阅读说明：本技术 超起装置、起重机及其控制方法 (Super-lift device, crane and control method thereof ) 是由 石丽君 王玉宝 贾壮军 于 2020-06-17 设计创作，主要内容包括：本申请涉及工程机械技术领域,具体而言,涉及一种超起装置、起重机及其控制方法,包括桅杆和牵引绳导向件,以及安装在所述桅杆上的卷扬机和直线驱动件；所述牵引绳导向件安装于所述直线驱动件,以通过所述直线驱动件带动所述牵引绳导向件沿第一方向向远离所述卷扬机的方向运动；所述第一方向为所述桅杆的长度方向。本申请的目的在于针对目前起重臂起吊重物时,牵引绳往往难以处于紧绷状态,进而难以通过牵引绳和超起桅杆很好的分担起重臂的弯矩的问题,提供一种超起装置、起重机及其控制方法。(The application relates to the technical field of engineering machinery, in particular to a super-lift device, a crane and a control method thereof, wherein the super-lift device comprises a mast, a traction rope guide piece, a winch and a linear driving piece, wherein the winch and the linear driving piece are installed on the mast; the traction rope guide piece is arranged on the linear driving piece so as to drive the traction rope guide piece to move along a first direction to a direction far away from the winch through the linear driving piece; the first direction is a length direction of the mast. The application aims to solve the problems that when a heavy object is lifted by a crane boom at present, a traction rope is often difficult to be in a tight state, and the bending moment of the crane boom is difficult to be shared well through the traction rope and a super-lifting mast, and provides a super-lifting device, a crane and a control method of the super-lifting device.)

1. The super lifting device is characterized by comprising a mast, a traction rope guide, a winch and a linear driving piece, wherein the winch and the linear driving piece are installed on the mast;

the linear driving piece is provided with the traction rope guide piece so as to drive the traction rope guide piece to move along a first direction to a direction far away from the winch through the linear driving piece;

the first direction is a length direction of the mast.

2. The superlift apparatus of claim 1, wherein the linear drive is positioned between the pull-line guide and the hoist in the first direction; one end of the mast in the first direction is a first mounting end, the first mounting end is used for connecting a crane boom, and the winch is located between the first mounting end and the linear driving piece.

3. The super lift device of claim 1, wherein a slide slot extending in a first direction is provided on said mast, said pull cord guide slidably engaging said slide slot.

4. The super lift device of claim 3, wherein said runner is a kidney-shaped bore extending in a first direction, said pull-cord guide comprises interconnected pulleys and an axle, an end of said axle extends into said kidney-shaped bore, and said axle is in sliding engagement with said kidney-shaped bore.

5. The super lift apparatus of claim 3, wherein said mast comprises two stops having guide surfaces, said stops being aligned in a second direction, said guide surfaces of said two stops being disposed opposite each other to form said slide slot therebetween, said second direction being perpendicular to said first direction, said second direction being in the same plane as said first direction; the traction rope guide is provided with a sliding block, the sliding block is positioned between the two guide surfaces, and the sliding block is in sliding fit with the two guide surfaces.

6. The superlift device of claim 3, wherein the pull-cord guide is in surface contact with the chute in a second direction, the second direction being perpendicular to the first direction, and the second direction being in the same plane as the first direction.

7. The superlift apparatus of any one of claims 1 to 6, further comprising a hoist lock assembly, the hoist having a ratchet, the hoist lock assembly being adapted to cooperate with the ratchet to lock the hoist.

8. The superlift device of claim 7, wherein the winch locking assembly comprises a locking cylinder and a locking pin, one end of the locking pin is hinged to the mast, the other end of the locking pin is a mating end for mating with the ratchet wheel, and one end of the locking cylinder is fixed to the mast, and the other end of the locking cylinder is connected to the locking pin, so that the mating end is driven to swing by the locking cylinder.

9. Crane, comprising a hauling cable, a boom and a superlift device according to any of claims 1-8;

the mast is hinged to the crane boom;

one end of the hauling rope is connected with the winch, the other end of the hauling rope is connected with the boom head of the crane boom, and the hauling rope is in sliding fit with the hauling rope guide piece.

