CN212028393U

CN212028393U - External rotor motor braking system and low-speed movement device with same

Info

Publication number: CN212028393U
Application number: CN202020785090.0U
Authority: CN
Inventors: 张以军
Original assignee: Shenzhen Zhongling Technology Co ltd
Current assignee: Shenzhen Zhongling Technology Co ltd
Priority date: 2020-05-12
Filing date: 2020-05-12
Publication date: 2020-11-27
Anticipated expiration: 2030-05-12

Abstract

The utility model relates to an external rotor electric machine braking system, it includes external rotor electric machine, drive mechanism, slave unit and arresting gear, drive mechanism is including being fixed in the wide footpath driving medium on external rotor electric machine's the rotor and with the narrow footpath driving medium of wide footpath driving medium with the same linear velocity interlock, slave unit includes the support frame and wears to locate on the support frame and with narrow footpath driving medium coaxial coupling's driven shaft, arresting gear sets up on the support frame and is used for controlling the driven shaft locking or release in the support frame. The utility model has the advantages of reduce brake cost to reduce braking system's size and weight.

Description

External rotor motor braking system and low-speed movement device with same

Technical Field

The utility model belongs to the technical field of the motor technique and specifically relates to an use low-speed external rotor electric machine braking system of little retaining member and have low-speed telecontrol equipment of this system.

Background

At present, the outer rotor motor is widely applied to the robot industry, the development is faster and faster, and the requirement of the outer rotor motor on the locking technology is higher. The traditional motor braking system locks a rotating shaft through a power-off brake, locks a motor outer cover for an outer rotor motor, has larger volume when the power-off brake torque is larger, and has huge brake volume and extremely high cost if the power-off brake corresponding to the torque is selected when the power-off brake is required to be added on a large-torque motor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a brake system of external rotor electric machine that utilizes little arresting gear to brake to big moment of torsion external rotor electric machine has the size that reduces brake cost and reduce brake system and the advantage of weight.

The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:

the outer rotor motor brake system comprises an outer rotor motor, a transmission mechanism, a driven device and a brake device, wherein the transmission mechanism comprises a wide-diameter transmission part fixed on a rotor of the outer rotor motor and a narrow-diameter transmission part linked with the wide-diameter transmission part at the same linear velocity, the driven device comprises a support frame and a driven shaft penetrating through the support frame and coaxially connected with the narrow-diameter transmission part, and the brake device is arranged on the support frame and used for controlling the driven shaft to be locked or released on the support frame.

Through adopting above-mentioned technical scheme, the rotor and the wide footpath driving medium of external rotor electric machine are fixed mutually, therefore both will take place synchronous rotation. The wide-diameter transmission part and the narrow-diameter transmission part are linked together at the same linear speed, and the radius of the wide-diameter transmission part is larger than that of the narrow-diameter transmission part, so that the large-torque low-rotation-speed rotation of the wide-diameter transmission part is converted into the small-torque high-rotation-speed rotation of the narrow-diameter transmission part. The driven shaft and the narrow-diameter transmission part rotate synchronously, so that the rotor of the outer rotor motor can be prevented from continuously rotating by braking the driven shaft. The braking device is arranged on the support frame, and the driven shaft is fixed or released on the support frame, so that the small-torque brake control of the large-torque outer rotor motor is realized. Since the outer rotor motor is suitable for the low-speed field, the large-torque low-rotation-speed rotation is converted into the small-torque low-rotation-speed rotation in the field, and the transmission is not easily damaged. Because turn into the brake of low moment of torsion with big moment of torsion, consequently compare in traditional external rotor motor braking system who sets up on the stator, arresting gear can make littleer, effectively reduces the cost problem that big moment of torsion brake brought. Meanwhile, the brake system is simple in structure, easy to assemble, flexible and changeable in structure and capable of being adapted to the outer rotor motor in various environments.

The present invention may be further configured in a preferred embodiment as: the braking device is a power-off brake for connecting the support frame and the driven shaft.

By adopting the technical scheme, the power-off brake is a friction plate type brake which is electromagnetically separated when power is off and is pressed by a spring, so that the quick parking and the accurate positioning are realized, and the power-off brake has the characteristics of small axial size and enough large braking torque.

The present invention may be further configured in a preferred embodiment as: the braking device comprises a friction plate which is fixed on the driven shaft and synchronously rotates with the driven shaft, a braking plate which is sleeved on the driven shaft and moves in the axial direction of the driven shaft, and a control mechanism which is used for controlling the braking plate to abut against or be far away from the friction plate so as to lock or release the outer rotor motor.

