Air pressure gauge

Abstract

The utility model belongs to the technical field of barometers, and particularly relates to a barometer which comprises a meter shell, an air inlet, a meter cover, a dial plate and a pointer, the air inlet is arranged on the meter shell, air transmits pressure to a piston through the air inlet, the piston converts the air pressure into linear displacement, and the pointer is arranged on the meter shell. The piston transmits power to the gear output piece through the two-stage transmission mechanism, the gear output piece is connected with the pointer and drives the pointer to deflect on the dial plate, the piston is further connected with a reset piece, and the reset piece acts on the piston and provides pressure opposite to gas acting force. By means of a two-stage transmission mechanism composed of the double sector gears, the rack frame and the cylindrical gear, tiny linear displacement of the piston is amplified and converted into remarkable deflection of the pointer, the detection sensitivity of tiny air pressure changes is remarkably improved, the reading range is expanded, and reading is more accurate and visual.

Description

Technical Field

[0001] This utility model belongs to the field of barometer technology, and specifically relates to a barometer. Background Technology

[0002] A barometer is an instrument that uses an elastic element as its sensing element to measure and indicate pressures higher than ambient pressure. It is extremely widely used, found in almost all industrial processes and scientific research fields. It is ubiquitous in areas such as heat pipe networks, oil and gas transmission, water and gas supply systems, and vehicle repair and maintenance shops. Especially in industrial process control and technical measurement, the barometer's high mechanical strength and ease of production due to the elastic sensing element have led to its increasingly widespread application. A stainless steel barometer consists of a pressure-conducting system (including connectors, Bourdon tubes, and flow-limiting screws), a gear transmission mechanism, a display device (pointer and dial), and a casing (including the case, cover, and glass). The barometer displays pressure by transmitting the elastic deformation of the stainless steel sensing element (Bourdon tube, diaphragm, bellows) through the internal mechanism to the pointer, causing the pointer to rotate.

[0003] Traditional barometers use simple linkage mechanisms or single gear transmissions to convert the tiny linear displacement driven by air pressure into pointer rotation. This conversion ratio is not ideal, resulting in a small pointer deflection angle, making it difficult to read accurately. They are not sensitive to small changes in air pressure, have limited accuracy, and suffer from problems such as low transmission efficiency and insufficient precision. Utility Model Content

[0004] In view of the above-mentioned shortcomings in the prior art, the present invention provides a barometer to solve the problems in the background art.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a barometer, including a casing, an air inlet, a cover, a dial, and a pointer. The air inlet is disposed on the casing, and the gas transmits pressure to a piston through the air inlet. The piston converts the gas pressure into linear displacement. The piston transmits power to a gear output component through a two-stage transmission mechanism. The gear output component is connected to the pointer and drives the pointer to deflect on the dial. The piston is also connected to a reset component, which acts on the piston and provides pressure in the opposite direction to the gas force.

[0006] Preferably, the secondary transmission mechanism includes a transmission component, which includes a first sector gear and a second sector gear. The first sector gear meshes with a rack transmission frame disposed on the piston, and the second sector gear meshes with a gear output component, which is a cylindrical gear. By setting up a two-stage transmission with the first sector gear meshing with the rack transmission frame and the second sector gear meshing with the cylindrical gear, the small linear displacement of the piston is significantly amplified, thereby improving the detection sensitivity and reading accuracy of small air pressure changes.

[0007] Preferably, the casing has an inner base, on which a hollow tube communicating with the air inlet is mounted. A rubber plug is placed inside the hollow tube. A connecting base is located at the bottom of the piston. The connecting base is a tubular structure with an open bottom. The connecting base is fitted onto the hollow tube. The design of the inner base and hollow tube, combined with the rubber plug and the fitting structure of the piston connecting base, effectively reduces gas leakage and friction, ensuring the reliability of pressure transmission and long-term sealing.

[0008] Preferably, the reset element is a spring, with one end of the spring connected to the piston and the other end connected to the fixing component. The use of a spring in the reset element provides stable reverse pressure, enabling the piston to reset quickly and maintaining the zero-point accuracy and response speed of the pressure gauge.

[0009] Preferably, a rack is provided on one side wall of the inner frame of the rack transmission frame, and the rack meshes with the first sector gear. The rack of the rack transmission frame is provided on a single side wall to optimize the meshing efficiency with the first sector gear and reduce energy loss and wear during transmission.

[0010] Preferably, the casing is provided with a sleeve, the sleeve having a groove for linear movement of the rack and pinion drive frame, and a second connecting hole for rotatably connecting with the transmission component. The groove of the sleeve guides the linear movement of the rack and pinion drive frame, reducing vibration and offset, while the second connecting hole fixes the transmission component, enhancing the overall structural rigidity and motion stability.

