CN214626757U

CN214626757U - Novel linear stepping motor

Info

Publication number: CN214626757U
Application number: CN202120293518.4U
Authority: CN
Inventors: 张雪峰
Original assignee: Ningbo Dingxiang Electrical Appliance Manufacturing Co ltd
Current assignee: Ningbo Dingxiang Electrical Appliance Manufacturing Co ltd
Priority date: 2021-02-02
Filing date: 2021-02-02
Publication date: 2021-11-05
Anticipated expiration: 2031-02-02

Abstract

The utility model provides a novel linear stepping motor belongs to the technical field of motor. A novel linear stepping motor comprises a screw rod, a rotor, a stator and a shell; the utility model discloses a directly set up on the hollow inner wall of the rotor shaft of rotor with lead screw complex internal thread, the integration of screw thread and rotor shaft has been realized, do benefit to the miniaturization of rotor shaft volume, thereby make the size of the epaxial magnet steel of rotor bigger, and the magnet steel adopts the preparation of neodymium iron boron materials, make the magnetic property of rotor better, it is more steady to operate, output torque is bigger, in addition, the stator comprises tooth pole and coil winding, the magnetic field that coil winding produced passes through the tooth pole and acts on the rotor, the structural strength of stator has not only been improved, the magnetic property of stator has still been effectively promoted, the stability of motor has further been guaranteed, the output torque of motor has been promoted, better satisfied the higher use occasion of output torque requirement, do benefit to linear electric motor's popularization and use.

Description

Novel linear stepping motor

Technical Field

The utility model relates to a technical field of motor specifically is to relate to a novel linear stepping motor.

Background

A linear motor, which is one of motors, converts a circular motion of a rotor into an axial motion of a lead screw, and thus is widely used in a lifting device.

At present, the existing linear motor on the market adopts a nut arranged in a rotor shaft to be matched with a lead screw, meanwhile, magnetic steel made of ferrite materials is sleeved outside the rotor shaft, and a stator made of coils is arranged on a shell, so that after the coils are electrified, the rotor shaft rotates, and the lead screw moves along the axial direction of the lead screw. However, due to structural limitation of the existing linear motor, the magnetic performance of the rotor provided with the magnetic steel made of ferrite materials is poor, so that the operation stability of the motor is not enough, the output torque of the motor is small, and the adaptability is poor. In addition, the existing motor only directly uses the coil as a stator, and the inner diameter of the coil is smaller, so that the magnetic field generated by the motor is weaker, the problems of poorer magnetic performance and smaller motor output torque exist, the use requirement for higher output torque requirement is difficult to meet, and the popularization and use of the linear motor are not facilitated.

Disclosure of Invention

In view of the above problems in the prior art, it is an object of the present invention to provide a novel linear stepping motor, which comprises a housing, a tooth pole disposed inside the housing, and a coil winding sleeved on the tooth pole to form a stator, wherein the stator is provided with a rotor comprising a rotor shaft and a magnetic steel, the rotor shaft is a hollow shaft, and an internal thread is disposed on the hollow inner wall of the rotor shaft, and a lead screw is disposed in the hollow of the rotor shaft and engaged with the internal thread, thereby achieving an integrated arrangement of the rotor shaft and the nut, reducing the arrangement space, and acting on the rotor after the tooth pole generated by the coil winding is transmitted to the tooth pole, further improving the magnetic performance, and improving the output torque of the motor, and in addition, the magnetic steel is made of neodymium iron boron material, so that the magnetic performance of the rotor is better, the output torque of the motor is further improved, and better meeting the use occasion with higher requirement on the output torque, the popularization and the use of the linear motor are facilitated.

The specific technical scheme is as follows:

a novel linear stepper motor having the features comprising:

a screw rod;

the rotor comprises a rotor shaft and magnetic steel, the rotor shaft is provided with a through hollow along the axial direction of the rotor shaft, the inner wall of the hollow of the rotor shaft is provided with internal threads, the screw rod is arranged in the hollow of the rotor shaft in a penetrating manner and matched with the internal threads, the magnetic steel is fixedly sleeved outside the rotor shaft, and the magnetic steel is made of neodymium iron boron materials;

the stator comprises tooth poles and coil windings, the tooth poles are arranged in a cylindrical shape and sleeved outside the magnetic steel, and the coil windings are sleeved outside the tooth poles;

the shell, the shell is the tube-shape setting, and outside the coil winding was located to the shell cover to, the both ends of shell were provided with an end cover respectively, and simultaneously, all seted up the perforation of mutual correspondence on the end cover, and the both ends of rotor shaft rotate respectively to be connected on the end cover, and stretches out in the perforation that the both ends of lead screw were covered from the both ends respectively.

