JP4296136B2 - Vehicle door opening and closing device - Google Patents

Description

  The present invention relates to a door opening and closing device for a vehicle in which a drive pulley and an idle pulley that contacts the drive pulley are improved.

A sliding door device as a vehicle door opening and closing device includes a driving unit disposed on a step panel of a vehicle, a driving pulley driven by the driving unit, a driven pulley disposed before and after the step panel, a driving pulley and a driven pulley It has a basic configuration having a toothed belt wound around a pulley and a sliding door coupled to the toothed belt via a bracket.
To open and close the sliding door, the drive pulley is driven by the drive unit, and the toothed belt is fed between the pair of driven pulleys. This toothed belt feed allows the sliding door to open and close.

FIG. 8 shows a cross section of the conventional example shown in FIG. 3 of Japanese Patent Laid-Open No. 10-266697. A conventional driving pulley 1 is composed of a small diameter portion 2 and a large diameter portion 3, and a toothed belt 5 is wound between the small diameter portion 2 and the driven pulley 4. The rotating shaft of the driven pulley 4 is coupled to the output shaft of a motor (M) as a driving unit.
A main toothed belt 6 is wound around the large-diameter portion 3 of the drive pulley 1. The drive pulley 1 is rotatably supported by a step panel or a bracket 7 fixed to the step panel. The main toothed belt 6 is in contact with the idle pulley 8 and adjusts its tension to prevent tooth skipping of the main toothed belt 6 with respect to the drive pulley.

  The idle pulley 8 is arranged so as to be close to the drive pulley 1 and whose rotation shaft is offset in the vehicle width direction. Thereby, the running direction and tension of the main toothed belt 6 are controlled.

Japanese Patent Laid-Open No. 10-266697

In the conventional example shown in FIG. 8, since the outer peripheral surface of the idle pulley 8 and the outer peripheral surface of the small diameter portion 2 are close to each other, the idle pulley 8 cannot be provided with a portion for preventing the main toothed belt 6 from hanging down. A shoe 9 made of synthetic resin is attached to the bracket 7, and the side edge of the main toothed belt 6 is guided downstream of the idle pulley 8.
The installation of the shoe 9 that maintains the posture of the toothed belt contributes to preventing the main toothed belt 6 from drooping in the direction of the bracket 7, however, it generates a squeak noise and the operating force during manual operation of the sliding door. In addition, there is a problem that the durability of the toothed belt is reduced.

  Therefore, an object of the present invention is to solve the problems of the prior art described above.

  In order to solve the above-described problems, the present invention provides a configuration that enables the use of an idle pulley having a cylindrical portion and flange portions on both sides of the cylindrical portion. That is, a configuration is provided in which a driving pulley consisting only of a large diameter portion is used instead of a two-stage driving pulley consisting of a small diameter portion and a large diameter portion.

  In the present invention, the running direction of the belt is maintained in a stable manner by the idle pulley, there is little belt deflection, the belt does not contact the step panel, and the sliding door can be opened and closed more smoothly.

According to the present invention, a drive unit disposed on a step panel of a vehicle, a drive pulley driven by the drive unit, a driven pulley disposed on the front and rear portions of the step panel, and a drive pulley and a driven pulley are wound around. In a vehicle door opening and closing device in which the belt is tensioned by an idle pulley and the belt is linked to a door, the idle pulley is in contact with the drive pulley via the belt and the belt is in sliding contact with the belt A vehicle having a cylindrical portion and a pair of flange portions formed on both sides of the cylindrical portion so as to partially overlap both side surfaces of the drive pulley and having an inner tapered surface in contact with a side edge of the belt A door opening and closing device is provided.

  Preferably, the output shaft of the drive unit is coupled to the rotation shaft of the drive pulley. More preferably, the drive pulley is in contact with at least one idle pulley via a belt, the rotation centers of both pulleys are offset from each other in the vehicle width direction, the idle pulley has flange portions on both sides of the cylindrical portion, The portion has an inner tapered surface.

  According to the present invention, since it becomes possible to use an idle pulley with a flange portion, it is possible to prevent the belt from drooping, to eliminate a squeak noise, to reduce the operating force, and to improve the durability of the belt. Is resolved.

1 is an example of the present invention, and a sliding door device 10 shown in FIG. 1 includes an electric motor 11 as a drive source, a known drive unit 13 including a reduction gear structure, a clutch mechanism, and an output shaft 21, and a drive unit 13. Drive pulley 12, driven pulleys 15 and 15 disposed at the front and rear ends of the vehicle step panel 14, toothed belt 16 wound around the drive pulley 12 and driven pulleys 15 and 15, A roller unit 20 having a bracket 19 fixed to the belt 16 and idle pulleys 17 and 18 for controlling the tension and the running path of the toothed belt 16, and the bracket 19 slidably supports the sliding door with respect to the vehicle door. Attached to. The toothed belt 16 meshes with the drive pulley 12, whereby the driving force generated by the operation of the drive unit 13 is transmitted from the drive pulley 12 to the toothed belt 16.
When the motor 11 is driven to operate the drive unit 13, the drive pulley 12 rotates via the output shaft 21, and the rotation of the drive pulley 12 circulates the toothed belt 16 between the driven pulleys 15 and 15, and the sliding door. 20 is moved in the front-rear direction. Thus, the door can be opened and closed. Of course, the door can be opened and closed manually.

