Expansion and contraction device suitable for small-tension winding drum

Abstract

The expansion and contraction device comprises a cylinder body, a first cylinder cover and a second cylinder cover are arranged on the left side and the right side of the cylinder body respectively, a rotating connector is connected to the left side of the first cylinder cover, a spring and a piston rod are arranged in the cylinder body, spring covers are arranged at the left end and the right end of the spring respectively, and the piston rod is connected with the rotating connector. The right end face of the spring cover on the right side abuts against a piston rod, the piston rod divides an inner cavity of the cylinder body into a left cavity and a right cavity, the piston rod drives the springs and the spring covers to conduct leftward compression or rightward expansion movement under the action of hydraulic oil and an oil pump, and then the winding drum is linked to expand or contract. Through the optimized and improved design of the product, the expansion and contraction device can be widely applied to small-tension cold and hot rolling uncoiling machines and coiling blocks of coiling machines, a double-oil-way structure of the expansion and contraction device is changed into a single oil way structure, hydraulic pressure in the other direction is replaced by a spring structure, and therefore the purposes of reducing manufacturing cost and reducing oil way leakage probability are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a strip uncoiler equipment technical field, specifically, relate to a kind of expansion device suitable for small tension reel. BACKGROUND

[0002] The reel expansion device provides power for the expansion of the reel, and the expansion and contraction of the reel are realized by hydraulic pressure transmission. However, the traditional reel expansion device is generally of double-oil-path structure, one path for expansion and the other for contraction.

[0003] The small tension reel using the double-oil-path expansion device has the following disadvantages: the required expansion and contraction power of the small tension reel is small, the double-oil-path expansion device occupies a high proportion of the total value of the reel, and the cost performance is low; and the double-oil-path structure is complex and prone to leakage. SUMMARY

[0004] To overcome the above-mentioned deficiencies of the prior art, the utility model provides an expansion device suitable for a small tension reel.

[0005] To achieve the above technical purposes, the technical scheme of the utility model is as follows:

[0006] An expansion device suitable for a small tension reel;

[0007] The expansion device suitable for a small tension reel comprises a cylinder body, first and second cylinder covers arranged on the left and right sides of the cylinder body respectively, a rotary joint connected to the left side of the first cylinder cover, a spring and a piston rod arranged in the cylinder body, spring covers arranged at the left and right ends of the spring, a piston rod abutting against the right end face of the spring cover on the right side, the piston rod dividing the inner cavity of the cylinder body into left and right chambers, and the piston rod driving the spring and spring cover to move leftward for compression or rightward for expansion under the action of hydraulic oil and an oil pump, and further driving the reel to expand or contract.

[0008] Further, the rotary joint and the first cylinder cover are connected by a plurality of screws, and the rotary joint is connected with an oil pipe for providing hydraulic oil.

[0009] Further, the rotary joint and the first cylinder cover are connected by a plurality of screws, and the rotary joint is connected with an oil pipe for providing hydraulic oil.

[0010] Further, the first cylinder cover and the cylinder body are connected by a plurality of bolts, and the second cylinder cover is connected to the right side end of the cylinder body.

[0011] Further, the rotating joint, the first cylinder cover and the cylinder body are drilled and communicated to form an oil passage for providing the right chamber with hydraulic oil under pressure.

[0012] Further, the spring and the spring cover on the left are positioned by the first cylinder cover, and the right end of the spring and the spring cover on the right abuts against the piston rod.

[0013] Further, the first sealing member, the second sealing member and the guide strip are arranged between the piston rod and the cylinder body to prevent the hydraulic oil in the right chamber from leaking, and the first sealing member is fixed by the end cover.

[0014] Further, the cylinder body is formed with a process hole drilled, and the process hole is provided with a plug for plugging and preventing leakage.

[0015] Further, the inner hole of the second cylinder cover is provided with a dustproof sealing member for preventing dust from entering and damaging the seal.

[0016] The utility model discloses the beneficial effects: through the optimization improvement design of the utility model product, thereby make it can be widely used in small tension cold, hot rolled uncoiler, coiler reel, this expansion and contraction device changes double oil circuit structure into single oil circuit, uses spring structure to replace another direction's hydraulic pressure, and then reaches the purpose of reducing manufacturing cost, reducing oil circuit leakage probability. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating laboriously.

