A high-precision floating chuck mechanism
By using a high-precision floating chuck mechanism with a coordinated design of floating chuck head and limiting components, the problems of clamping damage and adaptability of traditional motor shaft machining fixtures are solved, achieving efficient and precise machining and improving machining accuracy and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GENYUE MASCH TECH (WUXI) CO LTD
- Filing Date
- 2025-07-15
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional motor shaft machining fixtures have significant technical defects in terms of clamping accuracy and flexibility, including rigid chucks that easily damage the shaft surface, uneven clamping force distribution causing vibration, and lack of adaptive adjustment capabilities, resulting in low machining efficiency.
Employing a high-precision floating chuck mechanism, combined with the coordinated design of the floating chuck mechanism and limiting components, and through a spring-telescopic rod buffer structure and hydraulic drive device, it achieves bidirectional flexible clamping of the rotating shaft, providing multi-contact point support and quick changeover functionality.
It achieves a reduction of over 60% in the surface damage rate of the rotating shaft, uniform distribution of clamping force, and an expanded range of compatible diameters from 30 to 150 mm, improving machining accuracy and stability, supporting rapid model changeover, and enhancing machining efficiency.
Smart Images
Figure CN224274330U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of clamps, and in particular to a high-precision floating chuck mechanism. Background Technology
[0002] Traditional motor shaft machining fixtures suffer from significant technical deficiencies in terms of clamping accuracy and flexibility: First, rigid chuck clamping easily leads to indentations or coating damage on the shaft surface, especially affecting high-precision motor shafts; second, uneven clamping force distribution causes machining vibration, affecting the surface finish; third, they lack adaptive adjustment capabilities, making them unsuitable for shafts of different diameters or irregular shapes, requiring manual adjustment of the fixture structure during model changes, resulting in low efficiency. In existing technologies, some floating chucks use spring buffers to reduce clamping impact, but the buffer mechanism is separated from the drive unit, leading to a bulky structure and sluggish response. Furthermore, traditional support mechanisms are mostly fixed V-blocks with limited contact area, making the shaft prone to axial displacement during high-speed rotation, requiring frequent machine stops for calibration.
[0003] For high-efficiency machining scenarios of new energy motor shafts, existing problems are even more prominent: thin-walled shafts are prone to deformation due to rigid clamping; fixture changeover is time-consuming when producing multiple varieties in small batches; and the lack of integrated buffering and limiting design makes it difficult to balance clamping force and stability. There is an urgent need for a chuck mechanism that integrates high-precision floating clamping, adaptive limiting, and rapid changeover functions to solve the technical bottlenecks of high damage rate, poor adaptability, and low efficiency of traditional devices. Utility Model Content
[0004] This application provides a high-precision floating chuck mechanism, which solves the technical problem that in the prior art, some floating chucks in motor shaft machining fixtures reduce clamping impact through spring buffering, but the buffering mechanism is designed separately from the drive device, resulting in a bulky structure and slow response. At the same time, the lack of integrated buffering and limiting collaborative design makes it difficult to balance clamping force and stability.
[0005] The technical solution adopted in the embodiments of this application is as follows:
[0006] A high-precision floating chuck mechanism includes a base plate, clamping members for clamping both ends of a motor shaft, and a support member for supporting the motor shaft. The support member is located at the top center of the base plate. Two sets of clamping members are symmetrically arranged on the top of the base plate. Each clamping member includes a support seat mounted on the top of the base plate, a floating chuck mechanism for clamping one end of the motor shaft, and a rotating spindle for driving the floating chuck mechanism to rotate. The rotating spindle is mounted on the support seat. The floating chuck mechanism is located on the output end of the rotating spindle.
[0007] A further technical solution is as follows: the support member includes an arc-shaped support plate for supporting the motor shaft, a housing disposed at the top center of the base plate, a limiting member for limiting the motor shaft, and a driving device for driving the limiting member to swing; the arc-shaped support plate is disposed at the top of the housing; the top of the housing has two sets of rectangular openings symmetrically arranged with the arc-shaped support plate; the limiting member is oscillatingly connected to both sets of rectangular openings via pins; two sets of driving device driving ends are disposed on both sides of the housing and are respectively driven and connected to the corresponding limiting members.
[0008] A further technical solution is as follows: the limiting component includes a bending plate, a limiting plate for abutting against the motor shaft, a spring for buffering the limiting plate, a telescopic rod for limiting the spring, and a damping pad block disposed on the telescopic end of the telescopic rod; the bending plate is oscillatingly connected to the corresponding rectangular opening via a pin; the driving end of the driving device is drively connected to the bottom end of the bending plate; the spring is arranged around the telescopic rod; the other end of the telescopic rod is connected to the top end of the bending plate; the damping pad block is connected to the limiting plate; one end of the spring is connected to the damping pad block; the other end of the spring is connected to the bending plate.
[0009] A further technical solution is that the driving device is a hydraulic cylinder.
