JP2014129857A - Motion guide device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motion guide device which is used in a vibration isolation device, can improve a recovery force to an original position, is small in size and high in rigidity, and has a long life period.SOLUTION: A motion guide device comprises: first and second raceway members arranged in non-parallel with each other; a first moving member assembled to be movable along the longitudinal direction of the first raceway member; and a second moving member connected to the first moving member, and assembled to be movable along the longitudinal direction of the second raceway member. In the motion guide device, back faces of the first moving member and the second moving member are connected to each other, and the first raceway member and the second raceway member, and the first moving member and the second moving member are laminated. The first and second raceway members comprise stoppers having opposing faces opposing both side faces of the first and second moving members, and also comprise elastic bodies for connecting the side faces of the first and second moving members and the opposing faces, respectively.

Description

  The present invention relates to a motion guide device that can be applied to a vibration isolator for isolating vibrations that are input by driving the device or vibrations such as earthquakes.

  2. Description of the Related Art Conventionally, a vibration isolator that makes it difficult to transmit vibrations of a base or the ground to an object to be protected has been known as a countermeasure against vibration associated with driving of an engine of an automobile or the like or a countermeasure against earthquakes in a building.

  Various forms of such a vibration isolator are known. For example, as shown in Patent Document 1, a linear motion device in the X-axis direction and a linear motion device in the Y-axis direction arranged orthogonal to each other. There is known a vibration isolator having a configuration in which the moving member of each linear motion device is biased in the longitudinal direction of the track member by a tension spring.

  The vibration isolator configured in this way can be quickly returned to the original position by the elastic force of the tension spring even when the position of the equipment installation base changes due to an earthquake or the like. Furthermore, what was described in patent document 2 is known as what combined with the damping mechanism for converging the generated vibration, for example.

JP 58-124843 A JP 2001-153179 A

  However, according to the conventional configuration, the moving member and the base are connected by a tension spring, and the tension spring is arranged offset in the width direction from the axis of the raceway member. When the tension spring is used in such an arrangement, there is a problem that when a moment load is applied to the tension spring, the tension spring is damaged or the restoring force of the tension spring is adversely affected. In addition, since the tension spring is offset in the width direction, not only the moving member is increased in size in the width direction, but it is also necessary to provide a portion for attaching the tension spring to the base. It had a problem that

  The present invention has been made to solve the above-described problems, and is capable of improving the restoring force to the original position of the motion guide device used in the vibration isolator, and is small and highly rigid for a long period of time. An object of the present invention is to provide a motion guide device having a service life of.

  A motion guide apparatus according to the present invention includes first and second track members arranged non-parallel to each other, and a first moving member assembled so as to be movable along a longitudinal direction of the first track member. A second moving member coupled to the first moving member and movably assembled along a longitudinal direction of the second track member, the first moving member and the second moving member. In the motion guide apparatus configured by stacking the first track member, the second track member, the first moving member, and the second moving member by connecting the back surfaces of the moving members of each other, The first and second track members are each provided with a stopper having opposing surfaces that oppose both side surfaces of the second and first moving members, and are opposed to the side surfaces of the first and second moving members. It is characterized by having an elastic body that connects between each surface .

  According to the present invention, the first and second track members are each provided with a stopper having opposing surfaces facing the both side surfaces of the second and first moving members, and the side surfaces of the first and second moving members. And an elastic body that connects between the opposite surfaces, respectively, the elastic body can be disposed along the centers of the first and second track members, and no moment load is applied to the elastic body, It is possible to prevent the elastic body from being damaged and maintain the restoring force. Moreover, since the elastic body has connected between the both sides | surfaces of the 1st and 2nd moving member, and the opposing surface of a stopper, it contributes to size reduction of a motion guide apparatus.

