Motorized winching machine

Abstract

The utility model discloses a motorized winching machine which aims at solving the problems that a clutch and an anti-reversion device of a winching machine in the prior art are large in size and high in noise. The winching machine mainly comprises a supporting frame, a power mechanism installed on the supporting frame, a power adjusting mechanism, a clutch module installed at the output end of the power mechanism, a speed changing module installed at the output end of the clutch module and a winching device installed at the output end of the speed changing module. A centrifugal friction clutch is adopted in the clutch module, disconnection and connection of a clutch are controlled through the speed of the power mechanism, and a one-way bearing is installed at the input end of the speed changing module to prevent the winching machine from rotating reversely. Compared with a traditional winching machine, the size of the winching machine is reduced, noise is reduced, and the automation degree of the winching machine is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable traction equipment technical field, concretely relates to a motor winch. BACKGROUND

[0002] When erecting overhead high-voltage transmission lines and laying underground cables, it is often necessary to hoist and pull the cable, which requires the use of a motor winch. The existing motor winch includes a support frame, a power mechanism, a clutch module, a speed change module, and a winching device. Winches can be divided into two types according to the transmission method: friction transmission and rigid transmission. Among them, the friction transmission is to transmit the power of the power mechanism to the gearbox through a belt and a pair of size pulleys. This structure has a large size, and often requires manual force to counteract the force of the spring in the clutch to separate the power. The rigid transmission is to engage the clutch driving part on the output shaft of the power mechanism and the clutch driven part on the input shaft of the gearbox through gears. This clutch has a high precision requirement for the device, and due to the hard contact, it has a large noise and a short service life. In addition, the motor winch uses anti-reverse technology to prevent the engine from suddenly stalling during use, causing the heavy object being lifted to lose power and fall down. The existing anti-reverse technology installs a ratchet in the gearbox, but the special structure of the ratchet will make the device emit a clicking noise during operation, and the wear is large.

[0003] The inventor knows a shaft transmission motor winch (patent document number CN105523495A), which adopts a shaft transmission mode. The power claw of the elastic coupling device transmits the motion and power output to the link claw which moves synchronously with it under the action of the friction between the inner taper surface of the large coupling and the outer taper surface of the friction disc. The winch is prevented from reversing by the overrunning brake.

[0004] However, the inventor of the present application found that the above-mentioned technology at least has the following technical problems in the process of implementing the technical solutions of the embodiments of the present application:

[0005] Firstly, the clutch of this winch needs to be operated directly by the staff to control the power input, which is not automatic and increases the labor intensity. In addition, the device uses an overrunning brake to prevent the device from reversing, and the overrunning brake not only has a complex structure, but also increases the cost.

[0006] The information disclosed in this BACKGROUND section is only used to deepen the understanding of the background of the present disclosure, and should not be considered as acknowledging or implying in any form that this information constitutes prior art known to those skilled in the art. UTILITY MODEL CONTENT

[0007] The inventor finds through research that some existing clutches have large volume, high precision requirements, and manual control of clutch disconnection, which is laborious and dangerous. If the friction plate clutch and the rigid clutch are combined and the centrifugal force is used to control the disconnection and connection of the power, the above problems can be solved.

[0008] In view of at least one of the above technical problems, the present disclosure provides a motorized winch, which controls the rotating speed of the power mechanism through the power adjusting mechanism, so that the centrifugal friction clutch realizes connection and disconnection, and a one-way bearing is installed at the input end of the speed change module to prevent the device from reversing.

[0009] To achieve the above-mentioned purpose, in one aspect, the present disclosure provides a motorized winch, which comprises a support frame, a power mechanism installed on the support frame, a clutch module installed at the output end of the power mechanism, a speed change module installed at the output end of the clutch module, and a winch device installed at the output end of the speed change module, the clutch module comprises a centrifugal friction clutch, the power mechanism is connected with a power adjusting mechanism, and a one-way bearing is installed at the input end of the speed change module to prevent reverse rotation transmission.

[0010] In some embodiments of the present disclosure, the clutch module comprises a protective cover installed on the support frame, the centrifugal friction clutch is installed in the protective cover, and a shaft coupling is installed on the output shaft of the centrifugal friction clutch.

[0011] In some embodiments of the present disclosure, the centrifugal friction clutch comprises a driving part, a driven part installed on the outer side of the driving part, and a deep groove ball bearing installed in the driven part.

[0012] In some embodiments of the present disclosure, the output shaft of the power mechanism and the input shaft of the speed change module are connected through the centrifugal friction clutch, wherein the output shaft of the power mechanism is directly connected with the driving part of the centrifugal friction clutch, and the driven part of the centrifugal friction clutch is connected with the speed change module in transmission.

