Manually-driven telescopic approaching suspended working platform

By using a manually driven telescopic approach gantry, and utilizing an RV gearbox and chain drive mechanism, combined with a transmission chain system and a counterweight traction system, the problems of large mass, complex operation, high cost, and safety risks of existing telescopic gantry have been solved, achieving steady-state balance and safety of the boom.

CN223674190UActive Publication Date: 2025-12-16WUXI WATSOND MECHANICAL TECH
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Patent Information

Application Number
CN202423236986.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-26
Publication Date
2025-12-16
Estimated Expiration
2034-12-26

AI Technical Summary

Technical Problem

Existing telescopic approach gantry boats suffer from problems such as large mass, complex operation, high cost, difficulty in balance control, and safety risks.

Method used

The manually driven telescopic approaching gantry uses an RV gearbox and chain drive mechanism, combined with a transmission chain system and a counterweight traction system, to achieve steady-state balance at both ends of the boom, reducing power requirements and simplifying the operation process.

Benefits of technology

It achieves steady-state balance during boom extension and retraction, avoids excessive stress or overturning at individual lifting points, reduces costs and insulation protection requirements for wire ropes, and improves operational safety and efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to the technical field of hoisting equipment, and relates to a manually-driven telescopic approaching working platform. Comprising a fixed cantilever, a telescopic cantilever with the rear end connected to the fixed cantilever in a sliding mode, an RV reduction gearbox fixed to the front end of the telescopic cantilever, a fixed suspension point arranged at the front end of the telescopic cantilever, a suspended working platform body installed at the fixed suspension point, a movable balancing weight connected to the fixed cantilever in a sliding mode, a transmission chain system and a balance weight traction system. A hand wheel is arranged at the input end of the RV reduction gearbox, a chain driving mechanism is arranged at the output end of the RV reduction gearbox, and in the process that the chain driving mechanism enables the telescopic cantilever to stretch out through the transmission chain system, the counterweight traction system drives and drags the movable counterweight block to move on the fixed cantilever, so that the two ends of the telescopic cantilever are kept stable and balanced; in the telescopic process of the suspension arm, the weights of the two ends of a suspension point of the suspension arm are balanced by adjusting the position of the balancing weight, and the situation that a single suspension point is too large in stress or the suspension arm retracts to be close to a suspended working platform and is overturned is avoided.
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Description

TECHNICAL FIELD

[0001] The utility model belongs to hoisting machinery equipment technical field relates to a manual drive's telescopic approach crane. BACKGROUND

[0002] The concave and arc surface modeling of the existing building or structure design is more and more, and the telescopic approach crane is more and more widely used, and the type of telescopic approach crane is various. According to the analysis of the existing domestic market, the main type of telescopic approach crane is as follows: (1) fixed counterweight is used, the mass of this type of telescopic approach crane is very large, which has a great influence on the carrying capacity of the suspension equipment and the manufacturing cost, and has been gradually eliminated; (2) the movement of the counterweight and the telescopic crane is controlled separately, the crane is telescoped by a certain distance, and then the counterweight is adjusted backward by a certain distance, and the operation is repeated, which requires high operation personnel, is easy to misoperate, affects the balance, has great risk, and has low work efficiency; (3) the movement of the counterweight and the telescopic crane is controlled synchronously by two motors, which can well solve the balance problem in the telescopic approach process of the crane, but the control program is complex, the cost is high, and 220V voltage needs to be transmitted through the steel wire rope, which has high requirements for the insulation protection of the steel wire rope. SUMMARY

[0003] The utility model provides a manual drive's telescopic approach crane for above -mentioned problem, this crane telescopic whole process is through the manual control of operating personnel, control program is simple, the requirement of low power, cost is smaller, can in the telescopic process of the jib through the position of the counterweight block is adjusted, make the jib both ends weight balance, avoid the emergence single hoisting point stress too big or telescopic approach crane overturning situation.

