Convenient paint film durometer with pencil capable of being rapidly replaced

Abstract

The invention relates to the technical field of testing, in particular to a convenient paint film durometer with a pencil capable of being rapidly replaced. Comprising a shell; the pressing cover is installed on the shell, the shell and the pressing cover are in contact to form symmetrically-distributed sliding cavities, the shell and the pressing cover are both provided with inclined holes, the inclined holes of the shell and the inclined holes of the pressing cover are both used for installing pencils, a first sliding plate is arranged in the sliding cavities formed by the shell and the pressing cover in a sliding mode, and a second sliding plate is arranged in the sliding cavities formed by the shell and the pressing cover. A first sliding plate is installed in the shell, a spring is installed between the first sliding plate and the shell, a rotating wheel is installed on the first sliding plate through a one-way bearing, and the rotating wheel makes contact with the pencil, so that the pencil is conveniently and rapidly replaced; and the translation mechanism is arranged on the shell. Through one-way rotation of the rotating wheel, the position of the pencil can be conveniently and rapidly adjusted, the use convenience is improved, meanwhile, the shell is kept relatively horizontal through rapid adjustment of the pencil, and the accuracy of a test result is guaranteed.

Description

Technical Field

[0001] The present invention relates to the field of testing technologies, and particularly to a portable paint film hardness tester with a pencil that can be quickly replaced. Background Art

[0002] A paint film hardness tester is an instrument used to measure the hardness of a paint film. Common types include pencil hardness testers, pendulum hardness testers, indentation hardness testers, etc. Each type of hardness tester has its specific components and usage methods. Currently, pencil hardness testers are widely used to measure the hardness of paint films due to their advantages such as simple operation, low cost, and intuitive results.

[0003] When using a pencil hardness tester for testing, the tester usually moves the pencil hardness tester manually for the moving test. The pencil in the pencil hardness tester is usually fixed by extrusion with a threaded rod. As the number of tests increases, the lead of the pencil gradually wears out, causing the main body of the pencil hardness tester to tilt, that is, the center of gravity of the pencil hardness tester shifts. This shift will change the extrusion force between the pencil and the object to be tested, affecting the accuracy and consistency of the test results. Therefore, the tester needs to frequently rotate the threaded rod to readjust the fixed position of the pencil to ensure that the extrusion force between the pencil and the object to be tested remains constant. However, this adjustment method is not only cumbersome and laborious but also leads to low efficiency in continuous testing. Summary of the Invention

[0004] To overcome the above drawbacks, the present invention provides a portable paint film hardness tester with a pencil that can be quickly replaced.

[0005] Technical Solution: A portable paint film hardness tester with a pencil that can be quickly replaced, comprising:

[0006] A housing;

[0007] A gland, installed on the housing. The housing and the gland contact to form symmetrically distributed sliding cavities. Both the housing and the gland are provided with inclined holes, and the inclined hole of the housing communicates with the inclined hole of the gland. The inclined holes of the housing and the gland are both used to install a pencil. A first sliding plate is slidably arranged in the sliding cavity formed by the housing and the gland, and a spring is installed between the first sliding plate and the housing. The first sliding plate is installed with a runner through a one-way bearing, and the runner contacts the pencil to facilitate the quick replacement of the pencil;

[0008] A translation mechanism, arranged on the housing, and the translation mechanism is used to translate the housing along the surface of the object to be tested.

[0009] More preferably, the runner is provided with circumferentially distributed barbs for increasing the friction between the runner and the pencil.

[0010] More preferably, the translation mechanism includes:

[0011] A first rotating shaft fixedly connected to the housing;

[0012] A rotating frame rotatably arranged on the first rotating shaft;

[0013] A plurality of rollers with a rectangular distribution, and the plurality of rollers are all rotatably arranged on the rotating frame.

[0014] More preferably, it further includes:

[0015] A second sliding plate slidably arranged on the housing, and a spring is installed between the second sliding plate and the housing;

[0016] An eraser detachably installed on the second sliding plate.

[0017] More preferably, it further includes:

[0018] A first baffle plate slidably arranged on the housing in a limiting manner, and the first baffle plate contacts the eraser, and the first baffle plate is used to separate the eraser from the outside air.

