CN217032533U

CN217032533U - Encoder and motor

Info

Publication number: CN217032533U
Application number: CN202220734866.5U
Authority: CN
Inventors: 刘朝阳
Original assignee: Shenzhen Sunfar Electric Technologies Co ltd
Current assignee: Shenzhen Sunfar Electric Technologies Co ltd
Priority date: 2022-03-24
Filing date: 2022-03-24
Publication date: 2022-07-22
Anticipated expiration: 2032-03-24

Abstract

The utility model provides an encoder and a motor, wherein the encoder comprises a shielding box, an encoder base and a circuit board arranged on the encoder base, the encoder base comprises a main body part and a first flange part, the main body part is provided with a spigot, the first flange part is provided with a plurality of first mounting holes and a plurality of second mounting holes, and the first flange part is fixedly locked to the tail end of a main shell of the motor through bolts penetrating through the plurality of first mounting holes; the shielding box comprises a box main body and a second flange portion, the second flange portion is provided with a fixing hole matched with the second mounting hole, the shielding box is locked on the first flange portion of the encoder base through a bolt penetrating through the fixing hole and connected to the second mounting hole in a threaded mode, and the circuit board is covered in the box main body. The shielding box is locked on the encoder base through the bolt, so that the assembly and disassembly are convenient and quick, the maintenance difficulty can be greatly reduced, the working efficiency is improved, the shielding box does not need to be matched with the tail end of the main shell of the motor, the use limitation does not exist, the installation requirement of the encoder is reduced, and the high compatibility is realized.

Description

Encoder and motor

Technical Field

The embodiment of the utility model relates to the technical field of automation, in particular to an encoder and a motor.

Background

In recent years, servo motors have been gaining consistent acceptance in the market by virtue of their excellent performance. The position encoder plays an important role in feedback and control of the rotating speed and position of the motor as an important loop in closed-loop control of a servo motor system.

Along with the continuous improvement of the requirements of the market on the aspects of safety, precision, reliability and the like of the servo motor, the requirements of motor manufacturers on a servo motor encoder are also improved, and the encoder is required to provide signals of the rotating speed and the position of the servo motor and ensure the high precision and the high resolution of the signals. The motor position detection and feedback are completed by a motor position encoder, so that the excellent motor position encoder determines the performance of the motor in the aspects of energy conservation, high efficiency, accuracy, intercommunication and the like to a great extent.

At present, the existing encoder generally comprises a base, a shielding box and a circuit board arranged on the base, wherein the base is assembled on a rear end cover of a motor, the shielding box is assembled on the rear end cover of the motor in a viscose mode, and the shielding box covers the periphery of the base and the circuit board to play a role in shielding.

However, the shielding box is not convenient to assemble and disassemble by adopting a mode of adhesively fixing the shielding box to the rear end cover of the motor, so that the maintenance difficulty is greatly increased, and the working efficiency is influenced. Moreover, because the rear end covers of different motors are different, the shielding box can be installed only by being matched with the rear end cover of the motor, so that the use limitation exists, and the compatibility is poor.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a novel encoder and a motor aiming at the problems of unchanged assembly and disassembly, high maintenance difficulty, low working efficiency, use limit and poor compatibility of the shielding box of the existing encoder.

The technical scheme for solving the technical problem in the embodiment of the utility model is to provide an encoder, which comprises a shielding box, an encoder base and a circuit board, wherein the encoder base is used for being assembled to the tail end of a main shell of the motor, the circuit board is arranged on the encoder base, the encoder base comprises a main body part and a first flange part arranged on the side wall of the bottom end of the main body part, a spigot is arranged in the center of the main body part, the first flange part is provided with a plurality of first mounting holes and a plurality of second mounting holes, and is locked and fixed to the tail end of the main shell of the motor through bolts penetrating through the first mounting holes, and the spigot is coaxial with a motor shaft at the tail end of the main shell of the motor; the circuit board is positioned on one side of the seam allowance, which is back to the first flange part; the shielding box comprises a box body and a second flange part arranged at the outer edge of the opening of the box body, the second flange part is provided with a fixing hole matched with the second mounting hole, and the shielding box is locked and fixed on the first flange part of the encoder base through a bolt penetrating through the fixing hole and connected to the second mounting hole in a threaded mode, and the circuit board is covered in the box body.

Preferably, the encoder further comprises a magnet assembly for fitting on the shaft of the motor at the rear end of the motor main housing, and the magnet assembly is embedded in the notch when the encoder base is fitted to the rear end of the motor main housing.

