CN217021493U - Tire building drum and tire building machine - Google Patents
Tire building drum and tire building machine Download PDFInfo
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- CN217021493U CN217021493U CN202220424702.2U CN202220424702U CN217021493U CN 217021493 U CN217021493 U CN 217021493U CN 202220424702 U CN202220424702 U CN 202220424702U CN 217021493 U CN217021493 U CN 217021493U
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Abstract
The utility model relates to the technical field of tire forming, and discloses a tire forming drum and a tire forming machine. The tire building drum comprises a drum shaft, a middle drum and two side drums, wherein the middle drum and the two side drums are arranged outside the drum shaft; every side drum all includes the axle sleeve of being connected with the half drum that corresponds, set up in the side drum main part outside the axle sleeve and turn over the pole subassembly and connect in the side drum main part and the coupling assembling that the pole subassembly was turned over in the axial penetration, coupling assembling includes two at least connecting rods that set up along side drum main part circumference, the one end and the side drum main part fixed connection of connecting rod, the other end and turn over the pole subassembly interference fit. On the basis of realizing the turn-up molding action, the turn-up molding action can be realized, the requirements of the molding processes of different types of tires are met, the tires of different types can be molded by the tire molding drum, and the requirements of customers are met.
Description
Technical Field
The utility model relates to the technical field of tire forming, in particular to a tire forming drum and a tire forming machine.
Background
As shown in fig. 1 and fig. 2, in the tire building process, the one-step mechanical building drum realizes the integral axial movement of the side drum 3 ' and the half drum 21 ' through the synchronous axial movement of the flat-wide pin 35 ' and the turn-up pin 312 ', and realizes the rise and fall of the turn-up rod assembly on the building drum through the independent axial movement of the turn-up pin 312 ', so as to realize the turn-up forming action in the tire building process.
However, the conventional forming drum can only realize the whole axial movement of the side drum 3 'and the half drum 21', and cannot realize the axial separation and combination of the side drum 3 'and the half drum 21'. Therefore, the existing forming drum can only realize the reverse-wrapping forming action and can not realize the forward-wrapping forming action, so that the requirements of different types of tire forming processes can not be met.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, an object of the present invention is to provide a tire building drum and a tire building machine, which can realize both the turn-up and turn-up operations in the tire building process, so as to meet the requirements of different types of tire building processes.
In order to realize the purpose, the following technical scheme is provided:
in a first aspect, the present invention provides a tyre building drum comprising a drum shaft and, disposed outside said drum shaft, a central drum and two side drums, said central drum comprising two axially movable half-drums, each half-drum being connected to an adjacent side drum;
each side drum comprises a shaft sleeve connected with the corresponding half drum, a side drum main body and a turn-up rod assembly arranged outside the shaft sleeve, and a connecting assembly connected with the side drum main body and axially penetrating through the turn-up rod assembly, the connecting assembly comprises at least two connecting rods arranged along the circumferential direction of the side drum main body, one end of each connecting rod is fixedly connected with the side drum main body, and the other end of each connecting rod is in interference fit with the turn-up rod assembly;
when the anti-coating rod assembly axially moves along the anti-coating falling direction, the side drum main body can be driven to be separated from the half drum through the connecting assembly;
when the turn-up rod assembly moves axially along the turn-up direction, the side drum main body can be attached to the half drum under the driving action of an external air source.
As an alternative of the tire building drum provided by the utility model, the turn-up rod assembly comprises a support member, a rod body of the connecting rod movably penetrates through the support member, one end of the connecting rod is connected with the side drum main body, and the other end of the connecting rod is provided with a limiting plug which can be attached to the support member.
As an alternative to the tyre building drum provided by the present invention, the turn-up rod assembly further comprises a turn-up rod rotatably arranged on the support, the turn-up rod having a horizontal state and a raised state.
As an alternative to the tire building drum provided by the present invention, the turn-up rod assemblies further include turn-up pins connected to the support, and the turn-up pins of the two turn-up rod assemblies can be driven by a second driving device to move axially toward or away from each other, so as to realize turn-up building action and separation between the side drum main body and the half drum.
