CN113005799B - A cradle type strand twisting machine - Google Patents

Abstract

The invention discloses a cradle strander, which comprises a bottom plate, wherein two bearing seats are fixed on the bottom plate, a cradle frame and a main motor are rotatably arranged between the two bearing seats, and the main motor drives the cradle frame to rotate through a belt wheel mechanism and a brake disc; the inner wall of the front side edge of the cradle frame is rotatably provided with a guide wheel; a traction device consisting of a traction wheel and a traction motor is arranged behind the guide wheel in the cradle frame; a cable arranging device consisting of a cable arranging motor and a cable guiding frame is arranged on the cradle frame and positioned behind the traction device; a cable collecting device composed of a cable collecting disc and a cable collecting motor is arranged behind the cable arrangement device in the cradle frame. The invention has simple and reasonable structure, simple process adjustment and convenient use and maintenance. Stepless regulation can be realized, and the speed and the cable-winding force can be changed according to the change of the speed of the production line and the requirement of the cable-winding tension so as to adapt to the technological requirement.

Description

A cradle type strand twisting machine

Technical Field

The invention relates to the field of strand twisting machines, in particular to a cradle type strand twisting machine.

Background technique

With the development of shipping and fishery, as well as the large demand for ships and port facilities, the demand for ropes made of various synthetic fibers is increasing day by day. The existing twisting machine for twisting non-metallic cables adopts a traditional gear transmission structure, the cable twisting pitch cannot be adjusted steplessly, and the equipment runs slowly, with high noise and pollution. It is difficult to adjust the process when changing varieties (gears need to be replaced), and the production efficiency is low, which cannot meet the current needs of high-speed, high-efficiency, and multi-variety production.

Summary of the invention

The object of the present invention is to provide a cradle type strand twisting machine to solve the problem that the prior art strand twisting machine using a gear transmission structure cannot be adjusted steplessly.

In order to achieve the above object, the technical solution adopted by the present invention is:

A cradle-type stranding machine, comprising a bottom plate, characterized in that: two coaxial bearing seats are fixedly arranged on the bottom plate, a cradle frame is arranged between the two bearing seats, the front side of the cradle frame is used as a cable entry side facing one of the bearing seats, and the rear side of the cradle frame faces the other bearing seat, the front and rear sides of the cradle frame are respectively connected to a main shaft, and the main shafts of the front and rear sides are respectively coaxially rotatably installed in the bearing seats in corresponding directions, wherein the main shaft of the rear side of the cradle frame is coaxially fixedly connected to a brake disc, the brake disc is coaxially fixed with a pulley, a main motor is fixedly installed on the bottom plate, the output shaft of the main motor is coaxially fixedly installed with a pulley, and the pulley of the main motor is connected to the pulley fixed to the brake disc through a transmission belt.

A guide wheel is rotatably mounted on the inner wall of the front side of the cradle frame, and the axial direction of the guide wheel is horizontal and perpendicular to the bearing seat and the main shaft;

A traction device is installed behind the guide wheel in the cradle frame, and the traction device includes a first traction wheel located behind the guide wheel and rotatably installed on the cradle frame at a high position, a second traction wheel located behind the first traction wheel and rotatably installed on the cradle frame at a low position, and a traction motor fixed on the cradle frame, the axial directions of the first traction wheel and the second traction wheel are respectively horizontal and perpendicular to the bearing seat and the main shaft axial direction, the first traction wheel and the second traction wheel are respectively coaxially fixedly connected with pulleys, the pulleys of the first and second traction wheels are connected by a transmission belt, and the output shaft of the traction motor is connected by a transmission belt.

A cable arrangement device is installed on the cradle frame at the rear of the traction device, and the cable arrangement device includes a cable arrangement motor, a cable guide frame, and a screw slide mechanism. The screw slide mechanism includes a slide and a screw guide rail frame fixed on the cradle frame. A screw and a guide rod are rotatably installed in the screw guide rod frame. The axes of the screw and the guide rod are parallel to each other and are horizontally perpendicular to the axis of the bearing seat and the main shaft. The slide is coaxially screwed and assembled to the screw through a threaded through hole. At the same time, the slide is coaxially slidably assembled to the guide rod through a through hole. A pulley is also coaxially fixed to one axial end of the screw. The cable guide frame is fixed to the slide and moves as a whole; the cable arrangement motor is fixed to the cradle frame, and a pulley is coaxially fixed to the output shaft of the cable arrangement motor, and the pulley of the cable arrangement motor is connected to the pulley at the end of the screw through a transmission belt.

