CN205342628U - Electronic straight line feeds unit - Google Patents
Electronic straight line feeds unit Download PDFInfo
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- CN205342628U CN205342628U CN201620151612.5U CN201620151612U CN205342628U CN 205342628 U CN205342628 U CN 205342628U CN 201620151612 U CN201620151612 U CN 201620151612U CN 205342628 U CN205342628 U CN 205342628U
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Abstract
The utility model discloses an electronic straight line feeds unit belongs to electromechanical numerical control equipment and application, and its structure includes lead screw, motor and drive nut, the hollow rotor of rotor for being set tube -shape of motor, hollow rotor cover is put on the lead screw, drive nut with lead screw intermeshing, drive nut and hollow rotor fixed connection, thus hollow rotor drives drive nut, and the rotatory drive nut of messenger drive motor is followed lead screw rectilinear movement. During the assembly, the elder generation is connected drive nut on installing drive nut the lead screw again with the hollow rotor of motor. The utility model discloses the vice integrated design of collection frameless motor and the driving ball of nut, compact structure, overcome that the rotatory inertial force of the rotatory in -process lead screw of traditional lead screw causes generate heat, deformation and the serious scheduling problem of energy consumption, effective vibration and noise of reducing, the work precision of improvement equipment has improved transmission efficiency.
Description
Technical field
This utility model relates to dynamo-electric numerical control equipment and applied technical field, specifically a kind of electric linear feed unit.
Background technology
Ball screw assembly, is widely used on numerical control equipment at present as feeding drive mechanism, it is usually leading screw during use and rotates as main actuator drive ball nut, rotary motion is converted to the rectilinear motion along leading screw axis direction, thus driving workbench straight-line feed, the driving ball screw assembly, of namely what is often called leading screw.The screw rotation velocity of the conventional driving ball screw assembly, of leading screw is limited to feed system resonance critical speed, difficult raising, the long lead screw of especially large-scale, heavy high-grade, digitally controlled machine tools, own wt is much bigger compared with nut, leading screw rotating inertia force is very big, causing that heating, deformation and energy consumption are serious, the leading screw of deformation can produce again vibration and noise in rotary course, reduces equipment operating accuracy.
Utility model content
For the problems referred to above, the purpose of this utility model is in that to provide a kind of electric linear feed unit, and this device is the straight-line feed device that motor integrated-type nut drives ball-screw, and compact conformation, application simply, have good transmission performance.
The technical scheme in the invention for solving the technical problem includes: a kind of electric linear feed unit, including leading screw, motor and driving nut, described motor includes being the sleeve rotor of sleeve-shaped, stator and device for controling phase, described sleeve rotor is nested with on described leading screw, and described driving nut and described leading screw engage each other；Described driving nut is fixing with described sleeve rotor to be connected, described sleeve rotor drives described driving nut to rotate, described driving nut moves linearly along described leading screw while rotating on described leading screw, and described driving nut drives the stator of described motor to move linearly.
Further technical scheme is: the stator of described motor is provided with built-in temperature sensor to realize on-line temperature monitoring.Realize on-line temperature monitoring and can make thermal deformation error compensation, thus realizing more accurate straight-line feed motor control.
Further technical scheme is: be installed with nut sleeve on the stator of described motor, and described nut sleeve is fixedly installed supporting plate, and the rotary motion of described driving nut drives described nut sleeve and supporting plate rectilinear movement after described leading screw is converted into rectilinear motion.When linear feed unit of the present utility model is placed on bed piece as feed arrangement, supporting plate is bolted and can itself and workbench be connected easily.
In order to the structure making device is compacter, further technical scheme is: described driving nut is fixedly mounted on one end of described sleeve rotor, described nut sleeve is fixedly mounted on one end of described stator, described device for controling phase is connected and is arranged on the stator other end, and described nut sleeve is nested with the outside at described driving nut；Stator is connected so that on-line temperature monitoring signal can simultaneously as motor control and ball nut auxiliary driving thermal deformation error compensation control signal with nut sleeve.
For ease of the assembly and disassembly of device, further technical scheme is: described driving nut and described sleeve rotor, described nut sleeve and described stator, is attached each through threaded connector between described supporting plate and described nut sleeve.
Further technical scheme is: be provided with bearing between described driving nut and described nut sleeve, and described bearing includes the left bearing and the right bearing that are set up in parallel along described driving nut axis direction.Described left bearing and right bearing are angular contact ball bearing, adopt formal dress mode to assemble, it is possible to bear bigger axial force, simultaneously facilitate applying pretightning force.
