Flow metering valve structure of fuel injection pump

Abstract

The utility model discloses a flow metering valve structure of a fuel injection pump, and relates to the technical field of engines. The connecting plug is connected with the metering valve body through a wire; the connecting plug comprises a shell, a conductive piece is installed in the shell, and the wire penetrates through the shell and corresponds to the conductive piece in the shell. The wire comprises a copper wire and an insulating sleeve, and when the wire moves, the conductive piece is always attached to the copper wire in the insulating sleeve. According to the flow metering valve structure of the fuel injection pump, due to the fact that the connector terminal and the metering valve are connected together through the wire, vibration cannot be transmitted to the connector terminal through the metering valve, the technical problem that when an existing metering valve of the fuel injection pump is used, loosening (poor contact) is prone to occurring at the position of an interface is effectively solved, and the service life of the metering valve is prolonged. Therefore, the relative independence between the connector terminal and the metering valve is realized, and the stability of the wiring terminal in use is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to a flow metering valve structure for an injection pump. Background Art

[0002] The common design of the fuel metering solenoid valve for automobile engines is that there is a raised part at one end of the valve plate, a spring is installed on the raised part, and a return spring seat is set at the other end of the spring. The solenoid valve is normally open, that is, the needle valve head presses against the valve plate, the valve plate and the valve seat sealing surface are separated, and the fuel can flow out through the channel between the valve plate and the valve seat;

[0003] At present, a Chinese patent with the existing patent application number of "CN202020552052.0" discloses a fuel metering solenoid valve for automobile engines, including a valve seat, the valve seat is cylindrical with a cavity inside and a convex surface at one end, and a valve plate is assembled on the convex end through a leaf spring, one end of the leaf spring is fixed on the valve seat, and the other end supports the valve plate. The leaf spring is in a circular ring shape as a whole, and at least six fixed claws are evenly arranged on the edge of one end, and at least three supporting claws are evenly arranged on the edge of the other end. The leaf spring is welded to the valve seat through six fixed claws, and the three supporting claws are in contact with the chamfered surface of the edge of the valve plate away from the valve seat, supporting the valve plate so that it does not slide in the circumferential direction; the side of the valve plate in contact with the valve seat realizes relative movement with the valve seat under the elastic force of the supporting claws, and the valve seat is sealed or opened. Although the structure of the metering valve can be made compact, due to the fixed connection between the electric plug and the valve body of the metering valve, when the metering valve is hit or shakes, the two will shake synchronously.

[0004] However, during the implementation of the above technical solution, it was found that there were at least the following technical problems:

[0005] The interface is prone to looseness (poor contact): Fig. 9 As shown, the existing fuel injection pump flow metering valve, the connector terminal and the metering valve are integrated. This results in restrictions on the layout of the fuel injection pump. For places close to the vibration source, the connector terminal of the oil pump flow metering valve is greatly affected by the vibration source, and problems such as poor contact often occur. It can only be arranged in a place far away from the vibration source; secondly, after the metering valve is modified, the connector and the metering valve are connected by a wire. Although the problem of synchronous vibration of the metering valve and the plug is solved, in order to improve the convenience and adaptability of the metering valve installation (convenient for different equipment), the actual length of the wire is greater than the required length, which also brings certain troubles, that is, the wires are entangled with each other and scattered. For this reason, we propose a fuel injection pump flow metering valve structure. Utility Model Content

[0006] 1. Technical issues to be resolved

[0007] In view of the deficiencies in the prior art, the utility model provides a fuel injection pump flow metering valve structure to solve the technical problem that when the existing fuel injection pump flow metering valve is in use, since the connector terminal and the metering valve are integrated, the two will vibrate synchronously, resulting in easy loosening (poor contact) at the interface.

