Force detection device with protection function

Abstract

The utility model discloses a force detection device with a protection function, which relates to the field of pressure detection, and comprises an upper stress plate, a force sensor is arranged on the lower surface of the upper stress plate, and the force sensor is electrically connected and communicated with a control box through a signal line and is used for feeding back the pressure applied to the upper stress plate by a pressure mechanism to be detected in real time; the lower stress plate is connected below the upper stress plate in a guiding manner through an upper guide rod; the upper bottom plate is placed on the lower stress plate, and an upper spring is arranged between the force sensor and the upper bottom plate; the lower bottom plate is connected below the lower stress plate in a guiding manner through a lower guide rod, and a lower spring is arranged between the lower bottom plate and the lower stress plate; and the limiting rod is mounted on the lower surface of the upper stress plate and is used for limiting the downward movement stroke of the upper stress plate. The utility model effectively solves the problem of lack of self-detection capability of the pressure sensor, and avoids the risk of sensor damage caused by improper range detection and selection of the pressure sensor.

Description

Technical Field

[0001] The utility model relates to the field of pressure detection, in particular to a force detection device with a protection function. Background Art

[0002] Presses, servo presses, and hydraulic presses all have built-in pressure sensors. Currently, there's no device that can easily and quickly calibrate and test these pressure sensors. Furthermore, existing force sensor calibration equipment lacks self-protection features, making it impossible to promptly verify pressure deviations after an abnormal impact. Utility Model Content

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and to provide a force detection device with a protective function, so as to solve the problem that the pressure sensor lacks self-detection capability and avoid the risk of sensor damage caused by improper detection range selection of the pressure sensor.

[0004] The purpose of this utility model is to achieve the following technical solution: a force detection device with a protective function, comprising:

[0005] The upper force-bearing plate has a force sensor installed on its lower surface. The force sensor is electrically connected to the control box through a signal line and is used to provide real-time feedback on the pressure applied by the pressure mechanism to be tested on the upper force-bearing plate.

[0006] The lower load-bearing plate is connected below the upper load-bearing plate through the upper guide rod;

[0007] The upper base plate is placed on the lower force plate, and an upper spring is arranged between the force sensor and the upper base plate;

[0008] A lower base plate is connected to the lower force-bearing plate through a lower guide rod, and a lower spring is provided between the lower base plate and the lower force-bearing plate; and

[0009] The limit rod is installed on the lower surface of the upper force-bearing plate and is used to limit the downward movement of the upper force-bearing plate.

[0010] As a further technical solution, the upper base plate is a plate-shaped structure, and when the upper force-bearing plate moves downward to a limit stroke, the limit rod abuts against the surface of the upper base plate.

[0011] As a further technical solution, an upper proximity sensor is set on the surface of the upper base plate to sense the position of the upper force-bearing plate. When the distance between the upper force-bearing plate and the upper base plate is less than a set value, the upper proximity sensor communicates with the control box and sends an alarm signal.

[0012] As a further technical solution, the upper base plate is a block structure and is embedded in the lower force-bearing plate. When the upper force-bearing plate moves downward to the limit stroke, the limit rod abuts against the surface of the lower force-bearing plate.

[0013] As a further technical solution, an upper proximity sensor is set on the surface of the lower force-bearing plate to sense the position of the upper force-bearing plate. When the distance between the upper force-bearing plate and the lower force-bearing plate is less than a set value, the upper proximity sensor communicates with the control box and sends an alarm signal.

[0014] As a further technical solution, a lower proximity sensor is set on the surface of the lower base plate to sense the position of the lower force plate. When the distance between the lower base plate and the lower force plate is less than a set value, the lower proximity sensor communicates with the control box and sends an alarm signal.

[0015] The beneficial effects of the utility model are:

[0016] 1. The upper protection device can be quickly replaced and selected according to the range of the pressure sensor of the pressure mechanism to be tested;

[0017] 2. No hard impact will be generated during the test of the pressure mechanism to be tested. The test stroke is extended due to the spring contraction stroke, which gives the operator a longer reaction time and makes it easier to find the required pressure value point;

[0018] 3. The upper base plate can be in plate or block shape, so as to adjust the limit stroke of the upper load-bearing plate's downward movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the present utility model.

