Embedded positioning pin mechanism for automobile chassis structural part welding fixture

Abstract

The utility model discloses an embedded type positioning pin mechanism for an automobile chassis structural member welding fixture, which comprises a cylinder assembly and an embedded type positioning pin mechanism, the cylinder assembly comprises a cylinder and a cylinder joint, and the embedded type positioning pin mechanism comprises a cylinder connecting block, a cylinder supporting block, an embedded pin sleeve, a shaft sleeve, a positioning pin and a limiting block. The air cylinder is clamped before welding, a sample piece is placed in the positioning pin, the air cylinder is opened after welding, the positioning pin retreats, the sample piece is taken out, the structure is simple, the jackscrew is used for limiting after embedding, when the air cylinder executes actions, the positioning pin responds rapidly, the positioning pin is driven by the air cylinder to move up and down, and the welding efficiency is improved. The positioning pin withdrawing delay caused by distortion of a sample piece after welding thermal deformation is effectively avoided, abrasion is reduced, the service life is prolonged, the maintenance cost is reduced, meanwhile, piece taking is easy, and the production takt is not delayed.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile chassis structural component welding fixtures, in particular to an embedded positioning pin mechanism used for automobile chassis structural component welding fixtures. Background Art

[0002] The automobile chassis is an important part of the vehicle. It is not only related to the vehicle's structure, load-bearing capacity, safety, stability, sports characteristics and comfort, but also involves the reasonable layout and effective combination of various systems to ensure the overall performance and stability of the vehicle. The automobile chassis consists of four parts: the transmission system, the running system, the steering system and the braking system. It bears the overall weight of the vehicle and ensures the normal operation of the vehicle. The automobile chassis structure also includes some other important components, such as control arms, shock absorbers, steering knuckles (shrouds), half shafts, universal joints, drive shafts, wheel hub bearings, differentials and differential locks. At the same time, according to the different body structures, the chassis can be divided into load-bearing and non-load-bearing types. The non-load-bearing chassis has a beam running through the body, while the load-bearing type has no beam but is equipped with a subframe.

[0003] The welding of automobile chassis structural parts is a key link in the automobile manufacturing process, which involves a variety of welding technologies and processes to ensure the strength and durability of the chassis. When welding automobile chassis structural parts, the positioning pins are often designed as inactive dead pins when designing the positioning mechanism, which makes it difficult to remove the sample due to thermal deformation after welding, delaying production. Utility Model Content

[0004] The utility model aims to make up for the defects of the prior art and provide an embedded positioning pin mechanism for a welding fixture of a chassis structural part of an automobile.

[0005] The utility model is realized by the following technical solutions:

[0006] An embedded positioning pin mechanism for a welding fixture for automobile chassis structural parts comprises a cylinder support block, a cylinder connecting block, a cylinder, a pin sleeve and a positioning pin, wherein the cylinder connecting block is fixed to the lower end of the cylinder support block, the cylinder is fixedly installed at the lower end of the cylinder connecting block, an axial center through hole is opened on the cylinder support block, the cylinder piston rod extends into the cylinder support block, the pin sleeve is fixed to the top end of the cylinder piston rod, and the positioning pin is fixed to the top end of the pin sleeve; the pin sleeve comprises an upper end cylinder, a mounting rod is fixed to the lower end of the upper end cylinder, the mounting rod is fixedly connected to the top end of the cylinder piston rod, a mounting hole is opened at the center of the top end of the upper end cylinder, a top screw hole connected to the mounting hole is opened on the side of the upper end cylinder, the lower end of the positioning pin extends into the mounting hole and is fixed by the top screw in the top screw hole.

[0007] A shaft sleeve is arranged between the upper end cylinder of the pin sleeve and the inner wall of the cylinder support block.

[0008] A limiting block is fixed on the top end of the cylinder support block, a hole for a positioning pin to pass through is opened in the center of the limiting block, and the top end of the positioning pin passes through the limiting block.

