Brake assembly

Abstract

The utility model belongs to the technical field of electrically-driven actuators, and discloses a braking assembly, the braking assembly is used for braking an output shaft of a driver, the braking assembly comprises a braking piece and an elastic piece, the braking piece comprises a braking part and an abutting part, and the abutting part is arranged on the braking part; the elastic piece is propped against the propping part; and the elastic piece drives the braking part to compress and brake the driver output shaft. According to the utility model, the elastic piece is utilized to drive the brake piece to press the driver output shaft, so as to brake the driver output shaft.

Description

Technical Field

[0001] The utility model relates to the technical field of electric drive actuators, in particular to a brake assembly. Background Art

[0002] Electric drive actuators are widely used in the electric furniture industry, such as electric seats, electric sofas, electric beds, etc. Electric drive actuators are used as power parts to enable furniture products to switch to different postures to meet user needs. In order to brake the motor shaft of the electric drive actuator and keep the motor shaft in a specific posture, a braking device is usually configured to brake the motor shaft to prevent the motor shaft from reversing under the action of external loads.

[0003] The current braking device is usually composed of a braking element and an accumulator. The braking element, under the action of the accumulator, holds the motor shaft of the electric drive actuator tightly, and the motor shaft is braked by friction. However, the current braking device generally requires the accumulator to surround the entire outer circumference of the braking element, so that the braking element can be pressed against the motor shaft. The size of the accumulator is too large, the installation process of the accumulator is relatively complicated, and the matching accuracy between the braking element and the accumulator is high. Utility Model Content

[0004] The utility model aims to provide a brake assembly, which utilizes an elastic member to drive a brake member to press a driver output shaft, thereby braking the driver output shaft.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] A brake assembly, used for braking the output shaft of a drive, comprising:

[0007] A brake member, the brake member comprising a brake portion and an abutment portion, the abutment portion being disposed on the brake portion;

[0008] an elastic member abutting against the abutting portion;

[0009] Wherein, the elastic member drives the braking part to press and brake the driver output shaft.

[0010] As an optional technical solution, the brake assembly further includes a rotating portion, the rotating portion is arranged on the brake portion, and the brake member takes the rotating portion as a rotation center.

[0011] As an optional technical solution, the braking portion includes a braking arc surface extending along the circumference of the driver output shaft, a first end surface extending toward the rotating portion, and a second end surface extending toward the abutting portion.

[0012] As an optional technical solution, the corresponding angle of the braking arc surface is 90° to 270°.

[0013] As an alternative technical solution, an elastic strengthening portion is provided on the braking arc surface.

[0014] As an alternative technical solution, the abutting portion includes a first abutting portion and a second abutting portion, the elastic member includes a first elastic member and a second elastic member, the first elastic member abuts against the first abutting portion, the second elastic member abuts against the second abutting portion, a first extension surface of the first abutting portion extending away from the first elastic member is disposed at a first included angle with the second end surface, and a second extension surface of the second abutting portion extending away from the second elastic member is disposed at a second included angle with the second end surface.

[0015] As an alternative technical solution, the rotating portion is of a rotary body structure, and the braking member takes the rotation center line of the rotating portion as the rotation center line.

[0016] As an alternative technical solution, the rotation center line of the rotating portion and the second end surface are located on the same extended plane.

[0017] As an alternative technical solution, a groove is provided on the abutting portion, and at least a part of the elastic member is inserted into the groove.

[0018] As an alternative technical solution, the elastic member extends outward from the surface of the abutting portion.

[0019] Advantages of the present utility model:

[0020] The braking assembly provided by the present utility model is used for braking the output shaft of a driver. The braking assembly includes a braking member and an elastic member. The braking member includes a braking portion and an abutting portion, and the abutting portion is disposed on the braking portion; the elastic member abuts against the abutting portion. The elastic member uses its own elastic driving force to drive the braking portion to press against the output shaft of the driver, and the output shaft of the driver is under the pressure of the braking portion during the process of outputting power and when maintaining a specific posture. The present utility model simplifies the structure of the braking assembly, reduces the shape requirements and installation requirements for the braking member, the shape requirements and installation requirements for the elastic member, and the matching precision requirements for the braking member and the elastic member. Description of the drawings

[0021] Figure 1 is the first structural schematic diagram of the braking assembly of the present utility model;

[0022] Figure 2 is the second structural schematic diagram of the braking assembly of the present utility model;

[0023] Figure 3 is the third structural schematic diagram of the braking assembly of the present utility model;

[0024] Figure 4 is the fourth structural schematic diagram of the braking component of the present utility model;

[0025] Figure 5 is the fifth structural schematic diagram of the braking component of the present utility model;

[0026] Figure 6 is the sixth structural schematic diagram of the braking component of the present utility model;

[0027] Figure 7 is the seventh structural schematic diagram of the braking component of the present utility model;

[0028] Figure 8 is the eighth structural schematic diagram of the braking component of the present utility model;

[0029] Figure 9 is the exploded view of the driver of the present utility model.

