Double-finger closed-loop stepping motor

Abstract

The utility model relates to the technical field of stepping motors, in particular to a double-finger closed-loop stepping motor which comprises a stepping motor body, a finger seat, two clamping fingers, two rotating parts and a pressing assembly, the stepping motor body comprises a rotating shaft, a sliding part and a front end cover, the rotating shaft is rotationally installed on the front end cover and is in threaded connection with the sliding part, the sliding part is provided with a cylindrical pin, and the cylindrical pin is in threaded connection with the finger seat. The finger seat is connected with the front end cover, the finger seat is provided with a containing cavity and two sliding grooves, the sliding grooves are communicated with the containing cavity, the sliding part slides in the axial direction of the containing cavity, the two clamping fingers are arranged in the sliding grooves in a sliding mode, the clamping fingers are provided with inserting holes, the two rotating parts are rotationally installed in the containing cavity, one ends of the rotating parts are rotationally connected with the cylindrical pin, and the other ends of the rotating parts stretch into the inserting holes. The pressing assembly is movably arranged on the finger seat and abuts against the two clamping fingers, the pressing assembly is provided with an impressing face, after the motor is powered on, the two clamping fingers are driven to move in the face-to-face or back-to-back mode, the pressing assembly is driven to be away from or close to the front end cover, and the advantages that an object can be clamped, and a mark can be printed on the object are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stepping motor, more particularly to a double-finger closed-loop stepping motor. BACKGROUND

[0002] Stepping motor is a kind of electromotor which converts electric pulse signal into corresponding angular displacement or linear displacement, and the rotor rotates an angle or moves forward one step for each input pulse signal. Closed-loop stepping motor is a kind of stepping motor which is provided with an optical or magnetic encoder on the body of the stepping motor, and the encoder receives a signal when the rotor rotates an angle, and compares with the external controller to adjust the rotating angle of the rotor. Double-finger stepping motor is a kind of stepping motor which converts the rotating output of the stepping motor into the mutual action between two clamping fingers.

[0003] Patent document (CN218976496U) discloses a two-finger stepping motor, which comprises a screw block structure, two swing members and two sliding members. When the screw in the screw block structure rotates and drives the sliding block to move axially, the two swing members swing and drive the two sliding members to move towards or away from each other and clamp the object. The two-finger stepping motor is a kind of application of stepping motor all-in-one machine which realizes clamping or releasing of the object by integrating the sliding members on the stepping motor. However, when the customer needs to print the factory code on the object, how to realize the above function by using the stepping motor all-in-one machine is still a market blank.

[0004] Therefore, there is a demand for a double-finger closed-loop stepping motor which can clamp the object and print the mark on it. SUMMARY

[0005] The application aims to provide a double-finger closed-loop stepping motor, which comprises a stepping motor body, a finger seat, two clamping fingers, two rotating members and a pressing assembly. The stepping motor body comprises a rotor assembly, a sliding member and an end cover assembly. The end cover assembly comprises a front end cover. The rotor assembly comprises a rotating shaft, which is rotatably installed on the end cover assembly and has a threaded end penetrating through the front end cover. The threaded end of the rotating shaft is threadedly connected with the sliding member. The sliding member has a cylindrical pin at one end. The finger seat is fixedly connected with the front end cover. The finger seat has a receiving cavity and two sliding grooves. The bottom wall of each sliding groove has a through hole, which is in communication with the sliding groove and the receiving cavity. The sliding member is slidably arranged in the receiving cavity along the axial direction of the receiving cavity. The two clamping fingers are slidably arranged in the corresponding sliding grooves. Each clamping finger has an insertion hole at one end close to the bottom wall of the sliding groove. The two rotating members are symmetrically arranged and rotatably installed in the receiving cavity. One end of each rotating member is rotatably connected with the cylindrical pin. The other end of each rotating member penetrates through the through hole and extends into the corresponding insertion hole. The pressing assembly is movably arranged on the finger seat along the axial direction of the finger seat. The pressing assembly is located between and abuts against the two clamping fingers. One end of the pressing assembly away from the sliding groove has a pressing surface. When the rotating shaft rotates and drives the sliding member to reciprocally move along the axial direction of the stepping motor body, the two rotating members swing towards or away from each other, drive the two clamping fingers to move towards or away from each other, and drive the pressing assembly to move away from or close to the front end cover, thereby achieving the advantages of clamping objects and marking.

