JPS5911929A - Seat lifter - Google Patents

Abstract

PURPOSE:To eliminate generation of any play of seat frame, and improve the productivity and repair performance with a simple constitution by accommodating a driving part into the inside space of a seat cushion frame and removing elliptical holes in the connection part on each member. CONSTITUTION:A front 1ink 25 and a rear 1ink 27 are pivotally installed between the right and left slide rails 21 and the inside surface of a seat cushion frame 32, and thus a parallel link mechanism is constituted. An elctrically driven motor 51 is installed inside the cushion frame 32, and a worm gear apparatus 44 is connected to revolve a driving shaft 37 in deceleration. Each of center gears 34 installed at both edges of the driving shaft 37 is geared with a sector gear 33 equipped with the front link 25.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a notebook link that is driven by an electric motor to fully adjust the vertical position of a vehicle seat.

As a conventional 7 = drifter of this building, for example,
There is a device as described in Japanese Patent No. 7-13570, which will be briefly explained with reference to FIGS. 1 and 2.

Brackets 2.2 and 6゜6 are fixed to the front and rear parts of the upper rails 1a, 1a, and 1a of the right slide rails 1, 1, respectively, which are fixed to the heavy duty floor (not shown). A connecting arm 4 is rotatably supported between the GLAKENs 1-2 and 2.

There are 5°5 holes on both ends of this connecting arm 40!
11h1 is fixed, and the pin 7.7 provided at the other end of the lit links 5, 5 is inserted into the long hole 3 of the L spears 8, 8;
The front part of the isolation frame is fixed to these L spears 8, 8, and the rear part is pivotally connected to the bracket 6.6.

On the other hand, power like an electric motor? J! , 9 are integrated, and the extension r'rl of the bracket 2 is
s 2; + , 2 +)
The lower ends of the swinging ricks 12, 12, which are fixed to the connecting arm 4 at one end, are connected to the worm gear device 10 by a pin 16 that is inserted into an elongated hole (not shown), and further, The JJ type lever 88 is always moved upward by the torsion bar 14 via the lift links 5, 5.
At the same time, the connecting arm 4 is suppressed downward (・E) to prevent sagging from occurring at each connecting portion.

And power source 91! ! When r/: moves, the worm gear assembly flVf 10 moves in the front and back direction along the threaded rod 11, and the swinging rick 12.12 swings and connects A-], 4 times! l! II. By rotating the lift trucks 5, 5 as the four-metal fulcrum and raising or lowering the L spear 8°8 to -, the front part of the seat cushion frame (not shown) is raised or lowered. It looks like this.

However, such a conventional drifter
As clearly shown in the figure, due to its structure, the driving parts such as the power source 9 and the worm gear device 10 have to be located below the slide rail 1, so a space is required for this on one side under the seat, and the floor It cannot be used if additional issues are added directly to the sheet, and even if a space is provided below with a slide rail, the space cannot be used to its full effect, and if there is a protrusion on the floor due to a cross member, etc., it cannot be used. There have been problems such as interference with the drive unit and restriction of the sliding range of the seat.

In addition, such conventional seat lifters have a large number of parts, are complex in structure, and require biasing means such as torsion bars to prevent looseness that occurs in each part, which requires additional man-hours for installation. Therefore, productivity was low, and disassembly and assembly for repairs was difficult.

Second invention (To solve this kind of problem)
There is a small cage, and all of the driving parts are housed in the inner space of the seat frame and protrude downward.

(・And there is no need for long holes in the connecting parts of each member ((
To provide a foot lifter which reduces the occurrence of twisting and backlash, has a simple structure, and has good productivity and repairability.

Therefore, the seat litter according to the present invention uses a parallel link mechanism in which a cross i-rick and a rear rick are respectively pivotally connected between the floor or the left and right slide rails and the front and rear inside surface of the seat cushion rule l. In addition to moving the rail completely up and down, the 7L motor and the gear device f that decelerates its rotation.
1 - The worm gear is fixedly installed inside the frame, and the worm gear is used to directly rotate the 1 drive/shaft, and the sector gears are fixed to both ends of the 1 drive shaft. The installed sector gear and 'i'y'', total 1.-, Ml deaf・14
1 to drive the row linkage (L/, -Moto)
Ru.

