CN110470260B - Measuring head lifting device of portable altimeter - Google Patents
Measuring head lifting device of portable altimeter Download PDFInfo
- Publication number
- CN110470260B CN110470260B CN201910735356.2A CN201910735356A CN110470260B CN 110470260 B CN110470260 B CN 110470260B CN 201910735356 A CN201910735356 A CN 201910735356A CN 110470260 B CN110470260 B CN 110470260B
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- height
- measuring head
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- 238000000034 method Methods 0.000 claims abstract description 16
- 230000033001 locomotion Effects 0.000 claims abstract description 8
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 238000004804 winding Methods 0.000 claims description 5
- 239000004677 Nylon Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 241001422033 Thestylus Species 0.000 claims description 2
- 238000004026 adhesive bonding Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 239000012774 insulation material Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 239000000523 sample Substances 0.000 claims 5
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 238000013016 damping Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
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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
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/22—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring angles or tapers; for testing the alignment of axes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
- Length-Measuring Instruments Using Mechanical Means (AREA)
Abstract
The invention provides a measuring head lifting device of a portable height gauge, which comprises a height gauge mounting ring, a set screw, a central gear, two screws, two wire wheel gears, a screw bracket, a measuring head and a wire rope. The driving central gear drives the wire wheel gears with two symmetrical ends to rotate and wind, and the operation of lifting the measuring head is finished. In the process of lifting the measuring head, the friction damping in the transmission device overcomes the elastic force of the measuring head compression spring of the height gauge, so that the measuring head stays at any position, no impact is generated when the measuring head contacts a measured workpiece, and the measuring accuracy is ensured. The device has a simple structure, the tension of the cord is equal in the lifting process of the measuring head, and the direction of the cord is consistent with the movement direction of the measuring head, so that no lateral moment is generated, the central gear and the cord have heat-insulating performance, and the temperature of hands is prevented from being transmitted to a measuring system; the device has the advantages of low cost, high lifting efficiency, stable movement, no impact in the measuring process and the like, and is suitable for measuring the height, the parallelism and the position of parts with large measuring range, large groove depth or large hole depth structures.
Description
Technical Field
The invention belongs to the technical field of precision testing, and relates to a measuring head lifting device for a portable altimeter.
Background
The height gauge is a length measuring instrument with a wide measuring range (12.5-100 mm), and is widely applied to the fields of height, parallelism, position measurement and the like of precise workpieces. In the measuring process, the measuring head of the portable height gauge needs to be lifted, then the measuring head falls back under the action of the spring in the height gauge, and the workpiece is tightly pressed by the acting force of about 1N to implement measurement. The existing measuring head lifting mechanism of the portable height gauge has several modes such as a vacuum pump type, a pressing lever type, a portable type and the like. The vacuum pump altimeter measuring head lifting mechanism has the advantages of high measuring head lifting precision, no lateral force on the measuring head, small influence of human body temperature on the measuring result and the like, but the mechanism has a complex structure and high cost, and is not suitable for altimeters with a large range of more than 50 mm. The pressing lever type measuring head lifting mechanism is only suitable for lifting a small-range height measuring head below 25mm due to the limited pressing stroke. Although the portable measuring head lifting mechanism is simple in structure, lateral force is easily generated in the measuring head lifting process, the measuring accuracy of the height gauge is affected, and the measuring rod can be bent in serious cases to cause damage to the height gauge; the hand is too close to the measuring position in the lifting process of the portable measuring head, and the temperature of the human body can reduce the accuracy of the measuring result. In addition, the portable measuring mechanism is not suitable for measuring the heights of parts with large groove depths and large hole depth structures due to the relationship of operating space.
