Electric mechanical winching machine

Abstract

The invention belongs to the technical field of mechanical winching, and particularly discloses an electric mechanical winching machine which is provided with a power device, a transmission system and a winding drum, the transmission system is provided with a reduction gearbox body, a third rotating shaft, a fourth rotating shaft, a fifth transmission shaft and a first rotating shaft are sequentially arranged in the reduction gearbox body from top to bottom, and each transmission shaft is provided with a multi-stage gear transmission. A direction sliding gear can be used for reversing, a gear sliding gear set can be used for gear shifting, the transmission system is braked through a braking ratchet wheel assembly, and a planetary reduction gear is arranged between the left end of the third rotating shaft and the winding drum assembly. The transmission has the beneficial effects of more stable output, larger transmission ratio, larger torque, simplicity and convenience in operation, convenience in maintenance and the like.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mechanical winching, and particularly discloses a power mechanical winch. BACKGROUND

[0002] In power engineering construction, mechanical winching is a commonly used equipment, mainly used for cable deployment, tightening and tower erection and other operations. However, the existing power mechanical winch has some deficiencies in actual application. For example, the structure design of part of the winch is not reasonable enough, resulting in poor stability, which is prone to shaking or even toppling during winching operation, affecting construction safety and efficiency; the power transmission efficiency of some winches is low, the energy consumption is large, and the construction cost is increased; the operation of some winches is not convenient enough, the skill requirement of the operator is high, and there are certain difficulties in maintenance and maintenance, which requires more manpower and time cost.

[0003] In the prior art, CN220980238U discloses a novel speed reduction mechanism and a light winch, the novel speed reduction mechanism comprising an input shaft, an output shaft arranged in parallel with the input shaft, a spline shaft arranged in parallel with the input shaft on one side of the input shaft, and a brake shaft arranged in parallel with the output shaft on one side of the output shaft; the input shaft arranged in the housing is sequentially provided with a gear, a direction gear from left to right; the spline shaft is sequentially provided with a gear shift gear, a direction shift gear from left to right; the gear shift gear is engaged with the gear, and the direction shift gear is engaged with the direction gear; the output shaft is sequentially provided with a spiral gear, a brake gear, a multi-stage planetary carrier, and dynamic friction plates and static friction plates arranged on both sides of the brake gear from left to right; the spiral gear is engaged with the gear; the brake shaft is sequentially provided with a brake ratchet and a brake ratchet gear from left to right; the brake ratchet gear is engaged with the brake gear; and the end of the three-stage planetary carrier is connected with a grinding core.

[0004] The above prior art has the following defects: the transmission is small, and the torque is small. SUMMARY

[0005] In order to solve the above problems, the purpose of the present application is to disclose a power mechanical winch, which is realized by adopting the following technical scheme.

[0006] A power mechanical winch has a power device, a transmission system and a drum; The transmission system has a reduction box body, and the reduction box body is sequentially provided with a third rotating shaft, a fourth rotating shaft, a fifth transmission shaft and a first rotating shaft from top to bottom, and the transmission system is braked by a brake ratchet assembly; The third rotating shaft is sequentially provided with a second gear and a third gear from left to right, the third gear is rotationally connected with the third rotating shaft, a fourth gear is arranged on the right side of the third gear, the fourth gear is slidably sleeved with the third gear, and the second gear is fixed with the third rotating shaft; The left end of the third rotating shaft is provided with a planetary reduction device between the winding drum assembly; The fourth rotating shaft is sequentially provided with a seventh gear, a sixth gear and a first gear set from left to right, the seventh gear is fixed with the fourth rotating shaft, the sixth gear is fixed with the fourth rotating shaft, the first gear set is rotatably connected with the fourth rotating shaft, and the first gear set is composed of a left gear a and a right gear b. The fifth transmission shaft is sequentially provided with a direction gear set and a gear set from left to right, the direction gear set is fixed with the fifth transmission shaft, the gear set is rotatably connected with the fifth transmission shaft, the direction gear set is composed of a left first direction gear and a right second direction gear, the gear set is composed of n gear sets, n≥2, and the fifth transmission shaft is connected with the power device. The first rotating shaft is provided with a direction sliding gear for controlling the reversing of the winding drum and a gear sliding gear set for controlling the gear shifting, and the gear sliding gear set is composed of n sliding gears capable of being engaged with the gear set one by one. The gear set is engaged with the gear b, the gear a is engaged with the fourth gear, the third gear is engaged with the sixth gear, and the second gear is engaged with the seventh gear.

