Lifting chain block type cable unwinding device

Abstract

The invention discloses a lifting chain block type cable unwinding device, and belongs to the technical field of cable unwinding, the lifting chain block type cable unwinding device comprises a frame body, two bearing seats and a bearing lifting mechanism, the two bearing seats are oppositely arranged, each bearing seat comprises a bearing fixing part, a bearing connecting part and a bearing driving assembly, the bearing connecting part is arranged on the bearing fixing part in a penetrating mode, and the bearing lifting mechanism is arranged on the bearing fixing part. The bearing connecting parts rotate and are matched with the bearing fixing part in a sliding mode, the bearing driving assembly is used for driving the bearing connecting parts to move in the horizontal direction, the bearing lifting mechanism is used for driving the bearing fixing part to move in the vertical direction, and the diameter of the two bearing connecting parts is smaller than that of round holes in the two sides of the winding roll. According to the cable unwinding device, the working efficiency of the winding roll during cable unwinding can be improved, and the situation that the cable is abraded during unwinding is reduced.

Description

Technical Field

[0001] The invention relates to the field of cable unwinding, in particular to a liftable chain-type cable unwinding device. Background Art

[0002] A cable reel is a frame device specifically used for winding, storing, transporting and laying cables. It is also an essential tool for handling and moving cables (especially long-distance, large-diameter or heavy cables) in many fields such as power, communications, construction, and industry.

[0003] In conventional operations, cable reels are often quite heavy due to the inherent weight of the cable itself and the weight of the reel itself. Consequently, unwinding the cable from the reel typically requires multiple workers to collaborate, manually pulling the cable from the reel one coil at a time. This method of operation results in low unwinding efficiency and is prone to cable wear. Summary of the Invention

[0004] In order to improve the working efficiency of the cable reel when unwinding the cable and reduce the wear of the cable when unwinding, the present application provides a liftable chain-type cable unwinding device.

[0005] The present application provides a liftable chain-type cable unwinding device that adopts the following technical solution: A liftable chain-type cable unwinding device includes a frame, a bearing seat and a bearing lifting mechanism. Two bearing seats are arranged opposite each other. The bearing seats include a bearing fixing part, a bearing connecting part and a bearing driving assembly. The bearing connecting part is passed through the bearing fixing part. The bearing connecting part rotates and slides to cooperate with the bearing fixing part. The bearing driving assembly is used to drive the bearing connecting part to move in the horizontal direction. The bearing lifting mechanism is used to drive the bearing fixing part to move in the vertical direction. The diameter of the two bearing connecting parts is smaller than the diameter of the circular holes on both sides of the winding drum.

[0006] By adopting the above technical solution, when the cable reel is moved between the two bearing connection parts, the bearing drive assembly drives the two bearing connection parts to move horizontally toward each other, so that the two bearing connection parts are respectively inserted into the circular holes on both sides of the cable reel, thereby realizing the connection between the bearing connection part and the cable reel. At this time, the bearing lifting mechanism drives the bearing fixing part to move in the vertical direction to realize the movement of the cable reel in the vertical direction, and then realizes the suspension of the cable reel, which is convenient for pulling out and removing the cable from the reel to realize the unwinding of the cable. During the cable unwinding process, there is no need for multiple staff members to cooperate to manually pull the cable out of the reel one circle at a time. The work efficiency is high and the rotational cooperation between the bearing connection part and the bearing fixing part makes it easy to reduce the friction between the cable and the other cables or the reel when unwinding, so that the cable is not easily worn when unwinding.

[0007] Optionally, the load-bearing lifting mechanism includes a load-bearing motor, a lifting drive wheel and a lifting drive belt. The lifting drive wheels are horizontally distributed in two groups, each group of lifting drive wheels is provided with two lifting drive wheels in the vertical direction and each lifting drive wheel is rotatably installed on the frame. There are two lifting drive belts and they are respectively wound around the two lifting drive wheels. The two load-bearing fixed parts are respectively fixedly installed on the two lifting drive belts. A lifting drive shaft is coaxially fixed between the two lifting drive wheels near the top of the frame. The load-bearing motor is installed on the frame and is used to drive one of the lifting drive wheels to rotate.