[0018] Fig. 1 It is the whole structure schematic diagram of right expansion state of the expansion and contraction device suitable for small tension reel according to the utility model embodiment;

[0019] Fig. 2 It is the whole structure schematic diagram of left compression of the expansion and contraction device suitable for small tension reel according to the utility model embodiment;

[0020] In the drawing: 1, rotating joint;2, O ring;3, screw;4, first cylinder cover;5, bolt;6, spring;7, spring cover;8, cylinder body;9, first sealing member;10, end cover;11, guide strip;12, second sealing member;13, dustproof sealing member;14, piston rod;15, second cylinder cover;16, plug;17, oil passage;18, oil pipe;19, left chamber;20, right chamber. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art are within the protection scope of the present utility model.

[0022] It should be understood that in the description of the embodiments of this utility model, the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model 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 the embodiments of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of the embodiments of this utility model, "several" means two or more, unless otherwise explicitly specified.

[0023] like Figs. 1-2 As shown in the figure, an expansion and contraction device suitable for low-tension drums according to an embodiment of the present invention includes a cylinder body 8. A first cylinder cover 4 and a second cylinder cover 15 are respectively provided on the left and right sides of the cylinder body 8. A rotary joint 1 is connected to the left side of the first cylinder cover 4. A spring 6 and a piston rod 14 are provided inside the cylinder body 8. A spring cover 7 is provided at both ends of the spring 6. The right end face of the spring cover 7 on the right side abuts against the piston rod 14. The piston rod 14 divides the inner cavity of the cylinder body 8 into a left chamber 19 and a right chamber 20. Under the action of hydraulic oil and oil pump, the piston rod 14 drives the spring 6 and the spring cover 7 to compress to the left or expand to the right, thereby linking the drum to expand or contract.

[0024] According to an embodiment of the present invention, an expansion and contraction device suitable for low-tension drums is provided. In a specific embodiment, the rotary joint 1 is connected to the first cylinder head 4 by a plurality of screws 3; the rotary joint 1 is connected to an oil pipe 18 for supplying hydraulic oil.

[0025] The utility model discloses a kind of expansion and contraction devices suitable for small tension reel, in a specific embodiment, the rotating joint 1 with the first cylinder cover 4 is equipped with the oil delivery hole being communicated with each other, the rotating joint 1 with the oil delivery hole connection of the first cylinder cover 4 is equipped with the O ring 2 for preventing leakage.

[0026] The utility model discloses a kind of expansion and contraction devices suitable for small tension reel, in a specific embodiment, the first cylinder cover 4 with the cylinder body 8 is connected by several bolts 5, the second cylinder cover 15 with the right side end of the cylinder body 8 is connected.

[0027] The utility model discloses a kind of expansion and contraction devices suitable for small tension reel, in a specific embodiment, the rotating joint 1, the first cylinder cover 4 and the cylinder body 8 are drilled and communicated and form oil passage 17, the oil passage 17 is used to provide the right chamber 20 with pressure hydraulic oil.

[0028] The utility model discloses a kind of expansion and contraction devices suitable for small tension reel, in a specific embodiment, the spring 6 and left side spring cover 7 are positioned by the first cylinder cover 4, the right end of the spring 6 and right side spring cover 7 is abutted with the piston rod 14.

[0029] The utility model discloses a kind of expansion and contraction devices suitable for small tension reel, in a specific embodiment, the piston rod 14 with cylinder body 8 is equipped with first sealing member 9, second sealing member 12 and guide strip 11 for preventing the hydraulic oil leakage in the right chamber 20, the first sealing member 9 is fixed by end cap 10.

[0030] The utility model discloses a kind of expansion and contraction devices suitable for small tension reel, in a specific embodiment, the cylinder body 8 is formed with the process hole of drilling formation, the process hole is equipped with the plug 16 for plugging to prevent leakage.

[0031] The utility model discloses a kind of expansion and contraction devices suitable for small tension reel, in a specific embodiment, the inner hole of the second cylinder cover 15 is equipped with dustproof sealing member 13 for preventing dust from entering damage seal.

[0032] In order to facilitate the above-mentioned technical scheme of the utility model to understand, the above-mentioned technical scheme of the utility model is explained in detail by specific use mode as follows.

