Fuel injector armature stroke measuring device and measuring method

Abstract

The application relates to a fuel injector armature stroke measuring device and a measuring method. The measuring device comprises a clamping assembly, a measuring assembly and a force applying assembly. The clamping assembly is used for clamping the fuel injector. The measuring assembly comprises a fixed part and a measuring part movably connected with the fixed part. The fixed part is used for connecting the fuel injector and abutting against the adjusting ring of the fuel injector. The measuring part is used for abutting against the armature assembly of the fuel injector and can synchronously reciprocate with the armature assembly in a first direction. The measuring part is used for measuring the moving distance of the armature assembly in the first direction. One end of the force applying assembly is connected with the clamping assembly, and the other end is connected with the measuring part. The force applying assembly is used for applying a force to the measuring part towards the clamping assembly, so that the measuring part can drive the armature assembly to move in the first direction towards the clamping assembly. The measuring device can directly measure the armature stroke of the fuel injector, which is beneficial to reducing the measurement error of the armature stroke, improving the accuracy and reliability of the armature stroke measurement data.

Description

Technical Field

[0001] This application relates to the field of fuel injector armature stroke measurement technology, and in particular to a fuel injector armature stroke measurement device and measurement method. Background Technology

[0002] In related technologies, in order to measure the armature stroke of the fuel injector, an electromagnet component is usually selected to control the movement of the armature assembly. The first distance L1 from the large end face of the armature to the small end face of the armature rod is measured by a dial indicator. The adjusting ring is placed on the fuel injector body, and the second distance L2 from the small end face of the armature rod to the adjusting ring is measured by a dial indicator. The difference between the first distance L1 and the second distance L2 is the armature stroke.

[0003] However, in the above measurement method, the dial indicator has a first measurement error when measuring the first distance L1, and a second measurement error when measuring the second distance L2. Calculating the difference between the two values ​​will further increase the measurement error of the armature stroke, affecting the accuracy of the armature stroke measurement data of the fuel injector. Summary of the Invention

[0004] Therefore, it is necessary to provide an injector armature stroke measuring device and method to address the technical problem of large errors in the measurement data of injector armature stroke in related technologies.

[0005] According to a first aspect of this application, an embodiment of this application provides an injector armature stroke measuring device, comprising:

[0006] Clamping assembly for clamping injectors;

[0007] A measuring instrument assembly includes a fixing member and a measuring member movably connected to the fixing member. The fixing member is used to connect to and abut against the adjusting ring of the injector. The measuring member abuts against the armature assembly of the injector and is capable of reciprocating synchronously with the armature assembly in a first direction. The measuring member is used to measure the distance the armature assembly moves in the first direction.

[0008] The force application component has one end connected to the clamping assembly and the other end connected to the measuring element. The force application component is used to apply a force toward the clamping assembly to the measuring element so that the measuring element can drive the armature assembly to move toward the clamping assembly in a first direction.

[0009] In one embodiment, the measuring element includes a measuring rod and a measuring head sleeved on the measuring rod. The end of the measuring head away from the measuring rod is provided with a guide hole extending in a first direction. The guide hole is used for the armature assembly to pass through, so as to guide the movement of the armature assembly.

[0010] In one embodiment, the fastener includes a cap and a base connected to the cap, the cap being used to connect to the injector and the base being used to abut against the adjusting ring;

[0011] The base is provided with a first through hole extending in a first direction. The first through hole includes a large diameter section and a small diameter section. The measuring rod and the measuring head are both located in the large diameter section, and the small diameter section is used for the armature assembly to pass through.

[0012] In one embodiment, the measuring tool assembly further includes a first fastener extending along a second direction;

[0013] The base is provided with a first fastening hole extending in the second direction. The first fastening hole communicates with the large-diameter section. The first fastener can pass through the first fastening hole and abut against the measuring rod.

[0014] The second direction intersects with the first direction.

[0015] In one embodiment, the measuring tool assembly further includes a clamping ring fitted on the end of the measuring rod away from the measuring head. The clamping ring has a groove extending in a first direction around its periphery. A first fastener can pass through a first fastening hole and the groove and abut against the clamping ring.

