CN107747325A

CN107747325A - A kind of well lid with anti-drop device

Info

Publication number: CN107747325A
Application number: CN201711023043.1A
Authority: CN
Inventors: 林雨发; 杨通
Original assignee: Rain Fat Construction Group Ltd
Current assignee: Rain Fat Construction Group Ltd
Priority date: 2017-10-26
Filing date: 2017-10-26
Publication date: 2018-03-02
Anticipated expiration: 2037-10-26
Also published as: CN107747325B

Abstract

The present invention relates to well lid field, aim to provide it is a kind of can in the vertical direction the spacing well lid with anti-drop device is carried out to well lid, its drip irrigation device is to include well lid and walling crib, ring baffle is provided with walling crib, ring baffle is provided with the first ring gear, walling crib inwall is connected with gear by rotary shaft, gear engages with the first ring gear, well lid is provided with is provided with the second ring gear close to walling crib side, second ring gear engages with gear, " L " shape undercut is additionally provided with walling crib, well lid is provided with gag lever post, drive device is provided with first ring gear, drive device is used to drive the first ring gear to rotate.By using above-mentioned technical proposal, well lid is placed in walling crib, gag lever post is set to be in " L " shape undercut perpendicular to the part on ground, when gag lever post moves to part of " L " the shape undercut parallel to ground, in the vertical direction is realized to spacing between well lid and walling crib, the possibility that reduction well lid departs from from walling crib.

Description

A kind of well lid with anti-drop device

Technical field

The present invention relates to well lid field, more particularly to a kind of well lid with anti-drop device.

Background technology

Well lid is for covering on road or the fender of family's middle-deep well, for preventing people or thing from falling down.Existing well Lid structure is excessively simple, and vehicle often makes well lid depart from walling crib by rolling, and causes well head to be exposed, potential safety hazard be present.

At present, notification number is that CN201459763U Chinese patent discloses a kind of Simple anti-drop well lid, and it includes setting Positioning buting iron on the downside of well lid, the positioning buting iron is 3~6 pieces, circumference fewer than well head internal diameter 10 determined by its outside~ 20mm, the high 50~100mm of buting iron.Described well lid is 20~25mm steel plate.

Although this well lid can reach the purpose of anticreep, it is merely able to carry out simple anticreep in the horizontal direction, In the vertical direction can not carry out anticreep, and when the edge of well lid is being rolled, well lid still is able to depart from from walling crib, safety Hidden danger still has.

The content of the invention

It is an object of the invention to provide a kind of well lid with anti-drop device, its can in the vertical direction well lid is carried out It is spacing, reduce the possibility that well lid departs from from walling crib.

The present invention above-mentioned technical purpose technical scheme is that：

A kind of well lid with anti-drop device, including well lid and walling crib, the well lid are arranged in walling crib, are provided with the walling crib Ring baffle, the ring baffle top are provided with the first ring gear that can be rotated freely, and the walling crib inwall is connected by rotary shaft Be connected to gear, and the rotary shaft by screw threads for fastening on walling crib inwall, the gear engages with the first ring gear, the well lid Upper to be provided with the second ring gear close to walling crib side, second ring gear is engaged with gear, and " L " shape undercut is additionally provided with the walling crib, And " L " the shape undercut extends partially into well ring edge position perpendicular to ground, the well lid is provided with gag lever post, first tooth Drive device is provided with ring, the drive device is used to drive the first ring gear to rotate.

By using above-mentioned technical proposal, well lid is placed in walling crib, gag lever post is in " L " shape undercut perpendicular to ground The part in face, the first ring gear is driven to rotate by drive device, the rotation driven gear of the first ring gear rotates, so as to drive second Ring gear rotates, and the rotation of the second ring gear drives well lid to rotate, and gag lever post rotates together with well lid, and gag lever post moves to " L " shape Undercut realizes in the vertical direction to spacing between well lid and walling crib, reduction well lid is from walling crib parallel to the part on ground The possibility of disengaging.

