JPS62233517A - Linear guide motion mechanism - Google Patents

Abstract

PURPOSE:To simplify the structure while to improve the enclosing performance and the assembling accuracy by placing rolling members only between the outside of the supporting sections corresponding respectively to both sides of a moving side member and projections from a parallel raceway at the outside thereof. CONSTITUTION:A supporting section 3 is supported by a parallel raceway 10 through rolling members 5 against a load of a moving side member 1 in all directions to cause a linear motion of the moving side member 1 along the parallel raceway 10. Since sealing section 17 is provided only at one side face with a short overall length and a bolt hole 12 is made at the outside of the seal section 17, the sealing is not obstructed by the bolt hole 12 thus providing a good enclosing performance. While since rolling members 5 are placed only between the outside of the supporting sections 3 corresponding respectively to the opposite sides of the moving side member 1 and the projections 11 from the parallel raceway 10 at the outside thereof, the structure is simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a linear guide movement mechanism used in various machine tools, precision measuring devices, and the like.

(Prior Art) Linear motion ball bearings have recently been used in linear guide motion mechanisms used in table feed mechanisms and the like in various machine tools, precision measuring devices, and the like. For example, as shown in FIG. 4(a), the linear motion ball bearing a is composed of a stationary side orbit and a moving side bearing body C having a substantially U-shaped cross section and surrounding the orbit. A large number of balls e are supported in an internal circulation path d of the bearing body C so as to be able to circulate and move freely, and are configured to be able to project an appropriate distance from both sides, and are supported by coming into contact with both sides of the raceway. It is something. When such a linear motion ball bearing a is sealed to prevent foreign matter such as dust from entering into the inside, the sealing part is separated by an end face seal g and a bottom face seal h. As shown in the figure, the top and both sides of the raceway are covered. Furthermore, when configuring a linear guide motion mechanism that movably supports a wide table or the like using such a linear motion ball bearing a,
Conventionally, as shown in FIG. 4(c), a pair of linear motion ball bearings a is formed corresponding to both sides of a table or the like. That is, an appropriate number of bearing bodies C are attached to the lower portions of both sides of a movable member i such as a table, and each raceway is attached to a stationary member j such as a bed by means of bolts. Note that the reference numeral indicates a driving means such as a ball screw for driving the moving member i.

(Problems to be Solved by the Invention) The conventional linear guide movement mechanism has the above-mentioned through and orbit.
Since linear motion ball bearings a consisting of a bearing body C that envelops the linear motion ball bearings a are provided on both sides of a motion side member i such as a table, a large space is required structurally, and linear motion ball bearings Since the entire length of the seal part (a) for preventing foreign matter from entering is long, there are problems in that the resistance due to the seal is large and it is difficult to seal the bolt hole (m).

(Means for Solving the Problems) The present invention aims to solve the above-mentioned conventional problems, that is, the present invention has the object of solving the above-mentioned problems of the conventional art. , a support part having a groove formed on the outside thereof, and a number of rolling elements each having a circulation path inside the support part configured to be able to circulate and move freely can be supported by protruding a suitable distance on each of the inclined surfaces on both sides of the groove. At the same time, the fixed side member has a
The gist of the present invention is to configure parallel tracks in which protrusions are formed corresponding to the outside of each of the support portions and can freely contact and support the rolling elements. A detailed explanation will be given below based on FIGS. 1 to 3 corresponding to the embodiment.

Reference numeral 1 designates a motion-side member such as a table, which constitutes support portions 3 having grooves 2 formed on the outside corresponding to both sides separated by an appropriate distance. (Hereinafter, the constituent elements on both sides are indicated by the same reference numerals.) In the illustrated example, the support parts 3 on both sides are constructed as an integral support member 4, which can be freely attached to the movement side member 1. By attaching this support member 4 to the movement side member 1, support parts 3 are formed on both sides of the movement side member 1. 1, or may be configured such that the supporting parts 3 on both sides are individually attached to the movement side member 1. Corresponding to each of the inclined surfaces 6 on both sides of the groove 2,
A circulation path 7 is formed inside the support portion 3 in which a large number of rolling elements 5 such as balls can be circulated and moved, and the circulation path 7 can support the rolling elements 5 by protruding an appropriate distance on the inclined surface 6. Configure. For this reason, the inclined surface 6 is provided with a slit portion 8 that can project and support the rolling element 5 over an appropriate distance in the front-rear direction in the figure. Next, reference numeral 9 denotes a fixed side member such as a bed, and a parallel track 10 is formed on this fixed side member 9 corresponding to the outer side of each of the support parts 3 on both sides, and this parallel track 10 is formed on the fixed side member 9. A protrusion 11 that can freely contact and support the moving body 5 is formed. This parallel track 10 is fixed to the fixed side member 9 by bolts 13 through bolt holes 12 provided outside the protrusions 11. Reference numerals 14, 15, and 16 denote a top seal, a bottom seal, and an end seal, respectively, which form a seal portion 17 on only one side as shown in FIG. It is possible to prevent foreign matter such as dust from entering the interior 5.

Reference numerals 18 denote openings with lids 19 for the circulation path 7 of the rolling elements 5, which are formed on the movable side member 1 side and the stationary side member 9 side of the support member 4, respectively.

