CN108106508B - Lever meter - Google Patents
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- CN108106508B CN108106508B CN201711463825.7A CN201711463825A CN108106508B CN 108106508 B CN108106508 B CN 108106508B CN 201711463825 A CN201711463825 A CN 201711463825A CN 108106508 B CN108106508 B CN 108106508B
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- 230000007246 mechanism Effects 0.000 claims abstract description 45
- 238000005259 measurement Methods 0.000 claims abstract description 29
- 238000004519 manufacturing process Methods 0.000 claims abstract description 26
- 238000006073 displacement reaction Methods 0.000 claims abstract description 24
- 239000004973 liquid crystal related substance Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 28
- 230000008569 process Effects 0.000 claims description 26
- 238000003756 stirring Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 19
- 230000033001 locomotion Effects 0.000 abstract description 13
- 230000009286 beneficial effect Effects 0.000 description 6
- 230000003321 amplification Effects 0.000 description 4
- 238000003199 nucleic acid amplification method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B3/00—Measuring instruments characterised by the use of mechanical techniques
- G01B3/22—Feeler-pin gauges, e.g. dial gauges
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- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention relates to a lever meter, which comprises a shell, a measuring lever, a displacement sensor and a singlechip; the tail end of the measuring lever extends into the shell and then swings synchronously with the displacement sensor to perform measurement; the singlechip is positioned in the shell, corrects and calculates a measurement result through a signal generated by swinging of the displacement sensor, and is also provided with a liquid crystal display for displaying the measurement result at the outer side of the shell; the displacement sensor consists of a fixed gate and a movable gate with a fan-shaped structure; the fixed grating is fixed above the tail end of the measuring lever in the shell, and the movable grating is fixed on the tail end of the measuring lever and swings relative to the fixed grating after being linked with the measuring lever. The lever meter avoids the whole precise motion transmission mechanism between the lever arm and the movable grid, on one hand, the production cost is greatly saved, and in addition, the lever arm and the movable grid do not have any intermediate motion transmission mechanism, so that errors formed by multistage transmission are reduced, and the measurement precision is greatly improved.
Description
Technical Field
The invention relates to the field of measuring equipment, in particular to a lever meter.
Background
The lever meter is also called a lever dial indicator or a leaning meter, the traditional lever meter is a measuring device which changes the dimension into pointer angular displacement by utilizing a lever-gear transmission mechanism and indicates the length dimension value, is used for measuring the geometric error and the mutual position correctness of workpieces, and can measure the length by a comparison method.
With the development of measurement technology, a digital display lever meter for digitally displaying measurement results through a displacement sensor appears in the market at present. The existing domestic and foreign digital display lever meters are all formed by changing the pointer of an indicator into a capacitive grating encoder on a mechanical component of the original mechanical lever meter, namely a gear transmission mechanism, so that the gear transmission mechanism is reserved. The mechanical component of the mechanical lever meter is a precise component, and particularly the manufacturing process of the precise gear transmission mechanism is complex, so that the requirement on production equipment is high, and the service life is also low.
The Chinese patent application No. CN99124574.1 discloses a grid-containing digital display lever meter, which simplifies the mechanical structure and the circuit structure of the traditional digital display lever meter to a certain extent, but the grid-containing digital display lever meter is provided with a movable grid on a rotary table, the rotary table is rotatably arranged through a rotating shaft (the rotating center of the rotary table), and the lever arm of the grid-containing digital display lever meter pushes the rotary table to rotate around the rotating shaft. Therefore, a motion transmission mechanism is formed between the lever arm of the grid-type digital display lever meter and the rotary disc, otherwise, the rotary disc cannot rotate, if the end part of the lever arm is a sector gear, the periphery of the rotary disc is provided with gear teeth matched with the sector gear, and the rotary disc is pushed to rotate by the swinging of the lever arm through the sector gear at the end part of the lever arm. No matter what kind of motion transmission mechanism is adopted between the lever arm and the rotary disc, at least one level of motion transmission can be increased, and only one level of motion transmission is increased, so that the cost is increased, errors are introduced, the increased transmission mechanism is worn out after repeated use in work, such as a gear, the precision is affected, and finally the service life of the lever meter is shortened.
Disclosure of Invention
In summary, in order to overcome the defects in the prior art, the technical problem to be solved by the invention is to provide a lever table.
The technical scheme for solving the technical problems is as follows: a lever meter comprises a shell, a measuring lever, a displacement sensor and a singlechip; the displacement sensor is positioned in the shell; the measuring lever is rotatably arranged on the shell, the front end of the measuring lever extends out of the shell, a measuring contact is arranged outside the shell, and the tail end of the measuring lever extends into the shell and then swings synchronously with the displacement sensor to perform measurement; the singlechip is positioned in the shell, corrects and calculates a measurement result through a signal generated by swinging of the displacement sensor, and is also provided with a liquid crystal display for displaying the measurement result at the outer side of the shell; the displacement sensor is any one of a capacitive grating sensor, a magnetic grating sensor or a CCD displacement sensor, and consists of a fixed grating and a movable grating with a fan-shaped structure; the fixed grating is fixed above the tail end of the measuring lever in the shell, and the movable grating is fixed on the tail end of the measuring lever and swings relative to the fixed grating after being linked with the measuring lever.
