Limiting device and detection system

Abstract

The utility model relates to a limiting device and a detection system, the limiting device comprises a bottom supporting assembly, a fixed limiting assembly and a movable limiting assembly, the bottom supporting assembly comprises a supporting bottom plate and supporting vertical parts arranged on the supporting bottom plate in a scattered mode; the fixing and limiting assembly comprises a first fixing piece and a second fixing piece. The movable limiting assembly comprises a first movable piece and a second movable piece, the first movable piece comprises a first driving part and a first limiting part, the second movable piece comprises a second driving part and a second limiting part, the first movable piece and the second movable piece are arranged in two mutually perpendicular directions in the horizontal direction, limiting of the piece to be measured is achieved, manual alignment is not needed, and the measurement accuracy is improved. The device can improve the consistency of the clamping postures of the to-be-detected pieces during batch detection, facilitates the improvement of the measurement precision and the measurement efficiency, reduces the labor cost, and reduces the labor intensity.

Description

Technical Field

[0001] The utility model belongs to the technical field of detection equipment, and specifically relates to a limit device and a detection system. Background Art

[0002] The engine cylinder head is one of the important structural components of an internal combustion engine. The cylinder head is located on the upper part of the engine and covers the engine block. Its main function is to seal the engine block and ensure that the pressure in the cylinder does not leak. The cylinder head is often in contact with high-temperature and high-pressure combustion gas, and therefore bears a large thermal and mechanical load.

[0003] At present, the commonly used engine cylinder head quality inspection method relies on laser scanners, feeler gauges, knife-edge gauges, micrometers and other measuring tools. The above inspection methods are inefficient, have poor repeatability, high labor intensity, high labor participation costs, and poor inspection accuracy.

[0004] In addition, during the loading and unloading process of the existing automated inspection system, for irregular-shaped parts to be inspected, such as engine cylinder heads, the position error of the parts to be inspected placed on the corresponding measuring position of the measuring machine is large, resulting in poor accuracy of the inspection results, and even collision between the parts to be inspected and the inspection machine, causing damage to the parts to be inspected and the measuring machine. In addition, for parts to be inspected of different models with different shapes, their versatility is poor, and the mold needs to be redesigned, resulting in high inspection costs and low efficiency. Summary of the invention

[0005] The purpose of the utility model is to provide a limit device and a detection system to solve the problems existing in the prior art that the existing detection system has large positioning deviation of the detection position of the to-be-detected part, poor adjustability, resulting in low accuracy of the measurement result, and poor versatility for different models of to-be-detected parts with slightly different appearances.

[0006] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:

[0007] In one aspect, the utility model provides a limiting device, which includes:

[0008] A bottom support assembly, comprising a support bottom plate and support uprights dispersedly arranged on the support bottom plate;

[0009] A fixed limiting assembly, comprising a first fixing member and a second fixing member fixedly arranged on the supporting bottom plate;

[0010] A movable limiting assembly, which forms a detection position for placing a part to be detected with the bottom support assembly and the fixed limiting assembly, the movable limiting assembly includes a first movable part and a second movable part, the first movable part includes a first driving part and a first limiting part, the second movable part includes a second driving part and a second limiting part, the fixed ends of the first driving part and the second driving part are connected to the supporting bottom plate, the first limiting part is connected to the telescopic end of the first driving part, and can approach or move away from the first fixed part along a first direction, the second limiting part is connected to the telescopic end of the second driving part, and can approach or move away from the second fixed part along a second direction perpendicular to the first direction.

[0011] In some embodiments of the present application, a support member is provided on the support base plate, and the support member includes support vertical frames spaced apart on the support base plate and support horizontal frames connected between the support vertical frames, and the first fixing member and the second fixing member are provided on the support horizontal frames.

[0012] In some embodiments of the present application, the first fixing member and the first movable member are relatively arranged at two ends of the supporting beam along a first direction, the first limiting portion is fixed to the first driving portion through a first adapter plate, and a limiting end portion extending toward the first fixing member is formed on the first limiting portion.

