CN114084574B

CN114084574B - Type identification structure of tray and workpiece and pairing judgment method

Info

Publication number: CN114084574B
Application number: CN202111196809.2A
Authority: CN
Inventors: 曾超峰; 刘志峰; 张鹏飞; 黎镇源
Original assignee: Guangdong Original Point Intelligent Technology Co Ltd
Current assignee: Guangdong Original Point Intelligent Technology Co Ltd
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2024-05-03
Anticipated expiration: 2040-05-27
Also published as: CN114084574A; CN111689123A; CN114084573A; CN111689123B

Abstract

The invention discloses a type identification structure and a pairing judgment method for a tray and a workpiece, wherein the type identification structure comprises a tray for bearing the workpiece, a first induction group and a second induction group; the first induction group is used for identifying the setting position of the identification module on the tray, and the second induction group is used for identifying the type of the workpiece. The type identification structure of the tray and the workpiece provided by the invention can intelligently judge whether the tray is matched with the workpiece or not, correct the matching error in time, avoid the situation of the matching error of the workpiece and the vehicle model during loading, and provide a classification basis for the unloading roller conveyor line by the tray identification result or the workpiece identification result on the other hand, so that the automation degree is high.

Description

Type identification structure of tray and workpiece and pairing judgment method

The application relates to a patent application with the patent application number of 202010460372.8, the application date of ' 2020 month and 27 days ', and the patent application with the name of ' lifting roller way conveying device and pairing judging method based on the device

Technical Field

The invention relates to the technical field of automobile crankshaft quality inspection equipment, in particular to a type identification structure and a pairing judgment method for a tray and a workpiece.

Background

The automobile crankshaft is an important part of an automobile engine, and the automobile crankshaft finished product just produced cannot be directly loaded because the quality inspection is not carried out yet, and the automobile crankshaft finished product is required to be subjected to appearance quality inspection through a quality inspection line and is sent to a loading position by a transportation trolley after being judged to be qualified.

The quality inspection line mainly comprises a feeding roller way conveying line, a quality inspection table and a discharging roller way conveying line. The loading roller way conveying line conveys the tray carrying the automobile crankshaft finished product to the quality inspection table for quality inspection, if the automobile crankshaft finished product is judged to be qualified, the tray carrying the qualified product can be conveyed to the unloading roller way conveying line for caching, and finally, the tray is conveyed to the loading position by the conveying trolley, and the empty tray generated after the loading is finished can be conveyed back to the quality inspection line by the conveying trolley.

In order to enable the quality inspection line to realize the mixed detection of two types or more than two types of automobile crankshafts, the quality inspection line needs to be modified towards an intelligent production direction. One type of automotive crankshaft corresponds to being transported by a pallet. After the automobile crankshafts of different types are qualified, information identification (such as type identification and whether the tray is placed in a correct posture) is needed to be carried out on the tray and the automobile crankshafts respectively, and a control system analyzes the information to enable a quality inspector to timely find the problems of wrong model pairing of the tray and the automobile crankshafts, wrong tray placement posture and the like; if the judgment is passed, the control system can convey the tray carrying the qualified products to a discharging roller way conveying line for classified caching according to the type information of the automobile crankshafts. In addition, the unloading roller way transfer chain includes upper and lower two-layer, and every layer all sets up roller way conveying mechanism, and the upper strata is used for classifying the buffering to the conforming article, and the lower floor is used for classifying the buffering to empty tray, and the working face of quality inspection platform is then being less than the upper level of unloading roller way transfer chain, and the tray that carries the conforming article needs to be carried to the upper strata of unloading roller way transfer chain through lifting action. Therefore, based on the above production requirements, there is a need to develop a lifting roller conveyor device capable of connecting a quality inspection table and a discharging roller conveyor line.

It can be seen that there is a need for improvements and improvements in the art.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a type recognition structure and a pairing judgment method for a pallet and a workpiece having a pairing judgment function for a workpiece and a pallet, so as to solve at least one technical problem as described above.

In order to achieve the above purpose, the invention adopts the following technical scheme:

A type identification structure of a tray and a workpiece comprises a tray for bearing the workpiece, a first induction group and a second induction group; each tray is provided with an identification module arranged at a preset position, a first induction group is used for identifying the arrangement position of the identification module on the tray, and a second induction group is used for identifying the type of the workpiece; the tray comprises a first tray and a second tray, a first identification module and a first bearing seat are arranged on the first tray, and a second identification module and a second bearing seat are arranged on the second tray; the first bearing seat is used for bearing a first workpiece, and the second bearing seat is used for bearing a second workpiece; the first induction group comprises a first inductor, a second inductor and a third inductor; the tray is provided with 4 corners, and the positions of the 4 corners are respectively set to be a left front part, a right front part, a left rear part and a right rear part; the first sensor is used for detecting whether an identification module is arranged on the right rear part of the tray or not; the second sensor is used for detecting whether an identification module is arranged on the left rear part of the tray; the third sensor is used for detecting whether an identification module is arranged on any part of the left front part and the right front part.

