CN201934160U

CN201934160U - Novel engine timing chain system

Info

Publication number: CN201934160U
Application number: CN2011200615811U
Authority: CN
Inventors: 徐泽军
Original assignee: Ruizhan Tongling Technologies Co Ltd
Current assignee: Ruizhan Tongling Technologies Co Ltd
Priority date: 2011-03-10
Filing date: 2011-03-10
Publication date: 2011-08-17
Anticipated expiration: 2021-03-10

Abstract

The utility model discloses a novel engine timing chain system comprising a crankshaft timing chain wheel arranged on the crankshaft, a gas inlet camshaft timing chain wheel and a gas outlet camshaft timing chain wheel, a timing chain, a timing chain tensioning mechanism and a chain guide plate, wherein the gas inlet camshaft timing chain wheel and the gas outlet camshaft timing chain wheel are arranged on a camshaft; the timing chain surrounds the three chain wheels; the chain guide plate is arranged at the external side of the timing chain; and the timing chain system also comprises an additional chain guide plate that is arranged between the gas inlet camshaft timing chain wheel and the gas outlet camshaft shaft timing chain wheel. By adopting the technical scheme in which the chain guide plate is additionally arranged, the vibration of the timing chain can be reduced and the service life of the chain can be prolonged; the material of the chain guide plate and the additional chain guide plate adopts a steel-plastic compounded material, therefore, the strength of the parts is increased, the mass of the parts is lightened, the manufacturing cost of the parts is reduced, the whole timing chain system has good smoothness, low vibration, low noise and high reliability.

Description

A kind of new work engine timing chain system

Technical field

The utility model belongs to the technical field of vehicular engine, and specifically, the utility model relates to a kind of timing chain system of new work engine.

Background technique

In the motor car engine working procedure, air inlet, compression, acting, four processes of exhaust constantly take place in cylinder, and all will match with the motion state and the position of piston the opportunity of each step, air inlet and exhaust and piston lifting are coordinated mutually, by the timing transmission system, under the drive of bent axle, give camshaft, make the inlet and outlet door of motor open in due course or close, guarantee that cylinder can normal suction and exhaust strength transmission.

The timing transmission system of motor has the transmission of the band of employing, gear transmission and chaindriven.

Adopt the timing belt transmission, because timing belt belongs to rubber components, along with the increase of engine operating duration, wearing and tearing or aging all can take place as timing belt Idle wheel, timing belt stretcher and water pump etc. in the annex of timing belt and timing belt.General working life is at 40,000-80,000 kilometers.

Adopt the timing gear transmission, problem such as cause the bulky heaviness of engine timing system, noise is big, vibration is big and working life is low has restricted the raising of motor complete machine performance.

Present development along with automotive engineering, engine timing system more and more adopts chain-driven to replace timing belt transmission or gear transmission, timing chain drive system structure compactness, reliability and wear resistance height, and how to improve the performance of timing chain transmission system, reduce noise and become this field urgency technical issues that need to address with vibration.

The model utility content

Technical problem to be solved in the utility model is at the deficiencies in the prior art, provides a kind of and has better smoothness, vibration is low, noise is low and the new work engine timing chain system of light weight,

In order to solve the problems of the technologies described above, the technological scheme that the utility model adopted is: a kind of new work engine timing chain system, comprise the crankshaft timing sprocket that is installed on the bent axle, be installed in admission cam shaft timing sprocket and exhaust cam shaft timing sprocket on the camshaft, timing chain around described three sprocket wheels, the timing chain tensioning mechanism is arranged on the carrier bar of leading in the timing chain outside; This timing chain system also comprises an additional guide carrier bar, between described admission cam shaft timing sprocket and exhaust cam shaft timing sprocket.

The described material of leading carrier bar and additional guide carrier bar adopts steel and plastic composite material.

The described carrier bar of leading is between described admission cam shaft timing sprocket and crankshaft timing sprocket.

Described timing chain tensioning mechanism comprises automatic tensioner and stretcher guide plate; Described stretcher guide plate is oppositely arranged with the described carrier bar of leading between described exhaust cam shaft timing sprocket and crankshaft timing sprocket and in the described timing chain outside; Described stretcher guide plate is fixed by pivot at the one end, and its body is connected with described stretcher.

Describedly lead the side that carrier bar contacts with timing chain and be the larger radius of curvature circular shape.

