CN208153083U - Guiding mechanism for brake rocker arm of engine spring - Google Patents

Abstract

The utility model discloses a kind of guiding mechanisms for brake rocker arm of engine spring, including the pedestal with accommodating chamber, the accommodating chamber passes through the open end being provided on the pedestal and extraneous perforation, the length direction of the accommodating chamber is consistent with the direction of motion of brake rocker arm of engine spring, and brake rocker arm of engine spring is set in the accommodating chamber.When brake rocker arm of engine work, one end compresses brake rocker arm of engine spring, length direction of the compression direction of brake rocker arm of engine spring along accommodating chamber at this time, the side wall of accommodating chamber forms brake rocker arm of engine spring and limits at this time, brake rocker arm of engine spring is avoided to be bent in compression process, so as to effectively avoid brake rocker arm of engine spring that unbalance loading occurs, guarantee that brake rocker arm of engine and crankshaft keep good contact, and then avoid brake rocker arm of engine spring breakage, engine auxiliary braking is gone on smoothly, traffic safety is guaranteed.

Description

Guiding mechanism for brake rocker arm of engine spring

Technical field

The utility model relates to auto parts machinery manufacture technical fields, more particularly to one kind to be used for brake rocker arm of engine spring Guiding mechanism.

Background technique

With sharply increasing for engine ownership, vehicle safety is increasingly valued by people, more and more Auxiliary braking system is classified as one of the attachment of vehicle indispensability by country.However primary brake system, act on it is auxiliary in transmission system Help braking system exist mostly brake component work long hours be easy overheat, braking efficiency quickly reduces, braking system occupancy vehicle The problems such as space.

To solve the above-mentioned problems, the auxiliary system of vehicle is realized by engine auxiliary braking technology in the prior art It is dynamic, i.e., engine is braked by brake rocker arm of engine, brake rocker arm of engine is generally by rocker arm ontology, brake piston The composition such as control valve, brake rocker arm of engine can realize the oil-filled and draining of brake piston under the cooperation of braking electromagnetic valve, To control braking of the exhaust valve realization to engine.

It keeps well contacting to guarantee to have between brake rocker arm of engine and camshaft, need using engine braking Priming lever spring, brake rocker arm of engine spring one end are resisted against on the shell of engine, and the other end is resisted against engine braking and shakes On arm, but the motion mode of brake rocker arm of engine is to rotate relative to fixed axis, brake rocker arm of engine spring and engine One end of brake rocker arm leans, the fortune of the tache motorice (contact jaw with brake rocker arm of engine spring) of brake rocker arm of engine Dynamic rail mark is arc, and the impulse stroke of brake rocker arm of engine spring is straight line, and brake rocker arm of engine, which works long hours, to be made It occurs bending and deformation at brake rocker arm of engine spring, brake rocker arm of engine can not be effectively ensured and the good of camshaft connects Touching, to influence the effect of auxiliary braking, brake rocker arm of engine spring long-time unbalance loading also easily leads to fracture, causes after fracture The failure of engine auxiliary braking, and then influence the safety of driving.

Utility model content

Purpose of the utility model is to solve at least one above-mentioned problem, which is by following technology What scheme was realized.

The utility model provides a kind of guiding mechanism for brake rocker arm of engine spring, including with accommodating chamber Pedestal, the accommodating chamber by the open end that is provided on the pedestal and it is extraneous penetrate through, the length direction of the accommodating chamber with The direction of motion of brake rocker arm of engine spring is consistent, and brake rocker arm of engine spring is set in the accommodating chamber.

Preferably, mounting hole is offered on the pedestal, fixing bolt passes through the mounting hole and is provided with outside engine Threaded hole on shell is threadedly engaged, so that the pedestal and the engine housing are affixed.

Preferably, the quantity of the mounting hole is multiple, and each mounting hole is arranged around the external circumferential of the pedestal.

It preferably, further include guide post of the middle section with limited block, the diameter of institute's limited block is greater than the straight of the guide post Diameter, the diameter of the limited block are less than the diameter of the accommodating chamber, and the diameter of the limited block is greater than the engine braking and shakes The outer diameter of arm spring, the outer surface of the limited block are resisted against one end of the brake rocker arm of engine spring, the guide post One end be inserted into the brake rocker arm of engine spring, the other end of the guide post is resisted against the convex of brake rocker arm of engine On platform.

