WO2023184765A1

WO2023184765A1 - Crane

Info

Publication number: WO2023184765A1
Application number: PCT/CN2022/103123
Authority: WO
Inventors: 孙有辉; 刘文兵; 吕颖
Original assignee: 湖南三一中型起重机械有限公司
Priority date: 2022-03-31
Filing date: 2022-06-30
Publication date: 2023-10-05
Also published as: CN114715787A

Abstract

A crane, comprising a crane body and a posture-adjusting device which can be mounted on the crane body. The posture-adjusting device comprises: a winding drum assembly, which is wound with a steel wire rope, the steel wire rope being connected to a lifting object; and a driving assembly, which drives the winding drum assembly to rotate so as to wind/unwind the steel wire rope. The lifting object is pulled by means of the winding/unwinding of the steel wire rope, so as to achieve posture adjustment of the lifting object.

Description

crane

Technical field

The present disclosure relates to the technical field of cranes, and specifically to a crane that can adjust the posture of a suspended object through a single mechanical operation.

Background technique

The main function of the lifting machinery is to hoist the items (suspended objects) required for the operation to a certain height and to lift the items (suspended objects) to the target position through rotation, luffing and other actions. However, in some special scenarios, there are also high requirements for the posture of the hanging objects at a certain moment, such as the installation of wind turbine components, the stacking of containers, etc. For example, the current installation methods of wind turbine components are mainly: after the crane lifts the components, the installation is carried out by controlling the posture of the hoisted object through human traction; or: a large-tonnage crane is used as the main crane, and 1 to 2 small-tonnage cranes are used as auxiliary cranes. Control the posture of hanging objects and synchronize operations. For other operating scenarios that require attitude control of hanging objects, this is generally achieved through human traction or with the help of external traction devices/vehicles. In the above operation method, the posture of the hoisted object is controlled and adjusted by human traction, which requires the cooperation of multiple people, which requires additional labor costs and causes a waste of human resources; at the same time, this operation method also has great potential dangers. Falling objects may cause casualties; in addition, the posture control and adjustment of the hanging objects through auxiliary vehicles or devices requires high collaborative working capabilities of each operating vehicle and operator, and the cost is high.

Contents of the invention

In view of this, the present disclosure provides a crane.

The crane includes: a crane body; and an attitude adjustment device, which can be installed on the crane body. The posture adjustment device includes: a drum assembly, wound with a steel wire rope, the steel wire rope is connected to the hanging object; a driving assembly, driving the drum assembly to rotate to retract/releasing the steel wire rope, and retracting/releasing the steel wire rope by retracting/releasing the The wire rope pulls the hanging object to adjust the posture of the hanging object.

Optionally, in the above crane, the drum assembly includes: a first drum, wound with a first steel wire rope; a second drum, wound with a second steel wire rope; wherein the first drum and the second drum are The drum is arranged coaxially; the first steel wire rope is connected to one end of the hanging object, and the second steel wire rope is connected to the other end of the hanging object; the winding direction of the first steel wire rope is consistent with the winding direction of the second steel wire rope. The winding direction is opposite; the same driving assembly drives the first drum and/or the second drum to rotate.

Optionally, in the above crane, the drum assembly includes: a first drum wound with a first steel wire rope; a second drum wound with a second steel wire rope; wherein the first steel wire rope is connected to one end of the hanging object connection, the second steel wire rope is connected to the other end of the hanging object; the driving assembly includes: a first driving assembly, driving the first drum to rotate; a second driving assembly, driving the second drum to rotate ; To respectively complete the retraction/release of both ends of the hanging object.

Optionally, in the above crane, the drum assembly includes a drum wrapped with a steel wire rope, and both ends of the steel wire rope are respectively connected to both ends of the hanging object; the driving assembly drives the drum to rotate.

Optionally, in the above crane, the driving assembly includes: a driving motor including an output shaft; a driving shaft axially disposed in the first drum and the second drum; the driving shaft and the The output shaft is drivingly connected; a positioning member is provided on the drive shaft; or is provided in the first drum and the second drum; the positioning member connects the drive shaft to the drive shaft in different states. at least one of the first reel and the second reel.

Optionally, in the above crane, the attitude adjustment device further includes: a locking assembly; the locking assembly locks the first drum or the second drum that is not drivingly connected to the driving assembly. .

Optionally, in the above crane, the driving component further includes: a selection component; the selection component drives the drive shaft to translate axially; the selection component includes: a servo motor, and the output shaft of the servo motor is coaxial. A worm is connected; a gear is installed in mesh with the worm; a rack is installed in mesh with the gear; the rack is fixedly connected with the drive shaft to realize the axial translation of the drive shaft driven by the selection component.

Optionally, in the above crane, the attitude adjustment device further includes: a locking component; the locking component includes: a first stopper, which is provided at the end of the first drum away from the second drum. part; a second stopper is provided at the end of the second drum away from the first drum; the first stopper and the second stopper follow the axis of the drive shaft Adjust the position in translation to realize that when the positioning member positions the first drum alone, the first stopper unlocks the first drum and the second stopper locks the third drum. Two reels; when the positioning member positions the first reel and the second reel simultaneously, the first stopper unlocks the first reel, and the second stopper unlocks the first reel. The second reel; when the positioning member positions the second reel alone, the first stopper locks the first reel, and the second stopper unlocks the second reel. cylinder.

