WO2022134256A1

WO2022134256A1 - Braking device for electric motor driving shaft

Info

Publication number: WO2022134256A1
Application number: PCT/CN2021/073263
Authority: WO
Inventors: 杨茗晰
Original assignee: 杨茗晰
Priority date: 2020-12-24
Filing date: 2021-01-22
Publication date: 2022-06-30
Also published as: CN112696440B; CN112696440A

Abstract

A braking device for an electric motor driving shaft, the braking device comprising a front shell (1), wherein a rotating rod (2) is rotatably connected to the interior of the front shell (1), a connecting assembly (3) is movably arranged at one end of the rotating rod (2), and a driving assembly (4) is fixedly arranged at one end of the connecting assembly (3). The connecting assembly (3) comprises a driving head (301), wherein the driving head (301) is movably connected to one end of the rotating rod (2), a driving arm (302) is hinged to a surface of the end of the driving head (301) away from the rotating rod (2), and a rotating cover (303) is movably connected to a surface of the driving arm (302). The device is powered off by means of a first electromagnet (402); under the compression effect of a first damping spring (405), a first permanent magnet (403) cooperates with a driving ring (406) and a movement channel (407) by means of a first movable rod (404) to drive the driving arm (302) to be hinged to the driving head (301), and the driving arm (302) is separated from an inner wall of a driving recess (304); and at this moment, a driving relationship between the rotating rod (2) and the rotating cover (303) is stopped, and therefore, the rotating rod (2) can naturally stop after rotating under inertia for a certain time, thereby preventing a load from forming on the rotating rod (2) due to the braking of an output shaft (305) and accordingly eliminating the influence on the service life of the device.

Description

A braking device for a motor drive shaft

technical field

The invention relates to the technical field of electric motors, in particular to a braking device for a drive shaft of an electric motor.

Background technique

A motor is a device that converts electrical energy into mechanical energy, converting electrical energy into mechanical energy. It mainly includes an electromagnet winding or distributed stator winding for generating a magnetic field and a rotating armature or rotor. The energized coil is used to generate a rotating magnetic field and act on the rotor to form a magneto-electric rotational torque. According to the different power sources used, it is divided into DC motors and AC motors. Most of the motors in the power system are AC motors, which can be synchronous motors or asynchronous motors. The motor is mainly composed of a stator and a rotor. It is related to the direction of the current and the direction of the magnetic field lines. The working principle is that the force of the magnetic field on the current causes the motor to rotate.

However, in the actual use of the existing technology, when most motors are braked, the rotor still rotates with inertia for a certain period of time to stop naturally. In this way, the direct braking of the drive shaft will cause a large load on the rotor. Thus affecting the service life of the motor.

technical solutions

The purpose of the present invention is to provide a braking device for a motor drive shaft to solve the above-mentioned problems in the background art.

In order to achieve the above purpose, the present invention provides the following technical solutions: including a front shell, a rotating rod is rotatably connected to the inside of the front shell, one end of the rotating rod is movably provided with a connecting component, and one end of the connecting component is fixedly provided with a drive The connecting assembly includes a driving head, the driving head is movably connected to one end of the rotating rod, a driving arm is hinged on the surface of one end of the driving head away from the rotating rod, and a rotating cover is movably connected to the surface of the driving arm, The rotating cover is rotatably connected to the inner wall of the front case through a bearing, a drive slot is opened at one end of the rotating cover corresponding to the position of the drive arm, the inner wall of the drive slot is movably connected to the surface of the drive arm, and the rotating cover is away from the rotating rod One end of the position is fixedly connected with an output shaft, and the output shaft is rotatably connected to the middle of the front housing through a bearing, the drive assembly includes a first limit sleeve, and one end of the inner wall of the first limit sleeve is fixedly connected with a first electromagnet , the inner wall of the first limiting sleeve is movably connected with a first permanent magnet, the end of the first permanent magnet away from the position of the first electromagnet is fixedly connected with a first movable rod, and the first movable rod movably penetrates and extends to One end of the first limit sleeve, the end of the first permanent magnet corresponding to the position of the first movable rod is fixedly connected with a first damping spring, and the first damping spring is movably wound on the surface of the first movable rod, and the braking The disk is fixedly connected to the inner wall of the first limit sleeve, the end of the first movable rod away from the first permanent magnet position is fixedly connected with a driving ring, and the middle part of the driving arm corresponding to the position of the driving ring is provided with a movable groove, and is movable The inner wall of the groove is movably connected to the surface of the drive ring.

