Stepping motor integrated with reduction gearbox

Abstract

The utility model relates to the technical field of stepping motors, in particular to a stepping motor integrated with a reduction gearbox, which comprises a stepping motor body, a brake module, a secondary speed reduction module and an output shaft, the stepping motor body comprises an end cover combination and a rotating shaft, the rotating shaft is rotatably mounted on the end cover combination, the brake module comprises a brake shell and a brake assembly, and the brake shell is connected with the secondary speed reduction module. The brake shell is connected with the end cover in a combined mode, the brake assembly is arranged in the brake shell and comprises a magnetizer, a flux sleeve, a coil framework, a brake pad, an elastic piece and a brake disc, the magnetizer is connected with the brake shell and provided with a second concave cavity, the flux sleeve and the coil framework are both fixedly installed in the second concave cavity, and the elastic piece is connected with the brake pad and the brake disc. The brake disc is connected with the rotating shaft, the brake pad is arranged on the rotating shaft in a sliding mode, the magnetic steel is embedded in the flux sleeve, and the output shaft is connected with the rotating shaft through the second-stage speed reduction module.By arranging the brake module, the advantages that when the stepping motor loses power, the output shaft stops rotating more rapidly, and the rotating angle is smaller are achieved.

Description

Technical Field

[0001] This application relates to the field of stepper motor technology, and more specifically to a stepper motor with an integrated gearbox. Background Technology

[0002] A stepper motor is a type of electric motor that converts electrical pulse signals into corresponding angular or linear displacement. Each time a pulse signal is input, the rotor rotates by an angle or moves forward one step.

[0003] Patent document (CN203645466U) discloses a structure for a geared stepper motor gearbox, including a stepper motor body, a gear reduction module, and an output shaft. The stepper motor body includes a rotor, which is connected to the output shaft via the gear reduction module. By setting the gear reduction module, the rotational speed of the output shaft is reduced. However, because the object connected to the output shaft is sometimes heavy, its rotational inertia is large. When the coil in the stepper motor body is de-energized, the output shaft may still rotate a predetermined angle, which is not suitable for applications requiring high precision.

[0004] Therefore, there is a need for a stepper motor with an integrated gearbox that includes a braking module, allows the output shaft to stop rotating more quickly and with a smaller rotation angle when the stepper motor loses power. Summary of the Invention

[0005] The main objective of this application is to provide a stepper motor with an integrated gearbox, wherein the stepper motor with the integrated gearbox includes a stepper motor body, a braking module, a two-stage reduction module, and an output shaft. The stepper motor body includes an end cover assembly and a rotating shaft, the rotating shaft being rotatably mounted on the end cover assembly. The end cover assembly includes a front cover and a rear cover. The braking module includes a brake housing and a brake assembly. The brake housing is connected to the end of the front cover opposite to the rear cover. The brake housing has a first cavity, and the brake assembly is placed within the first cavity. The brake assembly includes a magnetic conductor, a magnetic sleeve, a coil frame, a brake pad, an elastic element, and a brake disc. The magnetic conductor is disposed within the first cavity and is connected to the output shaft. The outer shell is fixedly connected. The magnetic conductor has a second concave cavity. The magnetic sleeve and the coil frame are both fixedly installed in the second concave cavity. The two ends of the elastic element are fixedly connected to the brake pad and the brake disc, respectively. The brake disc is sleeved on the rotating shaft and connected to the rotating shaft. The brake pad is slidably disposed on the rotating shaft along the axial direction of the rotating shaft. The magnetic sleeve has an embedded magnet and the brake pad is normally in contact with the end face of the magnetic conductor with the cavity opening of the second concave cavity. The coil frame contains a coil. The output shaft is connected to the rotating shaft through the two-stage reduction module. By setting the brake module, the advantages of the output shaft stopping faster and with a smaller rotation angle when the stepper motor loses power are achieved.

