Electric rope tightening device for variable-amplitude steel wire rope of tower crane

Abstract

The utility model discloses a tower crane variable amplitude steel wire rope electric rope tightening device which comprises a load-carrying trolley, a ratchet wheel assembly, a chain and a driving assembly, the ratchet wheel assembly is installed on the load-carrying trolley through an installation pin shaft and a shaft sleeve, two limiting pin shafts are arranged on the ratchet wheel assembly, one limiting pin shaft is used for fixing the ratchet wheel assembly, and the other limiting pin shaft is used for fixing the chain. A mounting hole of the other limiting pin shaft is a long-strip-shaped notch and plays a role of a pawl, so that the ratchet wheel assembly is prevented from being pulled by the variable-amplitude steel wire rope to rotate reversely; the variable-amplitude steel wire rope is wound on the ratchet wheel assembly and clamped on the ratchet wheel assembly through a wedge, the driving device is installed on the load-carrying trolley, and the driving device is connected with the ratchet wheel assembly through a chain. The structure is simple and the use is convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to tower crane supporting facilities field especially, relate to a tower crane amplitude wire rope electric tight rope device. BACKGROUND

[0002] Tower crane is one of the main hoisting construction equipment in building industry and modern industry, and is widely used in building industry project engineering construction. Amplitude wire rope is an important component of tower crane, and the amplitude mechanism drives the load trolley through two amplitude wire ropes, so that the amplitude action of the tower crane is realized. The amplitude wire rope will sag under the influence of its own gravity during installation. A ratchet device is usually arranged on the load trolley, and manual tightening is used to reduce the sagging amplitude. However, the manual force is limited and often cannot achieve good tightening effect. Especially when lifting heavy objects, one amplitude wire rope is tightened, and the other wire rope is more severely sagged, which causes the load trolley to start, brake and be out of synchronization with the amplitude mechanism, resulting in unstable operation and impact. In severe cases, the amplitude wire rope rope protection device is triggered by mistake, which collides with the jib and causes accidents. SUMMARY

[0003] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a tower crane amplitude wire rope electric tight rope device, which is simple in structure and convenient to use.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a tower crane amplitude wire rope electric tight rope device, comprising a load trolley, a ratchet assembly, a chain, and a drive assembly. The ratchet assembly is installed on the load trolley through mounting pins and shaft sleeves, and two limiting pins are arranged on the ratchet assembly. One of the limiting pins is used to fix the ratchet assembly, and the mounting hole of the other limiting pin is a long slot, which acts as a pawl to prevent the ratchet assembly from being reversed by the amplitude wire rope. The amplitude wire rope is wound on the ratchet assembly and clamped on the ratchet assembly by a wedge. The drive device is installed on the load trolley, and the drive device and the ratchet assembly are connected by a chain.

[0005] In the above technical scheme, the drive device is connected to the load trolley by a bolt pair, and the mounting hole of the drive device is a long slot, which is used to adjust the tightness of the chain.

[0006] In the above technical scheme, the drive device comprises a low-speed high-torque drive motor and a driving sprocket. The driving sprocket is installed on the driving end of the drive motor by a key and a locking screw.

[0007] In the above technical scheme, the ratchet assembly comprises a ratchet structure and a driven sprocket. The driven sprocket is installed on the side surface of the ratchet structure by a nut.

[0008] In the above technical scheme, the mounting pin shaft and the limiting pin shaft for fixing the ratchet assembly are both provided with an open pin, the limiting pin for playing the role of pawl is provided with an open pin and a flat washer.

[0009] The utility model discloses the effective result is: through low speed high torque motor, adopt small drive sprocket big driven sprocket chain drive further improve driving moment, drive ratchet assembly rotation will amplitude wire rope be wound on ratchet assembly to reach the purpose of tight rope, simultaneously through limiting pin shaft makes ratchet assembly only one -way movement, this tower crane amplitude wire rope electric tight rope device solves the problem of insufficient power of manual tight rope, avoids the bad consequence after amplitude wire rope slack. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the structure schematic diagram of the utility model.

