CN209894393U

CN209894393U - Mechanical digital display pressure gauge

Info

Publication number: CN209894393U
Application number: CN201920256439.9U
Authority: CN
Inventors: 施小峰; 施启高
Original assignee: Dongtai Shunda Ship Plastic Leather Factory
Current assignee: Dongtai Shunda Ship Plastic Leather Factory
Priority date: 2019-02-28
Filing date: 2019-02-28
Publication date: 2020-01-03
Anticipated expiration: 2029-02-28

Abstract

The utility model discloses a mechanical type digital display manometer, which comprises a housing, the table lid, set up bourdon tube and rotatable dabber in the watchcase, fan gear and the dabber gear of connecting bourdon tube and dabber, at dabber fixed connection pointer, the fixed disk that is provided with at the dabber top, this disk top is adjacent to be set up the angle inductor, this angle inductor is connected with circuit board electricity, this circuit board is connected with the digital display screen electricity, the dabber gear is installed at the dabber one end relative with the disk, this dabber gear sets up in the epaxial fixed thin gear of dabber and the rotatable movable thin gear that sets up in dabber including the fixed thin gear that has the same gear parameter, be connected with the spring between fixed thin gear and movable thin gear, the thickness of fixed thin gear and movable thin gear with the thickness that corresponds to fan gear. Adopt the utility model discloses a mechanical type digital display manometer can not only carry out digital display to the pressure value, and pressure display is accurate, sensitive moreover.

Description

Mechanical digital display pressure gauge

Technical Field

The utility model relates to a pressure instrument especially relates to a mechanical type manometer's improvement with digital display.

Background

The pressure gauge is a meter which takes an elastic element as a sensitive element and measures and indicates the pressure higher than the ambient pressure, and the application of the pressure gauge is very common and almost extends to all the fields of industrial processes and scientific researches. The manometer is as a pressure measurement instrument, its detection precision is significant to the normal clear of production and scientific research work, the manometer indicates the pressure of measurand medium through the pointer indirectly through the deformation that pressure deformation switching mechanism produced elastic element in the testing process usually, because the pressure value that the pointer instructed is not convenient for accurate reading, in order to the pressure indicating value that the accurate demonstration detected, electronic display formula manometer has appeared, the utility model discloses a mechanical type manometer is disclosed to open (bulletin) CN103712727A utility model digital display, it is fixed at the dabber top and is provided with the disk, the adjacent angle inductor that is setting up in this disk top, this angle inductor is connected with the circuit board electricity, this circuit board is connected with the digital display screen electricity, thereby can in time demonstrate concrete pressure value through the digital display screen directly perceived, high convenience is used. However, since the pressure deformation conversion mechanism between the elastic element and the pointer is a transmission mechanism between the elastic element and the pointer, the transmission mechanism comprises a sector gear connected with an elastic element and a mandrel gear connected with the pointer through a mandrel, the sector gear and the mandrel gear which are meshed with each other inevitably have abrasion after working for a period of time, and the backlash between the sector gear and the gear is enlarged after abrasion, which causes slow response of the pointer, error of indicating value and inaccurate digital display, particularly, when the pressure fluctuates, the mandrel gear can not timely rotate back and forth along with the sector gear, so that the pointer can not normally display the pressure fluctuation condition, meanwhile, the magnetic disk fixedly arranged at the top of the mandrel is slow in action, the corresponding angle sensor cannot sense the angle change of the mandrel in time, and the accuracy of the pressure value displayed on the digital display screen cannot be guaranteed.

SUMMERY OF THE UTILITY MODEL

The above-mentioned not enough to prior art exists, the utility model aims to solve the technical problem that a mechanical type digital display manometer is provided, it can not only carry out digital display to the pressure value, and pressure display is accurate, sensitive moreover.

In order to solve the technical problem, the utility model discloses a mechanical type digital display manometer, including watchcase, table lid, set up bourdon tube and rotatable dabber in the watchcase, connect the sector gear and the dabber gear of bourdon tube and dabber, at dabber fixed connection the pointer, the fixed disk that is provided with in dabber top, the adjacent angle inductor that is setting up in this disk top, this angle inductor is connected with the circuit board electricity, this circuit board is connected with digital display screen electricity, this circuit board is supplied power by the battery, the dabber gear is installed in the dabber one end relative with the disk, this dabber gear includes fixed thin gear and the rotatable movable thin gear that sets up in the spindle that sets up in dabber fixedly, fixed thin gear and movable thin gear have the same gear parameter, are connected with the spring between fixed thin gear and movable thin gear, fixed thin gear, The movable thin gears are all meshed with the sector gears, and the sum of the thicknesses of the fixed thin gears and the movable thin gears corresponds to the thickness of the sector gears.