The novel linear stepping motor is characterized in that the tooth poles are provided with a plurality of groups, each group of tooth poles comprises a front tooth pole and a rear tooth pole, and the front tooth poles and the rear tooth poles in the same group of tooth poles are oppositely arranged and form an I-shaped structure.

The utility model provides a forepoling and back tooth utmost point all include positioning disk and claw, and the positioning disk is the annular setting, and outside the magnet steel was located to the positioning disk cover, it has a plurality of claws to be annular array distribution on the inboard border of positioning disk, and outside the axial extension of claw edge positioning disk extended to the positioning disk, simultaneously, the positioning disk parallel and interval arrangement of the forepoling in the same group tooth utmost point and back tooth utmost point, and the claw of the same group tooth utmost point and back tooth utmost point in the tooth utmost point arranges in turn.

The novel linear stepping motor is characterized in that the diameter of a space defined by the plurality of tooth claws on the front tooth pole and the rear tooth pole is larger than 15 mm.

The novel linear stepping motor is characterized in that the positioning disc and the plurality of the tooth claws of the front tooth pole and the rear tooth pole are of an integrated structure formed by stamping and stretching.

The novel linear stepping motor is characterized in that a bearing is respectively sleeved at two ends of the rotor shaft, bearing mounting holes are formed in the end face of one side, close to each other, of each end cover, the bearing mounting holes and the through holes are coaxially arranged, and meanwhile, the bearings at the two ends of the rotor shaft are respectively installed in the two bearing mounting holes of the two end covers.

The utility model provides a foretell novel linear stepping motor, wherein, coil winding is provided with a plurality of groups, and a set of coil winding corresponds a set of tooth utmost point, and coil winding includes skeleton and coil, and the skeleton is the annular setting, and outside the preceding tooth utmost point that corresponds a set of tooth utmost point and the tooth claw of back tooth utmost point alternate arrangement were located to the skeleton cover, simultaneously, the both ends of skeleton lean on respectively on the positioning disk in preceding tooth utmost point and back tooth utmost point, and the coil is around locating on the skeleton.

The novel linear stepping motor is characterized in that the edge of at least one end cover is provided with an installation part protruding out of the shell, and the installation part is provided with an installation hole.

The novel linear stepping motor further comprises a position detection device, and the position detection device is arranged between the screw rod and one of the end covers.

The novel linear stepping motor is characterized in that the position detection device comprises a magnetic sheet and a Hall sensor for sensing the magnetic sheet, the magnetic sheet is embedded in one end of the screw rod extending out of the end cover, and the Hall sensor is arranged on the end cover.

The positive effects of the technical scheme are as follows:

in the novel linear stepping motor, the rotor shaft of the rotor is hollow, and the inner thread which is directly matched with the lead screw is arranged on the hollow inner wall, so that the size of the rotor shaft is effectively reduced, the size of the magnetic steel outside the rotor shaft is favorably increased, in addition, the magnetic steel is made of neodymium iron boron materials, the magnetic performance of the rotor is better, and the output torque of the motor is effectively increased; in addition, still constitute the stator by coil winding and tooth utmost point, not only provide the support for coil winding through the tooth utmost point, still make the magnetic field energy that coil winding produced transmit to the tooth utmost point simultaneously, through tooth utmost point and rotor cooperation, further promoted magnetic properties, structural strength is higher, and the output torque of motor is bigger, and better satisfied the higher use occasion of output torque requirement, do benefit to linear electric motor's popularization and use.

Drawings

Fig. 1 is a structural diagram of an embodiment of a novel linear stepping motor according to the present invention;

fig. 2 is a cross-sectional view of an embodiment of a novel linear stepping motor of the present invention;

fig. 3 is a structural diagram of a rotor of a novel linear stepping motor according to the present invention;

fig. 4 is a structural diagram of a stator of a novel linear stepping motor according to the present invention;

fig. 5 is a structural diagram of a tooth pole of the novel linear stepping motor of the present invention.

