Spindle motor
Technical field
The present invention relates to a kind of spindle motor.
Background technology
Spindle motor of the prior art generally comprises a motor and a leading screw, and motor is provided with motor output shaft, leading screw
Including leading screw screw rod and feed screw nut, motor output shaft is connected with leading screw screw rod by shaft coupling, and when motor works, motor is defeated
Shaft drives leading screw screw rod to rotate, and drives feed screw nut to move linearly when leading screw screw rod rotates, by sliding block and feed screw nut phase
Connection, such feed screw nut can band movable slider do stretching motion.Above-mentioned spindle motor, due to leading screw screw rod and motor is defeated
Shaft is connected by shaft coupling, and so, leading screw screw rod, shaft coupling, motor output shaft and electric machine casing are required to take axially
Space so that the axial length of spindle motor is longer, and axial space occupancy is larger, is not easy to install.
The content of the invention
The technical problem to be solved by the invention is to provide a kind of spindle motor, and its axial length is shorter, and axial space accounts for
With smaller.
In order to solve the above technical problems, spindle motor provided by the invention, it includes a body and a leading screw;
Body includes an electric machine casing, an end cap, a rotor and a stator, the one end open of electric machine casing, end cap assembling
In the openend of electric machine casing, stator and rotor are arranged in electric machine casing, and rotor includes a rotor body and an adapter sleeve, even
Female connector is fixedly connected on one end of rotor body, and adapter sleeve is coaxially set with rotor body;
Leading screw includes a leading screw screw rod and a feed screw nut, and leading screw screw rod is coaxially set with adapter sleeve, and leading screw screw rod is stretched
Enter into electric machine casing, and leading screw screw rod passes through rotor body and adapter sleeve, leading screw screw rod is interference fitted with adapter sleeve, leading screw spiral shell
One end of bar is rotatably arranged in first bearing seat, and the other end of leading screw screw rod may be rotatably mounted in second bearing seat,
Feed screw nut is threaded on leading screw screw rod, and the through hole for feed screw nut disengaging is provided with end cap.
Preferably, described connection is set on one end of the remote end cap of rotor body, the close end of rotor body
The one end open of lid, the internal diameter of rotor body are more than the diameter of feed screw nut, and feed screw nut can move axially in rotor body.
Preferably, described first bearing seat is arranged on the end face of remote end cap of electric machine casing, second bearing
Seat is arranged on outside electric machine casing, is provided with the first proximity switch on the inner face of one end of the remote end cap of rotor body, and second
The test side relative direction of the second proximity switch, the test side of the first proximity switch and the second proximity switch is provided with bearing block
Input of the output end of setting, the output end of the first proximity switch and the second proximity switch with a controller electrically connects, and controls
The output end of device processed electrically connects with the power supply unit of stator coil.
After above structure, the present invention compared with prior art, has the following advantages that:
The spindle motor of the present invention, leading screw screw rod is directly fixed with rotor, and rotor directly drives leading screw screw rod to rotate, this
Sample, compared to prior art, spindle motor of the invention eliminates motor output shaft and shaft coupling, so also just eliminates motor
Axial space shared by output shaft and shaft coupling;And leading screw screw rod is extend into electric machine casing by the spindle motor of the present invention
Interior, so, a part for leading screw screw rod is located in electric machine casing so that shared axle after leading screw screw rod and electric machine casing combination
Reduce to space;So as the above analysis, spindle motor axial space of the invention occupancy is smaller, and axial length is shorter,
So that the installing space needed for the spindle motor of the present invention is smaller, it is easily installed.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
Wherein, 1, electric machine casing;2nd, end cap;201st, through hole;3rd, rotor;301st, rotor;302nd, adapter sleeve;4th, stator;5、
Leading screw screw rod;6th, feed screw nut;7th, first bearing seat;8th, second bearing seat;9th, the first proximity switch;10th, the second proximity switch.
Embodiment
The present invention is described in more detail with reference to the accompanying drawings and detailed description.
As shown in Figure 1, spindle motor of the present invention includes a body and a leading screw.
