Detachable eggbeater

Abstract

The utility model belongs to the technical field of household appliances, and particularly relates to a detachable eggbeater which comprises an eggbeater body, the eggbeater body comprises a working part, a supporting part movably connected with the working part, a base connected with the supporting part and a detaching unlocking mechanism arranged between the working part and the supporting part, the working part comprises a stirring part and a driving device arranged in the working part, the working part rotates relative to the supporting part to switch a use state and a disassembly unlocking state, and when the working part is in the use state, the stirring part is opposite to the base to limit unlocking of the disassembly unlocking mechanism; and when the working part is in the disassembling and unlocking state, the working part is disassembled from the supporting part through the disassembling and unlocking mechanism. According to the egg beater, the working part can be detached from the supporting part through the detaching and unlocking mechanism, the overall size can be reduced during storage, people can store the egg beater conveniently, space is saved, and all components of the egg beater can be packaged independently and are not prone to damage during transportation.

Description

Technical Field

[0001] This utility model relates to the technical field of household appliances, and in particular to a detachable egg beater. Background Technology

[0002] Commonly used egg beaters in households are mainly divided into manual egg beaters and electric egg beaters. Most electric egg beaters are relatively large, and their working parts and bases are either fixedly connected or have a small range of rotation. The working parts and bases cannot be disassembled, so they take up a lot of space and are inconvenient to store.

[0003] This utility model was proposed in response to the shortcomings of the existing technology. Utility Model Content

[0004] The aforementioned issue addresses the problem that most existing electric egg beaters are large in size, taking up a lot of space and being inconvenient to store.

[0005] This utility model provides a detachable egg beater, including an egg beater body. The egg beater body includes a working part, a support part movably connected to the working part, a base connected to the support part, and a disassembly and unlocking mechanism disposed between the working part and the support part. The working part includes a stirring element and a driving device disposed within the working part. The working part rotates relative to the support part to switch between a use state and a disassembly and unlocking state. When the working part is in the use state, the stirring element is opposite to the base, preventing the disassembly and unlocking mechanism from unlocking. When the working part is in the disassembly and unlocking state, the working part is detached from the support part by means of the disassembly and unlocking mechanism.

[0006] The detachable egg beater described above includes a detachable unlocking mechanism comprising a detachable unlocking button and a detachable unlocking component opposite to the detachable unlocking button. When the working part is in use, the detachable unlocking button and the detachable unlocking component are misaligned. When the working part is in the detachable unlocking state, the detachable unlocking button and the detachable unlocking component are opposite to each other. Pressing the detachable unlocking button allows the working part to be detached from the support. The detachable unlocking mechanism also includes a reset component fixedly connected to one side of the detachable unlocking button, which is used to reset the detachable unlocking button.

[0007] The detachable egg beater described above includes an extension on the end face of the support portion and a first opening on the end face of the working portion. The disassembly and unlocking assembly includes a movable member disposed between the working portion and the extension portion, and an elastic member disposed between the movable member and the extension portion. The movable member is retractably connected to the extension portion. The movable member has a first sliding groove, and the extension portion has a second sliding groove communicating with the first sliding groove and a third sliding groove communicating with the second sliding groove and the interior of the working portion. A first locking pin is provided at the connection between the first and second sliding grooves, and the first locking pin is connected to a second locking pin, which is placed in the third sliding groove. When the working portion is in use, the movable member and the extension portion extend into the working portion through the first opening. When the release / unlock button is misaligned with the moving part, the second locking pin extends out of the third slide groove and abuts against the inner wall of the working part, thus preventing the working part from separating from the support part. When the working part is in the disassembly / unlock state, the release / unlock button rotates with the working part to face the moving part. The release / unlock button drives the moving part to move towards the extension and causes the first slide groove to move relative to the second slide groove. This causes the first locking pin to move along the connection between the first and second slide grooves. The first locking pin also drives the second locking pin to move along the third slide groove and retract into the extension, thereby releasing the restriction of the second locking pin on the working part and the support part. The elastic element is used to reset the moving part.

[0008] The detachable egg beater described above also includes a rotating mechanism between the working part and the support part. The rotating mechanism includes a first rotating shaft located at the end of the support part and a first groove located at the end of the working part. The first groove is connected to the first rotating shaft and causes the working part to rotate relative to the support part.

