Air tightness detection device for electronic throttle body of hybrid electric vehicle

Abstract

The invention relates to the technical field of automobile part detection, and discloses a hybrid electric vehicle electronic throttle body air tightness detection device which comprises two sealing plugs used for blocking the two sides of a throttle body and further comprises an electric lead screw sliding table, a placement frame is movably arranged on the electric lead screw sliding table, lug plates are arranged on the two sides of the placement frame, and the electric lead screw sliding table is arranged on the placement frame. An indicating rod is inserted into the lug plate in a sliding mode, the two sides of the sealing plug are connected with air cavity shells, the air cavity shells are connected with indicating assemblies, and the indicating assemblies are used for driving the indicating rod to transversely move after the throttle body is inflated and observing the inflation effect and the gas protection effect. The electronic valve plate is inflated after being rotated and opened, if the indicating rod moves to the target position for too long time, the rotation angle of the electronic throttle valve plate is unqualified, and through linkage of the indicating rod and the differentiator, different numbers of racks can be triggered to move, so that the transverse position of the placement frame is changed, and detection results are differentiated differently. And the intuition of a detection result is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive parts detection, and specifically, to an airtightness detection device for an electronic throttle body of a hybrid vehicle. Background Art

[0002] In the related art, the electronic throttle body is the core actuating component of the electronic throttle control system (ETCS), which is used to replace the traditional mechanical throttle and accurately adjust the engine intake air volume through electronic signals. When the motor runs, the motor drives the metal valve plate to rotate, and the cross-sectional area of the intake passage is changed by rotation to directly control the air flow.

[0003] When the engine is idling, the throttle will retain a very small gap to allow a small amount of air to enter the combustion chamber to ensure the basic combustion requirements. The micro-opening design of the throttle at idle is a necessary condition for the stable operation of the engine, which not only ensures the basic combustion requirements but also avoids mechanical damage and emission deterioration. When detecting the airtightness of the existing electronic throttle body, it is necessary to place the entire valve body in a sealed space to inflate and maintain the air volume for observation. Although this kind of detection can detect whether the airtightness is qualified, the judgment is relatively general and it is impossible to distinguish the reasons for unqualified; therefore, it does not meet the existing requirements, and for this reason, we propose an airtightness detection device for an electronic throttle body of a hybrid vehicle. Summary of the Invention

[0004] The present invention provides an airtightness detection device for an electronic throttle body of a hybrid vehicle. The airtightness detection device for an electronic throttle body of a hybrid vehicle can, through the linkage of the indicating rod and the differentiator, trigger the movement of different numbers of racks, thereby changing the lateral position of the placement rack, so as to make different differentiations on the detection results and improve the intuitiveness of the detection results, solving the problem mentioned in the above background art that when detecting the airtightness of the existing electronic throttle body, it is necessary to place the entire valve body in a sealed space to inflate and maintain the air volume for observation. Although this kind of detection can detect whether the airtightness is qualified, the judgment is relatively general and it is impossible to distinguish the reasons for unqualified.

[0005] To achieve the above object, the present disclosure provides an airtightness detection device for an electronic throttle body of a hybrid vehicle, including two sealing plugs for blocking both sides of the throttle body, and further including an electric screw rod slide table. An placement rack is movably arranged on the electric screw rod slide table. Ear plates are arranged on both sides of the placement rack, and an indicating rod is slidably inserted into the ear plates. Air chamber shells are connected to both sides of the sealing plugs, and an indicating component is connected to the air chamber shells for driving the indicating rod to move laterally after the throttle body is inflated to observe the inflation effect and the air retention effect; After the electronic valve plate rotates and opens, inflate. If it takes too long for the indicating rod to move to the target position, the rotation angle of the valve plate of the electronic throttle body is unqualified.

