A device and method for detecting diameter of a fuel injector nozzle hole

Abstract

The present invention relates to the technical field of fuel injector detection, and in particular to a diameter detection device for a fuel injector nozzle hole and a method thereof, which comprises a support plate, a transmission component is provided on the top of the support plate, and an output component is provided on the top of the support plate; a detection mechanism, which comprises a rotating component provided on the top of the output component, and a plurality of detection components are provided on the surface of the rotating component. Automatic transmission and rotation drive of the fuel injector are achieved through the transmission component and the output component. The rotating component of the detection mechanism drives the detection component to rotate synchronously, and cooperates with the centering component to automatically complete the centering of the fuel injector hole and the detection needle during the rotation process. The relative motion generated by the rotation of different axes is used to realize automatic insertion detection of the detection needle, and the close contact between the detection needle and the nozzle hole is ensured by the extrusion component. The cleaning pad and the ink-stained pad complete the cleaning and marking before and after the detection, so as to realize efficient and accurate detection of the nozzle hole diameter of the fuel injector.

Description

Technical Field

[0001] The present invention relates to the technical field of fuel injector detection, and in particular to a fuel injector nozzle diameter detection device and method. Background Art

[0002] In modern internal combustion engine fuel injection systems, the fuel injector is a core component, and the accuracy of its spray hole diameter directly affects the fuel atomization effect, combustion efficiency and exhaust emission performance.

[0003] A Chinese patent discloses a device for detecting the diameter of a nozzle orifice of a fuel injector, with the publication number CN118583104A. The device comprises a base, a fixed base and a movable base are respectively provided on both sides of the top of the base, a slide rail is provided at the bottom of the movable base, the bottom of the slide rail is fixedly connected to the top of the base, a turntable is rotatably provided on one side of the movable base, an arc-shaped groove is provided on the rear side of one side of the turntable, an arc-shaped piece is provided in the arc-shaped groove, one side of the arc-shaped piece is fixedly connected to one side of the movable base, a shell is fixedly provided on the other side of the arc-shaped piece, a magnifying glass is provided on one side of the front of the shell, a detection structure is provided on one side of the turntable, and a marking structure is provided inside the shell; through the base A fixed seat and a movable seat are provided on the top, and a marking structure and a detection structure are provided in the movable seat, and the two can be used in conjunction with each other. The marking structure can press the fuel nozzle through the ink-absorbing pad, and ink marks can be left on the fuel nozzle when pressed, and the movement of the detection needle will be triggered synchronously. The protruding detection needle will be inserted into the nozzle at the same time. When the detection needle inserted into the nozzle is pulled out, the ink accumulated at the smallest diameter will remain on the detection needle. The size of the diameter can be known by observing the position of the accumulated ink circle on the detection needle. The detection needle is white throughout and is very convenient to observe with different colored inks. A wiping pad is provided on the back of the ink-absorbing pad. After observing the detection needle, the wiping pad will wipe the ink on the surface of the detection needle when the detection needle is retracted.

[0004] According to the technical effects of the above-mentioned existing technologies and technical solutions, there are still areas that need to be optimized: in the above-mentioned patent, only one fuel injector can be inspected at a time, and multi-station inspection cannot be achieved. In addition, during the inspection process, the spray hole of the fuel injector needs to be aligned and clamped with the inspection needle in advance, which reduces the efficiency of the inspection and takes a long time. Summary of the Invention

[0005] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0006] The present invention is proposed in view of the above-mentioned problems existing in the conventional diameter detection device for the nozzle hole of the fuel injector.

[0007] Therefore, the purpose of the present invention is to provide a diameter detection device for a fuel injector nozzle hole, the purpose of which is to achieve rapid and accurate measurement of the fuel injector nozzle hole diameter through an automated transmission and rotation drive structure combined with an innovative centering and detection component design.

