CN104641102A

CN104641102A - A multifunctional roller clip for a roller tappet assembly

Info

Publication number: CN104641102A
Application number: CN201380040317.1A
Authority: CN
Inventors: V.库梅茨; R.瓦拉塔拉扬
Original assignee: Continental Automotive GmbH
Current assignee: Continental Automotive GmbH
Priority date: 2012-10-11
Filing date: 2013-10-09
Publication date: 2015-05-20
Also published as: WO2014056975A1; KR20150027239A; EP2850310B1; EP2850310A1; KR101656089B1

Abstract

Disclosed is a tappet assembly comprising a piston (2), a spring (3) enclosing the piston, a shoe (4) configured to accommodate a roller (5) and a roller clip (6). The roller clip comprises a piston holding portion, a spring supporting surface, a pair of extended portions of the spring supporting surface. The piston is attached to the piston holding portion (7) of the roller clip. The extended portions (9) of the spring supporting surface (8) are configured to act as a restricting element to prevent movement of the roller. The extended portions of the spring supporting surface comprise a bulged profile at its bottom end and axis of the bulged profile is in line with axis of the roller.

Description

For the multifunctional rolling sub-folder tool of roller tappet assembly

The present invention relates to roller tappet assembly, relate more particularly to the multi-functional clamp for roller tappet assembly.In addition, the present invention relates to the fuel-injection pump, particularly high pressure fuel pump that comprise this roller tappet assembly.

The existing fuel-injection pump comprising tappet assembly has for the roller of tappet and the housing be separated of piston or fixture.One of housing is for keeping plunger in place, and other housing is for keeping roller and seat.

Fig. 1 shows the sectional view of the roller tappet assembly of prior art.The roller fixture of prior art is not multipurpose multifunctional operating system.Tappet assembly comprises additional parts, such as fixture, spring retainer and supporting ring etc.Therefore, the roller that roller fixture does not limit on roller axis moves.Therefore, tappet assembly comprises more parts, and it increases manufacture cost.

The existing mechanism of roller fixture is not multi-functional, and number of components in tappet assembly is more.

Therefore, an object of the present invention is to develop and have multi-functional roller fixture in itself, and have the tappet assembly of less parts, it is economical equally.

The shortcoming of prior art is overcome by the theme of independent technique scheme.Favourable and additional modification provides in subordinate technological scheme, and by providing the assembly required by the disclosure and method to provide.Additional feature and advantage are realized by technology of the present disclosure.Other embodiment of the present disclosure and aspect are described in detail in this article, and are considered as a required disclosed part.

In in a non-restrictive illustrative, provide a kind of tappet assembly, it is used in particular for fuel-injection pump.Bearing and roller fixture that tappet assembly comprises piston, surrounds the spring of piston, is configured to hold roller.Roller fixture comprises a pair extension of piston retaining part, spring bearing surfaces, spring bearing surfaces.Piston is attached to piston retaining part by any mode, and described mode is not limited to such as press fit or snap ring and connects the mode such as (circlipping) or welding.A pair extension of described spring bearing surfaces is configured to be used as limiting element, in order to stop the movement of described roller.The extension of described spring bearing surfaces comprises bulging profile in its bottom end, and the axis of described bulging profile and the axis collinear of described roller.

In one embodiment, described spring is sat and is put on the spring bearing surfaces of described roller fixture.Described tappet assembly comprises roller fixture, and it is assembled into and makes to there is gap between described roller fixture and described bearing.Tappet assembly comprises roller fixture, and it is made into individual unit, and can be made up of metal and nonmetallic material.

In one exemplary embodiment, the disclosure provides the method for assembling tappet assembly, and it comprises following action: be placed into by roller in bearing; By predetermined ways such as such as press fit, snap ring connection and welding, piston is attached to the piston retaining part of roller fixture; Spring is placed on the spring bearing surfaces of described roller fixture; And the roller assembled and bearing are placed in the extension of described spring bearing surfaces.Described piston and described bearing seat contact after assembling.

Aforementioned summary is only exemplary, is not intended to limit by any way.Except above-mentioned exemplary aspect, embodiment and feature, by reference to accompanying drawing and following detailed description, then some aspects, embodiment and feature will become apparent.

