CN207934622U - A kind of power-assisted vehicle electric control mechanical lock - Google Patents

Abstract

The utility model is related to a kind of power-assisted vehicle electric control mechanical locks, including lock box, box cover, the electric device in lock box and the opening/closing lock executing agency for connecting electric device, electric device to be connected by worm couple with opening/closing lock executing agency；The electric device includes motor, worm couple, output gear；The opening/closing lock executing agency includes sliding block, and sliding block is equipped with the rack engaged with output gear；Sliding block is slidably installed on the guide bar, and guide rod is mounted on lock box, and sliding block, which is equipped with, described in the other side of opposite rack executes arm, executes and is slidably fitted with locking bar on arm；One end that dead bolt hole is corresponded in locking bar is equipped with lock tongue, and the other end installs limition orientation plate；It is set with locking compression spring on locking bar between arm and lock tongue inner face executing, resetting spring is set on locking bar between arm and limition orientation plate inner face executing；Postive stop baffle is equipped on the sliding slot described in limition orientation plate side.The utility model is simple in structure, and assembly or disassembly is convenient and efficient, and installation site is flexible, unlocks, is latched quickly, stability is high, and service life is long, the advantages that there is no stuck situation and having a wide range of application.

Description

A kind of power-assisted vehicle electric control mechanical lock

Technical field

The utility model belongs to vehicle using motor technical field, more particularly to a kind of power-assisted vehicle electric control mechanical lock.

Background technology

Currently, with the fast development of society, the continuous enhancing of mankind's environmental consciousness, Moped Scooter has become people Very important a kind of vehicles in routine work life；But due to being limited by volume and weight, Moped Scooter Either motorcycle is difficult to carry, therefore people need to be deposited under office building or cell temporary parking point, But the accident of lost and stolen often occurs；It antitheft is arranged so engineer is that Moped Scooter either motorcycle design is a variety of It applies, for example theftproof lock not easy to remove is installed；This kind of theftproof lock mainly has saddle lock, handle-bar lock etc.；It was used by long-term Cheng Faxian, since most of traditional theftproof lock is purely mechanic lock, so there are following defects：It must be by key when one, unlocking Spoon is inserted into lockhole, once key damage deformation in this way, then be difficult to open lock handle；Two, often once lockhole makes moist and can get rusty, into And influence the effect unlocked；If three, for setting list mechanical lock, anti-theft effect is bad, can if setting is more mechanical lock Cause unlocking process cumbersome, reduces the efficiency of unlocking.

In order to overcome drawbacks described above, the electric control lock of all multiple types is disclosed in the market, for example, the applicant has developed one early period Kind electric vehicles steering lock and handle lock, Chinese Patent Application No. 201610318843.5, above-mentioned steering lock and steering wheel Lock is motor-driven electromechanical locks, discloses following technical characteristic in that patent：Including the realization in lock housing, installation lock housing The executing agency of Lock of handlebar, the executing agency include driving motor, and driving gear is equipped on the motor shaft of driving motor, Driving gear engages driven gear, and the driven gear is mounted on the spindle nose of screw rod, and the screw rod is pivotally mounted on support plate On, sliding block is fitted in screw flight section, sliding block does horizontal reciprocating movement under the drive of screw rod, lock is connected on the sliding block Bar assembly；Controller controls the positive and negative rotation of driving motor to realize unlocking or locking function；