[0013] In some embodiments of the present application, a threaded hole is formed on the end face of the first limiting portion close to the first fixing member, and the limiting end portion includes an adjusting screw, a limiting end head and a fastening bolt, the adjusting screw is connected in the threaded hole, the fastening bolt is connected to the outside of the adjusting screw for fixing the position of the adjusting screw relative to the first limiting portion, and the limiting end head is connected to one end of the adjusting screw close to the first fixing member.

[0014] In some embodiments of the present application, the front side of the limiting end is detachably connected to a movable end, an arc-shaped convex surface is formed on the movable end, an arc-shaped concave surface matching the arc-shaped convex surface is formed on the limiting end, and the movable end can rotate within a certain range relative to the limiting end.

[0015] In some embodiments of the present application, the telescopic end of the second driving part is connected to a second adapter plate, and the two ends of the second adapter plate are respectively connected to a second limiting part, and the end of the second limiting part is formed with a limiting protrusion extending upward, and the height of the second limiting part is smaller than the supporting vertical part, and the height of the limiting protrusion is greater than the supporting vertical part.

[0016] In some embodiments of the present application, the supporting upright portion includes a first supporting portion and a third supporting portion spaced apart from each other on the supporting bottom plate, and a second supporting portion disposed on the supporting crossbeam;

[0017] The first supporting portion includes a first upright portion and an adjusting portion connected to the first upright portion, and the adjusting portion can be raised and lowered along the first upright portion.

[0018] In some embodiments of the present application, the first fixing member includes a first fixing seat and a fixing end connected to the first fixing seat;

[0019] There are two second fixing members, which are respectively arranged on both sides of the second supporting portion. The second fixing member includes a second fixing seat and a fixing end portion connected to the second fixing seat.

[0020] In some embodiments of the present application, a sensor is further included, wherein the sensor includes a signal transmitting part and a signal receiving part arranged on opposite sides of the detection position, and is used to detect whether there is a part to be detected in the detection position.

[0021] On the other hand, the present application also proposes a detection system, which includes a measuring machine, and the measuring machine is arranged above any of the above-mentioned limiting devices.

[0022] Compared with the prior art, the advantages and positive effects of the present invention are:

[0023] The limit device involved in the present application is used to support the workpiece to be measured through a bottom support assembly. The first movable member and the second movable member in the movable limit assembly respectively limit the workpiece to be measured in the horizontal direction and along two directions perpendicular to each other, so that the detection position of the workpiece to be detected is more precise, and the positioning accuracy between the workpiece to be detected and the measuring machine is high, which helps to ensure the detection accuracy. There is no need for manual alignment and reliance on manual experience. The operation is highly intelligent and can improve the consistency of the clamping posture of the workpiece to be detected during batch detection, which is beneficial to improving measurement accuracy and measurement efficiency, reducing labor costs, and reducing labor intensity.

[0024] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a structural schematic diagram of an embodiment of the detection system proposed by the utility model;

[0027] Figure 2 It is a schematic diagram of the position of the part to be tested on the limit device;

[0028] Figure 3 1 is a schematic diagram of the structure of the limit device;

[0029] Figure 4 It is a schematic diagram of the disassembly of the limit device;

[0030] Figure 5 is a schematic diagram of the structure of the bracket;

[0031] Figure 6 is a schematic structural diagram of a first support portion;

[0032] Figure 7 is a schematic diagram of the structure of the third support part;

[0033] Figure 8 is a schematic diagram of the structure of the first fixing member;

[0034] Fig. 9 is a schematic diagram of the structure of the second fixing member;

[0035] Fig.10 is a schematic structural diagram of the second moving part;

[0036] Fig.11 is a schematic structural diagram of the first moving part;

[0037] Fig.12 is a schematic cross-sectional view of a limiting end portion on the first moving portion;

[0038] Fig.13 It is a schematic diagram of the structure of the loading and unloading device;

[0039] Fig.14 It is one of the structural diagrams of the material grabbing device;

[0040] Fig.15 This is the second schematic diagram of the material grabbing device structure;

