An assembly apparatus for a high pressure fuel injection armature

Abstract

This invention relates to the field of assembly technology, specifically to an assembly device for a high-pressure fuel injection armature. The device includes a support base and a vertical plate fixedly mounted on the support base. It also includes an assembly plate movably mounted on the support base and connected to an annular guide structure mounted on the support base. The assembly plate is further connected to a sliding engagement mechanism mounted on the vertical plate, which is connected to a threaded drive mechanism mounted on the vertical plate. Two sets of support mechanisms are symmetrically arranged on the assembly plate. The threaded drive mechanism drives the sliding engagement mechanism to lower the assembly plate and triggers the support mechanism. The sliding engagement mechanism drives the assembly plate to rotate, aligning the guide holes and guide grooves on the armature and the fuel injector. Through the cooperation of various mechanisms and components, an effective assembly assistance function for the armature is achieved, with a high degree of automation, making it suitable for widespread use.

Description

Technical Field

[0001] This invention relates to the field of assembly technology, specifically to an assembly device for a high-pressure fuel injection armature. Background Technology

[0002] In a solenoid-controlled fuel injection system, the injector is connected to both the inlet and outlet throttle valves. The main components of the injector are the coil, valve body, and armature. Fuel enters the injector from the common rail via a high-pressure fuel line, filling the valve control chamber through the inlet throttle orifice. When the injector is stationary, all forces are in equilibrium, and the solenoid valve closes the outlet throttle orifice in the valve control chamber by means of a spring. Because the area of ​​the control plunger is larger than the shoulder pressure-bearing area of ​​the nozzle needle valve, and they both bear the same pressure, the hydraulic pressure exerted on the nozzle needle valve by the control plunger is greater, generating a closing force that presses the nozzle needle valve firmly against its valve seat, keeping the nozzle in the closed state.

[0003] To initiate fuel injection, the electronic control unit (ECU) sends an electrical pulse signal to the injector, activating the solenoid coil. This causes the armature of the solenoid valve to overcome the spring force and lift off its seat, opening the fuel outlet orifice in the control chamber. Fuel can then flow from the control chamber into the return line, creating a pressure drop within the control chamber. The armature can only move relative to the injector, not rotate, and its center must be aligned with the injector's center; therefore, guide holes and guide grooves are provided on the outer periphery of the armature.

[0004] When assembling the armature onto the injector, it is necessary to ensure that the two are coaxially aligned and that the guide holes and grooves are aligned with the guide parts on the injector. Currently, in the industry, the orientation of the armature or injector needs to be pre-adjusted before assembly to ensure that the guide holes and grooves on the armature can fit with the guide parts on the injector. The automation level of the assembly equipment is low, making it difficult to effectively guarantee the production schedule. Summary of the Invention

[0005] The purpose of this invention is to provide an assembly device for high-pressure fuel injection armatures to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] An assembly device for a high-pressure fuel injection armature includes a support base and a vertical plate fixedly mounted on the support base, and further includes:

[0008] An assembly plate is movably mounted on the support base and connected to an annular guide structure mounted on the support base. The assembly plate is also connected to a sliding engagement mechanism mounted on the vertical plate, and the sliding engagement mechanism is connected to a threaded drive mechanism mounted on the vertical plate.

[0009] The support mechanism is provided in two symmetrical sets on the assembly plate to support the armature. The threaded drive mechanism can drive the sliding engagement mechanism to lower the assembly plate and trigger the support mechanism. The sliding engagement mechanism can drive the assembly plate to rotate so that the guide holes and guide grooves on the armature and the fuel injector correspond.

[0010] A tapered component is movably mounted on the assembly plate and connected to an elastic driven mechanism installed between the threaded drive mechanism and the sliding engagement mechanism. The elastic driven mechanism is triggered after the support mechanism has finished moving to drive the tapered component into the center hole of the armature and perform a fastening action on the armature located on the support mechanism.

