Portable electric cable reel

Abstract

The application relates to the technical field of cable reels, and provides a portable electric cable reel, which comprises a base, a cable reel assembly, a driving assembly and a plurality of rollers, the cable reel assembly and the driving assembly are arranged on the base, the driving assembly is connected with the cable reel assembly and is used for driving the cable reel assembly to rotate, the rollers are rotationally connected to the bottom of the base, the rollers are distributed at intervals and are located in the same plane. The application has the effect of conveniently moving the cable reel.

Description

Technical Field

[0001] This application relates to the field of cable reel technology, and in particular to a portable electric cable reel. Background Technology

[0002] With the development of broadcasting and wireless communications, the demand for special vehicles such as television broadcasting vans, communication vehicles, and emergency command vehicles is increasing, and their functions are becoming more comprehensive; more and more equipment needs to be installed. Consequently, there is a need to equip them with various cables to connect to external power sources and other equipment, making cable reels a major basic component.

[0003] Currently, domestic multi-reel cable reels consist of the following components: a servo motor, a support frame, a drive shaft, cable reels, and an operation and control system. One motor drives multiple cable reels on it to rotate in both directions via a drive shaft, thus enabling cable winding and unwinding. Simultaneously, each cable reel can also rotate freely independently of the motor drive, facilitating the free winding and unwinding of individual cables under manual operation or while the motor is running and the reel remains stationary. During vehicle operation, each cable reel is locked.

[0004] To achieve the above objectives, the common practice is to install a pin-type clutch and a locking device on each cable reel. Manually operated, the pin closes, engaging the cable reel with the motor and causing it to rotate synchronously with the motor (drive shaft); conversely, opening the pin disengages it from the drive shaft, allowing it to rotate freely. During operation, the pressure plate is manually tightened to lock the cable reel in place.

[0005] Regarding the aforementioned technologies, most existing electric cable reels are completely fixed, secured to walls or special brackets with bolts. This results in a fixed position that cannot be moved flexibly, and therefore needs improvement. Utility Model Content

[0006] To facilitate the movement of the cable reel, this application provides a portable electric cable reel.

[0007] The portable electric cable reel provided in this application adopts the following technical solution: A portable electric cable reel includes a base, a cable reel assembly, a drive assembly, and a plurality of rollers. The cable reel assembly and the drive assembly are both mounted on the base. The drive assembly is connected to the cable reel assembly and is used to drive the cable reel assembly to rotate. The rollers are rotatably connected to the bottom of the base. The rollers are spaced apart and located in the same plane.

[0008] By adopting the above technical solution, four rollers are installed at the bottom of the base. The rollers are fixed at the four corners of the base by tapping (tapping refers to the process of machining internal threads in a pre-drilled hole on the workpiece with a tap). The presence of the rollers makes it convenient for workers to transport the entire cable reel and move it to the required position, thus realizing the portable movement function of the electric cable reel.

[0009] Preferably, the drive assembly includes a servo motor, a rotating shaft, a sprocket, and a chain. The rotating shaft is horizontally arranged and rotatably connected to the base. The sprocket is coaxially connected to the rotating shaft. The output shaft of the servo motor is coaxially connected to the sprocket. The two sprockets are connected by the chain. The cable reel assembly is located on the rotating shaft.

[0010] By adopting the above technical solution, the output shaft of the servo motor will rotate when it runs. Under the action of the chain and sprocket connection, the rotation shaft can be realized, thereby driving the cable reel assembly to rotate.

[0011] Preferably, the cable reel assembly includes a cable reel body, a fixing block, a pin, and fasteners, and the cable reel body is mounted on the rotating shaft via ball bearings; The fixing block is located on one side of the cable reel body, the pin is movably connected to the fixing block, the fastener is located on the fixing block and is used to fix the pin; a bushing is sleeved on the rotating shaft, and a slot is provided on the bushing for the pin to be inserted. The rotating shaft is provided with at least two cable reel assemblies, and the two rotating shafts are arranged in parallel.

