CN110823083A - Detection device and detection method for detecting protruding height of engine piston - Google Patents
Detection device and detection method for detecting protruding height of engine piston Download PDFInfo
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Abstract
The invention relates to the technical field of engine assembly, in particular to a detection device for detecting the protruding height of an engine piston and a detection method thereof, wherein the detection device comprises a moving mechanism, a detection mechanism, a rotating mechanism and a limiting device, the moving mechanism comprises a horizontal driving electric cylinder and a supporting frame, the limiting device comprises two limiting mechanisms, the detection mechanism comprises a detection flat plate, a lifting air cylinder and a plurality of displacement sensors, and the rotating mechanism comprises a rotating assembly and a contraposition assembly; the crankshaft can be automatically aligned and driven to rotate through the rotating mechanism, the efficiency of driving the crankshaft to rotate is improved, and manual operation steps are reduced; through stop device, can fix the engine cylinder body that is detecting piston protrusion height, reduce the engine cylinder body amplitude of quivering, reduce and detect the data error, improve the stability that detects data.
Description
Technical Field
The invention relates to the technical field of engine assembly, in particular to a detection device and a detection method for detecting the protruding height of an engine piston.
Background
With the trend of environmental protection, in order to promote the technical progress of preventing and controlling the pollution of the motor vehicle and improve the environmental quality, the national ministry of ecological environment and the national central office of market supervision and management jointly release the emission limit value and the measurement method of pollutants for heavy-duty diesel vehicles (the sixth stage of China), and compared with the fifth standard of China, the emission requirements of the sixth standard of China on gaseous pollutants and particle pollutants are more strict.
Compared with the current national fifth standard, the emission reduction of the national sixth automobile emission standard on gasoline vehicles can reach 10%, and the emission reduction rate of non-methane organic gas and nitrogen oxide can reach 8-12% on the whole; the nitrogen oxide emission of diesel vehicles can be reduced by 4.6 percent, and the particulate matter can be reduced by 9.1 percent.
In order to reduce the emission of gaseous pollutants and particle pollutants and meet the requirements of regulations, the existing engines adopt gasoline or diesel in-cylinder direct injection technology and multipoint electronic injection technology, and the aims of improving the atomization rate of gasoline or diesel, improving the combustion efficiency, ensuring the sufficient combustion of gasoline or diesel and reducing the content of nitrogen oxide in tail gas are fulfilled; some methods adopt an optimized three-way catalyst to improve the emission of the tail gas.
The performance of the engine is related to the overall performance of the automobile, and when the engine piston moves in the cylinder, the protrusion amount relative to the top surface of the cylinder body is one of important technical parameters of the engine, which plays a decisive role in ensuring the overall running stability of the engine, so that the protrusion amount of the engine piston higher than the top surface of the cylinder body needs to be analyzed and measured in the research and development trial-production stage or the batch production stage.
Aiming at the emission standard of the six national automobiles, higher requirements are also put forward for the mechanical mechanism part of the engine, in order to further ensure that the thermal expansion coefficient of each cylinder is approximate and the combustion sufficiency is ensured when the cylinder corresponds to the combustion chamber, the height of the piston sliding in the piston cylinder of the engine and the height of the piston protruding out of the cylinder body of the engine directly influence the combustion space in the combustion chamber and the combustion sufficiency, the protruding height of the detection piston of the existing engine assembly production line is detected, when in measurement, a measurer adjusts the position of the detection body through an operating handle to enable the piston to be arranged in a cylindrical hole of the detection body, at the moment, a measuring button on the operating handle is pressed down, a switch controlled by the measuring button is opened, compressed air provided by a reversing valve on an air source is conveyed into a guide hole through an air pipe, and a conductive measuring scale is pushed, slide in the guiding hole of slide sensitive resistance gauge block, to the direction removal of the end that awaits measuring that is close to the piston, when electrically conductive dipperstick slides in the guiding hole on slide sensitive resistance gauge block, can arouse the change of resistance, also the displacement volume of measuring the bulb converts into the resistance value, the displacement volume of the action of measuring the ball is fed back out through electrically conductive dipperstick, stop motion when measuring the bulb and contacting with the piston top surface, simultaneously with displacement information the numerical value of measurement this moment promptly, transmit to display module on by the output line, convert the protrusion volume back of piston into, show through the display screen.
