Cylinder rod tightening tool

Abstract

This utility model provides a cylinder rod tightening tool. The cylinder rod tightening tool includes: a first half; and a second half, which can be detachably connected to the first half. At least one rod is provided on the outer peripheral surface of each of the first half and the second half. In use, the first half and the second half approach each other from the radial outside of the cylinder rod and are assembled together, such that the inner peripheral surfaces of the first half and the second half clamp the outer peripheral surface of the cylinder rod, and an elastic pad is provided between the inner peripheral surfaces of the first half and the second half and the outer peripheral surface of the cylinder rod.

Description

Technical Field

[0001] This utility model relates to a cylinder rod tightening tool, and more particularly to a cylinder rod tightening tool for tightening the threads of a cylinder rod. Background Technology

[0002] The hydraulic cylinder is connected to other components via a cylinder rod (or piston rod). Specifically, the threads on the cylinder rod engage with the head threads of other components. However, the threaded connection between the cylinder rod and the head threads can loosen under pressure, increasing the cylinder's stroke distance and ultimately causing the equipment to stop.

[0003] Therefore, the threads need to be tightened a second time. However, there is no suitable location for a wrench near the threads. If a chain wrench is used to tighten the threads, it needs to be placed on the outer circumference of the cylinder rod; however, doing so will damage the cylinder rod surface and cause hydraulic oil leakage. In addition, the chain wrench is prone to slipping and causing injury. Utility Model Content

[0004] The purpose of this utility model is to provide a cylinder rod tightening tool to solve at least one of the above problems. It has a simple structure, low cost, and is easy to implement. It can be directly fitted onto the cylinder rod for operation and can adapt to cylinder rods of different types and sizes as well as other parts that need to be tightened, thus having good versatility.

[0005] According to one aspect of the present invention, a cylinder rod tightening tool is provided. The cylinder rod tightening tool includes: a first half; and a second half, detachably connectable to the first half. At least one rod is provided on the outer peripheral surface of each of the first and second halves. In use, the first and second halves approach and assemble with each other from the radial outside of the cylinder rod, such that the inner peripheral surfaces of the first and second halves clamp the outer peripheral surface of the cylinder rod, and an elastic pad is provided between the inner peripheral surfaces of the first and second halves and the outer peripheral surface of the cylinder rod.

[0006] In one embodiment, each of the first half and the second half is provided with a flange at both ends in the circumferential direction.

[0007] In one embodiment, each flange is provided with at least one hole.

[0008] In one embodiment, in the assembled state, the flanges of the first half and the second half face each other, and fasteners pass through holes in the flanges to fasten the first half and the second half together.

[0009] In one embodiment, the surface of the flange is flush with the two ends of the first half and the second half in the circumferential direction.

[0010] In one embodiment, in the assembled state, there is a gap between the flange of the first half and the flange of the second half.

[0011] In one embodiment, in the assembled state, the inner circumferential surfaces of the first half and the second half constitute the inner circumferential surface of the cylinder rod tightening tool, wherein the inner circumferential surface of the cylinder rod tightening tool is prismatic.

[0012] In one embodiment, in the assembled state, the inner circumferential surfaces of the first half and the second half constitute the inner circumferential surface of the cylinder rod tightening tool, and the inner circumferential surface of the cylinder rod tightening tool is cylindrical.

[0013] In one embodiment, the outer diameter of the cylinder rod is D1, the thickness of the elastic pad is T, and the inner diameter of the inner circumferential surface of the cylinder rod tightening tool is D2, then D1≤D2≤D1+2T.

[0014] In one embodiment, the elastic pad is a rubber pad, a silicone pad, or a resin pad.

[0015] In one embodiment, a plurality of rods are disposed on the outer peripheral surface of each of the first half and the second half, which are evenly spaced apart in the circumferential direction.

[0016] In one embodiment, the fasteners are bolts and nuts.

[0017] In one embodiment, the first half and the second half are semi-cylindrical in shape.

[0018] In one embodiment, the resin pad includes a polyurethane pad. Attached Figure Description

[0019] To better understand the above and other objects, features, advantages, and functions of this utility model, reference can be made to the preferred embodiments shown in the accompanying drawings. The same reference numerals in the drawings refer to the same parts. Those skilled in the art should understand that the drawings are intended to schematically illustrate the preferred embodiments of this utility model and do not limit the scope of this utility model in any way; the parts in the drawings are not drawn to scale.

[0020] Figure 1 This is a top view of a cylinder rod tightening tool according to a preferred embodiment of the present invention.

[0021] Figure 2 This is a front view of a cylinder rod tightening tool according to a preferred embodiment of the present invention.

