CN218988636U

CN218988636U - Rear pull rod fine adjustment device of crane and rear triangle mechanism of crane

Info

Publication number: CN218988636U
Application number: CN202320146956.7U
Authority: CN
Inventors: 闵理; 高峰; 彭双能; 蓝翔; 张延辉; 夏朝鹃; 郑奕; 杨志明; 黄行裕; 赵梦春; 李勇刚; 王效知
Original assignee: China Railway Jiujiang Bridge Engineering Co Ltd
Current assignee: China Railway Jiujiang Bridge Engineering Co Ltd
Priority date: 2023-02-08
Filing date: 2023-02-08
Publication date: 2023-05-09
Anticipated expiration: 2033-02-08

Abstract

The utility model discloses a rear pull rod fine adjustment device of a crane and a rear triangular mechanism of the crane, and relates to the technical field of crane equipment. According to the utility model, the rear pull rod is driven to be adjusted through the eccentric shaft sleeve, and the stepless adjustment of the rotating position of the eccentric shaft sleeve is realized by utilizing the bolt holes and the waist-shaped circular arc holes, so that the linear fine adjustment of the rear pull rod can be realized through the stepless rotation of the eccentric shaft sleeve within the design range.

Description

Rear pull rod fine adjustment device of crane and rear triangle mechanism of crane

Technical Field

The utility model relates to the technical field of crane equipment, in particular to a rear pull rod fine-tuning device of a crane and a rear triangle mechanism of the crane.

Background

The linearity of the traditional rear triangle mechanism of the crane is fixed after being manufactured and assembled in a factory, the site working condition is required to adapt to the linearity of the crane, the crane is difficult to adapt to the site working condition change well, and the crane cannot be adjusted according to the site working condition. At present, common ways of adjusting the length of the pull rod are in the form of turnbuckle screws or bolt jackscrews, and the ways can be adopted in occasions with low bearing capacity requirements, but the rated lifting capacity of the crane is up to more than 1000 tons, so that the weight and the size of a corresponding rod piece of the crane are very large, and the difficulty is increased in field installation and adjustment. And therefore conventional adjustment is not applicable.

There are also some prior art techniques that take into account on-site adjustments in advance, but, to ensure stability, are generally limited to fixed adjustment values preset by the factory. For example, chinese patent publication No. CN209583425U discloses a tower crane comprising a tie rod, a girder; the two hinge support plates at the end part of the pull rod are respectively provided with a first hinge hole and a second hinge hole; the end part of the girder is provided with a girder hinge hole; the eccentric shaft comprises a spanner connecting part, a first pull rod connecting part, a girder connecting part and a second pull rod connecting part; the spanner connecting part, the first pull rod connecting part and the second pull rod connecting part are coaxially arranged; the central axis of the first pull rod connecting part is not collinear with the central axis of the girder connecting part; the first pull rod connecting portion is rotationally connected with the first hinge hole, the girder connecting portion is rotationally connected with the girder hinge hole, and the second pull rod connecting portion is rotationally connected with the second hinge hole. According to the scheme, through the structure provided with the eccentric shaft, when the eccentric shaft rotates, the rotation of the girder connecting part causes the central position of the girder hinging hole to change, and the length of the pull rod is indirectly adjusted by adjusting the change of the central position of the girder end hinging hole. However, the adjustment must be performed after aligning the bolt holes, which results in a non-linear adjustment of the length of the tie rod and an inability to precisely adjust the length of the tie rod.

Therefore, how to adapt to the linear adjustment of the self working condition change of the crane and the linear adjustment of the external environment change, and the field adaptation capability of the lifting crane are technical problems really faced by the person skilled in the art.

Disclosure of Invention

The utility model aims to provide a crane rear pull rod fine adjustment device and a crane rear triangle mechanism thereof, which are used for solving the problems in the prior art, and can drive a rear pull rod to adjust through rotation of an eccentric shaft sleeve, and simultaneously realize stepless adjustment and locking of the rotation position of the eccentric shaft sleeve by utilizing the matching of a bolt hole and a waist-shaped circular arc hole, so that linear fine adjustment of the rear pull rod can be realized through stepless rotation of the eccentric shaft sleeve within a design range.

