Constant-temperature shore durometer
By introducing a constant temperature box and temperature control system into the Shore hardness tester, the error problem of hardness testing in a non-constant temperature environment is solved, and higher-precision hardness measurement is achieved.
Patent Information
- Application Number
- CN202421946661.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-08-12
AI Technical Summary
Existing Shore hardness testers are prone to numerical deviations of 1-2 when testing the hardness of rubber and plastic in a non-constant temperature environment, especially when there is a significant seasonal temperature difference, which affects the detection accuracy.
A Shore hardness tester consisting of a constant temperature box and a temperature control system was designed. The placement platform was heated at a constant temperature by a heating wire, and precise temperature control was performed in combination with a temperature sensor and a temperature-controlled touch screen to ensure the balance of the testing environment.
It effectively reduces the impact of ambient temperature changes on hardness testing and improves the accuracy of rubber and plastic hardness testing, especially the detection accuracy of low hardness materials.
Smart Images
Figure CN223361956U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a constant-temperature Shore hardness tester. Background Art
[0002] Constant-temperature Shore durometers are widely used to measure the hardness of materials such as rubber and plastics. Currently, most Shore durometers in China can only be used in constant-temperature laboratories, which is quite restrictive. The hardness of rubber and plastics can vary significantly with temperature, and seasonal temperature fluctuations can cause errors in Shore hardness testing. Failure to maintain a constant room temperature during Shore hardness testing can result in a 1-2 degree deviation in the hardness value. This effect is particularly significant when measuring the hardness of low-hardness rubber and plastics. Utility Model Content
[0003] The utility model provides a constant temperature Shore hardness tester to solve the above-mentioned technical problems, specifically adopting the following technical solutions:
[0004] A constant temperature Shore hardness tester comprises: a mounting base; a placement platform for placing a material to be tested is provided above the mounting base; a column is also provided above the mounting base; a crossbeam is adjustably installed on the column; a hardness tester clamping rod for installing a hardness tester for pressing the material to be tested to detect the hardness of the material to be tested is slidably installed on the crossbeam in the vertical direction; a fixed load weight is sleeved and installed above the hardness tester clamping rod; a locking screw for locking the installation position of the fixed load weight is installed on the top thread of the hardness tester clamping rod; an operating handle for controlling the lifting and lowering of the hardness tester clamping rod is rotatably installed on the crossbeam; a constant temperature box is provided in the mounting base; a heating wire is provided in the constant temperature box for constant temperature heating of the placement platform above; a temperature control touch screen for parameter setting is also provided on one side of the constant temperature box; a heating circuit of the heating wire is electrically connected to the temperature control touch screen.
[0005] Furthermore, a glass cover is provided above the platform for balancing the temperature of the material to be tested.
[0006] Furthermore, a temperature sensor for detecting the temperature of the placement platform is provided between the glass cover and the placement platform.
[0007] Furthermore, an adjustment component for adjusting the height of the placement platform to adapt to materials to be tested of different thicknesses is provided under the placement platform; the adjustment component includes: a support rod and an adjustment fixing rod; the placement platform is slidably sleeved on the outer periphery of the support rod and the adjustment fixing rod; the adjustment fixing rod is threadedly sleeved with an adjustment nut; the adjustment nut supports and fixes the placement platform from the lower side of the placement platform.
[0008] Furthermore, a support plate is provided on the upper end of the adjusting nut for improving the support stability of the placement platform.
[0009] Furthermore, a first distance sensor for detecting the adjusted height of the placement platform relative to the mounting seat is provided on the lower side of the support plate.
[0010] Furthermore, a positioning rod is provided above the mounting seat for stably supporting the placement platform; the placement platform is sleeved on the outer periphery of the positioning rod; and a positioning nut is threadedly sleeved on the outer periphery of the positioning rod for supporting and positioning the placement platform from the bottom of the placement platform.
[0011] Furthermore, the positioning rod and the adjustment and fixing rod are respectively located on both sides of the support rod.
[0012] Furthermore, a limit screw is provided on the crossbeam for limiting the installation position of the fixed load weight relative to the hardness tester clamping rod; the fixed load weight is sleeved on the outer periphery of the limit screw; and a limit nut is provided on the outer thread of the limit screw for limiting the support of the fixed load weight.
