Improved slider structure for roller operation and linear guide rail having the same

Abstract

The application relates to the technical field of linear guide rails, in particular to a slider structure capable of improving roller operation and a linear guide rail with the same, which comprises a slider and a retainer, a load channel for roller rolling being formed between the slider and the retainer; a circulation part is arranged at the end of the slider, the circulation part is provided with a circulation channel communicated with the load channel; along the rolling direction of the roller, the joint surfaces between the circulation part and the slider and the joint surfaces between the circulation part and the retainer are staggered, the side wall of the circulation channel is provided with a chamfer connected with surface A and surface B, the side wall of the load channel is also provided with a chamfer connected with surface A and surface B, and the two end faces of the roller are always partially in contact with the load channel or the circulation channel. Through the staggered design of the joint surfaces, it is guaranteed that the upper and lower end faces of the roller cannot be simultaneously in the chamfered cross section, and the spatial dimension stability of the roller in the whole operation process is guaranteed.

Description

Technical Field

[0001] This application relates to the field of linear guide technology, and in particular to a slider structure for improving roller operation and a linear guide having the same. Background Technology

[0002] The rolling elements of a linear roller guide are cylindrical rollers, divided into load-bearing and unloaded circulation zones along the entire circulation path. Rollers in the load-bearing zone, constrained by the forces of the track and slider, have an angle close to the theoretically optimal 90° between their running direction and the rotation axis. However, for rollers in the unloaded zone, to ensure smooth operation and reversible circulation, the length of their circulation space is set slightly greater than the roller length (L2>L1). This can lead to uneven force distribution on the rollers as they transition between the load and unloaded zones, causing them to tilt due to changes in constraint force and circulation space. This means the angle between their running direction and the rotation axis deviates from the optimal 90°, affecting roller operation and potentially causing them to jam and malfunction. Furthermore, the circulation section is made of resin material, and its mating surface with the metal slider creates a step difference, such as... Figure 1 As shown, when the roller passes through the mating surface, its end edge is prone to colliding with the step section, resulting in stress concentration at the roller edge and roller tilting, which affects the roller's runnability.

[0003] In existing technologies, to reduce step differences, chamfers are typically added to the mating surfaces, such as... Figure 2 As shown, however, due to the large chamfers at both ends of the roller, the ball may still tip over or cause other operational problems when it passes the contact surface between the circulation section and the slider. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that when the ball passes through the joint surface between the circulation part and the slider, the sudden increase in the cross section of the circulation space due to the presence of the chamfer makes the ball prone to tilting, causing poor operation.

[0005] Therefore, the present invention provides a slider structure for improving roller operation and a linear guide having the same.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] A slider structure for improving roller operation includes,

[0008] A slider and a cage, wherein a load channel for the rollers to roll is formed between the slider and the cage;

[0009] A circulation section is provided at the end of the slider, and the circulation section is provided with a circulation channel communicating with the load channel;

[0010] Along the rolling direction of the roller, the mating surfaces between the circulation part and the slider, and between the circulation part and the cage are staggered. The sidewall of the circulation channel is provided with chamfers that connect with surfaces A and B. The sidewall of the load channel is also provided with chamfers that connect with surfaces A and B. The two end faces of the roller always have a portion in contact with the load channel or the circulation channel.

[0011] Furthermore, along the rolling direction of the roller, the mating surface between the circulation part and the slider is surface A, and the mating surface between the circulation part and the cage is surface B. The distance L4 between surface A and surface B is greater than 0.5Dw, where Dw is the diameter of the roller.

[0012] Furthermore, along the rolling direction of the roller, the length L6 of the chamfer is less than 0.5Dw.

[0013] Furthermore, along the axial direction of the roller, the width of the load groove is L1, the width of the circulation groove is L2, L2>L1, and the sidewall of the load groove facing the cage is flush with the sidewall of the circulation groove on the same side.

[0014] Furthermore, a guide surface is provided on the side wall of the circulation channel near the slider. The guide surface is set as an inclined surface. The part of the circulation channel located on the side of the guide surface away from the load channel is called the main body of the circulation channel, and its width is L2. The part located on the side of the guide surface near the load channel is called the connecting part of the circulation channel, and its width is L1.

