CN220485171U - Telescopic arm assembly and sliding block - Google Patents

Abstract

The application discloses flexible arm assembly and slider, the slider is installed on outer cantilever crane or interior cantilever crane to be used for in-process of interior cantilever crane for outer cantilever crane concertina movement, play the effect of location and support interior cantilever crane. The sliding block comprises a wear-resistant layer and an elastic layer, wherein the wear-resistant layer is used for being in contact with the outer arm support or the inner arm support, the elastic layer is connected with the wear-resistant layer, and the elastic layer is used for generating elastic deformation after the wear-resistant layer is extruded by the outer arm support or the inner arm support. The gap between the sliding block and the arm support can be reserved more conveniently, when the gap is too small and the sliding block is extruded by the arm support, elastic deformation capacity of the sliding block can be utilized to cope with the shaking of the arm support caused by too large gap in the movement process of equipment, so that the inner arm support can slide stably relative to the outer arm support, meanwhile, the service life of the sliding block can be prolonged by more than 2 times, in addition, the defect of manufacturing precision of the arm support can be compensated by adopting the setting mode, thereby reducing the requirement on the processing precision of the arm support and reducing the processing difficulty and the processing cost.

Description

Telescopic arm assembly and sliding block

Technical Field

The application relates to the technical field of telescopic arms, in particular to a sliding block. The application also relates to a telescopic arm assembly with the sliding block.

Background

In the overhead working equipment, the telescopic arm assembly is a core component and consists of an arm support, a sliding block, a telescopic oil cylinder, a telescopic steel wire rope/chain and other components, and the working range of the working platform can be effectively expanded through the telescopic of the arm support.

In the prior art, in order to ensure smooth movement of the arm support, the clearance between the sliding block and the arm support is required to be controlled to be 1-2mm. However, in the actual assembly process of the telescopic boom assembly, the control of the clearance of the sliding block is very difficult due to the shape deviation of the boom. For example, in order to meet the condition that the gap between a local sliding block and the arm support is far more than 2mm in the minimum position of the section of the arm support, the arm support is not effectively limited, and the shaking amount is increased in the amplitude variation action of the telescopic arm and the rotation process of the vehicle body, so that the control experience is affected.

Therefore, how to avoid the shaking of the arm frame when the equipment is operated due to the difficulty in controlling the gap between the sliding block and the arm frame is a technical problem which needs to be solved by the person skilled in the art at present.

Disclosure of Invention

The purpose of this application is to provide a slider, can solve the cantilever crane problem of rocking that leads to because of the clearance is inhomogeneous between the arm to promote the stability of cantilever crane during operation. It is another object of the present application to provide a telescoping arm assembly comprising the slider described above.

In order to achieve the above-mentioned purpose, the present application provides a slider for support the inner arm support when the inner arm support is relative to the outer arm support telescopic movement, in order to prevent the inner arm support from rocking, the slider includes:

the wear-resistant layer is used for contacting with the outer arm support or the inner arm support;

the elastic layer is connected with the wear-resistant layer and is used for generating elastic deformation after the wear-resistant layer is extruded by the outer arm support or the inner arm support.

In some embodiments, the wear layer is provided with a first connection structure and the elastic layer is provided with a second connection structure, and the detachable connection member cooperates with the first connection structure and the second connection structure to connect the wear layer with the elastic layer.

In some embodiments, the wear layer has a first bonding surface adjacent to one side of the resilient layer, and the resilient layer has a second bonding surface adjacent to one side of the wear layer, the first bonding surface being bonded to the second bonding surface to connect the wear layer to the resilient layer.

In some embodiments, the elastic layer is one or both of a rubber layer and a polyurethane layer.

In some embodiments, the telescopic arm further comprises a pivot portion, the elastic layer is rotatably connected to the outer arm support through the pivot portion, and an axis of the pivot portion is horizontally arranged and perpendicular to a telescopic direction of the inner arm support.

In some embodiments, the pivot is disposed in a shaft shape.

The application also provides a telescopic boom assembly, which comprises an outer boom, an inner boom capable of moving telescopically relative to the outer boom, and a sliding block arranged between the outer boom and the inner boom and according to any one of the above.

In some embodiments, the sliding blocks are arranged in two groups, the two groups of sliding blocks are arranged at intervals along the axial direction of the inner arm support, and any group of sliding blocks are arranged along the peripheral direction of the inner arm support.

