CN113155006A - Slider position appearance measuring platform based on capacitance displacement sensor principle - Google Patents
Slider position appearance measuring platform based on capacitance displacement sensor principle Download PDFInfo
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- CN113155006A CN113155006A CN202110535613.5A CN202110535613A CN113155006A CN 113155006 A CN113155006 A CN 113155006A CN 202110535613 A CN202110535613 A CN 202110535613A CN 113155006 A CN113155006 A CN 113155006A
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- guide rail
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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
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a slider pose measuring platform based on a capacitance displacement sensor, which comprises a driving motor, a rigid coupler, a torque sensor, an elastic coupler, a bearing seat, a crank disc, an output shaft, a connecting rod, an adjusting handle, a guide rail supporting column, a fastener, a slider, a first guide rail, a second guide rail, a rack, a connecting rod mounting block, a nylon slider, a metal polar plate and a polar plate fixing piece. The driving motor is connected with the torque sensor through the rigid coupler and then connected with the crank disc through the elastic coupler, one end of the connecting rod is connected with the crank disc, the other end of the connecting rod is connected with the mounting hole in the sliding block through the fastener, and the sliding block forms a complete sliding pair with the first guide rail and the second guide rail. By adopting the technical scheme of the invention, the stepless regulation of the gap between the sliding block and the sliding rail can be realized, the free state and the collision phenomenon in the moving process of the sliding block can be effectively distinguished, and the experimental technical problem of the dynamic research of the clearance of the sliding pair is solved.
Description
Technical Field
The invention relates to the field of mechanical design, in particular to a sliding block pose measuring platform based on a capacitive displacement sensor principle.
Background
With the continuous improvement of comprehensive national force and the continuous development of precise mechanical structures in China, the precision requirement of the current engineering practical application on a mechanical system is higher and higher, and the requirements on the stability and the anti-interference capability of an engineering mechanical motion process are also higher and higher, so that the dynamic characteristics of the mechanical structure need to be further deeply researched, and the mechanical motion process needs to be more refined so as to comprehensively improve the motion stability and the comprehensive performance of the mechanical structure.
Patent document CN205154901U discloses an adjustable gap slider for a linear slide rail, which has the following main technical scheme: the utility model provides a linear sliding rail is with adjustable clearance slider includes the slider main part, set up T type groove in the slider main part, the baffle is all installed at slider main part both ends, the baffle passes through fixing bolt and is connected with the slider main part, one side that the T type inslot of slider main part is close to slider main part top surface sets up first sloping block, first sloping block one side sets up the second sloping block, the contact of T type groove lateral wall of second sloping block and slider main part, first sloping block and second sloping block are the cushion that both ends thickness is different, all set up first screw and second screw on the baffle at slider main part both ends, install first adjusting bolt in each first screw, install second adjusting bolt in each second screw, the first adjusting bolt at slider main part both ends contacts with first sloping block both ends respectively, the second adjusting bolt at slider main part both ends contacts with second sloping block both ends respectively. The requirement on equipment processing precision in the production process of the sliding block can be reduced and the production cost of the sliding block is reduced through the structural adjustment of the sliding block, but the original contact surface of the sliding block is possibly changed due to the adjustment of the structure of the sliding block, so that the working environment of the sliding block is damaged, the state of the sliding block in the motion process is not further subdivided, and the further research and discussion of the problems are not facilitated.
