JP2003311562A - Apparatus for reciprocating slide table - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus for reciprocating a slide table, which is compact and lightweight. <P>SOLUTION: A base 1 has an end plate 2 for rotatably supporting one end of a feed screw 5 and a connecting end plate 4 for rotatably supporting the other end of the feed screw 5 at both ends thereof, and a recess 1a is formed so as to elongate along the longitudinal direction. A slide table 11 is arranged in the recess 1a so as to reciprocate in its longitudinal direction, and is driven by means of a feed screw 5. An electric motor 21 is dismountably fixed to the connecting end plate 4 in the neighborhood of the base 1 by means of fixing bolts 22 provided between the connecting end plate 4 and a gear housing 25, which fixing bolts 22 do not come off even after removal of the electric motor 21. The gear housing 25 is dismountably fixed to the outside of the connecting end plate 4, and has a driven gear 31 therein, and supports an end portion of a driven shaft 27 disengageably connected to the feed screw 5. Reduction gears 34 to 37 are built in within the gear housing 25 to transmit the rotation of a drive gear 23 fixed to the output shaft 21a of the motor 21 to the driven gear 31. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slide table reciprocating device for reciprocating a slide table in a linear direction and for moving an object to be conveyed such as a work or a jig placed on the slide table.

[0002]

2. Description of the Related Art A slide device is widely used in processing machines and production facilities to reciprocate jigs and tools.
Examples of such a slide device include a guide mechanism for linearly guiding a slide table holding jigs and works, and a feed mechanism for converting the rotational movement of an electric motor or rotary actuator into the linear movement of the slide table. A slide table reciprocating device consisting of and has been developed. As the guide mechanism, the slide table is guided while contacting the rails provided in the traveling direction,
As a feed mechanism, there is a feed screw that converts rotational movement into linear movement.

[0003]

SUMMARY OF THE INVENTION In a processing machine equipped with small jigs and tools and a production facility for transporting small workpieces, downsizing and thinning of machines and facilities are required. The slide table reciprocating device constituting the device is also required to be downsized. However, in the conventional slide table reciprocating device in which the electric motor, the rotation drive mechanism and the like are housed inside the base, it is impossible to reduce all of the length, width and thickness of the base at the same time. there were. For this reason, the amount of metal material used to form the base cannot be reduced, and there is a limit to weight reduction.

Further, when replacing the motor, it takes time and trouble to remove the motor cover and disassemble the main body, and the screw member for mounting the motor comes off, resulting in the loss. It was

An object of the present invention is to provide a compact and lightweight slide table reciprocating device.

[0006]

In the slide table reciprocating device of the present invention, an end plate rotatably supporting one end of a feed screw and a connecting end plate rotatably supporting the other end are fixed to both ends. A base having a recess extending in the longitudinal direction, a slide table mounted in the recess so as to reciprocate linearly, and driven by the feed screw; and a slide table adjacent to the base. A motor detachably attached to the connecting end plate, and a gear detachably attached to the outside of the connecting end plate and having a driven gear and supporting an end of a driven shaft detachably connected to the feed screw. It has a housing and a reduction gear train that is incorporated in the gear housing and transmits the rotation of a drive gear attached to the main shaft of the motor to the driven gear.

The slide table reciprocating device of the present invention comprises:
A claw portion that engages with an engagement groove formed in the connection end plate is provided, and has a resin motor cover that houses the motor, and the claw portion is formed by manually pinching and deforming the motor cover from the outside. Is disengaged from the connection end plate and the motor cover is removed.

The slide table reciprocating device of the present invention comprises:
The motor is attached to the connecting end plate by a screw member that is installed between the connecting end plate and the gear housing and is provided so as not to fall off to the outside, and the screw member is externally attached by a tool without disassembling the main body. It is characterized in that the motor is detachably attached to the connecting end plate by operating.

The slide table reciprocating device of the present invention comprises:
A guide rail fixed to the bottom surface of the recess, a reciprocating member reciprocally provided on the guide rail, a reciprocating member disposed in the accommodating recess formed in the slide table, and fixed to the reciprocating member, And a nut screwed to the feed screw.

The slide table reciprocating device of the present invention comprises:
A gap is formed between the nut and the bottom surface and the side surface in the width direction of the accommodation recess.

The slide table reciprocating device of the present invention comprises:
Position adjusting screws for restricting the reciprocating end position of the slide table are attached to both end faces of the slide table.

The slide table reciprocating device of the present invention comprises:
The gear housing and the motor cover are molded of resin, respectively.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. 1 is a perspective view showing a slide table reciprocating device according to an embodiment of the present invention, FIG. 2 is a partially cutaway plan view of FIG. 1, and FIG. 3 is a cross section taken along line AA in FIG. FIG. 4 is a sectional view taken along the line BB in FIG. 1, and FIG. 5 is a partially cutaway side view showing a reduction gear mechanism provided in the gear housing.

