Brake assembly and electric push rod

Abstract

The utility model relates to electric push rod technical field, concretely relates to a brake assembly and electric push rod, the brake assembly, including first connecting piece, second connecting piece and brake piece, the first connecting piece is used for with the output end connection of motor, the second connecting piece is used for with the input end connection of outside load, the first connecting piece, second connecting piece and brake piece are configured as: when the first connecting piece direct current, the first connecting piece drives second connecting piece and brake piece to rotate simultaneously, when the first connecting piece stops or reverses, second connecting piece continues direct current under the action of inertia and collides with the first connecting piece after a distance and is forced to stop by the brake piece to the buffer of second connecting piece and the second connecting piece.

Description

Technical Field

[0001] This utility model relates to the field of electric actuator technology, specifically to a brake assembly and an electric actuator. Background Technology

[0002] Electric motors, especially DC motors or servo motors used in electric linear actuators, are widely used in automated equipment to provide precise linear or rotary motion. However, a common technical problem is inertial slip or overshoot. When a motor drives a load with significant inertia (such as the lead screw and push rod arm of an electric linear actuator, or the weight it drives), even if the motor power is cut off, its output end (i.e., the electric linear actuator) does not stop immediately due to the inertia of the load, but continues to slip a certain distance before stopping.

[0003] This inertial slippage leads to serious positioning inaccuracies, which is unacceptable in situations requiring precise positioning, such as automated production lines, medical beds, and smart homes (e.g., motorized curtains or height-adjustable tables).

[0004] Existing solutions include using electromagnetic brakes or worm gear drives with high self-locking properties. However, electromagnetic brakes increase system complexity and cost and require additional control circuitry; while worm gear drives, although self-locking, may not be able to completely eliminate all inertial slippage in certain high-speed response applications due to insufficient reverse self-locking response.

[0005] Therefore, how to provide a mechanical braking component that is simple in structure, responds quickly, is inexpensive, and can effectively eliminate inertial slippage is a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a braking component and electric push rod that can utilize the inertia of the load itself to achieve fast and precise braking through buffering and resistance, so as to eliminate inertial slippage during motor braking.

[0007] The beneficial effects of this utility model are: A braking assembly includes a first connector, a second connector, and a brake component. The first connector is used to connect to the output terminal of a motor, and the second connector is used to connect to the input terminal of an external load. The first connector, the second connector, and the brake are configured as follows: When the first connecting piece rotates forward, it simultaneously drives the second connecting piece and the brake piece to rotate. When the first connecting member stops or reverses, the second connecting member continues to rotate forward for a distance under the action of inertia and comes into contact with the first connecting member. Then, the braking component buffers the second connecting member and forces it to stop.

[0008] The first connector includes a first main body for connecting to the output end of the motor, a first driving part and a second driving part respectively located on one side of the edge of the first main body and spaced apart, and the second connector includes a second main body for connecting to the input end of an external load and a first abutting part located on one side of the edge of the second main body. The first contact portion is located between the first driving portion and the second driving portion to contact the first driving portion and the second driving portion respectively.

[0009] The brake component is a torsion spring structure, with one end of the brake component pressing against the side of the first driving part away from the first contact part, and the other end of the brake component pressing against the side of the second driving part away from the first contact part.

[0010] The first connector further includes a third driving part, and the second body further includes a second abutting part and a third abutting part. The first driving part, the second driving part and the third driving part are all spaced apart, and the first abutting part, the second abutting part and the third abutting part are all spaced apart. The first driving part, the second driving part, the third driving part, the first contact part, the second contact part, and the third contact part are arranged alternately.

[0011] The brake assembly further includes a housing with mounting holes, and the brake component, the first connector, and the second connector are rotatably accommodated within the mounting holes.

[0012] This utility model also discloses an electric push rod, the output end of which is provided with a braking component as described in any of the preceding claims.

[0013] The beneficial effects of this utility model are: This utility model discloses a braking assembly and an electric actuator. By providing a first connector, a second connector, and a braking component, the braking component is triggered by the inertia of the load itself to buffer and rebound, thereby achieving fast, smooth, and precise braking of the motor output and solving the problem of inertial slippage of the electric actuator. Attached Figure Description

[0014] The present invention will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present invention. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0016] Figure 2 This is an exploded view of the present invention.