Preferably, the limited block and the guide post are coaxially disposed, and the outer diameter of the limited block is greater than the guide post Outer diameter.

It preferably, further include the cover board with via hole, the cover board is fixed in the open end, and the diameter of the via hole is small In the diameter of the limited block, the guide post is resisted against on the boss of the brake rocker arm of engine after passing through the via hole.

Preferably, the via hole and the accommodating chamber are coaxially disposed.

Preferably, the cover board has threaded portion, and the threaded portion is matched with the screw thread being provided on the receiving cavity wall It closes, so that the cover board is fixed with the pedestal.

Preferably, the guide post is integrally formed with the limited block.

Guiding mechanism provided by the utility model, including the pedestal with accommodating chamber, the accommodating chamber is by being provided with Open end and extraneous perforation, the length direction of the accommodating chamber and the movement side of brake rocker arm of engine spring on the pedestal To consistent, brake rocker arm of engine spring is set in the accommodating chamber.

In above structure, brake rocker arm of engine spring is arranged in inside the accommodating chamber of pedestal, the length direction of accommodating chamber It is consistent with the direction of motion of brake rocker arm of engine spring, that is to say, that length of the brake rocker arm of engine spring in accommodating chamber Side moves upwards, and after the installation of brake rocker arm of engine spring, brake rocker arm of engine spring is in confined state, so that starting Machine brake rocker arm keeps good with camshaft and contacts, and when brake rocker arm of engine work, one end makes engine braking Priming lever spring is compressed, at this time length direction of the compression direction of brake rocker arm of engine spring along accommodating chamber, that is to say, that hair Motivation brake rocker arm spring is run along the length direction of accommodating chamber completely, and the side wall of accommodating chamber is to brake rocker arm of engine bullet at this time Spring forms limit, avoids brake rocker arm of engine spring from being bent in compression process, so as to effectively avoid engine Unbalance loading occurs for brake rocker arm spring, guarantees that brake rocker arm of engine and crankshaft keep good contact, and then avoid engine Brake rocker arm spring breakage, engine auxiliary braking are gone on smoothly, and traffic safety is guaranteed.

Detailed description of the invention

By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as practical to this Novel limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings：

Fig. 1 is a kind of structural schematic diagram of specific embodiment of guiding mechanism provided by the utility model；

Fig. 2 is the exploded view of guiding mechanism shown in Fig. 1；

Fig. 3 is the cross-sectional view of guiding mechanism shown in Fig. 1；

Fig. 4 is the structural schematic diagram of pedestal shown in Fig. 2；

Fig. 5 is the structural schematic diagram of guide post shown in Fig. 2；

Fig. 6 is the structural schematic diagram of cover board shown in Fig. 2.

Appended drawing reference

1 is brake rocker arm of engine；

2 be guiding mechanism, and 21 be pedestal, and 211 be accommodating chamber, and 212 be mounting hole, and 22 be brake rocker arm of engine spring, 23 be guide post, and 231 be limited block, and 24 be cover board, and 241 be via hole, and 242 be threaded portion.

Specific embodiment

The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although showing this public affairs in attached drawing The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated here The mode of applying is limited.It is to be able to thoroughly understand the disclosure on the contrary, providing these embodiments, and can be by this public affairs The range opened is fully disclosed to those skilled in the art.

Fig. 1 to Fig. 6 is please referred to, Fig. 1 is a kind of structure of specific embodiment of guiding mechanism provided by the utility model Schematic diagram；Fig. 2 is the exploded view of guiding mechanism shown in Fig. 1；Fig. 3 is the cross-sectional view of guiding mechanism shown in Fig. 1；Fig. 4 is shown in Fig. 2 The structural schematic diagram of pedestal；Fig. 5 is the structural schematic diagram of guide post shown in Fig. 2；Fig. 6 is the structural schematic diagram of cover board shown in Fig. 2.