In order to achieve the above object, the present utility model provides the following solutions:

the utility model provides a fine adjustment device for a rear pull rod of a crane, which comprises an eccentric shaft sleeve arranged on a connecting seat, wherein the eccentric shaft sleeve comprises a cylindrical body and an annular flange connected to the end part of the cylindrical body, the cylindrical body is provided with an eccentric shaft hole for connecting the rear pull rod, the annular flange is provided with a plurality of waist-shaped circular arc holes on a circular track coaxial with the cylindrical body, the connecting seat is provided with a mounting hole rotationally sleeved with the cylindrical body, the circular track coaxial with the mounting hole is provided with a plurality of bolt holes on the circumference of the mounting hole, the waist-shaped circular arc holes correspond to at least one bolt hole, and a locking bolt penetrates through the waist-shaped circular arc holes and is in threaded connection with the bolt holes.

Preferably, the eccentric shaft holes are eccentrically arranged along the direction of a perpendicular bisector between two adjacent waist-shaped circular arc holes.

Preferably, the waist-shaped circular arc holes are arranged in four in the circumferential direction, and the bolt holes are uniformly arranged in eight in the circumferential direction.

Preferably, the deflection angle of the waist-shaped circular arc hole is 60 degrees.

Preferably, the adjustable wrench further comprises an adjusting wrench, the shape of the inner ring of the adjusting wrench is matched with the shape of the outer ring of the annular flange, and the outer ring of the annular flange is provided with a plurality of protrusions.

Preferably, eight protrusions are uniformly arranged along the circumferential direction, part of the protrusions are located between the adjacent waist-shaped circular arc holes, and part of the protrusions are located on the outer side of the waist-shaped circular arc holes in the radial direction.

Preferably, the contact surface of the annular flange and the connecting seat is provided with an anti-slip structure.

The utility model also provides a crane rear triangle mechanism which comprises a connecting seat, the crane rear pull rod fine adjustment device and a rear pull rod, wherein one end of the rear pull rod is hinged on a support column, the other end of the rear pull rod is provided with a traction shaft, and the traction shaft is sleeved in the eccentric shaft hole.

Preferably, the connecting seat is provided with a plurality of mounting holes, the rear pull rod comprises a pull rod body, an extension joint and a connecting end which can be connected in sequence, the connecting end is provided with a traction shaft, the rear pull rod combined with the extension joint is connected in the mounting holes far away from the support column through the traction shaft, and the rear pull rod removed from the extension joint is connected in the mounting holes close to the support column through the traction shaft.

Preferably, a plurality of ear plates are arranged on the connecting seat, and the mounting holes are formed in the ear plates.

Compared with the prior art, the utility model has the following technical effects:

(1) According to the utility model, the rear pull rod can be driven to adjust through the rotation of the eccentric shaft sleeve, and meanwhile, the stepless adjustment and locking of the rotation position of the eccentric shaft sleeve can be realized by utilizing the matching of the bolt hole and the waist-shaped circular arc hole, so that the linear fine adjustment of the rear pull rod can be realized through the stepless rotation of the eccentric shaft sleeve within the design range;

(2) The rear pull rod has the advantages that the fine adjustment function is realized, the positioning and the installation of the rear pull rod are greatly facilitated, and various errors caused by working condition installation and replacement and on-site environment change can be well adapted;

(3) According to the utility model, the outer ring of the annular flange is connected through the adjusting spanner, so that the eccentric shaft sleeve is rotated, and the diameter of the cylindrical body is smaller than that of the annular flange, so that when the adjusting spanner is used for applying force to the annular flange, the torque can be further increased, and the rotating adjustment is facilitated.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of the field installation of the present utility model;

FIG. 2 is an enlarged schematic view of the fine tuning device shown in FIG. 1;

FIG. 3 is a diagram of a second embodiment of the present utility model;

FIG. 4 is an enlarged schematic view of the fine tuning device shown in FIG. 3;

FIG. 5 is a schematic cross-sectional view of an eccentric sleeve according to the present utility model;

