CN116122932A

CN116122932A - Timing system

Info

Publication number: CN116122932A
Application number: CN202211171842.4A
Authority: CN
Inventors: 张银华; 张竣; 李晓君; 陈凡; 王松林
Original assignee: Seres Group Co Ltd
Current assignee: Seres Group Co Ltd
Priority date: 2022-09-26
Filing date: 2022-09-26
Publication date: 2023-05-16

Abstract

The invention discloses a timing system, which comprises a chain, a chain wheel, an exhaust phaser and an intake phaser, wherein the chain sequentially surrounds and is meshed with the chain wheel, the exhaust phaser and the intake phaser; a guide rail is arranged on one side of the chain, the guide rail is fixedly connected with a cylinder body of an engine and is provided with a guide groove I for guiding the chain, and a roller I is arranged in the guide groove I and is attached to the outer side surface of the chain; the other side of the chain is provided with a tensioning rail, the tensioning rail is provided with a guide groove II for guiding the chain, and a roller II is arranged in the guide groove II and is attached to the outer side surface of the chain; the roller capable of freely rotating is arranged in the guide groove of the tensioning rail and the guide rail, sliding friction in the existing structure is converted into rolling friction, friction is reduced, power loss is reduced, and oil consumption is further reduced.

Description

Timing system

Technical Field

The invention belongs to the technical field of engines, and particularly relates to a timing system.

Background

In order to cope with the increasing tension of energy problems and the increasing worsening of environmental problems, automobile fuel consumption regulations and exhaust emission regulations are gradually tightened. With the implementation of the third-stage fuel consumption regulation of the country, in order to meet the requirements, the fuel consumption of the engine needs to be reduced, and besides the combustion is optimized, the low-friction part structure is designed.

The timing system is a transmission system which transmits the power of a crankshaft to a cam shaft through a chain when the engine works so as to drive a valve mechanism to open and close on time, so that the engine can continuously work. Timing systems generally include a sprocket, a timing chain, an intake phaser, and an exhaust phaser, wherein the sprocket is coupled to a crankshaft and the sprocket engages the timing chain to drive the timing chain in motion, and the timing chain engages both the intake phaser and the exhaust phaser to rotate. Because the chain system has advantages such as good reliability, maintenance-free, the current engine timing system generally adopts the chain system, in order to guarantee the steady operation of chain, usually can design chain guide rail and tensioning rail to inject the orbit to the chain, avoids appearing jumping situations such as tooth. The tensioning rail and the guide groove of the guide rail in the existing timing system are in direct contact with the chain, sliding friction is generated in the running process of the chain, friction force is large, in addition, in order to lubricate the chain and the chain wheel, an oil duct and a nozzle are required to be added on a cylinder cover of the cylinder body, and complexity and cost of the cylinder cover of the cylinder body are increased. In order to reduce friction in the operation of the timing system and thus reduce fuel consumption, the structure and arrangement of part of components in the existing timing system need to be optimally designed.

Disclosure of Invention

In view of the above, the present invention aims to provide a timing system, which reduces power loss by antifriction design of part of components.

In order to achieve the above purpose, the present invention provides the following technical solutions: a timing system comprising a chain, a sprocket, an exhaust phaser and an intake phaser, the chain encircling and engaging the sprocket, the exhaust phaser and the intake phaser in sequence; a guide rail is arranged on one side of the chain, the guide rail is fixedly connected with a cylinder body of an engine and is provided with a guide groove I for guiding the chain, a roller I is arranged in the guide groove I, and the roller I is attached to the outer side surface of the chain; the other side of the chain is provided with a tensioning rail, the tensioning rail is provided with a guide groove II for guiding the chain, a roller II is arranged in the guide groove II, and the roller II is attached to the outer side face of the chain;

the roller capable of freely rotating is arranged in the guide groove of the tensioning rail and the guide rail, sliding friction in the existing structure is converted into rolling friction, friction is reduced, power loss is reduced, and oil consumption is further reduced.

