CN217552085U

CN217552085U - Automatic feeding spray head polishing machine equipment

Info

Publication number: CN217552085U
Application number: CN202221195216.4U
Authority: CN
Inventors: 周进
Original assignee: Nan'an New Road Automation Equipment Co ltd
Current assignee: Nan'an New Road Automation Equipment Co ltd
Priority date: 2022-05-17
Filing date: 2022-05-17
Publication date: 2022-10-11
Anticipated expiration: 2032-05-17

Abstract

The utility model discloses an automatic feeding shower head burnishing machine equipment, include the burnishing device that carries out the surface finish to the work piece, still include conveyor, the last work piece that supplies the work piece suit to the outside of conveyor places the seat, loading attachment includes the fixing base, be equipped with on the fixing base and supply the work piece to place the board on, install on the fixing base and turn to the rotary mechanical arm above the seat is placed to the work piece from placing the board, install the finger cylinder that can go up and down and clamp the work piece and put on the rotary mechanical arm, install the work piece collection device that its collection end carries out image acquisition to the work piece towards placing the board on the rotary mechanical arm; burnishing device has and to carry out the piece of polishing of accurate polishing to shower head workpiece surface many, compares with prior art and can save a large amount of labours, and whole course of working is automated operation, need not too much manual intervention, and this equipment can continuous operation, further improvement work efficiency.

Description

Automatic material loading shower head burnishing machine equipment

Technical Field

The utility model relates to an automation equipment field especially relates to an automatic material loading shower head burnishing machine equipment.

Background

As is well known, the existing spray header workpiece needs to be manually taken one by one to be attached to the surface of the spray header workpiece by the polishing wheel on the polishing machine when being polished, but the spray header workpiece is traditionally placed on the polishing machine through manual work to be polished, the spray header workpiece needs to be manually and uninterruptedly grabbed to be polished one by one, the work efficiency is low, and the labor amount of workers is large.

Accordingly, the present inventors have made extensive studies on the above problems, and as a result, the present invention has been made.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can carry out the material loading to the shower head work piece automatically, and can carry out the surface burnishing and polishing to the shower head work piece after the material loading automatically, need not too much manual intervention, save the labour, and the automatic feeding shower head burnishing machine equipment that work efficiency is high.

Automatic material loading shower head burnishing machine equipment, including the burnishing device who carries out surface finish to the work piece, still including carrying out the conveyor who carries the work piece, the last work piece that supplies the work piece suit outside that has of conveyor places the seat, and the seat is placed to the work piece is provided with a plurality of, and the seat is placed along conveyor's direction of delivery interval to each work piece, burnishing device is outside conveyor, conveyor is equipped with the loading attachment who places the seat with work piece material loading to work piece outward, and loading attachment includes the fixing base, is equipped with on the fixing base and supplies the work piece to place the board of placing on, installs on the fixing base and can turn to the rotatory arm to the work piece above placing the seat from placing the board, installs the finger cylinder that can go up and down and press from both sides the work piece and put on the rotatory arm, installs the work piece collection device that its collection end orientation was placed the board and was carried out image acquisition to the work piece on the rotatory arm.

The polishing device is characterized by further comprising a shell, the shell is of a hollow structure, the conveying direction of the conveying device is the left-right direction, extending holes for the conveying device to extend out are formed in the left side wall and the right side wall of the shell, the conveying device is installed in the shell, the two ends of the conveying device correspondingly extend out of the shell through the extending holes, the polishing device is installed in the shell, and the feeding device is located outside the left side of the shell and outside the front side of the conveying device.

The conveying device is provided with the mounting plate, the conveying chain and the transmission chain wheels, the transmission chain wheels are provided with two transmission chain wheels, the transmission chain wheels are wound outside the two transmission chain wheels, the wheel centers of the transmission chain wheels are sleeved with the inherent rotating shafts, the rotating shafts are rotatably mounted on the shell, the shell is located at one rotating shaft and is provided with the motor driving device for driving the rotating shafts to rotate, the mounting plate is mounted on the outer side face of the conveying chain, the mounting plate is provided with a plurality of mounting plates, the mounting plates are distributed at intervals along the circumferential direction of the transmission chain, and the workpiece placing seat is fixedly mounted on the mounting plate.