Compared with the background art, the sliding block provided by the embodiment of the application is arranged on the outer arm support or the inner arm support and is used for positioning and supporting the inner arm support in the telescopic movement process of the inner arm support relative to the outer arm support, so that the inner arm support can slide stably relative to the outer arm support. Specifically, the sliding block comprises a wear-resistant layer and an elastic layer, wherein the wear-resistant layer is used for being in contact with the outer arm support or the inner arm support; the elastic layer is connected with the wear-resistant layer and is used for generating elastic deformation after the wear-resistant layer is extruded by the outer arm support or the inner arm support. It can be understood that when the sliding block is assembled, the sliding block can be arranged on the inner arm support or the outer arm support, when the sliding block is arranged on the inner arm support, the sliding block and the inner arm support synchronously stretch and retract, at the moment, the wear-resistant layer on the sliding block contacts the inner wall of the outer arm support, and the elastic layer is elastically deformed after being extruded by the outer arm support; when the sliding block is arranged on the outer arm support, the wear-resistant layer on the sliding block contacts the outer wall of the inner arm support when the inner arm support stretches and moves, and the elastic layer is elastically deformed after being extruded by the inner arm support. That is, the above arrangement can ensure a specific elastic deformation capability of the slider under the condition of bearing normal sliding friction. The sliding block adopting the setting mode has the following beneficial effects:

firstly, the gap between the sliding block and the arm support can be reserved more conveniently, for example, the gap between the sliding block and the arm support can be controlled in a smaller range (about 1 mm), when the gap is too small to enable the sliding block to be extruded by the arm support, the elastic deformation capacity of the sliding block can be utilized to cope with the gap, the arm support can be prevented from shaking due to the too large gap in the movement process of equipment, and therefore the inner arm support can be ensured to slide stably relative to the outer arm support.

Secondly, by utilizing the elastic deformation capability of the sliding block, the rigid friction between the sliding block and the arm support can be reduced, and meanwhile, the arrangement of the wear-resistant layer can prolong the service life of the sliding block by more than 2 times;

thirdly, as the sliding block can generate certain deformation after being extruded by external force, the defect of the manufacturing precision of the arm support can be compensated, thereby reducing the requirement on the processing precision of the arm support and reducing the processing difficulty and the processing cost.

Drawings

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

FIG. 1 is a schematic view of a slider according to an embodiment of the present application;

FIG. 2 is a cross-sectional view of A-A of the slider of FIG. 1;

FIG. 3 is a front view of a telescoping arm assembly according to an embodiment of the present application;

FIG. 4 is a side view of a telescoping arm assembly in an embodiment of the present application.

Wherein:

100-a slider, 101-a wear-resistant layer, 1011-a first connection structure, 1012-a first bonding surface, 102-an elastic layer, 1021-a second connection structure, 1022-a second bonding surface;

200-an inner arm support;

300-outer arm support.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

In order to better understand the aspects of the present application, a further detailed description of the present application will be provided below with reference to the accompanying drawings and detailed description.

The terms "upper end, lower end, left side, right side" and the like are defined based on the drawings of the specification.

Referring to fig. 1 to 4, fig. 1 is a schematic structural diagram of a slider according to an embodiment of the present application; FIG. 2 is a cross-sectional view of A-A of the slider of FIG. 1; FIG. 3 is a front view of a telescoping arm assembly according to an embodiment of the present application; FIG. 4 is a side view of a telescoping arm assembly in an embodiment of the present application.

The sliding block 100 provided in the embodiment of the present application is installed on the outer arm frame 300 or the inner arm frame 200, and is used for playing a role in positioning and supporting the inner arm frame 200 in the process of telescopic movement of the inner arm frame 200 relative to the outer arm frame 300, so as to prevent the inner arm frame 200 from shaking, and thus ensure that the inner arm frame 200 slides stably relative to the outer arm frame 300.

Specifically, the slider 100 includes a wear layer 101 and an elastic layer 102, wherein the wear layer 101 is used to contact the outer arm 300 or the inner arm 200; the elastic layer 102 is connected with the wear-resistant layer 101, and the elastic layer 102 is used for generating elastic deformation after the wear-resistant layer 101 is extruded by the outer arm rest 300 or the inner arm rest 200.