Optionally, in the above crane, the attitude adjustment device further includes: a first mounting plate, located at the end of the first drum away from the second drum; a second mounting plate, located at the end of the first drum away from the second drum; The end of the second drum away from the first drum; the first mounting plate and the second mounting plate arrange the attitude adjustment device on the crane body.

Optionally, the above-mentioned crane includes: a guide wheel, which is provided on the lifting arm of the crane body; the first steel wire rope and the second steel wire rope respectively bypass the guide wheel and are connected to the hanging object.

The crane provided by the present disclosure is provided with a crane body, and an attitude adjustment device is installed on the crane body. The driving assembly drives the drum assembly to rotate to retract/unleash the wire rope, and pulls the hanging object by retracting/releasing the wire rope, so that the crane can be adjusted. Adjustment of the posture of the hoisted object enables a crane to adjust the posture of the hoisted object alone; during the above operation, there is no need to rely on human traction and no need for multiple people to cooperate with the operation. This not only reduces additional labor costs, but also eliminates the need for It causes a waste of human resources and at the same time enhances the safety performance of the operation. When the hanging object falls, the possibility of casualties to the operator is avoided; in addition, during the operation process of the present disclosure, there is no need to auxiliary vehicles or devices to control the attitude and posture of the hanging object. Adjustment eliminates the need for higher requirements on the collaborative working capabilities of each operating vehicle and operator, further reducing operating costs.

Brief description of the drawings

In order to explain the embodiments of the present disclosure or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are only This is an embodiment of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on the provided drawings without exerting creative efforts.

Figure 1 is a schematic isometric view of an attitude adjustment device of a crane according to an embodiment of the present disclosure.

FIG. 2 is a schematic cross-sectional view of the attitude adjustment device shown in FIG. 1 .

FIG. 3 is a schematic plan view of the attitude adjustment device shown in FIG. 1 .

In Figures 1-3:

1-First reel, 2-Second reel, 3-Output shaft, 4-Drive shaft, 5-Select assembly, 6-First stopper, 7-Second stopper; 8-First installation Board, 9-second mounting plate, 10-first side sealing plate, 11-second side sealing plate;

51-servo motor, 52-gear, 53-rack, 54-fixed bracket, 61-push plate, 62-lock pin, 63-locking plate, 64-locking rod, 65-spring.

Detailed ways

The present disclosure provides a crane.

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only some of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of this disclosure.

As shown in Figures 1-3, the present disclosure provides a crane, which includes a crane body and an attitude adjustment device. The posture adjustment device may be a stand-alone device. According to customer needs, when the attitude of the hanging object needs to be adjusted, the attitude adjustment device is fixedly installed on the crane body; when the attitude adjustment of the hanging object is completed, the attitude adjustment device can be removed. The attitude adjustment device and the crane auxiliary winch can be universally designed, so that they can be installed with the help of the installation interface of the mobile auxiliary winch, making assembly easy and fast. Or, when the attitude adjustment device does not affect other operating conditions of the crane, the attitude adjustment device can be set as the internal structure of the crane and always installed on the crane body.

It should be understood that the installation location and interface of the attitude adjustment device include but are not limited to the auxiliary winch of the crane and the arm ends of each boom section of the boom.

The present disclosure uses a combination of a crane body and an attitude adjustment device. Only through the cooperation of the attitude adjustment device and the crane body, the attitude adjustment of the hanging object can be realized, thereby realizing that one crane can independently adjust the attitude of the hanging object. During the above operation, there is no need to rely on human traction and no need for multiple people to cooperate with the operation. This not only reduces additional labor costs, but also does not waste human resources. At the same time, it enhances the safety performance of the operation. When the hanging object falls, it avoids damage to the machine. Possibility of operator injury or death. In addition, during the operation process of the present disclosure, there is no need for auxiliary vehicles or devices to control and adjust the attitude of the hanging objects, and there is no need to place high requirements on the collaborative working capabilities of each operation vehicle and operator, further reducing operation costs.

Further, the attitude adjustment device includes: a drum assembly and a driving assembly. The drum assembly is wrapped with a steel wire rope, and the steel wire rope is connected to the hanging object. The drive assembly drives the drum assembly to rotate.

When the crane adjusts the attitude of the hoisted object, the wire rope hangs the hoisted object at the arm end of the main boom section of the boom. The steel wire rope wound on the drum assembly is connected to the hanging object, so that the hanging object has different force-bearing connection points at different positions. Then, the driving assembly drives the drum assembly to rotate, and the wire rope is retracted/unrolled along with the forward/reverse rotation of the drum assembly. With the retraction/releasing degree of the wire rope at different stress-bearing connection points, the lifting/pull-down operation of different stress-bearing connection points of the hanging objects is realized. The lifting/pull-down degree of each force-bearing point of the hanging object can be precisely controlled, thereby maintaining the posture of the hanging object under the required operating conditions. The above-mentioned device is simple, easy to produce and install, and the adjustment of the posture of the hanging object is more flexible and accurate. It does not require auxiliary manpower or multiple equipment to work together. The adjustment of the posture of the hanging object can be achieved by using only one crane.

