CN218507433U

CN218507433U - Crawler crane

Info

Publication number: CN218507433U
Application number: CN202222349955.0U
Authority: CN
Inventors: 姜锡祥; 邢文清; 张姗
Original assignee: Construction Machinery Branch of XCMG
Current assignee: Construction Machinery Branch of XCMG
Priority date: 2022-09-05
Filing date: 2022-09-05
Publication date: 2023-02-21
Anticipated expiration: 2032-09-05

Abstract

The utility model discloses a crawler crane in hoisting engineering machinery technical field aims at solving among the prior art and promotes the repacking that becomes the amplitude of cloth ability required with high costs, the poor scheduling problem of economic benefits. The variable-amplitude device is mounted on the rotary table and comprises a first pulley and a second pulley which is fixed relative to the first pulley, the mast is rotatably arranged at one end of the rotary table, the first pulley is hinged to the other end of the rotary table, and the rotary table is provided with an elevating device for elevating the second pulley. The utility model is used for promote the arm of force that becomes width of cloth wire rope under the condition that does not change speed reducer, revolving stage and mast length, can promote the biggest width of cloth moment of moment under the unchangeable condition of width of cloth wire rope bearing capacity, device repacking low cost convenient operation has good economic benefits.

Description

Crawler crane

Technical Field

The utility model relates to a crawler crane belongs to hoisting engineering machinery technical field.

Background

With the iteration of the market, especially under the big situation of the national 'double carbon' strategy, wind power is vigorously developed, and the requirements on the crawler crane are that the hoisting performance is higher and higher, and the main arm is longer and longer. In order to meet this demand, and support the development of the wind power industry, higher requirements are put on the amplitude variation device capacity of the crawler crane.

The method for improving the amplitude variation capability of the amplitude variation winch at present is characterized in that firstly, the torque of the amplitude variation winch is improved by improving the tension of the amplitude variation winch, which can be generally realized by changing the transmission ratio of a speed reducer, but correspondingly, higher requirements are provided for the bearing capacity of a mast and an amplitude variation steel wire rope, so that the amplitude variation capability of the amplitude variation winch is limited under the condition of limited bearing capacity; secondly, the amplitude-variable force arm can be increased by increasing the length of the mast and the length of the rotary table so as to improve the maximum amplitude-variable moment of the amplitude-variable steel wire rope under the limited bearing capacity, the two methods have certain operation limitation, both can greatly improve the refitting cost, and have no good economic benefit.

Disclosure of Invention

An object of the utility model is to overcome not enough among the prior art, provide a crawler crane for promote under the condition that does not change speed reducer, revolving stage and mast length and become the arm of force of width of cloth wire rope, can promote the biggest moment of width of cloth under the unchangeable condition of the wire rope bearing capacity that becomes width of cloth, device repacking low cost convenient operation has good economic benefits.

In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:

the utility model provides a pair of crawler crane, include the revolving stage, become the width of cloth device, become width of cloth assembly pulley, mast and main arm, it installs on the revolving stage to become the width of cloth device, become width of cloth assembly pulley include first pulley and with first pulley position relatively fixed's second pulley, the mast rotates and sets up in revolving stage one end, the articulated other end that sets up at the revolving stage of first pulley, be provided with the device of elevating that is used for elevating the second pulley on the revolving stage, become the wire rope of drawing forth on the width of cloth device in proper order via the mast top, become width of cloth assembly pulley, mast top, mast Ding Duan is connected with the arm-lifting end of main arm with the arm-pulling plate.

Specifically, the elevating device comprises an oil cylinder and a limiting block arranged at the output shaft end of the oil cylinder, the oil cylinder is installed on the rotary table, a sliding groove is formed in the limiting block, and the main shaft of the second pulley slides and is limited in the sliding groove.

Specifically, the elevating device comprises a steel plate frame fixedly mounted on the rotary table, and the second pulley is rotatably arranged on the steel plate frame.

Specifically, the elevating device is a guy cable, one end of the guy cable is connected to one end of the amplitude variation pulley block close to the second pulley, and the other end of the guy cable is fixed at other positions on the non-amplitude variation pulley block.

Specifically, pull rings are fixedly mounted at the ends, close to the second pulley, of the rotary table and the amplitude variation pulley block, and the two ends of the stay cable are fixedly connected through the pull rings.

Specifically, a winding mechanism is arranged on the rotary table, a pull ring is fixedly mounted at one end, close to the second pulley, of the amplitude pulley block, one end of the pull rope is wound on the winding mechanism, and the other end of the pull rope is connected to the pull ring.

Specifically, a connecting line of the first pulley and the second pulley is perpendicular to a connecting line of the second pulley and the top end of the mast.

