Test apparatus for fuel injection quantity regulator

Abstract

This invention relates to the technical field of testing devices, and particularly to a testing device for a fuel injection quantity regulator, comprising: a test platform, on the upper surface of which are respectively provided a power box for driving the rotation of the regulator's power shaft and a drive mechanism for movement adjustment; a positioning plate for positioning the regulator is mounted on the drive mechanism, and the upper surface of the positioning plate is adapted to the bottom structure of the regulator; this invention achieves automated positioning, movement, and power connection of the regulator through simple semi-automatic control, significantly reducing manual operation, improving not only the efficiency of the regulator during installation and testing, but also enhancing the accuracy of the regulator after assembly and positioning. It solves the problems of time and labor consumption caused by manually tightening a large number of bolts one by one, inconvenient installation in some structural positions, and low positioning accuracy due to various human factors.

Description

Technical Field

[0001] This invention belongs to the field of testing device technology, specifically a testing device for fuel injection quantity regulators. Background Technology

[0002] The fuel injection quantity regulator is a core precision component in the engine fuel supply system. Its fuel injection quantity control accuracy directly determines the engine's power performance, fuel economy, and exhaust emission indicators. Currently, the fuel injection quantity regulator testing devices used in the industry still mainly rely on manual operation in core aspects such as regulator installation and positioning, position movement, and drive shaft docking.

[0003] In manual operation mode, operators must manually and precisely place the fuel injection quantity regulator on the test station, manually adjusting its horizontal position and height angle to ensure alignment with the power output structure of the test device. This entire positioning process is time-consuming and labor-intensive, and the positioning accuracy is easily affected by various human factors, which not only affects the accuracy of subsequent fuel injection quantity test data but can also damage the regulator's power shaft or test device components due to improper positioning, increasing production costs. Secondly, in the fixing and power connection between the regulator and the test device, existing devices generally use multiple sets of bolts for individual tightening. Due to limited installation space for the fuel injection quantity regulator and the concealed installation locations of some bolts, manual tightening is inconvenient, and the tightness of the bolts is difficult to maintain consistently, easily leading to insecure tightening. During testing, equipment vibration can cause the regulator to loosen, thus affecting test stability.

[0004] Therefore, the existing injectors need to be improved. Summary of the Invention

[0005] To overcome the shortcomings of existing technologies, the present invention proposes a testing device for fuel injection quantity regulators, which is mainly used to solve the problems of poor positioning accuracy, easy damage to the regulator's power shaft or testing device components, and time-consuming and labor-intensive problems caused by human operation during the assembly and positioning process of existing fuel injection quantity regulator testing devices.

[0006] This invention discloses a testing device for a fuel injection quantity regulator, comprising: The test bench has a power box for driving the power shaft of the regulator to rotate and a drive mechanism for moving and adjusting, respectively, on its upper surface. The drive mechanism is equipped with a positioning plate for positioning the regulator, and the upper surface of the positioning plate is adapted to the bottom structure of the regulator. A fixed plate is fixedly connected to the end of the power output shaft of the power box. A limiting sleeve for inserting the power shaft of the regulator is fixedly connected to one end of the fixed plate opposite to the power box. A limiting groove is opened on the top outer wall of the limiting sleeve located on the vertical line, and a first locking block for locking the keyway on the power shaft of the regulator is slidably connected in the limiting groove. The drive mechanism includes two support plates fixedly connected to the top of the test bench. Two guide rods are fixedly connected between the two support plates. A first electric push rod is fixedly connected to the end of the test bench away from the power box. The output shaft end of the first electric push rod passes through and is connected to the adjacent support plate and is fixedly connected to the bottom of the positioning plate. The bottom of the positioning plate is provided with multiple symmetrical protrusions, which are respectively slidably connected to two guide rods. A first limiting plate and a second limiting plate are respectively provided between the positioning plate and the power box for connecting the regulator. Both the first and second limiting plates have through slots at their centers to facilitate the passage of the regulator's power shaft. The first limiting plate is fitted to one side of the regulator's mounting hole and also has three positioning holes corresponding to the regulator's mounting hole. The second limiting plate is fixedly connected to the power box, and three limiting blocks adapted to the positioning holes are fixedly connected to the side of the second limiting plate opposite to the first limiting plate. These limiting blocks are positioned relative to the regulator... A positioning shaft for passing through the regulator mounting hole is fixedly connected to the center of one side, and the length of the positioning shaft is greater than the sum of the thickness of the first limiting plate and the mounting hole. A positioning keyway is opened at one end of the positioning shaft extending out of the mounting hole. A support frame is fixedly connected to the bottom of the test platform near the second limiting plate, and a second electric push rod is fixedly connected to the support frame. The output shaft of the second electric push rod passes through the support frame and is fixedly connected to a three-pronged plate that matches the width of the positioning keyway. The top of the three-pronged plate passes through the test platform and is slidably connected to the test platform. U-shaped grooves that match the three positioning keyways are opened at the three top ends of the three-pronged plate, and the U-shaped grooves are located directly below the maximum movement point of the positioning keyway.

[0007] Furthermore, a test plate is fixedly connected to one side of the positioning plate. The test plate has multiple observation slots on the side opposite to the regulator, and each observation slot is equipped with a test tube. Multiple oil injection ports at the top of the regulator are connected to oil guide pipes. The other end of the oil guide pipes is fixedly connected to the test plate and corresponds to the top of the multiple test tubes.

[0008] Furthermore, the three top ends of the trident plate have inwardly inclined surfaces on one side relative to the positioning disk.

[0009] Furthermore, two symmetrical rubber blocks are fixedly connected to the outer surface of the positioning shaft, and the sum of the volumes of the positioning shaft and the two rubber blocks is adapted to the inner wall volume of the positioning hole.

[0010] Furthermore, the ends of the two rubber blocks away from the limiting block extend outward to form positioning holes, and the three top ends of the trident plate have inward inclined surfaces on the side opposite to the first limiting plate, and the bottom end of the inclined surface is on the same vertical plane as the outer surface of the adjuster mounting hole.

[0011] Furthermore, the rubber block is provided with multiple air chambers.

