Automatic lifting mechanism of Rockwell hardness tester

Abstract

The utility model discloses an automatic lifting mechanism of a Rockwell hardness tester, which relates to the lifting field of hardness testers, and comprises an outer frame consisting of a box body, a connecting plate and a supporting plate, the connecting plate is connected to the edge of one end between the box body and the connecting plate, a driving mechanism is arranged in the box body, and the supporting plate is connected with the box body. The driving mechanism is used for driving the screw rod to lift; the bottom end of the screw rod is fixedly connected with a mounting plate through a bolt, the other end of the top end of the mounting plate is provided with a pressure sensor, and the bottom end of the pressure sensor is connected with an extrusion head penetrating to the lower part of the mounting plate; anti-collision mechanisms are distributed on the connecting plate and the supporting plate. According to the utility model, the infrared transmitter and the infrared receiver are arranged, the top surface of the infrared transmitter is flush with the top surface of the supporting plate, and the bottom surface of the infrared receiver is flush with the lowest point of the extrusion head, so that collision caused by mistaken touch can be prevented, and hardness detection on a thinner object can be realized.

Description

Technical Field

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

[0002] Under specified conditions, the indenter (diamond cone, steel ball or carbide ball) is pressed into the surface of the sample object. After the main test force is removed, the residual depth h of the indentation is measured under the initial test force. The residual depth h of the indentation represents the degree of hardness.

[0003] In the prior art, there is a situation where the object has not been placed in the area to be tested or has not been placed accurately in the area to be tested, that is, the screw moves down due to an accidental touch. At this time, the extrusion head is likely to squeeze the support plate itself, causing surface defects on the device and easily damaging the device. Utility Model Content

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

[0005] To achieve the above object, the utility model provides the following technical solutions: an automatic lifting mechanism for a Rockwell hardness tester, comprising an outer frame composed of a box body, a connecting plate, and a supporting plate, wherein the connecting plate is connected to one end edge between the box body and the connecting plate, and a driving mechanism is installed inside the box body, and the driving mechanism is used to drive a screw rod to lift;

[0006] The bottom end of the screw rod is fixedly connected to a mounting plate by bolts, a pressure sensor is installed at the other end of the top of the mounting plate, and the bottom end of the pressure sensor is connected to an extrusion head that penetrates below the mounting plate;

[0007] The connecting plate and the supporting plate are provided with anti-collision mechanisms, and the anti-collision mechanisms are used to prevent the connecting plate from colliding with the top end of the supporting plate.

[0008] As a further solution of the utility model: the driving mechanism includes a worm rotatably mounted in the inner cavity of the box, the outer wall of the worm is meshed with a worm wheel, the upper and lower ends of the worm wheel are equipped with limit bearings, and the limit bearings are fixedly connected to the inner wall of the box;

[0009] A screw hole is provided at the center of the worm wheel, and the screw hole is threadedly connected to the screw rod. A forward and reverse motor is installed outside the box body, and the output end of the forward and reverse motor is connected to the shaft at one end of the worm rod through a coupling.

[0010] As a further solution of the utility model: the anti-collision mechanism includes a slide groove vertically opened on the connecting plate, and the inner wall of the slide groove is slidably connected to an infrared emitter up and down;

[0011] The top of the support plate is provided with a downwardly recessed receiving groove, an infrared receiver is installed on the inner wall of the receiving groove, and the infrared receiver is aligned with the infrared transmitter in the upper and lower positions;

[0012] One end of the infrared emitter is fixedly connected to the outer wall of the mounting plate through a connecting frame.

[0013] As a further solution of the utility model: the infrared transmitter and the infrared receiver are both electrically connected to an external power source through wires, and the infrared receiver is electrically connected to the forward and reverse motor through a controller.

[0014] As a further solution of the utility model: a limiting column extending vertically upward is welded to the top end of the support plate, and a limiting groove matching the outer wall of the limiting column is formed inside the mounting plate and the screw.

[0015] As a further solution of the utility model: the bottom surface of the infrared transmitter is flush with the lowest point of the extrusion head, and the top surface of the infrared receiver is flush with the top surface of the support plate.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. By setting up an infrared transmitter and an infrared receiver, and the top surface of the infrared transmitter is flush with the top surface of the support plate, and the bottom surface of the infrared receiver is flush with the lowest point of the extrusion head, it can prevent collisions caused by accidental touches and also realize hardness detection of thinner objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a structural schematic diagram of another viewing angle of the utility model;

[0020] Figure 3 It is a schematic diagram of the installation of the worm and worm wheel of the utility model.

