Three-jaw stepping motor

Abstract

The utility model relates to the technical field of stepping motors, in particular to a three-jaw stepping motor which comprises a stepping motor body and a clamping jaw executing mechanism, the stepping motor body is provided with a rotatable lead screw, the clamping jaw executing mechanism comprises a base, three clamping jaws and a pushing assembly, the base is connected with the stepping motor body, and the three clamping jaws are arranged on the base. The base is provided with three first guide grooves, clamping jaws are arranged in the first guide grooves in a sliding mode, each clamping jaw is provided with an inclined second guide groove, the pushing assembly comprises a threaded sleeve and a contact piece, the threaded sleeve is provided with a first threaded hole, the lead screw is in threaded connection with the first threaded hole, one end of the contact piece is fixedly connected with the threaded sleeve, and the other end of the contact piece is provided with three matching ends. According to the three-jaw actuating mechanism, when the lead screw rotates, the threaded sleeve and the contact piece move axially, the clamping jaws are driven to move in the opposite direction or the opposite direction along the base, the three-jaw actuating mechanism and the stepping motor are integrated, the integration degree is higher, and the overall size is smaller.

Description

Technical Field

[0001] This application relates to the field of stepper motor technology, and more specifically to a three-jaw stepper motor. 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 (CN212761179U) discloses a three-jaw chuck fixture, including a stepper motor, a synchronous belt, a spindle, a chuck, and a three-jaw actuator. When the stepper motor shaft rotates, the spindle rotates and drives the three-jaw actuator to move within the chuck. However, in existing designs, the stepper motor and the three-jaw actuator are not integrated, resulting in low integration, an insufficiently compact structure, and unsuitability for applications requiring smaller overall dimensions.

[0004] Therefore, there is a need for a three-jaw stepper motor that integrates the three-jaw actuator with the stepper motor, has a higher degree of integration, and a smaller overall size. Summary of the Invention

[0005] The main objective of this application is to provide a three-jaw stepper motor, wherein the three-jaw stepper motor includes a stepper motor body and a gripper actuator. The stepper motor body has a rotatable lead screw, and the gripper actuator includes a base, three grippers, and a push assembly. The base is connected to the stepper motor body and has three first guide grooves arranged in a circular array. Each of the first guide grooves has a gripper slidably disposed therein, and each gripper has a second guide groove arranged at an inclination. The push assembly includes a threaded sleeve and a contact member. The threaded sleeve has a first threaded hole, and the lead screw is threadedly connected to the first threaded hole. One end of the contact member is fixedly connected to the threaded sleeve, and the other end of the contact member has three mating ends arranged in a circular array. Each mating end is arranged at an inclination and slidably disposed in a corresponding second guide groove. When the lead screw rotates, the threaded sleeve and the contact member move axially, driving the grippers to move towards or away from each other along the base. Compared with the prior art, this method has the advantages of integrating the three-jaw actuator and the stepper motor into one unit, resulting in higher integration and a smaller overall size.

[0006] Another objective of this application is to provide a three-jaw stepper motor, wherein the gripper actuator further includes a connecting plate, a guide sleeve, and a cover plate. The connecting plate is connected to the stepper motor body, the guide sleeve is disposed on the connecting plate, and the base has a guide groove at one end near the stepper motor body. The guide sleeve extends into the guide groove at one end away from the connecting plate. The base is connected to the connecting plate, and the base has a first placement groove at one end away from the stepper motor body. The cover plate is disposed in the first placement groove, and the cover plate is detachably connected to the base, thus providing a prerequisite for the gripper actuator to be installed on the stepper motor body.

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

[0008] A stepper motor body, the stepper motor body having a rotatable lead screw; and

[0009] A gripper actuator includes a base, three grippers, and a pushing assembly. The base is connected to the stepper motor body. The base has three first guide grooves arranged in a circular array. A gripper is slidably disposed in each of the first guide grooves. Each gripper has a second guide groove arranged at an incline. The pushing assembly includes a threaded sleeve and a contact member. The threaded sleeve has a first threaded hole. A lead screw is threadedly connected to the first threaded hole. One end of the contact member is fixedly connected to the threaded sleeve. The other end of the contact member has three mating ends arranged in a circular array. Each mating end is arranged at an incline and slidably disposed in the corresponding second guide groove.

