Pulley rope-winding structure for trolley and lifting hook and tower crane

Abstract

A pulley rope-winding structure for a trolley and a lifting hook, and a tower crane. The pulley rope-winding structure comprises a trolley pulley module (120a), a lifting hook pulley module (300), a switching pulley module (200), and a steel wire rope (500). The trolley pulley module (120a) comprises a first pulley (122), a second pulley (123) and a third pulley (124) which are arranged on the trolley (100) and are distributed in a straight-line direction, and an included angle between the connecting-line direction and a length direction of the trolley (100) is an acute angle; the lifting hook pulley module (300) is arranged below the trolley pulley module (120a); the switching pulley module (200) is arranged between the lifting hook pulley module (300) and the trolley pulley module (120a), and the switching pulley module (200) can be switchably connected to the trolley (100) or lifting hook pulley module (300); the wire steel rope (500) is threaded through the first pulley (122) and is sequentially wound around the second pulley (123), the switching pulley module (200), the second pulley (123), the third pulley (124), and the lifting hook pulley module (300), and finally exits from the first pulley (122). In the present rope-winding structure, the steel wire rope does not interfere with the pulleys, the lifting hook pulley module (300) has good centering performance, and automatic ratio switching is achieved.

Description

Pulley rope winding structure of trolley and hook and tower crane

[0001] Cross-reference to Related Applications

[0002] This application claims priority to the Chinese patent application No. 202410656735.3, filed on May 24, 2024, and entitled "Pulley rope winding structure of trolley and hook and tower crane", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of engineering machinery, in particular, to a pulley rope winding structure of trolley and hook and a tower crane. BACKGROUND

[0004] With the development of the construction industry, the requirements for the working conditions of tower cranes are also becoming higher and higher. The conventional luffing jib tower crane does not have a trolley structure, and only the flat jib tower crane can rely on the trolley to perform luffing operations. The flat jib tower crane requires a large operating space, and cannot operate at some space-limited locations. Such working conditions require a luffing jib tower crane, but the luffing jib tower crane has low luffing efficiency and high cost, and is only used in space-limited situations, so its range of use is relatively small compared to the flat jib tower crane.

[0005] The two fixed pulleys at the ends of the hoisting wheel set in the traditional trolley are arranged horizontally and have the same height. Directly applied to a luffing jib tower crane, when the luffing angle of the boom reaches the maximum, the projection distance between the two fixed pulleys on the horizontal plane is reduced. In this state, the wire rope position of the hoisting wire rope is easy to interfere with the fixed and positioning pulleys, and in severe cases, the hook cannot lift heavy objects. Therefore, the pulley arrangement and rope winding method in the traditional trolley are not suitable for luffing jib tower cranes. TECHNICAL SOLUTION

[0006] The purpose of the present application is to provide a pulley rope winding structure of trolley and hook and a tower crane, to solve the problem that the pulley arrangement and rope winding method in the traditional trolley are not suitable for luffing jib tower cranes in the prior art.

[0007] To achieve the above purpose, in a first aspect, the present application provides a pulley rope winding structure of trolley and hook, comprising:

[0008] A trolley pulley module, comprising a first pulley, a second pulley and a third pulley arranged on the trolley and distributed in a straight line direction, the included angle between the line direction of the first pulley, the second pulley and the third pulley and the length direction of the trolley is an acute angle;

[0009] A hook pulley module arranged below the trolley pulley module;

[0010] A switching pulley module is arranged between the trolley pulley module and the hook pulley module, and the switching pulley module is capable of switching connection with the trolley pulley module or the hook pulley module.

[0011] A steel wire rope is threaded through the first pulley and sequentially threaded over the second pulley, the switching pulley module, the second pulley, the third pulley and the hook pulley module, and then threaded out of the first pulley.

[0012] As a further improvement of the above technical solution:

[0013] In a possible implementation, the distance between the first pulley and the second pulley is greater than the distance between the second pulley and the third pulley.

[0014] In a possible implementation, a guide connecting piece is arranged on the axle of the second pulley, and the switching pulley module is capable of automatic abutting connection with the guide connecting piece.

[0015] In a possible implementation, the distance between the first pulley and the second pulley is defined as L1, and the distance between the second pulley and the third pulley is defined as L2, L2=(La+Lb) / 2.

[0016] Wherein, La is the distance between the second pulley and the third pulley calculated when L1 is a fixed value and the arm of the tower crane is in a flat arm mode; Lb is the distance between the second pulley and the third pulley calculated when L1 is a fixed value and the arm is in a luffing mode and the luffing angle is θ; and the switching pulley module can automatically switch connection with the trolley pulley module and the hook pulley module within the luffing angle θ.

[0017] In a possible implementation, the first pulley and the second pulley each include at least two fixed pulleys arranged along the axial direction thereof.

[0018] In a possible implementation, the switching pulley module includes:

[0019] A switching wheel frame is provided with a rotatable pulley body and a fixed pin, the pulley body has the steel wire rope threaded thereon, and the fixed pin is used for abutting cooperation with the guide connecting piece on the trolley.

