CN208639842U - The tiltable multifunction desk of desktop - Google Patents

Abstract

The utility model provides a kind of tiltable multifunction desk of desktop, belongs to schooling apparatus technical field.It solves the problems, such as that the desktop of existing desk adjusts inconvenient, safety difference and has a single function.The tiltable multifunction desk of this desktop, including feet, supporting beam one in feet, with the supporting beam two disposed in parallel of supporting beam one and the horizontal auxiliary table surface being fixed on above supporting beam one and supporting beam two, there is the resigning mouthful for extending to auxiliary table surface front edge on auxiliary table surface, its upper surface main desktop concordant with the upper surface of auxiliary table surface is combined in resigning mouthful, main desktop is hinged by being set to the articulated structure of the preceding edge of auxiliary table surface with auxiliary table surface, the lower section of main desktop is equipped with the adjusting component for driving main desktop to swing any angle and main desktop can be made to maintain current state.The utility model has many advantages, such as easy to adjust, highly-safe and vdiverse in function.

Description

The tiltable multifunction desk of desktop

Technical field

The utility model belongs to schooling apparatus technical field, is related to a kind of desk or draws table, especially a kind of desktop can incline Oblique multifunction desk.

Background technique

With the progress and expanding economy in epoch, many families are able to maintain correctly for child in the body development stage Sitting posture and scientific eye, are all equipped with special desk for it.But the inclination angle of desktop of existing desk is can not It adjusts, does not adapt to the learning Content of the various ways of children.Though being wanted when intrinsic desktop gradient is able to satisfy child's reading It asks, does not meet its requirement for writing, draw a picture etc. but.So the non-adjustable of inclination angle of desktop is unfavorable for the other subjects of children Study, student's exclusive table have to be left sometimes, to other places complete learning Content.The desks of a variety of different sizes is simultaneously simultaneously Very occupied space is deposited, and needs to spend more money, it is uneconomical.

For this purpose, Chinese patent disclose a kind of adjustable inclined angle of desktop picture table [application No. is 201110058937.0], including table frame and the desktop being hubbed in table frame, desktop is repeatable lift under relative to table frame Lid movement, drawing table further includes that multi gear position adjusts fixed device, and desktop can be in a horizontal state, and at an angle can also be positioned solid Fixed, when desktop in table frame relative to lifting or when lower cover, multi gear position adjusts that fixed device is adjustable and support positioning.The picture table is by picture Table is combined as a whole with easel, saves land occupation, economical and practical.

But entire desktop inclination when still having the problem that 1, using of the picture table of above-mentioned adjustable inclined angle of desktop, also It needs that penholder additionally is arranged；2, it includes frame, the bayonet on frame or card slot and bracket that multi gear position, which adjusts fixed device, When needing to be worked on the picture table for having a tilt angle, desktop is above lifted, while bracket being pulled out from groove, by bracket Fixation can be positioned by being caught in bayonet or card slot, be caught in bracket in different bayonet or card slot adjust desktop as needed Tilt angle, complicated for operation, easy clamp hand then inconvenient and dangerous for young student.

Summary of the invention

The purpose of this utility model is the presence of the above problem in view of the prior art, proposes a kind of easy to adjust, function The tiltable multifunction desk of desktop of multiplicity.

The purpose of this utility model can be realized by the following technical scheme:

The tiltable multifunction desk of this desktop, it is supporting beam one including feet, in feet, parallel with supporting beam one The supporting beam two of setting and the horizontal auxiliary table surface for being fixed on two top of supporting beam one and supporting beam, which is characterized in that the pair Have on desktop and extend to the resigning mouthful on auxiliary table surface front edge, the upper of its upper surface and auxiliary table surface is combined in the resigning mouthful The main desktop of flush, the main desktop are hinged by being set to the articulated structure of the preceding edge of auxiliary table surface with auxiliary table surface, The lower section of the main desktop is equipped with the adjusting for driving main desktop to swing any angle and main desktop can be made to maintain current state Component.