A cable winding device is installed in the cradle frame behind the cable arrangement device, and the cable winding device includes a cable winding motor and a cable winding drum rotatably installed in the cradle frame, the axial direction of the cable winding drum is horizontal and perpendicular to the bearing seat and the main shaft axis, the cable winding drum is coaxially fixedly connected with a pulley, the cable winding motor is fixed to the cradle frame, the output shaft of the cable winding motor is coaxially fixedly installed with a pulley, and the pulley of the cable winding motor is connected to the pulley of the cable winding drum through a transmission belt.

The cradle-type strand twisting machine is characterized in that a pneumatic brake is also installed on the bearing seat in the direction corresponding to the brake disc, and the pneumatic brake cooperates with the brake disc.

The cradle-type strand twisting machine is characterized in that a wheel frame is fixed on the inner wall of the front side of the cradle frame, the guide wheel is rotatably installed in the wheel frame, the wheel frame is also fixed with a first proximity switch, and the guide wheel is also fixed with a sensing block. When the guide wheel rotates, the sensing block causes the first proximity switch to generate a signal through the first proximity switch.

The cradle-type strand twisting machine is characterized in that: the cradle frame is respectively fixed with a traction wheel frame corresponding to each traction wheel position, and a traction wheel shaft is rotatably installed in the traction wheel frame, the first traction wheel and the second traction wheel are respectively coaxially fixed to the traction wheel shaft of the traction wheel frame at the corresponding position through an expansion connection sleeve, and the pulleys corresponding to the first and second traction wheels are respectively coaxially fixed on the traction wheel shaft where the first and second traction wheels are located, thereby realizing the coaxial fixed connection between the first and second traction wheels and the corresponding pulleys, and the output shaft of the traction motor is transmission-connected to one of the traction wheel shafts through a reducer.

The cradle-type stranding machine is characterized in that: in the cable arrangement device, second proximity switches are fixed at the axial ends of the screw rod and the guide rod in the screw rod guide rod frame, and the second proximity switch generates a signal when the slide moves close to any one of the second proximity switches.

The cradle-type stranding machine is characterized in that: in the cable arrangement device, the cable guide frame is composed of a support plate and two axially vertical guide rollers, the support plate is fixed on the slide of the screw slide mechanism, the two guide rollers are distributed side by side, and the lower end of each guide roller is rotatably connected to the support plate.

The cradle-type stranding machine is characterized in that: in the cable-collecting device, a rotating shaft is coaxially fixed to one end of the cable-collecting drum, the rotating shaft is rotatably connected to the corresponding side of the cradle frame, and the pulley corresponding to the cable-collecting drum is coaxially fixed to the rotating shaft, thereby realizing the coaxial connection between the cable-collecting drum and the corresponding pulley;

The cam is provided with a support sleeve which is coaxially fixed to the other end of the cable drum shaft, and a support shaft is coaxially installed in the support sleeve. The support shaft and the support sleeve only cooperate with each other for relative rotation. The end of the support shaft extends out from the sleeve opening of the support sleeve and is coaxially fixed to the support plate. The cradle frame is provided with a through hole on one side corresponding to the other end of the cable drum shaft, the through hole is coaxial with the support plate, a threaded sleeve is coaxially fixed in the through hole, and a movable sleeve is coaxially screwed and installed in the threaded sleeve. A top is fixedly connected to one end of the movable sleeve facing the support plate, and the top passes through the sleeve opening in the corresponding direction of the threaded sleeve. A groove is provided at the center of one side of the support plate facing the top, and the top is pushed into the groove of the support plate. The other end of the movable sleeve passes through the corresponding sleeve opening of the threaded sleeve, and a rotary handle is fixedly connected to the radial side of the other end of the movable sleeve.

The cradle-type stranding machine is characterized in that the main motor, traction motor, cable arrangement motor and cable collection motor are all AC variable frequency motors, and the main motor, traction motor, cable arrangement motor and cable collection motor are respectively controlled by a frequency converter controlled by a controller.

The cradle-type stranding machine is characterized in that: the controller is connected to the first proximity switch and the second proximity switch, the controller receives signals from the first and second proximity switches, and controls the main motor, traction motor, cable arrangement motor, and cable collection motor by controlling the inverter based on the signals from the first and second proximity switches.

