CN113701938A

CN113701938A - Pressure gauge with different interval scales

Info

Publication number: CN113701938A
Application number: CN202111004208.7A
Authority: CN
Inventors: 王罗平
Original assignee: Kunshan Shiquan Plastic Hardware Products Co ltd
Current assignee: Kunshan Shiquan Plastic Hardware Products Co ltd
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2021-11-26

Abstract

The invention discloses a pressure gauge with scales in different areas, which comprises a piston tube, a piston, an elastic piece, a rotating piece and a pointer. The piston has a plurality of transmission portions, the piston is movably arranged in the piston tube in a sliding mode, the elastic piece is arranged in the piston tube and has elastic force acting on the piston, the rotating piece is provided with a plurality of gears, the pointer is driven by the rotating piece to rotate, therefore, when the piston moves, the transmission portions drive the gears according to the sequence, the gears are respectively meshed with the transmission portions to enable the rotating piece to drive the pointer to rotate, the pressure gauge indicating multiple pressure ranges by a single pointer is achieved, the measuring accuracy of the pointer in a low-pressure range can be particularly improved, the structure is simple, the manufacturing cost is reduced, and meanwhile, the pressure value can be easily and accurately read.

Description

Pressure gauge with different interval scales

Technical Field

The invention relates to the technical field of measuring tools, in particular to a pressure gauge with scales in different intervals.

Background

For example, to confirm the tire pressure of a vehicle, the internal pressure of a pneumatic shock absorber, or the high-pressure gas pressure of industrial equipment and manufacturing processes, a pressure gauge is usually used as a main basis for observing and identifying the pressure.

For example, most of the commonly used bicycle universal air pumps in the market at present are provided with pressure gauges with scales for displaying the pressure of the inflation air, the scales of the pressure gauges are generally arranged in an equidistant interval mode by taking 5Psi or 10Psi as a unit, but the scale arrangement mode often causes great trouble when a professional bicycle player needs to accurately interpret the numerical value of the low-pressure area. In practice, the tire pressure of the bicycle tire can be adjusted according to different routes, road conditions and tire types, so that the tire pressure can be changed according to the environmental requirements in the riding process, and if only one pressure gauge with single same interval scale is used, the pressure cannot be accurately interpreted in a certain interval, so that the tire pressure which needs to be increased or reduced cannot be accurately interpreted in the inflation or deflation process.

Currently, there are related technologies to try to solve the above problems, for example, the TWI336396 patent discloses a pressure gauge capable of displaying different pressure values on two sides, which mainly uses the bourdon tube pressure measuring mechanism to link with the reduction gear to drive two pointers of dials respectively located in different pressure ranges, so that an operator can selectively identify the indication scales and judge the pressure value through the surface scale ranges of the different dials.

The pressure gauge disclosed in TWI647433 includes a main body, a first dial, a second dial, a reduction gear, and a pressure sensing set, the main body is connected to a pressure source, the first dial is disposed on one side of the main body and includes a first pointer and a first scale, the second dial is disposed on the other side of the main body and includes a second pointer and a second scale different from the first scale, the reduction gear is disposed in the chamber and can link the first pointer and the second pointer, the pressure sensing set is disposed in the chamber and includes a plug and an elastic member biasing the plug, the plug can be pushed by a pressure medium to compress the elastic member, the plug links the reduction gear to drive the first pointer and the second pointer to rotate, thereby displaying different pressure scales for easy interpretation.

However, the above-mentioned existing pressure gauges are all relatively complicated in structure, relatively high in manufacturing cost, inconvenient in use of the two dials, difficult in pressure interpretation, and poor in accuracy.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the pressure gauge with the scales in different regions, wherein a single pointer can be used for indicating the scales in the different pressure regions, the structure is simple, the manufacturing cost is reduced, and the pressure value is relatively easy and accurate to read.

The purpose of the invention is realized by the following technical scheme:

a pressure gauge with different scales comprises a piston tube, a piston, an elastic member, a rotating member and a pointer. The piston has a plurality of transmission portions, the piston is movably arranged in the piston tube in a sliding mode, the elastic piece is arranged in the piston tube, the elastic piece has elastic force acting on the piston, the rotating piece is provided with a plurality of gears, the pointer is driven by the rotating piece to rotate, and therefore when the piston moves and the transmission portions drive the gears respectively, the gears are sequentially meshed with the transmission portions to enable the rotating piece to drive the pointer to rotate, and the purpose of indicating pressure with a single pointer is achieved.

Preferably, the piston has an extension arm protruding from one end and extending in the axial direction, and the at least two transmission portions are arranged at intervals or at intervals along the extension arm.

Preferably, the at least two transmission parts are arranged on the outer peripheral surface of the piston.