Further, one end of the tensioning rail is rotationally connected with a cylinder body of the engine, the other end of the tensioning rail is propped against the cylinder body of the engine through a hydraulic tensioner, and the hydraulic tensioner can control the tensioning rail to rotate freely; the hydraulic tensioner can provide effective tensioning force for the tensioning rail, and proper tensioning force for the running of the chain is ensured, so that the chain can run stably.

Further, the hydraulic tensioner is communicated with a lubricating oil duct of the engine, an oil groove is formed in the tensioning rail, the inlet end of the oil groove is communicated with the oil outlet of the hydraulic tensioner, the outlet end of the oil groove is connected with the chain, lubrication can be effectively provided for the chain through the structure, and meanwhile, an oil nozzle is not required to be independently arranged on the cylinder body or the cylinder cover, so that the structure of the cylinder body and the cylinder cover is simplified.

Further, the tensioning rail comprises an arc-shaped bracket and a chain guide plate in conformal fit with the arc-shaped bracket, one end of the chain guide plate is fixedly provided with a fixing hook for externally buckling and fixing the end part of the arc-shaped bracket, the other end of the chain guide plate is provided with an end clamping tongue, and the end part of the arc-shaped bracket is provided with an end clamping groove corresponding to the end clamping tongue; the structure is convenient for stably installing the chain guide plate on the arc-shaped bracket, has simple structure and is convenient to manufacture, assemble, disassemble and replace.

Further, the middle of the chain guide plate is also provided with a middle clamping tongue, and the middle of the arc-shaped support is provided with a middle clamping groove corresponding to the middle clamping tongue, so that the stability of the installation of the chain guide plate is further enhanced.

Further, the guide grooves I are arranged on the chain guide plate, and the rollers I are rotationally arranged in the guide grooves I and uniformly and tightly arranged into a plurality of groups along the slotting direction; the structure is convenient for fully contact with the chain, ensures the stable operation of the chain, and simultaneously has rolling friction between the roller and the chain, small friction force and small power loss.

Further, the guide rail comprises an arc-shaped mounting frame and an arc-shaped guide plate in conformal fit with the arc-shaped mounting frame, the guide groove II is arranged on the arc-shaped guide plate, and the rollers II are rotationally arranged in the guide groove II and uniformly and tightly arranged in a plurality of groups along the slotting direction of the rollers II; the structure is convenient for fully contact with the chain, ensures the stable operation of the chain, and simultaneously has rolling friction between the roller and the chain, small friction force and small power loss.

Further, the upper end of the arc-shaped guide plate is fixedly provided with a clamping hook for being externally buckled and fixed at the end part of the arc-shaped mounting frame, the lower part of the arc-shaped guide plate close to the lower part is provided with a lower clamping tongue, and the lower part of the arc-shaped mounting frame is provided with a lower clamping groove corresponding to the lower clamping tongue; such structure is convenient for stably install arc baffle on the arc mounting bracket, simple structure, the preparation of being convenient for are convenient for simultaneously dismouting change.

Further, a middle clamping tongue is further arranged in the middle of the arc-shaped guide plate, and a middle clamping groove is formed in the middle of the arc-shaped mounting frame corresponding to the middle clamping tongue; further enhancing the stability of the installation of the arc-shaped guide plate.

Further, a chain upper guide rail is arranged on the upper side of the chain, the chain upper guide rail comprises an upper guide plate and an upper guide plate mounting plate, a connecting hook for being externally buckled on the right end part of the upper guide plate mounting plate is arranged at the right end of the upper guide plate mounting plate, a right hook groove is formed in the position, close to the right end, of the upper guide plate, corresponding to the connecting hook, a left clamping tongue is arranged in the position, close to the left end, of the upper guide plate mounting plate, a left clamping groove is formed in the position, close to the left end, corresponding to the left clamping tongue, of the upper guide plate, and the upper guide plate is made of wear-resistant materials; the stability of the upper operation of the chain is guaranteed by arranging the upper guide rail of the chain, the structure of the upper guide rail of the chain is simple, the upper guide rail is convenient to detach and replace, and meanwhile, the upper guide plate is made of wear-resistant materials and has good durability.