Resistance variation volume of slide sensitive resistor can change along with the change of temperature, make the degree of accuracy of the protrusion volume of surveying the piston lower, return spring drives and measures the bulb and reset, because return spring's long-time use, the spring can warp, elasticity changes, make electrically conductive dipperstick can't reset, the resistance variation volume that leads to resistance has the error, the rate of accuracy that detects is lower, when detecting, need rotate the bent axle, current mode of rotating the bent axle, be through artifical with the rotatory driving motor counterpoint of driving crankshaft at the tip of bent axle, its process counterpoints the efficiency bottom, when rotating the bent axle, engine cylinder can take place to vibrate, lead to detecting data and beat unstably.
Disclosure of Invention
The present invention is directed to a device and a method for detecting a protruding height of an engine piston, so as to solve the problems mentioned in the background art.
The technical scheme of the invention is as follows: the utility model provides a detect detection device of engine piston salient height, includes transmission line and controller, detection device is including putting moving mechanism, detection mechanism at the transmission line side, being used for driving rotatory rotary mechanism and the stop device of bent axle, moving mechanism is including horizontal drive electric jar and support frame, detection mechanism installs on the horizontal drive electric jar, rotary mechanism installs the one end at the carriage in the direction of transfer of transmission line, stop device sets up the stop mechanism in the transmission line both sides including two symmetries, detection mechanism installs the displacement sensor on detecting the flat board including detecting dull and stereotyped lift cylinder and a plurality of that is used for the drive to detect dull and stereotyped lift, detect the output at lift cylinder of dull and stereotyped installation, all displacement sensors all with controller electric connection, rotary mechanism is including the rotatory rotating assembly of drive bent axle and the counterpoint subassembly that is used for driving rotating assembly and bent axle counterpoint And the rotating assembly is arranged on the aligning assembly.
Preferably, be provided with vertical slide on the horizontal drive electric cylinder, the lift cylinder is vertical down and install on vertical slide through the mounting bracket, the output of lift cylinder is provided with the elevating platform, install vertical buffer down on the elevating platform, detect the dull and stereotyped output of installing at the buffer.
Preferably, the rotating assembly comprises a servo motor, a speed reducer in transmission fit with an output shaft of the servo motor, and a clamping sleeve head, wherein an insertion hole is formed in the end face of the output shaft of the speed reducer along the axis of the end face, the clamping sleeve head is provided with an insertion shaft in insertion fit with the insertion hole, a buffer spring is sleeved on the insertion shaft, a plurality of sliding grooves distributed in an equal angle difference mode are formed in the cylindrical surface of the insertion shaft along the axis of the insertion shaft, a sliding rail in sliding fit with the sliding grooves is arranged on the inner side of the insertion hole, an alignment groove is formed in one side, facing the crankshaft, of the clamping sleeve head, a plurality of clamping grooves are formed in the inner side of the alignment groove, and all the clamping grooves are distributed in an equal angle difference mode around.
Preferably, the counterpoint subassembly is including the slide of horizontal installation at the support frame side and drive actuating cylinder, the length direction of the central line horizontal perpendicular to transmission line of slide, sliding fit has the slip table on the slide, the drive direction who drives actuating cylinder is parallel with the central line of slide, the output fixed mounting who drives actuating cylinder is on the slip table, install vertical drive electric jar on the slip table, the drive direction of vertical drive electric jar is parallel with the direction of transfer of transmission line, the rotating assembly transmission is installed on vertical drive electric jar.
Preferably, the bottom of the detection flat plate is of a U-shaped structure, and the detection ends of all the displacement sensors are downwards arranged on the inner side of the bottom of the detection flat plate.
Preferably, stop gear is including the output shaft level towards the drive pneumatic cylinder of transmission line, install push plate and a plurality of ejector pin on the drive pneumatic cylinder output, the direction of delivery of the equal horizontal perpendicular to transmission line of all ejector pins, and all ejector pins are all installed on the push plate.
Preferably, the buffer comprises a cylinder and a buffer shaft in plug-in fit with the cylinder, a return spring sleeved on the buffer shaft is arranged in the cylinder, and a clamping block is arranged at the bottom of the buffer shaft, which is located at the return spring.
Preferably, the vertical sliding plate is provided with a vertical sliding rail for the lifting platform to slide, the bottom end of the vertical sliding rail is horizontally provided with a limiting cylinder, an output shaft of the limiting cylinder is provided with a limiting block, and the bottom of the limiting block is provided with a limiting baffle.