The prior art be also disclosed it is a kind of be arranged inside the motor of electric vehicle, solve electric machine main shaft locking, it can be achieved that motor The self-locking one motor vehicle guard against theft electronic mechanical lock of delay after stalling, the patent No.：CN200720107100.X, denomination of invention： A kind of one motor vehicle guard against theft electronic mechanical lock；Specific working mode is as follows：When under this kind of electromechanical lock open state, micro machine returns Road is off, and the transmission gear phase separation of latch front end face straight-tooth and electric machine main shaft, electric vehicle motor main shaft is in certainly By rotary state.When locking, signal is received by remote control inductive switch, micro machine circuit is connected and starts to rotate, electric machine main shaft It drives worm screw to rotate synchronously, and then worm gear is driven by worm screw, and so that rack is moved forward to rack is interlocked through ratchet driving, and Latch Forward is driven, micro machine stops after the straight-tooth of latch front end face engages with the transmission gear on electric vehicle motor main shaft Rotation, electric vehicle motor main shaft is stuck at this time, realizes locking.And when unlocking, signal is equally received by remote control inductive switch, Micro machine circuit is connected and starts to rotate backward, and electric machine main shaft drives the rotation of worm screw synchronous backward, and then drives worm gear by worm screw Reversion, and so that rack is moved backwards to rack is interlocked through ratchet driving, and moved after driving latch, make the straight-tooth of latch front end face It is separated with the transmission gear on electric vehicle motor main shaft, main shaft is made to be restored to the state of being freely rotated, realize and unlock.It is above-mentioned The condition realized of electronic lock be, could when the transmission gear face on the straight-tooth of latch front end face and electric vehicle motor main shaft Meet engagement between the two, otherwise will be unable to realize locking, can thus there is a kind of phenomenon, when locking, is felt by remote control Inductive switch receives signal, and micro machine circuit is connected and starts to rotate, and electric machine main shaft drives worm screw to rotate synchronously, and then by worm screw band Dynamic worm gear, and so that rack is moved forward, and latch is driven to move forward, the straight-tooth of latch front end face to rack is interlocked through ratchet driving It can not engage with the transmission gear on electric vehicle motor main shaft, micro machine is not up to an effective locking stroke, electricity at this time The problem of machine is still rotating, and the appearance of this phenomenon will cause burn-down of electrical machinery, motor are deposited once damaging electronic lock and will lose It is looking like, and certain trouble is brought for later stage maintenance.

For this purpose, the utility model provides and a kind of no matter in blocking or unlocking condition can ensure that motor is normally transported Turn and complete locking stroke or unlocking stroke, ensure motor service life, avoids the occurrence of the power-assisted vehicle electric that stuck situation occurs Control mechanical lock.

Invention content

The utility model provides a kind of simple in structure, assembly or disassembly to solve technical problem present in known technology Convenient and efficient, installation site is flexible, unlocks, is latched quickly, stability is high, and service life is long, and there is no stuck situation, Er Qieying With the wide power-assisted vehicle electric control mechanical lock of range.

The utility model is adopted the technical scheme that solve technical problem present in known technology：

A kind of power-assisted vehicle electric control mechanical lock, including lock box, box cover, the electric device in lock box and connection electricity The opening/closing lock executing agency of dynamic device, the lock box are equipped with dead bolt hole, be equipped in the lock box electric device placed cavity and Opening/closing lock executing agency placed cavity, the electric device are mounted in electric device placed cavity, are additionally provided on the lock box and electricity The threading hole of dynamic device placed cavity connection；Opening/closing lock executing agency is mounted in opening/closing lock executing agency placed cavity, electronic dress It sets and is connected by worm couple with opening/closing lock executing agency；It is characterized in that：The electric device includes motor, connection The worm couple of motor output end, worm gear it is coaxial on output gear is installed；The output gear connects opening/closing lock Executing agency, output gear impart power to opening/closing lock executing agency, realize and unlock and be latched；The opening/closing lock execution machine Structure includes the sliding block that electric device output gear rotary motion is switched to linear motion, and the sliding block is equipped with and is nibbled with output gear The rack of conjunction；The sliding block is slidably installed on the guide bar, and the guide rod is mounted on lock box, the other side institute of opposite rack It states sliding block and is equipped with execution arm, be slidably fitted with locking bar on the execution arm, the locking bar is set in parallel with guide rod；It is locking One end that bar corresponds to dead bolt hole is equipped with lock tongue, and the other end of locking bar installs limition orientation plate；Executing arm and lock tongue inner face Between be set with locking compression spring on locking bar, be set with resetting spring on locking bar between arm and limition orientation plate inner face executing； Lock tongue hole site is corresponded in opening/closing lock executing agency placed cavity and is equipped with sliding slot, and the limition orientation plate and lock tongue are placed on cunning In slot, postive stop baffle is equipped on the sliding slot described in limition orientation plate side.

The utility model can also use following technical measures：

The lock box is equipped with outer connecting seat, and the outer connecting seat is equipped with mounting hole.

The both ends of the guide rod, which are mounted on, to be oriented on rod bearing, and the upper end for being oriented to rod bearing is equipped with U type slot, The both ends of the guide rod are placed in U type slot.

