JP4010464B2 - 2-track guide system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a two-track guide system having bearing units arranged in parallel, which are moved by a linear motor, the bearing units being connected laterally by a transfer plate.
[0002]
[Prior art]
A guide system is marketed under the name LiMMS (Linear Motor Motion System) from Philips, in which the individual elements consist of a linear motor and a linear bearing. Both are collected in a U-shaped box member. A large number of individual elements of this kind complement each other to form a two-track system, which can be combined with a lateral support. This guide system is provided as an assembly unit so that a plan tailored to the purpose of use can be solved. Therefore, the stability, running accuracy, etc. of the assembled solution are highly dependent on the accuracy of assembly and installation. Therefore, when planning, an error is already introduced by a non-professional user who is trying to make full use of the full capabilities of this type of system, especially when traveling speed, acceleration, There is a risk of troublesome driving accuracy.
[0003]
[Problems to be solved by the invention]
An object of the present invention is to improve the above-described conventional guide system so that the bearing unit / linear motor can be combined without any problem, and in that case, improved running accuracy and stability can be obtained. is there.
[0004]
[Means for Solving the Problems]
For this reason, the present invention comprises a two-track guide system having bearing units arranged in parallel, which are moved by a linear motor, the bearing units being connected laterally by a transfer plate,
A ball joint (10) is provided at a connection point between the transfer plate (2) and the guide carriage (6).
[0005]
【Example】
This and other features relating to optimized stability will now be described using the example shown in the drawings.
The guide system shown in the figure comprises two linear bearing units 1 arranged in parallel to each other and a transfer plate 2 arranged in the lateral direction therebetween. The bearing units 1 are configured approximately equally, but are arranged in a mirror image.
[0006]
The two supporting members 3 having a fixed U-shaped cross-section are opened on the side facing outward (in FIG. 1, the left supporting member is opened on the left and the right supporting member is opened on the right), and on the lower side. A guide rail 4 for guiding the linear bearing is accommodated on the leg. The body of the movable portion 7 of the linear motor located in each of the left and right support members 3 and 3 is composed of a generally L-shaped support adapter 5, and a rotating ball train of known specifications is placed under each support adapter. The inverted U-shaped guide carriage 6 having the above is attached and straddles the guide rail 4. With this arrangement, the play of tilt in the direction of movement of the guide system is reduced. On the support adapter 5, a movable part 7 of a linear motor having a known specification is arranged. The stationary part 8 of the linear motor is attached to the lower surface of the upper leg of the support member 3. This arrangement works particularly effectively. This is because the arm of the insulator between the linear motors 7 and 8 and the center of gravity of the load to be accelerated on the transfer plate 2 is spatially kept as small as possible, and the upright portion of the L-shaped support adapter 5 This is because the motor chamber is protected from dirt, particles and the like by the cover plate 13 hanging from the support material 3. The compact, stable, relatively short and strong side wall of the support 3 gives the entire bearing unit 1 maximum strength and stability during assembly and drive.
[0007]
A support protrusion 9 for the ball joint 10 is provided on the outer surface of the L-shaped support adapter 5 that protrudes outward from the open portion of each support member 3. One ball joint 10 is inserted in the support protrusion, one for the left bearing unit 1 and two for the right bearing unit. The axis of each ball joint extends perpendicular to the plane of movement of the guide system. The inner race of the ball joint 10 is coupled to the mounting angle member 11 of the transfer plate 2 that couples the two bearing units 1 laterally with respect to the moving direction.
[0008]
The mounting angle member of the right bearing unit 1 has two processed leaf spring sections 12, and two ball joints 10 are connected via the leaf spring sections. The transfer plate 2 can thereby be moved slightly angularly in the movement plane. Positional errors between the two linear motors 7, 8 and in particular assembly and manufacturing tolerances are thereby compensated. The ball joint 10 further compensates for dimensional tolerances and inconsistencies in the heights of the two bearing units 1.
[0009]
【The invention's effect】
With this coupling technique, it is no longer necessary to place the two bearing units relative to one another with maximum accuracy. The ball joint compensates for minor misalignments and positioning inaccuracies between the two linear motors. Furthermore, the influence of temperature is also compensated. The axis of the ball joint, according to function, is perpendicular to the plane of movement of the entire guide system, thereby maintaining rigidity in the direction of movement and thus positioning accuracy. This makes the assembly by the user much easier and eliminates problems. In that case, each bearing unit travels with its original accuracy and is not affected by other bearing units.
Particularly effective is that the ball joint is elastically supported in the direction of movement. This also compensates for the lack of parallelism and inaccurate distance between the two bearing units. Furthermore, a forward error due to the fact that the two linear motors are not synchronized is compensated.
[Brief description of the drawings]
FIG. 1A is a longitudinal front view of a two-track guide system according to the present invention, and FIG. 1B is a cross-sectional view taken along line AA in FIG. It is a partial top view.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Linear bearing unit 2 Transfer plate 3 U-shaped support material 4 Guide rail 5 L-shaped support adapter 6 Guide carriage 7 Movable part 8 Static part 9 Supporting protrusion 10 Ball joint 11 Mounting angle material 12 Leaf spring section 13 Cover plate

Claims (4)

Moved by two linear motors has a pair of bearing units which are arranged parallel to the right and left, in the bearing unit is two tracks that are coupled laterally by the transfer plate guide systems,
Wherein the point of attachment of the transfer plate (2) guides a carriage (6), the axis guide system ball joint arranged perpendicular to the moving surface (10) is provided Rutotomoni said transfer plate (2) A two-track guide system characterized in that one ball joint (10) is arranged on one end and two ball joints (10) on the other end in substantially the same horizontal plane . Two ball joints attached to said other end portion (10) is a guide system 2 tracks according to claim 1, characterized by being resiliently arranged transversely to the movement direction of the Guide system. 3. A two-track guide system according to claim 1 or 2 , characterized in that each bearing unit (1) is provided with two separate guide carriages (6) which are spaced apart from each other in the direction of movement. . Each bearing unit (1) is housed in a U-shaped support material (3) that is open on the side, the guide carriage (6) is below, the support adapter (5) is in the center, and the linear motors (7, 8) are The two-track guide system according to any one of claims 1 to 3 , wherein the guide system is disposed above.

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