It should be noted that, in addition to the structure of driving the drum assembly to rotate through the driving assembly, the retracting/unwinding of the steel wire rope can also be arranged in other structures. For example, by connecting the end of different wire ropes away from the hanging object to the rack transmission mechanism, the linear reciprocating motion of the rack transmission mechanism can realize the lifting/pull-down operation of different steel wire ropes on different stress points of the hanging object, thereby realizing Keep the hoisted object in the required working condition.

First specific embodiment

In this embodiment, the attitude adjustment device includes: a drum assembly and a driving assembly. The drum assembly includes a first drum 1 and a second drum 2 arranged coaxially and side by side. A first steel wire rope is wound around the first drum 1. The first steel wire rope has a free end, and the free end of the first steel wire rope is connected to one end of the hanging object. A second steel wire rope is wound around the second drum 2. The second steel wire rope has a free end, and the free end of the second steel wire rope is connected to the other end of the hanging object. The rotation directions of the first steel wire rope and the second steel wire rope are opposite. The driving component drives the first reel 1 to rotate, or the driving component 2 drives the second reel to rotate, or the same driving component drives the first reel 1 and the second reel 2 to rotate synchronously.

When the crane adjusts the posture of the hanging object, the first steel wire rope and the second steel wire rope of the drum assembly are connected to both ends of the hanging object respectively, so that the hanging object has a first force-bearing connection point and a second force-bearing connection point at two positions. The hanging object is hung from the arm end of the main boom section. Since the first steel wire rope and the second steel wire rope are wound in opposite directions, when the same driving component drives the first drum 1 and the second drum 2 synchronously, the first steel wire rope can be retracted while the second steel wire rope is released, thereby simultaneously realizing the hoisting operation. The first force-bearing connection point of the hanging object is lifted up, and the second force-bearing connection point is pulled down; or when the first steel wire rope is released, the second steel wire rope is retracted, thereby simultaneously realizing the first force-bearing connection point of the hanging object being pulled down, and the second force-bearing connection point is pulled down. Point lifting, and then through the reverse lifting and pulling movements of the hanging object at the two force-bearing connection points, the synchronous adjustment of the posture of the hanging object is realized.

When it is necessary to adjust the length of the first wire rope or to pre-tighten the first wire rope, the driving motor alone drives the first drum to rotate. When it is necessary to adjust the length of the second wire rope or to pre-tighten the second wire rope, the drive motor drives the second drum to rotate alone.

The present disclosure innovatively winds the first steel wire rope and the second steel wire rope on the first drum 1 and the second drum 2 in opposite directions, thereby achieving the completion of the third drum 1 and the second drum 2 under the synchronous driving of a driving assembly. The first drum 1 and the second drum 2 rotate synchronously, thereby realizing the reverse retracting and unwinding of the first steel wire rope and the second steel wire rope, completing the reverse pulling of the hanging object at the two stressed connection points, and realizing the lifting of the hanging object. Posture adjustment. The above-mentioned structure is simple and the design is ingenious. The attitude adjustment device can drive the two drums through only one driving component, and the driving component can also independently apply a rotational driving force to one of the drums, thus realizing the adjustment of the length of a single wire rope. Adjustment or pre-tensioning, its structure is very compact, its layout is simple, it is convenient for production, installation and use, and the adjustment of the working state is flexible and reliable.

In some embodiments of the present disclosure, the driving assembly includes: a driving motor, a driving shaft 4 and a positioning member. The drive motor includes an output shaft 3 . The output shaft 3 is transmission connected with the drive shaft 4 so that the drive motor drives the drive shaft 4 to rotate synchronously. The drive shaft 4 is axially arranged in the center of the first drum 1 and the second drum 2. The positioning member is arranged on the drive shaft 4. The first drum 1 and the second drum 2 are provided with snap-in structures adapted to the positioning parts. Through the axial translation of the drive shaft 4, the positioning part can be driven to change positions in the first drum 1 and the second drum 2, and then the positioning part can be matched in the snap-in structure of the corresponding drum, thereby realizing the positioning part The driving shaft 4 is connected to the first drum 1 in different positions, or the driving shaft 4 is connected to the first drum 1 and the second drum 2 synchronously, or the driving shaft 4 is connected to the second drum 2.

In some embodiments of the present disclosure, the positioning members are respectively provided in the first drum 1 and the second drum 2. The driving shaft 4 is provided with a snap-in structure adapted to the positioning member. Through the axial translation of the drive shaft 4, the clamping structure can be driven to change positions in the first drum 1 and the second drum 2, and then the clamping structure can be matched with the positioning piece of the corresponding drum, thereby achieving positioning. The components connect the drive shaft 4 to the first drum 1 in different states, or the drive shaft 4 is connected to the first drum 1 and the second drum 2 synchronously, or the drive shaft 4 is connected to the second drum 2.

