Mechanical metering instrument calibration device

Abstract

The utility model provides a mechanical metering instrument calibration device comprising a housing, the housing is slidably connected with a bottom plate, the bottom plate is connected with a tension spring, and the bottom plate is connected with a hook; an outer cylinder is connected in the shell in a sliding mode, a weight capable of sliding into the outer cylinder is arranged above the bottom plate, and when the outer cylinder ascends, the weight can be lifted, so that the weight is separated from the bottom plate. The device is convenient to operate, when the mechanical measuring instrument is used, pre-measurement can be carried out in advance, and calibration is carried out according to a pre-measurement result, so that the use precision of the subsequent mechanical measuring instrument is improved.

Description

Technical Field

[0001] This utility model relates to the field of metrology and testing technology, specifically to a calibration device for mechanical metrology instruments. Background Technology

[0002] A tension spring balance is a device for measuring the magnitude of force by utilizing the proportional relationship between the deformation of a spring and the external force. The object to be measured is hung on the hook of the tension spring balance, and the spring is then stretched by the weight of the object. Since the elongation of the spring is proportional to the external force within the elastic limit, the weight of the object can be read directly from the indicator on the outer casing of the spring balance. After long-term use, calibration is required to ensure the accuracy of subsequent measurements.

[0003] Patent CN 218271200 U discloses a calibration device for measuring mechanical instruments, comprising a device body and a movable sleeve. The movable sleeve is fitted onto the top of the device body, a hanging ring is installed at the top of the movable sleeve, a fixing hook is installed at the bottom of the movable sleeve, a fixing frame is fixedly connected to the bottom of the fixing hook, a tension spring is fixedly connected to the top of the inside of the fixing frame, a fixing block is welded to the bottom of the tension spring, a screw is fixedly connected to the bottom of the fixing block, and a pointer piece is fitted onto the outside of the screw.

[0004] However, it still has the following problems: 1. It is not calibrated with standard weights and is directly reset, which may lead to calibration errors; 2. When not in use, the claw position is easily scratched, which may cause internal components to shift or be damaged, affecting the accuracy of measurement. Utility Model Content

[0005] To address the problems existing in the prior art, a calibration device for mechanical measuring instruments is provided. This device is easy to operate; when using mechanical measuring instruments, it can predict quantities in advance and perform calibration based on the predicted results, thereby improving the accuracy of subsequent use of the mechanical measuring instruments.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] This utility model proposes a calibration device for a mechanical measuring instrument, including a housing, a base plate slidably connected to the housing, a tension spring connected to the base plate, and a hook connected to the base plate; an outer cylinder slidably connected inside the housing, and a weight that can slide into the outer cylinder is arranged above the base plate, so that when the outer cylinder rises, the weight can be lifted and detached from the base plate.

[0008] Preferably, the outer cylinder is slidably connected to a top rod, the top rod is connected to the outer cylinder by a spring, and the weight has a slot into which the top rod can slide.

[0009] Preferably, one end of the push rod extends out of the outer cylinder, the spring is sleeved on the end of the push rod that extends out of the outer cylinder, one end of the spring is connected to the outer cylinder, and the other end of the spring is connected to the push rod.

[0010] Preferably, the spring force allows the push rod to slide out of the slot.

[0011] Preferably, the housing is fixedly connected to an inclined block, which includes an inclined surface and a flat surface. When the weight is located on the base plate, the flat surface is located on one side of the slot.

[0012] Preferably, when the push rod slides from the inclined plane to the flat plane, it can slide into the slot, at which point the spring is compressed.

[0013] Preferably, a pressure rod is fixedly connected to the upper end of the outer cylinder, and the pressure rod is connected to the housing through a compression spring, wherein the elastic force of the compression spring is greater than that of the spring.

[0014] Preferably, the housing is rotatably connected to a rotating rod, and the rotating rod is fixedly fitted with a cam, which is positioned above the pressure rod.

[0015] Preferably, the housing is slidably connected to a pull plate, the pull plate is connected to the base plate via a tension spring, and the housing is threadedly connected to a knob, the knob and the pull plate being rotatably connected.