[0007] The above-mentioned electric mechanical winch, the direction sliding gear is located on the right side of the gear sliding gear set, and the direction sliding gear and the gear sliding gear set are movably connected with the first rotating shaft. The direction sliding gear and the direction gear set are provided with a reverse intermediate gear, the reverse intermediate gear is engaged with the first direction gear, when the sliding gear moves to the left side, the direction sliding gear is engaged with the reverse intermediate gear, when the sliding gear moves to the right side, the direction sliding gear is disengaged from the reverse intermediate gear and engaged with the second direction gear.

[0008] The above-mentioned electric mechanical winch, the brake gear assembly is composed of a brake shaft, a brake gear device and a brake gear, the brake shaft is located above the third rotating shaft, the brake gear device is located on the brake shaft; the brake gear is located on the left side of the fourth gear, the brake gear is sleeved with the third gear, the brake gear can rotate around the shaft of the third gear, the brake gear is provided with a brake friction plate on the left side, the brake gear is provided with a dynamic brake plate on the right side, the brake friction plate on the left side of the brake gear is fixed with the third gear, the dynamic brake plate is fixed with the fourth gear, and the brake gear is engaged with the brake gear device.

[0009] The above-mentioned electric mechanical winch, the planetary reduction device has an inner ring gear, a plurality of planetary gears and a sun gear, the left end of the third rotating shaft is coaxially fixed with the sun gear, and the inner ring gear is coaxially fixed with the winding drum.

[0010] The above-mentioned electric mechanical winch, the right side of the first gear set is provided with a shaft coupling brake device for braking the first gear set, so as to assist the braking of the transmission system.

[0011] The power mechanical winch, the direction sliding gear can be moved along the first rotating shaft through the reversing handle, and the gear sliding gear set can be moved along the first rotating shaft through the gear shifting handle.

[0012] The power mechanical winch further comprises a chassis and a supporting device, the power device and the transmission system are installed on the chassis, and the supporting device is used for supporting the drum.

[0013] The power mechanical winch, the power device adopts the F186 electric starting diesel engine with high efficiency and energy saving.

[0014] The power mechanical winch, the right end of the fifth transmission shaft is connected with the power device through the torque coupling.

[0015] The power mechanical winch, the drum is made of high-quality alloy steel.

[0016] The power mechanical winch has the following beneficial effects: 1. In addition to the second rotating shaft for braking and the first rotating shaft for reversing and gear shifting, three transmission shafts are arranged, and corresponding gears on the three transmission shafts make the output more stable, the transmission ratio larger and the torque greater.

[0017] 2. The power transmission efficiency is improved: the high-efficiency energy-saving diesel engine and the planetary reducer structure combined with the gear box reduce the energy loss in the power transmission process, improve the power transmission efficiency, and reduce the construction cost.

[0018] 3. The operation convenience is enhanced: through the handle operation, the operator can easily realize various operations of the winch, reduce the requirement for the operator's skills, and improve the construction efficiency.

[0019] 4. The maintenance is simplified: the structure of each component is reasonable, easy to disassemble and install, convenient for maintenance work, and reduces the maintenance time and cost. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the internal structure sectional view of the embodiment of the present application.

[0021] Figure 2 is the transmission trend chart of the reverse I gear (slow gear) of the embodiment of the present application.

[0022] Figure 3 is the transmission trend chart of the reverse II gear (middle gear) of the embodiment of the present application.

[0023] Figure 4 is the transmission trend chart of the reverse III gear (fast gear) of the embodiment of the present application.

[0024] Figure 5 is the transmission trend chart of the brake gear of the embodiment of the present application.

[0025] Figure 6 is the transmission trend chart of the forward gear I (slow gear) of the embodiment of the present application.

[0026] Figure 7 is the transmission trend chart of the forward gear II (medium gear) of the embodiment of the present application.

[0027] Figure 8 is the transmission trend chart of the forward gear III (fast gear) of the embodiment of the present application.

