JPS6129864B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is suitable for use in the initial steps of installing bias tire frames and installing radial tire frames for heavy duty applications.

(e.g. Soviet Patent No. 187219, c1.39a
6 17/16) tire manufacturing drums are known.

The drum is comprised of a sector with a fixed shoulder and a sector with a movable shoulder. The drum sectors are arranged in a uniform alternating manner and are connected by levers pivoted to a device for moving the drum sectors and to a stationary transverse section provided on the drum hub. Each device for moving the sector of the drum consists of two parts with an annular sliding member. The annular sliding member is connected to a screw drive and is connected by another lever to the pivoted lever. With this connection, the sliding parts of the device for moving the sectors of the drum simultaneously move in the same direction to one side along the axis of the screw device, imparting a rotational movement to the lever and the drum being retracted or Expand. During such movement of the lever, the sector of the drum undergoes radial and axial movement.

This movement of the drum sector during drum deflation can cause damage to the inner surface of the tire frame. Furthermore, the axial movement of the drum sector increases the axial dimensions of the drum during deflation, thereby increasing the overall dimensions of the entire tire building apparatus.

During retraction, a transverse section is provided on the drum hub, and the movable shoulder moves through the retraction stroke of the drum, increasing its radial dimension, which means that the specially shaped shoulder , which limits the possibility of using drums with various frame attachments.

Furthermore, the pivot of the lever coupling member is disposed in a groove provided in the drum sector, and the gap prevents the drum sector from moving during drum expansion, so that the drum sector is provided with a rigid enclosure. cannot be combined to form a Therefore, in order to hold the sector of the drum fixed during drum expansion, the pivoted lever is locked by a manual locking device.
Therefore, automation of tire frame installation and removal is not possible.

The aim of the invention is to eliminate the above-mentioned drawbacks.

The main object of the invention is that the drum sector has only a radial movement and that during the retraction stroke of the drum the drum sector, i.e. initially having a movably provided shoulder, then It is an object of the present invention to provide a tire manufacturing drum in which a sector of the drum having a fixed shoulder is continuously moved radially. The foregoing features of the invention significantly reduce the overall size of the drum in the deflated state, increase the range of drum frame types that can be mounted on the drum, improve labor efficiency, and increase tire frame quality.

The above object and other objects provide a tire manufacturing drum comprising a drum sector having a fixedly mounted shoulder and a drum sector having a movably mounted shoulder, the drum comprising: a drum sector having a fixedly mounted shoulder; The sectors are provided with every other identical device for moving the sectors, each of said devices being connected to a screw drive and mounted on the hub of said drum and movable in the longitudinal direction of the drum. In a two-part device having an annular sliding member and a lever articulated to the sector of the drum and the sliding member, the sliding member is mounted on the drum hub cooperating with a member of the device for moving the sector of the drum. A lever having a toothed sector wheel, arranged coaxially with the hub and movable separately in mutual or opposite directions, connects said members of each device for moving the sectors of the drum. This is achieved by tire manufacturing drums that are arranged so that they are always in mesh with each other.

This arrangement of sliding members allows the members of each device for moving the sector of the drum to run at the same speed. The interconnection of the parts of each device allows both the drum sector with fixedly mounted shoulders and the drum sector with movably mounted shoulders to be moved only in the radial direction. This makes it possible to reduce the axial dimension of the drum during deflation, and likewise to reduce the overall dimension of the tire manufacturing machine. Furthermore, the inner surface of the tire frame is prevented from being damaged when the tire frame is removed from the drum. Also, the axial rigidity of the drum is increased.

Because the sliding members are coaxially arranged and can move together or separately, only the sector of the drum with the movably mounted shoulder is traveling during the initial stroke of drum retraction. can do. This feature precludes the immobilization of the drum sector, and reduces the radial travel between the drum sector with movably mounted shoulders and the drum sector with fixedly mounted shoulders. give the necessary distinction.

