CN220980171U - Motor assembly - Google Patents

Abstract

The application provides an electromagnetic braking motor assembly, which comprises a motor body, wherein the motor body is provided with an output shaft, and the motor assembly further comprises: a brake for braking an output shaft of the motor body, wherein the brake includes: the brake wheel is connected with the output shaft to rotate together with the output shaft; the two braking parts are respectively arranged at the two radial sides of the braking wheel; and the driving part is connected with the motor body and is used for driving the two braking parts to move towards the direction approaching to the radial end surface of the braking wheel so as to be abutted with the radial end surface of the braking wheel to brake the braking wheel or move towards the direction far away from the radial end surface of the braking wheel so as to release the braking of the braking wheel. According to the motor assembly provided by the application, as the two braking parts respectively brake the braking wheel in a manner of abutting against the radial end face of the braking wheel, even if the radial end face of the braking wheel is worn, the braking effect of the brake on the motor output shaft is not obviously affected.

Description

Motor assembly

Technical Field

The utility model relates to the technical field of motors, in particular to a motor assembly.

Background

In the related art, a motor brakes a motor rotating shaft by using a disc brake. The disc brake consists of two parts, namely a brake friction disc and a brake main body, wherein the brake friction disc is connected with a rotating shaft of a motor through keys, and the axial direction of the brake friction disc is fixed by a spring retainer ring. The brake main body and the motor special end cover are fixed by a brake fixing bolt.

Since the disc brake achieves a braking effect by friction between the brake main body and the axial end face of the brake friction disc, the braking effect will be deteriorated when abrasion occurs to the axial end face of the brake friction disc.

Disclosure of Invention

In order to solve, or at least solve, part of the above problems, the present application provides an electromagnetically braked motor assembly. The motor assembly includes a motor body having an output shaft, the motor assembly further including: a brake for braking an output shaft of the motor body, wherein the brake includes: the brake wheel is connected with the output shaft to rotate together with the output shaft; the two braking parts are respectively arranged at the two radial sides of the braking wheel; and the driving part is connected with the motor body and is used for driving the two braking parts to move towards the direction approaching to the radial end surface of the braking wheel so as to be abutted with the radial end surface of the braking wheel to brake the braking wheel or move towards the direction far away from the radial end surface of the braking wheel so as to release the braking of the braking wheel.

Further, the driving section includes: the electromagnetic coil is configured to enable the two driving shafts to be subjected to repulsive force to move oppositely when power is supplied; the two braking parts are respectively connected with the two driving shafts so that the two braking parts are driven by the two driving shafts to move in the direction away from the radial end face of the braking wheel under the repulsive force.

Further, the brake further includes: and each reset piece is arranged on one side of one brake piece and is used for providing restoring force for the brake piece when the brake piece moves in the direction away from the radial end face of the brake wheel so as to enable the brake piece to move in the direction approaching the radial end face of the brake wheel under the action of the restoring force when the electromagnetic coil is powered off.

Further, the motor body further comprises a motor end cover, and the output shaft penetrates through the motor end cover to extend towards the brake; the brake further includes: and the connecting piece is used for connecting the driving part to the motor end cover.

Further, the brake further includes: the two guide rods are respectively connected with the connecting piece, each braking piece is slidably arranged on the guide rod, and the resetting piece is a spring sleeved on the guide rod.

Further, an end of the braking member remote from the guide bar is connected to the motor end cap.

Further, the two braking members are symmetrically arranged relative to a bisecting plane of the braking wheel perpendicular to the guide rod.

Further, the brake further includes: a release lever connected to the driving part and configured to move the two brake members in a direction away from the brake wheel by operating the release lever when the electromagnetic coil is de-energized; the release lever is located at a side of the driving part away from the motor body.

According to the motor assembly provided by the application, as the two braking parts are respectively arranged at the two radial sides of the braking wheel, the braking wheel is braked in a manner of being abutted against the radial end surface of the braking wheel, and even if the radial end surface of the braking wheel is worn, the braking effect of the brake on the motor output shaft is not obviously affected.