[0028] In the figure, the corresponding figure names of the reference numerals are as follows: 1. power device, 2. torque coupling, 3. first rotating shaft, 4. gear shift gear set, 401. first gear shift gear, 402. second gear shift gear, 403. third gear shift gear, 5. direction shift gear, 6. reversing handle, 7. gear shifting handle, 8. direction gear set, 801. first direction gear, 802. second direction gear, 9. gear gear set, 901. first gear gear, 902. second gear gear, 903. third gear gear, 10. winding drum, 11. reduction box body, 12. second rotating shaft, 14. brake ratchet device, 15. second gear, 16. third gear, 17. brake gear, 18. fourth gear, 19. third rotating shaft, 20. planetary reduction gear set, 21. brake friction plate, 23. fourth rotating shaft, 24. sixth gear, 25. seventh gear, 26. first gear set, 2601. gear a, 2602. gear b, 28. fifth transmission shaft. DETAILED DESCRIPTION

[0029] Embodiment: as Figure 1 A power mechanical winch has a power device 1, a transmission system, a winding drum 10, a chassis and a supporting device, the power device 1 and the transmission system are installed on the chassis, and the supporting device is used for supporting the winding drum 10. The power device 1 adopts a high-efficiency energy-saving F186 electric starting diesel engine. The transmission system has a reduction box body 11, and the reduction box body 11 is sequentially provided with a brake shaft 12, a third rotating shaft 19, a fourth rotating shaft 23, a fifth transmission shaft 28 and a first rotating shaft 3 from top to bottom. The brake shaft 12 is provided with a brake ratchet device 14. The third rotating shaft 19 is sequentially provided with the second gear 15 and the third gear 16 from left to right, the third gear 16 is in rotating connection with the third rotating shaft 19, the right side of the third gear 16 is sequentially provided with a brake gear 17 and a fourth gear 18, the brake gear 17 and the fourth gear 18 are respectively sleeved with the third gear 16, the brake gear 17 can rotate around the shaft of the third gear 16, and the fourth gear 18 can slide left and right along the third gear 16, the left side of the brake gear 17 is provided with a brake friction plate 21, the right side of the brake gear 17 is provided with a dynamic brake pad, the brake friction plate 21 on the left side of the brake gear 17 is fixed with the third gear 16, the second gear 15 is fixed with the third rotating shaft 19, the dynamic brake pad is fixed with the fourth gear 18, and the brake gear 17 is engaged with the brake ratchet device 14; The left end of the third rotating shaft 19 and the winding drum assembly are provided with a planetary reduction device, the planetary reduction device has an inner ring gear, a plurality of planetary gears and a sun gear, the left end of the third rotating shaft 19 is coaxially fixed with the sun gear, and the inner ring gear is coaxially fixed with the winding drum 10; The fourth rotating shaft 23 is sequentially provided with the seventh gear 25, the sixth gear 24 and the first gear set 26 from left to right, the seventh gear 25 is fixed with the fourth rotating shaft 23, the sixth gear 24 is fixed with the fourth rotating shaft 23, and the first gear set 26 is in rotating connection with the fourth rotating shaft 23, the first gear set 26 is composed of a left gear a2601 and a right gear b2602, and the right side of the first gear set 26 is provided with a shaft coupling brake device for braking the first gear set 26, so as to assist the brake of the transmission system; The fifth transmission shaft 28 is sequentially provided with the direction gear set 8 and the gear position gear set 9 from left to right, the direction gear set 8 is fixed with the fifth transmission shaft 28, the gear position gear set 9 is in rotating connection with the fifth transmission shaft 28, the direction gear set 8 is composed of a left first direction gear 801 and a right second direction gear 802, the gear position gear set 9 is composed of a left first gear position gear 901, a middle second gear position gear 902 and a right third gear position gear 903, and the right end of the fifth transmission shaft 28 is connected with the power device 1 through the torque coupling 2; The first rotating shaft 3 is sequentially provided with the direction sliding gear 5 and the gear position sliding gear set 4 from left to right, the gear position sliding gear set 4 is composed of a right first gear position sliding gear 401, a middle second gear position sliding gear 402 and a left third gear position sliding gear 403, the direction sliding gear 5 can move along the first rotating shaft 3 through the reversing handle 6, and the gear position sliding gear set 4 can move along the first rotating shaft 3 through the gear shifting handle 7; A reverse intermediate gear is arranged between the direction sliding gear 5 and the direction gear set 8, and the reverse intermediate gear is engaged with the first direction gear 801. When the sliding gear 5 moves to the left side, the direction sliding gear 5 can be engaged with the reverse intermediate gear. When the sliding gear 5 moves to the right side, the direction sliding gear 5 can be disengaged from the reverse intermediate gear and engaged with the second direction gear 802. The third gear sliding gear 403 can be engaged with the first gear gear 901, the second gear sliding gear 402 can be engaged with the second gear gear 902, and the first gear sliding gear 401 can be engaged with the third gear gear 903. The second gear gear 902 is engaged with the gear b2602, the gear a2601 is engaged with the fourth gear 18, the third gear 16 is engaged with the sixth gear 24, and the second gear 15 is engaged with the seventh gear 25.

