Reducing collapsible drum

Abstract

The utility model discloses a variable-diameter collapsible winding drum which comprises a collapsible oil cylinder, a piston rod of the collapsible oil cylinder is connected with a pull rod, the outer side of the pull rod is sleeved with a winding drum main shaft, a sliding groove is formed in the winding drum main shaft in the axial direction, an axial wedge is arranged in the sliding groove and connected with the pull rod, and a radial wedge matched with the axial wedge is arranged on the outer side of the axial wedge. A plurality of sectors are further arranged on the outer side of the winding drum spindle, the radial wedges abut against the sector plates, the pull rod drives the axial wedges to move axially, the radial wedges drive the sector plates to move radially under the action of the axial wedges, and springback mechanisms corresponding to the sector plates are further arranged on the winding drum spindle. The diameter of the winding drum can be rapidly reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of metal coil manufacturing equipment, and in particular relates to a variable diameter expansion and contraction reel. Background Art

[0002] The steel strip uncoiler is an indispensable and important equipment for steel production. It is used to support the steel strip and unwind the steel strip coil. The core part of the uncoiler is the expansion and contraction reel, which directly affects the technical performance of the uncoiler. In the field of steel rolling and non-ferrous metals in the metallurgical industry, many quick-change reels are due to traditional inclined surface contact, the fan-shaped plate is difficult to process, and the fan-shaped plate and the inclined wedge are difficult to ensure complete consistency, resulting in the friction surface between the fan-shaped plate and the axial wedge being too long. In addition, the friction between the axial wedge and the main shaft is rigid friction, which increases the friction force. When shrinking the diameter, the reel cannot shrink freely, resulting in the inability to quickly unload the steel or aluminum coil, which seriously affects the production of the entire line. Utility Model Content

[0003] The utility model aims to provide a variable diameter expansion and contraction reel, which can quickly reduce the reel diameter and increase production efficiency.

[0004] The technical solution adopted by the utility model is that the variable diameter expansion and contraction reel includes an expansion and contraction oil cylinder, the piston rod of the expansion and contraction oil cylinder is connected with a pull rod, the outer side of the pull rod is sleeved with a reel main shaft, a slide groove is opened along the axial direction of the reel main shaft, an axial inclined wedge is arranged in the slide groove, the axial inclined wedge is connected with the pull rod, and a radial inclined wedge is installed on the outer side of the axial inclined wedge;

[0005] Several fan-shaped plates are also arranged on the outside of the reel main shaft, the radial wedges are in contact with the fan-shaped plates, the pull rod drives the axial wedges to move axially, and the radial wedges drive the fan-shaped plates to move radially under the push of the axial wedges. A rebound mechanism is also arranged on the reel main shaft corresponding to the fan-shaped plates.

[0006] The utility model is also characterized in that:

[0007] A spring is sleeved on one end of the pull rod close to the piston rod. The spring is fixed on the pull rod through a fixing nut. One end of the spring abuts against the fixing nut, and the other end abuts against the bottom of the reel main shaft.

[0008] A main shaft is sleeved on the outer side of the piston rod, and the main shaft is connected with the reel main shaft through bolts, and the main shaft and the reel main shaft are coaxially arranged.

[0009] Copper pads are fixedly connected to both sides of the axial inclined wedge, and a copper plate is fixedly connected to the bottom of the axial inclined wedge.

[0010] A lubrication hole is provided on the radial wedge, and grease is added to the bottom of the axial wedge through the lubrication hole.

[0011] The rebound mechanism includes a blind hole opened on the reel main shaft relative to the fan-shaped plate, and a fixing rod is arranged in the blind hole. One end of the fixing rod is fixedly connected to the reel main shaft, and the other end is inserted into the fan-shaped plate. One end of the fixing rod located in the fan-shaped plate is sleeved with a fan-shaped plate spring. When the fan-shaped plate moves away from the reel main shaft, the fan-shaped plate spring squeezes and gives the fan-shaped plate a pre-force toward the reel main shaft.

