An automatically adjustable width forming drum

Abstract

The application relates to the technical field of forming drums, and discloses a forming drum capable of automatically adjusting drum width, which is characterized in that a drum width adjusting mechanism is arranged, drum width can be adjusted by rotating a ball screw, the ball screw can be driven by a manual operation or an external motor, and an axial position adjusting mechanism of a reverse wrapping mechanism is arranged to synchronously adjust the axial position of the reverse wrapping mechanism, so that the working efficiency is effectively improved and manpower is saved.

Description

Technical Field

[0001] This utility model relates to the field of molding drum technology, and more specifically, to a molding drum with automatic drum width adjustment. Background Technology

[0002] Spring wrapping molding drums are core equipment in the tire / air spring molding industry. They utilize the elastic force of springs to complete the rubber wrapping process and are widely used in the preform molding of motorcycle, bicycle, and electric vehicle tires and air springs. They can wrap and bond raw materials such as cord fabric and rubber according to process requirements. An unmodified spring wrapping molding drum, such as... Figure 1 As shown, a drum shaft is located at the center of the forming drum. From the drum shaft outwards radially, an expansion / contraction mechanism, drum tiles, and a drum belt are arranged sequentially, while a reverse wrapping mechanism is located on both sides of the expansion / contraction mechanism. Two rows of drum tiles are evenly distributed along the circumference of the forming drum, and a support block is located between the two rows of drum tiles, forming an arc-shaped working panel that supports the rubber material. The surface of the arc-shaped working panel is covered with several parallel stainless steel lining plates.

[0003] In actual tire production, the drum width needs to be adjusted according to the tire specifications. Currently, adjusting the drum width requires manually removing all the drum bands on the molded drum, then removing the screws and stainless steel liner on the middle support block, and then loosening the fixing bolts on the drum bearing. After the drum bearing is loosened, it can be moved left and right to adjust the drum width. The whole process is time-consuming and cumbersome. Summary of the Invention

[0004] This invention addresses the shortcomings of existing technologies by providing a molding drum with automatic drum width adjustment.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An automatically adjustable drum forming drum has a drum shaft, an expansion and contraction mechanism, drum tiles and a drum belt arranged radially from the center outwards. A reverse wrapping mechanism is arranged on both sides of the expansion and contraction mechanism. The forming drum also includes a drum width adjustment mechanism. The drum width adjustment mechanism includes a ball screw disposed in the drum shaft and two sets of left-right symmetrical drum width adjustment linkage units disposed on the ball screw; the drum width adjustment linkage unit includes a first ball screw nut and several sets of drum width adjustment linkage mechanisms distributed circumferentially thereon; the drum width adjustment linkage mechanism includes left and right displacement positioning discs and dovetail groove guide components arranged radially in sequence, the left and right displacement positioning discs being driven to the first ball screw nut through a pitch adjustment ring assembly, and the dovetail groove guide components being driven to the drum tile; One end of the ball screw is provided with a screw locking clamp or coupling.

[0006] Preferably, the forming drum further includes an axial position adjustment mechanism for the reverse wrapping mechanism. The axial position adjustment mechanism for the reverse wrapping mechanism includes a ball screw disposed in the drum shaft and two sets of left-right symmetrical axial position adjustment linkage units disposed on the ball screw. The axial position adjustment linkage unit for the reverse wrapping mechanism includes a second ball screw nut and a displacement pin shaft for the reverse wrapping mechanism connected thereto. An adjustable displacement sleeve is provided at the bottom of the reverse wrapping mechanism, and the displacement pin shaft for the reverse wrapping mechanism connects the second ball screw nut and the adjustable displacement sleeve.

[0007] Preferably, the adjustable displacement ring assembly includes a displacement ring pin, an adjustable displacement ring, and a fixed ring. The adjustable displacement ring is connected to the first ball screw nut via the displacement ring pin, and the fixed ring is connected to the left and right displacement positioning discs via fasteners. The fixed ring and the left and right displacement positioning discs are all connected to the adjustable displacement ring via a convex-concave engagement.

[0008] Preferably, the left and right displacement positioning disks and the fixing ring are respectively arranged on the left and right sides of the adjustable displacement ring.

[0009] Preferably, the dovetail groove guide assembly includes a dovetail groove displacement block and a dovetail guide strip that cooperates with it. The dovetail guide strip is disposed on the outside of the expansion and contraction mechanism. The dovetail groove displacement block is disposed on the inside of the drum block, and its end is connected to the left and right displacement positioning discs for transmission.

[0010] Preferably, the left and right displacement positioning disk is provided with an expansion and contraction guide rod, which is connected by fasteners.