The perspective view which shows the exercise | movement guide apparatus which concerns on the 1st Embodiment of this invention. The partial cross section perspective view for demonstrating the structure of the linear guide apparatus of the movement guide apparatus which concerns on the 1st Embodiment of this invention. The perspective view for demonstrating operation | movement of the exercise | movement guide apparatus which concerns on the 1st Embodiment of this invention. The perspective view which shows the exercise | movement guide apparatus which concerns on the 2nd Embodiment of this invention. The figure which shows the exercise | movement guide apparatus which concerns on the 3rd Embodiment of this invention. The perspective view which shows the exercise | movement guide apparatus which concerns on the 4th Embodiment of this invention.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, embodiments of a motion guide device according to the invention will be described with reference to the drawings. The following embodiments do not limit the invention according to each claim, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. .

[First Embodiment]
FIG. 1 is a perspective view showing a motion guide device according to the first embodiment of the present invention, and FIG. 2 explains the configuration of the linear motion guide device of the motion guide device according to the first embodiment of the present invention. FIG. 3 is a perspective view for explaining the operation of the motion guide device according to the first embodiment of the present invention.

  As shown in FIG. 1, the motion guide apparatus 1 according to the present embodiment includes a first track member 10a and a second track member 10b that are arranged so as to be non-parallel to each other, and the first track member. The first moving member 20a is movably assembled along the longitudinal direction of 10a, and is coupled to the first moving member 20a and is movably assembled along the longitudinal direction of the second track member 10b. And a second moving member 20b. Further, the motion guide device 1 according to the present embodiment includes two sets of linear motion guide devices 2 including the first and second track members 10a and 10b and the first and second moving members 20a and 20b. The second moving members 20 a and 20 b are arranged so as to be back-to-back with each other, stacked, and integrated by the connecting means 26.

  In the motion guide apparatus 1 according to the present embodiment, the first track member 10a and the second track member 10b are arranged non-parallel, and preferably, the allowable displacement amount is maximized. It is good to arrange so as to be orthogonal when viewed from above.

  The coupling means 26 is formed with fitting grooves arranged perpendicular to each other on the upper surface and the lower surface in order to integrate the first and second moving members 20a, 20b perpendicularly to each other. The first and second moving members 20a, 20b are fitted into the fitting groove and integrated.

  The first moving member 20a and the second moving member 20b may be formed as one moving member without using the connecting means 26. In other words, the first track member 10a may be assembled on one surface side of a single moving member, and the second track member 10b may be assembled on the other surface side opposite to this. However, in the following description of the present embodiment, for the sake of explanation, a configuration in which two moving members are stacked and connected will be described as an example.

  Next, with reference to FIG. 2, the linear motion guide apparatus 2 which comprises the exercise | movement guide apparatus 1 which concerns on this embodiment is demonstrated. In the following description, the linear motion guide device 2 including the first track member 10a and the first moving member 20a will be described, but the linear motion guide including the second track member 10b and the second moving member 20b. Since the apparatus has the same configuration as the linear guide apparatus 2 having the first track member 10a and the first moving member 20a, only the reference numerals are given, and detailed description thereof is omitted.

  The linear motion guide device 2 according to the present embodiment is opposed to the first raceway member 10a in which a plurality of rolling element rolling surfaces 11 are formed on the outer surface along the longitudinal direction, and the rolling element rolling surface 11. A loaded rolling element rolling surface 23 is formed, and a first moving member 20a is attached to the first raceway member 10a via a plurality of rolling elements 30 so as to be able to reciprocate.

  A plurality of bolt holes 12 are drilled from the top surface 13 toward the bottom surface 14 in the first track member 10a. The linear guide device 2 according to the present embodiment is fastened to a counterpart component such as a base by inserting bolts into the plurality of bolt holes 12 formed in the first track member 10a. The first track member 10a is a long member having a substantially rectangular cross section, and two rolling element rolling surfaces 11 are formed symmetrically on each of the left and right sides.

  The first moving member 20a has a substantially U-shaped cross section so as to straddle the top surface 13 and the left and right side surfaces of the first track member 10a, and the moving member main body 21 and the moving member main body 21 reciprocate. And a pair of side lids 22 attached to both end faces in the movement direction.

