阅读说明：本技术 一种电动气泵 (Electric air pump ) 是由 魏磊 于 2021-09-09 设计创作，主要内容包括：本发明公开了一种电动气泵,包括泵筒,泵筒内设有活塞,泵筒后端设有驱动活塞往复运动的驱动组件,驱动组件包括机架、双向螺轴、导轨杆、滑动件、连杆、电机、控制器,其中双向螺轴上设有左螺旋槽和右螺旋槽,右螺旋槽的螺距大于左螺旋槽的螺距。本发明能用于充气,也能用于抽气,在运行过程中不会产生震动,具有平稳、静音优点,无论是充气还是抽气,都能保证在活塞做工时低速进给产生较大的动力,在活塞空载时快速回退,提高了工作效率。(The invention discloses an electric air pump which comprises a pump barrel, wherein a piston is arranged in the pump barrel, a driving assembly for driving the piston to reciprocate is arranged at the rear end of the pump barrel, the driving assembly comprises a rack, a bidirectional screw shaft, a guide rail rod, a sliding part, a connecting rod, a motor and a controller, a left spiral groove and a right spiral groove are formed in the bidirectional screw shaft, and the pitch of the right spiral groove is larger than that of the left spiral groove. The invention can be used for inflation and air extraction, can not generate vibration in the operation process, has the advantages of stability and silence, can ensure that the piston can generate larger power by low-speed feeding during the piston manufacturing process no matter inflation or air extraction, can quickly retreat when the piston is in no-load, and improves the working efficiency.)

1. The utility model provides an electronic air pump, includes the pump barrel, and the pump barrel front end is equipped with the check valve that admits air and gives vent to anger the check valve, is equipped with the piston in the pump barrel, and the pump barrel rear end is equipped with drive piston reciprocating motion's drive assembly, characterized by: the drive assembly comprises a rack, a two-way screw shaft, a guide rail rod, a sliding piece, a connecting rod, a motor and a controller, wherein the rack is fixedly arranged at the rear outer end of the pump barrel, the two-way screw shaft is rotatably arranged in the middle of the rack, a left spiral groove and a right spiral groove are arranged on the two-way screw shaft, the pitch of the right spiral groove is greater than that of the left spiral groove, the pitch of the left spiral groove is gradually reduced from right to left, the right spiral groove is equal in pitch and is not less than that of the rightmost end of the left spiral groove, the left spiral groove and the right spiral groove are connected in a transition curve at two ends, the groove width of the connection groove of the transition curve is greater than that of the middle spiral groove, the guide rail rods are two, the two guide rail rod intervals are arranged on the rack and are parallel to the two-way screw shaft, the sliding piece is sleeved on the guide rail rod, the sliding piece can slide on the guide rail rod in the front and back, a crescent-shaped lug is arranged on the sliding piece, and is rotatably connected with the sliding piece through a rotating shaft, the lug inlays in the helicla flute of two-way spiral shell axle, the lug and the helicla flute phase-match of two-way spiral shell axle, the connecting rod is two, and two connecting rods couple together slider and piston, the motor sets up in the frame outer end, and the output shaft and the two-way spiral shell of motor are connected in the transmission, the controller sets up in the frame, and the controller is used for controlling the just reversal of motor, and the motor is connected to the controller output, and the controller input is connected the power.

2. The electric air pump as set forth in claim 1, wherein: the pitch of the right spiral groove is twice that of the left spiral groove.

3. The electric air pump as set forth in claim 1, wherein: the piston comprises a piston disc and a piston ring, wherein an annular groove is formed in the periphery of the piston disc, the piston ring is a rubber part, and the piston ring is embedded in the annular groove of the piston disc.

4. The electric air pump as set forth in claim 1, wherein: the bottom end of the pump cylinder and/or the rack is provided with a base, and the upper end of the pump cylinder and/or the rack is provided with a handle.

Technical Field

The invention belongs to the technical field of electric tools, and particularly relates to an electric air pump.