Novel feature of the present disclosure and characteristic provide in the dependent claims.But when collaborative accompanying drawing is read, by reference to the following detailed description of exemplary embodiments, the disclosure self and preferred using forestland, again some objects and advantage will get the best understanding.Describe one or more embodiment referring now to accompanying drawing by means of only way of example, reference character similar in accompanying drawing represents similar key element, and in accompanying drawing:

Fig. 1 shows the sectional view of the roller tappet assembly of prior art.

Fig. 2 shows the sectional view of roller tappet assembly of the present disclosure.

Fig. 3 shows the front cross-sectional view of tappet assembly of the present disclosure.

Fig. 4 shows the plan view of tappet assembly of the present disclosure.

Fig. 5 shows the perspective view of tappet assembly of the present disclosure.

Fig. 6 shows the exploded view of tappet assembly of the present disclosure.

Fig. 7 shows the side view of tappet assembly of the present disclosure.

Accompanying drawing is only and illustrates object and embodiment of the present disclosure is shown.Those skilled in the art will recognize like a cork from following description, can adopt the alternate embodiment of structure and the method illustrated herein, and not deviate from principle of the present disclosure described herein.

Foregoing teachings has broadly sketched the contours of characteristic sum technological merit of the present disclosure, can understand detailed description of the present disclosure below better.Supplementary features of the present disclosure and advantage will in following descriptions, and it forms the theme of claims of the present disclosure.It will be understood by those skilled in the art that disclosed design and specific embodiment can by like a cork with making an amendment or being designed for the basis of other structure implementing identical object of the present disclosure.Those skilled in the art are to be further appreciated that these equivalent constructions do not deviate from the scope of the present disclosure as provided in the dependent claims.When considered in conjunction with the accompanying drawings, the novel feature (as about its tissue and operating method) that is considered to characteristic of the present disclosure and some objects and advantage again will be understood better from following description.But should clearly understand, every width accompanying drawing is provided to only for illustrating and describing object, and is not intended to define as to restriction of the present disclosure.

Fig. 2 shows the sectional view of tappet assembly 1 of the present disclosure.Bearing (shoe) 4 and roller fixture 6 that tappet assembly 1 comprises piston 2, surrounds the spring 3 of piston 2, is configured to hold roller 5.Roller fixture 6 comprises a pair extension 9 of piston retaining part 7, spring bearing surfaces 8 and spring bearing surfaces 8.Described a pair extension 9 is configured to be used as limiting element, in order to stop the movement of roller 5.Extension 9 extends downward middle part or the axis (B-B) of roller 5.The extension 9 of spring bearing surfaces 9 comprises bulging profile 10 in its bottom further.Bulging profile 10 is by making from outer surface punching press extension 9.In addition, the axis of bulging profile 10 aligns with the axis (A-A) of roller 5, to have stable maintenance effect, it increases the general stability of tappet assembly 1.Roller 5 rotates to be zero its axis place, moving axially of its restriction bearing 4, and causes roller fixture 6 and bearing 4 to wear and tear less.

Fig. 3 shows the front cross-sectional view of tappet assembly of the present disclosure.Also show roller 5 to be placed in bearing 4 before the roller fixture 6 with tappet assembly 1 is assembled.Piston 2 is attached to the piston retaining part 7 of roller fixture 6.

Fig. 4 shows the plan view of tappet assembly 1 of the present disclosure.Bearing 4 is directed on its inner diameter, and the movement of bearing 4 is restricted.In addition, exhaust passageway is defined around bearing 4, because do not observe the side guidance of bearing 4.

Fig. 5 shows the perspective view of the tappet assembly 1 assembled of the present disclosure.Spring 3 surrounds piston 2, and seat is put on roller fixture 6.When spring 3 shrinks at the duration of work of tappet assembly 1 and expands, spring 3 is kept by roller fixture 6.The piston 2 of tappet assembly 1 is attached to piston retaining part 7 by any mode, is not limited to press fit or snap ring connecting means, and by means of welding.The piston retaining part 7 of roller fixture 6 is made into piston 2 is after assembly is completed contacted with the top surface of the bearing 4 of tappet assembly 1.

