Clamping device for torsion test of ladder treading stick and pedal

Abstract

The utility model discloses a torsion test clamping device for ladder treading sticks and pedals, which relates to the technical field of torsion tests for ladder treading sticks and pedals and comprises a base, a supporting block is fixedly connected to the top of the base, and a supporting shaft is connected to the top of the supporting block through a bearing. The top of the supporting block is connected with a tension spring through a supporting shaft bearing, one end of the tension spring is connected with a connecting shaft through a bearing, the top of the supporting block is connected with a driving air cylinder through a supporting shaft bearing, the output end of the driving air cylinder is connected with a buckling plate through a connecting shaft bearing, and the outer wall of the buckling plate is slidably connected with a top block. The outer wall of the buckling plate is in bearing connection with a movable shaft, and the outer wall of the movable shaft is in bearing connection with an adjusting rod assembly. According to the shape of the pedal and the shape of the pedal, the driving air cylinder is started, the buckling plates are driven to rotate around the adjusting shaft in a telescopic mode, the angle between the buckling plates can be adjusted, and therefore the ejecting block is driven to conduct stopping and clamping, and clamping is firmer.

Description

Technical Field

[0001] The utility model relates to the technical field of torsional test treatment of ladder treads and pedals, and particularly relates to a clamping device for torsional tests of ladder treads and pedals. Background Art

[0002] The advantages of the tread are: it occupies a small space volume of the ladder tool, saves space, reduces the packaging size, and lowers the transportation cost. It is easy to realize the multi-functional design of the ladder tool. The disadvantages of the tread are: the stepping area is small. For long-term operation by users, the standing surface is easy to cause foot discomfort. Due to the small stepping area, users are prone to stepping over or slipping, resulting in accidents. The advantages of the pedal are: the stepping surface is relatively wide, which can make it easier for users to exert force with their feet, allowing them to choose a comfortable working state and being safer to use. The disadvantages of the pedal are: it occupies a large space, and it is not easy to realize the multi-functional design. The overall ladder structure is single. Currently, there are very few ladder tools that can achieve multiple functions and are pedals at the same time. According to different needs, different types of ladders are generally used, making them suitable for different places. During the selection process of ladder production, clamping equipment is needed to fix them for normal test use.

[0003] For example, Chinese Patent Publication No. is CN107073663B, and the technical solution disclosed in this patent document is as follows: The clamping device includes: a locking member (80) that can be inserted into a hole (11) of a workpiece (10); and a clamping rod (70) that engages with the locking member (80) from above. The locking member (80) includes: a base portion (85) that is inserted into the hole (11); and a protruding portion (87) that is disposed above the base portion (85). The relative movement restricting mechanism (M) that restricts the clamping rod (70) from descending relative to the locking member (80) by more than a specified amount allows the outer peripheral surface (85a) of the base portion (85) to descend relative to the inner peripheral surface of the hole (11) at the expanded diameter position of the locking member (80).

[0004] The following problems exist in the prior art:

[0005] 1. Most of the torsional test clamping devices for ladder treads and pedals in the prior art are difficult to be used on both pedals and treads at the same time, and it is difficult to fix two different-shaped plates, resulting in a small application range of the device;

[0006] 2. Most of the torsional test clamping devices for ladder treads and pedals in the prior art are not convenient to fix the clamping device and adjust the support of the feet, making it difficult to adjust the support, resulting in a poor support effect of the device. Utility Model Content

[0007] The utility model provides a clamping device for torsional tests of ladder treads and pedals to solve the problems raised in the above background art.

[0008] To solve the above technical problems, the technical solution adopted by the present utility model is as follows:

[0009] A torsional test clamping device for a ladder tread bar and a tread plate, comprising a base, a support block fixedly connected to the top of the base, a support shaft rotatably connected to the top of the support block, a tension spring rotatably connected to the top of the support block through the support shaft, one end of the tension spring rotatably connected to a connecting shaft, a driving cylinder rotatably connected to the top of the support block through the support shaft, the output end of the driving cylinder rotatably connected to a fastening plate through the connecting shaft, and a top block slidably connected to the outer wall of the fastening plate.

[0010] The outer wall of the fastening plate is rotatably connected to a movable shaft, the outer wall of the movable shaft is rotatably connected to an adjusting rod assembly, the outer wall of the adjusting rod assembly is fixedly connected to a clamping block, a load-bearing block is fixedly connected to the top of the base, and an adjusting shaft is rotatably connected to the top of the load-bearing block.

[0011] An installation groove is formed in the bottom of the base, a threaded cylinder is slidably connected to the bottom of the base, and a threaded foot bolt is threadedly connected to the inner wall of the threaded cylinder.

