CN219223703U

CN219223703U - Reading head and shaft angle encoder

Info

Publication number: CN219223703U
Application number: CN202223576654.8U
Authority: CN
Inventors: 吕旸; 吴宏圣; 曹晶; 赵志会; 田彦福; 于超
Original assignee: Changchun Changguang Qiheng Sensing Technology Co ltd
Current assignee: Changchun Changguang Qiheng Sensing Technology Co ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2023-06-20
Anticipated expiration: 2032-12-30

Abstract

The application discloses a reading head and a shaft encoder, which are characterized by comprising a shell, wherein the shell comprises a cover plate, a bottom plate and side plates, and the cover plate, the bottom plate and the side plates jointly form a containing cavity; the circuit board assembly is arranged in the accommodating cavity of the shell and comprises a circuit board main body, a mirror seat mounting hole and a cable interface; the lens mount is arranged in the accommodating cavity of the shell and comprises a lens mount main body and a mounting shaft, the mounting shaft is matched with the lens mount mounting hole so that the lens mount main body is fixedly arranged on the circuit board main body, and a lens barrel is arranged on the lens mount main body and used for mounting a lens; the wire outlet connector is arranged on the shell and used for enabling a cable connected with the cable interface to pass through the shell. The lens base and the circuit board assembly form an integral assembly part, and the assembly part is integrally arranged in the shell of the reading head, so that the complexity of assembling the reading head is reduced, and the space of the accommodating cavity is fully utilized.

Description

Reading head and shaft angle encoder

Technical Field

The present application relates to shaft encoder, and more particularly, to a reading head of a shaft encoder and a shaft encoder having the same.

Background

The device used to compile, convert, and read, analyze, and store signals or data is called an encoder; the device comprises an axial angle encoder, a rotary main shaft of the axial angle encoder and a rotating shaft of a device to be measured, wherein the axial angle encoder is used for converting analog quantity of relative angular displacement of the rotating shaft into digital or image output through the encoder, and the rotary main shaft of the axial angle encoder is fixed with the rotating shaft of the device to be measured and synchronously moves; the encoder reading head is fixed on the device to be measured and keeps a relative static state with a fixed table of the device to be measured, then when a rotating shaft of the device to be measured rotates, the encoder reading head drives a rotating main shaft of the shaft angle encoder to synchronously rotate, the reading head reads rotating data of the rotating main shaft, and the acquisition of rotating angle information of the device to be measured is completed.

The reading head of the encoder is a device component which is key to ensuring angle measurement and analysis, and the reading head needs to work normally in environments with larger temperature difference, larger temperature and humidity difference, impact resistance and vibration resistance due to the specificity of the working environment of the reading head. If the encoder does not have good environmental compatibility and compensation, it will have a great impact on the measurement results.

The traditional encoder reading head has a complex internal structure, so that the processing precision of the encoder is difficult to improve, the heat dissipation of a circuit board is poor, and the focal length of a lens is difficult to adjust in the debugging process of the reading head; the middle sealing performance of the upper cover and the lower cover is poor, and the phenomena of water vapor entering and the like are easy to occur.

Disclosure of Invention

The present application provides, on the one hand, a readhead and, on the other hand, a shaft encoder having the readhead, which can be used to solve at least one of the above-mentioned problems.

In one aspect, the present application provides a read head comprising:

the shell comprises a cover plate, a bottom plate and side plates, wherein the cover plate, the bottom plate and the side plates jointly form a containing cavity;

the circuit board assembly is arranged in the accommodating cavity of the shell and comprises a circuit board main body, a lens seat mounting hole and a cable interface, wherein the circuit board main body is arranged in the shell, and the lens seat mounting hole and the cable interface are arranged on the circuit board main body;

the lens seat is arranged in the accommodating cavity of the shell and comprises a lens seat main body and a mounting shaft, the mounting shaft is arranged on the end face, close to the circuit board main body, of the lens seat main body and is matched with the lens seat mounting hole, so that the lens seat main body is fixedly arranged on the circuit board main body, and a lens barrel is arranged on the lens seat main body and used for mounting a lens;

the wire outlet connector is arranged on the shell and used for enabling a cable connected with the cable interface to pass through the shell.