10. Method for controlling a crane, characterized in that it comprises:

detecting the extension length of the boom in the crane according to claim 9, controlling the winch to rotate by a corresponding angle according to the extension length of the boom and releasing the corresponding length of the haulage rope;

and controlling the linear driving piece to drive the traction rope guide piece to move in the direction far away from the winch along the first direction until the tension of the traction rope reaches a preset value.

Technical Field

The application relates to the technical field of engineering machinery, in particular to a super-lift device, a crane and a control method of the super-lift device.

Background

At present, in order to improve the bending resistance of a crane boom of a crane and increase the hoisting weight of the crane boom, a super-lift mast is generally mounted on the crane boom, and the top end of the super-lift mast and the crane boom are connected through a hauling rope, when the crane boom lifts a heavy object, the hauling rope is tightened, and then the hauling rope and the super-lift mast share the bending moment of the crane boom. However, under some working conditions, when the crane boom lifts a heavy object, the hauling rope is often difficult to be in a tight state, and the moment of bending of the crane boom is difficult to be shared well by the hauling rope and the super-lift mast.

Disclosure of Invention

The application aims to solve the problems that when a heavy object is lifted by a crane boom at present, a traction rope is often difficult to be in a tight state, and the bending moment of the crane boom is difficult to be shared well through the traction rope and a super-lifting mast, and provides a super-lifting device, a crane and a control method of the super-lifting device.

In order to achieve the purpose, the following technical scheme is adopted in the application:

one aspect of the present application provides a super lift device comprising a mast and a pull rope guide, and a hoist and a linear drive mounted on the mast;

the linear driving piece is provided with the traction rope guide piece so as to drive the traction rope guide piece to move along a first direction to a direction far away from the winch through the linear driving piece;

the first direction is a length direction of the mast.

Optionally, the linear drive is located between the pull rope guide and the hoist in the first direction; one end of the mast in the first direction is a first mounting end, the first mounting end is used for connecting a crane boom, and the winch is located between the first mounting end and the linear driving piece.

The technical scheme has the beneficial effects that: therefore, the arrangement is reasonable, the traction rope is convenient to mount, the moment arm of the acting force acting on the mast through the traction rope is long, the mast can share a large bending moment for the crane boom, and the bending resistance and the lifting capacity of the crane boom are improved.

Optionally, a sliding groove extending in the first direction is provided on the mast, and the pull rope guide is slidably engaged with the sliding groove.

The technical scheme has the beneficial effects that: the sliding chute guides the relative movement between the traction rope guide piece and the mast, so that the traction rope guide piece is not easy to deflect when moving, and the problem that the traction rope guide piece deflects relative to the movement of the mast to weaken the tensioning effect of the traction rope is not easy to occur.

Optionally, the sliding groove is a kidney-shaped hole extending in the first direction, the traction rope guide comprises a pulley and an axle connected with each other, an end of the axle extends into the kidney-shaped hole, and the axle is in sliding fit with the kidney-shaped hole.

Optionally, the mast comprises two stoppers, the stoppers have guide surfaces, the two stoppers are arranged in a second direction, the guide surfaces of the two stoppers are oppositely arranged to form the sliding slot between the two guide surfaces, the second direction is perpendicular to the first direction, and the second direction and the first direction are in the same plane; the traction rope guide is provided with a sliding block, the sliding block is positioned between the two guide surfaces, and the sliding block is in sliding fit with the two guide surfaces.

Optionally, the pull-cord guide is in surface contact with the chute in a second direction, the second direction being perpendicular to the first direction, and the second direction being in the same plane as the first direction.

The technical scheme has the beneficial effects that: this can reduce the pressure between the pull-cord guide and the chute, and thus reduce the likelihood of a failure at the pull-cord guide and/or the chute.

Optionally, the hoisting machine further comprises a hoisting machine locking assembly, wherein the hoisting machine is provided with a ratchet wheel, and the hoisting machine locking assembly is used for being matched with the ratchet wheel to lock the hoisting machine.

