Welding tool for movable contact unit of vehicle-mounted relay

Abstract

The invention relates to the technical field of vehicle-mounted relay machining, in particular to a vehicle-mounted relay movable contact unit welding tool, a movable contact unit is composed of a movable contact assembly and a movable contact tail piece and comprises a base, a pressing structure and a sliding block structure, and a mounting groove matched with the bottom face of the movable contact unit in shape is formed in the surface of the base. One end, matched with the movable contact assembly, of the base is an assembly fixing part, the assembly fixing part is provided with a pressing structure, the pressing structure is used for pressing the movable contact assembly and the movable contact tail piece at the welding point of the movable contact unit, one end, matched with the movable contact tail piece, of the base is a tail piece fixing part, and the tail piece fixing part is provided with a sliding block structure; the sliding block structure is used for limiting the longitudinal displacement of the movable contact tail piece. The base is accurately matched with the shape of the movable contact unit, the pressing structure and the sliding block structure are arranged to limit the two ends of the movable contact unit, it is guaranteed that relative movement does not occur in the spot welding process, and the welded movable contact unit meets the product quality requirement.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle-mounted relay processing, in particular to a welding tool for a moving contact unit of a vehicle-mounted relay. Background Art

[0002] Onboard relays are crucial components in train control systems for controlling emergency braking. To better adapt to modern railway construction and industry advancements, onboard relays must be adjustment-free. This places higher demands on the quality of relay components, with a key requirement being high dimensional consistency. The moving contact unit, a crucial component of onboard relays and the actuator, demands extremely stringent dimensional and welding quality requirements. Even the slightest deviation from tolerance can directly impact the processing and production of subsequent assembly and injection molding processes, ultimately affecting the overall performance of the relay.

[0003] The current market demand for automotive relays is high, prompting companies to manufacture them in large quantities. However, existing tooling is generally general-purpose. The machining of the moving contact unit requires welding the moving contact assembly and the moving contact tail. This cumbersome process of securing the moving contact unit with general-purpose tooling results in high operator labor intensity during mass production and fails to meet production efficiency targets. Furthermore, existing general-purpose tooling only provides support and basic positioning for the moving contact unit, often leading to dimensional errors during the securing and welding processes, failing to meet product quality requirements. Summary of the Invention

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a welding tool for the moving contact unit of an on-board relay. By setting a base, the shape of the moving contact unit is accurately adapted, and a clamping structure and a slider structure are set to limit the two ends of the moving contact unit to ensure that no relative movement occurs during the spot welding process. After welding, the moving contact unit meets the product quality requirements.

[0005] In order to achieve the above objectives, the main technical solutions adopted by the present invention include: The welding tooling of the movable contact unit of the vehicle-mounted relay consists of a movable contact assembly and a movable contact tail piece, including a base, a clamping structure and a slider structure. The surface of the base is provided with a mounting groove that matches the shape of the bottom surface of the movable contact unit. One end of the base that matches the movable contact assembly is a component fixing part. The component fixing part is provided with a clamping structure. The clamping structure is used to clamp the movable contact assembly and the movable contact tail piece at the welding point of the movable contact unit. One end of the base that matches the movable contact tail piece is a tail piece fixing part. The tail piece fixing part is provided with a slider structure. The slider structure is used to limit the longitudinal displacement of the movable contact tail piece.

[0006] By setting the base, the shape of the moving contact unit is accurately adapted, and by setting the clamping structure and the slider structure, the two ends of the moving contact unit are limited to ensure that no relative movement occurs during the spot welding process. After welding, the moving contact unit meets the product quality requirements.

[0007] Furthermore, the clamping structure includes a pressure block, a bearing screw and a spring. The component fixing part of the base is away from the bottom of the moving contact assembly and is provided with a spring limiting hole that is narrow at the top and wide at the bottom. The pressure block is arranged above the component fixing part, and the bottom surface of the pressure block is in contact with the moving contact assembly. The bearing screw sleeve is provided with a spring, and the bearing screw passes through the spring limiting hole from the bottom of the base and is connected to the pressure block.

[0008] By designing a specific clamping structure, the moving contact assembly can be fixed by pressing the bearing screw, rotating it to the top of the moving contact assembly and releasing it. This can be done with one hand, simplifying the fixing operation and thus improving production and processing efficiency.