Drawings

Other objects and advantages of the present utility model will become apparent from the following description of the utility model with reference to the accompanying drawings, which provide a thorough understanding of the present utility model.

FIG. 1 is a side view of a motor assembly according to one embodiment of the present utility model;

FIG. 2 is an exploded schematic view of the motor assembly of FIG. 1;

FIG. 3 is a front view of the motor assembly shown in FIG. 1;

Fig. 4 is a schematic view of a brake according to an embodiment of the present utility model.

It should be noted that the drawings are not necessarily to scale, but are merely shown in a schematic manner that does not affect the reader's understanding.

Reference numerals illustrate:

10. an output shaft; 11. a brake wheel; 12. opening holes; 13. a through hole; 14. a groove; 15. a connecting key;

20. A brake member; 21. a brake arm; 22. a brake block; 23. a braking surface; 24. a shaft; 25. a pin shaft;

30. An end cap;

40. A driving section; 41. a drive shaft; 42. a release lever;

50. A connecting piece; 51. a horizontal connecting plate; 52. a first vertical connection plate; 53. a second vertical connection plate;

60. a guide rod;

70. A reset member;

81. A shaft; 82. a lug; 83. a cotter pin;

100. A motor body.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. It will be apparent that the described embodiments are one embodiment, but not all embodiments, of the present utility model. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present utility model fall within the protection scope of the present utility model.

It is to be noted that unless otherwise defined, technical or scientific terms used herein should be taken in a general sense as understood by one of ordinary skill in the art to which the present utility model belongs.

In the description of the embodiments of the present utility model, the meaning of "plurality" is at least two, for example, two, three, etc., unless explicitly defined otherwise.

Referring to fig. 1 to 4, an embodiment of the present utility model provides a motor assembly including a motor body 100, the motor body 100 having an output shaft 10, the motor assembly further including a brake for braking the output shaft 10 of the motor body 100.

The brake may include a brake wheel 11, a brake member 20, and a driving part 40. The brake wheel 11 is connected to the output shaft 10 for rotation with the output shaft 10. The two brake members 20 are respectively provided on both radial sides of the brake wheel 11. The driving part 40 is connected to the motor body 100 for driving the two braking members 20 to move in a direction approaching the radial end surface of the braking wheel 11 to abut against the radial end surface of the braking wheel 11 to brake the braking wheel 11 or to move in a direction separating from the radial end surface of the braking wheel 11 to release the braking of the braking wheel 11.

In the embodiment of the application, when the brake piece 20 is utilized to brake the brake wheel 11, the brake piece 20 provides friction force to ensure that the brake wheel 11 drives the output shaft 10 to stop rotating; when the brake member 20 releases the brake, the brake member 20 does not contact the brake wheel 11, and the output shaft 10 drives the brake wheel 11 to rotate normally.

According to the motor assembly provided by the application, since the two braking pieces 20 are respectively arranged at the two radial sides of the braking wheel 11, the braking wheel 11 is braked by being abutted against the radial end surface of the braking wheel 11, and even if the radial end surface of the braking wheel 11 is worn, the braking effect of the brake on the motor output shaft 10 is not obviously affected.

The motor assembly provided by the application has the advantages that as the motor assembly is provided with the two braking pieces 20, the braking of the braking wheel 11 can be realized through the abutting of the other braking piece 20 with the radial end surface of the braking wheel 11 under the condition that one braking piece 20 fails, and the safety is higher.

The motor body 100 may be a low-speed permanent magnet synchronous motor, or may be another type of motor.

The disc brake of the related art is mounted at the non-shaft outlet end of the motor (i.e., at the end opposite to the output shaft of the motor), and the release bolt is located in the axial direction, resulting in limited installation space, and difficulty in maintaining and adjusting the brake working air gap. The embodiment of the present application makes the installation more convenient by installing the brake on the side of the motor body 100 facing the output shaft 10.

