RU2216460C2 - Device to adjust relative position of backrest and cushion of vehicle seat - Google Patents

Abstract

FIELD: transport engineering. SUBSTANCE: proposed device has movable bracket supported by fixed bracket by means of axle and providing possibility of rotation of one bracket relative to the other, and lock mechanism. Said mechanism is made in form of newly introduced tie-rod hinge mounted to form power arm relative to axle and located in hinge joint installed in fixed bracket for adjusting its travel in cross direction relative to axle. Tie-rod can be made in form of lead screw, rack with grooves, rod of hydro- or pneumocylinder with piston. Cylinder space is divided into two chambers interconnected by channel accommodating shutoff device, for instance, plug cock. Invention provides automation of control of working member drive owing to possibility of use of vehicle storage battery or its pneumatic or hydraulic systems. EFFECT: simplified design, reduced labor input in manufacture. 7 cl, 6 dwg

Description

 The invention relates to seats, in particular to devices for regulating the relative position of the seat cushion and backrest of vehicles.

 A car hinge is known (see USSR AS 358222) comprising a movable back bracket pivotally connected by an axis to a fixed seat bracket, a stopper for securing the back bracket relative to the seat bracket in an inclined position, and a control handle mounted on the shank of the hinge axis, wherein the stopper is made in the form of a gear gear with internal gearing rigidly fixed to one of the brackets, interacting with the external gearing gear, rigidly connected to the other bracket and mounted on an ecc ntrike hinge axis, having an eccentricity of at least the gear tooth height.

 In addition, the movable bracket of the back is equipped with a washer rigidly connected to it, overlapping the surface of the gear with internal gearing, to which the washer is rigidly supported, resting on the shank of the hinge axis through the holders forming a cavity for accommodating the elastic ring.

 In addition, the eccentric of the hinge axis is installed in the hole of the sleeve, covered by a gear with an external gearing rigidly connected to it.

 The disadvantage of this device is the complexity due to the presence of additional axles and additional brackets.

 A device is known (see USSR patent 1041026) for adjusting the relative position of the back and seat cushion, comprising a movable bracket supported by a first fixed bracket with a control axis with an eccentric section, and a second fixed bracket fixed to the first fixed bracket, the movable bracket being provided a gear engaged with a gear wheel differing in the number of teeth by at least one from the number of gear teeth and connected by means of studs holes in it, with fixed brackets, in which the gear is mounted on the eccentric portion of the axis, the studs are mounted in the holes of the gear, the ends of at least some of the studs are rigidly connected to both fixed brackets, and the movable bracket is located between them, while the brackets equipped with elements for their relative directional rotation.

 These elements are made in the form of protrusions that are located on the movable bracket and are mounted to move in an annular groove in one of the fixed brackets, while the movable bracket is attached to the back and the fixed bracket to the seat cushion.

This device eliminates some of the disadvantages of the analogue on.with. 358222, for example, it is simpler in design, but has the following disadvantages:
- the complexity and high complexity of manufacturing, due to the presence of gears and the need for their manufacture and installation;
- limited ability to automate the drive of the device due to the presence of an eccentric, which can only be installed from the side.

 The device according to the patent of the USSR 1041026 taken as a prototype, because has with the proposed solution the greatest number of common features.

 The objective of the proposed solution is to simplify the device by reducing the complexity of manufacturing and simplifying the manufacturing technology of its elements and expanding the ability to automate the control of the drive of the working elements of the device due to the possibility of using car batteries or its pneumatic or hydraulic systems.

 The task is carried out by the fact that in the known device containing a movable bracket supported by a fixed bracket with an axis that rotates one bracket relative to another, and the locking mechanism, the locking mechanism is made in the form of a newly introduced rod, pivotally mounted to form a power arm relative to the axis and placed in a hinge installed in the fixed bracket with the ability to control its movement in the transverse axis direction.

 In this case, the thrust can be made in the form of a lead screw, a rack with grooves, a rod of a hydraulic or pneumatic cylinder with a piston.

 In addition, the cylinder cavity is divided into two chambers, interconnected by a channel in which a locking device, for example a cork valve, is placed.

