Rotating disc type square shell pressure gauge

Abstract

The utility model provides a rotating disc type square shell pressure gauge which comprises a rear cover, a copper seat is fixed in the rear cover, a movement is fixed on the copper seat, the movement is rotatably connected with a movement shaft, and the movement shaft is fixedly connected with a rotating disc. An arc-shaped window is arranged on the side surface of the rear cover, and the reading of the turntable can be read from the arc-shaped window; the copper seat comprises a first interface and a second interface, the first interface and the second interface are respectively located at two sides of the copper seat, and the first interface is communicated with the second interface; the movement comprises a connecting rod, one end of the bourdon tube is fixedly connected with the first interface, the other end of the bourdon tube is fixedly connected with the connecting rod, the connecting rod is connected with a sector gear, one end of the sector gear is fixedly connected with the connecting rod, and the other end of the sector gear is a sector tooth surface; a rotating shaft is arranged in the middle of the sector gear, and the sector gear can rotate around the rotating shaft; the tooth surface of the sector gear is matched with a gear fixed on the machine core shaft; the second interface is connected with a measuring tube which is communicated with the outside of the pressure gauge.

Description

Technical Field

[0001] The utility model belongs to the field of instruments, and particularly relates to a rotary square shell pressure gauge. Background Art

[0002] Common pressure gauges are generally pointer type, with a circular dial. When installed, the entire dial must be exposed, occupying a large space and not being suitable for narrow and compact spaces. While square pressure gauges can fit more tightly with parts and are suitable for narrow and compact spaces.

[0003] There is a rectangular diaphragm pressure gauge on the market. This pressure gauge has a square shell but is still pointer type, and the reading is obtained by the rotation of the pointer during measurement. When designing and manufacturing, the side for reading the scale of the rectangular diaphragm pressure gauge must expose the entire range, making the overall volume of the pressure gauge relatively large. Content of the Utility Model

[0004] To solve the above problems, the utility model provides a rotary square shell pressure gauge.

[0005] The purpose of the utility model is achieved in the following way:

[0006] A rotary square shell pressure gauge includes a rear cover 1. A copper seat 2 is fixed inside the rear cover 1. A movement 3 is fixed on the copper seat 2. The movement 3 is rotatably connected to a movement shaft 33, and the movement shaft 33 is fixedly connected to a turntable 4. An arc-shaped window 11 is arranged on the side of the rear cover 1, and the reading of the turntable 4 can be read from the arc-shaped window 11. The copper seat 2 includes a first interface 21 and a second interface 22. The first interface 21 and the second interface 22 are respectively located on both sides of the copper seat 2, and the middle of the first interface 21 and the second interface 22 is connected. It further includes a bourdon tube 41. The movement 3 includes a connecting rod 31. One end of the bourdon tube 41 is fixedly connected to the first interface 21, and the other end is fixedly connected to the connecting rod 31. The connecting rod 31 is connected to a sector gear 32. One end of the sector gear 32 is fixedly connected to the connecting rod 31, and the other end is a sector tooth surface. A rotating shaft 32 is arranged in the middle of the sector gear. The sector gear can rotate around the rotating shaft 32. The tooth surface of the sector gear 32 cooperates with the gear fixed on the movement shaft 33. The second interface 22 is connected to a measuring tube 5, and the measuring tube 5 is communicated with the outside of the pressure gauge.

[0007] In the described rotary square shell pressure gauge, a nylon shaft 42 is arranged between the movement shaft 33 and the turntable 4. The movement shaft 33 is inserted into the shaft hole of the nylon shaft 42, and the inserted part is elliptical, and the widest part of the ellipse is larger than the inner diameter of the shaft hole of the nylon shaft 42.

[0008] In the described rotary square shell pressure gauge, two support columns 34 for supporting the movement 3 are arranged on the rear cover 1, and corresponding support holes are arranged on the movement 3.

[0009] The described rotary square-case pressure gauge, the copper seat 2 includes a mounting hole 23 which is provided with internal threads. One side of the mounting hole 23 is used to fix the copper seat on the rear cover in cooperation with a screw, and the other side is used to fix and install the movement on the copper seat in cooperation with a screw; the screw on the side fixed to the rear cover is screwed into the mounting hole outside the rear cover, and the screw counterbore is installed into the rear cover.

[0010] The described rotary square-case pressure gauge, a limit sleeve 322 is arranged on the rotating shaft 321.

[0011] The described rotary square-case pressure gauge, the measuring tube 5 is connected to the capillary hose 51.