[0030] In the figure:

[0031] 100, driver output shaft;

[0032] 1, braking member; 11, braking part; 111, braking arc surface; 112, first end face; 113, second end face; 114, elastic strengthening part; 12, rotating part; 13, abutting part; 13a, first abutting part; 13b, second abutting part;

[0033] 2, elastic member; 2a, first elastic member; 2b, second elastic member. Detailed implementation manners

[0034] The present utility model will be further described in detail below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the convenience of description, only parts related to the present utility model rather than all structures are shown in the drawings.

[0035] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0036] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "under" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is lower than that of the second feature.

[0037] In the description of this embodiment, the orientation or positional relationships such as "upper", "lower", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0038] In Figure 1 , the elastic member 2 is a spring; in Figure 2 , Figures 5 - 8 , the elastic member 2 and the braking member 1 are integrally formed, and the elastic member 2 is a Z-shaped continuous structure; in Figure 3 , the elastic member 2 and the braking member 1 are integrally formed, and the elastic member 3 is an O-shaped structure; in Figure 4 , the elastic member 2 and the braking member 1 are integrally formed, and the elastic member 3 is a structure with a concave waist.

[0039] As Figures 1 - 9 shown, this embodiment provides a braking assembly. The braking assembly is used to brake the output shaft 100 of the driver. The braking assembly includes a braking member 1 and an elastic member 2. The braking member 1 includes a braking portion 11 and an abutting portion 13. The abutting portion 13 is disposed on the braking portion 11; the elastic member 2 abuts against the abutting portion 13; wherein, the elastic member 2 drives the braking portion 11 to tightly press against the output shaft 100 of the driver.

[0040] This embodiment simplifies the structure of the braking assembly, reduces the shape requirements and installation requirements for the braking member 1, the shape requirements and installation requirements for the elastic member 2, and the matching precision requirements between the braking member 1 and the elastic member 2.

[0041] The braking assembly of this embodiment is disposed in the receiving groove of the housing of the driver. In this embodiment, the driver refers to a motor, and the furniture product refers to a smart bed. The output shaft 100 of the driver extends into the receiving groove. The first end of the elastic member 2 abuts against the inner wall of the receiving groove, and the second end abuts against the abutting portion 13, providing an elastic supporting force for the braking portion 11. Under the action of the elastic supporting force of the elastic member 2, the braking member 1 always applies pressure to the circumference of the output shaft 100 of the driver. When the driver controls the bed board of the smart bed to rise, the output shaft 100 of the driver rotates forward and transmits power to a transmission device such as a round aluminum tube. The transmission device elongates and drives the bed board of the smart bed to rise. At this time, due to the heavy weight of the bed board, a large reaction force will naturally be applied to the transmission device, forcing it to shorten. The transmission device will force the output shaft 100 of the driver to rotate in reverse. Since the braking portion 11 always applies pressure to the circumference of the output shaft 100 of the driver, the braking portion 11 can prevent the output shaft 100 of the driver from rotating in reverse, thereby enabling the transmission device to maintain its current length without shortening, and also enabling the bed board to maintain its current rising height and preventing the bed board from descending. When the driver controls the bed board of the smart bed to descend, the output shaft 100 of the driver rotates in reverse and transmits power to the transmission device. The transmission device shortens and drives the bed board of the smart bed to descend. At this time, due to the heavy weight of the bed board, a large reaction force will naturally be applied to the transmission device, forcing it to accelerate its own shortening process. Since the braking portion 11 always applies pressure to the circumference of the output shaft 100 of the driver, the braking portion 11 can prevent the output shaft 100 of the driver from suddenly accelerating and rotating in reverse at a certain moment, thereby preventing the descending speed of the bed board from suddenly becoming too fast or even getting out of control.