Hereinafter, the present invention will be described in detail with reference to FIG. 6 and subsequent figures in the attached drawings.

First, as shown in the perspective view of FIG. 6 and the exploded perspective view of FIG. The lower ends of front links 25.25 are pivotally connected to the brackets 22 and 22 by shafts 24 and 24, and the lower ends of rear links 27 and 27 are pivotally connected to the bearing brackets 2 and 2 by shafts 26. , each upper end of which is connected to the shaft 2
8,29° snap ring 60. It is pivotally connected to the inner surface of the seat cushion frame 62 by an E-ring 61 and the like to form a parallel link mechanism.

Each front link 25.25 has sector gears 33, 33'z fixed thereto whose two ends are pivotally connected to a shaft 28.28, respectively.

On the other hand, the center gear 34 meshing with this sector 53.33
．． 3/In integrally fixed side shaft 35.35
As clearly shown in FIG. 4, the serrations 352 are formed and inserted into the connecting pipe filter 6 having serration grooves 36 a fc formed at both ends and spline-fitted to form a drive/pipe 67 .

In addition, the outer end of the above Zai I 7 Yanoto 35.35 is /
- Pivotally supported by bearing pieces 69 fixed to the left and right outer surfaces of the Toxo/Yon frame 62 with two bolts 68, 1']
Extraction is stopped by link 40, and it is organized as a whole.
ing.

Next, as best shown in FIG.
A worm wheel 46 is fixed to the outer periphery of the tube 41'taR1, and the tube 41'taR1 passes through the through hole 45a of the base 45 of the gear box 44 and the through hole 46ak of the lid 46.

Further, a transmission/yaft 47 orthogonal to the connecting pipe 46 is provided to pass through the through holes 451) and 45C of the base 45, and a worm gear 48 that meshes with the worm wheel 43 is provided at ζ13 in the base 45 of the transmission/yaft 47. A worm wheel filter 9 is fixed to the outer part. Then, with the worm wheel 46 and the worm gear 48 engaged, the lid body 46 is screwed onto the base 45 with three screws 50 to assemble the first gear box 44.

On the other hand, a worm gear 56 is formed on the rotating shaft 52 of the electric motor 510 that is a power source, and its tip is supported in a through hole 54a of a second gear box 54 that is integrated with the electric motor 51, and is connected to another through hole 54b. The tip of the transmission shaft 47 is pivotally supported, and the second gear box 54 is connected to the first gear box 44 with the worm wheel 49 engaged with the worm gear 5B. 56.
56, and then bolts 58 are attached to the bracket 57 fixed to the seat cushion frame 62.
．． 58.

This first. By the second gearbox 44.54, 2
It constitutes a step reduction worm gear device.

When an operation switch (not shown) is turned on in FIG. 6, the electric motor 51 starts and its rotating shaft 52 rotates, causing the worm 1, the worm gear 5 of the gear device, and the worm wheel to rotate. 49° worm gear 48. The (1 drive/yaft 67 rotates at a reduced speed through the worm wheel 4.

, 1 movement/Due to the rotation of the shaft 37, the front link 25 rotates around the shaft 24 through the center gear 64° and the sector gear 6, and the rear link 27 also rotates around the shaft 26.
Since the snake and the tongue rotate in the same direction, the seat shoes/yono (
(not shown)
2 rise or fall substantially in parallel.

Note that since the worm gear 48 is not rotated in the opposite direction by the worm wheel 46, its vertical position is maintained even if the load of the handle member is applied during sorting.

In addition, each rotation ratio (,
11. The worm gear in the gear V box 44.
20 to 1/40, and the overall reduction ratio is 1/400 to 1
/1600, and even if a small electric motor with low torque is used, sufficient driving torque can be obtained.

When assembling the drive section, from the state shown in FIG.
recessed part 32a' (through the site shirt 1-35.35
and fix the bearing pieces 39.39 to the left and right outer surfaces of the seat cushion frame 68 with the bolts 38.38, and the second
Attach the gear box 54 to the bracket 5 with bolts 58, 58.
7, the sector gear 6 is engaged with the center gear 4, and the upper end of the front link 25 is pivotally connected to the left and right inner surfaces of the seat cushion frame 62 by the shaft 28 and the snap link 60.

By reversing this order, decomposition can also be carried out very easily.

