JPH04138127U - Direct-acting guide device with integrated ball screw - Google Patents

Abstract

(57) [Summary] [Purpose] The preload to be applied can be easily adjusted. Prevents variations in preload amount between different direct-acting guide devices. [Structure] A moving body (2) moving inside a linear guide rail (1) with a roughly U-shaped cross section is connected to two upper and lower moving blocks (12) (1).
3) Formed by. Left and right ball guide grooves (5A) (5B), ball return paths (8A) (8B), and reversal paths (9A) (9B) are formed in each moving block (12) (13). A spacer (14) is interposed between the upper moving block (12) and the lower moving block (13) to adjust the distance between the blocks (12) and (13).

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea is based on linear motion, which is used for linear movement of machine tool tables, for example. Regarding the shaped guide device, in more detail, it is a linear guide rail with a substantially U-shaped cross section. , a moving object that moves within the guide rail, and a moving object that moves along the guide rail. The present invention relates to a direct-acting guide device in which a ball screw for movement is integrated.

0002 In this specification, forward and backward, left and right refer to the moving direction of the moving body. .

0003

[Conventional technology]

Conventionally, as this type of linear guide device, a linear guide rail with a substantially U-shaped cross section has been used. , a moving object moving within the guide rail, and a moving object placed parallel to this within the guide rail. A ball screw shaft that is attached to The inner surface of the rising parts on both sides of the guide rail and the moving body Two rows of upper and lower ball guide grooves are formed on both sides, and these ball guides A ball outward path is formed by the groove, and a ball is formed on the inside of each ball outward path in the left and right direction on the moving body. A ball return path is formed, and the end of the ball return path and the end of the ball return path are in front and behind the moving body. A ball circulation path is formed by connecting the reversing path formed at both ends, and the ball circulation path is A plurality of balls that roll between the moving body and the guide rail are enclosed in the ball circulation path. A similar method is known (see Utility Model Application Publication No. 2-12554).

0004

[Problem that the idea aims to solve]

However, in the conventional direct-acting guide device with an integrated ball screw, the guide rail Adjustment of the preload applied to the moving body is done by adjusting the size of the balls enclosed in the ball circulation path. This is done by making changes, so the problem is that the work is time-consuming. be. In addition, when making multiple direct-acting guide devices, each direct-acting guide device There is a problem in that the amount of preload applied varies.

[0005] The purpose of this invention is to create a direct-acting guide device with an integrated ball screw that solves the above problems. It is about providing.

[0006]

[Means to solve the problem]

The ball screw-integrated direct-acting guide device based on this idea is A linear guide rail with a substantially U-shaped cross section and a moving object that moves within the guide rail. , a ball screw shaft placed parallel to the guide rail, and a ball screw shaft provided on the moving body. It also consists of a ball nut fitted around the ball screw shaft, and is connected to the guide rail. There are two rows of upper and lower buttons on the inner surface of the rising part on both the left and right sides and on both the left and right sides of the moving body. ball guide grooves are formed, and these ball guide grooves form the ball outward path. , a ball return path is formed inside the left-right direction of each ball outbound path in the moving body, and the ball The end of the forward path and the end of the return path of the ball are connected by reversing paths formed at both front and rear ends of the moving body. are connected to form a ball circulation path, and the ball circulation path of the moving object is connected to the moving object and the guide. Direct motion integrated ball screw that contains multiple balls that roll between it and the rail. In the shape guide device, The moving body is formed by two upper and lower moving blocks, and each moving block has left and right A ball guide groove, ball return path and reversal path are formed, and the upper moving block and lower A spacer is interposed between the side moving block and the distance between both blocks. This is what is being done.

[0007]

[Effect]

The moving body is formed by two upper and lower moving blocks, and each moving block has left and right A ball guide groove, ball return path and reversal path are formed, and the upper moving block and lower A spacer is interposed between the side moving block and the distance between both blocks. The amount of preload applied can be easily changed by changing the thickness of the spacer. Can be adjusted. Moreover, the dimensional accuracy of the spacer thickness is equal to the dimensional accuracy of the ball. Since it can be easily increased compared to the This prevents variations in the amount of preload applied to each direct-acting guide device even when .

[0008]

【Example】

An embodiment of this invention will be described below with reference to the drawings.

[0009] In Figures 1 to 3, the ball screw-integrated direct-acting guide device has an approximately U-shaped cross section. A linear guide rail (1), a moving object (2) that moves within the guide rail (1), and a guide rail (1), a moving object (2) that moves within the guide rail (1), and a A ball screw shaft (3) or and a ball nut provided on the movable body (2) and fitted around the ball screw shaft (3). (4) and a ball screw consisting of (4).

0010 There are two rows of upper and lower rows on the inner surface of the rising parts (1a) on both the left and right sides of the guide rail (1). Ball guide grooves (5A) (5B) are formed. on both the left and right sides of the moving object (2). Two rows of ball guides (upper and lower) corresponding to the ball guide grooves (5A) and (5B) of the guide rail (1), respectively. Id grooves (6A) (6B) are formed. Ball guide groove (5A) (5B) of guide rail (1) and the corresponding ball guide grooves (6A) (6B) of the moving body (2) allow the ball to move outward (7A). (7B) is formed. Each ball guide groove (5A) (5B) (6A) (6B) It is formed by two arcuate surfaces with a radius of curvature larger than the diameter of (11).