Figure 1 shows the main view of the device with traction in the form of a lead screw, section;
figure 2 is a section aa of figure 1;
figure 3 is a section bB of figure 1;
in FIG. 4 - the main view of the device with traction in the form of a rail with grooves, section;
figure 5 is a section aa of figure 4;
Fig.6 is a main view of the device with a thrust in the form of a rod of a pneumatic or hydraulic cylinder, a section.

 The proposed device for adjusting the relative position of the back and seat cushion contains a movable bracket 1 supported by a fixed bracket 2 with a transverse axis 3, which rotates one bracket relative to another, and a locking mechanism made in the form of a rod 4. The rod 4 is pivotally mounted in the hinge 5 of the bracket 1 with the formation of the power arm L relative to the transverse axis 3 and with the possibility of regulating its movement in the transverse axis 3 to the direction of the hinge 6 mounted in a fixed crown matte 2.

 The rod 4 can be made in the form of a lead screw mating with the nut (thread) of the hinge 6 of the fixed bracket 2.

 A thrust 4 in the form of a lead screw can be controlled by the vehicle's electrical system through an electric motor (not shown) integrated in the thrust 4 drive.

 The rod 4 can be made in the form of a rail with grooves 7 and protrusions 8, conjugated with the elements of the latch 9, mounted in the hinge 6 of the fixed bracket 2, spring-loaded 10. The latch 9 can be made in the form of a plate with a groove 11 of variable cross section, the larger of the sections interacts with the rod 4, and a smaller section interacts with the groove 7 of the rod 4 at the time of fixation in the groove of the hinge 6.

 Rod 4 can be made in the form of a rod 12 of a hydraulic or pneumatic cylinder 13 with a piston 14, while the cylinder 13 is mounted on a hinge 6 of the fixed bracket 2.

 The capacity of the cylinder 13 is divided by the piston 14 into two chambers 15 and 16, interconnected by a channel 17, in which a locking device 18 is placed, for example a plug valve 19 with a jet 20.

 The chambers 15 and 16 can be connected to the supply line of the working fluid (for example, oil), connected to a high pressure oil system M or to a compressor of an engine (automobile), controlled, for example, via a distributor (not shown).

 The device operates as follows.

 The driver, sitting on the seat and driving (traction or rectilinear motion) traction 4, sets the seatback relative to the cushion to the angle β required for him, and disconnecting the traction drive or removing his arm from the drive, fixes the backrest in the set position.

 Using the proposed solution will reduce the complexity of manufacturing the frame of the seat and will create the ability to automate the control of the drive of the working elements of the device through the use of electrical energy of the car or its hydraulic or pneumatic systems.

Claims (7)

 1. A device for adjusting the relative position of the back and seat cushion, comprising a movable bracket supported by a fixed bracket using a transverse axis, which rotates one bracket relative to another, and a locking mechanism, characterized in that the locking mechanism is made in the form of a newly introduced rod placed in the hinge installed in the fixed bracket with the possibility of regulating its movement in the direction transverse to the said axis with the formation of the power arm but the same axis through the hinge of the movable bracket.  2. The device according to p. 1, characterized in that the thrust is made in the form of a lead screw, coupled with the nut (thread) of the hinge of the fixed bracket.  3. The device according to paragraphs. 1 and 2, characterized in that the thrust is made in the form of a lead screw with the ability to control by means of the vehicle's electrical system through an electric motor integrated in the thrust drive.  4. The device according to p. 1, characterized in that the rod is made in the form of a rail with grooves and protrusions associated with elements of a spring-loaded latch mounted in a hinge of a fixed bracket.  5. The device according to p. 4, characterized in that the latch is made in the form of a plate with a groove of variable cross-section, where the larger cross section interacts with the rod, and the smaller one with the groove of the rod at the moment of fixation in the groove of the hinge of the fixed bracket.  6. The device according to p. 1, characterized in that the thrust is made in the form of a rod with a piston placed in a cylinder placed on a hinge of a fixed bracket, and the cylinder capacity is divided by a piston into two chambers communicated between each other by a channel in which the locking device is located, for example a plug valve with a jet.  7. The device according to p. 6, characterized in that the chambers in the cylinder, separated by a piston, are connected to the supply line of the working fluid, for example, oil, connected to the supply system of the working fluid, for example to a high pressure oil system or to a compressor of an automobile engine controlled by for example, through a distributor.

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