Compared with the prior art, the advantages of the present invention are:

The present invention has a simple and reasonable structure, simple process adjustment, and convenient use and maintenance. In the present invention, the guide wheel, traction device, cable arrangement device, and cable collection device are integrally formed with the cradle frame, and can rotate synchronously under the drive of the main motor, which increases the rigidity of the equipment and the stability and reliability of operation. The main motor, traction motor, cable arrangement motor, and cable collection motor are all AC variable frequency motors, which are connected to their respective driving parts through a pulley transmission, thereby achieving stepless adjustment. Combined with the PLC controller, the PLC controller adjusts the speed through the frequency converter, and the process requirements of different varieties can be achieved under the premise of stepless adjustment.

When adjusting the product process, the basic parameters of the PLC controller are adjusted, and the PLC controller realizes automatic tracking and synchronization of various parts based on the signals of the first and second proximity switches, which is simple and convenient to operate. The meter counting function when feeding the cable can be realized based on the first proximity switch combined with the diameter of the guide wheel, and then the control of each motor can be realized according to the meter counting result; at the same time, the cable reversing function of the cable guide frame in the cable arrangement device can be realized based on the second proximity switch.

The traction motor of the present invention can change the speed of the traction cable by changing the rotation speed to meet the process requirements of the production line speed and the lay length of the twisted cable. The change of the lay length of cables with different diameters can be achieved by changing the rotation speed of the cable arrangement motor. The cable collection motor can change the speed and cable collection force according to the change of the production line speed and the cable collection tension requirements to meet the process requirements.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structural perspective view of the present invention when the cable drum is not installed.

FIG. 2 is a second structural perspective view of the present invention when the cable drum is not installed.

FIG. 3 is a side view of the overall structure of the present invention.

FIG. 4 is a top view of the overall structure of the present invention.

FIG. 5 is a schematic diagram of the structure of the guide wheel portion of the present invention.

FIG. 6 is a schematic diagram of the structure of the traction device of the present invention.

FIG. 7 is a schematic diagram of the structure of the cable arrangement device of the present invention.

FIG8 is a schematic diagram of the top structure of the present invention.

Detailed ways

The present invention is further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figures 1 to 4, a cradle-type stranding machine comprises a base plate 1, on which two coaxial bearing seats 2.1 and 2.2 are fixedly arranged, and a cradle frame 3 is arranged between the two bearing seats 2.1 and 2.2. The front side of the cradle frame 3 is used as the bearing seat 2.1 facing the front side on the cable entry side, and the rear side of the cradle frame 3 is facing the bearing seat 2.2 on the rear side. The front and rear sides of the cradle frame 3 are respectively connected with a main shaft, and the main shafts on the front and rear sides are respectively coaxially rotatably installed in the bearing seats 2.1 and 2.2 in the corresponding directions, wherein the main shaft on the rear side of the cradle frame 3 is coaxially fixedly connected with a brake disc 4, and a protruding pulley is coaxially fixed at the center of the rear side disk surface of the brake disc 4, and a main motor 5 is fixedly installed at the rear position of the bearing seat 2.2 on the rear side of the base plate 1, and a pulley is coaxially fixedly installed on the output shaft of the main motor 5, and the pulley of the main motor 5 is connected to the pulley fixed to the brake disc 4 through a transmission belt 6. Pneumatic brakes 7 are installed on the left and right sides of the brake disc 4 on the rear bearing seat 2.2. The pneumatic brakes 7 cooperate with the brake disc 4 respectively. Specifically, the pneumatic source in the pneumatic brakes 7 drives the brake pads to clamp the brake pads 4 to realize the braking function.

A wheel frame 8 is fixed to the inner wall of the front side of the cradle frame 1, and a guide wheel 9 is rotatably installed in the wheel frame 8. The axial direction of the guide wheel 9 is perpendicular to the bearing seat and the main shaft axial direction, that is, the axial direction of the guide wheel 9 is along the left and right horizontal direction. As shown in FIG. 5 , the wheel frame 8 is also fixed with a first proximity switch 10, and the guide wheel 9 is also fixed with a sensor block 11. When the guide wheel 9 rotates, the sensor block 11 causes the first proximity switch 10 to generate a signal through the first proximity switch 10.