The linear guide movement mechanism of the present invention is constructed as described above,
By configuring the driving means 20 of the movement side member 1 in an appropriate position, the movement side member 1 can be driven. In the illustrated example, the support member 4 is provided with a ball screw as the driving means 20, but the driving means 20 may be a hydraulic cylinder device, a pneumatic cylinder device, etc. as appropriate, and the device method is also limited to a fixed method. In addition to the method of providing the supporting member 4 or the moving member 1 itself, there are also methods such as interposing an appropriate alignment mechanism, etc.
It is appropriate.

(Function) In the above configuration, the supporting portion 3 is supported by the parallel track 10 via the rolling elements 5 against loads in all directions of the moving member 1.
As a result, the moving member 1 can be linearly moved along the parallel track 10 by the rolling elements 5 smoothly and with high precision.

In such a case, the present invention allows the above-mentioned passage and seal portion 17 to be provided on only one side, and its overall length is shorter than that of the prior art, so there is less resistance due to the seal, and the parallel track 10 is placed on the outside of the seal portion 17. Since the bolt hole 12 is provided to attach the bolt to the fixed side member 9, the seal is not hindered by the bolt hole 12, and the sealing performance is better than that of the conventional one.

Furthermore, the present invention has a structure in which the rolling elements 5 are interposed only between the outer side of the support part 3 corresponding to both sides of the motion side member 1 and the protrusion 11 of the parallel track 10 on the outer side, so the structure is simple. Therefore, it is easy to install and can be constructed compactly.

Particularly, the above-mentioned through-hole and support parts 3 on both sides are configured as an integrated support member 4 so as to be freely attached to the movable side member 1, and the movable side member 1 side and the stationary side member 9 of the support member 4 are configured. By configuring an opening 18 with a cover 19 for the circulation path 7 of the rolling element 5 on each side, the rolling element 5 can be easily inserted into the circulation path 7 during assembly, and maintenance can also be facilitated. Furthermore, by integrally configuring the driving means 20 such as a ball screw with this support member 4, the entire structure can be made more compact, and assembly precision can be improved, thereby preventing local overloads and It is possible to prevent an increase in sliding resistance, etc. and reduce the occurrence of trouble, and also to supply oil or grease to the rolling elements 5, the circulation path γ, and the drive means 20 by using a common common structure formed as appropriate on the support member 4. Oil supply path (not shown)
Therefore, manufacturing and maintenance can be performed easily.

(Effects of the Invention) The present invention has a configuration in which the rolling elements are interposed only between the outer side of the support portion corresponding to both sides of the moving side member and the protrusion of the parallel track on the outer side. The structure is simple and easy to install, it can be constructed compactly, and the total length of the seal part can be shortened, so there is less resistance due to the seal, and it is possible to connect the parallel tracks to the fixed side member. This has the effect that the bolt holes for mounting on the holder do not affect the seal, resulting in good sealing performance.

In particular, the supporting parts on both sides are constructed as an integral support member so as to be freely attached to the moving member, and a circulation path for the rolling elements is provided on each of the moving member side and the stationary member side of the support member. By configuring nine openings with lids, it is easy to insert the rolling elements into the circulation path during assembly, and maintenance is also easy.Furthermore, a driving means such as a ball screw is integrally formed in this support member. By doing so, the entire structure can be made more compact and the assembly precision can be improved.
This has the advantage that oil and the like can be supplied to the circulation path and the drive means with a simple configuration.

[Brief explanation of drawings]

Figures 1 to 3 correspond to embodiments of the present invention, where Figure 1 is a cross-sectional explanatory diagram of the overall configuration, Figure 2 (a) is an enlarged view of the main part of Figure 1, and Figure 2 (b) is an explanatory cross-sectional view taken along the line X-X of Fig. 2 (a), Fig. 3 is an explanatory drawing showing the cool part, and Fig. 4
Figures (a) = (b) and (c) are explanatory cross-sectional views of a conventional example. Reference numeral 1...Moving side member, 2...Groove, 3...Supporting part, 4...Supporting member, 5...Rolling element, 6...Slope, 7...Circulation path, 8... Slit portion, 9... Fixed side member, 10... Parallel track, 11... Projection, 12...
...Bolt hole, 13...Bolt, 14...Top seal, 15...Bottom seal, 16...End seal, 1
7... Seal portion, 18... Opening, 19... Lid, 20... Drive means. Applicant: Kazuya Marose.

Claims (2)

[Claims] (1) A support part is formed with a groove formed on the outside corresponding to both sides of the movement side member separated by an appropriate distance, and the internal circulation of the support part is formed on each of the inclined surfaces on both sides of the groove. A large number of rolling elements configured to be able to circulate freely in a path can be freely supported by projecting a suitable distance, and the rolling elements can be supported in contact with the fixed side member corresponding to the outside of each of the supporting parts on both sides. A linear guide motion mechanism characterized by having a parallel track formed with ridges. (2) The support portions on both sides are configured as an integrated support member so as to be freely attached to the movable side member, and a circulation path for the rolling elements is provided on each of the movable side member side and the stationary side member side of the support member. The linear guide movement mechanism according to claim 1, characterized in that an opening with a lid is configured for the linear guide movement mechanism.