[0020] A hanging assembly is arranged on the switching wheel frame and located below the fixed pin, and when the fixed pin and the guide connecting piece abut against each other, the steel wire rope is used to drive the hook pulley module to ascend and be buckled or unbuckled with the hanging assembly.

[0021] In a possible implementation, the hanging assembly has an unfolded state and a folded state.

[0022] The hook pulley module is further sequentially provided with a connecting hanging pin and an adjusting member in a vertical direction from top to bottom.

[0023] The connecting hanging pin is capable of being buckled with the hanging assembly in the folded state of the hanging assembly and being unbuckled from the hanging assembly in the unfolded state of the hanging assembly. Under the driving of the steel wire rope, the adjusting member is capable of acting on the hanging assembly to keep the hanging assembly in the unfolded state and be unbuckled from the connecting hanging pin.

[0024] In a possible implementation, the hook pulley module further comprises a hook frame, the hook frame is provided with a long hole penetrating in a thickness direction and extending in a vertical direction, and the adjusting member is slidingly accommodated in the long hole.

[0025] In a possible implementation, the hanging assembly comprises two hanging pieces arranged in position, the upper ends of the two hanging pieces are both hinged with the switching wheel frame, and the opposite sides of the two hanging pieces are sequentially provided with a hanging groove buckled with the connecting hanging pin and a protrusion matched with the adjusting member from top to bottom.

[0026] The ends of the two hanging pieces away from the switching wheel frame are formed with diverging mouths for the connecting hanging pin and the adjusting member to enter.

[0027] To achieve the above-mentioned purpose, in a second aspect, the application further provides a tower crane, comprising a boom, a trolley, a hook and a pulley rope structure of the trolley and the hook according to the first aspect, wherein the boom comprises a dynamic arm mode and a flat arm mode. Advantages

[0028] The application provides a pulley rope structure of a trolley and a hook and a tower crane, wherein in the pulley rope structure of the trolley and the hook, the first pulley, the second pulley and the third pulley in the trolley pulley module are arranged in a linear direction, and the included angle between the connecting line direction of the first pulley, the second pulley and the third pulley and the length direction of the trolley is an acute angle, i.e. the first pulley, the second pulley and the third pulley are arranged in a linear and inclined manner. In this way, after the first pulley, the second pulley and the third pulley are arranged in a linear and inclined manner, on the one hand, the winding of the steel wire rope is facilitated, i.e. the steel wire rope can be quickly wound without changing the different insertion directions; on the other hand, even if the luffing angle of the boom reaches the maximum state, the spacing between the first pulley and the third pulley is significantly increased compared with the spacing when the pulleys are arranged horizontally in the prior art, and the running mode of the steel wire rope will not interfere with the trolley frame, so that the pulley rope structure of the trolley and the hook provided by the application can be applied to the boom in a dynamic arm mode or a flat arm mode.

[0029] Further, in combination with the pulley winding structure of the trolley and the hook in the present application, the hook pulley module (the hook pulley module is connected with the hook body) is better in centralization. Therefore, the switching pulley module is automatically switched to be connected with the trolley in the connection state with the hook pulley module, and the automatic magnification switching is more smooth, so that the automatic magnification switching is successfully completed. BRIEF DESCRIPTION OF DRAWINGS

[0030] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, and together with the specific embodiments described below, serve to explain the present application. It should be understood that the following drawings are only some embodiments of the present application, and therefore should not be considered as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor. In the drawings:

[0031] Fig. 1 shows a three-dimensional structure schematic diagram of the assembly state of the boom and the trolley provided by the embodiment of the present application;

[0032] Fig. 2 shows a three-dimensional structure schematic diagram of a trolley provided by the embodiment of the present application;

[0033] Fig. 3 shows a structure schematic diagram of the first pulley, the second pulley and the third pulley distributed in a straight line direction on the hoisting wheel frame in the embodiment;

[0034] Fig. 4 shows a structure schematic diagram of the trolley, the switching pulley module and the hook 4-magnification winding in a flat arm mode provided by the embodiment of the present application;

[0035] Fig. 5 shows a structure diagram of the trolley, the switching pulley module and the hook 4-magnification winding in the flat arm mode in Fig. 4;

[0036] Fig. 6 shows a structure schematic diagram of the trolley, the switching pulley module and the hook 2-magnification winding in a flat arm mode provided by the embodiment of the present application;

[0037] Fig. 7 shows a structure diagram of the trolley, the switching pulley module and the hook 2-magnification winding in the flat arm mode in Fig. 6;

[0038] Fig. 8 shows a structure schematic diagram of the trolley, the switching pulley module and the hook 4-magnification winding in a dynamic arm mode and the maximum tilt angle of the boom provided by the embodiment of the present application;

