JP2012219874A - Kinetic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a kinetic apparatus whose cost is reduced and which is capable of softly absorbing the error of mounting precision and the error of traveling precision.SOLUTION: A slide actuator 1 includes: a track body 2 including a guide groove 21; and a moving body 3 which is engaged with the inner surface of the guide groove 21 via a plurality of balls 4 in a width direction orthogonal to the extending direction of the track body 2 and is capable of relatively moving in the extending direction with respect to the track body 2. The track body 2 includes: a mounting and fixing part 22 which is formed integrally with the guide groove 21 at both sides in the width direction of the guide groove 21 and has a mounting surface 26a for supporting the guide groove 21; and a bottom plate 23 which forms the bottom of the guide groove 21 and is separated from the mounting surface 26a.

Description

  The present invention relates to an exercise device in which a moving body can move relative to a track body.

  As one of the exercise devices, Patent Literature 1 discloses a linear guide device. This linear guide device forms sliders, inner rails, outer rails, and casings by bending and press-molding sheet metal, maintaining manufacturing accuracy at a specified level while greatly reducing manufacturing costs. As much as possible, each member is fastened with bolts to reduce backlash.

JP 2001-99148 A

  Although the above-mentioned conventional technology has high accuracy and high rigidity, there is a problem that it becomes an overspec product in an application that does not require rigidity and accuracy, and extra cost is required. In addition, since the above-described conventional technology is highly accurate and highly rigid, there is a problem that it is difficult to flexibly absorb an error in the mounting accuracy of the track body and an error in the traveling accuracy of the moving body.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide an exercise device that is inexpensive and can flexibly absorb errors in mounting accuracy and driving accuracy.

  In order to solve the above-described object, the present invention engages a raceway body having a guide groove portion, and an inner surface of the guide groove portion via a plurality of rolling elements in a width direction orthogonal to the extending direction of the raceway body. A moving body relatively movable in the extending direction with respect to the track body, wherein the track body is formed integrally with the guide groove portion on both sides in the width direction of the guide groove portion. In addition, a configuration is adopted in which an attachment fixing portion that has an attachment surface and supports the guide groove portion, and a bottom plate portion that forms a bottom portion of the guide groove portion and is spaced apart from the attachment surface. .

  By adopting this configuration, in the present invention, since the guide groove portion is supported by the mounting fixing portion provided on both sides in the width direction and having the mounting surface, the bottom plate portion of the guide groove portion can be separated from the mounting surface, and The guide groove portion and the mounting fixing portion are integrated with each other, and can be flexibly deformed by the spring property. For this reason, it becomes possible to softly absorb the error of the mounting accuracy of the track body and the error of the traveling accuracy of the moving body by the spring property. Moreover, since the guide groove part and the attachment fixing part are integrally formed, the number of parts can be reduced and the cost can be reduced.

  According to the exercise device of the present invention, it is possible to absorb the error in the mounting accuracy and the error in the running accuracy flexibly at a low cost.

It is a perspective view which shows the structure of the slide actuator in 1st Embodiment of this invention. It is a partial exploded perspective view which shows the structure of the slide actuator in 1st Embodiment of this invention. It is arrow AA sectional drawing in FIG. It is a figure which shows the example of the formation process of the track body by the roll forming process in 1st Embodiment of this invention. It is a figure which shows the structure of the group of the forming roll in the process shown in FIG.4 (e), and the group of the forming roll in the process shown in FIG.4 (f). It is a figure which shows another example of the formation process of the track body by the roll forming process in 1st Embodiment of this invention. It is a perspective view which shows the structure of the slide actuator in 2nd Embodiment of this invention. It is arrow BB sectional drawing in FIG.

  Embodiments of the present invention will be described below with reference to the drawings. In the following description, “integral” means physical integrity of the same member (for example, bending, cutting, casting, etc.), and “integral” is a structural element composed of two or more members. Mean integrity (for example, welding, welding, screw fastening, etc.).