[0008] By adopting the above technical solution, when the load-bearing motor drives one of the lifting drive wheels to rotate, the two lifting drive belts move together under the cooperation of the remaining lifting drive wheels and the lifting drive shaft, thereby synchronously realizing the movement of the two load-bearing fixed parts in the vertical direction, which is convenient and fast.

[0009] Optionally, one of the lifting drive wheels is provided with a limiting assembly, the limiting assembly including a limiting ratchet, a limiting pawl and a limiting spring, the limiting ratchet is coaxially fixedly mounted on one of the lifting drive wheels, the limiting pawl is rotatably mounted on the frame and engages with the limiting ratchet, the limiting spring is mounted on the frame and is used to apply an elastic force to the limiting pawl to rotate toward the limiting ratchet.

[0010] By adopting the above technical solution, the cooperation between the limiting ratchet and the limiting pawl plays a role in limiting the position of the lifting drive wheel after rotation, which is convenient for ensuring the stability of the position of the lifting drive wheel after rotation, and then ultimately ensuring the stability of the position of the two bearing fixing parts after movement in the vertical direction.

[0011] Optionally, the load-bearing drive assembly includes a load-bearing drive cylinder, which is horizontally arranged on the load-bearing fixing portion, and the load-bearing connecting portion is installed on the piston rod of the load-bearing drive cylinder.

[0012] By adopting the above technical solution, the load-bearing driving cylinder drives its own piston rod to move, so that the load-bearing connecting part can be inserted into or removed from the round hole of the winding drum, which is convenient and fast.

[0013] Optionally, the load-bearing connection part is provided with an inner support rod and an inner support driving assembly. The inner support rod is radially arranged in the load-bearing connection part and slides with the load-bearing connection part. There are multiple inner support rods distributed around the axis of the load-bearing connection part. The inner support driving assembly is used to drive each inner support rod slide groove to move close to or away from the axial direction of the load-bearing connection part.

[0014] By adopting the above technical solution, when the bearing drive assembly drives the bearing connection part to be inserted into the circular hole of the winding reel, the internal support drive assembly drives each internal support rod to move in the direction away from the bearing connection part until it is pressed against the inner wall of the circular hole, which can fully limit the winding reel and the bearing connection part, and is conducive to further ensuring the connection stability between the winding reel and the bearing connection part.

[0015] Optionally, the internal support drive assembly includes an internal support bidirectional screw rod, an internal support sleeve and an internal support reset member. The internal support bidirectional screw rod is coaxial and rotatably penetrates the load-bearing connection part. Two internal support sleeves are arranged opposite to each other, and the two internal support sleeves are respectively threadedly engaged with two sections of the internal support bidirectional screw rod with opposite rotation directions. The load-bearing connection part is provided with a sleeve limit member for limiting the rotation of the internal support sleeve around its own axis. The two sides facing the two internal support sleeves are provided with inclined guide surfaces, and two groups of internal support rods are arranged corresponding to the two inclined guide surfaces. There are multiple groups of internal support rods distributed circumferentially around the axis of the load-bearing connection part, and one end of each internal support rod respectively contacts the inclined guide surfaces of the two inner support sleeves. The internal support reset member is used to reset each internal support rod.

[0016] By adopting the above technical solution, when the inner support bidirectional screw rod is driven to rotate, the two inner support sleeves move toward or away from each other under the limiting action of the sleeve limiter, and then the two groups of inner support rods are moved along the radial direction of the inner support sleeve through the two inclined guide surfaces, so that after each inner support rod is inserted into the circular hole, each inner support rod can be quickly tightened against the inner wall of the circular hole, which is convenient and stable.

[0017] Optionally, the inner support reset member includes an elastic paddle, which is fixedly mounted on the load-bearing connection part. The elastic paddle has an elastic reset part which is arranged one-to-one corresponding to the two groups of inner support rods. Each of the inner support rods is provided with a reset slot which is arranged corresponding to the elastic reset part. The elastic reset part is used to apply an elastic force to the inner support rod to move toward the axis of the load-bearing connection part.

[0018] By adopting the above technical solution, when the supporting bidirectional screw rod is rotated in the opposite direction, the two inner support sleeves move away from each other. At this time, each support rod moves toward the axial direction close to the load-bearing connection part under the elastic force of each elastic reset part and resets synchronously, which is convenient and fast.

