CN208913671U - A kind of high rigidity high-accuracy boring Milling Machining power head - Google Patents

Abstract

A kind of high rigidity high-accuracy boring Milling Machining power head, including shell, cabinet and spindle motor, shell and spindle motor are located at the left and right sides of cabinet, the output shaft of spindle motor is connect with the intracorporal motor synchronous belt wheel of case, main shaft and main shaft fixed plate are installed in shell, one end of main shaft is connect with the intracorporal main shaft synchronous pulley of case, feature: one end of main shaft, which is constituted, step, the first angular contact bearing is successively arranged between main shaft and shell, bearing spacer and the second angular contact bearing and mainshaft nut, mainshaft nut is screwed on main shaft and by the first angular contact bearing, bearing spacer and the second angular contact bearing mutually compress, first angular contact bearing is resisted against on step and is fitted close with step with the angle that main shaft is formed, second angular contact bearing is resisted against on the side side of shell simultaneously and the inner side edge of shell is close along the angle formed Cooperation.The radial and axial stress being subject to can be transmitted on shell and cabinet by main shaft, improve the rigidity and machining accuracy of main shaft.

Description

A kind of high rigidity high-accuracy boring Milling Machining power head

Technical field

The utility model belongs to boring-mill work engineering device technique field, and in particular to a kind of high rigidity high-accuracy boring Milling Machining use Power head.

Background technique

Numerically-controlled machine tool is one of most common process equipment of current enterprise and factory, mainly self-driving type power head is used to press from both sides Hold and the structure that matches of servo slide table of rotary cutter and driving power head sliding, with realize cutter rotation and it is mobile come At the process of boring and milling, wherein the generally existing rigidity of self-driving type power head it is insufficient and the problem of cause precision to reduce, especially That main shaft needs to clamp cutter rotation, cutter in boring-mill work workpiece can stress, make main shaft by radial and axial stress, As main shaft uses the extension of time, main shaft is gradually worn down and deforms, and shock resistance can also gradually decrease, so as to cause master The problems such as axis bounce, machining accuracy decline.

Common power head currently on the market, main shaft therein mainly take structure of the deep groove ball bearing with thrust ball bearing Or the structure of tapered roller bearing pretension, to improve the rigidity and shock resistance of main shaft, but main shaft often with bearing phase Mutual friction forms abrasion, deformation with collision.

In view of the foregoing, it is necessary to design that a kind of structure is simple, main shaft rigidity and machining accuracy can be effectively improved Boring-mill work power head.For this purpose, the applicant has made beneficial design, technical solution described below is this It is generated under background.

Summary of the invention

The task of the utility model is to provide a kind of high rigidity high-accuracy boring Milling Machining power head, is conducive to optimization and leads Installation and the fixed structure of axis and be eliminated the gap of main shaft and bearing to improve the rigidity and machining accuracy of main shaft.

What the task of the utility model was performed by, a kind of high rigidity high-accuracy boring Milling Machining power head, including One shell, a cabinet and a spindle motor, the shell and spindle motor are located at the left and right sides of cabinet, the main shaft horse The output shaft reached is fixedly connected with setting in the intracorporal motor synchronous belt wheel of case after the one side wall for passing through cabinet, the shell One main shaft and a main shaft fixed plate are inside installed, one end of the main shaft is intracorporal in case with setting after the one side wall for passing through cabinet Main shaft synchronous pulley is fixedly connected, and is drivingly connected between the motor synchronous belt wheel and main shaft synchronous pulley by synchronous belt, It is characterized by: one end of the main shaft, which is constituted, a step, at least one is disposed between the main shaft and shell A first angular contact bearing, a bearing spacer and at least one second angular contact bearing and a mainshaft nut, the mainshaft nut It is screwed on main shaft and mutually compresses first angular contact bearing, bearing spacer and the second angular contact bearing respectively, In the first angular contact bearing be resisted against on step and and the angle tight fit that is formed of step and main shaft, second angular contact Bearing, which is resisted against on the side side of shell, to be simultaneously fitted close with the inner side edge of shell along the angle formed.

In a specific embodiment of the utility model, the main shaft fixed plate is set in main shaft far from cabinet It is tightly connected on one end and with one end of the shell, is provided with a labyrinth type sealing ring between the main shaft fixed plate and main shaft, The side being located in shell in the main shaft fixed plate is fixed with a thrust nut, the thrust nut lateral surface and shell it is interior The side of flank threads connection and thrust nut is resisted against on the first angular contact bearing.