[0016] Preferably, the housing includes a dial, a pointer that cooperates with the dial is rotatably connected to the housing, a gear is fixedly connected to the pointer, and a rack is fixedly connected to the base plate, with the rack and the gear meshing with each other.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This utility model is equipped with weights. When the rotating rod is rotated, the rotating rod drives the outer cylinder to slide downward through the cam. When the top rod moves to the inclined surface of the inclined block, the elastic force of the spring causes the top rod to move out of the slot. Under the action of gravity, the weight can fall onto the base plate to realize the predicted quantity. This allows the accuracy of the mechanical measuring instrument to be judged in advance, which is convenient for subsequent calibration of the mechanical measuring instrument.

[0019] 2. This utility model is equipped with an inclined block. When the cam stops pressing down on the outer cylinder, the compression spring drives the outer cylinder to rise. When the outer cylinder rises, it drives the push rod from the inclined surface of the inclined block to the plane. The plane causes the push rod to move into the slot, realizing the connection between the outer cylinder and the weight. When the outer cylinder continues to rise, it can drive the weight to rise, realizing the automatic rising of the weight after weighing, thus facilitating the subsequent calibration work.

[0020] 3. This utility model is equipped with a knob. When the knob is turned, it can drive the pull plate to rise or fall. The pull plate drives the base plate to move synchronously through the compression spring. At this time, the rack can drive the gear to rotate, thereby driving the pointer to rotate. The predicted quantity is achieved by using weights. According to the reading corresponding to the pointer at this time, the knob is rotated to adjust the pointer to a suitable angle, thereby realizing the calibration of the mechanical measuring instrument. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a three-dimensional view of the entire utility model;

[0023] Figure 2 This is the overall front view of this utility model;

[0024] Figure 3 This is an overall sectional view of the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Housing; 2. Handle; 3. Knob; 4. Dial; 5. Hook; 6. Protective shell; 7. Rotating rod; 8. Cam; 9. Pressure rod; 10. Compression spring; 11. Outer cylinder; 12. Inclined block; 13. Top rod; 14. Spring; 15. Slot; 16. Weight; 17. Tension spring; 18. Rack; 19. Gear; 20. Base plate; 21. Pull plate; 22. Pointer. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these 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 are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] like Figures 1-3 As shown, this embodiment proposes a mechanical measuring instrument calibration device, including a housing 1, a base plate 20 slidably connected to the housing 1, a tension spring 17 connected to the base plate 20, and a hook 5 connected to the base plate 20. The base plate 20 is located inside the housing 1 and is arranged in a horizontal direction. The lower end of the hook 5 extends out of the housing 1 and is used for suspending heavy objects.

[0029] An outer cylinder 11 is slidably connected inside the housing 1. The outer cylinder 11 can only slide in the vertical direction. There are two outer cylinders 11, and the two outer cylinders 11 are symmetrically arranged on both sides of the base plate 20. A weight 16 is provided above the base plate 20, which can slide into the outer cylinder 11. When the outer cylinder 11 rises, the weight 16 can be lifted, so that the weight 16 is removed from the base plate 20.

[0030] Two weights 16 are symmetrically arranged on both sides of the base plate 20. The symmetrical arrangement of the weights 16 facilitates the vertical sliding of the base plate 20. Under the action of gravity, the weights 16 can fall onto the base plate 20. At this time, the base plate 20 descends, causing the pointer 22 to rotate accordingly, thus realizing the predicted quantity. This allows the accuracy of the mechanical measuring instrument to be judged in advance, which is convenient for subsequent calibration of the mechanical measuring instrument. The weights 16 are standard parts, and the accuracy of the device is judged by measuring the weight of the weights 16.

[0031] The outer cylinder 11 is slidably connected to a push rod 13. The push rod 13 can only slide in the horizontal direction. The push rod 13 is connected to the outer cylinder 11 through a spring 14. The weight 16 has a slot 15 into which the push rod 13 can slide. When the push rod 13 slides into the slot 15, the outer cylinder 11 rises, and the weight 16 rises at the same time through the push rod 13.