In the tiltable multifunction desk of above-mentioned desktop, the articulated structure includes being located at the preceding edge of auxiliary table surface Cylindric front-axle beam, one end of the front-axle beam are fixed in supporting beam one, and the other end is fixed in supporting beam two, and front-axle beam is vertical It is arranged in supporting beam one and supporting beam two, is fixed with main fixing seat below the main desktop, has in the main fixing seat The card slot one of semicircular in shape being equipped with front-axle beam, the main fixing seat front are connected with secondary fixing seat, and the pair is solid Reservation is equipped with the arc-shaped card slot two being equipped with front-axle beam, above-mentioned front-axle beam be limited in card slot one and card slot two it Between.

In order to carry out good fixation to auxiliary table surface, it is further fixed between supporting beam one and supporting beam two and preceding Liangping The capable back rest, auxiliary table surface are fixed on the back rest.

In the tiltable multifunction desk of above-mentioned desktop, the main fixing seat is three and along the length direction of front-axle beam It is uniformly arranged, the secondary fixing seat is also three and is arranged in a one-to-one correspondence with main fixing seat.Pass through card slot one and card slot dimorphism At the diameter in non-closed hole be equal to the outer diameter of front-axle beam, front-axle beam is threaded through in the non-closed hole, main fixing seat and secondary fixing seat structure At entirety can be rotated around the central axes of front-axle beam, main desktop is fixed on again in main fixing seat, therefore main desktop can be around front-axle beam Central axes rotation.

In the tiltable multifunction desk of above-mentioned desktop, the adjusting component includes being fixed on the main desktop back lower place Connecting plate and the hinged swing arm one in connecting plate left end and the swing arm two hinged with connecting plate right end, swing arm one and swing arm two are symmetrical Setting is fixed with the guide groove parallel with front-axle beam, is equipped in guide groove for driving pendulum between the supporting beam one and supporting beam two The lower end of arm one and swing arm two simultaneously with respect to or the driving structure one that moves toward one another.

In the tiltable multifunction desk of above-mentioned desktop, the driving structure one includes the screw rod one in guide groove With the screw rod two being coaxially connected with screw rod one, the screw rod one is symmetrical arranged with screw rod two and the thread rotary orientation and silk of screw rod one The thread rotary orientation of bar two is combined with and screw rod on the contrary, be combined with feed screw nut one on the screw rod one on the screw rod two The symmetrically arranged feed screw nut two of nut one, the lower end of above-mentioned swing arm one and feed screw nut one are hinged, the lower end of above-mentioned swing arm two It is connect with feed screw nut two, the driving unit for driving screw rod one and screw rod two while rotation is additionally provided on the guide groove.

In the tiltable multifunction desk of above-mentioned desktop, spacing collar, above-mentioned silk are fixed in the middle part of the guide groove Bar one and screw rod two are threaded through in the spacing collar, and one end of the guide groove is equipped with bearing block one, and the screw rod one is threaded through In the bearing block one, the other end of the guide groove is equipped with bearing block two, and the screw rod two is threaded through in the bearing block two, works as institute When the feed screw nut one stated abuts on bearing block one and feed screw nut two is abutted on bearing block two, the connecting plate is in The upper surface of extreme lower position and main desktop is concordant with the upper surface of auxiliary table surface.

In the tiltable multifunction desk of above-mentioned desktop, the driving unit includes coaxially being fixed on one left end of screw rod Worm gear and the worm screw with worm gear setting that is arranged in guide groove, be coaxially fixed on the worm screw and extend to auxiliary table surface The shaft of preceding edge, the front end of the shaft are equipped with the handle one for drive shaft rotation.When work, rotational handle one, Shaft can be driven to rotate, so that screw rod be driven to rotate, worm gear and worm screw cooperate, drive worm gear rotation, thus drive screw rod one with Two rotating Vortex of screw rod realizes that feed screw nut one is opposite with feed screw nut's two or moves toward one another.

In the tiltable multifunction desk of above-mentioned desktop, the feet is two: feet one and feet two, the table The lower end of foot one is equipped with bottom plate one, and the lower end of the feet two is equipped with bottom plate two, sets between the feet and above-mentioned guide groove There is the up and down adjustment structure for adjusting guide groove height.Since supporting beam one and supporting beam two are separately fixed at the both ends of guide groove, When guide groove oscilaltion, supporting beam one and two synchronization lifting of supporting beam, to drive main desktop and auxiliary table surface oscilaltion.For The stability of enhancing feet, between feet one and feet two is arranged baffle.