[0019] More preferably, it further includes:

[0020] A pencil sharpener slidably arranged on the housing, and the pencil sharpener is used for shaving the pencil;

[0021] A sliding frame slidably arranged on the housing, and a spring is installed between the sliding frame and the housing. The sliding frame contacts the pencil sharpener and is used for quickly disassembling the pencil sharpener.

[0022] More preferably, a plurality of uniformly distributed chutes are arranged on the pencil sharpener. A second baffle plate is installed in one of the chutes on the pencil sharpener, and the second baffle plate contacts the sliding frame and the lead of the pencil.

[0023] More preferably, it further includes:

[0024] A fixed shell fixedly connected to the rotating frame;

[0025] A second rotating shaft rotatably arranged on the fixed shell, and the center line of the second rotating shaft coincides with the center line of the first rotating shaft. The second rotating shaft is rotatably connected to the first rotating shaft, and a torsion spring is installed between the second rotating shaft and the first rotating shaft;

[0026] A worm gear fixedly connected to the second rotating shaft and located inside the fixed shell;

[0027] A worm rotatably arranged on the fixed shell and meshing with the worm gear.

[0028] More preferably, a pointer is provided on the second rotating shaft, a scale is provided on the fixed housing, and the pointer on the second rotating shaft indicates the scale on the fixed housing, so as to display the torsion force of the torsion spring between the second rotating shaft and the first rotating shaft.

[0029] More preferably, it further includes:

[0030] A fixing plate, fixedly connected to the eccentric position of the first rotating shaft away from the second rotating shaft;

[0031] A limiting plate, fixedly connected to the rotating frame, and the limiting plate contacts the fixing plate.

[0032] The present invention has the following advantages: Through the one-way rotation of the rotating wheel, it is convenient to quickly adjust the position of the pencil, improving its usability. At the same time, the quick adjustment of the pencil keeps the housing always horizontal, ensuring the accuracy of the test results; By setting the symmetrically distributed rollers on the rotating frame, it avoids the tester applying the driving force on the housing, thereby further maintaining the stability of the downward pressure exerted by the housing on the pencil and further improving the accuracy of its measurement results; By using the combined setting of the eraser, pencil sharpener and housing, it is convenient for the tester to quickly cut the pencil and erase the scratches, increasing the convenience of the device and improving its portability; By using the first baffle to block the eraser, the service life of the eraser is extended. By adjusting the position of the second baffle, it is convenient to quickly cut out the pencil lead of a specified length; By infinitely adjusting the torsion force of the torsion spring between the first rotating shaft and the second rotating shaft, the extrusion force between the pencil lead and the object to be tested is changed, that is, the object to be tested is detected with different intensities, improving the applicability of the device. Description of the Drawings

[0033] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0034] Figure 2 is a three-dimensional structural schematic diagram of the present invention with the pressure cover in the open state;

[0035] Figure 3 is a cross-sectional view of the housing and the pressure cover of the present invention;

[0036] Figure 4 is a three-dimensional structural schematic diagram of the eraser and the pencil sharpener of the present invention;

[0037] Figure 5 is a three-dimensional structural schematic diagram of the pencil sharpener and the sliding frame of the present invention;

[0038] Figure 6 is a three-dimensional structural schematic diagram of the pencil sharpener and the second baffle of the present invention;

[0039] Figure 7Cross-sectional view of the first rotating shaft and the fixed housing of the present invention;

[0040] Figure 8 Schematic three-dimensional structure diagram of the fixing plate and the limiting plate of the present invention.

[0041] Among them, the attached drawings include the following reference numerals: 1, housing; 2, gland; 3, first sliding plate; 4, runner; 5, pencil; 6, first rotating shaft; 7, rotating frame; 8, roller; 9, second sliding plate; 10, eraser; 11, first baffle; 12, pencil sharpener; 13, sliding frame; 14, sliding groove; 15, second baffle; 16, fixed housing; 17, second rotating shaft; 18, worm gear; 19, worm; 20, fixing plate; 21, limiting plate. Detailed implementation manners