Preferably, a groove is formed on the inner wall of the rotating cover corresponding to the position of the driving arm, and one end of the groove away from the position of the driving groove is a flared structure, and the output shaft movably penetrates and extends to one end of the front housing.

Preferably, a first partition plate and a second partition plate are respectively fixedly connected to the inner wall of the front casing, the rear casing is fixedly connected to the end of the front casing away from the position of the output shaft, and the first partition plate and the second partition plate are fixedly connected. and the rear shell are arranged sequentially from right to left, the first limiting sleeve is fixedly connected to one end of the first partition plate corresponding to the position of the drive head, and the drive head is rotatably connected to one end of the first partition plate through a bearing.

Preferably, a stator is fixedly connected to the inner wall of the front housing, a coil is wound on the surface of the stator, a rotor is rotatably connected to the inner wall of the stator, and the rotor is fixedly connected to the surface of the rotating rod, and the stator is located in the first space Between the plate and the second partition, a through hole is opened in the middle of the first partition, the second partition and the rear shell corresponding to the position of the rotating rod, and the inner wall of the through hole is rotatably connected with a second ball. The surface of the second ball is movably connected with the surface of the rotating rod.

Preferably, a braking assembly is fixedly arranged on the inner wall of the front casing corresponding to the position of the output shaft, the braking assembly includes a second limiting sleeve, and the second limiting sleeve is fixedly connected to the inner wall of the front casing, and the A second electromagnet is fixedly connected to the inner wall of one end of the second limiting sleeve close to the front shell, and a second permanent magnet is movably connected to the inner wall of the second limiting sleeve, and the second permanent magnet is far from the second electromagnet. One end is fixedly connected with a second movable rod, and the second movable rod movably penetrates and extends to one end of the second limiting sleeve away from the inner wall of the front shell.

Preferably, a brake disc is fixedly connected to one end of the second movable rod corresponding to the position of the rotating cover, the opposite end of the brake disc and the opposite surface of the rotating cover are both rough set, and the brake disc corresponds to the second limit position One end of the sleeve position is fixedly connected with a second damping spring, and the second damping spring is fixedly connected to one end of the second limiting sleeve.

Preferably, a buffer assembly is fixed on the surface of the rotating rod, and the buffer assembly is located between the second partition plate and the rear shell, and the buffer assembly includes a fixed disk, and the fixed disk is fixedly connected to the surface of the rotating rod, so A double-ended telescopic rod is inserted through the middle of the fixed plate away from the position of the rotating rod, two ends of the double-ended telescopic rod are respectively fixedly connected with extrusion rings, and the ends of the two extrusion rings facing away from the surface are respectively connected in rotation with A plurality of first balls, the surfaces of the first balls are respectively rotatably connected with the surfaces of the rear shell and the second partition plate, and a third damping spring is fixedly connected to one end of the two extrusion rings corresponding to the position of the fixed plate.

Preferably, one end of the rotating rod corresponding to the position of the driving head is fixedly connected with a plurality of insertion rods, the middle part of the driving head corresponding to the position of the insertion rod is provided with an insertion hole, and the inner wall of the insertion hole is movably inserted into the surface of the insertion rod catch.

beneficial effect

Compared with the prior art, the beneficial effects of the present invention are:

1. In the present invention, the first electromagnet is powered off and the first permanent magnet is driven by the first movable rod to cooperate with the driving ring and the movable groove to drive the driving arm to be hinged with the driving head under the action of the contraction of the first damping spring, and make the driving arm disengage. Drive the inner wall of the groove, at this time, the driving relationship between the rotating rod and the rotating cover is disconnected, so that the rotating rod can inertial rotate for a certain period of time and then stop naturally, preventing the brake output shaft from causing load on the rotating rod and affecting the service life of the device ;

2. At the same time, when the device is powered off and braked, the second electromagnet no longer attracts the second permanent magnet, so that the second permanent magnet, the second movable rod and the brake disc are reset on the second damping spring. Under the action of stretching, it approaches one end of the rotating cover until the brake disc and the rotating cover are in close contact. act as a brake;

3. In the present invention, a buffer assembly is also provided, so that when the rotating rod rotates and moves under the mutual cooperation of the stator, the coil and the rotor, the rotating rod drives the fixed plate to move left and right, and the fixed plate is driven by the third damping spring. The extrusion ring moves to the surface of the rear shell or the second partition, and by setting the first ball, when the extrusion ring moves to the surface of the rear shell or the second partition, it will not cause unnecessary rotation of the rotating rod Through the third damping spring, the movement of the fixed plate can be buffered, so that the movement of the rotating rod can be buffered. The movement plays a guiding role, so that the extrusion ring drives the first ball to evenly fit the surface of the rear shell or the second partition. The movement prevents the movement of the rotating rod from being transmitted to the output shaft through the drive head, the drive arm and the rotating cover.

