CN212378953U

CN212378953U - Pressure gauge

Info

Publication number: CN212378953U
Application number: CN202021834320.4U
Authority: CN
Inventors: 邓平
Original assignee: Yuyao Maijieke Plastic Technology Co ltd
Current assignee: Yuyao Maijieke Plastic Technology Co ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2021-01-19
Anticipated expiration: 2030-08-27

Abstract

The utility model relates to a pressure gauge, which comprises a meter shell, a dial, a pointer and a conversion structure, wherein the bottom of the meter shell is provided with an introduction hole; the method is characterized in that: the conversion structure comprises a transmission shaft, the transmission shaft is constrained in the watch case and can rotate around the axis of the transmission shaft, a first transmission tooth part is arranged on the outer peripheral wall of the transmission shaft, and the upper end of the transmission shaft is fixed with the pointer; the transmission seat is arranged in the watch case and can move up and down, the transmission seat can move up under the drive of air pressure introduced from the introduction hole, and a rack part which is vertically arranged is arranged on the transmission seat; the supporting spring acts on the transmission seat and enables the transmission seat to keep the trend of downwards moving to block the lead-in hole; and the transmission plate is rotatably arranged in the watch case and can swing left and right, a second transmission tooth part meshed with the first transmission tooth part is arranged at the upper part of the transmission plate, and a gear part meshed with the rack part in a transmission manner is arranged at the lower part of the transmission plate. The anti-shake and anti-falling pointer has the advantages of compact structure, shock resistance, high detection precision and difficulty in shaking of the pointer due to external force.

Description

Pressure gauge

Technical Field

The utility model relates to a manometer for detecting atmospheric pressure, this manometer is fit for being used for various products that need detect atmospheric pressure such as hand power inflator, electronic air pump, inflatable tent, inflatable boat.

Background

The working principle of the pressure gauge is that the pressure deformation is transmitted to the pointer through the elastic deformation of sensitive elements (Bourdon tube, bellows and bellows) in the gauge and then through a conversion mechanism of a movement in the gauge, so that the pointer is caused to rotate to display the pressure. Spring tubes (Bourdon tubes) are classified into types of tubes, coil springs, spiral tubes and the like, and generally adopt cold-work hardening type blank tubes, have high plasticity in an annealing state, and obtain high elasticity and strength after pressure processing, cold-work hardening and qualitative treatment. Under the action of the pressure in the inner cavity, the spring tube can convert the pressure into the elastic displacement of the free end of the spring tube conveniently by utilizing the elastic characteristic of the spring tube. The measuring range of the spring tube is generally that the sensitive element of the diaphragm is a round diaphragm with waves, one side of the diaphragm is pressed by a measuring medium, so that the tiny bending deformation generated by the diaphragm can be used for indirectly measuring the pressure of the medium, and the magnitude of the pressure is displayed by a pointer. The diaphragm has a larger force transmission than the bourdon tube, and the diaphragm itself has a better vibration resistance because its peripheral edge is fixed. The diaphragm pressure gauge can achieve high overpressure protection (for example, the diaphragm is attached to an upper flange plate), the diaphragm can be additionally provided with a protective coating to improve corrosion resistance, the diaphragm pressure gauge can be used for measuring media with high viscosity, unclean and crystallization by using measures such as opening flanges, flushing, opening and the like, and the pressure measurement range of the diaphragm pressure gauge is 1600-2.5 MPa.

The pressure gauge for detecting air pressure is manufactured through a thread transmission structure in the current market, a transmission part mainly comprises a transmission shaft and a transmission seat, the transmission seat can move up and down under the action of air pressure drive introduced from an introduction hole and a support spring through thread matching between the transmission shaft and the transmission seat, the transmission seat is converted into rotary motion of the transmission shaft, and finally, a pointer is driven to rotate. In order to reduce resistance, a transmission shaft with a larger pitch is required to be adopted, so that the transmission is not stable, the pointer is easy to shake when external force is applied, the indicating precision of the pointer is lower, and the anti-seismic effect is extremely poor

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to above-mentioned prior art current situation and provide a compact structure, take precautions against earthquakes anti-fall, detect the manometer that the precision is high, the pointer receives the difficult shake of external force.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a pressure gauge comprises a shell, a dial, a pointer and a conversion structure, wherein the dial, the pointer and the conversion structure are arranged in the shell, the conversion structure is used for transmitting pressure deformation to the pointer to cause the pointer to rotate, and an introduction hole for introducing external pressure and acting on the conversion structure is formed in the bottom of the shell; the method is characterized in that: the conversion structure comprises