Further set：First ring gear is provided with supporting plate away from well lid side, offers through hole on the well lid, institute Stating drive device includes drive bevel gear, the first driven wheel of differential, the second driven wheel of differential, drive shaft and handwheel, the active Bevel gear is rotatably arranged in supporting plate by driving shaft, first driven wheel of differential and the second driven wheel of differential with actively Bevel gear engages, and first driven wheel of differential and the second driven wheel of differential are fixedly connected on the first ring gear by driven shaft Inner side, the driving shaft is provided with neck away from supporting plate one end, one end of the drive shaft is provided with fixture block, and with fixture block One end is through through hole inlay card in neck, and the drive shaft is away from driving shaft one end connection handwheel.

By using above-mentioned technical proposal, it is necessary to during rotating well cover, by drive shaft inlay card on driving shaft, pass through to rotate and drive Moving axis, which drives, actively to be driven, and the rotation of driving shaft drives the first driven wheel of differential engaged and the second driven wheel of differential to turn Dynamic, the rotation of the first driven wheel of differential and the second driven wheel of differential drives driven shaft motion, so as to drive the first ring gear to rotate, enters And by gear drive the second ring gear rotate, rotate well lid, make gag lever post move to the parallel ground of " L " shape undercut part or Person makes gag lever post be moved from the flat part earthward of " L " shape undercut, realizes well lid and installation or dismounting.

Further set：Neck on the driving shaft is shaped as flat recess, cross recess, rice word groove, in the drive shaft Fixture block be arranged to a block, hydraulic steering gear adopting cross piece, the rice block to match with flat recess, cross recess, rice word groove.

By using above-mentioned technical proposal, the connected mode variation between drive shaft and driving shaft, type of attachment is avoided It is single to cause well lid to be stolen together.

Further set：Connected between the driving shaft and drive shaft by flat recess and a block, on corresponding well lid Provided with 01 numbering；Connected between the driving shaft and drive shaft by cross recess and hydraulic steering gear adopting cross piece, corresponding well lid is provided with 02 and compiled Number；Connected between the driving shaft and drive shaft by rice word groove and rice block, corresponding well lid is provided with 03 numbering.

By using above-mentioned technical proposal, the different corresponding different connected modes of numbering, staff when mounted, root Select corresponding connected mode according to numbering, when needing to pull down well lid, staff can root know corresponding well lid in numbering Connected mode, it is known that the shape in well lid on driving shaft on neck, find out with corresponding fixture block drive shaft insertion neck Interior driving driving shaft, by the transmission between the first ring gear, the second ring gear and gear, well lid is disassembled, non-working person The connected mode below well lid can not be learnt, avoids well lid from being stolen.

Further set：The ring baffle is provided with arc groove, and the first ball is provided with the arc groove, described First ring gear lower surface contradicts with first ball.

By using above-mentioned technical proposal, drive bevel gear, which rotates, passes through the first driven wheel of differential and the second driven wheel of differential Driven shaft is driven to rotate, the rotation of driven shaft drives the first ring gear to rotate, and when rotating, the first ring gear is kept off the first ring gear with annular Sliding friction is produced between plate, and the setting of the first ball makes to be changed into rolling from sliding friction between the first ring gear and ring baffle Friction, reduces the frictional force between the first ring gear and ring baffle, facilitates the first ring gear to rotate.

Further set：Well lid edge lower surface is provided with the second ball, and second ball contacts at walling crib edge Support level on.

By using above-mentioned technical proposal, for well lid when being rotated relative to walling crib, the setting of the second ball makes well lid and well Rolling friction is changed into from original sliding friction between circle, makes the rotation between well lid and walling crib more convenient.

Further set：Filtration members are provided with the walling crib, the filtration members include the first screen pack and the second screen pack, It is connected between first screen pack and the second screen pack by sliding component, the side of first screen pack and the second screen pack Connecting rod is equipped with edge, the walling crib inwall is provided with annular groove, and the connecting rod is away from the first screen pack and the second filtering One end of net is in annular groove.

