阅读说明：本技术 一种摇臂轴向限位结构 (A kind of rocker arm axial limit structure ) 是由 李智 徐亚东 于 2019-08-16 设计创作，主要内容包括：一种摇臂轴向限位结构,包括摇臂、摇臂轴、气缸盖,摇臂上开设有摇臂轴安装孔,摇臂通过摇臂轴安装孔套装在摇臂轴上,气缸盖上每缸两侧部位设置有摇臂轴支座,摇臂轴通过摇臂轴支座安装在气缸盖上,摇臂位于气缸盖每缸两侧的摇臂轴支座之间,摇臂轴上位于摇臂与气缸盖每缸两侧的摇臂轴支座之间的部位均设置有限位隔套,限位隔套为圆柱形环状结构,限位隔套上沿其轴向设置有一个贯通整个限位隔套的缺口,缺口的两侧设置有按压平台,限位隔套通过缺口卡接在摇臂轴上,限位隔套的一端与摇臂的侧面相贴合,限位隔套的另一端与气缸盖每缸其中一侧的摇臂轴支座的侧面相贴合。本设计不仅安装与拆卸简便,而且成本低。(A kind of rocker arm axial limit structure, including rocker arm, rocker arm shaft, cylinder head, rocker arm shaft mounting hole is offered on rocker arm, rocker arm is sleeved on rocker arm shaft by rocker arm shaft mounting hole, every cylinder two sides position is provided with rocker arm shaft support in cylinder head, rocker arm shaft is mounted in cylinder head by rocker arm shaft support, rocker arm is located between the rocker arm shaft support of the every cylinder two sides of cylinder head, position on rocker arm shaft between rocker arm and the rocker arm shaft support of the every cylinder two sides of cylinder head is provided with limit spacer, limit spacer is cylindrical annular configuration, the notch of the entire limit spacer of a perforation is provided on limit spacer along its axial direction, the two sides of notch are provided with by flattening bench, limit spacer is connected on rocker arm shaft by notch, the side of one end and rocker arm for limiting spacer fits, limit the other end of spacer and the rocker arm shaft branch of the every cylinder of cylinder head wherein side The side of seat fits.Not only installation and removal are easy but also at low cost by the design.)

1. a kind of rocker arm axial limit structure, including rocker arm (1) and rocker arm shaft (2), rocker arm shaft peace is offered on the rocker arm (1) It fills hole (11), rocker arm (1) is sleeved on rocker arm shaft (2) by rocker arm shaft mounting hole (11), it is characterised in that:

The rocker arm axial limit structure further includes cylinder head (3), and every cylinder two sides position is provided with rocker arm on the cylinder head (3) Shaft stool (4), the rocker arm shaft (2) are mounted on cylinder head (3) by rocker arm shaft support (4), and the rocker arm (1) is located at cylinder It covers between the rocker arm shaft support (4) of (3) every cylinder two sides, rocker arm (1) and cylinder head (3) every cylinder two is located on the rocker arm shaft (2) Position between the rocker arm shaft support (4) of side is provided with limit spacer (5), and the limit spacer (5) is cylindrical annular knot Structure, limits the notch (51) for being provided with entire limit spacer (5) of a perforation on spacer (5) along its axial direction, and limit spacer (5) is led to It crosses notch (51) to be connected on rocker arm shaft (2), the outer peripheral surface for limiting the inner peripheral surface and rocker arm shaft (2) of spacer (5) fits, described The side of one end and rocker arm (1) for limiting spacer (5) fits, and the other end and cylinder head (3) every cylinder for limiting spacer (5) are wherein The side of the rocker arm shaft support (4) of side fits.

2. a kind of rocker arm axial limit structure according to claim 1, it is characterised in that: the two sides of the notch (51) point It is not provided with No.1 by flattening bench (52), No. two by flattening bench (53), the No.1 presses flattening bench by flattening bench (52), No. two (53) one end is connected with the side of notch (51), the other ends of the No.1 by flattening bench (52), No. two by flattening bench (53) to It is outer to be extended.

