Lifting oil cylinder fixing structure

Abstract

The utility model relates to the technical field of forklifts, in particular to a lifting oil cylinder fixing structure, which comprises an inner gantry, an outer gantry and a lifting oil cylinder, a support plate and a cross beam are respectively fixed on the same sides of the outer gantry and the inner gantry, the support plate is fixed at the bottom of the outer gantry, and the cross beam is fixed at the top of the inner gantry; the lifting oil cylinder comprises a cylinder body and a telescopic rod, the cylinder body and the supporting plate are fixed through a locking piece, and the telescopic rod and the cross beam are fixed through a locking piece. When the telescopic device is used, the fixing holes are formed in the side faces of the cylinder body and the supporting plate, the fixing holes are formed in the rod head of the telescopic rod and the two ends of the cross beam, and the cylinder body, the supporting plate, the telescopic rod and the cross beam are fixed through the locking pieces, so that overall installation is completed; therefore, the installation and maintenance efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of forklifts, in particular to a lifting oil cylinder fixing structure. Background Art

[0002] As the core component of a forklift truck that enables cargo stacking, the ease of installation, secure fixation, and ease of maintenance of the lifting cylinder have a significant impact on the work efficiency of production and after-sales maintenance teams.

[0003] There are many existing technologies for the fixed structure of the lifting cylinder, such as:

[0004] Chinese Patent Publication No. CN204298028U discloses a forklift mast front lifting cylinder mounting structure, including a cylinder, the top of the cylinder is connected to the cylinder head seat; a mounting platform is provided in the middle of the cylinder, the mounting platform is provided with a mounting side wall, the mounting side wall is provided with a cylinder mounting hole, the mounting side wall is connected to the inner mast middle beam by mounting bolts, and an annular adjustment gasket is provided between the mounting side wall and the inner mast middle beam; two front lifting chain mounting holes are provided on the mounting platform, and the two front lifting chain mounting holes are used to install chain bolts; a pin hole is provided on the bottom of the cylinder, the axis of the pin hole is parallel to the axis of the cylinder, a pin shaft is provided in the pin hole, and the lower end of the pin shaft is welded and fixed to the lower crossbeam of the inner mast.

[0005] It can be seen that the current installation structures of most lifting cylinders include a cylinder head seat connected at the top and a support seat connected at the bottom. The telescopic rod of the lifting cylinder is installed in the cylinder head seat by bolts, and one end of the cylinder body of the lifting cylinder is fixed from the bottom of the support seat by bolts and pins, thereby fixing the lifting cylinder. However, this fixing method will also make it more troublesome to repair the lifting cylinder. When removing the telescopic rod of the lifting cylinder, a folding screwdriver must be used to insert it into the cylinder head seat to remove the bolts. When removing the cylinder body of the lifting cylinder, the mast needs to be laid down as a whole to have space to remove the bolts and pins that fix the cylinder body of the lifting cylinder.

[0006] In view of this, we propose a lifting cylinder fixing structure. Utility Model Content

[0007] The purpose of the present utility model is to provide a lifting cylinder fixing structure to solve the problems raised in the above background technology.

[0008] To achieve the above purpose, the present invention provides the following technical solutions:

[0009] A lifting cylinder fixing structure includes an inner mast, an outer mast and a lifting cylinder, wherein a support plate and a crossbeam are fixed on the same side of the outer mast and the inner mast respectively, wherein the support plate is fixed to the bottom of the outer mast and the crossbeam is fixed to the top of the inner mast; the lifting cylinder includes a cylinder body and a telescopic rod, and the cylinder body and the support plate as well as the telescopic rod and the crossbeam are fixed by locking pieces.

[0010] As a further solution of the present invention: a boss is provided at one end of the cylinder body connected to the support plate, and the boss is clamped with the top of the support plate.

[0011] As a further solution of the present invention: fixing holes are provided on the sides of the cylinder body and the support plate, and fixing holes are provided on the rod head of the telescopic rod and both ends of the crossbeam.

[0012] As a further solution of the present invention: the locking member is a combination bolt, and a spacer is provided between the fixing hole of the cylinder body and the combination bolt.