In the tiltable multifunction desk of above-mentioned desktop, the up and down adjustment structure includes being fixed in feet one The lead screw one and cooperation that screw rod pipe one, the screw rod pipe two being fixed in feet two, cooperation are set in screw rod pipe one are set to screw rod pipe Lead screw two in two, above-mentioned guide groove are set to the upper end of lead screw one and lead screw two, and the guide groove is equipped with for making lead screw one The driving structure two rotate in same direction with lead screw two.

In the tiltable multifunction desk of above-mentioned desktop, the driving structure two includes the tooth for being fixed on guide groove one end Wheel box one and the gearcase two for being fixed on the guide groove other end, the upper end of the lead screw one is coaxially fixed in gearcase one Bevel gear one, the upper end of the lead screw two are coaxially fixed with the bevel gear two in gearcase two, the gearcase one with Bull stick is equipped in gearcase two, the bull stick is equipped with the bevel gear three engaged with bevel gear one and engages with bevel gear two Bevel gear four, one end of the bull stick is additionally provided with the handle two for driving bar rotation.

Rotational handle two when work make bar rotation, and bar rotation band dynamic bevel gear three and bevel gear four rotate, thus band Dynamic bevel gear one and bevel gear two rotate in same direction, final that lead screw one is driven to rotate in same direction with lead screw two, in screw rod pipe one and screw rod The synchronization lifting of lead screw one and lead screw two is realized under the action of pipe two.

Compared with prior art, the tiltable multifunction desk of this desktop has the advantage that

Its is reasonable in design, and inclination and the liter up and down of entire desktop of main desktop can be realized by simple mechanical structure Drop, easy to operate, time saving and energy saving, regular primary and secondary schools' life can be operated, and highly-safe, applied widely, and can be in secondary table Holding tank is set on face, and setting is located at the drawer below auxiliary table surface and main desktop between supporting beam one and supporting beam two, makes it More articles can be accommodated, are integrally taken up space small.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of preferred embodiment provided by the utility model.

Fig. 2 is the first schematic diagram of the part-structure of desk provided by the utility model.

Fig. 3 is the second schematic diagram of the part-structure of desk provided by the utility model.

Fig. 4 is the third schematic diagram of the part-structure of desk provided by the utility model.

Fig. 5 is the structural schematic diagram that component is adjusted in desk provided by the utility model.

Fig. 6 is the schematic diagram of up and down adjustment structure in desk provided by the utility model.

In figure, 1, supporting beam one；2, supporting beam two；3, auxiliary table surface；4, main desktop；5, front-axle beam；6, main fixing seat；7, secondary solid Reservation；8, connecting plate；9, swing arm one；10, swing arm two；11, guide groove；12, screw rod one；13, screw rod two；14, feed screw nut one； 15, feed screw nut two；16, spacing collar；17, bearing block one；18, worm gear；19, worm screw；20, shaft；21, handle one；22, silk Rod tube one；23, screw rod pipe two；24, lead screw one；25, lead screw two；26, gearcase one；27, gearcase two；28, bevel gear one； 29, bevel gear two；30, bull stick；31, bevel gear three；32, bevel gear four；33, handle two.

Specific embodiment

It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further Description, but the utility model is not limited to these examples.

The tiltable multifunction desk of desktop as shown in Figure 1, supporting beam 1 and branch including feet, in feet The support supporting beam 22 disposed in parallel of beam 1 and the horizontal auxiliary table surface 3 for being fixed on 22 top of supporting beam 1 and supporting beam, such as Fig. 2 It is shown, there is the resigning mouthful for extending to 3 front edge of auxiliary table surface, as shown in Figure 1, being combined with table thereon in resigning mouthful on auxiliary table surface 3 The face main desktop 4 concordant with the upper surface of auxiliary table surface 3, main desktop 4 pass through the articulated structure and pair set on the preceding edge of auxiliary table surface 3 Desktop 3 is hinged, and the lower section of main desktop 4 is equipped with for driving main desktop 4 to swing any angle and main desktop 4 can be made to remain current The adjusting component of state.

