An electric hand crank

Abstract

The present invention provides an electric hand crank, comprising a crank body, a shell movably mounted on the outside of the middle of the crank body and symmetrically, the crank body comprising a hand crank hook and a thick tube, an electric drive device is mounted inside the shell, the electric drive device comprises a movably mounted motor, a transmission mechanism, and an electric module, the transmission mechanism comprises a first bevel gear on the outer surface of the inner thick tube of the shell, a second bevel gear at the end of the motor output shaft, the electric module comprises a battery, a power control circuit board and a main circuit board stuck on the inner side of the shell, and the electric drive device also comprises a positioning mechanism. The electric hand crank described in the present invention can meet the needs of different working states, is relatively labor-saving, and has high working efficiency, can avoid the hand crank hook from working when not in use, is relatively safe to use, can change the length of the crank, and is suitable for different working scenes.

Description

Technical Field

[0001] The present invention relates to the technical field of hand cranks, and in particular to an electric hand crank. Background Art

[0002] Most hand cranks are divided into two structures: foldable and integral. The foldable one consists of a long rod, two short rods, and two rotating shafts. It can be pulled into a straight rod and folded into a hand crank. The integral one consists of a long rod and two rotating shafts to form a hand crank.

[0003] The existing hand crank is controlled by hand, which is laborious and inefficient, very inconvenient to use, and the length of the crank cannot be adjusted. In order to solve the above problems, we propose an electric hand crank. Summary of the invention

[0004] The purpose of the present invention is to provide an electric hand crank that can meet the needs of different working conditions, is relatively labor-saving, and has high work efficiency. It can avoid the hand crank hook from working when not in use. It is relatively safe to use, the length of the crank can be changed, and it is suitable for different working scenes.

[0005] The embodiment of the present invention is achieved as follows:

[0006] An embodiment of the present invention provides an electric hand crank, comprising a crank body, and a shell movably mounted symmetrically on the outer side of the middle part of the crank body, the crank body comprising a hand crank hook and a thick tube, an electric drive device being mounted inside the shell, the electric drive device comprising a movably mounted motor, a transmission mechanism, and an electric module, the transmission mechanism comprising a first bevel gear on the outer surface of the thick tube inside the shell, a second bevel gear at the end of the motor output shaft, the electric module comprising a battery, a power control circuit board and a main circuit board stuck on the inner side of the shell, the electric drive device also comprising a positioning mechanism, the positioning mechanism comprising a first motor locking piece on the outer side of the motor, a second motor locking piece penetrating the motor output shaft, and a motor moving piece on the top of the first motor locking piece.

[0007] Optionally, the crank body also includes a thin tube and a middle tube, the lower end of the hand crank hook is connected to the upper end of the thin tube, the outer side of the lower part of the thin tube is connected to the middle tube, and the middle tube is located on the inner side of the upper part of the thick tube, and a first adjustment mechanism is arranged between the thin tube and the middle tube, the first adjustment mechanism includes a locking sleeve and an internally threaded locking rotating part, the locking sleeve is an opening, the locking sleeve is on the outer side of the thin tube, and the upper side of the locking sleeve is circular and the lower side is twelve-sided, the bottom of the locking sleeve is adapted to the shape of the inner surface of the middle tube, the internal cross-section of the internally threaded locking rotating part is trapezoidal, the inner surface of the internally threaded locking rotating part is connected to the outer surface of the locking sleeve, and the inner surface of the lower part of the internally threaded locking rotating part is threadedly connected to the outer surface of the upper part of the middle tube, a thin tube hexagonal fixing piece is arranged on the inner side of the middle tube at the bottom of the thin tube, and a middle tube hexagonal fixing piece is arranged on the inner side of the thick tube at the bottom of the middle tube, and a second adjustment mechanism is arranged between the thick tube and the middle tube.

[0008] By adopting the above technical scheme, the length of the thin tube penetrating into the middle tube can be changed through the first adjusting mechanism, thereby changing the length of the crank, and the bottom of the thin tube can be locked by the thin tube hexagonal fixing piece to prevent the thin tube from rotating independently inside the middle tube, and the bottom of the middle tube can be locked by the middle tube hexagonal fixing piece to prevent the middle tube from rotating independently inside the thick tube, the fixation is relatively firm, and the transmission effect is better.