Furthermore, the first. If repairs or adjustments in the second gearbox 44, 54 are necessary, slide the Zyto/Yaftoro 5 to the connecting pipe 6 with the bolts 58° still attached.
By removing the 6, you can take out the bagyahosokusu 44.54.

In such a drive mechanism section, the rotating shaft 52 of the electric motor 51, the transmission shaft 47, the transmission shaft 47, and the drive shaft 67 are connected by a worm gear 1, and the connection pipe 66 of the drive shaft 67 is connected with a spline. Side shaft 65 and front link 25 to be connected
The front link 25, the rear link 27, and the seat cushion frame 62 are axially connected without using long holes. No biasing member or the like is required.

Next, the most significant effects of this invention will be explained with reference to FIG. 1. Electric motor 51 that constitutes the entire drive mechanism section
The gear boxes 44, 45, which are worm gear devices, etc. are all located within the seat cushion frame 32 above the slide rail 21. Therefore, even if the cross member 60 is present on the vehicle floor 59, the seat 61
When sliding, the sliding amount can be freely set without interfering with the cross member 6o of the 1 drive mechanism section.

Furthermore, the space S on the upper surface of the vehicle floor below the seat cushion frame 62 can be effectively utilized by providing a space for electronic components, a jack handle, etc., and a storage space for small items.

In the above embodiment, a two-stage reduction gear is used as the worm gear device, but it may be one stage or multiple stages of three or more stages.

Further, a sector gear may be fixed to the rear link instead of the front link, and the parallel link mechanism may be driven by meshing with a center gear fixed to the drive shaft.

Further, the seat lifter according to the present invention can be applied to cases where the seat can be lifted directly onto the floor without using a slide rail.

As explained above, the sheet-tri-no-kuha according to the present invention,
! 'J1. Since the drive mechanism is all housed within the 7-tokunonyon frame, the drive mechanism does not interfere with the floor cross member, etc. when sliding the Y-1-, and the seat The space between the cushion, floor and surface can be used effectively. Also,
It can also be used when directly attached to the Seatora floor.

Furthermore, since the drive mechanism and the parallel link mechanism are axially coupled without using gear coupling or slotted holes, each type of binding material is unnecessary, and the structure is simple and assembly and disassembly are easy, improving productivity and repair. The correction will be better.

In particular, as shown in the example, the drive shaft is composed of two side shafts with fixed center gears, and a connecting pipe with splines fitted to both ends of the side shaft and a worm wheel fixed in the middle. If you configure it by
Assembly and disassembly become easier.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view showing a conventional power seat adjustment device, and FIG. 2 is a sectional view taken approximately along line A-A in FIG. 1. 6 is an overall torso view showing an embodiment of the present invention, FIG. 4 is an exploded perspective view of the same, FIG. 5 is an exploded perspective view showing only the drive mechanism, and FIG. , is also an explanatory side view thereof. 21...Slide rail 25...Front link 2
7...Rear link 62...Seat cushion frame 66...Sector gear 64...Center gear 65...Side shaft 66・Connection pipe 67・
... Drive shaft 44 ... First gear box (worm gear device) 5
1... Electric motor 54... Second gear box (worm gear device) 5
9...Floor

Claims (1)

[Scope of Claims] 1. A notebook lifter that uses an electric motor to adjust the position of a vehicle seat in the 1-bottom blade direction by means of a drive 7. One end of the front link and O/rear link, whose lower end is pivotally connected, is respectively pivotally connected to the inner surface of the notebook frame to form a 15V row link mechanism, and the upper end of the front link or rear link is (IQl)
l 'c A sector gear having a rotational center is fixed to the front link or the rear link, and the "11!"
A worm gear device that fully reduces the rotation of the electric motor and the electric mower and rotates the drive motor fully is fixedly installed inside the seat shoe/yaw/route.
'lL, fixedly installed on both ends of the drive note lifter /1-Hinotagi N- to the said sector carrier 4116
Total λ) 1 tore. 1,') 6CI-1 Kokoto Kei 1ko J1
Atsushi/- Drifter. 2. Claim No. 2, in which the drive shaft consists of two side shafts each having a fixed center gear, and a connecting pipe having spline fittings to both ends of the sight shaft and a worm wheel fixed to the middle part. The seat lifter described in item 1.