Air compressor structure

Abstract

PURPOSE: To provide an air compressor structure provided with durability by simplifying the structure of a pressure gage.SOLUTION: This air compressor structure comprises: a cylinder; a piston; a cylinder cover; and a pressure gage. The piston is coupled in the cylinder, and executes reciprocal motion to generate compressed air. The cylinder cover is assembled in the cylinder, and receives the compressed air. The pressure gage includes a propulsive cylinder, a dial, a pointer, and a spring. The propulsive cylinder is movably installed in the cylinder cover. The propulsive cylinder has a gear rack. The dial is installed on the surfacer of the cylinder cover. The pointer has a pointer part and a rotary shaft. The rotary shaft is installed in the cylinder cover. The rotary shaft has a gear, and is coupled with the gear rack. The pointer part extends from the rotary shaft, and is positioned on the dial. The spring is installed in the cylinder cover, and brought into contact with the propulsive cylinder.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an air compressor structure. [Background technology]

[0002] Currently, small air compressors used to inflate items such as car tires and air mattresses have two exhaust ducts installed on the air storage base of the machine: one is used to attach a pressure gauge, and the other is used to connect one end of a hose equipped with an air nozzle. This air nozzle is connected to the item to be inflated, such as a car tire, and delivers the compressed air generated by the operation of the air compressor to the item to be inflated, thereby achieving the purpose of inflating the item. The pressure gauge allows the user to visually check the current pressure value and is used as the basis for controlling the safety of the inflation operation.

[0003] The pressure gauges described above are often mechanical pointer-type pressure gauges manufactured based on the principle of a Bourdon tube. However, this type of pressure gauge requires many precision parts, which are easily damaged and reduce the accuracy of measurement, so the efficiency of use of this type of pressure gauge is not evaluated. Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention provides an air compressor structure that simplifies the structure of the pressure gauge and is durable. [Means for solving the problem]

[0005] The air compressor structure of the present invention includes a cylinder, a piston, a cylinder cover, and a pressure gauge. The piston is coupled within the cylinder and reciprocates to generate compressed air. The cylinder cover is assembled to the cylinder and receives the compressed air. The pressure gauge includes a propellant tube, a dial, a pointer, and a spring. The propellant tube is movably disposed within the cylinder cover and has a gear rack. The dial is mounted on the surface of the cylinder cover. The pointer has a pointer portion and a rotation shaft. The rotation shaft is mounted on the cylinder cover and has a gear and is coupled to the gear rack. The pointer portion extends from the rotation shaft and is located on the dial. The spring is mounted within the cylinder cover and abuts against the propellant tube. Compressed air provides a driving force to the propellant tube, moving the propellant tube within the cylinder cover and deforming the spring to generate elasticity. The moving propeller tube moves the pointer part of the hand on the dial by combining the gear rack and gear, and when the balance between the driving force and the elastic force is maintained, the propeller tube stops moving and reflects the pressure value of the compressed air. [Effects of the Invention]

[0006] As described above, since the pressure gauge with an air compressor structure is installed on the cylinder cover, compressed air generated by the reciprocating piston within the cylinder directly enters the cylinder cover, allowing the pressure value of the compressed air to be quickly reflected via the pressure gauge. The pressure gauge includes a propellant tube, a dial, a pointer, and a spring. The compressed air provides driving force to the propellant tube, causing it to move within the cylinder cover. As the propellant tube moves, it converts its linear motion into rotational motion of the pointer by combining a gear rack and a pointer gear. At the same time, the linear motion of the propellant tube deforms the spring abutting it, generating elastic force until the driving force and elastic force are balanced. When this balance is reached, the propellant tube stops moving, and the pointer points to the dial, reflecting the pressure value of the compressed air. Therefore, compared with existing technologies, the pressure gauge significantly simplifies the components, and the connections between the components are intuitive and do not require complex designs, effectively achieving the purpose of pressure sensing with a simple and compact structure. [Brief explanation of the drawings]