[0006] Another objective of this application is to provide a stepper motor with an integrated gearbox, wherein the two-stage reduction module includes a gearbox housing, a drive gear, several first driven teeth, a planetary carrier, and several second driven teeth. The stepper motor with the integrated gearbox also includes a support housing. The two ends of the gearbox housing are respectively connected to the brake housing and the support housing. The drive gear is fixedly mounted on one end of the shaft that extends into the gearbox housing. The gearbox housing has an internal tooth surface. The first driven teeth simultaneously mesh with the internal tooth surface and the drive gear. The planetary carrier has several first extensions near the end of the first driven teeth. Each first driven tooth has a first extension. The other end of the planetary carrier has a gear portion. Each second driven tooth simultaneously meshes with the internal tooth surface and the gear portion. The output shaft has several second extensions near the end of the two-stage reduction module. Each second driven tooth has a second extension. The output shaft is rotatably mounted on the support housing, thereby realizing the two-stage reduction module.

[0007] To achieve at least one of the above-mentioned objectives, this application provides a stepper motor with an integrated gearbox, wherein the stepper motor with the integrated gearbox includes:

[0008] A stepper motor body, the stepper motor body including an end cover assembly and a rotating shaft, the rotating shaft being rotatably mounted on the end cover assembly, the end cover assembly including a front end cover and a rear end cover; and

[0009] A braking module includes a brake housing and a brake assembly. The brake housing is connected to the end of the front end cover opposite to the rear end cover. The brake housing has a first cavity, and the brake assembly is placed within the first cavity. The brake assembly includes a magnetic conductor, a magnetic sleeve, a coil frame, a brake pad, an elastic element, and a brake disc. The magnetic conductor is disposed within the first cavity and fixedly connected to the brake housing. The magnetic conductor has a second cavity, and the magnetic sleeve and the coil frame are both fixedly installed within the second cavity. The two ends of the elastic element are fixedly connected to the brake pad and the brake disc, respectively. The brake disc is sleeved on and connected to the rotating shaft. The brake pad is slidably disposed on the rotating shaft along its axial direction. The magnetic sleeve contains an embedded magnet, and the brake pad, in its normal state, abuts against the end face of the magnetic conductor with the opening of the second cavity. The coil frame contains a coil.

[0010] Two-stage reduction module; and

[0011] The output shaft is connected to the rotating shaft via the two-stage reduction module.

[0012] In one or more embodiments of this application, the secondary reduction module includes a transmission housing, a driving gear, a plurality of first driven teeth, a planetary carrier, and a plurality of second driven teeth. The stepper motor of the integrated reduction gearbox also includes a support housing. The two ends of the transmission housing are respectively connected to the brake housing and the support housing. The driving gear is fixedly installed at one end of the rotating shaft that extends into the transmission housing. The transmission housing has an internal tooth surface. The first driven teeth mesh with both the internal tooth surface and the driving gear. The planetary carrier has a plurality of first extensions at one end near the first driven teeth. Each first driven tooth has a first extension. The other end of the planetary carrier has a gear portion. Each second driven tooth meshes with both the internal tooth surface and the gear portion. The output shaft has a plurality of second extensions at one end near the secondary reduction module. Each second driven tooth has a second extension. The output shaft is rotatably mounted on the support housing.

[0013] In one or more embodiments of this application, the stepper motor with the integrated gearbox further includes an encoder, which is located at the end of the stepper motor body away from the brake module.

[0014] In one or more embodiments of this application, the transmission housing has a plurality of oil filling holes, and the secondary reduction module further includes a collar with a notch. The collar is sleeved on the transmission housing, and when the collar rotates a predetermined angle, the collar covers or exposes the oil filling holes.

[0015] In one or more embodiments of this application, the brake disc has an annular portion at one end near the stepper motor body, and the sidewall of the annular portion has a plurality of through holes.

[0016] In one or more embodiments of this application, the brake housing has a plurality of external rotating holes, the external rotating holes communicating with the first recess, and the external rotating holes being directly opposite the annular portion of the brake disc.

[0017] In one or more embodiments of this application, the brake module further includes a plurality of plugs, which are inserted into the outer rotating hole and seal the outer rotating hole.

[0018] In one or more embodiments of this application, the stepper motor body further includes a stator core, a coil is provided inside the stator core, the stator core is located between the front end cover and the rear end cover, the rotating shaft passes through the stator core, and a rotor core is fixedly connected to the side wall of the rotating shaft located between the front end cover and the rear end cover.

