JPH0581765B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is used for linear sliding bearing units used, for example, in linear guides of machine tools, industrial robots, etc. The present invention relates to a stopper device that prevents sudden movement.

(Prior Art) As a conventional stopper device for this type of linear sliding bearing unit, there is one shown in FIGS. 19 to 21, for example.
(See Publication No. 8432). That is, 100 indicates a linear sliding bearing unit, and the track base 10
1 through the ball 102 to the bearing body 103
is slidably held. Stopper body 1
04 is engaged and fixed at any position on the track base 101 to restrict movement of the bearing body 103.

This stopper body 104 has a positioning protrusion 10 that locks into a locking groove 105 provided on the track 101.
The flange portion 10 is provided with a flange portion 6 to take charge of the thrust load (load in the longitudinal direction of the wayway 101) and is closely fitted into the ball rolling groove 108 of the wayway 101.
7 was provided to take on a moment load (a load in the direction of rotation with respect to the longitudinal direction of the wayway 101), thereby increasing the engagement force with the wayway 101.

(Problem to be Solved by the Invention) However, in the case of the above-mentioned prior art, although the engagement force between the stopper body 104 and the track base 101 is increased, the flange portions 107, 107 are tightly fitted into the ball rolling groove 108. Therefore, the flange portion 10 of the stopper body 104 is damaged by the impact when the bearing body 103 collides with the bearing body 103.
7, 107 came off from the ball rolling grooves 108, 108, and the stopper body 104 sometimes fell off from the track 101.

Further, even though the stopper main body 104 can be attached to any location on the track base 101, it is necessary to provide the locking groove 105 in the track base 101, which limits the mounting position. Furthermore, the locking groove 10
The processing in step 5 is also troublesome and increases the cost.

The present invention has been made in order to solve the above-mentioned problems of the prior art, and is a stopper device for a linear sliding bearing unit that can increase the engagement force of the stopper body with the track base and has no restrictions on the mounting position. Our goal is to provide the following.

(Means for Solving the Problems) In order to achieve the above object, in the present invention, a stopper body is provided separately from the bearing body on a track that slidably holds the bearing body via rolling elements. In a stopper device for a linear sliding bearing unit that engages and fixes the bearing body and restricts movement of the bearing body by the stopper body, a pair of hooks that are caught in recesses provided on both sides of the track base are provided on both sides of the stopper body. At the same time, a screw hole is provided in the center of the stopper body, and the tip of a screw member screwed into the screw hole presses the track base, and the reaction force of the pressing force of the screw member causes the hook portion to It is characterized in that the engagement force with the recessed portion is increased.

It is preferable that the recessed portion utilizes a rolling element rolling groove.

(Function) In the stopper device for a linear sliding bearing unit having the above configuration, first, the hook portions of the stopper body are hooked in the recesses provided on both sides of the track base. Next, when the screw member screwed into the screw hole in the center of the stopper body is tightened, the tip of the screw member presses the track base, and the reaction force of this pressing force is applied to the center of the stopper body through the screw member. Acts in the direction of pulling away from the track. This force creates a bending moment that causes the hook to bite into the recess.
The engagement force between the hook part and the recessed part is increased and the hook part and the recessed part are firmly fixed.

Also, if the rolling element rolling groove is used as the recess,
There is no need to provide a special recess on the side of the track, making it highly versatile.

(Example) The present invention will be explained below based on the illustrated example. In FIGS. 1 to 6 showing a stopper device for a linear sliding bearing unit according to an embodiment of the present invention, 1 indicates a stopper body, which is engaged and fixed to a track 11 of a linear sliding bearing unit 10. be done.

The linear sliding bearing unit 10 consists of a track 11 and a bearing main body 12, and the bearing main body 12 is slidably held on the track 11 via balls 13 as rolling elements. One ball rolling groove 14, 14 is provided on each side of the track 11. In this example, both side surfaces of the track 11 are tapered surfaces that are inclined such that the distance between them narrows upward, and ball rolling grooves 14, 14 are provided in these tapered surfaces 15, 15. The ball rolling grooves 14, 14 are circular arc grooves having an arcuate cross section, but they may also have a gossic arch shape.

