CN217535264U

CN217535264U - Counterweight sliding displacement mechanism and crane

Info

Publication number: CN217535264U
Application number: CN202221105774.7U
Authority: CN
Inventors: 李伟; 马善华; 朱国乾; 张艳伟
Original assignee: Xuzhou Heavy Machinery Co Ltd
Current assignee: Xuzhou Heavy Machinery Co Ltd
Priority date: 2022-05-10
Filing date: 2022-05-10
Publication date: 2022-10-04
Anticipated expiration: 2032-05-10

Abstract

The utility model discloses a counterweight sliding displacement mechanism and a crane, belonging to the field of engineering machinery cranes; including the revolving stage, set up the balanced weight in revolving stage afterbody below, the one end sets up the drive arrangement that shifts that the other end is connected with the balanced weight on the revolving stage to and set up the glide machanism between revolving stage afterbody and balanced weight, glide machanism includes guide rail and spout, the guide rail is the I shape, the spout can hold the one end of guide rail and articulate, and arbitrary one of guide rail and spout sets up in revolving stage afterbody below as fixed part, and another item then sets up on balanced weight, the drive arrangement that shifts can drive guide rail and spout produce relative movement and realize that balanced weight stretches out and retract the revolving stage afterbody. The utility model discloses a drive arrangement drive rail that shifts and spout produce relative movement and make the counter weight stretch out and retract the revolving stage afterbody can lighten whole car weight when increasing antidumping moment, and whole car compact structure, improves whole car flexibility and operating performance.

Description

Balancing weight sliding displacement mechanism and crane

Technical Field

The utility model relates to an engineering crane field especially relates to a balanced heavy displacement mechanism and hoist that slides.

Background

Referring to fig. 1, the off-road tyre crane is a wheel crane capable of carrying out lifting and traveling operations, and the counterweight is an important part which is arranged at the rear tail of a rotary table of the crane to keep the moment balance of the whole crane and prevent the crane from tipping.

Referring to fig. 2, in the existing industry, a middle-small tonnage crane mainly utilizes a fastener or an oil cylinder to fix a counterweight at the rear tail of a rotary table. In recent years, with the higher and higher requirements of customers on the operation performance of the crane, the crane needs to have larger anti-overturning moment, so that the stability of the whole crane is improved. However, since the position of the conventional counterweight is fixed in the crane operation process, the anti-overturning moment of the whole crane can be increased only by increasing the weight of the counterweight, and the stability of the whole crane is improved, so that the designed weight of the crane product is increased more and more, and meanwhile, the arrangement of the gravity center and the space size of the whole crane is difficult due to the requirements of road regulations on vehicles and the limitation of narrow operation scene space, so that the contradiction between the increase of the anti-overturning moment of the whole crane and the increase of the weight of the vehicle, the deterioration of the maneuvering flexibility and the large design size of the structural space is caused.

Disclosure of Invention

An object of the utility model is to overcome prior art not enough, provide a balanced heavy displacement mechanism and hoist that slides, produce relative movement through using the drive arrangement drive guide rail that shifts and spout, make balanced heavy stretch out and withdrawal revolving stage afterbody to the solution causes whole car weight to increase when increasing complete machine antidumping moment, and flexible flexibility is poor, technical problem that the structure is not compact.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

the utility model provides a balanced heavy displacement mechanism that slides, includes the revolving stage, sets up balanced heavy that revolving stage afterbody below, one end sets up the drive arrangement that shifts that the other end is connected with the balance weight on the revolving stage to and set up the glide machanism between revolving stage afterbody and balance weight, glide machanism includes guide rail and spout, the guide rail is the I shape, the spout can hold the one end of guide rail and articulate, arbitrary one of guide rail and spout sets up as fixed part revolving stage afterbody below, another then sets up balanced heavy is last, the drive arrangement that shifts can drive guide rail and spout produce relative movement and realize that balanced heavy stretches out and retract the revolving stage afterbody.

Further, the guide rail is arranged below the tail part of the rotary table as a fixed part, and the sliding groove is a T-shaped sliding groove formed in the surface of the balance weight.

The sliding groove is arranged below the tail part of the rotary table as a fixing part, the guide rail is arranged on the upper surface of the counterweight, the sliding groove is of a hollow box-shaped structure, and a groove along the length direction is formed in the lower surface of the sliding groove.