[0022] Figure 3 The cylinder rod tightening tool according to a preferred embodiment of the present invention has an edge Figure 1 A longitudinal cross-sectional view taken by the cutting line.

[0023] Figure 4 This is a top view of a cylinder rod tightening tool according to another preferred embodiment of the present invention. Detailed Implementation

[0024] Now, with reference to the accompanying drawings, specific embodiments of the present invention will be described in detail. The embodiments described herein are merely preferred embodiments of the present invention. Those skilled in the art can conceive of other ways to implement the present invention based on these preferred embodiments, and such other ways also fall within the scope of the present invention.

[0025] This document uses a hydraulic cylinder as an example to describe a cylinder rod tightening tool, but it is not limited to this. The cylinder rod tightening tool can also be applied to other types of cylinders (e.g., pneumatic cylinders) or used to tighten other types of parts, such as threaded cylindrical or polygonal parts. As long as the tightening tool of this disclosure can be fitted onto the outer circumferential surface of the part to be tightened and clamp or grip the outer circumferential surface, thereby applying torque to the part to tighten or secure it, it falls within the protection scope of this disclosure.

[0026] Taking a hydraulic cylinder as an example, as mentioned above, when the threaded connection between the cylinder rod or piston rod of the hydraulic cylinder and other components becomes loose, the cylinder rod tightening tool disclosed herein is fitted onto the cylinder rod, and the cylinder rod tightening tool is rotated to apply torque to the cylinder rod, thereby tightening the cylinder rod.

[0027] Figure 1 This is a top view of a cylinder rod tightening tool according to a preferred embodiment of the present invention. Figure 2 This is a front view of a cylinder rod tightening tool according to a preferred embodiment of the present invention. Figure 3 The cylinder rod tightening tool according to a preferred embodiment of the present invention has an edge Figure 1 A longitudinal cross-sectional view taken by the cutting line.

[0028] The cylinder rod tightening tool 100 is cylindrical in shape and has a split design, consisting of a first half 101 and a second half 102. The first half 101 and the second half 102 are structurally identical and are mirror-symmetrical when assembled. The split design means that the first half 101 and the second half 102 can be disassembled and separated from each other and can be assembled together. The purpose of the split design is to facilitate the application of the tool 100 to the cylinder rod. For example, when the cylinder rod is assembled, the tool 100 cannot be directly inserted into the cylinder rod from both ends in the longitudinal direction. Therefore, the first half 101 and the second half 102 of the tool 100 are positioned relatively close to the cylinder rod in the radial direction and semi-enclose the cylinder rod. When the inner circumferential surfaces of the first half 101 and the second half 102 are in contact with the outer circumferential surface of the cylinder rod, the first half 101 and the second half 102 are fastened together, so that the tool 100 clamps or grips the outer circumferential surface of the cylinder rod. Therefore, the inner circumferential surfaces of the first half 101 and the second half 102 are conformable to the outer diameter of the cylinder rod, that is, the inner circumferential surfaces of the first half 101 and the second half 102 are part of a circle.

[0029] like Figures 1 to 2 As shown, the first half 101 and the second half 102 are semi-cylindrical. When viewed along the longitudinal axis of symmetry of the tool 100, as... Figure 1 As shown in the top view, the first half 101 and the second half 102 are C-shaped. To facilitate the assembly of the first half 101 and the second half 102 together, flanges 200 are respectively provided on the outer peripheral surfaces of the first and second ends forming the C-shape (i.e., the two ends of the first half 101 and the second half 102 in the circumferential direction). Preferably, the surfaces of the flanges 200 are flush with or aligned with the surfaces of the two ends of the first half 101 and the second half 102 in the circumferential direction. Multiple holes are provided on the flanges 200, through which fasteners 300 pass to fasten the first half 101 and the second half 102 together. The figure shows two holes on each flange 200, thus a total of four sets of fasteners are used. The number of holes and fasteners is merely an example and is not limiting; each flange may have more or fewer holes depending on the actual application, for example, one hole, three holes, four holes, or other numbers of holes, and a corresponding number of fasteners. Examples of fasteners 300 include bolts and nuts, studs and nuts, pins, magnetic fasteners, and other types of fasteners commonly used in the art.

[0030] This document describes a cylindrical cylinder rod tightening tool 100 and a semi-cylindrical first half 101 and second half 102 as an example, but this is merely an example and not intended to be limiting. The cylinder rod tightening tool and the first and second halves can also be any other suitable shape. For example, the cylinder rod tightening tool can be a cuboid or prism, or other regular and irregular three-dimensional shapes. Correspondingly, the first and second halves can be any regular and irregular three-dimensional shapes, as long as the first and second halves can be assembled together to form a tool capable of tightening the cylinder rod, all of which are within the scope of this disclosure.