[0011] Preferably, a first ball screw nut sleeve is provided on the outside of the first ball screw nut, and the displacement ring pin is provided on the first ball screw nut sleeve.

[0012] Preferably, a second ball screw nut sleeve is provided on the outside of the second ball screw nut, and the displacement pin of the reverse wrapping mechanism is provided on the second ball screw nut sleeve.

[0013] Preferably, one end of the ball screw is provided with a transition flange.

[0014] Preferably, the anti-wrapping mechanism includes an anti-wrapping connecting rod pair, and the end of the drum tile is provided with a groove portion that is adapted to the end of the anti-wrapping connecting rod pair.

[0015] This application adopts the above solution and provides a semi-mechanically driven automatic drum width adjustment forming drum. By setting a drum width adjustment mechanism, the drum width can be adjusted simply by rotating the ball screw. The ball screw can be driven manually or by an external motor. Furthermore, by setting an axial position adjustment mechanism for the reverse wrapping mechanism, the axial position of the reverse wrapping mechanism can be adjusted synchronously, which is convenient and quick, effectively improves work efficiency, and saves manpower. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the molded drum before the improvement.

[0017] Figure 2 This is a cross-sectional view of the expanded drum of Embodiment 1 of this application.

[0018] Figure 3 for Figure 2 Enlarged view at point a, schematic diagram of the drum width adjustment linkage unit.

[0019] Figure 4 for Figure 2 The sectional view of CC (this sectional view is mainly used to show the installation and fit of the dovetail guide bar and the dovetail groove displacement block from the axial side, so it mainly shows the dovetail guide bar and the dovetail groove displacement block, and omits the drum, connecting rod pair, main shaft and other structures).

[0020] Figure 5 for Figure 2 A sectional view of DD.

[0021] Figure 6 This is a cross-sectional view of the shrinkage state of the molding drum in Embodiment 1 of this application.

[0022] Figure 7 This is a cross-sectional view of the expanded drum in reverse wrapping state of the molding drum in Embodiment 1 of this application.

[0023] Figure 8 This is a cross-sectional view of the expanded drum of Embodiment 2 of this application.

[0024] Reference numerals: 100-Drum shaft, 200-Drum tile, 201-Support block, 300-Drum belt, 400-Expansion / contraction mechanism, 401-Expansion / contraction guide rod, 500-Reverse wrapping mechanism, 501-Reverse wrapping connecting rod pair, 10-Ball screw, 101-First ball screw nut, 102-Second ball screw nut, 11-Screw locking clamp, 120-Displacement ring pin, 121-Adjustable displacement ring, 122-Fixing ring, 13-Left and right displacement positioning disc, 141-Dovetail groove displacement block, 142-Dovetail guide strip, 15-Reverse wrapping mechanism displacement pin, 16-Adjustable displacement sleeve, 17-Transition flange, 18-Coupling, 19-Shaft end cover, 20-Expansion / contraction drum diameter limit bolt, 21-Tap roller bearing. Detailed Implementation

[0025] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present invention.

[0026] In the description of this application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0027] A type of molded drum with mechanically adjustable drum width, such as Figure 2-8 As shown, a drum shaft 100, an expansion and contraction mechanism, drum tiles 200 and a drum belt 300 are arranged radially from the center outwards. A reverse wrapping mechanism is arranged on both sides of the expansion and contraction mechanism. The forming drum also includes a drum width adjustment mechanism and an axial position adjustment mechanism for the reverse wrapping mechanism.

[0028] like Figure 2-5 As shown, the drum width adjustment mechanism includes a ball screw 10 disposed in the drum shaft 100 and two sets of symmetrical drum width adjustment linkage units disposed on the ball screw 10, with the two sets of drum width adjustment linkage units moving in opposite directions. Each drum width adjustment linkage unit includes a first ball screw nut 101 and several sets of drum width adjustment linkage mechanisms distributed circumferentially thereon; each drum width adjustment linkage mechanism includes left and right displacement positioning discs 13 and dovetail groove guide components arranged radially in sequence. The left and right displacement positioning discs 13 are connected to the first ball screw nut 101 via a pitch adjustment ring assembly, and the dovetail groove guide components are connected to the left and right displacement positioning discs 13 and the drum tile 200.

[0029] The adjustable displacement ring assembly includes a displacement ring pin 120, an adjustable displacement ring 121, and a fixing ring 122. The adjustable displacement ring 121 is connected to the first ball screw nut 101 via the displacement ring pin 120; the fixing ring 122 is connected to the left and right displacement positioning discs 13 via fasteners, which can be bolts. The fixing ring 122 and the left and right displacement positioning discs 13 are both connected to the adjustable displacement ring 121 via a convex-concave fit, wherein the left and right displacement positioning discs 13 and the fixing ring 122 can be respectively located on the left and right sides of the adjustable displacement ring 121.