[0041] In the figure,

[0042] 100. Loading and unloading device;

[0043] 110. Conveyor track;

[0044] 120, robot; 130, material grabbing device; 131, first clamping part; 1311, conformal surface; 132, second clamping part; 1321, positioning convex part; 133, connecting part; 134, pressing plate assembly; 1341, connecting back plate; 1342, pressing plate; 1343, elastic part;

[0045] 200, detection device; 210, measuring machine; 220, support table;

[0046] 300, limit device;

[0047] 310, supporting base plate;

[0048] 320, first movable member; 321, first driving part; 322, first adapter plate; 323, first limiting part; 324, limiting end; 325, reinforcing rib; 326, movable end; 3261, arc-shaped convex surface;

[0049] 330, first fixing member; 331, first fixing base plate; 332, first fixing stand;

[0050] 340, second movable member; 341, second driving part; 342, second adapter plate; 343, second limiting part; 344, limiting convex part;

[0051] 350, second fixing member; 351, second fixing bottom plate; 352, second fixing vertical portion;

[0052] 360, supporting upright portion; 361, first supporting portion; 3611, first upright portion; 362, second supporting portion; 363, third supporting portion; 3631, supporting base; 3632, third upright portion; 3633, supporting block;

[0053] 400. Control system;

[0054] 510, signal transmitting unit; 520, signal receiving unit;

[0055] 600, Parts to be tested;

[0056] 700, bracket member; 710, supporting horizontal frame; 720, supporting vertical frame;

[0057] 810, adjusting screw; 820, limiting end; 821, arc-shaped concave surface; 830, fastening bolt. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0059] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0060] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0061] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0062] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0063] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0064] refer to Figure 1 , the present application proposes a limiting device 300 and a detection system.

[0065] refer to Figure 2 The limiting device 300 includes a bottom support component, a fixed limiting component and a movable limiting component. A detection position is formed between the bottom support component, the fixed limiting component and the movable limiting component. The robot 120 places the part to be detected 600 in the detection position. After the part to be detected 600 is placed in the detection position, the part to be detected 600 is further positioned by the movable limiting component to improve the accuracy of its position.

[0066] Specifically, refer to Figure 3 , Figure 4 The bottom support assembly includes a support base plate 310 fixed on the support platform 220 and support vertical portions 360 dispersedly arranged on the support base plate 310 , and the lower processing surface of the to-be-detected component 600 is supported on each support vertical portion 360 .

[0067] The supporting bottom plate 310 is fixed on the upper surface of the supporting platform 220 , and the number of the supporting uprights 360 is plural, so as to improve the stability of supporting the object to be inspected 600 .

[0068] A bottom support assembly, comprising a support base plate 310 and support uprights 360 dispersedly disposed on the support base plate 310;

[0069] The fixed limiting assembly includes a first fixing member 330 and a second fixing member 350 fixedly disposed on the supporting base plate 310 , and functions to form a fixed limiting function on two adjacent sides of the to-be-detected member 600 .

[0070] The movable limiting assembly, the bottom supporting assembly and the fixed limiting assembly form a detection position for placing the to-be-detected member 600.

[0071] The movable limiting assembly includes a first movable member 320 and a second movable member 340 . The first movable member 320 and the second movable member 340 respectively move the detected member 600 toward the first fixed member 330 and the second fixed member 350 to position the detected member 600 .

[0072] refer to Figure 5 , Fig.11 Specifically, the first movable member 320 includes a first driving portion 321 and a first limiting portion 323, and the second movable member 340 includes a second driving portion 341 and a second limiting portion 343. The fixed ends of the first driving portion 321 and the second driving portion 341 are connected to the supporting base plate 310. The first limiting portion 323 is connected to the telescopic end of the first driving portion 321 and can approach or move away from the first fixing member 330 along a first direction. The second limiting portion 343 is connected to the telescopic end of the second driving portion 341 and can approach or move away from the second fixing member 350 along a second direction perpendicular to the first direction.

