CN110217142A - A kind of device for adjusting height of automobile seats - Google Patents

Abstract

The invention discloses an automobile seat height adjustment device, in which a double-axis motor is horizontally fixed between the upper slide rails of the lower slide rails slidingly fitted on the vehicle body floor, and the left and right output ends of the double-axis motor are connected with the The gear box is connected, the vertical output of the gear box is connected to the height adjustment link, and the height adjustment link is connected to the rear rocker that is rotatably connected to the upper slide rail; the upper end of the rear rocker is connected to the rear cross tube of the seat cushion, and the rear cross tube of the seat cushion The side plate is connected to the upper end of the front rocker, and the lower end of the front rocker is rotationally connected to the upper slide rail; the rear rocker, the side plate, the front rocker and the upper slide rail together form a double rocker mechanism; the seat cushion is installed on the between the side panels. The double-axis motor drives the rear rocker to rotate through the gearbox and the height-adjusting link, thereby pushing the double-rocker mechanism to drive the seat cushion installed between the side panels to achieve the purpose of adjusting the height of the seat; the gears at both ends of the double-axis motor The box is a worm reducer, and the double-sided worm reducer has a self-locking function of symmetrical locking.

Description

A car seat height adjustment device

technical field

The invention relates to the technical field of car seat structures, in particular to a height-adjustable device for a car seat.

Background technique

With the continuous development of automobile technology and driving concepts, there are more and more requirements for the functionality and structural diversity of car seats. Most of the existing car seat height adjustment mechanisms are complex in structure and unilaterally locked, which cannot meet the requirements of easy operation and high-intensity rate changes. The prior art has various operating implements and transmission structures for seat height adjustment, each with advantages and disadvantages. For example, the utility model of patent No. 201721253854.6 is a driver’s seat height adjustment mechanism, which is operated by a height adjustment pump, which not only takes up a lot of space but also has the potential disadvantage of failing the mechanism due to the high failure rate of the pump; another example is the patent No. 201310699698.6 An invention patent for a car seat height adjustment mechanism, which uses a claw plate, a two-way overrunning clutch, its multi-stage transmission star wheel and a circular sheave, and a spring limit is set between them. The complexity of this seat height adjustment device Needless to say, high cost and difficult debugging and maintenance, and because it is unilaterally adjusted and unilaterally locked, there is a potential safety hazard that it is difficult to cope with high-intensity rate changes.

Existing seats using a single-side locking system, when the vehicle is hit by the outside world, because the seat is a single-side locking system, according to the D'Alembert principle, the seat will tilt and twist to one side, forcing the occupant's body It will be tilted and twisted. When the impact force is strong enough, the human body will be twisted, and the spine may even be twisted. The bilateral locking system is proposed to solve this problem. With the bilateral locking system, when a strong external force hits, the two sides of the seat will maintain balance, so that the human body will try to maintain bilateral balance and will not twist to one side. , to ensure the balance and safety of the human body. Obviously, for the safety of occupants, sufficient attention must be paid to the defects in the prior art unilateral locking structure.

Contents of the invention

The purpose of the present invention is to overcome the defects of complex structure, inconvenient operation and locking bias existing in the car seat height adjustment mechanism of the prior art, and to provide a car with electric control, simple structure and double-sided locking safety configuration. Seat height adjustment device.

The purpose of the present invention is achieved through the following technical solutions.