[0006] Another purpose of the application is to provide a double-finger closed-loop stepping motor, wherein one end of each clamping finger away from the other clamping finger has a first guide surface, which is an inclined surface or an arc surface. The two sides of the pressing assembly abut against the two first guide surfaces of the two clamping fingers, thereby driving the pressing assembly to press when the clamping fingers move towards each other.

[0007] In order to achieve the above-mentioned at least one purpose, the application provides a double-finger closed-loop stepping motor, which comprises:

[0008] a stepping motor body, which comprises a rotor assembly, a sliding member and an end cover assembly. The end cover assembly comprises a front end cover. The rotor assembly comprises a rotating shaft, which is rotatably installed on the end cover assembly and has a threaded end penetrating through the front end cover. The threaded end of the rotating shaft is threadedly connected with the sliding member. The sliding member has a cylindrical pin at one end; and

[0009] a finger seat, the finger seat is fixedly connected with the front end cover, the finger seat has a receiving cavity and two sliding grooves, the bottom wall of each sliding groove has a through hole, the two ends of the through hole are communicated with the sliding groove and the receiving cavity respectively, the sliding member is arranged in the receiving cavity and slides along the axial direction of the receiving cavity; and

[0010] two clamping fingers, the two clamping fingers are arranged in the corresponding sliding grooves and slide in the sliding grooves, one end of each clamping finger near the bottom wall of the sliding groove has an insertion hole; and

[0011] two rotating members, the two rotating members are arranged symmetrically, and the two rotating members are rotatably arranged in the receiving cavity, one end of each rotating member is rotatably connected with the cylindrical pin, the other end of each rotating member penetrates through the through hole and extends into the corresponding insertion hole; and

[0012] a pressing assembly, the pressing assembly is arranged on the finger seat and moves along the axial direction of the finger seat, the pressing assembly is located between the two clamping fingers and abuts against the two clamping fingers, one end of the pressing assembly away from the sliding groove has a pressing surface, when the rotating shaft rotates and drives the sliding member to reciprocate along the axial direction of the stepping motor body, the two rotating members swing towards or away from each other, drive the two clamping fingers to move towards or away from each other, and drive the pressing assembly to move away from or close to the front end cover.

[0013] In one or more embodiments of the present application, the stepping motor body further comprises a stator assembly, the end cover assembly further comprises a rear end cover, the stator assembly is located between the front end cover and the rear end cover, the stator assembly comprises a coil, the rotor assembly is located on the inner side of the stator assembly, the side wall of the sliding member further has a plurality of guide portions, the side wall of the receiving cavity has a plurality of guide grooves, and each guide groove extends into a guide portion.

[0014] In one or more embodiments of the present application, one end of each clamping finger away from the other clamping finger has a first guide surface, the first guide surface is an inclined surface or an arc surface, and the two sides of the pressing assembly abut against the two first guide surfaces of the two clamping fingers respectively.

[0015] In one or more embodiments of the present application, the double-finger closed-loop stepping motor further comprises a resilient member, the finger seat further has a mounting groove, the pressing assembly comprises a lifting member, a guide member and a pressing member, one end of the guide member near the front end cover has an outer edge portion, the guide member is arranged on the finger seat and slides, the two ends of the resilient member abut against the bottom wall of the mounting groove and the outer edge portion respectively, the lifting member is detachably connected with the guide member, the pressing member is detachably connected with one end of the lifting member away from the guide member, and the two sides of the lifting member abut against the first guide surfaces on the two clamping fingers respectively.

[0016] In one or more embodiments of the present application, each of the clamping fingers has a plurality of connecting holes.

[0017] In one or more embodiments of the present application, the double-finger closed-loop stepping motor further comprises a plurality of profiling members, each of the connecting holes being detachably mounted with a profiling member.

[0018] In one or more embodiments of the present application, the double-finger closed-loop stepping motor further comprises an encoder body, the encoder body being fixedly connected to the rear end cover away from the front end cover.

