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. The switch assembly comprises a main shell, a switch main body accommodated in the main shell and an overcurrent protector electrically connected to the switch main body, and the switch assembly is electrically connected to the driving assembly; an over-current protector shell is arranged on the periphery of the over-current protector, and the over-current protector shell is detachably connected to the main shell; and when the over-current protector needs to be replaced, the over-current protector can be replaced only by dismounting the over-current protector shell, so that the over-current protector is convenient and rapid.

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] Generally, the motor of the air compressor is equipped with an overcurrent protector. When the operating current is too large and the temperature is higher than 135°, the power is automatically cut off to prevent the motor from burning. Although this device can protect the motor, the motor is always in a load state before it is triggered, which is easy to damage the motor; and it takes a long time for the motor temperature to be lower than 135° to resume normal operation, which affects work efficiency.

[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 of the prior art, the purpose of the utility model is to provide an air compressor with an improved switch assembly, the switch assembly of the air compressor can be used to replace the overcurrent protector conveniently and quickly.

[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 a main housing, a switch body accommodated in the main housing, and an overcurrent protector electrically connected to the switch body, the switch assembly being electrically connected to the drive assembly; an overcurrent protector housing is provided on the periphery of the overcurrent protector, and the overcurrent protector housing is detachably connected to the main housing.

[0007] A further improved solution is: a hook groove is provided at the rear end of the main shell, and a hook is provided at the front end of the overcurrent protector shell, and the hook is held in the hook groove.

[0008] A further improved solution is: the main shell protrudes outward from the rear end to form a supporting portion, and the lower end of the overcurrent protector shell is connected to the upper end of the supporting portion.

[0009] A further improvement is as follows: screw holes are provided at the rear ends of the support portion and the overcurrent protector housing, and screws are installed in the screw holes to fix the two.

[0010] A further improved solution is: the main shell includes a accommodating portion located at the upper end, the switch assembly includes a shift block located at the lower end of the accommodating portion and a knob connected to the shift block, the lower end of the knob is located in the accommodating portion and the knob can rotate in the accommodating portion.

[0011] A further improved solution is: the lower end of the knob protrudes to form a protrusion, the upper end of the shift block is recessed downward to form a groove, and the protrusion is inserted into the groove so that the shift block rotates with the rotation of the knob.

[0012] A further improved solution is: a trigger block is provided at the upper end of the switch body, and the trigger block is located at the lower end of the shift block; as the shift block rotates, the shift block presses the trigger block downward or pops the trigger block upward.

[0013] A further improvement is that the shift block protrudes toward the lower end to form a plane and an inclined surface. When the plane is located at the upper end of the trigger block, the trigger block is pressed downward and the air compressor does not work; when the inclined surface is located at the upper end of the trigger block, the trigger block is popped upward and the air compressor works.

[0014] A further improved solution is: a through hole is provided at the upper end of the overcurrent protector housing, and the upper end of the overcurrent protector includes a threaded portion, and the threaded portion passes through the through hole from bottom to top.

[0015] A further improved solution is: the overcurrent protector includes a nut, which is screwed on the threaded portion and is located at the upper end of the overcurrent protector housing to connect the overcurrent protector to the overcurrent protector housing.

[0016] Compared with the prior art, the utility model has the following beneficial effects: an overcurrent protector shell is provided on the outer periphery of the overcurrent protector, and the overcurrent protector shell is detachably connected to the main shell; when the overcurrent protector needs to be replaced, it can be replaced by simply removing the overcurrent protector shell, which is convenient and quick. [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 2 A cross-sectional view of a switch assembly of an air compressor is 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] Main housing 50 hook groove 501

[0027] Supporting portion 502 Accommodating portion 503

[0028] Switch body 51 Trigger block 511

[0029] Wiring port 512 Overcurrent protector 52

[0030] Threaded portion 521 Nut 522

[0031] Overcurrent protector housing 53 hook 531

[0032] Screw hole 532 Screw 533

[0033] Through hole 534 Knob 54

[0034] Protrusion 541 Dial block 55

[0035] Groove 551 Flat surface 552

[0036] Incline 553 Handle 6

[0037] Roller 7 Power cord 8 [Specific implementation method]

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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 .

[0043] See also Figures 2 to 4 As shown, the switch assembly 5 includes a main housing 50, a switch body 51 accommodated in the main housing 50, and an overcurrent protector 52 electrically connected to the switch body 51. The outer cover of the overcurrent protector 52 is provided with an overcurrent protector housing 53, and the overcurrent protector housing 53 is detachably connected to the main housing 50; 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; when the overcurrent protector 52 needs to be replaced, it only needs to remove the overcurrent protector housing 53 for replacement, which is convenient and quick.

[0044] A wiring port 512 is disposed at the lower end of the switch body 51 , and one end of the power line 8 is connected to the switch body 51 through the wiring port 512 .

[0045] Furthermore, a hook groove 501 is provided at the rear end of the main shell 50, and a hook 531 is provided at the front end of the overcurrent protector shell 53. The hook 531 is clamped in the hook groove 501 to connect the overcurrent protector shell 53 to the main shell 50 more firmly.

