Pneumatic structure

Abstract

The utility model aims to provide a pneumatic structure which is used for driving a sensor, a driving shaft is arranged on the sensor, the pneumatic structure comprises a shell and a driving assembly, the shell is arranged on the sensor, a cavity and a clamping groove are formed in the shell, the clamping groove and the cavity are coaxially arranged, the clamping groove and the cavity are communicated with each other, the driving shaft is located in the cavity, and the driving assembly is arranged on the shell. The driving assembly comprises a pressing ring, a connecting ring and a driving part, the connecting ring is coaxially clamped in the clamping groove, the connecting ring is sleeved with the pressing ring, the circumferential surface of the pressing ring is in threaded connection with the inner side wall of the clamping groove so that the pressing ring and the shell can jointly clamp the connecting ring, the driving part is coaxially arranged on the connecting ring, and the driving part is in threaded connection with the inner side wall of the clamping groove. And an output shaft of the driving piece penetrates through the connecting ring, extends into the cavity and is propped against the driving shaft, so that the driving piece drives the sensor. Therefore, the processing difficulty and the processing cost are reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of measuring instrument manufacturing, and in particular to a pneumatic structure. Background Technology

[0002] In today's era of rapid technological advancement, measuring instruments play an indispensable role in numerous fields. From quality control in industrial production to data acquisition in scientific research experiments, and precise testing in medical diagnosis, measuring instruments are ubiquitous. In the industrial sector, precision measuring instruments are used to inspect the dimensional accuracy of components, ensuring that products meet stringent quality standards. For example, pneumatically driven displacement sensors, used in mechanical structure measurement, can accurately measure changes in the position of objects and are key components ensuring the precise operation of mechanical equipment.

[0003] However, existing displacement sensors have the following shortcomings in actual production: their pneumatic structure has air inlet and outlet ports located on two different parts. To ensure the airtightness of the two parts after assembly, extremely high machining precision is required, which increases the machining difficulty and cost. In view of this, the pneumatic structure proposed in this application is proposed. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a pneumatic structure that can reduce processing difficulty and processing cost.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A pneumatic structure for driving a sensor, wherein a drive shaft is disposed on the sensor, comprising:

[0007] A housing is disposed on the sensor. The housing has a cavity and a slot. The slot is coaxially aligned with the cavity and communicates with it. The drive shaft is located within the cavity.

[0008] The driving assembly includes a pressure ring, a connecting ring, and a driving component. The connecting ring is coaxially engaged in the slot. The pressure ring is sleeved on the connecting ring, and the circumferential surface of the pressure ring is screwed to the inner wall of the slot, so that the pressure ring and the housing together clamp the connecting ring. The driving component is coaxially disposed on the connecting ring, and the output shaft of the driving component passes through the connecting ring and extends into the cavity to abut against the driving shaft, so that the driving component drives the sensor.

[0009] Optionally, the connecting ring is provided with a locking platform, one side of which abuts against the inner bottom wall of the slot, and the end of the pressure ring abuts against the side of the locking platform away from the inner bottom wall of the slot.

[0010] Optionally, the diameter of the slot is larger than the diameter of the cavity.

[0011] Optionally, the drive assembly further includes an end cap, a sliding hole is provided on the housing, the end cap is disposed on the housing, and the end cap seals one end of the sliding hole to form the cavity, and the slot is located on the end of the sliding hole away from the end cap.

[0012] Optionally, the drive assembly further includes a cavity tube, a limiting portion is provided in the sliding hole, the cavity tube is located in the cavity, and both ends of the cavity tube abut against the end cap and the limiting portion, respectively.

[0013] Optionally, the drive assembly further includes a top block and a return spring. The return spring is located inside the cavity, the top block is sleeved on the output shaft of the drive member, the return spring abuts against the end cover and the top block respectively, and the top block abuts against the drive shaft.

[0014] Optionally, the housing has an oblong hole, the cavity tube has a through hole, the through hole penetrates the inner and outer side walls of the cavity tube and communicates with the oblong hole, and the drive shaft passes through the oblong hole and the through hole and abuts against the top block.

[0015] Optionally, the width of the perforation is greater than the width of the waist-shaped hole.

[0016] Optionally, the drive assembly further includes a buffer disposed on the housing and located at the end of the oblong hole away from the top block, the buffer being used to abut against the drive shaft.

[0017] Optionally, the drive assembly further includes a plurality of seals, each of which is respectively fitted onto the drive assembly, the connecting ring, and the end cap, so that the seals together seal the cavity.

