Air compressor structure

Abstract

The utility model 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. According to the air compressor structure provided by the utility model, the structure of the pressure gauge is simplified, and the durability is considered.

Description

Technical Field

[0001] The utility model 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) on the air reservoir. One is used to install a round box-shaped pressure gauge, and the other is used to connect to a hose with an air nozzle at one end. The air nozzle is connected to the object to be inflated, such as an automobile tire. The compressed air generated by the air compressor is delivered to the object to be inflated to achieve the purpose of inflation. The pressure gauge allows the user to visually check the current pressure value as a basis for controlling the safety of the inflation operation.

[0003] The aforementioned pressure display gauges are mostly mechanical pointer-type pressure gauges based on the Bourdon tube principle. However, such pressure gauges require a large number of precision components, and these precision components are also easily damaged, resulting in loss of measurement accuracy. Therefore, the use efficiency of such pressure gauges is not satisfactory. Utility Model Content

[0004] The utility model is directed to an air compressor structure, which simplifies the structure of a pressure gauge and takes durability into consideration.

[0005] According to an embodiment of the present invention, an 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 propulsion cylinder, a dial, a pointer, and a spring. The propulsion cylinder is movably disposed within the cylinder head and has a rack. The dial is mounted on the surface of the cylinder head. The pointer has a pointing portion and a pivot. The pivot is mounted in the cylinder head and has a gear coupled to the rack. The pointing portion extends from the pivot and is located on the dial. The spring is disposed within the cylinder head and abuts the propulsion cylinder. Compressed air provides a driving force to the propulsion cylinder, causing it to move within the cylinder head and deform the spring, generating a spring force. The moving propulsion cylinder rotates the gear via the rack, causing the pointer's pointing portion to rotate on the dial until the driving force and the spring force reach equilibrium. The propulsion cylinder stops moving, and the pointer's gear stops rotating. The scale at the position where the pointer's pointing portion stops reflects the compressed air pressure.

[0006] In the embodiment provided by the present invention, the pressure gauge further includes an adjusting member movably assembled to the cylinder head, and the spring abuts between the adjusting member and the propulsion cylinder.

[0007] In the embodiment provided by the present invention, the adjusting part 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 propulsion cylinder, the shaft body extends from the cover body and extends into the cylinder head, and the spring is sleeved on the shaft body.

[0008] In the embodiment provided by the present invention, the outer diameter of the shaft body is smaller than the inner diameter of the propulsion cylinder, so that the propulsion cylinder can be sleeved on the shaft body when it is driven by the compressed air to move.

[0009] In the embodiment provided by the present invention, the cylinder head has a receiving chamber and an air storage chamber that are connected to each other, the air storage chamber receives the compressed air, and the propulsion cylinder, a part of the pointer, the spring and the shaft are arranged in the receiving chamber.

[0010] In the embodiment provided by the present invention, the propulsion cylinder has a notch, the rack is located on one side of the notch, and the pivot is passed through the notch to couple with the rack.

[0011] In the embodiment provided by the present invention, the pressure gauge further includes a sealing ring, which is sleeved on the propulsion cylinder and abuts against the inner wall of the cylinder head, and the sealing ring moves in the cylinder head along with the propulsion cylinder.

[0012] In the embodiment provided by the present invention, the cylinder head has a pressure relief port connected to the external environment, which is 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.

[0013] In an embodiment provided by the present invention, the pointer rotates on the numerical dial due to the driving of the pivot, and the numerical dial is configured on the surface of the cylinder head in one of a plurality of different identification orientations.

[0014] Based on the above, the pressure gauge of the air compressor structure is installed in the cylinder head. This allows the compressed air generated by the reciprocating motion of the piston in the cylinder to directly enter the cylinder head and reflect the compressed air pressure value in real time through the pressure gauge. The pressure gauge includes a propeller cylinder, a dial, a pointer, and a spring. The compressed air provides the driving force for the propeller cylinder to move within the cylinder head. The moving propeller cylinder is coupled with a rack and a gear of the pointer, which converts the linear motion of the cylinder into the rotational motion of the pointer. Simultaneously, the linear motion of the propeller cylinder deforms the spring abutting against it, generating an elastic force. When the elastic force and the driving force reach equilibrium, the propeller cylinder stops moving, and the pointer now points to the dial, reflecting the compressed air pressure value. Consequently, the pressure gauge significantly simplifies its components compared to existing technologies. The connections between the components are intuitive and require no complex design, effectively achieving the purpose of pressure sensing while maintaining a simple and compact structure.

[0015] In order to make the above features and advantages of the present invention more clearly understood, embodiments are given below with reference to the accompanying drawings for detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of an air compressor structure according to an embodiment of the present invention;

[0017] Figure 2 yes Figure 1 Schematic diagram of the exploded structure of the air compressor;

[0018] Figure 3 It is a schematic diagram of the exploded components of the cylinder head;

[0019] Figure 4 It is a partial cross-sectional view of the cylinder head;

[0020] Figure 5A It is a partial cross-sectional view of the cylinder head and pressure gauge;

[0021] Figure 5B Show Figure 5A Another state of the pressure gauge;

[0022] Figures 6A to 6C Schematic diagram showing the numerical dial arranged on the cylinder head in different identification orientations. DETAILED DESCRIPTION

[0023] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals are used in the drawings and the description to refer to the same or like parts.