[0030] Working principle: As Figure 6 , when working in the forward I (slow) gear, the reversing handle 6 is used to move the second direction gear 802 to the right to engage with the direction sliding gear 5, and the gear handle 7 is used to engage the first gear sliding gear 401 with the third gear gear 903. The diesel engine drives the fifth transmission shaft 28 to rotate, and the fifth transmission shaft 28 drives the first direction gear 801 of the direction gear set 8 to rotate. The second direction gear 802 drives the direction sliding gear 5 to rotate, and the direction sliding gear 5 drives the first rotating shaft 3 to rotate. The first rotating shaft 3 drives the gear sliding gear set 4 to rotate, and the first gear sliding gear 401 drives the third gear gear 903 to rotate. The second gear gear 902 drives the gear b2602 to rotate, the gear a2601 drives the fourth gear 18 to rotate, the third gear 16 drives the sixth gear 24 to rotate, the seventh gear 25 drives the second gear 15 to rotate, the second gear 15 drives the third rotating shaft 19 to rotate, and the third rotating shaft 19 drives the sun gear to rotate. The sun gear drives the planet wheel to rotate, the planet wheel drives the inner ring to rotate, and the inner ring drives the drum 10 to rotate.

[0031] As Figure 7, the forward Ⅲ (fast) gear is used, the second direction gear 802 is moved to the right to engage with the direction sliding gear 5 by using the reversing handle 6, the third gear sliding gear 403 is engaged with the first gear gear 901 by using the gear handle 7, the diesel engine drives the fifth transmission shaft 28 to rotate, the fifth transmission shaft 28 drives the first direction gear 801 of the direction gear set 8 to rotate, the second direction gear 802 drives the direction sliding gear 5 to rotate, the direction sliding gear 5 drives the first rotating shaft 3 to rotate, the first rotating shaft 3 drives the gear sliding gear set 4 to rotate, the third gear sliding gear 403 drives the first gear gear 901 to rotate, the second gear gear 902 drives the gear b2602 to rotate, the gear a2601 drives the fourth gear 18 to rotate, the third gear 16 drives the sixth gear 24 to rotate, the seventh gear 25 drives the second gear 15 to rotate, the second gear 15 drives the third rotating shaft 19 to rotate, the third rotating shaft 19 drives the sun gear to rotate, the sun gear drives the planetary gear to rotate, the planetary gear drives the inner ring gear to rotate, and the inner ring gear drives the drum 10 to rotate.

[0032] As Figure 8 , the forward Ⅲ (fast) gear is used, the second direction gear 802 is moved to the right to engage with the direction sliding gear 5 by using the reversing handle 6, the third gear sliding gear 403 is engaged with the first gear gear 901 by using the gear handle 7, the diesel engine drives the fifth transmission shaft 28 to rotate, the fifth transmission shaft 28 drives the first direction gear 801 of the direction gear set 8 to rotate, the second direction gear 802 drives the direction sliding gear 5 to rotate, the direction sliding gear 5 drives the first rotating shaft 3 to rotate, the first rotating shaft 3 drives the gear sliding gear set 4 to rotate, the third gear sliding gear 403 drives the first gear gear 901 to rotate, the second gear gear 902 drives the gear b2602 to rotate, the gear a2601 drives the fourth gear 18 to rotate, the third gear 16 drives the sixth gear 24 to rotate, the seventh gear 25 drives the second gear 15 to rotate, the second gear 15 drives the third rotating shaft 19 to rotate, the third rotating shaft 19 drives the sun gear to rotate, the sun gear drives the planetary gear to rotate, the planetary gear drives the inner ring gear to rotate, and the inner ring gear drives the drum 10 to rotate.