Preferably, the box main body is cylindrical, the second flange portion is composed of three mounting lugs, the mounting lugs are evenly distributed along the periphery of the box main body, and when the shielding box is assembled to the encoder base, each mounting lug is located within the vertical projection range of the first flange portion.

Preferably, the shield case is integrally formed of a metal material by a sheet metal process, and at least one half of a main body portion of the encoder base is embedded in the case main body when the shield case is assembled to the encoder base.

Preferably, the first flange portion protrudes from the bottom surface of the main body portion, and when the encoder base is assembled to the tail end of the main housing of the motor, the bottom surface of the first flange portion is attached to the end surface of the tail end of the main housing of the motor, and a preset distance is arranged between the bottom surface of the main body portion and the end surface of the tail end of the main housing of the motor.

Preferably, the first flange part is composed of a plurality of fixing lugs arranged on the side wall of the bottom end of the main body part, the main body part is cylindrical, the fixing lugs are evenly distributed along the circumferential direction of the main body part, and each fixing lug is provided with a first mounting hole and a second mounting hole.

Preferably, the first flange part comprises three fixing lugs, the three fixing lugs are positioned in the same plane, and the outer side surfaces of the three fixing lugs are all arc surfaces;

the lateral surface of fixed ear all is located with the central line of tang is on the columniform side of axis, just columniform and the circular spacing groove looks adaptation of motor main casing body tail end, and the encoder base assembles when the motor main casing body tail end, three the lateral surface of fixed ear respectively with the laminating of the lateral wall of circular spacing groove meets.

Preferably, the encoder further includes an elastic protector made of an insulating material, fitted to the circuit board and mounted in the box main body, and pressed against a surface of the circuit board when the shield box is fitted to the encoder base.

Preferably, the opening of the main body is provided with a clearance groove corresponding to the plurality of first mounting holes, and when the main body is assembled to the encoder base, at least a part of the head of the bolt in each first mounting hole is embedded in the clearance groove.

The embodiment of the utility model also provides a motor, which comprises a motor shell and a rear end cover fixed at the tail end of the motor shell, and the motor also comprises the encoder, wherein the rear end cover is provided with a plurality of third mounting holes matched with the first mounting holes, and the encoder base is locked and fixed on the rear end cover through bolts penetrating through the first mounting holes and the third mounting holes.

The encoder and the motor provided by the embodiment of the utility model have the following beneficial effects: the second flange part is arranged on the outer edge of the opening of the shielding box, a plurality of fixing holes matched with the first mounting holes are formed in the second flange part, the shielding box can be fixedly locked on the first flange part of the encoder base through bolts penetrating through the fixing holes and the first mounting holes, the bolt locking and locking mode is convenient and rapid to disassemble and assemble, the maintenance difficulty can be greatly reduced, the working efficiency is improved, the shielding box is arranged on the first flange part of the encoder base and can play a role in shielding a circuit board, the tail end of the main motor shell can be assembled through the encoder base, the shielding box does not need to be matched with the tail end of the main motor shell, the mounting stability and reliability of the shielding box are guaranteed, the use limitation cannot exist, the mounting requirement of an encoder is reduced, and the problem of poor compatibility is solved.

Drawings

Fig. 1 is a schematic structural diagram of an encoder according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a lateral projection of an encoder according to an embodiment of the present invention;

fig. 3 is a schematic exploded structural diagram of an encoder according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

Fig. 1 is a schematic structural diagram of an encoder according to an embodiment of the present invention, where the encoder can be applied in the field of automation technology, especially in a servo system. As shown in fig. 2 and 3 in conjunction, the encoder in the present embodiment includes a shield case 1, an encoder base 3 for fitting to a rear end of a motor main body 2 (e.g., a rear end cover of the motor), and a circuit board 4 mounted on the encoder base 3, i.e., the circuit board 4 is fitted to the rear end of the motor main body 2 through the encoder base 3.

Specifically, the encoder base 3 includes a main body portion 31 and a first flange portion 32 disposed on a bottom side wall of the main body portion 31, a spigot 33 is disposed in the center of the main body portion 31, the first flange portion 32 is provided with a plurality of first mounting holes 34 and a plurality of second mounting holes 35, and is locked and fixed to the tail end of the motor main housing 2 through bolts penetrating through the plurality of first mounting holes 34, so that the encoder base 3 is fixed to the tail end of the motor main housing 2. Moreover, the circuit board 4 is located at one side of the seam allowance 33 back to the first flange part 32, and when the encoder base 3 is assembled to the tail end of the motor main casing 2, the seam allowance 33 is coaxial with the motor shaft at the tail end of the motor main casing 2, so that the circuit board 4 is perpendicular to the axial direction of the motor shaft, thereby ensuring the detection effect and improving the accuracy of the measured data. In practical applications, the circuit board 4 is preferably fixed to the encoder base 3 in a manner perpendicular to the axial direction of the seam allowance 33.

