Sliding block device, telescopic boom and crane

Abstract

The utility model provides a sliding block device, a telescopic boom and a crane, the sliding block device comprises a sliding block body and a pressing plate, the sliding block body comprises a sliding block body and a shaft body, the shaft body is arranged in the length direction of the sliding block body, one end of the shaft body is pre-buried in the sliding block body, and the other end of the shaft body protrudes out of the sliding block body at one end of the sliding block body in the length direction; the pressing plate is connected with the sliding block body through the part, protruding out of the sliding block body, of the shaft body. The sliding block device is convenient to install and high in compression resistance and bearing capacity, and the problems that in the prior art, a sliding block is poor in compression resistance and complex to install can be effectively solved.

Description

Technical Field

[0001] This application relates to the field of sliders, and particularly to a slider device, a telescopic boom and a crane Background Art

[0002] A telescopic boom generally includes multiple boom sections, among which the outermost one is a fixed boom section, and multiple movable boom sections are sequentially connected inside the fixed boom section. Adjacent two movable boom sections are slidably connected to each other through sliders. Specifically, taking the end close to the fixed boom section as the proximal end and the end far from the fixed boom section as the distal end, the outer wall of the proximal end of each movable boom section is slidably connected to the previous boom section through a slider, and the inner wall of the distal end is slidably connected to the next boom section through a slider. Similarly, the inner wall of the distal end of the fixed boom section is also slidably connected to the next boom section through a slider. Through the above structure, multiple boom sections of the telescopic boom can be extended or retracted as needed under the power of a hydraulic cylinder

[0003] In order to prevent the sliders from moving around, the traditional method is to use engineering nylon sliders assembled in the gap between the sleeve booms. The sliders are made in an "L" shape, hung at the opening, and fixed by pressing with a steel plate to prevent the sliders from moving around. Such sliders are prone to breakage at the bent part when the lubrication is poor or the friction force is large, and the assembly is also relatively troublesome. Another method is to directly design bolt holes on the sliders and install them with bolts. This structure has a large bearing capacity in the direction of the pressing plate and good force application, but the nylon material has low strength, and the bearing capacity of the tapped thread is small and is often pulled off and falls out from the other end Summary of the Invention

[0004] In view of this, this application provides a slider device, a telescopic boom and a crane to solve the problems of poor compressive capacity of the sliders and cumbersome installation

[0005] As the first aspect of this application, a slider device is provided, which includes a slider body and a pressing plate. The slider body includes a slider main body and a shaft body. The shaft body is arranged along the length direction of the slider body. One end of the shaft body is embedded in the slider main body, and the other end of the shaft body protrudes from the slider main body at one end of the slider main body along the length direction. The pressing plate is connected to the slider body through the part of the shaft body protruding from the slider main body

[0006] In a possible implementation manner of this application, the shaft body is a screw rod, and a threaded structure is provided on the part of the screw rod protruding from the slider main body

[0007] In a possible implementation manner of this application, a shaft hole is opened on the pressing plate, and the screw rod passes through the shaft hole and is connected to a self-locking nut, so that the slider abuts against the pressing plate

[0008] In a possible implementation manner of the present application, one of the shafts is arranged along the central axis of the slider body.

[0009] In a possible implementation manner of the present application, the number of the shafts is multiple, and along the direction from the central axis of the slider body to the edge of the slider body, the length of the part of the shaft embedded in the slider body gradually decreases.

[0010] In a possible implementation manner of the present application, the slider body further includes a nylon sleeve, and the nylon sleeve is arranged between the shaft and the slider body.

[0011] As a second aspect of the present application, the present application further provides a telescopic boom, including an adjacent outer boom section and an inner boom section, and further including the slider device as described in any item of the first aspect, where the slider device is located between the outer boom section and the inner boom section and is used to adjust the gap between the outer boom section and the inner boom section.

[0012] In a possible implementation manner of the present application, a screw hole is formed in the pressing plate, a bolt passes through the screw hole, and the pressing plate is fixed to the end face of the outer boom section close to the extending direction of the inner boom section through the bolt.

[0013] In a possible implementation manner of the present application, the pressing plate is fixed to the outer boom section through at least two bolts.

[0014] As a third aspect of the present application, the present application further provides a crane, including the telescopic boom as described in any item of the second aspect.

[0015] For a slider device, a telescopic boom and a crane provided by the present application, one end of the shaft is embedded in the slider body, the other end of the shaft protrudes from the slider body at one end of the slider body in the length direction, and the pressing plate is connected to the slider body through the part of the shaft protruding from the slider body. In the above technical solution, the shaft is used as the main load-bearing structure, which greatly increases the load-bearing capacity of the slider. At the same time, the force of the installation structure is more reasonable. The structure of the above slider device is relatively simple and convenient to install, which greatly improves the disassembly and assembly efficiency of the slider. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] By describing the embodiments of the present application in more detail in combination with the drawings, the above and other objects, features and advantages of the present application will become more obvious. The drawings are used to provide a further understanding of the embodiments of the present application, and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation to the present application. In the drawings, the same reference numerals generally represent the same components or steps.

