A method for fixing an engineering vehicle rear axle housing for welding

Abstract

The present application relates to the technical field of rear axle housing fixing, particularly to a fixing method for welding the rear axle housing of an engineering vehicle, which is as follows: step 1: the housing is hoisted by a travelling crane to above a tooling, and a guide rod is used to assist the housing to fall into position against a support; step 2: a first hole pin assembly is used to mainly position a first hole of the housing, and a second hole pin assembly and a third hole pin assembly are respectively used to assist in positioning a second hole and a third hole of the housing; step 3: after the housing is positioned, the two sliders of the first hole pin assembly are slid outward so that the first pressing plate is pressed on the first hole; then the anti-loosening pad plate is slid into the two limiting openings and locked on the core seat by the anti-loosening bolts; finally, the sliders are locked on the core seat by the first hole pin bolts; the present application can strengthen the fixing of the first hole and prevent the housing from falling off.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rear axle housing fixing, in particular to a fixing method for welding of a rear axle housing of an engineering vehicle. BACKGROUND

[0002] A large-horsepower rear axle housing is designed to bear a large torque and power, can adapt to the output of a high-horsepower engine, and ensures the stability and reliability of the engineering vehicle under heavy load. The rear axle housing transmits the power output by the engine to the driving wheels through the gearbox, realizing the running and working functions of the tractor. Its internal structure includes a center transmission, a steering mechanism and a final drive, etc., ensuring that the power is distributed to the left and right driving wheels after being reduced, increased in torque and changed in power transmission direction. It plays a core role in the entire vehicle structure and power transmission.

[0003] The rear axle housing is an important structural component of the vehicle, which needs to bear the weight and impact force during vehicle running, so welding work needs to be carried out during production to ensure the strength and stability of the rear axle and the strength and stability of the entire vehicle body.

[0004] The production of medium and large steel structural parts of engineering machinery such as excavators and loaders has the following difficulties in the welding process: many varieties, small batch; large size and heavy weight of workpiece; complex workpiece shape, welds are distributed in three-dimensional space according to the shape of the workpiece, the workpiece needs to be rotated and turned repeatedly during welding; large workpiece welding angle size, multi-layer and multi-pass welding is required, and the labor intensity is large.

[0005] The rear axle housing is welded from multiple parts. First, the multiple parts are spot welded together, and then the welds are further welded after spot welding.

[0006] For example, Figure 1 The rear axle housing 2 has a first hole 201, a second hole 202 and a third hole 203. The first hole 201 is located at the center of the rear axle housing 2 and has a larger inner diameter than the second hole 202 and the third hole 203. Therefore, after the rear axle housing 2 is fixed on the tooling, most of the weight is concentrated on the fixed position of the first hole 201. During the welding process, the workpiece needs to be rotated and turned repeatedly. During the rotation and turning process, if the fixation of the first hole 201 fails or is not firm, there is a risk of falling. SUMMARY

[0007] The purpose of the present application is to provide a fixing method for welding of a rear axle housing of an engineering vehicle, which can strengthen the fixation of the first hole.

[0008] The technical solution of the present application is as follows:

[0009] A fixing method for welding of a rear axle housing of an engineering vehicle, the method is as follows:

[0010] Step 1: The box is hoisted by the travelling crane to above the tooling, and the box is positioned with the aid of the guide rod and the abutment;

[0011] Step 2: The first hole of the box is mainly positioned by the first hole pin assembly, and the second hole and the third hole of the box are respectively positioned by the second hole pin assembly and the third hole pin assembly;

[0012] Step 3: After the box is positioned, the two sliders of the first hole pin assembly are slid outward, so that the first pressing plate is pressed on the first hole; then the anti-loosening pad plate is slid into the two limiting openings and locked on the core seat by the anti-loosening bolts; finally, the sliders are locked on the core seat by the first hole pin bolts;

[0013] Step 4: After the box is fixed by the first hole pin assembly, the second pressing plate of the second hole pin assembly is placed on the second hole, and the second pressing plate is locked on the second pin seat by the second hole pin bolts, so that the second pressing plate is pressed tightly on the second hole of the box; the third pressing plate of the third hole pin assembly is placed on the third hole, and the third pressing plate is locked on the third pin seat by the third hole pin bolts, so that the third pressing plate is pressed tightly on the third hole of the box;

[0014] Step 5: Then, the tail pressing plate of the tail pressing assembly is placed on the tail of the box, the tail pressing plate is locked on the tail fixing seat by the first tail bolt, and the tail pressing plate is locked on the tail fixing plate by the second tail bolt, so that the tail pressing plate is pressed tightly on the tail of the box;

