Tension adjustment device for escalator handrail

Abstract

The utility model discloses a tension adjusting device of automatic handrail belt, including crossbeam and C section bar, the inside sliding joint of two groups C section bar has movable plate, the back surface one side fixedly connected with mobile plate of movable plate, the surface screw thread connection of mobile plate has adjusting mechanism. This tension adjusting device of automatic handrail belt is provided with mobile plate, adjusting mechanism and guide mechanism, and the operator rotates the worm drive worm wheel by tool, drives the synchronous rotation of fixed screw rod with worm wheel, because the mobile plate of screw rod thread cooperation is only axial movement by the constraint of guide column, so the rotation of screw rod is converted into the linear lift of mobile plate, drives movable plate and presses down the steady pressure of roller group and tightens handrail belt, realizes the accurate tensioning of handrail belt, thereby realizes the stepless fine adjustment of tension, more effectively prevents the component backoff due to vibration by the self -locking characteristic of worm wheel and worm, thoroughly avoids the tension failure and handrail belt slip problem.

Description

Technical Field

[0001] This utility model relates to the field of elevator equipment technology, specifically to a tension adjustment device for automatic handrail belts. Background Technology

[0002] The handrail belt tension adjustment device is a component that ensures the normal operation of the handrail belt. It eliminates length errors caused by manufacturing and environmental variations, prevents the handrail belt from slipping off the guide rail due to excessive looseness, and avoids excessive tightness leading to severe surface wear and increased running resistance. It also prevents the handrail belt from exceeding its synchronization limit with the steps. Therefore, tension adjustment is crucial during handrail belt installation.

[0003] A simple middle handrail tensioning device disclosed in CN222249670U includes a supporting beam, a handrail tensioning adjustment module located at the middle of the upper end of the supporting beam, and handrail tensioning fixing modules symmetrically located on both sides of the upper end of the supporting beam. The handrail tensioning adjustment module includes a vertical C-shaped profile fixed to the supporting beam and a movable plate. The rear end of the movable plate has a sliding screw fitted inside the C-shaped profile, and the movable plate moves up and down along the C-shaped profile via the sliding screw. The front of the movable plate has a set of downward rollers, and the back of the movable plate has a horizontal plate. The horizontal plate and the supporting beam are both provided with guide holes, and screws are inserted into the guide holes. The handrail tensioning fixing module includes a vertical column assembled on the supporting beam, and the column is provided with a guide group for guiding the handrail. This technology utilizes the handrail tensioning adjustment module design to flexibly adjust according to different lifting heights.

[0004] However, the tension adjustment device of this automatic handrail belt has the following disadvantages: it mainly relies on sliding screws to achieve tension, but these screws are prone to loosening, resulting in unstable tension and insufficient adjustment accuracy. At the same time, the position of the lower roller group is fixed, and it cannot adaptively compensate for the deformation and wear of the handrail belt. It only relies on a single screw for adjustment, which restricts the reliability and durability of the tensioning effect. Utility Model Content

[0005] The technical problem to be solved by this utility model is as follows: to provide a tension adjustment device for an automatic handrail belt that is highly practical, easy to operate, and has a simple structure. This solves the problems mentioned in the background art, which mainly relies on sliding screws to achieve tension, but these screws are prone to loosening, resulting in unstable tension and insufficient adjustment accuracy. At the same time, the fixed position of the lower roller group makes it impossible to adaptively compensate for the deformation and wear of the handrail belt. The reliance on a single screw for adjustment restricts the reliability and durability of the tensioning effect.

[0006] The objective of this utility model can be achieved through the following technical solutions: The tension adjustment device for the automatic handrail belt includes a crossbeam and C-shaped profiles. Two sets of C-shaped profiles are internally slidably connected to movable plates. A movable plate is fixedly connected to one side of the back of each movable plate. An adjustment mechanism is threadedly connected to the surface of the movable plate. Two sets of base plates are threadedly connected to the top of the crossbeam. Tensioning mechanisms are slidably connected to the surfaces of both sets of base plates. The adjustment mechanism includes a lead screw threaded to the surface of the movable plate. A worm gear is fixedly connected to the surface of the lead screw. A worm is meshed with one side of the worm gear. An adjusting bolt is fixedly connected to one end of the worm. The tensioning mechanism includes a lower wedge block slidably connected to the surface of the base plate. An upper wedge block is slidably connected above the lower wedge block. A fixed plate is fixedly connected to the left side of the base plate. An adjusting screw is threaded through the lower wedge block and one side of the fixed plate.