[0012] Compared with the prior art, the present utility model uses a rotary square-case pressure gauge. The square case enables this pressure gauge to adapt to a compact space, and the rotary reading makes it unnecessary to expose the entire range on the reading side, reducing the volume of the pressure gauge. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 One of the sectional views of the present utility model;

[0014] Figure 2 Another sectional view of the present utility model;

[0015] Figure 3 A perspective view of the rear cover;

[0016] Figure 4 A schematic view of the inner side perspective of the rear cover;

[0017] Figure 5 A schematic view of the outer side perspective of the rear cover;

[0018] Figure 6 For Figure 5 A sectional view in the C-C direction;

[0019] Figure 7 A side view of the movement structure;

[0020] Figure 8 A top view of the movement structure;

[0021] Figure 9 A schematic view of the copper seat;

[0022] Figure 10 A lateral sectional view of the nylon shaft;

[0023] Figure 11 A top view of the nylon shaft.

[0024] Among them, 1 back cover, 11 arc-shaped window, 12 watch case, 2 copper base, 21 first interface, 22 second interface, 23 mounting hole, 231 movement fixing hole, 232 chamfered hole, 3 movement, 31 connecting rod, 311 hairspring, 32 sector gear, 321 rotating shaft, 322 limit sleeve, 33 movement shaft, 34 support column, 4 turntable, 41 bourdon tube, 42 nylon shaft, 5 measuring tube, 51 capillary hose. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] In the present invention, unless otherwise clearly defined and limited, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention.

[0027] As Figures 1-11 shown, a rotary square case pressure gauge, the back cover 1 is internally fixed with a copper base 2, the copper base 2 is fixed with a movement 3, the movement 3 is rotatably connected to a movement shaft 33, and the movement shaft 33 is fixedly connected to a turntable 4; an arc-shaped window 11 is provided on the side of the back cover 1, and the reading of the turntable 4 can be read from the arc-shaped window 11; the copper base 2 includes a first interface 21 and a second interface 22, the first interface 21 and the second interface 22 are respectively located on both sides of the copper base 2, and the first interface 21 and the second interface 22 are connected in the middle; it further includes a bourdon tube 41, the movement 3 includes a connecting rod 31, one end of the bourdon tube 41 is fixedly connected to the first interface 21, one end is fixedly connected to the connecting rod 31, the connecting rod 31 is connected to a sector gear 32, one end of the sector gear 32 is fixedly connected to the connecting rod 31, and the other end is a sector tooth surface; a rotating shaft 32 is provided in the middle of the sector gear, and the sector gear can rotate around the rotating shaft 32; the tooth surface of the sector gear 32 cooperates with the gear fixed on the movement shaft 33; the second interface 22 is connected to a measuring tube 5, and the measuring tube 5 communicates with the outside of the pressure gauge.

[0028] The measuring tube 5 is connected to the bourdon tube 41. When the pressure in the measuring area changes, this pressure change can be transmitted to the bourdon tube through the measuring tube. When the pressure inside the bourdon tube changes, the bourdon tube deforms, driving the connecting rod to move, and the connecting rod drives the sector gear to rotate. The sector gear drives the movement of the core shaft, which in turn causes the turntable to rotate. The reading of the turntable is read from the arc-shaped window, thus completing the measurement of the pressure. The rear cover is approximately a cuboid lacking one face. The lack of a face facilitates the installation of internal components. After the rear cover 1 is engaged with the watch case 12, the missing face is filled, approximating a complete cuboid. The engagement between the rear cover and the watch case is prior art and will not be elaborated here.

[0029] At the connection between the bourdon tube and the first interface, the connection between the bourdon tube and the connecting rod, and the connection between the measuring tube and the second interface, welding is used for fixation and sealing.

[0030] A hairspring 311 can be provided inside the movement. The function of the hairspring is to keep the gears in one-way engagement during transmission, eliminating the transmission dead space that may be generated by the backlash when the gears rotate in different directions, thereby reducing the error of the movement. The hairspring 311 is prior art and will not be elaborated here.

[0031] As Figures 10-11 shown, in the described rotary square-case pressure gauge, a nylon shaft 42 is provided between the movement shaft 33 and the turntable 4. The movement shaft 33 is inserted into the shaft hole of the nylon shaft 42, and the inserted part is elliptical. The widest part of the ellipse is larger than the inner diameter of the shaft hole of the nylon shaft 42. Since the turntable has a large mass and inertia, slipping may occur when the movement shaft drives the turntable to rotate. Therefore, a nylon shaft 42 is provided between the movement shaft 33 and the turntable 4. The material of the movement shaft is brass. After being flattened into an ellipse, it is pressed into the inner hole of the nylon shaft. Since the nylon shaft has a certain elasticity, the flattened movement shaft entering the shaft hole of the nylon shaft deforms the shaft hole of the nylon shaft from circular to elliptical. Compared with a circle, the ellipse can prevent rotation and slipping. The movement shaft and the nylon shaft are in interference fit, and the nylon shaft and the turntable are in interference fit to drive the turntable to rotate. An adjustment groove for calibration is provided at the top of the nylon shaft.