Preferably, horizontal drive electric jar and vertical drive electric jar all are provided with a plurality of proximity sensor along self drive direction, and all proximity sensors all are connected with controller electric connection, horizontal drive electric jar, vertical drive electric jar and servo motor all with controller electric connection.
Preferably, the detection method of the detection device for detecting the protruding height of the engine piston comprises the following steps:
a limiting step: the transmission line transmits the engine to the position right below the detection mechanism, and the controller controls output shafts of all the driving hydraulic cylinders to extend out to drive all the push rods to abut against the engine cylinder body so as to limit the engine;
rotating the crankshaft: the controller controls an output shaft of the driving cylinder to retract, drives the rotating assembly to move right ahead of the crankshaft in the conveying direction of the conveying line, longitudinally drives the electric cylinder to drive the rotating assembly to move towards the crankshaft, so that the clamping sleeve head is sleeved on the crankshaft, the servo motor rotates to drive the clamping sleeve head to rotate, and after a clamping block at the end part of the crankshaft is aligned to the clamping groove, the crankshaft rotates along with the clamping sleeve head;
a detection step: the controller controls the horizontal driving electric cylinder and the lifting cylinder to sequentially drive the detection flat plate to press each piston hole of the engine cylinder body, when the crankshaft rotates, the piston extends upwards in the piston hole of the cylinder body, the displacement sensor on the detection flat plate detects the height of the piston extending out of the piston hole and converts the height into a digital signal to the controller, and the detection steps are repeated.
The invention provides a detection device for detecting the protruding height of an engine piston and a detection method thereof through improvement, compared with the prior art, the detection device has the following improvements and advantages:
one is as follows: the piston protrusion height is detected through the displacement sensor, so that the detection precision of the protrusion amount of the piston of the engine, which is higher than the top surface of the cylinder body, is improved, the detection error is reduced, the integral operation stability of the engine is ensured, and the approximation of the thermal expansion coefficient and the combustion sufficiency in the combustion chamber corresponding to each cylinder are ensured so as to reach the national six standards;
the second step is as follows: the crankshaft can be automatically aligned and driven to rotate through the rotating mechanism, the efficiency of driving the crankshaft to rotate is improved, and manual operation steps are reduced;
and thirdly: the engine cylinder body which is detecting the protrusion height of the piston can be positioned through the limiting device, the vibration amplitude of the engine cylinder body is reduced, the error of detection data is reduced, and the stability of the detection data is improved.
Drawings
The invention is further explained below with reference to the figures and examples:
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic view of the structural assembly of the detection mechanism and the moving mechanism of the present invention;
FIG. 3 is a first schematic view of the structural assembly of the detecting mechanism, the moving mechanism and the rotating mechanism of the present invention;
FIG. 4 is an enlarged schematic view at A of FIG. 3;
FIG. 5 is a schematic view of the structural assembly of the detecting mechanism, the moving mechanism and the rotating mechanism of the present invention;
FIG. 6 is a schematic perspective view of the detection mechanism of the present invention;
FIG. 7 is a schematic perspective view of a spacing mechanism of the present invention;
fig. 8 is a schematic perspective view of the first rotary mechanism of the present invention;
FIG. 9 is a schematic perspective view of a second embodiment of the rotary mechanism of the present invention;
FIG. 10 is a schematic perspective view of a damper according to the present invention;
description of reference numerals:
the device comprises a moving mechanism 1, a horizontal driving electric cylinder 1a, a supporting frame 1b, a vertical sliding plate 1c, a vertical sliding rail 1c1, a limiting cylinder 1c2, a limiting baffle 1c3, a limiting block 1c4, an elevating platform 1d, a buffer 1e, a buffering shaft 1e1, a return spring 1e2, a clamping block 1e3, a cylinder 1e4, a detection mechanism 2, a detection flat plate 2a, an elevating cylinder 2b, a displacement sensor 2c, a rotating mechanism 3, a rotating assembly 3a, a speed reducer 3a1, a clamping sleeve head 3a2, a plug-in hole 3a3, a plug-in shaft 3a4, a buffering spring 3a5, a sliding chute 3a6, a sliding rail 3a7, an alignment groove 3a8, a clamping groove 3a9, an alignment assembly 3b, a sliding rail 3b1, a driving cylinder 3b2, a sliding table 3b3, a longitudinal driving electric cylinder 3b4, a limiting device 4, a driving hydraulic cylinder 41, a pushing plate 43, a pushing plate 42 and a proximity.