[0017] Figure 1 The following shows a schematic structural diagram of a slider body provided by an embodiment of the present application.

[0018] Figure 2 The following is a schematic structural diagram of a slider device provided by an embodiment of the present application.

[0019] Figure 3 The following is another schematic structural diagram of a slider device provided by an embodiment of the present application.

[0020] Figure 4 The following is a schematic process diagram of a pressing plate provided by an embodiment of the present application.

[0021] Figure 5 The following is a schematic structural diagram provided by an embodiment of the present application.

[0022] Figure 6 The following is a schematic structural diagram provided by an embodiment of the present application.

[0023] Reference numerals:

[0024] 10 - slider body, 20 - pressing plate, 30 - self - locking nut, 40 - bolt, 50 - outer arm section, 60 - inner arm section, 101 - slider body, 102 - shaft body, 103 - nylon sleeve, 201 - shaft hole, 202 - screw hole Detailed implementation manners

[0025] In the description of the present application, the meaning of "a plurality" is at least two, for example, two, three, etc., unless otherwise specifically defined. In the embodiments of the present application, all directional indications (such as up, down, left, right, front, back, top, bottom...) are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly. In addition, the terms "include" and "have" and any variations thereof are intended to cover non - exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may alternatively include steps or units not listed, or may alternatively include other steps or units inherent to these processes, methods, products or devices.

[0026] In addition, referring to "embodiment" herein means that a specific feature, structure or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0027] The present application provides a slider device.

[0028] The slider device of this embodiment is applied to a telescopic boom, specifically, it can be the telescopic boom of a crane or the telescopic boom of an aerial work platform.

[0029] Generally speaking, a telescopic boom includes a plurality of nested boom sections. The plurality of boom sections can be telescoped under the drive of a rope and pulley assembly or a single-cylinder pin assembly to achieve different working lengths. Among them, the rope and pulley assembly or the single-cylinder pin assembly itself can refer to the related technology and will not be elaborated here.

[0030] As Figure 6 shown, in this embodiment, two adjacent boom sections in the telescopic boom section are taken as an example for illustration. In this embodiment, the outer one of the two boom sections is called the outer boom section 50, and the boom section arranged inside the outer boom section 50 and adjacent to the outer boom section 50 is called the inner boom section 60.

[0031] During the working process, the outer boom section 50 and the inner boom section 60 will slide relative to each other along their axial directions. The slider device in this embodiment is located between the outer boom section 50 and the inner boom section 60 and is used to adjust the gap between the outer boom section 50 and the inner boom section 60 so that the relative sliding between the outer boom section 50 and the inner boom section 60 can be smoother.

[0032] As Figure 1 and Figure 2 shown, in one embodiment, the slider device includes a slider body 10 and a pressing plate 20. When in use, the slider body 10 is located between the outer boom section 50 and the inner boom section 60 and mainly realizes adjusting the gap between the outer boom section 50 and the inner boom section 60, while the pressing plate 20 is mainly used to fix the slider device at a specified position.

[0033] As Figure 3 shown, in one embodiment, the slider body 10 includes a slider main body 101 and a shaft body 102. The slider main body 101 is the main stress-bearing structure. In one embodiment, it is generally in a flat structure. Further, it can be in different shapes such as square, circular, etc. to better share and bear the pressure between the outer boom section 50 and the inner boom section 60.

[0034] Please continue to refer to Figure 3 , the shaft body 102 is arranged along the length direction of the slider body 10. One end of the shaft body 102 is embedded in the slider main body 101. Different from the related technology in which a through hole is opened in the slider body 10, in the technical solution of this embodiment, the shaft body 102 only extends into the slider body 10 for a certain distance. In other words, one end of the shaft body 102 is hidden inside the slider main body 101. In this way, when the slider main body 101 is subjected to the pressure between the outer boom section 50 and the inner boom section 60, stress concentration will not occur near the shaft body 10, resulting in cracking of the slider main body 101 at the shaft body 102.

[0035] AsFigures 1 to 3 As shown, the other end of the shaft body 102 protrudes from the slider body 101 at one end of the slider body 101 in the length direction, and the pressing plate 20 is connected to the slider body 10 through the part of the shaft body 102 that protrudes from the slider body 101.

