Stepping motor all-in-one machine with magnetic encoder

Abstract

The utility model relates to the technical field of stepping motors, in particular to a stepping motor all-in-one machine with a magnetic encoder, which comprises a stepping motor body and an encoder assembly, the stepping motor body comprises a stator iron core with a winding end, a rear end cover with a lead groove and a rotating shaft, a coil is wound on the winding end, and the magnetic encoder is arranged on the rear end cover. One end of the rotating shaft is rotationally mounted on the rear end cover; the encoder assembly comprises a connecting piece with a first containing cavity, first magnetic steel and a driving plate, the connecting piece is connected with the rear end cover, the driving plate is arranged at a cavity opening of the first containing cavity, the first containing cavity is provided with a through hole, a blocking piece and a communicating hole, the blocking piece is located on the outer side of the through hole, and the first magnetic steel is arranged on the rotating shaft and extends into the through hole. According to the utility model, the communication hole is enclosed by the blocking member, so that the lead wire end is prevented from being worn by the rotor.

Description

Technical Field

[0001] The present application relates to the technical field of stepper motors, and more specifically to an integrated stepper motor with a magnetic encoder. Background Art

[0002] Stepper motors are widely used in the field of industrial control due to their simple structure and low cost. Conventional stepper motors have no motion feedback during the rotation of the rotor and are open-loop control systems. When the load is too large, the operation time is too long, or the power supply is unstable, it is easy to lose steps. In view of this, adding a grating encoder or a magnetic grating encoder to the original stepper motor structure to achieve a closed-loop control system has become the development trend of the current stepper motor market. The grating encoder determines the position by detecting the movement of the grating stripes, and the magnetic grating encoder measures the position by detecting the change of the magnetic field. When the motor is on the verge of losing steps, the driver board will receive an electrical signal and supply the motor with higher kinetic energy to avoid the motor losing steps. The stepper motor integrated machine refers to a motor product composed of a stepper motor body and an encoder component.

[0003] Our company currently has a stepper motor integrated machine with a magnetic encoder, such as Figure 1 As shown, it includes a stepping motor body 90, a connecting member 91, a magnetic steel 92 and a driving plate 93. The stepping motor body 90 has a rotor 901 and a stator core 902 wound with a coil. The end of the connecting member 91 away from the stepping motor body 90 has a mounting cavity 911. The driving plate 93 is installed at the cavity opening of the mounting cavity 911. One end of the rotor 901 extends into the mounting cavity 911. The end of the rotor 901 extending into the mounting cavity 911 is embedded with the magnetic steel 92. The magnetic steel 92 and the driving plate 93 are connected to each other. The plates 93 are spaced a predetermined distance apart. When the rotor 901 rotates, the magnetic steel 92 rotates accordingly. The Hall element on the driving plate 93 receives the magnetic field change of the rotating magnetic steel 92 and outputs an electrical signal. After the signal is fed back and processed, the driving plate 93 provides a suitable current to the coil to prevent the rotor 901 from losing steps. In addition, in order to realize the electrical connection between the driving plate 93 and the coil, the coil leads out a plurality of lead ends 9021 and extends into the installation cavity 911, and is welded to one end of the driving plate 93 close to the magnetic steel 92. However, when the rotor 901 rotates at a high speed, since there is no shielding between the rotor 901 and the lead end 9021 of the coil, and the lead end 9021 of the coil is placed in the installation cavity 911, except for the end connected to the driving plate 93, the rest of the parts are freely arranged, or there is a risk that the lead end 9021 of the coil contacts, rubs and is worn with the rotor 901 at a certain moment.

[0004] Therefore, there is a need to provide a stepper motor integrated machine with a magnetic encoder that can prevent the lead ends from being worn by the rotor. Summary of the invention