[0013] As a further solution of the present invention: the apertures on both sides of the fixing hole of the crossbeam are different, wherein the aperture for installing the telescopic rod is a small aperture, and the other side is a large aperture, and a large flat washer is installed in the large aperture, and the large aperture is also sleeved with a protective cover for covering the locking piece.

[0014] As a further solution of the present invention: the inner door frame is installed in the frame body of the outer door frame, and the inner door frame is slidably connected to the outer door frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The lifting cylinder fixing structure has fixing holes on the sides of the cylinder body and the support plate, fixing holes on the rod head of the telescopic rod and both ends of the cross beam, and the cylinder body and the support plate as well as the telescopic rod and the cross beam are fixed by locking parts, thereby completing the overall installation. When repairing and disassembling, there is no need to use specific tools or lay the entire device down for disassembly, which improves the installation and maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the installation structure of the lifting cylinder bottom and the outer mast of this solution;

[0018] Figure 2 This is a schematic diagram of the installation structure of the lifting cylinder top and inner mast of this scheme.

[0019] The meaning of each number in the figure is:

[0020] 100, support plate; 200, cylinder body; 201, boss; 202, telescopic rod; 300, crossbeam. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example

[0023] At present, the installation structure of most lifting cylinders includes a cylinder head seat connected at the top and a support seat connected at the bottom. The telescopic rod 202 of the lifting cylinder is installed in the cylinder head seat by bolts, and one end of the cylinder body 200 of the lifting cylinder is fixed from the bottom of the support seat by bolts and pins, thereby fixing the lifting cylinder. However, this fixing method will also make it more troublesome to repair the lifting cylinder. When removing the telescopic rod 202 of the lifting cylinder, a folding screwdriver must be used to insert it into the cylinder head seat to remove the bolts. When removing the cylinder body 200 of the lifting cylinder, the mast needs to be laid down as a whole to have space to remove the bolts and pins that fix the cylinder body 200 of the lifting cylinder.

[0024] Therefore, see Figure 1 and Figure 2 As shown, the purpose of this embodiment is to provide a lifting cylinder fixing structure, which includes an inner mast, an outer mast and a lifting cylinder. Considering the lifting limit of the inner mast, the inner mast is installed in the frame body of the outer mast, and the inner mast and the outer mast are slidably connected. When the lifting cylinder pushes the inner mast to move up and down, the frame body of the outer mast is used to limit the moving direction of the inner mast, thereby reducing the possibility of deviation.

[0025] In consideration of the convenience of installation and disassembly of the lifting cylinder, a support plate 100 and a crossbeam 300 are fixed on the same side of the outer door frame and the inner door frame respectively. The support plate 100 is fixed to the bottom of the outer door frame, and the crossbeam 300 is fixed to the top of the inner door frame. The lifting cylinder includes a cylinder body 200 and a telescopic rod 202. The cylinder body 200 and the support plate 100 are both provided with fixing holes on the side, and the rod head of the telescopic rod 202 and the two ends of the crossbeam 300 are both provided with fixing holes. The cylinder body 200 and the support plate 100 as well as the telescopic rod 202 and the crossbeam 300 are fixed by locking members. In this embodiment, the locking members are selected from combination bolts. The fixing hole at the top of the telescopic rod 202 is a threaded hole; by changing the fixing direction of the cylinder body 200 and the support plate 100 from vertical fixation at the bottom to horizontal fixation, maintenance space is left, which is convenient for maintenance personnel to directly remove the combination bolts through maintenance tools without having to put the entire device down, and the top telescopic rod 202 and the crossbeam 300 are directly fixed by combination bolts, which also facilitates the use of maintenance tools and improves the installation and disassembly efficiency of the lifting cylinder; at the same time, abandoning the use of support base and cylinder head base also saves space, meeting the existing door frame landing height and short size requirements.

[0026] Conventionally, the cylinder body 200 and the support seat are fixed by installing a pin. Since the pin is installed by inserting it from the bottom to the top, it is troublesome to disassemble. Therefore, a boss 201 is provided at one end of the cylinder body 200 connected to the support plate 100, and the boss 201 is clamped with the top of the support plate 100. The boss 201 is provided to prevent the oil cylinder from rotating on the one hand, and on the other hand, the boss 201 allows the force generated by the forklift cargo on the oil cylinder and the weight of the oil cylinder itself to fall on the boss 201, which can effectively reduce the deformation of the oil cylinder.