[0021] In the figure: 1. Box body; 2. Connecting plate; 3. Support plate; 4. Screw; 5. Slide; 6. Connecting frame; 7. Mounting plate; 8. Pressure sensor; 9. Extrusion head; 10. Limiting column; 11. Infrared receiver; 12. Infrared transmitter; 13. Forward and reverse motor; 14. Worm; 15. Worm wheel; 16. Limiting groove. DETAILED DESCRIPTION

[0022] 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.

[0023] See also Figure 1 to Figure 3 In the embodiment of the utility model, the automatic lifting mechanism of the Rockwell hardness tester includes an outer frame composed of a box body 1, a connecting plate 2, and a supporting plate 3. The connecting plate 2 is connected to the edge of one end between the box body 1 and the connecting plate 2. A driving mechanism is installed inside the box body 1, and the driving mechanism is used to drive the screw 4 to lift;

[0024] The bottom end of the screw rod 4 is fixedly connected to a mounting plate 7 by bolts, a pressure sensor 8 is installed at the other end of the top of the mounting plate 7, and the bottom end of the pressure sensor 8 is connected to an extrusion head 9 that penetrates to the bottom of the mounting plate 7;

[0025] The connecting plate 2 and the supporting plate 3 are provided with anti-collision mechanisms, and the anti-collision mechanisms are used to prevent the top ends of the connecting plate 2 and the supporting plate 3 from colliding.

[0026] In this embodiment: by starting the forward and reverse motor 13, the forward and reverse motor 13 drives the driving mechanism to move, the driving mechanism drives the screw 4 to move up and down, and the screw 4 drives the pressure sensor 8 and the extrusion head 9 at the bottom thereof to move downward through the mounting plate 7 to extrude the object to be tested, thereby realizing hardness testing;

[0027] When using the device, if an accidental touch occurs, the mounting plate 7 drives the anti-collision mechanism to move during the descent process. When the extrusion head 9 is about to contact and squeeze the support plate 3, the anti-collision mechanism sends an electrical signal to the controller, and the controller controls the forward and reverse motor 13 to rotate in the opposite direction, thereby resetting the mounting plate 7.

[0028] Please refer to Figure 3 The driving mechanism includes a worm 14 rotatably mounted in the inner cavity of the housing 1, the outer wall of the worm 14 is meshed with a worm wheel 15, and the upper and lower ends of the worm wheel 15 are equipped with limit bearings, and the limit bearings are fixedly connected to the inner wall of the housing 1;

[0029] A screw hole is provided at the center of the worm wheel 15, which is threadedly connected to the screw rod 4. A forward and reverse motor 13 is installed outside the box body 1, and the output end of the forward and reverse motor 13 is connected to the shaft of one end of the worm rod 14 through a coupling.

[0030] In this embodiment: the forward and reverse motor 13 runs, driving the worm 14 to rotate through the coupling, and the worm 14 squeezes the tooth block of the worm wheel 15 when rotating, so that the worm wheel 15 rotates, and the screw hole at the center of the worm wheel 15 rotates accordingly;

[0031] The screw rod 4 cannot rotate due to being limited, and at this time the screw rod 4 moves up and down under the action of the rotational force.

[0032] Please refer to Figure 1 , Figure 2 and Figure 3 The anti-collision mechanism includes a slide groove 5 vertically opened on the connecting plate 2, and an infrared emitter 12 is slidably connected to the inner wall of the slide groove 5 up and down;

[0033] A downwardly concave receiving groove is provided at the top of the support plate 3, and an infrared receiver 11 is installed on the inner wall of the receiving groove. The infrared receiver 11 is aligned with the infrared transmitter 12 in the upper and lower positions;

[0034] One end of the infrared emitter 12 is fixedly connected to the outer wall of the mounting plate 7 through the connecting frame 6;

[0035] The infrared transmitter 12 and the infrared receiver 11 are both electrically connected to an external power source through wires, and the infrared receiver 11 is electrically connected to the forward and reverse motor 13 through a controller.

[0036] In this embodiment: before the object to be tested is placed at the top position to be tested of the support plate 3, if the start switch is touched by mistake, when the screw rod 4 drives the mounting plate 7 to move downward, the mounting plate 7 drives the housing of the infrared receiver 11 to slide downward on the inner wall of the slide groove 5 through the connecting frame 6. During this process, the distance between the infrared receiver 11 and the infrared transmitter 12 becomes closer and closer, so the time for the infrared rays emitted by the infrared transmitter 12 to be received by the infrared receiver 11 becomes shorter and shorter;

[0037] When the extrusion head 9 is about to contact the top of the support plate 3, the infrared ray is received by the infrared receiver 11 within the preset minimum time, and the chip in the infrared receiver 11 transmits an electrical signal to the controller. After receiving the electrical signal, the controller controls the forward and reverse motor 13 to rotate in the opposite direction, thereby avoiding the extrusion head 9 from colliding with the support plate 3.

