Welding tool for movable contact unit of vehicle-mounted relay

Abstract

The utility model relates to the technical field of vehicle-mounted relay processing, 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 the surface of the base is provided with an installation groove matched with the bottom face of the movable contact unit in shape. 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] This utility model relates to the field of vehicle relay processing technology, and in particular to welding fixtures for vehicle relay moving contact units. Background Technology

[0002] Onboard relays are crucial components in train control systems used to control emergency braking. To better adapt to modern railway construction and industry advancements, onboard relays are required to be adjustment-free, thus placing higher demands on the quality of all relay components. A key aspect is the high degree of dimensional consistency among all components. The moving contact unit is a vital component of the onboard relay, belonging to the actuator mechanism. Its dimensional and welding quality requirements are extremely stringent. Even slight deviations in component tolerances directly affect the subsequent assembly and injection molding processes, ultimately impacting the overall characteristics of the relay.

[0003] Currently, the market demand for automotive relays is high, and companies are engaged in mass production. However, existing tooling is all general-purpose tooling. The processing of moving contact units requires welding moving contact components and moving contact tail pieces. The process of fixing parts during the welding of moving contact units using general-purpose tooling is cumbersome, resulting in high labor intensity for operators during mass production and failing to meet production efficiency requirements. At the same time, existing general-purpose tooling can only serve as a support and basic limit for moving contact units, and dimensional errors often occur during the fixing and welding processes, failing to meet product quality requirements. Utility Model Content

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, this utility model provides a welding fixture for vehicle relay moving contact units. By setting a base to accurately fit the shape of the moving contact unit, and setting a clamping structure and a slider structure to limit the two ends of the moving contact unit, it ensures that no relative movement occurs during the spot welding process, and the moving contact unit meets the product quality requirements after welding.

[0005] To achieve the above objectives, the main technical solutions adopted by this utility model include:

[0006] A welding fixture for a vehicle-mounted relay moving contact unit, wherein the moving contact unit consists of a moving contact assembly and a moving 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 moving contact unit. One end of the base that matches the moving contact assembly is a component fixing part. The component fixing part is provided with a clamping structure, which is used to clamp the moving contact assembly and the moving contact tail piece at the welding point of the moving contact unit. One end of the base that matches the moving contact tail piece is a tail piece fixing part. The tail piece fixing part is provided with a slider structure, which is used to limit the longitudinal displacement of the moving contact tail piece.

[0007] By setting the base to accurately fit the shape of the moving contact unit, and by setting the clamping structure and the slider structure to limit the two ends of the moving contact unit, it is ensured that no relative movement occurs during the spot welding process, and the moving contact unit meets the product quality requirements after welding.

[0008] Furthermore, the clamping structure includes a pressure block, a bearing screw, and a spring. The bottom of the component fixing part of the base away from the moving contact component is provided with a spring limiting hole that is narrow at the top and wide at the bottom. The pressure block is located above the component fixing part, and the bottom surface of the pressure block is in contact with the moving contact component. The bearing screw is fitted with a spring and passes through the spring limiting hole from below the base to connect with the pressure block.

[0009] By designing a specific clamping structure, the moving contact assembly can be fixed by pressing the bearing screw, rotating it above the moving contact assembly, and then releasing it. This can be done with one hand, simplifying the fixing operation and thus improving production efficiency.

[0010] Furthermore, the contact surface between the bottom surface of the pressure block and the moving contact assembly includes a pressing surface and a limiting surface. The pressing surface is located above the overlapping area of ​​the moving contact assembly and the moving contact tail piece, and the limiting surface is located above the tail of the moving contact assembly away from the welding point.

[0011] By designing pressing and limiting surfaces, pressure on one end during welding is avoided, which could cause the other end to lift up, thus deforming or scratching the part. Limiting from both ends keeps the part horizontal at all times, ensuring the stability of the moving contact unit during welding and thus improving product quality.

[0012] Furthermore, the component fixing part of the base is provided with a positioning pin, which matches the keyway hole of the moving contact component. The moving contact component is precisely positioned by setting the positioning pin.

[0013] Furthermore, the slider structure includes a movable slider and a limiting block. The tail plate limiting part of the base is provided with a sliding hole. The limiting block is slidably placed in the sliding hole along the length direction of the movable contact tail plate. The movable slider is located above the tail plate fixing part and is connected to the limiting block. When the limiting block is moved to a position close to one end of the movable contact tail plate, the bottom surface of the movable slider contacts the movable contact tail plate.

[0014] By designing a specific slider structure, the moving contact tail piece can be longitudinally limited by pushing the limit block, which can be carried out with one hand, simplifying the fixing operation and thus improving production and processing efficiency.

[0015] Furthermore, a baffle is provided at one end of the movable slider near the moving contact tail piece.

