TWI709697B - Rolling guide - Google Patents

Abstract

The subject of the present invention is to provide a rolling guide device, even when rolling elements are arranged without gaps in a no-load passage, the rolling elements will not be subjected to large frictional resistance and blockage in the passage, ensuring smooth rolling elements Circulation can be used to achieve smooth movement of the moving member relative to the track member.

The rolling guide device of its solution includes a rail member, and a moving member that is assembled to the rail member through a plurality of rolling elements, and has a wireless circulation path including a return path of the rolling element and a direction change path, and the movable member includes The unloaded passage member of the return passage and the direction change path, in the unloaded passage member, an elastic deformation region deformed by pressing from the rolling element forms the return passage and/or the direction change path A part of the inner wall is arranged along its length.

Description

Rolling guide

The present invention relates to a rolling guide device that freely reciprocates and guides a movable body such as a table in a linear guide portion or a curved guide portion of a table of a machine tool or various conveying devices.

Conventionally, this kind of rolling guide device includes a rail member having rolling surfaces of rolling elements formed along the longitudinal direction, and a plurality of rolling elements that roll on the rolling surface are assembled to the rail member and freely reciprocate along the rail member. Moving mobile components. The moving member is provided with an endless loop of rolling elements, whereby the moving member can move along the rail member without restriction.

In the rolling guide device disclosed in Patent Document 1, the moving member includes: a metal main body member; a plurality of circulation path assemblies installed on the main body member; and covering the circulation path assemblies and installed on the main body A pair of covers of the component. The main body member is formed with a load rolling surface facing the rolling surface of the rail member, and the rolling element rolls in a load path partitioned by the rolling surface and the load rolling surface facing each other. In addition, each circulation path assembly mounted on the main body member has a pipe portion inserted into the through hole formed in the main body member, and one end of the pipe portion is arranged and arranged A direction conversion portion at the end of the movement direction of the main body member.

A return passage of rolling elements parallel to the load passage is formed in the pipe portion, and a direction change passage connecting the return passage and the load passage is built in the direction change portion. The cover body is configured to cover the direction changing portion of the circulation path assembly, and the cover body is attached to the main body member so that the circulation path assembly body is covered by the main body with the pipe portion inserted into the through hole of the main body member. Constrained by the components, the endless loop of the rolling elements is completed.

The infinite circulation path of the rolling element is composed of: a load path in which the rolling element loads and rolls between the rail member and the moving member; the return path of the rolling element arranged in parallel with the load path; and the connection to the load path A pair of direction change paths with the ends of the return path are formed, and each direction change path changes the rolling direction of the rolling element by 180° to form a substantially semicircular shape. In addition, the return passage and the direction change passage constitute an unloaded passage in which the rolling element rolls in a state where the rolling element is released from the load, and the width of the passage is formed to be larger than the diameter of the rolling element.

Therefore, when the moving member moves along the rail member, the rolling elements in the load passage rotate while moving in the load passage, but when the relevant rolling elements are discharged from the load passage to the direction change path, they do not rotate and move by themselves. , While pushing the subsequent rolling elements continuously discharged from the load path, they travel in the direction change path and the return path. That is, in the unloaded passage formed by the return passage and a pair of direction change passages located at both ends of the return passage, the rolling elements are arranged in a state in which there is no gap along the circulation direction.

At this time, since the discharge of the rolling elements from the load passage to the unloaded passage is not completely synchronized with the entry of the rolling elements from the unloaded passage to the load passage, the length of the rolling element row in the unloaded passage is periodically repeated slightly. . In the case of arranging the above-mentioned spacers between the rolling elements, this periodic length change can be absorbed by the elastic deformation of the spacers. However, when the rolling elements are arranged without gaps in the unloaded passage without the spacers, the rolling elements bear a large The frictional resistance caused by the blocking phenomenon in the passage will hinder the smooth circulation of the rolling elements. In addition, the clogging phenomenon described above is extremely remarkable when a roller is used as the rolling element.