Preferably, the positioning member is a circumferential synchronous connecting member, and the circumferential synchronous connecting member is a spline.

Preferably, splines are provided on the drive shaft 4 . The axial centers of the first drum 1 and the second drum 2 are provided with keyway structures adapted to the splines. The drive shaft 4 can be driven by the selection component 5 to translate axially, thereby driving the spline to translate axially in the keyway, realizing the axial change of position of the spline in the keyway, and thus realizing: the spline is located on the first drum 1 Inside, the drive shaft 4 is positioned separately with the first drum 1, and the drive motor drives the first drum 1 to rotate alone; or, half of the spline is located in the first drum, and the other half of the spline is located in the second drum, and the drive shaft 4 is positioned synchronously with the first drum 1 and the second drum 2, and the output shaft 3 drives the first drum 1 and the second drum 2 to rotate synchronously; or, the spline is located in the second drum 2, and the drive shaft 4 is independent Positioned with the second drum 2, the drive motor drives the second drum 2 to rotate independently.

Further, the radial size of the splines is larger than the radial size of the drive shaft 4 , and the axial length of the splines is smaller than the axial lengths of the first drum 1 and the second drum 2 .

Take the first reel 1 located on the right side of the second reel 2 as an example. The drive shaft has a total of 3 positions on the axis: right, middle and left, which are used to position the first drum 1, synchronously position the first drum 1 and the second drum 2, and position the second drum 2 respectively. The drive assembly set up above has a simple structure and can quickly and conveniently realize the transformation of different reel positioning states. In particular, the structure of synchronously connecting different drums in the circumferential direction through splines is very simple, which facilitates production and installation and saves processing and manufacturing costs.

It should be noted that, in addition to the above-mentioned structure, the driving assembly may also be provided with other structures. For example, in some embodiments, the driving assembly may include: a driving motor, a driving shaft and a positioning member. The drive motor includes an output shaft. The positioning part includes a first positioning part and a second positioning part. The first positioning member is a first lock pin, and the second positioning member is a second lock pin. A first pin hole is provided on the inner wall of the first drum 1, a second pin hole is provided on the inner wall of the second drum 2, a first electromagnetic induction component is arranged in the first pin hole, and a second pin hole is arranged in the second pin hole. Electromagnetic induction parts. The first lock pin and the second lock pin are telescopically arranged on the drive shaft 4 respectively, and both the first lock pin and the second lock pin are electromagnetic induction components. The first lock pin is opposite to the first pin hole, and the second lock pin is opposite to the second pin hole.

When the first reel 1 is required to work, the electromagnetic induction component and the first lock pin in the first pin hole are charged, thereby locking the first lock pin in the first pin hole, and the drive shaft 4 is independently connected to the first pin hole. The drum 1 is positioned, and the drive motor drives the first drum 1 to rotate alone. When the first reel 1 and the second reel 2 need to work synchronously, the electromagnetic induction components in the first pin hole and the second pin hole, as well as the first lock pin and the second lock pin are charged at the same time, thereby synchronously The first locking pin is locked in the first pin hole, and the second locking pin is locked in the second pin hole; the driving shaft 4 is positioned synchronously with the first reel 1 and the second reel 2, and the driving motor drives the third The first drum 1 and the second drum 2 rotate synchronously. When the second drum 2 is required to work, the electromagnetic induction component and the second lock pin in the second pin hole are charged, thereby locking the second lock pin in the second pin hole, and the drive shaft 4 is connected to the second pin hole alone. The drum 2 is positioned, and the drive motor drives the second drum 2 to rotate independently.

In some embodiments of the present disclosure, the attitude adjustment device further includes: a locking component. The locking assembly locks the first drum 1 or the second drum 2 that is not drivingly connected to the driving assembly.

Specifically, the locking assembly includes: a first stopper 6 and a second stopper 7 . The first stopper 6 is provided at the end of the first drum 1 away from the second drum 2 . The second stopper 7 is provided at the end of the second drum 2 away from the first drum 1 . The first stopper 6 and the second stopper 7 adjust their positions along with the axial translation of the drive shaft 4, so as to realize that when the splines position the first drum 1 individually, the first stopper 6 unlocks the first drum 1. Drum 1, the second stopper 7 locks the second drum 2 (at this time, the drive motor alone drives the first drum 1 to rotate, the second drum is in a locked state, and the locked second drum 2 does not will rotate uncontrollably due to the self-weight of the extended second wire rope); when the splines position the first drum 1 and the second drum 2 synchronously, the first stopper 6 unlocks the first drum 1, and the first drum 1 is unlocked by the spline. The two stoppers 7 unlock the second drum 2 (at this time, the drive motor synchronously drives the first drum 1 and the second drum 2 to rotate flexibly); when the spline positions the second drum 2 independently, the first stopper 7 6 locks the first reel 1, and the second stopper 7 unlocks the second reel 2 (at this time, the drive motor drives the second reel 2 to rotate alone, the first reel is in a locked state, and the locked first reel Drum 1 will not rotate uncontrollably due to the weight of the extended first wire rope).