[0016] In one embodiment, the gauge assembly further includes a connector connected to the measuring element, and a force-applying component is capable of applying a force toward the clamping assembly to the connector so that the connector drives the measuring element to move in a first direction.

[0017] In one embodiment, the force-applying component includes a first hanger disposed on the clamping assembly, a second hanger disposed on the measuring member, and an elastic member connected between the first hanger and the second hanger, the elastic member being used to apply an elastic force toward the clamping assembly to the measuring member.

[0018] In one embodiment, the force-applying components include a first force-applying component and a second force-applying component arranged symmetrically.

[0019] In one embodiment, the clamping assembly includes a clamping platform and a limiting plate connected to the clamping platform. The clamping platform has a clamping groove for clamping the injector, and the limiting plate has a limiting groove for limiting the flat portion of the injector.

[0020] According to a second aspect of this application, embodiments of this application provide a method for measuring the armature stroke of an injector, using the injector armature stroke measuring device from any of the above embodiments for measurement. The measurement method includes:

[0021] The injector is clamped to the clamping assembly;

[0022] The fastener is connected to the injector and abuts against the injector's adjusting ring;

[0023] Set the measuring piece to zero;

[0024] Connect the two ends of the force application component to the clamping component and the measuring component, respectively;

[0025] Read the measurement value when the measuring element is not moving.

[0026] Through the above technical solution, the fixing component abuts against the adjusting ring, and the measuring component abuts against the armature assembly. Under the action of the force application component, the measuring component can drive the armature assembly to move towards the clamping component in the first direction. The measuring component can measure the moving distance of the armature assembly in the first direction, which is the armature stroke. Thus, the armature stroke of the injector can be directly measured, which helps to reduce the measurement error of the armature stroke and improve the accuracy and reliability of the measurement data of the armature stroke. Attached Figure Description

[0027] Figure 1 This is a cross-sectional view of the injector armature stroke measuring device installed on the injector in an embodiment of this application.

[0028] Figure 2 This is a partial cross-sectional view of the injector armature stroke measuring device in an embodiment of this application.

[0029] Figure 3 This is a cross-sectional view of the fuel injector in an embodiment of this application.

[0030] Figure 4 for Figure 3 Enlarged schematic diagram of unit A in the middle.

[0031] Explanation of reference numerals in the attached drawings: 100-Injector armature stroke measuring device; 110-Clamping assembly; 111-Clamping table; 112-Limiting plate; 120-Measuring tool assembly; 121-Fixing component; 122-Measuring component; 123-First fastener; 124-Clamping ring; 125-Connecting component; 130-Force application assembly; 131-First hanging component; 132-Second hanging component; 133-Elastic component; 1-Measuring rod; 2-Measuring head; 3 - Guide hole; 4- Tightening cap; 5- Base; 6- Slide groove; 7- Clamping groove; 8- Moving groove; 10- Injector; 11- Injector body; 12- Valve sleeve; 13- Control valve seat; 14- Damping spring; 15- Ball seat; 16- Steel ball; 17- Adjusting ring; 18- Armature rod; 19- Armature; 20- Damping pad; 21- Needle valve; 22- Needle valve body; 23- Nozzle tightening cap; F1- First direction; F2- Second direction. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] It should be noted that an element is referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intermediate element. An element is considered to be "connected" to another element, which may be directly connected to the other element or may also include an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible embodiments. "Upper" and "lower" are defined according to the drawing direction in the accompanying drawings, where "first direction" may be the axial direction of the injector and "second direction" may be the radial direction of the injector.