[0011] As a further embodiment of the present invention: the annular guide structure includes an annular guide rail fixedly installed on the support base, two guide seats slidably fitted within the annular guide rail, and two upright arms respectively fixedly installed on the two guide seats, wherein the assembly plate is slidably connected to the two upright arms.

[0012] As a further embodiment of the present invention: the supporting mechanism includes a first lead screw rotatably mounted on the assembly plate, a transverse plate slidably disposed on the assembly plate, and a first threaded sleeve sleeved on the first lead screw and fixedly connected to the transverse plate;

[0013] The first threaded sleeve is threadedly connected to the first lead screw, and a support member is fixedly installed at the end of the transverse plate away from the first threaded sleeve. The support member is arc-shaped. The first lead screw is connected to a gear rotatably mounted on the assembly plate via a transmission belt. The gear engages with a rack plate fixed on the vertical arm.

[0014] As a further embodiment of the present invention: the sliding fitting mechanism includes a rotating shaft rotatably mounted on the vertical plate, a sleeve slidably fitted with the rotating shaft, and a first drive motor mounted on the vertical plate. The rotating shaft is connected to the output end of the first drive motor, and a limiting structure is provided between the sleeve and the rotating shaft. The end of the sleeve away from the first drive motor is fixed to the assembly plate, and the sleeve is also connected to the threaded drive mechanism.

[0015] As a further embodiment of the present invention: the limiting structure includes two strip-shaped protrusions formed on the outer wall of the rotating shaft and two strip-shaped grooves provided on the inner wall of the sleeve, the strip-shaped grooves being adapted to the strip-shaped protrusions, and the strip-shaped protrusions being parallel to the central axis of the rotating shaft.

[0016] As a further embodiment of the present invention: the threaded drive mechanism includes a second lead screw rotatably mounted on the vertical plate, a second threaded sleeve sleeved on the second lead screw and threadedly connected to the second lead screw, and a horizontal plate disposed between the second threaded sleeve and the sleeve.

[0017] The vertical plate is also equipped with a second drive motor, the output end of which is connected to the second lead screw. The horizontal plate is fixedly connected to the second threaded sleeve and rotatably connected to the sleeve.

[0018] As a further embodiment of the present invention: the elastic driven mechanism includes a slider slidably disposed on the horizontal plate, a guide plate fixed on the horizontal plate, a driven plate slidably disposed on the guide plate, and a driven tube fitting slidably sleeved on the sleeve;

[0019] The slider is connected to an elastic connection structure provided on the horizontal plate. The driven tube is fixed to the tapered member through a connecting rod. The connecting rod is slidably connected to the assembly plate. A connecting rod is also provided between the driven plate and the slider. The two ends of the connecting rod are rotatably connected to the driven plate and the slider, respectively.

[0020] The slider has a pulley mounted on its side via a connecting arm. The pulley abuts against a limiting plate fixed on the vertical plate, and the limiting plate has a vertical section and an inclined section.

[0021] As a further embodiment of the present invention: the elastic connection structure includes a crossbar fixedly mounted on the cross plate by a first protrusion, a second protrusion fixed to the slider and slidably connected to the crossbar, and a cylindrical spring sleeved on the outer periphery of the crossbar, one end of the cylindrical spring being connected to the first protrusion and the other end being connected to the second protrusion.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention has a novel design. When the device is working, the threaded drive mechanism drives the armature to move downward through the sliding engagement mechanism. During the downward movement of the armature, the supporting mechanism and the elastic driven mechanism are triggered in sequence. The supporting mechanism supports the armature, and the elastic driven mechanism drives the tapered part to fasten the armature. The sliding engagement mechanism ensures that the guide hole and guide groove on the armature fit with the guide part on the injector. Therefore, through the mutual cooperation between various mechanisms and components, an effective assembly assistance function for the armature is achieved, and the degree of automation is high, making it suitable for widespread use. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of one embodiment of an assembly device for a high-pressure fuel injection armature.