In the drawings: 1. a screw rod; 2. a rotor; 21. a rotor shaft; 22. magnetic steel; 211. hollow; 212. an internal thread; 3. a stator; 31. a tooth pole; 32. a coil winding; 311. a front tooth pole; 312. a rear tooth pole; 321. a framework; 322. a coil; 3111. positioning a plate; 3112. a toothed claw; 3113. connecting the positioning holes; 3114. positioning blocks; 4. a housing; 41. an end cap; 42. a clamping hole; 411. perforating; 412. a bearing mounting hole; 413. an installation part; 4131. mounting holes; 5. a bearing; 6. a position detection device; 61. a magnetic sheet; 62. and a Hall sensor.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the following embodiments are specifically described with reference to fig. 1 to 5, but the following contents are not intended to limit the present invention.

Fig. 1 is a structural diagram of an embodiment of a novel linear stepping motor according to the present invention; fig. 2 is a cross-sectional view of an embodiment of the novel linear stepping motor of the present invention. As shown in fig. 1 and fig. 2, the present embodiment provides a novel linear stepping motor including: a screw 1, a rotor 2, a stator 3, a housing 4 with an end cap 41 and a selectively arrangeable position detection device 6.

Fig. 3 is a structural diagram of a rotor of the novel linear stepping motor of the present invention. As shown in fig. 1 to 3, the rotor 2 of the motor includes a rotor shaft 21 and magnetic steel 22, at this time, the rotor shaft 21 is provided with a through hollow 211 along the axial direction thereof, and the hollow 211 of the rotor shaft 21 is a center hole thereof, and simultaneously, an inner thread 212 is provided on the inner wall of the hollow 211 of the rotor shaft 21, so that the structural integrity of the rotor shaft 21 relative to the existing structure in which a nut needs to be provided is higher, which is beneficial to the reduction of the size of the rotor shaft 21, provides a condition for providing the magnetic steel 22 with a larger size, and improves the magnetic performance of the rotor 2. And, wear to locate lead screw 1 in the hollow 211 of rotor shaft 21, and the internal thread 212 that sets up on the external screw thread of lead screw 1 and the hollow 211 of rotor shaft 21 mutually supports, realize the threaded connection of lead screw 1 and rotor shaft 21, simultaneously, fix the cover with magnet steel 22 and locate outside rotor shaft 21, make magnet steel 22 and rotor shaft 21 form an integral structure, thereby make follow-up magnet steel 22 can make whole rotor 2 rotate under the effect of magnetic field force, rotor 2 and the relative rotation of lead screw 1, the flexible condition that provides for lead screw 1. In addition, the magnetic steel 22 is made of neodymium iron boron materials, and the magnetic performance of the magnetic steel 22 made of neodymium iron boron materials is better than that of the magnetic steel 22 made of ferrite materials used in a traditional motor, so that the output torque of the motor is larger, the motor is suitable for use occasions with higher requirements on the output torque, and the popularization and the use of the linear motor are facilitated. Preferably, only one section of the middle part of the inner wall of the hollow 211 of the screw rod 1 is provided with a step, and the internal thread 212 is arranged on the step, so that the total length of the internal thread 212 is smaller, and when the screw rod 1 is matched, the friction force is smaller, and the friction loss is smaller.

Fig. 4 is a structural diagram of a stator of the novel linear stepping motor of the present invention. As shown in fig. 1, fig. 2 and fig. 4, the stator 3 of the motor further includes a tooth pole 31 and a coil winding 32, at this time, the tooth pole 31 is disposed in a cylindrical shape and sleeved outside the magnetic steel 22, the coil winding 32 is sleeved outside the tooth pole 31, i.e., the stator 3 is formed by the tooth pole 31 and the coil winding 32 together, so that after the coil winding 32 is electrified, a magnetic field generated by the coil winding 32 is transmitted to the tooth pole 31 and acts on the magnetic steel 22 of the rotor 2 through the tooth pole 31, which not only enables the tooth pole 31 to serve as a support for the coil winding 32, improves the reliability of the structure, has higher structural strength, but also further improves the magnetic performance of the stator 3, further increases the output torque of the motor, further satisfies the use occasion with higher requirement on the output torque, and has a wider application range.

