Anti-vibration mechanism of pressure gauge movement

Abstract

The utility model discloses a pressure gauge movement anti-vibration mechanism, which comprises a movement assembly and an anti-vibration assembly, the movement assembly comprises a needle shaft which is rotatably arranged on a rack, a driving section of the needle shaft is positioned inside the rack and is in transmission connection with a driving piece, an assembling section of the needle shaft extends out of the rack, and a pointer is assembled at the front end of the assembling section; the anti-seismic assembly comprises a fixing sleeve and a suspension sleeve, the fixing sleeve and the suspension sleeve are both coaxially arranged with the needle shaft, the suspension sleeve movably sleeves the assembly section of the needle shaft, a first filling gap is formed between the inner wall of the suspension sleeve and the needle shaft, the fixing sleeve sleeves the periphery of the suspension sleeve, the end of the fixing sleeve is fixedly connected with the pressure gauge rack, and a second filling gap is formed between the inner wall of the suspension sleeve and the needle shaft. A second filling gap is formed between the inner wall of the fixed sleeve and the outer wall of the suspension sleeve; the first filling seam and the second filling seam are both filled with damping oil. The structure is simple, the cost is low, the anti-vibration assembly is directly sleeved on the needle shaft, the assembly is convenient and fast, and the adaptability is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure gauges, and in particular relates to an anti-vibration mechanism for a pressure gauge movement. Background Art

[0002] Pressure gauges are widely used in pressure vessels and pressure pipes. Some of them are used on equipment with high-frequency vibrations. When the equipment vibrates, the pressure gauge pointer will also vibrate at high frequencies, making it impossible to accurately observe the pressure. There are two existing solutions. One is to fill a large amount of resistance oil inside the pressure gauge, which has limited shock absorption effect. The other is to change the mechanical structure of the pressure gauge movement. This shock absorption method is acceptable, but the improved movement structure is complex, costly and poorly adaptable. Summary of the invention

[0003] In view of the above technical problems, the utility model provides a pressure gauge movement anti-vibration mechanism with simple structure, low cost and high adaptability.

[0004] The invention objective of the utility model is achieved through the following technical solutions:

[0005] A seismic-resistant mechanism for a pressure gauge movement comprises a movement assembly and a seismic-resistant assembly, wherein the movement assembly comprises a needle shaft rotatably arranged on a frame, the driving section of the needle shaft is located inside the frame and is transmission-connected to a driving member, the assembly section of the needle shaft extends from the frame, and a pointer is assembled at the front end of the assembly section; the seismic-resistant assembly comprises a fixed sleeve and a suspension sleeve, both of which are coaxially arranged with the needle shaft, the suspension sleeve is movably mounted on the assembly section of the needle shaft, a first filling seam is formed between the inner wall of the suspension sleeve and the needle shaft, the fixed sleeve is mounted on the periphery of the suspension sleeve, and an end of the fixed sleeve is fixedly connected to the pressure gauge frame, a second filling seam is formed between the inner wall of the fixed sleeve and the outer wall of the suspension sleeve; the first filling seam and the second filling seam are both filled with damping oil.

[0006] Preferably, the suspension sleeve is a thin-walled hollow structure, and a first inner hole and a first cylindrical hole are coaxially connected therein, and the front end of the needle shaft passes through the first cylindrical hole.

[0007] Preferably, the suspension sleeve is axially segmented into a reduced diameter section and a constant diameter section, wherein the reduced diameter section corresponds to the first inner hole, and the constant diameter section corresponds to the first cylindrical hole, and the outer diameter of the reduced diameter section gradually decreases from the open end to the connecting end, and the open end is abutted against the frame.

[0008] Preferably, the first filling gap comprises a conical section and an annular section, the conical section is defined by the reduced diameter section of the suspension sleeve and the needle shaft, and the annular section is defined by the equal diameter section of the suspension sleeve and the needle shaft; the conical section serves as a pre-storage chamber for the damping oil.