[0008] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising:

[0009] A support mechanism comprising a support plate, a conveying assembly being provided on the top of the support plate, and an output assembly being provided on the top of the support plate;

[0010] The output assembly includes a fixed ring arranged on the top of the support plate, a servo motor is arranged on the top of the fixed ring, the output end of the servo motor is connected to the main transmission column, an auxiliary transmission column is arranged on the left side of the main transmission column, and pulleys are arranged on the surfaces of the main transmission column and the auxiliary transmission column, and the surfaces of the pulleys are connected by belt transmission;

[0011] The detection mechanism includes a rotating assembly arranged on the top of the output assembly, and a plurality of detection components are provided on the surface of the rotating assembly;

[0012] Among them, the rotating assembly includes a rotating disk arranged on the top of the main transmission column, the bottom of the rotating disk is fixedly connected to the top of the auxiliary transmission column, a connecting disk is provided on the outside of the rotating disk, a placement ring is provided on the outside of the connecting disk, and an annular groove is opened on the top of the connecting disk, and the annular groove is opened along the periphery of the rotating disk.

[0013] As a preferred solution of the diameter detection device for the fuel injector nozzle hole of the present invention, the conveying assembly includes a fixed plate arranged on the top of the support plate, a conveyor belt is arranged on the side opposite to the fixed plate, and the conveyor belt is driven by a conveying motor. The conveying motor is arranged on the right side of the fixed plate, and a mechanical clamp is arranged on the left side of the fixed plate.

[0014] As a preferred solution of the diameter detection device for the nozzle hole of the fuel injector according to the present invention, the detection component includes a fixed block arranged on the surface of the annular groove, a plurality of detection needles are arranged on the right side of the fixed block, and an extrusion component is arranged inside the plurality of detection needles, a cleaning pad and an ink dyeing pad are respectively arranged on the right side of the plurality of detection needles, and a connecting block is provided at the bottom of the cleaning pad and the ink dyeing pad.

[0015] As a preferred solution of the diameter detection device for the injector nozzle hole of the present invention, the extrusion component includes an extrusion sleeve arranged on the right side of the fixed block, an extrusion groove is opened inside the extrusion sleeve, and an extrusion spring is provided on the surface of the extrusion groove, and the left and right sides of the extrusion spring are respectively fixedly connected to the inner wall of the extrusion sleeve and the inner side of the detection needle.

[0016] As a preferred solution of the diameter detection device for the nozzle hole of the fuel injector according to the present invention, several placement plates are provided on the outside of the placement ring, a placement groove is provided on the top of the placement plate, the placement groove is used to place the fuel injector, and a centering component is provided on the top of the placement plate.

[0017] As a preferred solution of the diameter detection device for the injector nozzle hole of the present invention, the centering component includes a clamping block arranged at both ends of the top of the placement plate, the opposite side of the clamping block is rotatably connected to a rotating rod through a rotating shaft, a sliding groove is provided on the left side of the rotating rod, and a torsion spring is sleeved on the surface of the rotating shaft, and the two sides of the torsion spring are respectively fixedly connected to the rotating rod and the opposite side of the clamping block.

[0018] As a preferred solution of the diameter detection device for the fuel injector nozzle hole of the present invention, wherein: connecting rods are passed through the front and rear sides of the fixed block, extrusion rods are provided on both sides of the connecting rods, shift rods are provided on the opposite side of the extrusion rods, and sliding blocks are provided on the right side of the extrusion rods, and the outer side of the sliding block is slidably connected to the inner side of the sliding groove.

[0019] As a preferred solution of the diameter detection device for the nozzle hole of the present invention, the four ends of the bottom of the connecting plate are fixedly connected to fixing columns, and the bottoms of the fixing columns are fixedly connected to the top of the support plate.