The first identification module is an identification lug arranged on the left rear part and the right rear part of the first tray, and the second identification module is an identification lug arranged on the right front part and the right rear part of the second tray.

The second induction group comprises a fourth inductor and a fifth inductor, a first distinguishing feature which is different from a second workpiece is arranged on the first workpiece, and a second distinguishing feature which is different from the first workpiece is arranged on the second workpiece; the fourth sensor is used for sensing whether the workpiece has the first distinguishing characteristic or not; the fifth sensor is used for sensing whether the workpiece has the second distinguishing characteristic.

The first induction group and the second induction group are electrically connected with a control module, the tray is conveyed to a detection station, the identification module on the tray enables part of the inductors in the first induction group to induce, the workpiece on the tray enables part of the inductors in the second induction group to induce, each inductor feeds back induction signals to the control module, and the control module generates a tray identification result and a workpiece identification result through analysis; the control module performs pairing judgment on the tray identification result and the workpiece identification result

If the tray is a first tray with correct placement posture in the tray identification result and the workpiece is a first workpiece in the workpiece identification result, the tray and the workpiece are correctly paired; if the tray is a second tray with correct placement posture in the tray identification result and the workpiece is a second workpiece in the workpiece identification result, the tray and the workpiece are correctly paired; if the tray is a first tray with correct placement posture in the tray identification result and the workpiece is a second workpiece in the workpiece identification result, the pairing of the tray and the workpiece is incorrect; if the tray is a second tray with correct placement posture in the tray identification result and the workpiece is a first workpiece in the workpiece identification result, the tray and the workpiece are incorrectly paired; if the tray is the tray with the reversed placement posture in the tray identification result, the pairing of the tray and the workpiece is incorrect.

Specifically, if the first sensor and the second sensor in the first sensing group can sense the recognition convex block and the third sensor can not sense the recognition convex block, the control module judges that the tray on the detection station is a first tray with correct placement posture;

If the third sensor in the first sensing group can sense the identification lug and the first sensor and the second sensor can not sense the identification lug, the control module judges that the tray on the detection station is a first tray with the opposite placement posture;

if the first sensor and the third sensor in the first sensing group can sense the identification lug and the second sensor can not sense the identification lug, the control module judges that the tray on the detection station is a second tray with correct placement posture;

If the second sensor and the third sensor in the first sensing group can sense the identification lug and the first sensor cannot sense the identification lug, the control module judges that the tray on the detection station is a second tray with the opposite placement posture;

If the fourth sensor in the second sensing group can sense the first distinguishing characteristic and the fifth sensor can not sense the second distinguishing characteristic, the control module judges that the workpiece on the detection station is a first workpiece;

if the fifth sensor in the second sensing group can sense the second distinguishing characteristic and the fourth sensor can not sense the first distinguishing characteristic, the control module judges that the workpiece on the detection station is the second workpiece.

The beneficial effects are that:

The invention provides a type identification structure of a tray and a workpiece, which is characterized in that the tray and the workpiece are respectively identified through a first induction group and a second induction group, on one hand, whether the tray is matched with the workpiece is intelligently judged, the matching error is timely corrected, the situation that the workpiece is matched with a vehicle model in the loading process is avoided, on the other hand, the tray identification result or the workpiece identification result also provides a classification basis for a blanking roller conveyor line, and the degree of automation is high. In addition, the lifting roller conveying device is provided with a lifting mechanism, so that the quality inspection table is connected with the upper layer of the blanking roller conveying line in height, and the flexibility is high.

Drawings

Fig. 1 is a perspective view of a lifting roller conveyor provided by the invention.

Fig. 2 is a partial enlarged view of the L region in fig. 1.

Fig. 3 is a perspective view of a pallet in the lifting roller conveyor device provided by the invention.

Fig. 4 is a top view of a first tray and a first workpiece in the lifting roller conveying device provided by the invention.

Fig. 5 is a top view of a second tray and a second workpiece in the lifting roller conveying device provided by the invention.

Fig. 6 is a top view showing that the first tray is placed in a correct posture in the lifting roller conveyor provided by the invention.

Fig. 7 is a top view of the lifting roller conveyor according to the present invention, showing the first tray in reverse.

Fig. 8 is a top view of the lifting roller conveyor device provided by the invention, wherein the second tray is placed in a correct posture.

Fig. 9 is a top view of the lifting roller conveyor according to the present invention, showing the second tray in reverse.

Fig. 10 is a front view of a lifting frame in a lifting state in the lifting roller conveying device provided by the invention.

Fig. 11 is a front view of a lifting frame in a descending state in the lifting roller conveying device provided by the invention.

Fig. 12 is a schematic transmission diagram of a driving motor and a guide roller in the lifting roller conveying device provided by the invention.