In order to eliminate the gap of left and right angular contact ball bearing and regulate suitable pretightning force, further technical scheme is: described left bearing is furnished with left bearing end cap, and described right bearing is furnished with right bearing end cap；The interior surface of revolution of described left bearing end cap is provided with female thread and the outer surface of revolution with described driving nut is formed and threadeds, and the end face of described left bearing end cap coordinates with the inner ring end face of described left bearing；Described right bearing end cap is provided with external screw thread and the endoporus with described nut sleeve is formed and threadeds, and the end face of described right bearing end cap coordinates with the cycle surface of described right bearing.
Further technical scheme is: be provided with sleeve between described left bearing and described right bearing, the two ends of described sleeve respectively against described left bearing and described right bearing, described sleeve external diameter less than the external diameter of described left bearing and described right bearing inner ring；The cooperation position of described driving nut, described nut sleeve and described sleeve is provided with cannelure and radial direction oil hole.Cannelure can improve the processing technology driving nut, reduces processing cost；The lubrication that radial direction oil hole is easy between each parts is set, reduces noise and heating, the service life of extension fixture.
Described left bearing and described right bearing adopt formal dress mode to assemble.Described formal dress mode refers to that the Center of Pressure distance of two angular contact ball bearings is less than two bearing midpoint spans.
The beneficial effects of the utility model are:
1. this utility model adopts and collects the motor without frame with sleeve rotor and the driving ball screw assembly, integrated design of nut, compact conformation, can conveniently be used for straight-line feed motion requirement.Both can being effectively improved driving nut rotating speed, thus improving straight-line feed speed, having also ensured that enough driving forces by worm drive simultaneously.
2. this utility model use procedure adopts and drive the mode that nut rotates can overcome the problems such as leading screw the rotating inertia force heating, deformation and the energy consumption that cause are serious in tradition leading screw rotary course, effectively reduce vibration and noise, improve the operating accuracy of equipment.
3. this utility model adopts motor and the driving ball screw assembly, integrated-type integrated design of nut master, is absent from drive mechanism, improves transmission efficiency between motor and driving nut.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of this utility model embodiment；
Fig. 2 is the partial sectional view of Fig. 1；
Fig. 3 is the front view of Fig. 2；
Fig. 4 is the structural representation of this utility model embodiment nut sleeve；
Fig. 5 is the structural representation that this utility model embodiment drives nut.
In figure: 1 leading screw, 2 without frame motor, 3 supporting plates, 4 nut sleeve, 5 first trip bolts, 6 left bearing end caps, 7 left felt collars, 8 left bearings, 9 sleeves, 10 right bearings, 11 right bearing end caps, 12 second trip bolts, 13 drive nut, 14 right felt collars, 15 the 3rd trip bolts, 16 motor power line interfaces, 17 device for controling phases and temperature sensor wires interface.
Detailed description of the invention
Below in conjunction with Figure of description and specific embodiment, the utility model will be further described:
As shown in Figure 1, Figure 2 and Figure 3, a kind of electric linear feed unit, its structure includes: leading screw 1, without frame motor 2, supporting plate 3, nut sleeve the 4, first trip bolt 5, left bearing end cap 6, left felt collar 7, left bearing 8, sleeve 9, right bearing 10, right bearing end cap the 11, second trip bolt 12, driving nut 13, right felt collar 14, the 3rd trip bolt 15 etc..
Described motor without frame 2 is hollow shaft brushless motor, is made up of sleeve rotor, stator and device for controling phase.Sleeve rotor is sleeve-shaped, and sleeve rotor outer surface is evenly equipped with magnet steel bar, has appropriate gap between sleeve rotor inner surface and ball-screw.
As shown in Figure 5, driving nut 13 is cylindrical shroud barrel structure, its one end is provided with flange, on end face between the inside and outside disc of sleeve rotor, it is evenly equipped with the hole system parallel with sleeve rotor axle center line, the hole system of distribution and ball drive nut 13 end flanges screw to match, and leading screw 1 is through without frame motor 2 rotor inner hole, being designed with being uniformly distributed screwed hole without frame motor 2 rotor one end end face.