[0009] Optionally, the first bevel gear is fixed on the outside of the thick tube, two thick tube rotating shafts are arranged between the thick tube and the outer shell, the thick tube is movably connected to the outer shell via the thick tube rotating shaft, the first bevel gear is meshed with the second bevel gear, the second bevel gear is fixedly connected to the output shaft of the motor, the first motor locking piece is connected to the second motor locking piece by screws, and the motor moving piece is fixedly connected to the first motor locking piece by screws, an adjusting knob is clamped inside the rear outer shell of the motor moving piece, and the adjusting knob is threadedly connected to the motor moving piece.

[0010] By adopting the above technical solution, the motor can drive the thick pipe to rotate through the cooperation of the first bevel gear and the second bevel gear.

[0011] Optionally, a charging interface is installed on the upper end of the shell near the thick tube, and the charging interface is connected to the main circuit board through a wire. The power control circuit board is stuck in the plug position of the shell, and the surface of the power control circuit board is embedded in the inner wall of the shell and is covered with a power switch.

[0012] By adopting the above technical solution, the battery can be charged through the charging interface.

[0013] Optionally, the power control circuit board is connected to the main circuit board through a wire, a jog button is provided on the inner side of the shell, a button is provided on the inner side of the jog button on the surface of the main circuit board, the button and the main circuit board are connected through a wire, the jog button is sleeved on the surface of the button, the jog button is fixed to the screw point raised cylinder of the shell by screws, and the two groups of shells are fixed by screws.

[0014] By adopting the above technical solution, the motor can be started by pressing the button.

[0015] Optionally, a steering power supply is provided on the surface of the main circuit board, a steering switch is installed on the outside of the steering power supply, a battery rack is provided between the battery and the outer shell, and the positive and negative poles of the battery rack are electrically connected to the main circuit board.

[0016] By adopting the above technical solution, the steering power supply can be touched by toggling the steering switch, so that the motor rotates in the reverse direction.

[0017] Optionally, the lower end of the hand crank hook is fixedly connected to the upper end of the capillary tube, and the capillary tube is movably connected to the middle tube via a first adjustment mechanism.

[0018] Optionally, the middle tube and the thick tube are movably connected via a second adjusting mechanism, and the thin tube, the middle tube and the thick tube are all made of aluminum.

[0019] By adopting the above technical solution, the length of the middle tube in the thick tube can be adjusted through the second adjusting mechanism, thereby changing the length of the crank.

[0020] The beneficial effects of the embodiments of the present invention include: the embodiments of the present invention provide an electric hand crank, which is turned on by long pressing the power switch, and after turning on, the inching button is pressed to make the motor work, and the second bevel gear can be driven to rotate by the motor, and the second bevel gear and the first bevel gear are engaged through gears, so that the first bevel gear drives the thick tube to rotate, and the hand crank hook can be rotated through the thick tube, so that the crank is in a working state, the thick tube is connected to the shell through the thick tube rotating shaft, the thick tube is relatively stable when rotating, and the thick tube can be made to rotate in the opposite direction when the steering switch is turned, which can meet the needs of different working states, is relatively labor-saving, and has high work efficiency, and the motor moving part can be driven to move by rotating the adjustment knob, and the motor moving part is driven by the first motor The locking piece and the second motor locking piece are connected to the motor, so that the motor can be moved, thereby driving the second bevel gear to move and separate from the first bevel gear, avoiding the hand crank hook from working due to touching the power switch when not in use, and is safer to use. In addition, the locking sleeve is put on the outside of the thin tube and inserted into the middle tube, and the internal thread locking rotating piece is put on the outside of the locking sleeve, so that the bottom of the internal thread locking rotating piece is screwed on the outside of the middle tube. Since the inner surface of the internal thread locking rotating piece is inclined, the locking sleeve can be locked on the outside of the thin tube, thereby connecting the thin tube and the middle tube, and the height between the thin tube and the middle tube can be adjusted. Similarly, the height between the middle tube and the thick tube can be adjusted. It is suitable for different working scenarios, and the effect of use is better than that of the traditional method. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a schematic diagram of the overall structure of an electric hand crank of the present invention;

