阅读说明：本技术 一种静摩擦角度测试仪 (Static friction angle tester ) 是由 白仲文 李祝斌 梁展维 何炎新 于 2019-11-26 设计创作，主要内容包括：本发明公开了一种静摩擦角度测试仪,包括底板和载物板,所述底板顶部外壁上固定连接有步进电机,所述步进电机输出端固定连接有联轴器,所述联轴器连接有蜗杆轴,所述蜗杆轴远离联轴器一端固定连接有蜗杆轴隔套,所述蜗杆轴外壁上固定连接有蜗杆,所述蜗杆上方通过齿轮啮合连接有蜗轮,所述蜗轮内部固定连接有从动长轴,本发明当样品瓶开始下滑至两对射光栅之间时,瞬间就会有信号传送控制电机停止旋转,保证测量值的精确,通过大小不同的两个圆柱齿轮作用,刻度盘上显示的角度值是测量平台旋转角度的4倍,使显示角度的分辨值更小,记录更精确。(The invention discloses a static friction angle tester, which comprises a bottom plate and an object carrying plate, wherein a stepping motor is fixedly connected to the outer wall of the top of the bottom plate, a coupler is fixedly connected to the output end of the stepping motor, a worm shaft is connected to the coupler, a worm shaft spacer sleeve is fixedly connected to one end, far away from the coupler, of the worm shaft, a worm is fixedly connected to the outer wall of the worm shaft, a worm wheel is connected to the upper part of the worm through gear meshing, and a driven long shaft is fixedly connected to the inner part of the worm wheel.)

1. The static friction angle tester comprises a bottom plate (12) and a carrying plate (1), and is characterized in that a stepping motor (20) is fixedly connected to the outer wall of the top of the bottom plate (12), a coupler (22) is fixedly connected to the output end of the stepping motor (20), a worm shaft (21) is connected to the coupler (22), a worm shaft spacer sleeve (23) is fixedly connected to one end, away from the coupler (22), of the worm shaft (21), a worm (15) is fixedly connected to the outer wall of the worm shaft (21), a worm wheel (16) is connected to the upper portion of the worm (15) through gear meshing, a driven long shaft (14) is fixedly connected to the inner portion of the worm wheel (16), the driven long shaft (14) is movably sleeved on two vertical plates on the bottom plate (12), lifting plates (13) are fixedly arranged at two ends of the bottom of the carrying plate (1) respectively, and U-shaped grooves are formed in the positions, close to the, a deflector rod (17) is arranged on the outer ring of the worm wheel (16), the deflector rod (17) is fixedly connected with the worm wheel (16) and extends towards the two ends to be in contact with the U-shaped groove of the lifting plate (13), a baffle (2) is fixedly arranged on one side of the outer wall of the top of the carrying plate (1), a filler strip (3) is fixedly arranged on the top of the carrying plate (1), a gap is reserved between the filler strip (3) and the carrying plate (1), the top of the filler strip (3) is fixedly provided with a correlation grating (4), a sliding rod (5) is fixedly arranged at the bottom of the outer wall at one side of the filler strip (3), the sliding rod (5) is connected with a limiting strip (6) in a sliding manner, the position of the limit strip (6) is parallel to the position of the baffle (2), one end of the limit strip (6) is connected with a locking screw (7) through a thread, the outer wall of the top of the object carrying plate (1) is far away from one side of the baffle plate (2) and is fixedly provided with a first level bubble (8).

2. The static friction angle tester according to claim 1, wherein one end of the driven long shaft (14) is sleeved with a second cylindrical gear (28) and a gear positioning ring (25) respectively, the gear positioning ring (25) is arranged outside the second cylindrical gear (28), one side of the outer wall of the top of the bottom plate (12) is fixedly connected with two vertical plates, a gear shaft (26) is connected with the two vertical plates, one side of the gear shaft (26) is sleeved with a first cylindrical gear (27), the first cylindrical gear (27) is meshed with the second cylindrical gear (28) through a gear, the ratio of the number of teeth of the first cylindrical gear (27) to the number of teeth of the second cylindrical gear (28) is 1:4, one end of the gear shaft (26) far away from the first cylindrical gear (27) is fixedly connected with a dial spacer (24) and a dial (30) respectively, and the dial spacer (24) is arranged inside the dial (30), and a pointer (31) is fixedly arranged above the dial (30).

