A portable hardness tester

Abstract

The utility model provides a kind of portable hardness tester, it relates to a hardness tester technical field.The utility model includes support seat, force sensor structure, indenter, electronic circuit board, measurement module and digital display, wherein, the top of support seat is provided with connecting barrel, micrometer nut, micrometer screw and lifting screw are arranged in support seat, driving assembly is arranged on connecting barrel and the side end of connecting barrel is provided with measurement module, connecting barrel rotates synchronously with micrometer nut and micrometer screw, and micrometer nut is connected with support seat by bearing structure, the bottom of lifting screw is connected with indenter by force sensor structure.The utility model can adopt electric or manual double loading mode, replaceable support structure and high-precision displacement detection system, can adapt to laboratory, field, narrow space and other various scenes, significantly improve detection efficiency and equipment utilization.

Description

Technical Field

[0001] This utility model relates to the field of hardness tester technology, and in particular to a portable hardness tester. Background Technology

[0002] Hardness testers typically measure hardness by applying a specified test force to a specified indenter and measuring the indentation. Based on their application, hardness testers can be categorized into benchtop hardness testers and portable hardness testers. Benchtop hardness testers are primarily installed in fixed locations such as laboratories, usually requiring the workpiece to be placed on a measuring table and the test force applied to the indenter. Portable hardness testers are portable and mainly used in workshops or engineering sites. Portable magnetic hardness testers can be used to measure large or immobile workpieces.

[0003] Traditional portable hardness testers mostly use a single loading method (electric or manual) and a fixed bracket structure, which has the following drawbacks:

[0004] Poor adaptability to different scenarios: Fixed supports cannot be adapted to curved surfaces, narrow spaces, or large workpieces.

[0005] Insufficient operational flexibility: Electric loading relies on power supply, while manual loading has low accuracy, making it impossible to balance efficiency and reliability.

[0006] Low measurement stability: Indenter displacement detection is easily affected by mechanical transmission errors or vibration interference. Utility Model Content

[0007] To address the shortcomings mentioned above, this utility model provides a portable hardness tester that can adopt dual loading modes (electric or manual), a replaceable bracket structure, and a high-precision displacement detection system. It can adapt to various scenarios such as laboratories, fields, and confined spaces, significantly improving testing efficiency and equipment utilization.

[0008] To address the aforementioned problems, this utility model provides a portable hardness tester, comprising a support base, a force sensor structure, an indenter, an electronic circuit board, a measurement module, and a digital display. The support base has a connecting cylinder at its top, and an axially hollow cylinder inside. A micrometer nut, a micrometer screw, and a lifting screw are mounted on the axially hollow cylinder. The upper end of the micrometer screw is located below the connecting cylinder, and the lower end is located above the support base. The lower end of the micrometer screw is threadedly connected to the micrometer nut. The lifting screw is located below the support base, and its top end is fixedly connected to the bottom end of the micrometer screw. The upper end of the lifting screw is nut-connected to the micrometer nut. A drive assembly is mounted on the connecting cylinder, and a measurement module is located on its side. The connecting cylinder rotates synchronously with the micrometer screw via the micrometer nut. The micrometer nut is connected to the support base via a bearing structure, and the bottom end of the lifting screw is connected to the indenter via a force sensor structure.

[0009] Preferably, the drive assembly includes a manual drive assembly or an electric drive assembly, wherein the manual drive assembly is disposed at the top end of the connecting cylinder or the electric drive assembly is disposed at the top end of the connecting cylinder.

[0010] Preferably, the manual drive assembly includes a clamping nut and a handwheel, the handwheel being disposed at the upper end of the connecting cylinder and connected to the top end of the connecting cylinder via the clamping nut.

[0011] Preferably, the electric drive assembly includes a drive motor and a coupling, with the drive motor located at the top of the connecting cylinder and the output end of the drive motor connected to the top of the micrometer screw via the coupling.

[0012] Preferably, the bearing structure includes a planar bearing, a centering bearing, and a thrust ball bearing. The planar bearing includes a first planar bearing and a second planar bearing. The first planar bearing, the centering bearing, the thrust ball bearing, and the second planar bearing are arranged sequentially from top to bottom on the axial hollow cylinder.

