Two-ton aluminum alloy chain tightener

Abstract

The utility model provides a two-ton aluminum alloy chain tightener. The problems that after an existing tightener is used, a ratchet wheel needs to be reversely driven to rotate through a handle and then a chain is retreated, at the moment, an operator needs to press a retaining pawl all the time and retreat after the ratchet wheel is loosened, and use is inconvenient are solved. In the utility model, in the process of driving the ratchet wheel to rotate by the operating handle, the retaining pawl is always propped against the ratchet wheel, and in the process of retreating, after the retaining pawl is driven to rotate by the push button and the retaining pawl is separated from the ratchet wheel, the retaining pawl is clamped on the push button through the buckle plate on the elastic sheet to complete the locking of the push button; the retaining pawl is always separated from the ratchet wheel, the chain can be conveniently retreated through the operation handle, operation is convenient, after retreating is completed, the elastic piece is pressed in the direction of the shell, the buckle plate on the elastic piece is separated from the push button, the retaining pawl rotates in the direction of the ratchet wheel and then abuts against the ratchet wheel again, and operation is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of wire tensioners, in particular to a two-ton aluminum alloy chain wire tensioner. Background Art

[0002] The tensioner is used to tighten the conductor during the construction of overhead line laying. When using it, first loosen the wire rope or galvanized iron wire on the tensioner and fix it on the cross arm, clamp the conductor with a wire clamp, and then turn the special wrench to gradually wind the wire rope or galvanized iron wire around the drum to tighten the conductor. The tensioner is widely used in infrastructure projects such as construction, roads, bridges, metallurgy, and mining, and plays a huge engineering role.

[0003] During actual use, the chain is driven to rotate by turning the handle, and the ratchet is clamped by the anti-retraction pawl to prevent the ratchet from retracting. After use, the ratchet needs to be driven in the opposite direction by the handle to retract the chain. At this time, the operator needs to always press the anti-retraction pawl and retract the ratchet after releasing it. This is inconvenient to use, and there is room for improvement in the prior art. Summary of the invention

[0004] In view of the above existing situation, the utility model provides a two-ton aluminum alloy chain tensioner, which is characterized in that it includes a shell, a gear shaft rotatably arranged in the shell, a chain wound on the gear shaft, a ratchet and a handle wheel fixedly arranged on the gear shaft in sequence, the shell is gourd-shaped, an operating handle is rotatably arranged on the handle wheel, a steering ratchet for locking the operating handle and the handle wheel is rotatably arranged on the operating handle, a stop ratchet for locking the ratchet is movably arranged on the shell, a push button for driving the stop ratchet to rotate is fixedly arranged on the periphery of the stop ratchet, and the A spring sheet for engaging the push button is fixedly arranged on the shell, a certain gap is left between the spring sheet and the shell, and the spring sheet rests on the end face of the push button facing the shell, a buckle plate for engaging the push button is fixedly arranged on the end of the spring sheet facing the push button, a sprocket is rotatably arranged in the shell, the chain is wound around the sprocket, a large gear which is always meshed with the gear shaft is fixedly arranged on the sprocket, a movable groove is opened in the shell, the lower end of the large gear is located in the movable groove, and the movable groove is located on the bottom of the shell on the side facing the operating handle.

[0005] Preferably, the steering pawl is rotatably arranged on the operating handle via a rotating shaft, and both ends of the steering pawl are respectively provided with a tooth for being engaged with the handle wheel.

[0006] Preferably, a hand wheel and a fixed wheel are respectively provided on both sides of the operating handle facing the handle wheel.

[0007] Preferably, a static hook for hanging the shell is provided at the upper end of the shell.

[0008] Preferably, a movable hook for hanging articles is provided at one end of the chain, and a stop ring is provided at the other end of the chain.

[0009] Preferably, the movable hook and the static hook are respectively provided with a baffle to prevent falling off.

[0010] Preferably, a shaft sleeve is movably arranged in the housing and sleeved on the above-mentioned gear shaft, the gear shaft is provided with friction plates abutting against both sides of the above-mentioned ratchet, the gear shaft is sleeved with a friction disk matching with the above-mentioned friction plates, and the above-mentioned shaft sleeve is sleeved on the friction disk.