Patent document CN106989913B discloses a sliding pair experiment simulation device with adjustable gap between sliding block and guide rail, which has the main technical scheme that: the utility model provides a slider and guide rail clearance adjustable sliding pair experiment analogue means, it is equipped with the guide rail support frame, the guide rail support frame comprises connecting plate and backup pad, be equipped with the guide rail curb plate in characterized in that guide rail support frame's the backup pad, the upper and lower both sides of guide rail curb plate are equipped with the guide rail baffle, the guide rail baffle is by fine setting portion, location portion and joint portion are constituteed, fine setting portion is a fine setting board, be equipped with the fine setting slotted hole on the fine setting board, be equipped with the fine setting screw in the fine setting slotted hole, location portion is a locating plate, joint portion is a joint board, form the track chamber between locating plate and the joint board in the guide rail baffle and the guide rail curb plate, the track intracavity is equipped with the slider, be equipped with the adjustment hole on the locating plate of one of them guide rail baffle, be equipped with clearance adjustment screw in the adjustment hole, clearance adjustment screw passes the adjustment hole and is connected with the screw hole that is equipped with on the guide rail curb plate. The clearance adjustment is carried out in a mode of the inner hexagon screws, and the sliding pair clearance adjusting device has the advantages that the clearance between the sliding pair guide rail and the sliding block can be conveniently and rapidly adjusted, but the adjusting clearance value cannot be accurately obtained, the moving process state of the sliding block cannot be distinguished, and the sliding pair clearance adjusting device is not beneficial to further research on the sliding pair.
It is known that clearances are inevitable in order to ensure smooth assembly of mechanical parts and normal movement of kinematic pairs. The clearance deviates the motion of an actual mechanism from the motion of an ideal mechanism, high-order vibration of a system is excited, the motion precision of the mechanism is reduced, meanwhile, collision in the clearance causes impact dynamic load, the transmission of the system load is influenced, and the damage and the failure of a kinematic pair are easily caused, so that the research on the clearance of the kinematic pair is urgent.
At present, theoretical research on the clearance of the sliding pair has been carried out with more results, but the research on the experiment has some defects, which are mainly shown as follows:
1. the existing experimental device has the problems that the original working environment of the sliding block can be damaged and the size of the gap value of single adjustment cannot be obtained when the gap between the sliding block and the sliding rail is adjusted.
2. The dynamic research of the existing experimental device on the clearance of the sliding pair is usually limited to an acceleration sensor, and the motion state of the sliding block is not directly monitored.
3. The existing experimental device is lack of distinguishing the contact state and the free state between the sliding block and the sliding rail, and meanwhile, the collision and impact phenomena in the state switching process are not explored.
4. The existing experimental device is not enough in adaptability to the study of the clearance of the sliding pair and lacks a more flexible assembling and disassembling structure.
Disclosure of Invention
In order to overcome the defects of the experimental device, the invention provides a scheme of a moving pair clearance measuring platform based on the principle of a capacitance displacement sensor.
The technical scheme adopted by the invention for solving the technical problems is as follows: a slider pose measuring platform based on a capacitive displacement sensor principle comprises a driving motor 1, a rigid coupler 2, a torque sensor 3, an elastic coupler 4, a bearing seat 5, a crank disc 6, an output shaft 7, a connecting rod 8, an adjusting handle 9, a guide rail supporting column 10, a fastener 11, a slider 12, a first guide rail 13, a second guide rail 14, a rack 15, a connecting rod mounting block 16, a nylon slider 17, a metal slider 18, a metal polar plate 19 and a polar plate fixing piece 20.
A frame 15 is arranged in the measuring platform, and a driving motor 1, a torque sensor 3 and a bearing seat 5 are arranged on the frame 15; the output shaft of the driving motor 1 extends forwards and is connected with the torque sensor 3 through the rigid coupling 2, the output shaft of the torque sensor 3 extends forwards and is connected with one end of the output shaft 7 through the elastic coupling 4, the other end of the output shaft 7 penetrates through the bearing seat 5 to be connected with a central mounting hole of the crank disc 6, symmetrical connecting rod mounting through holes and balance weight mounting holes are formed in the crank disc 6, the connecting rod mounting through holes are connected with one end of a connecting rod 8, the other end of the connecting rod 8 is connected with a mounting hole in the sliding block 12 through a fastening piece 11, and the sliding block 12, the first guide rail 13 and the second guide rail 14 form a complete moving pair.
