CN116281703A - Motor direct-drive winch - Google Patents

Abstract

The application relates to the technical field of workover rig transmission devices, and particularly discloses a motor direct-drive winch which comprises a winch frame, a roller, a disc brake device and a variable frequency motor, wherein the roller is rotatably arranged on the winch frame; the disc brake device is connected to one end face of the roller and is arranged on the winch frame; and the variable frequency motor is connected to the other end face of the roller, the variable frequency motor is arranged on the winch frame, and an output shaft of the variable frequency motor and the axis of the roller are coaxially arranged. The variable frequency motor is used as a power source, so that the problems of serious noise and waste pollution are effectively avoided, and meanwhile, the transmission mechanism is simplified by coaxially arranging the output shaft of the variable frequency motor and the axis of the roller, so that the lossless transmission of torque can be realized, and the transmission efficiency is improved.

Description

Motor direct-drive winch

Cross Reference to Related Applications

The present application claims priority from PCT/CN2022/119938, filed on month 09 and 20 of 2022, entitled "motor direct drive winch," the entire contents of which are incorporated herein by reference.

Technical Field

The application relates to the technical field of workover rig transmission devices in general, and specifically discloses a motor direct-drive winch.

Background

For the car decoration well machine in the petroleum or natural gas exploitation industry, a winch is one of the indispensable transmission mechanism components, power is transmitted to the winch by an engine or a motor, and the winch drives a traveling system to lift, so that a pipe column and other working tools are lifted and lowered.

At present, most winches use a diesel engine as a power source, and power is transmitted to the winches through transmission components such as a gearbox, a transmission shaft, a parallel box, an angle box and a chain box in sequence, however, the workover rig has serious noise and waste gas pollution, and the diesel engine has the advantages of large maintenance workload, high maintenance cost and low working efficiency.

Disclosure of Invention

The main aim of the application is to provide a motor direct-drive winch, which solves the problems of serious noise and waste gas pollution of the winch.

In order to achieve the purpose of the invention, the application adopts the following technical scheme:

the application provides a motor direct-drive winch, include:

a frame;

the roller is rotatably arranged on the winch frame;

the disc brake device is connected to one end face of the roller and is arranged on the winch frame; and

the variable frequency motor is connected to the other end face of the roller, the variable frequency motor is arranged on the winch frame, and an output shaft of the variable frequency motor and the axis of the roller are coaxially arranged.

In an alternative scheme of this application, the cylinder includes the axis body and overlaps and locate the barrel of axis body outside week side, the axis body rotate set up in on the frame, the one end suit of axis body in the rotor shaft hole of inverter motor, the axis body with inverter motor is connected through the toper clamp coupling.

In an alternative scheme of this application, the disc brake device including set up in brake disc, normal close safety tongs and the normal open safety tongs on the frame of the hoist, the disc brake device is still including being used for the promotion braking the first braking piece of normal close safety tongs and be used for the promotion braking the second braking piece of normal open safety tongs.

In an alternative scheme of this application, still be provided with emergent power device on the frame, emergent power device includes: the device comprises a driving piece and a first transmission piece connected with the driving piece, wherein one end of the roller is fixed with a second transmission piece in transmission connection with the first transmission piece.

In an alternative scheme of this application, first driving medium is first gear, the driving medium is used for the drive the rotation of gear, the second driving medium be with first gear engaged with second gear, just the number of teeth of second gear is more than the number of teeth of first gear.

In an alternative scheme of the application, a first encoder is installed at the input end of the variable frequency motor, a second encoder is installed at the output end of the roller, the first encoder is used for acquiring the rotation times of the variable frequency motor, and the second encoder is used for acquiring the rotation times of the roller so as to monitor the connection reliability of the conical clamping coupling; the winch frame is also provided with a controller which is electrically connected with the first encoder, the second encoder, the disc brake device and the variable frequency motor.

In an alternative scheme of this application, be provided with on the frame of the hoist and be used for the control inverter motor temperature's temperature sensor, inverter motor is other still to be installed variable frequency fan, temperature sensor and variable frequency fan all with controller electric connection.