[0018] Compared with the prior art, the present invention has at least the following advantages:

[0019] The pneumatic structure of this utility model sets the driving component on the connecting ring, and the connecting ring is fixed to the housing by the pressure ring, and the output shaft of the driving component extends into the cavity on the housing. In this way, there is no need to open air holes on the housing, thereby reducing the processing difficulty and processing cost. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a structural schematic diagram of the housing mounting position according to one embodiment of the present invention;

[0022] Figure 2 This is a cross-sectional schematic diagram of the aerodynamic structure according to one embodiment of the present invention;

[0023] Figure 3 for Figure 2 A magnified schematic diagram of the structure of part A in the diagram;

[0024] Figure 4 This is a schematic cross-sectional view of the top block away from the limiting part according to one embodiment of the present invention;

[0025] Figure 5 for Figure 4 A magnified schematic diagram of the partial structure of B in the diagram;

[0026] Figure 6 A structural schematic diagram showing the location of the waist-shaped hole in one embodiment of this utility model;

[0027] Figure 7 This is a schematic diagram of the shell structure according to one embodiment of the present invention;

[0028] Figure 8 This is a cross-sectional structural diagram of the shell according to one embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the connecting ring according to one embodiment of the present invention;

[0030] Figure 10 This is a schematic diagram of the pressure ring according to one embodiment of the present invention;

[0031] Figure 11 This is a schematic diagram of the cavity tube according to one embodiment of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Pneumatic structure; 10. Sensor; 11. Drive shaft; 20. Housing; 21. Cavity; 22. Slot; 23. Sliding hole; 231. Limiting part; 24. Waist-shaped hole; 30. Drive assembly; 31. Pressure ring; 32. Connecting ring; 321. Slot; 33. Drive component; 34. End cover; 331. Cylinder; 332. Plug; 333. Output shaft; 3311. Air inlet; 3312. Air outlet; 35. Top block; 353. Slot; 36. Return spring; 37. Cavity tube; 371. Perforation; 381. First seal; 382. Second seal; 383. Third seal; 384. Fourth seal. Detailed Implementation

[0034] To facilitate understanding of this utility model, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model.

[0035] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0038] like Figures 1 to 5 , Figures 7 to 10As shown, in one embodiment, a pneumatic structure 1 is used to drive a sensor 10. The sensor 10 has a drive shaft 11. The structure includes a housing 20 and a drive assembly 30. The housing 20 is disposed on the sensor 10 and has a cavity 21 and a slot 22. The slot 22 is coaxially arranged with the cavity 21 and communicates with it. The drive shaft 11 is located inside the cavity 21. The drive assembly 30 includes a pressure ring 31 and a connecting ring 3. 2. The drive component 33 and the connecting ring 32 are coaxially engaged in the slot 22. The pressure ring 31 is sleeved on the connecting ring 32, and the circumferential surface of the pressure ring 31 is screwed to the inner wall of the slot 22, so that the pressure ring 31 and the housing 20 together clamp the connecting ring 32. The drive component 33 is coaxially disposed on the connecting ring 32, and the output shaft 333 of the drive component 33 passes through the connecting ring 32 and extends into the cavity 21 to abut against the drive shaft 11, so that the drive component 33 drives the sensor 10. For example, the sensor 10 is a displacement sensor.