[0020] The beneficial effects of the present invention are as follows: the automatic transmission and rotation drive of the fuel injector are realized through the transmission component and the output component, the rotating component of the detection mechanism drives the detection component to rotate synchronously, and the centering component automatically completes the centering of the fuel injector hole and the detection needle during the rotation process, and the relative movement generated by the rotation of different axes is utilized to realize the automatic insertion detection of the detection needle, and the close contact between the detection needle and the nozzle is ensured by the extrusion component, and the cleaning pad and the ink-stained pad complete the cleaning and marking before and after the detection, so as to realize the efficient and accurate detection of the nozzle hole diameter of the fuel injector.

[0021] In view of the above-mentioned problems existing in the existing method for detecting the diameter of the nozzle hole of the fuel injector, the present invention is proposed.

[0022] Therefore, the purpose of the present invention is to provide a diameter detection method for the nozzle orifice of the fuel injector, the purpose of which is to: by utilizing the mechanical linkage characteristics of the detection device, based on the relative movement generated by the rotation of different axes, realize automatic centering and insertion detection of the detection needle and the nozzle orifice of the fuel injector, thereby avoiding errors and efficiency losses caused by manual intervention.

[0023] In order to solve the above technical problems, the present invention provides the following technical solution: the fuel injector is clamped by a mechanical clamp and placed on the surface of the placement groove, and then the fuel injector hole is inspected in turn by the detection target through the rotation of the rotating disk.

[0024] As a preferred solution of the diameter detection method for the injector nozzle hole of the present invention, the output component is used to drive the rotating disk to rotate, and when the rotating disk rotates, the placement ring is rotated through the connection relationship between the extrusion rod, the sliding block, the sliding groove and the rotating rod, and the connecting disk is in a fixed state and does not rotate. Since the rotating disk adopts an eccentric setting, the distance between the rotating disk and the placement ring gradually becomes smaller during rotation, and the detection needle can be automatically inserted for detection.

[0025] The beneficial effects of the present invention are as follows: when the rotating disk rotates, the extrusion rod on one side of the fixed block can be driven to move synchronously, and the movement of the extrusion rod can be driven to move synchronously, thereby synchronously driving the placement ring to rotate. Since the sliding block and the sliding groove are in a sliding connection state, and because the rotating disk and the placement ring are set on different axes, when the rotating disk rotates, the sliding block gradually moves outward on the surface of the sliding groove, and the rotating rod is rotated by the extrusion of the sliding block, and the oil nozzle is sprayed and squeezed until the aperture is aligned with the detection needle. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0027] Figure 1 Schematic diagram of the support mechanism provided by the present invention.

[0028] Figure 2 This is a schematic cross-sectional view of the rotating disk provided by the present invention.

[0029] Figure 3 The present invention provides Figure 2 A local enlarged schematic diagram of point A in the middle.

[0030] Figure 4 This is a schematic diagram of the connection disk provided by the present invention.

[0031] Figure 5 This is a schematic diagram of the detection component provided by the present invention.

[0032] Figure 6 This is a schematic diagram of the placement plate and placement slot provided by the present invention.

[0033] Figure 7 This is a schematic cross-sectional view of the detection needle provided by the present invention.

[0034] Figure 8 This is a schematic diagram of the centering component provided by the present invention.

[0035] Figure 9 This is a schematic diagram of the connecting rod, extrusion rod, and shift rod provided by the present invention. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0039] Furthermore, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing the embodiments of the present invention, cross-sectional views illustrating device structures may be partially enlarged and not to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included. Example 1

[0040] Reference Figures 1 to 9 , which is the first embodiment of the present invention, provides a method for detecting the diameter of a fuel injector nozzle hole, thereby realizing automatic detection of the fuel injector nozzle hole diameter.

[0041] The fuel injector is clamped by the mechanical gripper 102d and placed on the surface of the placement groove 206. Then, the fuel injector hole is inspected in sequence by the inspection needle 202b through the rotation of the rotary disk 201a.

