Electric cable shears and working device thereof

Abstract

The utility model belongs to the technical field of electric tools, and particularly relates to an electric cable shear and a working device thereof. Comprising a movable cutter and a fixed cutter; the driving mechanism is used for driving the movable cutter to move and is provided with a gear box comprising a gear box shell; the output end of the motor is mounted on the gearbox shell; the transmission assembly is mounted between the output end of the motor and the input end of the gearbox; the end cover and one end of the gear box shell are installed, and a closed containing cavity for containing the transmission assembly is formed between the end cover and the gear box shell. The end cover is mounted at one end of the gearbox shell, and the closed accommodating cavity for accommodating the transmission component is formed between the end cover and the gearbox shell, so that the whole transmission component can be surrounded by the end cover.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electric tool technical field, concretely relates to a kind of electric cable cutter and its working device. BACKGROUND

[0002] Electric tool is a kind of tool that is powered by power supply, and the working head at the front end is driven by driving mechanism to work. In pipeline, power and other construction operations, for example, cable cutting tool, there are many electric cable cutters on the market that are specially used for cutting cables, such as the electric cable cutter proposed in Chinese utility model patent CN210715767U, which drives the output of the reduction mechanism by the motor, drives the rotating of the moving blade, and gradually reduces the working area between the moving blade and the fixed blade to realize the cutting of the cable. Although it can cut, it has some defects in actual use, such as: the transmission gear between the motor and the planetary gear box is exposed, although a casing is arranged on the outside of the motor and gear box, since there are holes such as heat dissipation holes on the casing, metal chips generated during cutting and impurities in the external working environment often enter during actual use, causing abnormal transmission of the gear, and even failure. At the same time, due to the open gear transmission, the lubricating grease on the tooth surface is easily thrown off at high speed, which easily causes abnormal wear due to poor lubrication and affects the service life of the tool. CONTENT OF THE UTILITY MODEL

[0003] To solve the above problems, the utility model provides an electric cable cutter and its working device, which sets an end cover on the gear box shell, so that the transmission assembly can be built-in in the closed accommodating cavity formed between the end cover and the gear box shell.

[0004] The utility model adopts the following technical scheme:

[0005] The utility model provides a working device of electric cable cutter, which has the following characteristics: a cutter head mechanism including a moving blade and a fixed blade; a driving mechanism for driving the moving blade to move, including a gear box with an output end combined with the moving blade to drive the moving blade to rotate, and a gear box shell; a motor with an output end mounted on the gear box shell; a transmission assembly installed between the output end of the motor and the input end of the gear box; and an end cover mounted on one end of the gear box shell and forming a closed accommodating cavity with the gear box shell to accommodate the transmission assembly.

[0006] In the working device of electric cable cutter proposed in the utility model, the end cover is detachably mounted on the end face of the gear box shell by a plurality of first fixing members, and the motor is detachably mounted on the gear box shell by a second fixing member.

[0007] The utility model discloses an electric cable cutter's working device has such characteristics in the utility model, and the hole position for the second fixed part outer end is exposed is set up on the end cover.

[0008] The utility model discloses an electric cable cutter's working device has such characteristics in the utility model, and the motor is located the side of gear box, and the motor is brush motor or brushless motor, when the motor is brush motor, brush motor directly passes through second fixed part and is installed on the gear box casing, and second fixed part passes through gear box casing and inserts brush motor, when the motor is brushless motor, brushless motor passes through second fixed part and is installed on the gear box casing with adapter flange, and second fixed part passes through gear box casing, adapter flange and inserts brushless motor in proper order.

[0009] The utility model discloses an electric cable cutter's working device has such characteristics in the utility model, and one end of fixed knife is fixedly arranged in the one end of gear box casing away from the end cover, and the other end of fixed knife is movably connected with movable knife through connecting component, and connecting component has: connecting pin, passes through fixed knife and movable knife and contains stop portion and locking portion, locking block is fixed on the end face of locking portion through screw, and locking piece is set up in locking portion and locking block outer periphery.

[0010] The utility model discloses an electric cable cutter's working device has such characteristics in the utility model, and transmission assembly has: motor output wheel, is installed on the motor shaft of motor, gear box input wheel and connecting gear, connecting motor output wheel and gear box input wheel, wherein, connecting gear contains motor connecting wheel with the meshing of motor output wheel and gear box connecting wheel with the mutual meshing of gear box input wheel, and motor connecting wheel and gear box connecting wheel are coaxial arrangement.

