Adjustable terminal pin ejector

Abstract

The utility model discloses an adjustable terminal needle withdrawal device, including shell subassembly, internal component and effect rod subassembly, shell subassembly includes pressing pressure handle, and the bottom of pressing pressure handle is fixedly connected with the top of transmission pressure rod, and the protective housing is cylindrical, and the inside hollow structure is used for accommodating the upper structure of transmission pressure rod, internal component and effect rod subassembly, internal component includes the tablet, and the lower surface fixed connection of tablet starts the end of compression spring, and compression spring sleeve is connected in the upper portion of transmission pressure rod, and the tail end of compression spring is fixedly connected with the lower surface of spacing extrusion block, and the lower portion of intermediate wedge is fixedly connected in transmission pressure rod, and the inclined surface of intermediate wedge is contacted with the inclined surface of side wedge group and extrusion pressure. The utility model need not frequently change needle or prepare a plurality of different specifications needle withdrawal device, improve terminal dismounting efficiency, reduce the risk of terminal or connector damage caused by misoperation, satisfy the diversification demand of precision needle withdrawal tool in the process of automobile wiring harness maintenance and assembly.

Description

Technical Field

[0001] This utility model belongs to the technical field of automotive wiring harness connection equipment, specifically referring to an adjustable terminal pin retractor. Background Technology

[0002] With the booming development of the automotive industry, automotive wiring harnesses, as a key support for vehicle performance and safety, are becoming increasingly important. During the repair and assembly of automotive wiring harnesses, it is often necessary to remove terminals, such as when connectors are damaged or electrical functions need to be adjusted. Terminals and plugs are precision components, usually equipped with spring clips or locking mechanisms, which lock them in place after insertion, making them extremely difficult to remove. This necessitates specialized terminal removers for disassembly. Traditional removers are either only suitable for terminals with a fixed bore diameter or require changing the needle to adapt to multiple specifications. Given the diverse range of terminal models and specifications in the automotive industry, using only one type of remover or preparing multiple removers with different bore diameters for switching can easily lead to incorrect needle replacement, rendering the tool unusable and significantly reducing work efficiency. It also easily results in errors and waste, failing to meet the diverse needs for precision removers in automotive wiring harness repair and assembly. Utility Model Content

[0003] The purpose of this utility model is to provide an adjustable terminal pin remover that can adapt to various specifications of automotive wiring harness terminals without frequently changing pins or preparing multiple pin removers of different specifications. This improves terminal disassembly efficiency, reduces the risk of terminal or connector damage due to misoperation, and meets the diverse needs for precision pin removers in automotive wiring harness repair and assembly.

[0004] To achieve the above objectives, this utility model provides an adjustable terminal pin ejector, comprising a housing assembly, an internal assembly, and an actuating rod assembly. The housing assembly includes a pressing handle, a protective housing, a transmission rod, a limiting block, an actuating rod, a horizontal limiting block, and a vertical limiting block. The bottom of the pressing handle is fixedly connected to the top of the transmission rod. The protective housing is cylindrical with a hollow internal structure, used to accommodate the transmission rod, the internal assembly, and the upper structure of the actuating rod assembly. The top of the protective housing has a sliding hole adapted to the transmission rod, and the upper and middle parts of the inner wall of the protective housing are respectively provided with mounting bosses for fixing and limiting. The extrusion block and horizontal limiting block, and the vertical limiting block are located at the bottom of the protective shell; the internal components include a pressure plate, a compression spring, a middle wedge, a side wedge assembly, and a return spring. The lower surface of the pressure plate is fixedly connected to the starting end of the compression spring, which is sleeved on the upper part of the transmission pressure rod. The tail end of the compression spring is fixedly connected to the upper surface of the limiting extrusion block. The middle wedge is fixedly connected to the lower part of the transmission pressure rod and has an inverted conical block structure. The inclined surface of the middle wedge contacts and compresses the inclined surface of the side wedge assembly. The return spring is connected between the outer side of the side wedge assembly and the inner wall of the protective shell; the side wedge assembly forms the action rod assembly.

