Self-adapting counterbalance pulley

Abstract

The utility model provides a kind of self-adapting balance pulley, including strip shell, two limit blocks, several first sliding blocks and several sliding assemblies;Two first wedge surfaces have on the first sliding block, the sliding assembly includes second sliding block, pulley set and intermediate shaft, and two second wedge surfaces have on the second sliding block;The first sliding block and sliding assembly are installed between the two limit blocks in the main installation groove of strip shell with interval mode, and the height change of guide rail is adapted by the sliding cooperation of first wedge surface and second wedge surface;The pulley set includes pulley inner shell and gyro wheel, intermediate shaft hole has on the pulley inner shell, intermediate shaft passes through intermediate shaft hole and erects pulley set in the gyro wheel groove of second sliding block, and the pulley set swings horizontally in intermediate shaft hole by intermediate shaft, and the bending change of guide rail is adapted.The utility model makes that door leaf or window leaf can simultaneously adapt the height fluctuation and bending change of guide rail.

Description

Technical Field

[0001] This utility model relates to the field of door and window hardware, and more specifically, to an adaptive balancing pulley. Background Technology

[0002] Sliding doors and windows are common door and window structures. They typically have pulley systems installed along the lower edge of the door or window sash, allowing the sash to move along a fixed track. Unlike casement doors or windows that use hinges to connect the sashes, sliding doors and windows are characterized by their simple structure and ease of installation.

[0003] In the aforementioned sliding door and window systems, the guide rails may experience unevenness or bending (often both unevenness and bending) due to pressure during long-term use. This can cause the sliding doors and windows to tilt or become difficult to move along the guide rails. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an adaptive balancing pulley to address the problem of tilting and poor movement of sliding doors and windows caused by the undulation and bending of the guide rails.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is to provide an adaptive balance pulley for installation on the lower edge of a door or window sash and to make the door or window sash slide on a guide rail. The adaptive balance pulley includes a strip-shaped housing, two limiting blocks, a plurality of first sliding blocks, and a plurality of sliding components. The strip-shaped housing has a main mounting groove, and the main mounting groove is arranged along the length direction of the strip-shaped housing. The two limiting blocks are respectively fixed in the main mounting groove.

[0006] The first sliding block has two ends along its length that have first wedge surfaces facing the opening of the main mounting groove; the sliding assembly includes a second sliding block, a pulley group and an intermediate shaft, and the second sliding block has two ends along its length that have second wedge surfaces facing away from the opening of the main mounting groove. The first sliding block and the sliding assembly are installed alternately between two limiting blocks in the main mounting groove, and the first wedge surface of the first sliding block is slidably connected to the second wedge surface of the adjacent sliding assembly, and the sliding cooperation of the first wedge surface and the second wedge surface adapts to the height changes of the guide rail.

[0007] The pulley assembly includes a pulley inner shell and rollers. The rollers are mounted on the pulley inner shell via a first pin. The pulley inner shell has an intermediate shaft hole, and the horizontal dimension of the intermediate shaft hole is larger than the diameter of the intermediate shaft. The second sliding block has a roller groove. The intermediate shaft passes through the intermediate shaft hole to support the pulley assembly within the roller groove, and the pulley assembly swings horizontally within the intermediate shaft hole via the intermediate shaft to adapt to the bending changes of the guide rail.

[0008] As a further improvement of this utility model, the inner shell of the pulley has two pin holes, which are located on both sides of the intermediate shaft hole, and the distance between the two pin holes and the intermediate shaft hole is equal; the pulley group includes two rollers, and each roller is mounted on the inner shell of the pulley by a first pin passing through a pin hole, and the pulley group adapts to the height changes of the guide rail by rotating the inner shell of the pulley around the intermediate shaft.

[0009] As a further improvement of this utility model, the second sliding block has two roller grooves, the two roller grooves are distributed along the width direction of the second sliding block, and there is a partition between the two roller grooves; the partition has a shaft hole, and the intermediate shaft passes through the shaft hole to install the two pulley groups into the two roller grooves respectively.

[0010] As a further improvement of this utility model, each first wedge surface has a first protruding ridge and a first sliding groove located inside the first protruding ridge on its side, and each second wedge surface has a second protruding ridge and a second sliding groove located inside the second protruding ridge on its side. The second protruding ridges of the two second wedge surfaces are respectively located on different sides of the width direction of the second sliding block. When the first sliding block and the sliding assembly are assembled into the main mounting groove, the first protruding ridge of the first sliding block is embedded into the second sliding groove of the adjacent second sliding block, and the second protruding ridge of the second sliding block is embedded into the first sliding groove of the adjacent first sliding block.

