阅读说明：本技术 母线夹装置和开关柜 (Bus clamp device and switch cabinet ) 是由 黄衍煌 刘源坤 林庆钦 廖建伟 吴鎏婧 张原� 林春源 王建春 于 2020-05-13 设计创作，主要内容包括：本发明公开一种母线夹装置和开关柜,母线夹装置包括置于柜体内的母线夹,所述母线夹用于夹装母线,所述母线用于电连接所述柜体内电气元件,还包括驱动部,所述驱动部驱动所述母线夹在所述柜体中平移；所述母线至少部分为软连接,以在所述母线夹平移过程中保持与所述电气元件的电连接。该母线夹装置,当配电设备需要进行改造拼柜时,原有开关柜和增加开关柜在进行拼柜过程中,如果各自的母线夹位置不对应,则可以平移母线夹的位置,使原有和增加开关柜的母线夹位置对应,从而能够建立连接关系,无需拆卸每段柜顶的母线夹、母线并调整后再安装,可以节省大量时间,缩短停电时间,又可减少拆除和重装过程中导致的故障及损失,安全又简便。(The invention discloses a bus clamp device and a switch cabinet, wherein the bus clamp device comprises a bus clamp arranged in a cabinet body, the bus clamp is used for clamping a bus, the bus is used for electrically connecting electric elements in the cabinet body, and the bus clamp further comprises a driving part, and the driving part drives the bus clamp to translate in the cabinet body; the bus bar is at least partially flexible to maintain electrical connection with the electrical component during translation of the bus bar clamp. This bus-bar clamp device, need reform transform when piecing together the cabinet when distribution equipment, original cubical switchboard is piecing together the cabinet in-process with increasing the cubical switchboard, if respective bus-bar clamp position does not correspond, then can translate the position that the bus-bar pressed from both sides, make original and increase the bus-bar clamp position correspondence of cubical switchboard, thereby can establish the relation of connection, the bus-bar that need not to dismantle every section cabinet top presss from both sides, the generating line is installed again after adjusting, can save plenty of time, shorten power off time, again reducible dismantlement and the trouble and the loss that lead to among the repacking process, it is safe simple and convenient again.)

1. The insulated bus clamp device comprises a bus clamp (10) arranged in a cabinet body (100), wherein the bus clamp (10) is used for clamping a bus, the bus is used for electrically connecting electrical elements in the cabinet body (100), and the insulated bus clamp device is characterized by further comprising a driving part (30), and the driving part (30) drives the bus clamp (10) to translate in the cabinet body (100); the bus bar is at least partially flexible to maintain electrical connection with the electrical component during translation of the bus bar clamp (10).

2. The bus bar clamp device according to claim 1, further comprising a rod member (20) capable of being fixed to a cabinet (100), wherein the rod member (20) extends through the bus bar clamp (10), and wherein the bus bar clamp (10) is driven by the driving portion (30) to translate along the rod member (20).

3. The bus bar clamp device according to claim 2, wherein the bus bar clamp (10) comprises a bus bar upper clamp (101) and a bus bar lower clamp (102) which are fastened to form a bus bar hole for clamping the bus bar; the bus bar clamp device comprises rod pieces (20) which are arranged in parallel and respectively penetrate through the bus bar upper clamp (101) and the bus bar lower clamp (102).

4. The bus bar clamp device according to claim 3, further comprising a lock catch (103), wherein the lock catch (103) locks the bus bar upper clamp (101) and the bus bar lower clamp (102).

5. The isolated bus bar clamp device according to claim 2, wherein the driving portion (30) comprises a driving tooth (304) and a rack (301), the rack (301) being connected to the bus bar clamp (10); the driving teeth (304) drive the rack (301) to move so as to drive the bus clamp (10) to translate;

the driving part (30) comprises a base (302), and the driving teeth (304) and the rack (301) are arranged on the base (302); the rod (20) penetrates through the base (302) and is fixed with the base (302).

6. An insulated bus-bar clamp arrangement according to any of claims 1-5, characterized in that the driving part (30) comprises a driving tooth (304) and a toothed rack (301), the toothed rack (301) being connected to the bus-bar clamp (10); the driving teeth (304) drive the rack (301) to move so as to drive the bus clamp (10) to translate.