A traction device is installed behind the guide wheel 9 in the cradle frame 1. The traction device includes a first traction wheel frame located behind the guide wheel 9 and fixed to the top of the cradle frame 1, and a second traction wheel frame located behind the first traction wheel frame and fixed to the bottom of the cradle frame 1. A first traction wheel shaft is rotatably installed in the first traction wheel frame, and a second traction wheel shaft is rotatably installed in the second traction wheel frame. The traction device also includes a first traction wheel 12.1, a second traction wheel 12.2, and a traction motor 13. The first traction wheel 12.1 and the second traction wheel 12.2 are coaxially fixed to the traction wheel shaft of the traction wheel frame at the corresponding position through a tightening sleeve, thereby realizing the high-position rotation installation of the first traction wheel 12.1 and the low-position rotation installation of the second traction wheel 12.2. The outer circumferences of the first traction wheel 12.1 and the second traction wheel 12.2 are respectively provided with multiple annular grooves for embedding cables. The axial directions of the first traction wheel shaft, the second traction wheel shaft, the first traction wheel 12.1, and the second traction wheel 12.2 are all along the left and right horizontal directions.

As shown in FIG6 , the first traction wheel shaft and the second traction wheel shaft are coaxially fixedly installed with pulleys, respectively, so that the first and second traction wheels 12.1 and 12.2 are coaxially fixedly connected with the corresponding pulleys. The pulleys of the first and second traction wheels 12.1 and 12.2 are connected by a transmission belt transmission, thereby realizing the synchronous rotation of the first and second traction wheels 12.1 and 12.2. The traction motor 13 is fixed to the top of the cradle frame 1, and the output shaft of the traction motor 13 is connected to the shaft end of the first traction wheel shaft corresponding to the first traction wheel 12.1 through a reducer also fixed to the top of the cradle frame 1, and the traction motor 13 drives the first and second traction wheels 12.1 and 12.2 to rotate synchronously.

A cable arrangement device is installed on the cradle frame 1 behind the traction device, and the cable arrangement device includes a cable arrangement motor 14, a cable guide frame 15, and a screw slide mechanism. As shown in FIG7 , the screw slide mechanism includes a slide 16 and a screw guide frame 17 fixed on the cradle frame 1. A screw 18 and a guide rod 19 are rotatably installed in the screw guide frame 17. The screw 18 and the guide rod 19 are axially parallel to each other and are both in the left and right horizontal directions. The slide 16 is coaxially screwed and assembled to the screw 18 through a threaded through hole. At the same time, the slide 16 is coaxially slidably assembled to the guide rod 19 through a through hole. A pulley is also coaxially fixed to one end of the screw 18. The cable guide frame 15 is composed of a support plate and two axially vertical guide rollers. The support plate is fixed on the slide 16 of the screw slide mechanism, so that the cable guide frame 15 is fixed to the slide 16 and moves as a whole. The two guide rollers are distributed side by side from left to right, and the lower end of each guide roller is rotatably connected to the support plate.

The cable motor 14 is fixed to the bottom of the cradle frame 1 , and a pulley is coaxially fixedly installed on the output shaft of the cable motor 14 , and the pulley of the cable motor 14 is connected to the pulley at the end of the screw rod 18 through a transmission belt.

In the cable arrangement device, second proximity switches are fixed at the axial ends of the screw rod 18 and the guide rod 19 in the screw rod guide rod frame 17, and the second proximity switch generates a signal when the slide 16 moves close to any second proximity switch.

A cable receiving device is installed behind the cable arrangement device in the cradle frame 1, and the cable receiving device includes a cable receiving motor 20 and a cable receiving drum 21 rotatably installed in the cradle frame 1, wherein:

The cable drum 21 is axially arranged in the horizontal left-right direction, and a rotating shaft is coaxially fixed to the left end of the cable drum 21, and the rotating shaft is rotatably connected to the corresponding side of the cradle frame 1, and a pulley is coaxially fixed to the rotating shaft, thereby realizing the coaxial connection between the cable drum 21 and the corresponding pulley. The cable motor 20 is fixed to the bottom left side of the cradle frame 1, and a pulley is coaxially fixed to the output shaft of the cable motor 20, and the pulley of the cable motor 20 is connected to the pulley of the rotating shaft through a transmission belt.

