Partitioned scale pressure gauge

Abstract

The utility model relates to a partitioned scale pressure gauge. The piston unit is provided with a piston and at least has a low-pressure stroke and a high-pressure stroke according to the change degree of the pressure gas, and a driving piece moves along with the piston; the first elastic element elastically abuts against the piston in the low-pressure stroke and the high-pressure stroke, and the second elastic element only elastically abuts against the piston in the high-pressure stroke; the indicating assembly is provided with a linkage piece and a pointer, the linkage piece is in linkage with the driving piece, the pointer is driven by the linkage piece to move, and in the high-pressure stroke and the low-pressure stroke, the unit pressure moving distance of the driving piece is different, so that the pointer can provide different pressure numerical value guidance in different pressure intervals. And an accurate pressure value can be provided in a low-pressure stroke.

Description

Technical Field

[0001] The utility model relates to an air pumping device, in particular to a zoned scale pressure gauge which can display pressure values ​​of different proportions in high and low pressure intervals. Background Art

[0002] In order to allow the user to determine whether the pressure value during inflation has reached a predetermined pressure value, a conventional air-inflating device has a built-in or external pressure gauge. The pressure gauge has a piston and an elastic element. The piston is pushed and moved by the pressurized gas of the air-inflating device. At the same time, the elastic element generates an elastic force to resist the displacement of the piston, so that the piston is acted upon by the pressurized gas and compresses the elastic element to produce a linear displacement position change. Through this structure, the linear displacement change of the piston is converted into a corresponding pressure value display. For example, the stroke of the piston is converted into the displacement of a rack, and the rack is meshed with a gear, on which a pointer is installed, and the pointer can indicate a pressure value on a scale. As the pressure of the gas changes, the piston can drive the rack to link the gear, so that the gear rotates and drives the pointer to indicate the corresponding pressure value, so that the pressure value of the pressurized gas is converted into an observable value.

[0003] Conventional pressure gauges are usually equipped with only a single elastic element to elastically pressurize the piston. The elastic coefficient of the single elastic element is fixed, so when the piston is acted upon by pressurized gas, its position changes per unit pressure in equal proportion, that is, the piston moves at the same displacement regardless of whether it is in a low-pressure or high-pressure state, so that the rotation amplitude of the gear is also the same; however, users usually require more detailed numerical changes in a low-pressure state, while only rough numerical changes are required in a high-pressure state. Under the design of a single elastic element, only a single specification of indication can be selected. As a result, the display in a low-pressure state may be too rough, or the display range in a high-pressure state may be too large. Displaying a larger range of pressure values ​​will increase the volume of the overall pressure gauge. In order to improve this problem, there is currently a pressure gauge with different areas that can display different pressure values. Two pistons are provided, and a low-pressure elastic element and a high-pressure elastic element are respectively provided on the two pistons. The low-pressure elastic element and the high-pressure elastic element have different elastic coefficients, and the elastic coefficient of the high-pressure elastic element is higher. A low-pressure rack and a high-pressure rack are respectively provided on the two pistons, and the low-pressure rack corresponds to the low-pressure elastic element, and the high-pressure rack corresponds to the high-pressure elastic element. When the gas pressure is low, the low-pressure rack is meshed with a gear. Because the elastic coefficient of the elastic element connected to the low-pressure rack is low, the pushing force under unit pressure is larger. When the gas pressure is high, the low-pressure rack will be separated from the gear and will be in contact with the gear, and the high-pressure rack will be in contact with the gear. Because the high-pressure rack corresponds to the high-pressure elastic element, the moving distance under unit pressure is relatively shorter. Different racks are pushed by elastic elements with different elastic coefficients to produce segmented pressure display; because the low-pressure rack and the high-pressure rack are separated, a larger space is required to install the two pistons and the high-pressure elastic element and the low-pressure elastic element, which increases the volume of the pressure gauge. In addition, because the high-pressure rack and the low-pressure rack are separated, the elastic coefficient between the high-pressure elastic element and the low-pressure elastic element needs to be well adjusted during the stroke displacement to avoid the high-pressure rack and the low-pressure rack from meshing with the gear at the same time, or a gap is formed between the high-pressure rack and the low-pressure rack and cannot rotate. Utility Model Content

[0004] One object of the utility model is to provide a zoned scale pressure gauge, whose piston pushes different numbers of elastic elements in different strokes, so that the piston has different displacements between different pressure strokes, so that the pressure gauge can produce different pressure value displays in different pressure strokes.

