Single rubber tube tensioning device and telescopic boom forklift loader

Abstract

The utility model discloses a single rubber tube tensioning device and a telescopic boom forklift loader, which comprise a mounting piece provided with a first connecting part used for being connected with a boom and a mounting hole penetrating along a first direction; one end, in the first direction, of the pull rod is provided with a pull head used for being connected with the U-shaped connector, the other end of the pull rod is provided with a threaded section, the threaded section is arranged in the mounting hole in a penetrating mode, the threaded section is in threaded connection with adjusting nuts on the two opposite sides, in the first direction, of the mounting piece, and the pull rod can move in the first direction relative to the mounting piece by adjusting the adjusting nuts; the limiting structure is matched with the pull rod and used for preventing the pull rod from rotating around the center line of the threaded section. The tensioning device for the single rubber pipe is simple in structure, convenient and fast to operate and capable of achieving tensioning adjustment of the single rubber pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of telescopic arm forklifts, in particular to a single hose tensioning device and a telescopic arm forklift. Background Art

[0002] The hose inside the telescopic arm of a telescopic forklift is generally connected to the hydraulic steel pipe through a U-shaped joint, and the hydraulic steel pipe is fixed to the arm frame through a pipe clamp. The hose is prone to entanglement during the telescopic movement of the arm frame. Once the hose is entangled, it is easy to be damaged. The main reason for entanglement is that the hose is too long and loose.

[0003] There are currently three common methods in the industry to solve the problem of hose entanglement. The first is to arrange a drag chain inside or outside the boom and place the hose in the drag chain to solve the above problem, as described in patents CN102829247B and CN108709013B; the second is to set multiple guide grooves inside the boom to separate the hoses one by one, as described in patents CN116553434A and CN220033951U; the third is to arrange a tensioning roller to tension the hose as a whole, as described in patents CN101725765B and CN202297056U. However, the above three methods all have their limitations. First, due to the influence of structural form, appearance and cost, some models are difficult to install internal or external drag chains. Second, when the cross-sectional size of the arm is small and the number of hoses inside the arm is large, it is not practical to set a separate guide groove for each hose. Third, it is impossible to ensure that the length of each hose is completely consistent after processing. Under this premise, the use of rollers for uniform tensioning will inevitably lead to inconsistent tightness of each hose. If it is too tight, the service life will be reduced, and if it is too loose, it will be entangled. Therefore, there is an urgent need for a device with simple structure, convenient operation, and the ability to adjust the tension of a single hose. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a single hose tensioning device, which has a simple structure and is easy to operate, and can achieve tension adjustment of a single hose.

[0005] The utility model also provides a telescopic arm forklift comprising the single hose tensioning device.

[0006] A single hose tensioning device according to the first embodiment of the utility model comprises:

[0007] A mounting member, provided with a first connecting portion for connecting with the arm support, wherein the mounting member is provided with a mounting hole penetrating along a first direction;

[0008] A pull rod, wherein one end of the pull rod along the first direction is provided with a pull head for connecting with the U-shaped joint, and the other end is provided with a threaded section, the threaded section is penetrated through the mounting hole, and the threaded section is respectively threadedly connected with adjusting nuts on opposite sides of the mounting piece along the first direction, and the pull rod can be moved relative to the mounting piece along the first direction by adjusting the adjusting nuts;

[0009] A limiting structure cooperates with the pull rod to prevent the pull rod from rotating around the center line of the threaded segment.

[0010] The single hose tensioning device according to the embodiment of the utility model has at least the following beneficial effects:

[0011] When in use, the mounting piece is connected to the boom through the first connecting part, and the U-shaped joint is connected through the pulling head. When a certain rubber hose inside the boom is too long and loose and needs to be tensioned, first loosen the pipe clamp used to fix the hydraulic steel pipe on the boom so that the hydraulic steel pipe can move, and then loosen the adjusting nut on the side of the mounting piece close to the U-shaped joint, and then tighten the adjusting nut on the side of the mounting piece away from the U-shaped joint, so that the pull rod and the pulling head pull the U-shaped joint to move toward the mounting piece along the first direction. After the adjustment, readjust the pipe clamp to clamp and fix the hydraulic steel pipe, thereby completing the tensioning of a certain rubber hose inside the boom. The single hose tensioning device using the above-mentioned structure is simple in structure and easy to operate, and can realize the tensioning adjustment of a single hose.