Furthermore, the displacement driving device is an oil cylinder.

Furthermore, the displacement driving device is an oil cylinder, the oil cylinder is connected with the balance weight through a guide rail arranged on the upper surface of the balance weight, and the sliding groove can accommodate the oil cylinder to stretch into.

Furthermore, the guide rails and the sliding grooves are 2 and are respectively arranged at the lower parts of two side surfaces of the tail part of the rotary table as one item of a fixing part.

Further, the balance weight hanging mechanism is further included, one end of the balance weight hanging mechanism is arranged on the rotary table, and the other end of the balance weight hanging mechanism is connected with the rear end of the balance weight and can move along with the balance weight.

Further, the counterweight suspension mechanism includes: the suspension box type lifting device comprises suspension box type bodies arranged above the tail portions of the two sides of the rotary table, a suspension extension rod capable of extending and retracting in the suspension box type bodies, and a tension member, wherein one end of the tension member is connected with the suspension extension rod, and the other end of the tension member is connected with the balance weight.

The counterweight suspending mechanism is a pulling plate, one end of the pulling plate is connected with the rotary table through a pin shaft and is provided with a long groove for the pin shaft to slide, and the other end of the pulling plate is movably connected with the counterweight.

Further, a locking device is included for locking the position when the counterweight is slidably displaced to the predetermined position.

The utility model discloses still protect a hoist, it uses foretell balanced heavy dislocation mechanism that slides.

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

1. the utility model discloses a balanced weight displacement mechanism that slides uses the drive arrangement that shifts to drive guide rail and spout and produce relative movement, makes the balanced weight stretch out and retract the revolving stage afterbody, can effectively alleviate balanced weight under the condition that satisfies the equal antidumping moment of complete machine to effectively alleviate whole car weight when reduce cost, and effectively reduce whole car length direction size, make whole car compact structure, satisfy the requirement and the narrow space operation scene requirement of relevant road regulation to whole car size;

2. the crane using the counterweight sliding displacement mechanism of the utility model can switch the counterweight to the required position under the two states of running and operation, the counterweight is in the tightening state under the running state and is contracted under the rotary table, and the counterweight is moved out of the tail part of the rotary table under the operation state; under the condition of meeting the requirement of the space size of the whole crane, the stability of the whole crane under the working conditions of large arm length and large amplitude can be effectively improved, so that the hoisting operation performance of the crane is effectively improved.

3. The utility model discloses a balanced heavy displacement mechanism that slides shares balanced heavy part gravity through the pulling force mechanism that balanced heavy hung in the mechanism, can effectively alleviate the frictional force of guide rail and spout structure, guarantees that balanced heavy slip shifts smoothly, and no jamming.

4. The utility model discloses a balanced heavy displacement mechanism that slides is provided with safety locking device, can ensure hoist operation security.

Drawings

FIG. 1: the crane has a schematic hoisting diagram.

FIG. 2: prior art counterweight mounting styles;

FIG. 3 is a schematic view of the initial state of the counterweight displacement according to an embodiment of the present invention;

FIG. 4: the state schematic diagram of the counterweight slippage and deflection process of the embodiment of the utility model;

FIG. 5 is a schematic view of a counterweight sliding and shifting driving mechanism according to an embodiment of the present invention;

FIG. 6: the structure of the guide rail of the embodiment of the utility model is schematically shown;

FIG. 7: the structure schematic diagram of the counterweight T-shaped chute of one embodiment of the utility model;

FIG. 8 is a schematic view of a position of a running state counterweight according to an embodiment of the present invention;

FIG. 9 is a schematic view of the position of the counterweight according to an embodiment of the present invention in an operating state;

FIG. 10: the utility model discloses another embodiment of the balance weight slippage displacement initial state sketch map;

FIG. 11: the state diagram of the slippage and deflection process of the counterweight of another embodiment of the utility model;

FIG. 12: the structure of the guide rail of another embodiment of the utility model is schematically shown;

FIG. 13: the chute structure of another embodiment of the utility model is schematically shown;

FIG. 14 is a schematic view of a position of a running state counterweight according to another embodiment of the present invention;

FIG. 15 is a schematic view of the position of the counterweight according to another embodiment of the present invention in an operating state;

in the figure: 1. A turntable; 2. a counterweight; 3. a displacement drive device; 4, a sliding mechanism; 5. A counterweight suspension mechanism; 21. a counterweight lifting lug; 22. an oil cylinder support; 31. a displacement driving device oil cylinder support; 41. a guide rail; 42. a chute; 43 lifting lugs; the locking positioning seat 44; 51. hanging the box type; 52. hanging an extension bar; 53. a tension member; 541. a pin shaft; 542. a pin shaft; 531. a pull rod; 532. pulling a plate; l, an anti-overturning force arm in a driving state; l + X, the anti-overturning force arm in the working state.