The beneficial effects of the invention are as follows: the lever meter avoids the whole precise motion transmission mechanism between the lever arm and the movable grid, on one hand, the production cost is greatly saved, and in addition, the lever arm and the movable grid do not have any intermediate motion transmission mechanism, so that errors formed by multistage transmission are reduced, and the measurement precision is greatly improved.
Based on the technical scheme, the invention can also be improved as follows:
further, an anti-deflection mechanism for limiting deflection of the measuring lever in the rotation process is arranged on the shell at a position corresponding to the measuring lever or the rotation center of the measuring lever.
Further, the measuring lever comprises a primary lever and a secondary lever which are arranged back and forth along the axial direction of the shell; the middle part of the primary lever is rotatably arranged at the end part of the shell through the rotation center assembly, the front end of the primary lever extends out of the shell to be connected with the measuring contact, and the tail end of the primary lever corresponds to the front part of the secondary lever; the front part of the secondary lever is provided with a rotating central shaft which enables the secondary lever to rotate in the shell, the front part of the secondary lever is respectively provided with a shifting pin which is shifted by the tail end of the primary lever from different directions and then keeps rotating in the same direction, and the tail end of the secondary lever is fixed with the movable gate; the shell is provided with an anti-deflection mechanism which limits the deflection of the rotating central shaft in the rotating process of the secondary lever, so that the deflection of the secondary lever in the rotating process is limited, and the constant gap between the fixed grid and the movable grid is ensured.
The beneficial effects of adopting the further scheme are as follows: the fixed grid and the movable grid can ensure the measurement precision only by keeping the constant gap in the relative swinging process, and the anti-deflection mechanism is arranged to ensure the constant gap between the fixed grid and the movable grid in the relative swinging process, so that the measurement precision is ensured.
Further, the anti-deflection mechanism comprises two limit screws; a fixed plate used for rotatably mounting the top of the rotating center shaft is arranged above the corresponding rotating center shaft in the shell, and the bottom of the rotating center shaft is rotatably mounted at a corresponding position on the shell; one of the limit screws is arranged in the shell, corresponds to the lower part of the movable grid and props up against the bottom of the movable grid, and the other limit screw is positioned on the fixed plate and props down against the upper surface of the primary lever.
Further, the anti-deflection mechanism comprises two deep groove ball bearings which limit the deflection of the rotating central shaft in the horizontal direction and the vertical direction; the two deep groove ball bearings are positioned in the shell and correspond to the upper and lower positions of the rotating central shaft, and the upper part and the lower part of the rotating central shaft are respectively sleeved on the two deep groove ball bearings.
Further, the anti-deflection mechanism comprises two thrust ball bearings which limit the deflection of the rotation center shaft in the horizontal direction and the vertical direction; the two thrust ball bearings are positioned in the shell and correspond to the upper and lower positions of the rotating central shaft, and the upper part and the lower part of the rotating central shaft are respectively sleeved on the two thrust ball bearings.
Further, the anti-deflection mechanism comprises two limiting shafts for limiting the rotation central shaft from deflection in the horizontal direction and the vertical direction; a fixed plate used for rotatably mounting the top of the rotating center shaft is arranged above the corresponding rotating center shaft in the shell, and the bottom of the rotating center shaft is rotatably mounted at a corresponding position on the shell; the two limiting shafts are arranged in the shell in parallel and correspond to the upper and lower positions of the middle part of the secondary lever.
Further, the anti-deflection mechanism is a guide groove matched with the tail end of the secondary lever; a fixed plate used for rotatably mounting the top of the rotating center shaft is arranged above the corresponding rotating center shaft in the shell, and the bottom of the rotating center shaft is rotatably mounted at a corresponding position on the shell; the guide groove is positioned in the shell at a position corresponding to the tail end of the secondary lever, and the tail end of the secondary lever extends out of the bottom of the movable grid and then reaches the guide groove.
The beneficial effects of adopting the further scheme are as follows: the anti-deflection mechanism in various forms ensures that the gap between the fixed grid and the movable grid is constant in the relative swinging process, and meets the requirements of different production or measurement works.
Further, the device also comprises a lead for identifying the direction of the primary lever to toggle the secondary lever; the bottom of the poking pin close to the movable gate is vertically arranged on the secondary lever through an insulating sleeve; one end of the wire is connected with the fixed gate, the other end of the wire is connected with a poking pin close to the movable gate, the fixed gate, the wire, the poking pin close to the movable gate and the primary lever can form a signal circuit which is conducted or disconnected under the poking of the primary lever to the secondary lever in different directions, and the singlechip identifies the poking direction of the primary lever to the secondary lever according to the conducting and disconnecting of the signal circuit and corrects manufacturing or assembling errors of parts on two sides of the rotating center shaft on the axial direction of the shell.
The beneficial effects of adopting the further scheme are as follows: the manufacturing or assembly errors of parts on two sides of the rotating central shaft are overcome by identifying the swinging direction of the primary lever, so that the measurement accuracy is further improved.