This slide table reciprocating device is shown in FIG.
Further, as shown in FIG. 4, it has a base 1 having a cup-shaped cross section in which a recess 1a is formed over the entire length extending in the longitudinal direction. An end plate 2 is attached to one end of the base 1 with a fixing screw 3a as shown in FIG. 1, and a connecting end plate 4 is attached to the other end with a fixing screw 3b as shown in FIG. The connecting end plate 4 projects to one side in the width direction of the base 1. One end of the feed screw shaft 5 is rotatably supported on the end plate 2 by a bearing 6a, and the other end of the feed screw shaft 5 is rotatably supported on the connecting end plate 4 by a bearing 6b. The base 1 is manufactured by extrusion molding using a light alloy material such as an aluminum alloy, and the end plate 2 and the connecting end plate 4 are manufactured by resin.

As shown in FIGS. 3 and 4, a guide rail 7 is attached to the bottom surface of the concave portion of the base 1 by a fixing screw 8. A reciprocating member 9 is attached to the guide rail 7 along the feed screw shaft 5. It is reciprocally mounted. A slide table 11 is attached to the reciprocating member 9 with a fixing screw 12. The slide table 11 is arranged in the recess 1a, and a connecting portion 11a to which the fixing screw 12 is attached, and the connecting portion 11a are integrated with each other. Base 1
And support portions 11b extending to the upper surfaces of both side portions of the. A screw hole 13 for screwing a support member (not shown) to the slide table 11 is formed in the support portion 11b, and a work or jig arranged on the support member is conveyed by the slide table 11. To be done.

The rotation of the feed screw shaft 5 is controlled by the slide table 1
In order to convert into one linear reciprocating motion, a nut 14 screwed to the feed screw shaft 5 is housed in a housing recess 15 formed in the slide table 11. The nut 14 has a substantially rectangular parallelepiped shape as a whole, and both end surfaces thereof come into contact with the inner wall surface of the accommodating recess 15 so as to prevent rattling when the slide table 11 is moved, and are located between the bottom surface and the upper surface of the accommodating recess 15. A gap δ1 is formed in the space, and gaps δ2 and δ3 are formed between both side surfaces of the accommodation recess 15 in the width direction. As the feed screw shaft 5 and the nut 14, it is possible to use a ball screw having balls interposed between the respective screw surfaces.

The ends of the cover 16 are attached to the upper surfaces of the end plate 2 and the connecting end plate 4 by fixing screws 17, respectively.
The cover 16 covers the connecting portion 11a of the slide table 11 and the feed screw shaft 5, and the supporting portion 11b of the slide table 11 includes both sides of the cover 16 and the base 1.
It projects from the gap between and.

An electric motor 21 is detachably attached to the connecting end plate 4 at a portion protruding from the base 1. The electric motor 21 is adjacent to the base 1 and is parallel to the side surface thereof. Has become. A fixing screw 22 for fixing the electric motor 21 to the connecting end plate 4 is incorporated between the connecting end plate 4 and the gear housing 25 so that it does not drop out even if the motor is removed. Main shaft 2 of electric motor 21
The drive gear 23 is fixed to 1a, and the electric motor 2
When attaching and removing 1 to the connecting end plate 4,
In order that the drive gear 23 is also attached / detached together with the electric motor 21, the connecting end plate 4 has a through hole 2 having a diameter larger than that of the drive gear 23.
4 are formed.

A resin gear housing 25 is detachably mounted on the outer side of the connecting end plate 4.
5, one end of a driven shaft 27 is rotatably supported via a bearing 26a, and the other end of the driven shaft 27 is detachably connected to the feed screw shaft 5 via a joint 28. . The joint portion 28 is formed by an engagement groove formed in the end portion of the driven shaft 27 in the diametrical direction and a projection formed in the end portion of the feed screw shaft 5 and engaging with the engagement groove. The rotation of the shaft 27 is transmitted to the feed screw shaft 5.

A driven gear 31 is attached to the driven shaft 27, and the drive gear 2 driven by the electric motor 21.
In order to transmit the rotation of No. 3 to the driven gear 31, the gear housing 25 and the connecting end plate 4 have bearings 26b to 26e, respectively.
The intermediate shafts 32 and 33 are rotatably supported by.
The intermediate shaft 32 is provided with a large diameter gear 34 that meshes with the drive gear 23 and a small diameter gear 35 that meshes with the intermediate shaft 33. The intermediate shaft 33 has a large diameter gear that meshes with the small diameter gear 35 formed on the intermediate shaft 32. 36, and a small diameter gear 37 that meshes with the driven gear 31. In this way, the electric motor 2 is driven by the plurality of gears that transmit the rotation of the drive gear 23 to the driven gear 31.
A reduction gear mechanism that decelerates the rotation of the first main shaft 21a and transmits it to the driven shaft 27 is formed.

