Height adjusting structure of automobile seat cushion

Abstract

The utility model belongs to the technical field of automobile seats. The problem that in the prior art, a height adjusting structure is poor in use stability is solved. The height adjusting structure of the automobile seat cushion comprises a motor and a fixing support fixedly connected to the portion, close to one of rear connecting rods, of a rear transverse pipe, the motor is hinged to the fixing support, a lead screw in transmission connection with an output shaft of the motor is inserted into the motor, the lead screw is perpendicular to the rear transverse pipe, and the motor is hinged to the fixing support. The two ends of the lead screw extend out of the motor respectively, the lower end of the lead screw is hinged to the sliding rail support, hinge points of the lead screw, the motor and the rear connecting rod are distributed in a triangular shape, and when the motor is started, the motor moves in the axial direction of the lead screw. The height adjusting structure has the advantage that the use stability of the height adjusting structure can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of automobile seats and relates to a height-adjusting structure for an automobile seat cushion. Background Art

[0002] At present, cars have entered thousands of households and become the main means of transportation for people's daily travel. Car seats are seats installed inside the car for drivers and passengers. As important interior parts of the car, car seats need to meet the two major requirements of comfort and height adjustment convenience. Due to the different heights of different drivers, the driver's car seat also needs to have the function of height adjustment, so that different drivers can adjust the seat to the most comfortable and most familiar sitting angle through adjustment operations, so as to obtain the best field of view and better operate the steering wheel and control the clutch pedal, accelerator pedal and brake pedal, etc., to ensure driving safety.

[0003] There are two main ways to adjust the height of existing car seats, namely manual adjustment and electric adjustment (the manual adjustment method is disclosed in a Chinese patent document for a car driver's seat (application number: 201520450073.0)). Among them, the electric adjustment method is more and more widely used in car seats because it is more convenient to adjust and can more accurately control the position and angle of the seat.

[0004] For example, a Chinese patent document discloses an electric height-adjusting device for a car seat (application number: 201721141457.X), which is arranged between a slide rail assembly and a seat frame, and includes a control component, an electric height-adjusting pump, a limit plate, a rear tooth plate and a rear cross tube; the control component is connected to the electric height-adjusting pump; the rear tooth plate is fixedly connected to the rear cross tube and movably mounted on the seat frame through the rear cross tube, one end of the rear tooth plate is movably mounted on the slide rail assembly, and a limit slot is provided on the rear tooth plate; the electric height-adjusting pump is arranged on the outside of the seat frame and connected to the rear tooth plate through a gear; the limit plate is movably mounted on the outside of the gear of the electric height-adjusting pump through a central opening, one end of the limit plate is fixedly mounted on the seat frame, and the other end is fixed to the seat frame by a bolt passing through the limit slot.

[0005] In summary, except for the electric height adjustment pump and control components, the other components of the electric height adjustment structure of the existing automobile seat are the same as the manual height adjustment structure, including an assist spring arranged in the rear cross tube (also called the rear drive tube or the rear connecting rod), a height adjustment gear plate fixedly connected to the rear cross tube, and a basic structure of a height adjustment gear meshed with the height adjustment gear plate and used to drive the height adjustment gear plate to swing up and down. Among them, the processing accuracy requirements of the height adjustment gear and the height adjustment gear plate are relatively high to avoid tooth jumping, tooth sliding and tooth top during actual use (tooth jumping and tooth sliding refer to the jumping contact between the height adjustment gear and the height adjustment gear plate during use, and tooth top refers to the situation where the teeth of the height adjustment gear and the height adjustment gear plate are stuck to each other during use), which makes the existing height adjustment structure have poor stability in use. Summary of the invention

[0006] The purpose of the utility model is to solve the above problems in the existing technology and propose a height adjustment structure for a car seat cushion. The technical problem to be solved by the utility model is how to improve the stability of the height adjustment structure.