[0042] Optionally, the braking assembly further includes a rotating portion 12. The rotating portion 12 is disposed on the braking portion 11, and the braking member 1 rotates around the rotating portion 12 as the rotation center. In this embodiment, the braking member 1 is rotatably installed in the receiving groove on the housing of the driver. An installation groove is provided in the receiving groove, and the rotating portion 12 is rotatably installed in the installation groove to prevent the braking member 1 from getting stuck.

[0043] In some other embodiments, abutting portions 13 are respectively provided at both ends of the braking portion 11. Each abutting portion 13 is abutted by an elastic member 2, and the two elastic members 2 jointly apply a thrust force to the braking member 1, pressing the braking portion 11 radially against the output shaft 100 of the driver.

[0044] Optionally, the braking portion 11 includes a braking arc surface 111 extending around the output shaft 100 of the driver, a first end surface 112 extending toward the rotating portion 12, and a second end surface 113 extending toward the abutting portion 13. The area of the braking arc surface 111 is relatively large, which can ensure that the braking portion 11 is in surface contact with the output shaft 100 of the driver, improving the braking effect. The transition portions between the rotating portion 12 and the first end surface 112 and between the abutting portion 13 and the second end surface 113 are relatively thick, which can avoid breaking under large forces.

[0045] Optionally, the angle corresponding to the braking arc surface 111 is 90° to 270°. In this embodiment, the angle corresponding to the braking arc surface 111 is 180°, and the braking part 11 is a semi-circular arc structure. While ensuring the braking effect, it can also save materials and reduce costs. In some other cases, the angle corresponding to the braking arc surface 111 is 90°. At this time, more materials can be further saved, but the area of the braking arc surface 111 is reduced and the braking effect decreases. Or, the angle corresponding to the braking arc surface 111 is 270°. At this time, the material consumption increases, but the area of the braking part 11 increases and the braking effect improves.

[0046] Optionally, an elastic strengthening part 114 is arranged on the braking arc surface 111. The elastic strengthening part 114 abuts against the output shaft 100 of the driver. In this embodiment, the elastic strengthening part 114 is a notch on the braking arc surface 111, and the notch extends along the radial direction of the braking arc surface 111. Since the volume of the braking part 1 is small, after a notch is opened on the braking arc surface 111 of the braking part 11, when the output shaft 100 of the driver rotates, the braking arc surface 111 is more likely to elastically deform when abutting against the output shaft 100 of the driver, and the notch will deform to a certain extent when abutting against the output shaft 100 of the driver, and its contact area when abutting against the output shaft 100 of the driver will also increase compared with the contact area between the flat braking arc surface 111 and the output shaft 100 of the driver, and the braking effect is also better; a lubricating oil is applied to the surface of the braking arc surface 111. The lubricating oil has viscosity, and the thicker its oil film, the stronger the protection of the friction surface. When the braking arc surface 111 brakes the output shaft 100 of the driver, the lubricating oil can reduce the wear between the braking part 11 and the output shaft 100 of the driver. At the same time, the lubricating oil has a certain viscosity and can maintain the braking effect. The notch on the braking arc surface 111 can store more lubricating oil than the flat braking arc surface 111, and the service life of the braking assembly is prolonged.

[0047] In some other embodiments, the notch extends in a direction at a certain angle to the axial direction of the braking arc surface 111, or the notch extends in a shape such as "S", "W", "X", etc. on the braking arc surface 111.

[0048] In some other embodiments, the elastic strengthening part 114 can be a groove recessed inward on the surface of the braking arc surface 111, and the groove can be one or more.

[0049] Optionally, the abutment portion 13 includes a first abutment portion 13a and a second abutment portion 13b, the elastic member 2 includes a first elastic member 2a and a second elastic member 2b, the first elastic member 2a abuts against the first abutment portion 13a, the second elastic member 2b abuts against the second abutment portion 13b, a first extension surface of the first abutment portion 13a extending away from the first elastic member 2a is arranged at a first angle with the second end surface 113, and a second extension surface of the second abutment portion 13b extending away from the second elastic member 2b is arranged at a second angle with the second end surface 113.

[0050] In this embodiment, there is one abutting portion 13 , and the central axis of the rotating portion 12 , the arc center of the braking portion 11 , and the extending surface of the abutting portion 13 away from the elastic member 2 are all located on the same extending plane.

