JPH051568U - Slide device - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the assembly work of parts while maintaining the sealing performance and soundproofing performance. [Structure] Feed screw shaft 11, nut 13 engaged with feed screw shaft 11 so as to be able to move forward and backward, nut holder 16 holding nut 13, nut 13 and nut holder 16
In the slide device 10 including the dust seal 24 interposed between the side wall portion 2 and the dust seal 24,
5, 26 and the bottom wall portion 27 are integrally formed, and the shaft insertion holes 28, 29 are positioned so as to be arranged concentrically with the feed screw shaft insertion hole 14 of the nut 13.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a slide device, and particularly to a slide power seat device effective for use in a vehicle.

[0002]

[Prior Art]

 A slide power seat device installed in an automobile vehicle can drive the seat to a designated position by driving a motor. When moving this sheet, a slide device is used in which the feed screw shaft is rotated by the rotation shaft of the motor.

As a conventional slide device of this type, there is one shown in FIG. That is, the slide device 40 includes a feed screw shaft 41 connected to the rotary shaft of the motor and arranged along the guide rail, and a nut 42 reciprocally meshed with the feed screw shaft 41. A nut holder 43, which is formed in a substantially box shape and holds the nut 42 in a non-rotating state, and a pair of dust seals 44, 44 are provided, and a mounting bolt 45 fixed to the bottom of the nut holder 43 is fixed to the vehicle body. It is supposed to be done. Then, as the feed screw shaft 41 rotates, the nut 42 relatively moves on the feed screw shaft 41, thereby moving the seat along the guide rail.

[0004]

[Problems to be solved by the device]

 However, the slide device shown in FIG. 4 has the following problems.

Since the pair of dust seals 44, 44 for preventing the entry of foreign matter into the meshing portion of the feed screw shaft 41 and the nut 42 are formed separately from each other, the workability of assembling is poor.

The dust seal 44 has an annular protrusion 44a bulgingly formed and fitted into the shaft insertion hole 43a of the nut holder 43. Therefore, when the feed screw shaft 41 bends when the slide device 40 is locked, the protrusion is formed. 44a is sandwiched between the feed screw shaft 41 and the nut holder 43 and is damaged, and the sealing performance is deteriorated.

Since it is necessary to provide a clearance 46 between the nut 42 and the nut holder 43, the shaft center of the nut 42 and the shaft center of the feed screw shaft 41 may not coincide with each other at the time of assembly. The work for arranging 42 and the feed screw shaft 41 concentrically is troublesome.

When the feed screw shaft 41 is reversed, the nut 42 collides with the mounting bolt 45 and an abnormal noise is generated.

An object of the present invention is to provide a slide device capable of improving workability while maintaining sealing performance and soundproof performance.

[0010]

[Means for Solving the Problems]

 A slide device according to the present invention has a feed screw shaft that is driven to rotate, a nut that is meshed with the feed screw shaft so as to be able to move forward and backward, and is formed in a substantially box shape and has an opening formed in one surface, and the two faces face each other. Slides each having a feed screw shaft insertion hole on the side wall and equipped with a nut holder that holds the nut on the feed screw shaft in a housed state and a dust seal inserted between the nut and the nut holder. In the device, the dust seal is a pair of side wall parts that fills the gaps between the end faces of the nut holder shaft insertion holes and the nut feed screws, and the gaps between the bottom face of the nut holder and the bottom face of the nut. It has a bottom wall part that fills the inside of the nut, and both side wall parts are connected to both ends of the bottom wall part and are integrated, and both side wall parts have a shaft insertion hole of approximately the same diameter as the nut feed screw shaft insertion hole. Is established Both side wall is characterized by being concentrically disposed to the axis of the shaft insertion hole coincides with the axis of the feed screw shaft insertion hole of the nut.

[0011]

[Action]

 According to the above-mentioned means, each side wall portion and bottom wall portion of the dust seal are integrally formed, and when the dust seal and the nut are housed in the nut holder, the dust seal and the shaft insertion hole of the nut are concentric. Since it will be placed in the center, it is not necessary to align the shaft center, and the assembly work becomes easy.

