Rockwell hardness tester

Abstract

The utility model discloses a Rockwell hardness tester, which relates to the technical field of Rockwell hardness testers, and comprises a detector shell, the inner wall of the detector shell is vertically and slidably provided with a lifting platform extending to the outside of the detector shell, and the outer wall of the lifting platform is in threaded sleeve connection with a lifting rotating wheel rotationally connected with the detector shell. And a detection head for detecting the hardness of the material and a limiting mechanism arranged on the detector shell are arranged on the inner side of the detector shell and located over the lifting platform. Through the arrangement of the limiting mechanism, after the lifting rotating wheel is rotated clockwise to control the lifting platform to move to a preset position, the end of the rubber block can abut against the outer wall of the lifting rotating wheel, load is applied to rotation of the lifting rotating wheel, and friction force is increased for anticlockwise rotation of the lifting rotating wheel; and the lifting rotating wheel is not easy to drive the lifting platform to fall back, so that the stability in the loading detection process of the materials is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of Rockwell hardness tester, in particular to a Rockwell hardness tester. Background Art

[0002] The Rockwell hardness tester is the world's first Rockwell hardness tester designed based on the Rockwell hardness test principle. It can test the hardness of metals by only contacting the sample on one side. The Rockwell hardness tester probe is adsorbed on the steel surface by magnetic force, and there is no need to support the sample. It is no less than a desktop Rockwell hardness tester.

[0003] In the prior art, during the process of testing materials, it is necessary to manually adjust the height of the platform so that the platform contacts the detection head, and use the detection device to automatically complete the test force application, load holding, and load unloading of the material to complete the hardness test of the material. During this process, in order to ensure that the height of the material is not disturbed and further increase the accuracy of the test, the utility model proposes a Rockwell hardness tester. Utility Model Content

[0004] The purpose of the utility model is to provide a Rockwell hardness tester in order to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a Rockwell hardness tester, comprising a detector housing, a lifting platform extending to the outside of the detector housing is vertically slidably mounted on the inner wall of the detector housing, a lifting wheel rotatably connected to the detector housing is threadedly sleeved on the outer wall of the lifting platform, a detection head for hardness detection of materials is arranged on the inner side of the detector housing and located just above the lifting platform, and a limit mechanism is arranged on the detector housing;

[0006] The limiting mechanism includes a limiting unit and a resetting unit;

[0007] The limiting unit is used to provide friction force for the rotation of the lifting wheel;

[0008] The reset unit is used to provide the limiting unit with a torque that always fits the outer wall of the lifting wheel.

[0009] As a further solution of the utility model: the limiting unit includes a rotating rod, a rubber block, a movable rod, and a limiting groove;

[0010] The rotating rod is rotatably mounted inside the detector housing and extends to the outer wall of the detector housing, and the rotating rod is used to synchronously drive the rubber block to rotate;

[0011] The rubber block is fixed to the outer wall of the rotating rod, and after rotation, the rubber block is used to press against the outer wall of the lifting wheel to increase the rotation friction of the lifting wheel;

[0012] The movable rod is vertically slidably mounted on the inner wall of the rotating rod and extends to the outside of the rotating rod, and the movable rod is used to cooperate with the limiting groove to limit the rotation of the rotating rod;

[0013] The limiting groove is arranged on the outer wall of the detector housing, and the limiting groove is used to provide space for the movable rod to enter.

[0014] As a further solution of the utility model: the reset unit includes a positioning rod and a torsion spring;

[0015] The positioning rod is fixed to the bottom end of the rotating rod and is rotatably connected to the inner wall of the detector housing, and the positioning rod is used to provide support for the rotation of the rotating rod;

[0016] The two ends of the torsion spring are respectively clamped on the outer wall of the detector housing and fixed on the bottom end of the rotating rod. The torsion spring is sleeved on the outer wall of the positioning rod. The torsion spring is used to provide torque for the rotation of the rotating rod.

[0017] As a further solution of the utility model: the outer wall of the rotating rod is formed with a vertical sliding groove for the movable rod to move up and down, and the outer wall of the movable rod matches the inner side of the limiting groove.

[0018] As a further solution of the utility model: the rubber block and the movable rod are distributed at 90 degrees on the outer wall of the rotating rod, and the length of the rotating rod is longer than the length accommodated by the limiting groove.