[0008] (II) Technical solution

[0009] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0010] A fuel injection pump flow metering valve structure, the metering valve structure comprising:

[0011] Metering valve body;

[0012] A plug connector, the plug connector is connected to the metering valve body through a wire and is connected to an external controller through the plug connector;

[0013] The plug connector includes a shell, and a conductive member is installed inside the shell, and the wire passes through the shell and corresponds to the conductive member inside the shell;

[0014] The conductor comprises a copper wire and an insulating sleeve covering the outside of the copper wire, and a sliding groove is provided on the surface of the insulating sleeve. When the conductor moves, the conductive part moves along the sliding groove and always fits with the copper wire inside the insulating sleeve.

[0015] Preferably, two side strips are installed on the surface of the insulating sleeve, and the side strips are located on the inner walls on both sides of the slide groove, a buckle chain is installed between the two side strips, and the two side strips are fitted together by the buckle chain, and the buckle chain is divided into two structures that can be connected to each other, a columnar strip and a docking card strip, and the columnar strip and the docking card strip are respectively connected to the two side strips, and when the columnar strip and the docking card strip are docked with each other, the slide groove on the surface of the insulating sleeve is closed.

[0016] Preferably, the docking card strip has an embedding groove with an arc-shaped cross section on the side facing the columnar strip, and the columnar strip also has an arc-shaped cross section, so the docking card strip can be connected to the columnar strip through the embedding groove, so that the two side strips can fit each other.

[0017] Preferably, the conductive part includes a copper sheet connected to the shell, and a center pin is connected to the side of the copper sheet facing the conductor, an arc-shaped bonding sheet is connected to the front end of the center pin, and the bonding sheet is located between the insulating sleeve and the copper wire, so that the bonding sheet can be bonded to the copper wire inside the conductor.

[0018] Preferably, a baffle is provided on each side of the center pin, so that the side strip can be confined in the gap between the baffle and the center pin.

[0019] Preferably, a rotatable connecting wheel is connected inside the housing, and the wire passes through the gap between the connecting wheel and the conductive part;

[0020] Among them, the wire enters the housing from the rear end of the housing, and after bypassing the connecting wheel, it passes out of the rear end of the housing.

[0021] Preferably, one end of the wire that bypasses the connecting wheel is connected with a wire clamp, and the wire clamp can slide on the wire;

[0022] Among them, the wire clamp includes a U-shaped wire buckle, and a pressing piece is provided at each of the upper and lower ends of the wire buckle, and the wire can be folded in half by driving the pressing piece.

[0023] Preferably, a soft magnet is connected to the inner side of the wire. When the wire is folded in half, the folded part of the wire is attracted together by the soft magnet.

[0024] (III) Beneficial effects

[0025] 1. Since the wire is used to connect the plug-in connector terminal and the metering valve together, vibration cannot be transmitted from the metering valve to the plug-in connector terminal. Therefore, the technical problem that the interface of the existing fuel injection pump flow metering valve is prone to looseness (poor contact) during use is effectively solved, and the relative independence between the plug-in connector terminal and the metering valve is realized, ensuring the stability of the wiring terminal during use.

[0026] 2. Since the length of the wire is reduced by adopting a folded form, and then the conductive part inside the housing electrically connects the plug and the wire together, and the conductive part can slide outside the wire and always connect with the wire inside the wire, the technical problem of the scattered distribution of the wire after the improvement of the metering valve is effectively solved, and the retraction and release of the wire are realized. At the same time, since the retraction and release are carried out in a folded form, the weight distribution of the wire is more uniform, and it will not cause the situation of concentrated weight distribution like using cable ties. Secondly, the applicability of the device can also be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly and implement it according to the content of the specification, the following takes the preferred embodiment of the present invention and combines the accompanying drawings to describe in detail as follows.