As an alternative to the tire building drum provided by the present invention, the side drum main body comprises a cylinder assembly and a bead locking assembly, the cylinder assembly can drive the side drum main body to move on the shaft sleeve under the driving of the external air source, and the cylinder assembly is also used for driving the bead locking assembly to radially lock a bead.
As an alternative to the tire building drum provided by the present invention, the cylinder assembly includes a partition, a first cylinder and a second cylinder, the first cylinder and the second cylinder are axially and fixedly connected and are respectively slidably connected with the shaft sleeve, the first cylinder is connected with one end of the connecting rod, the second cylinder accommodates the bead locking assembly, the partition is fixedly disposed on the shaft sleeve and is located in an air chamber formed by the first cylinder, the shaft sleeve and the second cylinder, the partition divides the air chamber into a first air chamber and a second air chamber, and the first cylinder and the second cylinder can synchronously and axially move under the pressure difference of the first air chamber and the second air chamber, so that the side drum main body is returned to be attached to the half drum under the driving action of the external air source.
As an alternative to the tire building drum provided by the present invention, the external air source comprises a first air compressor for evacuating or evacuating the first air chamber and a second air compressor for evacuating or inflating the second air chamber.
As an alternative of the tire building drum provided by the present invention, the bead locking assembly includes a first wedge block and a second wedge block, the first wedge block is disposed around the drum shaft, a sealed air cavity is formed between the first wedge block and the second cylinder, the first wedge block can be driven to move axially by inflating or vacuuming the sealed air cavity, the second wedge block is disposed several blocks circumferentially around the drum shaft, and the first wedge block and each of the second wedge blocks are matched through an inclined surface, so that the first wedge block drives the second wedge blocks to move radially when moving axially.
As an alternative of the tire building drum provided by the present invention, each of the side drums further comprises a flat-wide bolt and a flat-wide nut seat which are detachably connected, one end of the shaft sleeve is connected with the flat-wide bolt, the other end of the shaft sleeve is connected with the half drum, a rotatable second lead screw is arranged in the drum shaft, and the flat-wide nut seat is in threaded connection with the second lead screw.
In a second aspect, the utility model also provides a tyre building machine comprising a tyre building drum as described above.
The utility model has the beneficial effects that:
according to the tire forming drum and the tire forming machine provided by the utility model, when the turn-up rod assembly axially moves along the turn-up falling direction, the side drum main body can be driven to be separated from the half drum through the connecting assembly, so that a space can be formed between the side drum main body and the half drum, and the space can meet the forward-wrapping forming action of a tire body material in the tire forming process, namely, one side of the tire side material attached to two sides of the tire body material exceeds the edge of the middle drum is wrapped and rolled and attached; when the turn-up rod assembly axially moves along the turn-up direction, the side drum main body can be driven by an external air source to axially approach the corresponding half drum, the space for the turn-up process is gradually reduced until the side drum main body is attached to the corresponding half drum, and the turn-up forming action in the tire forming process is conveniently realized subsequently; therefore, the tire building drum and the tire building machine provided by the utility model can realize the forward-wrapping forming action on the basis of realizing the reverse-wrapping forming action, meet the requirements of different types of tire building processes, enable the tire building drum to build different types of tires and meet the requirements of customers.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings may be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic view of a prior art tire building drum;
FIG. 2 is a schematic view of a prior art tire building drum in the start of turn-up;
FIG. 3 is a schematic structural view of a tire building drum provided by the present invention;
FIG. 4 is a schematic structural view of a tire building drum provided by the present invention in a turn-up building operation;
FIG. 5 is a schematic structural view of a tire building drum provided by the present invention with the side drum and half drum separated;
FIG. 6 is a perspective view of a tire building drum provided by the present invention;
FIG. 7 is a perspective view of a tire building drum provided by the present invention with the side drum and half drum separated.