The transmission shaft is axially constrained in the watch case and can rotate around the axis of the transmission shaft, a first transmission tooth part is arranged on the outer peripheral wall of the transmission shaft, and the upper end of the transmission shaft penetrates through the dial and then is fixed with the pointer;

the transmission seat is arranged in the watch case and can move up and down, the transmission seat can move up under the drive of air pressure introduced from the introduction hole, and a rack part which is vertically arranged is arranged on the transmission seat;

the supporting spring acts on the transmission seat and enables the transmission seat to keep the trend of downwards moving to block the introduction hole;

the transmission plate is rotatably arranged in the watch case and can swing left and right, the upper portion of the transmission plate is provided with a second transmission tooth portion meshed with the first transmission tooth portion, the transmission shaft can be driven by the swing of the transmission plate to rotate clockwise or anticlockwise around the axis of the transmission plate, and the lower portion of the transmission plate is provided with a gear portion meshed with the rack portion in a transmission mode, so that the transmission plate can be driven by the transmission seat to swing left and right by the up-down movement of the transmission seat.

Preferably, the transmission plate has a fan-shaped base plate portion and a convex portion located below the base plate portion and protruding forward, and the second transmission tooth portion is an end face tooth formed on the upper portion of the end face of the base plate portion and arranged in an arc shape; the side surface of the lug part is arc-shaped, and the teeth of the gear part are arranged on the side surface of the lug part; the transmission seat is characterized in that the upper portion of the transmission seat is upwards protruded, a rectangular hole penetrating through the transmission seat along the front-back direction is formed in the transmission portion, the rack portion is arranged on the inner side wall of the rectangular hole, and the gear portion extends into the rectangular hole. Aforementioned driving plate structural configuration is reasonable, and the terminal surface tooth that is the arc overall arrangement does benefit to and meshes with the epaxial first transmission tooth portion of transmission, and the gear portion stretches into the inside each parts overall arrangement compactness of watchcase that makes in this rectangular hole, can be very little of doing the manometer.

The improved watch case comprises an outer shell, an inner shell, a mounting seat and an upper cover made of transparent materials, wherein the inner shell is embedded in the outer shell, the mounting seat is fixed on the top surface of the inner shell, a transmission shaft is installed on the mounting seat, a dial is placed and fixed on the upper end surface of the mounting seat, the transmission seat is constrained in a cavity formed in the inner shell, a transmission plate is installed in the cavity of the inner shell through a pin shaft, a supporting spring is located in the cavity of the inner shell, the upper end of the supporting spring is supported on the top wall of the cavity of the inner shell, the lower end of the supporting spring is supported on the transmission seat, and the introducing hole is formed in the bottom of the outer shell. The watchcase structure is convenient to produce and manufacture, and is convenient to assemble all parts in the watchcase.

In order to facilitate the installation of the transmission plate and ensure reasonable layout of all parts, the upper end surface of the inner shell is provided with an installation hole communicated with the cavity of the inner shell, the transmission part extends into the installation hole, and the transmission plate is installed in the installation hole through a pin shaft.

In order to ensure that the transmission seat only slides up and down under the action of external pressure, the hole wall of the mounting hole is provided with a guide groove, and the transmission part is inserted into the guide groove and can slide up and down.

As an improvement, the inner end of the pointer is provided with a supporting piece with a pointed cone-shaped top surface, the upper end of the transmission shaft is inserted in the supporting piece, the inner surface of the upper cover is provided with a conical hole matched with the top surface of the supporting piece, and the supporting piece is inserted in the conical hole. The supporting piece in the shape of a pointed cone has an axial restraining effect on the conical hole, and meanwhile, has a guiding effect on the rotation of the transmission shaft, and the rotating resistance of the pointer is small.

The improved transmission mechanism is characterized in that a sealing gasket made of rubber materials is arranged in the outer shell, the sealing gasket is pressed on the bottom surface of the inner cavity of the outer shell by the inner shell, and the middle of the sealing gasket is fixed below the transmission seat and can move up and down along with the transmission seat. The diaphragm type pressure gauge is formed, the sealing gasket plays a role in pressure conduction, and meanwhile the sealing gasket plays a role in air sealing.