[0019] Optionally, the load-bearing drive assembly includes a drive screw and a drive frame, the drive screw is rotatably installed on the load-bearing fixed part, the drive screw is passed through the load-bearing connecting part and is threadedly engaged with the load-bearing connecting part, a load-bearing drive groove is opened on the outer peripheral surface of the load-bearing connecting part, and the drive frame is inserted into the load-bearing drive groove and rotatably engaged with the load-bearing drive groove.

[0020] By adopting the above technical solution, when the driving screw is rotated, the driving frame cooperates with the thread of the driving screw and drives the load-bearing connection part to move along its own axial direction under the limiting action of the load-bearing connection part. The self-locking effect of the thread between the driving screw and the driving frame is conducive to ensuring the stability of the position of the load-bearing connection part after movement. At the same time, the moving rod of the driving screw is driven by the driving frame, so that the load-bearing driving assembly is not likely to cause interference with the rotation of the internal support bidirectional screw rod, which facilitates the subsequent stable rotation of the internal support bidirectional screw rod.

[0021] Optionally, the driving frame is rotatably mounted with two rollers, and both of the rollers are rollingly fitted in the bearing driving groove.

[0022] By adopting the above technical solution, the provision of the roller further reduces the friction between the driving frame and the bearing connection part, which is beneficial to further ensure the smoothness and stability of the bearing connection part when rotating relative to the driving frame.

[0023] Optionally, the bottom of the frame is equipped with brake universal wheels distributed in a rectangular shape.

[0024] By adopting the above technical solution, the setting of the brake universal wheel makes it convenient to move the frame to the location of the cable reel to fix and lift the cable reel when the cable reel is difficult to move, and then move and position the frame as a whole to finally realize the movement and positioning of the cable reel.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. During the cable unwinding process, there is no need for multiple workers to manually pull the cable out of the reel one circle at a time. The work efficiency is high and the rotational cooperation between the load-bearing connection part and the load-bearing fixed part facilitates reducing the friction between the cable and other cables or the reel when unwinding, making the cable less prone to wear when unwinding.

[0026] 2. When the load-bearing motor drives one of the lifting drive wheels to rotate, each lifting drive belt moves together under the action of the lifting synchronous wheel and the lifting synchronous belt, thereby realizing the synchronous movement of the two load-bearing fixed parts in the vertical direction, which is convenient and fast.

[0027] 3. Driving each inner support rod to move away from the load-bearing connection part until it is pressed against the inner wall of the circular hole can fully limit the winding drum and the load-bearing connection part, which is beneficial to further ensure the connection stability between the winding drum and the load-bearing connection part. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application.

[0029] Figure 2 yes Figure 1 A partial enlarged schematic diagram of part A.

[0030] Figure 3 It is a schematic diagram of the main structure of the load-bearing lifting mechanism in Example 1 of the present application.

[0031] Figure 4 It is a schematic diagram of the overall structure of Example 2 of the present application.

[0032] Figure 5 It is a schematic cross-sectional view of the main structure of the support seat in Example 2 of the present application.

[0033] Figure 6 yes Figure 4 A partial enlarged schematic diagram of part B.

[0034] Description of reference numerals: 1. Frame; 101. Fixing frame; 102. Fixing rod; 2. Bearing seat; 201. Bearing fixing part; 202. Bearing connection part; 3. Brake universal wheel; 4. Bearing motor; 5. Lifting drive wheel; 6. Lifting drive belt; 7. Lifting drive shaft; 8. Limit ratchet; 9. Limit pawl; 10. Limit spring; 11. Bearing drive cylinder; 12. Internal support rod; 121. Reset slot; 13. Internal support two-way screw rod; 14. Internal support sleeve; 15. Sleeve limiting strip; 16. Sleeve limiting slot; 17. Internal support handle; 18. Inclined guide surface; 19. Elastic paddle; 191. Elastic reset part; 20. Accommodating slot; 21. Drive screw rod; 22. Drive frame; 23. Bearing drive slot; 24. Roller; 25. Drive handle; 26. Cable reel; 261. Round hole. DETAILED DESCRIPTION

[0035] The following is combined with Figure 1-6 This application is described in further detail.

[0036] Example 1.