[0012] One end of the fixing rod is threadedly connected with a supporting ring, one end of the fan-shaped leaf spring is in contact with the supporting ring, and the other end is in contact with the fan-shaped plate.

[0013] The beneficial effects of the utility model are:

[0014] (1) The variable diameter expansion and contraction reel of the utility model reduces the contact area between the radial inclined wedge and the fan-shaped plate by changing the contact surface between the radial inclined wedge and the fan-shaped plate to a straight surface contact; and the straight surface is easier to process and keep consistent, thereby ensuring the symmetry of the overall reel. At the same time, the radial inclined wedge and the fan-shaped plate can better fit and contact, reducing the movement resistance of the fan-shaped plate, and realizing rapid change of the reel diameter.

[0015] (2) When the variable diameter expanding and contracting reel of the utility model expands in diameter, the fan-shaped plate moves radially toward the outside of the reel main shaft, and the fan-shaped leaf spring is compressed to store elastic force. When the expansion and contraction cylinder removes the pressure, the fan-shaped leaf spring releases the elastic force, and the fan-shaped plate moves rapidly toward the reel main shaft under the action of the fan-shaped leaf spring, thereby realizing rapid reduction of the reel.

[0016] (3) The utility model has copper pads installed on both sides of the axial wedge and a copper plate installed on the bottom of the variable diameter expansion and contraction reel, which reduces the friction of the axial wedge when it moves in the reel main shaft. The flexible movement adjustment of the axial wedge can make the radial wedge move radially relative to the reel main shaft more quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the variable diameter expansion and contraction reel of the utility model;

[0018] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0019] Figure 3 It is a schematic diagram of the radial cross-section structure of the variable diameter expansion and contraction reel of the utility model.

[0020] In the figure, 1. expansion and contraction cylinder, 2. main shaft, 3. piston rod, 4. fixing nut, 5. spring, 6. pull rod, 7. reel main shaft, 8. axial wedge, 9. radial wedge, 10. fan plate, 11. fan plate spring, 12. copper washer, 13. copper plate, 14. lubrication hole, 15. fixing rod, 16. support ring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Example 1

[0023] like Figure 1 As shown, the variable diameter expanding and contracting reel of the utility model comprises an expanding and contracting cylinder 1, the piston rod 3 of the expanding and contracting cylinder 1 is connected to a pull rod 6, a reel main shaft 7 is sleeved on the outer side of the pull rod 6, a slide groove is opened axially on the reel main shaft 7, an axial wedge 8 is arranged in the slide groove, the axial wedge 8 is connected to the pull rod 6, and a radial wedge 9 is installed on the outer side of the axial wedge 8.

[0024] That is, when the piston rod 3 drives the pull rod 6 to perform axial displacement movement, the axial beveled wedge 8 performs axial movement synchronously. Since the axial beveled wedge 8 and the radial beveled wedge 9 are fitted with inclined surfaces, when the axial beveled wedge 8 is displaced to one side, the radial beveled wedge 9 is pushed by the axial beveled wedge 8 to perform radial movement toward the outside of the reel main shaft 7.

[0025] A plurality of fan-shaped plates 10 are also arranged on the outside of the reel main shaft 7, and the radial inclined wedges 9 are in contact with the fan-shaped plates 10. The pull rod 6 drives the axial inclined wedges 8 to move axially. The radial inclined wedges 9 drive the fan-shaped plates 10 to move radially under the push of the axial inclined wedges 8, so as to realize the diameter change of the reel. A rebound mechanism is also arranged on the reel main shaft 7 corresponding to the fan-shaped plates 10.

[0026] By providing a rebound mechanism, after the expansion and contraction oil cylinder 1 releases the force, the sector plate 10 can quickly move toward the axis of the winding main shaft 7 to complete the diameter reduction.