  The movable member main body 21 and the side lid 22 have a central portion that faces the top surface 13 of the first track member 10a and a pair of leg portions that face the left and right side surfaces of the first track member 10a. . The moving member main body 21 is formed with, for example, a total of four rolling rolling element rolling surfaces 23 extending in the longitudinal direction of the first track member 10a so as to face the rolling element rolling surface 11 of the first track member 10a. Has been.

  Further, a total of four rolling element return passages 24 extending in parallel to the load rolling element rolling surface 23 are formed in the moving member main body 21.

  Further, the side lid 22 is formed with a U-shaped direction changing path 25 that connects one end of the load rolling element rolling surface 23 and one end of the rolling element return passage 24. An infinite circulation path composed of a rolling element rolling path composed of the rolling element rolling surface 11 and a loaded rolling element rolling surface 23, a pair of direction changing paths 25 and a rolling element return path 24 is formed.

  Since the rolling element 30 is interposed between the rolling element rolling surface 11 and the load rolling element rolling surface 23 in the linear motion guide device 2 according to the present embodiment, the first moving member 20a is attached to the first moving member 20a. When the track member 10a is moved along the longitudinal direction, a rolling motion can be performed. The rolling element 30 that has rolled to one end of the loaded rolling element rolling path is lifted up by the upper part of the ridge formed on the side lid 22 and guided to one direction changing path 25. The rolling element 30 whose traveling direction has been changed by the direction changing path 25 rolls on the rolling element return path 24, passes through the other direction changing path 25, and then returns to the loaded rolling element rolling path again. Thus, the rolling element 30 rolls to realize infinite circulation.

  Further, as the plurality of rolling elements 30, balls formed in a spherical shape are preferably used. Further, the plurality of rolling elements 30 are held by a belt-like retainer 31 including a spacer portion disposed between adjacent rolling members 30 and a belt-like connecting band that connects the spacer portions arranged along the longitudinal direction. Has been. Thus, collision between the rolling elements 30 can be prevented by the spacers disposed between the rolling elements 30. Further, since the rolling elements 30 are connected and held in series by the belt-like retainer 31, the rolling elements 30 can be rolled while being aligned.

  In the cross section in the width direction of the linear motion guide device 2, the rolling element rolling groove 11 and the loaded rolling element rolling groove 23 are formed in a circular arc shape formed with a single curvature larger than the curvature radius of the rolling element 30. Has been.

  Next, referring to FIG. 1 again, the configuration of the motion guide apparatus 1 according to the present embodiment will be described. Stoppers 40 are attached to the top surfaces 13 at both ends in the longitudinal direction of the first and second track members 10a and 10b, respectively. The stopper 40 is fixed by the fastening means 50 using the bolt holes 12 formed in the first and second track members 10a and 10b. The stopper 40 attached to the 1st and 2nd track members 10a and 10b uses the same member. As described above, since the stopper 40 is fastened by using the bolt hole 12, a conventional structure can be used as it is without forming a new structure for fixing the stopper 40.

  The stopper 40 is erected from the top surface 13 of the first track member 10a and faces the side surface 27b of the second moving member 20b. The stopper 40 extends from the lower end of the facing surface 43 to the longitudinal direction of the first track member 10a. And a contact portion 42 extending in the direction. The contact portion 42 extends from the lower end of the facing surface 43, thereby forming a retreat space when an elastic body 41 described later is compressed above the contact portion 42.

  An elastic body 41 that connects the opposing surface 43 and both side surfaces 27b is attached between the opposing surface 43 of the stopper 40 and both side surfaces 27b of the second moving member 20b. The elastic body 41 is preferably a coil spring. In addition, the elastic body 41 is attached to the first and second track members 10a and 10b, two in total, and a total of four elastic bodies 41 are provided for the movement of the first and second moving members 20a and 20b. On the other hand, an elastic force is applied in the compression and extension directions. That is, the elastic body 41 is made of a member that can be elastically deformed in both cases of compression and expansion and can generate a reaction force in either case. By applying a coil spring to the elastic body 41, the entire apparatus can be simply configured.