Referring to fig. 1, in some embodiments, a brake wheel 11 is mounted on a side of the motor body 100 facing the output shaft 10, and a through hole 13 is provided in the middle of the brake wheel 11. The output shaft 10 passes through the brake wheel 11 from the through hole 13 and is connected to the brake wheel 11. Specifically, a groove 14 may be provided on the through hole 13, a connection key 15 may be provided on the output shaft 10, and synchronous rotation of the brake wheel 11 and the output shaft 10 may be achieved through cooperation of the groove 14 and the connection key 15. The axial direction of the brake wheel 11 can be fixed by a spring retainer ring for the shaft.

The brake wheel 11 can be provided with a plurality of holes 12 so that the brake wheel 11 has a hollowed-out structure, thereby reducing the weight of the brake wheel 11 and further reducing the adverse effect on the output shaft 10 when the brake wheel 11 rotates.

In some embodiments, the driving part 40 may include: a solenoid and a drive shaft 41. The electromagnetic coil is configured to subject the two drive shafts 41 to repulsive force to move in opposition when power is supplied. The two braking members 20 are respectively connected with the two driving shafts 41 to drive the two braking members 20 to move away from the radial end surfaces of the braking wheels 11 by the repulsive force of the two driving shafts 41.

The driving part 40 may be a magnetic device. The drive shaft 41 may be made of an armature. The magnetometers may be commercially available products. The magnetic device includes a housing, an electromagnetic coil is provided inside the housing, and a driving shaft 41 is protruded outside the housing. Because solenoid sets up inside the shell, the protection level is high, long service life, safe and reliable. The magnetic device provided by the embodiment of the application has high wear resistance and good rust prevention function.

In some embodiments, the brake may further comprise: two return members 70, each return member 70 is disposed on one side of one of the brake members 20 for providing a restoring force to the brake member 20 when the brake member 20 moves in a direction away from the radial end face of the brake wheel 11, so that the brake member 20 moves in a direction approaching the radial end face of the brake wheel 11 under the restoring force when the electromagnetic coil is de-energized.

The return member 70 may be a resilient element, such as a spring. When the motor body is operated (i.e., when the output shaft 10 rotates), the driving portion 40 drives the brake member 20 to move in a direction away from the radial end surface of the brake wheel 11, and elastic potential energy can be stored. When the motor body stops operating (i.e., when the output shaft 10 stops rotating), the stored elastic potential energy moves the brake member 20 in a direction approaching the radial end surface of the brake wheel 11 in the form of a restoring force.

By providing the reset member 70, the embodiment of the application can ensure that the brake member 20 can approach the brake wheel 11 and brake the brake wheel 11 when the motor stops working.

In some embodiments, the motor body 100 further includes a motor end cap 30, the output shaft 10 extending through the motor end cap 30 toward the brake; the brake further includes: and a connector 50 for connecting the driving part 40 to the motor end cover 30.

Referring to fig. 2, in particular, the connection member 50 may include a horizontal connection plate 51 extending in a horizontal direction and a first vertical connection plate 52 extending in a vertical direction. An end of the horizontal connection plate 51 facing the motor end cap 30 is connected to an upper end of the first vertical connection plate 52.

The first vertical connection plate 52 may be connected to the motor end cap 30 by a fastener, and the driving part 40 may be connected to the horizontal connection plate 51 above the horizontal connection plate 51 by a fastener. The fastener may be, for example, a bolt screw or the like.

In some embodiments, the brake further comprises: the two guide rods 60 are respectively connected with the connecting piece 50, each braking piece 20 is slidably arranged on the guide rod 60, and the resetting piece 70 is a spring sleeved on the guide rod 60.

In some embodiments, two guide rods 60 may be mounted to the motor end cap 30 by a connector 50. Specifically, the connector 50 further includes two second vertical connection plates 53 extending in the vertical direction. The two second vertical connection plates 53 are perpendicular to the first vertical connection plate 52 and connected to both ends of the first vertical connection plate 52, respectively, and the upper ends of the two second vertical connection plates 53 are connected to the horizontal connection plate 51. Two guide bars 60 may be connected to one second vertical connection plate 53, respectively.