[0013] Furthermore, a second distance sensor for detecting the height of the fixed load weight relative to the crossbeam is provided on the lower side of the limiting nut.
[0014] The utility model is beneficial in that the constant temperature Shore hardness tester provided is added with a constant temperature box structure, which can ensure the temperature balance of the testing environment of the material to be tested placed on the placement platform, thereby controlling the contact temperature of the material to be tested, and can reduce the influence of the change of the ambient temperature on the hardness of the material to be tested, thereby ensuring the hardness detection accuracy of the material to be tested. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0016] Figure 1 is a schematic diagram of a constant temperature Shore hardness tester involved in this application;
[0017] Constant temperature Shore hardness tester 10, mounting base 11, placement platform 12, column 13, beam 14, hardness tester clamping rod 15, fixed load weight 16, locking screw 17, operating handle 18, support part 181, constant temperature box 19, heating wire (not shown), glass cover 20, support rod 21, adjustment fixing rod 22, adjustment nut 23, support plate 24, first distance sensor 25, limit screw 26, limit nut 27, second distance sensor 28, temperature sensor 29, locking bolt 30, temperature control touch screen 31. DETAILED DESCRIPTION
[0018] The following describes in detail embodiments of the present invention. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.
[0019] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.
[0020] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.
[0021] like Figure 1 As shown, a constant temperature Shore hardness tester 10 of the present application includes: a mounting base 11, and a placement platform 12 is provided above the mounting base 11 for placing the material to be tested. A column 13 is also provided above the mounting base 11, and a crossbeam 14 is mounted on the column 13. Specifically, the crossbeam 14 is mounted on the outer periphery of the column 13 through the locking holes formed therein, and then the locking holes are locked with locking bolts 30. In this way, the crossbeam 14 is adjustably mounted on the column 13, thereby facilitating the adjustment of the distance between the durometer and the material to be tested when using different models of durometers, thereby achieving greater versatility.
[0022] A durometer clamping rod 15 is mounted on the crossbeam 14 for sliding movement in the vertical direction. This rod allows for the installation of a durometer, which presses against a material to detect its hardness. The durometer can be mounted to the lower end of the rod 15 by inserting or threading.
[0023] A fixed weight 16 is mounted above the hardness tester clamping rod 15. The size of this fixed weight 16 can be selected based on the specific material being tested. The fixed weight 16 is installed in a removable set, making it easy to replace the fixed weight 16 later. A locking screw 17 is threaded on the top of the hardness tester clamping rod 15 to lock the fixed weight 16 in place, thereby ensuring the stability of the fixed weight 16 and the accuracy of the hardness test of the material being tested.
[0024] The crossbeam 14 is rotatably mounted with an operating handle 18. The operating handle 18 is used to control the lifting of the hardness tester clamping rod 15, that is, the hardness tester is controlled to sink and squeeze the material to be tested by the operating handle 18, thereby detecting the hardness of the material to be tested.
[0025] A constant temperature box 19 is provided in the mounting base 11. A heating wire is provided in the constant temperature box 19 for constant temperature heating of the upper placement platform 12. The working principle of the heating wire is equivalent to the heating principle of an oven. After being powered on, the heating wire is energized through the heating circuit. Since the heating wire is a resistance wire, heat is generated when current flows through the resistance wire. Under the guidance of the constant temperature box 19, the heat is transferred to the upper placement platform 12, thereby heating the circumference of the placement platform 12. As a result, when the constant temperature Shore hardness tester 10 is working, the temperature of the heating platform itself and the surrounding temperature are close to a constant temperature state. This can avoid the seasonal temperature difference from having a significant impact on the Shore hardness test experiment, reduce the detection error, and thus ensure the detection accuracy of rubber, plastic and other test materials, especially low hardness rubber, plastic and other side materials.
