JPH0439454A - Linear sliding device - Google Patents

Abstract

PURPOSE:To shorten height, eliminate a protrusion behind a cylinder and miniaturize the linaer sliding device by constituting a upper part of a cylinder of a flat plate-shaped roller base and a slide plate fitted between the cylinder and this roller base. CONSTITUTION:A roller 4a, having a slope in the upper and lower parts of the outside peripheral surface, and a shaft 4b are provided in a shaft-provided roller 4 and fixed to a roller base 2. Further, a slide plate 5 is formed in a thin plate shape and provided with a groove 5a engaged with the roller 4a of the shaft-provided roller 4 in both side surfaces, and a front part of the plate 5 is fixed to an angle head 3. In this way, a linear sliding device, whose height and width can be small formed, can resist against also a large overhang load in the head front surface.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a relatively small, short-stroke linear sliding device used in robots or automatic assembly machines.

BACKGROUND OF THE INVENTION Conventional sliding devices for automatic machines have been those in which the sliding mechanism is connected to an air cylinder or the like, or those in which the air cylinder is incorporated within the sliding device.

More recently, special air cylinders with sliding mechanisms have also been adopted. Typical examples include a parallel cylinder type in which two IC cylinders 15 are arranged in parallel and the tips of rods 16 are joined together as shown in FIG. A hollow cylindrical pole bush 17 for linear movement is provided on both sides, and a V shaft 18 passes through the bow bush 17.
There was a pole bush type that integrally connected the tip of the shaft 18 and the tip of the loft 16.0 Also, if a sweater was used instead of a cylinder, the drive mechanism could include a transmission part such as a gear or Many devices have been used in which rotary motion is converted into linear motion using a ball screw nut or the like using a Bohne V or a bearing, and this is connected to a linear sliding mechanism.

Problems to be Solved by the Invention The above-mentioned parallel V burner guide requires two cylinders 15, which has the problem of increasing the size of the device. Further, the pole bushing type also has a problem in that the diametrical dimension is large because the bow-pull 17 is provided on the outside of the cylinder 15 and is parallel to the cylinder 15. Furthermore, in the pole bush type, since the head 19 connected to the tip of the 9-yaft 18 and the loft 16 is fixed only with the screws of the y-yaft 18 and the rod 16, if a large overhang load is applied to the head 19, There is a problem in that excessive force is applied to the joint between the head 19 and the rod 16 or shaft 18, causing the joint to deform and the head 19 to tilt. In addition, as a countermeasure, the head 19 is extended from the side of the S/l)under 15 to the rear, and is connected at the rear of the shaft 18, but this structure has the problem that the shaft 18 becomes long. It had a point.

In addition, the above-mentioned sliding device using an air cylinder has the problem of poor stopping accuracy because the mechanism for stopping the stroke at high speed uses a method that directly brakes the loft using air pressure. was. For this reason, a combination of a motor and a ball screw is often used, and motor control has enabled extremely accurate control. This requires a guide mechanism, etc., which increases the size and weight of the entire device.

The present invention has been made in view of the above-mentioned problems of the conventional technology, and its purpose is to have a relatively short travel time, to be usable for robots and automatic assembly machines, and to be able to be used in robots and automatic assembly machines. The aim is to provide a linear sliding device that is large, compact, and lightweight.

Means for Solving the Problems In order to achieve the above object, the linear sliding device according to the present invention includes a power section 1, a roller pace 2, an angle head 6, a shafted roller 4, and a slide plate 5. The power unit 1 is composed of a rotating body such as a motor or a piston/cylinder body, and the output shaft 1c protrudes from one side, and the roller pace 2 has a flat upper part. The angle head 3 has a notch 2a at the front of the upper part, and the power part 11c is fixed to the angle head 3.
1, the vertical surface is fixed or fitted with the output shaft 1c, and the horizontal surface moves in and out of the notch 2a of the roller pace 2 as the output shaft 1c moves back and forth.1. 4 has a roller 4a and a shaft 4b that have inclined surfaces on the upper and lower sides of the outer peripheral surface and can rotate freely, and the low two base 2#I: is fixed, and the slide plate 5 is in the form of a thin plate. It is characterized in that it has grooves 5a on both sides that engage with the rollers 4a of the shafted roller 4, and the front part is fixed to the angle head 5. In order to convert the rotational motion of the output shaft 1c into the linear motion of the output shaft 1c, a ball screw nut 6 is fixed to the vertical surface of the angle head 3, and the output shaft 1c made of a ball screw can be fitted into the nut 6. .