Detailed Description
The present invention is described in detail below, and technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a detection device for detecting the protruding height of an engine piston by improvement, as shown in figures 1-10, the detection device comprises a transmission line and a controller, the detection device comprises a moving mechanism 1 arranged at the side of the transmission line, a detection mechanism 2, a rotating mechanism 3 for driving a crankshaft to rotate and a limiting device 4, the moving mechanism 1 comprises a horizontal driving electric cylinder 1a and a supporting frame 1b, the detection mechanism 2 is arranged on the horizontal driving electric cylinder 1a, the rotating mechanism 3 is arranged at one end of the supporting frame 1b in the transmission direction of the transmission line, the limiting device 4 comprises two limiting mechanisms symmetrically arranged at the two sides of the transmission line, the detection mechanism 2 comprises a detection flat plate 2a, a lifting cylinder 2b for driving the detection flat plate 2a to lift and a plurality of displacement sensors 2c arranged on the detection flat plate 2a, detect dull and stereotyped 2a and install the output at lift cylinder 2b, all displacement sensor 2c all with controller electric connection, rotary mechanism 3 is including rotatory rotating assembly 3a of drive crankshaft and the contraposition subassembly 3b that is used for drive rotating assembly 3a and bent axle counterpoint, rotating assembly 3a is installed on contraposition subassembly 3b, displacement sensor 2c is electric eddy current displacement sensor 2c, electric eddy current displacement sensor 2c is prior art and the model is HZ891 XL.
The principle of the eddy current displacement sensor 2c is to accurately measure the relative position between the measured body (which must be a metal conductor) and the end face of the probe by the principle of the eddy current effect, and the eddy current displacement sensor is characterized by good long-term working reliability, high sensitivity, strong anti-interference capability, non-contact measurement, fast response speed, no influence of oil, water and other media, and is often used for long-term real-time monitoring of parameters of large-scale rotating machinery, such as shaft displacement, shaft vibration, shaft rotation speed and the like.
When the distance between the metal to be measured and the probe is changed, the oscillation voltage changing along with the distance is converted into voltage and current changes through the processes of detection, filtering, linear compensation and amplification normalization, and finally the mechanical displacement (gap) is converted into voltage and current.
High-frequency oscillating current in a front-end device in the eddy current displacement sensor 2c system flows into a probe coil through an extension cable, and an alternating magnetic field is generated in a coil at the head of the probe. When the measured metal body is close to the magnetic field, an induced current is generated on the metal surface, and simultaneously the eddy current field also generates an alternating magnetic field with the direction opposite to the direction of the head coil, the amplitude and the phase of the high-frequency current of the head coil are changed by the reaction of the induced current and the alternating magnetic field, the effective impedance of the coil is changed, the change of the impedance Z of the coil, namely the change of the distance between the head body coil and the metal conductor, is converted into the change of voltage or current through the processing of an electronic circuit of a front-end device, the size of an output signal is changed along with the distance between a probe and the surface of the measured body, and the eddy current displacement sensor 2c realizes the measurement of parameters such as displacement, vibration and the like of the metal body according.
The controller (not shown) is a programmable logic controller (model number SIMATICS 7-400), which is a digital operation controller with microprocessor for automatic control and can load the control instructions into the memory for storage and execution at any time.
Be provided with vertical slide 1c on the horizontal drive electricity jar 1a, lift cylinder 2b is vertical down and install on vertical slide 1c through the mounting bracket, lift cylinder 2 b's output is provided with elevating platform 1d, install vertical buffer 1e down on the elevating platform 1d, detect dull and stereotyped 2a and install the output at buffer 1e, move to the piston hole of engine cylinder body directly over when vertical slide 1c of horizontal drive electricity jar 1a drive, lift cylinder 2b drive detects dull and stereotyped 2a and descends to pressing at the top of piston hole for all fin sensors move directly over the piston hole, and buffer 1e can guarantee to detect dull and stereotyped 2a and laminate the top in the cylinder body piston hole all the time.
