Self-centering mechanism
By designing a floating shaft and a fixed shaft, combined with a thrust ball bearing and guide screws, the problem of inaccurate positioning in traditional self-centering mechanisms is solved, achieving precise positioning and stable press-fitting of workpieces.
Patent Information
- Application Number
- CN202423263315.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Traditional self-centering mechanisms are not effective in positioning workpieces, and are prone to wobbling and difficulty in accurate resetting, which affects the quality of press-fitted products.
It adopts a floating shaft and fixed shaft structure. The floating shaft is equipped with a thrust ball bearing and a round nut. The guide screw is slidably connected to the keyway to achieve micro-floating and circumferential limit, ensuring accurate positioning of the workpiece.
It enables the workpiece to automatically adapt to initial deviations and quickly return to its original position, thereby improving assembly accuracy and product performance stability.
Smart Images
Figure CN223881557U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a self-centering mechanism field especially relates to a self-centering mechanism. BACKGROUND
[0002] The self-centering mechanism can move synchronously at the same speed, and the workpiece can be automatically adjusted to the center position during clamping, so that the position deviation of the workpiece can be adjusted and the pressure can be uniformly distributed on the workpiece during pressing, so that the workpiece can be accurately aligned, thereby improving the assembly precision and the service life and performance stability of the product.
[0003] The traditional self-centering mechanism has poor centering and positioning effect, and the workpiece is prone to shaking, and the workpiece is difficult to accurately reset during operation, so that the position of the workpiece gradually deviates during continuous processing, thereby further affecting the quality of the pressed product.
[0004] Therefore, the self-centering mechanism is provided to solve the problems in the background. SUMMARY
[0005] The self-centering mechanism sets the floating shaft and the fixed shaft, sets the thrust ball bearing on the floating shaft to share the axial load, and makes the floating shaft have a small floating function relative to the fixed shaft, so that the self-centering mechanism can automatically adapt to the initial deviation of the workpiece and reset during the bearing pressing operation, and sets the key groove on the floating shaft and the guide screw on the fixed shaft, and limits the movement of the floating shaft in the circumferential direction through the sliding connection of the guide screw and the key groove, so that the floating shaft can keep a stable shaft center position in the circumferential direction and quickly recover when a small deviation occurs.
[0006] To achieve the above object, the utility model provides the following technical scheme:
[0007] A self-centering mechanism comprises a plurality of round nuts and a floating shaft, the lower surface of the round nut is provided with a gasket, the lower surface of the gasket is provided with an upper thrust ball bearing, the lower end of the shaft body of the floating shaft is sleeved with a lower thrust ball bearing, and the shaft body of the floating shaft is sleeved with a fixed shaft.
[0008] Through the above technical scheme, the self-centering mechanism sets the floating shaft and the fixed shaft to facilitate self-centering of the workpiece, and sets the thrust ball bearing and the round nut on the floating shaft to facilitate quick resetting of the floating shaft after a small floating occurs, thereby ensuring the accuracy of the centering of the device.
[0009] Further, the round nut is threadedly connected with the floating shaft.
[0010] By the above technical scheme, the round nut is connected with the floating shaft to fix the bearing and the floating shaft, and the axial fixation of the floating shaft is maintained.
[0011] Further, the shaft body of the fixed shaft is provided with a guide screw, and the middle part of the shaft body of the floating shaft is provided with a key groove.
[0012] By the above technical scheme, the guide screw is arranged to limit the floating shaft, and the key groove is arranged to cooperate with the guide screw to limit the floating shaft.
[0013] Further, the guide screw is slidably connected with the key groove.
[0014] By the above technical scheme, the floating shaft can be reset while having a slight floating, and the rotation of the floating shaft in the circumferential direction is prevented.
[0015] Further, the upper and lower thrust ball bearings are provided with thrust ball bearing plates away from the outer wall of the middle part of the floating shaft.
[0016] By the above technical scheme, the thrust ball bearing plates are arranged to support and position the bearing, and the load borne by the bearing is dispersed, so that the contact stress and wear of the bearing are reduced.
[0017] Further, the middle part of the shaft body of the floating shaft is sleeved with a plurality of O-rings.
[0018] By the above technical scheme, the O-rings play a sealing role, and also have a certain damping and buffering effect.
[0019] Further, the upper thrust ball bearing and the gasket are sleeved on the upper end of the shaft body of the floating shaft.
[0020] By the above technical scheme, the gasket is arranged to avoid the direct contact between the round nut and the bearing, so that the wear of the bearing is avoided, and the use effect of the bearing is affected.
[0021] The self-centering mechanism has the following beneficial effects:
[0022] 1. The self-centering mechanism has the following beneficial effects:
[0023] 2. The self-centering mechanism, compared with most self-centering mechanisms, sets a key groove on the floating shaft, sets a guide screw on the fixed shaft, limits the movement of the floating shaft in the circumferential direction through the sliding connection of the guide screw and the key groove, ensures the stable shaft center position of the floating shaft in the circumferential direction, and can quickly recover when a slight deviation occurs. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1 A structure diagram of the self-centering mechanism is provided.
[0025] Figure 2 A sectional view of the self-centering mechanism is provided.
[0026] Figure 3 A structure diagram of the guide screw in the self-centering mechanism is provided.