[0012] A further improvement of the technical solution of the present utility model lies in that: the fastening plates are symmetric with respect to the central axis of the load-bearing block, and the adjusting shaft penetrates through the fastening plates.

[0013] With the above technical solution, the fastening plate in this solution is convenient for resisting the side, making it convenient for clamping.

[0014] A further improvement of the technical solution of the present utility model lies in that: the top of the top block is an arc surface, and the top blocks are symmetric with respect to the central axis of the base.

[0015] With the above technical solution, the arc surface setting of the top block in this solution is convenient for fitting the arc surface of the ladder roller.

[0016] A further improvement of the technical solution of the present utility model lies in that: the inside of the adjusting rod assembly includes an inner rod, a limiting hole, an outer sleeve, a limiting cylinder, a spring and a pull rod, the outer wall of the movable shaft is rotatably connected to the inner rod, the limiting hole is formed in the outer wall of the inner rod, the outer sleeve is fitted and connected to the outer wall of the inner rod, the limiting cylinder is fixedly connected to the outer wall of the outer sleeve, the pull rod is slidably connected to the inner wall of the limiting cylinder, and the spring is fitted and connected to the outer wall of the pull rod.

[0017] With the above technical solution, the adjusting rod assembly in this solution is convenient for adjusting the length and clamping and fixing the top.

[0018] A further improvement of the technical solution of the present utility model lies in that: the outer wall of the inner rod is slidably connected to the inner wall of the outer sleeve, and one end of the outer sleeve is fixedly connected to the outer wall of the clamping block.

[0019] With the above technical solution, the inner rod in this solution is convenient for adjusting the length, making the applicable range wider.

[0020] A further improvement of the technical solution of the present utility model lies in that: the pull rod passes through the spring and the outer sleeve and is mutually fitted with the hole wall of the limit hole.

[0021] With the above technical solution, the pull rod in this solution is convenient for manual operation.

[0022] A further improvement of the technical solution of the present utility model lies in that: the top convex block of the threaded cylinder makes a circular motion along the bottom groove of the base, and the threaded foot bolt penetrates through the threaded cylinder to the inside of the installation groove.

[0023] With the above technical solution, the threaded cylinder in this solution is convenient for supporting the bottom.

[0024] Due to the adoption of the above technical solution, the technical progress achieved by the present utility model compared with the prior art is:

[0025] 1. The present utility model provides a torsion test clamping device for the rungs and treads of a ladder. Through the mutual cooperation of a base, a support block, a support shaft, a tension spring, a connecting shaft, a driving cylinder, a fastening plate, a top block, a movable shaft, an adjusting rod assembly, a clamping block, a load-bearing block, an adjusting shaft, an installation groove, a threaded cylinder and a threaded foot bolt, according to the shapes of the rungs and treads, the driving cylinder is started, so that the telescopic movement drives the fastening plate to rotate around the adjusting shaft, so that the angle between the fastening plates can be adjusted, thereby driving the top block to resist and clamp, making the clamping more firm.

[0026] 2. The present utility model provides a torsion test clamping device for the rungs and treads of a ladder. Through the mutual cooperation of an installation groove, a threaded cylinder and a threaded foot bolt, the threaded cylinder is rotated, so that the threaded cylinder rotates along the bottom groove, making the threaded foot bolt convenient to adjust along the bottom of the base, facilitating adjustment of the support according to the height of the placement position, making the support more firm. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the front sectional view of the present utility model;

[0028] Figure 2 is the schematic diagram of the connection structure between the adjusting rod assembly and the clamping block of the present utility model;

[0029] Figure 3 is the Figure 2 enlarged view at A in the present utility model;

[0030] Figure 4 is the schematic diagram of the connection structure between the fastening plate and the top block of the present utility model.

[0031] In the figure: 1, base; 2, support block; 3, support shaft; 4, tension spring; 5, connecting shaft; 6, driving cylinder; 7, fastening plate; 8, top block; 9, movable shaft; 10, adjusting rod assembly; 11, clamping block; 12, load-bearing block; 13, adjusting shaft; 14, installation groove; 15, threaded cylinder; 16, threaded anchor bolt; 17, inner rod; 18, limiting hole; 19, outer sleeve; 20, limiting cylinder; 21, spring; 22, pull rod. Detailed implementation mode

[0032] The following further describes the present utility model in detail with reference to the embodiments:

[0033] Embodiment 1

[0034] As Figures 1-4 shown, the present utility model provides a torsion test clamping device for ladder rungs and pedals, including a base 1. A support block 2 is fixedly connected to the top of the base 1. A support shaft 3 is connected to the top of the support block 2 by a bearing. A tension spring 4 is connected to the top of the support block 2 by a bearing through the support shaft 3. One end of the tension spring 4 is connected to a connecting shaft 5 by a bearing. A driving cylinder 6 is connected to the top of the support block 2 by a bearing through the support shaft 3. The output end of the driving cylinder 6 is connected to a fastening plate 7 by a bearing through the connecting shaft 5. A top block 8 is slidably connected to the outer wall of the fastening plate 7.

