阅读说明：本技术 一种起重机伸缩臂及起重机 (Telescopic arm of crane and crane ) 是由 周斌 于 2020-06-23 设计创作，主要内容包括：本发明提供了一种起重机伸缩臂及起重机,涉及起重机技术领域。起重机伸缩臂包括基本臂、一级伸缩油缸和套接在基本臂内的伸缩臂组,一级伸缩油缸安装于伸缩臂组内,用于驱动伸缩臂组伸缩。起重机采用了上述的起重机伸缩臂,减少了起重机在吊装过程中的动力输出,从而减少能源消耗,同时也减轻了起重机的重量,减少了起重机在行驶过程中的油耗。(The invention provides a crane telescopic boom and a crane, and relates to the technical field of cranes. The telescopic arm of the crane comprises a basic arm, a primary telescopic oil cylinder and a telescopic arm group sleeved in the basic arm, wherein the primary telescopic oil cylinder is arranged in the telescopic arm group and used for driving the telescopic arm group to stretch. The crane adopts the telescopic arm of the crane, so that the power output of the crane in the hoisting process is reduced, the energy consumption is reduced, the weight of the crane is reduced, and the oil consumption of the crane in the running process is reduced.)

1. The telescopic arm of the crane is characterized by comprising a basic arm, a primary telescopic oil cylinder and a telescopic arm group sleeved in the basic arm, wherein the primary telescopic oil cylinder is arranged in the telescopic arm group and used for driving the telescopic arm group to stretch.

2. The telescopic crane boom of claim 1, further comprising a rope aligning mechanism, a first connecting member and a second connecting member, wherein the rope aligning mechanism comprises a first boom extension rope assembly and a first boom retraction rope assembly, and the telescopic boom group comprises a first telescopic boom and a second telescopic boom;

first outrigger rope subassembly includes first outrigger wheel and the first arm rope that stretches, first arm rope subassembly that contracts includes first arm wheel and the first arm rope that contracts, first outrigger wheel is fixed in the bottom of first flexible arm, first arm wheel that contracts is fixed in the top of first flexible arm, first arm rope that stretches with the one end of first arm rope that contracts is fixed in on the basic arm, the other end warp of first arm rope first outrigger wheel with the warp of first arm rope that contracts the other end of first arm wheel links to each other through first connecting piece, the second connecting piece is fixed in on the flexible arm of second, first connecting piece and second connecting piece can carry out fixed connection.

3. The telescopic arm of crane as claimed in claim 2, wherein one end of the first jib rope is fixed to the top end of the basic arm, and the other end of the first jib rope is connected to the first connecting member by passing around the first jib wheel;

one end of the first arm retracting rope is fixed at the bottom end of the basic arm, and the other end of the first arm retracting rope is wound through the first arm retracting wheel to be connected with the first connecting piece;

the second connecting piece is fixed on the tail part of the second telescopic arm.

4. The telescopic crane jib according to claim 3 wherein said first link member and said second link member are provided with pin holes, said first link member and said second link member being connectable by a pin.

5. The telescopic arm of a crane as claimed in claim 2, wherein the rod end of the piston rod of the primary telescopic cylinder is connected to the bottom end of the first telescopic arm, and the cylinder barrel of the primary telescopic cylinder is connected to the bottom end of the second telescopic arm.

6. The telescopic crane jib according to claim 5 wherein the rod end of said piston rod is hinged to said first telescopic jib by a pin.

7. The telescopic crane boom of claim 5, wherein the set of telescopic booms further comprises a third telescopic boom and a fourth telescopic boom, the rope aligning mechanism further comprises a second telescopic boom rope assembly, a third telescopic boom rope assembly, a second telescopic boom rope assembly and a third telescopic boom rope assembly,

the second stretches out the arm rope subassembly with the second contracts the arm rope subassembly set up in first flexible arm with between the flexible arm of third, the third stretch out the arm rope subassembly with the third contracts the arm rope subassembly set up in the second flexible arm with between the flexible arm of fourth.