According to the present invention, the drum hub is provided with a longitudinal groove and accommodates a conventional screw drive device consisting of a screw member having a right-handed thread and a left-handed thread, and two nuts; is fixed to the sliding member of the member of the device for moving the sector of the drum having a movably provided shoulder through an intermediate element that fits through the longitudinal groove of the drum hub, and further between the nuts. A stop member is provided on the threaded member, and the corresponding member is provided with a protrusion that interacts with a protrusion provided on one end face of the nut.

To reduce the size of the slide member drive, a longitudinal groove in the drum hub allows the screw drive to be accommodated within the hub. By providing an intermediate element that fits through the longitudinal groove of the drum hub, the sliding members in each member of the device for moving the sector of the drum are prevented from rotating relative to each other;
In this way a stable position of all drum sectors is obtained. A butt member having a protrusion that interacts with a protrusion on one end face of the nut provides self-tightening of the threaded pair on the end of the nut.

The invention further provides a drum having a fixedly provided shoulder, wherein the sliding member cooperating with the member of the device for moving the sector of the drum is provided with flanges that interact when the slides move together. a sliding member cooperating with a member of the apparatus for moving the sector, the sliding member cooperating with a member of the apparatus for moving the sector of the drum having a movably provided shoulder for axial movement over the sliding member cooperating with a member of the apparatus for moving the sector; It is characterized by its placement.

By providing the sliding member with a rib-shaped projection and an arrangement for relative movement in the axial direction, the fan-shaped portions of the drum can be moved sequentially without interference (overlapping) and catching. Become.

The invention also provides an adjustment screw on the collar on the sliding member that cooperates with a member of the device for moving the portion of the drum having a fixed shoulder.

Said adjustment screw provides a means of compensating for manufacturing defects and wear of the movable joint, as well as a means of obtaining the required joint force on the drum parts to form the entire cylindrical drum surface. .

The invention also provides that a toothed sector wheel mounted on a member of a device for moving a sector of a drum having a movably mounted shoulder is provided with a device for moving and resting said shoulder; It is characterized by being connected to the shoulder and toothed fan wheel.

This constructional arrangement eliminates trapping of the drum sector during the drum retraction stroke and still provides the necessary movement and rest of the drum section shoulders by means of a continuously moving pivot lever. Said pause eliminates the restriction of the travel of other parts of the device for moving the sector of the drum and the overlap of shoulders within the drum during drum retraction, and also obtains a minimum radial dimension of the drum during drum retraction. This makes it possible to provide the necessary shoulder position.

According to an embodiment of the invention, the respective devices for moving and resting the shoulders are formed by an arcuate groove provided in the sector of the drum and a link whose length is adjustable and which is articulated in the shoulder. and an intermediate link having a pin articulately connected between the link and the toothed sector wheel and arranged to fit in the arcuate groove.

This structural arrangement reduces the radial dimensions of the drum in its retracted state, eliminates the trapping of movable and fixed shoulders at the beginning of drum retraction, and also eliminates the need for a continuously moving shoulder. A movably provided shoulder can be stopped by a pin fitted into an arcuate groove by the attachment lever.
An adjustable length link is provided to determine the appropriate drum width for the tire frame dimensions.

In a further embodiment of the invention, the respective devices for displacing and resting the shoulders are constructed in the form of articulated links and toothed racks, the length of said links being adjustable. Also, the toothed rack is provided with an arcuate recess and meshes with a toothed sector wheel having a projection that fits into the arcuate recess in the toothed rack. This structure allows the drum sector with movable shoulders to be compact.

Preferably, the projections of the toothed wheels corresponding to the arcuate recesses of the toothed racks are arranged at different positions from the center of the respective toothed wheel, measured along the axis of the drum. The arrangement described above allows for differential movement of the shoulders to eliminate overlap of the shoulders of adjacent drum sectors during drum retraction. This also eliminates trapping of the drum and avoids shoulder cutouts. As a result, the quality of tire frame mounting is improved.

The invention is further characterized in that adjacent drum sectors with fixedly and movably mounted shoulders are connected inside the sector by means of pivoted links. With this configuration, the drum sector with fixedly mounted shoulders can be arranged axially with respect to the drum sector with movably mounted shoulders, so that shoulder overlap and It is possible to avoid being caught by the fan-shaped part of the drum.