Body includes an electric machine casing 1, an end cap 2, a rotor 3 and a stator 4, the one end open of electric machine casing 1, end cap
2 are assemblied in the openend of electric machine casing 1, and stator 4 and rotor 3 are arranged in electric machine casing 1, and rotor 3 includes a rotor body 301
With an adapter sleeve 302, adapter sleeve 302 is fixedly connected on one end of rotor body 301, and adapter sleeve 302 and rotor body 301 are coaxial
Line is set.
Leading screw includes a leading screw screw rod 5 and a feed screw nut 6, leading screw screw rod 5 are coaxially set with adapter sleeve 302, leading screw
Screw rod 5 is extend into electric machine casing 1, and leading screw screw rod 5 passes through rotor body 301 and adapter sleeve 302, and leading screw screw rod 5 is with being connected
The interference fit of set 302, one end of leading screw screw rod 5 are rotatably arranged in first bearing seat 7, and the other end of leading screw screw rod 5 can
It is rotatably installed in second bearing seat 8, feed screw nut 6 is threaded on leading screw screw rod 5, is provided with end cap 2 for leading screw spiral shell
The through hole 201 of the disengaging of mother 6.
During present invention work, rotor 3, which rotates, drives leading screw screw rod 5 to rotate, and leading screw screw rod 5 drives feed screw nut 6 axially to move
Dynamic, feed screw nut 6 can pass in and out electric machine casing 1 by through hole 201, it would be desirable to which sliding block and the feed screw nut 6 for carrying out stretching motion are solid
Fixed connection, so, the can of feed screw nut 6 band movable slider carry out stretching motion.
Described adapter sleeve 302 is arranged on one end of the remote end cap 2 of rotor body 301, the close end of rotor body 301
The one end open of lid 2, rotor body 301 are provided with endoporus, and the internal diameter of rotor body 301 is more than the diameter of feed screw nut 6, leading screw
Nut 6 can move axially in rotor body 301, so, when leading screw screw rod 5 rotates and drives feed screw nut 6 to move axially,
Feed screw nut 6 can be moved in rotor body 301, so allow for feed screw nut 6 axial movement distance it is longer, can band
It is dynamic to need the stretching motion of the sliding block progress of progress telescopic moving by a relatively large margin.
Described first bearing seat 7 is arranged on the end face of remote end cap 2 of electric machine casing 1, and second bearing seat 8 is set
Outside electric machine casing 1, the first proximity switch 9 is provided with the inner face of one end of the remote end cap 2 of rotor body 301, second
The test side phase of the second proximity switch 10, the test side of the first proximity switch 9 and the second proximity switch 10 is provided with bearing block 8
Direction is set, the input of the output end of the output end of the first proximity switch 9 and the second proximity switch 10 with a controller
Electrical connection, the output end of controller are electrically connected with the power supply unit of stator coil, and leading screw is driven so when leading screw screw rod 5 rotates
When nut 6 moves axially, if feed screw nut 6 is moved adjacent to the position of second bearing seat 8, the second proximity switch 10 will
Feed screw nut 6 is detected, and transmits a signal to controller, controller controls power supply unit to stop powering for stator coil so that
Rotor 3 stops operating, so that leading screw screw rod 5 stops operating, so that feed screw nut 6 stops movement, avoids leading screw spiral shell
Mother 6 collides with second bearing seat 8;If feed screw nut 6 is moved adjacent to one end of the remote end cap 2 of rotor body 301
Inner face position when, the first proximity switch 9 will detect that feed screw nut 6, and transmit a signal to controller, controller control
Power supply unit processed stops powering for stator coil so that and rotor 3 stops operating, so that leading screw screw rod 5 stops operating, so as to
So that feed screw nut 6 stops movement, feed screw nut 6 is avoided to be collided with rotor body 301.
Only just the present invention is made that explanation using preferable example above, but is not to be construed as the limit to claim
System, structure of the invention can have other changes, be not limited to said structure.In a word, all independent claims in the present invention
Protection domain in the various change made it is within the scope of the present invention.