[0007] As a further embodiment of this utility model: a guide mechanism is connected through the surface of the movable plate. The guide mechanism includes two sets of guide columns that are connected through the surface of the movable plate. A top plate and a bottom plate are fixedly connected to the two ends of the guide columns, respectively. The top plate is threaded to the top of the two sets of C-shaped profiles, and the bottom plate is threaded to the bottom of the crossbeam. The top plate and the bottom plate enhance the overall structural stability and ensure the vertical movement accuracy of the movable plate.

[0008] As a further embodiment of this utility model: two sets of C-shaped profiles are threadedly connected to the top of the crossbeam, and sliding screws are installed around the perimeter of the movable plate. The sliding screws are slidably connected to the inside of the C-shaped profiles. The sliding screws guide the movable plate to slide stably up and down along the C-shaped profiles.

[0009] As a further embodiment of this utility model: the lead screw is rotatably connected to the bottom end of the top plate, the lead screw is rotatably connected to the top of the bottom plate, the bottom end of the worm gear is rotatably connected to a base, the crossbeam is threadedly connected to a protective box above the worm gear and worm, and the base is threadedly connected to the inner bottom wall of the protective box. The base serves to support and fix the worm gear and ensure its stable rotation.

[0010] As a further embodiment of this utility model: the base plate is fixedly connected to a limiting plate above the right side of the upper wedge block, and a sliding groove is provided on one side of the limiting plate. A slider is slidably connected inside the sliding groove, and the slider is fixedly connected to the right side of the upper wedge block. The setting of the slider plays a limiting role.

[0011] As a further embodiment of this utility model: the front of the movable plate is provided with a downward pressing roller assembly, and the front of the upper wedge is provided with an upper abutting roller assembly. The downward pressing roller assembly serves to apply downward tension.

[0012] As a further embodiment of this utility model: both ends of the crossbeam are threadedly connected to columns, and one side of the column is threadedly connected to a side plate. The front of the side plate is respectively provided with a guide plate and a guide roller. The guide plate and guide roller are provided to limit and support the handrail belt.

[0013] The beneficial effects of this utility model are: 1. The tension adjustment device of this automatic handrail belt, through the setting of a moving plate, adjustment mechanism and guide mechanism, allows the operator to drive the worm wheel to rotate by rotating the worm gear with a tool, which in turn drives the lead screw fixed to the worm wheel to rotate synchronously. Since the moving plate, which is threaded with the lead screw, can only move axially due to the constraint of the guide column, the rotational motion of the lead screw is converted into the linear lifting and lowering of the moving plate, which drives the movable plate and the lower pressure roller group to smoothly press the handrail belt, thereby achieving precise tensioning of the handrail belt. This achieves stepless fine adjustment of tension. Furthermore, the self-locking characteristics of the worm gear effectively prevent the components from returning due to vibration, completely avoiding tension failure and handrail belt slippage problems.

[0014] 2. The tension adjustment device of this automatic handrail belt, through the setting of the base plate and tensioning mechanism, allows the operator to rotate the adjusting screw that passes through the lower wedge block and the fixed plate, forcing the lower wedge block to slide horizontally to the right along the surface of the base plate. Since the upper and lower wedge blocks are connected by a sliding inclined plane, the horizontal movement of the lower wedge block will drive the upper wedge block to move vertically upward under the constraint of the limiting plate and the slider, thereby driving the upper abutment roller assembly installed on its front to rise, pressing and tensioning the handrail belt from below. Thus, the horizontal screw adjustment force is converted into a vertical tightening force, realizing independent and precise tension adjustment of the handrail belt in another direction. This effectively avoids the problem of uneven tension or handrail belt deviation that may be caused by single pressing and tensioning, ensuring uniform tension and stable operation of the handrail belt throughout its entire circumference, and preventing local wear and slippage. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the adjustment mechanism of this utility model; Figure 3 This is a schematic diagram of the tensioning mechanism of this utility model; Figure 4 This is a schematic diagram of the guiding mechanism structure of this utility model.