[0073] Specific reference Figure 5 In order to avoid interference between the fixed limiting assembly and the movable limiting assembly, a bracket member 700 is arranged on the supporting base plate 310, and the bracket member 700 includes supporting uprights 720 spaced apart on the supporting base plate 310 and a supporting cross frame 710 connected between the supporting uprights 720, and the first fixing member 330 and the second fixing member 350 are arranged on the supporting cross frame 710.

[0074] The first fixing member 330 and the first movable member 320 are arranged at two ends of the supporting cross frame 710 relatively along the first direction. The first limiting portion 323 is fixed to the first driving portion 321 through the first adapter plate 322. The first limiting portion 323 is formed with a limiting end portion 324 extending toward the first fixing member 330.

[0075] Specifically, in some embodiments of the present application, the first limiting portion 323 includes a limiting bottom plate and a limiting vertical plate extending vertically upward. In order to improve the stability of the structure between the limiting bottom plate and the limiting vertical plate, a reinforcing rib 325 is further provided between the limiting bottom plate and the limiting vertical plate.

[0076] A threaded hole is formed on the end face close to the first fixing member 330, and the limiting end 324 includes an adjusting screw 810, a limiting end 820 and a fastening bolt 830. The adjusting screw 810 is threadedly connected in the threaded hole, and the fastening bolt 830 is connected to the adjusting screw 810. After the position of the adjusting screw 810 in the threaded hole is adjusted, the fastening bolt 830 is tightened until it contacts the threaded hole to fix the position of the adjusting screw 810.

[0077] That is, the fastening bolt 830 is used to fix the position of the adjusting screw rod 810 relative to the first limiting portion 323 .

[0078] The limiting end 820 is connected to one end of the adjusting screw 810 close to the first fixing member 330 , and is used for directly contacting the to-be-detected member 600 .

[0079] Specifically, since the corresponding position on the engine cylinder head is a rough surface and has not been processed, there is no precision, and the surface is even uneven and inclined. In order to prevent the first limiting portion 323 from clamping and deforming the surface, the limiting end portion 324 on the first limiting portion 323 is designed to be rotatable to an angle that matches the contact surface.

[0080] refer to Fig.12 In some embodiments of the present application, a movable end head 326 is installed on the front side of the limiting end head 820, and an arc-shaped convex surface 3261 is formed in the movable end head 326. An arc-shaped concave surface 821 matching the arc-shaped convex surface 3261 is formed in the limiting end head 820. The movable end head 326 can rotate within a certain range relative to the adjusting screw 810 to adapt to the angle of the corresponding contact surface of the detected part 600.

[0081] The first movable part 320 is used to contact the side of the engine cylinder head end face with a shorter length, and the second movable part 340 is used to contact the side of the engine cylinder head end face with a longer length. Therefore, the number of the first limiting parts 323 of the first movable part 320 can be set to a single one, and in order to improve the stability during the limiting process, the number of the second limiting parts 343 of the second movable part 340 is designed to be two.

[0082] Specifically, refer to Fig.10 In some embodiments of the present application, the telescopic end of the second driving portion 341 is connected to the second adapter plate 342 , and both ends of the second adapter plate 342 are respectively connected to a second limiting portion 343 .

[0083] The two second limiting portions 343 are in contact with the same side of the engine cylinder head, and the engine cylinder head is simultaneously limited and moved, making the movement process more stable and preventing the engine cylinder head from deflecting.

[0084] Specifically, in order to avoid interference with the bracket 700 , a limiting protrusion 344 extending upward is formed at the end of the second limiting portion 343 , the height of the second limiting portion 343 is smaller than the supporting stand 360 , and the height of the limiting protrusion 344 is greater than the supporting stand 360 .

[0085] Copper blocks are respectively disposed on the sides of the first fixing member 330 , the second fixing member 350 and the limiting protrusion 344 that contact the detected member 600 to reduce hard contact with the detected member 600 and avoid wearing the surface of the detected member 600 .

[0086] refer to Figure 4 The support vertical portion 360 is used to support the bottom of the engine cylinder head, and includes a first support portion 361 and a third support portion 363 that are spaced apart on the support bottom plate 310 , and a second support portion 362 that is disposed on the support cross frame 710 .

