Steel cable self-tensioning guide pulley

Abstract

The utility model relates to a steel cable self-tensioning guide pulley which comprises a support, a pulley body, a damping wheel, a balance weight, an eccentric shaft, a proximity switch, a limiting bolt, a proximity switch mounting plate, a spring, a swing arm and a damping shaft. The eccentric shaft is installed on the support, the pulley is installed in the middle of the eccentric shaft, the swing arms are fixed to the two ends of the eccentric shaft respectively, the damping shaft is installed at one ends of the two swing arms, the balance weight is installed at the other ends of the two swing arms, the damping wheel is installed in the middle of the damping shaft, and the proximity switch installation plate is installed above the support. The two springs are located on the two sides of the damping wheel respectively and installed on the damping shaft. And the flexible steel cable automatically tightens the steel cable through the self-tensioning guide pulley, so that the manpower is saved, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a winch with a flexible steel cable in the winch field, in particular to a steel cable self-tensioning guide pulley. Background Art

[0002] Winches using flexible cables are widely used in many different industries. These winches consist of a rotating drum that winds the cable onto the drum (collecting) and unwinds it (paying out). To maximize the cable's capacity and prevent the cable from unraveling from the drum's edge, the cable must be neatly stored on the drum. If the cable is loosely wound around the drum and subjected to heavy loads, the upper cable can press into the lower cable, causing it to bend and kink within the loops, resulting in a tangled cable. This damages the cable, requiring removal in severe cases. To prevent this, unloaded winches traditionally rely on manual cable tensioning.

[0003] When using a winch with a flexible steel cable to reel in the cable, the operator must coordinate with another cable puller. While reeling in the cable, the cable puller must continuously tighten the cable to provide tension and ensure that the cable is neatly arranged on the winch. If the cable puller fails to tighten the cable or the tension is insufficient, the cable can easily become loose, leading to tangled cables and tangles, shortening the cable's service life.

[0004] In view of the above-mentioned defects in the existing technology, the inventor has finally created the present utility model which has real practical value after continuous research, design, repeated trials and improvements. Summary of the Invention

[0005] The purpose of this utility model is to overcome the defects of the existing flexible steel cable winch and provide a steel cable self-tensioning guide pulley with a new structure. The technical problem to be solved is to prevent the rope loop from bending or knotting, and to prevent cable tangling, thereby extending the service life of the steel cable and making it more suitable for practical use.

[0006] Another object of the present invention is to provide a self-tensioning guide pulley for a steel cable. The technical problem to be solved is to enable the steel cable to pass through the self-tensioning guide pulley, thereby saving manpower, improving work efficiency, and being more suitable for practical use.

[0007] The idea of ​​the utility model is to automatically tighten the steel cable through the self-tensioning guide pulley, so that there is resistance to the winch's retraction, so that the steel cable wrapped around the winch is in a taut state, so that the winch can arrange the cable more closely and tightly, reducing the possibility of cable disorder during retraction, saving a worker and improving work efficiency.

[0008] The purpose of the present invention and the technical problem solved are achieved by adopting the following technical solutions. According to the present invention, a self-tensioning guide pulley for a steel cable comprises a bracket, a pulley, a damping wheel, a counterweight, an eccentric shaft, a proximity switch, a limit bolt, a proximity switch mounting plate, a spring, a swing arm and a damping shaft, wherein the eccentric shaft is mounted on the bracket, the pulley is mounted in the middle of the eccentric shaft, a swing arm is fixed to each end of the eccentric shaft, one end of the two swing arms is mounted with a damping shaft, the damping wheel is mounted in the middle of the damping shaft, the other end of the two swing arms is mounted with a counterweight and is located on the other side of the damping shaft, the proximity switch mounting plate is mounted above the bracket, the proximity switch is mounted on the proximity switch mounting plate, the limit bolts of the two limit swing arms are respectively mounted on the bracket, and the two springs are respectively located on both sides of the damping wheel and mounted on the damping shaft.

[0009] Furthermore, it also includes two friction plates, which are installed on the damping shaft and closely attached to the two side surfaces of the damping wheel, and the steel cable passes between the pulley and the damping wheel.

