Anti-impact pointer pressure gauge

Abstract

The utility model relates to a pressure gauge, in particular to an anti-impact pointer pressure gauge. Comprising a pressure gauge body, a pointer is arranged on a movement shaft in the pressure gauge body, the pointer comprises a pointer body, a spring and a pointer tip, a mounting hole is formed in the middle of the pointer body, the pointer body is arranged on the movement shaft through the mounting hole, the spring is arranged between the pointer body and the pointer tip, and the pointer tip is arranged in the mounting hole. The two ends of the spring are fixedly connected with the needle tip and the needle body respectively. According to the anti-impact pointer pressure gauge designed in the scheme, when the pressure of a working medium is sharply reduced or increased and the point of the pointer impacts the stop pin on the dial, the spring deforms and unloads, and the pointer can be effectively prevented from deforming, being damaged and falling off. The pressure gauge does not need to be filled with damping liquid, so that the cost of the pressure gauge is greatly reduced, and the problem of environmental pollution caused by leakage of the damping liquid of the pressure gauge is solved.

Description

Technical Field

[0001] The utility model relates to a pressure gauge, in particular to an anti-shock pointer pressure gauge. Background Art

[0002] Elastomeric pressure gauges have a pointer mounted on an internal movement shaft to indicate the pressure of the measured medium. When operating in a vibrating or pulsating environment, the gauge must be filled with damping fluid to reduce pointer jitter and facilitate reading. Filling the gauge with weather-resistant damping fluid significantly increases the cost of the gauge. Furthermore, leaks of damping fluid can pollute the environment.

[0003] The pressure gauge dial is equipped with a stop pin to determine the initial zero position of the pointer. The pointer inside the pressure gauge is punched from thin sheet metal, which is weak and easily deformed. In the presence of vibration or pressure pulsation, the rigid structure of the pointer causes significant needle tip jitter, making it difficult to read. In actual use, when the working medium pressure decreases or increases sharply, the pointer will move at a high speed. The impact force will strike the stop pin on the dial, causing the pointer to bend or fall off the movement shaft, resulting in damage to the pressure gauge. Summary of the Invention

[0004] The utility model aims to provide a low-cost and non-damageable anti-shock pointer pressure gauge.

[0005] An impact-proof pointer pressure gauge in this solution includes a pressure gauge body, a pointer is provided on the movement shaft inside the pressure gauge body, the pointer includes a needle body, a spring, and a needle tip, a mounting hole is provided in the middle of the needle body, the needle body is arranged on the movement shaft through the mounting hole, the spring is provided between the needle body and the needle tip, and the two ends of the spring are fixedly connected to the needle tip and the needle body respectively.

[0006] Furthermore, the needle body on one side of the mounting hole is a large end, and the needle body on the other side is a small end. The needle body on the large end side is a fan-shaped structure, and the needle body on the small end side is provided with a connecting buckle, which is used to fix one end of the spring.

[0007] Furthermore, the spring is a conical structure, including a large-diameter end and a small-diameter end, the large-diameter end is fixedly connected to the connecting buckle, and the small-diameter end is fixedly connected to one end of the needle tip.

[0008] Furthermore, it also includes a needle cap, which is arranged in the mounting hole in the middle of the needle body. A mounting tapered hole is provided in the needle cap, and the mounting tapered hole is used to closely match the machine core shaft.

[0009] Furthermore, the needle body is formed by punching out a thin metal sheet.

[0010] Furthermore, the needle tip is a hollow aluminum tube structure.

[0011] Furthermore, the connecting buckle includes a connecting portion extending from the small end of the needle body, and curved portions extend in opposite directions on both sides of the connecting portion, and the curved portions are tightly fitted with one end of the spring.

[0012] The advantages of the utility model are:

[0013] 1. When the working medium pressure decreases or increases sharply and the pointer needle hits the stop pin on the dial, the spring deforms and unloads, effectively preventing the pointer from deforming, damaging, or falling off. When the pressure pulsation returns to normal, the pointer returns to its original shape.

[0014] 2. When the environment is vibrating or the pressure is pulsating, the pointer spring can effectively reduce needle tip vibration without affecting the pointer reading. This eliminates the need to fill the pressure gauge with damping fluid, significantly reducing the cost of the pressure gauge and eliminating the environmental pollution caused by damping fluid leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of an anti-shock pointer pressure gauge of the utility model.

[0016] Figure 2 This is a three-dimensional structural diagram of the needle body of an anti-shock pointer pressure gauge of the utility model.

[0017] Figure 3 It is a cross-sectional view of the needle body in the present utility model.

[0018] Figure 4 for Figure 2 Enlarged view of the connecting clip.

[0019] In the figure, 100 is the pressure gauge body, 200 is the pointer, 300 is the stop pin, 1 is the needle body, 1-1 is the mounting hole, 1-2 is the large end, 1-3 is the small end, 2 is the spring, 2-1 is the large-diameter end, 2-2 is the small-diameter end, 3 is the needle tip, 4 is the needle cap, 4-1 is the mounting cone hole, 5 is the connecting buckle, 5-1 is the connecting part, and 5-2 is the bending part. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0021] according to Figures 1 to 4 As shown, this scheme is a shock-proof pointer pressure gauge, see Figure 1The pressure gauge comprises a pressure gauge body 100, a pointer 200 mounted on the movement axis within the pressure gauge body 100, and a stop pin 300 within the dial. Pointer 200 comprises a needle body 1, a spring 2, and a needle tip 3. Needle body 1 is punched from a thin metal sheet. Needle tip 3 is machined from a hollow aluminum tube with a diameter of 0.4 mm, which is lightweight, strong, and resistant to deformation during impact.

