CN216004996U - Crane luffing mechanism and crane thereof - Google Patents

Abstract

The utility model belongs to the technical field of engineering machine tool, specifically, relate to a hoist luffing mechanism and hoist thereof. The crane luffing mechanism comprises a base, a boom, a movable support, a luffing telescopic member and a movable support driving member. Wherein the boom includes a pivotally connected end connected to the base and a linearly projecting extended end. The movable support is arranged on the suspension arm and can slide linearly along the suspension arm. The amplitude-variable telescopic component is arranged on one transverse side of the suspension arm in an inclined strut shape, and two ends of the amplitude-variable telescopic component are respectively in pivot connection with the base and the movable support. And the movable support driving component is used for driving the movable support to linearly slide along the suspension arm. Particularly, the movable support driving member can drive the movable support to slide linearly along the suspension arm, so that the force arm acted on the suspension arm by the variable-amplitude telescopic mechanism is changed by adjusting the position of the movable support on the suspension arm in the variable-amplitude process of the suspension arm, and the jacking force required to be provided by the variable-amplitude telescopic mechanism in the variable-amplitude process is improved.

Description

Crane luffing mechanism and crane thereof

Technical Field

The utility model belongs to the technical field of engineering machine tool, specifically, relate to a hoist luffing mechanism and hoist thereof.

Background

As shown in fig. 3, in the conventional crane luffing mechanism, a boom 20 is pivotally connected to a base 10, is pitched between the boom 20 and the base 10 using a luffing single-acting cylinder, and drives the boom 20 to pitch. However, since the pivot connection between the luffing single-acting cylinder and the boom 20 is fixed, the length of the moment arm of the single-acting cylinder acting on the boom 20 is always consistent during the luffing of the boom 20 by the single-acting cylinder.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned defect or not enough of prior art, the utility model provides a hoist luffing mechanism and hoist thereof, this hoist luffing mechanism can adjust the moment that becomes width of cloth telescopic member and act on the davit.

In order to achieve the above object, the utility model provides a crane luffing mechanism in the first aspect, this crane luffing mechanism includes:

a base;

a boom including a pivotal connection end connected to the base and a linearly projecting extension end;

the movable support is arranged on the suspension arm and can slide linearly along the suspension arm;

the amplitude-variable telescopic component is arranged on one transverse side of the suspension arm in an inclined strut shape, and two ends of the amplitude-variable telescopic component are respectively connected with the base and the movable support in a pivoting manner; and

and the movable support driving component is used for driving the movable support to linearly slide along the suspension arm.

Optionally, the luffing telescoping member is a multi-stage hydraulic cylinder.

Optionally, the cradle drive member is also a multi-stage hydraulic cylinder and is located between the pivotal connection end of the boom and the cradle.

Optionally, the boom further includes a fixed support extending outward and close to the pivot connection end, and two ends of the movable support driving member are respectively connected to the fixed support and the movable support.

Optionally, the crane luffing mechanism is switchable between a fully lowered jib state, in which both the luffing telescoping member and the travelling support drive member are at piston recovery limit positions, and a fully raised jib state; in the fully jib lifting state, the amplitude-variable telescopic member and the amplitude-variable telescopic member are both positioned at the piston extending limit position.

Optionally, in the fully arm-falling state, the suspension arm is in a horizontal state, and in the fully arm-lifting state, an included angle between the suspension arm and a horizontal plane is 75 ° to 83 °.

Optionally, the axial center line of the luffing telescoping member and the length direction center line of the boom are located on the same plane.

Optionally, the pivotal connection of the luffing telescoping member to the base is lower than the pivotal connection of the boom to the base.

Optionally, the suspension arm is provided with a slide rail along the length direction, and the movable support is mounted on the slide rail.

The utility model discloses the second aspect provides a hoist, and this hoist includes foretell hoist luffing mechanism.