On the other hand, the bearing body 12 is a block body with a substantially U-shaped cross section, and has a central recess 16 into which the track 11 fits.
Skirt portions 17, 17 are provided on the left and right sides of the skirt. Ball rolling grooves 14, 1 provided in the track 11 on the inner surfaces of the skirt portions 17, 17.
Ball rolling grooves 18, 18 corresponding to 4 are provided, and each ball rolling groove 14, 18, 14, 18
A ball 13... is interposed between them. In addition, ball relief holes 1 are provided in the solid portions of the skirt portions 17, 17.
9 and 19 are provided to allow the balls 13 to circulate endlessly through end caps 20 and 20 provided at both ends of the bearing body 12.

The stopper body 1 is a member having a substantially C-shaped cross section,
A pair of hook portions 2, 2 are provided on both side edges of the track 11, which are hooked onto ball rolling grooves 14, 14 provided on both side surfaces of the track base 11. The stopper main body 1 has spring elasticity, and the hook portions 2, 2 are hooked on the ball rolling grooves 14, 14 by the elasticity thereof.

On the other hand, a screw hole 4 is provided in the center part 3 of the stopper body 1, and a bolt 5 as a screw member is screwed into this screw hole 4, so that the bolt tip 6 comes into contact with the upper surface of the track base 11. There is. Then, by tightening the bolts 5, the way base 11
The top surface is pressed with the bolt tip 6, and the reaction force pushes up the center portion 3 of the stopper body 1 in a direction that separates it from the top surface of the track 11, and the ball rolling groove 14,
The engaging force of the hook portions 2, 2 hooked on the hook 14 is increased.

The number of screw holes 4 is not limited to one;
They may be provided at two locations as shown in FIG. 8 and FIG. 8, or may be provided at two or more locations.

In this embodiment, the shape of the hook parts 2, 2 is such that the side edge of the plate material is bent into a semicircular shape, and the edge part of the end surface is in contact with the inner periphery of the ball rolling groove 14, 1 vertebra. It's getting old. The shape of the hook portions 2, 2 is not limited to being bent into a round shape, but may be bent into a U-shape or a dogleg shape, and the edges of the end faces may be rounded so as to be in close contact with the ball rolling grooves 14, 14. In short, any shape that can be caught in the ball rolling grooves 14, 14 is sufficient.

In the stopper device for a linear sliding bearing unit having the above configuration, the stopper main body 1 can be attached to the track 11 by pushing the hook portions 2, 2 of the stopper main body 1 along the side surface of the track 11. The balls are temporarily engaged with the ball rolling grooves 14, 14 by their spring force. Next, the bolt 5 is screwed into the screw hole 4 of the stopper body 1, and the bolt tip 6 is pressed against the upper surface of the track base 11. The reaction force of this pressing force is transmitted to the center portion 3 of the stopper body 1 through the bolt 5, and a force in the direction of pushing upward is applied to the center portion 3 of the stopper body 1. This force generates a bending moment in the stopper body 1 in the direction of narrowing the distance between the hook parts 2, 2, that is, in the direction of causing the hook parts 2, 2 to bite into the ball rolling grooves 14, 14, and The engagement force with the ball rolling grooves 14, 14 is increased. Due to this boosting action, the stopper main body 1 is firmly fixed to the track base 11.

Therefore, even if the impact when the bearing body 12 collides with the stopper body 1 is large, the engagement force of the hook parts 2, 2 that are engaged with the ball rolling grooves 14, 14 is large, so that the stopper body 1
It will never come off.

Further, since there is no need to perform any processing for the stopper on the track base 11, the effort of processing can be saved and the mounting position can be set completely arbitrarily.

In this embodiment, the case where one ball rolling groove 14, 14 is provided on both sides of the track 11 has been explained as an example, but two ball rolling grooves 14, 14 are provided as shown in FIGS. 9 to 13. The same can be applied to a linear sliding bearing unit provided with a total of four ball rolling grooves.

Among these, the linear sliding bearing unit shown in FIGS.
In this case, the hook portions 2, 2 of the stopper body 1 are hooked on the ball rolling grooves 14b, 14b on the lower side of the jetty 21.