[0006] Optionally, a vent hole is provided in the sealing plug, and a sliding plug plate for blocking the vent hole is slidably mounted on the sealing plug. A linkage rod is detachably connected to the other side of the sliding plug plate. A rod hole is provided in the ear plate, and the linkage rod passes through the rod hole. A stroke spring is sleeved on the linkage rod, and a stroke ball is fixedly mounted at the end of the linkage rod. The stroke spring is located between the ear plate and the stroke ball. A stroke plate is provided on the side of the electric screw rod slide table, and a first sliding surface and a second sliding surface are provided on the side of the stroke plate adjacent to the stroke ball. The stroke ball intermittently slides on the first sliding surface and the second sliding surface.

[0007] Optionally, there are two sections of the first sliding surface, which are respectively located on both sides of the second sliding surface. The distance between the second sliding surface and the adjacent ear plate is smaller than the distance between the first sliding surface and the adjacent ear plate. The first sliding surface and the second sliding surface are connected by a chamfered inclined surface.

[0008] Optionally, the indicating assembly includes a moving seat slidably mounted on the mounting frame. A clamping table and an end plate are provided on the moving seat. An indicating spring is connected to the end plate, and the indicating spring is sleeved outside the indicating rod. The indicating assembly further includes an airbag column connected to the air chamber housing, and the airbag column abuts against the ear plate away from the indicating rod.

[0009] Optionally, the indicating assembly includes a pneumatic telescopic rod connected to the air chamber housing, and the indicating rod is fixedly connected to the other end of the pneumatic telescopic rod. An indicating spring is sleeved outside the pneumatic telescopic rod, and one end of the indicating spring is connected to the end of the pneumatic telescopic rod.

[0010] Optionally, an electric sliding block is assembled on the electric screw rod slide table, a mechanical screw rod slide table is mounted on the electric sliding block, a moving sliding block is assembled on the mechanical screw rod slide table, and the mounting frame is fixedly mounted on the moving sliding block.

[0011] Optionally, the mechanical screw rod slide table includes a screw rod shaft rotatably mounted, a distinguishing gear is fixedly mounted at the end of the screw rod shaft, a vertical plate is provided on the side of the electric screw rod slide table, a rack is slidably provided on the side of the vertical plate, a fixing rod is fixedly mounted on the vertical plate, a distinguisher is provided on the fixing rod, and the distinguisher is in transmission cooperation with the rack; When the indicating rod touches the distinguisher, the rack slides, so that the distinguishing gear meshes with the rack, changing the position of the electronic throttle body when it reaches the end point.

[0012] Optionally, the distinguisher includes a handle fixedly mounted on the fixing rod, a rotating arm is hinged to the handle, a tension spring is connected between the handle and the rotating arm, and a damping part is jointly provided on the handle and the rotating arm.

[0013] Optionally, a displacement table is installed on the side of the vertical plate. A slider is slidably installed on the displacement table. The slider is fixedly connected to the rack. A rope hole is formed in the displacement table. A steel cable is connected to the side of the slider. The steel cable passes through the rope hole. A rope groove is formed in the side of the vertical plate. A guide wheel is installed on the side of the rope groove. A deflecting wheel is arranged on the side of the vertical plate. The other end of the steel cable passes through the rope groove, passes through the guide wheel and the deflecting wheel, and is fixedly connected to the rotating arm.

[0014] Optionally, there are three groups of the differentiator, the displacement table, the steel cable and the deflecting wheel, and the three differentiators are arranged side by side.

[0015] By the above technical solutions, when the airtightness detection device for the electronic throttle body of a hybrid vehicle provided by the present disclosure is in use: the positions of the indicating rods are different, and the represented detection results are different. The detection results are extended through the changes of the indicating rods at the fixed-point positions, and multiple results can be presented, making the detection results more accurate and effective, and improving the detection efficiency and effect. Through the linkage between the indicating rod and the differentiator, the movement of different numbers of racks can be triggered, thereby changing the horizontal position of the mounting rack, so as to make different differentiations of the detection results and improve the intuitiveness of the detection results.

[0016] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the following specific implementation, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings: Figure 1 is a schematic perspective view of the overall structure of the present invention.

[0018] Figure 2 is the Figure 1 enlarged schematic view of part A of the present invention.

[0019] Figure 3 is a schematic exploded view of the overall structure of the present invention.