3. a kind of rocker arm axial limit structure according to claim 2, it is characterised in that: the No.1 presses flattening bench (52) It is right angle with No. two angles by flattening bench (53), and No.1 is pressed by the extended line of plane where flattening bench (52) and No. two and flattened The extended line of plane intersects on the central axes of limit spacer (5) where platform (53).

4. a kind of rocker arm axial limit structure according to claim 2, it is characterised in that: the cross of limit spacer (5) Section is 3/4ths annulus.

5. a kind of rocker arm axial limit structure according to claim 4, it is characterised in that: the limit spacer (5) includes It limits spacer ontology (54), one end of limit spacer ontology (54) is provided with No.1 flange supporting surface (55), No.1 flange Supporting surface (55) and the side of rocker arm (1) fit, and the other end of limit spacer ontology (54) is provided with No. two flange branch The side in support face (56), No. two flange supporting surfaces (56) and cylinder head (3) every cylinder wherein rocker arm shaft support (4) of side is affixed It closes.

6. a kind of rocker arm axial limit structure described in any one of -5 according to claim 1, it is characterised in that: the rocker arm (1) be provided with No.1 supporting surface (12) on positioned at the position of rocker arm shaft mounting hole (11) two sides, the No.1 supporting surface (12) with The end of limit spacer (5) fits.

7. a kind of rocker arm axial limit structure described in any one of -5 according to claim 1, it is characterised in that: the rocker arm The two sides of shaft stool (4) are provided with No. two supporting surfaces, and No. two supporting surfaces and the end of limit spacer (5) fit.

8. a kind of rocker arm axial limit structure described in any one of -5 according to claim 1, it is characterised in that: the limit The manufacture material of spacer (5) is nylon.

Technical field

It is main suitable the present invention relates to engine air distribution system technical field more particularly to a kind of rocker arm axial limit structure For reducing installation and removal difficulty, reduce cost.

Background technique

Engine rocker is mounted in a double-arm lever on cylinder cap, using rocker arm shaft as fulcrum, two-arm Length discrepancy, usually Galianconism end is directly driven by camshaft or is driven indirectly by tappet, push rod, and long arm end is used to push the unlatching of valve.In order to Guarantee that rocker arm accurately opens valve, it usually needs axial limiting is carried out on rocker arm shaft to it, is carried out at present to engine rocker The structure of limit mostly uses elastic cylinder volume pin or circlip for shaft.

Chinese patent, Authorization Notice No. CN204961001U, authorized announcement date are the utility model on January 13rd, 2016 A kind of engine rocker axial direction position limiting structure, including rocker arm, rocker arm shaft are disclosed, rocker arm is equipped with shaft mounting hole, and rocker arm shaft is inserted In shaft mounting hole, annular oil groove is equipped in shaft mounting hole, the periphery of rocker arm shaft is equipped with the limit that length radially extends Position groove, limit groove is corresponding with the position of annular oil groove, installs positioned at the trench bottom of annular oil groove equipped with guide post on rocker arm Hole is equipped with limit guide post in guideing pillar mounting hole, and the front end for limiting guide post is extend into limit groove.

Chinese patent, Authorization Notice No. CN208456686U, the utility model that authorized announcement date is on 2 1st, 2019 A kind of rocker arm axial limit structure, including rocker arm and rocker arm shaft are disclosed, rocker arm shaft mounting hole is offered on rocker arm, rocker arm shaft is inserted In rocker arm shaft mounting hole, the position on rocker arm positioned at rocker arm shaft two sides of mounting hole is provided with supporting surface, is located on rocker arm shaft Position on the outside of supporting surface offers threaded hole, and threaded hole is mutually perpendicular to rocker arm shaft, and screw is equipped in threaded hole, and screw is Interior hexagonal holding screw, screw include sequentially connected cylindrical section, thread segment, frustum, outer peripheral surface and the supporting surface phase of cylindrical section Contact, thread segment are connected with threaded hole, and the diameter of cylindrical section is more than or equal to the Major Diam of thread segment, and the length of thread segment is big In the depth of threaded hole, the bottom of threaded hole is provided with blind hole, and frustum presses closer blind via bottom, the one end of cylindrical section far from thread segment On offer Hexagon hole.