[0005] One object of the utility model is to provide a zoned scale pressure gauge, in which the piston drives a driving member to have a larger displacement when under pressure in a low-pressure stroke, and a smaller displacement when under pressure in a high-pressure stroke, so that the indication numbers of the high-pressure stroke and the low-pressure stroke are different, and a zoned scale display is generated.

[0006] One object of the utility model is to provide a zoned scale pressure gauge, which can produce different pressure value indication effects in different pressure strokes through the cooperation of a single driving member and a single connecting member, and the driving member and the connecting member maintain continuous contact without switching errors.

[0007] One purpose of the utility model is to provide a zoned scale pressure gauge, which can make the pressure of the driving member smaller through the smaller elastic coefficient value of the first elastic element, and can produce relatively larger position changes and more accurate pressure indication.

[0008] One object of the utility model is to provide a zoned scale pressure gauge, which can generate indications of different pressure values ​​by only a single piston acting on a plurality of elastic elements, thereby reducing the volume of the pressure gauge.

[0009] To achieve the above purpose, the utility model provides a partitioned scale pressure gauge, comprising:

[0010] A main body, with a space inside, an air inlet at one end of the space; a through groove is arranged on the side of the space;

[0011] A piston unit, comprising a piston and a driving member, wherein the piston is arranged in the space, the air inlet is located at one side of the piston, the piston is displaced in the space by the pressure gas change of the air inlet, and has at least one low-pressure stroke and one high-pressure stroke according to the pressure change degree; the driving member is arranged at one side of the piston and passes through the through groove to the outside of the body, and the driving member moves with the piston on the outside of the body;

[0012] At least one first elastic element and one second elastic element are disposed in the space, the first elastic element elastically abuts against the piston in the low-pressure stroke and the high-pressure stroke; the second elastic element elastically abuts against the piston only in the high-pressure stroke;

[0013] An indicating component comprises a linkage and a pointer. The linkage is linked with the driving member and is driven by the driving member to move. The pointer is connected with the linkage and is driven by the linkage to move.

[0014] By this, when the piston is in contact with the first elastic element only under the low-pressure stroke, the piston only needs to overcome the elastic force of the first elastic element, so that the driving member drives the position of the linkage member to change faster, so that the pointer changes faster, and the relative pressure value is displayed more accurately; after the piston moves to the high-pressure stroke, the piston needs to push the first elastic element and the second elastic element at the same time, and the force increases, so that the displacement of the piston after the force is applied becomes smaller. In the high-pressure stroke, the position change of the linkage member will be relatively slow, and the pointer can indicate a larger range of pressure values ​​when it changes in the same position. The second elastic element does not actuate with the piston in the low-pressure stroke, so that the piston can withstand different elastic force values ​​in different strokes, and can produce a partitioned display effect with at least two different pressure value indications under different pressure conditions, and the pressure value can be accurately displayed in the low-pressure stroke.

[0015] Preferably, the piston is provided with a piston portion and a pushing portion, the piston portion is located on a side having the air inlet, and is pushed to move by the pressure of the air inlet; the pushing portion is connected to one side of the piston portion, and is provided with a first connecting portion and a second connecting portion, one end of the first elastic member is connected to the first connecting portion, and one end of the second elastic member is connected to the second connecting portion; the pushing portion can compress the first elastic element in a low-pressure stroke, and can compress the first elastic element and the second elastic element in a high-pressure stroke, and different elastic forces can be generated by the different contact positions of the pushing portion with the first elastic element and the second elastic element.