In an alternative scheme of this application, still be provided with the terminal box on the frame, the controller set up in the terminal box, just inverter motor temperature sensor the variable frequency fan the first encoder and the electric wire of second encoder all set up in through integrated mode of connection in the terminal box.

In an alternative scheme of the application, the winch frame comprises a bottom pry, two vertical frames are arranged on the bottom pry at intervals, and the roller is rotatably arranged between the two vertical frames; the bottom of the bottom sled can be detachably connected with a chassis truck auxiliary beam.

In an alternative scheme of this application, two the relative one side that sets up of grudging post all is provided with the rope guide frame, the rope guide frame is located the top of cylinder, it is provided with the rope guide roller to rotate on the rope guide frame.

According to the motor direct-drive winch provided by the embodiment of the application, the motor direct-drive winch comprises a winch frame; the roller is rotatably arranged on the winch frame; the disc brake device is connected to one end face of the roller and is arranged on the winch frame; and the variable frequency motor is connected to the other end face of the roller, the variable frequency motor is arranged on the winch frame, and an output shaft of the variable frequency motor and the axis of the roller are coaxially arranged. The variable frequency motor is used as a power source, so that the problems of serious noise and waste pollution are effectively avoided, and meanwhile, the transmission mechanism is simplified by coaxially arranging the output shaft of the variable frequency motor and the axis of the roller, so that the lossless transmission of torque can be realized, and the transmission efficiency is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

Fig. 1 shows a front view of a motor direct drive winch provided by an embodiment of the present application;

FIG. 2 shows a left side view of a motor direct drive winch provided by an embodiment of the present application;

FIG. 3 illustrates a right side view of a motor direct drive winch provided by an embodiment of the present application;

fig. 4 shows a top view of a motor direct drive winch provided by an embodiment of the present application;

fig. 5 shows an axial schematic view (one) of a motor direct-drive winch according to an embodiment of the present application;

fig. 6 shows an axial schematic diagram (two) of a motor direct-drive winch according to an embodiment of the present application.

Wherein reference numerals are as follows:

1. a frame; 2. a roller; 3. a disc brake device; 31. a brake disc; 32. normally closed safety tongs; 33. normally open safety tongs; 4. a variable frequency motor; 5. conical clamping couplings; 6. an emergency power device; 61. a driving member; 62. a first transmission member; 63. a second transmission member; 7. a first encoder; 8. a second encoder; 9. a variable frequency fan; 10. a junction box; 11. a bottom pry; 12. a vertical frame; 13. chassis truck auxiliary beams; 14. a rope guide frame; 15. rope guiding rollers; 16. overwinding anti-collision device.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.

It should be noted that, in the description and claims of the present application and the above figures, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be capable of being practiced otherwise than as specifically illustrated and described herein.

Moreover, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those elements but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Referring to fig. 1-4, the embodiment of the application discloses a motor direct-drive winch, which comprises a winch frame 1, a roller 2, a disc brake device 3 and a variable frequency motor 4, wherein the roller 2 is rotatably arranged on the winch frame 1; the disc brake device 3 is connected to one end face of the roller 2, and the disc brake device 3 is arranged on the winch frame 1. The variable frequency motor 4 is connected to the other end face of the roller 2, the variable frequency motor 4 is arranged on the winch frame 1, and an output shaft of the variable frequency motor 4 and an axis of the roller 2 are coaxially arranged.

In the application, the variable frequency motor 4 is used as a power source, the rotation winding and unwinding of the steel wire rope of the roller 2 can be realized by controlling the torque direction and the speed direction of the variable frequency motor 4 only through a variable frequency control system, a swimming system, a pipe column or a working tool are driven to lift, lower and hover, the convenience of winch control is highlighted, and the winch braking response speed is also highlighted through the combination of the disc brake device 3; in addition, the problems of serious noise and waste pollution can be effectively avoided, and meanwhile, the transmission mechanism is simplified by coaxially arranging the output shaft of the variable frequency motor 4 and the axis of the roller 2, so that the lossless transmission of torque can be realized, and the transmission efficiency is improved.