A car seat height adjustment device, characterized in that two sliding rails 11A/11B are fixed side by side on the bottom of the vehicle body, and each of the two sliding rails 11A/11B is equipped with an upper sliding rail 13A/13B. Between the rails 13A/13B, a biaxial motor 2 is fixedly connected horizontally through the motor mounting bracket 1, and the left and right output ends of the biaxial motor 2 are respectively connected to the input ends of the gearbox 3A/3B fixed at both ends of the motor mounting bracket 1. The vertical output end of the box 3A/3B is connected to the front end of the symmetrically arranged height-adjusting link 4A/4B, and the rear end of the height-adjusting link 4A/4B is rotatably connected to the rear rocker on the upper slide rail 13A/13B 7A/7B is connected to the appropriate part, the appropriate part refers to the traction point Q, the position of the traction point Q on the rear rocker 7A/7B has a certain distance from the rotation point Z of the rear rocker 7A/7B, and the traction Point Q is not on the same straight line as the connection point of the front end of the height adjustment link 4A/4B and the rotation point Z of the rear rocker 7A/7B; the upper end of the rear rocker 7A/7B is connected with the rear cross tube 9 of the seat cushion, The rear cross tube 9 of the seat cushion is connected to the upper end of the front rocker 12A/12B through the side plate 10A/10B, and the lower end of the front rocker 12A/12B is rotatably connected to the upper slide rail 13A/13B; the rear rocker 7A/7B, the side plate 10A/10B, the front rocker 12A/12B and the upper slide rail 13A/13B together constitute a double rocker mechanism, wherein the side plate 10A/10B is used as the connecting rod of the double rocker mechanism, and the upper slide rail 13A/13B is used as the frame; The seat cushion is installed between the side panels 10A/10B.

The codes A and B represent the left and right components respectively.

In a preferred solution, the biaxial motor 2 is a stepper motor with shaft extensions at both ends.

In a preferred solution, the transmission 3A/3B is a worm reducer, and the direction of the output shafts of the transmission 3A and the transmission 3B is opposite; the double-sided worm reducer has a self-locking function of symmetrical locking.

In the preferred solution, the rear end of the height-adjusting link 4A/4B and the rear rocker 7A/7B rotatably connected to the upper slide rail 13A/13B pass through the energy-absorbing sheet 5A/5B and the energy-absorbing sheet 6A/7B and utilize the step Bolted.

In the preferred solution, the initial setting state of the angle between the rear rocker 7A/7B and the upper slide rail 13A/13B is 20-40°; this initial setting state reserves enough adjustment space for the raising or lowering of the seat, and Taking into account the higher rate of elevation change, it avoids the problem that the elevation rate approaches zero when the angle approaches 90°.

In a preferred solution, the optimal initial setting angle between the rear rocker 7A/7B and the upper slide rail 13A/13B is 25°.

The beneficial effects of the present invention are:

1. The electric operation is very convenient, and the action of the four-bar linkage mechanism is balanced and reliable;

2. It can meet the needs of various heights;

3. Double-sided locking, high safety;

4. The double-axis motor ensures the synchronization of the left and right four-bar linkages;

5. Simple structure and low manufacturing cost.

Description of drawings

Accompanying drawing 1 is the three-dimensional schematic diagram of a kind of embodiment structure of the present invention;

Accompanying drawing 2 is the schematic diagram of the principle that the motor drives the rear rocker through the transmission mechanism;

Accompanying drawing 3 is an exploded schematic diagram of an embodiment.

In the figure, motor mounting bracket 1; double-axis motor 2; gearbox 3A/3B; height-adjusting link 4A/4B; energy-absorbing sheet 5A/5B; energy-absorbing sheet 6A/6B; rear rocker 7A/7B; seat cushion Rear cross tube 9; side plate 10A/10B; lower rail 11A/11B; front rocker 12A/12B; upper rail 13A/13B; traction point Q; pivot point Z.

Detailed ways

The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the described embodiment.