[0005] As a further embodiment of this utility model: the vertical limiting block is a circular ring structure, the diameter of its inner ring is larger than the diameter of the actuating rod, so as to facilitate the actuating rod to expand outward and change the original hole size, and adapt to terminal heads of different hole sizes for pin retraction. As a further embodiment of this utility model: the actuating rod assembly includes an inclined slide groove, a vertical fixing block, a reset spring sleeve assembly, and a pressure head. The actuating rod assembly is arc-shaped, with the pressure head located at the lowest end. The vertical fixing block is a fan-shaped structure located in the middle of the actuating rod assembly. The reset spring sleeve assembly is used to sleeve the reset spring.

[0006] As a further embodiment of this utility model: the reset spring is divided into upper and lower groups, each group consisting of three reset springs, which are evenly connected between the outer side of the side wedge block group and the inner wall of the protective shell.

[0007] As a further embodiment of this utility model: the actuating rod assembly comprises three rods, which are combined to form a cylindrical shape.

[0008] As a further embodiment of this utility model: the outer diameter of the operating surface of the pressing handle is larger than the opening at the top of the protective shell.

[0009] As a further embodiment of this invention, the bottom of the pressure head is provided with a smooth contact surface.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: Compared with the cumbersome operation of frequently changing tools or needles in traditional needle ejectors, this technical solution uses a combination of pressing handle, transmission rod, middle wedge, and side wedge group to expand the action rod outward and change the original hole size, adapting to different hole diameter models of terminal heads for needle ejection. This achieves rapid switching of needle inner diameter without disassembling or installing needle parts, shortening the needle ejection operation cycle of different hole diameter terminals, and is especially suitable for scenarios of continuous disassembly of multiple specifications of terminals in automotive wiring harness repair. Through the coordinated cooperation of limit block, return spring and compression spring, the action rod is stably fixed and quickly repositioned after use for easy next use, improving tool adaptability. This needle ejector pen integrates core components such as mounting shell, transmission rod, limit slider, wedge group, etc., with a compact overall structure, making it easy for operators to hold and use. The grip position can be adjusted according to the operator's usage habits, improving grip comfort and operation convenience. Improve terminal removal efficiency, reduce the risk of terminal or connector damage due to misoperation, and meet the diverse needs for precision pin removal tools in automotive wiring harness repair and assembly. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0012] Figure 2This is a schematic diagram of the internal structure of this utility model.

[0013] Figure 3 yes Figure 2 A schematic diagram of the three-dimensional structure.

[0014] Figure 4 This is a schematic diagram of the action rod assembly structure of this utility model.

[0015] Figure 5 yes Figure 4 A schematic diagram of the internal structure.

[0016] In the diagram: 1. Press handle, 2. Protective shell, 3. Actuating rod, 4. Transmission rod, 5. Limiting block, 6. Horizontal limiting block, 7. Vertical limiting block, 8. Return spring sleeve assembly, 201. Compression spring, 202. Middle wedge block, 203. Side wedge block assembly, 204. Return spring, 205. Pressure plate, 301. Inclined slide groove, 302. Vertical fixing block, 303. Press head. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] like Figures 1 to 5 As shown, the adjustable terminal pin ejector includes a housing assembly, an internal assembly, and an actuating rod assembly. The housing assembly includes a pressing handle 1, a protective housing 2, a transmission rod 4, a limiting block 5, an actuating rod 3, a horizontal limiting block 6, and a vertical limiting block 7. The bottom of the pressing handle 1 is fixedly connected to the top of the transmission rod 4, providing a point of force for the operator. Pressing downwards causes the transmission rod 4 to move synchronously. The outer diameter of the operating surface of the pressing handle 1 is slightly larger than the top opening of the protective housing 2, preventing the handle from being completely embedded inside the housing during pressing. It can be made of a non-slip material, with anti-slip textured surfaces on the top to improve grip stability. The protective housing 2 is cylindrical with a hollow interior, housing the transmission pressure rod 4, internal components, and the upper structure of the actuating rod assembly. The top of the protective housing 2 has a sliding hole adapted to the transmission pressure rod 4, ensuring that the transmission pressure rod 4 can move vertically along the sliding hole without radial offset. The inner wall of the housing also has mounting bosses for fixing the limiting block 5 and the horizontal limiting block 6, while preventing positional displacement of the internal components during movement. The vertical limiting block 7, located at the lowest end of the protective housing 2, is a ring structure with an inner diameter larger than that of the actuating rod 3, facilitating the outward expansion of the actuating rod 3 to change the original aperture size, adapting to terminal heads of different aperture sizes for pin retraction.

