CN205472356U - Flexible arm structure and hoist - Google Patents

Abstract

The utility model discloses a flexible arm structure and hoist relates to engineering machine tool field for the realization is to the stretching position's of the flexible arm of multisection locking. Should flexible arm structure include flexible arm of multisection and locking structure, the flexible arm two sections adjacent flexible arms of multisection can be locked to the locking structure, wherein, be provided with the holding part of intercommunication between two sections adjacent flexible arms, the holding part is used for the oil circuit OR circuit of holding locking structure. The flexible arm structure that above -mentioned technical scheme provided has set up the holding part between adjacent two sections flexible arms to make and to arrange that the locking structure will be in order will stretch out and draw back the arm locking at desired position.

Description

Telescopic boom structure and crane

technical field

The utility model relates to the field of engineering machinery, in particular to a telescopic arm structure and a crane.

Background technique

At present, the telescopic mechanism of the boom of the telescopic boom crane mainly has two forms: the oil cylinder plus the rope row and the single cylinder latch. The pulley layout of the existing double-cylinder plus rope row telescopic mechanism takes up a lot of space, the lap length of the boom is small under the same boundary conditions, and the lifting performance is low under the long boom condition. At the same time, the wire ropes of this telescopic mechanism have a large span and a long length, which may easily cause problems such as telescopic vibration of the boom, slack wire ropes beating the barrel, etc., and the reliability is low. In addition, the telescopic mechanism adopts a synchronous and sequential telescopic method, which cannot realize synchronous telescopic telescopic expansion of the entire boom, and the telescopic efficiency is low.

Boom telescopic mechanism: composed of telescopic oil cylinder, wire rope and pulley, it is the key part of the telescopic boom crane.

Double-cylinder rope row type: a classic form of the boom telescopic mechanism, which consists of a first-stage telescopic cylinder, a second-stage telescopic cylinder, a wire rope, and a pulley. The first-level telescopic cylinder controls the expansion and contraction of the second-section boom, the second-level telescopic cylinder controls the expansion and contraction of the third-section boom, and the wire rope row controls the expansion and contraction of the fourth and fifth-section booms.

The composition of the double-cylinder rope row type telescopic mechanism: as shown in Figure 1, it mainly includes the first telescopic oil cylinder 102, the second telescopic oil cylinder 115, the first fixed pulley 107, the second fixed pulley 104, the third fixed pulley 118, the first fixed pulley Four fixed pulleys 116, the 5th fixed pulley 120, the 6th fixed pulley 108, the 7th fixed pulley 113, the 8th fixed pulley 123, the first stretch out steel wire rope (being rope row steel rope) 121, the second stretch out steel wire rope 117, the 8th fixed pulley Three extension steel wire ropes 119, the fourth extension steel wire ropes 111, the first pull-back steel wire rope 105, the second pull-back steel wire rope 122, the third pull-back steel wire rope 109, the fourth pull-back steel wire rope 124, the basic arm 101, the second section arm 103, Three-section boom 106 , four-section boom 110 , five-section boom 125 , six-section boom 112 and seven-section boom 114 .

The working principle of the double-cylinder rope row type telescopic mechanism: as shown in Figure 1, the telescopic mechanism is composed of double telescopic oil cylinders, steel wire ropes and fixed pulleys, forming two sets of independent telescopic mechanisms. The first telescoping mechanism is controlled by the first telescoping oil cylinder 102 and can only realize the independent telescoping of the two joint arms 103 . The second telescopic mechanism consists of the second telescopic oil cylinder 115, the first fixed pulley 107, the second fixed pulley 104, the third fixed pulley 118, the fourth fixed pulley 116, the fifth fixed pulley 120, the sixth fixed pulley 108, the seventh fixed pulley Fixed pulley 113, the eighth fixed pulley 123, the first stretching steel wire rope 121, the second stretching steel wire rope 117, the third stretching steel wire rope 119, the fourth stretching steel wire rope 111, the first pull back steel wire rope 105, the second pull back steel wire rope 122. The third pullback steel wire rope 109 and the fourth pullback steel wire rope 124 are formed to control and realize. When the second telescopic cylinder stretches, it drives the wire rope pulley block and the recovery wire rope pulley block to realize the synchronous expansion and contraction of the three-section arm 106, the four-section arm 110, the five-section arm 125, the six-section arm 112, and the seven-section arm 114.

The inventors have found that there are at least the following problems in the prior art: the first and second telescopic cylinders are stressed when the boom is hoisted, and the thrust requirements for the telescopic oil cylinders are high. Through the wire rope and the pulley block, the power acting on the second telescopic oil cylinder is the first stretching out the wire rope pulling force, and the first stretching out the wire rope pulling force is 16 times (seven joint arms) of the stress of the last section arm. The force of the first telescopic cylinder is the sum of the force of the second telescopic cylinder, the self-weight of the second telescopic cylinder and the self-weight of the second boom. With the increase of the product tonnage and the number of telescopic booms, the telescopic thrust required by the telescopic oil cylinder will increase accordingly. increase, the bore diameter of the telescopic cylinder increases accordingly, resulting in an increase in the overall volume and weight of the telescopic mechanism, and an increase in the space and weight ratio of the telescopic mechanism relative to the boom, which reduces the effective lifting capacity of the boom , and the cost also increases.