[0011] As a further improvement of this utility model, the width of the second sliding block is smaller than the width of the main mounting groove.

[0012] As a further improvement of this utility model, each of the limiting blocks is adjacent to a sliding component, and each of the limiting blocks has a third wedge surface facing the opening of the main mounting groove. The side of the third wedge surface has a third protruding ridge and a third sliding groove located inside the third protruding ridge. The third wedge surface of the limiting block is slidably connected to the second wedge surface of the adjacent sliding component. The third protruding ridge is embedded in the second sliding groove, and the second protruding ridge is embedded in the third sliding groove.

[0013] As a further improvement of this utility model, the first sliding block has a horizontal strip hole, which penetrates the first sliding block along the width direction; the first sliding block is mounted in the main mounting groove of the strip-shaped housing by a second pin passing through the horizontal strip hole.

[0014] As a further improvement of this utility model, the included angle between the first wedge surface and the bottom surface of the first sliding block is 40-50°, and the included angle between the second wedge surface and the bottom surface of the second sliding block is 130-140°.

[0015] As a further improvement of this utility model, the first groove is located inside the first wedge surface, and the first protrusion is formed by the portion between the first groove and the first wedge surface on the first sliding block; the second protrusion and the second groove protrude from the second wedge surface.

[0016] As a further improvement of this utility model, the dimension of the first sliding block in the length direction of the strip-shaped shell is smaller than the dimension of the second sliding block in the length direction of the strip-shaped shell.

[0017] The present invention has the following advantages: by the cooperation of the first wedge surface on the first sliding block and the second wedge surface on the second sliding block of the sliding assembly, and by the cooperation of the intermediate shaft with the intermediate shaft hole on the inner shell of the pulley, the door leaf or window leaf can adapt to both the height and undulation of the guide rail and the bending changes of the guide rail. Attached Figure Description

[0018] Figure 1 This is an exploded structural diagram of the adaptive balancing pulley provided in an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the first sliding block in the adaptive balancing pulley provided in this embodiment of the utility model.

[0020] Figure 3 This is a schematic diagram of the sliding component in the adaptive balancing pulley provided in this embodiment of the utility model.

[0021] Figure 4 This is a schematic diagram of the limiting block in the adaptive balancing pulley provided in this embodiment of the utility model.

[0022] Figure 5 This is a schematic diagram of the second sliding block in the adaptive balancing pulley provided in this embodiment of the utility model.

[0023] Figure 6 This is a schematic diagram of the pulley block in the adaptive balancing pulley provided in this embodiment of the utility model.

[0024] Figure 7 This is a schematic diagram of the inner shell of the adaptive balancing pulley provided in this embodiment of the utility model.

[0025] Figure 8 This is a cross-sectional structural diagram of the sliding component in the adaptive balancing pulley provided in this embodiment of the utility model.

[0026] The following are the reference numerals in the attached figures:

[0027] 10 Strip-shaped housing 11 Main mounting slot

[0028] 21 Limiting block 211 Third wedge surface

[0029] 212 Third protruding rib 213 Third sliding groove

[0030] 22 Fixed pin 31 First sliding block

[0031] 311 First wedge surface 312 First convex edge

[0032] 313 First groove 314 Slotted hole

[0033] 32 Second pin 40 Sliding assembly

[0034] 41 Second sliding block 411 Second wedge surface

[0035] 412 Second protruding rib 413 Second sliding groove

[0036] 414 Roller groove 415 Partition plate

[0037] 4151 shaft hole, 416 protrusion

[0038] 42 Pulley system 421 Pulley inner housing

[0039] 4211 Intermediate shaft hole; 4212 Pin hole

[0040] 422 Roller 423 First Pin

[0041] 43 Intermediate Shaft Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0043] like Figure 1-3 The diagram shown is a schematic of an adaptive balancing pulley provided in an embodiment of this utility model. This adaptive balancing pulley is used to install onto the lower edge of a door or window sash, allowing the door or window sash to slide on a guide rail. The adaptive balancing pulley of this embodiment includes a strip-shaped housing 10, two limiting blocks 21, several first sliding blocks 31, and several sliding components 40. The strip-shaped housing 10 can be made of a hard material such as metal, and its width (e.g., Figure 1 The direction indicated by the middle arrow X) is adapted to the thickness of the door or window sash, and its length (such as...) Figure 1The width of the door or window sash (in the direction indicated by the middle arrow Y) is less than the width of the door or window sash. The strip-shaped housing 10 has a main mounting groove 11, which is arranged along the length of the strip-shaped housing 10. Two limiting blocks 21 are fixed within the main mounting groove 11, for example, at opposite ends of the length of the main mounting groove 11. The sliding assembly 40 and the first sliding block 31 are arranged alternately within the main mounting groove 11 between the two limiting blocks 21, i.e., the limiting blocks 21, the first sliding block 31, and the sliding assembly 40 are arranged in a row within the main mounting groove 11. An adaptive balance pulley is fixed to the lower edge of the door or window sash via the strip-shaped housing 10, and the opening of the main mounting groove 11 of the strip-shaped housing 10 faces downwards (i.e., towards the downward-facing guide rail).

[0044] The aforementioned first sliding block 31 can be made of materials with high hardness, such as metal or hard plastic, and the length direction of the first sliding block 31 (e.g., Figure 1 The two ends of the first sliding block 31 (in the direction indicated by the middle arrow Y) each have a first wedge surface 311 facing the opening of the main mounting groove 11. Specifically, the two end faces of the first sliding block 31 in the length direction can be formed by two first wedge surfaces 311, that is, the first sliding block 31's end faces perpendicular to its width direction (such as...) Figure 1 The outer contour of the cross section (in the direction indicated by the middle arrow X) is roughly an isosceles trapezoid.

[0045] The sliding assembly 40 includes a second sliding block 41, a pulley block 42, and an intermediate shaft 43. The pulley block 42 is mounted to the second sliding block 41 via the intermediate shaft 43. As will be understood by those skilled in the art, after the sliding assembly 40 is mounted to the main mounting groove 11 of the strip-shaped housing 10, at least a portion of the pulley block 42 always protrudes from the opening of the main mounting groove 11 and engages with the guide rail through the portion of the pulley block 42 protruding from the opening of the main mounting groove 11, so that the door or window can move along the guide rail.

[0046] The aforementioned second sliding block 41 can also be made of materials with high hardness, such as metal or hard plastic, and the length direction of the second sliding block 41 (e.g. Figure 1 The two ends of the second sliding block 41 (in the direction indicated by the middle arrow Y) each have a second wedge surface 411 facing away from the opening of the main mounting groove 11. Specifically, the two end faces of the second sliding block 41 in the length direction can be formed by two second wedge surfaces 411, that is, the two end faces of the second sliding block 41 perpendicular to its width direction (e.g., the two wedge surfaces 411). Figure 1 The outer contour of the cross section (in the direction indicated by the middle arrow X) is roughly an isosceles trapezoid.

[0047] After the first sliding block 31 and the sliding assembly 40 are installed into the main mounting groove 11 of the strip-shaped housing 10, the first wedge surface 311 of the first sliding block 31 is slidably connected to the second wedge surface 411 of the adjacent sliding assembly 40, and adapts to the height changes of the guide rail through the sliding cooperation of the first wedge surface 311 and the second wedge surface 411. That is, when the guide rail fluctuates, the sliding assembly 40 is pushed up under pressure when the guide rail in contact with it is raised (i.e., moves away from the opening direction of the main mounting groove 11), and at the same time, it pushes the first sliding blocks 31 on both sides to slide along the length direction of the main mounting groove 11 through its second wedge surface 411; when the guide rail in contact with it is lowered, the sliding assembly 40 is lowered due to the smaller pressure, so that the first sliding blocks 31 on both sides move closer to it. In this way, when the guide rail rises and falls within a certain range, the sliding component 40 can follow the rise and fall of the guide rail and always be in contact with the guide rail, thereby avoiding the separation of some sliding components 40 from the guide rail, which would cause excessive local pressure on the remaining sliding components 40 and thus cause the door or window to tilt.