The technical scheme has the beneficial effects that: when the linear driving piece drives the traction rope guide piece to move and then tension the traction rope, the winch is locked by the winch locking assembly, the situation that the traction rope cannot be tensioned due to the fact that the winch rotates to release the traction rope under the pulling of the traction rope can be avoided, and then reliable tensioning force is provided for the traction rope, and the guarantee is provided for hoisting a heavy object by a crane boom.

Optionally, the winch locking assembly comprises a locking oil cylinder and a locking pin, one end of the locking pin is hinged to the mast, the other end of the locking pin is used for being matched with the ratchet wheel, one end of the locking oil cylinder is fixed to the mast, and the other end of the locking oil cylinder is connected with the locking pin in a joint mode so as to drive the matching end to swing through the locking oil cylinder.

The technical scheme has the beneficial effects that: the winch locking assembly is relatively simple in structure and high in reliability.

Another aspect of the application provides a crane, which comprises a traction rope, a crane arm and the superlift device provided by the application;

the mast is hinged to the crane boom;

one end of the hauling rope is connected with the winch, the other end of the hauling rope is connected with the boom head of the crane boom, and the hauling rope is in sliding fit with the hauling rope guide piece.

A third aspect of the present application provides a control method of a crane, the method including:

detecting the extension length of the crane boom in the crane provided by the application, controlling the winch to rotate by a corresponding angle according to the extension length of the crane boom and releasing the haulage rope with a corresponding length;

and controlling the linear driving piece to drive the traction rope guide piece to move in the direction far away from the winch along the first direction until the tension of the traction rope reaches a preset value.

The technical scheme provided by the application can achieve the following beneficial effects:

according to the super-lifting device, the crane and the control method thereof, the traction rope guide part is driven to move through the linear driving part, so that the traction rope can be in a tight state under the action of the crane boom, the winch and the traction rope guide part, and the mast and the traction rope can better share the bending moment applied to the crane boom.

Additional features of the present application and advantages thereof will be set forth in the description which follows, or may be learned by practice of the present application.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments will be briefly described below. It should be apparent that the drawings in the following description are embodiments of the present application and that other drawings may be derived from those drawings by a person of ordinary skill in the art without inventive step.

FIG. 1 is a schematic partial structural view of one embodiment of a crane according to an embodiment of the present disclosure, showing a pull-in rope untensioned;

FIG. 2 is a partial schematic structural view of an embodiment of a crane according to an embodiment of the present disclosure, showing a pull rope in tension;

FIG. 3 is a schematic structural diagram of an embodiment of a superlift device according to an embodiment of the present disclosure;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a schematic partial structural view of an embodiment of a superlift device according to an embodiment of the present disclosure;

FIG. 6 is a schematic diagram of an embodiment of a pull-cord guide provided in accordance with an embodiment of the present application;

FIG. 7 is an exploded schematic view of one embodiment of a pull-cord guide provided in accordance with an embodiment of the present application;

FIG. 8 is a schematic diagram of communication connection of a control device of a crane provided in an embodiment of the present application;

fig. 9 is a schematic flow chart of a control method of a crane according to an embodiment of the present application.

Reference numerals:

100-a hauling rope;

200-a super lift device;

210-a pull-cord guide;

211-axle;

212-a pulley;

213-a slide block;

214-a pulley yoke;

215-end bearing;

220-linear drive;

230-mast;

231-kidney-shaped holes;

232-a stop block;

240-a hoist lock assembly;

241-locking the oil cylinder;

242-a locking pin;

250-a winch;

251-a ratchet;

260-a rotation angle encoder;

300-pulling a plate;

400-crane arm.

Detailed Description

The technical solutions of the present application will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

As shown in fig. 1 to 7, one aspect of the present application provides a super lift device 200 including a mast 230 and a pull rope guide 210, and a hoist 250 and a linear drive 220 mounted on the mast 230;

the pull rope guide 210 is mounted to the linear driving unit 220, so that the pull rope guide 210 is driven by the linear driving unit 220 to move in a first direction away from the winch 250;

the first direction is a length direction of the mast 230.

