A high-precision Barthel hardness tester

Abstract

The present invention discloses a high-precision Barthel hardness tester, comprising: a housing; a support plate, which is arranged in the housing, and a displacement sensor is arranged at one end of the support plate; a first test leg, which is arranged in the other end of the support plate; a second test leg, which is arranged in the support plate; a first lever bracket, which is hingedly arranged on a side surface of the support plate through a first connecting rod, wherein one end of the first lever bracket is connected to the displacement rod of the displacement sensor, and the other end of the first lever bracket is hingedly arranged on one end of one side surface of the support plate; wherein the second test leg includes a detection needle and a moving column, a protrusion is arranged outside the moving column, and the first lever bracket is provided with a first supporting point connected to the protrusion to drive the displacement rod of the displacement sensor on one end of the first lever bracket to move. In the above manner, the high-precision Barthel hardness tester disclosed by the present invention can amplify the displacement amount moved by the detection needle, so that the hardness of the metal can be accurately measured.

Description

Technical Field

[0001] The invention relates to the technical field of hardness testers, and in particular to a high-precision Barthel hardness tester. Background Art

[0002] The metal hardness value indicates the ability of metal materials to resist hard objects pressing into their surface. It is one of the important performance indicators of metal materials. Generally, the higher the hardness, the better the wear resistance. Existing hardness testers include Leeb hardness tester, Brinell hardness tester, Barcol hardness tester and many other types.

[0003] At present, the most commonly used hardness tester on the market is the Barthel hardness tester. When using the Barthel hardness tester to measure the hardness of metal, the probe of the Barthel hardness tester is mainly pressed against the metal to measure the hardness of the metal by the displacement of the probe. However, since the hardness of the metal itself is relatively large, when the probe of the Barthel hardness tester is used to press the metal, the displacement of the probe is relatively small, and the displacement of the probe cannot be accurately determined, resulting in the inability to accurately measure the hardness of the metal. Summary of the invention

[0004] The main technical problem solved by the present invention is to provide a high-precision Barthel hardness tester, which can amplify the displacement of the detection needle and accurately determine the displacement of the detection needle, so as to accurately measure the hardness of the metal.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a high-precision Barthel hardness tester, including: a shell; a support plate, arranged in the shell, wherein a displacement sensor is arranged at one end of the support plate; a first test leg, arranged in the other end of the support plate; a second test leg, arranged in the support plate, wherein the second test leg is arranged between the displacement sensor and the first test leg; a first lever bracket, hingedly arranged on a side surface of the support plate through a first connecting rod, wherein one end of the first lever bracket is connected to the displacement rod of the displacement sensor, and the other end of the first lever bracket is hingedly arranged on the support plate One side of the first lever bracket is away from one end of the displacement sensor, and the distance between the end of one end of the first lever bracket and the first connecting rod is longer than the distance between the end of the other end of the first lever bracket and the first connecting rod; wherein the second test support leg includes a telescopic detection needle and a movable column connected to the detection needle, wherein a protrusion is provided on the outside of the movable column, and the first lever bracket is provided with a first supporting point connected to the protrusion, and the first supporting point is arranged between the first connecting rod and the top of one end of the first lever bracket, so as to drive the first supporting point to move through the protrusion, so as to drive the displacement rod of the displacement sensor on one end of the first lever bracket to move.

[0006] Among them, the support plate is provided with a first receiving groove and a first threaded hole and a second threaded hole arranged at both ends of the first receiving groove, the first threaded hole is arranged at the end of the support plate, and the second threaded hole is arranged at the bottom of the support plate, wherein the second test leg also includes a first adjustment part threadedly connected to the first threaded hole and a second adjustment part threadedly connected to the second threaded hole, wherein one end of the movable column can be moved in the first adjustment part, the other end of the movable column can be moved in the second adjustment part, and the protrusion is clamped outside the second adjustment part.

[0007] A first spring is arranged between the protrusion and the first adjusting part, one end of the moving column is inserted into the first spring, and the distance between the protrusion and the end of one end of the moving column is smaller than the length of the first spring in a normal state.

[0008] A first protective tube is disposed outside the detection needle, wherein the first protective tube is inserted into the second adjustment portion, and an end of the detection needle away from the first adjustment portion is connected to the first protective tube through a fixing member.