[0009] The detachable egg beater described above has a first inclined surface at the end of the working part, a second inclined surface at the end of the support part opposite to the first inclined surface, a first rotating shaft disposed on the second inclined surface, and a first groove disposed on the first inclined surface.

[0010] Preferably, the lower end of the support portion is provided with a first mounting portion, the base is provided with a second mounting portion movably connected to the first mounting portion, the second mounting portion is provided with a second rotating shaft, the first mounting portion is provided with a second opening facing the second mounting portion and a mounting hole communicating with the second opening, the mounting hole is engaged with the second rotating shaft and rotates relative to the second rotating shaft, so that the support portion rotates and folds relative to the base.

[0011] The detachable egg beater described above includes a handheld housing for the working part, a mixing element mounted on the handheld housing, and a drive device located inside the handheld housing. The working part can be detached and used by hand after being handled by the detachment and unlocking mechanism.

[0012] The detachable egg beater described above has a retractable whisk mechanism inside the handheld housing, which is used to detach the mixing element from the working part.

[0013] The detachable egg beater described above also includes a second groove on one side of the second mounting part on the base. The egg beater body also includes a mixing container connected to the base through the second groove. A turntable is installed in the second groove, and the turntable is used to drive the mixing container to rotate relative to the base.

[0014] The detachable egg beater described above has an external toothed ring installed on the outer edge of the end of the mixing container, and the support part includes a transmission device disposed inside the support part and protruding outside the support part, the transmission device being engaged with the external toothed ring.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] 1. The disassembly and unlocking mechanism is provided between the working part and the support part. The working part can be disassembled from the support part through the disassembly and unlocking mechanism, which can reduce the overall volume when storing, making it easier for people to store and saving space. During transportation, the various components of the egg beater can be packaged independently and are not easily damaged.

[0017] 2. The working part includes a stirring component and a driving device. The working part can be disassembled and used independently. The egg beater can be used in a variety of ways, thereby improving the user experience.

[0018] 3. When the working part is in use, the disassembly and unlocking mechanism is restricted from disassembling the working part from the support. The disassembly and unlocking mechanism can only disassemble the working part from the support when the working part is rotated to the disassembly and unlocking state. This avoids accidental operation by the user in daily use, effectively reduces safety risks, and makes it safer for people to use. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present utility model;

[0020] Figure 2 This is the front view of the present invention;

[0021] Figure 3 This is a diagram of the internal structure of the present invention;

[0022] Figure 4 for Figure 3 Enlarged view of part A in the image;

[0023] Figure 5 This is an exploded view of the present invention;

[0024] Figure 6 This is a schematic diagram of the working part of this utility model;

[0025] Figure 7 This is a folded view of the present invention;

[0026] Figure 8 for Figure 5 The B-B sectional view in the diagram. Detailed Implementation

[0027] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0028] like Figures 1 to 8 As shown, the present invention provides a detachable egg beater, comprising an egg beater body. The egg beater body includes a working part 1, a support part 2 movably connected to the working part 1, a base 3 connected to the support part 2, and a disassembly / unlocking mechanism 4 disposed between the working part 1 and the support part 2. The working part 1 includes a stirring element 11 and a driving device disposed within the working part 1. The working part 1 rotates relative to the support part 2 to switch between a use state and a disassembly / unlocking state. When the working part 1 is in the use state, the stirring element 11 is opposite to the base 3, preventing the disassembly / unlocking mechanism 4 from unlocking. When the working part 1 is in the disassembly / unlocking state, the working part 1 is detached from the support part 2 by means of the disassembly / unlocking mechanism 4. In this embodiment, as... Figure 1 As shown, the working part 1 is in use, and is perpendicular to the support part 2. The stirring element 11 is opposite to the base 3 and faces downwards. The whisk can be used as an electric whisk. At this time, driving the disassembly and unlocking mechanism 4 cannot directly detach the working part 1 from the support part 2; Figure 2As shown, when the working part 1 rotates relative to the support part 2 to a vertical position, the working part 1 transitions from a usable state to a detachable / unlocked state. At this time, the detachable / unlocking mechanism 4 allows the working part 1 to be detached from the support part 2. This facilitates storage and saves space during daily use. During logistics transportation, the detachable / unlocking mechanism 4 removes the working part 1 from the main body of the egg beater, reducing the volume occupied by the egg beater for easier transport and protecting it from damage. Since the working part 1 contains the stirring element 11 and the driving device, it can be used independently after disassembly. This makes the egg beater flexible and versatile in its use, improving the user experience.

