CN2444701Y

CN2444701Y - Tin attrating apparatus

Info

Publication number: CN2444701Y
Application number: CN 00239626
Authority: CN
Inventors: 谭灼坤
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-09-30
Filing date: 2000-09-30
Publication date: 2001-08-29
Anticipated expiration: 2010-09-30

Abstract

The utility model discloses a tin sucking apparatus which comprises a suction nozzle, a cavity, a piston, a seal ring arranged on the piston, a push rod connected with the piston, a button, a spacer pin and a spring, wherein the cavity is split into an upper cavity and a lower cavity by the piston and the seal ring; the upper surface of the ring body of the seal ring has a groove, and an opening of the groove is upward. The structure is helpful for improving the sealing performance and can automatically carry out the abrasion compensation.

Description

A kind of solder sucker

The utility model relates to a kind of solder sucker.

Solder sucker be a kind of when electronic product welds in order to the cleaning tin welding spot instrument.As shown in Figure 1, this solder sucker is in the preparation state.Piston 2 is divided into epicoele 4, cavity of resorption 5 with O V-shaped ring 1 ' with the solder sucker cavity, press button 6 this moment, promote spacer pin 7, push rod 8 is being with piston 3 in spring 9 pullings, retreat rapidly and reset, like this will be in cavity of resorption 5 instantaneous generation negative pressure, the size of negative pressure just depends on the quality of seal ring seal effect.And traditional O V-shaped ring sealability is poor, and can not compensate automatically after the wearing and tearing, makes solder sucker inhale the tin ability, and useful life is short.

The purpose of this utility model is the solder sucker in order to provide a kind of good seal performance and to carry out the seal wears compensation automatically.

Main technical schemes of the present utility model is that this solder sucker comprises suction nozzle, cavity, piston, is contained in the sealing ring on the piston, the push rod that links to each other with piston, button, spacer pin, spring, piston and sealing ring with cavity, be divided into upper and lower chamber, the groove that has opening to make progress along the ring body upper surface of sealing ring

The moment that solder sucker of the present utility model is being started working, the push rod band piston and is retreated rapidly under the spring pulling, produce negative pressure at cavity of resorption, and go up cavity pressure greater than cavity of resorption, the pressure of epicoele forces the lip limit of ring body to be close to cavity inner wall, has strengthened sealability, simultaneously when wear and tear in sealing ring lip limit, within the specific limits, can also make flexible lip limit continue to be close to cavity inner wall, realize the wear automatic-compensation ability of sealing ring by upper cavity pressure.

Fig. 1 is the solder sucker structural representation that has the conventional seals ring;

Fig. 2 is a solder sucker structural representation of the present utility model;

Fig. 3 be the utility model with the structural representation of sealing ring.

As shown in Figure 2, feature of the present utility model is to comprise suction nozzle 10, cavity 11, piston 3, be contained in the sealing ring 1 on the piston, the push rod 8 that links to each other with piston, button 6, spacer pin 7, spring 9, piston 3 and sealing ring 1 with cavity 11, be divided into upper and

lower chamber

4,5, the groove that has opening to make progress along the ring body upper surface of sealing ring.As shown in Figure 3, wherein ring body 1 is square, and it is inverted trapezoidal that the cross section of groove 2 is, and this structure helps utilizing the elasticity of self that lip limit 21 is extended when groove that opening makes progress is subjected to pressure from the top, is close to cavity inner wall.When wear and tear in the lip limit, this extension ability on groove lip limit can also make it keep being close to cavity inner wall.So the existing good sealing of the utility model has the wear compensation ability of carrying out sealing ring automatically again.

Claims

1, a kind of solder sucker, comprise suction nozzle (10), cavity (11), piston (2), be contained in the sealing ring (1) on the piston, the push rod (8) that links to each other with piston, button (6), spacer pin (7), spring (9), piston (3) and sealing ring (1) with cavity (11), be divided into upper and lower chamber (4), (5), it is characterized in that: the groove (2) that has opening to make progress along the ring body upper surface of sealing ring (1).

2, the piston packing ring of a kind of solder sucker according to claim 1 is characterized in that: the ring body of sealing ring (1) is square.

3, the piston packing ring of a kind of solder sucker according to claim 1 is characterized in that: it is trapezoidal that the cross section of groove (2) is inversion.