[0013] Preferably, the support base includes a first support base and a second support base. The first support base is disposed at the top of the second support base. A first planar bearing and a centering bearing are disposed inside the first support base. A thrust ball bearing and a second planar bearing are disposed inside the second support base.

[0014] Preferably, a screen bracket is provided on the side of the support base, and a digital display is provided on the screen bracket.

[0015] Preferably, the bottom end of the support base is provided with a magnetic chuck bracket, which includes a first magnetic chuck bracket and a second magnetic chuck bracket, and the first magnetic chuck bracket and the second magnetic chuck bracket are symmetrically installed on both sides of the support base.

[0016] Preferably, the micrometer nut and the micrometer screw are integral parts.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. This utility model has a simple structure and is easy to use. By setting up a micrometer screw and a lifting screw, the equipment can transmit force in one direction, which not only increases the stability of the applied force and the loading efficiency, but also avoids the problem of insufficient compatibility caused by the presence of heterogeneous workpieces in the transmission workpiece.

[0019] 2. This utility model can adopt dual loading modes of electric or manual, a replaceable bracket structure and a high-precision displacement detection system, which can adapt to various scenarios such as laboratories, fields and confined spaces, and significantly improve detection efficiency and equipment utilization.

[0020] 3. This utility model, by adopting a portable hardness tester with selectable loading methods and switchable support structures, greatly solves the problem of poor adaptability of existing equipment. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the manual drive structure of an embodiment of this utility model;

[0023] Figure 3 This is a schematic diagram of the electric drive structure of an embodiment of this utility model;

[0024] Figure 4 This is a schematic diagram of a manual portable structure according to an embodiment of this utility model;

[0025] Figure 5 This is a schematic diagram of an embodiment of the electric portable structure of this utility model.

[0026] Explanation of key component symbols:

[0027] 1-Indenter head 2-Micrometer nut 3-Micrometer screw

[0028] 4-Lifting screw 5-Pressure head seat 6-Connecting sleeve

[0029] 7-Force sensor 8-Connecting cylinder 9-Measurement module

[0030] 10-Stabilizing bearing; 11-Thrust ball bearing; 12-First plane bearing

[0031] 13-Second plane bearing; 14-First support seat; 15-Second support seat

[0032] 16-Locking nut 17-Screen bracket 18-Drive motor

[0033] 19-Coupling 20-Handwheel 21-Pressure nut

[0034] 22-First magnetic chuck bracket 23-First magnetic chuck bracket Detailed Implementation

[0035] To make the objectives, technical solutions and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and examples, but the examples given are not intended to limit the present utility model.

[0036] like Figures 1 to 5As shown, the embodiment of this utility model includes a support base, a force sensor structure, a pressure head 1, an electronic circuit board (not shown in the attached figure), a measurement module 9, and a digital display. The support base is provided with a micrometer nut 2, a micrometer screw 3, and a lifting screw 4. The micrometer nut 2 and the micrometer screw 3 are integral parts. The bottom end of the support base is provided with a force sensor structure, and the bottom end of the force sensor structure is connected to the pressure head 1 through a pressure head seat 5. The force sensor structure includes a connecting sleeve 6, a force sensor 7, and a force sensor mounting base. The support base is provided with an electronic circuit board, and the force sensor 7, the measurement module 9, and the digital display are electrically connected to the electronic circuit board.

[0037] In this embodiment, a connecting cylinder 8 is provided at the top of the support base, and a measuring module 9 is provided at the side end of the connecting cylinder 8. The measuring module 9 includes a grating code disk or a rotary encoder. The connecting cylinder 8 rotates synchronously with the micrometer screw 3 through the micrometer nut 2, and the micrometer nut 2 is connected to the support base through a bearing structure. The bottom end of the lifting screw 4 is connected to the pressure head 1 through a force sensor structure. Furthermore, the device uses a grating code disk or a rotary encoder to detect the displacement of the pressure head 1.