Description of drawings

1 is a front sectional view of the overall structure of a braking device for a motor drive shaft of the present invention;

Figure 2 is a front cross-sectional view of the structure of a buffer assembly of a braking device for a motor drive shaft of the present invention;

3 is a front cross-sectional view of the structure of a brake device connecting assembly of a motor drive shaft of the present invention;

4 is a front cross-sectional view of the structure of a braking assembly of a braking device for a motor drive shaft of the present invention;

Fig. 5 is an enlarged view of the structure at A in Fig. 4 of a braking device for a motor drive shaft of the present invention;

6 is a top sectional view of the structure of a brake device connection assembly of a motor drive shaft of the present invention;

FIG. 7 is an enlarged view of the structure at B in FIG. 6 of a braking device for a motor drive shaft of the present invention;

8 is a side sectional view of the structure of a drive head of a braking device for a motor drive shaft of the present invention.

In the figure: 1. Front shell; 2. Rotating rod; 3. Connecting assembly; 301, Driving head; 302, Driving arm; 303, Rotating cover; 304, Driving slot; 305, Output shaft; 4. Driving assembly; 401, 402, the first electromagnet; 403, the first permanent magnet; 404, the first movable rod; 405, the first damping spring; 406, the drive ring; 407, the movable groove; 5, the brake assembly; 501, the second limit sleeve; 502, the second electromagnet; 503, the second permanent magnet; 504, the second movable rod; 505, the brake disc; 506, the second damping spring; 6, the first partition plate; 7 9, the second partition; 8, the rear shell; 9, the buffer assembly; 901, the fixed plate; 902, the double-ended telescopic rod; 903, the squeeze ring; rod; 907, jack; 10, stator; 11, coil; 12, rotor; 13, second ball.

Embodiments of the present invention

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

1-8, the present invention provides a technical solution: comprising a front shell 1, a rotating rod 2 is rotatably connected inside the front shell 1, one end of the rotating rod 2 is movably provided with a connecting component 3, and one end of the connecting component 3 is fixed A drive assembly 4 is provided, the connection assembly 3 includes a drive head 301, the drive head 301 is movably connected to one end of the rotating rod 2, and a drive arm 302 is hinged on the surface of one end of the drive head 301 away from the position of the rotating rod 2, and the surface of the drive arm 302 is movably connected There is a rotating cover 303, the rotating cover 303 is rotatably connected to the inner wall of the front housing 1 through a bearing, and one end of the rotating cover 303 corresponding to the position of the driving arm 302 is provided with a driving slot 304. An output shaft 305 is fixedly installed at one end of the cover 303 away from the position of the rotating rod 2, and the output shaft 305 is rotatably connected to the middle of the front housing 1 through a bearing. The drive assembly 4 includes a first limit sleeve 401. A first electromagnet 402 is fixedly installed at one end, a first permanent magnet 403 is movably connected to the inner wall of the first limiting sleeve 401, and a first movable rod 404 is fixedly installed at one end of the first permanent magnet 403 away from the position of the first electromagnet 402. And the first movable rod 404 moves through and extends to one end of the first limiting sleeve 401 , and one end of the first permanent magnet 403 corresponding to the position of the first movable rod 404 is fixedly installed with a first damping spring 405 , and the first damping spring 405 The first movable rod 404 is movably wound on the surface of the first movable rod 404, the brake disc 505 is fixedly installed on the inner wall of the first limit sleeve 401, and the end of the first movable rod 404 away from the first permanent magnet 403 is fixedly installed with a drive ring 406. The drive arm A movable groove 407 is defined in the middle of the position corresponding to the driving ring 406 of 302 , and the inner wall of the movable groove 407 is movably connected with the surface of the driving ring 406 .

The inner wall of the rotating cover 303 corresponding to the position of the driving arm 302 is provided with a groove, and the end of the groove away from the position of the driving groove 304 is a flared structure. The inner wall of 303 corresponding to the position of the driving arm 302 is provided with a groove, so that the driving arm 302 can be guided, and it is convenient for the driving arm 302 to enter the inside of the driving groove 304 .