Detailed Description

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

Example 1

As shown in fig. 3 to 9, the counterweight sliding displacement mechanism comprises a rotary table 1, a counterweight 2, a displacement driving device 3 and a sliding mechanism 4. The counterweight 2 is arranged below the tail part of the rotary table 1, and the counterweight 2 extends out of and retracts into the tail part of the rotary table 1 under the drive of the displacement drive device 3 through a sliding mechanism 4.

The sliding mechanism 4 is a sliding friction pair composed of a guide rail 41 and a sliding groove 42 as a sliding bearing stress structure in the sliding and deflection process of the counterweight 2, wherein the guide rail 41 is in an I-shaped structure and is connected with a tail frame of the rotary table into a whole through fasteners such as bolts and the like; the chute 42 is a T-shaped chute provided on the surface of the counterweight 2, and the counterweight 2 slides on the lower cover plate of the i-shaped guide rail 41 by being hung on the T-shaped chute 42, so that the counterweight 2 can slide and shift. The two guide rails 41 and the two slide grooves 42 are respectively arranged below the opposite side plates at the tail part of the rotary table, and the balance weight 2 is correspondingly provided with a T-shaped slide groove 42.

The displacement driving device 3 can be a hydraulic oil cylinder, one end of which is fixed on the rotary table 1 through the oil cylinder support 22 and the displacement driving device oil cylinder support 31, and the other end is connected with the balance weight 2, thereby pushing the balance weight 2 to move. The cylinder position may be set between two guide rails 41.

The turntable 1 is also provided with a counterweight suspension mechanism 5 which comprises a suspension box type structure 51, a suspension extension bar 52 and a tension member 53; the suspension box-type structure 51 is fixed on the rear tail of the rotary table 1, the suspension extension rod 52 can stretch out and draw back in the suspension box-type structure 51 under the action of external force, one end of a tension member 53 is connected with the suspension extension rod 52, the other end of the tension member is connected with the counterweight 2, the tension member 53 can be a pull rod 531, one end of the pull rod 531 is connected to the suspension extension rod 52 through a pin 541, and the other end of the pull rod 531 is connected to a counterweight lifting lug 21 on the counterweight 2; the tension member 53 may be replaced by a flexible member such as a wire rope or a cable. After the counterweight 2 is pushed out by the deflection driving device 3, the tension member 53 in the counterweight suspension mechanism 5 can share the gravity of the counterweight part, so that the deformation of the guide rail is reduced, the friction force of the I-shaped guide rail and the sliding groove is reduced, and the sliding deflection of the counterweight is smooth without clamping stagnation. Further, a limit stopper may be provided in the counterweight suspending mechanism 5 so that the suspending extension bar 52 cannot be extended and retracted continuously when extended and retracted to a certain position in the suspending box-type structure 51, and for example, a stopper or the like may be provided in the suspending box-type structure 51.

The utility model discloses a balanced heavy displacement of sliding still can set up locking device in the structure, when balanced heavy displacement of sliding to anticipated operation position, through locking device, for example, hydraulic pressure round pin axle or mechanical plug round pin axle etc. mechanism lock die to guarantee hoist operation security.

