WO2023160648A1

WO2023160648A1 - Tire building drum

Info

Publication number: WO2023160648A1
Application number: PCT/CN2023/078114
Authority: WO
Inventors: 吴从高
Original assignee: 萨驰智能装备股份有限公司
Priority date: 2022-02-24
Filing date: 2023-02-24
Publication date: 2023-08-31
Also published as: CN217021492U

Abstract

A tire building drum. A synchronous drive assembly in a case drives a first push-pull rod inside a drum shaft and a second push-pull rod outside the drum shaft to move synchronously; the first push-pull rod drives a first turn-up rod mechanism and the second push-pull rod drives a second turn-up rod mechanism, achieving synchronous expansion and contraction of the first turn-up rod mechanism and the second turn-up rod mechanism, thus realizing turn-up expansion and contraction, and the first push-pull rod and the second push-pull rod respectively have rod-shaped structures; the structure is simple, the manufacturing cost is low, the structural strength and rigidity are high, control is convenient, push-pull precision and stability are improved, the integration level of the synchronous drive assembly is high, the overall size of the case can be reduced, the second push-pull rod is located outside of the drum shaft, the complexity of the internal structure of the drum shaft is reduced, maintenance is convenient and the fault rate is low.

Description

tire building drum

This application claims the priority of a Chinese patent application with a filing date of February 24, 2022 and application number 202220381875.0, the entire contents of which are incorporated herein by reference.

technical field

The present application relates to the technical field of tire building, for example, to a tire building drum.

Background technique

In the related technology, the half-drum opening and closing action and turn-up lifting action of the tire building drum can adopt the following two driving methods:

The first driving method, such as a tire building drum used to construct unvulcanized tires, the tire building drum uses a main shaft and four pull rods inside the main shaft to realize the movement of the left half of the drum, the turn-up of the left half of the drum, and the movement of the right half of the drum And the right half of the drum turns up and down, and the displacement of the four tie rods is controlled inside the main chassis. However, this driving method has the following disadvantages: 1) the pull rod located on the outer layer is tubular, with thin wall and poor rigidity, difficult to maintain precision, poor stability, and high control accuracy requirements; 2) the manufacturing cost of the pull rod is relatively high; 3) the chassis Larger volume.

The second drive mode, for example: the tire building drum used for molding unvulcanized tires in the related art includes a main shaft and two mandrels located inside the main shaft, and the two mandrels are located on the radially outside of the support drum shaft, through which the mandrel The rotation respectively drives the axial movement of the bead core support body and the folding arm support body, respectively realizing the movement of the left half drum, the up-down of the left half-drum, the movement of the right half-drum and the up-down of the right half-drum. However, this driving method has the following disadvantages: 1) The machining of the chassis is difficult, the gear combination assembly has high precision, and the control is complicated; 2) The internal screw of the main shaft is not concentric with the main shaft, and the synchronization between the main shaft rotation and the screw and the angle matching calculation are complicated and easy. error.

Contents of the invention

The application provides a tire building drum with simple structure, convenient control, high integration, small overall volume, convenient maintenance and low failure rate.

An embodiment of the present application provides a tire building drum, comprising:

Chassis;

a drum shaft extending from the inside of the casing to the outside of the casing;

The first half-drum and the second half-drum are respectively sleeved outside the drum shaft and arranged oppositely, and the first half-drum A first turn-up rod mechanism is provided, and the second half-drum is provided with a second turn-up rod mechanism;

The transmission device includes a first push-pull rod group and a second push-pull rod group, the first push-pull rod group is arranged in the drum shaft, and the first push-pull rod group includes at least two push-pull rod groups respectively connected to the first turn-up The first push-pull rod connected to the rod mechanism, the second push-pull rod group is arranged outside the drum shaft, and the second push-pull rod group includes at least two second push-pull rods respectively connected with the second turn-up rod mechanism tie rods; and

A driving device is arranged in the case, the driving device includes a synchronous driving assembly, and the synchronous driving assembly is configured to drive the first push-pull rod and the second push-pull rod to move synchronously, so that the first reaction The wrapping rod mechanism and the second turn-up rod mechanism rise and fall synchronously.