In summary, the present invention at least comprises the following advantages:

1. according to the invention, the freely rotatable rollers are arranged in the guide grooves of the tensioning rail and the guide rail, so that sliding friction in the existing structure is converted into rolling friction, and friction is reduced, thereby reducing power loss and further reducing oil consumption.

2. Tension can be effectively provided through the use of the hydraulic tensioner, lubrication can be effectively provided for the chain through arranging an oil groove on the tensioning rail and communicating with an oil outlet of the hydraulic tensioner, and meanwhile, an oil nozzle is not required to be independently arranged on the cylinder body or the cylinder cover, so that the structures of the cylinder body and the cylinder cover are simplified.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objects and other advantages of the invention may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.

Drawings

FIG. 1 is a front view of the present invention

Fig. 2 is an isometric view of a guide rail

FIG. 3 is a partial cross-sectional view of a guide rail

Fig. 4 is an isometric view of a tension rail

FIG. 5 is a partial cross-sectional view of a tension rail

Fig. 6 is an isometric view of a guide rail on a chain

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.

Referring to fig. 1-6, a timing system includes a chain 1, a sprocket 2, an exhaust phaser 4, and an intake phaser 3, wherein the chain 1 is looped around and engaged with the sprocket 2, the exhaust phaser 4, and the intake phaser 3 in sequence; a guide rail 5 is arranged on one side of the chain 1, the guide rail 5 is fixedly connected with a cylinder body of an engine and is provided with a guide groove I502 d for guiding the chain 1, a roller I503 is arranged in the guide groove I502 d, and the roller I503 is attached to the outer side surface of the chain 1; a tensioning rail 6 is arranged on the other side of the chain 1, a guide groove II 602e for guiding the chain 1 is arranged on the tensioning rail 6, a roller II 603 is arranged in the guide groove II 602e, and the roller II 603 is attached to the outer side surface of the chain 1;

by arranging the rollers capable of freely rotating in the guide grooves of the tensioning rail 6 and the guide rail 5, sliding friction in the existing structure is converted into rolling friction, friction is reduced, power loss is reduced, and oil consumption is further reduced.

In this embodiment, the one end of tensioning rail 6 rotates with the cylinder body of engine to be connected, and the other end withstands through hydraulic pressure tensioning ware 7, hydraulic pressure tensioning ware 7 steerable tensioning rail 6 carries out free rotation, and here hydraulic pressure tensioning ware 7 sets up in the position of leaning on the upper end, and the lower extreme of tensioning rail 6 rotates with the cylinder body through the mounting hole to be connected, and hydraulic pressure tensioning ware 7 is current structure, and here no longer expansion is described, can provide effectual tensioning force for tensioning rail 6 through setting up hydraulic pressure tensioning ware 7, guarantees that chain 1 operates has appropriate tensioning force to can steady operation.

In this embodiment, the hydraulic tensioner 7 is communicated with a lubricating oil duct of the engine, the tensioning rail 6 is provided with an oil groove, an inlet end of the oil groove is communicated with an oil outlet 701 of the hydraulic tensioner, and an outlet end of the oil groove is connected with the chain 1; here, the oil groove is the oil groove mouth 601a that sets up on arc support 601 and the oil port 602d that leads to that corresponds on the chain baffle 602, and the lubricating oil that goes out to hydraulic tensioner oil-out 701 can carry out effective lubrication to the chain through oil groove mouth 601a and oil port 602d to reduce friction loss, need not design the fuel sprayer on cylinder body or cylinder cap alone simultaneously, thereby simplify the structure of cylinder body and cylinder cap.