[0012] According to some embodiments of the present invention, the first connecting portion is configured as a first bolt.

[0013] According to some embodiments of the utility model, the mounting member is provided with a plurality of mounting holes spaced apart along a second direction, the pull rods are provided in one-to-one correspondence with the mounting holes, and the second direction is perpendicular to the first direction.

[0014] According to some embodiments of the utility model, the limiting structure includes a card plate, the card plate is provided with a card slot passing through along the first direction, the pull rod is passed through the card slot, and the pull rod is provided with matching planes on opposite sides along a third direction, respectively, the matching planes are in contact with the side walls of the card slot, and the third direction is perpendicular to the first direction.

[0015] According to some embodiments of the utility model, the clamping plate is provided with a second connecting portion, and the second connecting portion is used to be connected to the arm.

[0016] According to some embodiments of the utility model, the slider includes a slider body and a baffle, the slider body is provided with an embedding groove for partially embedding the U-shaped joint, and the baffle is detachably provided on the opening side of the embedding groove for limiting the U-shaped joint in the embedding groove.

[0017] According to some embodiments of the present invention, a side of the embedding groove along the first direction away from the pull rod is provided with an arc-shaped matching surface adapted to the U-shaped joint.

[0018] According to some embodiments of the present invention, the baffle is fixed to the slider body by screws.

[0019] According to some embodiments of the present invention, the slider body is detachably connected to the pull rod.

[0020] The telescopic forklift according to the second embodiment of the utility model comprises the single hose tensioning device described in the first embodiment. By adopting the single hose tensioning device of the first embodiment, the problem of hose winding inside the boom can be effectively solved, its service life can be increased, and the situation of removing the boom to replace the hose can be avoided.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0023] Figure 1 This is a schematic diagram of the installation structure of a single hose tensioning device according to an embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the structure decomposition of a single hose tensioning device according to an embodiment of the utility model;

[0025] Figure 3 The utility model is a schematic structural diagram of a single hose tensioning device assembled on an arm frame.

[0026] Figure Number:

[0027] A mounting member 100 and a first connecting portion 110;

[0028] Arm 200, pipe clamp 210;

[0029] The pull rod 300, the matching plane 301, the pull head 310, the pull head body 311, the baffle 312, the embedding groove 313, the arc-shaped matching surface 314, the threaded section 320, and the adjusting nut 330;

[0030] U-joint 400, hydraulic steel pipe 410;

[0031] The card plate 500 , the card slot 510 , and the second connecting portion 520 . DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0035] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0036] The hose in the telescopic arm of the telescopic forklift is generally connected to the hydraulic steel pipe 410 through a U-shaped joint 400, and the hydraulic steel pipe 410 is fixed to the arm frame 200 through a pipe clamp 210 (the pipe clamp 210 may be multiple locations). The hydraulic steel pipe 410 is generally located on the outside of the arm frame 200 (such as Figure 3 As shown in the figure, the hose is prone to entanglement during the telescopic movement of the boom 200. After the hose is entangled, it is easy to be damaged. The main reason for the entanglement is that the hose is too long and loose. To this end, the utility model proposes a single hose tensioning device and a telescopic arm forklift to effectively solve the problem of hose entanglement inside the boom 200, increase its service life, and avoid the situation of dismantling the boom to replace the hose.

[0037] Reference below Figures 1 to 3 A single hose tensioning device and a telescopic arm forklift according to an embodiment of the utility model are described.

[0038] The single hose tensioning device according to the first embodiment of the utility model includes: a mounting member 100, a pull rod 300 and a limiting structure.

[0039] The mounting member 100 is provided with a first connecting portion 110 for connecting with the arm 200 , that is, the mounting member 100 can be installed on the arm 200 through the first connecting portion 110 , and a mounting hole is provided on the mounting member 100 , which is a through hole and penetrates along the first direction.

