CN203879915U

CN203879915U - Variable-turning radius eccentric shaft

Info

Publication number: CN203879915U
Application number: CN201420339030.0U
Authority: CN
Inventors: 刘运武
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-06-24
Filing date: 2014-06-24
Publication date: 2014-10-15
Anticipated expiration: 2024-06-24

Abstract

The utility model discloses a variable-turning radius eccentric shaft and aims at providing an eccentric shaft which does not need liquid lubricating oil and is durable with a combined structure and a turning radius randomly changeable in a certain range. The variable-turning radius eccentric shaft is characterized in that the originally integrated eccentric shaft is changed into a combined eccentric shaft composed of an eccentric body and a crank body, one row or a plurality of rows of holes at equal intervals are drilled in each of the eccentric body and the crank body so that screws and nuts can be fastened integrally by penetrating conveniently, and the eccentric body and the crank body are embedded in each other by use of a convex strip and a groove; the crank body is moved outwards or inwards to increase or reduce the turning radius to meet the technical requirements; the crank body is composed of big and small plates at the two ends and a bearing mounting position in the middle section; in order to facilitate the mounting of a bearing to take the place of the traditional two-in-one connecting rod bearing shell, the width and thickness dimensions of the small plate of the crank body are slightly smaller than the diameter of the bearing mounting position of the middle section.

Description

The variable eccentric shaft of a kind of turning radius

Technical field

The utility model relates to mechanical transmission component, more definitely more particularly relates to for drivening rod and piston, at cylinder sleeve, do and move up and down and be applicable to a kind of eccentric shaft of other occasions or claim eccentric shaft in internal-combustion engine.

Background technique

As its name suggests, partially depart from, song is crooked, not point-blank, single eccentric shaft at least contains a crank position of departing from rotation centerline for being combined into and being slidably matched rotatably with connecting rod one headgear, its turning radius equals eccentricity, and traditional method is that its single eccentric shaft of prior art is as a whole, its structure and workmanship principle as shown in Figure 1 to Figure 3: two crank positions 1 of eccentric shaft are on contour apart 180 ⁰, wherein one is provided with drive wheel 2, and two ends come directly towards by each bearing and bearing block support and location.Because connnecting rod big end is two-in-one combining by two half of circle overcoats 4 by screw rod and nut 5, thereby can be successfully will be divided into two and two half of circle connecting rod bearing shells 6 of two-in-one are linked between crank 1 and two half of round overcoats 4.Its deficiency one is that on-stream quiet (crank is for moving because of one moving one in order to alleviate crank and connecting rod bearing shell, connecting rod bearing shell is not followed crank and is rotated to be quiet) and the relative friction of formation, therefore no matter use and an airtight trapped fuel case don't fail to be set for filling liquid lubricant oil in any occasion, once being blocked, oil starvation or oil circuit just by Yin Gaowen, burnt out; The 2nd, because connnecting rod big end is formed by two-in-one by screw rod and nut, because pine moves back, accidents happened unavoidably in running up for its screw rod and nut, and the 3rd, owing to being an integral body, once its turning radius of shaping just can not change, accommodation is narrow; In addition owing to being that integral body is again for eccentric or first to water finishing work difficulty large, or select compared with large round steel and directly go up lathe and waste many, its crank position is on-stream is relative friction with connecting rod bearing shell, once wear and tear overrun must scrap, thereby there is disadvantages such as manufacturing the high and inconvenience maintenance of cost.

Summary of the invention

The utility model is for making up above-mentioned deficiency, aim to provide a kind of solid box of can be smoothly installing in crank position for replacing two-in-one connecting rod bearing shell, except in internal-combustion engine, use need to piston and cylinder sleeve award lubricated, need not filling liquid lubricant oil in the occasion without cylinder sleeve and piston, its turning radius can change arbitrarily within the specific limits, and manufacture cost and long-lived a kind of eccentric shaft, be achieved by the following technical solutions.

By integrated type, change single eccentric shaft into combined type, the eccentric shaft of single crank position is three-in-one form with centre for being connected the crank body of two eccentric body by each eccentric body with bearing position of two, eccentric body is connected with the rectangular shape of crank body, each eccentric body of left and right is horizontal, a middle crank body for vertical each other near, crank position of every increase must increase a middle eccentric body and a crank body, by that analogy, its crank position of the eccentric shaft of two crank positions is apart on contour opens 180 ° (360 ÷ 2), three apart 120 °, by that analogy, but not getting rid of when there is a plurality of cranks position every two is one group and is on same contour, with running balance, be specifically that eccentric shaft surrounding is equal in weight and is applicable to technological requirement and is as the criterion.