[0012] Furthermore, an adjustment mechanism for adjusting the angle of the keyway on the power shaft of the regulator is provided on the side of the first limiting plate opposite to the second limiting plate. The adjustment mechanism includes a fixed ring concentrically fixed on the side of the first limiting plate opposite to the second limiting plate. A rotating ring is rotatably connected to the inner wall of the fixed ring. A fixed block is fixedly connected to the inner wall of the rotating ring, and one end of the fixed block is in contact with the inner wall of the first limiting plate. A threaded rod is provided through the center of the fixed block, and the threaded rod is threadedly connected to the fixed block. A second locking block for engaging the keyway on the power shaft of the regulator is rotatably connected to the end of the threaded rod near the center of the first limiting plate. A rotary wrench is fixedly connected to the end of the threaded rod away from the center of the first limiting plate. A vertically upward strip groove is provided on the second limiting plate.

[0013] Furthermore, an annular groove is formed on one side of the first limiting plate opposite to the second limiting plate, and the inner contour of the annular groove coincides with the outer contour of the fixed ring. Two eccentric limiting holes are symmetrically formed on the inner wall of the annular groove at the top of the perpendicular bisector. Each of the two limiting holes is slidably connected to a limiting shaft. Two connecting grooves corresponding to the limiting holes are formed on one side of the first limiting plate opposite to the second limiting plate, and these connecting grooves communicate with the limiting holes. The two limiting holes and connecting grooves are symmetrically distributed along the perpendicular bisector of the power shaft, and the distance between the two connecting grooves matches the distance between the two ends of the fixed block. A stop block is slidably connected within the connecting groove, and a limiting groove is formed on the outer wall of the stop block on one side opposite to the limiting shaft. The limiting groove is directly opposite one end of the limiting shaft and the bottom end of the limiting shaft. The device has parallel inclined surfaces. The bottom end of the limiting shaft is inserted into the limiting groove and is slidably connected to the inclined surface at one end of the limiting groove. The end of the stop block away from the second limiting plate is fixedly connected to the inner wall of the connecting groove with a spring. The end of the stop block near the second limiting plate extends outward from the connecting groove, and the length of the end of the stop block extending out of the connecting groove is less than the maximum moving distance of the stop block. A connecting block is fixedly connected to the outer wall of the rotating ring at the location corresponding to the fixed block. A horizontally set pressure block is fixedly connected to the side of the connecting block opposite to the annular groove, and the midpoint of the lower surface of the pressure block is slidably connected to the inner wall of the annular groove near the center. The distance between the two ends of the pressure block is greater than the distance between the two ends of the fixed block. The limiting shaft and the center of the annular groove are set to not intersect and are inclined outward.

[0014] Furthermore, the end of the limiting groove away from the inclined surface is configured to be connected to the outside.

[0015] Furthermore, a limiting sleeve block is fixedly connected to the top of the limiting sleeve, and the inner hole of the limiting sleeve block is adapted to the upper limiting groove of the limiting sleeve. The top of the first locking block penetrates through the inner hole of the limiting sleeve block and extends outward. The first locking block and the limiting sleeve block are respectively provided with adapted through holes, and limiting screws are installed inside the through holes on the first locking block and the limiting sleeve block.

[0016] The present invention has the following beneficial effects: 1. This invention achieves automated positioning, movement, and power connection of the regulator through semi-automatic control, significantly reducing manual operation. This not only improves the efficiency of the regulator during installation and testing but also enhances the accuracy of the regulator after assembly and positioning. It solves the problems of time-consuming and labor-intensive manual installation requiring numerous bolts for individual fastening, inconvenient installation in certain structural positions, and low positioning accuracy due to various human factors. Furthermore, the first and second limit plates and the regulator can be tightly connected without requiring numerous bolts, improving operational efficiency while ensuring stability during regulator testing.

[0017] 2. In this invention, the rapid rotation of the regulator's power shaft can be achieved through an adjustment mechanism. Specifically, the rotational connection between the rotating ring and the fixed ring is utilized. A hand-held rotary wrench pushes the threaded rod and the fixed block to rotate, thereby causing the rotating ring, which is fixedly connected to the fixed block, to rotate. When the rotating ring rotates to a suitable angle, the second locking block, rotatably connected to the bottom end of the threaded rod, aligns with the keyway on the regulator's power shaft. Rotating the rotary wrench causes the threaded rod to spiral downwards on the fixed block, pushing the second locking block closer to the keyway on the power shaft. The insertion angle of the fixed block can be adjusted according to the actual required angle. With the continuous rotation of the rotary wrench, the second locking block is finally inserted into the keyway on the power shaft, completing the connection between the second locking block and the power shaft. Finally, by rotating the rotating ring according to the angle of the first locking block, the keyway on the power shaft is aligned with the first locking block. After the keyway on the power shaft is aligned with the first locking block, the rotary wrench is rotated in the opposite direction to raise the threaded rod, causing the second locking block to disengage from the keyway on the power shaft and move upward along the vertically upward strip groove on the second limit plate. This facilitates the subsequent movement of the adjuster towards the first locking block to continue the engagement between the keyway on the power shaft and the first locking block.