Preferably, the rotating member has a central shaft, the central shaft forms the at least two gears, and the at least two gears have different diameters and are coaxial with the central shaft.

Preferably, the pressure indicator further comprises a dial, the dial has at least two pressure indicating areas, and the pointer is driven to rotate between the at least two pressure indicating areas according to different rotation amplitudes.

A pressure gauge with different interval scales comprises: a piston, which is provided with at least two transmission parts arranged at intervals; the piston moves to enable the at least two transmission parts to respectively drive the at least two gears, and then the rotating part is rotated; and a pointer, which is driven by the rotating component to rotate.

Preferably, the piston has an extension arm protruding from one end and extending in the axial direction, and the at least two transmission parts are arranged at intervals along the extension arm.

Preferably, the rotating member has a central axis, the central axis forms the at least two gears, and the at least two gears have different diameters.

A pressure gauge with different interval scales comprises: a piston having at least two transmission parts; the rotating part is provided with at least two gears with different diameters, and rotates along with the sequential meshing of the at least two gears by the at least two transmission parts; and a pointer, is driven and rotated by the said rotating part; therefore, when the piston moves, the at least two transmission parts respectively drive the at least two gears, so that the rotating part rotates to drive the pointer to rotate according to different rotating amplitudes.

The invention has the following beneficial effects:

the invention can be widely applied to various occasions needing to measure the pressure, and is particularly suitable for the purpose of indicating different gas pressure ranges by a single pointer.

Drawings

The technical scheme of the invention is further explained by combining the accompanying drawings as follows:

FIG. 1: is an exploded perspective view of a preferred embodiment of the present invention.

FIG. 2: is a top view of a preferred embodiment of the present invention.

FIG. 3: is a front view of a preferred embodiment of the present invention.

FIG. 4: is a right side view of a preferred embodiment of the present invention.

FIG. 5: is a cross-sectional view taken along line 5-5 of figure 3.

FIG. 6: similar to fig. 3, the second gear is mainly shown in combination with the second transmission part.

FIG. 7: is a cross-sectional view taken along line 7-7 of figure 6.

FIG. 8: is an exploded perspective view of another preferred embodiment of the present invention.

FIG. 9: is a front view of another preferred embodiment of the present invention.

FIG. 10: is a right side view of another preferred embodiment of the present invention.

FIG. 11: is a cross-sectional view taken along line 11-11 of fig. 9.

FIG. 12: similar to fig. 9, the third gear is mainly shown in combination with the third transmission part.

FIG. 13: is a cross-sectional view taken along line 13-13 in fig. 12.

FIG. 14: similar to fig. 1, another embodiment of the present invention is mainly shown.

Description of the symbols: 10, a piston tube; 12, opening; 14, sealing the cover; 20, a piston; 22, a first end; 23, sealing element; 24, a second end; 26, an extension arm; 27: a first transmission part; 28, a second transmission part; 30, an elastic piece; 40, a rotating part; 42, a central shaft; 44, a first gear; 46: a second gear; 50, a pointer; 60, a dial scale; 62: a first pressure indicating zone; a second pressure indicating zone; a third pressure indication zone; 70, a piston; 71, a first transmission part; 72, a second transmission part; 73, a third transmission part; 74, a rotating member; 76, a first gear; 77 a second gear; 78, a third gear; 79, a dial; 80, a shell; 82, an air inlet part.

Detailed Description

The technical contents and features of the present invention will be described in detail by referring to the preferred embodiments and the drawings, and the present invention can be widely applied to various occasions requiring pressure measurement, and is particularly suitable for the purpose of indicating different gas pressure ranges by a single pointer.

Throughout the specification, including the embodiments described below and claims, directional terms are used as they relate to the drawings, and the same reference numbers indicate the same or similar elements or features. Those skilled in the art will recognize that the detailed description of the present embodiments is directed to a specific implementation without limitation, such that structural and mechanical elements are included, and not limited to the specific implementations described, such that the terms "a" or "an" or "at least one" in various embodiments encompass one or more than one of the element in quantity, and such description is not intended to limit the scope of the claims.

As shown in fig. 1, the pressure gauge with different scales according to a preferred embodiment of the present invention is mainly disposed inside a housing 80, and the housing 80 has an air inlet 82 for separately externally connecting to a target to be inflated to measure pressure, or for being disposed in an inflator to measure pressure of the target to be inflated.