[0038] To better understand the embodiments of the injector armature stroke measuring device 100 and measuring method provided in this application, please refer to... Figure 3 and Figure 4 The injector 10 may include an injector body 11, a needle valve 21, a nozzle cap 23, a needle valve body 22, a valve sleeve 12, a control valve seat 13, and an armature assembly. The armature assembly includes an armature rod 18 and an armature 19. The valve sleeve 12 and the control valve seat 13 are located inside the injector body 11. The stepped surface of the valve sleeve 12 abuts against the injector body 11. The control valve seat 13 is threadedly connected to the injector body 11 and is used to press the valve sleeve 12. A damping spring 14 is provided on the control valve seat 13. The end of the damping spring 14 away from the control valve seat 13 abuts against the armature 19. A damping washer 20 is provided between the head of the armature rod 18 and the armature 19. The rod of the armature rod 18 passes through the control valve seat 13. A steel ball 16 and a ball seat 15 are provided between the control valve seat 13 and the valve sleeve 12. The steel ball 16 is located in the socket of the ball seat 15. The ball seat 15 abuts against the rod of the armature rod 18. The steel ball 16 can abut against the conical surface of the valve sleeve 12. An adjusting ring 17 is provided on the upper end face of the injector body 11. The upper surface of the adjusting ring 17 is flush with the upper surface of the armature 19. Applying a downward force to the armature rod 18 can overcome the elastic force of the damping spring 14, so that the armature rod 18 can drive the armature 19 to move downward. When the armature 19 no longer moves, the distance between the upper surface of the adjusting ring 17 and the upper surface of the armature 19 is the armature stroke.

[0039] According to the first aspect of this application, see Figure 1 and Figure 2This application provides an injector armature stroke measuring device 100. The measuring device includes a clamping assembly 110, a measuring tool assembly 120, and a force application assembly 130. The clamping assembly 110 is used to clamp the injector 10. The measuring tool assembly 120 includes a fixing member 121 and a measuring member 122 movably connected to the fixing member 121. The fixing member 121 is used to connect the injector 10 and abut against the adjusting ring 17 of the injector 10. The measuring member 122 is used to abut against the armature assembly of the injector 10 and can reciprocate synchronously with the armature assembly in a first direction F1. The measuring member 122 is used to measure the moving distance of the armature assembly in the first direction F1. One end of the force application assembly 130 is connected to the clamping assembly 110 and the other end is connected to the measuring member 122. The force application assembly 130 is used to apply a force toward the clamping assembly 110 to the measuring member 122 so that the measuring member 122 can drive the armature assembly to move toward the clamping assembly 110 in the first direction F1.

[0040] Through the above technical solution, the injector 10 is clamped in the clamping assembly 110, the fixing member 121 abuts against the adjusting ring 17, and the measuring member 122 abuts against the armature rod 18 of the armature assembly. The measuring member 122 can move synchronously with the armature assembly in the first direction F1. The force application assembly 130 can apply a force to the measuring member 122 toward the clamping assembly 110. The measuring member 122 can drive the armature rod 18 and the armature 19 to move toward the clamping assembly 110 in the first direction. Since the upper surface of the adjusting ring 17 of the injector 10 and the upper surface of the armature 19 are flush in the initial state, the moving distance of the armature 19 in the first direction F1 is the armature stroke. The measuring member 122 can measure the moving distance of the armature assembly in the first direction F1, thereby directly measuring the armature stroke. The armature stroke of the injector 10 can be measured with a simple measuring device, which is beneficial to reduce the measurement error of the armature stroke and improve the accuracy and reliability of the armature stroke measurement data.

[0041] It is understood that in the above embodiment, the force application component 130 can apply a force toward the clamping component 110 to the measuring component 122. This force can overcome the elastic force of the damping spring 14 and cause the measuring component 122 to move the armature assembly until the steel ball 16 abuts against the conical surface of the valve sleeve 12. Thus, during the measurement of the armature stroke, it is not necessary to remove the damping spring 14, which simplifies the preparation steps before measuring the armature stroke and improves the measurement efficiency of the armature stroke. By simplifying the assembly steps of the injector 10, the assembly efficiency of the injector 10 can also be improved.

[0042] In some embodiments, see Figure 1 and Figure 2The measuring component 122 includes a measuring rod 1 and a measuring head 2 sleeved on the measuring rod 1. The end of the measuring head 2 away from the measuring rod 1 has a guide hole 3 extending along a first direction F1. The guide hole 3 is used for the armature assembly to pass through, thus guiding the movement of the armature assembly. During the movement of the armature assembly driven by the measuring rod 1 and the measuring head 2, the head of the armature rod 18 can abut against the wall of the guide hole 3, thereby reducing the possibility of the armature rod 18 deviating during movement. This helps improve the stability of the injector armature stroke measuring device 100 during the measurement process and the accuracy of the armature stroke measurement data.