[0040] The pull rod 300 is distributed along the first direction, and one end of the pull rod 300 along the first direction is provided with a pull head 310 for connecting with the U-shaped joint 400, and the other end of the pull rod 300 along the first direction is provided with a threaded section 320, and the threaded section 320 is provided with an external thread. The threaded section 320 is penetrated through the mounting hole, and the threaded section 320 is respectively threadedly connected with adjusting nuts 330 on opposite sides of the mounting member 100 along the first direction. By adjusting the adjusting nuts 330 on both sides of the mounting member 100, the pull rod 300 can be moved relative to the mounting member 100 along the first direction; obviously, tightening the adjusting nuts 330 on both sides of the mounting member 100 makes the adjusting nuts 330 on both sides of the mounting member 100 abut against the mounting member 100 respectively. When the pull rod 300 is on both sides relative to the mounting member 100, the pull rod 300 is fixed relative to the mounting member 100. When it is necessary to move the pull rod 300 relative to the mounting member 100 along the first direction, first loosen the adjusting nut 330 on one side of the mounting member 100, and then tighten the adjusting nut 330 on the other side of the mounting member 100, so that the adjusting nuts 330 on both sides of the mounting member 100 can re-clamp the mounting member 100. During the movement of the pull rod 300 relative to the mounting member 100, the pull head 310 will be driven to move, thereby driving the U-shaped joint 400 to move, so as to adjust the tightness of the hose. By controlling the tightening torque value of the adjusting nut 330, the tightness of the hose can be controlled so that the tightness of the hose is within an appropriate range, neither too tight nor too loose.

[0041] The limiting structure cooperates with the pull rod 300, and the limiting structure is used to prevent the pull rod 300 from rotating around the center line of the threaded section 320. It can be understood that when the hose is tensioned and adjusted, the hose and the hydraulic steel pipe 410 cannot be twisted, that is, the pull head 310 used to connect the U-shaped joint 400 cannot be rotated. Therefore, a limiting structure is set to prevent the pull rod 300 from rotating, and the pull rod 300 is limited to moving only in the first direction, to prevent the pull head 310 from rotating and causing torsional damage to the hydraulic steel pipe 410 and the hose.

[0042] When in use, the mounting member 100 is connected to the boom 200 through the first connecting portion 110, and the U-shaped joint 400 is connected through the pull head 310. When a certain rubber hose inside the boom 200 is too long and loose and needs to be tightened, the pipe clamp 210 used to fix the hydraulic steel pipe 410 on the boom 200 is first loosened to allow the hydraulic steel pipe 410 to move, and then the adjusting nut 330 on the side of the mounting member 100 close to the U-shaped joint 400 is loosened, and then the adjusting nut 330 on the side of the mounting member 100 away from the U-shaped joint 400 is tightened. 30, so that the pull rod 300 and the pull head 310 pull the U-shaped joint 400 to move along the first direction close to the mounting member 100. After the adjustment, the pipe clamp 210 is readjusted to clamp and fix the hydraulic steel pipe 410, thereby completing the tensioning of a certain hose inside the boom 200. The single hose tensioning device with the above-mentioned structure has a simple structure and is easy to operate, and can realize the tensioning adjustment of a single hose. In addition, the mounting member 100 is connected to the boom 200 through the first connecting portion 110, and the assembly is very convenient.

[0043] In some embodiments of the present invention, referring to Figure 1 and Figure 3 As shown, the first connecting part 110 is configured as a first bolt, that is, the mounting member 100 is installed on the arm 200 through the first bolt. The structure is simple and the operation is convenient. Specifically, the mounting member 100 is a plate-like structure, and two first bolts are provided. It should be noted that whether the first bolt needs to be equipped with a nut needs to be considered according to the specific structure of the arm 200.