  In addition, since the elastic body 41 can generate a reaction force in both cases of compression and extension, one of the two side surfaces of the first and second moving members 20a and 20b is 1 on either side. Even if only one is provided, the function of generating restoring force can be exhibited. Therefore, only one elastic body 41 may be provided for one track member. However, in this embodiment, two elastic bodies 41 are provided for one track member, and a restoring force that is twice that of the case where only one is provided is generated.

  The elastic body 41 connects the stoppers 40 of the first track member 10a and the second moving member 20b, and further connects the stoppers 40 of the second track member 10b and the first moving member 20a. . That is, one set and the other set of two linear guide devices are provided so as to be connected to each other. Further, the elastic body 41 is provided using a displacement allowable space for allowing the moving member to allow relative displacement in the longitudinal direction of the track member, and the entire motion guide device 1 can be configured simply. Are arranged as follows. Moreover, since the elastic body 41 is attached to the both side surfaces of the first and second moving members 20a, 20b, that is, the surface without the lid body 22, it is possible to easily connect them.

  As shown in FIG. 3, the motion guide device 1 according to the present embodiment configured in this way is in the original position (FIG. 1) by the restoring force of the elastic body 41 even when displaced in the X direction and the Y direction. Can quickly return to the state shown in FIG. Further, since the elastic body 41 is disposed along the central axis in the longitudinal direction of the first and second track members 10a and 10b, the entire motion guide device 1 can be formed in a small size. The degree of freedom of installation can be increased. Furthermore, since an extra force such as a moment is not applied to the elastic body 41, the restoring force of the elastic body 41 can be fully exerted, and the risk of breakage of the elastic body 41 can be reduced.

  Moreover, in the exercise | movement guide apparatus 1 which concerns on this embodiment, since the distance of the elastic body 41 and a track member can be arrange | positioned to the minimum, an unnecessary load is not applied to a moving member. That is, when the elastic body 41 is disposed at a position away from the track member, a moment is generated with respect to the moving member, and the moving member receives an extra load. This moment increases as the distance between the elastic body 41 and the raceway member increases. On the other hand, in the motion guide apparatus 1 according to the present embodiment, the elastic body 41 is connected to the side surface of the moving member and disposed in the vicinity of the track member, so that the moment applied to the moving member by the elastic body 41 is minimized. be able to.

  Further, since the stopper 40 is attached along the central axis in the longitudinal direction of the first and second track members 10a and 10b, the abutting portion 42 moves the first and second moving members 20a and 20b. In addition to the restriction, the elastic body 41 is compressed, so that the impact on the stopper 40 can be buffered when the first and second moving members 20a, 20b are restricted by the contact portion 42.

  That is, the elastic body 41 provided with the stopper 40 also functions as a buffer member. That is, when the moving member and the track member are relatively displaced, the elastic body 41 is compressed or extended, and generates a reaction force in a direction in which the moving member is moved away from the stopper 40. Further, as the moving member approaches one of the stoppers 40, the elastic body 41 is gradually compressed or expanded to increase its reaction force. Since the input external force is canceled by this reaction force, the impact when the moving member collides with the stopper 40 can be greatly reduced as compared with the case where the elastic body 41 is not provided.

  Further, even when the elastic body 41 is compressed by the retreat space above the contact portion 42, the first and second moving members 20a and 20b, the stopper 40, and the elastic body 41 do not interfere with each other, and accordingly, the interference occurs. Damage to the elastic body 41 can be prevented.

  In addition, when the elastic body 41 is formed of a coil spring, when the coil spring is compressed to the minimum size and the adjacent coils are in contact with each other, the coil spring loses elasticity, and further compression force is applied in that state. The coil spring may be crushed and damaged. Therefore, the motion guide device 1 according to the present embodiment is provided with the length of the abutting portion 42 longer than the minimum dimension that can be compressed by the coil spring.

[Second Embodiment]
In the motion guide apparatus 1 according to the first embodiment described above, the case where the first and second moving members 20a and 20b are regulated by the contact portion 42 extending from the lower end of the stopper 40 has been described. . The motion guide apparatus 1a according to the second embodiment to be described next will explain an example having a form different from that of the first embodiment. Note that members that are the same as or similar to those in the first embodiment described above are given the same reference numerals, and descriptions thereof are omitted.