[0027] During lifting, if there is a gap between the cylinder body 200 and the support plate 100, it is very likely that the combination bolts will be subjected to shear force and break. Therefore, a spacer is filled between the fixing hole of the cylinder body 200 and the combination bolt to fill the gap through the spacer, thereby reducing the occurrence of combination bolt breakage.

[0028] During the cargo handling process, the up and down movement of the oil cylinder can easily cause the telescopic rod 202 to separate from the crossbeam 300. Therefore, the fixing holes of the crossbeam 300 are designed to have different apertures on both sides. The aperture for installing the telescopic rod 202 is a small aperture, and the other side has a large aperture. A large flat washer is installed in the large aperture, and the rod head of the telescopic rod 202 is fixed by the large flat washer and a combination bolt, thereby preventing the oil cylinder from separating from the crossbeam 300 of the inner mast when moving up and down.

[0029] Taking into account outdoor operations and operations in rainy days, the combination bolts are very likely to rust, especially the combination bolts fixed by the crossbeam 300, which are prone to rainwater accumulation in the fixing holes of the crossbeam 300. Therefore, the large aperture is also equipped with a protective cover for covering the combination bolts. The combination bolts are covered by the protective cover to prevent rainwater from causing rust on the combination bolts. At the same time, in order to reduce the impact of rainwater on the protective cover, the protective cover is made of rubber material.

[0030] In summary, the working principle of this solution is as follows:

[0031] Take the lifting cylinder, clamp the boss 201 end of the lifting cylinder on the top of the support plate 100, align the fixing holes of the cylinder body 200 and the support plate 100, insert the spacer, and then insert the combination bolt to fix the cylinder body 200 and the support plate 100; then insert the rod head of the telescopic rod 202 into the fixing hole of the crossbeam 300, place a large flat washer on the other side of the fixing hole, pass the combination bolt through the large flat washer and the crossbeam 300, and fix it with the rod head of the telescopic rod 202 through the thread. Finally, take the protective cover and put it into the fixing hole of the crossbeam 300 to complete the installation.

[0032] Although this specification is described according to implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0033] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent modifications made according to the scope of the claims of the present application are within the scope of protection of the claims of the present application.

Claims

1. A lifting cylinder fixing structure, comprising an inner mast, an outer mast and a lifting cylinder, characterized in that: A support plate (100) and a crossbeam (300) are fixed to the same side of the outer door frame and the inner door frame, respectively, wherein the support plate (100) is fixed to the bottom of the outer door frame, and the crossbeam (300) is fixed to the top of the inner door frame; the lifting cylinder comprises a cylinder body (200) and a telescopic rod (202), and the cylinder body (200), the support plate (100), the telescopic rod (202) and the crossbeam (300) are fixed by a locking member.

2. The lifting cylinder fixing structure according to claim 1, characterized in that: One end of the cylinder body (200) connected to the support plate (100) is provided with a boss (201), and the boss (201) is clamped with the top of the support plate (100).

3. The lifting cylinder fixing structure according to claim 1, characterized in that: The cylinder body (200) and the support plate (100) are both provided with fixing holes on their sides, and the rod head of the telescopic rod (202) and both ends of the crossbeam (300) are both provided with fixing holes.

4. The lifting cylinder fixing structure according to claim 3, characterized in that: The locking member is a combination bolt, and a spacer is provided between the fixing hole of the cylinder body (200) and the combination bolt.

5. The lifting cylinder fixing structure according to claim 3, characterized in that: The apertures on both sides of the fixing hole of the crossbeam (300) are different, wherein the aperture for installing the telescopic rod (202) is a small aperture, and the other side is a large aperture, and a large flat washer is installed in the large aperture, and a protective cover for covering the locking piece is also sleeved on the large aperture.

6. The lifting cylinder fixing structure according to claim 1, characterized in that: The inner door frame is installed in the frame body of the outer door frame, and the inner door frame is slidably connected to the outer door frame.

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