[0087] The first support portion 361 , the second support portion 362 and the third support portion 363 are connected to form a triangle structure to achieve stable support.

[0088] The bottom of the engine cylinder head is not a plane, and the bottom surfaces of the engine cylinder head where the first support portion 361, the second support portion 362 and the third support portion 363 at corresponding positions contact are not in the same plane.

[0089] Furthermore, due to the existence of machining errors between different batches, there may be machining errors between the bottom position of the engine cylinder head corresponding to the first support portion 361 and the bottom position of the engine cylinder head corresponding to the second support portion 362 and the third support portion 363 .

[0090] In order to improve versatility, the height of the first support portion 361 is designed to be adjustable.

[0091] Specifically, refer to Figure 6 The first supporting portion 361 includes a first vertical portion 3611 and an adjusting portion connected to the first vertical portion 3611 , and the adjusting portion can be raised and lowered along the first vertical portion 3611 .

[0092] Specifically, a threaded hole is formed at the upper end of the first vertical portion 3611, and the adjustment portion includes an adjusting screw 810, a limiting end 820 and a fastening bolt 830. The adjusting screw 810 is threadedly connected in the corresponding threaded hole, the fastening bolt 830 is connected to the adjusting screw 810, and the limiting end 820 is connected to one end of the adjusting screw 810 close to the part to be detected 600. After the position adjustment of the adjusting screw 810 in the threaded hole is completed, the fastening bolt 830 is tightened until it contacts the threaded hole to fix the position of the adjusting screw 810.

[0093] refer to Figure 7 The third supporting portion 363 includes a supporting base 3631, a third vertical portion 3632 vertically arranged on the supporting base 3631, and a supporting block 3633 arranged on the third vertical portion 3632, and the supporting block 3633 is used to contact and connect with the lower processing surface of the part to be detected.

[0094] The first fixing member 330 includes a first fixing seat and a fixing end portion connected to the first fixing seat.

[0095] refer to Figure 8 The first fixing member 330 includes a first fixing base plate 331 and a first fixing stand 332 vertically fixed on the first fixing base plate 331 .

[0096] There are two second fixing members 350 , which are respectively disposed on two sides of the second supporting portion 362 .

[0097] refer to Fig. 9 The second fixing member 350 includes a second fixing base plate 351 and a second fixing stand 352 vertically arranged on the second fixing base plate 351. The second fixing base plate 351 and the second fixing stand 352 can be integrally formed or detachably connected.

[0098] The fixing ends on the first fixing member 330 and the second fixing member 350 can be designed to be adjustable structures, and the adjustment method can be similar to the adjustment part, which will not be described in detail here.

[0099] The limit device 300 is used to support the workpiece 600 to be detected through the bottom support assembly. The first movable member 320 and the second movable member 340 in the movable limit assembly respectively limit the workpiece 600 to be detected in the horizontal direction and along two directions perpendicular to each other, making the detection position of the workpiece 600 to be detected more accurate. The positioning accuracy between the workpiece 600 and the measuring machine 210 is high, which helps to ensure the detection accuracy. There is no need for manual alignment and does not need to rely on manual experience. The operation is highly intelligent, which can improve the consistency of the clamping posture of the workpiece 600 to be detected during batch detection, which is conducive to improving measurement accuracy and measurement efficiency, reducing labor costs, and reducing labor intensity.

[0100] The detection system can realize automatic positioning of automobile engine cylinder heads on machining lines and conduct full-size detection. The detection results can help to compensate and correct the parameters of machining line equipment and increase the yield rate.

[0101] Specific reference Figure 1 , Figure 2 and Fig.13 The present application also proposes a detection system, which includes a loading and unloading device 100 and a detection device 200.

[0102] The loading and unloading device 100 includes a conveying track 110 , a robot 120 and a material grabbing device 130 . The material grabbing device 130 is connected to the robot 120 . The robot 120 can move along the conveying track 110 under the action of a conveying drive motor.

