Rope overload protection device and winch

Abstract

The present application relates to winch safety protection technical field, provide a kind of rope overload protection device, including induction wheel;Shaft, the axial through-hole of induction wheel is passed in;Insulating elastic sleeve, the insulating elastic sleeve is sleeved between the induction wheel and the shaft, to support the gap between the induction wheel and the shaft, and the gap corresponds to the pressure position of the induction wheel, the pressure position of the induction wheel is adapted to abut rope;Conductive part, for respectively with the induction wheel and the shaft electric connection;A pair of support plate, the both ends of the shaft are rotatably connected between a pair of support plate;In the pressure position of the induction wheel is pressed by rope and makes the inner surface of the induction wheel contact with the shaft, the conductive part is conducted and exports electric signal, realizes the pressure rope effect to rope, avoids that rope is too slack, while in the overload of rope, timely close the load work of rope, simple structure, low cost.

Description

Technical Field

[0001] This invention relates to the field of winch safety protection technology, specifically to a winch and a winch overload protection device. Background Technology

[0002] A winch is a small, lightweight lifting device that uses a drum to wind a steel wire rope or chain to lift or pull heavy objects. Winches can lift vertically, pull horizontally or at an angle, and are components of machinery used in hoisting, road construction, and mine hoisting. They are widely used due to their simple operation, large rope capacity, and ease of relocation.

[0003] Different winch models have different traction limits. When the preset traction limit is exceeded, the winch rope will fatigue and break. The current method to avoid traction overload is to use a load cell to weigh the towed goods to determine whether the limit has been exceeded. However, external load cells are expensive and not suitable for small winches. In addition, other external resistance may occur during the winch's traction process, which the load cell cannot measure in time, causing the winch rope to overload. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problems of high cost and untimely measurement of the weighing sensor in the prior art, thereby providing a winch and a rope overload protection device, which uses the positional relationship between the sensing wheel and the shaft to apply tension to the rope to drive the switch of the winch by sending an electrical signal, thereby reducing the cost of the equipment.

[0005] This invention provides a rope overload protection device, comprising: a sensing wheel; a shaft passing through an axial through hole in the sensing wheel; an insulating elastic sleeve fitted between the sensing wheel and the shaft to support a gap between the sensing wheel and the shaft, the gap corresponding to a pressure position of the sensing wheel, the pressure position of the sensing wheel being suitable for abutting the rope; a conductive part for electrically connecting to the sensing wheel and the shaft respectively; and a pair of support plates, the two ends of the shaft being rotatably connected between the pair of support plates; when the sensing wheel is pressed by the rope at the pressure position, causing the inner surface of the sensing wheel to contact the shaft, the conductive part conducts electricity and outputs an electrical signal.

[0006] According to the present invention, a rope overload protection device further includes: a guide wheel assembly, the guide wheel assembly being rotatably connected to the support plate and disposed opposite to the sensing wheel, wherein the surfaces of the guide wheel assembly and the surface of the sensing wheel together define the guiding path of the rope.

[0007] According to the present invention, a rope overload protection device includes a guide wheel assembly comprising a first guide wheel and a second guide wheel, wherein the first guide wheel and the second guide wheel are respectively disposed on both sides of the axis of the sensing wheel.

[0008] According to the present invention, an overload protection device for a twisted rope is provided, wherein the insulating elastic sleeve is installed in the axial through hole of the sensing wheel, and the inner diameter of the insulating elastic sleeve is smaller than the inner diameter of the sensing wheel, and the difference between the inner diameters of the insulating elastic sleeve and the sensing wheel forms the gap.

[0009] According to the present invention, a rope overload protection device is provided, wherein two insulating elastic sleeves are provided, which are respectively located inside the two ends of the sensing wheel.

[0010] According to the present invention, the overload protection device for a twisted rope is wherein the insulating elastic sleeve is a rubber bushing.

[0011] According to the present invention, a rope overload protection device is provided, wherein the conductive part includes: a wire spring abutting against the outer surface of the induction wheel; and a terminal block connected to the shaft.

[0012] According to the present invention, a rope overload protection device further includes: a bearing, a mounting hole is provided on the support plate, the shaft and the guide wheel assembly pass through the mounting hole, and the bearing is provided between the shaft and the guide wheel assembly and the mounting hole.

[0013] According to the present invention, a rope overload protection device further includes: a response switch connected to the conductive part, wherein the electrical signal controls the response switch to close, thereby stopping the rope from working.