[0015] Step 6: The upper bevel pressing plate of the upper bevel pressing assembly is placed on the upper bevel of the box, and the end with the heightening block is placed on the upper bevel fixing plate, the upper bevel pressing plate is locked on the upper bevel fixing seat by the upper bevel bolt, so that the upper bevel pressing plate is pressed tightly on the upper bevel of the box;

[0016] Step 7: The back pressing plate of the back pressing assembly is placed on the back of the box, and the end with the heightening block is placed on the back fixing plate, the back pressing plate is locked on the back fixing seat by the back bolt, so that the back pressing plate is pressed tightly on the back of the box;

[0017] Step 8: The screw rod of the side clamping assembly is rotated to drive the jacking block to move, so that the jacking block is jacked on the side of the box.

[0018] Further, the tooling includes a base, the base is provided with a first hole pin assembly; the first hole pin assembly includes a core seat fixed on the base, two symmetrical sliding grooves are opened on the core seat, a sliding block is arranged in the sliding groove, the sliding block is fixed on the core seat through a first hole pin bolt, so as to facilitate the sliding block to be pressed on the first hole of the box body; a lock washer is arranged between the two sliding blocks to resist the two sliding blocks and prevent the two sliding blocks from sliding towards each other; the lock washer is fixed on the core seat through a lock bolt.

[0019] Further, the shape of the sliding groove is inverted T-shaped; the sliding block includes an inverted T-shaped sliding block matched with the sliding groove, and a first pressing plate; the inner side of the first pressing plate has a limiting opening, so as to facilitate the lock washer to resist the sliding block.

[0020] Further, the base is further provided with a tail down pressing assembly; the tail down pressing assembly includes a plurality of tail fixing plates fixed on the base, a tail fixing seat is fixed between every two adjacent tail fixing plates, a tail pressing plate is arranged above the tail fixing plate; the tail pressing plate is fixed on the tail fixing seat through a first tail bolt and arranged on the tail fixing plate through a second tail bolt, so as to facilitate the tail pressing plate to be pressed on the tail of the box body.

[0021] Further, the base is further provided with an upper bevel down pressing assembly; the upper bevel down pressing assembly includes two upper bevel fixing plates fixed on the base, an upper bevel fixing seat is fixed between the two upper bevel fixing plates, an upper bevel pressing plate is arranged above the upper bevel fixing plate, the upper bevel pressing plate is fixed on the upper bevel fixing seat through an upper bevel bolt, so as to facilitate the upper bevel pressing plate to be pressed on the upper bevel of the box body; the end of the upper bevel pressing plate is in contact with the upper bevel fixing plate through an upper bevel pad.

[0022] Further, the base is further provided with a second hole pin assembly; the second hole pin assembly includes a second pin seat fixed on the base, a second pressing plate is arranged above the second pin seat, the second pressing plate is fixed on the second pin seat through a second hole pin bolt, so as to facilitate the second pressing plate to be pressed on the second hole of the box body.

[0023] Further, the base is further provided with a third hole pin assembly; the third hole pin assembly includes two third pin seats fixed on the base, a third pressing plate is arranged above the third pin seat, the third pressing plate is fixed on the third pin seat through a third hole pin bolt, so as to facilitate the third pressing plate to be pressed on the third hole of the box body.

[0024] Further, the base is further provided with a back lower pressing assembly; the back lower pressing assembly comprises two back fixed plates fixed on the base, a back fixed seat fixed between the two back fixed plates, a back pressing plate arranged above the back fixed plate, and the back pressing plate is fixed on the back fixed seat through back bolts, so that the back pressing plate is pressed on the back of the box body; and the end of the back pressing plate is in contact with the back fixed plate through a back pad block.

[0025] Further, the base is further provided with a side clamping assembly; the side clamping assembly comprises two support seats fixed on the base, a screw rod threadedly connected to the support seat, and a jacking block connected to the end of the screw rod through a bearing, so that the jacking block is jacked on the side of the box body.

[0026] Further, the base is further fixed with a guide rod for assisting the positioning of the box body.

[0027] The beneficial effects of the present application are as follows:

[0028] When the rear axle box body is turned down, most of the overall weight is concentrated on the first pressing plate and the first hole pin bolt, and there is a risk of falling. When the first hole pin bolt is broken, the anti-loosening pad is pressed in the limiting opening of the first pressing plate, preventing the two sliding blocks from sliding towards each other and losing the clamping of the first hole, so as to prevent the box body from falling.

[0029] The present application can strengthen the fixation of the first hole and prevent falling. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic view of the box body.

[0031] Figure 2 is a structural schematic view of the present application.

