End position fixing mechanism for automobile brake pipe welding and welding system thereof

Abstract

The application relates to the technical field of brake pipe steel throat machining, in particular to an end position limiting and fixing mechanism for automobile brake pipe welding and a welding system thereof, which solves the problem that the end position of the steel throat is blocked during welding clamping and fixing due to the short size of the steel throat, thereby causing a relatively complex welding process. The end position limiting and fixing mechanism for automobile brake pipe welding comprises a base, a support and a fixed plate are fixed to the outer side of the base, adjusting electric telescopic rods are fixed to the support and the fixed plate, four clamping cylinders are installed on the upper surface of the base, the clamping cylinders are connected with an air pump and a pneumatic electromagnetic valve through air pipes, and the clamping cylinders clamp and fix the workpiece from four sides of the workpiece. The application positions and supports the steel throat from the inside, does not block the welded part of the steel throat, reduces the welding difficulty of the steel throat, and thereby improves the welding efficiency of the steel throat.

Description

Technical Field

[0001] This invention relates to the field of brake pipe steel throat technology, specifically to an end limiting and fixing mechanism and its welding system for welding automotive brake pipes. Background Technology

[0002] Brake hoses typically refer to the pipes in a car's braking system that are responsible for transmitting brake fluid pressure. They are the key channels connecting the master cylinder and the wheel brakes, directly determining the sensitivity and effectiveness of the brakes. In the railway industry, similar components are called main brake pipes or train pipes, used to transmit braking commands throughout the entire train. Brake hoses are part of the brake piping system, which is the core component in a motor vehicle's braking system that transmits brake fluid. It consists of steel pipes, flexible hoses, and connectors. The steel pipes are also called steel hoses, which are connected to the brake hoses. The steel hoses need to be welded and fixed during production. Due to their size, steel hoses can lead to poor clamping and fixing during welding, causing the welding position at the end of the steel hose to be obstructed, resulting in a more complex welding process. Therefore, they do not meet the existing requirements. To address this, we propose an end-limiting and fixing mechanism and its welding system for welding automotive brake pipes. Summary of the Invention

[0003] The purpose of this invention is to provide an end-limiting and fixing mechanism for welding automotive brake pipes and its welding system, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an end-limiting and fixing mechanism for welding automotive brake pipes, comprising a base, a bracket and a fixing plate fixed on the outer side of the base, an adjustable electric telescopic rod fixed on the bracket and the fixing plate, and four clamping cylinders installed on the upper surface of the base. The clamping cylinders are connected to an air pump and a pneumatic solenoid valve through air pipes, and the workpiece is clamped and fixed from four sides using the clamping cylinders. The piston rod end of the adjustable electric telescopic rod is equipped with a positioning module. The positioning module includes a connecting rod, one end of which is fixed to the piston rod end of the adjustable electric telescopic rod, and the other end of which is fixed with a contact plate. A center rod is installed on the outer side of the contact plate, and a cavity is provided on the inner side of the center rod. Multiple sliding grooves are distributed in a circular array on the outer surface of the center rod. The sliding grooves connect to the cavity, and an adjusting slide plate is provided on the inner side of the cavity. The adjusting slide plate slides through the sliding groove, and a positioning plate is fixed on the side of the adjusting slide plate that passes through the sliding groove. The positioning plate and steel throat are used for internal support, positioning, and fixation, thereby ensuring that the steel throat coincides with the axis of the hole at the corresponding position on the workpiece being welded.

[0005] Preferably, the cavity is provided with an adjusting water bladder. An inlet pipe and an outlet pipe are fixed through the end of the adjusting water bladder near the contact plate. The inlet pipe and the outlet pipe pass through the end of the central rod and are connected to the water tank through a circulation pump. The adjusting slide plate is located between the adjusting water bladder and the sliding groove.

[0006] Preferably, the diameter of the contact plate is larger than the inner diameter of the steel throat but smaller than the outer diameter of the steel throat.

[0007] Preferably, the end of the central rod away from the contact plate is provided with a locking module. The locking module includes a sliding rod, which is slidably inserted into the interior of the central rod, and the axis of the sliding rod coincides with the axis of the central rod. A movable pressure block is fixed to the end of the sliding rod located outside the central rod, and multiple rotatable and adjustable positioning plates are distributed in a ring array on the outer side of the movable pressure block.