[0017] In the diagram: 1. Crossbeam; 2. C-profile; 3. Movable plate; 4. Moving plate; 5. Adjusting mechanism; 501. Lead screw; 502. Worm gear; 503. Worm; 504. Adjusting bolt; 6. Base plate; 7. Tensioning mechanism; 701. Lower wedge; 702. Upper wedge; 703. Fixed plate; 704. Adjusting screw; 8. Guide mechanism; 801. Guide column; 802. Top plate; 803. Base plate; 9. Sliding screw; 10. Base; 11. Protective box; 12. Limiting plate; 13. Sliding block; 14. Lower pressure roller assembly; 15. Upper abutment roller assembly; 16. Column; 17. Side plate; 18. Guide plate; 19. Guide roller. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figure 1-4 As shown, the tension adjustment device of the automatic handrail belt includes a crossbeam 1 and a C-shaped profile 2. The interior of the two sets of C-shaped profiles 2 is slidably connected to a movable plate 3. A movable plate 4 is fixedly connected to one side of the back of the movable plate 3. An adjustment mechanism 5 is threadedly connected to the surface of the movable plate 4. The top of the crossbeam 1 is threadedly connected to two sets of base plates 6. The surfaces of the two sets of base plates 6 are slidably connected to a tensioning mechanism 7. The adjustment mechanism 5 includes a screw 501 threadedly connected to the surface of the movable plate 4. A worm gear 502 is fixedly connected to the surface of the screw 501. A worm 503 is meshed with one side of the worm gear 502. An adjustment bolt 504 is fixedly connected to one end of the worm 503. The tensioning mechanism 7 includes a lower wedge 701 slidably connected to the surface of the base plate 6. An upper wedge 702 is slidably connected above the lower wedge 701. A fixed plate 703 is fixedly connected to the left side of the base plate 6. An adjustment screw 704 is threadedly connected through the lower wedge 701 and one side of the fixed plate 703. like Figure 4 As shown, a guide mechanism 8 is connected through the surface of the movable plate 4. The guide mechanism 8 includes two sets of guide posts 801 that are connected through the surface of the movable plate 4. A top plate 802 and a bottom plate 803 are fixedly connected to both ends of the guide posts 801 respectively. The top plate 802 is threaded to the top of the two sets of C-shaped profiles 2, and the bottom plate 803 is threaded to the bottom of the crossbeam 1. The top plate 802 and the bottom plate 803 enhance the overall structural stability and ensure the vertical movement accuracy of the movable plate 4. like Figure 1As shown, two sets of C-shaped profiles 2 are threadedly connected to the top of the crossbeam 1. Sliding screws 9 are installed around the perimeter of the movable plate 3. The sliding screws 9 are slidably connected to the inside of the C-shaped profiles 2. The sliding screws 9 guide the movable plate 3 to slide stably up and down along the C-shaped profiles 2. like Figure 2 As shown, the lead screw 501 is rotatably connected to the bottom end of the top plate 802 and the top of the base plate 803. The bottom end of the worm gear 502 is rotatably connected to the base 10. The crossbeam 1 is located above the worm gear 502 and the worm 503 and is threadedly connected to the protective box 11. The base 10 is threadedly connected to the inner bottom wall of the protective box 11. The base 10 serves to support and fix the worm gear 502 and ensure its stable rotation. like Figure 1 As shown, the base plate 6 is fixedly connected to the upper right side of the upper wedge 702 by a limiting plate 12. A sliding groove is provided on one side of the limiting plate 12, and a slider 13 is slidably connected inside the sliding groove. The slider 13 is fixedly connected to the right side of the upper wedge 702. The setting of the slider 13 plays a limiting role. like Figure 1 As shown, the front of the movable plate 3 is provided with a downward pressing roller group 14, and the front of the upper wedge block 702 is provided with an upper abutting roller group 15. The downward pressing roller group 14 is used to apply downward tension force. like Figure 1 As shown, both ends of the crossbeam 1 are threadedly connected to columns 16, and one side of the column 16 is threadedly connected to a side plate 17. The front of the side plate 17 is provided with a guide plate 18 and a guide roller 19. The guide plate 18 and the guide roller 19 are used to limit and support the handrail belt.