The first stopper 6 and the second stopper 7 can realize the coupling and decoupling of the motion of the two drums, ensuring that the two drums of the attitude adjustment device will only rotate when they are in the required working state. It reduces the displacement error of the wire rope and ensures flexible and precise adjustment of the posture of the hanging object.

In some embodiments of the present disclosure, the posture adjustment device further includes a selection component 5 . The selection component 5 includes: a servo motor 51 , a gear 52 , a rack 53 and a fixed bracket 54 . A worm is coaxially connected to the output shaft of the servo motor 51 , and the servo motor 51 is fixed at the end of the first drum 1 away from the second drum 2 . The fixed bracket 54 includes an L-shaped bracket and a horizontal U-shaped plate. The horizontal plate of the L-shaped bracket is installed on the outer wall of the servo motor 51. The vertical plate of the L-shaped bracket is provided with limited mounting holes. The horizontal U-shaped plate is fixedly connected to the L-shaped bracket, and the horizontal central axis of the horizontal U-shaped plate is parallel to the output shaft of the servo motor 51 . The gear 52 is rotatably connected in the horizontal U-shaped plate, and the gear 52 is installed in engagement with the worm. One end of the rack 53 is fixedly connected to the end of the drive shaft 4, and the other end passes through the limiting installation hole and is engaged with the gear 52 for installation.

The output shaft of the servo motor 51 rotates, driving the worm to rotate synchronously. The rotation of the worm drives the gear 52 to rotate synchronously, and the rotation of the gear 52 drives the rack 53 to reciprocate linearly along the axial direction of the drive shaft 4. The linear reciprocating movement of the rack 53 drives the axial linear reciprocating movement of the drive shaft 4, thus realizing the spline pairing. Positioning of the first drum 1 and/or the second drum 2 .

The linear reciprocating motion of the drive shaft 4 is realized by forward/reverse rotation of the servo motor 51 .

The selected components of the above structure have a simple and compact structure, which is convenient for production and installation. In addition, the meshing transmission of the gear and the rack drives the axial translation movement of the drive shaft 4 to be more stable and reliable.

It should be noted that, in addition to the above-mentioned structure, the selection component may also be provided with other structures. For example, in some embodiments, the selection component may include a support frame and a telescopic cylinder. The support frame is provided at the end of the first drum 1 away from the second drum 2 . The telescopic oil cylinder is arranged on the support frame, and the central axis of the telescopic oil cylinder telescopic rod is coaxial with the drive shaft 4. The movement of the telescopic rod of the telescopic oil cylinder drives the drive shaft 4 to reciprocate in an axial direction, thereby realizing the spline positioning of the first drum 1 and/or the second drum 2.

In some embodiments of the present disclosure, the first stopper 6 and the second stopper 7 have the same structure. The first stopper 6 includes: a push plate 61 , a locking pin 62 , a locking plate 63 , a locking rod 64 and a spring 65 . The push plate 61 is fixedly connected to the drive shaft 4 . Further, the push plate is a drive shaft end cover, and the drive shaft end cover is provided at the end of the drive shaft 4 . The lock pin 62 is movable and sleeved on the drive shaft 4. Further, the lock pin 62 is a spline lock pin. The locking plate 63 is fixedly connected to the locking pin 62. The locking plate 63 has an extension part extending radially, and a limiting hole is provided in the extension part. One end of the locking rod 64 is fixedly connected to the end of the first drum 1 away from the second drum 2, and the other end can be inserted into the limiting hole to limit the position. The spring 65 is sleeved on the locking rod 64 . One end of the spring 65 is fixedly connected to the end of the first drum 1 , and the other end can be compressed by the locking plate 63 .

In the following, it is assumed that the first drum 1 is located on the right side of the second drum 2 as an example.

When the first drum 1 and the second drum 2 are spline-positioned, the locking pin 62 of the first stopper 6 is located outside the first drum 1, while the locking pin 62 of the second stopper 7 is located on the second drum. 2 exterior.

When the spline moves to position the second drum 2, driven by the servo motor 51, the rack 53 moves to the left. Driven by the rack 53, the drive shaft 4 drives the spline to move to the left. At the same time, the drive shaft 4 moves to the left to drive the drive shaft end cover to move left synchronously until the drive shaft end cover contacts the locking plate 63. The drive shaft 4 continues to move to the left, and the locking plate 63 drives the spline lock pin to gradually enter the first drum under the push of the end cover of the drive shaft. At this time, the locking rod 64 enters the limiting hole of the locking plate 63. Under the limiting action of the locking rod 64 and the locking plate 63, the spline lock pin cannot rotate in the circumferential direction, and the locking plate 63 will Compression spring 65. The drive shaft 4 continues to move to the left until the spline is completely separated from the first drum 1 and completely enters the keyway of the second drum 2. At this time, the spline lock pin has completely entered the keyway of the first drum 1, completing the positioning of the drive shaft 4 to the second drum 2, and the circumferential locking of the first drum 1 by the spline lock pin. In this state The lower drive motor alone drives the second drum 2 to rotate, while the first drum 1 cannot rotate.