[0038] Please refer to the figure in particular. A limiting column 10 extending vertically upward is welded to the top of the support plate 3, and a limiting groove 16 that matches the outer wall of the limiting column 10 is opened inside the mounting plate 7 and the screw rod 4.

[0039] In this embodiment, the cross section of the limiting column 10 is a polygonal structure, thereby limiting the rotation of the screw rod 4, so that the screw rod 4 can only perform lifting actions but cannot perform rotation actions.

[0040] Please refer to Figure 3 The bottom surface of the infrared transmitter 12 is flush with the lowest point of the extrusion head 9 , and the top surface of the infrared receiver 11 is flush with the top surface of the support plate 3 .

[0041] In this embodiment: when the extrusion head 9 and the support plate 3 are at the shortest distance, the distance between the infrared transmitter 11 and the infrared receiver 12 is also at the shortest state, and at this time, the infrared ray will be received by the infrared receiver 11 within the preset shortest time;

[0042] At the same time, this setting can avoid the inability to detect thinner objects.

[0043] 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. An automatic lifting mechanism for a Rockwell hardness tester, comprising an outer frame consisting of a box body (1), a connecting plate (2), and a support plate (3), wherein the connecting plate (2) is connected to an edge of one end between the box body (1) and the connecting plate (2), characterized in that: A driving mechanism is installed inside the box (1), and the driving mechanism is used to drive the screw rod (4) to move up and down; The bottom end of the screw rod (4) is fixedly connected to a mounting plate (7) by means of bolts, a pressure sensor (8) is mounted on the other end of the top end of the mounting plate (7), and the bottom end of the pressure sensor (8) is connected to an extrusion head (9) penetrating to the bottom of the mounting plate (7); The connecting plate (2) and the supporting plate (3) are provided with anti-collision mechanisms, and the anti-collision mechanisms are used to prevent the top ends of the connecting plate (2) and the supporting plate (3) from colliding.

2. The automatic lifting mechanism of the Rockwell hardness tester according to claim 1, characterized in that: The driving mechanism comprises a worm (14) rotatably mounted in the inner cavity of the housing (1), the outer wall of the worm (14) being meshed with a worm wheel (15), the upper and lower ends of the worm wheel (15) being equipped with limit bearings, the limit bearings being fixedly connected to the inner wall of the housing (1); A screw hole is provided at the center of the worm wheel (15), and the screw hole is threadedly connected to the screw rod (4). A forward and reverse motor (13) is installed outside the box (1), and the output end of the forward and reverse motor (13) is connected to the shaft at one end of the worm rod (14) through a coupling.

3. The automatic lifting mechanism of the Rockwell hardness tester according to claim 2, characterized in that: The anti-collision mechanism comprises a slide groove (5) vertically opened on the connecting plate (2), and an infrared emitter (12) is slidably connected to the inner wall of the slide groove (5) up and down; The top of the support plate (3) is provided with a downwardly recessed receiving groove, an infrared receiver (11) is installed on the inner wall of the receiving groove, and the infrared receiver (11) is aligned with the infrared transmitter (12) in upper and lower positions; One end of the infrared emitter (12) is fixedly connected to the outer wall of the mounting plate (7) via a connecting frame (6).

4. The automatic lifting mechanism of the Rockwell hardness tester according to claim 3, characterized in that: The infrared transmitter (12) and the infrared receiver (11) are both electrically connected to an external power source via wires, and the infrared receiver (11) is electrically connected to the forward and reverse motor (13) via a controller.

5. The automatic lifting mechanism of the Rockwell hardness tester according to claim 4, characterized in that: A limiting column (10) extending vertically upward is welded to the top end of the support plate (3), and a limiting groove (16) matching the outer wall of the limiting column (10) is formed inside the mounting plate (7) and the screw rod (4).

6. The automatic lifting mechanism of the Rockwell hardness tester according to claim 5, characterized in that: The bottom surface of the infrared transmitter (12) is flush with the lowest point of the extrusion head (9), and the top surface of the infrared receiver (11) is flush with the top surface of the support plate (3).

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