Turning gear structure capable of avoiding tripping

Abstract

The utility model discloses a turning structure capable of avoiding tripping, which is characterized in that a driving shaft and a transmission shaft which are in transmission connection are rotatably connected in a shell, the transmission shaft is in transmission connection with a turning rotor shaft fixed with a turning bull gear, the transmission shaft is provided with a turning pinion, and a swing rod used for driving the turning pinion to axially move is arranged in the shell. One end of the swing rod is connected with the shell through a swing shaft, the other end of the swing rod is connected with the small turning gear, an annular positioning groove is formed in the side, located on the gear ring, of the small turning gear, the swing rod is provided with a positioning head matched with the annular positioning groove, and a swing rod driving device of the swing shaft is fixed outside the shell. Known from the structure, according to the barring structure capable of avoiding tripping, the acting force of the barring bull gear on the barring pinion enables the barring pinion to move in the direction facing the barring bull gear and the axial direction of the transmission shaft along the spiral convex lines, it is guaranteed that the barring pinion and the barring bull gear can be in complete contact transmission all the time, tripping is avoided, and the barring structure capable of avoiding tripping is safe and reliable. Therefore, the service life of the small turning gear and the large turning gear is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of a cranking gear of a gas-steam combined cycle single-shaft unit, in particular to a cranking gear structure for avoiding tripping. Background Art

[0002] In the prior art, the cranking pinion and the drive shaft are circumferentially fixed by a key. However, since the force transmitted between the cranking pinion and the cranking gear is relatively large during the cranking process, and since the torque borne by the cranking pinion and the drive shaft is consistent, the force borne by the key connecting the cranking pinion and the drive shaft will be even greater. In addition, the force borne during cranking is relatively large, and when the ring gear of the cranking pinion and the cranking gear are cranking, there will inevitably be a surge of the gas turbine and the steam turbine, which will cause damage to the key and keyway of the cranking pinion and the drive shaft, and may even cause the transmission to become loose. The driving shaft bends, which directly causes wear on the transmission shaft and bearings or other connecting parts, and even causes interference in the transmission process of the worm gear, resulting in severe wear on the worm gear tooth surface and sintering on the worm gear surface; and when the turning pinion moves axially relative to the transmission shaft, the turning pinion gear ring will have a period of incomplete contact with the turning gear, but the torque and force will not decrease at this time. The reduction in contact area leads to increased stress, which in turn leads to increased wear on the tooth surface of the turning pinion gear ring or the tooth surface of the turning gear, and a shorter service life.

[0003] After research, it was found that this was because the power of the winch drive motor was large, resulting in a relatively fast speed during the winch process, which caused the winch pinion to move axially with the drive shaft, resulting in incomplete contact between the winch pinion and the winch gear. This caused the gear tooth surface wear to intensify during the transmission process. After the gear was worn, the winch pinion and the winch gear could not fully engage even if their axial positions were completely corresponding, and even interference might occur when the teeth engaged, which resulted in additional force in the transmission process, resulting in greater stress in the connection between the gear and the drive shaft, and even lateral force on the drive shaft, which caused the connection key and keyway between the winch pinion and the drive shaft to deform, and even the drive shaft to bend and deform, which caused bearing wear and interference in the transmission between the worm gear and worm, which caused the tooth surface of the worm wheel to gnaw and the worm to sinter.

[0004] For this reason, the applicant used a smaller-power cranking gear drive motor. However, since the cranking gear of the gas-steam combined cycle single-shaft unit requires a large power, the smaller-power cranking gear drive motor was unable to drive the cranking gear, and even the smaller-power cranking gear burned out directly.

[0005] This means that the applicant can only change back to the drive motor with the previous power. However, how to avoid the disengagement of the small cranking gear and the large cranking gear during normal cranking is a technical problem that the applicant urgently needs to solve. Utility Model Content

[0006] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a winch structure that avoids disengagement, wherein the winch structure is connected to the winch pinion by adopting a spiral convex pattern, and the force exerted by the winch gear on the winch pinion causes the winch pinion to move axially along the spiral convex pattern toward the winch gear and the transmission shaft, thereby ensuring that the winch pinion can always be in full contact with the winch gear in the absence of other external forces, thereby avoiding the winch pinion from automatically disengaging from the winch gear during normal winching, thereby extending the service life of the winch pinion and the winch gear.

