Precise height measuring instrument

Abstract

The utility model belongs to the technical field of height measuring instruments, and discloses a precise height measuring instrument which comprises a fixed seat, stand columns are fixedly installed on the left side and the right side of the upper surface of the fixed seat, top plates are fixedly installed on the tops of the two stand columns, air cylinders are fixedly installed on the tops of the top plates, and movable plates are fixedly installed at the ends of output shafts of the air cylinders. According to the precise height measuring instrument, the air cylinder works to drive the moving plate to move downwards, the pressure sensing contact at the lower end of the moving plate is in contact with the top of a workpiece in the moving process of the moving plate, the pressure sensing contact is in contact with the top of the workpiece, and the pressure sensing contact is in contact with the top of the workpiece in the moving process of the moving plate. When the pressure sensing contact is in contact, an electric signal is detected so that the air cylinder can stop working, the pressure sensing contact is moved to the bottommost position of the vertical notch of the workpiece firstly, the air cylinder contracts so that the pressure sensing contact can be moved to the highest position of the vertical notch, and the moving distance of the pressure sensing contact is the height of the vertical notch of the workpiece.

Description

Technical Field

[0001] The utility model belongs to the technical field of height measuring instruments, and particularly relates to a precision height measuring instrument. Background Technique

[0002] A height measuring instrument, abbreviated as a height gauge or altimeter, is mainly used to measure the height of workpieces, and can also measure the dimensions of shape and position tolerances, such as perpendicularity and straightness. It can also be used to measure depth, groove width, internal and external diameters, highest point, lowest point, flatness, angle, etc. According to different reading forms, it can be divided into ordinary vernier type and electronic digital display type. According to the number of main columns, there are also single-column and double-column types.

[0003] For example, a precision pneumatic height measuring instrument with the publication number CN211291376U includes a support unit, a lifting unit and a detection mold. The lifting unit is arranged on the support unit, and the detection mold is driven by the lifting unit to lift. This precision pneumatic height measuring instrument controls the up and down movement speed of the detection mold and the pressure borne by the product by adjusting the air flow of the cylinder to prevent the product from being crushed. Through two parallel linear slide rail groups, the parallelism between the horizontal plate and the bottom plate during lifting is realized, so that the detection mold completely fits the product, and then the accurate height number of the product is detected by cooperating with a grating ruler;

[0004] This height measuring instrument measures the height of the workpiece by the way of pressing and detecting. However, this measuring method can only detect the overall height of the workpiece. If there is a side groove on the workpiece, the height of the groove cannot be detected, and its detection range is small. To solve the above problems, a precision height measuring instrument is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a precision height measuring instrument to solve the above problems, including:

[0006] A fixed seat, on the left and right sides of the upper surface of which are fixedly installed columns. At the tops of the two columns are fixedly installed top plates. At the top of the top plate is fixedly installed a cylinder, and at the end of the output shaft of the cylinder is fixedly installed a moving plate;

[0007] A motor, which is fixedly installed at the center of the bottom of the moving plate. At the end of the output shaft of the motor is fixedly installed a rotating rod, and on the outer wall of the lower end of the rotating rod is fixedly installed a pressure sensing head.

[0008] Through the above technical solution, when the height of the workpiece needs to be measured, the cylinder works to drive the moving plate to move downward. During the movement of the moving plate, the pressure transmission touch head at its lower end contacts the top of the workpiece. When the pressure transmission touch head contacts, an electrical signal is detected, causing the cylinder to stop working. Subtracting the moving distance of the pressure transmission touch head from its initial height can calculate the height of the workpiece. When the height of the vertical notch on the outer wall of the workpiece needs to be detected, first move the pressure transmission touch head to the bottom of the vertical notch of the workpiece, and then contract the cylinder to move the pressure transmission touch head to the highest point of the vertical notch. The moving distance of the pressure transmission touch head is the height of the vertical notch of the workpiece. By setting the motor, it can drive the rotating rod to rotate, thereby changing the position of the pressure transmission touch head, so that the device can detect notches at different positions.

[0009] In a preferred embodiment, a slide rail is fixedly installed on the inner wall of the column, a slider is slidably connected to the outer wall of the slide rail, and a connecting piece is fixedly installed on one side of the slider by bolts. The two connecting pieces are respectively fixedly installed on the left and right sides of the moving plate.

