CN212082411U

CN212082411U - Modular structure of optical incremental encoder

Info

Publication number: CN212082411U
Application number: CN202021091554.4U
Authority: CN
Inventors: 申文忠
Original assignee: Jiangsu Ruixinyuan Technology Co ltd
Current assignee: Jiangsu Ruixinyuan Technology Co ltd
Priority date: 2020-03-03
Filing date: 2020-06-12
Publication date: 2020-12-04
Anticipated expiration: 2030-06-12

Abstract

The utility model relates to a modular structure of an optical incremental encoder, which comprises a shell, a receiver component and a transmitter component; the middle part of the shell is a groove part, a first cavity for installing the receiver assembly in a clamping mode is arranged in the shell above the groove part, and a second cavity for installing the emitter assembly in a clamping mode is arranged in the shell below the groove part; the utility model adopts the integrated optical incremental encoder modular structure, integrates the traditional encoder structure into a small module, and the shell structure is formed at one time through a die, thereby greatly improving the assembly precision, ensuring the parallelism of the working surface, ensuring the consistency of the working clearance, ensuring the alignment of the optical center and the chip, ensuring the effective irradiation area of the light-emitting element to the photoelectric conversion chip, and effectively improving the quality of the original signal; the utility model discloses effectively simplify the production and processing of spare part, simplified assembly process, made things convenient for the purchase transportation, saved material and manual work.

Description

Modular structure of optical incremental encoder

Technical Field

The utility model belongs to the technical field of photoelectric signal detection module technique and specifically relates to an optics incremental encoder modular structure.

Background

The main working components of the optical incremental encoder are divided into a signal transmitting part and a signal receiving and processing part. The emitting part is a light source composed of a light emitting diode and a lens. The signal receiving and processing part is a circuit board with a chip, and light emitted by the light source passes through a bright and dark area of the moving grating and is identified and processed by the chip and the circuit board to be circuit signals for output. The optical incremental encoder has high requirement on the matching precision of the visible emitting part and the receiving processing part, and the processing precision of each part and the assembly process requirement of a product are also high. Because the installation operation is inconvenient among the prior art, there is each accumulative total error, leads to the optics incremental measurement accuracy after the assembly to receive very big influence, from this, the optics incremental encoder modular structure of the integrated form of this application design can be fine solve above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

The applicant aims at the defects in the prior art and provides a modular structure of an optical incremental encoder with a reasonable structure, wherein an emitting part and a receiving processing part are inserted and installed in a shell to form an integrated integral structure, so that the assembly efficiency and the measurement precision are greatly improved.

The utility model discloses the technical scheme who adopts as follows:

an optical incremental encoder modular structure comprising a housing, a receiver assembly and a transmitter assembly; the shell is of a C-shaped cover shell structure, the middle part of the shell is a groove part, a first cavity for installing the receiver assembly in a clamping mode is arranged in the shell above the groove part, and a second cavity for installing the transmitter assembly in the clamping mode is arranged in the shell below the groove part; the supporting parts are symmetrically arranged along the inner walls of the two side walls of the shell, the horizontal clapboard part is arranged between the two supporting parts positioned at the rear of the groove part, the supporting part positioned at the upper part of the horizontal clapboard part forms a guide step higher than the horizontal clapboard part, and the top surface of the shell is provided with a square hole; the first cavity is formed by the horizontal clapboard part, the guide step and the top surface of the shell in a surrounding way; a bottom plate is arranged on the bottom surface of the shell, and a guide groove is formed at the lower part of the supporting part; the second cavity is enclosed by a supporting part, a guide groove and a bottom plate which are positioned at the lower part of the horizontal clapboard part.

As a further improvement of the above technical solution:

the groove part is provided with a first groove surface and a second groove surface which are corresponding to each other up and down, and the height of the horizontal clapboard part is positioned between the first groove surface and the second groove surface.

The emitter component is inserted through the guide grooves on two sides of the second cavity, the head of the emitter component is provided with a first positioning step for limiting in the second cavity, and the second cavity is in transition fit with the emitter component

The emitter component is a component formed by packaging a lower lead frame with two pins and a light-emitting diode on which a die is fixed through a resin material, a spherical lens is arranged on one surface, which faces the light-emitting diode, and the top surface of the spherical lens is flush with the second groove surface.