The rotating assembly 3a comprises a speed reducer 3a1 and a clamping sleeve head 3a2 which are not shown in the figure and are in transmission fit with an output shaft of a servo motor, an insertion hole 3a3 is formed in the end face of the output shaft of the speed reducer 3a1 along the axis of the end face, the clamping sleeve head 3a2 is provided with an insertion shaft 3a4 in insertion fit with the insertion hole 3a3, a buffer spring 3a5 is sleeved on the insertion shaft 3a4, the insertion shaft 3a4 is provided with a plurality of sliding grooves 3a6 which are distributed at equal angular difference on the cylindrical surface of the insertion shaft along the axis of the insertion shaft, a sliding rail 3a7 in sliding fit with the sliding grooves 3a6 is arranged on the inner side of the insertion hole 3a3, an alignment groove 3a8 is arranged on one side of the crankshaft of the clamping sleeve head 3a2, a9 is arranged on the inner side of the alignment groove 3a8, all the clamping grooves 3a9 are distributed at equal angular difference around the insertion axis of the insertion shaft 3a4, and are attached to a flat plate after detection, counterpoint subassembly 3b overlaps joint cover 3a2 on the bent axle with the joint, be provided with the joint on the terminal surface of bent axle, buffer spring 3a5 makes joint cover 3a2 overlap all the time on the bent axle, servo motor drives the output shaft of speed reducer 3a1 and rotates, after in joint counterpoint to joint groove 3a9, the bent axle can rotate along with plug shaft 3a4 is rotatory, the piston can intermittent type nature protrusion piston hole, in order to detect the highest height that dull and stereotyped 2a detected the piston protrusion piston hole conveniently.
The alignment assembly 3b comprises a slide way 3b1 and a driving cylinder 3b2 horizontally installed on the side of the support frame 1b, the central line of the slide way 3b1 is horizontally perpendicular to the length direction of the conveying line, the slide way 3b1 is slidably matched with a sliding table 3b3, the driving direction of the driving cylinder 3b2 is parallel to the central line of the slide way 3b1, the output end of the driving cylinder 3b2 is fixedly installed on the sliding table 3b3, a longitudinal driving electric cylinder 3b4 is installed on the sliding table 3b3, the driving direction of the longitudinal driving electric cylinder 3b4 is parallel to the conveying direction of the conveying line, the rotating assembly 3a is installed on the longitudinal driving electric cylinder 3b4 in a transmission manner, the output shaft of the driving electric cylinder retracts to drive the sliding table 3b3 to move to the front of the crankshaft, then the longitudinal driving electric cylinder 3b4 drives the rotating assembly 3a to move towards the crankshaft, so that the clamping sleeve head 3a2 is sleeved, the buffer spring 3a5 compresses for a certain distance, the plug shaft 3a4 slides in the plug hole 3a3, and after the clamping head of the crankshaft is aligned to the clamping groove 3a9, the buffer spring 3a5 resets to enable the clamping sleeve head 3a2 to enter the clamping groove 3a9, and then the crankshaft rotates along with the rotation of the speed reducer 3a1 and the servo motor.
The bottom of the detection flat plate 2a is of a U-shaped structure, the detection ends of all the displacement sensors 2c are arranged on the inner side of the bottom of the detection flat plate 2a in an output-downward mode, and all the displacement sensors 2c point to the end face of the piston in the piston hole.
The limiting mechanism comprises a driving hydraulic cylinder 41 with an output shaft horizontally facing a transmission line, a push plate 42 and a plurality of push rods 43, wherein the push plate 42 and the push rods 43 are installed at the output end of the driving hydraulic cylinder 41, all the push rods 43 are horizontally perpendicular to the transmission line, all the push rods 43 are installed on the push plate 42, when the transmission line conveys all engine cylinder bodies to the position under the horizontal driving electric cylinder 1a, all the push rods 43 driven by the driving hydraulic cylinder 41 push the engine cylinder bodies, the engine cylinder bodies with the piston protruding heights being detected can be positioned, the vibration amplitude of the engine cylinder bodies is reduced, the detection data errors are reduced, and the stability of the detection data is improved.
Buffer 1e is including drum 1e4 and with drum 1e4 grafting complex buffering axle 1e1, be provided with in the drum 1e4 and cup joint reset spring 1e2 on buffering axle 1e1, buffering axle 1e1 is located the bottom of reset spring 1e2 and is provided with joint piece 1e3, presses on the piston hole of cylinder body when detecting flat 2a, and buffering axle 1e1 upwards compresses reset spring 1e2, can guarantee through the restoring force of reset spring 1e2 that detection flat 2a can press on the piston hole.