Above two position limiting structure have the shortcomings that one it is common: be exactly when installing or removing position limiting structure, it is more troublesome, Specific purpose tool is needed, and the cooperation on rocker arm shaft is needed to process related installation position, causes overall cost higher.

Summary of the invention

The purpose of the present invention is overcome the problems, such as difficult installation and removal existing in the prior art, defect at high cost and, There is provided that a kind of installation and removal are easy, rocker arm axial limit structure at low cost.

In order to achieve the above object, the technical solution of the invention is as follows: a kind of rocker arm axial limit structure, including rocker arm with Rocker arm shaft offers rocker arm shaft mounting hole on the rocker arm, and rocker arm is sleeved on rocker arm shaft by rocker arm shaft mounting hole；

The rocker arm axial limit structure further includes cylinder head, and every cylinder two sides position is provided with rocker arm shaft branch in the cylinder head Seat, the rocker arm shaft are mounted in cylinder head by rocker arm shaft support, and the rocker arm is located at the rocker arm shaft of the every cylinder two sides of cylinder head Between support, the position on the rocker arm shaft between rocker arm and the rocker arm shaft support of the every cylinder two sides of cylinder head is respectively provided with limited Position spacer, the limit spacer are cylindrical annular configuration, limit and its axial direction is provided with the entire limit of a perforation on spacer The notch of spacer, limit spacer are connected on rocker arm shaft by notch, limit the inner peripheral surface of spacer and the outer peripheral surface phase of rocker arm shaft Fitting, one end and the side of rocker arm of the limit spacer fit, and limit the other end and the every cylinder of cylinder head wherein one of spacer The side of the rocker arm shaft support of side fits.

The two sides of the notch are respectively arranged with No.1 by flattening bench, No. two by flattening bench, and the No.1 presses flattening bench, two Number it is connected by one end of flattening bench with the side of notch, No.1 extends outwardly by flattening bench, No. two by the other end of flattening bench Setting.

The No.1 is right angle by the angle of flattening bench by flattening bench and No. two, and No.1 prolonging by plane where flattening bench Long line and No. two extended lines by plane where flattening bench intersect on the central axes of limit spacer.

The cross section of the limit spacer is 3/4ths annulus.

The limit spacer includes limit spacer ontology, and one end of the limit spacer ontology is provided with the support of No.1 flange The side of face, No.1 flange supporting surface and rocker arm fits, and the other end of the limit spacer ontology is provided with No. two flange branch The side in support face, No. two flange supporting surfaces and the every cylinder of the cylinder head wherein rocker arm shaft support of side fits.

Position on the rocker arm positioned at rocker arm shaft two sides of mounting hole is provided with No.1 supporting surface, the No.1 supporting surface with The end of limit spacer fits.

The two sides of the rocker arm shaft support are provided with No. two supporting surfaces, the end phase of No. two supporting surfaces and limit spacer Fitting.

The manufacture material of the limit spacer is nylon.

Compared with prior art, the invention has the benefit that

1, it is located at the rocker arm shaft branch of rocker arm and the every cylinder two sides of cylinder head in a kind of rocker arm axial limit structure of the present invention on rocker arm shaft Position between seat is provided with limit spacer, and limit spacer is cylindrical annular configuration, limits and is axially arranged on spacer along it There is the notch of the entire limit spacer of a perforation；When installation, the notch for limiting spacer is pressed against rocker arm shaft can make its card Enter rocker arm shaft；When disassembly, the notch for pushing limit spacer can remove limit spacer, and installation and removal are easy, do not need dedicated Tool does not need additional position limiting structure on rocker arm shaft and is coupled position, and overall cost is lower；Limit spacer one end with shake The side of arm fits, and the side for limiting the other end of spacer and the every cylinder of the cylinder head wherein rocker arm shaft support of side fits, Rocker arm is formed and is supported, realizes the axial limiting to rocker arm.Therefore, installation and removal of the present invention are easy, at low cost.