[0103] The material grabbing device 130 is used to be connected to the detection system, and is used to carry and circulate the parts to be detected 600 in the processing line and the measurement area.

[0104] Specific reference Fig.14 , Fig.15 The material grasping device 130 includes a first clamping portion 131, a second clamping portion 132, a driving member and a pressure plate assembly 134. The first clamping portion 131 and the second clamping portion 132 are relatively arranged along the up and down directions under the action of the driving member to clamp the part to be detected 600.

[0105] The driving member is connected to the operating arm of the robot 120 through structures such as the connecting part 133. The operating arm of the robot 120 can rotate and move in all directions to achieve the functions of grabbing the part to be inspected 600, moving the part to be inspected 600, and loading the part to be inspected 600 to the inspection position. After the inspection is completed, the robot 120 can also drive the grabbing device 130 to unload the part to be inspected 600.

[0106] A clamping position is formed between the first clamping portion 131 and the second clamping portion 132. When clamping, the first clamping portion 131 and the second clamping portion 132 extend to the upper and lower sides of the part to be detected 600 respectively. Then, the first clamping portion 131 and the second clamping portion 132 move relative to each other to clamp the part to be detected 600 in the clamping position.

[0107] In order to facilitate positioning and improve the stability of the connection between the detected member 600 and the first clamping portion 131 and the second clamping portion 132 to avoid falling off, a positioning portion is formed on the first clamping portion 131 and / or the second clamping portion 132 .

[0108] The driving member may include two driving structures such as driving cylinders or driving hydraulic cylinders, which are respectively connected to the first clamping part 131 and the second clamping part 132 to drive the first clamping part 131 and the second clamping part 132 separately.

[0109] In other embodiments, the driving member can be a bidirectional hydraulic cylinder, which includes a first output end and a second output end, the first output end is connected to the first clamping part 131, and the second output end is connected to the second clamping part 132, synchronously driving the first clamping part 131 and the second clamping part 132 to move closer to or away from each other.

[0110] Specifically, the pressure plate assembly 134 is disposed between the first clamping portion 131 and the second clamping portion 132 to provide an auxiliary clamping function, and is used to provide a limit for one side of the to-be-detected member 600 .

[0111] The pressure plate assembly 134 includes a connecting back plate 1341, an elastic portion 1343 and a pressure plate 1342. The connecting back plate 1341 is fixed to the fixed end of the driving member. The connecting back plate 1341 can be directly fixed to the driving member or fixed to the driving member through other adapter structures to achieve the fixation of the connecting back plate 1341 on the pressure plate assembly 134.

[0112] The elastic portion 1343 is disposed between the connecting back plate 1341 and the pressing plate 1342 . The moving direction of the pressing plate 1342 in the clamping position is perpendicular to the moving direction of the first clamping portion 131 .

[0113] During the material grabbing process, the part to be detected 600 pushes the pressure plate 1342 toward the connecting back plate 1341, and the elastic part 1343 is in a compressed state. The pressure plate 1342 exerts an outward force on the part to be detected 600 under the action of the elastic part 1343, and tightly connects the part to be detected 600 and the positioning part, thereby avoiding looseness between the material grabbing device 130 and the part to be detected 600 due to a gap formed between the positioning part and the part to be detected 600 during the actual grabbing process.

[0114] That is, under the action of the first clamping portion 131 , the second clamping portion 132 and the pressing plate 1342 , the to-be-detected member 600 is more firmly and stably connected in the clamping position.

[0115] In practice, the part to be tested 600 involved in the present application is an engine cylinder head, which is one of the important structural components of an internal combustion engine. The engine cylinder head is located on the upper part of the engine and covers the engine cylinder block. Its main function is to seal the engine cylinder block to ensure that the pressure in the cylinder does not leak.

[0116] The engine cylinder head is often in contact with high-temperature and high-pressure combustion gas, and therefore bears great thermal and mechanical loads. The qualification inspection of the position of the automobile cylinder head air duct is very important. The position and shape of the air duct have a direct impact on the performance of the engine, including combustion efficiency, fuel economy, and power output. Therefore, the cylinder head air duct size is accurately inspected.

