A positioning fixture for bridge welding

Abstract

This utility model discloses a positioning fixture for bridge axle welding, relating to the field of tooling and fixture technology. The positioning fixture includes an annular fixing plate and a positioning accessory. The annular fixing plate is fixed to a worktable, and its inner hole matches the outer circle of the oil pan of the bridge axle. At least two positioning pins are spaced apart along the edge of the annular fixing plate, each pin used to circumferentially limit the ends of the bridge axle. The positioning accessory is detachably connected to the inner hole of the annular fixing plate and is used to position the side of the bridge axle where the connecting plate is located. This positioning fixture can satisfy the function of positioning both the front and back sides of the bridge axle separately, reducing the procurement cost of positioning fixtures.

Description

Technical Field

[0001] This utility model relates to the field of tooling and fixture technology, and in particular to a positioning fixture for bridge welding. Background Technology

[0002] In the automotive industry, the axle housing refers to the central bulge section of the drive axle housing. It is a key component of the drive axle, primarily used to house and protect transmission components such as the final drive, differential, and half-shafts. The axle housing typically consists of two U-shaped half-shells, which are joined and welded together to form the axle housing. During the welding process, the two U-shaped half-shells require full welding on both the front and back sides. Currently, the axle housing is generally fixed during welding using positioning fixtures. However, some existing positioning fixtures for axle housing welding cannot simultaneously meet the function of positioning both the front and back sides of the axle housing. Positioning both sides requires two independent sets of positioning fixtures, each designed and manufactured separately, increasing the procurement cost of the positioning fixtures. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a positioning fixture for bridge cab welding, which can meet the function of positioning the front and back sides of the bridge cab separately, thereby reducing the procurement cost of the positioning fixture.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A positioning fixture for bridge axle welding includes an annular fixing plate and a positioning accessory. The annular fixing plate is fixed on a worktable, and the inner hole of the annular fixing plate matches the outer circle of the oil pan of the bridge axle. At least two positioning pins are provided at intervals along the edge of the annular fixing plate, and the two positioning pins are used to circumferentially limit the two ends of the bridge axle. The positioning accessory is detachably connected to the inner hole of the annular fixing plate and is used to position the side of the bridge axle on which the connecting plate is set.

[0006] In some embodiments, the positioning accessory includes a claw disc, a circular positioning disc, and a connecting bolt. The claw disc includes a circular disc body and a plurality of positioning claw portions spaced circumferentially on the sidewall of the circular disc body. The center of the circular disc body is provided with a first screw hole. The circular positioning disc is coaxially disposed at the top of the circular disc body. The outer diameter of the circular positioning disc is fitted with the inner diameter of the connecting disc with a small clearance. The center of the circular positioning disc is provided with a first through hole. The screw portion of the connecting bolt is provided with an annular step, and the screw portion of the connecting bolt passes through the first through hole and is threadedly connected to the first screw hole. The annular step is pressed against the top of the first through hole. The inner sidewall of the annular fixing disc is provided with a plurality of limiting through grooves that match the shape of the positioning claw portions spaced circumferentially. The bottom end of the annular fixing disc is coaxially fixed with a support ring, which is located below the limiting through grooves and is used to support the positioning claw portions.

[0007] In at least one embodiment, multiple positioning claws are radially distributed around the center of the circular disc, and the included angle between adjacent positioning claws is less than 180°.

[0008] In at least one embodiment, the positioning claw is a plate, and the outer end of the positioning claw and the inner end of the limiting groove are both semi-circular.

[0009] Compared with the prior art, this utility model achieves at least the following beneficial effects:

[0010] This positioning fixture includes a complete set of designed and manufactured annular fixing disc and positioning accessories, reducing the procurement cost of positioning fixtures. When welding the side of the bridge axle with the connecting disc and the two half-shells on that side, the positioning accessories are removed from the inner hole of the annular fixing disc. The outer circle of the bridge axle is placed in the inner hole of the annular fixing disc, and the outer circle of the oil pan of the bridge axle is positioned through the inner hole of the annular fixing disc. The annular fixing disc supports the bridge axle, and the positioning pins circumferentially limit the two ends of the bridge axle, thereby completing the fixation of the bridge axle. After completing the welding of the connecting disc half-shell and the connecting disc to the half-shell, the bridge axle is removed, the positioning accessories are placed in the inner hole of the annular fixing disc, and the bridge axle is rotated 180° and placed on the positioning accessories. The positioning accessories position the side of the bridge axle with the connecting disc, the annular fixing disc supports the bridge axle, and the positioning pins circumferentially limit the two ends of the bridge axle, thereby completing the fixation of the bridge axle. Attached Figure Description

[0011] Figure 1 This is an exploded view of an embodiment of this application;

[0012] Figure 2 This is a schematic diagram of the top structure of an embodiment of this application;

[0013] Figure 3 This is a schematic diagram of the bottom structure of an embodiment of this application;

[0014] Figure 4 This is a top view of the oil pan outer circle of the bridge assembly during positioning, according to an embodiment of this application.