  FIG. 4 is a perspective view showing a motion guide apparatus according to the second embodiment of the present invention.

  As shown in FIG. 4, in the motion guide apparatus 1a according to the present embodiment, the contact portions 42 are attached to both side surfaces 27 of the first and second moving members 20a and 20b. The contact portion 42 in the present embodiment extends along the longitudinal direction of the second and first track members 10b, 10a and is inserted through the elastic body 41. In addition, the contact part 42 in this embodiment uses a cylindrical bar material suitably. Moreover, you may provide the contact part 42 in the opposing surface 43 of stopper 40 'similarly to 1st Embodiment.

  The stopper 40 'of the motion guide apparatus 1a according to the present embodiment includes a fitting portion 46 that can be fitted along the width direction of the first and second track members 10a and 10b. The first and second track members 10a and 10b are fitted to the part 46 and assembled. Note that the stopper 40 ′ has a flange 47 extending from the lower end along the width direction fixed to the mating part by the fastening means 51.

  In the motion guide device 1a according to the second embodiment formed in this way, the contact portion 42 is inserted through the elastic body 41, so that even when the elastic body 41 is compressed, it is guided by the braking means 44. Therefore, since it does not bend, it can be compressed appropriately, and the elastic force 41 can be prevented from being broken and the elastic body 41 can be prevented from being damaged.

  Further, the stopper 40 ′ is formed by fitting the first and second track members 10 a and 10 b to the fitting portion 46 that can be fitted along the width direction of the first and second track members 10 a and 10 b. Since it is fixed, the fixing position of the stopper 40 'is not limited to the position of the bolt hole 12 formed in the top surface 13 of the first and second track members 10a, 10b, and the first and second track members 10a. , 10b can be arbitrarily set along the longitudinal direction, and the stroke amount of the first and second moving members 20a, 20b and the elastic force of the elastic body 41 can be adjusted.

[Third Embodiment]
In the motion guide apparatus 1a according to the second embodiment described above, the case where the contact portion 42 is inserted through the elastic body 41 has been described. The motion guide apparatus 1b according to the third embodiment to be described next will explain an example having a form different from that of the second embodiment. In addition, about the member same or similar to the case of the 1st and 2nd embodiment mentioned above, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  FIG. 5 is a diagram showing a motion guide apparatus according to the third embodiment of the present invention.

  As shown in FIG. 5, the motion guide apparatus 1b according to the present embodiment further includes damping means 45 that connects both side surfaces 27 of the first and second moving members 20a and 20b and the stopper 40 '. The contact portion constitutes a part of the attenuation means 45.

  The damping means 45 includes a shaft portion 45a connected to both side surfaces 27 of the first and second moving members 20a and 20b, and a contact portion 45b into which the shaft portion 45a is inserted and connected to the stopper 40 '. It has. The contact part 45b is a cylinder combined with the shaft part 45a, and is formed in a hollow cylindrical shape. The damping means 45 can adopt a known structure as appropriate, and generates a damping force by using a resistance force generated by a fluid such as oil or air in the cylinder. The damping means 45 is disposed coaxially with the elastic body 41 by inserting the shaft portion 45 a and the contact portion 45 b through the elastic body 41. Further, similarly to the motion guide apparatus 1 according to the first embodiment, the contact portion 45b also has a function of regulating the relative movement of the first and second moving members 20a and 20b.

  Thus, since the modified example 1b of the motion guide apparatus according to the present embodiment includes the damping means 45 arranged coaxially with the elastic body 41, the first movement is attenuated by the peristalsis associated with the expansion and contraction of the elastic body 41. In addition, the second moving members 20a and 20b can be quickly returned to the original positions.