[0007] [Figure 1] 1 is a schematic diagram of an air compressor structure according to one embodiment of the present invention; [Figure 2] FIG. 2 is an exploded view of the air compressor structure of FIG. 1. [Figure 3] FIG. 2 is an exploded view of the components of the cylinder cover. [Figure 4] FIG. 4 is a partial cross-sectional view of the cylinder cover. [Figure 5A] FIG. 2 is a partial cross-sectional view of a cylinder cover and a pressure gauge. [Figure 5B] 5B shows another state of the pressure gauge of FIG. 5A. [Figure 6A] FIG. 1 is a schematic diagram of a dial placed on a cylinder cover in one identification direction. [Figure 6B] 10 is a schematic diagram of the dial placed on the cylinder cover in another identification direction. FIG. [Figure 6C]FIG. 10 is a schematic diagram of the dial placed on the cylinder cover in yet another identification direction. DETAILED DESCRIPTION OF THE INVENTION

[0008] FIG. 1 is a schematic diagram of an air compressor structure according to one embodiment of the present invention. FIG. 2 is an exploded view of the air compressor structure of FIG. 1. Here, Cartesian coordinates XYZ are provided to facilitate depiction of the components. Referring simultaneously to FIGS. 1 and 2, in this embodiment, the air compressor structure 100 includes a cylinder 110, a cylinder cover 120, a piston 130, a transmission mechanism 140, a motor 150, and a pressure gauge 160. The cylinder cover 120 is assembled to the cylinder 110. The transmission mechanism 140 is connected between the motor 150 and a lower end of the piston 130, and the upper end of the piston 130 is movably coupled within the cylinder 110. Thus, the motor 150 can drive the piston 130 to reciprocate within the cylinder 110 via the transmission mechanism 140 (e.g., a gear set in the figure) to generate compressed air. Here, the upper end of the piston 130 moves toward or away from the cylinder cover 120 as it reciprocates, and when the piston 130 compresses air during its stroke, its upper end also moves toward the cylinder cover 120, simultaneously pushing the compressed air from the cylinder 110 toward the cylinder cover 120. When the piston 130 returns to its original position and resets, the upper end of the piston 130 moves away from the cylinder cover 120, allowing air from the external environment to flow into the cylinder 110. The cylinder cover 120 has an exhaust port 123, and after the piston 130 generates compressed air within the cylinder 110, the compressed air is pushed into the cylinder cover 120 by the piston 130 as described above, and then discharged from the air compressor structure 100 through the exhaust port 123.

[0009] 2, the cylinder cover 120 has an integrated structure and is divided into a cover body 121, a carrier 122, and the above-mentioned exhaust port 123. Here, compressed air enters the cover body 121 of the cylinder cover 120 from the cylinder 110, then enters the air storage chamber 122a of the carrier 122, and finally is discharged from the cylinder cover 120 through the exhaust port 123.

[0010] FIG. 3 is an exploded view of the components of the cylinder cover. FIG. 4 is a partial cross-sectional view of the cylinder cover. FIG. 5A is a partial cross-sectional view of the cylinder cover and the pressure gauge. Referring to FIGS. 3, 4, and 5A simultaneously, in this embodiment, the exhaust port 123 extends to the air storage chamber 122a to form the opening 123a. Therefore, the compressed air described above enters the air storage chamber 122a of the carrier 122 through the cover body 121 and is then discharged from the carrier 122 through the opening 123a and the exhaust port 123.

[0011] The carrier 122 also has a storage chamber 122b that is separate from the air storage chamber 122a but communicates with it via an opening 122d. The pressure gauge 160 includes a propellant tube 161, a numerical (scale) panel 162, a pointer 163, a spring 164, and an adjustment member 165. The propellant tube 161 is movably installed within the storage chamber 122b of the cylinder cover 120 and has a notch 161b and a gear rack 161a located on one side of the notch 161b. The dial 162 is installed on the surface of the cylinder cover 120. The pointer 163 has a pointer portion 163b and a rotating shaft 163a. ​​The rotating shaft 163a is installed in the cylinder cover 120 and passes through the propellant tube 161 and the notch 161b. A gear 163c is installed on the outside of the rotating shaft 163a and is coupled to the gear rack 161a located on one side of the notch 161b. The pointer portion 163b extends from the rotation axis 163a and is positioned on the dial 162. Compressed air in the air storage chamber 122a of the cylinder cover 120 enters the storage chamber 122b through the opening 122d and drives the propulsion tube 161 to move in the Z-axis direction, and by combining the gear rack 161a and the gear 163c, the pointer portion 163b of the pointer 163 moves on the dial 162 (rotates about the X-axis), and reflects the pressure value of the compressed air.