In the above structure, since the spindle gear is mounted on the spindle at the end opposite to the disk, the spindle gear includes a fixed thin gear fixedly mounted on the spindle and a movable thin gear rotatably mounted on the spindle, the fixed thin gear and the movable thin gear have the same gear parameters, a spring is connected between the fixed thin gear and the movable thin gear, both the fixed thin gear and the movable thin gear are engaged with the sector gear, the sum of the thicknesses of the fixed thin gear and the movable thin gear corresponds to the thickness of the sector gear, the spindle gear formed by combining the fixed thin gear and the movable thin gear is engaged with the sector gear, the movable thin gear rotates relative to the fixed thin gear under the action of the spring force, so that one side of the gear teeth engaged in the tooth grooves of the sector gear on the spindle gear is a tooth side of the fixed thin gear, and the other side of the gear teeth is a tooth side of the movable thin gear, the acting force of the spring keeps a backlash-free meshing state between the mandrel gear and the sector gear, and no matter how much abrasion is generated between the sector gear and the mandrel gear due to overlong working time, as long as the spring force exists, and the spring force can be larger than the resistance of the movement of the mandrel and the pointer, the backlash-free meshing state can be kept, and the precise synchronous corresponding rotation between the mandrel and the sector gear can be ensured, even under the condition that the measured pressure fluctuates frequently, the pointer can correspondingly and accurately indicate the corresponding measured pressure value, the magnetic disc positioned at the top end of the mandrel can also rotate along with the mandrel sensitively, and the angle sensor can timely and accurately sense to enable the digital display screen to accurately and sensitively display the precise measured pressure value.

The utility model discloses a preferred embodiment, the spring is the disc spring, and this disc spring's one end is connected on fixed thin gear, and this disc spring's the other end is connected on the thin gear of activity. By adopting the embodiment, two ends of the disk spring are respectively connected to the fixed thin gear and the movable thin gear, so that the movable thin gear can be conveniently driven to rotate relative to the fixed thin gear, and the gapless meshing between the mandrel gear and the sector gear is ensured.

The utility model discloses a another kind of preferred embodiment the one end relative with fixed thin gear on the thin gear of activity is equipped with the step hole the one end relative with the thin gear of activity on the fixed thin gear is equipped with the boss, and the boss is pegged graft in the step hole, is equipped with the draw-in groove on boss periphery and step hole pore wall respectively, disc spring installs in the annular space between step hole and the boss, and disc spring's both ends are pegged graft respectively in the draw-in groove of establishing on boss periphery and step hole pore wall. By adopting the embodiment, the connection structure between the disc spring and the fixed thin gear and between the disc spring and the movable thin gear is simple, the installation is convenient, and the disc spring is arranged in the annular space between the movable thin gear and the fixed thin gear, so that the working environment is good.

In another preferred embodiment of the present invention, the spring is a torsion spring, one end of the torsion spring is connected to the fixed thin gear, and the other end of the torsion spring is connected to the movable thin gear. By adopting the embodiment, two ends of the torsion spring are respectively connected to the fixed thin gear and the movable thin gear, so that the movable thin gear can be conveniently driven to rotate relative to the fixed thin gear, and the gapless meshing between the mandrel gear and the sector gear is ensured.

The utility model discloses a further preferred embodiment one end is equipped with respectively on the thin gear of activity and the fixed thin gear with the coaxial torsional spring mounting hole of dabber, the torsional spring mounting hole of the thin gear of activity sets up with the torsional spring mounting hole on the fixed thin gear relatively, the torsional spring is installed in the torsional spring mounting hole on the thin gear of activity and the fixed thin gear, and the joint inslot on the thin gear of activity and the fixed thin gear torsional spring mounting hole pore wall is inserted to the both ends difference card of torsional spring. By adopting the embodiment, the connecting structure between the torsion spring and the fixed thin gear and between the torsion spring and the movable thin gear is simple, the installation is convenient, and the torsion spring is installed in the torsion spring installing holes of the movable thin gear and the fixed thin gear, so that the working environment is good.

In another preferred embodiment of the present invention, the sector gear is connected to the lever of the bourdon tube. By adopting the embodiment, the deformation generated in the working process of the Bourdon tube can make the sector gear generate a proper rotating angle by using the lever structure, so that the elastic deformation generated by the Bourdon tube is accurately transformed into the change of the rotating angle of the sector gear, and the detection precision of the pressure gauge is further ensured.

