CN1055320A

CN1055320A - Tire assembly drum

Info

Publication number: CN1055320A
Application number: CN 91103259
Authority: CN
Inventors: 王玉新; 张勇
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 1991-05-24
Filing date: 1991-05-24
Publication date: 1991-10-16
Anticipated expiration: 2006-05-24
Also published as: CN1020686C

Abstract

A kind of space saver tire assembly drum, this kind assembly drum be at the initial stage of lamination process, and its superimposed relatively a pair of drum watt circumferential relative velocity is approximately zero, promptly watt radially shrinks with respect to big drum at superimposed initial stage side drum tilt.Therefore in contraction process, do not cut between big drum watt and the side drum tilt drum shoulder surface and frustrate phenomenon, thereby improve body cord along the uniformity that circumferentially distributes.Simultaneously, owing to adopted two circumference cloth watt modes, it is folding, and frequently MX type assembly drum is big.The assembly drum of this kind structure has simplicity of design, and is easy to manufacture, and the applied range characteristics are particularly suitable for the moulding of high-quality radial-ply tyre.

Description

Tire assembly drum

The invention belongs to the category of tire building industry, is a kind of mould of tire building, and this assembly drum can be applicable to the moulding of radial-ply tyre and the moulding of engineering tire.Simultaneously, also can be used as the alternative upgrading products of oblique tire assembly drum.

At present, spendable assembly drum is generally the inertia folding drum in China's tire building industry, this folding drum drum watt surface relative velocity tangentially in folding process is bigger, rousing at superimposed initial stage fetus inwall under the effect of watt surperficial relative motion, the fetus inwall is produced serious cutting frustrate squeezing action, the idiosome inwall produces projection and peels off, destroyed casing ply along the uniformity that circumferentially distributes, particularly for radial, its casing play＜or claim enhancement Layer cord parallel with tire axle, cut when frustrating squeezing action at the carcass inwall, even more serious to cord along the inhomogeneity extent of damage that circumferentially distributes.

Domestic six watts, eight watts, nine watts, ten watts, 12 watts of four watts, the six watts collapsible assembly drums of ellipse and MX type assembly drums＜have etc. that have commonly used〉two kinds of structural shapes.Some producers use the assembly drum of MX type assembly drum as radial-ply tyre.The assembly drum of above-mentioned two kinds of forms all exists serious cutting to frustrate in lamination process, peels off phenomenon.

From the situation that external moulding is applied for a patent, it is taken turns the fetalism drum and mainly contains three classes from version: MX type, MCX type and ML type.The MX type is a rotary folding type, generally is used for the moulding of oblique tire, seldom is used for the radial-ply tyre moulding, is on the verge of to eliminate; The MCX type be pneumatic link-type radially moulding shrink drum because the assembly drum of this kind structure need＜main shaft supporting with special make-up machine is needed boring, ventilation source 〉, limited its application on make-up machine at home; The ML type is a cam link formula structure, this complex structural designs, and difficulty of processing is big, the cost height, the life-span is low, and the carcass Forming Quality is poor, only is used for small-sized radial-ply tyre moulding.

The object of the invention is to address the above problem, and the one, utilize domestic existing folding former to realize the radial contraction of assembly drum, overcome the generation of MX type and ellipse tire assembly drum and cut the shortcoming of frustrating, peeling off; The 2nd, the designed assembly drum of the present invention all adopts linkage, and it has simplicity of design, easy to maintenance, the advantage of long service life; The 3rd, adopt two circumference cloth watt modes, can utilize cloth watt space fully, make folding relatively MX assembly drum big, and utmost point root profile be a circle during its contraction state.

Describe the structure of assembly drum in detail below in conjunction with accompanying drawing.

Figure one is the cutaway view of assembly drum under deployed condition.

Figure two is assembly drum front views under closed state.

Figure three is assembly drum transverse cross-sectional view under deployed condition.

Figure four is movement locus figure of the superimposed expansion of assembly drum.

Shown in figure one, member (5) (4) can be connected by flat key and forming machine main spindle, provides power source to assembly drum.Member (4) and member (5) pine are nested together, and make the two keep one under the assembly drum deployed condition by alignment pin.When assembly drum is superimposed, take off alignment pin, member (4) and member (5) produce relative rotation, thereby drive other connecting rod, make assembly drum finish superimposed and expansion.

