Adjustable shaft dismounting device

Abstract

The utility model discloses an adjustable shaft dismounting device, and belongs to the technical field of shaft dismounting. The device comprises a base and a bracket arranged on the base, the middle of the bracket is provided with a mounting space for mounting a riding wheel, the peripheral wall of the riding wheel is provided with an annular supporting part for supporting a shaft to be disassembled, and the section of the supporting part is an arc-shaped surface matched with the outer circumference of the shaft to be disassembled; first nuts are arranged at the positions, located at the two ends of the supporting wheel, of the base, the first nuts are provided with first adjusting bolts, and the first adjusting bolts are used for adjusting and limiting the axial position of the bracket. According to the utility model, the arc-shaped supporting surface is matched with the outer circumference of the shaft, so that the fitting degree between the supporting part and the shaft to be disassembled can be greatly improved; and meanwhile, through mutual matching of the first adjusting bolt and the first nut, the axial position of the riding wheel can be adjusted and limited, so that the riding wheel can be located under the shaft to be disassembled more accurately.

Description

Technical Field

[0001] The utility model belongs to the technical field of shaft system disassembly, and more specifically relates to an adjustable shaft disassembly device. Background Art

[0002] Flanges, as disc-shaped components, are most common in pipeline engineering. They are used to connect pipes by installing a flange plate on the pipe to be connected and then tightening the sealing point between the two flange plates with bolts to achieve the connection. This connection method is not only suitable for pipelines, but is also widely used to connect the inlet and outlet of equipment, such as reducer flanges, to ensure a tight connection between two devices.

[0003] When flange-connected shafts or power units with larger diameters require overhaul and disassembly, temporary supports and hoisting are often used to facilitate the removal of the flange end bolts. However, because traditional supports cannot guarantee a tight fit with the shaft to be disassembled, they can easily cause the shaft to sink, bulge, or become eccentric at the support points, resulting in surface wear and hindering safe disassembly.

[0004] After searching, the patent CN213081297U discloses an adjustable shaft removal device. The application includes a crowbar, a support seat and a connecting piece; the connecting piece is installed on the plane of the shaft; the support seat is against the engineering machinery equipment around the shaft to be removed, and the crowbar passes through the positioning hole on the support seat and then passes through the connecting piece. After pressing the crowbar downward with force, the crowbar moves upward with the connecting piece and the shaft, and the shaft is pulled out from the engineering machinery equipment by passing the crowbar through the positioning holes of different heights on the support seat. The application is applicable to the disassembly of shafts of different lengths and diameters, and shafts of different lengths and diameters can find suitable support points on the support seat during disassembly. Although the application can bring convenience to the maintenance and disassembly of shafts in large-scale engineering machinery, the problem of sinking, convexity or eccentricity of the shaft at the support force point has not been effectively solved. Utility Model Content

[0005] 1. Problems to be solved

[0006] In response to at least some of the problems existing in the above-mentioned prior art, the present invention proposes an adjustable shaft dismantling device, the purpose of which is to solve the problem that the existing shaft dismantling device cannot ensure the fit between the shaft to be dismantled, and easily causes the shaft to sink, bulge or be eccentric at the supporting force point.

[0007] 2. Technical solution

[0008] In order to solve the above problems, the technical solutions adopted by the present invention are as follows:

[0009] The utility model discloses an adjustable shaft removal device, comprising a base and a bracket arranged on the base, wherein a mounting space for a supporting wheel is provided in the middle of the bracket, and an annular supporting portion for supporting the shaft to be removed is provided on the outer peripheral wall of the supporting wheel, and the cross section of the supporting portion is an arc-shaped surface matching the outer circumference of the shaft to be removed;

[0010] A first nut is provided at both ends of the supporting wheel on the base. The first nut is equipped with a first adjusting bolt, which is used to adjust and limit the axial position of the bracket.

[0011] Furthermore, threaded holes are provided at the four corners of the bracket, and second adjusting bolts are provided in the threaded holes. The second adjusting bolts are used to adjust the height of the bracket.

[0012] Furthermore, the bracket is composed of a pair of vertical plates arranged opposite to each other and a bottom plate for connecting the two vertical plates; wherein, each side of the vertical plate has a lug, and the second adjusting bolt is arranged on the corresponding lug.

