Internal pneumatic hydraulic part dismounting structure
By setting a pneumatic ring and connecting air passage holes on the shaft, the inner ring of the bearing is expanded using a high-pressure air source, which solves the problem of difficult disassembly of parts and realizes convenient disassembly of parts and reduces economic losses.
Patent Information
- Application Number
- CN202510884292.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-30
- Publication Date
- 2025-11-14
AI Technical Summary
In existing technologies, the transition fit or interference fit of some parts makes disassembly difficult. Conventional methods would result in scrapped parts and difficulties in procurement, affecting product use.
Design an internal pneumatic hydraulic component disassembly structure. By setting a pneumatic ring and connecting air passage hole on the shaft, a high-pressure air source is used to expand the inner ring of the bearing, changing the interference fit to a clearance fit to facilitate disassembly.
It enables convenient disassembly of parts, avoids parts scrapping and procurement difficulties, and reduces economic losses.
Smart Images
Figure CN120946697A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to an internal pneumatic-hydraulic component disassembly structure. Background Technology
[0002] In the assembly of components in a mechanism, some parts are fitted with transition fits or interference fits, making disassembly difficult. Destructive forced removal is often used, which not only scraps some parts but also results in significant economic losses due to the high value of the parts (e.g., high-precision bearings). Furthermore, the difficulty in procuring high-value parts can affect the subsequent use of the product. Summary of the Invention
[0003] To solve the above-mentioned technical problems, the present invention provides an internal pneumatic-hydraulic parts disassembly structure that is simple in structure and easy to operate.
[0004] The technical solution of the present invention to solve the above-mentioned technical problems is: an internal pneumatic hydraulic part disassembly structure, including a shaft and bearings, a plurality of bearings are installed on the shaft, a pneumatic ring is provided on the outer circle of the shaft corresponding to each bearing installation position, a plurality of connecting air passage holes are provided inside the shaft, one end of each connecting air passage hole is connected to a pneumatic ring; the other end of each connecting air passage hole is led out from the port of the shaft and serves as a high-pressure air inlet connected to a high-pressure air source.
[0005] In the aforementioned internal pneumatic hydraulic component disassembly structure, the bearing and shaft adopt a transition fit or interference fit.
[0006] In the aforementioned internal pneumatic hydraulic component disassembly structure, the pneumatic ring is an annular groove structure.
[0007] In the aforementioned internal pneumatic hydraulic component disassembly structure, the number of connecting air passage holes is the same as the number of bearings.
[0008] In the aforementioned internal pneumatic hydraulic component disassembly structure, a high-pressure air source enters the pneumatic ring through the connecting air passage hole. Under high pressure, a bearing inner ring expansion force is formed, causing the inner diameter of the bearing inner ring to increase slightly.
[0009] The beneficial effects of this invention are as follows: By changing the structure of the shaft at the bearing mating point and adding a pressure ring and connecting air passage hole, the main technical core of this invention is to set a pressure ring between the interference fit surfaces. The pressure ring serves as a pressurization space, and a high-pressure air source is allowed to enter the pressurization space through the connecting air passage hole. Under the action of high pressure, the interference fit becomes a "clearance fit", which facilitates the disassembly of parts. Attached Figure Description
[0010] Figure 1 This is a schematic diagram of the structure of the present invention. Detailed Implementation
[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0012] like Figure 1 As shown, an internal pneumatic-hydraulic component disassembly structure includes a shaft 1 and bearings 2. Several bearings 2 are mounted on the shaft 1, and the bearings 2 and the shaft 1 are fitted with a transition fit or an interference fit. A pneumatic ring 3 is provided on the outer circle of the shaft 1 at each bearing 2 mounting position. The pneumatic ring 3 has an annular groove structure. Several connecting air passage holes 4 are provided inside the shaft 1. The number of connecting air passage holes 4 is the same as the number of bearings 2. One end of each connecting air passage hole 4 is connected to a pneumatic ring 3. The other end of each connecting air passage hole 4 is led out from the port of the shaft 1 and serves as a high-pressure air inlet connected to a high-pressure air source.
[0013] High-pressure air enters the air pressure ring 3 through the connecting air passage 4, and under high pressure, it forms an expansion force on the inner ring of the bearing 2, causing the inner diameter of the inner ring of the bearing 2 to increase slightly.
[0014] This invention modifies the structure of the components of high-value parts by creating pressure within the holes or shafts 1 of these components. This causes a slight expansion or contraction of the holes or shafts 1, allowing the high-value parts to be moved and removed along the axial direction. In this embodiment, the disassembly of the shaft 1 and bearing 2 is taken as an example. The main change is to the structure of the shaft 1 at the point of contact with the bearing 2. This is achieved by adding a pressure ring 3 and a connecting air passage hole 4. In use, a high-pressure pipe is connected to the high-pressure air inlet. After confirming a secure and reliable connection, the high-pressure air source is opened. The high-pressure air enters the pressure ring 3 through the connecting air passage hole 4, creating an expansion force on the inner ring of the bearing 2 under high pressure. This slightly increases the inner diameter of the inner ring of the bearing 2, allowing it to be removed by applying force along the axial direction.
Claims
1. An internal pneumatic-hydraulic parts disassembly structure, characterized in that: The device includes a shaft and bearings. Several bearings are mounted on the shaft. A pneumatic ring is provided on the outer circle of the shaft at each bearing mounting position. Several connecting air passage holes are provided inside the shaft. One end of each connecting air passage hole is connected to a pneumatic ring. The other end of each connecting air passage hole is led out from the end of the shaft and serves as a high-pressure air inlet connected to a high-pressure air source.
2. The internal pneumatic-hydraulic parts disassembly structure according to claim 1, characterized in that: The bearing and the shaft are fitted with either a transition fit or an interference fit.
3. The internal pneumatic-hydraulic parts disassembly structure according to claim 1, characterized in that: The pressure ring has an annular groove structure.
4. The internal pneumatic-hydraulic parts disassembly structure according to claim 1, characterized in that: The number of connecting air passage holes is the same as the number of bearings.
5. The internal pneumatic-hydraulic parts disassembly structure according to claim 1, characterized in that: High-pressure air enters the air pressure ring through the connecting air passage, and under high pressure, it forms an expansion force on the inner ring of the bearing, causing the inner diameter of the inner ring of the bearing to increase slightly.