8. The telescopic arm of crane as claimed in claim 7, wherein the second boom rope assembly comprises a second boom wheel and a second boom rope, the second boom wheel is fixed to the end of the cylinder, one end of the second boom rope is fixed to the first telescopic arm, and the other end of the second boom rope is fixed to the third telescopic arm by passing around the second boom wheel;

the third boom rope assembly comprises a third boom wheel and a third boom rope, the third boom wheel is fixed at the top end of the third telescopic boom, one end of the third boom rope is fixed on the second telescopic boom, and the other end of the third boom rope is fixed on the fourth telescopic boom by passing through the third boom wheel;

the second arm retracting rope assembly comprises a second arm retracting wheel and a second arm retracting rope, the second arm retracting wheel is fixed at the bottom end of the second telescopic arm, one end of the second arm retracting rope is fixed on the first telescopic arm, and the other end of the second arm retracting rope is fixed on the third telescopic arm by winding the second arm retracting wheel;

the third arm retracting rope assembly comprises a third arm retracting wheel and a third arm retracting rope, the third arm retracting wheel is fixed at the bottom end of the third telescopic arm, one end of the third arm retracting rope is fixed at the end part of the cylinder barrel, and the other end of the third arm retracting rope is fixed on the fourth telescopic arm by passing through the third arm retracting wheel.

9. The telescopic arm of crane as claimed in claim 8, wherein one end of the first jib rope is fixed to the top end of the basic arm, and the other end of the first jib rope is connected to the first connecting member by passing around the first jib wheel;

one end of the second boom extension rope is fixed at the bottom end of the first telescopic boom, and the other end of the second boom extension rope is fixed at the bottom end of the third telescopic boom by winding the second boom extension wheel;

one end of the third boom extension rope is fixed at the bottom end of the second telescopic boom, and the other end of the third boom extension rope is fixed at the bottom end of the fourth telescopic boom by winding the third boom extension wheel;

one end of the first arm retracting rope is fixed at the bottom end of the basic arm, and the other end of the first arm retracting rope is wound through the first arm retracting wheel to be connected with the first connecting piece;

one end of the second arm retracting rope is fixed at the top end of the first telescopic arm, and the other end of the second arm retracting rope is fixed at the bottom end of the third telescopic arm by winding the second arm retracting wheel;

one end of the third arm retracting rope is fixed to the top end of the cylinder barrel, and the other end of the third arm retracting rope is fixed to the top end of the fourth telescopic arm through the third arm retracting wheel in a winding mode.

10. A crane, comprising:

a telescopic arm as claimed in any one of claims 1 to 9, and

the crane comprises a machine body, and the telescopic arm of the crane is mounted on the machine body.

Technical Field

The invention relates to the technical field of cranes, in particular to a telescopic boom of a crane and the crane.

Background

The crane boom is a core component of the crane and is the most important bearing structural member in the hoisting operation of the crane; the weight, strength, rigidity, telescopic efficiency and stable and reliable operation of the crane boom directly affect the service performance of the automobile crane product. Through the technical innovation of the crane boom, the purposes of improving the lifting capacity, the lifting height capacity, the lifting distance capacity and the telescopic efficiency of the crane boom are continuously pursued by various crane manufacturers.

At present, a boom extension mechanism of a product occupying most of the market of cranes adopts a form of adding a rope row to a cylinder, as shown in fig. 1, the boom extension mechanism comprises a first knuckle arm 01, a second knuckle arm 02, a third knuckle arm 03, a fourth knuckle arm 04, a fifth knuckle arm 05, a first telescopic cylinder 06, a second telescopic cylinder 07, a first arm contraction rope 08, a second arm contraction rope 09, a first arm contraction wheel 10, a second arm contraction wheel 11, a first arm extension rope 12, a second arm extension rope 13, a first arm extension wheel 14 and a second arm extension wheel 15, the first telescopic cylinder 06 drives the second knuckle arm 02 to realize extension, and the second telescopic cylinder 07 drives the third knuckle arm 03, the fourth knuckle arm 04 and the fifth knuckle arm 05 to realize simultaneous and synchronous extension. Two primary telescopic oil cylinders are arranged in a telescopic arm of the mechanism, so that the inner structure of the telescopic arm is complex and the self weight is large.

And because the crane boom is a variable cross-section cantilever beam structure, the hoisting weight can be reduced along with the extension of the boom length, but the cross sections of the rope row and the oil cylinder do not change along with the extension of the boom length, however, in practical application, when an object with smaller weight is hoisted by the middle and long boom, the crane can meet the hoisting requirement only by smaller bearing capacity of the rope row and the oil cylinder.

Disclosure of Invention

In order to solve the technical problems, the invention provides a telescopic arm of a crane, which realizes synchronous telescopic of the telescopic arm of the crane by using only one primary telescopic oil cylinder, reduces the dead weight of the telescopic arm of the crane and simplifies the internal structure of the telescopic arm of the crane.

