Multi-stage linkage extended range linear guide pair

Abstract

This application discloses a multi-stage linkage extended range linear slide rail pair, including a long slide rail, two transmission plates, and two short slide rails. The two transmission plates are arranged side by side on the same side of the long slide rail, and are respectively close to both ends along the length direction of the long slide rail. The two short slide rails are correspondingly arranged on the sides of the two transmission plates away from the long slide rail. The transmission plates have a through-type transmission gear at a position close to the center of the length direction. Rollers are respectively provided on both sides of the transmission plates. The long slide rail has a first rack at both ends that meshes with the transmission gear and extends along the length direction. The two short slide rails have a second rack at a position close to their inner ends that meshes with the transmission gear and extends along the length direction. The long slide rail and the short slide rails are respectively provided with guide grooves that cooperate with the rollers on the corresponding side. This enables bidirectional multi-stage linkage extended range, and the overall structure is relatively more compact and occupies less space.

Description

Technical Field

[0001] This utility model relates to the technical field of slide rail pair equipment, and in particular to a multi-stage linkage extended range linear slide rail pair. Background Technology

[0002] An extender slide rail is a linear guide rail that can extend its stroke length, enabling a longer stroke than the physical length of the slide rail itself within a limited space.

[0003] In existing range extender slides, a typical configuration consists of a fixed rail, an intermediate rail, and a sliding block. Its operation is similar to the extension of a telescope. Specifically, the sliding block moves along the intermediate rail. When it reaches the end of the intermediate rail, it pulls the intermediate rail out from the fixed rail. Thus, the total travel distance is approximately equal to the length of the intermediate rail plus the effective length of the fixed rail, allowing the range to far exceed the slide's closed length, thereby extending its travel. However, this type of range extender slide can only achieve unilateral range extension. When unilateral range extension is required, two identical range extender slides need to be positioned opposite each other in the sliding direction, resulting in a bulky overall structure that occupies a large amount of space. Utility Model Content

[0004] This application provides a multi-stage linkage extended range linear guide pair, which can realize bidirectional multi-stage linkage extended range, and the overall structure is relatively more compact and occupies less space.

[0005] This application provides a multi-stage linkage extended range linear slide rail pair, including a long slide rail, two transmission plates and two short slide rails. The two transmission plates are arranged side by side on the same side of the long slide rail and are respectively close to both ends along the length direction of the long slide rail. The two short slide rails are correspondingly arranged on the side of the two transmission plates away from the long slide rail. The transmission plate has a through-type transmission gear at a position near the center of its length. Rollers are provided on both sides of the transmission plate. The long slide rail has first racks at both ends that mesh with the transmission gear and extend along the length. The two short slide rails have second racks at their inner ends that mesh with the transmission gear and extend along the length. The long slide rail and the short slide rail each have guide grooves that cooperate with the rollers on their corresponding sides.

[0006] In one possible implementation, the transmission plate is I-shaped, with U-shaped grooves symmetrically arranged on both sides. The rollers are located at the bottom of the U-shaped grooves on both sides, and the transmission gear is horizontally mounted on the upper wall of the U-shaped groove. The first rack and the second rack are detachably mounted on the top of the long slide rail and the short slide rail, respectively.

[0007] In one possible implementation, the roller is a concave roller, and the upper and lower walls of the guide groove are symmetrically provided with protrusions that cooperate with the groove of the roller.

[0008] In one possible implementation, the two sides of the transmission plate are defined as a first side and a second side, wherein the first side is close to the long slide rail; The bottom of the short slide rail is provided with first blocks at both ends in the length direction. The lower wall of the U-shaped groove is provided with two second blocks at intervals near the outer end. The second blocks on the second side cooperate with the first blocks, and the two second blocks on the second side are located between the first blocks at both ends.

[0009] In one possible implementation, the long slide rail has a symmetrical structure in the length direction, and the long slide rail is divided into a first part and a second part at the center position in the length direction of the long slide rail; The first part has two third blocks spaced apart near the outer end. The third blocks cooperate with the second blocks on the first side. The distance between the two third blocks is greater than the distance between the two second blocks on the first side. The two second blocks on the first side are located between the two third blocks.

[0010] In one possible implementation, a plurality of rollers are spaced apart along the length direction on the second side, and the number of rollers arranged at the outer end of the second side is greater than the number of rollers arranged at the inner end of the second side.

[0011] In one possible implementation, multiple rollers are spaced apart along the length direction on the first side and are respectively close to the inner ends of the two transmission plates.

[0012] Beneficial effects: Compared with the prior art, the multi-stage linkage extended range linear slide rail pair provided in this application has a transmission plate and a short slide rail arranged in parallel on one side of the long slide rail. The transmission plate meshes with the long slide rail and the short slide rail on both sides through transmission gears and rollers, respectively, which can realize multi-stage linkage extended range at both ends of the length direction. At the same time, the overall structure of the slide rail pair is more compact and occupies less space.

