An electric hardness tester

Abstract

The utility model discloses a kind of electric hardness tester, including base, the upper surface of the front part of base is equipped with pressure disc, the rear end of base is equipped with vertical upward guide rod, the upper portion of guide rod is equipped with sliding seat, the side of sliding seat towards pressure disc is fixed with L-shaped motor mount, the upper surface of the transverse plate of L-shaped motor mount is equipped with motor, motor below is equipped with interval separation's upper bearing seat and lower bearing seat, between upper bearing seat and lower bearing seat, there is the lifting block that can move up and down;The output shaft of motor downward is connected screw rod through coupling, screw rod is equipped with nut seat, nut seat is fixed and set on lifting block;The transverse plate of L-shaped motor mount is equipped with elongated bar, the bottom end of elongated bar sequentially penetrates the transverse plate of L-shaped motor mount, lifting block extends to the lower surface of lifting block after lifting block, the bottom end of elongated bar is equipped with hardness tester connector, and hardness tester is set in the directly above of pressure disc. The present application realizes vertical standardization loading, and improves the accuracy and repeatability of test result.

Description

Technical Field

[0001] This utility model belongs to the field of testing equipment technology, and in particular relates to an electric lifting hardness tester testing device, which is especially suitable for standardized and vertical indentation testing of samples in laboratory and industrial settings. Background Technology

[0002] In current material hardness testing, handheld hardness testers are commonly used for on-site or fixed-point measurements. These devices typically require operators to manually apply pressure, pressing the indenter vertically into the sample surface, and obtaining hardness data by reading the rebound value or indentation depth. While these devices are simple in structure and easy to carry, in practical applications, the reliance on manual force application makes it difficult to ensure the loading direction is always perfectly perpendicular to the sample surface, leading to significant human error and affecting measurement accuracy and reliability. Furthermore, the manual pressing process results in inconsistent and unreliable loading force. Utility Model Content

[0003] In order to solve the problems existing in the prior art, the purpose of this utility model is to provide an electric hardness tester, which aims to solve the measurement deviation problem caused by human factors in traditional handheld hardness testers, and can realize automatic vertical loading, improve testing accuracy and efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An electric hardness tester includes a base, a pressure plate on the front of the base, a vertically upward guide rod at the rear of the base, a sliding seat on the upper part of the guide rod, an L-shaped motor mounting seat fixed on the side of the sliding seat facing the pressure plate, a motor on the horizontal plate of the L-shaped motor mounting seat, an upper bearing seat and a lower bearing seat separated by space below the motor, and a lifting block that can move up and down between the upper bearing seat and the lower bearing seat. The downward output shaft of the motor is connected to a lead screw via a coupling. The lead screw is equipped with a nut seat, which is fixedly mounted on the lifting block. An extension rod is installed on the horizontal plate of the L-shaped motor mounting base. The bottom end of the extension rod passes through the horizontal plate and the lifting block of the L-shaped motor mounting base in sequence and extends to the bottom of the lifting block. A hardness tester connector is installed at the bottom end of the extension rod, and the hardness tester is set directly above the pressure plate.

[0005] Furthermore, in some embodiments, a load is provided at the top of the extension rod, a hardness tester connector is provided at the bottom of the extension rod, and a hardness tester is provided at the bottom end of the hardness tester connector that is away from the extension rod and pointing downwards.

[0006] Furthermore, in some embodiments, a guide shaft is provided between the upper bearing housing and the lower bearing housing, with both ends of the guide shaft fixed on the upper bearing housing and the lower bearing housing respectively; the lifting block is sleeved on the guide shaft.

[0007] Furthermore, in some embodiments, the sliding seat is provided with an adjustable handle that can lock the sliding seat onto the guide rod; a fixing sleeve is fixed on the extension rod, and the fixing sleeve is disposed on the lifting block.

[0008] Furthermore, in some embodiments, the upper bearing housing and the lower bearing housing are fixed on the longitudinal plate of the L-shaped motor mounting base, the end of the lead screw away from the motor is disposed on the lower bearing housing, and the coupling is disposed on the upper bearing housing.