[0043] When measuring the armature stroke using the injector armature stroke measuring device 100 provided in this application, the measuring element 122 can be set to zero when the fixing element 121 is connected to the injector 10 and the fixing element 121 abuts against the adjusting ring 17. When the force application component 130 applies a force to make the measuring element 122 drive the armature assembly to press against the ball seat 15, so that the steel ball 16 in the ball seat 15 abuts against the conical surface of the valve sleeve 12, the reading of the measuring element 122 is the armature stroke of the injector 10. This simplifies the steps of armature stroke measurement, facilitates operation, and helps to reduce the measurement error of armature stroke.

[0044] In the above embodiment, the measuring element 122 can be a dial indicator with a resolution ≤0.0005mm, thereby improving the accuracy of armature stroke measurement. When the repeatability accuracy of dozens of measurements of the armature stroke of the same injector 10 is within ±0.001mm, the dial indicator meets the usage requirements.

[0045] In some embodiments, see Figure 1 and Figure 2 In order to connect the measuring rod 1 and the measuring head 2, the measuring head 2 may be provided with a first mounting hole extending along the first direction F1. The first mounting hole includes a connecting section and a guide section. The measuring rod 1 is located in the connecting section, and the guide hole 3 is formed in the guide section. The measuring component 122 may also include a second fastener extending along the second direction F2. The measuring head 2 is provided with a second fastening hole extending along the second direction F2. The second fastening hole communicates with the connecting section. The second fastener can pass through the second fastening hole and abut against the measuring rod 1. The second direction F2 intersects with the first direction F1.

[0046] This application does not limit the selection of the second fastener. In some embodiments, the second fastener may be an M3 screw, and the second fastening hole may be formed with an internal thread that mates with the M3 screw.

[0047] In some embodiments, see Figure 1 and Figure 2To achieve the connection between the fixing member 121 and the injector 10, and the abutment between the fixing member 121 and the adjusting ring 17, the fixing member 121 may include a tightening cap 4 and a base 5 connected to the tightening cap 4. The tightening cap 4 is used to connect the injector 10, and the base 5 is used to abut the adjusting ring 17. The base 5 has a first through hole extending along the first direction F1. The first through hole includes a large-diameter section and a small-diameter section. The probe 1 and the probe 2 are both located in the large-diameter section, and the small-diameter section is used for the armature assembly to pass through. The head of the armature rod 18 of the armature assembly can pass through the small-diameter section and enter the guide hole 3 of the probe 2.

[0048] In the above embodiment, the probe 2 and the base 5 can be machined into a pair of parts by grinding, thereby making the movement of the probe 2 smoother. The outer peripheral surface of the tightening cap 4 can be knurled to facilitate manual tightening of the tightening cap 4. Since the lower surface of the base 5 abuts against the adjusting ring 17, in order to improve the accuracy of the armature stroke measurement data, the probe 2 and the base 5 meet the form and position tolerance requirements during the machining process.

[0049] In some embodiments, see Figure 1 and Figure 2 The tightening cap 4 may have an internal thread, and the injector body 11 has an external thread. The tightening cap 4 and the injector body 11 can be connected by threads. By adjusting the position of the tightening cap 4 on the injector body 11, the base 5 abuts against the adjusting ring 17. At this time, the assembly of the measuring tool assembly 120 and the injector 10 is completed. The dial indicator of the measuring tool assembly 120 is set to zero, so that after the force application component 130 applies force, the measuring rod 1 of the dial indicator can directly measure the armature stroke, which is convenient to operate and helps to improve the accuracy of the measurement data.

[0050] In some embodiments, see Figure 1 and Figure 2 In order to connect the measuring element 122 and the base 5, the measuring tool assembly 120 may also include a first fastener 123 extending along the second direction F2. The base 5 is provided with a first fastening hole extending along the second direction F2. The first fastening hole communicates with the large diameter section. The first fastener 123 can pass through the first fastening hole and abut against the measuring rod 1. The second direction F2 intersects with the first direction F1.