[0017] Figure Labels First connector -- 100, first main body -- 101, first drive unit -- 102, second drive unit -- 103, third drive unit -- 104 Second connector - 200, first contact part - 201, second contact part - 202, third contact part - 203, second main body - 204 Brake component--300, housing--301, mounting hole--302. Detailed Implementation

[0018] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0021] like Figure 1 and Figure 2As shown, this embodiment discloses a braking assembly, including a first connector 100, a second connector 200, and a braking component 300. The first connector 100 is used to connect to the output end of a motor, and the second connector 200 is used to connect to the input end of an external load. The first connector 100, the second connector 200, and the brake component 300 are configured as follows: When the first connecting member 100 rotates forward, the first connecting member 100 simultaneously drives the second connecting member 200 and the brake member 300 to rotate. When the first connecting member 100 stops or reverses, the second connecting member 200 continues to rotate forward for a distance under the action of inertia and comes into contact with the first connecting member 100. Then, the brake member 300 buffers the second connecting member 200 and forces the second connecting member 200 to stop.

[0022] The core of this invention is to utilize the inertia of the load to trigger braking. The motor is rigidly connected to the first connecting member 100 and rotates synchronously; the load is connected to the second connecting member 200 in the same way.

[0023] In the startup state, the first connector 100 and the second connector 200 rotate together. When the motor stops, the first connector 100 stops immediately, while the second connector 200 attempts to continue rotating due to inertia. The overshoot of the second connector 200 creates a small relative angle between it and the first connector 100 until they collide. The brake 300 is positioned on this collision path, and all the inertial energy of the second connector 200 is used to compress the brake 300. The brake 300 absorbs this kinetic energy and then immediately releases the reaction force, thereby quickly bringing the second connector 200 to a stop.

[0024] This completely solves the problem of the load end continuing to slide due to inertia after the motor stops, greatly improving the system's positioning accuracy. The braking process is a buffered stop, rather than a rigid impact. This avoids the transmission chain (such as gears) from being subjected to huge impact loads due to sudden stopping, protecting the mechanical structure, reducing noise, and eliminating the need for complex electromagnetic control, resulting in low cost and high reliability.

[0025] As a preferred embodiment, the first connector 100 includes a first body 101 for connecting to the output end of a motor, a first drive portion 102 and a second drive portion 103 respectively located on one side of the edge of the first body 101 and spaced apart. The second connector 200 includes a second body 204 for connecting to the input end of an external component to be driven, and a first abutment portion 201 located on one side of the edge of the second body 204; the first abutment portion 201 (a protrusion on the load side) is located between the first drive portion 102 and the second drive portion 103 (two protrusions on the motor side) to abut against the first drive portion 102 and the second drive portion 103 respectively.

[0026] In this embodiment, the first connector 100 has two stops (first and second driving parts 103) with a gap between them. The second connector 200 has a stop (first abutment part 201) that moves within this gap.

[0027] During forward rotation, the first drive unit 102 pushes the first abutment part 201, propelling the load forward. During braking, the first connector 100 stops, and both the first drive unit 102 and the second drive unit 103 stop. Due to inertial overshoot, the first abutment part 201 of the second connector 200 disengages from the first drive unit 102, passes through the gap, and impacts the second drive unit 103. The structure of this embodiment is very simple, intuitive, and reliable. The arc length of this gap (i.e., the free travel of the first abutment part 201) can be precisely designed to control the sensitivity of the braking response.

[0028] As a preferred embodiment, the brake element 300 is a torsion spring structure, with one end of the brake element 300 pressing against the side of the first drive part 102 away from the first contact part 201 (i.e., the outer side of the first drive part 102), and the other end of the brake element 300 pressing against the side of the second drive part 103 away from the first contact part 201 (i.e., the outer side of the second drive part 103).

[0029] In this embodiment, the torsion spring is pre-tensioned and supported on the outside of the two driving portions of the first connector 100. When the first abutment 201 impacts the second driving portion 103 due to inertia, it is actually pushing the second driving portion 103. When the second driving portion 103 is pushed, it forces the torsion spring to be further compressed. All the inertial kinetic energy of the second connector 200 is used to overcome the elastic force of the torsion spring and is converted into the elastic potential energy of the torsion spring. Once the kinetic energy is completely absorbed, the torsion spring will immediately release the potential energy, firmly pressing the first abutment 201 against the second driving portion 103, achieving a gapless and firm stop. In this embodiment, the elastic deformation of the torsion spring perfectly absorbs the impact energy, avoiding the noise and damage of rigid impact; the energy storage and release process of the spring is very rapid, ensuring that the load stops within a very short time and a very small sliding distance; the torsion spring can be cleverly integrated around the two connectors without occupying too much space.