[0032] One end of the push rod 13 extends out of the outer cylinder 11. The spring 14 is sleeved on the end of the push rod 13 that extends out of the outer cylinder 11. One end of the spring 14 is connected to the outer cylinder 11, and the other end of the spring 14 is connected to the push rod 13. The housing 1 is fixedly connected with an inclined block 12, which includes an inclined surface and a flat surface. When the weight 16 is located on the base plate 20, the flat surface is located on one side of the slot 15.

[0033] When the push rod 13 is on one side of the inclined plane, the inclined plane provides enough space for the push rod 13 to reset. At this time, the elastic force of the spring 14 can make the push rod 13 slide out of the slot 15, thereby contacting the outer cylinder 11 to limit the weight 16. Under the action of gravity, the weight 16 can fall on the base plate 20.

[0034] When the outer cylinder 11 rises, it drives the push rod 13 to rise. The push rod 13 slides along the inclined block 12. When the push rod 13 slides from the inclined plane to the flat plane, it moves towards the slot 15. When the push rod 13 moves to the flat plane, it can slide into the slot 15. At this time, the spring 14 is compressed, realizing the connection between the outer cylinder 11 and the weight 16. When the outer cylinder 11 rises later, it can drive the weight 16 to rise at the same time.

[0035] A pressure rod 9 is fixedly connected to the upper end of the outer cylinder 11. The pressure rod 9 can only slide in the vertical direction. The pressure rod 9 is connected to the housing 1 through a pressure spring 10. The pressure spring 10 is sleeved on the pressure rod 9. The upper end of the pressure spring 10 is connected to the pressure rod 9, and the lower end of the pressure spring 10 is connected to the housing 1. The elastic force of the pressure spring 10 is greater than that of the spring 14, and the elastic force of the pressure spring 10 is large enough. Therefore, the pressure spring 10 can drive the outer cylinder 11 and the weight 16 and other structures to rise simultaneously.

[0036] The housing 1 is rotatably connected to a rotating rod 7, and a cam 8 is fixedly sleeved on the rotating rod 7. The cam 8 is positioned above the pressure rod 9. One end of the rotating rod 7 extends out of the housing 1. When the rotating rod 7 rotates, it can drive the cam 8 to rotate. The cam 8 can press down the pressure rod 9. The weight of the cam 8 itself will not cause the outer cylinder 11 to descend. Therefore, the outer cylinder 11 will descend only by manually rotating the rotating rod 7.

[0037] The housing 1 is slidably connected to a pull plate 21, which can only slide vertically. The pull plate 21 is connected to the base plate 20 via a tension spring 17. The upper end of the tension spring 17 is connected to the pull plate 21, and the lower end of the tension spring 17 is connected to the base plate 20. The housing 1 is threadedly connected to a knob 3, which is rotatably connected to the pull plate 21. When the knob 3 is rotated, it can drive the pull plate 21 to move vertically.

[0038] The housing 1 includes a dial 4, and a pointer 22 that cooperates with the dial 4 is rotatably connected to the housing 1. By observing the scale of the dial 4 and the angle of rotation of the pointer 22 on the dial 4, the weight of the object can be measured. The pointer 22 is fixedly connected to a gear 19, and the base plate 20 is fixedly connected to a rack 18. The rack 18 and the gear 19 mesh with each other.

[0039] A handle 2 is fixedly connected to the upper end of the housing 1, and a protective shell 6 is detachably connected to the lower end of the housing 1. The hook 5 is located inside the protective shell 6. The housing 1 has a sliding groove, and the protective shell 6 can be slidably connected to the sliding groove. The friction between the protective shell 6 and the sliding groove is much greater than the weight of the protective shell 6, thereby achieving relative fixation of the protective shell 6 and thus protecting the hook 5.

[0040] The specific working process is as follows: Before using the device, by rotating the rotating rod 7, the rotating rod 7 drives the cam 8 to rotate, the cam 8 presses down the pressure rod 9, and the pressure rod 9 drives the outer cylinder 11 to descend. At this time, the push rod 13 slides along the plane of the inclined block 12. When the push rod 13 slides to the inclined surface of the inclined block 12, under the elastic force of the spring 14, the push rod 13 moves out of the slot 15, and the weight 16 falls on the base plate 20. The base plate 20 drives the rack 18 to descend, and the rack 18 drives the pointer 22 to rotate through the gear 19 to take the reading at this time.