The first positioning step is arranged on the lower lead frame; the optical center of the spherical lens is aligned with the light emitting center of the light emitting diode, and the light source center of the light emitting diode on the emitter assembly, the optical center of the spherical lens and the center of the chip on the receiver assembly are mounted collinearly and perpendicular to the mounting plane.

Two pins of the emitter component are connected with an external electric signal, one is a positive electrode, and the other is a negative electrode; the rear side of the bottom plate is provided with an abdicating notch for the pin to pass through.

The head of the receiver assembly is provided with a second positioning step, and the second positioning step is inserted into the first cavity through the guide steps on the two sides and used for limiting in the first cavity; the top surface of the receiver component is provided with a guide limiting buckle which is matched with the square hole at the top of the first cavity for limiting.

The receiver assembly is an upper lead frame with four or five pins and a component formed by encapsulating a chip on the upper lead frame by a resin material; the guide step and the guide limiting buckle are arranged on the upper lead frame, and the bottom surface of the upper lead frame is flush with the first groove surface.

The receiver assembly has four or five pins, four channels output AB signals, and five channels output ABZ signals.

The grating or the light band moves in the groove part between the transmitter assembly and the receiver assembly, the grating on the grating is used for carrying out through-resistance segmentation on the light to form an optical signal and the optical signal is received by the receiver assembly, the bottom of the shell is provided with a mounting positioning pin, and mounting platforms with holes are arranged on two sides of the shell through mounting accessories.

The utility model has the advantages as follows:

the utility model has the advantages of reasonable design, small size, low cost and high reliability, adopts an integrated optical incremental encoder modular structure, integrates the traditional encoder structure into a small module, and the shell structure is formed at one time through a die, thereby greatly improving the assembly precision, ensuring the parallelism of the working surface, ensuring the consistency of the working gap, ensuring the alignment of the optical center and the chip, ensuring the effective irradiation area of the light-emitting element to the photoelectric conversion chip, and effectively improving the quality of the original signal; the utility model discloses effectively simplify the production and processing of spare part, simplified assembly process, made things convenient for the purchase transportation, saved material and manual work.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is another view of fig. 1.

Fig. 3 is a schematic perspective view of the housing of the present invention.

Fig. 4 is an exploded view of the present invention.

Fig. 5 is a schematic structural view of the mounting platform with holes on the housing of the present invention.

Fig. 6 is another view of fig. 5.

Fig. 7 is a block diagram of the signal principle of the optical incremental encoder module according to the present invention.

Wherein: 1. a housing; 2. a receiver assembly; 3. a transmitter assembly; 4. a mounting table with holes; 21. a pin; 22. an upper lead frame; 23. a guide limit buckle; 24. a second positioning step; 32. a lower lead frame; 33. a spherical lens; 34. a first positioning step; 101. a second groove surface; 102. a first groove surface; 103. positioning pins; 104. mounting accessories; 105. a horizontal partition plate portion; 106. a guide step; 107. a square hole; 108. a support portion; 109. a base plate; 110. a abdication gap; 111. a side wall; 112. a guide groove.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1-4, the modular structure of the incremental optical encoder of the present embodiment includes a housing 1, a receiver assembly 2 and a transmitter assembly 3; the shell 1 is of a C-shaped cover shell structure, the middle part of the shell 1 is a groove part, a first cavity for installing the receiver assembly 2 in a clamping mode is arranged in the shell 1 above the groove part, and a second cavity for installing the emitter assembly 3 in a clamping mode is arranged in the shell 1 below the groove part; support parts 108 are symmetrically arranged along the inner walls of two side walls 111 of the shell 1, a horizontal clapboard part 105 is arranged between the two support parts 108 positioned at the rear part of the groove part, the support part 108 positioned at the upper part of the horizontal clapboard part 105 forms a guide step 106 higher than the horizontal clapboard part 105, and a square hole 107 is arranged on the top surface of the shell 1; the first cavity is enclosed by the horizontal partition part 105, the guide step 106 and the top surface of the shell 1; a bottom plate 109 is arranged at the bottom surface of the shell 1, and a guide groove 112 is formed at the lower part of the supporting part 108; the second chamber is defined by a support portion 108 located below the horizontal partition portion 105, a guide groove 112, and a bottom plate 109.