Furthermore, the present invention provides an abutment member such that a sector of the drum having a movably mounted shoulder contacts an adjacent sector of the drum during expansion of the drum, while a stationary shoulder is provided. The sector of the drum having an incline is provided with inclined guide members, between which the abutment member is arranged. When the drum expands, the sectors are locked by the abutment members to form an overall arcuate enclosure. Structural stiffness is increased and the applied loads are shared by all sectors. An inclined guide member provided on the sector of the drum having a fixedly provided shoulder defines the radial position of the sector of the drum having a movably provided shoulder. In this way it is possible to reduce the wear of the pivot lever abutment on the relative radial position of the sector of the drum and thus to extend the service life of the drum.

Preferably, an idler gear is provided on the toothed sector for the sector of the drum with a fixed shoulder.

In this manner, the tire building drum constituting the present invention has a high shrinkage coefficient despite having no removable sector shoulder. As the drum contracts, its shape approaches a cylinder with a diameter smaller than the beaded diameter of the tire. This reduces manual labor and provides a mechanized and automated method for removing installed tire frames, while improving tire installation quality and increasing operational efficiency.

Since the drum is made up of fan-shaped sections with similar structures and features, manufacturing is easy and labor is saved. Since it is adjustable, it can be used for a long time without repair. This drum can be used for various types of tire frames, especially for heavy duty tire frames.

The present invention will be described in detail with reference to the accompanying drawings.
The tire manufacturing drum according to the invention has a drum sector 1 (FIG. 1) with a fixedly provided shoulder 2 and a drum sector 3 with a movably provided shoulder 4.
a device consisting of two identical parts 5 and 6 for moving a drum sector 1 with a fixedly mounted shoulder 2; and a drum sector 3 with a movably mounted shoulder 4. It consists of a device consisting of two identical members 7 and 8 for moving the drum, and a drum hub 9 formed in the shape of a hollow shaft and connected to a hollow drive shaft 10 (shown in thin lines).

The drum hub 9 (FIG. 2) has a longitudinal groove 11.
It also accommodates a normal screw drive device consisting of a screw member 12 with right-handed and left-handed threads, and two nuts 13 and 14 with right-handed and left-handed threads. ing. A protrusion 16 is provided on the screw member 12 between the nuts 13 and 14.
A contact member 15 is provided. The screw member 12 is connected at its square end to a drive shaft 17 passing through the hub 9 and the hollow drive shaft 10. A further abutment member 18 having a projection 19 is secured to the end member of the screw member 12 (FIG. 2). Natsu 1
A protrusion 20 is provided on the end face of 3, and the protrusion 20 is adapted to interact with the protrusion 16 of the abutment member 15 and the protrusion 19 of the abutment member 18.

Parts 5 and 6 of the device for moving the drum sector 1
(Fig. 1) shows an annular sliding member 21 and a lever 22, respectively.
Both ends of the lever 22 are articulated to the fan-shaped portion 1 of the drum and the sliding member 21.

Elements 7 and 8 of the device for moving the sector 3 of the drum
each consists of an annular sliding member 23 and a lever 24, both ends of which are articulated to the sector 3 of the drum and the sliding member 23.

Part 6 of the device for moving the sectors 1 and 3 of the drum
The sliding members 21 and 23 of members 5 and 7, which are numbered the same as the sliding members 8 and 8, are coaxially disposed on the drum hub 9 and move together and separately. The sliding members 21 and 23 of members 5 and 7 and the same numbered sliding members of members 6 and 8 move in opposite directions.

In order to carry out the above-mentioned movement, the sliding member 23 has a cylindrical shape having a projection 25 to which a lever 24 is articulated;
As shown in the figure, it is provided directly on the hub 9.

The slide member 21 is retained by a projection 26 (FIG. 2) provided on said slide member 23 and which fits within a longitudinal groove 27 provided in the slide member 23, thus preventing the slide member from sliding. The member 21 can be moved axially on the sliding member 23.