[0020] Figure 4 is a schematic front view of the overall structure of the present invention.

[0021] Figure 5 is a schematic perspective view of a part of the present invention.

[0022] Figure 6 is the Figure 5 enlarged schematic view of part B of the present invention.

[0023] Figure 7Schematic structural diagram of an indicating component of the present invention.

[0024] Figure 8 For the present invention Figure 7 Schematic three-dimensional structure diagram of the moving seat of the indicating component.

[0025] Figure 9 Another schematic structural diagram of an indicating component of the present invention.

[0026] Figure 10 Schematic structure diagram of the differentiator in its normal state according to the present invention.

[0027] Figure 11 Schematic structure diagram of the differentiator after being triggered according to the present invention.

[0028] Figure 12 Schematic structure diagram of the rack before movement according to the present invention.

[0029] Figure 13 Schematic structure diagram of the rack after movement according to the present invention.

[0030] Explanation of reference numerals: 10, electric screw rod slide; 20, electric sliding block; 30, mechanical screw rod slide; 31, screw rod shaft; 40, moving sliding block; 50, sealing plug; 51, ventilation port; 110, air chamber housing; 120, airbag column; 130, pneumatic telescopic rod; 310, differentiating gear; 320, vertical plate; 321, rope groove; 322, guiding wheel; 330, fixed rod; 340, differentiator; 341, handle of the differentiator; 342, rotating arm; 343, tension spring; 344, damping part; 350, deflecting wheel; 360, steel cable; 370, displacement platform; 371, rack; 372, slider; 373, displacement spring; 374, rope hole; 410, mounting rack; 420, ear plate; 430, moving seat; 440, clamping table; 450, end plate; 460, indicating rod; 470, indicating spring; 510, sliding plug plate; 520, connecting rod; 530, stroke spring; 540, rod hole; 550, stroke ball; 560, stroke plate; 570, first sliding surface; 580, second sliding surface. Detailed implementation manners

[0031] To make the above-mentioned objects, features, and advantages of the present disclosure more apparent and understandable, the following detailed description of the specific implementation manners of the present disclosure will be given in conjunction with the accompanying drawings. Many specific details are set forth in the following description to fully understand the present disclosure. However, the present disclosure can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present disclosure. Therefore, the present disclosure is not limited by the specific embodiments disclosed below.

[0032] In the description of the present disclosure, it should be understood that the orientation or positional relationships indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present disclosure 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. Therefore, it should not be construed as a limitation on the present disclosure. The terms "first" and "second" used are for distinguishing one element from another and do not have sequentiality and importance. In addition, in the following description when referring to the drawings, the same reference numerals in different drawings represent the same or similar elements, and the present disclosure will not repeat them here.

[0033] In the present disclosure, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0034] According to some embodiments of the present disclosure, a hermeticity detection device for an electronic throttle body of a hybrid vehicle is provided. As shown in Figures 1 - 13 , the hermeticity detection device for the electronic throttle body of the hybrid vehicle includes two sealing plugs 50 for blocking both sides of the throttle body, and also includes an electric screw rod slide table 10. An installation frame 410 is movably arranged on the electric screw rod slide table 10. Ear plates 420 are arranged on both sides of the installation frame 410. An indicating rod 460 is slidably inserted on the ear plates 420. Air chamber shells 110 are connected to both sides of the sealing plugs 50. The air chamber shells 110 are connected to an indicating assembly for driving the indicating rod 460 to move horizontally after the throttle body is inflated to observe the inflation effect and air retention effect.

[0035] After the electronic valve plate rotates and opens, inflation is carried out. If it takes too long for the indicating rod 460 to move to the target position, the rotation angle of the electronic throttle body valve plate is unqualified.

[0036] In this way, the different positions of the indicating rod 460 represent different detection results. The detection results are extended through the change of the indicating rod 460 at the fixed-point position, and three results can be presented, making the detection results more accurate and effective, and improving the detection efficiency and effect.

