CN214480156U

CN214480156U - Send a encoder structure and send a motor for motor

Info

Publication number: CN214480156U
Application number: CN202120616906.1U
Authority: CN
Inventors: 郑美波
Original assignee: Pml Motors Co ltd
Current assignee: Pml Motors Co ltd
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-10-22
Anticipated expiration: 2031-03-26

Abstract

The utility model relates to the technical field of motor structures, in particular to an encoder structure for a wire feeding motor and a wire feeding motor, which comprises a base, an encoder assembly and a protective cover which are sequentially arranged outside a rear end cover of the motor; the encoder assembly comprises a code disc seat fixedly connected with a motor shaft, a code disc fixed on the code disc seat, and a photoelectric element and a circuit board fixed on the base. The utility model provides an encoder structure mutually supports through the structure of base, encoder subassembly and protection casing, installs the encoder in the outside of motor rear end cap, not only makes simple structure compact, makes things convenient for the dismouting maintenance, and occupation space is little, makes it have good dustproof effect through the optimization of structure moreover, can provide stable accurate coding signal, is applicable to various application scenario.

Description

Send a encoder structure and send a motor for motor

Technical Field

The utility model relates to a technical field of motor structure, in particular to send an encoder structure and send a motor for motor.

Background

Electric motors are one of the most common prime movers in machining and in everyday life. In order to achieve high precision, some motors usually have an encoder connected to one end of the motor shaft to control the rotation angle of the motor. The encoder is a rotary sensor for converting rotary displacement into a series of digital pulse signals, and is assembled at one end of a motor rotating shaft, and can feed back a rotating signal of the motor to the controller, and the controller controls the rotation of the motor rotating shaft according to the fed-back rotating signal. If the encoder is installed in the motor, the encoder needs to be wholly disassembled out of the rear end cover of the motor after being damaged, so that the maintenance is very troublesome.

The motor with the external encoder is disclosed in the patent number CN210578141U with the publication date of 19.05.2020.A motor with the external encoder is provided with a rotor, a stator, a motor front end cover, a bearing, a motor rear end cover and an encoder, wherein the encoder is arranged on the outer side of the motor rear end cover, and a support is arranged at one end of the motor rear end cover and one end of the encoder; the right side of the encoder is provided with an encoder cover which is fixedly connected with the rear end cover of the motor; and a bearing cover is arranged outside the bearing on the right side of the rotor.

The motor of the patent adopts an external encoder, so that the signal is stable, and the motor is convenient to disassemble and maintain. But has the following disadvantages: install outside the motor casing, not only the structure is not compact, and the encoder needs other transmission structure to link to each other with the motor just can test the feedback to the motor, and the transmission progression is many, not only transmission efficiency is low, and because the existence of transmission error, transmission accuracy also has certain influence.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problems of large occupied space and low precision of the external encoder structure, the utility model provides an encoder structure for a wire feeding motor, which comprises a base, an encoder assembly and a protective cover which are sequentially arranged outside a rear end cover of the motor; the encoder assembly comprises a code disc seat fixedly connected with a motor shaft, a code disc fixed on the code disc seat, and a photoelectric element and a circuit board fixed on the base.

On the basis of the technical scheme, furthermore, a plurality of outer edge protruding parts used for installing the circuit board are arranged on the side wall of the base.

On the basis of the technical scheme, furthermore, the outer edge bulge part is also provided with a wiring groove for arranging a circuit board lead and a wiring hole for the circuit board lead to pass through.

On the basis of the technical scheme, furthermore, a slot is arranged on the side wall of the wiring hole of the base and is matched with the protective cover for insertion and embedding.

On the basis of the technical scheme, furthermore, the outer edge bulge part is also provided with a plurality of reinforcing ribs.

On the basis of the technical scheme, furthermore, a mounting hole for a motor shaft to pass through is formed in the middle of the base, and a felt ring matched with the motor shaft is embedded in the mounting hole.

On the basis of the technical scheme, furthermore, the middle part of the base is also provided with a pressing sheet for covering the felt ring.

On the basis of the technical scheme, the code disc seat is further provided with a stop ring, and the stop ring is matched with a shaft shoulder of the code disc seat to fixedly lock the code disc on the code disc seat.

On the basis of the technical scheme, a sealing element is further arranged between the protective cover and the base.

