Mechanical pressure gauge

Abstract

The utility model relates to a pressure gauge, concretely relates to a mechanical pressure gauge, including panel assembly, measuring component and gauge shell, the measuring component is located in the gauge shell, the measuring component includes base, spring tube and transmission rod, one end of base is the threaded joint, the other end fixedly connected movement core subassembly, one end of spring tube is connected base, the other end is connected transmission rod one end, the other end of transmission rod is equipped with the sector gear, the sector gear engages movement core subassembly, transmission rod includes first connecting rod, second connecting rod and third connecting rod, one end of first connecting rod is connected in spring tube, the other end of first connecting rod fixedly connected one end of second connecting rod, the other end of second connecting rod fixedly connected one end of third connecting rod, the other end of third connecting rod sets up sector gear, the mechanical pressure gauge with the adoption of the scheme has the advantages of accurate detection, longer life.

Description

Technical Field

[0001] This utility model relates to a pressure gauge, specifically a mechanical pressure gauge. Background Technology

[0002] Mechanical pressure gauges use an elastic element within the gauge as the sensing element. For example, the elastic deformation of a Bourdon tube transmits the pressure deformation to the pointer through a conversion mechanism within the gauge's movement, thereby displaying a digital reading on the dial to indicate pressures higher than ambient pressure.

[0003] In mechanical pressure gauges, the elastic deformation of the Bourdon tube and the pressure of the mechanism are transmitted through a connecting rod or transmission rod. In existing technologies, the connecting rod is mostly integrally formed and bent. However, with the increasing number of applications for pressure gauges, such as small-diameter pressure gauges used in special installation scenarios with a maximum outer diameter of 41mm, the internal volume of the gauge is relatively small. The integrally formed and bent connecting rod can no longer be installed after a large bend. Due to the stress, the strength at the bend will be greatly reduced, making it difficult to maintain its accurate transmission characteristics for a long time. Utility Model Content

[0004] The present invention aims to provide a mechanical pressure gauge that is smaller in size, more accurate in detection, and has a longer lifespan.

[0005] This solution provides a mechanical pressure gauge, comprising a panel assembly, a measuring assembly, and a case. The measuring assembly is housed within the case and includes a base, a Bourdon tube, and a transmission rod. One end of the base is a threaded connector, and the other end is fixedly connected to a movement assembly. One end of the Bourdon tube is connected to the base, and the other end is connected to one end of the transmission rod. The other end of the transmission rod is provided with a sector gear that meshes with the movement assembly. The threaded connector extends from a through hole in the center of the back plate of the case. The transmission rod includes a first connecting rod, a second connecting rod, and a third connecting rod. One end of the first connecting rod is connected to the Bourdon tube, and the other end of the first connecting rod is fixedly connected to one end of the second connecting rod. The other end of the second connecting rod is fixedly connected to one end of the third connecting rod, and the other end of the third connecting rod is provided with the sector gear.

[0006] Furthermore, the movement assembly includes a movement drive gear shaft and a movement fixing plate. The movement fixing plate is fixedly installed on the end face of the base, and the movement drive gear shaft meshes with the sector gear and passes through the surface of the movement fixing plate.

[0007] Furthermore, the panel assembly includes a pointer, a dial, a lens, and a bezel. The dial is fixedly connected to the movement assembly, the pointer is fixedly mounted on the movement drive gear shaft, the lens is mounted inside the bezel, and the bezel is detachably fixedly connected to the watch case.

[0008] Furthermore, the face ring is snapped onto the watch case.

[0009] Furthermore, the lens is a planar lens. Planar lens design facilitates production and helps control costs.

[0010] Furthermore, the first connecting rod has a helical bending structure.

[0011] Furthermore, the second connecting rod has a bending reinforcement section in the middle of its body.

[0012] Furthermore, the third link has a U-shaped structure.

[0013] The advantages of this utility model are: the mechanical pressure gauge of this solution divides the traditional single transmission rod into a segmented structure, so that the transmission rod can be bent and connected to adapt to the narrow gauge case, and the strength can be maintained for a long time after bending, without fatigue deformation caused by long-term operation, which can improve the accuracy of measurement and extend the service life of the pressure gauge. Attached Figure Description

[0014] Figure 1 This is a perspective view of a mechanical pressure gauge according to the present invention;

[0015] Figure 2 This is an exploded view of a mechanical pressure gauge according to the present invention.

[0016] Figure 3 This is a schematic diagram of the measuring component in this utility model;

[0017] Figure 4 This is a schematic diagram of the measuring component in this utility model.