[0011] Inner side in the left and right direction than the left and right ball guide grooves (6A) (6B) in the moving body (2). Two rows of hole-shaped ball return paths (8A) and (8B) are formed in the upper and lower rows, respectively. Then, each ball The end of the path (7A) (7B) and the end of each ball return path (8A) (8B) are at both the front and rear ends of the moving body (2). Two upper and lower endless balls are connected by the two upper and lower reversing paths (9A) (9B) formed. Circulation paths (10A) (10B) are formed. Each ball circulation path (10A) (10B) has multiple balls. A rule (11) is included. The ball (11) hits both balls on the outbound path (7A) (7B). the guide grooves (5A) (5B) and (6A) (6B) so that they contact each other at one point. It is. Both ball guide grooves (5A) (6A) of the ball (11) on the upper ball forward path (7A) A straight line connecting the point of contact with the surface and both ball guides of the ball (11) on the lower ball outward path (7B). The straight line connecting the contact points of the grooves (5B) and (6B) to the groove surface is the left and right direction of the ball's outward path (7A) and (7B). They intersect at a predetermined angle at one point on the inside or outside.

0012 The moving body (2) is formed by two upper and lower moving blocks (12) and (13). upper side between the lower moving block (12) and the lower moving block (13). A spacer (14) is interposed to adjust the distance.

[0013] The upper moving block (12) has end cap parts (15) at both front and rear ends, and The left and right side portions (16) located between the left and right ends of the cap portion (15), and the Consists of a retainer. Ball guide grooves (6) are installed on the outer surfaces of the left and right sides (16) A) and ball return path (8A) are formed, and a reversal path (9A) is formed in the end cap part (15). has been completed. The lower moving block (13) of the moving body (2) moves the upper moving block (12) upward. They are arranged upside down, and the same parts are given the same reference numerals and their explanation will be omitted. vinegar The pacer (14) is interposed between the left and right side portions (16) of both blocks (12) and (13). . Upper moving block (12), lower moving block (13) and spacer (1) of moving body (2) 4) is removably fixed by screw means (not shown). And space By changing the thickness of the guide rail (14), it can be attached between the guide rail (1) and the moving body (2). It becomes possible to adjust the amount of preload applied in the vertical direction.

[0014] The circumferential surface of the ball screw shaft (3) has multiple threads, for example two ball rolling thread grooves (one 7A)(17B) is formed. Slightly change the pitch of both ball rolling screw grooves (17A) (17B). The shaft is inserted between the ball screw shaft (3) and the ball nut (4) by directional preload is applied.

[0015] The ball nut (4) is formed by two upper and lower nut parts (18) and (19). The upper nut part (18) is placed between the left and right side parts (16) of the upper moving block (12). and fixed to these parts (16). The lower nut part (19) is attached to the lower moving block. It is placed between the left and right side parts (16) of the lock (13) and is fixed to these parts (16). Ru. In both nut parts (18) (19), respectively, in the thread grooves (17A) (17B) of the ball screw shaft (3). Corresponding ball circulation paths (20A) (20B) are formed, and the balls are inserted into these ball circulation paths (20A) (20B). A circulator (21) is enclosed in a recirculating manner.

[0016] When the ball screw shaft (3) is rotated by a drive device (not shown), the ball nut (4) ) moves in the axial direction, and the moving body (2) moves along the guide rail (1).

[0017] In the above embodiment, each ball guide groove (5A) forming the ball outward path (7A) (7B) (5B)(6A)(6B) are two arcuate surfaces with a radius of curvature larger than the diameter of the ball (11). However, instead of this, each ball guide groove (5A) (5B) (6A) (6B) has two planes, The ball (11) is formed by one arcuate surface with a radius of curvature larger than the diameter of the ball (11). You can stay there.

[0018]

[Effect of the idea]

According to the ball screw-integrated linear guide device of this invention, as mentioned above, the spacer The amount of preload applied can be easily adjusted by changing the thickness of the Ru. Moreover, even if multiple direct-acting guide devices are made, each direct-acting guide device It is possible to prevent variations in the amount of preload applied.

[Brief explanation of drawings]

FIG. 1 is a plan view of a direct-acting guide device integrated with a ball screw according to the present invention.

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

FIG. 3 is a sectional view taken along the line III-III in FIG. 1;

[Explanation of symbols]

1 Guide rail 1a Rising part 2 Mobile object 3 Ball screw shaft 4 Ball nut 5A Ball guide groove 5B Ball guide groove 6A Ball guide groove 6B Ball guide groove 7A Ball outward route 7B Ball outward route 8A Ball return trip 8B Ball return route 9A Reverse path 9B Reverse path 10A Ball circulation path 10B Ball circulation path 11 ball 12 Upper moving block 13 Lower moving block 14 Spacer

Claims (1)

[Scope of utility model registration request] Claim 1: A linear guide rail having a substantially U-shaped cross section, a moving body moving within the guide rail, a ball screw shaft disposed within the guide rail in parallel to the guide rail, and a ball screw shaft provided on the moving body and disposed in parallel thereto. It consists of a ball nut fitted around the screw shaft, and two rows of upper and lower ball guide grooves are formed on the inner surface of the rising portion on both the left and right sides of the guide rail and on both the left and right sides of the moving body, and these ball guide grooves A ball outward path is formed, a ball return path is formed inside the left and right direction of each ball outward path in the moving body, and an end of the ball outward path and an end of the ball return path are connected by a reversal path formed at both front and rear ends of the moving body. In a linear-acting guide device with an integrated ball screw, the ball circulation path of the moving body is enclosed with a plurality of balls that roll between the moving body and the guide rail. is formed by two upper and lower moving blocks, and each moving block has left and right ball guide grooves, a ball returning path, and a reversing path. A direct-acting guide device with an integrated ball screw and an adjustable spacer.