[0024] Figure 2 This is a schematic diagram of another aspect of an embodiment of a high-pressure fuel injection armature assembly device.

[0025] Figure 3 This is a structural schematic diagram from another angle of one embodiment of an assembly device for a high-pressure fuel injection armature.

[0026] Figure 4 for Figure 2 Enlarged view of the structure at point A in the middle.

[0027] Figure 5 for Figure 3 Enlarged view of the structure at point B in the middle.

[0028] Figure 6 This is a schematic diagram of the support mechanism in one embodiment of the assembly equipment for high-pressure fuel injection armatures.

[0029] Figure 7 This is a schematic diagram of the structure of the elastic follower mechanism in one embodiment of the assembly equipment for high-pressure fuel injection armature.

[0030] In the diagram: 1. Support base; 2. Vertical plate; 3. Circular guide rail; 4. Guide seat; 5. Vertical arm; 6. Assembly plate; 7. Support component; 8. First lead screw; 9. Gear; 10. Rack plate; 11. Transmission belt; 12. Transverse plate; 13. First drive motor; 14. Rotating shaft; 1401. Strip-shaped protrusion; 15. Sleeve; 16. Second drive motor; 17. Second lead screw; 18. First threaded sleeve; 19. Horizontal plate; 1901. First protruding block; 20. Driven pipe fitting; 21. Connecting rod; 22. Conical part; 23. Guide plate; 24. Driven plate; 25. Connecting rod; 26. Slider; 2601. Second protruding block; 27. Second threaded sleeve; 28. Horizontal bar; 29. ​​Cylindrical spring; 30. Connecting arm; 31. Pulley; 32. Limiting plate; 3201. Vertical section; 3202. Inclined section. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] Furthermore, elements in this invention are referred to as being "fixed to" or "set on" another element, which may be directly on the other element or may also include an intervening element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or may also include an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0033] Please see Figures 1-7 In this embodiment of the invention, an assembly device for a high-pressure fuel injection armature includes a support base 1 and a vertical plate 2 fixedly installed on the support base 1, and further includes:

[0034] Assembly plate 6 is movably mounted on support base 1 and connected to an annular guide structure mounted on support base 1. Assembly plate 6 is also connected to a sliding fitting mechanism mounted on vertical plate 2. The sliding fitting mechanism is connected to a threaded drive mechanism mounted on vertical plate 2.

[0035] The support mechanism is provided in two symmetrical sets on the assembly plate 6 for supporting the armature. The threaded drive mechanism can drive the sliding engagement mechanism to lower the assembly plate 6 and trigger the support mechanism. The sliding engagement mechanism can drive the assembly plate 6 to rotate so that the guide holes and guide grooves on the armature and the fuel injector correspond.

[0036] The tapered member 22 is movably mounted on the assembly plate 6 and connected to the elastic driven mechanism installed between the threaded drive mechanism and the sliding fitting mechanism. The elastic driven mechanism is triggered after the support mechanism has finished moving to drive the tapered member 22 into the center hole of the armature and perform a fastening action on the armature located on the support mechanism.

[0037] In actual operation, the injector is located in a fixed position on the support base 1. The armature to be assembled is transported by the robot to the bottom of the assembly plate 6. Then, the threaded drive mechanism works, driving the assembly plate 6 down through the sliding engagement mechanism. At this time, the support mechanism and the elastic follower mechanism are triggered in sequence. The support mechanism supports the armature. Then the robot is withdrawn. When the elastic follower mechanism is triggered, it will drive the conical part 22 into the center hole of the armature, thereby fixing the armature.

[0038] Subsequently, the sliding fitting mechanism moves, driving the assembly plate 6 to rotate the armature until the guide holes and guide grooves on the armature and the injector correspond to each other, ensuring the accuracy of subsequent assembly. It should be noted that whether the guide holes and guide grooves on the armature and the injector correspond can be determined by the sensing components. When they correspond, the components will control the sliding fitting mechanism to stop working.