[0018] In the diagram, 100 is the panel assembly, 200 is the measuring assembly, 300 is the watch case, 1 is the pointer, 2 is the dial, 3 is the lens, 4 is the bezel, 5 is the raised dot, 6 is the base, 7 is the Bourdon tube, 8 is the transmission rod, 9 is the sector gear, 10 is the movement transmission gear shaft, 11 is the movement mounting plate, 12 is the threaded joint, 13 is the movement mounting base, 8-1 is the first connecting rod, 8-2 is the second connecting rod, and 8-3 is the third connecting rod. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0020] according to Figures 1 to 4As shown, a mechanical pressure gauge in this solution includes a panel assembly 100, a measuring assembly 200, and a case 300. The panel assembly 100 includes a pointer 1, a scale 2, a lens 3, and a face ring 4. The scale 2 is fixedly connected to the movement assembly. The pointer 1 is fixedly mounted on the transmission gear shaft 10 of the movement. The lens 3 is snapped into the face ring 4. The face ring 4 has multiple protrusions 5 on its circumferential edge, which are detachably snapped into and fixed to the case 300. In this embodiment, the lens 3 is a planar lens 3. The face ring 4 has no complex structural design, and the circumferential protrusions 5 are designed to fit tightly to the case 300. This reduces the overall size of the product and lowers costs.

[0021] The measuring component 200 is disposed within the watch case 300. The measuring component 200 includes a base 6, a spring tube 7, and a transmission rod 8. One end of the base 6 is a threaded connector 12, and the other end is a movement mounting base 13, which is connected to the movement assembly by screws. The spring tube 7 has a C-shaped structure. One end of the spring tube 7 is connected to the base 6, and the tube body of the spring tube 7 surrounds the base 6. The other end is connected to one end of the transmission rod 8. The other end of the transmission rod 8 is provided with a sector gear 9, which meshes with the movement assembly. The threaded connector 12 extends from a through hole in the center of the back plate of the watch case 300.

[0022] The movement assembly includes a movement drive gear shaft 10 and a movement fixing plate 11. The movement fixing plate 11 is fixedly installed on the end face of the base 6. The movement drive gear shaft 10 meshes with the sector gear 9 and passes through the plate surface of the movement fixing plate 11.

[0023] In this embodiment, the transmission rod 8 includes a first connecting rod 8-1, a second connecting rod 8-2, and a third connecting rod 8-3. One end of the first connecting rod 8-1 is connected to the spring tube 7, and the other end of the first connecting rod 8-1 is riveted and fixedly connected to one end of the second connecting rod 8-2. The other end of the second connecting rod 8-2 is riveted and fixedly connected to one end of the third connecting rod 8-3. The other end of the third connecting rod is integrally formed with a sector gear 9.

[0024] The first connecting rod 8-1 has a spiral bending structure with a radial bend of 90° in the middle. The second connecting rod 8-2 has a bending reinforcement section in the middle, which is a U-shaped structure. The third connecting rod 8-3 also has a U-shaped bending structure.

[0025] This solution presents a mechanical pressure gauge that divides the traditional single transmission rod 8 into a segmented structure consisting of a first connecting rod 8-1, a second connecting rod 8-2, and a third connecting rod 8-3. This allows the transmission rod 8 to be bent to accommodate narrow gauge housings. While ensuring transmission, the rod maintains its strength even after bending, preventing fatigue deformation due to prolonged operation. This improves measurement accuracy and extends the lifespan of the pressure gauge.

[0026] The above description is merely an embodiment of this utility model, and common knowledge such as specific structures and characteristics of the solution is not described in detail here. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of this utility model, and these should also be considered within the protection scope of this utility model. These modifications and improvements will not affect the effectiveness of the implementation of this utility model or the practicality of the patent.

Claims

1. A mechanical pressure gauge, characterized in that: The watch includes a panel assembly, a measuring assembly, and a watch case. The measuring assembly is located inside the watch case and includes a base, a Bourdon tube, and a transmission rod. One end of the base is a threaded connector, and the other end is fixedly connected to the movement assembly. One end of the Bourdon tube is connected to the base, and the other end is connected to one end of the transmission rod. The other end of the transmission rod is provided with a sector gear, which meshes with the movement assembly. The threaded connector extends from a through hole in the center of the back plate of the watch case. The transmission rod includes a first link, a second link, and a third link. One end of the first link is connected to the Bourdon tube, and the other end of the first link is fixedly connected to one end of the second link. The other end of the second link is fixedly connected to one end of the third link, and the other end of the third link is provided with the sector gear.

2. A mechanical pressure gauge according to claim 1, characterized in that: The movement assembly includes a movement drive gear shaft and a movement fixing plate. The movement fixing plate is fixedly installed on the end face of the base. The movement drive gear shaft meshes with the sector gear and passes through the surface of the movement fixing plate.

3. A mechanical pressure gauge according to claim 2, characterized in that: The panel assembly includes a pointer, a dial, a lens, and a bezel. The dial is fixedly connected to the movement assembly, the pointer is fixedly mounted on the movement drive gear shaft, the lens is mounted inside the bezel, and the bezel is detachably and fixedly connected to the watch case.

4. A mechanical pressure gauge according to claim 3, characterized in that: The bezel is snapped into the watch case.

5. A mechanical pressure gauge according to claim 3, characterized in that: The lens is a plane lens.

6. A mechanical pressure gauge according to claim 1, characterized in that: The first connecting rod has a helical bending structure.

7. A mechanical pressure gauge according to claim 1, characterized in that: The second connecting rod has a bending reinforcement section in the middle of its body.

8. A mechanical pressure gauge according to claim 1, characterized in that: The third link has a U-shaped structure.

Images