[0029] Furthermore, the disassembly and unlocking mechanism 4 includes a disassembly and unlocking button 41 and a disassembly and unlocking component 42 opposite to the disassembly and unlocking button 41. When the working part 1 is in use, the disassembly and unlocking button 41 and the disassembly and unlocking component 42 are misaligned. When the working part 1 is in the disassembly and unlocking state, the disassembly and unlocking button 41 and the disassembly and unlocking component 42 are opposite to each other. Pressing the disassembly and unlocking button 41 can disassemble the working part 1 from the support part 2. The disassembly and unlocking mechanism 4 also includes a reset member 43 fixedly connected to one side of the disassembly and unlocking button 41. The reset member 43 is used to reset the disassembly and unlocking button 41.

[0030] Furthermore, the support portion 2 has an extension portion 20 on its end face, and the working portion 1 has a first opening 12 on its end face. The disassembly and unlocking assembly 42 includes a movable member 421 disposed between the working portion 1 and the extension portion 20, and an elastic member 422 disposed between the movable member 421 and the extension portion 20. The movable member 421 is retractably connected to the extension portion 20. The movable member 421 has a first sliding groove 4211. The extension portion 20 has a second sliding groove 201 that can communicate with the first sliding groove 4211, and a third sliding groove 202 that communicates with the second sliding groove 201 and the interior of the working portion 1. A first locking pin 423 is provided at the connection between the first sliding groove 4211 and the second sliding groove 201. The first locking pin 423 is connected to a second locking pin 424, and the second locking pin 424 is placed in the third sliding groove 202. When the working portion 1 is in use, the movable member 421 and the extension portion 20 extend into the working portion 1 through the first opening 12. When the unlock button 41 is misaligned with the moving part 421, the second locking pin 424 extends out of the third slide groove 202 and the extended part of the second locking pin 424 abuts against the inner wall of the working part 1 to restrict the separation of the working part 1 and the support part 2. When the working part 1 is in the disassembly and unlocking state, the unlock button 41 rotates with the working part 1 to be opposite the moving part 421. The unlock button 41 drives the moving part 421 to move toward the extension 20 and drives the first slide groove 4211 to move relative to the second slide groove 201. This causes the first locking pin 423 to move along the connection between the first slide groove 4211 and the second slide groove 201. The first locking pin 423 drives the second locking pin 424 to move along the third slide groove 202 and retract into the extension 20, thereby releasing the restriction of the second locking pin 424 on the working part 1 and the support part 2. The elastic member 422 is used to reset the moving part 421.

[0031] like Figure 1 — Figure 4 and Figure 8 As shown, where Figure 8 This is a cross-sectional view of the extension 20 and the second latch 424 cut at an angle. The disassembly / unlocking button 41 is located at the end of the working part 1 and faces the direction of human grip when the working part 1 is in use. The disassembly / unlocking assembly 42 is located on the support part 2 near one end of the working part 1. The moving part 421 and the extension 20 can be slidably connected. To ensure relative rotation between the working part 1 and the support part 2, the first opening 12 can be an annular opening to allow space for the moving part 421 and the extension 20. Figure 4 As shown, Figure 4The direction of the middle arrow S1 is the movement direction of the movable part 421 in the disassembly and unlocking state, and the direction of the arrow S2 is the movement direction of the first locking pin 423 in the disassembly and unlocking state. During assembly, there is an angle between the first slide groove 4211 and the second slide groove 201. When the egg beater body is in use, the movable part 421 and the extension 20 extend into the working part 1 through the first opening 12. At this time, the disassembly and unlocking button 41 is away from the limiting part 421, and pressing the disassembly and unlocking button 41 cannot push the movable part 421 to disassemble the working part 1 from the support part 2. Figure 3 As shown, when the working part 1 rotates relative to the support part 2 to the vertical direction, the egg beater body switches from the use state to the disassembly / unlocking state. The disassembly / unlocking button 41 is aligned with the moving part 421. Pressing the disassembly / unlocking button 41 pushes the moving part 421 to compress the elastic member 422, thereby driving the moving part 421 to move towards the extension part 20. The moving part 421 also drives the first slide groove 4211 to move relative to the second slide groove 201, causing the first locking pin 423 to move along the connection between the first slide groove 4211 and the second slide groove 201. At the same time, the first locking pin 423 drives the second locking pin 424 to move along the third slide groove 202. The moving part 421 moves and retracts into the extension 20, thereby releasing the second locking pin 424 from the working part 1 and the support part 2, allowing the working part 1 to be detached from the support part 2. When the moving part 421 is reset by the elastic member 422, the moving part 421 drives the first slide groove 4211 to move and reset relative to the second slide groove 201, and drives the first locking pin 423 to move and reset. The first locking pin 423 drives the second locking pin 424 to move in the third slide groove 202 and extend into the interior of the working part 1, so that the working part 1 can be fixed on the support part 2. By reducing the overall size of the egg beater, the egg beater is easy to store and saves space. Moreover, the disassembly and unlocking mechanism 4 has a simple structure and is easy to operate. In addition, the working part 1 can only be disassembled by the disassembly and unlocking mechanism 4 after it has rotated to a specific position relative to the support part 2. This effectively avoids the working part 1 from falling off due to accidental operation of the disassembly and unlocking button 41 during daily use, reducing the safety risk of the egg beater and making it safer for people to use.