[0009] Preferably, the fixing sleeve is a thick-walled hollow structure, and a second inner hole and a second cylindrical hole are coaxially connected therein, wherein the second inner hole corresponds to the reduced diameter section, and the second cylindrical hole corresponds to the equal diameter section, and the equal diameter section passes through the second cylindrical hole.

[0010] Preferably, the diameter of the second inner-retracted hole matches the outer diameter of the reduced-diameter section, the diameter of the second cylindrical hole matches the outer diameter of the equal-diameter section, and the second filling seam maintains consistent gap sizes in the circumferential and axial directions.

[0011] Preferably, the fixing sleeve is axially segmented with a coaxial fixing section and an extending section, an end of the fixing section is fixedly connected to the frame, and an outer diameter of the fixing section is greater than an outer diameter of the extending section.

[0012] Preferably, the movement assembly further comprises a sleeve, which is fixedly sleeved on the driving section of the needle shaft; a first transmission tooth is provided on the outer wall of the sleeve, and a transmission assembly is provided between the sleeve and the driving member.

[0013] Preferably, the transmission assembly includes a swing arm, which is rotatably arranged in the frame through a support shaft. The swing arm includes a driving end and a linkage end which are arranged on both sides of the support shaft. The driving end is drivingly connected to the driving member, and the linkage end is provided with a second transmission tooth which meshes with the first transmission tooth.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the anti-seismic component has a simple structure and low cost, and the anti-seismic component is directly mounted on the needle shaft, which is convenient to assemble and highly adaptable, and can be adapted to pressure gauges of different models; the anti-seismic component is composed of a fixed sleeve and a suspension sleeve, which cooperates with the needle shaft to form two filling seams for filling damping oil, and has double buffering, which effectively improves the shock absorption effect; the suspension sleeve is a thin-walled hollow structure, and is movably mounted on the needle shaft, and the damping oil in the two filling seams can provide a more effective buffering force for the needle shaft; the fixed sleeve is a thick-walled hollow structure, which is mounted on the periphery of the suspension sleeve and fixedly connected to the frame, which can increase the vibration resistance and thus improve the anti-seismic effect; the suspension sleeve is divided into a reduced diameter section and an equal diameter section along the axial direction, so that the first filling seam forms a conical section and an annular section, and the conical section can be used as a pre-storage chamber for damping oil to avoid frequent oil replenishment; the second inner hole of the fixed sleeve cooperates with the reduced diameter section to achieve axial limitation of the suspension sleeve, and the assembly is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the movement assembly and the anti-seismic assembly in the utility model;

[0017] Figure 3 This is a cross-sectional view of the movement assembly and the anti-seismic assembly in the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the fixed sleeve in the utility model;

[0019] Figure 5 This is a schematic diagram of the structure of the suspension sleeve in the utility model;

[0020] Markings in the figure: frame 10; needle shaft 21; sleeve 22; fixed sleeve 30; fixed section 31; extension section 32; second inner hole 33; suspension sleeve 40; reduced diameter section 41; equal diameter section 52; first inner hole 43; first filling gap 51; conical section 511; annular section 512; second filling gap 52; swing arm 61; driving end 611; linkage end 612; support shaft 62. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0022] like Figure 1-Figure 5 As shown, the present embodiment discloses a seismic resistance mechanism of a pressure gauge movement, which includes a movement assembly and a seismic resistance assembly, wherein the movement assembly includes a needle shaft 21 and a sleeve 22 rotatably arranged on a frame 10, wherein the driving section of the needle shaft 21 is located inside the frame 10 and is drivingly connected to the driving member, the assembly section of the needle shaft 21 extends from the frame 10, and the pointer is assembled at the front end of the assembly section; the sleeve 22 fixing sleeve 30 is mounted on the driving section of the needle shaft 21; a first transmission tooth is provided on the outer wall of the sleeve 22, and a transmission assembly is provided between the sleeve 22 and the driving member; the transmission assembly includes a swing arm 61, which is rotatably arranged in the frame 10 through a support shaft 62, and the swing arm 61 includes a driving end 611 and a linkage end 612 respectively arranged on both sides of the support shaft 62, the driving end 611 is drivingly connected to the driving member, and the linkage end 612 is provided with a second transmission tooth meshing with the first transmission tooth.