[0037] The embodiment of the present application discloses a liftable chain-type cable unwinding device. Figure 1 The liftable chain-type cable unwinding device includes a frame 1, a bearing seat 2, and a bearing lifting mechanism, wherein the frame 1 includes two fixed frames 101 and a fixed rod 102. The two fixed frames 101 are arranged opposite each other, and the two ends of the fixed rod 102 in the length direction are fixedly installed on the top of the two fixed frames 101 respectively. In the embodiment of the present application, the length direction of the fixed rod 102 is set as the x-axis direction and the width direction is set as the y-axis direction. Two brake universal wheels 3 distributed along the y-axis direction are rotatably installed at the bottom of each of the two fixed frames 101. That is, four brake universal wheels 3 distributed in a rectangular shape are installed at the bottom of the frame 1 to facilitate the movement of the frame 1 as a whole and ensure the stability of the position of the frame 1 after the overall movement.

[0038] Reference Figure 1 and Figure 2The load-carrying lifting mechanism includes a load-carrying motor 4, a lifting drive wheel 5, and a lifting drive belt 6. Specifically, there are two groups of lifting drive wheels 5 horizontally distributed along the x-axis direction. Each group of lifting drive wheels 5 is provided with two lifting drive wheels 5 in the vertical direction, and each lifting drive wheel 5 is rotatably mounted on the frame 1. There are two lifting drive belts 6 and they are respectively wound around the two lifting drive wheels 5, so that when one of the lifting drive wheels 5 rotates, the other lifting drive wheel 5 drives the lifting drive belt 6 to move synchronously. Figure 3 A lifting drive shaft 7 is coaxially fixed between the two lifting drive wheels 5 near the top of the frame 1. The lifting drive shaft 7 is rotatably installed on the fixed rod 102. In the embodiment of the present application, the lifting drive wheels 5 are all selected as sprockets, and the lifting drive belts 6 are all selected as chains to ensure the overall transmission stability of the load-bearing lifting mechanism.

[0039] Reference Figure 2 and Figure 3 The load-bearing motor 4 is mounted on one of the fixed frames 101 and is used to drive one of the lifting drive wheels 5. When the load-bearing motor 4 drives one of the lifting drive wheels 5 to rotate, the remaining lifting drive wheels 5 and the lifting timing belt move synchronously under the action of the lifting drive shaft 7. Two load-bearing seats 2 are provided and fixedly mounted on one side of the two lifting drive belts 6, so that the two load-bearing seats 2 move vertically along with the two lifting timing belts.

[0040] Reference Figure 2 In order to ensure the stability of the positions of the two bearing seats 2 after moving in the vertical direction, a limiting assembly is provided on one of the lifting drive wheels 5 near the top of the frame 1. Specifically, the limiting assembly includes a limiting ratchet 8, a limiting pawl 9 and a limiting spring 10, wherein the limiting ratchet 8 is coaxially fixedly installed on one of the lifting drive wheels 5, the limiting pawl 9 is rotatably installed on the frame 1 and engages with the limiting ratchet 8, and the limiting spring 10 is installed on the frame 1 and is used to apply an elastic force to the limiting pawl 9 to rotate in the direction of the limiting ratchet 8, so as to limit the position of the lifting drive wheel 5 after rotation through the cooperation of the limiting ratchet 8 and the limiting pawl 9, so as to ensure the stability of the position of the lifting drive wheel 5 after rotation, and then to ultimately ensure the stability of the position of the two bearing fixing parts 201 after moving in the vertical direction.

[0041] Reference Figure 1 and Figure 2The supporting base 2 includes a supporting fixing portion 201, a supporting connection portion 202, and a supporting drive assembly, wherein the supporting fixing portions 201 of the two supporting bases 2 are respectively fixedly mounted on the two lifting drive belts 6, so that the two supporting fixing portions 201 are driven to move in the vertical direction by the two lifting drive belts 6. Circular holes 261 are provided on both sides of the cable reel 26 for winding the cable, and the two supporting connection portions 202 are respectively passed through the two supporting fixing portions 201 along the x-axis direction. The supporting connection portions 202 rotate and slide to fit with the supporting fixing portions 201, that is, the two supporting connection portions 202 can rotate around their own axes and slide along the x-axis direction, and the diameter of the supporting connection portions 202 is smaller than the diameter of the circular holes 261 on both sides of the cable reel 26, so that the two supporting connection portions 202 can be respectively inserted into the circular holes 261 on both sides of the cable reel 26, thereby realizing the connection between the supporting base 2 and the cable reel 26.

