A fuel injector assembly detection device

Abstract

The present invention relates to the technical field of fuel injector detection, and specifically to a fuel injector assembly detection device, comprising a support frame, a top air supply mechanism being provided at the top of the support frame, a left clamping mechanism and a right clamping mechanism being provided at the inner left and right ends of the support frame respectively for clamping the fuel injector, a lateral air supply mechanism being provided on the left clamping mechanism and the right clamping mechanism, and a synchronous transmission mechanism being provided on the support frame for driving the left clamping mechanism and the right clamping mechanism to move synchronously, and the lateral air supply mechanism and the top air supply mechanism being coordinated with the bottom sealing mechanism, ventilation detection and sealing can be performed separately on different positions of the fuel injector during the sealing detection of the fuel injector, and different positions of the fuel injector can be detected one by one, which can more intuitively reflect the position where the fuel injector has insufficient sealing, so that the staff can formulate corresponding solutions.

Description

Technical Field

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

[0002] Fuel injectors are primarily used in various fuel-powered engine systems. The injector itself is a normally closed valve, with a valve needle moving up and down to control the opening and closing of the valve. There are various control types for fuel injectors, including mechanical injectors that rely on mechanical pressure and the movement of mechanical components to control fuel injection. The injection pump pressurizes the fuel and delivers it to the injector. When the fuel pressure reaches a certain value, it overcomes the spring pressure, pushing the needle valve upward, and fuel is ejected from the spray hole at high speed. When the pressure drops, the spring force returns the needle valve to close the spray hole.

[0003] When producing mechanical fuel injectors, sealing testing is a very important step to ensure that the fuel injectors meet the design standards and improve the consistency of the fuel injector products. When the fuel injectors are tested for sealing by a sealing testing device, pressurized gas is introduced into the fuel injectors, and then the equipment readings are used to detect whether the fuel injectors have insufficient sealing problems.

[0004] Testing the fuel injector for sealing in this way can only determine whether the fuel injector has a sealing problem, but cannot determine the location of the fuel injector with insufficient sealing, which affects the staff's judgment of the fuel injector's sealing performance; the fuel injector's return oil port is located on the side of the fuel injector. When clamping the fuel injector, the position of the oil return port needs to be aligned with the inflation test position to facilitate the sealing test of the oil return port position, resulting in the need to align the designated position when placing the fuel injector, affecting the detection efficiency of the fuel injector. Summary of the Invention

[0005] Therefore, the present invention provides a fuel injection nozzle assembly detection device to solve the above technical problems.

[0006] The present invention provides a fuel injector assembly detection device, which includes a support frame, a top air supply mechanism is provided at the top of the support frame, a left clamping mechanism and a right clamping mechanism for clamping the fuel injector are respectively provided at the left and right ends of the inner side of the support frame, a lateral air supply mechanism is commonly provided on the left clamping mechanism and the right clamping mechanism, a synchronous transmission mechanism is provided on the support frame for driving the left clamping mechanism and the right clamping mechanism to move synchronously, and a bottom sealing mechanism is provided at the inner bottom end of the support frame.

[0007] The right clamping mechanism includes a connecting member arranged on the support frame, and two right arc-shaped clamping members distributed up and down are fixedly connected to the left side of the connecting member. A plurality of sickle-shaped latches are evenly distributed on the left side of the right arc-shaped clamping member.

[0008] The connecting part includes a plurality of telescopic guide rods 2 fixedly connected to the support frame, the left ends of the plurality of telescopic guide rods 2 are commonly fixedly connected to a mounting sleeve, the interior of the mounting sleeve is connected to a right mounting back plate for sliding up and down, the right side of the mounting sleeve is fixedly connected to an electric push rod, and the telescopic end of the electric push rod is fixedly connected to the lower surface of the right mounting back plate through a connecting strip.