[0033] As Figure 2, when the reverse Ⅰ (slow) is used, the first direction gear 801 is moved to the left and engaged with the reverse intermediate gear by using the reverse handle 6, the first gear shift gear 401 is engaged with the third gear by using the gear shift handle 7, the diesel engine drives the fifth transmission shaft 28 to rotate, the fifth transmission shaft 28 drives the first direction gear 801 of the direction gear set 8 to rotate, the first direction gear 801 drives the reverse intermediate gear to rotate, the reverse intermediate gear drives the direction shift gear 5 to rotate reversely, the direction shift gear 5 drives the first rotating shaft 3 to rotate reversely, the first rotating shaft 3 drives the gear shift gear set 4 to rotate reversely, the first gear shift gear 401 drives the third gear to rotate reversely, the second gear 902 drives the gear b2602 to rotate reversely, the gear a2601 drives the fourth gear 18 to rotate reversely, the third gear 16 drives the sixth gear 24 to rotate reversely, the seventh gear 25 drives the second gear 15 to rotate reversely, the second gear 15 drives the third rotating shaft 19 to rotate reversely, the third rotating shaft 19 drives the sun gear to rotate reversely, the sun gear drives the planet gear to rotate reversely, the planet gear drives the inner ring gear to rotate reversely, and the inner ring gear drives the winding drum 10 to rotate reversely.

[0034] As Figure 3 , when the reverse Ⅱ (medium) is used, the first direction gear 801 is moved to the left and engaged with the reverse intermediate gear by using the reverse handle 6, the second gear shift gear 402 is engaged with the second gear by using the gear shift handle 7, the diesel engine drives the fifth transmission shaft 28 to rotate, the fifth transmission shaft 28 drives the first direction gear 801 of the direction gear set 8 to rotate, the first direction gear 801 drives the reverse intermediate gear to rotate, the reverse intermediate gear drives the direction shift gear 5 to rotate reversely, the direction shift gear 5 drives the first rotating shaft 3 to rotate reversely, the first rotating shaft 3 drives the gear shift gear set 4 to rotate reversely, the second gear shift gear 402 drives the second gear to rotate reversely, the second gear 902 drives the gear b2602 to rotate reversely, the gear a2601 drives the fourth gear 18 to rotate reversely, the third gear 16 drives the sixth gear 24 to rotate reversely, the seventh gear 25 drives the second gear 15 to rotate reversely, the second gear 15 drives the third rotating shaft 19 to rotate reversely, the third rotating shaft 19 drives the sun gear to rotate reversely, the sun gear drives the planet gear to rotate reversely, the planet gear drives the inner ring gear to rotate reversely, and the inner ring gear drives the winding drum 10 to rotate reversely.

[0035] As Figure 4, when the reverse III (fast) is used, the first direction gear 801 is engaged with the reverse intermediate gear by using the reverse handle 6, the third gear shift gear 403 is engaged with the first gear by using the gear shift handle 7, the diesel engine drives the fifth transmission shaft 28 to rotate, the fifth transmission shaft 28 drives the first direction gear 801 of the direction gear set 8 to rotate, the first direction gear 801 drives the reverse intermediate gear to rotate, the reverse intermediate gear drives the direction shift gear 5 to rotate reversely, the direction shift gear 5 drives the first rotating shaft 3 to rotate reversely, the first rotating shaft 3 drives the gear shift gear set 4 to rotate reversely, the third gear shift gear 403 drives the first gear 901 to rotate reversely, the second gear 902 drives the gear b2602 to rotate reversely, the gear a2601 drives the fourth gear 18 to rotate reversely, the third gear 16 drives the sixth gear 24 to rotate reversely, the seventh gear 25 drives the second gear 15 to rotate reversely, the second gear 15 drives the third rotating shaft 19 to rotate reversely, the third rotating shaft 19 drives the sun gear to rotate reversely, the sun gear drives the planet gear to rotate reversely, the planet gear drives the inner ring to rotate reversely, and the inner ring drives the drum 10 to rotate reversely.