[0011] Preferably, a mounting base is fixedly connected to the sleeve, the dial is fixed to the top of the mounting base, the cylindrical gear is rotatably connected to the mounting base, and the mounting base is fixed to the sleeve, providing precise support for the dial and the cylindrical gear, ensuring smooth pointer deflection and intuitive reading.

[0012] Compared with the prior art, this utility model has the following advantages:

[0013] 1: Through a two-stage transmission mechanism consisting of double sector gears, rack and pinion transmission frame and cylindrical gear, the tiny linear displacement of the piston is amplified and converted into a significant deflection of the pointer, which significantly improves the detection sensitivity of tiny air pressure changes, expands the reading range, and makes the reading more accurate and intuitive;

[0014] 2. The overall structure is compact and reliable. Combined with the inner base, sleeve and spring reset system, it reduces component friction, vibration and gas leakage, ensuring long-term stability, zero-point accuracy and durability, and reducing maintenance requirements. Attached Figure Description

[0015] Figure 1 This is a schematic cross-sectional view of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the connection structure of the key components of this utility model;

[0017] Figure 3 This is a schematic diagram of the piston and inner base of this utility model;

[0018] Figure 4 This is a schematic diagram of the sleeve structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the transmission component and cylindrical gear of this utility model;

[0020] Figure 6 This is a schematic diagram of the mounting base of this utility model.

[0021] The reference numerals in the accompanying drawings include:

[0022] 1. Watch case; 11. Air inlet; 12. Watch cover; 2. Piston; 21. Rack and pinion drive frame; 22. Connecting base; 23. Spring; 3. Transmission component; 31. First sector gear; 32. Second sector gear; 33. Through hole; 4. Cylindrical gear; 41. Shaft; 5. Inner base; 51. Rubber plug; 52. Hollow tube; 6. Mounting base; 61. First connecting hole; 62. Threaded tube; 7. Sleeve; 71. Slide groove; 72. Second connecting hole; 8. Dial; 81. Hand. Detailed Implementation

[0023] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0025] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" 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 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, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0026] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it 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 utility model based on the specific circumstances.

[0027] like Figure 1-6 As shown, this utility model discloses a barometer, including a housing 1, an air inlet 11, a cover 12, a dial 8, and a pointer 81. The air inlet 11 is located on the housing 1. Gas passes through the air inlet 11 to transmit pressure to a piston 2. The piston 2 converts the gas pressure into linear displacement. The piston 2 transmits power to a gear output component through a two-stage transmission mechanism. The gear output component is connected to the pointer 81 and drives the pointer 81 to deflect on the dial 8. The piston 2 is also connected to a reset component, which acts on the piston 2 and provides pressure opposite to the gas force. The air inlet is located at the center of the bottom of the housing 1 and is opened in a threaded post at the center of the bottom of the housing 1. It can be connected to the working position through the threaded post. The cover 12 is made of transparent material and is connected to the top of the housing 1.

[0028] See Figure 1 and Figure 2 In this embodiment: the secondary transmission mechanism includes a transmission component 3, which includes a first sector gear 31 and a second sector gear 32. The first sector gear 31 meshes with a rack transmission frame 21 disposed on the piston 2, and the second sector gear 32 meshes with a gear output component, which is a cylindrical gear 4. The first sector gear 31 and the second sector gear 32 are fixedly connected, and their teeth are perpendicular to each other.

[0029] See Figure 1 and Figure 3In this embodiment: an inner base 5 is provided inside the watch case 1, and a hollow tube 52 communicating with the air inlet 11 is provided on the inner base 5. A rubber plug 51 is provided inside the hollow tube 52. A connecting base 22 is provided at the bottom of the piston 2. The connecting base 22 is a tubular structure with an opening at the bottom and is sleeved on the hollow tube 52. The inner base 5 is fixed to the bottom surface inside the watch case 1, the rubber plug 51 is provided inside the hollow tube 52, and the connecting base 22 is sleeved on the outer wall of the hollow tube 52.

[0030] See Figure 1 In this embodiment: the reset component is a spring 23, one end of which is connected to the piston 2 and the other end is connected to the fixing component; wherein one end of the spring 23 is connected to the upper surface of the piston 2 and the other end is connected to the inner top surface of the sleeve 7.

[0031] See Figure 1 and Figure 3 In this embodiment: a rack is provided on one side wall of the inner frame of the rack transmission frame 21, and the rack meshes with the first sector gear 31; wherein the rack is provided on the side wall of the inner frame of the rack transmission frame 21, and the rack is arranged on one side.

[0032] See Figure 1 and Figure 4 In this embodiment: a sleeve 7 is provided inside the watch case. The sleeve 7 has a groove 71 for linear movement of the rack and pinion drive frame 21. The sleeve 7 also has a second connecting hole 72 for rotatably connecting with the transmission component 3. The second connecting hole 72 is rotatably connected to the transmission component 3 by a pin or shaft to ensure stable rotation of the transmission component 3. At the same time, the direction of the groove 71 is parallel to the linear displacement direction of the piston 2 to avoid interference between the rack and pinion drive frame 21 and the sleeve 7 during movement.