Description of drawings

Fig. 1 is a schematic sectional view of a tire building drum provided by a specific embodiment of the present application;

Fig. 2 is a schematic cross-sectional view of a tire building drum provided in a specific embodiment of the present application when performing a turn-up action;

Fig. 3 is a schematic structural view of a tire building drum provided by a specific embodiment of the present application;

Fig. 4 is a schematic structural view of a synchronous drive assembly in a tire building drum provided by a specific embodiment of the present application;

Fig. 5 is a schematic cross-sectional view of a synchronous drive assembly in a tire building drum provided by a specific embodiment of the present application.

In the picture:

1-chassis; 2-drum shaft; 3-first half drum; 4-first turn-up rod mechanism; 5-first push-pull rod; 6-second half-drum; 7-second turn-up rod mechanism; 8- The second push-pull rod; 9-synchronous drive assembly; 10-half drum drive assembly; 11-drum shaft drive assembly;

41-the main body of the first turn-up rod mechanism; 42-the first push-pull plate;

71-the main body of the second turn-up rod mechanism; 72-the second push-pull plate;

91-synchronous driving part; 92-first ball screw pair; 93-second ball screw pair; 94-first synchronous wheel; 95-second synchronous wheel; 96-synchronous linkage; 97-connection sleeve; 98 -link;

921-the first nut; 922-the first leading screw;

931-the second nut; 932-the second leading screw;

971-ring; 972-ear;

101-half-drum driver; 102-the third lead screw; 103-the third nut; 104-the fourth nut.

Detailed ways

In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplification of the description, rather than indicating or implying that the referred device or element must have a specific orientation, use a specific orientation construction and operation, therefore should not be construed as limiting the application. In addition, the terms "first" and "second" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance. Wherein, the terms "first position" and "second position" are two different positions.

In the description of this application, it should be noted that unless otherwise specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application in specific situations.

As shown in Figures 1 to 5, the embodiment of the present application provides a tire building drum. The tire building drum includes a chassis 1 provided with a driving device, a drum shaft 2 extending outward from the inside of the chassis 1, and respectively sleeved The first half-drum 3 and the second half-drum 6 outside the drum shaft 2 and the transmission devices connected with the first half-drum 3 and the second half-drum 6 respectively. The specific structure of the tire building drum will be described in detail below.

As shown in FIG. 1 , the drum shaft 2 has a hollow structure, and the drum shaft 2 can rotate under the drive of the driving device in the cabinet 1 . The first half-drum 3 and the second half-drum 6 are sleeved outside the drum shaft 2 and are arranged oppositely. The driving device can also drive the first half-drum 3 and the second half-drum 6 to move toward or away from each other through a transmission device, so as to realize tire rotation. The switch between the flat width state and the inflated and shaped state of the building drum meets the needs of the tire building process.

As shown in FIG. 1 and FIG. 2 , the first half-drum 3 is provided with a first turn-up rod mechanism 4 , and the second half-drum 6 is provided with a second turn-up rod mechanism 7 . The first turn-up lever mechanism 4 may include a first turn-up lever mechanism main body 41 and a first push-pull plate 42 . Wherein, the first end of the first turn-up lever mechanism main body 41 is pivotally connected with the first push-pull plate 42 , and the second end of the first turn-up lever mechanism main body 41 is arranged on the outer surface of the first half-drum 3 . The second turn-up lever mechanism 7 includes a second turn-up lever mechanism main body 71 and a second push-pull plate 72 . Wherein, the first end of the second turn-up lever mechanism body 71 is pivotally connected to the second push-pull plate 72 , and the second end of the second turn-up lever mechanism body 71 is arranged on the outer surface of the second half-drum 6 .

The transmission device includes a first push-pull rod group and a second push-pull rod group connected with the driving device. Wherein, the first push-pull rod set is arranged inside the drum shaft 2 and extends into the cabinet 1 to connect with the driving device, and the second push-pull rod group is arranged outside the drum shaft 2 and extends into the cabinet 1 to connect with the drive device. The first push-pull rod set includes The second push-pull rod set includes at least two second push-pull rods 8 connected to the second push-pull disk 72 . The driving device can synchronously drive the first push-pull rod group and the second push-pull rod group to move toward or away from each other, thereby driving the first turn-up rod mechanism body 41 and the second turn-up rod mechanism body 71 to rise and fall toward each other or opposite to each other. It should be noted that the first push-pull rod 5 and the second push-pull rod 8 adopt a rod-shaped structure, which has a simple structure, low manufacturing cost, high structural strength and rigidity, convenient control, and improved push-pull accuracy and stability.