[0019] As a further solution of the utility model: the rotation direction of the lifting wheel is the same as the direction of the torsion force exerted on the rotating rod by the torsion spring.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] By setting a limit mechanism, after the lifting wheel is rotated clockwise to control the lifting platform to move to a preset position, the end of the rubber block can be used to abut against the outer wall of the lifting wheel to apply a load to the rotation of the lifting wheel, thereby increasing the friction for the counterclockwise rotation of the lifting wheel, making it difficult for the lifting wheel to drive the lifting platform to fall back, thereby further increasing the stability of the material loading detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the utility model;

[0023] Figure 2 It is a partial enlarged view of point A of the utility model;

[0024] Figure 3 It is a structural schematic diagram of the limiting mechanism of the utility model.

[0025] In the figure: 1. detector housing; 2. lifting platform; 3. lifting wheel; 4. limiting mechanism; 401. rotating rod; 402. rubber block; 403. movable rod; 404. limiting groove; 405. positioning rod; 406. torsion spring; 5. detection head. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-Figure 3 In an embodiment of the utility model, a Rockwell hardness tester includes a detector housing 1, a lifting platform 2 extending to the outside of the detector housing 1 is vertically slidably installed on the inner wall of the detector housing 1, a lifting wheel 3 rotatably connected to the detector housing 1 is threadedly sleeved on the outer wall of the lifting platform 2, a detection head 5 for hardness detection of materials is arranged on the inner side of the detector housing 1 and located directly above the lifting platform 2, and a limit mechanism 4 is arranged on the detector housing 1;

[0028] The limiting mechanism 4 includes a limiting unit and a resetting unit;

[0029] The limiting unit is used to provide friction force for the rotation of the lifting wheel 3;

[0030] The reset unit is used to provide the limiting unit with a torque that always fits the outer wall of the lifting wheel 3;

[0031] The limiting unit includes a rotating rod 401, a rubber block 402, a movable rod 403, and a limiting groove 404;

[0032] The rotating rod 401 is rotatably mounted inside the detector housing 1 and extends to the outer wall of the detector housing 1. The rotating rod 401 is used to synchronously drive the rubber block 402 to rotate;

[0033] The rubber block 402 is fixed to the outer wall of the rotating rod 401. The rotated rubber block 402 is used to press against the outer wall of the lifting wheel 3 to increase the rotation friction of the lifting wheel 3.

[0034] The movable rod 403 is vertically slidably mounted on the inner wall of the rotating rod 401 and extends to the outside of the rotating rod 401. The movable rod 403 is used to cooperate with the limiting groove 404 to limit the rotation of the rotating rod 401.

[0035] The limiting groove 404 is provided on the outer wall of the detector housing 1, and the limiting groove 404 is used to provide space for the movable rod 403 to enter;

[0036] The reset unit includes a positioning rod 405 and a torsion spring 406;

[0037] The positioning rod 405 is fixed to the bottom end of the rotating rod 401 and is rotatably connected to the inner wall of the detector housing 1. The positioning rod 405 is used to provide support for the rotation of the rotating rod 401.

[0038] The two ends of the torsion spring 406 are respectively clamped on the outer wall of the detector housing 1 and fixed on the bottom end of the rotating rod 401 . The torsion spring 406 is sleeved on the outer wall of the positioning rod 405 . The torsion spring 406 is used to provide torque for the rotation of the rotating rod 401 .

[0039] In this embodiment: when using this device, by placing the material to be detected at the top position of the lifting platform 2, and then rotating the lifting wheel 3 clockwise, the rotating lifting wheel 3 will drive the lifting platform 2 to move upward through the thread, so that the material at the top of the lifting platform 2 contacts the outer wall of the detection head 5, and then, give an upward thrust to the movable rod 403 located inside the limiting groove 404, so that the movable rod 403 moves upward along the vertical sliding groove on the outer wall of the rotating rod 401 until the movable rod 403 disengages from the limiting groove 404. The disengaged movable rod 403 will no longer limit the rotation of the rotating rod 401, so that the rotating rod 401 drives the positioning rod 405 and the rotating rod 401 to rotate synchronously under the torsion of the torsion spring 406. The rotating rotating rod 401 will synchronously drive the rubber block 402 with the outer wall fixed to rotate, so that the outer wall of the rubber block 402 is in close contact with the outer wall of the lifting wheel 3, so that when the lifting wheel 3 is subjected to a counterclockwise external force, the lifting wheel 3 will be subjected to the resistance from the rubber block 402, which will offset the force exerted on the lifting wheel 3, thereby preventing the lifting platform 2 from descending due to accidental touch, thereby ensuring the accuracy of the measurement (it should be supplemented that when the lifting wheel 3 is at the bottom initial position, its bottom is lower than the top of the bottom part of the detector housing 1, and a hole groove is formed on the bottom part of the detector housing 1 for accommodating the bottom of the lifting wheel 3. When the lifting wheel 3 moves up, its outer wall can always be in contact with the rubber block 402).