3. The static friction angle tester according to claim 1, wherein a supporting plate is fixedly connected to one side of the outer wall of the top of the bottom plate (12), a horizontal adjusting screw (29) is fixedly mounted on the supporting plate through a bolt, and the top of the horizontal adjusting screw (29) is attached to the outer wall of the bottom of the carrying plate (1) when the carrying plate (1) is reset.

4. The static friction angle tester according to claim 1, wherein four universal adjusting supporting feet (11) are fixedly installed on the outer wall of the bottom plate (12), and the four universal adjusting supporting feet (11) are respectively located at four corners of the outer wall of the bottom plate (12).

5. The static friction angle tester according to claim 1, wherein the carrier plate (1) is provided with an angle calibration block (9), and a second level bubble (10) is fixedly mounted on the outer wall of the top of the angle calibration block (9).

6. The static friction angle tester according to claim 1, wherein the output end of the correlation grating (4) is electrically connected with the stepping motor (20).

7. The static friction angle tester according to claim 2, wherein an upper limit travel switch (18) and a lower limit induction switch (19) are fixedly connected to side vertical plates fixedly connected to the bottom plate (12), the travel switches (18) and the induction switches (19) are electrically connected to the stepping motor (20), an upper limit induction switch and a lower limit induction switch are arranged on two vertical plates on the outer wall of the top of the bottom plate (12), the lower limit induction switch is arranged below the lower limit induction switch, and the upper limit induction switch is arranged above the upper limit induction switch; when the upper limit inductive switch or the lower limit inductive switch fails, the side plate (13) can correspondingly press the upper limit travel switch or the lower limit travel switch when continuously descending or descending, so that a working power supply of the stepping motor is cut off, and double insurance is formed.

8. The static friction angle tester according to claim 1, wherein the side vertical plate fixedly connected to the bottom plate (12) is fixedly connected with an angle encoder, a rotating shaft of the angle encoder is connected with the driven long shaft (14), and an output end of the angle encoder is electrically connected with the circuit board.

Technical Field

The invention relates to the technical field of angle testers, in particular to a static friction angle tester.

Background

The friction tester is suitable for the friction-resistant life test of the surfaces and printing surfaces of various products and mainly comprises a sample carrying table, a friction head and a power device, wherein the sample carrying table is used for mounting a sample to be tested, the friction head is positioned above the sample to be tested, a friction medium on the friction head is kept in contact with the surface of the sample to be tested, a driving rod of the power device drives the friction head to reciprocate on the surface of the sample, and the friction tester is generally only provided with one friction head and can only test one group of samples.

And some friction test appearance that exist on the market at present all are used for measuring film thin slice or some cubic object surface static friction coefficient mostly, rarely can carry out the equipment of accurate measurement to packing container surface smoothness such as glass bottle, plastic bottle and aluminium can and static friction coefficient, and current measuring apparatu is mostly through manual measurement moreover, the accuracy is lower, static friction coefficient and inclination calculate inconveniently, manual measurement upset speed can not keep the uniform velocity when the upset objective table in addition, the error is great, can not guarantee the levelness of objective table simultaneously. Therefore, it is desirable to design a static friction angle tester to solve the above problems.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a static friction angle tester.

In order to achieve the purpose, the invention adopts the following technical scheme:

a static friction angle tester comprises a bottom plate and a carrying plate, wherein a stepping motor is fixedly connected to the outer wall of the top of the bottom plate, the output end of the stepping motor is fixedly connected with a coupler, the coupler is connected with a worm shaft, one end, far away from the coupler, of the worm shaft is sleeved with a worm shaft spacer sleeve, a worm is fixedly connected to the outer wall of the worm shaft, a worm wheel is connected to the upper part of the worm through gear meshing, a driven long shaft is fixedly connected to the inner part of the worm wheel and movably sleeved on two vertical plates of the bottom plate, lifting plates are respectively and fixedly arranged at two ends of the bottom of the carrying plate, U-shaped grooves are formed in positions, close to the bottom, of the two lifting plates, a shifting rod is arranged on the outer ring of the worm wheel, the shifting rod is fixedly connected with the worm wheel and extends towards the two ends, carry thing board top fixed mounting to have the filler strip, and leave the clearance in the middle of filler strip and the year thing board, filler strip top fixed mounting has the correlation grating, filler strip one side outer wall bottom fixed mounting has the slide bar, slide bar sliding connection has spacing, and spacing is parallel with the baffle position, there is locking screw spacing one end through threaded connection, it has first air level to carry thing board top outer wall to keep away from baffle one side fixed mounting.