[0042] The output component 103 is used to drive the rotating disk 201a to rotate, and when the rotating disk 201a rotates, the placement ring 201c is rotated through the connection relationship among the extrusion rod 209, the sliding block 211, the sliding groove 207d and the rotating rod 207c. The connecting disk 201b is in a fixed state and does not rotate. Since the rotating disk 201a adopts an eccentric setting, the distance between the rotating disk 201a and the placement ring 201c gradually becomes smaller during rotation, and the detection needle 202b can be automatically inserted for detection.

[0043] The conveyor motor 102c drives the conveyor belt 102b to move the oil nozzle to the left side of the fixed plate 102a. The mechanical gripper 102d is activated, and after detecting the position of the oil nozzle through the sensor, it grabs the workpiece and places it in the placement groove 206 outside the placement ring 201c.

[0044] The servo motor 103a-1 starts, driving the main transmission column 103b to rotate through the coupling. The main transmission column 103b and the auxiliary transmission column 103c achieve 1:1 synchronous transmission through the pulley 103d and the belt 103e. Since the fixed block 202a is slidably connected to the surface of the annular groove 201d, it also provides support for the rotating disk 201a, ensuring that the rotating disk 201a rotates smoothly.

[0045] The rotating disk 201a is eccentrically set, and its central axis is offset from the central axis of the connecting disk 201b, so that the radial spacing between the fixed block 202a on the outside of the rotating disk 201a and the placement ring 201c changes periodically as it rotates (the minimum spacing corresponds to the detection station, and the maximum spacing corresponds to the loading station). Example 2

[0046] Reference Figures 1 to 4 , which is the second embodiment of the present invention, provides a support mechanism 100 to provide stable support and power transmission, ensuring the coordinated operation of various components.

[0047] The support mechanism 100 includes a support plate 101 , a conveying assembly 102 is provided on the top of the support plate 101 , and an output assembly 103 is provided on the top of the support plate 101 ;

[0048] The output assembly 103 includes a fixed ring 103a disposed on the top of the support plate 101, a servo motor 103a-1 is disposed on the top of the fixed ring 103a, and the output end of the servo motor 103a-1 is connected to the main transmission column 103b, and a secondary transmission column 103c is disposed on the left side of the main transmission column 103b. The surfaces of the main transmission column 103b and the secondary transmission column 103c are both provided with pulleys 103d, and the surfaces of the pulleys 103d are connected by belts 103e.

[0049] The conveying assembly 102 includes a fixed plate 102a disposed on top of the support plate 101. A conveyor belt 102b is disposed on the side opposite the fixed plate 102a. The conveyor belt 102b is driven by a conveying motor 102c. The conveying motor 102c is disposed on the right side of the fixed plate 102a. A mechanical gripper 102d is disposed on the left side of the fixed plate 102a.

[0050] The four ends of the bottom of the connecting plate 201 b are fixedly connected to the fixing columns 212 , and the bottoms of the fixing columns 212 are fixedly connected to the top of the supporting plate 101 .

[0051] Specifically, the transmission component 102 transmits the fuel injector to the top of the mechanical clamp 102d, and then triggers the clamp to descend through the photoelectric sensor, clamps the fuel injector and lifts it, moves it to the top of the placement plate 205 outside the placement ring 201c, and slowly releases it into the placement slot 206; the servo motor 103a-1 is started, and drives the pulley 103d to rotate through the main transmission column 103b, and the synchronous belt drives the auxiliary transmission column 103c to rotate, and the rotating disk 201a fixed to the main transmission column 103b and the auxiliary transmission column 103c begins to rotate around the center axis, while the connecting disk 201b remains stationary due to the support of the fixed column 212.

[0052] Furthermore, the conveying motor 102c in the conveying assembly 102 drives the conveyor belt 102b to operate, transporting the fuel injector to the left side of the fixed plate 102a. The mechanical gripper 102d starts to clamp the fuel injector and places it in the placement groove 206 of the placement plate 205 outside the placement ring 201c, completing the loading.