The gear housing 25 made of resin is used as the connecting end plate 4.
Is attached by a fixing screw 38, and the gear housing 25 can be removed by loosening the fixing screw 38. On the other hand, a resin motor cover 41 that covers the electric motor 21 is detachably attached to the connecting end plate 4 on the opposite side of the gear housing 25. A claw portion 43 that engages with an engagement groove 42 formed in the connecting end plate 4 is provided at an opening end portion of the motor cover 41. By engaging the claw portion 43 with the engagement groove 42, The motor cover 41 can be attached to the connecting end plate 4. On the other hand, when the motor cover 41 is removed from the connecting end plate 4, the motor cover 41 is manually grasped in the direction of the arrow C and pulled out from the connecting end plate 4 while being deformed, so that the claw portion 43 is released from the engaging groove 42. Will be disengaged.

The electric motor 21 can be easily removed by loosening the fixing screw 22 incorporated between the connecting end plate 4 and the gear housing 25. Further, since the fixing screw 22 is incorporated between the connecting end plate 4 and the gear housing 25 and does not drop off to the outside, it is easy to reattach the electric motor.

In order to detect the position of the slide table 11 which reciprocates in the axial direction by the electric motor 21, a plurality of sensor mounting grooves 44 are formed along the longitudinal direction on the outer surfaces of the left and right side wall portions of the base 1. Any sensor mounting groove 44
A magnetic detection sensor can be attached to the. The position of the slide table 11 is detected by the detection signal from this sensor, and the slide table 11 can be stopped at any position other than the stroke end.

On the other hand, in order to regulate the movement of the slide table 11 when the slide table 11 moves to the position of the reciprocating stroke end, position adjusting screws 45 are shown in both end faces of the slide table 11 in FIG. Is installed as. Corresponding to each position adjusting screw 45, a shock absorbing damper 46 made of rubber or the like is attached to the end plate 2 and the connecting end plate 4. By adjusting the protruding length of each position adjusting screw 45, the position of the reciprocating stroke end of the slide table 11 can be adjusted. In this embodiment, since the position adjusting screw 45 is composed of the bolt 45a and the nut 45b, the fixing screw 17 is loosened, the cover 16 is removed, and the bolt 45a is rotated relative to the nut 45b. The protrusion length may be adjusted.

As described above, the sensor mounted in the sensor mounting groove 44 detects that the slide table 11 has moved to a predetermined position, and when the slide table 11 has moved to the stroke end position, the damper 46 restricts the movement. It becomes unnecessary to detect the rotation speed of the electric motor using an encoder or the like. Therefore, an inexpensive DC motor can be used as the electric motor 21, and the slide table 11 can be stopped at the position of the stroke end while maintaining the supply of current to the electric motor 21.

As described above, in this slide table reciprocating device, the electric motor 21 is arranged adjacent to and parallel to the side surface of the base 1, and is connected to one side of the base 1 in the width direction. The gear housing 25 is attached to the end plate 4, and the gear housing 25 is opposite to the electric motor 21.
Is attached to. According to this, the width dimension and the thickness dimension of the base 1 can be reduced as compared with the slide table reciprocating device in which the electric motor and the gear mechanism portion are housed in the device main body. The weight of can be reduced. Since a small DC motor is used for the electric motor 21, the width and thickness of the motor cover 41 can be suppressed. Therefore, a small and thin slide table reciprocating device as a whole can be obtained.

The base 1 is made of a light alloy material such as an aluminum alloy, but as described above, the amount of use can be reduced by reducing the width and thickness of the apparatus body. The weight of 1 can be suppressed. In addition, since the gear housing 25 and the motor cover 41 are made of resin, they can be lightly molded. Therefore, a lightweight slide table reciprocating device can be obtained.

The motor cover 41 is detachably attached to the connecting end plate 4, and the electric motor 21 is detachably attached to the connecting end plate 4. Installation work and removal work can be easily performed.

A gap δ1 is formed between the upper surface of the nut 14 and the bottom surface of the housing recess 15, and a gap δ is formed between both side surfaces of the nut 14 and both widthwise surfaces of the housing recess 15.
Since 2 and δ3 are formed, it is possible to absorb the processing error without increasing the dimensional accuracy of the nut 14 in the width direction or the vertical direction. As a result, the assembling work is facilitated, the wear of the nut 14 can be minimized, and the life of the nut 14 can be extended.

