CN201026545Y

CN201026545Y - Leadless solder reflow front pressing device

Info

Publication number: CN201026545Y
Application number: CNU2007201205042U
Authority: CN
Inventors: 陈许松
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-05-31
Filing date: 2007-05-31
Publication date: 2008-02-27
Anticipated expiration: 2017-05-31

Abstract

The utility model aims at providing a lead-free reflow soldering positive pressure device which reduces the entering of the external air, assures a comparatively stable environment inside a furnace and reduces the leakage of gas with soldering flux, the utility model is realized in this way that the lead-free reflow soldering positive pressure device comprises a motor which is fixed on the furnace through a motor plate and is in connection with a wind wheel through a motor shaft, the bottom plate of the wind wheel is in communication with the wind inlet channel, the rotary surface of the wind wheel is arranged on the wind outlet channel, the motor plate is provided with a wind fetching tube the wind inlet port of which is arranged on the wind outlet channel, while the wind outlet port of the wind fetching tube is arranged on the axle hole of the motor plate, and the wind inlet port and the wind outlet port are in communication through a hollow channel.

Description

Unleaded Reflow Soldering positive pressure devices

Technical field

The utility model relates to a kind of device with malleation, is meant the positive pressure devices that burner hearth adopts of unleaded Reflow Soldering equipment especially.

Background technology

Between employed motor drive shaft of recyclegas and the motor plate certain clearance is arranged in the existing burner hearth, might cause air to enter in the burner hearth, and promote in the pressure of current lead-free process and manufacturing, under the situation about deepening constantly, because the change of lead-free tin cream composition in the SMT pb-free solder technology, cause the gaseous flux that produces in its welding process more, if constantly there is extraneous air to enter into burner hearth inside, will make the gas leak that contains scaling powder, if reclaim and will not enter the cooling zone entirely, then cause the gas scaling powder to meet the condensation knot, pollute the cooling zone, increase the cleaning difficulty, or drip to the pcb board face, pollute pcb board and cause quality defect; Or the ineffective workshop that enters of exhausting, be unfavorable for that then environment cleaning and the personnel in the workshop are healthy.

Summary of the invention

The purpose of this utility model is to provide unleaded Reflow Soldering positive pressure devices, has reduced entering of extraneous air, guarantees metastable environment in the burner hearth, has reduced the gas leak that contains scaling powder.

The utility model is to realize like this, unleaded Reflow Soldering positive pressure devices, comprise motor, motor is fixed on the burner hearth by the motor plate, and motor connects a wind wheel by motor drive shaft, the base plate of wind wheel communicates with air intake passage, the surface of revolution of wind wheel places on the air-out passage, is fixed with on the motor plate and gets air duct, and the air inlet of getting air duct is located on the air-out passage, get the air outlet of air duct and be located at motor plate axis hole place, air inlet links to each other by hollow pipeline with air outlet.

The above-mentioned air duct of getting is the L type, and the base of L type is fixed on motor plate bottom surface, and the base is provided with air outlet, and air outlet is sheathed on the motor drive shaft; The wind part of getting of L type is located in the air-out passage, is positioned at the wind wheel outside, links to each other with the base and fixes, and air inlet is located to get and is right against wind wheel blade on the wind part; Getting airduct is hollow body, is provided with the hollow pipeline that connects air inlet and air outlet in getting air duct.

Above-mentioned unleaded Reflow Soldering positive pressure devices also comprises the installation screw, and motor is fixed on the motor plate by screw is installed, and is provided with axis hole at motor plate center, and motor drive shaft passes axis hole, and passes friction plate and match with the motor plate.

Above-mentioned motor plate is provided with friction plate, and motor drive shaft passes friction plate, and friction plate and motor drive shaft are in slight Frotteurism.

Like this, the wind that circulates in burner hearth is transported wind to the air-out passage through air intake passage by wind wheel, in stove, return air intake passage after the circulation, owing to be provided with and get air duct, in wind wheel work, the wind that the air intake passage circulation comes is got the air inlet of wind part via the L type, pass through hollow pipeline, be transported to L type hollow pipeline air outlet place, air outlet is located at the motor drive shaft place, and the wind that makes air outlet forms the high pressure with respect to external environment along motor drive shaft direction outside burner hearth, gas is flowed to extraneous by motor plate axis hole place, and add the mica wearing piece at motor plate axis hole place, and this friction plate and motor drive shaft are in slight Frotteurism, and restriction is to extraneous effluent air amount, like this, just can stop the outer air of burner hearth to enter in the burner hearth along the gap of motor drive shaft and motor plate.

Description of drawings

Fig. 1 is the three-dimensional exploded view of the utility model device.

Fig. 2 is the stereogram of the utility model device.

Fig. 3 is the cutaway view of the utility model and burner hearth fit structure.