Utility model content

One of the purposes of the present invention is to provide a telescopic boom structure and a crane to optimize the existing telescopic boom structure.

In order to achieve the above object, the utility model provides the following technical solutions:

The utility model provides a telescopic arm structure, which comprises a multi-section telescopic arm and a locking structure, and the locking structure can lock two adjacent telescopic arms of the multi-section telescopic arm;

Wherein, a communicating accommodating part is arranged between two adjacent telescopic arms, and the accommodating part is used for accommodating the oil circuit or the circuit of the locking structure.

In an optional embodiment, the accommodating part includes a drag chain structure, and the drag chain structure includes a drag chain, and one end of the drag chain is connected to the previous telescopic arm of the two adjacent telescopic arms. The cavity of the arm tail of the drag chain is communicated with, and the other end of the drag chain is communicated with the cavity of the arm tail of the latter segment of the telescopic arm in the two adjacent segments.

In an optional embodiment, the locking structure includes a plurality of lock pin mechanisms and a control structure, and the control structure is used to control each of the lock pin mechanisms to move the adjacent two-section telescopic arms of the multi-section telescopic boom Locking, the oil passage or electric circuit of the control structure passes through the accommodating part.

In an optional embodiment, the control structure is an electric control structure, and the electric circuit of the electric control structure passes through the towline structure, the second telescopic arm of the two adjacent telescopic arms in sequence. The cavity at the end of the arm and the cavity of the wall of the last telescopic arm of the two adjacent telescopic arms reach the working position of the locking mechanism; or,

The control structure is a hydraulic control structure, and the oil circuit of the hydraulic control structure passes through the tow chain structure, the cavity of the arm tail of the last telescopic boom among the two adjacent telescopic booms, and the The cavity of the wall body of the latter telescopic arm among the two adjacent telescopic arms reaches the working position of the lock pin mechanism.

In an optional embodiment, two adjacent sections of the telescopic arms respectively have a plurality of pin holes, and the locking of the two adjacent sections of the telescopic arms at multiple locking positions can be realized through the lock pin mechanism.

In an optional embodiment, the structure of the telescopic arm also includes a power source and a transmission mechanism; the power source is drivingly connected to one of the telescopic arms except the basic arm of the multi-section telescopic arm, and the transmission mechanism is connected to the multi-section telescopic arm. Each segment of the telescopic arm is connected; wherein, the transmission mechanism can drive each segment of the telescopic arm to extend or retract synchronously with the one of the telescopic arms relative to the basic arm.

In an optional embodiment, one of the telescopic arms is a two-section arm.

In an optional embodiment, the transmission mechanism includes a first transmission assembly and a second transmission assembly; the first transmission assembly can drive the three-section arm to the last section arm of the multi-section telescopic boom to follow the two-section boom Synchronous extension, the second transmission assembly can drive the three-section arm to the last-section arm of the multi-section telescopic boom to retract synchronously with the two-section arm.

In an optional embodiment, the first transmission assembly includes a plurality of extending chains, one end of each of the extending chains is connected to the previous telescopic arm of one of the telescopic arms except the basic arm of the multi-section telescopic arm fixed, and the other end is fixed to the rear telescopic arm of one of the telescopic arms after going around the fixed pulley fixed on the top of one of the telescopic arms, and the stretching chain is used to realize the stretch out; or,

The first transmission assembly includes a plurality of protruding steel wire ropes, one end of each of the protruding steel wire ropes is fixed to the previous telescopic arm of one of the telescopic arms except the basic arm of the multi-section telescopic arm, and the other end is fixed on the The fixed pulley at the top of the one of the telescopic arms is fixed with the rear telescopic arm of the one of the telescopic arms, and the stretching wire rope is used to realize the stretching of the latter telescopic arm of the one of the telescopic arms.

In an optional embodiment, the second transmission assembly includes a plurality of pullback chains, one end of each pullback chain is connected to the last telescopic arm of one of the telescopic arms except the basic arm of the multi-section telescopic arm fixed, and the other end is fixed to the front telescopic arm of one of the telescopic arms after going around the fixed pulley fixed at the bottom of one of the telescopic arms. retract; or,

The second transmission assembly includes a plurality of pullback wire ropes, one end of each pullback wire rope is fixed to the last telescopic arm of one of the telescopic arms except the basic arm of the multi-section telescopic arm, and the other end is fixed on the The fixed pulley at the bottom of one of the telescopic arms is fixed to the previous telescopic arm of the one of the telescopic arms, and the pull-back wire rope is used to realize the retraction of the latter telescopic arm of the one of the telescopic arms.

The utility model also provides a crane, including the telescopic arm structure provided by any technical solution of the utility model.

Based on the above technical solutions, the embodiments of the present invention can at least produce the following technical effects:

The above technical solution locks the relative position of each section arm at a specific arm length through the locking mechanism, connects each section arm as a whole, and can ignore the restrictions on the lifting capacity of the chain and hydraulic cylinder, and fully utilizes the mechanics of the boom structure. Compared with the double-cylinder rope row telescopic mechanism in the prior art, the lifting performance and safety are improved. In addition, due to the structure of the telescopic arm and the limitation of the space where it is located, in order to solve the problem of difficult installation of the oil passage or pipeline of the locking structure, the above technical solution enables the arrangement of the oil passage or pipeline of the locking structure by setting the accommodating part, and The overall structure of the telescopic arm structure will not be too complicated.