In a specific embodiment, guiding mechanism 2 provided by the utility model, including with accommodating chamber 211 Pedestal 21, the accommodating chamber 211 are penetrated through by the open end being provided on the pedestal 21 and the external world, the accommodating chamber 211 Length direction is consistent with the direction of motion of brake rocker arm of engine spring 22, and brake rocker arm of engine spring 22 is set to described In accommodating chamber 211.In above structure, brake rocker arm of engine spring 22 is arranged in inside the accommodating chamber 211 of pedestal 21, accommodating chamber 211 length direction is consistent with the direction of motion of brake rocker arm of engine spring 22, that is to say, that brake rocker arm of engine bullet Spring 22 moves on the length direction of accommodating chamber 211, after brake rocker arm of engine spring 22 is installed, brake rocker arm of engine spring 22 are in confined state, contact so that brake rocker arm of engine 1 keeps good with camshaft, when brake rocker arm of engine 1 When work, one end compresses brake rocker arm of engine spring 22, at this time the compression side of brake rocker arm of engine spring 22 To the length direction along accommodating chamber 211, that is to say, that brake rocker arm of engine spring 22 is completely along the length direction of accommodating chamber 211 Operation, the side wall of accommodating chamber 211 forms brake rocker arm of engine spring 22 and limits at this time, avoids brake rocker arm of engine spring 22 are bent in compression process, so as to effectively avoid brake rocker arm of engine spring 22 that unbalance loading occurs, guarantee to start Machine brake rocker arm 1 and crankshaft keep good contact, and then brake rocker arm of engine spring 22 is avoided to be broken, engine auxiliary Braking is gone on smoothly, and traffic safety is guaranteed.

It is to be appreciated that above-mentioned open end is towards brake rocker arm of engine 1, i.e. the length direction direction of accommodating chamber 211, Pedestal 21 is mutually fixed with engine housing, and the outer diameter of brake rocker arm of engine spring 22 is slightly less than the internal diameter of accommodating chamber 211, and two Person's coaxial arrangement, this kind of structure can guarantee that the side wall of accommodating chamber 211 forms good diameter to brake rocker arm of engine spring 22 To limit, it is bent at work to further avoid brake rocker arm of engine spring 22, prevents brake rocker arm of engine Spring 22 occurs there is a situation where unbalance loading is even broken, and the service performance of brake rocker arm of engine spring 22 is improved, to guarantee Engine auxiliary braking effect, and then improve the safety of driving.

It should be pointed out that said base 21 is cylindrical structure, accommodating chamber 211 is provided with one end of pedestal 21, accommodates Chamber 211 is cylinder cavity, and by open end and extraneous perforation, brake rocker arm of engine spring 22 is installed on appearance by open end It receives in chamber 211, the easy making process of this kind of cavity, while the contour structures of brake rocker arm of engine spring 22 can be effectively matched, So as to effectively realize to 22 guiding role of brake rocker arm of engine spring, prevent brake rocker arm of engine spring 22 from occurring partially It carries, guarantees service performance.

It is further understood that, mounting hole 212 is offered on the pedestal 21, and fixing bolt passes through the mounting hole 212 It is threadedly engaged with the threaded hole being provided on engine housing, so that the pedestal 21 and the engine housing are affixed.In base The bottom (far from open end) of seat 21 is provided with mounting plate, and the diameter of mounting plate is greater than the outer diameter of pedestal 21, and mounting hole 212 opens up On a mounting board, the length direction of mounting hole 212 is parallel with the length direction of pedestal 21.When installation, fixing bolt is passed through into peace Dress is threadedly coupled behind hole 212 with the threaded hole on engine housing, this kind of structure dismounting is convenient, while bonding strength is high, The strength and stability of junction can be effectively improved, so that service life is enhanced, so that the cost of maintenance be effectively reduced.

It should be pointed out that above-mentioned mounting hole 212 is unthreaded hole, manufacture is effectively reduced in this kind of structure one side easy making process Cost, be on the other hand easily installed, effectively improve the efficiency of installation.

Further, the quantity of the mounting hole 212 is multiple, and each mounting hole 212 is around the outside of the pedestal 21 Circumferential setting.By the way that multiple mounting holes 212 are arranged, the strength and stability after enabling to pedestal 21 to be mounted can effectively increase By force, stability of the brake rocker arm of engine spring 22 in pedestal 21 when working in reciprocating mode more preferably, effectively avoids engine braking from shaking Arm spring 22 bends, to guarantee the service life of brake rocker arm of engine spring 22, prevents from occurring in the course of work disconnected It splits, engine braking is played one's part to the full, and then guarantee traffic safety.

It should be pointed out that each mounting hole 212 is arranged around the outside spacers of pedestal 21, interval mode is around pedestal 21 The centric angles such as axle center arrangement, improves the intensity of junction, and avoiding the occurrence of stress concentration leads to the reduction of 21 stability of pedestal, avoids The phenomenon that pedestal 21 shakes and falls off, to guarantee the effect used.