Embodiment 1: As shown in Figure 1, a car seat height adjustment device, two slide rails 11A/11B are fixed side by side on the bottom plate of the vehicle body, and the codes A and B indicate the left component and the right component respectively; Each of the lower rails 11A/11B is equipped with an upper slide rail 13A/13B, and the two upper slide rails 13A/13B are horizontally fixedly connected with a double-axis motor 2 through a motor mounting bracket 1. The double-axis motor 2 is a shaft extension step at both ends. The stepper motor has the advantages of accurate and convenient control, and the shaft extensions at both ends can be used in one machine, especially to ensure the synchronization of the left and right transmission chains. The left and right output ends of the biaxial motor 2 are respectively connected to the input ends of the gear box 3A/3B fixed at both ends of the motor mounting bracket 1, and the vertical output ends of the gear box 3A/3B are connected to the symmetrically arranged height-adjusting connecting rods 4A/4B. The front end is connected, and the rear end of the height-adjusting link 4A/4B is connected to the traction point Q of the rear rocker 7A/7B that is rotatably connected to the upper slide rail 13A/13B. The traction point Q is on the rear rocker 7A/7B. There is a certain distance between the upper position and the rotation point Z of the rear rocker 7A/7B, and the traction point Q is connected to the front end connection point of the height adjustment link 4A/4B and the rotation point Z of the rear rocker 7A/7B, three points The relationship between them is not on the same straight line, to ensure that the traction of the height-adjusting connecting rod 4A/4B to the rear rocker 7A/7B makes the rear rocker 7A/7B produce torque. The specific settings are determined according to the size and load of the seat, and the speed requirements for seat adjustment. Generally, the distance between the pivot point Z of the rear rocker 7A/7B and the traction point Q is selected as 10-20 cm. It tends to take a large value when it is required to adjust quickly, and it tends to take a small value when the speed of adjustment is required to be fast. The rear cross tube 9 of the seat cushion is connected between the upper end of the rear rocker 7A and the rear rocker 7B, the rear end of the side plate 10A/10B is connected to the rear cross tube 9 of the seat cushion, and the front end of the side plate 10A/10B is connected to the front rocker 12A/ The upper end of 12B is connected, the lower end of the front rocker 12A/12B is rotationally connected with the upper slide rail 13A/13B; the rear rocker 7A/7B, the side plate 10A/10B, the front rocker 12A/12B and the upper slide rail 13A/13B are common A double rocker mechanism is formed, in which the side plate 10A/10B is used as the connecting rod of the double rocker mechanism, and the upper slide rail 13A/13B is used as the frame. When determining the length of the relevant components of the double rocker mechanism, the principle is to select the four-bar mechanism The four hinge points form four apex structures of a parallelogram, which can ensure that the seat moves in parallel all the time, and avoid the seat surface from tilting when moving; the seat cushion is installed between the side panels 10A/10B.

The transmission 3A/3B is a worm reducer, and the direction of the output shaft of the transmission 3A is opposite to that of the transmission 3B; the double-sided worm reducer has a self-locking function of symmetrical locking.

The rear end of the height-adjusting connecting rod 4A/4B is rotatably connected to the rear rocker 7A/7B on the upper slide rail 13A/13B through the energy-absorbing sheet 5A/5B and the energy-absorbing sheet 6A/6B and is connected by stepped bolts. The energy-absorbing sheet 5A/5B and the energy-absorbing sheet 6A/6B are used to absorb the external force if the external force acts on the car seat when the vehicle is impacted by the outside world. If the impact is severe, the energy-absorbing sheet will automatically Disconnect to protect the passengers on the seat. After the energy-absorbing sheet is broken and damaged, a new energy-absorbing sheet can be replaced.

The height adjustment connecting rod 4A/4B and the rear rocker 7A/7B are connected by stepped bolts, and the two can rotate relative to each other. There is a shaft in the middle of the stepped bolts, and the radius of the shaft changes in steps. The specific radius depends on the aperture structure of the connected parts. Variations, so one stepped bolt can connect several parts at the same time.

The initial setting state of the angle between the rear rocker 7A/7B and the upper slide rail 13A/13B is 20-40°; this initial setting state reserves enough adjustment space for the raising or lowering of the seat, and takes into account the elevation change At the same time, it avoids the problem that the lifting rate tends to zero when the angle approaches 90°.

