CN203717056U - Combined type camshaft - Google Patents

Abstract

The utility model relates to a camshaft, and particularly relates to a combined type camshaft. Bearings are arranged at the two ends of the camshaft in a sleeving manner, a driving gear is fixedly connected with one end of the camshaft, a shaft hole is formed in a cam, the pore diameter of the shaft hole is larger than the external diameter of the camshaft, four inlay grooves are formed in the inner wall of the shaft hole, and the included angle between each two adjacent inlay grooves is 90 degrees; after the camshaft and the shaft hole are connected in a sleeving manner, the diameter expanding is conducted, and the outer wall part of the camshaft is pressed into the inlay grooves to form protruding limiting fixing blocks used for fixing in the circumferential direction, parts, positioned on the two sides of the cam, of the camshaft protrude to form axial limiting grooves, so as to clamp the cam on the camshaft. According to the structure of the camshaft, the cam and the camshaft are connected in a sleeving manner, the diameter expanding is conducted on the camshaft, the fixing blocks are formed in the inlay grooves in the inner wall of the shaft hole of the cam, and parts, positioned on the two sides of the cam, of the camshaft protrude to form the axial limiting grooves, so that the structure is compact; the cam and the camshaft can be manufactured by different materials, so that the cost is reduced; meanwhile, through the assembly structure, components can be casted independently, and then the assembly and connection can be conducted, so that the processing difficulty is reduced.

Description

Combined type camshaft

Technical field

The utility model relates to a kind of camshaft, especially a kind of combined type camshaft.

Background technique

Camshaft is one of vital part of motor, and the hardness of position, camshaft peach tip and the white layer degree of depth are the key technical index that determines camshaft working life and engine efficiency.Ensureing that cam has under the prerequisite of sufficiently high hardness and quite dark white layer, also should consider that higher carbide does not appear in axle journal, make it have good machinability.

Camshaft is the parts of important intake and exhaust control, conventionally having two or a camshaft is arranged in motor, the main method of producing camshaft both at home and abroad has: adopt steel rough forging after cutting, nose part forms the namely one processing of technique of Malpighian layer through high frequency hardening, because the requirement of strength of cam is different from camshaft, because both frictions, the task difference that load-bearing etc. need to be born, due to one processing, process very loaded down with trivial details, and cam is identical with the material of axle, will be according to the Standard Selection of cam, therefore produce in the market camshaft structure, cost compare is high, process loaded down with trivial details.

Summary of the invention

The purpose of this utility model is, provides that a kind of cost is low, the simple combined type camshaft of processing and assembling.

The utility model solves the technological scheme that its technical problem adopts: a kind of combined type camshaft, comprise camshaft, on camshaft, be provided with two cams, one as intake cam, another is as exhaust cam, at the sheathed bearing in camshaft two ends, one end is fixedly connected with an actuation gear, cam is provided with an axis hole, aperture is greater than the external diameter of camshaft, shaft hole inner wall offers four embedding grooves, between embedding groove, be spaced apart 90 degree, after camshaft and axis hole socket, carry out hole enlargement, the outer wall section of camshaft is pressed into embedding groove, be formed for the circumferentially fixing spacing fixed block of projection, the part that is positioned at cam both sides on camshaft convexes to form axial restraining groove, cam is stuck on camshaft.

Of the present utility modelly further be set to: also comprise strengthening groove, reinforced block, on the inwall of axis hole, offer the cavity that a cross section is inverted trapezoidal, towards the part opening of shaft hole inner wall, as strengthening groove, after camshaft hole enlargement, enter the part in strengthening groove, form a trapezoid block, as reinforced block, strengthening groove is arranged on the both sides of embedding groove in nose direction, one one of side, and be 45 degree angles with this embedding groove.

Said structure is socketed cam and camshaft, then camshaft is carried out to hole enlargement, in embedding groove on the shaft hole inner wall of cam, form fixed block, keep circumferential fixing, and the part projection of cam both sides, form restraining groove, cam is carried out axial spacing, and utilize strengthening groove and reinforced block to reinforce, compact structure, and cam can be different from the material of camshaft, thereby reduce costs, this socket join structure simultaneously, can cast separately single parts, then carry out assembly connection, reduce overall difficulty of processing, certainly strengthening block structured effect is not only in order to reinforce, in camshaft work, because peach point is for driving exterior part part, therefore stressed heavier, especially the part of peach point both sides, and it is just corresponding with forced section to strengthen block structured position, therefore, in stressed, reinforced block structure is also stressed, and compress, cam is connected more firm with camshaft, the time that is in theory work is more of a specified duration, structure is compacter, there will not be loosening phenomenon.

Brief description of the drawings

Fig. 1 is the structural representation of the present embodiment;

Fig. 2 is the schematic diagram of hole enlargement not after the socket of cam and camshaft;

Fig. 3 is the schematic diagram after cam and camshaft socket hole enlargement;

Fig. 4 is the planimetric map of cam and camshaft socket;

Embodiment

With reference to figure 1, Fig. 2, Fig. 3, Fig. 4 is known, a kind of combined type camshaft of the utility model, comprise camshaft 1, on camshaft, be provided with two cams 11, one as intake cam, another is as exhaust cam, at the camshaft 1 sheathed bearing 2 in two ends, one end is fixedly connected with an actuation gear 3, cam 11 is provided with an axis hole, aperture is greater than the external diameter of camshaft 1, shaft hole inner wall offers four embedding grooves 111, between embedding groove 111, be spaced apart 90 degree, after camshaft 1 is socketed with axis hole, carry out hole enlargement, the outer wall section of camshaft 1 is pressed into embedding groove 111, be formed for the circumferentially fixing spacing fixed block 12 of projection, the part that is positioned at cam 11 both sides on camshaft 1 convexes to form axial restraining groove 13, cam 11 is stuck on camshaft 1, on the inwall of axis hole, offer the cavity that a cross section is inverted trapezoidal, towards the part opening of shaft hole inner wall, as strengthening groove 112, after camshaft 1 hole enlargement, enter the part in strengthening groove 112, form a trapezoid block, as reinforced block 14, strengthening groove 112 is arranged on the both sides of embedding groove 111 in cam 11 peach point directions, one one of side, and be 45 degree angles with this embedding groove 111.

Obviously, above-described embodiment is only used to done giving an example is clearly described, and the not restriction to mode of execution.To those of ordinary skill in the art, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all mode of executions.And the apparent variation of being extended out thus or variation are still in protection domain of the present utility model.

Claims (2)

1. a combined type camshaft, comprise camshaft, on camshaft, be provided with two cams, one as intake cam, another is as exhaust cam, at the sheathed bearing in camshaft two ends, one end is fixedly connected with an actuation gear, it is characterized in that: cam is provided with an axis hole, aperture is greater than the external diameter of camshaft, shaft hole inner wall offers four embedding grooves, between embedding groove, be spaced apart 90 degree, after camshaft and axis hole socket, carry out hole enlargement, the outer wall section of camshaft is pressed into embedding groove, be formed for the circumferentially fixing spacing fixed block of projection, the part that is positioned at cam both sides on camshaft convexes to form axial restraining groove, cam is stuck on camshaft.

2. according to combined type camshaft claimed in claim 1, it is characterized in that: also comprise strengthening groove, reinforced block, on the inwall of axis hole, offer the cavity that a cross section is inverted trapezoidal, towards the part opening of shaft hole inner wall, as strengthening groove, after camshaft hole enlargement, enter the part in strengthening groove, form a trapezoid block, as reinforced block, strengthening groove is arranged on the both sides of embedding groove in nose direction, one of a side, and be 45 degree angles with this embedding groove.