[0032] Furthermore, to ensure the normal operation of the disassembly and unlocking assembly 42, a first limiting part and a second limiting part are provided in the extension 20 on both sides of the second slide groove 201, and the first limiting part and the second limiting part are arranged along the moving direction of the first locking pin 423. Optionally, the first limiting part and the second limiting part can be formed by the wall of the extension 20, and the moving distance of the first locking pin 423 is limited by the first limiting part and the second limiting part; or, two spaced-apart clamps are provided in the moving part 421. When the moving part 421 is assembled with the extension 20 by the two clamps, the two clamps are located on both sides of the extension 20. Both clamps are provided with the first slide groove 4211, and the first locking pin 423 passes through the communication between the two first slide grooves 4211 and the second slide groove 201201. The first limiting part and the second limiting part are formed on both sides of the first slide groove 4211 by the wall of the clamps, and the moving distance of the first locking pin 423 is limited by the first limiting part and the second limiting part.

[0033] Furthermore, a rotating mechanism 5 is provided between the working part 1 and the support part 2. The rotating mechanism 5 includes a first rotating shaft 51 located at the end of the support part 2 and a first groove 52 located at the end of the working part 1. The first groove 52 is connected to the first rotating shaft 51 to allow the working part 1 to rotate relative to the support part 2. The rotating mechanism 5 is used to rotate the working part 1 relative to the support part 2, and has a simple structure and is easy to operate.

[0034] Furthermore, the working part 1 has a first inclined surface 13 at one end, and the support part 2 has a second inclined surface 22 opposite to the first inclined surface 13 at one end. The first rotating shaft 51 is disposed on the second inclined surface 22, and the first groove 52 is disposed on the first inclined surface 13. Figure 5 and Figure 6 As shown, the contact surface between the working part 1 and the support part 2 is an inclined surface. The working part 1 is guided to rotate relative to the support part 2 from a vertical state to a vertical state. The first inclined surface 12 and the second inclined surface 22 cooperate to rotate so that the rotation range of the working part 1 is at least 0 degrees to 180 degrees, which facilitates the disassembly of the working part 1 after rotation and makes it easy for people to operate. Moreover, after the working part 1 is rotated to a vertical state, the stirring element 11 faces the outside of the egg beater, which makes it easy for people to disassemble the stirring element 11.

[0035] Preferably, the lower end of the support part 2 is provided with a first mounting part 23, and the base 3 is provided with a second mounting part 31 movably connected to the first mounting part 23. The second mounting part 31 is provided with a second rotating shaft 32. The first mounting part 23 is provided with a second opening 24 facing the second mounting part 31 and a mounting hole 25 communicating with the second opening 24. The mounting hole 25 is engaged with the second rotating shaft 32 and rotates relative to the second rotating shaft 32, so that the support part 2 rotates and folds relative to the base 3. Figure 7 As shown, the support part 2 and the base 3 are folded together by the first mounting part 23 rotating relative to the second mounting part 31, which makes the egg beater easy to store and saves space. Moreover, each part of the egg beater can be disassembled and packaged independently, and the overall volume of each part is small, which makes it easy to transport and not easily damaged.