[0009] A second spring is provided at one end of the second adjusting part away from the first adjusting part, and the first protective tube is passed through the outside of the second spring, wherein the second spring is fixedly connected to one end away from the first adjusting part with the second protective tube, and the first protective tube is passed through the second protective tube.

[0010] The distance between the top of one end of the second protection tube away from the first adjusting part and the second adjusting part is longer than the distance between the top of one end of the detection needle away from the first adjusting part and the second adjusting part.

[0011] Among them, the first lever bracket includes a first horizontal support rod hingedly set on a side surface of the support plate through a first connecting rod, a first extension support rod extending in a direction away from the second adjusting portion, and a second horizontal support rod connected to the first extension support rod, wherein one end of the first horizontal support rod away from the first extension support rod is set in the second receiving groove of the support plate through a third spring, one end of the second horizontal support rod away from the first extension support rod is connected to the displacement rod of the displacement sensor, the first supporting point is set on one side end of the first horizontal support rod away from the first extension support rod, and the distance between the first supporting point and the top of one end of the first horizontal support rod is shorter than the distance between the first supporting point and the top of one end of the second horizontal support rod.

[0012] Among them, one side of the support plate is provided with a first support platform located below the first horizontal support rod and used to support the first horizontal support rod, a second support platform located below the second horizontal support rod and used to support the second horizontal support rod, and a first clamping platform located above the first horizontal support rod.

[0013] Wherein, it also includes: a second lever bracket, which is hingedly arranged on the other side of the support plate through the first connecting rod, wherein one end of the second lever bracket is connected to the displacement rod of the displacement sensor, and the other end of the second lever bracket is hingedly arranged on the other side of the support plate away from the displacement sensor, and the distance between the end of one end of the second lever bracket and the first connecting rod is longer than the distance between the end of the other end of the second lever bracket and the first connecting rod; wherein the second lever bracket is provided with a second supporting point connected to the protruding portion, and the second supporting point is arranged between the top of the first connecting rod and one end of the second lever bracket, so as to drive the second supporting point to move through the protruding portion, so as to drive the displacement rod of the displacement sensor on one end of the second lever bracket to move.

[0014] The second lever bracket includes a third horizontal support rod hingedly arranged on the other side of the support plate through the first connecting rod, a second extension support rod extending in a direction away from the second adjusting portion, and a fourth horizontal support rod connected to the second extension support rod, wherein one end of the third horizontal support rod away from the second extension support rod is arranged in a second receiving groove of the support plate through a third spring, one end of the fourth horizontal support rod away from the second extension support rod is connected to the displacement rod of the displacement sensor, the second support point is arranged on one side end of the third horizontal support rod away from the second extension support rod, and the distance between the second support point and the top of one end of the third horizontal support rod is shorter than the distance between the second support point and the top of one end of the fourth horizontal support rod; wherein the other side of the support plate is provided with a third support platform located below the third horizontal support rod and used to support the third horizontal support rod, a fourth support platform located below the fourth horizontal support rod and used to support the fourth horizontal support rod, and a second clamping platform located above the third horizontal support rod.

[0015] The beneficial effects of the present invention are as follows: different from the prior art, the high-precision Barthel hardness tester disclosed in the present invention comprises: a housing; a support plate, arranged in the housing, wherein a displacement sensor is arranged at one end of the support plate; a first test leg, arranged in the other end of the support plate; a second test leg, arranged in the support plate, wherein the second test leg is arranged between the displacement sensor and the first test leg; a first lever bracket, hingedly arranged on one side of the support plate through a first connecting rod, wherein one end of the first lever bracket is connected to the displacement rod of the displacement sensor, the other end of the first lever bracket is hingedly arranged on an end of a side of the support plate away from the displacement sensor, and the distance between the end of one end of the first lever bracket and the first connecting rod is longer than the distance between the end of the other end of the first lever bracket and the first connecting rod; wherein the second test leg comprises a retractable detection needle and a moving column connected to the detection needle, wherein a protrusion is arranged outside the moving column, and the first lever bracket is provided with a first supporting point connected to the protrusion, and the first supporting point is arranged between the first connecting rod and the top of one end of the first lever bracket, so as to drive the first supporting point to move through the protrusion, so as to drive the displacement rod of the displacement sensor on one end of the first lever bracket to move. In the above manner, the displacement of the detection needle of the high-precision Barthel hardness tester disclosed in the present invention can be amplified by the lever structure, and the displacement of the detection needle can be accurately determined, so that the hardness of the metal can be accurately measured. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the high-precision Barthel hardness tester of the present invention;