[0032] Figure 3 is a structural schematic view of the tooling.

[0033] Figure 4 is a structural schematic view of the first hole pin assembly.

[0034] Figure 5 is a structural schematic view of the limiting opening.

[0035] Figure 6 is a structural schematic view of the tail lower pressing assembly and the side clamping assembly.

[0036] Figure 7 is a structural schematic view of the upper inclined edge lower pressing assembly.

[0037] Figure 8 is a structural schematic view of the second hole pin assembly and the third hole pin assembly.

[0038] Figure 9 is a structural schematic diagram of the back lower pressing assembly. DETAILED DESCRIPTION

[0039] The application will be further described below with reference to the drawings.

[0040] As Figures 1-9 shown, the application provides a fixing method for welding of an engineering vehicle rear axle housing, the method being as follows:

[0041] Step 1: the housing is hoisted by a travelling crane to above the tooling, and the housing is assisted to be positioned by the guide rod when leaning against the wall;

[0042] Step 2: the first hole of the housing is mainly positioned by the first hole pin assembly, and the second hole and the third hole of the housing are respectively assisted to be positioned by the second hole pin assembly and the third hole pin assembly;

[0043] Step 3: after the housing is positioned, the two sliders of the first hole pin assembly are slid outward, so that the first pressing plate is pressed on the first hole; then the anti-loosening base plate is slid into the two limiting openings and locked on the core seat by the anti-loosening bolt; finally, the sliders are locked on the core seat by the first hole pin bolt;

[0044] Step 4: after the housing is fixed by the first hole pin assembly, the second pressing plate of the second hole pin assembly is placed on the second hole, the second pressing plate is locked on the second pin seat by the second hole pin bolt, so that the second pressing plate is pressed tightly on the second hole of the housing; the third pressing plate of the third hole pin assembly is placed on the third hole, the third pressing plate is locked on the third pin seat by the third hole pin bolt, so that the third pressing plate is pressed tightly on the third hole of the housing;

[0045] Step 5: then, the tail pressing plate of the tail lower pressing assembly is placed on the tail of the housing, the tail pressing plate is locked on the tail fixing seat by the first tail bolt and locked on the tail fixing plate by the second tail bolt, so that the tail pressing plate is pressed tightly on the tail of the housing;

[0046] Step 6: the upper bevel pressing plate of the upper bevel lower pressing assembly is placed on the upper bevel of the housing, one end with a heightening block is placed on the upper bevel fixing plate, the upper bevel pressing plate is locked on the upper bevel fixing seat by the upper bevel bolt, so that the upper bevel pressing plate is pressed tightly on the upper bevel of the housing;

[0047] Step 7: the back pressing plate of the back pressing assembly is placed on the back of the housing, one end with a heightening block is placed on the back fixing plate, the back pressing plate is locked on the back fixing seat by the back bolt, so that the back pressing plate is pressed tightly on the back of the housing;

[0048] Step 8: the screw rod of the side clamping assembly is rotated to drive the jacking block to move, so that the jacking block is jacked on the side of the housing.

[0049] The tool includes a base 1, and a first hole pin assembly 3 is arranged on the base 1; the first hole pin assembly 3 is used for pressing a first hole 201 of a box body 2.

[0050] The first hole pin assembly 3 includes a core seat 31 fixed on the base 1, two symmetrical sliding grooves 32 are arranged on the core seat 31, sliding blocks 33 are arranged in the sliding grooves 32, the sliding blocks 33 are fixed on the core seat 31 through first hole pin bolts 34, so as to facilitate the sliding blocks 33 to be pressed on the first hole 201 of the box body 2; a loosening pad 35 for abutting against the two sliding blocks 33 is arranged between the two sliding blocks 33, so as to prevent the two sliding blocks 33 from sliding towards each other; and the loosening pad 35 is fixed on the core seat 31 through loosening bolts 36.

[0051] The sliding groove 32 is in the shape of an inverted T; the sliding block 33 includes an inverted T-shaped sliding block 33 matched with the sliding groove 32, and a first pressing plate 38; the inner side of the first pressing plate 38 is provided with a limiting opening 37, so as to facilitate the loosening pad 35 to abut against the sliding block 33.

[0052] The two sliding blocks 33 are slid inward, then the first hole 201 of the box body 2 is placed in alignment with the core seat 31, after the placement is completed, the two sliding blocks 33 are slid outward, so that the first pressing plate 38 is pressed on the first hole 201; then the loosening pad 35 is slid into the two limiting openings 37, and is locked on the core seat 31 through the loosening bolts 36; finally, the sliding blocks 33 are locked on the core seat 31 through the first hole pin bolts 34. When the first hole pin bolts 34 are broken, the loosening pad 35 is pressed against the limiting opening 37 of the first pressing plate 38, so as to prevent the two sliding blocks 33 from sliding towards each other and losing the clamping groove pressing of the first hole 201, thereby preventing the box body 2 from falling, and playing a role of preventing falling.

