Improved collapsible oil cylinder for coiling machine

Abstract

The utility model relates to a modified collapsible oil cylinder for a coiling machine in the technical field of collapsible oil cylinder modification, which comprises a support, a stop frame, a swivel joint, an end cover, a cylinder barrel, a flange plate and a piston, and is characterized in that the piston is coaxially connected with a piston rod, and the outer end part of the piston rod hermetically penetrates through the flange plate; an adjusting cover is installed on the inner side face of the end cover or the flange plate through a connecting piece and used for limiting the stroke of the piston. The adjusting cover is further provided with an oil way channel coaxial with the end cover oil way or the flange plate oil way. The adjusting cover is additionally arranged on the inner side of the end cover or the flange plate, the maximum displacement of the piston is directly limited, the stroke of the oil cylinder is accurately matched with the shortening amount of a reformed coiling shaft, and the problem that a steel coil cannot be pressed due to the fact that the stroke of original equipment is too long is solved; meanwhile, the adjusting cover is provided with an oil way channel, a modified hydraulic oil flow channel is free of blocking and turbulent flow, and the pressure stability of an original system is kept.

Description

Technical Field

[0001] This utility model relates to the field of expansion and contraction cylinder modification technology, and in particular to a modified expansion and contraction cylinder for a winding machine. Background Technology

[0002] Hot rolling coilers are key equipment in steel hot rolling production lines. They are mainly used to roll metal sheets (such as strip steel, steel plates, etc.) after high-temperature rolling into tight steel coils for subsequent transportation, storage or cold rolling processing.

[0003] Due to changes in the company's production tasks, the current hot-rolled coiler cannot effectively utilize the current production plan. Therefore, the company has modified the existing hot-rolled coiler's coiling shaft. However, the modified coiling shaft has reduced its expansion and contraction capacity, and the original expansion and contraction cylinders (such as...) Figure 1 As shown, the assembly includes a bracket 1, a stop bracket 2, a rotary joint 3, an end cover 4, a cylinder 5, a flange 6, a piston 7, and a piston rod 8. The rotary joint 3 and flange 6 have internal oil passages communicating with the chambers on both sides of the piston 7. For the current winding shaft, the stroke is relatively long, necessitating a reduction in the stroke of the expansion and contraction cylinder. Purchasing a new expansion and contraction cylinder would not only increase costs but also waste the existing cylinder resources.

[0004] Therefore, we modified the original expansion and contraction cylinder to save resources and costs, and designed a modified expansion and contraction cylinder for winding machines. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model discloses a modified expansion and contraction cylinder for a winding machine.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A modified expansion and contraction cylinder for a winding machine includes a bracket, a stop frame, a rotary joint, an end cover, a cylinder barrel, a flange, and a piston. The piston is characterized by: a piston rod coaxially connected to the piston, with the outer end of the piston rod sealingly penetrating the flange; and an adjustment cover installed on the inner side of the end cover or flange via a connector to limit the piston's stroke.

[0008] The adjusting cover is also provided with an oil passage coaxial with the oil passage of the end cover or the oil passage of the flange.

[0009] Furthermore, the inner side of the end cap is provided with a plurality of threaded holes evenly spaced around its circumference; the adjusting cover is provided with countersunk holes corresponding to the threaded holes one by one, and the connecting member is a countersunk bolt that passes through the countersunk hole and is screwed into the threaded hole.

[0010] Furthermore, the inner side of the flange is provided with a plurality of threaded holes evenly spaced around its circumference; the adjusting cover is provided with countersunk holes corresponding one-to-one with the threaded holes and a central hole for the piston rod to pass through; the connecting member is a countersunk bolt that passes through the countersunk hole and is screwed into the threaded hole.

[0011] Furthermore, the flange is provided with a plurality of through holes at uniform intervals along its circumference; the adjusting cover is provided with threaded holes corresponding one-to-one with the through holes and a central hole for the piston rod to pass through; the connecting member is a stud structure that seals through the through holes and is screwed into the threaded holes.

[0012] Furthermore, the stud structure includes a double-ended stud, the inner threaded portion of which mates with the threaded hole on the adjusting cover, the stud body having an expanded neck that is sealed and pressed against the inner side of the flange; and a clamping nut is screwed onto the outer threaded portion of the double-ended stud.