[0042] Continue to refer to Figure 1 and Figure 2 Furthermore, the load-bearing driving assembly includes a load-bearing driving cylinder 11, the cylinder body of the load-bearing driving cylinder 11 is fixedly installed on the load-bearing fixing part 201, and the load-bearing connecting part 202 is rotatably installed on the piston rod of the load-bearing driving cylinder 11, so that when the load-bearing driving cylinder 11 drives its own piston rod to move, the load-bearing connecting part 202 is inserted into or disengaged from the circular hole 261 of the winding reel 26, so that the load-bearing seat 2 is connected or disconnected with the winding reel 26.

[0043] The implementation principle of a liftable chain-type cable unwinding device in an embodiment of the present application is as follows: when unwinding the cable on the winding reel 26, the winding reel 26 is first moved between the two bearing connection parts 202, and then the two bearing connection parts 202 are driven by the two bearing driving cylinders 11 to move toward each other along the x-axis direction, so that the two bearing connection parts 202 are respectively inserted into the circular holes 261 on both sides of the winding reel 26, thereby realizing the connection between the bearing connection part 202, that is, the bearing seat 2 and the winding reel 26. After the supporting seat 2 is connected to the cable reel 26, the supporting motor 4 drives the supporting fixing part 201 to move in the vertical direction to realize the movement of the cable reel 26 in the vertical direction, thereby realizing the suspension of the cable reel 26, making it easy to pull out the cable from the cable reel 26 and realize the unwinding of the cable. During the cable unwinding process, there is no need for multiple staff members to cooperate to manually pull the cable out of the cable reel 26 in circles. The work efficiency is high and the rotational cooperation between the supporting connection part 202 and the supporting fixing part 201 makes it easy to reduce the friction between the cable and the other cables or the cable reel 26 when unwinding, so that the cable is not easily worn when unwinding.

[0044] Example 2.

[0045] The main difference between the embodiment of the present application and embodiment 1 is that the specific structure of the supporting seat 2 is different. Figure 4 and Figure 5The bearing seat 2 in the embodiment of the present application includes a bearing fixing part 201, a bearing connecting part 202 and a bearing driving assembly. The bearing connecting part 202 is provided with an inner support rod 12 and an inner support driving assembly. The inner support driving assembly includes an inner support bidirectional screw rod 13, an inner support sleeve 14 and an inner support reset part, wherein the inner support bidirectional screw rod 13 is coaxially arranged along the x-axis direction and rotatably connected to the bearing connecting part 202, and two inner support sleeves 14 are arranged opposite to each other. The two inner support sleeves 14 are respectively threadedly matched with the two sections of the inner support bidirectional screw rod 13 with opposite thread rotation directions. The bearing connecting part 202 is provided with a sleeve limiter for limiting the rotation of the inner support sleeve 14 around its own axis, so that when the inner support bidirectional screw rod 13 rotates around its own axis, the two inner support sleeves 14 move in the direction of approaching or moving away from each other.

[0046] Reference Figure 5 The sleeve limiting member includes a sleeve limiting strip 15 fixedly connected to the interior of the load-bearing connection portion 202. The sleeve limiting strip 15 extends along the x-axis. The outer circumferences of the two inner support sleeves 14 are each provided with a sleeve limiting groove 16 corresponding to the sleeve limiting strip 15 and extending along the x-axis. The sleeve limiting strip 15 slides and fits into the sleeve limiting grooves 16 of the two inner support sleeves 14 to limit the rotation of the inner support sleeves 14. This is simple and stable. The ends of the two inner support bidirectional screw rods 13 of the two inner support drive assemblies that are separated in the longitudinal direction are fixedly connected to an inner support handle 17 to facilitate the application of force to achieve rotation of the inner support bidirectional screw rods 13.

[0047] Continue to refer to Figure 5 , an inclined guide surface 18 is provided on the side facing the two inner support sleeves 14, and two groups of inner support rods 12 are provided corresponding to the two inclined guide surfaces 18. In the embodiment of the present application, there are three inner support rods 12 in the two groups distributed circumferentially around the axis of the load-bearing connection part 202, and one end of each inner support rod 12 respectively contacts the inclined guide surface 18 of the two inner support sleeves 14, so that when the two inner support sleeves 14 move toward each other, the two groups of inner support rods 12 move toward the axis away from the load-bearing connection part 202 under the driving action of the inclined guide surface 18.