[0013] In some embodiments of the present disclosure, the power mechanism adjusts the rotating speed of its output through the power adjusting mechanism, thereby controlling the combination and disconnection of the centrifugal friction clutch, and controlling the operation of the winch.

[0014] In some embodiments of the present disclosure, the one-way bearing is installed on the input shaft of the speed change module, so that the input shaft of the speed change module rotates in one direction according to the rotating direction of the output shaft of the power mechanism.

[0015] One or more technical solutions provided in the embodiments of the present disclosure have at least any of the following technical effects or advantages:

[0016] 1. The centrifugal friction clutch effectively solves the problem of large size and high cost of the existing winch clutch, thereby reducing the size and cost of the device.

[0017] 2. The power adjusting mechanism is used to indirectly control the power transmission of the device, effectively overcoming the low automation level of the existing winch and saving labor costs.

[0018] 3. The one-way bearing effectively solves the problem of complex structure and large size of the existing winch anti-reverse device, thereby reducing the cost and saving the space. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 It is a schematic diagram of the overall structure of an embodiment of the present disclosure.

[0020] Fig. 2 It is a schematic diagram of the structure of the centrifugal friction clutch and its transmission route in an embodiment of the present disclosure.

[0021] Fig. 3 It is a side view of the centrifugal friction clutch and its transmission route in an embodiment of the present disclosure.

[0022] In the above figures, 1 is a support frame, 2 is a power mechanism, 3 is a power adjusting mechanism, 4 is a clutch module, 5 is a speed change module, 6 is a winching device, 21 is a power mechanism output shaft, 41 is a core of a flail block, 42 is a centrifugal flail block, 43 is a retraction spring, 44 is a deep groove ball bearing, 45 is a clutch housing, 46 is a protective cover, 47 is a shaft coupling, 51 is a speed change module input shaft, and 52 is a one-way bearing. DETAILED DESCRIPTION

[0023] In the description of the present disclosure, it should be understood that the terms "up", "down", "front", "back", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. The "first", "second", etc. involved in the present application are used to distinguish the described objects and do not have any sequential or technical meaning. The "connection" and "coupling" involved in the present application include direct and indirect connections (couplings) unless otherwise specified.

[0024] The unit modules (parts, structures, mechanisms) or sensors and other devices involved in the following embodiments are all conventional commercially available products unless otherwise specified.

[0025] The embodiment of the present disclosure aims to solve the problems of large size, short service life and noise caused by the complex structure of the existing winch by providing a motorized winch, using a centrifugal friction clutch in the clutch module to avoid hard contact, achieve smooth power output, and improve the degree of automation.

[0026] The technical solution in the embodiment of the present disclosure is to solve the above problems, and the general idea is as follows:

[0027] The power output by the power mechanism drives the centrifugal flyweight of the centrifugal friction clutch to rotate, so that the centrifugal flyweight contacts the clutch housing, thereby enabling the clutch to output power to the gearbox. A one-way bearing is installed at the input end of the speed change module, so that the input end can only rotate in a fixed direction. The power output from the clutch module drives the gear train assembly of the speed change device to rotate in the set direction, and is transmitted to the output end, thereby driving the winch to rotate, so that the machine can operate normally.

[0028] In order to better understand the technical solution of the present disclosure, the above technical solution will be described in detail below in combination with the drawings in the specification and specific embodiments.

[0029] The present example discloses a motorized winch, referring to Figs. 1 to 3 , comprising a power mechanism 2, which is a gasoline engine. The output shaft 21 of the power mechanism 2 is fixed to the flyweight middle core 41 of the clutch module 4 through a key. The rotating holes of the three centrifugal flyweights 42 are installed on the fixed holes of the flyweight middle core 41, so that the centrifugal flyweights 42 slide along the route specified by the flyweight middle core. There are two side recesses on the centrifugal flyweight 42, and the three centrifugal flyweights 42 can form a complete circle after being combined on the left and right sides. A retractable spring 43 is embedded in each of the two circles to tighten the centrifugal flyweight 42. The centrifugal flyweight 42 has a clutch housing 45 on the outside, and there is a gap between the clutch housing 45 and the centrifugal flyweight 42. Only when the centrifugal flyweight 42 is thrown, can it be combined with the clutch housing 45. Two deep groove ball bearings 44 are statically pressed in the holes of the clutch housing, and their inner holes are fitted on the output shaft of the power mechanism 2 to ensure that the clutch housing and the output shaft of the power mechanism 2 rotate coaxially. The power adjustment mechanism 3 is a control handle installed on the protective cover 46, and there is a soft shaft tension bar with one end installed on the lower side of the control handle and the other end installed on the air door of the engine. The output shaft of the clutch housing 45 is connected in transmission with the input shaft 51 of the speed change module 5 through a shaft coupling 47, and the speed change module output shaft is fixed with the winch input shaft. The power mechanism, clutch module, speed change module and winch described above are all fixed on the support frame 1 by screw connection.