The workpiece placing seat comprises a fixing piece, a lower base plate and a connecting block, wherein the lower base plate is fixedly locked on a mounting plate, the connecting block is fixedly erected on the lower base plate and is perpendicular to the mounting plate, the fixing piece is composed of two pieces which are transversely arranged at opposite intervals, and the fixing piece is in a perpendicular state relative to the outer surface of the mounting plate.

The outer side wall of the conveying chain is fixed with locking blocks which are matched with the mounting plates in an overlapped mode corresponding to the mounting plates, and the mounting plates and the locking blocks are locked together.

The polishing device is provided with a plurality of polishing devices, the polishing devices are arranged above the front side and the rear side of the conveying device respectively, the polishing devices on the front side and the rear side of the conveying device are arranged at intervals along the left-right direction, vertical plates for fixing the polishing devices are arranged in the shell, and the polishing devices are arranged on the vertical plates.

The board of placing is kept flat and is set up and fix on the trailing flank of fixing base, rotary mechanical arm has the control box, driving motor and cross arm, the control box is fixed on the top surface of fixing base, driving motor installs in the control box, and driving motor's output shaft sets up, the cross arm is along the decurrent setting of fore-and-aft direction, the front end of cross arm is connected with driving motor's output shaft transmission, swivel mount in the rear end top surface fixed mounting of cross arm, the unsettled rear end that is in the cross arm of well swivel mount outside, swivel mount rear side is equipped with the drive actuating cylinder of erectting the setting in the above-mentioned, the above-mentioned output that drives actuating cylinder sets up down, install the installation pole of erectting the setting on the output of drive actuating cylinder, above-mentioned finger cylinder erects and installs on the installation pole.

The workpiece collecting device is a camera, the camera is installed on the bottom surface of the transverse connecting arm, and the collecting end of the camera is arranged downwards.

The polishing device is provided with an inner fixing plate, a driving motor, a shell and a polishing wheel, wherein a vertical plate extending along the left and right directions of the shell is fixed on the inner top surface of the shell, the inner fixing plate is locked on the vertical plate and is positioned below the vertical plate, the driving motor is vertically installed on the inner fixing plate, an output shaft of the driving motor is arranged upwards, the shell is installed on the driving motor, the polishing wheel is positioned below the shell and is rotatably installed on the shell, and the driving motor is in transmission connection with the polishing wheel through a conveying belt.

The polishing wheel is horizontally arranged, a rotating shaft is fixedly and vertically arranged on the wheel center of the polishing wheel, the rotating shaft is rotatably arranged in the shell through a mounting bearing, the upper end of the rotating shaft upwards extends out of the shell, the upper end of the rotating shaft is sleeved with the inherent belt pulley, and the conveying belt is wound on the belt pulley.

The utility model discloses an automatic material loading shower head burnishing machine equipment, during the application, the staff only needs to carry out the circular telegram with this equipment and starts, through place the work piece at the upper surface of placing the board, the rethread camera carries out the work piece shooting discernment on placing the board, can press from both sides the work piece through the finger cylinder on the loading attachment, the work piece displacement to corresponding transmission device on the stationary blade vertical top on the swing of rethread transverse arm drives the finger cylinder, the rethread installation pole drives the middle part fretwork cover of work piece and overlaps the outside at the stationary blade, the stationary blade of constituteing through two lamellar bodies can be with the stable fixed of work piece, the work piece of having overlapped on with the stationary blade through conveying mechanism conveys toward the inside direction of shell, drive the driving motor on the burnishing device and drive the burnishing wheel and carry out high-speed rotation, the work piece that can fix on the stationary blade is polished by the burnishing wheel when polishing wheel, and all be equipped with three burnishing device through conveying device's front and back both sides top, can make the both sides of work piece all polish, efficiency has further been improved. Compared with the prior art, a large amount of labor force can be saved, the whole machining process is automatic operation, excessive manual intervention is not needed, the equipment can continuously work, and the working efficiency is further improved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is another schematic structural diagram of the present invention;

fig. 3 is a schematic view of another structure of the present invention.