[0010] Compared with the prior art, the present invention has obvious advantages and beneficial effects. It has at least the following advantages:

[0011] The flexible steel cable is automatically tightened by the self-tensioning guide pulley, which saves manpower and improves work efficiency.

[0012] Reduce the probability of damage and replacement of the winch flexible steel cable and reduce the cost of equipment use.

[0013] A steel cable detection device has been added. When the self-tensioning guide pulley provides insufficient tension for the steel cable, the flexible steel cable becomes farther away from the proximity switch, and the equipment automatically stops the retracting / releasing operation, thereby improving the automation rate of the equipment.

[0014] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0016] Figure 2 It is a front view schematic diagram of the structure of the utility model.

[0017] Figure 3 This utility model Figure 2 AA section view (rotated 90° counterclockwise).

[0018] Figure 4 This utility model Figure 2 BB cross-section view (rotated 90° counterclockwise)

[0019] in:

[0020] 1: Bracket 2: Pulley

[0021] 3: Damping wheel 4: Counterweight

[0022] 5: Eccentric shaft 6: Proximity switch

[0023] 7: Limit bolt 8: Proximity switch mounting plate

[0024] 9: Spring 10: Swing arm

[0025] 11: Steel cable 12: Friction plate

[0026] 13: Damping shaft DETAILED DESCRIPTION

[0027] In order to further illustrate the technical means and effects adopted by the present invention to achieve the predetermined purpose of the invention, the following is a detailed description of the specific implementation method, structure, characteristics and effects of a steel cable self-tensioning guide pulley proposed in accordance with the present invention, in combination with the accompanying drawings and preferred embodiments.

[0028] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, a steel cable self-tensioning guide pulley of a preferred embodiment of the present invention mainly comprises:

[0029] It consists of bracket 1, pulley 2, damping wheel 3, counterweight 4, eccentric shaft 5, pendulum proximity switch 6, limit bolt 7, proximity switch mounting plate 8, spring 9, swing arm 10, steel cable 11, friction plate 12, damping shaft 13, etc. Figure 1 .

[0030] Bracket 1 is the main structure of the self-tensioning guide pulley, used to install the eccentric shaft 5 and the proximity switch mounting plate 8. The self-tensioning guide pulley is positioned and installed through the bracket 1;

[0031] The pulley 2 is installed in the middle of the eccentric shaft 5. The pulley 2 rotates around the eccentric shaft 5. The rotation center of the pulley 2 is the position II of the eccentric shaft 5. Figure 2 As shown;

[0032] The damping wheel 3 is installed in the middle of the damping shaft 13 and can rotate around the damping shaft 13. When the winch is retracted, the steel cable 11 passes between the damping wheel 3 and the pulley 2, and the movement of the steel cable 11 drives the damping wheel 3 to rotate around the damping shaft 13;

[0033] The counterweight 4 is mounted on two swing arms 10 and is located on the other side of the damping wheel 3. The counterweight 4 is relatively large. Due to the gravity of the counterweight 4, the swing arm 10 rotates clockwise around the eccentric shaft 5, so that the damping wheel 3 can always maintain contact with the steel cable 11. The rotation center of the swing arm 10 is at position I of the eccentric wheel 5. Figure 2 As shown;

[0034] The eccentric shaft 5 is mounted on the bracket 1. The eccentric shaft 5 is fixed relative to the bracket 1. The pulley 2 and the swing arm 10 can rotate freely around the eccentric shaft 5.

[0035] The proximity switch 6 is mounted on the proximity switch mounting plate 8. The proximity switch 6 can be axially adjusted to maintain a clear distance from the steel cable 10. When the steel cable 11 is taut, the proximity switch 6 activates. When the steel cable 11 shifts, the proximity switch 6 moves further away from the cable and stops activating.

[0036] Two limit bolts 7 are installed on the bracket 1 to limit the position of the swing arm 10;

[0037] The proximity switch mounting plate 8 is mounted on the bracket 1. The mounting position of the proximity switch mounting plate 8 can be fine-tuned to adjust the radial clearance between the proximity switch 6 and the steel cable.

