Air compressor structure

Abstract

The invention provides an air compressor structure which comprises a cylinder, a piston, a cylinder cover and a pressure gauge. The piston is coupled in the cylinder and reciprocates to generate compressed air. The cylinder cover is assembled on the cylinder to receive compressed air. The pressure gauge comprises a propelling cylinder, a numerical value disc, a pointer and a spring. The propelling barrel is movably arranged in the cylinder cover and provided with a rack. The numerical disc is arranged on the surface of the cylinder cover. The pointer is provided with a pointing part and a pivot, and the pivot is arranged on the cylinder cover and provided with a gear to be coupled to the rack. The pointing part extends from the pivot shaft and is located on the numerical value disc. The spring is arranged in the cylinder cover and abuts against the propelling barrel.

Description

Technical Field

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

[0002] Existing small air compressors used for inflating items such as automobile tires and air cushions have only two outlet manifolds (ducts) provided on the air storage seat of the machine body. One is used to install a round box-shaped pressure gauge, and the other is used to connect a hose with a nozzle at one end. The nozzle is connected to the item to be inflated, such as an automobile tire. Compressed air generated by the operation of the air compressor is transported to the item to be inflated to achieve the purpose of inflation. The pressure gauge allows the user to visually observe the current pressure value as a basis for the safety of controlling the inflation operation.

[0003] The above-mentioned pressure display gauges are mostly mechanical pointer-type pressure gauges based on the Bourdon tube principle. However, such pressure gauges require more precision components, and the precision components are also prone to damage, resulting in loss of accuracy during measurement. Therefore, the use efficiency of such pressure gauges is not good. Summary of the Invention

[0004] The present invention is directed to an air compressor structure that simplifies the structure of the pressure gauge and takes into account durability.

[0005] According to an embodiment of the present invention, the air compressor structure includes a cylinder, a piston, a cylinder head, and a pressure gauge. The piston is coupled to the cylinder and reciprocates to generate compressed air. The cylinder head is assembled to the cylinder to receive the compressed air. The pressure gauge includes a push cylinder, a numerical disk, a pointer, and a spring. The push cylinder is movably disposed within the cylinder head. The push cylinder has a rack. The numerical disk is disposed on the surface of the cylinder head. The pointer has a pointing portion and a pivot. The pivot is disposed on the cylinder head and has a gear to be coupled to the rack. The pointing portion extends from the pivot and is located on the numerical disk. The spring is disposed within the cylinder head and abuts against the push cylinder. Compressed air provides a driving force to the push cylinder, causing the push cylinder to move within the cylinder head and deform the spring to generate an elastic force. The moving push cylinder rotates the gear through the rack, causing the pointing portion of the pointer to rotate on the numerical disk until the driving force and the elastic force reach equilibrium. After the push cylinder stops moving and the gear of the pointer stops rotating, the scale at the position where the pointing portion of the pointer stops reflects the pressure value of the compressed air.

[0006] Based on the above, the pressure gauge of the air compressor structure is set on the cylinder head so that the compressed air generated by the reciprocating movement of the piston in the cylinder can directly enter the cylinder head and the pressure value of the compressed air can be reflected in real time through the pressure gauge. The pressure gauge includes a propulsion cylinder, a numerical dial, a pointer and a spring. Among them, the compressed air provides driving force to the propulsion cylinder to make the propulsion cylinder move in the cylinder head. The moving propulsion cylinder is matched with the rack and the gear of the pointer, so that the linear motion of the propulsion cylinder can be converted into the rotational motion of the pointer. At the same time, the linear motion of the propulsion cylinder will cause deformation to the spring abutted thereon to generate elastic force. Until the elastic force and the driving force reach equilibrium, the propulsion cylinder stops moving and the pointer at this time points to the numerical dial to reflect the pressure value of the compressed air. Accordingly, compared with the prior art, the pressure gauge obviously has the effect of simplifying components, and the connection and cooperation between components are intuitive and do not require complex design. Therefore, it can effectively achieve the purpose of pressure sensing under the condition of a simple and compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a schematic diagram of the air compressor structure according to an embodiment of the present invention;