[0004] According to the technical scheme of the utility model: a manual drive's telescopic approach crane, including the fixed cantilever connected on the hoisting equipment, the telescopic cantilever of rear end sliding connection in fixed cantilever, the RV reduction gearbox of fixed in telescopic cantilever front end, set up in telescopic cantilever front end's fixed suspension point, the crane body of installation in fixed suspension point, the mobile counterweight block of sliding connection in fixed cantilever, and transmission chain system and counterweight traction system, the input of RV reduction gearbox is provided with hand wheel, the output of RV reduction gearbox is provided with chain drive mechanism, the chain drive mechanism makes telescopic cantilever stretch out in transmission chain system, and counterweight traction system drives the mobile counterweight block to move on fixed cantilever, so that the both ends of telescopic cantilever keep steady balance during the process.

[0005] As a further improvement of the utility model, the chain drive mechanism includes a driving shaft connected to the output shaft of the RV reduction gearbox, and a driving sprocket arranged on the driving shaft. The transmission chain system is connected to the driving sprocket.

[0006] As a further improvement of the utility model, the transmission chain system comprises a transmission chain, a first transmission sprocket fixed on the fixed cantilever, a second transmission sprocket fixed on the rear end of the telescopic cantilever, one end of the transmission chain is fixed on the front end of the fixed cantilever, the other end of the transmission chain is fixed on the rear end of the fixed cantilever after sequentially passing through the first transmission sprocket, the second transmission sprocket and the driving sprocket.

[0007] As a further improvement of the utility model, the fixed cantilever is slidably connected with a sliding frame, the moving counterweight is fixed on the rear end of the sliding frame, the sliding frame is provided with a first connecting seat and a second connecting seat; the counterweight traction system comprises a first steel wire rope and a second steel wire rope, a first guide wheel is fixed close to the front end of the fixed cantilever, a second guide wheel is fixed close to the rear end of the fixed cantilever, a third guide wheel and a fourth guide wheel are symmetrically arranged on the fixed cantilever, a gap is left between the third guide wheel and the fourth guide wheel, one end of the first steel wire rope and the second steel wire rope is fixed on the rear end of the telescopic cantilever together, the other end of the first steel wire rope is fixedly connected on the first connecting seat after passing through the third guide wheel and the first guide wheel, the other end of the second steel wire rope is fixedly connected on the second connecting seat after passing through the fourth guide wheel and the second guide wheel.

[0008] As a further improvement of the utility model, the fixed cantilever is slidably connected with a sliding frame, the moving counterweight is fixed on the rear end of the sliding frame, the sliding frame is provided with a first connecting seat and a second connecting seat; the counterweight traction system comprises a first steel wire rope and a second steel wire rope, a first guide wheel is fixed close to the front end of the fixed cantilever, a second guide wheel is fixed close to the rear end of the fixed cantilever, a third guide wheel and a fourth guide wheel are symmetrically arranged on the fixed cantilever, a gap is left between the third guide wheel and the fourth guide wheel, one end of the first steel wire rope and the second steel wire rope is fixed on the rear end of the telescopic cantilever together, the other end of the first steel wire rope is fixedly connected on the first connecting seat after passing through the third guide wheel and the first guide wheel, the other end of the second steel wire rope is fixedly connected on the second connecting seat after passing through the fourth guide wheel and the second guide wheel.

[0009] As a further improvement of the utility model, the fixed cantilever is provided with four parking supports.

[0010] As a further improvement of the utility model, the front end of the telescopic cantilever is provided with an upwardly-inclined top-limiting rod.

[0011] The technical effect of the utility model lies in that: when in use, the staff in the crane ship manually rotates the hand wheel, the hand wheel drives the chain drive mechanism through the RV reduction gearbox, the chain drive mechanism drives the telescopic cantilever to extend through the transmission chain system, meanwhile, the counterweight traction system drives the traction moving counterweight to move on the fixed cantilever, so that the telescopic cantilever keeps stable balance at both ends, the weight balance of the crane arm is kept during the telescopic process, the situation that a single lifting point is subjected to excessive force or the telescopic crane ship is tilted is avoided; in addition, the telescopic driving of the crane ship is changed into a manual type, the requirement for electricity is low, the requirement for the steel wire rope is reduced, the motor is saved, and the cost is also greatly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0012] Fig. 1 It is a structural schematic view when the telescopic cantilever is retracted in the utility model.