[0027] Example 2

[0028] The utility model comprises an expanding and contracting reel with a variable diameter, comprising an expanding and contracting cylinder 1, a piston rod 3 of which is connected to a pull rod 6, a reel main shaft 7 is sleeved on the outer side of the pull rod 6, a slide groove is provided on the reel main shaft 7 along the axial direction, an axial inclined wedge 8 is arranged in the slide groove, the axial inclined wedge 8 is connected to the pull rod 6, and a radial inclined wedge 9 is installed on the outer side of the axial inclined wedge 8.

[0029] like Figure 2 As shown, a spring 5 is sleeved on one end of the pull rod 6 close to the piston rod 3. The spring 5 is fixed to the pull rod 6 through a fixing nut 4. One end of the spring 5 abuts against the fixing nut 4, and the other end abuts against the bottom of the reel main shaft 7.

[0030] Specifically, when the expansion movement is performed, the piston rod 3 pushes the pull rod 6 to move, and the spring 5 is squeezed to store elastic force. When the expansion cylinder 1 unloads the force, the spring 5 releases the elastic force, pushing the piston rod 3 to drive the pull rod 6 to move toward the side of the expansion cylinder 1, and at the same time drives the axial wedge 8 to reset, giving the radial wedge 9 sufficient space to fall back.

[0031] The outer side of the piston rod 3 is sleeved with a main shaft 2, and the main shaft 2 is connected to the reel main shaft 7 through bolts. The main shaft 2 and the reel main shaft 7 are coaxially arranged.

[0032] A plurality of fan-shaped plates 10 are also arranged on the outside of the reel main shaft 7, and the radial inclined wedges 9 are in contact with the fan-shaped plates 10. The pull rod 6 drives the axial inclined wedges 8 to move axially. The radial inclined wedges 9 drive the fan-shaped plates 10 to move radially under the push of the axial inclined wedges 8, so as to realize the diameter change of the reel. A rebound mechanism is also arranged on the reel main shaft 7 corresponding to the fan-shaped plates 10.

[0033] Example 3

[0034] On the basis of Example 2, Figure 3 As shown, the utility model has copper pads 12 fixedly connected on both sides of the axial wedge 8 of the variable diameter expansion and contraction reel, and a copper plate 13 fixedly connected on the bottom of the axial wedge 8. Since the axial wedge 8 is a slender piece, it is too easy to deform, resulting in obstruction of sliding with the reel main shaft 7. When retracting, only the spring 5 provides external force, and the radial wedge 9 needs to fall back automatically, which requires minimizing the resistance. By adding self-lubricating copper pads 12 on both sides of the axial wedge 8 and adding a copper plate 13 to the bottom, the side and bottom of the axial wedge 8 are in the same plane after assembly and match the clearance of the slide groove on the reel main shaft 7, thereby reducing resistance and free sliding, and achieving the purpose of rapid diameter reduction.

[0035] A lubrication hole 14 is provided on the radial wedge 9, and grease can be added to the bottom of the axial wedge 8 through the lubrication hole 14 at regular intervals.

[0036] The rebound mechanism includes a blind hole opened on the reel main shaft 7 relative to the fan-shaped plate 10, and a fixing rod 15 is arranged in the blind hole. One end of the fixing rod 15 is fixedly connected to the reel main shaft 7, and the other end is inserted into the fan-shaped plate 10. One end of the fixing rod 15 located in the fan-shaped plate 10 is sleeved with a fan-shaped plate spring 11. When the fan-shaped plate 10 moves away from the reel main shaft 7, the fan-shaped plate spring 11 squeezes and gives the fan-shaped plate 10 a pre-force toward the reel main shaft 7.

[0037] One end of the fixing rod 15 is threadedly connected to a supporting ring 16 , one end of the fan-shaped leaf spring 11 abuts against the supporting ring 16 , and the other end abuts against the fan-shaped plate 10 .