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the attached drawings of the embodiments will be briefly introduced below. Obviously, the attached drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0043] Embodiment 1: A portable paint film hardness tester with a pencil that can be quickly replaced, as Figures 1 - 4 shown, includes: a housing 1; a gland 2, installed on the housing 1, the housing 1 and the gland 2 are in contact to form symmetrically distributed sliding cavities, the housing 1 and the gland 2 are both provided with inclined holes, and the inclined hole of the housing 1 is communicated with the inclined hole of the gland 2. The inclined holes of the housing 1 and the gland 2 are both used to install a pencil 5. A first sliding plate 3 is slidably arranged in the sliding cavity formed by the housing 1 and the gland 2, and a spring is installed between the first sliding plate 3 and the housing 1. The first sliding plate 3 is installed with a runner 4 through a one-way bearing. The runner 4 is in contact with the pencil 5 to facilitate the quick replacement of the pencil 5; the runner 4 is provided with circumferentially distributed barbs for increasing the friction between the runner 4 and the pencil 5; a translation mechanism is arranged on the housing 1, and the translation mechanism is used to translate the housing 1 along the surface of the object to be measured.

[0044] In the above solution, a level gauge is arranged on the housing 1 (the level gauge is a prior art and not shown in the figure, and it is used to display the horizontal state of the housing 1). The gland 2 is installed on the housing 1 through bolts. The included angle between the inclined hole on the housing 1 and the inclined hole on the gland 2 and the horizontal line is 45°. The housing 1 and the gland 2 form two sliding cavities. There are two first sliding plates 3. The first sliding plate 3 is approximately in the shape of an 'n'. The two first sliding plates 3 are respectively arranged in adjacent sliding cavities. The first sliding plate 3 is installed with a runner 4 through two one-way bearings. The specific structure of the one-way bearing in the figure is not shown (the one-way bearing is a prior art). The working principle of the one-way bearing is the same as that of the ratchet and pawl. Attached Figure 2Schematic diagram of the state when the gland 2 is open, used to observe the mechanism of the first sliding plate 3 and the rotating wheels 4. In the figure, the rotating directions of the two rotating wheels 4 are opposite. The rotation of the two rotating wheels 4 is used to move the pencil 5 located between them downward (as an example, looking down from top to bottom), facilitating the replacement of the pencil 5 to be inserted into the inclined holes of the gland 2 and the housing 1 in the direction from the gland 2 to the housing 1. Figure 2 For example, looking down from top to bottom), it is convenient to replace the pencil 5 and insert it into the inclined holes of the two from the direction of the gland 2 to the housing 1.

[0045] In the initial state, the spring between the first sliding plate 3 and the housing 1 is in a compressed state, and the deformation of the springs connected to the two groups of first sliding plates 3 provides a moving distance for the two rotating wheels 4, facilitating the centering clamping of pencils 5 of different sizes by the two rotating wheels 4, so that the center of gravity of the pencil 5 and the center of gravity of the housing 1 are always on the same vertical plane, maintaining the relative stability of the extrusion force between the pencil 5 and the object to be measured. At the same time, the centering clamping of pencils 5 of different sizes improves the applicability of the device.

[0046] As Figure 1 、 Figure 3 and Figure 4 shown, the translation mechanism includes: a first rotating shaft 6, fixedly connected to the housing 1; a rotating frame 7, the rotating frame 7 is rotatably arranged on the first rotating shaft 6; rollers 8, having a plurality of rectangular distributions, and a plurality of rollers 8 are all rotatably arranged on the rotating frame 7.

[0047] In the above solution, there are four rollers 8 (only for illustration in the figure, and the actual number can be arranged according to the actual size of the housing 1). The four rollers 8 are arranged in an array on the rotating frame 7. A rubber sleeve is provided on the outer side of the roller 8 to increase the friction between it and the object to be measured. When the housing 1 and the four rollers 8 are both in a horizontal state, there is a gap between the upper part of the rotating frame � and the housing 1, facilitating the slight rotation of the housing 1 relative to the rotating frame 7.

[0048] Specific working principle: The tester first fixes the object to be measured on the surface of the test platform (the test platform is a prior art not shown in the figure), then the tester places the device on the test platform, presses the rotating frame 7 by hand to make the four rollers 8 fit the test platform, and then the tester inserts the cut pencil 5 into the inclined holes of the housing 1 and the gland 2. During the process of the pencil 5 passing through the two rotating wheels 4, the two rotating wheels 4 rotate accordingly, and then insert until the tip of the pencil 5 contacts the surface of the test platform. After that, by observing the display of the level, when the housing 1 is in a horizontal state, the tester stops moving the pencil 5 to complete the installation operation of the pencil 5.