[0018] 3. In this invention, two symmetrical connecting grooves and limiting holes are set along the vertical line of the power shaft, and the distance between the two connecting grooves is adapted to the distance between the two ends of the fixing block. When the fixing block moves between the two connecting grooves, it cooperates with the stop block that is slidably connected in the connecting groove to achieve the effect of resisting and limiting the fixing block. This ensures that the threaded rod and the fixing block are located directly above the vertical line of the keyway of the power shaft, which facilitates the precise docking of the keyway on the power shaft with the first locking block. The specific operation is as follows: by rotating the rotary wrench, the fixed block is driven to rotate synchronously. During this time, the fixed block can approach one of the two stops from any direction as needed. When the fixed block approaches one of the stops, because the distance between the two ends of the pressure block is greater than the distance between the two ends of the fixed block, the connecting block corresponding to the fixed block will drive the pressure block to press down on the top of the limiting shaft in the annular groove in advance, so that the limiting shaft slides along the limiting hole into the connecting groove. During this time, the bottom end of the limiting shaft always fits against the inclined surface of one end of the connecting limiting groove slide, and moves towards the bottom end of the inclined surface of the limiting groove slide during the downward sliding process, thereby pushing the stop compression spring to move into the connecting groove. This ensures that when the fixed block moves to the stop, the end of the stop that originally protruded from the connecting groove has completely retracted into the connecting groove, achieving the effect of facilitating the movement of the fixed block across one of the connecting grooves. Because the center of the limiting shaft and the annular groove are set to not intersect and are tilted outwards, when the fixed block passes the first stop, the pressure block can no longer squeeze the other limiting shaft to descend, and the two do not contact each other. The fixed block will be blocked by the other stop. Since the distance between the two connecting grooves is adapted to the distance between the two ends of the fixed block, and the two limiting holes and connecting grooves are symmetrically distributed along the vertical line of the power shaft, the ends of the two stops extending from the connecting grooves form a blocking effect on both ends of the fixed block that have rotated to the vertical line. This improves the adjustment accuracy of the keyway on the power shaft, facilitates accurate engagement between the keyway and the first locking block, and improves the adjustment accuracy of the keyway on the power shaft. When one end of the fixed block is attached to the outer wall of the other stop, the limiting shaft that was originally squeezed loses the pressure of the pressure block. At this time, the spring pushes the stop to reset under the action of elasticity, and the inclined surface of the limiting groove slide drives the limiting shaft to reset. At this time, the threaded rod is located at the midpoint between the two stops, which is the top of the vertical line of the power shaft. This ensures that the keyway on the second locking block drives the power shaft to be precisely in the same plane as the first locking block after adjustment, achieving a precise docking effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the test bench near the power box in this invention; Figure 3 This is a schematic diagram of the structure at the second limiting plate in this invention; Figure 4 This is a schematic diagram of the three-pronged plate in this invention; Figure 5This is a schematic diagram of the structure of the test plate, test stage and first limiting plate in this invention; Figure 6 This is a schematic diagram of the structure of the test plate, positioning disk, and first limiting plate in this invention; Figure 7 This is the present invention. Figure 7 Enlarged structural diagram of area C; Figure 8 This is a schematic diagram of the structure of the rubber block in this invention; Figure 9 This is a schematic diagram of the structure of the first limiting plate near the threaded rod in this invention; Figure 10 This is a schematic diagram of the structure after the first limiting plate and the second limiting plate are snapped together in this invention; Figure 11 This is the present invention. Figure 10 A magnified structural diagram of region B in the middle; Figure 12 This is a cross-sectional view of the first limiting plate and the second limiting plate in this invention; Figure 13 This is the present invention. Figure 12 Enlarged structural diagram of area A in the middle; Figure 14 This is a schematic diagram of the bottom structure of the limiting sleeve in this invention.

[0020] In the diagram: 1. Test bench; 11. Power box; 12. Fixed plate; 13. Limiting sleeve; 14. First locking block; 15. Limiting sleeve block; 16. Limiting screw; 2. Positioning plate; 21. First limiting plate; 22. Second limiting plate; 23. Limiting block; 24. Positioning shaft; 25. Positioning keyway; 26. Rubber block; 27. Tripod plate; 28. Support frame; 29. ​​Second electric push rod; 3. Drive mechanism; 31. Guide rod; 32. Support Support plate; 33. First electric push rod; 4. Adjustment mechanism; 41. Fixed ring; 411. Rotating ring; 412. Fixed block; 413. Threaded rod; 414. Second locking block; 415. Rotary wrench; 42. Annular groove; 43. Limiting hole; 44. Limiting shaft; 45. Connecting groove; 46. Stop block; 461. Slide groove; 47. Spring; 48. Connecting block; 49. Pressure block; 5. Test plate; 51. Test tube; 52. Oil guide tube. Detailed Implementation

[0021] To make the technical means, creative features, objectives, and effects of this invention easier to understand, the following is a summary... Figures 1 to 14 The invention will be further described below, along with specific implementation methods.

[0022] Example 1 A testing device for a fuel injection quantity regulator includes a test bench 1. The upper surface of the test bench 1 is respectively provided with a power box 11 for driving the regulator's power shaft to rotate and a drive mechanism 3 for moving and adjusting. A positioning plate 2 for positioning the regulator is mounted on the drive mechanism 3, and the upper surface of the positioning plate 2 is adapted to the bottom structure of the regulator. A fixed plate 12 is fixedly connected to the end of the power output shaft of the power box 11. A limiting sleeve 13 for inserting the regulator's power shaft is fixedly connected to one end of the fixed plate 12 opposite to the power box 11. A limiting groove is formed on the top outer wall of the limiting sleeve 13 located on the vertical axis, and a first locking block 14 for locking the keyway on the regulator's power shaft is slidably connected within the limiting groove.

[0023] The drive mechanism 3 includes two support plates 32 fixedly connected to the top of the test bench 1. Two guide rods 31 are fixedly connected between the two support plates 32. A first electric push rod 33 is fixedly connected to the end of the test bench 1 away from the power box 11. The output shaft end of the first electric push rod 33 passes through and connects to the adjacent support plate 32, and is fixedly connected to the bottom of the positioning plate 2.