[0039] It should be noted that the housing 20 is disposed on the sensor 10, and a sliding hole 23 is provided on the housing 20, which passes through the two opposing ends of the housing 20. The drive assembly 30 also includes an end cap 34, which is disposed on the housing 20 and blocks one end of the sliding hole 23, so that the sliding hole 23 and the end cap 34 together form a cavity 21. Furthermore, a slot 22 is also provided on the housing 20, which is located on the end of the sliding hole 23 away from the end cap 34. The slot 22 is coaxially arranged with the sliding hole 23, and the inner bottom wall of the slot 22 communicates with the sliding hole 23. The diameter of the slot 22 is larger than the diameter of the sliding hole 23, so that a boss is formed between the inner bottom wall of the slot 22 and the sliding hole 23. Furthermore, the connecting ring 32 is a circular ring structure, and the connecting ring 32 is provided with a retaining platform 321, which is arranged along the circumference of the connecting ring 32. One side of the locking platform 321 abuts against the boss, allowing the connecting ring 32 to engage with the slot 22. Furthermore, the pressure ring 31 is also a circular structure, fitted onto the connecting ring 32. The outer diameter of the pressure ring 31 is smaller than the diameter of the slot 22. The outer side of the pressure ring 31 is screwed to the inner wall of the slot 22, so that one end of the pressure ring 31 abuts against the locking platform 321 on the connecting ring 32, thereby fixing the connecting ring 32 within the slot 22. Furthermore, the drive component 33 is a cylinder structure, for example, a standard cylinder structure. The drive component 33 includes a cylinder body 331, a plug 332, and an output shaft 333. The cylinder body 331 has an air inlet 3311 and an air outlet 3312 at both ends. The plug 332 slides within the cylinder body 331 and is located between the air inlet 3311 and the air outlet 3312. One end of the output shaft 333 is mounted on the plug 332, while the other end extends from one end of the cylinder body 331. Further, one end of the cylinder body 331 is screwed to the inner wall of the connecting ring 32, and the output shaft 333 extends from the end of the cylinder body 331 screwed to the connecting ring 32, passing through the connecting ring 32 and extending into the cavity 21. This fixes the drive component 33 to the housing 20. Furthermore, a drive shaft 11 is provided on the sensor 10, and the housing 20 is provided on the sensor 10, so that the drive shaft 11 on the sensor 10 is located inside the cavity 21 and abuts against the output shaft 333 of the drive member 33, thereby causing the drive member 33 to drive the sensor 10.

[0040] It should be noted that since the drive component 33 is a standard cylinder, there is no need to separately machine air holes on the housing 20, thereby reducing the machining difficulty and cost. Moreover, it can avoid poor air tightness due to the difference in machining accuracy of the air holes on the two parts during assembly, which would affect the measurement quality of the sensor 10.

[0041] like Figures 1 to 6 , Figure 11As shown, in one embodiment, the drive assembly 30 further includes a top block 35 and a reset spring 36. The reset spring 36 is a spring structure and is located inside the cavity tube 37. The top block 35 is sleeved on the output shaft 333 of the drive member 33. The reset spring 36 abuts against the end cover 34 and the top block 35 respectively. The top block 35 abuts against the drive shaft 11.

[0042] It should be noted that a limiting part 231 is provided inside the sliding hole 23. The limiting part 231 is located between the sliding hole 23 and the slot 22, and the diameter of the limiting part 231 is smaller than the diameter of the sliding hole 23. The drive assembly 30 also includes a cavity tube 37, which is located inside the cavity 21. One end of the cavity tube 37 abuts against the limiting part 231, and the other end of the cavity tube 37 abuts against the end cap 34. When the end cap 34 is screwed to the inner wall of the sliding hole 23, the end cap 34 and the limiting part 231 together clamp the cavity tube 37. Furthermore, the outer diameter of the cavity tube 37 is the same as the diameter of the sliding hole 23, so that the cavity tube 37 can fit tightly against the inner wall of the sliding hole 23.

[0043] It should be noted that the diameter of the return spring 36 is smaller than the inner diameter of the cavity tube 37, allowing the return spring 36 to be located inside the cavity tube 37. Further, the top block 35 includes a circular portion and a cylindrical portion, with the cylindrical portion disposed on the circular portion. The diameter of the circular portion is larger than that of the cylindrical portion, making the top block 35 tend towards a T-shaped structure. A slot 353 is provided on the top block 35, located on the side of the circular portion away from the cylindrical portion, and the slot 353 extends from the circular portion towards the cylindrical portion. The diameter of the slot 353 is adapted to the diameter of the output shaft 333 of the drive member 33, and the end of the output shaft 333 of the drive member 33 is inserted into the slot 353. Furthermore, the outer diameter of the cylindrical portion is smaller than the minimum diameter of the return spring 36. This allows the two ends of the return spring 36 to push the top cover 34 and the circular portion on the top block 35 respectively, thereby causing the return spring 36 to push the top block 35 to slide within the cavity 21. This, in turn, causes the top block 35 to push the output shaft 333 of the drive member 33 away from the cavity 21. Furthermore, the top block 35 also has a through hole located on the end face of the cylindrical portion away from the circular portion, and this through hole communicates with the slot 353. This allows air inside the slot 353 to escape through the through hole when the output shaft 333 is inserted into the slot 353.

[0044] like Figure 2 , Figure 4 , Figure 6 As shown, in one embodiment, the housing 20 has an oblong hole 24 and the cavity tube 37 has a through hole 371. The through hole 371 penetrates the inner and outer side walls of the cavity tube 37 and is connected to the oblong hole 24. The drive shaft 11 passes through the oblong hole 24 and the through hole 371 and abuts against the top block 35.