[Prior Technical Literature] [Patent Literature]

[Patent Document 1] JP 2013-190021 A

The present invention is developed in view of the above-mentioned problems, and its purpose is to provide a rolling guide device, even when rolling elements are arranged without gaps in a no-load passage, the rolling elements are not subjected to large frictional resistance and remain in the passage. A jam phenomenon is generated inside to ensure the smooth circulation of the rolling elements, thereby achieving smooth movement of the moving member relative to the track member.

That is, the rolling guide device of the present invention includes a rail member, a rolling surface having rolling elements along the longitudinal direction, and a moving member that is transparent A large number of rolling elements are assembled on the above-mentioned rail member and have a wireless circulation path including a return path and a direction change path of the above-mentioned rolling elements. The moving member includes: a main body member; a plurality of circulation path forming members installed on the main body member; And a pair of covers installed on the main body member to cover the circulation path forming members. In addition, the circulation path forming member is composed of a combination of a first circulation half body and a second circulation half body, and includes: a pipe portion having the return passage and inserted into the through hole of the main body member, and provided with the direction changing passage A direction change path is arranged on an end surface of the movement direction of the main body member at one end of the pipe. In addition, an elastic deformation portion that is pressed and appropriately deformed by the rolling elements in the return passage is provided at the center of the pipe portion of the circulation path forming member in the longitudinal direction, and on the other hand, is sandwiched between the longitudinal ends of the pipe portion The elastic deformation portion is formed with a pair of cylindrical fixing portions, and the direction changing portion and the pair of fixing portions are divided into the first circulation half and the second half by a plane including the center line of the direction changing path The circulation half body, on the other hand, the elastic deformation portion is divided into the first circulation half body and the second circulation half body by a plane orthogonal to a plane including the center line of the direction change path.

According to the present invention as described above, the circulation path forming member having the return path of the rolling elements and the direction change path is divided into the first circulation half and the second circulation half, and the zeros constituting the circulation path forming member The number of components is suppressed to the minimum line, and smooth circulation of rolling elements is ensured. Also, it is caused by the slight change in the length of the rolling body in the wireless loop Even if the rolling elements arranged in the wireless circulation path are subjected to a large frictional resistance, the elastic deformation portion is pressed against the rolling elements in the return path and deformed, so that the path width of the return path is expanded, thereby preventing The occurrence of blockage in the wireless circulation path ensures the smooth circulation of the rolling elements, thereby achieving smooth movement of the moving member relative to the track member.

This facilitates the formation of the direction change path with respect to the circulation path forming member, and effectively prevents the occurrence of jamming of the rolling elements in the return path. Therefore, the direction change portion and the pair of fixed portions are included in The plane of the center line of the direction change path is divided into the first half of circulation and the second half of circulation, but the elastic deformation portion is divided into the above-mentioned first half by a plane orthogonal to the plane including the center line of the direction change path One circulation half body and the second circulation half body, and only the combination of the first circulation half body and the second circulation half body may be provided with the elastic deformation portion with respect to the circulation path forming member.

1: Roller (rolling body)

2: track member

3: moving components

4: Main component

5: cover

6: Circulation path forming member

6A: The first half of the circulation

6B: The second half of the loop

7: Management Department

7c: Elastic deformation part

8: Direction conversion department

71: Support beam

72: Flat part

Fig. 1 is a perspective view showing an example of an embodiment in which the rolling guide device of the present invention is applied.

Figure 2 is a cross-sectional view taken along line II-II in Figure 1.

Fig. 3 is a perspective view showing the main body member of the rolling guide device according to the embodiment.

Fig. 4 is a perspective view showing a circulation path forming member of the rolling guide device according to the embodiment.

Fig. 5 is a perspective view showing the installation of the circulation path forming member with respect to the main body member.

Fig. 6 is an exploded perspective view of the circulation path forming member shown in Fig. 4 viewed from the side of the first half.

Fig. 7 is an exploded perspective view of the circulation path forming member shown in Fig. 4 viewed from the second half body side.