Be provided with on vertical slide 1c and supply the gliding vertical slide rail 1c1 of elevating platform 1d, the bottom horizontal installation of vertical slide rail 1c1 has spacing cylinder 1c2, and spacing cylinder 1c 2's output shaft is provided with stopper 1c4, stopper 1c 4's bottom is provided with limit baffle 1c3, and elevating platform 1d and vertical slide rail 1c1 sliding fit can guarantee that elevating platform 1d stably goes up and down and can not rock.
Horizontal drive electric cylinder 1a and vertical drive electric cylinder 3b4 all are provided with a plurality of proximity sensor 5 along self drive direction, and all proximity sensors 5 all are connected with controller electric connection, horizontal drive electric cylinder 1a, vertical drive electric cylinder 3b4 and servo motor all with controller electric connection, proximity sensor 5's model is the TL-Q5MC1 of NPN type.
The working principle is as follows:
step S1: the conveyor line, which conveys the motor directly below the detection means 2, is equipped with proximity sensors 5 at each station, when the proximity sensor 5 of the detection station detects that the engine block moves to a position right below the detection device, an electric signal X1 is transmitted to the controller, the controller outputs a signal Y1 to the horizontal driving electric cylinder 1a, the horizontal driving electric cylinder 1a is started, the proximity sensor 5 on the horizontal driving electric cylinder 1a detects that the driving detection mechanism 2 moves to the position right above the piston hole of the engine cylinder body, an electric signal X1 is sent to the controller, the controller outputs a signal Y1 to the horizontal driving electric cylinder 1a, the horizontal driving electric cylinder 1a is stopped, then the controller outputs a signal Y2 to a reversing valve on an air source of the lifting cylinder 2b, an output shaft of the lifting cylinder 2b extends out, the lifting table 1d descends, and the detection flat plate 2a is pressed on the top of the piston hole;
step S2: the controller outputs a signal Y3 to control all the driving hydraulic cylinders 41, output shafts of all the driving hydraulic cylinders 41 extend out to drive all the ejector rods 43 to abut against the engine cylinder body to position the engine, and the engine cylinder body which is detecting the projection height of the piston can be positioned through the limiting device 4, so that the vibration amplitude of the engine cylinder body is reduced, the error of detection data is reduced, and the stability of the detection data is improved;
step S3: the controller outputs a signal Y4 to a reversing valve on an air source of a driving cylinder 3b2, an output shaft of the driving cylinder 3b2 retracts to drive a sliding table 3b3 to slide on a sliding way 3b1, so that a rotating assembly 3a moves to the position right ahead of a crankshaft in the conveying direction of a conveying line, the controller outputs a signal Y5 to a longitudinal driving electric cylinder 3b4 to drive the rotating assembly 3a to move towards the crankshaft, a clamping sleeve head 3a2 is sleeved on the crankshaft, then the controller outputs a signal Y6 to a servo motor to rotate to drive a clamping sleeve head 3a2 to rotate, and after a clamping block 1e3 at the end part of the crankshaft is aligned to a clamping groove 3a9, the crankshaft rotates along with the clamping sleeve head 3a 2;
step S4: the displacement sensor 2c detects the piston protrusion height and transmits data to the controller, the controller outputs a signal Y7 to a reversing valve on an air source of the lifting cylinder 2b, the lifting cylinder 2b drives the detection panel 2a to ascend and reset, the controller simultaneously outputs a signal Y7 to the horizontal driving electric cylinder 1a, the horizontal driving electric cylinder 1a drives the detection mechanism 2 to move to the position right above an adjacent piston hole, when the corresponding proximity sensor 5 detects that the engine cylinder body moves to the position right below the detection device, an electric signal X2 is transmitted to the controller, the controller outputs a signal Y1 to the horizontal driving electric cylinder 1a again, the horizontal driving electric cylinder 1a stops, then the controller outputs a signal Y2 to the reversing valve on the air source of the lifting cylinder 2b, the output shaft of the lifting cylinder 2b extends out, the lifting table 1d descends, the detection panel 2a is pressed on the top of the piston hole to detect the piston protrusion height in a second piston hole, step S4 is repeated, and after the detection is completed, the detection mechanism 2, the movement mechanism 1, and the rotation mechanism 3 are reset.