Example 2

As shown in fig. 10 to fig. 15, the present embodiment is different from embodiment 1 mainly in that:

the sliding groove 42 is used as a fixed part and arranged below the tail part of the rotary table 1, the guide rail 41 is arranged on the upper surface of the balance weight 2 and is fixed on a frame at the tail part of the rotary table 1 in a welding mode and the like, and the sliding groove 42 is of a hollow box-shaped structure with a fit gap reserved for a lower cover plate; the guide rail 41 is in an I-shaped structure and is connected with the balance weight into a whole through fasteners such as bolts, lifting lugs 43 are arranged at two ends of the upper surface of the guide rail 41, one lifting lug 43 is connected with the oil cylinder, and the other lifting lug 43 is connected with a tension member 53 of the balance suspension mechanism 5; a plurality of locking positioning seats 44 are arranged between the lifting lugs 43 at the two ends of the guide rail 41, and the locking device uses a pin shaft to pass through a hole formed in the sliding chute 42 and the locking positioning seats 44 to realize the position locking of sliding deflection. The slide groove 42 of this embodiment is adapted to accommodate at least the cylinder extension. The counterweight suspending mechanism 5 can also be a pulling plate 532, one end of the pulling plate 532 is provided with a long groove, one end of the pulling plate 532 is connected with the tail part of the rotary table 1 through a pin shaft 542, and the other end is movably connected with the rear part of the counterweight 2.

Example 3

A crane using the counterweight displacement mechanism according to embodiment 1 or embodiment 2. As shown in fig. 8-9 and fig. 14-15, when the whole vehicle is in a running or non-hoisting working condition, the counterweight is in a retracted state and is compactly positioned below the rear tail frame of the rotary table; when the whole crane is in a hoisting operation working condition, the oil cylinder drives the balance weight to slide and extend out of the tail part of the rotary table to an expected position, so that the integral gravity center of the balance weight moves backwards, the anti-overturning force arm is increased from L to L + X, the anti-overturning moment of the whole crane is increased, and the operation performance of the crane is effectively improved.

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

Claims

1. The utility model provides a balanced heavy displacement mechanism that slides, characterized by, includes the revolving stage, sets up balanced heavy of revolving stage afterbody below, one end sets up the drive arrangement that shifts that the other end is connected with the balance weight on the revolving stage to and set up the glide machanism between revolving stage afterbody and balance weight, glide machanism includes guide rail and spout, the guide rail is the I shape, the spout can hold the one end of guide rail and articulate, arbitrary one of guide rail and spout sets up as fixed part revolving stage afterbody below, another item then sets up on the balanced weight, the drive arrangement that shifts can drive guide rail and spout produce relative movement and realize that the balanced weight stretches out and retract the revolving stage afterbody.

2. A counterweight sliding displacement mechanism according to claim 1, wherein said guide rail is provided as a fixed member below the tail of said turn table, and said slide groove is a T-shaped slide groove provided on the surface of said counterweight.

3. A counterweight sliding displacement mechanism according to claim 1 wherein said slide groove is provided as a fixed member below the rear portion of said turn table, said guide rail is provided on the upper surface of said counterweight, and said slide groove is of a hollow box-shaped structure and has a groove formed on the lower surface thereof in the longitudinal direction.

4. A counterweight sliding displacement mechanism according to claim 1 or 2, wherein said displacement driving means is a cylinder.

5. A counterweight sliding displacement mechanism according to claim 3 wherein said displacement actuator is a cylinder connected to the counterweight by a guide rail provided on the upper surface of the counterweight, said slide slot being adapted to receive the cylinder therein.

6. A counterweight sliding displacement mechanism according to claim 1 wherein said guide rail and said slide groove are 2, and one of said fixing members is provided at a lower portion of each of both side surfaces of said rear portion of said turn table.

7. The apparatus as claimed in claim 1, further comprising a counterweight suspending means having one end disposed on the turntable and the other end connected to a rear end of the counterweight and movable with the counterweight.

8. A counterweight displacement mechanism according to claim 7 wherein said counterweight suspension means comprises: the hanging box type lifting mechanism comprises hanging box types arranged above the tail portions of the two sides of the rotary table, hanging extension rods capable of extending and retracting in the hanging box types, and tension members with one ends connected with the hanging extension rods and the other ends connected with the balance weight.

9. A counterweight sliding and shifting mechanism according to claim 7, wherein said counterweight suspending mechanism is a pulling plate, one end of said pulling plate is connected with the rotary table through a pin shaft and is provided with a long slot for the pin shaft to slide, and the other end is movably connected with the counterweight.

10. The counterweight sliding displacement mechanism according to claim 1, further comprising a locking device for locking the counterweight when it has reached a predetermined position.

11. A crane, wherein the counterweight displacement mechanism according to any one of claims 1 to 10 is used.