[0031] To facilitate the user in applying torque or tightening force, at least one rod 400 is provided on the first half 101 and the second half 102 respectively. Specifically, multiple rods are provided on the outer peripheral surfaces of the first half 101 and the second half 102, and the user rotates these rods to rotate the tool 100. Figures 1 to 3 Five rods are shown arranged on each half, evenly spaced circumferentially around the outer peripheral surface of the half, and arranged in a central radial plane perpendicular to the longitudinal axis of each half and located at the bisecting plane of the longitudinal length of each half. The number and arrangement of these rods are merely illustrative and not limiting; those skilled in the art can arrange other numbers and arrangements of rods according to specific applications. For example, one, two, three, four, six, or more rods can be arranged on each half, and these rods can be arranged on the outer peripheral surface of each half in any suitable manner in both the circumferential and longitudinal directions. For example, these rods can be arranged in any radial plane of each half in the longitudinal direction, such as not in the central longitudinal plane, but in any radial plane near either longitudinal end, away from the central longitudinal plane. Alternatively, the rods can not be arranged in the same radial plane, but staggered. Alternatively, the rods can also be non-uniformly arranged along the circumferential direction, with the circumferential angles between adjacent rods being different.

[0032] Furthermore, during operation, the tool 100 needs to clamp the outer peripheral surface of the cylinder rod and apply torque. Therefore, to protect the outer peripheral surface of the cylinder rod from scratches, an elastic pad of a certain thickness needs to be laid on the inner peripheral surface of the tool 100 to separate the cylinder rod from the tool. Specifically, corresponding to the construction of the tool 100, an elastic pad 500 is laid on the inner peripheral surface of the first half 101 and the second half 102, respectively. Each elastic pad 500 covers the inner peripheral surface of each half, so that when the tool 100 clamps the cylinder rod in each half, the entire outer peripheral surface of the cylinder rod is wrapped by two elastic pads 500, preventing contact with the tool and avoiding scratches and damage to the outer peripheral surface of the cylinder rod. Therefore, in practice, the elastic pad 500 is rectangular in shape, and when laid in the tool, it takes the form of a semi-cylindrical shape or a C-shape. The elastic pad 500 is made of a deformable elastic or flexible material, for example, the elastic pad can be a rubber pad, a silicone pad, or a resin pad (e.g., a polyurethane pad) or any other suitable elastic material commonly used in the art. There is no limit to the thickness of the elastic pad; instead, different thicknesses of elastic pads are used depending on the specific application.

[0033] It should be noted that, in order to facilitate the tool clamping the cylinder rod and applying torque, the thickness of the elastic pad 500 and the inner diameter of the tool 100 need to be specially designed according to the outer diameter of the cylinder rod, so that the dimensions of the three satisfy a certain relationship. In one embodiment, the outer diameter of the cylinder rod is D1, the thickness of the elastic pad 500 is T, and the inner diameter of the tool 100 is D2, then D1≤D2≤D1+2T.

[0034] Ideally, the elastic pad 500 wraps around the outer circumferential surface of the cylinder rod, and the inner circumferential surface of the tool 100 surrounds both the elastic pad and the cylinder rod. Considering the compression deformation of the elastic pad, D2 ≤ D1 + 2T. Furthermore, ideally, the inner circumferential surface of the tool 100 is completely in contact with the elastic pad, forming a full-surface contact between them. Therefore, the tool and cylinder rod are perfectly conformable and in close contact with each other, facilitating the transmission of force and load. However, in practical engineering, the tool and cylinder rod may not be in complete contact in all contact areas; gaps may form in some contact areas. It is sufficient to ensure that the tool and cylinder rod form a certain contact area and thus can transmit force and load.

[0035] There are two scenarios where the tool and cylinder rod are not fully in contact. The first scenario is that the inner diameter of the tool's inner circumference is larger than the outer diameter of the cylinder rod. In this case, the surrounding areas of the cylinder rod on opposite sides along the diameter direction are in contact with the tool, while the remaining areas are spaced apart. The second scenario is that the inner diameter of the tool's inner circumference is smaller than the outer diameter of the cylinder rod. In this case, in the cross-section, the inner diameter of each half of the tool intersects a chord of the cylinder rod's outer circumference at the two endpoints of the chord. That is, the tool applies force and load to the cylinder rod at these two intersection points. To facilitate the transmission of force and load, this disclosure preferably adopts the second scenario, i.e., D1≤D2≤D1+2T. For example, if the outer diameter D1 of the cylinder rod is 200mm and the thickness of the elastic pad 500 is 3mm, then the inner diameter D2 of the tool 100 can be set in the range of 200mm to 206mm, such as 203mm or 204mm. The thickness of the tool 100 is not limited, as long as it has sufficient rigidity and strength to apply the torque load to the cylinder rod.