The shield case 1 of the present embodiment includes a case main body 11, and a second flange portion 12 provided at an outer edge of an opening of the case main body 11, the second flange portion 12 is provided with a fixing hole 13 (e.g., a through hole or a counter bore) adapted to the second mounting hole 35, and the shield case 1 is locked and fixed to the first flange portion 32 of the encoder base 3 by a bolt passing through the fixing hole 13 and screwed into the second mounting hole 35, and covers the circuit board 4 in the case main body 11, ensuring that the shield case 1 can effectively shield the circuit board 4. Because the first flange portion 32 is located at the bottom end side wall of the main body portion 31, when the shielding box 1 is assembled on the encoder base 3, the main body portion 31 is embedded in the shielding box 1, so that the circuit board 4 and the opening of the shielding box 1 are spaced by a large distance, and the shielding effect of the shielding box 1 on the circuit board 4 is better. In practical applications, at least one half of the main body portion 31 of the encoder base 3 is preferably embedded in the cartridge main body 11 when the shield case 1 is assembled to the encoder base 3.

Above-mentioned encoder sets up second flange portion 12 through the opening outer fringe at shielding box 1 to set up a plurality ofly and first mounting hole 34 looks adaptation fixed orifices 13 at second flange portion 12, shield box 1 accessible like this and pass the bolt locking of fixed orifices 13 and first mounting hole 34 and fix on encoder base 3's first flange portion 32, the mode easy dismounting of bolt lock solid is swift, can greatly reduced maintain the degree of difficulty, improves work efficiency.

And, because shielding box 1 is installed on the first flange portion 32 of encoder base 3 to can enough play the shielding effect to circuit board 4, accessible encoder base 3 assembles the 2 tail ends of the main casing body of motor again, and shielding box 1 need not the adaptation in the 2 tail ends of the main casing body of motor, has not only guaranteed shielding box 1's installation stability and reliability, still can not have the use restriction, has reduced the installation requirement of encoder, thereby has solved the poor problem of compatibility, enlarges application scope.

The encoder further comprises a magnet assembly 5 on the shaft of the motor for mounting to the rear end of the motor main housing 2, and the magnet assembly 5 is embedded in the spigot 33 when the encoder base 3 is mounted to the rear end of the motor main housing 2, so that the magnet assembly 5 corresponds to and forms a magnetic fit with the encoder chip provided on the circuit board 4. In practical application, the structural design of the magnet assembly 5 can be specifically determined according to practical situations; for example, the magnet assembly 5 includes a magnetic sheet and a mount through which the magnet is fixedly mounted on the motor shaft.

Above-mentioned box main part 11 is cylindricly to adaptation in encoder base 3's shape avoids taking great installation space and influences encoder base 3's installation, guarantees compatibility. Moreover, the second flange portion 12 is formed by three mounting lugs 121, the three mounting lugs 121 are uniformly distributed along the periphery of the box main body 11, and when the shielding box 1 is assembled to the encoder base 3, each mounting lug 121 is located within the vertical projection range of the first flange portion 32, so as to prevent the mounting lug 121 of the shielding box 1 from protruding out of the first flange portion 32 to affect the mounting and fixing of the encoder base 3 at the tail end of the motor main body 2.

Specifically, each mounting lug 121 preferably sets up at least one fixed orifices 13, and each mounting lug 121 all can wear to locate the bolt locking of fixed orifices 13 to the first flange portion 32 of encoder base 3 through one like this, and because three mounting lug 121 evenly distributed to can effectively firmly lock shielding box 1 on encoder base 3, guarantee shielding box 1's installation stability and reliability. In particular, each mounting lug 121 is preferably provided with a fixing hole 13, and the fixing hole 13 is located in the center of the mounting lug 121, so that each mounting lug 121 can be firmly locked, and the difficulty in assembly and disassembly caused by the excessive number of fixing holes 13 can be prevented.

Preferably, the shielding box 1 is integrally formed by a metal material through a sheet metal (preferably iron metal) process, so that the processing is convenient and fast, and the material price is low, thereby effectively reducing the manufacturing cost.