In the figure:
35' -flat wide bolt; 313' -turn up pins; 3' -side drum; 21' -half drum;
1-drum shaft; 2-medium drum; 3-side drum;
21-half drum;
31-a turn-up bar assembly; 32-a bead lock assembly; 33-a connecting assembly; 34-a cylinder assembly; 35-flat wide plug
A pin; 36-shaft sleeve;
311-a support; 312-anti-wrap latch; 313-turnup rods;
321-a first wedge; 322-a second wedge;
331-connecting rod; 332-limiting plug;
341-a separator; 342-a first air cavity; 343-a second air cavity; 344-a first cylinder; 345-a second cylinder; 346-closed air cavity.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 3 to 7, the present invention provides a tire building drum including a drum shaft 1, and a middle drum 2 and two side drums 3 provided outside the drum shaft 1. Wherein, two side drums 3 are respectively positioned at two axial sides of the middle drum 2 and are symmetrically arranged. In particular, the middle drum 2 comprises two half-drums 21 axially movable towards and away from each other, each half-drum 21 being fixedly connected to a portion of the adjacent side drum 3.
As shown in fig. 3 to 5, each lateral drum 3 comprises a bushing 36 fixedly connected with the corresponding half drum 21, a lateral drum main body and turn-up rod assembly 31 arranged outside the bushing 36, and a connecting assembly 33 connected to the lateral drum main body and axially passing through the turn-up rod assembly 31. One end of the sleeve 36 is connected to the half drum 21 and the other end is connected to a first driving device for driving the sleeve 36 to move axially. The turn-up rod assembly 31 is arranged on the periphery of the shaft sleeve 36 and can move axially along the outer surface of the shaft sleeve 36, and the turn-up rod assembly 31 is connected with a second driving device which can drive the turn-up rod assembly 31 to move axially. The sleeve 36 is a part of the side drum 3 fixedly connected to the half drum 21.
Further, the turn-up lever assembly 31 has an initial horizontal state (as shown in fig. 3) and a raised state (as shown in fig. 4) when turned up. Wherein, as shown in fig. 3, turn-up rod assembly 31 is flush with the circumferential outer surface of the tire building drum in a horizontal state, such that the outer surface of turn-up rod assembly 31 is available to receive a portion of the carcass material. As shown in fig. 4, the turn-up rod assembly 31 can turn up the carcass material in a lifted state to meet the requirement of the tire building process.
As shown in fig. 3 to 5, the connecting assembly 33 includes at least two connecting rods 331 arranged along the circumferential direction of the side drum main body. Wherein, one end of the connecting rod 331 is fixedly connected with the side drum main body, and the other end can be in interference fit with the turn-up rod assembly 31. When the turn-up rod assembly 31 moves axially inwards to turn up, the connecting rod 331 does not obstruct or limit the axial inwards movement of the turn-up rod assembly 31, and the turn-up rod assembly 31 can smoothly complete turn-up of the tire body material. After the turn-up rod assembly 31 completes the turn-up action, the turn-up rod assembly 31 returns to the original position.
Due to the requirement of the tire forming process, the side drum main body needs to move outwards along the axial direction, so that a space is formed between the side drum main body and the half drum 21, and the space can meet the positive wrapping forming action of the tire body material in the tire forming process, namely, one side of the tire side material attached to the two sides of the tire body material exceeds the edge of the middle drum 2 is wrapped, rolled and attached. On the basis of the action of the reverse wrapping forming, the action of the forward wrapping forming can be realized, and the requirements of the tire forming processes of different types are met, so that the tire forming drum can form tires of different types, and the requirements of customers are met.
Specifically, the turn-up lever assembly 31 comprises a support 311, the shaft of the connecting rod 331 movably penetrates through the support 311, one end of the connecting rod 331 is connected with the side drum main body, and the other end of the connecting rod 331 is provided with a limiting plug 332 capable of being attached to the support 311, so as to realize axial interference fit with the turn-up lever assembly 31. As shown in fig. 4, when the turn-up lever assembly 31 is axially moved in the turn-up direction, the connecting bar 331 serves as a guide since the shaft of the connecting bar 331 is movably inserted through the support 311. As shown in fig. 5, when the turn-up rod assembly 31 axially moves along the turn-up falling direction, the limiting plug 332 on the connecting rod 331 is attached to the supporting member 311 to generate an interaction force, so that the turn-up rod assembly 31 drives the side drum main body to be separated from the half drum 21 through the connecting rod 331 (as shown in fig. 7), at this time, a space is formed between the side drum main body and the half drum 21, and the space can meet the requirement of the forward-wrapping molding action of the carcass material in the tire molding process, that is, the side material attached to both sides of the carcass material exceeds the edge of the middle drum 2 to be wrapped in a rolling manner.
