Triangular bearing assembly

Abstract

The utility model belongs to the technical field of bearings, and particularly relates to a triangular bearing assembly which is characterized by comprising a guide rail body, a sliding sleeve, balls, an end plate and an end cover, the cross section of the guide rail body is a regular triangle, the sliding sleeve is a regular triangle annular body and is sleeved on the guide rail body, at least two adjacent surfaces of the guide rail body are symmetrically provided with grooves, the balls are arranged in the grooves, and the end plate is arranged on the guide rail body. The grooves and the grooves in the inner surface of the sliding sleeve form a roller path, the roller path is communicated with a covered channel in the sliding sleeve to form a ball circulating channel, and the turning positions of the ball circulating channel are located in the end covers at the two ends of the sliding sleeve; a connecting seat plate is arranged on the surface of the sliding sleeve; two ends of the guide rail body are connected with end plates. The utility model has the beneficial effects that the combined structure of the balls and the guide rail is used as a linear bearing, so that the friction coefficient in the moving process of a moving body can be reduced, the deformation and waist collapse of the guide rail in an overturning stress state can be effectively prevented, and the linear bearing is suitable for application occasions of various industrial machines such as precision machine tools, industrial robots and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bearing technical field, especially relate to a triangular bearing assembly. BACKGROUND

[0002] Bearing is an important part in modern mechanical equipment. Its main function is to support the mechanical moving body, reduce the friction coefficient in its movement process, and ensure its movement precision. Metal linear bearing is a kind of linear motion system produced at low cost, and the sleeve structure is used for infinite stroke and cylindrical shaft cooperation. It is widely used in the sliding parts of precision machine tools, textile machinery, food packaging machinery, printing machinery and other industrial machinery.

[0003] The utility model discloses a linear bearing and combined linear bearing with improved internal retainer, including bearing shell, ball cage and ball, six arc protrusions are evenly arranged on the outer side wall of ball cage around the axial direction, any arc protrusion is provided with annular ball movable slot, and the ball movable slot is communicated with the inner side wall and the outer side wall of ball cage. Any ball movable slot is formed with a ball limiting strip inside, and a plurality of balls are arranged in the ball movable slot. The both ends of the ball cage are provided with sealing washers, and the both ends of the bearing shell are provided with inner threads and outer threads matched with each other. The structure is used in cooperation with the cylindrical shaft. The linear bearing has the disadvantages that the linear bearing is limited by the sleeve structure, the space is narrow, and only small steel balls can be selected, so that the impact load capacity is poor, the bearing capacity is also poor, and deformation and waist collapse are easy to occur.

[0004] The utility model discloses a linear guide rail with oil brushing structure, including track, the top outer wall of track is equipped with the circular hole that distributes equally, and the both sides outer walls of track are equipped with the limit slot that distributes equally, the top outer wall of track is connected with the sliding block of sliding, and the specification of sliding block is compatible with the specification of track, and the sliding block is rectangular structure, and the top outer wall of sliding block is provided with the mounting seat, and the outer wall of oil brushing assembly is equipped with the pull hole. The linear guide rail has the disadvantages that the ball is only arranged on both sides, the supporting force is limited under the overturning stress state of the guide rail, and the guide rail is easy to be damaged. UTILITY MODEL CONTENTS

[0005] The utility model discloses a triangular bearing assembly, overcome the insufficient of prior art, adopt ball and guide rail combination structure, as linear bearing is used, reduce the friction coefficient of moving body movement process, ensure movement precision simultaneously, improve the rigidity and stability of guide rail, prevent deformation and waist collapse under the overturning stress state.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme realizes:

[0007] A triangular bearing assembly, including guide rail body, sliding sleeve, ball, end plate and end cover, the cross section of guide rail body is equilateral triangle, and sliding sleeve is equilateral annular body and is covered on guide rail body, and at least two adjacent faces of guide rail body are provided with recesses symmetrically, and ball is arranged in recess, and the recess and the recess of the inner surface of sliding sleeve form raceway, and the raceway is communicated with the hidden groove in sliding sleeve and forms ball circulation channel, and the turning of ball circulation channel is located in the end cover of the both ends of sliding sleeve, the surface of sliding sleeve is equipped with connecting seat board, and the both ends of guide rail body are connected with end plate.

[0008] Further, the recess is provided with 2-3 parallel recesses on one face of the guide rail body.

[0009] Further, the three edges of the guide rail body are chamfered or rounded 1.5-3mm.

[0010] Further, the diameter of the ball is 3.5-5mm.

[0011] Further, the end cover on the both ends of the sliding sleeve is provided with arc-shaped protrusions corresponding to the recesses on the guide rail body.

[0012] Further, the connecting seat board is connected with the moving member through the connecting piece.

[0013] Further, the end cover is provided with a grease nipple, and the oil inlet channel is communicated with the ball circulation channel.

[0014] Compared with the prior art, the utility model has the beneficial effects that:

[0015] 1) the ball and guide rail combination structure is used as linear bearing, can reduce the friction coefficient of the moving body in the moving process, ensures the motion precision, the rigidity and stability of the guide rail body with triangular section are stronger, compared with the cylindrical guide rail, can effectively prevent the deformation and collapse of the guide rail under the stress state, is applicable to the application occasions of various industrial machines such as precision machine tool and industrial robot.