The traction rope 100 is wound on the hoist 250, one end of the traction rope 100 is fixed on the hoist 250, and the other end of the traction rope 100 is connected to the boom 400 by bypassing the traction rope guide 210; the linear driving member 220 is an oil cylinder, an air cylinder, a linear motor, etc., and can drive the pull rope guide 210 to move in a direction away from the winch 250, and can also drive the pull rope guide 210 to move in a direction close to the winch 250.

The device of the present application provides when using, along with the extension of jib boom 400, hoist engine 250 releases haulage rope 100, jib 400 stops the extension, hoist engine 250 stops release haulage rope 100, for the tight atress that can be better of messenger haulage rope 100, linear driving piece 220 drives haulage rope guide 210 and removes to the direction of keeping away from hoist engine 250, and the effect that makes linear driving piece 220 produce is used in haulage rope 100, haulage rope 100 is the tight state under the effect of jib 400, hoist engine 250 and haulage rope guide 210, and then make mast 230 and haulage rope 100 can be better share the moment of bending that jib 400 receives.

Optionally, the linear drive 220 is located between the pull rope guide 210 and the hoist 250 in the first direction; one end of the mast 230 in the first direction is a first mounting end for attaching the boom 400, and the winch 250 is located between the first mounting end and the linear drive 220. That is, the pull rope guide 210 is farthest from the first installation end with respect to the hoist 250 and the linear driving member 220, so that the arrangement is reasonable, the pull rope 100 is convenient to install, and the moment arm of the acting force acting on the mast 230 through the pull rope 100 is long, so that the mast 230 can share a large bending moment for the jib 400, and the bending resistance and the lifting capacity of the jib 400 are improved. Of course, it is also possible to have the pull rope guide 210 between the linear drive 220 and the hoist 250.

Optionally, a sliding slot extending in the first direction is provided on the mast 230, and the pull rope guide 210 is slidably engaged with the sliding slot. The relative movement between the pull rope guide 210 and the mast 230 is guided by the sliding groove, so that the pull rope guide 210 is not easy to deflect during movement, and the problem that the pull rope guide 210 deflects relative to the mast 230 to weaken the tensioning effect of the pull rope 100 is not easy to occur.

Alternatively, the sliding groove is a kidney-shaped hole 231 extending in the first direction, the traction rope guide 210 includes a pulley 212 and an axle 211 connected to each other, an end of the axle 211 extends into the kidney-shaped hole 231, and the axle 211 is slidably fitted into the kidney-shaped hole 231. The number of the pulleys 212 may be plural, such as two or more.

Alternatively, the sliding slot may be in the form of a kidney-shaped hole 231 as described above, wherein the mast 230 includes two stoppers 232, the stoppers 232 have guide surfaces, the two stoppers 232 are arranged in a second direction, the guide surfaces of the two stoppers 232 are oppositely arranged to form the sliding slot therebetween, the second direction is perpendicular to the first direction, and the second direction is in the same plane as the first direction; the pull-cord guide 210 has a slider 213, the slider 213 is located between the two guide surfaces, and the slider 213 is in sliding engagement with the two guide surfaces. In the present embodiment, the pull-cord guide 210 further includes a pulley yoke 214 and an end bearing 215.

Optionally, the pull-cord guide 210 is in surface contact with the chute in a second direction, the second direction being perpendicular to the first direction, and the second direction being in the same plane as the first direction. This can reduce the pressure between the pull-cord guide 210 and the chute, which in turn reduces the likelihood of a failure at the pull-cord guide 210 and/or the chute.

Optionally, the superlift device 200 provided in this embodiment of the present application further includes a winch locking assembly 240, the winch 250 has a ratchet 251, and the winch locking assembly 240 is configured to cooperate with the ratchet 251 to lock the winch 250. When the linear driving element 220 drives the hauling rope guide element 210 to move and then tension the hauling rope 100, the winch 250 is locked by the winch locking assembly 240, so that the situation that the hauling rope 100 cannot be tensioned due to the fact that the winch 250 rotates to release the hauling rope 100 under the pulling of the hauling rope 100 can be avoided, and further reliable tensioning force is provided for the hauling rope 100, and a guarantee is provided for the crane boom 400 to lift heavy objects.

