CN209053713U - A kind of new engine cabinet - Google Patents

Abstract

The utility model discloses a kind of new engine cabinets, crank axis hole is provided in casing end face to be used for across and crank axle is installed, rotational axis hole is provided in casing end face to be used for across and rotation axis is installed, shock-absorbing mounting hole is provided in casing end face to be same as across simultaneously mounting shock absorber, cylinder head mounting surface is provided in casing end face for installing engine cylinder body, engine side cover mounting surface is provided in casing end face for installing engine side cover, crank axis hole runs through wall box, rotational axis hole is arranged below crank axis hole and runs through wall box, shock-absorbing mounting hole setting is in cabinet edge and runs through wall box, cylinder head mounting surface, engine side cover mounting surface is parallel to the horizontal plane, cylinder head mounting surface is arranged above engine side cover mounting disc, cabinet machined is formed by the die casting of aluminium alloy or almag, this is practical new It is simple that type realizes structure, and hole site is clear and positional structure is compact, and aperture, roughness precision are high, the stable function of performance.

Description

A kind of new engine cabinet

Technical field

The utility model relates to engine art, specifically a kind of new engine cabinet.

Background technique

Engine for motorcycle cabinet (or crankcase) generallys use aluminium alloy or almag through high-pressure casting into base Part, then through milling, drill and ream or bore hole and its thread-rolling screw etc. are machined, machining is mainly on cabinet Based on the processing of hole system, 90% or more of technique content is accounted for, engine case of motorcycle is generally divided into left and right cabinet, left and right cabinet After mould assembling is assembled into engine, a closed type chamber, internal main assembling gear, crankshaft, shifting cam, shift fork are just formed Deng transmission, gear, therefore, depth, aperture and its position precision of engine case body opening system processing are to driving engine The performance indicators such as stationarity, abnormal sound generate important influence, and therefore, the mechanism of engine cabinet is just particularly important, will The superiority and inferiority of cabinet mechanical processing quality is directly affected, the performance of engine housing, engine will be also directly affected.

Therefore it is simple to design a kind of structure, hole site is clear and positional structure is compact, and aperture, roughness precision are high, performance Stable engine housing, exactly inventor will solve the problems, such as.

Utility model content

In view of the deficiencies of the prior art, the purpose of the utility model is to provide a kind of new engine cabinet, it is able to achieve knot Structure is simple, and hole site is clear and positional structure is compact, and aperture, roughness precision are high, the stable function of performance.

The technical scheme adopted by the utility model to solve the technical problem is as follows: a kind of new engine cabinet comprising Crank axis hole, rotational axis hole, shock-absorbing mounting hole, cylinder head mounting surface, engine side cover mounting surface are provided with song in the casing end face Arbor hole is used for across and installs crank axle, and rotational axis hole is provided in the casing end face and is used for across and installs rotation axis, institute State be provided in casing end face shock-absorbing mounting hole be same as across and mounting shock absorber, be provided with cylinder head mounting surface in the casing end face For installing engine cylinder body, engine side cover mounting surface is provided in the casing end face for installing engine side cover, institute Crank axis hole is stated through wall box, the rotational axis hole is arranged below crank axis hole and runs through wall box, the damping Mounting hole setting cabinet edge and run through wall box, the cylinder head mounting surface, engine side cover mounting surface with level Face is parallel, and the cylinder head mounting surface is arranged above engine side cover mounting disc, and the cabinet is by aluminium alloy or almag Die casting machined form.

Further, the crank axle pore size precision is H6~H7, and surface roughness is Ra1.6~Ra0.8 μm, the circle in hole Column degree is 0.007~0.02mm, and the verticality to faying face is 0.05mm, and half right and left concentricity is 0.04mm, to the case Body faying face flatness is 0.05~0.02mm, and surface roughness is Ra3.2~Ra1.6 μm.