[0017] Figure 2 yes Figure 1 Schematic diagram of the first partial structure of a medium and high precision Barthel hardness tester;

[0018] Figure 3 yes Figure 1 Schematic diagram of the second partial structure of the medium and high precision Barthel hardness tester;

[0019] Figure 4 yes Figure 1 Schematic diagram of the third partial structure of the medium and high precision Barthel hardness tester;

[0020] Figure 5 yes Figure 1 Schematic diagram of the fourth partial structure of the medium and high precision Barthel hardness tester;

[0021] Figure 6 yes Figure 1 Schematic diagram of the fifth partial structure of the medium and high precision Barthel hardness tester;

[0022] Figure 7 yes Figure 1 Schematic diagram of the sixth partial structure of the medium and high precision Barthel hardness tester. DETAILED DESCRIPTION

[0023] See also Figure 1-7 The high-precision Barthel hardness tester includes a housing 10 , a support plate 11 , a first test leg 12 , a second test leg 13 , a first lever bracket 14 and a second lever bracket 15 .

[0024] The support plate 11 is disposed in the housing 10. Specifically, the housing 10 includes a first housing and a second housing, and the support plate 11 is disposed between the first housing and the second housing.

[0025] In this embodiment, a displacement sensor 110 is disposed at one end of the support plate 11. Specifically, a displacement rod of the displacement sensor 110 is disposed toward the top of the support plate 11.

[0026] The first test foot 12 is disposed in the other end of the support plate 10 .

[0027] The second test foot 13 is disposed in the support plate 10 , wherein the second test foot 13 is disposed between the displacement sensor 110 and the first test foot 12 .

[0028] The first lever bracket 14 is hingedly disposed on a side surface of the support plate 11 through a first connecting rod 141 .

[0029] In this embodiment, one end of the first lever bracket 14 is connected to the displacement rod of the displacement sensor 110 , and the other end of the first lever bracket 14 is hingedly disposed on an end of a side surface of the support plate 11 away from the displacement sensor 110 .

[0030] Preferably, a distance between an end of one end of the first lever bracket 14 and the first connecting rod 141 is longer than a distance between an end of the other end of the first lever bracket 14 and the first connecting rod 141 .

[0031] In this embodiment, the second test support leg 13 includes a retractable detection needle 131 and a moving column 132 connected to the detection needle 131. That is, when the detection needle 131 moves, the moving column 132 is pushed to move.

[0032] Furthermore, a protrusion 1321 is provided on the outside of the movable column 132, and the first lever bracket 14 is provided with a first support point 140 connected to the protrusion 1321. The first support point 140 is arranged between the first connecting rod 141 and the top of one end of the first lever bracket 14, so as to drive the first support point 140 to move through the protrusion 1321, so as to drive the displacement rod of the displacement sensor 110 on one end of the first lever bracket 14 to move.

[0033] In this embodiment, the support plate 11 is provided with a first receiving groove 1111 and a first threaded hole 1112 and a second threaded hole 1113 arranged at both ends of the first receiving groove 1111, wherein the first threaded hole 1112 is arranged at the end of the support plate 11, and the second threaded hole 1113 is arranged at the bottom of the support plate 11.

[0034] Furthermore, the second test leg 13 also includes a first adjustment portion 111 threadedly connected to the first threaded hole 1112 and a second adjustment portion 112 threadedly connected to the second threaded hole 1113, wherein one end of the movable column 132 is movably disposed in the first adjustment portion 111, the other end of the movable column 132 is movably disposed in the second adjustment portion 112, and the protrusion 1321 is clamped outside the second adjustment portion 112.

