Seat heightening driving mechanism

Abstract

The utility model discloses a seat height adjustment driving mechanism which comprises a speed reduction part and an output part connected with the speed reduction part. The input part is connected with the speed reduction part; the input part comprises a brushless direct current motor, a worm arranged at the output end of the brushless direct current motor and a worm gear matched with the worm. The direct-current brushless motor replaces a direct-current brush motor, so that the direct-current brushless motor is stable in operation, relatively low in vibration noise, high in efficiency, low in energy consumption, environment-friendly, free of friction between a commutator and a carbon brush, capable of prolonging the service life by four times, capable of operating at a constant speed without load change within the working torque range of the motor, small in size, small in size and high in reliability. The motor has the advantages of simple structure, light weight, compact structure, convenience in installation and carrying and high power density.

Description

Technical Field

[0001] The utility model relates to the field of sofa height adjustment, in particular to a seat height adjustment driving mechanism. Background Art

[0002] At present, most of the seat height adjustment drive mechanisms on the market are still DC brush motors, which are noisy, short-lived, low-efficient, and have complex assembly processes;

[0003] Because most of the existing seat height adjustment drive mechanisms still have brush motors, the problem of high noise caused by the friction sound between the commutator and the carbon brush is unavoidable. Utility Model Content

[0004] Purpose of the utility model: to provide a seat height adjustment drive mechanism to solve the above problems existing in the prior art.

[0005] Technical solution: A seat height adjustment drive mechanism, comprising:

[0006] A speed reducing part, and an output part connected to the speed reducing part;

[0007] Also includes an input portion connected to the speed reduction portion;

[0008] The input part includes a brushless DC motor, a worm arranged at an output end of the brushless DC motor, and a worm wheel matched with the worm.

[0009] The utility model uses a brushless DC motor to replace a brushed DC motor, thereby avoiding the problem of high noise caused by friction between the commutator and the carbon brush of the brushed DC motor, thereby reducing the noise.

[0010] In a further embodiment, the speed reduction portion includes a speed reduction planetary gear set.

[0011] In a further embodiment, the worm gear is arranged at the input end of the reduction planetary gear set.

[0012] In a further embodiment, the output part includes an output gear sleeved on the output end of the reduction planetary gear set.

[0013] Beneficial effect: The utility model discloses a seat height adjustment drive mechanism. The utility model replaces a DC brushless motor with a DC brushless motor, thereby avoiding the problem of high noise caused by friction between the commutator and the carbon brush of the DC brushless motor, thereby reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] The accompanying drawings are marked as follows:

[0016] 1. Brushless DC motor; 2. Speed ​​reduction unit; 3. Worm; 4. Worm wheel; 5. Output gear. DETAILED DESCRIPTION

[0017] The present application relates to a seat height adjustment drive mechanism, which is explained in detail below through a specific implementation method.

[0018] Because most of the existing seat height adjustment drive mechanisms still have brush motors, the problem of high noise caused by the friction between the commutator and the carbon brush cannot be avoided;

[0019] The utility model uses a brushless DC motor to replace a brushed DC motor, thereby avoiding the problem of high noise caused by friction between the commutator and the carbon brush of the brushed DC motor, thereby reducing the noise.

[0020] A seat height adjustment drive mechanism, comprising:

[0021] A speed reducing unit 2, and an output unit connected to the speed reducing unit 2;

[0022] It also includes an input part connected to the speed reduction part 2;

[0023] The input part includes a brushless DC motor 1 , a worm 3 (fixed by laser welding) arranged at the output end of the brushless DC motor 1 , and a worm wheel 4 matched with the worm 3 .

[0024] The utility model uses a brushless DC motor to replace a brushed DC motor, thereby avoiding the problem of high noise caused by friction between the commutator and the carbon brush of the brushed DC motor, thereby reducing the noise.

[0025] The worm and the shaft in the utility model are welded by laser. Compared with the existing knurling design, the laser welding process is simple, the production efficiency is high, the reliability is high, and automation is easy to realize.

[0026] The speed reduction unit 2 includes a speed reduction planetary gear set.

[0027] The worm gear 4 is sleeved on the input end of the reduction planetary gear set.

[0028] The output part comprises an output gear 5 sleeved on the output end of the reduction planetary gear set.

[0029] When in use, the output gear 5 is meshed with the seat tooth plate, thereby driving the seat tooth plate to move, thereby completing the work of adjusting the height of the seat.

[0030] Working principle description: When the brushless DC motor 1 is powered on, it drives the worm 3 to rotate, drives the worm wheel 4 to rotate, and then drives the reduction planetary gear set to work, and then the output gear 5 outputs the output.

[0031] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings; however, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical scheme of the present invention, and these equivalent transformations all belong to the protection scope of the present invention.

Claims

1. A seat height adjustment drive mechanism, comprising: A speed reducing unit (2), and an output unit connected to the speed reducing unit (2); It is characterized in that it also includes an input part connected to the speed reduction part (2); The input part comprises a brushless DC motor (1), a worm (3) arranged at the output end of the brushless DC motor (1), and a worm wheel (4) matched with the worm (3).

2. A seat height adjustment drive mechanism according to claim 1, characterized in that: The speed reduction unit (2) includes a speed reduction planetary gear set.

3. The seat height adjustment drive mechanism according to claim 1, characterized in that: The worm gear (4) is sleeved on the input end of the reduction planetary gear set.

4. The seat height adjustment drive mechanism according to claim 1, characterized in that: The output part comprises an output gear (5) sleeved on the output end of the reduction planetary gear set.

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