[0011] The utility model discloses an electric cable cutter's working device has such characteristics in the utility model, and the middle part of connecting gear is inserted with the installation shaft, and one end of the installation shaft is inserted on the end cover, and the other end is inserted on the gear box casing, and the both end faces of connecting gear are equipped with gaskets between gear box casing and end cover.

[0012] The utility model discloses an electric cable cutter's working device has such characteristics in the utility model, and movable knife has: blade main body, movable knife edge, sets up the one side of blade main body towards fixed knife and forms the working area for the shearing target to pass between fixed knife, rack, sets up the one side of blade main body away from fixed knife, and the gear box output wheel of the output end of gear box is engaged, and buffer tooth is installed on the first end and the end of rack, and the side of fixed knife away from movable knife is equipped with protective cover.

[0013] The utility model also proposes a kind of electric cable cutter, with such features, comprising: machine body;Work device and control device, install on machine body;And power supply device, detachably installed at the end of machine body away from work device;Wherein, work device is the work device of the electric cable cutter as described above.

[0014] In the electric cable cutter proposed in the utility model, the machine body is hollow inside, and has an upper machine body portion coated outside the driving mechanism, a hand-held portion for a user to hold, and a lower machine body portion for connecting with the power supply device.

[0015] In the electric cable cutter proposed in the utility model, the control switch is a lever reversing switch.

[0016] Effects of the utility model

[0017] According to the electric cable cutter and the work device thereof of the utility model, since the end cover is installed at one end of the gear box shell, and a closed containing cavity accommodating the transmission assembly is formed between the end cover and the gear box shell, the end cover can surround the entire transmission assembly inside, which can avoid the entry of metal chips generated during the shearing process and impurities in the external working environment to cause the transmission assembly to be abnormal, and can also avoid the lubricating grease of the tooth surface being thrown out at high speed, so that the components are not easy to wear, and the service life of the tool is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic view of the electric cable cutter of the utility model.

[0019] Figure 2 is a structural schematic view of the electric cable cutter of the utility model after hiding half of the shell.

[0020] Figure 3 is a structural schematic view of the work device of embodiment 1 of the utility model.

[0021] Figure 4 is a structural schematic view of the work device of embodiment 1 of the utility model.

[0022] Figure 5 is a sectional view of the driving mechanism of embodiment 1 of the utility model.

[0023] Figure 6 is a structural schematic view of the driving mechanism of embodiment 1 of the utility model after removing the end cover.

[0024] Figure 7The end cover mounting structure schematic view of the utility model is shown.

[0025] Figure 8 The cross section schematic view of the utility model knife head mechanism mounting structure is shown.

[0026] Figure 9 The motor mounting structure schematic view of the utility model embodiment 2 is shown.

[0027] Reference signs: machine body 10, upper machine body part 11, handheld part 12, lower machine body part 13, working device 20, moving cutter 21, cutter blade main body 211, moving cutter edge 212, rack 213, buffer tooth 214, fixed cutter 22, working area 220, first fixed end 221, second fixed end 222, protective cover 223, fixed cutter edge 224, gear box 23, gear box output wheel 231, motor 24, motor shaft 241, end cover 25, hole site 251, closed containing cavity 251, gear box shell 26, planetary wheel assembly 27, transmission assembly 28, motor output wheel 281, gear box input wheel 282, connecting gear 283, motor connecting wheel 2831, gear box connecting wheel 2832, mounting shaft 2833, gasket 29, control device 30, control board 31, control switch 32, control button 33, display screen 34, indicating lamp button 35, power supply device 40, screw 51, bolt 52, fixed block 53, switching flange 54, connecting assembly 60, connecting pin 61, stop portion 611, locking portion 612, locking stopper 62, locking piece 63, fixing piece 64. DETAILED DESCRIPTION

[0028] In order to make the technical means, creation features, purposes and effects of the utility model easy to understand, the electric cable cutter and its working device of the utility model are specifically described below in combination with embodiments and drawings.