[0028] Figure 1 It is the overall structure diagram of the embodiment of the present invention;

[0029] Figure 2 It is the schematic diagram of the wire folding in half in the embodiment of the present invention;

[0030] Figure 3 It is the structure diagram after the housing is opened in the embodiment of the present invention;

[0031] Figure 4 This is an exploded structural diagram of the plug connector in the embodiment of the utility model;

[0032] Figure 5 It is a partial cross-sectional view of the wire and the conductive member in the embodiment of the utility model;

[0033] Figure 6 This is a schematic diagram of the movement direction of the wire edge strip in the embodiment of the utility model;

[0034] Figure 7 A partial cross-sectional view of a wire in an embodiment of the utility model;

[0035] Figure 8 This is a structural diagram of the wire clamp in the embodiment of the utility model;

[0036] Fig. 9 It is the structural diagram of the existing metering valve.

[0037] Legend:

[0038] 1. Metering valve body;

[0039] 2. Conductor; 21. Copper wire; 22. Insulating sleeve; 23. Buckle chain; 231. Columnar strip; 232. Butt-joint strip; 24. Side strip;

[0040] 3. Plug connector; 31. Lower housing; 32. Upper housing; 33. Connecting wheel; 34. Conductive member; 341. Copper sheet; 342. Center pin; 343. Stopper; 344. Fitting sheet;

[0041] 4. Wire clamp; 41. Wire buckle; 42. Pressing piece. DETAILED DESCRIPTION

[0042] The embodiment of the present application provides a fuel injection pump flow metering valve structure, which effectively solves the technical problem that the interface of the existing fuel injection pump flow metering valve is prone to loosening (poor contact) when in use. When the existing fuel injection pump flow metering valve is in use, since the connector terminal and the metering valve are connected together by a wire, the vibration cannot be transmitted to the plug-in terminal through the metering valve, thereby achieving relative independence between the connector terminal and the metering valve, and ensuring the stability of the terminal when in use; since the length of the wire is reduced by a folding form, the plug connector and the wire are electrically connected together by a conductive part inside the shell, and the conductive part can slide on the outside of the wire and is always connected to the wire inside the wire, thereby achieving the retraction and release of the wire. At the same time, since the retraction and release is carried out in a folding form, the weight distribution of the wire is more even, and there will be no concentrated weight distribution like using a cable tie to tie it up. Secondly, it can also improve the applicability of the device.

[0043] Example 1

[0044] The technical solution in the embodiment of the present application effectively solves the technical problem that the interface of the existing fuel injection pump flow metering valve is prone to loosening (poor contact) when in use. The overall idea is as follows:

[0045] In view of the problems existing in the prior art, the utility model provides a fuel injection pump flow metering valve structure, which mainly includes three parts, one of which is a metering valve body 1. Since the improvement point of the present application is not on the metering valve, the structure thereof is not adjusted, and therefore any common metering valve body 1 on the market can be used; the other part is a plug connector 3, which is used to connect the metering valve to a controller on a car, so as to facilitate the controller to control the work of the metering valve; the last part is a "wire 2", which is also the focus of improvement of the present application, because the traditional plug connector 3 and the metering valve are integrated, which not only restricts the arrangement of the fuel injection pump, but also the plug connector 3 is close to the vibration source, causing it to be greatly affected by the vibration source, and often has problems such as poor contact, and can only be arranged in a place far away from the vibration source;

[0046] In order to solve this problem, a wire 2 is provided between the metering valve body 1 and the plug connector 3, so that the plug connector 3 at the metering valve can be lengthened and fixed at a position away from the vibration source, thereby ensuring a reliable connection between the injection pump and the plug connector 3.

[0047] Example 2

[0048] Based on Example 1, the present application embodiment provides a feasible solution for the retraction and extension of the wire, and the overall idea is as follows:

[0049] Based on the above structure, the connection mode between the wire 2 and the plug connector 3 is adjusted, and the specific improvements are as follows:

[0050] like Figure 4 As shown, the plug connector 3 includes an upper shell 32 and a lower shell 31 corresponding to each other, and when the two shells are closed, a complete shell is formed, and a group of conductive members 34 and a connecting wheel 33 are installed inside the shell (which is a part of the plug connector 3), wherein the number of the conductive members 34 is consistent with the number of the wires 2, and the wires 2 enter the shell from the rear end of the shell, and pass through the rear end of the shell after bypassing the connecting wheel 33, as shown in FIG. Figure 3 As shown, the wire 2 entering the shell not only corresponds to the conductive member 34 inside the shell (the wire 2 passes through the gap between the connecting wheel 33 and the conductive member 34), but is also electrically connected to the conductive member 34. Figure 5This ensures that no matter how the wire 2 moves in the housing, the electrical signal can be transmitted to the wire 2 through the conductive member 34, and the conductive member 34 is connected to the copper column in the housing, so that when the plug connector 3 is connected to the controller, the controller can be electrically connected through the copper column-conductive member 34-wire 2-metering valve body 1.

[0051] In order to ensure that the conductive member 34 can fit the copper wire 21 inside the conductive wire 2 no matter how it moves, an insulating sleeve 22 is wrapped around the outside of the copper wire 21, and the surface of the insulating sleeve 22 has a sliding groove in the same direction as its extension, such as Figure 3-Figure 5 As shown, the conductive member 34 is inserted into the slide slot, so when the wire 2 moves, the conductive member 34 moves synchronously along the slide slot and fits with the copper wire 21 leaking out of the slide slot, so that the conductive member 34 can always fit with the copper wire 21 inside the wire 2, as shown in FIG. Figure 5 and Figure 6 As shown, however, it can be seen from the above that there is still a problem, that is, impurities will also pass through the broken chute and fit with the copper wire 21. Although the control voltage of the metering valve is very small and far from the voltage that can cause harm to the human body, it is impossible to prevent other impurities from contacting the copper wire 21. In order to solve this problem, that is, to prevent impurities from entering the inside of the wire 2 through the chute (contacting the copper wire 21 inside the wire 2), the following technical solution is adopted:

[0052] We connect a side strip 24 to each side edge of the chute, such as Figure 5 As shown, the side strips 24 can be used to control the sliding grooves to fit together. Although the sliding groove outside the wire 2 can be sealed, the wire 2 needs to be able to restore to its original open state when it contacts the conductive member 34. Therefore, we decided to design the side strips 24 and the conductive member 34 into a "zipper" structure, that is, a buckle chain 23 is installed between the two side strips 24, and the two side strips 24 are fitted together through the buckle chain 23, and the buckle chain 23 is divided into two structures that can be connected to each other, a columnar strip 231 and a docking card strip 232, and the columnar strip 231 and the docking card strip 232 are respectively connected to the two side strips 24, and when the columnar strip 231 and the docking card strip 232 are docked with each other, the sliding groove on the surface of the insulating sleeve 22 is closed.

[0053] The side of the docking card strip 232 facing the columnar strip 231 has an embedding groove with a circular arc cross section, and the cross section of the columnar strip 231 is also circular arc-shaped, so the docking card strip 232 can be connected to the columnar strip 231 through the embedding groove, so that the two side strips 24 can fit each other. In order to allow the conductive member 34 to cooperate with the buckle chain 23, the conductive member 34 includes a copper sheet 341 connected to the shell, and the side of the copper sheet 341 facing the conductor 2 is connected to a center pin 342, and the front end of the center pin 342 is connected to an arc-shaped bonding sheet 344, and the bonding sheet 344 is located between the insulating sleeve 22 and the copper wire 21, as shown in FIG. Figure 5 As shown, the copper wire 21 inside the conductor 2 can be fitted with the fitting sheet 344 ; and a blocking sheet 343 is provided on each side of the center pin 342 , so that the side strip 24 can be confined in the gap between the blocking sheet 343 and the center pin 342 .

[0054] like Figure 6 As shown, when the conductive member 34 and the side strip 24 move relative to each other, the side strip 24 moves along Figure 6 As the arrow shown moves, the two side strips 24 are separated by the center pin 342, and after passing the center pin 342, they are merged together by the squeezing action of the baffle 343, thereby ensuring that only the side strip 24 corresponding to the center pin 342 is open, and the other positions are in a closed state.