Further, the measuring lever is a primary measuring lever, and the movable gate is fixed on the tail end of the primary measuring lever; the anti-deflection mechanism comprises two limit screws; a fixed plate used for rotatably mounting the top of the rotating center shaft is arranged above the corresponding rotating center shaft in the shell, and the bottom of the rotating center shaft is rotatably mounted at a corresponding position on the shell; one of the limit screws is arranged in the shell, corresponds to the lower part of the movable grid and props up against the bottom of the movable grid, and the other limit screw is positioned on the fixed plate and props down against the upper surface of the primary lever.
The beneficial effects of adopting the further scheme are as follows: the measuring lever is simplified to be a primary lever, deflection of the lever in the measuring work is avoided, and the measuring precision is ensured while the structure of the lever meter is simplified.
Further, the device also comprises a lead for identifying the swinging direction of the primary lever; a supporting plate is rotatably arranged below the rear part of the primary lever in the shell and corresponds to the rotating shaft, a fixing plate for rotatably installing the top of the rotating shaft is arranged above the rotating shaft in the shell, and the bottom of the rotating shaft is rotatably installed at a corresponding position on the shell; the two axial sides of the supporting plate, which correspond to the rotation center of the supporting plate, are vertically provided with poking pins poked by the primary lever from different directions upwards, and the bottoms of the poking pins close to the movable grid are vertically arranged on the supporting plate through insulating sleeves;
one end of the wire is connected with the fixed gate, the other end of the wire is connected with a poking pin close to the movable gate, the fixed gate, the wire, the poking pin close to the movable gate and the primary lever can form a signal circuit which is connected or disconnected under the poking of the primary lever to the supporting plate in different directions, and the singlechip identifies the swinging direction of the primary lever according to the connection and disconnection of the signal circuit and corrects manufacturing or assembly errors of parts positioned on two sides of the rotation center of the primary lever in the axial direction of the shell.
The beneficial effects of adopting the further scheme are as follows: the manufacturing or assembly errors of parts on two sides of the rotating piece are overcome by identifying the swinging direction of the primary lever, so that the measurement precision is further improved.
Drawings
FIG. 1 is an exploded view of a first embodiment;
FIG. 2 is a top view of the first embodiment with the housing cover and grill removed;
FIG. 3 is a cross-sectional view A-A of FIG. 2;
FIG. 4 is a three-dimensional view of the removal plate of FIG. 2;
fig. 5 is an exploded view of the second embodiment (with the upper and lower covers of the case removed, and the lcd, etc.);
FIG. 6 is a top view of the second embodiment with the upper cover of the housing removed;
FIG. 7 is a cross-sectional view A-A of FIG. 6;
fig. 8 is an exploded view of the third embodiment (with the upper and lower covers of the case removed, and the liquid crystal display, etc.);
FIG. 9 is a top view of the third embodiment with the housing upper cover removed;
FIG. 10 is a cross-sectional view A-A of FIG. 9;
fig. 11 is an exploded view of the fourth embodiment (with the upper and lower covers of the case removed, and the liquid crystal display, etc.);
FIG. 12 is a top view of the fourth embodiment with the housing upper cover removed;
FIG. 13 is a cross-sectional view A-A of FIG. 12;
fig. 14 is an exploded view of the fifth embodiment (with the upper and lower covers of the case removed, and the lcd, etc.);
FIG. 15 is a top view of the fifth embodiment with the housing upper cover removed;
FIG. 16 is a cross-sectional view A-A of FIG. 15;
fig. 17 is an exploded view of the sixth embodiment (with the upper and lower covers of the case removed, and the liquid crystal display, etc.);
FIG. 18 is a top view of the sixth embodiment with the upper cover of the housing removed;
fig. 19 is a cross-sectional view A-A of fig. 18.
Fig. 20 is an exploded view of embodiment seven (with the upper and lower covers of the case removed, and the liquid crystal display, etc.);
FIG. 21 is a top view of a seventh embodiment with the upper cover of the housing removed;
FIG. 22 is a cross-sectional view A-A of FIG. 21;
fig. 23 is an enlarged view of B of fig. 22.
