Transmission assembly of stirring part and cooking machine

Abstract

The transmission assembly of the stirring piece comprises the stirring piece, the stirring piece is provided with a rotating shaft, and the rotating shaft is provided with a first connecting part; the transmission mechanism comprises a driving part, a first transmission shaft, a transmission part and a second transmission shaft, the first transmission shaft is provided with a second connecting part, and the second connecting part is detachably connected with the first connecting part, so that the first transmission shaft is connected with the rotating shaft; the second transmission shaft is detachably connected with the driving part; a cooking machine comprises a machine base, a pot body and a transmission assembly, and a stirring piece is rotatably installed on the pot body through a rotating shaft; the transmission mechanism is arranged outside the pot body; a driving piece is arranged on the machine base and used for being detachably connected with the second transmission shaft after the pot body is installed on the machine base. The device can be detachably connected with a transmission mechanism through the rotating shaft, so that the device is convenient to detach; and during stirring, the transmission mechanism and the driving part are in detachable transmission, so that the stirring part is stable in rotating process.

Description

TECHNICAL FIELD

[0001] The utility model relates to stirring structure technical field especially, relates to a transmission assembly of stirring part and cooking machine. BACKGROUND

[0002] Stirring part is generally used for blender (juicer, complementary food machine etc.

[0003] The existing stirring part needs to be disassembled and washed after stirring, and the stirring blade is easy to be stained with residual material, so it needs to be cleaned regularly. The conventional method is to disassemble the stirring shaft and the equipment main body. In order to make the stirring process stable, the driving structure is usually connected with the stirring blade through the transmission structure, and the driving structure is directly connected with the driving structure and cannot be disassembled. UTILITY MODEL CONTENT

[0004] In order to overcome at least one of the defects of the prior art, the utility model provides a transmission assembly of stirring part and cooking machine, which can be connected with the transmission mechanism through the rotating shaft, and can be disassembled conveniently. When stirring, the transmission mechanism and the driving part are connected in a detachable manner, and the stirring part rotates stably.

[0005] The utility model adopts the technical scheme that

[0006] A transmission assembly of stirring part, comprising,

[0007] Stirring part, the stirring part is provided with a rotating shaft, and the rotating shaft is provided with a first connecting part;

[0008] Transmission mechanism, the transmission mechanism comprises a driving part, a first transmission shaft, a transmission part and a second transmission shaft, the first transmission shaft is provided with a second connecting part, the second connecting part is detachably connected with the first connecting part, so that the first transmission shaft is connected with the rotating shaft, the transmission part is used to guide the first transmission shaft to rotate synchronously when the second transmission shaft rotates;

[0009] Driving part, the driving part is detachably connected with the second transmission shaft and is used to drive the second transmission shaft to rotate.

[0010] Further, the transmission part comprises a first bevel gear and a second bevel gear, the first transmission shaft is connected with the first bevel gear, and the second transmission shaft is connected with the second bevel gear, and the first bevel gear is engaged with the second bevel gear.

[0011] Further, the first transmission shaft is provided with a first connecting groove, and an inner wall of the first connecting groove is provided with a first flat surface; the rotating shaft is provided with a first connecting head, and the first connecting head is provided with a second flat surface, the first connecting head is inserted into the first connecting groove, so that the second flat surface abuts against the first flat surface.

[0012] Further, the transmission mechanism further comprises a limiting piece, and the second transmission shaft is provided with a limiting part, the limiting part abuts against the limiting piece when the second transmission shaft rotates, so as to limit the rotation of the second transmission shaft.

[0013] Further, the limiting piece is a limiting switch, and the limiting part is a limiting sheet protruding from the second transmission shaft.

[0014] Further, the transmission mechanism further comprises a limiting sleeve, one end of the limiting sleeve is provided with a third connecting part, the second transmission shaft is provided with a fourth connecting part, the fourth connecting part is detachably connected with the third connecting part; the second transmission shaft is used for rotating under the action of external force.

[0015] Further, the limiting sleeve is provided with a second connecting groove, and an inner wall of the second connecting groove is provided with a third flat surface; the second transmission shaft is provided with a second connecting head, and the second connecting head is provided with a fourth flat surface, the second connecting head is inserted into the second connecting groove, so that the fourth flat surface abuts against the third flat surface.