[0007] The purpose of the utility model can be achieved through the following technical solutions:

[0008] A height adjustment structure for a car seat cushion, the car seat comprises a slide rail bracket and a seat cushion frame arranged on the slide rail bracket, the seat cushion frame comprises two seat cushion side panels and a rear cross tube connecting the two seat cushion side panels, both ends of the rear cross tube are respectively fixedly connected to a rear connecting rod hinged to the slide rail bracket, and its characteristic is that the height adjustment structure comprises a motor and a fixed bracket fixedly connected to a portion of the rear cross tube close to one of the rear connecting rods, the motor is hinged to the fixed bracket, a screw rod connected to its output shaft for transmission is inserted on the motor, the screw rod is vertically arranged to the rear cross tube, both ends of the screw rod respectively extend out of the motor and the lower end is hinged to the slide rail bracket, the hinge points of the screw rod, the motor and the rear connecting rod are distributed in a triangle, and when the motor is started, the motor moves along the axial direction of the screw rod.

[0009] The height adjustment structure of the automobile seat cushion is achieved by arranging a fixed bracket on the existing rear transverse tube, and hingedly connecting a motor to the fixed bracket and transmittingly connecting a screw rod with a lower end hinged on the fixed bracket, so that when the motor is started, the motor can move up and down relative to the screw rod and can drive the seat cushion frame to swing up and down through the fixed bracket to achieve the height adjustment or lowering of the seat. The structure is simple, and in addition, the fixed bracket is arranged at a position adjacent to the rear transverse tube and one of the rear connecting rods, the motor is hinged on the fixed bracket, and the screw rod is arranged vertically to the rear transverse tube, so that the hinge points of the screw rod, the motor and the rear connecting rod are distributed in a triangle, and the triangle has good stability. When the motor is stationary, the screw rod, the motor and the rear connecting rod can be kept in a relatively static state, thereby improving the use stability of the height adjustment structure.

[0010] In addition, the fixed bracket is fixedly connected to the position of the rear cross tube near one of the rear connecting rods, the motor is hinged on the fixed bracket and is transmission-connected to a screw rod which is vertically arranged with the rear cross tube, so that the height adjustment structure of the automobile seat cushion is compact, that is, the height adjustment structure occupies less horizontal space during installation, and the installation space required is also as small as possible, so as to facilitate the installation of devices such as seat gravity detection system and seat leg support under the seat cushion frame.

[0011] In the above-mentioned height adjustment structure of a car seat cushion, a rotatable worm gear is arranged on the motor, the worm gear is sleeved on the screw and is threadedly connected to the screw, and the output shaft of the motor has an external thread and meshes with the worm gear. When the motor is started, the output shaft of the motor rotates, and the output shaft of the motor drives the worm gear to rotate synchronously. Since the lower end of the screw connected to the worm gear is hinged on the slide rail bracket, the screw cannot rotate with the worm gear, so the worm gear rotates and drives the motor to make a linear motion along the axial direction of the screw. At the same time, by sleeved the worm gear on the screw and threadedly connected to the screw, and by providing an external thread on the output shaft of the motor and meshing with the worm gear, stepless adjustment is achieved, thereby improving the adjustment accuracy of the height adjustment structure of the car seat cushion, and making the screw and worm gear connected by thread have a self-locking function, thereby further improving the use stability of the height adjustment structure.

[0012] In the above-mentioned height adjustment structure of a car seat cushion, the motor has a connection part, which is arranged around the outer peripheral side of the screw rod, and the two sides of the fixed bracket are respectively provided with a flange, one end of each flange is hinged to the connection part, and the other end is provided with an arc-shaped part adapted to the tube wall of the rear transverse tube, and the arc-shaped part is abutted and connected to the rear transverse tube. By providing flanges on both sides of the fixed bracket, on the one hand, it is convenient to hinge the connection part between the fixed bracket and the motor body, and on the other hand, by providing an arc-shaped part adapted to the tube wall of the rear transverse tube on the flange, it is convenient to weld the fixed bracket and the rear transverse tube, and ensure the stability of the connection between the two.

[0013] In the above-mentioned height adjustment structure of a car seat cushion, the slide rail bracket has a fixing portion bent upward, the worm gear is located between the fixing portion and the fixing bracket, and between the output shaft of the motor and the rear transverse tube, and the output shaft of the motor is arranged parallel to the rear transverse tube. By arranging the output shaft of the motor parallel to the rear transverse tube and arranging the worm gear between the fixing portion and the fixing bracket and between the output shaft of the motor and the rear transverse tube, the height adjustment structure of the car seat cushion is made more reasonable and compact, and the installation space of the height adjustment structure is further saved.