[0019] The internal components include a compression spring 201, a middle wedge block 202, a side wedge block assembly 203, a return spring 204, and a pressure plate 205; the actuating rod assembly includes a slanted slide groove 301, a vertical fixing block 302, a return spring sleeve assembly 8, and a pressure head 303. It can be made of high-strength engineering plastic in a single molding process, possessing lightweight and impact-resistant properties.

[0020] The transmission rod 4 penetrates vertically through the interior of the protective housing 2, with its upper part fixedly connected to the pressure plate 205 and its lower part extending to the internal component area. The rod body of the transmission rod 4 is slidably engaged with the sliding hole at the top of the protective housing 2, and can move up and down vertically under the drive of the pressing handle 1, thereby transmitting the external pressing force to the internal components.

[0021] The limiting block 5 is fixed to the upper part of the inner wall of the protective shell 2 to prevent excessive pressing of the pressing handle 1 from causing the transmission pressing rod 4 to squeeze the side wedge block group 203 through the inclined surface, forcing the side wedge block group 203 to move too much laterally, causing damage to the action rod assembly.

[0022] The horizontal limiting block 6 is fixed to the middle of the inner wall of the protective shell 2 and distributed on the outer periphery of the transmission pressure rod 4. The inner side of the horizontal limiting block 6 slides in contact with the rod body of the transmission pressure rod 4, which can limit the horizontal displacement of the transmission pressure rod 4 and ensure that it only moves in the vertical direction, so as to avoid the failure of the linkage of internal components due to the tilt of the transmission pressure rod 4. At the same time, the horizontal limiting block 6 can also limit the horizontal movement range of the internal components, preventing the side wedge block group 203 from moving too laterally and disengaging from the mating area.

[0023] The vertical limiting block 7 is fixed to the bottom of the inner wall of the protective shell 2 and is located on the outside of the actuating rod assembly. The inner side of the vertical limiting block 7 is provided with a limiting groove that is adapted to the vertical fixing block 302. The vertical limiting block 7 can limit the vertical displacement of the actuating rod 3 during operation and also prevent the actuating rod 3 from leaving the interior of the protective shell 2 during operation.

[0024] The internal components, located inside the protective housing 2, are the core components for power conversion, elastic reset, and adjustable clamping. They include a compression spring 201, a middle wedge 202, a side wedge assembly 203, a reset spring 204, and a pressure plate 205. These components work together to complete the action flow of "pressure transmission, wedge linkage, and elastic reset". The compression spring 201 is sleeved on the outside of the transmission pressure rod 4, with its top fixedly connected to the lower surface of the pressure plate 205 and its bottom fixedly connected to the upper surface of the limiting block 5. When the compression spring 201 is in its normal state, it is in a naturally extended state and can apply an upward elastic force to the pressure plate 205, thereby driving the transmission pressure rod 4 and the pressing handle 1 to remain in their initial positions through the pressure plate 205. When the pressing handle 1 drives the transmission pressure rod 4 to move downward, the pressure plate 205 simultaneously compresses the compression spring 201 downward, so that the compression spring 201 stores elastic potential energy. After the pressing handle 1 is released, the compression spring 201 releases its elastic potential energy, pushing the pressure plate 205, the transmission pressure rod 4 and the pressing handle 1 to reset.

[0025] The intermediate wedge 202 is fixedly connected to the lower part of the transmission pressure rod 4 and has an inverted conical block structure with an inclined outer wall. The intermediate wedge 202 moves up and down synchronously with the transmission pressure rod 4. When the transmission pressure rod 4 moves downward, the inclined surface of the intermediate wedge 202 contacts and squeezes the inclined surface of the side wedge group 203, forcing the side wedge group 203 to separate horizontally to both sides. When the transmission pressure rod 4 returns to its original position, the intermediate wedge 202 moves upward, the squeezing force on the side wedge group 203 disappears, and the side wedge group 203 returns to its original position under the action of the return spring 204.

[0026] The side wedge block assembly 203 includes three sets of evenly distributed wedge blocks, located around the middle wedge block 202, and slidingly linked with the inner wall of the protective shell 2. The inner side of each set of wedge blocks is provided with an inclined surface adapted to the inclined surface of the middle wedge block 202. The outer side of the side wedge block assembly 203 is connected to the return spring 204, and the lower part is also provided with a pressure head 303 that cooperates with the actuating rod assembly. The side wedge block assembly 203 moves horizontally under the pressure of the middle wedge block 202, driving the lower pressure head 303 to move horizontally synchronously. When the middle wedge block 202 moves upward, the side wedge block assembly 203 moves towards the middle under the pulling force of the return spring 204, and the lower pressure head 303 also resets synchronously.