When the spline moves to position the first drum 1, driven by the servo motor 51, the rack 53 moves to the right. Driven by the rack 53, the drive shaft 4 drives the spline to move to the right. At the same time, the drive shaft 4 moves to the right. The drive shaft end cover moves to the right simultaneously. The drive shaft end cover and the locking plate 63 gradually come out of contact. The locking rod 64 gradually breaks away from the limiting hole of the locking plate 63 , and at the same time, the locking plate 63 gradually breaks away from the compression spring 65 . The drive shaft 4 continues to move to the right until the spline breaks away from the second drum 2 and completely enters the keyway of the first drum 1. At this time, the spline lock pin is completely separated from the first drum 1 under the elastic action of the spring 65, thereby completing the positioning of the drive shaft 4 to the first drum 2, and the positioning of the spline lock pin to the first drum 1. Unlocked, in this state the drive motor alone drives the first drum 1 to rotate freely.

The above-mentioned first stopper 6 and second stopper 7 have a simple structure, which is convenient for production and installation, and can be driven by the servo motor 51 to realize the positioning of different reels by the splined drive shaft 4 at the same time. The locking of the other drum ensures the accurate and reliable operation of the attitude adjustment device under different working conditions.

It should be noted that, in addition to the above-mentioned structures, the first stopper and the second stopper may also be provided with other structures. For example, in some embodiments, the movement of the above-mentioned stopper no longer relies on the axial movement of the drive shaft 4 to change the working state, but two sets of independently working electric locking structures are provided. For example, the first stopper is a first stopper rack, and a first toothed disc is provided in the circumferential direction of the first drum. By driving the first stopper rack to approach or move away from the first toothed disc, the first stopper rack is realized. Locking or unlocking of the drum; the second stopper is a second stopper rack, and a second toothed disc is provided in the circumferential direction of the second drum, and the second stopper rack is driven close to or away from the second toothed disc. , realizing the locking or unlocking of the second drum.

In some embodiments of the present disclosure, the attitude adjustment device may further include: a first mounting plate 8 and a second mounting plate 9 . The first mounting plate 8 is provided at the end of the first drum 1 away from the second drum 2 . The second mounting plate 9 is provided at the end of the second drum 2 away from the first drum 1 . The first mounting plate 8 and the second mounting plate 9 arrange the attitude adjustment device on the crane body. The structure of the mounting plate is simple, enabling quick disassembly and assembly of the attitude adjustment device on the crane body.

It should be noted that the first mounting plate 8 and the second mounting plate 9 are respectively provided with through holes to provide movement space for the axial reciprocating linear motion of the selection component 5 and the locking component.

Further, the first side sealing plate 10 is covered on the outside of the first mounting plate 8 . The first side sealing plate 10 has an opening, and the shape of the opening is adapted to the shape of the spline lock pin. The outer side of the second mounting plate 9 is covered with a second side sealing plate 11. The second side sealing plate 11 has an opening, and the shape of the opening is adapted to the shape of the spline lock pin. By providing the first side sealing plate 10 and the second side sealing plate 11, the sealing performance of the internal space of the attitude adjustment device can be ensured, and external debris can be prevented from entering the keyway inside the drum and affecting the splines on the drive shaft 4 and the first roll. The matching accuracy of the key grooves of drum 1 and second drum 2 protects the internal structure and greatly extends the service life of the equipment.

In some embodiments of the present disclosure, the output shaft 3 and the drive shaft 4 are in an axis spline translation fit. The output shaft 3 is provided with output shaft splines, and the drive shaft 4 is provided with a spline groove adapted to the output shaft splines. The above arrangement has a simple structure, is convenient for production and installation, and ensures that during the axial reciprocating linear motion of the drive shaft 4, the drive shaft 4 always splines with the output shaft 3, ensuring that the drive shaft 4 and the output shaft 3 have axial freedom. degree, but remains locked circumferentially.

In some embodiments of the present disclosure, the crane includes a plurality of guide wheels, and the plurality of guide wheels are respectively disposed on the arm body and arm end of the boom of the crane body. The first steel wire rope and the second steel wire rope respectively go around the guide wheel and are connected to the hanging object.

Here, the height-adapted main boom section is selected according to the height at which the suspended object is adjusted, and the traction of the first and second steel wire ropes is controlled and changed through the guide wheels installed on the body and end of the main boom section. direction to adjust the posture of the hanging object.

The hanging object attitude control method includes the following steps:

S1: Fix the attitude adjustment device and the crane body;

S2: Wind the first steel wire rope on the first drum 1, and wind the second steel wire rope on the second drum 2; wherein, the winding directions of the first steel wire rope and the second steel wire rope are opposite;

S3: Select the main boom section corresponding to the height according to the height of the hanging object when adjusting the posture, and set multiple guide wheels on the arm body or arm end of the main boom section;

S4: Pass the free end of the first wire rope around the guide wheel and connect it to one end of the hanging object; pass the free end of the second wire rope through the guide wheel and connect it to the other end of the hanging object;

S5: The first drum 1 and the second drum 2 are synchronously driven by the driving assembly to reversely rotate the first steel wire rope and the second steel wire rope. The reverse rotation of the first steel wire rope and the second steel wire rope completes the reverse rotation of both ends of the hanging object. Stretching to complete the posture adjustment of the hanging object.