Disclosure of Invention
In order to solve the problems of the existing portable altimeter, the invention provides a measuring head lifting device for the portable altimeter, which is characterized by comprising the following components: the height gauge comprises a height gauge mounting ring, a set screw, a central gear, two screws, two wire wheel gears, a screw bracket, a measuring head and a wire rope;
the height meter mounting ring is a revolving body structure with a hole, an inner hole at the large end of the height meter mounting ring is in clearance fit with the height meter clamping cylinder, and the size of the inner hole at the small end is larger than the sum of the diameter of the measuring rod and the diameter of two times of the cord;
the screw bracket is a zigzag stretching body, the middle of the screw bracket is provided with a hole and is matched with the outer diameter of the small end of the height meter mounting ring, the size of the upper end of the screw bracket is larger than the diameter of the large end of the height meter mounting ring, and a formed boss is used for positioning the bottom surface of the central gear; the screw bracket and the height meter mounting ring are fixed together through gluing or screw connection, a through hole with the diameter larger than that of the cord is arranged at the small end of the height meter mounting ring along the radial direction, the through hole coaxially extends and penetrates through the screw bracket along the symmetry line of the screw bracket; a middle opening of the screw bracket is matched with the outer cylindrical surface of the small end of the height meter mounting ring; two threaded holes are symmetrically formed in two ends of the screw support, and thread parameters are consistent with those of the thread in the gear of the thread wheel; the axis of the threaded hole is the rotation axis of the two symmetrical line wheel gears;
the central gear is arranged on the cylindrical surface at the large end of the height gauge mounting ring and is in clearance fit with the cylindrical surface at the large end of the height gauge mounting ring, so that the central gear can freely rotate relative to the height gauge mounting ring and has certain rotation precision;
the measuring head is provided with a through hole with the diameter larger than that of the wire rope along the radial direction, one section of the wire rope is fixed on one wire wheel gear, and the other end of the wire rope is fixed on the wire wheel gear on the other side through one measuring hole of the threaded support and the height meter mounting ring, the measuring head through hole, the threaded support and the other measuring hole of the height meter mounting ring respectively;
one end of the wire wheel gear is a gear which is used for meshing transmission with the central gear; the other end is a wire wheel used for winding wires; the center of the gear of the wire wheel is a threaded hole and is used for screwing and driving with a screw; a small hole with the diameter larger than that of the cord is arranged from the junction of the wire wheel part and the gear part to the upper end face of the wire wheel gear and is used for connecting the cord; under the effect of screw thread, can follow screw axis direction motion at the line wheel gear rotation in-process, ensure that line wheel gear wire winding in-process is not overlapped and is interfered to improve the stability that the gauge head promoted.
Further, the thread pitch of the thread of the reel gear is equal to or larger than the diameter of the wire rope.
Further, the distance between the axes of the two threaded holes is 0.05-0.1 mm greater than the sum of the pitch circle diameter of the gear wheel and the pitch circle diameter of the central gear.
Further, the size of the inner hole of the small end of the height meter mounting ring is larger than the sum of the diameter of the measuring rod and the diameter of the double-time cord rope by 0.1-0.5 mm.
Furthermore, the size of the upper end of the screw support is 3-6 mm larger than the diameter of the large end of the height meter mounting ring.
Furthermore, the central gear is a small module gear with a module less than 1 mm.
Furthermore, the line wheel gear is a small module gear with a module smaller than 1 mm.
Furthermore, the central gear is in clearance fit with the cylindrical surface of the large end of the height gauge mounting ring by 0.05-0.1 mm.
Furthermore, the sun gear is made of nylon or other plastic materials with heat insulation performance, so that the temperature of a human hand is prevented from being transmitted to the measuring device; the soft high-strength heat insulation material with the diameter of 0.2-0.5 mm is selected as the cord.