[0026] Furthermore, a glass cover 20 is provided above the placement platform 12 to balance the temperature of the material to be tested. The glass material of the glass cover 20 can prevent the placement platform 12 from being overheated, thereby reducing the influence of the temperature of the local support position on the material to be tested. A temperature sensor 29 is provided between the glass cover 20 and the placement platform 12 to detect the detection temperature of the placement platform 12. The detection value of the temperature sensor 29 is used to control the current of the heating circuit of the heating wire to regulate the temperature of the placement platform 12 and the surrounding area of the placement platform 12. In this way, the regulation is more accurate for the room temperature that changes with the temperature of the four seasons. It can also be regulated according to the specific temperature that can make the material to be tested in a structurally stable state. The specific regulation method is mainly based on the experimental purpose.
[0027] A temperature control touch screen 31 is also provided on one side of the constant temperature box for parameter setting. The heating circuit of the heating wire is electrically connected to the temperature control touch screen 31. In this way, parameters such as heating temperature can be input through the temperature control touch screen 31, which is convenient to use.
[0028] Therefore, the above-mentioned constant temperature Shore hardness tester 10 has an additional constant temperature box 19 structure, which can ensure the temperature balance of the testing environment of the material to be tested placed on the placement platform 12, thereby controlling the contact temperature of the material to be tested, and can reduce the impact of changes in ambient temperature on the hardness of the material to be tested, thereby ensuring the hardness detection accuracy of the material to be tested.
[0029] As a specific embodiment, an adjustment component is provided below the placement platform 12 for adjusting the height of the placement platform 12 to adapt to materials to be tested of different thicknesses, thereby improving the versatility of the constant temperature Shore hardness tester 10 in experiments.
[0030] Specifically, the adjustment assembly includes a support rod 21 and an adjustment fixing rod 22. The placement platform 12 is slidably mounted on the outer periphery of both the support rod 21 and the adjustment fixing rod 22. The adjustment fixing rod 22 is threadedly mounted with an adjustment nut 23, which supports and fixes the placement platform 12 from the bottom side. This allows the height of the placement platform 12 to be adjusted, thereby improving the overall versatility of the constant temperature Shore hardness tester 10.
[0031] Furthermore, a support plate 24 is provided at the upper end of the adjustment nut 23 to enhance the support stability of the placement platform 12. A first distance sensor 25 is provided on the underside of the support plate 24 to detect the height adjustment of the placement platform 12 relative to the mounting base 11. Thus, the support plate 24 enhances the support stability of the placement platform 12, while the first distance sensor 25 allows for accurate adjustment of the height of the placement platform 12. The first distance sensor 25 can also be equipped with a buzzer to provide an audible reminder when the placement platform 12 moves to a preset distance.
[0032] Since the upward and downward adjustment range of the placement platform 12 is relatively small, the upward and downward thread distance of the thread of the adjusting nut 23 on the adjusting fixing rod 22 can meet the adjustment range.
[0033] An adjusting screw can be installed at one end of the adjusting fixing rod 22 in the above technical solution to fix the support plate 24 to the lower side of the placement platform 12. In this way, the height of the placement platform 12 can be adjusted by controlling the adjusting screw through the detection value of the first distance sensor 25. Not only is the adjustment accuracy high, but the adjustment operation is also more convenient without the need to manually rotate the adjusting nut 23.
[0034] As a specific embodiment, a positioning rod is further provided above the mounting base 11 to provide more stable support for the placement platform 12. The placement platform 12 is sleeved onto the outer periphery of the positioning rod, and a positioning nut is threadedly provided on the outer periphery of the positioning rod to support and position the placement platform 12 from below. The positioning rod and an adjustment and fixing rod 22 are respectively located on either side of the support rod 21 to ensure the stability of the support for the placement platform 12.
[0035] As a specific embodiment, a limit screw 26 is provided on the crossbeam 14 to define the installation position of the fixed load weight 16 relative to the hardness tester clamping rod 15. The fixed load weight 16 is mounted on the outer periphery of the limit screw 26. A limit nut 27 is threadedly mounted on the outer periphery of the limit screw 26 to limit the position of the fixed load weight 16.
[0036] Furthermore, a second distance sensor 28 is provided on the lower side of the limiting nut 27 for detecting the height of the fixed load weight 16 relative to the crossbeam 14 , thereby ensuring the installation accuracy of the fixed load weight 16 .