It further, further include guide post 23 of the middle section with limited block 231, the diameter of institute's limited block 231 is greater than described The diameter of guide post 23, the diameter of the limited block 231 are less than the diameter of the accommodating chamber 211, the diameter of the limited block 231 Greater than the outer diameter of the brake rocker arm of engine spring 22, the outer surface of the limited block 231 is resisted against the engine braking One end of one end of priming lever spring 22, the guide post 23 is inserted into the brake rocker arm of engine spring 22, the guide post 23 other end is resisted against on the boss of brake rocker arm of engine 1.Brake rocker arm of engine spring 22 is arranged in accommodating chamber 211 Portion, guide post 23 are inserted into brake rocker arm of engine spring 22, and limited block 231 is inserted into brake rocker arm of engine close to guide post 23 The end face of spring 22 is resisted against brake rocker arm of engine spring 22 on the end face of open end, and the diameter of limited block 231 is greater than The outer diameter of brake rocker arm of engine spring 22, guide post 23 protrude from pedestal 21 far from one end of brake rocker arm of engine spring 22 Open end and be resisted against on the boss of engine rocker.When brake rocker arm of engine 1 works, 1 phase of brake rocker arm of engine Own torque is rotated, the boss on brake rocker arm of engine 1 is in contact with guide post 23, and boss and guide post 23 connect at this time Though the motion profile of contravention is camber line, boss relatively rotates with guide post 23, and guide post 23 is done with respect to accommodating chamber 211 Linear motion, the direction of motion of brake rocker arm of engine spring 22 is linear motion at this time, is guaranteeing 1 work of brake rocker arm of engine Brake rocker arm of engine spring 22 can be effectively avoided while making performance, and there is a phenomenon where unbalance loadings and fracture, start to improve The service life of machine tripping spring is effectively ensured the effect of engine auxiliary braking, and then guarantees the safety of driving.

It is to be appreciated that the diameter of above-mentioned limited block 231 is slightly less than the diameter of accommodating chamber 211, with this configuration can Limited block 231 is effectively come into full contact with brake rocker arm of engine spring 22, avoid that clamping stagnation occurs or is fallen off, so that Brake rocker arm of engine spring 22 can sufficiently play a role to brake rocker arm of engine 1 by guide rod, and mechanism is started in guarantee Brake rocker arm of engine spring 22 can be effectively avoided while shaking 1 working performance of arm there is a phenomenon where unbalance loading and is broken, from And the service life of engine braking spring is improved, the effect of engine auxiliary braking is effectively ensured, and then guarantee the peace of driving Entirely.

Further, the limited block 231 is coaxially disposed with the guide post 23, and the outer diameter of the limited block 231 is greater than The outer diameter of the guide post 23.Above structure can guarantee engine braking spring at work, avoid showing for unbalance loading or fracture As occurring, meanwhile, limited block 231 is different with the diameter of both guide posts 23, and guide post 23 can have when meeting using function Effect reduces manufacturing cost, and the quality of guide post 23 reduces, and effectively improves the flexibility of guide post 23, and then guarantee engine braking The service performance of rocker arm 1.

Specifically understand, further include the cover board 24 with via hole 241, the cover board 24 is fixed in the open end, institute The diameter for stating via hole 241 is less than the diameter of the limited block 231, and the guide post 23 is resisted against institute after passing through the via hole 241 On the boss for stating brake rocker arm of engine 1.Open end on pedestal 21 is sealed by above-mentioned cover board 24, and guide post 23 passed through Accommodating chamber 211 is stretched out in hole 241, and the diameter of limited block 231 is greater than the diameter of via hole 241.When installation, first by brake rocker arm of engine Spring 22 is placed into accommodating chamber 211, guide post 23 is inserted into engine braking spring, limited block 231 and engine braking Priming lever spring 22 leans, and guide post 23 passes through the via hole 241 on cover board 24, and cover board 24 is matched with pedestal 21, limited block 231 End face far from brake rocker arm of engine spring 22 leans with cover board 24, and the isolation after installation inside and outside accommodating chamber 211 is effectively kept away Exempt from influence of the external environment to internal part, pedestal 21 and engine housing are affixed, guide post 23 stretch out pedestal 21 part it The boss of free end face and brake rocker arm of engine 1 leans, and brake rocker arm of engine spring 22 is in compressive state at this time.