[0044] In some embodiments of the present invention, referring to Figure 1 and Figure 2 As shown, the mounting member 100 is provided with a plurality of mounting holes spaced along the second direction, the second direction is perpendicular to the first direction, and the pull rods 300 are arranged one by one with the mounting holes, that is, each mounting hole corresponds to a pull rod 300, and one pull rod 300 can be used to tension and adjust one hose, and multiple pull rods 300 can be used to tension and adjust multiple hoses, and each pull rod 300 is independent of each other and can be adjusted separately; obviously, there are multiple hoses inside the boom 200, and multiple pull rods 300 are centrally arranged on a mounting member 100 for tensioning and adjusting multiple hoses, which has a compact structure and is convenient for overall disassembly and assembly. In addition, it can be imagined that the single hose tensioning device of this embodiment can be fixed on the boom 200 as a part of the product, or as a tool, which is assembled on the boom 200 when the hose needs to be tensioned and adjusted, and then removed after adjustment, and when used as a tool, only one pull rod 300 is required.

[0045] In some embodiments of the present invention, referring to Figure 1 and Figure 2As shown, the limiting structure includes a card plate 500, a card slot 510 is provided on the card plate 500, the card slot 510 is through along the first direction, the pull rod 300 is inserted into the card slot 510, and the pull rod 300 is provided with matching planes 301 on opposite sides along the third direction, the third direction is perpendicular to the first direction, and the matching planes 301 on opposite sides of the pull rod 300 are respectively affixed to opposite side walls of the card slot 510, so as to prevent the pull rod 300 from rotating around the center line of the threaded section 320, and the structure is simple, stable and reliable. In some specific embodiments, a plurality of mounting holes are provided on the mounting member 100 at intervals along the second direction, the second direction, the first direction and the third direction are perpendicular to each other, the pull rod 300 and the mounting holes are arranged one by one, that is, each mounting hole corresponds to a pull rod 300, the card slots 510 are distributed along the second direction, and each pull rod 300 passes through the card slot 510.

[0046] In some embodiments of the present invention, referring to Figure 1 and Figure 2 As shown, the card plate 500 is provided with a second connecting portion 520, and the second connecting portion 520 is used to connect with the arm 200, so as to fix the card plate 500 on the arm 200 to limit the pull rod 300. Specifically, the second connecting portion 520 is configured as a second bolt, and two second bolts are provided, which is convenient for disassembly and assembly. In addition, the first connecting portion 110 is configured as a first bolt, and two first bolts are provided. In this way, the entire device can be installed on the arm 200 by four bolts, and the disassembly and assembly operations are very convenient. It should be noted that whether the second bolt needs to be equipped with a nut needs to be considered according to the specific structure of the arm 200.

[0047] In some embodiments of the present invention, referring to Figure 1 and Figure 2 As shown, the slider 310 includes a slider body 311 and a baffle 312. The slider body 311 is provided with an embedding groove 313 for partially embedding the U-shaped joint 400. The baffle 312 is detachably arranged on the open side of the embedding groove 313. The baffle 312 is used to limit the U-shaped joint 400 in the embedding groove 313. When connecting the slider 310 and the U-shaped joint 400, the baffle 312 is first removed, and then the arc section of the U-shaped joint 400 is embedded in the embedding groove 313 of the slider body 311. Then, the baffle 312 is installed to limit the U-shaped joint 400, so that the slider 310 and the U-shaped joint 400 can be connected. The structure is simple and easy to operate. Specifically, the baffle 312 is fixed to the slider body 311 by two screws, and the structure is stable and reliable, and the baffle 312 is easy to disassemble and assemble.

[0048] In some embodiments of the present invention, referring to Figure 1 and Figure 2As shown, the side of the embedding groove 313 away from the pull rod 300 along the first direction is provided with an arc-shaped matching surface 314 adapted to the U-shaped joint 400. When the pull rod 300 pulls the U-shaped joint 400 through the pull head 310, it contacts the U-shaped joint 400 through the arc-shaped matching surface 314, thereby increasing the contact area between the pull head 310 and the U-shaped joint 400 and preventing the U-shaped joint 400 from being pulled and deformed.