[0037] The values of the temperature sensor 29 , the first distance sensor 25 and the second distance sensor 28 can be set not only through the temperature control touch screen 31 , but also through the control APP on the mobile terminal.
[0038] The operating handle 18 in the above-described embodiment utilizes a conventional mounting method in the art and can be rotated clockwise relative to the crossbeam 14 to a detection position and counterclockwise relative to the crossbeam 14 to return to a non-detection position. The operating handle 18 is provided with a support portion 181 for contacting the fixed-load weight 16 from below to maintain it in the non-detection position. Applying an external force to the operating handle 18, which overcomes the elastic force of the torsion spring, causes the support portion 181 to move clockwise downward until the fixed-load weight 16 enters the detection position.
[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solution obtained by equivalent replacement or equivalent transformation falls within the scope of protection of the present invention.
Claims
1. A constant temperature Shore hardness tester, characterized in that: include: Mounting seat; A placement platform for placing the material to be tested is provided above the mounting seat; A column is also provided above the mounting seat; A crossbeam is adjustably mounted on the column; The crossbeam is slidably mounted in the vertical direction with a hardness tester clamping rod for mounting a hardness tester for pressing a material to be tested to detect the hardness of the material to be tested; A fixed load weight is installed above the clamping rod of the hardness tester; The top thread of the hardness tester clamping rod is threaded with a locking screw for locking the installation position of the fixed load weight; The crossbeam is rotatably mounted with an operating handle for controlling the lifting and lowering of the hardness tester clamping rod; A constant temperature box is provided in the mounting base; The constant temperature box is provided with a heating wire for constant temperature heating of the placement platform above; A temperature control touch screen for parameter setting is also provided on one side of the constant temperature box; The heating circuit of the heating wire is electrically connected to the temperature-controlled touch screen.
2. The constant temperature Shore hardness tester according to claim 1, characterized in that: The upper cover of the placement platform is provided with a glass cover for balancing the temperature of the material to be tested.
3. The constant temperature Shore hardness tester according to claim 2, characterized in that: A temperature sensor for detecting the temperature of the placement platform is provided between the glass cover and the placement platform.
4. The constant temperature Shore hardness tester according to claim 1, characterized in that: An adjustment component is provided below the placement platform for adjusting the height of the placement platform to adapt to materials to be tested of different thicknesses; The adjustment assembly includes: a support rod and an adjustment fixing rod; The placement platform is slidably sleeved on the outer periphery of the support rod and the adjustment and fixing rod; The threaded sleeve of the adjusting and fixing rod is provided with an adjusting nut; The adjusting nut supports and fixes the placement platform from the lower side of the placement platform.
5. The constant temperature Shore hardness tester according to claim 4, characterized in that: A support plate is provided at the upper end of the adjusting nut for improving the support stability of the placement platform.
6. The constant temperature Shore hardness tester according to claim 5, characterized in that: A first distance sensor for detecting the adjusted height of the placement platform relative to the mounting seat is provided on the lower side of the support plate.
7. The constant temperature Shore hardness tester according to claim 4, characterized in that: A positioning rod for stably supporting the placement platform is also provided above the mounting seat; The placement platform is sleeved on the outer circumference of the positioning rod; A positioning nut for supporting and positioning the placement platform from below the placement platform is also threadedly sleeved on the outer periphery of the positioning rod.
8. The constant temperature Shore hardness tester according to claim 7, characterized in that: The positioning rod and the adjusting and fixing rod are respectively located on both sides of the supporting rod.
9. The constant temperature Shore hardness tester according to claim 1, characterized in that: The crossbeam is provided with a limit screw for limiting the installation position of the fixed load weight relative to the hardness tester clamping rod; The fixed load weight is sleeved on the outer periphery of the limit screw; The outer threaded sleeve of the limiting screw is provided with a limiting nut for limiting and supporting the fixed load weight.
10. The constant temperature Shore hardness tester according to claim 9, characterized in that: A second distance sensor for detecting the height of the fixed load weight relative to the crossbeam is provided on the lower side of the limiting nut.