[0023] Figure 2 It is a structural schematic diagram of a crank body of an electric hand crank of the present invention;

[0024] Figure 3 It is a structural schematic diagram of an electric drive device of an electric hand crank of the present invention;

[0025] Figure 4 It is a schematic diagram of the partial structure of an electric drive device of an electric hand crank of the present invention;

[0026] Figure 5 It is a cross-sectional schematic diagram of the middle tube and thin tube hexagonal fixing parts of a hand-electric integrated crank of the present invention;

[0027] Figure 6 It is a schematic structural diagram of the cross-section of a thin tube, a middle tube and a thin tube hexagonal fixing piece of a hand-electric integrated crank of the present invention.

[0028] Icons: 1. Crank body; 11. Hand crank hook; 12. Thin tube; 13. Middle tube; 14. First adjustment mechanism; 141. Locking sleeve; 142. Internal thread locking rotating part; 15. Thick tube; 16. Second adjustment mechanism; 17. Thin tube hexagonal fixing part; 18. Middle tube hexagonal fixing part; 2. Shell; 3. Thick tube rotating shaft; 4. Electric drive device; 41. Motor; 42. Transmission mechanism; 421. First bevel gear; 422. Second bevel gear; 43. Positioning mechanism; 431. First motor locking part; 432. Second motor locking part; 433. Motor moving part; 434. Adjustment knob; 44. Electric module; 441. Power control circuit board; 442. Power switch; 443. Steering switch; 444. Main circuit board; 445. Inching button; 446. Battery rack; 447. Battery; 448. Charging port. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The embodiment of the present invention provides an electric hand crank, such as Figure 1 As shown, it includes a crank body 1 and a shell 2 movably mounted symmetrically on the outer side of the middle part of the crank body 1, the crank body 1 includes a hand crank hook 11 and a thick tube 15, an electric drive device 4 is installed inside the shell 2, the electric drive device 4 includes a movably mounted motor 41, a transmission mechanism 42, and an electric module 44, the transmission mechanism 42 includes a first bevel gear 421 on the outer surface of the inner thick tube 15 of the shell 2, and a second bevel gear 422 at the end of the output shaft of the motor 41, the electric module 44 includes a battery 447, a power control circuit board 441 and a main circuit board 444 stuck on the inner side of the shell 2, the electric drive device 4 also includes a positioning mechanism 43, the positioning mechanism 43 includes a first motor locking piece 431 on the outer side of the motor 41, a second motor locking piece 432 running through the output shaft of the motor 41, and a motor moving piece 433 on the top of the first motor locking piece 431.

[0034] like Figure 1 As shown, the first motor locking piece 431 is sleeved on the outside of the motor 41, and the second motor locking piece 432 is connected to the first motor locking piece 431 through the output shaft of the motor 41, the first motor locking piece 431 and the motor moving piece 433 are fixed by screws, and the adjusting knob 434 is screwed on the tail of the motor moving piece 433 by threads, and the motor 41, the power control circuit board 441 and the main circuit board 444 are respectively connected by wires.

[0035] Optional, such as Figure 2 , 56, the crank body 1 also includes a thin tube 12 and a middle tube 13. The lower end of the hand crank hook 11 is connected to the upper end of the thin tube 12, the lower outer side of the thin tube 12 is connected to the middle tube 13, and the middle tube 13 is located on the upper inner side of the thick tube 15. A first adjustment mechanism 14 is arranged between the thin tube 12 and the middle tube 13. The first adjustment mechanism 14 includes a locking sleeve 141 and an internal thread locking rotating member 142. The locking sleeve 141 is open and is on the outer side of the thin tube 12. The upper side of the locking sleeve 141 is circular and the lower side is twelve-pointed. The locking sleeve 141 is round and twelve-pointed. The shape of the bottom of the thin tube 12 is adapted to the inner surface of the middle tube 13, the cross section inside the internal thread locking rotating member 142 is trapezoidal, the inner surface of the internal thread locking rotating member 142 is connected to the outer surface of the locking sleeve 141, and the inner surface of the lower part of the internal thread locking rotating member 142 is connected to the outer surface of the upper part of the middle tube 13 through a thread, the inner side of the middle tube 13 at the bottom of the thin tube 12 is provided with a thin tube hexagonal fixing member 17, and the inner side of the thick tube 15 at the bottom of the middle tube 13 is provided with a middle tube hexagonal fixing member 18, and a second adjustment mechanism 16 is provided between the thick tube 15 and the middle tube 13.