Detailed Description

The invention provides a type identification structure and a pairing judgment method for a tray and a workpiece, which are used for making the purposes, the technical scheme and the effects of the invention clearer and more definite, and the invention is further described in detail below by referring to the accompanying drawings and examples. It should be understood that the detailed description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 1-12, the present invention provides a lifting roller conveying device, in which the direction of conveying a tray by a roller conveying mechanism is set to be opposite to the direction of 'front', 'front' and 'rear'. The broken line in the figure indicates the detection light emitted from the sensor, and cannot be directly observed.

The lifting roller way conveying device comprises a lifting frame 1, a lifting mechanism 2 for lifting the lifting frame 1 and a roller way conveying mechanism 3 arranged on the lifting frame 1; the roller conveying mechanism 3 is used for conveying pallets; each tray is provided with an identification module arranged at a preset position, the roller conveying mechanism 3 is provided with a first induction group 4 and a second induction group 5, the first induction group 4 is used for identifying the setting position of the identification module on the tray, and the second induction group 5 is used for identifying the type of the workpiece. Here, be provided with control module in the quality control line, first response group 4 and second response group 5 all with control module electric connection, control module prefers to be the PLC controller.

The working flow of the finished automobile crankshaft product after quality inspection is briefly described as follows: the finished automobile crankshaft product is qualified after quality inspection and can be replaced on the tray as a qualified piece, the lifting mechanism 2 drives the lifting frame 1 and the roller conveying mechanism 3 to descend, the height of the bearing surface of the roller conveying mechanism 3 is consistent with that of the quality inspection table, a quality inspector pushes the tray carrying the qualified piece to a detection station (namely, the position where an inductor can normally detect the tray and a workpiece) of the roller conveying mechanism 3, the recognition module can enable part of inductors of the first induction group 4 to generate induction signals, the other part of inductors cannot generate induction signals, at the moment, the control module can acquire the induction signals of the first induction group 4, and the control module 5 obtains tray recognition results after analysis. Assuming that N kinds of trays are provided, N kinds of detection results will appear correspondingly if the setting positions of the identification modules on each kind of tray are different, and the N kinds of detection results are different; in addition, the tray has the correct placement posture or opposite placement posture, so that a total of 2N detection results can appear by increasing the detection results of the opposite placement, and the 2N detection results are different. Therefore, since each tray identification result is unique, the control module can not only determine the type of tray according to the tray identification result, but also detect whether the tray is reversely placed.

Similarly, the workpiece can make part of the inductors of the second induction group 5 generate induction signals, and the other part of the inductors cannot generate induction signals, so that the control module can acquire the induction signals of the second induction group 5; the control module obtains a workpiece detection result after analysis, and the model of the workpiece can be obtained from the workpiece detection result. Since each type of workpiece is to be placed on a pallet that exclusively carries the type of workpiece, in the case where the pallet is provided with N kinds, the workpieces are correspondingly provided with N kinds. It should be noted that if all the sensors in the second sensing set 5 do not generate sensing signals, it means that no workpiece is placed on the tray.

The control module continuously judges whether the tray and the workpiece are matched correctly or not, and compares the tray identification result with the workpiece detection result: (1) If the tray placement posture is correct and the type of the tray is matched with the type of the workpiece, the tray and the workpiece are considered to be paired correctly; (2) If the placing posture of the tray is correct but the type of the tray and the type of the workpiece are not matched, the tray and the workpiece are considered to be incorrectly paired; (3) If the placing posture of the tray is reversed, whether the type of the tray is matched with the type of the workpiece or not, the tray and the workpiece are considered to be incorrectly paired. When the pairing of the tray and the workpiece is incorrect, the quality inspector pulls the tray carrying the qualified product back to the quality inspection table, and the tray placing posture is put in the correct position or the tray paired with the workpiece model is replaced according to the comparison result. When the pallet and the workpiece are matched correctly, the lifting mechanism 2 drives the lifting frame 1 and the roller conveying mechanism 3 to ascend, so that the bearing surface of the roller conveying mechanism 3 is consistent with the bearing surface of the upper layer of the blanking roller conveying line, then the roller conveying mechanism 3 conveys the pallet carrying qualified products to the blanking roller conveying line, and finally the control module carries out classified buffering according to the pallet identification result or the workpiece identification result.

The unqualified workpieces are changed into qualified workpieces after overhauling, the qualified workpieces are placed on the trays, then the trays carrying the qualified workpieces are conveyed to the lifting roller conveying device for identification and comparison according to the working flow, and if the trays are matched with the workpieces correctly, the control module controls the lifting roller conveying device to convey the trays carrying the qualified workpieces to the blanking roller conveying line for classified caching.