[0012] By adopting the above technical solution, the cable reel body is divided into upper and lower layers, with two cable reel bodies connected to a rotating shaft. The four cable reel bodies generally do not operate simultaneously. During use, when the operator inserts the control pin into the slot of the bushing, the cable reel body and the rotating shaft become integrated, and the corresponding cable reel body will rotate with the rotating shaft. Conversely, if the pin is not inserted into the bushing, due to the presence of the ball bearing, the cable reel body will rotate relative to the rotating shaft, meaning it will not rotate with the rotating shaft. The application scenario where the cable reel body does not need to rotate is as follows: When the broadcast van is broadcasting, and the optical cable is already connected to the camera, the cable reel body does not need to rotate, otherwise it will affect the camera's operation.

[0013] Preferably, the fixing block has a through groove, and the pin includes a straight segment and an arc segment connected to each other. The straight segment is movably disposed in the groove, and the arc segment is located outside the groove. The end of the straight segment away from the arc segment is engaged in the slot. The straight segment has a strip hole, and the fastener is a fastening bolt. The fastening bolt passes through the strip hole and is screwed onto a nut pre-set on the fixing block.

[0014] By adopting the above technical solution, workers can apply external force to the arc-shaped segment, causing the straight segment to move linearly within the groove, thereby controlling the straight segment to be inserted into the slot. Then, a fastening bolt is passed through the slot of the straight segment and screwed onto the nut to lock the straight segment, preventing it from coming out of the slot and ensuring the firmness of the connection between the pin and the bushing.

[0015] Preferably, it further includes a braking assembly, which is disposed on the base and is used to restrict the rotation of the cable reel body. The braking assembly includes a mounting bracket, a braking block, and a braking screw. The mounting bracket is disposed on the base. The braking block is rotatably connected to the mounting bracket and is used to contact the cable reel body. The braking screw is used to lock the braking block on the mounting bracket.

[0016] By adopting the above technical solution, after the cable reel body is wound up, it needs to remain stable during transportation (operation) to prevent damage to the cable due to inertial rotation. Therefore, a braking assembly is added to brake the cable reel body, limiting its rotation during transportation. During braking, the brake block rotates and abuts against the cable reel body, and then the brake screw is tightened. After tightening, the cable reel body remains stationary due to friction. To allow the cable reel body to rotate, the brake screw is loosened to change the contact friction between the brake block and the cable reel body, thus controlling the rotation speed of the cable reel body.

[0017] Preferably, a number of aluminum rods are also connected at intervals on the main body of the cable reel, the aluminum rods are on the same side as the fixing block, and a disk is provided on one side of the aluminum rods.

[0018] By adopting the above technical solution, when the disk has a stable magnetic field (magnetic field lines start from one pole of the disk and return to the other pole), the aluminum rod will cut the magnetic field lines relative to the magnetic field when it rotates with the cable reel. Because "the magnetic flux in the area where the aluminum rod is located changes with rotation", eddy currents (closed induced currents) are generated inside the aluminum rod.

[0019] According to Lenz's law, eddy currents are subject to the Ampere force of the magnetic field, and the direction of this Ampere force is always opposite to the direction of the relative motion of the aluminum rod ("resisting" the relative motion of the eddy currents), thus producing a "braking" effect on the aluminum rod—ultimately applying resistance to the cable reel through the aluminum rod, slowing down its rotation speed.

[0020] This "aluminum rod + disk" structure is often used in engineering for the speed control of the cable reel body (such as during cable laying / reeling): the resistance generated by electromagnetic damping prevents the cable reel body from rotating too fast due to inertia (such as when the cable suddenly loosens during laying or when it is excessively pulled during reeling), thus stabilizing the speed.

[0021] Preferably, it also includes a sealing plate, which is detachably connected to the base and located near the side where the sprocket is located. The sealing plate is used to block the sprocket and the chain.

[0022] By adopting the above technical solution, the sealing plate can shield components such as sprockets and chains, preventing debris or other objects from entering the drive assembly and improving the safety of equipment operation. Furthermore, when the drive assembly malfunctions or is damaged, the sealing plate can be removed for repair.

[0023] Preferably, it also includes a handrail and a power distribution box. The handrail is located on the base and is used for workers to grip and push. The power distribution box is located below the handrail and is used to distribute electrical energy from the power source to the servo motor.