By using above-mentioned technical proposal, the first screen pack and the second screen pack are exerted a force, make the first screen pack and second Screen pack is close to each other, and the filtration members that the first screen pack and the second screen pack form are put into walling crib, then simultaneously to the first mistake Filter screen and the second screen pack exert a force in the opposite direction, the connecting rod on the first screen pack and the second screen pack is entered annular In groove, when installation well lid in time, the first screen pack and the second screen pack to being filtered from the leaf fallen down on well head, Leaf is avoided to fall to walling crib bottom.

Further set：The sliding component includes dovetails and dovetail groove, and the dovetails are arranged on the first screen pack On, the dovetail groove is opened on the second screen pack, and the dovetails are embedded in dovetail groove.

By using above-mentioned technical proposal, the first screen pack and the second screen pack are exerted a force, dovetails are sliding in dovetail groove It is dynamic, so as to change the relative position between the first screen pack and the second screen pack, enable staff smoothly by filtration members Walling crib is taken out or is put into out of walling crib.

Further set：The dovetails are provided with spring, and the spring is away from one end of dovetails connection dovetail groove Side wall, the spring in the raw when, the connecting rod on first screen pack and the second screen pack is in annular groove.

By using above-mentioned technical proposal, the first screen pack and the second screen pack are exerted a force, make the first screen pack and second Screen pack is close to each other, and now spring is in compressive state, and the first screen pack and the second screen pack are placed in walling crib, releasing pair The force of first screen pack and the second screen pack, spring return to nature by compressive state, and now connecting rod is in annular It is convenient that first screen pack and the second screen pack are arranged in walling crib in groove, avoid applying the first screen pack and the second screen pack Power in opposite direction can just be such that connecting rod is in annular groove.

Further set：" u "-shaped bar is equipped with first screen pack and the second screen pack, and the " u "-shaped bar is put down Row is set.

By using above-mentioned technical proposal, " u "-shaped bar be arranged to the first screen pack and the second screen pack provides force Point, convenient installation or dismounting to filtration members, improve installation or removal efficiency.

In summary, the invention has the advantages that：

1st, gag lever post set can in the vertical direction between walling crib and well lid relative position relation carry out it is spacing, avoid Depart from during the edge unbalance stress of well lid from walling crib, reduce the possibility that well lid brings potential safety hazard to people's trip, reduce The influence that the disengaging of well lid is brought to urban environment；

2nd, staff is able to know that a kind of corresponding connected mode of each numbering, makes the connection between well lid and walling crib various Change, facilitate staff to mount and dismount well lid, non-working person does not know the connected mode that every kind of numbering represents, makes well lid Stolen possibility reduces, and improves the security of well lid；

3rd, it is detachably connected between walling crib and filtration members, facilitates the installation or dismounting of filtration members；

4th, filtration members can filter to the rubbish fallen down from through hole；

5th, it is connected through a screw thread between rotary shaft and walling crib inwall, is needing staff to enter in well or needing filtration members During taking-up, rotary shaft and gear can be disassembled from walling crib inwall, and then the first ring gear is taken out, facilitate staff Taken out in into well or by filtration members.

Brief description of the drawings

Fig. 1 is the structural representation for being used to embody the present invention in the present embodiment；

Fig. 2 is the A portions schematic enlarged-scale view for being used to embody sliding component in Fig. 1；

Fig. 3 is the structural representation for being used to embody position relationship between " L " shape undercut and walling crib in the present embodiment；

Fig. 4 is the structural representation for being used to embody position relationship between gag lever post and well lid in the present embodiment；

Fig. 5 is the B portions schematic enlarged-scale view for being used to embody position relationship between ring baffle and filtration members in Fig. 1；

Fig. 6 is the structural representation for being used to embody drive device in the present embodiment；

Fig. 7 is the structural representation for being used to embody that fixture block is a block in the present embodiment；

Fig. 8 is the structural representation for being used to embody that neck is flat recess in the present embodiment；

Fig. 9 is the structural representation for being used to embody that fixture block is hydraulic steering gear adopting cross piece in the present embodiment；

Figure 10 is the structural representation for being used to embody that neck is cross recess in the present embodiment；

Figure 11 is the structural representation for being used to embody that fixture block is rice block in the present embodiment；

Figure 12 is the structural representation for being used to embody that neck is rice word groove in the present embodiment.