Specifically, a shell 4 is arranged outside the integral structure formed by the stator 3 and the rotor 2, at the moment, the shell 4 is arranged in a cylindrical shape, and the shell 4 is sleeved outside the coil winding 32 to protect the stator 3 and the rotor 2. And, the both ends of shell 4 are provided with an end cover 41 respectively, the end cover 41 through both ends has realized the closure at shell 4 both ends, simultaneously, all set up the perforation 411 that corresponds each other on the both ends end cover 41, the both ends of rotor shaft 21 rotate respectively and connect on both ends end cover 41, make the stator 3 that rotor shaft 21 and magnet steel 22 formed can use both ends cover 41 to rotate as the strong point, and, stretch out in the perforation 411 on the both ends cover 41 is followed respectively at the both ends of lead screw 1, the flexible condition that provides for lead screw 1.

Fig. 5 is a structural diagram of a tooth pole of the novel linear stepping motor of the present invention. As shown in fig. 2 and 5, the teeth 31 in the stator 3 are provided with several groups, several groups of teeth 31 are arranged in parallel along the axial direction of the screw rod 1, each group of teeth 31 includes a front tooth 311 and a rear tooth 312, and the front tooth 311 and the rear tooth 312 in the same group of teeth 31 are arranged oppositely and form an "i" shaped structure, i.e. each group of teeth 31 has a cavity limited on two sides, providing conditions for subsequently installing the coil winding 32 on the teeth 31.

More specifically, each preceding tooth utmost point 311 and back tooth utmost point 312 all include positioning disk 3111 and prong 3112, and this moment, positioning disk 3111 is the annular setting to, outside magnet steel 22 was located to the positioning disk 3111 cover, simultaneously, it has a plurality of prongs 3112 to be annular array distribution on positioning disk 3111's the inboard border, makes be provided with magnet steel 22 in the space that positioning disk 3111 and a plurality of prongs 3112 enclose, and. A plurality of tooth claws 3112 on the same front tooth pole 311 or the rear tooth pole 312 all extend to the outside of the positioning disc 3111 along the axial direction of the positioning disc 3111, so that the circumferential direction of the magnetic steel 22 is wrapped by the tooth claws 3112, and the tooth claws serve as a part of the stator 3 and act on the magnetic steel 22. Meanwhile, the positioning discs 3111 of the front tooth pole 311 and the rear tooth pole 312 in the same set of tooth poles 31 are arranged in parallel and at intervals, namely, the limiting positions of the two ends of the tooth poles 31 are formed, the abutting foundation is provided for the subsequent installation of the coil windings 32 on the tooth poles 31, and the structural design is more reasonable. The tooth claw 3112 of the front tooth pole 311 and the rear tooth pole 312 in the same group of tooth poles 31 are alternately arranged, so that after a magnetic field generated after the coil winding 32 is electrified is transmitted to the tooth poles 31, the action effect of the front tooth pole 311 and the rear tooth pole 312 on the rotor 2 is the same, the stress uniformity of the rotor 2 is ensured, the operation stability of the rotor 2 is ensured, and the structural design is more reasonable.

More specifically, the diameter in the space that a plurality of tooth claws 3112 on preceding tooth utmost point 311 and the back tooth utmost point 312 in each tooth utmost point 31 enclose all is greater than 15mm, thereby make the internal diameter of each tooth utmost point 31 all great, it is bigger for the space that is used for installing magnet steel 22 in the present motor, thereby accessible increase magnet steel 22's diameter obtains better magnetic property, guarantee the stationarity and the reliability of motor output, make the output torque of motor bigger, further satisfied the higher use occasion of output torque requirement, application scope is wider.

More specifically, positioning disk 3111 and a plurality of tooth claw 3112 of preceding tooth utmost point 311 and back tooth utmost point 312 are punching press stretch forming's integral type structure, and preceding tooth utmost point 311 and back tooth utmost point 312 in every group tooth utmost point 31 all adopt punching press stretch forming promptly, for the foundry goods, and it is more convenient to process, and machining efficiency is higher, does benefit to the manufacturing of motor.

More specifically, two ends of rotor shaft 21 are equipped with a bearing 5 respectively, and simultaneously, bearing mounting hole 412 has all been seted up on the terminal surface of the one side that both ends cover 41 are close to each other, the bearing 5 at rotor shaft 21 both ends is installed respectively in two bearing mounting holes 412 of both ends cover 41, install the bearing 5 at rotor shaft 21's both ends promptly through bearing mounting hole 412, realize the installation of rotor shaft 21 on end cover 41, the friction loss has been reduced, service life is prolonged, in addition, bearing mounting hole 412 on the same end cover 41 and the coaxial setting of perforation 411, the tip of the lead screw 1 of wearing out in the hollow 211 of rotor shaft 21 is coaxial with perforation 411 in the ability, the problem of being disturbed by end cover 41 when lead screw 1 stretches out and draws back has been prevented.