According to some embodiments of the present application, the curb plate includes first curb plate, be equipped with the jackscrew hole on the first curb plate, and locate jackscrew in the jackscrew hole, be equipped with the fixed plate on the bottom plate, the fixed plate is located first curb plate with between the mirror base main part, works as the jackscrew precesses behind the jackscrew hole with the fixed plate butt, and promote the fixed plate butt the mirror base main part.

According to some embodiments of the application, the upper end of the fixing plate is provided with a trapezoid chamfer.

According to some embodiments of the application, the side plate further comprises a second side plate, the second side plate is opposite to the first side plate, the second side plate is provided with a through hole, and the outlet connector penetrates through the through hole and then is connected with the second side plate.

According to some embodiments of the present application, the outlet connector includes a head portion, a tail portion, and a boss, the boss is located between the head portion and the tail portion, the head portion passes through the through hole and then is located in the accommodating cavity, and the boss and the tail portion are stopped outside the accommodating cavity.

According to some embodiments of the application, the head is sleeved with a sealing ring at a position close to the boss.

According to some embodiments of the present application, the base plate is provided with a relief hole, and the relief hole corresponds to the lens barrel, so as to be used as a reading window of the lens barrel.

According to some embodiments of the present application, the base plate is further provided with a mounting groove, which is used for mounting a lens cover plate, and the yielding hole corresponds to the middle position of the lens cover plate; and/or the number of the groups of groups,

the lens cover plate is adhered to the mounting groove, and the cover plate is adhered to the side plate.

According to some embodiments of the present application, a gap is reserved between an end surface of the lens base main body far away from the circuit board main body and the bottom plate, and the gap is used for adjusting a focal length of the lens.

Another aspect of the present application provides a shaft encoder comprising a read head as in any of the previous embodiments.

One embodiment of the above application has at least the following advantages or benefits:

the lens base and the circuit board assembly form an integrated assembly part, and the assembly part is integrally arranged in the shell of the reading head, so that the complexity of assembling the reading head is reduced;

through fixed plate and jackscrew for the assembly part that mirror seat and circuit board subassembly formed is more stable installs in the casing, has improved the shock resistance of photoelectricity assembly part.

Drawings

Fig. 1 is a schematic diagram of the reader head according to the embodiment of the present application in a disassembled state.

Fig. 2 shows a schematic view of a top view of the reader head housing 1 according to an embodiment of the present application.

Fig. 3 is a schematic view showing the structure of the bottom plate of the reading head housing according to the embodiment of the present application.

Fig. 4 is a schematic view of a fixed board circuit board assembly according to an embodiment of the present application.

Fig. 5 is a schematic view of a lens holder according to an embodiment of the present application.

Wherein reference numerals are as follows:

1. the lens comprises a shell, 11, a cover plate, 12, a bottom plate, 121, a yielding hole, 122, a mounting groove, 123, a yielding groove, 124, a lens cover plate, 13, a first side plate, 131, a jackscrew hole, 132, jackscrews, 14, a second side plate, 141, a through hole, 142, an abutting table, 15, a third side plate, 16, a fourth side plate, 17, a fixing plate, 18, a mounting plate, 2, a circuit board assembly, 21, a circuit board main body, 22, a lens base mounting hole, 23, a cable interface, 3, a lens base, 31, a lens base main body, 32, a mounting shaft, 33, a lens barrel, 4, a wire outlet connector, 41, a head, 42, a tail, 43, a boss, 5 and a cable.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.

Example 1

The embodiment provides a reading head, as shown in fig. 1, fig. 1 is a schematic diagram of the reading head in the embodiment 5 of the application, in which each component is disassembled, and the reading head in the embodiment of the application includes a housing

The device comprises a body 1, a circuit board assembly 2, a mirror base 3 and an outgoing line connector 4.

It will be understood that the terms "comprising," "including," and "having," and any variations thereof, as used in the embodiments herein, are intended to cover non-exclusive inclusions. For example comprising a series of steps or a single

The process, method, system, article, or apparatus that comprises a step or element is not limited to the list of steps or elements 0 but may, alternatively, include steps or elements not listed or may, alternatively, include steps or elements not listed for such steps or elements

Other steps or components inherent to the process, method, article, or apparatus.