[0040] Please refer to Figure 1-Figure 3 The outer wall of the rotating rod 401 is formed with a vertical sliding groove for the movable rod 403 to move up and down. The outer wall of the movable rod 403 matches the inner side of the limiting groove 404. The rubber block 402 and the movable rod 403 are distributed at 90 degrees on the outer wall of the rotating rod 401. The length of the rotating rod 401 is longer than the length accommodated by the limiting groove 404. The rotation direction of the lifting wheel 3 is the same as the direction of the torque exerted on the rotating rod 401 by the torsion spring 406.

[0041] In this embodiment: through this structure, when the movable rod 403 is in the inner cavity of the limit groove 404, the end of the movable rod 403 is exposed to the outside of the detector housing 1, so that the user can quickly release the rotation limit of the rotating rod 401, and the rotating rod 401 and the lifting wheel 3 with the same rotation direction can make the rubber block 402 contact with the lifting wheel 3 without affecting the clockwise rotation of the lifting wheel 3.

[0042] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A Rockwell hardness tester, comprising a detector housing (1), a lifting platform (2) extending to the outside of the detector housing (1) being vertically slidably mounted on the inner wall of the detector housing (1), a lifting wheel (3) rotatably connected to the detector housing (1) being threadedly sleeved on the outer wall of the lifting platform (2), a detection head (5) for detecting hardness of a material being arranged on the inner side of the detector housing (1) and located directly above the lifting platform (2), characterized in that: A limiting mechanism (4) disposed on the detector housing (1); The limiting mechanism (4) comprises a limiting unit and a resetting unit; The limiting unit is used to provide friction force for the rotation of the lifting wheel (3); The reset unit is used to provide the limiting unit with a torque that always fits the outer wall of the lifting wheel (3).

2. A Rockwell hardness tester according to claim 1, characterized in that: The limiting unit comprises a rotating rod (401), a rubber block (402), a movable rod (403), and a limiting groove (404); The rotating rod (401) is rotatably mounted inside the detector housing (1) and extends to the outer wall of the detector housing (1), and the rotating rod (401) is used to synchronously drive the rubber block (402) to rotate; The rubber block (402) is fixed to the outer wall of the rotating rod (401), and after rotation, the rubber block (402) is used to abut against the outer wall of the lifting wheel (3) to increase the rotational friction of the lifting wheel (3); The movable rod (403) is vertically slidably mounted on the inner wall of the rotating rod (401) and extends to the outside of the rotating rod (401); the movable rod (403) is used to cooperate with the limiting groove (404) to limit the rotation of the rotating rod (401); The limiting groove (404) is provided on the outer wall of the detector housing (1), and the limiting groove (404) is used to provide space for the movable rod (403) to enter.

3. A Rockwell hardness tester according to claim 1, characterized in that: The resetting unit comprises a positioning rod (405) and a torsion spring (406); The positioning rod (405) is fixed to the bottom end of the rotating rod (401) and is rotatably connected to the inner wall of the detector housing (1), and the positioning rod (405) is used to provide support for the rotation of the rotating rod (401); The two ends of the torsion spring (406) are respectively clamped on the outer wall of the detector housing (1) and fixed on the bottom end of the rotating rod (401), and the torsion spring (406) is sleeved on the outer wall of the positioning rod (405). The torsion spring (406) is used to provide torque for the rotation of the rotating rod (401).

4. A Rockwell hardness tester according to claim 2, characterized in that: The outer wall of the rotating rod (401) is formed with a vertical sliding groove for the movable rod (403) to move up and down, and the outer wall of the movable rod (403) matches the inner side of the limiting groove (404).

5. A Rockwell hardness tester according to claim 2, characterized in that: The rubber block (402) and the movable rod (403) are distributed at 90 degrees on the outer wall of the rotating rod (401), and the length of the rotating rod (401) is longer than the length accommodated by the limiting groove (404).

6. A Rockwell hardness tester according to claim 3, characterized in that: The rotation direction of the lifting wheel (3) is the same as the direction of the torsion force exerted on the rotating rod (401) by the torsion spring (406).

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