[0039] Fig. 9 shows a structure schematic diagram of the trolley, the switching pulley module and the hook 2-magnification winding in a dynamic arm mode and the maximum tilt angle of the boom provided by the embodiment of the present application;

[0040] Fig. 10 shows a schematic diagram of the distance between the second pulley and the third pulley in the flat arm mode (a) and the distance between the second pulley and the third pulley in the swing arm mode (b) determined by the mapping method according to an embodiment of the present application;

[0041] Fig. 11 shows a front view of the cooperation between the switching pulley module and the hook according to an embodiment of the present application;

[0042] Fig. 12 shows a side view of the cooperation between the switching pulley module and the hook according to an embodiment of the present application;

[0043] Fig. 13 shows an enlarged schematic view of the part A in Fig. 12;

[0044] Fig. 14 shows a schematic diagram of the cooperation between the trolley stopper and the guide connecting piece according to an embodiment of the present application;

[0045] Fig. 15 shows a schematic diagram of the cooperation between the guide part and the connecting lug plate when the trolley moves to the arm tip according to an embodiment of the present application.

[0046] Legend 100, trolley; 110, trolley frame; 111, support column; 112, height increasing support leg; 113, support pad; 120, hoisting wheel assembly; 121, hoisting wheel frame; 1210, load bearing side plate; 1211, reinforcing rib; 1212, guide part; 120a, trolley pulley module; 122, first pulley; 123, second pulley; 124, third pulley; 125, stopper; 1250, mounting part; 1251, bent part; 1252, stopper; 1253, avoiding gap; 130, guide connecting piece; 131, guide gap; 200, switching pulley module; 210, switching wheel frame; 220, hanging assembly; 221, hanging piece; 222, hanging groove; 223, protrusion; 224, gradually expanding port; 230, pulley body; 240, fixing pin; 300, hook pulley module; 310, connecting hanging pin; 320, adjusting piece; 330, hook frame; 340, hook body; 350, fourth pulley; 360, fifth pulley; 400, arm frame; 410, arm tip; 411, connecting lug plate; 500, steel wire rope. DETAILED DESCRIPTION

[0047] The specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application.

[0048] The present application will be described in detail below with reference to the accompanying drawings and in conjunction with exemplary embodiments.

[0049] Embodiment One

[0050] Please refer to FIG. 1, FIG. 2, FIG. 3, FIG. 4 and FIG. 5, the embodiment provides a trolley and hook pulley rope structure, which can be applied to a tower crane in flat boom mode and luffing mode. The tower crane comprises a boom 400, a trolley 100 and a hook.

[0051] The boom 400 comprises a luffing mode and a flat boom mode. The trolley 100 is movably arranged on the boom 400, and the hook is suspended on the trolley 100 by a wire rope 500. When the boom 400 is in the flat boom mode for operation, the trolley 100 can move along the boom 400 for amplitude variation; when the boom 400 is switched to the luffing mode, the trolley 100 is locked and fixed at the boom tip 410 of the boom 400, and the trolley 100 can perform luffing movement with the boom 400.

[0052] In the embodiment, the trolley and hook pulley rope structure comprises a trolley pulley module 120a, a hook pulley module 300, a switching pulley module 200 and a wire rope 500. The trolley pulley module 120a comprises a first pulley 122, a second pulley 123 and a third pulley 124 arranged on the trolley 100 and distributed in a straight line direction, and the included angle between the line direction of the first pulley 122, the second pulley 123 and the third pulley 124 and the length direction of the trolley 100 is an acute angle; that is, the first pulley 122, the second pulley 123 and the third pulley 124 are located on the same straight line and inclined at a certain angle. The length direction of the trolley frame 110 is indicated by the arrow L in FIG. 2.

[0053] It should be noted that after the trolley 100 is installed on the boom 400, the distance between the first pulley 122 and the boom 400 is less than the distance between the third pulley 124 and the boom 400, and the third pulley 124 is closer to the boom tip 410 of the boom 400 than the first pulley 122 and the second pulley 123, so that the line direction of the first pulley 122, the second pulley 123 and the third pulley 124 is inclined downward to the boom tip 410. Thus, compared with the equal interval arrangement, the interval of the first pulley 122, the second pulley 123 and the third pulley 124 is different, which can make the overall centering of the hook better.

[0054] The hook pulley module 300 is arranged below the trolley pulley module 120a. The switching pulley module 200 is arranged between the hook pulley module 300 and the trolley pulley module 120a, and the switching pulley module 200 can be switched to connect with the trolley 100 or the hook pulley module 300.

[0055] The wire rope 500 is sequentially threaded through the first pulley 122, the second pulley 123, the switching pulley module 200, the second pulley 123, the third pulley 124 and the hook pulley module 300, and then threaded out of the first pulley 122.

[0056] Further, in the embodiment, the first pulley 122 and the second pulley 123 each include at least two independent rotating fixed pulleys arranged along the axis of the pulley. Alternatively, the first pulley 122 and the second pulley 123 are double pulley structures.

