A centering tool for mounting a shaft part
By improving the alignment tooling for installing shaft parts, the center shaft and the roller body are made concentric by using the adjusting cylinder and locking nut, which solves the problems of low accuracy and misalignment in the traditional installation method and improves the installation accuracy and efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA COAL ZHANGJIAKOU COAL MINING MACHINERY
- Filing Date
- 2025-07-08
- Publication Date
- 2026-07-14
Smart Images

Figure CN224488843U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of parts installation technology, specifically to a centering tooling for installing shaft-type parts. Background Technology
[0002] In many mechanical systems, shafts play a crucial role in transmitting power and torque. Their installation accuracy has a significant impact on the performance and reliability of the entire mechanical system. The emergence of centering fixtures for shaft installation is related to some practical needs of shaft installation and the limitations of traditional methods. Centering fixtures for shaft installation are suitable for centering operations during the installation process of shafts to ensure that the shafts can be accurately installed in the target position.
[0003] Traditional installation methods struggle to guarantee high installation accuracy, while centering fixtures, through precise positioning and adjustment mechanisms, ensure that shaft parts are accurately installed in the target position, improving installation precision. During the installation of shaft parts, using unsuitable fixtures or installation methods can damage the surface of the parts, affecting their service life and performance. Traditional shaft part installation processes are cumbersome, requiring significant time and manpower for positioning and adjustment. Centering fixtures simplify the installation process, improve efficiency, and eliminate centering deviations that occur when using fixtures in practical applications. Furthermore, installing one side and then placing the other side horizontally can cause the shaft to tilt or shift. Utility Model Content
[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a centering tool for installing shaft parts, which solves the problem of tilting and offset during shaft installation in the prior art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a centering fixture for mounting shaft parts, comprising a body assembly and a connecting assembly, wherein an mounting assembly is provided inside the body assembly, a fixture assembly is provided inside the connecting assembly, and an adjustment assembly is provided inside the fixture assembly.
[0006] Optionally, the body assembly includes a roller body, and a central shaft is fitted inside the roller body.
[0007] Optionally, the mounting assembly includes a sealing seat and an end cap. The side of the sealing seat is in rotatable contact with the inside of the roller body. The inside of the sealing seat is connected to the side of the central shaft via a key. The side of the end cap is fixedly connected to the inside of the roller body. The inside of the end cap is rotatably connected to the side of the central shaft. Both the sealing seat and the end cap are equipped with floating sealing rings, and the two sets of floating sealing rings are in contact with each other for use.
[0008] Optionally, the connecting component includes a support base, the support base having a through hole inside and a slot on the side of the support base.
[0009] Optionally, the tooling assembly includes a free end tooling, the side of which is connected to the interior of the through hole, and the free end tooling has a threaded hole, the interior of which is connected to one end of the roller body by a bolt.
[0010] Optionally, the adjusting assembly includes an adjusting cylinder, the surface of which is threadedly connected to the inside of the free end tooling, one end of which is configured as a prismatic end, and a locking nut is threadedly connected to the surface of the adjusting cylinder.
[0011] This utility model provides a centering fixture for mounting shaft-type parts, which has the following advantages:
[0012] The centering fixture for installing this type of shaft part rotates by rotating the rhomboid end in conjunction with the adjusting cylinder, causing the adjusting cylinder to rotate inside the free end fixture. This allows the adjusting cylinder to push the central shaft to move. Since one end of the central shaft is assembled with the adjusting cylinder, the outer circle of the central shaft is kept concentric with the inner circle of the roller body while the central shaft moves. This ensures precise centering and stable installation of the central shaft. The locking nut limits and locks the adjusting cylinder thread during rotation and movement, ensuring the flatness requirements of the sealing seat and the floating seal ring inside the end cover. This prevents centering deviations when the fixture is not used. Furthermore, when assembling the central shaft and roller body, if one side is installed and the other side is placed horizontally, the central shaft may tilt or shift. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the installation component structure of this utility model;
[0014] Figure 2 This is a schematic diagram of the connection component structure of this utility model;
[0015] Figure 3 This is a schematic diagram of the main body component structure of this utility model;
[0016] Figure 4 This is a schematic diagram of the adjustment component structure of this utility model;
[0017] In the diagram: 1. Body assembly; 101. Roller body; 102. Central shaft; 2. Mounting assembly; 201. Sealing seat; 202. End cap; 203. Floating seal ring; 3. Connecting assembly; 301. Support seat; 302. Through hole; 303. Slot; 4. Tooling assembly; 401. Free end tooling; 402. Threaded hole; 5. Adjusting assembly; 501. Adjusting cylinder; 502. Prismatic end; 503. Locking nut. Detailed Implementation
[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0019] Please see Figures 1 to 4 This utility model provides a centering fixture for installing shaft-type parts. This embodiment improves the structure of the centering fixture to achieve precise centering. Specifically, taking a shaft-type installation fixture as an example, as a preferred solution in this embodiment, the shaft-type installation fixture is specifically a centering fixture for installing shaft-type parts, capable of precise centering during shaft-type part installation.
