Steel cable tensioning device for winch

Abstract

The invention relates to the technical field of winch equipment, in particular to a steel cable tensioning device for a winch, which comprises a winding drum transmission gear, a tensioning device transmission shaft, a tensioning device variable-speed shafting assembly, a tensioning wheel and a pressing wheel, the winding drum transmission gear is arranged at one end of the winch winding drum; a plurality of gears which are different in size and rotate synchronously are arranged on the tensioning device transmission shaft and are driven by the winding drum transmission gear at the same time; the tension device variable-speed shaft system assembly comprises a pinion friction disc and a bull gear friction disc which are respectively meshed with gears with different sizes on the tension device transmission shaft and are simultaneously driven by the tension device transmission shaft; the tensioning device variable-speed shaft system assembly is used for adjusting the linear speed of the tensioning wheel, so that the tensioning wheel and the pressing wheel continuously apply downward tensioning force to the steel cable. When the steel cable is wound and unwound, downward tensioning force can be continuously applied to the steel cable.

Description

TECHNICAL FIELD

[0001] The present application relates to the winch equipment technical field, and particularly relates to a steel cable tensioning device for a winch. BACKGROUND

[0002] In the process of winding and unwinding the winch cable, the friction and extrusion between the steel cables or the scratching between the steel cables and other parts will damage the steel cables, causing the steel cables to have abnormal states such as broken wires, diameter shrinkage, kinking, loose birdcage, wear and flattening. These damages will cause the steel cables to be stuck or even broken, affecting the normal use of the winch and even threatening the life safety of the user. Therefore, the steel cable is a vulnerable life part in the winch, and needs to be regularly inspected and replaced. If the steel cable is replaced too frequently, it will not only reduce the work efficiency but also increase the use cost.

[0003] In order to increase the service life of the winch steel cable, it is necessary to avoid scratching and extrusion of the steel cable as much as possible during the winding and unwinding process. The steel cable arrangement mechanism arranged in the winch can effectively improve the working state of the steel cable, so that the steel cable can be orderly wound out when unwinding and orderly wound in and arranged on the winding drum when winding. The premise for the stable use of the steel cable arrangement mechanism is that the steel cable is in a continuous straight state. Therefore, a steel cable tensioning device needs to be designed to ensure that a tensioning force, that is, a continuous downward pulling force, is continuously applied to the steel cable during the operation of the winch. SUMMARY

[0004] In order to solve the problems in the background art, the present application provides a steel cable tensioning device for a winch, which comprises a winding drum transmission gear, a tensioning device transmission shaft, a tensioning device variable speed shaft system assembly, a tensioning wheel and a pressing wheel. The winding drum transmission gear is arranged at one end of the winding drum of the winch. The tensioning device transmission shaft is provided with a plurality of gears of different sizes which rotate synchronously and are driven by the winding drum transmission gear. The tensioning device variable speed shaft system assembly comprises a pinion friction disc and a large gear friction disc, and is respectively engaged with the gears of different sizes on the tensioning device transmission shaft and driven by the tensioning device transmission shaft. The tensioning device variable speed shaft system assembly is used for adjusting the linear speed of the tensioning wheel, so that the tensioning wheel and the pressing wheel continuously apply a downward tensioning force to the steel cable.

[0005] Further, the tensioning device transmission shaft is provided with three gears of different sizes which rotate synchronously, and the winding drum transmission gear engages and drives the middle gear on the tensioning device transmission shaft.

[0006] Further, the pinion friction disc is engaged with the gears of larger sizes on both sides of the tensioning device transmission shaft, and the large gear friction disc is engaged with the gears of smaller sizes on both sides of the tensioning device transmission shaft.

[0007] Further, the end faces of the pinion friction disc and the gear friction disc are pasted with paper-based friction plates, and the inner holes are provided with closely fitted bearings.

[0008] Further, the tensioning device variable speed shafting assembly further comprises one-way bearings, which are respectively arranged inside the pinion friction disc and the gear friction disc.

[0009] Further, when the steel cable is lowered, the one-way bearing inside the pinion friction disc works in a braking state, and the one-way bearing inside the gear friction disc works in a slipping state; When the steel cable is raised, the one-way bearing inside the gear friction disc works in a braking state, and the one-way bearing inside the pinion friction disc works in a slipping state.