[0030] As a preferred embodiment, the first connector 100 further includes a third driving part 104, and the second main body 204 further includes a second abutting part 202 and a third abutting part 203. The first driving part 102, the second driving part 103 and the third driving part 104 are all spaced apart, and the first abutting part 201, the second abutting part 202 and the third abutting part 203 are all spaced apart. The first driving unit 102, the second driving unit 103, the third driving unit 104, the first contact unit 201, the second contact unit 202, and the third contact unit 203 are arranged alternately.

[0031] This embodiment achieves an alternating arrangement of three contact parts and three drive parts, distributing the driving force and braking buffer force from one contact point to three contact points. Multi-point contact makes the transmission smoother and the force more even, avoiding the uneven load or abnormal wear that may be caused by single-point contact. At the same time, it significantly reduces the stress at a single contact point, making this brake assembly very suitable for heavy-duty applications with high power, high load, and frequent start-stop.

[0032] As a preferred embodiment, the brake assembly further includes a housing 301, which is provided with a mounting hole 302, and the brake component 300, the first connector 100 and the second connector 200 are rotatably accommodated in the mounting hole 302.

[0033] In this embodiment, the entire brake assembly is encapsulated in a housing 301, forming an independent, modular coupling. This coupling can serve as a standard module, easily installed between the motor and the load on the production line, and is also convenient for future maintenance and replacement. In addition, the housing 301 protects the internal components from the intrusion of contaminants such as dust and grease, ensuring long-term stability of braking performance. The mounting hole 302 also provides a precise coaxiality reference for the two connecting parts, ensuring smooth rotation and reliable engagement.

[0034] In addition, the present invention also provides an electric actuator, the output end of which is provided with a brake assembly as described in this embodiment.

[0035] In summary, the braking assembly and electric actuator provided in this embodiment, through ingenious mechanical structure design, utilize the inertia of the load itself to trigger the buffering and rebound of the torsion spring, achieving rapid, smooth, and precise braking of the motor output. This invention features a simple structure, low cost, and high reliability, perfectly solving the problem of inertial slippage in motors (especially electric actuators), and has extremely high application value in all automation fields requiring precise positioning.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A braking assembly, characterized in that, It includes a first connector, a second connector, and a brake component. The first connector is used to connect to the output end of the motor, and the second connector is used to connect to the input end of an external load. The first connector, the second connector, and the brake are configured as follows: When the first connecting piece rotates forward, it simultaneously drives the second connecting piece and the brake piece to rotate. When the first connecting member stops or reverses, the second connecting member continues to rotate forward for a distance under the action of inertia and comes into contact with the first connecting member. Then, the braking component buffers the second connecting member and forces it to stop.

2. A braking assembly according to claim 1, characterized in that, The first connector includes a first main body for connecting to the output end of the motor, a first driving part and a second driving part respectively located on one side of the edge of the first main body and spaced apart. The second connector includes a second main body for connecting to the input end of an external load and a first abutting part located on one side of the edge of the second main body. The first contact portion is located between the first driving portion and the second driving portion to contact the first driving portion and the second driving portion respectively.

3. A braking assembly according to claim 2, characterized in that, The brake component is a torsion spring structure. One end of the brake component presses against the side of the first driving part away from the first contact part, and the other end of the brake component presses against the side of the second driving part away from the first contact part.

4. A braking assembly according to claim 3, characterized in that, The first connector further includes a third driving part, and the second body further includes a second abutting part and a third abutting part. The first driving part, the second driving part and the third driving part are all spaced apart, and the first abutting part, the second abutting part and the third abutting part are all spaced apart. The first driving part, the second driving part, the third driving part, the first contact part, the second contact part, and the third contact part are arranged alternately.

5. A braking assembly according to claim 1, characterized in that, The brake assembly also includes a housing with mounting holes, and the brake component, the first connector, and the second connector are rotatably accommodated within the mounting holes.

6. An electric linear actuator, characterized in that, The output end of the electric actuator is provided with a braking assembly as described in any one of claims 1-5.

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