[0037] In addition, the electric lead screw slide 10 is equipped with an electric slide block 20 , the electric slide block 20 is equipped with a mechanical lead screw slide 30 , the mechanical lead screw slide 30 is equipped with a mobile slide block 40 , and the mounting frame 410 is fixedly installed on the mobile slide block 40 .

[0038] The mechanical screw slide 30 includes a rotatably mounted screw shaft 31, a distinguishing gear 310 is fixedly mounted on the end of the screw shaft 31, a vertical plate 320 is arranged on the side of the electric screw slide 10, a rack 371 is slidably arranged on the side of the vertical plate 320, a fixed rod 330 is fixedly mounted on the vertical plate 320, a distinguisher 340 is arranged on the fixed rod 330, and the distinguisher 340 cooperates with the rack 371 in transmission.

[0039] See Figure 12 and Figure 13 When the indicator rod 460 touches the distinguisher 340, the rack 371 slides, so that the distinguishing gear 310 is meshed with the rack 371, changing the position of the electronic throttle body when it reaches the end point.

[0040] Furthermore, the distinguisher 340 includes a handle 341 fixedly mounted on the fixed rod 330, the handle 341 is hinged with a rotating arm 342, a tension spring 343 is connected between the handle 341 and the rotating arm 342, and a damping part 344 is commonly provided on the handle 341 and the rotating arm 342. In this embodiment, the damping part 344 is configured as a serrated part or covered with a silicone layer.

[0041] See Figure 10 and Figure 11 , the opening and closing angle of the handle 341 and the rotating arm 342 is set to Z. In normal state, Z is greater than 180 degrees, so the tension spring 343 is in a stretched state but has no tendency to reset. Due to the over-center structure, the torque direction of the tension spring is opposite to the movement direction of the rotating arm, forming a self-locking state. In addition, the damping part 344 is set to increase the friction resistance between the handle 341 and the rotating arm 342 in normal state. The damping part 344 suppresses the slight vibration of the rotating arm 342 through friction resistance, ensuring that the distinguisher remains absolutely still in the non-triggered state. When the indicator rod 460 touches the rotating arm 342, the rotating arm 342 is bent, making Z less than 180 degrees. At this time, the tension spring 343 rebounds and recovers, thereby pulling the rotating arm 342 to rotate quickly. High-reliability triggering is achieved by combining geometric constraints with elastic energy storage.

[0042] Specifically, a displacement platform 370 is installed on the side of the vertical plate 320. A slider 372 is slidably installed on the displacement platform 370. The slider 372 is fixedly connected to a rack 371. A rope hole 374 is formed in the displacement platform 370. A steel cable 360 is connected to the side of the slider 372. The steel cable 360 passes through the rope hole 374. A rope groove 321 is formed in the side of the vertical plate 320. A guide wheel 322 is installed on the side of the rope groove 321. A deflector wheel 350 is arranged on the side of the vertical plate 320. The other end of the steel cable 360 passes through the rope groove 321, passes through the guide wheel 322 and the deflector wheel 350, and is fixedly connected to the swing arm 342.

[0043] A tension adjusting nut is provided at the end of the steel cable 360 for compensating the length tolerance of the steel cable. Three groups of the differentiator 340, the displacement platform 370, the steel cable 360 and the deflector wheel 350 are correspondingly arranged. The three differentiators 340 are arranged side by side.

[0044] The three differentiators 340 are arranged side by side, representing different degrees of airtightness. When the differentiator 340 closest to the electric lead screw slide 10 is triggered alone, it means that the valve plate gap is too large and the air leakage is excessive, the airtightness is poor, and it is unqualified.

[0045] When the middle differentiator 340 and the closest differentiator 340 are triggered together, it means that the air leakage amount is within the normal range and the test result is qualified.

[0046] If all three differentiators 340 are triggered, it means that the valve plate is closed too deeply and the opening and closing angle is too small, resulting in too little air leakage. When the engine is idling, the throttle valve will retain a very small gap to allow a small amount of air to enter the combustion chamber to ensure the basic combustion demand. The slightly open design of the throttle valve at idle is a necessary condition for the stable operation of the engine, which not only ensures the basic combustion demand but also avoids mechanical damage and emission deterioration. When this unqualified electronic throttle body is used, it may cause the automotive fuel to not burn fully due to insufficient air, resulting in carbon deposits accumulating on the throttle valve or the intake manifold. Therefore, it is also unqualified.