[0016] Preferably, the main body is provided with an end cover at the end of the space, the end cover can close the space, and a first adjustment part and a second adjustment part are provided on the end cover; one end of the first elastic element is connected to the first adjustment part, and one end of the second elastic element is connected to the second adjustment part, and the end cover provides support for the first elastic element and the second elastic element.

[0017] Preferably, the linkage forms a rod body, with a connecting end respectively provided at both axial ends; the main body is provided with a protrusion near the through slot, the protrusion is penetrated with a lower through hole, and the connecting end below the linkage is pivotally mounted on the through hole; a cantilever is detachably assembled on the main body, and an upper through hole is provided on the cantilever. When the cantilever is assembled on the main body, the connecting end above the linkage will be pivotally mounted in the upper through hole, and the pointer will be assembled on the upper connecting end, so that the pointer rotates with the linkage, and the linkage can be stably arranged on the side of the main body through the protrusion and the cantilever to ensure the actuating relationship between the linkage and the driving member.

[0018] The partitioned scale pressure gauge provided by the utility model can change the pressure value displayed by the pointer of the indicating component through the different actuating strokes of the first elastic element and the second elastic element. In addition to requiring only a single driving member and a relatively simple linkage structure, the difference in elastic coefficients between the first elastic element and the second elastic element can also increase the display difference between the high-pressure stroke and the low-pressure stroke, and only in the low-pressure stroke of the first elastic element can an accurate pressure value indication be generated. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to further understand the purpose, features and effects of the present invention, three preferred embodiments are described below in detail with reference to the accompanying drawings, wherein:

[0020] Figure 1 This is a three-dimensional appearance diagram of a pressure gauge installed in a pumping device in the first preferred embodiment of the utility model.

[0021] Figure 2 This is a three-dimensional exploded view of a pressure gauge according to a first preferred embodiment of the utility model.

[0022] Figure 3 This is a cross-sectional view of the pressure gauge in the vertical direction of the first preferred embodiment of the utility model.

[0023] Figure 4 It is a top view of the pressure gauge of the utility model, showing the display range of the pointer and the numerical indicator plate.

[0024] Figure 5 for Figure 3 The cross-sectional view along line 5-5 shows that the pressure gauge is in a low pressure state.

[0025] Figure 6 Similar to Figure 5 , indicating that the pressure gauge is in a high pressure state.

[0026] Figure 7 This is a cross-sectional view of a pressure gauge according to a second preferred embodiment of the present utility model.

[0027] Figure 8 This is a top view of a pressure gauge according to a second preferred embodiment of the present invention, showing a pointer and a display range of a numerical indicator plate.

[0028] Fig. 9 It is a cross-sectional view of a pressure gauge according to a third preferred embodiment of the present utility model. DETAILED DESCRIPTION

[0029] See also Figures 1 to 5 As shown, it is a preferred embodiment of a partitioned scale pressure gauge 1 provided by the utility model, comprising:

[0030] A housing 10, one side of which is provided with a connecting pipe 11 connected to an air pump device P, such as an air pump, the connecting pipe 11 can transmit the pressurized gas in the air pump device P to allow the pressurized gas to enter the pressure gauge 1, and the upper part of the body 10 is provided with a chamber 12, the chamber 12 has an open end 121, and a wall surface of the chamber 12 is provided with a through hole 122;

[0031] A pressure relief valve 20 is installed in the chamber 12 of the housing 10, and one end of the pressure relief valve 20 is passed through the through hole 122. A connecting pipe 21 is provided at one end of the pressure relief valve 20. Both ends of the connecting pipe 21 are passed through, and one end is connected to the connecting pipe 11. The connecting pipe 21 can introduce the pressure gas of the connecting pipe 11 into the pressure relief valve 20. When the pressure gas in the connecting pipe 11 exceeds a predetermined pressure, it can be discharged from the pressure relief valve 20. A sheet-shaped support member 22 is vertically protruded upward on the pressure relief valve 20, so that the support member 22 is provided in the chamber 12 of the housing 10, or the support member 22 can be directly protruded in the chamber 12. The pressure relief valve 20 is not the main subject of the utility model, and it is not repeated;

