Buffer type main shaft output mechanism
By using a buffered spindle output mechanism and a combination design of gearbox, bushing and shaft, the power buffer of small machine tool spindles under load fluctuations is realized, which solves the problem of high rigidity requirements in the existing technology, reduces cost and heat dissipation burden, and improves output stability.
Patent Information
- Application Number
- CN202520538532.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2026-02-06
- Estimated Expiration
- 2035-03-26
AI Technical Summary
Existing small machine tool spindles are difficult to effectively buffer when the load fluctuates, resulting in high rigidity requirements, which increases the heat dissipation burden and design difficulty of the electric spindle, and increases the cost.
The main shaft output mechanism adopts a buffer type. Through the combination design of gearbox, bushing, shaft and torsion spring, torque is transmitted by worm gear and the power buffer is achieved by the synchronous hysteresis between bushing and shaft, which enhances the output smoothness.
It improves the smoothness of spindle output, reduces the rigidity requirements of the electric spindle, reduces heat dissipation burden and design complexity, and lowers costs.
Smart Images
Figure CN223876089U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to lathe technical field relates to a buffer type main shaft output mechanism. BACKGROUND
[0002] The mechanical main shaft (non-electric main shaft) of small machine tool is also called supporting main shaft, and is a power unit for loading workpieces or tools to realize accurate rotation. The requirement for rigidity is relatively high based on the requirement for machining accuracy. The requirement for rigidity means that it is difficult to effectively buffer load fluctuations such as start and stop. Therefore, in the prior art, the electric control system of the electric main shaft is often used to regulate and control load fluctuations. This not only increases the heat dissipation burden of the electric main shaft, but also increases the design difficulty of the main shaft integration. For small machine tools, the finished product cost and maintenance cost are both high. SUMMARY
[0003] The utility model aims at the above problems existing in prior art, provides a buffer type main shaft output mechanism, and the technical problem to be solved by the utility model is how to improve the stability of main shaft output.
[0004] The utility model discloses a buffer type main shaft output mechanism, which is characterized by comprising a gear box, a shaft sleeve and a rotating shaft, the rotating shaft and the shaft sleeve are both rotatably connected in the gear box through bearings, a worm wheel is also rotatably connected in the gear box, the shaft sleeve is provided with a worm that is engaged with the worm wheel, the rotating shaft is inserted into the shaft sleeve, and the two ends of the shaft sleeve are connected with the rotating shaft through a torsional spring.
[0005] Further, the shaft sleeve is slidably connected with a sleeve pipe through an external spline, and the sleeve pipe is rotatably connected with the gear box through a bearing.
[0006] The worm wheel is connected with a power source, the rotating shaft is used for the output of rotational torque, is used for connecting workpieces or tools, the worm wheel does not directly drive the rotating shaft to rotate, but first transmits the rotational torque to the shaft sleeve, the shaft sleeve transmits the rotational torque to the rotating shaft after overcoming a certain torsional restoring force of the torsional spring, there is a certain synchronous lag between the shaft sleeve and the rotating shaft under the condition of load fluctuation, buffering between power input and power output is realized, and the rigidity of the rotating shaft itself is not affected. When there is no sleeve pipe, there is a torsional phase difference in the rotating direction between the rotating shaft and the shaft sleeve, and after the sleeve pipe is arranged, the rotating shaft and the shaft sleeve also allow the existence of axial displacement difference, so that the buffering performance is further improved, and the output is more stable. BRIEF DESCRIPTION OF DRAWINGS
[0007] Figure 1 It is the structural schematic diagram of the main shaft output mechanism.
[0008] In the drawing, 1 is a gear box, 2 is a shaft sleeve, 3 is a rotating shaft, 4 is a worm wheel, 5 is a worm, 6 is a torsional spring, and 7 is a sleeve pipe. DETAILED DESCRIPTION
[0009] The utility model will be described below in conjunction with the drawings, and the technical scheme of the utility model will be further described, but the utility model is not limited to these embodiments.
[0010] As Figure 1 The main shaft output mechanism shown in the figure, it includes gear box 1, shaft sleeve 2 and rotating shaft 3, rotating shaft 3 and shaft sleeve 2 are all rotatably connected in gear box 1, gear box 1 is rotatably connected with a worm wheel 4, shaft sleeve 2 has the worm 5 of meshing with worm wheel 4, rotating shaft 3 is inserted in shaft sleeve 2, and the both ends of shaft sleeve 2 are connected with rotating shaft 3 through a torsion spring 6 respectively;Shaft sleeve 2 is slidably connected with a sleeve pipe 7, and the sleeve pipe 7 is rotatably connected with gear box 1 through a bearing.
[0011] Worm wheel 4 is connected with power source, rotating shaft 3 is used for the output of rotational torque, is used for connecting workpiece or tool, worm wheel 4 does not directly drive rotating shaft 3 to rotate, but first transmits the rotational torque to shaft sleeve 2, shaft sleeve 2 transmits the rotational torque to rotating shaft 3 after overcoming certain torsional restoring force of torsion spring 6, there is certain synchronous lag between shaft sleeve 2 and rotating shaft 3 under the condition of load fluctuation, realizes the buffer between power input and power output, and the rigidity of rotating shaft 3 itself is not influenced.
[0012] The specific embodiments described herein are merely illustrative of the spirit of the utility model. Those skilled in the art to which the utility model belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the utility model or exceed the scope defined by the attached claims.
Claims
1. A cushioned spindle output mechanism characterized by, The utility model relates to a gear box (1), axle sleeve (2) and rotating shaft (3), rotating shaft (3) and axle sleeve (2) are both through bearing rotation connection in gear box (1), still rotation connection has a worm wheel (4) in gear box (1), axle sleeve (2) have the worm (5) of engagement with worm wheel (4) on, rotating shaft (3) is inserted in axle sleeve (2), and axle sleeve (2) both ends are connected with rotating shaft (3) through a torsion spring (6) respectively.
2. The cushioned spindle output mechanism of claim 1, wherein, The axle sleeve (2) outer spline sliding connection has a sleeve pipe (7), and the sleeve pipe (7) is rotationally connected between the gear box (1) through the bearing.