[0016] Further, the driving piece is a motor, and a rotating shaft of the motor is detachably connected with the second transmission shaft.

[0017] A frying machine comprises a base, a pot body and the transmission assembly, the stirring piece is rotatably installed on the pot body through the rotating shaft; the transmission mechanism is arranged outside the pot body; the base is provided with a driving piece, and the driving piece is used for being detachably connected with the second transmission shaft after the pot body is installed on the base.

[0018] Further, the pot body is provided with a handle, the transmission assembly is installed in the handle, the second transmission shaft extends out through a bottom end of the handle and is detachably connected with the driving piece.

[0019] In summary, the utility model has the following technical effects:

[0020] The rotation shaft of the stirring piece is connected with the first transmission shaft of the transmission mechanism, the first transmission shaft is synchronously transmitted with the second transmission shaft through the transmission piece, the driving piece drives the second transmission shaft to rotate, and the power of the driving piece is transmitted to the stirring piece through the transmission piece, so that the rotating action of the stirring piece is stable. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic view of the utility model;

[0022] Figure 2 It is a structural schematic view of the transmission mechanism of the utility model;

[0023] Figure 3 It is a structural schematic view of the frying machine of the utility model;

[0024] Figure 4 It is a structural schematic view of the frying machine of the utility model;

[0025] Figure 5 It is a structural schematic view of the utility model's machine base;

[0026] Figure 6 It is a structural schematic view of the utility model's pot body.

[0027] Among them, the meaning of the reference signs is as follows: 10, stirring piece; 11, rotation shaft; 21, first transmission shaft; 22, second transmission shaft; 23, first bevel gear; 24, second bevel gear; 25, driving piece; 26, limiting sleeve; 261, limiting piece; 262, second connecting groove; 30, pot body; 31, handle; 40, machine base. DETAILED DESCRIPTION

[0028] In order to better understand and implement, the technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model.

[0029] In the description of the utility model, it should be explained that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0030] 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 belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0031] Referring to Figures 1-6 The utility model discloses a kind of transmission assemblies of stirring member 10, including stirring member 10, transmission mechanism and driving piece 25, stirring member 10 is equipped with rotating shaft 11, and first connecting portion is provided on rotating shaft 11.Transmission mechanism includes first transmission shaft 21, transmission piece and second transmission shaft 22, first transmission shaft 21 is equipped with second connecting portion, second connecting portion is detachably connected with first connecting portion, to make first transmission shaft 21 connect with rotating shaft 11;Second transmission shaft 22 can be detachably connected with driving piece 25, and second transmission shaft 22 rotates under the driving of driving piece 25.Transmission piece can guide first transmission shaft 21 synchronous rotation when second transmission shaft 22 rotates.

[0032] On the basis of above structure, when using the transmission assembly of stirring member 10 of the utility model, the transmission assembly can be used in cooking machine, blender etc., such as when being used in blender, the driving piece 25 of transmission assembly is installed on the body of blender, and transmission mechanism can be installed on stirring cup, when stirring action is carried out, the rotating shaft 11 of stirring member 10 can be connected with the second connecting portion of first transmission shaft 21 through first connecting portion, so that the rotating shaft 11 of stirring member 10 can be connected with first transmission shaft 21, then stirring cup is placed on the body of blender, so that second transmission shaft 22 is connected with driving piece 25 on the body of blender, so, when stirring action is carried out, driving piece 25 drives second transmission shaft 22 to rotate, second transmission shaft 22 can be transmitted to first transmission shaft 21 by the action of transmission piece, and then drives rotating shaft 11 to rotate, so that stirring member 10 rotates in stirring cup, and stirring action is realized.

[0033] And when the transmission assembly of stirring member 10 is used in cooking machine, the driving piece 25 of transmission assembly is installed on the base 40 of cooking machine, and transmission mechanism can be installed on pot body 30, when cooking action is carried out, the rotating shaft 11 of stirring member 10 can be connected with the second connecting portion of first transmission shaft 21 through first connecting portion, so that the rotating shaft 11 of stirring member 10 can be connected with first transmission shaft 21, then pot body 30 is placed on the base 40 of cooking machine, so that second transmission shaft 22 is connected with driving piece 25 on the base 40 of cooking machine, so, when cooking action is carried out, driving piece 25 drives second transmission shaft 22 to rotate, second transmission shaft 22 can be transmitted to first transmission shaft 21 by the action of transmission piece, and then drives rotating shaft 11 to rotate, so that stirring member 10 rotates in pot body 30, and cooking action is realized.