The inner wall of the front shell 1 is respectively fixed with a first partition plate 6 and a second partition plate 7, the end of the front shell 1 away from the output shaft 305 is fixedly installed with a rear shell 8, the first partition plate 6, the second partition plate 7 and the rear shell 8 are fixedly installed. The rear shells 8 are arranged sequentially from right to left. The first limiting sleeve 401 is fixedly installed at one end of the first partition 6 corresponding to the position of the driving head 301 , and the driving head 301 is rotatably connected to one end of the first partition 6 through a bearing.

A stator 10 is fixedly installed on the inner wall of the front housing 1, a coil 11 is wound on the surface of the stator 10, a rotor 12 is rotatably connected to the inner wall of the stator 10, and the rotor 12 is fixedly installed on the surface of the rotating rod 2, and the stator 10 is located on the first partition 6 Between them and the second partition 7, the first partition 6, the second partition 7 and the rear shell 8 are provided with through holes in the middle corresponding to the position of the rotating rod 2, and the inner walls of the through holes are rotatably connected with the second balls 13 , the surface of the second ball 13 is movably connected with the surface of the rotating rod 2, and the second ball 13 can be set by rotating the first partition 6, the second partition 7 and the rear shell 8 corresponding to the position of the rotating rod 2, so that the Affect the rotation and movement of the rotating rod 2.

The inner wall of the front shell 1 corresponding to the position of the output shaft 305 is fixedly provided with a braking assembly 5 . The braking assembly 5 includes a second limiting sleeve 501 , and the second limiting sleeve 501 is fixedly installed on the inner wall of the front shell 1 . A second electromagnet 502 is fixedly installed on the inner wall of one end of the sleeve 501 close to the position of the front shell 1, and the inner wall of the second limiting sleeve 501 is movably connected with a second permanent magnet 503, and the end of the second permanent magnet 503 away from the position of the second electromagnet 502 A second movable rod 504 is fixedly installed, and the second movable rod 504 runs through and extends to the end of the second limiting sleeve 501 away from the inner wall of the front shell 1. When the device is powered off and braked, the second electromagnetic The iron 502 no longer attracts the second permanent magnet 503, so that the second permanent magnet 503, the second movable rod 504 and the brake disc 505 approach the end of the rotating cover 303 under the action of the reset and tension of the second damping spring 506 until the stop is reached. The moving disc 505 is closely attached to the rotating cover 303, and the opposite ends of the braking disc 505 and the rotating cover 303 are rough arranged, so that the output shaft 305 can be braked by the braking disc 505 and the rotating cover 303.

A brake disc 505 is fixedly installed at one end of the second movable rod 504 corresponding to the position of the rotating cover 303 , and the opposite end of the braking disc 505 and the rotating cover 303 is rough set, and the brake disc 505 corresponds to the position of the second limiting sleeve 501 One end of the second damping spring 506 is fixedly installed, and the second damping spring 506 is fixedly installed at one end of the second limiting sleeve 501 .

A buffer assembly 9 is fixed on the surface of the rotating rod 2, and the buffer assembly 9 is located between the second partition 7 and the rear shell 8. The buffer assembly 9 includes a fixed disk 901, which is fixedly installed on the surface of the rotating rod 2, and is fixed A double-ended telescopic rod 902 is inserted through the middle of the disk 901 away from the rotating rod 2. The two ends of the double-ended telescopic rod 902 are respectively fixed with extrusion rings 903, and the ends of the two extrusion rings 903 facing away from the surface are respectively connected with A plurality of first balls 904, the surfaces of the first balls 904 are rotatably connected to the surfaces of the rear shell 8 and the second partition 7 respectively, and a third damper is fixedly installed at one end of the two squeeze rings 903 corresponding to the position of the fixed plate 901 Spring 905.