[0005] The main purpose of the present application is to provide a stepper motor integrated machine with a magnetic encoder, wherein the stepper motor integrated machine with a magnetic encoder comprises a stepper motor body and an encoder assembly, the encoder assembly is fixedly connected to the stepper motor body, the stepper motor body comprises a stator core, an end cover assembly and a rotor assembly, the stator core has a plurality of winding ends arranged in an annular shape, each of the winding ends is wound with a coil, the end cover assembly comprises a front end cover and a rear end cover, the stator core is located between the front end cover and the rear end cover, and the rear end cover has a lead groove, the rotor assembly comprises a rotating shaft, the two ends of the rotating shaft are respectively rotatably mounted on the front end cover and the rear end cover, and the two ends of the rotating shaft respectively pass through the front end cover and the rear end cover; the encoder assembly comprises a connecting piece, a first magnetic steel and a driving plate, the connecting piece is located at the rear end cover away from One end of the stator core, and the connecting piece is fixedly connected to the rear end cover, the end of the connecting piece facing away from the rear end cover has a first accommodating cavity, the driving plate is arranged at the cavity mouth of the first accommodating cavity, the cavity bottom of the first accommodating cavity has a through hole, a blocking piece and a connecting hole, the blocking piece is located on the outside of the through hole, the first magnetic steel is fixedly installed on the end of the rotating shaft close to the rear end cover, the rotating shaft is provided with an end of the first magnetic steel extending into the through hole, and the first magnetic steel is close to the driving plate, the connecting hole is connected to the lead groove, the lead end of the coil is connected to the end of the driving plate close to the first magnetic steel, and the blocking piece is located between the first magnetic steel and the lead end of the coil, the spacing between the rotating shaft and the lead end of the coil is achieved by making the blocking piece surround the connecting hole, compared with the prior art, it has the advantage of preventing the lead end from being worn by the rotor.

[0006] Another object of the present application is to provide a stepper motor integrated machine with a magnetic encoder, wherein the encoder assembly also includes a cover plate and a plurality of first fasteners, the cover plate is located at the end of the drive plate away from the connecting member, the cover plate has a plurality of through first connecting holes, the bottom of the first accommodating cavity has a plurality of through second connecting holes, each of the first connecting holes is directly opposite to a second connecting hole, the first fasteners correspond to the first connecting holes one by one, each of the first fasteners is successively penetrated by the corresponding first connecting hole and the second connecting hole and is fixedly connected to the stepper motor body, the drive plate is covered by the cover plate, and the connection between the cover plate, the connecting member and the stepper motor body is achieved by the first fasteners.

[0007] In order to achieve at least one of the above-mentioned invention purposes, the present application provides a stepper motor integrated machine with a magnetic encoder, wherein the stepper motor integrated machine with a magnetic encoder comprises:

[0008] A stepper motor body, the stepper motor body comprising a stator core, an end cover assembly and a rotor assembly, the stator core having a plurality of winding ends arranged in an annular shape, each of the winding ends being wound with a coil, the end cover assembly comprising a front cover and a rear cover, the stator core being located between the front cover and the rear cover, and the rear cover having a lead groove, the rotor assembly comprising a rotating shaft, both ends of the rotating shaft being rotatably mounted on the front cover and the rear cover respectively, and both ends of the rotating shaft passing through the front cover and the rear cover respectively; and

[0009] An encoder component, which is fixedly connected to the stepper motor body, and the encoder component includes a connecting piece, a first magnetic steel and a driving plate, the connecting piece is located at the end of the rear end cover away from the stator core, and the connecting piece is fixedly connected to the rear end cover, the end of the connecting piece away from the rear end cover has a first accommodating cavity, the driving plate is arranged at the cavity mouth of the first accommodating cavity, the cavity bottom of the first accommodating cavity has a through hole, a blocking piece and a connecting hole, the blocking piece is located on the outside of the through hole, the first magnetic steel is fixedly installed on the end of the rotating shaft close to the rear end cover, the rotating shaft is provided with an end of the first magnetic steel extending into the through hole, and the first magnetic steel is close to the driving plate, the connecting hole is connected to the lead groove, the lead end of the coil is connected to the end of the driving plate close to the first magnetic steel, and the blocking piece is located between the first magnetic steel and the lead end of the coil.

[0010] In one or more embodiments of the present application, the encoder assembly also includes a cover plate and a plurality of first fasteners, the cover plate is located at the end of the drive plate away from the connecting member, the cover plate has a plurality of through first connecting holes, the bottom of the first accommodating cavity has a plurality of through second connecting holes, each of the first connecting holes is opposite to a second connecting hole, the first fasteners correspond to the first connecting holes one by one, and each of the first fasteners successively penetrates the corresponding first connecting hole and the second connecting hole and is fixedly connected to the stepper motor body.

[0011] In one or more embodiments of the present application, the cavity opening of the first accommodating cavity has a first annular support, the end of the cover plate close to the connecting member has a second accommodating cavity, and the cavity opening of the second accommodating cavity has a second annular support, and when the cover plate is connected to the connecting member, the two ends of the driving plate respectively abut against the first annular support and the second annular support.