[0019] In one or more embodiments of the present application, the encoder body comprises a housing and a code disc, the housing having a recess, one end of the housing with the recess being fixedly connected to the rear end cover, the rotating shaft being sequentially inserted through the recess and the housing away from the sliding member and extending a predetermined distance, the code disc being located in the recess and fixedly mounted on the rotating shaft for rotation, and the end of the rotating shaft away from the clamping fingers having a manual screwing portion.

[0020] In the embodiments of the present application, the double-finger closed-loop stepping motor comprises a stepping motor body, a finger seat, two clamping fingers, two rotating members, and a pressing assembly. The stepping motor body comprises a rotating shaft, a sliding member, and a front end cover. The rotating shaft is rotationally mounted on the front end cover. One end of the rotating shaft is threadedly connected to the sliding member. The sliding member has a cylindrical pin. The finger seat is fixedly connected to the front end cover. The finger seat has a receiving cavity and two sliding grooves. The sliding grooves are in communication with the receiving cavity. The sliding member slides along the axial direction of the receiving cavity. The two clamping fingers are slidingly arranged in the sliding grooves. Each clamping finger has an insertion hole at one end close to the bottom wall of the sliding groove. The two rotating members are symmetrically arranged and rotationally mounted in the receiving cavity. One end of each rotating member is rotationally connected to the cylindrical pin. The other end of each rotating member passes through the through hole and extends into the corresponding insertion hole. The pressing assembly is movably arranged on the finger seat along the axial direction of the finger seat. The pressing assembly is located between and abuts against the two clamping fingers. The end of the pressing assembly away from the sliding grooves has a pressure marking surface. When the rotating shaft rotates and drives the sliding member to reciprocally move along the axial direction of the stepping motor body, the two rotating members swing towards or away from each other, and drive the two clamping fingers to move towards or away from each other, and drive the pressing assembly to move away from or close to the front end cover, thereby achieving the advantages of clamping objects and marking. BRIEF DESCRIPTION OF DRAWINGS

[0021] These and / or other aspects and advantages of the present application will become more apparent and more readily appreciated from the following detailed description of the embodiments of the present application, taken in conjunction with the accompanying drawings in which:

[0022] Figure 1 FIG. 1 illustrates a structural schematic diagram of a double-finger closed-loop stepping motor according to an embodiment of the present application. DETAILED DESCRIPTION

[0023] The terms and words used in the following description and claims are not limited to the bibliographical meanings, but are only used to enable a clear and consistent understanding of the application. Accordingly, it should be apparent to those skilled in the art that the following description of various embodiments of the present application are provided for illustration purpose only and not for the purpose of limiting the application as defined by the appended claims and their equivalents.

[0024] It is understood that the term "one" should be interpreted as "at least one" or "one or more" to mean that a quantity of an element can be one in some embodiments, and a quantity of the element can be more than one in other embodiments. The term "one" is not limited to mean a quantity of one.

[0025] Although ordinal numbers such as "first", "second", or the like will be used to describe various components, the components are not limited by the ordinal numbers. The ordinal numbers are used merely to distinguish a component from another. For example, a first component can be termed as a second component, and likewise, a second component can be termed as a first component without departing from the teaching of the present inventive concept. The term "and / or" used herein includes any and all combinations of one or more associated listed items.

[0026] The terms used herein are merely used to describe various embodiments and are not intended to limit the application. As used herein, the singular form is intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and / or "has," when used in this specification, specify the presence of stated features, numbers, steps, operations, components, elements, or a combination thereof, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, elements, or groups thereof.

[0027] Exemplary dual-finger closed-loop stepper motor, refer to Figure 1 Exemplary dual-finger closed-loop stepper motor, refer to