[0053] Preferably, the servo motor 103a-1 of the output component 103 drives the main transmission column 103b to rotate, and the main transmission column 103b drives the auxiliary transmission column 103c to rotate synchronously through the pulley 103d and the belt 103e, so that the rotating disk 201a fixedly connected to the auxiliary transmission column 103c starts to rotate around the central axis, and the connecting disk 201b remains stationary due to the connection with the support plate 101 by the bottom fixed column 212. Since the rotating disk 201a adopts an eccentric setting, the fixed block 202a on its outer side rotates with the rotating disk 201a. Since the placement plate 205 is connected to the fixed block 202a through the extrusion rod 209, the sliding block 211, the sliding groove 207d and the rotating rod 207c, the rotating disk 201a simultaneously drives the placement ring 201c to rotate along the periphery of the connecting disk 201b when rotating.

[0054] It should be noted that when the rotating disk 201 a rotates, the connecting disk 201 b does not rotate, and when the rotating disk 201 a rotates, it rotates at the axis position. Example 3

[0055] Reference Figure 1 、 59 is a third embodiment of the present invention, which provides a detection mechanism 200 for detecting and recording the diameter of the injection nozzle hole.

[0056] The detection mechanism 200 includes a rotating assembly 201 disposed on top of the output assembly 103, and a plurality of detection components 202 are disposed on the surface of the rotating assembly 201;

[0057] The rotating assembly 201 includes a rotating disk 201a disposed on the top of the main transmission column 103b. The bottom of the rotating disk 201a is fixedly connected to the top of the auxiliary transmission column 103c. A connecting disk 201b is disposed on the outside of the rotating disk 201a. A placement ring 201c is disposed on the outside of the connecting disk 201b. An annular groove 201d is provided on the top of the connecting disk 201b. The annular groove 201d is opened along the periphery of the rotating disk 201a.

[0058] The detection component 202 includes a fixed block 202a disposed on the surface of the annular groove 201d. Several detection needles 202b are disposed on the right side of the fixed block 202a. Each of the detection needles 202b has an extrusion component 203 disposed therein. A cleaning pad 202c and an ink pad 202d are disposed on the right side of each of the detection needles 202b. Connecting blocks 202e are disposed at the bottom of each of the cleaning pads 202c and ink pads 202d.

[0059] The extrusion component 203 includes an extrusion sleeve 203a disposed on the right side of the fixed block 202a. The extrusion sleeve 203a has an extrusion groove 203b formed therein. An extrusion spring 203c is disposed on the surface of the extrusion groove 203b. The left and right sides of the extrusion spring 203c are fixedly connected to the inner wall of the extrusion sleeve 203a and the inner side of the detection needle 202b respectively.

[0060] The outer side of the placement ring 201c is provided with a plurality of placement plates 205. The top of the placement plate 205 is provided with a placement groove 206 for placing the fuel injector. The placement groove 206 is provided with a centering component 207 on the top of the placement plate 205.

[0061] The centering member 207 includes a clamping block 207a provided at both ends of the top of the placement plate 205. The opposite side of the clamping block 207a is rotatably connected to a rotating rod 207c via a rotating shaft 207b. A sliding groove 207d is provided on the left side of the rotating rod 207c. A torsion spring 207e is sleeved on the surface of the rotating shaft 207b. The two sides of the torsion spring 207e are respectively fixedly connected to the rotating rod 207c and the opposite side of the clamping block 207a.

[0062] Connecting rods 208 pass through the front and rear sides of the fixed block 202a, and squeezing rods 209 are provided on both sides of the connecting rod 208. A shift rod 210 is provided on the opposite side of the squeezing rod 209, and a sliding block 211 is provided on the right side of the squeezing rod 209. The outer side of the sliding block 211 is slidably connected to the inner side of the sliding groove 207d.

[0063] Specifically, when the rotating disk 201a rotates, the distance between them gradually decreases, driving the detection component 202 and the centering component 207 to move synchronously. The detection is completed when the rotating disk 201a rotates to the part with the smallest distance between them (i.e., half a circle 180°). When the detection is completed, the centering component 207 and the detection component 202 can be reset (i.e., the second half circle 180°~360°).