Detailed Description

The utility model discloses an automatic material loading shower head burnishing machine equipment, as shown in fig. 1-3, include the burnishing device who carries out surface finish to the work piece, still including carrying out the conveyor who carries the work piece, conveyor is last to have the work piece that supplies the work piece suit outside and place seat 24, and the work piece is placed seat 24 and is provided with a plurality of, and each work piece is placed seat 24 and is arranged along conveyor's direction of delivery interval, burnishing device is outside conveyor, conveyor is equipped with the loading attachment who places seat with work piece material loading to work piece outward, and loading attachment includes fixing base 31, is equipped with on fixing base 31 to supply the work piece to place board 33 on, installs on fixing base 31 to turn to the rotary mechanical arm who places seat 24 top to the work piece from placing board 33 top, installs on the rotary mechanical arm can the oscilaltion and press from the finger cylinder (not drawn in the picture) that the work piece pressed from both sides and put, and the finger cylinder has two clamping jaws, controls relative setting, installs the work piece collection end orientation on the rotary mechanical arm and places board 33 and carries out image acquisition device to the work piece.

Excellent, automatic feeding burnishing machine equipment, still including shell 1, shell 1 is hollow structure, use conveyor's direction of delivery as left right direction, set up the hole that stretches out that supplies conveyor to stretch out on the left and right both sides wall of shell, conveyor installs in shell 1, and conveyor's both ends correspond through the hole that stretches out outside shell 1, burnishing device installs in shell 1, loading attachment is outside 1 left side of shell, and be in conveyor's front side outside, thereby make loading attachment can place the seat 24 with the work piece that the work piece fed on conveyor on.

The following are preferred: the conveying device is provided with a mounting plate 21, a conveying chain 22 and two transmission chain wheels 23, the two transmission chain wheels 23 are arranged, the conveying chain 22 is wound outside the two transmission chain wheels 23, namely the two transmission chain wheels 23 are respectively arranged outside the left side and the right side of the shell 1, a rotating shaft (not shown in the figure) is fixedly sleeved on the wheel center of the transmission chain wheels 23 and horizontally arranged along the front-back direction, mounting arms extending to the rotating shaft are respectively arranged on the left side and the right side of the shell 1 and are arranged behind the rotating shaft, the rear end part of the rotating shaft is rotatably mounted on the mounting arms through bearings, the conveying chain 22 is wound on the transmission chain wheels 23, a motor driving device for driving the rotating shaft to rotate is mounted on one rotating shaft of the shell 1, namely a motor driving device is mounted on one mounting arm, the motor driving device is well known and is not described herein, the outer side surface of the conveying chain 22 is provided with a plurality of mounting plates 21, the mounting plates 21 are distributed at intervals along the circumferential direction of the conveying chain 22, the mounting plates 21 can be conveyed in the same direction through the rotation of the conveying chain 22, preferably, the mounting plates 21 are arranged on the upper surface and the lower bottom surface of the conveying chain 22, the mounting plates 21 which are positioned on the upper surface of the conveying chain are arranged at intervals along the left-right direction, the mounting plates 21 which are positioned on the lower bottom surface of the conveying chain are arranged at intervals along the left-right direction, the mounting plates 21 are square plates, preferably, the chain links of the conveying chain 22 corresponding to the mounting plates 21 are fixedly provided with locking blocks 221 which are matched with the mounting plates 21 in an overlapped mode, the mounting plates 21 and the locking blocks 221 are connected together through screws, the surfaces of the locking blocks 221 are flat, and the locking blocks can be locked with the bottoms of the flat mounting plates 21 more tightly.

The workpiece placing seat 24 is fixedly mounted on the mounting plate 21, preferably, the workpiece placing seat 24 includes a fixing piece 241, a lower bottom plate 242 and a connecting block 243, the lower bottom plate 242 is locked on the mounting plate 21 by a screw, the connecting block 243 is fixedly erected on the lower bottom plate 242 and is arranged perpendicular to the mounting plate 21, the fixing piece 241 is composed of two pieces which are transversely arranged at an interval, the fixing piece 241 is in a perpendicular state relative to the outer surface of the mounting plate 21, and the fixing piece 241 in the perpendicular state can enable a workpiece to be flatly clamped outside the fixing piece 241; during the application, drive the axis of rotation through motor drive arrangement and rotate, thereby make drive sprocket 23 rotate, the rotation of two drive sprocket 23 of rethread drives conveying chain 22 and moves, thereby make the mounting panel 21 of lock solid on conveying chain 22 through locking piece 221 lock solid can synchronous transmission, thereby make the work piece place the seat 24 can carry out the transmission, and the work piece is under loading attachment's cooperation, can embolia the stationary blade 241 outside with the middle part fretwork, it is inboard to fix the work piece to the work piece by two outside laminating work piece middle parts fretworks of stationary blade 241 again, thereby make the work piece on the stationary blade 241 can be steady transmitted to burnishing device and carry out polishing treatment.