Further, since the bottom wall of the dust seal is formed so as to fill the gap between the nut and the nut holder, it functions as a damper. Therefore, it is possible to prevent the collision noise between the nut and the nut holder from being generated when the feed screw shaft is reversed.

[0013]

【Example】

 FIG. 1 is an exploded perspective view showing a slide device according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view showing its assembled state, and FIG. 3 is a slide power seat device in which the slide device is used. It is a part omitted perspective view.

In the present embodiment, the sliding device according to the present invention is used in a vehicle slide power seat device 1 for sliding a vehicle seat. This power seat device 1 is provided with a pair of left and right guide rails 2 and 2 which are laid in the front-rear direction on a vehicle body (not shown), and slide bars 3 and 3 are provided on both guide rails 2 and 2. Each is slidably installed in the front-rear direction. A sheet (not shown) is placed and installed on both slide bars 3 and 3.

A pair of feed screw shafts 11 and 11 of the slide device 10 are arranged in parallel with both slide bars 3 and 3. One end of both feed screw shafts 11 is connected to the gear boxes 4 and 4, and the other end is It is rotatably supported by bearings 5 and 5. Each gear box 4 and bearing 5 are connected to the slide bar 3 via a bracket 6, respectively. A motor 7 is connected to one of the gear boxes 4, and the output shaft of the motor 7 is inserted into the gear box 4. The other gear box 4 is connected to the rotating shaft of a motor 7 via a torque cable 8. When the motor 7 rotates in the forward and reverse directions, the feed screw shafts 11 and 11 rotate in the forward and reverse directions by the gear mechanism built in the gear boxes 4 and 4, and accordingly, the nut 13 of the slide device 10 moves. The seat mounted on the slide bars 3 and 3 is moved forward and backward along 11 so that the seat can be slid forward and backward.

In this embodiment, a pair of slide devices 10 and 10 are used. The slide device 10 is provided with a feed screw shaft 11 having an external thread 12 engraved on the outer periphery thereof. The feed screw shaft 11 is mounted along the guide rail 2 as described above and is rotationally driven by the motor 7. It is supposed to be done. A nut 13 is meshed with the feed screw shaft 11 so as to reciprocate in the axial direction. The nut 13 is made of resin, and a part (hereinafter, referred to as an upper part) is semicircular, and a lower part is integrally formed in a rectangular parallelepiped shape, and a feed screw shaft insertion hole 14 is formed at a substantially central portion. It is opened so as to extend in the longitudinal direction. A female screw 15 that meshes with the male screw 12 of the feed screw shaft 11 is formed on the inner peripheral surface of the feed screw shaft insertion hole 14.

The nut 13 is held by a nut holder 16. The nut holder 16 is made of a material having mechanical strength such as structural steel, and is integrally formed in a box shape capable of accommodating the nut 13. An opening 17 is opened in the upper part of the nut holder 16 and shaft insertion holes 20 and 21 through which the feed screw shaft 11 can be inserted are formed in a pair of side walls 18 and 19 facing each other. This nut holder 16 is inserted into the bottom wall 22 from the inside toward the outside at a right angle and is fixed to the vehicle body by an attachment bolt 23 fixed by spot welding. By this fixing, the nut 13 is fed. It is designed to prevent rotation with respect to the screw shaft 11.

A dust seal 24 integrally formed by using an elastic material such as rubber or resin is interposed between the nut 13 and the nut holder 16 so as to fill the gap between them. That is, in the dust seal 24, a pair of side wall portions 25 and 26 and a bottom wall portion 27 are integrated by connecting the lower end sides of both side wall portions 25 and 26, and the side wall portions 25 and 26 have a feed screw shaft. Shaft insertion holes 28 and 29 having substantially the same diameter as the insertion hole 14 are formed. The dust seal 24 is set such that the thickness of the side wall portions 25 and 26 and the bottom wall portion 27 fills the gap between the nut 13 and the nut holder 16, and the shaft insertion holes 28 and 29 have the nut 13 that is the dust seal 24. The shaft center of the shaft insertion holes 28 and 29 and the shaft center of the feed screw shaft insertion hole 14 of the nut 13 are positioned so as to be concentric when they are housed in the nut holder 16 via the.

Next, the assembling work of the slide device 10 will be described.