[0019] In this embodiment, the stepper motor with integrated gearbox includes a stepper motor body, a brake module, a two-stage reduction module, and an output shaft. The stepper motor body includes an end cover assembly and a rotating shaft, which is rotatably mounted on the end cover assembly. The end cover assembly includes a front end cover and a rear end cover. The brake module includes a brake housing and a brake assembly. The brake housing is connected to the end of the front end cover away from the rear end cover. The brake housing has a first cavity, and the brake assembly is placed in the first cavity. The brake assembly includes a magnetic conductor, a magnetic sleeve, a coil frame, a brake pad, an elastic element, and a brake disc. The magnetic conductor is disposed in the first cavity and fixed to the brake housing. The magnetic conductor has a second concave cavity, and the magnetic sleeve and coil frame are both fixedly installed in the second concave cavity. The two ends of the elastic element are fixedly connected to the brake pad and the brake disc, respectively. The brake disc is sleeved on the rotating shaft and connected to the rotating shaft. The brake pad is slidably mounted on the rotating shaft along the axial direction of the rotating shaft. The magnetic sleeve has an embedded magnet, which makes the brake pad abut against the end face of the magnetic conductor with the second concave cavity opening under normal conditions. The coil frame contains a coil. The output shaft and the rotating shaft are connected through a two-stage reduction module. By setting the brake module, the advantages of the output shaft stopping faster and with a smaller rotation angle when the stepper motor loses power are achieved. Attached Figure Description

[0020] These and / or other aspects and advantages of this application will become clearer and more readily understood from the following detailed description of embodiments of this application taken in conjunction with the accompanying drawings, wherein:

[0021] Figure 1 The figure shows a schematic diagram of the structure of a stepper motor with an integrated gearbox according to this application;

[0022] Figure 2 The diagram shows a schematic of the brake module.

[0023] Figure 3 The diagram shows a structural schematic of the deceleration module from one perspective;

[0024] Figure 4 The diagram shows an exploded view of the deceleration module;

[0025] Figure 5 The diagram illustrates the structure of the collar;

[0026] Figure 6 The figure shows a schematic diagram of the exposed external rotating hole of a stepper motor in an integrated gearbox according to this application. Detailed Implementation

[0027] The terms and words used in the following specification and claims are not limited to their literal meaning, but are used solely by the inventors to enable a clear and consistent understanding of this application. Therefore, it will be apparent to those skilled in the art that the following description of various embodiments of this application is provided for illustrative purposes only and not for the purpose of limiting the application as defined in the appended claims and their equivalents.

[0028] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0029] While ordinal numbers such as "first," "second," etc., will be used to describe various components, there is no limitation on which components are used 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 similarly, 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 of the associated listed items.

[0030] The terminology used herein is for the purpose of describing various embodiments only and is not intended to be limiting. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. It will also be understood that the terms “comprising” and / or “having” as 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.

[0031] A stepper motor with an illustrative integrated gearbox, for reference. Figures 1 to 6 According to a preferred embodiment of the present invention, a stepper motor with an integrated gearbox includes a stepper motor body 10, a brake module 20, a two-stage reduction module 30, and an output shaft 40.

[0032] Specifically, such as Figure 1 and Figure 2As shown, the stepper motor body 10 includes an end cover assembly and a rotating shaft 101. The rotating shaft 101 is rotatably mounted on the end cover assembly, which includes a front end cover 102 and a rear end cover 103. Additionally, the brake module 20 includes a brake housing 201 and a brake assembly 202. The brake housing 201 is connected to the end of the front end cover 102 opposite to the rear end cover 103. The brake housing 201 has a first cavity 2011, and the brake assembly 202 is placed within the first cavity 2011. The brake assembly 202 includes a magnetic conductor 2021, a magnetic sleeve 2022, a coil frame 2023, a brake pad 2024, an elastic element 2025, and a brake disc 2026. The magnetic conductor 2021 is disposed within the first cavity 2011 and fixedly connected to the brake housing 201. The magnetic conductor 2021 has a second cavity 20211. The magnetic sleeve 2022 and the coil frame 2023 are both fixedly installed in the second cavity 20211. The two ends of the elastic member 2025 are fixedly connected to the brake pad 2024 and the brake disc 2026, respectively. The brake disc 2026 is sleeved on the rotating shaft 101 and connected to the rotating shaft 101. The brake pad 2024 is slidably disposed on the rotating shaft 101 along the axial direction of the rotating shaft 101. The magnetic sleeve 2022 has a magnet embedded in it, and the brake pad 2024 is normally in contact with the end face of the magnetic conductor 2021 with the cavity opening of the second cavity 20211. The coil frame 2023 contains a coil. In addition, the output shaft 40 is connected to the rotating shaft 101 through the secondary reduction module 30.