Fig. 8 is a cross-sectional view showing the arrangement state of rolling elements in the tube portion.

Fig. 9 is a schematic diagram illustrating the function of the elastic deformation zone in the tube.

Hereinafter, the rolling guide device of the present invention will be described in detail with the attached drawings.

Figures 1 and 2 show an example of an embodiment of the rolling guide device according to the present invention. The rolling guide device is composed of a rail member 2 in which the rolling surface 20 of the roller 1 as a rolling element is formed along the longitudinal direction, and is assembled to the rail member 2 through a plurality of rollers 1 and along the infinite The circulation path is constituted by the moving member 3. While the roller 1 circulates in the endless loop and rolls on the rolling surface 20 of the rail member 2, the movable member 3 can be freely moved along the longitudinal direction of the rail member 2. In addition, the rolling guide device of the present invention may use balls as the rolling elements.

The track member 2 has a rectangular cross-section, and two rolling surfaces 20 of the roller 1 are formed on both sides of the track member 2 as a whole. It forms four rolling surfaces 20. In addition, mounting holes 22 for fixing bolts are formed in the related rail member 2 at predetermined intervals along the longitudinal direction, and the rail member 2 is used when laying in a mechanical device or the like. In addition, the arrangement, the angle of inclination, and the number of the rolling surfaces 20 with respect to the rail member 2 can also be appropriately changed in accordance with the load capacity required by the moving member 3.

On the other hand, the moving member 3 includes: a main body member 4 having a guide groove for accommodating a part of the rail member 2; a pair of cover bodies 5 installed in the front and back of the moving direction of the main body member 4; and circulation The path forming member 6 is installed on the main body member 4 and covered with the cover 5 from the outside. In addition, the details of the circulation path forming member 6 will be described later.

The main body member 4 includes a horizontal portion 4 a on which a mounting surface 41 of a mechanical device or the like is formed, and a pair of leg portions 4 b orthogonal to the horizontal portion 4 a, and is arranged so as to straddle the rail member 2. The mounting surface 41 is formed in the horizontal portion 4a, and on the other hand, two load rolling surfaces 42 on which the rollers 1 roll are formed on the inside of each leg portion 4b. The rolling surface 20 of the rail member 2 and the load rolling surface 42 of the main body member 4 are opposed to each other, and constitute a load passage 43 that causes the roller 1 to roll between the main body member 4 and the rail member 2 while being loaded with a load. A return passage 44 of the roller 1 corresponding to each load rolling surface 42 is formed in parallel with the load passage 43 in each leg portion 4b. The return passage 44 is provided in the circulation passage forming member 6, and a part of the circulation passage forming member 6 is inserted into the through hole 45 formed in the main body member 4, thereby providing a return passage to the relevant main body member 4 44.

In addition, the circulation path forming member 6 constitutes a direction change path 60 that connects the load path 43 and the return path 44 along with the cover 5. One The direction change path 60 connects the two ends of each load path 43 described above and the two ends of the return path 44 corresponding thereto, thereby constructing an endless circulation path of the roller 1 inside the moving member 3. As shown in dotted lines in Figure 2, each load passage 43 is connected to the return passage 44 located diagonally downward or diagonally upward via the direction change path 60, and is constructed on both sides of the legs 4b of the main body member 4 In the endless loop of the loop, the above-mentioned direction change paths 60 cross each other.

Fig. 3 is a diagram showing a state in which the cover 5 and the circulation path forming member 6 are removed from the main body member 4. The main body member 4 is cut into half by the horizontal portion 4a, and only one leg portion 4b is shown. As understood from this figure, an upper load rolling surface 42a and a lower load rolling surface 42b are formed on the inner surface of the leg portion 4b of the main body member 4. In addition, the leg portion 4b is formed with a lower through hole 45b corresponding to the upper load rolling surface 42a and an upper through hole 45a corresponding to the lower load rolling surface 42b, and a part of the circulation path forming member 6 is inserted into this The upper through hole 45a and the lower through hole 45b constitute the return passage 44 described above.