The driven shaft 27 and the feed screw shaft 5 are the same as the driven shaft 2
7 is detachably connected via a joint portion 28 formed by an engagement groove formed in the end portion of 7 in the diametrical direction and a projection formed in the end portion of the feed screw shaft 5 and engaging with the engagement groove. Therefore, the assembling work is facilitated and the reduction gear mechanism can be unitized.

Further, since dampers are attached to the end plate 2 and the connecting end plate 4 in correspondence with the position adjusting screws 45 provided on the slide table 11, a collision noise is generated at the stroke end. Can be prevented.

It is needless to say that the present invention is not limited to the above-mentioned embodiment, and various modifications can be made without departing from the scope of the invention. For example, gear trains 34-3
The deceleration gear mechanism consisting of 7 has only to decelerate and transmit the rotational driving force of the electric motor 21, and is not limited to the number and arrangement shown in this embodiment. For example,
By setting a plurality of reduction ratios, the rotational speed of the feed screw shaft 5 can be arbitrarily changed, and thus the moving speed of the slide table 11 can be arbitrarily changed.
Moreover, the moving speed of the slide table 11 can be arbitrarily changed by changing the combination of the feed screw shaft 5 and the nut 14.

[0033]

According to the present invention, a small and lightweight slide table reciprocating device can be provided.

[Brief description of drawings]

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

FIG. 2 is a partially cutaway plan view of FIG.

3 is a cross-sectional view taken along the line AA in FIG.

FIG. 4 is a cross-sectional view taken along the line BB in FIG.

FIG. 5 is a partially cutaway side view showing a reduction gear mechanism provided in a gear housing.

[Explanation of symbols]

1 base 1a recess 2 end plates 3a, 3b fixing screw 4 Connection end plate 5 Feed screw shaft 6a, 6b bearing 7 Guide rail 8 fixing screws 9 Reciprocating member 11 slide table 11a connection part 11b support part 12 fixing screws 13 screw holes 14 nuts 15 Storage recess 16 covers 17 Fixing screw 21 electric motor 21a Spindle 22 fixing screw 23 Drive gear 24 through holes 25 gear housing 26a to 26e bearings 27 Driven shaft 28 Joint part 31 Driven gear 32,33 Intermediate shaft 34,36 Large diameter gear 35,37 Small diameter gear 38 fixing screw 41 Motor cover 42 engagement groove 43 Claw 44 Sensor mounting groove 45 Position adjustment screw 45a bolt 45b nut 46 damper

Continued front page    (72) Inventor Kazuo Oda             3-8-16 Iwamotocho, Chiyoda-ku, Tokyo Stock             In ceremony company Koganei F-term (reference) 3C011 DD00                 3C048 BC01 DD02                 3J062 AA22 AA23 AB21 AC07 BA12                       CD02 CD22

Claims (7)

[Claims] 1. A base in which an end plate that rotatably supports one end of a feed screw and a connecting end plate that rotatably supports the other end are fixed to both ends, and a recess extending along the longitudinal direction is formed. A table; a slide table reciprocally mounted in the recess in a linear direction and driven by the feed screw; and a motor removably mounted on the connecting end plate adjacent to the base. A gear housing detachably mounted on the outside of the connecting end plate, which has a driven gear and supports an end portion of a driven shaft detachably connected to the feed screw, and a gear housing incorporated in the gear housing, A slide table reciprocating device comprising: a reduction gear train that transmits the rotation of a drive gear attached to a main shaft to the driven gear. 2. The slide table reciprocating device according to claim 1, further comprising: a claw portion that engages with an engaging groove formed in the connecting end plate, and a resin motor cover that accommodates the motor. A slide table reciprocating device, characterized in that the motor cover is gripped and deformed from the outside by hand to disengage the claw portion from the connecting end plate and the motor cover is removed. 3. The slide table reciprocating device according to claim 1, wherein the motor is provided with a screw member that is incorporated between the connecting end plate and the gear housing and is provided so as not to drop outside. A slide table reciprocating device, characterized in that the motor is detachably attached to the connecting end plate by operating the screw member from the outside without disassembling the main body and disassembling the main body. 4. The slide table reciprocating device according to claim 1, further comprising: a guide rail fixed to the bottom surface of the recess, and a reciprocating member reciprocally provided on the guide rail. And a nut fixed to the reciprocating member and screw-coupled to the feed screw, the slide table reciprocating device being disposed in a housing recess formed in the slide table. 5. The slide table reciprocating device according to claim 4, wherein a gap is formed between the nut and the bottom surface of the accommodation recess and the side surface in the width direction. 6. The slide table reciprocating device according to any one of claims 1 to 5, wherein position adjusting screws for restricting a reciprocating end position of the slide table are attached to both end faces of the slide table. Slide table reciprocating device characterized by. 7. The slide table reciprocating device according to claim 1, wherein the gear housing and the motor cover are molded of resin, respectively.