[0013] These and other objects, features and advantages of this utility model will be fully realized through the following detailed description. Attached Figure Description

[0014] Figure 1 A three-dimensional structural schematic diagram of the multi-stage linkage extended range linear guide pair of this application is shown.

[0015] Figure 2The exploded view of the multi-stage linkage extended linear guide pair of this application is shown.

[0016] Figure 3 The exploded rear view diagram of the multi-stage linkage extended linear guide rail pair of this application is shown.

[0017] Figure 4 A partial structural schematic diagram of the multi-stage linkage extended linear guide pair of this application is shown. Detailed Implementation

[0018] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the present invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0019] Those skilled in the art should understand that, in the disclosure of this specification, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, the above terms should not be construed as limitations on this utility model.

[0020] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0021] refer to Figures 1 to 4 This application provides a multi-stage linkage extended range linear slide rail pair, including a long slide rail 10, two transmission plates 20 and two short slide rails 30, wherein the two transmission plates 20 are arranged side by side on the same side of the long slide rail 10 and are respectively close to both ends along the length direction of the long slide rail 10, and the two short slide rails 30 are correspondingly arranged on the side of the two transmission plates 20 away from the long slide rail 10.

[0022] The transmission plate 20 has a through-type transmission gear 21 at a position near its center along its length, meaning the transmission gear 21 protrudes from both sides of the transmission plate 20. Furthermore, rollers 22 are provided on both sides of the transmission plate 20. Correspondingly, the long slide rail 10 has first racks 11 at both ends that mesh with the transmission gears 21 and extend along its length. The two short slide rails 30 each have second racks 31 at their inner ends that mesh with the transmission gears 21 and extend along their length. Additionally, the long slide rail 10 and the short slide rails 30 each have guide grooves 101 that cooperate with the rollers 22 on their corresponding sides.

[0023] During use, the long slide rail 10 is fixed. When the transmission gear 21 rotates, based on the meshing relationship between the first rack 11 and the transmission gear 21 and the meshing relationship between the second rack 31 and the transmission gear 21, the transmission plate 20 and the short slide rail 30 that cooperate with the transmission gear 21 will move synchronously along the length direction, protruding out of the long slide rail 10 to increase the range, or retracting into the long slide rail 10 to reset. When both transmission gears 21 are rotating, the transmission plates 20 and the short slide rail 30 at both ends of the long slide rail 10 can protrude out of the long slide rail 10 to increase the range, or retract to reset. The timing, speed, and direction of rotation of the two transmission gears 21 can be controlled independently. They can rotate synchronously, at the same speed, and in the same direction, or they can rotate asynchronously, at different speeds, and in different directions. The key is that this multi-stage linkage extended range linear slide rail pair can simultaneously achieve multi-stage linkage extended range at both ends of the long slide rail 10, while the overall structure of the slide rail pair is more compact and occupies less space.

[0024] In one embodiment, the transmission plate 20 is I-shaped, and U-shaped grooves 201 are symmetrically provided on both sides of the transmission plate 20. The rollers 22 are respectively located at the bottom of the U-shaped grooves 201 on both sides. The transmission gear 21 is horizontally installed on the upper wall of the U-shaped groove 201. The first rack 11 and the second rack 31 are detachably installed on the top of the long slide rail 10 and the short slide rail 30, respectively. Thus, the design of the U-shaped groove 201 makes the overall structural layout more reasonable, the structure more compact, and reduces the space occupied.

[0025] In one embodiment, the roller 22 is a concave roller, and the upper and lower walls of the guide groove 101 are symmetrically provided with protrusions 12 that cooperate with the groove of the roller 22. Compared with the concave structure design, the long slide rail 10 and the short slide rail 30 have higher strength and rigidity, which can further improve the structural strength of the entire slide rail pair and extend its service life.

[0026] In one embodiment, the two sides of the transmission plate 20 are defined as a first side 210 and a second side 220, wherein the first side 210 is close to the long slide rail 10; The bottom of the short slide rail 30 is provided with first stops 32 at both ends along its length. Simultaneously, the lower wall of the U-shaped groove 201 is provided with two second stops 23 spaced apart near its outer end. The second stops 23 on the second side 220 cooperate with the first stops 32, and both second stops 23 on the second side 220 are located between the first stops 32 at both ends. Therefore, the cooperation of the first stops 32 and the second stops 23 on the second side 220 limits the travel of the short slide rail 30 on the transmission plate 20. Specifically, with... Figure 1 Taking the left transmission plate 20 and the left short slide rail 30 as an example, when the short slide rail 30 moves to the left to extend its stroke, the right first stop block 32 will abut against the right side of the right second stop block 23. This is the extreme protrusion position. When the short slide rail 30 moves to the right to reset, the left first stop block 32 will abut against the left side of the left second stop block 23. This is the extreme reset position. Thus, the working stability and safety of the slide rail pair can be ensured by limiting the movement stroke of the short slide rail 30 on the transmission plate 20.