Motor placing groove is equipped in the electric device placed cavity, the motor is placed in motor placing groove, the electricity Motor mount is set on machine, motor mount is equipped with mounting hole, trip bolt, the trip bolt are coated in mounting hole It is connect with the bottom thread of motor placing groove.

Motor placing groove is equipped in the electric device placed cavity, the shell two sides of the motor are planar structure； Motor placing groove medial surface is equipped with the limit stud for preventing electric machine casing from rotating, the two sides of the motor with limit the interior of stud Side is bonded.

The locked position detecting element whether detection lock tongue reaches locked position is installed on lock tongue or dead bolt hole.

The lockset position of coupler detecting element whether detection lock tongue reaches lockset position of coupler is installed on postive stop baffle.

The locked position detecting element and lockset position of coupler detecting element are close to switch, and position sensor or photoelectricity are opened It closes.

The lock tongue is cylindrical type lock tongue or wedge-shaped lock tongue.

The bottom of the lock box is equipped with outer connection mounting hole.

The utility model has the advantages and positive effects of：Since the utility model uses above-mentioned technical proposal, solve Motor can not be complete in the case that electronic lock can not normally realize locking when lock tongue encounters barrier or unlock in the prior art At effective unlocking stroke or locking stroke, since motor continues to rotate at this time for the effective travel that does not reach setting, due to The problem of barrier effect motor long time running of barrier leads to burn-down of electrical machinery；In addition the utility model solves traditional list , be easily damaged the problem of easily stolen with independent lock and integrated mechanical lock, the utility model is used as power using motor, is easy in fact Existing intelligent control, it is easy to accomplish the control of capable of being opened by one key or closing further increases electric vehicle intelligentized control method, improves product Cost performance；The opening and closing locked using intelligentized control method, avoid traditional Dan Peisuo and mechanical lock makes moist the defect got rusty； Also solve the problems, such as that traditional Dan Peisuo and mechanical lock are easy, by technology unlocking, to improve anti-theft performance simultaneously；In addition, of the invention Structure also has simple in structure, and assembly or disassembly is convenient and efficient, and installation site is flexible, unlock, locking it is quick, stability is high, makes With long lifespan, it is applied widely the advantages that.

Description of the drawings

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the utility model internal structure schematic diagram

Fig. 3 is the normal unlock state structure diagram of the utility model；

Fig. 4 encounters barrier structure schematic diagram when being the utility model unlocking condition；

Fig. 5 is the normal blocking structural schematic diagram of the utility model；

Fig. 6 encounters barrier structure schematic diagram when being the utility model unlocking condition；

Fig. 7 is that motor is mounted on motor placement slot structure schematic diagram by trip bolt；

Fig. 8 is lock box without outer connecting base structure schematic diagram；

Fig. 9 is that lock tongue is cylindrical structure schematic diagram；

Figure 10 is that electric device is screw pair structural schematic diagram；

Figure 11 is that electric device is electromagnetic drive structures schematic diagram.

In figure：1, lock box；1-1, dead bolt hole；1-2, electric device placed cavity；1-20, motor placing groove；1-21, limit are vertical Muscle；1-3, opening/closing lock executing agency placed cavity；1-4, threading hole；1-5, outer connecting seat；1-50, mounting hole；1-6, guide rod Bearing；1-7, outer connection mounting hole；2, box cover；3, electric device；3-1, motor；3-10, motor mount；3-11, fastening spiral shell Nail；3-2, worm couple；3-3, output gear；4, opening/closing lock executing agency；4-1, sliding block；4-2, rack；4-3, guiding Bar；4-4, arm is executed；5, locked position detecting element；4-5, locking bar；4-6, lock tongue；4-7, limition orientation plate；4-8, locking pressure Spring；4-9, resetting spring；4-10, sliding slot；4-11, postive stop baffle；6, lockset position of coupler detecting element；7, barrier；8, leading screw, 9, Calutron；9-1, magnetic push rod.