Compared with the prior art, the utility model discloses the beneficial effect who reaches:

1. the variable-amplitude pulley block is hinged to the rotary table at one end, and the other end of the variable-amplitude pulley block is elevated by the elevating device, so that the top end of the variable-amplitude pulley block which is straightened by the variable-amplitude steel wire rope can move upwards, the force arm is increased, and when the bearing capacity of the steel wire rope is unchanged, the maximum variable-amplitude torque can be effectively improved as the variable-amplitude torque is the product of the variable-amplitude force and the force arm;

2. the utility model discloses a to set up the device of will elevating into the cable, make the second pulley part can be pulled up by the cable effect, compare in its and repacking mode, only a set of cable just can realize becoming the promotion of width of cloth moment, can greatly practice thrift repacking cost and effective hoisting device's economic benefits.

Drawings

Fig. 1 is a schematic view of a matching structure of a variable amplitude winch of a crawler crane in the prior art;

fig. 2 is a schematic structural diagram of a luffing device of a crawler crane according to an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of the crawler crane according to the embodiment of FIG. 2 of the present invention;

FIG. 4 is a comparison graph of the force arm length in the prior art and the technical solution of the present invention;

reference numerals: 1. a turntable; 2. a variable amplitude device; 3. an amplitude-variable pulley block; 4. a mast; 5. a wire rope; 6. a cable; 7. a main arm; 8. and (5) pulling the plate.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

Example (b):

the crawler crane provided by the embodiment of the utility model is used for lifting the force arm of the amplitude-variable steel wire rope under the condition of not changing the lengths of the speed reducer, the rotary table and the mast, the maximum amplitude-variable torque can be lifted under the condition of inconvenient bearing capacity of the amplitude-variable steel wire rope, the device is low in modification cost and convenient to operate, and has good economic benefits, in order to realize the functions of the crane, the crane device is arranged to comprise the rotary table 1, the amplitude-variable device 2, the amplitude-variable pulley block 3, the mast 4 and the main arm 7, the amplitude-variable device 2 is arranged on the rotary table 1 according to the existing connection relation, the main arm 7 is hinged on the rotary table 1, the amplitude-variable pulley block 3 comprises a first pulley and a second pulley which is relatively fixed with the first pulley, the first pulley and the second pulley can be fixed by corresponding connecting plates or connecting rods (refer to figure 2, when the distance between the first pulley and the second pulley is larger, the length of the liftable force arm is longer), and considering the length of the sufficient liftable force arm, the mast 4 is rotatably arranged at one end of the rotary table 1, the first pulley is hinged at the other end of the rotary table 1, the larger the distance between the hinge point of the mast 4 and the first pulley is, the longer the connection line between the second pulley and the top end of the mast 4 is, the longer the length of the formed triangular bevel edge is, the larger the force arm is, as shown in fig. 4, the arrangement mode approaching the maximum force arm is adopted, and meanwhile, the steel wire rope 5 led out from the amplitude variation device 2 sequentially passes through the top end of the mast 4, the amplitude variation pulley block 3 and the top end of the mast 4, and the top end of the mast 4 is connected with the starting arm end of the main arm 7 through the pulling plate 8 by arranging the amplitude variation device on the rotary table 1 for elevating the second pulley. At this time, the actual moment arm of the device can be compared with the moment arm in the prior art as shown in fig. 4, wherein the line a is the moment arm in the prior art, and the line b is the actual moment arm after the device is improved, so that the increase of the actual moment arm of the device after the improvement can be obviously seen, and compared with the change of the length of the speed reducer, the length of the mast 4 or the length of the rotary table 1, the device has high operability, low use cost and good economic benefit.

The embodiment of the utility model provides a pair of crawler crane, specifically provide a structure of overhead device and application method thereof, it is concrete, it includes the hydro-cylinder and sets up the stopper at hydro-cylinder output shaft end to set up overhead device here, install the hydro-cylinder on revolving stage 1, the spout has been seted up on the stopper, and slide the inside of spacing setting at the spout with the main shaft of second pulley, the hydro-cylinder is when the drive stopper goes up and down, the main shaft of second pulley rises in step by the spacing effect, and realize the overhead length that changes the actual arm of force of second pulley with this, the reach out of hydro-cylinder is adjustable, be favorable to directly adjusting the arm of force for the maximum value under the current mechanism set state, position setting about stopper spout and hydro-cylinder, can realize relevant demand can, specific details do not do too much explanation here.

The embodiment of the utility model provides a pair of crawler crane specifically provides an elevating device and is used for providing the fixed point of elevating for the second pulley, and is concrete, sets up the elevating device here and includes the steel plate frame of fixed mounting on revolving stage 1, through rotating the second pulley and set up the location of realization to the second pulley on the steel plate frame, this kind of mode is compared in oil cylinder drive, does not have good adjustable performance, nevertheless can effectively reduce the repacking cost for the setting of hydro-cylinder.