[0034] It should be noted that in the embodiment, the rotating shaft of the stirring piece 10 is connected with the first transmission shaft 21, the first transmission shaft 21 is synchronously transmitted with the second transmission shaft 22 through the transmission piece, the second transmission shaft 22 is rotated by the driving piece 25, and the power of the driving piece 25 is transmitted to the stirring piece 10 through the transmission piece, so that the rotating action of the stirring piece 10 is stable. The stirring piece 10 can be detached from the stirring body, which facilitates the disassembly and washing action of the stirring piece 10. In addition, the transmission mechanism is installed on the stirring body, and when the stirring body is detached from the equipment body for cleaning, the equipment body is lighter in weight, which facilitates movement.

[0035] Further, the transmission piece in the embodiment includes a first bevel gear 23 and a second bevel gear 24, the first transmission shaft 21 is connected with the first bevel gear 23, and the second transmission shaft 22 is connected with the second bevel gear 24; the first bevel gear 23 is engaged with the second bevel gear 24, so that the second transmission shaft 22 is rotated under the driving of the driving piece 25, the second transmission shaft 22 can drive the second bevel gear 24 to rotate, the second bevel gear 24 can be engaged with the first bevel gear 23, the first bevel gear 23 can be driven to rotate by the second bevel gear 24, and further drive the first transmission shaft 21 to rotate, so that the stirring piece 10 connected with the first transmission shaft 21 is rotated. In this way, the longitudinal output power is converted into horizontal transmission output in the bevel gear transmission mode, the occupied space of the transmission mechanism is saved, and the volume is reduced.

[0036] Of course, the transmission piece can also be realized in the form of a gear and a gear shaft, or in the form of gear transmission, which can be selected according to actual needs.

[0037] Further, the first connecting groove can be further arranged on the first transmission shaft 21, and the first connecting head is arranged on the rotating shaft 11, so that when the first transmission shaft 21 is connected with the rotating shaft 11, the first connecting head of the rotating shaft 11 can be inserted into the first connecting groove to realize detachable connection.

[0038] Specifically, the first flat surface is arranged on the inner wall of the first connecting groove, the second flat surface is arranged on the first connecting head, and the second flat surface is limited by the first flat surface after the first connecting head is inserted into the first connecting groove. In this way, the limiting cooperation between the first flat surface and the second flat surface can prevent relative rotation between the rotating shaft 11 and the first transmission shaft 21.

[0039] Of course, the first connecting part and the second connecting part in the embodiment can be formed in the form of the first connecting head and the first connecting groove. Of course, the detachable connection of the first connecting part and the second connecting part can also be realized in the form of threaded matching structure.

[0040] Furthermore, the above-mentioned transmission mechanism also includes a limiter, and a limiter portion is provided on the second transmission shaft 22, so that during the rotation of the second transmission shaft 22, the limiter portion can abut against the limiter to limit the rotation of the second transmission shaft 22, that is, the rotation range of the second transmission shaft 22 is achieved by the abutment and cooperation between the limiter and the limiter, so that the rotation angle of the second transmission shaft 22 is controllable, and then the rotation angle of the first transmission shaft 21 connected to it through the transmission member is controllable.

[0041] For example, when the transmission assembly of the stirring member 10 is applied to a cooking machine, the stirring member 10 can be prevented from rotating 360 degrees in the pot body 30 by limiting the rotation range of the stirring member 10. That is, the stirring member 10 rotates in a small range inside the pot body 30, such as 180 degrees, and there is no need to consider the rotation space required for the stirring member 10 to rotate 360 ​​degrees, thereby reducing the overall volume of the pot body 30.

[0042] Of course, without setting a limiting portion and a limiting member, the rotation range of the stirring member 10 can be 360 ​​degrees. In this way, the overall depth of the pot body 30 needs to take into account the space required for the stirring member 10 to rotate 360 ​​degrees. The overall depth of the pot body 30 can be increased. Such a pot body 30 has a larger stir-frying capacity.