[0039] Finally, the threaded drive mechanism continues to drive the armature downward until it descends to a height suitable for assembly.

[0040] In summary, during operation, the threaded drive mechanism drives the armature downward through the sliding engagement mechanism. During the downward movement of the armature, the supporting mechanism and the elastic driven mechanism are triggered sequentially. The supporting mechanism supports the armature, and the elastic driven mechanism drives the tapered member 22 to fasten the armature. The sliding engagement mechanism ensures that the guide hole and guide groove on the armature fit with the guide part on the injector. Therefore, through the cooperation between various mechanisms and components, an effective assembly assistance function for the armature is achieved, with a high degree of automation, making it suitable for widespread use.

[0041] Please refer to it again. Figure 1 and Figure 2 The annular guide structure includes an annular guide rail 3 fixedly installed on the support base 1, two guide seats 4 slidably fitted in the annular guide rail 3, and two upright arms 5 respectively fixedly installed on the two guide seats 4. The assembly plate 6 is slidably connected to the two upright arms 5.

[0042] Please refer to it again. Figure 3 , Figure 4 as well as Figure 6 The supporting mechanism includes a first lead screw 8 rotatably mounted on the assembly plate 6, a transverse plate 12 slidably mounted on the assembly plate 6, and a first threaded sleeve 18 sleeved on the first lead screw 8 and fixedly connected to the transverse plate 12. The first threaded sleeve 18 is threadedly connected to the first lead screw 8, and a supporting member 7 is fixedly mounted at the end of the transverse plate 12 away from the first threaded sleeve 18. The supporting member 7 is arc-shaped. The first lead screw 8 is connected via a transmission belt 11 to a gear 9 rotatably mounted on the assembly plate 6. The gear 9 engages with a rack plate 10 fixed to the vertical arm 5.

[0043] When the threaded drive mechanism operates and drives the assembly plate 6 to move downward through the sliding engagement mechanism, the gear 9 will mesh with the rack plate 10 and rotate. Then, the gear 9 will drive the first lead screw 8 to rotate through the transmission belt 11, so that the first threaded sleeve 18 will engage with the first lead screw 8. Then, the first threaded sleeve 18 will slide through the transverse plate 12, so that the two support members 7 will move closer to each other to support the armature.

[0044] Furthermore, when the sliding engagement mechanism moves and drives the assembly plate 6 to rotate, the assembly plate 6 will drive the vertical arm 5 to rotate, and the guide seat 4 will slide within the annular guide rail 3.

[0045] After assembly, in order to facilitate the smooth separation of the support 7 from the armature, the first lead screw 8 needs to change its rotation direction. Therefore, the first lead screw 8 should be connected to a corresponding drive motor to drive the support 7 to separate from the armature normally after assembly.

[0046] Please refer to it again. Figure 7 The sliding fitting mechanism includes a rotating shaft 14 rotatably mounted on the vertical plate 2, a sleeve 15 slidably fitted with the rotating shaft 14, and a first drive motor 13 mounted on the vertical plate 2. The rotating shaft 14 is connected to the output end of the first drive motor 13, and a limiting structure is provided between the sleeve 15 and the rotating shaft 14. One end of the sleeve 15 away from the first drive motor 13 is fixed to the assembly plate 6, and the sleeve 15 is also connected to the threaded drive mechanism. The limiting structure includes two strip-shaped protrusions 1401 formed on the outer wall of the rotating shaft 14 and two strip-shaped grooves provided on the inner wall of the sleeve 15. The strip-shaped grooves are adapted to the strip-shaped protrusions 1401, and the strip-shaped protrusions 1401 are parallel to the central axis of the rotating shaft 14.