[0029] <Embodiment 1>

[0030] The embodiment proposes an electric cable cutter, like Figure 1As shown, the electric cable cutter comprises a body 10, a working device 20, a control device 30 and a power supply device 40 (such as a battery), the working device 20 and the control device 30 are installed on the body 10, and the working device 20 is located at one end of the body 10, and the other end of the body 10 away from the working device 20 is detachably installed with the power supply device 40. Wherein, the inside of the body 10 is hollowly arranged, having a shell, the shell is in front and back two half type, the front and back two half shells are fixed to each other by screws, in the vertical direction, the body 10 is further divided into an upper body part 11 covering part of the working device 20 outside, a hand holding part 12 for user to hold and a lower body part 13 for connecting with the power supply device 40. The control device 30 comprises a control board 31 installed in the lower body part 13, a control switch 32 installed in the inside of the hand holding part 12 and a control button 33 movably installed outside the hand holding part 12. The control board 31 is electrically connected with the control switch 32, the motor in the working device 20 and the power supply device 40, the control switch 32 adopts a lever reversing switch, and the control button 33 is linked with the control switch 32 for controlling the opening and closing of the switch. Correspondingly, in order to facilitate the user to use and observe, a display screen 34 can also be arranged at the lower body part 13 for displaying relevant parameters, and an illumination button 35 can be arranged at the upper body part 11.

[0031] Specifically, as shown, Figure 2 The working device 20 comprises a cutter head mechanism and a driving mechanism, the cutter head mechanism contains a movable cutter 21 and a fixed cutter 22; the driving mechanism is used for driving the movable cutter 21 to move, and has a gear box 23, a motor 24, an end cover 25 and a transmission assembly 28, the output end of the gear box 23 is combined with the movable cutter 21 and drives the movable cutter 21 to rotate, the gear box 23 contains a gear box shell 26 and a planetary wheel assembly 27; the output end of the motor 24 is installed on the gear box shell 26, that is, the motor 24 is detachably installed on the end face of the gear box shell 26 through a second fixing member (bolt 52 or screw). The transmission assembly 28 is installed between the output end of the motor 24 and the input end of the gear box 23, and drives the planetary wheel assembly 27 to output through the output of the motor 24 and the transmission of the transmission assembly, so as to drive the movable cutter 21 to move. The end cover 25 is installed with one end of the gear box shell 26 and forms a closed containing cavity 251 between the end cover 25 and the gear box shell 26 for containing the transmission assembly 28, the transmission assembly 28 is built-in in the closed containing cavity 251, the closed arrangement makes it difficult for external metal chips and other impurities to enter the inside to avoid affecting the work of the transmission assembly 28, and at the same time, it can prevent the lubricating grease on the surface of the transmission assembly 28 from being thrown out due to high-speed rotation in the working process, so that the parts are not easy to wear and tear, prolonging the service life of the tool. It should be noted that the closed containing cavity described here does not necessarily have to be completely sealed, that is, the connection between the end cover 25 and the gear box shell 26 can be directly connected and does not necessarily add a sealing ring to form a seal. As Figure 3As shown, the end cover 25 is detachably mounted on the end face of the gear box shell 26 by a plurality of first fixing members (screws 51 or bolts), the inner end of the first fixing member is inserted into the gear box shell 26 through the end cover to achieve mounting, when the transmission assembly needs to be repaired or maintained, only the screws 51 need to be unscrewed, and then the end cover 25 can be detached, which is very convenient.

[0032] The motor 24 and the gear box 23 are designed as independent units, and the motor 24 is located beside the gear box 23, in this embodiment, the motor 24 is a brush motor, which is directly mounted on the gear box shell 26 by bolts 52 or screws, and the motor 24 and the gear box shell 26 are quickly connected and can be quickly detached by positioning through the shaft hole and fixing by screws. When assembling, the gear box 23 can be pre-installed, and the motor 24 is finally installed, which simplifies the installation process and shortens the installation time. Figure 7 As shown, the end cover 25 is detachably mounted on the end face of the gear box shell 26 by a plurality of first fixing members (screws 51 or bolts), the inner end of the first fixing member is inserted into the gear box shell 26 through the end cover to achieve mounting, when the transmission assembly needs to be repaired or maintained, only the screws 51 need to be unscrewed, and then the end cover 25 can be detached, which is very convenient.

[0033] The transmission assembly 28 has a motor output wheel 281, a gear box input wheel 282 and a connecting gear 283, the motor output wheel 281 is mounted on the motor shaft 241 of the motor 24; the gear box input wheel 282 is mounted on the planetary gear assembly 27; the connecting gear 283 connects the motor output wheel 281 and the gear box input wheel 282; wherein the connecting gear 283 contains a motor connecting wheel 2831 meshing with the motor output wheel 281 and a gear box connecting wheel 2832 meshing with the gear box input wheel 282, the motor connecting wheel 2831 and the gear box connecting wheel 2832 are stacked up and down along the axial direction, and coaxially arranged. The connecting gear 283 has an installation shaft 2833 inserted in the middle, one end of the installation shaft 2833 is inserted into the end cover 25, and the other end is inserted into the gear box shell 26, and the two end faces of the connecting gear 283 are provided with gaskets 29 between the gear box shell 26 and the end cover 25, to avoid the contact and wear of the connecting gear 283 and the gear box shell 26 and the end cover 25.