[0008] Figure 2 is Figure 1 an exploded schematic diagram of the air compressor structure of

[0009] Figure 3 is an exploded schematic diagram of the components of the cylinder head;

[0010] Figure 4 is a partial cross-sectional view of the cylinder head;

[0011] Figure 5A is a partial cross-sectional view of the cylinder head and the pressure gauge;

[0012] Figure 5B shows Figure 5A another state of the pressure gauge of

[0013] Figures 6A to 6C schematic diagrams showing the numerical dial configured on the cylinder head with different identification orientations. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] Now, reference will be made in detail to the exemplary embodiments of the present invention. Examples of the exemplary embodiments are illustrated in the drawings. Whenever possible, the same component symbols are used in the drawings and the description to represent the same or similar parts.

[0015] Figure 1 is a schematic diagram of the air compressor structure according to an embodiment of the present invention. Figure 2 is Figure 1 an exploded schematic diagram of the air compressor structure of. Here, a rectangular coordinate X-Y-Z is provided to facilitate the description of the components. Please refer to Figure 1 and Figure 2, in this embodiment, the air compressor structure 100 includes a cylinder 110, a cylinder head 120, a piston 130, a transmission mechanism 140, a motor 150, and a pressure gauge 160. The cylinder head 120 is assembled to the cylinder 110. The transmission mechanism 140 is connected between the motor 150 and the bottom end of the piston 130, and the top end of the piston 130 is movably coupled within the cylinder 110 so that the motor 150 drives the piston 130 to reciprocate within the cylinder 110 through the transmission mechanism 140 (such as the gear set shown in the figure) to generate compressed air. Wherein, the top end of the piston 130 moves closer to or away from the cylinder head 120 with the reciprocating motion. When the piston 130 advances to compress the air, it also simultaneously moves its top end towards the cylinder head 120 and squeezes the compressed air from the cylinder 110 towards the cylinder head 120. When the piston 130 returns and resets, the top end of the piston 130 moves away from the cylinder head 120, and the air in the external environment flows into the cylinder 110. The cylinder head 120 has an air outlet 123. After the piston 130 generates compressed air within the cylinder 110, the compressed air is squeezed into the cylinder head 120 by the piston 130 as described above, and then discharged from the air outlet 123 out of the air compressor structure 100.

[0016] As Figure 2 shown, the cylinder head 120 presents an integral structure feature in terms of structure, which is divided into a cover body 121, a carrier 122, and the aforementioned air outlet 123. Wherein, after the compressed air enters the cover body 121 of the cylinder head 120 from the cylinder 110, it enters the air storage chamber 122a of the carrier 122, and finally is discharged from the air outlet 123 out of the cylinder head 120.

[0017] Figure 3 is a schematic diagram of the component decomposition of the cylinder head. Figure 4 is a partial cross-sectional view of the cylinder head. Figure 5A is a partial cross-sectional view of the cylinder head and the pressure gauge. Please also refer to Figure 3 , Figure 4 and Figure 5A , in this embodiment, the air outlet 123 extends into the air storage chamber 122a to form an opening 123a. Therefore, after the aforementioned compressed air enters the air storage chamber 122a of the carrier 122 through the cover body 121, it can be discharged from the carrier 122 through the opening 123a and the air outlet 123.

[0018] Furthermore, the carrier 122 also has a receiving chamber 122b, which is separated from the air storage chamber 122a but communicates with each other via an opening 122d. The pressure gauge 160 includes a push cylinder 161, a numerical (scale) disk 162, a pointer 163, a spring 164, and an adjusting member 165. The push cylinder 161 is movably disposed in the receiving chamber 122b of the cylinder head 120, and the push cylinder 161 has a notch 161b and a rack 161a located at the side edge of the notch 161b. The numerical disk 162 is disposed on the surface of the cylinder head 120. The pointer 163 has a pointing portion 163b and a pivot 163a. The pivot 163a is disposed on the cylinder head 120 and passes through the push cylinder 161 and its notch 161b. A gear 163c is provided outside the pivot 163a to be coupled to the rack 161a located on one side of the notch 161b. The pointing portion 163b extends from the pivot 163a and is located on the numerical disk 162. The compressed air in the air storage chamber 122a of the cylinder head 120 enters the receiving chamber 122b via the opening 122d to drive the push cylinder 161 to move in the positive Z-axis direction, and the gear of the pointer 163 is rotated by the rack 161a to move the pointing portion 163b of the pointer 163 on the numerical disk 162 (rotate relative to the X-axis). When the driving force of the compressed air and the elastic force of the spring 164 reach equilibrium, the gear of the pointer stops rotating, and the scale at the position where the pointing portion 163b of the pointer 163 stops immediately reflects the pressure value of the compressed air.