[0036] Furthermore, to facilitate the application of force and load when the tool clamps the cylinder rod, the inner circumferential surface of the tool 100 is not a complete cylinder; that is, the inner circumferential surface of each half is not a complete semi-cylindrical shape, or each half is not a complete semi-cylindrical shape. Therefore, when the two halves of the tool 100 are clamped onto the cylinder rod, the first half 101 and the second half 102 do not contact each other, but rather have a gap. That is, the flange 200 of the first half 101 and the flange 200 of the second half 102 face each other but do not contact, leaving a gap. At this time, the fastener 300 passes through the hole in the flange 200, securing the flanges of the first half 101 and the second half 102 together. Figure 1 As can be seen, a gap exists. At this point, fastener 300 first applies a clamping force to the two halves of tool 100, causing the first half 101 and the second half 102 to move closer together. Then, the inner circumferential surfaces of the first half 101 and the second half 102 clamp the cylinder rod, applying clamping force and load to the elastic pad 500 and the cylinder rod. Next, the technician twists multiple rods 400, applying a torsional torque to the two halves of tool 100. Because the two halves of tool 100 clamp the elastic pad 500 and the cylinder rod, the cylinder rod rotates, thereby tightening the cylinder rod's threads. It should be noted that the size of the gap is not limited but is adjusted according to the outer diameter of the cylinder rod, the thickness of the elastic pad, and the inner diameter of the tool.

[0037] For tool 100, once it is manufactured, its inner diameter is a fixed size, but it can be used with cylinder rods of multiple sizes because the gap between the cylinder rod and the tool can be filled with elastic pads 500 of different thicknesses.

[0038] Figure 4 Another embodiment of the cylinder rod tightening tool is shown. This embodiment is similar to... Figures 1 to 3The embodiments are the same, except that the inner circumferential surface of tool 100 is not cylindrical, but prismatic. Figure 4 The tool 100 is shown to have an octagonal prism inner circumferential surface, but this is only an example. The inner circumferential surface of the tool can be any other number of prisms, such as hexagonal prisms, decanteric prisms, dodecagonal prisms, or any other polygonal prism. Due to the presence of the elastic pad 500, the prismal inner circumferential surface of the tool can contact the cylinder rod in certain areas through the elastic pad, clamping the cylinder rod and applying a torsional torque.

[0039] In addition, it should be noted that regardless of whether the inner circumferential surface of the tool is cylindrical or polygonal, the inner circumferential surface of the tool can be roughened in order to increase friction.

[0040] Tool 100 can be manufactured by various methods. The following describes one manufacturing process and method of the tool by way of example, not limitation. A 20mm thick steel plate is selected and cut into 12 smaller steel plates, each in the shape of a cuboid. Eight of the 12 smaller steel plates are arranged into a hollow octagonal prism shape, and then welded together to form a hollow octagonal prism. The inner and outer circumferential surfaces of the octagonal prism are machined into a cylinder using a lathe. The cylinder is sawn into two symmetrical halves along its diameter centerline, each half being a semi-cylindrical shape. It should be noted that when sawing along the centerline, it is not simply sawing the cylinder open, but rather sawing two pieces of material off the cylinder with the centerline as the axis of symmetry, so that each half is approximately a semi-cylindrical. Therefore, when the two halves are fitted onto the cylinder rod, they do not contact each other, but rather there is a gap between them.

[0041] The remaining four small steel plates are then welded to the two ends of each half in the circumferential direction, so that each small steel plate faces each other, forming two pairs of flanges. Multiple holes are made in each flange for fasteners to pass through, used to secure the paired flanges together. Fasteners can be, for example, bolts and nuts. Finally, multiple rods are welded to the outer circumferential surface of each half, which the technician can grip to rotate the tool.

[0042] In use, first, wrap an elastic pad around the outer circumferential surface of the cylinder rod. Then, move the two separate halves of the tool radially towards the cylinder rod. When the inner circumferential surfaces of the two halves are in contact with the cylinder rod and the elastic pad, the flanges of the two halves face each other with a gap between them, but do not touch. Pass the bolt through the hole in the flange and tighten the bolt and nut to secure the flanges together, thereby applying a clamping force and load between the two halves of the tool and the cylinder rod. Then, rotate the rod on the tool. Under the action of clamping force and friction, the tool applies a torsional torque to the cylinder rod, causing the cylinder rod to rotate and thus tightening the threads of the cylinder rod.