[0035] A movable shaft 9 is connected to the outer wall of the fastening plate 7 by a bearing. An adjusting rod assembly 10 is connected to the outer wall of the movable shaft 9 by a bearing. A clamping block 11 is fixedly connected to the outer wall of the adjusting rod assembly 10. A load-bearing block 12 is fixedly connected to the top of the base 1. An adjusting shaft 13 is connected to the top of the load-bearing block 12 by a bearing.

[0036] An installation groove 14 is provided at the bottom of the base 1. A threaded cylinder 15 is slidably connected to the bottom of the base 1. A threaded anchor bolt 16 is threadedly connected to the inner wall of the threaded cylinder 15.

[0037] In this embodiment, through the mutual cooperation of the base 1, support block 2, support shaft 3, tension spring 4, connecting shaft 5, driving cylinder 6, fastening plate 7, top block 8, movable shaft 9, adjusting rod assembly 10, clamping block 11, load-bearing block 12, adjusting shaft 13, installation groove 14, threaded cylinder 15 and threaded anchor bolt 16, according to the shapes of the rungs and pedals, the driving cylinder 6 is started, so that the telescopic movement drives the fastening plate 7 to rotate around the adjusting shaft 13, so that the angle between the fastening plates 7 can be adjusted, thereby driving the top block 8 to resist and clamp, making the clamping more firm.

[0038] Embodiment 2

[0039] As Figures 1-4 shown, on the basis of Embodiment 1, the present utility model provides a technical solution: Preferably, the fastening plates 7 are symmetric with respect to the central axis of the load-bearing block 12, and the adjusting shaft 13 penetrates through the fastening plates 7.

[0040] In this embodiment, the above technical solution is adopted. The fastening plate 7 in this solution is convenient for resisting the side surface, so that it is convenient for clamping. By the mutual cooperation of the installation groove 14, the threaded cylinder 15 and the threaded foot bolt 16, the threaded cylinder 15 is rotated, so that the threaded cylinder 15 rotates along the bottom groove, so that the threaded foot bolt 16 is convenient to adjust along the bottom of the base 1, and it is convenient to adjust the support according to the height of the placement position, making the support more firm.

[0041] Embodiment 3

[0042] As Figures 1-4 shown, on the basis of Embodiment 1 and Embodiment 2, the present utility model provides a technical solution: Preferably, the top of the top block 8 is an arc surface, and the top block 8 is symmetric along the central axis of the base 1.

[0043] In this embodiment, the above technical solution is adopted. The arc surface setting of the top block 8 in this solution is convenient for fitting the arc surface of the ladder roller.

[0044] Further, the inside of the adjusting rod assembly 10 includes an inner rod 17, a limiting hole 18, an outer sleeve 19, a limiting cylinder 20, a spring 21 and a pull rod 22. The outer wall of the movable shaft 9 is connected to the inner rod 17 by a bearing. The outer wall of the inner rod 17 is provided with a limiting hole 18. The outer wall of the inner rod 17 is attached to the outer sleeve 19. The outer wall of the outer sleeve 19 is fixedly connected to the limiting cylinder 20. The inner wall of the limiting cylinder 20 is slidably connected to the pull rod 22. The outer wall of the pull rod 22 is attached to the spring 21.

[0045] In this embodiment, the above technical solution is adopted. The adjusting rod assembly 10 in this solution is convenient for adjusting the length and clamping and fixing the top.

[0046] Preferably, the outer wall of the inner rod 17 is slidably connected to the inner wall of the outer sleeve 19, and one end of the outer sleeve 19 is fixedly connected to the outer wall of the clamping block 11.

[0047] In this embodiment, the above technical solution is adopted. The inner rod 17 in this solution is convenient for adjusting the length, making the applicable range wider.

[0048] Further, the pull rod 22 passes through the spring 21 and the outer sleeve 19 and is fitted with the hole wall of the limiting hole 18.

[0049] In this embodiment, the above technical solution is adopted. The pull rod 22 in this solution is convenient for manual operation.

[0050] Furthermore, the top convex block of the threaded cylinder 15 makes a circular motion along the bottom groove of the base 1, and the threaded foot bolt 16 penetrates through the threaded cylinder 15 to the inside of the installation groove 14.

[0051] In this embodiment, adopting the above technical solution, the threaded cylinder 15 in the solution facilitates the support of the bottom.