Through adopting above-mentioned technical scheme, friction disc and driven shaft synchronous revolution, when the friction disc was locked by the braking piece, the external rotor motor will be locked simultaneously.

The present invention may be further configured in a preferred embodiment as: the control mechanism comprises an electromagnetic adsorption piece and a return spring, wherein the electromagnetic adsorption piece is arranged on a support frame on one side, far away from the friction plate, of the brake piece, the return spring is connected with the brake piece and the support frame, the brake piece is ferromagnetic, the return spring is used for enabling the brake piece to be abutted against the friction plate, and the electromagnetic adsorption piece is electrified to control the brake piece to be separated from the friction plate.

Through adopting above-mentioned technical scheme, under the electromagnetism adsorption member on-state, the braking piece is adsorbed on the electromagnetism adsorption member, that is to say, the braking piece is kept away from the friction disc this moment, and the rotation of friction disc and driven shaft does not receive the hindrance, and the external rotor electric machine normally works. Under the power-off state of the electromagnetic adsorption piece, the reset spring is used for abutting the brake piece on the friction piece, at the moment, the friction piece generates damping on the rotation of the brake piece so as to lock the brake piece and the driven shaft, and the rotation of the rotor of the outer rotor motor is further locked through the action of the transmission mechanism.

The present invention may be further configured in a preferred embodiment as: the wide-diameter transmission part and the narrow-diameter transmission part are gear discs and are meshed with each other.

The present invention may be further configured in a preferred embodiment as: the wide-diameter transmission part and the narrow-diameter transmission part are both wheel discs and are driven through belts.

The present invention may be further configured in a preferred embodiment as: the wide-diameter transmission part and the narrow-diameter transmission part are both gear discs and are driven by chain.

By adopting the technical scheme, the change of various proportional torques can be realized, and the positions of the driven device and the braking device are set to have higher degree of freedom.

The present invention may be further configured in a preferred embodiment as: and the gear disc is connected to the rotor of the outer rotor motor through bolts.

Through adopting above-mentioned technical scheme, the toothed disc passes through the bolt with the external rotor motor and fixes mutually, and the moment of rotor will be stable transmit to the toothed disc on.

The present invention may be further configured in a preferred embodiment as: the supporting frame comprises two fixed plates, a baffle and a connecting plate, wherein the two fixed plates are both positioned at the same side of the baffle and are both arranged in parallel with the baffle; the driven shaft is a round shaft, penetrates through the two fixed plates and is connected with the fixed plates through bearings; the narrow-diameter transmission part is positioned between the two fixed plates and is in key connection with the driven shaft, the friction plate and the brake plate are both positioned between the fixed plate and the baffle plate in the middle of the support frame, and the friction plate is close to the baffle plate compared with the brake plate; the electromagnetic adsorption piece is arranged on the fixing plate in the middle of the support frame.

The above utility model discloses an above-mentioned utility model purpose secondly can realize through following technical scheme:

a low-speed movement device comprises a hub and the outer rotor motor braking system, wherein the outer rotor motor is arranged in the hub.

Through adopting above-mentioned technical scheme, this external rotor electric machine sets up in wheel hub, provides power for wheel hub's motion, because wheel hub low-speed motion, when consequently changing the high moment of torsion low rotational speed rotation of external rotor electric machine into low moment of torsion high rotational speed rotation, brake the driven shaft and be difficult to make drive mechanism appear phenomenons such as collapsing tooth and disconnected area to realize the scheme of little moment of torsion brake braking big torque electric machine, reduce brake cost, brake size and brake weight, leave the space in advance for the installation of other devices.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the small-torque brake is used for controlling the large-torque outer rotor motor, so that the brake cost is reduced, and the size and the weight of a brake system are reduced;

2. simple structure, easy assembly and flexible and changeable structure.

Drawings

Fig. 1 is an overall schematic view of an outer rotor motor brake system in a first preferred embodiment;

fig. 2 is an exploded view of an outer rotor motor brake system in a second preferred embodiment;

fig. 3 is an overall schematic view of an outer rotor motor brake system in a fourth preferred embodiment;

fig. 4 is an overall schematic view of an outer rotor motor brake system in a fifth preferred embodiment.