[0019] Figure 5B Shows Figure 5A Another state of the pressure gauge shown. Please also refer to Figure 5A And Figure 5B In this embodiment, the spring 164 is located in the receiving chamber 122b and abuts against the push cylinder 161 to resist the driving force exerted on the push cylinder 161 by the compressed air, and the adjusting member 165 is movably assembled on the cylinder head 120, and the spring 164 abuts between the adjusting member 165 and the push cylinder 161. Further, the adjusting member 165 includes a cover body 165a and a shaft body 165b. The cover body 165a has an internal thread 165c to be movably screwed onto a stud 122c extending and protruding from the carrier 122 of the cylinder head 120 to close the receiving chamber 122b. The spring 164 abuts between the cover body 165a and the push cylinder 161. The shaft body 165b extends from the cover body 165a and extends into the receiving chamber 122b of the cylinder head 120, and the spring 164 is sleeved on the shaft body 165b. Furthermore, the outer diameter D1 of the shaft body 165b in this embodiment is smaller than the inner diameter D2 of the push cylinder 161, so that the push cylinder 161 can be sleeved on the shaft body 165b when it is driven by the compressed air to move in the positive Z-axis direction.

[0020] In this way, the designer selects an appropriate spring 164 according to the correspondence between the rack 161a and the gear 163c, and fine-tunes the deformation of the spring 164 in combination with the cover 165a and the stud 122c, so that the pressure of the compressed air applied to the propulsion cylinder 161 can drive the pointer 163 to point to the corresponding pressure value in real time and without error.

[0021] In addition, the pressure gauge 160 of this embodiment further includes a sealing ring 166, which is sleeved on the propulsion cylinder 161 and abuts against the inner wall W1 of the accommodation chamber 122b of the cylinder head 120. The sealing ring 166 moves with the propulsion cylinder 161 in the accommodation chamber 122b. Furthermore, the carrier 122 of the cylinder head 120 has a pressure relief port 122e to communicate the external environment with the accommodation chamber 122b, and the pressure relief port 122e is located on the movement path of the sealing ring 166. When the sealing ring 166 reaches the pressure relief port 122e, the compressed air originally entering the accommodation chamber 122b to push the propulsion cylinder 161 can be discharged from the air compressor structure 100 through the pressure relief port 122e. This is to provide an extreme value limiting effect on the pressure gauge 160, so as to discharge excessive air pressure when the working air pressure is about to exceed the safe operating value, in order to protect the entire air compressor components, the object to be inflated, and the operator from damage.

[0022] Figures 6A to 6C Schematic diagrams showing the numerical dials arranged on the cylinder head in different identification orientations. Please also refer to Figures 6A to 6C In this embodiment, since the pointer 163 (the pointing portion 163b thereof) rotates relative to the X-axis on the numerical dial 162 due to the drive of the pivot 163a, in order to facilitate the operation and identification habits of the user, the numerical dials 1621, 1622, 1623 are arranged on the surface of the carrier 122 of the cylinder head 120 in a variety of different identification orientations for the user to choose.