On the other hand, the linear sliding bearing unit shown in FIG.
ball rolling grooves 14c, 14d are provided on the inner surfaces of the concave grooves 22, 22, and in this case, the hook portions 2,
All you have to do is multiply by 2.

In addition, in the linear sliding bearing unit shown in FIG. 13, both sides of the track 11 are flat, and two ball rolling grooves 14, 14 are provided vertically in parallel. , the hook portions 2, 2 may be hooked onto either of the lower ball rolling grooves 14, 14.

In addition, without hooking the hook portions 2, 2 of the stopper body 1 to the ball rolling grooves 14, 14 of the way base 11, for example, the jetty 2 shown in FIGS.
recess 23 provided on the lower side of 1 or the 17th
Even if the hook portion 2 is hooked into the groove 22 shown in the figure, the same effect as that of the present invention can be obtained.

Further, as shown in FIG. 18, when the side surface of the track base 11 is a tapered surface, providing a notch 24 allows the hook portions 2, 2 to be stopped more deeply.

Such recesses 23, grooves 22, or notches 24 can be formed at the same time when the wayway 11 is drawn out, and there is no need to process them again in the post-process after the wayway 11 is formed, so processing is easy. It is.

In the above embodiment, a linear sliding bearing unit using balls 13 as the rolling elements was explained as an example, but a bearing unit using colloid as the rolling elements is also explained by attaching the hook part of the stopper main body to the roller rolling groove. All you have to do is hook it.

(Effects of the Invention) The present invention has the above-described configuration and operation, and the engagement force of the hook portion of the stopper body that is hooked on the recesses provided on both sides of the way base is applied to the way base by a screw member screwed into the stopper body. Press
Since the reaction force of the pressing force is used to double the force, the stopper body can be firmly fixed to the track base, and even if the bearing body violently collides with the stopper body, the stopper body will not fall off. It can be prevented.

In addition, the stopper body is fixed by the tightening force of the screw member, and there is no need to provide a locking groove for positioning the stopper body as in the conventional case, so there are no restrictions on the mounting position, and you can freely set the stopper body. Can be installed in any position.

Furthermore, there is no need to perform conventional groove machining on the track, and costs can be reduced.

Furthermore, if the hook portion of the stopper body is hooked on the rolling element rolling groove, it can be used in various types of linear sliding bearing units, increasing versatility.

[Brief explanation of the drawing]

FIG. 1 is a front view of a stopper device for a linear sliding bearing unit according to an embodiment of the present invention, FIG. 2 is a partially cutaway front view of the device in FIG. 1, and FIG. 3 is a side view of FIG. 2. , Figure 4 is a plan view of Figure 2, and Figure 5 is a plan view of Figure 2.
The figures are a plan view of the stopper main body in Fig. 1, Fig. 6 is a sectional view taken along the - line in Fig. 5, Figs. 7 and 8 are longitudinal sectional views and plan views of other embodiments of the stopper main body, and Fig. 9 18 are partially cutaway front views illustrating another example of a linear sliding bearing unit to which the stopper device of the present invention is applied, and FIGS. 19 to 21 are a stopper of a conventional linear sliding bearing unit. 19 is a side view, FIG. 20 is a front view of main parts, and FIG. 21 is a partially cutaway front view. Explanation of symbols, 1... Stopper body, 2... Hook part, 3... Center part, 4... Screw hole, 5... Bolt (threaded member), 6... Bolt tip, 10...
Linear sliding bearing unit, 11... track base, 12... bearing body, 13... ball (rolling element), 14... ball rolling groove (recess).

Claims (1)

[Scope of Claims] 1. A stopper body is engaged and fixed separately from the bearing body to a track that slidably holds the bearing body via rolling elements, and the movement of the bearing body is prevented by the stopper body. In a stopper device for a linear sliding bearing unit to be regulated, a pair of hooks are provided on both side edges of the stopper body to be caught in recesses provided on both sides of the track base, and a screw hole is provided in the center of the stopper body, The track base is pressed by the tip of the screw member screwed into the screw hole, and the engagement force with the recess of the hook portion is doubled by the reaction force of the pressing force of the screw member. A stopper device for linear sliding bearing units. 2. The stopper device for a linear sliding bearing unit according to claim 1, wherein the recess is a rolling element rolling groove.