[0012] In one or more embodiments of the present application, the blocking member has an avoidance gap.

[0013] In one or more embodiments of the present application, the encoder assembly also includes a mounting member, one end of which is sleeved on the rotating shaft and fixedly connected to the rotating shaft, and the end of the mounting member facing away from the rotating shaft has a mounting groove, and the first magnet is embedded in the mounting groove.

[0014] In one or more embodiments of the present application, the rotor assembly also includes two rotor cores and a second magnet, the second magnet is located between the two rotor cores, and the rotor core and the second magnet are both sleeved on the rotating shaft, and the stator core is located on the outside of the rotor core.

[0015] In one or more embodiments of the present application, the stepper motor body also includes a frame combination, the frame combination includes a front frame and a rear frame, the stator core is located between the front frame and the rear frame, the front frame and the rear frame have a plurality of supporting parts at opposite ends, and both ends of each winding end are against the supporting parts on the front frame and the rear frame.

[0016] In one or more embodiments of the present application, the front end cover and the rear end cover each have an embedded groove at the opposite end, and the end of the front frame away from the support portion is embedded in the embedded groove of the front end cover, and the end of the rear frame away from the support portion is embedded in the embedded groove of the rear end cover.

[0017] In one or more embodiments of the present application, the stepper motor body further includes a plurality of second fasteners, one end of which extends from the rear end cover and successively passes through the stator core and the front end cover.

[0018] In an embodiment of the present application, a stepper motor integrated machine with a magnetic encoder includes a stepper motor body and an encoder assembly, the encoder assembly is fixedly connected to the stepper motor body, the stepper motor body includes a stator core with a winding end, an end cover assembly and a rotating shaft, a coil is wound on the winding end, the end cover assembly includes a front cover and a rear cover, the stator core is located between the front cover and the rear cover, and the rear cover has a lead groove, and the rotating shaft is rotatably installed on the end cover assembly; the encoder assembly includes a connecting piece, a first magnetic steel and a driving plate, the connecting piece is fixedly connected to the rear cover, and the connecting piece is connected to the rear cover. The component has a first accommodating cavity, the driving plate is arranged at the cavity mouth of the first accommodating cavity, the first accommodating cavity has a through hole, a blocking member and a connecting hole, the blocking member is located on the outside of the through hole, the first magnetic steel is arranged on the rotating shaft and extends into the through hole, and the first magnetic steel is close to the driving plate, the connecting hole is connected to the lead groove, the lead end of the coil is connected to an end of the driving plate close to the first magnetic steel, and the blocking member is located between the first magnetic steel and the lead end of the coil, and the spacing between the rotating shaft and the lead end of the coil is achieved by making the blocking member surround the connecting hole. Compared with the prior art, it has the advantage of preventing the lead end from being worn by the rotor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] These and / or other aspects and advantages of the present application will become clearer and easier to understand from the following detailed description of the embodiments of the present application in conjunction with the accompanying drawings, in which:

[0020] Figure 1 The figure shows a partial structural schematic diagram of an existing stepper motor integrated machine with a magnetic encoder;

[0021] Figure 2 The figure shows a structural schematic diagram of a stepper motor integrated machine with a magnetic encoder according to the utility model;

[0022] Figure 3 The figure shows a schematic diagram of the structure of the stator core;

[0023] Figure 4 The figure shows a schematic diagram of the structure of the rear end cover;

[0024] Figure 5 The figure shows a schematic diagram of the structure of the connecting member;

[0025] Figure 6 The figure shows a schematic diagram of the structure of the cover plate;

[0026] Figure 7 The figure shows an exploded view of a stepper motor integrated machine with a magnetic encoder;

[0027] Figure 8 The diagram shows a schematic diagram of the structure of the front skeleton. DETAILED DESCRIPTION

[0028] The terms and words used in the following specification and claims are not limited to the literal meanings, but are merely used by the inventor to enable a clear and consistent understanding of the present application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of the present application is provided for illustrative purposes only and not for the purpose of limiting the present application as defined by the appended claims and their equivalents.

[0029] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0030] Although ordinals such as "first," "second," and the like will be used to describe various components, those components are not limited herein. The term is used only to distinguish one component from another. For example, a first component may be referred to as a second component, and likewise, a second component may be referred to as a first component without departing from the teachings of the utility model concept. The term "and / or" as used herein includes any and all combinations of one or more associated listed items.

