膨胀芯轴
By designing a frustum-shaped shaft and an adjustable diameter chuck structure for the expansion mandrel, the problem of limited mandrel size was solved, enabling the same mandrel to be adapted to the inspection of gears of different sizes, reducing costs and improving inspection efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YIFEI XINNENG (SUZHOU) GEAR MANUFACTURING CO LTD
- Filing Date
- 2025-08-19
- Publication Date
- 2026-07-17
AI Technical Summary
In the existing technology, the size of the mandrel is limited, which leads to the need to prepare a large number of mandrels of different sizes to adapt to the inspection of gears of different sizes, increasing the inspection cost and resource consumption.
An expandable mandrel is designed, which adopts a frustum-shaped shaft and an adjustable diameter chuck structure. Through the combination of the sliding groove and the chuck, it can adaptively clamp gears of different sizes. The diameter of the chuck changes with the diameter of the shaft, increasing the contact area and reducing stress concentration.
This technology enables the same mandrel to be used for the inspection of gears of different sizes, reducing inspection costs, minimizing resource consumption, and improving inspection efficiency.
Smart Images
Figure CN224509476U_ABST
Abstract
Claims
1. An expansion mandrel characterized by: Includes a shaft (1), which is frustum-shaped. Multiple grooves (2) are provided on the shaft (1). Each groove (2) is provided with a pawl (3). A sleeve (4) is fitted on the pawl (3). The distance between the top of the pawl (3) and the axis of the shaft (1) is greater than the distance between the bottom of the pawl (3) and the axis of the shaft (1).
2. The inflatable mandrel of claim 1, wherein: The side of the claw (3) facing the sleeve (4) is an arc surface. The diameter of the arc surface of the claw (3) increases with the diameter of the shaft (1). The center of the arc of the claw (3) is on the axis of the shaft (1).
3. The inflatable mandrel of claim 1, wherein: The sleeve (4) has a positioning hole (7), the claw (3) has a clearance hole (8), the shaft (1) has a locking hole (10), the positioning hole (7) has a fastening screw (11), and the fastening screw (11) extends into the locking hole (10) through the clearance hole (8).
4. The inflatable mandrel of claim 3, wherein: The claw (3) has a sliding hole (9) that communicates with the relief hole (8) on the side facing the shaft (1). A slider (14) is provided in the sliding hole (9). A second spring (13) is provided on the side of the slider (14) facing the relief hole (8). A connecting hole (15) is provided on the slider (14) for the fastening screw (11) to enter.
5. The inflatable mandrel of claim 4, wherein: The sliding hole (9) is provided with a guide sleeve (12), and the second spring (13) is sleeved on the guide sleeve (12).
6. The inflatable mandrel of claim 4, wherein: The fastening screw (11) has a thread inside the positioning hole (7) and is divided into a smooth rod inside the relief hole (8).
7. The inflatable mandrel of claim 5, wherein: The fastening screw (11) has a retaining ring (16) at one end inside the retaining hole (10).
8. The inflatable mandrel of claim 1, wherein: The claw (3) has a slot (5), and a first spring (6) is provided in the slot (5).