In this embodiment, the tensioning rail 6 includes an arc-shaped bracket 601 and a chain guide 602 that is in conformal fit with the arc-shaped bracket, one end of the chain guide 602 is fixedly provided with a fixing hook 602b for being fastened to the end of the arc-shaped bracket 601, the other end of the chain guide 602 is provided with an end clamping tongue 602a, and the end of the arc-shaped bracket 601 is provided with an end clamping groove corresponding to the end clamping tongue 602 a; such structure is convenient for install chain baffle 602 on arc support 601 steadily, simple structure, be convenient for the preparation, and the dismouting of being convenient for is changed simultaneously, and arc structure is favorable to the steady transmission of chain.

In this embodiment, an intermediate clip tongue 602c is further disposed in the middle of the chain guide 602, and an intermediate clip groove 601b is disposed in the middle of the arc-shaped bracket 601 corresponding to the intermediate clip tongue 602c, so as to further enhance the stability of installation of the chain guide 602.

In this embodiment, guide slot I602 e set up in on the chain baffle 602, roller I603 pivoted set up in guide slot I602 e and along its fluting direction even and inseparable setting be the multiunit, here the both ends of roller I603 pivoted respectively set up on the both sides of guide slot I602 e inner wall, for the durability of use, can set up the roller at the both ends of roller, such structure be convenient for with the full contact of chain, guarantee the steady operation of chain 1, be rolling friction between roller and the chain simultaneously, frictional force is little, power loss is little.

In this embodiment, the guide rail 5 includes an arc-shaped mounting frame 501 and an arc-shaped guide plate 502 that is in conformal fit with the arc-shaped mounting frame, the guide groove ii 502d is disposed on the arc-shaped guide plate 502, and the rollers ii are rotatably disposed in the guide groove ii and uniformly and tightly disposed in multiple groups along the slotting direction thereof; the structure is convenient for fully contact with the chain, ensures the stable operation of the chain, and simultaneously has rolling friction between the roller and the chain, small friction force and small power loss.

In this embodiment, the guide rail 5 includes an arc-shaped mounting frame 501 and an arc-shaped guide plate 502 that is in conformal fit with the arc-shaped mounting frame 501, the guide groove ii 502d is disposed on the arc-shaped guide plate 502, and the rollers ii 503 are rotatably disposed in the guide groove ii 502d and uniformly and tightly disposed in multiple groups along the slotting direction thereof; the structure is convenient for fully contact with the chain, ensures the stable operation of the chain, and simultaneously has rolling friction between the roller and the chain, small friction force and small power loss.

In this embodiment, a clamping hook 502a for fastening the end of the arc-shaped mounting frame 501 is fixedly disposed at the upper end of the arc-shaped guide plate 502, a lower clamping tongue 502c is disposed at the lower portion of the arc-shaped guide plate 502, and a lower clamping groove 501b is disposed at the lower portion of the arc-shaped mounting frame 501 corresponding to the lower clamping tongue 502 c; such structure is convenient for stably install arc baffle 502 on arc mounting bracket 501, simple structure, the preparation of being convenient for are convenient for simultaneously dismouting change.

In this embodiment, a middle clamping tongue 502b is further disposed in the middle of the arc-shaped guide plate 502, and a middle clamping groove 501a is disposed in the middle of the arc-shaped mounting frame 501 corresponding to the middle clamping tongue 502 b; further enhancing the stability of the installation of the arcuate guide plate 502.

In this embodiment, a chain upper guide 8 is disposed on the upper side of the chain 1, the chain upper guide includes an upper guide plate 802 and an upper guide plate mounting plate 801, a connecting hook 802a for being fastened to the right end of the upper guide plate mounting plate 801 is disposed at the right end of the upper guide plate 802, a right hook groove 801a is disposed at a position of the upper guide plate mounting plate 801 near the right end corresponding to the connecting hook 802a, the right hook groove 801a is used for clamping the connecting hook 802a, a left clamping tongue 802b is disposed at a position of the upper guide plate 802 near the left end, a left clamping groove 801b is disposed at a position of the upper guide plate mounting plate 801 near the left end corresponding to the left clamping tongue 802b, and the upper guide plate 801 is made of a wear-resistant material; the stability of the upper operation of the chain 1 is guaranteed through the arrangement of the upper chain guide rail 8, the upper chain guide rail 8 is simple in structure and convenient to detach and replace, and meanwhile, the upper guide plate is made of wear-resistant materials and is good in durability.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered by the scope of the claims of the present invention.