[0031] The terms used herein are only used for the purpose of describing various embodiments and are not intended to be limiting. As used herein, singular forms are intended to also include plural forms, unless the context clearly indicates an exception. In addition, it will be understood that the terms "including" and / or "having" when used in this specification specify the presence of the described features, numbers, steps, operations, components, elements or combinations thereof, without excluding the presence or addition of one or more other features, numbers, steps, operations, components, elements or groups thereof.

[0032] Application Overview

[0033] There is a stepper motor integrated machine with a magnetic encoder. When the rotor rotates at high speed, there is no obstruction between the rotor and the lead ends of the coil, and the lead ends of the coil are placed in the installation cavity. Except for the end connected to the drive board, the rest of the lead ends of the coil are freely arranged, or there is a risk that the lead ends of the coil will contact, rub and wear the rotor at some point.

[0034] Based on the above technical problems, the present application proposes a stepper motor integrated machine with a magnetic encoder, wherein the stepper motor integrated machine with a magnetic encoder has a simple structure, does not involve complicated manufacturing processes and expensive materials, and has high economic efficiency. At the same time, for manufacturers, the stepper motor integrated machine with a magnetic encoder provided by the present application is easy to produce and low in cost, which is more conducive to controlling production costs and further conducive to product promotion and use.

[0035] Schematic diagram of a stepper motor integrated machine with a magnetic encoder.

[0036] refer to Figures 2 to 8 According to a preferred embodiment of the utility model, a stepper motor integrated machine with a magnetic encoder includes a stepper motor body 10 and an encoder component 20, and the encoder component 20 is fixedly connected to the stepper motor body 10.

[0037] Specifically, Figure 2 As shown, the stepper motor body 10 includes a stator core 101, an end cover assembly 102 and a rotor assembly 103. Figure 3 As shown, the stator core 101 has a plurality of winding ends 1011 arranged in a ring shape. More specifically, the stator core 101 has an octagonal hole 1012 extending therethrough. Each wall surface of each side of the octagonal hole 1012 has a winding end 1011. A coil (not shown in the figure) is wound around each winding end 1011. The polarities of the coils on two adjacent winding ends 1011 are opposite, and a total of four lead ends (not shown in the figure) are led out.

[0038] In addition, if Figure 2 As shown, the end cover assembly 102 includes a front end cover 1021 and a rear end cover 1022, the stator core 101 is located between the front end cover 1021 and the rear end cover 1022, and the two ends of the stator core 101 are respectively against the front end cover 1021 and the rear end cover 1022. Figure 4 The rear end cover 1022 has a lead groove 10221, and the four lead ends extend from the lead groove 10221.

[0039] In addition, if Figure 2 As shown, the rotor assembly 103 includes a rotating shaft 1031, and both ends of the rotating shaft 1031 are rotatably mounted on the front cover 1021 and the rear cover 1022 through bearings, and both ends of the rotating shaft 1031 pass through the front cover 1021 and the rear cover 1022. It should be noted that the rotating shaft 1031 is located on the inner side of the stator core 101, and when the coil is energized, the rotating shaft 1031 rotates circumferentially around the central axis of the rotating shaft 1031.

[0040] In addition, if Figure 2 As shown, the encoder assembly 20 includes a connecting member 201, a first magnetic steel 202 and a driving plate 203. The connecting member 201 is located at one end of the rear end cover 1022 away from the stator core 101, and the connecting member 201 is fixedly connected to the rear end cover 1022. The end of the connecting member 201 away from the rear end cover 1022 has a first accommodating cavity 2011. The driving plate 203 is arranged at the cavity opening of the first accommodating cavity 2011. Figure 2 and Figure 5 The bottom of the first accommodating cavity 2011 has a through hole 20111, a blocking member 20112 and a connecting hole 20113, the blocking member 20112 is located on the outside of the through hole 20111, the first magnetic steel 202 is fixedly installed on one end of the rotating shaft 1031 close to the rear end cover 1022, the rotating shaft 1031 is provided with one end of the first magnetic steel 202 extending into the through hole 20111, and the first magnetic steel 202 is close to the driving plate 203, the connecting hole 20113 is connected to the lead groove 10221, the lead-out end is connected to the end of the driving plate 203 close to the first magnetic steel 202 by welding, and the blocking member 20112 is located between the first magnetic steel 202 and the lead-out end.