Furthermore, a second cylindrical gear and a gear positioning ring are respectively sleeved at one end of the driven long shaft, the gear positioning ring is arranged on the outer side of the second cylindrical gear, two vertical plates are fixedly connected to one side of the outer wall of the top of the bottom plate, a gear shaft is connected to the two vertical plates, a first cylindrical gear is sleeved at one side of the gear shaft, the first cylindrical gear is meshed with the second cylindrical gear through gears, the tooth number ratio of the first cylindrical gear to the second cylindrical gear is 1:4, a dial spacer bush and a dial are respectively fixedly connected to one end, far away from the first cylindrical gear, of the gear shaft, the dial spacer bush is arranged on the inner side of the dial, and a pointer is fixedly installed above the dial.

Furthermore, a supporting plate is welded on one side of the outer wall of the top of the bottom plate, a horizontal adjusting screw is fixedly mounted on the supporting plate through a bolt, and the top of the horizontal adjusting screw is attached to the outer wall of the bottom of the loading plate when the loading plate is reset.

Furthermore, four universal adjusting supporting legs are fixedly mounted on the outer wall of the bottom plate and are respectively located at four corners of the outer wall of the bottom plate.

Furthermore, an angle calibration block is arranged on the object carrying plate, and a second level bubble is fixedly arranged on the outer wall of the top of the angle calibration block.

Furthermore, the output end of the correlation grating is electrically connected with the stepping motor.

Further, dial one end fixedly connected with travel switch and inductive switch are kept away from to the gear shaft, and travel switch and inductive switch all are electric connection with step motor, are equipped with on two risers of bottom plate top outer wall and are equipped with upper limit inductive switch and lower limit inductive switch, and this lower limit inductive switch's below position is equipped with at lower limit travel switch, upper limit inductive switch's top position is equipped with at upper limit travel switch, and when upper limit inductive switch or lower limit inductive switch were out of order, the curb plate lasted down or down the corresponding roof pressure of ability on upper limit travel switch or lower limit travel switch, thereby cut off step motor's working power supply, formed double insurance.

Furthermore, the side vertical plate fixedly connected to the bottom plate is fixedly connected with an angle encoder, a rotating shaft of the angle encoder is connected with the driven long shaft, and an output end of the angle encoder is electrically connected with the circuit board.

The invention has the beneficial effects that:

1. through the correlation grating and the inductive switch that set up, when measuring platform slowly rotated to a certain angle, top sample bottle began the gliding, when being located between two correlation gratings, will have signal transmission control motor to stop rotatory in the twinkling of an eye, and test platform will stop rotatory, guarantees the accuracy of measured value.

2. Through the first cylindrical gear and the second cylindrical gear that set up, when measuring platform rotation angle, through the effect of second cylindrical gear drive first cylindrical gear, the angle value that shows on the calibrated scale is 4 times of measuring platform rotation angle, makes the resolution value of showing the angle littleer, and the record is more accurate.

3. Through the first air level, angle alignment piece and the horizontal adjustment screw that set up, can will carry the thing board to adjust to horizontal angle before the measurement, prevent the measuring platform slope, effectively reduce the error that exists among the measurement process.

4. Through setting up worm wheel and worm, adopt step motor directly to link the worm gear structure, can realize the steady upset of measuring platform through the rotational speed of adjusting the voltage control motor of input, avoid the phenomenon of the faster measuring bottle landing of upset process.

Drawings

Fig. 1 is a schematic structural diagram of a static friction angle tester according to the present invention;

FIG. 2 is a schematic view of an internal structure of a static friction angle tester according to the present invention;

FIG. 3 is a schematic view of a dial rotation structure of the static friction angle tester according to the present invention;

fig. 4 is a schematic view of a worm and worm gear transmission structure of the static friction angle tester provided by the invention.