[0030] The dovetail groove guide assembly includes a dovetail groove displacement block 141 and a cooperating dovetail guide strip 142. The dovetail guide strip 142 is located on the outside of the expansion and contraction mechanism. The dovetail groove displacement block 141 is located on the inside of the drum block 200, and its end is connected to the left and right displacement positioning disk 13 for transmission. An expansion and contraction guide rod 401 is provided inside the left and right displacement positioning disk 13. The expansion and contraction guide rod 401 is connected to the dovetail groove displacement block 141 by a fastener, which can be a bolt.

[0031] like Figure 2As shown, the reverse wrapping mechanism includes a reverse wrapping connecting rod pair 501. The end of the drum block 200 is provided with a groove that matches the end of the reverse wrapping connecting rod pair 501. The axial position adjustment mechanism of the reverse wrapping mechanism includes a ball screw 10 disposed in the drum shaft 100 and two sets of symmetrically arranged axial position adjustment linkage units on the ball screw 10. The movement directions of the axial position adjustment linkage units are opposite. Each axial position adjustment linkage unit includes a second ball screw nut 102 and a reverse wrapping mechanism displacement pin 15 connected to it. An adjustment displacement sleeve 16 is provided at the bottom of the reverse wrapping mechanism, and the adjustment displacement pin 15 connects the second ball screw nut 102 and the adjustment displacement sleeve 16. The second ball screw nut 102 is closer to the end of the ball screw 10 than the first ball screw nut 101.

[0032] like Figure 2 As shown, one end of the ball screw 10 is provided with a screw locking clamp 11 or a coupling 18, and the other end is provided with a transition flange 17 or a shaft end cover 19. Furthermore, tapered roller bearings 21 are installed at both ends of the ball screw 10.

[0033] Furthermore, a first ball screw nut sleeve 103 is provided on the outer side of the first ball screw nut 101, and a displacement ring pin 120 is provided on the first ball screw nut sleeve 103. The displacement ring pin 120 is connected to the first ball screw nut 101 through the first ball screw nut sleeve 103.

[0034] Furthermore, a second ball screw nut sleeve 104 is provided on the outer side of the second ball screw nut 102, and the displacement pin 15 of the reverse wrapping mechanism is provided on the second ball screw nut sleeve 104. The displacement pin 15 of the reverse wrapping mechanism is connected to the second ball screw nut 102 through the second ball screw nut sleeve 104.

[0035] Furthermore, each of the left and right displacement positioning discs 13 on the two sets of drum width adjustment linkage units is equipped with an axially mounted expansion and contraction drum diameter limiting bolt 20. This bolt can be used to adjust the drum diameter of the expansion and contraction drum and to limit the wobbling of the left and right displacement positioning discs 13, preventing unnecessary shaking during the rotation of the drum shaft 100. Specifically, the expansion and contraction drum diameter limiting bolt 20 is mainly used to adjust the drum diameter of the expansion and contraction drum, and includes a sleeve and a nut. The left-side contraction drum diameter limiting bolt 20 is used to adjust the contraction drum diameter, and the right-side expansion drum diameter limiting bolt 20 is used to adjust the expansion drum diameter. Both the left and right expansion and contraction drum diameter limiting bolts 20 pass through the through holes on the left and right displacement positioning discs 13 and are fixed in the threaded holes on the guide side plates on the left and right sides of the expansion and contraction mechanism. Example

[0036] A type of molded drum with mechanically adjustable drum width, such as Figure 2-7As shown, a drum shaft 100, an expansion and contraction mechanism, drum tiles 200 and a drum belt 300 are arranged radially from the center outwards. A reverse wrapping mechanism is arranged on both sides of the expansion and contraction mechanism. The forming drum also includes a drum width adjustment mechanism and an axial position adjustment mechanism for the reverse wrapping mechanism.