[0064] Furthermore, while the rotating disk 201a continues to rotate, the eccentric design reduces the distance between the rotating disk 201a and the placement ring 201c, so that the detection needle 202b continues to approach the nozzle under the drive of the fixed block 202a, and at the same time, the movement of the squeezing rod 209 drives the lever 210 to move the ink pad 202d, so that the surface of the ink pad 202d is in contact with the nozzle end of the nozzle and ink is left. However, when the detection needle 202b assembly approaches the nozzle, it will pass through the cleaning pad 202c and the ink pad 202d in sequence until it is inserted into the nozzle of the nozzle.

[0065] Preferably, when the detection needle 202b is inserted into the nozzle hole, since the insertion end of the detection needle 202b is set to be conical, when the insertion end of the detection needle 202b contacts the inner wall of the nozzle hole, the extrusion spring 203c of the extrusion component 203 inside the detection needle 202b is compressed. If there are different nozzle holes in the nozzle, the potential energy of the extrusion spring 203c will cause the positions of the detection needles 202b in different positions corresponding to different nozzle holes to be different.

[0066] It should be noted that there are multiple sets of centering components 207, and as the distance between the rotating disk 201a and the placement ring 201c gradually decreases, the injection nozzle can be squeezed and centered; when the distance gradually increases, the centering components 207 will gradually reset.

[0067] The remaining structures are the same as those of Example 2. Example 4

[0068] Reference Figures 1 to 9 , which is the fourth embodiment of the present invention. This embodiment is different from the third embodiment in that: this embodiment provides a diameter detection device for a fuel injector nozzle hole.

[0069] When using the diameter detection device;

[0070] First, the conveying motor 102c in the conveying assembly 102 drives the conveyor belt 102b to move the oil nozzle to the left side of the fixed plate 102a. The mechanical gripper 102d starts to grip the oil nozzle and places it in the placement groove 206 of the placement plate 205 outside the placement ring 201c, completing the loading.

[0071] Then, the servo motor 103a-1 of the output component 103 drives the main transmission column 103b to rotate, and the main transmission column 103b drives the auxiliary transmission column 103c to rotate synchronously through the pulley 103d and the belt 103e, so that the rotating disk 201a fixedly connected to the auxiliary transmission column 103c starts to rotate around the central axis, while the connecting disk 201b remains stationary due to being connected to the support plate 101 by the bottom fixed column 212. Since the rotating disk 201a adopts an eccentric setting, the fixed block 202a on its outer side rotates with the rotating disk 201a. Since the placement plate 205 is connected to the fixed block 202a through the extrusion rod 209, the sliding block 211, the sliding groove 207d and the rotating rod 207c, the rotating disk 201a simultaneously drives the placement ring 201c to rotate along the periphery of the connecting disk 201b when it rotates;

[0072] When the extrusion rod 209, the sliding block 211, the sliding groove 207d and the rotating rod 207c rotate with the rotating disk 201a, the extrusion rod 209 on the connecting rods 208 on the front and rear sides of the fixed block 202a moves accordingly. Since the axial position of the rotating disk 201a is inconsistent with the axial position of the placement ring 201c, as the rotating disk 201a continues to rotate, the eccentric design reduces the distance between the rotating disk 201a and the placement ring 201c, and the sliding block 211 gradually slides outward in the sliding groove 207d, thereby squeezing the rotating rod 207c to rotate around the rotating shaft 207b, the torsion spring 207e is compressed, and the rotating rod 207c rotates outward while generating an extrusion force on the nozzle in the placement groove 206, causing the nozzle to rotate slightly, so that the nozzle is completely fitted with the placement groove 206, so that the axis of the spray hole is automatically aligned with the axis of the detection needle 202b;