[0048] Combination Figures 5-7 As shown, the pulley assembly 42 includes a pulley inner shell 421 and a roller 422. The pulley inner shell 421 can be made of a hard material such as metal, and the roller 422 is mounted on the pulley inner shell 421 via a first pin 423. Those skilled in the art will understand that the lower edge of the roller 422 protrudes beyond the lower edge of the pulley inner shell 421. After the pulley assembly 42 is mounted to the second sliding block 41, the lower edge of the roller 422 protrudes beyond the bottom surface of the second sliding block 41. After the sliding assembly 40 is mounted to the main mounting groove 11 of the strip-shaped housing 10, the lower edge of the roller 422 protrudes beyond the opening of the main mounting groove 11 of the strip-shaped housing 10. The pulley inner shell 421 has an intermediate shaft hole 4211, and the horizontal dimension 'a' of the intermediate shaft hole 4211 is greater than the diameter of the intermediate shaft 43. The second sliding block 41 has a roller groove 414. The intermediate shaft 43 passes through the intermediate shaft hole 4211 of the inner shell of the pulley 421, supporting the pulley assembly 42 within the roller groove 414. The pulley assembly 42 swings horizontally within the intermediate shaft hole 4211 via the intermediate shaft 43 (e.g., swing angle of 1-3°) to adapt to the bending changes of the guide rail. For example, when the guide rail bends to the left, because the horizontal dimension of the intermediate shaft hole 4211 is slightly larger, the front end of the pulley assembly 42 can twist to the left relative to the intermediate shaft 43. Thus, when the guide rail bends within a certain range, the sliding component 40 can change with the bending of the guide rail, thereby allowing the door or window sash to slide smoothly. Those skilled in the art will understand that, to ensure the relative stability of the pulley assembly 42, the vertical dimension b of the aforementioned intermediate shaft hole 4211 is matched with the diameter of the intermediate shaft 43 to avoid excessive noise from the sliding component 40 when the door or window sash moves; and, if Figure 8 As shown, in order for the pulley block 42 to swing within the roller groove 414, the width of the roller groove 414 (e.g.) Figure 8The direction indicated by the middle arrow Z) is greater than the width of pulley block 42.

[0049] The aforementioned adaptive balancing pulley, through the cooperation of the first wedge surface 311 on the first sliding block 31 and the second wedge surface 411 on the second sliding block 41 of the sliding assembly 40, and through the cooperation of the intermediate shaft 43 with the intermediate shaft hole 4211 on the inner shell of the pulley, enables the sliding assembly 40 to adapt to both the height and undulation of the guide rail, as well as the bending changes of the guide rail, ensuring smooth sliding of the door or window sash.

[0050] Combination Figure 6 , Figure 7 As shown, in one embodiment of this utility model, the pulley inner shell 421 has two pin holes 4212, which are located on both sides of the intermediate shaft hole 4211, and the distance between the two pin holes 4212 and the intermediate shaft hole 4211 is equal (the two pin holes 4212 are at the same horizontal height). The pulley assembly 42 includes two rollers 422, and each roller 422 is mounted on the pulley inner shell 421 by a first pin 423 passing through a pin hole 4212. The pulley assembly 42 adapts to the height changes of the guide rail by rotating the pulley inner shell 421 around the intermediate shaft. In this way, it can better adapt to the height fluctuations of the guide rail. Those skilled in the art will understand that the pin holes 4212 and the intermediate shaft holes 4211 are respectively arranged along the width direction of the main mounting groove 11, and the pin holes 4212 and the intermediate shaft holes 4211 are distributed on the pulley inner shell 421 along the length direction of the main mounting groove 11. In practical applications, the specific structure of the pulley inner shell 421 and the specific structure of the roller 422 assembled into the pulley inner shell 421 can adopt conventional solutions in the field, and will not be described in detail here.

[0051] Combination Figure 5 , Figure 6 As shown, in one embodiment of this utility model, the second sliding block 41 has two roller grooves 414, which are distributed along the width direction of the second sliding block 41, and a partition 415 is provided between the two roller grooves 414. The partition 415 has a shaft hole 4151, through which the intermediate shaft 43 passes to install the two pulley groups 42 into the two roller grooves 414 respectively. In this way, double guide rail sliding can be realized, improving the load-bearing capacity of the adaptive balance pulley. In particular, to enhance the stability of the intermediate shaft 43, each roller groove 414 has a protrusion 416 at its top, and the protrusion 416 has an arc-shaped groove adapted to the intermediate shaft 43. Thus, when the intermediate shaft 43 passes through the shaft hole 4151, a part of the intermediate shaft 43 is embedded in the arc-shaped groove of the protrusion 416, and the protrusion 416 provides partial support for the intermediate shaft 43, improving the overall structural strength of the sliding assembly 40.