[0024] The bottom of the positioning plate 2 is provided with multiple symmetrical protrusions, which are respectively slidably connected to two guide rods 31. A first limiting plate 21 and a second limiting plate 22 for connecting the regulator are respectively provided between the positioning plate 2 and the power box 11. Both the first limiting plate 21 and the second limiting plate 22 have through slots in their centers to facilitate the passage of the regulator's power shaft. The first limiting plate 21 is fitted to one side of the regulator's mounting hole. Simultaneously, the first limiting plate 21 also has three positioning holes corresponding to the regulator's mounting hole. The second limiting plate 22 is fixedly connected to the power box 11, and three limiting blocks 23 adapted to the positioning holes are fixedly connected to the side of the second limiting plate 22 facing the first limiting plate 21. A positioning shaft 24 for passing through the regulator's mounting hole is fixedly connected to the center of one side of the limiting block 23. The length of the positioning shaft 24 is greater than the sum of the thicknesses of the first limiting plate 21 and the mounting hole. A positioning keyway 25 is provided at the end of the positioning shaft 24 extending out of the mounting hole. A support frame 28 is fixedly connected to the bottom of the test bench 1 near the second limiting plate 22. A second electric push rod 29 is fixedly connected to the support frame 28. The output shaft of the second electric push rod 29 passes through the support frame 28 and is fixedly connected to a three-pronged plate 27 that matches the width of the positioning keyway 25. The top of the three-pronged plate 27 passes through and is slidably connected to the test bench 1. Each of the three top ends of the three-pronged plate 27 has a U-shaped groove that matches the three positioning keyways 25. The U-shaped grooves are located directly below the maximum movement point of the positioning keyway 25. The upper surface of the positioning disc 2 is adapted to the bottom structure of the adjuster. First, the bottom of the adjuster is aligned with the upper surface of the first limiting plate 21 and snapped onto the first limiting plate 21. Then, the first limiting plate 21 is pushed to slide on the guide rod 31 and fit against the surface connected to the mounting hole side of the adjuster. The keyway angle of the camshaft is adjusted and the first electric push rod 33 in the drive mechanism 3 is activated. The output shaft of the first electric push rod 33 pushes the positioning disc 2 to move the adjuster and the first limiting plate 21 toward the second limiting plate 22, so that the three limiting blocks 23 on the second limiting plate 22 can be accurately snapped into the three positioning holes on the first limiting plate 21, achieving the initial snapping effect of the first limiting plate 21 and the second limiting plate 22. At the same time, the positioning shaft 24, which is fixedly connected to the limiting block 23, passes through the positioning hole on the first limiting plate 21 and the mounting hole on the adjuster in sequence, and extends part of its end outside the mounting hole. The second electric push rod 29 is activated, and its output shaft is pushed upward on the three-pronged plate 27 under the guidance of the support frame 28. The limiting sliding connection formed between the trident plate 27 and the test platform 1 can further improve its upward stability. When the trident plate 27 rises to the designated position, the U-shaped grooves on its three top ends respectively engage with the positioning keyways 25 on the protruding ends of the three positioning shafts 24, thereby achieving axial limiting between the first limiting plate 21, the second limiting plate 22 and the adjuster.During this period, the regulator's power shaft is inserted into the limiting sleeve 13. The first locking block 14 on the limiting sleeve 13 engages with the keyway on the regulator's power shaft, completing the axial connection between the regulator's power shaft and the power output shaft on the power box 11. This allows the power output shaft on the power box 11 to drive the regulator's power shaft to rotate synchronously, facilitating the device's testing of the regulator's fuel injection quantity. The above operations, largely through simple semi-automatic control, complete the automated positioning, movement, and power connection of the regulator, significantly reducing manual operation. This not only improves the efficiency of the regulator's installation and testing process but also enhances the accuracy of the regulator's assembly and positioning. It solves the problems of time-consuming and labor-intensive manual installation requiring numerous bolts for individual fastening, inconvenient installation in certain structural positions, and low positioning accuracy due to various human factors. Simultaneously, the first limiting plate 21, the second limiting plate 22, and the regulator can achieve a tight connection without requiring numerous bolts, improving operational efficiency while ensuring the stability of the regulator during testing.

[0025] A test plate 5 is fixedly connected to one side of the positioning plate 2. Multiple observation slots are provided on the side of the test plate 5 opposite to the regulator, and each observation slot contains a test tube 51. Multiple oil injection ports at the top of the regulator are connected to oil guide pipes 52. The other end of each oil guide pipe 52 is fixedly connected to the test plate 5 and corresponds to the top of the multiple test tubes 51. When the regulator's power shaft is inserted into the limiting sleeve 13 and engaged with the first locking block 14, the power output shaft on the test bench 1 drives the regulator's power shaft to rotate, causing the regulator to start working. During the regulator's operation, the oil injection ports at the top of the regulator spray oil from different oil chambers into the corresponding oil guide pipes 52, and the oil guide pipes 52 drip oil into the test tubes 51. Finally, the scale on the test tubes 51 is used to determine the degree of difference in oil volume sprayed from different injection ports and the regulator's adjustment accuracy for the oil volume under the regulator's control.

[0026] Example 2 As a further improvement to Example 1, such as Figure 1 , Figure 9 , Figure 10 and Figure 11As shown, the first limiting plate 21 facing the second limiting plate 22 is provided with an adjustment mechanism 4 for rotating the keyway angle on the power shaft of the regulator. The adjustment mechanism 4 includes a fixing ring 41 concentrically fixed to the side of the first limiting plate 21 facing the second limiting plate 22. A rotating ring 411 is rotatably connected to the inner wall of the fixing ring 41, and a fixing block 412 is fixedly connected to the inner wall of the rotating ring 411. One end of the fixing block 412 is in contact with the inner wall of the first limiting plate 21. A threaded rod 413 is threaded through the center of the fixing block 412, and the threaded rod 413 is threadedly connected to the fixing block 412. A second locking block 414 for engaging the keyway on the power shaft of the regulator is rotatably connected to the end of the threaded rod 413 near the center of the first limiting plate 21. A rotary wrench 415 is fixedly connected to the end of the threaded rod 413 away from the center of the first limiting plate 21. The second limiting plate 22 has a vertically upward-facing slot. When the regulator is installed and positioned, the keyway angle on its power shaft is not aligned with the first locking block 14. To facilitate quick and easy alignment of the connection angle between the two components and to solve the problem of difficulty and inconvenience in manually rotating the power shaft, the adjustment mechanism 4 enables rapid rotation of the power shaft. Specifically, the operation involves using the rotational connection between the rotating ring 411 and the fixed ring 41, holding a rotary wrench 415 to rotate the threaded rod 413 and the fixed block 412, thereby causing the rotating ring 411, which is fixedly connected to the fixed block 412, to rotate. When the rotating ring 411 rotates to the appropriate angle, the second locking block 414, rotatably connected to the bottom of the threaded rod 413, aligns with the keyway on the power shaft. At this point, rotating the rotary wrench 415 causes the threaded rod 413 to spiral downwards on the fixed block 412, pushing the second locking block 414 closer to the keyway on the power shaft. Then, by adjusting the insertion angle of the fixed block 412 according to the required angle, and with the continued rotation of the rotary wrench 415, the second locking block 414 is finally inserted into the keyway on the power shaft, completing the connection between the second locking block 414 and the power shaft. The rotating handle 415 is fixedly connected to the threaded rod 413, which passes through the center of the fixed block 412. The fixed block 412 is fixedly connected to the inner wall of the rotating ring 411. At this time, by manually gripping the rotating handle 415 and turning it around the circumference of the rotating ring 411, the angle of the keyway on the power shaft is adjusted so that it is on the same horizontal plane as the first locking block 14, facilitating accurate subsequent docking. After aligning the keyway on the power shaft with the first locking block 14, the rotating handle 415 is rotated in the opposite direction, causing the threaded rod 413 to rise, disengaging the second locking block 414 from the keyway on the power shaft. The second locking block 414 then moves upward along the vertically upward-facing slot on the second limiting plate 22, facilitating the subsequent movement of the adjuster towards the first locking block 14 to complete the engagement between the keyway on the power shaft and the first locking block 14.