[0009] Furthermore, the contact surface between the bottom surface of the pressure block and the movable contact assembly includes a pressing surface and a limiting surface. The pressing surface is located above the overlapping part of the movable contact assembly and the movable contact tail piece, and the limiting surface is located above the tail of the movable contact assembly away from the welding point.

[0010] By designing the clamping surface and the limiting surface, we can avoid applying pressure to one end during welding, which would cause the other end to tilt, thereby deforming or scratching the parts. By limiting the parts at both ends, we can always keep the parts level, ensuring the stability of the moving contact unit during the welding process, thereby improving product quality.

[0011] Furthermore, the assembly fixing portion of the base is provided with a positioning pin, and the positioning pin matches the key-shaped hole of the movable contact assembly. The movable contact assembly is precisely positioned by providing the positioning pin.

[0012] Furthermore, the slider structure includes a movable slider and a limit block. The tail piece limit portion of the base is provided with a sliding hole. The limit block is slid into the sliding hole along the length direction of the moving contact tail piece. The movable slider is located above the tail piece fixing portion and is connected to the limit block. When the limit block is displaced to one end close to the moving contact tail piece, the bottom surface of the movable slider contacts the moving contact tail piece.

[0013] By designing a specific slider structure, the movable contact tail piece can be longitudinally limited by pushing the limit block, which can be implemented with one hand, simplifying the fixing operation and thus improving production and processing efficiency.

[0014] Furthermore, a baffle is provided at one end of the movable slider close to the movable contact tail piece.

[0015] The moving contact unit is small in size, and the operator's hands are close to the welding point during welding, which can easily cause injuries to the hands due to the generated spatter. The baffle is set to avoid injuries due to spatter.

[0016] Furthermore, a slider boss is provided on the top surface of the limit block, and the slider boss is narrower than the bottom surface of the limit block.

[0017] Furthermore, the slider boss is 1-2 mm higher than the base.

[0018] The height of the slider boss is slightly higher than the base, which ensures the limiting effect while allowing the movable slider to slide smoothly on the base.

[0019] The beneficial effects of the present invention are: The welding tool for the moving contact unit of the vehicle-mounted relay of the present invention accurately adapts to the shape of the moving contact unit by providing a base, limits the two ends of the moving contact unit by providing a clamping structure and a slider structure, and tightly compacts the contact during the welding process to ensure that no relative movement occurs during the spot welding process, thereby avoiding welding errors caused by inaccurate welding fixation. After welding, the moving contact unit meets product quality requirements, thereby improving product quality.

[0020] The clamping mechanism secures the moving contact assembly by rotating the bearing screw above it and releasing it, easily accomplished with one hand. The slider mechanism also limits the longitudinal position of the moving contact tail piece by pushing the limit block, also easily accomplished with one hand. The combination of these two mechanisms allows for quick, two-handed securing of the moving contact unit, simplifying the securing operation and improving production efficiency.

[0021] At the same time, a baffle is provided to block the damage caused by welding spatter and ensure the personal safety of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the assembly of the welding tool for the vehicle-mounted relay moving contact unit of the present invention; Figure 2 Schematic diagram of the structure of the moving contact unit; Figure 3 An exploded view of the welding tooling for the vehicle-mounted relay moving contact unit of the present invention; Figure 4 This is a schematic diagram of the top structure of the welding tool for the vehicle-mounted relay moving contact unit of the present invention; Figure 5 The figure is a schematic diagram of the bottom structure of the welding tool for the vehicle-mounted relay moving contact unit of the present invention.

[0023] In the figure: 1. Base; 11. Component fixing part; 111. Spring limiting hole; 112. Positioning pin; 12. Tail piece fixing part; 2. Pressure block; 21. Limiting surface; 22. Pressing surface; 3. Bearing screw; 4. Spring; 5. Limiting block; 6. Slider boss; 7. Moving slider; 71. Baffle; 8. Moving contact assembly; 9. Moving contact tail piece. DETAILED DESCRIPTION

[0024] To better explain the present invention and facilitate understanding, the present invention is described in detail below with reference to the accompanying drawings and through specific embodiments. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0025] like Figure 1-Figure 5 As shown, the welding tooling of the moving contact unit of the vehicle-mounted relay, the moving contact unit is composed of a moving contact assembly 8 and a moving contact tail piece 9, including a base 1, a clamping structure and a slider structure. The surface of the base 1 is provided with a mounting groove that matches the shape of the bottom surface of the moving contact unit. One end of the base 1 that matches the moving contact assembly 8 is a component fixing part 11, and the component fixing part 11 is provided with a clamping structure. The clamping structure is used to clamp the moving contact assembly 8 and the moving contact tail piece 9 at the welding point of the moving contact unit. One end of the base 1 that matches the moving contact tail piece 9 is a tail piece fixing part 12, and the tail piece fixing part 12 is provided with a slider structure. The slider structure is used to limit the longitudinal displacement of the moving contact tail piece 9.