[0009] According to an embodiment of the present invention, the bottom sealing mechanism includes a first hydraulic cylinder fixedly connected to the upper surface of the bottom end of the support frame, the top of the first hydraulic cylinder is fixedly connected to a connecting plate, the upper surface of the connecting plate is fixedly connected to a rubber sealing gasket, the lower surface of the connecting plate is fixedly connected to a plurality of limiting telescopic rods in a circular array, and the bottom end of the limiting telescopic rod is fixedly connected to the support frame.

[0010] According to an embodiment of the present invention, the synchronous transmission mechanism includes two front-to-rear symmetrical support columns fixedly connected to the bottom end of the support frame, and two bidirectional threaded rods distributed up and down are rotatably connected to the support columns. The left end of the bidirectional threaded rod is fixedly connected to a transmission pulley, and the left side of the transmission pulley is rotatably connected to the support frame through a connecting shaft, and the right end of the bidirectional threaded rod is rotatably connected to the support frame.

[0011] According to an embodiment of the present invention, the left clamping mechanism includes a plurality of evenly distributed telescopic guide rods fixedly connected to the left end inside the support frame, the right ends of the plurality of telescopic guide rods are commonly fixedly connected to a left mounting back plate, the right side of the left mounting back plate is fixedly connected to two left arc-shaped clamping members distributed up and down, the right side of the left arc-shaped clamping member is provided with a plurality of evenly distributed snap-in grooves, the positions of the plurality of snap-in grooves correspond one-to-one to the positions of a plurality of sickle-shaped pins and are snap-fitted.

[0012] According to an embodiment of the present invention, the lateral air delivery mechanism includes two left-right symmetrically distributed sealing sleeves arranged between the opposite surfaces of the left clamping mechanism and the right clamping mechanism, and a plurality of telescopic connecting rods are fixedly connected to the opposite back surfaces of the two sealing sleeves. The right ends of the plurality of telescopic connecting rods on the right side are commonly fixedly connected to a sliding plate, and a plurality of limiting connecting rods uniformly distributed along the front-to-back direction are passed through and elastically slidably connected to the upper surface of the sliding plate, and the limiting connecting rods are fixedly connected to the right clamping mechanism.

[0013] According to an embodiment of the present invention, the top air supply mechanism includes a connecting frame that is clamped on the top of the supporting frame, and the upper surface of the connecting frame is fixedly connected to two front-to-back symmetrical second hydraulic cylinders, and the tops of the two second hydraulic cylinders are commonly fixedly connected to a linkage plate, and the lower surface of the linkage plate is fixedly connected to two front-to-back distributed limiting slide rods, and the bottom ends of the limiting slide rods pass through the lower surface of the connecting frame, and the bottom ends of the two limiting slide rods are commonly fixedly connected to a sealing cover.

[0014] According to an embodiment of the present invention, a sealing ring is provided on the lower surface of the sealing cover, and an air intake pipe is connected through the upper surface of the sealing cover.

[0015] According to an embodiment of the present invention, a curved protrusion is provided on the vertical section of the sickle-shaped bayonet, and the shape of the engaging groove is adapted to the shape of the sickle-shaped bayonet.

[0016] According to an embodiment of the present invention, a gas connection pipe is fixed to and penetrates the left side surface of the sealing sleeve on the left side, and a through hole with a diameter larger than the diameter of the gas connection pipe is opened at the position corresponding to the gas connection pipe on the left mounting back plate, and the left end of the gas connection pipe passes through the through hole on the left mounting back plate.

[0017] According to an embodiment of the present invention, a driving motor is installed on the upper surface of the bottom end of the support frame through a motor seat, and a pulley is fixedly connected to the output shaft of the driving motor. The pulley is connected to multiple transmission pulleys through a belt.

[0018] The technical solution of the present invention is as follows: 1. By configuring the lateral air supply mechanism and the top air supply mechanism in conjunction with the bottom sealing mechanism, different positions of the fuel injector can be ventilated and sealed separately during the sealing test of the fuel injector. By testing different positions of the fuel injector one by one, it is possible to more intuitively reflect the position of the fuel injector where the sealing is insufficient, so that the staff can formulate corresponding solutions.