[0049] After the pencil 5 is installed, the barbs on the two rotating wheels 4 increase the friction between the two rotating wheels 4 and the pencil 5. Due to the limiting effect of the one-way bearings connected to the rotating wheels 4, the pencil 5 cannot move backward through the two rotating wheels 4. That is, at this time, the pencil 5 remains stationary relative to the two rotating wheels 4. Then, the tester pushes the rotating frame 7 to move. The rotating frame 7 drives parts such as the housing 1, the gland 2, and the pencil 5 to move together through the first rotating shaft 6. During the process of the pencil 5 moving past the object to be tested, due to the gravity of the housing 1, the lead of the pencil 5 makes a scratch on the object to be tested. Subsequently, the tester evaluates the hardness of the paint film on the object to be tested based on the scratch on the object to be tested. During the test, the tester can place weights on the housing 1 to change the extrusion force between the pencil 5 and the object to be tested, thereby simulating the test results under different extrusion forces. During the above measurement process, the tester presses the rotating frame 7 to prevent the driving force applied by the tester to the device from being applied to the housing 1, so that the downward pressure exerted by the housing 1 on the pencil 5 is the sum of its own gravity and the weight of the weights placed on it. At the same time, during the movement of the device, the downward pressure received by the pencil 5 always remains relatively constant, that is, to ensure the accuracy of the test results of the device.

[0050] After multiple measurements, the tester repeats the above adjustment operation on the pencil 5 to make the spirit level on the housing 1 return to the horizontal state again. Subsequently, repeat the above operation to continue testing the remaining objects to be tested. At this time, the quick adjustment of the pencil 5 improves the convenience of use of the device. After the measurement is completed, the tester continues to push the pencil 5 downward to pull out the pencil 5 from between the two rotating wheels 4.

[0051] Embodiment 2: On the basis of Embodiment 1, as Figure 4 shown, it further includes: a second sliding plate 9, slidably arranged on the housing 1, and a spring is installed between the second sliding plate 9 and the housing 1; an eraser 10, detachably installed on the second sliding plate 9.

[0052] In the above solution, the eraser 10 is adhered to the second sliding plate 9. And in the initial state, the spring between the second sliding plate 9 and the housing 1 is in a compressed state. The setting of the eraser 10 facilitates the tester to quickly erase the scratch on the object to be tested, which is convenient for the device to quickly perform multiple measurements on the object to be tested sufficiently, and improves the convenience of use of the device.

[0053] As Figure 1 and Figure 4 shown, it further includes: a first baffle 11, slidably arranged on the housing 1 in a limiting manner, and the first baffle 11 contacts the eraser 10. The first baffle 11 is used to separate the eraser 10 from the outside air.

[0054] In the above solution, when the eraser 10 is not in use, the inspector presses the eraser 10 to retract it into the housing 1. Then, the first baffle 11 is used to block the eraser 10, separating the eraser 10 from the outside air and preventing the eraser 10 from coming into contact with oxygen for a long time, thereby reducing the aging of the eraser 10, that is, extending the service life of the eraser 10.

[0055] As Figures 4 - 6 shown, it further includes: a pencil sharpener 12, slidably arranged on the housing 1, and the pencil sharpener 12 is used for shaving the pencil 5; a sliding rack 13, slidably arranged on the housing 1, and a spring is installed between the sliding rack 13 and the housing 1. The sliding rack 13 is in contact with the pencil sharpener 12 and is used for quickly disassembling the pencil sharpener 12; a plurality of evenly distributed sliding grooves 14 are arranged on the pencil sharpener 12, and a second baffle 15 is installed in one of the sliding grooves 14 on the pencil sharpener 12, and the second baffle 15 is in contact with the sliding rack 13, and the second baffle 15 is in contact with the lead of the pencil 5.

