Air compressor

Abstract

An air compressor comprises an air storage tank, an air cylinder assembly fixed to the upper portion of the air storage tank, a driving assembly contained in the air cylinder assembly and a switch assembly located at the end of the air cylinder assembly and connected with the air storage tank, and the switch assembly comprises an upper cover, a lower cover and a pressure switch installed on the upper cover, the pressure switch controls the start and stop of the air compressor; the switch assembly comprises a displayer and an overcurrent protector which are installed on the upper cover, the displayer displays parameters such as input voltage of the air compressor, and the overcurrent protector is electrically connected to the switch assembly. The switch assembly comprises a displayer and an over-current protector which are installed on the upper cover, the displayer displays parameters such as input voltage of the air compressor, and the over-current protector is electrically connected to the switch assembly. According to the arrangement, the over-current protector and the display are simultaneously installed on the upper cover, the assembly process is simplified, and a user can conveniently watch the display; meanwhile, the knob type pressure switch is convenient for a user to operate.

Description

[Technical field]

[0001] The utility model relates to the technical field of air compressors, in particular to an air compressor with an improved switch assembly. [Background Technology]

[0002] An air compressor is an industrial equipment that compresses gas. It is a device that converts mechanical energy into gas pressure energy. Air compressors are widely used in machinery, medical, food, automobile, chemical and building materials industries. The common piston compressors in our daily life include a gas storage tank, a motor installed on the gas storage tank, a drive mechanism driven by the motor and an exhaust pipe for transmitting gas. The motor drives the piston of the drive mechanism to make reciprocating linear motion in the cylinder, thereby performing suction and exhaust actions.

[0003] The existing air compressor installs an overcurrent protector on the switch assembly to protect the motor, and installs a voltage display screen on the capacitor box or the solenoid valve to display the input voltage of the air compressor. The switch assembly and the voltage display screen need to be assembled on two parts, which is cumbersome to assemble and inconvenient for users to watch.

[0004] In view of this, it is indeed necessary to provide an improved air compressor to overcome the defects of the prior art. [Contents of the utility model]

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an air compressor with an improved switch assembly, on which an overcurrent protector and a display can be installed at the same time.

[0006] The utility model adopts the following technical solution to solve the problems of the prior art: an air compressor, comprising an air tank, a cylinder assembly fixed above the air tank, a drive assembly accommodated in the cylinder assembly, and a switch assembly located at the end of the cylinder assembly and connected to the air tank, the switch assembly comprising an upper cover and a lower cover covering each other and a pressure switch installed on the upper cover, the pressure switch controls the start and stop of the air compressor; the switch assembly comprises a display and an overcurrent protector installed on the upper cover, the display displays parameters such as the input voltage of the air compressor, and the overcurrent protector is electrically connected to the switch assembly.

[0007] A further improved solution is: the display, the pressure switch and the overcurrent protector are located on the same end surface of the upper cover, and the pressure switch is located between the display and the overcurrent protector.

[0008] A further improvement is as follows: the pressure switch is a knob-type switch, one overcurrent protector corresponds to one cylinder assembly, two overcurrent protectors are provided, and two groups of cylinder assemblies are provided.

[0009] A further improved solution is: the lower end of the upper cover includes a plurality of wire clamping grooves, and the wire clamping groove is located at one of the left and right ends of the upper cover.

[0010] A further improved solution is: the switch assembly includes a switch body connected to the upper cover and the lower cover, the switch body is at least partially accommodated in the lower cover, and the overcurrent protector is electrically connected to the switch body.

[0011] A further improved solution is that the lead-out wires of the display are clamped in the clamping wire slot and electrically connected to the switch body.

[0012] A further improved solution is: the upper end of the lower cover includes a connecting rod connecting the left and right ends of the lower cover, the upper end of the connecting rod abuts against the lower end of the upper cover and the lower end of the connecting rod abuts against the upper end of the switch body.

[0013] A further improved solution is: the switch assembly includes a screw hole that penetrates the upper cover and the connecting rod and passes through the upper end of the switch body, and the projection of the center of the screw hole in the up and down directions is located on the same straight line.

[0014] A further improved solution is: the switch assembly includes a screw that is screwed into the screw hole to connect the upper cover, the lower cover and the switch body.