[0023] To sum up, in the above embodiments of the present invention, the pressure gauge of the air compressor structure is arranged on the cylinder head, so that the compressed air generated by the reciprocating movement of the piston in the cylinder can directly enter the cylinder head and the pressure value of the compressed air can be reflected in real time through the pressure gauge. The pressure gauge includes a propulsion cylinder, a numerical dial, a pointer and a spring. Among them, after the propulsion cylinder bears the driving force of the compressed air, it moves in the cylinder head, and the rack of the propulsion cylinder rotates the gear of the pointer, so that the linear motion of the propulsion cylinder can be converted into the rotational motion of the pointer. At the same time, the linear motion of the propulsion cylinder will cause the spring abutting thereon to deform and generate elastic force. When the elastic force is balanced with the driving force, the propulsion cylinder stops moving and the scale at the position where the pointer points to the numerical dial at that time reflects the pressure value of the compressed air.

[0024] Furthermore, the pressure gauge further includes an adjustment member, wherein the spring abuts between the adjustment member and the propulsion cylinder. Therefore, through the characteristic selection and matching of the rack and the gear by the designer, combined with the elastic matching of the spring and the control of the spring deformation by the adjustment member, the pressure value of the compressed air can be accurately reflected on the numerical dial through the pointer in real time. On the contrary, for pistons and cylinders with different compression capabilities, the selection of the above components can also reflect the adaptability to compressed air accordingly.

[0025] Accordingly, compared with the prior art, the pressure gauge significantly has the effect of simplifying components, and the connection and cooperation between components are intuitive without complex design. Therefore, it can effectively achieve the purpose of pressure sensing while taking into account the simplified and compact structure.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An air compressor structure, characterized in that, Comprising: A cylinder; A piston, coupled within the cylinder and reciprocating to generate compressed air; A cylinder head, assembled to the cylinder to receive the compressed air; And A pressure gauge, comprising: A push cylinder, movably disposed within the cylinder head, the push cylinder having a rack; A numerical dial, disposed on the surface of the cylinder head; and A pointer, having a pointing portion and a pivot, the pivot being disposed on the cylinder head, the pivot having a gear to be coupled to the rack, the pointing portion extending from the pivot and located on the numerical dial; and A spring, disposed within the cylinder head and abutting against the push cylinder, the compressed air providing a driving force to the push cylinder to cause the push cylinder to move within the cylinder head and deform the spring to generate an elastic force, the moving push cylinder rotates the gear through the rack to cause the pointing portion of the pointer to rotate on the numerical dial until the driving force and the elastic force reach equilibrium, the push cylinder stops moving, after the gear of the pointer stops rotating, the scale at the position where the pointing portion of the pointer stops immediately reflects the pressure value of the compressed air.

2. The air compressor structure according to claim 1, wherein, The pressure gauge further includes an adjusting member, movably assembled to the cylinder head, the spring abutting between the adjusting member and the push cylinder.

3. The air compressor structure according to claim 2, wherein The adjusting member includes a cover body and a shaft body, the cover body is movably screwed to the cylinder head, the spring abuts between the cover body and the push cylinder, the shaft body extends from the cover body and extends into the cylinder head, the spring is sleeved on the shaft body.

4. The air compressor structure according to claim 3, wherein The outer diameter of the shaft body is smaller than the inner diameter of the push cylinder, so that the push cylinder can be sleeved on the shaft body when driven by the compressed air to move.

5. The air compressor structure according to claim 3, characterized in that, The cylinder head has a receiving chamber and a gas storage chamber communicating with each other, the gas storage chamber receives the compressed air, the push cylinder, a part of the pointer, the spring and the shaft body are disposed in the receiving chamber.

6. The air compressor structure according to claim 1, characterized in that, The push cylinder has a notch, the rack is located on one side of the notch, the pivot penetrates through the notch to be coupled to the rack.

7. The air compressor structure according to claim 1, characterized in that, The pressure gauge further includes a sealing ring, sleeved on the push cylinder and abutting against the inner wall of the cylinder head, the sealing ring moves within the cylinder head along with the push cylinder.

8. The air compressor structure according to claim 7, wherein, The cylinder head has a pressure relief port communicating with the external environment, located on the movement path of the sealing ring, so that when the sealing ring reaches the pressure relief port, the compressed air is discharged from the air compressor structure through the pressure relief port.

9. The air compressor structure according to claim 1, characterized in that, The pointer rotates on the numerical dial due to the drive of the pivot, and the numerical dial is selectively disposed on the surface of the cylinder head from a plurality of different identification orientations.

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