[0038] In this embodiment, a drive assembly is provided on the connecting cylinder 8. The drive assembly includes a manual drive assembly or an electric drive assembly. Depending on the usage requirements, pressure can be applied electrically or manually by rotation. The manual drive assembly is located at the top of the connecting cylinder 8 and includes a clamping nut 21 and a handwheel 20. The handwheel 20 is located at the upper end of the connecting cylinder 8 and is connected to the top of the connecting cylinder 8 through the clamping nut 21. Alternatively, the electric drive assembly is located at the top of the connecting cylinder 8 and includes a drive motor 18 and a coupling 19. The drive motor 18 is located at the top of the connecting cylinder 8 and its output end is connected to the top of the micrometer screw 3 through the coupling 19.

[0039] In this embodiment, an axially hollow cylinder is provided inside the support base. A micrometer nut 2, a micrometer screw 3, and a lifting screw 4 are provided on the axially hollow cylinder. The upper end of the micrometer screw 3 is located on the lower side of the connecting cylinder 8, and the lower end of the micrometer screw 3 is located on the upper side of the support base. The lower end of the micrometer screw 3 is threadedly connected to the micrometer nut 2. The lifting screw 4 is located on the lower side of the support base, and the top end of the lifting screw 4 is fixedly connected to the bottom end of the micrometer screw 3. The upper end of the lifting screw 4 is nut-connected to the micrometer nut 2. The lifting displacement of the micrometer screw 3 and the lifting screw 4 is measured by a grating code disk or a rotary encoder.

[0040] In this embodiment, the connecting sleeve 6, the force sensor 7, and the force sensor mounting base are connected. The top end of the connecting sleeve 6 is connected to the bottom end of the lifting screw 4, the bottom end of the connecting sleeve 6 is connected to the top end of the force sensor 7, the force sensor base is installed at the bottom of the force sensor 7, and the top end of the pressure head 1 is connected to the lower end of the force sensor base through the pressure head base 5.

[0041] In this embodiment, the bearing structure includes a planar bearing, a centering bearing 10, and a thrust ball bearing 11. The planar bearing includes a first planar bearing 12 and a second planar bearing 13. The first planar bearing 12, the centering bearing 10, the thrust ball bearing 11, and the second planar bearing 13 are arranged sequentially from top to bottom on the axial hollow cylinder. The support base includes a first support base 14 and a second support base 15. The first support base 14 is located at the top of the second support base 15. The first support base 14 contains the first planar bearing 12 and the centering bearing 10, and the second support base 15 contains the thrust ball bearing 11 and the second planar bearing 13.

[0042] In this embodiment, a screen bracket 17 is provided on the side of the support base, and a digital display (not shown in the attached figure) is provided on the screen bracket 17.

[0043] In this embodiment, a magnetic chuck bracket is provided at the bottom of the support base. The magnetic chuck bracket includes a first magnetic chuck bracket 22 and a second magnetic chuck bracket 23. The first magnetic chuck bracket 22 and the second magnetic chuck bracket 23 are symmetrically installed on both sides of the support base. Depending on the usage scenario and environment requirements, the magnetic chuck bracket can still be selected as a double-sided magnetic chuck bracket or a single-sided magnetic bracket. In addition, a corresponding C-shaped frame or the like can also be provided on the support base.

[0044] In this embodiment, the working principle is as follows: After powering on, the entire machine is placed separately on the surface of the sample to be tested or adsorbed onto the surface of the sample by a magnetic chuck bracket. When the drive component is a manual drive component, the handwheel 20 is connected to the top of the connecting cylinder 8 through the clamping nut 21. By rotating the handwheel 20, the connecting cylinder 8, micrometer nut 2, micrometer screw 3, and lifting screw 4 are driven to rotate. The grating code disk or rotary encoder is mounted on the connecting cylinder 8 and rotates synchronously. The micrometer screw 3 pushes the force sensor 7, pressure head seat 5, and pressure head 1 downwards towards the surface of the sample to be tested through the lifting screw 4, connecting sleeve 6, and force sensor seat. When the pressure head 1 contacts the surface of the sample to be tested, as the handwheel 20 continues to rotate, the pressure head 1 will generate pressure on the surface of the sample to be tested. The force sensor 7 transmits the pressure signal received by the pressure head to the electronic circuit board. The electronic circuit board will calculate the corresponding hardness value based on the hardness tester principle. The hardness value of the sample to be tested is displayed on the digital display. When the drive assembly is an electric drive assembly, the output end of the drive motor 18 is connected to the top of the micrometer screw 3 through the coupling 19. The rotation of the drive motor 18 drives the connecting cylinder 8, the micrometer nut 2, the micrometer screw 3 and the lifting screw 4 to rotate. The grating code disk or rotary encoder is set on the connecting cylinder 8 and rotates synchronously. The micrometer screw 3 pushes the force sensor 7, the indenter seat 5 and the indenter 1 to move downward to the surface of the sample to be tested through the lifting screw 4, the connecting sleeve 6 and the force sensor seat. When the indenter 1 contacts the surface of the sample to be tested, with the continuous output of the drive motor 18, the indenter 1 will generate pressure on the surface of the sample to be tested. The force sensor 7 transmits the pressure signal received by the indenter 1 to the electronic circuit board. The electronic circuit board calculates the corresponding hardness value according to the hardness tester principle and displays the hardness value of the sample to be tested on the digital display.