[0036] The lower end of the hand crank hook 11 is fixedly connected to the upper end of the thin tube 12 via a rivet, and the thin tube 12 is movably connected to the middle tube 13 via a first adjustment mechanism 14 .

[0037] The middle tube 13 and the thick tube 15 are movably connected via a second adjusting mechanism 16 . The thin tube 12 , the middle tube 13 , and the thick tube 15 are all made of aluminum.

[0038] like Figure 2 , 5As shown in Figure 6, the locking sleeve 141 is sleeved on the outside of the thin tube 12 and inserted into the middle tube 13, and the internal thread locking rotating member 142 is sleeved on the outside of the locking sleeve 141, so that the bottom of the internal thread locking rotating member 142 is screwed on the outside of the middle tube 13. Since the inner surface of the internal thread locking rotating member 142 is inclined, the locking sleeve 141 can be locked on the outside of the thin tube 12, thereby connecting the thin tube 12 and the middle tube 13. The height between the thin tube 12 and the middle tube 13 can be adjusted, and the height between the middle tube 13 and the thick tube can be adjusted by the second adjustment mechanism 16. It is suitable for different working scenes. The upper side of the locking sleeve 141 is round and the lower side is twelve-angled. The lower side of the locking sleeve 141 is connected to the inner wall of the middle tube 13. The locking sleeve 141 is connected to each other so that the locking sleeve 141 will not rotate together with the internal thread locking rotating member 142, causing the thin tube 12 to get stuck during extension and retraction and unable to rotate when the internal thread locking rotating member 142 is rotated. The shape of the outer surface of the thin tube hexagonal fixing member 17 is adapted to the shape of the inner surface of the middle tube 13, and the shape of the outer surface of the middle tube hexagonal fixing member 18 is adapted to the shape of the inner surface of the thick tube 15. The bottom of the thin tube 12 can be locked by the thin tube hexagonal fixing member 17 to prevent the thin tube 12 from rotating independently inside the middle tube 13, and the bottom of the middle tube 13 can be locked by the middle tube hexagonal fixing member 18 to prevent the middle tube 13 from rotating independently inside the thick tube 15. The fixation is relatively firm and the transmission effect is better.

[0039] Optional, such as Figure 3 As shown, a charging interface 448 is installed on the side of the upper end of the shell 2 close to the thick tube 15, and the charging interface 448 is connected to the main circuit board 444 through a wire. The power control circuit board 441 is stuck in the plug position of the shell 2. The surface of the power control circuit board 441 is embedded in the inner wall of the shell 2 and is covered with a power switch 442. Half of the power switch 442 is located inside the shell 2, and the other half is located outside the shell 2.

[0040] The power control circuit board 441 is connected to the main circuit board 444 through a wire, a jog button 445 is arranged on the inner side of the outer shell 2, a button is arranged on the inner side of the jog button 445 on the surface of the main circuit board 444, the button and the main circuit board 444 are connected through a wire, the jog button 445 is sleeved on the surface of the button, the jog button 445 is fixed to the screw point raised cylinder of the outer shell 2 by screws, and the two groups of outer shells 2 are fixed by screws.

[0041] A steering power supply is arranged on the surface of the main circuit board 444 , a steering switch 443 is installed on the outside of the steering power supply, a battery rack 446 is arranged between the battery 447 and the housing 2 , and the positive and negative poles of the battery rack 446 are electrically connected to the main circuit board 444 .