Referring to fig. 1, a housing 1 includes a cover plate 11, a bottom plate 12, and side plates, wherein the cover plate 11, the bottom plate 12, and the side plates together form a receiving cavity; the circuit board assembly 2 is arranged in the accommodating cavity of the shell 1

In the interior, the circuit board assembly 2 comprises a circuit board main body 21, a lens mount mounting hole 22 and cable interfaces 23 and 5, wherein the circuit board main body 21 is mounted in the shell 1, and the lens mount mounting hole 22 and the cable interfaces 23 are respectively arranged

Is provided on the circuit board main body 21; the lens holder 3 is disposed in the accommodating cavity of the housing 1 and comprises a lens holder main body 31 and a mounting shaft 32, wherein the mounting shaft 32 is disposed on the end face of the lens holder main body 31 close to the circuit board main body 21, and the mounting shaft 32 is matched with the lens holder mounting hole 22 to fix the lens holder main body 31

On the circuit board main body 21, a lens barrel 33 is arranged on the lens base main body 31 for installing a lens, and the axis of the lens barrel 0 is perpendicular to the end face of the lens base main body 31; the outlet connector 4 is arranged on the shell 1 for supplying

The cable 5 connected to the cable interface 23 passes out of the housing 1.

In this embodiment, the lens holder 3 and the circuit board are simultaneously disposed in the accommodating cavity of the housing 1 of the reading head, so that the space inside the housing 1 of the reading head is utilized to the maximum.

Preferably, after the lens holder mounting hole 22 is connected with the mounting shaft 32, glue (may be epoxy glue) is injected on the upper side of the circuit board main body 215, that is, away from the end surface of the lens holder 3, and the glue injection point is the connection position between the mounting shaft 32 of the lens holder 3 and the lens holder mounting hole 22, so as to ensure the connection stability of the lens holder main body 31 and the circuit board main body 21.

Excellent (excellent)

Preferably, be provided with the mounting panel 18 that is used for installing circuit board main part 21 on the inside lateral wall of casing 1, mounting panel 18 specifically can be located the lateral wall of first lateral plate 13, circuit board main part 21 can produce the heat at operating condition power-on operation, circuit board main part 21 overheated can reduce the reading head performance, circuit board main part 21 is fixed on mounting panel 18, has increased the area of contact of circuit board main part 21 and metal casing, improves radiating efficiency through the mode of heat conduction, and then promotes the job stabilization nature of circuit board main part 21, guarantees encoder reading head and reads, the analytic data ability.

The casing 1 is further provided with a vertical plate (not shown in the figure) for positioning the accessory formed by the circuit board main body 21 and the mirror base main body 31, the stability of the printed circuit board main body 21 and the mirror base main body 31 is ensured, the actual processing is also provided with a glue injection process, and the gap between the circuit board main body 21 and the cover plate 11 and the side plate of the casing 1 is filled at a specific point.

Preferably, the shell 1 is formed by die casting an aluminum alloy, and then surface treatment is performed, so that the mechanical property of the shell 1 is improved, and meanwhile, the corrosion resistance and oxidation resistance of the surface are also improved.

With continued reference to fig. 1, the side plate includes a first side plate 13, a top thread hole 131 is formed in the first side plate 13, and a top thread 132 is disposed in the top thread hole 131, the top thread hole 131 is in threaded engagement with the top thread 132, a fixing plate 17 is disposed on the bottom plate 12, a side surface of the fixing plate 17 is parallel to the first side plate 13, the fixing plate 17 is located between the first side plate 13 and the lens holder main body 31, and when the top thread 132 is screwed into the top thread hole 131, the fixing plate 17 abuts against the fixing plate 17 and pushes the fixing plate 17 to abut against the lens holder main body 31.

After the position of the lens holder 3 is adjusted, the jackscrew 132 is screwed into the accommodating cavity of the shell 1 from the jackscrew hole 131, the fixing plate 17 is extruded, the fixing plate 17 is deformed to abut against the lens holder main body 31, and the lens holder main body 31 and the circuit board main body 21 fixedly connected with the lens holder main body 31 are clamped in the shell 1, so that the stability of the lens holder 3 and the circuit board assembly 2 in the reading head is ensured.

The heat conducting silica gel can be arranged on the surface of the circuit board, so that the adaptability of the electric heating environment in the shell 1 can be improved, and the performance of the reading head under the full-load or overload working condition is optimized.