The driving device includes a synchronous drive assembly 9, which is arranged in the cabinet 1, and the synchronous drive assembly 9 is configured to drive the first push-pull rod 5 and the second push-pull rod 8 to move synchronously, so that the first turn-up rod mechanism 4 and the second push-pull rod mechanism The two turn-up rod mechanisms 7 move close to each other or move away from each other. The first push-pull rod 5 in the drum shaft 2 and the second push-pull rod 8 outside the drum shaft 2 are driven to move synchronously by the synchronous drive assembly 9 in the cabinet 1, the first push-pull rod 5 drives the first turn-up rod mechanism 4, the second The push-pull rod 8 drives the second turn-up rod mechanism 7 to realize the movement of the first turn-up rod mechanism 4 and the second turn-up rod mechanism 7 towards each other or away from each other, thereby realizing the turn-up movement. The synchronous driving assembly 9 has a high degree of integration, which can reduce the overall volume of the chassis 1. The second push-pull rod 8 is located outside the drum shaft 2, which reduces the complexity of the internal structure of the drum shaft 2. It is easy to maintain and has a low failure rate.

As shown in FIGS. 3 to 5 , the synchronous driving assembly 9 may include a synchronous driving member 91 , two sets of first ball screw sets 92 and two sets of second ball screw sets 93 . In one embodiment, the first nut 921 of the first ball screw pair 92 is connected to the first push-pull rod 5, the second nut 931 of the second ball screw pair 93 is connected to the second push-pull rod 8, and the synchronous driving member 91 Set to drive the first lead screw 922 of the first ball screw pair 92 and the second lead screw 932 of the second ball screw pair 93 to rotate synchronously, so that the first nut 921 and the second nut 931 face each other at the same speed or Move opposite to each other, and then drive the first push-pull rod 5 and the second push-pull rod 8 to move toward or opposite each other, so that the first turn-up rod mechanism 4 and the second turn-up rod mechanism 7 move closer or move away from each other synchronously. The first ball screw pair 92 and the second ball screw pair 93 use the ball motion, the starting torque is extremely small, there will be no crawling phenomenon of sliding motion, and accurate micro-feed motion can be realized, while the motion efficiency is high and the heat generation is small. The high-speed feed movement can be realized, the control is convenient, and the moving precision of the first turn-up rod mechanism 4 and the second turn-up rod mechanism 7 is improved.

The synchronous drive assembly 9 can also include a first synchronous wheel 94, a second synchronous wheel 95 and a synchronous linkage 96, and the synchronous drive 91 is configured to drive the first synchronous wheel 94 or the second synchronous wheel 95 to rotate, and the first synchronous wheel 94 passes through The synchronous linkage member 96 rotates synchronously with the second synchronous wheel 95 , the first synchronous wheel 94 is connected with the first lead screw 922 , and the second synchronous wheel 95 is connected with the second lead screw 932 . The first synchronous wheel 94 and the second synchronous wheel 95 adopt a wheel-shaped structure and are synchronously driven by the synchronous linkage 96 to facilitate the precise and consistent control of the first lead screw 922 and the second lead screw 932 .

In this embodiment, the synchronous linkage 96 is a synchronous belt, and the first synchronous wheel 94 and the second synchronous wheel 95 are divided Don't be a timing pulley. When the synchronous belt is driven, the transmission ratio is accurate, the force on the shaft is small, the structure is compact, the oil resistance is good, the wear resistance is good, and the anti-aging performance is good.

In another embodiment, the synchronous linkage member 96 may also be a chain, and the first synchronous wheel 94 and the second synchronous wheel 95 are respectively sprockets. Compared with belt drive, chain drive has the following advantages: no elastic sliding and slipping phenomenon, accurate average transmission ratio, reliable operation, high efficiency; large transmission power, strong overload capacity, small transmission size under the same working conditions; required tension The tightening force is small, and the pressure acting on the shaft is small; it can work in harsh environments such as high temperature, humidity, dust and pollution.