The groove portion has a first groove surface 102 and a second groove surface 101 corresponding to each other up and down, and the height of the horizontal barrier portion 105 is between the first groove surface 102 and the second groove surface 101.

The emitter component 3 is inserted through the guide grooves 112 on the two sides of the second cavity, the head of the emitter component 3 is provided with a first positioning step 34 for limiting in the second cavity, and the second cavity is in transition fit with the emitter component 3

The emitter assembly 3 is a component formed by encapsulating a lower lead frame 32 with two pins 21 and a light emitting diode die-bonded thereon by a resin material, a spherical lens 33 is arranged on a surface facing the light emitting diode, and the top surface of the spherical lens 33 is flush with the second groove surface 101.

The first positioning step 34 is provided on the lower lead frame 32; the optical center of the spherical lens 33 is aligned with the light emitting center of the light emitting diode, and the light source center of the light emitting diode on the emitter module 3, the optical center of the spherical lens 33 and the center of the chip on the receiver module 2 are mounted in line and perpendicular to the mounting plane.

Two pins 21 of the emitter assembly 3 are connected with external electrical signals, one is a positive electrode, and the other is a negative electrode; the rear side of the bottom plate 109 is provided with an abdicating notch 110 for the pin 21 to pass through.

The head of the receiver component 2 is provided with a second positioning step 24 which is inserted into the first cavity through the guide steps 106 at the two sides and used for limiting in the first cavity; the top surface of the receiver component 2 is provided with a guiding limit buckle 23 which is matched with the square hole 107 at the top of the first cavity for limiting.

The receiver assembly 2 is a component formed by encapsulating an upper lead frame 22 with four or five pins 21 and a chip die-bonded thereon with a resin material; the guide step 106 and the guide limit buckle 23 are arranged on the upper lead frame 22, and the bottom surface of the upper lead frame 22 is flush with the first groove surface 102.

The receiver assembly 2 has four or five pins 21, four channels outputting the AB signal and five channels outputting the ABZ signal.

As shown in fig. 5 and 6, the grating or light band moves in the groove portion between the transmitter module 3 and the receiver module 2, and the grating type thereon performs the passage resistance division of the light to form the optical signal and is received by the receiver module 2, the bottom of the housing 1 is provided with the mounting positioning pin 103, and the two sides are provided with the mounting stages 4 with holes through the mounting fittings 104.

The utility model discloses shell 1 adopts the mould integrated into one piece, and transmitter subassembly 3 and receiver subassembly 2 adopt the joint formula mounting means to assemble in shell 1, have greatly improved the assembly precision, have guaranteed the parallelism of working face, have guaranteed the uniformity of working clearance, have guaranteed the alignment in optical center and the chip, have guaranteed the light-emitting component to the effective irradiation area of photoelectric conversion chip, effectively improve the original signal quality; the production and processing of parts are effectively simplified, the assembly process is simplified, the purchase and the transportation are facilitated, and the materials and the labor are saved.

The utility model discloses in the use, combine together with a code wheel, convert rotary motion into a binary channels digit output. Plus a code strip that converts linear motion to a digital output. As shown in fig. 7, the emitter assembly 3 includes an LED light emitting diode as its light source.

The light is refracted into a parallel beam by a single spherical lens 33 located directly above the LED, opposite the transmitter assembly 3 is the receiver integrated circuit. The integrated circuit consists of groups of photodetectors and signal processing circuitry required to generate the digital waveforms. The code wheel/strip moves between the emitter and detector causing the light beam to be interrupted by the regular pattern of spaces and bars on the code wheel/strip. The photodiodes receiving these interruptions are arranged in a manner corresponding to the radius and the count density of the encoder wheel/encoder tape. The detectors are also spaced such that the light period on one pair of detectors corresponds to the dark period on an adjacent pair of detectors. The photodiode output is fed through a signal processing circuit. Two comparators receive these signals and produce the final outputs for channels a and B. Due to this integrated phase technique, the digital output of channel a is in quadrature (90 degrees out of phase) with channel B.

The above description is for the purpose of explanation and not limitation of the invention, which is defined in the claims, and any modifications may be made within the scope of the invention.