It enables to the direction of motion of brake rocker arm of engine spring 22 for linear motion based on above structure, is guaranteeing to send out It can effectively avoid brake rocker arm of engine spring 22 that unbalance loading occurs while motivation 1 working performance of brake rocker arm to show with what is be broken As the effect of engine auxiliary braking being effectively ensured, and then guarantee driving to improve the service life of engine braking spring Safety.

Specifically, the via hole 241 is coaxially disposed with the accommodating chamber 211.Above-mentioned via hole 241 and accommodating chamber 211 are coaxial Setting, which can effectively avoid unbalance loading occurs during the work time, there is stress concentration, to improve service life.

Specifically, the cover board 24 has a threaded portion 242, the threaded portion 242 be provided with 211 inner wall of accommodating chamber On be threadedly engaged so that the cover board 24 and the pedestal 21 are fixed.The good stability of above-mentioned connection type can be mentioned effectively The service life of high component, and then reduce the maintenance cost of equipment.

Specifically, the guide post is integrally formed with the limited block.This kind of structure is by being processed and formed at one time, to make It is higher to obtain intensity, and then effectively improves service life and the effect used.

It should be understood that although multiple element, portion can be described using term first, second, third, etc. in the text Part, region, layer and/or section still these component, assembly units, region, layer and/or are limited by these terms than Duan Buying. These terms can only be used to distinguish a component, assembly unit, region, layer or section with another region, layer or section.Unless Context is it is manifestly intended that when otherwise the term and other numerical terms of such as " first ", " second " etc use in the text Sequence or order is not implied that.

The preferable specific embodiment of the above, only the utility model, but the protection scope of the utility model is not It is confined to this, anyone skilled in the art within the technical scope disclosed by the utility model, can readily occur in Change or replacement, should be covered within the scope of the utility model.Therefore, the protection scope of the utility model answers institute It states and is subject to the protection scope in claims.

Claims (9)

1. a kind of guiding mechanism for brake rocker arm of engine spring, which is characterized in that including the pedestal with accommodating chamber, institute State accommodating chamber by the open end that is provided on the pedestal and it is extraneous penetrate through, the length direction of the accommodating chamber and start mechanism The direction of motion of dynamic priming lever spring is consistent, and brake rocker arm of engine spring is set in the accommodating chamber.

2. the guiding mechanism according to claim 1 for brake rocker arm of engine spring, which is characterized in that the pedestal On offer mounting hole, fixing bolt passes through the mounting hole and is threadedly engaged with the threaded hole being provided on engine housing, makes It obtains the pedestal and the engine housing is affixed.

3. the guiding mechanism according to claim 2 for brake rocker arm of engine spring, which is characterized in that the installation The quantity in hole is multiple, external circumferential setting of each mounting hole around the pedestal.

4. the guiding mechanism according to claim 1 for brake rocker arm of engine spring, which is characterized in that in further including Section has the guide post of limited block, and the diameter of institute's limited block is greater than the diameter of the guide post, and the diameter of the limited block is less than The diameter of the accommodating chamber, the diameter of the limited block are greater than the outer diameter of the brake rocker arm of engine spring, the limited block Outer surface be resisted against one end of the brake rocker arm of engine spring, the engine braking is inserted into one end of the guide post In priming lever spring, the other end of the guide post is resisted against on the boss of brake rocker arm of engine.

5. the guiding mechanism according to claim 4 for brake rocker arm of engine spring, which is characterized in that the limit Block and the guide post are coaxially disposed, and the outer diameter of the limited block is greater than the outer diameter of the guide post.

6. the guiding mechanism according to claim 5 for brake rocker arm of engine spring, which is characterized in that further include tool There is the cover board of via hole, the cover board is fixed in the open end, and the diameter of the via hole is less than the diameter of the limited block, described Guide post is resisted against on the boss of the brake rocker arm of engine after passing through the via hole.

7. the guiding mechanism according to claim 6 for brake rocker arm of engine spring, which is characterized in that the via hole It is coaxially disposed with the accommodating chamber.

8. the guiding mechanism according to claim 7 for brake rocker arm of engine spring, which is characterized in that the cover board With threaded portion, the threaded portion be provided with being threadedly engaged on the receiving cavity wall so that the cover board and the base Seat is fixed.

9. the guiding mechanism according to any one of claims 4 to 8 for brake rocker arm of engine spring, feature exist In the guide post is integrally formed with the limited block.