[0052] Combination Figures 2-3As shown, in one embodiment of this utility model, on the first sliding block 31, each first wedge surface 311 has a first protruding ridge 312 and a first groove 313 located inside the first protruding ridge 312 on its side; correspondingly, on the second sliding block 41, each second wedge surface 411 has a second protruding ridge 412 and a second groove 413 located inside the second protruding ridge 412 on its side, and the second protruding ridges 412 of the two second wedge surfaces 411 are respectively located on different sides of the width direction of the second sliding block 41. Those skilled in the art will understand that the center lines of the first protruding ridge 312 and the first groove 313 are parallel to the first wedge surface 311, and the center lines of the second protruding ridge 412 and the second groove 413 are parallel to the second wedge surface 411, and the surfaces of the first protruding ridge 312 and the second protruding ridge 412, and the inner walls of the first groove 313 and the second groove 413 are all smooth.

[0053] When the first sliding block 31 and the sliding assembly 40 are assembled into the main mounting groove 11, the first protrusion 312 of the first sliding block 31 is embedded into the second groove 413 of the adjacent second sliding block 41, and the second protrusion 412 of the second sliding block 41 is embedded into the first groove 313 of the adjacent first sliding block 31. In this way, the first sliding block 31 and the adjacent sliding assembly 40 can be movably connected, thereby realizing the linkage between the sliding assembly 40 and the first sliding block 31.

[0054] Specifically, the width of the second sliding block 41 is smaller than the width of the main mounting groove 11. In this way, the second sliding block 41 can slide within the main mounting groove 11 along its width direction (maintaining a movable connection with the adjacent first sliding block 31 during the sliding process), further adapting to the bending changes of the guide rail.

[0055] Furthermore, on the first sliding block 31, the first groove 313 is located inside the first wedge surface 311, and the first protrusion 312 is formed by the portion between the first groove 313 and the first wedge surface 311 on the first sliding block 31; on the second sliding block 41, the second protrusion 412 and the second groove 413 protrude from the second wedge surface 411. This structure facilitates the assembly of the first sliding block 31 and the sliding assembly 40 together.

[0056] like Figure 4As shown, in one embodiment of this utility model, each limiting block 21 is fixed to both ends of the main mounting groove 11 by two fixing pins 22. Each limiting block 21 is adjacent to a sliding component 40, and each limiting block 21 has a third wedge surface 211 opening towards the main mounting groove 11. The side of the third wedge surface 211 has a third protruding ridge 212 and a third sliding groove 213 located inside the third protruding ridge 212. The third wedge surface 211 of the limiting block 21 is slidably connected to the second wedge surface 411 of the adjacent sliding component 40. The third protruding ridge 212 is embedded in the second sliding groove 413, and the second protruding ridge 412 is embedded in the third sliding groove 213. In this way, the sliding component 40 and the limiting block 21 can be movably connected.

[0057] like Figure 2 As shown, in one embodiment of this utility model, the first sliding block 31 has a horizontal strip hole 314, which is along the width direction of the first sliding block 31 (e.g., ...). Figure 1 The direction indicated by arrow X in the diagram) passes through the first sliding block 31, and the first sliding block 31 is mounted in the main mounting groove 11 of the strip-shaped housing 10 via a second pin 32 passing through the horizontal strip-shaped hole 314. In this manner, the first sliding block 31 can move along its length within the main mounting groove 11. Of course, in practical applications, the first sliding block 31 can also be installed in the main mounting groove 11 in other ways, which will not be elaborated here.

[0058] In one embodiment of this utility model, the angle between the first wedge surface 311 and the bottom surface of the first sliding block 31 is 40-50°, and the angle between the second wedge surface 411 and the bottom surface of the second sliding block 41 is 130-140°. This ensures that the first sliding block 31 can smoothly move horizontally when the sliding assembly 40 moves up and down.

[0059] In order to make the adaptive balance pulley of this invention have a larger load-bearing capacity (to accommodate a relatively larger number of sliding components 40), the first sliding block 31 is smaller in the length direction of the strip-shaped housing 10 than the second sliding block 41 is smaller in the length direction of the strip-shaped housing 10.

