Sliding block structure for improving roller operation and linear guide rail with sliding block structure

Abstract

The invention relates to the technical field of linear guide rails, in particular to a sliding block structure for improving roller operation and a linear guide rail with the sliding block structure, the sliding block structure comprises a sliding block and a retainer, and a load channel for a roller to roll is formed between the sliding block and the retainer; the circulating part is arranged at the end part of the sliding block; a circulating channel communicated with the load channel is formed in the circulating part; in the rolling direction of the roller, the combination face between the circulation part and the sliding block and the combination face between the circulation part and the retainer are arranged in a staggered mode, chamfers connected with the face A and the face B are arranged on the side wall of the circulation channel, and chamfers connected with the face A and the face B are also arranged on the side wall of the load channel. Part of the two end faces of the rollers abut against the load channels or the circulation channels all the time. Through the staggered design of the joint surfaces, the upper and lower end faces of the roller are not positioned on the chamfered cross section at the same time, and the spatial size stability of the roller in the whole operation process is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of linear guide rails, and in particular to a slider structure for improving roller operation and a linear guide rail having the same. Background Art

[0002] The rolling elements of the roller linear guide are cylindrical rollers, which are divided into rollers in the load area and rollers in the no-load circulation area along the entire circulation path. Among them, the rollers in the load area are constrained by the force of the track and the slider, and the angle between their running direction and the rotation axis is close to the theoretical optimal angle of 90°. However, in order to ensure the smoothness of their operation and the return circulation of the rollers in the no-load area, the length of their circulation space will be set slightly larger than the roller length (L2>L1); however, when the rollers transition back and forth between the load and no-load area interface, due to the changes in the constraint force and the size of the circulation space, the rollers are unevenly stressed and prone to tilting, that is, the angle between their running direction and the rotation axis will deviate from the optimal angle of 90°, thereby affecting the operation of the rollers, and in severe cases, the rollers will be stuck and unable to operate. In addition, the circulation part is a resin material component, and a step difference will be formed on the mating surface with the metal slider, such as Figure 1 As shown in the figure, when the roller passes through the joint surface, its end edge is likely to collide with the step portion, causing stress concentration at the roller edge and causing the roller to tilt, affecting the roller's runnability.

[0003] In the prior art, in order to reduce the step difference, chamfers are usually set at the joint surface, such as Figure 2 As shown, however, due to the large chamfers at both ends of the roller, adverse operating conditions such as tipping will still occur when the ball passes through the joint surface between the circulation part 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 cross-section of the circulation space suddenly increases due to the existence of the chamfer, which makes the roller easily tilted and causes poor operation.

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

[0006] The technical solution adopted by the present invention to solve its technical problem is: A slider structure for improving roller operation, comprising: A slider and a cage, wherein a load channel for rolling rollers is formed between the slider and the cage; a circulation portion, the circulation portion being arranged at an end portion of the slider and provided with a circulation channel communicating with the load channel; Along the rolling direction of the roller, the mating surfaces between the circulation part and the slider, and the mating surfaces between the circulation part and the retaining frame are arranged alternately, the side walls of the circulation channel are provided with chamfers that connect with surface A and surface B, and the side walls of the load channel are also provided with chamfers that connect with surface A and surface B. There are always parts of the two end faces of the roller that abut against the load channel or the circulation channel.

[0007] Furthermore, along the rolling direction of the roller, the bonding surface between the circulation part and the slider is surface A, and the bonding surface between the circulation part and the retaining frame 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.

[0008] Furthermore, along the rolling direction of the roller, the length L6 of the chamfer is less than 0.5Dw.

[0009] Furthermore, along the axial direction of the roller, the width of the load channel is L1, the width of the circulation channel is L2, L2>L1, and the side wall of the load channel facing the retaining frame is flush with the side wall of the circulation channel on the same side.

[0010] Furthermore, a guide surface is provided on the side wall of the circulation channel close to the slider, and 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 part of the circulation channel, and its width is L2. The part located on the side of the guide surface close to the load channel is called the connecting part of the circulation channel, and its width is L1.