Background

Most of the existing electric air pumps are motors which drive eccentric bodies to rotate, and the eccentric bodies drive pistons to reciprocate. However, since the eccentric body has an asymmetric structure, it generates a large vibration and a large noise during operation, which limits its use in some environments where it is required to be quiet.

It is known that the piston of the electric air pump only works in one stroke and the other stroke is an idle return in one working cycle, and the movement speed of the piston of the existing electric air pump in the two strokes is the same, so that the working efficiency is low.

Disclosure of Invention

In order to solve the defects of the prior art, the invention provides an electric air pump.

The technical scheme adopted by the invention is as follows: an electric air pump comprises a pump barrel, wherein the front end of the pump barrel is provided with an air inlet check valve and an air outlet check valve, a piston is arranged in the pump barrel, the rear end of the pump barrel is provided with a driving assembly for driving the piston to reciprocate, the driving assembly comprises a rack, a bidirectional screw shaft, a guide rail rod, a sliding piece, a connecting rod, a motor and a controller, the rack is fixedly arranged at the rear outer end of the pump barrel, the bidirectional screw shaft is rotatably arranged in the middle of the rack, the bidirectional screw shaft is provided with a left spiral groove and a right spiral groove, the pitch of the right spiral groove is larger than that of the left spiral groove, the left spiral groove and the right spiral groove are connected in a transition curve manner at two ends, the groove width of the transition curve connecting groove is larger than that of the middle spiral groove, the two guide rail rods are arranged on the rack at intervals and are parallel to the bidirectional screw shaft, the sliding piece is sleeved on the guide rail rods, and the sliding piece can slide back and forth on the guide rail rods, be equipped with crescent moon type lug on the slider, the lug rotates with the slider through the pivot to be connected, and the lug inlays in the helicla flute of two-way spiral shaft, lug and the helicla flute phase-match of two-way spiral shaft, the connecting rod is two, and two connecting rods couple together slider and piston, the motor sets up in the frame outer end, and the output shaft and the two-way spiral shaft transmission of motor are connected, the controller sets up in the frame, and the controller is used for controlling the just reversal of motor, and the motor is connected to the controller output, and the power is connected to the controller input.

Further, the pitch of the right helical groove is twice that of the left helical groove.

Further, the piston comprises a piston disc and a piston ring, wherein an annular groove is formed in the periphery of the piston disc, the piston ring is a rubber part, and the piston ring is embedded in the annular groove of the piston disc.

Further, a base is arranged at the bottom end of the pump cylinder and/or the rack, and a handle is arranged at the upper end of the pump cylinder and/or the rack.

When the air inflation is needed, the air outlet one-way valve is communicated with an object to be inflated, the controller controls the motor to rotate in the forward direction, the motor rotates to drive the two-way screw shaft to rotate in the forward direction, the two-way screw shaft is matched with the convex block through the spiral groove of the two-way screw shaft to drive the sliding part to move linearly in a reciprocating mode on the guide rail rod, and the sliding part drives the piston to move linearly in a reciprocating mode through the connecting rod. When the convex block is matched with the left spiral groove, the sliding piece moves leftwards, the sliding piece drives the piston to move leftwards, the piston moves leftwards to compress gas, the power required by the piston to compress the gas is large, and the screw pitch of the left spiral groove is designed to be small, so that the piston can obtain large power when compressing the gas. When the lug is matched with the right spiral groove, the sliding piece moves rightwards, the sliding piece drives the piston to move rightwards, the piston moves rightwards to suck air, the power required by the piston to suck air is small, and the screw pitch of the right spiral groove is designed to be large, so that the piston can reset quickly, and the working efficiency is improved.

When air needs to be pumped, the air inlet one-way valve is communicated with the pumped object, the motor is controlled to rotate reversely through the controller, the motor rotates to drive the two-way screw shaft to rotate reversely, the two-way screw shaft is matched with the lug through the spiral groove of the two-way screw shaft to drive the sliding part, the sliding part reciprocates linearly on the guide rail rod, and the sliding part drives the piston to reciprocate linearly through the connecting rod. When the convex block is matched with the left spiral groove, the sliding piece moves rightwards, the sliding piece drives the piston to move rightwards, the piston moves rightwards to pump air, the power required by the piston to pump air is large, and the screw pitch of the left spiral groove is designed to be small, so that the piston can obtain large power when pumping air. When the lug is matched with the right spiral groove, the sliding piece moves leftwards, the sliding piece drives the piston to move rightwards, the piston moves rightwards to exhaust, the power required by the piston to exhaust is small, and the screw pitch of the right spiral groove is designed to be large, so that the piston can reset quickly, and the working efficiency is improved.