[0027] like Figures 9-13As shown, the first limiting plate 21 has an annular groove 42 on one side opposite the second limiting plate 22, and the inner contour of the annular groove 42 coincides with the outer contour of the fixing ring 41. Two eccentric limiting holes 43 are symmetrically formed on the inner wall of the annular groove 42 at the top of the vertical axis, and each limiting hole 43 has a limiting shaft 44 that is slidably connected within it. Two connecting grooves 45 corresponding to the limiting holes 43 are formed on the side of the first limiting plate 21 facing the second limiting plate 22, and the connecting grooves 45 communicate with the limiting holes 43. The two limiting holes 43 and the connecting grooves 45 are symmetrically distributed along the vertical axis of the power shaft, and the distance between the two connecting grooves 45 matches the distance between the two ends of the fixing block 412. A stop 46 is slidably connected within the connecting groove 45. A limiting groove 461 is formed on the outer wall of the stop 46 on one side opposite the limiting shaft 44. The end of the limiting groove 461 facing the limiting shaft 44 and the bottom end of the limiting shaft 44 each have parallel inclined surfaces. The bottom end of the limiting shaft 44 is inserted into the limiting groove 461 and slidably connected to the inclined surface at one end of the limiting groove 461. A spring 47 is fixedly connected to the end of the stop 46 away from the second limiting plate 22 and the inner wall of the connecting groove 45. The end of the stop 46 near the second limiting plate 22 extends outward from the connecting groove 45, and the length of the end of the stop 46 extending out of the connecting groove 45 is less than the maximum moving distance of the stop 46. A connecting block 48 is fixedly connected to the outer wall of the rotating ring 411 at the location corresponding to the fixed block 412. A horizontally arranged pressure block 49 is fixedly connected to one side of the connecting block 48 opposite to the annular groove 42. The midpoint of the lower surface of the pressure block 49 is slidably connected to the inner wall of the annular groove 42 near the center. The distance between the two ends of the pressure block 49 is greater than the distance between the two ends of the fixed block 412. The limiting shaft 44 is set to not intersect with the center of the annular groove 42 and is inclined outward. In order to facilitate the fixed block 412 to enter the top position of the vertical line of the annular groove 42 on either side of the two stops 46, two connecting grooves 45 and limiting holes 43 are opened symmetrically along the vertical line of the power shaft and with appropriate spacing. When the fixed block 412 moves between the two connecting grooves 45, it cooperates with the stops 46 slidably connected in the connecting grooves 45 to achieve the effect of resisting and limiting the fixed block 412, ensuring that the threaded rod 413 and the fixed block 412 are directly above the vertical line of the keyway of the power shaft, thereby facilitating the precise docking of the keyway on the power shaft with the first locking block 14.The specific operation is as follows: by rotating the rotary wrench 415, the fixed block 412 is driven to rotate synchronously. During this process, the fixed block 412 can approach one of the two stop blocks 46 from either direction as needed. When the fixed block 412 approaches one of the stop blocks 46, because the distance between the two ends of the pressure block 49 is greater than the distance between the two ends of the fixed block 412, the connecting block 48 corresponding to the fixed block 412 will drive the pressure block 49 to press the top of the limiting shaft 44 in the annular groove 42 downward in advance, so that the limiting shaft 44 moves along the limiting direction. The hole 43 slides into the connecting groove 45. During this process, the bottom end of the limiting shaft 44 always adheres to the inclined surface of one end of the connecting limiting groove slide 461. As it slides downward, it moves towards the bottom end of the inclined surface of the limiting groove slide 461, pushing the stop block 46 to compress the spring 47 into the connecting groove 45. This ensures that when the fixed block 412 moves to the stop block 46, the end of the stop block 46 that originally extended out of the connecting groove 45 has completely retracted into the connecting groove 45, thus facilitating the movement of the fixed block 412 across one of the connecting grooves 45. Since the center of the limiting shaft 44 and the annular groove 42 are set to not intersect and are inclined outward, when the fixed block 412 passes the first stop block 46, the pressure block 49 can no longer compress the other limiting shaft 44 to descend. The two do not contact each other, and the fixed block 412 will be blocked by the other stop block 46. Through two matching limiting holes 43 and connecting grooves 45 symmetrically distributed along the vertical line of the power shaft, when the ends of the two blocks 46 extending from the connecting grooves 45 block both ends of the fixed block 412 that has rotated to the vertical line, the positioning effect of the fixed block 412 is achieved, improving the adjustment accuracy of the keyway on the power shaft and facilitating accurate engagement between the keyway and the first locking block 11. When one end of the fixed block 412 is attached to the outer wall of the other block 46, the limiting shaft 44, which was originally compressed, is no longer compressed by the pressure block 49. At this time, the spring 47, under the elastic action, pushes the block 46 to reset, and the inclined surface of the limiting groove slide 461 drives the limiting shaft 44 to reset. At this time, the threaded rod 413 is located at the midpoint between the two blocks 46, which is the top of the vertical line of the power shaft, ensuring that the keyway on the power shaft driven by the second locking block 414 is precisely in the same plane as the first locking block 14 after adjustment, achieving a precise docking effect.

[0028] like Figure 13 As shown, the end of the limiting groove 461 away from the inclined surface is connected to the outside, which can facilitate the cleaning of oil and foreign objects between the stop block 46 and the limiting shaft 44 during routine maintenance, and prevent oil and foreign objects from clogging the limiting groove 461, affecting the normal descent of the limiting shaft 44, squeezing the inclined surface of the limiting groove 461, and pushing the stop block 46 to retract and reset.

[0029] Example 3 As a further supplement to Example 1, such as Figure 1 and Figure 7As shown, the three top ends of the trident plate 27 have inward inclined surfaces on one side relative to the positioning disk 2. By having inward inclined surfaces on one side of the three top ends of the trident plate 27 relative to the positioning disk 2, the trident plate 27 can avoid the protruding structure on the upper part of the adjuster during the upward movement and accurately engage with the positioning keyway 25 on the positioning shaft 24, thereby achieving accurate positioning of the trident plate 27 on the positioning shaft 24.