Further, midship shaft bearing hole is provided in the middle part of the cabinet, the midship shaft bearing pore size precision is H7, table Surface roughness is Ra1.6~Ra0.8 μm, is 0.05mm to the cabinet faying face verticality.

Further, output shaft axis hole is provided on the left of the rotational axis hole and output shaft axis hole is located at below crank axis hole, institute Stating output shaft axis hole dimensional accuracy is H7, and surface roughness is Ra1.6 μm, and the verticality to the cabinet faying face is 0.04mm, half right and left concentricity are 0.04mm.

Further, the engine side cover mounting surface flatness be 0.05~0.02mm, surface roughness be Ra3.2~ Ra1.6 μm, the cylinder head mounting surface flatness is 0.05~0.03mm, and surface roughness is Ra1.6 μm.

The beneficial effects of the utility model are:

1. the utility model is designed by using simple crankcase structure, hole is concentrated and draws close distribution, increase device to hole with The machining accuracy control in face increases stability so that mutually deepen intensity between Kong Yukong, and it is simple to realize structure, hole site Clear and positional structure is compact, and aperture, roughness precision are high, the stable function of performance.

Detailed description of the invention

Fig. 1 is the utility model topology view.

Fig. 2 is the utility model partial top view.

Description of symbols: 1- crank axis hole；2- rotational axis hole；3- shock-absorbing mounting hole；4- cylinder head mounting surface；5- engine Side cover mounting surface.

Specific embodiment

The present invention will be further illustrated below in conjunction with specific embodiments, it should be appreciated that these embodiments are merely to illustrate this Utility model rather than limitation the scope of the utility model.In addition, it should also be understood that, in the content for having read the utility model instruction Later, those skilled in the art can make various changes or modifications the utility model, and such equivalent forms also fall within application The appended claims limited range.

The utility model topology view, partial top view referring to Fig. 1 to 2 comprising crank axis hole 1, rotational axis hole 2, Shock-absorbing mounting hole 3, cylinder head mounting surface 4, engine side cover mounting surface 5, be provided in casing end face crank axis hole 1 for across and pacify Crank axis, and rotational axis hole 2 is provided in casing end face and is used for across and installs rotation axis, is provided with shock-absorbing mounting hole in casing end face 3 are same as being provided with cylinder head mounting surface 4 for installing engine cylinder body, casing end face on simultaneously mounting shock absorber, casing end face On be provided with engine side cover mounting surface 5 for installing engine side cover, crank axis hole 1 runs through wall box, and rotational axis hole is set It sets below crank axis hole 1 and through wall box, the setting of shock-absorbing mounting hole 3 is in cabinet edge and runs through wall box, cylinder Head mounting surface 4, engine side cover mounting surface 5 are parallel to the horizontal plane, and cylinder head mounting surface 4 is arranged in engine side cover mounting disc Side, cabinet machined are formed by the die casting of aluminium alloy or almag.

Crank axle pore size precision is H6~H7, and surface roughness is Ra1.6~Ra0.8 μm, and the cylindricity in hole is 0.007 ~0.02mm, the verticality to faying face are 0.05mm, and half right and left concentricity is 0.04mm, to cabinet faying face flatness For 0.05~0.02mm, surface roughness is Ra3.2~Ra1.6 μm, is provided with midship shaft bearing hole, jackshaft in the middle part of cabinet Bearing hole dimensional accuracy is H7, and surface roughness is Ra1.6~Ra0.8 μm, is 0.05mm, rotation to cabinet faying face verticality Output shaft axis hole is provided on the left of axis hole and output shaft axis hole is located at 1 lower section of crank axis hole, and output shaft axis hole dimensional accuracy is H7, table Surface roughness is Ra1.6 μm, and the verticality to cabinet faying face is 0.04mm, and half right and left concentricity is 0.04mm, engine 5 flatness of side cover mounting surface is 0.05~0.02mm, and surface roughness is Ra3.2~Ra1.6 μm, 4 flatness of cylinder head mounting surface For 0.05~0.03mm, surface roughness is Ra1.6 μm.