The figure number explanation:

1, wind wheel; 2, get air duct; 3, motor plate; 4, friction plate; 5, motor is installed screw; 6, motor; 7, motor drive shaft; 8, burner hearth; 9, air intake passage; 10, air-out passage; 11, motor plate axis hole; 21, get the air duct air inlet; 22, get the air duct air outlet; 23, get the air duct air outlet;

The specific embodiment

With reference to Fig. 1, shown in Figure 2, unleaded Reflow Soldering positive pressure devices, motor 6 is fixed on the burner hearth 8 by motor plate 3, and motor 6 connects wind wheel 1 by motor drive shaft 7, and the base plate of wind wheel 1 communicates with air intake passage 9, the surface of revolution of wind wheel 1 places on the air-out path 10, be fixed with on motor plate 3 and get air duct 2, get air duct and be L type ducted body, the air inlet 21 of getting air duct 2 is located in the air-out path 10, get the air outlet 22 of air duct 2 and be located at motor drive shaft 7 places, air inlet 21 and air outlet 22 link to each other by hollow pipeline.

The above-mentioned air duct 2 of getting is the L type, and the base of L type is fixed on motor plate 3 bottom surfaces, and the base is provided with air outlet 22, and air outlet 22 is sheathed on the motor drive shaft 7; The wind part of getting of L type is located in the air-out path 10, links to each other with the base of L type and fixing, and air inlet 21 is located at the L type and is got the side of wind part near wind wheel 1, and is right against wind wheel blade.

The unleaded Reflow Soldering positive pressure devices of the utility model also comprises installs screw 5, and motor is fixed on the motor plate 3 by screw 5 is installed, and is provided with axis hole 11 at motor plate 3 centers, and motor drive shaft 7 passes axis hole 11, and passes friction plate 4.

So when equipment was started working, motor 6 drove wind wheel 1 and rotates, the gas flow in the burner hearth is sent to the air-out path 10 by wind wheel 1 then to air intake passage 9, reclaims air intake passage 9 again after the circulation in the stove, realizes circulation; Simultaneously, owing to be provided with and get airduct 2, in wind wheel 1 work, the wind that air intake passage 9 circulations come is via the air inlet 21 of getting airduct, be transported to air outlet 22 and the air outlet 23 of getting airduct by getting air duct 2, get the air outlet 22 and the air outlet 23 of airduct 2 and be located at motor drive shaft 7 places, make the gas of air outlet 22 form high pressure and mobile along motor drive shaft 7 direction outside motor axis hole 11 place's stoves with respect to the outer gas of stove, and add wearing piece at air outlet and motor plate place and reduce the gap of motor axis hole 11 to reduce the outflow gas flow, like this, just can stop burner hearth 10 air outward along the gap of motor drive shaft 7 with motor plate 3, promptly the axis hole 11 on the motor plate enters in the burner hearth 8.

From the above, it only is preferred embodiment of the present utility model, be not that the utility model technical scope is imposed any restrictions, every foundation technical spirit of the present utility model is to above any trickle modification, equivalent variations and modification that embodiment did, all still belong in the scope of this origination techniques scheme, special and give and indicating.

Claims

1. unleaded Reflow Soldering positive pressure devices, comprise motor, motor is fixed on the burner hearth by the motor plate, motor connects a wind wheel by motor drive shaft, and the base plate of wind wheel communicates with air intake passage, and the surface of revolution of wind wheel places on the air-out passage, it is characterized in that: on the motor plate, be fixed with and get air duct, the air inlet of getting air duct is located on the air-out passage, gets the air outlet of air duct and is located at motor plate axis hole place, and air inlet links to each other by hollow pipeline with air outlet.

2. unleaded Reflow Soldering positive pressure devices as claimed in claim 1 is characterized in that: the above-mentioned air duct of getting is the L type, and the base of L type is fixed on motor plate bottom surface, and the base is provided with air outlet, and air outlet is sheathed on the motor drive shaft; The wind part of getting of L type is located in the air-out passage, is positioned at the wind wheel outside, links to each other with the base and fixes, and air inlet is located to get and is right against wind wheel blade on the wind part; In getting air duct, be provided with the hollow pipeline that connects air inlet and air outlet.

3. unleaded Reflow Soldering positive pressure devices as claimed in claim 1, it is characterized in that: also comprise the installation screw, motor is fixed on the motor plate by screw is installed, and is provided with axis hole at motor plate center, motor drive shaft passes axis hole, and passes friction plate and match with the motor plate.

4. unleaded Reflow Soldering positive pressure devices as claimed in claim 3, it is characterized in that: the motor plate is provided with friction plate, and motor drive shaft passes friction plate, and friction plate and motor drive shaft are in slight Frotteurism.