Specific implementation mode

For that can further appreciate that the invention, features and effects of the utility model, the following examples are hereby given, and coordinates Detailed description are as follows for attached drawing：

Please refer to Fig.1 to Fig.3, a kind of power-assisted vehicle electric control mechanical lock, including lock box 1, box cover 2, in lock box Electric device 3 and the opening/closing lock executing agency 4 for connecting electric device, the lock box are equipped with dead bolt hole 1-1, the lock box Interior to be equipped with electric device placed cavity 1-2 and opening/closing lock executing agency placed cavity 1-3, the electric device 3 is mounted on electric device In placed cavity 1-2, the threading hole 1-4 being connected to electric device placed cavity, opening/closing lock executing agency 4 are additionally provided on the lock box In opening/closing lock executing agency placed cavity 1-3, electric device 3 and opening/closing lock executing agency 4 are connected by worm couple It connects, the utility model selects to close using the worm couple that can change the direction of motion, according to the needs of practical power size The reduction ratio of suitable motor and worm and gear；The electric device 3 includes motor 3-1, connects the worm and gear of motor output end Secondary 3-2, worm gear it is coaxial on output gear 3-3 is installed；The output gear connects opening/closing lock executing agency 4, output gear Wheel imparts power to opening/closing lock executing agency, realizes and unlocks and be latched；The opening/closing lock executing agency 4 includes by electronic dress The sliding block 4-1 that output gear 3-3 rotary motions switch to linear motion is set, the sliding block is equipped with the rack engaged with output gear 4-2；The sliding block is slidably mounted on guide rod 4-3, and the guide rod 4-3 is mounted on lock box 1, the other side of opposite rack The sliding block 4-1, which is equipped with, executes arm 4-4, locking bar 4-5 is slidably fitted on the execution arm, the locking bar is with guide rod in flat Row setting；One end that dead bolt hole is corresponded in locking bar is equipped with lock tongue 4-6, and lock tongue is wedge-shaped lock tongue in the present embodiment, locking bar it is another Limition orientation plate 4-7 is installed one end；Locking compression spring 4-8 is set between arm and lock tongue inner face on locking bar executing, is being executed Between arm 4-4 and limition orientation plate 4-7 inner faces resetting spring 4-9 is set on locking bar 4-5；It is put in opening/closing lock executing agency It sets and corresponds to lock tongue hole site in chamber 1-3 and be placed in sliding slot equipped with sliding slot 4-10, the limition orientation plate 4-7 and lock tongue 4-6, Sliding slot described in limition orientation plate side is equipped with postive stop baffle 4-11.

The utility model may be used in actual installation is arranged outer connection mounting hole 1-7 in lock box bottom, passes through outer company Fitting is mounted on position different on vehicle using motor and realizes to the locking of different component, please refers to Fig. 8；In order to meet different installations Demand, the lock box be equipped with outer connecting seat 1-5, China and foreign countries' connecting seat both can and case weld, also come integrated punching, note Modeling, pouring molding；The outer connecting seat is equipped with mounting hole 1-50, can be installed the utility model by outer connector in this way It is please referred to Fig.1 on vehicle using motor.

In order to improve the support strength of guide rod, while it being easily installed guide rod, the both ends of the guide rod 4-3 are mounted on It is oriented on rod bearing 1-6, the upper end for being oriented to rod bearing is equipped with U type slot 1-4, and the both ends of the guide rod are placed on U In type groove mouth.Practical set formula installs sliding block on the guide bar, then the both ends of guide rod is placed in U type slot, so Sliding slider makes it be engaged with output gear 3-3 afterwards, that is, completes the assembly of guide rod and sliding block, convenient and efficient；Prevent guide rod It is detached from after U type slot is pressed by box cover 2 and realizes.

Motor placing groove 1-20 is equipped in the electric device placed cavity 1-2, the motor is placed in motor placing groove, Motor mount 3-10 is set on the motor, motor mount is equipped with mounting hole, trip bolt 3- is coated in mounting hole 11, the trip bolt is connect with the bottom thread of motor placing groove 1-20, realizes the connection of motor, using this connection type pair The basic no requirement (NR) of shape of motor please refers to Fig. 7 as long as can put into motor placing groove can install and use.

Motor placing groove 1-20 is equipped in the electric device placed cavity 1-2, the shell two sides of the motor are plane Structure；Motor placing groove medial surface be equipped with prevent electric machine casing rotate limit stud 1-21, the two sides of the motor with Limit the inside fitting of stud；Preventing motor to be detached from motor placing groove is realized by the box cover after the completion of assembly, is used This connection type is customized to the shape of motor, please refers to Fig. 2.