2, in a kind of rocker arm axial limit structure of the present invention two sides of notch be respectively arranged with No.1 by flattening bench, No. two by Flattening bench, so that more convenient when limit disassembling spacer bush；No.1 is right angle by the angle of flattening bench by flattening bench and No. two, and one Number the axis for limiting spacer is intersected at No. two extended lines by plane where flattening bench by the extended line of plane where flattening bench On line, when so that pushing limit spacer, each position uniform force of spacer is limited, improves the service life of limit spacer, and limit Position spacer is easily removed under pushing effect, further reduced disassembly difficulty；The cross section for limiting spacer is 3/4ths Annulus is connected to limit spacer reliably on rocker arm shaft, but also makes installation and removal easy；Limit the system of spacer Producing material material is nylon, reduces installation and removal difficulty, improves the service life of limit spacer.Therefore, the present invention installation with Dismantle simplicity, long service life, high reliablity.

3, limit spacer includes limit spacer ontology in a kind of rocker arm axial limit structure of the present invention, limit spacer ontology One end is provided with No.1 flange supporting surface, and the other end of limit spacer ontology is provided with No. two flange supporting surfaces, is located on rocker arm The position of rocker arm shaft two sides of mounting hole is provided with No.1 supporting surface, and the two sides of rocker arm shaft support are provided with No. two supporting surfaces；It is above-mentioned Each component is fitted using supporting surface in design, not only further improves the installation accuracy of rocker arm, but also improves each component The unfailing performance of work.Therefore, rocker arm installation accuracy height of the present invention, high reliablity.

Detailed description of the invention

Fig. 1 is structural schematic diagram of the invention.

Fig. 2 is the structural schematic diagram that spacer is limited in Fig. 1.

Fig. 3 is the structural schematic diagram of rocker arm in Fig. 1.

In figure: rocker arm 1, rocker arm shaft mounting hole 11, No.1 supporting surface 12, rocker arm shaft 2, cylinder head 3, rocker arm shaft support 4, limit Position spacer 5, notch 51, No.1 press flattening bench 52, two by flattening bench 53, limit spacer ontology 54, No.1 flange supporting surface 55, No. two flange supporting surfaces 56.

Specific embodiment

Below in conjunction with Detailed description of the invention and specific embodiment, the present invention is described in further detail.

Referring to Fig. 1 to Fig. 3, a kind of rocker arm axial limit structure, including rocker arm 1 and rocker arm shaft 2 is opened up on the rocker arm 1 There is rocker arm shaft mounting hole 11, rocker arm 1 is sleeved on rocker arm shaft 2 by rocker arm shaft mounting hole 11；

The rocker arm axial limit structure further includes cylinder head 3, and every cylinder two sides position is provided with rocker arm shaft branch in the cylinder head 3 Seat 4, the rocker arm shaft 2 are installed on the head 3 by rocker arm shaft support 4, and the rocker arm 1 is located at the every cylinder two sides of cylinder head 3 Portion between rocker arm shaft support 4, on the rocker arm shaft 2 between rocker arm 1 and the rocker arm shaft support 4 of the every cylinder two sides of cylinder head 3 Position is provided with limit spacer 5, and the limit spacer 5 is cylindrical annular configuration, limits and its axial direction is provided with one on spacer 5 A notch 51 for penetrating through entire limit spacer 5, limit spacer 5 are connected on rocker arm shaft 2 by notch 51, limit the interior of spacer 5 The outer peripheral surface of circumferential surface and rocker arm shaft 2 fits, and one end of the limit spacer 5 and the side of rocker arm 1 fit, and limits spacer 5 The side of the other end and the every cylinder of the cylinder head 3 wherein rocker arm shaft support 4 of side fit.

