Over-winding protection device for variable-diameter cable

Abstract

An over-winding protection device for a variable-diameter cable comprises a frame, two pairs of sliding grooves are formed in the frame, a support is arranged between each pair of sliding grooves, guide pins fixedly connected to the upper end and the lower end of the support are assembled in the sliding grooves, a roller is installed in the support, a limiting fork is connected to the frame on one side of each pair of sliding grooves, and the support is located in the limiting fork. And the limiting fork is connected with the bracket through a pre-breaking safety pin. The cable winding device is used for solving the problem that a cable in a large-diameter section is extruded and damaged due to over-winding of the cable under the condition that an opening and closing roller is not adjusted.

Description

Technical Field

[0001] This utility model relates to an overload protection device for a variable diameter cable. Background Technology

[0002] Variable diameter cables refer to cables with inconsistent diameters along their length, featuring a transition section where the diameter gradually increases during retrieval. This section passes through a winch cable guide device, which reciprocates to neatly arrange the cable onto the drum. When the transition section passes the winch cable guide device, the opening and closing drums must be manually adjusted to prevent the larger diameter cable from failing to pass through. However, in actual operation, it is unavoidable that the cable may over-retrieve if the opening and closing drums are not adjusted, causing damage to the larger diameter section due to compression. Utility Model Content

[0003] The purpose of this invention is to provide an over-protection device for variable diameter cables, which solves the problem of cable over-contraction and subsequent compression damage to the large-diameter section of the cable when the opening and closing drum is not adjusted.

[0004] To solve the above problems, the technical solution of this utility model is as follows:

[0005] An overload protection device for a variable diameter cable includes a frame with two pairs of grooves inside the frame and a bracket between each pair of grooves. Guide pins fixedly connected to the upper and lower ends of the bracket are assembled in the grooves. A roller is installed inside the bracket. A limit fork is connected to one side of the frame of each pair of grooves. The bracket is located inside the limit fork, and the limit fork is connected to the bracket through a pre-break safety pin.

[0006] The limiting fork is connected to the frame through an adjustment mechanism. The adjustment mechanism includes a screw installed on the frame. One end of the screw is a fixed connection handle, and the other end is provided with a pin. The limiting fork has a pin hole, and the pin is inserted into the pin hole.

[0007] A connecting pin connects the latch and the limit fork.

[0008] The adjustment mechanism also includes a limiting screw, which is mounted on the frame and has one end abutting against the screw rod.

[0009] The beneficial effects of this utility model are as follows: a pre-cut safety pin is provided on one side of the roller. When the roller is over-retracted without adjusting the opening and closing rollers, the pre-cut safety pin is cut off to widen the gap of the roller assembly to protect the cable and avoid cable damage in case of misoperation. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings:

[0011] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0012] Figure 2 This is a partial three-dimensional structural diagram of the present invention.

[0013] Figure 3 This is a partial cross-sectional structural diagram of the present invention.

[0014] In the diagram: Frame 1, Handle 2, Limiting screw 3, Screw 4, Roller 5, Pre-cut safety pin 6, Limiting fork 7, Connecting pin 8, Bracket 9, Guide pin 10, Slide groove 11, Variable diameter cable 12. Detailed Implementation

[0015] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figure 1 and 2 As shown, an over-protection device for a variable diameter cable includes a square frame 1, with two pairs of sliding grooves 11 inside the frame 1. A U-shaped bracket 9 is provided between each pair of sliding grooves 11. Guide pins 10, which are fixedly connected to the upper and lower ends of the bracket 9, are assembled inside the sliding grooves 11. Rollers 5 are installed inside the bracket 9, with the two rollers 5 arranged in parallel and spaced apart. A limit fork 7 is connected to one side of the frame 1 on each pair of sliding grooves 11. The bracket 9 is located inside the limit fork 7, and there is a gap between the limit fork 7 and the bracket 9. The limit fork 7 is connected to the bracket 9 through a pre-break safety pin 6.

[0017] The working principle of this utility model is as follows: Figure 3 As shown, the variable diameter cable 12 moves from right to left in the retraction direction. Figure 3 The middle roller 5 is in an unadjusted position. After the small-diameter section of the cable passes through roller 5, it gradually transitions to the large-diameter section. The conical structure of the transition section pushes the two rollers 5 to the sides. The cross-section of the mating section of the pre-break safety pin 6 inside the roller 5 is sheared. When the shear stress exceeds the strength limit of the material used for the pre-break safety pin 6, the safety pin shears off, and the roller 5 can continue to move to both sides along the slide groove 11 to widen the gap, thus avoiding damage to the cable.

[0018] The limiting fork 7 is connected to the frame 1 via an adjustment mechanism. The adjustment mechanism includes a screw 4 mounted on the frame 1. One end of the screw 4 is fixedly connected to the handle 2, and the other end is provided with a pin. The limiting fork 7 has a pin hole, and the pin is inserted into the pin hole. The position of the roller 5 is adjusted by rotating the handle 2 to adjust the gap between the two rollers 5, so that the protection device can be adapted to cables of different specifications.

[0019] A connecting pin 8 connects the pin and the limiting fork 7. The connecting pin 8 is used to fix the pin at one end of the screw 4 and prevent the pin from separating from the limiting fork 7.

[0020] The adjustment mechanism also includes a limiting screw 3, which is mounted on the frame 1, with one end of the limiting screw 3 abutting against the screw rod 4. The limiting screw 3 is used to axially fix the screw rod 4, preventing the screw rod 4 from moving axially due to vibration.

[0021] The embodiments described in this specification are merely examples of implementations of the inventive concept. The scope of protection of this utility model should not be considered as limited to the specific forms described in the embodiments. The scope of protection of this utility model also extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.

Claims

1. An overload protection device for a variable diameter cable, characterized in that: Includes a frame (1), which has two pairs of sliding grooves (11) and a bracket (9) between each pair of sliding grooves (11). Guide pins (10) fixedly connected to the upper and lower ends of the bracket (9) are assembled in the sliding grooves (11). A roller (5) is installed in the bracket (9). A limit fork (7) is connected to one side of the frame (1) of each pair of sliding grooves (11). The bracket (9) is located in the limit fork (7). The limit fork (7) is connected to the bracket (9) through a pre-break safety pin (6).

2. The overload protection device for a variable diameter cable according to claim 1, characterized in that: The limiting fork (7) is connected to the frame (1) through an adjustment mechanism. The adjustment mechanism includes a screw (4) installed on the frame (1). One end of the screw (4) is a fixed connection handle (2), and the other end is provided with a pin. The limiting fork (7) has a pin hole, and the pin is inserted into the pin hole.

3. The overload protection device for a variable diameter cable according to claim 2, characterized in that: A connecting pin (8) connects the pin and the limiting fork (7).

4. An overload protection device for a variable diameter cable according to claim 2 or 3, characterized in that: The adjustment mechanism also includes a limiting screw (3), which is mounted on the frame (1) and one end of the limiting screw (3) abuts against the screw rod (4).

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