[0009] This application improves upon the original manual operation mode by introducing an electrically driven lifting hardness tester. This allows the hardness tester to move smoothly up and down along a vertical guide rail, achieving standardized vertical loading. Through the mechanical guide rail and the electric lifting structure, it ensures that the indenter always contacts the sample surface in a vertical posture, completely eliminating measurement errors caused by human tilting, reducing labor intensity, improving efficiency, and enhancing the consistency and accuracy of testing. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 This is an exploded view of an embodiment of the present invention.

[0011] Explanation of markings in the diagram: 11. Base, 12. Pressure plate, 13. Guide rod, 14. Lead screw, 15. L-shaped motor mounting base, 16. Sliding seat, 17. Adjustable handle, 18. Lifting block, 19. Upper bearing seat, 20. Load, 21. Extension rod, 22. Motor, 23. Coupling, 24. Fixing sleeve, 25. Nut seat, 26. Hardness tester connector, 27. Lower bearing seat, 28. Hardness tester, 29. Guide shaft. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0013] In the description of this utility model, it should be noted that the terms "lateral," "upper," "lower," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this utility model and for 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. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., 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. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly defined.

[0014] Please refer to the attached drawings. This application includes a base 11, which is used to fix other components and provide a stable working platform. A pressure plate 12 (sample plate) is provided on the front of the base 11. The pressure plate 12 is used to carry the sample to be tested. The pressure plate 12 has a leveling function and can be horizontally calibrated by adjusting the mechanism to ensure that the sample placement surface is perpendicular to the movement axis of the indenter of the hardness tester 28.

[0015] Furthermore, in one embodiment, the rear end of the base 11 is provided with a vertically upward guide rod 13, the upper part of the guide rod 13 is provided with a sliding seat 16, and the sliding seat 16 is provided with an adjustable handle 17 that can lock the sliding seat 16 onto the guide rod 13; the adjustable handle 17 assists in manually adjusting the position of the L-shaped motor mounting seat 15, which is convenient for initial positioning or maintenance and debugging.

[0016] An L-shaped motor mounting base 15 is fixedly mounted on the side of the sliding seat 16 facing the pressure plate 12. A motor 22 is mounted on the horizontal plate of the L-shaped motor mounting base 15. Below the motor 22 are spaced-apart upper bearing seats 19 and lower bearing seats 27, which provide rotational support and reduce frictional resistance. The upper bearing seats 19 and lower bearing seats 27 are fixed on the vertical plate of the L-shaped motor mounting base 15. A lifting block 18 that can move up and down is provided between the upper bearing seats 19 and lower bearing seats 27. The lifting block 18 is connected to the hardness tester 28 and slides in cooperation with the guide rod 13, moving up and down with the transmission of the lead screw 14.

[0017] Furthermore, in one embodiment, the downward output shaft of the motor 22 is connected to the lead screw 14 via a coupling 23. The end of the lead screw 14 away from the motor 22 is mounted on the lower bearing seat 27, and the coupling 23 is mounted on the upper bearing seat 19. The lead screw 14 is provided with a nut seat 25, which is fixedly mounted on the lifting block 18. The motor 22 drives the lead screw 14 to rotate, and the lead screw 14 drives the lifting block 18 to move up and down through the nut seat 25.

[0018] Furthermore, in one embodiment, an extension rod 21 is provided through the horizontal plate of the L-shaped motor mounting base 15. The bottom end of the extension rod 21 passes through the horizontal plate of the L-shaped motor mounting base 15 and the lifting block 18 in sequence, and extends to the bottom of the lifting block 18. A fixing sleeve 24 is fixed on the extension rod 21. The fixing sleeve 24 is set on the lifting block 18. When the lifting block 18 moves up and down, the extension rod 21 is driven to move up and down through the fixing sleeve 24.

[0019] The top of the extension rod 21 is equipped with a load 20, and the bottom of the extension rod 21 is equipped with a hardness tester connector 26. The lower end of the hardness tester connector 26 is equipped with a hardness tester 28. That is, the hardness tester 28 is located at the bottom of the hardness tester connector 26 away from the extension rod 21 and downward. The hardness tester 28 is positioned directly above the pressure plate 12. The indenter of the hardness tester 28 faces downward and automatically presses into the sample surface during the descent to complete the test.