In order to solve the technical problems, the invention also provides a crane using the telescopic arm of the crane provided by the first purpose, and the telescopic arm of the crane provided by the invention has light weight and only uses one primary telescopic oil cylinder, so that the power output of the crane in the hoisting process is reduced, the energy consumption is reduced, the weight of the crane is reduced, and the oil consumption of the crane in the running process is reduced.

In order to achieve the purpose, the telescopic arm of the crane provided by the invention comprises a basic arm, a primary telescopic oil cylinder and a telescopic arm group sleeved in the basic arm, wherein the primary telescopic oil cylinder is arranged in the telescopic arm group and is used for driving the telescopic arm group to stretch.

As a further improvement of the above technical solution:

the telescopic arm of the crane further comprises a rope row mechanism, a first connecting piece and a second connecting piece, wherein the rope row mechanism comprises a first arm extending rope assembly and a first arm retracting rope assembly, and the telescopic arm group comprises a first telescopic arm and a second telescopic arm;

first outrigger rope subassembly includes first outrigger wheel and the first arm rope that stretches, first arm rope subassembly that contracts includes first arm wheel and the first arm rope that contracts, first outrigger wheel is fixed in the bottom of first flexible arm, first arm wheel that contracts is fixed in the top of first flexible arm, first arm rope that stretches with the one end of first arm rope that contracts is fixed in on the basic arm, the other end warp of first arm rope first outrigger wheel with the warp of first arm rope that contracts the other end of first arm wheel links to each other through first connecting piece, the second connecting piece is fixed in on the flexible arm of second, first connecting piece and second connecting piece can carry out fixed connection.

In the telescopic arm of the crane, one end of the first arm extending rope is fixed at the top end of the basic arm, and the other end of the first arm extending rope is wound around the first arm extending wheel and connected with the first connecting piece;

one end of the first arm retracting rope is fixed at the bottom end of the basic arm, and the other end of the first arm retracting rope is wound through the first arm retracting wheel to be connected with the first connecting piece;

the second connecting piece is fixed on the tail part of the second telescopic arm.

The telescopic arm of the crane is characterized in that the first connecting piece and the second connecting piece are both provided with pin holes, and the first connecting piece and the second connecting piece can be connected through pin shafts.

The telescopic arm of the crane further comprises a rod end of a piston rod of the first-stage telescopic oil cylinder connected to the bottom end of the first telescopic arm, and a cylinder barrel of the first-stage telescopic oil cylinder connected to the bottom end of the second telescopic arm.

The telescopic arm of the crane further comprises a rod end of the piston rod hinged to the first telescopic arm through a pin shaft.

In the telescopic arm of the crane, the telescopic arm group further comprises a third telescopic arm and a fourth telescopic arm, and the rope arranging mechanism further comprises a second telescopic arm rope assembly, a third telescopic arm rope assembly, a second telescopic arm rope assembly and a third telescopic arm rope assembly;

the second stretches out the arm rope subassembly with the second contracts the arm rope subassembly set up in first flexible arm with between the flexible arm of third, the third stretch out the arm rope subassembly with the third contracts the arm rope subassembly set up in the second flexible arm with between the flexible arm of fourth.

In the telescopic boom of the crane, the second boom rope assembly comprises a second boom wheel and a second boom rope, the second boom wheel is fixed at the end of the cylinder, one end of the second boom rope is fixed on the first telescopic boom, and the other end of the second boom rope is fixed on the third telescopic boom by passing through the second boom wheel;

the third boom rope assembly comprises a third boom wheel and a third boom rope, the third boom wheel is fixed at the top end of the third telescopic boom, one end of the third boom rope is fixed on the second telescopic boom, and the other end of the third boom rope is fixed on the fourth telescopic boom by passing through the third boom wheel;

the second arm retracting rope assembly comprises a second arm retracting wheel and a second arm retracting rope, the second arm retracting wheel is fixed at the bottom end of the second telescopic arm, one end of the second arm retracting rope is fixed on the first telescopic arm, and the other end of the second arm retracting rope is fixed on the third telescopic arm by winding the second arm retracting wheel;

the third arm retracting rope assembly comprises a third arm retracting wheel and a third arm retracting rope, the third arm retracting wheel is fixed at the bottom end of the third telescopic arm, one end of the third arm retracting rope is fixed at the end part of the cylinder barrel, and the other end of the third arm retracting rope is fixed on the fourth telescopic arm by passing through the third arm retracting wheel.

