CN211504172U

CN211504172U - Encoder

Info

Publication number: CN211504172U
Application number: CN202020252250.5U
Authority: CN
Inventors: 徐安宁; 钱裕平; 余剑飞
Original assignee: ZHEJIANG HECHUAN TECHNOLOGY CO LTD
Current assignee: ZHEJIANG HECHUAN TECHNOLOGY CO LTD
Priority date: 2020-03-04
Filing date: 2020-03-04
Publication date: 2020-09-15
Anticipated expiration: 2030-03-04

Abstract

The utility model discloses an encoder, include: the rear base penetrates through the center of the rear base and is connected with a motor shaft of the rear base through a bearing; one end of the rear base is provided with an inner concave structure, and the end part of the motor shaft penetrating through the rear base is positioned at the bottom of the inner concave structure; a magnet seat fixedly connected with the end part of the motor shaft is arranged in the concave structure, the magnet seat comprises a disc structure with a screw hole at the center, and an inner ring and a magnetic ring with the same axis as the screw hole center of the disc structure are arranged on the disc structure of the magnet seat; the inner side surface of the concave structure is provided with a step surface, the step surface is provided with an annular support, one end of the annular support, which is far away from the rear base, is provided with a circuit board, and the circuit board is provided with a magnetic induction chip. The magnetic code of encoder says for annular magnetic ring in this application to the center that will bear the magnet seat of magnetic ring sets up the screw hole, makes the magnet seat can follow the top installation of motor bearing, need not to fix from the side-mounting of motor shaft, has improved the convenience of magnet seat and magnetic ring integral erection.

Description

Encoder

Technical Field

The utility model relates to an encoder technical field especially relates to an encoder.

Background

The encoder is one of the most common important devices in various industrial productions, and is mainly used for measuring position information. The existing commonly used encoders have various types and different structural structures. The main points are that the code channel and the component for detecting the information on the code channel are different. For example, a magnetic encoder has a magnetic track and a magnetic sensor for detecting the rotational position of the magnetic track; the code channel of the photoelectric encoder is composed of one or more circles of gratings, and the current position is determined by detecting the position of the light-emitting element irradiated on the code channel.

In any encoder, simplifying the structure of the encoder and improving the production efficiency of the encoder are one of the problems studied by technicians in the industry.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an encoder simplifies the installation of encoder, improves the production efficiency of encoder.

In order to solve the above technical problem, the utility model provides an encoder, a serial communication port, include: the rear base penetrates through the rear base and is connected with a motor shaft of the rear base through a bearing; one end of the rear base is provided with an inner concave structure, and the end part of the motor shaft penetrating through the rear base is positioned at the bottom of the inner concave structure;

a magnet seat fixedly connected with the end part of the motor shaft is arranged in the concave structure, the magnet seat comprises a disc structure with a screw hole in the center, and an inner ring and a magnetic ring with the same shaft center as the screw hole of the disc structure are arranged on the disc structure of the magnet seat;

the side of indent structure is the step face, be provided with the ring carrier on the step face, the ring carrier deviates from the one end of step face is provided with the circuit board, be provided with the magnetic induction chip on the circuit board.

In an alternative embodiment of the present application, the magnet base is an aluminum base.

In an optional embodiment of the present application, an annular positioning plate is disposed between the annular support and the step surface of the concave structure;

the annular positioning sheet comprises a fixing hole and a positioning hole, wherein the fixing hole is used for fixing the annular positioning sheet and the step surface by a first screw; and a second screw between the annular support and the step surface penetrates through the positioning hole to fix the annular support and the step surface.

In an optional embodiment of the present application, an annular optical code disc is further disposed on the magnet base, and the annular optical code disc and the magnetic ring are concentrically disposed on a disk structure of the magnet base;

and the circuit board is also provided with an optical reading head and a light-emitting element.

In an optional embodiment of the present application, the magnet further comprises an annular oil baffle plate disposed between the magnet seat and the bottom of the concave structure.

In an alternative embodiment of the present application, the surface of the annular oil deflector facing the magnet holder is provided with at least one annular groove.

The utility model provides an encoder, include: the motor shaft penetrates through the center of the rear base and is fixedly connected with the rear base through a bearing, an inner concave structure is arranged at one end of the rear base, and the end part of the motor shaft penetrating through the rear base is positioned at the bottom of the inner concave structure; a magnet seat fixedly connected with the end part of the motor shaft is arranged in the concave structure, the magnet seat comprises a disc structure with a screw hole at the center, and an inner ring and a magnetic ring with the same axis as the screw hole center of the disc structure are arranged on the disc structure of the magnet seat; the inner side surface of the concave structure is provided with a step surface, the step surface is provided with an annular support, one end of the annular support, which is far away from the rear base, is provided with a circuit board, and the circuit board is provided with a magnetic induction chip.