[0036] Furthermore, the working part 1 includes a handheld housing 14, the stirring element 11 is mounted on the handheld housing 14, and the driving device is located inside the handheld housing 14. The working part 1 can be detached and used by hand after being removed by the disassembly and unlocking mechanism 4. The working part 1 can be installed on the egg beater body for use as an electric egg beater, or it can be detached and used independently as a handheld egg beater, providing flexible and diverse usage options, making it more convenient for users, and thus improving the user experience.

[0037] Furthermore, the handheld housing 14 is provided with a rod-removing mechanism 15, which is used to detach the stirring component 11 from the working part 1. The stirring component 11 is detachably connected to the working part 1, and the rod can be removed with one click by the rod-removing mechanism 15, which is easy to operate and also makes it convenient for people to clean the stirring component 11.

[0038] Furthermore, the base 3 is also provided with a second groove 33 located on one side of the second mounting part 31. The whisk body also includes a mixing container 6 connected to the base 3 via the second groove 33. A turntable 7 is installed in the second groove 33, and the turntable 7 is used to drive the mixing container 6 to rotate relative to the base 3. The mixing container 6 rotates relative to the base 3 via the turntable 7, thereby enhancing the friction of the mixing component 11 during the mixing process by increasing the rotation between the mixing component 11 and the mixing container 6, thus improving the mixing efficiency of the whisk. It should be noted that the diameter of the mixing container 6 is greater than or equal to the length of the mixing component 11 extending into the mixing container 6, so as to ensure that the working part 1 can rotate relative to the support part 2. After the working part 1 rotates to the vertical position, the mixing component 11 faces the outside of the whisk, making it easy for people to disassemble the mixing component 11.

[0039] Furthermore, an external gear ring 61 is installed on the outer edge of the end of the mixing container 6. The support part 2 includes a transmission device 8 disposed within the support part 2 and protruding from the outside of the support part 2. The transmission device 8 is engaged with the external gear ring 61. An external gear ring 61 is also installed at the port of the mixing container 6, which is engaged with the transmission device 8, making the rotation of the mixing container 6 smoother and further improving the mixing efficiency of the whisk.

[0040] The above examples are merely illustrative of the technical content of this utility model to facilitate reader understanding, but do not imply that the implementation of this utility model is limited to these embodiments. Any technical extensions or re-creations made based on this utility model are protected by this utility model. The scope of protection of this utility model is defined by the claims.

Claims

1. A detachable egg beater comprising an egg beater body, characterized by: The eggbeater body comprises a working part (1), a supporting part (2) movably connected with the working part (1), a base (3) connected with the supporting part (2), and a dismounting and unlocking mechanism (4) arranged between the working part (1) and the supporting part (2). The working part (1) comprises a stirring part (11) and a driving device arranged in the working part (1). The working part (1) rotates relative to the supporting part (2) to switch between a use state and a dismounting and unlocking state. When the working part (1) is in the use state, the stirring part (11) is opposite to the base (3) to limit the dismounting and unlocking mechanism (4) from being unlocked. When the working part (1) is in the dismounting and unlocking state, the working part (1) is dismounted from the supporting part (2) through the dismounting and unlocking mechanism (4).

2. A detachable egg beater according to claim 1, wherein: The dismounting and unlocking mechanism (4) comprises a dismounting and unlocking button (41) and a dismounting and unlocking assembly (42) opposite to the dismounting and unlocking button (41). When the working part (1) is in the use state, the dismounting and unlocking button (41) is dislocated from the dismounting and unlocking assembly (42). When the working part (1) is in the dismounting and unlocking state, the dismounting and unlocking button (41) is opposite to the dismounting and unlocking assembly (42). Pressing the dismounting and unlocking button (41) can dismount the working part (1) from the supporting part (2). The dismounting and unlocking mechanism (4) further comprises a reset part (43) fixedly connected to one side of the dismounting and unlocking button (41). The reset part (43) is used to reset the dismounting and unlocking button (41).