Reach specified locked position when in order to realize accurate detection, detection lock is installed on lock tongue or dead bolt hole Whether tongue reaches the locked position detecting element 5 of locked position.

Reach specified lockset position of coupler when in order to realize accurate detection, detection lock tongue is installed on postive stop baffle whether Reach the lockset position of coupler detecting element 6 of lockset position of coupler.

The locked position detecting element 5 and lockset position of coupler detecting element 6 are close to switch, position sensor or photoelectricity Switch.

The lock tongue may be cylindrical type lock tongue, such as Fig. 9.

Utility model works principle executes the both sides arm 4-4 at this time referring to Fig. 3, in normal state, motor is static Locking compression spring 4-8 and resetting spring 4-9 in the raw, locking and locking are realized in the positive and negative rotation by controlling motor, After being connected to upper lock signal, motor rotates forward, and output gear 3-3 rotates counterclockwise under the drive of motor and worm couple, this When the rack drives sliding block 4-1 that is engaged with output gear 3-3 moved towards dead bolt hole direction along guide rod 4-3, and then sliding block Locking compression spring mono- motive force of 4-8 will be given by executing arm, and by locking, compression spring transmits the force to lock tongue, under the action of this motive force Lock tongue drives locking bar to be moved towards dead bolt hole direction, and then realizes locking action, until sliding block 4-1 covers the locking row of setting Journey please refers to Fig. 5；Barrier 7 is encountered in front of lock tongue during locking, referring to Fig. 6, lock tongue and locking bar can not continue to Preceding movement, spring of locking at this time will start storage and execute the motive force that travels forward of arm, until sliding block cover be set in advance it is whole A locking stroke；After barrier removes latch bolt position, under the action of locking spring, lock tongue is made quickly to release dead bolt hole, on It locks spring release and completes locking action.After being connected to unlocking signal, motor rotates forward, and output gear 3-3 is in motor and worm and gear It is rotated clockwise under secondary drive, the rack drives sliding block 4-1 engaged at this time with output gear 3-3 carries lock along guide rod 4-3 Tongue apertures direction moves, and then the execution arm of sliding block will give mono- motive force of reseting pressuring spring 4-9, be transmitted the force to by reseting pressuring spring Limition orientation plate, lock tongue drives locking bar to carry the movement of dead bolt hole direction under the action of this motive force, and then realizes unlocking action, Until sliding block 4-1 covers the unlocking stroke of setting；When lock tongue is by barrier clamping, when can not normally unlock, referring to Fig. 4, lock Tongue and locking bar can not move forward, and resetting spring executes the motive force that arm travels forward by storage is started at this time, until cunning Block covers the entire unlocking stroke being set in advance；After barrier removes latch bolt position, under the action of resetting spring, make lock tongue And locking action is completed in locking bar Rapid reset, resetting spring release.Using above-mentioned technical proposal, electronic lock in the prior art is solved Motor can not complete effective unlocking stroke in the case of can not normally realizing locking when lock tongue encounters barrier or unlocking Or locking stroke causes on motor the time to be remained in operation the problem of causing burn-down of electrical machinery.

In addition the utility model solves that traditional list is easily stolen with independent lock and integrated mechanical lock, asking of being easily damaged Topic, the utility model is using motor as power, it is easy to accomplish intelligent control, it is easy to accomplish the control of capable of being opened by one key or closing, Electric vehicle intelligentized control method is further increased, the cost performance of product is improved；The opening and closing locked using intelligentized control method, are kept away Traditional Dan Peisuo is exempted from and mechanical lock makes moist the defect got rusty；It also solves traditional Dan Peisuo simultaneously and mechanical lock is easy by technology The problem of unlocking, improves anti-theft performance；In addition, structure of the invention also have it is simple in structure, assembly or disassembly is convenient and efficient, peace Holding position is flexible, unlock, locking it is quick, the advantages that stability is high, and service life is long, the scope of application of the utility model product compared with Extensively, such as the advantages that handlebar steering lock, saddle lock, car door lock, battery lock, while the utility model is also applied to other skills Art field such as antitheft door.