7. The insulated bus bar clamp device according to claim 6, wherein the insulated bus bar clamp device comprises a plurality of the bus bars clamps (10) and a plurality of the driving portions (30) associated therewith; the insulating bus-bar clamp device further comprises a linkage connecting rod (40), the linkage connecting rod (40) can be connected with at least two driving teeth (304) of the driving parts (30), one driving tooth (304) of one driving part (30) rotates, and the linkage connecting rod (40) drives the corresponding other driving teeth (304) of the driving parts (30) to synchronously rotate.

8. The isolated bus bar clamp device according to claim 7, further comprising an operating portion (70), wherein the operating portion (70) can drive the driving teeth (304) to rotate under the action of external force; the operating part (70) comprises a plug shaft (701) and a handle (702) which are connected, and the plug shaft (701) is plugged into the driving tooth (304) to drive the driving tooth (304) to rotate.

9. The isolated bus bar clamp device according to claim 7, wherein at least one of the driving portions (30) further comprises a driven tooth (303) engaged with the rack (301), and comprises two driving teeth (304) arranged side by side and engaged with the driven tooth (303) at the same time, one of the driving teeth (304) can be used for power input, the other driving tooth (304) can be connected with the linkage link (40), one of the driving teeth (304) drives the driven tooth (303) to be engaged, and the driven tooth (303) drives the rack (301) to move and drives the other driving tooth (304) to rotate.

10. The busbar clamp device according to any of claims 1 to 5, wherein said busbar comprises a horizontally arranged copper busbar (501) clamped to said busbar clamp (10) and a copper tape flexible connection (502) vertically arranged and connected to said electrical component.

11. Switchgear comprising a cabinet body (100), wherein electrical components are arranged in the cabinet body (100), characterized in that an insulated bus-bar clamp device according to any of claims 1-10 is further arranged in the cabinet body (100).

Technical Field

The invention relates to the technical field of electrical equipment, in particular to a bus clamp device and a switch cabinet.

Background

When power distribution equipment is newly added due to various requirements of processes and the like in various industries, an electric control building cannot be newly added, and the original power distribution cabinet is firstly considered to be newly added and modified under the condition that the original transformer capacity or the capacity of a low-voltage incoming line cabinet meets the power of the newly added power distribution equipment.

However, when the newly-added low-voltage switch cabinet and the original low-voltage cabinet are transformed and combined, the main buses of the newly-added low-voltage switch cabinet and the original low-voltage cabinet can not be butted based on position deviation, the main bus power supply needs to be stopped at the moment, then the main buses are disassembled, holes are drilled in the splicing part after the main buses are disassembled, and then the main buses are installed on the top of the low-voltage cabinet again to complete the butting. Here [ disassemble-drilling-installation ] a cycle, a set of seven eight single-stage generating line low-voltage switchgear just need have a power failure seven to eight hours, if equipment is more complicated, even need two or three days of power off time, important equipment has a power failure and brings huge economic loss to in the main bus is torn open and is reformed the in-process, various new troubles may appear.

Disclosure of Invention

The invention provides an insulated bus clamp device, which comprises a bus clamp arranged in a cabinet body, wherein the bus clamp is used for clamping a bus, the bus is used for electrically connecting electric elements in the cabinet body, and the insulated bus clamp device also comprises a driving part, and the driving part drives the bus clamp to translate in the cabinet body; the bus bar is at least partially flexible to maintain electrical connection with the electrical component during translation of the bus bar clamp.

Optionally, the insulating bus bar clamp device further comprises a rod piece capable of being fixed to a cabinet body, the rod piece penetrates through the bus bar clamp, and the bus bar clamp is driven by the driving portion to move horizontally along the rod piece.

Optionally, the bus bar clamp comprises a bus bar upper clamp and a bus bar lower clamp which are buckled to form a bus bar hole for clamping the bus bar; the bus bar clamping device comprises rod pieces which are arranged in parallel and respectively penetrate through the bus bar upper clamp and the bus bar lower clamp.

Optionally, the bus bar connector further comprises a lock catch, and the lock catch locks the bus bar upper clamp and the bus bar lower clamp.

Optionally, the driving part comprises driving teeth and a rack, and the rack is connected with the bus bar clamp; the driving teeth drive the rack to move so as to drive the bus clamp to translate;

the driving part comprises a base, and the driving teeth and the rack are arranged on the base; the rod piece penetrates through the base and is fixed with the base.