The measuring head lifting device for the portable height gauge has the beneficial effects that the measuring head lifting device for the portable height gauge is invented, and the measuring head lifting operation is completed by manually driving the central gear to drive the wire wheel gears with two symmetrical ends to rotate and wind. In the process of lifting the measuring head, the friction damping in the transmission device overcomes the elastic force of the measuring head compression spring of the height gauge, so that the measuring head can stay at any position, and the measuring head does not have any impact when contacting a measured workpiece, thereby ensuring the measuring accuracy. The device has a simple structure, the tension of the cord is equal in the lifting process of the measuring head, and the direction of the cord is consistent with the movement direction of the measuring head, so that no lateral moment is generated, the central gear and the cord have heat-insulating performance, and the temperature of hands is prevented from being transmitted to a measuring system; in conclusion, the measuring head lifting device has the advantages of simple structure, low cost, high lifting efficiency, stable movement, no impact in the measuring process and the like, is suitable for measuring the height, parallelism and position of parts with large measuring range, large groove depth or large hole depth structures, and has good market application prospect and popularization value.
Drawings
Fig. 1 is a schematic diagram of a measuring head after maximum lifting.
Fig. 2 is a top view of the stylus lifting apparatus.
FIG. 3100 mm travel gauge head release diagram.
In the figure: 1, an altimeter mounting ring; 2, tightening the set screw; 3 an altimeter; 4 a sun gear; 5, a wire wheel gear A; 6, a screw A; 7, a wire rope; 8, a screw bracket; 9, measuring a head; 10 a line wheel gear B; 11 screw B.
Detailed Description
The specific implementation method of the invention is illustrated by taking a height meter with the diameter of 25mm, the measuring range of 100mm and the diameter of a measuring rod of 5mm as an example.
The module of the central gear 4, the pulley gear A5 and the pulley gear B10 is 0.5mm, and the number of teeth of the central gear 4 is z1Number of teeth z of reel2The height of the gear wheel is 10mm, the height of the gear part and the height of the gear wheel part are respectively 5mm, the diameter of the gear wheel is 6.4mm, the threaded hole of the gear wheel is M4, and the threaded hole isThe pitch is 0.7 mm; the height of the sun gear is 6 mm.
According to the maximum stroke of the height gauge 3, the measuring head with the stroke of 100mm can be lifted by winding 5 circles of the gear wheel gear of the line wheel, and according to the transmission ratio of the central gear 4 and the gear wheel of the line wheel, the central gear 4 only needs to rotate 1.25 circles to realize that the measuring head 9 moves 100mm, so that the lifting efficiency of the device is high. According to the transmission ratio, the distance of the movement of the wire wheel gear 5 along the axis direction in the rotation process is 3.5mm, when the height measuring head 9 is completely extended out, the bottom surface of the wire wheel gear contacts the upper surface of the threaded hole of the threaded support 8, so that the upper surface of the wire wheel gear is 2.25mm lower than the upper surface of the midline gear 4; when the measuring head 9 is lifted by 100mm, the central gear 4 drives the gear wheel to rotate by about 5 circles and moves by 3.5mm along the axial direction of the screws A, B6 and 11. The effective length of the wire rope 7 is reasonably selected, so that when the measuring head 9 completely extends out, the wire rope 7 is in a loose state, and the measuring head 9 is prevented from bearing extra tensile force to influence the calibration of the height gauge 3 at the 0 position. The cord 7 is a nylon cord with the diameter of 0.35, and the diameters of the through hole of the measuring head 9, the through hole of the height gauge mounting ring 1 and the through hole of the screw bracket 8 are 0.6 mm; the distance between the two threaded holes on the screw bracket 8 is 40.0-40.1 mm. The thickness of height gauge collar 1 is 2mm, and big end height is 10mm, and the tip height is 3 mm. The width of the threaded support 8 is 12mm, the thickness is 3mm, the length of the upper end is 33mm, and the length of the lower end is 50 mm.
The mounting steps of the measuring head lifting device are as follows:
(1) adhering the height gauge mounting ring 1 and the screw bracket 8 together by using epoxy resin; after 24 hours, drilling a 0.6mm wire rope through hole;
(2) two screws are fixed with the threaded bracket 8;
(3) the two wire wheel gears are respectively screwed on the two screws on the threaded bracket 8;
(4) one end of a wire rope 7 is fixed on a wire wheel gear, and the other end of the wire rope passes through a measuring hole of a threaded support 8 and a height meter mounting ring 1, a through hole of a measuring head 9, the threaded support 8 and another measuring hole of the height meter mounting ring 1 respectively and then is fixed on the wire wheel gear on the other side;
(5) sleeving the central gear 4 on the height gauge mounting ring 1, meshing the central gear with the two gear wheels, observing the tightness of the wire rope 7 when the measuring head 9 is completely extended out, and if the tightness is too loose, adjusting the meshing sequence of a certain gear wheel relative to the central gear 4;
(5) finally, the whole device is mounted on the height gauge 3 and the set screw 2 is tightened.