[0032] A body 30 is installed in the chamber 12 of the housing 10 and is arranged on the pressure relief valve 20. The body has a space 31 inside. One end of the space 31 has an air chamber 311. An air inlet 312 is provided on the body 30 and communicates with the air chamber 311. The air inlet 312 is connected to the connecting pipe 21 of the pressure relief valve 20 and can receive the pressurized gas of the connecting pipe 11. The body is provided with a through groove 32 on the side of the space 31 to communicate with the outside. An opening 33 is provided at one end of the space 31; a protrusion 34 is provided near the through slot 32 of the main body 30, and a lower through hole 341 is penetrated by the protrusion 34; a cantilever 35 is detachably assembled on the upper part of the main body 30. In this embodiment, one end of the cantilever 35 is screwed on the main body 30, and the cantilever 35 is provided with an upper through hole 351. When the cantilever 35 is assembled on the main body 30, the upper through hole 351 overlaps with the lower through hole 341.

[0033] A piston unit 40, which has a piston 41 and a driving member 42, the piston 41 is arranged in the space 31, so that the air inlet 312 of the body 30 and the opening 33 are respectively located on both sides of the piston 41, the piston 41 has a piston portion 411 and a push portion 412 connected to each other, the piston portion 411 is arranged on the push portion 412 and closes the air chamber 311, the push portion 412 is connected to one side of the piston portion 411 and is a long sheet structure, which is arranged in the space 31 and can be translated in the space 31, the piston portion 411 The piston 41 can be moved back and forth by the pressure gas of the air inlet 312, so that the piston 41 is displaced in the space 31 by the pressure change of the pressure gas, and there is a low-pressure stroke and a high-pressure stroke according to the pressure change degree. The low-pressure stroke is defined as the stroke of the piston 41 between 0-30psi in this embodiment; the high-pressure stroke is defined as the stroke of the piston 41 between 30-160psi in this embodiment. The pressure range of the high-pressure stroke and the low-pressure stroke can be set according to the demand and is not limited. The pressure higher than the set pressure The gas will be discharged through the pressure relief valve 20; a first connection portion 43 and a second connection portion 44 are provided on the long sheet structure of the push portion 412 and near the end of the opening 33, the first connection portion 43 and the second connection portion 44 are respectively composed of a cylinder, the length of the second connection portion 44 is longer than the first connection portion 43, and the length of the second connection portion 44 is greater than the distance of the low-pressure stroke, and a spacer block 45 is provided between the first connection portion 43 and the second connection portion 44; the driving member 42 is provided on one side of the piston 41, when the piston 41 is assembled on the body 30 When the driving member 42 is in the space 31 of the main body 30, the driving member 42 passes through the through slot 32 and is outside the main body 30. The driving member 42 moves with the piston 41 outside the main body 30. The driving member 42 is composed of a full rack 421 in this embodiment. The outer side of the driving member 42 is full of racks, so that the full rack 421 has a longer operating stroke. When the driving member 42 is arranged outside the main body 30, one end thereof is arranged between the main body 30 and the support member 22, so that the support member 22 can help support the driving member 42 to maintain the moving direction of the driving member 42.