[0007] The technical solution adopted by this utility model is:

[0008] The winch structure for avoiding disengagement includes a shell, in which a driving shaft fixed coaxially with the winch drive motor and a transmission shaft connected to the driving shaft is rotatably connected. The driving shaft is connected to the winch rotor shaft fixed with the winch large gear through the transmission shaft, and the transmission shaft is provided with an axially adjustable winch pinion corresponding to the winch large gear. A rocker arm for driving the axial movement of the winch pinion is provided in the shell, one end of the rocker arm is swingingly connected to the shell through a rocking shaft, and the other end of the rocker arm is connected to the winch pinion, and the outer wall of the winch pinion is located on one side of the gear ring and is coaxially provided with an annular positioning groove, and the corresponding end of the rocker arm is provided with a positioning head matching the annular positioning groove, and the positioning head is correspondingly engaged in the annular positioning groove. The annular positioning groove is rotationally connected, and a rocker arm drive device of a rocking shaft is fixed outside the shell. The shell is also provided with a processor and an angle sensor for detecting the rotation angle of the rocking shaft. The angle sensor and the drive device are electrically connected to the processor respectively, and also include a switch electrically connected to the processor for controlling the forward and reverse start or stop of the rocker arm drive device. When the rocker arm drive device drives the rocker arm to drive the turning gear pinion to move axially to one end of the transmission shaft to the maximum stroke, the ring gear of the turning gear pinion reaches the maximum contact amount with the tooth width direction of the turning gear large gear. When the rocker arm drive device drives the rocker arm to drive the turning gear pinion to move axially to the other end of the transmission shaft to the maximum stroke, the ring gear of the turning gear pinion is separated from the turning gear large gear.

[0009] A further improvement of the present invention is that a plurality of spiral ridges are evenly arranged on the shaft body of the transmission shaft corresponding to the position of the turning gear pinion, and a spiral groove matching the spiral ridges is provided on the inner wall of the turning gear pinion in contact with the transmission shaft, and the force exerted by the turning gear wheel on the turning gear pinion causes the turning gear pinion to move axially along the spiral ridges toward the turning gear wheel and the transmission shaft.

[0010] A further improvement of the present invention is that the turning rotor shaft includes a turning rotor shaft A for connecting to the gas turbine and a turning rotor shaft B for connecting to the steam turbine, and the turning rotor shaft A and the turning rotor shaft B are fixedly connected coaxially.

[0011] A further improvement of the present invention is that the large gear of the turning gear is fixed to the connection between the turning gear rotor shaft A and the turning gear rotor shaft B.

[0012] A further improvement of the present invention is that the processor controls the action of the rocker arm drive device according to the rotation angle data of the swing shaft detected by the rotation angle sensor, so that when the turning pinion and the turning gear should be in the transmission state, the ring gear of the turning pinion and the turning gear in the tooth width direction reach the maximum contact amount, and when the turning pinion and the turning gear should be in the disengagement state, the ring gear of the turning pinion and the turning gear in the tooth width direction are completely separated.

[0013] A further improvement of the present invention is that it also includes a display device, which is electrically connected to the processor, and the display device displays whether the state between the turning gear pinion and the turning gear large gear is a transmission state or a disengagement state; according to the data of the angle sensor received by the processor, the display device displays the tooth width contact ratio between the turning gear pinion and the turning gear large gear.

[0014] A further improvement of the present invention is that a torque sensor for detecting the torsional torque of the swing shaft is further provided on the housing, the torque sensor is electrically connected to the processor, and the processor controls the switch action according to the torsional torque data of the swing shaft detected by the torque sensor.

[0015] A further improvement of the present invention is that a torque sensor for detecting the torsional torque of the swing shaft is also provided on the shell, and the torque sensor is electrically connected to the processor. The processor controls the switch action according to the torsional torque data of the swing shaft detected by the torque sensor, and the display device displays the torque of the swing shaft according to the data of the torque sensor received by the processor.

[0016] A further improvement of the present invention is that the drive shaft is coaxially provided with a worm, and the transmission shaft is provided with a worm wheel for matching transmission corresponding to the worm.

[0017] A further improvement of the present invention is that an oil pipe is further provided in the housing, the oil outlet of the oil pipe faces the turning gear pinion meshing with the turning gear, and the oil outlet of the oil pipe is located on the side of the turning gear pinion facing away from the turning gear.