[0014] In the above-mentioned height adjustment structure of a car seat cushion, the fixing part and the fixing bracket are arranged relatively up and down, the lower end of the screw rod is hinged on the fixing part, and the upper end of the screw rod is located between the two flanges. The above-mentioned structure allows the fixing bracket and the motor to be arranged up and down in sequence, making full use of the vertical space under the seat, so that the height adjustment structure occupies less horizontal space during installation, thereby freeing up more space for installing devices such as a seat gravity detection system and a seat leg support under the seat cushion frame, and at the same time, the movement direction of the motor body relative to the transmission screw rod is still longitudinal, thereby reducing the activity space required for the height adjustment structure.

[0015] In the above-mentioned height adjustment structure of a car seat cushion, a hinge hole 1 is provided at one end of the flange close to the connection part, and hinge holes 2 are provided at the connection part of the motor at positions corresponding to the two hinge holes 1, and the hinge holes 1 and 2 on the same side are hinged by rivets, and the lower end of the screw rod is flat and hinged to the fixed part of the slide rail bracket by rivets. The above-mentioned structure makes the connection structure between the fixed bracket and the motor body simple, requires a small installation space and has high reliability.

[0016] In the above-mentioned height adjustment structure of a car seat cushion, the edge of the rear connecting rod has a flange portion arranged toward the motor. By providing the flange portion, the structural strength of the rear connecting rod itself is improved on the one hand, and the flange portion is arranged toward the motor on the other hand, which can protect the motor.

[0017] Compared with the prior art, the advantages of the height-adjusting structure of the automobile seat cushion are that the motor of the height-adjusting structure of the automobile seat cushion can make linear motion along the axial direction of the screw rod and drive the cushion frame to swing up and down through the fixed bracket to achieve the height adjustment or lowering of the seat. The structure is simple and compact, and the installation space required is small. At the same time, the hinge points of the screw rod, the motor and the rear connecting rod are arranged in a triangular distribution. The triangle has good stability. When the motor is stationary, the screw rod, the motor and the rear connecting rod can be kept in a relatively static state, thereby improving the use stability of the height-adjusting structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a three-dimensional structural schematic diagram of the height adjustment structure of the automobile seat cushion viewed from the rear to the front.

[0019] Figure 2 The utility model is a three-dimensional structural schematic diagram of the height adjustment structure of the automobile seat cushion viewed from the front to the back.

[0020] Figure 3 The invention is a structural schematic diagram of the height adjustment structure of the automobile seat cushion viewed from the rear to the front.

[0021] Figure 4 The utility model is a three-dimensional structural schematic diagram of the height adjustment structure of the automobile seat cushion viewed from bottom to top.

[0022] Figure 5 It is an exploded view of the height adjustment structure of the car seat cushion.

[0023] Figure 6 The invention is a three-dimensional structural schematic diagram of a motor of a height adjustment structure of a car seat cushion.

[0024] Figure 7 The invention is a three-dimensional structural schematic diagram viewed from the rear to the front after the seat cushion of the automobile seat is raised.

[0025] Figure 8 The utility model is a three-dimensional structural schematic diagram viewed from the front to the back after the seat cushion of the automobile seat is raised.

[0026] Fig. 9 The invention is a three-dimensional structural schematic diagram viewed from bottom to top after the seat cushion of the automobile seat is raised.

[0027] Fig.10 The invention is a schematic diagram of the structure after the output shaft, worm gear and lead screw of the automobile seat cushion motor are connected.