It can be understood that, during assembly, the sliding block 100 may be mounted on the inner arm frame 200 or the outer arm frame 300, when the sliding block 100 is mounted on the inner arm frame 200, the sliding block 100 and the inner arm frame 200 synchronously move in a telescopic manner, at this time, the wear-resistant layer 101 on the sliding block 100 contacts the inner wall of the outer arm frame 300, and the elastic layer 102 is elastically deformed after being extruded by the outer arm frame 300; when the sliding block 100 is mounted on the outer arm frame 300, the wear-resistant layer 101 on the sliding block 100 contacts the outer wall of the inner arm frame 200 when the inner arm frame 200 stretches and moves, and the elastic layer 102 is elastically deformed after being extruded by the inner arm frame 200. That is, the above arrangement ensures a certain elastic deformation capability of the slider 100 under the condition of normal sliding friction.

In this way, the clearance between the sliding block 100 and the outer arm rest 300 or the inner arm rest 200 can be more conveniently reserved by adopting the above arrangement mode, for example, the clearance between the sliding block 100 and the outer arm rest 300 or the inner arm rest 200 can be controlled within a smaller range (about 1 mm), when the clearance is too small to enable the sliding block 100 to be extruded by the outer arm rest 300 or the inner arm rest 200, elastic deformation capacity of the sliding block 100 can be utilized to cope with, shaking generated when the inner arm rest 200 stretches and contracts due to too large clearance in the equipment movement process can be avoided, and therefore stable sliding of the inner arm rest 200 relative to the outer arm rest 300 is ensured.

Meanwhile, by utilizing the elastic deformation capability of the sliding block 100, the rigid friction between the sliding block 100 and the arm support can be reduced, and meanwhile, the arrangement of the wear-resistant layer 101 can improve the service life of the sliding block 100 by more than 2 times.

In addition, the sliding block 100 can generate certain deformation after being extruded by external force, so that the defect of the manufacturing precision of the arm support can be compensated, the requirement on the processing precision of the arm support is reduced, and the processing difficulty and the processing cost are reduced.

In some embodiments, the wear layer 101 and the elastic layer 102 may be connected by a detachable connection, or may be connected by chemical bonding, so that the two structures are effectively bonded. The following is a detailed description.

In some embodiments, the slider 100 further includes a detachable connection member, the wear layer 101 is provided with a first connection structure 1011, and the elastic layer 102 is provided with a second connection structure 1021, and the detachable connection member cooperates with the first connection structure 1011 and the second connection structure 1021 to connect the wear layer 101 with the elastic layer 102.

Preferably, the detachable connection member may be a bolt, and the wear-resistant layer 101 and the elastic layer 102 are effectively fixed by using a bolting mode. Correspondingly, the wear-resistant layer 101 is provided with a receiving hole for receiving the bolt head, and the elastic layer 102 is provided with a threaded hole for threaded connection of the bolt shank.

Of course, according to actual needs, the detachable connection piece may also be a rivet, and the effective fixation of the wear-resistant layer 101 and the elastic layer 102 is achieved by using the rivet, and correspondingly, the first connection structure 1011 and the second connection structure 1021 are connection holes adapted to the rivet.

In some embodiments, the wear layer 101 has a first bonding surface 1012 adjacent to a side of the resilient layer 102, and the resilient layer 102 has a second bonding surface 1022 adjacent to a side of the wear layer 101, the first bonding surface 1012 being bonded to the second bonding surface 1022 to connect the wear layer 101 to the resilient layer 102.

In some embodiments, the elastic material may be selected to have compressible properties. For example, the elastic layer 102 may be one or both of a rubber layer and a polyurethane layer.

In some embodiments, the slider 100 further includes a pivot portion, through which the elastic layer 102 is rotatably connected to the outer arm frame 300, and an axis of the pivot portion is horizontally disposed and perpendicular to the telescopic direction of the inner arm frame 200.

In some embodiments, the pivot is disposed in a shaft shape.

It can be appreciated that when the slider 100 is mounted on the outer arm 300, the slider 100 in the present application is rotationally connected to the outer arm 300, i.e. the slider 100 has a rotation function, compared to the slider 100 being fixedly mounted on the outer arm 300. Specifically, the elastic layer 102 is provided with a rotation connection hole, which is adapted to the rotation shaft so that the slider 100 can rotate in the axial direction of the rotation shaft. Because the sliding block 100 can rotate, when the inner arm support 200 extends outwards from the outer arm support 300, deflection deformation can be generated under the conditions of external force and self gravity, at the moment, the sliding block 100 can automatically adjust the angle along with the deflection deformation direction of the inner arm support 200, when the inner arm support 200 retracts inwards, the deflection deformation gradually disappears, at the moment, the sliding block 100 can automatically adjust the angle along with the retraction direction of the inner arm support 200, and finally, the sliding block 100 is restored to an initial state, the effective contact area of the sliding block 100 and the inner arm support 200 is kept unchanged all the time in the whole telescopic process, the stress of the sliding block 100 cannot be excessively concentrated, and meanwhile, the sliding block 100 can elastically deform to a certain extent, so that the abrasion of the sliding block 100 can be reduced, and the service life of the sliding block 100 can be prolonged.

