CN2883733Y

CN2883733Y - Combined piston structure of inflator

Info

Publication number: CN2883733Y
Application number: CN 200520037830
Authority: CN
Inventors: 陈启明
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-12-26
Filing date: 2005-12-26
Publication date: 2007-03-28
Anticipated expiration: 2015-12-26

Abstract

The utility model provides a combined type structure of pistons activated, mainly comprising a piston crank, a valve dense gas sheet, a gas ring, an upper piston sheet, a latch fitting, a bearing and a bearing protection cover. The utility model is characterized in that the valve dense gas sheet is arranged on the upper piston sheet; wherein the upper piston sheet is provided with a plurality of exhaust openings, and a bottom piston sheet is connected with the upper part of the piston crank, and forms into an integrated structure; the upper part of the piston crank is provided with bearing holes, and the external diameter of the gas ring is slightly larger than the inner diameter of the cylinder; the upper piston sheet and the lower piston sheet are matched together, with the gas ring locked between the upper piston sheet and the lower piston sheet; the bearing is tightly fit and embedded into the bearing hole of the piston crank; the bearing is locked by the bearing protection cover in the bearing hole. The utility model has the advantages of quick and simple assembly, high stability and repeat replacement reparation; furthermore, the piston operation is smoother during the high-speed work, thus guaranteeing an ideal gas sealing ring of the inflator and a highly stable operation.

Description

Inflator combined live plug structure

Technical field

The utility model relates to a kind of inflator piston, and is particularly a kind of medium and small or with the employed piston structure-improved of car portable type inflator

Background technique

Early stage medium and small or with the employed piston of car portable type inflator all be adopt a kind ofly be similar to that Furtulon (having another name called teflon) etc. is high temperature resistant, anti-abrasive material is as piston gas ring, because the Furtulon material has high plasticity, therefore directly the embedding of prize link spring shape Furtulon is dead or press solidly and die from the piston peripheral surface and then become early stage medium and small or with the unique structure of car portable type piston gas ring that inflator uses.Certainly, there are many shortcomings in this structure, and as the structure stability deficiency, close gas is structure not, so cause that running has some setbacks, gas leakage, air compression is than phenomenons such as deficiencies, in addition, also has problems such as inflationtime long and working life is too short.

Along with technology constantly develops, also has a kind of snare formula compression ring piston structure on the market now, early stage medium and small or to replace with the employed piston structure of car portable type inflator, as shown in Figure 1, this piston structure mainly is to cut in piston A1 outer rim to establish a recessed annular groove A2, and in recessed annular groove A2 a sheathed ring-type compression ring A3, thereby between compression ring and cylinder inner wall, form sealing effect, make piston when the high speed reciprocating operation, reach air compression and the inflation purpose.

But there is following defective equally in this structure:

1. because in this known snare formula compression ring piston structure, compression ring is placed in cover in the piston ring groove, and to hit power quite weak, therefore often takes place that compression ring comes off, off normal and irregular wear situation, thereby do not cause inflator efficient high and shorten working life.

2. this compression ring be sheathed on be fitted in the piston ring groove in the practical operation very high to the quality of fit requirement, this just needs very high empirical value, therefore equipped back size and precision be not excessive be exactly deficiency, if fit dimension and precision are excessive, can cause power motor heavy wear, and compression ring can produce high friction and thermal expansion phenomenon because of running up, thereby makes piston that the clamping stagnation problem take place in cylinder, and then causes the motor scaling loss; If fit dimension and precision deficiency are except compression ring can tightly coming off, also can not cause air compression than not enough and gas leakage because cover hits the location.

At last by shown in Figure 1, the bearing A4 of this structure directly is pressed in the bearing hole A5 with drive fit, in case have individual defective to be exactly that bearing A4 gets loose here or when askew partially, will inevitably cause whole inflator badly damaged, when unlubricated, can be subjected to simultaneously erosions such as dirt bits and aqueous vapor, thereby reduce bearing working life, and then influence inflator utilization efficiency and working life.

Summary of the invention

The purpose of this utility model has been to overcome the shortcoming of prior art, provides a kind of simple in structure, assembles fast and conveniently, has high stability and high-air-tightness, and running is more steady, and charging efficiency is higher, the inflator combined live plug structure that cost is lower.

