CN213179877U - Reading head for grating ruler - Google Patents
Reading head for grating ruler Download PDFInfo
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- CN213179877U CN213179877U CN202022626484.4U CN202022626484U CN213179877U CN 213179877 U CN213179877 U CN 213179877U CN 202022626484 U CN202022626484 U CN 202022626484U CN 213179877 U CN213179877 U CN 213179877U
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Abstract
The utility model relates to a reading head, concretely relates to reading head for grating chi. The positioning device comprises a pulley, positioning columns, a light-emitting plate, a receiving plate and an indicating grating, wherein the two positioning columns are fixedly arranged on the pulley at intervals, the receiving plate is fixedly arranged at one end of each positioning column and fixedly connected with the pulley, the light-emitting plate is fixedly arranged at the other end of each positioning column and electrically connected with the receiving plate through a wire, and the indicating grating is fixedly arranged on the pulley on one side of the light-emitting plate. The reading head has the advantages of high assembly precision and small frictional resistance, and the light-emitting plate and the receiving plate are fixed on the pulley through the positioning column, so that the distance between the light-emitting plate and the receiving plate can be ensured to meet the production requirement, and the assembly precision and the measurement precision are improved; in addition, the position that produces friction with grating scale grating easily on the coaster is equipped with a plurality of bearings to reduce frictional force, solved the low and big problem of frictional resistance of assembly precision that current reading head exists, satisfied industrial measurement needs.
Description
Technical Field
The utility model relates to a reading head, concretely relates to reading head for grating chi.
Background
A grating scale is a commonly used measuring device in a closed-loop servo system of a numerical control machine, and is also called as a grating scale displacement sensor, and is generally used for detecting linear displacement or angular displacement. The basic structure of the grating ruler is a pair of scale gratings and a reading head, when the reading head slides on the scale gratings, the light and shade alternate sinusoidal interference fringes are generated by utilizing the principle of light interference, and the reading head converts the fringes into an electric signal, namely corresponding displacement information can be converted.
Due to the structure, the reading head of the conventional grating ruler is often positioned by screws or welding, the assembly precision is low, and after a plurality of parts are installed, the superposed errors are further amplified, so that the distance between functional parts such as focusing and receiving on the reading head is difficult to accurately control, the measurement precision is low, and the assembly mode of the parts needs to be adjusted; on the other hand, the reading head can be moved to measure by sliding on the scale grating, and the bearing distribution on the reading head of the existing grating is unreasonable, so that the friction between the reading head and the scale grating is large, the use precision is reduced, and the scale grating is easily damaged, so that a new grating reading head is needed to solve the defects.
SUMMERY OF THE UTILITY MODEL
The technical defect that the assembly precision is low and frictional resistance is big in order to overcome above-mentioned current reading head existence, the utility model provides a reading head for grating chi that assembly precision is high and frictional resistance is little.
In order to solve the above problem, the utility model discloses realize according to following technical scheme:
a reading head for grating chi, including coaster, reference column, luminescent plate, dash receiver and instruction grating, its characterized in that: two positioning columns are fixedly arranged on the pulley at intervals, a receiving plate is fixedly arranged at one end of each positioning column and fixedly connected with the pulley, a light-emitting plate is fixedly arranged at the other end of each positioning column and electrically connected with the receiving plate through a wire, and an indicating grating is fixedly arranged on the pulley on one side of the light-emitting plate.
The tackle is a rectangular body, mounting flanges are symmetrically arranged at two ends of the tackle, first bearings are movably mounted on the mounting flanges respectively, second bearings are movably mounted on the lower portions of the mounting flanges respectively, and more than one third bearing is movably mounted at the bottom of the tackle.
One side of the pulley is provided with a fixed groove, more than one upper light-transmitting hole is arranged in the fixed groove at intervals, a lower light-transmitting hole and a zero-position hole are arranged in the fixed groove below the upper light-transmitting hole at intervals, two positioning holes are arranged on the pulley above the fixed groove at intervals, and a wire passing hole is arranged on the pulley between the positioning holes; an avoiding groove is formed in the other side of the pulley, and a connecting hole is formed in the pulley at the end of the avoiding groove.
The number of the upper light holes is 4.
The avoiding groove is a V-shaped groove.
The lighting panel on the interval be provided with more than one main light lamp, be provided with the reference lamp on the lighting panel of main light lamp below.
The number of the main light lamps is 4.
The receiving plate is provided with more than one main receiver at intervals, and the receiving plate below the main receivers is provided with reference receivers at intervals.
The main receiver and the reference receiver are photodetectors, and the number of the main receivers is 4.
Compared with the prior art, the beneficial effects of the utility model are that:
the reading head for the grating ruler has the advantages of high assembly precision and small frictional resistance, the light-emitting plate and the receiving plate are fixed on the pulley through the positioning column, and the size of the positioning column is easy to control, so that the space between the light-emitting plate and the receiving plate can be ensured to meet the production requirement, and the assembly precision and the measurement precision are improved; in addition, the position that produces friction with grating chi scale grating easily on the coaster is equipped with a plurality of bearings to become rolling friction with sliding friction, reduced the wearing and tearing of frictional force and scale grating, solved the low and big problem of frictional resistance of assembly precision that current reading head exists, satisfied industrial measurement needs.