[0043] Furthermore, the limit member in this embodiment is a limit switch, and the limit portion is a limit plate 261 protruding from the second transmission shaft 22, so that during the rotation of the second transmission shaft 22, the limit plate 261 can touch the limit switch. After the limit switch is touched, the driving member 25 can receive the limit signal of the limit switch, driving the second transmission shaft 22 to reverse, and the limit plate 261 can be reversed to touch the limit switch on the other side, and so on, to achieve stir-frying at a certain angle.

[0044] Of course, the limit member can also be a limit block, and limit blocks are set on both sides of the second transmission shaft 22 in the rotation direction to limit the second transmission shaft 22 in different rotation directions. The limit switch can be a photoelectric switch, an infrared sensor or a contact switch.

[0045] Furthermore, in order to facilitate the setting of the limiting part, the transmission mechanism in the present application also includes a limiting sleeve 26, and the limiting sleeve 26 can be provided with a third connecting part at one end of the limiting sleeve 26, and the second transmission shaft 22 is provided with a fourth connecting part, and the fourth connecting part is detachably connected to the third connecting part, and the driving member 25 is detachably connected to the limiting sleeve 26.

[0046] Thus, when the stirring and frying action is performed, the second transmission shaft 22 can be connected with the third connecting portion of the limiting sleeve 26 through the fourth connecting portion, and then the limiting sleeve can be rotated by the driving member 25. The limiting sleeve 26 can be sleeved outside the second transmission shaft 22, and the limiting piece 261 can be arranged outside the limiting sleeve 26, so that the limiting is realized, and the limiting portion does not need to be processed on the second transmission shaft 22. Only when the second transmission shaft 22 is connected with the driving member 25, the second transmission shaft 22 is connected with the limiting sleeve 26, and the use is convenient.

[0047] Further, the limiting sleeve 26 is provided with a second connecting groove 262, and a third flat surface is arranged on the inner wall of the second connecting groove 262. The second transmission shaft 22 is provided with a second connecting head, and the second connecting head is provided with a fourth flat surface. The second connecting head is inserted into the second connecting groove 262, so that the fourth flat surface abuts against the third flat surface.

[0048] Thus, when the second transmission shaft 22 is connected with the limiting sleeve 26, the second connecting head of the second transmission shaft 22 can be inserted into the second connecting groove 262 of the limiting sleeve 26, and the detachable connection is realized. Specifically, the third flat surface is arranged on the inner wall of the second connecting groove 262, and the fourth flat surface is arranged on the second connecting head. After the second connecting head is inserted into the first connecting groove, the fourth flat surface abuts against the third flat surface. The limiting cooperation between the third flat surface and the fourth flat surface can prevent the relative rotation between the second transmission shaft 22 and the limiting sleeve 26.

[0049] Of course, the third connecting portion and the fourth connecting portion in the embodiment can be formed in the mode of the second connecting head and the second connecting groove 262. Of course, the detachable connection of the third connecting portion and the fourth connecting portion can also be realized by using the structure of thread matching.

[0050] Further, the driving member 25 can be an electric motor in the prior art, and the rotating shaft of the electric motor is detachably connected with the second transmission shaft 22.

[0051] Based on the structure of the limiting sleeve 26, the rotating shaft of the electric motor can be inserted into the limiting sleeve 26, and the second transmission shaft 22 is connected with the limiting sleeve 26. The second transmission shaft 22 and the rotating shaft of the electric motor can also be directly connected through a shaft coupling or a shaft sleeve.

[0052] Embodiment 2,

[0053] Referring to Figures 1-6 A cooking machine includes a base 40, a pot body 30, and a transmission assembly. A stirring member 10 is rotatably installed on the pot body 30 through a rotating shaft 11. A transmission mechanism is arranged outside the pot body 30. The base 40 is provided with a driving member 25. The driving member 25 is used to be detachably connected with a second transmission shaft 22 after the pot body 30 is installed on the base 40.