Specifically, the turn-up lever assembly 31 further comprises a turn-up lever 313, the turn-up lever 313 is rotatably disposed on the supporting member 311, and the turn-up lever 313 has a horizontal state and a raised state. As shown in fig. 3, the turnup rods 313 are in a horizontal position flush with the circumferential outer surface of the tyre building drum, so that the outer surface of the turnup rods 313 can be used to receive a portion of the carcass material. As shown in fig. 4, the turn-up rod 313 can turn up the carcass material in a raised state to meet the requirements of the tire building process.
Further, the turn-up rod assembly 31 further comprises a turn-up latch 312 fixedly connected with the support 311. The second driving device can drive the turning-up pins 312 of the two turning-up rod assemblies 31 to axially move towards or away from each other so as to realize the turning-up forming action and the separation between the side drum main body and the half drum 21. The second driving means includes a second transmission mechanism connected to the turnup latch 312 and a second driving source driving the second transmission mechanism. Preferably, the second transmission mechanism is a screw nut pair mechanism or a push-pull rod mechanism and is arranged in the drum shaft 1, and the second driving source is a servo motor. Specifically, the lateral drum body includes a cylinder assembly 34 and a bead lock assembly 32 located axially inward of the cylinder assembly 34. Wherein the side drum body is movable on the sleeve 36 under the drive of an external air source. In addition, cylinder assembly 34 may actuate bead lock assembly 32 to radially lock the bead. Located axially inward of the side drum body, opposite the respective drum halves 21, are bead lock assemblies 32, which bead lock assemblies 32 serve to lock the beads, completing the bead-up step of the tire building process.
Further, the cylinder assembly 34 includes a partition 341, a first cylinder 344, and a second cylinder 345. Wherein the first cylinder 344 and the second cylinder 345 are axially fixed and connected such that the first cylinder 344 and the second cylinder 345 can slide together on the shaft sleeve 36. The first cylinder 344 is fixedly connected to one end of the connecting rod 331, and the second cylinder 345 houses the bead lock assembly 32. The divider 341 is fixedly disposed on the shaft sleeve 36 and located in an air chamber formed by the first cylinder 344, the shaft sleeve 36 and the second cylinder 345, the divider 341 divides the air chamber into a first air chamber 342 and a second air chamber 343, and the first cylinder 344 and the second cylinder 345 can synchronously and axially move under the pressure difference of the first air chamber 342 and the second air chamber 343, so that the side drum main body is returned to be close to the half drum 21 under the driving action of an external air source.
As shown in fig. 5, when the second driving device drives the turn-up rod assembly 31 to move axially outward, and after the turn-up rod assembly 31 axially interferes with the limiting plug 332 of the connecting rod 331 of the connecting assembly 33 fixedly connected to the side drum main body, the turn-up rod assembly 31 continues to move axially outward and drives the side drum main body to move axially outward, so that a space for the forward wrapping process is formed between the side drum main body and the half drum 21. When the turn-up rod assembly 31 axially moves in the turn-up direction (i.e., axially inward direction) after the turn-up process of building the tire blank is completed, the first air chamber 342 is vacuumized, the second air chamber 343 is inflated, and under the action of the pressure difference between the first air chamber 342 and the second air chamber 343, the first cylinder 344 and the second cylinder 345 can slide relative to the partition 341, so that the first cylinder 344 and the second cylinder 345 synchronously drive the bead locking assembly 32 to achieve that the side drum main body axially approaches the corresponding half drum 21, and the space for the turn-up process gradually decreases until the side drum main body abuts against the corresponding half drum 21 (as shown in fig. 6) so as to perform the subsequent tire building process.
