Pneumatic measuring instrument

Abstract

The utility model discloses a pneumatic measuring instrument, which comprises a case and a base fixedly arranged below the case, the base is provided with a leveling structure, the case is provided with an electronic display column, the side edge of the electronic display column is provided with a graduated scale matched with the electronic display column, and a display screen is arranged below the electronic display column. A control button is arranged below the display screen; an air inlet channel communicated with the air pipe is formed in the pneumatic measuring head, a first air channel and a second air channel communicated with the air inlet channel are formed in the end, away from the air pipe, of the pneumatic measuring head, and the first air channel and the second air channel penetrate through the pneumatic measuring head to form a first nozzle and a second nozzle respectively; the pneumatic measuring head is provided with two exhaust grooves penetrating through the outer wall of the pneumatic measuring head. According to the utility model, the leveling structure is arranged to realize stable work of the case, the device is suitable for application of different platforms, and the special air channel of the pneumatic measuring head enables the detection effect to be more stable and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring equipment, in particular to a pneumatic measuring instrument. Background Art

[0002] With the improvement of industrial automation and intelligence, the pneumatic tool industry will develop in the direction of miniaturization, integration, intelligence, precision and lightness. As a new type of detection tool, the internal hole measurement pneumatic instrument has also been continuously developed and improved. It has the advantages of simple structure, easy operation and high measurement accuracy, and is widely used in industrial production.

[0003] As a precision measuring instrument, the pneumatic measuring instrument has the following working principle: there is an air outlet on the pneumatic probe, which is connected to compressed air through the air inlet duct. During measurement, the pneumatic probe is located inside the workpiece to be measured, and the air outlet is close to the measuring point of the workpiece to be measured. There is a gap between the probe and the workpiece to be measured, and compressed air escapes from the gap. The change in the gap of different sizes will cause the change in the pressure of the filled air. The gas-to-electric converter converts this pressure change into a related electrical signal to the data processing element, and then uses the single-chip computer technology to process the data, which can be directly displayed on the display screen and the light column engraved with a ruler. The measuring head of the current pneumatic measuring instrument is usually equipped with two air outlet channels with an angle of 180° to each other, which can measure two points on the same cross section of the inner diameter of the pipe. After the rotation measurement, the average inner diameter of the pipe is calculated. When inserting the measuring head into the workpiece, it is necessary to rotate the measuring head accurately, otherwise the measuring head is prone to collide with the workpiece, resulting in damage to the measuring head and / or the surface of the workpiece being measured, greatly affecting the service life of the measuring head. In addition, the current measuring instruments are all columnar structures with too high a center of gravity. It is easy for the operator to knock over the chassis during operation, which can easily cause damage to the components inside the chassis. Therefore, the stability of the pneumatic measuring instrument and the structure of the measuring head need to be improved. Utility Model Content

[0004] The purpose of the utility model is to overcome the above-mentioned defects in the prior art and provide a pneumatic measuring instrument, which realizes stable operation of the chassis through a leveling structure and is adaptable to applications on different platforms. The special airway setting of the pneumatic probe can assist rotation while stabilizing detection, making the detection effect more stable and reliable.

[0005] To achieve the above object, the utility model provides a pneumatic measuring instrument, comprising:

[0006] A chassis, a base fixedly arranged below the chassis, the base being provided with a leveling structure, an electronic display column being provided on the chassis, a scale ruler cooperating with the electronic display column being provided on the side of the electronic display column, a display screen being provided below the electronic display column, a control button being provided below the display screen, and a probe connector and a magnification adjustment button being provided below the control button in sequence;

[0007] A pneumatic probe, wherein the pneumatic probe is connected to the probe connector through an air pipe, an air inlet connected to the air pipe is provided on the pneumatic probe, and a first air channel and a second air channel connected to the air inlet are provided on the end of the pneumatic probe away from the air pipe, the first air channel and the second air channel are parallel to each other, and the first air channel and the second air channel are respectively located on both sides of the axis extension line of the air inlet to form a staggered setting, the first air channel and the second air channel respectively penetrate the pneumatic probe to form a first nozzle and a second nozzle, and the pneumatic probe is provided with two exhaust grooves penetrating the outer wall of the pneumatic probe, and the first nozzle and the second nozzle are respectively connected to the corresponding exhaust grooves. The base of the utility model is provided with a leveling structure to achieve stable operation of the chassis and adapt to the application of different platforms. The special air channel setting of the pneumatic probe can assist the rotation while stabilizing the detection, so that the detection effect is better, stable and reliable.