[0049] In some embodiments of the present invention, referring to Figure 1 and Figure 2 As shown, the slider body 311 and the pull rod 300 are detachably connected, and the separate arrangement of the two facilitates manufacturing and reduces the replacement cost when worn. In some specific embodiments, a stud is provided at one end of the pull rod 300, and a threaded hole is provided on the slider body 311 and is threadedly connected to the stud to achieve a detachable connection between the slider body 311 and the pull rod 300. Of course, the slider body 311 and the pull rod 300 can also be connected by a connection structure of other structural forms, which is a conventional structure in the prior art and is not listed here one by one.

[0050] A telescopic arm forklift according to an embodiment of the second aspect of the utility model comprises the single hose tensioning device of the above-mentioned embodiment of the first aspect.

[0051] The telescopic arm forklift adopts the single hose tensioning device of the first embodiment described above, which can effectively solve the problem of hose entanglement inside the arm frame 200, increase its service life, and avoid the situation of removing the arm to replace the hose.

[0052] It should be noted that, since the telescopic arm forklift can adopt all the technical solutions of the single hose tensioning device of the first aspect embodiment mentioned above, it at least has all the beneficial effects brought by the technical solutions of the first aspect embodiment mentioned above, and these additional beneficial effects will not be repeated here.

[0053] It can be understood that other structures and operations of the telescopic arm forklift according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.

[0054] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A single hose tensioning device, characterized in that: include: A mounting member (100) provided with a first connecting portion (110) for connecting to the arm support (200), wherein the mounting member (100) is provided with a mounting hole extending through along a first direction; A pull rod (300), wherein one end of the pull rod (300) along the first direction is provided with a pull head (310) for connecting to the U-shaped joint (400), and the other end is provided with a threaded section (320), wherein the threaded section (320) is passed through the mounting hole, and the threaded section (320) is threadedly connected to adjusting nuts (330) on opposite sides of the mounting member (100) along the first direction, respectively, and the pull rod (300) can be moved relative to the mounting member (100) along the first direction by adjusting the adjusting nuts (330); A limiting structure cooperates with the pull rod (300) and is used to prevent the pull rod (300) from rotating around the center line of the threaded section (320).

2. The single hose tensioning device according to claim 1, characterized in that: The first connection portion (110) is configured as a first bolt.

3. The single hose tensioning device according to claim 1, characterized in that: The mounting member (100) is provided with a plurality of mounting holes at intervals along a second direction, the pull rods (300) are arranged in one-to-one correspondence with the mounting holes, and the second direction is perpendicular to the first direction.

4. The single hose tensioning device according to claim 1, characterized in that: The limiting structure includes a card plate (500), the card plate (500) is provided with a card slot (510) passing through along the first direction, the pull rod (300) is inserted into the card slot (510), and the pull rod (300) is provided with matching planes (301) on opposite sides along a third direction, respectively, the matching planes (301) are in contact with the side walls of the card slot (510), and the third direction is perpendicular to the first direction.

5. The single hose tensioning device according to claim 4, characterized in that: The clamping plate (500) is provided with a second connecting portion (520), and the second connecting portion (520) is used to be connected to the arm frame (200).

6. The single hose tensioning device according to claim 1, characterized in that: The slider (310) comprises a slider body (311) and a baffle (312); the slider body (311) is provided with an embedding groove (313) for partially embedding the U-shaped joint (400); the baffle (312) is detachably arranged on the opening side of the embedding groove (313) for limiting the U-shaped joint (400) in the embedding groove (313).

7. The single hose tensioning device according to claim 6, characterized in that: A side of the embedding groove (313) away from the pull rod (300) along the first direction is provided with an arc-shaped matching surface (314) adapted to the U-shaped joint (400).

8. The single hose tensioning device according to claim 6, characterized in that: The baffle (312) is fixed to the slider body (311) by means of screws.

9. The single hose tensioning device according to claim 6, characterized in that: The pull head body (311) is detachably connected to the pull rod (300).

10. A telescopic forklift, characterized in that: It comprises a single hose tensioning device as described in any one of claims 1 to 9.

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