[0024] By adopting the above technical solution, the staff applies force to the handrail, thereby pushing the entire machine base.

[0025] Preferably, it also includes a pneumatic cylinder and a toothed plate, the pneumatic cylinder being disposed on the sealing plate, the toothed plate being connected to the piston rod of the pneumatic cylinder, and the toothed plate having a plurality of teeth on the side facing the ground.

[0026] By adopting the above technical solution, when the machine base does not need to move, in order to increase the static friction between the machine base and the ground, the pneumatic cylinder can be operated to control the toothed plate to move in the direction close to the ground, so that the toothed plate comes into contact with the ground, thereby increasing the static friction between the machine base and the ground and improving the stability of the machine base. When it is necessary to control the movement of the machine base, the pneumatic cylinder is operated to control the toothed plate to move away from the ground.

[0027] Preferably, a square head is connected to the end of the rotating shaft away from the sprocket, and the square head is used for the operator to manually rotate the rotating shaft.

[0028] By adopting the above technical solution, since the servo motor requires a power supply, the device can operate by manually cranking the square head if there is no power. To facilitate better application of force to the square head, a crank handle can be fixedly connected to it.

[0029] In summary, this application includes at least one of the following beneficial technical effects: (1) By setting multiple rollers at the bottom of the base, it is convenient for staff to transport the entire cable reel and move the cable reel to the required location.

[0030] (2) By setting a pin on the cable reel body, when the pin is inserted into the slot of the bushing, the cable reel body and the rotating shaft are connected as one, and the corresponding cable reel body will rotate with the rotating shaft; otherwise, if the pin is not inserted into the bushing, the cable reel body will rotate relative to the rotating shaft, so as to realize the individual control of each cable reel body.

[0031] (3) By setting a braking component, the braking component can limit the rotation of the cable reel body during transportation, improve stability, and prevent the cable from being damaged by the inertial rotation of the cable reel body. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the electric cable reel in the embodiments of this application; Figure 2 This is a schematic diagram of the cable reel assembly and drive assembly in the embodiments of this application; Figure 3 This is a schematic diagram of the electric cable reel without rollers in an embodiment of this application; Figure 4 This is a partial structural schematic diagram of the electric cable reel in an embodiment of this application; Figure 5 This is a schematic diagram of the cable reel assembly and braking assembly in the embodiments of this application; Figure 6 This is a schematic diagram of the structure of the fixing block and the pin in the embodiment of this application; Figure 7 This is a schematic diagram of the structure of an electric cable reel in another embodiment of this application.

[0033] Reference numerals: 1. Base; 2. Cable reel assembly; 21. Cable reel body; 22. Fixing block; 23. Pin; 231. Straight segment; 232. Arc segment; 24. Fastener; 3. Drive assembly; 31. Servo motor; 32. Rotary shaft; 33. Sprocket; 34. Chain; 4. Roller; 5. Bushing; 6. Slot; 7. Strip hole; 8. Braking assembly; 81. Mounting bracket; 82. Braking block; 83. Braking screw; 9. Aluminum rod; 10. Disk disk; 11. Sealing plate; 12. Handrail; 13. Distribution box; 14. Pneumatic cylinder; 15. Toothed plate; 16. Square head. Detailed Implementation

[0034] The technical solutions of this application will now be described with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can be embodied in many different forms and is not limited to the embodiments described herein.

[0035] In the representation of this application, the reference to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means that a specific feature, structure, material, or characteristic represented in connection with that embodiment or example is included in at least one embodiment or example of this application. Moreover, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0037] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection; a detachable connection; an integral part; or a mechanical connection. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0038] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Without conflict, those skilled in the art can combine and integrate the different embodiments or examples shown in this application, as well as the features of those embodiments or examples.

[0039] This application discloses a portable electric cable reel. (Refer to...) Figures 1 to 3 The electric cable reel includes a base 1, a cable reel assembly 2, a drive assembly 3, and several rollers 4. The base 1 serves as a carrier, and both the cable reel assembly 2 and the drive assembly 3 are mounted on the base 1. The drive assembly 3 is connected to the cable reel assembly 2 and is used to drive the cable reel assembly 2 to rotate. The cable reel assembly 2 is used for winding and unwinding cables. The rollers 4 are rotatably connected to the bottom of the base 1, and multiple rollers 4 are provided. In this embodiment, there are four rollers 4, all of which are located in the same plane and distributed at the four corners of the base 1.