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of Example 1 of the present utility model.

[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of Example 2 of the present utility model.

[0022] Explanation of the accompanying drawings: upper force plate 1, force sensor 2, limit rod 3, upper guide rod 4, upper proximity sensor 5, upper base plate 6, upper spring 7, lower guide rod 8, lower proximity sensor 9, lower base plate 10, signal line 11, control box 12, lower force plate 13, lower spring 14. DETAILED DESCRIPTION

[0023] The following is a detailed introduction to the present invention with reference to the accompanying drawings:

[0024] Example 1: As shown in the attached Figure 1 、 2 As shown, a force detection device with a protective function includes an upper force plate 1, a force sensor 2, a limit rod 3, an upper guide rod 4, an upper proximity sensor 5, an upper base plate 6, an upper spring 7, a lower guide rod 8, a lower proximity sensor 9, a lower base plate 10, a signal line 11, a control box 12, a lower force plate 13 and a lower spring 14.

[0025] A force sensor 2 is installed on the lower surface of the upper force plate 1. The force sensor 2 is electrically connected to the control box 12 through a signal line 11 for communication. It can provide real-time feedback on the pressure applied to the upper force plate 1 by the pressure mechanism to be tested, and display the value using the display screen of the control box 12.

[0026] The lower force-bearing plate 13 is connected to the lower side of the upper force-bearing plate 1 via the upper guide rod 4 (and guide sleeve). The upper base plate 6 adopts a plate-like structure and is placed on the lower force-bearing plate 13. At the same time, an upper spring 7 is provided between the force sensor 2 and the upper base plate 6. The lower base plate 10 is connected to the lower side of the lower force-bearing plate 13 via the lower guide rod 8 (and guide sleeve), and a lower spring 14 is provided between the lower base plate 10 and the lower force-bearing plate 13. Furthermore, two limit rods 3 are installed on the lower surface of the upper force-bearing plate 1. When the upper force-bearing plate 1 moves downward to the limit of travel, the limit rods 3 abut against the surface of the upper base plate 6, forming a hardware limit, thereby effectively protecting the force sensor 2.

[0027] Preferably, an upper proximity sensor 5 is installed on the surface of the upper base plate 6 facing the upper force-bearing plate 1. The upper proximity sensor 5 can sense the position of the upper force-bearing plate 1 in real time. When the distance between the upper force-bearing plate 1 and the upper base plate 6 is less than the set value, the upper proximity sensor 5 communicates with the control box 12 and sends an alarm signal to remind the operator.

[0028] In addition, a lower proximity sensor 9 is installed on the surface of the lower base plate 10 facing the lower force plate 13. The lower proximity sensor 9 can sense the position of the lower force plate 13 in real time. When the distance between the lower base plate 10 and the lower force plate 13 is less than the set value, the lower proximity sensor 9 communicates with the control box 12 and sends an alarm signal to remind the operator.

[0029] Example 2: Refer to the attached Figure 3 , which is different from Example 1 in that the upper base plate 6 adopts a block structure (its area is smaller than the plate structure in Example 1), and the upper base plate 6 is embedded in the lower force plate 13. When the upper force plate 1 moves downward to the limit stroke, the limit rod 3 abuts against the surface of the lower force plate 13, forming a hardware limit, thereby effectively protecting the force sensor 2. Compared with Example 1, the contact stroke between the limit rod 3 and the lower force plate 13 is longer. In addition, the upper proximity sensor 5 is set on the surface of the lower force plate 13, which can sense the position of the upper force plate 1 in real time. When the distance between the upper force plate 1 and the lower force plate 13 is less than the set value, the upper proximity sensor 5 communicates with the control box 12 and sends an alarm signal to remind the operator.