When the lug passes through to right spiral groove or passes through to left spiral groove from right spiral groove from left spiral groove, in order to make the lug can adapt to the change that the helicla flute is to, the scheme is connected for rotating the design of being connected lug and slider, still designs left helicla flute and right helix groove for the transition curve connection at both ends, and the groove width of transition curve spread groove is greater than the groove width of middle helicla flute.

The invention has the beneficial effects that: the bidirectional screw shaft is used for replacing the traditional eccentric body, all parts cannot generate any vibration in the movement process, and the whole device has the advantages of stability and silence in the shape movement process; the invention can be used for inflation and air extraction, because the screw pitches of the left and right spiral grooves on the bidirectional screw shaft are designed to be different in size, and the controller controls the positive and negative rotation of the motor, the piston can be fed at low speed during the piston manufacturing process no matter inflation or air extraction, larger power is generated for the piston, the piston can be retracted quickly when no load exists, and the working efficiency is improved.

Drawings

Fig. 1 is a schematic diagram of the internal structure of the present invention.

Fig. 2 is a schematic view of the structure of the bidirectional screw shaft of the present invention.

Fig. 3 is a schematic view of the sliding member of the present invention.

Fig. 4 is a schematic diagram of the piston structure of the present invention.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

An electric air pump comprises a pump barrel 1, wherein the front end of the pump barrel 1 is provided with an air inlet check valve 2 and an air outlet check valve 3, a piston 4 is arranged in the pump barrel 1, the rear end of the pump barrel 1 is provided with a driving assembly for driving the piston 4 to reciprocate, the driving assembly comprises a rack 5, a two-way screw shaft 6, a guide rail rod 7, a sliding part 8, a connecting rod 9, a motor 10 and a controller 11, the rack 5 is fixedly arranged at the rear outer end of the pump barrel 1, the two-way screw shaft 6 is rotatably arranged in the middle of the rack 5, the two-way screw shaft 6 is provided with a left screw groove 12 and a right screw groove 13, the screw pitch of the right screw groove 13 is larger than that of the left screw groove 12, the left screw groove 12 and the right screw groove 13 are connected in a transition curve manner at two ends, the groove width of the transition curve is larger than that of the middle screw groove, the guide rail rods 7 are arranged on the rack 5 at intervals and are parallel to the two-way screw shaft 6, slider 8 wears to overlap on guide rail pole 7, and slider 8 can slide around on guide rail pole 7, is equipped with crescent lug 14 on slider 8, and lug 14 rotates with slider 8 through pivot 15 to be connected, and lug 14 inlays in the helicla flute of two-way spiral shell axle 6, lug 14 and the helicla flute phase-match of two-way spiral shell axle 6, connecting rod 9 is two, and two connecting rods 9 couple together slider 8 and piston 4, motor 10 sets up in 5 outer ends of frame, and the output shaft and the transmission of two-way spiral shell axle 6 of motor 10 are connected, controller 11 sets up on frame 5, and controller 11 is used for controlling motor 10's just reversal, and motor 10 is connected to 11 outputs of controller, and the power is connected to 11 inputs of controller.

Further, the pitch of the right spiral groove 13 is twice the pitch of the left spiral groove 12.

Further, the piston 4 comprises a piston disc 16 and a piston ring 17, wherein the piston disc 16 is provided with an annular groove 18 at the periphery, the piston ring 17 is a rubber member, and the piston ring 17 is embedded in the annular groove 18 of the piston disc 16.

Further, a base 19 is arranged at the bottom end of the pump barrel 1 and/or the frame 5, and a handle 20 is arranged at the upper end.