[0060] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An adaptive balancing pulley for mounting to the lower edge of a door or window sash and allowing the door or window sash to slide on a guide rail, characterized in that, The adaptive balance pulley includes a strip-shaped housing, two limiting blocks, several first sliding blocks, and several sliding components; the strip-shaped housing has a main mounting groove, and the main mounting groove is arranged along the length direction of the strip-shaped housing, and the two limiting blocks are respectively fixed in the main mounting groove; The first sliding block has two ends along its length that have first wedge surfaces facing the opening of the main mounting groove; the sliding assembly includes a second sliding block, a pulley group and an intermediate shaft, and the second sliding block has two ends along its length that have second wedge surfaces facing away from the opening of the main mounting groove; the first sliding block and the sliding assembly are installed alternately between two limiting blocks in the main mounting groove, and the first wedge surface of the first sliding block is slidably connected to the second wedge surface of the adjacent sliding assembly, and the sliding cooperation of the first wedge surface and the second wedge surface adapts to the height changes of the guide rail; The pulley assembly includes a pulley inner shell and rollers. The rollers are mounted on the pulley inner shell via a first pin. The pulley inner shell has an intermediate shaft hole, and the horizontal dimension of the intermediate shaft hole is larger than the diameter of the intermediate shaft. The second sliding block has a roller groove. The intermediate shaft passes through the intermediate shaft hole to support the pulley assembly within the roller groove, and the pulley assembly swings horizontally within the intermediate shaft hole via the intermediate shaft to adapt to the bending changes of the guide rail.

2. The adaptive balancing pulley according to claim 1, characterized in that, The inner shell of the pulley has two pin holes, which are located on both sides of the intermediate shaft hole, and the distance between the two pin holes and the intermediate shaft hole is equal. The pulley assembly includes two rollers, and each roller is mounted on the inner shell of the pulley by a first pin passing through a pin hole. The pulley assembly adapts to the height changes of the guide rail by rotating the inner shell of the pulley around the intermediate shaft.

3. The adaptive balancing pulley according to claim 2, characterized in that, The second sliding block has two roller grooves, which are distributed along the width direction of the second sliding block, and a partition is provided between the two roller grooves; the partition has a shaft hole, and the intermediate shaft passes through the shaft hole to install the two pulley groups into the two roller grooves respectively.

4. The adaptive balancing pulley according to any one of claims 1-3, characterized in that, Each first wedge has a first protruding ridge on its side and a first sliding groove located inside the first protruding ridge. Each second wedge has a second protruding ridge on its side and a second sliding groove located inside the second protruding ridge. The second protruding ridges of the two second wedges are located on different sides of the width direction of the second sliding block. When the first sliding block and the sliding assembly are assembled into the main mounting groove, the first protruding ridge of the first sliding block is embedded into the second sliding groove of the adjacent second sliding block, and the second protruding ridge of the second sliding block is embedded into the first sliding groove of the adjacent first sliding block.

5. The adaptive balancing pulley according to claim 4, characterized in that, The width of the second sliding block is smaller than the width of the main mounting groove.

6. The adaptive balancing pulley according to claim 4, characterized in that, Each of the limiting blocks is adjacent to a sliding component, and each of the limiting blocks has a third wedge surface facing the opening of the main mounting groove. The side of the third wedge surface has a third protruding ridge and a third sliding groove located inside the third protruding ridge. The third wedge surface of the limiting block is slidably connected to the second wedge surface of the adjacent sliding component. The third protruding ridge is embedded in the second sliding groove, and the second protruding ridge is embedded in the third sliding groove.

7. The adaptive balancing pulley according to any one of claims 1-6, characterized in that, The first sliding block has a horizontal strip hole that extends through the first sliding block along its width direction; the first sliding block is mounted in the main mounting groove of the strip-shaped housing by a second pin passing through the horizontal strip hole.

8. The adaptive balancing pulley according to any one of claims 1-6, characterized in that, The angle between the first wedge surface and the bottom surface of the first sliding block is 40-50°, and the angle between the second wedge surface and the bottom surface of the second sliding block is 130-140°.

9. The adaptive balancing pulley according to claim 4, characterized in that, The first groove is located inside the first wedge surface, and the first protrusion is formed by the portion of the first sliding block between the first groove and the first wedge surface; the second protrusion and the second groove protrude from the second wedge surface.

10. The adaptive balancing pulley according to any one of claims 1-6, characterized in that, The dimension of the first sliding block in the length direction of the strip-shaped shell is smaller than the dimension of the second sliding block in the length direction of the strip-shaped shell.

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