Member (22) is hinged with bearing pin (6) and member (5), member (20) is hinged with bearing pin (21) and member (4), member (22) is hinged with bearing pin (16) and member (20), and member (4) (5) (22) (21) constitutes a four-bar linkage.This mechanism is the basic rod member group of assembly drum motion.Member (17) is hinged with bearing pin (18) and little tile fragment (19), and member (14) is hinged with big watt (7), little watt (19) respectively with bearing pin (12) (15).Member (17) (14) (13) and little tile fragment (19) constitute a four-bar linkage, with basic rod member group be public component with member (17), i.e. member (17), (22) are integral member.Member (9) is hinged with big watt (7) and member (11) respectively with bearing pin (8) (10), constituted another four-bar linkage by big watt (7) and member (9) (11) (13), with basic bar group be public component with member (13), member (13) (20) is an integral member, be that member (11) (7) (22) is integral member, and member (13) (20) also is a member, these two integral member are hinged with bearing pin (16), and member (13) and member (14) are articulated in bearing pin (12) jointly and locate.

Shown in figure two, this kind assembly drum big drum when closed state watt leans on each other mutually, constitutes the outline that is approximately circular, shrinks inside in big drum watt, the interior profile that side drum tilt constitutes fully with side drum tilt that big drum watt is connected with connecting rod

Also be approximately circular.

For making assembly drum have bigger rigidity under deployed condition, member during expansion (9) (11) should be in the straight line state.

For making the superimposed initial stage of assembly drum, (shown in figure four) side drum tilt watt has bigger radial contraction with respect to big drum, and the angle between the member (17) (22) is approximately 90 °.When member (5) rotates, the tangential velocity of bearing pin (6) makes to have maximum angular speed with bearing pin (16) for the member of relative pivot (22), make the angle approximately equal of member (14), member (17) and member (13) simultaneously, thereby guarantee superimposed initial stage side drum tilt (19) with respect to member (13) instant translation, the side drum tilt that makes (19) watt has bigger radial contraction with respect to big drum.

When closed state, shown in figure two, member (5) member (22) forms sharp angle, to guarantee having bigger close launching garden arc track that the garden arc track of initial stage bearing pin (18) when bearing pin (18) rotate and bearing pin (18) rotate around bearing pin (21), when member (20) is rotated with respect to forming machine main spindle, member (7) has minimum angular speed with respect to member (20), promptly at the expansion initial stage, side drum tilt (19) is followed member (20) and is rotated together, with respect to big drum minimum radial development watt is arranged.The triangle that is surrounded with bearing pin (8) (10) (12) makes bearing pin (12) to the distance of bearing pin (10) bigger increase be arranged at the expansion initial stage, make big drum watt (7) bigger expansion be arranged, thereby launch to provide necessary space for side drum tilt with respect to side drum tilt (19).

Watt be expanded to the trajectory diagram of closed state below in conjunction with a pair of drum of the assembly drum shown in the figure four, the course of work of assembly drum is described.

Suppose to rotate counterclockwise at deployed condition compacted under drum, cut off the main shaft power source when superimposed, and make main shaft counter-rotating, open brake apparatus and make member (4) stall, member (5) drive member (22) (17) make side drum tilt (19) relatively big drum bigger radial contraction amount＜see figure four watt is arranged.The position of little tile fragment is after angle is divided equally in relative rotation with member (22), the tracing point that obtains successively.Can be clear that by figure four turn under the situation of equal angular little watt of distance of shrinking at first at member (22) bigger, then, along with the increase of member (22) (20) relative rotation, each drum of assembly drum watt is contracted to closed state gradually.

The best applications of this invention is the assembly drum that is used for radial, also can be used for the moulding of engineering tire, can also be used for the more new product that substitutes of oblique tire assembly drum.

Claims

1, a kind ofly drum watt and its guide mechanism are formed by some, by member [4] [5] relatively rotation make drum watt superimposed with the space saver tire assembly drum that launches, form by drum wall [3] drum shoulder [2] cover plate [1] and linkage, it is characterized in that: adjacent a pair of drum watt [7] [19] link by connecting rod [14], and its guide mechanism is that member [4] [5] [20] [22] [7] [9] [11] [14] [17] [19] [13] is formed.

2, a kind of according to right 1 desired assembly drum, it is characterized in that: big drum watt (7) links to each other with (13) with connecting rod (9) respectively by pivotal motion pair (8) (12), and little watt (19) are connected with connecting rod (14) (17) respectively with (18) by pivotal motion pair (15).

3, a kind of according to right 1 assembly drum that requires, it is characterized in that member (4) (5) (20) (22) constitutes four-bar linkage.

4, a kind of according to right 1 assembly drum that requires, it is characterized in that: member (13) (14) (19) (17) constitutes four-bar linkage.

5, a kind of according to right 1 desired assembly drum, it is characterized in that: member (7) (9) (11) (13) constitutes four-bar linkage.

6, a kind of according to right 1 desired assembly drum, it is characterized in that: big drum watt (7), the public pin joint of connecting rod (13) and connecting rod (14) is (12).

7, one according to right 1 desired assembly drum, and it is characterized in that: member (13) (20) is same rod member, and member (11) (17) (22) is same rod member.

8, a kind ofly require assembly drum according to right 1, it is characterized in that: the pin joint of member (20) and (22) is (16).