[0028] Specifically, the stepper motor body 10 comprises a rotor assembly, a sliding piece 101 and an end cover assembly, the end cover assembly comprises a front end cover 1021, the rotor assembly comprises a rotating shaft 103, the rotating shaft 103 is rotatably installed on the end cover assembly through a bearing, and one end of the rotating shaft 103 penetrates through the front end cover 1021 and is threaded, and the threaded end of the rotating shaft 103 is screwed with the sliding piece 101, and one end of the sliding piece 101 is provided with a cylindrical pin 1011; in addition, the finger seat 20 is fixedly connected with the front end cover 1021, the finger seat 20 is provided with a containing cavity 201 and two sliding grooves 202, the bottom wall of each sliding groove 202 is provided with a through hole 2021, the two ends of the through hole 2021 respectively communicate with the sliding groove 202 and the containing cavity 201, and the sliding piece 101 is slidingly arranged in the containing cavity 201 along the axial direction of the containing cavity 201; in addition, the two clamping fingers 30 are slidingly arranged in the corresponding sliding grooves 202, and one end of each clamping finger 30 close to the bottom wall of the sliding groove 202 is provided with an insertion hole 301; in addition, the two rotating pieces 40 are symmetrically arranged, and the two rotating pieces 40 are rotatably installed in the containing cavity 201, one end of each rotating piece 40 is rotatably connected with the cylindrical pin 1011, and the other end of each rotating piece 40 penetrates through the through hole 2021 and extends into the corresponding insertion hole 301.

[0029] It should be noted that when the rotating shaft 103 rotates circumferentially, since the sliding piece 101 only moves along the axial direction of the containing cavity 201, and the rotating shaft 103 is screwed with the sliding piece 101, the rotating shaft 103 and the sliding piece 101 can be regarded as a screw sliding block structure, and the sliding piece 101 reciprocally moves along the central axis of the rotating shaft 103 at this time, when the sliding piece 101 slides, the two rotating pieces 40 are driven to swing towards each other or away from each other through the cylindrical pin 1011, and the other end of the rotating piece 40 in turn drives the two clamping fingers 30 to move towards each other or away from each other, so that the clamping or loosening of the object to be printed is realized, and when the two clamping fingers 30 clamp the object to be printed, the pressing assembly 50 is also facilitated to print marks on the surface of the object to be printed.

[0030] It should be further noted that in the present application, the two rotating pieces 40 are L-shaped as a whole, the middle segment of the rotating piece 40 is rotatably installed on the finger seat 20, one end of the rotating piece 40 away from the insertion hole 301 is provided with a notch groove 401, the cylindrical pin 1011 extends into the two notch grooves 401, so that the rotating piece 40 is rotatably connected with the cylindrical pin 1011, and the other end of the rotating piece 40 is provided with a spherical surface (not marked in the figure), and the spherical surface is in abutment with the hole wall of the insertion hole 301.

[0031] In addition, the pressing assembly 50 is arranged on the finger seat 20 and moves along the axial direction of the finger seat 20, the pressing assembly 50 is located between the two clamping fingers 30 and abuts against the two clamping fingers 30, and one end of the pressing assembly 50 away from the sliding groove 202 is provided with a pressing surface (not shown in the figure).

[0032] It should be noted that when the sliding piece 101 reciprocates along the axial direction of the stepping motor body 10, the two rotating pieces 40 swing towards or away from each other, and drive the two clamping fingers 30 to move towards or away from each other, and drive the pressing assembly 50 to move away from or close to the front end cover 1021, when the two finger seats 20 are very close and almost clamp the object to be printed, the pressing surface abuts against the surface of the object to be printed, when the two finger seats 20 clamp the object to be printed, the pressing surface further moves in the direction of the surface of the object to be printed, and exerts a pressure on the surface of the object to be printed to print marks on the surface of the object to be printed. It is easy to see that compared with the prior art, the present application has the advantages of clamping the object and printing marks.

[0033] Further, in order to realize the rotation of the rotating shaft 103 and the sliding of the sliding piece 101 along the axial direction of the stepping motor body 10, the stepping motor body 10 further comprises a stator assembly, the end cover assembly further comprises a rear end cover 1022, the stator assembly is located between the front end cover 1021 and the rear end cover 1022, the stator assembly comprises a coil 104, the rotor assembly is located on the inner side of the stator assembly, the side wall of the sliding piece 101 is provided with a plurality of guide portions (not shown in the figure), the guide portions extend outwardly from the side wall of the sliding piece 101 and form protrusions, the side wall of the accommodating cavity 201 is provided with a plurality of guide grooves 2011, and each guide groove 2011 extends into the guide portion.