(First embodiment)
FIG. 1 is a perspective view showing a configuration of a slide actuator 1 according to the first embodiment of the present invention. FIG. 2 is a partially exploded perspective view showing the configuration of the slide actuator 1 in the first embodiment of the present invention. FIG. 3 is a cross-sectional view taken along line AA in FIG.

  As shown in FIGS. 1 to 3, the slide actuator (exercise apparatus) 1 includes a track body 2 having a guide groove portion 21, an inner surface of the guide groove portion 21 in the width direction orthogonal to the extending direction of the track body 2, and a plurality of slide actuators. And a movable body 3 which is engaged via a ball (rolling body) 4 and is movable relative to the track body 2 in the extending direction thereof.

  As shown in FIG. 1, the moving body 3 has a drive unit 10. The drive unit 10 has a motor 12 fixed to a mounting plate 11 provided integrally with the track body 2 by spot welding at one end portion in the extending direction of the track body 2. The motor 12 is coupled via a coupling 15 to a screw shaft 14 pivotally supported at both ends by bearings 13 provided at both ends in the extending direction of the track body 2.

  The screw shaft 14 is disposed along the extending direction through the central portion in the guide groove portion 21, and is configured to be rotatable around an axis extending in the extending direction. The bearings 13 are provided at cut-and-raised portions 16 formed integrally with the track body 2 by cutting and raising at both ends in the extending direction of the track body 2.

  As shown in FIG. 2, a nut member 17 is screwed onto the screw shaft 14. The nut member 17 has a substantially cubic block shape. The nut member 17 is fixed to the nut mounting plate 31. The nut mounting plate 31 has an inner rail 32 that is in sliding contact with the ball 4 on both sides in the width direction. Thereby, the relative rotation of the screw shaft 14 and the nut member 17 becomes possible.

  The nut mounting plate 31 has a pair of clamping plates 33 that come into contact with both side surfaces of the nut member 17 in the moving direction. The clamping plate 33 and the inner rail 32 are integrally formed by bending a sheet metal and press molding. The inner rail 32 has a substantially bowl shape that straddles the nut member 17 in the width direction, and rolling grooves 32a (see FIG. 4) are formed on both side portions corresponding to the flange of the hook. The nut mounting plate 31 is integrally fixed to the slider 34 by spot welding. An article (not shown) to be guided by the slide actuator 1 is connected to the slider 34.

  As shown in FIG. 1, a plurality of balls 4 are arranged between the guide groove 21 and the inner rail 32 so as to be freely rollable. Thereby, the inner rail 32 supported by the guide groove 21 via the ball 4 can smoothly move in the extending direction of the track body 2 along the guide groove 21. Each ball 4 is held at a constant relative position with a distance by a retainer 41.

  As shown in FIG. 3, the retainer 41 has a substantially U-shaped cross-sectional view, and a first holding portion 42 that holds the interval between the balls 4 on one side in the width direction (left side in FIG. 3), And a second holding portion 43 that holds the interval between the balls 4 on the other side in the width direction (the right side in FIG. 4). The first holding part 42 and the second holding part 43 are integrally formed by sheet metal bending and press molding.

  The track body 2 includes a guide groove portion 21 and an attachment fixing portion 22. The guide groove 21 corresponds to an outer rail and a casing referred to in the prior art. As shown in FIG. 3, the guide groove portion 21 includes a bottom plate portion 23 that forms a bottom portion, and a pair of side plate portions 24 that stand in the same direction from both widthwise end portions of the bottom plate portion 23. The front end portion 24a of the side plate portion 24 is bent toward the inside (the center portion in the width direction), and the opening of the guide groove portion 21 is reduced by a predetermined amount.

  The first bent portion 24b of the side plate portion 24 with respect to the bottom plate portion 23 and the second bent portion 24c of the distal end portion 24a of the side plate portion 24 each have an arc shape in cross section, and the rolling groove 21a of the ball 4 Is forming. The guide groove portion 21 of the present embodiment has a total of four rolling grooves 21a, two at the corners on the left and right inner surfaces in the width direction. The rolling groove 21 a is disposed to face the rolling groove 32 a of the inner rail 32 with the ball 4 interposed therebetween. The rolling groove 21a and the rolling groove 32a have substantially the same curvature. Thus, a plurality of rolling grooves 21a are provided according to the position where the ball 4 is engaged.