[0009] The advantages of the utility model are: the utility model clamps the cylinder before welding, places the sample in the locating pin, opens the cylinder after welding, withdraws the locating pin, and takes out the sample; the structure is simple, and the positioning is limited by the top screw after embedding; when the cylinder executes the action, the locating pin responds quickly, and the locating pin is driven up and down by the cylinder, which effectively avoids the delay in withdrawing the locating pin caused by the distortion after the thermal deformation of the sample welding, reduces wear and tear, increases service life, reduces maintenance costs, and is easy to take out without delaying the production rhythm. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model;

[0011] Figure 2 This is a schematic diagram of the structure of the pin sleeve of the utility model;

[0012] Figure 3 This is a schematic diagram of the positioning pin structure of the utility model;

[0013] Figure 4 It is a schematic diagram of the top screw structure of the utility model. DETAILED DESCRIPTION

[0014] like Figure 1 , 2 As shown in , 3 and 4, an embedded positioning pin mechanism for a welding fixture of a chassis structure of an automobile comprises a cylinder support block 4, a cylinder connecting block 3, a cylinder 1, a pin sleeve 5 and a positioning pin 7. The cylinder connecting block 3 is fixed to the lower end of the cylinder support block 4, the cylinder 1 is fixedly mounted on the lower end of the cylinder connecting block 3, an axial center through hole is opened on the cylinder support block 4, the cylinder piston rod 2 extends into the cylinder support block 4, the pin sleeve 5 is fixed to the top end of the cylinder piston rod 2, and the pin sleeve 5 is fixed at the top end of the pin sleeve 5. The positioning pin 7; the pin sleeve 5 includes an upper end cylinder 51, a mounting rod 52 is fixed at the lower end of the upper end cylinder 51, the mounting rod 52 is fixedly connected to the top end of the cylinder piston rod 2, a mounting hole 53 is opened at the center of the top end of the upper end cylinder 51, and a top screw hole 54 connected to the mounting hole 52 is opened on the side of the upper end cylinder 51. The lower end of the positioning pin 7 extends into the mounting hole and is fixed by a top screw 9 in the top screw hole 54. After being fixed by the top screw 9, it cannot be pulled out and is not prone to shaking.

[0015] A shaft sleeve 6 is provided between the upper cylindrical body 51 of the pin sleeve 5 and the inner wall of the cylinder support block 4 to play a guiding role and prevent deviation during movement.

[0016] A limiting block 8 is fixed on the top end of the cylinder support block 4 , a hole for the positioning pin 7 to pass through is opened in the center of the limiting block 8 , and the top end of the positioning pin 7 passes through the limiting block 8 .

[0017] Through the design of the above structure, the cylinder 1 drives the positioning pin 7 to move up and down. Before welding, the cylinder 1 is clamped, the positioning pin 7 is pushed out, and the sample is placed in the positioning pin 7. After welding, the cylinder is opened, the positioning pin 7 is withdrawn, and the sample is taken out. It effectively avoids the delay in the withdrawal of the positioning pin 7 caused by the distortion after the thermal deformation of the sample welding, reduces wear and tear, increases service life, reduces maintenance costs, and is easy to take out without delaying the production cycle.

Claims

1. An embedded positioning pin mechanism for a welding fixture for automobile chassis structural parts, characterized in that: It includes a cylinder support block, a cylinder connecting block, a cylinder, a pin sleeve and a locating pin. The cylinder connecting block is fixed at the lower end of the cylinder support block, and the cylinder is fixedly installed at the lower end of the cylinder connecting block. An axial center through hole is opened on the cylinder support block, and the cylinder piston rod extends into the cylinder support block. The pin sleeve is fixed at the top end of the cylinder piston rod, and the locating pin is fixed at the top end of the pin sleeve; the pin sleeve includes an upper cylinder, a mounting rod is fixed at the lower end of the upper cylinder, the mounting rod is fixedly connected to the top end of the cylinder piston rod, a mounting hole is opened at the center of the top end of the upper cylinder, and a top screw hole connected to the mounting hole is opened on the side of the upper cylinder, and the lower end of the locating pin extends into the mounting hole and is fixed by the top screw in the top screw hole.

2. The embedded positioning pin mechanism for a welding fixture for automobile chassis structural parts according to claim 1, characterized in that: A shaft sleeve is arranged between the upper end cylinder of the pin sleeve and the inner wall of the cylinder support block.

3. The embedded positioning pin mechanism for a welding fixture for automobile chassis structural parts according to claim 1, characterized in that: A limiting block is fixed on the top end of the cylinder support block, a hole for a positioning pin to pass through is opened in the center of the limiting block, and the top end of the positioning pin passes through the limiting block.

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