[0019] 2. Through the setting of the lateral gas supply mechanism, it is not necessary to specify the position of the oil return port during the inspection of the fuel injector. The position of the fuel injector in any direction can be wrapped by the lateral gas supply mechanism for sealing or gas delivery. When placing the fuel injector, it can be more convenient and faster, thereby improving the inspection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the fuel injector assembly detection device provided by the present invention.

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the support frame provided by the present invention.

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the top gas transmission mechanism provided by the present invention.

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the synchronous transmission mechanism provided by the present invention.

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the right clamping mechanism provided by the present invention.

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the lateral gas transmission mechanism provided by the present invention.

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the connecting piece provided by the present invention.

[0028] Figure 8 It is a partial cross-sectional schematic diagram of the clamping slot provided by the present invention.

[0029] Figure 9 It is a schematic diagram of the three-dimensional structure of the bottom sealing mechanism provided by the present invention.

[0030] Reference numerals: 1, support frame; 2, bottom sealing mechanism; 3, synchronous transmission mechanism; 4, left clamping mechanism; 5, lateral air supply mechanism; 6, right clamping mechanism; 7, top air supply mechanism; 21, rubber sealing pad; 22, connecting plate; 23, position limiting telescopic rod; 24, first hydraulic cylinder; 31, support column; 32, two-way threaded rod; 33, transmission pulley; 34, connecting shaft; 41, left arc-shaped clamping member; 43, telescopic guide rod 1; 4 4. Left mounting back plate; 45. Snap-in groove; 51. Sliding plate; 52. Telescopic connecting rod; 53. Sealing sleeve; 54. Limit connecting rod; 61. Sickle-shaped latch; 62. Right arc-shaped clamping piece; 64. Connecting piece; 71. Connecting frame; 72. Second hydraulic cylinder; 73. Limiting slide rod; 74. Sealing cover; 75. Linkage plate; 641. Mounting sleeve; 642. Right mounting back plate; 643. Electric push rod; 644. Telescopic guide rod II. DETAILED DESCRIPTION

[0031] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] like Figure 1 and Figure 2 As shown, a fuel injector assembly detection device includes a support frame 1, a top air supply mechanism 7 is provided at the top of the support frame 1, a left clamping mechanism 4 and a right clamping mechanism 6 for clamping the fuel injector are respectively provided at the left and right ends of the inner side of the support frame 1, a lateral air supply mechanism 5 is commonly provided on the left clamping mechanism 4 and the right clamping mechanism 6, a synchronous transmission mechanism 3 is provided on the support frame 1 for driving the left clamping mechanism 4 and the right clamping mechanism 6 to move synchronously, and a bottom sealing mechanism 2 is provided at the inner bottom end of the support frame 1.

[0033] like Figure 1 and Figure 3 As shown, the top air delivery mechanism 7 includes a connecting frame 71 that is clamped on the top of the supporting frame 1. The upper surface of the connecting frame 71 is fixedly connected to two front-to-back symmetrical second hydraulic cylinders 72. The top ends of the two second hydraulic cylinders 72 are commonly fixedly connected to a linkage plate 75. The lower surface of the linkage plate 75 is fixedly connected to two front-to-back distributed limiting slides 73. The bottom ends of the limiting slides 73 pass through the lower surface of the connecting frame 71. The bottom ends of the two limiting slides 73 are commonly fixedly connected to a sealing cover 74. The lower surface of the sealing cover 74 is provided with a sealing ring, and the upper surface of the sealing cover 74 is penetrated and connected with an air intake pipe.