[0040] Specifically, the drive assembly 3 includes a servo motor 31, a rotating shaft 32, a sprocket 33, and a chain 34. The rotating shaft 32 is horizontally positioned and rotatably connected to the base 1 via a bearing seat. A sprocket 33 is coaxially connected to the rotating shaft 32. The output shaft of the servo motor 31 is coaxially connected to the sprocket 33, and the two sprockets 33 are connected by the chain 34. The cable reel assembly 2 is mounted on the rotating shaft 32. When the servo motor 31 is running, its output shaft rotates. Under the action of the chain 34 and the sprocket 33, the rotating shaft 32 rotates, thereby driving the cable reel assembly 2 to rotate. In some embodiments, a square head 16 is fixedly connected to the end of the rotating shaft 32 away from the sprocket 33. The square head 16 is used for manual rotation of the rotating shaft 32 by the operator. Since the servo motor 31 requires a power supply, if there is no power, the device can operate by manually cranking the square head 16. This combination of manual and electric operation improves the flexibility of use.

[0041] Combination Figures 4 to 6 The cable reel assembly 2 includes a cable reel body 21, a fixing block 22, a pin 23, and a fastener 24. The cable reel body 21 is I-shaped and is mounted on a rotating shaft 32 via ball bearings. The fixing block 22 is fixedly connected to one side of the cable reel body 21, and the pin 23 is movably connected to the fixing block 22. The fastener 24 is mounted on the fixing block 22 and is used to fix the pin 23, thereby restricting the movement of the pin 23. A bushing 5 is sleeved on the rotating shaft 32, and a slot 6 is provided on the bushing 5 for the pin 23 to be inserted. A sliding groove is provided through the fixing block 22. The pin 23 includes a straight segment 231 and an arc segment 232 connected to each other. The straight segment 231 is movably disposed in the sliding groove, and the arc segment 232 is located outside the sliding groove. The end of the straight segment 231 away from the arc segment 232 is engaged in the slot 6. A strip-shaped hole 7 is also provided through the straight section 231. The fastener 24 is a fastening bolt, which passes through the strip-shaped hole 7 and is screwed onto the nut preset on the fixing block 22. Among them, two cable reel assemblies 2 are installed on one rotating shaft 32; two rotating shafts 32 are arranged in parallel, and the two rotating shafts 32 are distributed vertically and are both connected to the servo motor 31.

[0042] Workers can apply external force to the arc-shaped segment 232, causing the straight segment 231 to move linearly within the groove, thereby controlling the straight segment 231 to be inserted into the slot 6. Then, a fastening bolt is passed through the strip hole 7 of the straight segment 231 and screwed onto the nut to lock the straight segment 231, preventing it from coming out of the slot 6 and ensuring the firmness of the connection between the pin 23 and the bushing 5.

[0043] The cable reel body 21 consists of upper and lower layers. Two cable reel bodies 21 are connected to a rotating shaft 32, and the four cable reel bodies 21 generally do not operate simultaneously. During use, when the operator inserts the control pin 23 into the slot 6 of the bushing 5, the cable reel body 21 and the rotating shaft 32 become integrated, and the corresponding cable reel body 21 will rotate with the rotating shaft 32. Conversely, if the pin 23 is not inserted into the bushing 5, due to the presence of the ball bearing, the cable reel body 21 will rotate relative to the rotating shaft 32, meaning the cable reel body 21 will not rotate with the rotating shaft 32, thus achieving individual control of the four cable reel bodies 21.