Optionally, the winch locking assembly 240 includes a locking cylinder 241 and a locking pin 242, one end of the locking pin 242 is hinged to the mast 230, the other end of the locking pin 242 is a mating end for mating with the ratchet 251, one end of the locking cylinder 241 is fixed to the mast 230, and the other end of the locking cylinder 241 is connected to the locking pin 242, so that the locking cylinder 241 drives the mating end to swing. The structure of the winch locking assembly 240 is relatively simple and reliable.

Another aspect of the present application provides a crane comprising a hauling cable 100, a boom 400 and a superlift device 200 as provided by the embodiments of the present application;

the mast 230 is hinged to the boom 400;

one end of the hauling cable 100 is connected to the winch 250, and the other end is connected to the boom head of the boom 400, and the hauling cable 100 is slidably fitted with the hauling cable guide 210.

The crane may further comprise a pulling plate 300, one end of the pulling plate 300 is hinged to the top end of the mast 230, and the other end is connected to the root of the mast 230. The pulling force of the pull-cord 100 on the mast 230 can be shared by the pull plate 300. Of course, the pull plate 300 may also be hinged to the pull-cord guide 210 instead of the mast 230.

According to the crane provided by the embodiment of the application, the super lifting device 200 provided by the embodiment of the application is adopted, the hauling cable 100 is in a tight state under the action of the jib 400, the winch 250 and the hauling cable guide 210, and the mast 230 and the hauling cable 100 can better share the bending moment applied to the jib 400.

A third aspect of the present application provides a method for controlling a crane, which may be implemented by using a control device of a crane, where the control device may be communicatively connected to each component in the crane provided in the embodiments of the present application, for example: as shown in fig. 8, the control device of the crane is communicatively connected to a distance sensor provided on the boom 400, the control device of the crane is communicatively connected to the hoist 250 and the linear driving unit 220, respectively, and is also communicatively connected to a tension sensor connected to the rope guide 210, and is also communicatively connected to a rotation angle encoder 260 installed on the hoist 250. Specifically, as shown in fig. 9, the method for controlling the crane includes:

s10: detecting the extension length of the crane boom 400, controlling the winch 250 to rotate by a corresponding angle according to the extension length of the crane boom 400 and releasing the haulage rope 100 with a corresponding length;

s20: the linear driving unit 220 is controlled to drive the hauling rope guide 210 to move in a direction away from the winch 250 along the first direction until the tensioning force of the hauling rope 100 reaches a preset value, which can be set manually.

In the embodiment of the present application, the control device of the crane may be specifically a controller, and the controller may adopt an operation control such as a central processing unit, and may include a microprocessor or other processor device and/or a logic device, and the central processing unit receives an input and controls the operation of each component of the crane. The control device of the crane can be integrally arranged in the crane or independently arranged and applied to the outside of the crane.

In this embodiment, a distance sensor for detecting the extension length of the boom 400 may be installed, the tow rope guide 210 may be connected to the tension sensor to collect the tension of the tow rope 100, a rotation angle encoder 260 may be installed on the hoist 250, the rotation angle encoder 260 detects the rotational angle data of the hoist 250, the distance sensor, the tension sensor and the rotation angle encoder are communicatively connected to the controller, and the hoist 250 and the linear actuator 220 are also communicatively connected to the controller to control the hoist 250 and the linear actuator 220 to start and stop according to the collected data.

According to the control method of the crane provided by the embodiment of the application, the starting and stopping of the winch 250 and the linear driving piece 220 are automatically controlled according to the extension length of the crane boom 400, so that the automatic pre-tightening of the traction rope 100 is realized, the automation degree of the crane is improved, and the operation is simplified.

After step S10 and before step S20, when the hoist employs the hoist lock assembly 240, the method further comprises:

s11: the controller hoist lock assembly 240 cooperates with the ratchet 251 of the hoist 250 to lock the hoist 250.

In the present embodiment, when the pre-tensioning of the traction rope 100 is completed, the automatic control of the tensioning of the traction rope 100 can be stopped by manual operation.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.