To facilitate control of the pressure difference between the first air chamber 342 and the second air chamber 343, optionally, the external air source includes a first air compressor for inflating or evacuating the first air chamber 342 and a second air compressor for evacuating or inflating the second air chamber 343.
Specifically, bead lock assembly 32 includes first wedge block 321 and second wedge block 322, first wedge block 321 encircles drum shaft 1 and sets up, forms airtight air chamber 346 between first wedge block 321 and the second cylinder 345, inflate or the evacuation can drive first wedge block 321 axial displacement in airtight air chamber 346, second wedge block 322 is provided with a plurality ofly along circumference around drum shaft 1, first wedge block 321 and every second wedge block 322 are all through the cooperation of inclined plane to drive a plurality of second wedge block 322 radial displacement when making first wedge block 321 axial displacement.
The first wedge block 321 has a first inclined surface, each second wedge block 322 has a second inclined surface, and the first wedge block 321 moves axially to make the first inclined surface abut against the second inclined surfaces of the plurality of second wedge blocks 322, so as to drive the plurality of second wedge blocks 322 to move radially and synchronously, so that the plurality of second wedge blocks 322 can contract or expand radially and synchronously.
Further, the bead locking assembly 32 further comprises a capsule and a return spring, wherein the capsule and the return spring are both arranged on the radial outer side of the plurality of second wedge-shaped blocks 322, the radially expanded second wedge-shaped blocks 322 can drive the capsule to elastically deform in the radial direction so as to enable the capsule to be matched with the inner circumferential surface of the bead material, and the return spring is used for returning the radially expanded second wedge-shaped blocks 322. When the plurality of second wedge-shaped blocks 322 are contracted radially, the return spring can provide a radial contraction force for the plurality of second wedge-shaped blocks 322, and after the plurality of second wedge-shaped blocks 322 are contracted radially, the outer circumferential surfaces of the capsules are kept flush with the outer circumferential surfaces of the middle drum 2 and the side drum 3.
As shown in fig. 4, after the plurality of second wedges 322 are radially expanded, the bladder may engage the inner circumferential surface of the bead material to lock the bead material and complete the bead up step of the tire process. The first wedge-shaped block 321 can be pushed to move axially by inflating the air-tight air cavity 346, so as to drive the plurality of second wedge-shaped blocks 322 to move radially outwards. By pulling a vacuum in the enclosed air cavity 346, the second plurality of wedge blocks 322 are driven by the return spring to move radially inward and return to their original positions.
Further, each side drum 3 further includes a flat-wide pin 35, and one end of the flat-wide pin 35 is connected to the boss 36 and the other end is connected to the half drum 21. The first drive means can drive the flat-width pins 35 axially towards or away from each other to achieve flat-width of the tyre building drum. The first driving means includes a first transmission mechanism connected to the flat-wide plug 35 and a first driving source driving the first transmission mechanism. Preferably, the first transmission mechanism is a push-pull rod mechanism of a screw-nut pair mechanism and is arranged in the drum shaft 1, and the first driving source is a servo motor.
The embodiment also provides a tire building machine, including foretell tire building drum, on can realizing the basis of the shaping action of turning over the package, can also realize just wrapping the shaping action, satisfied the demand of different grade type tire shaping technology for the tire building drum can the tire of shaping different grade type, has satisfied customer's demand.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements and substitutions will now be apparent to those skilled in the art without departing from the scope of the utility model. Therefore, although the present invention has been described in some detail by the above embodiments, the utility model is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the utility model, and the scope of the utility model is determined by the scope of the appended claims.