[0016] The moving contact unit is small in size, and the operator's hand is close to the weld point during welding, making it easy to be injured by the generated spatter. By setting up a baffle, spatter injuries can be avoided.

[0017] Furthermore, the top surface of the limiting block is provided with a slider boss, which is narrower than the bottom of the limiting block.

[0018] Furthermore, the slider boss is 1-2mm higher than the base.

[0019] The height of the slider boss is slightly higher than that of the base, which ensures the limiting effect while allowing the movable slider to slide smoothly on the base.

[0020] The beneficial effects of this utility model are:

[0021] This utility model provides a welding fixture for the moving contact unit of a vehicle-mounted relay. By setting a base to accurately fit the shape of the moving contact unit, and by setting a clamping structure and a slider structure to limit the two ends of the moving contact unit, it tightly compacts the unit during the welding process, ensuring that no relative movement occurs during spot welding. This avoids welding errors caused by inaccurate welding fixation, and the welded moving contact unit meets the product quality requirements, thus improving product quality.

[0022] The clamping structure allows the moving contact assembly to be fixed by simply rotating the bearing screw above it and releasing it; this can be done with one hand. The slider structure allows the moving contact tail piece to be longitudinally limited by pushing the limit block; this can also be done with one hand. The combination of these two mechanisms enables quick and easy fixing of the moving contact unit using both hands, simplifying the fixing process and improving production efficiency.

[0023] It is also equipped with baffles to prevent welding spatter injuries and ensure the personal safety of operators. Attached Figure Description

[0024] Figure 1 This is an assembly diagram of the welding fixture for the moving contact unit of the vehicle relay of this utility model;

[0025] Figure 2 This is a schematic diagram of the moving contact unit structure;

[0026] Figure 3 This is an exploded view of the welding fixture for the moving contact unit of the vehicle-mounted relay of this utility model;

[0027] Figure 4 This is a schematic diagram of the top structure of the welding fixture for the moving contact unit of the vehicle relay of this utility model;

[0028] Figure 5 This is a schematic diagram of the bottom structure of the welding fixture for the moving contact unit of the vehicle relay of this utility model.

[0029] 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 Implementation

[0030] To better explain and facilitate understanding of this invention, the present invention will be described in detail below with reference to the accompanying drawings and 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 to 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.

[0031] like Figures 1-5 As shown, a welding fixture for a vehicle-mounted relay moving contact unit is provided. The moving contact unit consists of a moving contact assembly 8 and a moving contact tail piece 9. It includes 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. 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. 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.

[0032] By setting the base 1 to accurately fit the shape of the moving contact unit, and by setting the clamping structure and the slider structure to limit the two ends of the moving contact unit, it is ensured that no relative movement occurs during the spot welding process, and the moving contact unit meets the product quality requirements after welding.

[0033] Specifically, the clamping structure includes a pressure block 2, a bearing screw 3, and a spring 4. The bottom of the component fixing part 11 of the base 1, away from the moving contact component 8, 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 located above the component fixing part 11, and the bottom surface of the pressure block 2 is in contact with the moving contact component 8. The bearing screw 3 is fitted with the spring 4, and the bearing screw 3 passes through the spring 4 limiting hole 111 from below the base 1 and is connected to the pressure block 2.

[0034] By designing a specific clamping structure, the moving contact assembly 8 can be fixed by pressing the bearing screw 3 and rotating it above the moving contact assembly 8 and then releasing it. This can be done with one hand, simplifying the fixing operation and thus improving production efficiency.

[0035] Specifically, the contact surface between the bottom surface of the pressure block 2 and the moving contact assembly 8 includes a pressing surface 22 and a limiting surface 21. 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.

[0036] By designing the pressing surface 22 and the limiting surface 21, pressure is applied to one end during the welding process, which would cause the other end to lift up, thereby deforming or scratching the part. The limiting from both ends keeps the part horizontal at all times, ensuring the stability of the moving contact unit during the welding process, thus improving product quality.

[0037] Specifically, the component fixing part 11 of the base 1 is provided with a positioning pin 112, which matches the key-shaped hole of the moving contact component 8. The moving contact component 8 is precisely positioned by setting the positioning pin 112.

[0038] Specifically, the slider structure includes a movable slider 7 and a limiting block 5. The tail plate limiting portion of the base 1 is provided with a sliding hole. The limiting block 5 is slidably placed in the sliding hole along the length direction of the movable contact tail plate 9. The movable slider 7 is located above the tail plate fixing portion 12 and is connected to the limiting block 5. When the limiting block 5 moves to a position close to one end of the movable contact tail plate 9, the bottom surface of the movable slider 7 contacts the movable contact tail plate 9. The length of the sliding hole determines the stroke of the movable slider 7.

