CN204878324U - Linear guide device - Google Patents

Abstract

The utility model relates to a linear guide device, its characterized in that, the device have the guiding groove that the clamp was equipped with the distance piece and formed between cylindrical roller adjacent each other, this guiding groove along the arm of cylindrical roller's circulation direction guide distance piece on the slider. Make the width of the groove width ratio arm of this guiding groove wide to the groove width degree of the groove width ratio of the guiding groove of messenger in the orientation conversion route region guiding groove in the linear motion region is wide, and in the R chamfer portion that is equipped with on the both ends of cylindrical roller's circulation orientation of arm.

Description

Linear guide device

technical field

The utility model relates to a linear guide rail device used, for example, in the field of industrial machinery and the like.

Background technique

In recent years, there is a linear guide device that includes a guide rail extending in a linear direction and a slider that straddles the guide rail so as to be relatively movable in the linear direction. On both sides of the guide rail in the width direction, 2 rows are formed on each side, and a total of 4 rows of rolling element raceways extending in a straight line are formed. On the inner sides of the two sleeves of the slider body of the slider, respectively A rolling-element raceway corresponding to the above-mentioned rolling-element raceway is formed.

However, since cylindrical rollers are used as the rolling elements moving in the rolling element raceways, there is a concern that the moving cylindrical rollers 6 may wobble in the axial direction, that is, so-called deflection, thereby deteriorating operability.

In view of this, spacers are interposed between adjacent cylindrical rollers, thereby preventing direct contact between the cylindrical rollers and suppressing the above-mentioned deflection, thereby enabling smooth movement of the slider 2 , and seek to reduce noise during movement.

In the conventional linear guideway device, the groove width of the guide groove, the area where the cylindrical rollers move linearly, and the area where the direction change path is set are all set to the same width. If the groove width of the guide groove is large, the arm portion of the spacer and the guide groove will interfere in the direction switching path area.

Therefore, conventionally, in the direction changing path region, the groove width of the guide groove is set to a width that does not interfere with the arm portion, and this width is used as the groove width of the guide groove in the linear motion region and the direction changing path region. However, in this case, the groove width of the guide groove in the linear motion region becomes too wide compared to an ideal state, and the gap dimension between the arm portion of the spacer and the guide groove becomes too large in the linear motion region.

In this case, since the spacer and the cylindrical rollers are moved by being pushed by the rear cylindrical rollers in the endless loop raceway, if the gap dimension between the arm portion of the spacer and the guide groove is too large in the linear motion region, If the diameter is too large, bending motion will occur on the spacer, and the dimension between the roller cores of the adjacent cylindrical rollers will greatly change, which will adversely affect the operability.

Utility model content

The utility model provides a linear guide rail device, which prevents the arm of the spacer from interfering with the inner peripheral wall of the guide groove in the direction conversion path area, so that the rollers can roll in the state of being in close contact with the main body of the spacer, thereby By preventing the roller gap from fluctuating in the direction changing path region, vibration can be suppressed to ensure stable operation, and the life of the spacer can be extended.

In order to solve the above problems, the utility model provides a linear guide rail device, which has: a guide rail extending in a linear direction, and the guide rail has rolling body raceways extending in a linear direction at both ends; a slider, which has a a rolling body raceway corresponding to the rolling body raceway of the guide rail; and a plurality of cylindrical rollers as rolling bodies inserted between the guide rail and the rolling body raceway of the slider, the The linear guide device is characterized by having a spacer including: a spacer main body interposed between the adjacent cylindrical rollers; and at least one end surface facing the axial direction of the cylindrical rollers. An arm part configured and integrally provided with the spacer main body, the slider has: a slider main body having a rolling body passage penetrating in a linear direction; There is a curved direction switching path that communicates with the rolling body passage between the channels, and the pair of end caps are fixed on both ends of the slider body in the linear direction, and guide grooves are provided. When the cylindrical roller When the roller circulates between the two rolling element raceways, the direction change path and the rolling element passage, the guide groove guides the arm of the spacer along the circulation direction of the cylindrical roller. portion, the groove width of the guide groove is made wider than the width of the arm portion, and the groove width of the guide groove in the region of the direction switching path is made wider than in the region where the cylindrical rollers perform linear motion. The groove width of the guide groove is wide.