[0014] In an embodiment of the present invention, a winch is also provided, comprising: a rope overload protection device; a frame, wherein the support plate is hinged to the frame; a winch reel for winding the rope, wherein the rope overload protection device is located at the rope outlet of the winch reel; and an elastic element, one end of which is connected to the support plate and the other end of which is connected to the frame.

[0015] The technical solution of the present invention has at least the following advantages:

[0016] This invention provides a rope overload protection device, in which a shaft passes through a sensing wheel, and an insulating elastic sleeve is located between the shaft and the sensing wheel. When the rope is not overloaded, the insulating elastic sleeve supports the shaft and the sensing wheel, creating a gap between them and preventing contact. When the rope is overloaded, the rope presses against the sensing wheel, which in turn presses against the insulating elastic sleeve, causing the shaft and the sensing wheel to come into contact. Both the shaft and the sensing wheel become energized, and when they come into contact, the circuit is connected, sending an electrical signal outward, which is equivalent to transmitting an overload signal. The entire device has a simple structure and low cost, and can be directly installed on a small winch. It directly senses the tension on the rope and outputs the result quickly and accurately, avoiding environmental errors caused by indirect measurement of object weight. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 A structural diagram of a winch provided by the present invention;

[0019] Figure 2 for Figure 1 Cross-sectional view at point AA.

[0020] Figure label:

[0021] 1. Induction wheel; 2. Shaft; 3. Insulating elastic sleeve; 41. Wiring spring; 42. Terminal post; 5. Support plate; 61. First guide wheel; 62. Second guide wheel; 7. Bearing; 8. Frame; 9. Winch wheel; 10. Elastic element; 11. Winding rope; 12. Pressurized position. Detailed Implementation

[0022] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] The following is combined with Figures 1 to 2 The present invention describes a rope overload protection device, which includes a sensing wheel 1, a shaft 2, an insulating elastic sleeve 3, a conductive part and a pair of support plates 5. Overload of the rope 11 will cause damage to the rope 11. By detecting the load condition of the rope 11, the load operation of the rope 11 can be stopped in time when the load of the rope 11 is too large.

[0027] In some embodiments, the shaft 2 passes through the axial through hole of the sensing wheel 1, and the insulating elastic sleeve 3 is sleeved between the sensing wheel 1 and the shaft 2 to support the gap between the sensing wheel 1 and the shaft 2. The gap corresponds to the sensing wheel 1 and the pressure position 12. The pressure position 12 of the sensing wheel 1 is suitable for abutting the twisted rope 11. The conductive part is electrically connected to the sensing wheel 1 and the shaft 2 respectively.

[0028] The sensing wheel 1 is used to sense the tension of the twisted rope 11. The sensing wheel 1 is a cylindrical structure. The twisted rope 11 rotates around the circumference of the sensing wheel 1 at a certain angle, which is the angle at which the twisted rope 11 changes direction under the action of the sensing wheel 1. The sensing wheel 1 is located inside the angle formed by the two sides of the twisted rope 11. When there is a force at both ends of the twisted rope 11, the force will be applied to the surface of the sensing wheel 1 that is in contact with it. When the force at both ends of the twisted rope 11 increases, the force applied to the surface of the sensing wheel 1 by the twisted rope 11 will also increase. When the force at both ends of the twisted rope 11 decreases, the force applied to the surface of the sensing wheel 1 by the twisted rope 11 will decrease.

[0029] The shaft 2 passes through the induction wheel 1 and is located inside the induction wheel 1. There is an insulating elastic sleeve 3 between the shaft 2 and the induction wheel 1. At the same time, the shaft 2 and the induction wheel 1 are electrically connected. The insulating elastic sleeve 3 plays a supporting role. Due to its elasticity, the height of the insulating elastic sleeve 3 can be adjusted according to the externally applied force. A portion of the insulating elastic sleeve 3 is located between the shaft 2 and the induction wheel 1, and the other portion forms a gap under the support of the insulating elastic sleeve 3. The twisted rope 11 abuts against the outer surface of the induction wheel 1. The position where the twisted rope 11 abuts is the position where the induction wheel 1 is pressed. The position where the induction wheel 1 is pressed corresponds to the gap.

[0030] At the pressure position 12 of the sensing wheel 1, the rope 11 presses down, causing the inner surface of the sensing wheel 1 to contact the shaft 2, and the conductive part conducts electricity and transmits electrical signals.