[0015] A further improved solution is that the upper cover and the lower cover are integrally injection molded from plastic.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the switch assembly includes a display and an overcurrent protector installed on the upper cover, the display displays the input voltage and other parameters of the air compressor, and the overcurrent protector is electrically connected to the switch assembly. In this way, the overcurrent protector and the display are installed on the upper cover at the same time, which simplifies the assembly process and makes it convenient for users to watch the display; at the same time, the knob-type pressure switch is easy for users to operate. [Drawings]

[0017] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings:

[0018] Figure 1 It is a three-dimensional schematic diagram of the air compressor of the utility model;

[0019] Figure 2 yes Figure 1 A three-dimensional schematic diagram of a switch assembly of an air compressor shown;

[0020] Figure 3 yes Figure 2 An exploded view of a switch assembly of an air compressor is shown;

[0021] Figure 4 yes Figure 3 A three-dimensional schematic diagram of the upper cover of the air compressor shown.

[0022] Meaning of the reference numerals in the figures:

[0023] Air compressor 100 Air tank 1

[0024] Cylinder assembly 2 Muffler 3

[0025] Capacitor box 4 Switch assembly 5

[0026] Upper cover 50 Accommodating cavity 501

[0027] Wire slot 502 Screw hole 503

[0028] Screw 504 Lower cover 51

[0029] Connecting rod 511 Switch body 52

[0030] Display 53 Overcurrent protector 54

[0031] Pressure switch 55 Handle 6

[0032] Roller 7 Power cord 8 [Specific implementation method]

[0033] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. For example, the words "upper", "lower", "front", "back", etc., which indicate the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0034] See also Figures 1 to 4 The utility model is shown as an air compressor 100, which includes a cylindrical gas tank 1, a motor assembly (not shown) fixed above the gas tank 1, a pair of cylinder assemblies 2 connected to both ends of the motor assembly, a driving assembly (not shown) accommodated in the pair of cylinder assemblies 2, a silencer 3 connected to the pair of cylinder assemblies 2, a capacitor box 4 fixed to the outer periphery of the gas tank 1, a switch assembly 5 located above the gas tank 1, a handle 6 installed on the gas tank 1, a roller 7 installed below the gas tank 1 and a power cord 8 electrically connected to one end of the switch assembly 5.

[0035] The motor assembly drives the driving assembly to reciprocate in a pair of the cylinder assemblies 2, and external gas is sucked in from the silencer 3 and stored in the gas storage tank 1 after being compressed; the handle 6 is located in front of the pair of cylinder assemblies 2, and by lifting and pulling the handle 6, the air compressor 100 can be moved to different work places with the assistance of the roller 7, which is convenient and quick; the power cord 8 is connected to an external power supply to provide power supply to the air compressor 100.

[0036] The capacitor box 4 is arranged adjacent to the motor assembly to facilitate electrical connection between the two; a capacitor (not shown) is installed inside the capacitor box 4, and the capacitor can stabilize power output, store electrical energy, and eliminate irregular fluctuations in the power supply, thereby providing a strong guarantee for the normal operation of the air compressor 100.

[0037] The switch assembly 5 is located in front of the cylinder assembly 2 and behind the handle 6 . The other end of the switch assembly 5 is electrically connected to the motor assembly. The switch assembly 5 is used to control the start and stop of the air compressor 100 .

[0038] See also Figures 2 to 4 As shown, the switch assembly 5 includes an upper cover 50 and a lower cover 51 covering each other and a switch body 52 accommodated in the upper cover 50 and the lower cover 51, and the switch body 52 is electrically connected to the motor assembly and the power cord 8; the upper cover 50 and the lower cover 51 are integrally injection molded by plastic material.

[0039] Furthermore, the switch assembly 5 includes a display 53 fixed to the upper cover 50 and an overcurrent protector 54 fixed to the upper cover 50; the overcurrent protector 54 is electrically connected to the switch body 52, and the overcurrent protector 52 is used to cut off the circuit when the current input to the air compressor 100 exceeds a set value, so that the motor assembly stops running to avoid damage due to overcurrent; the display 53 is electrically connected to the switch body 52, and the display 53 is used to display information such as the voltage input to the air compressor 100.

[0040] The switch assembly 5 includes a pressure switch 55 located at the upper end of the upper cover 50. The pressure switch 55 is a knob-type switch. The pressure switch 55 is rotatably connected to the switch body 52. ​​Rotating the pressure switch 55 can control the start and stop of the air compressor 100. The operation is simple and quick.

[0041] Specifically, the display 53, the overcurrent protector 54 and the pressure switch 55 are located on the same end surface of the upper cover 50, and the pressure switch 55 is located between the display 53 and the overcurrent protector 54; optionally, the display 53 may be arranged on another end surface, such as on the side end surface of the switch assembly 5.

[0042] In this embodiment, a pair of the cylinder assemblies 2 is a group of cylinder assemblies, and one overcurrent protector 54 is provided corresponding to a group of the cylinder assemblies 2; two overcurrent protectors 54 are provided, and two groups of the cylinder assemblies 2 are provided.