Therefore, the lifting roller conveying device provided by the invention can respectively identify the tray and the workpiece through the first induction group 4 and the second induction group 5, on one hand, whether the tray is matched with the workpiece is intelligently judged, the matching error is timely corrected, the situation that the workpiece is matched with a vehicle model in the loading process is avoided, and on the other hand, the tray identification result or the workpiece identification result also provides a classification basis for the blanking roller conveying line, so that the degree of automation is high. In addition, the lifting roller conveying device is provided with the lifting mechanism 2, so that the quality inspection table is connected with the upper layer of the blanking roller conveying line in height, and the flexibility is high.

In this embodiment, as shown in fig. 4 and 5, the present utility model provides a lifting roller conveying device designed to convey two types of workpieces, such as a crankshaft of a 2.0L engine and a crankshaft of a 2.5L engine, where the trays include a first tray 61 and a second tray 71, the first tray 61 is provided with a first identification module 62 and a first bearing seat 63, and the second tray 71 is provided with a second identification module 72 and a second bearing seat 73; the first carrier is used for carrying a first workpiece 64, and the second carrier is used for carrying a second workpiece 74; the first sensing group 4 includes a first sensor 41, a second sensor 42, and a third sensor 43. For ease of illustration, the crankshaft of a 2.0L engine is carried by the first tray 61 and the crankshaft of a 2.5L engine is carried by the second tray 71.

Specifically, as shown in fig. 3, the tray has 4 corners, and the positions of the 4 corners are respectively set as a left front part 8.1, a right front part 8.2, a left rear part 8.3 and a right rear part 8.4; the first sensor 41 is used for detecting whether an identification module is arranged on the right rear part 8.4 of the tray; the second sensor 42 is used for detecting whether an identification module is arranged on the left rear part 8.3 of the tray; the third sensor 43 is used to detect whether an identification module is provided at any part of the left front part 8.1 and the right front part 8.2. By the arrangement, the tray has reasonable and compact structure, and interference between the identification module and the crankshaft is avoided; and the detection mode is simple and reasonable, the sensor consumption is small, and the manufacturing cost is saved.

In a preferred embodiment, the first sensor 41, the second sensor 42, and the third sensor 43 are all correlation type photoelectric sensors, the correlation type photoelectric sensors include an emitter and a receiver, the detection light emitted by the third sensor 43 is parallel to the extending direction of the guide roller, in order to make the detection result more accurate, and prevent interference of other components, the detection light emitted by the first sensor 41 and the second sensor 42 are disposed in a crossing manner, but the detection light is not intersected. Through the arrangement, the work of each group of inductors is not interfered with each other, each inductor is arranged at the top of the mounting seat through the first sensor bracket, and the whole structure is relatively compact.

For a better illustration of the detection logic, the following list of 4 embodiments of the identification module on the tray:

Scheme 1: the first recognition module 62 is a recognition bump provided on the left and right rear portions 8.3 and 8.4 of the first tray 61, and the second recognition module 72 is a recognition bump provided on the right and front portions 8.4 and 8.2 of the second tray 71. The tray can obtain the following 4 detection results after being detected by the sensor: (1) the first tray 61 is placed in the correct posture: the first sensor 41 and the second sensor 42 can sense the identification bump (i.e. the first sensor 41 and the second sensor 42 have sensing signals output to the control module), and the third sensor 43 cannot sense the identification bump (i.e. the third sensor 43 does not have sensing signals output to the control module), as shown in fig. 6; (2) the first tray 61 is put in the opposite posture: the third sensor 43 can sense the identification bump, and the first sensor 41 and the second sensor 42 cannot sense the identification bump, as shown in fig. 7; (3) the second tray 71 is placed in the correct posture: the first sensor 41 and the third sensor 43 can sense the identification bump, and the second sensor 42 cannot sense the identification bump, as shown in fig. 8; (4) the placement posture of the second tray 71 is reversed: the second sensor 42 and the third sensor 43 can sense the identification bump, and the first sensor 41 cannot sense the identification bump, as shown in fig. 9.

Scheme 2: the first identification module 62 is an identification tab provided on the left front 8.1 and the right front 8.2 of the first tray 614 and the second identification module 72 is an identification tab provided on the right rear 8.4 and the right front 8.2 of the second tray 71. The tray can obtain the following 4 detection results after being detected by the sensor: (1) the first tray 61 is placed in the correct posture: the third sensor 43 can sense the identification bump (i.e., the third sensor 43 outputs a sensing signal to the control module), and the first sensor 41 and the second sensor 42 cannot sense the identification bump (i.e., the first sensor 41 and the second sensor 42 do not output a sensing signal to the control module); (2) the first tray 61 is put in the opposite posture: the first sensor 41 and the second sensor 42 can sense the identification bump, and the third sensor 43 cannot sense the identification bump; (3) the second tray 71 is placed in the correct posture: the first sensor 41 and the third sensor 43 can sense the identification bump, and the second sensor 42 cannot sense the identification bump; (4) the placement posture of the second tray 71 is reversed: the second sensor 42 and the third sensor 43 can sense the identification bump, and the first sensor 41 cannot sense the identification bump.