[0034] like Figure 1 and Figure 4 As shown, the synchronous transmission mechanism 3 includes two front-to-rear symmetrical support columns 31 fixedly connected to the bottom end of the support frame 1, and two bidirectional threaded rods 32 distributed up and down are rotatably connected to the support columns 31. The left end of the bidirectional threaded rod 32 is fixedly connected to a transmission pulley 33, and the left side of the transmission pulley 33 is rotatably connected to the support frame 1 through a connecting shaft 34. The right end of the bidirectional threaded rod 32 is rotatably connected to the support frame 1. A driving motor is installed on the upper surface of the bottom end of the support frame 1 through a motor seat, and a pulley is fixedly connected to the output shaft of the driving motor. The pulley is connected to multiple transmission pulleys 33 through belts.

[0035] During actual use, first remove the connecting frame 71 from the top of the supporting frame 1, then place the fuel injector between the left clamping mechanism 4 and the right clamping mechanism 6, and then re-clamp the connecting frame 71 to the top of the supporting frame 1. At this time, the driving motor drives the bidirectional threaded rod 32 to rotate on the supporting column 31 through the transmission pulley 33, driving the left clamping mechanism 4 and the right clamping mechanism 6 to clamp the fuel injector between them.

[0036] like Figure 1 and Figure 5 As shown, the right clamping mechanism 6 includes a connecting member 64 arranged on the support frame 1, and two right arc-shaped clamping members 62 distributed vertically are fixedly connected to the left side of the connecting member 64. In order to adapt to the clamping of the fuel injector located on the upper and lower sides of the oil return port, the two right arc-shaped clamping members 62 distributed vertically are of different lengths, and a plurality of sickle-shaped pins 61 are evenly distributed on the left side of the right arc-shaped clamping member 62.

[0037] like Figure 1 、 Figure 4 and Figure 8 As shown, the left clamping mechanism 4 includes a plurality of evenly distributed telescopic guide rods 43 fixedly connected to the left end of the inner part of the support frame 1, and the right ends of the plurality of telescopic guide rods 43 are commonly fixedly connected to a left mounting back plate 44, and the right side of the left mounting back plate 44 is fixedly connected to two left arc-shaped clamping members 41 distributed up and down. In order to adapt to the clamping of the fuel injector located at the upper and lower sides of the oil return port, the two left arc-shaped clamping members 41 distributed up and down are of different lengths, and the right side of the left arc-shaped clamping member 41 is provided with a plurality of evenly distributed snap-in grooves 45. The positions of the plurality of snap-in grooves 45 correspond one-to-one to the positions of the plurality of sickle-shaped snap-in pins 61 and are snap-fitted. The vertical section of the sickle-shaped snap-in pin 61 is provided with an arc-shaped protrusion (not shown in the figure) on the side facing the right arc-shaped clamping member 62, and the shape of the snap-in groove 45 is adapted to the shape of the sickle-shaped snap-in pin 61.

[0038] During specific use, when the bidirectional threaded rod 32 rotates, the bidirectional threaded rod 32 drives the right arc-shaped clamping member 62 and the left arc-shaped clamping member 41 to move toward each other to clamp the fuel injector. Under the action of the telescopic guide rod 43, the left arc-shaped clamping member 41 can be ensured to move in the horizontal direction. When the opposite surfaces of the right arc-shaped clamping member 62 and the left arc-shaped clamping member 41 are fitted together, the left arc-shaped clamping member 41 and the right arc-shaped clamping member 62 are clamped together on the fuel injector to complete the limitation of the fuel injector.

[0039] like Figure 5 and Figure 7As shown, the connecting member 64 includes a plurality of telescopic guide rods 644 fixedly connected to the support frame 1, the left ends of the plurality of telescopic guide rods 644 are commonly fixedly connected to the mounting sleeve 641, the inside of the mounting sleeve 641 is connected to the right mounting back plate 642 for sliding up and down, the right side of the mounting sleeve 641 is fixedly connected to the electric push rod 643, the telescopic end of the electric push rod 643 is fixedly connected to the lower surface of the right mounting back plate 642 through a connecting strip, and the bidirectional threaded rod 32 is threadedly connected to the left mounting back plate 44 and the mounting sleeve 641.