[0012] 5B shows another state of the pressure gauge of FIG. 5A. Referring to both FIGS. 5A and 5B, in this embodiment, the spring 164 is accommodated in the accommodation chamber 122b and abuts against the propellant tube 161 to resist the driving force applied to the propellant tube 161 by compressed air. The adjustment member 165 is movably mounted to the cylinder cover 120, and the spring 164 abuts between the adjustment member 165 and the propellant tube 161. More specifically, the adjustment member 165 includes a cover body 165a and a shaft body 165b. The cover body 165a has an internal thread 165c and is movably screwed to a stud 122c extending from and projecting from the carrier 122 of the cylinder cover 120. The spring 164 abuts between the cover body 165a and the propellant tube 161. The shaft body 165b extends from the cover body 165a into the accommodation chamber 122b of the cylinder cover 120. Here, the spring 164 is sleeve-connected to the shaft body 165b. Furthermore, since the outer diameter D1 of the shaft body 165b in this embodiment is smaller than the inner diameter D2 of the propulsion tube 161, the propulsion tube 161 can be sleeve-connected to the shaft body 165b when the propulsion tube 161 is driven by compressed air and moves in the Z-axis direction.

[0013] In this way, the designer can select an appropriate spring 164 based on the correspondence between the gear rack 161a and the gear 163c, and then fine-tune the deformation of the spring 164 by combining the cover body 165a and the stud 122c, so that the pressure applied to the propellant tube 161 by the compressed air drives the pointer 163 to quickly and accurately indicate the corresponding pressure value.

[0014] The pressure gauge 160 of this embodiment also includes a seal ring 166 sleeve-connected to the propellant tube 161 and abutting against the inner wall W1 of the accommodation chamber 122b of the cylinder cover 120. The seal ring 166 moves within the accommodation chamber 122b together with the propellant tube 161. The carrier 122 of the cylinder cover 120 also has a discharge port 122e, which communicates with the external environment and the accommodation chamber 122b. The discharge port 122e is located on the movement path of the seal ring 166. When the seal ring 166 reaches the discharge port 122e, the compressed air that originally entered the accommodation chamber 122b and pushed the propellant tube 161 is discharged from the air compressor structure 100 through the discharge port 122e. This provides a limit limiting effect for the pressure gauge 16, allowing excessive air pressure to be discharged when the air pressure exceeds a safe operating value during operation, protecting the entire air compressor components, the item to be inflated, and the operator from damage.

[0015] 6A to 6C are schematic diagrams of dials arranged on the cylinder cover in different identification directions. Referring to Fig. 6A to 6C, in this embodiment, the pointer 163 (the pointer portion 163b) rotates about the X-axis on the dial 162 by driving the rotation shaft 163a. ​​Therefore, to facilitate user operation and identification habits, the dials 1621, 1622, and 1623 are arranged on the surface of the carrier 122 of the cylinder cover 120 in a variety of different identification directions, allowing the user to select one.

[0016] As described above, in the above embodiment of the present invention, the pressure gauge of the air compressor structure is installed on the cylinder cover, so that the compressed air generated by the reciprocating piston in the cylinder directly enters the cylinder cover, allowing the pressure value of the compressed air to be quickly reflected through the pressure gauge. The pressure gauge includes a propellant tube, a dial, a pointer, and a spring. The propellant tube moves within the cylinder cover after receiving the driving force of the compressed air, and the linear motion of the propellant tube is converted into rotational motion of the pointer by combining the gear rack of the propellant tube with the gear of the pointer. At the same time, the linear motion of the propellant tube deforms the spring abutting on it, generating elastic force. When the elastic force and the driving force are balanced, the propellant tube stops moving, and the pointer points to the dial to reflect the compressed air value.