The utility model provides a with the magnetic code of this encoder way by the magnetic ring structure of original disc type structure simplification to the ring type, and the center that will bear the magnet seat of magnetic ring sets up the screw hole, makes this screw hole of magnet seat accessible from the top installation of motor bearing, and need not to fix from the side-mounting of motor shaft, has improved the convenience of magnet seat and magnetic ring integral erection, is favorable to improving high magnetic encoder's production efficiency.

Drawings

In order to clearly illustrate the embodiments or technical solutions of the present invention, the drawings 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 only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of an exploded view of a prior art magnetic encoder;

fig. 2 is an exploded view of an encoder according to an embodiment of the present disclosure;

fig. 3 is a schematic diagram of another exploded structure of an encoder according to an embodiment of the present application;

fig. 4 is a top view of a rear base provided in an embodiment of the present application.

Detailed Description

In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, fig. 1 is an exploded view of a prior art magnetic encoder. As shown in fig. 1, the magnet holder 1 includes a disc structure 11 and a cylinder structure 12, the disc structure 11 is disposed on the top of the cylinder structure 12, the magnet 4 is disposed on the disc structure 11, and the magnet 4 is also circular. The side of the cylindrical structure 11 is provided with a screw hole, when the magnet base 1 and the motor shaft 2 are fixedly connected, the cylindrical structure 11 can be sleeved on the end of the motor shaft 2 and fixed with the motor shaft 2 through the screw hole on the side of the cylindrical structure 11. Because the end of the motor shaft 2 is located at the bottom of the concave structure 31 of the rear base 3, when the magnet base 1 and the motor shaft 2 are fixed, because the disc structure 11 of the magnet base 1 forms a shielding barrier for the cylinder structure 12, the fixing screws can only be installed from the through holes 32 on the side surface of the concave structure 31, so that the installation of the encoder is inconvenient.

Therefore, the structure of the encoder is improved in the present application, as shown in fig. 2, fig. 2 is an exploded structure schematic diagram of the encoder provided in the embodiment of the present application. The encoder may include:

the rear base 3, the motor shaft 2 which runs through the center of the rear base 3 and is connected with the rear base 3 through a bearing; one end of the rear base 3 is provided with an inner concave structure 31, and the end part of the motor shaft 2 penetrating through the rear base 3 is positioned at the bottom of the inner concave structure 31;

a magnet base 1 fixedly connected with the end part of the motor shaft 2 is arranged in the concave structure 31, the magnet base 1 comprises a disc structure 11 with a screw hole in the center, and a magnetic ring 5 with an inner ring coaxial with the screw hole center of the disc structure 11 is arranged on the disc structure 11 of the magnet base 1;

the inner side surface of the concave structure 31 is provided with a step surface 33, the step surface 33 is provided with an annular support 61, one end of the annular support 61 departing from the rear base 1 is provided with a circuit board 6, and the circuit board 6 is provided with a magnetic induction chip.

As shown in fig. 2, the end of the back base 3 of the encoder provided by the present application is provided with an indent structure 31, and the indent structure 31 is used for sequentially accommodating and arranging a back cover plate 21, a circuit board 6, an annular bracket 61, a magnetic ring 5 and a magnet base 1 from top to bottom, wherein the magnetic ring 5 is attached and fixed on the surface of the disc structure 11 of the magnet base 1, the edge annular bracket 61 of the circuit board 6 is fixedly connected, the annular bracket 61 is used for bearing the circuit board 6, the surface of the annular bracket 61 departing from the circuit board 6 is fixedly connected with the step surface 33 of the indent structure 31, the back cover plate 21 is fixedly connected with the top edge of the back base 2, the back cover plate 21 seals the upper end of the indent structure 31 on the back base 2 to form a closed cavity for accommodating the components such as the magnet base 1 and the circuit board 6, and the magnet base 1 can drive the magnetic ring 5 to, since the rear base 2 is coupled to the motor shaft 2 by a bearing, the rear base 2, the ring-shaped bracket 61 fixedly coupled to the rear base 2, the circuit board 6, and the rear cover 21 do not rotate. The circuit board 6 is provided with a magnetic induction chip for detecting the change of the magnetic field, so that the rotation angle of the motor shaft 2 can be measured.