In some embodiments, the guide bar 60 may be configured to include a thick bar and a thin bar that are coupled together. The thin bars of the two guide bars 60 face each other and the thick bars face away from each other. The thin rod is fixedly connected with the second vertical connecting plate 53.

The braking member 20 is provided with a through hole, the braking member 20 is slidably disposed on the thin rod through the through hole, and the resetting member 70 is sleeved on the thick rod. The side of the through hole facing the thin rod is a thin hole. The side of the through hole facing the thick rod is a thick hole, and a part of the reset element 70 is positioned in the thick hole. When the brake is operated, the brake member 20 slides on the thin rod, the position of which is limited by the thicker rod and which is not excessively far from the brake wheel 11.

In some embodiments, the thin rod may be a screw, which is locked by a nut after being connected to the second vertical connection plate 53.

The embodiment of the application enables the brake member 20 to move in a preset direction without shifting in the moving direction when approaching or separating from the brake wheel 11 by providing the guide bar 60.

In some embodiments, the brake 20 includes a brake arm 21 and a brake pad 22 coupled to the brake arm 21. Wherein the upper end of the brake arm 21 is slidably disposed on the guide bar 60. The braking surface 23 of the brake shoe 22 facing the radial end face of the brake wheel 11 is rubber for abutment with the radial end face of the brake wheel 11.

The upper end of the brake arm 21 is slidably disposed on the guide rod 60, and the driving shaft 41 may drive the upper end of the brake arm 21 to approach or separate from the brake wheel 11 in the direction of the guide rod 60 when the brake is operated or stopped.

When the brake block 22 is worn, only the brake block 22 can be replaced without replacing the brake arm 21, which is convenient.

In some embodiments, the brake pad 22 is rotatably connected to the brake arm 21 about an axis 24 parallel to the output shaft 10. By providing the brake arm 21 and the brake shoe 22 rotatably connected, the brake shoe 22 can be made to adaptively adjust the fit with the radial end face of the brake wheel 11, achieving a better braking effect.

It will be readily appreciated that the brake shoe 22 is rotatable only to a small extent so as not to allow the brake shoe 22 to rotate too far, resulting in contact with the radial end face of the brake wheel 11 in the non-braked condition. In some embodiments, the lower portion of the brake pad 22 may be rotationally restrained using a pin 25 mounted to the brake arm 21. Specifically, a mounting hole is formed in the lower portion of the brake arm 21, and a pin 25 extends from the outside to the inside through the mounting hole toward the brake shoe 22.

The brake pad 22 may be made of cast steel in portions other than the braking surface 23. The shaft 24 may be a pin.

In some embodiments, the lower end of the brake arm 21 is rotatably connected to the motor end cap 30 about an axis 81 parallel to the output shaft 10.

When the upper end of the brake arm 21 moves toward or away from the brake wheel 11 in the direction of the guide bar 60 by the driving of the driving shaft 41, the lower end of the brake arm 21 rotates about the shaft 81.

The lower end of the brake arm 21 is provided with a shaft hole, the shaft 81 can be a pin, the motor end cover 30 is provided with a lug 82 with a hole, the tail end of the lug 82 is provided with an opening, the pin sequentially passes through the shaft hole at the lower end of the brake arm 21 and the hole of the lug 82, and then the pin is inserted into the opening at the tail end of the pin by using an opening pin 83, so that the connection between the brake arm 21 and the motor end cover 30 is realized.

In some embodiments, the two brake members 20 are symmetrically disposed with respect to a bisecting plane of the brake wheel 11 perpendicular to the guide bar 60, thereby enhancing the braking effect.

When the electromagnetic coil in the magnetic device is electrified, the driving shaft 41 of the magnetic device moves to two sides, so that the brake arms 21 also move to two sides at the same time, the brake block 22 and the brake wheel 11 are separated from each other, the springs at two ends are in a compressed state, at the moment, the brake is in a released state, and the engine body 100 normally operates.