[0027] The return springs 204 are divided into upper and lower groups, each group consisting of three return springs 204, which are evenly connected between the outer side of the side wedge group 203 and the inner wall of the protective shell 2. When the return springs 204 are in a normal state, they are in a naturally contracted state and can apply a pushing force to the side wedge group 203 towards the middle. When the side wedge group 203 is separated from the sides by the compression of the middle wedge 202, the return springs 204 are continuously pressed and store elastic potential energy. When the middle wedge 202 moves upward, the return springs 204 release elastic potential energy and push the side wedge group 203 back to the middle, ensuring that the side wedge group 203 achieves a repeated contraction process.

[0028] The pressure plate 205 is a circular metal sheet structure, which is fixedly sleeved on the upper part of the transmission pressure rod 4. The upper surface of the pressure plate 205 is fixed to the bottom of the pressing handle 1. Its outer diameter is larger than the rod diameter of the transmission pressure rod 4 and smaller than the inner diameter of the protective shell 2. The main function of the pressure plate 205 is to transmit pressure and elasticity. On the one hand, it transmits the downward pressing force of the transmission pressure rod 4 to the middle wedge 202, and on the other hand, it transmits the upward elasticity of the compression spring 201 to the pressing handle, so as to ensure that the power is stably transmitted between the pressing handle 1, the transmission pressure rod 4, the middle wedge 202 and the compression spring 201.

[0029] The actuating rod assembly is an actuator that acts directly on the wire harness terminal. Its main feature is adjustability. Its actuating rod 3 includes a slanted slide 301, a vertical fixing block 302, a return spring sleeve assembly 8, and a pressure head 303.

[0030] The vertical fixing block 302 is fixed to the middle of the actuating rod 3 and has a fan-shaped structure. It slides in conjunction with the limiting groove of the vertical limiting block 7. The main function of the vertical fixing block 302 is to enhance the vertical stability of the actuating rod 3 and prevent the actuating rod 3 from tilting during vertical movement. At the same time, the upper and lower surfaces of the vertical fixing block 302 can also cooperate with the return spring sleeve assembly 8 to provide an installation reference and limit for the return spring sleeve assembly 8, ensuring that the elastic force of the return spring sleeve assembly 8 can stably act on the actuating rod 3.

[0031] The reset spring sleeve assembly 8 is located between the actuating rod 3 and the protective housing 2. When the reset spring sleeve assembly 8 is in its normal state, the inner spring is in a naturally extended state, which can push the pressure head 303 to remain in the initial position. When the actuating rod 3 moves outward and drives the pressure head 303 to move outward, the actuating rod 3 will compress the reset spring sleeve assembly 8, and the reset spring sleeve assembly 8 will store elastic potential energy. After the needle is withdrawn, the reset spring sleeve assembly 8 releases the elastic potential energy, the actuating rod 3 retracts, and the pressure head 303 resets.

[0032] The pressure head 303 is located at the bottom of the actuating rod 3. Its shape and size can be adapted and adjusted according to the model and size of the wire harness terminal. The bottom of the pressure head 303 is provided with a smooth contact surface, which can reduce friction with the terminal, avoid scratching the terminal surface during the pin retraction process, and ensure that the terminal can still be used normally after the pin is retracted.

[0033] The working process of this utility model includes an initial state, a pressing and driving process, a needle retraction stage, and a reset stage, as detailed below: Initial state: The compression spring 201 extends naturally, driving the transmission pressure rod 4 and the pressing handle 1 to the upper position through the pressure plate 205; the return spring 204 contracts naturally, pushing the side wedge block group 203 to move closer to the middle, while fixing the action rod 3; the spring in the return spring sleeve group 8 extends naturally, and the pressure head 303 is also in the position of minimum diameter.

[0034] Pressing drive process: The operator presses down the pressing handle 1, which drives the transmission pressing rod 4 and the pressing plate 205 to move downward synchronously. The pressing plate 205 compresses the compression spring 201, and the compression spring 201 stores elastic potential energy. At the same time, the transmission pressing rod 4 drives the middle wedge block 202 to move downward. The inclined surface of the middle wedge block 202 presses against the inclined surface of the side wedge block group 203, forcing the side wedge block group 203 to separate outward. At the same time, the return spring 204 is also compressed and stores elastic potential energy. The pressing head 303 expands outward under the action of external force, changing the original hole size to adapt to the terminal head of different hole size models for pin retraction.