Crankcase is the fundamental parts of motorcycle engine, and engine cylinder is mounted on crankcase, crankshaft, clutch Axis, speed changer etc. are mounted in crankcase, and the relative position between them is substantially guaranteed that crankcase structure is multiple by crankcase Miscellaneous, technical requirements are high, and processing quality quality directly affects the assembling quality and service performance of engine and other components, crankshaft Case generally divides left part and right part, also known as left body and right body, with two positioning finger settings between the body of left and right, to guarantee crankshaft Case is air tight, and the planarity requirements of left and right body faying face are very high, and being mainly characterized by for crankcase is complex-shaped, there is several shapes Shape and position precision, surface roughness require very high plane and hole system, and that opens on the utility model wall box is all Empty all strictly to keep machining accuracy, there are also roughness, especially cylinder head mounting surfaces 4, engine side cover mounting surface 5 the two installations Face, the depth of parallelism have reached the stage of 0.03mm, and the size in aperture uses large scale, and large scale aperture is compact to be close together, circumference The reinforcing rib each other between circumference plays the role of increasing stability, and the utility model is by using simple crankcase knot Structure design, hole is concentrated and draws close distribution, increases the machining accuracy control of device to hole and face, so that mutually deepening between Kong Yukong strong Degree increases stability, and it is simple to realize structure, and hole site is clear and positional structure is compact, and aperture, roughness precision are high, performance Stable function.

Claims (5)

1. a kind of new engine cabinet, it is characterised in that: including crank axis hole, rotational axis hole, shock-absorbing mounting hole, cylinder head installation Face, engine side cover mounting surface, be provided in the casing end face crank axis hole for across and crank axle, the cabinet end are installed It is provided with rotational axis hole on face to be used for across and rotation axis is installed, shock-absorbing mounting hole is provided in the casing end face and is same as across and pacifies Damper is filled, cylinder head mounting surface is provided in the casing end face for installing engine cylinder body, is arranged in the casing end face There is engine side cover mounting surface to run through wall box for installing engine side cover, the crank axis hole, the rotational axis hole is set It sets below crank axis hole and through wall box, the shock-absorbing mounting hole setting is in cabinet edge and runs through wall box, The cylinder head mounting surface, engine side cover mounting surface are parallel to the horizontal plane, and the cylinder head mounting surface is arranged in engine side cover Above mounting disc, the cabinet machined is formed by the die casting of aluminium alloy or almag.

2. a kind of new engine cabinet according to claim 1, it is characterised in that: the crank axle pore size precision is H6~H7, surface roughness are Ra1.6~Ra0.8 μm, and the cylindricity in hole is 0.007~0.02mm, to the verticality of faying face For 0.05mm, it is 0.05~0.02mm to the cabinet faying face flatness, surface is thick that half right and left concentricity, which is 0.04mm, Rugosity is Ra3.2~Ra1.6 μm.

3. a kind of new engine cabinet according to claim 1, it is characterised in that: be provided with centre in the middle part of the cabinet Axle bearing hole, the midship shaft bearing pore size precision are H7, and surface roughness is Ra1.6~Ra0.8 μm, to the cabinet knot Conjunction face verticality is 0.05mm.

4. a kind of new engine cabinet according to claim 1, it is characterised in that: be provided on the left of the rotational axis hole defeated Shaft axis hole and output shaft axis hole are located at below crank axis hole, and the output shaft axis hole dimensional accuracy is H7, and surface roughness is Ra1.6 μm, the verticality to the cabinet faying face is 0.04mm, and half right and left concentricity is 0.04mm.

5. a kind of new engine cabinet according to claim 1, it is characterised in that: the engine side cover mounting surface is flat Face degree be 0.05~0.02mm, surface roughness be Ra3.2~Ra1.6 μm, the cylinder head mounting surface flatness be 0.05~ 0.03mm, surface roughness are Ra1.6 μm.