Connecting link for tire chains

Beginning of the patent period: April 15, 1969.

The invention relates to a link for tire chains with provided for adjacent chain links receiving openings, of which at least one outwardly leading Einhängeöffnung has, and with a longitudinally displaceable in a guide passage, the Einhängeöffnung shut-off locking bolt.

It is known a link, the spring-loaded and seated on limiting pins locking bolt the operating loads or wear of a tire chain would not cope. Should this link be made detachable, the hitch would have to be located on the side of the wear surface so that the striker would be exposed to exceptionally high loads, especially if the wear surface is partially worn.

There are also screw fasteners for an insert known, but which can not be arranged on the wear surface, otherwise they would wear and loosen, which would destroy the entire link.

The invention has the object of providing a connecting member of the type described above in such a way that it is at any time, even in very worn condition, again solvable.

In a link for tire chains with provided for adjacent chain links receiving openings, of which at least one has a leading out Einhängeöffnung, and with a longitudinally displaceable in a guide passage, the Einhängeöffnung shut-off locking pin according to the invention, the guide passage of the wear surface is substantially perpendicular to the same, where it opens freely on the opposite side and the locking pin a

Has press fit within the guide opening. This ensures that the locking pin can be used by the wear surface. The locking bolt can be beaten at any time from the wear surface through the guide passage, whereby the connecting member can be solved. When wear of the connecting member due to wear, the locking pin uses to the same extent as the wear surface, without thereby affecting the strength of the locking bolt or his

Solubility would be impaired. The locking bolt may be formed in a simple manner as a spiral, heavy tension or grooved pin.

According to a further feature of the invention, the length of the locking bolt is only slightly larger, preferably equal to or smaller than the extension of the connecting member measured in the longitudinal direction of the guide passage minus the length of the guide passage, so that the locking bolt can be driven so far from the wearing surface, that it comes out of engagement with the guide passage on the connecting member and is thereby released from this. This operation can be carried out even when launched on a motor vehicle tire tire chain without damage to the tire are to be feared.

In a further embodiment of the invention, the connecting member has a single, preferably slot-shaped receiving opening 35, whose one-sided suspension opening is closed off by the locking bolt, which in the direction of the suspension opening from the guide opening - 2 -

No. 277,789 protruding part is supported on one side in its entire length. As a result, a very high strength of the connection to be produced by the connecting member is achieved with a simple construction of the connecting member.

A particularly advantageous development of the subject invention is that at least one boundary surface of the suspension opening inclined projects into the path of movement of the locking bolt, so that the locking pin is deflected when hitting this boundary surface and braced against this boundary surface.

In another advantageous embodiment of the subject invention, the suspension opening is arranged approximately in the middle of the receiving opening, wherein the guide passage for the locking pin is also in the middle of the tread, the suspension opening opposite, arranged so that two or more chain links through one and the same Einhängeöffnung introduced and can be prevented by one and the same locking pin on the release of the link.

The invention will be explained in more detail below with reference to the embodiments illustrated in the drawings. 2 shows the connecting member according to FIG. 1 in the closed state, FIG. 3 shows a section along the line III-III according to FIGS. 2, 4 and 5 a further embodiment of a connecting member in representations according to Figures 2 and 3, Figure 6 shows another link in side view, Figure 7 is a section along the line VII-VII in Figure 6, 8 shows the connecting member according to Figure 6 in plan view and Figure 9 is a section along the line IX-IX in Figure 6.

As shown in Fig.l to 3, an inventive link -1- is designed as a substantially planar web member having a slot-shaped receiving opening -2- to be hooked chain links. The receiving opening -2- is the eccentric to the crowned tire bearing surface -3- of the connecting member -1- out in this.

The cross-sectionally roof-shaped running surface - 4-, which forms the wear surface, having web portion -5- of the connecting member -1- is in cross-section substantially trapezoidal, such that its side surface -6- to the receiving opening -2- or the tire contact surface -3- towards each other at an acute angle. Characterized in that the receiving opening -2- is provided eccentrically in the connecting member -1-, the wear surface -4- having web portion -5- has a greater height than the tire bearing surface having web portion -7-. The side surfaces -9- of this web part -7- are also partially circular in shape such that the web part -7- in cross-section is approximately elliptical or langrund. The corner regions -8- of the substantially rectangular connecting link -1- are highly rounded in the shape of a quarter circle.

As Fig.l also shows symmetrically to the longitudinal center of the tire contact surface -3- having web portion -7- a suspension opening -10- is provided, which is formed by an interruption of the web part -7- or a two-part design of this web part -7- , The mutually facing end surfaces -11- of the two freely projecting web leg -12- lie in mutually parallel planes and inclined to the plane of the connecting member -1- and approximately perpendicular to its running plane.