[0048] Continue to refer to Figure 5 The internal support reset member is used to reset each internal support rod 12. Specifically, the internal support reset member includes an elastic paddle 19. Three elastic paddles 19 are provided corresponding to each group of support rods. Each elastic paddle 19 is arranged along the x-axis direction and is fixed to the outer peripheral surface of the load-bearing connection part 202 by screws. The outer peripheral surface of the load-bearing connection part 202 is provided with three accommodating grooves 20 corresponding to the elastic paddles 19 one by one. Each elastic paddle 19 is respectively located in the three accommodating grooves 20 to ensure the position stability of the elastic paddle 19 and realize the storage and accommodation of the elastic paddle 19.

[0049] Continue to refer to Figure 5The two sections of the elastic paddle 19 in the length direction are respectively provided with elastic reset parts 191 corresponding to the two groups of inner support rods 12. Each inner support rod 12 is provided with a reset slot 121 corresponding to the elastic reset part 191. Each elastic reset part 191 is respectively located in each reset slot 121 and applies an elastic force to the support rod to move toward the axial direction of the load-bearing connection part 202, so as to quickly realize the reset of each support rod through the elastic force of the elastic reset part 191.

[0050] Reference Figure 5 and Figure 6 The bearing drive assembly includes a driving screw 21 and a driving frame 22. Specifically, the driving screw 21 is arranged along the x-axis direction and rotatably installed on the bearing fixing part 201. The driving screw 21 is passed through the bearing connecting part 202 and is threadedly engaged with the bearing connecting part 202. A bearing driving groove 23 is provided on the outer circumference of the bearing connecting part 202. Two rollers 24 are rotatably installed on the driving frame 22. Both rollers 24 are rollingly engaged in the bearing driving groove 23, so that when the driving screw 21 rotates, the driving frame 22 drives the bearing connecting part 202 to move along its own axis direction, that is, the x-axis direction, due to the threaded engagement with the driving screw 21 and under the limiting action of the bearing driving groove 23. The self-locking effect of the thread between the driving screw 21 and the driving frame 22 is conducive to ensuring the stability of the position of the bearing connecting part 202 after movement. The setting of the rollers 24 is conducive to ensuring the smooth stability of the bearing connecting part 202 when it rotates relative to the driving frame 22. One end of the driving screw 21 away from the frame 1 is fixedly connected to a driving handle 25 so as to apply force to rotate the driving screw 21 .

[0051] The implementation principle of the embodiment of the present application is the same as that of Example 1. The main difference is that when the load-bearing connection part 202 is inserted into the circular hole 261 of the cable reel 26, the embodiment of the present application can rotate the internal support bidirectional screw rod 13 to make each internal support rod 12 move in a direction away from the axis of the load-bearing connection part 202. When each internal support rod 12 moves to a state where it is pressed against the inner wall of the circular hole 261, it can further limit the position between the cable reel 26 and the load-bearing connection part 202, which is beneficial to further ensure the connection stability between the cable reel 26 and the load-bearing connection part 202.

[0052] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A liftable chain-type cable unwinding device, characterized in that: The invention comprises a frame (1), a bearing seat (2) and a bearing lifting mechanism, wherein two bearing seats (2) are arranged opposite to each other, and the bearing seat (2) comprises a bearing fixing portion (201), a bearing connection portion (202) and a bearing drive component, wherein the bearing connection portion (202) is passed through the bearing fixing portion (201), the bearing connection portion (202) rotates and slides to fit with the bearing fixing portion (201), the bearing drive component is used to drive the bearing connection portion (202) to move in a horizontal direction, and the bearing lifting mechanism is used to drive the bearing fixing portion (201) to move in a vertical direction, and the diameter of the two bearing connection portions (202) is smaller than the diameter of the circular holes (261) on both sides of the winding drum (26).

2. The liftable chain-type cable unwinding device according to claim 1, characterized in that: The load-bearing lifting mechanism comprises a load-bearing motor (4), a lifting drive wheel (5) and a lifting drive belt (6); the lifting drive wheels (5) are horizontally distributed in two groups, each group of lifting drive wheels (5) is provided with two lifting drive wheels (5) in the vertical direction, and each lifting drive wheel (5) is rotatably mounted on the frame (1); two lifting drive belts (6) are provided and respectively wound around the two lifting drive wheels (5); the two load-bearing fixing parts (201) are respectively fixedly mounted on the two lifting drive belts (6); a lifting drive shaft (7) is coaxially fixedly arranged between the two lifting drive wheels (5) near the top of the frame (1); the load-bearing motor (4) is installed on the frame (1) and is used to drive one of the lifting drive wheels (5) to rotate.