Scheme 3: the first recognition module 62 is a recognition bump provided on the left rear portion 8.3 and the right rear portion 8.4 of the first tray 61, and the second recognition module 72 is a recognition bump provided on the left rear portion 8.3 and the left front portion 8.1 of the second tray 71. The tray can obtain the following 4 detection results after being detected by the sensor: (1) the first tray 61 is placed in the correct posture: the first sensor 41 and the second sensor 42 can sense the identification bump (i.e. the first sensor 41 and the second sensor 42 have sensing signals output to the control module), and the third sensor 43 cannot sense the identification bump (i.e. the third sensor 43 does not have sensing signals output to the control module); (2) the first tray 61 is put in the opposite posture: the third sensor 43 can sense the identification bump, and the first sensor 41 and the second sensor 42 cannot sense the identification bump; (3) the second tray 71 is put in the opposite posture: the second sensor 42 and the third sensor 43 can sense the identification bump, and the first sensor 41 cannot sense the identification bump; (4) the second tray 71 is placed in the correct posture: the first sensor 41 and the third sensor 43 can sense the identification bump, and the second sensor 42 cannot sense the identification bump.

Scheme 4: the first identification module 62 is an identification bump provided on the left front 8.1 and the right front 8.2 of the first tray 61, and the second identification module 72 is an identification bump provided on the left rear 8.3 and the left front 8.1 of the second tray 71. The tray can obtain the following 4 detection results after being detected by the sensor: (1) the first tray 61 is placed in the correct posture: the third sensor 43 can sense the identification bump (i.e., the third sensor 43 outputs a sensing signal to the control module), and the first sensor 41 and the second sensor 42 cannot sense the identification bump (i.e., the first sensor 41 and the second sensor 42 do not output a sensing signal to the control module); (2) the first tray 61 is put in the opposite posture: the first sensor 41 and the second sensor 42 can sense the identification bump, and the third sensor 43 cannot sense the identification bump; (3) the second tray 71 is put in the opposite posture: the second sensor 42 and the third sensor 43 can sense the identification bump, and the first sensor 41 cannot sense the identification bump; (4) the second tray 71 is placed in the correct posture: the first sensor 41 and the third sensor 43 can sense the identification bump, and the second sensor 42 cannot sense the identification bump.

Specifically, as shown in fig. 4 and 5, the second sensing set 5 includes a fourth sensor 51 and a fifth sensor 52, the first workpiece 64 is provided with a first distinguishing feature 65 that is different from the second workpiece 74, and the second workpiece 74 is provided with a second distinguishing feature 75 that is different from the first workpiece 64; in the specific embodiment, the following steps are: the first workpiece 64 is a crankshaft of a 2.0L engine, the second workpiece 74 is a crankshaft of a 2.5L engine, the first distinguishing feature 65 is that the two crankshafts are unequal in length, the 2.0L engine is shorter than the 2.5L engine in length, and the crank arrangement positions of the two crankshafts are different in the axial direction; the second distinguishing feature 75 is that 2.5L of engine crankshafts are provided with toothed plates, while 2.0L of engine crankshafts are not provided with toothed plates. The fourth sensor 51 is configured to sense whether the workpiece has the first distinguishing characteristic 65; the fifth sensor 52 is used to sense whether the workpiece has the second distinguishing characteristic 75. It will be appreciated that if the workpiece is a 2.0L engine crankshaft, the fourth sensor 43 is capable of sensing a crank on the 2.0L engine crankshaft to generate a sensing signal, and the fifth sensor 51 is incapable of generating a sensing signal; if the workpiece is a 2.5L engine crankshaft, the fifth sensor 51 can sense that the fluted disc on the 2.5L engine crankshaft generates a sensing signal, and the fourth sensor 43 cannot generate a sensing signal.

The fourth inductor 51 and the fifth inductor 52 are correlation photoelectric sensors, the correlation photoelectric sensors comprise an emitter and a receiver, the detection light emitted by the fourth inductor 51 is vertical downwards, the emitter of the fourth inductor is arranged on the second sensor bracket 53 and is positioned above the middle part of the roller conveying mechanism, the receiver of the fourth inductor is arranged on the lifting frame 1, and the detection light emitted by the fourth inductor 51 does not interfere with the guide roller. The detection light emitted by the fifth sensor 52 is parallel to the extending direction of the guide roller, and the fifth sensor 52 is arranged at the top of the mounting seat through the third sensor bracket.

The identification contrast method based on the lifting roller way conveying device is that a tray is conveyed to a detection station, a recognition module on the tray enables partial inductors in a first induction group 4 to induce, workpieces on the tray enable partial inductors in a second induction group 5 to induce, each inductor feeds back induction signals to a control module, and the control module generates a tray recognition result and a workpiece recognition result through analysis; the control module compares the tray identification result with the workpiece identification result.