[0047] When the first drive motor 13 is working, it will drive the rotating shaft 14 to rotate. Then, the rotating shaft 14 can drive the sleeve 15 to rotate through the strip-shaped protrusion 1401 and the strip-shaped groove, so that the mounting plate 6 drives the armature to deflect in the direction until the guide hole and guide groove on the armature are engaged with the guide part on the injector. When the threaded drive mechanism is working, it will drive the sleeve 15 to slide on the rotating shaft 14, so that the height of the armature is reduced.

[0048] Please refer to it again. Figure 1 and Figure 7The threaded drive mechanism includes a second lead screw 17 rotatably mounted on the vertical plate 2, a second threaded sleeve 27 sleeved on and threadedly connected to the second lead screw 17, and a horizontal plate 19 disposed between the second threaded sleeve 27 and the sleeve 15. A second drive motor 16 is also mounted on the vertical plate 2, with its output end connected to the second lead screw 17. The horizontal plate 19 is fixedly connected to the second threaded sleeve 27 and rotatably connected to the sleeve 15.

[0049] The elastic driven mechanism includes a slider 26 slidably disposed on the horizontal plate 19, a guide plate 23 fixed on the horizontal plate 19, a driven plate 24 slidably disposed on the guide plate 23, and a driven tube 20 slidably sleeved on the sleeve 15. The slider 26 is connected to an elastic connection structure disposed on the horizontal plate 19. The driven tube 20 is fixed to the tapered member 22 via a connecting rod 21. The connecting rod 21 is slidably connected to the assembly plate 6. A connecting rod 25 is also provided between the driven plate 24 and the slider 26. The two ends of the connecting rod 25 are rotatably connected to the driven plate 24 and the slider 26, respectively.

[0050] The slider 26 has a pulley 31 mounted on its side via a connecting arm 30. The pulley 31 abuts against a limiting plate 32 fixed on the vertical plate 2. The limiting plate 32 has a vertical section 3201 and an inclined section 3202.

[0051] The elastic connection structure includes a crossbar 28 fixedly mounted on the cross plate 19 via a first protrusion 1901, a second protrusion 2601 fixed on the slider 26 and slidably connected to the crossbar 28, and a cylindrical spring 29 sleeved on the outer periphery of the crossbar 28. One end of the cylindrical spring 29 is connected to the first protrusion 1901, and the other end is connected to the second protrusion 2601.

[0052] When the gear 9 engages with the rack plate 10, the pulley 31 rolls along the vertical section 3201. During this process, the slider 26 does not slide on the horizontal plate 19. After the gear 9 disengages from the rack plate 10, the pulley 31 will roll along the inclined section 3202. Correspondingly, the slider 26 will move aside and slide away from the second threaded sleeve 27 on the horizontal plate 19. The cylindrical spring 29 is compressed, and the slider 26 pushes the driven plate 24 through the connecting rod 25, causing the driven tube 20 to slide downward on the sleeve 15, so that the conical member 22 enters the center hole of the armature, which has a fastening effect on the armature.