[0015] The following are the labels in the diagram: 1. Annular fixing plate; 2. Positioning accessory; 21. Claw plate; 211. Circular plate body; 212. Positioning claw part; 22. Circular positioning plate; 23. Connecting bolt; 231. Annular step; 3. Positioning pin; 4. First screw hole; 5. First through hole; 6. Limiting through groove; 7. Support ring; 8. Second through hole; 9. Second screw hole; 10. Connecting hole; 20. Bridge; 201. Half shell; 30. Connecting plate. Detailed Implementation

[0016] The present invention will now be described in detail with reference to exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present application may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure of this application more complete and to fully convey the concept of the present application to those skilled in the art.

[0017] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. Moreover, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0018] like Figures 1-4As shown in the embodiment of this application, the positioning fixture for bridge abutment welding includes an annular fixing plate 1 and a positioning accessory 2. The bridge abutment 20 is usually welded from two arc-shaped half-shells 201 by a full welding process. A spherical surface is formed on the bridge abutment 20, and a circular planar opening is provided on the side opposite to the spherical surface. An annular connecting plate 30 is coaxially welded and fixed to the edge of the planar opening. The connecting plate 30 is a disc-shaped structure on the bridge abutment 20 that connects to the gearbox. The positioning fixture of this utility model is used to fix the bridge abutment 20 so that it maintains the correct position and posture during the welding process, ensuring welding quality and accuracy. The annular fixing plate 1 is fixed on the corresponding workbench, which is fixed on the ground. The inner hole of the annular fixing plate 1 matches the outer circle of the oil pan of the bridge axle 20. The annular fixing plate 1 positions the outer circle of the oil pan of the bridge axle 20 through the inner hole. At least two positioning pins 3 are provided at intervals along the edge of the annular fixing plate 1. The two positioning pins 3 are used to circumferentially limit the two ends of the bridge axle 20. The positioning accessory 2 is detachably connected to the inner hole of the annular fixing plate 1 and is used to position the side of the bridge axle 20 on which the connecting plate 30 is located.

[0019] refer to Figure 4 When using this positioning fixture, firstly, the side of the bridge axle 20 with the connecting plate 30 and the side of the two half-shells 201 are welded together. Then, the positioning accessory 2 is removed from the inner hole of the annular fixing plate 1. The outer circle of the oil pan on the bridge axle 20 is placed in the inner hole of the annular fixing plate 1. The inner hole of the annular fixing plate 1 positions the outer circle of the oil pan on the bridge axle 20. The annular fixing plate 1 supports the bridge axle 20, and the positioning pin 3 circumferentially limits the two ends of the bridge axle 20, thus completing the fixation of the bridge axle 20. (Reference) Figures 2-4 Then, the connecting plate half shell and the connecting plate to the half shell on the bridge bag 20 are welded. After the welding is completed, the bridge bag 20 is taken out. At this time, the positioning attachment 2 is placed into the inner hole of the annular fixing plate 1. Then, the bridge bag 20 is rotated 180° and placed on the positioning attachment 2. The positioning attachment 2 is used to position the side of the bridge bag 20 where the connecting plate 30 is set. The annular fixing plate 1 supports the bridge bag 20. The positioning pin 3 circumferentially limits the two ends of the bridge bag 20, thereby completing the fixation of the bridge bag 20.

[0020] refer to Figure 1The positioning accessory 2 includes a claw plate 21, a circular positioning plate 22, and a connecting bolt 23. The claw plate 21 includes a circular plate body 211 and multiple positioning claw portions 212 spaced circumferentially on the sidewall of the circular plate body 211. The center of the circular plate body 211 has a first screw hole 4. The circular positioning plate 22 is coaxially mounted on the top of the circular plate body 211. The outer diameter of the circular positioning plate 22 is in close clearance fit with the inner diameter of the connecting plate 30. The center of the circular positioning plate 22 has a first through hole 5. The screw portion of the connecting bolt 23 has a ring. The annular step 231 is formed by the threaded part of the connecting bolt 23 passing through the first through hole 5 and being threadedly connected to the first threaded hole 4. The annular step 231 is pressed on the top of the first through hole 5. The claw plate 21 and the circular positioning plate 22 are connected by the connecting bolt 23 to form an integral unit. The inner hole sidewall of the annular fixed plate 1 is provided with a plurality of limiting through grooves 6 that match the shape of the positioning claw 212 along the circumferential direction. The bottom end of the annular fixed plate 1 is coaxially fixed with a support ring 7, which is located below the limiting through grooves 6 and is used to support the positioning claw 212.