The variable frequency motor 4 is used as the rotation driving force of the roller 2, so that the problems of serious noise and waste pollution generated by taking a diesel generator as a power source of a transmission winch can be solved, the problems of large maintenance workload, high maintenance cost, low working efficiency and the like of a diesel vehicle can also be solved, and the problems of long line and low mechanical transmission efficiency of a winch transmission system can be caused by taking the diesel engine as the power source; the belt brake has the advantages of small brake moment, easy brake drum breakage and the like, and the problems can be solved by adopting the variable frequency motor 4 as a power source.

In addition, through setting up the output shaft of inverter motor 4 and the axis coaxial of cylinder 2, realize that inverter motor 4 is directly connected with cylinder 2 for winch overall drive simple structure, transmission efficiency are high, small, light in weight, occupation space are little.

Referring to fig. 1-4, the roller 2 comprises a shaft body and a cylinder body sleeved on the outer periphery of the shaft body, the shaft body is rotatably arranged on the winch frame 1, one end of the shaft body is sleeved in an inner shaft hole of a rotor of the variable frequency motor 4, and the shaft body is connected with the variable frequency motor 4 through a conical clamping coupler 5. The rotor of the variable frequency motor 4 is an inner shaft hole, the shaft body of the roller 2 is a through shaft, one end of the shaft body is sleeved in the inner shaft hole of the rotor, the rotor of the variable frequency motor 4 and the roller 2 share the same bearing, and the rotor inner shaft hole and the shaft body can be automatically centered through the connection of the conical clamping coupler 5, so that coaxiality is ensured. And adopt toper clamp coupling 5 direct connection, can realize the lossless transmission of moment, compare in current winch, removed complicated drive mechanism, can be very big shorten the connection length dimension of inverter motor 4 and cylinder 2, and then realize the whole width reduction of winch for the condition that the width surpassed can not take place after installing chassis car for the winch, guarantee the stability and the reliability of the follow-up installation of winch.

In the actual use process, when the winch is lowered, the gravitational potential energy of the traveling crane system drags the roller 2 to rotate through the steel wire rope, and the output shaft of the variable frequency motor 4 is driven to passively rotate. When the variable frequency vector control system of the variable frequency motor 4 enables the edge skin motor to passively rotate, the variable frequency motor 4 becomes a generator and outputs electric energy to the outside, so that potential energy recovery and power generation of the workover rig floating system are realized, and the operation cost is saved.

Referring to fig. 2 and 4, the disc brake device 3 includes a brake disc 31, a normally closed safety gear 32 and a normally open safety gear 33 provided on the winch frame 1, and the disc brake device 3 further includes a first braking member for pushing and braking the normally closed safety gear 32 and a second braking member for pushing and braking the normally open safety gear 33. The first braking member and the second braking member can be the same structural component or different structural components, and the principle of the first braking member and the second braking member is to push braking by adopting fluid pressure, wherein the fluid pressure comprises but is not limited to compressed air and hydraulic power. The normally closed safety tongs 32 are used for parking braking of the winch, the normally open safety tongs 33 are used for braking in the winch operation process, and when the winch needs emergency braking, the normally closed safety tongs 32, the normally open safety tongs 33 and the variable frequency motor 4 are braked simultaneously.

Referring to fig. 1 to 6, the winch frame 1 is further provided with an emergency power device 6, and the emergency power device 6 includes: the roller comprises a driving member 61 and a first transmission member 62 connected with the driving member 61, wherein a second transmission member 63 in transmission connection with the first transmission member 62 is fixed at one end of the roller 2. The driving member 61 drives the first transmission member 62 to rotate, and the first transmission member 62 transmits the rotational force to the drum 2 through the second transmission member 63, so that the drum 2 can be kept rotating even when the variable frequency motor 4 fails. Therefore, when the variable frequency motor 4 cannot work normally due to power failure or failure of the variable frequency motor 4, the emergency power device 6 is used as a standby power source to ensure the normal rotation of the roller 2.

Specifically, the first transmission member 62 is a first gear, the driving member 61 is configured to drive the gear to rotate, the second transmission member 63 is a second gear meshed with the first gear, and the number of teeth of the second gear is greater than that of the first gear. Wherein the drive 61 includes, but is not limited to, an electric motor, a pneumatic motor, a hydraulic motor, etc., the emergency power device 6 engages a first gear of the emergency power device 6 with a second gear connected to the winch drum 2 by means of a clutch engagement mechanism. The emergency power device 6 drives the roller 2 to realize emergency lifting of limited load through the speed reduction and torque increase of the gears by setting the number of teeth of the second gear to be greater than that of the first gear; serious operation accidents caused by power failure or failure of the variable frequency motor 4 and the like are avoided, and the safety of well repair operation is improved.