[0041] It should be noted that in the embodiments of the present application, Figure 5 As shown, the blocking member 20112 is in the shape of a circular ring, and the blocking member 20112 is extended from the bottom wall of the first accommodating cavity 2011 in the direction away from the stator core 101 by a predetermined distance. By arranging the blocking member 20112 on the outer side of the rotating shaft 1031 to surround the side of the rotating shaft 1031, the lead-out terminal and the rotating shaft 1031 are spaced apart. Even if the portion of the lead-out terminal extending into the first accommodating cavity 2011 is freely arranged, the lead-out terminal is difficult to contact the rotating shaft 1031, thereby avoiding the risk of the lead-out terminal being worn by the rotating shaft 1031 in the prior art. Compared with the prior art, the lead-out terminal has the advantage of avoiding the lead-out terminal being worn by the rotor.

[0042] Furthermore, in order to cover the end of the driving plate 203 away from the connecting member 201 and realize external protection of the driving plate 203, as shown in FIG. Figure 2 As shown, the encoder assembly 20 further includes a cover plate 204 , which is located at one end of the driving plate 203 away from the connecting member 201 , and the cover plate 204 is connected to the connecting member 201 and covers the connecting member 201 .

[0043] Specifically, in order to realize the connection between the cover plate 204 and the connecting member 201, and the connection between the encoder assembly 20 and the stepping motor body 10, as shown in FIG. Figure 7 As shown, the encoder assembly 20 also includes a plurality of first fasteners 205, such as Figure 6 As shown, the cover plate 204 has a plurality of through first connection holes 2041, such as Figure 5As shown, the bottom of the first accommodating cavity 2011 has a plurality of through second connecting holes 20116, each of the first connecting holes 2041 is directly opposite to one of the second connecting holes 20116, the first fasteners 205 correspond to the first connecting holes 2041 one by one, and each of the first fasteners 205 successively penetrates the corresponding first connecting hole 2041 and the second connecting hole 20116. In the embodiment of the present application, the first fasteners 205 are implemented as bolts, and a cross-section of the cover plate 204 and the connecting member 201 is square. The number of the first connecting holes 2041 is two and they are arranged diagonally. After the first fasteners 205 successively penetrate the corresponding first connecting holes 2041 and the second connecting holes 20116, they are fixedly connected to the stepper motor body 10 in a threaded connection manner, thereby realizing the fixed connection between the cover plate 204, the connecting member 201 and the stepper motor body 10. In order to reduce the time for screwing the first fastener 205, the hole walls of the first connecting hole 2041 and the second connecting hole 20116 are smooth, so that the assembler can quickly pass one end of the first fastener 205 through the first connecting hole 2041 and the second connecting hole 20116 and threadedly connect with the stepper motor body 10; in addition, after tightening the first fastener 205, the end of the first fastener 205 facing away from the stepper motor body 10 presses the cover plate 204, so that the two ends of the connector 201 are tightly against the rear end cover 1022 and the cover plate 204.

[0044] Furthermore, in order to realize that the driving plate 203 is fixed at the opening of the first accommodating cavity 2011 and is wrapped by the connecting member 201 and the cover plate 204, as shown in FIG. Figure 5 As shown, the opening of the first accommodating cavity 2011 has a first annular support 20114. Figure 6 As shown, the cover plate 204 has a second accommodating cavity 2042 at one end close to the connecting member 201, and the cavity opening of the second accommodating cavity 2042 has a second annular support 20421. When the cover plate 204 is connected to the connecting member 201, one end of the driving plate 203 extends into the first accommodating cavity 2011 and abuts against the first annular support 20114, and the other end of the driving plate 203 extends into the second accommodating cavity 2042 and abuts against the second annular support 20421.

[0045] In addition, since the end of the driving plate 203 away from the stator core 101 has a terminal (not shown) electrically connected to an external power source and a controller, in order to prevent the cover plate 204 from covering the two terminals, as shown in FIG. Figure 6As shown, the bottom wall of the second accommodating cavity 2042 of the cover plate 204 has two exposed holes 20422 connected to the outside. When the two ends of the driving plate 203 are respectively against the first annular support 20114 and the second annular support 20421, the two wiring terminals extend into the two exposed holes 20422 respectively.