In figure, 1, well lid；2nd, walling crib；3rd, ring baffle；4th, the first ring gear；5th, rotary shaft；6th, gear；7th, the second ring gear； 8th, " L " shape undercut；9th, gag lever post；10th, drive device；101st, drive bevel gear；102nd, the first driven wheel of differential；103rd, second from Dynamic bevel gear；104th, drive shaft；105th, handwheel；11st, supporting plate；12nd, through hole；13rd, driving shaft；14th, driven shaft；15th, neck； 16th, fixture block；17th, filtration members；171st, the first screen pack；172nd, the second screen pack；18th, sliding component；181st, dovetails；182nd, swallow Stern notch；19th, connecting rod；20th, annular groove；21st, spring；22nd, " u "-shaped bar；23rd, the first ball；24th, the second ball；25th, supporting table Rank.

Embodiment

The present invention is described in further detail below in conjunction with accompanying drawing.

Embodiment：A kind of well lid with anti-drop device, as depicted in figs. 1 and 2, including well lid 1 and walling crib 2, well lid 1 are set Put in walling crib 2, and well lid 1 is provided with the ball 24 of through hole 12 and second, and the second ball 24 contradicts the supporting table at the edge of walling crib 2 On rank 25, annular groove 20 and filtration members 17 are provided with walling crib 2, filtration members 17 include the first screen pack 171 and the second screen pack 172, connected between the first screen pack 171 and the second screen pack 172 by sliding component 18, sliding component 18 includes dovetails 181 and dovetail groove 182, dovetails 181 be arranged on the first screen pack 171, dovetail groove 182 is arranged on the second screen pack 172, And dovetails 181 are embedded in dovetail groove 182, spring 21 is connected with the end of dovetails 181, spring 21 deviates from dovetails 181 one end is connected to the side wall of dovetail groove 182, is respectively provided with one " U " on the first screen pack 171 and the second screen pack 172 Shape bar 22, and two " u "-shaped bars 22 are parallel to each other, and connection is provided with the edge of the first screen pack 171 and the second screen pack 172 Bar 19, connecting rod 19 are in annular groove 20 away from one end of the first screen pack 171 and the second screen pack 172.

As shown in Figure 3 and Figure 4, " L " shape undercut 8 and ring baffle 3 are additionally provided with walling crib 2, " L " shape undercut 8 is perpendicular to ground Face is extended partially at 2 mouthfuls of walling crib, and well lid 1 is provided with close to the side wall of the projection of walling crib 2 to match with " L " shape undercut 8 Gag lever post 9, as shown in figure 5, ring baffle 3 is in the top of filtration members 17, ring baffle 3 is provided with arc away from the side of filtration members 17 Connected in star, is provided with the first ball 23 in arc groove, and ring baffle 3 is additionally provided with the first ring gear 4 away from the side of filtration members 17, and the One ring gear 4 is provided with supporting plate 11 away from the side of well lid 1, and supporting plate 11 contradicts the first ball 23, passes through screw thread on the inwall of walling crib 2 Rotary shaft 5 is connected with, rotary shaft 5 is provided with gear 6, is rotatablely connected between gear 6 and rotary shaft 5, the ring gear 4 of gear 6 and first Engagement, well lid 1 is provided with the second ring gear 7 close to the side of walling crib 2, and the second ring gear 7 engages with gear 6, is provided with the first ring gear 4 Drive device 10.

