

2. The disc motor with built-in braking function according to claim 1, characterized in that: The motor shaft is provided with a first shoulder and a second shoulder, which are located between the first rotor and the second rotor. The first shoulder is used to limit the axial movement of the first rotor, and the second shoulder is used to limit the axial movement of the second rotor.

3. The disc motor with built-in braking function according to claim 1, characterized in that: The motor shaft has multiple first V-shaped grooves along the circumferential direction, and the inner ring of the second rotor has a second V-shaped groove along the circumferential direction. The first V-shaped grooves and the second V-shaped grooves correspond one-to-one. The first V-shaped grooves and the second V-shaped grooves together form a rectangular groove. The rectangular groove extends along the axial direction and has multiple cylindrical rollers inside. Two adjacent cylindrical rollers are arranged in a cross shape.

4. The disc motor with built-in braking function according to claim 1, characterized in that: The connecting component includes multiple rectangular connecting keys, each of which is fixed to the inner ring of the second rotor along the circumferential direction. The motor shaft is provided with multiple keyways that correspond one-to-one with each of the rectangular connecting keys, and the rectangular connecting keys are slidably disposed in the keyways along the axial direction.

5. The disc motor with built-in braking function according to claim 4, characterized in that: The rectangular connecting key extends outward from the housing at the end furthest from the second rotor and is fixedly connected to the brake disc.

6. The disc motor with built-in braking function according to claim 5, characterized in that: The brake disc is fixed to the rectangular connecting key by bolts.

7. The disc motor with built-in braking function according to claim 1, characterized in that: One end of the motor shaft is rotatably connected to the end cover via a bearing, and the other end is rotatably connected to the housing via a bearing.

8. The disc motor with built-in braking function according to claim 1, characterized in that: The end cap is fixed to the housing by bolts.

9. The disc motor with built-in braking function according to claim 1, characterized in that: The rear cover is fixed to the housing by bolts.

10. The disc motor with built-in braking function according to claim 1, characterized in that: The friction plate has a through hole in the middle, and the friction plate, the brake moving plate and the motor shaft are arranged coaxially.

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