CN202250278U

CN202250278U - Assembled camshaft

Info

Publication number: CN202250278U
Application number: CN2011203549703U
Authority: CN
Inventors: 邹伟; 赵祥君
Original assignee: Dongfeng Motor Corp
Current assignee: Dongfeng Motor Corp
Priority date: 2011-09-21
Filing date: 2011-09-21
Publication date: 2012-05-30
Anticipated expiration: 2021-09-21

Abstract

The utility model discloses an assembled camshaft which comprises a core shaft; first cams, a high-pressure oil pump cam, camshaft journals among the first cams, a camshaft positioning structure for assembling and a signal panel are arranged on the core shaft, wherein a phase adjustment device is arranged at one end of the core shaft and is connected with the journals; two groups of first cams relative to each cylinder in position are arranged on the core shaft; each group of first cams comprise a high-lift cam and low-lift cams at two sides of the high-lift cam; and the camshaft journals are arranged between the two groups of first cams of each cylinder. The assembled camshaft is rich in function and suitable for assembling under a cold state by using a mechanical device to carry out pipe expansion. Compared with traditional parts, the camshaft has the advantages that the weight is lightened by more than 20%-40%, materials are saved by more than 30% and the cost is reduced by about 15%.

Description

Assembled camshaft

Technical field

The utility model belongs to the motor car engine component, is specifically related to a kind of camshaft of motor.

Background technique

Traditional camshaft of car engine is the structure of making through the casting forging, and the dependency structure modularity on the camshaft of this structure is poor, and weight is big, and its function is few, is not easy to change fast the engine performance design.

Summary of the invention

The purpose of the utility model is to provide a kind of light weight, processing cost is low, material property is high, functional integration is high engine cam, to overcome the defective of above-mentioned camshaft.

The technological scheme of the utility model is: assembled camshaft; It comprises mandrel, and the camshaft bearing journal, the assembling that are mounted with on the mandrel between first cam, high pressure oil pump cam, first cam are equipped with phase adjusting device connection axle journal with camshaft position structure, signal panel, mandrel one end; Two group of first cam arranged on the seat with respect to each cylinder on the mandrel; Each organizes the low lift cams that first cam comprises high-lift cam and high-lift cam both sides; Camshaft bearing journal is located between two group of first cam of each cylinder.

Be mounted with the location shaft shoulder on the mandrel at the two ends of said phase adjusting device connection axle journal; Assembling is located at the camshaft position structure by the location shaft shoulder of a side, and assembling is a ring set with the camshaft position structure, and ring set and mandrel install and fix, and the wall of ring set is provided with the installing and locating plane.

The ring set wall be provided with plane of orientation.

The end of mandrel is connected with vacuum pump and drives shaft coupling.

The camshaft structure of the utility model adopts the various unit constructions of connection on the mandrel, and the camshaft phase controlling device connects axle journal, in order to carry out the phase adjusted of camshaft; The axial positioning structure of camshaft and first axle journal integrate; Two groups of cams are arranged on each cylinder camshaft, and each group cam is divided into high-lift cam and low lift cams again, in order in needs, to drive the switching that valve carries out the height lift; In assembly process, for the ease of rotating cam axle at any time, the hexagonal structure that integrated suitable tool wrench is used in the structure; Simultaneously, in order in assembly process, directly to find the assembling phase place accurately, this patent structure is also integrated mounting structure in correct time cooperates another one to fixedly mount instrument correct time, can directly camshaft be installed under the correct phase place; When camshaft is worked, also need gather the phase angle signal of camshaft, so the integrated needed signal panel of this signal of gathering; This patent can also carry out integrated as follows aspect the function expansion: as be used under the supercharging type, can be on mandrel an integrated high pressure oil pump cam; Drive vacuum pump like needs, can assemble a driving structure in the rear end of camshaft.Its combination function is many, is applicable to adopt mechanical device to carry out expand tube, under cold state, assembles.With respect to traditional part, can make more than the camshaft weight saving 20%-40%, economical with materials is more than 30%; Reduce cost about 15%.

Description of drawings

Fig. 1 assembled camshaft basic structure schematic representation.

Fig. 2 front-end architecture partial schematic diagram.

Fig. 3 assembles with camshaft position structure schematic representation.

Fig. 4 has one group of cam schematic representation of height lift.

Fig. 5 hexagonal structure partial schematic diagram.

Fig. 6 vacuum pump driving structure partial schematic diagram.