To facilitate connection of the pressure gauge to an associated device, such as an inflator, the lower portion of the housing has a downwardly extending threaded attachment post on which the inlet port is disposed.

Compared with the prior art, the utility model has the advantages of: the conversion structure in the pressure gauge mainly comprises a transmission shaft, a transmission seat and a transmission plate, wherein the transmission seat can move up and down under the combined action of air pressure drive introduced from an introduction hole and a support spring, the transmission seat can drive the transmission plate to swing left and right under the action of a rack part and a gear part, and the transmission plate can swing left and right under the action of a first transmission tooth part and a second transmission tooth part to drive the transmission shaft to rotate around the axis of the transmission plate and finally drive a pointer to rotate; the range of up-and-down movement of the transmission seat is related to the height of introduced air pressure, the range of swing of the transmission plate is related to the range of up-and-down movement of the transmission seat, the range of rotation of the transmission shaft is related to the range of swing of the transmission plate, the range of swing of the pointer is related to the range of rotation of the transmission shaft, and further the range of introduced air pressure is related to the range of swing of the pointer, so that the air pressure can be accurately detected; the whole conversion structure has few related parts and compact layout, so the pressure gauge can be made very small, has strong applicability, can be placed in a valve of a rubber boat or on a handle of a hand-pulling air cylinder for use, and has simple structure of each part, few matching relations and greatly reduced cost.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention;

fig. 2 is a schematic perspective view of an inner shell according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of an embodiment of the present invention;

fig. 4 is a sectional view taken along the direction a-a of fig. 2 according to an embodiment of the present invention;

fig. 5 is an exploded perspective view of an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in FIGS. 1 to 5, it is a preferred embodiment of the present invention.

A pressure gauge comprises a case 1, a dial 2 arranged in the case 1, a pointer 4, and a conversion structure for transmitting pressure deformation to the pointer 4 to cause the pointer 4 to rotate, wherein the dial 2 is provided with pressure scales, and the bottom of the case 1 is provided with an introduction hole 111 for introducing external pressure and acting on the conversion structure.

The utility model has the main improvement point that the conversion structure comprises

The transmission shaft 3 is axially constrained in the watch case 1 and can rotate around the axis of the transmission shaft, a first transmission tooth part 31 is arranged on the outer peripheral wall of the transmission shaft 3, and the upper end of the transmission shaft 3 penetrates through the dial 2 and then is fixed with the pointer 4.

And the transmission seat 5 is arranged in the watch case 1 and can move up and down, the transmission seat 5 is positioned below the transmission shaft 3, and the transmission seat 5 can move up under the driving of air pressure introduced from the introduction hole 111, and a rack part 511 which is vertically arranged is arranged on the transmission seat 5.

And the supporting spring 6 acts on the transmission seat 5 and keeps the transmission seat 5 moving downwards to block the introducing hole 111.

The transmission plate 7 is rotatably arranged in the watchcase 1 and can swing left and right, the upper part of the transmission plate 7 is provided with a second transmission tooth part 711 meshed with the first transmission tooth part 31, so that the transmission plate 7 can drive the transmission shaft 3 to rotate clockwise or anticlockwise around the axis of the transmission plate 7, and the lower part of the transmission plate 7 is provided with a gear part 721 in transmission meshing with the rack part 511, so that the transmission plate 7 can be driven to swing left and right by the up-and-down movement of the transmission seat 5.

The driving plate 7 in this embodiment has a fan-shaped base plate portion and a protruding block portion 72 located below the base plate portion 71 and protruding forward, and the second driving tooth portion 711 is an end face tooth formed on the upper portion of the end face of the base plate portion 71 and arranged in an arc shape; the side surface of the boss portion 72 is arc-shaped, and the teeth of the gear portion 721 are provided on the side surface of the boss portion 72; a transmission part 51 protruding upward from the upper part of the transmission base 5, a rectangular hole 52 penetrating in the front-rear direction is provided on the transmission part 51, a rack part 511 is provided on the inner side wall of the rectangular hole 52, and the gear part 721 is inserted into the rectangular hole 52.