[0020] The working principle of this utility model is as follows: The operator drives the worm wheel 502 to rotate by rotating the worm 503 with a tool, which drives the lead screw 501 fixed to the worm wheel 502 to rotate synchronously. Since the moving plate 4, which is threaded with the lead screw 501, is constrained by the guide column 801 and can only move axially, the rotational motion of the lead screw 501 is converted into the linear lifting and lowering of the moving plate 4, which drives the movable plate 3 and the lower pressure roller group 14 to smoothly press the handrail belt, thereby achieving precise tensioning of the handrail belt.

[0021] The operator rotates the adjusting screw 704 that passes through the lower wedge 701 and the fixed plate 703, forcing the lower wedge 701 to slide horizontally to the right along the surface of the base plate 6. Since the upper wedge 702 and the lower wedge 701 are connected by a sloping surface, the horizontal movement of the lower wedge 701 will drive the upper wedge 702 to move vertically upward under the constraint of the limiting plate 12 and the slider 13, thereby driving the upper abutment roller assembly 15 installed on its front to rise, pressing and tensioning the handrail belt from below.

[0022] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A tension adjustment device for an automatic handrail belt, comprising a crossbeam (1) and a C-shaped profile (2), characterized in that: The two sets of C-shaped profiles (2) are internally connected to a movable plate (3), and a movable plate (4) is fixedly connected to one side of the back of the movable plate (3). An adjustment mechanism (5) is threadedly connected to the surface of the movable plate (4). Two sets of base plates (6) are threadedly connected to the top of the crossbeam (1). A tensioning mechanism (7) is slidably connected to the surface of both sets of base plates (6). The adjustment mechanism (5) includes a lead screw (501) threaded to the surface of the movable plate (4), a worm gear (502) fixedly connected to the surface of the lead screw (501), a worm (503) meshing with one side of the worm gear (502), and an adjustment bolt (504) fixedly connected to one end of the worm (503). The tensioning mechanism (7) includes a lower wedge (701) slidably connected to the surface of the base plate (6), an upper wedge (702) slidably connected above the lower wedge (701), a fixing plate (703) fixedly connected to the left side of the base plate (6), and an adjusting screw (704) threadedly connected to one side of the lower wedge (701) and the fixing plate (703).

2. The tension adjusting device for the automatic handrail belt according to claim 1, characterized in that, The surface of the movable plate (4) is connected to a guide mechanism (8). The guide mechanism (8) includes two sets of guide posts (801) that are connected to the surface of the movable plate (4). The two ends of the guide posts (801) are respectively fixedly connected to a top plate (802) and a bottom plate (803). The top plate (802) is threaded to the top of two sets of C-shaped profiles (2), and the bottom plate (803) is threaded to the bottom of the crossbeam (1).

3. The tension adjusting device for the automatic handrail belt according to claim 1, characterized in that, The two sets of C-profiles (2) are threadedly connected to the top of the crossbeam (1), and sliding screws (9) are installed around the movable plate (3), which are slidably connected to the inside of the C-profiles (2).

4. The tension adjusting device for the automatic handrail belt according to claim 1, characterized in that, The lead screw (501) is rotatably connected to the bottom end of the top plate (802), the lead screw (501) is rotatably connected to the top of the bottom plate (803), the bottom end of the worm gear (502) is rotatably connected to the base (10), the crossbeam (1) is located above the worm gear (502) and the worm (503) and is threadedly connected to the protective box (11), and the base (10) is threadedly connected to the inner bottom wall of the protective box (11).

5. The tension adjusting device for the automatic handrail belt according to claim 1, characterized in that, The base plate (6) is fixedly connected to the upper right side of the upper wedge (702) by a limiting plate (12). A sliding groove is provided on one side of the limiting plate (12), and a slider (13) is slidably connected inside the sliding groove. The slider (13) is fixedly connected to the right side of the upper wedge (702).

6. The tension adjusting device for the automatic handrail belt according to claim 1, characterized in that, The front of the movable plate (3) is provided with a downward pressing roller group (14), and the front of the upper wedge block (702) is provided with an upper abutting roller group (15).

7. The tension adjusting device for the automatic handrail belt according to claim 1, characterized in that, Both ends of the crossbeam (1) are threaded with columns (16), and one side of the column (16) is threaded with a side plate (17). The front of the side plate (17) is provided with a guide plate (18) and a guide roller (19).

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