[0010] In one or more embodiments of this application, the gripper actuator further includes a connecting plate, a guide sleeve, and a cover plate. The connecting plate is connected to the stepper motor body, the guide sleeve is disposed on the connecting plate, and the base has a guide groove at one end near the stepper motor body. The guide sleeve extends into the guide groove at one end away from the connecting plate. The base is connected to the connecting plate, and the base has a first placement groove at one end away from the stepper motor body. The cover plate is disposed in the first placement groove, and the cover plate is detachably connected to the base.

[0011] In one or more embodiments of this application, the base has a second placement groove at one end near the stepper motor body, and an elastic pad is provided in the second placement groove, which is directly opposite the connecting plate.

[0012] In one or more embodiments of this application, the sidewall of the cover plate has three notches arranged in a circular array, and a claw is slidably disposed in each notch.

[0013] In one or more embodiments of this application, each of the contact members has a threaded cylindrical portion at the end away from the mating end, and the end of the threaded sleeve near the contact member has a second threaded hole. The threaded cylindrical portion is threadedly connected to the second threaded hole, and glue is filled between the threaded cylindrical portion and the second threaded hole.

[0014] In one or more embodiments of this application, each mating end of the contact member has a vertical inclined section, a horizontal inclined section, and a third guide groove. The vertical inclined section is located at one end of the horizontal inclined section near the central axis of the contact member. The top surface of the horizontal inclined section includes a first inclined surface. The third guide groove is located at one end of the horizontal inclined section near the vertical inclined section. The two side walls of the third guide groove are a second inclined surface and a third inclined surface, respectively. The first inclined surface, the second inclined surface, and the third inclined surface are arranged in parallel. The vertical inclined section and the horizontal inclined section form a T-shaped structure extending in an inclined direction. The second guide groove on the claw is a T-shaped groove extending in an inclined direction. The bottom wall of the T-shaped groove is a fourth inclined surface. The side wall of the T-shaped groove near the groove opening is a fifth inclined surface. The end of the claw with the second guide groove has a sixth inclined surface. When the mating end is slidably disposed in the corresponding second guide groove, the first inclined surface is in contact with the fourth inclined surface, the second inclined surface is in contact with the fifth inclined surface, and the third inclined surface is in contact with the sixth inclined surface.

[0015] In one or more embodiments of this application, each of the claws has two threaded holes and a locking groove at one end away from the stepper motor body, and the locking groove is located between the two threaded holes.

[0016] In one or more embodiments of this application, the base has two through holes and a plurality of assembly holes.

[0017] In this embodiment, the three-jaw stepper motor includes a stepper motor body and a gripper actuator. The stepper motor body has a rotatable lead screw. The gripper actuator includes a base, three jaws, and a push assembly. The base is connected to the stepper motor body and has three first guide grooves. A jaw is slidably disposed in the first guide groove. The jaw has an inclined second guide groove. The push assembly includes a threaded sleeve and a contact member. The threaded sleeve has a first threaded hole. The lead screw is threadedly connected to the first threaded hole. One end of the contact member is fixedly connected to the threaded sleeve, and the other end has three mating ends. Each mating end is inclined and slidably disposed in the corresponding second guide groove. When the lead screw rotates, the threaded sleeve and the contact member move axially and drive the jaws to move towards or away from each other along the base. Compared with the prior art, this method has the advantages of integrating the three-jaw actuator and the stepper motor into one unit, resulting in higher integration and smaller overall size. Attached Figure Description

[0018] 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:

[0019] Figure 1 The figure shows a structural schematic diagram of a three-jaw stepper motor according to this application;

[0020] Figure 2 The illustration shows a cross-sectional view of a three-jaw stepper motor according to this application;

[0021] Figure 3 The diagram illustrates the structure of the base;

[0022] Figure 4 The diagram illustrates the structure of the contact element;

[0023] Figure 5 The diagram illustrates the structure of the chuck claw.