[0018] The beneficial effects of the present invention are:

[0019] First, the winch structure of the present invention avoids disengagement, and adopts a spiral convex pattern to connect with the winch pinion. The force exerted by the winch gear on the winch pinion causes the winch pinion to move axially along the spiral convex pattern toward the winch gear and the transmission shaft, thereby ensuring that the winch pinion can always be in full contact with the winch gear in the absence of other external forces, avoiding the winch pinion from automatically disengaging from the winch gear during normal winching, thereby extending the service life of the winch pinion and the winch gear.

[0020] Second, the present invention has a winch structure that avoids disengagement. When the gas turbine or steam turbine is running, the processor will send a signal to the rocker drive device to actively disengage the winch pinion and the winch gear. At this time, the rocker drive device starts and drives the rocker arm to swing away from the winch gear, thereby causing the positioning head at the end of the rocker arm to drive the winch pinion to move along the spiral convex pattern in the direction away from the winch gear, so as to achieve complete disengagement of the winch pinion and the winch gear.

[0021] Third, the winch structure of the present invention avoids disengagement. After the disengagement is completed, the winch pinion is maintained at the end of the transmission shaft away from the winch gear under the action of the positioning head of the rocker arm. At this time, although the winch pinion has a tendency to move along the spiral ridges toward the winch gear due to the action of the spiral ridges, the positioning head limits the annular positioning groove of the winch pinion, so that the winch pinion can still be maintained in a disengaged state with the winch gear, and the rocker arm only needs to bear the axial force of the spiral ridges on the axial direction of the winch pinion.

[0022] Fourth, the winch structure of the present invention avoids disengagement. The angle sensor can detect the rotation angle of the swing axis of the rocker arm, thereby ensuring that the swing angle of the rocker arm can reach the preset requirements, and then ensuring that the winch pinion and the winch gear are fully contacted and transmitted or fully disengaged. It can also avoid the swing angle of the rocker arm being too large, which will cause the axial movement stroke of the winch pinion to be too large, thereby avoiding interference between the winch pinion and the other structures connected to the transmission shaft or unnecessary friction or stress.

[0023] Fifth, the present invention has a winch structure that avoids disengagement, and the torque sensor can also detect the torque borne by the swing shaft of the rocker arm, so that the corresponding force between the positioning head and the annular positioning groove of the winch pinion can be obtained, and then it can be judged and analyzed whether the winch pinion is in a normal state.

[0024] Sixth, the winch structure of the present invention that avoids tripping uses a variable frequency motor as the winch drive motor, so that the speed and power of the winch drive motor can be adjusted according to the feedback of the working status during winching, which not only reduces energy consumption, but also further avoids tripping between the winch pinion and the winch gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the main cross-section of the structure of this application.

[0026] Figure 2 This is a schematic diagram of the electrical connections of this application. DETAILED DESCRIPTION

[0027] Combine Figure 1 and Figure 2 It can be seen that the winch structure for avoiding tripping includes a shell 1, in which a driving shaft fixed coaxially with the winch drive motor and a transmission shaft 2 connected to the driving shaft are rotatably connected. The driving shaft is connected to the winch rotor shaft to which the winch gear 9 is fixed through the transmission shaft 2. The transmission shaft 2 is provided with an axially adjustable winch pinion 6 corresponding to the winch gear 9. A rocker arm 10 for driving the winch pinion 6 to move axially is provided in the shell 1. One end of the rocker arm 10 is swingably connected to the shell 1 through a rocking shaft 11, and the other end of the rocker arm 10 is connected to the winch pinion. The outer wall of the winch pinion 6 is located on one side of the ring gear 8 and is coaxially provided with an annular positioning groove 13. The corresponding end of the rocker arm 10 is provided with a positioning head 12 matching the annular positioning groove 13, and the positioning head 12 is relatively fixed in the annular positioning groove 13. The position slot 13 is rotationally connected, and a rocker drive device 15 of the rocking shaft 11 is fixed outside the shell 1. The shell 1 is also provided with a processor 16 and an angle sensor 18 for detecting the rotation angle of the rocking shaft 11. The angle sensor 18 and the drive device 15 are respectively electrically connected to the processor 16, and also include a switch 17 electrically connected to the processor 16 for controlling the forward and reverse start or stop of the rocker drive device 15. When the rocker drive device 15 drives the rocker rod 10 to drive the turning pinion 6 to move axially to the maximum stroke at one end of the transmission shaft 2, the ring gear 8 of the turning pinion 6 reaches the maximum contact amount with the turning gear 9 in the tooth width direction. When the rocker drive device 15 drives the rocker rod 10 to drive the turning pinion 6 to move axially to the other end of the transmission shaft 2 to the maximum stroke, the ring gear 8 of the turning pinion 6 is separated from the turning gear 9.