Claims (10)
1. A tyre building drum, includes the drum axle and set up in well drum and two side drums outside the drum axle, well drum is including two half drums that can axially move, every half drum is with adjacent the side drum is connected its characterized in that:
each side drum comprises a shaft sleeve connected with the corresponding half drum, a side drum main body and a turn-up rod assembly arranged outside the shaft sleeve, and a connecting assembly connected with the side drum main body and axially penetrating through the turn-up rod assembly, the connecting assembly comprises at least two connecting rods arranged along the circumferential direction of the side drum main body, one end of each connecting rod is fixedly connected with the side drum main body, and the other end of each connecting rod can be in interference fit with the turn-up rod assembly;
when the anti-coating rod assembly axially moves along the anti-coating falling direction, the side drum main body can be driven to be separated from the half drum through the connecting assembly;
when the turn-up rod assembly moves axially along the turn-up direction, the side drum main body can be abutted against the half drum under the driving action of an external air source.
2. The tire building drum of claim 1, wherein the turn-up bar assembly comprises a support member, a shaft of the connecting rod movably penetrates through the support member, one end of the connecting rod is connected with the side drum body, and the other end of the connecting rod is provided with a limiting choke plug which can be attached to the support member.
3. Tire building drum according to claim 2, wherein the turn-up bar assembly further comprises a turn-up bar rotatably arranged on the support, the turn-up bar having a horizontal state and a raised state.
4. Tyre building drum according to claim 2, wherein the turn-up rod assemblies further comprise turn-up pins connected with the support, the turn-up pins of the two turn-up rod assemblies being axially movable towards and away from each other under the drive of a second drive device for effecting a turn-up forming action and a separation between the side drum body and the half drum.
5. Tire building drum according to any one of claims 1-4, wherein the side drum body comprises a cylinder assembly and a bead lock assembly, the cylinder assembly being capable of moving the side drum body over the hub upon actuation of the external air source, the cylinder assembly further being adapted to actuate the bead lock assembly to radially lock the beads.
6. Tire building drum according to claim 5, wherein the cylinder assembly comprises a partition, a first cylinder and a second cylinder, the first cylinder body and the second cylinder body are axially and fixedly connected and are respectively connected with the shaft sleeve in a sliding way, the first cylinder is connected with one end of the connecting rod, the second cylinder accommodates the tire bead locking assembly, the separator is fixedly arranged on the shaft sleeve, and is positioned in an air cavity formed by the first cylinder body, the shaft sleeve and the second cylinder body in an enclosing way, the separator divides the air cavity into a first air cavity and a second air cavity, the first cylinder body and the second cylinder body can synchronously and axially move under the action of the pressure difference of the first air cavity and the second air cavity, so that the side drum main body is reset to be attached to the half drum under the driving action of the external air source.
7. Tire building drum according to claim 6, wherein the external air source comprises a first air compressor for inflating or evacuating the first air chamber and a second air compressor for evacuating or inflating the second air chamber.
8. Tire building drum according to claim 6, wherein the bead lock assembly comprises a first wedge and a second wedge, the first wedge being arranged around the drum shaft, a closed air chamber being formed between the first wedge and the second cylinder, inflation or evacuation of air into the closed air chamber being able to drive the first wedge to move axially, the second wedge being arranged in a number circumferentially around the drum shaft, the first wedge and each of the second wedges being in inclined engagement such that axial movement of the first wedge causes a number of radial movement of the second wedges.
9. Tyre building drum according to claim 1, in which each side drum further comprises a flat-wide pin and a flat-wide nut seat detachably connected, one end of the sleeve being connected to the flat-wide pin and the other end being connected to the half drum, a second rotatable screw being arranged in the drum shaft, the flat-wide nut seat being in threaded connection with the second screw.
10. A tyre building machine comprising a tyre building drum according to any one of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220424702.2U CN217021493U (en) | 2022-03-01 | 2022-03-01 | Tire building drum and tire building machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220424702.2U CN217021493U (en) | 2022-03-01 | 2022-03-01 | Tire building drum and tire building machine |
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| CN217021493U true CN217021493U (en) | 2022-07-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116021819A (en) * | 2023-02-27 | 2023-04-28 | 中策橡胶集团股份有限公司 | Tyre building machine adopting mechanical drum |
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2022
- 2022-03-01 CN CN202220424702.2U patent/CN217021493U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116021819A (en) * | 2023-02-27 | 2023-04-28 | 中策橡胶集团股份有限公司 | Tyre building machine adopting mechanical drum |
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