[0008] Furthermore, it also includes a probe handle, which is a hollow structure, the air pipe passes through the probe handle and is connected to the air inlet, and the probe handle is connected to the pneumatic probe by threads. The probe handle can be used more conveniently and quickly, and the accuracy of operation is better improved.

[0009] Furthermore, a flat gripping portion is provided on the probe handle, and an anti-skid layer is provided on the gripping portion. The provision of the gripping portion can increase the precision of the handle manipulation, and in particular, the provision of the anti-skid layer can facilitate better operation.

[0010] Furthermore, the connection between the two exhaust grooves and the first nozzle and the second nozzle extends outward to form an annular groove that can wrap the first nozzle and the second nozzle, and the first nozzle and the second nozzle are placed in the annular groove and are slightly lower than the height of the annular groove. In this way, the air from the nozzle can smoothly pass through the annular groove into the exhaust groove, avoiding air reflux affecting the measurement accuracy. Moreover, the height setting can avoid the collision between the nozzle and the inner wall of the measured part during detection, causing damage to the part or the probe, affecting the detection accuracy.

[0011] Furthermore, the pneumatic probe is also provided with a third air channel and a fourth air channel, the third air channel and the fourth air channel are parallel to each other, and the third air channel and the fourth air channel are respectively located on both sides of the axis extension line of the air inlet to form a staggered setting, the third air channel and the fourth air channel respectively penetrate the pneumatic probe to form a third nozzle and a fourth nozzle, and the pneumatic probe is provided with four groups of exhaust grooves penetrating the outer wall of the pneumatic probe, and the first nozzle, the second nozzle, the third nozzle and the fourth nozzle are respectively placed in the corresponding exhaust grooves. By setting the third air channel and the fourth air channel, a four-air channel detection can be formed, and the inner diameter of a part can be measured by rotating 90 degrees, which is more practical.

[0012] Furthermore, a rounded corner structure is provided at one end of the pneumatic probe away from the air pipe. The rounded corner structure can prevent the pneumatic probe from scratching the inner wall of the part when the pneumatic probe is inserted into the part, thereby preventing inaccurate measurement.

[0013] Furthermore, the leveling structure is an adjustable height adjusting bolt arranged on the base. The height of different positions can be adjusted by adjusting the adjusting bolt so that the whole machine can adapt to different platforms or uneven platforms, which has good practicality.

[0014] Furthermore, the leveling structure also includes a reinforcing bracket extending upward from the base, the reinforcing bracket is trapezoidal in shape, and a handle connected to the shaft is provided on the reinforcing bracket. The reinforcing bracket can provide lateral support for the chassis, thereby preventing the chassis from being knocked over and causing damage to the components inside the chassis, and the handle can be more convenient for carrying.

[0015] Furthermore, the electronic display column is a three-color LED lamp column. Through the control of the mainboard inside the chassis, different colors can be displayed on the electronic display column according to the detection results of the pneumatic probe, so that the detection results can be seen more intuitively.

[0016] Furthermore, the probe connector is a pneumatic quick connector. The use of a pneumatic quick connector can achieve quick connection of the air pipe and improve the air tightness of the connection.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] 1. A leveling structure can be selected according to the platform or environment used. The height of the chassis can be adjusted and the stability of the chassis can be enhanced through the leveling structure, so that the utility model can adapt to different platforms or some uneven countertops, making the detection effect more stable and reliable, and at the same time can reduce the impact of the chassis falling and affecting the accuracy of the overall detection.