[0073] When the fuel injector is completely fitted into the placement groove 206, the nozzle hole of the fuel injector is aligned with the detection needle 202b;

[0074] As the rotating disk 201a continues to rotate, the eccentric design reduces the distance between the rotating disk 201a and the placement ring 201c, allowing the detection needle 202b to continue to approach the nozzle under the drive of the fixed block 202a. At the same time, the movement of the squeezing rod 209 drives the lever 210 to move the ink pad 202d, so that the surface of the ink pad 202d is in contact with the nozzle end of the nozzle and ink is retained. However, when the detection needle 202b assembly approaches the nozzle, it passes through the cleaning pad 202c and the ink pad 202d in sequence until it is inserted into the nozzle of the nozzle.

[0075] When the detection needle 202b is inserted into the nozzle hole of the fuel injector, the insertion end of the detection needle 202b is set to be conical. Therefore, when the insertion end of the detection needle 202b contacts the inner wall of the nozzle hole of the fuel injector, the extrusion spring 203c of the extrusion component 203 inside the detection needle 202b is compressed. If there are different nozzle holes in the fuel injector, the potential energy of the extrusion spring 203c will cause the detection needles 202b in different positions to be located in different positions when corresponding to different nozzle holes.

[0076] Before being inserted, the detection needle 202b will first pass through the ink-stained pad 202d, and its surface will be coated with ink. After being inserted into the nozzle hole, if the nozzle hole diameter is qualified, the ink will be evenly adhered to the detection needle 202b at the minimum aperture of the nozzle hole; if the diameter is out of tolerance, the ink distribution will be abnormal; after completing the insertion test, the detection needle 202b will continue to rotate with the rotating disk 201a, and when leaving the nozzle hole, it will pass through the cleaning pad 202c, and the cleaning pad 202c will wipe the residual ink on the surface of the detection needle 202b; after the rotating disk 201a rotates half a circle, the distance between the rotating disk 201a and the placement ring 201c gradually increases, so that the centering component 207 and the detection needle 202b will gradually reset to prepare for the next test.

[0077] In summary: during the rotation of the rotating disk 201a, the multiple centering components 207 rotate synchronously with the rotating disk 201a and the placement ring 201c, completing the centering and detection of the fuel injectors at their respective workstations in turn, and realizing continuous automatic detection of the nozzle hole diameter of the fuel injector.

Claims

1. A diameter detection device for a fuel injector nozzle, characterized in that: include, A support mechanism (100) comprises a support plate (101), a transmission assembly (102) is provided on the top of the support plate (101), and an output assembly (103) is provided on the top of the support plate (101); wherein the output assembly (103) comprises a fixing ring (103a) provided on the top of the support plate (101), a servo motor (103a-1) is provided on the top of the fixing ring (103a), an output end of the servo motor (103a-1) is connected to a main transmission column (103b), a secondary transmission column (103c) is provided on the left side of the main transmission column (103b), and pulleys (103d) are provided on the surfaces of the main transmission column (103b) and the secondary transmission column (103c), and the surfaces of the pulleys (103d) are connected to each other through a belt (103e); A detection mechanism (200) comprises a rotating assembly (201) disposed on top of the output assembly (103), wherein a surface of the rotating assembly (201) is provided with a plurality of detection components (202); The rotating assembly (201) comprises a rotating disk (201a) arranged on the top of the main transmission column (103b), the bottom of the rotating disk (201a) is fixedly connected to the top of the auxiliary transmission column (103c), a connecting disk (201b) is arranged on the outside of the rotating disk (201a), a placement ring (201c) is arranged on the outside of the connecting disk (201b), an annular groove (201d) is opened on the top of the connecting disk (201b), and the annular groove (201d) is opened along the periphery of the rotating disk (201a); The detection component (202) comprises a fixed block (202a) arranged on the surface of the annular groove (201d); a plurality of detection needles (202b) are arranged on the right side of the fixed block (202a); a plurality of the detection needles (202b) are each provided with an extrusion component (203) inside; a cleaning pad (202c) and an ink-dyeing pad (202d) are respectively provided on the right side of the plurality of the detection needles (202b); and a connecting block (202e) is provided at the bottom of each of the cleaning pad (202c) and the ink-dyeing pad (202d); The rotating disk (201a) is eccentrically arranged.