The bottom ends of the first guide rail 13 and the second guide rail 14 are provided with moving blocks, the moving blocks can slide in the tracks of the guide rail support columns 10, the centers of the moving blocks are provided with threaded through holes, the shafts of the adjusting handles 9 are provided with corresponding threads, and the adjusting handles 9 are installed in the central threaded through holes of the moving blocks. In order to achieve the purpose of adjusting the gap between the sliding block 12 and the sliding rail, the first guide rail 13 and the guide rail support column 10 are relatively fixed, the adjusting handle 9 can be rotated to enable the moving block of the second guide rail 14 to move in the track of the guide rail support column 10 through the threaded matching of the adjusting handle 9 and the moving block, so that the distance between the first guide rail 13 and the second guide rail 14 is changed, and the purpose of adjusting the gap of the moving pair is achieved.
And metal long polar plates with corresponding areas are arranged between the metal polar plates 19 and the first guide rail 13 and the second guide rail 14.
The operation method of the invention is as follows:
step 1: ten metal pole plates 19 are sequentially installed on the sliding block 11 through the pole plate fixing piece 20;
step 2: rotating the adjusting handles 9 at two sides to zero the gap between the guide rail and the sliding block;
and step 3: starting a motor, wherein a driving motor 1 drives a sliding block 12 to reciprocate in a groove between a first guide rail 13 and a second guide rail 14 through a rigid coupling 2, a torque sensor 3, a flexible coupling 4, a crank disc 6, an output shaft 7, a connecting rod 8 and a connecting rod mounting block 16;
and 4, step 4: recording data measured by the torque sensor 3 and recording the capacitance value between the metal polar plate 19 and the metal long polar plate on the guide rail;
and 5: transmitting the obtained data to a computer for processing, analyzing the slide block and the motion state in time intervals, and distinguishing the collision and free sliding state of the slide block in the motion process;
step 6: closing the driving motor 1, rotating the adjusting handle 9, and adjusting the gap between the guide rail and the slide block 11 to a proper position;
and 7: repeating the step 3, and recording experimental data under different gap values;
and 8: and comparing the experimental results of different clearance values, and verifying the theoretical result.
Preferably, the rigid coupling 2 is an oldham coupling.
Preferably, the elastic coupling 4 is an elastic slider coupling.
Preferably, the first guide rail 13 is a left side guide rail of a moving pair, and is connected to the guide rail support column 10 through a bottom moving block thereof.
Preferably: the second guide rail 14 is a right guide rail of a moving pair and is connected with the guide rail support column 10 through a bottom moving block.
Preferably, the fastening member 11 is a sleeve and a pin with different diameters.
The advantages of the invention are embodied in that:
1. aiming at the slide rail clearance adjusting mode in the background technology, the improvement point is that the working principle of a micrometer screw gauge is referred, the guide rail is driven to move by adjusting the threads on the handle, the contact surface between the sliding block and the guide rail is prevented from being damaged, the proper opposite area between the inner side surface of the sliding block and the outer surface of the guide rail is kept, and meanwhile, the guide rail moving amount of the handle moving at a certain angle can be obtained through related calculation, so that the clearance adjusting value between the sliding block and the guide rail is determined, and the clearance adjustment is facilitated.
2. The method aims at the slider motion detection mode in the background technology, and has the improvement points that a measuring device is directly installed on a slider, and non-contact measurement is adopted between the measuring device and a slide rail, so that the direct detection of the slider motion is realized, the interference on the slider motion is avoided, the real motion state of the slider can be intuitively reflected, and the influence of the gap between the slider and the slide rail on the whole system is explored.
3. Aiming at the distinguishing of the contact state, the free state and the collision phenomenon of the sliding block in the background technology, the improvement point is that the position and the state of the sliding block at any moment can be recorded in real time through data generated by a measuring device, and the contact state, the free motion state and the collision phenomenon of the sliding block can be obtained by combining the analysis of the moving track of the sliding block at each time interval.