[0019] 2. The air passages in the pneumatic probe are arranged in parallel and staggered, so that a certain angle difference is formed at the outlet of the first nozzle and the second nozzle. When the operator rotates the probe, the first nozzle and the second nozzle rotate with the nozzle, and the ejected gas forms a certain driving force to assist the rotation, which can effectively reduce the resistance between the pneumatic probe and the measured part and increase the efficiency of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of a pneumatic measuring instrument provided in Example 1 of the utility model;

[0022] Figure 2 yes Figure 1 A magnified schematic diagram of the middle A area;

[0023] Figure 3 yes Figure 1 Schematic diagram of the cross section of the pneumatic probe;

[0024] Figure 4 is a cross-sectional schematic diagram of the pneumatic probe of Example 2;

[0025] Figure 5 is a schematic structural diagram of Example 3;

[0026] Figure 6 It is a structural schematic diagram of Example 4.

[0027] Included in the figure are:

[0028] 1. Chassis; 11. Base; 12. Fixing screw hole; 13. Electronic display column; 14. Scale ruler; 15. Display screen; 16. Control button; 17. Probe connector; 18. Magnification adjustment button; 2. Pneumatic probe; 21. Rounded corner structure; 22. Air inlet; 23. First air duct; 231. First nozzle; 24. Second air duct; 241. Second nozzle; 25. Exhaust groove; 26. Ring groove; 27. Probe handle; 271. Grip; 28. Third air duct; 281. Third nozzle; 29. ​​Fourth air duct; 291. Fourth nozzle; 3. Air pipe; 4. Adjustment bolt; 5. Strengthening bracket; 6. Handle. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in this embodiment of the utility model to clearly and completely describe the technical solution in this embodiment of the utility model. Obviously, the described embodiment is one embodiment of the utility model, not all embodiments of the utility model. Based on this embodiment of the utility model, all other embodiments of the utility model obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0032] Example 1

[0033] See also Figures 1 to 3 , an embodiment of the utility model provides a pneumatic measuring instrument, comprising:

[0034] Chassis 1, a base 11 fixedly arranged below the chassis 1, the base 11 is provided with a leveling structure, the leveling structure of the present embodiment is a fixing screw hole 12 arranged on the base 11, and the base 11 can be directly fixed to the working platform with screws when in use, an electronic display column 13 is arranged on the chassis 1, the electronic display column 13 is a three-color LED lamp column, the side of the electronic display column 13 is provided with a scale ruler 14 cooperating with the electronic display column 13, a display screen 15 is arranged below the electronic display column 13, a control button 16 is arranged below the display screen 15, a probe connector 17 and a magnification adjustment button 18 are arranged in sequence below the control button 16, and the probe connector 17 is a pneumatic quick connector;

[0035] A pneumatic probe 2, wherein the pneumatic probe 2 is connected to the probe connector 17 through an air pipe 3, and a rounded structure 21 is provided at one end of the pneumatic probe 2 away from the air pipe 3. By forming the rounded structure 21 at the end of the pneumatic probe 2, when the pneumatic probe 2 is inserted into the part to be measured, the corners of the pneumatic probe 2 will not scratch the inner wall of the part to be measured, thereby increasing the accuracy of measurement; an air inlet 22 connected to the air pipe 3 is provided on the pneumatic probe 2, and a first air channel 23 and a second air channel 24 connected to the air inlet 22 are provided on the end of the pneumatic probe 2 away from the air pipe 3, the first air channel 23 and the second air channel 24 are parallel to each other, and the first air channel 23 and the second air channel 24 are respectively located on both sides of the axial extension line of the air inlet 22 to form a staggered arrangement, which can ensure that the first air channel 23 and the second air channel 24 will not affect each other and can increase the accuracy of measurement; the first air channel 23 and the second air channel 24 respectively penetrate the The pneumatic probe 2 forms a first nozzle 231 and a second nozzle 241. The pneumatic probe 2 is provided with two exhaust grooves 25 penetrating the outer wall of the pneumatic probe 2, which is equivalent to providing an independent exhaust groove 25 for each air passage, so as to facilitate the exhaust of each air passage; the first nozzle 231 and the second nozzle 241 are respectively connected to the corresponding exhaust grooves 25. In order to more reasonably cooperate with the operation of the exhaust grooves 25, in this embodiment, the connection between the two exhaust grooves 25 and the first nozzle 231 and the second nozzle 241 extends outward to form an annular groove 26 that can wrap the first nozzle 231 and the second nozzle 241, that is, one side of each exhaust groove 25 is connected with an annular groove 26, and each nozzle is arranged in the annular groove 26. The first nozzle 231 and the second nozzle 241 are placed in the annular groove 26 and are slightly lower than the height of the annular groove 26. In this way, when the pneumatic probe 2 is inserted into the part to be measured, the nozzle will not collide with the inner wall of the part to be measured, and will not affect the overall measurement accuracy.