In addition, because the slide block 100 is stressed uniformly, the outer arm support 300 for mounting the slide block 100 also bears the stable external force, and the possibility of deformation of the outer arm support 300 is greatly reduced.

In some embodiments, a slot is provided in the outer boom 300 to accommodate the slider 100. The notch enlarges the partial gap between the inner arm support 200 and the outer arm support 300, and the sliding block 100 is arranged in the notch, so that the sliding block 100 can freely rotate, the gap between the arm supports is not increased, the appearance of the telescopic arm support is not affected, and meanwhile, the sliding block 100 is convenient to install.

In summary, the slider 100 provided in this embodiment of the present application changes the current situation of a single material of the slider 100, and a design of a multi-layer structure is adopted in a breakthrough manner, so that the slider 100 adopts a multi-layer structure design, the performance of the slider 100 is guaranteed to be compatible with wear resistance and elasticity, the problem that the boom is not effectively limited due to the fact that the gap between the local slider 100 and the boom is far more than 2mm is solved, the condition that the inner boom 200 shakes in the amplitude variation action of the telescopic boom and the rotation process of the vehicle body is avoided, and the inner boom 200 is guaranteed to slide stably relative to the outer boom 300.

The telescopic boom assembly provided by the application comprises an outer boom 300 and an inner boom 200 which can move telescopically relative to the outer boom 300, and further comprises a sliding block 100 which is arranged between the outer boom 300 and the inner boom 200 and is described in the above embodiment.

In some embodiments, two sets of sliders 100 are provided, two sets of sliders 100 are disposed at intervals along the axial direction of the inner boom 200, and any set of sliders 100 is disposed along the peripheral direction of the inner boom 200.

Preferably, eight sliding blocks 100 may be provided in each group of sliding blocks 100, and the eight sliding blocks 100 are uniformly distributed on four contact surfaces of the inner arm frame 200, that is, two sliding blocks 100 are provided on each contact surface of the inner arm frame 200, so as to further improve the sliding stability of the inner arm frame 200 relative to the outer arm frame 300.

It should be noted that in this specification relational terms such as first and second are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The telescopic arm assembly and the sliding block thereof provided by the application are described in detail above. Specific examples are employed herein to illustrate the principles and embodiments of the present application, and the above examples are provided only to assist in understanding the aspects of the present application and their core ideas. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.

Claims (8)

1. A slider for supporting an inner boom during telescoping movement of the inner boom relative to an outer boom to prevent rocking of the inner boom, the slider comprising:

the wear-resistant layer is used for contacting with the outer arm support or the inner arm support;

the elastic layer is connected with the wear-resistant layer and is used for generating elastic deformation after the wear-resistant layer is extruded by the outer arm support or the inner arm support.

2. The slider of claim 1 further comprising a removable connector, wherein the wear layer is provided with a first connection structure and the resilient layer is provided with a second connection structure, the removable connector cooperating with the first connection structure and the second connection structure to connect the wear layer with the resilient layer.

3. The slider of claim 1 wherein the wear layer has a first bonding surface adjacent a side of the resilient layer and the resilient layer has a second bonding surface adjacent a side of the wear layer, the first bonding surface being bonded to the second bonding surface to connect the wear layer to the resilient layer.

4. The slider of claim 1 wherein the elastomeric layer is one or both of a rubber layer and a polyurethane layer.

5. The slider of any of claims 1-4 further comprising a pivot, wherein the elastic layer is rotatably coupled to the outer arm by the pivot, the pivot having an axis disposed horizontally and perpendicular to the direction of extension of the inner arm.

6. The slider of claim 5 wherein said pivot is provided in an axial configuration.

7. A telescopic boom assembly comprising an outer boom and an inner boom telescopically movable relative to the outer boom, further comprising a slider as claimed in any one of claims 1 to 6 disposed between the outer boom and the inner boom.

8. The telescopic boom assembly according to claim 7, wherein two groups of the sliding blocks are arranged, the two groups of the sliding blocks are arranged at intervals along the axial direction of the inner boom, and any group of the sliding blocks are arranged along the peripheral direction of the inner boom.