In addition, on the end surface of the main body member 4 on which the cover 5 is attached, an inner screw hole 46 for fastening a fixing bolt penetrating the cover 5 is formed. In addition, the inner surface of the leg portion 4b is provided with a V-shaped cross-sectional locking groove 48 at an intermediate position between the upper load rolling surface 42a and the lower load rolling surface 42b, and guides the rolling element 1 in the load passage 43 The center holding member 9 (see FIG. 2) is positioned by the locking groove 48 with respect to the upper load rolling surface 42a and the lower load rolling surface 42b.

Fig. 4 is a perspective view showing the circulation path forming member 6 described above. The circulation path forming member 6 is inserted into the main body member 4 Hole 45a or 45b, the return passage pipe 7 with the return passage 44 formed inside, and the direction change portion 8 constructing the direction change path 60, the return passage pipe 7 and the direction change portion 8 are made of synthetic resin Injection molding is integrated. The entire length of the return passage tube 7 is formed to be slightly longer than the length of the through holes 45 a and 45 b formed in the main body member 4. In addition, the return passage tube 7 and the direction changing portion 8 need not be integrally formed, and they may be installed when they are installed on the main body member 4 after being separately formed.

The direction changing portion 8 has an inner direction changing path that is bent into a substantially U-shape, and the inner direction changing path is continuous with the return passage 44 formed in the return passage pipe 7. Moreover, as shown in FIG. 4, on the outer side surface of the direction changing portion 8, the inner peripheral side guide surface 60a of the outer direction changing path is formed in an arch shape. The outer direction changing path is provided to guide the roller 1 in a direction intersecting the inner direction changing path, and the inner peripheral guide surface 60a crosses the inner direction changing path 8 across the outer wall of the direction changing path 8. In addition, in order to position the circulation path forming member 6 on the main body member 4, a positioning protrusion is provided on the circulation path forming member 6 so that the positioning protrusion 66 is fitted into a position reference hole formed in the leg portion 4b of the main body member 4. 47 (see Figure 3).

Figure 5 is a perspective view showing how the circulation path forming member 6 is attached to the leg portion 4b of the main body member 4, and shows that the return path tube 7 of the circulation path forming member 6 is inserted into the penetration of the leg portion 4b. The state of the hole 45a. The return passage tube 7 is formed to be slightly longer than the length of the movement direction of the main body member 4 (the longitudinal direction of the rail member), and the return passage tube 7 is inserted into the through hole 45a to rotate in the above direction Until the replacement portion 8 comes into contact with the leg portion 4b, although not depicted in FIG. 5, the tip of the return passage tube 7 is formed to slightly protrude from the surface on the opposite side of the leg portion 4b. In this state, the inner direction changing path built in the direction changing portion 8 is connected to the lower load rolling surface 42b formed on the main body member 4, so that the inner peripheral guide surface 60a of the direction changing path is formed on the outer side of the direction changing portion 8 It is connected to the upper load rolling surface 42a of the main body member 4 mentioned above. Although Fig. 5 shows one end surface of the leg portion 4b on which the circulation path forming member 6 is installed, the end surface on the opposite side of the leg portion 4b is inserted into the lower through hole 45b of the leg portion. The return passage pipe 7 of the passage forming member 6. Thereby, a pair of circulation path forming members 6 are combined with the legs 4b sandwiched therebetween, and since the main body member 6 includes a pair of legs, a four-base circulation path forming member 6 is attached to the main body member 4.

On the other hand, the lid body 5 (see FIG. 1) is made by injection molding of synthetic resin, and is fastened to the main body member 4 by fixing bolts so as to cover the direction changing portion 8 of the circulation path forming member 6. On the inner surface of the cover 5, that is, the surface facing the main body member 4, the peripheral guide surface corresponding to the inner peripheral guide surface 60a of the circulation path forming member 6 is formed in a concave curved shape, and the cover is mounted When provided on the main body member, the outer guide surface of the cover 5 and the inner peripheral guide surface 60a of the direction changing portion 8 face each other, completing the outer direction changing path.