[0008] Preferably, the outer surface of the movable pressure block is provided with a plurality of adjustment grooves arranged in a ring array, the rotating pressure plate is located inside the adjustment groove, and the end of the rotating pressure plate located inside the adjustment groove is fixed with a shaft pin through it. The two ends of the shaft pin are rotatably inserted into the sliding rod, and a torsion spring is provided between the two ends of the shaft pin and the sliding rod.

[0009] Preferably, the rotating pressure plate has an adjusting magnet embedded inside, and the sliding rod has multiple through grooves inside. A through plate is slidably inserted into the inner side of the through groove. One end of the through plate is fixed to the central rod. The surface of the through plate facing the adjusting groove is inlaid with repulsive magnets and attracting magnets. The repulsive magnets magnetically repel the adjusting magnets, while the attracting magnets magnetically attract the adjusting magnets.

[0010] Preferably, a limiting block is fixed inside the adjusting groove, and an inclined surface is provided outside the limiting block, with the inclined surface facing the limiting block and tilted at an angle of 45 degrees.

[0011] Preferably, the locking module further includes a storage battery and an electromagnet. The electromagnet and the storage battery are connected by a wire and are located inside the central rod. When the electromagnet is energized, it magnetically attracts the sliding rod.

[0012] Preferably, the outer side of the sliding rod is provided with an annular protrusion, and a return spring is provided on one side of the annular protrusion. The return spring is sleeved on the outer side of the sliding rod and one end is in contact with the central rod. The magnetic attraction force of the electromagnet on the sliding rod is greater than the elastic force of the return spring.

[0013] An automotive brake pipe welding system includes an end-limiting and fixing mechanism for welding automotive brake pipes.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses a circulating pump to input liquid medium into the regulating water bladder. The regulating water bladder expands and pushes the regulating slide plate to slide outward of the central rod, so that the positioning plate is pushed and fits against the inner wall of the steel throat until the regulating water bladder fills the cavity inside the central rod. At this time, the regulating slide plate and the positioning plate cannot move. The positioning module positions and fixes the steel throat from inside the steel throat, thereby ensuring that the welding part between the steel throat and the workpiece being welded is not blocked by the fixing mechanism. This reduces the welding difficulty of the brake pipe steel throat, simplifies the welding process, and improves the welding efficiency of the brake pipe steel throat. 2. This invention utilizes a moving pressure block and a rotating pressure plate to bring the steel throat closer to the center rod. Once close, the rotating pressure plate presses against the inner wall of the workpiece being welded. In conjunction with the contact plate, force is applied from both ends of the steel throat, thereby preventing vibration of the steel throat in the axial direction and ensuring the welding quality of the steel throat. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the positioning module of the present invention; Figure 3 This is a schematic diagram of the structure of the central rod of the present invention; Figure 4 This is a schematic cross-sectional view of the central rod of the present invention; Figure 5 This is a schematic diagram of the locking module of the present invention; Figure 6 This is a schematic diagram of the unfolded rotating pressure plate of the present invention; Figure 7 This is a schematic diagram showing the connection between the central rod and the sliding rod of the present invention.

[0016] In the diagram: 1. Base; 2. Bracket; 3. Fixing plate; 4. Adjustable electric telescopic rod; 5. Positioning module; 501. Connecting rod; 502. Contact plate; 503. Center rod; 504. Positioning plate; 505. Sliding groove; 506. Adjustable water bladder; 507. Water inlet pipe; 508. Water outlet pipe; 509. Adjustable sliding plate; 6. Locking module; 601. Sliding rod; 602. Moving pressure block; 603. Adjusting groove; 604. Limiting block; 605. Rotating pressure plate; 606. Adjusting magnet; 607. Through plate; 608. Through sliding groove; 609. Repulsive magnet; 610. Attracting magnet; 611. Electromagnet; 612. Return spring; 613. Storage battery; 7. Clamping cylinder. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0018] like Figure 1 As shown, an end-limiting and fixing mechanism for welding automotive brake pipes includes a base 1, a bracket 2 and a fixing plate 3 fixed on the outer side of the base 1, an adjustable electric telescopic rod 4 fixed on the bracket 2 and the fixing plate 3, and four clamping cylinders 7 installed on the upper surface of the base 1. The clamping cylinders 7 are connected to an air pump and a pneumatic solenoid valve through air pipes. The clamping cylinders 7 are used to clamp and fix the workpiece from four sides, thereby preventing the workpiece and the steel hose from shaking or misaligning during welding.

