A damage-resistant detection head with a pressing roller and an elastic reset element

Abstract

This invention discloses a damage-resistant testing indenter with a pressing roller and an elastic reset component, relating to the field of testing instrument technology. The damage-resistant testing indenter includes a pressure body, a buffer cavity slidably connected inside the pressure body, a cavity bottom fixedly connected to the bottom of the buffer cavity, a pressure rod slidably connected inside the cavity bottom via a spring, a groove provided on the outer surface of the pressure rod, a positioning buffer assembly provided at the bottom of the cavity bottom, and a secondary buffer assembly provided at the top of the pressure rod. This damage-resistant testing indenter, by setting up the positioning buffer assembly, the secondary buffer assembly, the buffer cavity, and the pressure rod, achieves graded buffering and constraint release, ultimately achieving linear force application of the indenter to the test piece, avoiding deformation of the test piece caused by excessive force and edge stress concentration, and ensuring the validity of the test results.

Description

Technical Field

[0001] This invention relates to the field of testing instrument technology, specifically to a damage-resistant testing head with a pressing roller and an elastic reset component. Background Technology

[0002] The indenter is an instrument component, mainly used for hardness testing, and also for reverse bending tests and other occasions. It is a component on the hardness tester used to press the test piece in and has a specified switch.

[0003] During the testing process, the indenter comes into contact with the workpiece. Due to errors in the contact point between the indenter and the workpiece, edge stress concentration can easily occur, causing deformation of the workpiece and affecting the validity of the test results. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a damage-resistant detection head with a pressing roller and an elastic reset component, thereby solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a damage-resistant detection pressure head with a pressing roller and an elastic reset component, comprising a pressure body, an mounting head fixedly connected to the top of the pressure body, a buffer cavity slidably connected inside the pressure body, a cavity bottom fixedly connected to the bottom of the buffer cavity, a pressure rod slidably connected inside the cavity bottom via a spring, a groove provided on the outer surface of the pressure rod, a positioning buffer assembly provided at the bottom of the cavity bottom, and a secondary buffer assembly provided at the top of the pressure rod;

[0006] The positioning buffer component includes:

[0007] A buffer roller, the buffer roller comprising a swing arm rotatably connected to the bottom of the cavity, and a pressing roller rotatably connected to the end of the swing arm;

[0008] A limiting lifting plate is slidably connected to the bottom of the swing arm body via a spring, and the limiting lifting plate is located at the top of the swing arm body.

[0009] Preferably, a top rod is slidably connected inside the buffer cavity via a spring. The top rod is located at the top of the buffer cavity, and the outer side of the top of the top rod is inclined. A constraint block is provided inside the buffer cavity. The constraint block includes a block body slidably connected inside the buffer cavity via a spring. One inner end of the block body is located in the groove of the pressure rod, and a first mating plate is fixedly connected to the outer end of the block body. The first mating plate is located at the top of the block body.

[0010] Preferably, the secondary buffer assembly includes a trigger ring fixedly connected to the top of the pressure rod. The inner side of the outer surface of the trigger ring is a downwardly inclined slope. A release slide rod is provided inside the buffer cavity. The release slide rod includes a locking rod that is slidably connected to the inside of the buffer cavity by a spring. One outer end of the locking rod is engaged with the inner side of the outer surface of the pressure body. A second mating plate is fixedly connected to one inner end of the locking rod. The second mating plate is located at the top of the trigger ring.

[0011] Preferably, a sliding block is fixedly connected to the outer surface of the buffer cavity, a sliding groove is provided on the inner side of the outer surface of the pressure body, a return spring is fixedly connected to the top of the buffer cavity, and the other end of the return spring is fixedly connected to the bottom of the mounting head.

[0012] Preferably, the bottom of the pressure rod is rotatably connected to a contact steel ball via a spherical groove, and the outer surface of the contact steel ball is covered with an elastic layer.

[0013] Preferably, the number of the positioning buffer assembly and the release slide bar is greater than or equal to two.

[0014] This invention provides a damage-resistant detection pressure head with a pressing roller and an elastic reset element. It has the following advantages:

[0015] This anti-damage testing head, featuring a pressing roller and an elastic reset component, utilizes a positioning buffer assembly, a secondary buffer assembly, a buffer chamber, a pressure rod, and a reset spring. The positioning buffer assembly employs the cooperation of the buffer roller, limit lifting plate, top rod, and constraint block to achieve auxiliary positioning and initial buffering, releasing the pressure rod constraint. The secondary buffer assembly utilizes the cooperation of the trigger ring and the release slide rod to achieve a second buffering and release the buffer chamber constraint. Simultaneously, the cooperation of the buffer chamber and the reset spring achieves elastic reset, ultimately realizing linear force application of the pressure head to the test piece. This avoids deformation caused by edge stress concentration and excessive force, ensuring the validity of the test results. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall front structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the overall bottom structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the internal structure of the press body of the present invention;

[0019] Figure 4 This is a cross-sectional view of the overall internal structure of the present invention;

[0020] Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at point A;

[0021] Figure 6For the present invention Figure 4 Enlarged schematic diagram of the structure at point B.