[0024] Figure 6 The diagram illustrates the contact between the contact element and the jaws. Detailed Implementation

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] Schematic three-jaw stepper motor, for reference Figures 1 to 6 According to a preferred embodiment of the present invention, a three-jaw stepper motor includes a stepper motor body 10 and a gripper actuator 20.

[0030] Specifically, the stepper motor body 10 has a rotatable lead screw 101. The lead screw 101 can be considered as being formed by an external thread at the front end of the shaft of the stepper motor body 10. Since the stepper motor body 10 is a mature technology and widely used in the market, its specific structure and model will not be described in detail here. The stepper motor body 10 includes, but is not limited to, the stepper motor with a rotatable lead screw 101 disclosed in patent document (CN206967988U); Additionally, as... Figure 2 As shown, the gripper actuator 20 includes a base 201, three grippers 202, and a pushing assembly 203. The base 201 is connected to the stepper motor body 10. The base 201 has three first guide grooves 2011 arranged in a ring array. Each first guide groove 2011 has a gripper 202 slidably disposed therein. The base 201 has a central hole 2012 at its center, which communicates with each of the first guide grooves 2011. Each gripper 202 has a second guide groove 2021 arranged at an incline. The pushing assembly 203 includes a... The threaded sleeve 2031 and a contact member 2032 are provided. The threaded sleeve 2031 has a first threaded hole 20311. The lead screw 101 is threadedly connected to the first threaded hole 20311. One end of the contact member 2032 is fixedly connected to the threaded sleeve 2031. The threaded sleeve 2031 is slidably disposed in the central hole 2012 along the central axis direction of the central hole 2012. The other end of the contact member 2032 has three mating ends 20321 arranged in a ring array. Each mating end 20321 is inclined and slidably disposed in the corresponding second guide groove 2021.

[0031] It should be noted that when the coil inside the stepper motor body 10 is energized and the lead screw 101 rotates circumferentially, since the threaded sleeve 2031 and the contact member 2032 can be considered as a fixed connection, the threaded sleeve 2031 moves axially along the axial direction of the lead screw 101, which can be regarded as the threaded sleeve 2031 and the lead screw 101 forming a lead screw 101 slider structure. At the same time, the contact member 2032 moves axially accordingly. Since the first guide groove 2011 and the second guide groove 2021 are both arranged at an inclination, when the contact member 2032 moves axially away from or towards the stepper motor body 10, the three mating ends 20321 apply an upward or downward force to the corresponding claws 202, causing the claws 202 to move in opposite directions or towards each other along the base 201, thus realizing the action of the three claws 202. It is evident that, compared to the existing technology which requires the addition of a synchronous belt or other transmission mechanism between the chuck actuator and the stepper motor body, this application has the advantage of integrating the three-jaw actuator and the stepper motor into one unit, resulting in higher integration and a smaller overall size.

[0032] Furthermore, to enable the base 201 to be mounted on the stepper motor body 10, as follows: Figure 2 As shown, the gripper actuator 20 further includes a connecting plate 204, a guide sleeve 205, and a cover plate 206. The connecting plate 204 is connected to the stepper motor body 10, and the guide sleeve 205 is disposed on the connecting plate 204. Specifically, as shown... Figure 2 As shown, the connecting plate 204 has a groove (not shown) for placing the guide sleeve 205. The base 201 has a fourth guide groove (not shown) at one end near the stepper motor body 10. The end of the guide sleeve 205 facing away from the connecting plate 204 extends into the fourth guide groove. The base 201 is connected to the connecting plate 204, as shown... Figure 3 As shown, the base 201 has a first placement groove 2013 at one end away from the stepper motor body 10. The cover plate 206 is provided in the first placement groove 2013, and the cover plate 206 is detachably connected to the base 201.