[0047] Through the above technical solution, when the hybrid vehicle electronic throttle body airtightness detection device provided by the present disclosure is in use, when the swing arm 342 rotates upward, it pulls the steel cable 360, causing the steel cable 360 to pull the slider 372 to move. At this time, the displacement spring 373 is compressed, and the rack 371 moves to the path of the differentiating gear 310, so that when the differentiating gear 310 passes by, it meshes with the rack 371, thereby driving the lead screw shaft 31 to rotate and changing the position of the moving sliding block 40, realizing the change of the end position of the mounting bracket 410 when the detection is completed, directly differentiating the detection results of the electronic throttle bodies in different situations through the position of the mounting bracket 410, and subdividing the airtightness detection results into three categories: excessive air leakage, normal, and too little air leakage, which is more accurate than the traditional single qualified / unqualified determination.

[0048] It should be noted that the electric lead screw stage 10 and the mechanical lead screw stage 30 are both prior arts.

[0049] In some embodiments, in the implementation manner where an indicating assembly is connected to the air chamber housing 110 to drive the indicating rod 460 to move laterally after the throttle body is inflated to observe the inflation effect and air retention effect, refer to Figures 7 - 8 As shown in, the indicating assembly includes a moving seat 430 slidably mounted on the mounting frame 410. A clamping platform 440 and an end plate 450 are provided on the moving seat 430. An indicating spring 470 is connected to the end plate 450. The indicating spring 470 is sleeved outside the indicating rod 460. The indicating assembly further includes an airbag column 120 connected to the air chamber housing 110. The airbag column 120 abuts against the ear plate 420 away from the indicating rod 460.

[0050] The airbag column 120 is provided as a column with folded airbags at its end. Airbag columns 120 are provided on the sides of both sealing plugs 50. The two airbag columns 120 abut against the side of the ear plate 420. After inflation, the airbag column 120 expands and extends, pushing the end plate 450 to move, thereby overcoming the force of the indicating spring 470 and driving the indicating rod 460 to move. When retaining air, since the vent hole 51 is opened, plus the resilience pressure of the indicating spring 470, it prompts the internal gas to escape outward.

[0051] In some other implementation manners, in the implementation manner where an indicating assembly is connected to the air chamber housing 110 to drive the indicating rod 460 to move laterally after the throttle body is inflated to observe the inflation effect and air retention effect, refer to Figure 9 As shown in, the indicating assembly includes a pneumatic telescopic rod 130 connected to the air chamber housing 110. The indicating rod 460 is fixedly connected to the other end of the pneumatic telescopic rod 130. An indicating spring 470 is sleeved outside the pneumatic telescopic rod 130. One end of the indicating spring 470 is connected to the end of the pneumatic telescopic rod 130.

[0052] The pneumatic telescopic rod 130 is provided as a combination of an air column and a sleeve. After inflation, the air column pushes outwards, thereby driving the indicating rod 460 to move outwards, overcoming the force of the indicating spring 470. When retaining air, since the vent hole 51 is opened, plus the resilience pressure of the indicating spring 470, it prompts the internal gas to escape outward.

[0053] In some implementation manners of the present disclosure, refer to Figures 1 - 6As shown in the figure, an air vent 51 is provided on the sealing plug 50. A sliding plug plate 510 for blocking the air vent 51 is slidably mounted on the sealing plug 50. A linkage rod 520 is detachably connected to the other side of the sliding plug plate 510. A rod hole 540 is provided on the ear plate 420. The linkage rod 520 passes through the rod hole 540. A stroke spring 530 is sleeved on the linkage rod 520. A stroke ball 550 is fixedly mounted at the end of the linkage rod 520. The stroke spring 530 is located between the ear plate 420 and the stroke ball 550. A stroke plate 560 is provided on the side of the electric screw rod slide 10. A first sliding surface 570 and a second sliding surface 580 are provided on the side of the stroke plate 560 adjacent to the stroke ball 550. The stroke ball 550 intermittently slides with the first sliding surface 570 and the second sliding surface 580.