[0015] Furthermore, the boundary of the guide surface away from the load channel is the starting point S, and the boundary closer to the load channel is the ending point F. Along the rolling direction of the roller, the distance between the ending point F and the surface A is L4.

[0016] Furthermore, along the rolling direction of the roller, the length L7 of the guide surface is ≥ 0.5Dw.

[0017] A linear guide rail includes,

[0018] Guide rail, and

[0019] As described above, in the improved roller operation slider structure, the slider slides along the length of the guide rail and engages with the guide rail, and the retainer is disposed between the slider and the guide rail.

[0020] The beneficial effect of this invention is that, through the staggered design of the two mating surfaces between the load channel and the circulation channel at both ends of the roller, this application ensures that the upper and lower end faces of the roller are not simultaneously in a chamfered section. Both ends of the roller are always partially in contact with the load channel and the circulation channel, ensuring the spatial dimensional stability of the roller throughout its operation. This prevents the circulation space section from suddenly increasing due to the chamfer, thereby avoiding roller tilting and greatly improving the stability and smoothness of the roller's operation. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the structural difference between the contact surface of the circulation section and the slider in the background art.

[0023] Figure 2 This is a schematic diagram of the chamfered joint surface between the circulation section and the slider in the background art.

[0024] Figure 3 This is a schematic diagram of the assembly relationship between the slider and the cage in this invention.

[0025] Figure 4 This is a schematic diagram of the joint surface between the circulation section and the slider in this invention.

[0026] Figure 5 This is a schematic diagram of the roller entering the load channel from the circulation channel in this invention.

[0027] In the diagram: 1. Slider; 2. Cage; 3. Circulation section; 4. Load channel; 5. Circulation channel; 6. Guide surface; 7. Chamfer. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0029] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0031] A linear guide rail with a slider structure that improves roller operation includes a guide rail and a slider 1, wherein the slider 1 slides along the length of the guide rail. (Refer to...) Figure 3 The slider 1 is equipped with a roller retainer 2. Load grooves are provided on the two side walls of the slider 1 facing the guide rail. The slider 1 is provided with a through hole. A load channel 4 is formed between the load groove and the retainer 2. When the roller rolls in the load channel 4, one end of the roller faces the slider 1 and the other end faces the retainer 2. A circulation part 3 is provided at the end of the slider 1. The circulation part 3 can be separately provided. The circulation part 3 is provided with a circulation channel 5 for connecting the load channel 4 and the through hole. The circulation channel 5 is a no-load area.

[0032] Specifically, such as Figure 4 As shown, the axial length of the roller is L, and the diameter is Dw. The mating surface between the circulation section 3 and the slider 1 is surface A, and the mating surface between the circulation section 3 and the cage 2 is surface B. Along the rolling direction of the roller, surfaces A and B are staggered, and the distance between surfaces A and B is L4 > 0.5Dw. The sidewall of the circulation channel 5 inside the circulation section 3 is provided with chamfers 7 that connect with surfaces A and B. The sidewall of the load channel 4 is also provided with chamfers 7 that connect with surfaces A and B. Along the rolling direction of the roller, the length of the chamfers 7 is less than 0.5Dw. The lengths of the multiple chamfers 7 can be the same or different. In this embodiment, the length of the chamfers 7 is L6.

[0033] Along the axial direction of the roller, the width of the load groove 4 is L1, which is slightly larger than the axial length of the roller, L. The width of the circulation groove 5 is L2, where L2 > L1. It should be noted that the sidewall of the load groove 4 facing the cage 2 is flush with the sidewall of the circulation groove 5 on the same side, thus there is no step difference between the circulation section 3 and the cage 2. A guide surface 6 is provided on the side wall of the circulation channel 5 near the slider 1. The starting point of the guide surface 6 is S, and the ending point is F. Point F is opposite to surface B. Therefore, along the rolling direction of the roller, the distance between F and surface A is L4. The length of the guide surface 6 is L7≥0.5Dw. The part of the inner side wall of the circulation channel 5 near the slider 1, located on the side of the guide surface 6 away from the load channel 4, is called the main body of the circulation channel 5 (width L2). The part of the guide surface 6 near the load channel 4 is called the connecting part of the circulation channel 5 (width L1). The guide surface 6 is set at an angle. Through the guide surface 6, towards the load channel 4, the side wall of the circulation channel 5 near the slider 1 gradually shrinks until it is flush with the side wall of the load channel 4.