4. Aiming at the adaptability of the clearance research of the sliding pair in the background technology, the improvement point is that non-contact measurement is adopted, which means that the installation form of the sliding pair can be changed at will, the measurement can be realized only by changing the corresponding installation position of the sensor on the sliding block, and if the sensor measurement is added on the side surface of the sliding block, the space motion state of the sliding block can be obtained, and the adaptability of the clearance research of the sliding pair is greatly improved.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a front isometric view of the present invention.
FIG. 2 is a partial cutaway view of a front isometric view of the present invention.
Fig. 3 is an assembly view of the slider guide of the present invention and a close up view of the scale of the handle.
Fig. 4 is a front view of the crank disk of the present invention.
Fig. 5 is an isometric view of the slider assembly of the present invention.
Fig. 6 is an isometric view of the metal plate assembly of the present invention.
Figure 7 is an isometric view of a guide rail support post of the present invention.
In the figure: the device comprises a driving motor 1, a rigid coupling 2, a torque sensor 3, an elastic coupling 4, a bearing seat 5, a crank disc 6, an output shaft 7, a connecting rod 8, an adjusting handle 9, a guide rail supporting column 10, a fastening piece 11, a sliding block 12, a first guide rail 13, a second guide rail 14, a rack 15, a connecting rod mounting block 16, a nylon sliding block 17, a metal sliding block 18, a metal pole plate 19 and a pole plate fixing piece 20.
Detailed Description
The invention is described in further detail below with reference to the figures and specific examples of the specification.
As shown in fig. 1: the technical scheme adopted by the invention for solving the technical problems is as follows: a slider pose measuring platform based on a capacitive displacement sensor principle comprises a driving motor 1, a rigid coupler 2, a torque sensor 3, an elastic coupler 4, a bearing seat 5, a crank disc 6, an output shaft 7, a connecting rod 8, an adjusting handle 9, a guide rail supporting column 10, a fastener 11, a slider 12, a first guide rail 13, a second guide rail 14, a rack 15, a connecting rod mounting block 16, a nylon slider 17, a metal slider 18, a metal polar plate 19 and a polar plate fixing piece 20.
A frame 15 is arranged in the measuring platform, and a driving motor 1, a torque sensor 3 and a bearing seat 5 are arranged on the frame 15; the output shaft of the driving motor 1 extends forwards and is connected with the torque sensor 3 through the rigid coupling 2, the output shaft of the torque sensor 3 extends forwards and is connected with one end of the output shaft 7 through the elastic coupling 4, the other end of the output shaft 7 penetrates through the bearing seat 5 to be connected with a central mounting hole of the crank disc 6, symmetrical connecting rod mounting through holes and balance weight mounting holes are formed in the crank disc 6, the connecting rod mounting through holes are connected with one end of a connecting rod 8, the other end of the connecting rod 8 is connected with a mounting hole in the sliding block 12 through a fastening piece 11, and the sliding block 12, the first guide rail 13 and the second guide rail 14 form a complete moving pair.
The bottom ends of the first guide rail 13 and the second guide rail 14 are provided with moving blocks, the moving blocks can slide in the tracks of the guide rail support columns 10, the centers of the moving blocks are provided with threaded through holes, the shafts of the adjusting handles 9 are provided with corresponding threads, and the adjusting handles 9 are installed in the central threaded through holes of the moving blocks. In order to achieve the purpose of adjusting the gap between the sliding block 12 and the sliding rail, the first guide rail 13 and the guide rail support column 10 are relatively fixed, the adjusting handle 9 can be rotated to enable the moving block of the second guide rail 14 to move in the track of the guide rail support column 10 through the threaded matching of the adjusting handle 9 and the moving block, so that the distance between the first guide rail 13 and the second guide rail 14 is changed, and the purpose of adjusting the gap of the moving pair is achieved.
And metal long polar plates with corresponding areas are arranged between the metal polar plates 19 and the first guide rail 13 and the second guide rail 14.
