Seat push rod driving mechanism

Abstract

The utility model discloses a seat push rod driving mechanism. The seat push rod driving mechanism comprises a box body; the driving part comprises a brushless direct current motor connected with the box body and a driving shaft arranged at the output end of the brushless direct current motor, and a worm is connected to the driving shaft; the moving part comprises a sleeve connected with the box body and a guide rod which is arranged in the sleeve and linearly moves along the sleeve; the transmission part comprises a lead screw matched with the guide rod and a worm wheel arranged on the lead screw in a sleeving mode and matched with the worm. A traditional direct current brush motor is replaced by the brushless direct current motor, so that the brushless direct current motor has the advantages of stable operation, relatively small vibration noise, high efficiency, low energy consumption, environmental friendliness, no friction between a commutator and a carbon brush, four times of service life of a product, and capability of running at a constant speed in a working torque range of the motor without load change; the motor has the advantages of small size, light weight, compact structure, convenience in installation and carrying and high power density.

Description

Technical Field

[0001] The utility model relates to a driving system, in particular to a seat push rod driving mechanism. Background Art

[0002] At present, most of the automotive sofa push rod mechanisms on the market still use DC brushed motors. Currently, this method of using brushed motors is prone to high noise, short life, low efficiency, and complex assembly process;

[0003] The high noise of brushed motors is mainly caused by the friction noise between the commutator and the carbon brushes of the brushed motors. Utility Model Content

[0004] Purpose of the utility model: to provide a seat push rod driving mechanism to solve the above problems existing in the prior art.

[0005] Technical solution: A seat push rod driving mechanism, comprising:

[0006] A box body, wherein a limiting groove is provided in the box body;

[0007] A driving member, comprising a brushless DC motor connected to the housing, and a driving shaft arranged at an output end of the brushless DC motor, wherein a worm is connected to the driving shaft;

[0008] The moving part includes a sleeve connected to the box body, and a guide rod arranged in the sleeve and moving linearly along the sleeve;

[0009] The transmission member comprises a lead screw matched with the guide rod, and a worm wheel sleeved on the lead screw and matched with the worm.

[0010] The brushless DC motor has a diameter of 36 mm, which is changed from the original 39 mm to 36 mm, thereby reducing the volume and weight.

[0011] In a further embodiment, a friction ring adapted to the limiting groove is installed on the driving shaft, and the friction ring cooperates with the box body to increase the rotation resistance of the motor and improve the self-locking force of the motor.

[0012] A limiting groove is provided in the box body to accommodate the friction ring and to limit the friction ring when the motor shaft rotates.

[0013] In a further embodiment, the box body includes an upper box body and a lower box body connected to the upper box body.

[0014] In a further embodiment, a thread groove is formed on the inner wall of the guide rod, and the thread groove is matched with the texture on the screw rod.

[0015] In a further embodiment, a slide groove is provided on the surface of the guide rod, and a fixed slider adapted to the slide groove is provided in the sleeve. By designing the slide groove and the fixed slider, the guide rod can move linearly in the sleeve without rotating.

[0016] Beneficial effect: The utility model discloses a seat push rod driving mechanism. The utility model replaces the DC brush motor with a DC brushless motor, thereby avoiding the friction sound between the commutator and the carbon brush of the DC brush motor, which causes high noise, and thus reduces noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 It is a schematic diagram of the friction ring structure of the utility model.

[0019] The accompanying drawings are marked as follows:

[0020] 1. Brushless DC motor; 2. Lower housing; 3. Upper housing; 4. Worm gear; 5. Lead screw; 6. Guide rod; 7. Sleeve; 8. Friction ring. DETAILED DESCRIPTION

[0021] The present application relates to a seat push rod driving mechanism, which is explained in detail below through a specific implementation method.

[0022] A seat push rod driving mechanism, comprising:

[0023] A box body, wherein a limiting groove is provided in the box body;

[0024] The driving member comprises a brushless DC motor 1 connected to the housing, and a driving shaft arranged at the output end of the brushless DC motor 1, a worm being connected to the driving shaft, and a friction ring 8 matching the limit groove being mounted on the driving shaft;

[0025] The friction ring 8 is open and assembled on the motor shaft. Then there is a limit groove in the box body for clamping the boss of the friction ring. The friction ring rubs against the shaft to increase the friction force for braking.

[0026] The moving part includes a sleeve 7 connected to the box body, and a guide rod 6 arranged in the sleeve 7 and moving linearly along the sleeve 7;

[0027] The transmission member includes a lead screw 5 matched with the guide rod 6, and a worm wheel 4 sleeved on the lead screw 5 and matched with the worm.

[0028] The box body includes an upper box body 3 and a lower box body 2 connected to the upper box body 3 .

[0029] The inner wall of the guide rod 6 is provided with a thread groove, and the thread groove is adapted to the texture on the screw rod 5 .

[0030] The guide rod 6 has a sliding groove on its surface, and a fixed slider matched with the sliding groove is provided in the sleeve 7. By designing the sliding groove and the fixed slider, the guide rod 6 can move linearly in the sleeve 7 without rotating.

[0031] Working principle description: When the brushless DC motor 1 is powered on, it drives the worm to rotate, drives the worm wheel 4 to rotate, drives the lead screw 5 to rotate, and the guide rod 6 realizes linear motion in the sleeve 7 through the rotation of the lead screw 5, thereby realizing the lifting and retraction of the sofa seat installed at the end of the guide rod 6. A friction ring 8 is installed on the shaft of the brushless DC motor 1, which cooperates with the box to increase the rotation resistance of the motor and improve the self-locking force of the motor.

[0032] The whole device is installed in a vertical position.

[0033] 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 push rod driving mechanism, characterized in that: include: A box body, wherein a limiting groove is provided in the box body; It is characterized by further comprising: A driving member, comprising a brushless DC motor (1) connected to the housing, and a driving shaft arranged at the output end of the brushless DC motor (1), the driving shaft being connected to a worm, and the driving shaft being provided with a friction ring (8) adapted to the limit groove; The moving part comprises a sleeve (7) connected to the box body, and a guide rod (6) arranged in the sleeve (7) and moving linearly along the sleeve (7); The transmission member comprises a lead screw (5) adapted to the guide rod (6), and a worm wheel (4) sleeved on the lead screw (5) and adapted to the worm.

2. A seat push rod driving mechanism according to claim 1, characterized in that: The box body comprises an upper box body (3) and a lower box body (2) connected to the upper box body (3).

3. A seat push rod driving mechanism according to claim 1, characterized in that: The inner wall of the guide rod (6) is provided with a thread groove, and the thread groove is adapted to the texture on the screw rod (5).

4. A seat push rod driving mechanism according to claim 1, characterized in that: A sliding groove is provided on the surface of the guide rod (6), and a fixed sliding block adapted to the sliding groove is provided in the sleeve (7).

5. A seat push rod driving mechanism according to claim 1, characterized in that: The guide rod () 6 has a sliding groove on its surface, and the sleeve (7) is provided with a fixed sliding block adapted to the sliding groove.

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