[0031] When the force on the twisted rope 11 is within the preset range, the force applied by the twisted rope 11 to the sensing wheel 1 is insufficient to compress the insulating elastic sleeve 3, or the compressed length is very small. The insulating elastic sleeve 3 supports the sensing wheel 1 and the shaft 2 at both ends, so that there is still a certain gap between the sensing wheel 1 and the shaft 2. The circuit of the sensing wheel 1 and the circuit support of the shaft 2 are in an open circuit state, and no electrical signal can be sent. When the force on the twisted rope 11 exceeds the preset range, the force applied by the twisted rope 11 to the sensing wheel 1 increases, the compressed length of the insulating elastic sleeve 3 increases, and the length of the insulating elastic sleeve 3 is insufficient to support the sensing wheel 1 and the shaft 2. The sensing wheel 1 and the shaft 2 come into contact, and the circuit of the sensing wheel 1 and the circuit of the shaft 2 are connected to form a complete electrical path, so as to transmit the electrical signal.

[0032] The two ends of the shaft 2 are rotatably connected between a pair of support plates 5.

[0033] A pair of support plates 5 serve as support components for the shaft 2 and the sensing wheel 1. The two support plates 5 are located at the two ends of the shaft 2, allowing the sensing wheel 1 and the shaft 2 to be installed in a preset manner. They can withstand the tension of the twisted rope 11 and ensure the structural stability of the twisted rope overload protection device.

[0034] In one embodiment, the rope overload protection device further includes a guide wheel assembly, which is rotatably connected to the support plate 5 and disposed opposite to the sensing wheel 1. The surface of the guide wheel assembly and the surface of the sensing wheel 1 together define the guiding path of the rope 11.

[0035] The rotating wheel assembly is mounted on the support plate 5. The support plate 5 supports the rotating wheel assembly so that its axis is parallel to the axis of the induction wheel 1 and the shaft 2. The direction of the twisted rope 11 cannot directly contact the induction wheel 1, thus exerting force on the induction wheel 1. Therefore, it is necessary to install a guide wheel assembly and the induction wheel 1 to jointly define the guiding space of the twisted rope 11, so that the twisted rope 11 can circumferentially rotate around the surface of the guide wheel at a certain angle. The angle of rotation is the angle at which the twisted rope 11 needs to change direction. While changing the extension direction of the twisted rope 11, the guide wheel assembly exerts less stress on the twisted rope 11, thus avoiding damage to the twisted rope 11.

[0036] In some embodiments, the guide wheel includes a first guide wheel 61 and a second guide wheel 62, the axes of the first guide wheel 61 and the second guide wheel 62 being parallel to the axis of the sensing wheel 1 and respectively disposed on both sides of the axis of the sensing wheel 1.

[0037] The first guide wheel 61 and the second guide wheel 62 are respectively disposed on both sides of the induction wheel 1, which can guide the direction of the winch 11 passing through the induction wheel 1. The first guide wheel 61 guides the direction of the winch 11 on the side where the winch 11 comes from, and the second guide wheel 62 guides the direction of the winch 11 on the side where the winch 11 goes, ensuring that the winch 11 can be pressed tightly against the surface of the induction wheel 1. The first guide wheel 61 is disposed at the direction where the winch 11 comes from, so that after the winch 11 contacts the first guide wheel 61, it extends along the surface of the first guide wheel 61 to the space between the first guide wheel 61 and the induction wheel 1. The upper and lower edges of the first guide wheel 61 and the induction wheel 1 are misaligned, so that the winch 11 contacts the surface of the induction wheel 1 after passing through, and then extends from the surface of the induction wheel 1 to the space between the induction wheel 1 and the second guide wheel 62, until it extends to the surface of the second guide wheel 62, and from the second guide wheel 62 it extends into the winch.

[0038] By utilizing the positional and guiding relationship between the induction wheel 1, the first guide wheel 61, and the second guide wheel 62, the winch rope 11 at the winch outlet is pressed, keeping the winch rope 11 in a taut state. This avoids the problem of the winch rope 11 becoming tangled and messy inside the winch, while ensuring that the winch rope 11 is pressed tightly against the surface of the induction wheel 1, so that the induction wheel 1 can promptly sense the tension change of the winch rope 11.

[0039] In some embodiments, the insulating elastic sleeve 3 is installed in the axial through hole of the sensing wheel 1, and the inner diameter of the insulating elastic sleeve 3 is smaller than the inner diameter of the sensing wheel 1, forming a gap between the insulating elastic sleeve 3 and the inner diameter of the sensing wheel 1.