The synchronous drive assembly 9 may also include a connecting sleeve 97 and a connecting rod 98 , the first push-pull rod 5 is connected to the first nut 921 through the connecting sleeve 97 , and the second push-pull rod 8 is connected to the second nut 931 through the connecting rod 98 . There are two first push-pull rods 5 and two first ball screw pairs 92 respectively, and one connecting sleeve 97 is provided, and the connecting sleeve 97 is connected with two first push-pull rods 5 and two first nuts 921 at the same time. There are two second push-pull rods 8 , a second ball screw pair 93 and two connecting rods 98 , and each second push-pull rod 8 is connected to a second nut 931 through a connecting rod 98 .

As shown in Figure 4, the connecting sleeve 97 may include a connected ring part 971 and an ear part 972, the ring part 971 is coaxially arranged with the drum shaft 2, the ring part 971 is connected with the first push-pull rod 5, and the ear part 972 is connected with the first push-pull rod 5. The nut 921 is connected. Two ear parts 972 are provided symmetrically along the radial direction of the ring part 971 , and each ear part 972 is respectively connected to a first nut 921 , and two first push-pull rods 5 are respectively connected to the ring part 971 and arranged symmetrically.

As shown in Fig. 1, Fig. 2 and Fig. 5, the driving device may also include a half-drum drive assembly 10, and the half-drum drive assembly 10 includes a half-drum drive member 101, a third lead screw 102, a third nut 103 and a fourth nut 104 , the third lead screw 102 is threadedly connected with the third nut 103 and the fourth nut 104 respectively, the third nut 103 is connected with the first half-drum 3, the fourth nut 104 is connected with the second half-drum 6, and the half-drum driver 101 is set In order to drive the third lead screw 102 to rotate, the first half drum 3 and the second half drum 6 move closer to each other or move away from each other. The half-drum driver 101 can be a motor, the output shaft of the motor can be coaxially arranged with the drum shaft 2, and the output shaft of the motor can drive the third lead screw 102 to rotate through the reducer. When the third lead screw 102 rotates, the third nut 103 and the fourth nut 104 are close to each other or far away from each other, so that the first half drum 3 and the second half drum 6 move closer to each other or move farther away, that is, realize half drum separation. action.

As shown in FIG. 5 , the driving device further includes a drum shaft driving assembly 11 configured to drive the drum shaft 2 to rotate around its own axis. The drum shaft driving assembly 11 can be driven by a motor to drive the conveyor belt, and then drive the drum shaft 2 to rotate. The installation position is not limited, and the installation space in the cabinet 1 can be fully utilized.

In the tire building drum provided in this embodiment, the first push-pull rod 5 and the second push-pull rod 8 respectively adopt a rod-shaped structure, which has a simple structure, low manufacturing cost, high structural strength and rigidity, convenient control, and improved push-pull precision. and stability, the synchronous drive assembly 9 has a high degree of integration, which can reduce the overall volume of the chassis 1, and the second push-pull rod 8 is located outside the drum shaft 2, which reduces the complexity of the internal structure of the drum shaft 2, is easy to maintain, and has a low failure rate.

Claims

A tire building drum comprising:

Chassis (1);

a drum shaft (2), extending from the inside of the casing (1) to the outside of the casing (1);

The first half-drum (3) and the second half-drum (6) are respectively sleeved outside the drum shaft (2) and arranged oppositely, and the first half-drum (3) is provided with a first turn-up rod mechanism ( 4), the second half-drum (6) is provided with a second turn-up rod mechanism (7);

The transmission device includes a first push-pull rod group and a second push-pull rod group, the first push-pull rod group is arranged in the drum shaft (2), and the first push-pull rod group includes at least two A first push-pull rod (5) connected to a turn-up rod mechanism (4), the second push-pull rod group is arranged outside the drum shaft (2), and the second push-pull rod group includes at least two The second push-pull rod (8) connected to the second turn-up rod mechanism (7) mentioned above; and