If the tray is the first tray 61 with correct placement posture in the tray recognition result, and the workpiece is the first workpiece 64 in the workpiece recognition result, the pairing of the tray and the workpiece is correct;

if the tray is the second tray 71 with correct placement posture in the tray recognition result, and the workpiece is the second workpiece 74 in the workpiece recognition result, the pairing of the tray and the workpiece is correct;

if the tray is the first tray 61 with correct placement posture in the tray recognition result and the workpiece is the second workpiece 74 in the workpiece recognition result, the pairing of the tray and the workpiece is incorrect;

if the tray is the second tray 71 with correct placement posture in the tray recognition result, and the workpiece is the first workpiece 64 in the workpiece recognition result, the pairing of the tray and the workpiece is incorrect;

If the tray is the tray with the reversed placement posture in the tray identification result, the pairing of the tray and the workpiece is incorrect.

Specifically, the tray identification logic in the above scheme 1 is adopted to set the tray:

if the first sensor 41 and the second sensor 42 in the first sensor group 4 can sense the identification bump and the third sensor 43 cannot sense the identification bump, the control module determines that the tray on the detection station is the first tray 61 with correct placement posture;

if the third sensor 43 in the first sensing set 4 can sense the identification bump and the first sensor 41 and the second sensor 42 cannot sense the identification bump, the control module determines that the tray on the detection station is the first tray 61 with the opposite placement posture;

If the first sensor 41 and the third sensor 43 in the first sensing set 4 can sense the identification bump and the second sensor 42 cannot sense the identification bump, the control module determines that the tray on the detection station is the second tray 71 with correct placement posture;

If the second sensor 42 and the third sensor 43 in the first sensor set 4 can sense the identification bump and the first sensor 41 cannot sense the identification bump, the control module determines that the tray on the detection station is the second tray 71 with the opposite placement posture.

If the fourth sensor 51 in the second sensing group 5 can sense the first distinguishing characteristic 65 and the fifth sensor 52 cannot sense the second distinguishing characteristic 75, the control module determines that the workpiece at the detection station is the first workpiece 64;

if the fifth sensor 52 in the second sensing set 5 is capable of sensing the second distinguishing characteristic 75 and the fourth sensor 51 is not capable of sensing the first distinguishing characteristic 65, the control module determines that the workpiece at the inspection station is the second workpiece 74.

In one embodiment, as shown in fig. 1 and 10, the lifting mechanism 2 includes a chassis 21 and a first cylinder 22 disposed vertically upwards, a cylinder body of the first cylinder 22 is fixedly connected with the chassis 21, and a piston rod end of the first cylinder 22 is connected with the lifting frame 1 through a connecting plate 23.

Preferably, as shown in fig. 10, two first guide rods 24 are disposed on the bottom surface of the connecting plate 23, and first sliding sleeves 25 corresponding to the guide rods are fixedly disposed on the bottom frame 21, and the two first guide rods 24 are slidably inserted into the first sliding sleeves 25 respectively. Through the guiding action of the first sliding sleeve 25 and the first guide rod 24, the correct movement direction of the lifting frame 1 can be ensured, and the piston rod of the first cylinder 22 can be prevented from being subjected to shearing force, so that the piston rod is prevented from being deformed due to the shearing force.

In one embodiment, as shown in fig. 11, the roller conveying mechanism 3 includes two mounting seats 31, a plurality of guide rollers 38 disposed between the two mounting seats 31, a driving motor 33, and a transmission mechanism; the transmission mechanism comprises a torsion limiter 34 arranged on the output end of a driving motor 33, a friction chain wheel 35 is arranged on the torsion limiter 34, a driving chain wheel (not visible in the figure) and a driven chain wheel 37 are arranged at the end part of each guide roller 38, the friction chain wheel 35 is in transmission connection with the driving chain wheel on one guide roller 38 through a first chain 36 (part of the chain is schematically shown in the figure), and the driven chain wheel 37 on one guide roller 38 is in transmission connection through a second chain 39. The torque limiter 34 comprises a coupling body, a driving friction plate, a driven friction plate, a disc spring and a locking end cover, wherein the driving friction plate, the driven friction plate, the disc spring and the locking end cover are arranged on the coupling body, the friction sprocket 35 is arranged between the driving friction plate and the driven friction plate, and the disc spring is used for compressing the driven friction plate so that the friction sprocket 35 rotates under the friction force provided by the driving friction plate and the driven friction plate. The compression amount of the belleville springs can be adjusted by locking the end cap, thereby functioning to adjust the torque preset value of the torque limiter 34. During manual operation, the hands of an operator are in danger of being involved in the gaps of the guide rollers 38, and as the output end of the driving motor 33 is connected with the friction sprocket 35 through the torsion limiter 34, when the external force received by the guide rollers 38 exceeds 75N, the transmission torque of the friction sprocket 35 and the torsion limiter 34 can be instantaneously increased and exceeds the preset sliding torque value of the torsion limiter 34, so that slipping occurs between the friction sprocket 35 and the torsion limiter 34, and the guide rollers 38 immediately stop moving, so that the purpose of safety protection of manual operation is achieved.