Further, the upper end of the fixed plate 17 is provided with a trapezoid chamfer, in particular an isosceles trapezoid chamfer, compared with the conventional rectangular structural design, the stress concentration at the bottom of the fixed plate 17 is reduced, the strength of the fixed plate 17 is increased by 25% on the basis of the prior art on the basis of unchanged overall volume, and the stability of the reading head is enhanced.

Further, the side plates further include a second side plate 14, the second side plate 14 is disposed opposite to the first side plate 13, specifically, the first side plate 13 is disposed at one end of the cover plate 11 and the bottom plate 12 and between the cover plate 11 and the bottom plate 12, the second side plate 14 is disposed at the other end of the cover plate 11 and the bottom plate 12 and between the cover plate 11 and the bottom plate 12, the second side plate 14 is provided with a through hole 141, and the outlet connector 4 is disposed in the through hole 141 in a penetrating manner.

It will be appreciated that the side panels further comprise a third side panel 15 and a fourth side panel 16, and that the cover panel 11, the bottom panel 12, and the first side panel 13, the second side panel 14, the third side panel 15, and the fourth side panel 16 form an approximately rectangular housing 1.

Further, the outlet connector 4 includes a head 41, a tail 42, and a boss 43, where the boss 43 is located between the head 41 and the tail 42, the vertical cross sections of the three are approximately circular, and the cross section of the boss 43 is larger than the diameters of the head 41 and the tail 42, the head 41 passes through the through hole 141 and is located in the accommodating cavity of the casing 1, and the boss 43 and the tail 42 are stopped outside the accommodating cavity.

The outlet connector 4 serves as a connecting workpiece of the cable 5 and the reading head, has a key effect, and guides the trend of the cable 5 inside and outside the shell 1 through the boss 43 of the outlet connector 4. In addition, the cable 5 extending to the outside of the casing 1 is generally compressed by the compressing device, so as to fix the wire harness, and when the cable harness is compressed, the position to be compressed can be accurately positioned by the wire outlet connector 4 through the boss 43, so that the non-uniformity caused by manually determining the compressing position of the wire harness is avoided.

Further, a sealing ring is sleeved at a position of the head 41 close to the boss 43, and after the head 41 passes through the through hole 141, the sealing ring abuts against the second side plate 14 to seal the through hole 141, so that the tightness of the housing 1 is improved.

Specifically, the sealing ring is sleeved at the position of the head 41 of the wire outlet connector 4, which is close to the boss 43, then the head 41 of the wire outlet connector 4 passes through the through hole 141 of the second side plate 14 of the shell 1, one end of the wire outlet connector 4 is connected to the wire outlet connector 23, the other end of the wire outlet connector 4 passes through the tail 42 after penetrating into the head 41 of the wire outlet connector 4, and the wire outlet connector 4 and the wire outlet 5 are compressed by the compressing device at a proper position, so that the wire outlet connector 4 and the wire outlet 5 are plastically deformed, and the wire outlet connector 4 and the wire outlet 5 are fixed together.

Preferably, an abutment 142 is further disposed above the second through hole 141, and when the cable 5 and the outlet connector 4 are compressed by using the compressing device, at least a portion of the compressing device is located on the abutment 142, so as to support the compressing device after the cable is compressed, and prevent the compressing device from excessively compressing the cable, thereby damaging the cable.

Further, the bottom plate 12 is provided with a relief hole 121, and the relief hole 121 corresponds to the lens barrel 33 and serves as a reading window of the lens arranged on the lens barrel 33.

Still further, the base plate 12 is further provided with a mounting groove 122 for mounting a lens cover plate 124, and the yielding hole 121 corresponds to the middle position of the lens cover plate 124.

The lens cover plate 124 and the mounting groove 122 are matched in structural dimension, gaps between the lens cover plate 124 and the mounting groove 122 are made up through a glue injection process, particularly, the mounting groove 122 is bonded with the cover plate 11 through anaerobic glue, and fault tolerance of the mounting of the lens cover plate 124 is improved.

The bottom plate 12 is further provided with a yielding groove 123, the yielding groove 123 is arranged around the yielding hole 121, and the lens cover plate 124 is arranged in the mounting groove 122, so that glue is extruded into the yielding groove 123, and the anti-pollution sealing performance and the dampproof and waterproof performance of the lens cover plate 124 are improved.

