Direct drive motor parking mechanism and direct drive motor

Abstract

The application relates to the technical field of motors, in particular to a direct-drive motor parking mechanism and a direct-drive motor, which comprises a base, a rotating assembly rotatably connected to the base, and a brake assembly installed on the base and used for braking the rotating assembly; the brake assembly comprises a bottom plate installed on the base, an upper cover connected to the bottom plate, and a connecting seat arranged between the bottom plate and the upper cover; a sliding groove is arranged on the connecting seat; a magnet and a steel ball are slidably installed in the sliding groove; a coil is arranged outside the sliding groove; a steel sheet is arranged at one end of the sliding groove, and a locking opening is arranged at the other end of the sliding groove; the rotating assembly is provided with a locking groove facing the locking opening; when locking, the coil is electrified to generate an electromagnetic field opposite to the magnetic field of the magnet, so that the steel ball overcomes the magnetic attraction of the magnet and enters the locking groove along the sliding groove to realize the braking of the rotating assembly. The application adopts the sliding of the sliding groove matched with the magnet, and the magnet slides to push the steel ball to fall into the locking groove to brake the rotating assembly.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and in particular to a direct-drive motor parking mechanism and a direct-drive motor. Background Technology

[0002] Direct-drive motors have a wide range of applications, serving as drive wheels for robots and electric vehicles, and also as joint actuators for robots. Currently, direct-drive motors are stopped using brakes; however, this is only suitable for the drive wheels of electric vehicles and requires a relatively complex manual braking system, thus limiting its widespread use. In the robotics field, this stopping method is difficult to apply, especially since direct-drive motors are widely used in robotics and require stopping in many situations, such as stopping on inclines or during motion freezes. Currently, stopping is achieved using reverse current braking of the motor, which consumes significant power and lacks stability, affecting robot braking and freeze-stopping. Summary of the Invention

[0003] To solve the above problems, the present invention provides a direct drive motor parking mechanism and a direct drive motor that uses a sliding groove in conjunction with a magnet. When the magnet slides, it pushes a ball into a locking groove to brake the rotating component. This solves the problem of poor braking performance and ineffective braking of existing direct drive motors.

[0004] The technical solution adopted in this invention is: a direct-drive motor parking mechanism, including a base, a rotating component rotatably connected to the base, and a braking component mounted on the base for braking the rotating component; the braking component includes a chassis mounted on the base, a top cover connected to the chassis, and a connecting seat between the chassis and the top cover, the connecting seat having a sliding groove, a magnet and a steel ball being slidably mounted in the sliding groove, a coil being provided on the outer side of the sliding groove, a steel plate being provided at one end of the sliding groove, and a locking opening being provided at the other end, the rotating component having a locking groove facing the locking opening, when locking, the coil is energized to generate an electromagnetic field with a magnetic field opposite to that of the magnet, causing the steel ball to overcome the magnetic attraction of the magnet and enter the locking groove along the sliding groove to achieve braking of the rotating component.

[0005] A further improvement to the above solution is that the base has a locking cavity, the chassis is installed at one end of the locking cavity, the locking cavity includes an upper cavity and a lower cavity, the upper cavity and the lower cavity are interconnected, and the braking assembly is installed between the upper cavity and the lower cavity.

[0006] A further improvement to the above solution is that the rotating assembly includes a rotating shaft and a rotor housing fixedly connected to the rotating shaft. The rotating shaft is provided with a first bearing and a second bearing. The first bearing is installed in the upper cavity, and the second bearing is installed in the lower cavity. The rotating shaft is rotatably connected to the first bearing and the second bearing.

[0007] A further improvement to the above scheme is that the locking groove is formed on the rotating shaft.

[0008] A further improvement to the above scheme is that the depth of the locking groove is greater than the radius of the steel ball.

[0009] A further improvement to the above solution is that the connecting seat includes a trapezoidal column connected to the chassis and a connecting cover connected to the upper cover. The connecting cover is used to cover the outside of the trapezoidal column, and the sliding groove is formed between the trapezoidal column and the connecting cover.

[0010] A further improvement to the above scheme is that the number of steel balls is two.

[0011] A further improvement to the above scheme is that a demagnetizing component is provided between the steel sheet and the magnet, and the demagnetizing component is used to separate the steel sheet and the magnet.

[0012] A further improvement to the above scheme is that the magnet is a permanent magnet rod.

[0013] A further improvement to the above scheme is that the sum of the lengths of the magnet and the steel ball is less than the length of the chute.

[0014] A direct-drive motor, including the aforementioned direct-drive motor parking mechanism.