[0039] By designing a specific slider structure, the moving contact tail piece 9 can be longitudinally limited by pushing the limiting block 5, which can be carried out with one hand, simplifying the fixing operation and thus improving production and processing efficiency.

[0040] Specifically, a baffle 71 is provided at one end of the movable slider 7 near the moving contact tail piece 9.

[0041] The moving contact unit is small in size, and the operator's hand is close to the weld point during welding, making it easy to be injured by the generated spatter. The baffle 71 is set to avoid spatter injury.

[0042] Specifically, the top surface of the limiting block 5 is provided with a slider boss 6, which is narrower than the bottom of the limiting block 5.

[0043] Specifically, the slider boss 6 is 11-2mm higher than the base.

[0044] The height of the slider boss 6 is slightly higher than that of the base 1, which ensures the limiting effect while allowing the movable slider 7 to slide smoothly on the base 1.

[0045] The welding process for the moving contact unit of the vehicle relay is as follows.

[0046] 1. Holding the component fixing part 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 groove of the component fixing part 11 of the base 1. Place the moving contact component 8 and the moving contact tail piece 9 into the mounting groove of the base 1 according to the welding standard. The key hole of the moving contact component 8 engages with the positioning pin 112. After confirming the position of the moving contact component 8 in the base 1, lift the bearing screw 3 again with your index finger, causing the pressure block 2 to rotate above the moving contact component 8. Then release your finger, and the pressure block 2 will press against the moving contact component 8. At this time, the pressing surface 22 presses against the overlapping part of the moving contact component 8 and the moving contact tail piece 9, and the limiting surface 21 presses against the tail of the moving contact component 8. At this time, the welding ends of the moving contact component 8 and the moving contact tail piece 9 are fixed in the tooling.

[0047] 2. Hold the tail piece fixing part 12 of the base 1 with your right hand, push the movable slider 7 with your thumb, and move the movable slider 7 to the top of the moving contact tail piece 9. The position of the moving contact tail piece 9 is fixed. At this time, the relative position of the components in the moving contact unit meets the requirements of the drawing.

[0048] 3. Start welding. After welding is completed, move slider 7 to the other end, lift bearing screw 3 and rotate it. The pressure block 2 deviates from the moving contact assembly 8 and the welded part is removed.

[0049] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A welding fixture for a vehicle-mounted relay moving contact unit, wherein the moving contact unit comprises a moving contact assembly (8) and a moving contact tail piece (9), characterized in that, The device includes a base (1), a clamping structure, and a slider structure. The surface of the base (1) is provided with an installation 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). 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). 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).

2. The welding fixture for the moving contact unit of the vehicle-mounted relay as described in claim 1, characterized in that: The clamping structure includes a pressure block (2), a bearing screw (3) and a spring (4). The bottom of the component fixing part (11) of the base (1) away from the moving contact component (8) 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 located above the component fixing part (11), and the bottom surface of the pressure block (2) is in contact with the moving contact component (8). The bearing screw (3) is fitted with the spring (4), and the bearing screw (3) passes through the spring (4) limiting hole (111) from below the base (1) and is connected to the pressure block (2).

3. The welding fixture for the moving contact unit of the vehicle relay as described in claim 2, characterized in that: The contact surface between the bottom surface of the pressure block (2) and the moving contact assembly (8) includes a pressing surface (22) and a limiting surface (21). 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 fixture for the moving contact unit of the vehicle-mounted relay as described in claim 1, characterized in that: The component fixing part (11) of the base (1) is provided with a positioning pin (112), which matches the key hole of the moving contact component (8).

5. The welding fixture for the moving contact unit of the vehicle-mounted relay as described in claim 1, characterized in that: The slider structure includes a movable slider (7) and a limiting block (5). The tail plate limiting part of the base (1) is provided with a sliding hole. The limiting block (5) slides along the length direction of the moving contact tail plate (9) and is placed in the sliding hole. The movable slider (7) is located above the tail plate fixing part (12) and is connected to the limiting block (5). When the limiting block (5) moves to a position close to the moving contact tail plate (9), the bottom surface of the movable slider (7) contacts the moving contact tail plate (9).

6. The welding fixture for the moving contact unit of the vehicle relay as described in claim 5, characterized in that: The movable slider (7) has a baffle (71) at one end near the moving contact tail piece (9).

7. The welding fixture for the moving contact unit of the vehicle relay as described in claim 5, characterized in that: The top surface of the limiting block (5) is provided with a slider boss (6), which is narrower than the bottom of the limiting block (5).

8. The welding fixture for the moving contact unit of the vehicle relay as described in claim 7, characterized in that: The slider boss (6) is 1~2mm higher than the base (1).

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