[0051] This application does not limit the selection of the first fastener 123. In some embodiments, the first fastener 123 can be an M5 screw, and the first fastening hole can be formed with an internal thread that mates with the M5 screw.

[0052] In some embodiments, see Figure 1 and Figure 2The measuring tool assembly 120 may further include a clamping ring 124, which is sleeved on the end of the measuring rod 1 away from the measuring head 2. The clamping ring 124 has a groove 6 extending along the first direction F1 on its periphery. The first fastener 123 can pass through the first fastening hole and the groove 6 and abut against the clamping ring 124. When the measuring rod 1 and the measuring head 2 move in the first direction F1 under the action of the force application assembly 130, the first fastener 123 can pass through the first fastening hole and the groove 6 and abut against different positions of the clamping ring 124. The design of the clamping ring 124 can avoid direct contact between the first fastener 123 and the measuring rod 1, which is beneficial to protecting the measuring rod 1 and improving the service life of the injector armature stroke measuring device 100 provided in this application.

[0053] In some embodiments, see Figure 1 and Figure 2 In order to facilitate the force application of the force application component 130 to the measuring component 122, the measuring tool assembly 120 may also include a connector 125 connected to the measuring component 122. The force application component 130 can apply a force toward the clamping assembly 110 to the connector 125 so that the connector 125 drives the measuring component 122 to move in the first direction F1.

[0054] For an embodiment of the injector armature stroke measuring device 100 including a probe 2 and a base 5, see [reference needed]. Figure 1 and Figure 2 The probe 2 may be provided with a third fastening hole extending along the second direction F2, and the base 5 may be formed with a moving groove 8 extending along the first direction F1. The connector 125 can pass through the moving groove 8 and the third fastening hole. The third fastening hole may be formed with an internal thread, and the connecting rod may be formed with an external thread that mates with the internal thread. When the force application component 130 applies a force to the connector 125, the connector 125 can move within the moving groove 8 of the base 5 and drive the probe 1 and probe 2 to move toward the clamping component 110, thereby enabling the probe 2 to abut against the armature rod 18, and causing the armature rod 18 to drive the armature 19 to move.

[0055] In the above embodiments, see Figure 1 and Figure 2 There can be multiple connectors 125, and these connectors 125 can be evenly arranged along the circumference of the probe 2, thereby facilitating the force application component 130 to apply force to the probe 2. This application does not limit the specific structure of the connectors 125. In some embodiments, the connector 125 can be a connecting rod extending along the second direction F2.

[0056] In some embodiments, see Figure 1 and Figure 2In order to apply a force toward the clamping assembly 110 to the measuring member 122, the force application assembly 130 may include a first hanging member 131 disposed on the clamping assembly 110, a second hanging member 132 disposed on the measuring member 122, and an elastic member 133 connected between the first hanging member 131 and the second hanging member 132. The elastic member 133 is used to apply an elastic force toward the clamping assembly 110 to the measuring member 122.

[0057] Before measuring the armature stroke, one or both ends of the elastic element 133 can be in a free state, meaning the elastic element 133 is not connected to the first hanging member 131 and / or the second hanging member 132. In this case, the elastic element 133 does not apply an elastic force to the measuring element 122. During the armature stroke measurement, both ends of the elastic element 133 can be connected to the first hanging member 131 and the second hanging member 132 respectively. The elastic element 133 can then apply an elastic force towards the clamping assembly 110 to the measuring element 122, thereby moving the armature rod 18 and the armature 19. Because the elastic element 133 moves the measuring rod 1 and the measuring head 2, measurement errors caused by unstable human force application are avoided, reducing the influence of human factors on the measurement results and improving the accuracy of the armature stroke measurement.

[0058] This application does not limit the specific selection of the elastic element 133. In some embodiments, please refer to... Figure 1 and Figure 2 The elastic element 133 can be a spring, and the stiffness of the spring can be greater than that of the damping spring 14. The spring can provide a constant elastic force to the connecting element 125. The selection of the spring helps to reduce the manufacturing cost of the measuring device of this application.