As shown in Fig. 2 or Fig. 3 and Fig. 4, articulated structure includes the cylindric front-axle beam 5 positioned at the preceding edge of auxiliary table surface 3, front-axle beam 5 one end is fixed in supporting beam 1, and the other end is fixed in supporting beam 22, and front-axle beam 5 is perpendicular to supporting beam 1 and branch It supports beam 22 to be arranged, the lower section of main desktop 4 is fixed with main fixing seat 6, cooperating with front-axle beam 5 with semicircular in shape in main fixing seat 6 The card slot one of setting, main 6 front of fixing seat are connected with secondary fixing seat 7, and secondary fixing seat 7 cooperates equipped with arc-shaped with front-axle beam 5 The card slot two of setting, front-axle beam 5 are limited between card slot one and card slot two.As shown in figure 4, good in order to be carried out to auxiliary table surface 3 Good fixation, is further fixed on the back rest parallel with front-axle beam 5, auxiliary table surface 3 is fixed on this between supporting beam 1 and supporting beam 22 On the back rest.

As shown in Fig. 2, main fixing seat 6 is three and is uniformly arranged along the length direction of front-axle beam 5, secondary fixing seat 7 is also three It is a and be arranged in a one-to-one correspondence with main fixing seat 6.The diameter in the non-closed hole formed by card slot one and card slot two is equal to front-axle beam 5 Outer diameter, front-axle beam 5 are threaded through in the non-closed hole, and the entirety that main fixing seat 6 and secondary fixing seat 7 are constituted can be around the axis of front-axle beam 5 Line rotation, main desktop 4 is fixed on again in main fixing seat 6, therefore main desktop 4 can be rotated around the central axes of front-axle beam 5.

As shown in Fig. 3 or Fig. 4 or Fig. 5, adjusting component includes the connecting plate 8 and connecting plate for being fixed on 4 back lower place of main desktop The hinged swing arm 1 in 8 left ends and the swing arm two 10 hinged with 8 right end of connecting plate, swing arm 1 and swing arm 2 10 are symmetrical arranged, such as Shown in Fig. 2, it is fixed with the guide groove 11 parallel with front-axle beam 5 between supporting beam 1 and supporting beam 22, is equipped in guide groove 11 for driving The lower end of movable pendulum arm 1 and swing arm 2 10 simultaneously with respect to or the driving structure one that moves toward one another.

As shown in figure 5, driving structure one includes the screw rod 1 in guide groove 11 and is coaxially connected with screw rod 1 Screw rod 2 13, screw rod 1 is symmetrical arranged with screw rod 2 13 and the thread rotary orientation phase of the thread rotary orientation of screw rod 1 and screw rod 2 13 Instead, it is combined with feed screw nut 1 on screw rod 1, is combined on screw rod 2 13 and the symmetrically arranged screw rod of feed screw nut 1 Nut 2 15, the lower end of swing arm 1 and feed screw nut 1 are hinged, and the lower end of swing arm 2 10 is connect with feed screw nut 2 15, is led The driving unit for driving screw rod 1 and screw rod 2 13 while rotation is additionally provided on slot 11.

As shown in figure 5, the middle part of guide groove 11 is fixed with spacing collar 16, screw rod 1 and screw rod 2 13 are threaded through the limit In sleeve 16, one end of guide groove 11 is equipped with bearing block 1, and screw rod 1 is threaded through in the bearing block 1, in the present embodiment, It can also be equipped with bearing block two in the other end of guide groove 11, screw rod 2 13 is threaded through in the bearing block two, as feed screw nut 1 It abuts on bearing block 1 and when feed screw nut 2 15 is abutted on bearing block two, connecting plate 8 is in extreme lower position and top table The upper surface in face 4 is concordant with the upper surface of auxiliary table surface 3.

As shown in figure 5, driving unit includes coaxially being fixed on the worm gear 18 of one 12 left end of screw rod and being arranged in guide groove 11 The worm screw 19 being equipped with worm gear 18, be coaxially fixed with the shaft 20 for extending to the preceding edge of auxiliary table surface 3 on worm screw 19, turn The front end of axis 20 is equipped with the handle 1 rotated for drive shaft 20.When work, rotational handle 1 can drive shaft 20 to revolve Turn, so that screw rod be driven to rotate, worm gear 18 and worm screw 19 cooperate, and drive worm gear 18 to rotate, to drive screw rod 1 and screw rod 2 13 rotating Vortexes realize that feed screw nut 1 is opposite with feed screw nut's 2 15 or moves toward one another.