[0051] In some other embodiments, the abutting portions 13 are provided in two or more numbers, wherein the two abutting portions 13 are respectively the first abutting portion 13a and the second abutting portion 13b, and the elastic members 2 are provided in two or more numbers, wherein the two elastic members 2 are respectively the first elastic member 2a and the second elastic member 2b. By applying a greater thrust to the brake member 1 using a plurality of elastic members 2, the braking effect can be improved.

[0052] Optionally, the rotating part 12 is a rotating body structure, and the brake member 1 rotates with the rotation center line of the rotating part 12 as the rotation center line. In this embodiment, the rotating part 12 is a cylindrical structure, and in some other embodiments, the rotating part 12 is a spherical structure. The rotating part 12 is arranged in the installation groove, and the brake part 11 rotates with the rotation center line of the rotating part 12 as the rotation center line, and brakes with the driver output shaft 100.

[0053] Optionally, the rotation center line of the rotating portion 12 and the second end surface 113 are located on the same extension plane.

[0054] like Figure 1 As shown, optionally, a groove is provided on the abutting portion 13 , the elastic member 2 is a spring, and the elastic member 2 is at least partially inserted into the groove to prevent the elastic member 2 from being separated from the abutting portion 13 .

[0055] like Figures 2 - 8 As shown, optionally, the elastic member 2 extends outward from the surface of the abutment portion 13, and the elastic member 2 and the abutment portion 13 are integrally arranged and are both made of plastic material. The elastic member 2 abuts against the abutment portion 13, and the end of the elastic member 2 extending outward abuts against the inner wall of the accommodating groove to provide an elastic supporting force for the braking portion 11. Under the action of the elastic supporting force of the elastic member 2, the braking member 1 always applies pressure to the periphery of the drive output shaft 100.

[0056] like Figure 9As shown in the figure, the present embodiment also provides an electric drive actuator, which includes a driver, a housing, a transmission device, and the braking component as described above. The transmission device is arranged inside the housing. The driver output shaft 100 of the driver passes through the housing and extends into the interior of the housing. The braking component is installed outside the housing and is located on one side of the driver output shaft 100.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments, and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A brake assembly for braking a driver output shaft (100), characterized in that: include: A brake component (1), the brake component (1) comprising a brake portion (11) and an abutment portion (13), the abutment portion (13) being arranged on the brake portion (11); An elastic member (2) abuts against the abutting portion (13); Wherein, the elastic member (2) drives the braking part (11) to press and brake the driver output shaft (100).

2. The brake assembly according to claim 1, characterized in that: The brake assembly further comprises a rotating portion (12), wherein the rotating portion (12) is arranged on the brake portion (11), and the brake element (1) takes the rotating portion (12) as a rotation center.

3. The brake assembly according to claim 2, characterized in that: The braking portion (11) comprises a braking arc surface (111) extending along the circumference of the driver output shaft (100), a first end surface (112) extending toward the rotating portion (12), and a second end surface (113) extending toward the abutting portion (13).

4. The brake assembly according to claim 3, characterized in that: The braking cambered surface (111) corresponds to an angle of 90° to 270°.

5. The brake assembly according to claim 3, characterized in that: An elastic reinforcement portion (114) is provided on the braking cambered surface (111).

6. The brake assembly according to claim 3, characterized in that: The abutting portion (13) comprises a first abutting portion (13a) and a second abutting portion (13b); the elastic member (2) comprises a first elastic member (2a) and a second elastic member (2b); the first elastic member (2a) abuts against the first abutting portion (13a); the second elastic member (2b) abuts against the second abutting portion (13b); a first extension surface of the first abutting portion (13a) extending away from the first elastic member (2a) is arranged at a first angle to the second end surface (113); and a second extension surface of the second abutting portion (13b) extending away from the second elastic member (2b) is arranged at a second angle to the second end surface (113).

7. The brake assembly according to claim 3, characterized in that: The rotating part (12) is a rotating body structure, and the braking component (1) uses the rotation center line of the rotating part (12) as the rotation center line.

8. The brake assembly according to claim 7, characterized in that The rotation center line of the rotating portion (12) and the second end surface (113) are located on the same extension plane.

9. The brake assembly according to claim 1, characterized in that: The abutment portion (13) is provided with a groove, and the elastic member (2) is at least partially inserted into the groove.

10. The brake assembly according to claim 1, characterized in that The elastic member (2) extends outward from the surface of the abutment portion (13).

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