[0035] It should be understood that the first adjusting portion 111 is provided with a first external thread threadedly connected to the first threaded hole 1112, the second adjusting portion 112 is provided with a second external thread threadedly connected to the second threaded hole 1113, and the first adjusting portion 111 is provided with a first receiving hole at one end facing the second adjusting portion 112, one end of the movable column 132 is movably disposed in the first receiving hole, and the second adjusting portion 112 is provided with a first through hole, and the other end of the movable column 132 is movably disposed in the first through hole. Further, the protrusion 1321 is cylindrical, wherein the outer diameter of the protrusion 1321 is larger than the inner diameter of the first through hole, so that the protrusion 1321 is stuck outside the first through hole.

[0036] Further, in the present embodiment, a first spring 133 is provided between the protrusion 1321 and the first adjusting portion 111, one end of the moving column 132 is inserted into the first spring 133, and the distance between the protrusion 1321 and the end of one end of the moving column 132 is smaller than the length of the first spring 133 in a normal state. It should be understood that since the distance between the protrusion 1321 and the end of one end of the moving column 132 is smaller than the length of the first spring 133 in a normal state, in a normal state, the first spring 133 applies force to press the moving column 132 to move toward the second adjusting portion 112.

[0037] It is worth noting that, since the first adjustment portion 111 is threadedly connected in the first threaded hole 1112, the length of the first spring 133 can be adjusted by rotating the first adjustment portion 111 to adjust the force applied by the first spring 133 to the moving column 132. Furthermore, since the second adjustment portion 112 is threadedly connected in the second threaded hole 1113, the length of the first spring 133 can be adjusted by rotating the second adjustment portion 112 to adjust the force applied by the first spring 133 to the moving column 132.

[0038] In this embodiment, a first protective tube 134 is disposed outside the detection needle 131 , wherein the first protective tube 134 is inserted into the second adjustment portion 112 , and one end of the detection needle 131 away from the first adjustment portion 111 is connected to the first protective tube 134 via a fixing member 130 .

[0039] Furthermore, a second spring 135 is provided at one end of the second adjustment portion 112 away from the first adjustment portion 111, and the first protective tube 134 is passed through the outside of the second spring 135, wherein the end of the second spring 135 away from the first adjustment portion 111 is fixedly connected to a second protective tube 136, and the first protective tube 134 is passed through the second protective tube 136.

[0040] In this embodiment, the distance between the top of one end of the second protection tube 136 away from the first adjustment part 111 and the second adjustment part 112 is longer than the distance between the top of one end of the detection needle 131 away from the first adjustment part 111 and the second adjustment part 112. That is, in a normal state, the detection needle 131 is accommodated in the second protection tube 136. It should be understood that since one end of the second spring 135 is fixedly connected to the second protection tube 136, the second protection tube 136 is retractable, that is, when the second test leg 13 presses the metal, the second protection tube 136 is preferably subjected to force, so the second protection tube 136 contracts. When the second protection tube 136 contracts to a certain extent, the detection needle 131 contacts the metal, and the detection needle 131 starts to test the metal. When the detection needle 131 leaves the metal, the second protection tube 136 is pressed by the second spring 135 to restore the previous length.

[0041] In this embodiment, the first lever bracket 14 includes a first horizontal support rod 142 hingedly arranged on a side surface of the support plate 11 through a first connecting rod 141, a first extension support rod 143 extending in a direction away from the second adjustment portion 112, and a second horizontal support rod 144 connected to the first extension support rod 143. One end of the first horizontal support rod 142 away from the first extension support rod 143 is arranged in the second receiving slot 1114 of the support plate 11 through a third spring 116, and one end of the second horizontal support rod 144 away from the first extension support rod 143 is connected to the displacement rod of the displacement sensor 110.