[0015] The beneficial effects of this invention are:

[0016] Compared to existing direct-drive motor parking systems, this invention provides a braking parking solution for direct-drive motors. It utilizes a sliding groove in conjunction with a sliding magnet. As the magnet slides, it pushes a ball into a locking groove to brake the rotating component, thus solving the problem of poor braking performance and ineffective braking in existing direct-drive motors. Specifically, it includes a base, a rotating component rotatably connected to the base, and a braking component mounted on the base for braking the rotating component. The braking component includes a chassis mounted on the base, a top cover connected to the chassis, and a connecting seat between the chassis and the top cover. The connecting seat has a sliding groove in which a magnet and a steel ball are slidably mounted. A coil is located on the outer side of the sliding groove. One end of the sliding groove has a steel plate, and the other end has a locking opening. The rotating component has a locking groove facing the locking opening. When locking, the coil is energized to generate an electromagnetic field opposite to the magnetic field of the magnet, causing the steel ball to overcome the magnetic attraction of the magnet and enter the locking groove along the sliding groove, thus braking the rotating component. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the direct drive motor parking mechanism of the present invention; Figure 2 for Figure 1 Top view of the parking mechanism of the direct drive motor; Figure 3for Figure 2 Sectional view of AA; Figure 4 for Figure 1 An exploded schematic diagram of the braking components of the parking mechanism of the direct drive motor; Figure 5 for Figure 1 Top view of the braking assembly of the parking mechanism of the direct drive motor; Figure 6 for Figure 5 Sectional view of AA.

[0018] Explanation of reference numerals in the attached drawings: base 1, locking cavity 11, upper cavity 111, lower cavity 112, rotating assembly 2, rotating shaft 21, locking groove 211, rotor housing 22, first bearing 23, second bearing 24, braking assembly 3, chassis 31, upper cover 32, connecting seat 33, trapezoidal column 331, connecting cover 332, sliding groove 34, coil 341, steel sheet 342, demagnetizing component 342a, locking port 343, magnet 35, steel ball 36. Detailed Implementation

[0019] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0020] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0022] like Figures 1-6As shown, in one embodiment of the present invention, a direct-drive motor parking mechanism includes a base 1, a rotating assembly 2 rotatably connected to the base 1, and a braking assembly 3 mounted on the base 1 for braking the rotating assembly 2. The braking assembly 3 includes a chassis 31 mounted on the base 1, an upper cover 32 connected to the chassis 31, and a connecting seat 33 disposed between the chassis 31 and the upper cover 32. The connecting seat 33 is provided with a sliding groove 34, in which a magnet 35 and a steel ball 36 are slidably mounted. A coil 341 is provided on the outside of the sliding groove 34. A steel sheet 342 is provided at one end of the sliding groove 34, and a locking opening 343 is provided at the other end. The rotating assembly 2 is provided with a locking groove 211 facing the locking opening 343. When locking, the coil 341 is energized to generate an electromagnetic field with a magnetic field opposite to that of the magnet 35, so that the steel ball 36 overcomes the magnetic attraction of the magnet 35 and enters the locking groove 211 along the sliding groove 34 to achieve braking of the rotating assembly 2.

[0023] The base 1 has a locking cavity 11, and the chassis 31 is installed at one end of the locking cavity 11. The locking cavity 11 includes an upper cavity 111 and a lower cavity 112, which are interconnected. The braking assembly 3 is installed between the upper cavity 111 and the lower cavity 112. In a further improvement of this embodiment, the rotating assembly 2 includes a rotating shaft 21 and a rotor housing 22 fixedly connected to the rotating shaft 21. The rotating shaft 21 is provided with a first bearing 23 and a second bearing 24. The first bearing 23 is installed in the upper cavity 111, and the second bearing 24 is installed in the lower cavity 112. The rotating shaft 21 is rotatably connected to the first bearing 23 and the second bearing 24. The structural design of the upper cavity 111 and the lower cavity 112 facilitates the installation of the two bearings with the rotating shaft 21. During rotation, it can stably drive the rotor housing 22 to rotate, which is suitable for external rotor motors.

[0024] The locking groove 211 is formed on the rotating shaft 21. During braking, the locking groove 211 is formed on the rotating shaft 21, thereby enabling the steel ball 36 to brake the rotating shaft 21 and achieve braking of the rotor housing 22. In different embodiments, the locking groove 211 can be formed on the rotor housing 22, which can also achieve braking.

[0025] The depth of the locking groove 211 is greater than the radius of the steel ball 36, which ensures that the steel ball 36 can be effectively braked between the slide groove 34 and the locking groove 211 without causing damage to the structure.

[0026] The connecting seat 33 includes a trapezoidal column 331 connected to the chassis 31 and a connecting cover 332 connected to the upper cover 32. The connecting cover 332 is used to cover the outside of the trapezoidal column 331. The sliding groove 34 is formed between the trapezoidal column 331 and the connecting cover 332. By using the trapezoidal column 331 and the connecting cover 332 to form the connecting seat 33, the structure is easy to assemble and the sliding groove 34 is also easy to process.