[0044] After the cable reel body 21 is wound up, it needs to remain stable during transportation (driving) to prevent damage to the cable due to inertial rotation. In this embodiment, a braking assembly 8 is also installed on the base 1. The braking assembly 8 is used to limit the rotation of the cable reel body 21 to prevent damage to the cable during transportation. The braking assembly 8 includes a mounting bracket 81, a braking block 82, and a braking screw 83. The mounting bracket 81 is fixedly connected to the base 1, and the braking block 82 is rotatably connected to the mounting bracket 81 and is used to contact the cable reel body 21. One end of the braking screw 83 passes through the braking block 82 and locks the braking block 82 onto the mounting bracket 81. The braking screw 83 is threadedly connected to the mounting bracket 81. During braking, the braking block 82 is controlled to rotate and abut against the cable reel body 21, and then the braking screw 83 is tightened. After the braking screw 83 is tightened, the cable reel body 21 can remain fixed due to friction. When you want the cable reel body 21 to rotate, you can loosen the brake screw 83 to change the contact friction force between the brake block 82 and the cable reel body 21, thereby controlling the rotation speed of the cable reel body 21.

[0045] The cable reel body 21 is also equipped with several aluminum rods 9 spaced apart, each circumferentially distributed. The aluminum rods 9 and the fixing block 22 are on the same side. A disk 10 is also installed on one side of the aluminum rods 9. The disk 10 is hollow, and the rotating shaft 32 passes through the disk 10. When the disk 10 carries a stable magnetic field, the aluminum rods 9 rotate with the cable reel, cutting magnetic field lines relative to the magnetic field, thus generating eddy currents inside the aluminum rods 9. According to Lenz's law, the eddy currents are subjected to the Ampere force of the magnetic field, and the direction of this Ampere force is always opposite to the direction of the relative motion of the aluminum rods 9 ("opposing" the relative motion that causes the eddy currents). Therefore, it has a "braking" effect on the aluminum rods 9, thereby controlling the rotational speed of the cable reel body 21.

[0046] In addition, a sealing plate 11, a handrail 12, and a power distribution box 13 are also installed on the base 1. The sealing plate 11 is detachably connected to the base 1 and is located near the sprocket 33. The sealing plate 11 is fixed to the base 1 by bolts and serves to block the sprocket 33 and chain 34. The sealing plate 11 prevents debris or other objects from entering the drive assembly 3, improving the safety of the equipment during operation. When the drive assembly 3 malfunctions, the sealing plate 11 can be removed for maintenance. The handrail 12 is fixedly connected to the base 1 and is used by the operator to apply pushing force to the base 1, thereby controlling the movement of the entire base 1 on the ground. The power distribution box 13 is located below the handrail 12 and is used to distribute electrical energy from the power supply to the servo motor 31, ensuring the stability of the servo motor 31's operation.

[0047] In some embodiments, refer to Figure 7 A pneumatic cylinder 14 is also installed on the sealing plate 11. The piston rod of the pneumatic cylinder 14 is connected to a toothed plate 15. The pneumatic cylinder 14 is used to control the vertical movement of the toothed plate 15. The toothed plate 15 has several teeth on the side facing the ground. When the machine base 1 does not need to move, in order to increase the static friction between the machine base 1 and the ground, the pneumatic cylinder 14 can be operated to control the toothed plate 15 to move in the direction close to the ground, so that the toothed plate 15 is in contact with the ground, thereby increasing the static friction between the machine base 1 and the ground and improving the stability of the machine base 1. When the machine base 1 needs to move, the toothed plate 15 can be controlled to detach from the ground.

[0048] The implementation principle of a portable electric cable reel in this application embodiment is as follows: Four rollers 4 are installed at the bottom of the base 1, and the rollers 4 are fixed to the four corners of the base 1 by tapping. The presence of the rollers 4 facilitates the transportation of the entire cable reel by the staff, moving the cable reel to the required position, thus realizing the portable movement function of the electric cable reel. In use, when the staff controls the pin 23 to be inserted into the slot 6 of the bushing 5, the cable reel body 21 and the rotating shaft 32 are connected as one unit, and the corresponding cable reel body 21 will rotate with the rotating shaft 32 to realize the cable winding and unwinding. Conversely, if the pin 23 is not inserted into the bushing 5, the cable reel body 21 will rotate relative to the rotating shaft 32, that is, the cable reel body 21 will not rotate. The application scenario where the cable reel body 21 does not need to rotate is as follows: When the broadcasting vehicle is broadcasting, when the optical cable is already connected to the camera, the cable reel body 21 does not need to rotate, otherwise it will affect the operation of the camera.