[0016] 2) the supporting surface of the triangle, the ball on each face includes but is not limited to a row, can be increased according to the load, is favorable to further improve the impact load capacity and carrying capacity. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is the structure schematic view of the utility model embodiment;

[0018] Fig. 2 It is the structure schematic view of the utility model embodiment;

[0019] Fig. 3The utility model discloses an end cover structure schematic diagram of an embodiment.

[0020] In the drawing: 1 - guide rail body, 2 - sliding sleeve, 3 - ball, 4 - end plate, 5 - end cover, 6 - recess, 7 - hidden groove, 8 - turning position, 9 - connecting seat plate, 10 - arc protrusion, 11 - grease nipple. DETAILED DESCRIPTION

[0021] The technical scheme of the utility model will be described below in connection with specific embodiments, obviously, the described embodiments are some embodiments of the utility model, not all embodiments.

[0022] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in prior art, the specific embodiments needed in the description of specific embodiment or prior art will be simply introduced, obviously, the specific embodiments in the following description are some embodiments of the utility model, and other specific embodiments can also be obtained by those skilled in the art without creative labor.

[0023] The components of the embodiments of the utility model described and shown in the specific embodiments can be arranged and designed in numerous different configurations. Therefore, the following detailed description of the embodiments of the utility model provided in the specific embodiments is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model.

[0024] See Figs. 1-3 , the utility model discloses a triangular bearing assembly embodiment structure schematic drawing, including guide rail body 1, sliding sleeve 2, ball 3, end plate 4 and end cover 5, the cross section of guide rail body 1 is equilateral triangle, and sliding sleeve 2 is equilateral triangle annular cover on guide rail body 1, and recess 6 is symmetrically arranged on three adjacent surfaces of guide rail body 1, and ball 3 is arranged in recess 6, and the recess 6 and the recess of the inner surface of sliding sleeve 2 form a raceway, and the raceway is connected with hidden groove 7 in sliding sleeve 2 to form a ball circulating channel, and ball 3 is arranged in the ball circulating channel, and the turning position 8 of the ball circulating channel is located in the end cover 5 at both ends of sliding sleeve 2;The surface of sliding sleeve 2 is equipped with connecting seat plate 9, and can be connected with relevant structure;Guide rail body 1 is connected with end plate 4 at both ends, as end position, prevent sliding sleeve 2 from coming out. The arc protrusion 10 on the end cover 5 at both ends of sliding sleeve 2 corresponds to the recess 6 on guide rail body 1, as the both end position of recess 6, prevent ball 3 from coming out. The end cover 5 is equipped with grease nipple 11, and the oil inlet channel is connected with the ball circulating channel, and the lubricating effect is guaranteed.

[0025] The two grooves 6 are arranged in parallel on one face of the guide body 1, and the rotating balls in the grooves 6 form two ball tracks, so that the force between the guide body 1 and the sliding sleeve 2 is uniform. The three edges of the guide body 1 are chamfered or rounded by 1.5-3mm, preferably 2.5mm, so as to reduce the edge burrs and facilitate installation. In order to improve the impact load capacity and the carrying capacity, the diameter of the ball 3 is 3.5-5mm, preferably 4mm.

[0026] In the embodiment, when the three faces of the guide body 1 are provided with the balls 3, the two ends of the guide body 1 are fixed, and the assembly is used as a linear bearing. Different forms of moving bodies can be connected with the connecting seat plate 9 through various corresponding connecting members, and move relative to the guide body 1. Compared with the conventional cylindrical guide rail, the rigidity and stability of the guide body with a triangular cross section are stronger, especially in the overturning stress state, the guide rail will not be deformed and collapsed, and is suitable for various industrial mechanical application occasions such as precision machine tools and industrial robots.

[0027] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A triangular bearing assembly characterized by, The utility model relates to a kind of movable guide rail, including guide rail body, sliding sleeve, ball, end plate and end cap, the cross section of the guide rail body is equilateral triangle, sliding sleeve is equilateral triangle annular body and is covered on guide rail body, at least two adjacent faces on guide rail body are symmetrically provided with recess, ball is arranged in recess, the recess and the recess of sliding sleeve inner surface form raceway, the raceway is connected with the dark groove in sliding sleeve and forms ball circulation channel, the turning of ball circulation channel is located in the end cap of sliding sleeve two ends;The surface of the sliding sleeve is equipped with connecting seat plate;The end plate is connected in the two ends of the guide rail body.

2. A triangular bearing assembly according to claim 1, wherein, The recess is provided with 2-3 parallel on one face of the guide rail body.

3. A triangular bearing assembly according to claim 1, wherein, The three edges of the guide rail body are chamfered or rounded 1.5-3mm.

4. A triangular bearing assembly according to claim 1, wherein, The diameter of the ball is 3.5-5mm.

5. A triangular bearing assembly according to claim 1, wherein, The end cap on the two ends of the sliding sleeve is provided with arc-shaped protrusion corresponding to the recess on the guide rail body.

6. A triangular bearing assembly according to claim 1, wherein, The connecting seat plate is connected with the moving member through the connecting piece.

7. A triangular bearing assembly according to claim 1, wherein, The end cap is provided with a grease nipple, and an oil inlet channel is in communication with the ball circulation channel.

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