[0021] Preferably, multiple positioning claws 212 are radially distributed around the center of the circular disk 211, and the included angle between adjacent positioning claws 212 is less than 180°. The positioning claws 212 cooperate with the limiting groove 6 to achieve circumferential positioning of the claw disk 21 and the circular positioning disk 22. The positioning claws 212 are plate bodies, and the outer end of the positioning claws 212 and the inner end of the limiting groove 6 are both semi-circular to ensure that the positioning claws 212 are inserted into the limiting groove 6 more smoothly.

[0022] Preferably, the thickness of the claw disk 21 is equal to the thickness of the annular fixed disk 1, so that when the claw disk 21 is inserted into the inner hole of the annular fixed disk 1, the circular positioning disk 22 can protrude from the top of the annular fixed disk 1.

[0023] Preferably, the inner diameter of the support ring 7 is greater than or equal to the inner diameter of the annular fixing plate 1, so as to avoid affecting the positioning of the spherical surface of the bridge package 20 by the inner hole of the annular fixing plate 1.

[0024] Preferably, the ring 7 is provided with a plurality of second through holes 8 spaced apart along the circumference; the annular fixing plate 1 is provided with a plurality of second screw holes 9 spaced apart along the circumference, corresponding to the second through holes 8. The ring 7 and the annular fixing plate 1 are fixedly connected by screws, and the screws pass through the second through holes 8 and are threadedly connected to the second screw holes 9.

[0025] When the positioning attachment 2 is placed into the inner hole of the annular fixed plate 1, the positioning claw 212 is positioned on the corresponding limiting through groove 6, and the positioning of the inner hole of the connecting plate 30 is achieved by the raised circular positioning plate 22. The end face of the connecting plate 30 is positioned with the end face of the positioning claw 212 of the corresponding claw plate 21, and the claw plate 21 is supported by the support ring 7.

[0026] In addition, the edge of the annular fixing plate 1 is provided with a plurality of connecting holes 10 at circumferential intervals, and the connecting holes 10 are located on one side of the end of the bridge package 20; the positioning pin 3 is inserted into the connecting hole 10, and the positioning pin 3 performs circumferential positioning by blocking the end of the bridge package 20.

[0027] It should be understood that all the above embodiments are exemplary and not restrictive. Any modifications, equivalent changes and alterations made by those skilled in the art to the specific embodiments described above under the concept of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. A positioning jig for bridge pack welding, characterized by: It includes an annular fixing plate and a positioning accessory; the annular fixing plate is fixed on the worktable, the inner hole of the annular fixing plate matches the outer circle of the oil pan of the bridge axle, and at least two positioning pins are provided at intervals along the edge of the annular fixing plate, the two positioning pins are used to circumferentially limit the two ends of the bridge axle respectively; the positioning accessory is detachably connected to the inner hole of the annular fixing plate, and it is used to position the side of the bridge axle on which the connecting plate is set.

2. The positioning fixture for bridge welding according to claim 1, characterized in that: The positioning accessory includes a claw disc, a circular positioning disc, and a connecting bolt. The claw disc includes a circular disc body and multiple positioning claw portions spaced circumferentially on the sidewall of the circular disc body. The center of the circular disc body has a first screw hole. The circular positioning disc is coaxially mounted on the top of the circular disc body. The outer diameter of the circular positioning disc is fitted with the inner diameter of the connecting disc with a small clearance. The center of the circular positioning disc has a first through hole. The screw portion of the connecting bolt has an annular step, and the screw portion of the connecting bolt passes through the first through hole and is threadedly connected to the first screw hole. The annular step presses against the top of the first through hole. The inner sidewall of the annular fixing disc has multiple limiting through grooves spaced circumferentially, which match the shape of the positioning claw portions. A support ring is coaxially fixed at the bottom end of the annular fixing disc. The support ring is located below the limiting through grooves and is used to support the positioning claw portions.

3. The positioning fixture for bridge welding according to claim 2, characterized in that: The multiple positioning claws are radially distributed around the center of the circular disc, and the included angle between adjacent positioning claws is less than 180°.

4. The positioning fixture for bridge welding according to claim 3, characterized in that: The positioning claw is a plate, and both the outer end of the positioning claw and the inner end of the limiting groove are semi-circular.

5. The positioning fixture for bridge welding according to claim 2, characterized in that: The thickness of the claw disc is equal to the thickness of the annular fixed disc.

6. The positioning fixture for bridge welding according to claim 2, characterized in that: The inner diameter of the support ring is greater than or equal to the inner diameter of the annular fixing plate.

7. The positioning fixture for bridge welding according to claim 2, characterized in that: The ring support is provided with a plurality of second through holes spaced apart along its circumference; the annular fixing plate is provided with a plurality of second screw holes spaced apart along its circumference, corresponding to the second through holes, and the ring support and the annular fixing plate are fixedly connected by screws.

8. The positioning fixture for bridge welding according to claim 1, characterized in that: The annular fixing plate has multiple connecting holes spaced circumferentially along its edge, and the connecting holes are located on one side of the end of the bridge package; the positioning pin is inserted into the connecting hole.

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