[0013] Furthermore, the supporting wheel is arranged between the two vertical plates through an axle pin, and the axle pin is equipped with a cotter pin.

[0014] Furthermore, a transition fit with a clearance of 0 to 0.30 mm is adopted between the inner hole of the supporting wheel and the outer diameter of the shaft pin.

[0015] Furthermore, an annular groove is machined on the inner hole wall of the supporting wheel along its axial direction, and the groove is used to reduce the contact area between the shaft pin and the hole wall.

[0016] Furthermore, the shaft disassembly device also includes a shaft clamp, and at least the portion of the shaft clamp that contacts the supporting wheel adopts a thickened design.

[0017] Furthermore, the shaft-holding clamp is sleeved on the shoulder of the shaft to be disassembled, and a protective pad is provided between the shaft-holding clamp and the shaft to be disassembled.

[0018] Furthermore, a stop gasket is provided between the end wall of the supporting wheel and the side wall of the corresponding vertical plate.

[0019] 3. Beneficial effects

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] (1) The utility model provides an adjustable shaft disassembly device, in which an annular support portion is provided on the outer peripheral wall of the supporting wheel, and the cross section of the supporting portion is an arc-shaped surface matching the outer circumference of the shaft to be disassembled; through the mutual cooperation of the arc-shaped support surface and the outer circumference of the shaft, the fit between the supporting portion and the shaft to be disassembled can be greatly improved, thereby avoiding a series of defects caused by the poor fit between the two; at the same time, through the mutual cooperation of the first adjusting bolt and the first nut, the axial position of the supporting wheel can be adjusted and limited, so that the supporting wheel can be more accurately located directly below the shaft to be disassembled, so as to further ensure the stability of the support for the shaft to be disassembled.

[0022] (2) The utility model provides an adjustable shaft disassembly device, wherein threaded holes are provided at the four corners of the bracket, and second adjusting bolts are provided in the threaded holes. Through the cooperation between the second adjusting bolts and the threaded holes, the height of the supporting wheel can be fine-tuned so that the supporting portion of the supporting wheel can be as close as possible to the bottom of the shaft to be disassembled, so as to prevent the bolts on the flange end face from being difficult to disassemble due to the sinking of the shaft to be disassembled.

[0023] (3) The utility model provides an adjustable shaft disassembly device, in which an annular groove is machined along the axial direction of the inner hole wall of the support wheel. The groove can reduce the contact area between the shaft pin and the hole wall, thereby facilitating the assembly operation between the two.

[0024] (4) The utility model provides an adjustable shaft removal device, which can protect the surface of the shaft to be removed from being scratched by providing a shaft clamp at the contact point between the shaft to be removed and the support part; in addition, by providing a protective pad between the shaft to be removed and the shaft clamp, the protective effect of the surface of the shaft to be removed can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a front view of an adjustable shaft removal device of the utility model;

[0026] Figure 2 This is a side view of an adjustable shaft removal device of the utility model;

[0027] Figure 3 for Figure 2 Cross-sectional view along the AA axis;

[0028] Figure 4 This is a schematic diagram of the internal structure of the supporting wheel in the utility model;

[0029] Figure 5 This is a schematic diagram of the cooperation between an adjustable shaft removal device and a shaft to be removed according to the utility model;

[0030] Figure 6 for Figure 5 The side view of .

[0031] In the figure: 1, base; 2, bracket; 21, vertical plate; 22, bottom plate; 3, supporting wheel; 31, supporting part; 32, groove;

[0032] 41. First adjusting bolt; 42. First nut; 5. Second adjusting bolt; 6. Axle pin; 61. Split pin; 7. Axle clamp; 8. Axle to be disassembled. DETAILED DESCRIPTION

[0033] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] The present invention will be further described below in conjunction with specific embodiments.

[0036] like Figure 1 As shown, an adjustable shaft removal device of this embodiment includes a base 1, a bracket 2 and a supporting roller 3. Among them, the base 1 serves as the supporting foundation of the entire device and is preferably a steel panel. The panel has sufficient strength to support and its length and width are larger than the chassis of the bracket 2. It is used to place the bracket 2 and ensure the installation and welding space of the lateral adjustment nut. The bracket 2 is located on the steel panel, and an installation space is opened at its center, and the supporting roller 3 is located in the installation space. The supporting roller 3 is mainly used to directly contact the shaft 8 to be removed and effectively support it.