[0059] In other embodiments, the force application component 130 may also include a power component, with its two ends connected to the connector 125 and the clamping component 110, respectively. The power component can apply a force to the connector 125 toward the clamping component 110. The power component may be a motor, a hydraulic cylinder, or the like.

[0060] In some embodiments, see Figure 1 and Figure 2 The first hanging member 131 and / or the second hanging member 132 can be hooks, which can be set on the connector 125 and the clamping assembly 110. At least one end of the elastic member 133 is not connected to the hook, which facilitates manual operation to keep the elastic member 133 in a free or stretched state. This helps to simplify the structure of the measuring device of this application and improve the ease of operation. When the elastic member 133 does not meet the force requirements or is damaged, it is easy to replace the elastic member 133, thereby helping to reduce the maintenance cost of the measuring device of this application.

[0061] In some embodiments, see Figure 1 and Figure 2 The force application component 130 may include a first force application component and a second force application component arranged symmetrically, which facilitates the force balance of the connecting rod, makes the movement of the probe 2 and the probe 1 smoother, protects the probe 1 and the probe 2, and thus helps to improve the accuracy of the armature stroke measurement data.

[0062] In the above embodiments, the number of connectors 125 can be the same as the number of force-applying components 130, so that each force-applying component 130 has a corresponding connector 125, which facilitates the force-applying component 130 to apply force to the connector 125.

[0063] In some embodiments, see Figure 1 The clamping assembly 110 may include a clamping table 111 and a limiting plate 112 connected to the clamping table 111. The clamping table 111 is provided with a clamping groove 7 for clamping the injector 10, and the limiting plate 112 is provided with a limiting groove for limiting the flat part of the injector 10, thereby fixing the position of the injector 10.

[0064] This application does not limit the specific shape of the clamping groove 7 and the limiting groove. In some embodiments, the clamping groove 7 may be a V-shaped groove extending along the first direction F1, with the injector 10 placed in the V-shaped groove. The limiting groove may be a U-shaped groove, with the flat portion of the injector 10 located in the U-shaped groove to limit the injector 10.

[0065] In some embodiments, see Figure 1 To connect the clamping table 111 and the limiting plate 112, the clamping assembly 110 may include a third fastener. The clamping table 111 has a fourth fastening hole with an internal thread. The limiting plate 112 may have a second through hole, through which the third fastener can pass and engage with the internal thread of the fourth fastening hole. A hook may be provided on the clamping table 111 or the limiting plate 112. The hook may have an external thread, and the clamping table 111 or the limiting plate 112 may have an internal thread hole to connect the hook to the clamping assembly 110.

[0066] To facilitate user operation of the measuring device of this application to measure the armature stroke, in some embodiments, the bottom of the clamping table 111 may be provided with an inclined surface for contacting the ground or operating table, and the inclination angle of the inclined surface may be 30°.

[0067] According to a second aspect of this application, an embodiment of this application provides a method for measuring the armature stroke of an injector, which uses the injector armature stroke measuring device 100 from any of the above embodiments for measurement. The measurement method includes:

[0068] The injector 10 is clamped in the clamping assembly 110; that is, the injector 10 can be placed in the V-shaped groove of the clamping table 111 of the clamping assembly 110, and the flat part of the injector 10 is located in the U-shaped groove of the limiting plate 112 of the clamping assembly 110, thereby completing the clamping of the injector 10.

[0069] The fastener 121 is connected to the injector 10 and abuts against the adjusting ring 17 of the injector 10; that is, the fastening cap 4 of the fastener 121 can be connected to the injector 10 by threads, so that the base 5 of the fastener 121 abuts against the adjusting ring 17.

[0070] Set measuring piece 122 to the zero position;

[0071] The two ends of the force application component 130 are respectively connected to the clamping component 110 and the measuring component 122; that is, the first hanging component 131 of the force application component 130 can be provided on the clamping table 111, the second hanging component 132 can be provided on the connecting component 125, and the two ends of the elastic component 133 are respectively connected to the first hanging component 131 and the second hanging component 132. The elastic component 133 can apply an elastic force toward the clamping table 111 to the connecting component 125 to drive the movement of the probe 2, thereby causing the armature rod 18 and the armature 19 to move.