[0019] like Figures 2 to 4 As shown, a positioning module 5 is installed at the piston rod end of the adjusting electric telescopic rod 4. The positioning module 5 includes a connecting rod 501. One end of the connecting rod 501 is fixed to the piston rod end of the adjusting electric telescopic rod 4, and a contact plate 502 is fixed at the other end of the connecting rod 501. A center rod 503 is installed on the outer side of the contact plate 502. A cavity is provided on the inner side of the center rod 503. Multiple sliding grooves 505 are distributed in a ring array on the outer surface of the center rod 503. The sliding grooves 505 are connected to the cavity, and an adjusting slide plate 509 is provided on the inner side of the cavity. The adjusting slide plate 509 slides through the sliding groove 505, and a positioning plate 504 is fixed on the side of the adjusting slide plate 509 passing through the sliding groove 505. The positioning plate 504 is used to support, position, and fix the steel throat from the inside, thereby ensuring that the steel throat coincides with the axis of the hole at the corresponding position on the workpiece being welded.

[0020] The cavity is equipped with an adjusting water bladder 506. An inlet pipe 507 and an outlet pipe 508 are fixed through the end of the adjusting water bladder 506 near the contact plate 502. The inlet pipe 507 and the outlet pipe 508 pass through the end of the central rod 503 and are connected to the water tank through a circulation pump. The adjusting slide plate 509 is located between the adjusting water bladder 506 and the sliding groove 505. By filling the adjusting water bladder 506 with liquid medium, the expanded adjusting water bladder 506 applies an outward thrust to the adjusting slide plate 509, thereby causing the positioning plate 504 to fit against the inner wall of the steel throat, thus fixing the steel throat.

[0021] The diameter of the contact plate 502 is larger than the inner diameter of the steel throat but smaller than the outer diameter of the steel throat, ensuring that the positioning module 5 can enter the interior of the steel throat, but the positioning module 5 will not completely pass through the steel throat.

[0022] like Figure 2 , Figures 5 to 7As shown, a locking module 6 is provided at the end of the center rod 503 away from the contact plate 502. The locking module 6 includes a sliding rod 601, which is slidably inserted into the center rod 503, and the axis of the sliding rod 601 coincides with the axis of the center rod 503. A movable pressure block 602 is fixed at the end of the sliding rod 601 located outside the center rod 503. Multiple rotatable and adjustable positioning plates 504 are distributed in a ring array on the outer side of the movable pressure block 602. The rotatable and adjustable positioning plates 504 are used to tighten from the inside of the welded part, and together with the contact plate 502, the steel throat is pressed against the surface of the welded workpiece.

[0023] The outer surface of the movable pressure block 602 is provided with multiple annularly arranged adjustment grooves 603. The rotating pressure plate 605 is located inside the adjustment grooves 603, and a shaft pin is fixed through the end of the rotating pressure plate 605 inside the adjustment grooves 603. The two ends of the shaft pin are rotatably inserted into the sliding rod 601, and a torsion spring is provided between the two ends of the shaft pin and the sliding rod 601. An adjustment magnet 606 is embedded through the interior of the rotating pressure plate 605. Multiple through grooves 608 are provided through the interior of the sliding rod 601, and through grooves 608 are slidably inserted into the inner side of the through grooves 608. Plate 607, one end of which is fixed to the central rod 503. The surface of the through plate 607 facing the adjustment groove 603 is inlaid with a repulsive magnet 609 and an attractive magnet 610. The repulsive magnet 609 magnetically repels the adjustment magnet 606, while the attractive magnet 610 magnetically attracts the adjustment magnet 606. When the moving pressure block 602 moves with the sliding rod 601, the repulsive magnet 609 and the attractive magnet 610 change the state of the adjustment magnet 606 and the rotating pressure plate 605, thereby realizing the rotational unfolding or rotational retraction of the rotating pressure plate 605.

[0024] A limiting block 604 is fixed inside the adjusting groove 603. The limiting block 604 has an inclined surface on its outer side, which faces the limiting block 604 and has an inclination angle of 45 degrees. The limiting block 604 is used to limit the rotation angle of the adjusting groove 603, so as to prevent the rotating pressure plate 605 from being unable to contact the inside of the workpiece after the moving pressure block 602 contacts the center rod 503.