[0013] Furthermore, a protruding sealing ring is embedded in the outer end face of the neck or the inner end face of the flange to enhance the sealing between the neck and the flange.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. By adding an adjusting cover inside the end cover or flange, the maximum displacement of the piston is directly limited, so that the stroke of the hydraulic cylinder is precisely matched with the shortening of the winding shaft after the modification, thus solving the problem of the original equipment being unable to clamp the steel coil due to its excessive stroke; at the same time, the adjusting cover is equipped with an oil passage, so that the hydraulic oil flow path is unobstructed and turbulent after the modification, maintaining the pressure stability of the original system.

[0016] 2. The stud structure and sealing ring design allow for flexible adjustment of the piston stroke without changing the original piston rod size, preparing for changes in expansion and contraction due to subsequent improvements to the winding shaft, making later modifications more convenient. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a structure in the prior art;

[0018] Figure 2 This is a schematic diagram of the first structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the second structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the third structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the connecting member in the third structure of this utility model.

[0022] In the diagram: 1. Bracket; 2. Stop bracket; 3. Rotary joint; 4. End cover; 5. Cylinder; 6. Flange; 7. Piston; 8. Piston rod; 9. Adjusting cover; 91. Oil passage; 10. Connecting piece; 101. Double-ended stud; 102. Neck expansion; 103. Compression nut; 11. Sealing ring. Detailed Implementation

[0023] The present invention will be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention. In the description of the present invention, it should be understood that if terms such as "upper", "lower", "front", "rear", "left", "right" indicate orientation or positional relationship, they are only corresponding to the drawings of this application for the convenience of describing the present invention. It should be understood that if terms such as "end", "side", "end portion", "side part", "lateral", "longitudinal", etc. indicate orientation or positional relationship, they are only corresponding to the length and width of the corresponding component. That is, "end" indicates the head and tail area in the length direction of the corresponding component, and "side part" indicates the head and tail area in the width direction of the corresponding component. They are used for the convenience of describing the present invention and do not indicate or imply that the device or element referred to must have a specific orientation.

[0024] Example 1, in conjunction with Appendix Figure 2 A modified expansion and contraction cylinder for a winding machine includes a bracket 1, a stop bracket 2, a rotary joint 3, an end cap 4, a cylinder barrel 5, a flange 6, a piston 7, and a coaxially connected piston rod 8. The modification steps are as follows:

[0025] Machining end cap 4: Machining 6 M12 threaded holes (not labeled in the figure) evenly along the circumferential direction on the inner end face of end cap 4.

[0026] Install adjustment cover 9:

[0027] A circular adjusting cover 9 is selected, the outer diameter of which matches the inner diameter of the cylinder 5. Six countersunk holes corresponding to the threaded holes are provided on one end face. The countersunk bolt (connector 10) passes through the countersunk holes and is screwed into the threaded hole of the end cover 4 so that the adjusting cover 9 fits tightly against the inner side of the end cover 4.

[0028] Oil circuit connection design: An oil circuit channel 91 is opened in the middle of the adjustment cover 9, which is coaxially connected with the original oil circuit of the end cover 4 to ensure unobstructed flow of hydraulic oil.

[0029] Effect: When the adjusting cover 9 is inserted into the cylinder 5, the piston 7 is blocked by the adjusting cover 9 when it moves to the left, and the stroke is shortened. The thickness of the adjusting cover 9 is designed according to the expansion and contraction amount of the improved winding shaft, and no specific limit is made here.

[0030] It should be noted that the piston rod 8 in this embodiment has a shorter axial length than the existing piston rod 8. That is, a new piston rod 8 needs to be made during the modification process. Only the main body length changes, and the rest of the structure is the same as the existing piston rod 8. It will not be described in detail here.

[0031] Example 2, in conjunction with Appendix Figure 3 A modified expansion and contraction cylinder for a winding machine, differing from Embodiment 1 in that: the adjusting cover 9 is installed on the flange side, suitable for modification of the through end of the piston rod 8.

[0032] Modify flange 6: Machine 8 M10 threaded holes (blind holes) evenly around the inner side of flange 6.

[0033] Install adjustment cover 9:

[0034] The outer diameter of the adjusting cover 9 is matched with the inner diameter of the cylinder 5. The center of the adjusting cover 9 is opened to allow the piston rod 8 to pass through, and eight countersunk holes are provided on the edge.

[0035] The adjusting cover 9 is fixed to the inside of the flange 6 by countersunk bolts (connector 10);

[0036] Oil circuit design: The oil circuit channel 91 of the adjusting cover 9 is coaxially connected with the original oil circuit of the flange 6.