In the figure: the device comprises a load carrying plate 1, a baffle plate 2, a cushion strip 3, an opposite emission grating 4, a slide rod 5, a limit strip 6, a locking screw 7, a first leveling bubble 8, a calibration block seat 9, a second leveling bubble 10, a universal adjusting supporting foot 11, a bottom plate 12, a lifting plate 13, a driven long shaft 14, a worm 15, a worm wheel 16, a driving rod 17, a travel switch 18, an inductive switch 19, a stepping motor 20, a worm shaft 21, a coupler 22, a worm shaft spacer 23, a dial spacer 24, a gear positioning ring 25, a gear shaft 26, a first cylindrical gear 27, a second cylindrical gear 28, a horizontal adjusting screw 29, a dial 30 and a pointer 31.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1-4, a static friction angle tester comprises a bottom plate 12 and a carrying plate 1, wherein a stepping motor 20 is fixedly connected to the outer wall of the top of the bottom plate 12, a coupler 22 is fixedly connected to the output end of the stepping motor 20, the coupler 22 is connected with a worm shaft 21, a worm shaft spacer 23 is sleeved on one end of the worm shaft 21 away from the coupler 22, a worm 15 is fixedly connected to the outer wall of the worm shaft 21, a worm wheel 16 is connected to the upper side of the worm 15 through gear meshing, a driven long shaft 14 is fixedly connected to the inner part of the worm wheel 16, the driven long shaft 14 is movably sleeved on a vertical plate fixedly connected with the bottom plate 12, lifting plates 13 are respectively and fixedly arranged at two ends of the bottom of the carrying plate 1, U-shaped grooves are arranged at positions close to the bottom ends of the two lifting plates 13, a shift lever 17 is arranged on the outer ring, carry 1 top outer wall one side fixed mounting of thing board to have baffle 2, carry 1 top fixed mounting of thing board to have filler strip 3, and leave the clearance in the middle of filler strip 3 and the thing board of carrying 1, 3 top fixed mounting of filler strip have correlation grating 4, 3 one side outer wall bottom fixed mounting of filler strip has slide bar 5, 5 sliding connection of slide bar have spacing 6, and spacing 6 is parallel with 2 positions of baffle, 6 one end of spacing has locking screw 7 through threaded connection, carry 1 top outer wall of thing board to keep away from 2 one side fixed mounting of baffle and have first air level 8.

Further, carry thing board 1 and rotate through two promotion boards 13 and cup joint at driven long axis 14 to be connected with the spring, spring one end is connected on promotion board 13, and the spring other end is connected on the bottom plate, makes promotion board 13's U-shaped groove and driving lever 17 contact under the spring force effect. When ascending, the motor drives worm wheel 16 anticlockwise rotation to driving lever 17 on the worm wheel 16 rotates in step, drives lifting plate 13 and carries thing board 1 around driven major axis 14 upset upwards, and when descending, the motor drives worm wheel 16 clockwise rotation, thereby drives lever 17 on the worm wheel 16 and breaks away from the U-shaped groove of lifting plate 13, carries thing board 1 and overturns downwards in step under gravity and spring force effect. Until it comes to rest after the leveling screw 29 is hit. Therefore, the horizontal adjusting screw 29 stops at the same horizontal position when the object carrying plate 1 descends and collides each time, and the motor rotation stop influence is avoided, so that the test is more accurate.

Furthermore, one end of the driven long shaft 14 is respectively sleeved with a second cylindrical gear 28 and a gear positioning ring 25, and the gear positioning ring 25 is arranged outside the second cylindrical gear 28, one side of the outer wall of the top of the bottom plate 12 is fixedly connected with two vertical plates, and the two vertical plates are connected with a gear shaft 26, one side of the gear shaft 26 is sleeved with a first cylindrical gear 27, the first cylindrical gear 27 and the second cylindrical gear 28 are meshed through gears, the ratio of the number of teeth of the first cylindrical gear 27 to the number of teeth of the second cylindrical gear 28 is 1:4, one end of the gear shaft 26, far away from the first cylindrical gear 27, is fixedly connected with a dial spacer 24 and a dial 30 respectively, and the dial spacer 24 is arranged at the inner side of the dial 30, and the pointer 31 is fixedly arranged above the dial 30, so that the angle value displayed on the dial is 4 times of the rotating angle of the measuring platform, the resolution value of the displayed angle is smaller, the record is more accurate, and the indication value on the dial 30 is easier to read.

Further, bottom plate 12 top outer wall one side fixedly connected with backup pad, and have horizontal adjustment screw 29 through bolt fixed mounting in the backup pad, and horizontal adjustment screw 29 top and the laminating of year thing board 1 bottom outer wall when carrying thing board 1 and reseing, make to carry thing board 1 to be located the horizontal angle through adjusting horizontal adjustment screw 29 before the measurement, reduce the error in the measurement process.