[0040] During specific use, when the bidirectional threaded rod 32 drives the right arc-shaped clamping piece 62 to move through the connecting piece 64, the bidirectional threaded rod 32 drives the right mounting back plate 642 to move through the mounting sleeve 641, and the right mounting back plate 642 drives the right arc-shaped clamping piece 62 to move synchronously. When the right arc-shaped clamping piece 62 is in contact with the left arc-shaped clamping piece 41, the sickle-shaped pin 61 is inserted into the inside of the clamping groove 45, and then the electric push rod 643 is extended to drive the right mounting back plate 642 to move downward inside the mounting sleeve 641, and the vertical section of the sickle-shaped pin 61 is clamped into the inside of the clamping groove 45. The setting of the arc-shaped protrusion on the sickle-shaped pin 61 can make the right arc-shaped clamping piece 62 and the left arc-shaped clamping piece 41 clamped more tightly.

[0041] like Figure 1 and Figure 9 As shown, the bottom sealing mechanism 2 includes a first hydraulic cylinder 24 fixedly connected to the upper surface of the bottom end of the support frame 1, the top of the first hydraulic cylinder 24 is fixedly connected to a connecting plate 22, the upper surface of the connecting plate 22 is fixedly connected to a rubber sealing pad 21, and the lower surface of the connecting plate 22 is fixedly connected to a plurality of limiting telescopic rods 23 in a circular array, and the bottom end of the limiting telescopic rod 23 is fixedly connected to the support frame 1.

[0042] like Figure 1 、 Figure 4 and Figure 6 As shown, the lateral gas transmission mechanism 5 includes two left-right symmetrically distributed sealing sleeves 53 arranged between the opposite surfaces of the left clamping mechanism 4 and the right clamping mechanism 6, and a plurality of telescopic connecting rods 52 are fixedly connected to the opposite back surfaces of the two sealing sleeves 53. The right ends of the plurality of telescopic connecting rods 52 on the right side are commonly fixedly connected to the sliding plate 51. A through groove is provided at the position corresponding to the sliding plate 51 on the right mounting back plate 642, and a plurality of limiting connecting rods 54 are fixedly connected inside the through groove. The circumferential surfaces of the plurality of limiting connecting rods 54 are commonly elastically slidably connected to the sliding plate 51 in the up-down direction, and the sliding plate 51 and the through groove slide in cooperation in the up-down direction.

[0043] like Figure 1 、 Figure 4 and Figure 6As shown, the left side surface of the left sealing sleeve 53 is fixed and connected with a gas connecting pipe, and a through hole with a diameter larger than the diameter of the gas connecting pipe is opened at the position corresponding to the gas connecting pipe on the left mounting back plate 44, and the left end of the gas connecting pipe passes through the through hole on the left mounting back plate 44.

[0044] During specific use, after the fuel injector is fixed, the first hydraulic cylinder 24 is extended to drive the connecting plate 22 to move upward, and the rubber sealing gasket 21 is pressed against the bottom end of the fuel injector. At the same time, the second hydraulic cylinder 72 is contracted, and the sealing cover 74 is pushed downward by the linkage plate 75 and the limiting slide bar 73 to press against the top end of the fuel injector. Then the sealing test of the fuel injector is started. First, air is supplied through the air supply connecting pipe on the left sealing sleeve 53 to maintain the seal at the top and bottom ends of the fuel injector. Then, the equipment reading is observed to detect whether there is insufficient sealing at the return oil port position. When the sealing test of the return oil port position is qualified, the pressure inside the return oil port of the sealing sleeve 53 is maintained at this time, and then pressurized gas is supplied through the sealing cover 74. Then, the equipment reading is observed to detect whether there is insufficient sealing at the bottom end of the fuel injector. When all tests are completed, the left arc clamp 41 and the right arc clamp 62 are opened, the fuel injector is taken out, and the above steps are repeated to test the sealing of the next fuel injector.