In addition, in order to prevent the output shaft 1c made of the ball screw from protruding forward beyond the vertical surface of the angle head 5, the tip of the output shaft 1c and the vertical surface of the angle head 3 are fixed, and the outer circumference of the output shaft 1o is fixed. It is also possible to insert a nut 6 for a bolt screw having a gear 6a into the power part 1, make the rotating shaft 1e having a gear 1d protrude from the end face of the power section 1, and make the gear 6a and the gear 1d engage with each other.

Furthermore, a braking device 14 having a bow 59 screw nut 6 may be provided on the outer periphery of the output shaft 1c to stop the output shaft 1c in the middle of its linear motion.

A slide mechanism using a roller with an operating shaft and a slide plate that fits inside the roller is installed at the top of the power unit, so the height and width can be made smaller than conventional ones, and the nut for over-pel screws with a large front head can be formed. By providing a braking device in combination with the linear motion, it is possible to accurately stop the linear motion in the middle of the stroke.

Example Examples will be described with reference to the drawings.

(Example 1) Figures JG1 to JG3 are drawings showing the first embodiment of the present invention, and 1 is a power unit, which is composed of a rotating body 1a such as a motor and a transmission device 1b such as a transmission. An output shaft 1c made of a ball screw projects from an end surface of the transmission device 1b. A flat roller pace 2 is installed on the top surface of the power unit 1)
2b, and the low two base 2 is fixed by the third
As shown in the figure, the front part has a CU-shaped notch 2a, and shafted rollers 4 are attached to the four corners.

The shafted roller 4 consists of a roller 4a and a shaft 4b, each having an inclined surface on the upper and lower sides of its outer circumferential surface, and a flat plate-shaped sphoid grate 5 having a groove 5a that engages with the roller 4a is attached to the upper part of the roller pace 2. It is provided. Further, an angle head 5 having a 5-shaped side surface is attached to the lower part of the slide plate 5 by bo~) 3a, and the vertical surface of the angle head 5 is connected to the output shaft 1c via a screw nut 6. It is inserted.

To explain the operation of this device, when the output shaft 1c is rotated by the rotating body 1alC via the transmission device 1b, the angle head 3 is converted into a linear movement back and forth by the bolt/screw nut 61c. Then, the slide plate 5 fixed to the angle head 5 moves along the front and rear shafted rollers 4 fixed to the roller base 2. Also, due to this movement, the horizontal surface of the angle head 5 enters and exits the notch 2a of the roller base 2.

(9i! Example 2) FIGS. 4 and 5 are drawings showing a second example of the present invention. In Example 11c, the output shaft 1c and the vertical surface of the angle shaft 3 are fixed, Output shaft 1c is angle head 3
It is designed so that it does not protrude to the front. That is, the rotation of the rotating body 1a is caused by the rotating shaft 1el via the transmission device 1b.
C is transmitted, and the gear 1d rotates, which is transmitted to the gear 6a of the ball screw napft 6 that meshes with the gear 1d, and the rotational motion of the napft 6 is converted into the linear motion of the output shaft 1c.