[0027] In one embodiment, the long slide rail 10 has a symmetrical structure in the length direction, and the long slide rail 10 is divided into a first part 110 and a second part 120 at the center position in the length direction of the long slide rail 10. The first part 110 has two third blocks 13 spaced apart near its outer end. The third blocks 13 cooperate with the second blocks 23 of the first side 210, and the distance between the two third blocks 13 is greater than the distance between the two second blocks 23 of the first side 210. At the same time, the two second blocks 23 of the first side 210 are located between the two third blocks 13. Thus, the movement of the transmission plate 20 on the long slide rail 10 can be limited by the cooperation of the second blocks 23 and the third blocks 13. Taking the first part 110 as an example, when the transmission plate 20 moves to the left, the left second block 23 abuts against the right side of the left third block 13. This is the extreme protrusion position of the transmission plate 20. Similarly, when it moves to the right, the right second block 23 abuts against the left side of the right third block 13. This is the extreme reset position of the transmission plate 20. This can further ensure the working stability and safety of the slide rail pair.

[0028] In one embodiment, multiple rollers 22 are spaced apart along the length of the second side 220, and the number of rollers 22 arranged on the outer end of the second side 220 is greater than the number of rollers 22 arranged on the inner end of the second side 220. Thus, the stability of the short slide rail 30 during the extension process and the rigidity of the slide rail pair after the extension can be ensured by the cooperation of a larger number of rollers 22 with the guide groove 101 on the short slide rail 30 at the outer end of the second side 220. After the short slide rail 30 is reset, the overlap area between the short slide rail 30 and the transmission plate 20 is larger, and less cooperation is required, which can save the cost of rollers 22.

[0029] In one embodiment, multiple rollers 22 are spaced apart along the length of the first side 210 and are respectively close to the inner ends of the two transmission plates 20. This ensures that the transmission plate 20 can cooperate with the long slide rail 10 through a large number of rollers 22 during the range extension process, thereby ensuring the stability of the transmission plate 20 during the range extension process and the rigidity of the slide rail pair after the range extension. When the transmission plate 20 is reset, the transmission plate 20 is entirely or almost entirely within the range of the long slide rail 10. Therefore, the outer end of the transmission plate 20 on the first side 210 does not need to be equipped with rollers 22, which can greatly save equipment costs.

[0030] It should be noted that the terms "first, second, and third" used in this application are for descriptive purposes only, do not indicate any order, and should not be construed as indicating or implying relative importance. These terms can be interpreted as names.

[0031] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The advantages of the present invention have been fully and effectively realized. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from the stated principles.

Claims

1. A multi-stage linkage extended-range linear guide pair, characterized in that, It includes a long slide rail, two transmission plates and two short slide rails. The two transmission plates are arranged side by side on the same side of the long slide rail and are close to both ends along the length of the long slide rail. The two short slide rails are correspondingly arranged on the side of the two transmission plates away from the long slide rail. The transmission plate has a through-type transmission gear at a position near the center of its length. Rollers are provided on both sides of the transmission plate. The long slide rail has first racks at both ends that mesh with the transmission gear and extend along the length. The two short slide rails have second racks at their inner ends that mesh with the transmission gear and extend along the length. The long slide rail and the short slide rail each have guide grooves that cooperate with the rollers on their corresponding sides.

2. The multi-stage linkage range extending straight rail pair of claim 1, wherein, The transmission plate is I-shaped, and U-shaped grooves are symmetrically provided on both sides of the transmission plate. The rollers are respectively located at the bottom of the U-shaped grooves on both sides. The transmission gear is horizontally installed on the upper wall of the U-shaped groove. The first rack and the second rack are detachably installed on the top of the long slide rail and the short slide rail, respectively.

3. The multi-stage linkage range extending straight rail pair of claim 2, wherein, The roller is a concave roller, and the upper and lower walls of the guide groove are symmetrically provided with protrusions that cooperate with the groove of the roller.

4. The multi-stage linkage range extending straight rail pair of claim 2, wherein, The two sides of the transmission plate are defined as the first side and the second side, wherein the first side is close to the long slide rail; The bottom of the short slide rail is provided with first blocks at both ends in the length direction. The lower wall of the U-shaped groove is provided with two second blocks at intervals near the outer end. The second blocks on the second side cooperate with the first blocks, and the two second blocks on the second side are located between the first blocks at both ends.

5. The multi-stage linkage range extending straight rail pair of claim 4, wherein, The long slide rail has a symmetrical structure along its length, and is divided into a first part and a second part at the center position along its length. The first part has two third blocks spaced apart near the outer end. The third blocks cooperate with the second blocks on the first side. The distance between the two third blocks is greater than the distance between the two second blocks on the first side. The two second blocks on the first side are located between the two third blocks.

6. The multi-stage linkage range extending straight rail pair of claim 5, wherein, The rollers are spaced apart along the length of the second side, and the number of rollers arranged on the outer end of the second side is greater than the number of rollers arranged on the inner end of the second side.

7. The multi-stage linkage extended-range linear guide pair as described in claim 5 or 6, characterized in that, Multiple rollers are spaced apart along the length of the first side and are respectively close to the inner ends of the two transmission plates.

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