FIG. 6 is a schematic diagram of the front structure of an eccentric sleeve according to the present utility model;

FIG. 7 is a schematic view of a connecting seat at the position of an eccentric shaft sleeve according to the utility model;

FIG. 8 is a schematic view of a first rotary adjustment of an eccentric sleeve according to the present utility model;

FIG. 9 is a schematic view of a second rotary adjustment of the eccentric sleeve of the present utility model;

FIG. 10 is a schematic view of a third rotary adjustment of an eccentric sleeve according to the present utility model;

FIG. 11 is a schematic view of the structure of the adjusting wrench of the present utility model;

FIG. 12 is a schematic view of FIG. 11 after being sleeved on an eccentric sleeve;

wherein, 1, the pull rod body; 2. a lengthening section; 3. a connection end; 4. an eccentric shaft sleeve; 41. a cylindrical body; 42. an annular flange; 43. eccentric shaft holes; 44. waist-shaped circular arc holes; 45. a protrusion; 5. a connecting seat; 51. bolt holes; 52. a mounting hole; 6. adjusting a wrench; 7. a support column; 8. a cross bar; 9. and (5) a traction shaft.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

The utility model aims to provide a crane rear pull rod fine adjustment device and a crane rear triangle mechanism thereof, which are used for solving the problems in the prior art, and can drive a rear pull rod to adjust through rotation of an eccentric shaft sleeve, and simultaneously realize stepless adjustment and locking of the rotation position of the eccentric shaft sleeve by utilizing the matching of a bolt hole and a waist-shaped circular arc hole, so that linear fine adjustment of the rear pull rod can be realized through stepless rotation of the eccentric shaft sleeve within the design range.

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.

As shown in fig. 1 to 12, the utility model provides a fine tuning device for a rear pull rod of a crane, which comprises an eccentric shaft sleeve 4 arranged on a connecting seat 5. The eccentric sleeve 4 comprises a cylindrical body 41 and an annular flange 42 connected to the end of the cylindrical body 41, wherein an eccentric shaft hole 43 for connecting a rear pull rod is arranged on the cylindrical body 41, and the eccentric value is a, so that the adjustment can be realized within the range of +/-a. Specifically, a traction shaft 9 perpendicular to the rear pull rod is arranged at the end of the rear pull rod, the traction shaft 9 is sleeved in an eccentric shaft hole 43 to realize connection, a plurality of waist-shaped circular arc holes 44 are arranged on a circular track coaxial with the cylindrical body 41 (referred to as an outer diameter here), namely, the central axis of the waist-shaped circular arc holes 44 is coaxial with the central axis of the cylindrical body 41 (the outer diameter), and eccentric with the central axis of the eccentric shaft hole 43 (the inner diameter of the cylindrical body 41), when the cylindrical body 41 rotates, the eccentric shaft hole 43 rotates along with the rotation to form a cam-like structure, and the rear pull rod can be driven to move, so that the position of the rear pull rod can be adjusted. The connecting seat 5 is provided with a mounting hole 52, the cylindrical body 41 is rotatably sleeved in the mounting hole 52, the eccentric shaft sleeve 4 can rotate relative to the connecting seat 5, and the position of the rear pull rod is adjusted. The connecting seat 5 is provided with a plurality of bolt holes 51 on a circular track concentric with the mounting hole 52 and the circumference of the mounting hole 52, after the cylindrical body 41 is mounted in the mounting hole 52, the waist-shaped circular arc hole 44 on the annular flange 42 can correspond to at least one bolt hole 51 in the process of relative rotation, and a locking bolt penetrates through the waist-shaped circular arc hole 44 and is connected in the bolt hole 51 in a threaded manner, so that the annular flange 42 is locked and fixed on the connecting seat 5. According to the utility model, the rear pull rod can be driven to adjust through the rotation of the eccentric shaft sleeve 4, and meanwhile, the stepless adjustment and locking of the rotation position of the eccentric shaft sleeve 4 can be realized through the cooperation of the bolt hole 51 and the waist-shaped circular arc hole 44, so that the linear fine adjustment of the rear pull rod can be realized through the stepless rotation of the eccentric shaft sleeve 4 within the design range.