[0025] The locking module 6 also includes a storage battery 613 and an electromagnet 611. The electromagnet 611 and the storage battery 613 are connected by wires and are located inside the central rod 503. When the electromagnet 611 is energized, it magnetically attracts the sliding rod 601. The outer side of the sliding rod 601 is provided with an annular protrusion, and a return spring 612 is provided on one side of the annular protrusion. The return spring 612 is sleeved on the outer side of the sliding rod 601 and one end is in contact with the central rod 503. The magnetic attraction force of the electromagnet 611 on the sliding rod 601 is greater than the elastic force of the return spring 612.

[0026] An automotive brake pipe welding system includes an end-limiting and fixing mechanism for welding automotive brake pipes.

[0027] When welding the steel hose to the workpiece, the workpiece is first placed on the surface of the base 1, and the workpiece is clamped and fixed from the side by four clamping cylinders 7. Then the steel hose is put on the outside of the positioning module 5. At this time, the power supply of the circulation pump connected to the water inlet pipe 507 is turned on. The circulation pump inputs the liquid medium into the interior of the regulating water bag 506. The regulating water bag 506 expands and pushes the regulating slide plate 509 to slide outward of the center rod 503, so that the positioning plate 504 is pushed and fits against the inner wall of the steel throat until the regulating water bag 506 fills the cavity inside the center rod 503. At this time, the regulating slide plate 509 and the positioning plate 504 cannot move. The positioning module 5 positions and fixes the steel throat from inside the steel throat. Then, the electric telescopic rod 4 is adjusted to start and drive the positioned steel throat to move towards the welding part of the workpiece. The locking module 6 enters the interior of the workpiece through the hole on the surface of the workpiece, so that the steel throat comes into contact with the workpiece. At this time, the electric telescopic rod 4 continues to move until the end of the steel throat is close to the end of the contact plate 502 and comes into contact with the contact plate 502 and is pressed. After the steel hose is compressed, the storage battery 613 supplies power to the electromagnet 611. The electromagnet 611 magnetically attracts the sliding rod 601, and the return spring 612 is compressed. The sliding rod 601 enters the interior of the central rod 503, and the moving pressure block 602 moves closer to the central rod 503. When the moving pressure block 602 moves, the through plate 607 passes through the through groove 608, causing the attracting magnet 610 and the adjusting magnet 606 to be misaligned, and the repulsive magnet 609 to move closer to the adjusting magnet 606. When the repulsive magnet 609 moves closer to the adjusting magnet 606, the adjusting magnet 606 moves closer to the adjusting magnet 606. When magnet 606 is in use, it repels the adjusting magnet 606. At the same time, the torsion spring at the end of the shaft pin is torn and reset, causing the rotating pressure plate 605 to rotate outward of the adjusting groove 603 until the rotating pressure plate 605 contacts the limiting block 604. When the moving pressure block 602 is in contact with the center rod 503, the end of the rotating and unfolded rotating pressure plate 605 presses against the inner wall of the workpiece being welded. In conjunction with the contact plate 502, force is applied from both ends of the steel throat, thereby preventing vibration of the steel throat in the axial direction and ensuring the welding quality of the steel throat.

[0028] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An end-limiting and fixing mechanism for welding automotive brake pipes, comprising a base (1), characterized in that: The base (1) is fixed with a bracket (2) and a fixing plate (3). An adjustable electric telescopic rod (4) is fixed on the bracket (2) and the fixing plate (3). Four clamping cylinders (7) are installed on the upper surface of the base (1). The clamping cylinders (7) are connected to an air pump and a pneumatic solenoid valve through an air pipe. The clamping cylinders (7) are used to clamp and fix the workpiece from four sides. The piston rod end of the adjustable electric telescopic rod (4) is equipped with a positioning module (5). The positioning module (5) includes a connecting rod (501). One end of the connecting rod (501) is fixed to the piston rod end of the adjustable electric telescopic rod (4). The other end of the connecting rod (501) is fixed with a contact plate (502). A center rod (503) is installed on the outside of the contact plate (502). A cavity is provided on the inside of the center rod (503). Multiple sliding grooves (505) are distributed in a ring array on the outer surface of the center rod (503). The sliding grooves (505) are connected to the cavity. An adjusting slide plate (509) is provided on the inside of the cavity. The adjusting slide plate (509) slides through the sliding groove (505). A positioning plate (504) is fixed on the side of the adjusting slide plate (509) passing through the sliding groove (505). The steel throat of the positioning plate (504) is supported, positioned and fixed from the inside, thereby ensuring that the steel throat coincides with the axis of the hole at the corresponding position on the workpiece to be welded.