2. The fuel injector nozzle diameter detection device according to claim 1, characterized in that: The conveying assembly (102) comprises a fixed plate (102a) arranged on the top of the support plate (101); a conveyor belt (102b) is arranged on the side opposite to the fixed plate (102a); the conveyor belt (102b) is driven by a conveying motor (102c); the conveying motor (102c) is arranged on the right side of the fixed plate (102a); and a mechanical clamp (102d) is arranged on the left side of the fixed plate (102a).

3. The diameter detection device for a fuel injector nozzle according to claim 2, characterized in that: The extrusion component (203) comprises an extrusion sleeve (203a) arranged on the right side of the fixed block (202a), an extrusion groove (203b) is provided inside the extrusion sleeve (203a), an extrusion spring (203c) is provided on the surface of the extrusion groove (203b), and the left and right sides of the extrusion spring (203c) are respectively fixedly connected to the inner wall of the extrusion sleeve (203a) and the inner side of the detection needle (202b).

4. The fuel injector nozzle diameter detection device according to claim 3, characterized in that: A plurality of placement plates (205) are provided on the outside of the placement ring (201c), a placement groove (206) is provided on the top of each placement plate (205), and the placement groove (206) is used to place the fuel injection nozzle. A centering component (207) is provided on the top of each placement plate (205).

5. The diameter detection device for a fuel injector nozzle according to claim 4, characterized in that: The centering component (207) comprises a clamping block (207a) arranged at both ends of the top of the placement plate (205); the opposite side of the clamping block (207a) is rotatably connected to a rotating rod (207c) via a rotating shaft (207b); a sliding groove (207d) is provided on the left side of the rotating rod (207c); a torsion spring (207e) is sleeved on the surface of the rotating shaft (207b); and both sides of the torsion spring (207e) are fixedly connected to the rotating rod (207c) and the opposite side of the clamping block (207a), respectively.

6. The fuel injector nozzle diameter detection device according to claim 5, characterized in that: Connecting rods (208) are passed through both front and rear sides of the fixed block (202a), extrusion rods (209) are provided on both sides of the connecting rod (208), a shifting rod (210) is provided on the side opposite to the extrusion rod (209), and a sliding block (211) is provided on the right side of the extrusion rod (209), and the outer side of the sliding block (211) is slidably connected to the inner side of the sliding groove (207d).

7. The fuel injector nozzle diameter detection device according to claim 6, characterized in that: The four ends of the bottom of the connection plate (201b) are all fixedly connected to fixing columns (212), and the bottoms of the fixing columns (212) are all fixedly connected to the top of the support plate (101).

8. A method for detecting the diameter of a fuel injector nozzle, characterized in that: The device for detecting the diameter of the nozzle hole of the fuel injector according to claim 7 further comprises: The fuel injection nozzle is clamped by a mechanical clamp (102d) and placed on the surface of the placement groove (206), and then the fuel injection nozzle hole is inspected in sequence using the inspection needle (202b) through the rotation of the rotating disk (201a).

9. The method for detecting the diameter of a fuel injector nozzle according to claim 8, wherein: The output assembly (103) drives the rotating disk (201a) to rotate, and when the rotating disk (201a) rotates, the placement ring (201c) rotates through the connection relationship between the extrusion rod (209), the sliding block (211), the sliding groove (207d), and the rotating rod (207c), while the connection disk (201b) is in a fixed state and does not rotate. Since the rotating disk (201a) is eccentrically arranged, the distance between the rotating disk (201a) and the placement ring (201c) gradually decreases during rotation, and the detection needle (202b) can be automatically inserted for detection.

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