In the drawings, the list of components represented by the various numbers is as follows:
1. the device comprises a shell, 2, a primary lever, 3, a measuring contact, 4, a liquid crystal display, 5, a fixed grid, 6, a movable grid, 7, a secondary lever, 8, a rotation center shaft, 9, a poking pin, 10, a screw, 11, a deep groove ball bearing, 12, a thrust ball bearing, 13, a limiting shaft, 14, a guide groove, 15, a wire, 16, an insulating sleeve, 17, a sphere, 18, a rotating piece, 19, a cover body, 20, a supporting plate, 21 and a fixing plate.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
Example 1
As shown in fig. 1-4, a lever meter comprises a housing 1, a measuring lever, a displacement sensor and a single chip microcomputer. The displacement sensor is positioned in the shell 1, the measuring lever is rotatably arranged on the shell 1, the front end of the measuring lever extends out of the shell 1 and is provided with a measuring contact 3, and the tail end of the measuring lever extends into the shell 1 and then swings synchronously with the displacement sensor to perform measurement. The singlechip is positioned in the shell 1, corrects and calculates a measurement result through signals generated by swinging of the displacement sensor, and is also provided with a liquid crystal display 4 for displaying the measurement result outside the shell 1. The displacement sensor is any one of a capacitive grating sensor, a magnetic grating sensor or a CCD displacement sensor and consists of a fixed grating 5 and a movable grating 6 with a fan-shaped structure. The fixed grating 5 is fixed above the tail end of the measuring lever in the shell 1, and the movable grating 6 is fixed on the tail end of the measuring lever and swings relative to the fixed grating 5 after being linked with the measuring lever. Since the moving grating 6 is in a rotational movement rather than a translational movement with respect to the fixed grating 5, the moving grating 6 is designed as a fan-shaped structure, whereby the grating thereof is also designed as a fan-shape.
And an anti-deflection mechanism for limiting deflection of the measuring lever in the rotation process is arranged on the shell 1 at a position corresponding to the measuring lever or the rotation center of the measuring lever.
The measuring lever comprises a primary lever 2 and a secondary lever 7 which are arranged front and back along the axial direction of the shell 1; the middle part of the primary lever 2 is rotatably arranged at the end part of the shell 1, the front end of the primary lever extends out of the shell 1 to be connected with the measuring contact 3, and the tail end of the primary lever corresponds to the front part of the secondary lever 7; a rotation center shaft 8 for rotating the secondary lever 7 in the shell 1 is arranged at the front part of the secondary lever 7, a shifting pin 9 which is rotated in the same direction after being shifted from different directions by the tail end of the primary lever 2 is respectively arranged at the front side and the rear side of the front part of the secondary lever 7 corresponding to the rotation center shaft 8, and the movable gate 6 is fixed at the tail end of the secondary lever 7; the shell 1 is provided with an anti-deflection mechanism which limits the deflection of the rotating central shaft 8 in the rotating process of the secondary lever 7, thereby limiting the deflection of the secondary lever 7 in the rotating process so as to ensure the constant gap between the fixed grid 5 and the movable grid 6. The method comprises the following steps:
the anti-deflection mechanism comprises two limit screws 10; a fixed plate 21 for rotatably mounting the top of the rotary center shaft 8 is arranged above the rotary center shaft 8 in the shell 1, and the bottom of the rotary center shaft 8 is rotatably mounted at a corresponding position on the shell 1; one of the limit screws 10 is installed in the housing 1 and corresponds to the lower part of the movable grid 6 and props up against the bottom of the movable grid 6, and the other limit screw 10 is located on the fixed plate 21 and props down against the upper surface of the primary lever 2. In the measuring process, as the movable grid 6 is fixed on the secondary lever 7 to form a whole, the movable grid 6 is vertically supported and clamped in the middle by the two limit screws 10, and when the movable grid 6 rotates and measures relative to the fixed grid 5, the movable grid 6 rotates between the two limit screws 10. Under the action of the limit screw 10, the movable gate 6 cannot swing, so that a gap between the movable gate 6 and the fixed gate 5 is kept constant in the rotation process, and measurement accuracy is ensured (the movable gate swings and then swings under the action of a reset component such as a torsion spring, which is not described in the prior art). In addition, the movable grid 6 in the lever meter is directly fixed on the secondary lever 7, so that the whole precise motion transmission mechanism between the lever arm and the movable grid is avoided, on one hand, the production cost is greatly saved, and in addition, the lever arm and the movable grid do not have any intermediate motion transmission mechanism, so that errors caused by multistage transmission are reduced, and the measurement precision is further improved.