The operation method of the invention is as follows:
step 1: ten metal pole plates 19 are sequentially installed on the sliding block 11 through the pole plate fixing piece 20;
step 2: rotating the adjusting handles 9 at two sides to zero the gap between the guide rail and the sliding block;
and step 3: starting a motor, wherein a driving motor 1 drives a sliding block 12 to reciprocate in a groove between a first guide rail 13 and a second guide rail 14 through a rigid coupling 2, a torque sensor 3, a flexible coupling 4, a crank disc 6, an output shaft 7, a connecting rod 8 and a connecting rod mounting block 16;
and 4, step 4: recording data measured by the torque sensor 3 and recording the capacitance value between the metal polar plate 19 and the metal long polar plate on the guide rail;
and 5: transmitting the obtained data to a computer for processing, analyzing the slide block and the motion state in time intervals, and distinguishing the collision and free sliding state of the slide block in the motion process;
step 6: closing the driving motor 1, rotating the adjusting handle 9, and adjusting the gap between the guide rail and the slide block 11 to a proper position;
and 7: repeating the step 3, and recording experimental data under different gap values;
and 8: and comparing the experimental results of different clearance values, and verifying the theoretical result.
The above detailed description is specific to possible embodiments of the present invention, and the embodiments are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the scope of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides a slider position appearance measuring platform based on capacitive displacement sensor principle which characterized in that: the measuring platform comprises a driving motor (1), a rigid coupling (2), a torque sensor (3), an elastic coupling (4), a bearing seat (5), a crank disc (6), an output shaft (7), a connecting rod (8), an adjusting handle (9), a guide rail supporting column (10), a fastener (11), a sliding block (12), a first guide rail (13), a second guide rail (14) and a rack (15);
a rack (15) is arranged in the measuring platform, and a driving motor (1), a torque sensor (3) and a bearing seat (5) are arranged on the rack (15); the driving motor (1) is connected with the torque sensor (3) through the rigid coupling (2), the torque sensor (3) is connected with one end of an output shaft (7) through the elastic coupling (4), the output shaft (7) is connected with a central mounting hole of the crank disc (6), the crank disc (6) is provided with a connecting rod mounting through hole and a counterweight mounting hole which are symmetrical, the connecting rod (8) is connected with the sliding block (12) through the fastening piece (11), and the sliding block (12), the first guide rail (13) and the second guide rail (14) form a complete moving pair;
the bottom ends of the first guide rail (13) and the second guide rail (14) are provided with moving blocks, the moving blocks can slide in the tracks of the guide rail supporting columns (10), and the centers of the moving blocks are provided with threaded through holes; the shaft of the adjusting handle (9) is provided with corresponding threads, and the adjusting handle (9) is arranged in a central thread through hole of the moving block; the first guide rail (13) and the guide rail supporting column (10) are relatively fixed, and the moving block of the second guide rail (14) can move in the track of the guide rail supporting column (10) through the threaded matching of the adjusting handle (9) and the moving block, so that the distance between the first guide rail (13) and the second guide rail (14) is changed;
the sliding block (12) comprises a connecting rod mounting block (16), a top nylon sliding block (17), a bottom metal sliding block (18), a metal pole plate (19) and a pole plate fixing piece (20); a connecting rod mounting block (16) is arranged in the center of the bottom metal sliding block, the connecting rod mounting block (16) penetrates through a top nylon sliding block (17) to be connected with a bottom metal sliding block (18), mounting holes of five metal polar plates (19) are uniformly distributed in the left side and the right side of the nylon sliding block (17), and the metal polar plates (19) are mounted in the mounting holes in the left side and the right side of the top nylon sliding block (17) through polar plate fixing pieces (20);
and metal long polar plates with the same area are arranged between the first guide rail (13), the second guide rail (14) and the metal polar plates (19).
2. The slider pose measurement platform based on the capacitive displacement sensor principle according to claim 1, characterized in that: the measuring platform further comprises a connecting rod mounting block (16), a nylon sliding block (17), a metal sliding block (18), a metal pole plate (19) and a pole plate fixing piece (20).
3. The slider pose measurement platform based on the capacitive displacement sensor principle according to claim 1, characterized in that: the rigid coupling (2) is an Oldham coupling.