[0072] When the measuring element 122 does not move, the reading of the measuring element 122 is read. When the measuring element 122 stops moving, that is, when the armature rod 18 drives the armature 19 to move, the steel ball 16 located in the ball seat 15 abuts against the conical surface of the valve sleeve 12. At this time, the distance between the adjusting ring 17 and the upper surface of the armature 19 in the first direction F1 is the armature stroke. At this time, the reading of the measuring element 122 is the armature stroke.

[0073] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0074] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A fuel injector armature stroke measuring device, characterized in that, include: Clamping assembly for clamping fuel injectors; A measuring tool assembly includes a fixing member and a measuring member movably connected to the fixing member. The fixing member is used to connect the injector and abut against the adjusting ring of the injector. The measuring member is used to abut against the armature assembly of the injector and is capable of reciprocating synchronously with the armature assembly in a first direction. The measuring member is used to measure the movement distance of the armature assembly in the first direction. as well as A force-applying component, one end of which is connected to the clamping assembly and the other end of which is connected to the measuring element, is used to apply a force toward the clamping assembly to the measuring element so that the measuring element can drive the armature assembly to move toward the clamping assembly in the first direction; The force-applying component includes a first hanging member disposed on the clamping assembly, a second hanging member disposed on the measuring member, and an elastic member connecting the first hanging member and the second hanging member. The elastic member is used to apply an elastic force to the measuring member toward the clamping assembly. The force-applying component includes a first force-applying component and a second force-applying component arranged symmetrically.

2. The injector armature stroke measuring device according to claim 1, characterized in that, The measuring component includes a measuring rod and a measuring head sleeved on the measuring rod. The end of the measuring head away from the measuring rod is provided with a guide hole extending along the first direction. The guide hole is used for the armature assembly to pass through, so as to guide the movement of the armature assembly.

3. The injector armature stroke measuring device according to claim 2, characterized in that, The fastener includes a cap and a base connected to the cap, the cap being used to connect the injector and the base being used to abut against the adjusting ring; The base is provided with a first through hole extending along the first direction. The first through hole includes a large diameter section and a small diameter section. The probe and the probe head are both located in the large diameter section, and the small diameter section is used for the armature assembly to pass through.

4. The injector armature stroke measuring device according to claim 3, characterized in that, The measuring tool assembly also includes a first fastener extending along a second direction; The base is provided with a first fastening hole extending along the second direction. The first fastening hole communicates with the large-diameter section. The first fastener can pass through the first fastening hole and abut against the measuring rod. The second direction intersects with the first direction.

5. The injector armature stroke measuring device according to claim 4, characterized in that, The measuring tool assembly also includes a clamping ring, which is sleeved on the end of the measuring rod away from the measuring head. The clamping ring has a groove extending along the first direction on its periphery. The first fastener can pass through the first fastening hole and the groove and abut against the clamping ring.

6. The injector armature stroke measuring device according to any one of claims 1-5, characterized in that, The measuring tool assembly further includes a connector connected to the measuring element, and the force application component is capable of applying a force toward the clamping assembly to the connector so that the connector drives the measuring element to move in the first direction.

7. The injector armature stroke measuring device according to any one of claims 1-5, characterized in that, The clamping assembly includes a clamping platform and a limiting plate connected to the clamping platform. The clamping platform is provided with a clamping groove for clamping the injector, and the limiting plate is provided with a limiting groove for limiting the flat portion of the injector.

8. A method for measuring the armature stroke of an injector, comprising measuring the armature stroke of an injector as described in any one of claims 1-7, characterized in that, The measurement method includes: The injector is clamped to the clamping assembly; The fastener is connected to the injector and abuts against the adjusting ring of the injector; Set the measuring element to zero; The two ends of the force-applying component are respectively connected to the clamping component and the measuring component; The reading of the measuring element is taken when the measuring element does not move.

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