[0057] Please refer to FIG. 3, FIG. 4, FIG. 5, FIG. 6, FIG. 7, FIG. 8 and FIG. 9. Compared with the prior art, the pulley winding structure of the trolley and the hook provided by the embodiment arranges the first pulley 122, the second pulley 123 and the third pulley 124 linearly and obliquely, which can facilitate the winding of the steel wire rope 500, i.e. the steel wire rope 500 can be quickly wound without changing the different insertion directions. On the other hand, even if the luffing angle of the boom 400 reaches the maximum state, the spacing between the first pulley 122 and the third pulley 124 is significantly increased compared with the spacing when arranged horizontally in the prior art, and the running mode of the steel wire rope 500 will not interfere with the trolley frame 110 of the trolley 100. Therefore, the pulley winding structure of the trolley and the hook provided by the embodiment can be applied to the boom 400 in the swing mode or the fixed mode.

[0058] Further, in combination with the winding mode of the steel wire rope 500, the in and out of the switching pulley module 200 are associated with the second pulley 123, the in of the hook pulley module 300 comes from the third pulley 124, and the out is connected to the first pulley 122. In this way, the hook pulley module 300 (the hook pulley module 300 is connected to the hook body 340) is more centered, and thus the switching pulley module 200 is more smoothly switched from the connection state with the hook pulley module 300 to the connection state with the trolley 100, thereby successfully completing the automatic magnification switching.

[0059] Please refer to FIG. 3. Further, the connecting line distance between the first pulley 122 and the second pulley 123 is greater than the connecting line distance between the second pulley 123 and the third pulley 124. The second pulley 123 is provided with a guide connecting piece 130 on the shaft, and the switching pulley module 200 can be automatically connected to the guide connecting piece 130.

[0060] It can be understood that the first pulley 122, the second pulley 123 and the third pulley 124 are arranged at non-equal intervals, and the second pulley 123 is closer to the third pulley 124, so that the vertical center line of the second pulley 123 is closer to the gravity center of the hook pulley module 300. In this case, it can be ensured that the hook pulley module 300 is in the center position when it is lifted to the upper position for magnification switching, and the magnification switching is successfully completed.

[0061] Please refer to FIG. 3 and FIG. 10. Specifically, the connecting line distance between the first pulley 122 and the second pulley 123 is defined as L1, and the connecting line distance between the second pulley 123 and the third pulley 124 is defined as L2. Wherein, L2 = (La + Lb) / 2.

[0062] La is the distance between the second pulley 123 and the third pulley 124 calculated when L1 is a fixed value and the jib 400 of the tower crane is in the flat mode; Lb is the distance between the second pulley 123 and the third pulley 124 calculated when L1 is a fixed value and the jib 400 is in the luffing mode and the luffing angle is θ; and the switching pulley module 200 can be automatically switched and connected with the guide connecting piece 130 and the hook pulley module 300 within the range of the luffing angle θ.

[0063] Specifically, θ is half of the maximum luffing angle of the jib 400 under the condition that the switching pulley module 200 can be automatically switched and connected with the guide connecting piece 130 and the hook pulley module 300. For example, if the maximum luffing angle of the jib 400 under the condition that the switching pulley module 200 can be automatically switched and connected with the guide connecting piece 130 and the hook pulley module 300 is 20°, then θ is 10°.

[0064] In the embodiment, the hook pulley module 300 includes the fourth pulley 350 and the fifth pulley 360 arranged side by side, the fourth pulley 350 is located on the same side as the third pulley 124, and the fifth pulley 360 is located on the same side as the first pulley 122.

[0065] The determination methods of La and Lb are the same, and the determination method of La is exemplified below.

[0066] Specifically, the determination method of La includes: determining the deflection angle of the steel wire rope 500 wound around the fifth pulley 360 and the first pulley 122 when L1 is a fixed value and the jib 400 of the tower crane is in the flat mode; and making a ray with the center of the fourth pulley 350 as the starting point according to the deflection angle, so that the ray intersects with the extension line of the line connecting the first pulley 122 and the second pulley 123. The angle between the ray and the vertical direction is equal to the deflection angle, and the distance between the intersection point and the center of the second pulley 123 is La.

[0067] It can be understood that La and Lb are both determined by the graphical method, and the determination method is described in detail below in combination with the drawings:

[0068] (1) In the flat mode, the jib 400 is in a horizontal state, and at this time θ = 0°.

[0069] First step: first determine the length of L1 (a fixed value can be directly given according to design requirements), then place the hook pulley module 300 in the initial state, measure the center distance L3 between the first pulley 122 and the fifth pulley 360, and measure the distance L4 between the center line passing through the center of the first pulley 122 and the center of the fifth pulley 360 along the vertical direction;

[0070] Second step: calculate the deflection angle a of the steel wire rope 500 between the first pulley 122 and the fifth pulley 360, wherein a = arcsin(L3 / L4);

[0071] Third step: determine the deflection angle b of the steel wire rope 500 between the fourth pulley 350 and the third pulley 124 according to the determined deflection angle a, wherein b = a;

[0072] Fourth step: according to the deflection angle b of the steel wire rope 500 between the fourth pulley 350 and the third pulley 124, a ray is drawn from the center of the fourth pulley 350, so that the ray intersects with the extension line of the connecting line of the first pulley 122 and the second pulley 123.