More specifically, stator 3's coil winding 32 is provided with a plurality of groups, this moment, a set of coil winding 32 corresponds a set of tooth utmost point 31, make coil winding 32's quantity unanimous with tooth utmost point 31's quantity, simultaneously, coil winding 32 includes skeleton 321 and coil 322, simultaneously, skeleton 321 is the annular setting, the skeleton 321 cover is located outside the tooth claw 3112 that corresponds a set of tooth utmost point 31's preceding tooth utmost point 311 and back tooth utmost point 312 alternative arrangement, and simultaneously, the both ends of skeleton 321 support respectively and lean on the positioning disk 3111 of preceding tooth utmost point 311 and back tooth utmost point 312, coil 322 is around locating on the skeleton 321, provide the wire winding carrier for coil 322 through skeleton 321, the reliability of coil 322 installation has been guaranteed, provide the condition for guaranteeing motor output's stability.

More specifically, in the end covers 41 at the two ends of the housing 4, at least one edge of the end cover 41 is provided with an installation part 413 protruding out of the housing 4, at this time, the installation part 413 is symmetrically arranged with respect to the end cover 41, so that the end cover 41 is uniformly stressed, in addition, the installation part 413 is provided with an installation hole 4131, when the motor is assembled on other workpieces, the motor can be installed through the end cover 41 provided with the installation part 413, fasteners such as bolts and the like can be locked after penetrating through the installation hole 4131, and the disassembly and the assembly are more convenient.

More specifically, still can select nature to be provided with position detection device 6 on the motor, at this moment, position detection device 6 sets up between lead screw 1 and one of them end cover 41, through the position of position detection device 6 detection lead screw 1, prevents that lead screw 1 from excessively stretching out and leading to the problem of structural damage, and the safety guarantee nature is higher.

More specifically, position detecting device 6 includes magnetic sheet 61 again and can respond to the hall sensor 62 of magnetic sheet 61, at this moment, a caulking hole has been seted up to the end department of the non-drive end of lead screw 1, the caulking groove has been seted up on the end cover 41 of corresponding side, magnetic sheet 61 inlays and locates in the caulking hole that lead screw 1 stretches out the non-drive end outside end cover 41, hall sensor 62 sets up in the caulking groove on the end cover 41 that corresponds, when lead screw 1 is flexible, magnetic sheet 61 follows lead screw 1 and removes and predetermine the distance back by hall sensor 62 response at it, thereby for the extension of control lead screw 1 and prevent excessively to stretch out the structural damage problem that leads to and provide the reference condition, structural design is more reasonable.

As a preferred embodiment, a connecting positioning hole 3113 is arranged between positioning discs 3111 of the rear tooth pole 312 and the front tooth pole 311 in two adjacent groups of tooth poles 31, so that the two adjacent groups of tooth poles 31 are positioned more accurately, the structural precision is higher, the integrity is better, and the use performance of the motor is further improved.

As a preferred embodiment, the edge of the positioning disc 3111 of each of the rear tooth pole 312 and the front tooth pole 311 is provided with a protruding positioning block 3114, and the housing 4 is provided with a locking hole 42 matched with the positioning block 3114, so that when the housing 4 is sleeved outside the stator 3, the positioning block 3114 can be locked into the locking hole 42, the mounting and positioning of the tooth pole 31 on the housing 4 are realized, and the structural stability is higher.

In a preferred embodiment, the housing 4 is a plated member, and further, the housing 4 is a nickel plated member, which effectively prolongs the service life of the housing 4.