[0010] Through the above technical solution, during the movement of the moving plate, the moving plate always moves along a straight line by the cooperation of the slider and the slide rail, improving the detection accuracy of the device.

[0011] In a preferred embodiment, a fixed block is fixedly installed on the front side of the upper surface of the fixed seat, and a placement groove is provided on the upper surface of the fixed block.

[0012] Through the above technical solution, the workpiece is fixed on the top of the fixed block through the placement groove.

[0013] In a preferred embodiment, guide rods are fixedly installed on both the left and right sides of the upper surface of the moving plate, and the guide rods are slidably connected to the inside of the top plate.

[0014] In a preferred embodiment, a display screen is fixedly installed on one side of the column, and the display screen is electrically connected to the pressure transmission touch head.

[0015] Through the above technical solution, the detected data is displayed through the display screen.

[0016] In a preferred embodiment, an anti-slip pad is fixedly installed at the bottom of the fixed seat.

[0017] In a preferred embodiment, both the cylinder and the motor are controlled by a PLC.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effect of the present utility model is that the present utility model provides a precision height measuring instrument.

[0019] When height measurement of a workpiece is required, the cylinder operates to drive the moving plate downward. During the movement of the moving plate, the pressure sensing contact at its lower end contacts the top of the workpiece. When the pressure sensing contact makes contact, an electrical signal is detected, causing the cylinder to stop working. Subtracting the moving distance of the pressure sensing contact from its initial height can calculate the height of the workpiece. When detecting the height of the vertical notch on the outer wall of the workpiece, first move the pressure sensing contact to the bottom of the vertical notch of the workpiece, and then contract the cylinder to move the pressure sensing contact to the highest point of the vertical notch. The moving distance of the pressure sensing contact is the height of the vertical notch of the workpiece. By setting a motor, it can drive the rotating rod to rotate, thereby changing the position of the pressure sensing contact, enabling the device to detect notches at different positions. Description of the Drawings

[0020] Figure 1 is a schematic structural view of the present utility model;

[0021] Figure 2 is a front view of the present utility model;

[0022] Figure 3 is a side view of the present utility model.

[0023] Reference numerals in the drawings: 1 - fixed seat; 2 - column; 3 - top plate; 4 - cylinder; 5 - moving plate; 6 - motor; 7 - rotating rod; 8 - pressure sensor contact; 9 - fixed block; 10 - placement groove; 11 - guide rod; 12 - slide rail; 13 - slider; 14 - connecting piece; 15 - display screen; 16 - anti-slip pad. Detailed Description of the Embodiment

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] The following will be combined with Figures 1-3 to give a detailed description of a precision height measuring instrument according to an embodiment of the present utility model.

[0026] Embodiment:

[0027] A precision height measuring instrument includes:

[0028] The fixed seat 1 has columns 2 fixedly installed on both the left and right sides of its upper surface. A fixed block 9 is fixedly installed on the front side of the upper surface of the fixed seat 1. A placement groove 10 is formed on the upper surface of the fixed block 9. The workpiece is fixed to the top of the fixed block 9 through the placement groove 10. An anti-slip pad 16 is fixedly installed at the bottom of the fixed seat 1;

[0029] At the top of both columns 2, there are top plates 3 fixedly installed. At the top of the top plate 3, there is a cylinder 4 fixedly installed. The end of the output shaft of the cylinder 4 is fixedly installed with a moving plate 5. A slide rail 12 is fixedly installed on the inner wall of the column 2. A slider 13 is slidably connected to the outer wall of the slide rail 12. One side of the slider 13 is fixedly installed with a connecting piece 14 through bolts. The two connecting pieces 14 are respectively fixedly installed on the left and right sides of the moving plate 5. Guide rods 11 are fixedly installed on both the left and right sides of the upper surface of the moving plate 5. The guide rods 11 are slidably connected to the inside of the top plate 3. During the movement of the moving plate 5, the moving plate 5 always moves along a straight line through the cooperation of the slider 13 and the slide rail 12, improving the detection accuracy of the equipment;