In the existing lever meter, parts which are required to be positioned on two sides of the rotation center of the measuring lever and relatively rotate are required to achieve high manufacturing precision, such as micrometer tolerance precision, or the parts can meet the requirements only by continuously debugging and overcoming manufacturing or assembling errors in the assembling process. If the part is to be to a tolerance accuracy on the order of microns, such as an IT1 class, an IT2 class tolerance, this can lead to a substantial increase in the manufacturing cost of the part. Therefore, in order to overcome the above technical problems, the current mechanical lever meter is usually calibrated by a professional technician, which has very high requirements on related personnel and needs to be trained for a long time. The invention overcomes the technical problems by the following scheme:
the lever meter further comprises a wire 15 for identifying the direction in which the primary lever 2 is shifted to the secondary lever 7. The bottom of the poking pin 9 close to the movable gate 6 is vertically arranged on the secondary lever 7 through an insulating sleeve 16, one end of the wire 15 is connected with the fixed gate 5, the other end of the wire 15 is connected with the poking pin 9 close to the movable gate 6, and the fixed gate 5, the wire 15, the poking pin 9 close to the movable gate 6 and the primary lever 2 can form a signal circuit which is conducted or disconnected under the poking of the primary lever 2 to the secondary lever 7 in different directions; the singlechip identifies the stirring direction of the primary lever 2 to the secondary lever 7 according to the connection and disconnection of the signal circuit, and corrects manufacturing or assembly errors of parts on two sides of the rotating central shaft 8 in the axial direction of the shell 1. Referring to fig. 4, when the end of the primary lever 2 rotates in the direction a (the primary lever 2 dials the dial pin 9 far from the movable gate 6), the end of the primary lever 2 is far from the dial pin 9 near the movable gate 6, and when the end of the primary lever 2 is separated from the dial pin 9 near the movable gate 6 due to the insulating sleeve 16 arranged at the bottom of the dial pin 9, the signal circuit formed by the fixed gate 5, the wire 15, the dial pin 9 near the movable gate 6 and the primary lever 2 is changed from the original on state to off; on the contrary, when the tail end of the primary lever 2 rotates in the opposite direction of the direction a (the primary lever 2 dials the dial pin 9 close to the movable gate 6), the tail end of the primary lever 2 is always clung to the dial pin 9 close to the movable gate 6 in the whole rotation process, and the signal circuit is always kept in a conducting state. The single chip microcomputer can identify the rotation direction of the primary lever 2 according to the state change of the signal circuit, and then the single chip microcomputer corrects manufacturing or assembly errors of parts at two sides of the rotation center (the rotation center shaft 8) of the secondary lever 7 respectively, so that the final caused precision errors are avoided. In summary, through the additional installation of the lead 15, the single-chip microcomputer recognizes the swinging direction of the primary lever 2, overcomes the manufacturing or assembling errors of parts on two sides of the rotating center shaft, reduces the manufacturing and assembling precision requirements on the parts while guaranteeing the measuring precision, avoids the repeated debugging work of professional technicians, and greatly reduces the production and manufacturing cost.
In addition, since the sensor moving grids 6 are directly fixed on the measuring lever arm, the fixed positions thereof determine the amplification ratio in the measuring process of the lever meter, and since the fixed positions of each moving grid 6 are difficult to be guaranteed to be identical in the mass production process, the amplification ratio error is generated, and the product precision is affected. The invention uses the singlechip with the singlechip to carry out coefficient correction on the amplification ratio of each lever meter, can ensure the accuracy of measuring the amplification ratio of the lever, ensures that the movable gate 6 is installed on the measuring lever arm without strict position requirements in the production process, reduces the assembly difficulty and greatly reduces the manufacturing cost.
Example two
In this embodiment, the anti-sway mechanism is changed, and other structures are identical to those of the embodiment. As shown in fig. 5 to 7, the anti-sway mechanism comprises two deep groove ball bearings 11 for limiting the sway of the rotation center shaft 8 in the horizontal direction and the vertical direction; the two deep groove ball bearings 11 are positioned in the shell 1 and correspond to the upper and lower positions of the rotating central shaft 8, and the upper part and the lower part of the rotating central shaft 8 are respectively sleeved on the two deep groove ball bearings 11. Due to its own structural characteristics, the inner ring of the deep groove ball bearing 11 is fixed in position in the radial direction, i.e., in the horizontal direction, and can slide up and down (top and bottom dead centers) in the axial direction, i.e., in the vertical direction. Therefore, the first deep groove ball bearing 11 is sleeved on the rotary central shaft 8, so that the rotary central shaft 8 can be limited to deflect in the horizontal direction; when the second deep groove ball bearing 11 is installed, no matter the second deep groove ball bearing 11 is located above or below the first deep groove ball bearing 11, only the inner ring of the second deep groove ball bearing 11 and the inner ring of the first deep groove ball bearing 11 are guaranteed to be arranged in a staggered mode, if the inner ring of the first deep groove ball bearing 11 is located at the top dead center, the inner ring of the second deep groove ball bearing 11 is located at the bottom dead center, and the inner rings of the two deep groove ball bearings cannot slide up and down in the vertical direction under interaction, so that deflection of the rotation center shaft 8 in the horizontal direction and the vertical direction is limited. The rotation center shaft 8 does not generate deflection, the gap between the movable grid 6 and the fixed grid 5 can be kept constant in the rotation process of the movable grid, and finally the measurement accuracy is ensured.
Example III
In this embodiment, the anti-sway mechanism is changed, and other structures are identical to those of the embodiment. As shown in fig. 8 to 10, the anti-sway mechanism comprises two thrust ball bearings 12 for restricting the sway of the rotation center shaft 8 in the horizontal direction and the vertical direction; the two thrust ball bearings 12 are located in the housing 1 and correspond to the upper and lower positions of the rotation center shaft 8, and the upper and lower parts of the rotation center shaft 8 are respectively sleeved on the two deep groove ball bearings 12. The thrust ball bearing 12 has an inner ring fixed in position in the axial direction, i.e., in the vertical direction, and is slidable in the radial direction, i.e., in the horizontal direction (right-left dead center) due to its own structural characteristics. Therefore, the first thrust ball bearing 12 is sleeved on the rotary central shaft 8, so that the rotary central shaft 8 can be limited to deflect in the vertical direction; when the second thrust ball bearing 12 is installed, no matter the second thrust ball bearing 12 is positioned above or below the first thrust ball bearing 12, only the staggered arrangement of the inner ring of the second thrust ball bearing 12 and the inner ring of the first thrust ball bearing 12 is ensured, if the inner ring of the first thrust ball bearing 12 is positioned at the left dead point, the inner ring of the second thrust ball bearing 12 is positioned at the right dead point, and the inner rings of the two deep groove ball bearings cannot slide left and right in the horizontal direction under the interaction, so that the deflection of the rotation center shaft 8 in the horizontal direction and the vertical direction is limited. The rotation center shaft 8 does not generate deflection, the gap between the movable grid 6 and the fixed grid 5 can be kept constant in the rotation process of the movable grid, and finally the measurement accuracy is ensured.