[0010] Further, the tensioning device variable speed shafting assembly further comprises a variable speed shaft; the variable speed shaft is driven to rotate by the one-way bearings and drives the tensioning wheel.

[0011] Further, the tensioning device variable speed shafting assembly further comprises a disc spring, which is used to drive the outer ring of the one-way bearing to rotate.

[0012] Further, the tensioning device variable speed shafting assembly further comprises an elastic retaining ring for shaft, which is used to position the one-way bearing.

[0013] Further, a press wheel adjusting block and a press spring are further included, the press spring is used to provide a pressing force for the press wheel, and the press wheel adjusting block is used to adjust the size of the pressing force.

[0014] The above technical solutions of the present application have the following advantages: The steel cable tensioning device for winch provided by the present application has the following advantages: the drum transmission gear is arranged at one end of the winch drum, a plurality of different size gears that rotate synchronously are arranged on the tensioning device transmission shaft and are simultaneously driven by the drum transmission gear, the tensioning device variable speed shafting assembly comprises a pinion friction disc and a gear friction disc, which are respectively engaged with the gears of different sizes on the tensioning device transmission shaft and are simultaneously driven by the tensioning device transmission shaft, the tensioning device variable speed shafting assembly is used to adjust the linear speed of the tensioning wheel, so that the tensioning wheel and the press wheel continuously exert downward tensioning force on the steel cable, and the downward tensioning force can be continuously exerted on the steel cable when the steel cable is reeled in or out. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the specific embodiments or the prior art of the present application, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0016] Figure 1 The structural schematic diagram of the steel cable tensioning device for winch provided by the present application is shown in the figure. Figure 2 The working schematic diagram and the structural schematic diagram of the tensioning wheel and the pressing wheel when tensioning the steel cable provided by the present application are shown in the figure. Figure 3 The structural schematic diagram of the variable speed shaft assembly of the tensioning device provided by the present application is shown in the figure. Figure 4 The mechanical principle diagram of the transmission mechanism of the tensioning device provided by the present application is shown in the figure.

[0017] The figure shows the following: 1 is the drum transmission gear; 2 is the tensioning device transmission shaft; 3 is the variable speed shaft assembly of the tensioning device; 3-1 is the pinion friction disc; 3-2 is the elastic retaining ring for shaft; 3-3 is the one-way bearing; 3-4 is the variable speed shaft; 3-5 is the large gear friction disc; 3-6 is the disc spring; 4 is the tensioning wheel; 5 is the pressing wheel; 6 is the steel cable; 7 is the drum; 8 is the pressing wheel adjusting block; 9 is the pressing spring. EMBODIMENT

[0018] In the following description, specific details are set forth in order to provide a thorough understanding of embodiments of the application. However, persons having ordinary skill in the art will readily understand that embodiments of the application can be practiced without these specific details, which are presented merely to provide that understanding. In other instances, detailed description of well-known systems, circuits, and methods have been omitted in order not to obscure the description of embodiments of the application with unnecessary detail.

[0019] It should be understood that the term "comprising" as used in the specification and in the claims indicates the presence of the recited features, integers, steps, operations, elements, and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0020] In the description of the application, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0022] In the description of the application, the reference "one embodiment" or "some embodiments" and the like means that the specific features, structures or characteristics described in connection with the embodiment are included in one or more embodiments of the application. Therefore, the statements "in one embodiment", "in some embodiments", "in other some embodiments", "in some other embodiments" and the like appearing in different places in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized.

[0023] The application provides a steel cable tensioning device for a winch, which can provide continuous and effective tensioning force to the steel cable when the steel cable is wound in or out at different speeds.

[0024] The specific embodiments of the application will be further described in detail below in conjunction with the drawings and examples. The following examples are used to illustrate the application, but are not used to limit the scope of the application.