[0045] Working principle: When in use, first remove the connecting frame 71 from the top of the supporting frame 1, then place the fuel injector between the left arc-shaped clamping member 41 and the right arc-shaped clamping member 62, and make the bottom end of the fuel injector touch the upper surface of the rubber sealing pad 21. At this time, clamp the connecting frame 71 on the top of the supporting frame 1, and then drive the left arc-shaped clamping member 41 and the right arc-shaped clamping member 62 to move towards each other through the synchronous transmission mechanism 3, and at the same time drive the sealing sleeve 53 to move synchronously. The sealing sleeve 53 wraps the oil return port of the fuel injector, and at the same time, the left arc-shaped clamping member 41 and the right arc-shaped clamping member 62 clamp the fuel injector, and then the first hydraulic cylinder 24 extends to cooperate with the second hydraulic cylinder 7 2 Contraction to seal the upper and lower ends of the fuel injector, and then start to test the sealing of the fuel injector. First, supply air through the air supply connecting pipe on the left sealing sleeve 53 to maintain the sealing of the top and bottom ends of the fuel injector, and then observe the equipment readings to detect whether the return oil port position has insufficient sealing. When the return oil port position sealing test is qualified, maintain the pressure inside the return oil port of the sealing sleeve 53, and then supply pressurized gas through the sealing cover 74, and then observe the equipment readings to detect whether the bottom end of the fuel injector has insufficient sealing. When all tests are completed, open the left arc clamp 41 and the right arc clamp 62, take out the fuel injector, and repeat the above steps to test the sealing of the next fuel injector.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 limiting the present invention.

[0047] Furthermore, the terms "first," "second," "number one," and "number two" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature designated as "first," "second," "number one," or "number two" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0048] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0049] The embodiments of this specific implementation method are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fuel injector assembly detection device, comprising a support frame (1), characterized in that: The top of the support frame (1) is provided with a top air delivery mechanism (7), the left and right ends of the inner side of the support frame (1) are respectively provided with a left clamping mechanism (4) and a right clamping mechanism (6) for clamping the fuel injector, the left clamping mechanism (4) and the right clamping mechanism (6) are jointly provided with a lateral air delivery mechanism (5), the support frame (1) is provided with a synchronous transmission mechanism (3) for driving the left clamping mechanism (4) and the right clamping mechanism (6) to move synchronously, and the inner bottom end of the support frame (1) is provided with a bottom sealing mechanism (2); The right clamping mechanism (6) comprises a connecting member (64) arranged on the supporting frame (1), the left side of the connecting member (64) being fixedly connected to two right arc-shaped clamping members (62) distributed vertically, and a plurality of sickle-shaped latches (61) being evenly distributed on the left side of the right arc-shaped clamping member (62); The connecting member (64) includes a plurality of telescopic guide rods (644) fixedly connected to the support frame (1), the left ends of the plurality of telescopic guide rods (644) are fixedly connected to a mounting plate (641), the interior of the mounting plate (641) is connected to a right mounting back plate (642) in an upward and downward sliding manner, the right side of the mounting plate (641) is fixedly connected to an electric push rod (643), and the telescopic end of the electric push rod (643) is fixedly connected to the lower surface of the right mounting back plate (642) via a connecting strip; The lateral gas delivery mechanism (5) comprises two symmetrically distributed sealing sleeves (53) arranged between the opposite surfaces of the left clamping mechanism (4) and the right clamping mechanism (6), a plurality of telescopic connecting rods (52) are fixedly connected on the opposite back surfaces of the two sealing sleeves (53), the right ends of the plurality of telescopic connecting rods (52) on the right side are fixedly connected to a sliding plate (51), and a plurality of limiting connecting rods (54) uniformly distributed in the front-back direction are passed through the upper surface of the sliding plate (51) and elastically slidably connected thereto, and the limiting connecting rods (54) are fixedly connected to the right clamping mechanism (6).