[0073] Fifth step: the distance between the intersection point in the fourth step and the center of the second pulley 123 is Lb.

[0074] (2) In the boom mode, the luffing angle of the boom 400 is θ, and at this time θ = 10°. The same steps as in the above (1) are performed, and finally the distance between the intersection point and the center of the second pulley 123 is Lb.

[0075] In this way, in combination with the above (1) and (2), the connecting line distance L2 between the second pulley 123 and the third pulley 124 is calculated, wherein L2 = (La+Lb) / 2.

[0076] Please refer to FIGS. 2, 4, 6 and 11, the above-mentioned switching pulley module 200 includes a switching wheel frame 210 and a hanging assembly 220; the switching wheel frame 210 is provided with a rotatable pulley body 230 and a fixed pin 240, the pulley body 230 is provided with a steel wire rope 500, and the fixed pin 240 is used for abutting and cooperating with the guide connecting piece 130 on the trolley 100. The hanging assembly 220 is arranged on the switching wheel frame 210 and located below the fixed pin 240. When the fixed pin 240 abuts and cooperates with the guide connecting piece 130, the steel wire rope 500 is used to drive the lifting hook pulley module 300 to ascend and buckle or unbuckle with the hanging assembly 220, so as to realize the switching of the rope winding ratio of the trolley pulley module 120a and the lifting hook pulley module 300.

[0077] Please refer to FIGS. 12 and 13, in detail, the hanging assembly 220 has an unfolded state and a folded state. The lifting hook pulley module 300 is further provided with a connecting hanging pin 310 and an adjusting piece 320 from top to bottom in the vertical direction. The connecting hanging pin 310 can buckle and connect with the hanging assembly 220 in the unfolded state of the hanging assembly 220, and can be unbuckled with the hanging assembly 220 in the folded state of the hanging assembly 220. Under the driving of the steel wire rope 500, the adjusting piece 320 can act on the hanging assembly 220, so that the hanging assembly 220 remains in the unfolded state and is unbuckled with the connecting hanging pin 310.

[0078] Please refer to FIG. 4, FIG. 6, FIG. 11, FIG. 12 and FIG. 13, in order to more clearly describe the technical solutions of the present embodiment, the following will be described in detail the rope winding ratio switching of the trolley pulley module 120a and the hook pulley module 300, as follows:

[0079] The initial state is defined as the switching pulley module 200 is separated from the guide connecting piece 130, and the hanging assembly 220 of the switching pulley module 200 is connected with the hook pulley module 300, so that the switching pulley module 200 and the hook pulley module 300 are connected as a whole and located below the trolley pulley module 120a. At this time, the trolley pulley module 120a and the hook pulley module 300 are 4 times of rope winding.

[0080] (a) When it is needed to switch from 4 times of rope winding to 2 times of rope winding;

[0081] First step, drive the whole switching pulley module 200 and hook pulley module 300 to lift a first preset stroke through the steel wire rope 500, so that the guide connecting piece 130 abuts against the fixed pin 240 on the switching wheel frame 210;

[0082] Second step, continue to drive the hook pulley module 300 to lift, so that the adjusting piece 320 acts on the hanging assembly 220, and the hanging assembly 220 is switched to the unfolded state and remains, at this time, since the hanging assembly 220 is in the unfolded state, the connecting hanging pin 310 on the switching wheel frame 210 and the hanging assembly 220 in the unfolded state automatically complete the decoupling;

[0083] Third step, finally, through the steel wire rope 500, the hook pulley module 300 can be separated from the switching pulley module 200, and the 4 times of rope winding is switched to the 2 times of rope winding, at this time, the switching pulley module 200 remains abutting against the guide connecting piece 130.

[0084] (b) When it is needed to switch from 2 times of rope winding to 4 times of rope winding;

[0085] First step, the switching pulley module 200 remains abutting against the guide connecting piece 130, drive the whole hook pulley module 300 to lift a second preset stroke through the steel wire rope 500, so that the connecting hanging pin 310 on the switching wheel frame 210 contacts the hanging assembly 220;

[0086] Second step, continue to lift the hook pulley module 300, the connecting hanging pin 310 acts on the hanging assembly 220 to unfold the hanging assembly 220, until the connecting hanging pin 310 is lifted to the position of buckling with the hanging assembly 220, the hanging assembly 220 is automatically folded (which can be driven by a spring, a spring piece or a torsional spring) and the connecting hanging pin 310 is automatically buckled, so that the switching pulley module 200 and the hook are connected as a whole again;

[0087] Thirdly, the steel wire rope 500 is released, the switching pulley module 200 and the hook pulley module 300 are lowered as a whole, and the 2 times winding ratio is switched to the 4 times winding ratio. At this time, since the switching pulley module 200 and the guide connecting piece 130 are only in abutting connection (i.e. contact without fixed connection), the switching pulley module 200 and the guide connecting piece 130 can be automatically separated.