Description of drawings

The drawings described here are used to provide a further understanding of the utility model and constitute a part of the application. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute improper limitations to the utility model. In the attached picture:

Fig. 1 is the schematic diagram of double-cylinder plus rope row type telescopic mechanism in the prior art;

Figure 2a is a schematic front view of the telescopic arm structure provided by Embodiment 1 of the present utility model;

Fig. 2b is a schematic top view of the structure of the telescopic arm structure provided by Embodiment 1 of the present utility model;

Fig. 3a is a schematic front view of the retractable arm structure provided by Embodiment 1 of the present invention in a recovery state;

Fig. 3b is a schematic top view of the retractable arm structure provided by Embodiment 1 of the present invention in a recovery state;

Fig. 4 is a schematic diagram of the oil circuit and the circuit of the locking mechanism of the telescopic arm structure provided by the first embodiment of the utility model;

Fig. 5 is a structural schematic diagram of the telescopic arm structure provided by the second embodiment of the utility model;

Fig. 6 is a structural schematic diagram of the telescopic arm structure provided by the third embodiment of the utility model;

Fig. 7 is a structural schematic diagram of the telescopic arm structure provided by the fourth embodiment of the utility model;

Fig. 8 is a structural schematic diagram of the telescopic arm structure provided by Embodiment 5 of the present invention.

Reference signs:

1. Basic arm; 2. Telescopic oil cylinder; 3. The sixth fixed pulley;

4. The first extension of the wire rope; 5. The first pull back of the wire rope; 6. The seventh fixed pulley;

7. The first fixed pulley; 8. The second pull wire rope; 10. The eighth fixed pulley;

9. The second extended wire rope; 11. The second fixed pulley; 13. The ninth fixed pulley;

12. Pull the steel wire rope for the third time; 14. Extend the steel wire rope for the third time; 15. The third fixed pulley;

16. The fourth pulley wire rope; 17. The tenth fixed pulley; 19. The fourth fixed pulley;

18. The fourth extending steel wire rope; 21. The fifth fixed pulley; 22. The seven-section arm;

20. The fifth extension wire rope; 23. The first drag chain; 25. The second boom;

24. Basic arm locking mechanism; 26. Two-section arm locking mechanism; 27. Three-section arm;

28. Three-section arm locking mechanism; 30. Four-section arm locking mechanism; 29. Four-section arm;

32. Five-section arm locking mechanism; 33. Six-section arm; 31. Five-section arm;

34. Six-section arm locking mechanism; 35. The fifth pull wire rope; 36. The second drag chain;

37. The third drag chain; 38. The fourth drag chain; 39. The fifth drag chain;

41. The sixth drag chain; 311. Drag chain structure; 40. Drum structure;

411, locking structure; 101, basic arm; 103, two-section arm;

102. The first telescopic oil cylinder; 104. The second fixed pulley; 106. The three-section arm;

105, the first pull back wire rope; 107, the first fixed pulley; 108, the sixth fixed pulley;

109. Pulling the wire rope for the third time; 110. Four-section boom; 112. Six-section boom;

111, the fourth extending wire rope; 113, the seventh fixed pulley; 114, the seven-section arm;

115, the second telescopic oil cylinder; 116, the fourth fixed pulley; 118, the third fixed pulley;

117, the second extending steel wire rope; 119, the third extending steel wire rope; 120, the fifth fixed pulley;

121. The first extended wire rope; 123. The eighth fixed pulley; 125. Five-section arm;

122. Pulling the wire rope for the second time; 124. Pulling the wire rope for the fourth time.

detailed description

The technical solution provided by the utility model will be described in more detail below in conjunction with Fig. 2a to Fig. 8 .

Referring to Fig. 2a, Embodiment 1 of the present utility model provides a telescopic arm structure, including a multi-section telescopic arm and a locking structure 411. The locking structure 411 can lock two adjacent telescopic arms of the multi-section telescopic arm. Wherein, a communicating accommodating part is provided between two adjacent telescopic arms, and the accommodating part is used for accommodating an oil circuit or an electric circuit of the locking structure 411 .

The number of telescopic booms included in the multi-section telescopic boom is preferably between 6 and 8 sections. In Embodiment 1 of the present utility model, taking a 7-section telescopic arm as an example, the multi-section telescopic arm includes a basic arm 1, a second-section arm 25, a three-section arm 27... and a seven-section arm 22. The 7-section telescopic arms are sequentially embedded Cover, that is, the two-section arm 25 is enclosed within the basic arm 1, the three-section arm 27 is enclosed within the two-section arm 25 inside, and so on, the seven-section arm 22 is enclosed within the six-section arm 33 inside.

The locking structure 411 can telescopically lock one of the telescopic arms in the extended state and its rear segment. For example, the locking structure 411 can realize the locking between the basic arm 1 and the second-section arm 25, and between the second-section arm 25 and the third-section arm 27. The locking between the three-section arm 27 and the four-section arm 29 ... and the locking between the six-section arm 33 and the seven-section arm 22, etc. One of the telescopic arms and the rear telescopic arm can be locked in multiple positions, which will be described in detail later.