The two sides of the notch 51 are respectively arranged with No.1 by flattening bench 52, two by flattening bench 53, the No.1 pressing Platform 52, two are connected by one end of flattening bench 53 with the side of notch 51, and No.1 presses flattening bench 52, two by flattening bench 53 The other end extend outwardly setting.

The No.1 is right angle by flattening bench 52 and No. two angles by flattening bench 53, and No.1 is put down as where flattening bench 52 The extended line in face and No. two extended lines by 53 place plane of flattening bench intersect on the central axes of limit spacer 5.

The cross section of the limit spacer 5 is 3/4ths annulus.

The limit spacer 5 includes limit spacer ontology 54, and one end of the limit spacer ontology 54 is provided with No.1 method Blue supporting surface 55, No.1 flange supporting surface 55 and the side of rocker arm 1 fit, the other end setting of the limit spacer ontology 54 There are No. two flange supporting surfaces 56, the side phase of No. two flange supporting surfaces 56 and the every cylinder of the cylinder head 3 wherein rocker arm shaft support 4 of side Fitting.

Position on the rocker arm 1 positioned at 11 two sides of rocker arm shaft mounting hole is provided with No.1 supporting surface 12, the No.1 branch Support face 12 and the end of limit spacer 5 fit.

The two sides of the rocker arm shaft support 4 are provided with No. two supporting surfaces, the end of No. two supporting surfaces and limit spacer 5 It fits.

The manufacture material of the limit spacer 5 is nylon.

The principle of the present invention is described as follows:

It limits spacer two sides and is equipped with flange supporting surface, limit spacer is nylon material, has certain elasticity, entire to be axially provided with 1/ 4 notches, notch two sides, which are equipped with, presses flattening bench.

Rocker arm is through on rocker arm shaft, and rocker arm two sides respectively have opening limit spacer to be through on rocker arm shaft to be bonded with it, and two It limits rocker arm shaft support side of the spacer respectively with the every cylinder two sides of engine cylinder cap to fit, the axial position tolerance of rocker arm is only It is related to rocker arm shaft support, limit spacer and rocker arm width tolerance, reduce other limit method bring rigid limit positions Fit clearance and more additional cumulative limits such as rocker arm shaft installation accuracy, therefore limit spacer and can more accurately position and shake Axial position of the arm on rocker arm shaft realizes the effect of two sides axial limiting to rocker arm.It is opposite being open when installation limit spacer Rocker arm shaft, which presses, can be caught in rocker arm shaft；When disassembly, limit spacer can be removed by pushing limit spacer by flattening bench, installed and torn open It unloads conveniently, does not need specific purpose tool, additional position limiting structure is not needed on rocker arm shaft and is coupled position, overall cost is lower.

Due to limit spacer use opening mode, can after rocker arm and rocker arm axle assembly are mounted on cylinder head again into Row installation, if limit spacer does not use opening form, it is necessary at first be pre-installed on rocker arm shaft with rocker arm one, then whole assembly In cylinder head, since the limit accuracy of every cylinder is very high, if every cylinder rocker arm and limit spacer can be just stuck in cylinder head, just Need to clamp every cylinder rocker arm and limit spacer while a kind of complexity and can precise positioning install to the tooling of each cylinder Rocker arm and rocker arm axle assembly, therefore on the one hand the design reduces the throwing of special tooling in rocker arm and rocker arm axle assembly installation process Enter and use, reduce installation difficulty, on the other hand limit spacer is particularly convenient during installation or removal, does not need specially With tooling, therefore the installation effectiveness of whole process is substantially increased, reduces production cost, improve productivity effect.