[0117] An upper processing surface and a lower processing surface are formed at the upper and lower ends of the engine cylinder head. The upper processing surface is used for contacting and connecting with the first clamping part 131 , and the lower processing surface is used for contacting and connecting with the second clamping part 132 .

[0118] Specifically, the first clamping portion 131 and the second clamping portion 132 are both L-shaped, and include a clamping vertical portion connected to the driving member and a clamping horizontal portion vertically arranged at the end of the clamping vertical portion.

[0119] A first clamping surface is formed on the first clamping portion 131 . Specifically, the first clamping surface is formed on the lower surface of the clamping transverse portion thereof. The positioning portion includes a conforming surface 1311 formed on the first clamping surface. The conforming surface 1311 is adapted to the upper processing surface.

[0120] The positioning portion includes a positioning protrusion 1321 formed on the second clamping portion 132 and extending toward the first clamping portion 131. The positioning protrusion 1321 is located on the upper surface of the clamping cross portion of the second clamping portion 132. The number of the positioning protrusions 1321 matches the number and positions of the positioning holes formed on the lower processing surface. The positioning protrusions 1321 extend into the corresponding positioning holes.

[0121] When clamped, the positioning protrusion 1321 is connected to the positioning hole at the bottom of the part to be detected 600, and the conforming surface 1311 is adapted to the mounting surface on the part to be detected 600. Since the dimensional error between the positioning protrusion 1321 and the positioning hole, and between the conforming surface 1311 and the mounting surface may cause the part to be detected 600 to shake during the loading and unloading process, the pressure plate 1342 is designed to apply an outward thrust to the part to be detected 600, and the outer side of the part to be detected 600 is tightly connected with the first clamping part 131 and the second clamping part 132, so as to reduce the shaking of the part to be detected 600 in the clamping position.

[0122] The detection device 200 specifically includes a support platform 220 and a measuring machine 210 . The bottom of the support platform 220 is supported on the ground, and the measuring machine 210 is installed on the support platform 220 .

[0123] The measuring machine 210 is an automated measuring device, on which a measuring head is formed. After the inspected piece 600 is placed at the target inspection position on the support table 220 , the measuring head measures the dimensions along the surface of the inspected piece 600 to achieve automated inspection.

[0124] A limit device 300 is provided on the support table 220 and is located below the measuring machine 210. After the robot 120 places the part to be detected 600 at the measuring position, the limit device 300 further positions the part to be detected 600, so that the position of the part to be detected 600 is accurate, thereby improving the detection accuracy.

[0125] The material grabbing device 130 is mainly used for material handling and turnover in the machining line and measuring area; the robot 120 can be automatically loaded and unloaded, and automatically positioned and measured. By integrating online detection, the detection cost is greatly reduced, and the cylinder head is ensured to be fast, stable, and effective in full-size online detection, thereby improving production efficiency and consistency, and effectively controlling the quality of the workpiece processing process.

[0126] The incoming material docking method is that the robot 120 grabs the part to be inspected 600 from the machining line area, and the robot 120 docks with the existing machining line. After grabbing the part to be inspected 600, it is placed on the measuring station positioning fixture for automatic clamping for inspection. After the inspection, the robot 120 grabs the corresponding machining line according to the inspection results for unloading and sorting.

[0127] In addition, the detection system also includes a sensor and a control system 400 .

[0128] The sensor is disposed on the support platform 220 , and includes a signal transmitting portion 510 and a signal receiving portion 520 disposed relatively on two sides of the detection position, and is used to detect whether there is a to-be-detected component 600 in the detection position.

[0129] The control system 400 is connected to the measuring machine 210 , the robot 120 , the driving member, the first driving unit 321 and the second driving unit 341 by signals to control the start and stop of the corresponding driving structure.