The above technical solution locks the relative position of each section arm at a specific arm length through the locking mechanism, connects each section arm as a whole, and can ignore the restrictions on the lifting capacity of the chain and hydraulic cylinder, and fully utilizes the mechanics of the boom structure. Performance, compared with the double-cylinder rope row telescopic mechanism, it improves the lifting performance and safety. In addition, due to the structure of the telescopic arm and the limitation of the space where it is located, it is also very difficult to arrange the oil passage or pipeline of the locking structure. The above technical solution allows the oil passage or pipeline of the locking structure to be arranged by setting the accommodating parts without The overall structure of the telescopic arm structure is too complicated.

Referring to Fig. 2b, in this embodiment, the accommodating component includes a drag chain structure 311, and the drag chain structure 311 includes a drag chain. One end of the drag chain communicates with the cavity at the arm tail of the preceding telescopic boom among the two adjacent telescopic booms. The other end of the drag chain communicates with the cavity at the end of the rear telescopic boom in the two adjacent telescopic booms. Such as adjacent two-section boom and three-section boom, the two-section boom is used as the front telescopic boom in the two-section telescopic boom, and the three-section boom is used as the latter section telescopic boom in the adjacent two-section telescopic boom. The towline is used for accommodating an oil circuit or an electric circuit for locking the telescopic arm at the rear side and the telescopic arm at the rear side among the two adjacent telescopic arms.

Specifically, referring to Fig. 2b, in this embodiment, the drag chain structure 311 includes 5 drag chains, which are respectively the first drag chain 23, the second drag chain 36, the third drag chain 37, the fourth drag chain 38 and the fourth drag chain Five drag chains 39 . In this embodiment, both ends of each towline communicate with the arm tail cavity.

One end of the first drag chain 23 communicates with the cavity of the basic arm 1 arm tail, and the other end communicates with the arm tail cavity of the two-section arm 25. The first drag chain 23 is used to accommodate and lock the two-section arm 25 and the three-section arm 27. The oil circuit or circuit of the locking structure. It can be seen from Fig. 2a and Fig. 2b that after passing through the first drag chain 23, the pipeline/circuit is transmitted along the arm body of the two-section arm 25 to the two-section arm locking mechanism 26, and the two-section arm locking mechanism 26 Used to lock the two-section boom 25 and the three-section boom 27.

and so on. One end of the fifth drag chain 39 communicates with the arm tail cavity of the five-section arm 31 , and the other end communicates with the arm tail cavity of the six-section arm 33 . One part of the oil circuit/circuit of the six-section arm lock mechanism 34 that is used to lock the six-section arm 33 and the seven-section arm 22 is just arranged in the fifth drag chain 39.

It should be noted that, for the basic arm lock pin mechanism 24 that locks the basic arm 1 and the two-section arm 25, it is not necessary to provide a separate drag chain for it, and its oil circuit/circuit can be directly transferred to the The arm pin of the basic arm detent mechanism 24.

The multiple drag chains included in the drag chain structure 311 can be arranged side by side and staggered, as shown in Figures 2b and 3b, which further reduces the volume and weight of the telescopic mechanism while ensuring the transportation and synchronous telescopic functions.

Here, the locking structure 411 includes a plurality of locking mechanisms and a control structure. The control structure is used to control each locking mechanism to lock two adjacent telescopic arms in the multi-section telescopic boom. The oil circuit or circuit of the control structure passes through the capacity. set parts.

In this embodiment, there are six locking mechanisms, namely: basic arm locking mechanism 24, two-section arm locking mechanism 26, three-section arm locking mechanism 28, four-section arm locking mechanism 30, and five-section arm locking mechanism. Mechanism 32, six-joint arm locking mechanism 34. The basic arm locking mechanism 24 controls the relative position locking of the basic arm 1 and the second-section arm 25 . The two-section boom locking mechanism 26 controls the relative position locking of the two-section boom 25 and the three-section boom 27 . The three-section arm locking mechanism 28 controls the relative position locking of the three-section arm 27 and the four-section arm 29 . The four-section arm locking mechanism 30 controls the relative position locking of the four-section arm 29 and the five-section arm 31 . The five-section arm locking mechanism 32 controls the relative position locking of the five-section arm 31 and the six-section arm 33 . The six-section arm locking mechanism 34 controls the relative position locking of the six-section arm 33 and the seven-section arm 22 .

With the telescopic arm structure provided by the above technical solution, the hydraulic oil cylinder and the chain pulley block are not stressed during the lifting operation, and the structural arrangement with small size and light weight can be realized. The chain pulley block is only used when the telescopic arm is telescopic. When the telescopic arm is stretched to a specific arm length to lift the load, the limit locking mechanism will lock the position of each section arm, and each section arm forms a whole, and the chain is not stressed. The strength of the chain pulley block only needs to meet the telescopic thrust requirements. Compared with the double-cylinder rope-row telescopic mechanism, the volume and weight of the rope row can be reduced, the effective lifting capacity of the boom can be increased, and the cost can also be reduced.

Optionally, the control structure is an electric control structure, and the circuit of the electric control structure passes through the drag chain structure 311, the cavity of the arm tail of the latter telescopic arm in the two adjacent telescopic arms, and the adjacent two telescopic arms. In the telescopic arm, the cavity of the wall body of the last section of the telescopic arm reaches the working position of the lock pin mechanism. Taking the control structure of the two-section arm lock mechanism 26 as an example of an electric control structure, the two-section arm lock mechanism 26 is used to lock the two-section arm 25 and the three-section arm 27. The circuit passes through the first drag chain 23 , the cavity at the end of the arm of the second arm 25 , the cavity of the arm body of the second arm 25 , and arrives at the arm pin of the locking mechanism 26 of the second arm.