In addition, in the linear guide device described above, it is preferable that both end portions of the arm portion facing the circulation direction of the cylindrical rollers are chamfered.

In addition, in the linear guide device described above, preferably, the chamfer of the arm portion is an R chamfer.

The effect of utility model

According to the linear guide device, by preventing the arm portion of the spacer from interfering with the inner peripheral wall of the guide groove in the direction switching path area, the rollers can be made to roll in a state of being in close contact with the spacer main body, thereby preventing the rollers from being spaced in the direction. Changes in the switching path region can suppress vibration to ensure stable operation, and can also extend the life of the spacer.

Description of drawings

FIG. 1 is a partially cutaway view illustrating an example of an embodiment of the present invention, that is, an example of a linear guide device.

2 is a diagram showing a state in which a spacer is interposed between adjacent cylindrical rollers in a direction changing path region of a linear guide device as an example of an embodiment of the present invention.

FIG. 3 is a diagram for explaining a movement locus of a spacer in a roller raceway of a linear guide device as an example of an embodiment of the present invention.

Explanation of reference signs

1 rail

2 sliders

2A slider body

3 rolling element raceway (rail side)

5 rolling element raceway (slider side)

6 Cylindrical rollers

8a rolling element passage

9 end caps

10 Direction Conversion Paths

30 spacers

32 arms

34 guide groove (linear motion area)

35 guide slots (direction switching path area)

Detailed ways

As shown in Fig. 1 and Fig. 2, the linear guide rail device has: a guide rail 1 extending in a linear direction; On both sides of the width direction of the guide rail 1, two rows are formed on each side, and a total of four rows of rolling element raceways 3 extending along a straight line are formed on each side. Rolling body raceways 5 corresponding to the rolling body raceways 3 are respectively formed on the inner side.

Between the two rolling element raceways 3, 5, a plurality of cylindrical rollers 6 as rolling elements are loaded freely, and the slider 2 can be moved along the linear direction on the guide rail 1 through the rolling of these cylindrical rollers 6. relatively mobile.

Accordingly, a hole 7 penetrating in the linear direction is also formed in the sleeve portion 4 of the slider main body 2A, and a circulation pipe whose interior is a passage (rolling element passage) 8a of the cylindrical roller 6 is fitted into the hole 7. 8, and on both ends of the linear direction of the slider main body 2A, a pair of end covers 9 as rolling element circulation components are respectively fixed via screws or the like, and the above two rolling element raceways 3, 5 are formed on the end covers 9. The circular arc-shaped direction changing path 10 (refer to FIG. 3 ) communicated with the above-mentioned rolling element passage 8a, thereby forming the endless loop raceway of the cylindrical roller 6.

However, when a plurality of cylindrical rollers 6 in infinite circulation rotate in the same direction around the roller axis, when the adjacent cylindrical rollers 6 come into contact with each other, the direction of the roller velocity at the contact portion The directions are opposite to each other, and the force generated thereby hinders smooth rolling of the cylindrical rollers 6 .

In addition, cylindrical rollers 6 are used as the rolling elements, thereby improving rigidity and load capacity compared with the case of using balls. Conversely, spacers 30 are interposed between adjacent cylindrical rollers 6 . This prevents the cylindrical rollers 6 from being wobbled in the axial direction during the movement, that is, so-called deflection, which would degrade the operability.

