CN2871754Y - Safety manhole cover lock - Google Patents

Abstract

The utility model discloses a burglarproof well cover lock, wherein a gear wheel (12) is arranged between a lock cover (6) and a locking seat (7); the gear wheel (12) is matched with two racks (3); three isosceles triangular counterbores (9) are arranged within the locking seat (7); three coaxial locking through-holes (13) corresponding to the counterbore (9) of locking seat are positioned within the gear wheel (12); three springs (8) are separately positioned at the bottom of the three counterbores (9) in the locking seat (7); a dead lock (10) is positioned on the spring (8), and an active lock (11) is positioned on the dead lock (10); a coaxial positioning hole (14) is arranged at the center of the locking seat (7) and the gear wheel(12); a lock cover (6) and the locking seat (7) are fastened by a bolt; a key holea(1) is positioned at the center of the lock cover (6); the rack (3) and a plug pin(5) are connected by a connecting rod (4); the key comprises a positioning pin (15) and three key pins (16). The lock is characterized in excellent burglar protection performance, simple structure, ease-of-maintenance and strong adaptability to the environment.

Description

The anti-stealing manhole cover lock

Technical field

The utility model relates to well cover antitheft device, relates in particular to the anti-stealing manhole cover lock.

Background technology

The stolen potential safety hazard of bringing of well lid is perplexing people always for a long time, people utilize the material of some no recovery values to substitute traditional well lid material, or add various anti-theft devices on well lid, but some antitheft poor reliability, function is too simple, is easy to open.What have is prone to mechanical breakdown, causes well lid to open and whole the destroying of having to.Some is as electrical type, and complex structure, maintenance difficult and adaptive capacity to environment are poor.Though and some anti-theft feature is pretty good, waste time and energy can open but.

The utility model content

The purpose of this utility model is to overcome above-mentioned shortcoming and a kind of theftproof performance of providing is good, does not influence the well lid outward appearance, and relative unlatching simple in structure is easy, and is easy to maintenance, the anti-stealing manhole cover lock that adaptive capacity to environment is strong.

The purpose of this utility model and solve its technical problem underlying and realize by the following technical solutions: anti-stealing manhole cover lock of the present utility model, the anti-stealing manhole cover lock, comprise key, keyhole, lock body, connecting rod, latch, lock body is by locking closure, tooth bar, gear and lock are formed, it between locking closure and lock gear, gear and two tooth bars are complementary, be provided with three counterbores that are isosceles triangle in the lock, have in the gear and mutual three the corresponding coaxial lock through holes of the counterbore of lock, three springs lay respectively at three counterbores bottoms in the lock, end lock on spring, be arranged in counterbore and lock through hole, moving lock is arranged in the lock through hole ending on the lock, lock and gear centre are provided with coaxial locating hole, use bolt between locking closure and the lock, the locking closure center is a keyhole, is connected with connecting rod between tooth bar and latch;

Key is made up of alignment pin and three spoon pins, and three spoons are at answering the lock through hole to be three shapes of isosceles, and the thickness that its length equals gear deducts the length of moving lock.

The purpose of this utility model and solve its technical problem and can also adopt following technical measures further to realize.

For ease of lock is installed on the well lid, lock body is provided with installing hole;

In order to be easy to open, can between well lid and latch, establish cramp bar, cramp bar one end is fixed on the well lid, and the through hole that latch passes on the cramp bar is supported.

For preventing that rainwater and silt from entering keyhole, available at ordinary times plug is blocked it.

The utility model compared with prior art, as can be known from the above technical solutions, its critical piece lock body is hidden under the well lid, keyhole is only exposed on ground, may not open without key, unless its well lid is damaged, thereby theftproof performance is good; It is simple and reasonable, and the setting of the locating hole on the lock body and the alignment pin of key makes it open easily, and not high relatively to environment requirement, can be in the long period in the moist underground environment, and maintenance is convenient.

The specific embodiment of the present utility model is provided in detail by following examples and accompanying drawing thereof.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is a mounting structure schematic diagram of the present utility model;

Fig. 3 is the plane structure schematic diagram of lock through hole;

Fig. 4 is the structural representation of key.

Mark among the figure:

1, keyhole, 2, lock body, 3, tooth bar, 4, connecting rod, 5, latch, 6, locking closure, 7, lock, 8, spring, 9, counterbore, 10, end lock, 11, moving lock, 12, gear, 13, lock through hole, 14, locating hole, 15, alignment pin, 16, spoon pin, 17, installing hole, 18, cramp bar, 19, well lid, 20, manhole cover base, 21, pin-and-hole.

The specific embodiment

Below in conjunction with accompanying drawing and preferred embodiment, to the specific embodiment, structure, feature and effect thereof according to the anti-stealing manhole cover that the utility model proposes lock, describe in detail as after.