As shown in fig. 1 to 4, the pressure gauge includes a piston tube 10, a piston 20, an elastic member 30, a rotating member 40, and a pointer 50. The piston tube 10 of the preferred embodiment has an opening 12 extending axially and communicating with the interior space, and one end of the piston tube 10 communicates with the air inlet 82 of the housing 80 and the other end is provided with a cover 14. The piston 20 and the elastic element 30 are both disposed inside the piston tube 10, the piston 20 has a first end 22 and a second end 24, the first end 22 is provided with a sealing element 23 engaged with the inner wall of the piston tube 10 and faces the air inlet 82, the second end 24 of the piston 20 abuts against one end of the elastic element 30, and the other end of the elastic element 30 abuts against the cover 14, in the elastic element 30 of the preferred embodiment, a compression spring is taken as an example, and the elastic force of the elastic element 30 pushes the piston 20 towards the air inlet 82.

In the piston 20 of the preferred embodiment, the extending arm 26 is protruded from the second end 24 and extends toward the first end 22 along the axial direction, and the extending arm 26 is provided with at least two transmission portions, which are exemplified by the first transmission portion 27 and the second transmission portion 28, respectively, and the transmission portions of the piston 20 can be selected from different numbers and different specifications of racks, such as the number of teeth, the tooth width, the modulus, or the pressure angle, which can be selected according to design requirements. The piston 20 is slidably disposed inside the piston tube 10 by the air pressure from the air inlet 82, and the extension arm 26 extends out of the piston tube 10 from the opening 12, and the first transmission portion 27 and the second transmission portion 28 are both located outside the piston tube 10 and are sequentially arranged at intervals or in a staggered manner along a linear path, so as to move synchronously with the piston 20, and the first transmission portion 27 and the second transmission portion 28 of the preferred embodiment are disposed on the extension arm 26 without overlapping each other, or as shown in fig. 14, the first transmission portion 27 and the second transmission portion 28 are directly formed integrally or disposed on the outer circumferential surface of the piston 20 in a staggered manner, and when the piston 20 is slidably disposed in the piston tube 10, the first transmission portion 27 and the second transmission portion 28 of the piston 20 selectively pass through the opening 12 to be combined with the rotating member 40.

The rotating member 40 has a central shaft 42, the periphery of the central shaft 42 forms at least two gears with different diameters and coaxial with the central shaft 42, in the preferred embodiment, a first gear 44 and a second gear 46 are respectively used as an illustration, and the diameter of the first gear 44 is smaller than that of the second gear 46, the central shaft 42 is vertically disposed at a side of the piston tube 10 adjacent to the opening 12, a pointer 50 is disposed at a top end of the central shaft 42, and the pointer 50 is driven by the rotating member 40 to rotate. In addition, a dial 60 is disposed on the central shaft 42, the dial 60 has at least two pressure indication areas, in the preferred embodiment, a first pressure indication area 62 (e.g., 0 to 60PSI) of a low pressure area and a second pressure indication area 64 (e.g., 60 to 160PSI) of a high pressure area are taken as examples, the scale intervals of the first pressure indication area 62 and the second pressure indication area 64 are different, the first pressure indication area has a scale interval of 10PSI, and the second pressure indication area has a scale interval of 30 PSI. The pointer 50 is located above the scale 60, and when the pointer 50 rotates with the rotary member 40, the pressure values are indicated through the first pressure indication area 62 and the second pressure indication area 64 of the scale 60.

When air is introduced into the piston tube 10 through the air inlet 82 of the housing 80, the piston 20 in the piston tube 10 is pushed by the air with different pressures, so that the first transmission portion 27 or the second transmission portion 28 of the extension arm 26 engages with the first gear 44 or the second gear 46, respectively, to drive the rotation member 40 to rotate. As shown in fig. 3 to fig. 5, when the piston 20 is pushed by the low-pressure gas to move from the initial position, the first gear 44 with a smaller diameter is rotated by the first transmission portion 27 with a larger rotation amplitude along the motion path, so as to drive the pointer 50 to rotate faster in the first pressure indication area 62, and the scale interval of the first pressure indication area 62 is more obvious, and is easy to observe and interpret. As shown in fig. 6 to 7, when the piston 20 is pushed by the high-pressure gas, the second gear 46 with a larger diameter is rotated by the second transmission portion 28 engaged with each other along the same motion path in a manner of smaller rotation amplitude, so as to drive the pointer 50 to rotate more slowly in the second pressure indication area 64.

By means of the components, the invention can utilize the transmission parts at different positions to drive the gears with different diameters to enable the pointer to rotate when the piston moves, and the diameters of the different gears and the different positions of the transmission parts enable the pointer to rotate in different amplitudes corresponding to gas pressures, thereby achieving the purposes that the single pointer indicates different gas pressures in a high and low simultaneously on a single dial scale, and achieving the creation purposes of simple structure, low manufacturing cost, simpler and more accurate pressure value interpretation and the like.