Or, the control structure is a hydraulic control structure, and the oil circuit of the hydraulic control structure passes through the drag chain structure 311, the cavity of the arm tail of the latter telescopic boom in the adjacent two telescopic booms, and the adjacent two telescopic booms. The cavity of the wall body of the last telescoping arm in the arm reaches the working position of the locking pin mechanism.

The telescopic boom structure provided by the above-mentioned technical solution has a small volume ratio occupying the inner space of the boom, increases the overlap ratio, reduces the sudden change of the section of each section of the boom, and improves the rigidity and stability of the boom. sex.

It has been introduced above that one of the telescopic arms and the rear telescopic arm can be locked in multiple positions, and the implementation method is described in detail here.

Referring to Fig. 3a, the two adjacent telescopic arms respectively have a plurality of pin holes, and the locking of the two adjacent telescopic arms at multiple locking positions can be realized through the locking pin mechanism.

Referring to Fig. 4, the basic arm 1 has a pin hole, and the two-section arm 25 has a plurality of pin holes, and the locking mechanism can lock the two-section arm 25 through the pin hole on the basic arm 1 and one of these multiple pin holes. locking. Other telescopic arms can also realize multi-position locking in the same way. The telescopic arm structure provided by the above technical solution has compact structure, low cost and high reliability.

Referring to Fig. 3a, the structure of the telescopic arm also includes a power source and a transmission mechanism; the power source is driven and connected to one of the telescopic arms except the basic arm 1 of the multi-section telescopic arm, and the transmission mechanism is connected to each telescopic arm of the multi-section telescopic arm; wherein, The transmission mechanism can drive each segment of the telescopic arms to extend or retract synchronously with one of the telescopic arms relative to the basic arm 1 .

In the above technical solution, the synchronous expansion and contraction of each section arm is realized through the power source, the transmission mechanism (the wire rope pulley block can be used) and the locking structure 411, which improves the expansion and contraction efficiency. The wire rope pulley block is only used when the telescopic arm is stretched. When the telescopic arm is stretched to a specific arm length to lift the load, the limit locking mechanism will lock the position of each section arm, and each section arm forms a whole, and the hydraulic cylinder and the wire rope are not stressed. The strength of the wire rope pulley block only needs to meet the telescopic thrust requirements. Compared with the double-cylinder rope row telescopic mechanism, the rope row volume and weight can be reduced, the effective lifting capacity of the boom is improved, and the cost is also reduced. The telescopic oil cylinder 2 only uses when the telescopic arm is telescopic, and when telescopic to specific arm length hoisting, the limit locking mechanism locks the position of each joint arm, and the telescopic oil cylinder 2 is not stressed. The thrust of the oil cylinder only needs to meet the requirements of the telescopic thrust. Compared with the double-cylinder rope-row telescopic mechanism, the bore diameter of the oil cylinder can be relatively small, which reduces the overall weight of the telescopic mechanism and increases the effective lifting capacity of the boom. The cost also increases accordingly. reduce.

Here, one of the telescopic arms can be selected as the two-section arm 25 .

For the convenience of setting the transmission structure, preferably, the power source drives the two-section arm 25 to extend or retract. The power source is driven and connected with the two-section boom 25, and the transmission mechanism is set to be connected with every joint telescopic boom of the multi-section telescopic boom. In this way, the transmission mechanism can drive the three-section arm 27 to the last section arm of the multi-section telescopic boom to extend or retract synchronously with the two-section arm 25 .

It can be seen that in the above technical solution, the basic arm 1 of the multi-section telescopic boom is fixedly set, and the power source only drives one of the multi-section telescopic booms except the basic boom 1 to extend or retract, and the other telescopic booms can be driven by the transmission mechanism , so as to realize the synchronous action with one of the telescopic arms. For the convenience of arranging the transmission structure, the power source preferably drives the two-section arm 25 to extend or retract. It can be seen that, in the above-mentioned technical solution, in the process of extending or retracting the telescopic arm, as long as the second-section arm 25 is driven to move, the synchronous extension and retraction of the third-section arm 27 to the last-section arm can be realized, which shows that it has high telescopic efficiency and good performance.

The implementation of the transmission mechanism is introduced below.

The transmission mechanism includes a first transmission assembly and a second transmission assembly; the first transmission assembly can drive the three-section arm 27 to the last section arm of the multi-section telescopic arm to extend synchronously with the second-section arm 25, and the second transmission assembly can drive the multi-section telescopic arm The three-section boom 27 to the last section boom are retracted synchronously with the two-section boom 25.

The transmission mechanism adopts the first transmission assembly and the second transmission assembly to realize the action transmission of the second-section arm 25 to the seventh-section arm 22 in the extension operation, and the action transmission of the second-section arm 25 to the seventh-section arm 22 in the retraction operation. , so that the transmission of the transmission mechanism can be made reliable and the structure is simple.

Further, the first transmission assembly includes a plurality of protruding chains, one end of each protruding chain is fixed to the previous telescopic arm of one of the telescopic arms except the basic arm 1 of the multi-section telescopic arm, and the other end is fixed around the warp The fixed pulley on the top of a telescopic arm is fixed with the rear telescopic arm of the one of the telescopic arms, and the stretch chain is used to realize the stretching of the latter telescopic arm of the one of the telescopic arms.