One end of the rotating rod 2 corresponding to the position of the driving head 301 is fixedly installed with a plurality of insertion rods 906, and a hole 907 is opened in the middle of the driving head 301 corresponding to the position of the insertion rod 906, and the inner wall of the insertion hole 907 is movable with the surface of the insertion rod 906 By plugging, by setting the buffer assembly 9, when the rotating rod 2 rotates and moves under the mutual cooperation of the stator 10, the coil 11 and the rotor 12, the rotating rod 2 drives the fixed disk 901 to move left and right, and makes the fixed disk 901 pass through. The third damping spring 905 drives the pressing ring 903 to move toward the surface of the rear shell 8 or the second partition 7 , and by setting the first balls 904 , when the pressing ring 903 moves to the surface of the rear housing 8 or the second partition 7 , It will not cause unnecessary power consumption to the rotation of the rotating rod 2, and the movement of the fixed plate 901 can be buffered by the third damping spring 905, so that the movement of the rotating rod 2 can be buffered. and by setting the double-ended telescopic rod 902, it can guide the movement of the first ball 904, so that the pressing ring 903 drives the first ball 904 and the surface of the rear shell 8 or the second partition 7 to be uniform Fitting, by setting the insertion rod 906 and the socket 907, the rotating rod 2 can move laterally without affecting the transmission, preventing the movement of the rotating rod 2 from being transmitted to the output through the driving head 301, the driving arm 302 and the rotating cover 303 at axis 305.

Working principle: When in use, when the invention is in use through the device, the first electromagnet 402 is energized to drive the first permanent magnet 403 to move to the end away from the position of the first electromagnet 402, and make the first permanent magnet 403 pass through the first permanent magnet 403. The movable rod 404 drives the drive ring 406 to move toward the end away from the rotating cover 303 and stretches the first damping spring 405 , and when the drive ring 406 moves toward the end away from the rotating cover 303 , the drive ring 406 drives the drive arm through the movable slot 407 302 is hinged with the drive head 301, and makes the end of the drive arm 302 away from the drive head 301 move to the inside of the drive slot 304, at this time the rotating rod 2 rotates under the mutual cooperation of the stator 10, the coil 11 and the rotor 12, and makes the rotating rod 2. The driving head 301 cooperates with the driving arm 302 and the driving slot 304 to drive the rotating cover 303 to rotate, so that the rotating cover 303 drives the output shaft 305 to rotate to complete the driving operation. When the device is de-energized and braked, the first electromagnet 402 is de-energized and The first permanent magnet 403 is moved to the end away from the position of the first electromagnet 402 under the action of the contraction of the first damping spring 405, and the first movable rod 404 cooperates with the driving ring 406 and the movable groove 407 to drive the driving arm 302 and the driving head 301. Hinged, and make the driving arm 302 move to the inside of the rotating cover 303 and disengage from the inner wall of the driving slot 304, at this time, the driving relationship between the rotating rod 2 and the rotating cover 303 is disconnected, so that the rotating rod 2 can inertial rotate after a certain period of time Stop naturally to avoid the load on the rotating rod 2 caused by the brake output shaft 305 and thus affect the service life of the device.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims

A braking device for a motor drive shaft, comprising a front casing (1), characterized in that a rotating rod (2) is rotatably connected inside the front casing (1), and one end of the rotating rod (2) is movably arranged There is a connecting assembly (3), one end of the connecting assembly (3) is fixedly provided with a driving assembly (4), the connecting assembly (3) includes a driving head (301), and the driving head (301) is movably connected to rotate One end of the rod (2), a driving arm (302) is hinged on the surface of one end of the driving head (301) away from the position of the rotating rod (2), and a rotating cover (303) is movably connected to the surface of the driving arm (302), The rotating cover (303) is rotatably connected to the inner wall of the front casing (1) through a bearing, and a driving slot (304) is provided at one end of the rotating cover (303) corresponding to the position of the driving arm (302). 304) The inner wall is movably connected with the surface of the drive arm (302), the end of the rotating cover (303) away from the position of the rotating rod (2) is fixedly connected with an output shaft (305), and the output shaft (305) is rotatably connected to the shaft through a bearing. In the middle of the front shell (1), the drive assembly (4) includes a first limit sleeve (401), and one end of the inner wall of the first limit sleeve (401) is fixedly connected with a first electromagnet (402), so A first permanent magnet (403) is movably connected to the inner wall of the first limiting sleeve (401), and a first movable rod (403) is fixedly connected to one end of the first permanent magnet (403) away from the position of the first electromagnet (402). 404), and the first movable rod (404) runs through and extends to one end of the first limiting sleeve (401), and the end of the first permanent magnet (403) corresponding to the position of the first movable rod (404) is fixedly connected There is a first damping spring (405), and the first damping spring (405) is movably wound on the surface of the first movable rod (404), and the brake disc (505) is fixedly connected to the first limit sleeve (401). In the inner wall, a drive ring (406) is fixedly connected to one end of the first movable rod (404) away from the position of the first permanent magnet (403), and a drive ring (406) is opened in the middle of the drive arm (302) corresponding to the position of the drive ring (406). A movable groove (407), and the inner wall of the movable groove (407) is movably connected with the surface of the driving ring (406).
A braking device for a motor drive shaft according to claim 1, characterized in that: the inner wall of the rotating cover (303) corresponding to the position of the driving arm (302) is provided with a groove, and the groove is far away from the driving groove ( One end at the position 304) is a flared structure, and the output shaft (305) movably penetrates and extends to one end of the front housing (1).
A braking device for a motor drive shaft according to claim 1, characterized in that: a first partition plate (6) and a second partition plate (7) are fixedly connected to the inner wall of the front casing (1), respectively, The end of the front casing (1) away from the output shaft (305) is fixedly connected with the rear casing (8), the first partition (6), the second partition (7) and the rear casing (8) from the right Set in order to the left, the first limiting sleeve (401) is fixedly connected to one end of the first partition plate (6) corresponding to the position of the driving head (301), and the driving head (301) is rotatably connected to the first spacer (301) through a bearing. One end of the separator (6).
A braking device for a motor drive shaft according to claim 3, characterized in that: a stator (10) is fixedly connected to the inner wall of the front casing (1), and a coil (10) is wound on the surface of the stator (10). 11), a rotor (12) is rotatably connected to the inner wall of the stator (10), and the rotor (12) is fixedly connected to the surface of the rotating rod (2), and the stator (10) is located at the first partition plate (6) and Between the second partitions (7), the first partitions (6), the second partitions (7) and the rear shell (8) are all provided with through holes in the middle parts corresponding to the positions of the rotating rods (2), and The inner wall of the through hole is rotatably connected with a second ball (13), and the surface of the second ball (13) is movably connected with the surface of the rotating rod (2).
A braking device for a motor drive shaft according to claim 1, characterized in that: a braking assembly (5) is fixedly arranged on the inner wall of the front casing (1) corresponding to the position of the output shaft (305), and the The brake assembly (5) includes a second limit sleeve (501), the second limit sleeve (501) is fixedly connected to the inner wall of the front shell (1), and the second limit sleeve (501) is close to the front shell (1) A second electromagnet (502) is fixedly connected to the inner wall of one end of the position, and a second permanent magnet (503) is movably connected to the inner wall of the second limiting sleeve (501). The second permanent magnet (503) A second movable rod (504) is fixedly connected to one end away from the position of the second electromagnet (502), and the second movable rod (504) movably penetrates and extends to the second limiting sleeve (501) away from the inner wall of the front shell (1) one end of the location.
A braking device for a motor drive shaft according to claim 5, characterized in that: one end of the second movable rod (504) corresponding to the position of the rotating cover (303) is fixedly connected with a brake disc (505), One end of the brake disc (505) and the opposite surface of the rotating cover (303) are rough set, and one end of the brake disc (505) corresponding to the position of the second limit sleeve (501) is fixedly connected with a second damping spring (506), and the second damping spring (506) is fixedly connected to one end of the second limiting sleeve (501).
A braking device for a motor drive shaft according to claim 3, characterized in that a buffer assembly (9) is fixed on the surface of the rotating rod (2), and the buffer assembly (9) is located on the second partition plate Between (7) and the rear shell (8), the buffer assembly (9) includes a fixed plate (901), the fixed plate (901) is fixedly connected to the surface of the rotating rod (2), the fixed plate (901) ) away from the rotating rod (2), a double-ended telescopic rod (902) is inserted through the middle, and the two ends of the double-ended telescopic rod (902) are fixedly connected with extruding rings (903) respectively. The ends of the ring (903) facing away from the surface are respectively connected with a plurality of first balls (904) in rotation, and the surfaces of the first balls (904) rotate with the surfaces of the rear shell (8) and the second partition plate (7) respectively. connected, and a third damping spring (905) is fixedly connected to one end of the two extruding rings (903) corresponding to the position of the fixing plate (901).
A braking device for a motor drive shaft according to claim 7, characterized in that: one end of the rotating rod (2) corresponding to the position of the driving head (301) is fixedly connected with a plurality of insertion rods (906), so An insertion hole (907) is provided in the middle of the driving head (301) corresponding to the position of the insertion rod (906), and the inner wall of the insertion hole (907) is movably plugged with the surface of the insertion rod (906).