[0030] like Figure 7 As shown, two symmetrical rubber blocks 26 are fixedly connected to the outer surface of the positioning shaft 24. The sum of the volumes of the positioning shaft 24 and the two rubber blocks 26 is adapted to the inner wall volume of the positioning hole. With the above arrangement, during the connection process of the second limiting plate 22, the second limiting plate 22 will drive the positioning shaft 24 and the rubber blocks 26, and simultaneously pass through the positioning hole on the first limiting plate 21 and insert into the regulator mounting hole to complete the positioning. Since the sum of the volumes of the positioning shaft 24 and the two rubber blocks 26 is adapted to the inner wall volume of the positioning hole, after the positioning shaft 24 and the rubber blocks 26 are inserted into the regulator mounting hole, and the positioning keyway 25 is engaged by the U-shaped groove on the three-pronged plate 27, the rubber blocks 26 can achieve the effect of buffering the vibration caused by the operation of the regulator under the continuous rotation of the regulator power shaft, thereby improving the positioning effect of the device on the adjusting machine. The symmetrically installed rubber blocks 26 on both sides ensure that the buffering and shock absorption effect can be achieved no matter which direction the regulator power shaft rotates. At the same time, when the trident plate 27 is not inserted into the positioning keyway 25, it can also provide a preliminary support and limiting effect for the positioning shaft 24 in the adjuster mounting hole, which facilitates the accurate insertion of the trident plate 27 into the positioning keyway 25 on the positioning shaft 24.

[0031] like Figure 3 and Figure 7 As shown, the ends of the two rubber blocks 26 furthest from the limiting block 23 both extend outwards with positioning holes. The three top ends of the trident plate 27 have inwardly sloping surfaces on the side opposite to the first limiting plate 21, and the bottom of the sloping surfaces is on the same vertical plane as the outer surface of the adjuster mounting hole. During the upward movement of the trident plate 27 and its U-shaped groove at the top end engaging with the positioning keyways 25 on the three positioning shafts 24, the sloping surfaces on the side of the trident plate 27 opposite to the first limiting plate 21 prevent collisions between its top end and the rubber blocks 26, thus avoiding interference with the engagement of the trident plate 27 with the positioning shafts 24. While facilitating quick engagement between the U-shaped groove on the trident plate 27 and the positioning keyways 25, the arrangement of the bottom of the sloping surfaces on the same vertical plane as the outer surface of the adjuster mounting hole allows the protruding rubber blocks 26 to be squeezed into the adjuster mounting hole, enabling the squeezed rubber blocks 26 to better fill the gaps in the mounting hole and thus improve the cushioning effect of the rubber blocks 26.

[0032] like Figure 8As shown, the rubber block 26 has multiple air chambers. When the rubber block 26 is compressed, the rubber will preferentially flow to the gaps around the air chambers. During the compression of the air chambers, the rubber material around them will be "pushed" to the unfilled areas of the cavity, such as corners and gaps. At the same time, the dispersed distribution of multiple air chambers can change the flow of rubber from "overall rigid pushing" to "multi-area flexible feeding", avoiding unidirectional flow of rubber material, achieving uniform filling of the cavity, improving the buffering effect of the rubber block 26 on the vibration of the regulator, improving the stability of the connection between the second limiting plate 22 and the first limiting plate 21, and enhancing the stability of the regulator and the first limiting plate 21 during the positioning process.

[0033] like Figure 14 As shown, a limiting sleeve block 15 is fixedly connected to the top of the limiting sleeve 13, and the inner hole of the limiting sleeve block 15 is adapted to the upper limiting groove of the limiting sleeve 13. The top of the first locking block 14 passes through the inner hole of the limiting sleeve block 15 and extends outward. The first locking block 14 and the limiting sleeve block 15 are respectively provided with adapted through holes. Limiting screws 16 are installed in the through holes of the first locking block 14 and the limiting sleeve block 15. By fixing the limiting sleeve block 15 to the top of the limiting sleeve 13, and by providing through holes on the limiting sleeve block 15 and the first locking block 14, and fixing them with limiting screws 16, after the keyway on the regulator power shaft is engaged with the first locking block 14, it can be prevented that the centrifugal force will throw the first locking block 14 out of the keyway on the regulator power shaft under the rapid rotation of the power output shaft of the test bench 1, thus improving the stability of the connection process between the first locking block 14 and the keyway on the regulator power shaft.

[0034] Working principle: During installation, the bottom of the adjuster is first aligned with the upper surface of the first limiting plate 21 and placed on the first limiting plate 21. The first limiting plate 21 is then pushed to slide on the guide rod 31 and fit against the surface of the adjustinger's mounting hole. Then, the keyway angle of the camshaft is adjusted, and the first electric push rod 33 in the drive mechanism 3 is activated. The output shaft of the first electric push rod 33 pushes the positioning plate 2, causing the adjuster and the first limiting plate 21 to move towards the second limiting plate 22. This allows the three limiting blocks 23 on the second limiting plate 22 to precisely engage with the three positioning holes on the first limiting plate 21, achieving a preliminary engagement between the first limiting plate 21 and the second limiting plate 22. The positioning shaft 24, fixedly connected to the limiting block 23, passes through the positioning hole on the first limiting plate 21 and the mounting hole on the adjuster, with a portion extending beyond the mounting hole. This controls the activation of the second electric push rod 29, whose output shaft, guided by the support frame 28, pushes the three-pronged plate 27 upwards. When the tripod plate 27 rises to the designated position, the U-shaped groove on its top end stably engages with the keyways 25 on the protruding ends of the three positioning shafts 24, achieving axial positioning between the first limiting plate 21, the second limiting plate 22, and the regulator. During this period, the regulator's power shaft is inserted into the limiting sleeve 13, and the first locking block 14 on the limiting sleeve 13 engages with the keyway on the regulator's power shaft, allowing the power output shaft on the power box 11 to drive the power shaft on the regulator to rotate together, facilitating the device to test the regulator's fuel injection quantity. The above operations are basically completed through simple semi-automatic control, achieving automated positioning, movement, and power connection of the regulator, significantly reducing manual operation. This not only improves the efficiency of the regulator during installation and testing but also enhances the accuracy of the regulator after assembly and positioning. It solves the problems of time-consuming and labor-intensive manual installation requiring the use of numerous bolts for individual tightening, inconvenient installation in some structural positions, and low positioning accuracy due to various human factors. Meanwhile, the first limiting plate 21, the second limiting plate 22, and the regulator can be tightly connected to each other without the need for a large number of bolts, which improves the operating efficiency while ensuring the stability of the regulator during the testing process.