Here, the function of the first transmission component can also be realized by using the steel wire rope. Specifically, the first transmission assembly adopts the following implementation method: the first transmission assembly includes a plurality of protruding steel wire ropes, and one end of each protruding steel wire rope is connected to the previous telescopic arm of one of the telescopic arms of the multi-section telescopic arm except the basic arm 1. fixed, the other end is fixed to the rear telescopic arm of one of the telescopic arms by going around the fixed pulley fixed on the top of one of the telescopic arms, and the wire rope is extended to realize the extension of the latter telescopic arm of one of the telescopic arms .

In this embodiment, the second transmission assembly includes a plurality of pull-back chains, one end of each pull-back chain is fixed to the rear telescopic arm of one of the multi-section telescopic arms except the basic arm 1, and the other end is fixed on the The fixed pulley at the bottom of the one of the telescopic arms is fixed with the previous telescopic arm of the one of the telescopic arms, and the pull chain is used to realize the retraction of the latter telescopic arm of the one of the telescopic arms.

Here, the function of the second transmission assembly can also be realized by using the steel wire rope: the second transmission assembly includes a plurality of pull-back steel wire ropes, and one end of each pull-back steel wire rope is connected to the rear end of one of the telescopic arms of the multi-section telescopic arm except the basic arm 1. The telescopic arm is fixed, and the other end is fixed to the previous telescopic arm of one of the telescopic arms by going around the fixed pulley fixed at the bottom of one of the telescopic arms. retract.

A specific embodiment is given below.

The telescopic arm structure provided in this embodiment mainly adopts telescopic cylinder, drag chain structure 311 conveying device, wire rope pulley block, and lock pin to realize synchronous telescopic expansion of the multi-section arm.

1. Composition of the telescopic arm structure (take the 7-section arm as an example): as shown in Figure 3a, it includes the telescopic oil cylinder 2, the first fixed pulley 7, the second fixed pulley 11, the third fixed pulley 15, the fourth fixed pulley Pulley 19, fifth fixed pulley 21, sixth fixed pulley 3, seventh fixed pulley 6, eighth fixed pulley 10, ninth fixed pulley 13, tenth fixed pulley 17, first extension wire rope 4, second extension Wire rope 9, third wire rope 14, fourth wire rope 18, fifth wire rope 20, first wire rope 5, second wire rope 8, third wire rope 12, fourth wire rope 16. The fifth pull-back wire rope 35, the basic arm 1, the second-section arm 25, the third-section arm 27, the fourth-section arm 29, the fifth-section arm 31, the sixth-section arm 33, the seven-section arm 22, the basic arm locking mechanism 24, the second-section arm Sectional arm locking mechanism 26, three-section arm locking mechanism 28, four-section arm locking mechanism 30, five-section arm locking mechanism 32, six-section arm locking mechanism 34, first drag chain 23, second drag chain 36, The third drag chain 37 , the fourth drag chain 38 and the fifth drag chain 39 .

2. The working principle of the telescopic arm structure: as shown in accompanying drawing 3, this telescopic mechanism is made up of telescopic oil cylinder 2 plus steel wire rope with fixed pulley and lock pin mechanism, including a set of oil cylinder wire rope telescopic mechanism and a set of limit locking mechanism. The oil cylinder wire rope telescopic mechanism consists of a telescopic oil cylinder 2, a first fixed pulley 7, a second fixed pulley 11, a third fixed pulley 15, a fourth fixed pulley 19, a fifth fixed pulley 21, a sixth fixed pulley 3, and a seventh fixed pulley 6 , the eighth fixed pulley 10, the ninth fixed pulley 13, the tenth fixed pulley 17, the first extended steel rope 4, the second extended steel rope 9, the third extended steel rope 14, the fourth extended steel rope 18, the fifth extended The steel wire rope 20, the first pull-back wire rope 5, the second pull-back steel wire rope 8, the third pull-back steel wire rope 12, the fourth pull-back steel wire rope 16 and the fifth pull-back steel wire rope 35 are combined for control and realization. It can realize two-section boom 25, three-section boom 27, four-section boom 29, five-section boom 31, six-section boom 33, and seven-section boom 22 synchronous expansion and contraction.

The locking mechanism is composed of a basic arm locking mechanism 24, a two-section arm locking mechanism 26, a three-section arm locking mechanism 28, a four-section arm locking mechanism 30, a five-section arm locking mechanism 32, and a six-section arm locking mechanism 34. , can lock the relative position of each section arm structure under different arm length combinations.

3. The lock pin control oil circuit and circuit of the telescopic arm structure:

The single-cylinder towline structure 311 independently locked telescopic mechanism lock pin control oil circuit and circuit are arranged inside the towline structure 311, and expand and contract synchronously with each section arm. When the telescopic arm stretches to the specified position, the position sensor on each arm sends a signal to control the locking mechanism to pin each segment of the telescopic arm. The structure of each segment of the telescopic arm is connected as a whole. When lifting, only each segment The arm structure and the locking pin are stressed. As shown in Figure 5:

The telescopic oil cylinder 2 is fixed on the arm tail of the basic arm 1 and can directly supply oil;

The basic arm locking mechanism 24 controls the oil circuit: the tail of the basic arm 1 → the inner wall of the basic arm 1 cylinder → the basic arm locking mechanism 24 .