[0042] like Figure 3As shown, the charging interface 448, the inching button 445, the battery 447, the steering switch 443 are connected to the main circuit board 444 through wires, and the battery 447 is installed inside the battery rack 446. The power switch 442 is pressed and held to turn on the machine. After turning on the machine, the inching button 445 is pressed to make the motor 41 work, and the second bevel gear 422 is driven to rotate by the motor 41, and the second bevel gear 422 and the first bevel gear 421 are engaged through gears, so that the first bevel gear 421 drives the thick tube 15 to rotate, and the hand crank hook 11 is rotated through the thick tube 15, so that the crank is in a working state, and the thick tube rotating shaft 3 is connected between the thick tube 15 and the outer shell 2. The thick tube 15 is relatively stable when rotating, and the thick tube 15 can be reversed when the steering switch 443 is turned, which can meet the needs of different working states, is relatively labor-saving, and has high work efficiency.

[0043] Optional, such as Figure 4 As shown, the first bevel gear 421 is fixedly connected to the outside of the thick tube 15, two thick tube rotating shafts 3 are arranged between the thick tube 15 and the outer shell 2, the thick tube 15 is movably connected to the outer shell 2 through the thick tube rotating shaft 3, the first bevel gear 421 is meshed with the second bevel gear 422, the second bevel gear 422 is fixedly connected to the output shaft of the motor 41, the first motor locking piece 431 is connected to the second motor locking piece 432 by screws, and the motor moving piece 433 is fixedly connected to the first motor locking piece 431 by screws, and the inside of the tail outer shell 2 of the motor moving piece 433 is clamped with an adjusting knob 434, and the adjusting knob 434 is connected to the motor moving piece 433 by threads.

[0044] like Figure 4 As shown, the adjusting knob 434 and the motor moving part 433 form a screw structure, and the motor moving part 433 can be driven to move by rotating the adjusting knob 434, and the motor moving part 433 is connected to the motor 41 through the first motor locking part 431 and the second motor locking part 432, so that the motor 41 can be moved, thereby driving the second bevel gear 422 to move and separate from the first bevel gear 421, avoiding touching the inching button 445 when not in use and causing the hand crank hook 11 to work, which is safer to use.

[0045] It should be noted that the present invention is an electric hand crank, and the user sleeves the internal thread locking rotating member 142 on the outside of the locking sleeve 141, so that the bottom of the internal thread locking rotating member 142 is screwed on the outside of the middle tube 13. Since the inner surface of the internal thread locking rotating member 142 is inclined, the locking sleeve 141 can be locked on the outside of the thin tube 12, thereby connecting the thin tube 12 and the middle tube 13, and the height between the thin tube 12 and the middle tube 13 can be adjusted. Similarly, the height between the middle tube 13 and the thick tube 15 can be adjusted. The power switch 442 is pressed and held to turn on the machine. After turning on the machine, the inching button 445 is pressed to make the motor 41 work, and the second bevel gear 422 is driven to rotate by the motor 41, and the second bevel gear 422 and the first bevel gear 421 are connected through The gears mesh, so that the first bevel gear 421 drives the thick tube 15 to rotate, and the hand crank hook 11 is rotated through the thick tube 15, so that the crank is in a working state. The thick tube 15 is connected to the outer shell 2 through the thick tube rotating shaft 3. The thick tube 15 is relatively stable when rotating. When the steering switch 443 is turned, the thick tube 15 can be rotated in the opposite direction to meet the needs of different working states. The motor moving part 433 can be driven to move by rotating the adjustment knob 434, and the motor moving part 433 is connected to the motor 41 through the first motor locking part 431 and the second motor locking part 432, so that the motor 41 can be moved, thereby driving the second bevel gear 422 to move and separate from the first bevel gear 421, so that the thick tube 15 can rotate freely.