[0011] Furthermore, the boundary of the guide surface away from the load channel is the starting point S, and the boundary close to the load channel is the end point F. Along the rolling direction of the roller, the distance between the end point F and the surface A is L4.

[0012] Furthermore, along the rolling direction of the roller, the length of the guide surface L7 is ≥ 0.5Dw.

[0013] A linear guide rail comprising: rails, and The slider structure for improving roller operation as described above, wherein the slider slides with the guide rail along the length direction of the guide rail, and the retaining frame is arranged between the slider and the guide rail. The beneficial effect of the present invention is that, through the staggered design of the two joint surfaces between the load channel and the circulation channel at both ends of the roller, the present application ensures that the upper and lower end faces of the roller will not be in the chamfered section at the same time. There are always parts of the roller at both ends that abut against the load channel and the circulation channel, which ensures the spatial dimensional stability of the roller during the entire operation process, and does not cause the circulation space cross-section to suddenly increase due to the chamfer, thereby avoiding the tilt of the roller and greatly improving the stability and smoothness of the roller's operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below with reference to the accompanying drawings and examples.

[0015] Figure 1 It is a structural diagram of the step difference of the joint surface between the circulation part and the slider in the background technology.

[0016] Figure 2 It is a structural diagram of the chamfered joint surface between the circulation part and the slider in the background technology.

[0017] Figure 3 It is a structural schematic diagram of the assembly relationship between the slider and the retaining frame in the present invention.

[0018] Figure 4 It is a structural schematic diagram of the joint surface between the circulation part and the slider in the present invention.

[0019] Figure 5 It is a schematic diagram of the roller entering the load channel from the circulation channel in the present invention.

[0020] In the figure: 1. Slider; 2. Cage; 3. Circulation portion; 4. Load channel; 5. Circulation channel; 6. Guide surface; 7. Chamfer. DETAILED DESCRIPTION

[0021] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0023] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0024] A linear guide rail with a slider structure for improving roller operation comprises a guide rail and a slider 1, wherein the slider 1 is slidably engaged with the guide rail along the length direction of the guide rail. Figure 3 The slider 1 is provided with a roller cage 2. Load grooves are provided on the 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 cage 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 cage 2. A circulation portion 3 is provided at the end of the slider 1. The circulation portion 3 can be provided in a separate part. The circulation portion 3 is provided with a circulation channel 5 for connecting the load channel 4 with the through hole. The circulation channel 5 is a load-free area.

[0025] Specifically, such as Figure 4 As shown, the roller has an axial length of L and a diameter of Dw. The bonding surface between the circulation section 3 and the slider 1 is surface A, and the bonding surface between the circulation section 3 and the retaining frame 2 is surface B. Along the rolling direction of the roller, surfaces A and B are arranged alternately, and the spacing L4 between surfaces A and B is greater than 0.5Dw. The side walls of the circulation channel 5 in the circulation section 3 are provided with chamfers 7 that connect with surfaces A and B. The side walls of the load channel 4 are also provided with chamfers 7 that connect with surfaces A and B. Along the rolling direction of the roller, the length of chamfer 7 is less than 0.5Dw. The lengths of multiple chamfers 7 can be the same or different. In this embodiment, the length of chamfer 7 is L6.

[0026] Along the roller's axial direction, the width of the load channel 4 is L1, which is slightly larger than the roller's axial length L. The width of the circulation channel 5 is L2, with L2 > L1. It should be noted that the sidewall of the load channel 4 facing the retainer 2 is flush with the sidewall of the circulation channel 5 on the same side, resulting in a zero step difference between the circulation portion 3 and the retainer 2. A guide surface 6 is provided on the side wall of the circulation channel 5 close to the slider 1. The starting point of the guide surface 6 is S and the end point is F. Point F is opposite to the surface B. Therefore, along the rolling direction of the roller, the distance between F and the surface A is L4; the length L7 of the guide surface 6 is ≥0.5Dw. The part of the inner side wall of the circulation channel 5 close to the slider 1, which is located on the side of the guide surface 6 away from the load channel 4, is called the main part of the circulation channel 5 (with a width of L2), and the part of the guide surface 6 close to the load channel 4 is called the connecting part of the circulation channel 5 (with a width of L1). The guide surface 6 is arranged at an angle. Through the guide surface 6, in the direction of the load channel 4, the side wall of the circulation channel 5 close to the slider 1 gradually shrinks to be flush with the side wall of the load channel 4.