The watch case 1 in this embodiment is composed of an outer case 11, an inner case 12, a mounting base 13, and an upper cover 14 made of a transparent material, the inner case 12 is embedded in the outer case 11, the mounting base 13 is fixed on the top surface of the inner case 12, the transmission shaft 3 is mounted on the mounting base 13, the dial 2 is placed and fixed on the upper end surface of the mounting base 13, the transmission base 5 is constrained in a cavity provided in the inner case 12, the transmission plate 7 is mounted in the cavity of the inner case 12 through a pin 9, the support spring 6 is located in the cavity of the inner case 12, the upper end of the support spring 6 is supported on the top wall of the cavity of the inner case 12, the lower end of the support spring 6 is supported on the transmission base 5, and the introduction hole 111 is.

The upper end surface of the inner shell 12 is provided with a mounting hole 121 communicated with the cavity of the inner shell 12, the transmission part 51 extends into the mounting hole 121, and the transmission plate 7 is mounted in the mounting hole 121 through a pin shaft 9. The hole wall of the mounting hole 121 is provided with a guide groove 122, and the transmission part 51 is inserted into the guide groove 122 and can slide up and down.

The inner end of the pointer 4 is provided with a supporting member 41 with a pointed conical top surface, the upper end of the transmission shaft 3 is inserted into the supporting member 41, the inner surface of the upper cover 14 is provided with a conical hole 141 matched with the top surface of the supporting member 41, and the supporting member 41 is inserted into the conical hole 141.

The inside of the outer shell 11 is provided with a sealing gasket 8 made of rubber, the sealing gasket 8 is pressed on the bottom surface of the inner cavity of the outer shell 11 by the inner shell 12, and the middle part of the sealing gasket 8 is fixed below the transmission seat 5 and can move up and down along with the transmission seat 5. The lower portion of the housing 11 has a screw coupling post 112 extending downward, and the introduction hole 111 is provided on the screw coupling post 112.

All the components in the embodiment can be made of a brittle fracture-proof plastic material.

The working principle and the process of the pressure gauge are as follows:

the conversion structure in this manometer mainly comprises three parts of transmission shaft 3, transmission seat 5 and driving plate 7, and transmission seat 5 can move down under the atmospheric pressure drive and the supporting spring 6 combined action that introduce from introducing hole 111, and atmospheric pressure then drives the distance that transmission seat 5 shifted up the bigger.

The vertical movement of the transmission base 5 by the rack 511 and the gear 721 can drive the transmission plate 7 to swing left and right, and the larger the distance the transmission base 5 moves upward, the larger the amplitude of the swing of the transmission plate 7.

Under the action of the first transmission tooth part 31 and the second transmission tooth part 711, the transmission plate 7 swings left and right to drive the transmission shaft 3 to rotate around the axis of the transmission plate, and finally the pointer 4 is driven to rotate, the larger the swing amplitude of the transmission plate 7 is, the larger the angle of the pointer 4 rotating along with the transmission shaft 3 is, and the displayed scale value is also large.

The air pressure is small, the upward movement distance of the transmission seat 5 is short, the angle for driving the pointer 4 to rotate is small finally, the scale value displayed by the dial 2 is small, other states do not exist, the transmission seat 5 resets under the action of the supporting spring 6, the pointer 4 resets, and the scale value displayed by the dial 2 is zero.

The up-and-down movement amplitude of the transmission seat 5 is related to the height of introduced air pressure, the swinging amplitude of the transmission plate 7 is related to the up-and-down movement amplitude of the transmission seat 5, the rotating amplitude of the transmission shaft 3 is related to the swinging amplitude of the transmission plate 7, the swinging amplitude of the pointer 4 is related to the rotating amplitude of the transmission shaft 3, further the height of the introduced air pressure is related to the swinging amplitude of the pointer 4, the air pressure can be accurately detected, in addition, all the components are in gear transmission connection, the transmission stability is good, the pressure gauge has good anti-seismic effect, and the pressure gauge is not easy to damage even if the pressure gauge falls; the whole conversion structure has few related parts and compact layout, so the pressure gauge can be made very small, has strong applicability, can be placed in a valve of a rubber boat or on a handle of a hand-pulling air cylinder for use, and has simple structure of each part, few matching relations and greatly reduced cost.