Fig. 6 shows the exploded view of tappet assembly of the present disclosure.In another embodiment of the present disclosure, provide the assembling method of tappet assembly 1.The method comprises following action: be placed into by roller 5 in bearing 4; By predetermined way (but be not limited to be selected from comprise press fit, snap ring connects and the mode of group of welding) piston 2 is attached to the piston retaining part 7 of roller fixture 6; Spring 3 is placed on the spring bearing surfaces 8 of roller fixture 6; And the roller 5 assembled and bearing 4 are placed in the extension 9 of spring bearing surfaces 8.The extension 9 of spring bearing surfaces 9 comprises bulging profile 10 in place's bottom end on each extension 9, and aligns with the axis (A-A) of roller 5.Piston 2 contacts with the top surface of bearing 4 after assembling.After assembling roller fixture 6, roller 5 is restricted along the translation or move of its axial direction.Piston 2 move downward period, spring 3 by load applying on spring bearing surfaces 8, then on roller fixture 6, itself so that by active force/dynamic changes process to roller 5.

Fig. 7 shows the side view of tappet assembly 1 of the present disclosure.Roller fixture 6 is assembled into and makes between roller fixture 6 and bearing 4, be provided with gap (B) on all sides.Therefore, after the Long-Time Service of tappet assembly 1, the wearing and tearing between roller fixture 6 and bearing 4 are reduced.Roller fixture 6 is constructed to individual unit, and can be made up of the material being selected from any material such as such as metal and nonmetallic material etc.The order moved upward of active force is as follows.First, the roller 5 contacted with the cam lobe (not shown) of the cam of motor contacts bearing 4.Secondly, from the force transmission of bearing 4 to piston 2, and active force is passed through roller fixture 6 by further, and is finally passed to spring 3 from the active force of roller fixture 6.This can be summarized as follows:

Roller → bearing → piston → fixture → spring

In one embodiment, tappet assembly 1 can be applied to the fuel-injection pump of the explosive motor of the traffic tool.

No matter be to be noted that all parts at this, be independent or in combination in any, is all declared to be one that most important in the present invention, particularly details illustrated in the accompanying drawings, and reference character in accompanying drawing is as follows.

reference character:

Reference character	Describe
		1	Tappet assembly
2	Piston
		3	Spring
4	Bearing
		5	Roller
6	Roller fixture
		7	Piston retaining part
8	Spring bearing surfaces
		9	Extension
10	Bulging profile

advantage

In one embodiment, roller fixture is monomer part, and it has several functions, and therefore roller fixture is multi-functional in itself.Roller fixture coordinates compact, and saves the space at the bottom place of piston.

In one embodiment, the tappet assembly comprising roller fixture is not too heavy, and it has positive effect for moving mass.

In one embodiment, tappet assembly is economical, because eliminate the cost of independent housing, the maintenance fixture of bearing and another fixture of keep-spring.

In one embodiment, the tappet assembly comprising the bearing guided around its external diameter has the exhaust possibility of enhancing.

equivalent

For substantially any plural number used herein and/or singular references, complex conversion can be odd number by those skilled in the art, and/or odd number is converted to plural number, visual field scape and/or application and determine.Various singular/plural displacement may be provided in this article clearly, thinks clear event.