A driving device is arranged in the chassis (1), the driving device includes a synchronous driving assembly (9), and the synchronous driving assembly (9) is configured to drive the first push-pull rod (5) and the second The push-pull rods (8) move synchronously, so that the first turn-up rod mechanism (4) and the second turn-up rod mechanism (7) rise and fall synchronously.
The tire building drum according to claim 1, wherein the synchronous drive assembly (9) comprises a synchronous drive member (91), a first ball screw pair (92) and a second ball screw pair (93), the The first nut (921) of the first ball screw pair (92) is connected to the first push-pull rod (5), and the second nut (931) of the second ball screw pair (93) is connected to the The second push-pull rod (8) is connected, and the synchronous driving member (91) is set to drive the first lead screw (922) of the first ball screw pair (92) and the second ball screw pair (93) ) of the second lead screw (932) rotates synchronously, so that the first turn-up lever mechanism (4) and the second turn-up lever mechanism (7) move closer to each other or move away from each other.
The tire building drum according to claim 2, wherein the synchronous drive assembly (9) further comprises a first synchronous wheel (94), a second synchronous wheel (95) and a synchronous linkage (96), the synchronous drive The piece (91) is set to drive the first synchronous wheel (94) or the second synchronous wheel (95) to rotate, and the first synchronous wheel (94) is synchronized with the second synchronous wheel (96) through the synchronous linkage The wheels (95) rotate synchronously, the first synchronous wheel (94) is connected with the first lead screw (922), and the second synchronous wheel (95) is connected with the second lead screw (932).
The tire building drum according to claim 3, wherein the synchronous linkage (96) is a synchronous belt, and the first synchronous wheel (94) and the second synchronous wheel (95) are respectively synchronous pulleys; Or, the synchronous linkage (96) is a chain, and the first synchronous wheel (94) and the second synchronous wheel (95) sprocket respectively.
The tire building drum according to claim 2, wherein the synchronous drive assembly (9) further comprises a connecting sleeve (97) and a connecting rod (98), and the first push-pull rod (5) passes through the connecting sleeve ( 97) is connected with the first nut (921), and the second push-pull rod (8) is connected with the second nut (931) through the connecting rod (98).
The tire building drum according to claim 5, wherein, the connecting sleeve (97) comprises a connected ring portion (971) and an ear portion (972), the ring portion (971) is connected to the drum shaft (2 ) are arranged coaxially, the ring portion (971) is connected to the first push-pull rod (5), and the ear portion (972) is connected to the first nut (921).
The tire building drum according to claim 6, wherein two sets of the first push-pull rod (5) and the first ball screw pair (92) are respectively provided, and one set of the connecting sleeve (97) is provided. , the connecting sleeve (97) is simultaneously connected with the two first push-pull rods (5) and the two first nuts (921); the second push-pull rod (8), the second ball wire There are two lever pairs (93) and two connecting rods (98), each of the second push-pull rods (8) is connected to one second nut (931) through one connecting rod (98) .
The tire building drum according to claim 1, wherein the first turn-up bar mechanism (4) comprises a first turn-up bar mechanism body (41) and a first push-pull plate (42), the first push-pull plate The first end of (42) is connected with the first turn-up rod mechanism main body (41), and the second end of the first push-pull plate (42) is connected with the first push-pull rod (5); Two turn-up lever mechanisms (7) comprise a second turn-up lever mechanism main body (71) and a second push-pull plate (72), the first side of the second push-pull plate (72) is connected to the second turn-up lever mechanism The main body (71) is connected, and the second side of the second push-pull plate (72) is connected with the second push-pull rod (8).
The tire building drum according to claim 1, wherein the driving device further comprises a half-drum driving assembly (10), and the half-drum driving assembly (10) includes a half-drum driving member (101), a third lead screw ( 102), the third nut (103) and the fourth nut (104), the third lead screw (102) is threadedly connected with the third nut (103) and the fourth nut (104) respectively, the The third nut (103) is connected with the first half-drum (3), the fourth nut (104) is connected with the second half-drum (6), and the half-drum driver (101) is set to drive The third lead screw (102) rotates to move the first half-drum (3) and the second half-drum (6) closer to each other or move away from each other.
The tire building drum according to any one of claims 1-9, wherein the driving device further comprises a drum shaft driving assembly (11), and the drum shaft driving assembly (11) is configured to drive the drum shaft (2 ) around Rotate on its own axis.