[0088] The hook pulley module 300 further comprises a hook frame 330, the hook frame 330 is provided with a long hole penetrating in the thickness direction and extending in the vertical direction, and the adjusting piece 320 is slidingly accommodated in the long hole. The adjusting piece 320 has a certain travel on the hook frame 330, so that the lowering time of the adjusting piece 320 and the connecting hanging pin 310 is staggered in the third step of switching the 4 times winding ratio to the 2 times winding ratio, so that the connecting hanging pin 310 can be completely decoupled from the hanging assembly 220, and the successful completion of the winding ratio switching is improved.

[0089] Further, the adjusting piece 320 is a ring structure; the hook frame 330 comprises two oppositely arranged frame bodies, each of which is provided with two long holes, and the long holes on the two frame bodies correspond to each other. The adjusting piece 320 is connected through the four long holes, so as to ensure that the adjusting piece 320 does not come out of the penetration direction of the long hole during sliding along the long hole.

[0090] The hanging assembly 220 comprises two oppositely arranged hanging pieces 221, the upper ends of the two hanging pieces 221 are hingedly connected with the switching wheel frame 210, and the opposite sides of the two hanging pieces 221 are sequentially provided from top to bottom with a hanging groove 222 for buckling the connecting hanging pin 310 and a protrusion 223 for cooperating with the adjusting piece 320. In this way, when the adjusting piece 320 enters the two hanging pieces 221, it can be stably clamped on the positioning protrusion 223. Alternatively, in the direction of the opposite arrangement of the two connecting pieces, the protrusion 223 is spherical or spherical segment in cross-sectional shape.

[0091] Further, the ends of the two hanging pieces 221 away from the switching wheel frame 210 are formed with a gradually expanding port 224 for the connecting hanging pin 310 and the adjusting piece 320 to enter. That is to say, the distance between the ends of the two hanging pieces 221 away from the switching wheel frame 210 gradually increases in the direction away from the switching wheel frame 210, so as to facilitate the adjusting piece 320 and the connecting hanging pin to smoothly enter between the two hanging pieces 221.

[0092] Embodiment two

[0093] Please refer to FIGS. 1-15, the application further provides a tower crane. The tower crane comprises a jib 400, a trolley 100, a hook, and a pulley winding structure of the trolley and the hook according to the first aspect described above, wherein the jib 400 comprises a dynamic arm mode and a flat arm mode.

[0094] Please refer to FIG. 1 and FIG. 2, wherein the trolley 100 comprises a trolley frame 110, a hoisting wheel assembly 120 and a guide connecting piece 130. The hoisting wheel assembly 120 comprises a hoisting wheel frame 121 and a trolley pulley module 120a, the hoisting wheel frame 121 is welded on the trolley frame 110, the trolley pulley module 120a comprises a first pulley 122, a second pulley 123 and a third pulley 124 which are arranged on the hoisting wheel frame 121 and are distributed in a straight line direction, the included angle between the line direction of the first pulley 122, the second pulley 123 and the third pulley 124 and the length direction of the trolley 100 is an acute angle; that is to say, the first pulley 122, the second pulley 123 and the third pulley 124 are located on the same straight line and are inclined at a certain angle. The arrangement of the above-mentioned first pulley 122, the second pulley 123 and the third pulley 124 is described in detail in one embodiment, and will not be described again in this embodiment.

[0095] Please refer to FIG. 14, further, the guide connecting piece 130 is rotatably arranged on the axle of the second pulley 123, and is used for abutting and cooperating with the switching pulley module 200 which switches the gear ratio. The guide connecting piece 130 is in an active state, and under the action of its own gravity, the guide connecting piece 130 is always in a vertical downward state when the boom 400 performs the luffing movement, so that the switching pulley module 200 can abut and cooperate with the guide connecting piece 130 when the hook switches the gear ratio.

[0096] Optionally, the guide connecting piece 130 is a guide plate, and the end of the guide plate away from the trolley frame 110 is provided with a guide notch 131 used for abutting and cooperating with the switching pulley module 200. The opening of the lower end of the guide notch 131 is in a trumpet shape, so as to facilitate the fixed pin 240 (described below) in the switching pulley module 200 to enter the guide notch 131 for guiding.

[0097] It should be noted that after the trolley 100 is installed on the boom 400, the distance between the first pulley 122 and the boom 400 is less than the distance between the third pulley 124 and the boom 400, and the third pulley 124 is closer to the jib tip 410 of the boom 400 than the first pulley 122 and the second pulley 123, so that the line connecting the first pulley 122, the second pulley 123 and the third pulley 124 is inclined towards the lower side of the jib tip 410. Thus, compared with the equal interval arrangement, the interval of the first pulley 122, the second pulley 123 and the third pulley 124 is different, which makes the whole hook more centered.