[0042] Further, the first support point 140 is disposed on a side end of the first horizontal support rod 142 away from the first extension support rod 143, and the distance between the first support point 140 and the top of one end of the first horizontal support rod 142 is shorter than the distance between the first support point 140 and the top of one end of the second horizontal support rod 142. It should be understood that in this embodiment, the first connecting rod 141 is used as the fulcrum of the first lever bracket 14, and when the first support point 140 is squeezed by the protrusion 1321, the end of the first horizontal support rod 142 close to the third spring 116 rotates downward, and the other ends of the first horizontal support rod 142 and the first extension support rod 143 rotate upward, thereby driving the second horizontal support rod 144 to move downward. In addition, the distance between the top of one end of the first horizontal support rod 142 close to the third spring 116 and the first connecting rod 141 is shorter than the distance between the top of the other end of the first horizontal support rod 142 and the first extension support rod 143 and the first connecting rod 141, so the small displacement of the first support point 140 is amplified by the other end of the first horizontal support rod 142. Furthermore, the first extension support rod 143 extends in a direction away from the second adjustment portion 112, and the second horizontal support rod 144 is arranged on the end of the first extension support rod 143 away from the first horizontal support rod 142, so the small displacement of the first support point 140 is further amplified by the second horizontal support rod 144, so that the hardness of the metal can be accurately measured. Preferably, the first extension support rod 143 is inclined to the first horizontal support rod 142 and the second horizontal support rod 144. Alternatively, the first extension support rod 143 is vertically arranged to the first horizontal support rod 142 and the second horizontal support rod 144.

[0043] In this embodiment, a side surface of the support plate 11 is provided with a first support platform 113 located below the first horizontal support rod 142 and used to support the first horizontal support rod 142, a second support platform 114 located below the second horizontal support rod 144 and used to support the second horizontal support rod 144, and a first clamping platform 115 located above the first horizontal support rod 142. It should be understood that the first support platform 113, the second support platform 114 and the first clamping platform 115 are used to clamp the first lever bracket 14 so that the first lever bracket 14 will not deviate.

[0044] The second lever bracket 15 is hingedly disposed on the other side surface of the support plate 11 through the first connecting rod 141 .

[0045] In this embodiment, one end of the second lever bracket 15 is connected to the displacement rod of the displacement sensor 110, and the other end of the second lever bracket 15 is hingedly disposed on the other side of the support plate 11 away from the displacement sensor 110. It should be understood that one end of the first lever bracket 14 is connected to one end of the second lever bracket 15, and one end of the first lever bracket 14 and one end of the second lever bracket 15 are connected through the second connecting rod.

[0046] Preferably, a distance between an end of one end of the second lever bracket 15 and the first connecting rod 141 is longer than a distance between an end of the other end of the second lever bracket 15 and the first connecting rod 141 .

[0047] In this embodiment, the second lever bracket 15 is provided with a second support point 150 connected to the protrusion 1321, and the second support point 150 is arranged between the first connecting rod 141 and the top of one end of the second lever bracket 151, so as to drive the second support point 150 to move through the protrusion 132, so as to drive the displacement rod of the displacement sensor 110 on one end of the second lever bracket 15 to move. It should be understood that the first lever bracket 14 and the second lever bracket 15 of this embodiment are connected together, and can drive the displacement rod of the displacement sensor 110 to move together.

[0048] The second lever bracket 15 includes a third horizontal support rod 151 hingedly arranged on the other side of the support plate 11 through a first connecting rod 141, a second extension support rod 152 extending in a direction away from the second adjustment portion 112, and a fourth horizontal support rod 153 connected to the second extension support rod 152. One end of the third horizontal support rod 153 away from the second extension support rod 152 is arranged in the second receiving slot 1114 of the support plate 11 through a third spring 116, and one end of the fourth horizontal support rod 153 away from the second extension support rod 152 is connected to the displacement rod of the displacement sensor 110.

[0049] In this embodiment, the second support point 150 is disposed on one side end of the third horizontal support rod 151 away from the second extension support rod 152, and the distance between the second support point 150 and the top of one end of the third horizontal support rod 151 is shorter than the distance between the second support point 150 and the top of one end of the fourth horizontal support rod 153. It should be understood that in this embodiment, the first connecting rod 141 is used as the fulcrum of the second lever bracket 15, and when the second support point 150 is pressed by the protrusion 1321, the end of the third horizontal support rod 151 close to the third spring 116 rotates downward, and the other end of the third horizontal support rod 151 and the second extension support rod 152 rotates upward, thereby driving the fourth horizontal support rod 153 to move downward. In addition, the distance between the top of one end of the third horizontal support rod 151 close to the third spring 116 and the first connecting rod 141 is shorter than the distance between the top of the other end of the third horizontal support rod 151 and the second extension support rod 152 and the first connecting rod 141, so the small displacement of the second support point 150 is amplified by the other end of the third horizontal support rod 151. Furthermore, the second extension support rod 152 extends in a direction away from the second adjustment portion 112, and the fourth horizontal support rod 153 is arranged on one end of the second extension support rod 152 away from the third horizontal support rod 151, so the small displacement of the second support point 150 is further amplified by the fourth horizontal support rod 153, so that the hardness of the metal can be accurately measured. Preferably, the second extension support rod 152 is arranged obliquely with the third horizontal support rod 151 and the fourth horizontal support rod 153. Alternatively, the second extension support rod 152 is arranged vertically with the third horizontal support rod 151 and the fourth horizontal support rod 153.