[0030] The working process of this utility model:

[0031] 1. During the test, place the device of the present invention under the pressure mechanism to be tested, connect the power supply of the control box 12, start the machine, and reset it after the startup is completed;

[0032] 2. Control the pressure mechanism to be tested to press downward until it contacts the upper force-bearing plate 1, and then press down slowly within the pressure range. The signal from the force sensor 2 is fed back to the control box 12, and the real-time pressure is displayed on the touch screen;

[0033] 3. During the downward pressure process, the upper force-bearing plate 1 moves downward, and the difference between the output force of the pressure mechanism and the force displayed on the touch screen of the control box 12 is compared for verification. During the detection process, the upper proximity sensor 5 detects the proximity signal of the upper force-bearing plate 1. When the distance is less than the set value, the feedback is sent to the control box 12 for a sound alarm prompt;

[0034] 4. If pressure is continued after the alarm is triggered, the limit rod 3 will contact the upper base plate 6 / lower force plate 13, forming a hardware limit and effectively protecting the force sensor 2;

[0035] 5. During the whole process, the lower spring mechanism (lower force plate 13 and lower spring 14) is compressed to prevent hard impact. The lower proximity sensor 9 monitors the proximity signal of the lower force plate 13 in real time. When the distance is less than the set value, it is fed back to the control box 12 for sound alarm prompt;

[0036] 6. After the force test process is completed, the upper spring 7 and the lower spring 14 return to their original positions to release the pressure, completing the test process.

[0037] It is understandable that for those skilled in the art, any equivalent replacement or change of the technical solution and the concept of the utility model should fall within the scope of protection of the claims attached to the utility model.

Claims

1. A force detection device with a protective function, characterized in that: include: An upper force-bearing plate (1) has a force sensor (2) mounted on its lower surface. The force sensor (2) is electrically connected to and communicates with a control box (12) via a signal line (11) for providing real-time feedback of the pressure applied by the pressure mechanism to be tested to the upper force-bearing plate (1); The lower load-bearing plate (13) is connected below the upper load-bearing plate (1) via the upper guide rod (4); An upper base plate (6) is placed on the lower force-bearing plate (13), and an upper spring (7) is provided between the force sensor (2) and the upper base plate (6); The lower base plate (10) is guided and connected to the lower side of the lower force-bearing plate (13) through the lower guide rod (8), and a lower spring (14) is provided between the lower base plate (10) and the lower force-bearing plate (13); and A limiting rod (3) is installed on the lower surface of the upper force-bearing plate (1) and is used to limit the downward movement of the upper force-bearing plate (1).

2. The force detection device with a protective function according to claim 1, characterized in that: The upper base plate (6) is a plate-shaped structure. When the upper force-bearing plate (1) moves downward to a limit stroke, the limiting rod (3) abuts against the surface of the upper base plate (6).

3. The force detection device with a protective function according to claim 2, characterized in that: An upper proximity sensor (5) is provided on the surface of the upper base plate (6) for sensing the position of the upper force-bearing plate (1). When the distance between the upper force-bearing plate (1) and the upper base plate (6) is less than a set value, the upper proximity sensor (5) communicates with the control box (12) and sends an alarm signal.

4. The force detection device with a protective function according to claim 1, characterized in that: The upper base plate (6) is a block structure and is embedded in the lower load-bearing plate (13). When the upper load-bearing plate (1) moves downward to a limit stroke, the limiting rod (3) abuts against the surface of the lower load-bearing plate (13).

5. The force detection device with a protective function according to claim 4, characterized in that: An upper proximity sensor (5) is provided on the surface of the lower stress-bearing plate (13) for sensing the position of the upper stress-bearing plate (1). When the distance between the upper stress-bearing plate (1) and the lower stress-bearing plate (13) is less than a set value, the upper proximity sensor (5) communicates with the control box (12) and sends an alarm signal.

6. The force detection device with a protective function according to claim 1, characterized in that: A lower proximity sensor (9) is provided on the surface of the lower base plate (10) for sensing the position of the lower force-bearing plate (13). When the distance between the lower base plate (10) and the lower force-bearing plate (13) is less than a set value, the lower proximity sensor (9) communicates with the control box (12) and sends an alarm signal.

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