[0022] In the diagram: 1. Pressing body; 2. Mounting head; 3. Buffer chamber; 31. Slide block; 32. Return spring; 4. Cavity bottom; 5. Pressing rod; 51. Contact steel ball; 6. Positioning buffer assembly; 61. Buffer roller; 611. Swing rod body; 612. Pressing roller; 62. Limiting lifting plate; 63. Top rod; 64. Constraint block; 641. Block; 642. First mating plate; 7. Secondary buffer assembly; 71. Trigger ring; 72. Release slide rod; 721. Locking rod; 722. Second mating plate. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0025] Example

[0026] Please see Figure 1-6 This invention provides a technical solution: a damage-resistant detection pressure head with a pressing roller and an elastic reset component, comprising a pressure body 1, a mounting head 2 fixedly connected to the top of the pressure body 1, a pressure sensor arranged between the pressure body 1 and the mounting head 2 for feedback of applied pressure data, a buffer cavity 3 slidably connected inside the pressure body 1, a through hole penetrating the top of the buffer cavity 3, a chamfered through hole provided inside the buffer cavity 3, one end of the chamfered through hole communicating with the through hole at the top of the buffer cavity 3, and the other end communicating with the bottom of the buffer cavity 3, a radial through hole penetrating the buffer cavity 3, the radial through hole being located at the top of the chamfered through hole, and a sliding block 31 fixedly connected to the outer surface of the buffer cavity 3. A groove is provided on the inner side of the outer surface of the pressure body 1. A return spring 32 is fixedly connected to the top of the buffer cavity 3, and the other end of the return spring 32 is fixedly connected to the bottom of the mounting head 2. A cavity bottom 4 is fixedly connected to the bottom of the buffer cavity 3. A blind groove is provided on the bottom edge of the cavity bottom 4. A slope surface is provided on the side of the blind groove at the bottom of the cavity bottom 4. A pressure rod 5 is slidably connected to the inside of the cavity bottom 4 through a spring. A groove is provided on the outer surface of the pressure rod 5. A contact steel ball 51 is rotatably connected to the bottom of the pressure rod 5 through a spherical groove. An elastic layer is covered on the outer surface of the contact steel ball 51. A positioning buffer assembly 6 is provided at the bottom of the cavity bottom 4. The number of positioning buffer assemblies 6 is greater than or equal to two. The positioning buffer assembly 6 includes:

[0027] The buffer roller 61 includes a swing rod body 611 rotatably connected to the bottom blind groove of the cavity bottom 4. A pressing roller 612 is rotatably connected to the end of the swing rod body 611. The bottom position of the pressing roller 612 is lower than the bottom position of the contact steel ball 51.

[0028] Limiting lifting plate 62 is slidably connected to the bottom of the swing rod body 611 by a spring. The limiting lifting plate 62 is located at the top of the swing rod body 611. The bottom of the limiting lifting plate 62 is a slope, and the slope direction is consistent with the top surface of the swing rod body 611.

[0029] The push rod 63 is slidably connected to the buffer cavity 3 by a spring. The push rod 63 has a through groove on its front side, which is used to fix the spring. The push rod 63 is located at the top of the buffer cavity 3, and the outward side of the top of the push rod 63 is a slope.

[0030] The constraint block 64 is provided inside the buffer cavity 3. The constraint block 64 includes a block 641 that is slidably connected to the inside of the buffer cavity 3 by a spring. The front of the block 641 has a through groove for fixing the spring. One end of the inner side of the block 641 is located in the groove of the pressure rod 5. One end of the outer side of the block 641 is fixedly connected to a first mating plate 642, which is located at the top of the block 641.

[0031] A secondary buffer assembly 7 is provided at the top of the pressure rod 5. The secondary buffer assembly 7 includes a trigger ring 71 fixedly connected to the top of the pressure rod 5. The inner side of the outer surface of the trigger ring 71 is a downwardly inclined slope. A release slide rod 72 is provided inside the buffer cavity 3. The release slide rod 72 includes a locking rod 721 slidably connected to the inside of the buffer cavity 3 by a spring. One outer end of the locking rod 721 is engaged with the inner side of the outer surface of the pressure body 1. One inner end of the locking rod 721 is fixedly connected to a second mating plate 722. The second mating plate 722 is located at the top of the trigger ring 71. The number of release slide rods 72 is greater than or equal to two.