[0025] The embodiment of the application provides a steel cable tensioning device for a winch, which comprises a drum transmission gear, a tensioning device transmission shaft, a tensioning device variable speed shaft train assembly, a tensioning wheel and a pressing wheel; the drum transmission gear is arranged at one end of a winch drum; a plurality of different size gears rotating synchronously are arranged on the tensioning device transmission shaft, and the tensioning device transmission shaft is driven by the drum transmission gear; the tensioning device variable speed shaft train assembly comprises a pinion friction disc and a gear friction disc, and is engaged with the gears of different sizes on the tensioning device transmission shaft respectively, and is driven by the tensioning device transmission shaft; the tensioning device variable speed shaft train assembly is used for adjusting the linear velocity of the tensioning wheel, so that the tensioning wheel and the pressing wheel continuously exert downward tension on the steel cable.

[0026] In some embodiments, three different size gears rotating synchronously are arranged on the tensioning device transmission shaft, and the drum transmission gear is engaged with the middle gear on the tensioning device transmission shaft.

[0027] In some embodiments, the pinion friction disc is engaged with the gears of larger size on the two sides of the tensioning device transmission shaft, and the gear friction disc is engaged with the gears of smaller size on the two sides of the tensioning device transmission shaft.

[0028] In some embodiments, paper-based friction plates are attached to the end faces of the pinion friction disc and the gear friction disc, and tight fit bearings are arranged in the inner holes.

[0029] In some embodiments, the tensioning device variable speed shaft train assembly further comprises one-way bearings, and the one-way bearings are arranged in the pinion friction disc and the gear friction disc respectively.

[0030] In some embodiments, when the steel cable descends, the one-way bearing in the pinion friction disc works in a braking state, and the one-way bearing in the gear friction disc works in a slipping state; when the steel cable ascends, the one-way bearing in the gear friction disc works in a braking state, and the one-way bearing in the pinion friction disc works in a slipping state.

[0031] In some embodiments, the tensioning device variable speed shaft train assembly further comprises a variable speed shaft; the variable speed shaft is driven to rotate by the one-way bearings, and drives the tensioning wheel.

[0032] In some embodiments, the tensioning device variable speed shaft train assembly further comprises a disc spring, and the disc spring is used for driving the outer ring of the one-way bearing to rotate.

[0033] In some embodiments, the tensioning device variable speed shaft train assembly further comprises an elastic retaining ring for shaft, and the elastic retaining ring for shaft is used for positioning the one-way bearing.

[0034] In some embodiments, a pressure wheel adjusting block and a pressure spring are further included. The pressure spring is used to provide a pressure force for the pressure wheel, and the pressure wheel adjusting block is used to adjust the pressure force.

[0035] The cable tensioning device is composed of Figure 1 As shown, the main components are transmission parts and functional parts. The transmission parts include various gears and spline shafts, while the functional parts include the tensioner and pressure roller components. The transmission mechanism includes a drum transmission gear 1, a tensioner transmission shaft 2, a tensioner speed change shaft assembly 3, a tensioner 4, a pressure roller 5, a steel cable 6, a drum 7, a pressure roller adjustment block 8, a pressure spring 9, and standard components such as rolling bearings. The tensioner speed change shaft assembly 3 includes a pinion friction disc 3-1, a shaft circlip 3-2, a one-way bearing 3-3, a speed change shaft 3-4, a large gear friction disc 3-5, a disc spring 3-6, and standard components such as rolling bearings. The drum transmission gear 1 drives the tensioning device transmission shaft 2 and the drum 7 at the same time, realizing the same fixed transmission ratio and directional transmission for both. The tensioning device transmission shaft 2 drives the large gear friction disk 3-5 and the small gear friction disk 3-1 in the tensioning device speed change shaft system assembly 3 respectively, and realizes braking and slipping through the one-way bearing 3-3. The braking one-way bearing 3-3 drives the speed change shaft 3-4 to drive the tensioning wheel 4 to rotate to ensure the direction of the tensioning force on the steel cable 6.