Optionally, the driving part comprises driving teeth and a rack, and the rack is connected with the bus bar clamp; the driving teeth drive the rack to move so as to drive the bus clamp to translate.

Optionally, the insulated bus bar clamp arrangement comprises a plurality of said bus bars and a plurality of said associated drive portions; the insulating bus-bar clamp device further comprises a linkage connecting rod, the linkage connecting rod can be connected with at least two driving teeth of the driving portions, one of the driving teeth of the driving portions rotates, and the linkage connecting rod drives the corresponding other driving teeth of the driving portions to synchronously rotate.

Optionally, the device further comprises an operating part, and the operating part can drive the driving teeth to rotate under the action of external force; the operating part comprises an inserting shaft and a handle which are connected, and the inserting shaft is inserted into the driving teeth to drive the driving teeth to rotate.

Optionally, at least one the drive division still include with the driven tooth of rack toothing, and include two set up side by side and simultaneously with the drive tooth of driven tooth meshing, one the drive tooth can be used for power input, another the drive tooth can with the linkage connecting rod is connected, one the drive tooth drive driven tooth meshing, driven tooth drives the rack removes, and drives another the drive tooth rotates.

Optionally, the bus bar includes a copper busbar clamped in the bus bar clamp and arranged horizontally, and a copper strip flexible connection arranged vertically and connected to the electrical element.

The invention further provides a switch cabinet, which comprises a cabinet body, wherein the cabinet body is internally provided with electric elements, and the cabinet body is internally provided with the bus clamp device.

The cubical switchboard and the generating line that this scheme provided press from both sides the device, need reform transform when distribution equipment, for example, when increasing the cubical switchboard and piecing together the cabinet, original cubical switchboard is piecing together the cabinet in-process with increasing the cubical switchboard, if respective generating line presss from both sides the position and does not correspond, then can the translation generating line press from both sides the position and correspond, make original and the generating line that increases the cubical switchboard press from both sides the position and correspond, thereby can establish the relation of connection, the generating line that need not to dismantle every section cabinet top presss from both sides, the generating line is installed again after adjusting, can save plenty of time, shorten the power off time, again reducible demolish and repack the trouble and the loss that the in-.

Drawings

Fig. 1 is a schematic view of a bus bar clamp device provided in a switchgear provided in the present invention;

FIG. 2 is a schematic view of a bus bar clamp in the cabinet top bus bar compartment of FIG. 1;

FIG. 3 is a schematic view of the copper strip flexible connection in FIG. 1

FIG. 4 is a schematic view of a rack and pinion gear of the drive section of FIG. 1;

FIG. 5 is a left side view of FIG. 4;

FIG. 6 is a schematic view of the connection of the rack and pinion drive mechanism with the bus bar clamp;

FIG. 7 is a schematic view of the bus bar clip installed within the cabinet of FIG. 1;

fig. 8 is a schematic structural diagram of an operating portion of the bus bar clamp device according to the present invention.

The reference numerals in fig. 1-8 are illustrated as follows:

100 cabinets;

10 bus bar clamp; 101, clamping a bus; 102 bus lower clamp; 103, a quincuncial buckle; 10a limiting groove; 10b a through hole;

20 rods;

30 a drive section; 301 rack; 302 a base; 303 a driven tooth; 304 drive teeth; 304a connecting hole;

40 a linkage link;

501 copper busbar; 502, flexible connection of copper strips; 502b a docking portion; 502a soft connection;

60 butterfly bolts.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 and 2, fig. 1 is a schematic view of a bus bar device installed in a switchgear provided by the present invention, and only shows a top portion of the switchgear; fig. 2 is a schematic view of a bus bar clamp in the cabinet top bus compartment of fig. 1.