As shown in fig. 6, the eccentric shaft holes 43 may be eccentrically provided in the direction of the perpendicular bisector between the adjacent two waist-shaped circular arc holes 44. When the eccentric position is close to the rear pull rod, the relative distance between the rear pull rod and the connecting seat 5 is farthest, when the eccentric position is far away from the rear pull rod, the relative distance between the rear pull rod and the connecting seat 5 is nearest, and when the position between the nearest and farthest positions is rotated, the adjustment of the rear pull rod from far to near or from near to far can be realized.

As shown in fig. 6, four waist-shaped circular arc holes 44 may be provided in the circumferential direction, and a support structure is formed at a portion between adjacent waist-shaped circular arc holes 44, so that structural rigidity of the annular flange 42 is ensured, eight bolt holes 51 on the connecting seat 5 may be uniformly provided in the circumferential direction, and one or two bolt holes 51 may be corresponding when the waist-shaped circular arc holes 44 rotate relative to the bolt holes 51 (as shown in fig. 8 to 10).

As shown in fig. 6, the deflection angle of the waist-shaped circular arc hole 44 is b °, and b ° may be set to 60 °, which can ensure that 4 to 8 locking bolts are connected at any angular position of the waist-shaped circular arc hole 44 within the rotation range, and four or more locking bolts can meet the connection strength requirement according to the design parameters.

As shown in fig. 11 to 12, the eccentric shaft sleeve 4 is further provided with an adjusting spanner 6, the adjusting spanner 6 is provided with a handle portion and a connecting portion, the shape of the inner ring of the connecting portion is matched with the shape of the outer ring of the annular flange 42, the outer ring of the annular flange 42 is provided with a plurality of protrusions 45, and the adjusting spanner 6 is sleeved on the annular flange 42 and rotates the handle portion, so that the eccentric shaft sleeve 4 can be easily rotated.

As shown in fig. 6, eight protrusions 45 may be uniformly arranged along the circumferential direction, a part of the protrusions 45 are located between the adjacent waist-shaped circular arc holes 44, and a part of the protrusions 45 are located at the radial outer sides of the waist-shaped circular arc holes 44.

The contact surface between the annular flange 42 and the connecting seat 5 can be further provided with an anti-slip structure, and the anti-slip structure can be an anti-slip coating, anti-slip lines and the like, so that enough static friction force between the annular flange 42 and the connecting seat 5 can be ensured when the locking bolt is screwed, and deflection of the eccentric shaft sleeve 4 is avoided.

As shown in fig. 1 to 4, the utility model further provides a rear triangle mechanism of a crane, which comprises a connecting seat 5, a rear pull rod fine adjustment device of the crane and a rear pull rod, wherein one end of the rear pull rod is hinged on a support column 7, the other end of the rear pull rod is provided with a traction shaft 9, the traction shaft 9 is sleeved and installed in an eccentric shaft hole 43, the connecting seat 5 is installed at one end of a cross rod 8, the other end of the cross rod 8 is connected with the support column 7, and the support column 7, the rear pull rod and the cross rod 8 form a triangle. The linear adjustment of the rear pull rod can be realized by rotating the eccentric shaft sleeve 4 through the adjusting spanner 6. The included angle between the rear pull rod and the support column 7 can be changed by adjusting the connection position of the rear pull rod, so that the triangular shape is changed.

As shown in fig. 1 to 4, the connecting seat 5 may be provided with a plurality of mounting holes 52, and may be connected to different mounting holes 52 when the mounting position of the rear tie rod is adjusted. The rear pull rod comprises a pull rod body 1, an extension joint 2 and a connecting end 3 which can be connected in sequence, the pull rod body 1 can be directly connected with the connecting end 3 after the extension joint 2 is removed, and the connecting end 3 is provided with a traction shaft 9. The rear pull rod of the combined extension joint 2 is connected in a mounting hole 52 far away from the support column 7 through a traction shaft 9 (shown in fig. 1 and 2), and the rear pull rod of the combined extension joint 2 is connected in a mounting hole 52 near the support column 7 through the traction shaft 9 (shown in fig. 3 and 4). After each position adjustment, the position of the rear pull rod can be finely adjusted by rotating the eccentric shaft sleeve 4. Therefore, the utility model not only can well complete the convenient adjustment of the self working condition installation and replacement of the equipment, but also can better adapt to various errors caused by the working condition installation and replacement and the field environment change.