[0032] In use, the pressure head is installed in the mounting position of the testing equipment using the mounting head 2. After installation, the contact steel ball 51 is aligned with the force application point of the test piece. Then, the entire pressure head moves downward. The pressing roller 612 first contacts the surface around the force application point of the test piece. The pressing roller 612 drives the swing rod body 611 to rotate relative to each other. The swing rod body 611 rotates and lifts the limit lifting plate 62 to achieve auxiliary positioning and the first buffer. The limit lifting plate 62 lifts the top rod 63. The top rod 63 pushes the first mating plate 642 outward. The first mating plate 642 drives the block 641 to slide outward. The pressure rod 5 and the block... The constraints between bodies 641 are released, the contact steel ball 51 contacts the point of force application on the workpiece, and the pressure rod 5 slides relative to the buffer cavity 3 until the trigger ring 71 pushes out the second mating plate 722. The second mating plate 722 drives the clamping rod 721 to slide out, releasing the constraint relationship between the buffer cavity 3 and the pressure body 1 and the clamping rod 721. The buffer cavity 3 and the pressure rod 5 slide relative to the pressure body 1, completing the second buffering. Until the pressure body 1 slides to the limit position of the buffer cavity 3, the entire pressure head continues to apply force downward to the workpiece, thereby achieving linear force application and preventing excessive force application from causing deformation of the workpiece.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A damage-resistant detection pressure head with a pressing roller and an elastic reset element, comprising a pressure body (1), wherein a mounting head (2) is fixedly connected to the top of the pressure body (1), characterized in that: The pressure body (1) has a buffer cavity (3) slidably connected inside. The bottom of the buffer cavity (3) is fixedly connected to the bottom of the cavity (4). The bottom of the cavity (4) is slidably connected to the pressure rod (5) by a spring. The outer surface of the pressure rod (5) is provided with a groove. The bottom of the cavity (4) is provided with a positioning buffer assembly (6). The top of the pressure rod (5) is provided with a secondary buffer assembly (7). The positioning buffer component (6) includes: The buffer roller (61) includes a rocker arm (611) rotatably connected to the bottom of the cavity bottom (4), and a pressing roller (612) is rotatably connected to the end of the rocker arm (611). The limiting lifting plate (62) is slidably connected to the bottom of the swing rod body (611) by a spring, and the limiting lifting plate (62) is located at the top of the swing rod body (611).

2. The anti-damage detection pressure head with a pressing roller and an elastic reset component according to claim 1, characterized in that: Inside the buffer cavity (3), a top rod (63) is slidably connected by a spring. The top rod (63) is located at the top of the buffer cavity (3). Inside the buffer cavity (3), a constraint block (64) is provided. The constraint block (64) includes a block (641) slidably connected to the inside of the buffer cavity (3) by a spring. One end of the inner side of the block (641) is located in the groove of the pressure rod (5). One end of the outer side of the block (641) is fixedly connected to a first mating plate (642). The first mating plate (642) is located at the top of the block (641).

3. The anti-damage detection pressure head with a pressing roller and an elastic reset component according to claim 2, characterized in that: The secondary buffer assembly (7) includes a trigger ring (71) fixedly connected to the top of the pressure rod (5). The inner side of the outer surface of the trigger ring (71) is a downward inclined surface. The buffer cavity (3) is provided with a release slide rod (72). The release slide rod (72) includes a locking rod (721) slidably connected to the inside of the buffer cavity (3) by a spring. One end of the locking rod (721) is engaged with the inner side of the outer surface of the pressure body (1). One end of the locking rod (721) is fixedly connected to a second mating plate (722). The second mating plate (722) is located at the top of the trigger ring (71).

4. The anti-damage detection pressure head with a pressing roller and an elastic reset component according to claim 3, characterized in that: A sliding block (31) is fixedly connected to the outer surface of the buffer cavity (3), and a sliding groove is provided on the inner side of the outer surface of the pressure body (1). A reset spring (32) is fixedly connected to the top of the buffer cavity (3), and the other end of the reset spring (32) is fixedly connected to the bottom of the mounting head (2).

5. The anti-damage detection pressure head with a pressing roller and an elastic reset component according to claim 3, characterized in that: The bottom of the pressure rod (5) is rotatably connected to a contact steel ball (51) via a spherical groove.

6. The anti-damage detection pressure head with a pressing roller and an elastic reset component according to claim 3, characterized in that: The number of the positioning buffer assembly (6) and the release slide bar (72) is greater than or equal to two.

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