Two-section arm locking mechanism 26 controls the oil circuit: the tail of basic arm 1 → the first drag chain 23 → the second-section arm 25 tail → the inner wall of the second-section arm 25 cylinder → the second-section arm locking mechanism 26 .

The three-section arm lock pin mechanism 28 controls the oil circuit: the tail of the basic arm 1 → the first drag chain 23 → the second drag chain 36 → the tail of the three-section arm 27 → the inner wall of the three-section arm 27 → the three-section arm lock mechanism 28.

The four-section arm lock pin mechanism 30 controls the oil circuit: the tail of the basic arm 1 → the first drag chain 23 → the tail of the second-section arm 25 → the second drag chain 36 → the tail of the third-section arm 27 → the third drag chain 37 → the fourth-section arm 29 arm Tail→four-joint arm 29 cylindrical body→four-joint arm locking mechanism 30.

The five-section arm lock pin mechanism 32 controls the oil circuit: the tail of the basic arm 1 → the first drag chain 23 → the tail of the second-section arm 25 → the second drag chain 36 → the tail of the third-section arm 27 → the third drag chain 37 → the fourth-section arm 29 Tail→fourth drag chain 38→five-section arm 31 afterbody→five-section arm 31 cylindrical body→five-section arm locking mechanism 32.

Six-section arm locking mechanism 34 controls the oil circuit: the tail of the basic arm 1 → the first drag chain 23 → the tail of the second-section arm 25 → the second drag chain 36 → the tail of the third-section arm 27 → the third drag chain 37 → the fourth-section arm 29 Tail→fourth drag chain 38→five-section arm 31 tail part→fifth drag chain 39→six-section arm 33 arm tail→six-section arm 33 barrel→six-section arm locking mechanism 34.

Embodiment two

Referring to Fig. 5, Embodiment 2 of the present utility model provides a telescopic arm structure, which has the following differences from the technical solutions of the above-mentioned embodiments: in this embodiment, the multi-section telescopic Chain structure311. The working principle and function of the towline structure 311 can be referred to above, and will not be repeated here.

Embodiment three

Referring to Fig. 6, Embodiment 3 of the present utility model provides a telescopic arm structure, which has the following differences from the technical solutions of the above-mentioned embodiments: in this embodiment, the multi-section telescopic The chain structures 311 are respectively the second drag chain 36 to the sixth drag chain 41 . In addition, in this embodiment, the power source includes an extension power source and a retraction power source. The extending power source adopts a hydraulic oil cylinder structure, which only realizes the extending of the telescopic arm; the retracting power source adopts a reel structure 40, which only realizes the retracting of the telescopic arm.

The working principle and function of the towline structure 311 can be referred to above, and will not be repeated here.

Embodiment Four

Referring to Fig. 7, Embodiment 4 of the present utility model provides a telescopic arm structure, which has the following differences from the technical solutions of the above-mentioned embodiments: in this embodiment, the multi-section telescopic Chain structure311. In addition, in this embodiment, the power source includes an extension power source and a retraction power source. The extending power source adopts a hydraulic oil cylinder structure, which only realizes the extending of the telescopic arm; the retracting power source adopts a reel structure 40, which only realizes the retracting of the telescopic arm.

In addition, in this embodiment, only three drag chain structures 311 are provided, which are respectively located between the second-section arm 25 and the third-section arm 27, between the fourth-section arm 29 and the fifth-section arm 31, between the sixth-section arm 33 and the seven-section arm 22, respectively the second drag chain 36, the fourth drag chain 38 and the sixth drag chain 41.

The retraction power source adopts the reel structure 40, and there are three. Seen from top to bottom in FIG. The cavity at the end of the two-section arm 25 communicates with the reel structure 40 located at the top, the arm end of the four-section arm 29 communicates with the reel structure 40 located in the middle, and the arm end of the six-section arm 33 communicates with the reel structure 40 located at the bottom. The communication of the reel structure 40.

The working principles and functions of each drag chain structure 311 can be referred to above, and will not be repeated here.

Embodiment five

Referring to Fig. 8, Embodiment 5 of the present utility model provides a telescopic arm structure, which has the following differences from the technical solutions of the above-mentioned embodiments: in this embodiment, the multi-section telescopic Yang structure. The accommodating part is the outer protective cover of the steel wire rope on the shared hoisting structure, which means that the accommodating part and the steel wire rope on the hoisting structure share a protective cover. In addition, in this embodiment, the power source also includes an extension power source and a retraction power source. The extending power source adopts a hydraulic oil cylinder structure, which only realizes the extending of the telescopic arm; the retracting power source adopts a reel structure 40, which only realizes the retracting of the telescopic arm.

The retraction power source adopts the reel structure 40, and there are three reel structures 40, and the six reel structures 40 respectively realize the retraction of the two-section arm 25 to the seven-section arm 22 as viewed from top to bottom in FIG. 7 .

Another embodiment of the utility model also provides a crane, including the telescopic arm structure provided by any technical solution of the utility model.

In describing the present invention, it should be understood that the terms "central", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal" , "Top", "Bottom", "Inner", "Outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, rather than indicating Or implying that the device or element referred to must have a specific orientation, be constructed and operated for a specific orientation, and thus cannot be construed as limiting the protection content of the present utility model.