[0046] In addition, since a capacitor (not shown) is arranged at one end of the drive plate 203 close to the stator core 101, and the capacitor is located above the rotating shaft 1031, in order to prevent the capacitor from interfering with the blocking member 20112 and affecting the installation of the drive plate 203, as shown in FIG. Figure 5 As shown, the blocking member 20112 has an avoidance gap 20115. In the embodiment of the present application, the avoidance gap 20115 is located at the top of the blocking member 20112. Since the avoidance gap 20115 will seal the avoidance gap 20115 after the driving plate 203 is installed on the first annular support 20114, the lead end is affected by the capacitor and will not extend into the avoidance gap 20115 and contact the rotating shaft 1031.

[0047] Furthermore, in order to realize that the first magnetic steel 202 is disposed on the rotating shaft 1031, as Figure 2 and Figure 7 As shown, the encoder assembly 20 also includes a mounting member 206, which is in a cylindrical shape. One end of the mounting member 206 is sleeved on the rotating shaft 1031 and fixedly connected to the rotating shaft 1031, and its fixed connection method includes but is not limited to adhesive connection or interference fit. The end of the mounting member 206 facing away from the rotating shaft 1031 has a mounting groove 2061, and the first magnetic steel 202 is embedded in the mounting groove 2061 and is adhesively connected to the mounting member 206 by glue.

[0048] It should be noted that the first magnetic steel 202 is in a pancake shape and is radially magnetized, that is, one half of the first magnetic steel 202 is an N pole, and the other half of the first magnetic steel 202 is an S pole.

[0049] Furthermore, in order to enhance the magnetic field formed after the coil is energized, as Figure 2 and Figure 7 As shown, the rotor assembly 103 also includes two rotor cores 1032 and a second magnetic steel 1033, the second magnetic steel 1033 is located between the two rotor cores 1032, and the rotor core 1032 and the second magnetic steel 1033 are both sleeved on the rotating shaft 1031, and the two ends of the second magnetic steel 1033 are respectively abutted against the two rotor cores 1032; in addition, the stator core 101 is located on the outside of the rotor core 1032.

[0050] Furthermore, in order to provide support for the stator core 101, as Figure 2 and Figure 7 As shown, the stepper motor body 10 also includes a frame assembly 104, the frame assembly 104 includes a front frame 1041 and a rear frame 1042, the stator core 101 is located between the front frame 1041 and the rear frame 1042, Figure 8 , the front skeleton 1041 and the rear skeleton 1042 have a plurality of supporting parts 10411 at the opposite ends. In the embodiment of the present application, the number of the supporting parts 10411 is eight, and the eight supporting parts 10411 are arranged in a circular array. The supporting parts 10411 correspond one-to-one to the winding ends 1011, and both ends of each of the winding ends 1011 are against the supporting parts 10411 on the front skeleton 1041 and the rear skeleton 1042.

[0051] Furthermore, in order to make the stepper motor body 10 more compact, Figure 4 As shown, the front end cover 1021 and the rear end cover 1022 each have an embedded groove 1022 at the opposite end, and the end of the front skeleton 1041 away from the support portion 10411 is embedded in the embedded groove 10222 of the front end cover 1021, and the end of the rear skeleton 1042 away from the support portion 10411 is embedded in the embedded groove 10222 of the rear end cover 1022.

[0052] Furthermore, in order to realize the connection between the front end cover 1021, the stator core 101 and the front end cover 1021, as Figure 7 As shown, the stepper motor body 10 further includes a plurality of second fasteners 105 , one end of the second fastener 105 extends from the rear end cover 1022 into and successively passes through the stator core 101 and the front end cover 1021 .

[0053] Specifically, the number of the second fasteners 105 is two, and the second fasteners 105 are implemented as bolts. The two second fasteners 105 are arranged diagonally and symmetrically with the first fasteners 205 around the center plane of the rear end cover 1022. Figure 3 and Figure 4 The front end cover 1021, the rear end cover 1022 and the four corners of the stator core 101 all have threaded holes (not marked in the figure), and the first fastener 205 and the second fastener 105 are both threadedly connected to the stepper motor body 10 through the threaded holes.

[0054] In summary, the integrated stepper motor with a magnetic encoder according to the embodiment of the present application is explained, which provides the integrated stepper motor with a magnetic encoder with advantages such as preventing the lead ends from being worn by the rotor.

[0055] It is worth mentioning that in the embodiment of the present application, the stepper motor integrated machine with a magnetic encoder has a simple structure, does not involve complex manufacturing processes and expensive materials, and has high economic efficiency. At the same time, for manufacturers, the stepper motor integrated machine with a magnetic encoder provided in the present application is easy to produce and has low cost, which is more conducive to controlling production costs and further conducive to product promotion and use.