[0020] Please see Figures 1 to 4 This utility model provides a technical solution: a centering fixture for installing shaft parts, which is mainly used in the installation of shaft parts.
[0021] The main body component 1 has an installation component 2 inside, the connecting component 3 has a tooling component 4 inside, and the tooling component 4 has an adjustment component 5 inside.
[0022] In the above embodiments, as a preferred option, the main body assembly 1 includes a roller body 101, and a central shaft 102 is installed inside the roller body 101. The central shaft 102 is installed inside the roller body 101 and ensures that the outer circle of the central shaft 102 is concentric with the inner circle of the roller body 101.
[0023] In the above embodiment, as a preferred solution, the mounting component 2 includes a sealing seat 201 and an end cap 202. The side of the sealing seat 201 is in rotatable contact with the inside of the roller body 101, and the inside of the sealing seat 201 is connected to the side of the central shaft 102 by a key. The side of the end cap 202 is fixedly connected to the inside of the roller body 101, and the inside of the end cap 202 is rotatably connected to the side of the central shaft 102. Floating sealing rings 203 are installed inside both the sealing seat 201 and the end cap 202. The two sets of floating sealing rings 203 are in contact with each other and used in cooperation. By using this centering fixture to install the central shaft 102 inside the roller body 101, the flatness requirements of the floating sealing ring 203 components inside the sealing seat 201 and the end cap 202 can be guaranteed, making them more precise and stable.
[0024] In the above embodiments, as a preferred solution, the connecting component 3 includes a support base 301, the support base 301 has a through hole 302 inside, and a slot 303 is opened on the side of the support base 301. The free end tooling 401 is set in the through hole 302 inside the support base 301. At the same time, the slot 303 can facilitate the operation of the centering tooling when installing shaft parts.
[0025] In the above embodiments, as a preferred option, the tooling assembly 4 includes a free end tooling 401. The side of the free end tooling 401 is connected to the inside of the through hole 302. The free end tooling 401 has a threaded hole 402. The inside of the threaded hole 402 is connected to one end of the roller body 101 by bolts. When it is installed inside the roller body 101 by the central shaft 102, the fixed end tooling is fastened to one end of the roller body 101 by bolts to fix the roller body 101. At the same time, the free end tooling 401 is fastened to the other end of the roller body 101 by bolts and is supported by the support seat 301.
[0026] In the above embodiment, as a preferred solution, the adjusting assembly 5 includes an adjusting cylinder 501. The surface of the adjusting cylinder 501 is threadedly connected to the inside of the free end fixture 401. One end of the adjusting cylinder 501 is configured as a prismatic end 502. A locking nut 503 is threadedly connected to the surface of the adjusting cylinder 501. By rotating the prismatic end 502, the adjusting cylinder 501 rotates, thereby causing the adjusting cylinder 501 to rotate inside the free end fixture 401. This allows the adjusting cylinder 501 to push the central shaft 102 to move. Since one end of the central shaft 102 is connected to the adjusting cylinder 501... The assembly ensures that the outer circle of the central shaft 102 is concentric with the inner circle of the roller body 101 while it moves. At the same time, the central shaft 102 is precisely aligned and stably installed. The locking nut 503 limits and locks the adjusting cylinder 501 when it rotates, ensuring the flatness requirements of the sealing seat 201 and the floating sealing ring 203 inside the end cover 202. This avoids alignment deviations when the tooling is not used. Furthermore, when the central shaft 102 and roller body 101 are assembled, if one side is installed and the other side is placed horizontally, the central shaft 102 may tilt or shift.