3. The liftable chain-type cable unwinding device according to claim 2, characterized in that: One of the lifting drive wheels (5) is provided with a limiting assembly, the limiting assembly comprising a limiting ratchet (8), a limiting pawl (9) and a limiting spring (10), the limiting ratchet (8) being coaxially fixedly mounted on one of the lifting drive wheels (5), the limiting pawl (9) being rotatably mounted on the frame (1) and meshing with the limiting ratchet (8), the limiting spring (10) being mounted on the frame (1) and being used to apply an elastic force to the limiting pawl (9) to rotate in the direction of the limiting ratchet (8).

4. The liftable chain-type cable unwinding device according to claim 1, characterized in that: The bearing drive assembly comprises a bearing drive cylinder (11), the bearing drive cylinder (11) is horizontally arranged on the bearing fixing portion (201), and the bearing connection portion (202) is installed on the piston rod of the bearing drive cylinder (11).

5. The liftable chain-type cable unwinding device according to claim 1, characterized in that: The load-bearing connection part (202) is provided with an inner support rod (12) and an inner support driving assembly. The inner support rod (12) is radially passed through the load-bearing connection part (202) and is slidably fitted in the load-bearing connection part (202). There are multiple inner support rods (12) distributed around the axis of the load-bearing connection part (202). The inner support driving assembly is used to drive the sliding grooves of each inner support rod (12) to move close to or away from the axis direction of the load-bearing connection part (202).

6. The liftable chain-type cable unwinding device according to claim 5, characterized in that: The inner support driving assembly includes an inner support bidirectional screw rod (13), an inner support sleeve (14) and an inner support reset member. The inner support bidirectional screw rod (13) is coaxial and rotatably penetrates the bearing connection part (202). Two inner support sleeves (14) are arranged opposite to each other. The two inner support sleeves (14) are respectively threadedly matched with two sections of the inner support bidirectional screw rod (13) with opposite thread rotation directions. The bearing connection part (202) is provided with a mechanism for rotating the inner support sleeve (14) around its own axis. A sleeve limiter with a dynamic limit, wherein the two inner support sleeves (14) are each provided with an inclined guide surface (18) on one side facing each other, and two groups of inner support rods (12) are provided corresponding to the two inclined guide surfaces (18), and the two groups of inner support rods (12) are circumferentially distributed around the axis of the bearing connection part (202) and one end of each inner support rod (12) is respectively in contact with the inclined guide surface (18) of the two inner support sleeves (14), and the inner support reset member is used to reset each inner support rod (12).

7. The liftable chain-type cable unwinding device according to claim 6, characterized in that: The inner support reset member includes an elastic paddle (19), which is fixedly installed on the load-bearing connection part (202). The elastic paddle (19) has an elastic reset part (191) arranged in a one-to-one correspondence with the two groups of inner support rods (12). Each of the inner support rods (12) is provided with a reset slot (121) arranged corresponding to the elastic reset part (191). The elastic reset part (191) is used to apply an elastic force to the inner support rod (12) to move toward the axial direction of the load-bearing connection part (202).

8. The liftable chain-type cable unwinding device according to claim 5, characterized in that: The bearing drive assembly comprises a driving screw (21) and a driving frame (22), wherein the driving screw (21) is rotatably mounted on the bearing fixing portion (201), the driving screw (21) is passed through the bearing connection portion (202) and is threadedly engaged with the bearing connection portion (202), a bearing drive groove (23) is provided on the outer peripheral surface of the bearing connection portion (202), and the driving frame (22) is snapped into the bearing drive groove (23) and is rotatably engaged with the bearing drive groove (23).

9. The liftable chain-type cable unwinding device according to claim 8, characterized in that: The driving frame (22) is rotatably mounted with two rollers (24), and both rollers (24) are rollingly fitted in the bearing driving groove (23).

10. The liftable chain-type cable unwinding device according to claim 1, characterized in that: Braking universal wheels (3) distributed in a rectangular shape are installed at the bottom of the frame (1).

Images