The sliding member 23 of the member 7 is secured to the nut 14 via an intermediate element 28, such as a key, which fits through the longitudinal groove 11 of the hub 9, for example. The sliding member 23 of the member 8 is secured to the nut 13 via a similar intermediate element 28. Therefore, when the screw member 12 is rotated, it can be moved in opposite directions. In order to move the sliding members 21 and 23 together,
The sliding member 21 is provided with a collar 29 with an adjusting screw 30, and the sliding member 23 is provided with a collar 31 which can be formed in the form of a nut. The end of the sliding member 21 interacts with the collar-shaped projection 31, and the adjusting screw 30 provided on the projection 29
It interacts with the protrusion 25 of No. 3.

The members of each device are connected by geared sectors mounted on levers 22 and 24 to move the sectors of the drum. The levers 22 of the members 5 and 6 of the device for moving the drum sector 1 are provided with toothed sector wheels 32 that are permanently in mesh with each other. The levers 24 of the members 7 and 8 of the device for moving the drum sector 3 are provided with toothed sector wheels 33 that are permanently in mesh with each other. An idler gear 3 is located between the toothed sector wheels 32 that join the members 5 and 6.
4 are provided. A toothed sector wheel 33, which joins parts 7 and 8 of the device for moving the sector 3 of the drum with movable shoulders 4, is provided with a device 35 for moving and resting said shoulder 4. The device 35 is connected to the shoulder 4 and the toothed sector wheel 33 .

Each device 35 (FIGS. 3 and 4) is composed of an arcuate groove 36 provided in the sector 3 of the drum, a link 37 and an intermediate link 38, for example a link 37 and a toothed sector wheel 33. The pin 39 is formed of a plate articulately connected to the arcuate groove 36 and is provided with a pin 39 arranged to engage the arcuate groove 36 . The link 37 is adjustable in length, i.e. is a telescoping structure, and is articulated to the shoulder 4 of the sector 3 of the drum.

The device 35 for moving and resting the shoulder 4 is the fifth
Other embodiments of the invention can be constructed as shown in the figures.

In FIG. 5, each device 35 is constructed in the form of a link 40 and a toothed rack 41 which are articulated to each other. The link 40 can be adjusted in length like a telescoping structure and can be attached to the shoulder 4 of the sector 3 of the drum.
is indirectly connected to. The toothed rack 41 is provided with an arc-shaped recess 42, and the toothed sector wheel 33 has a protrusion 43 that coincides with the arc-shaped recess 42 of the toothed rack 41.
are always engaged.

The device 35 can be constructed so that the shoulder portion is secured to the rack 41 (FIG. 1).

In order to carry out the invention most effectively, the arcuate recesses 42 of the toothed racks 41 and the corresponding protrusions 43 of the toothed sectors 33 are arranged so that the respective toothed sectors 33
different distances measured along the axis of the drum from the center of
₁ and ₂ .

Adjacent drum sectors 1 and 3 (FIG. 6) are connected internally by pivoted links 44 and 45. In order to connect the two links and allow them to rotate relative to each other, the link 44 is provided with a groove 46, into which a pin 47 provided on the link 45 is fitted.

In order to provide rigidity when the drum is expanded,
Drum sector 3 with movably provided shoulders
(FIG. 7), an abutment member 48 is provided which is adapted to contact the sector 1 of the adjacent drum when the drum is in the expanded state. Further, an inclined guide member 49 is provided on the fan-shaped portion 1 of the drum, and an abutment member 48 is disposed between the guide members 49. On the other hand, the sector 1 (FIG. 1) of the drum is provided with an adjustable abutment 50 which is adapted to contact the lever 22 when the drum is in the expanded state.

In order for the drum to function properly, it must be equipped with a braking device known in the art.

The drum operates as follows.