[0036] The other end of the shaft body 102 extending out of the slider body 101 is mainly used to fix the slider body 101. In an exemplary embodiment, the shaft body 102 is a screw rod, and a threaded structure is provided on the part of the screw rod that protrudes from the slider body 101. In this way, during use, the slider body 101 and the pressing plate 20 can be fixed by cooperating a fastener such as a nut with the threaded structure.

[0037] As Figures 1 to 3 shown, in some embodiments, in order to improve the fixing effect between the slider body 101 and the pressing plate 20, three shaft bodies 102 are provided in each slider body 101. One shaft body 102 is arranged along the central axis of the slider body 101, and the other two shaft bodies 102 are symmetrically arranged along the direction from the central axis of the slider body 101 to the edge of the slider body 101. In this way, the slider body 101 and the pressing plate 20 can be fixed more firmly.

[0038] In some embodiments, along the direction from the central axis of the slider body 101 to the edge of the slider body 101, the length of the part of the shaft body 102 embedded in the slider body 101 gradually decreases. It can be understood that the length of the shaft body 102 arranged along the central axis is greater than the lengths of the other two shaft bodies 102.

[0039] It should be understood that the closer to the center of the slider body 101, the relatively stronger its compressive capacity. Therefore, in this embodiment, the shaft body 102 located at the central position is set relatively long, and the shaft body 102 relatively close to the edge of the slider body 101 is set relatively short, which can improve the compressive capacity of the slider body 101 and reduce the possibility of the slider body 101 cracking.

[0040] As Figure 4 shown, in some embodiments, the pressing plate 20 includes a shaft hole 201 and a screw hole 202. In this embodiment, three shaft holes 201 and two screw holes 202 are provided. One end of the shaft body 102 with a threaded structure passes through the shaft hole 201 and is connected to the self-locking nut 30, so that the slider abuts against the pressing plate 20.

[0041] As Figure 2 、 Figure 6 shown, the bolt 40 passes through the screw hole 202, and the pressing plate 20 is fixed to the end face of one end of the outer arm section 50 close to the extending direction of the inner arm section 60 through the bolt 40. As Figure 5 、 Figure 6 shown, so that the slider device is fixed to the outer arm section 50.

[0042] As Figure 3 shown, in some of these embodiments, the slider body 10 further includes a nylon sleeve 103 disposed between the shaft body 102 and the slider body 101. By providing this nylon sleeve 103, the force transmission between the shaft body 102 and the slider body 101 can be made more sufficient, so as to further reduce the possibility of the slider body 101 cracking under pressure.

[0043] This application also provides a telescopic boom, which includes the above-mentioned slider device. This application provides a crane, which includes a telescopic boom provided with the above-mentioned slider device.

[0044] Since the telescopic boom and the crane of this embodiment include all the technical solutions of the above-mentioned slider device embodiment, they can at least achieve all the above technical effects, which will not be elaborated here.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A slider device, characterized in that: It includes a slider body and a pressure plate, the slider body includes a slider body and a shaft body, the shaft body is arranged along the length direction of the slider body, one end of the shaft body is pre-buried in the slider body, and the other end of the shaft body protrudes from the slider body at one end of the slider body along the length direction, and the pressure plate is connected to the slider body through the part of the shaft body protruding from the slider body.

2. The slider device according to claim 1, characterized in that: The shaft body is a screw rod, and a portion of the screw rod protruding from the slider body is provided with a thread structure.

3. The slider device according to claim 2, characterized in that: The pressing plate is provided with an axial hole, and the screw rod passes through the axial hole and is connected with the self-locking nut, so that the sliding block abuts against the pressing plate.

4. The slider device according to any one of claims 1 to 3, characterized in that: One of the shaft bodies is arranged along the central axis of the slider body.

5. The slider device according to any one of claims 1 to 3, characterized in that: There are multiple shaft bodies, and along the direction from the central axis of the slider body to the edge of the slider body, the length of the part of the shaft body buried in the slider body gradually decreases.

6. The slider device according to claim 1, characterized in that: The slider body also includes a nylon sleeve, and the nylon sleeve is arranged between the shaft body and the slider body.

7. A telescopic boom, comprising adjacent outer boom sections and inner boom sections, characterized in that: It also includes a slider device as described in any one of claims 1 to 6, wherein the slider device is located between the outer arm section and the inner arm section and is used to adjust the gap between the outer arm section and the inner arm section.

8. The telescopic boom according to claim 7, characterized in that: The pressing plate is provided with a screw hole, through which a bolt passes, and the pressing plate is fixed to an end surface of the outer arm section close to an extending direction of the inner arm section through the bolt.

9. The telescopic boom according to claim 8, characterized in that: The pressure plate is fixed to the outer arm section by at least two bolts.

10. A crane, characterized in that: Comprising a telescopic arm as described in any one of claims 7-9.

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