As will be described later in detail, the driven pulleys 15 and 15 and the idle pulley 18 include a cylindrical portion and flange portions at both ends thereof. The toothed belt 16 is in sliding contact with the cylindrical portion, and the runout of the toothed belt 16 is caused by the flange portion. Is suppressed.
Parts constituting the sliding door device 10 are fixed or supported to the step panel 14 directly or via a bracket.

  Please refer to FIG. 5 and FIG. The drive pulley 12 is fixed to the output shaft 21 of the drive unit 13 so as to rotate integrally, and is rotatably supported by a step panel 14 and a bracket 22 fixed to the step panel 14. In other words, the output shaft 21 of the drive unit 13 also serves as the rotation shaft 21a of the drive pulley 12, whereby the output shaft 21 of the drive unit 13 and the rotation shaft 21a of the drive pulley 12 are directly coupled ( That is, the small diameter portion 2 and the toothed belt 5 of FIG. 8 are not required). Of course, the same applies to a structure in which the output shaft 21 of the drive unit 13 and the rotary shaft 21a of the drive pulley 12 are separated and directly coupled by a joint or the like. The drive unit 13 is disposed on the side of the step panel 14 opposite to the side where the drive pulley 12 is disposed.

As shown in FIG. 7, the idle pulley 17 has a cylindrical portion 23 and flange portions 24 at both upper and lower ends (upper and lower portions in FIG. 7) of the cylindrical portion 23, and a tapered surface 25 is provided inside the flange portion 24. It is done. A rotating shaft 26 of the idle pulley 17 is rotatably supported by the step panel 14 and the bracket 22.
The flange portion 24 having the tapered surface 25 stabilizes the feeding direction of the toothed belt 16 fed from the drive pulley 12 and ensures a preferable posture of the toothed belt 16.
Such an arrangement of the idle pulley 17 can be realized by a configuration in which the rotating shaft 21a of the driving pulley 12 arranged on the lower side of the step panel 14 is directly coupled to the output shaft 21 of the driving unit 13 arranged on the upper side of the step panel 14. Become. That is, it becomes possible by extending a part of the outer peripheral edge of the pair of flange portions 24 to both side surfaces of the drive pulley 12 as apparent from FIG.

  In the example of the idle pulley 17 shown in FIG. 6, both side edges of the toothed belt 16 are brought into contact with the flange portion 24 of the idle pulley 17, but as shown in FIG. A plurality of protrusions 27 are arranged on the surface of the flange portion 24 which is a joint portion and in contact with the side edge of the toothed belt 16 so as to be continuous. The protrusion 27 becomes a point or line contact with the side edge of the toothed belt 16 and can reduce the noise.

It is a perspective view of a vehicle door opening and closing device of an example of the present invention. It is an expansion perspective view of the arrow A part of FIG. It is an expansion perspective view of the arrow B part of FIG. It is an expansion perspective view of the arrow C part of FIG. It is a fragmentary perspective view of a drive pulley part. It is sectional drawing of a drive pulley part. It is sectional drawing of another example of a drive pulley. It is sectional drawing which shows the drive pulley part of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Sliding door apparatus 11 Motor 12 Drive pulley 13 Drive part 14 Step panel 15 Driven pulley 16 Toothed belt 17 Idle pulley 18 Idle pulley 19 Bracket 20 Slide door 21 Output shaft 21a, 26 Rotating shaft 22 Bracket 23 Cylindrical part 24 Flange part 25 Tapered surface 27 Projection

Claims (4)

A driving unit disposed on the step panel of the vehicle, a driving pulley driven by the driving unit, a driven pulley disposed on the front and rear portions of the step panel, and a belt wound around the driving pulley and the driven pulley. In the vehicle door opening and closing device in which the belt is tensioned by the idle pulley and the belt is linked to the door,
The idle pulley is
A cylindrical portion that is in contact with the drive pulley via the belt and is in sliding contact with the belt;
A pair of flange portions having inner tapered surfaces which are formed on both sides of the cylindrical portion so as to partially overlap both side surfaces of the drive pulley and are in contact with the side edges of the belt;
A vehicle door opening and closing device characterized by comprising:   The vehicle door opening and closing device according to claim 1, wherein an output shaft of the drive unit is coupled to a rotation shaft of the drive pulley. The vehicle door opening and closing device according to claim 1, wherein the rotation centers of the drive pulley and the idle pulley are offset from each other in the vehicle width direction. Idle pulleys vehicle door opening and closing device according to claim 1, further comprising a projection in contact with the side edges of the belt.

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