[0055] like Figure 3 and Figure 4 As shown, in order to facilitate the folding of the wire 2 and keep the wires 2 in contact with each other after being folded, a wire clamp 4 is connected to one end of the wire 2 passing through the connecting wheel 33, and the wire clamp 4 can slide on the wire 2, so that the head of the wire 2 will not move at will after being folded. In order to facilitate the wires 2 to be in contact with each other after being folded, a soft magnet is connected to the inner side of the wire 2, so that when the wire 2 is folded, the folded part of the wire 2 can be attracted together by the soft magnet;

[0056] The wire clamp 4 includes a U-shaped wire buckle 41, which is buckled with the folded wire 2 through the opening of the wire buckle 41. In order to facilitate manual operation by the user, a pressing piece 42 is respectively provided at the upper and lower ends of the wire buckle 41.

[0057] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A fuel injection pump flow metering valve structure, characterized in that: The structure of the metering valve includes: A metering valve body (1); A plug connector (3), and the plug connector (3) is connected to the metering valve body (1) through a wire (2); Wherein, the plug connector (3) includes a housing, and a conductive member (34) is installed inside the housing. The wire (2) passes through the housing and corresponds to the conductive member (34) inside the housing; The wire (2) includes copper wires (21) and an insulating sleeve (22) coated outside the copper wires (21). A chute is provided on the surface of the insulating sleeve (22). When the wire (2) moves, the conductive member (34) moves along the chute and always fits with the copper wires (21) inside the insulating sleeve (22).

2. A fuel injection pump flow metering valve structure as claimed in claim 1, characterized in that: Two side strips (24) are installed on the surface of the insulating sleeve (22), and the side strips (24) are located on the inner walls of both sides of the chute. A fastening chain (23) is installed between the two side strips (24), and the two side strips (24) are fitted together through the fastening chain (23); Wherein, the fastening chain (23) includes columnar strips (231) and docking strips (232) that can be mutually docked. The columnar strips (231) and the docking strips (232) are respectively connected to the two side strips (24). When the columnar strips (231) and the docking strips (232) are mutually docked, the chute on the surface of the insulating sleeve (22) is closed.

3. A fuel injection pump flow metering valve structure as claimed in claim 2, characterized in that: An embedding groove is provided on one side of the docking strip (232) facing the columnar strip (231), and the docking strip (232) is docked with the columnar strip (231) through the embedding groove.

4. A fuel injection pump flow metering valve structure as claimed in claim 2, characterized in that: The conductive member (34) includes a copper sheet (341) connected to the housing, and a center pin (342) is connected to one side of the copper sheet (341) facing the wire (2); Wherein, a fitting piece (344) is connected to the front end of the center pin (342), and the fitting piece (344) fits with the copper wires (21) inside the wire (2).

5. A fuel injection pump flow metering valve structure as claimed in claim 4, characterized in that: One retaining piece (343) is provided on each side of the center pin (342), and the side strip (24) is located in the gap between the retaining piece (343) and the center pin (342).

6. A fuel injection pump flow metering valve structure as claimed in claim 1, characterized in that: A rotatable connecting wheel (33) is connected inside the housing, and the wire (2) passes through the gap between the connecting wheel (33) and the conductive member (34); Wherein, the wire (2) enters the housing from the rear end of the housing, and after bypassing the connecting wheel (33), it exits from the rear end of the housing.

7. A fuel injection pump flow metering valve structure as claimed in claim 6, characterized in that: One end of the wire (2) bypassing the connecting wheel (33) is connected to a wire clamp (4), and the wire clamp (4) can slide on the wire (2); Wherein, the wire clamp (4) includes a U-shaped wire buckle (41), and a pressing piece (42) is provided at each of the upper and lower ends of the wire buckle (41). The wire (2) can be folded by driving the pressing piece (42).

8. A fuel injection pump flow metering valve structure as claimed in claim 1, characterized in that: A soft magnet is connected to the inner side of the wire (2). When the wire (2) is folded, the folded part of the wire (2) is attracted together by the soft magnet.

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