[0026] By setting the base 1, the shape of the moving contact unit is accurately adapted, and by setting the clamping structure and the slider structure, the two ends of the moving contact unit are limited to ensure that no relative movement occurs during the spot welding process. After welding, the moving contact unit meets the product quality requirements.

[0027] Specifically, the clamping structure includes a pressure block 2, a bearing screw 3 and a spring 4. The component fixing portion 11 of the base 1 is away from the bottom of the moving contact assembly 8 and is provided with a spring 4 limiting hole 111 that is narrow at the top and wide at the bottom. The pressure block 2 is arranged above the component fixing portion 11, and the bottom surface of the pressure block 2 is in contact with the moving contact assembly 8. The bearing screw 3 is sleeved with a spring 4, and the bearing screw 3 passes through the spring 4 limiting hole 111 from the bottom of the base 1 and is connected to the pressure block 2.

[0028] By designing a specific clamping structure, the moving contact assembly 8 can be fixed by pressing the bearing screw 3 and rotating it to the top of the moving contact assembly 8 and then releasing it. This can be done with one hand, which simplifies the fixing operation and thus improves production and processing efficiency.

[0029] Specifically, the contact surface between the bottom surface of the pressure block 2 and the moving contact assembly 8 includes a clamping surface 22 and a limiting surface 21. The clamping surface 22 is located above the overlapping point of the moving contact assembly 8 and the moving contact tail piece 9, and the limiting surface 21 is located above the tail of the moving contact assembly 8 away from the welding point.

[0030] By designing the clamping surface 22 and the limiting surface 21, it is avoided that pressure applied to one end during welding causes the other end to tilt, thereby deforming or scratching the parts. The parts are limited at both ends to always remain level, ensuring the stability of the moving contact unit during the welding process, thereby improving product quality.

[0031] Specifically, the assembly fixing portion 11 of the base 1 is provided with a positioning pin 112, and the positioning pin 112 matches the key-shaped hole of the movable contact assembly 8. The movable contact assembly 8 is precisely positioned by providing the positioning pin 112.

[0032] Specifically, the slider structure includes a movable slider 7 and a stopper 5. The tail piece stopper portion of the base 1 is provided with a sliding hole. The stopper 5 slides into the sliding hole along the length of the movable contact tail piece 9. The movable slider 7 is located above the tail piece fixing portion 12 and is connected to the stopper 5. When the stopper 5 moves to a position close to one end of the movable contact tail piece 9, the bottom surface of the movable slider 7 contacts the movable contact tail piece 9. The length of the sliding hole determines the travel of the movable slider 7.

[0033] By designing a specific slider structure, the movable contact tail piece 9 can be longitudinally limited by pushing the limit block 5, which can be implemented with one hand, simplifying the fixing operation and thus improving production and processing efficiency.

[0034] Specifically, a baffle 71 is provided at one end of the movable slider 7 close to the movable contact tail piece 9 .

[0035] The size of the moving contact unit is small, and the operator's hands are close to the welding point during welding, and the hands are easily injured by the spatter generated. The baffle 71 is provided to avoid injuries caused by spatter.

[0036] Specifically, a slider boss 6 is provided on the top surface of the limiting block 5 , and the slider boss 6 is narrower than the bottom surface of the limiting block 5 .

[0037] Specifically, the slider boss 6 is 11-2 mm higher than the base.

[0038] The height of the slider boss 6 is slightly higher than the base 1 , which ensures the limiting effect while allowing the movable slider 7 to slide smoothly on the base 1 .

[0039] The implementation process of the welding tooling for the moving contact unit of the vehicle-mounted relay is as follows.