[0130] The present application realizes the full-size online automatic detection function of the automobile engine cylinder head. The detection data results can be automatically saved and counted through the control system 400. At the same time, it can also be combined with the statistical analysis software to realize the statistical analysis of the measurement characteristics. According to the results of the statistical analysis, the compensation value is fed back to the machining equipment for real-time adjustment of the machining parameters. The entire detection process does not require human intervention, which greatly improves the product accuracy consistency and detection efficiency. It has a high degree of intelligence, reduces labor costs, reduces labor intensity, and improves the management and control quality and production efficiency during the cylinder head processing process.

[0131] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0132] The above is only a specific implementation method of the utility model, but the protection scope of the utility model is not limited to this. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A limiting device, characterized in that: include: A bottom support assembly, comprising a support bottom plate and support uprights dispersedly arranged on the support bottom plate; A fixed limiting assembly, comprising a first fixing member and a second fixing member fixedly arranged on the supporting bottom plate; A movable limiting assembly, which forms a detection position for placing a part to be detected with the bottom support assembly and the fixed limiting assembly, the movable limiting assembly includes a first movable part and a second movable part, the first movable part includes a first driving part and a first limiting part, the second movable part includes a second driving part and a second limiting part, the fixed ends of the first driving part and the second driving part are connected to the supporting bottom plate, the first limiting part is connected to the telescopic end of the first driving part, and can approach or move away from the first fixed part along a first direction, the second limiting part is connected to the telescopic end of the second driving part, and can approach or move away from the second fixed part along a second direction perpendicular to the first direction.

2. The limiting device according to claim 1, characterized in that: The support base is provided with a support member, and the support member includes support vertical frames spaced apart on the support base and support horizontal frames connected between the support vertical frames, and the first fixing member and the second fixing member are provided on the support horizontal frames.

3. The limiting device according to claim 2, characterized in that: The first fixing member and the first movable member are arranged at two ends of the supporting cross frame relatively along a first direction, the first limiting portion is fixed to the first driving portion through a first adapter plate, and a limiting end portion extending toward the first fixing member is formed on the first limiting portion.

4. The limiting device according to claim 3, characterized in that: A threaded hole is formed on the end face of the first limiting portion close to the first fixing piece, and the limiting end portion includes an adjusting screw, a limiting end head and a fastening bolt. The adjusting screw is connected in the threaded hole, and the fastening bolt is connected to the outside of the adjusting screw for fixing the position of the adjusting screw relative to the first limiting portion. The limiting end head is connected to one end of the adjusting screw close to the first fixing piece.

5. The limiting device according to claim 4, characterized in that: A movable end is detachably connected to the front side of the limiting end, an arcuate convex surface is formed on the movable end, an arcuate concave surface matching the arcuate convex surface is formed on the limiting end, and the movable end can rotate within a certain range relative to the limiting end.

6. The limiting device according to claim 1, characterized in that: The telescopic end of the second driving part is connected to a second adapter plate, and the two ends of the second adapter plate are respectively connected to a second limiting part, and the end of the second limiting part is formed with a limiting protrusion extending upward, the height of the second limiting part is smaller than the supporting vertical part, and the height of the limiting protrusion is greater than the supporting vertical part.

7. The limiting device according to claim 2, characterized in that: The supporting upright portion includes a first supporting portion and a third supporting portion which are spaced apart on the supporting bottom plate, and a second supporting portion which is arranged on the supporting horizontal frame; The first supporting portion includes a first upright portion and an adjusting portion connected to the first upright portion, and the adjusting portion can be raised and lowered along the first upright portion.

8. The limiting device according to claim 7, characterized in that: The first fixing member includes a first fixing seat and a fixing end portion connected to the first fixing seat; There are two second fixing members, which are respectively arranged on both sides of the second supporting portion. The second fixing member includes a second fixing seat and a fixing end portion connected to the second fixing seat.

9. The limiting device according to claim 1, characterized in that: It also includes a sensor, which includes a signal transmitting part and a signal receiving part arranged on two opposite sides of the detection position, and is used to detect whether there is a part to be detected in the detection position.

10. A detection system, characterized in that: It also includes a measuring machine, which is arranged above the limiting device involved in any one of claims 1-9.

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