[0036] Combine Figure 1 The overall structural diagram shown is Figure 4 The transmission mechanical principle diagram shown in the figure gives a detailed introduction to the working process of the entire mechanism as follows: The drum drive gear 1 and the inner bore of the drum 7 are equipped with splines, which mesh to achieve power transmission. The drum drive gear 1 also has an external gear, which meshes to drive the intermediate gear on the tensioner drive shaft 2. The tensioner drive shaft 2 is equipped with three synchronously rotating gears. The tensioner drive shaft 2, through gear meshing, drives the structure on the tensioner speed change shaft assembly 3. Based on its structural features, the following detailed description is provided: The driving shaft 2 of the tensioning device drives the small gear friction disc 3-1 and the large gear friction disc 3-5 to rotate at the same time. Paper-based friction plates are attached to the end faces of the gear friction discs. The rotation of the outer ring of the one-way bearing 3-3 is driven by the friction force generated by the pressure provided by the disc spring 3-6. When the steel cable is descending, in order to ensure that the downward tensioning force is provided to the steel cable, the linear speed of the tensioning wheel 4 needs to be greater than the linear speed of the drum 7, that is, the transmission assembly needs to be speeded up. At this time, the working state of the one-way bearing 3-3 in the small gear friction disc 3-1 is braking, and the inner and outer rings of the bearing are locked to realize power transmission and drive the variable speed shaft 3-4 to rotate. At the same time, the working state of the one-way bearing 3-3 in the large gear friction disc 3-5 is slipping, so as to disconnect the power transmission. When the steel cable is ascending, in order to ensure that the downward tensioning force is provided to the steel cable, the linear speed of the tensioning wheel 4 needs to be less than the linear speed of the drum 7, that is, the transmission assembly needs to be decelerated. At this time, the working state of the one-way bearing 3-3 in the large gear friction disc 3-5 is braking, and the inner and outer rings of the bearing are locked to realize power transmission and drive the variable speed shaft 3-4 to rotate. At the same time, the working state of the one-way bearing 3-3 in the small gear friction disc 3-1 is slipping, so as to disconnect the power transmission.

[0037] The friction force generated by the tensioning wheel 4 and the pressing wheel 5 acting on the steel cable is the tensioning force of the steel cable. The pressing force provided by the pressing wheel 5 is generated by the deformation of the pressing spring 9. The inside of the pressing wheel 5 is provided with a thread, and the pressing wheel adjusting block 8 is provided with an external thread. The size of the pressing force can be adjusted by adjusting the position of the pressing wheel adjusting block 8. The braking of the one-way bearing 3-3 makes the variable speed shaft 3-4 transmit power according to the transmission ratio of the brake gear pair, and the pressing force provided by the pressing wheel 5 acting on the steel cable provides the tensioning force of the steel cable.

[0038] The tensioning wheel mechanism is provided with an overload protection system. The inner holes of the small gear friction disc 3-1 and the large gear friction disc 3-5 are provided with closely matched bearings. When the tensioning force suddenly increases due to large-angle swinging of the steel cable, the load borne by the gears on the variable speed shaft 3-4 exceeds the friction torque limit that can be provided by the paper-based friction plate, and the friction plate slips to protect the transmission mechanism. The slipping limit load can be realized by adjusting the compression amount of the disc spring 3-6.

[0039] The steel cable tensioning device for the winch provided in the embodiments of the present application can continuously provide a tensioning force to the steel cable in the winch, has a compact structure, a small space occupancy rate and a light weight. The tensioning force can be stably provided under different working conditions. The tensioning device is provided with an overload protection system, which can ensure that the transmission mechanism will not be damaged when the tensioning force suddenly increases. The size of the tensioning force can be adjusted.

[0040] The tension force is realized by the extrusion and friction of the tensioning wheel and the pressing wheel on the steel cable. Since the speed direction of the steel cable is inconsistent when it is reeled in and out, a structure needs to be designed to meet the requirement that the transmission ratio can be switched when the steel cable is reeled in and out, so as to realize the invariability of the tension force direction. When the winch hoists the load, the tension force may sharply increase due to the violent shaking of the load, thereby damaging the tensioning device. Therefore, an overload protection mechanism should be provided in the transmission mechanism.

[0041] The embodiment of the present application designs the steel cable tensioning transmission mechanism according to the above functional requirements, which can continuously exert downward tension force on the steel cable when the steel cable is reeled in and out. The speed mechanism is designed to change the transmission ratio at the same time when the speed direction of the steel cable changes, so as to maintain the invariability of the tension force direction. The protection system is designed to protect the tensioning device when the tension force sharply increases due to the violent shaking of the load.