The concrete technological scheme that the utility model adopts is as follows:

The utility model is mainly by piston rod; the valve airtight plate; compression ring; last slice piston sheet; latch fitting; bearing and bearing protective cover constitute; the valve airtight plate is fitted on the piston sheet; offer exhaust port on last slice piston sheet; piston rod top is connected with down sheet piston sheet and integrative-structure with it; the piston rod bottom offers bearing hole; described compression ring peripheral diameter is a bit larger tham the cylinder inner wall diameter; last slice piston sheet and following sheet piston sheet matched together; compression ring is locked in by latch fitting; between the lower piston sheet; the embedding of described bearing close-fitting is in the piston rod bearing hole, and bearing protective cover locking bearing is in bearing hole

Wherein go up the combination of a piston sheet and valve airtight plate, following sheet piston sheet then hits the set bearing hole in connecting rod bottom with connecting rod and is integrative-structure, compression ring be sandwiched in slice and following sheet piston sheet between, directly firmly be locked in the positioning stud that last slice piston sheet offers by latch fitting, make that compression ring is firmly clamped, thereby form the elastic packing effect with cylinder inner wall.And described sheet piston sheet down offers inlet hole, after being locked in compression ring, because after the upper and lower piston sheet locking combination, inside has kept effective airflow space, therefore can make the valve airtight plate be the densification state during at the past up stroke of quick upper and lower to-and-fro motion when piston, air expels via Piston Compression; And when the down stroke, air has following sheet piston sheet inlet hole to enter, and the airflow space in piston sheet inside forms one pressure, thereby effectively pushes the valve airtight plate open, discharge gas.The upper and lower to-and-fro motion of this high speed has also increased relatively for the importing air mass flow, thereby has significantly improved air mass flow and cylinder compression ratio, and then promoted the inflation performance of inflator except that making that the running of valve airtight plate is more stable.

Compression ring of the present utility model is the hollow bowl structure, make by high temperature resistant and anti-abrasive material, as be similar to Furtulon (teflon) material, the bowl-shape compression ring peripheral diameter of this hollow should be a bit larger tham the cylinder inner wall diameter, and outer rim is the convergence that slopes inwardly slightly, behind corresponding cylinder inner wall, can have the elastic packing state with cylinder inner wall formation, thereby when inflation, reach high leak tightness and high efficiency inflation purpose.

The utility model also is provided with the bearing protective cover, and it is locked in piston rod bearing hole outer rim by latch fitting, and the flange surface of establishing in the bearing protective cover can tightly be oppressed the bearing in the bearing hole, thus effectively avoid bearing because of run up, clamping stagnation and situation such as walk.Formed an effective space between the outer rim of bearing protective cover flange surface and the bearing surface in addition; greasing substance is inserted in addition in its space; just can form the internal sealing type lubrication effect by bearing; effectively improve bearing operation; prevented also simultaneously that the dirt bits from entering in the bearing; thereby bearing is protected, also improved the working life of bearing and whole inflator thus.

Advantage of the present utility model is that its structure is modular, have simple in structure, easy to assembly, can repeat to change and use, reduce user cost and had good gas seal performance, thereby significantly improved charging efficiency, had simultaneously when running up steadily and the advantage of long service life.

Description of drawings

Fig. 1 is the piston sectional structure schematic representation of existing a kind of inflator

Fig. 2 is the utility model form structure schematic representation

Fig. 3 is a STRUCTURE DECOMPOSITION schematic representation of the present utility model

Fig. 4 is the top plan view structural representation of sheet piston sheet under the utility model

Fig. 5 is the utility model last slice piston sheet bottom top plan view structural representation

Fig. 6 is the whole sectional structure schematic representation of the utility model

Embodiment

Below in conjunction with accompanying drawing the utility model is described further:

As Fig. 2, shown in Figure 3, the utility model is mainly formed 7 by valve airtight plate 1, last slice piston sheet 2, compression ring 3, piston rod 4, latch fitting 5, bearing 6 and bearing protective cover and is constituted, wherein valve airtight plate 1 is tenon sheet 11 and the tenon spare 12 that is disposed by a side, valve airtight plate 1 smooth tenon is incumbent on the exhaust port 21 that sheet piston sheet 2 offered surely, piston is when the high speed to-and-fro motion, by the opening and closing action of valve airtight plate 1, can reach the purpose of exhaust and close gas; The piston sheet composite structure that the utility model adopts is last 2, descend 41 two-piece types, wherein go up the equipped as described above one group of valve airtight plate 1 of a piston sheet 2, following sheet piston sheet 41 then is integral mechanism with the set bearing hole 42 in piston rod 4 and bottom, 3 folders of compression ring establish and last slice 2 and following sheet 41 piston sheets between, and pass through lock by the following bottom through-hole 41 of sheet piston sheet 41 by more than one latch fitting 5, can directly be locked in the positioning stud 22 of a piston sheet 2 locks, thereby make compression ring 3 firmly be positioned 2, descend between the sheet piston sheet 41, form the driving fit structure

Described compression ring 3 is tool inner edge formula hollow bowl structure, should make by high temperature resistant and high-abrasive material, as be similar to Furtulon (teflon) material, bowl-shape compression ring 3 peripheral diameters of this hollow should be a bit larger tham the cylinder inner wall diameter, and outer rim is the convergence that slopes inwardly slightly, behind corresponding cylinder inner wall, can have the elastic packing state with cylinder inner wall formation.