Above-mentioned first flange portion 32 outstanding in the bottom surface of main part 31, and when the encoder base 3 assembled the 2 tail ends of the main casing of motor body, the bottom surface of first flange portion 32 directly pasted with the terminal surface of the 2 tail ends of the main casing of motor body, and make the interval preset distance between the bottom surface of main part 31 and the terminal surface of the 2 tail ends of the main casing of motor body, be favorable to processing manufacturing like this, thereby guarantee the straightness that hangs down of the bottom surface of first flange portion 32 and tang 33, ensure that when the bottom surface of first flange portion 32 pasted in the 2 tail ends of the main casing of motor body, tang 33 can be coaxial with the motor shaft of the 2 tail ends of the main casing of motor body. In practical applications, the preset distance between the bottom surface of the main body 31 and the end surface of the tail end of the motor main housing 2 may be determined according to practical situations, for example, 2mm, 3mm, or 4mm, so as to prevent the bottom surface of the main body 31 from abutting against the end surface of the tail end of the motor main housing 2, which may cause the bottom surface of the first flange 32 to be unable to reliably abut against the end surface of the tail end of the motor main housing 2.

In an embodiment of the encoder base 3, the first flange portion 32 is formed by a plurality of fixing lugs 321 disposed on a bottom side wall of the main body portion 31, the main body portion 31 is cylindrical, the fixing lugs 321 are uniformly arranged along a circumferential direction of the main body portion 31, and each fixing lug 321 is provided with a first mounting hole 34 and a second mounting hole 35, so that each fixing lug 321 can be locked and fixed to the tail end of the motor main housing 2 through a bolt penetrating through the first mounting hole 34, and the encoder base 3 is mounted and fixed to the tail end of the motor main housing 2. In particular, the first flange portion 32 is divided into a plurality of mutually independent fixing lugs 321, that is, the bottom surface of the first flange portion 32 is discontinuous, which is beneficial to ensuring the flatness of the bottom surface of the first flange portion 32 during the processing and manufacturing of the encoder base 3, thereby reducing the processing difficulty and the processing cost.

Moreover, the second mounting holes 35 are arranged on each fixing lug 321, the utilization rate of the fixing lugs 321 is improved, the practicability is high, the fixing lugs 321 are enlarged (the second mounting holes 35 are convenient to process), the area of the bottom surface of each fixing lug 321 is increased, the contact area between the bottom surface of the first flange part 32 and the end surface of the tail end of the motor main shell 2 is increased, and the stability and the reliability of the contact between the bottom surface of the first flange part 32 and the end surface of the tail end of the motor main shell 2 are improved.

Specifically, the first flange portion 32 includes three fixing lugs 321, and the three fixing lugs 321 are located in the same plane and have outer side surfaces that are all arc surfaces. Thus, the three fixing lugs 321 of the first flange part 32 are adapted to the three mounting lugs 121 of the shielding box 1, and the three fixing lugs 321 of the first flange part 32 are uniformly distributed along the circumferential direction of the main body part 31, so that the stability and reliability of the attachment between the bottom surface of the first flange part 32 and the end surface of the tail end of the motor main shell 2 can be further improved.

The lateral surface of three fixed ear 321 all is located the columniform side that uses tang 33's central line as the axis, and columniform and the circular spacing groove 21 looks adaptation of the 2 tail ends of the main casing of motor body, and when the encoder base 3 assembles the 2 tail ends of the main casing of motor body, the lateral surface of three fixed ear 321 meets with the lateral wall laminating of circular spacing groove 21 respectively, thereby the spacing first flange portion 32 of the circular spacing groove 21 of accessible, in order to prevent the play of encoder base 3, improve the installation stability and the reliability of encoder base 3.

In particular, the encoder further includes an elastic protection member 6 made of an insulating material (e.g., sponge), the elastic protection member 6 is adapted to the circuit board 4 and mounted in the box main body 11, and when the shielding box 1 is mounted on the encoder base 3, the elastic protection member 6 is pressed against the surface of the circuit board 4, so that the encoder not only meets the safety requirements, but also has a shock-absorbing protection effect to protect the components mounted on the circuit board 4.

The opening of the main body 11 is provided with a clearance groove 111 corresponding to the plurality of first mounting holes 34, and when the main body 11 is assembled to the encoder base 3, at least a part of the head of the bolt in each first mounting hole 34 is embedded in the clearance groove 111, so as to prevent the head of the bolt installed in the first mounting hole 34 from being connected to the shield case 1, which results in the shield case 1 being unable to be fixed.

The embodiment of the utility model also provides a motor, which comprises a motor shell, a rear end cover fixed at the tail end of the motor shell and the encoder, wherein the rear end cover is provided with a plurality of third mounting holes matched with the first mounting holes 34, and the encoder base 3 is locked and fixed on the rear end cover through bolts penetrating through the first mounting holes 34 and the third mounting holes.