The two is all drilled with the hole single row or multiple rows of same size eccentric body and crank body, wherein pertusate plate is bored for small one and large one in crank body two, intermediate section is for installing bearing position, for ease of bearing installation in position, the width of small plate is slightly less than the diameter of bearing position, by double-screw bolt and nut, wear fixed tight, move in or out crank body and just can reduce or increase turning radius, it is the distance that turning radius equals its bearing position of crank body and rotating center, for preventing from assembling in off normal and running, because moving back, nut pine is shifted, its eccentric body and crank body are each other with raised line and chase tabling, for stop disconnected from each other by raised line make wide outside and narrow inside with chase is dug into inner wide and outer narrow, can only insert from top, one end, and gap is as far as possible little, even like this nut to some extent pine move back, the two can not throw off eccentric body and crank body mutually yet.

For each bearing position of two ends does not depart from same center line, in manufacturing process, only do in advance rough turn or not car stop leeway, treat go up again lathe to each bearing position enforcement finish turning of two after each position mat woven of fine bamboo strips once assembles.

Eventually the above, its main points of the technological scheme that the utility model adopts are: its eccentric shaft is combined by eccentric body and crank body, on its plate of eccentric body and crank body, be all drilled with for interting the hole single row or multiple rows that screw rod is equidistant arrangement, Qu Bingti two ends are the one large one small pertusate plate that bores respectively, intermediate section is cylinder-shaped bearing installation position, and a little generous size of plate is less than intermediate section cylinder-shaped bearing installation position diameter; Eccentric body and crank body are each other with one outer mutually chimeric in raised line and chase one; Raised line section is wide outside and narrow inside, and chase section is inner wide and outer narrow.

The beneficial effects of the utility model one are that Applicable scope is large: be both applicable to internal-combustion engine, be also applicable to the occasion without cylinder sleeve piston; The 2nd, because selecting bearing to replace connecting rod bearing shell, be that barrel shift has been eliminated relative friction, take and connnecting rod big end overcoat as an integral body not only durable in use but also need not save a fuel reserve tank by filling liquid lubricant oil; The 3rd, turning radius can strengthen within the specific limits arbitrarily or reduce and adaptability is stronger according to technological requirement; Also exist and manufacture easily and to be convenient to the advantages such as maintenance.

Accompanying drawing explanation

Fig. 1 to Fig. 3 is that traditional method is its structure of eccentric shaft of the prior art and acting principle exploded view;

Fig. 4 and Fig. 5 are its structure of the utility model and acting principle schematic;

Fig. 6 be with crank body combination after middle eccentric body two longitudinal section demonstration figure apart from 180 ° each other on contour before and after it;

Fig. 7 be with crank body combination after its two of middle eccentric body longitudinal section demonstration figure apart from 120 ° each other on contour;

Fig. 8 be with crank body combination after its two of middle eccentric body longitudinal section demonstration figure apart from 90 ° each other on contour;

Fig. 9 is its horizontal cross-section cutaway view of eccentric body with raised line;

Figure 10 is angle square shape crank body floor map;

Figure 11 is T-shaped crank body stereogram;

Figure 12 is the floor map of Figure 11.

Embodiment

Below in conjunction with each accompanying drawing, be described further.

With reference to Fig. 4 to Figure 12, each, two is to be drilled with a plurality of holes 9 on eccentric body 7 its plates of its bearing installation position 12 of rotation centerline with centering, wherein top, one end is provided with the drive wheel 14 driving for power, the one-sided plane center of each eccentric body 7 of two and middle eccentric body 8 its plates is that raised line 15 is mutually chimeric with small one and large one plate 10 center, crank body two ends chase 16, and by screw rod and nut 13 from hole through crank body and eccentric body are tightened up and be integrated, one, front crank body in Fig. 4 is arranged on plane, one of back crank body is arranged on lower plane, eccentric shaft rotation half cycle becomes situation conversely, on, become lower and under become on, eccentric body crank body intermediate section is bearing installation position 11.

Its acting principle is: because rotation centerline certain size is departed from the bearing installation position 11 of crank body intermediate section, when bearing being arranged between bearing position 11 its outer rims and connnecting rod big end overcoat as after interior China and foreign countries fit, the on-stream connecting rod that impels is done up and down or front and back displacement, thereby is that microcephaly drives workpiece rotation or front and back (up and down) to be shifted and work done by connecting rod other end.Owing to being drilled with the hole single row or multiple rows of same distance on eccentric body and crank body, need only outward or toward interior removable crank body, just can realize and increase or reduce turning radius with corresponding technological requirement.

Claims

1. the variable eccentric shaft of turning radius, crank is biased from rotation centerline, it is characterized in that being combined by eccentric body and crank body, on its plate of eccentric body and crank body, be drilled with for interting the hole single row or multiple rows that screw rod is equidistant arrangement, crank body two ends are the one large one small pertusate plate that bores respectively, intermediate section is cylinder-shaped bearing installation position, and a little generous size of plate is less than the diameter of intermediate section cylinder-shaped bearing installation position.

2. the variable eccentric shaft of a kind of turning radius according to claim 1, is characterized in that eccentric body and crank body be take raised line and chase each other one outer mutually chimeric in one.

3. the variable eccentric shaft of a kind of turning radius according to claim 1 and 2, is characterized in that raised line section is wide outside and narrow inside, and chase section is inner wide and outer narrow.