[0056] In the above solution, the pencil sharpener 12 facilitates the inspector to quickly shave the pencil 5, improving the detection efficiency of the device. At the same time, the detachable setting of the pencil sharpener 12 prevents the loss of the pencil sharpener 12. When the pencil sharpener 12 is damaged, the inspector can release the block on the pencil sharpener 12 by pressing the sliding rack 13, and then the inspector can replace it with a new one.

[0057] The second baffle 15 blocks the lead of the pencil 5, controlling the length of the lead of the pencil 5 exposed after shaving by the pencil sharpener 12, preventing the pencil 5 from breaking during work due to the too long lead, thereby improving the stability of the pencil 5 during the working process. At the same time, the second baffle 15 is installed in the sliding grooves 14 at different positions on the pencil sharpener 12, facilitating the device to control the lead length of different models of pencils 5, facilitating the device to quickly shave out the lead of a specified length, improving the convenience of use of the device, and enhancing the applicability of the device. When adjusting the position of the second baffle 15, the inspector first moves the sliding rack 13 and compresses the spring connected to it, and then changes the position of the second baffle 15 and resets the sliding rack 13.

[0058] Embodiment 3: On the basis of Embodiment 2, as Figure 1 、 Figure 4 and Figure 7As shown in the figure, it further includes: a fixed housing 16, fixedly connected to the rotating frame 7; a second rotating shaft 17, rotatably arranged on the fixed housing 16, and the center line of the second rotating shaft 17 coincides with the center line of the first rotating shaft 6. The second rotating shaft 17 is rotatably connected to the first rotating shaft 6, and a torsion spring is installed between the second rotating shaft 17 and the first rotating shaft 6; a worm gear 18, fixedly connected to the second rotating shaft 17 and located inside the fixed housing 16; a worm 19, rotatably arranged on the fixed housing 16 and meshed with the worm gear 18; a pointer is provided on the second rotating shaft 17, a scale is provided on the fixed housing 16, and the pointer on the second rotating shaft 17 indicates the scale on the fixed housing 16, which is used to display the torsion force of the torsion spring between the second rotating shaft 17 and the first rotating shaft 6.

[0059] In the above solution, before the paint film hardness test, the tester first installs the pencil 5 by repeating the above operations. After the installation of the pencil 5 is completed, the tester rotates the worm 19. The rotation of the worm 19 drives the second rotating shaft 17 to rotate counterclockwise (taking Figure 7 as an example) through the worm gear 18. The rotation of the second rotating shaft 17 twists the torsion spring connected thereto. At this time, the torsion force of the torsion spring acts on the first rotating shaft 6 and the housing 1, so that the housing 1 additionally applies a corresponding downward pressure to the pencil 5, that is, controls the pressure between the pencil 5 and the object to be tested, and performs tests on the object to be tested with different intensities. The above stepless adjustment of the torsion force of the torsion spring between the first rotating shaft and the second rotating shaft facilitates the user to quickly and accurately adjust the pressure between the pencil 5 and the object to be tested, and further improves the test accuracy of the device. After the measurement is completed, the tester rotates the first rotating shaft 6 in the reverse direction to reset.

[0060] As Figure 7 and Figure 8 shown in the figure, it further includes: a fixing plate 20, fixedly connected to the eccentric part of the first rotating shaft 6 away from the second rotating shaft 17; a limiting plate 21, fixedly connected to the rotating frame 7, and the limiting plate 21 is in contact with the fixing plate 20.

[0061] In the above solution, the blocking of the fixing plate 20 by the limiting plate 21 facilitates the tester to press the right part of the housing 1 (taking Figure 1 as an example). As the four rollers 8 are in close contact with the test platform, the housing 1 is quickly in a horizontal state. Subsequently, the tester quickly inserts the pencil 5 into the inclined holes of the housing 1 and the pressing cover 2. When the tip of the pencil 5 touches the surface of the test platform, the installation of the pencil 5 is quickly completed. The above settings simplify the use operation of the device, significantly reduce the installation time, improve the work efficiency, and then repeat the above operations to test the object to be tested.