Drawings
The following detailed description of embodiments of the invention is provided with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a schematic front view of the pulley of the present invention;
fig. 3 is a rear view of the pulley of the present invention;
fig. 4 is a schematic view of the light-emitting panel of the present invention;
fig. 5 is a schematic front view of the receiving plate of the present invention.
In the figure:
1. the main light source device comprises a pulley, 101, a mounting flange, 102, a first bearing, 103, a second bearing, 104, a third bearing, 105, a fixing groove, 106, an upper light transmission hole, 107, a lower light transmission hole, 108, a zero position hole, 109, a positioning hole, 110, a line passing hole, 111, an avoiding groove, 112, a connecting hole, 2, a positioning column, 3, a light emitting plate, 31, a main light lamp, 32, a reference light, 4, a receiving plate, 41, a main receiver, 42, a reference receiver, 5, an indicating grating, 6 and a lead.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.
As shown in fig. 1-5, a reading head for grating ruler, including coaster 1, reference column 2, luminescent plate 3, dash receiver 4 and indication grating 5, coaster 1 is the cuboid, coaster 1's both ends symmetry is provided with mounting flange 101, the last activity respectively of mounting flange 101 is equipped with first bearing 102, first bearing 102 is used for reducing the friction between coaster 1 and grating ruler's the scale grating upper portion, mounting flange 101's lower part activity respectively is equipped with second bearing 103, second bearing 103 is used for reducing the friction between grating ruler's scale grating top and the reading head, coaster 1's bottom activity is equipped with more than one third bearing 104, third bearing 104 is used for reducing the friction between coaster 1 and grating ruler's the grating lower part.
Further, a fixing groove 105 is formed in one side of the pulley 1, more than one upper light-transmitting hole 106 is formed in the fixing groove 105 at intervals, specifically, the number of the upper light-transmitting holes 106 is 4, lower light-transmitting holes 107 and zero-position holes 108 are formed in the fixing groove 105 below the upper light-transmitting holes 106 at intervals, two positioning holes 109 are formed in the pulley 1 above the fixing groove 105 at intervals, a wire passing hole 110 is formed in the pulley 1 between the positioning holes 109, and the wire passing hole 110 is used for enabling a wire 6 to pass through the pulley 1 so as to prevent the wire 6 from being damaged in the working process due to external leakage; the opposite side on coaster 1 is provided with dodges groove 111, and is concrete, dodge groove 111 be the V-arrangement groove, dodge groove 111 and be used for making the adapting unit on the grating chi have certain activity space, dodge and be provided with connecting hole 112 on coaster 1 of groove 111 end department, connecting hole 112 is used for assembling the adapting unit on the grating chi.
Two positioning columns 2 are fixedly arranged on the pulley 1 at intervals, the positioning columns 2 are inserted into the positioning holes 109, specifically, threaded holes are arranged at the two end heads of each positioning column 2, a receiving plate 4 is fixedly arranged at one end of each positioning column 2, the receiving plate 4 is fixedly connected with the pulley 1, more than one main receiver 41 is arranged on the receiving plate 4 at intervals, specifically, the number of the main receivers 41 is 4, reference receivers 42 are arranged on the receiving plate 4 below the main receivers 41 at intervals, specifically, the main receivers 41 and the reference receivers 42 are photodetectors (the model is FDS1010), the main receivers 41 and the reference receivers 42 are used for converting received moire fringes into photoelectric signals so as to be convenient for processing and transmitting the photoelectric signals to an upper computer, wherein the main receivers 41 are used for realizing subdivision and measurement functions in the width of one moire fringe, and 4 paths of acquired photoelectric signals are respectively sent to 2 differential amplifiers by the 4 main receivers 41, the differential amplifier outputs two paths of signals with the phase difference of pi/2, and then the two paths of signals are shaped into signals with the duty ratio of 1: 1, the moving direction of the grating ruler can be obtained by distinguishing and comparing the phase of the square wave, and the displacement and the speed of the grating ruler can be obtained by counting square wave pulses.
The other end of reference column 2 is equipped with light-emitting panel 3 admittedly, and light-emitting panel 3 is connected with the receiver panel 4 electricity through wire 6, and is concrete, and wire 6 passes pulley 1 through line hole 110 and electrically connects the light-emitting panel 3 and the receiver panel 4 of both sides, avoids exposing externally and receiving the damage, light-emitting panel 3 on the interval be provided with more than one main light 31, it is concrete, the quantity of main light 31 is 4, is provided with on the light-emitting panel 3 of main light 31 below and participates in light 32, main light 31 and reference light 32 are used for producing the required light of measurement, wherein, the light that main light 31 sent passes light trap 106 to the opposite side of pulley 1, is received by main receiver 41, and the light that reference light 32 sent passes light trap 107 to the opposite side of pulley 1, is received by referring to receiver 42. The pulley 1 on one side of the light-emitting plate 3 is fixedly provided with the indicating grating 5, the indicating grating 5 is clamped in the fixing groove 105 and fixed through glue, and the indicating grating 5 is used for being matched with a scale grating of a grating ruler, so that light emitted by the light-emitting plate 3 generates specific moire fringes, and displacement measurement work is facilitated.