The top plan view structural drawing of following piston sheet 41 as shown in Figure 4, following sheet piston sheet inside are provided with depression locating slot 410, and are arranged with through hole 411 at locating slot 410 inner two ends, also are provided with more than one inlet hole 412 in the position of lateral; Last slice piston sheet 2 bottom top plan view structural drawing as shown in Figure 5, its outer rim is provided with a pressure ring flange 23, the bottom is provided with convex type positioning stud 22, depression locating slot 410 with sheet piston sheet 41 under the correspondence closes through hole 411, and after running through by latch fitting 5, the impacting force of auxiliary pressure ring flange 23 just can firmly lock compression ring 3

As shown in Figure 6, above-mentioned last slice piston sheet 2 between last piston sheet 2 and following sheet piston sheet 41, has formed effective airflow space after closing down sheet piston sheet 41 locking compression rings.Therefore, when piston during in the upper and lower to-and-fro motion of high speed, its up stroke can make valve airtight plate 1 be the densification state, thereby air is expelled by Piston Compression, and down stroke can make air by inlet hole 412 importings of sheet piston sheet 41 down, forms one pressure at internal piston airflow space 20, pushes valve airtight plate 1 effectively open, thereby make that the upper and lower to-and-fro motion of piston is steady, significantly promoted air mass flow and cylinder compression ratio.

As shown in Figure 6, the below of piston rod is provided with a bearing hole 42, and bearing 6 is tight with in the bearing hole 42, and bearing hole 42 inboards are provided with a retaining edge 421, is used for keeping off merging and locatees the bearing 6 of being inserted; Be positioned at bearing hole 42 outer rims; with latch fitting that one bearing protective cover 7 is fixing; and see through the flange surface of establishing in the bearing protective cover 7 71 and tightly urge bearing 6 in bearing hole 42; thereby thoroughly get rid of bearing 6 because of run up, clamping stagnation and phenomenon such as walk; simultaneously between 6 on flange surface 71 outer rims of bearing protective cover 7 and bearing in the formed active porosity; after imposing greasing substance 8 and inserting; can form the internal sealing type lubrication effect to bearing 6; thereby effectively improve bearing operation; prevent that dirt bits from entering, prolong bearing and inflator working life.

Though above-mentionedly described the preferred embodiment of considering at present of the present invention; but multiple improvement of having done for those skilled in the art and modification also should be within protection domains of the present utility model, so the utility model should not be limited to the above embodiments.

Claims

1. inflator combined live plug structure; mainly by piston rod; the valve airtight plate; compression ring; last slice piston sheet; latch fitting; bearing and bearing protective cover constitute; it is characterized in that offering exhaust port on the piston sheet; the valve airtight plate is fitted on the exhaust port that the piston sheet is offered; last slice piston sheet bottom surface outer rim is provided with the pressure ring flange; the bottom is provided with positioning stud; described piston rod top is connected with down sheet piston sheet and integrative-structure with it; following sheet piston sheet inside is provided with a depression locating slot; be positioned at the hollow slot outside and also be provided with an above inlet hole; depression locating slot two ends are provided with through hole; corresponding to last slice set double-screw bolt of piston sheet; described last slice piston sheet makes up with corresponding being equipped with of following sheet piston sheet; compression ring is locked between last slice piston sheet and the following sheet piston by latch fitting; described piston rod bottom offers bearing hole, and the embedding of bearing close-fitting is in the piston rod bearing hole, and bearing protective cover locking bearing is in bearing hole.

2. inflator combined live plug structure according to claim 1, it is characterized in that the equipped combination of described upper and lower piston sheet after, it is inner to form effective airflow space.

3. inflator combined live plug structure according to claim 1, it is characterized in that described valve airtight plate be by tenon sheet and the smooth tenon of tenon spare on the exhaust port that last slice piston sheet is offered.

4. inflator combined live plug structure according to claim 1 is characterized in that an above latch fitting up locks compression ring and last slice piston sheet by following sheet piston sheet.

5. inflator combined live plug structure according to claim 1, it is bowl-shape to it is characterized in that described pressure ring is tool inner edge formula hollow, and outer rim is the convergence that slopes inwardly slightly.

6. inflator combined live plug structure according to claim 1 is characterized in that described bearing hole inboard is provided with a retaining edge.

7. inflator combined live plug structure according to claim 1 is characterized in that described bearing protective cover has flange surface, compresses bearing in bearing hole, has formed the useful space between the outer rim of bearing protective cover flange surface and the bearing surface.