Drawings

The mechanical digital display pressure gauge of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of a specific embodiment of the mechanical digital display pressure gauge of the present invention;

FIG. 2 is a right side view of the structure shown in FIG. 1;

FIG. 3 is a left side view of the structure of FIG. 1 with the watch case removed;

FIG. 4 is an enlarged schematic view of the arrangement between the sector gear and the spindle gear of the arrangement shown in FIG. 3;

FIG. 5 is a cross-sectional view taken at location A-A of the structure shown in FIG. 4;

fig. 6 is an enlarged view of a portion I in the structure shown in fig. 4.

In the figure: 1-digital display screen, 2-circuit board, 3-angle sensor, 4-magnetic disk, 5-pointer, 6-battery, 7-Bourdon tube, 8-watchcase, 9-sector gear, 10-, 11-core shaft, 12-watch cover, 13-core shaft gear, 131-movable thin gear, 132-fixed thin gear, 14-spring, 15-boss, 16-step hole and 17-card slot.

Detailed Description

In the mechanical digital display pressure gauge shown in fig. 1, 2 and 3, a rotatable spindle 11 and a bourdon tube 7 are arranged in a case 8, a gear 13 is fixedly connected to the inner end of the spindle 11, the gear 13 is engaged with a sector gear 9 rotatably arranged in the case 8, the sector gear 9 is lever-connected with the free end of the bourdon tube 7, the other end of the bourdon tube 7 is communicated with a joint 10 and is hermetically and fixedly connected, a pointer 5 is fixedly connected to the spindle 11, the pointer 5 and the gear 13 are respectively arranged at both ends of the spindle 11, a magnetic disk 4 is fixedly arranged at the top end of the spindle 11, the magnetic disk 4 is arranged at the end opposite to the spindle gear 13, an angle sensor 3 is adjacently arranged above the magnetic disk 4, a circuit board 2 is arranged between the case 8 and a cover 12, a digital display 1 is arranged on the cover 12, the digital display 1 is electrically connected with the circuit board 2, the circuit board 2 is electrically connected with the angle sensor 3, this circuit board 2 is supplied power by battery 6, battery 6 seals and sets up in 8 bottoms on the watchcase, and Bourdon tube 7 produces deformation under the effect of being measured the pressure in the course of the work, and drive dabber 11 through lever mechanism and sector gear 9, gear 13 and rotate, make pointer 5 can instruct corresponding pressure value, still make angle inductor 3 sense the magnetic line of force angle change of disk 4 and produce corresponding signal of telecommunication and convert pressure numerical value to through circuit conversion of circuit board 2, and then show through digital display screen 1. As shown in fig. 4, 5 and 6, the mandrel gear 13 includes a fixed thin gear 132 fixedly disposed on the mandrel 11 and a movable thin gear 131 rotatably disposed on the mandrel 11, the end surfaces of the fixed thin gear 132 and the movable thin gear 131 are kept in a state of being attached to each other by a shoulder and a snap spring at the end of the mandrel 11, the fixed thin gear 132 and the movable thin gear 131 have the same gear parameters, a spring 14 is connected between the fixed thin gear 132 and the movable thin gear 131, both the fixed thin gear 132 and the movable thin gear 131 are engaged with the sector gear 9, and the sum of the thicknesses of the fixed thin gear 132 and the movable thin gear 131 corresponds to the thickness of the sector gear 9. Preferably, the spring 14 is a disk spring, one end of the movable thin gear 131 opposite to the fixed thin gear 132 is provided with a step hole 16, the step hole 16 and the mounting hole of the movable thin gear 131 are coaxially arranged to form a step hole in the inner hole of the movable thin gear 131, one end of the fixed thin gear 132 opposite to the movable thin gear 131 is provided with a boss 15, the boss 15 is inserted into the step hole 16, the periphery of the boss 15 and the wall of the step hole 16 are respectively provided with a clamping groove 17, the disk spring is mounted in an annular space between the step hole 16 and the boss 15, two ends of the disk spring are respectively inserted into the clamping grooves 17 arranged on the periphery of the boss 15 and the wall of the step hole 16, so that one end of the disk spring is connected to the fixed thin gear 132, and the other end of the disk spring is connected to the movable thin gear 131. The mandrel gear 13 formed by combining the fixed thin gear 132, the movable thin gear 131 and the spring 14 is meshed with the sector gear 9, so that backlash-free meshing is kept between the mandrel gear 13 and the sector gear 9, and accurate and sensitive pressure display is guaranteed.