The utility model discloses an among the hoist luffing mechanism, the pivot joint end and the base pivot connection of davit, the other end is for extending the end, and the luffing telescopic member of bracing davit can drive the davit and rotate around the pivot joint end to make the every single move of davit become the width of cloth. One end of the amplitude-variable telescopic member is pivotally connected with the base, and the other end of the amplitude-variable telescopic member is pivotally connected with a movable support arranged on the suspension arm. Particularly, the movable support driving member can drive the movable support to slide linearly along the suspension arm, so that the force arm acted on the suspension arm by the variable-amplitude telescopic mechanism is changed by adjusting the position of the movable support on the suspension arm in the variable-amplitude process of the suspension arm, and the jacking force required to be provided by the variable-amplitude telescopic mechanism in the variable-amplitude process is improved.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is one of the schematic views of a crane luffing mechanism according to an embodiment of the present invention;

fig. 2 is a second schematic view of a crane luffing mechanism according to an embodiment of the present invention;

fig. 3 is a schematic view of a prior art crane luffing mechanism.

Description of reference numerals: 10. a base; 20. a suspension arm; 21. a fixed support; 30. a movable support; 40. a variable amplitude telescoping member; 50. movable support driving member

Detailed Description

The following describes in detail embodiments of the present invention with reference to the accompanying drawings. It is to be understood that the description herein is only intended to illustrate and explain embodiments of the present invention, and is not intended to limit embodiments of the present invention.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the embodiments of the present invention, unless otherwise specified, the use of directional terms such as "upper, lower, top, bottom" and "upper" are generally used with respect to the orientation shown in the drawings or the positional relationship of the components with respect to each other in the vertical, vertical or gravitational direction.

The invention will be described in detail below with reference to the accompanying drawings in conjunction with exemplary embodiments.

The exemplary embodiment of the present invention provides a crane luffing mechanism, which comprises a base 10, a boom 20, a movable support 30, a luffing telescoping member 40, and a movable support driving member 50. Wherein the boom 20 includes a pivotally connected end connected to the base 10 and a linearly projecting extended end. The cradle 30 is mounted on the boom 20 and is capable of linear sliding movement along the boom 20. The amplitude expansion member 40 is arranged on one lateral side of the boom 20 in a diagonal bracing manner, and two ends of the amplitude expansion member are respectively and pivotally connected with the base 10 and the movable support 30. The cradle drive member 50 is used to drive the linear sliding movement of the cradle 30 along the boom 20.

Specifically, as shown in fig. 1 and 2, a pivotally connected end of boom 20 is pivotally connected to base 10, and the other end is an extended end, and luffing member 40 of pitched top boom 20 can drive boom 20 to rotate about the pivotally connected end to luff boom 20. The luffing telescoping member 40 is pivotally connected at one end to the base 10 and at the other end to a travelling support 30 provided on the boom arm 20. In particular, the cradle drive member 50 is capable of driving the cradle 30 to slide linearly along the boom arm 20, so that the arm of force of the luffing telescoping member 40 acting on the boom arm 20 is changed by adjusting the position of the cradle 30 on the boom arm 20 during luffing of the boom arm 20, thereby improving the lift force required to be provided by the luffing telescoping member 40 during luffing.

The movable support 30 and the suspension arm 20 can be connected in a sliding manner in various ways, for example, a linear chute is arranged on the suspension arm 20, and the movable support 30 is embedded in the linear chute and can slide along the linear chute; alternatively, the cradle 30 can be slidably mounted over the boom 20. In the present embodiment, the boom 20 is provided with a slide rail along the length direction, and the cradle 30 is mounted on the slide rail, so that the cradle 30 can slide linearly along the boom 20. The sliding connection of cradle 30 to boom 20 is not illustrated.