[Example]

FIG. 3 is a diagram showing the movement track of the arm portion 32 of the spacer 30 in the raceway of the cylindrical roller 6. In the figure, -1, -2, and -3 after the reference numerals of the cylindrical roller 6 represent For the movement of the cylindrical roller 6, A represents the front and B represents the rear. That is, a combination of cylindrical roller 6-1A (front) and cylindrical roller 6-1B (rear), a combination of cylindrical roller 6-2A (front) and cylindrical roller 6-2B (rear), and a cylindrical roller A combination of a sub 6-3A (front) and a cylindrical roller 6-3B (rear), and a spacer 30 is interposed between the front and rear cylindrical rollers 6 . Also, when the arm portion 32 of the spacer 30 moves from the guide groove 34 in the linear motion region to the guide groove 35 in the direction switching path region, if the center of the cylindrical roller 6 on the front side (indicated by A) in the moving direction moves from When the cross-section g at the connecting position between the direction-changing path region and the linear motion region passes, the arm portion 32 starts to incline. That is, the guide groove 35 in the direction-changing path area is formed as a starting point from the intersection point P which is the intersection point between the section g and the line along the linear inner wall surface outside the guide groove 34 in the rectilinear motion area, In this case, when the center of the cylindrical roller 6 on the front side (indicated by A) of the direction of motion passes through the section g At this time, the arm portion 32 of the spacer 30 gradually enters the inner side from the arc R0, and the centers of the front and rear cylindrical rollers 6 enter together into the direction switching path area, and then changes to a certain shape, which is changed to In the figure, R' (outer inner wall shape of the guide groove 35) reaches an arc. Therefore, the position where the shape of the guide grooves 34, 35 starts to change is the position L in the linear motion region in the outer inner wall surface, and the inner inner wall surface starts to change from the position of the section b of the linear motion region, and enters to Then, within the direction changing path region, it changes to a constant arc shape like Ri (inner wall shape of the guide groove 35 ) in the figure.

In addition, chamfering may be provided on both end portions of the arm portion 32 facing the circulation direction of the cylindrical roller 6 . In addition, the chamfer of the arm portion 32 may be an R chamfer.

By providing the guide groove 35 in the direction changing path area as described above, the arm portion of the spacer can be prevented from interfering with the inner peripheral wall of the guide groove in the direction changing path area, and the roller can be made to closely contact with the spacer main body. Rolling in the state prevents the distance between the rollers from fluctuating in the direction changing path area, thereby, according to the linear guide device, vibration can be suppressed to ensure stable operation, and the life of the spacer can be extended.

Claims (3)

1. a linear guide rail device, it has: the guide rail linearly extended, and described guide rail has the rolling element raceway linearly extended at two end part; Slide block, it has the rolling element raceway corresponding with the described rolling element raceway of this guide rail; With the multiple cylindrical rollers as rolling element, it is inserted between described guide rail and the described rolling element raceway of described slide block, and the feature of this linear guide rail device is,

Have spacer element, it has: be installed in the spacer element main body between described cylindrical roller adjacent one another are; And configure and the arm be wholely set with described spacer element main body in the mode of at least one end face of the axis in the face of this cylindrical roller,

Described slide block has: slider body, and it has the rolling element path linearly run through; With a pair end cap, its have by between described two rolling element raceways with the forniciform direction transduction pathway of described rolling element communication, and this pair of end lid is fixed in the both ends of the surface of the rectilinear direction of described slider body,

And be provided with steering channel, when described cylindrical roller between described two rolling element raceways, described direction transduction pathway and described rolling element path Inner eycle time, described steering channel guides the described arm of described spacer element along the loop direction of described cylindrical roller,

Make the well width of described steering channel wider than the width of described arm, and it is wide to make the well width of the described steering channel in the region of described direction transduction pathway carry out the well width of this steering channel in the region of straight line motion than described cylindrical roller.

2. linear guide rail device according to claim 1, is characterized in that, the two end part of the loop direction towards described cylindrical roller of described arm are applied with chamfering.

3. linear guide rail device according to claim 2, is characterized in that, the chamfering of described arm is R chamfered section.