If words such as "first" and "second" are used herein to define components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of describing the utility model and simplifying Description, unless otherwise stated, the above words have no special meaning.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or to perform equivalent replacements for some of the technical features, but these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit of the technical solutions of the various embodiments of the present invention and range.

Claims (12)

1. A telescopic boom structure is characterized by comprising a plurality of sections of telescopic booms and a locking structure (411), wherein the locking structure (411) can lock two adjacent sections of telescopic booms of the plurality of sections of telescopic booms;

and a communicated accommodating part is arranged between two adjacent sections of telescopic arms, and the accommodating part is used for accommodating an oil circuit or a circuit of the locking structure (411).

2. A telescopic arm structure according to claim 1, wherein the housing part comprises a drag chain structure (311), the drag chain structure (311) comprising a drag chain;

one end of the drag chain is communicated with a cavity of the arm tail of the front section of the two adjacent sections of telescopic arms, and the other end of the drag chain is communicated with a cavity of the arm tail of the rear section of the two adjacent sections of telescopic arms.

3. A telescopic arm structure according to claim 1, characterized in that said locking structure (411) comprises a plurality of latch mechanisms and a control structure for controlling each latch mechanism to lock two adjacent telescopic arms of said plurality of telescopic arms, said control structure having an oil or electric circuit passing through said housing.

4. A telescopic arm structure according to claim 2, wherein said locking structure (411) comprises a plurality of latch mechanisms and a control structure for controlling each latch mechanism to lock two adjacent telescopic arms of said plurality of telescopic arms, said control structure having an oil or electric circuit passing through said housing.

5. The telescopic arm structure according to claim 4, wherein the control structure is an electric control structure, and a circuit of the electric control structure sequentially passes through the drag chain structure (311), a cavity of an arm tail of a rear telescopic arm of the two adjacent telescopic arms, and a cavity of a wall body of the rear telescopic arm of the two adjacent telescopic arms to reach an operating position of the lock pin mechanism; or,

the control structure is a hydraulic control structure, and an oil way of the hydraulic control structure sequentially penetrates through the drag chain structure (311), a cavity of the tail of the rear telescopic arm in the two adjacent telescopic arms and a cavity of the wall body of the rear telescopic arm in the two adjacent telescopic arms to reach the working position of the lock pin mechanism.

6. The telescopic arm structure of claim 4, wherein each of the two adjacent telescopic arms has a plurality of pin holes, and the locking of the two adjacent telescopic arms at a plurality of locking positions is achieved by the locking pin mechanism.

7. A telescopic arm structure according to claim 1 or 2, further comprising a power source and a transmission mechanism; the power source is in driving connection with one telescopic arm except the basic arm (1) of the multiple telescopic arms, and the transmission mechanism is connected with each telescopic arm of the multiple telescopic arms; wherein, the transmission mechanism can drive each section of telescopic arm to synchronously extend or retract along with one telescopic arm relative to the basic arm (1).

8. A telescopic arm structure according to claim 7, characterized in that said one of the telescopic arms is a two-jointed arm (25).

9. The telescopic arm structure according to claim 8, wherein the transmission mechanism comprises a first transmission assembly and a second transmission assembly; the first transmission assembly can drive the three-section arm (27) to the last section arm of the multi-section telescopic arm to synchronously extend along with the two-section arm (25), and the second transmission assembly can drive the three-section arm (27) to the last section arm of the multi-section telescopic arm to synchronously retract along with the two-section arm (25).

10. The telescopic arm structure according to claim 9, wherein said first transmission assembly comprises a plurality of extension chains, each of said extension chains having one end fixed to a previous telescopic arm of one of said plurality of telescopic arms except for said base arm (1) and the other end fixed to a subsequent telescopic arm of said one telescopic arm after passing through a fixed pulley fixed to a top of said one telescopic arm, said extension chains being adapted to extend said subsequent telescopic arm of said one telescopic arm; or,

the first transmission assembly comprises a plurality of extension steel wire ropes, one end of each extension steel wire rope is fixed with a front telescopic arm of one telescopic arm except the basic arm (1) of the plurality of sections of telescopic arms, the other end of each extension steel wire rope is fixed with a rear telescopic arm of the one telescopic arm after passing through a fixed pulley fixed at the top of the one telescopic arm, and the extension steel wire ropes are used for extending the rear telescopic arm of the one telescopic arm.

11. The telescopic arm structure according to claim 9, wherein the second transmission assembly comprises a plurality of pull-back chains, one end of each pull-back chain is fixed with a rear telescopic arm of one telescopic arm except the basic arm (1), and the other end of each pull-back chain is fixed with a front telescopic arm of the one telescopic arm after passing through a fixed pulley fixed at the bottom of the one telescopic arm; or,

the second transmission assembly comprises a plurality of pull-back steel wire ropes, one end of each pull-back steel wire rope is fixed with the rear telescopic arm of one telescopic arm except the basic arm (1), the other end of each pull-back steel wire rope is fixed with the front telescopic arm of the one telescopic arm after passing through a fixed pulley fixed at the bottom of the one telescopic arm, and the pull-back steel wire ropes are used for realizing retraction of the rear telescopic arm of the one telescopic arm.

12. A crane comprising a telescopic arm construction according to any one of claims 1 to 11.