In the telescopic arm of the crane, one end of the first arm extending rope is fixed at the top end of the basic arm, and the other end of the first arm extending rope is wound around the first arm extending wheel and connected with the first connecting piece;

one end of the second telescopic arm rope is fixed at the bottom end of the first telescopic arm, and the other end of the second telescopic arm rope is fixed at the bottom end of the third telescopic arm by winding the second telescopic arm wheel;

one end of the third boom extension rope is fixed at the bottom end of the second telescopic boom, and the other end of the third boom extension rope is fixed at the bottom end of the fourth telescopic boom by winding the third boom extension wheel;

one end of the first arm retracting rope is fixed at the bottom end of the basic arm, and the other end of the first arm retracting rope is wound through the first arm retracting wheel to be connected with the first connecting piece;

one end of the second arm retracting rope is fixed at the top end of the first telescopic arm, and the other end of the second arm retracting rope is fixed at the bottom end of the third telescopic arm by winding the second arm retracting wheel;

one end of the third arm retracting rope is fixed to the top end of the cylinder barrel, and the other end of the third arm retracting rope is fixed to the top end of the fourth telescopic arm through the third arm retracting wheel in a winding mode.

To achieve the above object, the present invention also provides a crane, comprising:

the telescopic arm of the crane, and

the crane comprises a machine body, wherein the telescopic arm of the crane is mounted on the machine body.

The invention has the beneficial effects that:

the telescopic arm of the crane comprises a basic arm, a telescopic oil cylinder and a telescopic arm group sleeved in the basic arm, wherein the telescopic oil cylinder is a primary telescopic oil cylinder which is arranged in the telescopic arm group and used for driving the telescopic arm group to stretch. The telescopic arm of the crane only uses one-level telescopic oil cylinder to realize synchronous telescopic of the telescopic arm of the crane, the dead weight of the telescopic arm of the crane is reduced, the internal structure of the telescopic arm of the crane is simplified, the whole telescopic process can be kept to be high in stability and reliability, the problems that a plurality of one-level telescopic oil cylinders and pipelines thereof are inconvenient to install and maintain and high in cost can be avoided, the telescopic arm of the crane is relatively simple in structure, and the crane is more reliable in operation.

The invention also provides a crane, which comprises the crane telescopic arm and a crane body, wherein the crane telescopic arm is arranged on the crane body. Because the telescopic arm of the crane provided by the application has light weight, and only one primary telescopic oil cylinder is used, the power output of the crane in the hoisting process is reduced, so that the energy consumption is reduced, the weight of the crane is reduced, and the oil consumption of the crane in the running process is reduced.

In summary, the crane telescopic boom and the crane of the present invention have the advantages and practical values, and are innovative in similar products without similar methods disclosed or used, thereby producing a practical and useful effect.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 shows a schematic diagram of a telescopic boom of a crane in the prior art;

FIG. 2 shows a schematic structural diagram of a telescopic boom of a crane according to an embodiment of the invention;

FIG. 3 is a schematic structural view of the telescopic boom of the crane according to the embodiment of the invention when the second telescopic boom, the third telescopic boom and the fourth telescopic boom are extended;

fig. 4 shows a schematic structural diagram of the crane telescopic boom according to the embodiment of the invention when the first telescopic boom, the second telescopic boom, the third telescopic boom and the fourth telescopic boom are extended.

Description of the main element symbols:

01-first jointed arm 01; 02-second arm; 03-third arm; 04-fourth arm section; 05-fifth arm section; 06-a first telescopic cylinder; 07-a second telescoping cylinder; 08-first boom retraction cord; 09-a second arm retracting rope; 10-a first arm retracting wheel; 11-a second arm retracting wheel; 12-a first arm-extending rope; 13-a second arm-extending rope; 14-a first arm-extending wheel; 15-a second arm extending wheel;

100-a base arm; 200-a first telescopic arm; 300-a second telescopic arm; 400-a third telescopic arm; 500-a fourth telescoping arm; 600-first-stage telescopic oil cylinder; 610-a piston rod; 620-cylinder; 630-a bracket; 700-rope arrangement mechanism; 710-a first boom cord assembly; 711-a first arm-extending wheel; 712-a first boom cord; 720-a second boom cord assembly; 721-a second boom wheel; 722-a second arm extension cord; 730-a third boom cord assembly; 731-third arm-extending wheel; 732-a third arm-extending rope; 740-a first boom retraction cord assembly; 741-a first boom wheel; 742-a first boom retraction cord; 750-a second boom retraction cord assembly; 751-a second arm retracting wheel; 752-second boom retraction cord; 760-a third boom retraction cord assembly; 761-third boom retraction wheel; 762-third boom retraction cord; 800-a first connector; 900-a second connector; 1000-pin shaft.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "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 are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the 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 one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

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

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. 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.