[0023] The anti-seismic assembly includes a fixed sleeve 30 and a suspension sleeve 40. The fixed sleeve 30 and the suspension sleeve 40 can be made of metal, plastic or other materials. In this embodiment, both are made of metal. The fixed sleeve 30 and the suspension sleeve 40 are coaxially arranged with the needle shaft 21. The suspension sleeve 40 is movably mounted on the assembly section of the needle shaft 21. A first filling gap 51 is formed between the inner wall of the suspension sleeve 40 and the needle shaft 21. The fixed sleeve 30 is mounted on the periphery of the suspension sleeve 40, and the end of the fixed sleeve 30 is fixedly connected to the pressure gauge frame 10. A second filling gap 52 is formed between the inner wall of the fixed sleeve 30 and the outer wall of the suspension sleeve 40. The first filling gap 51 and the second filling gap 52 are both filled with damping oil. The fixed sleeve 30 and the suspension sleeve 40 cooperate with the needle shaft 21 to form two filling gaps for filling damping oil, which has double buffering and effectively improves the shock absorption effect.

[0024] The suspension sleeve 40 is a thin-walled hollow sleeve, and a first inner hole 43 and a first cylindrical hole are coaxially connected therein. The front end of the needle shaft 21 passes through the first cylindrical hole. The suspension sleeve 40 adopts a thin-walled hollow structure and is movably sleeved on the needle shaft 21. The damping oil in the two filling gaps can provide a more effective buffering force for the needle shaft 21; the suspension sleeve 40 is divided into a reduced diameter section 41 and a constant diameter section 52 along the axial direction, wherein the reduced diameter section 41 corresponds to the first inner hole 43, and the constant diameter section 52 corresponds to the first cylindrical hole. The outer diameter of the reduced diameter section 41 gradually decreases from the open end to the connecting end, and the open end is close to the frame 10; the first filling seam 51 includes a tapered section 511 and an annular section 512, the tapered section 511 is defined by the reduced diameter section 41 of the suspension sleeve 40 and the needle shaft 21, and the annular section 512 is defined by the equal diameter section 52 of the suspension sleeve 40 and the needle shaft 21; the volume of the tapered section 511 is greater than the volume of the annular section 512, and the tapered section 511 is used as a pre-storage chamber for damping oil to avoid frequent oil replenishment, which is more convenient to use.

[0025] The fixing sleeve 30 is a thick-walled hollow sleeve, and a second inner hole 33 and a second cylindrical hole are coaxially connected therein, wherein the second inner hole 33 corresponds to the reduced diameter section 41, so as to axially limit the suspension sleeve 40 and realize quick assembly, and the second cylindrical hole corresponds to the equal diameter section 52, and the equal diameter section 52 passes through the second cylindrical hole; the aperture of the second inner hole 33 is adapted to the outer diameter of the reduced diameter section 41, and the aperture of the second cylindrical hole is adapted to the outer diameter of the equal diameter section 52, and the second filling seam 52 has the same size of circumferential and axial gaps, which has provided a more stable buffering force; the fixing sleeve 30 is axially segmented with a coaxial fixing section 31 and an extension section 32, the end of the fixing section 31 is fixedly connected to the frame 10, and the outer diameter of the fixing section 31 is greater than the outer diameter of the extension section 32, and the fixing sleeve 30 is a thick-walled hollow structure, which is sleeved on the periphery of the suspension sleeve 40 and fixedly connected to the frame 10, and can increase the vibration resistance, thereby improving the anti-seismic effect.