As shown in Figure 8, a support sleeve 22 is coaxially fixed to the axial right end of the cable drum 21, and a support shaft 23 is coaxially installed in the support sleeve 22. The support shaft 23 and the support sleeve 22 only rotate relative to each other. The axial end of the support shaft 23 extends out from the sleeve opening of the support sleeve 22 and is coaxially fixed with a support plate 24. A through hole is provided on the right side of the cradle frame 1, and the through hole is coaxial with the support plate 24. A threaded sleeve 25 is coaxially fixed in the through hole, and a movable sleeve 26 is coaxially screwed in the threaded sleeve 25. A top 27 is fixedly connected to one end of the movable sleeve 26 facing the support plate, and the top 27 passes through the sleeve opening in the corresponding direction of the threaded sleeve 25. A groove is provided in the center of one side of the support plate 24 facing the top 27, and the top 27 is pushed into the groove of the support plate 24. The other end of the movable sleeve 26 passes through the corresponding sleeve opening of the threaded sleeve 25, and a rotary handle 28 is fixedly connected to the radial side of the other end of the movable sleeve 26.

Through the above structure, the cable drum 21 is rotatably installed in the cradle frame 1, and the movable sleeve 26 is rotated by the rotary handle 28 so that the top 27 clamps the cable drum 21 in the cradle frame 1, thereby realizing the clamping and rotatable installation of the cable drum 21, and the cable drum 21 is driven to rotate by the cable motor 20 through the pulley mechanism.

In the present invention, the main motor 5, the traction motor 13, the cable arrangement motor 14, and the cable collection motor 20 are all AC variable frequency motors, and the main motor 5, the traction motor 13, the cable arrangement motor 14, and the cable collection motor 20 are respectively controlled by a frequency converter controlled by a PLC controller, and the signal output end of the PLC controller is connected to the signal input end of the frequency converter, and the signal output end of the frequency converter is respectively connected to the control end of each motor.

At the same time, the signal input end of the PLC controller is connected to the first proximity switch 10 and the second proximity switch respectively, the PLC controller receives the signals of the first and second proximity switches, and the PLC controller controls the main motor 5, traction motor 13, cable arrangement motor 14, and cable collection motor 20 through the control inverter based on the signals of the first and second proximity switches.

During operation, the cable first passes through the guide wheel 9, and then passes through the first traction wheel 12.1 and the second traction wheel 12.2 to be guided to the cable arrangement device, and then clamped and guided to the cable drum 21 of the cable collection device by the cable guide frame 15 in the cable arrangement device, and finally collected in the cable drum 21. The PLC controller can realize the meter counting function based on the signal of the first proximity switch 10 and the diameter of the guide wheel 9, and the PLC controller controls each motor based on the calculated number of meters to meet the process flow requirements. At the same time, the PLC controller controls the left and right reciprocating motion of the cable guide frame 15 based on the left and right second proximity switch signals to realize the cable arrangement reversing function.

The embodiments described in the present invention are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made to the technical solutions of the present invention by engineers and technicians in this field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have all been recorded in the claims.

Claims (7)