The utility model also provides a send a motor, adopt as above a send a motor encoder structure.

The utility model provides a pair of send encoder structure for silk motor compares with prior art, has following advantage: the structure through base, encoder subassembly and protection casing mutually supports, installs the encoder in the outside of motor rear end cap, not only makes things convenient for the dismouting maintenance, and simple structure is compact moreover, and occupation space is little, can provide the stable accurate coding signal, is applicable to various application occasions.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is an exploded perspective view of an encoder structure for a wire feeding motor according to the present invention;

FIG. 2 is an exploded side view of the encoder structure for the wire feeding motor of the present invention;

FIG. 3 is a perspective view of an encoder configuration for a unshielded wire feed motor;

FIG. 4 is a side view of an encoder configuration for a unshielded wire feeder motor;

FIG. 5 is a top view of an encoder structure for the wire feeding motor according to the present invention;

FIG. 6 is a cross-sectional view A-A of FIG. 5;

FIG. 7 is a perspective view of the base;

FIG. 8 is a top view of the base;

FIG. 9 is a side view of the base;

fig. 10 is a partial enlarged view of B in fig. 9.

Reference numerals:

100 base 200 encoder assembly 300 shield

210 code disc seat 220 code disc 230 photoelectric element

240 circuit board 110 outer edge projection 111 wiring slot

112 wiring hole 113 slot 114 reinforcing bar

120 mounting holes 121 felt ring 130 pressing sheet

211 stop ring 400 seal element 510 connection

310 groove 140 mounting groove 241 circuit board lead

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The utility model provides an encoder structure for a wire feeding motor, which comprises a base 100, an encoder component 200 and a protective cover 300 which are sequentially arranged outside a rear end cover of the motor; the encoder assembly 200 includes a code wheel base 210 fixedly connected to a motor shaft, a code wheel 220 fixed to the code wheel base 210, and a photoelectric element 230 and a circuit board 240 fixed to the base 100.

During specific implementation, as shown in fig. 1-6, send an encoder structure for motor to include base 100, encoder subassembly 200, the protection casing 300 that installs in proper order, wherein base 100 accessible threaded connection, draw-in groove buckle cooperation or pin joint realize with motor rear end cap's fixed, and on the same hand, protection casing 300 also can make things convenient for the dismouting maintenance of part through threaded connection, draw-in groove buckle cooperation or pin joint's mode and base 100 fixed connection. The protective cover 300 can be made of metal materials, can effectively shield static electricity and external interference, and ensures stable operation of electronic elements of an internal circuit board. The encoder assembly 200 comprises a code disc seat 210, a code disc 220, a photoelectric element 230 and a circuit board 240, wherein the code disc seat 210 is fixed with the end part of the motor shaft through a set screw, and the code disc 220 is fixed on the code disc seat 210 and can rotate along with the rotation of the motor shaft and the code disc seat 210; the photoelectric element 230 and the circuit board 240 are fixed on the base 100, and the photoelectric element 230 and the code wheel 220 can cooperate with each other, so that light emitted by the photoelectric element 230 can be received by the photoelectric element detector after passing through the code wheel 220.

The working principle is that when the code wheel 220 rotates along with the motor shaft, light emitted by the photoelectric element 230 penetrates through the code wheel 220 and gaps on gratings of the photoelectric element 230 to irradiate the photoelectric element detector, the photoelectric element 230 emits two groups of square wave electric signals with 90-degree phase difference, and the electric signals are processed by a conversion circuit on the circuit board 240 to obtain speed information of the measured rotating shaft. The coded disc 220 can adopt a high-precision metal coded disc, has better thermal stability and wider application working conditions, for example, a 480-wire high-resolution coded disc is adopted, and the coded disc can be compatible with other resolution coded discs such as 60 and 120; and the high-precision circuit board 240 and the photoelectric element 230 are matched, so that the accuracy and the stability of signal acquisition can be improved, the running stability of the encoder is ensured, and the fine control of the rotating speed is realized.

The utility model provides a send an encoder structure for motor to mutually support through the structure of base, encoder subassembly and protection casing, install the encoder in the outside of motor rear end cap, not only make things convenient for the dismouting maintenance, simple structure is compact moreover, and occupation space is little, can provide and stabilize accurately the coding signal, is applicable to various application scenarios.