[0040] The insulating elastic sleeve 3 has a hollow internal structure for inserting the shaft 2. A countersunk hole is provided on its inner surface at the position where the insulating elastic sleeve 3 is installed. The insulating elastic sleeve 3 is accommodated in the countersunk hole. The inner diameter of the countersunk hole is larger than the inner diameter of the axial through hole. The insulating elastic sleeve 3 protrudes from the countersunk hole in one state and is flush with the countersunk hole in another state. The edges of the countersunk hole and the axial through hole can limit the insulating elastic sleeve 3 in the radial direction to ensure the stability of the installation.

[0041] When the force applied to the insulating elastic sleeve 3 does not exceed the preset range, its inner diameter is smaller than that of the sensing wheel 1. Therefore, the inner surface of the insulating elastic sleeve 3 is higher than that of the sensing wheel 1. The inner surface of the insulating elastic sleeve 3 supports the shaft 2, and the difference in their inner diameters forms a gap.

[0042] In some embodiments, two insulating elastic sleeves 3 are provided, located inside the two ends of the sensing wheel 1 respectively.

[0043] When the force application position of the winch 11 and the insulating elastic sleeve 3 are unbalanced, the induction wheel 1 will be pressed to one side, which will lead to inaccurate test results of the induction tension. Therefore, by setting two symmetrical insulating elastic sleeves 3 to balance and support the induction wheel 1, the induction results are ensured to be accurate and the winch operation is stable.

[0044] In some embodiments, the insulating elastic sleeve 3 is a rubber bushing, which is simple to install and inexpensive.

[0045] In some embodiments, the conductive part includes a wire spring 41 and a terminal 42, with the wire spring 41 abutting against the outer surface of the sensing wheel 1 and the terminal 42 connected to the shaft 2.

[0046] The system wire is at one end of the connecting spring 41, and the other end of the connecting spring 41 is a spring. Because the sensing wheel 1 will move during the sensing tension process, it is connected to the sensing wheel 1 through the spring. The spring will move with the movement of the sensing wheel 1 and is always in the process of connection. One end of the shaft 2 passes through the support plate 5 and faces outward. The terminal 42 is connected to one end of the shaft 2 and conducts electricity to the shaft 2.

[0047] In some embodiments, the rope overload protection device further includes a bearing 7, a mounting hole is provided on the support plate 5, the shaft 2 and the guide wheel assembly pass through the mounting hole, and the mounting hole is provided with a bearing 7 between the shaft 2 and the guide wheel assembly respectively.

[0048] The bearing 7 allows the shaft 2 and the guide wheel assembly to rotate while passing through the support plate 5. Through the cooperation of the mounting hole and the bearing 7, the shaft 2 and the guide wheel assembly are rotatably connected to the support plate 5.

[0049] In some embodiments, the rope overload protection device further includes a response switch connected to a conductive part, and an electrical signal controls the corresponding switch to close, causing the rope 11 to stop working.

[0050] When the tension of the winch 11 is too high, the induction wheel 1 and the shaft 2 come into contact and conduct electricity. The circuit of the conductive part is connected and sends an electrical signal. The electrical signal causes the response switch to close, the winch stops rotating, and the winch 11 stops pulling, thus avoiding operation under overload conditions.

[0051] In some embodiments, a winch is also provided, which includes a rope overload protection device, a frame 8, a winch reel 9, and an elastic element 10.

[0052] The winch 9 is mounted on the frame 8. The winch 9 is used to wind the rope 11. The rope overload protection device is located at the outlet of the rope 11 in the winch 9. The rope 11 must pass through the rope overload protection device when entering and exiting the winch 9. After being pressed by the rope overload protection device, it enters the winch 9 to ensure that the rope 11 is wound in an orderly manner in the winch.

[0053] The support plate 5 is hinged to the frame 8. One end of the elastic element 10 is connected to the support plate 5, and the other end of the elastic element 10 is connected to the frame 8. The overload protection device for the winch rope is elastically connected to the frame 8. When the force on the winch rope 11 changes or according to the different extension directions of the winch rope 11, its stable position changes to a certain extent. At the same time, the elastic element 10 can make it tightly installed on the frame 8.