First, the dust seal 24 is inserted from the opening 17 side of the nut holder 16, the bottom wall portion 27 is attached to the bottom portion of the nut holder 16, and the side wall portions 25 and 26 are attached to the side walls 18 and 19, respectively. ..

After that, the nut 13 is inserted from the opening 17 side of the nut holder 16. As a result, the dust seal 24 is press-fitted between the nut 13 and the nut holder 16. At this time, the shaft center of the feed screw shaft insertion hole 14 of the nut 13 and the shaft centers of the shaft insertion holes 28 and 29 of the dust seal 24 are arranged substantially concentrically.

Therefore, next, when the feed screw shaft 11 is inserted into the feed screw shaft insertion hole 14 of the nut 13, the feed screw shaft 11 and the nut 13 are fitted to each other without aligning the axes. Can be engaged.

As described above, according to this embodiment, the dust seal 24 has an integral structure, and the shaft insertion holes 28 and 29 and the feed screw shaft insertion hole 14 of the nut 13 are concentrically arranged. Therefore, it is unnecessary to align the center of the feed screw shaft 11, and the assembling work can be easily performed.

Further, since the dust seal 24 is press-fitted between the nut 13 and the nut holder 16, it is possible to prevent rattling when the feed screw shaft 11 is operated.

Since the diameters of the shaft insertion holes 28 and 29 of the dust seal 24 are substantially the same as the outer diameter of the feed screw shaft 11, good sealing performance can be ensured.

Further, since the bottom wall portion 27 of the dust seal 24 is configured to fill the gap between the lower surface of the nut 13 and the bottom surface of the nut holder 16, when the feed screw shaft 11 is turned upside down, the nut 13 is fixed to the nut holder. It does not collide with 16, and it is possible to prevent metal noise from being generated by the operation of the feed screw shaft 11.

Since the side walls 25 and 26 of the dust seal 24 have no protrusions, it is possible to prevent the dust seal 24 from being bitten by the rotation of the feed screw shaft 11 and to ensure the sealing performance for a long period of time. ..

[0028]

[Effect of the device]

 As described above, according to the present invention, the dust seal has an integrated structure, and the shaft center of the dust seal shaft insertion hole and the nut feed screw shaft insertion hole are configured to coincide with each other. Can be easily assembled.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a slide device according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view showing the assembled state.

FIG. 3 is a partially omitted perspective view showing a slide power seat device in which the slide device is used.

FIG. 4 is a vertical sectional view showing a conventional example.

[Explanation of symbols]

1 ... Slide power seat device, 2 ... Guide rail, 3
... slide bar, 4 ... gear box, 5 ... bearing, 6 ... bracket, 7 ... motor, 8 ... torque cable, 10 ... slide device, 11 ... feed screw shaft, 12 ... male screw, 13 ...
Nut, 14 ... Feed screw shaft insertion hole, 15 ... Female screw, 16
... nut holder, 17 ... opening, 18,19 ... side wall, 2
0, 21 ... Shaft insertion hole, 22 ... Bottom wall, 23 ... Mounting bolt,
24 ... Dust seal, 25, 26 ... Side wall part, 27 ... Bottom wall part, 28, 29 ... Shaft insertion hole.

Claims (1)

[Claims for utility model registration] [Claim 1] A feed screw shaft that is rotationally driven, a nut that is engaged with the feed screw shaft so as to move back and forth, and is formed in a substantially box shape, and an opening is formed on one surface. , The feed screw shaft insertion holes are opened in the opposite side walls, respectively, and the nut holder that holds the nut on the feed screw shaft in the accommodated state and the dust seal inserted between the nut and the nut holder are In the slide device, the dust seal comprises a pair of side wall portions that respectively fill the gaps between the opening end faces of the nut holder shaft insertion holes and both feed screw shaft insertion hole opening end faces of the nut, the bottom face of the nut holder and the bottom face of the nut. It has a bottom wall that fills the gap between the two side walls, and both side walls are connected to both ends of the bottom wall to be integrated, and both sides have the same diameter as the nut feed screw shaft insertion hole. The shaft insertion hole Is set,
A slide device in which both side wall portions are concentrically arranged such that the axis of the shaft insertion hole is aligned with the axis of the feed screw shaft insertion hole of the nut.