Conversion mechanism for spring pressure gauge

[0020] The specific structure of the present invention will be described below in conjunction with the accompanying drawings of the specification:

[0021] A conversion mechanism for spring pressure gauges, such as Figure 1 to Figure 6 As shown, it includes a watch case 1, a seal 2, a piston block 3, a spring 4, a limiting component 5, a transmission rack 6 and a transmission gear 7. The inner bottom of the watch case 1 is integrally formed with a tubular shell arranged in the transverse direction. Body 8, the side wall of the watch case 1 is formed with an air connection port 11, and one end of the tubular housing 8 is formed with an air inlet passage 10 connecting the inner cavity of the tubular housing 8 and the air connection port 11. , The other end of the tubular housing 8, that is, the side wall of the watch case 1 is provided with an opening 81, the sealing member 2, the piston block 3, the spring 4 and the limiting member 5 The openings 81 are sequentially fitted into the tubular housing 8, the sealing element 2 is fixed on the piston block 3, and the circumferential surface of the sealing element 2 is close to the inner peripheral wall of the tubular housing 8 Contact, the two ends of the spring 4 respectively abut against the piston block 3 and the limiting member 5. The limiting member 5 is fixed in the tubular housing 8, and the side wall of the tubular housing 8 The piston block 3 has a strip hole 82 extending axially along the tubular housing 8, and the piston block 3 has a connecting block 31 extending from the strip hole 82 to the tubular housing 8. The transmission rack 6 can It is movably arranged in the watch case 1 and fixedly connected to the connecting block 31, the transmission gear 7 is coaxially fixed on the pointer mounting shaft 9, and the teeth on the transmission gear 7 are connected to the transmission rack 6 The upper teeth mesh. The conversion mechanism in this embodiment has a reasonable structure. When assembling, the sealing member 2, the piston block 3, the spring 4, and the limiting member 5 are sequentially inserted into the tube through the opening 81 In the housing 8, the limiting component 5 is screwed to the opening 81, and the teeth on the transmission rack 6 are meshed with the teeth on the transmission gear 7. The conversion mechanism has a simple and reasonable structure and is easy to operate during assembly. During installation and use, connect the joint of the air pipe to the air connection port 11, and then high-pressure gas flows into the tubular housing 8 through the air inlet passage 10, and pushes the seal 2 and the piston block 3 under the action of air pressure. Move to the direction close to the limiting component 5, and gradually compress the spring 4, the piston block 3 drives the transmission rack 6 to move through the connecting block 31 during the movement, and then drives the transmission gear 7 and the pointer fixedly connected to it. The rotating shaft 9 rotates together, and then drives the pointer (not shown in the figure) to rotate to indicate the real-time air pressure value on the indicator disk. When the air pressure decreases, the piston block 3 and the seal 2 are driven by the return elastic force of the spring 4 When moving away from the limiting component 5, the connecting block 31 drives the transmission rack 6 to move, and then drives the transmission gear 7 and the pointer mounting shaft 9 fixedly connected to it to rotate together, thereby driving the pointer (not shown in the figure) to rotate. The real-time air pressure value is indicated on the indicator disk. When the piston block 3 and the seal 2 reach the initial position, the pointer points to "0" on the indicator disk. The seal 2 described in this embodiment is a rubber seal or a silicone seal.

[0022] Such as Figure 7 As shown, in this embodiment, the transmission rack 6, the connecting block 31, and the piston block 3 are integrally injection-molded. The adoption of the above structure can further reduce the number of parts and improve the convenience of assembly operations.

[0023] Further, a clamping table 32 is formed on the piston block 3, and a clamping groove 21 is formed on the sealing member 2 to be engaged with the clamping table 32, and the clamping table 32 is clamped with the clamping groove 21 The seal 2 and the piston block 3 are reliably and fixedly connected with each other.

[0024] In this embodiment, the end of the limiting member 5 close to the spring 4 is provided with a first spring positioning structure, and the end of the piston block 3 close to the spring 4 is provided with a second spring positioning structure. The positioning structure and the second spring positioning mechanism are used to position the spring 4, thereby ensuring the installation effect of the spring 4. Specifically, the first spring positioning structure is a positioning protrusion formed on the limiting member 5. The stage 52, the second spring positioning structure is a lumen 33 formed on the piston block 3, the diameter of the lumen 33 matches the outer diameter of the spring 4, and one end of the spring 4 is sleeved On the positioning boss 52, the other end extends into the lumen 33, refer to image 3 with Image 6.

[0025] As a further improvement of the above-mentioned embodiment, the limiting member 5 is an adjusting screw screwed into the tubular housing 8, and the side of the adjusting screw facing outward has an operating portion 51 that facilitates rotating the adjusting screw, so The operating portion 51 is a polygonal hole or a polygonal boss. After matching the wrench tool with the polygonal hole or the polygonal boss, the adjusting screw can be rotated by a proper amount of rotation to adjust the position of the adjusting screw in the tubular housing 8 to achieve the purpose of adjusting the pressure value and calibrating the pressure gauge.

[0026] Obviously, the above-mentioned embodiments of the present invention are merely examples to clearly illustrate the present invention, and are not intended to limit the implementation of the present invention. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is unnecessary and impossible to list all implementation methods here. And these obvious changes or variations derived from the essential spirit of the present invention still belong to the protection scope of the present invention.