Embodiment

Present embodiment is with in-line four cylinder natural aspiration petrol engine, and Double Over Head Camshaft is explained.

As shown in Figure 1, mandrel 7 is the fished pipes that can choose different size according to designing requirement, and all functions constitutional detail on it can be implemented multiple mode and assemble, for example the hydraulic expanding tube method under the cold state, mechanical pipe expanding method, plasticity interference assembling method etc.; Sintering process under the hot state, interference assembling method etc.

On the relative position of petrolic each cylinder of in-line four cylinder natural aspiration, be mounted with first cam 1, two group of first cam 1 arranged on the seat of each cylinder.4 camshaft bearing journals 3 are installed between two group of first cam 1.

Be fixedly connected with high pressure oil pump cam 2 in the installation of the middle part of mandrel 7; Go up installation at an end (front end) of mandrel 7 and be fixedly connected with phase adjusting device connection axle journal 6, install to be fixedly connected with on the mandrel 7 on phase adjusting device connection axle journal 6 sides and assemble with camshaft position structure 5, the camshaft position structure is a ring set 5.Also be fixedly connected with signal panel 4 on the mandrel 7.

As shown in Figure 2; The both sides that are fixedly connected with phase adjusting device connection axle journal 6 are installed on one end of mandrel 7 are provided with the location shaft shoulder 8; One section axle journal 6 cooperates with the clutch shaft bearing seat, and the maximum shaft shoulder in two places is stuck in the both sides of bearing support, is used for the whole axially locating of camshaft.What mandrel 7 ends connected is the VVT connection supporting sleeve 9 that is used to install and fix phase regulator (VVT), is furnished with oil groove above one, is used for the fuel feeding to VVT.

The location shaft shoulder 8 other being fixedly connected with inboard on the mandrel 7 are assembled with camshaft position structure 5; As shown in Figure 3, the camshaft position structure is the ring set structure, and the wall of ring set is provided with installing and locating plane 5.1; And plane of orientation 5.2, require this plane of orientation 5.2 during installation upwards.When installing and locating plane 5.1 was used to install, setting tool blocked installing and locating plane 5.1.

It is as shown in Figure 4 that each organizes the structure of first cam, and it comprises the low lift cams 1.2 on high-lift cam 1.1 and high-lift cam both sides; 3 cams can be 3 cams separately according to arranging and the machining requirement, also can be whole cams; The unitary cam of this case introduction, its advantage are that the assembling number of times of original 3 cams is reduced to 1 time, and the minimum sliding torque of cam and mandrel increases; Simultaneously, unitary cam does not have narrow and small gap each other, is prone to clean, and improves the turbidity test of part; Also have when the low lift cams of correct grinding surface, if split, just require grinding wheel width less; Not so can when the mill pin, be damaged to the side that promotion becomes; And adopt unitary cam, promotion becomes the cam bi-side to leave surplus, can not become the width of cam to impact to promotion.

Camshaft bearing journal 3 is located between two group of first cam of each cylinder.

As shown in Figure 5, in order in the installation process of camshaft, to be convenient to operation, on mandrel 7, to install and be connected with the hexagonal structure 10 that cooperates spanner.

As shown in Figure 6, the other end of mandrel 7 is connected with vacuum pump and drives shaft coupling 11.

Claims

1. assembled camshaft; It comprises mandrel, and the camshaft bearing journal, the assembling that it is characterized in that being mounted with on the mandrel between first cam, high pressure oil pump cam, first cam are equipped with phase adjusting device connection axle journal with camshaft position structure, signal panel, mandrel one end; Two group of first cam arranged on the seat with respect to each cylinder on the mandrel; Each organizes the low lift cams that first cam comprises high-lift cam and high-lift cam both sides; Camshaft bearing journal is located between two group of first cam of each cylinder.

2. assembled camshaft according to claim 1 is characterized in that said phase adjusting device connects on the mandrel at two ends of axle journal to be mounted with the location shaft shoulder; Assembling is located at the camshaft position structure by the location shaft shoulder of a side, and assembling is a ring set with the camshaft position structure, and ring set and mandrel install and fix, and the wall of ring set is provided with the installing and locating plane.

3. like the said assembled camshaft of claim 2, it is characterized in that the plane of orientation that is provided with of ring set wall.

4. assembled camshaft according to claim 1, the end that it is characterized in that mandrel is connected with vacuum pump and drives shaft coupling.