[0045] Those skilled in the art can connect all electrical components and their compatible power supplies in this case via wires, and should select appropriate controllers according to actual conditions to meet control requirements. The specific connection and control sequence, and the sequential operation order between each electrical component to complete the electrical connection, are well-known technologies in the field, and will not be described further regarding electrical control.

[0046] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

[0047] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing the technical solution of this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this patent application.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this patent application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this specification, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this specification according to the specific circumstances.

[0050] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0052] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A portable hardness tester comprising a support base, a force sensor structure, an indenter, an electronic circuit board, a measuring module and a digital display, characterized in that, The support base has a connecting cylinder at its top, and an axially hollow cylinder inside. A micrometer nut, a micrometer screw, and a lifting screw are mounted on the axially hollow cylinder. The upper end of the micrometer screw is located on the lower side of the connecting cylinder, and the lower end of the micrometer screw is located on the upper side of the support base. The lower end of the micrometer screw is threadedly connected to the micrometer nut. The lifting screw is located on the lower side of the support base, and its top end is fixedly connected to the bottom end of the micrometer screw. The upper end of the lifting screw is connected to the micrometer nut. A drive assembly is mounted on the connecting cylinder, and a measuring module is mounted on its side. The connecting cylinder rotates synchronously with the micrometer screw via the micrometer nut. The micrometer nut is connected to the support base via a bearing structure, and the bottom end of the lifting screw is connected to the pressure head via a force sensor structure.

2. A portable hardness tester as claimed in claim 1, wherein The drive assembly includes a manual drive assembly or an electric drive assembly, wherein the manual drive assembly is located at the top of the connecting cylinder or the electric drive assembly is located at the top of the connecting cylinder.

3. A portable hardness tester as claimed in claim 2, wherein The manual drive assembly includes a clamping nut and a handwheel, with the handwheel located at the upper end of the connecting cylinder and connected to the top of the connecting cylinder via the clamping nut.

4. A portable hardness tester as claimed in claim 2, wherein The electric drive assembly includes a drive motor and a coupling. The drive motor is located at the top of the connecting cylinder, and the output end of the drive motor is connected to the top of the micrometer screw through the coupling.

5. A portable hardness tester as claimed in claim 2, wherein The bearing structure includes a planar bearing, a centering bearing, and a thrust ball bearing. The planar bearing includes a first planar bearing and a second planar bearing. The first planar bearing, the centering bearing, the thrust ball bearing, and the second planar bearing are arranged sequentially from top to bottom on the axial hollow cylinder.

6. A portable hardness tester according to claim 5, wherein The support base includes a first support base and a second support base. The first support base is disposed at the top of the second support base. A first planar bearing and a centering bearing are disposed inside the first support base. A thrust ball bearing and a second planar bearing are disposed inside the second support base.

7. A portable hardness tester according to claim 6, wherein A screen bracket is provided on the side of the support base, and a digital display is provided on the screen bracket.

8. A portable hardness tester as claimed in claim 6, wherein The bottom of the support base is provided with a magnetic chuck bracket, which includes a first magnetic chuck bracket and a second magnetic chuck bracket. The first magnetic chuck bracket and the second magnetic chuck bracket are symmetrically installed on both sides of the support base.

9. A portable hardness tester as claimed in claim 1, wherein, The micrometer nut and the micrometer screw are an integral part.

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