It should be noted that, through the stress analysis of the existing crane luffing mechanism, it is found that the jacking force required to be provided by the luffing single-acting cylinder decreases as the luffing elevation angle of the boom 20 increases (from the horizontal state to the vertical state). As shown in fig. 1 and fig. 2, in this embodiment, the amplitude-variable telescopic member 40 is a multi-stage hydraulic cylinder, the multi-stage hydraulic cylinder is formed by sleeving a multi-stage piston cylinder, the piston rod end of the multi-stage hydraulic cylinder firstly pushes the one-stage piston with a large effective action area to move in the extending process, and then pushes the two-stage piston with a small area to move, because the flow of the oil inlet is unchanged, the thrust with a large effective action area is large, and along with the extension of the piston rod, the jacking force generated by the amplitude-variable telescopic member 40 is gradually reduced. Therefore, the variation process of the jacking force generated by the multistage hydraulic cylinder just matches the variation process of the jacking force required by the amplitude variation of the boom 20, and secondly, the working stroke of the multistage hydraulic cylinder is longer. Of course, the luffing telescoping member 40 may be any one of telescopic functional parts such as a single-acting hydraulic cylinder, an electric push rod, or an air cylinder.

Since the embodiment of the present invention can realize the linear sliding connection between the boom 20 and the cradle 30 through the sliding rail, the cradle driving member 50 can be a motor cooperating with a rack and pinion to drive the cradle 30 to slide linearly, or an electric push rod directly drives the cradle 30 to slide linearly. However, considering the large crane load, the hydraulic cylinder is loaded more strongly, and therefore, in the embodiment of the present invention, the cradle driving member 50 is also a multi-stage hydraulic cylinder and is located between the pivotal connection end of the boom 20 and the cradle 30.

Further, the boom 20 further includes a fixed support 21 extending outward near the pivot connection end, and the movable support driving member 50 is connected to the fixed support 21 and the interactive support 30 at two ends thereof.

Specifically, under the condition that the movable support driving member 50 is a multi-stage hydraulic cylinder, the fixed support 21 is used for installing the movable support driving member 50, the fixed support 21 is arranged close to the pivot connection end, and when the movable support driving member 50 is in a contracted state, an included angle between the amplitude variation telescopic member 40 and the suspension arm 20 is larger, so that a component acting force generated by the amplitude variation telescopic member 40 and perpendicular to the suspension arm 20 is also larger, and the amplitude variation is convenient to start.

In the embodiment of the present invention, the crane luffing mechanism can be switched between a fully jib lowering state and a fully jib lifting state, and in the fully jib lowering state, the luffing telescopic member 40 and the movable support driving member 50 are both located at the piston recovery limit position; in the fully armed state, both the horn 40 and the horn 40 are at the extreme piston extension positions

Specifically, under the condition that the variable-amplitude telescopic member 40 and the movable support driving member 50 are both multi-stage hydraulic cylinders, and when the variable-amplitude telescopic member 40 and the movable support driving member 50 are both located at the piston recovery limit positions, the crane variable-amplitude mechanism is in a completely arm-falling state. With both the luffing telescoping member 40 and the travelling support drive member 50 in the extreme piston extension position, the crane luffing mechanism is in a fully jib configuration. Obviously, compare in adopting the single-action pneumatic cylinder among the prior art, multistage pneumatic cylinder is longer at the stroke under the state of stretching out completely, compares in the prior art single-action pneumatic cylinder and davit 20's junction rigidity, the utility model provides a movable support 30 moves up, and the junction between the flexible component 40 of the change of width and the davit 20 leans on more, and davit 20's stability improves, and the bucking can not take place more. In the present embodiment, the boom 20 is in a horizontal state in the fully lowered state, and the angle between the boom 20 and the horizontal plane is 75 ° to 83 ° in the fully raised state. Specifically, in the fully jib-lifting state of cranes of different models, the included angle between the jib 20 and the horizontal plane is different, and the general maximum elevation angle range is 75-83 °.

In the embodiment of the present invention, the axial center line of the amplitude-change telescopic member 40 and the length direction center line of the suspension arm 20 are located on the same plane. In other words, where the luffing member 40 is a multi-stage hydraulic cylinder, the luffing member 40 is located laterally intermediate the boom 20. In this manner, the luffing telescoping member 40 does not develop a torsional force that rotates the boom arm 20 about the longitudinal centerline during extension.