As introduced in the background technology of this application, the existing seat adopts a unilateral locking system, so when the vehicle is hit by the outside, the seat is hit, because it is a unilateral locking system, the seat will When the external force is strong enough, the human body will be twisted and the spine may be broken. The double-sided locking system is to solve this problem. With the double-sided locking system, when the external force is applied, the two sides of the seat will maintain balance, so that the human body will try its best to maintain balance, and will not twist to one side, ensuring the balance of the human body. .

Embodiment 2: The optimal initial setting angle between the rear rocker 7A/7B and the upper slide rail 13A/13B is 25°. At this time, the traction point Q, the front connection point of the height adjustment link 4A/4B and the rear rocker The rotation point Z of 7A/7B, the three-point relationship should take the traction point as the apex to form a right-angle relationship, and then the torque generated by the traction force on the rear rocker reaches the maximum value.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. a kind of device for adjusting height of automobile seats, characterized in that left and right is fixed with twice glidepath side by side on underbody (11A/11B) is respectively furnished with upper sliding rail (13A/13B) in twice glidepath (11A/11B), in twice between sliding rail (13A/13B) By motor mounting rack (1) laterally be fixedly connected with dual-axle motor (2), two output end of left and right of dual-axle motor (2) respectively with It is fixed on the input terminal connection of the gear-box (3A/3B) at motor mounting rack (1) both ends, the vertical output of gear-box (3A/3B) End with it is symmetrically arranged be turned up connecting rod (4A/4B) front end connect, height-regulating connecting rod (4A/4B) rear end be rotatably connected to The suitable position of rear rocking bar (7A/7B) on upper sliding rail (13A/13B) connects, and the suitable position refers to towing point (Q), the traction The rotation point Z of position of the point (Q) on rear rocking bar (7A/7B) and rear rocking bar (7A/7B) have a certain distance, and the towing point (Q) with the rotation point (Z) of front end tie point and rear rocking bar (7A/7B) that connecting rod (4A/4B) is turned up, 3 points in same straight line On；The upper end of rocking bar (7A/7B) is connect with seat cushion rear cross-tube (9) afterwards, and seat cushion rear cross-tube (9) is by side plate (10A/10B) with before The upper end of rocking bar (12A/12B) connects, and the lower end of preceding rocking bar (12A/12B) and upper sliding rail (13A/13B) are rotatablely connected；Rocking bar afterwards (7A/7B), side plate (10A/10B), preceding rocking bar (12A/12B) and upper sliding rail (13A/13B) collectively form double rocker mechanism, Connecting rod of the latus inframedium (10A/10B) as double rocker mechanism, upper sliding rail (13A/13B) are used as rack；Seat cushion is mounted on side Between plate (10A/10B).

2. a kind of device for adjusting height of automobile seats according to claim 1, characterized in that dual-axle motor (2) is both ends Axis stretches stepper motor.

3. a kind of device for adjusting height of automobile seats according to claim 2, characterized in that speed changer (3A/3B) is snail Bar retarder, and speed changer (3A) is contrary with the output shaft of speed changer (3B)；Bilateral worm reducer has symmetrical locking Self-locking function.

4. a kind of device for adjusting height of automobile seats according to claim 3, characterized in that connecting rod (4A/4B) is turned up Rear end passes through energy-absorbing piece (5A/5B) and energy-absorbing piece with the rear rocking bar (7A/7B) being rotatably connected on sliding rail (13A/13B) It (6A/7B) and is connected using shoulder bolt.

5. a kind of device for adjusting height of automobile seats according to claim 1,2,3 or 4, characterized in that rear rocking bar (7A/ 7B) state is initially set as 20-40 ° with the angle of upper sliding rail (13A/13B)；This is initial set state as the raising of seat or Reduction all retains enough adjusting spaces, and has taken into account the higher rate of elevation variation, avoids the lifting when angle approaches 90 ° Rate level off to therewith zero deficiency.

6. a kind of device for adjusting height of automobile seats according to claim 5, characterized in that rear rocking bar (7A/7B) with it is upper The optimal initial of sliding rail (13A/13B) sets angle as 25 °.