2. The fuel injector assembly detection device according to claim 1, characterized in that: The bottom sealing mechanism (2) comprises a first hydraulic cylinder (24) fixedly connected to the upper surface of the bottom end of the support frame (1); the top end of the first hydraulic cylinder (24) is fixedly connected to a connecting plate (22); the upper surface of the connecting plate (22) is fixedly connected to a rubber sealing pad (21); the lower surface of the connecting plate (22) is fixedly connected to a plurality of limiting telescopic rods (23) in a circumferential array; the bottom ends of the limiting telescopic rods (23) are fixedly connected to the support frame (1).

3. The fuel injector assembly detection device according to claim 1, characterized in that: The synchronous transmission mechanism (3) comprises two front-to-back symmetrical support columns (31) fixedly connected to the bottom end of the support frame (1); two bidirectional threaded rods (32) distributed vertically are rotatably connected to the support columns (31); the left end of the bidirectional threaded rod (32) is fixedly connected to a transmission pulley (33); the left side of the transmission pulley (33) is rotatably connected to the support frame (1) via a connecting shaft (34); and the right end of the bidirectional threaded rod (32) is rotatably connected to the support frame (1).

4. The fuel injector assembly detection device according to claim 1, characterized in that: The left clamping mechanism (4) comprises a plurality of evenly distributed telescopic guide rods (43) fixedly connected to the left end of the interior of the support frame (1); the right ends of the plurality of telescopic guide rods (43) are fixedly connected to a left mounting back plate (44); the right side of the left mounting back plate (44) is fixedly connected to two left arc-shaped clamping members (41) distributed up and down; the right side of the left arc-shaped clamping member (41) is provided with a plurality of evenly distributed snap-in grooves (45); the positions of the plurality of snap-in grooves (45) correspond one-to-one to the positions of the plurality of sickle-shaped snap-in pins (61) and are snap-fitted.

5. The fuel injector assembly detection device according to claim 1, characterized in that: The top gas transmission mechanism (7) comprises a connecting frame (71) clamped on the top of the supporting frame (1), the upper surface of the connecting frame (71) is fixedly connected to two front-to-back symmetrical second hydraulic cylinders (72), the top ends of the two second hydraulic cylinders (72) are fixedly connected to a linkage plate (75), the lower surface of the linkage plate (75) is fixedly connected to two front-to-back distributed limiting slide bars (73), the bottom ends of the limiting slide bars (73) pass through the lower surface of the connecting frame (71), and the bottom ends of the two limiting slide bars (73) are fixedly connected to a sealing cover (74).

6. The fuel injector assembly detection device according to claim 5, characterized in that: A sealing ring is provided on the lower surface of the sealing cover (74), and an air intake pipe is connected through the upper surface of the sealing cover (74).

7. The fuel injector assembly detection device according to claim 4, characterized in that: A curved protrusion is provided on the vertical section of the sickle-shaped latch (61), and the shape of the latching groove (45) is adapted to the shape of the sickle-shaped latch (61).

8. The fuel injector assembly detection device according to claim 4, characterized in that: A gas connection pipe is fixed to the left side of the sealing sleeve (53) on the left side and is connected therethrough. A through hole having a diameter larger than that of the gas connection pipe is provided at a position on the left mounting back plate (44) corresponding to the gas connection pipe. The left end of the gas connection pipe passes through the through hole on the left mounting back plate (44).

9. The fuel injector assembly detection device according to claim 3, characterized in that: A driving motor is mounted on the upper surface of the bottom end of the support frame (1) via a motor seat, a pulley is fixedly connected to the output shaft of the driving motor, and the pulley is connected to a plurality of transmission pulleys (33) via a belt.

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