As shown in Figs 1-4, feet is two: the lower end of feet one and feet two, feet one is equipped with bottom plate one, feet two Lower end is equipped with bottom plate two, and the up and down adjustment structure for adjusting 11 height of guide groove is equipped between feet and above-mentioned guide groove 11.By The both ends of guide groove 11 are separately fixed in supporting beam 1 and supporting beam 22, when 11 oscilaltion of guide groove, supporting beam 1 and branch 22 synchronization lifting of beam is supportted, to drive 3 oscilaltion of main desktop 4 and auxiliary table surface.In order to enhance the stability of feet, in feet Baffle is set between one and feet two.

As shown in fig. 6, up and down adjustment structure includes the screw rod pipe 1 being fixed in feet one, is fixed in feet two Screw rod pipe 2 23, cooperation are set to the lead screw 2 25 of the lead screw 1 in screw rod pipe 1 and cooperation in screw rod pipe 2 23, lead Slot 11 is set to the upper end of lead screw 1 and lead screw 2 25, and guide groove 11 is equipped with for rotating in same direction lead screw 1 with lead screw 2 25 Driving structure two.

As shown in fig. 6, driving structure two includes being fixed on the gearcase 1 of 11 one end of guide groove and being fixed on guide groove 11 separately The gearcase 2 27 of one end, the upper end of lead screw 1 are coaxially fixed with the bevel gear 1 in gearcase 1, lead screw two 25 upper end is coaxially fixed with the bevel gear 2 29 in gearcase 2 27, is equipped in gearcase 1 and gearcase 2 27 Bull stick 30, bull stick 30 are equipped with the bevel gear 3 31 engaged with bevel gear 1 and the bevel gear four engaged with bevel gear 2 29 32, one end of bull stick 30 is additionally provided with the handle 2 33 for driving bull stick 30 to rotate.

Rotational handle 2 33 when work rotate bull stick 30, bull stick 30 rotation band dynamic bevel gear 3 31 and bevel gear 4 32 Rotation, thus rotate in same direction with dynamic bevel gear 1 and bevel gear 2 29, it is final that lead screw 1 and lead screw 2 25 is driven to turn in the same direction It is dynamic, the synchronization lifting of lead screw 1 and lead screw 2 25 is realized under the action of screw rod pipe 1 and screw rod pipe 2 23.

The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.

Claims (10)

1. a kind of tiltable multifunction desk of desktop, supporting beam one (1) and supporting beam one including feet, in feet (1) supporting beam two (2) disposed in parallel and the horizontal auxiliary table surface (3) being fixed on above supporting beam one (1) and supporting beam two (2), It is characterized in that, there is the resigning mouthful for extending to auxiliary table surface (3) front edge, in the resigning mouthful on the auxiliary table surface (3) It is combined with its upper surface main desktop (4) concordant with the upper surface of auxiliary table surface (3), the main desktop (4) is by being set to secondary table The articulated structure of face (3) preceding edge is hinged with auxiliary table surface (3), and the lower section of the main desktop (4) is equipped with for driving top table The adjusting component that face (4) swings any angle and main desktop (4) can be made to maintain current state.

2. the tiltable multifunction desk of desktop according to claim 1, which is characterized in that the articulated structure includes One end of cylindric front-axle beam (5) positioned at auxiliary table surface (3) preceding edge, the front-axle beam (5) is fixed in supporting beam one (1), The other end is fixed in supporting beam two (2), and front-axle beam (5) is arranged perpendicular to supporting beam one (1) and supporting beam two (2), the master It is fixed with below desktop (4) main fixing seat (6), cooperating with front-axle beam (5) with semicircular in shape in the main fixing seat (6) The card slot one of setting, described main fixing seat (6) front are connected with secondary fixing seat (7), and the secondary fixing seat (7), which is equipped with, is in The card slot two of arc being equipped with front-axle beam (5), above-mentioned front-axle beam (5) are limited between card slot one and card slot two.

3. the tiltable multifunction desk of desktop according to claim 2, which is characterized in that the main fixing seat (6) Be uniformly arranged for three and along the length direction of front-axle beam (5), the secondary fixing seat (7) also for three and with main fixing seat (6) It is arranged in a one-to-one correspondence.