The embodiment of the utility model provides a pair of crawler crane, specifically provide an elevating device is used for providing the fixed point of elevating for the second pulley, it is specific, establish the elevating device here into cable 6, connect the one end that becomes width of cloth assembly pulley 3 and be close to the second pulley with 6 one end of cable, the other end is fixed in other positions on the non-width of cloth assembly pulley 3 (other positions can be that revolving stage 1 also can be other mechanisms, can ensure that the one end of cable 6 is stable fixed can), the hoist is when carrying out the jack-up operation, wire rope 5 draws the second pulley and establishes, this moment through cable 6 to the spacing realization of the other end to the elevating of second pulley, as shown in figure 2 or figure 3, it should be noted, cable 6 should not the overlength in order to lose its normal effect of elevating, the technical scheme that adopts cable 6 compares in other elevating devices, only need set up fixed point and a set of cable 6 and just can realize on original device, can greatly reduce the cost, can satisfy the user demand under the high width of height ability when having good economic benefits.

The embodiment of the utility model provides a pair of crawler crane, for the convenience connect fixedly with cable 6, here at revolving stage 1 and become the equal fixed mounting of one end that width of cloth assembly pulley 3 is close to the second pulley have the pull ring (can refer to fig. 3 and show, the one end purpose that is located and is close to two pulleys is the change action point, and the increase of the arm of force can make the required pulling force of cable 6 lower), this moment with cable 6 both ends through the pull ring connect fixedly can.

The embodiment of the utility model provides a pair of crawler crane, for the convenience adjust the most suitable position angle of change width of cloth assembly pulley 3 according to actual site conditions, be provided with winding mechanism here on revolving stage 1, there is the pull ring at the one end fixed mounting that becomes width of cloth assembly pulley 3 and be close to the second pulley, convolute the one end of cable 6 on winding mechanism, and connect the other end of cable 6 on the pull ring, when the width of cloth moment is become in needs adjustment, it can directly receive the stay cable 6 weak point or lengthen through winding mechanism, be favorable to adjusting at any time according to the on-the-spot assembly demand.

The embodiment of the utility model provides a pair of crawler crane specifically provides a structure assembly position when becoming width of cloth arm of force is the biggest, it is the biggest if needs satisfy the width of cloth arm of force, wire rope 5 should be the biggest apart from the distance of 4 bottoms of mast, the line perpendicular to second pulley that sets up first pulley and second pulley this moment can guarantee this distance the biggest with the line on 4 tops of mast, the arm of force that can provide is also the longest, under this state, can the biggest promotion hoist become width of cloth moment and be favorable to the use in the actual engineering.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.

Claims

1. A crawler crane, characterized in that: the device comprises a rotary table (1), an amplitude variation device (2), an amplitude variation pulley block (3), a mast (4) and a main arm (7), wherein the amplitude variation device (2) is installed on the rotary table (1), the main arm (7) is hinged to the rotary table (1), the amplitude variation pulley block (3) comprises a first pulley and a second pulley which is relatively fixed to the first pulley, the mast (4) is rotatably arranged at one end of the rotary table (1), the first pulley is hinged to the other end of the rotary table (1), an elevating device for elevating the second pulley is arranged on the rotary table (1), a steel wire rope (5) led out of the amplitude variation device (2) sequentially passes through the top end of the mast (4), the amplitude variation pulley block (3) and the top end of the mast (4), and the top end of the mast (4) is connected with a pulling plate (8) at the boom raising end of the main arm (7).

2. The crawler crane according to claim 1, wherein the elevating device comprises an oil cylinder and a limiting block arranged at an output shaft end of the oil cylinder, the oil cylinder is mounted on the turntable (1), the limiting block is provided with a sliding groove, and a main shaft of the second pulley is slidably limited and arranged inside the sliding groove.

3. Crawler crane according to claim 1, wherein the elevating means comprise a steel plate frame fixedly mounted on the turntable (1), the second pulley being rotatably arranged on the steel plate frame.

4. A crawler crane according to claim 1, wherein the elevating means is provided as a guy cable (6), one end of the guy cable (6) is connected to the luffing pulley block (3) at the end near the second pulley, and the other end is fixed at another position on the non-luffing pulley block (3).

5. The crawler crane according to claim 4, wherein the turntable (1) and the luffing pulley block (3) are fixedly provided with pull rings at one ends close to the second pulley, and the two ends of the guy cable (6) are fixedly connected through the pull rings.

6. A crawler crane according to claim 4, wherein the turntable (1) is provided with a winding mechanism, a pull ring is fixedly arranged at one end of the luffing pulley block (3) close to the second pulley, one end of the guy cable (6) is wound on the winding mechanism, and the other end of the guy cable (6) is connected to the pull ring.

7. A crawler crane according to any one of claims 1-6, wherein the line connecting the first pulley and the second pulley is perpendicular to the line connecting the second pulley and the top end of the mast (4).