A detection method of a detection device for detecting the protruding height of an engine piston comprises the following steps:
a limiting step: the transmission line transmits the engine to the position right below the detection mechanism 2, and the controller controls the output shafts of all the driving hydraulic cylinders 41 to extend out, so as to drive all the push rods 43 to abut against the engine cylinder body and limit the engine;
rotating the crankshaft: the controller controls the output shaft of the driving cylinder 3b2 to retract, drives the rotating component 3a to move to the right front of the crankshaft in the transmission direction of the transmission line, and drives the electric cylinder 3b4 to drive the rotating component 3a to move towards the crankshaft, so that the clamping sleeve head 3a2 is sleeved on the crankshaft, the servo motor rotates to drive the clamping sleeve head 3a2 to rotate, and after the clamping block 1e3 at the end part of the crankshaft is aligned to the clamping groove 3a9, the crankshaft rotates along with the clamping sleeve head 3a 2;
a detection step: the controller controls the horizontal driving electric cylinder 1a and the lifting cylinder 2b to sequentially drive the detection flat plate 2a to press each piston hole of the engine cylinder body, when the crankshaft rotates, the piston extends upwards in the piston hole of the cylinder body, the displacement sensor 2c on the detection flat plate 2a detects the height of the piston extending out of the piston hole and converts the height into a digital signal to the controller, and the detection steps are repeated.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a detection device for detect engine piston protrusion height, includes conveyer line and controller, its characterized in that: the detection device comprises a moving mechanism (1) arranged beside a transmission line, a detection mechanism (2), a rotating mechanism (3) used for driving a crankshaft to rotate and a limiting device (4), wherein the moving mechanism (1) comprises a horizontal driving electric cylinder (1a) and a supporting frame (1b), the detection mechanism (2) is arranged on the horizontal driving electric cylinder (1a), the rotating mechanism (3) is arranged at one end of the supporting frame (1b) in the transmission direction of the transmission line, the limiting device (4) comprises two limiting mechanisms symmetrically arranged at two sides of the transmission line, the detection mechanism (2) comprises a detection flat plate (2a), a lifting cylinder (2b) used for driving the detection flat plate (2a) to lift and a plurality of displacement sensors (2c) arranged on the detection flat plate (2a), and the detection flat plate (2a) is arranged at the output end of the lifting cylinder (2b), all displacement sensors (2c) all with controller electric connection, rotary mechanism (3) including drive rotatory rotating assembly (3a) of bent axle and be used for driving contraposition subassembly (3b) of rotating assembly (3a) and bent axle counterpoint, rotating assembly (3a) are installed on contraposition subassembly (3 b).
2. A detecting device for detecting the protrusion height of an engine piston according to claim 1, wherein: be provided with vertical slide (1c) on horizontal drive electric cylinder (1a), lift cylinder (2b) is vertical down and install on vertical slide (1c) through the mounting bracket, the output of lift cylinder (2b) is provided with elevating platform (1d), install vertical buffer (1e) down on elevating platform (1d), detect dull and stereotyped (2a) and install the output at buffer (1 e).
3. A detecting device for detecting the protrusion height of an engine piston according to claim 1, wherein: the rotary component (3a) comprises a servo motor, a speed reducer (3a1) in transmission fit with an output shaft of the servo motor and a clamping sleeve head (3a2), an insertion hole (3a3) is formed in the end face of the output shaft of the speed reducer (3a1) along the axis of the end face, an insertion shaft (3a4) in insertion fit with the insertion hole (3a3) is arranged on the clamping sleeve head (3a2), a buffer spring (3a5) is sleeved on the insertion shaft (3a4), a plurality of sliding grooves (3a6) distributed at equal angle difference are formed in the cylindrical surface of the insertion shaft (3a4) along the axis of the insertion shaft, a sliding rail (3a7) in sliding fit with the sliding grooves (3a6) is arranged on the inner side of the clamping sleeve head (3a2) facing the crankshaft, a8 is arranged on the inner side of the clamping groove (3a8), all the clamping grooves (3a9) are distributed around the axis of the insertion shaft (3a4) in an equal angle difference mode.