[0030] When working, pull the control handle of the power control device 3, the soft shaft pull rod connected to the lower side of the control handle is pulled tight, the throttle of the gasoline engine of the power mechanism 2 is pulled, the throttle is opened, the engine starts, and the output shaft rotates. The power mechanism output shaft 21 drives the flyweight middle core 41 in the clutch module 4 to rotate, the centrifugal flyweight 42 installed on the flyweight middle core 41 rotates and generates centrifugal force under the action of the centrifugal force. The centrifugal flyweight 42 slides outward along the fixed hole of the flyweight middle core 41. The retraction spring 43 is elastically deformed under the action of the centrifugal flyweight 42, thereby generating a contraction force, which acts on the centrifugal flyweight 42, equivalent to a downward pressure, so that the centrifugal flyweight 42 cannot slide along the fixed hole of the flyweight middle core 41. Until the rotation speed of the flyweight middle core 41 reaches a certain value under the power output by the power mechanism 2, the centrifugal force of the centrifugal flyweight 42 is greater than the downward pressure of the retraction spring 43 on the centrifugal flyweight 42, and the centrifugal flyweight 42 starts to move outward until it is pressed against the inner hole surface of the clutch housing 45. The pressure of the centrifugal flyweight 42 on the clutch housing 45 will generate a friction force between the contact surfaces thereof. When the pressure reaches a certain value, the sliding friction therebetween will change into static friction, and the centrifugal flyweight 42 and the clutch housing 45 will be combined into one, so that the clutch housing 51 rotates with the centrifugal flyweight 42. The output end of the clutch housing 45 is combined with the variable speed module input shaft 51 of the variable speed module 5 through the shaft coupling 47, and drives the variable speed module input shaft 51 to rotate, and the power is transmitted to the gearbox through the single row bearing 52. The power is transmitted to the winch device 6 through the gear train assembly of the gearbox and the output shaft of the variable speed module 5, and drives the weight to rise. Pull the control handle of the power control device 3 again, the throttle of the engine is closed, and the winch stops running.

[0031] When the power mechanism 2 is accidentally turned off, the weight lifted by the winch device 6 has a downward trend under the action of gravity, and drives the winch device to rotate in the opposite direction. After a series of transmissions through the variable speed module 5, the trend of the reverse rotation is transmitted to the variable speed module input shaft 51. Because the one-way bearing 52 is installed on the variable speed module input shaft 51, the trend continues to be transmitted to the power mechanism 2, so that the reverse rotation of the winch cannot be realized, thereby ensuring the safety of workers and facilities during operation.

[0032] Although some preferred embodiments of the present disclosure have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present disclosure.

[0033] It will be apparent to those skilled in the art that various modifications and variations can be made to the disclosed embodiments without departing from the spirit or scope of the disclosure. Thus, it is intended that the present disclosure cover the modifications and variations of this disclosure provided they come within the scope of the appended claims and their equivalents.

Claims

1. A motorized winch, comprising a support frame, a power mechanism mounted on the support frame, a clutch module mounted on the output end of the power mechanism, a transmission module mounted on the output end of the clutch module, and a winch device mounted on the output end of the transmission module, characterized in that: The clutch module includes a centrifugal friction clutch, the power mechanism is connected to a power adjustment mechanism, and a one-way bearing is installed at the input end of the transmission module to prevent reverse rotation transmission. The clutch module includes a protective cover mounted on a support frame, a centrifugal friction clutch is disposed inside the protective cover, and a corresponding coupling is mounted on the output shaft of the centrifugal friction clutch. The centrifugal friction clutch includes a driving part and a driven part mounted on its outer side, and a corresponding deep groove ball bearing is installed in the driven part; The output shaft of the power mechanism is connected to the input shaft of the transmission module through the centrifugal friction clutch. The output shaft of the power mechanism is directly connected to the driving part of the centrifugal friction clutch, and the driven part of the centrifugal friction clutch is connected to the transmission module through the coupling.

2. The motorized winch according to claim 1, characterized in that, The power mechanism adjusts its output speed through the power adjustment mechanism, thereby controlling the engagement and disengagement of the centrifugal friction clutch, and thus controlling the operation of the winch.

3. The motorized winch according to claim 1, characterized in that, The one-way bearing is installed on the input shaft of the transmission module so that the input shaft of the transmission module rotates unidirectionally in the same direction as the output shaft of the power mechanism.

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