[0032] In the described rotary square-case pressure gauge, two support columns 34 for supporting the movement 3 are provided on the rear cover 1, and corresponding support holes 35 are provided on the movement 3. To reduce the overall volume of the pressure gauge, the copper seat can be made smaller, but this will result in a smaller installation surface between the movement and the copper seat, making the movement unstable and possibly skewed. Therefore, support columns 34 are provided on the rear cover 1, and corresponding support holes are provided on the movement. The support columns extend into the support holes to support and fix the movement.

[0033] The described rotary square-case pressure gauge, the copper seat 2 includes a mounting hole 23, the mounting hole 23 is provided with internal threads. One side of the mounting hole 23 is used to fix the copper seat on the rear cover by cooperating with a screw, and the other side is used to fix the movement on the copper seat by cooperating with a screw. The screw on the side fixed to the rear cover is screwed into the mounting hole outside the rear cover, and the screw counterbore is installed in the rear cover. The counterbore installation can make the rear surface smooth without protrusions after connection, and is more suitable for a compact and narrow installation space. The specific method is to open a "chamfer" on the outer surface of the rear cover that can accommodate the screw cap, so that the screw cap can be flush with the rear cover surface after the screw is drilled, so that the head of the screw is not higher than the surrounding surface.

[0034] A movement fixing hole 231 corresponding to the mounting hole is provided on the movement, and a chamfer hole 232 corresponding to the mounting hole is provided on the rear cover.

[0035] The described rotary square-case pressure gauge, the sector gear 32 rotates around the rotating shaft 321, and a limit sleeve 322 is provided on the rotating shaft 321. The turntable shakes greatly during transportation or use. By providing a limit sleeve 322 on the rotating shaft 321, the shaking of the sector gear is restricted. The sector gear meshes with the movement shaft through gears, and the movement shaft is fixedly connected to the turntable, which can achieve the effect of restricting the shaking of the turntable. The limit sleeve 322 is a soft sleeve sleeved on the rotating shaft 321, and restricts the shaking of the sector gear 32 by reducing the shaking stroke range of the sector gear 32.

[0036] The described rotary square-case pressure gauge, the measuring tube 5 is connected to the capillary hose 51. The capillary hose 51 can extend to a relatively far place to measure the pressure in a distant place.

[0037] The above are only the preferred embodiments of the present invention. It should be noted that for those skilled in the art, without departing from the overall concept of the present invention, several changes and improvements can still be made, and these should also be regarded as the protection scope of the present invention.

Claims

1. A rotary disc type square shell pressure gauge, comprising a rear cover (1), characterized in that: The rear cover (1) has a copper base (2) fixed inside, a movement (3) fixed on the copper base (2), the movement (3) rotatably connected to a movement shaft (33), and the movement shaft (33) is fixedly connected to a turntable (4); an arc-shaped window (11) is provided on the side of the rear cover (1), and the indication of the turntable (4) can be read from the arc-shaped window (11); the copper base (2) includes a first interface (21) and a second interface (22), the first interface (21) and the second interface (22) are respectively located on both sides of the copper base (2), and the first interface (21) and the second interface (22) are connected in the middle; and a spring tube (41) is also included, the The movement (3) comprises a connecting rod (31); one end of the spring tube (41) is fixedly connected to the first interface (21), and the other end is fixedly connected to the connecting rod (31); the connecting rod (31) is connected to a sector gear (32); one end of the sector gear (32) is fixedly connected to the connecting rod (31), and the other end is a sector gear surface; a rotating shaft (321) is arranged in the middle of the sector gear, and the sector gear can rotate around the rotating shaft (321); the tooth surface of the sector gear (32) cooperates with a gear fixed on the movement shaft (33); the second interface (22) is connected to a measuring tube (5), and the measuring tube (5) is connected to the outside of the pressure gauge.

2. A rotary disc type square shell pressure gauge according to claim 1, characterized in that: A nylon shaft (42) is arranged between the movement shaft (33) and the turntable (4); the movement shaft (33) is inserted into the shaft hole of the nylon shaft (42); the inserted portion is elliptical, and the widest part of the ellipse is larger than the inner diameter of the shaft hole of the nylon shaft (42).

3. A rotary disc square shell pressure gauge as claimed in claim 2, characterized in that: Two support columns (34) for supporting the movement (3) are arranged on the back cover (1), and support holes corresponding to the support columns (34) are arranged on the movement (3).

4. A rotary disc type square shell pressure gauge as claimed in claim 3, characterized in that: The copper seat (2) comprises a mounting hole (23), wherein the mounting hole (23) is provided with an internal thread, one side of the mounting hole (23) is used to cooperate with a screw to fix the copper seat to the back cover, and the other side is used to cooperate with a screw to fix the movement to the copper seat; the screw on the side fixed to the back cover is screwed into the mounting hole outside the back cover, and the screw countersunk hole is installed into the back cover.

5. A rotary disc type square shell pressure gauge as claimed in claim 4, characterized in that: A limiting sleeve (322) is provided on the rotating shaft (321).

6. A rotary disc type square shell pressure gauge as claimed in claim 5, characterized in that: The measuring tube (5) is connected to a capillary hose (51).

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