For the present application, the overall structure of the encoder is not significantly different from that of the prior art, and the difference is mainly that the structure of the magnet holder 1 and the magnet ring 5 is different from that of the magnet holder 1 and the magnet 4 of the prior art. In the application, the magnetic ring used as the magnetic code track is of an annular structure, and meanwhile, a screw hole is arranged at the center of the disc structure 11 of the magnet base 1, so that the screw hole does not need to be arranged on the side wall of the cylinder structure 12; accordingly, the through hole for fixing the magnet holder 1 on the motor shaft 2 is also changed from the side surface to the top end surface. When the magnetic base is actually installed, the cylindrical structure 12 of the magnet base 1 can be sleeved on the motor shaft, the screw hole on the top end face of the motor shaft 2 is opposite to the screw hole on the disc structure 11 of the magnet base 1, and the two can be fixedly connected through screws. In addition, the magnet seat 1 and the magnet ring 5 can be bonded on the disc structure 11 of the magnet seat 1 through glue with better viscosity. Because the screw of reciprocal anchorage between magnet holder 1 and motor shaft 2 is locked into from the inner ring of magnetic ring 5 and the center of disc structure 11, consequently do not have the part that produces the sheltering from to the locking screw, and then make the installation between magnet holder 1 and the motor shaft 2 fixed more simple easy operation, be favorable to the promotion in the magnetic encoder efficiency.

Optionally, in another specific embodiment of the present application, the method may further include:

the magnet base 1 is an aluminum base.

In the conventional magnetic encoder, the magnet holder 1 is generally made of 45-gauge steel. However, considering that the fixing positions of the magnet holder 1 and the motor shaft 2 are changed from the original side multi-point fixing to the single-point center fixing, the magnetic ring 5 has a ring structure, that is, the gravity of the whole magnetic ring 5 and the magnet holder 1 is more concentrated at a position away from the rotation center. In actual operation, the magnet holder 1 and the magnet ring 5 need to rotate along with the motor shaft, and the centrifugal force generated by the rotation of the magnet ring 5 and the magnet holder 1 is larger due to the change of the structure of the magnet ring 5 and the fixing mode of the magnet holder 1 compared with the prior art, and the magnet holder 1 and the motor are fixed by the center of the disk structure 11 for fixing the magnet holder 1, and the fastening degree of the magnet holder 1 and the motor is reduced compared with the mode of fixing the magnet holder by the side surface of the cylindrical structure 12, which obviously reduces the stability of the encoder. Therefore, in this embodiment, in order to reduce the centrifugal force when the magnet base 1 and the magnet ring 5 integrally rotate, the material of the magnet base 1 is changed into a lighter aluminum base, so as to reduce the centrifugal force when the magnet base 1 and the magnet ring 5 rotate together, thereby ensuring the stability when the magnet base 1 and the magnet ring 5 rotate, and avoiding the situation that the magnet base 1 and the magnet ring 5 are loosened relative to the motor shaft 2.

Alternatively, as shown in fig. 3, fig. 3 is an exploded structural schematic diagram of another encoder provided in the embodiment of the present application. In another specific embodiment of the present application, the method may further include:

an annular positioning sheet 7 is arranged between the annular support 61 and the step surface 33 of the concave structure 31;

the annular positioning sheet 7 comprises a fixing hole and a positioning hole, wherein the fixing hole is used for locking the annular positioning sheet 7 and the step surface 33 by a first screw; and a second screw between the annular support 61 and the step surface 33 penetrates through the positioning hole to fixedly lock the annular support 61 and the step surface 33.

Specifically, as shown in fig. 2 and 3, for the circuit board 6 fixed on the rear base 2 by the annular bracket 61, after the assembly is completed, the relative zero point between the magnetic induction chip on the circuit board 6 and the magnetic ring 5 needs to be determined. No play can occur between the wiring board 6 and the rear base 2 during actual use, which would otherwise seriously affect the measurement accuracy of the encoder. The circuit board 6 is fixedly connected with the step surface 33 of the concave structure 31 through the annular bracket 61, and the step surface 33 is provided with a bolt hole. The length of the bolt holes in the step surface 33 for fixing the ring holder 61 and the step surface 33 in the circumferential direction of the step surface 33 is larger than the length of the bolt holes in the circumferential direction of the step surface 33, so that the mounting position of the ring holder 61 is adjusted when the ring holder 61 is mounted, that is, there is a possibility that the ring holder slides in the circumferential direction of the step surface 33 even after being fixed. For this purpose, the present application further provides an annular positioning tab 7 between the annular holder 61 and the step surface 33 of the female structure 31. The annular positioning plate 7 comprises a fixing hole and a positioning hole, when the annular positioning plate 7 is fixed on the step surface 33 through the fixing hole, the positioning hole just faces the bolt hole on the step surface 33 for fixing the annular support 61, and the size of the positioning hole along the circumferential direction of the step surface 33 is smaller than that of the bolt hole on the step surface 33 for fixing the annular support 61. And when annular support 61 fixed mounting, need run through the locating hole on the annular spacer and lock during the bolt, and then avoid annular spacer 7 after fixed mounting, take place rotary motion along the circumferencial direction, and then guaranteed the measurement accuracy of encoder.

Based on any of the above embodiments, in another specific embodiment of the present application, the method may further include:

the magnet seat 1 is also provided with an annular optical code disc 8, and the annular optical code disc 8 and the magnetic ring 5 are concentrically arranged on a disc structure 11 of the magnet seat 1;

the circuit board 6 is also provided with an optical reading head and a light-emitting element.