4. A detecting device for detecting the protrusion height of an engine piston according to claim 1, wherein: counterpoint subassembly (3b) including horizontal installation at slide (3b1) and drive actuating cylinder (3b2) of support frame (1b) side, the length direction of the central line horizontal perpendicular to transmission line of slide (3b1), sliding fit has slip table (3b3) on slide (3b1), the drive direction of driving actuating cylinder (3b2) is parallel with the central line of slide (3b1), the output fixed mounting who drives actuating cylinder (3b2) is on slip table (3b3), install vertical drive electric jar (3b4) on slip table (3b3), the drive direction of vertical drive electric jar (3b4) is parallel with the direction of transfer of transmission line, rotating assembly (3a) transmission is installed on vertical drive electric jar (3b 4).
5. A detecting device for detecting the protrusion height of an engine piston according to claim 1, wherein: the bottom of the detection flat plate (2a) is of a U-shaped structure, and the detection ends of all the displacement sensors (2c) are downwards output to be arranged on the inner side of the bottom of the detection flat plate (2 a).
6. A detecting device for detecting the protrusion height of an engine piston according to claim 1, wherein: the limiting mechanism comprises a driving hydraulic cylinder (41) with an output shaft horizontally facing the conveying line, a pushing plate (42) and a plurality of pushing rods (43), wherein the pushing plate (42) and the pushing rods (43) are installed at the output end of the driving hydraulic cylinder (41), all the pushing rods (43) are horizontally perpendicular to the conveying direction of the conveying line, and all the pushing rods (43) are installed on the pushing plate (42).
7. A detecting device for detecting the protrusion height of an engine piston according to claim 2, wherein: buffer (1e) including drum (1e4) and with drum (1e4) grafting complex buffering axle (1e1), be provided with reset spring (1e2) of cup jointing on buffering axle (1e1) in drum (1e4), the bottom that buffering axle (1e1) are located reset spring (1e2) is provided with joint piece (1e 3).
8. A detecting device for detecting the protrusion height of an engine piston according to claim 2, wherein: be provided with on vertical slide (1c) and supply gliding vertical slide rail (1c1) of elevating platform (1d), the bottom horizontal installation of vertical slide rail (1c1) has spacing cylinder (1c2), and the output shaft of spacing cylinder (1c2) is provided with stopper (1c4), the bottom of stopper (1c4) is provided with limit baffle (1c 3).
9. The apparatus for detecting the protrusion height of the piston of an engine according to claim 4, wherein: horizontal drive electric cylinder (1a) and vertical drive electric cylinder (3b4) all are provided with a plurality of proximity sensor (5) along self direction of drive, and all proximity sensor (5) all with controller electric connection, horizontal drive electric cylinder (1a), vertical drive electric cylinder (3b4) and servo motor all with controller electric connection.
10. The method for detecting the protrusion height of the engine piston according to any one of claims 1 to 9, wherein: the method comprises the following steps:
a limiting step: the engine is conveyed to the position right below the detection mechanism (2) by the conveying line, the output shafts of all the driving hydraulic cylinders (41) are controlled by the controller to extend out, all the ejector push rods (43) are driven to abut against the engine cylinder body, and the engine is limited;
rotating the crankshaft: the controller controls an output shaft of the driving cylinder (3b2) to retract, the rotating assembly (3a) is driven to move to the position right ahead of the crankshaft in the conveying direction of the conveying line, the electric cylinder (3b4) is driven to drive the rotating assembly (3a) to move towards the crankshaft longitudinally, the clamping sleeve head (3a2) is sleeved on the crankshaft, the servo motor rotates to drive the clamping sleeve head (3a2) to rotate, and after the clamping block (1e3) at the end part of the crankshaft is aligned to the clamping groove (3a9), the crankshaft rotates along with the clamping sleeve head (3a 2);
a detection step: the controller controls the horizontal driving electric cylinder (1a) and the lifting cylinder (2b) to sequentially drive the detection flat plate (2a) to press each piston hole of the engine cylinder body, when the crankshaft rotates, the piston extends upwards in the piston hole of the cylinder body, the displacement sensor (2c) on the detection flat plate (2a) detects the height of the piston extending out of the piston hole and converts the height into a digital signal to be sent to the controller, and the detection steps are repeated.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114646255A (en) * | 2022-02-23 | 2022-06-21 | 四川大学 | Hub bearing spinning surface height array eddy current non-contact measuring probe |
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