JPS643626Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a wheel mounting attitude adjustment device that can tilt a wheel in accordance with a hub of a vehicle that is mounted with a slight inclination.

To attach a wheel to the hub bolt of a vehicle being carried on a conveyor on a vehicle assembly line, a worker takes the wheel out of the tire chute, locates the bolt hole, attaches it to the hub bolt, and then tightens the hub nut with a pneumatic tool. Tightening is often done manually, which is an obstacle to improving production.

When attempting to automate the installation of such wheels, the wheel hub has a toe-in angle and a camber angle and is tilted three-dimensionally, so it is necessary to tilt the wheel accordingly. However, constructing a device that tilts the wheels three-dimensionally using a commonly known mechanism as described above inevitably results in a complicated structure, which is undesirable in terms of maintenance and cost, and is not suitable for automation. Not.

The present invention provides a device with a simple structure that can three-dimensionally adjust the attitude of a wheel to match the hub of a vehicle.
The aim is to increase the automation of wheel installation work.

The gist of the present invention to achieve the above purpose is to erect at least three pillars in the front and rear, fit slide guides into these pillars so that they can move up and down, and drive the front and rear slide guides using separate drive mechanisms. While enabling vertical movement, the front and rear parts of the mounting base are slidably connected to the slide guide via horizontal pins that are perpendicular to the front-rear direction, and the holes in which either the front or rear pins fit are lengthened. A swivel base is installed in the mount so that it can be driven to rotate around an axis perpendicular to the mount, and the wheel is held on the top of the swivel base with the center axis aligned in a direction perpendicular to the center axis of the swivel base. The present invention resides in a wheel mounting attitude adjusting device characterized in that:

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the wheel mounting attitude adjusting device according to the present invention will be described in detail based on embodiments shown in the drawings.

FIG. 1 shows a cross section along the front-rear direction of a wheel attachment attitude adjusting device according to an embodiment, FIG. 2 shows a plane thereof, and FIG. 3 shows a right half cross section. In addition, in FIG. 1, all the members are shown on one side, and some of the members are different from FIGS. 2 and 3 in positional relationship, shape, etc.

The wheel mounting attitude adjustment device is a part of the automatic wheel mounting device installed on the side of the conveyance line of the vehicle. A track base 1 has a slide base 2 mounted on the track base 1 so as to be movable in the direction perpendicular to the conveyance line (back and forth direction: x-axis direction). A left-right slide base 3 is mounted so as to be movable by driving in a direction parallel to the line (left-right direction: y-axis direction). Reference numerals 4 and 5 designate drive mechanisms for the slide bases 2 and 3, each consisting of a ball screw mechanism, a motor, and the like.