As shown in fig. 1, the switch cabinet, generally referred to as a low-voltage switch cabinet or a high-voltage switch cabinet, is generally an insulating device, and the bus bar clamp device includes a bus bar clamp 10, the bus bar clamp 10 may be disposed on a cabinet top of the switch cabinet, the cabinet top is provided with a bus bar chamber, and the bus bar clamp 10 is located in the bus bar chamber. The switchgear cabinet is provided with electrical components, such as relays, circuit breakers, switches, indicator lights, etc., in a portion below the top of the cabinet (not shown in the figure). The bus bar clip 10 is used to secure a bus bar that can be electrically connected to electrical components within the cabinet 100. As shown in fig. 2, the bus bar clamp 10 may include a bus bar upper clamp 101 and a bus bar lower clamp 102, both the bus bar upper clamp 101 and the bus bar lower clamp 102 are provided with a limiting groove 10a, and the notches of the limiting grooves 10a are opposite to each other, so that after the bus bar upper clamp 101 and the bus bar lower clamp 102 are fastened, the limiting grooves 10a are fastened to form a bus bar hole, thereby having a bus bar clamping function.

It should be noted that the bus bar clamp device in this embodiment further includes a driving portion 30, and the driving portion 30 can drive the bus bar clamp 10 to translate in the cabinet 100, at the same time, at least a portion of the bus bar is flexibly connected, so as to accommodate such translation without being interfered by translation, and while translating, the bus bar clamp device can still maintain an electrical connection relationship with the corresponding electrical component. The bus bar is at least partially flexible, i.e., has a certain deformability, for example, the bus bar may be partially flexible with copper tape 502. Still referring to fig. 1, the busbar specifically includes a copper strip flexible connection 502 arranged substantially vertically and a copper busbar 501 arranged horizontally, the copper busbar 501 is clamped in bus holes of the busbar clamps 10, when two busbar clamps 10 are provided, two ends of one copper busbar 501 are respectively clamped in corresponding bus holes of the two busbar clamps 10, and the copper busbar 501 is electrically connected with an electrical element located below through the copper strip flexible connection 502. Thus, as the bus bar clamp 10 moves horizontally across the top of the cabinet, the copper strip flexible connection 502 can continue to maintain the connection and make corresponding deformations or positional changes to accommodate the translation.

As shown in fig. 3, fig. 3 is a schematic diagram of copper tape flexible connection 502 in fig. 1.

The copper strip flexible connection 502 is formed by a multi-layer copper foil and comprises a flexible connection portion 502a and an abutting portion 502b positioned at two ends of the flexible connection portion 502a, and the abutting portion 501b is provided with a fixing hole so as to facilitate connection positioning. The butt joint part 502b at one end of the copper strip flexible connection 502 is used for establishing connection with the copper busbar 501, and the butt joint part 502b at the other end of the copper strip flexible connection is used for establishing connection with an electrical element.

So set up, need reform transform when distribution equipment, for example, when increasing the cubical switchboard and piecing together the cabinet, original cubical switchboard is piecing together the cabinet in-process with increasing the cubical switchboard, if respective generating line presss from both sides 10 positions and does not correspond, then can translate the position of generating line clamp 10, make original and increase the generating line clamp 10 positions of cubical switchboard correspond, thereby can establish the relation of connection, the generating line that need not to dismantle every section cabinet top presss from both sides 10, the generating line is installed again after adjusting, can save plenty of time, shorten the power off time, again reducible dismantlement and the trouble and the loss that lead to in-process of repacking, it is safe simple and convenient again.

With continued reference to fig. 4-6, fig. 4 is a schematic view of the rack-and-pinion 301 transmission mechanism of the driving portion 30 in fig. 1; FIG. 5 is a left side view of FIG. 4; fig. 6 is a schematic view of the rack and pinion 301 drive mechanism coupled to the bus bar clamp 10.

The driving part 30 in this embodiment includes a rack and pinion 301 transmission mechanism, specifically including a driving tooth 304, a driven tooth 303, and a rack 301 engaged with the driven tooth 303, as shown in fig. 4, the rack and pinion 301 transmission mechanism includes a base 302, the driving tooth 304 and the driven tooth 303 are disposed on a lower portion of the base 302, and the rack 301 is disposed on an upper portion of the base 302. Wherein the rack 301 is connected with the bus bar clamp 10, as shown in fig. 6, one end of the rack 301 is fixed with the bus bar clamp 10. When the driving gear 304 rotates based on power input, the driven gear 303 is driven to rotate, the driven gear 303 drives the rack 301 to move, the rack 301 is connected with the bus clamp 10, the bus clamp 10 is driven to translate, and the translation direction is the extension direction of the rack 301.