[0034] A first elastic element 50 and a second elastic element 60 are arranged in the space 31 at intervals. In the preferred embodiment, the first elastic element 50 and the second elastic element 60 are both compression springs. The first elastic element 50 is a low-pressure spring, and the second elastic element 60 is a high-pressure spring. The elastic coefficient of the first elastic element is lower than the elastic coefficient of the second elastic element. The length of the first elastic element 50 is longer than that of the second elastic element 60, that is, the length of the second elastic element 60 is approximately less than the length of the first elastic element 50 by a low-pressure stroke. One end of the first elastic element 50 is sleeved on the first connection portion 43 and abuts against the end surface of the push portion 412. A section of the second elastic element 60 is sleeved on the second connection portion 44. In the low-pressure stroke range, because the second elastic element 60 is shorter, the second elastic element 60 cannot maintain an abutting state with the push portion 412; so that the first elastic element 50 can abut against the push portion in both the low-pressure stroke and the high-pressure stroke. 412, and the second elastic element 60 can elastically resist the pushing portion 412 only when the pushing portion 412 moves to the high-pressure stroke; the first elastic element 50 and the second elastic element 60 are separated by the spacing block 45 and can be separated and set without interfering with each other; in addition, the first elastic element 50 and the second elastic element 60 with different elastic coefficients can be selected as needed. If a more accurate indication is required in the low-pressure stroke, the first elastic element 50 with a lower elastic coefficient can be selected; if a larger range of pressure values ​​needs to be indicated with a smaller spacing in the high-pressure stroke, the second elastic element 60 with a higher elastic coefficient can be selected.

[0035] An end cover 70 is provided on the space 31 of the body 30 to close the space 31. One end of the first elastic element 50 and the second elastic element 60 abuts against the end cover 70, so that the first elastic element 50 can generate elastic force in the low-pressure stroke and the high-pressure stroke, and the second elastic element 60 generates elastic force in the high-pressure stroke; two screw holes 71 are provided on the end cover 70, and a first adjustment portion 72 and a second adjustment portion 73 are respectively screwed into the two screw holes 71; the first adjustment portion 72 is screwed into one of the screw holes 71 with a first screw block 721, so that the first adjustment portion 72 can be opposite to the first connection portion 43, and the other end of the first elastic element 50 is sleeved on the first adjustment portion 72, and the end surface of the first elastic element 50 abuts against the first screw block 721; the second adjustment portion 73 is screwed into the second screw block 721 with a second screw The connecting block 731 is screwed into the other screw hole 71, and the second adjusting portion 73 is opposite to the second connecting portion 44, so that the other end of the second elastic element 60 is sleeved on the second adjusting portion 73, and the end surface of the second elastic element 60 is abutted against the second screwing block 731; the first adjusting portion 72 and the second adjusting portion 73 can be fine-tuned in position through the first screwing block 721 and the second screwing block 722, and the elastic force of the first elastic element 50 and the second elastic element 60 can be fine-tuned respectively to ensure that the elastic force of the first elastic element 50 and the second elastic element 60 can correspond to the correct pressure value; a baffle 74 protrudes from the side of the end cover 70, and the baffle 74 will be located in the through groove 32 when the end cover 70 is installed on the main body 30, which can relatively limit the extreme position of the driving member 42.

[0036] An indicating assembly 80 includes a linkage 81, a pointer 82, and a numerical display panel 83. The linkage 81 is a rod, and a gear 811 is disposed at the center thereof to mesh with the full rack 421 of the driving member 42, so that the gear 811 of the linkage 811 is driven by the full rack 421 of the driving member 42 to rotate, and the full rack 421 can drive the gear 811 to move throughout the entire process without switching, thereby ensuring the continuity of the actions between the two. A set of connecting ends 812 are disposed at both ends of the linkage 81, and the two sets of connecting ends 812 are pivotally disposed at the lower portion of the protrusion 34. The numerical indicator plate 83 is covered on the open end 121 of the chamber 12 of the shell 10 between the through hole 341 and the upper through hole 351 of the cantilever 35. The numerical indicator plate 83 is provided with a low-pressure interval 831 relative to the low-pressure stroke, and each grid of the low-pressure interval 831 indicates 10psi; and a high-pressure interval 832 is provided relative to the high-pressure stroke, and each grid of the high-pressure interval 832 indicates 30psi. The pointer 82 is connected to the top of the linkage 81, rotates with the linkage 81, and performs the function of pressure gas guidance on the numerical display plate 83.