[0034] Further, in order to realize the rotation of the rotating shaft 103 and the sliding of the sliding piece 101 along the axial direction of the stepping motor body 10, the stepping motor body 10 further comprises a stator assembly, the end cover assembly further comprises a rear end cover 1022, the stator assembly is located between the front end cover 1021 and the rear end cover 1022, the stator assembly comprises a coil 104, the rotor assembly is located on the inner side of the stator assembly, the side wall of the sliding piece 101 is provided with a plurality of guide portions (not shown in the figure), the guide portions extend outwardly from the side wall of the sliding piece 101 and form protrusions, the side wall of the accommodating cavity 201 is provided with a plurality of guide grooves 2011, and each guide groove 2011 extends into the guide portion.

[0035] Further, in order to reset the pressing assembly 50, the double-finger closed loop stepping motor further comprises a resilient member 504, the finger seat 20 further has a mounting slot (not shown in the figure), the pressing assembly 50 comprises a lifting member 501, a guide member 502 and a stamping member 503, the guide member 502 has an outer edge portion 5021 at one end close to the front end cover 1021, the guide member 502 is slidingly arranged on the finger seat 20, the two ends of the resilient member 504 are respectively abutted against the bottom wall of the mounting slot and the outer edge portion 5021, the lifting member 501 is detachably connected with the guide member 502, the stamping member 503 is detachably connected with one end of the lifting member 501 away from the guide member 502, the two sides of the lifting member 501 are respectively abutted against the first guide surface 302 on the two clamping fingers 30, and the stamping surface is arranged on the side of the stamping member 503 away from the lifting member 501.

[0036] It should be noted that, by arranging the lifting member 501 and the guide member 502 to be detachable, when the pressing assembly 50 is not needed to mark, the lifting member 501 can be detached, so that the double-finger closed loop stepping motor only has the function of clamping or loosening the object.

[0037] It should be noted that, by arranging the lifting member 501 and the guide member 502 to be detachable, when the pressing assembly 50 is not needed to mark, the lifting member 501 can be detached, so that the double-finger closed loop stepping motor only has the function of clamping or loosening the object.

[0038] It should be noted that, by arranging the connecting hole 303 and the profiling member 3031, the clamping applicability of the clamping finger 30 is improved, when clamping the object with a flat side surface, the profiling member 3031 is not arranged on the clamping finger 30, and when clamping a cylinder, the profiling member 3031 with the same arc surface is arranged on the clamping finger 30, so that the clamping finger 30 can clamp the object more firmly.

[0039] Further, the double-finger closed-loop stepping motor further comprises an encoder body 60, one end of the encoder body 60 is fixedly connected with the rear end cover 1022 away from the front end cover 1021, specifically, the encoder body 60 comprises a shell 601 and a code disc 602, the shell 601 has a recess (not labeled in the figure), one end of the shell 601 with the recess is fixedly connected with the rear end cover 1022, the rotating shaft 103 away from the sliding piece 101 has a predetermined distance and sequentially penetrates the recess and the shell 601, the code disc 602 is located in the recess and is fixedly installed on the rotating shaft 103 to follow the rotation, one end of the rotating shaft 103 away from the finger 30 has a manual screwing part 1031, it is to be noted that by arranging the encoder body 60, the closed-loop control of the double-finger closed-loop stepping motor is provided. Since the encoder body 60 is mature in technology and is widely used in the market, the specific structure and function of the encoder body 60 are not described here, the encoder body 60 includes but is not limited to the code disc 602 disclosed in the patent document (CN202268837U) and can implement high-precision feedback on whether the rotating shaft 103 is out of step, and then the software compares the detection result with the design value to realize automatic compensation. In addition, by arranging the manual screwing part 1031, when the coil 104 loses power, the operator can also manually rotate the rotating shaft 103.

[0040] In summary, the double-finger closed-loop stepping motor based on the embodiment of the present application is illustrated, which provides the advantages of clamping objects and marking for the double-finger closed-loop stepping motor.

[0041] It is worth mentioning that in the embodiment of the present application, the double-finger closed-loop stepping motor has simple structure, does not involve complex manufacturing process and expensive materials, and has high economy. At the same time, for the manufacturer, the double-finger closed-loop stepping motor provided by the present application is easy to produce and has low cost, which is more conducive to controlling the production cost and further conducive to product promotion and use.

[0042] Those skilled in the art should understand that the embodiments of the utility model shown in the above description and the drawings are only as examples and do not limit the utility model. The purpose of the utility model has been completely and effectively realized. The function and structural principle of the utility model have been shown and explained in the embodiments, and the implementation of the utility model can be any deformation or modification without departing from the principle.