Referring again to fig. 1, in this embodiment, the rack 301 extends horizontally, and the bus bar clamp 10 translates in a horizontal direction. It can be understood that according to the cabinet splicing requirement, translation in other directions can be completed by adjusting the installation direction of the rack 301. The left and right sides of the view of fig. 1 are defined as the front and rear end directions of the switch cabinets, when a plurality of switch cabinets are spliced, two side surfaces are butted, namely the side surface of the switch cabinet in the direction vertical to the paper surface in fig. 1, when the common side surfaces are spliced, the position deviation of the buses in different cabinets 100 is mainly front and rear difference, the hole sites on the side surfaces of the cabinets 100 for bus butt joint are generally modular hole sites, and the hole site intervals are equal. Therefore, the rack 301 in this embodiment mainly drives the bus bar clamp 10 to move horizontally back and forth, i.e., to move left and right in fig. 1.

The driving part 30 realizes transmission through the gear rack 301 transmission mechanism, the structure is simple, the transmission structure is relatively stable and reliable, and the moving distance is easy to adjust. Generally, the bus of the switch cabinet is butted and the butting can be completed by shifting 10-20mm, so that the displacement of the insulated bus clamp 10 can be controlled at 50mm, when the transmission is realized through the gear rack 301 transmission mechanism, the diameters of the driven teeth 303 and the driving teeth 304 can be set to be about 16mm, the driving teeth 304 can be adjusted to be about 50mm by rotating for half a circle, and the displacement of the rack 301 in one circle is equal to the perimeter of the driven teeth 303. Of course, the driving unit 30 may be another driving mechanism, such as a screw nut.

As will be understood in conjunction with fig. 7, fig. 7 is a schematic view of the bus-bar clamp 10 installed within the cabinet 100 of fig. 1.

The bus-bar clamp device in this embodiment further includes a rod 20 capable of being fixed to the cabinet 100, the rod 20 penetrates through the bus-bar clamp 10, the bus-bar clamp 10 can be driven by the driving portion 30 to translate along the rod 20, and it can be seen that the extending directions of the rod 20 and the rack 301 are the same. Set up member 20, can play the effect that supports installation bus-bar clamp 10 on the one hand, on the other hand can regard as the guide rail of bus-bar clamp 10 translation, guarantees steady movement to protection rack 301. As shown in fig. 2, the bus bar clamp 10 has through holes 10b at both ends, and the rod members 20 can pass through the through holes 10b, so as to mount the bus bar clamp 10, specifically, the bus bar upper clamp 101 and the bus bar lower clamp 102 can both have through holes 10b, i.e., one bus bar clamp 10 is supported by two rod members 20, so as to increase the reliability of supporting and guiding, and also help to maintain the mutual position relationship of the bus bar upper clamp 101 and the bus bar lower clamp 102. Of course, the number of rods 20 is not limited.

The rod 20 may be a long screw, as shown in fig. 7, two ends of the long screw respectively penetrate through the sidewalls of the opposite sides of the cabinet 100, and are locked by bolts, which may be butterfly bolts 60, at the outside of the sidewalls, so that the locking is more reliable, and the long screw and the cabinet 100 are conveniently fixed. In order to increase the stability of the bus bar clamp 10 and prevent the bus bar clamp from loosening due to vibration caused by the operation of the electrical equipment, a lock catch is further provided to lock the bus bar upper clamp 101 and the bus bar lower clamp 102, and the lock catch may be, for example, a quincunx buckle 103 shown in fig. 2 and 6. Of course, the busbar upper clamp 101 and the busbar lower clamp 102 may be fixed by other fixing methods such as a snap groove and a buckle.

In addition, the driving part 30 may be mounted on the rod 20, and as shown in fig. 1 and 4, the rod 20 further penetrates through the base 302 of the driving part 30 and is fixed relative to the base 302, so that the rod 20 completes mounting and supporting of a plurality of components, and the structure is simple. It will be appreciated that the rack and pinion 301 drive mechanism of the driving portion 30 needs to be stationary relative to the cabinet 100 and fixed relative to the cabinet 100, so the base 302 may also be fixed directly to the cabinet 100, for example, to a side wall or a top wall of the cabinet 100, but it is obviously simpler to fix to the rod 20.