[0037] See also Figure 5 As shown, when the connecting pipe 11 is not subjected to the pressurized gas input by the pumping device P, the connecting pipe 11 has no pressurized gas, so there is no pressurized gas in the connecting pipe 21 flowing to the pressure relief valve 20 and the air inlet 312, and the pointer 82 indicates zero on the numerical indicator plate 83.

[0038] See also Figure 5 As shown, when the connecting pipe 11 is subjected to low air pressure (below 30psi) from the inflation device P, the pressurized gas will be transmitted to the air inlet 312 via the connecting pipe 11, and the pressurized gas at the air inlet 312 will be transmitted to the air chamber 311, so that the pressurized gas in the air chamber 311 can push the piston part 411, and the piston part 411 will drive the entire piston 41 to move, and the pushing part 412 of the piston 41 will push the first elastic element 50 for compression. During the low-pressure stroke, the pushing part 412 will only push the first elastic element 50 to move, so that the pressurized gas is easy to move when pushing the first elastic element 50. Therefore, during the low-pressure stroke, the piston 41 is easier to be pushed, so that the driving member 42 moves a larger distance when subjected to unit pressure, and relatively makes the linkage 81 rotate at a larger angle, that is, the pointer 82 can produce a larger change at the same unit pressure in the low-pressure interval 831 of the numerical indicator plate 83, and a more accurate pressure indication can be obtained in the low-pressure interval 831.

[0039] See also Figure 6As shown, when the pressure gas entering the connecting pipe 11 gradually increases and increases to the high pressure stage (above 30 psi), the air inlet 312 of the high-pressure pressure gas will enter the air chamber 311, so that the pressure gas in the air chamber 311 can continue to push the piston 41 to move toward the end cover 70, so that the pushing part 412 can enter the high-pressure stroke. When entering the high-pressure stroke, the pushing part 412 will contact the first elastic element 50 and the second elastic element 60 respectively, so that the pushing part 412 has to overcome the elastic force of the first elastic element 50 and the second elastic element 60. Compared with the low-pressure stroke, only the single elastic force of the first elastic element 50 needs to be overcome; in the high-pressure stroke, the first elastic element 50 and the second elastic element 60 need to be overcome. Under the same unit pressure, the stroke of the push part 412 will be reduced, that is, when subjected to the same unit pressure, the moving distance of the push part 412 in the high-pressure stroke will be smaller than the moving distance in the low-pressure stroke; when the displacement of the piston unit 40 in the high-pressure stroke becomes smaller, the moving stroke relative to the driving member 42 will also become smaller, that is, in the indicating component 80, when the linkage 81 is subjected to the same unit pressure, the rotation angle of the gear 811 will also become smaller, so that the rotation angle of the pointer 82 will also become smaller, which means that the pointer can indicate a larger range of pressure gas in the high-pressure interval 832 of the numerical indicating plate 83 at the same rotation angle as the low-pressure interval 831, so the pressure value in the high-pressure interval 832 will have a larger range but a more approximate indication. In this embodiment, the unit pressure indication range of the high-pressure interval 832 is about 3 times that of the low-pressure interval 831, that is, the range of 1 grid rotation of the low-pressure interval 831 is 10psi, and the range of 1 grid rotation of the high-pressure interval 832 is 30psi.

[0040] When the pressure gas in the connecting pipe 11 is greater than the value of the value indicator plate 83 (e.g., above 160 psi), in addition to the blocking rod 74 of the end cover 70 stopping the driving member 42 from continuing to move and preventing the driving member 42 from being separated from the linkage 81, the excess pressure gas can also be discharged through the pressure relief valve 20 to prevent the internal pressure gas from continuing to rise;

[0041] After the inflation is completed, the pressure gas in the connecting tube 11 will dissipate. In the high-pressure stroke, the elastic force of the first elastic element 50 and the second elastic element 60 will push the push part 412 to move toward the air inlet 312, so that the driving member 42 will drive the linkage 81 to move in the direction of the low pressure gas value; and when the push part 412 reaches the position of the low-pressure stroke, the second elastic element 60 can no longer push the push part 412 to move, and only the first elastic element 50 continues to push the push part 412. Until the bottom of the piston unit 40 contacts the body 30, and at the same time, the driving member 42 will also drive the linkage 81 to rotate to the position where the pointer 82 indicates that the numerical indicator plate 83 has returned to zero, and the first elastic element 50 will also stop on the push part 412, so that the push part 412 has a predetermined pressure when it is not under force.