In the figure, the position of the upper end of the main shaft,

1. an outer rotor motor;

2. a driven device; 21. a support frame; 211. a fixing plate; 212. a baffle plate; 213. a connecting plate; 22. a driven shaft;

3. a transmission mechanism; 31. a wide diameter transmission member; 32. a narrow diameter transmission member;

4. a braking device; 41. a friction plate; 42. a brake pad; 43. a control mechanism; 431. an electromagnetic adsorption member; 432. a return spring;

5. a hub.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, for the utility model discloses an external rotor electric machine braking system, refer to fig. 1 and fig. 2, including external rotor electric machine 1, driven device 2 that are used for outwards exporting power, be used for giving driven device 2's drive mechanism 3 with external rotor electric machine 1's rotation transmission, and be used for braking driven device 2 with the arresting gear 4 of locking external rotor electric machine 1.

With continued reference to fig. 1, the transmission mechanism 3 includes a wide-diameter transmission member 31 fixed on the rotor of the outer rotor motor 1, and a narrow-diameter transmission member 32 interlocked with the wide-diameter transmission member 31 at the same linear velocity, the wide-diameter transmission member 31 is fixed on one side of the rotor of the outer rotor motor 1 close to the stator shaft by a bolt, in this embodiment, the wide-diameter transmission member 31 and the narrow-diameter transmission member 32 are both gear discs and are engaged with each other, and the diameter of the wide-diameter transmission member 31 is larger than that of the narrow-diameter transmission member 32.

The driven device 2 comprises a support frame 21 and a driven shaft 22 which is arranged on the support frame 21 in a penetrating way and is coaxially connected with the narrow-diameter transmission piece 32. The supporting frame 21 includes two fixing plates 211, a baffle 212 and a connecting plate 213, the two fixing plates 211 are located on the same side of the baffle 212 and are parallel to the baffle 212, the connecting plate 213 is disposed on one side of the two fixing plates 211 and the baffle 212 and is integrally connected to the baffle 212 and the end faces of the two fixing plates 211, in other words, the baffle 212, the connecting plate 213 and the two fixing plates 211 are integrally disposed in an "E" shape. The driven shaft 22 is a circular shaft, and is inserted through the two fixed plates 211 and connected to the fixed plates 211 through bearings. The narrow diameter transmission member 32 is located between the two fixed plates 211 and is keyed to the driven shaft 22.

The braking device 4 is a power-off brake which is connected with the supporting frame 21 and the driven shaft 22. When the power-off brake is in power-off state, the friction plate 41 on the power-off brake generates damping on the rotation to lock the driven shaft 22, and the rotation of the rotor of the outer rotor motor 1 is further locked through the action of the transmission mechanism 3.

Second preferred embodiment:

the point of difference from the first preferred embodiment is that, referring to fig. 2, the brake device 4 includes a friction plate 41 and a brake plate 42, and a control mechanism 43 for controlling the brake plate 42 to abut against or move away from the friction plate 41. The friction plate 41 and the brake plate 42 are both positioned between the middle fixing plate 211 and the baffle plate 212 of the support frame 21, and the friction plate 41 is closer to the baffle plate 212 than the brake plate 42. The friction plate 41 is a disc with a friction material on the surface, the driven shaft 22 is disposed on the axis of the friction plate 41 and drives the friction plate 41 to rotate synchronously, and in this embodiment, the friction plate 41 is connected with the driven shaft 22 through a key. The brake pad 42 is a circular plate adapted to the diameter of the friction plate 41, and an armature (not shown) is provided inside the disc, so that the brake pad 42 has ferromagnetism as a whole. The driven shaft 22 is also inserted through the axis of the brake block 42, the brake block 42 moves in the axial direction of the driven shaft 22, and the driven shaft 22 is fixed to the fixing plate 211 in the circumferential direction, that is, the brake block 42 does not rotate along with the driven shaft 22, which can be realized by providing a guide post (not shown in the figure) penetrating through the brake block 42 on the fixing plate 211, but any other way can be adopted to ensure that the positions of the fixing plate 211 and the brake block 42 in the circumferential direction of the driven shaft 22 are relatively fixed.

The control mechanism 43 includes an electromagnetic attraction piece 431 provided on the support frame 21 on the side of the brake plate 42 away from the friction plate 41, and a return spring 432 connecting the brake plate 42 and the support frame 21, and in the present embodiment, the electromagnetic attraction piece 431 is composed of an excitation coil and a magnetic yoke (not shown in the figure) and is provided on the fixed plate 211 in the middle of the support frame 21. In the energized state of the electromagnetic attraction piece 431, the brake pad 42 is attracted to the electromagnetic attraction piece 431, that is, the brake pad 42 is away from the friction plate 41 at this time, the rotation of the friction plate 41 and the driven shaft 22 is not hindered, and the outer rotor motor 1 operates normally. In the power-off state of the electromagnetic adsorption member 431, the return spring 432 is used for abutting the brake disc 42 against the friction disc 41, at this time, the friction disc 41 damps the rotation of the brake disc 42 to lock the brake disc 42 and the driven shaft 22, and further lock the rotation of the rotor of the outer rotor motor 1 through the action of the transmission mechanism 3.