[0033] See Figure 1 and Figure 2 In this embodiment: a mounting base 6 is fixedly connected to the sleeve 7, the dial 8 is fixed to the top of the mounting base 6, and the cylindrical gear 4 is rotatably connected to the mounting base 6; wherein the cylindrical gear 4 is rotatably connected to the mounting base 6 through a rotating shaft 41, one end of the rotating shaft 41 passes through the dial 8 and is connected to the pointer 81, and a threaded tube 62 is also provided on the mounting base 6, through which the dial 8 is connected using screws or threaded connectors.

[0034] The working principle of this utility model is as follows: gas enters the interior of the watch case 1 through the air inlet 11, pushing the piston 2 to produce a vertical linear displacement. This linear displacement is transmitted to the first sector gear 31 of the transmission component 3 through the rack and pinion transmission frame 21 on the piston 2. The first sector gear 31 rotates and drives the second sector gear 32, which is fixedly connected to it, to rotate synchronously. The second sector gear 32 drives the cylindrical gear 4 to rotate. The cylindrical gear 4 drives the pointer 81 to deflect on the dial 8, thereby amplifying the display of the air pressure value. When the air pressure decreases, the spring 23 applies reverse pressure to the piston 2, causing the piston 2 and the rack and pinion transmission frame 21 to return to the initial position. At the same time, it drives the transmission component 3 and the cylindrical gear 4 to rotate, and the pointer 81 returns to zero.

[0035] Through the meshing of the rack and pinion drive frame 21 with the first sector gear 31, the linkage between the first sector gear 31 and the second sector gear 32, and the meshing of the second sector gear 32 with the cylindrical gear 4, a two-stage transmission amplification is formed, which converts the small linear displacement of the piston 2 into a significant deflection of the pointer 81. The spring 23 always provides a counterforce. The displacement of the piston 2 is linearly related to the air pressure and can be reset. During the transmission process, the rack and pinion drive frame 21 is guided to move linearly by the slide groove 71 of the sleeve 7, and the cylindrical gear 4 is supported by the mounting base 6 to ensure the stability of the movement and the accuracy of the reading.

[0036] The above are merely embodiments of this utility model. The circuits, electronic components, and modules involved are all prior art, fully achievable by those skilled in the art, and require no further explanation. The content protected by this application does not involve improvements to the software or methods. Commonly known structures and characteristics in the solution are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field to which this utility model pertains prior to the application date or priority date, are able to access all existing technologies in that field, and possess the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in conjunction with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model. These should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. A barometer, comprising a casing (1), an air inlet (11), a cover (12), a dial (8), and a pointer (81), characterized in that: The air inlet (11) is located on the case (1). Gas passes through the air inlet (11) and transmits pressure to the piston (2). The piston (2) converts the gas pressure into linear displacement. The piston (2) transmits power to the gear output component through a secondary transmission mechanism. The gear output component is connected to the pointer (81) and drives the pointer (81) to deflect on the dial (8). The piston (2) is also connected to a reset component. The reset component acts on the piston (2) and provides pressure opposite to the gas force.

2. A barometer according to claim 1, characterized in that: The secondary transmission mechanism includes a transmission component (3), which includes a first sector gear (31) and a second sector gear (32). The first sector gear (31) meshes with a rack transmission frame (21) disposed on the piston (2), and the second sector gear (32) meshes with a gear output component, which is a cylindrical gear (4).

3. A barometer according to claim 1, characterized in that: The casing (1) is provided with an inner base (5), and a hollow tube (52) communicating with the air inlet (11) is provided on the inner base (5). A rubber plug (51) is provided inside the hollow tube (52). A connecting base (22) is provided at the bottom of the piston (2). The connecting base (22) is a tubular structure with an opening at the bottom. The connecting base (22) is sleeved on the hollow tube (52).

4. A barometer according to claim 1, characterized in that: The reset component is a spring (23), one end of which is connected to the piston (2), and the other end is connected to the fixing component.

5. A barometer according to claim 2, characterized in that: A rack is provided on one side wall of the inner frame of the rack transmission frame (21), and the rack meshes with the first sector gear (31).

6. A barometer according to claim 2, characterized in that: The watch case is provided with a sleeve (7), and the sleeve (7) is provided with a groove (71) for linear movement of the rack and pinion transmission frame (21). The sleeve (7) is also provided with a second connecting hole (72) for rotatably connecting with the transmission component (3).

7. A barometer according to claim 6, characterized in that: The sleeve (7) is fixedly connected to the mounting base (6), the dial (8) is fixed to the top of the mounting base (6), and the cylindrical gear (4) is rotatably connected to the mounting base (6).

Images