[0011] Figure 2 It is Figure 1 A-A view of.

[0012] Figure 3 It is Figure 1 The enlarged view of I in.

[0013] Figure 4 It is Figure 1 The structure schematic diagram of ratchet assembly in.

[0014] Figure 5 It is Figure 1 The structure schematic diagram of motor assembly in.

[0015] Among them: among them: 1. load trolley, 2. ratchet assembly, 3. amplitude wire rope, 4. drive assembly, 5. shaft sleeve, 6. wedge, 7. mounting pin shaft, 8. open pin, 9. fixed limiting pin shaft, 10. limiting pin shaft, 11, flat washer, 12. chain, 13. bolt pair, 14. ratchet structure, 15. driven sprocket, 16. nut, 17. drive motor, 18. check screw, 19. drive sprocket, 20. flat key. DETAILED DESCRIPTION

[0016] The utility model will be further described in connection with the drawings and specific embodiment.

[0017] For example, Figures 1 to 5The electric tight rope device of the tower crane variable amplitude steel wire rope comprises a load trolley 1, a ratchet assembly 2, a chain 12 and a driving assembly 4.

[0018] In the above technical solution, the driving device 4 is connected with the load trolley 1 through a bolt pair 13, and the mounting hole of the driving device 4 is a long slot, which is used for adjusting the tightness of the chain 12.

[0019] In the above technical solution, the driving device 4 comprises a low-speed high-torque driving motor 17 and a driving sprocket 19, and the driving sprocket 19 is installed on the driving end of the driving motor 17 through a key 20 and a clamping screw 18.

[0020] In the above technical solution, the ratchet assembly 2 comprises a ratchet structure 14 and a driven sprocket 15, and the driven sprocket 15 is installed on the side of the ratchet structure 14 through a nut 16.

[0021] The diameter of the driving sprocket 19 is smaller than that of the driven sprocket 15, so as to further improve the driving torque and drive the ratchet assembly to rotate, so that the variable amplitude steel wire rope is wound on the ratchet assembly to achieve the purpose of tight rope.

[0022] In the above technical solution, the mounting pin 7, the fixed limiting pin 9 and the pawl limiting pin 10 are provided with a split pin 8, and the pawl limiting pin 10 is further provided with a flat washer.

[0023] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A tower crane luffing wire rope electric tightener, characterized in that: The utility model relates to a load carrier, a ratchet assembly, a chain, a driving assembly, the ratchet assembly is installed on the load carrier through mounting pin shaft and shaft sleeve, and is equipped with two limiting pin shafts on the ratchet assembly, one limiting pin shaft is used for fixing the ratchet assembly, and the mounting hole of the other limiting pin shaft is long slot, plays the role of pawl, prevents the ratchet assembly from being reversed by the amplitude wire rope, the amplitude wire rope is wound on the ratchet assembly and is clamped on the ratchet assembly through wedge, the driving device is installed on the load carrier, and the driving device is connected with the ratchet assembly through the chain.

2. The tower crane luffing wire rope electric tightener of claim 1, wherein: The driving device is connected with the load carrier through bolt pair, and the mounting hole of the driving device is long slot, which is used for adjusting the tightness of the chain.

3. The electric wire-tying device for the luffing wire rope of a tower crane according to claim 1, characterized in that: The driving device includes a low-speed high-torque driving motor and a driving sprocket, and the driving sprocket is installed on the driving end of the driving motor through a key and a clamping screw.

4. The electric wire-tying device for the luffing wire rope of a tower crane according to claim 1, characterized in that: The ratchet assembly includes a ratchet structure and a driven sprocket, and the driven sprocket is installed on the side of the ratchet structure through a nut.

5. The electric wire-tying device for the luffing wire rope of a tower crane according to claim 1, characterized in that: Open pins are arranged on the mounting pin shaft and the limiting pin shaft for fixing the ratchet assembly, and open pins and flat pads are arranged on the limiting pin shaft for playing the role of pawl.

Images