[0028] The shaft body of the transmission shaft 2 is evenly provided with multiple spiral ridges 7 at the position corresponding to the turning gear pinion 6. The inner wall of the turning gear pinion 6 in contact with the transmission shaft 2 is provided with a spiral groove matching the spiral ridges 7. The force exerted by the turning gear 9 on the turning gear pinion 6 causes the turning gear pinion 6 to move axially along the spiral ridges 7 toward the turning gear 9 and the transmission shaft 2.

[0029] The turning rotor shaft includes a turning rotor shaft A4 for driving connection with a gas turbine and a turning rotor shaft B5 for driving connection with a steam turbine. The turning rotor shaft A4 and the turning rotor shaft B5 are fixedly connected coaxially.

[0030] The barring gear 9 is fixed to the connection between the barring rotor shaft A4 and the barring rotor shaft B5.

[0031] The processor 16 controls the action of the rocker arm drive device 15 according to the rotation angle data of the swing shaft 11 detected by the rotation angle sensor 18. When the turning pinion 6 and the turning gear 9 should be in the transmission state, the ring gear 8 of the turning pinion 6 and the turning gear 9 in the tooth width direction reach the maximum contact amount. When the turning pinion 6 and the turning gear 9 should be in the disengaged state, the ring gear 8 of the turning pinion 6 and the turning gear 9 in the tooth width direction are completely separated.

[0032] It also includes a display device 19, which is electrically connected to the processor 16. The display device 19 displays whether the state between the turning gear pinion 6 and the turning gear large gear 9 is a transmission state or a disengagement state; according to the data of the angle sensor 18 received by the processor 16, the display device 19 displays the tooth width contact ratio between the turning gear pinion 6 and the turning gear large gear 9.

[0033] The housing 1 is further provided with a torque sensor 20 for detecting the torsional torque of the swing shaft 11 . The torque sensor 20 is electrically connected to the processor 16 . The processor 16 controls the operation of the switch 17 according to the torsional torque data of the swing shaft 11 detected by the torque sensor 20 .

[0034] The housing 1 is also provided with a torque sensor 20 for detecting the torsional torque of the swing shaft 11. The torque sensor 20 is electrically connected to the processor 16. The processor 16 controls the operation of the switch 17 according to the torsional torque data of the swing shaft 11 detected by the torque sensor 20. The display device 19 displays the torque of the swing shaft 11 according to the data of the torque sensor 20 received by the processor 16.

[0035] The driving shaft is coaxially provided with a worm, and the transmission shaft 2 is provided with a worm wheel 3 for matching transmission corresponding to the worm.

[0036] An oil pipe 14 is further provided in the housing 1 , the oil outlet of the oil pipe 14 faces the turning gear 6 meshing with the turning gear 9 , and the oil outlet of the oil pipe 14 is located on the side of the turning gear 6 facing away from the turning gear 9 .

[0037] The turning gear drive motor is a variable frequency motor.

[0038] In this embodiment, the rocker arm drive device 15 adopts the ZF-SV50W servo motor of Zhongzhi Electric, the processor 16 adopts the 80C51 single-chip microcomputer of Intel, the angle sensor 18 adopts the VTA83K20 hollow single-turn angle sensor of Shanxi Witson Technology, the torque sensor 20 adopts the NTJN-2 torque sensor of Nanjing Tianguang Electric Technology, and the switch 17 is the input device of the 80C51 single-chip microcomputer of Intel used by the processor 16. In addition, after the processor 16 sets the program parameters, it realizes the forward, reverse or stop of the rocker arm drive device 15 according to the signals of the angle sensor 18 and the torque sensor 20 during operation. The display device 19 adopts an LCD1602 liquid crystal display used in conjunction with the 80C51 single-chip microcomputer.

