A Linear Feeding Mechanism for Milling and Boring Machines
A linear feed, milling and boring machine technology, applied in the field of milling and boring machines, can solve the problems affecting transmission rigidity and transmission accuracy, mutual parallelism, coplanar position accuracy is difficult to guarantee, affecting the 2" positioning accuracy of the boring shaft, etc., to improve the transmission Accuracy and smooth motion, compact structure, small footprint effect
Active Publication Date: 2017-07-11
SHENJI GRP KUNMING MACHINE TOOL
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Problems solved by technology
[0005] There is a force arm between the ball screw 5” and the boring shaft 2” of this linear feed mechanism, and when the ball screw 5” feeds and pushes and pulls the boring shaft 2”, an additional bending moment will be generated, which will affect the rotation of the boring shaft 2”. positioning accuracy
In addition, since the ball screw 5", the boring shaft 2" and the linear guide 3" are located in a small closed chamber, it is difficult to ensure the parallelism and co-planar position accuracy of the three, which affects the transmission rigidity and transmission accuracy
Method used
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[0031] refer to Figure 4 As shown, the ram 1 has a through cavity, and the third sleeve 5 is fixedly arranged in the cavity. A part of the third sleeve 5 is used to sleeve on the rear end of the main shaft 2 . Both ends of the third sleeve 5 are respectively fixed to the A end and the B end of the ram 1 , so that the axis of the third sleeve 5 coincides with the axis of the main shaft 2 . The main shaft 2 has a central hole. The first end of the ball screw 3 enters the central hole of the main shaft 2, and the second end extends to the outside of the ram 1 and is associated with the driving motor. Therefore, the ball screw 3 also has the function of extending outside the main shaft 2 but still It is in the middle of the third sleeve 5 .
[0032] The middle part of the ball screw 3 is provided with a matching ball screw nut 4 , and the outer side of the ball screw 3 is fixedly fitted with a bearing sleeve 7 . The right end of the bearing sleeve 7 is axially fixedly connect...
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The invention discloses a linear feeding mechanism for a milling-boring machine. The milling-boring machine comprises a ram, a spindle with a central hole and a driving device, wherein the ram is provided with a cavity, and the spindle is arranged in the cavity of the ram. The linear feeding mechanism is characterized in that the linear feeding mechanism comprises a ball screw and a ball screw nut; the first end of the ball screw is arranged in the central hole of the spindle, and the second end of the ball screw extends out of the ram and is related to the driving device; the ball screw nut is arranged on the ball screw and fixedly connected with the spindle through a bearing in the axial direction. According to the linear feeding mechanism, the ball screw and a boring shaft are coaxially arranged, additional torsion generated in transmission is eliminated, and the transmission precision and moving stability are improved. One end of the ball screw is fixed, and the other end of the ball screw is freely arranged in the boring shaft, so that the length of the ram is reduced, the structure is compact and occupied space is small.
Description
technical field [0001] The invention relates to the field of milling and boring machines, in particular to a linear feed mechanism for the milling and boring machines. Background technique [0002] At present, there are roughly two types of linear feed mechanisms for milling and boring machines. Such as figure 1 Shown, a kind of linear feed mechanism comprises ram 1 ' and is arranged on the boring shaft 2 ' of its inside, also is equipped with tailgate 3 ' at the rear portion of ram 1 '. The front end of the ball screw 4' passes through the ball screw nut 5' fixed on the inside of the ram 1' and is connected with the boring shaft 2', and its rear end is arranged on the inside of the rear end 3'. A linear guide 6' is arranged parallel to the ball screw 4' in the rear 3', and the end of the ball screw 4' located at the rear 3' is provided with a slide block 7' that can cooperate with the linear guide 6'. Therefore, the ball screw 4' is supported by the ball screw nut 5' at ...
Claims
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IPC IPC(8): B23Q5/40B23Q11/10
CPCB23Q5/40B23Q11/10B23Q2705/10
Inventor 王全宝杨甫余光怀周亚雄孙志强武记超张力李军马文俊代艳柴会敏徐贵善
Owner SHENJI GRP KUNMING MACHINE TOOL