With continued reference to fig. 1 and 5, the bus bar clamp apparatus may include a plurality of bus bars 10 and a plurality of drivers 30 associated therewith. At this time, the bus bar clamping device may further include a linkage link 40, the linkage link 40 may be capable of connecting the driving teeth 304 of at least two driving portions 30, wherein the driving tooth 304 of one driving portion 30 rotates, and the linkage link 40 may drive the corresponding driving teeth 304 of the other driving portions 30 to rotate synchronously. That is, the connection between the link 40 and the driving tooth 304 is a rotation-preventing connection, and the rotation of the driving tooth 304 can be converted into the rotation of the link 40, and various methods are available, for example, a key connection is used, or as shown in fig. 4, a connecting hole 304a having a ratchet on a hole wall is provided in the middle of the driving tooth 304, and a corresponding tooth socket is provided at the end of the link 40, so that the rotation transmission can be realized even after the link 40 is inserted, or the link 40 and the driving tooth 304 can be directly fixed in a simpler manner, and of course, the other rotation transmission installation methods are simpler.

Set up linkage connecting rod 40, can transmit the rotation of the drive tooth 304 of a drive division 30 to the drive tooth 304 of other drive divisions 30 to realize the synchronous rotation of the drive tooth 304 of a plurality of drive divisions 30, so that a plurality of bus-bars clamp 10 synchronous motion, but also can guarantee the uniformity of displacement distance, moving direction, so can improve the efficiency of reforming transform and the butt joint precision of piecing together the cabinet.

Further, at least one driving portion 30 includes two driving teeth 304 disposed side by side and engaged with the driven tooth 303 at the same time, please refer to fig. 4, both driving teeth 304 are provided with connecting holes 304a, one end of the linkage connecting rod 40 is inserted into the connecting hole 304a to be connected with one driving tooth 304, it can be defined that the driving tooth 304 is a first driving tooth 304, the other driving tooth 304 is a second driving tooth 304, power can be input to the second driving tooth 304, the second driving tooth 304 rotates to drive the driven tooth 303 to rotate, the driven tooth 303 drives the first driving tooth 304 to rotate, the first driving tooth 304 drives the linkage connecting rod 40 to rotate, and the other end of the linkage connecting rod 40 is connected to the driving tooth 304 of the other driving portion 30, thereby driving the bus bar clamp 10 corresponding to the other driving portion 30 to translate.

Drive section 30 includes two drive teeth 304 to facilitate the coupling of the power input and linkage link 40, it being understood that both power input and linkage link 40 could be for one drive tooth 304. One end of the linkage connecting rod 40 is connected with the driving part 30 for power input, the other end of the linkage connecting rod can be connected with the driving teeth 304 of the other driving part 30, when more than two groups of bus clamps 10 are arranged, the linkage connecting rod 40 can penetrate through the driving teeth 304 of the rest driving parts 30, meanwhile, rotation-proof connection is realized, the racks 301 of the driving parts 30 are synchronously driven, and adjacent driving parts can also be connected through one linkage connecting rod 40. It will be appreciated that rather than the power input drive 30, the remaining drives 30 may be provided with one or both drive teeth 304, and that the linkage link 40 may be connected to a single drive tooth 304 or to one of the two drive teeth 304. As shown in FIG. 5, two drive teeth 304 are symmetrically disposed about the central cross-section of driven tooth 303, either drive tooth 304 can be used as a power input, and the other drive tooth 304 is connected to the linkage link 40.

In the above embodiment, the driving portion 30 drives the rack 301 to move by providing the driven tooth 303, and it can be understood that it is also possible that the driving tooth 304 directly drives the rack 301 to move. Here, the driven teeth 303 are provided to be simultaneously engaged with the driven teeth 303 when two driving teeth 304 are provided side by side, so that the rotation of the two driving teeth 304 is easily performed, and the driven teeth 303 are not provided to be simultaneously engaged with the two driving teeth 304 side by the rack 301.

Fig. 8 is a schematic diagram showing a specific structure of an operating portion of a bus bar clamp device according to the present invention, as shown in fig. 8.

In this embodiment, the driving portion 30 specifically realizes the power input to the driving teeth 304 through the operating portion, the operating portion includes an inserting shaft and a handle connected to each other, the handle is in a conventional L shape, the inserting shaft is disposed at one end of the handle, the inserting shaft and the handle may be separated or integrated, the inserting shaft is inserted into the connecting hole 304a of the driving teeth 304, and is connected to the linkage connecting rod 40 in an anti-rotation manner, and the transmission manner is the same.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.