In another specific embodiment of the utility model, a self-lubricating is provided between the main shaft and cabinet Oil sealing.

In another specific embodiment of the utility model, it is provided between the main shaft and main shaft synchronous pulley One main shaft exempts from key bushing；An output shaft, which is provided with, between the output shaft and motor synchronous belt wheel exempts from key bushing.

In another specific embodiment of the utility model, the cabinet include one be fixedly mounted with shell the The second case lid that one case lid, one are fixedly mounted with spindle motor and the case lid spiral shell that is fixedly connected with the first case lid with the second case lid Nail, is formed with a drive cavity, the motor synchronous belt wheel, main shaft synchronous pulley between first case lid and the second case lid It is separately positioned in drive cavity with synchronous belt.

In having in a specific embodiment in turn for the utility model, the main shaft is in the end far from cabinet one end Centre, which is constituted, a knife handle fixed lock core.

First angular contact bearing is pressed against on main shaft and due to using by the second angular contact bearing pressure by the utility model The structure of collision and friction gap is eliminated on the inner wall of the housing, such main shaft can pass the radial and axial stress being subject to It leads on shell and cabinet, to improve the rigidity and machining accuracy of main shaft.

Detailed description of the invention

Fig. 1 is the planar structure cross-sectional view of an embodiment of the present invention.

In figure: 1. shells, 11. main shafts, 111. steps, 12. main shaft fixed plates, 121. labyrinth type sealing rings, 122. thrusts Nut, 13. first angular contact bearings, 14. bearing spacers, 15. second angular contact bearings, 16. mainshaft nuts, 17. self-lubricatings oil Envelope, 18. knife handle fixed lock cores；2. cabinet, 21. motor synchronous belt wheels, 211. output shafts exempt from key bushing, 22. main shaft synchronous pulleys, 221. main shafts exempt from key bushing, 23. synchronous belts, 24. first case lids, 25. second case lids, 26. case lid screws, 27. drive cavities；3. main Axis motor, 31. output shafts.

Specific embodiment

It elaborates by way of examples below, but is not to the utility model to the description of embodiment Limitation, it is any according to the utility model design it is made be only that formal but not substantive equivalent transformation should all regard For category of the technical solutions of the present invention.

Referring to Fig. 1, the utility model relates to a kind of high rigidity high-accuracy boring Milling Machining power head, including a shell 1, One cabinet 2 and a spindle motor 3, the shell 1 and spindle motor 3 are located at the left and right sides of cabinet 2, the spindle motor 3 output shaft 31 is fixedly connected after the one side wall for passing through cabinet 2 with the motor synchronous belt wheel 21 being arranged in cabinet 2, described Shell 1 in a main shaft 11 and a main shaft fixed plate 12 be installed, one end of the main shaft 11 after the one side wall for passing through cabinet 2 with The main shaft synchronous pulley 22 being arranged in cabinet 2 is fixedly connected, the motor synchronous belt wheel 21 and main shaft synchronous pulley 22 it Between be drivingly connected by synchronous belt 23, the size by replacing the motor synchronous belt wheel 21 and main shaft synchronous pulley 22 matches real The switching of existing different main shaft gyration speed.One end of the main shaft 11, which is constituted, a step 111, in the main shaft 11 and shell It is preferably two that quantity is disposed between body 1, which is preferably two the first angular contact bearings 13, a bearing spacer 14 and quantity, A the second angular contact bearing 15 and a mainshaft nut 16, the mainshaft nut 16 are screwed on main shaft 11 and by the first angular contacts Bearing 13, bearing spacer 14 and the second angular contact bearing 15 mutually compress respectively, and first angular contact bearing 13 is resisted against It is fitted close on step 111 and with step 111 with the angle that main shaft 11 is formed, second angular contact bearing 15 is resisted against shell It is simultaneously fitted close with the inner side edge of shell 1 along the angle formed on the one side of body 1.

Further, the main shaft fixed plate 12 be set on the one end of main shaft 11 far from cabinet 2 and with the shell 1 One end be tightly connected, a labyrinth type sealing ring 121 is provided between the main shaft fixed plate 12 and main shaft 11, it is solid in the main shaft The side being located in shell 1 on fixed board 12 is fixed with a thrust nut 122, the inside of thrust nut 122 lateral surface and shell 1 Face is threadedly coupled and the side of thrust nut 122 is resisted against on the first angular contact bearing 13.