  The attachment fixing portions 22 are provided on both sides of the guide groove portion 21 in the width direction. The mounting fixing portion 22 is bent outward from the distal end portion 24 a and is substantially parallel to the bottom plate portion 23 and the leg portion 25 extending along the outside of the side plate portion 24 in the direction opposite to the standing direction of the side plate portion 24. And a base mounting portion 26 bent with respect to the leg portion 25 as described above.

  The leg portion 25 is formed longer than the side plate portion 24. The base attachment portion 26 has an attachment surface 26a that contacts the base (not shown) to which the track body 2 is to be attached. A plurality of hole portions 27 are formed in the base mounting portion 26 (see FIG. 2). Bolts 28 are inserted into the holes 27, and the base mounting portions 26 are fastened and fixed to a base (not shown).

  As shown in FIG. 3, the mounting fixing portion 22 supports the guide groove portion 21. The bottom plate portion 23 of the guide groove portion 21 is located above the same plane as the mounting surface 26a with respect to the mounting surface 26a of the mounting fixing portion 22 (in other words, away from the base (not shown)). (In the direction opposite to the insertion direction). For this reason, the bottom plate part 23 of the guide groove part 21 is in a floating state without being in contact with the base (not shown).

The guide groove portion 21 and the attachment fixing portion 22 are integrally formed by roll forming. The roll forming process is a process method in which a plurality of sets of forming rolls are bent gradually and continuously while passing a metal plate or a metal band.
FIG. 4 is a diagram illustrating an example of a forming process of the track body 2 by roll forming in the first embodiment of the present invention.

In this forming step, as shown in FIG. 4A, first, a metal plate 100 that is a material of the track body 2 is prepared. As the metal plate 100 of this embodiment, SUS304 and SPCC can be used.
Next, as shown in FIG. 4B, the upper two rolling grooves 21a are formed by an initial bending process. In the forming process, the deformation is advanced so as not to generate the peripheral speed difference at the contact portion between the metal plate 100 and the forming roll as much as possible.

Next, as shown in FIGS. 4C and 4D, the metal plate 100 is bent and folded on both sides in the width direction, and the portions corresponding to the side plate portion 24 and the leg portion 25 are gradually raised. .
Next, as shown in FIG. 4 (e), the two lower rolling grooves 21a are formed, and finally the final shape is formed as shown in FIG. 4 (f).

FIG. 5 is a diagram showing a configuration of a forming roll set in the step shown in FIG. 4E and a forming roll set in the step shown in FIG.
In the step shown in FIG. 4 (e), the lower two rolling grooves 21a are formed, and the side plate portion 24 and the leg portion 25 are raised, so as shown in FIG. As above, it is preferable to proceed the forming of the rolling groove 21a by using a set of the middle convex shaped roll 101a1 and the middle concave shaped roll 101a2.

  In the step shown in FIG. 4 (f), in order to form the final shape, as shown in FIG. 5 (b), the forming may be advanced using a pin roll 101b having a shape along the inner surface of the guide groove portion 21. preferable. The pin roll 101b can come into contact with the four rolling grooves 21a, and the shape dimensions of the four rolling grooves 21a can be simultaneously formed. In addition, the pin roll 101b is assembled by bringing the pair of left and right pin rolls 101b into close contact with each other, and by forming four upper and lower rolling grooves 21a, the pin roll 101b alone has an inner dimension for accuracy control between the vertical R dimension and the tip diameter. The dimension between the four grooves can be formed with high accuracy.

FIG. 6 is a diagram illustrating another example of the forming process of the track body 2 by roll forming in the first embodiment of the present invention.
In this molding step, unlike the molding step shown in FIG. 4, as shown in FIGS. 6 (a) to 6 (d), a portion corresponding to the guide groove portion 21 having four rolling grooves 21a is first molded. Thereafter, as shown in FIGS. 6E and 6F, a portion corresponding to the attachment fixing portion 22 is formed. 6D, when forming the portion corresponding to the guide groove portion 21, it is preferable to advance the forming using the pin roll 101b as in FIG. 5B.