Preferably, the lens cover 124 is made of quartz glass, which is used for protecting the lens and improving the light transmittance.

Further, a gap is reserved between the end surface of the lens holder 3, which is far away from the circuit board main body 21, and the bottom plate 12, so as to adjust the focal length of the lens.

The lens is arranged in the lens barrel 33, and is matched with the threaded screw hole, the focusing function of camera equipment is similar to that of the lens in the lens barrel 33 by the feeding amount of the lens, and the focusing positions of different types of lenses possibly exceed the positioning surface of the lens holder 3 in the shell 1, so that a gap is reserved to prevent the interference between the lens and the bottom plate 12 of the shell 1, and the assembly adaptability of the shell 1 and the lens holders 3 with different specifications is improved.

The outer edge of the lens seat main body 31 and the reserved gap form contact constraint, so that the lens seat main body 31 can be stably fixed on the shell 1, contact heat dissipation can be formed, and the stability and reliability of the lens seat main body 31 under severe environments such as high temperature are improved.

The lens barrel 33 adopts a mode of bidirectional adjustment of the top and the bottom to debug the optimal focal length of lens imaging, the top adopts four-tooth rough adjustment, the bottom adopts twelve-tooth fine adjustment, the rough adjustment ensures the production efficiency, and the fine adjustment ensures the accuracy of data acquisition of the reading head.

The reading head of this embodiment has at least the following beneficial effects:

the lens base 3 and the circuit board assembly 2 form an integral assembly, and the assembly is integrally arranged in the shell 1 of the reading head, so that the complexity of assembling the reading head is reduced;

through fixed plate 17 and jackscrew 132 for the assembly part that mirror seat 3 and circuit board subassembly 2 constitute is more stable install in casing 1, has improved the shock resistance of photoelectricity assembly part.

Example two

The embodiment provides a shaft angle encoder, which comprises the reading head and the rotating main shaft described in the first embodiment, wherein the rotating main shaft is matched with the reading head to detect a device to be detected, the rotating main shaft is fixedly connected with a rotating shaft of the device to be detected so as to synchronously rotate, and the reading head is fixedly connected with a fixed part of the device to be detected so as to acquire data of a rotating angle of the rotating main shaft and realize angle information detection.

The shaft encoder of the present embodiment has at least the following advantageous effects:

It is to be understood that the various embodiments/implementations provided herein may be combined with each other without conflict and are not illustrated herein.

In the embodiments of the present application, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more, unless expressly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the embodiments of the present application, it should be understood that the terms "upper," "lower," "left," "right," "front," "rear," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or units to be referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present application.

Claims

1. A readhead for a shaft encoder, comprising:

2. The reading head according to claim 1, wherein the side plate comprises a first side plate, a top thread hole is formed in the first side plate, a top thread is arranged in the top thread hole, a fixing plate is arranged on the bottom plate, the fixing plate is located between the first side plate and the lens base main body, and when the top thread is screwed into the top thread hole, the fixing plate abuts against the fixing plate, and the fixing plate is pushed to abut against the lens base main body.

3. The reading head of claim 2, wherein the upper end of the fixed plate is provided with a trapezoidal chamfer.

4. The reading head of claim 2, wherein the side plate further comprises a second side plate, the second side plate is opposite to the first side plate, the second side plate is provided with a through hole, and the outlet connector is connected to the second side plate after passing through the through hole.

5. The reading head of claim 4, wherein the outlet fitting comprises a head portion, a tail portion, and a boss, the boss being positioned between the head portion and the tail portion, the head portion passing through the through hole and being positioned within the receiving cavity, the boss and the tail portion being stopped outside the receiving cavity.

6. The reading head of claim 5, wherein the head is provided with a sealing ring adjacent to the boss.

7. The reading head according to claim 1, wherein the base plate is provided with a relief hole, and the relief hole corresponds to the lens barrel and serves as a reading window of the lens barrel.

8. The reading head according to claim 7, wherein the base plate is further provided with a mounting groove for mounting a lens cover plate, and the relief hole corresponds to the middle position of the lens cover plate;

and/or the number of the groups of groups,

9. The reading head according to claim 1, wherein a gap is reserved between an end surface of the lens holder main body far away from the circuit board main body and the bottom plate for adjusting a focal length of the lens.

10. A shaft encoder comprising a reading head according to any one of claims 1 to 9.