Preferably, a plurality of outer protrusions 110 for mounting the circuit board 240 are disposed on the side wall of the base 100.

In specific implementation, as shown in fig. 7 to 10, a plurality of outer edge protrusions 110 for mounting the circuit board 240 are disposed on the side wall of the base 100, so that an accommodating space for mounting the encoder assembly 200 is formed between the base 100 and the circuit board 240. The top of the outer edge protrusion 110 is fixed to the circuit board 240 by a plurality of connectors 510, and the connectors 510 may be screws, snaps, or positioning pins. It is understood that the number of the connecting members 510 can be arbitrarily set according to actual requirements; and above connected mode also can make up wantonly, for example both adopt screw fixation also adopt buckle fixed, not only can play the fixed action but also can play the positioning action. The height of the rim protrusion 110 is determined by the engagement of the photocell 230 with the code wheel 220, i.e., the photocell 230 on the circuit board 240 and the code wheel 220 can be properly engaged and function when the circuit board 240 is mounted on top of the rim protrusion 110.

Preferably, the outer edge protrusion 110 further defines a wiring slot 111 for receiving the circuit board lead 241 and a wiring hole 112 for the circuit board lead 241 to pass through.

In specific implementation, as shown in fig. 7, the outer edge protrusion 110 is further provided with a wiring groove 111 and a wiring hole 112, so that the circuit can be conveniently arranged. The opening of the wiring groove 111 faces the direction of the circuit board 240, and the circuit board lead 241 is isolated from the encoder assembly 200 by utilizing the side wall of the wiring groove 111, so that on one hand, the problem that the circuit board lead 241 is contacted with the photoelectric element 230 due to bending can be prevented, the normal work of the encoder assembly 200 is ensured, and meanwhile, the scratch and the rubbing with the circuit board lead 241 are avoided in the rotation process of the code wheel 220; on the other hand, since the circuit board leads 241 are connected to the outside and may be a channel for dust to enter, the dust can be effectively prevented from entering the encoder assembly 200 by the isolation of the side walls of the wiring grooves 111, and the cleanness and light reflection effect of the code wheel 220 are ensured. It will be appreciated that the wire slots 111 and wire holes 112 can be of various shapes, but are sized and shaped to allow the circuit board leads 241 to pass through. Preferably, there are a plurality of wiring slots 111 and wiring holes 112, through which different circuit board leads 241 can pass.

Preferably, a slot 113 is disposed at a side wall of the wiring hole 112 of the base 100, and the slot 113 is inserted and embedded in cooperation with the protective cover 300.

In specific implementation, as shown in fig. 2, 9 and 10, since the wiring board leads 241 are connected to the outside, for convenience of installation, a groove 310 is formed at a position of the side wall of the protective cover 300 corresponding to the wiring hole 112, and a slot 113 is formed at a side wall of the wiring hole 112 of the base 100, as shown in fig. 10, the groove 310 is fitted into the slot 113. Not only make protection casing 300 and base 100 installation location accurate, dustproof effectual simultaneously. It should be understood that the groove 310 is not limited to the U shape in the present embodiment, and may have other shapes that do not prevent the board lead 241 from passing through when the protective cover 300 is installed.

Preferably, the outer rim protrusion 110 is further provided with a plurality of ribs 114.

In specific implementation, as shown in fig. 7 to 9, in order to further increase the strength of the outer edge protrusion 110, a plurality of ribs 114 are disposed at the bottom of the outer edge protrusion 110.

Preferably, the middle of the base 100 is provided with a mounting hole 120 for a motor shaft to pass through, and a felt ring 121 matched with the motor shaft is embedded in the mounting hole 120.

In specific implementation, the middle of the base 100 is provided with a mounting hole 120, and the diameter of the mounting hole 120 is larger than the inner diameter of the motor shaft, so that the felt ring 121 can be embedded into the mounting hole to play a role in dust prevention and heat insulation.

Preferably, a pressing sheet 130 for covering the felt loop 121 is further provided in the middle of the base 100.

In practical implementation, as shown in fig. 4 and 6, if the depth of the mounting hole 120 of the base 100 is not enough to embed the felt loop 121, a pressing piece 130 may be added in the middle of the base 100, and the pressing piece 130 covers the felt loop 121 in the base 100, so that the installation is more convenient. Preferably, as shown in fig. 4, the pressing plate 130, the felt ring 121 and the base 100 are fixed to the rear end cover of the motor by screws.