[0027] In the present application, the chamfered corner 7 at the surface B is opposite to the connecting portion of the circulation channel 5, and the end point F of the guide surface 6 is opposite to the surface B, so that Figure 5 As shown in (a) in the figure, when the roller rolls from the no-load area (circulation channel 5) to the load area (load channel 4), at least half of the lower end face of the roller (the end facing the retainer 2) can contact the circulation channel 5 on the circulation part 3, and at the same time, the upper end face of the roller has entered through the guide surface 6. At this time, the roller can be stuck in the part of the circulation channel 5 with a width of L1, thereby avoiding the roller tilting caused by the sudden increase in space due to the chamfer 7; similarly, refer to Figure 5 In the small figure (b), when the lower end face of the roller moves to the retaining frame 2 area, half of the upper end face still remains in contact with the circulation part 3, and the roller does not tilt.

[0028] The staggered design of the joint surfaces A and B ensures that the upper and lower end faces of the roller will not be in the cross section with the chamfer 7 at the same time, thereby ensuring the spatial dimensional stability of the roller during the entire operation process.

[0029] With the above-described preferred embodiments of the present invention as a guide, and with reference to the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical spirit of this invention. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A slider structure for improving roller operation, characterized in that: include, A slider (1) and a retaining frame (2), wherein a load channel (4) for rollers to roll is formed between the slider (1) and the retaining frame (2); A circulation portion (3), the circulation portion (3) being arranged at an end portion of the slider (1), and the circulation portion (3) being provided with a circulation channel (5) communicating with the load channel (4); Along the rolling direction of the roller, the joint surfaces between the circulation part (3) and the slider (1) and the joint surfaces between the circulation part (3) and the retaining frame (2) are arranged alternately. The side wall of the circulation channel (5) is provided with a chamfer (7) connected with the surface A and the surface B. The side wall of the load channel (4) is also provided with a chamfer (7) connected with the surface A and the surface B. The two end faces of the roller always have a portion in contact with the load channel (4) or the circulation channel (5).

2. The slider structure for improving roller movement according to claim 1, characterized in that: Along the rolling direction of the roller, the joining surface between the circulation part (3) and the slider (1) is surface A, and the joining surface between the circulation part (3) and the retaining frame (2) 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.

3. The slider structure for improving roller movement 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.

4. The slider structure for improving roller movement 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 side wall of the load channel (4) facing the retaining frame (2) is flush with the side wall of the circulation channel (5) on the same side.

5. The slider structure for improving roller movement according to claim 4, characterized in that: A guide surface (6) is provided on the side wall of the circulation channel (5) close to the slider (1), and the guide surface (6) is set as an inclined surface. The portion of the circulation channel (5) located on the side of the guide surface (6) away from the load channel (4) is called the main part of the circulation channel (5), and its width is L2. The portion of the guide surface (6) located on the side close to the load channel (4) is called the connecting part of the circulation channel (5), and its width is L1.

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

7. The slider structure for improving roller movement according to claim 5, characterized in that: Along the rolling direction of the roller, the length L7 of the guide surface (6) is ≥ 0.5Dw.

8. A linear guide rail, characterized in that: include, rails, and According to the slider structure for improving roller operation as described in any one of claims 1 to 7, the slider (1) is slidably engaged with the guide rail along the length direction of the guide rail, and the retaining frame (2) is arranged between the slider (1) and the guide rail.

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