The reading head for the grating ruler has the advantages of high assembly precision and small friction resistance, the light-emitting plate 3 and the receiving plate 4 are fixed on the pulley 1 through the positioning column 2, and the size of the positioning column 2 is easy to control, so that the distance between the light-emitting plate 3 and the receiving plate 4 can be ensured to meet the production requirement, and the assembly precision and the measurement precision are improved; in addition, the position that produces friction with grating chi scale grating easily on coaster 1 is equipped with a plurality of bearings to become rolling friction with sliding friction, reduced the wearing and tearing of frictional force and scale grating, solved the low and big problem of frictional resistance of assembly precision that current reading head exists, satisfied industrial measurement needs.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, so that any modification, equivalent change and modification made by the technical spirit of the present invention to the above embodiments do not depart from the technical solution of the present invention, and still fall within the scope of the technical solution of the present invention.
Claims (9)
1. The utility model provides a reading head for grating chi, includes coaster (1), reference column (2), luminescent plate (3), receiving plate (4) and instruction grating (5), its characterized in that: two positioning columns (2) are fixedly arranged on the pulley (1) at intervals, a receiving plate (4) is fixedly arranged at one end of each positioning column (2), the receiving plate (4) is fixedly connected with the pulley (1), a light-emitting plate (3) is fixedly arranged at the other end of each positioning column (2), the light-emitting plate (3) is electrically connected with the receiving plate (4) through a wire (6), and an indication grating (5) is fixedly arranged on the pulley (1) on one side of the light-emitting plate (3).
2. A reading head for a grating ruler according to claim 1, wherein: the pulley (1) is a rectangular body, mounting flanges (101) are symmetrically arranged at two ends of the pulley (1), first bearings (102) are movably mounted on the mounting flanges (101) respectively, second bearings (103) are movably mounted at the lower parts of the mounting flanges (101) respectively, and more than one third bearing (104) is movably mounted at the bottom of the pulley (1).
3. A reading head for a grating ruler according to claim 2, characterized in that: one side of the pulley (1) is provided with a fixed groove (105), more than one upper light-transmitting hole (106) is arranged in the fixed groove (105) at intervals, lower light-transmitting holes (107) and zero holes (108) are arranged in the fixed groove (105) below the upper light-transmitting hole (106) at intervals, two positioning holes (109) are arranged on the pulley (1) above the fixed groove (105) at intervals, and a wire passing hole (110) is arranged on the pulley (1) between the positioning holes (109); an avoiding groove (111) is formed in the other side of the pulley (1), and a connecting hole (112) is formed in the pulley (1) at the end of the avoiding groove (111).
4. A reading head for a grating ruler according to claim 3, wherein: the number of the upper light holes (106) is 4.
5. A reading head for a grating ruler according to claim 3, wherein: the avoiding groove (111) is a V-shaped groove.
6. A reading head for a grating ruler according to claim 1, wherein: the LED lamp is characterized in that more than one main light lamp (31) is arranged on the light emitting plate (3) at intervals, and a reference light lamp (32) is arranged on the light emitting plate (3) below the main light lamp (31).
7. A reading head for a grating ruler according to claim 6, wherein: the number of the main lamps (31) is 4.
8. A reading head for a grating ruler according to claim 1, wherein: more than one main receiver (41) is arranged on the receiving plate (4) at intervals, and reference receivers (42) are arranged on the receiving plate (4) below the main receivers (41) at intervals.
9. A reading head for a grating ruler according to claim 8, wherein: the main receiver (41) and the reference receiver (42) are photodetectors, and the number of the main receivers (41) is 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022626484.4U CN213179877U (en) | 2020-11-13 | 2020-11-13 | Reading head for grating ruler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022626484.4U CN213179877U (en) | 2020-11-13 | 2020-11-13 | Reading head for grating ruler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213179877U true CN213179877U (en) | 2021-05-11 |
Family
ID=75781416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022626484.4U Active CN213179877U (en) | 2020-11-13 | 2020-11-13 | Reading head for grating ruler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213179877U (en) |
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2020
- 2020-11-13 CN CN202022626484.4U patent/CN213179877U/en active Active
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Denomination of utility model: A reading head for grating ruler Effective date of registration: 20220922 Granted publication date: 20210511 Pledgee: Bank of China Limited by Share Ltd. Guangzhou Liwan branch Pledgor: Guangzhou Xinnuo grating digital display Co.,Ltd. Registration number: Y2022440000248 |