The using method of the lifting device with the measuring head comprises the following steps:
(1) manually and clockwise rotating the midline gear 4, and lifting the measuring head 9 to a proper position higher than the workpiece;
(2) putting the workpiece into the central gear, manually and slowly rotating the central gear 4 anticlockwise, and continuing to rotate the central gear 4 by a small angle of about 2-3 teeth after the measuring head 9 contacts the measured surface of the workpiece, so that the thread rope 7 is completely loosened, and then data acquisition is carried out.
Claims (9)
1. A gauge head lifting device of a portable altimeter is characterized by comprising: the height gauge comprises a height gauge mounting ring (1), a set screw (2), a central gear (4), two screws, two wire wheel gears, a screw bracket (8), a measuring head (9) and a wire rope (7);
the height meter mounting ring (1) is a revolving body structure with a hole, an inner hole at the large end of the height meter mounting ring is in clearance fit with the height meter clamping cylinder, and the size of the inner hole at the small end is larger than the sum of the diameter of the measuring rod and the diameter of the two-time cord (7);
the screw support (8) is a zigzag stretching body, a hole is formed in the middle of the screw support and is matched with the outer diameter of the small end of the height meter mounting ring (1), the size of the upper end of the screw support is larger than the diameter of the large end of the height meter mounting ring (1), and a formed boss is used for positioning the bottom surface of the central gear (4); the screw bracket (8) and the height meter mounting ring (1) are fixed together through gluing or screw connection, a through hole with the diameter larger than that of the thread rope (7) is arranged at the small end of the height meter mounting ring (1) along the radial direction, the through hole coaxially extends and penetrates through the screw bracket (8) along the symmetry line of the screw bracket (8); a middle opening of the screw bracket (8) is matched with the outer cylindrical surface of the small end of the height meter mounting ring (1); two threaded holes are symmetrically formed in two ends of the screw bracket (8), and thread parameters are consistent with those of the thread in the gear of the reel; the axis of the threaded hole is the rotation axis of the two symmetrical line wheel gears;
the central gear (4) is arranged on a large-end cylindrical surface of the height gauge mounting ring (1) and is in clearance fit with the large-end cylindrical surface of the height gauge mounting ring (1), so that the central gear (4) can freely rotate relative to the height gauge mounting ring (1) and has certain rotation precision, the upper end surface of the screw support is an axial positioning reference of the central gear (4), and the set screw (2) on the height gauge mounting ring (1) is used for limiting the axial movement of the central gear (4) besides fixing the height gauge mounting ring (1);
a through hole with the diameter larger than that of the wire rope (7) is arranged at the radial position of the measuring head (9), one section of the wire rope (7) is fixed on one wire wheel gear, and the other end of the wire rope (7) is fixed on the wire wheel gear at the other side through one measuring hole of the threaded support and the height meter mounting ring (1), the through hole of the measuring head (9), the threaded support and the other measuring hole of the height meter mounting ring (1) respectively;
one end of the wire wheel gear is a gear which is used for being meshed with the central gear (4) for transmission; the other end is a wire wheel used for winding the wire rope (7); the center of the gear of the wire wheel is a threaded hole and is used for screwing and driving with a screw; a small hole with the diameter larger than that of the cord (7) is arranged from the junction of the cord wheel part and the gear part to the upper end surface of the cord wheel gear and is used for connecting the cord (7); under the effect of screw thread, can follow screw axis direction motion among the line wheel gear rotation process, ensure that line wheel gear wire winding in-process is not overlapped and is interfered to improve the stability that gauge head (9) promoted.