Based on the encoder structure of any of the above embodiments, an annular optical code disc 8 may be further disposed on the disc structure 11 of the magnet base 1, the annular optical code disc 8 is a track with reflective gratings, and the optical reading head and the light emitting element are disposed on the circuit board 6, so as to form an optomagnetic hybrid encoder.

And the encoder in this application can also only remain light reading head and light emitting component on circuit board 6 to only set up annular optical code dish 8 on magnet seat 1, and remove the magnetic induction chip on magnetic ring 5 and the circuit board 6, at this moment, the encoder changes photoelectric encoder again.

Therefore, the structure of the encoder provided by the application, whether the encoder is finally assembled into an optical encoder, a magnetic encoder or an optomagnetic hybrid encoder, is universal in basic structure, and only a part of components need to be properly deleted during assembly. When the encoder is manufactured, the mass production of the encoder parts can be realized to the greatest extent, the mold opening quantity of the encoder parts during production is reduced, and the production cost of the encoder is further reduced.

and an annular oil baffle plate 9 arranged between the magnet seat 1 and the bottom of the concave structure 31.

It should be noted that, because the annular optical code disc 8 needs to reflect light to the optical reading head, and the optical reading head reads position information through the strength of the reflection capability of the reflective grating and the non-reflective grating on the annular optical code disc 8 to light, once the grating on the annular optical code track 8 is polluted to cause the reflection capability of the reflective grating and the non-reflective grating to change, the position information decoded by the optical reading head reading light information will be deviated, and further the measurement accuracy is reduced.

Therefore, still further including setting up in this application magnet seat 1 with annular oil baffle piece 9 between the concave structure 31 bottom, it is that the magnet seat 1 sets up annular oil baffle piece 9 to press close to the position of concave structure 31 bottom promptly.

It should be noted that, as shown in fig. 4, fig. 4 is a top view of the rear base provided in the embodiment of the present application, in fig. 4, a plurality of layers of step surfaces are provided in the concave structure 31, and the step surface 33 on which the annular oil-blocking piece 9 is provided should be a lower step surface 33 relative to the step surface 33 on which the annular bracket 61 is fixed in the actual installation process, so that there is enough space in the concave structure 31 to accommodate the annular oil-blocking piece 9 and other components, so that the annular oil-blocking piece 9 can effectively block the ink in the motor shaft 2 from flowing onto the annular track 8 on the magnet holder 1.

Further, the surface of the annular oil baffle sheet, which faces the magnet seat, is provided with at least one annular groove.

Because the ink of the motor shaft 2 flows to the annular track 8 of the magnet base through the annular oil baffle 9, it is required to flow around the inner ring of the annular oil baffle 9 and flow to the annular track 8 from the outer edge of the annular oil baffle 9.

In this embodiment, the surface of the annular light oil blocking sheet 8 is provided with a plurality of rings of annular grooves, so that the resistance of ink flowing from the inner ring to the outer ring of the annular oil blocking sheet 9 is increased, the possibility of ink polluting the annular optical code channel 8 is reduced, and the accuracy of the photoelectric encoder is guaranteed.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include elements inherent in the list. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. In addition, parts of the above technical solutions provided in the embodiments of the present application, which are consistent with the implementation principles of corresponding technical solutions in the prior art, are not described in detail so as to avoid redundant description.

Claims

1. An encoder, comprising: the rear base penetrates through the rear base and is connected with a motor shaft of the rear base through a bearing; one end of the rear base is provided with an inner concave structure, and the end part of the motor shaft penetrating through the rear base is positioned at the bottom of the inner concave structure;

a magnet base fixedly connected with the end part of the motor shaft is arranged in the concave structure, the magnet base comprises a disc structure with a screw hole in the center, and an inner ring and a magnetic ring with the same shaft as the screw hole in the center of the disc structure are arranged on the disc structure of the magnet base;

the side of the concave structure is a step surface, an annular support is arranged on the step surface, the surface of the annular support, which deviates from the step surface, is provided with a circuit board, and the circuit board is provided with a magnetic induction chip.

2. The encoder of claim 1, wherein the magnet base is an aluminum base.

3. The encoder of claim 1, wherein an annular locating tab is disposed between the annular support and the stepped surface of the recessed structure;

4. The encoder as claimed in claim 1 or 2, wherein the magnet base is further provided with an annular optical code disc, and the annular optical code disc and the magnetic ring are concentrically arranged on the disc structure of the magnet base;

5. The encoder of claim 4, further comprising an annular oil dam disposed between the magnet holder and the bottom of the recessed structure.

6. The encoder as claimed in claim 5, wherein the surface of the annular oil deflector facing the magnet holder is provided with at least one annular groove.