In the longitudinal center of the wearing surface -4- having web portion -5- of the connecting member -1- is perpendicular to the running plane as a guide passage a bore -13- provided in which a closing pin -14- is guided slidably with a press fit. The longitudinal axis of the lock pin -14- or the bore -13- is symmetrical through the center of the insertion hole -10-, this insertion opening -10- is greater than the diameter of the lock pin -14-.

In the starting position, the rear end -15- of the closing pin -14- protrudes beyond the wearing surface -4- of the connecting link -1-, such that the front end of the closing pin -14- extends outside the receiving opening -2- of the connecting link -1- lies. After insertion of chain links to be connected through the insertion hole -10- in the receiving opening -2- of the connecting link -1- the locking pin -14- with a hammer by applying its rear end -15- as shown in Figure 2 in the receiving opening - 2- driven, so that two separate individual receiving openings -2a are formed, from which the hinged chain links, not shown, can not solve themselves, since the distance of the front end -15a- of the locking pin -14- of the web legs -12- is smaller than the corresponding cross-section of these hinged chain links. In its closed position, the rear end closes -15- flush - 3 -

No. 277878 with wear surface -4- of the connecting link -1-.

To remove the locking pin -14- from its closed position according to Figures 2 and 3, the locking pin -15- through the through-hole -13- and the insertion opening -10- beaten so that the hinged in the connecting member -1- chain links of the Link -1- can be solved. The thus released locking pin -14- can then be used by the Verschließfläche -4- of the connecting member -1- forth in the hole -14-.

Since the locking pin -4-, as Figure 3 shows, is within the level of the web-shaped connecting member -1-, a violation of the locking pin -14- when using the connecting member -1- largely excluded.

In the embodiment shown in Figures 4 and 5, the side surfaces -6a- of the link -La- are inclined over its entire height to each other, the tire contact surface -3a is also executed crowned. The web-shaped connecting link -la- has on one side a continuous, over the entire circumference closed receiving recess -2b- for a chain link, whereas on the other side an elongated receiving opening -2c- is provided, into which an approximately in the longitudinal center of the connecting member -La- lying Einhängeöffhung -10a- opens. The Einhängeöffhung -10a- is slightly inclined in the longitudinal direction of the link -la- to its running plane. In which the wear surface -4a having web portion -5a of the connecting link -la- a corresponding to the suspension hole -10a- inclined through-hole -13a- is provided in which a closing pin -14a is guided with a press fit so displaceable that the connection between the receiving opening -2c- and the suspension opening -10a can be closed so far that a hooked into the receiving opening -2c- chain link can not be unhooked. On the closed receiving opening -2b- facing side, the connecting member -14a- on a support surface -16-, on which the locking pin in each position is applied, so that the locking pin -14a- is securely supported on this side over its entire length. In the embodiment according to Figures 4 and 5 is a single hook member, wherein the hook through the receiving opening -2c- and the suspension opening -10a- or these limiting parts is formed.

FIGS. 6 to 9 likewise show a single-hook member -ld-. The suspension hole -LOd- also has on the side facing away from the hook on an inclined surface -16d-, but this surface is inclined in contrast to the embodiment of Figure 4 to the free end of the hook. The through-hole -13d- for receiving the locking pin is perpendicular to the wearing surface -4d- of the connecting member provided such that the locking pin with its free, -2d- lying in the receiving end end on the inclined surface -16d- can strike. In this case, it is possible to proceed in such a way that, after touching the inclined surface -16d-, the locking pin is driven further into the bore -13d-, so that the free, in the receiving opening -2d- or the insertion hole -LOd- lying end of the locking pin is approximately parallel to the surface -16d- is bent and closes the insertion hole -LOd-. As FIG. 7 shows, the hook member -ld- has a double trapezoidal cross-section, wherein the wear surface -4d- has a greater width than the tire abutment surface -3d- and the side surfaces -6d- point approximately towards the center of the receiving opening -2d Angle inclined to run towards each other. The wear surface -4d- having web portion -5d- is in cross-section substantially trapezoidal, but the wear surface -4d- formed by two at an obtuse angle to each other inclined symmetrical median plane of the member lying individual surfaces; the web surface having the web part is oval in cross-section. As shown in FIGS. 8 and 9, the web portion 5d is widest at about the midpoint of its longitudinal extent, with the side surfaces 6d extending from this widest point to the ends of the member inclined towards each other. By contrast, the web part having the tire contact surface -3d has the same width over its entire length, as shown in FIG.