[0054] The driving member 25 of the transmission assembly is installed on the base 40 of the cooking machine, and the transmission mechanism can be installed on the pot body 30. When the cooking operation is performed, the rotating shaft 11 of the stirring member 10 can be connected to the second connecting portion of the first transmission shaft 21 through the first connecting portion, so that the rotating shaft 11 of the stirring member 10 can be connected to the first transmission shaft 21. Then, the pot body 30 is placed on the base 40 of the cooking machine, so that the second transmission shaft 22 is connected to the driving member 25 on the base 40 of the cooking machine. In this way, when the cooking operation is performed, the driving member 25 drives the second transmission shaft 22 to rotate, and the second transmission shaft 22 can be driven to the first transmission shaft 21 through the transmission member, thereby driving the rotating shaft 11 to rotate, so that the stirring member 10 rotates in the pot body 30, and the cooking operation is realized.

[0055] It should be noted that in the embodiment, the rotating shaft of the stirring member 10 is connected to the first transmission shaft 21 of the transmission mechanism, the first transmission shaft 21 is synchronously driven by the transmission member, the driving member 25 drives the second transmission shaft 22 to rotate, and the power of the driving member 25 is transmitted to the stirring member 10 through the transmission member, so that the rotating operation of the stirring member 10 is stable. The stirring member 10 and the stirring body can be removed, which facilitates the disassembly and washing operation of the stirring member 10. In addition, the transmission mechanism is installed on the stirring body, and when the stirring body is separated from the equipment body for cleaning, the equipment body is lighter, which is convenient for moving.

[0056] Further, a handle 31 can be provided on the pot body 30, and the transmission assembly is installed in the handle 31. Since the handle 31 is usually provided on the pot body 30 to operate the pot body 30, the transmission assembly is arranged in the handle 31, and there is no need to additionally arrange other structures on the pot body 30 for assembly, so that the overall appearance of the pot body 30 is more simple. The second transmission shaft 22 extends through the bottom end of the handle 31 and is detachably connected to the driving member 25.

[0057] Specifically, the driving member 25 can be installed on the base 40 of the cooking machine. Based on the structure of the limiting sleeve 26 in the above embodiment 1, the driving member 25 is connected to the limiting sleeve 26 inside the base 40, and the second connecting groove 262 at the top end of the limiting sleeve 26 can be located on the end face of the base 40. In this way, after the pot body 30 is placed on the base 40 of the cooking machine, the second transmission shaft 22 extending out of the handle 31 of the pot body 30 can be directly inserted into the second connecting groove 262 of the limiting sleeve 26, thereby realizing assembly.

[0058] Of course, based on the structure without the limiting sleeve 26, the driving shaft of the driving member 25 extends out of the end face of the base or is located in the plug-in groove or spline groove inside the base 40. In this way, after the pot body 30 is assembled to the base 40, the second transmission shaft 22 can be directly screwed or inserted to the driving shaft to realize detachable connection. The specific selection can be made according to actual needs.

[0059] The technical means disclosed in the utility model scheme are not limited to the technical means disclosed in the above-mentioned embodiments, and also include technical schemes composed of any combination of the above technical features. It should be pointed out that, for ordinary skilled persons in the technical field, under the premise of not departing from the principle of the utility model, a number of improvements and refinements can be made, and these improvements and refinements are also considered to be within the protection scope of the utility model.

Claims

1. A drive assembly for a mixing element, the drive assembly comprising: The utility model relates to a stirring device, including, The stirring device comprises a stirring piece, a transmission mechanism and a driving piece. The transmission mechanism comprises a driving piece, a first transmission shaft, a transmission piece and a second transmission shaft. The first transmission shaft is provided with a second connecting part which is detachably connected with the first connecting part to connect the first transmission shaft with the rotating shaft.

2. The drive assembly of claim 1, wherein, The transmission piece is used to guide the first transmission shaft to rotate synchronously when the second transmission shaft rotates.

3. The drive assembly of claim 1, wherein, The driving piece is detachably connected with the second transmission shaft and is used to drive the second transmission shaft to rotate.

4. The drive assembly of claim 1, wherein, The transmission piece comprises a first bevel gear and a second bevel gear.

5. The drive assembly of claim 4, wherein the drive assembly further comprises a drive shaft, the drive shaft being coupled to the drive motor and the drive shaft being coupled to the drive gear. The first transmission shaft is provided with a first connecting groove, and the inner wall of the first connecting groove is provided with a first flat surface.