[0010] A further technical solution is as follows: the arc-shaped support plate has several sets of rubber pads arranged in an arc-shaped array on its arc-shaped surface.
[0011] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:
[0012] 1. Due to the adoption of a base plate, clamping components, and support components, this mechanism achieves bidirectional flexible clamping of the rotating shaft through the coordinated design of a floating chuck mechanism and limiting components. This results in uniform clamping force distribution and a reduction in surface damage rate of over 60%. The spring-telescopic rod buffer structure of the limiting components, combined with the precise drive of the drive unit, dynamically balances clamping force and stability, expanding the adaptable diameter range to 30-150mm. The rubber pads on the arc-shaped support plate provide multi-contact support, avoiding localized stress concentration on the rotating shaft. The modular design of the limiting and clamping components allows for rapid changeover, shortening non-machining time. The overall structure, through the integration of rigid drive and flexible buffering, overcomes the technical challenges of low precision, high damage rate, and poor adaptability of traditional chucks, providing a reliable solution for the efficient and precise machining of new energy motor rotating shafts. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the overall structure of a high-precision floating chuck mechanism in an embodiment of this utility model.
[0014] Figure 2 This is a partial structural diagram illustrating the clamping component in an embodiment of this utility model.
[0015] Figure 3 This is a partial structural schematic diagram illustrating the support member in an embodiment of this utility model.
[0016] Figure 4 This is a partial structural diagram illustrating the limiting component in an embodiment of this utility model.
[0017] In the diagram: 1. Base plate; 2. Clamping component; 3. Support component; 21. Support base; 22. Floating chuck mechanism; 23. Rotating spindle; 31. Arc-shaped support plate; 32. Housing; 33. Limiting component; 34. Drive device; 331. Bending plate; 332. Limiting plate; 333. Spring; 334. Telescopic rod; 335. Damping pad. Detailed Implementation
[0018] This application provides a high-precision floating chuck mechanism, which solves the technical problem that in the prior art, some floating chucks in motor shaft machining fixtures reduce clamping impact through spring buffering, but the buffering mechanism is designed separately from the drive device, resulting in a bulky structure and slow response. At the same time, the lack of integrated buffering and limiting collaborative design makes it difficult to balance clamping force and stability.
[0019] The technical solution in this application is to solve the above problems, and the overall approach is as follows:
[0020] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.
[0021] A high-precision floating chuck mechanism, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it includes a base plate 1, clamping members 2 for clamping both ends of the motor shaft, and a support member 3 for supporting the motor shaft; the support member 3 is located at the top center of the base plate 1; two sets of clamping members 2 are arranged symmetrically with the support member 3 on the top of the base plate 1; the clamping member 2 includes a support seat 21 installed on the top of the base plate 1, a floating chuck mechanism 22 for clamping one end of the motor shaft, and a rotating spindle 23 for driving the floating chuck mechanism 22 to rotate; the rotating spindle 23 is installed on the support seat 21; the floating chuck mechanism 22 is located on the output end of the rotating spindle 23.
[0022] The support member 3 includes an arc-shaped support plate 31 for supporting the motor shaft, a housing 32 located at the top center of the base plate 1, a limiting member 33 for limiting the motor shaft, and a driving device 34 for driving the limiting member 33 to swing. The arc-shaped support plate 31 is located on the top of the housing 32. The top of the housing 32 has two sets of rectangular openings symmetrically arranged with the arc-shaped support plate 31. The limiting member 33 is oscillatingly connected to both sets of rectangular openings by pins. Two sets of driving devices 34 are provided on both sides of the housing 32, and their driving ends are respectively connected to the corresponding limiting members 33.
[0023] The limiting component 33 includes a bending plate 331, a limiting plate 332 for abutting against the motor shaft, a spring 333 for buffering the limiting plate 332, a telescopic rod 334 for limiting the spring 333, and a damping pad 335 disposed on the telescopic end of the telescopic rod 334; the bending plate 331 is oscillatingly connected to the corresponding rectangular opening via a pin; the driving end of the driving device 34 is driven and connected to the bottom end of the bending plate 331; the spring 333 is arranged around the telescopic rod 334; the other end of the telescopic rod 334 is connected to the top end of the bending plate 331; the damping pad 335 is connected to the limiting plate 332; one end of the spring 333 is connected to the damping pad 335; the other end of the spring 333 is connected to the bending plate 331.
[0024] The drive unit 34 is a hydraulic cylinder.
[0025] Several sets of rubber pads arranged in an arc array are provided on the arc surface of the arc support plate 31.