[0039] In the prior art, the turning pinion 6 and the drive shaft 2 are circumferentially fixed by a key. However, since the force transmitted between the turning pinion 6 and the turning gear 9 is relatively large during the turning process, and since the torque borne by the turning pinion 6 and the drive shaft 2 is consistent, the force borne by the key connecting the turning pinion 6 and the drive shaft 2 is even greater. In addition, the force borne during turning is relatively large, and when the ring gear 8 and the turning gear 9 of the turning pinion 6 are turning, there will inevitably be a surge of the gas turbine and the steam turbine, which will cause damage to the key and keyway of the turning pinion 6 and the drive shaft 2, and may even lead to This will cause the transmission shaft 2 to bend, which will directly lead to wear between the transmission shaft and the bearings or other connecting parts, and may even cause interference in the transmission process of the worm gear, resulting in serious wear of the worm gear tooth surface and sintering of the worm gear surface; and when the turning pinion 6 moves axially relative to the transmission shaft 2, the ring gear 8 of the turning pinion 6 will not be fully in contact with the turning gear 9 for a period of time, but the torque and the force will not be reduced at this time. The reduction in contact area will lead to increased stress, which will lead to increased wear of the tooth surface of the ring gear 8 of the turning pinion 6 or the tooth surface of the turning gear 9, and a shorter service life.

[0040] Therefore, the present application adopts the spiral ridge 7 to connect with the turning gear 6, and the force exerted by the turning gear 9 on the turning gear 6 causes the turning gear 6 to move axially along the spiral ridge 7 toward the turning gear 9 and the transmission shaft 2, thereby ensuring that the turning gear 6 can always be in full contact with the turning gear 9 for transmission in the absence of other external forces, thereby avoiding the turning gear 6 from automatically disengaging from the turning gear 9 during normal turning, thereby extending the service life of the turning pinion 6 and the turning gear 9. When the gas turbine or steam turbine is running, the processor 16 will send a signal to the rocker drive device 15 to actively disengage the turning gear pinion 6 and the turning gear 9. At this time, the rocker drive device 15 starts and drives the rocker 10 to swing away from the turning gear 9, thereby causing the positioning head 12 at the end of the rocker 10 to drive the turning gear pinion 6 to move along the spiral convex groove 7 away from the turning gear 9, so as to complete the disengagement of the turning gear pinion 6 and the turning gear 9. After the disengagement is completed, the turning gear pinion 6 is in the rocker The locating head 12 of the locating head 10 is held at the end of the transmission shaft 2 away from the turning gear 9. At this time, although the turning pinion 6 has a tendency to move along the spiral ridges 7 toward the turning gear 9 due to the action of the spiral ridges 7, the locating head 12 limits the annular locating groove 13 of the turning pinion 6, so that the turning pinion 6 can still remain in a state of disengagement from the turning gear. The rocker arm 10 only needs to withstand the axial force of the spiral ridges 7 on the turning pinion 6. In addition, the angle sensor 18 can detect the rotation angle of the swing shaft 11 of the rocker arm 10, thereby ensuring that the swing angle of the rocker arm 10 can meet the preset requirements, thereby ensuring that the turning pinion 6 and the turning gear 9 are fully in contact and transmission or fully disengaged. It can also prevent the rocker arm 10 from swinging too much and causing the axial movement of the turning pinion 6 to be too large, thereby preventing the turning pinion 6 from interfering with other structures connected to the transmission shaft 2 or generating unnecessary friction or stress. The torque sensor 20 can also detect the torque applied to the swing shaft 11 of the rocker arm 10, thereby correspondingly determining the force acting between the positioning head 12 and the annular positioning groove 13 of the barring gear pinion 6, thereby determining whether the barring gear pinion 6 is in a normal state. The processor 16 is also electrically connected to the barring gear drive motor, enabling the processor 16 to change the frequency and speed of the barring gear drive motor based on signals from the rotation angle sensor 18 and the torque sensor 20.