Further, bottom plate 12 bottom outer wall fixed mounting has four universal regulation supporting legs 11, and four universal regulation supporting legs 11 are located four corners of bottom plate 12 bottom outer wall respectively, can make whole measuring device keep balance through adjusting four universal regulation supporting legs 11, avoid in the measurement process device shake and measuring device out of level to measuring accuracy bring the error.

Furthermore, the object carrying plate 1 is provided with an angle calibration block 9, and a second level bubble 10 is fixedly mounted on the outer wall of the top of the angle calibration block 9, so that the device corner angle can be calibrated, and the accuracy of measurement is guaranteed.

Further, the output end of the correlation grating 4 is electrically connected to the stepping motor 20. When a measurement sample slides down to the middle of the two correlation gratings 4, a signal transmission control circuit triggers the motor to stop rotating instantly, the test platform stops rotating, and the accuracy of a measured value is guaranteed.

Furthermore, one end of the gear shaft 26, which is far away from the dial 30, is fixedly connected with a travel switch 18 and an induction switch 19, the travel switch 18 and the induction switch 19 are both electrically connected with a stepping motor 20, when the object carrying plate 1 descends, the object carrying plate stops after touching a horizontal adjusting screw 29, and when the motor drives a shifting rod 17 to continue to rotate and approach the induction switch 19, the stepping motor 20 stops rotating, so that the object carrying plate 1 is accurately restored to a horizontal angle adjusted before measurement, an upper limit induction switch and a lower limit induction switch are arranged on two vertical plates on the outer wall of the top of the bottom plate (12), a lower limit travel switch is arranged below the lower limit induction switch, and an upper limit travel switch is arranged above the upper limit induction switch; when the upper limit inductive switch or the lower limit inductive switch fails, the side plate 13 can be correspondingly pressed on the upper limit travel switch or the lower limit travel switch when continuously descending or descending, so that a working power supply of the stepping motor is cut off, and double insurance is formed.

The working principle is as follows: when the static friction angle tester is used, before the measurement is started, a horizontal adjusting screw 29 is adjusted, an objective table 1 is in a horizontal position by observing a first air level 8, meanwhile, an angle calibration block 9 can be used for carrying out angle calibration on the rotation angle of the objective table 1, after the horizontal and angle calibration is finished, 3 test samples are placed between a baffle 2 and a limiting strip 6 on the objective table 1 in a conical shape, the position of the limiting strip 6 on a sliding rod 5 is adjusted, the limiting strip 6 is tightly attached to the test sample placed below, a locking screw 7 is screwed down, a starting button on the outer wall of the tester is pressed, a stepping motor 20 starts to rotate after being electrified, a coupler 22 fixed on the output end of the stepping motor 20 and a worm shaft 21 and the stepping motor 20 synchronously rotate, a worm 15 fixedly connected to the worm shaft 21 synchronously rotates to drive a worm wheel 16 to rotate, a deflector rod 17 arranged on the worm wheel 16 stirs two lifting plates 13 to move upwards, thereby driving the objective table 1 to turn around the driven long shaft 14, when the worm wheel 16 rotates, the driven long shaft 14 fixed on the worm wheel 16 also rotates, and simultaneously the second cylindrical gear 28 fixed at one end of the driven long shaft 14 rotates synchronously, and the first cylindrical gear 27 meshed with the second cylindrical gear 28 through the gear also rotates, and simultaneously drives the gear shaft 26 and the dial 30 to rotate, when the objective table 1 inclines a certain angle, the test sample at the top starts to slide downwards, when the test sample slides downwards to a position between the two correlation gratings 4, a signal is instantly generated to control the stepping motor to stop rotating, and simultaneously the worm 15, the worm wheel 16 and the shaft 14 stop rotating, the first cylindrical gear 27, the second cylindrical gear 28 and the dial 30 also stop rotating, the angle value indicated by the pointer 31 on the dial 30 is read, after the measurement is completed, the reset button is pressed, the objective table 1 falls down stably, when the objective table 1 falls to a horizontal angle, the motor drives the shift lever 17 to continue rotating and approach the trigger inductive switch 19, the stepping motor 18 stops rotating, and the measurement is finished.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.