[0027] Figure 4 A structure diagram of the floating shaft in the self-centering mechanism is provided.
[0028] Figure 5 A structure diagram of the bearing in the self-centering mechanism is provided.
[0029] Legend:
[0030] 1, round nut; 2, upper thrust ball bearing; 3, O-ring; 4, floating shaft; 5, fixed shaft; 6, gasket; 7, guide screw; 8, lower thrust ball bearing; 9, key groove; 10, thrust ball bearing plate. DETAILED DESCRIPTION
[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0032] An embodiment provided by the present application:
[0033] Reference Figure 1 and Figure 2 A self-centering mechanism, comprising a plurality of round nuts 1 and a floating shaft 4, the lower surface of the round nut 1 is provided with a gasket 6, the lower surface of the gasket 6 is provided with an upper thrust ball bearing 2, the lower end of the shaft body of the floating shaft 4 is sleeved with a lower thrust ball bearing 8, and the shaft body of the floating shaft 4 is sleeved with a fixed shaft 5.
[0034] The self-centering mechanism is provided with the floating shaft 4 and the fixed shaft 5 to facilitate self-centering of the workpiece, and the floating shaft 4 is provided with the thrust ball bearing and the round nut 1 to facilitate quick resetting of the floating shaft 4 after slight floating, thereby ensuring the accuracy of centering of the device.
[0035] With reference to Figure 1 , Figure 3 and Figure 4 , the round nut 1 is threadedly connected with the floating shaft 4, the connection of the round nut 1 and the floating shaft 4 facilitates fixing of the round nut 1 and the floating shaft 4, maintains axial fixation of the floating shaft 4, the shaft body of the fixed shaft 5 is provided with the guide screw 7, the guide screw 7 is provided to facilitate limiting of the floating shaft 4, the middle part of the shaft body of the floating shaft 4 is provided with the key groove 9, the key groove 9 is provided to facilitate cooperation with the guide screw 7 to limit the floating shaft 4, the guide screw 7 is slidably connected with the key groove 9, the floating shaft 4 can be reset while having slight floating, and rotation of the floating shaft 4 in the circumferential direction is prevented;
[0036] With reference to Figure 2 , Figure 3 and Figure 5 , the upper thrust ball bearing 2 and the lower thrust ball bearing 8 are provided with the thrust ball bearing plate 10 away from the outer wall of one side of the middle part of the floating shaft 4, the thrust ball bearing plate 10 is provided to facilitate supporting and positioning of the bearing, simultaneously disperses the load borne by the bearing, thereby reducing the contact stress and wear of the bearing, the middle part of the shaft body of the floating shaft 4 is sleeved with a plurality of O-rings 3, the O-rings 3 play a sealing role, and simultaneously play a certain damping and buffering effect, the upper thrust ball bearing 2 and the gasket 6 are sleeved on the upper end of the shaft body of the floating shaft 4, the gasket 6 is provided to avoid direct contact of the round nut 1 with the bearing, thereby preventing wear and affecting the use effect of the bearing.
[0037] Working principle: the self-centering mechanism is provided with the thrust ball bearing on the shaft body of the floating shaft 4, the bearing is fixed on the floating shaft 4 through the round nut 1, the fixed shaft 5 is fixed when used for press fitting, the shaft head of the floating shaft 4 is in contact with the workpiece, cooperation of the guide screw 7 and the key groove 9 prevents rotation of the floating shaft 4 in the circumferential direction, cooperation of the thrust ball bearing and the thrust ball bearing plate 10 enables the floating shaft 4 to have slight floating, ensures that the floating shaft 4 can adapt to the initial deviation of the workpiece and reset, thereby ensuring accurate positioning of the workpiece.
[0038] Finally, it should be noted that: the above only describes preferred embodiments of the present application and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement of some technical features, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A self-centering mechanism comprising a plurality of round nuts (1) and a floating shaft (4), characterized in that: The lower surface of the round nut (1) is provided with a gasket (6), the lower surface of the gasket (6) is provided with an upper thrust ball bearing (2), the lower end of the shaft body of the floating shaft (4) is sleeved with a lower thrust ball bearing (8), and the shaft body of the floating shaft (4) is sleeved with a fixed shaft (5).
2. A self-centering mechanism according to claim 1, characterized in that: The round nut (1) is threadedly connected with the floating shaft (4).
3. A self-centering mechanism according to claim 1, wherein: The shaft body of the fixed shaft (5) is provided with a guide screw (7), and the middle part of the shaft body of the floating shaft (4) is provided with a key groove (9).
4. A self-centering mechanism according to claim 3, wherein: The guide screw (7) is in sliding connection with the key groove (9).
5. A self-centering mechanism according to claim 1, wherein: The outer walls of the upper thrust ball bearing (2) and the lower thrust ball bearing (8) away from the middle part of the floating shaft (4) are both provided with thrust ball bearing plates (10).
6. A self-centering mechanism according to claim 1, wherein: The middle part of the shaft body of the floating shaft (4) is sleeved with a plurality of O-rings (3).
7. A self-centering mechanism according to claim 1, wherein: The upper thrust ball bearing (2) and the gasket (6) are both sleeved on the upper end of the shaft body of the floating shaft (4).