[0013] Fig. 2 It is a plan view when the telescopic cantilever is extended in the utility model.

[0014] Fig. 3 Figure 1 is a structural schematic diagram of the telescopic cantilever in the utility model. DETAILED DESCRIPTION

[0015] The specific embodiments of the utility model will be further described below with reference to the accompanying drawings.

[0016] In order to make the person skilled in the art better understand the utility model scheme, the technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the utility model. The described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the utility model.

[0017] Figs. 1-3 In the utility model, the utility model is a hand-driven telescopic close to the crane, including the fixed cantilever 9 connected on the hoisting equipment, the telescopic cantilever 7 of the rear end sliding connection on the fixed cantilever 9, the RV reduction box 5 fixed at the front end of the telescopic cantilever 7, the fixed suspension point set at the front end of the telescopic cantilever 7, the crane body 1 installed at the fixed suspension point, the moving counterweight 12 slidingly connected on the fixed cantilever 9, and the transmission chain system and the counterweight traction system, the input end of the RV reduction box 5 is provided with the hand wheel 4, the output end of the RV reduction box 5 is provided with the chain drive mechanism 6, the chain drive mechanism 6 makes the telescopic cantilever 7 extend in the process through the transmission chain system, the counterweight traction system drives the traction moving counterweight 12 to move on the fixed cantilever 9, so that the both ends of the telescopic cantilever 7 keep stable balance.

[0018] When using, the staff in the crane manually rotates the hand wheel 4, the hand wheel 4 drives the chain drive mechanism 6 through the RV reduction box 5, the chain drive mechanism 6 makes the telescopic cantilever 7 extend through the transmission chain system, and the counterweight traction system drives the traction moving counterweight 12 to move on the fixed cantilever 9, so that the both ends of the telescopic cantilever 7 keep stable balance, prevent the fixed suspension point from being tilted due to excessive force.

[0019] The chain drive mechanism 6 includes the driving shaft connected on the output shaft of the RV reduction box 5, the driving sprocket set on the driving shaft, and the transmission chain system connected with the driving sprocket. In the embodiment, the hand wheel 4 drives the driving shaft through the RV reduction box 5, and the driving shaft drives the transmission chain system through the driving sprocket, so that the telescopic cantilever 7 extends or retracts.

[0020] The transmission chain system comprises a transmission chain 801, a first transmission sprocket 802 fixed on the fixed cantilever 9, a second transmission sprocket 803 fixed on the rear end of the telescopic cantilever 7, one end of the transmission chain 801 is fixed on the front end of the fixed cantilever 9, and the other end of the transmission chain 801 is fixed on the rear end of the fixed cantilever 9 after sequentially passing through the first transmission sprocket 802, the second transmission sprocket 803 and the driving sprocket; in this embodiment, the hand wheel 4 drives the driving shaft through the RV speed reducer 5, the driving shaft drives the transmission chain 801 through the driving sprocket, and the chain between the first transmission sprocket 802 and the second transmission sprocket 803 is gradually shortened through the traction force of the two ends of the transmission chain 801, so that the telescopic cantilever 7 is driven to extend or retract from the front end of the fixed cantilever 9.