[0052] Next, the working principle of the torsion test clamping device for the ladder tread and pedal will be specifically described.

[0053] As Figures 1-4 shown, according to the shapes of the tread and the pedal, the driving cylinder 6 is started, so that the telescopic movement drives the fastening plate 7 to rotate around the adjusting shaft 13, so that the angle between the fastening plates 7 can be adjusted, thereby driving the top block 8 to resist and clamp. And the top block 8 slides and adjusts along the top groove of the fastening plate 7 to adjust the clamping position. At the same time, one end is pressed, and the other end of the tension spring 4 plays a buffering role, so that the pressing force will not damage the clamped object. At the same time, the top adjusting rod assembly 10 rotates around the movable shaft 9 to facilitate the adjustment of the pressing position at the top. And the shafts at this place are all threaded positioning shafts with firm structures. The pull rod 22 is pulled to drive the spring 21 to be compressed, so as to adjust the inner rod 17 along the outer sleeve 19 and change the top pressing position. The threaded cylinder 15 is rotated so that the threaded cylinder 15 rotates along the bottom groove, so that the threaded foot bolt 16 is convenient to adjust along the bottom of the base 1, and is convenient to adjust the support according to the height of the placement position.

[0054] The above has generally described the present invention in detail. However, based on the present invention, some modifications or improvements can be made, which are obvious to those of ordinary skill in the art. Therefore, any modifications or improvements made without departing from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. A torsion test clamping device for ladder rungs and pedals, comprising a base (1), characterized in that: The top of the base (1) is fixedly connected to a support block (2), the top bearing of the support block (2) is connected to a support shaft (3), the top of the support block (2) is connected to a tension spring (4) via a bearing of the support shaft (3), one end of the tension spring (4) is connected to a connecting shaft (5) via a bearing, the top of the support block (2) is connected to a drive cylinder (6) via a bearing of the support shaft (3), the output end of the drive cylinder (6) is connected to a buckle plate (7) via a bearing of the connecting shaft (5), and the outer wall of the buckle plate (7) is slidably connected to a top block (8); The outer wall bearing of the buckle plate (7) is connected to a movable shaft (9), the outer wall bearing of the movable shaft (9) is connected to an adjusting rod assembly (10), the outer wall of the adjusting rod assembly (10) is fixedly connected to a clamping block (11), the top of the base (1) is fixedly connected to a bearing block (12), and the top bearing of the bearing block (12) is connected to an adjusting shaft (13); The bottom of the base (1) is provided with a mounting groove (14), the bottom of the base (1) is slidably connected to a threaded cylinder (15), and the inner wall of the threaded cylinder (15) is threadedly connected to a threaded foot bolt (16).

2. A torsion test clamping device for ladder rungs and pedals according to claim 1, characterized in that: The buckling plates (7) are symmetrical to each other along the central axis of the load-bearing block (12), and the adjustment shaft (13) passes through the buckling plates (7).

3. A torsion test clamping device for ladder rungs and pedals according to claim 1, characterized in that: The top of the top block (8) is a curved surface, and the top blocks (8) are symmetrical with each other along the central axis of the base (1).

4. A torsion test clamping device for ladder rungs and pedals according to claim 1, characterized in that: The interior of the regulating rod assembly (10) comprises an inner rod (17), a limiting hole (18), an outer sleeve (19), a limiting cylinder (20), a spring (21) and a pull rod (22); the outer wall of the movable shaft (9) is bearing-connected to the inner rod (17); the outer wall of the inner rod (17) is provided with a limiting hole (18); the outer wall of the inner rod (17) is fittedly connected to the outer sleeve (19); the outer wall of the outer sleeve (19) is fixedly connected to the limiting cylinder (20); the inner wall of the limiting cylinder (20) is slidably connected to the pull rod (22); and the outer wall of the pull rod (22) is fittedly connected to the spring (21).

5. A torsion test clamping device for ladder rungs and pedals according to claim 4, characterized in that: The outer wall of the inner rod (17) is slidably connected to the inner wall of the outer sleeve (19), and one end of the outer sleeve (19) is fixedly connected to the outer wall of the clamping block (11).

6. A torsion test clamping device for ladder rungs and pedals according to claim 4, characterized in that: The pull rod (22) penetrates the spring (21) and the outer sleeve (19) and is interlocked with the hole wall of the limiting hole (18).

7. A torsion test clamping device for ladder rungs and pedals according to claim 1, characterized in that: The top protrusion of the threaded barrel (15) moves in a circular motion along the bottom groove of the base (1), and the threaded foot bolt (16) penetrates the threaded barrel (15) to the inside of the installation groove (14).

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