Third preferred embodiment:

the difference from the first preferred embodiment is that, referring to fig. 3, the wide diameter transmission member 31 and the narrow diameter transmission member 32 are both disks and are driven by a belt.

Fourth preferred embodiment:

the difference from the first preferred embodiment is that the wide-diameter transmission 31 and the narrow-diameter transmission 32 are driven by a chain.

Fifth preferred embodiment:

referring to fig. 4, in order to the utility model discloses a low-speed movement device, including wheel hub 5 and any one of the above-mentioned four kinds of preferred embodiments external rotor electric machine braking system, external rotor electric machine 1 installs in wheel hub 5.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The outer rotor motor brake system is characterized by comprising an outer rotor motor (1), a transmission mechanism (3), a driven device (2) and a brake device (4), wherein the transmission mechanism (3) comprises a wide-diameter transmission part (31) fixed on a rotor of the outer rotor motor (1) and a narrow-diameter transmission part (32) which is linked with the wide-diameter transmission part (31) at the same linear velocity, the driven device (2) comprises a support frame (21) and a driven shaft (22) which penetrates through the support frame (21) and is coaxially connected with the narrow-diameter transmission part (32), and the brake device (4) is arranged on the support frame (21) and is used for controlling the driven shaft (22) to be locked or released on the support frame (21).

2. The external rotor electric machine brake system of claim 1, wherein the brake device (4) is a power-off brake connecting the support frame (21) and the driven shaft (22).

3. The external rotor motor brake system according to claim 1, wherein the brake device (4) comprises a friction plate (41) fixed on the driven shaft (22) and rotating synchronously with the driven shaft (22), a brake plate (42) sleeved on the driven shaft (22) and moving in the axial direction of the driven shaft (22), and a control mechanism (43) for controlling the brake plate (42) to abut against or be away from the friction plate (41) to lock or release the external rotor motor (1).

4. The external rotor motor brake system according to claim 3, wherein the control mechanism (43) comprises an electromagnetic adsorption member (431) arranged on the support frame (21) on the side of the brake pad (42) far away from the friction plate (41), and a return spring (432) connecting the brake pad (42) and the support frame (21), the brake pad (42) has ferromagnetism, the return spring (432) is used for abutting the brake pad (42) on the friction plate (41), and the electromagnetic adsorption member (431) is electrified to control the brake pad (42) to be separated from the friction plate (41).

5. The external rotor electric machine brake system according to claim 1, wherein the wide-diameter transmission member (31) and the narrow-diameter transmission member (32) are gear discs and are meshed with each other.

6. The external rotor electric machine brake system according to claim 1, wherein the wide diameter transmission member (31) and the narrow diameter transmission member (32) are both wheel discs and are driven by a belt.

7. The external rotor electric machine brake system according to claim 1, wherein the wide-diameter transmission member (31) and the narrow-diameter transmission member (32) are both gear discs and are driven by a chain.

8. The external rotor motor brake system according to claim 4, wherein the support frame (21) comprises two fixing plates (211), a baffle (212) and a connecting plate (213), the two fixing plates (211) are both located on the same side of the baffle (212) and are both arranged in parallel with the baffle (212), the connecting plate (213) is arranged on one side of the two fixing plates (211) and the baffle (212), and the connecting plate (213) is integrally connected to the baffle (212) and the end faces of the two fixing plates (211); the driven shaft (22) is a circular shaft, penetrates through the two fixing plates (211) and is connected with the fixing plates (211) through bearings; the narrow-diameter transmission piece (32) is positioned between the two fixing plates (211) and is in key connection with the driven shaft (22), the friction plate (41) and the brake plate (42) are both positioned between the middle fixing plate (211) and the baffle plate (212) of the support frame (21), and the friction plate (41) is close to the baffle plate (212) compared with the brake plate (42); the electromagnetic adsorption piece (431) is arranged on the fixing plate (211) in the middle of the support frame (21).

9. A low-speed movement device, characterized by comprising a wheel hub (5) and an outer rotor motor (1) braking system according to any one of claims 1-8, wherein the outer rotor motor (1) is installed in the wheel hub (5).