In one embodiment, as shown in fig. 3, the lifting roller conveying device further includes a first lifting thrust mechanism 91 and a second lifting thrust mechanism 92, the first lifting thrust mechanism 91 and the second lifting thrust mechanism are symmetrically arranged to form a detection station therebetween, and the first lifting thrust mechanism 91 and the second lifting thrust mechanism 92 each include a support plate 93 arranged on the lifting frame 1, a second cylinder 94 arranged on the support plate 93 vertically upwards, a connecting block 95 arranged at the end of a piston rod of the second cylinder 94, and thrust stoppers 96 respectively arranged at two ends of the connecting block 95. The first lifting and thrust mechanism 91 prevents the tray from retreating, and the second lifting and thrust mechanism 92 prevents the tray from being conveyed forward. It should be understood that, when the first lifting thrust mechanism 91 and the second lifting thrust mechanism 92 are working, the thrust device 96 extends out and is higher than the bearing surface of the roller conveying mechanism 3, and the connecting block 95 is not higher than the bearing surface of the roller conveying mechanism 3.

Specifically, as shown in fig. 3, the thrust block 96 includes a support 96.1, a thrust block 96.2 rotatably disposed on the support 96.1, a limiting groove 96.3 is formed in the support 96.1, the thrust block 96.2 is disposed in the limiting groove 96.3 through a pin shaft 96.4, a torsion spring 96.5 is disposed on the pin shaft 96.4, and the torsion spring 96.5 is used for pulling the thrust block 96.2 to make the thrust block 96.2 abut against the support 96.1.

Preferably, as shown in fig. 3, two second guide rods 96.6 are disposed on the bottom surface of the connecting block 95, and a second sliding sleeve 96.7 corresponding to the second guide rods 96.6 is fixedly disposed on the supporting plate 93, and the two guide rods are slidably inserted into the second sliding sleeve respectively. Through the guiding action of the second sliding sleeve 96.7 and the second guiding rod 96.6, the correct movement direction of the connecting block 95 plate can be ensured, and the piston rod of the second cylinder 94 can be prevented from being subjected to shearing force, so that the piston rod is prevented from being deformed due to the shearing force.

When the lifting frame 1 is pressed against the underframe 21 (i.e. when the piston rod of the first cylinder 22 is in a retracted state), the second cylinders 94 in the first lifting thrust mechanism 91 and the second lifting thrust mechanism 92 drive the connecting block 95 to lift, so that the thrust device 96 arranged on the connecting block 95 extends out and is higher than the bearing surface of the roller conveying mechanism 3. When the qualified product tray enters the detection station, the tray overcomes the elasticity of the torsion spring 96.5 and pushes the thrust block 96.2 on the first lifting thrust mechanism 91 to swing, so that the bottom surface of the tray presses the thrust block 96.2, the tray is smoothly conveyed forwards, after the tray passes through the first lifting thrust mechanism 91, the elasticity applied to the thrust block 96.2 by the torsion spring 96.5 pulls the thrust block 96.2, the thrust block 96.2 is pressed against the limiting groove 96.3, at the moment, the thrust block 96.2 is in a vertical state, and even if the tray pushes the thrust block 96.2 backwards, the thrust block 96.2 is limited to rotate by the support 96.1, so that the tray is prevented from continuously moving backwards, the tray which enters the upper roller conveying mechanism 3 and the lower roller conveying mechanism 3 can only move backwards, and the crankshaft is prevented from falling onto the ground due to the fact that the tray is separated from the roller conveying device.

To better constrain the pallet in the inspection station, the thrust 96 on the second lifting and thrust mechanism 92 blocks the pallet from further advancement, and when the pallet pushes the thrust 96.2, the thrust 96.2 is constrained from rotating by the abutment 96.1.

When the pairing of the workpiece and the tray is incorrect, the control module controls the thrust device 96 in the first lifting thrust mechanism 91 to descend, so that the quality inspector can pull the tray carrying the workpiece back to the quality inspection table, and the tray placing posture is aligned or the tray paired with the workpiece model is replaced correctly according to the comparison result.

Unqualified workpieces can become qualified parts after overhauling, the qualified parts need to be borne by empty trays, the empty trays are provided by the lower layer of the blanking roller conveying line, and after passing through the second lifting thrust mechanism 92, the thrust device 96 limits the empty trays to move backwards, so that the empty trays can only move unidirectionally.

The surface of each workpiece is stuck with a special bar code or two-dimensional code, when the workpiece can be sent to a blanking roller conveying line, the workpiece can be loaded, so that a camera code scanning device 14 is arranged on the roller conveying mechanism, and the camera code scanning device scans the workpiece to input the information of the workpiece into a control module.