[0034] As shown, Figure 5 The planetary gear assembly 27 is a three-stage planetary structure, one end is combined with the gear box input wheel 282, and the other end is combined with the gear box output wheel 231, and the internal planetary gear set adopts angular displacement gear teeth design to improve the carrying capacity of the gear. Figure 4 and Figure 5As shown, one end (first fixed end 221) of the fixed blade 22 is fixedly arranged at one end of the gear box shell 26 away from the end cover 25 through the fixed block 53, and the other end (second fixed end 222) of the fixed blade 22 is movably connected with the moving blade 21 through the connecting assembly 60. Figure 2 And Figure 8 As shown, the connecting assembly 60 has a connecting pin 61, a locking block 62 and a locking piece 63. One end of the connecting pin 61 penetrates the fixed blade 22 and the moving blade 21 and contains a stop portion 611 and a locking portion 612. The locking block 62 is fixed on the end face of the locking portion 612 through a fixing piece 64 (such as a screw or a bolt), and the locking piece 63, which can be a locking nut, is sleeved on the outer periphery of the locking portion 612 and the locking block 62, and the locking portion 612 and the locking block 62 are locked by tightening the locking piece 63. It should be noted that the locking here only strengthens the connection between the fixed blade and the moving blade, and is not locked, and the fixed blade 22 and the moving blade 21 can rotate relative to each other with the connecting pin 61 as the shaft.

[0035] As shown, Figure 4 The moving blade 21 has a blade body 211, a moving blade edge 212, a rack 213 and a buffer tooth 214. The moving blade edge 212 is arranged on the side of the blade body 211 facing the fixed blade 22 and forms a working area 220 with the fixed blade 22 for the shearing target to pass through. The rack 213 is arranged on the side of the blade body 211 away from the fixed blade 22 and is arc-shaped, engaged with the gear box output wheel 231 of the output end of the gear box 23. The buffer tooth 214 is provided with a pair of buffer teeth 214, respectively installed on the first end and the last end of the rack 213. The side of the fixed blade 22 away from the moving blade 21 is also provided with a protective cover 223, and the side of the fixed blade 22 facing the moving blade 21 is provided with a fixed blade edge 224, which cooperates with the moving blade edge 212 to realize shearing. The initial position of the moving blade 21 can be preset in this embodiment. After rotating by the driving of the driving mechanism and completing the shearing work, the moving blade 21 will return to the initial position.

[0036] <Embodiment 2>

[0037] The difference between this embodiment and the above-mentioned embodiment 1 is that the motor 24 is a brushless motor. The installation method of the brushless motor is slightly different from that of the above-mentioned brush motor, that is, as shown, Figure 9 The brushless motor is installed on the gear box shell 26 through the adapter flange 54. The adapter flange 54 is a whole disc type. The second fixing piece (bolt or screw) is inserted into the brushless motor in sequence through the gear box shell 26 and the adapter flange 54, so as to install the brushless motor.

[0038] Effects of the embodiment:

[0039] According to the electric cable cutter of the above embodiment, since the end cover 25 is installed at one end of the gear box shell 26, and the closed containing cavity 251 containing the transmission assembly 28 is formed between the end cover 25 and the gear box shell 26, the end cover 25 can surround the entire transmission assembly 28 inside, which can avoid the abnormality of the transmission assembly caused by the metal chips generated in the cutting process and the impurities in the external working environment, and can also avoid the lubricating grease of the tooth surface being thrown out at high speed, so that the components are not easy to wear and the service life of the tool is prolonged.

[0040] Further, the motor 24 and the gear box shell 26 are quickly connected through shaft hole positioning and screw fixing, and can be quickly disassembled. When the tool is assembled, the gear box 23 can be pre-installed, and the motor 24 is finally installed, which simplifies the installation process and shortens the installation time. The end cover 25 also has a hole position 251 corresponding to the position of the second fixing member (bolt 52 or screw), which is used to expose the outer end of the second fixing member. When the motor needs to be disassembled, only the screwdriver needs to be inserted into the hole position to rotate the bolt 52, and the motor 24 can be disassembled alone without disassembling the end cover 25 and the gear box, which reduces the difficulty and time cost of maintenance.

