Secondary locking mechanism of engine wire harness connector

Abstract

The utility model relates to a secondary locking mechanism of an engine wire harness connector, which comprises an engine wire harness, the wire harness is inserted in a connector sheath, the end part of the wire harness is fixedly connected with a connector terminal, a plurality of inclined limiting elastic sheets are formed on the outer side wall of the upper middle part of the connector terminal, the limiting elastic sheets abut against a retaining block, and the retaining block is fixedly connected with the connector terminal. The limiting elastic sheet is formed on the inner wall of the connector sheath, the end part of the connector terminal is sleeved with a locking head, an insertion hole opposite to the connector terminal is formed in the head part of the locking head, a retaining ring is formed on the inner wall of the tail part of the locking head, and the rear end of the retaining ring is inserted and fixed in the connector sheath; a plurality of limiting protrusions are formed on the outer side wall of the front end of the connector terminal and abut against the front end face of the retaining ring. The locking mechanism has multiple locking functions, solves the hidden danger and risk that the terminal is withdrawn when the engine wire harness is subjected to abnormal external force, and improves the reliability of the engine wire harness assembly and even the whole electric control system.

Description

Technical fields:

[0001] This utility model relates to the technical field of connectors, and more specifically to a secondary locking mechanism for an engine wiring harness connector. Background technology:

[0002] Conventional electronically controlled diesel engine wiring harness connectors have a single-locking function for the terminal pairs, such as... Figure 1 As shown, a wire harness 1 and a connector terminal 3 are fixed together inside the connector sleeve 2. The connector terminal 3 has an angled limiting spring 31 that abuts against a stop block 21 inside the connector sleeve 2 to achieve a locking mechanism, thus preventing the wire harness 1 from detaching from the connector sleeve 2. However, when the wire harness is subjected to abnormal external force, the limiting spring 31 may deform, leading to the potential risk of the connector terminal detaching. When the terminal inside the connector sleeve detaches, sensors will be unable to transmit signals to the ECU. For example, the water temperature sensor will be unable to transmit analog signals to the ECU for processing and calculation. Actuators will be unable to execute drive signals and commands transmitted by the ECU; for example, the electronic fuel injector will be unable to execute injection commands. This will cause the entire electronic control system to fail, accompanied by the ECU reporting fault codes, illuminating the malfunction indicator lamp, and limiting the engine's power and torque system responses, ultimately resulting in the engine becoming unusable. Therefore, an effective locking connector structure needs to be designed. Utility Model Content:

[0003] The purpose of this utility model is to address the shortcomings of existing technologies by providing a secondary locking mechanism for engine wiring harness connectors. This mechanism has multiple locking functions, which solves the hidden dangers and risks of terminal disengagement when the engine wiring harness is subjected to abnormal external forces, thereby improving the reliability of the engine wiring harness assembly and even the entire electronic control system.

[0004] A secondary locking mechanism for an engine wiring harness connector includes an engine wiring harness inserted into a connector sleeve. A connector terminal is fixedly connected to the end of the wiring harness. Several obliquely positioned limiting springs are formed on the outer wall of the upper middle portion of the connector terminal, abutting against a backstop block. The limiting springs are formed on the inner wall of the connector sleeve. A locking head is fitted onto the end of the connector terminal. The head of the locking head has a corresponding insertion hole. A backstop ring is formed on the inner wall of the tail portion of the locking head, with its rear end inserted and fixed within the connector sleeve. Several limiting protrusions are formed on the outer wall of the front end of the connector terminal, abutting against the front end face of the backstop ring.

[0005] Preferably, the locking head consists of a front cap-shaped limiting head and a rear locking sleeve, with the limiting head and locking sleeve fixed together; the insertion hole is formed on the limiting head, and the anti-reverse ring is formed on the locking sleeve.

[0006] Preferably, an inner connecting sleeve is formed on the rear end face of the limiting head, and an outer connecting sleeve is formed on the front end face of the locking sleeve, with the inner connecting sleeve screwed and fixed inside the outer connecting sleeve.

[0007] Preferably, the front end face of the connector terminal abuts against the bottom surface inside the limiting head.

[0008] Preferably, the outer wall of the locking head and the outer wall of the connector sheath are on the same cylindrical surface.

[0009] Preferably, the wire harness is fitted with a rubber sealing post, and the outer wall of the rubber sealing post is formed with several annular sealing lips, which press against the inner wall of the connector sheath.

[0010] The beneficial effects of this utility model are as follows:

[0011] This locking mechanism has multiple locking functions, which solves the hidden dangers and risks of terminal dislodgement when the engine wiring harness is subjected to abnormal external force, and improves the reliability of the engine wiring harness assembly and even the entire electronic control system. Attached image description:

[0012] Figure 1 This is a cross-sectional schematic diagram of an existing single-locking connector;

[0013] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0014] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

[0015] In the diagram: 1. Wire harness; 2. Connector sleeve; 21. Anti-reverse block; 3. Connector terminal; 31. Limiting spring; 32. Limiting protrusion; 4. Locking head; 41. Limiting head; 411. Socket; 412. Inner connecting sleeve; 42. Locking sleeve; 421. Anti-reverse ring; 422. Outer connecting sleeve; 5. Rubber sealing post sleeve; 51. Sealing lip. Detailed implementation method:

[0016] Example: See Figures 2 to 3As shown, a secondary locking mechanism for an engine wiring harness connector includes an engine wiring harness 1, which is inserted into a connector sleeve 2. A connector terminal 3 is fixedly connected to the end of the wiring harness 1. Several obliquely placed limiting springs 31 are formed on the outer wall of the upper middle part of the connector terminal 3. The limiting springs 31 abut against a backstop block 21. The limiting springs 31 are formed on the inner wall of the connector sleeve 2. A locking head 4 is sleeved on the end of the connector terminal 3. The head of the locking head 4 is formed with a socket 411 opposite to the connector terminal 3. A backstop ring 421 is formed on the inner wall of the tail of the locking head 4. The rear end of the backstop ring 421 is inserted and fixed in the connector sleeve 2. Several limiting protrusions 32 are formed on the outer wall of the front end of the connector terminal 3. The limiting protrusions 32 abut against the front end face of the backstop ring 421.

[0017] The locking head 4 consists of a front cap-shaped limiting head 41 and a rear locking sleeve 42, with the limiting head 41 and the locking sleeve 42 fixed together. The insertion hole 411 is formed on the limiting head 41, and the anti-reverse ring 421 is formed on the locking sleeve 42. The locking head 4 adopts a split structure, which facilitates the installation of the head of the connector terminal 3 into the locking head 4.

[0018] The limiting head 41 has an inner connecting sleeve 412 formed on its rear end face, and the locking sleeve 42 has an outer connecting sleeve 422 formed on its front end face. The inner connecting sleeve 412 is screwed and fixed inside the outer connecting sleeve 422. The locking head 4 with threaded connection is convenient for assembly and disassembly.

[0019] The front end face of the connector terminal 3 abuts against the bottom surface inside the limiting head 4. The locking head 4 can not only allow the connector terminal 3 to be pulled out of the connector sleeve 2, but also restrict the axial movement of the connector terminal 3 within the connector sleeve 2.

[0020] The outer wall of the locking head 4 and the outer wall of the connector sleeve 2 are on the same cylindrical surface, which facilitates the installation and connection of the connector.

[0021] The wire harness 1 is fitted with a rubber sealing post sleeve 5. Several annular sealing lips 51 are formed on the outer wall of the rubber sealing post sleeve 5. The sealing lips 51 press against the inner wall of the connector sheath 2, which can provide waterproof function for the connector.

[0022] Working principle: This application proposes a secondary locking mechanism for engine wiring harness connectors, which supplements the existing primary locking mechanism. A locking head 4 is added to the primary locking mechanism. The locking head 4 is first installed together with the connector terminal 3, and then the locking head 4 is installed onto the connector sheath 2. The anti-return ring 421 inside the locking head 4 and the upper limit protrusion 32 of the connector terminal 3 form a second locking structure, thereby solving the hidden danger and risk of the connector terminal 3 coming off when the engine wiring harness is subjected to abnormal external force.

[0023] The embodiments described herein are illustrative and not intended to limit the scope of the invention. Any person skilled in the art can modify the embodiments without departing from the spirit and scope of the invention; therefore, the scope of protection of the invention should be as set forth in the claims.

Claims

1. A secondary locking mechanism for an engine wiring harness connector, comprising an engine wiring harness (1), the wiring harness (1) being inserted into a connector sleeve (2), a connector terminal (3) being fixedly connected to the end of the wiring harness (1), a plurality of obliquely placed limiting springs (31) being formed on the outer side wall of the upper middle part of the connector terminal (3), the limiting springs (31) abutting against a stop block (21), and the limiting springs (31) being formed on the inner wall of the connector sleeve (2), characterized in that: A locking head (4) is fitted onto the end of the connector terminal (3). The head of the locking head (4) is formed with a socket (411) opposite to the connector terminal (3). A backstop ring (421) is formed on the inner wall of the tail of the locking head (4). The rear end of the backstop ring (421) is inserted and fixed inside the connector sleeve (2). Several limiting protrusions (32) are formed on the outer wall of the front end of the connector terminal (3). The limiting protrusions (32) abut against the front end face of the backstop ring (421).

2. An engine harness connector secondary locking mechanism as described in claim 1, wherein: The locking head (4) consists of a front cap-shaped limiting head (41) and a rear locking sleeve (42), with the limiting head (41) and the locking sleeve (42) fixed together; the insertion hole (411) is formed on the limiting head (41), and the anti-reverse ring (421) is formed on the locking sleeve (42).

3. An engine harness connector secondary locking mechanism as described in claim 2, wherein: The limiting head (41) has an inner connecting sleeve (412) formed on its rear end face, and the locking sleeve (42) has an outer connecting sleeve (422) formed on its front end face. The inner connecting sleeve (412) is screwed and fixed inside the outer connecting sleeve (422).

4. The secondary lock mechanism for an engine harness connector of claim 2, wherein: The front end face of the connector terminal (3) abuts against the bottom surface inside the limiting head (41).

5. The secondary lock mechanism for an engine harness connector of claim 1, wherein: The outer wall of the locking head (4) and the outer wall of the connector sleeve (2) are on the same cylindrical surface.

6. An engine harness connector secondary locking mechanism as described in claim 1, wherein: The wire harness (1) is fitted with a rubber sealing sleeve (5), and the outer wall of the rubber sealing sleeve (5) is formed with several annular sealing lips (51), which press against the inner wall of the connector sheath (2).

Images