The above description has been presented only for the purpose of illustrating certain preferred embodiments of the invention, and it is not to be taken as a limitation on the invention, as many modifications and variations are possible. As described above, the spring 14 may be not a disc spring but a torsion spring, one end of which is connected to the fixed thin gear 132 and the other end of which is connected to the movable thin gear 131; correspondingly, the end of the fixed thin gear 132 opposite to the movable thin gear 131 may not be provided with the boss 15, but one end of the movable thin gear 131 and one end of the fixed thin gear 132 may be respectively provided with a torsion spring mounting hole coaxial with the core shaft 11, the torsion spring mounting hole of the movable thin gear 131 and the torsion spring mounting hole of the fixed thin gear 132 are oppositely arranged, the torsion springs are mounted in the torsion spring mounting holes of the movable thin gear 131 and the fixed thin gear 132, the inner holes of the torsion springs are sleeved on the core shaft 11, and two ends of the torsion springs are respectively inserted into the clamping grooves on the wall of the torsion spring mounting holes of the movable thin gear 131 and the fixed thin gear 132, so that the movable thin gear 131 can be conveniently driven to rotate relative to the fixed thin gear 132 through the torsion springs, thereby enabling the core shaft gear 13 and the sector gear 9 to be engaged without a gap, and ensuring accurate and sensitive pressure. Therefore, any improvement and changes made on the basis of the basic principle of the present invention should be considered as falling within the protection scope of the present invention.

Claims

1. The utility model provides a mechanical type digital display manometer, includes watchcase (8), table lid (12), sets up bourdon tube (7) and rotatable dabber (11) in watchcase (8), connects sector gear (9) and dabber gear (13) of bourdon tube (7) and dabber (11), and fixed connection pointer (5) on dabber (11), fixed disk (4) that is provided with in dabber (11) top, this disk (4) top is adjacent to be provided with angle inductor (3), and this angle inductor (3) are connected with circuit board (2) electricity, and this circuit board (2) are connected with digital display screen (1) electricity, and this circuit board (2) are supplied power by battery (6), its characterized in that: the magnetic disk drive is characterized in that the mandrel gear (13) is arranged at one end, opposite to the magnetic disk (4), of the mandrel (11), the mandrel gear (13) comprises a fixed thin gear (132) fixedly arranged on the mandrel (11) and a movable thin gear (131) rotatably arranged on the mandrel (11), the fixed thin gear (132) and the movable thin gear (131) have the same gear parameters, a spring (14) is connected between the fixed thin gear (132) and the movable thin gear (131), the fixed thin gear (132) and the movable thin gear (131) are meshed with the sector gear (9), and the sum of the thicknesses of the fixed thin gear (132) and the movable thin gear (131) corresponds to the thickness of the sector gear (9).

2. The mechanical digital display pressure gauge according to claim 1, wherein: the spring (14) is a disc spring, one end of the disc spring is connected to the fixed thin gear (132), and the other end of the disc spring is connected to the movable thin gear (131).

3. The mechanical digital display pressure gauge according to claim 2, wherein: a step hole (16) is formed in one end, opposite to the fixed thin gear (132), of the movable thin gear (131), a boss (15) is arranged at one end, opposite to the movable thin gear (131), of the fixed thin gear (132), the boss (15) is inserted into the step hole (16), clamping grooves (17) are formed in the periphery of the boss (15) and the hole wall of the step hole (16) respectively, the disc spring is installed in an annular space between the step hole (16) and the boss (15), and two ends of the disc spring are inserted into the clamping grooves (17) formed in the periphery of the boss (15) and the hole wall of the step hole (16) respectively.

4. The mechanical digital display pressure gauge according to claim 1, wherein: the spring (14) is a torsion spring, one end of the torsion spring is connected to the fixed thin gear (132), and the other end of the torsion spring is connected to the movable thin gear (131).

5. The mechanical digital display pressure gauge according to claim 4, wherein: one end is equipped with respectively on activity thin gear (131) and the fixed thin gear (132) with the coaxial torsional spring mounting hole of dabber (11), the torsional spring mounting hole of activity thin gear (131) sets up with the torsional spring mounting hole on the fixed thin gear (132) relatively, the torsional spring is installed in the torsional spring mounting hole on activity thin gear (131) and fixed thin gear (132), and the joint inslot on activity thin gear (131) and fixed thin gear (132) torsional spring mounting hole pore wall is inserted in the card respectively at the both ends of torsional spring.

6. The mechanical digital display pressure gauge according to claim 1, wherein: the sector gear (9) is in lever connection with the Bourdon tube (7).