[0045] It should be noted that the cavity tube 37 has a through hole 371. For example, the through hole 371 is a notch structure, with the notch extending from one end of the cavity tube 37 to the other end, and the width of the notch is greater than the width of the oblong hole 24. The two ends of the oblong hole 24 are respectively close to the two ends of the cavity 21. Furthermore, the oblong hole 24 communicates with the notch, allowing the drive shaft 11 to pass through the oblong hole 24 and the notch and extend into the cavity tube 37. It should be noted that the diameter of the drive shaft 11 is the same as the width of the oblong hole 24, so that the drive shaft 11 can only slide between the two ends of the oblong hole 24 in the axial direction of the cavity tube 37.

[0046] It should be noted that the side of the circular portion away from the cylindrical portion abuts against the drive shaft 11. Thus, when the air inlet of the drive member 33 is connected to the air pipe, the output shaft 333 of the drive member 33 pushes the top block 35 to compress the return spring 36, causing the top block 35 to approach the end of the oblong hole 24 away from the limiting portion 231. This allows the drive shaft 11 to slide to the end of the oblong hole 24 away from the limiting portion 231. When the air inlet 3311 of the drive member 33 is disconnected from the air pipe, the return spring 36 pushes the top block 35 towards the limiting portion 231, causing the top block 35 to move the output shaft 333 of the drive member 33 away from the cavity 21. At the same time, it causes the drive shaft 11 to slide to the end of the oblong hole 24 near the limiting portion 231, thereby causing the top block 35 to push the drive shaft 11 back to its initial position. For example, the drive shaft 11 is kept in an extended state. When one end of the drive shaft 11 abuts against the top block 35, the top block 35 pushes the drive shaft 11 back to its initial position under the push of the return spring 36. When the air inlet 3311 of the drive member 33 is connected to the air pipe, the output shaft 333 of the drive member 33 pushes the top block 35 to compress the return spring 36, thereby allowing the drive shaft 11 to slide back and forth between the two ends of the oblong hole 24. Since the drive shaft 11 is kept in an extended state, when the top block 35 is pushed away from the limiting part 231 by the output shaft 333, the drive shaft 11 will slide from the end of the oblong hole 24 near the limiting part 231 to the other end of the oblong hole 24. Further, for example, the drive shaft 11 is kept in an extended state by a push spring, and the spring force of the push spring is less than the spring force of the return spring 36, so that the return spring 36 can push the top block 35 to return the drive shaft 11 to its initial position.

[0047] like Figure 6 As shown, in one embodiment, the drive assembly 30 further includes a buffer member disposed on the housing 20 and located at the end of the waist-shaped hole 24 away from the top block 35. The buffer member is used to abut against the drive shaft 11.

[0048] It should be noted that the buffer is made of rubber. When the drive shaft 11 slides away from the limiting part 231, it prevents the output shaft 333 of the drive member 33 from pushing the top block 35 away from the limiting part 231 quickly. This would prevent the drive shaft 11 from sliding away from the limiting part 231 quickly and colliding with the inner wall of the waist-shaped hole 24, thus causing the sensor 10 to become inaccurate. Specifically, at the instant the air inlet 3311 connects with the air pipe, the airflow will instantly push the output shaft 333 quickly into the cavity 21, pushing the top block 35 away from the limiting part 231 quickly to squeeze the return spring 36. At this time, the return spring 36 will instantly lose the force of pushing the drive shaft 11. In this case, the push spring instantly loses the pushing force, so the push spring instantly drives the drive shaft 11 to slide from the end of the waist-shaped hole 24 near the limiting part 231 to the other end, making it easy for the drive shaft 11 to hit the inner wall of the waist-shaped hole 24 away from the limiting part 231. Thus, a buffer is provided at the end of the waist-shaped hole 24 away from the limiting part 231 to prevent the drive shaft 11 from being impacted and reducing the measurement accuracy of the sensor 10.

[0049] like Figures 2 to 4 As shown, in one embodiment, the drive assembly 30 further includes a plurality of seals, each of which is respectively fitted onto the drive assembly 33, the connecting ring 32 and the end cap 34, so that the seals together seal the cavity 21.