4. The slider pose measurement platform based on the capacitive displacement sensor principle according to claim 1, characterized in that: the elastic coupling (4) is an elastic slider coupling.
5. The slider pose measurement platform based on the capacitive displacement sensor principle according to claim 1, characterized in that: the first guide rail (13) is a left guide rail of a moving pair and is connected with a guide rail support column (10) through a bottom moving block of the first guide rail.
6. The slider pose measurement platform based on the capacitive displacement sensor principle according to claim 1, characterized in that: the second guide rail (14) is a right guide rail of the sliding pair and is connected with the guide rail support column (10) through a bottom moving block of the second guide rail.
7. The slider pose measurement platform based on the capacitive displacement sensor principle according to claim 1, characterized in that: the fastening piece (11) is a shaft sleeve and a pin shaft with different diameters.
8. The slider pose measurement platform based on the capacitive displacement sensor principle according to claim 1, characterized in that: the operation method of the measuring platform comprises the following steps:
step 1: ten metal pole plates 19 are sequentially installed on the sliding block 11 through the pole plate fixing piece 20;
step 2: rotating the adjusting handles 9 at two sides to zero the gap between the guide rail and the sliding block;
and step 3: starting a motor, wherein a driving motor 1 drives a sliding block 12 to reciprocate in a groove between a first guide rail 13 and a second guide rail 14 through a rigid coupling 2, a torque sensor 3, a flexible coupling 4, a crank disc 6, an output shaft 7, a connecting rod 8 and a connecting rod mounting block 16;
and 4, step 4: recording data measured by the torque sensor 3 and recording the capacitance value between the metal polar plate 19 and the metal long polar plate on the guide rail;
and 5: transmitting the obtained data to a computer for processing, analyzing the slide block and the motion state in time intervals, and distinguishing the collision and free sliding state of the slide block in the motion process;
step 6: closing the driving motor 1, rotating the adjusting handle 9, and adjusting the gap between the guide rail and the slide block 11 to a proper position;
and 7: and (5) repeating the step (3) and recording experimental data under different clearance values.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110535613.5A CN113155006B (en) | 2021-05-17 | 2021-05-17 | Slider position appearance measuring platform based on capacitance displacement sensor principle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110535613.5A CN113155006B (en) | 2021-05-17 | 2021-05-17 | Slider position appearance measuring platform based on capacitance displacement sensor principle |
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| Publication Number | Publication Date |
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| CN113155006A true CN113155006A (en) | 2021-07-23 |
| CN113155006B CN113155006B (en) | 2022-06-07 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2811951Y (en) * | 2005-06-23 | 2006-08-30 | 上海交通大学 | Test bench for measuring parameters of crank slider mechanism |
| CN102230863A (en) * | 2011-04-12 | 2011-11-02 | 河南科技大学 | Flexible loading system of friction and wear testing machine |
| CN107167312A (en) * | 2016-03-08 | 2017-09-15 | 天津爱安特精密机械有限公司 | A kind of Linear transmission product fatigue life test machine |
| CN111366361A (en) * | 2020-03-30 | 2020-07-03 | 哈尔滨工业大学（威海） | Adjustable multi-gap gear-link mechanism dynamics experiment simulation system |
-
2021
- 2021-05-17 CN CN202110535613.5A patent/CN113155006B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2811951Y (en) * | 2005-06-23 | 2006-08-30 | 上海交通大学 | Test bench for measuring parameters of crank slider mechanism |
| CN102230863A (en) * | 2011-04-12 | 2011-11-02 | 河南科技大学 | Flexible loading system of friction and wear testing machine |
| CN107167312A (en) * | 2016-03-08 | 2017-09-15 | 天津爱安特精密机械有限公司 | A kind of Linear transmission product fatigue life test machine |
| CN111366361A (en) * | 2020-03-30 | 2020-07-03 | 哈尔滨工业大学（威海） | Adjustable multi-gap gear-link mechanism dynamics experiment simulation system |
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| CN113155006B (en) | 2022-06-07 |
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