When adjusting the posture of the hanging object, the spline on the drive shaft 4 is located at the center of the first drum 1 and the second drum 2. At this time, half of the splines on the drive shaft are connected and positioned with the first drum 1, and the other half are connected and positioned with the second drum 2. The left end of the drive shaft 4 is connected to the output shaft 3 of the drive motor through splines (can move relative to each other in the axial direction). At this time, the first drum 1 and the second drum 2 can be driven to rotate synchronously and in the same direction (motion coupling) through the power input of the drive motor. Since the winding directions of the wire ropes on the first drum 1 and the second drum 2 are opposite, Therefore, the synchronous reverse retracting/releasing action of the two traction wire ropes can be realized, thereby controlling the posture of the hanging object.

When adjusting the length of the second steel wire rope or pre-tightening the second steel wire rope, taking the adjustment of the second steel wire rope length as an example (the same applies when adjusting the first steel wire rope), the servo motor 51 realizes the change and deceleration of the rotation direction through the worm and gear 52, and then by The gear 52 drives the rack 53 to achieve axial translation (movement to the left), and then with the help of the push plate 61 on the right end of the drive shaft 4 installed with splines, the translation action is transmitted to the drive shaft 4, causing the drive shaft 4 to move to the left. move. During this process, the spline part on the drive shaft 4 will be connected to the keyway of the first drum 1 and the second drum 2 from half on both sides, and gradually move to the left until it is separated from the first drum 1 and completely enters the second drum. The state of drum 2 enables the drive motor to independently drive the second drum 2 to adjust the length of the second wire rope. During this process, when the right part of the spline on the drive shaft 4 has not yet separated from the first drum 1, as the drive shaft 4 moves to the left, the push plate 61 installed on its right end moves to the right synchronously. And contacts the push plate 61, and forces the push plate 61 to move to the left along the locking rod 64 and the drive shaft 4, and then drives the lock pin 62 bolted to it to move to the left until it is gradually inserted into the keyway of the first drum 1, Thereby, the first reel 1 is locked. Until the spline part of the drive shaft 4 is completely separated from the first drum 1 and completely enters the second drum 2, at this time, the locking pin 62 has been fully inserted into the first drum 1 to lock it. At this point, the mechanism has realized the decoupling of the movements of the first reel 1 and the second reel 2. The drive motor can now drive the second reel 2 independently, and the locked first reel 1 will not be caused by stretching out. The first wire rope rotates uncontrollably due to its own weight.

Second specific embodiment

In this embodiment, the attitude adjustment device may include a drum assembly and a driving assembly. The reel assembly may include independently provided first and second reels. The driving assembly may include a first driving assembly and a second driving assembly that are independently provided. A first steel wire rope is wound around the first drum. The first steel wire rope has a free end. The free end of the first steel wire rope is connected to one end of the hanging object. A second steel wire rope is wound around the second drum. The second steel wire rope has a free end. The free end of the second steel wire rope is connected to the other end of the hanging object. The first driving component independently drives the first reel to rotate, and the second driving component independently drives the second reel to rotate.

When the crane adjusts the posture of the hanging object, the first steel wire rope and the second steel wire rope of the drum assembly are connected to both ends of the hanging object, so that the hanging object has a first force-bearing connection point and a second force-bearing connection point at two positions respectively. . The hanging object is hung from the arm end of the main boom section. The first driving component and the second driving component work independently. The first driving component drives the first drum to rotate to drive the retracting and unwinding action of the steel wire, which is opposite to the second driving component driving the second drum to rotate and drive the retracting and unwinding action of the steel wire rope, thereby achieving While the first force-bearing connection point of the hanging object is pulled up/down, the second force-bearing connection point is pulled down/lifted up, thereby achieving the reverse pulling of the hanging object and adjusting the posture of the hanging object.

Here, both the first driving component and the second driving component adopt driving motors.

By arranging two drive components, the rotation of the first drum and the second drum is driven independently. The work between the two drive components does not affect each other, the power response is rapid, and the individual work will not be interfered with.

Third specific embodiment

In this embodiment, the attitude adjustment device may include a drum assembly and a driving assembly. The drum assembly can be a separate drum, and the driving assembly can be an independent driving motor. The wire rope is wound on the drum and has a first free end and a second free end. The two free ends of the wire rope are connected to both ends of the hanging object. The drive motor is used to drive the drum to rotate.

When the crane adjusts the posture of the hanging object, the two free ends of the steel wire rope are connected to the two ends of the hanging object respectively, so that the hanging object has a first force-bearing connection point and a second force-bearing connection point at two positions respectively. The hanging object is suspended on the main The end of the arm section. When the drive motor drives the drum to rotate, the first free end and the second free end of the wire rope must be retracted and released in opposite directions, thereby realizing the lifting/pull-down of the first force-bearing connection point of the hanging object and the second force-bearing connection point at the same time. Pull down/lift up, thereby realizing the reverse pulling of the hanging object and adjusting the posture of the hanging object.