[0021] A sliding bracket 91 is slidably connected to the fixed cantilever 9, the moving counterweight 12 is fixed to the rear end of the sliding bracket 91, and the sliding bracket 91 is provided with a first connecting seat 92 and a second connecting seat 93; the counterweight traction system comprises a first steel wire rope 101 and a second steel wire rope 102, a first guide wheel 103 fixed near the front end of the fixed cantilever 9, a second guide wheel 104 fixed near the rear end of the fixed cantilever 9, a third guide wheel 105 and a fourth guide wheel 106 symmetrically arranged on the fixed cantilever 9, a gap is left between the third guide wheel 105 and the fourth guide wheel 106, and one end of the first steel wire rope 101 and the second steel wire rope 102 is fixed to the rear end of the telescopic cantilever 7; the other end of the first steel wire rope 101 is fixedly connected to the first connecting seat 92 after passing through the third guide wheel 105 and the first guide wheel 103, and the other end of the second steel wire rope 102 is fixedly connected to the second connecting seat 93 after passing through the fourth guide wheel 106 and the second guide wheel 104; in this embodiment, during the extension of the telescopic cantilever 7, the length of the steel wire between the fourth guide wheel 106 and the second guide wheel 104 is increased through the traction force of the first steel wire rope 101 and the second steel wire rope 102, and the length of the steel wire between the third guide wheel 105 and the first guide wheel 103 is shortened through the traction force of the second steel wire rope 102, so that the sliding bracket 91 moves backward on the fixed cantilever 9, the moving counterweight 12 moves backward, and the gondola and the moving counterweight 12 can always maintain stable balance, thereby avoiding the situation that the fixed suspension point is stressed too much and tilts.

[0022] The fixed suspension point is provided with a suspension arm head 2, and the gondola body 1 is installed on the suspension arm head 2; in this embodiment, the telescopic cantilever 7 installs the gondola body 1 through the suspension arm head 2.

[0023] The fixed cantilever 9 is provided with four parking supports 11; in this embodiment, the telescopic cantilever 7 is retracted to the shortest position during shutdown, and the parking supports 11 are parked on the nearest roof, so as to ensure the stability of the gondola during shutdown.

[0024] The front end of the telescopic cantilever 7 is provided with an upwardly inclined top contact limiting rod 3; in the embodiment, the telescopic cantilever 7 is prevented from being excessively extended and colliding with obstacles by the top contact limiting rod 3 during the extension of the telescopic cantilever 7.

[0025] The utility model discloses a kind of manually-driven telescopic approach cranes, including crane, suspension arm head 2, top contact limiting rod 3, drive hand wheel, RV reduction box 5, chain drive mechanism 6, telescopic cantilever 7, transmission chain, fixed cantilever 9, counterweight traction wire rope, parking support 11 and mobile counterweight 12.Crane both sides of hanging point are connected by shaft and installed on suspension arm head 2, suspension arm head 2 front end is designed with material lifting suspension support point, suspension arm head 2 is installed below telescopic cantilever 7 front end by bolt, telescopic cantilever 7 upper front end is installed with top contact limiting, drive hand wheel is installed on RV reduction box 5 input shaft, RV reduction box 5 is installed on telescopic cantilever 7 side, RV reduction box 5 output shaft is connected with chain drive mechanism pinion, transmission chain system one end is fixed in fixed cantilever 9 front end, chain passes through telescopic cantilever 7 and sprocket on chain drive mechanism 6, one end is fixed in fixed cantilever 9 rear end, forms chain transmission loop.Counterweight traction wire rope is designed with 2 roots, one of which one end is fixed in telescopic cantilever 7 tail end, passes through fixed cantilever 9 front end wire rope pulley and is fixed in mobile counterweight front end after another end; another wire rope one end is fixed in telescopic cantilever 7 tail end, passes through fixed cantilever 9 tail end wire rope pulley and is fixed in mobile counterweight rear end after another end.Parking support 11 is fixed in fixed cantilever 9.Working, crane staff manually rotates drive hand wheel, drive hand wheel drives chain drive mechanism sprocket to rotate by RV reduction box 5, and the front end chain fixed point or rear end fixed point on fixed cantilever 9 provides traction, and drive chain drive mechanism 6 drives telescopic cantilever 7 to do extension or contraction action;Telescopic cantilever 7 is driven mobile counterweight to do extension or contraction action by counterweight traction wire rope fixed in telescopic cantilever 7 rear end in the process of extension or contraction, with 1:1 ratio synchronously, ensure that crane keeps steady balance before and after in the process of telescopic approach, prevent that hanging point is too large or appears to incline and overturn.In shutdown, telescopic approach crane is retracted to the shortest position, and parking support 11 four legs are parked on roof, ensure the stability of telescopic approach crane in shutdown.

