An engine fuel injector terminal structure connected with a tapered snap ring

Abstract

The present application discloses an engine injector terminal structure with a tapered snap ring connection, comprising a cylindrical terminal cover with an arc-shaped notch on its exterior; a terminal plugged into the bottom of the terminal cover, with an annular groove on the exterior of the terminal post corresponding to the notch on the exterior of the terminal cover; and a snap ring plugged between the notch and the groove. The engine injector terminal structure with a tapered snap ring connection described in the present invention has the following advantages: first, the terminal cover and the terminal post are connected by a tapered interference fit, which not only effectively increases the contact area and conducts more current, but also uses a snap ring connection to ensure convenient and reliable connection, reduce assembly and maintenance time, and reduce the risk of short circuit and structural failure rate; second, the upper end of the terminal post and the interior of the terminal cover are both tapered structures, which are simple in structure and reduce the processing precision requirements.

Description

Technical Field

[0001] The invention relates to the technical field of engines, and in particular to an engine fuel injector terminal structure connected with a tapered clamp ring. Background Art

[0002] With the upgrading of emission and fuel consumption regulations, vehicles and engines generally adopt high-pressure common rail fuel injection systems. As a key component of the fuel injection system, the injector not only controls the atomization of the fuel, but also controls the amount of fuel injected. The amount of fuel injected is controlled by the on and off time of the injector solenoid valve. Therefore, the quality of the injector terminal structure is crucial to the engine fuel system.

[0003] The current injector terminal has the following disadvantages: First, because the injector terminal bolts need to be tightened, installation and maintenance are time-consuming and inconvenient to assemble and maintain; second, because the injector terminal bolts are small and the nut fixing space is small, high requirements are placed on the processing accuracy of the bolts and nuts; third, because the current that controls the on and off of the solenoid valve is only transmitted through the connecting piece, the contact area of ​​the connecting piece ring is small, so the conducted current is limited, and the risk of circuit breaker failure is high. For this reason, we propose an engine injector terminal structure with a conical retaining ring connection. Summary of the Invention

[0004] The main purpose of the present invention is to provide an engine fuel injector terminal structure connected with a tapered clamp ring, which can effectively solve the problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] An engine fuel injector terminal structure with a tapered snap ring connection, comprising:

[0007] The wiring cover is cylindrical and has an arc-shaped notch on the outside;

[0008] A terminal block is inserted into the bottom of the terminal cover, and an annular groove is formed on the outside of the terminal block and corresponds to the notch formed on the outside of the terminal cover; and

[0009] A snap ring is inserted between the notch and the groove.

[0010] Preferably, a disc-shaped connection seat is provided at the bottom of the terminal.

[0011] Preferably, the top of the terminal post and the interior of the terminal cover are both conical, and the conical surface at the top of the terminal post is interference fit with the bottom of the terminal cover.

[0012] Preferably, a welding point for welding the wiring harness is provided on the top of the wiring cover.

[0013] Preferably, the clamping ring includes a cross bar and limiting clamps connected to both ends of the cross bar, and the cross section of the limiting clamps is "S"-shaped.

[0014] Preferably, when the clamping ring is clamped on the outside of the wiring cover, the cross bar is inserted between the notch and the groove, and the limiting clips at both ends of the cross bar are sleeved on the outside of the wiring cover.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] First, the conical interference fit connection between the terminal cover and the terminal post not only effectively increases the contact area and conduction current, but also adopts a clamping ring connection to ensure convenient and reliable connection, reduce assembly and maintenance time, and reduce the risk of circuit breakage and structural failure.

[0017] Second, the upper end of the terminal and the inside of the terminal cover are both tapered, which is simple in structure and reduces the processing accuracy requirements;

[0018] Third, the wiring cover and the terminal post have an interference fit, the wiring cover is connected to the wiring harness through the top wiring harness connection weld, the lower end connection seat of the terminal post is connected to the solenoid valve through the connection weld, and the wiring cover and the terminal post are connected through a clamping ring, all of which ensure reliable connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is an overall structural diagram of an engine fuel injector terminal structure connected with a tapered snap ring according to the present invention;

[0020] Figure 2 This is a structural diagram of a conical snap ring connected engine fuel injector terminal structure of the present invention after the terminal cover and the terminal are separated;

[0021] Figure 3 A structural diagram of a snap ring in a conical snap ring-connected engine fuel injector terminal structure according to the present invention;

[0022] Figure 4 This is a cross-sectional view of a terminal cover and a terminal in an engine fuel injector terminal structure connected with a tapered snap ring according to the present invention.

[0023] In the figure: 1. Wiring cover; 2. Connecting socket; 3. Terminal; 4. Snap ring. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] Identical components are denoted by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to directions in the accompanying drawings, and the terms "bottom," "top," "inner," and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

[0026] Reference Figure 1-4 As shown, an engine fuel injector terminal structure with a tapered snap ring connection includes:

[0027] The wiring cover 1 is cylindrical and has an arc-shaped notch on its outside;

[0028] The terminal 3 is plugged into the bottom of the terminal cover 1, and an annular groove is formed on the outside of the terminal 3 and corresponds to the notch formed on the outside of the terminal cover 1; and

[0029] A snap ring 4 is inserted between the notch and the groove.