It should be noted that in the description of the present embodiment, the terms "front, back", "left, right", "up, down", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for convenience of description of the present invention and simplification of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Claims

1. A pressure gauge comprises a shell (1), a dial (2) arranged in the shell (1), a pointer (4) and a conversion structure for transmitting pressure deformation to the pointer (4) to cause the pointer (4) to rotate, wherein the bottom of the shell (1) is provided with an introduction hole (111) for introducing external pressure and acting on the conversion structure; the method is characterized in that: the conversion structure comprises

The transmission shaft (3) is axially constrained in the watch case (1) and can rotate around the axis of the transmission shaft, a first transmission tooth part (31) is arranged on the outer peripheral wall of the transmission shaft (3), and the upper end of the transmission shaft (3) penetrates through the dial (2) and then is fixed with the pointer (4);

the transmission seat (5) is arranged in the watch case (1) and can move up and down, the transmission seat (5) can move up under the driving of air pressure introduced from the introduction hole (111), and a rack part (511) which is vertically arranged is arranged on the transmission seat (5);

a support spring (6) acting on the transmission seat (5) and keeping the transmission seat (5) moving downwards to block the introduction hole (111);

the transmission plate (7) is rotatably arranged in the watchcase (1) and can swing left and right, a second transmission tooth part (711) meshed with the first transmission tooth part (31) is arranged on the upper part of the transmission plate (7), so that the transmission shaft (3) can be driven to rotate clockwise or anticlockwise around the axis of the transmission plate (7) through the swinging of the transmission plate (7), a gear part (721) in transmission meshing with the rack part (511) is arranged on the lower part of the transmission plate (7), and the transmission plate (7) can be driven to swing left and right through the up-down movement of the transmission seat (5).

2. The pressure gauge according to claim 1, wherein: the transmission plate (7) is provided with a fan-shaped base plate part and a convex block part (72) which is positioned below the base plate part (71) and is convex forwards, and the second transmission tooth part (711) is an end face tooth which is formed at the upper part of the end face of the base plate part (71) and is in an arc-shaped layout; the side surface of the lug part (72) is arc-shaped, and the teeth of the gear part (721) are arranged on the side surface of the lug part (72); the upper portion of transmission seat (5) transmission portion (51) of upwards bellied is equipped with rectangular hole (52) that run through along the fore-and-aft direction on transmission portion (51), rack portion (511) are located on the inside wall of rectangular hole (52), gear portion (721) stretch into in this rectangular hole (52).

3. A pressure gauge according to claim 2, wherein: the watchcase (1) consists of an outer case (11), an inner case (12), a mounting seat (13) and an upper cover (14) made of transparent materials, the inner case (12) is embedded in the outer case (11), the mounting seat (13) is fixed on the top surface of the inner shell (12), the transmission shaft (3) is mounted on the mounting seat (13), the dial (2) is placed and fixed on the upper end surface of the mounting seat (13), the transmission seat (5) is restricted in a concave cavity arranged in the inner shell (12), the transmission plate (7) is arranged in the concave cavity of the inner shell (12) through a pin shaft (9), the supporting spring (6) is positioned in the concave cavity of the inner shell (12), the upper end of the supporting spring (6) is supported on the top wall of the concave cavity of the inner shell (12), the lower end of the supporting spring (6) is supported on the transmission seat (5), and the introducing hole (111) is formed in the bottom of the outer shell (11).

4. A pressure gauge according to claim 3, wherein: the upper end face of the inner shell (12) is provided with a mounting hole (121) communicated with the cavity of the inner shell (12), the transmission part (51) extends into the mounting hole (121), and the transmission plate (7) is mounted in the mounting hole (121) through a pin shaft (9).

5. The pressure gauge according to claim 4, wherein: a guide groove (122) is formed in the hole wall of the mounting hole (121), and the transmission part (51) is inserted into the guide groove (122) and can slide up and down.

6. A pressure gauge according to claim 3, wherein: the inner end of the pointer (4) is provided with a supporting piece (41) with a pointed conical top surface, the upper end of the transmission shaft (3) is inserted into the supporting piece (41), the inner surface of the upper cover (14) is provided with a conical hole (141) matched with the top surface of the supporting piece (41), and the supporting piece (41) is inserted into the conical hole (141).

7. A pressure gauge according to claim 3, wherein: be equipped with sealed pad (8) that the rubber material made in shell (11), this sealed pad (8) are suppressed in the bottom surface of shell (11) inner chamber by inner shell (12), and the middle part of sealed pad (8) is fixed transmission seat (5) below and can reciprocate along with transmission seat (5).

8. A pressure gauge according to claim 3, wherein: the lower part of the outer shell (11) is provided with a downward extending threaded connection column (112), and the introducing hole (111) is arranged on the threaded connection column (112).