The above is only the preferred embodiment to the utility model, is not made in any form to the utility model Limitation, it is every according to the technical essence of the utility model any simple modification made to the above embodiment, equivalent variations with Modification, such as：Such as Figure 10, electric device includes motor, connects the leading screw 8 of motor output end, is equipped in the sliding block and leading screw The internal thread of cooperation；The leading screw and sliding block 4-1 constitute screw pair；Such as Figure 11, the electric device uses electromagnetic drive Device, including calutron 9 and magnetic push-pull bar 9-1, the magnetic push-pull bar connection sliding block 4-1.Belong to the utility model In the range of technical solution.

Claims (10)

1. a kind of power-assisted vehicle electric control mechanical lock, including lock box, box cover, the electric device in lock box and connection are electronic The opening/closing lock executing agency of device, the lock box are equipped with dead bolt hole, be equipped with electric device placed cavity in the lock box and open/ Be latched executing agency placed cavity, the electric device is mounted in electric device placed cavity, be additionally provided on the lock box with it is electronic The threading hole of device placed cavity connection；Opening/closing lock executing agency is mounted in opening/closing lock executing agency placed cavity, electric device It is connected by worm couple with opening/closing lock executing agency；It is characterized in that：The electric device includes motor, connection electricity The worm couple of machine output end, worm gear it is coaxial on output gear is installed；The output gear connects opening/closing lock and executes Mechanism, output gear impart power to opening/closing lock executing agency, realize and unlock and be latched；The opening/closing lock executing agency packet The sliding block that electric device output gear rotary motion is switched to linear motion is included, the sliding block is equipped with and is engaged with output gear Rack；The sliding block is slidably installed on the guide bar, and the guide rod is mounted on lock box, sliding described in the other side of opposite rack Block, which is equipped with, executes arm, is slidably fitted with locking bar on the execution arm, the locking bar is set in parallel with guide rod；In locking bar pair Answer one end of dead bolt hole that lock tongue is installed, the other end of locking bar installs limition orientation plate；It is executing between arm and lock tongue inner face It is set with locking compression spring on locking bar, resetting spring is set on locking bar between arm and limition orientation plate inner face executing；Open/ Lock tongue hole site, which is corresponded to, in locking executing agency placed cavity is equipped with sliding slot, the limition orientation plate and lock tongue are placed in sliding slot, Postive stop baffle is equipped on the sliding slot described in limition orientation plate side.

2. power-assisted vehicle electric control mechanical lock according to claim 1, it is characterised in that：The lock box is equipped with outer connection Seat, the outer connecting seat are equipped with mounting hole.

3. power-assisted vehicle electric control mechanical lock according to claim 1, it is characterised in that：The both ends of the guide rod are mounted on It is oriented on rod bearing, the upper end for being oriented to rod bearing is equipped with U type slot, and the both ends of the guide rod are placed on U type slot It is interior.

4. power-assisted vehicle electric control mechanical lock according to claim 1, it is characterised in that：It is set in the electric device placed cavity There are motor placing groove, the motor to be placed in motor placing groove, motor mount is set on the motor, is set on motor mount There is mounting hole, trip bolt is coated in mounting hole, the trip bolt is connect with the bottom thread of motor placing groove.

5. power-assisted vehicle electric control mechanical lock according to claim 1, it is characterised in that：It is set in the electric device placed cavity There is motor placing groove, the shell two sides of the motor are planar structure；Being equipped in motor placing groove medial surface prevents motor casing The two sides of the limit stud of body rotation, the motor are bonded with the inside of limit stud.

6. power-assisted vehicle electric control mechanical lock according to claim 1, it is characterised in that：It is installed on lock tongue or dead bolt hole Have whether detection lock tongue reaches the locked position detecting element of locked position.

7. power-assisted vehicle electric control mechanical lock according to claim 6, it is characterised in that：Detection is installed on postive stop baffle Whether lock tongue reaches the lockset position of coupler detecting element of lockset position of coupler.

8. power-assisted vehicle electric control mechanical lock according to claim 7, it is characterised in that：The locked position detecting element and Lockset position of coupler detecting element is close to switch, position sensor or optoelectronic switch.

9. power-assisted vehicle electric control mechanical lock according to claim 1, it is characterised in that：The lock tongue be cylindrical type lock tongue or Person's wedge shape lock tongue.

10. power-assisted vehicle electric control mechanical lock according to claim 1, it is characterised in that：The bottom of the lock box is equipped with outer Connect mounting hole.