Referring to fig. 1 to 6, in the present application, a first encoder 7 is installed at an input end of the variable frequency motor 4, a second encoder 8 is installed at an output end of the drum 2, the first encoder 7 is used for obtaining the rotation number of the variable frequency motor 4, and the second encoder 8 is used for obtaining the rotation number of the drum 2 to monitor the connection reliability of the tapered clamping coupling 5; the winch frame 1 is also provided with a controller which is electrically connected with the first encoder 7, the second encoder 8, the disc brake device 3 and the variable frequency motor 4.

The winch is provided with a first encoder 7 and a second encoder 8, wherein the first encoder 7 is arranged at the input end of the variable frequency motor 4, the second encoder 8 is arranged at the output end of the roller 2, signals detected by the first encoder 7 and the second encoder 8 are transmitted to the controller, and whether the connection of the conical clamping coupling 5 between the variable frequency motor 4 and the roller 2 fails is judged by detecting the difference of rotation times of the first encoder 7 and the second encoder 8 in the same time. In addition, the second encoder 8 provided at the output end of the drum 2 also has a function of detecting the winch rotation speed in real time. If the relative rotation times of the first encoder 7 and the second encoder 8 are different, or the detected winch rotation speed exceeds the maximum rotation speed set by the winch, the controller can immediately and synchronously start the hovering dynamic braking of the variable frequency motor 4 and the braking of the disc braking device 3, so that the real-time monitoring and emergency control capability of winch operation are realized, and the reliability and safety of winch operation are greatly improved.

Referring to fig. 1-6, the winch frame 1 is provided with a temperature sensor for monitoring the temperature of the variable frequency motor 4, a variable frequency fan 9 is further installed beside the variable frequency motor 4, and the temperature sensor and the variable frequency fan 9 are electrically connected with the controller. The whole variable frequency fan 9 is supported by a volute air outlet connecting flange and is arranged on the variable frequency motor 4, and a dust filtering device is arranged at an air inlet of the variable frequency fan 9. In addition, the variable frequency fan 9 is a fan controlled by the variable frequency driving part 61, and thus, the temperature of the variable frequency motor 4 is monitored by detecting a temperature sensor and a temperature signal is transmitted to a controller, and the controller changes the power of the variable frequency fan 9 in real time by the temperature signal.

Optionally, the air inlet and the air outlet of the variable frequency fan 9 adopt noise reduction treatment, so that the problems of high energy consumption, energy waste and high noise of the winch variable frequency fan 9 in the industry due to constant power are solved. It should be noted that, the noise reduction treatment of the air inlet and the air outlet of the variable frequency fan 9 includes setting noise reduction pieces at the air inlet and the air outlet of the variable frequency fan 9 to achieve the noise reduction effect. In addition, the frequency conversion fan 9 of the finished product which is subjected to noise reduction treatment integrally can be directly selected.

The winch frame 1 is also provided with a junction box 10, the controller is arranged in the junction box 10, and the variable frequency motor 4, the temperature sensor, the variable frequency fan 9, the first encoder 7 and the wires of the second encoder 8 are all arranged in the junction box 10 in an integrated wiring mode; the junction box 10 is also provided with a scram self-locking button, the scram self-locking button is used for controlling scram operation of the variable frequency motor 4, the scram self-locking button is arranged on the junction box 10, and if intelligent control of the variable frequency motor 4 fails, the scram self-locking button can be quickly and manually pressed to realize scram operation of the variable frequency motor 4.

The variable frequency motor 4 is also provided with a wind pressure switch and a dampproof heating belt, when the temperature sensor detects that the temperature of the variable frequency motor 4 is too high, or wind pressure switch detection equipment can immediately feed back to the controller under the condition of unsmooth exhaust, the controller decelerates or stops the variable frequency motor 4. When the external environment temperature is lower than the allowable use temperature, or the temperature is too low, the variable frequency motor 4 is condensed and frosted, or the device is stopped, the power supply is connected to heat the variable frequency motor 4, so that the variable frequency motor 4 is prevented from being wetted, the insulation performance is reduced, and the safety of the device is affected. The temperature sensor, the wind pressure switch and the moistureproof heating belt are matched with each other in the controller, so that the service life of the variable frequency motor 4 is protected, the working environment of the variable frequency motor 4 is timely adjusted, and the working safety is greatly improved.