In the embodiment of the present invention, the pivotal connection of the luffing telescoping member 40 to the base 10 is lower than the pivotal connection of the boom 20 to the base 10.

Specifically, when the crane luffing mechanism falls to the horizontal state, as the pivotal connection position of the luffing telescoping member 40 and the base 10 is lower than the pivotal connection position of the boom 20 and the base 10, a clamping space for fixedly mounting the movable support driving member 50 is formed between the luffing telescoping member 40 and the boom 20.

The exemplary embodiment of the utility model provides a hoist is still provided in this hoist, and this hoist includes foretell hoist luffing mechanism. Obviously, the crane obviously has all the advantages brought by the crane luffing mechanism, and detailed description is omitted here. The crane provided by the exemplary embodiment includes other components that can interact with the crane luffing mechanism described above or be provided independently of the crane luffing mechanism, and the variety of other components can be adapted for different crane products.

The above describes in detail optional implementation manners of embodiments of the present invention with reference to the accompanying drawings, however, the embodiments of the present invention are not limited to the details in the above implementation manners, and in the technical concept scope of the embodiments of the present invention, it is possible to perform various simple modifications on the technical solutions of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

It should be noted that, in the above-mentioned embodiments, the various technical features described in the above-mentioned embodiments can be combined in any suitable way without contradiction, and in order to avoid unnecessary repetition, the embodiments of the present invention do not separately describe various possible combinations.

In addition, various different implementation manners of the embodiments of the present invention can be combined arbitrarily, and as long as it does not violate the idea of the embodiments of the present invention, it should be considered as the disclosure of the embodiments of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.

Claims (10)

1. A crane horn, comprising:

a base (10);

a boom (20) comprising a pivotally connected end connected to the base (10) and a linearly projecting extended end;

a movable support (30) which is arranged on the suspension arm (20) and can slide linearly along the suspension arm (20);

the amplitude variation telescopic component (40) is arranged on one transverse side of the suspension arm (20) in an inclined strut shape, and two ends of the amplitude variation telescopic component are respectively connected with the base (10) and the movable support (30) in a pivoting mode; and

a cradle drive member (50) for driving the cradle (30) to slide linearly along the boom (20).

2. A crane horn according to claim 1, wherein the horn member (40) is a multi-stage hydraulic cylinder.

3. The crane horn of claim 2, wherein the travelling support drive member (50) is also a multi-stage hydraulic cylinder and is located between the pivotally connected end of the boom (20) and the travelling support (30).

4. The crane luffing mechanism according to claim 3, wherein the boom (20) further comprises a fixed support (21) extending outward near the pivotally connected end, and the movable support driving member (50) is connected at both ends to the fixed support (21) and the movable support (30), respectively.

5. The crane horn of claim 3, wherein the crane horn is switchable between a fully down-jib condition, wherein the horn (40) and the travelling support drive member (50) are both at piston recovery limits; in the fully armed state, both the luffing telescoping member (40) and the luffing telescoping member (40) are located at a piston extension limit.

6. The crane luffing mechanism according to claim 5, wherein the boom (20) is in a horizontal position in the fully down position and the boom (20) is angled 75 ° to 83 ° from a horizontal plane in the fully up position.

7. A crane horn according to claim 2, wherein the axial centerline of the horn member (40) is in the same plane as the lengthwise centerline of the boom (20).

8. The crane horn of claim 1, wherein the pivotal connection of the horn member (40) to the base (10) is lower than the pivotal connection of the boom (20) to the base (10).

9. The crane luffing mechanism according to any one of claims 1 to 8, wherein the boom (20) is provided with a slide rail along a length direction, and the movable support (30) is mounted on the slide rail.

10. A crane, characterized in that the crane comprises a crane luffing according to any one of claims 1 to 9.

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