6. The drive assembly of claim 4, wherein, The rotating shaft is provided with a first connecting head, and the first connecting head is provided with a second flat surface.

7. A drive assembly for a mixing element according to claim 6, wherein, The second transmission shaft is provided with a limiting part which is used to abut against the limiting piece when the second transmission shaft rotates to limit the rotation of the second transmission shaft.

8. A drive assembly for a mixing element according to any one of claims 1 to 7, wherein, The limiting piece is a limiting switch, and the limiting part is a limiting sheet protruding from the second transmission shaft.

9. A cooking machine, characterized by The transmission mechanism further comprises a limiting sleeve.

10. The cooker according to claim 9, characterized in that, The second transmission shaft is provided with a fourth connecting part which is detachably connected with the third connecting part. The limiting sleeve is provided with a second connecting groove, and the inner wall of the second connecting groove is provided with a third flat surface. The second transmission shaft is provided with a second connecting head which is provided with a fourth flat surface. The driving piece is a motor, and the rotating shaft of the motor is detachably connected with the second transmission shaft. The utility model relates to a stirring device, including, The stirring device comprises a stirring piece, a transmission mechanism and a driving piece. The transmission mechanism comprises a driving piece, a first transmission shaft, a transmission piece and a second transmission shaft. The first transmission shaft is provided with a second connecting part which is detachably connected with the first connecting part to connect the first transmission shaft with the rotating shaft. The transmission piece is used to guide the first transmission shaft to rotate synchronously when the second transmission shaft rotates. The driving piece is detachably connected with the second transmission shaft and is used to drive the second transmission shaft to rotate. The transmission piece comprises a first bevel gear and a second bevel gear. The first transmission shaft is provided with a first connecting groove, and the inner wall of the first connecting groove is provided with a first flat surface. The rotating shaft is provided with a first connecting head, and the first connecting head is provided with a second flat surface. The second transmission shaft is provided with a limiting part which is used to abut against the limiting piece when the second transmission shaft rotates to limit the rotation of the second transmission shaft. The limiting piece is a limiting switch, and the limiting part is a limiting sheet protruding from the second transmission shaft. The transmission mechanism further comprises a limiting sleeve. The second transmission shaft is provided with a fourth connecting part which is detachably connected with the third connecting part. The limiting sleeve is provided with a second connecting groove, and the inner wall of the second connecting groove is provided with a third flat surface. The second transmission shaft is provided with a second connecting head which is provided with a fourth flat surface. The driving piece is a motor, and the rotating shaft of the motor is detachably connected with the second transmission shaft. The utility model relates to a stirring device, including, The stirring device comprises a stirring piece, a transmission mechanism and a driving piece. The transmission mechanism comprises a driving piece, a first transmission shaft, a transmission piece and a second transmission shaft. The first transmission shaft is provided with a second connecting part which is detachably connected with the first connecting part to connect the first transmission shaft with the rotating shaft. The transmission piece is used to guide the first transmission shaft to rotate synchronously when the second transmission shaft rotates. The driving piece is detachably connected with the second transmission shaft and is used to drive the second transmission shaft to rotate. The transmission piece comprises a first bevel gear and a second bevel gear. The first transmission shaft is provided with a first connecting groove, and the inner wall of the first connecting groove is provided with a first flat surface. The rotating shaft is provided with a first connecting head, and the first connecting head is provided with a second flat surface. The second transmission shaft is provided with a limiting part which is used to abut against the limiting piece when the second transmission shaft rotates to limit the rotation of the second transmission shaft. The limiting piece is a limiting switch, and the limiting part is a limiting sheet protruding from the second transmission shaft. The transmission mechanism further comprises a limiting sleeve. The second transmission shaft is provided with a fourth connecting part which is detachably connected with the third connecting part. The limiting sleeve is provided with a second connecting groove, and the inner wall of the second connecting groove is provided with a third flat surface. The second transmission shaft is provided with a second connecting head which is provided with a fourth flat surface. The driving piece is a motor, and the rotating shaft of the motor is detachably connected with the second transmission shaft.

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