[0037] like Figure 2-5 As shown, the drum width adjustment mechanism includes a ball screw 10 disposed in the drum shaft 100 and two sets of symmetrical drum width adjustment linkage units disposed on the ball screw 10, with the two sets of drum width adjustment linkage units moving in opposite directions. Each drum width adjustment linkage unit includes a first ball screw nut 101 and several sets of drum width adjustment linkage mechanisms distributed circumferentially thereon. A first ball screw nut sleeve 103 is disposed on the outer side of the first ball screw nut 101. Each drum width adjustment linkage mechanism includes left and right displacement positioning discs 13 and dovetail groove guide components arranged radially in sequence. Each left and right displacement positioning disc 13 is provided with an axially extending expansion and contraction drum diameter limiting bolt 20. The left and right displacement positioning discs 13 are connected to the first ball screw nut 101 via an adjusting displacement ring assembly. The dovetail groove guide assembly is connected to the left and right displacement positioning discs 13 and the drum pad 200. Tapered roller bearings 21 are installed at both ends of the ball screw 10.

[0038] The adjustable displacement ring assembly includes a displacement ring pin 120, an adjustable displacement ring 121, and a fixing ring 122. The adjustable displacement ring 121 is connected to the first ball screw nut 101 via the displacement ring pin 120, which is mounted on the first ball screw nut sleeve 103 and is connected to the first ball screw nut 101 via the first ball screw nut sleeve 103. The fixing ring 122 is bolted to the left and right displacement positioning discs 13. Both the fixing ring 122 and the left and right displacement positioning discs 13 are connected to the adjustable displacement ring 121 via a convex-concave fit. The left and right displacement positioning discs 13 and the fixing ring 122 can be respectively located on the left and right sides of the adjustable displacement ring 121.

[0039] The dovetail groove guide assembly includes a dovetail groove displacement block 141 and a cooperating dovetail guide strip 142. The dovetail guide strip 142 is located on the outside of the expansion and contraction mechanism. The dovetail groove displacement block 141 is located on the inside of the drum block 200, and its end is connected to the left and right displacement positioning disk 13 for transmission. An expansion and contraction guide rod 401 is provided inside the left and right displacement positioning disk 13, and the expansion and contraction guide rod 401 is connected to the dovetail groove displacement block 141 by bolts.

[0040] like Figure 2As shown, the reverse wrapping mechanism includes a reverse wrapping connecting rod pair 501. The end of the drum block 200 is provided with a groove portion, which is adapted to the end of the reverse wrapping connecting rod pair 501. The axial position adjustment mechanism of the reverse wrapping mechanism includes a ball screw 10 disposed in the drum shaft 100 and two sets of left-right symmetrical axial position adjustment linkage units disposed on the ball screw 10. The movement directions of the axial position adjustment linkage units are opposite. The axial position adjustment linkage unit of the reverse wrapping mechanism includes a second ball screw nut 102 and a reverse wrapping mechanism displacement pin 15 connected to the second ball screw nut 102. A second ball screw nut sleeve 104 is provided on the outer side of the second ball screw nut 102. An adjustment displacement sleeve 16 is provided at the bottom of the reverse wrapping mechanism, and the reverse wrapping mechanism displacement pin 15 connects the second ball screw nut 102 and the adjustment displacement sleeve 16. The tail end of the displacement pin 15 of the reverse wrapping mechanism is mounted on the second ball screw nut sleeve 104, and is connected to the second ball screw nut 102 via the second ball screw nut sleeve 104; the top end of the displacement pin 15 of the reverse wrapping mechanism is mounted on the adjustable displacement sleeve 16 and is fixed by bolts. The second ball screw nut 102 is closer to the end of the ball screw 10 than the first ball screw nut 101.

[0041] like Figure 2 As shown, the left end of the ball screw 10 is provided with a screw locking clamp 11, and the right end is provided with a transition flange 17.

[0042] Example 1: The principle of adjusting the drum width of the molding drum is as follows: The employee manually loosens the screw locking clamp 11, and then rotates the ball screw 10 with a wrench. At this time, the two first ball screw nuts 101 move in opposite directions. The first ball screw nuts 101 drive the adjusting displacement ring 121 through the displacement ring pin 120. The adjusting displacement ring 121 is linked to the left and right displacement positioning discs 13. The left and right displacement positioning discs 13 drive the dovetail groove displacement block 141 to generate axial displacement along the dovetail guide strip 142, that is, left and right displacement, thereby adjusting the drum width.

[0043] When the inverted state, the end of the reverse-wrapping connecting rod 501 is located within the groove of the drum block 200. Therefore, adjusting the drum width requires adjusting the axial position of the reverse-wrapping connecting rod 501. Simultaneously, as the operator adjusts the drum width, the two second ball screw nuts 102 also move in the opposite direction. The left-hand second ball screw nut 102 moves in the same direction as the first ball screw nut 101, and the right-hand nut moves similarly. The second ball screw nut 102 drives the adjusting displacement sleeve 16 via the displacement pin 15 of the reverse-wrapping mechanism. The adjusting displacement sleeve 16 then undergoes axial displacement, i.e., left-right displacement, thereby adjusting the position of the reverse-wrapping connecting rod 501. Example

[0044] The main difference between this embodiment and Embodiment 1 is that, Figure 8As shown, the ball screw 10 has a shaft end cover 19 on its left end and a coupling 18 on its right end. The coupling 18 is driven by an external motor to rotate the ball screw 10.