[0037] Specifically, refer to Figure 2-Figure 4 As shown, the bracket 2 consists of a pair of opposed vertical plates 21 and a base plate 22 connecting the two vertical plates 21. The aforementioned mounting space is formed between the two vertical plates 21, and through-holes are provided at corresponding locations on the two vertical plates 21. An axle pin 6 passes through the through-holes in the vertical plates 21 and the center hole of the supporting roller 3, securing the supporting roller 3 between the two vertical plates. Furthermore, the axle pin 6 is equipped with a cotter pin 61, and a retaining washer is provided between the end wall of the supporting roller 3 and the side wall of the corresponding vertical plate 21 to prevent movement of the axle pin 6.

[0038] Furthermore, to facilitate the installation of the supporting roller 3 on the axle pin 6, in this embodiment, a transition fit with a clearance of 0 to 0.30 mm is employed between the inner hole of the supporting roller 3 and the outer diameter of the axle pin 6. An annular groove 32 is machined along the axial direction of the inner hole wall of the supporting roller 3 to reduce the contact area between the axle pin 6 and the hole wall. The provision of this groove 32 also reduces weight and saves costs. Preferably, the groove 32 is located at the center of the supporting roller 3, and its length does not exceed half the length of the supporting roller 3, where the length refers to the distance extending along the axial direction of the supporting roller 3.

[0039] An annular support portion 31 is provided on the outer peripheral wall of the supporting roller 3 for supporting the shaft 8 to be removed, and the cross-section of the support portion 31 is an arcuate surface that matches the outer circumference of the shaft 8 to be removed. The mutual cooperation between the arcuate support surface and the outer circumference of the shaft 8 to be removed can greatly improve the fit between the support portion 31 and the shaft 8 to be removed, while also evenly distributing the load, reducing concentrated stress, and improving the stability of the support. This can effectively prevent the shaft from shifting or tilting during the removal process, allowing the shaft 8 to be removed to remain in the correct position, thereby avoiding a series of defects such as sinking, convexity, or eccentricity of the shaft caused by poor fit between the two. In addition, the arcuate support surface can reduce contact friction with the shaft 8 to be removed, thereby reducing wear and damage and protecting the surface of the shaft 8 to be removed.

[0040] To ensure that the axial position of the supporting roller 3 is aligned with the axial position of the shaft 8 to be disassembled, and to ensure a tight fit between the two, in this embodiment, first nuts 42 are provided at both ends of the supporting roller 3 on the base 1, and the first nuts 42 are equipped with first adjustment bolts 41. The first adjustment bolts 41 can be used to adjust and limit the axial position of the bracket 2, so that the supporting roller 3 can be more accurately positioned directly below the shaft 8 to be disassembled.

[0041] In addition, each side of the vertical plate 21 has a lug with a threaded hole formed therein, and a second adjustment bolt 5 is installed in the threaded hole. The second adjustment bolt 5 cooperates with the threaded hole to fine-tune the height of the supporting roller 3, so that the support portion 31 of the supporting roller 3 can be as close as possible to the bottom of the shaft 8 to be removed, ensuring stable support for the shaft 8 to be removed and preventing the bolts on the flange end face from becoming difficult to remove due to the sinking of the shaft 8 to be removed.

[0042] refer to Figure 5 、 Figure 6 As shown, in order to minimize the surface damage of the shaft 8 to be disassembled, in this embodiment, a shaft clamp 7 is provided at the contact point between the shaft 8 to be disassembled and the support portion 31, and a protective pad is provided between the shaft 8 to be disassembled and the shaft clamp 7, so as to improve the protective effect of the surface of the shaft 8 to be disassembled through the dual protection of the shaft clamp 7 and the protective pad.

[0043] Preferably, the shaft clamp 7 is sleeved on the shoulder of the shaft 8 to be disassembled, and at least the portion of the shaft clamp 7 that contacts the supporting wheel 3 is thickened. At the same time, the protective pad can be a rubber pad.