3. A detachable egg beater according to claim 2, wherein: An extension part (20) is arranged on the end surface of the supporting part (2). A first opening (12) is arranged on the end surface of the working part (1). The dismounting and unlocking assembly (42) comprises a moving part (421) arranged between the working part (1) and the extension part (20), and an elastic part (422) arranged between the moving part (421) and the extension part (20). The moving part (421) is telescopically connected with the extension part (20). The moving part (421) is provided with a first sliding groove (4211). The extension part (20) is provided with a second sliding groove (201) capable of communicating with the first sliding groove (4211), and a third sliding groove (202) communicating with the second sliding groove (201) and the inside of the working part (1). The first sliding groove (4211) and the second sliding groove (201) are provided with a first locking pin (423). The first locking pin (423) is connected with a second locking pin (424). The second locking pin (424) is arranged in the third sliding groove (202). When the working part (1) is in the use state, the moving part (421) and the extension part (20) extend into the working part (1) through the first opening (12). The dismounting and unlocking button (41) is dislocated from the moving part (421). At this time, the second locking pin (424) extends out of the third sliding groove (202). The extending part of the second locking pin (424) abuts against the inner wall of the working part (1) to limit the working part (1) from being separated from the supporting part (2). When the working part (1) is in the disassembly unlocking state, the disassembly unlocking button (41) is rotated to be opposite to the moving part (421), the moving part (421) is driven to move towards the extension part (20) through the disassembly unlocking button (41), the first sliding groove (4211) is moved relative to the second sliding groove (201), the first locking pin (423) is moved along the communication position of the first sliding groove (4211) and the second sliding groove (201), the second locking pin (424) is moved along the third sliding groove (202) through the first locking pin (423) and is retracted into the extension part (20), so that the restriction of the second locking pin (424) on the working part (1) and the supporting part (2) is released, and the elastic part (422) is used to reset the moving part (421).

4. A detachable egg beater according to claim 3, wherein: The rotating mechanism (5) is further arranged between the working part (1) and the supporting part (2), the rotating mechanism (5) comprises a first rotating shaft (51) arranged at the end of the supporting part (2) and a first recess (52) arranged at the end of the working part (1), the first recess (52) is connected with the first rotating shaft (51) in a matched mode and enables the working part (1) to rotate relative to the supporting part (2).

5. A detachable egg beater according to claim 4, wherein: The end of the working part (1) is provided with a first inclined surface (13), the end of the supporting part (2) is provided with a second inclined surface (22) opposite to the first inclined surface (13), the first rotating shaft (51) is arranged on the second inclined surface (22), and the first recess (52) is arranged on the first inclined surface (13).

6. A detachable egg beater according to any one of claims 1 to 5, wherein: The lower end of the supporting part (2) is provided with a first mounting part (23), the base (3) is provided with a second mounting part (31) movably connected with the first mounting part (23), the second mounting part (31) is provided with a second rotating shaft (32), the first mounting part (23) is provided with a second opening (24) towards the second mounting part (31) and a mounting hole (25) communicated with the second opening (24), the mounting hole (25) is connected with the second rotating shaft (32) in a matched mode and rotates relative to the second rotating shaft (32), so that the supporting part (2) rotates relative to the base (3) and is folded.

7. A detachable egg beater according to claim 6, wherein: The working part (1) comprises a handheld shell (14), the stirring part (11) is mounted on the handheld shell (14), the driving device is arranged in the handheld shell (14), and the working part (1) can be used by hand after being disassembled through the disassembly unlocking mechanism (4).

8. A detachable egg beater according to claim 7, wherein: The handheld shell (14) is provided with a rod withdrawing mechanism (15), and the rod withdrawing mechanism (15) is used to disassemble the stirring part (11) from the working part (1).

9. A detachable egg beater according to claim 8, wherein: The base (3) is further provided with a second recess (33) on one side of the second mounting portion (31), and the egg beater body further comprises a stirring container (6) connected with the base (3) through the second recess (33), wherein a rotating disc (7) is mounted in the second recess (33), and the rotating disc (7) is used to drive the stirring container (6) to rotate relative to the base (3).

10. A detachable egg beater according to claim 9, wherein: An outer gear ring (61) is mounted on the outer edge of the end of the stirring container (6), and the support portion (2) comprises a transmission device (8) arranged in the support portion (2) and protruding outward from the support portion (2), wherein the transmission device (8) is in meshing connection with the outer gear ring (61).

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