Claims

1. A winch structure that avoids tripping, characterized by: The invention comprises a housing (1), wherein a driving shaft fixed coaxially with a turning gear driving motor and a transmission shaft (2) connected to the driving shaft are rotatably connected in the housing (1), wherein the driving shaft is connected to a turning gear rotor shaft to which a turning gear large gear (9) is fixed via the transmission shaft (2), wherein the transmission shaft (2) is provided with an axially adjustable turning gear small gear (6) corresponding to the turning gear large gear (9), wherein a swing rod (10) for driving the axial movement of the turning gear small gear (6) is provided in the housing (1), wherein one end of the swing rod (10) is connected to the housing (1) in a swinging manner via a swing shaft (11), wherein the swing rod The other end of (10) is connected to the winch pinion, and the outer wall of the winch pinion (6) is located on one side of the gear ring (8) and is coaxially provided with an annular positioning groove (13), and the corresponding end of the swing rod (10) is provided with a positioning head (12) matching the annular positioning groove (13), and the positioning head (12) is rotatably connected relative to the annular positioning groove (13) in the annular positioning groove (13), and a swing rod driving device (15) of the swing shaft (11) is fixed outside the housing (1), and a processor (16) and an angle sensor for detecting the rotation angle of the swing shaft (11) are also provided on the housing (1). (18), the angle sensor (18) and the driving device (15) are electrically connected to the processor (16) respectively, and also include a switch (17) electrically connected to the processor (16) for controlling the forward and reverse start or stop of the swing rod driving device (15), when the swing rod driving device (15) drives the swing rod (10) to drive the winch pinion (6) to move axially to the maximum stroke facing one end of the transmission shaft (2), the gear ring (8) of the winch pinion (6) and the winch gear (9) reach the maximum contact amount in the tooth width direction, when the swing rod driving device (15) drives the swing rod (10) to drive the winch pinion When the wheel (6) moves axially to the maximum stroke facing the other end of the transmission shaft (2), the ring gear (8) of the turning gear (6) is separated from the turning gear (9); the shaft body of the transmission shaft (2) is evenly provided with a plurality of spiral ridges (7) corresponding to the position of the turning gear (6); the inner wall of the turning gear (6) in contact with the transmission shaft (2) is provided with a spiral groove matching the spiral ridges (7); the force exerted by the turning gear (9) on the turning gear (6) causes the turning gear (6) to move axially with the transmission shaft (2) along the spiral ridges (7) in the direction facing the turning gear (9).

2. The winch structure for preventing tripping according to claim 1, characterized in that: The turning rotor shaft comprises a turning rotor shaft A (4) for connecting to a gas turbine drive and a turning rotor shaft B (5) for connecting to a steam turbine drive. The turning rotor shaft A (4) and the turning rotor shaft B (5) are fixedly connected coaxially.

3. The winch structure for preventing tripping according to claim 2, characterized in that: The turning gear (9) is fixed to the connection between the turning rotor shaft A (4) and the turning rotor shaft B (5).

4. The winch structure for preventing tripping according to claim 1, characterized in that: The processor (16) controls the operation of the rocker drive device (15) according to the rotation angle data of the swing shaft (11) detected by the rotation angle sensor (18), so that when the turning gear (6) and the turning gear (9) are in the transmission state, the ring gear (8) of the turning gear (6) and the turning gear (9) reach the maximum contact amount in the tooth width direction; when the turning gear (6) and the turning gear (9) are in the disengagement state, the ring gear (8) of the turning gear (6) and the turning gear (9) are completely separated in the tooth width direction.

5. The winch structure for preventing tripping according to claim 1, characterized in that: The invention also includes a display device (19), which is electrically connected to the processor (16). The display device (19) displays whether the state between the turning gear pinion (6) and the turning gear large gear (9) is a transmission state or a release state; according to the data of the rotation angle sensor (18) received by the processor (16), the display device (19) displays the tooth width contact ratio between the turning gear pinion (6) and the turning gear large gear (9).

6. The winch structure for preventing tripping according to any one of claims 1 to 4, characterized in that: The housing (1) is further provided with a torque sensor (20) for detecting the torsional torque of the swing shaft (11). The torque sensor (20) is electrically connected to the processor (16). The processor (16) controls the operation of the switch (17) based on the torsional torque data of the swing shaft (11) detected by the torque sensor (20).

7. The winch structure for preventing tripping according to claim 5, characterized in that: The housing (1) is further provided with a torque sensor (20) for detecting the torsional torque of the swing shaft (11). The torque sensor (20) is electrically connected to the processor (16). The processor (16) controls the operation of the switch (17) based on the torsional torque data of the swing shaft (11) detected by the torque sensor (20). The display device (19) displays the torque of the swing shaft (11) based on the data of the torque sensor (20) received by the processor (16).

8. The winch structure for preventing tripping according to claim 1, characterized in that: The drive shaft is coaxially provided with a worm, and the transmission shaft (2) is provided with a worm wheel (3) for matching transmission corresponding to the worm.

9. The turning gear structure for preventing tripping according to claim 1, characterized in that: An oil pipe (14) is further provided in the housing (1), the oil outlet of the oil pipe (14) facing the turning gear pinion (6) meshing with the turning gear (9) for transmission, and the oil outlet of the oil pipe (14) is located on the side of the turning gear pinion (6) facing away from the turning gear (9).

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