[0050] In this embodiment, the other side of the support plate 11 is provided with a third support platform 117 located below the third horizontal support rod 151 and used to support the third horizontal support rod 151, a fourth support platform 118 located below the fourth horizontal support rod 153 and used to support the fourth horizontal support rod 153, and a second clamping platform 119 located above the third horizontal support rod 151. It should be understood that the third support platform 117, the fourth support platform 118 and the second clamping platform 119 are used to clamp the second lever bracket 15 so that the second lever bracket 15 will not deviate.

[0051] In summary, the high-precision Barthel hardness tester disclosed in the present invention includes: a shell; a support plate, which is arranged in the shell, wherein a displacement sensor is arranged at one end of the support plate; a first test leg, which is arranged in the other end of the support plate; a second test leg, which is arranged in the support plate, wherein the second test leg is arranged between the displacement sensor and the first test leg; a first lever bracket, which is hingedly arranged on one side surface of the support plate through a first connecting rod, wherein one end of the first lever bracket is connected to the displacement rod of the displacement sensor, and the other end of the first lever bracket is hingedly arranged on an end of a side surface of the support plate away from the displacement sensor, and the distance between the end of one end of the first lever bracket and the first connecting rod is longer than the distance between the end of the other end of the first lever bracket and the first connecting rod; wherein the second test leg includes a retractable detection needle and a moving column connected to the detection needle, wherein a protrusion is arranged on the outside of the moving column, and the first lever bracket is provided with a first supporting point connected to the protrusion, and the first supporting point is arranged between the first connecting rod and the top of one end of the first lever bracket, so as to drive the first supporting point to move through the protrusion, so as to drive the displacement rod of the displacement sensor on one end of the first lever bracket to move. In the above manner, the displacement of the detection needle of the high-precision Barthel hardness tester disclosed in the present invention can be amplified by the lever structure, and the displacement of the detection needle can be accurately determined, so that the hardness of the metal can be accurately measured.

[0052] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A high-precision Barthel hardness tester, characterized in that: include: case; A support plate is arranged in the housing, wherein a displacement sensor is arranged at one end of the support plate; A first test support leg is arranged at the other end of the support plate; A second test foot, disposed in the support plate, wherein the second test foot is disposed between the displacement sensor and the first test foot; A first lever bracket is hingedly arranged on one side of the support plate through a first connecting rod, wherein one end of the first lever bracket is connected to the displacement rod of the displacement sensor, and the other end of the first lever bracket is hingedly arranged on an end of a side surface of the support plate away from the displacement sensor, and the distance between the end of one end of the first lever bracket and the first connecting rod is longer than the distance between the end of the other end of the first lever bracket and the first connecting rod; Among them, the second test support leg includes a retractable detection needle and a movable column connected to the detection needle, wherein the movable column is provided with a protrusion on the outside, and the first lever bracket is provided with a first supporting point connected to the protrusion, and the first supporting point is arranged between the first connecting rod and the top of one end of the first lever bracket, so as to drive the first supporting point to move through the protrusion, so as to drive the displacement rod of the displacement sensor on one end of the first lever bracket to move.

2. The high-precision Barthel hardness tester according to claim 1, characterized in that: The support plate is provided with a first receiving groove and a first threaded hole and a second threaded hole arranged at both ends of the first receiving groove, the first threaded hole is arranged at the end of the support plate, and the second threaded hole is arranged at the bottom of the support plate, wherein the second test leg also includes a first adjustment portion threadedly connected to the first threaded hole and a second adjustment portion threadedly connected to the second threaded hole, wherein one end of the movable column can be moved in the first adjustment portion, the other end of the movable column can be moved in the second adjustment portion, and the protrusion is clamped outside the second adjustment portion.