2. Gauge head lifting arrangement for a portable altimeter according to claim 1, characterized in that the pitch of the thread of the wheel gear is equal to or greater than the diameter of the wire (7).
3. The probe lift device of portable altimeter as claimed in claim 1, wherein the distance between the axes of the two threaded holes is 0.05-0.1 mm greater than the sum of the pitch diameter of the gear wheel and the pitch diameter of the sun gear (4).
4. The probe lifting device of a portable altimeter according to claim 1, wherein the inner hole size of the small end of the altimeter mounting ring (1) is 0.1-0.5 mm larger than the sum of the diameter of the measuring rod and the diameter of the double-time wire rope (7).
5. The probe lifting device of the portable height gauge according to claim 1, wherein the size of the upper end of the screw bracket (8) is 3-6 mm larger than the diameter of the large end of the height gauge mounting ring (1).
6. Gauge head lifting device for a portable altimeter according to claim 1, characterized in that the central gear (4) is a small module gear with a module less than 1 mm.
7. The stylus lifting apparatus of a portable altimeter of claim 1, wherein the wheel gear is a small module gear having a module of less than 1 mm.
8. The probe lifting device of the portable height gauge according to claim 1, wherein the sun gear (4) is in clearance fit with the cylindrical surface of the large end of the height gauge mounting ring (1) by 0.05-0.1 mm.
9. The probe lift device of portable altimeter as claimed in claim 1, wherein the sun gear is made of nylon or plastic material with heat insulating property to prevent the temperature of human hand from being transferred to the measuring device; the soft high-strength heat insulation material with the diameter of 0.2-0.5 mm is selected as the cord.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910735356.2A CN110470260B (en) | 2019-08-09 | 2019-08-09 | Measuring head lifting device of portable altimeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910735356.2A CN110470260B (en) | 2019-08-09 | 2019-08-09 | Measuring head lifting device of portable altimeter |
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| Publication Number | Publication Date |
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| CN110470260A CN110470260A (en) | 2019-11-19 |
| CN110470260B true CN110470260B (en) | 2020-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910735356.2A Active CN110470260B (en) | 2019-08-09 | 2019-08-09 | Measuring head lifting device of portable altimeter |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU613995A1 (en) * | 1976-11-25 | 1978-07-05 | Центральное Проектно-Конструкторское Бюро По Лифтам Всесоюзного Объединения "Союзлифтмаш" | Lift drive |
| DE3907415A1 (en) * | 1989-03-08 | 1990-09-13 | Protechno Entwicklungsbuero Gm | Thermal printer for identity cards |
| CN102837151A (en) * | 2012-09-18 | 2012-12-26 | 上汽通用五菱汽车股份有限公司 | Ratchet locking type lifting mechanism |
| CN207105435U (en) * | 2017-07-31 | 2018-03-16 | 旭平首饰股份有限公司 | Wax injector lifting structure |
| CN207279567U (en) * | 2017-08-22 | 2018-04-27 | 中铁第四勘察设计院集团有限公司 | A kind of lamp riser for possessing ipc monitor interface and simple cable structure |
| CN108426133B (en) * | 2018-03-20 | 2020-08-18 | 宁波力芯科信息科技有限公司 | Intelligent household wireless charging network communication device |
| CN208732507U (en) * | 2018-09-10 | 2019-04-12 | 南京工业职业技术学院 | A kind of equipment lifting device |
| CN109458019B (en) * | 2018-10-30 | 2020-06-16 | 安徽华星智能停车设备有限公司 | Mechanical type sky parking equipment's lift hoist mechanism |
| CN109443171B (en) * | 2018-11-23 | 2024-02-27 | 麦格纳动力总成(江西)有限公司 | General disc gear M value detection device |
| CN209046142U (en) * | 2018-12-20 | 2019-06-28 | 国网河南省电力公司息县供电公司 | Overhead-groundwire lifter |
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2019
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