4. the tiltable multifunction desk of desktop according to claim 2 or 3, which is characterized in that the adjusting component Connecting plate (8) and connecting plate (8) left end hinged swing arm one (9) and and connecting plate including being fixed on main desktop (4) back lower place (8) the hinged swing arm two (10) of right end, swing arm one (9) and swing arm two (10) are symmetrical arranged, the supporting beam one (1) and support It is fixed between beam two (2) guide groove parallel with front-axle beam (5) (11), is equipped in guide groove (11) for driving swing arm one (9) and pendulum The lower end of arm two (10) while driving structure one that is opposite or moving toward one another.

5. the tiltable multifunction desk of desktop according to claim 4, which is characterized in that the driving structure one is wrapped The screw rod two (13) for including the screw rod one (12) being located in guide groove (11) and being coaxially connected with screw rod one (12), the screw rod one (12) it is symmetrical arranged with screw rod two (13) and the thread rotary orientation of screw rod one (12) and the thread rotary orientation of screw rod two (13) is on the contrary, described Screw rod one (12) on be combined with feed screw nut one (14), it is right with feed screw nut one (14) to be combined on the screw rod two (13) Claim the feed screw nut two (15) of setting, the lower end of above-mentioned swing arm one (9) and feed screw nut one (14) hingedly, above-mentioned swing arm two (10) Lower end connect with feed screw nut two (15), the guide groove is additionally provided on (11) for driving screw rod one (12) and screw rod two (13) driving unit rotated simultaneously.

6. the tiltable multifunction desk of desktop according to claim 5, which is characterized in that the middle part of the guide groove (11) It is fixed with spacing collar (16), above-mentioned screw rod one (12) and screw rod two (13) are threaded through in the spacing collar (16), described to lead One end of slot (11) is equipped with bearing block one (17), and the screw rod one (12) is threaded through in the bearing block one (17), the guide groove (11) the other end is equipped with bearing block two, and the screw rod two (13) is threaded through in the bearing block two, as the feed screw nut When one (14) abut on bearing block one (17) and feed screw nut two (15) is abutted on bearing block two, the connecting plate (8) Upper surface in extreme lower position and main desktop (4) is concordant with the upper surface of auxiliary table surface (3).

7. the tiltable multifunction desk of desktop according to claim 6, which is characterized in that the driving unit includes The snail being equipped with worm gear (18) for being coaxially fixed on the worm gear (18) of screw rod one (12) left end and being arranged in guide groove (11) Bar (19) is coaxially fixed with the shaft (20) for extending to auxiliary table surface (3) preceding edge, the shaft on the worm screw (19) (20) front end is equipped with the handle one (21) for drive shaft (20) rotation.

8. the tiltable multifunction desk of desktop according to claim 4, which is characterized in that the feet is two: Feet one and feet two, the lower end of the feet one are equipped with bottom plate one, and the lower end of the feet two is equipped with bottom plate two, the table The up and down adjustment structure for adjusting guide groove (11) height is equipped between foot and above-mentioned guide groove (11).

9. the tiltable multifunction desk of desktop according to claim 8, which is characterized in that the up and down adjustment structure Screw rod pipe is set to including the screw rod pipe one (22) being fixed in feet one, the screw rod pipe two (23) being fixed in feet two, cooperation Lead screw one (24) and cooperation in one (22) are set to the lead screw two (25) in screw rod pipe two (23), and above-mentioned guide groove (11) is set to silk The upper end of thick stick one (24) and lead screw two (25), the guide groove (11) are equipped with for keeping lead screw one (24) and lead screw two (25) same To the driving structure two of rotation.

10. the tiltable multifunction desk of desktop according to claim 9, which is characterized in that the driving structure two It is described including being fixed on the gearcase one (26) of guide groove (11) one end and being fixed on the gearcase two (27) of guide groove (11) other end The upper end of lead screw one (24) is coaxially fixed with the bevel gear one (28) in gearcase one (26), the lead screw two (25) it is upper End is coaxially fixed with the bevel gear two (29) in gearcase two (27), the gearcase one (26) and gearcase two (27) Inside be equipped with bull stick (30), the bull stick (30) be equipped with the bevel gear three (31) that engage with bevel gear one (28) and with bore tooth The bevel gear four (32) of two (29) engagement is taken turns, one end of the bull stick (30) is additionally provided with the handle for driving bull stick (30) to rotate Two (33).