[0053] A plurality of hoisting bolts 39 are fixed on the periphery of the core seat 31, the core seat 31 is fixed on the base 1 through screws, and when the first hole pin assembly 3 is disassembled and replaced, the hoisting bolts 39 can facilitate the hoisting of the first hole pin assembly 3.

[0054] The base 1 is further provided with a tail portion pressing assembly 4, and the tail portion pressing assembly 4 is used for pressing a tail portion of the box body 2; the tail portion pressing assembly 4 includes a plurality of tail portion fixing plates 41 fixed on the base 1, a tail portion fixing seat 42 is fixed between every two adjacent tail portion fixing plates 41, and a tail portion pressing plate 43 is arranged above the tail portion fixing plate 41; the tail portion pressing plate 43 is fixed on the tail portion fixing seat 42 through first tail portion bolts 44, and is arranged on the tail portion fixing plate 41 through second tail portion bolts 45, so as to facilitate the tail portion pressing plate 43 to be pressed on the tail portion of the box body 2.

[0055] The tail pressing plate 43 is placed at the tail of the box body 2, and the tail pressing plate 43 is locked on the tail fixing seat 42 through the first tail bolt 44 and locked on the tail fixing plate 41 through the second tail bolt 45, so that the tail pressing plate 43 is pressed on the tail of the box body 2 and the tail of the box body 2 can be fixed.

[0056] The base 1 is further provided with an upper bevel down-pressing assembly 5 for pressing the upper bevel of the box body 2. The upper bevel down-pressing assembly 5 comprises two upper bevel fixing plates 51 fixed on the base 1, and an upper bevel fixing seat 52 fixed between the two upper bevel fixing plates 51. An upper bevel pressing plate 53 is arranged above the upper bevel fixing plate 51 and is fixed on the upper bevel fixing seat 52 through an upper bevel bolt 54, so as to press the upper bevel pressing plate 53 on the upper bevel of the box body 2. The end of the upper bevel pressing plate 53 is in contact with the upper bevel fixing plate 51 through an upper bevel pad 55.

[0057] The upper bevel pressing plate 53 is placed on the upper bevel of the box body 2, one end with the upper bevel pad 55 is placed on the upper bevel fixing plate 51, and the upper bevel pressing plate 53 is locked on the upper bevel fixing seat 52 through the upper bevel bolt 54, so that the upper bevel pressing plate 53 is pressed on the upper bevel of the box body 2 and the upper bevel of the box body 2 can be fixed.

[0058] The base 1 is further provided with a second hole pin assembly 6 for pressing the second hole 202 of the box body 2. The second hole pin assembly 6 comprises a second pin seat 61 fixed on the base 1, and a second pressing plate 62 arranged above the second pin seat 61 and fixed on the second pin seat 61 through a second hole pin bolt 63, so as to press the second pressing plate 62 on the second hole 202 of the box body 2.

[0059] The second hole 202 of the box body 2 is aligned with the second pin seat 61, and then the second pressing plate 62 is placed on the second hole 202, and the second pressing plate 62 is locked on the second pin seat 61 through the second hole pin bolt 63, so that the second pressing plate 62 is pressed on the second hole 202 of the box body 2 and the second hole 202 of the box body 2 can be fixed.

[0060] The base 1 is further provided with a third hole pin assembly 7 for pressing the third hole 203 of the box body 2. The third hole pin assembly 7 comprises two third pin seats 71 fixed on the base 1, and a third pressing plate 72 arranged above the third pin seat 71 and fixed on the third pin seat 71 through a third hole pin bolt 73, so as to press the third pressing plate 72 on the third hole 203 of the box body 2.

[0061] The third hole 203 of the box body 2 is aligned with the third pin seat 71, then the third pressing plate 72 is placed on the third hole 203, the third pressing plate 72 is locked on the third pin seat 71 through the third hole pin bolt 73, so that the third pressing plate 72 is pressed on the third hole 203 of the box body 2, and the third hole 203 of the box body 2 can be fixed.

[0062] The back surface pressing assembly 8 is arranged on the base 1 and is used for pressing the back surface of the box body 2.

[0063] The back surface pressing plate 83 is placed on the back surface of the box body 2, one end with the back surface pad block 85 is placed on the back surface fixed plate 81, the back surface pressing plate 83 is locked on the back surface fixed seat 82 through the back surface bolt 84, so that the back surface pressing plate 83 is pressed on the back surface of the box body 2, and the back surface of the box body 2 can be fixed.

