JPS628429Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a linear sliding bearing constructed by incorporating balls into a circulation groove between two precision press-molded raceway cases via a guide plate having tongues.

By using the linear sliding bearing of this invention in combination with a dedicated slide rail, lightweight, compact, and nimble linear movement can be obtained, so it can be used in copiers, tool cabinets, cabinets of various electronic devices, movable seats, and vending machines. Suitable for sliding parts such as sliding covers and curtain walls.

The conventional linear sliding bearing was previously filed by the same inventor as the present inventor, and its structure consists of mutually parallel linear portions 1 and 1 as shown in FIGS. 1 and 2. At least one or more endless tracks 2 having a
Notched windows 4, 4 are provided in the linear parts 1, 1 facing outward, and both ends 5, 5 of the linear parts 1, 1 are lower than the protruding ball surface and formed in a U-shape. Concave load rolling tracks 8, 8 for balls 7, 7... are recessed on both inner surfaces of the slide rail 6, and these concave load rolling tracks 8, 8 are fitted into the ball surfaces protruding from the notched windows 4, 4. Along the endless tracks 2, 2, the balls 7, 7...
This is because the slide rail 6 is made slidable on the track case 3 while rolling. (Mr. Kimiaki
(Refer to Publication No. 54-31260) However, the balls of the linear sliding bearing move forward while rolling between the track case and the slide rail, and as they move from the load area to the no-load area, due to reasons such as collision between the balls. However, it has the disadvantage that it generates noise and the ball cannot be scooped up smoothly in the tangential direction.

The technical problem of the present invention is to provide a guide plate with tongues to smoothly guide the loaded ball from the loaded area to the no-load area and to scoop up the ball smoothly in the tangential direction. be.

The structure or technical means of the present invention for solving the above problems is as follows.

A recess for a loaded ball and a recess for an unloaded ball are symmetrically formed on the surfaces of the left and right plates, and a large number of balls are inserted between the left and right plates to fit into the slide rail, and the loaded rolling concave track of the slide rail. In a linear sliding bearing that slides along the left and right plates, the guide plate fitted between the left and right plates has guide rails formed above and below the guide bridge in the center, and tongues at the front and rear ends of the guide bridge. a curved surface for ball circulation formed in one piece, and the curved surface is aligned with a circulation recess formed at the front and rear of the left and right plates, and the left and right plates are sandwiched between the guide plates. A bearing for linear sliding is characterized in that a raceway case is formed by integrally fixing the bearings by appropriate means. With the above-mentioned technical means, when the linear sliding bearing is used in combination with a dedicated slide rail, the tongue piece of the guide plate inside the bearing protrudes from the lower side of the tip of the direction changing U groove of the track case, so that the slide rail The gap between the slide rail and the ball becomes small, allowing the ball rolling on the slide rail to be scooped up in the tangential direction.

Furthermore, since the outer circumference of the ball's trajectory is determined by the inner circumference of the ball guide plate, it is possible to guide the ball over the entire circumference. Therefore, the circulation of the balls reduces noise caused by collisions between the balls due to the meandering motion when changing direction from the loaded area to the unloaded area, as well as the reverberation inside the track case, resulting in less noise, especially indoors. Suitable for mobile devices such as office machines.

In addition, since there are no collisions between balls, collisions between the track case and the balls, and collisions between the balls and the slide rail, it is possible to prevent the occurrence of impressions on various parts.
This will further extend the life of the bearings.

Furthermore, by inserting the guide plate, the rows of balls between the left and right plates can roll while the circumferences of the balls are guided, so that they can run smoothly.

An embodiment of the present invention will be described below based on the drawings.

Reference numerals 10 and 11 denote left and right plates made of nitrided steel plates, and on the surfaces of the plates 10 and 11, a recess 12 for a loaded ball and a recess 13 for an unloaded ball are formed symmetrically. The ball is formed to such an extent that the ball does not fall out of the load ball groove formed when the plates 10 and 11 are abutted and fixed.

14, 14 are through holes for rivets for abutting and fixing the left and right plates 10, 11; and 15 are through holes for fixing the mounting plate to the track case.

Reference numeral 16 denotes a guide plate made of a nitrided steel plate, and the guide plate 16 has guide rails 19, 2 that guide the no-load balls 17, 17, . . . up and down.
0 is formed in the center, and at the front and rear of the guide bridge 18, ball circulation curved surfaces 22, 22, . . . having tongues 21, 21, .

23, 23... is a loaded ball, 24, 24...
A through hole is inserted between the left and right plates 10 and 11 so that they are integrally abutted and fixed, and the left and right plates 10 and 11 are fixed to the guide plate 16 via rivets to complete the track case.

Reference numeral 25 denotes a slide rail having a required length, and a track case to which a mounting plate is fixed via a washer is fitted into the slide rail 25 for use.

The linear sliding bearing constructed as described above is fitted into raceway grooves formed on both sides of a dedicated slide rail, and performs infinite linear motion.

The rows of loaded balls in the track grooves of the track case and slide rail smoothly ascend or descend in the tangential direction while being guided by the tongues of the guide plate, thereby preventing collisions between the balls.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional side view of a conventionally known linear sliding bearing, Fig. 2 is a sectional view taken along line A-A' in Fig. 1, and Fig. 3 is a state in which one plate is removed from the track case of the present invention. 4 is a side view showing the 3rd
FIG. 5 is an exploded perspective view of the linear sliding bearing of the present invention. 10, 11... plate, 12, 13... recess, 16... guide plate, 21... tongue piece.

Claims (1)

[Scope of utility model registration request] A loaded ball recess 12 and an unloaded ball recess 13 are formed symmetrically on the surfaces of the left and right plates 10 and 11, and are inserted into the slide rail 25 through a large number of balls 23 between the left and right plates 10 and 11. In the linear sliding bearing that slides along the load rolling concave track of the slide rail 25, the guide plate 16 fitted between the left and right plates 10 and 11 has a central guide bridge 18.
Guide rails 19, 20 are formed on the upper and lower sides of the guide bridge 18, and curved surfaces 22, 22 for ball circulation are provided at the front and rear ends of the guide bridge 18, and tongue pieces 21, 21... are formed at the tips thereof. Side 2
2, 22, and the curved surfaces 22, 22 coincide with the circulation recesses formed in the front and rear of the left and right plates 10, 11, and the left and right plates 10, 11 are provided with appropriate means with the guide plate 16 in between. A linear sliding bearing characterized by having a raceway case formed by integrally fixing the bearing.