[0043] The front end of the upper cover 50 is recessed downward to form a receiving cavity 501, and the display 53 is placed in the receiving cavity 501. The lower end of the upper cover 50 includes a plurality of wire-gripping grooves 502, and the wire-gripping grooves 502 are located at one of the left and right ends of the upper cover 50; in this embodiment, the wire-gripping grooves 502 are located at the right end of the upper cover 50; it is conceivable that the wire-gripping grooves 502 may also be provided at the left end of the upper cover 50.

[0044] The display 53 is electrically connected to the switch body 52 via a lead wire, and the lead wire is held in the wire slot 502 to prevent the lead wire from moving in the switch assembly 5, so that it is reliably fixed in the upper cover 50 and arranged beautifully and simply.

[0045] Furthermore, the upper end of the lower cover 51 includes a connecting rod 511 connecting the left and right ends thereof, the upper end of the connecting rod 511 abuts against the lower end of the upper cover 50 and the lower end of the connecting rod 511 abuts against the upper end of the switch body 52. ​​The switch assembly 5 includes a screw hole 503 that passes through the upper cover 50 and the connecting rod 511 and through the upper end of the switch body 52, and the projection of the center of the screw hole 503 in the up-down direction is located on the same straight line.

[0046] A screw 504 is screwed into the screw hole 503 , and the screw 504 firmly connects the upper cover 50 , the lower cover 51 and the switch body 52 . The screw 504 passes through the connecting rod 511 so that the lower cover 51 can be reliably connected to the upper cover 50 and the switch body 52 .

[0047] In this embodiment, the switch assembly 5 includes a display 53 and an overcurrent protector 54 installed on the upper cover 50. The display 53 displays the input voltage and other parameters of the air compressor 100, and the overcurrent protector 54 is electrically connected to the switch assembly 5. In this configuration, the overcurrent protector 54 and the display 53 are installed on the upper cover 50 at the same time, which simplifies the assembly process and facilitates the user to watch the display 53; at the same time, the knob-type pressure switch 55 is convenient for the user to operate.

[0048] The utility model is not limited to the above specific implementations. Those skilled in the art can easily understand that there are many alternatives to the air compressor of the utility model without departing from the principle and scope of the utility model. The protection scope of the utility model shall be based on the content of the claims.

Claims

1. An air compressor, comprising an air tank, a cylinder assembly fixed above the air tank, a drive assembly accommodated in the cylinder assembly, and a switch assembly located at the end of the cylinder assembly and connected to the air tank, wherein the switch assembly comprises an upper cover and a lower cover covering each other and a pressure switch installed on the upper cover, wherein the pressure switch controls the start and stop of the air compressor; characterized in that: The switch assembly includes a display and an overcurrent protector installed on the upper cover, the display displays the input voltage of the air compressor, and the overcurrent protector is electrically connected to the switch assembly.

2. The air compressor according to claim 1, characterized in that: The display, the pressure switch and the overcurrent protector are located on the same end surface of the upper cover, and the pressure switch is located between the display and the overcurrent protector.

3. The air compressor according to claim 2, characterized in that: The pressure switch is a knob-type switch, one overcurrent protector corresponds to one cylinder assembly, two overcurrent protectors are provided, and two groups of cylinder assemblies are provided.

4. The air compressor according to claim 1, characterized in that: The lower end of the upper cover includes a plurality of wire clamping grooves, and the wire clamping groove is located at one of the left and right ends of the upper cover.

5. The air compressor according to claim 4, characterized in that: The switch assembly includes a switch body connected to the upper cover and the lower cover, the switch body is at least partially accommodated in the lower cover, and the overcurrent protector is electrically connected to the switch body.

6. The air compressor according to claim 5, characterized in that: The lead-out wire of the display is clamped in the clamping wire slot and is electrically connected to the switch body.

7. The air compressor according to claim 5, characterized in that: The upper end of the lower cover includes a connecting rod connecting the left and right ends of the lower cover, the upper end of the connecting rod abuts against the lower end of the upper cover, and the lower end of the connecting rod abuts against the upper end of the switch body.

8. The air compressor according to claim 7, characterized in that: The switch assembly includes a screw hole that penetrates the upper cover and the connecting rod and passes through the upper end of the switch body, and the projection of the center of the screw hole in the up and down directions is located on the same straight line.

9. The air compressor according to claim 8, characterized in that: The switch assembly includes screws that are screwed into the screw holes to connect the upper cover, the lower cover and the switch body.

10. The air compressor according to claim 1, characterized in that: The upper cover and the lower cover are integrally injection-molded from plastic.

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