Claims

1. An optical incremental encoder modular structure, characterized by: comprises a shell (1), a receiver component (2) and a transmitter component (3);

the shell (1) is of a C-shaped cover shell structure, the middle part of the shell (1) is provided with a groove part, a first cavity for installing the receiver assembly (2) in a clamping mode is arranged in the shell (1) above the groove part, and a second cavity for installing the transmitter assembly (3) in a clamping mode is arranged in the shell (1) below the groove part;

supporting parts (108) are symmetrically arranged along the inner walls of two side walls (111) of the shell (1), a horizontal partition plate part (105) is arranged between the two supporting parts (108) positioned behind the groove part, a guide step (106) higher than the horizontal partition plate part (105) is formed on the supporting part (108) positioned at the upper part of the horizontal partition plate part (105), and a square hole (107) is formed in the top surface of the shell (1); the first cavity is enclosed by the horizontal partition plate part (105), the guide step (106) and the top surface of the shell (1);

a bottom plate (109) is arranged on the bottom surface of the shell (1), and a guide groove (112) is formed at the lower part of the supporting part (108); the second cavity is surrounded by a supporting part (108) positioned at the lower part of the horizontal clapboard part (105), a guide groove (112) and a bottom plate (109).

2. The modular structure of an optical incremental encoder as claimed in claim 1, wherein: the groove part is provided with a first groove surface (102) and a second groove surface (101) which correspond to each other up and down, and the height of the horizontal partition plate part (105) is positioned between the first groove surface (102) and the second groove surface (101).

3. The modular structure of an optical incremental encoder as claimed in claim 2, wherein: the emitter component (3) is inserted through guide grooves (112) on two sides of the second cavity, a first positioning step (34) is arranged at the head of the emitter component (3) and used for limiting in the second cavity, and the second cavity is in transition fit with the emitter component (3).

4. The modular structure of an optical incremental encoder as claimed in claim 3, wherein: the emitter component (3) is a component formed by packaging a lower lead frame (32) with two pins (21) and a light-emitting diode (LED) on the lower lead frame through a resin material, a spherical lens (33) is arranged on one surface, opposite to the LED, of the emitter component, and the top surface of the spherical lens (33) is flush with the second groove surface (101).

5. The modular structure of an optical incremental encoder as claimed in claim 4, wherein: the first positioning step (34) is arranged on the lower lead frame (32); the optical center of the spherical lens (33) is aligned with the light emitting center of the light emitting diode, the light source center of the light emitting diode on the emitter assembly (3), the optical center of the spherical lens (33) and the center of the chip on the receiver assembly (2) are mounted collinearly and perpendicular to the mounting plane.

6. The modular structure of an optical incremental encoder as claimed in claim 4, wherein: two pins (21) of the emitter component (3) are connected with an external electric signal, one is a positive electrode, and the other is a negative electrode; the rear side of the bottom plate (109) is provided with an abdicating notch (110) for the pin (21) to pass through.

7. The modular structure of an optical incremental encoder as claimed in claim 2, wherein: the head of the receiver component (2) is provided with a second positioning step (24), and the second positioning step is inserted into the first cavity through the guide steps (106) on the two sides and used for limiting in the first cavity; the top surface of receiver subassembly (2) is equipped with direction spacing buckle (23), and square hole (107) cooperation spacing with first cavity top.

8. The modular structure of an optical incremental encoder as claimed in claim 7, wherein: the receiver assembly (2) is an upper lead frame (22) with four or five pins (21) and a component formed by encapsulating a chip on the upper lead frame by a resin material; the guide step (106) and the guide limiting buckle (23) are arranged on the upper lead frame (22), and the bottom surface of the upper lead frame (22) is flush with the first groove surface (102).

9. The modular structure of an optical incremental encoder as recited in claim 8, wherein: the receiver assembly (2) has four or five pins (21), four channels output AB signals, and five channels output ABZ signals.

10. The modular structure of an optical incremental encoder as claimed in claim 1, wherein: the grating or the light band moves in a groove part between the transmitter assembly (3) and the receiver assembly (2), the grating on the grating is used for carrying out through resistance division on light to form an optical signal and the optical signal is received by the receiver assembly (2), the bottom of the shell (1) is provided with a mounting positioning pin (103), and mounting platforms (4) with holes are arranged on two sides of the shell through mounting accessories (104).