[0035] After the first limiting plate 21 is pushed to fit against the surface of the regulator mounting hole, the adjustment mechanism 4 is used to ensure that the keyway angle on the regulator's power shaft is consistent with the first locking block 14. Specifically, the operation is as follows: utilizing the rotational connection between the rotating ring 411 and the fixed ring 41, the rotary wrench 415 is used to push the threaded rod 413 and the fixed block 412 to rotate, thereby causing the rotating ring 411, which is fixedly connected to the fixed block 412, to rotate. When the rotating ring 411 rotates to a suitable angle, the second locking block 414, rotatably connected to the bottom of the threaded rod 413, corresponds to the keyway on the regulator's power shaft. At this time, rotating the rotary wrench 415 causes the threaded rod 413 to spiral downwards on the fixed block 412, pushing the second locking block 414 closer to the keyway on the power shaft. Then, by adjusting the insertion angle of the fixed block 412 according to the actual required angle, and with the continuous rotation of the rotary wrench 415, the second locking block 414 is finally inserted into the keyway on the power shaft, thus completing the connection between the second locking block 414 and the power shaft. The handle 415 is fixedly connected to the threaded rod 413, which is connected through the center of the fixed block 412. The fixed block 412 is fixedly connected to the inner wall of the rotating ring 411. At this time, the handle 415 is manually driven to rotate along the rotating ring 411 to adjust the angle of the keyway on the power shaft so that it is on the same horizontal plane as the first locking block 14, which facilitates accurate subsequent docking. After the keyway on the power shaft is aligned with the first locking block 14, the handle 415 is rotated in the opposite direction to raise the threaded rod 413, causing the second locking block 414 to disengage from the keyway on the power shaft and move upward along the vertically upward strip groove on the second limiting plate 22, which facilitates the subsequent movement of the adjuster towards the first locking block 14 to continue the engagement between the keyway on the power shaft and the first locking block 14.

[0036] To further improve the accuracy of the adjustment mechanism 4 in adjusting the keyway on the power shaft and the first locking block 14, two symmetrical connecting slots 45 and a limiting hole 43 with appropriate spacing along the vertical line of the power shaft are provided. When the fixing block 412 moves between the two connecting slots 45, it cooperates with the stop block 46 that is slidably connected in the connecting slot 45 to achieve the effect of resisting and limiting the fixing block 412, ensuring that the threaded rod 413 and the fixing block 412 are located directly above the vertical line of the keyway on the power shaft, which facilitates the precise docking of the keyway on the power shaft and the first locking block 14 in the future. The specific operation is as follows: by rotating the rotary wrench 415, the fixed block 412 is driven to rotate synchronously. During this period, the fixed block 412 can approach one of the two stop blocks 46 from any direction as needed. When the fixed block 412 approaches one of the stop blocks 46, since the distance between the two ends of the pressure block 49 is greater than the distance between the two ends of the fixed block 412, the connecting block 48 corresponding to the fixed block 412 will drive the pressure block 49 to press the top of the limiting shaft 44 in the annular groove 42 downward in advance, so that the limiting shaft 44 slides along the limiting hole 43 into the connecting groove 45. During this period, the bottom end of the limiting shaft 44 always adheres to the inclined surface of one end of the connecting limiting groove 461, and moves towards the bottom end of the inclined surface of the limiting groove 461 during downward sliding. This pushes the stop block 46 to compress the spring 47 into the connecting groove 45, ensuring that when the fixed block 412 moves to the stop block 46, the end of the stop block 46 that originally extended out of the connecting groove 45 has completely retracted into the connecting groove 45, thus facilitating the movement of the fixed block 412 across one of the connecting grooves 45. Since the center of the limiting shaft 44 and the annular groove 42 are set to not intersect and are inclined outward, when the fixed block 412 passes the first stop block 46, the pressure block 49 can no longer compress the other limiting shaft 44 to descend, and the two do not contact each other. Therefore, the fixed block 412 will be blocked by the other stop block 46. By using two symmetrically distributed and appropriately spaced limiting holes 43 and connecting grooves 45 along the vertical axis of the power shaft, the ends of the two blocks 46 extending from the connecting grooves 45 block both ends of the fixed block 412 that has rotated to the vertical axis, improving the adjustment accuracy of the keyway on the power shaft and facilitating accurate engagement between the keyway and the first locking block 11. When one end of the fixed block 412 is in contact with the outer wall of the other block 46, the limiting shaft 44, which was originally compressed, is no longer compressed by the pressure block 49. Under the elastic action of the spring 47, the block 46 is pushed back to its original position, and the inclined surface of the limiting groove slide 461 drives the limiting shaft 44 to return to its original position. The threaded rod 413 is located at the midpoint between the two blocks 46, that is, at the top of the vertical axis of the power shaft, ensuring that the keyway on the power shaft driven by the second locking block 414 is precisely in the same plane as the first locking block 14 after adjustment, achieving a precise docking effect.

[0037] After the first locking block 14 is engaged with the keyway on the regulator's power shaft along the limiting sleeve 15 and the limiting groove, the operator uses bolts through the through holes on 14 and the limiting sleeve 15 to stably engage the first locking block 14 with the keyway on the power shaft. Subsequently, the power output shaft on the test bench 1 drives the regulator's power shaft to rotate, and the regulator begins to work. During the operation of the regulator, the oil injection port at the top of the regulator will spray oil from different oil chambers into the corresponding oil guide pipes 52, and use the oil guide pipes 52 to drip oil into the test tube 51. Finally, the scale results on the test tube 51 are used to determine the degree of difference in the amount of oil sprayed from different injection ports under the regulation of the regulator, as well as the regulator's adjustment accuracy for the amount of oil sprayed.