[0011] Compared with the prior art, in the utility model, during the process of the operating handle driving the above-mentioned ratchet to rotate, the back-stop pawl always rests on the above-mentioned ratchet; during the retraction process, the back-stop pawl is driven to rotate by the push button to disengage the back-stop pawl from the ratchet; the push button is locked by the buckle plate on the spring sheet being clamped on the push button, so that the back-stop pawl is always disengaged from the ratchet; the chain can be conveniently retracted by the operating handle, which is relatively convenient to operate; and after the retraction is completed, the buckle plate on the spring sheet is pressed toward the shell body to disengage the push button; then the back-stop pawl rotates in the direction of the ratchet and rests on the ratchet again; the operation is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is the overall structural view of the utility model when placed vertically;

[0013] Figure 2 It is the structural explosion diagram of the utility model;

[0014] Figure 3 It is a schematic diagram of the structure inside the shell;

[0015] Figure 4 for Figure 1 Enlarged view of point A in the middle.

[0016] Markings in the figure: 1. Housing; 2. Gear shaft; 3. Chain; 4. Ratchet; 5. Handle wheel; 6. Operating handle; 7. Steering pawl; 8. Anti-retraction pawl; 9. Push button; 10. Spring piece; 11. Buckle plate; 12. Rotating shaft; 13. Card tooth; 14. Handwheel; 15. Fixed wheel; 16. Sprocket; 17. Large gear; 18. Static hook; 19. Moving hook; 20. Anti-retraction ring; 21. Block plate; 22. Movable groove; 23. Bushing; 24. Friction plate; 25. Friction disc. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0018] like Figure 1-4 As shown, a two-ton aluminum alloy chain tensioner includes a housing 1, a gear shaft 2 rotatably arranged in the housing 1, a chain 3 wound on the gear shaft 2, a ratchet 4 and a handle wheel 5 fixedly arranged on the gear shaft 2 in sequence, the housing 1 is gourd-shaped, a sprocket 16 is rotatably arranged in the housing 1, the chain 3 is wound on the sprocket 16, a large gear 17 that is always meshed with the gear shaft 2 is fixedly arranged on the sprocket 16, and the large gear 17 with a large number of teeth is driven to rotate by a gear shaft 2 with a small number of teeth, thereby increasing the torque and saving more effort during operation. A movable groove 22 is provided in the housing 1, the lower end of the large gear 17 is located in the movable groove 22, and the movable groove 22 is located on the bottom of the housing 1 facing the side of the operating handle 6, and the large gear 17 is given way by the movable groove 22 provided in the housing 1, thereby greatly reducing the overall volume of the housing 1. An operating handle 6 is rotatably provided on the handle wheel 5, and a steering pawl 7 for locking the operating handle 6 and the handle wheel 5 is rotatably provided on the operating handle 6. A stop pawl 8 for locking the ratchet 4 is movably provided on the shell 1, and a push button 9 for driving the stop pawl 8 to rotate is fixedly provided on the periphery of the stop pawl 8, and a spring piece 10 for clamping the push button 9 is fixedly provided on the shell 1, and a certain gap is left between the spring piece 10 and the shell 1, and the spring piece 10 abuts against the end face of the push button 9 facing the shell 1, and a buckle plate 11 for clamping the push button 9 is fixedly provided on the end of the spring piece 10 facing the push button 9. During the process of driving the ratchet 4 to rotate by the operating handle 6, the backstop pawl 8 always rests on the ratchet 4. During the retraction process, the backstop pawl 8 is driven to rotate by the push button 9 to disengage the backstop pawl 8 from the ratchet 4. The push button 9 is locked by the buckle plate 11 on the spring sheet 10 being engaged with the push button 9, so that the backstop pawl 8 is always disengaged from the ratchet 4. The chain 3 can be easily retracted by the operating handle 6. The operation is relatively convenient. After the retraction is completed, the spring sheet 10 is pressed toward the direction of the housing 1 to disengage the buckle plate 11 on the spring sheet 10 from the push button 9. After the backstop pawl 8 rotates toward the ratchet 4, it rests on the ratchet 4 again. The operation is simple.