[0053] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0054] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An assembly device for a high-pressure fuel injection armature, comprising a support base (1) and a vertical plate (2) fixedly mounted on the support base (1). characterized in that Also includes: The assembly plate (6) is movably mounted on the support base (1) and connected to the annular guide structure mounted on the support base (1). The assembly plate (6) is also connected to a sliding fitting mechanism mounted on the vertical plate (2). The sliding fitting mechanism is connected to a threaded drive mechanism mounted on the vertical plate (2). The support mechanism is provided in two symmetrical sets on the assembly plate (6) for supporting the armature. The threaded drive mechanism can drive the sliding engagement mechanism to lower the assembly plate (6) and trigger the support mechanism. The sliding engagement mechanism can drive the assembly plate (6) to rotate so that the guide hole and guide groove on the armature and the injector correspond. A tapered member (22) is movably mounted on the assembly plate (6) and connected to an elastic driven mechanism installed between the threaded drive mechanism and the sliding fitting mechanism. The elastic driven mechanism is triggered after the support mechanism has finished moving to drive the tapered member (22) into the center hole of the armature and perform a fastening action on the armature located on the support mechanism. The annular guide structure includes an annular guide rail (3) fixedly installed on the support base (1), two guide seats (4) slidably fitted in the annular guide rail (3), and two upright arms (5) fixedly installed on the two guide seats (4) respectively. The assembly plate (6) is slidably connected to the two upright arms (5). The supporting mechanism includes a first lead screw (8) rotatably mounted on the assembly plate (6), a transverse plate (12) slidably disposed on the assembly plate (6), and a first threaded sleeve (18) sleeved on the first lead screw (8) and fixedly connected to the transverse plate (12). The first threaded sleeve (18) is threadedly connected to the first lead screw (8), and a support member (7) is fixedly installed at the end of the transverse plate (12) away from the first threaded sleeve (18). The support member (7) is arranged in an arc shape. The first lead screw (8) is connected to a gear (9) rotatably mounted on the assembly plate (6) through a transmission belt (11). The gear (9) cooperates with the rack plate (10) fixed on the vertical arm (5). The sliding fitting mechanism includes a rotating shaft (14) rotatably mounted on the vertical plate (2), a sleeve (15) slidably fitted with the rotating shaft (14), and a first drive motor (13) mounted on the vertical plate (2). The rotating shaft (14) is connected to the output end of the first drive motor (13), and a limiting structure is provided between the sleeve (15) and the rotating shaft (14). One end of the sleeve (15) away from the first drive motor (13) is fixed to the assembly plate (6), and the sleeve (15) is also connected to the threaded drive mechanism. The limiting structure includes two strip-shaped protrusions (1401) formed on the outer wall of the rotating shaft (14) and two strip-shaped grooves provided on the inner wall of the sleeve (15). The strip-shaped grooves are adapted to the strip-shaped protrusions (1401), and the strip-shaped protrusions (1401) are parallel to the central axis of the rotating shaft (14). The threaded drive mechanism includes a second lead screw (17) rotatably mounted on the vertical plate (2), a second threaded sleeve (27) sleeved on the second lead screw (17) and threadedly connected to the second lead screw (17), and a horizontal plate (19) disposed between the second threaded sleeve (27) and the sleeve (15). The vertical plate (2) is also equipped with a second drive motor (16), the output end of the second drive motor (16) is connected to the second lead screw (17), the horizontal plate (19) is fixedly connected to the second threaded sleeve (27), and rotatably connected to the sleeve (15).

2. An apparatus for assembling a high pressure fuel injection armature according to claim 1, wherein The elastic driven mechanism includes a slider (26) slidably disposed on the horizontal plate (19), a guide plate (23) fixed on the horizontal plate (19), a driven plate (24) slidably disposed on the guide plate (23), and a driven tube fitting (20) slidably sleeved on the sleeve (15). The slider (26) is connected to an elastic connection structure provided on the horizontal plate (19). The driven tube (20) is fixed to the tapered part (22) through the connecting rod (21). The connecting rod (21) is slidably connected to the assembly plate (6). A connecting rod (25) is also provided between the driven plate (24) and the slider (26). The two ends of the connecting rod (25) are rotatably connected to the driven plate (24) and the slider (26) respectively. The slider (26) has a pulley (31) mounted on its side via a connecting arm (30). The pulley (31) abuts against a limiting plate (32) fixed on the vertical plate (2). The limiting plate (32) has a vertical section (3201) and an inclined section (3202).

3. An assembly apparatus for a high pressure fuel injection armature according to claim 2, wherein The elastic connection structure includes a crossbar (28) fixedly mounted on the cross plate (19) by a first protrusion (1901), a second protrusion (2601) fixed on the slider (26) and slidably connected to the crossbar (28), and a cylindrical spring (29) sleeved on the outer periphery of the crossbar (28). One end of the cylindrical spring (29) is connected to the first protrusion (1901), and the other end is connected to the second protrusion (2601).

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