The hub 9 (FIG. 2) is pawled after the tire frame has been assembled on the drum by methods known in the art. Shaft 1 rotating together with screw member 12
7 moves the nuts 13 and 14 in opposite directions to separate them from the abutment member 15. nuts 13 and 1
4 moves the sliding member 23 cooperating with members 7 and 8 in the same direction as the nut, rotating the lever 24 and thus moving the sector 3 of the drum radially towards the hub 9. The sliding member 23 moves on the hub 9, while the sliding member 21 remains stationary relative to the sliding member 23.

As the lever 24 moves, the toothed sector wheel 33
rotates to move the link 37 as shown in FIG. Alternatively, an alternative embodiment (FIG. 5) interacts with the toothed rack 41, which rotates the movably mounted shoulder 4 inward. When the toothed rack 41 and the toothed sector wheel 33 are disengaged, the arcuate protrusion 43 provided on the toothed sector wheel 41 engages the toothed rack 41.
into the arcuate recess 42. In this way, the toothed rack 41 and thus the shoulder 4 rest during the further stroke of retracting the drum.

When the toothed shoulder 4 moves inward, the sliding member 21 of FIG. . Movement of the sliding member 21 rotates the lever 22 and thus moves the drum sector 1 radially towards the drum hub. During this time, the sliding members 21 and 23 move in unison until the drum has finished deflating, so that the sectors 1 and 3 of the drum move radially inward and in unison.

When the drum is in the contracted state as shown in FIG. 9, the fan-shaped portions 1 and 3 of the drum are in contact with the projections 20 provided on the surface of the nut 13 by the planar projections 19 of the abutting member 18 (FIG. 2). locked in position. Apart from the locking action, this arrangement also allows the threaded member 12 to
Provides self-tightening of the upper nuts 13 and 14.

When the drum is in its deflated state, the diameter of the drum is smaller than the diameter of the bead to which the tire frame is attached so that the tire frame can be easily removed from the drum.

The drum can be expanded in the opposite manner to contraction. In the expanded state of the drum, the sector 1 of the drum
and 3 are locked in position by abutment member 48 (FIG. 7), adjustable abutment member 50 (FIG. 1), and abutment member 15. In this case, the planar projection 16 of the abutment element 15 comes into contact with a projection 20 provided on the end face of the nut 13, thus preventing the screw pair from self-tightening during the expansion stroke of the drum.

In order to obtain the necessary drum diameter compensation for the work, the stroke of the sliding member 21 on the sliding member 23 is adjusted by adjusting the adjusting screw 30 and changing the position of the protrusion 31. is adjusted by replacing the abutting member 18 and fixing it in that position with a screw.

This structural arrangement makes it possible to provide the necessary position of the drum sectors 1 and 3 during expansion and contraction of the drum, as well as compensation for wear and manufacturing defects of the movable connections. During the expansion stroke of the drum, the abutment members 48 (FIG. 7) of the sector 3 of the drum come to be located between the inclined guide members 49 (FIG. 8). When the drum is expanded, the sector 1 (FIG. 7) of the drum is supported by the abutment members 48 and forms a strong structure, thus resulting in a high-performance production of the tire frame.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of a tire manufacturing drum constructed according to the present invention, Fig. 2 is a longitudinal sectional view of the drum hub and screw member drive device, and Fig. 3 is a device for moving and stopping the drum shoulder. FIG. 4 is a cutaway vertical cross-sectional view of the drum in a contracted state;
FIG. 5 is a diagram showing another embodiment of the device for moving and resting the drum shoulder; FIG. 6 is a cutaway side view of the drum in the expanded state; and FIG. 7 is the position of the sector of the drum when the drum is expanded. FIG. 8 is a view similar to FIG. 7 shown through the abutment member, and FIG. 9 is a cutaway side view of the drum in the expanded state. 1, 3... Sectoral part of the drum, 2... Fixedly provided shoulder, 4... Movably provided shoulder, 5, 6, 7, 8
... Member, 9... Drum hub, 11... Longitudinal groove,
12...Screw member, 13, 14...Nut, 15...Abutment member, 16...Protrusion, 21, 23...Sliding member, 2
2, 24...Lever, 28...Intermediate element, 29...Brim-like projection, 30...Adjusting screw, 32, 33...Toothed sector wheel, 34...Idle gear, 35...Movement/pause device, 36...Circular arc shape Groove, 37...Link, 38...Intermediate link, 39...Pin, 40...Link, 41...Toothed rack, 42...Recess, 43...Protrusion, 44, 45
... Link, 48... Hitting member, 49... Guide member.