(Embodiment 5) Fig. 6 is a drawing showing a fifth embodiment of the present invention, in which the power section 1 is composed of an air yy heater, the output shaft 1c is made of a screw), and a ball screw is attached to the end of the output shaft 1c. is provided and fixed by the angle head 3 and the nuff 10. Further, a braking device is provided on the outer peripheral surface of the output shaft 1c. The braking device includes a ball screw napft 6, a plate pawl 7 having a plate 9 on the end surface of the naphof, and a magnet 8 on the side facing the plate 9. To explain this operation, when the output shaft 1c moves linearly back and forth from the power unit 11c, the ball screw nut 6 rotates while being supported by a bow μ bearing, etc., and the sensor 15 generates a stop signal at a predetermined position. When the magnet 8 is turned on and the magnet 8 is excited, the magnet 8 attracts the plate 9 as shown in FIG. 6, thereby braking the rotation of the ball screw nut 6 and braking the linear motion of the output shaft 1c.

Note that 111 is a bow of a bearing for holding the ball screw nut 6 so that it can rotate, and 12 is an actor race of the bearing.

Effects of the Invention Since the present invention is configured as described above, it has the following effects.

(1) The upper part of the cylinder consists of a flat roller plate and a slide plate that fits between these, so the height dimension is short and there is nothing protruding from the rear of the cylinder, so it can be used as a small linear sliding device. It can be done.

(Force) Since it has a slide plate that slides along the roller, it can slide with high precision even if a large overhang load is applied to the front surface of the angle head.

(3) Since it can be manufactured using standard motors and cylinders, it can be manufactured at low cost.

(4) By providing the braking device according to claim 4,
It is possible to accurately stop linear motion in the middle of a stroke.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view of a linear sliding device showing a one-shot embodiment of the present invention, FIG. 2 is a front view of the same, FIG. 6 is a plan view of the roller pace according to FIG. 1, and FIG. The figure is a partially cutaway side view of a linear sliding device showing a second embodiment of the present invention, FIG. 5 is a front view of the same, and FIG. 6 is a linear sliding device showing a third embodiment of the present invention. Fig. 7 is a partially cutaway side view of a conventional parallel cylinder type sliding device, and Fig. 8 is a partially cutaway side view of a conventional parallel cylinder type sliding device.
FIG. 2 is a partially cutaway view of a Gush type sliding device.

Claims (4)

[Claims] (1) A linear sliding device comprising a power section (1), a roller pace (2), an angle head (3), a shafted roller (4), and a slide plate (5), The part (1) consists of a rotary body or a piston/cylinder body, and the output shaft (1c) protrudes from one side. The power section (1) has a cutout (2a);
The angle head (3) is fixed to the angle head (3).
) has an L-shaped side surface, and the vertical surface is the output shaft (1c
) is fixed or fitted with the output shaft (
The shafted roller (4) moves in and out of the notch (2a) of the roller pace (2) by the movement of the shaft (4b) and the shaft (4b). ), and is fixed to the roller pace (2), and the slide plate (5) has a thin plate shape, and has rollers (4a) of the shafted roller (4) on both sides. The front part has an engaging groove (5a) and the angle head (3).
A linear sliding device characterized by being fixed with. (2) A ball screw nut (6) is fixed to the vertical surface of the angle head (3) according to claim (1).
), wherein the output shaft (1c) made of a ball screw is fitted into the shaft. (3) The output shaft (1c) according to claim (1) is made of a ball screw, one end of which is fixed to the vertical surface of the angle head (3), and a ball screw nut (6) having a gear (6a) is attached to the outer periphery. The ball screw nut (6) is supported so that it can rotate freely, and the power section (1) has a gear (
A linear sliding device, characterized in that a rotating shaft (1e) with a shaft (1d) protrudes, the gear (1d) meshing with the gear (6a) of the nut (6). (4) An output shaft (1c) consisting of a ball screw that fits into the power unit (1) and performs linear motion is fixed to the vertical surface of the angle head (3) according to claim (1), and the output shaft (1c) A linear sliding device characterized in that a braking device (14) having a ball screw nut (6) supported so as to freely rotate on the outer periphery of the device is provided.