Claims

1. A timing system, characterized by: the device comprises a chain, a chain wheel, an exhaust phaser and an intake phaser, wherein the chain is sequentially encircling and meshed with the chain wheel, the exhaust phaser and the intake phaser;

a guide rail is arranged on one side of the chain, the guide rail is fixedly connected with a cylinder body of an engine and is provided with a guide groove I for guiding the chain, a roller I is arranged in the guide groove I, and the roller I is attached to the outer side surface of the chain;

the tensioning rail is installed to the opposite side of chain, be provided with on the tensioning rail and be used for right the guide way II that the chain led, install roller II in the guide way II, roller II laminating in the lateral surface of chain.

2. The timing system of claim 1, wherein: one end of the tensioning rail is rotationally connected with a cylinder body of the engine, the other end of the tensioning rail is propped against the cylinder body of the engine through a hydraulic tensioner, and the hydraulic tensioner can control the tensioning rail to rotate freely.

3. The timing system of claim 2, wherein: the hydraulic tensioner is communicated with a lubricating oil duct of the engine, an oil groove is formed in the tensioning rail, the inlet end of the oil groove is communicated with the oil outlet of the hydraulic tensioner, and the outlet end of the oil groove is connected with the chain.

4. The timing system of claim 2, wherein: the tensioning rail comprises an arc-shaped support and a chain guide plate matched with the arc-shaped support in a conformal mode, a fixing hook used for being fixed at the end of the arc-shaped support through an outer buckle is fixedly arranged at one end of the chain guide plate, an end clamping tongue is arranged at the other end of the chain guide plate, and an end clamping groove is formed in the end of the arc-shaped support corresponding to the end clamping tongue.

5. The timing system of claim 4, wherein: the middle of the chain guide plate is also provided with a middle clamping tongue, and the middle of the arc-shaped bracket is provided with a middle clamping groove corresponding to the middle clamping tongue.

6. The timing system of claim 5, wherein: the guide groove I is arranged on the chain guide plate, and the rollers I are arranged in the guide groove I in a rotating mode and uniformly and tightly arranged into a plurality of groups along the grooving direction of the rollers I.

7. The timing system of claim 1, wherein: the guide rail comprises an arc-shaped mounting frame and an arc-shaped guide plate matched with the arc-shaped mounting frame in a conformal mode, the guide groove II is formed in the arc-shaped guide plate, and the rollers II are arranged in the guide groove II in a rotating mode and are uniformly and tightly arranged into a plurality of groups along the grooving direction of the rollers II.

8. The timing system of claim 7, wherein: the upper end of the arc-shaped guide plate is fixedly provided with a clamping hook for being fixed at the end part of the arc-shaped mounting frame through an outer buckle, a lower clamping tongue is arranged at the position, close to the lower part, of the arc-shaped guide plate, and a lower clamping groove is formed in the lower part of the arc-shaped mounting frame corresponding to the lower clamping tongue.

9. The timing system of claim 8, wherein: the middle of the arc-shaped guide plate is also provided with a middle clamping tongue, and the middle of the arc-shaped mounting frame is provided with a middle clamping groove corresponding to the middle clamping tongue.

10. The timing system of claim 1, wherein: the upper side of chain is provided with the chain upper guide rail, the chain upper guide rail includes baffle and last baffle mounting panel, go up the right-hand member of baffle be equipped with be used for outer detain in go up the connecting hook of baffle mounting panel right-hand member portion, go up the baffle and be provided with left portion block tongue near the position of left end, it is provided with left portion draw-in groove to go up the baffle mounting panel near the left end and correspond left portion block tongue, go up the baffle and be prepared by wear-resisting material.