[0041] Further, the air inlet at the front end of the brush motor or the air outlet at the front end of the brushless motor can be used to carry away the heat generated by the gear box 23 under high load, which has a good heat dissipation effect, especially at high speed when the blade is close to the cable or during the retraction process, and the motor load is not large.

[0042] The above embodiments are only used to illustrate the specific implementation mode of the utility model, and the utility model is not limited to the description range of the above embodiments.

Claims

1. Operating device of an electric cable cutter, characterized in that The utility model relates to a kind of electric cable cutter, including: Cutter head mechanism, containing moving knife and fixed knife; Driving mechanism, for driving the moving knife to move, and have: Gear box, its output end is combined with the moving knife to drive the moving knife to rotate, and contain gear box shell; Motor, its output end is installed on the gear box shell; Transmission assembly, installed between the output end of the motor and the input end of the gear box; And End cover, with one end of the gear box shell is installed and between the gear box shell form the closed containing cavity containing the transmission assembly.

2. The working device of the electric cable cutter according to claim 1, characterized in that, The end cover is detachably mounted on the end face of the gear box shell by a plurality of first fixing members, and the motor is detachably mounted on the gear box shell by a second fixing member.

3. The working device of the electric cable cutter according to claim 2, characterized in that, A hole is formed on the end cover for the second fixing member to protrude.

4. A working device of an electric cable cutter according to claim 2 or 3, characterized in that, The motor is located beside the gear box, and the motor is a brush motor or a brushless motor, When the motor is a brush motor, the brush motor is directly mounted on the gear box shell through the second fixing member, and the second fixing member is inserted into the brush motor through the gear box shell. When the motor is a brushless motor, the brushless motor is mounted on the gear box shell through the second fixing member and an adapter flange, and the second fixing member is sequentially inserted into the brushless motor through the gear box shell, the adapter flange.

5. The working device of the electric cable cutter according to any one of claims 1 to 3, characterized in that, One end of the fixed knife is fixedly arranged on the end of the gear box shell away from the end cover, and the other end of the fixed knife is movably connected to the moving knife through a connecting assembly. The connecting assembly has: A connecting pin penetrates the fixed knife and the moving knife, and has a stop portion and a locking portion; A locking block is fixed on the end face of the locking portion by a screw;And A locking member is sleeved on the locking portion and the outer periphery of the locking block.

6. The working device of the electric cable cutter according to any one of claims 1-3, wherein The transmission assembly has: A motor output wheel mounted on the motor shaft of the motor; A gear box input wheel;And A connecting gear connecting the motor output wheel and the gear box input wheel; 7. The working device of the electric cable cutter according to claim 6, characterized in that, The connecting gear contains a motor connecting wheel meshing with the motor output wheel and a gear box connecting wheel meshing with the gear box input wheel, and the motor connecting wheel and the gear box connecting wheel are coaxially arranged.

8. The working device of the electric cable cutter according to claim 5, characterized in that, An installation shaft is inserted in the middle of the connecting gear, one end of the installation shaft is inserted into the end cover, and the other end of the installation shaft is inserted into the gear box shell, and a gasket is arranged between the two end faces of the connecting gear and the gear box shell and the end cover. The moving knife has: A blade body, A moving knife edge arranged on the side of the blade body facing the fixed knife and forming a working area for the cutting target to pass through between the moving knife and the fixed knife; A rack arranged on the side of the blade body away from the fixed knife and meshing with the gear box output wheel of the output end of the gear box; And A buffer tooth mounted on the first end and the last end of the rack; 9. Electric cable cutter, characterized in that The side of the fixed knife away from the moving knife is provided with a protective cover. The utility model relates to a kind of electric cable cutter, including: Machine body; Working device and control device, installed on the machine body; And Power supply device, detachably mounted on the end of the machine body away from the working device. The working device is the working device of the electric cable cutter according to any one of claims 1-8.

10. The electric cable shears of claim 9, wherein, The machine body is internally hollow, has an upper machine body part wrapped outside the driving mechanism, a hand-held part for a user to hold, a lower machine body part for connecting with the power supply device, The control device comprises: A control switch installed in the hand-held part; A control panel installed in the lower machine body part and electrically connected with the control switch, the motor and the power supply device; and A control button movably installed outside the hand-held part and linked with the control switch. The control switch is a lever reversing switch.

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