[0044] The adjustable shaft disassembly device of this embodiment is used. According to the specific position of the shaft 8 to be disassembled, the base 1 is arranged below the shaft 8 to be disassembled. One to two or more suitable positions can be determined as appropriate, preferably at the shaft neck. Pay attention to ensure that the base 1 is as horizontal as possible and the area is large enough to place the bracket 2, and the center line of the shaft 8 to be disassembled is projected as centered as possible on the base 1. Measure and adjust the distance between the base 1 and the shaft 8 to be disassembled. It should be slightly larger than the height of the shaft disassembly device in the initial state (not raised); at the same time, it is necessary to ensure that the height of the shaft 8 to be disassembled exceeds the height of the shaft disassembly device in the initial state and is controlled within the stroke range of the second adjusting bolt 5 screw rod.

[0045] The shaft clamp 7 and the protective pad are installed on the outer surface of the shaft 8 to be disassembled, and the first adjusting bolt 41 and the second adjusting bolt 5 with sufficient thread feed stroke are selected; by continuously fine-tuning each phase, the support portion 31 of the support wheel 3 is made to fit the arc surface of the thickened portion at the bottom of the shaft clamp circle 7. For the sake of safety in disassembly, the shaft 8 to be disassembled can be protected by a crane or tied with a sling for protection, but it is necessary to ensure that the shaft 8 to be disassembled is not subjected to any external tension or the top force of the shaft disassembly device, until there is basically no gap between the arc support surface of the support portion 31 and the bottom of the shaft clamp circle 7, then this state can be maintained and the shaft end flange bolts can be removed. In addition, it should be noted that the adjustable shaft disassembly device of this embodiment is suitable for the disassembly operation of the horizontally arranged shaft system, and the horizontal adjustment and vertical adjustment of the bracket 2 need to be fine-tuned within the adjustment stroke of the corresponding adjustment bolt.

[0046] The above is a schematic description of the present invention and its embodiments, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by this and, without departing from the inventive purpose of the present invention, designs a structure and embodiment similar to the technical solution without inventiveness, they shall fall within the scope of protection of the present invention.

Claims

1. An adjustable shaft removal device, comprising a base (1) and a bracket (2) arranged on the base (1), characterized in that: The middle portion of the bracket (2) is provided with an installation space for installing a supporting wheel (3), and an annular supporting portion (31) for supporting the shaft (8) to be disassembled is provided on the outer peripheral wall of the supporting wheel (3), and the cross section of the supporting portion (31) is an arc-shaped surface matching the outer circumference of the shaft (8) to be disassembled; The base (1) is provided with a first nut (42) at both ends of the supporting wheel (3). The first nut (42) is equipped with a first adjusting bolt (41) for adjusting and limiting the axial position of the bracket (2).

2. The adjustable shaft removal device according to claim 1, characterized in that: Threaded holes are provided at the four corners of the bracket (2), and second adjusting bolts (5) are provided in the threaded holes. The second adjusting bolts (5) are used to adjust the height of the bracket (2).

3. The adjustable shaft removal device according to claim 2, characterized in that: The bracket (2) is composed of a pair of vertical plates (21) arranged opposite to each other and a bottom plate (22) for connecting the two vertical plates (21); wherein each side of the vertical plate (21) has a lug, and the second adjusting bolt (5) is arranged on the corresponding lug.

4. An adjustable shaft removal device according to any one of claims 1 to 3, characterized in that: The supporting wheel (3) is arranged between two vertical plates (21) via an axle pin (6), and the axle pin (6) is equipped with a cotter pin (61).

5. The adjustable shaft removal device according to claim 4, characterized in that: A transition fit with a clearance of 0 to 0.30 mm is adopted between the inner hole of the supporting wheel (3) and the outer diameter of the shaft pin (6).

6. The adjustable shaft removal device according to claim 5, characterized in that: The inner hole wall of the supporting wheel (3) is processed with an annular groove (32) along its axial direction. The groove (32) is used to reduce the contact area between the shaft pin (6) and the hole wall.

7. The adjustable shaft removal device according to claim 4, characterized in that: The shaft disassembling device further comprises a shaft clamp (7), and at least the portion of the shaft clamp (7) that contacts the supporting wheel (3) is designed to be thickened.

8. The adjustable shaft removal device according to claim 7, characterized in that: The shaft clamp (7) is sleeved on the shoulder of the shaft (8) to be disassembled, and a protective pad is provided between the shaft clamp (7) and the shaft (8) to be disassembled.

9. The adjustable shaft removal device according to claim 3, characterized in that: A stop washer is provided between the end wall of the supporting wheel (3) and the side wall of the corresponding vertical plate (21).

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