The motor further comprises a protective shell 7, the protective shell 7 is provided with a plurality of fourth mounting holes 71, the rear end cover is provided with a plurality of fifth mounting holes 22 matched with the fourth mounting holes 71, and the protective shell 7 is locked and fixed to the rear end cover through bolts penetrating through the fourth mounting holes 71 and the fifth mounting holes 22. One side of protective housing 7 towards the rear end cap is equipped with the protection chamber of adaptation in encoder, and when protective housing 7 assembled the rear end cap, encoder base 3 and shielding box 1 all were located the protection intracavity of protective housing 7.

While the utility model has been described with reference to specific preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined in the following claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An encoder is characterized by comprising a shielding box, an encoder base and a circuit board, wherein the encoder base is used for being assembled to the tail end of a main motor shell, the circuit board is arranged on the encoder base, the encoder base comprises a main body part and a first flange part arranged on the side wall of the bottom end of the main body part, a spigot is arranged in the center of the main body part, the first flange part is provided with a plurality of first mounting holes and a plurality of second mounting holes, and is locked and fixed to the tail end of the main motor shell through bolts penetrating through the first mounting holes, and the spigot is coaxial with a motor shaft at the tail end of the main motor shell; the circuit board is positioned on one side of the seam allowance, which is back to the first flange part; the shielding box comprises a box main body and a second flange part arranged on the outer edge of an opening of the box main body, the second flange part is provided with a fixing hole matched with the second mounting hole, the shielding box is locked and fixed on the first flange part of the encoder base through a bolt penetrating through the fixing hole and connected to the second mounting hole in a threaded mode, and the circuit board is covered in the box main body.

2. The encoder of claim 1, further comprising a magnet assembly for mounting on a motor shaft at the rear end of the motor main housing, and wherein the magnet assembly is inserted into the notch when the encoder base is mounted at the rear end of the motor main housing.

3. The encoder of claim 1, wherein the box main body is cylindrical, and the second flange portion is formed by three mounting lugs, the three mounting lugs are uniformly distributed along the outer periphery of the box main body, and each mounting lug is located within a vertical projection range of the first flange portion when the shield box is assembled to the encoder base.

4. The encoder according to claim 3, wherein the shield case is integrally formed from a metal material by a sheet metal process, and at least one half of a main body portion of the encoder base is embedded in the case main body when the shield case is fitted to the encoder base.

5. The encoder according to any one of claims 1 to 4, wherein the first flange portion protrudes from a bottom surface of the main body portion, and when the encoder base is assembled to the rear end of the motor main housing, the bottom surface of the first flange portion abuts against an end surface of the rear end of the motor main housing, and the bottom surface of the main body portion is spaced from the end surface of the rear end of the motor main housing by a predetermined distance.

6. The encoder according to claim 5, wherein the first flange portion is formed by a plurality of fixing lugs disposed on a bottom side wall of the main body portion, the main body portion is cylindrical, the plurality of fixing lugs are uniformly arranged along a circumferential direction of the main body portion, and each fixing lug is provided with a first mounting hole and a second mounting hole.

7. The encoder according to claim 6, wherein the first flange portion comprises three fixing lugs, the three fixing lugs are located in the same plane, and the outer side surfaces of the three fixing lugs are all arc surfaces;

the lateral surface of three fixed ear all is located and uses the central line of tang is on the columniform side of axis, just columniform and the circular spacing groove looks adaptation of motor main casing body tail end, and when the encoder base assembled motor main casing body tail end, three the lateral surface of fixed ear respectively with the lateral wall laminating of circular spacing groove meets.

8. The encoder according to any one of claims 1 to 4, further comprising an elastic protection member made of an insulating material, the elastic protection member being fitted to the circuit board and housed in the box main body, and being pressed against a surface of the circuit board when the shield box is fitted to the encoder base.

9. The encoder according to claim 1, wherein the opening of the cartridge body is provided with a clearance groove corresponding to the plurality of first mounting holes, and at least a part of a head of a bolt in each of the first mounting holes is fitted into the clearance groove when the cartridge body is assembled to the encoder base.

10. An electric motor comprising a motor casing and a rear end cap fixed to the rear end of the motor casing, wherein the electric motor further comprises an encoder according to any one of claims 1 to 9, the rear end cap is provided with a plurality of third mounting holes matched with the first mounting holes, and the encoder base is locked and fixed to the rear end cap by bolts penetrating through the first mounting holes and the third mounting holes.