[0030] Reference Figure 2 As shown, a disc-shaped connection seat 2 is provided at the bottom of the terminal 3.

[0031] Reference Figure 2 and Figure 4 The top of the terminal 3 and the interior of the terminal cover 1 are both conical, and the conical surface of the top of the terminal 3 is interference fit with the bottom of the terminal cover 1.

[0032] Reference Figure 1 The top of the wiring cover 1 is provided with a welding point for welding the wiring harness.

[0033] Reference Figure 3 The clamping ring 4 includes a cross bar and a limit clamp connected to both ends of the cross bar, and the cross section of the limit clamp is "S" shaped.

[0034] Reference Figure 1 When the clamping ring 4 is clamped on the outside of the wiring cover 1, the cross bar is inserted between the notch and the groove, and the limiting clips at both ends of the cross bar are sleeved on the outside of the wiring cover 1.

[0035] Before use, first install the terminal 3 to the positive and negative poles of the injector battery solenoid valve, and weld the connecting seat 2 at the bottom of the terminal 3 to the solenoid valve. Then weld the wiring harness to the welding point on the top of the wiring cover 1 to connect the wiring harness to the welding point to complete the connection.

[0036] When in use, first cover the wiring cover 1 with the wiring harness on the top of the terminal 3 and press it so that the wiring cover 1 is sleeved on the outside of the terminal 3 to cover the terminal 3. When the terminal 3 is fully inserted into the wiring cover 1, the gap on the outside of the wiring cover 1 and the groove on the outside of the terminal 3 are at the same level. At this time, press the clamping ring 4 from the gap of the wiring cover 1 in the direction of the wiring cover 1 so that the limit clips at both ends of the crossbar pass through the gap and are sleeved on the side of the wiring cover 1 away from the gap. At the same time, the crossbar is inserted between the gap on the outside of the wiring cover 1 and the groove on the outside of the terminal 3, forming a Figure 1The shape shown in FIG. 1 limits the terminal 3 inserted into the wiring cover 1 , prevents the terminal 3 from being separated from the wiring cover 1 , and completes the connection between the terminal 3 and the wiring cover 1 .

[0037] Reduce assembly and maintenance time: The terminal cover 1 is interference-fitted with the terminal post 3 and fixed by a clamping ring 4, effectively reducing assembly and maintenance time;

[0038] Reliable connection: The wiring cover 1 and the terminal 3 have an interference fit to ensure a reliable connection; the wiring cover 1 is connected to the wiring harness through the top wiring harness connection weld to ensure a reliable connection; the lower end connection seat 2 of the terminal 3 is connected to the solenoid valve through the connection weld to ensure a reliable connection; the wiring cover 1 and the terminal 3 are connected by a clamping ring 4 to ensure a reliable connection.

[0039] Lowering the processing precision requirement: the upper end of the terminal 3 is a conical structure with a simple structure, which reduces the processing precision requirement; the inside of the terminal cover 1 is a conical structure, which reduces the processing precision requirement.

[0040] Effectively increase the contact area for current transmission: The current that controls the on and off of the solenoid valve is transmitted through the conical and cylindrical side connections, which effectively increases the contact area and the conduction current. At the same time, the wiring cover 1 and the terminal 3 are connected by the clamping ring 4, reducing the risk of circuit breakage and structural failure.

[0041] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An engine fuel injector terminal structure connected with a tapered snap ring, characterized in that: include: A cylindrical wiring cover (1) is provided with an arc-shaped notch on its exterior; A terminal (3) is plugged into the bottom of the terminal cover (1), and an annular groove is provided on the outside of the terminal (3) and corresponds to a notch provided on the outside of the terminal cover (1); and A snap ring (4) inserted between the notch and the groove; The top of the terminal post (3) and the interior of the terminal cover (1) are both conical, and the conical surface at the top of the terminal post (3) is interference-fitted with the bottom of the terminal cover (1); The clamping ring (4) comprises a cross bar and a limiting clamp connected to both ends of the cross bar, and the cross section of the limiting clamp is "S" shaped.

2. The engine fuel injector terminal structure with a tapered snap ring connection according to claim 1, characterized in that: A disc-shaped connecting seat (2) is provided at the bottom of the terminal post (3).

3. The engine fuel injector terminal structure with a tapered snap ring connection according to claim 1, characterized in that: The top of the wiring cover (1) is provided with welding points for welding the wiring harness.

4. The engine fuel injector terminal structure with a tapered snap ring connection according to claim 1, characterized in that: When the clamping ring (4) is clamped on the outside of the wiring cover (1), the crossbar is inserted between the notch and the groove, and the limiting clips at both ends of the crossbar are outside the wiring cover (1).

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