Under the same concept of the aforementioned preferred embodiment, a plurality of different pressure indication areas can be added for easier interpretation, for example, fig. 8 to 13 show a pressure gauge with different interval scales provided by another preferred embodiment of the present invention, the main components of which are generally the same as those of the aforementioned preferred embodiment, and the feature is that the piston 70 has a first transmission part 71, a second transmission part 72, and a third transmission part 73, and the rotation part 74 has a first gear 76, a second gear 77, and a third gear 78 which are matched with the piston 70. The diameter of the first gear 76 is the smallest, the diameter of the third gear 78 is the largest, the diameter of the second gear 77 is between the first gear 76 and the second gear 77, and the dial 79 has pressure indication areas with three different scale intervals.

As shown in fig. 9 and 13, when the piston 70 is moved from the initial position by the low pressure gas, the first gear 76 with a smaller diameter is rotated by the first transmission portion 71 with a larger rotation range along the motion path, so as to drive the pointer 50 to rotate faster in the first pressure indication area 62. When the piston 70 is pushed by the higher pressure gas, the second gear 77 having a larger diameter is rotated by the second transmission portion 72 engaged with each other in a slightly smaller rotational amplitude, and the pointer 50 is rotated in a slightly slower manner at the second pressure indication section 64. When the piston 70 is pushed by the highest pressure gas, the third gear 78 with the largest diameter is rotated by the third transmission part 73 with a smaller rotation amplitude, and the pointer 50 rotates in a slower manner at the third pressure indication area 66. The above objects and technical advantages of the present invention can be achieved by using a plurality of sets of gears and corresponding transmission parts with different specifications. It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

Claims

1. The manometer of different interval scales of utensil, its characterized in that: comprises the following steps: a piston tube; the piston is provided with at least two transmission parts and movably and slidably arranged on the piston pipe; the elastic piece is arranged in the piston tube, and the elastic force of the elastic piece acts on the piston; a rotating member having at least two gears; and a pointer, is driven and rotated by the said rotating part; when the piston moves and the at least two transmission parts sequentially drive the at least two gears, the at least two gears are respectively meshed with the at least two transmission parts to enable the rotating part to drive the pointer to rotate.

2. The pressure gauge with scales of different intervals as claimed in claim 1, wherein: the piston is provided with an extension arm which protrudes from one end and extends along the axial direction, and the at least two transmission parts are arranged along the extension arm at intervals or in a staggered manner.

3. The pressure gauge with scales of different intervals as claimed in claim 1, wherein: the at least two transmission parts are arranged on the peripheral surface of the piston.

4. The pressure gauge with scales of different intervals as claimed in claim 1, wherein: the rotating part is provided with a central shaft, the central shaft forms the at least two gears, and the diameters of the at least two gears are different and are coaxial with the central shaft.

5. The pressure gauge with scales of different intervals as claimed in claim 1, wherein: the rotating piece is adjacent to the piston tube, and the pointer is arranged at the top end of the rotating piece.

6. The pressure gauge with scales of different intervals as claimed in claim 1, wherein: the dial is provided with at least two pressure indicating areas, and the pointer is driven to rotate between the at least two pressure indicating areas according to different rotation amplitudes.

7. The utility model provides a manometer of different interval scales which characterized in that: comprises the following steps: a piston, which is provided with at least two transmission parts arranged at intervals; the piston moves to enable the at least two transmission parts to respectively drive the at least two gears, and then the rotating part is rotated; and a pointer, which is driven by the rotating component to rotate.

8. The pressure gauge with scales of different intervals as claimed in claim 7, wherein: the piston is provided with an extension arm which protrudes from one end and extends along the axial direction, and the at least two transmission parts are arranged at intervals along the extension arm.

9. The pressure gauge with scales of different intervals as claimed in claim 7, wherein: the at least two transmission parts are arranged on the peripheral surface of the piston.

10. The pressure gauge with scales of different intervals as claimed in claim 7, wherein: the rotating part is provided with a central shaft, the central shaft forms the at least two gears, and the diameters of the at least two gears are different.

11. The pressure gauge with scales of different intervals as claimed in claim 7, wherein: the rotating piece is arranged at the side position, close to the opening, of the piston pipe, and the pointer is arranged at the top end of the rotating piece.

12. The pressure gauge with scales of different intervals as claimed in claim 7, wherein: the dial is provided with at least two pressure indicating areas, and the pointer is driven to rotate between the at least two pressure indicating areas according to different rotation amplitudes.

13. The utility model provides a manometer of different interval scales which characterized in that: comprises the following steps: a piston having at least two transmission parts; the rotating part is provided with at least two gears with different diameters, and rotates along with the sequential meshing of the at least two gears by the at least two transmission parts; and a pointer, is driven and rotated by the said rotating part; when the piston moves, the at least two transmission parts respectively drive the at least two gears, so that the rotating part rotates to drive the pointer to rotate according to different rotation amplitudes.