3. The high-precision Barthel hardness tester according to claim 2, characterized in that: A first spring is arranged between the protrusion and the first adjusting portion, one end of the moving column is inserted into the first spring, and the distance between the protrusion and the end of one end of the moving column is smaller than the length of the first spring in a normal state.

4. The high-precision Barthel hardness tester according to claim 3, characterized in that: A first protective tube is disposed outside the detection needle, wherein the first protective tube is inserted into the second adjusting portion, and one end of the detection needle away from the first adjusting portion is connected to the first protective tube through a fixing member.

5. The high-precision Barthel hardness tester according to claim 4, characterized in that: A second spring is provided at one end of the second adjusting part away from the first adjusting part, and the first protective tube is passed through the outside of the second spring, wherein one end of the second spring away from the first adjusting part is fixedly connected to the second protective tube, and the first protective tube is passed through the inside of the second protective tube.

6. The high-precision Barthel hardness tester according to claim 5, characterized in that: A distance between a top of one end of the second protection tube away from the first adjustment portion and the second adjustment portion is longer than a distance between a top of one end of the detection needle away from the first adjustment portion and the second adjustment portion.

7. The high-precision Barthel hardness tester according to claim 6, characterized in that: The first lever bracket includes a first horizontal support rod hingedly arranged on a side surface of the support plate through the first connecting rod, a first extension support rod extending in a direction away from the second adjusting portion, and a second horizontal support rod connected to the first extension support rod, wherein one end of the first horizontal support rod away from the first extension support rod is arranged in a second receiving groove of the support plate through a third spring, one end of the second horizontal support rod away from the first extension support rod is connected to the displacement rod of the displacement sensor, the first supporting point is arranged on one side end of the first horizontal support rod away from the first extension support rod, and the distance between the first supporting point and the top of one end of the first horizontal support rod is shorter than the distance between the first supporting point and the top of one end of the second horizontal support rod.

8. The high-precision Barthel hardness tester according to claim 7, characterized in that: A first support platform located below the first horizontal support rod and used to support the first horizontal support rod, a second support platform located below the second horizontal support rod and used to support the second horizontal support rod, and a first clamping platform located above the first horizontal support rod are provided on one side of the support plate.

9. The high-precision Barthel hardness tester according to claim 8, characterized in that: Also includes: a second lever bracket, hingedly arranged on the other side of the support plate through the first connecting rod, wherein one end of the second lever bracket is connected to the displacement rod of the displacement sensor, and the other end of the second lever bracket is hingedly arranged on an end of the other side of the support plate away from the displacement sensor, and the distance between the end of one end of the second lever bracket and the first connecting rod is longer than the distance between the end of the other end of the second lever bracket and the first connecting rod; Among them, the second lever bracket is provided with a second supporting point connected to the protrusion, and the second supporting point is arranged between the first connecting rod and the top of one end of the second lever bracket, so as to drive the second supporting point to move through the protrusion, so as to drive the displacement rod of the displacement sensor on one end of the second lever bracket to move.

10. The high-precision Barthel hardness tester according to claim 9, characterized in that: The second lever bracket includes a third horizontal support rod hingedly arranged on the other side of the support plate through the first connecting rod, a second extension support rod extending in a direction away from the second adjusting portion, and a fourth horizontal support rod connected to the second extension support rod, wherein one end of the third horizontal support rod away from the second extension support rod is arranged in the second receiving groove of the support plate through the third spring, one end of the fourth horizontal support rod away from the second extension support rod is connected to the displacement rod of the displacement sensor, the second supporting point is arranged on one side end of the third horizontal support rod away from the second extension support rod, and the distance between the second supporting point and the top of one end of the third horizontal support rod is shorter than the distance between the second supporting point and the top of one end of the fourth horizontal support rod; Among them, the other side of the support plate is provided with a third support platform located below the third horizontal support rod and used to support the third horizontal support rod, a fourth support platform located below the fourth horizontal support rod and used to support the fourth horizontal support rod, and a second clamping platform located above the third horizontal support rod.

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