[0028] In the figure, 1, seat cushion frame; 1a, seat cushion side plate; 1b, rear cross tube; 1c, front cross tube; 2, rear connecting rod; 2a, flanged portion; 3, motor; 3a, connecting portion; 3a1, hinge hole 2; 3b, output shaft; 3b1, external thread; 4, fixed bracket; 4a, flanged portion; 4a1, arc-shaped portion; 4b, hinge hole 1; 5, slide rail bracket; 5a, fixed portion; 6, screw rod; 7, worm gear. DETAILED DESCRIPTION

[0029] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0030] A height adjustment structure for a car seat cushion, referring to Figure 1-10 The automobile seat includes a slide rail bracket 5 and a seat cushion frame 1 arranged on the slide rail bracket 5, the seat cushion frame 1 includes two seat cushion side panels 1a and a rear transverse tube 1b connecting the two seat cushion side panels 1a, and the two ends of the rear transverse tube 1b are respectively fixedly connected with a rear connecting rod 2 hinged to the slide rail bracket 5. The height adjustment structure includes a motor 3 and a fixed bracket 4 fixedly connected to the rear transverse tube 1b near one of the rear connecting rods 2. The motor 3 is hinged on the fixed bracket 4, and a screw rod 6 is inserted on the motor 3 and is transmission-connected to its output shaft 3b. The screw rod 6 is vertically arranged with the rear transverse tube 1b, and the two ends of the screw rod 6 extend out of the motor 3 respectively and the lower end is hinged on the slide rail bracket 5. The hinge points of the screw rod 6, the motor 3 and the rear connecting rod 2 are distributed in a triangle. When the motor 3 is started, the motor 3 moves along the axial direction of the screw rod 6.

[0031] Specifically, refer to Figure 1-10 Specifically, the motor 3 is provided with a rotatable worm wheel 7, the worm wheel 7 is sleeved on the screw rod 6 and is threadedly connected to the screw rod 6, both ends of the worm wheel 7 can be arranged on the housing of the motor 3 through bearings, the output shaft 3b of the motor 3 has an external thread 3b1 and meshes with the worm wheel 7; the motor 3 has a connecting portion 3a, the connecting portion 3a is arranged around the outer circumference of the screw rod 6, and the two sides of the fixed bracket 4 are respectively provided with a flange 4a, one end of each flange 4a is hinged to the connecting portion 3a, and the other end thereof is provided with an arc portion 4a1 adapted to the tube wall of the rear cross tube 1b, and the arc portion 4a1 is abutted and connected to the rear cross tube 1b. More specifically, referring to Figure 1-10 The slide rail bracket 5 has a fixing portion 5a bent upward, the worm gear 7 is located between the fixing portion 5a and the fixing bracket 4, and between the output shaft 3b of the motor 3 and the rear transverse tube 1b, and the output shaft 3b of the motor 3 is arranged parallel to the rear transverse tube 1b; the fixing portion 5a and the fixing bracket 4 are arranged opposite to each other up and down, the lower end of the screw rod 6 is hinged on the fixing portion 5a, and the upper end of the screw rod 6 is located between the two flanges 4a. In this embodiment, the flange 4a is preferably provided with a hinge hole 1 4b at one end close to the connecting portion 3a, and the connecting portion 3a of the motor 3 is provided with hinge holes 2 3a1 at positions corresponding to the two hinge holes 1 4b, and the hinge holes 1 4b and hinge holes 2 3a1 on the same side are hinged by rivets, and the lower end of the screw rod 6 is flat and hinged to the fixing portion 5a of the slide rail bracket 5 by rivets; preferably, the edge of the rear connecting rod 2 has a flange portion 2a arranged toward the motor 3.

[0032] The following will explain the working principle of the height adjustment structure of the car seat cushion:

[0033] When the height of the car seat needs to be adjusted, the motor 3 is started, the output shaft 3a of the motor 3 rotates, and the worm gear 7 meshing with the output shaft 3a rotates synchronously. Since the lower end of the screw rod 6 threadedly connected to the worm gear 7 is hinged on the slide rail bracket 5, the worm gear 7 rotates and drives the motor 3 to make a linear motion along the axial direction of the screw rod 6. When the motor 3 moves upward along the screw rod 6, the motor 3 drives the end of the fixed bracket 4 hinged to the connecting part 3a to move upward synchronously. Correspondingly, at this time, the end of the fixed bracket 4 fixedly connected to the rear cross tube 1b swings downward. At the same time, the fixed bracket 4 synchronously drives the seat cushion frame through the rear cross tube 1b and the rear connecting rod 2. 1, the rear end of the seat frame 1 swings downward, and correspondingly, the front end of the seat cushion frame 1 swings upward to achieve the height adjustment of the seat, and the motor 3 forms a self-locking state after the seat height adjustment is completed; when the motor 3 moves downward along the screw rod 6, the motor 3 drives the end of the fixed bracket 4 hinged to the connecting part 3a to move downward synchronously, and correspondingly, the end of the fixed bracket 4 fixedly connected to the rear cross tube 1b swings upward, and at the same time, the fixed bracket 4 synchronously drives the rear end of the seat cushion frame 1 to swing upward through the rear cross tube 1b and the rear connecting rod 2, and correspondingly, the front end of the seat cushion frame 1 swings downward to achieve the lowering of the seat, and the motor 3 forms a self-locking state after the seat lowering is completed.