The variable frequency motor 4 and the junction box 10 are all explosion-proof products, the variable frequency fan 9 and the emergency stop self-locking button are explosion-proof products, the damp-proof heating belt is an security-increasing product, and the temperature sensor and the wind pressure switch are intrinsically safe products.

In addition, the power cable of inverter motor 4, inverter fan 9, temperature sensor, dampproofing heating tape, wind pressure switch, scram auto-lock button element, temperature sensor temperature measuring resistor's return circuit cable line, electric wires such as the sensing cable line of first encoder 7 and second encoder 8 all adopt integrated wiring mode in terminal box 10, have realized the explosion-proof effect of winch cable binding post, have improved complete machine electrical security greatly.

Referring to fig. 1-6, the frame 1 includes a base sled 11, two uprights 12 are disposed on the base sled 11 at intervals, and the drum 2 is rotatably disposed between the two uprights 12; the bottom of the bottom sled 11 is detachably connected with a chassis truck auxiliary beam 13. The stand 12 is welded with the bottom sled 11, and the bottom sled 11 and the auxiliary chassis beam 13 may be detachably connected by bolts or pins, and the bolt set is reversely threaded from the table top of the auxiliary chassis beam 13 by welding nuts or tapping on the bottom sled 11 on the rear back plate side of the winch; the roller 2 is mounted on the uprights 12 on both sides of the frame 1 by means of roller bearings, bushings, bolt sets, etc.

The winch frame 1 further comprises a disc brake shield and an oil baffle, and the disc brake shield and the oil baffle are connected with the winch frame 1 through bolts. The side of the disc brake shield is provided with a net-shaped observation hole and two push-pull maintenance windows, and the disc brake shield is used for observing the working state of the disc brake device 3 and overhauling the normally open working clamp and the normally closed safety clamp 32 in time. The winch is integrally arranged on the winch frame 1, and the winch is integrally and independently slewed; the problems of limited winch fixed installation space and inconvenient disassembly, assembly and maintenance are solved, tight connection of all sledge body parts of the workover rig is realized, quick installation and disassembly of a winch are realized, and compactness and modularization of overall arrangement are improved.

Optionally, two opposite sides of the stand 12 are provided with rope guiding frames 14, the rope guiding frames 14 are located above the drum 2, and rope guiding rollers 15 are rotatably arranged on the rope guiding frames 14. The winch frame 1 is also provided with a rope guide shield, the rope guide shield is connected with the winch frame 1 by adopting bolts, and the rope guide frame 14 is arranged on the rope guide shield. Rope guides are arranged on two sides of the axis of the roller 2, and when the steel wire rope approaches the edge of the roller 2, the rope guide rollers 15 on the rope guide frame 14 change the transverse rope outlet direction of the steel wire rope, so that ineffective friction between the steel wire rope and the roller 2 is prevented.

Referring to fig. 1 to 6, in the present application, the hoist frame 1 is further provided with an overwinding collision preventing device 16, and the overwinding collision preventing device 16 is used for detecting whether the drum 2 is excessively wound with a wire rope, so as to prevent a serious accident caused by collision of a swimming system with a derrick crown block. The inner side of the top of the winch frame 1 is provided with a sliding rail wheel groove, and the overwinding anti-collision device 16 is arranged in the sliding rail wheel groove.

In summary, when a pipe string or other working tools need to be lifted during well workover, the low-fundamental-frequency high-torque alternating-current variable-frequency motor 4 is used as a power source, the roller 2 is directly driven to rotate through the conical clamping coupler 5, and the steel wire rope on the roller 2 is wound to drive the traveling system, the pipe string or the working tools to lift. The electric frequency changed by the workover rig frequency converter is transmitted to the variable frequency motor 4 to change the rotating speed of the variable frequency motor 4, so that the lifting speed is effectively controlled.