[0038] The two springs 9 are respectively located on both sides of the damping wheel 3 and mounted on the damping shaft 13;

[0039] Two swing arms 10 are respectively installed at both ends of the eccentric shaft 5. The two swing arms 10 can rotate around the eccentric shaft 5. The rotation center of the swing arm 10 is position I of the eccentric shaft 5 (see Figure 2 shown);

[0040] The steel cable 11 passes between the pulley 2 and the damping wheel 3. The movement direction of the steel cable is as follows: Figure 2 As shown;

[0041] Two friction plates 12 are mounted on the damping shaft 13 and are in close contact with the two sides of the damping wheel;

[0042] The damping shaft 13 is mounted on one end of the two-piece swing arm 10. The swing arm 10 presses the spring 9 to make the friction plate 12 close to the damping wheel 3, thereby increasing the friction force when the damping wheel 3 rotates.

[0043] When the steel cable self-tensioning guide pulley of the present invention is performing a retracting action, the working principle of the steel cable 11 self-tensioning pulley is as follows:

[0044] Step 1: The winch performs a reeling action. Due to the friction between the steel cable 11 and the damping wheel 3, the upward movement of the steel cable 11 drives the damping wheel 3 to move upward;

[0045] Step 2: The damping wheel 3 is connected to the swing arm 10 through the damping shaft 13. The damping wheel 3 moves upward, causing the structure composed of the damping wheel 3, the counterweight 4, the spring 9, the swing arm 10 and the friction plate 12 to rotate clockwise around the point I of the eccentric shaft 5 (see attached Figure 2 ).

[0046] Step 3: Due to the structural characteristics of the eccentric shaft 5, the pulley 2 rotates around point II of the eccentric shaft 5, while the damping wheel 3 rotates around point I of the eccentric shaft 5 via the swing arm 10. When the swing arm 10 rotates to the horizontal position, the distance between the pulley 2 and the damping wheel 3 is minimized, and the friction generated between the damping wheel 3 and the steel cable 11 is maximized. In actual use, the minimum distance between the damping wheel 3 and the steel cable 11 during the rotation of the swing arm 10 is adjusted by adjusting the length of the limit bolt 7 to ensure that the friction between the damping wheel 3 and the steel cable 11 can drive the damping wheel 3 to rotate around the damping shaft 13 during the movement of the steel cable 11.

[0047] Step 4: Due to the action of the friction plate 12, the rotation of the damping wheel 3 will be resisted. The size of the resistance when the damping wheel 3 rotates can be changed by adjusting the gap between the two swing arms 10 and the compression of the spring 9.

[0048] Step 5: The resistance encountered by the damping wheel 3 in its rotation eventually becomes the resistance to the upward movement of the steel cable 11 through the action of force. Due to the action of these resistances, when the winch performs the reeling operation, the steel cable 11 between the winch and the self-tensioning guide pulley will be tightened, thereby achieving a better reeling effect.

[0049] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A steel cable self-tensioning guide pulley, characterized in that: The invention comprises a bracket (1), a pulley (2), a damping wheel (3), a counterweight (4), an eccentric shaft (5), a proximity switch (6), a limit bolt (7), a proximity switch mounting plate (8), a spring (9), a swing arm (10) and a damping shaft (13), wherein the eccentric shaft (5) is mounted on the bracket (1), the pulley (2) is mounted on the middle of the eccentric shaft (5), a swing arm (10) is fixed to each of the two ends of the eccentric shaft (5), and a damping shaft (13) is mounted on one end of each of the two swing arms (10). The damping wheel (3) is installed in the middle of the damping shaft (13), the other ends of the two swing arms (10) are installed with a counterweight (4) and are located on the other side of the damping shaft (13), the proximity switch mounting plate (8) is installed above the bracket (1), the proximity switch (6) is installed on the proximity switch mounting plate (8), the limiting bolts (7) of the two limiting swing arms (10) are respectively installed on the bracket (1), and the two springs (9) are respectively located on both sides of the damping wheel (3) and installed on the damping shaft (13).

2. The steel cable self-tensioning guide pulley according to claim 1, characterized in that: The utility model also comprises two friction plates (12), which are mounted on the damping shaft (13) and closely attached to the two side surfaces of the damping wheel (3), and the steel cable (11) passes between the pulley (2) and the damping wheel (3).

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