[0033] It should be noted that the elastic element 2025 is preferably a spring sheet. The magnet embedded in the magnetic sleeve 2022 applies a magnetic attraction force to the brake pad 2024, causing the brake pad 2024 to move a predetermined distance toward the magnetic body 2021 and tightly abut against the end face of the magnetic body 2021. At this time, the spring sheet undergoes a certain deformation. In this application, the brake pad 2024 moves 0.5mm toward the magnetic body 2021 under the magnetic force of the magnet. It should be pointed out that since the two ends of the elastic element 2025 are respectively connected to the brake pad 2024 and the brake disc 2026, and the deformed spring sheet can only undergo a small and limited deformation, when the brake pad 2024 is difficult to rotate under the magnetic force of the magnetic sleeve 2022, the brake disc 2024... 26 will then rotate slightly under the constraint of the spring plate, and will not rotate further. Since the brake disc 2026 and the rotating shaft 101 can be considered to be fixedly connected, when the brake disc 2026 stops rotating, the rotating shaft 101 also stops rotating. The rotating shaft 101 and the output shaft 40 are connected through the secondary reduction module 30. When the rotating shaft 101 does not rotate circumferentially, the output shaft 40 also stops rotating circumferentially. This avoids the output shaft 40 from rotating a large angle due to the inertia of the external connecting parts after the stepper motor body 10 loses power. It is evident that, compared with the prior art, this application has the advantages of having a brake module, faster stopping of the output shaft and smaller rotation angle when the stepper motor loses power, by setting the brake module 20 between the secondary reduction module 30 and the stepper motor body 10.

[0034] Additionally, it should be noted that when the coil inside the stepper motor body 10 is energized, the coil on the coil frame 2023 is also energized. At this time, the coil on the coil frame 2023 will apply a magnetic field in the opposite direction to counteract the magnetic attraction force applied by the magnet to the brake pad 2024. Then, under its own elastic force, the spring plate will drive the brake pad 2024 to move away from the magnetic conductor 2021, and prevent the brake pad 2024 from contacting the end face of the magnetic conductor 2021, and follow the brake disc 2026 to rotate circumferentially.

[0035] Furthermore, in this embodiment of the application, to implement the secondary deceleration module 30, as follows: Figure 1 , Figure 3 and Figure 4As shown, the secondary reduction module 30 includes a transmission housing 301, a driving gear 302, several first driven gears 303, a planetary carrier 304, and several second driven gears 305. The stepper motor of the integrated reduction gearbox also includes a support housing 50. The two ends of the transmission housing 301 are respectively connected to the brake housing 201 and the support housing 50. The driving gear 302 is fixedly installed at one end of the rotating shaft 101 that extends into the transmission housing 301. The transmission housing 301 has an internal tooth surface 3011. The first driven gears 303 simultaneously interact with the internal tooth surface 3011 and the driving gear. The planetary carrier 304 has several first extensions at one end near the first driven tooth 303, and each first driven tooth 303 is provided with a first extension. The other end of the planetary carrier 304 has a gear portion 3041. Each second driven tooth 305 meshes with both the internal tooth surface 3011 and the gear portion 3041. The output shaft 40 has several second extensions at one end near the second-stage reduction module 30, and each second driven tooth 305 is provided with a second extension. The output shaft 40 is rotatably mounted on the supporting housing 50.