[0042] See also Figure 7 and 8 As shown, it is a second preferred embodiment of the partition scale pressure gauge provided by the utility model, and its main structure is the same as the previous preferred embodiment, and the same elements are represented by the same symbols and will not be described in detail, wherein;

[0043] In order to produce a multi-segment pressure display, the present embodiment further includes a third elastic element 90, the length of which is shorter than that of the second elastic element 60, and a third connecting portion 46 is provided on the pushing portion 412, the length of which is longer than that of the second connecting portion 44, so that when the piston 41 is subjected to the pressure gas of the air inlet 312, three strokes are formed, namely, a low-pressure stroke (0-30psi), a high-pressure stroke (30-90psi) and an ultra-high-pressure stroke (90-160psi); at the same time, three screw holes 71 are relatively provided on the end cover, and a third adjusting portion 75 is provided in one of the screw holes 71; a third screw block 751 is provided on one side of the third adjusting portion 75, and the third screw block 751 can be screwed into the screw hole 71, so that the third adjustment portion 75 can be opposite to the third connection portion 46, and the third elastic element 90 is arranged between the third adjustment portion 75 and the third connection portion 46; when in the low-pressure stroke and the high-pressure stroke, the pushing portion 412 will not abut against the third elastic member 90, and the pushing portion 412 will not push the third elastic element 90 until it is pushed to the ultra-high pressure stroke by the gas pressure of the air inlet 312, so that the pushing portion 412 is simultaneously affected by the elastic forces of the first elastic element 50, the second elastic element 60 and the third elastic element 90, and has the least stroke distance under the action of unit pressure, so that the ultra-high pressure stroke can display the maximum pressure value within the same indication range; in addition, please refer to Figure 8As shown, a corresponding ultra-high pressure interval 833 is also provided on the numerical indication plate 83, so that a rough indication effect can be formed within the ultra-high pressure range, and more range values ​​can be indicated.

[0044] See also Fig. 9 As shown, the third preferred embodiment of the partition scale pressure gauge provided by the utility model has the same main structure as the previous preferred embodiment, and the same elements are represented by the same symbols and will not be described in detail, wherein;

[0045] The first elastic element 50 and the second elastic element 60 are arranged in different directions of the pushing portion 412. The first elastic element 50 is arranged on the side of the piston 41 close to the air inlet 312 and is a pulling spring. When the pushing portion 412 moves, the first elastic element 50 will generate a pulling elastic restoring force, which is different from the elastic restoring force generated by the second elastic element 60 after being compressed. By means of the structure in which the first elastic element 50 and the second elastic element 60 are respectively arranged on both sides of the pushing portion 412, interference between the first elastic element 50 and the second elastic element 60 can be avoided.

[0046] The partitioned scale pressure gauge of the utility model can form at least two different pressure indication values ​​by pushing the different numbers of elastic elements in sections through the piston. Compared with the conventional multiple pressure display which needs to be provided with different pistons to push different elastic elements and drive the gears through different racks, resulting in increased volume and difficulty in matching the racks, the driving member and the connecting member of the utility model can be driven by a single piston, which is simple to manufacture and can ensure the continuity of the action between the driving member and the connecting member. Different elastic forces are subjected to different strokes, so that the numerical display of different pressure intervals can have a more obvious difference display, and in the low-pressure stroke position, it can have a more accurate numerical display effect. At the same time, the setting of a single driving member can also reduce the volume of the pressure gauge.