Referring to Fig. 1-4, the anti-stealing manhole cover lock, comprise key, keyhole 1, lock body 2, connecting rod 4, latch 5, lock body 2 is by locking closure 6, tooth bar 3, gear 12 and lock 7 are formed, 7 of locking closure 6 and locks are gear 12, gear 12 and two tooth bars 3 are complementary, be provided with three counterbores that are isosceles triangle in the lock 7, have in the gear 12 with corresponding mutually 13, three springs 8 of three coaxial lock through holes of the counterbore 9 of lock 7 to lay respectively at three interior counterbore 9 bottoms of lock 7, end lock 10 on spring 8, be arranged in counterbore 9 and lock through hole 13, moving lock 11 is arranged in lock through hole 13 ending on the lock 10, lock 7 and gear 12 centers are provided with coaxial locating hole 14, use bolt between locking closure 6 and the lock 7, locking closure 6 centers are keyhole 1, and 5 of tooth bar 3 and latches are connected with connecting rod 4;

Key is made up of alignment pin 15 and three spoon pins 16, and three spoon pin 16 corresponding lock through holes 13 are three shapes of isosceles, and the thickness that its length equals gear deducts the length of moving lock.

For ease of lock is installed on the well lid, lock body is provided with installing hole 17;

In order to be easy to open, can establish cramp bar 18 at well lid 19 and 5 of latches, cramp bar 18 1 ends are fixed on the well lid 19, and the through hole that latch 5 passes on the cramp bar 18 is supported.

For preventing that rainwater and silt from entering keyhole, available at ordinary times plug is blocked it.

During use, lock body 2 is installed on the well lid 19 by two installing holes 17, well lid 19 center correspondences leave keyhole 1, have two pin-and-holes 21 in manhole cover base 20 bottoms.Key is inserted the keyhole 1 that is arranged in well lid 19 centers, the alignment pin 15 of key inserts the locating hole 14 at lock 7 and gear 12 centers, three spoon pins 16 that are isosceles triangle of key insert in three lock through holes 13 of gear 12 correspondences simultaneously, spoon pin 16 promotes moving lock 11, because its length equals the length that the thickness of gear 12 deducts moving lock 11, make the top of ending lock 10 just concordant with the bottom surface of gear 12, the last plane of gear 12 is close on the plane at spoon pin 16 places of key at this moment, key, make relative rotary motion between gear 12 and the lock 7, it is reciprocating that gear 12 drives two tooth bars 3, two tooth bars 3 drive two connecting rods 4, two connecting rods 4 drive two latches 5 it are inserted respectively in two pin-and-holes 21, well lid 19 is lockable, and transfers to key, because the effect of spring 8, to end lock 10 and be positioned in gear 12 and the lock 7, thereby make gear 12 can not do relative motion with lock 7.It is opposite with the process of the operation of pinning well lid to open well lid, and pin withdraws from from pin-and-hole the most at last.

The above, it only is preferred embodiment of the present utility model, be not that the utility model is done any pro forma restriction, any technical solutions of the utility model content that do not break away from,, all still belong in the scope of technical solutions of the utility model any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present utility model.

Claims (4)

1, a kind of anti-stealing manhole cover lock, it is characterized in that: comprise key, keyhole (1), lock body (2), connecting rod (4), latch (5), lock body (2) is by locking closure (6), tooth bar (3), gear (12) and lock (7) are formed, be gear (12) between locking closure (6) and lock (7), gear (12) is complementary with two tooth bars (3), be provided with three counterbores that are isosceles triangle in the lock (7), have in the gear (12) and mutual three the corresponding coaxial lock through holes (13) of the counterbore (9) of lock (7), three springs (8) lay respectively at three counterbores (9) bottom in the lock (7), end lock (10) on spring (8), be arranged in counterbore (9) and lock through hole (13), moving lock (11) ends on the lock (10), be arranged in lock through hole (13), lock (7) and gear (12) center are provided with coaxial locating hole (14), use bolt between locking closure (6) and the lock (7), locking closure (6) center is keyhole (1), is connected with connecting rod (4) between tooth bar (3) and latch (5);

Key is made up of alignment pin (15) and three spoon pins (16), and the corresponding lock through holes of three spoon pins (16) (13) are three shapes of isosceles, and the thickness that its length equals gear deducts the length of moving lock.

2, anti-stealing manhole cover lock as claimed in claim 1, it is characterized in that: lock body (2) is provided with installing hole (17).

3, anti-stealing manhole cover lock as claimed in claim 1 or 2, it is characterized in that: establish cramp bar (18) between well lid (19) and latch (5), cramp bar (18) one ends are fixed on the well lid (19), and latch (5) passes the through hole on the cramp bar (18).

4, anti-stealing manhole cover lock as claimed in claim 3 is characterized in that: be provided with plug in the keyhole.

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