[0034] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A height adjustment structure for a car seat cushion, the car seat comprising a slide rail bracket (5) and a seat cushion frame (1) arranged on the slide rail bracket (5), the seat cushion frame (1) comprising two seat cushion side panels (1a) and a rear transverse tube (1b) connecting the two seat cushion side panels (1a), and the two ends of the rear transverse tube (1b) are respectively fixedly connected with a rear connecting rod (2) hinged to the slide rail bracket (5), characterized in that: The height adjustment structure comprises a motor (3) and a fixed bracket (4) fixedly connected to a portion of a rear transverse tube (1b) close to one of the rear connecting rods (2); the motor (3) is hinged on the fixed bracket (4); a screw rod (6) connected to the output shaft (3b) of the motor (3) is inserted into the motor (3); the screw rod (6) is arranged vertically to the rear transverse tube (1b); the two ends of the screw rod (6) extend out of the motor (3) respectively and the lower end is hinged to the slide rail bracket (5); the hinge points of the screw rod (6), the motor (3) and the rear connecting rod (2) are arranged in a triangular distribution; when the motor (3) is started, the motor (3) moves along the axial direction of the screw rod (6).

2. The height adjustment structure of a car seat cushion according to claim 1, characterized in that: The motor (3) is provided with a rotatable worm wheel (7), the worm wheel (7) is sleeved on the screw rod (6) and is threadedly connected to the screw rod (6), and the output shaft (3b) of the motor (3) has an external thread (3b1) and is meshed with the worm wheel (7).

3. The height adjustment structure of a car seat cushion according to claim 2, characterized in that: The motor (3) has a connecting portion (3a), and the connecting portion (3a) is arranged around the outer peripheral side of the screw rod (6). The two sides of the fixed bracket (4) are respectively provided with a flange (4a), one end of each flange (4a) is hinged to the connecting portion (3a), and the other end thereof is provided with an arc portion (4a1) adapted to the tube wall of the rear transverse tube (1b), and the arc portion (4a1) is abutted and connected to the rear transverse tube (1b).

4. The height adjustment structure of a car seat cushion according to claim 3, characterized in that: The slide rail bracket (5) has a fixing portion (5a) bent upward, the worm gear (7) is located between the fixing portion (5a) and the fixing bracket (4), and between the output shaft (3b) of the motor (3) and the rear transverse tube (1b), and the output shaft (3b) of the motor (3) is arranged parallel to the rear transverse tube (1b).

5. The height adjustment structure of a car seat cushion according to claim 4, characterized in that: The fixing part (5a) and the fixing bracket (4) are arranged opposite to each other in the upper and lower parts, the lower end of the screw rod (6) is hinged on the fixing part (5a), and the upper end of the screw rod (6) is located between the two flanges (4a).

6. The height adjustment structure of a car seat cushion according to claim 4 or 5, characterized in that: A hinge hole 1 (4b) is provided at one end of the flange (4a) close to the connecting portion (3a); hinge holes 2 (3a1) are provided at positions of the connecting portion (3a) of the motor (3) corresponding to the two hinge holes 1 (4b); the hinge holes 1 (4b) and 2 (3a1) located on the same side are hinged to each other through rivets; the lower end of the screw rod (6) is flat and hinged to the fixing portion (5a) of the slide rail bracket (5) through rivets.

7. A height adjustment structure for a car seat cushion according to claim 1 or 2 or 3 or 4 or 5, characterized in that: The edge of the rear connecting rod (2) is provided with a flange portion (2a) arranged toward the motor (3).

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