As shown in Figure 4, described nut sleeve 4 is cylindrical empty core structure, and nut sleeve 4 one end is provided with flange, and nut sleeve 4 realizes end flange by the 3rd trip bolt 15 and is uniformly distributed the connection of screwed hole without frame motor 2 stator one end exterior annular.Nut sleeve 4 endoporus is provided with ring-shaped step away from flange one end, the cannelure holding left felt collar 7 it is provided with in the middle part of ring-shaped step inner cylinder face, coordinate with left bearing 8 cycle surface inside ring-shaped step, right bearing 10 is positioned at the nut sleeve 4 nearly flange end of endoporus, the nearly flange end of nut sleeve 4 endoporus is provided with female thread, and right bearing end cap 11 is circulus, and its outer surface of revolution is provided with screw thread, right bearing end cap 11 is arranged on the nut sleeve 4 nearly flange end of endoporus by threaded engagement, and its end face coordinates with right bearing 10 cycle surface.The nearly flange end of nut sleeve 4 endoporus is provided with shoulder hole, the cannelure holding right felt collar 14 it is provided with in the middle part of described shoulder hole, left bearing 8 and right bearing 10 inner ring coordinate with driving the outer surface of revolution of nut 13, drive nut 13 realize end flange by the second trip bolt 12 and be uniformly distributed the connection of screwed hole without frame motor 2 rotor one end exterior annular.
The nearly flange end of nut 13 is driven to be provided with the shaft shoulder, the described shaft shoulder coordinates with right bearing 10 inner ring end face, it is provided with sleeve 9 between left bearing 8 and right bearing 10 inner ring opposing end surface, described sleeve 9 endoporus coordinates with driving the outer surface of revolution of nut 13, driving nut 13 to be provided with screw thread away from the outer surface of revolution of flange end, left bearing end cap 6 is circulus, and in it, the surface of revolution is provided with screw thread, left bearing end cap 6 is arranged on driving nut 13 away from flange end by threaded engagement, and its end face coordinates with left bearing 8 inner ring end face.
Motor without frame 2 be connected with motor power line interface 16 and device for controling phase and temperature sensor wires interface 17, be provided with built-in temperature sensor to realize on-line temperature monitoring without frame motor 2.Integrated design due to motor Yu nut, nut sleeve is connected with stator, so on-line temperature monitoring result can not only be used for motor control signal, it is also possible to make ball helical gearing thermal deformation error compensation signal, thus realizing more accurate straight-line feed motor control.
The shoulder hole of the nearly flange end of nut sleeve 4 endoporus holds and drives nut 13 end flange, the internal orifice dimension of described shoulder hole more than driving nut 13 end flange external diameter 2mm, nut sleeve 4 endoporus away from the ring-shaped step internal orifice dimension of flange one end more than left bearing end cap 6 external diameter 2mm.
Nut sleeve 4 outer surface is provided with square platform structure, described square platform structure plane is parallel to axially bored line in nut sleeve 4, square platform structure corner location is provided with screwed hole, is provided with counterbore in the middle part of supporting plate 3, and supporting plate 3 is arranged in the square flat surface of nut sleeve 4 end by the first trip bolt 5.
Described left bearing 8 and right bearing 10 are angular contact ball bearing, can bear axial force and can bear again radial force, adopt formal dress mode to assemble.Described sleeve 9 external diameter is less than the external diameter of left bearing 8 and right bearing 10 inner ring, to realize the axial location between left bearing 8 and right bearing 10.Drive and be provided with cannelure and radial direction oil hole in the middle part of the outer surface of revolution of nut 13, nut sleeve and sleeve 9 cooperation position.Cannelure can improve the processing technology driving nut 13, reduces processing cost；The lubrication that radial direction oil hole is easy between each parts is set, reduces noise and heating, the service life of extension fixture；The end flange hole driving nut 13 is counter bore structure.
The assembly method of the present embodiment comprises the following steps:
Step (1): leading screw 1 is coordinated with driving nut 13；
Step (2): the end flange driving nut 13 is arranged on the sleeve rotor without frame motor 2 by the second trip bolt 12；
Step (3): left bearing 8, sleeve 9 and right bearing 10 are sequentially placed in the endoporus of nut sleeve 4, and screw right bearing end cap 11, puts into the cannelure of the nearly flange end of nut sleeve 4 by right felt collar 14；
Step (4): nut sleeve 4 assembly is enclosed within driving nut 13；
Step (5): realize nut sleeve 4 assembly and the connection without frame motor 2 stator by the 3rd trip bolt 15, then left felt collar 7 is put into the cannelure of the remote flange end of nut sleeve 4, screws left bearing end cap 6；
Step (6): utilize the first trip bolt 5 to be arranged in nut sleeve 4 by supporting plate.
After installing, the overall structure of electric linear feed unit is placed on bed piece as feed arrangement.
For ease of to understanding of the present utility model, below in conjunction with its method of work, the utility model will be further described:
Starting without frame motor 2, sleeve rotor drives and drives nut 13 to rotate, and drives nut 13 to move linearly along leading screw 1 while rotating on leading screw 1, drives nut 13 to drive nut sleeve 4 and supporting plate 3 to move linearly, it is achieved straight-line feed.