The molding process shown in FIG. 4 is more advantageous than the molding process shown in FIG. 6 in that when the portions corresponding to the side plate portions 24 and the leg portions 25 are molded, the shape of the rolling groove 21a is not affected. It is.
On the other hand, the molding step shown in FIG. 6 is more advantageous than the molding step shown in FIG. 4 in that it is easy to secure a gap between the side plate portion 24 and the leg portion 25.

  Therefore, when it is desired to increase the accuracy of the guide groove portion 21, it is preferable to select the molding step shown in FIG. On the other hand, when it is desired to increase the accuracy of the mounting and fixing portion 22, it is preferable to select the molding step shown in FIG.

According to the slide actuator 1 configured as described above, it is possible to flexibly absorb errors in the mounting accuracy of the track body 2 and errors in running accuracy of the moving body 3.
That is, as shown in FIG. 3, the slide actuator 1 is integrally formed with the guide groove 21 on both sides in the width direction of the guide groove 21, and has an attachment surface 26 a to support the guide groove 21. Part 22.

  Since the guide groove portion 21 is supported by the attachment fixing portion 22, the bottom plate portion 23 of the guide groove portion 21 can be separated from the attachment surface 26a, and is not rigidly fixed or restrained by a bolt or the like. Since the guide groove portion 21 and the attachment fixing portion 22 are integrated, they can be flexibly deformed by the spring property. For this reason, even if an error in the mounting accuracy of the track body 2 or an error in the traveling accuracy of the moving body 3 occurs, flexible deformation (particularly in the gap between the side plate portion 24 and the leg portion 25) occurs according to the error. Deformation) and the error is absorbed.

  Moreover, according to the slide actuator 1, since the guide groove part 21 and the attachment fixing | fixed part 22 are integrally formed, the number of parts can be reduced and it can contribute to a cost reduction. Moreover, since the number of parts can be reduced, it can contribute to weight reduction and compactness. Furthermore, by integrally forming the guide groove portion 21 and the mounting fixing portion 22 by roll forming, the throughput relating to the manufacturing of the track body 2 is greatly improved, so that mass production is possible, which is more cost-effective than conventional products. Benefits can be achieved.

  Further, according to the slide actuator 1 of the present embodiment, the four pairs of rolling grooves 21a and 34a via the balls 4 have a 45-degree oblique contact structure, so that loads in four directions can be received and the mounting posture is not selected. . Further, according to the slide actuator 1, the inner rail 32 and the slider 34 that are in sliding contact with the ball 4 are integrated by welding, and the retainer 41 that holds the ball 4 is formed integrally with the left and right, so that the assembly of the product is simplified. In terms of assembly workability, there are advantages in terms of time and cost.

  Therefore, according to the first embodiment described above, the track body 2 having the guide groove portion 21 is engaged with the inner surface of the guide groove portion 21 via the plurality of balls 4 in the width direction orthogonal to the extending direction of the track body 2. In addition, the slide actuator 1 includes a moving body 3 that can move relative to the track body 2 in the extending direction, and the track body 2 includes a guide groove portion 21 on both sides of the guide groove portion 21 in the width direction. A mounting fixing portion 22 that is formed integrally and has a mounting surface 26a to support the guide groove portion 21, and a bottom plate portion 23 that forms the bottom portion of the guide groove portion 21 and is spaced from the mounting surface 26a. By adopting the configuration, it is possible to easily and inexpensively reduce the weight and size, and to flexibly absorb errors in mounting accuracy and errors in running accuracy.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the following description, the same or equivalent components as those of the above-described embodiment are denoted by the same reference numerals, and the description thereof is simplified or omitted.