[0024] Figure 1 It is a schematic diagram of the air compressor structure according to one embodiment of the present invention. Figure 2 yes Figure 1 The exploded diagram of the air compressor structure is shown in Figure 1. Here, the rectangular coordinates XYZ are provided to facilitate the description of the components. Please also refer to Figure 1 and Figure 2In 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 to the cylinder 110, so that the motor 150 drives the piston 130 to reciprocate in the cylinder 110 through the transmission mechanism 140 (such as the gear set shown in the figure) to generate compressed air. The top end of the piston 130 moves closer to or farther away from the cylinder head 120 with the reciprocating motion. When the piston 130 moves to compress the air, its top end also moves toward the cylinder head 120 and squeezes the compressed air from the cylinder 110 to 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 air from the external environment flows into the cylinder 110. The cylinder head 120 has an air outlet 123 . After the piston 130 generates compressed air in 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 compressor structure 100 through the air outlet 123 .

[0025] like Figure 2 As shown, the cylinder head 120 has an integrated structural feature, which is divided into a cover body 121, a carrier 122 and the aforementioned air outlet 123. 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 is finally discharged from the cylinder head 120 through the air outlet 123.

[0026] Figure 3 It is a schematic diagram of the exploded components of the cylinder head. Figure 4 It is a partial cross-sectional view of the cylinder head. Figure 5A This is a partial cross-sectional view of the cylinder head and 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 compressed air enters the air storage chamber 122a of the carrier 122 through the cover 121, it can be discharged from the carrier 122 through the opening 123a and the air outlet 123.

[0027] Furthermore, the carrier 122 further includes a chamber 122b, which is separated from the air storage chamber 122a but connected to the other through an opening 122d. The pressure gauge 160 includes a propulsion cylinder 161, a numerical dial 162, a pointer 163, a spring 164, and an adjustment member 165. The propulsion cylinder 161 is movably disposed within the chamber 122b of the cylinder head 120 and has a slot 161b and a rack 161a located on the side of the slot 161b. The numerical dial 162 is mounted on the surface of the cylinder head 120. The pointer 163 has a pointing portion 163b and a pivot 163a. ​​The pivot 163a is mounted on the cylinder head 120 and passes through the propulsion cylinder 161 and its slot 161b. A gear 163c is mounted on the exterior of the pivot 163a to couple with the rack 161a located on one side of the slot 161b. Pointing portion 163b extends from pivot 163a and is located on dial 162. Compressed air within air storage chamber 122a of cylinder head 120 enters accommodating chamber 122b through opening 122d, driving propulsion cylinder 161 in the positive Z-axis direction. This, in turn, rotates gear 163c via rack 161a, causing pointing portion 163b of pointer 163 to move on dial 162 (rotate relative to the X-axis). When the driving force of the compressed air and the elastic force of spring 164 reach equilibrium, the pointer gear stops rotating, and the scale indicating the position where pointing portion 163b of pointer 163 stops reflects the compressed air pressure value.

[0028] Figure 5B Show Figure 5A Please also refer to the other state of the pressure gauge. Figure 5A and Figure 5B In this embodiment, the spring 164 is located in the accommodating chamber 122b and abuts the propulsion cylinder 161 to resist the driving force applied to the propulsion cylinder 161 by the compressed air. The adjustment member 165 is movably assembled to the cylinder head 120, and the spring 164 abuts between the adjustment member 165 and the propulsion cylinder 161. Specifically, the adjustment member 165 includes a cover 165a and a shaft 165b. The cover 165a has an internal thread 165c that is movably screwed onto a stud 122c extending from the carrier 122 of the cylinder head 120 to close the accommodating chamber 122b. The spring 164 abuts between the cover 165a and the propulsion cylinder 161. The shaft 165b extends from the cover 165a and extends into the accommodating chamber 122b of the cylinder head 120, wherein the spring 164 is sleeved on the shaft 165b. Furthermore, the outer diameter D1 of the shaft body 165b of this embodiment is smaller than the inner diameter D2 of the propulsion tube 161, so that the propulsion tube 161 can be sleeved on the shaft body 165b when driven by compressed air to move in the positive Z-axis direction.

[0029] In this way, the designer selects an appropriate spring 164 according to the corresponding relationship 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 applied by the compressed air to the propulsion cylinder 161 can drive the pointer 163 to point to the corresponding pressure value in real time and accurately.