[0026] The anti-seismic component of the utility model has a simple structure, low cost, convenient assembly and high adaptability.

[0027] It should be understood that in the claims and description of the utility model, all "including..." should be understood as open-ended meanings, that is, their meanings are equivalent to "at least including...", and should not be understood as closed-ended meanings, that is, their meanings should not be understood as "only including...". The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0028] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should be covered by the protection scope of the utility model.

Claims

1. A pressure gauge movement anti-seismic mechanism, characterized in that: It includes a movement component and an anti-seismic component, the movement component includes a needle shaft rotatably arranged on a pressure gauge frame, the driving section of the needle shaft is transmission-connected to the driving member, the assembly section of the needle shaft extends from the frame, and the pointer is assembled at the front end of the assembly section; the anti-seismic component includes a fixed sleeve and a suspension sleeve, the fixed sleeve and the suspension sleeve are both coaxially arranged with the needle shaft, the suspension sleeve is movably sleeved on the assembly section of the needle shaft, a first filling gap is formed between the inner wall of the suspension sleeve and the needle shaft, the fixed sleeve is sleeved on the periphery of the suspension sleeve, and the end of the fixed sleeve is fixedly connected to the frame, a second filling gap is formed between the inner wall of the fixed sleeve and the outer wall of the suspension sleeve; the first filling gap and the second filling gap are both filled with damping oil.

2. The anti-seismic mechanism of a pressure gauge movement according to claim 1, characterized in that: The suspension sleeve is a thin-walled hollow structure, and a first inner hole and a first cylindrical hole that are coaxially connected are provided inside the suspension sleeve, and the front end of the needle shaft passes through the first cylindrical hole.

3. The anti-seismic mechanism of a pressure gauge movement according to claim 2, characterized in that: The suspension sleeve is axially segmented to provide a reduced diameter section and a constant diameter section, wherein the reduced diameter section corresponds to the first inner hole, and the constant diameter section corresponds to the first cylindrical hole. The outer diameter of the reduced diameter section gradually decreases from the open end to the connecting end, and the open end is close to the frame.

4. The anti-seismic mechanism of a pressure gauge movement according to claim 3, characterized in that: The first filling gap includes a tapered section and an annular section. The tapered section is defined by the reduced diameter section of the suspension sleeve and the needle shaft, and the annular section is defined by the equal diameter section of the suspension sleeve and the needle shaft. The tapered section serves as a pre-storage chamber for the damping oil.

5. The anti-seismic mechanism of a pressure gauge movement according to claim 4, characterized in that: The fixing sleeve is a thick-walled hollow structure, and a second inner hole and a second cylindrical hole are coaxially connected therein, wherein the second inner hole corresponds to the reduced diameter section, and the second cylindrical hole corresponds to the equal diameter section, and the equal diameter section passes through the second cylindrical hole.

6. The anti-seismic mechanism of a pressure gauge movement according to claim 5, characterized in that: The aperture of the second inner-retracted hole is matched with the outer diameter of the reduced diameter section, the aperture of the second cylindrical hole is matched with the outer diameter of the equal diameter section, and the second filling seam maintains consistent gap sizes in the circumferential direction and the axial direction.

7. A pressure gauge movement anti-vibration mechanism according to claim 6, characterized in that: The fixing sleeve is axially segmented with a coaxial fixing section and an extending section, the end of the fixing section is fixedly connected to the frame, and the outer diameter of the fixing section is greater than the outer diameter of the extending section.

8. A pressure gauge movement anti-seismic mechanism according to any one of claims 1 to 7, characterized in that: The movement assembly also includes a shaft sleeve, which is fixedly sleeved on the driving section of the needle shaft; a first transmission tooth is provided on the outer wall of the shaft sleeve, and a transmission assembly is provided between the shaft sleeve and the driving member.

Images