[0036] As Figure 5 When braking is needed, the brake gear 17 is in friction with the brake friction plates 21 and the dynamic brake friction plate on both sides, so that the fourth gear 18 is braked, thereby braking the entire power device 1, and the first gear set 26 is braked through the shaft coupling brake device, thereby assisting the braking of the transmission system.

[0037] The F186 electric start diesel engine with high efficiency and energy saving is used as the power source. The diesel engine has the advantages of large power, stable speed, good starting performance, etc., and can provide sufficient and stable power for the winching operation. The diesel engine is connected with the transmission system through the torque coupling, effectively reducing the vibration and impact in the power transmission process, and improving the stability and reliability of the power transmission. The high-precision and large-torque planetary reducer structure is externally connected to the gear reducer, which has the characteristics of large transmission ratio, high efficiency, small size and light weight. The power output by the diesel engine is transmitted to the drum assembly through the transmission shaft after being reduced and increased in torque. The transmission shaft is made of high-strength alloy steel, which has good wear resistance and fatigue resistance, ensuring the efficiency and reliability of power transmission.

[0038] The drum is made of high-quality alloy steel and has a special surface treatment, which has high hardness and wear resistance, and can effectively prevent the cable from damaging the surface of the drum during winding.

[0039] One side of the drum is supported by the triangular support device to support the grinding core and disperse the stress, protecting the stress of the drum shaft.

[0040] The undercarriage is redesigned by welding channel steel to raise the height of the undercarriage, increasing the convenience of forklift transportation.

[0041] The present application has the following beneficial effects: 1. In addition to the second rotating shaft 12 for braking and the first rotating shaft 3 for reversing and shifting, three transmission shafts are arranged, and through corresponding gears on the three transmission shafts, the output is more stable, the transmission ratio is larger, and the torque is larger.

[0042] 2. The power transmission efficiency is improved: the combination of high-efficiency energy-saving diesel engine and gear box with planetary reducer structure reduces the energy loss in the power transmission process, improves the power transmission efficiency, and reduces the construction cost.

[0043] 3. The operation convenience is enhanced: through handle operation, the operator can easily realize various operations of the winch, reduces the requirement for the operator's skill, and improves the construction efficiency.

[0044] 4. The maintenance is simplified: the structure of each component is reasonable, easy to disassemble and install, convenient for maintenance work, and reduces the maintenance time and cost.

[0045] The above-mentioned embodiments are only preferred technical solutions of the present application, and should not be regarded as limitations of the present application. The protection scope of the present application should be based on the technical solutions recited in the claims, including the equivalent replacement solutions of the technical features recited in the claims as the protection scope. That is, the equivalent replacement improvements within this range are also within the protection scope of the present application.

[0046] In the description of the present application, it should be noted that the positions or location relationships indicated by the terms "intermediate", "upper", "lower", "left", "right" and the like are based on the positions or location relationships shown in the drawings, or the positions or location relationships of the present application product when it is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and the like are only used for differentiation, and cannot be understood as indicating or implying relative importance.

[0047] The above-mentioned embodiments are only preferred technical solutions of the present application, and should not be regarded as limitations of the present application. The protection scope of the present application should be based on the technical solutions recited in the claims, including the equivalent replacement solutions of the technical features recited in the claims as the protection scope. That is, the equivalent replacement improvements within this range are also within the protection scope of the present application.