[0022] See Figure 2 and Figure 3 The needle body 1 is provided with a mounting hole 1-1 in the middle, and the needle body 1 is mounted on the core shaft through the mounting hole 1-1. In this embodiment, the needle cap 4 is riveted into the mounting hole 1-1 in the middle of the needle body 1. The needle cap 4 is provided with a mounting taper hole 4-1 in the middle, and the mounting taper hole 4-1 is used to fit tightly with the core shaft. The needle body 1 on one side of the mounting hole 1-1 is the large end 1-2, and the needle body 1 on the other side is the small end 1-3. The needle body 1 on the side of the large end 1-2 is a fan-shaped structure.

[0023] A spring 2 is installed between needle body 1 and needle tip 3, with its ends fixedly connected to needle tip 3 and needle body 1, respectively. When the working medium pressure decreases or increases dramatically, and needle tip 3 of pointer 200 strikes a stopper pin 300 on the dial, spring 2 deforms and unloads, effectively preventing pointer 200 from deforming, damaging, or falling off. When pressure pulsation returns to normal, pointer 200 returns to its original position.

[0024] See Figure 2 and Figure 4 Specifically, the needle body 1 is provided with a connecting buckle 5 on the side of the small end 1-3, and the connecting buckle 5 is used to fix one end of the connecting spring 2. In this embodiment, the connecting buckle 5 includes a connecting portion 5-1 extending from the small end 1-3 of the needle body 1, and two curved portions 5-2 extend in opposite directions on both sides of the connecting portion 5-1. The curved portion 5-2 is tightly fitted with one end of the spring 2.

[0025] See Figure 2 and Figure 3 In this embodiment, spring 2 has a conical structure, with two ends, respectively, having a large-diameter end 2-1 and a small-diameter end 2-2, according to their sizes. The large-diameter end 2-1 tightly fits the connecting buckle 5, while the small-diameter end 2-2 tightly fits one end of the needle tip 3. The two ends of spring 2 can naturally twist and deform relative to each other while ensuring a secure connection with the needle body 1 and needle tip 3.

[0026] When the environment is vibrating or the pressure fluctuates, the spring 2 of the pointer 200 effectively reduces the vibration of the needle tip 3, without affecting the reading of the pointer 200. This eliminates the need to fill the pressure gauge with damping fluid, significantly reducing the cost of the pressure gauge and eliminating the environmental pollution caused by leakage of the damping fluid in the pressure gauge.

[0027] The above description is merely an embodiment of the present invention. The well-known specific structures and characteristics of the scheme are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention. These modifications and improvements should also be considered within the scope of protection of the present invention and will not affect the effectiveness of the implementation of the present invention or the practical application of the patent.

Claims

1. A shock-proof pointer pressure gauge, comprising a pressure gauge body (100), wherein a pointer (200) is provided on a movement shaft within the pressure gauge body (100), characterized in that: The pointer (200) comprises a needle body (1), a spring (2), and a needle tip (3); a mounting hole (1-1) is provided in the middle of the needle body (1); the needle body (1) is arranged on the movement shaft through the mounting hole (1-1); the spring (2) is provided between the needle body (1) and the needle tip (3); and the two ends of the spring (2) are fixedly connected to the needle tip (3) and the needle body (1), respectively.

2. The shock-proof pointer pressure gauge according to claim 1, characterized in that: The needle body (1) on one side of the mounting hole (1-1) is a large end (1-2), and the needle body (1) on the other side is a small end (1-3). The needle body (1) on the side of the large end (1-2) is a fan-shaped structure, and the needle body (1) on the side of the small end (1-3) is provided with a connecting buckle (5), and the connecting buckle (5) is used to fix one end of the spring (2).

3. The shock-proof pointer pressure gauge according to claim 2, characterized in that: The spring (2) is a conical structure, comprising a large-diameter end (2-1) and a small-diameter end (2-2); the large-diameter end (2-1) is fixedly connected to the connecting buckle (5), and the small-diameter end (2-2) is fixedly connected to one end of the needle tip (3).

4. The shock-proof pointer pressure gauge according to any one of claims 1 to 3, characterized in that: The needle cap (4) is also included. The needle cap (4) is arranged in the mounting hole (1-1) in the middle of the needle body (1). A mounting tapered hole (4-1) is provided in the needle cap (4). The mounting tapered hole (4-1) is used to tightly fit with the machine core shaft.

5. The shock-proof pointer pressure gauge according to claim 1, characterized in that: The needle body (1) is punched out of a thin metal sheet.

6. The shock-proof pointer pressure gauge according to claim 1, characterized in that: The needle tip (3) is a hollow aluminum tube structure.

7. The shock-proof pointer pressure gauge according to claim 2 or 3, characterized in that: The connecting buckle (5) comprises a connecting portion (5-1) extending from the small end (1-3) of the needle body (1), and curved portions (5-2) extending in opposite directions on both sides of the connecting portion (5-1), and the curved portions (5-2) are tightly matched with one end of the spring (2).

Images