Example IV
In this embodiment, the anti-sway mechanism is changed, and other structures are identical to those of the embodiment. As shown in fig. 11-13, the anti-deflection mechanism includes two limiting shafts 13 for limiting the deflection of the rotation center shaft 8 in the horizontal direction and the vertical direction; a fixed plate 21 for rotatably mounting the top of the rotary center shaft 8 is arranged above the rotary center shaft 8 in the shell 1, and the bottom of the rotary center shaft 8 is rotatably mounted at a corresponding position on the shell 1; the two limiting shafts 13 are arranged in parallel in the shell 1 and correspond to the upper and lower positions of the middle part of the secondary lever 7. The secondary lever 7 is positioned between the upper limiting shaft 13 and the lower limiting shaft 13, the distance between the limiting shafts 13 is matched with the secondary lever 7, and the secondary lever 7 can only rotate between the two limiting shafts 13, so that the secondary lever 7 is limited from swinging. Because the secondary lever 7 and the movable gate 6 are the same rotation center (rotation center shaft 8), the two have no relative motion in the measurement process, and the gap between the movable gate 6 and the fixed gate 5 can be kept constant in the rotation process of the secondary lever 7 on the premise that the secondary lever 7 does not swing, and finally the measurement accuracy can be ensured.
Example five
In this embodiment, the anti-sway mechanism is changed, and other structures are identical to those of the embodiment. As shown in fig. 14-16, the anti-deflection mechanism is a guide groove 14 matched with the tail end of the secondary lever 7; a fixed plate 21 for rotatably mounting the top of the rotary center shaft 8 is arranged above the rotary center shaft 8 in the shell 1, and the bottom of the rotary center shaft 8 is rotatably mounted at a corresponding position on the shell 1; the guide groove 14 is located at a position corresponding to the tail end of the secondary lever 7 in the shell 1, and the tail end of the secondary lever 7 extends to the outer side of the bottom of the movable grid 6 and then reaches the guide groove 14. The cavity of the guide groove 14 is matched with the movable grating 6, the tail end of the movable grating 6 swings downwards in the cavity of the guide groove 14 and guided by the guide groove 14, the gap between the movable grating 6 and the fixed grating 5 can be kept constant in the rotating process, and finally the measuring precision can be ensured.
Example six
As shown in fig. 17 to 19, the measuring lever is a primary measuring lever 2, and the movable gate 6 is fixed on the end of the primary measuring lever 2; the anti-deflection mechanism comprises two limit screws 10; a fixed plate 21 for rotatably mounting the top of the rotary center shaft 8 is arranged above the rotary center shaft 8 in the shell 1, and the bottom of the rotary center shaft 8 is rotatably mounted at a corresponding position on the shell 1; one of the limit screws 10 is installed in the housing 1 and corresponds to the lower part of the movable grid 6 and props up against the bottom of the movable grid 6, and the other limit screw 10 is located on the fixed plate 21 and props down against the upper surface of the primary lever 2. The anti-deflection principle of the embodiment is the same as that of the first embodiment, the constant clearance between the movable grid 6 and the fixed grid 5 in the rotation process can be ensured, the measurement precision is improved, in the embodiment, the movable grid 6 is fixed at the tail end of the primary measurement lever 2, a secondary lever is omitted, and the whole mechanical structure is simpler. After the secondary lever is omitted, the swinging directions of the measuring contact 3 and the movable gate 6 are opposite, the zero point of the lever meter is located at the middle position, and the zero point is located at one side position in the other than the first to fifth embodiments. Therefore, when the same measuring range is achieved under the same condition, the volume of the lever meter of the embodiment is slightly larger, and the measuring precision is greatly improved due to only one-stage transmission. In addition, the lever meter adopting the primary lever structure in the embodiment can adopt the anti-deflection mechanism of any one of the second to fifth embodiments according to actual needs to ensure the constant gap between the movable gate 6 and the fixed gate 5 in the rotating process and improve the measuring precision.