[Fourth Embodiment]
In the motion guide apparatus 1b according to the third embodiment described above, the case where a coil spring is applied as the elastic body 41 has been described. A motion guide apparatus 1c according to a fourth embodiment to be described next will explain an example having a form different from the first to third embodiments. In addition, about the member which is the same as that of the case of 1st-3rd embodiment mentioned above, or similar, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  FIG. 6 is a diagram showing a motion guide apparatus according to the fourth embodiment of the present invention.

  The motion guide apparatus 1c according to the present embodiment uses a rubber member 41a as an elastic body. The rubber member 41a is disposed and attached between the stopper 40a and the first and second moving members 20a and 20b, and from the stopper 40a side toward the first and second moving members 20a and 20b side. It is formed in a substantially trapezoidal shape so that it gradually becomes wider.

  In the motion guide apparatus 1c according to the present embodiment, the elastic body is configured as the rubber member 41a. Therefore, even when the moving member is relatively displaced with respect to the raceway member, the elastic member is compressed and stretched by the rubber member 41a. By reliably transmitting the generated repulsive force to the first and second moving members 20a and 20b, the first and second moving members 20a and 20b can be quickly returned to their original positions, and the entire apparatus can be simplified. It can be set as a simple structure.

  Note that the motion guide device 1c according to the present embodiment has a configuration in which the stopper 40a does not have the contact portion 42 unlike the motion guide device 1 according to the first embodiment. This is because, since the rubber member 41a is made of rubber, the compression strength can be set high, and therefore the possibility that the rubber member 41a is damaged by compression is low. By adopting such a configuration, the stopper 40a can be configured more simply, so that the entire apparatus can be configured in a simple manner, while contributing to the reduction of manufacturing costs.

  The present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the present invention. For example, in the present embodiment, the case where the rolling element rolling groove and the loaded rolling element rolling groove are formed in a circular arc shape has been described, but these shapes are not limited to this, and are slightly larger than the radius of curvature of the rolling element. You may form in what is called a Gothic arch shape which consists of two circular arcs of curvature radius.

  In addition to balls, cylindrical rollers may be used as the rolling elements, and the first and second track members and the first and second moving members are relatively slid without using the rolling elements. It does not matter. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

1, 1a, 1b, 1c motion guide device, 10a first track member, 10b second track member, 13 top surface, 20a first moving member, 20b second moving member, 27a, 27b side surface, 40, 40 ', 40a stopper, 41 elastic body, 42, 45b contact part, 43 opposing surface, 45 damping means.

Claims (7)

First and second track members disposed non-parallel to each other;
A first moving member assembled to be movable along the longitudinal direction of the first track member;
A second moving member coupled to the first moving member and assembled to be movable along a longitudinal direction of the second track member;
The back surfaces of the first moving member and the second moving member are coupled to each other, and the first track member, the second track member, the first moving member, and the second moving member are connected to each other. In the motion guide device configured by stacking,
The first and second track members are each provided with a stopper having opposing surfaces facing both side surfaces of the second and first moving members,
A motion guide device comprising elastic bodies that connect the side surfaces of the first and second moving members and the opposing surface, respectively. The motion guide device according to claim 1,
The motion guide device, wherein the elastic body is a spring. The motion guide apparatus according to claim 2,
Both side surfaces of the first and second moving members or one of the opposing surfaces of the stopper are provided with contact portions that are inserted through the springs and that can contact the opposing surfaces or the both side surfaces. An exercise guide device characterized by that. The motion guide device according to claim 3,
The motion guide apparatus according to claim 1, further comprising damping means arranged coaxially with the spring, wherein the contact portion constitutes a part of the damping means. The motion guide apparatus according to claim 1 or 2,
The motion guide device according to claim 1, wherein the stopper includes an abutting portion that can abut against end surfaces in the moving direction of the first and second moving members. In the exercise | movement guide apparatus of any one of Claim 1 to 5,
The motion guide device, wherein the stopper is attached to a top surface of the first and second track members facing the first and second moving members. In the exercise | movement guide apparatus of any one of Claim 1 to 5,
The motion guide device according to claim 1, wherein the stopper includes a fitting portion that can be fitted along a width direction of the first and second track members.

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