When the electromagnetic coil in the magnetic device is powered off, the driving shaft 41 of the magnetic device is retracted to an original state, springs at two ends are released, the brake arms 21 are pushed to the middle, the brake blocks 22 are tightly contacted with the brake wheel 11, a braking effect is achieved by utilizing friction force, and the engine body 100 is immediately stopped in a braking state.

In some embodiments, the brake further comprises: the release lever 42 is connected to the driving unit 40, and is configured to move the two brake members 20 in a direction away from the brake wheel 11 by operating the release lever 42 when the electromagnetic coil is de-energized. The release lever is located on the side of the drive section 40 remote from the motor body. By providing the release lever 42, the brake member 20 can be manually moved in a direction away from the brake wheel 11 when the solenoid is de-energized, thereby canceling braking of the brake wheel 11. Specifically, when the solenoid is de-energized, the release lever 42 can be manually depressed downward, with the brake arm 21 moving to both sides. The release lever 42 may also be released to move the two brake arms 21 in a direction approaching the brake wheel 11. The release lever 42 is provided on the side of the driving part 40 away from the motor body 100, and the release lever 42 can be operated on the side of the driving part 40 away from the motor body 100, which is convenient to operate.

The release lever 42 may be located at an upper portion of the driving part to save space. When the drive is a commercially available magnetic device, the magnetic device may be provided with a release lever 42.

It should also be noted that, in the embodiments of the present utility model, the features of the embodiments of the present utility model and the features of the embodiments of the present utility model may be combined with each other to obtain new embodiments without conflict.

The present utility model is not limited to the above embodiments, but the scope of the utility model is defined by the claims.

Claims (8)

1. A motor assembly comprising a motor body having an output shaft, the motor assembly further comprising: a brake for braking an output shaft of the motor body, wherein the brake includes:

The brake wheel is connected with the output shaft to rotate together with the output shaft;

The two braking parts are respectively arranged at two radial sides of the braking wheel; and

And the driving part is connected with the motor body and is used for driving the two braking parts to move towards the direction approaching to the radial end surface of the braking wheel so as to be abutted with the radial end surface of the braking wheel to brake the braking wheel or move towards the direction far away from the radial end surface of the braking wheel so as to release the braking of the braking wheel.

2. The motor assembly of claim 1, wherein the drive portion comprises:

A solenoid and two drive shafts, the solenoid configured to be energized to subject the two drive shafts to a repulsive force to move in opposition;

The two braking parts are respectively connected with the two driving shafts, so that the two driving shafts drive the two braking parts to move in a direction away from the radial end face of the braking wheel under the repulsive force.

3. The motor assembly of claim 2, wherein the brake further comprises:

And each reset piece is arranged on one side of one braking piece and is used for providing restoring force for the braking piece when the braking piece moves in a direction away from the radial end face of the braking wheel so as to enable the braking piece to move in a direction approaching to the radial end face of the braking wheel under the action of the restoring force when the electromagnetic coil is powered off.

4. The motor assembly of claim 3, wherein the motor body further comprises a motor end cap through which the output shaft extends toward the brake;

The brake further includes: and the connecting piece is used for connecting the driving part to the motor end cover.

5. The motor assembly of claim 4, wherein the brake further comprises:

the two guide rods are respectively connected with the connecting piece, each braking piece is slidably arranged on the guide rod, and the resetting piece is a spring sleeved on the guide rod.

6. The motor assembly of claim 5, wherein an end of the brake remote from the guide rod is connected to the motor end cap.

7. The motor assembly of claim 5, wherein two of the braking members are symmetrically disposed with respect to a bisecting plane of the braking wheel perpendicular to the guide bar.

8. The motor assembly of claim 2, wherein the brake further comprises:

A release lever connected to the driving part and configured to move the two brake members in a direction away from the brake wheel by operating the release lever when the electromagnetic coil is de-energized;

The release lever is located at a side of the driving part remote from the motor body.