As above, the invention reduces the precision requirements of manufacturing and assembling parts by arranging the lead 15, and is specifically as follows:
a supporting plate 20 is rotatably arranged below the rear part of the primary lever 2 in the shell 1 and corresponds to the rotary shaft 22, a fixing plate 21 for rotatably installing the top of the rotary shaft 22 is arranged above the rotary shaft 22 in the shell 1, and the bottom of the rotary shaft 22 is rotatably installed at a corresponding position on the shell 1; the two axial sides of the support plate 20 corresponding to the rotation center of the support plate are vertically and upwards provided with poking pins 9 poked by the primary lever 2 from different directions, and the bottoms of the poking pins 9 close to the movable grid 6 are vertically arranged on the support plate 20 through insulating sleeves 16. One end of the wire 15 is connected with the fixed gate 5, the other end of the wire is connected with the poking pin 9 close to the movable gate 6, and the fixed gate 5, the wire 15, the poking pin 9 close to the movable gate and the primary lever 2 can form a signal circuit which is conducted or disconnected under the poking of the primary lever 2 to the supporting plate 20 in different directions; the singlechip identifies the swinging direction of the primary lever 2 according to the connection and disconnection of the signal circuit, and corrects manufacturing or assembly errors of parts positioned on two sides of the rotation center of the primary lever 2 in the axial direction of the shell 1.
Referring to fig. 18, when the end of the primary lever 2, i.e., the moving gate 6, rotates in the direction b, the position (middle portion) of the moving gate 6 corresponding to the shifting pin 9 away from the moving gate 6 also rotates in the direction b, the middle portion of the primary lever 2 is away from the shifting pin 9 close to the moving gate 6, and when the middle portion of the primary lever 2 is separated from the shifting pin 9 close to the moving gate 6, the signal circuit formed by the fixed gate 5, the wire 15, the shifting pin 9 close to the moving gate 6 and the primary lever 2 is changed from the original on state to the off state; on the contrary, when the end of the primary lever 2 rotates in the opposite direction of the direction b, the middle part of the primary lever 2 is always closely attached to the poking pin 9 close to the movable gate 6 in the whole rotation process, and the signal circuit is always kept in a conducting state (the supporting plate synchronously rotates and resets after rotation). The single chip microcomputer can identify the rotation direction of the primary lever 2 according to the state change of the signal circuit, and then the single chip microcomputer corrects manufacturing or assembly errors of parts at two sides of the rotation center of the primary lever 2 respectively, so that the final caused precision errors can be avoided.
Example seven
In this embodiment, the anti-sway mechanism is changed, and other structures are the same as those in the sixth embodiment. As shown in fig. 20-23, the anti-sway mechanism comprises a sphere 17 and a rotating piece 18, wherein the rotating piece 18 is positioned in the middle of the end part of the shell 1, and the top and the bottom of the rotating piece are respectively provided with a conical groove matched with the sphere 17; two spheres 17 are arranged, and the two spheres 17 are respectively positioned in the conical grooves; the middle part of the primary lever 2 is connected with the rotating member 18, a cover 19 for pressing the ball 17 into the corresponding conical groove to limit the rotating member 18 from swinging is arranged at the position of the end part of the shell 1 corresponding to the ball 17 in a threaded manner, and the position of the cover 19 corresponding to the ball 17 is also provided with the conical groove matched with the ball 17. The upper cover 19 and the lower cover 19 are rotated to adjust the position of the sphere 17 in the conical groove, so that the two sides of the top and the bottom of the sphere 17 are tangential to the inner wall of the conical groove, the sphere 17 is guaranteed to rotate around the axial direction of the sphere in the conical groove without deflecting, and meanwhile, the sphere can rotate with the minimum friction force, and further, the constant gap between the sphere and the fixed grid 5 in the rotation process of the movable grid 6 is guaranteed.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (7)
1. A lever meter comprises a shell (1), a measuring lever, a displacement sensor and a singlechip; the displacement sensor is positioned inside the shell (1); the measuring lever is rotatably arranged on the shell (1), the front end of the measuring lever extends out of the shell (1), a measuring contact (3) is arranged outside the shell, and the tail end of the measuring lever extends into the shell (1) and then swings synchronously with the displacement sensor to perform measurement; the singlechip is positioned in the shell (1) and corrects and calculates a measurement result through a signal generated by swinging of the displacement sensor, and a liquid crystal display (4) for displaying the measurement result is also arranged on the outer side of the shell (1); the displacement sensor is any one of a capacitive grating sensor, a magnetic grating sensor or a CCD displacement sensor, and consists of a fixed grating (5) and a movable grating (6) with a fan-shaped structure; the fixed grating (5) is fixed above the tail end of the measuring lever in the shell (1), and the movable grating (6) is fixed on the tail end of the measuring lever and swings relative to the fixed grating (5) after being linked with the measuring lever;
the position of the shell (1) corresponding to the rotation center of the measuring lever or the measuring lever is provided with an anti-deflection mechanism for limiting deflection of the measuring lever in the rotation process;
the measuring lever comprises a primary lever (2) and a secondary lever (7) which are arranged front and back along the axial direction of the shell (1); the middle part of the primary lever (2) is rotatably arranged at the end part of the shell (1), the front end of the primary lever extends out of the shell (1) to be connected with the measuring contact (3), and the tail end of the primary lever corresponds to the front part of the secondary lever (7); a rotating central shaft (8) which enables the secondary lever (7) to rotate in the shell (1) is arranged at the front part of the secondary lever (7), a shifting pin (9) which is rotated in the same direction after being shifted from different directions by the tail end of the primary lever (2) is respectively arranged at the front side and the rear side of the secondary lever (7) corresponding to the rotating central shaft (8), and the movable grid (6) is fixed at the tail end of the secondary lever (7); the shell (1) is provided with an anti-deflection mechanism which limits the deflection of the rotating central shaft (8) in the rotating process of the secondary lever (7) so as to limit the deflection of the secondary lever (7) in the rotating process to ensure the constant gap between the fixed grid (5) and the movable grid (6).