[0062] It should be noted that the above-mentioned preferred embodiments are only used to illustrate the technical concept and features of the present invention. The purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A portable paint film hardness tester with a pencil that can be quickly replaced, characterized in that, Comprising: A housing (1); A gland (2) installed on the housing (1), the housing (1) and the gland (2) being in contact to form symmetrically distributed sliding cavities. Both the housing (1) and the gland (2) are provided with inclined holes, and the inclined hole of the housing (1) communicates with the inclined hole of the gland (2). The inclined holes of the housing (1) and the gland (2) are both used for installing a pencil (5). A first sliding plate (3) is slidably arranged in the sliding cavity formed by the housing (1) and the gland (2), and a spring is installed between the first sliding plate (3) and the housing (1). The first sliding plate (3) is provided with a runner (4) through a one-way bearing, and the runner (4) contacts the pencil (5) to facilitate quick replacement of the pencil (5); A translation mechanism arranged on the housing (1) for translating the housing (1) along the surface of the object to be measured.

2. The portable paint film hardness tester with a pencil that can be quickly replaced according to claim 1, characterized in that, Circumferentially distributed barbs are provided on the runner (4) to increase the friction between the runner (4) and the pencil (5).

3. The portable paint film hardness tester with a pencil that can be quickly replaced according to claim 1, characterized in that The translation mechanism comprises: A first rotating shaft (6) fixedly connected to the housing (1); A rotating frame (7) rotatably arranged on the first rotating shaft (6); Rollers (8) with a plurality of rectangular distributions, and a plurality of the rollers (8) are all rotatably arranged on the rotating frame (7).

4. The portable paint film hardness tester with a pencil that can be quickly replaced according to claim 1, characterized in that It further comprises: A second sliding plate (9) slidably arranged on the housing (1) and a spring is installed between the second sliding plate (9) and the housing (1); An eraser (10) detachably installed on the second sliding plate (9).

5. The portable paint film hardness tester with a pencil that can be quickly replaced according to claim 4, characterized in that It further comprises: A first baffle (11) slidably arranged on the housing (1) in a limiting manner, and the first baffle (11) contacts the eraser (10) to separate the eraser (1) from the outside air.

6. The portable paint film hardness tester with a pencil that can be quickly replaced according to claim 1, characterized in that It further comprises: A pencil sharpener (12) slidably arranged on the housing (1), and the pencil sharpener (12) is used for shaving the pencil (5); A sliding frame (13) slidably arranged on the housing (1) and a spring is installed between the sliding frame (13) and the housing (1). The sliding frame (13) contacts the pencil sharpener (12) for quickly removing the pencil sharpener (12).

7. The portable paint film hardness tester with a pencil that can be quickly replaced according to claim 6, characterized in that, A plurality of uniformly distributed chutes (14) are provided on the pencil sharpener (12). A second baffle (15) is installed in one of the chutes (14) on the pencil sharpener (12), and the second baffle (15) contacts the sliding frame (13), and the second baffle (15) contacts the lead of the pencil (5).

8. The portable paint film hardness tester with a pencil that can be quickly replaced according to claim 3, characterized in that, further comprising: a fixed shell (16), fixedly connected to the rotating frame (7); a second rotating shaft (17), rotatably arranged on the fixed shell (16), and the center line of the second rotating shaft (17) coincides with the center line of the first rotating shaft (6), the second rotating shaft (17) is rotatably connected to the first rotating shaft (6), and a torsion spring is installed between the second rotating shaft (17) and the first rotating shaft (6); a worm wheel (18), fixedly connected to the second rotating shaft (17) and located inside the fixed shell (16); a worm (19), rotatably arranged on the fixed shell (16) and meshed with the worm wheel (18).

9. The portable paint film hardness tester with a pencil that can be quickly replaced according to claim 8, characterized in that, A pointer is provided on the second rotating shaft (17), scales are provided on the fixed shell (16), and the pointer on the second rotating shaft (17) indicates the scales on the fixed shell (16) for displaying the torque magnitude of the torsion spring between the second rotating shaft (17) and the first rotating shaft (6).

10. A portable paint film hardness tester with a pencil that can be quickly replaced according to claim 8, characterized in that, further comprising: a fixing plate (20), fixedly connected to the eccentric position of one end of the first rotating shaft (6) away from the second rotating shaft (17); a limiting plate (21), fixedly connected to the rotating frame (7), and the limiting plate (21) is in contact with the fixing plate (20).

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