[0036] In this embodiment, a probe handle 27 is further provided between the pneumatic probe 2 and the air pipe 3. The probe handle 27 is a hollow structure. The air pipe 3 passes through the probe handle 27 and is connected to the air inlet 22. The probe handle 27 is threadedly connected to the pneumatic probe 2. In order to make the probe handle 27 easier to operate, in this embodiment, two flat gripping portions 271 are provided on the probe handle 27. The gripping portions 271 are symmetrically provided on the probe handle 27, and an anti-slip layer is provided on the gripping portions 271.

[0037] Example 2

[0038] See also Figure 4The difference between this embodiment and the embodiment 1 is that the pneumatic probe 2 is further provided with a third air passage 28 and a fourth air passage 29, which are parallel to each other and are respectively located on both sides of the axis extension line of the air inlet 22 to form a staggered arrangement. The third air passage 28 and the fourth air passage 29 respectively penetrate the pneumatic probe 2 to form a third nozzle 281 and a fourth nozzle 291. The pneumatic probe 2 is also provided with four groups of exhaust grooves 25 penetrating the outer wall of the pneumatic probe 2. The first nozzle 231, the second nozzle 241, the third nozzle 281 and the fourth nozzle 291 are respectively placed in the corresponding annular grooves 26. In this way, the four air passages at different positions can play the role of assisting rotation and can reduce the angle of rotation measurement. Only 90 degrees of rotation is required to complete the measurement of the inner diameter of the part, which effectively improves the measurement efficiency. The other structures are the same as those of the embodiment 1, and the effects of the embodiment 1 are also achieved.

[0039] Example 3

[0040] See also Figure 5 The difference between this embodiment and the first embodiment is that the leveling structure is an adjustable height adjusting bolt 4 arranged on the base 11. As shown in the figure, four sets of adjusting bolts 4 are arranged in this embodiment, which can be adjusted according to actual conditions. When encountering an uneven work table, the height of the chassis 1 can be adjusted by adjusting the height of the adjusting bolts 4, so that the chassis 1 of the utility model can be in a stable state when working, and will not shake, thereby improving the working stability of the pneumatic probe 2. The other structures are the same as those of the first embodiment, and the effects of the first embodiment are also achieved.