The novel linear stepping motor provided by the embodiment comprises a screw rod 1, a rotor 2, a stator 3 and a shell 4; through directly set up on the inner wall of the hollow 211 at rotor shaft 21 of rotor 2 with 1 complex internal thread 212 of lead screw, the integration of screw thread and rotor shaft 21 has been realized, do benefit to the miniaturization of rotor shaft 21 volume, thereby make the size of magnet steel 22 on the rotor shaft 21 bigger, and magnet steel 22 adopts the neodymium iron boron material preparation, make rotor 2's magnetic property better, it is more steady to operate, output torque is bigger, in addition, stator 3 comprises tooth pole 31 and coil winding 32, the magnetic field that coil winding 32 produced passes through tooth pole 31 and acts on rotor 2, not only the structural strength of stator 3 has been improved, the magnetic performance of stator 3 has effectively been promoted in addition, the stability of motor has further been guaranteed, the output torque of motor has been promoted, better satisfied the higher use occasion of output torque requirement, do benefit to linear electric motor's popularization and use.

The above is only a preferred embodiment of the present invention, and not intended to limit the scope of the invention, and it should be appreciated by those skilled in the art that various equivalent substitutions and obvious changes made in the specification and drawings should be included within the scope of the present invention.

Claims

1. A novel linear stepping motor is characterized by comprising:

a screw rod;

the rotor comprises a rotor shaft and magnetic steel, the rotor shaft is provided with a through hollow along the axial direction of the rotor shaft, an internal thread is arranged on the inner wall of the hollow of the rotor shaft, the lead screw is arranged in the hollow of the rotor shaft in a penetrating manner and matched with the internal thread, the magnetic steel is fixedly sleeved outside the rotor shaft, and the magnetic steel is made of neodymium iron boron material;

the shell, the shell is the tube-shape setting, the shell cover is located outside the coil winding, and, the both ends of shell are provided with an end cover respectively, simultaneously, two all set up the perforation of mutual correspondence on the end cover, the both ends of rotor shaft rotate respectively connect in two on the end cover, just two is followed respectively at the both ends of lead screw stretch out in the perforation on the end cover.

2. The novel linear stepping motor according to claim 1, wherein said tooth poles are provided in groups, each group of said tooth poles comprises a front tooth pole and a rear tooth pole, and said front tooth pole and said rear tooth pole of the same group of said tooth poles are oppositely arranged and form an I-shaped structure.

3. The novel linear stepping motor according to claim 2, wherein the front tooth pole and the rear tooth pole each comprise a positioning disk and a tooth claw, the positioning disk is annularly arranged, the positioning disk is sleeved outside the magnetic steel, a plurality of tooth claws are distributed on the inner side edge of the positioning disk in an annular array manner, the tooth claws extend out of the positioning disk along the axial direction of the positioning disk, meanwhile, the positioning disks of the front tooth pole and the rear tooth pole in the same group are arranged in parallel and at intervals, and the tooth claws of the front tooth pole and the rear tooth pole in the same group are alternately arranged.

4. The novel linear stepping motor according to claim 3, wherein the diameter of the space surrounded by the plurality of tooth claws on the front tooth pole and the rear tooth pole is larger than 15 mm.

5. The novel linear stepping motor according to claim 3, wherein said positioning plate and said plurality of said tooth claws of said front tooth pole and said rear tooth pole are each a stamped and drawn integral structure.

6. The novel linear stepping motor according to claim 1, wherein a bearing is respectively sleeved at both ends of the rotor shaft, bearing mounting holes are formed in end surfaces of the two end covers on the sides close to each other, the bearing mounting holes are coaxially arranged with the through holes, and the bearings at both ends of the rotor shaft are respectively mounted in the two bearing mounting holes of the two end covers.

7. The novel linear stepping motor according to claim 3, wherein the coil winding is provided with a plurality of groups, one group of the coil winding corresponds to one group of the tooth poles, the coil winding comprises a framework and a coil, the framework is arranged in an annular shape, the framework is sleeved outside the tooth claws which are arranged alternately on the front tooth pole and the rear tooth pole of the corresponding group of the tooth poles, meanwhile, two ends of the framework are respectively abutted against the positioning discs of the front tooth pole and the rear tooth pole, and the coil is wound on the framework.

8. The novel linear stepping motor according to claim 1, wherein at least one end cap is provided with a mounting portion protruding out of the housing at an edge thereof, and the mounting portion is provided with a mounting hole.

9. The novel linear stepper motor of claim 1, further comprising a position detection device disposed between the lead screw and one of the end caps.

10. The novel linear stepping motor according to claim 9, wherein the position detecting device comprises a magnetic sheet and a hall sensor for sensing the magnetic sheet, the magnetic sheet is embedded in one end of the screw rod extending out of the end cover, and the hall sensor is arranged on the end cover.