As shown in Figure 3 and Figure 6, it is driven to include drive bevel gear 101, the first driven wheel of differential 102, second for drive device 10 Bevel gear 103, drive shaft 104 and handwheel 105, drive bevel gear 101 are arranged in supporting plate 11 by driving shaft 13, first from The driven wheel of differential 103 of dynamic bevel gear 102 and second engages with drive bevel gear 101, and the first driven wheel of differential 102 and second Driven wheel of differential 103 is fixedly connected on the inner side of the first ring gear 4 by driven shaft 14, and driving shaft 13 deviates from the one end of supporting plate 11 Provided with neck 15, one end of drive shaft 104 is provided with the fixture block 16 to match with neck 15, and fixture block 16 is carried in drive shaft 104 One end through the inlay card of through hole 12 in neck 15.

On driving shaft 13 neck 15 be shaped to flat recess (as shown in Figure 8), cross recess (as shown in Figure 10) or Rice word groove (as shown in figure 12), as shown in Figure 7 and Figure 8, fixture block 16 is arranged to match with flat recess accordingly in drive shaft 104 A block, and connected between driving shaft 13 and drive shaft 104 by flat recess and a block, corresponding well lid 1 is provided with 01 Numbering；As shown in Figure 9 and Figure 10, fixture block 16 is arranged to the hydraulic steering gear adopting cross piece to match with cross recess accordingly in drive shaft 104, and main Connected between moving axis 13 and drive shaft 104 by cross recess and hydraulic steering gear adopting cross piece, corresponding well lid 1 is provided with 02 numbering；Such as Figure 11 and Shown in Figure 12, fixture block 16 is arranged to the rice block to match with rice word groove, and driving shaft 13 and driving accordingly in drive shaft 104 Connected between axle 104 by rice word groove with rice block, corresponding well lid 1 is provided with 03 numbering, as shown in fig. 6, drive shaft 104 is carried on the back One end from fixture block 16 connects handwheel 105, and handwheel 105 is in outside through hole 12.

Implementation process：When mounted, " u "-shaped bar 22 is held, " u "-shaped bar 22 is exerted a force, makes dovetails 181 in dovetail groove Slided in 182, spring 21 is in compressive state, and the first screen pack 171 and the second screen pack 172 are close to each other, now by first The area of the filtration members 17 of the screen pack 172 of screen pack 171 and second composition diminishes, and filtration members 17 are passed through into ring baffle 3, made Filter part 17 is in the position corresponding with annular groove 20, slowly reduces the power applied to " u "-shaped bar 22, spring 21 is by compressive state Slowly return to nature, the first screen pack 171 and the second screen pack 172 mutually away from motion, the areas of filtration members 17 by Gradual change is big, when connecting rod 19 is in annular groove 20, unclamps " u "-shaped bar 22, now filtration members 17 are arranged on the inwall of walling crib 2 On.

After filtration members 17 are arranged on the inwall of walling crib 2, well lid 1 is covered into the ring edge position in walling crib 2, in installation well lid 1 During, the gag lever post 9 on well lid 1 enters " L " shape undercut 8 perpendicular to the part on ground, according to neck 15 on driving shaft 13 Shape, one end with fixture block 16 passes through well lid 1 by selection with the drive shaft 104 of fixture block 16 to match with neck 15 On through hole 12, by the inlay card of fixture block 16 in neck 15, rotate handwheel 105, the rotation of handwheel 105 drives drive shaft 104 to rotate, Drive shaft 104 drives drive bevel gear 101 to rotate by driving shaft 13, and the rotation of drive bevel gear 101 drives what is engaged First driven wheel of differential 102 and the second driven wheel of differential 103 rotate, and driven shaft 14 is with first bevel gear 6 and second bevel gear 6 Rotation and rotate, the rotation of driven shaft 14 drives the first ring gear 4 to rotate, and the first ring gear 4 engages during rotation Gear 6 rotate, so as to drive the second ring gear 7 engaged to rotate, the rotation of the second ring gear 7 drives well for the rotation of gear 6 Lid 1 rotates, and the rotation of well lid 1 drives gag lever post 9 to rotate, and gag lever post 9 is out of " L " shape undercut 8 perpendicular to the partial turn on ground Parallel to the part on ground in " L " shape undercut 8, now " L " shape undercut 8 is spacing to the progress of the in the vertical direction of gag lever post 9, will Well lid 1 links together with walling crib 2, avoids well lid 1 from departing from discontinuity from walling crib 2, by well lid 1 in walling crib 2 After spacing, drive shaft 104 is lifted by handwheel 105, drive shaft 104 is separated with driving shaft 13, by drive shaft 104 from walling crib Take out in 2, the through hole 12 on well lid 1 is exposed, on the one hand avoid someone by rotating handwheel 105 by well lid 1 from walling crib 2 On disassemble, cause well lid 1 stolen, it is on the other hand convenient to make rainwater in the rainy day by the access wall of through hole 12, reaching draining Effect, after drive shaft 104 is taken out, according to the shape of the neck 15 between drive shaft 104 and driving shaft 13 and fixture block 16 Corresponding numbering is write down, conveniently later when needing to dismantle well lid 1, the active below of well lid 1 is known according to the numbering on well lid 1 The shape of neck 15 on axle 13, directly using the drive shaft 104 with respective shapes fixture block 16, well lid 1 is disassembled, saved Plenty of time.Improve operating efficiency.