The polishing device is provided with a plurality of polishing devices, preferably, a plurality of polishing devices are arranged above the front side and the rear side of the conveying device, preferably, three polishing devices are arranged above the front side and the rear side of the conveying device, the polishing devices on the front side and the rear side of the conveying device are arranged at intervals along the left-right direction, vertical plates (not shown in the figure) for fixing the polishing devices are arranged in the shell 1, the polishing devices are arranged on the vertical plates, so that the polishing devices can stably operate, preferably, the polishing devices are provided with inner fixing plates 41, driving motors 42, a shell 43 and polishing wheels 432, the vertical plates extend along the left-right direction of the shell 1 and are provided with two vertical plates, the two vertical plates are arranged at intervals front and rear, the inner fixing plates 41 are locked on the vertical plates and are positioned below the vertical plates, the driving motors 42 are vertically arranged on the inner fixing plates 41, the output shaft of the driving motor 42 is arranged upwards, the fixed belt pulley 421 is sleeved outside the output shaft of the driving motor 42, the housing 4343 is installed on the driving motor 42, the polishing wheel 432 is positioned below the housing 43 and is rotatably installed on the housing 43, the driving motor 42 is in transmission connection with the polishing wheel 432 through the transmission belt 44, preferably, the polishing wheel 432 is horizontally arranged, a rotating shaft (not shown in the figure) is fixedly erected on the wheel center of the polishing wheel 432, the rotating shaft is rotatably installed in the housing 43 through an installation bearing, the upper end part of the rotating shaft extends upwards out of the housing 43, the fixed belt pulley 433 is sleeved outside the upper end part of the rotating shaft, the transmission belt 44 is wound on the belt pulley 433 and the belt pulley 421, and the power output by the driving motor 42 can be transmitted to the belt pulley 433 through the transmission belt 44; during the application, rotate through driving motor 42 circular telegram, rethread conveyer 44 can drive the belt pulley 433 that is connected with conveyer 44 and carry out synchronous rotation, thereby make belt pulley 433 can drive polishing wheel 432 through the inside axis of rotation of casing 43 and rotate, so time polishing wheel 432 can polish the workpiece surface of installation on stationary blade 241, and all be equipped with three burnishing device through conveyor's front and back both sides top, the both sides that can make the work piece are all polished, further efficiency has been improved.

The fixing base 31 is a square upright column, the placing plate 33 is flatly placed and fixed on the rear side face of the fixing base 31, the rotary mechanical arm is provided with a control box 32, a driving motor and a transverse connecting arm 35, the control box 32 is fixed on the top face of the fixing base 31, the driving motor is installed in the control box 32, an output shaft of the driving motor faces upwards, the transverse connecting arm 35 is horizontally arranged along the front-back direction, the front end portion of the transverse connecting arm 35 is in transmission connection with the output shaft of the driving motor, specifically, the output shaft of the driving motor extends out of the top face of the control box 32, a driving wheel fixedly sleeved outside the output shaft of the driving motor is fixed on the bottom face of the transverse connecting arm 35, a middle rotary seat 34 is fixedly installed on the top face of the rear end portion of the transverse connecting arm 35, a driving cylinder vertically arranged is arranged in the rear side of the middle rotary seat 34, an output end (namely a piston rod) of the driving cylinder faces downwards, an installation rod 341 vertically arranged is installed on the output end (namely a piston rod) of the driving cylinder, and a finger cylinder is installed on the installation rod 341. When the device is used, the transverse connecting arm 35 is driven to rotate by the driving motor, the finger cylinder is rotated to the position right above the placing plate 33 through the transverse connecting arm, the driving cylinder is started, the driving mounting rod moves downwards, the finger cylinder is contacted with a workpiece on the placing plate 33, the workpiece can be clamped by starting the finger cylinder, then the driving cylinder is reset, the workpiece on the finger cylinder is lifted from the placing plate 33, the driving motor drives the transverse connecting arm 35 to rotate again, and the workpiece on the finger cylinder can be transferred to the fixing seat by the rotation of the transverse connecting arm. In this novel, install control chip in the control box 32, this control chip's control principle is prior art.