[0033] It should be noted that when installing the gripper actuator 20 onto the stepper motor body 10, the connecting plate 204 is first fixedly connected to the front end cover of the stepper motor body 10 by bolts. Then, the guide sleeve 205 is placed into the groove. Next, the contact member 2032 is fixedly connected to the threaded sleeve 2031 to form the pushing assembly 203. The pushing assembly 203 is then passed through the central hole 2012 of the base 201. Simultaneously, the three grippers are sequentially placed into the first guide groove 2. Within 011, the mating end 20321 is inserted into the second guide groove 2021. Then, the cover plate 206 is fixedly connected to the base 201 by bolts to prevent the pushing component 203 from moving away from the stepper motor body 10 and disengaging from the base 201 before the base 201 is connected to the connecting plate 204. Then, the first threaded hole 20311 of the screw sleeve 2031 is threadedly connected to the lead screw 101. Finally, the cover plate 206 is bolted to the connecting plate 204.

[0034] Furthermore, for ease of installation, such as Figure 2 As shown, the base 201 has a second placement groove (not shown in the figure) at one end near the stepper motor body 10. The cross-section of the second placement groove is preferably a circular hole. An elastic pad 2014 is provided in the second placement groove. The second placement groove is directly opposite the connecting plate 204. During installation, by setting the elastic pad 2014, a certain installation space is provided in the axial direction of the stepper motor body 10, so that the threaded sleeve 2031 is threadedly connected to the lead screw 101, and the connecting hole on the base 201 is directly opposite the connecting hole on the connecting plate 204.

[0035] Furthermore, to improve the guiding effect of the claw 202 during sliding, such as Figure 1 As shown, the side wall of the cover plate 206 has three notches 2061 arranged in a ring array, and a claw 202 is slidably disposed in each notch 2061.

[0036] Furthermore, to achieve a fixed connection between the contact element 2032 and the threaded sleeve 2031, such as... Figure 2As shown, each of the contact members 2032 has a threaded post portion 20322 at the end opposite to the mating end 20321, and the end of the threaded sleeve 2031 near the contact member 2032 has a second threaded hole 20312. The threaded post portion 20322 is threadedly connected to the second threaded hole 20312, and the space between the threaded post portion 20322 and the second threaded hole 20312 is filled with glue. That is, before screwing the threaded post portion 20322 into the second threaded hole 20312, thread glue is applied to the threaded post portion 20322 or the second threaded hole 20312.

[0037] Furthermore, to enable the mating end 20321 to slide within the second guide groove 2021, as follows: Figures 4 to 6 As shown, each mating end 20321 of the contact member 2032 has a vertical inclined section 20322, a horizontal inclined section 20323, and a plurality of third guide grooves 20324. The vertical inclined section 20322 is located at one end of the horizontal inclined section 20323 near the central axis of the contact member 2032. The top surface of the horizontal inclined section 20323 includes a first inclined surface 203231. The third guide grooves 20324 are located at one end of the horizontal inclined section 20323 near the vertical inclined section 20322. The two side walls of the third guide groove 20324 are a second inclined surface 20325 and a third inclined surface 20326, respectively. The first inclined surface 203231, the second inclined surface 20325, and the third inclined surface 20326 are arranged in parallel. Segment 20322 and the inclined segment 20323 form a T-shaped structure extending in an inclined direction. The second guide groove 2021 on the claw 202 is a T-shaped groove extending in an inclined direction. The bottom wall of the T-shaped groove is a fourth inclined surface 20211, and the side wall of the T-shaped groove near the groove opening is a fifth inclined surface 20212. The end of the claw 202 with the second guide groove 2021 has a sixth inclined surface 2022. When the mating end 20321 is slidably disposed in the corresponding second guide groove 2021, the first inclined surface 203231 fits with the fourth inclined surface 20211, the second inclined surface 20325 fits with the fifth inclined surface 20212, and the third inclined surface 20326 fits with the sixth inclined surface 2022.

[0038] Furthermore, to improve the versatility of the gripper 202, such as... Figure 1 As shown, each of the claws 202 has two threaded holes 2023 and a locking groove 2024 at one end away from the stepper motor body 10, and the locking groove 2024 is located between the two threaded holes 2023.