[0026] Example
[0027] The high-precision floating chuck mechanism includes a base plate 1, with a support member 3 at the top center of the base plate 1. This support member 3 consists of a housing 32, an arc-shaped support plate 31, and a limiting member 33. The surface of the arc-shaped support plate 31 is provided with an arc-shaped array of rubber pads for flexibly supporting the rotating shaft. The top of the housing 32 has two sets of symmetrical rectangular openings. The limiting member 33 is hinged to the openings via pins. The limiting member 33 includes a bending plate 331, a limiting plate 332, and a spring 333-telescopic rod 334 buffer assembly. A drive device 34 drives the bending plate 331 to swing, thereby adjusting the position of the limiting plate 332. Clamping members 2 are symmetrically installed on both sides of the base plate 1. Each clamping member 2 includes a support base 21, a rotating spindle 23, and a floating chuck mechanism 22. The floating chuck mechanism 22 clamps the end of the rotating shaft via the rotating spindle 23.
[0028] Operating procedures
[0029] Shaft placement: The shaft is placed on the rubber pad of the arc support plate 31, and the drive device 34 pushes the bending plate 331 of the limiting member 33 to swing. The limiting plate 332 flexibly abuts against the side wall of the shaft through the spring 333.
[0030] End clamping: The rotating spindle 23 is activated to drive the floating chuck mechanism 22 to clamp both ends of the rotating shaft, and the buffer structure offsets the clamping impact;
[0031] Processing execution: When the shaft rotates, the damping pad 335 of the limit plate 332 and the spring 333 absorb vibration and ensure axial stability;
[0032] Adjustment: Adjust the stroke of the drive device 34 to change the angle of the limit plate 332 to adapt to shafts of different diameters;
[0033] Disassembly and maintenance: Loosen the floating chuck mechanism 22, reset the limit piece 33 of the drive device 34, and quickly remove the rotating shaft.
[0034] Beneficial effects
[0035] Thanks to the design of the base plate 1, clamping component 2, and support component 3, this mechanism achieves bidirectional flexible clamping of the rotating shaft through the coordinated design of the floating chuck mechanism 22 and the limiting component 33. This results in uniform clamping force distribution and a reduction in surface damage rate of over 60%. The spring 333-telescopic rod 334 buffer structure of the limiting component 33, combined with the precise drive of the drive device 34, dynamically balances clamping force and stability, expanding the adaptable diameter range to 30-150mm. The rubber pads of the arc-shaped support plate 31 provide multi-contact point support, preventing localized stress concentration on the rotating shaft. The modular design of the limiting component 33 and clamping component 2 supports rapid model changeover, shortening non-machining time. The overall structure, through the integration of rigid drive and flexible buffering, overcomes the technical challenges of low precision, high damage rate, and poor adaptability of traditional chucks, providing a reliable solution for the efficient and precise machining of new energy motor rotating shafts.
[0036] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.
[0037] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.
Claims
1. A high-precision floating chuck mechanism, characterized in that, The device includes a base plate (1), clamping members (2) for clamping the two ends of the motor shaft, and a support member (3) for supporting the motor shaft. The support member (3) is located at the top center of the base plate (1). The top of the base plate (1) is provided with two sets of clamping members (2) arranged symmetrically with the support member (3). The clamping member (2) includes a support seat (21) installed on the top of the base plate (1), a floating chuck mechanism (22) for clamping one end of the motor shaft, and a rotating spindle (23) for driving the floating chuck mechanism (22) to rotate. The rotating spindle (23) is installed on the support seat (21). The floating chuck mechanism (22) is located on the output end of the rotating spindle (23).
2. The high-precision floating chuck mechanism as described in claim 1, characterized in that, The support member (3) includes an arc-shaped support plate (31) for supporting the motor shaft, a housing (32) located at the top center of the base plate (1), a limiting member (33) for limiting the motor shaft, and a driving device (34) for driving the limiting member (33) to swing. The arc-shaped support plate (31) is located on the top of the housing (32). The top of the housing (32) has two sets of rectangular openings symmetrically arranged with the arc-shaped support plate (31). The limiting member (33) is oscillatingly connected to both sets of rectangular openings by a pin. The driving ends of the driving devices (34) are respectively connected to the corresponding limiting members (33) on both sides of the housing (32).
3. The high-precision floating chuck mechanism as described in claim 2, characterized in that, The limiting component (33) includes a bending plate (331), a limiting plate (332) for abutting against the motor shaft, a spring (333) for buffering the limiting plate (332), a telescopic rod (334) for limiting the spring (333), and a damping pad (335) disposed on the telescopic end of the telescopic rod (334); the bending plate (331) is oscillatingly connected to the corresponding rectangular opening by a pin; the driving end of the driving device (34) is driven and connected to the bottom end of the bending plate (331); the spring (333) is disposed around the telescopic rod (334); the other end of the telescopic rod (334) is connected to the top end of the bending plate (331); the damping pad (335) is connected to the limiting plate (332); one end of the spring (333) is connected to the damping pad (335); the other end of the spring (333) is connected to the bending plate (331).
4. A high-precision floating chuck mechanism as described in claim 3, characterized in that, The drive device (34) is a hydraulic cylinder.
5. A high-precision floating chuck mechanism as described in claim 4, characterized in that, The arc-shaped support plate (31) has several sets of rubber pads arranged in an arc-shaped array on its arc-shaped surface.