2. The end-limiting and fixing mechanism for welding automotive brake pipes according to claim 1, characterized in that: The cavity is provided with an adjusting water bladder (506). The end of the adjusting water bladder (506) near the contact plate (502) is fixed with an inlet pipe (507) and an outlet pipe (508). The inlet pipe (507) and the outlet pipe (508) pass through the end of the central rod (503). The inlet pipe (507) and the outlet pipe (508) are connected to the water tank through a circulation pump. The adjusting slide plate (509) is located between the adjusting water bladder (506) and the sliding groove (505).

3. The end-limiting and fixing mechanism for welding automotive brake pipes according to claim 2, characterized in that: The diameter of the contact plate (502) is larger than the inner diameter of the steel throat but smaller than the outer diameter of the steel throat.

4. The end-limiting and fixing mechanism for welding automotive brake pipes according to claim 1, characterized in that: The end of the central rod (503) away from the contact plate (502) is provided with a locking module (6). The locking module (6) includes a sliding rod (601). The sliding rod (601) is slidably inserted into the interior of the central rod (503), and the axis of the sliding rod (601) coincides with the axis of the central rod (503). The end of the sliding rod (601) located outside the central rod (503) is fixed with a movable pressure block (602). Multiple rotatable and adjustable positioning plates (504) are distributed in a ring array on the outer side of the movable pressure block (602).

5. The end-limiting and fixing mechanism for welding automotive brake pipes according to claim 4, characterized in that: The outer surface of the movable pressure block (602) is provided with multiple annular arrayed adjustment grooves (603). The rotating pressure plate (605) is located inside the adjustment groove (603), and the end of the rotating pressure plate (605) located inside the adjustment groove (603) is fixed with a shaft pin. The two ends of the shaft pin are rotatably inserted into the sliding rod (601), and a torsion spring is provided between the two ends of the shaft pin and the sliding rod (601).

6. The end-limiting and fixing mechanism for welding automotive brake pipes according to claim 5, characterized in that: The rotating pressure plate (605) has an adjusting magnet (606) embedded inside. The sliding rod (601) has multiple through grooves (608) inside. A through plate (607) is slidably inserted into the inside of the through groove (608). One end of the through plate (607) is fixed to the central rod (503). The surface of the through plate (607) facing the adjusting groove (603) is inlaid with a repulsive magnet (609) and an adsorption magnet (610). The repulsive magnet (609) magnetically repels the adjusting magnet (606), while the adsorption magnet (610) magnetically attracts the adjusting magnet (606).

7. The end-limiting and fixing mechanism for welding automotive brake pipes according to claim 6, characterized in that: The inner side of the adjustment groove (603) is fixed with a limiting block (604), and the outer side of the limiting block (604) is provided with an inclined surface, which faces the limiting block (604) and has an inclination angle of 45 degrees.

8. The end-limiting and fixing mechanism for welding automotive brake pipes according to claim 7, characterized in that: The locking module (6) also includes a storage battery (613) and an electromagnet (611). The electromagnet (611) and the storage battery (613) are connected by a wire and located inside the central rod (503). When the electromagnet (611) is energized, it magnetically attracts the sliding rod (601).

9. The end-limiting and fixing mechanism for welding automotive brake pipes according to claim 8, characterized in that: The sliding rod (601) has an annular protrusion on its outer side, and a return spring (612) is provided on one side of the annular protrusion. The return spring (612) is sleeved on the outer side of the sliding rod (601) and one end is in contact with the central rod (503). The magnetic attraction force of the electromagnet (611) on the sliding rod (601) is greater than the elastic force of 5-2.

10. A welding system for automotive brake pipes, characterized in that: Includes the end-limiting and fixing mechanism for welding automotive brake pipes as described in any one of claims 1-9.

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