[0039] Furthermore, to fix the base 201, such as Figure 1As shown, the base 201 has two through holes 2015 and several assembly holes (not shown in the figure).

[0040] In summary, the three-jaw stepper motor described in the embodiments of this application is explained, which provides advantages such as integrating the three-jaw actuator and the stepper motor into one unit, higher integration, and smaller overall size.

[0041] It is worth mentioning that, in this embodiment, the three-jaw stepper motor has a simple structure, does not involve complex manufacturing processes or expensive materials, and is highly economical. At the same time, for manufacturers, the three-jaw stepper motor provided in this application is easy to produce and inexpensive, which is more conducive to controlling production costs and further facilitates product promotion and use.

[0042] 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 three-prong stepper motor, characterized by: The three-claw stepping motor comprises a stepping motor body having a rotatable screw rod; and a claw executing mechanism comprising a base, three claws and a pushing assembly, the base being connected with the stepping motor body, the base having three first guide grooves arranged in a circular array, each of the first guide grooves slidingly accommodating a claw, each of the claws having a second guide groove arranged obliquely, the pushing assembly comprising a screw sleeve having a first threaded hole and a contact piece, the screw rod being threadedly connected with the first threaded hole, one end of the contact piece being fixedly connected with the screw sleeve, the other end of the contact piece having three matching ends arranged in a circular array, each of the matching ends being arranged obliquely and slidingly arranged in the corresponding second guide groove.

2. The three-prong stepper motor of claim 1, wherein: The claw executing mechanism further comprises a connecting plate, a guide sleeve and a cover plate, the connecting plate being connected with the stepping motor body, the guide sleeve being arranged on the connecting plate, one end of the base close to the stepping motor body having a guide groove, one end of the guide sleeve away from the connecting plate extending into the guide groove, the base being connected with the connecting plate, one end of the base away from the stepping motor body having a first placing groove, the cover plate being arranged in the first placing groove, the cover plate being detachably connected with the base.

3. The three-prong stepper motor of claim 2, wherein: One end of the base close to the stepping motor body further has a second placing groove, the second placing groove accommodating an elastic pad, the second placing groove being opposite to the connecting plate.

4. The three-prong stepper motor of claim 2, wherein: The sidewall of the cover plate has three notch grooves arranged in a circular array, each of the notch grooves slidingly accommodating a claw.

5. The three-prong stepper motor of claim 2, wherein: Each of the contact pieces has a threaded column part at the end away from the matching end, one end of the screw sleeve close to the contact piece having a second threaded hole, the threaded column part being threadedly connected with the second threaded hole, and glue being filled between the threaded column part and the second threaded hole.

6. The three-prong stepper motor of claim 5, wherein: Each of the matching ends of the contact piece has a vertical inclined section, a horizontal inclined section and a third guide groove, the vertical inclined section being located at the end of the horizontal inclined section close to the central axis of the contact piece, the top surface of the horizontal inclined section comprising a first inclined surface, the third guide groove being located at the end of the horizontal inclined section close to the vertical inclined section, the two sidewalls of the third guide groove being a second inclined surface and a third inclined surface respectively, the first inclined surface and the second inclined surface being parallel to the third inclined surface, the vertical inclined section and the horizontal inclined section forming a T-shaped structure extending in an inclined direction, the second guide groove of the claw being a T-shaped groove extending in an inclined direction, the bottom wall of the T-shaped groove being a fourth inclined surface, one sidewall of the T-shaped groove close to the groove opening being a fifth inclined surface, one end of the claw having the second guide groove having a sixth inclined surface, when the matching end is slidingly arranged in the corresponding second guide groove, the first inclined surface is in contact with the fourth inclined surface, the second inclined surface is in contact with the fifth inclined surface, and the third inclined surface is in contact with the sixth inclined surface.

7. The three-prong stepper motor of claim 1, wherein: Each of the claws has two threaded holes and a clamping slot at one end away from the stepping motor body.

8. The three-prong stepper motor of claim 1, wherein: The base has two through holes and several assembly holes.

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