[0019] A shaft sleeve 23 is movably provided in the housing 1 and sleeved on the gear shaft 2. The gear shaft 2 is provided with friction plates 24 that abut against both sides of the ratchet 4. A friction disk 25 that matches the friction plates 24 is sleeved on the gear shaft 2, and the shaft sleeve 23 is sleeved on the friction disk 25.

[0020] The steering pawl 7 is rotatably arranged on the operating handle 6 via a rotating shaft 12, and a latching tooth 13 for latching on the handle wheel 5 is respectively provided at both ends of the steering pawl 7, so that the operating handle 6 can realize the function of bidirectional rotation to drive the handle wheel 5 to rotate. A hand wheel 14 and a fixed wheel 15 are respectively provided on both sides of the operating handle 6 facing the handle wheel 5. A static hook 18 for hanging the housing 1 is provided at the upper end of the housing 1. A dynamic hook 19 for hanging articles is provided at one end of the chain 3, and a stop ring 20 is provided at the other end of the chain 3. A baffle 21 for preventing falling off is respectively provided on the dynamic hook 19 and the static hook 18. After hanging, the baffle 21 is used to prevent falling off, and the safety is strong.

[0021] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A two-ton aluminum alloy chain tensioner, characterized in that: The invention comprises a housing (1), a gear shaft (2) rotatably arranged in the housing (1), a chain (3) wound around the gear shaft (2), a ratchet (4) and a handle wheel (5) fixedly arranged on the gear shaft (2) in sequence, the housing (1) being gourd-shaped, an operating handle (6) rotatably arranged on the handle wheel (5), a steering pawl (7) rotatably arranged on the operating handle (6) for locking the operating handle (6) and the handle wheel (5), a stop pawl (8) movably arranged on the housing (1) for locking the ratchet (4), a push button (9) for driving the stop pawl (8) to rotate fixedly arranged on the outer periphery of the stop pawl (8), a spring sheet (10) for engaging the push button (9) fixedly arranged on the housing (1), the spring sheet (10) for engaging the push button (9) fixedly arranged on the housing (1), the spring sheet (11) for locking ... A certain gap is left between the spring sheet (10) and the housing (1), and the spring sheet (10) abuts against the end surface of the push button (9) facing the housing (1). A buckle plate (11) for clamping the push button (9) is fixedly provided at one end of the spring sheet (10) facing the push button (9). A sprocket (16) is rotatably provided in the housing (1), the chain (3) is wound around the sprocket (16), a large gear (17) which is always meshed with the gear shaft (2) is fixedly provided on the sprocket (16), a movable groove (22) is provided in the housing (1), the lower end of the large gear (17) is located in the movable groove (22), and the movable groove (22) is located at the bottom of the housing (1) on the side facing the operating handle (6).

2. A two-ton aluminum alloy chain tensioner according to claim 1, characterized in that: The steering pawl (7) is rotatably arranged on the operating handle (6) via a rotating shaft (12), and a latching tooth (13) for latching onto the handle wheel (5) is respectively provided at both ends of the steering pawl (7).

3. A two-ton aluminum alloy chain tensioner according to claim 2, characterized in that: A hand wheel (14) and a fixed wheel (15) are respectively provided on both sides of one end of the operating handle (6) facing the handle wheel (5).

4. A two-ton aluminum alloy chain tensioner according to claim 1, characterized in that: The upper end of the shell (1) is provided with a static hook (18) for hanging the shell (1).

5. A two-ton aluminum alloy chain tensioner according to claim 4, characterized in that: One end of the chain (3) is provided with a movable hook (19) for hanging articles, and the other end of the chain (3) is provided with a stop ring (20).

6. A two-ton aluminum alloy chain tensioner according to claim 5, characterized in that: The movable hook (19) and the static hook (18) are each provided with a blocking piece (21) for preventing them from falling off.

7. A two-ton aluminum alloy chain tensioner according to claim 1, characterized in that: A shaft sleeve (23) sleeved on the gear shaft (2) is movably arranged in the housing (1); a friction plate (24) abutting against two sides of the ratchet (4) is arranged on the gear shaft (2); a friction disk (25) matching the friction plate (24) is sleeved on the gear shaft (2); and the shaft sleeve (23) is sleeved on the friction disk (25).

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