Preferably, the code wheel seat 210 is further provided with a stop ring 211, and the stop ring 211 is matched with a shaft shoulder of the code wheel seat 210 to fixedly lock the code wheel 220 on the code wheel seat 210.

In specific implementation, as shown in fig. 4 and 6, the code wheel seat 210 is provided with a stepped shaft shoulder, the mounting hole of the code wheel 220 is matched with the stepped shaft shoulder, and a stop ring 211 is further mounted on the code wheel seat 210 to limit the axial displacement of the code wheel 220.

Preferably, a sealing member 400 is provided between the shield 300 and the base 100.

In specific implementation, as shown in fig. 7 to 9, a mounting groove 140 is disposed at a joint of the base 100 and the protective cover 300, and the mounting groove 140 is used for mounting the sealing element 400, so that the sealing performance inside the encoder structure can be improved, and dust can be further prevented from entering the encoder structure. Preferably, the sealing element 400 may be an O-ring.

It should be noted that, in the present embodiment, the base 100 is described as being divided into a plurality of parts, and the parts of the base 100 are not necessarily separated, and the base 100 in the present embodiment may be integrally formed, or a plurality of parts may be combined by welding or bonding.

During concrete implementation, can use on sending a motor with the encoder structure of sending a motor to install on PML's two integral type worm gear feed mechanism that drive, its compact structure, occupation space is little, can use in some narrow and small occasions in space. The wire feeding motor adopting the encoder structure has high encoder precision and good working reliability, can realize accurate control on the rotating speed of the motor, and further obtains accurate and stable wire feeding speed.

It should be noted that the utility model provides a send an encoder structure for motor is not restricted to using at sending a motor, also can use on other motors that have the adoption encoder.

Although terms such as base, encoder assembly, shield, bezel, code wheel, optoelectronic element, circuit board lead, peripheral flange, wiring slot, wiring hole, slot, stiffener, mounting hole, felt ring, wafer, snap ring, sealing element, connector, recess, mounting slot, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a send an encoder structure for wire motor which characterized in that: the motor rear end cover comprises a base (100), an encoder assembly (200) and a protective cover (300) which are sequentially arranged on the outer side of the motor rear end cover; the encoder assembly (200) comprises a code disc seat (210) fixedly connected with a motor shaft, a code disc (220) fixed on the code disc seat (210), a photoelectric element (230) fixed on the base (100) and a circuit board (240).

2. An encoder structure for a wire feeder according to claim 1, wherein: the side wall of the base (100) is provided with a plurality of outer edge convex parts (110) used for installing the circuit board (240).

3. An encoder structure for a wire feeder according to claim 2, wherein: the outer edge bulge part (110) is also provided with a wiring groove (111) for arranging a circuit board lead (241) and a wiring hole (112) for the circuit board lead (241) to pass through.

4. An encoder structure for a wire feeder according to claim 3, wherein: a slot (113) is arranged on the side wall of the wiring hole (112) of the base (100), and the slot (113) is matched with the protective cover (300) for insertion and embedding.

5. An encoder structure for a wire feeder according to claim 2, wherein: the outer edge bulge part (110) is also provided with a plurality of reinforcing ribs (114).

6. An encoder structure for a wire feeder according to claim 1, wherein: the motor shaft mounting structure is characterized in that a mounting hole (120) for a motor shaft to pass through is formed in the middle of the base (100), and a felt ring (121) matched with the motor shaft is embedded into the mounting hole (120).

7. An encoder structure for a wire feeder according to claim 6, wherein: the middle part of the base (100) is also provided with a pressing sheet (130) for covering the felt ring (121).

8. An encoder structure for a wire feeder according to claim 1, wherein: the code disc seat (210) is further provided with a stop ring (211), and the stop ring (211) is matched with a shaft shoulder of the code disc seat (210) to fixedly lock the code disc (220) on the code disc seat (210).

9. An encoder structure for a wire feeder according to any one of claims 1-8, wherein: a sealing element (400) is arranged between the protective cover (300) and the base (100).

10. A wire feed motor characterized by: use of an encoder structure for a wire feeder according to any of claims 1-9.