[0020] Furthermore, in one embodiment, a guide shaft 29 is provided between the upper bearing seat 19 and the lower bearing seat 27, with both ends of the guide shaft 29 fixed on the upper bearing seat 19 and the lower bearing seat 27 respectively; the lifting block 18 is sleeved on the guide shaft 29, and the guide shaft 29 provides guidance for the up and down movement of the lifting block 18, ensuring the linearity and stability of the lifting movement.

[0021] During use, the operator places the sample to be tested on the leveled pressure plate 12; after starting the control system, the motor 22 rotates forward, and through the coupling 23, lead screw 14 and nut seat 25, it drives the lifting block 18 to descend smoothly along the guide shaft 29 until the indenter of the hardness tester 28 contacts the sample on the pressure plate 12 and completes the prescribed loading procedure; after the test is completed, the motor 22 reverses and drives the hardness tester 28 back to the initial position so that the next sample can be replaced.

[0022] The entire process requires no manual force application, achieving a closed-loop operation process of "one-click start, automatic pressing, and automatic reset".

[0023] This application effectively solves the problems of non-vertical loading, large human error, and poor repeatability in the prior art by upgrading the traditional manual operation to electric vertical lifting control; it can also be used to adapt various models of hardness testers 28 by replacing the hardness tester connector 26, making it applicable to a wide range of scenarios.

[0024] The embodiments described above only illustrate some implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. An electric hardness tester, comprising: The base (11) is characterized in that a pressure plate is provided on the front part of the base (11), a vertically upward guide rod (13) is provided at the rear end of the base (11), a sliding seat (16) is provided on the upper part of the guide rod (13), an L-shaped motor mounting seat (15) is fixed on the side of the sliding seat (16) facing the pressure plate (12), a motor (22) is provided on the horizontal plate of the L-shaped motor mounting seat (15), an upper bearing seat (19) and a lower bearing seat (27) are provided below the motor (22), and a lifting block (18) that can move up and down is provided between the upper bearing seat (19) and the lower bearing seat (27). The downward output shaft of the motor (22) is connected to the lead screw (14) through the coupling (23). The lead screw (14) is provided with a nut seat (25), which is fixedly mounted on the lifting block (18). An extension rod (21) is provided on the horizontal plate of the L-shaped motor mounting base (15). The bottom end of the extension rod (21) passes through the horizontal plate of the L-shaped motor mounting base (15) and the lifting block (18) in sequence, and extends to the bottom of the lifting block (18). The bottom end of the extension rod (21) is provided with a hardness tester connector (26), and the hardness tester (28) is located directly above the pressure plate (12).

2. The electric hardness tester according to claim 1, characterized in that, The extension rod (21) has a load (20) at its top and a hardness tester connector (26) at its bottom. The hardness tester connector (26) is located at the bottom end of the extension rod (21) away from the extension rod (21) and downwards. A hardness tester (28) is located at the bottom end of the hardness tester connector (26) away from the extension rod (21).

3. The electric hardness tester according to claim 1, characterized in that, A guide shaft (29) is provided between the upper bearing seat (19) and the lower bearing seat (27), with both ends of the guide shaft (29) fixed on the upper bearing seat (19) and the lower bearing seat (27) respectively; the lifting block (18) is sleeved on the guide shaft (29).

4. The electric hardness tester according to claim 1, characterized in that, The sliding seat (16) is provided with an adjustable handle (17) that can lock the sliding seat (16) onto the guide rod (13); a fixed sleeve (24) is fixed on the extension rod (21), and the fixed sleeve (24) is set on the lifting block (18).

5. An electric hardness tester according to claim 1, characterized in that, The upper bearing seat (19) and the lower bearing seat (27) are fixed on the longitudinal plate of the L-shaped motor mounting base (15). The end of the lead screw (14) away from the motor (22) is set on the lower bearing seat (27), and the coupling (23) is set on the upper bearing seat (19).

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