[0054] Among them, the first sliding surface 570 has two sections and is respectively located on both sides of the second sliding surface 580. The distance between the second sliding surface 580 and the adjacent ear plate 420 is smaller than the distance between the first sliding surface 570 and the adjacent ear plate 420. The first sliding surface 570 and the second sliding surface 580 are connected by a chamfered inclined surface.

[0055] Specifically, the linkage rod 520 is detachably connected to the end of the sliding plug plate 510, which can be a snap connection or a bolt connection.

[0056] Through the above technical solution, when the airtightness detection device for the electronic throttle body of a hybrid vehicle provided by the present disclosure is in use, when the operator installs the sealing plug 50 on both sides of the electronic throttle body, the air vent 51 is opened to ensure that the air pressure inside the throttle body is balanced with the ambient air pressure when the sealing plug 50 is installed, eliminating the interference of the initial pressure difference on the detection result and ensuring the detection consistency.

[0057] When the electric screw rod slide 10 is started and the electronic throttle body is started at the same time, the throttle valve plate opens for intake. The stroke ball 550 slides along the first sliding surface 570 to the second sliding surface 580, causing the stroke spring 530 to be compressed and the linkage rod 520 to move, thereby driving the sliding plug plate 510 to block the air vent 51, realizing automatic blocking and ensuring an airtight environment for inflation.

[0058] When the stroke ball 550 moves to the second section of the first sliding surface 570, the valve plate of the electronic throttle body rotates to the idle state, the stroke spring 530 rebounds, and the air vent 51 is opened again. At this time, the air retention effect of the throttle body is detected.

[0059] When the sealing plug 50 is installed, the internal and external air pressures are immediately balanced through the air vent 51, and the initial pressure difference is eliminated as much as possible, so that all the measured parts start to be detected under the zero pressure difference state, improving the detection accuracy. Through dynamic pressure balance, automatic blocking linkage and real working condition simulation, diversified and automated detection significantly improves the detection accuracy, efficiency and safety.

[0060] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0061] In addition, it should be noted that, in the various specific technical features described in the above specific embodiments, they can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination manners.

[0062] Furthermore, any combination can be made between various different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. An airtightness detection device for the electronic throttle body of a hybrid vehicle, comprising two sealing plugs (50) for blocking both sides of the throttle body, characterized in that: It further includes an electric lead screw slide table (10), on which an installation frame (410) is movably arranged. Ear plates (420) are arranged on both sides of the installation frame (410), and an indicating rod (460) is slidably inserted into the ear plates (420). Both sides of the sealing plug (50) are connected to an air chamber shell (110), and the air chamber shell (110) is connected to an indicating assembly for driving the indicating rod (460) to move horizontally after the throttle body is inflated to observe the inflation effect and air retention effect; After the electronic valve plate rotates and opens for inflation, if the indicating rod (460) takes too long to move to the target position, the rotation angle of the electronic throttle body valve plate is unqualified.

2. The airtightness detection device for the electronic throttle body of a hybrid vehicle according to claim 1, wherein: An air vent (51) is formed on the sealing plug (50), and a sliding plug plate (510) for blocking the air vent (51) is slidably installed on the sealing plug (50). A linkage rod (520) is detachably connected to the other side of the sliding plug plate (510). A rod hole (540) is formed on the ear plate (420), and the linkage rod (520) passes through the rod hole (540). A travel spring (530) is sleeved on the linkage rod (520). A travel ball (550) is fixedly installed at the end of the linkage rod (520). The travel spring (530) is located between the ear plate (420) and the travel ball (550). A travel plate (560) is arranged on the side of the electric lead screw slide table (10). A first sliding surface (570) and a second sliding surface (580) are arranged on the side of the travel plate (560) adjacent to the travel ball (550). The travel ball (550) intermittently slides on the first sliding surface (570) and the second sliding surface (580).