[0030] In addition, the pressure gauge 160 of this embodiment also includes a sealing ring 166, which is mounted on the propulsion cylinder 161 and abuts the inner wall W1 of the accommodating chamber 122b of the cylinder head 120. The sealing ring 166 moves within the accommodating chamber 122b along with the propulsion cylinder 161. Furthermore, the carrier 122 of the cylinder head 120 has a pressure relief port 122e, connecting the external environment with the accommodating chamber 122b. The pressure relief port 122e is located in the movement path of the sealing ring 166. When the sealing ring 166 reaches the pressure relief port 122e, the compressed air that originally entered the accommodating chamber 122b to propel the propulsion cylinder 161 is discharged from the air compressor structure 100 through the pressure relief port 122e. This provides an extreme value limiting effect for the pressure gauge 160, venting the excess pressure when the operating pressure is about to exceed a safe operating value, thereby protecting the entire air compressor components, the inflated object, and the operator from injury.

[0031] Figures 6A to 6C Schematic diagram showing the numerical dials arranged in different identification orientations on the cylinder head. Please also refer to Figures 6A to 6C In this embodiment, since the pointer 163 (the pointing portion 163b) rotates relative to the X-axis on the numerical dial 162 due to the driving of the pivot 163a, in order to facilitate the user's operation and identification habits, the numerical dials 1621, 1622, and 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.

[0032] In summary, in the above-described embodiment of the present invention, the pressure gauge of the air compressor structure is mounted on the cylinder head. This allows the compressed air generated by the reciprocating motion of the piston within the cylinder to directly enter the cylinder head and reflect the compressed air pressure value in real time through the pressure gauge. The pressure gauge comprises a propeller, a dial, a pointer, and a spring. The propeller, under the driving force of the compressed air, moves within the cylinder head. The propeller's rack rotates the pointer's gear, converting the propeller's linear motion into the pointer's rotational motion. Simultaneously, the propeller's linear motion deforms the spring abutting against it, generating an elastic force. When the elastic force balances the driving force, the propeller stops moving, and the pointer's current position on the dial reflects the compressed air pressure value.

[0033] Furthermore, the pressure gauge also includes an adjustment element, with a spring abutting between the adjustment element and the propulsion cylinder. Therefore, designers choose the right combination of the rack and pinion characteristics, combined with the spring's elasticity and the adjustment element's control over its deformation, to ensure that the compressed air pressure value is accurately and immediately reflected on the dial via the pointer. Conversely, for pistons and cylinders with different compression capacities, the selection of these components can also reflect the compatibility of the compressed air.

[0034] Accordingly, the pressure gauge has a significantly simplified component effect compared to the prior art, and the connection between the components is intuitive and does not require a complex design, so it can effectively achieve the purpose of pressure sensing while taking into account a simplified and compact structure.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An air compressor structure, characterized in that: include: cylinder; a piston coupled to the cylinder and reciprocating to generate compressed air; a cylinder head, assembled on the cylinder to receive the compressed air; as well as Pressure gauge, including: A propulsion cylinder is movably disposed in the cylinder head, and the propulsion cylinder has a rack; a numerical dial, disposed on a surface of the cylinder head; and a pointer having a pointing portion and a pivot, wherein the pivot is disposed on the cylinder head, the pivot having a gear coupled to the rack, and the pointing portion extending from the pivot and located on the numerical dial; and A spring is disposed in the cylinder head and abuts against the propulsion cylinder. The compressed air provides a driving force to the propulsion cylinder, so that the propulsion cylinder moves in the cylinder head and deforms the spring to generate an elastic force. The moving propulsion cylinder rotates the gear through the rack to rotate the pointing portion of the pointer on the numerical dial until the driving force and the elastic force are balanced. After the propulsion cylinder stops moving and the gear of the pointer stops rotating, the scale of the position where the pointing portion of the pointer stops reflects the pressure value of the compressed air.

2. The air compressor structure according to claim 1, characterized in that: The pressure gauge further includes an adjusting member movably assembled on the cylinder cover, and the spring abuts between the adjusting member and the propulsion cylinder.

3. The air compressor structure according to claim 2, characterized in that: 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 propulsion 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, characterized in that: The outer diameter of the shaft body is smaller than the inner diameter of the propulsion cylinder, so that the propulsion cylinder can be sleeved on the shaft body when it is 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 an air storage chamber which are communicated with each other. The air storage chamber receives the compressed air. The propulsion cylinder, a part of the pointer, the spring and the shaft are arranged in the receiving chamber.

6. The air compressor structure according to claim 1, characterized in that: The propulsion cylinder has a notch, the rack is located on one side of the notch, and the pivot passes through the notch to couple with the rack.

7. The air compressor structure according to claim 1, characterized in that: The pressure gauge further comprises a sealing ring which is sleeved on the propulsion cylinder and abuts against the inner wall of the cylinder head. The sealing ring moves in the cylinder head along with the propulsion cylinder.

8. The air compressor structure according to claim 7, characterized in that: The cylinder head has a pressure relief port connected to the external environment and is located on the movement path of the sealing ring, so that when the sealing ring moves to 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 driving of the pivot, and the numerical dial is configured on the surface of the cylinder head in one of a plurality of different identification orientations.

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