Claims

1. A dual finger closed loop stepper motor characterized by: The double-finger closed-loop stepping motor comprises a stepping motor body, the stepping motor body comprising a rotor assembly, a sliding piece and an end cover assembly, the end cover assembly comprising a front end cover, the rotor assembly comprising a rotating shaft, the rotating shaft being rotatably installed on the end cover assembly and having a threaded end penetrating through the front end cover, and the threaded end of the rotating shaft being threadedly connected with the sliding piece, and one end of the sliding piece having a cylindrical pin; a finger seat, the finger seat being fixedly connected with the front end cover, the finger seat having a receiving cavity and two sliding grooves, the bottom wall of each sliding groove having a through hole, the two ends of the through hole being respectively communicated with the sliding groove and the receiving cavity, and the sliding piece being slidably arranged in the receiving cavity along the axial direction of the receiving cavity; two clamping fingers, the two clamping fingers being slidably arranged in the corresponding sliding grooves, and each clamping finger having an insertion hole at one end close to the bottom wall of the sliding groove; two rotating pieces, the two rotating pieces being symmetrically arranged, and each rotating piece being rotatably connected with the cylindrical pin at one end and penetrating through the through hole and extending into the corresponding insertion hole at the other end; and a pressing assembly, the pressing assembly being movably arranged on the finger seat along the axial direction of the finger seat, the pressing assembly being located between and abutting against the two clamping fingers, and the end of the pressing assembly away from the sliding groove having a pressing surface, when the rotating shaft rotates and drives the sliding piece to reciprocally move along the axial direction of the stepping motor body, the two rotating pieces swing towards or away from each other, and drive the two clamping fingers to move towards or away from each other, and drive the pressing assembly to move away from or close to the front end cover. The stepping motor body further comprises a stator assembly, the end cover assembly further comprising a rear end cover, the stator assembly being located between the front end cover and the rear end cover, the stator assembly comprising a coil, the rotor assembly being located on the inner side of the stator assembly, the side wall of the sliding piece further having a plurality of guide portions, and the side wall of the receiving cavity having a plurality of guide grooves, each guide groove extending into one guide portion. Each end of the two clamping fingers towards each other has a first guide surface, the first guide surface being an inclined surface or an arc surface, and the two sides of the pressing assembly being respectively abutted against the two first guide surfaces of the two clamping fingers. The double-finger closed-loop stepping motor further comprises an elastic piece, the finger seat further having a mounting groove, the pressing assembly comprising a lifting piece, a guide piece and a pressing piece, one end of the guide piece close to the front end cover having an outer edge portion, the guide piece being slidably arranged on the finger seat, the two ends of the elastic piece being respectively abutted against the bottom wall of the mounting groove and the outer edge portion, the lifting piece being detachably connected with the guide piece, the pressing piece being detachably connected with one end of the lifting piece away from the guide piece, and the two sides of the lifting piece being respectively abutted against the first guide surfaces on the two clamping fingers. Each clamping finger has a plurality of connecting holes.

2. The dual finger closed loop stepper motor of claim 1, wherein: ​ 3. The dual finger closed loop stepper motor of claim 1, wherein: ​ 4. The dual finger closed loop stepper motor of claim 3, wherein: ​ 5. The dual finger closed loop stepper motor of claim 1, wherein: ​ 6. The dual finger closed loop stepper motor of claim 5, wherein: The double-finger closed-loop stepping motor further comprises a plurality of profiling members, each of which is detachably installed in the connecting hole.

7. The dual finger closed loop stepper motor of claim 2, wherein: The double-finger closed-loop stepping motor further comprises an encoder body, which is fixedly connected to the rear end cover away from the front end cover.

8. The dual finger closed loop stepper motor of claim 7, wherein: The encoder body comprises a shell and a code disc, the shell has a cavity, one end of the shell with the cavity is fixedly connected to the rear end cover, the rotating shaft penetrates through the cavity and the shell in sequence away from the sliding member and extends out by a predetermined distance, the code disc is located in the cavity and is fixedly installed on the rotating shaft to follow the rotation, and the rotating shaft away from the clamping finger has a manual screwing part at the end.

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