[0050] It should be noted that the seals are circular structures made of rubber. For ease of description, each seal is defined as the first seal 381, the second seal 382, ​​the third seal 383, and the fourth seal 384. The first seal 381 is sleeved on one end of the cylinder 331 of the drive member 33, and the first seal 381 is located between the drive member 33 and the connecting ring 32. The second seal 382 is sleeved on the end of the connecting ring 32 away from the drive member 33, and the second seal 382 is located between the connecting ring 32 and the inner bottom wall of the groove 22. The third sealing element 383 is sleeved on the end cap 34 and located between the end cap 34 and the housing 20, so that the end cap 34 seals one end of the sliding hole 23. The fourth sealing element 384 is disposed on the side of the housing 20 facing the sensor 10. When the housing 20 is connected to the sensor 10, the fourth sealing element 384 can seal the gap between the housing 20 and the sensor 10, so that all the sealing elements together seal the cavity 21 on the housing 20. In this way, the connection position between each part is sealed.

[0051] like Figures 2 to 4 , Figures 9 to 10As shown, in one embodiment, the pressure ring 31 is screwed to the inner wall of the slot 22 to press the connecting ring 32. When the pressure ring 31 loosens the connecting ring 32, the connecting ring 32 can rotate relative to the slot 22. The driving member 33 is screwed onto the connecting ring 32, so that the connecting ring 32 can drive the driving member 33 to rotate relative to the housing 20. In this way, the driving member 33 can rotate and adjust the orientation of the air inlet 3311 and the air outlet 3312 according to the actual installation conditions on site. Then, by tightening the pressure ring 31 to fix the connecting ring 32, the driving member 33 can adjust the orientation of the air inlet 3311 and the air outlet 3312 to meet the installation requirements on site.

[0052] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A pneumatic structure for driving a sensor, the sensor being provided with a drive shaft, characterized in that, The utility model relates to a sensor driving device, which comprises a sensor, a shell provided on the sensor, a cavity and a clamping groove provided on the shell, the clamping groove being coaxially arranged with the cavity and being in communication with the cavity, and a driving shaft being located in the cavity; and a driving assembly comprising a pressing ring, a connecting ring and a driving member, the connecting ring being coaxially clamped in the clamping groove, the pressing ring being sleeved on the connecting ring, and the circumferential surface of the pressing ring being screwed with the inner side wall of the clamping groove so that the pressing ring and the shell jointly clamp the connecting ring, the driving member being coaxially arranged on the connecting ring, and the output shaft of the driving member penetrating through the connecting ring and extending into the cavity to abut against the driving shaft so that the driving member drives the sensor. The connecting ring is provided with a clamping platform, one side surface of the clamping platform abutting against the inner bottom wall of the clamping groove, and the end of the pressing ring abutting against the side surface of the clamping platform away from the inner bottom wall of the clamping groove. The diameter of the clamping groove is greater than the diameter of the cavity.

2. Aerodynamic structure according to claim 1, characterized in that, The driving assembly further comprises an end cover, the shell is provided with a sliding hole, the end cover is arranged on the shell, and the end cover seals one end of the sliding hole to form the cavity, and the clamping groove is located on the end of the sliding hole away from the end cover.

3. Aerodynamic structure according to claim 2, characterized in that, The driving assembly further comprises a cavity tube, the sliding hole is provided with a limiting portion, the cavity tube is located in the cavity, and the two ends of the cavity tube respectively abut against the end cover and the limiting portion.

4. The pneumatic structure of claim 1, wherein, The driving assembly further comprises a top block and a return spring, the return spring is located in the cavity tube, the top block is sleeved on the output shaft of the driving member, the return spring respectively abuts against the end cover and the top block, and the top block abuts against the driving shaft.

5. Aerodynamic structure according to claim 4, characterized in that, The shell is provided with a waist-shaped hole, the cavity tube is provided with a through hole penetrating through the inner and outer side walls of the cavity tube, the through hole is in communication with the waist-shaped hole, and the driving shaft penetrates through the waist-shaped hole and the through hole to abut against the top block.

6. Aerodynamic structure according to claim 5, characterized in that, The width of the through hole is greater than the width of the waist-shaped hole.

7. Aerodynamic structure according to claim 6, characterized in that, The driving assembly further comprises a buffer, the buffer is arranged on the shell, and the buffer is located at the end of the waist-shaped hole away from the top block, the buffer being used to abut against the driving shaft.

8. Aerodynamic structure according to claim 7, characterized in that, The driving assembly further comprises a plurality of sealing members, each of the sealing members is sleeved on the driving member, the connecting ring and the end cover so that the sealing members jointly seal the cavity.

9. Aerodynamic structure according to claim 8, characterized in that, ​ 10. Aerodynamic structure according to claim 9, characterized in that, ​

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