[0046] The main shell 50 protrudes outward from the rear end to form a support portion 502, and the lower end of the overcurrent protector shell 53 is attached to the upper end of the support portion 502; the support portion 502 and the rear end of the overcurrent protector shell 53 are provided with screw holes 532, and screws 533 are installed in the screw holes 532 to fasten the two together.

[0047] A through hole 534 is provided at the upper end of the overcurrent protector housing 53, and the upper end of the overcurrent protector 52 includes a threaded portion 521, which passes through the through hole 534 from bottom to top, that is, the upper end of the threaded portion 521 is located above the through hole 534 after installation.

[0048] Furthermore, the overcurrent protector 52 includes a nut 522 that can be screwed on the threaded portion 521. After the threaded portion 521 passes through the through hole 534, the nut 522 is screwed into the threaded portion 521 to fix the overcurrent protector 52 to the overcurrent protector housing 53. This installation method is simple and quick.

[0049] The main housing 50 includes a receiving portion 503 at the upper end, and the switch assembly 5 includes a shift block 55 at the lower end of the receiving portion 503 and a knob 54 snapped to the shift block 55 , the lower end of the knob 54 is located in the receiving portion 503 , and the knob 54 can rotate in the receiving portion 503 .

[0050] The upper end of the switch body 51 includes a trigger block 511, and the trigger block 511 is located at the lower end of the dial block 55. Pressing the trigger block 511 can control the start and stop of the air compressor 100; when the trigger block 511 pops up, the motor assembly starts and the air compressor 100 runs normally; when the trigger block 511 is pressed downward, the motor assembly stops and the air compressor 100 stops working.

[0051] The lower end of the knob 54 protrudes to form a protrusion 541 , and the upper end of the shift block 55 is recessed downward to form a groove 551 . The protrusion 541 is inserted into the groove 551 so that the shift block 55 rotates with the rotation of the knob 54 .

[0052] Furthermore, the shift block 55 protrudes toward the lower end to form a plane 552 and an inclined surface 553. As the shift block 55 rotates, the plane 552 and the inclined surface 553 will alternately pass over the top of the trigger block 511. When the air compressor 100 is in a stopped state, the plane 552 is located above the trigger block 511, and the trigger block 511 is pressed downward. At this time, the knob 54 is rotated to drive the shift block 55 to rotate, and the plane 552 gradually disengages from the top of the trigger block 511, and the inclined surface 553 gradually rotates to the top of the trigger block 511. When the inclined surface 553 is located above the trigger block 511, the trigger block 511 pops up, and the air compressor 100 starts to run.

[0053] In this embodiment, an overcurrent protector shell 53 is provided on the outer periphery of the overcurrent protector 52, and the overcurrent protector shell 53 is detachably connected to the main shell 50; when the overcurrent protector 52 needs to be replaced, it can be replaced by simply removing the overcurrent protector shell 53, which is convenient and quick.

[0054] 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 a main housing, a switch body accommodated in the main housing, and an overcurrent protector electrically connected to the switch body, and the switch assembly is electrically connected to the drive assembly; characterized in that: An overcurrent protector housing is disposed on the outer periphery of the overcurrent protector, and the overcurrent protector housing is detachably connected to the main housing.

2. The air compressor according to claim 1, characterized in that: The rear end of the main shell is provided with a hook groove, and the front end of the overcurrent protector shell is provided with a hook, and the hook is held in the hook groove.

3. The air compressor according to claim 1, characterized in that: The main shell protrudes outward from the rear end to form a supporting portion, and the lower end of the overcurrent protector shell is connected to the upper end of the supporting portion.

4. The air compressor according to claim 3, characterized in that: The support portion and the rear end of the overcurrent protector housing are provided with screw holes, and screws are installed in the screw holes to fix the two.

5. The air compressor according to claim 1, characterized in that: The main housing includes a receiving portion at the upper end, the switch assembly includes a shift block at the lower end of the receiving portion and a knob connected to the shift block, the lower end of the knob is located in the receiving portion and the knob can rotate in the receiving portion.

6. The air compressor according to claim 5, characterized in that: The lower end of the knob protrudes to form a protrusion, the upper end of the shift block is recessed downward to form a groove, and the protrusion is inserted into the groove so that the shift block rotates with the rotation of the knob.

7. The air compressor according to claim 6, characterized in that: A trigger block is disposed at the upper end of the switch body, and the trigger block is located at the lower end of the shift block; as the shift block rotates, the shift block presses the trigger block downward or pops the trigger block upward.

8. The air compressor according to claim 7, characterized in that: The shift block protrudes toward the lower end to form a plane and an inclined surface. When the plane is located at the upper end of the trigger block, the trigger block is pressed downward and the air compressor does not work; when the inclined surface is located at the upper end of the trigger block, the trigger block is ejected upward and the air compressor works.

9. The air compressor according to claim 1, characterized in that: A through hole is provided at the upper end of the overcurrent protector housing, and the upper end of the overcurrent protector includes a threaded portion, and the threaded portion passes through the through hole from bottom to top.

10. The air compressor according to claim 9, characterized in that: The overcurrent protector includes a nut which is screwed onto the threaded portion and is located at an upper end of the overcurrent protector housing to connect the overcurrent protector to the overcurrent protector housing.

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