[0017] The pressure gauge also includes an adjusting member, and the spring is positioned between the adjusting member and the propellant tube, so that the designer can select and combine the characteristics of the gear rack and gear, and further combine the elasticity of the spring and the spring deformation control by the adjusting member to quickly and accurately reflect the compressed air pressure value on the dial through the pointer. Conversely, for pistons and cylinders with different compression capacities, the adaptability of the compressed air can be reflected by selecting the above-mentioned components.

[0018] Therefore, compared with existing technology, the pressure gauge has the obvious effect of simplifying the components, and the connections between the components are intuitive and do not require complex designs, so that the purpose of pressure sensing can be achieved effectively with a simple and compact structure. [Industrial Applicability]

[0019] The air compressor structure of the present invention can be applied to industrial equipment related to air compression. [Explanation of symbols]

[0020] 100 Air compressor structure 110 cylinders 120 Cylinder cover 121 Cover body 122 Career 122a Air storage chamber Containment Cell 122b 122c stud 122d aperture 122e Exhaust port 123 Exhaust port 123a aperture 130 piston 140 Transmission Mechanism 150 motor 160 Pressure Gauge 161 Propulsion tube 161a Gear Rack 161b Notch 162 Dial 163 Guidelines 163a Rotation axis 163b Pointer section 163c gear 164 Spring 165 Adjustment member 165a Cover body 165b shaft body 165c female thread 166 Seal ring D1 Outer diameter D2 inner diameter W1 Inner wall XYZ Cartesian coordinates

Claims

1. A cylinder and a piston coupled within the cylinder for reciprocating movement to generate compressed air; a cylinder cover assembled to the cylinder to receive the compressed air; a pressure gauge; The pressure gauge a propelling cylinder movably installed in the cylinder cover and having a gear rack; A dial installed on the surface of the cylinder cover; a pointer having a pointer portion and a rotation shaft, the rotation shaft being installed on the cylinder cover, the rotation shaft having a gear and coupled to the gear rack, the pointer portion extending from the rotation shaft and positioned on the dial; a spring disposed within the cylinder cover and in contact with the propellant tube; The compressed air provides a driving force to the propellant tube, causing the propellant tube to move within the cylinder cover, deforming the spring to generate elastic force; the moving propellant tube couples the gear rack and the gear to move the pointer portion of the pointer on the dial; and when the balance between the driving force and the elastic force is maintained, the propellant tube stops moving, reflecting the pressure value of the compressed air; the pressure gauge further includes an adjustment member; The adjustment member is movably mounted on the cylinder cover, and the spring is abutted between the adjustment member and the propelling tube. Air compressor structure.

2. 2. The air compressor structure according to claim 1, wherein the adjustment member includes a cover body and a shaft body, the cover body is movably screwed to the cylinder cover, the spring is abutted between the cover body and the propelling tube, the shaft body extends from the cover body and into the cylinder cover, and the spring is sleeve-connected to the shaft body.

3. 3. The air compressor structure according to claim 2, wherein the outer diameter of the shaft body is smaller than the inner diameter of the propelling tube, so that the propelling tube can be sleeve-connected to the shaft body when driven to move by the compressed air.

4. 3. The air compressor structure according to claim 2, wherein the cylinder cover has a housing chamber and an air storage chamber that are connected to each other, the air storage chamber receives the compressed air, and the propellant tube, a portion of the pointer, the spring, and the shaft body are installed in the housing chamber.

5. 2. The air compressor structure according to claim 1, wherein the propellant tube has a notch, the gear rack is located on one side of the notch, and the rotating shaft passes through the notch and the propellant tube.

6. the pressure gauge further includes a seal ring; The seal ring is sleeve-connected to the propellant tube and abuts against the inner wall of the cylinder cover; 2. The air compressor structure of claim 1, wherein the seal ring moves within the cylinder cover together with the propellant barrel.

7. the cylinder cover has a pressure relief port communicating with the external environment; 7. The air compressor structure according to claim 6, wherein the exhaust port is located on a moving path of the seal ring, and when the seal ring reaches the exhaust port, the compressed air is discharged from the air compressor structure through the exhaust port.

8. 2. The air compressor structure according to claim 1, wherein the pointer is driven by the rotary shaft to rotate on the dial, and the dial is arranged on the surface of the cylinder cover in one of a plurality of different identification directions.

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