If because of need of work, when filtration members 17 are taken out out of walling crib 2, staff looks for according to the numbering on well lid 1 Go out to carry the drive shaft 104 of fixture block 16 corresponding with numbering, by the handwheel 105 in drive shaft 104 by drive shaft 104 with card One end of block 16 makes neck 15 of the inlay card of fixture block 16 in drive shaft 104 on driving shaft 13 through the through hole 12 on well lid 1 It is interior, rotate handwheel 105, now the rotation direction of handwheel 105 with install well lid 1 when rotation direction on the contrary, drive shaft 104 passes through Driving shaft 13 drives drive bevel gear 101 to rotate, and the rotation of drive bevel gear 101 drives the first driven wheel of differential engaged 102 and second driven wheel of differential 103 rotate, so as to drive on the first driven wheel of differential 102 and the second driven wheel of differential 103 from Moving axis 14 rotates, and the rotation of driven shaft 14 drives the first ring gear 4 to rotate, and the rotation of the first ring gear 4 drives the gear 6 engaged Rotate, when rotating, the second ring gear 7 engaged rotates, the rotational band of the second ring gear 7 gear 6 with the rotation of gear 6 Dynamic well lid 1 rotates, during well lid 1 rotates, part of the gag lever post 9 from " L " shape undercut 8 parallel to ground on well lid 1 " L " shape undercut 8 is moved to perpendicular to the part on ground, gag lever post 9 is no longer spacing to well lid 1 and walling crib 2, by well lid 1 from walling crib 2 On take off, then the rotary shaft 5 with gear 6 is disassembled from the inwall of walling crib 2, the first ring gear 4 is taken out of walling crib 2 Go out, " u "-shaped bar 22 is exerted a force, make that the first screen pack 171 and the second screen pack 172 are close to each other, and connecting rod 19 detaches annular Groove 20, the filtration members 17 that the first screen pack 171 and the second screen pack 172 form are taken out out of walling crib 2.

The above embodiments are only explanation of the invention, and it is not limitation of the present invention, people in the art Member can make the modification of no creative contribution to the present embodiment as needed after this specification is read, but as long as at this All protected in the right of invention by Patent Law.

Claims

1. a kind of well lid with anti-drop device, including well lid (1) and walling crib (2), the well lid (1) are arranged in walling crib (2), It is characterized in that：Ring baffle (3) is provided with the walling crib (2), is provided with what can be rotated freely above the ring baffle (3) First ring gear (4), walling crib (2) inwall is connected with gear (6) by rotary shaft (5), and the rotary shaft (5) passes through screw thread It is fastened on walling crib (2) inwall, the gear (6) is engaged with the first ring gear (4), close to walling crib (2) side on the well lid (1) Provided with the second ring gear (7), second ring gear (7) is engaged with gear (6), and " L " shape undercut (8) is additionally provided with the walling crib (2), And " L " the shape undercut (8) extending partially at walling crib (2) mouth perpendicular to ground, the well lid (1) is provided with gag lever post (9) drive device (10), is provided with first ring gear (4), the drive device (10) is used to drive the first ring gear (4) to turn It is dynamic.