When the pipe column or other working tools need to be lowered during well repairing operation, the roller 2 is driven by the self gravity of the swimming system, the pipe column or the working tools to release the steel wire rope on the roller 2, so that the lowering of the swimming system, the pipe column or the working tools is completed. The controller controls the hovering energy consumption braking of the variable frequency motor 4 and the braking of the disc braking device 3, so that the lowering speed and the hovering load are effectively controlled.

The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Many modifications and variations to these embodiments will be apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application are intended to be included within the scope of the present application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A motor direct drive winch comprising:

a winch frame (1);

the roller (2) is rotatably arranged on the winch frame (1);

the disc brake device (3) is connected to one end face of the roller (2), and the disc brake device (3) is arranged on the winch frame (1); and

the variable frequency motor (4) is connected to the other end face of the roller (2), the variable frequency motor (4) is arranged on the winch frame (1), and an output shaft of the variable frequency motor (4) and an axis of the roller (2) are coaxially arranged.

2. The motor direct-drive winch according to claim 1, wherein the roller (2) comprises a shaft body and a cylinder body sleeved on the outer periphery of the shaft body, the shaft body is rotatably arranged on the winch frame (1), one end of the shaft body is sleeved in a rotor inner shaft hole of the variable frequency motor (4), and the shaft body is connected with the variable frequency motor (4) through a conical clamping coupler (5).

3. The motor direct drive winch according to claim 1, wherein the disc brake device (3) comprises a brake disc (31), a normally closed safety gear (32) and a normally open safety gear (33) arranged on the winch frame (1), the disc brake device (3) further comprising a first brake member for pushing and braking the normally closed safety gear (32) and a second brake member for pushing and braking the normally open safety gear (33).

4. The electric motor direct drive winch according to claim 1, wherein the winch frame (1) is further provided with an emergency power device (6), the emergency power device (6) comprising: the device comprises a driving piece (61) and a first transmission piece (62) connected with the driving piece (61), wherein a second transmission piece (63) in transmission connection with the first transmission piece (62) is fixed at one end of the roller (2).

5. The motor direct drive winch according to claim 4, wherein the first transmission member (62) is a first gear, the driving member (61) is configured to drive rotation of the gear, the second transmission member (63) is a second gear meshed with the first gear, and the number of teeth of the second gear is greater than the number of teeth of the first gear.

6. The motor direct-drive winch according to claim 2, wherein a first encoder (7) is mounted at the input end of the variable frequency motor (4), a second encoder (8) is mounted at the output end of the drum (2), the first encoder (7) is used for acquiring the rotation times of the variable frequency motor (4), and the second encoder (8) is used for acquiring the rotation times of the drum (2) so as to monitor the connection reliability of the conical clamping coupling (5); the winch frame (1) is also provided with a controller which is electrically connected with the first encoder (7), the second encoder (8), the disc brake device (3) and the variable frequency motor (4).

7. The motor direct-drive winch according to claim 6, wherein a temperature sensor for monitoring the temperature of the variable frequency motor (4) is arranged on the winch frame (1), a variable frequency fan (9) is further arranged beside the variable frequency motor (4), and the temperature sensor and the variable frequency fan (9) are electrically connected with the controller.

8. The motor direct-drive winch according to claim 7, wherein a junction box (10) is further arranged on the winch frame (1), the controller is arranged in the junction box (10), and the variable frequency motor (4), the temperature sensor, the variable frequency fan (9), the first encoder (7) and the wires of the second encoder (8) are all arranged in the junction box (10) in an integrated wiring mode.

9. The motor direct-drive winch according to claim 1, wherein the winch frame (1) comprises a bottom sled (11), two stand frames (12) are arranged on the bottom sled (11) at intervals, and the roller (2) is rotatably arranged between the two stand frames (12); the bottom of the bottom sled (11) is detachably connected with a chassis truck auxiliary beam (13).

10. The motor direct-drive winch according to claim 9, wherein rope guiding frames (14) are arranged on one sides of the two vertical frames (12) which are arranged oppositely, the rope guiding frames (14) are located above the roller (2), and rope guiding rollers (15) are rotatably arranged on the rope guiding frames (14).

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