[0027] In this invention, the working steps of the device are as follows:
[0028] 1. When the central shaft 102 is installed inside the roller body 101, the fixed end tooling is fastened to one end of the roller body 101 by bolts to fix the roller body 101. At the same time, the free end tooling 401 is fastened to the other end of the roller body 101 by bolts and is supported in conjunction with the support base 301. The free end tooling 401 is set in the through hole 302 inside the support base 301, and the slot 303 is opened to facilitate the operation of the centering tooling when installing shaft parts.
[0029] 2. Rotate the prismatic end 502 to cooperate with the adjusting cylinder 501 to rotate, so that the adjusting cylinder 501 rotates inside the free end tooling 401, so that the adjusting cylinder 501 pushes the central shaft 102 to move. Since one end of the central shaft 102 is assembled with the adjusting cylinder 501, the outer circle of the central shaft 102 can be kept concentric with the inner circle of the roller body 101 while moving. The concentric tooling is installed inside the roller body 101 to ensure the flatness requirements of the sealing seat 201 and the floating sealing ring 203 assembly inside the end cover 202, so as to make it more accurate and stable.
[0030] 3. The central shaft 102 is installed inside the roller body 101, ensuring that the outer circle of the central shaft 102 is concentric with the inner circle of the roller body 101. The central shaft 102 is precisely aligned and stably installed during installation. The locking nut 503 limits and locks the adjusting cylinder 501 when it rotates and moves, ensuring the flatness requirements of the sealing seat 201 and the floating sealing ring 203 inside the end cover 202. This avoids alignment deviations when the tooling is not used. Also, when the central shaft 102 and roller body 101 are assembled, if one side is installed and the other side is placed horizontally, the central shaft 102 may tilt or shift.
[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A centering fixture for mounting shaft-type parts, comprising a body assembly (1) and a connecting assembly (3), characterized in that: An installation component (2) is provided inside the main body component (1), a tooling component (4) is provided inside the connecting component (3), and an adjustment component (5) is provided inside the tooling component (4).
2. The centering fixture for mounting shaft-type parts according to claim 1, characterized in that: The main body assembly (1) includes a roller body (101), and a central shaft (102) is fitted inside the roller body (101).
3. The centering fixture for mounting shaft-type parts according to claim 2, characterized in that: The mounting assembly (2) includes a sealing seat (201) and an end cap (202). The side of the sealing seat (201) is in rotatable contact with the inside of the roller body (101). The inside of the sealing seat (201) is connected to the side of the central shaft (102) by a key. The side of the end cap (202) is fixedly connected to the inside of the roller body (101). The inside of the end cap (202) is rotatably connected to the side of the central shaft (102). Both the sealing seat (201) and the end cap (202) are equipped with floating sealing rings (203). The two sets of floating sealing rings (203) are in contact with each other and used together.
4. The centering fixture for mounting shaft-type parts according to claim 1, characterized in that: The connecting component (3) includes a support base (301), the inside of which is provided with a through hole (302), and the side of which is provided with a slot (303).
5. The centering fixture for mounting shaft-type parts according to claim 4, characterized in that: The tooling assembly (4) includes a free end tooling (401), the side of which is connected to the inside of the through hole (302), and a threaded hole (402) is provided on the free end tooling (401). The inside of the threaded hole (402) is connected to one end of the roller body (101) by bolts.
6. The centering fixture for mounting shaft-type parts according to claim 5, characterized in that: The adjustment assembly (5) includes an adjustment cylinder (501), the surface of which is threadedly connected to the inside of the free end tooling (401), one end of which is set as a prismatic end (502), and a locking nut (503) is threadedly connected to the surface of the adjustment cylinder (501).