It will be understood by those of skill in the art that, generally speaking, term as used herein, particularly at appended claims (such as, the text of appended claims) in the term that uses, be usually intended to as " open " term that (such as, term " comprises " and should be interpreted as " including but not limited to ", term " has " and should be interpreted as " at least having ", term " comprises " and should be interpreted as " including but not limited to " etc.).What those skilled in the art will be further understood that is, if be intended to provide specific quantity in introduced claim is recorded, then this intention will be recorded in claim clearly, thus when not having this record, just represent there is not this intention.Such as, for the ease of understanding, following appending claims can comprise use introduction phrase " at least one " and " one or more " etc. and introduce claim recitation record.But, the use of this phrase should not be interpreted as implying that any specific rights comprising the record of this introducing claim can require to be restricted to the invention only comprising a this record by the claim record introduced by indefinite article "a" or "an", or even when to comprise introduction phrase and the such as "a" or "an" etc. indefinite article (such as, " one " and/or " one " should be interpreted as meaning " at least one " or " one or more " usually) such as " one or more " or " at least one " in same claim; Definite article is used to introduce when claim is recorded also like this.In addition, even if describe clearly specific quantity introduce claim record, those skilled in the art also will recognize that this record should be interpreted as meaning to be at least described quantity (such as usually, when only recording " two " and there is no other qualifier, usually mean at least two or two or more).In addition, when being similar to " in A, B and C etc. at least one " this idiom when employing, generally speaking, this structure is contemplated that in some sense and one skilled in the art should appreciate that this idiom (system such as, " having the system of at least one in A, B and C " and will include but not limited to have following situation: independent A, independent B, independent C, A and B, A and C, B and C and/or A, B and C three etc.).When being similar to " in A, B or C etc. at least one " this idiom when employing, generally speaking, this structure is contemplated that in some sense and one skilled in the art should appreciate that this idiom (system such as, " having the system of at least one in A, B or C " and will include but not limited to have following situation: independent A, independent B, independent C, A and B, A and C, B and C and/or A, B and C three etc.).Those skilled in the art it is to be further understood that, there is substantially any selectivity word and/or the phrase of two or more options, no matter be in specification, claim or accompanying drawing, be all construed as the possibility of any one or two options expecting comprising in one of these options, these options.Such as, phrase " A or B " is understood to include " A " or " B " or " A and B " these possibilities.

Although disclosed many aspects and embodiment herein, other side and embodiment will be apparent for a person skilled in the art.All aspects of disclosed herein and embodiment are to illustrate, instead of are intended to limit, and its real scope and spirit are shown by appended claim book.

Claims

1. a tappet assembly (1), comprising:

Piston (2),

Surround the spring (3) of described piston (2);

Be configured to the bearing (4) holding roller (5);

It is characterized in that,

Roller fixture (6) comprising:

Piston retaining part (7);

Spring bearing surfaces (8);

A pair extension (9) of described spring bearing surfaces (8), it is configured to be used as limiting element, in order to stop the movement of described roller (5).

2. tappet assembly (1) as claimed in claim 1, wherein, the extension (9) of described spring bearing surfaces (9) comprises bulging profile (10) in its bottom end, the axis of wherein said bulging profile (10) and the axis collinear of described roller (5).

3. tappet assembly (1) as claimed in claim 1, wherein, described piston (2) by from comprising press fit, snap ring connect and welding group any one mode of selecting be attached to described piston retaining part (7).

4. tappet assembly (1) as claimed in claim 1, wherein, described spring (3) is sat and is put on the spring bearing surfaces (8) of described roller fixture (6).

5. tappet assembly (1) as claimed in claim 1, wherein, described roller fixture (6) is assembled into and makes to there is gap (B) between described roller fixture (6) and described bearing (4).

6. assemble a method for tappet assembly (1), described method comprises following action:

Roller (5) is placed in bearing (4);

By predetermined way, piston (2) is attached to the piston retaining part (7) of roller fixture (6);

Spring (3) is placed on the spring bearing surfaces (8) of described roller fixture (6); And

The roller assembled (5) and bearing (4) are placed in the extension (9) of described spring bearing surfaces (8).

7. method as claimed in claim 6, wherein, the extension (9) of described spring bearing surfaces (9) comprises bulging profile (10) in its bottom end, the axis of wherein said bulging profile (10) and the axis collinear of described roller (5).

8. method as claimed in claims 6 or 7, wherein, described roller fixture (6) is assembled into and makes to there is gap (B) between described roller fixture (6) and described bearing (4).

9. the method according to any one of claim 6-8, wherein, described piston (2) and described bearing seat contact after assembling.

10. the method according to any one of claim 6-9, wherein, described piston (2) by from comprising press fit, snap ring connect and welding group any one mode of selecting be attached to described piston retaining part (7).

11. 1 kinds of fuel-injection pumps, it has the tappet assembly (1) according to any one of claim 1-5.