[0043] The cylinder rod tightening tool of this utility model has a simple structure, low cost, and is easy to implement. It can be directly fitted onto the cylinder rod for operation and can adapt to cylinder rods of different types and sizes as well as other parts that need to be tightened, thus having good versatility.

[0044] The above description of various embodiments of this utility model is provided for descriptive purposes to a person skilled in the art. It is not intended to exclude or limit the utility model to a single disclosed embodiment. As taught above, those skilled in the art will understand that various alternatives and variations of this utility model are possible. Therefore, although some alternative embodiments have been specifically described, those skilled in the art will understand or relatively easily develop other embodiments. This utility model is intended to include all alternatives, modifications, and variations of the utility model described herein, as well as other embodiments falling within the spirit and scope of the utility model described above.

[0045] Figure label: 100 cylinder rod tightening tool 101 Part 1 Part 2 of 102 200 flange 300 Fasteners 400 strokes 500 elastic pad D1 cylinder rod outer diameter D2 tool inner diameter Thickness of T-elastic pad

Claims

1. A cylinder rod tightening tool (100), characterized in that The cylinder rod tightening tool includes: Part One (101); and The second half (102) can be detachably connected to the first half (101). At least one rod (400) is provided on the outer peripheral surface of each of the first half (101) and the second half (102). In use, the first half (101) and the second half (102) are brought close to each other from the radial outside of the cylinder rod and assembled together, such that the inner circumferential surface of the first half (101) and the inner circumferential surface of the second half (102) clamp the outer circumferential surface of the cylinder rod, and an elastic pad (500) is provided between the inner circumferential surface of the first half (101) and the inner circumferential surface of the second half (102) and the outer circumferential surface of the cylinder rod.

2. The cylinder rod tightening tool (100) according to claim 1, characterized in that Each of the first half (101) and the second half (102) has a flange (200) at each of its two ends in the circumferential direction.

3. The cylinder rod tightening tool (100) according to claim 2, characterized in that Each flange (200) is provided with at least one hole.

4. The cylinder rod tightening tool (100) according to claim 3, characterized in that In the assembled state, the flanges (200) of the first half (101) and the flanges (200) of the second half (102) face each other, and fasteners (300) pass through holes in the flanges (200) to fasten the first half (101) and the second half (102) together.

5. The cylinder rod tightening tool (100) according to claim 2, characterized in that The surface of the flange (200) is flush with the two ends of the first half (101) and the second half (102) in the circumferential direction.

6. The cylinder rod tightening tool (100) according to claim 5, characterized in that In the assembled state, there is a gap between the flange (200) of the first half (101) and the flange (200) of the second half (102).

7. The cylinder rod tightening tool (100) according to claim 1, characterized in that In the assembled state, the inner circumferential surface of the first half (101) and the inner circumferential surface of the second half (102) constitute the inner circumferential surface of the cylinder rod tightening tool (100), and the inner circumferential surface of the cylinder rod tightening tool (100) is prismatic.

8. The cylinder rod tightening tool (100) according to claim 1, characterized in that, In the assembled state, the inner circumferential surface of the first half (101) and the inner circumferential surface of the second half (102) constitute the inner circumferential surface of the cylinder rod tightening tool (100), and the inner circumferential surface of the cylinder rod tightening tool (100) is cylindrical.

9. The cylinder rod tightening tool (100) according to claim 8, characterized in that The outer diameter of the cylinder rod is D1, the thickness of the elastic pad (500) is T, and the inner diameter of the inner circumferential surface of the cylinder rod tightening tool (100) is D2. Then D1≤D2≤D1+2T.

10. The cylinder rod tightening tool (100) according to claim 1, characterized in that The elastic pad is a rubber pad, a silicone pad, or a resin pad.

11. The cylinder rod tightening tool (100) according to claim 1, characterized in that On the outer peripheral surface of each of the first half (101) and the second half (102), a plurality of rods (400) are provided evenly spaced in the circumferential direction.

12. The cylinder rod tightening tool (100) according to claim 4, characterized in that The fasteners (300) are bolts and nuts.

13. The cylinder rod tightening tool (100) according to claim 1, characterized in that The first half (101) and the second half (102) are semi-cylindrical in shape.

14. The cylinder rod tightening tool (100) according to claim 10, characterized in that, Resin pads include polyurethane pads.

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