The workpiece collecting device is a camera, the camera is installed on the bottom surface of the transverse connecting arm 35, the collecting end of the camera is arranged downwards, the camera is arranged close to the finger cylinder, and the output end of the camera is electrically connected with the input end of the control chip in the control box; during the application, the work piece is placed on placing board 33, and the camera carries out image acquisition to the work piece this moment, and the data transmission of collection is to the control chip of control box 32, and control chip receives to drive after the data acquisition drive actuating cylinder and starts, drives actuating cylinder and can control installation pole 341 and carry out fore-and-aft lift, and moving down of installation pole 341 makes the accurate whereabouts of finger cylinder to the work piece department of placing the board, and the finger cylinder starts to press from both sides the work piece this moment and gets.

The utility model discloses an automatic feeding shower head burnishing machine equipment, when using, place the upper surface of placing board 33 with a plurality of work pieces unification, it is rotatory to link arm 35, the finger cylinder rotates directly over to placing the board, the camera carries out shooting the discernment to the work piece of placing on the board 33 this moment, control chip drive actuating cylinder control installation pole 341 in the control box 32 descends, the accurate whereabouts of finger cylinder is to work piece department, finger cylinder starts can press from both sides tight work piece, installation pole 341 drives the finger cylinder and rises, work piece displacement on the finger cylinder is driven in the swing of rethread link arm 35 places seat 24 perpendicular top to the one of which work piece on the transmission device, rethread installation pole 341 drives finger cylinder decline stationary blade 241 and embolias the middle part fretwork district of work piece in, realize the fixed placing of work piece, it rotates to drive sprocket 23 through motor drive, drive sprocket 23 rotates, this rotation drives transmission chain 22 operation, the work piece of fixing on transmission chain 22 is placed seat 24 and can be removed, and then the work piece can be brought into shell 1 inside and to polishing device department through transport the rotation of polishing belt wheel 433 of conveying belt wheel, it all is connected to the inside the polishing device top to have carried out through transport the polishing device that conveying belt wheel 433 has been carried out to the rotation of conveying belt 44, thereby make the work piece on both sides. Compared with the prior art, this neotype automatic feeding shower head burnishing machine equipment, whole course of working is automatic operation, need not too much manual intervention, can save a large amount of labours, and the work piece enables a work piece to carry out the material loading when the polishing, have again with the setting of a plurality of burnishing devices of one side, make each work piece need not to process on a burnishing device, can divide into a plurality of burnishing devices and process the completion, when placing the translation in the shell again behind the back work piece on the seat is placed to the work piece like this, process to the corresponding polishing of transferring to another burnishing device of some work piece, the corresponding polishing of transferring to one of them burnishing device of work piece not processed, make whole flow can the continuous operation, further improvement work efficiency.

The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications made by those skilled in the art should be considered as not departing from the scope of the present invention.

Claims

1. Automatic material loading shower head burnishing machine equipment includes the burnishing device who carries out surface finish to the work piece, its characterized in that: the polishing device is arranged outside the conveying device, a feeding device for feeding the workpieces to the workpiece placing seats is arranged outside the conveying device, the feeding device comprises a fixing seat, a placing plate for placing the workpieces is arranged on the fixing seat, a rotary mechanical arm capable of turning to the position above the workpiece placing seat from the position above the placing plate is installed on the fixing seat, a finger cylinder capable of lifting up and down and clamping the workpieces is installed on the rotary mechanical arm, and a workpiece collecting device for collecting images of the workpieces is installed on the rotary mechanical arm, wherein the workpiece placing seats are used for accommodating the workpieces and are arranged outside the conveying device at intervals along the conveying direction of the conveying device.