3. An airtightness detection device for an electronic throttle body of a hybrid vehicle according to claim 2, characterized in that: The first sliding surface (570) has two sections and is respectively located on both sides of the second sliding surface (580). The distance between the second sliding surface (580) and the adjacent ear plate (420) is smaller than the distance between the first sliding surface (570) and the adjacent ear plate (420). The first sliding surface (570) and the second sliding surface (580) are connected by a chamfered inclined surface.

4. The airtightness detection device for the electronic throttle body of a hybrid vehicle according to claim 1, characterized in that: The indicating assembly includes a moving seat (430) slidably installed on the installation frame (410). A clamping platform (440) and an end plate (450) are arranged on the moving seat (430). An indicating spring (470) is connected to the end plate (450), and the indicating spring (470) is sleeved outside the indicating rod (460). The indicating assembly further includes an airbag column (120) connected to the air chamber shell (110), and the airbag column (120) abuts against the ear plate (420) far from the indicating rod (460).

5. The airtightness detection device for the electronic throttle body of a hybrid vehicle according to claim 1, characterized in that: The indicating assembly includes a pneumatic telescopic rod (130) connected to the air chamber shell (110). The indicating rod (460) is fixedly connected to the other end of the pneumatic telescopic rod (130). An indicating spring (470) is sleeved outside the pneumatic telescopic rod (130), and one end of the indicating spring (470) is connected to the end of the pneumatic telescopic rod (130).

6. The airtightness detection device for the electronic throttle body of a hybrid vehicle according to claim 4 or claim 5, characterized in that: An electric screw slide (10) is equipped with an electric sliding block (20), a mechanical screw slide (30) is installed on the electric sliding block (20), a moving sliding block (40) is assembled on the mechanical screw slide (30), and a placement frame (410) is fixedly installed on the moving sliding block (40).

7. An airtightness detection device for an electronic throttle body of a hybrid vehicle according to claim 6, characterized in that: The mechanical screw slide (30) includes a screw shaft (31) rotatably installed, a distinguishing gear (310) is fixedly installed at the end of the screw shaft (31), a vertical plate (320) is arranged on the side of the electric screw slide (10), a rack (371) is slidably arranged on the side of the vertical plate (320), a fixed rod (330) is fixedly installed on the vertical plate (320), a differentiator (340) is arranged on the fixed rod (330), and the differentiator (340) is in transmission cooperation with the rack (371); When the indicating rod (460) touches the differentiator (340), the rack (371) slides, so that the distinguishing gear (310) meshes with the rack (371), changing the position of the electronic throttle body when it reaches the end point.

8. An airtightness detection device for an electronic throttle body of a hybrid vehicle according to claim 7, characterized in that: The differentiator (340) includes a handle (341) fixedly installed on the fixed rod (330), the handle (341) is hinged with a rotating arm (342), a tension spring (343) is connected between the handle (341) and the rotating arm (342), and a damping part (344) is jointly arranged on the handle (341) and the rotating arm (342).

9. An airtightness detection device for an electronic throttle body of a hybrid vehicle according to claim 8, characterized in that: A displacement table (370) is installed on the side of the vertical plate (320), a slider (372) is slidably installed on the displacement table (370), the slider (372) is fixedly connected with the rack (371), a rope hole (374) is opened on the displacement table (370), a steel cable (360) is connected to the side of the slider (372), the steel cable (360) passes through the rope hole (374), a rope groove (321) is opened on the side of the vertical plate (320), a guide wheel (322) is installed on the side of the rope groove (321), a deflecting wheel (350) is arranged on the side of the vertical plate (320), and the other end of the steel cable (360) passes through the rope groove (321), passes through the guide wheel (322) and the deflecting wheel (350), and is fixedly connected with the rotating arm (342).

10. An airtightness detection device for an electronic throttle body of a hybrid vehicle according to claim 9, characterized in that: Three groups of the differentiator (340), the displacement table (370), the steel cable (360) and the deflecting wheel (350) are correspondingly arranged, and the three differentiators (340) are arranged side by side.

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