[0049] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A portable electric cable reel, characterized in that, It includes a base (1), a cable reel assembly (2), a drive assembly (3) and several rollers (4). The cable reel assembly (2) and the drive assembly (3) are both located on the base (1). The drive assembly (3) is connected to the cable reel assembly (2) and is used to drive the cable reel assembly (2) to rotate. The rollers (4) are rotatably connected to the bottom of the base (1). The rollers (4) are spaced apart and located in the same plane.

2. The portable electric cable reel according to claim 1, characterized in that, The drive assembly (3) includes a servo motor (31), a rotating shaft (32), a sprocket (33), and a chain (34). The rotating shaft (32) is horizontally arranged and rotatably connected to the base (1). The sprocket (33) is coaxially connected to the rotating shaft (32). The output shaft of the servo motor (31) is coaxially connected to the sprocket (33). The two sprockets (33) are connected by the chain (34). The cable reel assembly (2) is located on the rotating shaft (32).

3. A portable electric cable reel according to claim 2, characterized in that, The cable reel assembly (2) includes a cable reel body (21), a fixing block (22), a pin (23) and a fastener (24). The cable reel body (21) is mounted on the rotating shaft (32) by ball bearings. The fixing block (22) is located on one side of the cable reel body (21), the pin (23) is movably connected to the fixing block (22), the fastener (24) is located on the fixing block (22) and is used to fix the pin (23); a bushing (5) is sleeved on the rotating shaft (32), and a slot (6) is provided on the bushing (5) for the pin (23) to be inserted; At least two cable reel assemblies (2) are provided on the rotating shaft (32), and two rotating shafts (32) are arranged in parallel.

4. A portable electric cable reel according to claim 3, characterized in that, The fixing block (22) has a through groove. The pin (23) includes a straight segment (231) and an arc segment (232) connected to each other. The straight segment (231) is movably disposed in the groove, and the arc segment (232) is located outside the groove. The end of the straight segment (231) away from the arc segment (232) is engaged in the slot (6). The straight segment (231) has a strip hole (7). The fastener (24) is a fastening bolt. The fastening bolt passes through the strip hole (7) and is screwed onto a nut preset on the fixing block (22).

5. A portable electric cable reel according to claim 3, characterized in that, It also includes a braking assembly (8), which is mounted on the base (1) and is used to restrict the rotation of the cable reel body (21). The braking assembly (8) includes a mounting bracket (81), a braking block (82) and a braking screw (83). The mounting bracket (81) is mounted on the base (1). The braking block (82) is rotatably connected to the mounting bracket (81) and is used to contact the cable reel body (21). The braking screw (83) is used to lock the braking block (82) on the mounting bracket (81).

6. A portable electric cable reel according to claim 3, characterized in that, The cable reel body (21) is also connected with several aluminum rods (9) at intervals. The aluminum rods (9) and the fixing block (22) are on the same side. A disk (10) is also provided on one side of the aluminum rods (9).

7. A portable electric cable reel according to claim 2, characterized in that, It also includes a sealing plate (11), which is detachably connected to the base (1) and close to the side where the sprocket (33) is located. The sealing plate (11) is used to block the sprocket (33) and the chain (34).

8. A portable electric cable reel according to claim 2, characterized in that, It also includes a handrail (12) and a power distribution box (13). The handrail (12) is located on the base (1) and is used for workers to grip and push. The power distribution box (13) is located below the handrail (12) and is used to distribute electrical energy from the power source to the servo motor (31).

9. A portable electric cable reel according to claim 7, characterized in that, It also includes a pneumatic cylinder (14) and a toothed plate (15). The pneumatic cylinder (14) is located on the sealing plate (11), and the toothed plate (15) is connected to the piston rod of the pneumatic cylinder (14). The toothed plate (15) has several teeth on the side facing the ground.

10. A portable electric cable reel according to claim 2, characterized in that, The rotating shaft (32) is connected to a square head (16) at the end away from the sprocket (33), and the square head (16) is used for the operator to manually rotate the rotating shaft (32).

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