2. The automatic loading showerhead polisher apparatus of claim 1 further characterized by: the polishing device is characterized by further comprising a shell, the shell is of a hollow structure, the conveying direction of the conveying device is the left-right direction, extending holes for the conveying device to extend out are formed in the left side wall and the right side wall of the shell, the conveying device is installed in the shell, the two ends of the conveying device correspondingly extend out of the shell through the extending holes, the polishing device is installed in the shell, and the feeding device is located outside the left side of the shell and outside the front side of the conveying device.

3. The automatic loading showerhead polisher apparatus of claim 2 further characterized by: the conveying device is provided with the mounting plate, the conveying chain and the transmission chain wheels, the transmission chain wheels are provided with two transmission chain wheels, the transmission chain wheels are wound outside the two transmission chain wheels, the wheel centers of the transmission chain wheels are sleeved with the inherent rotating shafts, the rotating shafts are rotatably mounted on the shell, the shell is located at one rotating shaft and is provided with the motor driving device for driving the rotating shafts to rotate, the mounting plate is mounted on the outer side face of the conveying chain, the mounting plate is provided with a plurality of mounting plates, the mounting plates are distributed at intervals along the circumferential direction of the transmission chain, and the workpiece placing seat is fixedly mounted on the mounting plate.

4. The automatic-loading showerhead polisher apparatus of claim 3 further comprising: the workpiece placing seat comprises a fixing piece, a lower base plate and a connecting block, wherein the lower base plate is fixedly locked on a mounting plate, the connecting block is fixedly erected on the lower base plate and is perpendicular to the mounting plate, the fixing piece is composed of two pieces which are transversely arranged at opposite intervals, and the fixing piece is in a perpendicular state relative to the outer surface of the mounting plate.

5. The automatic loading showerhead polisher apparatus of claim 3 with the following features: the outer side wall of the conveying chain is fixed with locking blocks which are matched with the mounting plates in an overlapped mode corresponding to the mounting plates, and the mounting plates and the locking blocks are locked together.

6. The automatic-loading showerhead polisher apparatus of claim 2 further comprising: the polishing devices are arranged on the front side and the rear side of the conveying device, the polishing devices on the front side and the rear side of the conveying device are arranged at intervals in the left-right direction, vertical plates for fixing the polishing devices are arranged in the shell, and the polishing devices are installed on the vertical plates.

7. The automatic-loading showerhead polisher apparatus of claim 2 further comprising: the board of placing is kept flat and is set up and fix on the trailing flank of fixing base, rotary mechanical arm has the control box, driving motor and cross arm, the control box is fixed on the top surface of fixing base, driving motor installs in the control box, and driving motor's output shaft sets up, the cross arm is along the decurrent setting of fore-and-aft direction, the front end of cross arm is connected with driving motor's output shaft transmission, swivel mount in the rear end top surface fixed mounting of cross arm, the unsettled rear end that is in the cross arm of well swivel mount outside, swivel mount rear side is equipped with the drive actuating cylinder of erectting the setting in the above-mentioned, the above-mentioned output that drives actuating cylinder sets up down, install the installation pole of erectting the setting on the output of drive actuating cylinder, above-mentioned finger cylinder erects and installs on the installation pole.

8. The automatic loading showerhead polisher apparatus of claim 1 further characterized by: the workpiece collecting device is a camera which is arranged on the bottom surface of the transverse connecting arm, and the collecting end of the camera is arranged downwards.

9. The automatic loading showerhead polisher apparatus of claim 2 further characterized by: the polishing device is provided with an inner fixing plate, a driving motor, a shell and a polishing wheel, wherein a vertical plate extending along the left and right directions of the shell is fixed on the inner top surface of the shell, the inner fixing plate is locked on the vertical plate and is positioned below the vertical plate, the driving motor is vertically installed on the inner fixing plate, an output shaft of the driving motor is arranged upwards, the shell is installed on the driving motor, the polishing wheel is positioned below the shell and is rotatably installed on the shell, and the driving motor is in transmission connection with the polishing wheel through a conveying belt.

10. The automatic-loading showerhead polisher apparatus of claim 9 further comprising: the polishing wheel is horizontally arranged, a rotating shaft is fixedly and vertically arranged on the wheel center of the polishing wheel, the rotating shaft is rotatably arranged in the shell through a mounting bearing, the upper end of the rotating shaft upwards extends out of the shell, the upper end of the rotating shaft is sleeved with the inherent belt pulley, and the conveying belt is wound on the belt pulley.