[0045] The above description of embodiments of the present invention, through which those skilled in the art are able to implement or use the present invention, will be readily apparent to those skilled in the art. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. A molding drum with automatic width adjustment, comprising a drum shaft (100), an expansion and contraction mechanism, drum tiles (200), and a drum belt (300) arranged radially from the center outwards, with a reverse wrapping mechanism disposed on both sides of the expansion and contraction mechanism, characterized in that, The forming drum also includes a drum width adjustment mechanism; The drum width adjustment mechanism includes a ball screw (10) disposed in the drum shaft (100) and two sets of left-right symmetrical drum width adjustment linkage units disposed on the ball screw (10); the drum width adjustment linkage unit includes a first ball screw nut (101) and several sets of drum width adjustment linkage mechanisms distributed along its circumference; the drum width adjustment linkage mechanism includes left and right displacement positioning discs (13) and dovetail groove guide components arranged radially in sequence, the left and right displacement positioning discs (13) being connected to the first ball screw nut (101) through the pitch adjustment ring assembly, and the dovetail groove guide components being connected to the left and right displacement positioning discs (13) and the drum tile (200).

2. The forming drum with automatic drum width adjustment according to claim 1, characterized in that, The forming drum also includes an axial position adjustment mechanism for the reverse wrapping mechanism. The axial position adjustment mechanism for the reverse wrapping mechanism includes a ball screw (10) disposed in the drum shaft (100) and two sets of left-right symmetrical axial position adjustment linkage units for the reverse wrapping mechanism disposed on the ball screw (10). The axial position adjustment linkage unit for the reverse wrapping mechanism includes a second ball screw nut (102) and a displacement pin (15) for the reverse wrapping mechanism connected thereto. An adjustment displacement sleeve (16) is provided at the bottom of the reverse wrapping mechanism. The displacement pin (15) for the reverse wrapping mechanism connects the second ball screw nut (102) and the adjustment displacement sleeve (16).

3. A molding drum with automatic drum width adjustment according to claim 1 or 2, characterized in that, The adjustable displacement ring assembly includes a displacement ring pin (120), an adjustable displacement ring (121), and a fixed ring (122). The adjustable displacement ring (121) is connected to the first ball screw nut (101) through the displacement ring pin (120). The fixed ring (122) is connected to the left and right displacement positioning discs (13) through fasteners. The fixed ring (122) and the left and right displacement positioning discs (13) are all connected to the adjustable displacement ring (121) through a concave-convex fit transmission connection.

4. The forming drum with automatic drum width adjustment according to claim 3, characterized in that, The left and right displacement positioning disks (13) and the fixed rings (122) are respectively set on the left and right sides of the adjustable displacement ring (121).

5. A molding drum with automatic drum width adjustment according to claim 1 or 2, characterized in that, The dovetail groove guide assembly includes a dovetail groove displacement block (141) and a dovetail guide strip (142) that cooperates with it. The dovetail guide strip (142) is located on the outside of the expansion and contraction mechanism. The dovetail groove displacement block (141) is located on the inside of the drum block (200), and its end is connected to the left and right displacement positioning disk (13) for transmission.

6. A molding drum with automatic drum width adjustment according to claim 5, characterized in that, The left and right displacement positioning disk (13) is provided with an expansion and contraction guide rod (401), and the expansion and contraction guide rod (401) is connected to the dovetail groove displacement block (141) by fasteners.

7. A molding drum with automatic drum width adjustment according to claim 3, characterized in that, A first ball screw nut sleeve (103) is provided on the outside of the first ball screw nut (101), and a displacement ring pin (120) is provided on the first ball screw nut sleeve (103).

8. A molding drum with automatic drum width adjustment according to claim 2, characterized in that, A second ball screw nut sleeve (104) is provided on the outside of the second ball screw nut (102), and the displacement pin (15) of the reverse wrapping mechanism is provided on the second ball screw nut sleeve (104).

9. A molding drum with automatic drum width adjustment according to claim 1 or 2, characterized in that, One end of the ball screw (10) is provided with a screw locking clamp (11) or a coupling (18).

10. A molding drum with automatic drum width adjustment according to claim 1 or 2, characterized in that, One end of the ball screw (10) is provided with a transition flange (17) or a shaft end cover (19).

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