[0026] Finally, it should be explained that the above specific embodiments are only used to illustrate the technical solutions of the utility model and not to limit, although the utility model is described in detail with reference to examples, those skilled in the art should understand that the technical solutions of the utility model can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the utility model, which should be covered in the scope of claims of the utility model.

Claims

1. A manually driven telescoping proximity crane, characterized by: The crane comprises a fixed cantilever (9) connected to a hoisting device, a telescopic cantilever (7) slidably connected to the rear end of the fixed cantilever (9), an RV speed reducer (5) fixed to the front end of the telescopic cantilever (7), a fixed suspension point arranged at the front end of the telescopic cantilever (7), a crane body (1) mounted at the fixed suspension point, a moving counterweight (12) slidably connected to the fixed cantilever (9), a transmission chain system and a counterweight traction system, an input end of the RV speed reducer (5) is provided with a hand wheel (4), and an output end of the RV speed reducer (5) is provided with a chain drive mechanism (6); in the process of extending the telescopic cantilever (7) through the transmission chain system, the counterweight traction system drives the moving counterweight (12) to move on the fixed cantilever (9), so that the two ends of the telescopic cantilever (7) keep stable balance.

2. A manually driven telescoping proximity crane as claimed in claim 1, characterized in that: The chain drive mechanism (6) comprises a driving shaft connected to an output shaft of the RV speed reducer (5), and a driving sprocket arranged on the driving shaft.

3. A manually driven telescoping proximity crane as claimed in claim 2, characterized in that: The transmission chain system comprises a transmission chain (801), a first transmission sprocket (802) fixed to the fixed cantilever (9), and a second transmission sprocket (803) fixed to the rear end of the telescopic cantilever (7); one end of the transmission chain (801) is fixed to the front end of the fixed cantilever (9), and the other end of the transmission chain (801) is sequentially fixed to the rear end of the fixed cantilever after passing through the first transmission sprocket (802), the second transmission sprocket (803) and the driving sprocket.

4. The manually driven telescoping proximity crane of claim 1, wherein: The fixed cantilever (9) is slidably connected with a sliding frame (91), the moving counterweight (12) is fixed to the rear end of the sliding frame (91), the sliding frame (91) is provided with a first connecting seat (92) and a second connecting seat (93); the counterweight traction system comprises a first steel wire rope (101) and a second steel wire rope (102), a first guide wheel (103) fixed near the front end of the fixed cantilever (9), a second guide wheel (104) fixed near the rear end of the fixed cantilever (9), a third guide wheel (105) and a fourth guide wheel (106) symmetrically arranged on the fixed cantilever (9), a gap is left between the third guide wheel (105) and the fourth guide wheel (106), one end of the first steel wire rope (101) and the second steel wire rope (102) is fixed to the rear end of the telescopic cantilever, the other end of the first steel wire rope (101) is fixed to the first connecting seat (92) after passing through the third guide wheel (105) and the first guide wheel (103), and the other end of the second steel wire rope (102) is fixed to the second connecting seat (93) after passing through the fourth guide wheel (106) and the second guide wheel (104).

5. The manually driven telescoping proximity crane of claim 1, wherein: The fixed suspension point is provided with a suspension arm head (2), and the crane body (1) is mounted on the suspension arm head (2).

6. The manually driven telescoping proximity crane of claim 1, wherein: Four parking supports (11) are arranged on the fixed cantilever (9).

7. The manually driven telescoping proximity crane of claim 1, wherein: The front end of the telescopic cantilever (7) is provided with an upwardly-inclined top-limiting rod (3).