2. Lever watch according to claim 1, characterized in that said anti-sway mechanism comprises two limit screws (10); a fixed plate (21) used for rotatably mounting the top of the rotary center shaft (8) is arranged above the rotary center shaft (8) in the shell (1), and the bottom of the rotary center shaft (8) is rotatably mounted at a corresponding position on the shell (1); one of the limit screws (10) is arranged in the shell (1) and corresponds to the lower part of the movable grid (6) and props up against the bottom of the movable grid (6), and the other limit screw (10) is positioned on the fixed plate (21) and props down against the upper surface of the primary lever (2).
3. Lever watch according to claim 1, characterized in that said anti-sway mechanism comprises two deep groove ball bearings (11) limiting the sway of said rotation central shaft (8) in horizontal and vertical directions; the two deep groove ball bearings (11) are positioned in the shell (1) and correspond to the upper and lower positions of the rotating central shaft (8), and the upper part and the lower part of the rotating central shaft (8) are respectively sleeved on the two deep groove ball bearings (11).
4. Lever watch according to claim 1, characterized in that said anti-sway mechanism comprises two thrust ball bearings (12) limiting the sway of said rotation central shaft (8) in horizontal and vertical directions; the two thrust ball bearings (12) are positioned in the shell (1) and correspond to the upper and lower positions of the rotating central shaft (8), and the upper part and the lower part of the rotating central shaft (8) are respectively sleeved on the two thrust ball bearings (12).
5. Lever watch according to claim 1, characterized in that said anti-sway mechanism comprises two limit shafts (13) which limit the sway of said rotation central shaft (8) in horizontal and vertical directions; a fixed plate (21) used for rotatably mounting the top of the rotary center shaft (8) is arranged above the rotary center shaft (8) in the shell (1), and the bottom of the rotary center shaft (8) is rotatably mounted at a corresponding position on the shell (1); the two limiting shafts (13) are arranged in the shell (1) in parallel and correspond to the upper and lower positions of the middle part of the secondary lever (7).
6. Lever watch according to claim 1, characterized in that said anti-sway mechanism is a guide slot (14) matching the end of said secondary lever (7); a fixed plate (21) used for rotatably mounting the top of the rotary center shaft (8) is arranged above the rotary center shaft (8) in the shell (1), and the bottom of the rotary center shaft (8) is rotatably mounted at a corresponding position on the shell (1); the guide groove (14) is positioned in the shell (1) at a position corresponding to the tail end of the secondary lever (7), and the tail end of the secondary lever (7) extends to the outer side of the bottom of the movable grid (6) and then reaches the guide groove (14).
7. Lever watch according to any one of claims 1 to 6, characterized in that it further comprises a wire (15) identifying the direction in which said primary lever (2) toggles said secondary lever (7); the bottom of the poking pin (9) close to the movable gate (6) is vertically arranged on the secondary lever (7) through an insulating sleeve (16); one end of the wire (15) is connected with the fixed grid (5), the other end of the wire is connected with the poking pin (9) close to the movable grid (6), and the fixed grid (5), the wire (15), the poking pin (9) close to the movable grid (6) and the primary lever (2) can form a signal circuit which is conducted or disconnected under the poking of the primary lever (2) to the secondary lever (7) in different directions; the singlechip identifies the stirring direction of the primary lever (2) to the secondary lever (7) according to the connection and disconnection of the signal circuit, and corrects manufacturing or assembling errors of parts on two sides of the rotating central shaft (8) in the axial direction of the shell (1).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711463825.7A CN108106508B (en) | 2017-12-28 | 2017-12-28 | Lever meter |
| PCT/CN2018/095986 WO2019128199A1 (en) | 2017-12-28 | 2018-07-17 | Lever gauge |
| US16/610,501 US11175121B2 (en) | 2017-12-28 | 2018-07-17 | Lever indicator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711463825.7A CN108106508B (en) | 2017-12-28 | 2017-12-28 | Lever meter |
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| Publication Number | Publication Date |
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| CN108106508A CN108106508A (en) | 2018-06-01 |
| CN108106508B true CN108106508B (en) | 2023-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711463825.7A Active CN108106508B (en) | 2017-12-28 | 2017-12-28 | Lever meter |
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| CN (1) | CN108106508B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019128199A1 (en) * | 2017-12-28 | 2019-07-04 | 桂林市晶准测控技术有限公司 | Lever gauge |
| CN108592842B (en) * | 2018-08-06 | 2024-04-16 | 台州市诺伊曼科技有限公司 | Micro-motion displacement sensor |
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| CN108106508A (en) | 2018-06-01 |
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