[0046] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An electric hand crank, comprising a crank body (1), and a housing (2) movably mounted symmetrically on the outer side of the middle of the crank body (1), characterized in that: The crank body (1) comprises a hand crank hook (11) and a thick tube (15); an electric drive device (4) is installed inside the housing (2); the electric drive device (4) comprises a movably installed motor (41), a transmission mechanism (42), and an electric module (44); the transmission mechanism (42) comprises a first bevel gear (421) on the outer surface of the thick tube (15) inside the housing (2), and a second bevel gear (422) at the end of the output shaft of the motor (41); the electric module (44) comprises a battery (447), a power control circuit board (441) and a main circuit board (444) stuck on the inner side of the housing (2); the electric drive device (4) also comprises a positioning mechanism (43); the positioning mechanism (43) comprises a first motor locking member (431) on the outer side of the motor (41), a second motor locking member (432) penetrating the output shaft of the motor (41), and a motor moving member (433) at the top of the first motor locking member (431); The crank body (1) further comprises a thin tube (12) and a middle tube (13); the lower end of the hand crank hook (11) is connected to the upper end of the thin tube (12); the lower outer side of the thin tube (12) is connected to the middle tube (13); the middle tube (13) is located on the upper inner side of the thick tube (15); a first adjustment mechanism (14) is arranged between the thin tube (12) and the middle tube (13); the first adjustment mechanism (14) comprises a locking sleeve (141) and an internal thread locking rotating member (142); the locking sleeve (141) is open; the locking sleeve (141) is on the outer side of the thin tube (12); the upper side of the locking sleeve (141) is circular and the lower side is twelve-pointed. The bottom of the locking sleeve (141) is adapted to the shape of the inner surface of the middle tube (13); the internal cross-section of the internal thread locking rotating member (142) is trapezoidal; the inner surface of the internal thread locking rotating member (142) is connected to the outer surface of the locking sleeve (141); and the inner surface of the lower part of the internal thread locking rotating member (142) is connected to the outer surface of the upper part of the middle tube (13) through a thread; the inner side of the middle tube (13) at the bottom of the thin tube (12) is connected to a thin tube hexagonal fixing member (17); and the inner side of the thick tube (15) at the bottom of the middle tube (13) is provided with a middle tube hexagonal fixing member (18); and a second adjustment mechanism (16) is provided between the thick tube (15) and the middle tube (13); The first bevel gear (421) is fixed on the outside of the thick tube (15); two thick tube rotating shafts (3) are arranged between the thick tube (15) and the outer shell (2); the thick tube (15) is movably connected to the outer shell (2) via the thick tube rotating shafts (3); the first bevel gear (421) is meshed with the second bevel gear (422); the second bevel gear (422) is fixedly connected to the output shaft of the motor (41); the first motor locking member (431) is connected to the second motor locking member (432) via screws; and the motor moving member (433) is fixedly connected to the first motor locking member (431) via screws; an adjusting knob (434) is clamped inside the rear shell (2) of the motor moving member (433); and the adjusting knob (434) is connected to the motor moving member (433) via threads; The power control circuit board (441) is connected to the main circuit board (444) via a wire, a jog button (445) is arranged on the inner side of the housing (2), a button is arranged on the inner side of the jog button (445) on the surface of the main circuit board (444), the button and the main circuit board (444) are connected via a wire, the jog button (445) is sleeved on the surface of the button, and the jog button (445) is fixed to the screw point protrusion cylinder of the housing (2) via a screw; A steering power source is arranged on the surface of the main circuit board (444), and a steering switch (443) is installed on the outside of the steering power source. A battery rack (446) is arranged between the battery (447) and the housing (2), and the positive and negative electrodes of the battery rack (446) are electrically connected to the main circuit board (444).

2. An electric hand crank according to claim 1, characterized in that: A charging interface (448) is installed on one side of the upper end of the shell (2) close to the thick tube (15); the charging interface (448) is connected to the main circuit board (444) via a wire; the power control circuit board (441) is stuck on the insertion position of the shell (2); and the surface of the power control circuit board (441) is embedded in the inner wall of the shell (2) and is covered with a power switch (442).

3. The electric hand crank according to claim 1, characterized in that: The lower end of the hand crank hook (11) is fixedly connected to the upper end of the thin tube (12), and the thin tube (12) and the middle tube (13) are movably connected via a first adjustment mechanism (14).

4. The electric hand crank according to claim 1, characterized in that: The middle tube (13) and the thick tube (15) are movably connected via a second adjustment mechanism (16); the thin tube (12), the middle tube (13) and the thick tube (15) are all made of aluminum.

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