CN102116214A

CN102116214A - Timing housing mounting structure of engine

Info

Publication number: CN102116214A
Application number: CN 201110075496
Authority: CN
Inventors: 刘彦华; 彭红; 熊竹林; 梁文锋; 胡春林
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2011-03-28
Filing date: 2011-03-28
Publication date: 2011-07-06

Abstract

The invention discloses a timing housing mounting structure of an engine. The timing housing is covered outside a timing system of the engine, and is connected and fixed with a cylinder through a bolt; under the timing housing, a spare part of the timing system of the engine is fixed on the cylinder through a fastening bolt. The structure is improved as follows: a fastening bolt of a tension pulley is designed into a bolt with a special structure; the upper end and the lower end of the fastening bolt respectively have a thread structure; and the middle of the fastening bolt has a column structure, the diameter of which is more than the two ends; a pressing gasket is arranged between the column structure and a lower thread end; the lower thread end penetrates the tension pulley and is screwed into the cylinder; the pressing gasket is pressed on the spare part; the upper end of the column structure is supported on the inner roof of the timing housing; and an upper thread end penetrates out of the timing housing, and is fixed by a nut. The timing housing mounting structure of the engine has the advantages of simple and practical structure, convenience for installation, low cost, and reliable result.

Description

A kind of timing shell mounting structure of motor

Technical field

The present invention relates to the timing shell mounting structure of motor.

Background technique

Along with the speed of automobile develops to the lightweight direction to the weight of speed up, vehicle body, the vibration noise problem becomes increasingly conspicuous, and people are to the also more and more strictness of requirement of vibration and noise.The smoothness of automobile running, riding comfort more and more are subjected to people's attention.

As shown in Figure 1, existing engine timing system part-structure comprises cylinder body 1 and is fixed in the timing shell that plays the dust sealing effect 4 on this cylinder body 1, the Idle wheel 3 of engine timing system is fixed on the cylinder body 1 by clamping bolt 2, the threaded end of this clamping bolt 2 passes Idle wheel 3 and is connected with cylinder body 1, the nut end is pressed on the surface of Idle wheel 3, and Idle wheel 3 is fixed on the cylinder body 1 tightly.Because timing shell 4 is generally thin walled structures, its radiated noise is the significant contribution source of complete machine (car) noise often, is the emphasis of NVH control.And the timing shell installation form of existing structure only has bolt at the case periphery, and the neutral position becomes the sensitive spot of radiated noise without any fixing and support, makes noise be difficult to control.

Summary of the invention

The technical problem to be solved in the present invention provides a kind of simple in structure, timing shell mounting structure that can effectively reduce the motor of timing shell radiated noise, and between control case and the part 3 distance fastening, be connected, the stay bolt structure.

For solving the problems of the technologies described above, the present invention takes following technological scheme:

A kind of timing shell mounting structure of motor, described timing shell covers on outside the engine timing system, be connected and fixed by bolt and cylinder body, under timing shell, the part of engine timing system by clamping bolt fixing with cylinder body on.The improvement of this structure is that the clamping bolt with Idle wheel is designed to a kind of bolt of special construction, it is respectively worm structure in two ends up and down, the centre is the column structure of diameter greater than two ends, be provided with compress gasket between described column structure and the following threaded end, following threaded end passes Idle wheel and precession cylinder body, and compress gasket is pressed on the part; The upper end of described column structure is supported on the inner top surface of timing shell, and last threaded end passes timing shell, is fixed by nut.

Compared with prior art, the present invention has following advantage:

1, the sensitive spot at timing shell increases constraint, effectively reduces radiated noise;

2, adopt the mode that prolongs the Idle wheel clamping bolt, additionally do not increase bolt and cylinder body mounting hole, save the space, change little;

3, the column structure that adopts in the middle of this clamping bolt has effectively guaranteed the relative distance between timing shell and the Idle wheel, even still can guarantee the relative distance of timing shell and Idle wheel after the timing shell distortion;

4, clamping bolt does not influence the state of timing system by the fixing timing shell of last threaded end and nut when dismantling case, and is easy to maintenance, with low cost, is connected firmly.

As seen, the present invention is by adopting a kind of special clamping bolt form, have effect fastening, that connect and support case simultaneously concurrently, increase constraint at timing shell dynamic characteristic sensitive spot, thereby effectively control the timing shell radiated noise, this is simple and practical, easy for installation, with low cost, reliable for effect.

Description of drawings

Fig. 1 is the schematic representation of former engine timing system part

Fig. 2 is the timing system part schematic representation that adopts structure of the present invention

Fig. 3 is the structural representation of clamping bolt of the present invention

Among the figure, cylinder body 1, clamping bolt 2, last threaded end 21, column structure 22, following threaded end 23, Idle wheel 3, timing shell 4, nut 5, compress gasket 6.

Embodiment

The invention will be further described below in conjunction with accompanying drawing and by specific embodiment.

Referring to Fig. 2, this structure comprises cylinder body 1 and is fixed in the timing shell that plays the dust sealing effect 4 on this cylinder body 1, also has Idle wheel 3 is fixed in clamping bolt 2 on the cylinder body 1.

This clamping bolt 2 is bolts of a kind of special construction, referring to Fig. 3, this clamping bolt about in the of 2 two ends be worm structure, be respectively threaded end 21 and following threaded end 23, the centre is the column structure 22 of diameter greater than two ends, is provided with compress gasket 6 between column structure 22 and following threaded end 23.Column structure 22 can adopt six prisms.

Referring to Fig. 2, following threaded end 23 passes Idle wheel 3 and precession cylinder body 1, compress gasket 6 is pressed on the Idle wheel 3, the upper end of column structure 22 is supported on the inner top surface of timing shell 4, and assurance timing shell 4 and part 3 relative distances, last threaded end 21 passes timing shell 4, and is fixing by nut 5, convenient simple and easy when the repair demolition timing shell.

Because Idle wheel 3 is positioned at timing shell dynamic characteristic sensitive spot position, this structure prolongs the clamping bolt 2 of this position, is used to increase the case constraint, has both saved the space, and decay case radiated noise that again can be comparatively effective is through experimental verification, respond well.

Claims

1. the timing shell mounting structure of a motor, described timing shell 4 covers on outside the engine timing system part, be connected and fixed by bolt and cylinder body (1), under timing shell (4), the Idle wheel of engine timing system (3) is fixed on the cylinder body (1) by clamping bolt (2); It is characterized in that: described clamping bolt (2) is respectively worm structure in two ends up and down, the centre is the column structure (22) of diameter greater than two ends, be provided with compress gasket (6) between described column structure (22) and the following threaded end (23), following threaded end (23) passes the mounting hole and the precession cylinder body (1) of Idle wheel (3), and compress gasket (6) is pressed on the part; The upper end of described column structure (22) is supported on the inner top surface of timing shell (4), and last threaded end (21) passes timing shell (4), and is fixing by nut (5).

2. the timing shell mounting structure of motor according to claim 1 is characterized in that: the column structure (22) in the middle of the described clamping bolt and the length sum of compress gasket (6) equal the distance of Idle wheel (3) to the inner top surface of timing shell (4).