[0042] The steel cable tensioning device for the winch provided by the embodiment of the present application can meet the requirement that the tensioning wheel continuously exerts downward tension force on the steel cable. The transmission mechanism is compact in structure, thereby reducing the space occupancy and the weight of the winch. The structure is modularized, and the replacement of the vulnerable parts is simple. The transmission ratio of the tensioning device can be changed at the same time when the speed direction of the steel cable changes, thereby ensuring the invariability of the tension force direction. The protection system is provided to ensure that the transmission mechanism will not be damaged when the tension force sharply increases. The size of the tension force can be adjusted. The speed mechanism is simple in structure and has instantaneous synchronism.

[0043] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above functional units and modules is taken as an example. In actual application, the above functions can be completed by different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can exist physically, or two or more units can be integrated in one unit. In addition, the specific names of each functional unit and module are only for easy distinction, and do not limit the protection scope of the present application.

[0044] It should be clear that each embodiment in the present specification is described in a progressive manner, and the same or similar parts of each embodiment can be referred to each other. Each embodiment focuses on the differences from other embodiments. The present application is not limited to the specific structures described above and shown in the drawings. Moreover, for the sake of brevity, detailed description of known methods and techniques is omitted.

[0045] The above-described embodiments are only used to illustrate the technical solutions of the present application, but not limit them; although the present application is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A steel cable tensioning device for a winch, characterized in that: It includes a reel drive gear, a tensioner drive shaft, a tensioner speed change shaft assembly, a tensioning wheel and a pressure wheel; The drum transmission gear is arranged at one end of the winch drum; the tensioning device transmission shaft is provided with a plurality of gears of different sizes that rotate synchronously and are simultaneously driven by the drum transmission gear; The tensioner speed change shaft assembly includes a small gear friction plate and a large gear friction plate, which are respectively engaged with gears of different sizes on the tensioner transmission shaft and are driven by the tensioner transmission shaft; The variable speed shaft assembly of the tensioning device is used to adjust the linear speed of the tensioning wheel so that the tensioning wheel and the pressure wheel continuously apply downward tensioning force to the steel cable.

2. The steel cable tensioning device for a winch according to claim 1, wherein: The transmission shaft of the tensioning device is provided with three gears of different sizes that rotate synchronously, and the reel transmission gear is engaged with and drives the intermediate gear on the transmission shaft of the tensioning device.

3. The steel cable tensioning device for a winch according to claim 2, wherein: The small gear friction disk is engaged with the larger gears on both sides of the tensioning device transmission shaft, and the large gear friction disk is engaged with the smaller gears on both sides of the tensioning device transmission shaft.

4. The steel cable tensioning device for a winch according to claim 1, wherein: The end surfaces of the small gear friction disk and the large gear friction disk are affixed with paper-based friction plates, and the inner holes are equipped with tightly fitting bearings.

5. The steel cable tensioning device for a winch according to claim 1, wherein: The tensioning device speed-changing shaft system assembly further includes a one-way bearing, which is respectively arranged inside the small gear friction plate and the large gear friction plate.

6. The steel cable tensioning device for a winch according to claim 5, characterized in that: When the steel cable descends, the one-way bearing inside the small gear friction disk works in a braking state, and the one-way bearing inside the large gear friction disk works in a slipping state; When the steel cable rises, the one-way bearing inside the large gear friction disk works in a braking state, and the one-way bearing inside the small gear friction disk works in a slipping state.

7. The steel cable tensioning device for a winch according to claim 5, wherein: The speed-changing shaft system assembly of the tensioning device further includes a speed-changing shaft; the speed-changing shaft is driven to rotate by the one-way bearing and drives the tensioning wheel.

8. The steel cable tensioning device for a winch according to claim 5, wherein: The tensioning device speed-changing shaft system assembly further includes a disc spring, which is used to drive the outer ring of the one-way bearing to rotate.

9. The steel cable tensioning device for a winch according to claim 5, wherein: The tensioning device speed-changing shaft system assembly further includes a shaft elastic circlip, which is used to position the one-way bearing.

10. The steel cable tensioning device for a winch according to claim 1, wherein: It also includes a pressure wheel adjustment block and a pressure spring, wherein the pressure spring is used to provide a pressure force for the pressure wheel, and the pressure wheel adjustment block is used to adjust the pressure force.

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