[0027] There are two steel balls 36. Due to process issues, after the steel ball 36 enters the locking groove 211, the magnet 35 and the steel ball 36 may not touch, resulting in insufficient attraction. When the rotor is braked, the steel ball 36 will be obstructed by lateral pressure, so even after the electromagnetic field disappears, the steel ball 36 still cannot be successfully attracted by the magnet 35, thus reducing the attraction of the magnet 35 to the steel ball 36.

[0028] A demagnetizing element 342a is provided between the steel sheet 342 and the magnet 35. The demagnetizing element 342a is used to separate the steel sheet 342 and the magnet 35. By separating the magnet 35 and the steel sheet 342 through the demagnetizing element 342a, they do not come into direct contact, thereby reducing the magnetic attraction between the steel sheet 342 and the magnet 35.

[0029] Magnet 35 is a permanent magnet rod. Using a permanent magnet rod as magnet 35 for magnetic attraction provides stable magnetic attraction and good durability.

[0030] The sum of the lengths of the magnet 35 and the steel ball 36 is less than the length of the groove 34, specifically less than 3 mm, so that there is a gap between the magnet 35 and the groove 34.

[0031] A direct-drive motor employs the aforementioned parking mechanism, which can stably lock the rotor during use and is suitable for robot parking and hub motor parking applications.

[0032] This invention is used for braking and parking a direct drive motor. It uses a sliding groove 34 in conjunction with the sliding of a magnet 35. When the magnet 35 slides, it pushes a ball into the locking groove 211 to brake the rotating component 2, thus solving the problem of poor braking performance and ineffective braking of existing direct drive motors. Specifically, a base 1, a rotating component 2 rotatably connected to the base 1, and a braking component 3 mounted on the base 1 for braking the rotating component 2 are provided. The braking component 3 includes a chassis 31 mounted on the base 1, an upper cover 32 connected to the chassis 31, and a connecting seat 33 located between the chassis 31 and the upper cover 32. The connecting seat 33 is provided with a sliding groove 34, in which a magnet 35 and a steel ball 36 are slidably mounted. A coil 341 is provided on the outside of the sliding groove 34. A steel sheet 342 is provided at one end of the sliding groove 34, and a locking opening 343 is provided at the other end. The rotating component 2 is provided with a locking groove 211 facing the locking opening 343. When locking, the coil 341 is energized to generate an electromagnetic field with a magnetic field opposite to that of the magnet 35, so that the steel ball 36 overcomes the magnetic attraction of the magnet 35 and enters the locking groove 211 along the sliding groove 34 to brake the rotating component 2.

[0033] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A direct-drive motor parking mechanism, characterized in that: The device includes a base, a rotating assembly rotatably connected to the base, and a braking assembly mounted on the base for braking the rotating assembly. The braking assembly includes a chassis mounted on the base, a top cover connected to the chassis, and a connecting seat between the chassis and the top cover. The connecting seat has a groove in which a magnet and a steel ball are slidably mounted. A coil is provided on the outside of the groove. A steel plate is provided at one end of the groove, and a locking opening is provided at the other end. The rotating assembly has a locking groove facing the locking opening. When locked, the coil is energized to generate an electromagnetic field with a magnetic field opposite to that of the magnet, causing the steel ball to overcome the magnetic attraction of the magnet and enter the locking groove along the groove to brake the rotating assembly.

2. The direct-drive motor parking mechanism according to claim 1, characterized in that: The base has a locking cavity, and the chassis is installed at one end of the locking cavity. The locking cavity includes an upper cavity and a lower cavity, which are connected to each other. The braking assembly is installed between the upper cavity and the lower cavity.

3. The direct-drive motor parking mechanism according to claim 2, characterized in that: The rotating assembly includes a rotating shaft and a rotor housing fixedly connected to the rotating shaft. The rotating shaft is provided with a first bearing and a second bearing. The first bearing is installed in the upper cavity, and the second bearing is installed in the lower cavity. The rotating shaft is rotatably connected to the first bearing and the second bearing.

4. The direct-drive motor parking mechanism according to claim 1, characterized in that: The locking groove is located on the rotating shaft.

5. The direct-drive motor parking mechanism according to claim 1, characterized in that: The depth of the locking groove is greater than the radius of the steel ball.

6. The direct-drive motor parking mechanism according to claim 1, characterized in that: The connecting seat includes a trapezoidal column connected to the chassis and a connecting cover connected to the top cover. The connecting cover is used to cover the outside of the trapezoidal column, and the sliding groove is formed between the trapezoidal column and the connecting cover.

7. The direct-drive motor parking mechanism according to claim 1, characterized in that: The number of steel balls is two.

8. The direct-drive motor parking mechanism according to claim 1, characterized in that: A demagnetizing component is provided between the steel sheet and the magnet, which is used to separate the steel sheet from the magnet.

9. The direct-drive motor parking mechanism according to claim 1, characterized in that: The sum of the lengths of the magnet and the steel ball is less than the length of the chute.

10. A direct-drive motor, characterized in that: Includes the direct drive motor parking mechanism as described in any one of claims 1 to 9.

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