In addition, as described above, the four circulation path forming members 6 of the same shape and the two cover bodies 5 of the same shape are combined with the main body member 4 to complete the moving member 3, and are respectively formed with respect to the legs 4b of the main body member 4. There is an endless loop of roller 1 with two circuits.

As shown in Fig. 4, the pipe portion 7 of the circulation path forming member 6 is formed by forming the tip fixing plate 7a inserted into the through hole 45 of the main body member 4 into a cylindrical shape, and its outer diameter is relative to the inner diameter of the through hole 45 The predetermined tolerance. In addition, the pipe portion 7 also forms the same cylindrical shape as the base end fixing portion 7b connected to the direction change path 8. Thereby, the pipe portion 7 is held in the through hole 45 of the main body member 4.

On the other hand, an elastic deformation portion 7c is provided between the distal end fixing portion 7a and the base end fixing portion 7b. The above-mentioned elastic deformation portion 7c is, as shown in FIG. 6, a support beam portion 71 having a passage groove 70 of the roller 1 that rolls in an unloaded state, and a plate-shaped flat plate portion that closes the passage groove 70 of the support beam portion 71 72 constituted. The passage groove 70 provided in the support beam portion 71 is covered by the flat plate portion 72, and a return passage 44 of the roller 1 is constructed with respect to the elastic deformation portion 7c. The support beam portion 71 is held by the front end fixing portion 7a and the base end fixing portion 7b at both ends in the longitudinal direction, and the depth of the passage groove 70 formed in the support beam portion 71 is set to be larger than the diameter of the roller 1, and When the flat plate portion 72 covers the passage groove 70, the roller 1 rolls in the return passage 44 in an unloaded state. The flat plate portion 72 is not joined to the support beam portion 71, and only both ends in the longitudinal direction are held by the distal end fixing portion 7a and the base end fixing portion 7b of the pipe portion 7. Therefore, when the flat plate portion 72 is pushed outward from the inside of the passage groove 70, the flat plate portion 72 bends along the longitudinal direction of the pipe portion 7, and the return passage 44 is expanded by only that amount.

6 and 7 show exploded perspective views of the circulation path forming member 6 described above. The circulation path forming member 6 is divided into a first circulation half body 6A and a second circulation half body 6B, and the first circulation half body 6A and the second circulation half body 6A are combined In the half body 6B, the return passage 44 is formed inside the pipe portion 7 of the circulation path forming member 6, and an inner direction changing path 61 is formed inside the direction changing portion 8. The circulation path forming member 6 is divided into the first circulation half by a plane including the center line of the inner direction conversion path 61 in the direction conversion path 8, the front end fixing portion 7a and the base end fixing portion 7b of the pipe portion 7 The body 6A and the second circulation half body 6B, in these parts, the first circulation half body 6A and the second circulation half body 6B are formed into substantially target shapes.

On the other hand, the elastic deformation portion 7c of the tube portion 7 is divided into the above-mentioned section by a plane orthogonal to the plane including the center line of the inner direction changing path 61, that is, a plane orthogonal to the dividing plane of the direction changing path 8 The first circulation half 6A and the above-mentioned second circulation half 6B. In addition, the flat plate portion 72 is formed in the first circulation half body 6A, and the support beam portion 71 is formed in the second circulation half body 6B. Therefore, in the first circulation half body 6A, the flat plate portion 72 connects the front end fixing portion 7a and the base end fixing portion 7b, and the second circulation half body 6B uses the supporting beam portion 71 to connect the front end fixing portion 7a and The above-mentioned base end fixing portion 7b.

FIG. 8 shows the elastic deformation portion 7c inside the through hole 45 of the main body member 4. As shown in FIG. When the roller 1 circulates in the infinite circulation path, the roller 1 itself does not roll and moves, but is pushed and rolled by the subsequent roller 1 continuously discharged from the load passage 43. Therefore, when the rollers 1 are arranged continuously in the wireless circulation path, the rollers 1 are arranged in a zigzag state by pressing each other in the unloaded path, and there is a possibility that the roller 1 will jam.