Further, a self-lubricating oil seal 17 is provided between the main shaft 11 and cabinet 2.The main shaft 11 and master It is provided with a main shaft between axis synchronous pulley 22 and exempts from key bushing 221；It is set between the output shaft 31 and motor synchronous belt wheel 21 It is equipped with an output shaft and exempts from key bushing 211.The main shaft 11 is constituted among the end far from 2 one end of cabinet has a knife handle to fix Lock core 18.

Further, the cabinet 2 includes that first case lid 24, one being fixedly mounted with shell 1 and spindle motor 3 are solid Second case lid 25 of Dingan County's dress and the case lid screw 26 for being fixedly connected with the first case lid 24 with the second case lid 25, first case It is formed with a drive cavity 27 between lid 24 and the second case lid 25, the motor synchronous belt wheel 21, main shaft synchronous pulley 22 and same Step band is separately positioned in drive cavity 27.

Claims (6)

1. a kind of high rigidity high-accuracy boring Milling Machining power head, including a shell (1), a cabinet (2) and a spindle motor (3), the shell (1) and spindle motor (3) are located at the left and right sides of cabinet (2), the output shaft of the spindle motor (3) (31) it is fixedly connected after the one side wall for passing through cabinet (2) with the motor synchronous belt wheel (21) being arranged in cabinet (2), it is described One main shaft (11) and a main shaft fixed plate (12) be installed in shell (1), one end of the main shaft (11) across cabinet (2) one It is fixedly connected after side wall with the main shaft synchronous pulley (22) being arranged in cabinet (2), the motor synchronous belt wheel (21) and master It is drivingly connected between axis synchronous pulley (22) by synchronous belt (23), it is characterised in that: one end of the main shaft (11) is constituted There are a step (111), at least one first angular contact bearing is disposed between the main shaft (11) and shell (1) (13), a bearing spacer (14) and at least one second angular contact bearing (15) and a mainshaft nut (16), the mainshaft nut (16) it is screwed on main shaft (11) and by first angular contact bearing (13), bearing spacer (14) and the second angular contact bearing (15) it mutually compresses respectively, wherein the first angular contact bearing (13) is resisted against on step (111) and and step (111) and main shaft (11) formed angle be fitted close, second angular contact bearing (15) be resisted against on the side side of shell (1) and and The inner side edge of shell (1) is fitted close along the angle formed.

2. a kind of high rigidity high-accuracy boring Milling Machining power head according to claim 1, it is characterised in that the master Axis fixing plate (12) is set in main shaft (11) far from being tightly connected on the one end of cabinet (2) and with one end of the shell (1), is somebody's turn to do A labyrinth type sealing ring (121) are provided between main shaft fixed plate (12) and main shaft (11), on the main shaft fixed plate (12) Side in shell (1) is fixed with a thrust nut (122), the inside of thrust nut (122) lateral surface and shell (1) Face is threadedly coupled and the side of thrust nut (122) is resisted against on the first angular contact bearing (13).

3. a kind of high rigidity high-accuracy boring Milling Machining power head according to claim 1, it is characterised in that the master A self-lubricating oil seal (17) are provided between axis (11) and cabinet (2).

4. a kind of high rigidity high-accuracy boring Milling Machining power head according to claim 1, it is characterised in that the master It is provided with a main shaft between axis (11) and main shaft synchronous pulley (22) and exempts from key bushing (221)；The output shaft (31) and motor It is provided with an output shaft between synchronous pulley (21) and exempts from key bushing (211).

5. a kind of high rigidity high-accuracy boring Milling Machining power head according to claim 1, it is characterised in that the case Body (2) includes the first case lid (24), second case lid being fixedly mounted with spindle motor (3) being fixedly mounted with shell (1) (25) and by the first case lid (24) the case lid screw (26) being fixedly connected with the second case lid (25), first case lid (24) and Be formed between second case lid (25) drive cavity (27), the motor synchronous belt wheel (21), main shaft synchronous pulley (22) and Synchronous belt is separately positioned in drive cavity (27).

6. a kind of high rigidity high-accuracy boring Milling Machining power head according to claim 1, it is characterised in that the master Axis (11) is constituted among the end far from cabinet (2) one end a knife handle fixed lock core (18).