1. A cradle-type stranding machine, comprising a bottom plate, characterized in that: two coaxial bearing seats are fixedly arranged on the bottom plate, a cradle frame is arranged between the two bearing seats, the front side of the cradle frame is used as the cable entry side to face one of the bearing seats, and the rear side of the cradle frame faces the other bearing seat, the front and rear sides of the cradle frame are respectively connected to a main shaft, and the main shafts of the front and rear sides are respectively coaxially rotatably installed in the bearing seats in corresponding directions, wherein the main shaft of the rear side of the cradle frame is coaxially fixedly connected to a brake disc, the brake disc is coaxially fixed with a pulley, a main motor is fixedly installed on the bottom plate, the output shaft of the main motor is coaxially fixedly installed with a pulley, and the pulley of the main motor and the brake disc The fixed pulleys are connected by a transmission belt transmission; a guide wheel is rotatably installed on the inner wall of the front side of the cradle frame, and the axial direction of the guide wheel is horizontally perpendicular to the bearing seat and the axial direction of the main shaft; a traction device is installed in the cradle frame behind the guide wheel, and the traction device includes a first traction wheel located behind the guide wheel and rotatably installed on the cradle frame at a high position, a second traction wheel located behind the first traction wheel and rotatably installed on the cradle frame at a low position, and a traction motor fixed on the cradle frame, the axial directions of the first traction wheel and the second traction wheel are horizontally perpendicular to the bearing seat and the axial direction of the main shaft respectively, the first traction wheel and the second traction wheel are respectively coaxially fixedly connected with pulleys, and the first and second traction wheels The pulleys are connected by a transmission belt transmission, and the output shaft of the traction motor is connected to one of the traction wheels; a cable arrangement device is installed on the cradle frame at the rear of the traction device, and the cable arrangement device includes a cable arrangement motor, a cable guide frame, and a screw slide mechanism, and the screw slide mechanism includes a slide and a screw guide rail frame fixed on the cradle frame, and a screw rod and a guide rod are rotatably installed in the screw guide rod frame, and the axes of the screw rod and the guide rod are parallel to each other and are horizontally perpendicular to the bearing seat and the main shaft axis. The slide is coaxially screwed and assembled on the screw rod through a threaded through hole, and the slide is coaxially slidably assembled on the guide rod through the through hole, and a pulley is also coaxially fixed to one axial end of the screw rod, and the cable guide The frame is fixed to the slide and moves as a whole; the cable row motor is fixed to the cradle frame, the output shaft of the cable row motor is coaxially fixedly mounted with a pulley, and the pulley of the cable row motor is connected to the pulley at the end of the screw rod through a transmission belt; a cable winding device is installed in the cradle frame behind the cable row device, and the cable winding device includes a cable winding motor and a cable winding drum rotatably mounted in the cradle frame, the axial direction of the cable winding drum is horizontally perpendicular to the bearing seat and the axial direction of the main shaft, the cable winding drum is coaxially fixedly connected to the pulley, the cable winding motor is fixed to the cradle frame, the output shaft of the cable winding motor is coaxially fixedly mounted with a pulley, and the pulley of the cable winding motor is connected to the pulley of the cable winding drum through a transmission belt; A pneumatic brake is also installed on the bearing seat in the direction corresponding to the brake disc, and the pneumatic brake cooperates with the brake disc; A wheel frame is fixed on the inner wall of the front side of the cradle frame, the guide wheel is rotatably installed in the wheel frame, the wheel frame is also fixed with a first proximity switch, and the guide wheel is also fixed with a sensing block. When the guide wheel rotates, the sensing block causes the first proximity switch to generate a signal through the first proximity switch. 2. A cradle-type strand twisting machine according to claim 1, characterized in that: the cradle frame is respectively fixed with a traction wheel frame corresponding to each traction wheel position, and a traction wheel shaft is rotatably installed in the traction wheel frame, the first traction wheel and the second traction wheel are respectively coaxially fixed to the traction wheel shaft of the traction wheel frame at the corresponding position through a tightening connection sleeve, and the pulleys corresponding to the first and second traction wheels are respectively coaxially fixed on the traction wheel shaft where the first and second traction wheels are located, thereby realizing the coaxial fixed connection between the first and second traction wheels and the corresponding pulleys, and the output shaft of the traction motor is transmission-connected to one of the traction wheel shafts through a reducer. 3. A cradle-type stranding machine according to claim 1, characterized in that: in the cable arrangement device, second proximity switches are fixed at the axial ends of the screw rod and the guide rod in the screw rod guide rod frame, and when the slide moves close to any one of the second proximity switches, the second proximity switch generates a signal. 4. A cradle-type stranding machine according to claim 1, characterized in that: in the cable arrangement device, the cable guide frame is composed of a support plate and two axially vertical guide rollers, the support plate is fixed on the slide of the screw slide mechanism, the two guide rollers are distributed side by side, and the lower end of each guide roller is rotatably connected to the support plate. 14. The swiftly and minutely adjusting device for a wood-planer as claimed in claim 13, wherein said linking rod and said adjusting base are pivotally connected to each other with a bolt, and said bolt has a round shank to contact with said linking rod. said linking rod and said adjusting base are pivotally connected to each other with a bolt, and said bolt has a round shank to contact with said linking rod. 6. A cradle-type stranding machine according to any one of claims 1-5, characterized in that the main motor, traction motor, cable arrangement motor, and cable collection motor are all AC variable frequency motors, and the main motor, traction motor, cable arrangement motor, and cable collection motor are respectively controlled by a frequency converter controlled by a controller. 7. A cradle-type stranding machine according to claim 6, characterized in that: the controller is connected to a first proximity switch and a second proximity switch, the controller receives signals from the first and second proximity switches, and controls the main motor, traction motor, cable arrangement motor, and cable collection motor by controlling the inverter based on the signals from the first and second proximity switches.