Advantage of the present utility model is to increase an additional guide carrier bar, can reduce the vibration of timing chain, improves the working life of chain, and to select the material of leading carrier bar and additional guide carrier bar for use be steel and plastic composite material, increased part strength, part quality lightens, and reduces manufacture cost; Whole timing chain system has preferably smoothness, vibration is low, noise is low, reliability is high.

Description of drawings

Fig. 1 is the utility model structural representation;

Mark among the above-mentioned figure is: 1, crankshaft timing sprocket; 2, timing chain; 3, lead carrier bar; 4, admission cam shaft timing sprocket; 5, additional guide carrier bar; 6, exhaust cam shaft timing sprocket; 7, the stretcher guide plate; 8, automatic tensioner.

Embodiment

As shown in Figure 1, a kind of new work engine timing chain system of the utility model, comprise the crankshaft timing sprocket 1 that is installed on the bent axle, be installed in admission cam shaft timing sprocket 4 and exhaust cam shaft timing sprocket 6 on the camshaft, timing chain 2 around described three sprocket wheels, the timing chain tensioning mechanism, what be arranged on timing chain 2 outsides leads carrier bar 3; This timing chain system also comprises an additional guide carrier bar 5, and between described admission cam shaft timing sprocket 4 and exhaust cam shaft timing sprocket 6, this kind structure can reduce the vibration of timing chain 2, improves the working life of chain.

The material of leading carrier bar 3 and additional guide carrier bar 5 adopts steel and plastic composite material, can increase part strength, and part quality is lightened, and has reduced manufacture cost.

Lead carrier bar 3 between admission cam shaft timing sprocket 4 and crankshaft timing sprocket 1, its side that contacts with timing chain 2 is the larger radius of curvature circular shape.

The timing chain tensioning mechanism comprises automatic tensioner 8 and stretcher guide plate 7; Stretcher guide plate 7 and is led carrier bar 3 and is oppositely arranged between exhaust cam shaft timing sprocket 6 and crankshaft timing sprocket 1 and in timing chain 2 outsides; This stretcher guide plate 7 is fixed by pivot at the one end, and its body is connected with described stretcher.Automatic tensioner 8 promotes stretcher guide plate 7, adjusts timing chain 2 elasticities in real time, prevents that timing chain 2 from fluttering.

Adopt technique scheme, make that whole timing chain system has preferably smoothness, vibration is low, noise is low, reliability is high.

In conjunction with the accompanying drawings the utility model has been carried out exemplary description above; obviously the utility model specific implementation is not subjected to the restriction of aforesaid way; as long as adopted the improvement of the various unsubstantialities that method of the present utility model design and technological scheme carry out; or design of the present utility model and technological scheme are directly applied to other occasion without improving, all within protection domain of the present utility model.

Claims

1. new work engine timing chain system, comprise the crankshaft timing sprocket (1) that is installed on the bent axle, be installed in admission cam shaft timing sprocket (4) and exhaust cam shaft timing sprocket (6) on the camshaft, timing chain (2) around described three sprocket wheels, the timing chain tensioning mechanism, what be arranged on timing chain (2) outside leads carrier bar (3); It is characterized in that: this timing chain system also comprises an additional guide carrier bar (5), is positioned between described admission cam shaft timing sprocket (4) and the exhaust cam shaft timing sprocket (6).

2. new work engine timing chain system according to claim 1 is characterized in that: the described material of leading carrier bar (3) and additional guide carrier bar (5) adopts steel and plastic composite material.

3. new work engine timing chain system according to claim 1 and 2 is characterized in that: the described carrier bar (3) of leading is positioned between described admission cam shaft timing sprocket (4) and the crankshaft timing sprocket (1).

4. new work engine timing chain system according to claim 3 is characterized in that: described timing chain tensioning mechanism comprises automatic tensioner (8) and stretcher guide plate (7); Described stretcher guide plate (7) is positioned between described exhaust cam shaft timing sprocket (6) and the crankshaft timing sprocket (1) and in described timing chain (2) outside, is oppositely arranged with the described carrier bar (3) of leading; Described stretcher guide plate (7) is fixed by pivot at the one end, and its body is connected with described stretcher.

5. new work engine timing chain system according to claim 4 is characterized in that: the described carrier bar (3) of leading is the larger radius of curvature circular shape with the side that timing chain (2) contacts.