Claims (1)

[Scope of Claims] 1. A tire manufacturing drum comprising a drum sector having a fixedly provided shoulder and a drum sector having a movable shoulder, the drum sector comprising: for displacing said sector, each of said devices having an identical device for moving said sectors, each of said devices including an annular slide connected to a screw drive and mounted on said drum hub and movable in the longitudinal direction of said drum. In a device having a toothed sector wheel arranged in constant meshing with a moving member, and a lever articulated to the sector of the drum and the sliding member, two members 5 are arranged symmetrically. , 6 and 7, 8 and sliding members 21 or 23 respectively cooperating with the members 5, 6 and 7, 8 of the device for moving the sectors 1, 3 of the drum in the radial direction. A toothed sector wheel 33 provided on the lever 24 of the members 7, 8 is provided on the drum hub 9 so as to move coaxially with the hub and separately in mutually or radially opposite directions. connected to a movably provided shoulder 4 by means of a device for moving and resting the shoulder;
Also, a tire manufacturing drum in which adjacent drum sectors 1 and 3 are interconnected on the inside by pivoted links 44, 45. 2 A contact member 15,1 having protrusions 16,19
8 are provided on the screw member 12 and arranged on both sides of the nut 13 having the projections 20, and the projections 16,
19. A drum according to claim 1, characterized in that 19 interacts with one of the projections 20 of the nut 13. 3 The sliding member 23 cooperating with the members 7, 8 of the device for moving the sector 3 of the drum is connected to the collar-shaped projection 25.
and a freely adjustable collar 31, which is formed into a nut shape and is configured to interact correspondingly with the adjusting screw 30 provided on the collar-like protrusion 29 of the sliding member 21 and the end of the sliding member 21. 2. A drum according to claim 1, which is formed by: 4. A sliding member 21 cooperating with the members 5, 6 of the device for moving the drum sector 1 with a fixedly mounted shoulder 2 and a drum sector 3 with a movably mounted shoulder 4. 4. A drum according to claim 1, wherein the drum is arranged to move axially on a sliding member (23) cooperating with the members (7, 8) of the moving device. 5 Respective devices 3 for moving and resting the shoulder 4
5 is an arc-shaped groove 36 provided in the fan-shaped portion 3 of the drum.
and a link 37 whose length is adjustable and which is articulated to the shoulder portion 4, and which is articulately connected between the link 37 and the toothed sector wheel 33 and arranged to fit into the arcuate groove 36. intermediate link 38 with pin 39
The drum according to claim 1, which is configured in the shape of. 6 Respective devices 3 for moving and resting the shoulder 4
5 is constructed in the shape of a link 40 and a toothed rack 41 that are connected to each other, the length of the link 40 is adjustable, and the toothed rack 41 is provided with an arcuate recess 42. Toothed sector wheel 3 with projections 43 that fit into arcuate recesses 42 in toothed racks 41
3. The drum according to claim 1, which meshes with the drum. 7. The arc-shaped recesses 42 in the toothed rack 41 and the corresponding protrusions 43 of the toothed sector wheels are located at different distances ₁ , ₂ from the center of the respective toothed sector wheel 33, measured along the axis of the drum. A drum according to claim 6 arranged therein. 8 The drum sector 3 with movably provided shoulders is connected to the adjacent drum sector 1 during drum expansion.
A drum-shaped sector 1 with a fixedly provided shoulder is provided with an abutment member 48 adapted to be in contact with the slanted guide member 49, between which the sector is supported. 8. The drum according to any one of claims 1 to 7, wherein a contact member 48 is provided to prevent the drums from being replaced in the axial direction. 9. Drum according to any one of claims 1 to 8, characterized in that an idler gear (34) is provided between the toothed sectors (32) of the sector (1) of the drum with a fixed shoulder.