[0041] Example 4

[0042] See also Figure 6 The difference between this embodiment and embodiment 1 is that, based on embodiment 3, the leveling structure of this embodiment further includes a reinforcing bracket 5 formed by the base 11 extending upward, the reinforcing bracket 5 is trapezoidal in shape, and a handle 6 connected to the shaft is provided on the reinforcing bracket 5. Since the present utility model is a columnar chassis 1, its center of gravity is relatively high. In actual operation, the operator can easily knock over the chassis 1, and the precision components inside the chassis 1 will be affected to a certain extent, which can easily cause inaccurate measurements. Therefore, the reinforcing bracket 5 can improve the stability of the chassis 1 and prevent it from tipping over. In addition, the handle 6 provided in this embodiment can facilitate the movement of the chassis 1, which is practical. The other structures are the same as those in embodiment 1, and the effects of embodiment 1 are also achieved.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pneumatic measuring instrument, characterized in that: include: A chassis (1), a base (11) fixedly arranged below the chassis (1), the base (11) being provided with a leveling structure, an electronic display column (13) being provided on the chassis (1), a scale (14) cooperating with the electronic display column (13) being provided on the side of the electronic display column (13), a display screen (15) being provided below the electronic display column (13), a control button (16) being provided below the display screen (15), and a probe connector (17) and a magnification adjustment button (18) being provided below the control button (16); A pneumatic probe (2), wherein the pneumatic probe (2) is connected to the probe connector (17) via an air pipe (3), an air inlet (22) connected to the air pipe (3) is provided on the pneumatic probe (2), and a first air passage (23) and a second air passage (24) connected to the air inlet (22) are provided on an end of the pneumatic probe (2) away from the air pipe (3), wherein the first air passage (23) and the second air passage (24) are parallel to each other, and the first air passage (23) The first air channel (23) and the second air channel (24) are respectively located on both sides of the axis extension line of the air inlet channel (22) to form a staggered arrangement; the first air channel (23) and the second air channel (24) respectively penetrate the pneumatic probe (2) to form a first nozzle (231) and a second nozzle (241); the pneumatic probe (2) is provided with two exhaust grooves (25) penetrating the outer wall of the pneumatic probe (2); the first nozzle (231) and the second nozzle (241) are respectively connected to the corresponding exhaust grooves (25).

2. A pneumatic measuring instrument according to claim 1, characterized in that: It also includes a probe handle (27), which is a hollow structure. The air pipe (3) passes through the probe handle (27) and is connected to the air inlet (22). The probe handle (27) is connected to the pneumatic probe (2) via threads.

3. A pneumatic measuring instrument according to claim 2, characterized in that: A flat holding portion (271) is provided on the probe handle (27), and an anti-slip layer is provided on the holding portion (271).

4. A pneumatic measuring instrument according to claim 1, characterized in that: The connection between the two exhaust grooves (25) and the first nozzle (231) and the second nozzle (241) extends outward to form an annular groove (26) capable of wrapping the first nozzle (231) and the second nozzle (241); the first nozzle (231) and the second nozzle (241) are placed in the annular groove (26) and are slightly lower than the height of the annular groove (26).

5. A pneumatic measuring instrument according to claim 1, characterized in that: The pneumatic probe (2) is further provided with a third air channel (28) and a fourth air channel (29), the third air channel (28) and the fourth air channel (29) are parallel to each other, and the third air channel (28) and the fourth air channel (29) are respectively located on both sides of the axis extension line of the air inlet channel (22) to form a staggered arrangement, the third air channel (28) and the fourth air channel (29) respectively penetrate the pneumatic probe (2) to form a third nozzle (281) and a fourth nozzle (291), the pneumatic probe (2) is provided with four groups of exhaust grooves (25) penetrating the outer wall of the pneumatic probe (2), and the first nozzle (231), the second nozzle (241), the third nozzle (281) and the fourth nozzle (291) are respectively disposed in corresponding exhaust grooves (25).

6. A pneumatic measuring instrument according to claim 1, characterized in that: A rounded corner structure (21) is provided at one end of the pneumatic measuring head (2) away from the air pipe (3).

7. A pneumatic measuring instrument according to any one of claims 1 to 6, characterized in that: The leveling structure is an adjustable height adjusting bolt (4) arranged on the base (11).

8. A pneumatic measuring instrument according to claim 1, characterized in that: The leveling structure further comprises a reinforcing bracket (5) formed by extending the base (11) upwards, the reinforcing bracket (5) being trapezoidal in shape as a whole, and a handle (6) connected to an axis is provided on the reinforcing bracket (5).

9. A pneumatic measuring instrument according to claim 7, characterized in that: The electronic display column (13) is a three-color LED lamp column.

10. A pneumatic measuring instrument according to claim 1, characterized in that: The probe connector (17) is a pneumatic quick connector.

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