[0034] In this application, the chamfered area 7 at surface B is opposite to the connecting part of the circulation channel 5, and the end point F of the guide surface 6 is opposite to surface B, thus, as Figure 5 As shown in (a), when the roller rolls from the unloaded area (circulating groove 5) to the loaded area (load groove 4), at least half of the lower end face of the roller (the end facing the cage 2) can contact the circulating groove 5 on the circulating part 3, while the upper end face of the roller has entered through the guide surface 6. At this time, the roller can be locked in the portion of the circulating groove 5 with a width of L1, thereby avoiding the roller tilting caused by the sudden increase in space due to the chamfer 7; similarly, referring to Figure 5 In the small figure (b), when the lower end face of the roller moves to the area of ​​the cage 2, half of the upper end face still remains in contact with the circulation part 3, and the roller will not tilt.

[0035] By combining the staggered design of surfaces A and B, it is ensured that the upper and lower end faces of the roller will not be in the section with chamfer 7 at the same time, thus ensuring the spatial dimensional stability of the roller throughout its operation.

[0036] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. A slider structure for improving roller operation, characterized in that, include, A slider (1) and a retainer (2) are provided, wherein a load channel (4) for the rollers to roll is formed between the slider (1) and the retainer (2); A circulation section (3) is provided at the end of the slider (1), and a circulation channel (5) communicating with the load channel (4) is provided on the circulation section (3); Along the rolling direction of the roller, the mating surfaces between the circulation part (3) and the slider (1) and between the circulation part (3) and the cage (2) are staggered. Along the rolling direction of the roller, the mating surface between the circulation part (3) and the slider (1) is surface A, and the mating surface between the circulation part (3) and the cage (2) is surface B. The side wall of the circulation channel (5) is provided with chamfers (7) that connect with surfaces A and B. The side wall of the load channel (4) is also provided with chamfers (7) that connect with surfaces A and B. The two end faces of the roller always have a portion that abuts against the load channel (4) or the circulation channel (5). The distance L4 between surfaces A and B is greater than 0.5Dw, where Dw is the diameter of the roller.

2. The slider structure for improving roller operation according to claim 1, characterized in that, Along the rolling direction of the roller, the length L6 of the chamfer (7) is less than 0.5Dw.

3. The slider structure for improving roller operation according to claim 1, characterized in that, Along the axial direction of the roller, the width of the load channel (4) is L1, the width of the circulation channel (5) is L2, L2>L1, and the sidewall of the load channel (4) facing the cage (2) is flush with the sidewall of the circulation channel (5).

4. The slider structure for improving roller operation according to claim 3, characterized in that, The circulation channel (5) has a guide surface (6) on the side wall near the slider (1). The guide surface (6) is set as an inclined surface. The part of the circulation channel (5) located on the side of the guide surface (6) away from the load channel (4) is called the main body of the circulation channel (5) with a width of L2. The part located on the side of the guide surface (6) near the load channel (4) is called the connecting part of the circulation channel (5) with a width of L1.

5. The slider structure for improving roller operation according to claim 4, characterized in that, The boundary of the guide surface (6) away from the load channel (4) is the starting point S, and the boundary of the guide surface (6) close to the load channel (4) is the ending point F. The distance between the ending point F and the surface A along the rolling direction of the roller is L4.

6. The slider structure for improving roller operation according to claim 4, characterized in that, Along the rolling direction of the roller, the length L7 of the guide surface (6) is ≥0.5Dw.

7. A linear guide rail, characterized in that, include, Guide rail, and The slider structure for improving roller operation as described in any one of claims 1-6, wherein the slider (1) slides along the length of the guide rail and is in sliding engagement with the guide rail, and the retainer (2) is disposed between the slider (1) and the guide rail.

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