[0056] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A stepper motor integrated machine with a magnetic encoder, characterized in that: The stepper motor integrated machine with magnetic encoder includes A stepper motor body, the stepper motor body comprising a stator core, an end cover assembly and a rotor assembly, the stator core having a plurality of winding ends arranged in an annular shape, each of the winding ends being wound with a coil, the end cover assembly comprising a front cover and a rear cover, the stator core being located between the front cover and the rear cover, and the rear cover having a lead groove, the rotor assembly comprising a rotating shaft, both ends of the rotating shaft being rotatably mounted on the front cover and the rear cover respectively, and both ends of the rotating shaft passing through the front cover and the rear cover respectively; and An encoder component, which is fixedly connected to the stepper motor body, and the encoder component includes a connecting piece, a first magnetic steel and a driving plate, the connecting piece is located at the end of the rear end cover away from the stator core, and the connecting piece is fixedly connected to the rear end cover, the end of the connecting piece away from the rear end cover has a first accommodating cavity, the driving plate is arranged at the cavity mouth of the first accommodating cavity, the cavity bottom of the first accommodating cavity has a through hole, a blocking piece and a connecting hole, the blocking piece is located on the outside of the through hole, the first magnetic steel is fixedly installed on the end of the rotating shaft close to the rear end cover, the rotating shaft is provided with an end of the first magnetic steel extending into the through hole, and the first magnetic steel is close to the driving plate, the connecting hole is connected to the lead groove, the lead end of the coil is electrically connected to the end of the driving plate close to the first magnetic steel, and the blocking piece is located between the first magnetic steel and the lead end of the coil.

2. The stepper motor integrated machine with magnetic encoder according to claim 1, characterized in that: The encoder assembly also includes a cover plate and a plurality of first fasteners, the cover plate is located at the end of the drive plate away from the connecting member, the cover plate has a plurality of through first connecting holes, the bottom of the first accommodating cavity has a plurality of through second connecting holes, each of the first connecting holes is directly opposite to a second connecting hole, the first fasteners correspond to the first connecting holes one by one, and each of the first fasteners successively penetrates the corresponding first connecting hole and the second connecting hole and is fixedly connected to the stepper motor body.

3. The stepper motor integrated machine with magnetic encoder according to claim 2, characterized in that: The opening of the first accommodating cavity has a first annular support, the end of the cover plate close to the connecting member has a second accommodating cavity, and the opening of the second accommodating cavity has a second annular support. When the cover plate is connected to the connecting member, the two ends of the driving plate respectively abut against the first annular support and the second annular support.

4. The stepper motor integrated machine with magnetic encoder according to claim 1, characterized in that: The blocking member has an avoidance gap.

5. The stepper motor integrated machine with magnetic encoder according to any one of claims 1 to 4, characterized in that: The encoder assembly also includes a mounting member, one end of which is sleeved on the rotating shaft and fixedly connected to the rotating shaft, and the end of the mounting member facing away from the rotating shaft has a mounting groove, and the first magnetic steel is embedded in the mounting groove.

6. The stepper motor integrated machine with magnetic encoder according to any one of claims 1 to 4, characterized in that: The rotor assembly also includes two rotor cores and a second magnetic steel, wherein the second magnetic steel is located between the two rotor cores, and both the rotor core and the second magnetic steel are sleeved on the rotating shaft, and the stator core is located outside the rotor core.

7. The stepper motor integrated machine with magnetic encoder according to claim 6, characterized in that: The stepper motor body also includes a frame assembly, which includes a front frame and a rear frame. The stator core is located between the front frame and the rear frame. The opposite ends of the front frame and the rear frame have a plurality of support parts, and both ends of each winding end are against the support parts on the front frame and the rear frame.

8. The stepper motor integrated machine with magnetic encoder according to claim 7, characterized in that: The front end cover and the rear end cover each have an embedded groove at one opposite end, and the end of the front frame away from the support portion is embedded in the embedded groove of the front end cover, and the end of the rear frame away from the support portion is embedded in the embedded groove of the rear end cover.

9. The stepper motor integrated machine with magnetic encoder according to claim 8, characterized in that: The stepper motor body also includes a plurality of second fasteners, one end of which extends from the rear end cover into and successively passes through the stator core and the front end cover.

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