[0054] In some embodiments, the overload protection of the winch 11 is as follows: First, the winch overload protection device is installed on the winch by means of hinged frame 8 via support plate 5 and elastic element 10 connecting frame 8. The winch 11 on the winch passes between the second guide wheel 61 and the induction wheel 1, and then passes between the first guide wheel 61 and the induction wheel 1. The other free end of the winch 11 is connected to the object being pulled. When traction begins, the induction wheel 1 and the guide wheel assembly press the winch 11, causing the winch 11 to be tautly pressed against the induction wheel 1. The winch 11 applies force to the surface of the induction wheel 1, and the induction wheel 1 applies force to the insulating elastic sleeve 3 inside. When the winch 11 is not overloaded, the force applied by the winch 11 to the induction wheel 1 and the insulating elastic sleeve 3 is insufficient to overload the object. When the height of the insulating elastic sleeve 3 is too low, the insulating elastic sleeve 3 supports the induction wheel 1, creating a gap between the induction wheel 1 and the shaft 2. When the winch 11 is overloaded, the force exerted by the winch 11 on the induction wheel 1 and the insulating elastic sleeve 3 is large enough to compress the insulating elastic sleeve 3. The inner diameter of the insulating elastic sleeve 3 is larger than the inner diameter of the induction wheel 1, and the insulating elastic sleeve 3 is insufficient to support the induction wheel 1. The inner surface of the induction wheel 1 comes into contact with the shaft 2. Both the induction wheel 1 and the shaft 2 are charged. After they come into contact, a current path is formed. The current path also has a response switch. The current path transmits an electrical signal to the response switch. When the response switch closes, the winch stops working, and the winch 11 stops pulling the overloaded load, thus realizing the overload protection of the winch 11.

[0055] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A rope overload protection device, characterized in that, include: Induction wheel (1); Shaft (2) passes through the axial through hole of the induction wheel (1); An insulating elastic sleeve (3) is fitted between the sensing wheel (1) and the shaft (2) to support a gap between the sensing wheel (1) and the shaft (2), and the gap corresponds to the pressure position (12) of the sensing wheel (1), which is suitable for abutting the twisted rope (11). The conductive part is used to electrically connect to the induction wheel (1) and the shaft (2) respectively; A pair of support plates (5), with the two ends of the shaft (2) rotatably connected between the pair of support plates (5); When the sensing wheel (1) is pressed by the rope (11) at the pressure position (12), the inner surface of the sensing wheel (1) comes into contact with the shaft (2), and the conductive part conducts electricity and outputs an electrical signal. The insulating elastic sleeve (3) is installed in the axial through hole of the sensing wheel (1), and the inner diameter of the insulating elastic sleeve (3) is smaller than the inner diameter of the sensing wheel (1). The difference between the inner diameter of the insulating elastic sleeve (3) and the inner diameter of the sensing wheel (1) forms the gap.

2. The rope overload protection device according to claim 1, characterized in that, Also includes: The guide wheel assembly is rotatably connected to the support plate (5) and is disposed opposite to the sensing wheel (1). The surface of the guide wheel assembly and the surface of the sensing wheel (1) together define the guiding path of the twisted rope (11).

3. The rope overload protection device according to claim 2, characterized in that, The guide wheel assembly includes: The first guide wheel (61) and the second guide wheel (62) are parallel to the axis of the sensing wheel (1) and are respectively located on both sides of the axis of the sensing wheel (1).

4. The rope overload protection device according to claim 1, characterized in that, Two insulating elastic sleeves (3) are provided, located at the two ends of the sensing wheel (1).

5. The rope overload protection device according to claim 1, characterized in that, The insulating elastic sleeve (3) is a rubber bushing.

6. The rope overload protection device according to claim 1, characterized in that, The conductive part includes: A wire spring (41) abuts against the outer surface of the induction wheel (1); Terminal (42) is connected to the shaft (2).

7. The rope overload protection device according to claim 2, characterized in that, Also includes: The bearing (7) has a mounting hole on the support plate (5), the shaft (2) and the guide wheel assembly pass through the mounting hole, and the bearing (7) is provided between the shaft (2) and the guide wheel assembly and the mounting hole.

8. The rope overload protection device according to claim 1, characterized in that, Also includes: A response switch is connected to the conductive part, and the electrical signal controls the response switch to close so that the twisted rope (11) stops working.

9. A winch, characterized in that, include: The rope overload protection device as described in any one of claims 1-8; The frame (8) is to which the support plate (5) is hinged; A winch (9) is used to wind a rope (11), and the rope overload protection device is located at the outlet of the rope (11) in the winch (9). An elastic element (10) is provided, one end of which is connected to the support plate (5), and the other end of which is connected to the frame (8).

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