[0035] Pin retraction stage: Align the pressure head 303 with the wire harness terminal, and press the pressure handle 1 downward according to the shape and size of the pin retraction terminal. The transmission pressure rod 4 drives the action rod 3 to move downward synchronously with the pressure head 303. The pressure head 303 contacts the terminal and applies a downward pushing force to push the terminal out of the connector. During this process, the pressure head 303 compresses the return spring sleeve assembly 8 outward, and the return spring sleeve assembly 8 stores elastic potential energy. Until the terminal is removed from the connector, the pressing force should be kept uniform to avoid excessive force that may cause the terminal to deform.

[0036] Reset phase: After the needle retraction is completed, release the pressing handle 1. The pressure spring 201 pushes the transmission pressure rod 4, the action rod 3 and the pressure head 303 to reset upwards; the reset spring sleeve group 8 pushes the action rod 3 to reset, and at the same time, the pressure head 303 resets. The equipment returns to its initial state and can be used for the next needle retraction operation.

Claims

1. An adjustable terminal pin ejector, characterized in that, The assembly includes a housing assembly, an internal assembly, and an actuating rod assembly. The housing assembly includes a pressing handle (1), a protective housing (2), a transmission rod (4), a limiting block (5), an actuating rod (3), a horizontal limiting block (6), and a vertical limiting block (7). The bottom of the pressing handle (1) is fixedly connected to the top of the transmission rod (4). The protective housing (2) is cylindrical with a hollow internal structure, used to accommodate the upper structure of the transmission rod (4), the internal assembly, and the actuating rod assembly. The top of the protective housing (2) has a sliding hole adapted to the transmission rod (4). The upper and middle parts of the inner wall of the protective housing (2) are respectively provided with mounting bosses for fixing the limiting block (5) and the horizontal limiting block (6). The vertical limiting block (7) is located at the bottom of the protective housing (2). The internal assembly... The assembly includes a pressure plate (205), a pressure spring (201), a middle wedge (202), a side wedge assembly (203), and a return spring (204). The lower surface of the pressure plate (205) is fixedly connected to the starting end of the pressure spring (201). The pressure spring (201) is sleeved on the upper part of the transmission pressure rod (4). The tail end of the pressure spring (201) is fixedly connected to the upper surface of the limiting extrusion block (5). The middle wedge (202) is fixedly connected to the lower part of the transmission pressure rod (4) and has an inverted conical block structure. The inclined surface of the middle wedge (202) contacts and presses the inclined surface of the side wedge assembly (203). The return spring (204) is connected between the outer side of the side wedge assembly (203) and the inner wall of the protective shell (2). The side wedge assembly (203) forms the action rod assembly.

2. The adjustable terminal pin ejector according to claim 1, characterized in that, The vertical limiting block (7) is a circular ring structure, and the diameter of its inner ring is larger than the diameter of the actuating rod (3).

3. The adjustable terminal pin ejector according to claim 1, characterized in that, The actuating rod assembly includes a slanted slide (301), a vertical fixing block (302), a reset spring sleeve assembly (8), and a pressure head (303). The actuating rod assembly is arc-shaped, with the pressure head (303) located at the lowest end. The vertical fixing block (302) is a fan-shaped structure located in the middle of the actuating rod assembly. The reset spring sleeve assembly (8) is used to sleeve the reset spring (204).

4. The adjustable terminal pin ejector according to claim 1, characterized in that, The reset spring (204) is divided into two groups, upper and lower, each group consisting of three reset springs (204), which are evenly connected between the outer side of the side wedge block group (203) and the inner wall of the protective shell (2).

5. The adjustable terminal pin ejector according to claim 3, characterized in that, The actuating rod assembly comprises three rods, which are combined to form a cylindrical shape.

6. The adjustable terminal pin ejector according to claim 1, characterized in that, The outer diameter of the operating surface of the pressing handle (1) is larger than the top opening of the protective shell (2).

7. The adjustable terminal pin ejector according to claim 3, characterized in that, The bottom of the pressure head (303) is provided with a smooth contact surface.

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