[0098] Thus, the trolley 100 provided by the embodiment is suitable for the flat boom mode and the movable boom mode. The first pulley 122, the second pulley 123 and the third pulley 124 in the hoisting wheel assembly 120 are arranged in a linear direction and are arranged at an acute angle with the length direction of the trolley frame 110, that is, the pulleys are arranged in an inclined manner. Thus, when the hoisting assembly is not changed and the luffing angle of the boom 400 reaches the maximum, the spacing between the first pulley 122 and the third pulley 124 is obviously increased compared with the spacing in the horizontal arrangement in the prior art, and the wire rope 500 does not interfere with the trolley frame 110 when the wire rope 500 runs. Thus, the trolley 100 provided by the embodiment is suitable for the boom 400 in the movable boom mode or the flat boom mode, and the size of the trolley frame 110 does not need to be increased, and the size and weight of the trolley 100 can remain unchanged, thereby guaranteeing the load performance of the boom 400.

[0099] The hoisting wheel frame 121 includes two load-bearing side plates 1210 arranged in position, and the two load-bearing side plates 1210 are connected by a reinforcing rib 1211. The two load-bearing side plates 1210 form a receiving space for accommodating the first pulley 122, the second pulley 123 and the third pulley 124. The reinforcing rib 1211 can enhance the structural strength of the hoisting wheel frame 121.

[0100] Optionally, the two load-bearing side plates 1210 are welded to the trolley frame 110.

[0101] Optionally, the two load-bearing side plates 1210 are provided with hollow hole regions to reduce the weight.

[0102] Please refer to Fig. 15, further, the two load-bearing side plates 1210 are further provided with guide portions 1212. The guide portions 1212 are located at the top of the side of the load-bearing side plate 1210 close to the third pulley 124. The guide portions 1212 of the two load-bearing side plates 1210 form a guide gap for the connecting lug plate 411 at the end of the boom tip 410 of the boom 400 to pass through. The guide gap formed by the hoisting wheel frame 121 can guide the trolley 100 when the trolley 100 moves to the boom tip 410. When the trolley 100 moves to the end of the boom tip 410, the connecting lug plate 411 enters between the two load-bearing side plates 1210, and then is locked and fixed by a locking pin.

[0103] Optionally, the guide portions 1212 are formed by inwardly bending the two load-bearing side plates 1210 or welding guide blocks.

[0104] In the embodiment, the hoisting wheel assembly 120 further comprises a rotation-stopping piece 125, and the hoisting wheel frame 121 is further provided with at least one rotation-stopping piece 125, which is used to abut against the wheel shaft of the second pulley 123 to limit the rotation of the wheel shaft of the second pulley 123. It can be understood that, in the embodiment, the hoisting wheel frame 121 has two load-bearing side plates 1210, and the wheel shaft of the second pulley 123 is mounted on each load-bearing side plate 1210. In order to facilitate the disassembly of the second pulley 123, the wheel shaft of the second pulley 123 is detachably connected with the load-bearing side plate 1210, and thus the rotation-stopping piece 125 is arranged on each load-bearing side plate 1210 to limit the rotation of the wheel shaft of the second pulley 123 exposed outside the load-bearing side plate 1210.

[0105] Specifically, the rotation-stopping piece 125 comprises an installation portion 1250, a bending portion 1251 and a rotation-stopping portion 1252 which are connected as one body, the installation portion 1250 is connected with the hoisting wheel frame 121, and the rotation-stopping portion 1252 is abutted against the wheel shaft of the second pulley 123 at an end away from the bending portion 1251. The rotation-stopping portion 1252 and the corresponding load-bearing side plate 1210 of the hoisting wheel frame 121 form an avoiding gap for the avoiding guide connecting piece 130, which can avoid the interference of the rotation-stopping piece 125 with the movement of the guide connecting piece 130.

[0106] Considering that the second pulley 123 needs to be disassembled, in the embodiment, the rotation-stopping piece 125 and the load-bearing side plate 1210 are connected by screws. The installation portion 1250 is provided with a through hole through which the screw passes, and the screw is threadedly connected with the load-bearing side plate 1210 after passing through the through hole. The rotation-stopping portion 1252 is provided with a corresponding avoiding gap 1253 corresponding to the through hole of the installation portion 1250, so as to facilitate the screwing of the tool.

[0107] Please refer to FIG. 2, the four sides of the frame 110 are provided with support columns 111, the bottom of the support column 111 is provided with a heightening leg 112, the bottom of the heightening leg 112 is provided with a support pad 113, and the surface area of the support pad 113 is greater than the cross-sectional area of the heightening leg 112.

[0108] In the embodiment, the heightening leg 112 is a reinforced circular pipe, which can reduce the structural weight of the frame 110 and facilitate the placement of the trolley 100 on the ground without damaging the related accessories on the load-bearing side plate 1210 and the frame 110.