Preferably, referring to fig. 1, guide strips 11 are disposed on the inner sides of the two mounting seats 31, and the guide strips 11 are fixedly connected with the mounting seats 31 through guide adjusting plates 12. The tray moves between the two guide bars 11, and the guide bars 11 guide the tray to keep a linear moving track, so that the tray deviation is prevented from affecting the placement accuracy of the crankshaft. In addition, the distance between the two guide strips 11 can be adjusted through the position of the guide adjusting plate 12, so that the motion guide precision of the tray can be better improved.

Preferably, as shown in fig. 10, the lifting roller conveyor further includes a fall protection device 10, where the fall protection device 10 includes a locking frame 10.1 fixedly disposed on the bottom frame 21, a jack 10.2 transversely disposed on the locking frame 10.1, and a safety latch 10.3 capable of being inserted into the jack 10.2, and the safety latch 10.3 is used for blocking the first guide rod 24 from falling. When the matching degree of the roller conveying device and the blanking roller conveying line is to be debugged and maintained in a lifting state, the safety bolt 10.3 is inserted into the jack 10.2, so that the problem that the lifting frame 1 suddenly falls out of control in the maintenance process to cause personnel injury can be avoided.

Preferably, the underframe 21 is also provided with a signal output switch 10.4 and a bolt bracket, after maintenance is completed, the safety bolt 10.3 is pulled out, the safety bolt 10.3 is inserted on the bolt bracket, the safety bolt 10.3 triggers the signal output switch 10.4, and the signal output switch 10.4 outputs a signal, so that the lifting roller conveyor can normally and automatically operate.

Preferably, the bottom of the supporting leg of the lifting frame 1 is provided with a cushion block 13, and by arranging the cushion block 13, the rigid collision between the lifting frame 1 and the underframe 21 is reduced.

It will be understood that equivalents and modifications will occur to those skilled in the art based on the present invention and its spirit, and all such modifications and substitutions are intended to be included within the scope of the present invention.

Claims

1. The type identification structure of the tray and the workpiece is characterized by comprising the tray for bearing the workpiece, a first induction group and a second induction group; each tray is provided with an identification module arranged at a preset position, a first induction group is used for identifying the arrangement position of the identification module on the tray, and a second induction group is used for identifying the type of the workpiece; the tray comprises a first tray and a second tray, a first identification module and a first bearing seat are arranged on the first tray, and a second identification module and a second bearing seat are arranged on the second tray; the first bearing seat is used for bearing a first workpiece, and the second bearing seat is used for bearing a second workpiece; the first induction group comprises a first inductor, a second inductor and a third inductor; the tray is provided with 4 corners, and the positions of the 4 corners are respectively set to be a left front part, a right front part, a left rear part and a right rear part; the first sensor is used for detecting whether an identification module is arranged on the right rear part of the tray or not; the second sensor is used for detecting whether an identification module is arranged on the left rear part of the tray; the third sensor is used for detecting whether an identification module is arranged on any part of the left front part and the right front part; the first identification module is an identification lug arranged on the left rear part and the right rear part of the first tray, and the second identification module is an identification lug arranged on the right front part and the right rear part of the second tray; the second induction group comprises a fourth inductor and a fifth inductor, a first distinguishing feature which is different from a second workpiece is arranged on the first workpiece, and a second distinguishing feature which is different from the first workpiece is arranged on the second workpiece; the fourth sensor is used for sensing whether the workpiece has the first distinguishing characteristic or not;

the fifth sensor is used for sensing whether the workpiece has the second distinguishing characteristic.

2. The pairing judgment method based on the type recognition structure of the tray and the workpiece according to claim 1, wherein the first induction group and the second induction group are electrically connected with a control module, the tray is conveyed to a detection station, the recognition module on the tray enables part of the inductors in the first induction group to induce, the workpiece on the tray enables part of the inductors in the second induction group to induce, each inductor feeds back induction signals to the control module, and the control module generates a tray recognition result and a workpiece recognition result through analysis; the control module performs pairing judgment on the tray identification result and the workpiece identification result;

if the tray is a first tray with correct placement posture in the tray identification result and the workpiece is a first workpiece in the workpiece identification result, the tray and the workpiece are correctly paired;

if the tray is a second tray with correct placement posture in the tray identification result and the workpiece is a second workpiece in the workpiece identification result, the tray and the workpiece are correctly paired;

if the tray is a first tray with correct placement posture in the tray identification result and the workpiece is a second workpiece in the workpiece identification result, the pairing of the tray and the workpiece is incorrect;

if the tray is a second tray with correct placement posture in the tray identification result and the workpiece is a first workpiece in the workpiece identification result, the tray and the workpiece are incorrectly paired;

If the tray is a tray with a reversed placement posture in the tray identification result, the pairing of the tray and the workpiece is incorrect;

If the first sensor and the second sensor in the first sensing group can sense the identification lug and the third sensor can not sense the identification lug, the control module judges that the tray on the detection station is a first tray with correct placement posture;