[0030] A motor 6 is fixedly installed at the center of the bottom of the moving plate 5. Both the cylinder 4 and the motor 6 are controlled by a PLC. The end of the output shaft of the motor 6 is fixedly installed with a rotating rod 7. A pressure transmission and sensing head 8 is fixedly installed on the outer wall of the lower end of the rotating rod 7. By the operation of the cylinder 4, the moving plate 5 is driven to move downward. During the movement of the moving plate 5, the pressure transmission and sensing head 8 at its lower end contacts the top of the workpiece. When the pressure transmission and sensing head 8 contacts, an electrical signal is detected, causing the cylinder 4 to stop working. Subtracting the moving distance of the pressure transmission and sensing head 8 from its initial height can calculate the height of the workpiece. When it is necessary to detect the height of the vertical notch on the outer wall of the workpiece, first move the pressure transmission and sensing head 8 to the bottom of the vertical notch of the workpiece, and then contract the cylinder 4 to move the pressure transmission and sensing head 8 to the top of the vertical notch. The moving distance of the pressure transmission and sensing head 8 is the height of the vertical notch of the workpiece. By setting the motor 6, it can drive the rotating rod 7 to rotate, thereby changing the position of the pressure transmission and sensing head 8, enabling the equipment to detect notches at different positions;

[0031] A display screen 15 is fixedly installed on one side of the column 2. The display screen 15 is electrically connected to the pressure transmission and sensing head 8. The detected data is displayed through the display screen 15.

[0032] Working principle:

[0033] When height measurement of the workpiece is required, the cylinder 4 works to drive the moving plate 5 to move downward. During the movement of the moving plate 5, the pressure transmission touch head 8 at its lower end contacts the top of the workpiece. When the pressure transmission touch head 8 makes contact, an electrical signal is detected, causing the cylinder 4 to stop working. Subtracting the moving distance of the pressure transmission touch head 8 from its initial height can calculate the height of the workpiece. When detecting the height of the vertical notch on the outer wall of the workpiece, first move the pressure transmission touch head 8 to the bottom of the vertical notch of the workpiece, and then contract the cylinder 4 to move the pressure transmission touch head 8 to the highest point of the vertical notch. The moving distance of the pressure transmission touch head 8 is the height of the vertical notch of the workpiece. By setting the motor 6, it can drive the rotating rod 7 to rotate, thereby changing the position of the pressure transmission touch head 8, enabling the device to detect notches at different positions.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A precision height measuring instrument, characterized in that: include: A fixed seat (1), with columns (2) fixedly mounted on both left and right sides of its upper surface, top plates (3) fixedly mounted on the tops of the two columns (2), a cylinder (4) fixedly mounted on the tops of the top plates (3), and a movable plate (5) fixedly mounted on the output shaft end of the cylinder (4); The motor (6) is fixedly mounted at the bottom center of the moving plate (5); a rotating rod (7) is fixedly mounted on the end of the output shaft of the motor (6); and a pressure sensing contact (8) is fixedly mounted on the outer wall of the lower end of the rotating rod (7).

2. A precision height measuring instrument as claimed in claim 1, characterized in that: A slide rail (12) is fixedly mounted on the inner wall of the column (2), a slider (13) is slidably connected to the outer wall of the slide rail (12), a connecting piece (14) is fixedly mounted on one side of the slider (13) by means of bolts, and the two connecting pieces (14) are respectively fixedly mounted on the left and right sides of the movable plate (5).

3. A precision height measuring instrument as claimed in claim 1, characterized in that: A fixing block (9) is fixedly mounted on the front side of the upper surface of the fixing seat (1), and a placement groove (10) is provided on the upper surface of the fixing block (9).

4. A precision height measuring instrument as claimed in claim 1, characterized in that: Guide rods (11) are fixedly mounted on both left and right sides of the upper surface of the movable plate (5), and the guide rods (11) are slidably connected to the inside of the top plate (3).

5. A precision height measuring instrument as claimed in claim 1, characterized in that: A display screen (15) is fixedly mounted on one side of the column (2), and the display screen (15) is electrically connected to a pressure sensing contact (8).

6. A precision height measuring instrument as claimed in claim 1, characterized in that: A sliding pad (16) is fixedly mounted on the bottom of the fixing seat (1).

7. A precision height measuring instrument as claimed in claim 1, characterized in that: The cylinder (4) and the motor (6) are both controlled by PLC.

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