[0033] The utility model discloses a kind of expansion and contraction devices suitable for small tension reel, including swivel joint 1, O-ring 2, screw 3, first cylinder cover 4, bolt 5, spring 6, spring cover 7, cylinder body 8, first sealing element 9, end cover 10, guide strip 11, second sealing element 12, dustproof sealing element 13, piston rod 14, second cylinder cover 15, block 16, oil circuit 17, oil pipe 18, left chamber 19, right chamber 20.

[0034] In specific use, the utility model discloses a kind of expansion and contraction devices suitable for small tension reel, power is provided for reel, the expansion and contraction of reel are realized.When hydraulic oil enters right chamber 20 by oil circuit 17, hydraulic oil is under the action of oil pump pressure, piston rod 14 is pushed to move left, spring 6 is compressed, and reel is expanded under the action of piston rod 14;Conversely, when reel needs to contract, hydraulic oil in right chamber 20 is relieved, spring 6 drives piston rod 14 to move right, and hydraulic oil in right chamber 20 flows out by oil circuit 17, and reel is reduced under the action of piston rod 14;Because the force of spring 6 is limited, therefore the utility model is suitable for small tension reel.

[0035] As a result, the utility model is suitable for small tension reel, and the expansion and contraction device changes double-oil-way structure into single-oil-way, uses spring structure to replace hydraulic pressure in another direction, to reduce manufacturing cost and oil-way leakage probability.

[0036] The above only is the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement etc. in the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A tensioning device suitable for low-tension drums, characterized in that, The utility model provides a kind of hydraulic cylinder, including cylinder (8), the left and right sides of the cylinder (8) are equipped with first cylinder cover (4) and second cylinder cover (15) respectively, the left side of the first cylinder cover (4) is connected with rotary joint (1), spring (6) and piston rod (14) are equipped in the cylinder (8), the left and right ends of the spring (6) are equipped with spring cover (7), the right end surface of the spring cover (7) on right side is abutted with piston rod (14), the piston rod (14) divides the inner cavity of the cylinder (8) into left chamber (19) and right chamber (20), under the action of hydraulic oil and oil pump, the spring (6) and spring cover (7) are driven to make left compression or right expansion movement by the piston rod (14), and then linkage reel expands or shrinks.

2. A take-up device for a small tension reel according to claim 1, characterized in that The rotary joint (1) is connected with the first cylinder cover (4) by a plurality of screws (3); the rotary joint (1) is connected with the oil pipe (18) for providing hydraulic oil.

3. A retractor for small tension spools according to claim 2, characterized in that The rotary joint (1) and the first cylinder cover (4) are equipped with oil delivery holes communicating with each other, and the rotary joint (1) and the oil delivery hole connecting portion of the first cylinder cover (4) are equipped with O-rings (2) for preventing leakage.

4. A take-up device for a small tension reel according to claim 1, characterized in that The first cylinder cover (4) and the cylinder (8) are connected by a plurality of bolts (5), and the second cylinder cover (15) is connected with the right side end of the cylinder (8).

5. A take-up device for a small tension reel according to claim 1, wherein The rotary joint (1), the first cylinder cover (4) and the cylinder (8) are drilled and communicated to form an oil passage (17), and the oil passage (17) is used to provide the right chamber (20) with hydraulic oil under pressure.

6. A take-up device for a small tension reel according to claim 5, characterized in that The spring (6) and the left spring cover (7) are positioned and arranged by the first cylinder cover (4), and the right end of the spring (6) and the right spring cover (7) abuts against the piston rod (14).

7. A retractor according to claim 1, adapted for use with small tension spools, characterized in that, The piston rod (14) and the cylinder (8) are equipped with first and second sealing members (9) and (12) and guide strips (11) for preventing hydraulic oil in the right chamber (20) from leaking, and the first sealing member (9) is fixed by an end cover (10).

8. A retractor according to claim 1, adapted for use with small tension spools, characterized in that, The cylinder (8) is formed with a process hole drilled therein, and the process hole is equipped with a plug (16) for plugging and preventing leakage.

9. A retractor according to claim 1, adapted for use with small tension spools, characterized in that, The inner hole of the second cylinder cover (15) is equipped with a dust seal (13) for preventing dust from entering and damaging the seal.

Images