As shown in fig. 1 to 4, the connecting base 5 may be provided with a plurality of ear plates, and the mounting holes 52 are provided on the ear plates.

The traditional crane rear pull rod does not have an adjusting function, the corresponding linearity is fixed, the linearity of a field installation site is changed frequently, a great amount of manpower and material resources are required to be spent for adapting to the field change during the field installation of the crane, so that the installation of the crane is completed, and the rear pull rod is required to be adjusted in installation position and length in the use process of the crane field. The utility model well solves the problems of on-site installation and linear adjustment of the installation and replacement working conditions of the large crane, can well adapt to various errors caused by working condition conversion, and can rapidly and conveniently complete the working condition installation and replacement.

The principles and embodiments of the present utility model have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present utility model; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.

Claims

1. A rear pull rod fine adjustment device of a crane is characterized in that: including setting up the eccentric shaft sleeve on the connecting seat, the eccentric shaft sleeve includes the tube-shape body and connects the annular flange of tube-shape body tip, be provided with the eccentric shaft hole that is used for connecting the back pull rod on the tube-shape body, on the annular flange with be provided with a plurality of waist type circular arc holes on the circular orbit of tube-shape body coaxial, set up the rotation cover on the connecting seat and establish the mounting hole of tube-shape body, the border of mounting hole with be provided with a plurality of bolt holes on the circular orbit of mounting hole coaxial, waist type circular arc hole corresponds at least one the bolt hole, the lock bolt runs through waist type circular arc hole and threaded connection are in the bolt hole.

2. The rear drawbar fine tuning device of the crane according to claim 1, wherein: the eccentric shaft holes are eccentrically arranged along the direction of the perpendicular bisectors between the two adjacent waist-shaped arc holes.

3. The rear drawbar fine tuning device of the crane according to claim 2, wherein: the waist-shaped arc holes are formed in four in the circumferential direction, and eight bolt holes are uniformly formed in the circumferential direction.

4. A rear drawbar fine tuning device according to claim 3, wherein: the deflection angle of the waist-shaped circular arc hole is 60 degrees.

5. The rear drawbar fine tuning device of a crane according to claim 3 or 4, wherein: the adjustable wrench is characterized by further comprising an adjusting wrench, wherein the shape of an inner ring of the adjusting wrench is matched with the shape of an outer ring of the annular flange, and a plurality of protrusions are arranged on the outer ring of the annular flange.

6. The rear drawbar fine tuning device of the crane according to claim 5, wherein: eight protrusions are uniformly arranged along the circumferential direction, part of the protrusions are located between the adjacent waist-shaped circular arc holes, and part of the protrusions are located on the radial outer sides of the waist-shaped circular arc holes.

7. The rear drawbar fine tuning device of the crane according to claim 1, wherein: the contact surface of the annular flange and the connecting seat is provided with an anti-slip structure.

8. A rear triangle mechanism of a crane is characterized in that: comprising a connecting seat, a crane rear pull rod fine tuning device as claimed in any one of claims 1-7 and a rear pull rod, wherein one end of the rear pull rod is hinged on a support column, the other end of the rear pull rod is provided with a traction shaft, and the traction shaft is sleeved in the eccentric shaft hole.

9. The rear triangle of crane of claim 8, wherein: be provided with a plurality of on the connecting seat the mounting hole, back pull rod is including the pull rod body, link and the extension section that can connect in order, the link is provided with the traction shaft, the combination the extension section back pull rod passes through the traction shaft connects keep away from in the mounting hole of support column, get rid of the extension section back pull rod passes through the traction shaft connects being close to in the mounting hole of support column.

10. The rear triangle of crane of claim 8, wherein: the connecting seat is provided with a plurality of lug plates, and the mounting holes are formed in the lug plates.