[0037] Example 3, in conjunction with Appendix Figure 4-5 A modified expansion and contraction cylinder for a winding machine, differing from Embodiment 2 in that: the adjusting cover 9 is installed on the flange side, suitable for the through end of the piston rod 8, and for modifications to accommodate changes in expansion and contraction caused by subsequent improvements to the winding shaft:

[0038] Flange 6 modification: Machining 6 through holes along the circumference.

[0039] The outer diameter of the adjusting cover 9 is matched with the inner diameter of the cylinder 5. A center hole for the piston rod 8 to pass through is opened in the center of the adjusting cover 9, and six threaded holes are provided on the edge.

[0040] The connector 10 includes a double-ended stud 101 and a clamping nut, and the double-ended stud 101 has an expanded neck 102 on its body.

[0041] Installation of connector 10:

[0042] The inner end of the double-ended stud 101 is screwed into the threaded hole of the adjusting cover 9; after the outer end of the double-ended stud 101 passes through the sealing ring 11 and the through hole, it is locked with the clamping nut 103, so that the expanding neck 102 presses against the sealing ring 11.

[0043] In one possible implementation, the sealing ring 11 is embedded in the outer end face of the neck 102, that is, the outer end face of the neck 102 is provided with an embedding groove.

[0044] In one possible implementation, the sealing ring 11 is embedded in the inner end face of the flange 6, that is, the inner end face of the flange 6 has an embedding groove.

[0045] Adjustment principle: First, use a wrench to loosen the clamping nut 103 so that the double-ended stud 101 is in a relatively free state. Then, use a wrench to rotate the double-ended stud 101 to adjust the position of the adjusting cover 9, thereby adjusting the stroke of the piston 7.

[0046] The parts of this utility model not described in detail are prior art. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that this utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the above embodiments should be regarded as exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended to include all changes that fall within the meaning and scope of the equivalents of the claims in this utility model, and no reference numerals in the claims should be regarded as limiting the content of the claims.

Claims

1. A modified expansion and contraction cylinder for a winding machine, comprising a bracket (1), a stop bracket (2), a rotary joint (3), an end cap (4), a cylinder barrel (5), a flange (6), and a piston (7), characterized in that: The piston (7) is coaxially connected to the piston rod (8), and the outer end of the piston rod (8) is sealed through the flange (6); the end cover (4) or the inner side of the flange (6) is equipped with an adjusting cover (9) through a connector (10) to limit the stroke of the piston (7); The adjusting cover (9) is also provided with an oil passage (91) that is coaxial with the oil passage of the end cover (4) or the oil passage of the flange (6).

2. The modified expansion and contraction cylinder for a winding machine according to claim 1, characterized in that: The inner side of the end cap (4) is provided with a plurality of threaded holes evenly spaced around its circumference; the adjusting cap (9) is provided with countersunk holes corresponding to the threaded holes one by one; the connecting piece (10) is a countersunk bolt that passes through the countersunk hole and is screwed into the threaded hole.

3. The modified expansion and contraction cylinder for a winding machine according to claim 1, characterized in that: The inner side of the flange (6) is provided with a plurality of threaded holes evenly spaced around its circumference; the adjusting cover (9) is provided with countersunk holes corresponding to the threaded holes and a central hole through which the piston rod (8) passes; the connecting piece (10) is a countersunk bolt that passes through the countersunk hole and is screwed into the threaded hole.

4. A modified expansion and contraction cylinder for a winding machine according to claim 1, characterized in that: The flange (6) has a plurality of through holes spaced evenly around its circumference; the adjusting cover (9) has threaded holes corresponding to the through holes and a central hole through which the piston rod (8) passes; the connecting piece (10) is a stud structure that seals through the through holes and is screwed into the threaded holes.

5. A modified expansion and contraction cylinder for a winding machine according to claim 4, characterized in that: The stud structure includes a double-ended stud (101), the inner threaded part of the double-ended stud (101) is engaged with the threaded hole on the adjusting cover (9), the stud body of the double-ended stud (101) is provided with an expanded neck (102), and the expanded neck (102) is sealed and pressed against the inner side of the flange (6); the outer threaded part of the double-ended stud (101) is screwed with a compression nut (103).

6. A modified expansion and contraction cylinder for a winding machine according to claim 5, characterized in that: A protruding sealing ring (11) is embedded in the outer end face of the neck (102) or the inner end face of the flange (6) to enhance the sealing between the neck (102) and the flange (6).

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