A wheel mounting attitude adjusting device according to an embodiment of the present invention is assembled on the left-right sliding base 3. On the slide base 3, two columns 6 are installed perpendicularly to the slide base 3 at the front thereof, and at the rear thereof, the two columns 6 are positioned at the vertices of an isosceles triangle with the two columns 6 as the bases. One pillar 7 is vertically installed on the slide base 3, and the upper part of each pillar is supported by pillar supports 8 and 9. Each column 6, 7 has a cylindrical slide guide 1.
0 and 11 are fitted so that they can move up and down. A ball screw shaft 1 that is perpendicular to the slide base 3 (that is, parallel to the above-mentioned pillars 6) is installed between the two front pillars 6.
2 is rotatably supported at its lower end via a bearing 13. A ball nut 14 is attached to the ball screw shaft 12, and the ball nut 14 and the slide guide 10 on the support column 6 are connected by an arm 15. Ball screw shaft 12
A sprocket 16 is integrally attached to the lower part of the sprocket. A front drive motor 17 is installed facing downward on the slide base 3, and a sprocket 18 is integrally attached to its drive shaft, and a chain 19 is connected to the sprocket 18 and the sprocket 16. . Therefore, by driving the front drive motor 17, the sprocket 18,
The ball screw shaft 12 is rotated via the chain 19 and the sprocket 16, and the ball nut 14 is connected to the slide guide 10 and restrained from rotating, so it moves up and down along the ball screw shaft 12, and the ball nut 14 and the arm rotate together. An integral slide guide 10 is moved up and down along the column 6 via the support 15. On the other hand, on the rear side of the rear column 7, a ball screw shaft 20 perpendicular to the slide base 3 (that is, parallel to the column 7) is rotatably supported at its lower end via a bearing 21. A ball nut 22 is attached to this ball screw shaft 20.
is attached, and the ball nut 22 and the slide guide 11 on the support column 7 are integrally connected. A sprocket 23 is integrally attached to the lower part of the ball screw shaft 20. A rear drive motor 24 is installed facing downward on the slide base 3, and a sprocket 25 is integrally attached to its drive shaft, and a chain 26 is connected to the sprocket 25 and the sprocket 23. Therefore, by driving the rear drive motor 24, the ball screw shaft 20 is rotated via the sprocket 25, chain 26, and sprocket 23.
Since the ball nut 22 is connected to the slide guide 11 and its rotation is restricted, the ball screw shaft 20
The ball nut 22 moves up and down along the
A slide guide 11 integrated with the support column 7 is moved up and down along the support column 7. Front and rear slide guides 1
0 and 11 have pins 27 and 28 protruding horizontally in the left-right direction. On the other hand, reference numeral 29 denotes a mounting base, in which notches are formed to match the pillars 6 and 7, and bearings 30 and 31 are respectively provided between the notches. Pins 27 and 28 protruding from the slide guides 10 and 11, respectively, are rotatably supported.
In other words, the slide guides 10 and 11 and the mounting base 29
are connected (slip joint) via pins 27 and 28. Furthermore, the hole 31a of the bearing 31 at the rear of the mounting base 29 that supports the pin 28 of the rear slide guide 11 is an elongated hole in the front-rear direction. When the front and rear drive motors 17, 24 are driven, the slide guides 10, 11 are moved up and down through the driving force transmission path as described above, and the mounting base 29 is also moved in the up and down direction (z axial direction). Here, by adjusting the amount of rotation of the front and rear drive motors 17, 24 and creating a difference in height between the front and rear ball nuts 14, 20 and the front and rear slide guides 10, 11,
The mounting base 29 can be tilted back and forth. If the mounting base 29 is tilted, the position of the bearing on the mounting base 29 will shift, but as mentioned above, the rear bearing 31
Since the hole 31a is a long hole, the deviation is absorbed here. In this embodiment, pins 27 and 28 are provided on the slide guides 10 and 11, and bearings 30 and 3 that rotatably hold the pins are provided on the mounting base 29.
1, but conversely, a pin may be provided on the mounting base 29 side, and a bearing that rotatably supports the pin may be provided on the slide guides 10 and 11 side.
Note that the inclination of the mounting base 29 (the tilt of the mounting base 29 relative to the vertical line)
The toe-in angle is determined by the angle formed by the perpendicular line 9). An outer cylinder 32 is installed perpendicularly to the mounting base 29 on the mounting base 29, and a swivel base (inner cylinder) 33 is rotatably supported concentrically inside the outer cylinder 32 via a bearing 34. On this swivel base 33, a mounting device 36 includes a gripping mechanism for gripping the wheel 35, a moving mechanism for moving the gripping mechanism back and forth, a nut runner for tightening a nut onto a hub bolt, etc.
is equipped with. A sprocket 37 is attached to the lower part of the rotating base 33, and a sprocket 39 is attached to the drive shaft of a rotating motor 38 attached to the mounting base 29.
A chain 40 is stretched between the sprocket 9 and the sprocket 37. Therefore, the swing drive motor 38
By driving the sprocket 39, chain 4
0. The swivel base 33 is rotated about an axis perpendicular to the mounting base 29 via the sprocket 37, and a camber angle is set by this rotation.

Next, a description will be given of the wheel attitude adjustment effect of the wheel attachment attitude adjustment device having the above configuration.