[0041] Since the weight 16 is a standard part, by observing the scale corresponding to the pointer 22 at this time, when a deviation occurs, calibration is required. During calibration, the knob 3 is turned, which drives the pull plate 21 to move vertically. The pull plate 21 drives the base plate 20 to move through the tension spring 17. The base plate 20 drives the gear 19 to rotate through the rack 18. The gear 19 drives the pointer 22 to rotate, so that the pointer 22 rotates to the specified position, thus realizing the calibration of the mechanical measuring instrument.

[0042] After calibration, release the rotating rod 7. The compression spring 10 drives the pressure rod 9 to rise, and the pressure rod 9 drives the outer cylinder 11 to rise. At this time, the top rod 13 slides from the inclined surface of the inclined block 12 to the flat surface, so that the top rod 13 moves towards the slot 15. When the top rod 13 slides to the flat surface, it moves into the slot 15, thus completing the connection between the outer cylinder 11 and the weight 16. At this time, when the outer cylinder 11 rises, it can drive the weight 16 to rise at the same time, which facilitates the subsequent calibration work.

[0043] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A calibration device for a mechanical measuring instrument, comprising a housing (1), characterized in that, The housing (1) is slidably connected to a base plate (20), the base plate (20) is connected to a tension spring (17), and the base plate (20) is connected to a hook (5); the housing (1) is slidably connected to an outer cylinder (11), and a weight (16) that can slide into the outer cylinder (11) is provided above the base plate (20). When the outer cylinder (11) rises, the weight (16) can be lifted so that the weight (16) is removed from the base plate (20).

2. The calibration device for a mechanical measuring instrument according to claim 1, characterized in that, The outer cylinder (11) is slidably connected to a top rod (13), the top rod (13) is connected to the outer cylinder (11) by a spring (14), and the weight (16) has a slot (15) into which the top rod (13) can slide.

3. The calibration device for a mechanical measuring instrument according to claim 2, characterized in that, One end of the top rod (13) extends out of the outer cylinder (11), and the spring (14) is sleeved on the end of the top rod (13) that extends out of the outer cylinder (11). One end of the spring (14) is connected to the outer cylinder (11), and the other end of the spring (14) is connected to the top rod (13).

4. The calibration device for a mechanical measuring instrument according to claim 2, characterized in that, The elastic force of the spring (14) allows the push rod (13) to slide out of the slot (15).

5. A calibration device for a mechanical measuring instrument according to claim 2, characterized in that, The housing (1) is fixedly connected to a wedge (12), which includes a wedge and a plane. When the weight (16) is on the base plate (20), the plane is located on one side of the slot (15).

6. The calibration device for a mechanical measuring instrument according to claim 5, characterized in that, When the push rod (13) slides from the inclined plane to the plane, it can slide into the slot (15), at which time the spring (14) is compressed.

7. The calibration device for a mechanical measuring instrument according to claim 1, characterized in that, A pressure rod (9) is fixedly connected to the upper end of the outer cylinder (11). The pressure rod (9) is connected to the housing (1) through a compression spring (10). The elastic force of the compression spring (10) is greater than that of the spring (14).

8. A calibration device for a mechanical measuring instrument according to claim 7, characterized in that, The housing (1) is rotatably connected to a rotating rod (7), and the rotating rod (7) is fixedly fitted with a cam (8), which is located above the pressure rod (9).

9. A calibration device for a mechanical measuring instrument according to claim 1, characterized in that, The housing (1) is slidably connected to a pull plate (21), the pull plate (21) is connected to the base plate (20) via a tension spring (17), and the housing (1) is threadedly connected to a knob (3), the knob (3) and the pull plate (21) are rotatably connected.

10. A calibration device for a mechanical measuring instrument according to claim 1, characterized in that, The housing (1) includes a dial (4), and the housing (1) is rotatably connected to a pointer (22) that cooperates with the dial (4). The pointer (22) is fixedly connected to a gear (19), and the base plate (20) is fixedly connected to a rack (18). The rack (18) and the gear (19) mesh with each other.

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