[0038] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A testing device for a fuel injection quantity regulator, comprising a test bench (1), characterized in that, The test bench (1) is provided with a drive mechanism (3) and a power box (11) for driving the power shaft of the regulator to rotate. The drive mechanism (3) is equipped with a positioning plate (2) for positioning the regulator. A first limiting plate (21) and a second limiting plate (22) for connecting the regulator are provided between the positioning plate (2) and the power box (11). Both the first limiting plate (21) and the second limiting plate (22) have through slots at their centers to facilitate the passage of the regulator's power shaft. The first limiting plate (21) has three positioning holes corresponding to the regulator's mounting holes, and the first limiting plate (21) is fitted to the side of the regulator with the mounting holes. The second limiting plate (22) is fixedly connected to the power box (11). Three limiting blocks (23) adapted to the positioning holes are fixedly connected to the side of the second limiting plate (22) facing the first limiting plate (21). A positioning shaft (24) is fixedly connected to the side of the limiting blocks (23) facing the regulator. One end of the positioning shaft (24) passes through the adjustment mounting hole, and a positioning keyway (25) is provided at the end extending out of the mounting hole; the test bench (1) is fixedly connected to a support frame (28), the support frame (28) is set at the bottom of the second limiting plate (22), the support frame (28) is fixedly connected to a second electric push rod (29), the output shaft of the second electric push rod (29) passes through the support frame (28) and is fixedly connected to a three-pronged plate (27), the top of the three-pronged plate (27) passes through the test bench (1) and moves back and forth under the drive of the second electric push rod (29), the top of the three-pronged plate (27) is respectively provided with three U-shaped grooves that are adapted to the positioning keyway (25), and the U-shaped grooves are located directly below the maximum movement point of the positioning keyway (25).

2. The testing device for a fuel injection quantity regulator according to claim 1, characterized in that, A test plate (5) is fixedly connected to one side of the positioning plate (2). The test plate (5) has multiple observation slots on the side opposite to the regulator, and test tubes (51) are installed in each observation slot. Multiple oil injection ports at the top of the regulator are connected to oil guide pipes (52). The other end of the oil guide pipes (52) is fixedly connected to the test plate (5) and corresponds to the top of the multiple test tubes (51). When the power shaft of the regulator is inserted into the limiting sleeve (13) and inserted into the first locking block (14).

3. The testing device for a fuel injection quantity regulator according to claim 1, characterized in that, The three tops of the trident plate (27) are provided with inclined surfaces on one side of the positioning plate (2) relative to the three tops.

4. The testing device for a fuel injection quantity regulator according to claim 1, characterized in that, Two symmetrical rubber blocks (26) are fixedly connected to the outer surface of the positioning shaft (24), and the sum of the volumes of the positioning shaft (24) and the two rubber blocks (26) is adapted to the volume of the positioning hole.

5. The testing device for a fuel injection quantity regulator according to claim 4, characterized in that, The two rubber blocks (26) extend outward from the end away from the limiting block (23) to form positioning holes. The three top ends of the trident plate (27) are provided with inclined surfaces on the side opposite to the first limiting plate (21), and the bottom end of the inclined surfaces is on the same vertical plane as the outer surface of the regulator mounting hole.

6. The testing apparatus for a fuel injection quantity regulator according to claim 4, characterized in that, The rubber block (26) has multiple air chambers inside.

7. The testing device for a fuel injection quantity regulator according to claim 1, characterized in that: The first limiting plate (21) is provided with an adjustment mechanism (4) for adjusting the angle of the keyway on the power shaft of the rotating adjuster on the side facing the second limiting plate (22). The adjustment mechanism (4) includes a fixing ring (41) concentrically fixed on the side of the first limiting plate (21) facing the second limiting plate (22). A rotating ring (411) is rotatably connected to the inner wall of the fixing ring (411). A fixing block (412) is fixedly connected to the inner wall of the rotating ring (411). One end of the fixing block (412) is attached to the inner wall of the first limiting plate (21). The fixed block (412) is connected in a closed manner, and a threaded rod (413) is provided through the center of the fixed block (412). The threaded rod (413) is threadedly connected to the fixed block (412). The end of the threaded rod (413) near the center of the first limiting plate (21) is rotatably connected to a second locking block (414) for locking the keyway on the power shaft of the regulator. The end of the threaded rod (413) away from the center of the first limiting plate (21) is fixedly connected to a rotary wrench (415). The second limiting plate (22) has a vertically upward strip groove.

8. The testing device for a fuel injection quantity regulator according to claim 7, characterized in that: The first limiting plate (21) has an annular groove (42) on the side facing the second limiting plate (22). The inner contour of the annular groove (42) coincides with the outer contour of the fixed ring (41). The inner wall of the annular groove (42) has two eccentric limiting holes (43) symmetrically opened at the top of the vertical line. Each of the two limiting holes (43) has a limiting shaft (44) that is slidably connected to it. The first limiting plate (21) has two connecting grooves corresponding to the limiting holes (43) on the side facing the second limiting plate (22). 45), the connecting groove (45) is connected to the limiting hole (43), the two limiting holes (43) and the connecting groove (45) are symmetrically distributed along the vertical line of the power shaft, the distance between the two connecting grooves (45) is adapted to the distance between the two ends of the fixing block (412), a stop block (46) is slidably connected in the connecting groove (45), a limiting groove slide (461) is opened on the outer wall of the stop block (46) opposite to the limiting shaft (44), one end of the limiting groove slide (461) is connected to one end of the limiting shaft (44). The limiting shaft (44) has parallel inclined surfaces. The bottom end of the limiting groove (461) is inserted into the limiting groove slide (461) and is slidably connected to the inclined surface at one end of the limiting groove slide (461). The end of the stop block (46) away from the second limiting plate (22) is fixedly connected to the inner wall of the connecting groove (45) with a spring (47). The end of the stop block (46) near the second limiting plate (22) extends outward from the connecting groove (45). The length of the end of the stop block (46) extending out of the connecting groove (45) is less than that of the stop block (46). 46) The maximum moving distance, the outer wall of the rotating ring (411) is fixedly connected to the fixed block (412), the connecting block (48) is fixedly connected to a horizontally arranged pressure block (49) on one side of the annular groove (42), the midpoint of the lower surface of the pressure block (49) is slidably connected to the inner wall of the annular groove (42) near the center, the distance between the two ends of the pressure block (49) is greater than the distance between the two ends of the fixed block (412), and the limiting shaft (44) does not coincide with the center of the annular groove (42).

9. The testing apparatus for a fuel injection quantity regulator according to claim 8, characterized in that: The end of the limiting groove (461) away from the inclined surface is connected to the outside.

10. The testing device for a fuel injection quantity regulator according to claim 1, characterized in that: The top of the limiting sleeve (13) is fixedly connected to the limiting sleeve block (15). The inner hole of the limiting sleeve block (15) is adapted to the upper limit groove of the limiting sleeve (13). The top of the first locking block (14) passes through the inner hole of the limiting sleeve block (15) and extends outward. The first locking block (14) and the limiting sleeve block (15) are respectively provided with matching through holes. Limiting screws (16) are installed in the through holes of the first locking block (14) and the limiting sleeve block (15).

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