[0036] It should be noted that when the rotating shaft 101 rotates, it drives the driving gear 302 to rotate synchronously. The first driven gear 303, meshing with the driving gear 302, will rotate along its own axis along the internal tooth surface 3011 on the transmission housing 301, and simultaneously revolve around the central axis of the transmission housing 301. Since the planetary carrier 304 and the first driven gear 303 are connected through the first extension, i.e., both ends of the first extension pass through the center of the first driven gear 303 and the planetary carrier 304 respectively, the revolution of the first driven gear 303 will drive the planetary carrier 304 to rotate circumferentially. The planetary carrier 304 rotates, causing the gear 3041 on the other end of the planetary carrier 304 to rotate. This causes each of the second driven teeth 305 to rotate on its own axis and revolve around the central axis of the transmission housing 301. The revolve of the second driven teeth 305 in turn causes the second extension to rotate the output shaft 40 circumferentially. Since the number of teeth on the internal tooth surface 3011 is much greater than the number of teeth on the first driven teeth 303 and the second driven teeth 305, the rotational speed of the planetary carrier 304 is lower than that of the rotating shaft 101, and the rotational speed of the output shaft 40 is even lower than that of the planetary carrier 304.

[0037] Furthermore, such as Figure 1As shown, the stepper motor with the integrated gearbox also includes an encoder 60, which is located at the end of the stepper motor body 10 away from the brake module 20. Since the encoder 60 is a mature technology, its specific structure will not be described in detail here. The encoder 60 includes, but is not limited to, the encoder 60 disclosed in patent document (CN212850156U).

[0038] Furthermore, since the first driven gear 303 and the second driven gear 305 are located inside the transmission housing 301, their lubricating oil may dry out after prolonged use. To facilitate relubrication, such as... Figure 3 As shown, the transmission housing 301 has several oil filling holes 3012, such as... Figure 1 and Figure 5 As shown, the secondary reduction module 30 also includes a collar 306, which has a notch 3061. The collar 306 is sleeved on the transmission housing 301. When the collar 306 rotates a predetermined angle, the collar 306 covers or exposes the oil filling hole 3012.

[0039] It should be noted that, in order to achieve the collar 306 being fitted onto the transmission housing 301, the collar 306 can be formed by welding two separate arc-shaped pieces together after they are attached to the side wall of the transmission housing 301, thus forming the collar 306 with the notch 3061.

[0040] In addition, in this embodiment of the application, to achieve the connection between the brake disc 2026 and the rotating shaft 101, such as Figure 2 As shown, the brake disc 2026 has an annular portion 20261 at one end near the stepper motor body 10, and the side wall of the annular portion 20261 has a plurality of through holes 20262.

[0041] It should be noted that the through hole 20262 is a threaded hole. The brake disc 2026 is fixed on the rotating shaft 101 by screwing a bolt into the through hole 20262 and having it abut against the side wall of the rotating shaft 101.

[0042] Furthermore, since the elastic properties of the elastic element 2025 may decrease after long-term use, the brake pad 2024 may still partially contact the magnetic conductor 2021 after the coil is de-energized, affecting the use of the stepper motor of the integrated gearbox. In view of this, in this embodiment, the brake housing 201 has a plurality of external rotating holes 2012, the external rotating holes 2012 are connected to the first cavity 2011, and the external rotating holes 2012 are directly opposite the annular portion 20261 of the brake disc 2026.

[0043] In addition, to prevent external dust from entering the outer rotating hole 2012 under normal conditions, the brake module 20 also includes several plugs 203, which are inserted into the outer rotating hole 2012 and seal the outer rotating hole 2012.

[0044] It should be noted that when abnormal noise is heard from the friction between the brake pad 2024 and the magnetic conductor 2021 during the operation of the stepper motor of the integrated gearbox, the stepper motor of the integrated gearbox can be de-energized, the retainer 203 can be removed, a screwdriver can be inserted into the external screw hole 2012 and the bolt can be loosened, the brake disc 2026 can be moved a predetermined distance toward the stepper motor body 10, and then the bolt can be tightened to fix the position of the brake disc 2026.

[0045] Furthermore, in the embodiments of this application, such as Figure 1 As shown, the stepper motor body 10 also includes a stator core 104, within which a coil is disposed. The stator core 104 is located between the front end cover 102 and the rear end cover 103. A rotating shaft 101 passes through the stator core 104, and a rotor core 1011 is fixedly connected to the side wall of the rotating shaft 101 located between the front end cover 102 and the rear end cover 103. When the coil within the stator core 104 is energized, the rotating shaft 101 rotates.

[0046] In summary, the stepper motor with integrated gearbox based on the embodiments of this application is explained, which provides the stepper motor with integrated gearbox with advantages such as having a brake module, faster output shaft stopping when the stepper motor loses power, and smaller rotation angle.