[0038] When the variable diameter expansion and contraction reel of the utility model is in the expansion operation, the expansion and contraction oil cylinder 1 is started, and the piston rod 3 pushes the pull rod 6 to move away from the expansion and contraction oil cylinder 1. At this time, the spring 5 is compressed, and the axial inclined wedge 8 moves synchronously with the pull rod 6 in the direction away from the expansion and contraction oil cylinder 1, and the inclined surface on the axial inclined wedge 8 pushes the radial inclined wedge 9 to move away from the reel main shaft 7. Since the radial inclined wedge 9 is in contact with the fan plate 10, the fan plate 10 moves radially in the direction away from the reel main shaft 7 synchronously, and at this time the fan plate spring 11 is compressed, and the fan plate 10 moves to the specified position to complete the expansion operation of the device.

[0039] When it is necessary to perform a diameter reduction operation, the expansion and contraction cylinder 1 unloads the force and the spring 5 releases the pressure. Under the action of the spring 5, the pull rod 6 and the axial wedge 8 are driven to move in the direction of the expansion and contraction cylinder 1; at the same time, the fan-shaped leaf spring 11 also releases the pressure, and the fan-shaped plate 10 moves toward the reel main shaft 7 under the action of the fan-shaped leaf spring 11. Since the axial wedge 8 retracts with the pull rod 6, there is room for movement at the bottom of the radial wedge 9. Therefore, the radial wedge 9 moves radially with the fan plate 10 to realize the diameter reduction operation of the device.

Claims

1. Variable diameter expansion and contraction reel, characterized in that: It comprises an expansion and contraction oil cylinder (1), wherein the piston rod (3) of the expansion and contraction oil cylinder (1) is connected to a pull rod (6), a reel main shaft (7) is sleeved on the outside of the pull rod (6), a slide groove is opened axially on the reel main shaft (7), an axial inclined wedge (8) is arranged in the slide groove, the axial inclined wedge (8) is connected to the pull rod (6), and a radial inclined wedge (9) is installed on the outside of the axial inclined wedge (8); A plurality of fan-shaped plates (10) are also provided on the outside of the reel main shaft (7), the radial inclined wedge (9) is in contact with the fan-shaped plate (10), the pull rod (6) drives the axial inclined wedge (8) to move axially, and the radial inclined wedge (9) drives the fan-shaped plate (10) to move radially under the push of the axial inclined wedge (8), and a rebound mechanism is also provided on the reel main shaft (7) corresponding to the fan-shaped plate (10); A spring (5) is sleeved on one end of the pull rod (6) close to the piston rod (3); the spring (5) is fixed to the pull rod (6) via a fixing nut (4); one end of the spring (5) abuts against the fixing nut (4), and the other end abuts against the bottom of the reel main shaft (7); Copper pads (12) are fixedly connected to both sides of the axial wedge (8), and a copper plate (13) is fixedly connected to the bottom of the axial wedge (8); The radial wedge (9) is provided with a lubrication hole (14), and lubrication grease is added to the bottom of the axial wedge (8) through the lubrication hole (14).

2. The variable diameter expansion and contraction reel according to claim 1, characterized in that: The piston rod (3) is sleeved with a main shaft (2) on its outer side, and the main shaft (2) is connected to the reel main shaft (7) via bolts, and the main shaft (2) and the reel main shaft (7) are coaxially arranged.

3. The variable diameter expansion and contraction reel according to any one of claims 1 to 2, characterized in that: The rebound mechanism comprises a blind hole formed in the reel main shaft (7) relative to the fan-shaped plate (10), wherein a fixing rod (15) is arranged in the blind hole, wherein one end of the fixing rod (15) is fixedly connected to the reel main shaft (7), and the other end of the fixing rod (15) penetrates into the fan-shaped plate (10), and one end of the fixing rod (15) located in the fan-shaped plate (10) is sleeved with a fan-shaped leaf spring (11), and when the fan-shaped plate (10) moves in a direction away from the reel main shaft (7), the fan-shaped leaf spring (11) squeezes and gives the fan-shaped plate (10) a pre-force to move toward the reel main shaft (7).

4. The variable diameter expansion and contraction reel according to claim 3, characterized in that: One end of the fixing rod (15) is threadedly connected to a support ring (16); one end of the fan-shaped leaf spring (11) abuts against the support ring (16) and the other end abuts against the fan-shaped plate (10).

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