CN202520935U

CN202520935U - Flexible piston

Info

Publication number: CN202520935U
Application number: CN2012201271168U
Authority: CN
Inventors: 陈伟光
Original assignee: SHAOGUAN WEIGUANG HYDRAULIC CYLINDER CO Ltd
Current assignee: SHAOGUAN WEIGUANG HYDRAULIC CYLINDER CO Ltd
Priority date: 2012-03-30
Filing date: 2012-03-30
Publication date: 2012-11-07
Anticipated expiration: 2022-03-30

Abstract

The utility model relates to a flexible piston, which comprises a piston core and a piston shaft, wherein a piston working surface outside the piston core is provided with a piston ring. The flexible piston is characterized in that: one end of the piston core which is connected with the piston shaft is provided with a blind hole; the piston shaft is positioned in the blind hole of the piston core, and a certain gap is formed between the piston shaft and a piston blind hole; a connecting piece is arranged between the piston shaft and the piston core; and the piston shaft is flexibly connected with the piston core through the connecting piece. The piston core and the piston shaft are not manufactured integrally, so that high manufacturability is achieved; a certain gap is formed between the piston core and the piston shaft, so that the piston shaft is prevented from directly transmitting lateral force to the piston core; and the flexible piston is particularly suitable for driving the piston through a gear rack.

Description

Flexible plunger

Technical field

The utility model relates to piston, especially piston core and the piston shaft piston through flexibly connecting.

Background technique

At present, the piston core of piston and piston shaft or be an integral body, or be linking into an integrated entity through the wrist pin rigidity.For example, piston core, the piston shaft of tooth bar transmission type piston is that tooth bar generally is made in one piece, and the manufacturability of the piston that this mode is made requires many.Also have and adopt other a kind of mode to connect; Piston core and piston shaft are made respectively, piston core axially open a step through-hole, there is tapped hole the end of piston shaft; Piston core is connected with piston shaft through the bolt in the step through-hole, adopts this mode also to require bolt joint and piston seal.Two kinds of piston cores in front and piston shaft all are rigidly connected, if piston has lateral force when work, cause the wearing and tearing between piston and cylinder body to accelerate or seal failure easily.

The model utility content

For overcoming the deficiency of existing technology, the utility model provides a kind of piston core can separate, adopt the piston that flexibly connects with piston shaft, has certain clearance between piston core and piston shaft, and piston shaft can directly not transmit lateral force to piston core.

The technological scheme of the utility model is: a kind of flexible plunger; Comprise piston core and piston shaft, the outside working surface of piston of piston core has piston ring, and the end that piston core links to each other with piston shaft has a blind hole; Piston shaft be arranged in piston core blind hole and and the piston blind hole between certain interval is arranged; Between piston shaft and the piston core link is arranged, flexibly connect through link between piston shaft and the piston core, described link is a thimble.

Be provided with certain interval between piston core and piston shaft.

Described link is a steel ball, and the sidewall of described piston core blind hole is provided with plural hole, is placed with spring and steel ball in this hole, and the inboard of spring contacts with steel ball; Described piston shaft is provided with scrobicular ring or pit near an end of piston core; Steel ball is between the scrobicular ring or pit and spring of piston shaft; A steel ball part is stuck in the scrobicular ring or pit of piston shaft; Another part is stuck in the hole of piston core sidewall, and the spring handle steel ball touch the scrobicular ring or the pit of piston shaft tightly, makes steel ball couple together piston shaft and piston core.

Described link is a thimble, and the plural at least hole of the sidewall setting of described piston core blind hole is placed with spring and thimble in this hole, and the inboard of spring contacts with thimble; Described piston shaft is provided with scrobicular ring or pit near an end of piston core; Thimble is between the scrobicular ring or pit and spring of piston shaft; A thimble part is stuck in the scrobicular ring or pit of piston shaft; Another part is stuck in the hole of piston core sidewall, and the spring handle thimble touch the scrobicular ring or the pit of piston shaft tightly, makes thimble couple together piston shaft and piston core.

Hole on the sidewall of aforementioned piston core blind hole is a blind hole.

Hole on the sidewall of aforementioned piston core blind hole is a through hole, and the spring outside contacts with the spring plug, and the through hole whorl on the sidewall of spring plug and piston core blind hole is connected.Also seal ring can be set between the through hole on spring plug and the sidewall, perhaps the through hole interference fit on spring plug and the sidewall.

Through hole on the sidewall of piston core blind hole is arranged on the inoperative position of piston core.

The outside piston ring of aforementioned piston core is seal ring and supporting ring.

The beneficial effect of the utility model is: because piston core and piston shaft are not whole the manufacturings; Its good manufacturability; Also there is certain interval in dismounting easily between piston core and piston shaft, and piston shaft can directly not transmit lateral force to piston core; Piston core and piston shaft connection part design accuracy require low, and convenient the manufacturing processed.Piston core and piston shaft connection part are not communicated with seal failure in the time of can not causing pistons work with the pistons work position.