Ball screw assembly, of the present utility model is designed to the driving structure of nut master, has sizes and helical pitch specification requirement.Described motor without frame 2 also has sizes and torque specification, including without polytypes such as the hollow servomotors of frame.According to size, torque and movement velocity conversion demand, the ball screw assembly, of multiple different lead specification and carry out effective integration integrated design without frame motor 2, form the seriation electric linear feed unit of various different size requirement.
The foregoing is only preferred embodiment of the present utility model; it it is not whole embodiment of the present utility model; not in order to limit this utility model; all within spirit of the present utility model and principle; any amendment of being made, equivalent replacement, improvement etc., should be included within protection domain of the present utility model.
Except technical characteristic described in description, all the other technical characteristics are those skilled in the art's known technology, and for prominent innovative characteristics of the present utility model, all the other technical characteristics do not repeat them here.
Claims (8)
1. an electric linear feed unit, it is characterized in that, including leading screw, motor and driving nut, described motor includes being the sleeve rotor of sleeve-shaped, stator and device for controling phase, described sleeve rotor is nested with on described leading screw, and described driving nut and described leading screw engage each other；Described driving nut is fixing with described sleeve rotor to be connected, described sleeve rotor drives described driving nut to rotate, described driving nut moves linearly along described leading screw while rotating on described leading screw, and described driving nut drives the stator of described motor to move linearly.
2. a kind of electric linear feed unit according to claim 1, is characterized in that, the stator of described motor is provided with built-in temperature sensor to realize on-line temperature monitoring.
3. a kind of electric linear feed unit according to claim 2, it is characterized in that, the stator of described motor is installed with nut sleeve, being fixedly installed supporting plate in described nut sleeve, the rotary motion of described driving nut drives described nut sleeve and supporting plate rectilinear movement after described leading screw is converted into rectilinear motion.
4. a kind of electric linear feed unit according to claim 3, it is characterized in that, described driving nut is fixedly mounted on one end of described sleeve rotor, described nut sleeve is fixedly mounted on one end of described stator, described device for controling phase is connected and is arranged on the stator other end, and described nut sleeve is nested with the outside at described driving nut；Stator is connected so that on-line temperature monitoring signal can simultaneously as motor control and ball nut auxiliary driving thermal deformation error compensation control signal with nut sleeve.
5. a kind of electric linear feed unit according to claim 3, is characterized in that, described driving nut and described sleeve rotor, described nut sleeve and described stator, is attached each through threaded connector between described supporting plate and described nut sleeve.
6. a kind of electric linear feed unit according to claim 4, is characterized in that, be provided with bearing between described driving nut and described nut sleeve, and described bearing includes the left bearing and the right bearing that are set up in parallel along described driving nut axis direction.
7. a kind of electric linear feed unit according to claim 6, is characterized in that, described left bearing is furnished with left bearing end cap, and described right bearing is furnished with right bearing end cap；The interior surface of revolution of described left bearing end cap is provided with female thread and the outer surface of revolution with described driving nut is formed and threadeds, and the end face of described left bearing end cap coordinates with the inner ring end face of described left bearing；Described right bearing end cap is provided with external screw thread and the endoporus with described nut sleeve is formed and threadeds, and the end face of described right bearing end cap coordinates with the cycle surface of described right bearing.
8. a kind of electric linear feed unit according to claim 6, it is characterized in that, it is provided with sleeve between described left bearing and described right bearing, the two ends of described sleeve are respectively against described left bearing and described right bearing, and the external diameter of described sleeve is less than the external diameter of described left bearing and described right bearing inner ring；The cooperation position of described driving nut, described nut sleeve and described sleeve is provided with cannelure and radial direction oil hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620151612.5U CN205342628U (en) | 2016-02-29 | 2016-02-29 | Electronic straight line feeds unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620151612.5U CN205342628U (en) | 2016-02-29 | 2016-02-29 | Electronic straight line feeds unit |
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| Publication Number | Publication Date |
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| CN205342628U true CN205342628U (en) | 2016-06-29 |
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| CN201620151612.5U Active CN205342628U (en) | 2016-02-29 | 2016-02-29 | Electronic straight line feeds unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105598732A (en) * | 2016-02-29 | 2016-05-25 | 山东大学 | Electric linear feeding unit and assembling method thereof |
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2016
- 2016-02-29 CN CN201620151612.5U patent/CN205342628U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105598732A (en) * | 2016-02-29 | 2016-05-25 | 山东大学 | Electric linear feeding unit and assembling method thereof |
| CN105598732B (en) * | 2016-02-29 | 2018-01-02 | 山东大学 | A kind of electric linear feed unit and its assembly method |
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