[0047] It is worth mentioning that, in this embodiment, the stepper motor of the integrated gearbox has a simple structure, does not involve complex manufacturing processes or expensive materials, and is highly economical. At the same time, for manufacturers, the stepper motor of the integrated gearbox provided in this application is easy to produce and has low cost, which is more conducive to controlling production costs and further facilitates product promotion and use.

[0048] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The function and structural principle of the present invention have been shown and explained in the embodiments, and any modifications or variations may be made to the implementation of the present invention without departing from these principles.

Claims

1. A stepper motor with integrated reduction gearbox, characterized by: The integrated reduction gearbox step motor comprises a step motor body, the step motor body comprising an end cover assembly and a rotating shaft, the rotating shaft being rotatably installed on the end cover assembly, the end cover assembly comprising a front end cover and a rear end cover; and a brake module, the brake module comprising a brake shell and a brake assembly, the brake shell being connected to an end of the front end cover away from the rear end cover, the brake shell having a first recess, the brake assembly being arranged in the first recess, the brake assembly comprising a magnet guide, a magnet guide sleeve, a coil framework, a brake pad, an elastic member and a brake disc, the magnet guide being arranged in the first recess and fixedly connected to the brake shell, the magnet guide having a second recess, the magnet guide sleeve and the coil framework being fixedly installed in the second recess, the elastic member having two ends fixedly connected to the brake pad and the brake disc respectively, the brake disc being sleeved on the rotating shaft and connected to the rotating shaft, the brake pad being arranged on the rotating shaft in sliding manner along the axial direction of the rotating shaft, the magnet guide sleeve being embedded with a magnetic steel and allowing the brake pad to abut against an end face of an end of the second recess of the magnet guide in normal state, the coil framework being provided with a coil; and a secondary reduction module; and an output shaft, the output shaft being connected to the rotating shaft through the secondary reduction module.

2. The integrated reduction gearbox stepper motor of claim 1, wherein: The secondary reduction module comprises a gear shift shell, a driving gear, a plurality of first driven gears, a planet carrier and a plurality of second driven gears, the integrated reduction gearbox step motor further comprising a supporting shell, two ends of the gear shift shell being connected to the brake shell and the supporting shell respectively, the driving gear being fixedly installed at an end of the rotating shaft extending into the gear shift shell, the gear shift shell having an inner tooth surface, the first driven gears being engaged with the inner tooth surface and the driving gear simultaneously, the planet carrier having a plurality of first extension portions at an end close to the first driven gears, each of the first driven gears being provided with a first extension portion, the planet carrier having a gear portion at another end, each of the second driven gears being engaged with the inner tooth surface and the gear portion simultaneously, the output shaft having a plurality of second extension portions at an end close to the secondary reduction module, each of the second driven gears being provided with a second extension portion, the output shaft being rotatably installed on the supporting shell.

3. The integrated reduction gearbox stepper motor of claim 2, wherein: The integrated reduction gearbox step motor further comprises an encoder, the encoder being arranged at an end of the step motor body away from the brake module.

4. The integrated reduction gearbox stepper motor of claim 3, wherein: The gear shift shell has a plurality of oil adding holes, the secondary reduction module further comprising a ring, the ring having a notch, the ring being sleeved on the gear shift shell, the ring covering or uncovering the oil adding holes after the ring is rotated by a predetermined angle.

5. The integrated reduction gearbox stepper motor of claim 4, wherein: The brake disc has a circular ring portion at an end close to the step motor body, the side wall of the circular ring portion having a plurality of through holes.

6. The integrated reduction gearbox stepper motor of claim 5, wherein: The brake shell has a plurality of outer screw holes, the outer screw holes being communicated with the first recess, and the outer screw holes being opposite to the circular ring portion of the brake disc.

7. The integrated reduction gearbox stepper motor of claim 6, wherein: The brake module further comprises a plurality of plugs, the plugs being inserted into the outer screw holes and closing the outer screw holes.

8. The integrated reduction gearbox stepper motor of claim 7, wherein: The stepping motor body further comprises a stator core, a coil is arranged in the stator core, the stator core is located between the front end cover and the rear end cover, the rotating shaft passes through the stator core, and the rotating shaft is fixedly connected with a rotor core on the side wall between the front end cover and the rear end cover.

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