Claims

1. A power mechanical winch, comprising a power device, a transmission system and a drum (10); characterized in that The transmission system has a reduction gearbox (11), and the third rotating shaft (19), the fourth rotating shaft (23), the fifth transmission shaft (28) and the first rotating shaft (3) are sequentially arranged in the reduction gearbox (11) from top to bottom, and the transmission system is braked by a brake ratchet assembly; The second gear (15) and the third gear (16) are sequentially arranged on the third rotating shaft (19) from left to right, the third gear (16) is rotationally connected with the third rotating shaft (19), a fourth gear (18) is arranged on the right side of the third gear (16), the fourth gear (18) is slidably sleeved with the third gear (16), and the second gear (15) is fixed with the third rotating shaft (19); A planetary reduction device is arranged between the left end of the third rotating shaft (19) and the drum assembly; The seventh gear (25), the sixth gear (24) and the first gear set (26) are sequentially arranged on the fourth rotating shaft (23) from left to right, the seventh gear (25) is fixed with the fourth rotating shaft (23), the sixth gear (24) is fixed with the fourth rotating shaft (23), the first gear set (26) is rotationally connected with the fourth rotating shaft (23), and the first gear set (26) is composed of a left gear a (2601) and a right gear b (2602); The direction gear set (8) and the gear position gear set (9) are sequentially arranged on the fifth transmission shaft (28) from left to right, the direction gear set (8) is fixed with the fifth transmission shaft (28), the gear position gear set (9) is rotationally connected with the fifth transmission shaft (28), the direction gear set (8) is composed of a left first direction gear (801) and a right second direction gear (802), the gear position gear set (9) is composed of n gear position gears, n≥2, and the fifth transmission shaft (28) is connected with the power device; The first rotating shaft (3) is provided with a direction sliding gear (5) for controlling the reversing of the drum (10) and a gear position sliding gear set (4) for controlling the gear shifting, and the gear position sliding gear set (4) is composed of n gear position sliding gears capable of meshing with the gear position gears one by one; The gear position gear set (9) is meshed with the gear b (2602), the gear a (2601) is meshed with the fourth gear (18), the third gear (16) is meshed with the sixth gear (24), and the second gear (15) is meshed with the seventh gear (25).

2. An electric power winch as claimed in claim 1, characterized in that: The direction sliding gear (5) is located on the right side of the gear position sliding gear set (4), and the direction sliding gear (5) and the gear position sliding gear set (4) are movably connected with the first rotating shaft (3); A reverse intermediate gear is arranged between the direction sliding gear (5) and the direction gear set (8), the reverse intermediate gear is meshed with the first direction gear (801), when the sliding gear (5) moves to the left side, the direction sliding gear (5) is meshed with the reverse intermediate gear, when the sliding gear (5) moves to the right side, the direction sliding gear (5) is disengaged from the reverse intermediate gear and is meshed with the second direction gear (802).

3. An electric power winch as claimed in claim 2, characterised in that: The brake ratchet assembly is composed of a brake shaft (12), a brake ratchet device (14) and a brake gear (17), the brake shaft (12) is above the third rotating shaft (19), the brake ratchet device (14) is on the brake shaft (12); The brake gear (17) is on the left side of the fourth gear (18), the brake gear (17) is sleeved with the third gear (16), the brake gear (17) can rotate around the shaft of the third gear (16), the brake gear (17) is provided with a brake friction plate (21) on the left side, the brake gear (17) is provided with a dynamic brake plate on the right side, the brake friction plate (21) on the left side of the brake gear (17) is fixed with the third gear (16), the dynamic brake plate is fixed with the fourth gear (18), the brake gear (17) is engaged with the brake ratchet device (14).

4. An electric power winch as claimed in claim 3, characterised in that: The planetary reduction device has an inner ring gear, a plurality of planetary gears and a sun gear, the left end of the third rotating shaft (19) is coaxially fixed with the sun gear, the inner ring gear is coaxially fixed with the winding drum (10).

5. An electric power winch as claimed in claim 4 wherein: The right side of the first gear set (26) is provided with a shaft coupling brake device.

6. An electric power winch as claimed in claim 5 wherein: The direction sliding gear (5) can be moved along the first rotating shaft (3) through a reversing handle (6), the gear sliding gear set (4) can be moved along the first rotating shaft (3) through a gear shifting handle (7).

7. An electric power winch as claimed in claim 6 wherein: The right end of the fifth transmission shaft (28) is connected with the power device through a torque coupling (2).

8. An electric power winch as claimed in claim 7, characterised in that: A chassis and a supporting device for supporting the winding drum (10) are further provided, the power device and the transmission system are installed on the chassis.

9. An electric power winch as claimed in claim 8, characterised in that: The power device adopts an F186 electric start diesel engine.

10. An electric power winch as claimed in claim 9, characterised in that: The winding drum (10) is cast by high-quality alloy steel.

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