Description of drawings

Fig. 1 is the utility model flexible plunger structural representation in one embodiment.

Among the figure: 1-piston core, 2-seal ring, 3-supporting ring, 4-spring plug, 5-spring, 6-steel ball, 7-piston shaft, 8-through hole, 9-scrobicular ring.

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is further specified.

As shown in Figure 1; A kind of flexible plunger comprises piston core 1 and piston shaft 7, and piston core 1 outside working surface of piston has seal ring 2 and supporting ring 3; The end that piston core 1 links to each other with piston shaft 7 has a blind hole; Piston shaft 7 be arranged in piston core 1 blind hole and and the piston blind hole between certain interval is arranged, between piston shaft 7 and the piston core 1 link is arranged, flexibly connect through link between piston shaft 7 and the piston core 1.Described link is a

steel ball

6, and 4 through holes 8 that the sidewall setting of described piston core 1 blind hole is uniformly distributed with, this through hole 8 are arranged on piston core 1 inoperative position, are placed with spring plug 4, spring 5 and steel ball 6 in this through hole 8, and the inboard of spring 5 contacts with steel ball 6.This through hole 8 has a back taper near a side of heart portion; Through hole 8 the diameter dimension at back taper place greater than steel ball 6 diameters 3/4 and less than the diameter of steel ball 6; Like this, steel ball 6 just can not drop in the blind hole, and described piston shaft 7 is provided with a scrobicular ring 9 near an end of piston core 1; Steel ball 6 is between the scrobicular ring 9 and spring 5 of piston shaft 7, and spring 5 outsides contact with spring plug 4, and the through hole 8 on the sidewall of spring plug 4 and piston core 1 blind hole is threaded; There is the countersunk head cross recess in spring plug 4 outsides, and like this, steel ball 6 parts are stuck in the scrobicular ring 9 of piston shaft 7; Another part is stuck in the hole of piston core 1 sidewall, and spring 5 touch the scrobicular ring 9 of piston shaft 7 to steel ball 6 tightly, makes steel ball 6 couple together piston shaft 7 and piston core 1; When piston core 1 needs dismounting with piston shaft 7, need not to pull down spring plug 4, spring 5 and steel ball 6, obeyed the elastic force of spring with certain making every effort to overcome; Just can pull down piston shaft 7, isolation piston axle 7 and piston core 1, also very convenient during installation; As long as just can pack piston shaft 7 into certain power, be connected with piston core 1, and; The piston that this structure connects, piston core and piston shaft can also automatic capturings.

Claims

1. flexible plunger; Comprise piston core and piston shaft; The outside working surface of piston of piston core has piston ring, and it is characterized in that: the end that piston core links to each other with piston shaft has a blind hole, piston shaft be arranged in piston core blind hole and and the piston blind hole between certain interval is arranged; Between piston shaft and the piston core link is arranged, flexibly connect through link between piston shaft and the piston core.

2. flexible plunger as claimed in claim 1 is characterized in that: be provided with certain interval between piston core and piston shaft.

3. flexible plunger as claimed in claim 1 is characterized in that: described link is a steel ball, and the sidewall of described piston core blind hole is provided with plural hole, is placed with spring and steel ball in this hole, and the inboard of spring contacts with steel ball; Described piston shaft is provided with scrobicular ring or pit near an end of piston core; Steel ball is between the scrobicular ring or pit and spring of piston shaft; A steel ball part is stuck in the scrobicular ring or pit of piston shaft; Another part is stuck in the hole of piston core sidewall, and the spring handle steel ball touch the scrobicular ring or the pit of piston shaft tightly, makes steel ball couple together piston shaft and piston core.

4. flexible plunger as claimed in claim 1 is characterized in that: described link is a thimble, and the plural at least hole of the sidewall setting of said piston core blind hole is placed with spring and thimble in this hole, and the inboard of spring contacts with thimble; Described piston shaft is provided with scrobicular ring or pit near an end of piston core; Thimble is between the scrobicular ring or pit and spring of piston shaft; A thimble part is stuck in the scrobicular ring or pit of piston shaft; Another part is stuck in the hole of piston core sidewall, and the spring handle thimble touch the scrobicular ring or the pit of piston shaft tightly, makes thimble couple together piston shaft and piston core.

5. flexible plunger as claimed in claim 4 is characterized in that: the hole on the sidewall of aforementioned piston core blind hole is a blind hole.

6. flexible plunger as claimed in claim 4; It is characterized in that: the hole on the sidewall of aforementioned piston core blind hole is a through hole; The spring outside contacts with the spring plug; Through hole whorl on the sidewall of spring plug and piston core blind hole is connected, and also seal ring can be set between the through hole on spring plug and the sidewall, perhaps the through hole interference fit on spring plug and the sidewall.

7. flexible plunger as claimed in claim 6 is characterized in that: the through hole on the sidewall of piston core blind hole is arranged on the inoperative position of piston core.

8. flexible plunger as claimed in claim 1 is characterized in that: the outside piston ring of aforementioned piston core is seal ring and supporting ring.