Regarding this point, the flat plate portion 72 only holds both ends in the longitudinal direction at the distal end fixing portion 7a and the base end fixing portion 7b of the pipe portion 7, and There is a gap between the flat plate portion 72 and the inner peripheral surface of the through hole 45 of the main body member 4. Therefore, the flat plate portion 72 becomes easy to deform near the center portion in the longitudinal direction, and the deformation corresponds to the amount of deformation during deformation. The passage width of the return passage 44 is expanded. Therefore, as shown in Fig. 9, when the rollers 1 rolling in the return passage 44 strongly push each other so that the rollers 1 are arranged in a zigzag state in the return passage 44, the rollers 1 oppose each other. A pressing force is generated in the flat plate portion 72, and as a result, the flat plate portion 72 is elastically deformed. Thereby, the passage width of the return passage 44 is expanded, the frictional resistance between the rollers 1 is reduced, and it is possible to prevent the occurrence of clogging of the roller 1 in the return passage 44.

As explained above, in the rolling guide device of the present invention, when the rollers 1 are arranged without gaps in the wireless circulation path, the rollers 1 entering and leaving the load path 43 are not caused by the rollers, so that the rollers are subjected to large friction. The resistance causes a blockage in the return passage 44 to ensure the smooth circulation of the roller 1 and thereby achieve smooth movement of the moving member 3 relative to the rail slide 2.

In addition, the circulation path forming member 6 is configured such that the direction of the dividing surface of the first circulation half body 6A and the second circulation half body 6B is 90 degrees different in the elastic deformation portion 7c of the pipe portion 7 and other parts, Therefore, the formation of the direction change path with respect to the circulation path forming member is not only easy, but also can effectively prevent the occurrence of clogging of the rolling elements in the return path.

Furthermore, although the present invention is applied to the rolling guide device using rollers as rolling elements in the above-mentioned embodiment, the present invention can also be used as rolling The body uses ball rolling guide device.

1‧‧‧Roller (rolling element)

7c‧‧‧Elastic Deformation

44‧‧‧Return Path

45‧‧‧through hole

70‧‧‧Access slot

71‧‧‧Support beam

72‧‧‧Plate Department

Claims (2)

A rolling guide device includes a rail member, a rolling surface having rolling elements along the longitudinal direction, and a moving member, which is assembled to the rail member through a plurality of rolling elements, and has a wireless path including a return path and a direction change path for the rolling elements. The circulation path, the moving member, includes: a main body member; a plurality of circulation path forming members installed on the main body member; and a pair of cover bodies installed on the main body member to cover the circulation path forming members, the circulation path The forming member is composed of a combination of a first circulation half body and a second circulation half body, and includes: a pipe having the return passage and inserted into the through hole of the main body member, and a pipe having the direction change path and provided in the pipe One end is arranged at the end face of the movement direction of the main body member, and an elastic deformation part that is pressed by the rolling elements in the return path and deformed appropriately is provided at the center of the longitudinal direction of the pipe portion of the circulation path forming member On the other hand, a pair of cylindrical fixing portions are formed at both ends of the tube in the longitudinal direction sandwiching the elastic deformation portion, and the direction changing portion and the pair of fixing portions are formed to include the center of the direction changing path The plane of the line is divided into the first circulation half and the second circulation half. On the other hand, the elastic deformation portion is divided into the first circulation by a plane orthogonal to the plane including the center line of the direction change path Half body and the above-mentioned second circulation half body. The rolling guide device described in claim 1, wherein the elastic deformation portion includes a support beam portion formed with a passage groove deeper than the diameter of the rolling element and provided in the second circulation half body, and A flat plate part that covers the passage groove of the support beam part and is freely joined and separated with respect to the support beam part, and is provided in the first circulation half body between the flat plate part and the inner peripheral surface of the through hole of the main body member A gap that allows the elastic deformation of the flat plate portion is provided.

Images