As a possible implementation, the drum can also be replaced by a pulley.

Using only one drum or pulley simplifies the structural composition of the device. This solution is lighter and can be preferably directly installed on the arm end of the main boom section of the corresponding height, eliminating the need for a guide pulley and shortening the length of the required wire rope.

The components and devices involved in this disclosure are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the drawings. As those skilled in the art will recognize, these components and devices may be connected, arranged, and configured in any manner. Words such as "includes," "includes," "having," etc. are open-ended terms that mean "including, but not limited to," and may be used interchangeably therewith. As used herein, the words "or" and "and" refer to the words "and/or" and are used interchangeably therewith unless the context clearly dictates otherwise. As used herein, the word "such as" refers to the phrase "such as, but not limited to," and may be used interchangeably therewith.

It should also be noted that in the device of the present disclosure, each component can be disassembled and/or reassembled. These decompositions and/or recombinations should be considered equivalent versions of the present disclosure.

The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the disclosure. Therefore, the present disclosure is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The foregoing description has been presented for the purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of the present disclosure to the form disclosed herein. Although various example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

The above are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalent substitutions, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure. .

Claims

A crane is characterized by including:

Crane body;

An attitude adjustment device can be installed on the crane body; the attitude adjustment device includes:

The drum assembly is wound with a steel wire rope, and the steel wire rope is connected to the hanging object;

The driving assembly drives the drum assembly to rotate to retract/unleash the steel wire rope, and pulls the hanging object by retracting/releasing the steel wire rope to adjust the posture of the hanging object.
The crane according to claim 1, characterized in that:

The drum assembly includes: a first drum, wound with a first steel wire rope; a second drum, wound with a second steel wire rope; wherein the first drum and the second drum are coaxially arranged; The first steel wire rope is connected to one end of the hanging object, and the second steel wire rope is connected to the other end of the hanging object; the winding direction of the first steel wire rope is opposite to the winding direction of the second steel wire rope;

The same drive assembly drives the first drum and/or the second drum to rotate.
The crane according to claim 2, wherein the drive assembly includes:

Drive motor, including output shaft;

A drive shaft is axially disposed in the first drum and the second drum; the drive shaft is drivingly connected to the output shaft;

A positioning member is provided on the drive shaft; or is provided in the first drum and the second drum; the positioning member connects the drive shaft to the first drum in different states. and at least one of said second reels.
The crane according to claim 3, wherein the driving component further includes: a selection component; the selection component drives the drive shaft to translate axially; the selection component includes:

Servo motor, a worm is coaxially connected to the output shaft of the servo motor;

Gear, installed in mesh with the worm;

The rack is installed in mesh with the gear; the rack is fixedly connected to the drive shaft to realize the axial translation of the drive shaft driven by the selection component.
The crane according to any one of claims 2 to 4, characterized in that the attitude adjustment device further includes: a locking component; the locking component connects the first part of the crane that is not drivingly connected to the driving component. The drum or the second drum is locked.
The crane according to claim 5, wherein the locking assembly includes:

A first stopper is provided at the end of the first reel away from the second reel;

A second stopper is provided at the end of the second drum away from the first drum;

The first stopper and the second stopper adjust their positions along with the axial translation of the drive shaft to achieve:

When the positioning member positions the first reel alone, the first stopper unlocks the first reel, and the second stopper locks the second reel;

When the positioning member positions the first reel and the second reel synchronously, the first stopper unlocks the first reel, and the second stopper unlocks the second reel. cylinder;

When the positioning piece positions the second drum alone, the first stopper locks the first drum and the second stopper unlocks the second drum.
The crane according to any one of claims 2 to 6, characterized in that the attitude adjustment device further includes:

A first mounting plate is provided at the end of the first drum away from the second drum;

A second mounting plate is provided at the end of the second drum away from the first drum;

The first mounting plate and the second mounting plate arrange the attitude adjustment device on the crane body.
The crane according to any one of claims 2 to 7, characterized in that it includes:

A guide wheel is provided on the lifting arm of the crane body;

The first steel wire rope and the second steel wire rope respectively bypass the guide wheel and are connected to the hanging object.
The crane according to claim 1, characterized in that:

The drum assembly includes: a first drum around which a first steel wire rope is wound; a second drum around which a second steel wire rope is wound; wherein the first steel wire rope is connected to one end of the hanging object, and the second steel wire rope is connected to The other end of the hanging object is connected;

The driving assembly includes: a first driving assembly that drives the first drum to rotate; a second driving assembly that drives the second drum to rotate; so as to respectively complete the retracting/releasing of the two ends of the hanging object.
The crane according to claim 1, characterized in that:

The drum assembly includes a drum, which is wound with a steel wire rope, and the two ends of the steel wire rope are respectively connected to the two ends of the hanging object;

The drive assembly drives the drum to rotate.