[0109] In the description of the present application, it should be understood that the terms "first", "second" are only used for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0110] In this application, unless otherwise clearly indicated and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection or communication with each other; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0111] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0112] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A trolley and hook pulley roping arrangement characterised in that, The utility model relates to a kind of crane trolley and hook pulley module, including: Trolley pulley module (120a), including being arranged on trolley (100) and being distributed in straight line direction first pulley (122), second pulley (123) and third pulley (124), the included angle of the line direction of first pulley (122), second pulley (123) and third pulley (124) with the length direction of trolley (100) is acute angle; Hook pulley module (300) is arranged below trolley pulley module (120a); Switching pulley module (200) is arranged between hook pulley module (300) and trolley pulley module (120a), and switching pulley module (200) can be switched with trolley (100) or hook pulley module (300) connection;And Steel wire rope (500) is passed into first pulley (122) and sequentially passes over second pulley (123), switching pulley module (200), second pulley (123), third pulley (124) and hook pulley module (300), and then is passed out from first pulley (122).

2. The trolley and hook pulley roping arrangement of claim 1 wherein, The line distance between the first pulley (122) and the second pulley (123) is greater than the line distance between the second pulley (123) and the third pulley (124).

3. The trolley and hook pulley roping arrangement of claim 1 wherein, The axle of the second pulley (123) is provided with a guide connecting piece (130), and the switching pulley module (200) can be automatically connected with the guide connecting piece (130).

4. The trolley and hook pulley roping arrangement according to claim 2 or 3, characterised in that, The line distance between the first pulley (122) and the second pulley (123) is defined as L1, and the line distance between the second pulley (123) and the third pulley (124) is L2, L2=(La+Lb) / 2. Wherein, La is the line distance between the second pulley (123) and the third pulley (124) calculated when L1 is a fixed value and the arm support (400) of the tower crane is in a flat arm mode; Lb is the line distance between the second pulley (123) and the third pulley (124) calculated when L1 is a fixed value and the arm support (400) is in a luffing mode and the luffing angle is θ; and within the luffing angle θ range, the switching pulley module (200) can automatically switch connection with the trolley (100) and the hook pulley module (300).

5. The trolley and hook pulley roping arrangement of claim 1 wherein, The first pulley (122) and the second pulley (123) each include at least two fixed pulleys arranged along the axial direction thereof.

6. The trolley and hook pulley roping arrangement of claim 1 wherein, The switching pulley module (200) includes: A switching wheel frame (210) is provided with a rotatable pulley body (230) and a fixed pin (240) thereon, the pulley body (230) has the steel wire rope (500) wound thereon, and the fixed pin (240) is used for abutting cooperation with the guide connecting piece (130) on the trolley (100);And The hanging assembly (220) is arranged on the switching wheel frame (210) and below the fixed pin (240). When the fixed pin (240) is in abutting connection with the guide connecting piece (130), the steel wire rope (500) is used to drive the lifting hook pulley module (300) to ascend and buckle or unbuckle with the hanging assembly (220).

7. The trolley and hook pulley roping arrangement of claim 6 wherein, The hanging assembly (220) has an unfolded state and a folded state. The lifting hook pulley module (300) is further provided with a connecting hanging pin (310) and an adjusting piece (320) in sequence from top to bottom in the vertical direction. The connecting hanging pin (310) can be buckled with the hanging assembly (220) in the folded state of the hanging assembly (220) and can be unbuckled with the hanging assembly (220) in the unfolded state of the hanging assembly (220). Under the driving of the steel wire rope (500), the adjusting piece (320) can act on the hanging assembly (220) to keep the hanging assembly (220) in the unfolded state and unbuckled with the connecting hanging pin (310).

8. The trolley and hook pulley roping arrangement of claim 7, wherein, The lifting hook pulley module (300) further comprises a lifting hook frame (330), and the lifting hook frame (330) is provided with a long slot penetrating in the thickness direction and extending in the vertical direction. The adjusting piece (320) is slidingly accommodated in the long slot.

9. The trolley and hook pulley roping arrangement of claim 7 wherein, The hanging assembly (220) comprises two hanging pieces (221) arranged in position. The upper ends of the two hanging pieces (221) are hingedly connected with the switching wheel frame (210). The opposite sides of the two hanging pieces (221) are provided with a hanging groove (222) buckled with the connecting hanging pin (310) and a protrusion (223) matched with the adjusting piece (320) in sequence from top to bottom. The ends of the two hanging pieces (221) away from the switching wheel frame (210) are formed with a diverging port (224) for the connecting hanging pin (310) and the adjusting piece (320) to enter.

10. A tower crane, characterized in that The pulley rope structure of the trolley and the hook comprises an arm frame (400), a trolley (100), a hook, and the trolley and the hook according to any one of claims 1-9, wherein the arm frame (400) comprises a dynamic arm mode and a flat arm mode.

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