[0047] The above embodiments are only for explaining the technical scheme of the utility model and are not limiting. Any equivalent modification of the utility model shall be deemed as the protection scope of the utility model. The partition scale pressure gauge of the utility model is the first structure in this field and has improved practical effects, so the application is filed in accordance with the law.

Claims

1. A zoned scale pressure gauge, characterized in that: Include: A main body, with a space inside, an air inlet at one end of the space; a through groove is arranged on the side of the space; A piston unit, comprising a piston and a driving member, wherein the piston is arranged in the space, the air inlet is located at one side of the piston, the piston is displaced in the space by the pressure gas change of the air inlet, and has at least one low-pressure stroke and one high-pressure stroke according to the pressure change degree; the driving member is arranged at one side of the piston and passes through the through groove to the outside of the body, and the driving member moves with the piston on the outside of the body; At least one first elastic element and one second elastic element are disposed in the space, the first elastic element elastically abuts against the piston in the low-pressure stroke and the high-pressure stroke; the second elastic element elastically abuts against the piston only in the high-pressure stroke; An indicating component comprises a linkage and a pointer. The linkage is linked with the driving member and is driven by the driving member to move. The pointer is connected with the linkage and is driven by the linkage to move.

2. The zoned scale pressure gauge according to claim 1, characterized in that: The piston is provided with a piston portion and a pushing portion, the piston portion is located on a side with the air inlet, and is pushed to move by the pressure of the air inlet; the pushing portion is connected to one side of the piston portion, and is provided with a first connecting portion and a second connecting portion, one end of the first elastic element is connected to the first connecting portion, and one end of the second elastic element is connected to the second connecting portion; the pushing portion can compress the first elastic element in a low-pressure stroke, and can compress the first elastic element and the second elastic element in a high-pressure stroke.

3. The zoned scale pressure gauge according to claim 2, characterized in that: The second connection portion has a length greater than that of the first connection portion, and the length of the second connection portion is greater than the distance of the low-pressure stroke.

4. The zoned scale pressure gauge according to any one of claims 1 to 3, characterized in that: The main body is provided with an end cover at the end of the space, the end cover can close the space, and a first adjustment part and a second adjustment part are provided on the end cover; one end of the first elastic element is connected to the first adjustment part, and one end of the second elastic element is connected to the second adjustment part.

5. The zoned scale pressure gauge according to claim 4, characterized in that: The first adjustment portion and the second adjustment portion can adjust their positions on the end cover to adjust the elastic force value of the first elastic element and / or the second elastic element.

6. The zoned scale pressure gauge according to claim 4, characterized in that: A shift rod protrudes from the end cover and is arranged in the through slot so that the travel of the driving member can be limited by the shift rod.

7. The zoned scale pressure gauge according to claim 1, characterized in that: The driving member has a full rack, and the linkage member is provided with a gear meshing with the full rack.

8. The zoned scale pressure gauge according to claim 1 or 7, characterized in that: The linkage is formed into a rod body, with a connecting end provided at each of the two axial ends; the main body is provided with a protrusion near the through slot, the protrusion is penetrated with a lower through hole, and the connecting end below the linkage is pivotally arranged on the through hole; a cantilever is detachably assembled on the main body, and an upper through hole is provided on the cantilever. When the cantilever is assembled on the main body, the connecting end above the linkage will be pivotally arranged in the upper through hole, and the pointer will be assembled on the upper connecting end, so that the pointer rotates with the linkage.

9. The zoned scale pressure gauge according to claim 1 or 7, characterized in that: It further comprises: a supporting member, which is arranged near the through slot and keeps a distance from the main body, and the driving member is located between the main body and the supporting member.

10. The zoned scale pressure gauge according to claim 1, characterized in that: The first elastic element and the second elastic element are arranged at a distance and are located on the same side of the piston. A spacing block is arranged on the piston, and the spacing block separates the first elastic element from the second elastic element.

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