FIG. 7 is a perspective view showing the configuration of the slide actuator 1 in the second embodiment of the present invention. 8 is a cross-sectional view taken along the line BB in FIG.
As shown in FIGS. 7 and 8, in the second embodiment, the belt driving method is adopted as the driving unit 10 of the moving body 3, and the roller 51 is adopted as the rolling element. Different.

  As shown in FIG. 7, the drive unit 10 of the second embodiment includes a belt 53 that is installed along the extending direction by pulleys 52 provided at both ends of the track body 2 in the extending direction. One of the paired pulleys 52 is provided with an input shaft 54 to which a rotational driving force of a motor (not shown) is input.

  The pulley 52 is rotatably supported by a bearing 55 around an axis extending in the thickness direction (vertical direction) orthogonal to the extending direction and also orthogonal to the width direction. The bearings 55 are provided at pulley brackets 56 formed integrally with the track body 2 by cutting and raising at both ends in the extending direction of the track body 2.

  As shown in FIG. 8, a belt bracket 57 is connected to the belt 53. The belt bracket 57 is fixed to the slider 34 with screws. A roller 51 with a shaft is provided on the inner rail 32. The moving body 3 is engaged with the guide groove portion 21 via the roller 51.

  The diameter of the roller 51 is configured to be smaller than the distance between the lower rolling groove 21a of the guide groove 21 and the upper rolling groove 21a. Thereby, a gap can be formed. For example, when the roller 51 rolls along the lower rolling groove 21a, it can be prevented from simultaneously hitting the upper rolling groove 21a. Rolling is possible.

  Also in the slide actuator 1 of the second embodiment configured as described above, the same operational effects as those of the first embodiment can be obtained. Specifically, it is possible to absorb the error in the mounting accuracy and the error in the running accuracy flexibly at a low cost.

  As mentioned above, although preferred embodiment of this invention was described referring drawings, this invention is not limited to the said embodiment. Various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

  For example, in the first embodiment, the drive unit is configured with a slide screw. However, the present invention can be applied to a ball screw.

  For example, in the said embodiment, although the form which has a drive part was illustrated, for example, this invention is applicable also to the form of the slide mechanism which does not have a drive part.

  DESCRIPTION OF SYMBOLS 1 ... Slide actuator (exercise apparatus), 2 ... Track body, 3 ... Moving body, 4 ... Ball (rolling body), 21 ... Guide groove part, 21a ... Rolling groove, 22 ... Mounting fixing part, 23 ... Bottom plate part, 24 ... side plate part, 24a ... tip part, 24b ... first bent part, 24c ... second bent part, 26a ... mounting surface, 32 ... inner rail, 34 ... slider, 42 ... first holding part, 43 ... first 2 holding parts, 51 ... roller (rolling element)

Claims (5)

A track body having a guide groove portion is engaged with the inner surface of the guide groove portion via a plurality of rolling elements in a width direction orthogonal to the extending direction of the track body, and relative to the track body in the extending direction. An exercise device having a movable body,
The track body is
An attachment fixing portion that is formed integrally with the guide groove portion on both sides in the width direction of the guide groove portion, and has a mounting surface to support the guide groove portion;
Forming a bottom portion of the guide groove portion, and a bottom plate portion spaced from the mounting surface;
An exercise apparatus comprising:   The exercise device according to claim 1, wherein the track body includes the guide groove portion and the attachment fixing portion which are integrally formed by roll forming. The moving body includes a slider that moves relative to the track body in the extending direction, and an inner rail that is provided on the slider and that is in sliding contact with the rolling element.
The exercise device according to claim 1, wherein the slider and the inner rail are integrally formed.   The exercise apparatus according to any one of claims 1 to 3, wherein the guide groove portion includes a plurality of rolling grooves provided in accordance with positions where the rolling elements are engaged. The guide groove portion has a pair of side plate portions that stand up in the same direction from the width direction both end portions of the bottom plate portion and whose front end portions are bent toward the width direction center portion,
The first bent portion of the side plate portion with respect to the bottom plate portion and the second bent portion of the tip portion of the side plate portion respectively form the rolling groove. The exercise device described.

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