In FIG. 1, 41 is a hub of an axle of a vehicle on a conveyance line, and 42 is a hub bolt thereof. The hub 41 is slightly inclined by a camber angle and a toe-in angle.

The wheel 35 is mounted to the mounting device 36 in the automatic wheel mounting device so that the bolt hole position is the same as the hub bolt 42 position.

By rotating the ball screw shafts 12, 20 driven by the front and rear drive motors 17, 24, the mounting base 29 is moved up and down together with the slide guides 10, 11, and the position of the wheel 35 held by the mounting device 36 relative to the hub 41 is determined.

Since the hub 41 has a camber angle and a toe-in angle, it is necessary to adjust the attitude of the wheel 35 to the camber angle and toe-in angle. Therefore, by changing the amount of rotation of the front and rear drive motors 17 and 24 that are driven independently, a difference in height is created between the front and rear ball nuts 14 and 22 as well as the front and rear slide guides 10 and 11.
Tilt the mounting base 29. The mount 29 is tilted so that the angle of the center axis of the swivel base 33 on the mount 29 with respect to the vertical matches the camber angle. Further, the swivel table 33 is swiveled by the driving of the swiveling motor 38, and its swivel angle is matched with the camber angle. As described above, by tilting and turning the swivel base 33, the wheels 35 held by the mounting device 36 are given a camber angle and a toe-in angle.

Thereafter, when the mounting device 36 is moved toward the hub 41, the bolt hole of the wheel 35 matches the hub bolt 42, and the wheel 35 is mounted on the hub 41. Thereafter, the nut runner of the mounting device 36 tightens the nut on the hub bolt 42, and the mounting of the wheel 35 is completed.

Of course, the series of operations described above are performed automatically in conjunction with position detection by the position detector.

In the above embodiment, the pin 28 of the rear slide guide 11 is held by the long hole 31a, but the pin 28 of the front slide guide 10 is held by the long hole 31a.
7 may be held by a long hole. Further, the number of slide guides is not limited to two in the front and one in the rear, but may be at least three in total in the front and rear. Furthermore, in this embodiment, a sprocket and a chain are used as the driving force transmission mechanism, but other means such as a belt pulley, a timing belt, a pulley and a belt, etc. can also be used. As a driving force transmission mechanism for moving the slide guides 10 and 11 up and down, it is also possible to use a mechanism other than a ball screw mechanism.

As described above in detail based on one embodiment, according to the wheel mounting attitude adjustment device according to the present invention, the mechanism for vertically moving the mounting base on which the swivel base for mounting the wheels can also be used as a mechanism for tilting the mounting base. Since it is used, the structure is simple and it is advantageous in terms of maintenance and cost. Moreover, since the structure is simplified, automation becomes easier.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of an embodiment of the present invention, FIG. 2 is a plan view of the embodiment, and FIG. 3 is a right half sectional view. In the drawing, 1 is a track base, 2 is a longitudinal slide base, 3 is a horizontal slide base, 6 and 7 are columns, 10 and 11 are slide guides, 12 and 20 are ball screw shafts, 14 and 22 are ball nuts, 2
7 and 28 are pins, 29 is a mounting base, 30 and 31 are bearings, 31a is a long hole in the bearing 31, 33 is a swivel base, 3
5 is a wheel, 38 is a turning motor, and 41 is a hub.

Claims (1)

[Scope of utility model registration request] At least three pillars are erected in the front and rear, and a slide guide is fitted into each of these pillars so that they can move vertically.The front and rear slide guides can be driven vertically by separate drive mechanisms, while the The front and rear portions are connected to the slide guide via a horizontal pin that is perpendicular to the front-rear direction, and the hole into which either the front or rear pin fits is an elongated hole, and the mounting base is attached to the mounting base. A wheel characterized in that a swivel base is mounted so as to be able to rotate around an axis perpendicular to the swivel base, and the wheel is held on the top of the swivel base with the center axis aligned in a direction perpendicular to the center axis of the swivel base. Mounting posture adjustment device.