[0040] 1. Hold the assembly fixing portion 11 of the base 1 with your left hand. Use your index finger to lift the bearing screw 3 and rotate it, causing the pressure block 2 to deviate from the mounting slot of the assembly fixing portion 11 of the base 1. Place the movable contact assembly 8 and the movable contact tail piece 9 in the mounting slot of the base 1 according to welding standards. The key-shaped hole of the movable contact assembly 8 mates with the locating pin 112. After determining the position of the movable contact assembly 8 within the base 1, use your index finger to lift the bearing screw 3 again, rotate the pressure block 2 above the movable contact assembly 8, and then release your finger. The pressure block 2 is now pressed against the movable contact assembly 8. At this time, the pressing surface 22 is pressed against the overlapping portion of the movable contact assembly 8 and the movable contact tail piece 9, and the limiting surface 21 is pressed against the tail of the movable contact assembly 8. At this point, the welded ends of the movable contact assembly 8 and the movable contact tail piece 9 are fixed in the tooling.

[0041] 2. Hold the tail piece fixing part 12 of the base 1 with your right hand, and push the movable slider 7 with your thumb. Move the movable slider 7 to above the movable contact tail piece 9. The position of the movable contact tail piece 9 is fixed. At this time, the relative positions of the components in the movable contact unit meet the requirements of the drawing.

[0042] 3. Start welding. After welding is completed, move the slider 7 to the other end, lift the bearing screw 3 and rotate it, so that the pressure block 2 deviates from the moving contact assembly 8, and remove the welded parts.

[0043] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may alter, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A welding tool for a moving contact unit of an on-vehicle relay, the moving contact unit comprising a moving contact assembly (8) and a moving contact tail piece (9), characterized in that: The invention comprises a base (1), a clamping structure and a slider structure, wherein a mounting groove matching the shape of the bottom surface of a moving contact unit is provided on the surface of the base (1), one end of the base (1) matching the moving contact assembly (8) is a component fixing portion (11), the component fixing portion (11) is provided with a clamping structure, the clamping structure is used to clamp the moving contact assembly (8) and the moving contact tail piece (9) at the welding point of the moving contact unit, one end of the base (1) matching the moving contact tail piece (9) is a tail piece fixing portion (12), the tail piece fixing portion (12) is provided with a slider structure, and the slider structure is used to limit the longitudinal displacement of the moving contact tail piece (9).

2. The welding tool for the moving contact unit of the vehicle-mounted relay according to claim 1, characterized in that: The clamping structure comprises a pressing block (2), a bearing screw (3) and a spring (4); a spring (4) limiting hole (111) which is narrow at the top and wide at the bottom is provided at the bottom of the component fixing portion (11) of the base (1) away from the moving contact component (8); the pressing block (2) is arranged above the component fixing portion (11); the bottom surface of the pressing block (2) is in contact with the moving contact component (8); the bearing screw (3) is sleeved with the spring (4); the bearing screw (3) passes through the spring (4) limiting hole (111) from the bottom of the base (1) and is connected to the pressing block (2).

3. The welding tool for the moving contact unit of the vehicle-mounted relay according to claim 2, characterized in that: The contact surface between the bottom surface of the pressing block (2) and the moving contact assembly (8) comprises a pressing surface (22) and a limiting surface (21), wherein the pressing surface (22) is located above the overlap between the moving contact assembly (8) and the moving contact tail piece (9), and the limiting surface (21) is located above the tail of the moving contact assembly (8) away from the welding point.

4. The welding tool for the moving contact unit of the vehicle-mounted relay according to claim 1, characterized in that: The component fixing portion (11) of the base (1) is provided with a positioning pin (112), and the positioning pin (112) matches the key-shaped hole of the movable contact component (8).

5. The welding tool for the moving contact unit of the vehicle-mounted relay according to claim 1, characterized in that: The slider structure comprises a movable slider (7) and a limit block (5); a tail piece limit portion of the base (1) is provided with a sliding hole; the limit block (5) is slidably placed in the sliding hole along the length direction of the movable contact tail piece (9); the movable slider (7) is located above the tail piece fixing portion (12) and is connected to the limit block (5); when the limit block (5) is displaced to be close to one end of the movable contact tail piece (9), the bottom surface of the movable slider (7) contacts the movable contact tail piece (9).

6. The welding tool for the moving contact unit of the vehicle-mounted relay according to claim 5, characterized in that: A baffle (71) is provided at one end of the movable slider (7) close to the movable contact tail piece (9).

7. The welding tool for the moving contact unit of the vehicle-mounted relay according to claim 5, characterized in that: The top surface of the limit block (5) is provided with a slider boss (6), and the slider boss (6) is narrower than the bottom of the limit block (5).

8. The welding tool for the moving contact unit of the vehicle-mounted relay according to claim 7, characterized in that: The slider boss (6) is 1-2 mm higher than the base (1).

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