A kind of 2. well lid with anti-drop device according to claim 1, it is characterised in that：First ring gear (4) back of the body Supporting plate (11) is provided with from well lid (1) side, through hole (12) is offered on the well lid (1), the drive device (10) includes Drive bevel gear (101), the first driven wheel of differential (102), the second driven wheel of differential (103), drive shaft (104) and handwheel (105), the drive bevel gear (101) is rotatably arranged in supporting plate (11) by driving shaft (13), and described first from mantle Gear (102) and the second driven wheel of differential (103) engage with drive bevel gear (101), and first driven wheel of differential (102) and the second driven wheel of differential (103) is fixedly connected on the inner side of the first ring gear (4), the master by driven shaft (14) Moving axis (13) is provided with neck (15) away from supporting plate (11) one end, and one end of the drive shaft (104) is provided with fixture block (16), and band The one end for having fixture block (16) passes through through hole (12) inlay card, and the drive shaft (104) deviates from driving shaft (13) one in neck (15) End connection handwheel (105).

A kind of 3. well lid with anti-drop device according to claim 2, it is characterised in that：On the driving shaft (13) Neck (15) is shaped as flat recess, cross recess, rice word groove, the fixture block (16) on the drive shaft (104) be arranged to flat recess, A block, hydraulic steering gear adopting cross piece, the rice block that cross recess, rice word groove match.

A kind of 4. well lid with anti-drop device according to claim 3, it is characterised in that：The driving shaft (13) is with driving Connected between moving axis (104) by flat recess and a block, corresponding well lid (1) is provided with 01 numbering；The driving shaft (13) It is connected between drive shaft (104) by cross recess and hydraulic steering gear adopting cross piece, corresponding well lid (1) is provided with 02 numbering；The driving shaft (13) it is connected between drive shaft (104) by rice word groove and rice block, corresponding well lid (1) is provided with 03 numbering.

A kind of 5. well lid with anti-drop device according to claim 4, it is characterised in that：On the ring baffle (3) Provided with arc groove, the first ball (23), the first ring gear (4) lower surface and the described first rolling are provided with the arc groove Pearl (23) contradicts.

A kind of 6. well lid with anti-drop device according to claim 5, it is characterised in that：Under well lid (1) edge Surface is provided with the second ball (24), and second ball (24) contacts at the support level at walling crib (2) edge（25）On.

A kind of 7. well lid with anti-drop device according to claim 6, it is characterised in that：It is provided with the walling crib (2) Filtration members (17), the filtration members (17) include the first screen pack (171) and the second screen pack (172), first screen pack (171) it is connected between the second screen pack (172) by sliding component (18), first screen pack (171) and the second filtering Connecting rod (19) is equipped with the edge of net (172), walling crib (2) inwall is provided with annular groove (20), the connecting rod (19) it is in away from one end of the first screen pack (171) and the second screen pack (172) in annular groove (20).

A kind of 8. well lid with anti-drop device according to claim 7, it is characterised in that：Sliding component (18) bag Dovetails (181) and dovetail groove (182) are included, the dovetails (181) are arranged on the first screen pack (171), the dovetail groove (182) it is opened on the second screen pack (172), the dovetails (181) are embedded in dovetail groove (182).

A kind of 9. well lid with anti-drop device according to claim 8, it is characterised in that：On the dovetails (181) Provided with spring (21), the spring (21) is away from the side wall of one end of dovetails (181) connection dovetail groove (182), the spring (21) when in the raw, the connecting rod (19) on first screen pack (171) and the second screen pack (172) is in annular In groove (20).

A kind of 10. well lid with anti-drop device according to claim 9, it is characterised in that：First screen pack (171) " u "-shaped bar (22) and on the second screen pack (172) is equipped with, and the " u "-shaped bar (22) be arranged in parallel.