[0064] The side surface clamping assembly 9 is arranged on the base 1 and is used for clamping the side surface of the box body 2.

[0065] The base 1 is further provided with the guide rod 10 for assisting the box body 2 to be positioned.

[0066] The above only describes the preferred embodiments of the present application, and should not be construed as limiting the present application, and any equivalent changes and modifications made within the scope of the present application should be included in the scope of the present application.

Claims

1. A method of securing an engineered vehicle rear axle housing weld, comprising: The method is as follows: Step 1: the box is hoisted by a travelling crane to above the tool, and is positioned by a guide rod as a backstop; Step 2: the first hole of the box is mainly positioned by the first hole pin assembly, and the second hole and the third hole of the box are respectively positioned by the second hole pin assembly and the third hole pin assembly; Step 3: after the box is positioned, the two sliders of the first hole pin assembly are slid outward, so that the first pressing plate is pressed on the first hole; then the anti-loosening pad plate is slid into the two limiting openings and is locked on the core seat by the anti-loosening bolt; finally, the sliders are locked on the core seat by the first hole pin bolt; Step 4: after the box is fixed by the first hole pin assembly, the second pressing plate of the second hole pin assembly is placed on the second hole, the second pressing plate is locked on the second pin seat by the second hole pin bolt, so that the second pressing plate is pressed tightly on the second hole of the box; the third pressing plate of the third hole pin assembly is placed on the third hole, the third pressing plate is locked on the third pin seat by the third hole pin bolt, so that the third pressing plate is pressed tightly on the third hole of the box; Step 5: then, the tail pressing plate of the tail pressing assembly is placed on the tail of the box, the tail pressing plate is locked on the tail fixing seat by the first tail bolt, and the tail pressing plate is locked on the tail fixing plate by the second tail bolt, so that the tail pressing plate is pressed tightly on the tail of the box; Step 6: the upper bevel pressing plate of the upper bevel pressing assembly is placed on the upper bevel of the box, one end with a heightening block is placed on the upper bevel fixing plate, the upper bevel pressing plate is locked on the upper bevel fixing seat by the upper bevel bolt, so that the upper bevel pressing plate is pressed tightly on the upper bevel of the box; Step 7: the back pressing plate of the back pressing assembly is placed on the back of the box, one end with a heightening block is placed on the back fixing plate, the back pressing plate is locked on the back fixing seat by the back bolt, so that the back pressing plate is pressed tightly on the back of the box; Step 8: the screw rod of the side clamping assembly is rotated to drive the jacking block to move, so that the jacking block is jacked on the side of the box; The tool comprises a base, and the base is provided with a first hole pin assembly; the first hole pin assembly comprises a core seat fixed on the base, two symmetrical sliding grooves are formed in the core seat, sliding blocks are arranged in the sliding grooves, and the sliding blocks are fixed on the core seat by first hole pin bolts, so as to facilitate the sliding blocks to be pressed on the first hole of the box; an anti-loosening pad plate for abutting against the two sliding blocks is arranged between the two sliding blocks, so as to prevent the two sliding blocks from sliding towards each other; and the anti-loosening pad plate is fixed on the core seat by an anti-loosening bolt; The base is also provided with a tail pressing assembly; the tail pressing assembly comprises a plurality of tail fixing plates fixed on the base, a tail fixing seat is fixed between every two adjacent tail fixing plates, and a tail pressing plate is arranged above the tail fixing plate; the tail pressing plate is fixed on the tail fixing seat by a first tail bolt and is arranged on the tail fixing plate by a second tail bolt, so as to facilitate the tail pressing plate to be pressed on the tail of the box. The base is further provided with an upper bevel down-pressing assembly; the upper bevel down-pressing assembly comprises two upper bevel fixing plates fixed on the base, an upper bevel fixing seat fixed between the two upper bevel fixing plates, an upper bevel pressing plate arranged above the upper bevel fixing plate, and the upper bevel pressing plate is fixed on the upper bevel fixing seat through upper bevel bolts, so as to facilitate the upper bevel pressing plate to be pressed on the upper bevel of the box body; the end of the upper bevel pressing plate is in contact with the upper bevel fixing plate through an upper bevel pad block. The base is further provided with a back down-pressing assembly; the back down-pressing assembly comprises two back fixing plates fixed on the base, a back fixing seat fixed between the two back fixing plates, a back pressing plate arranged above the back fixing plate, and the back pressing plate is fixed on the back fixing seat through back bolts, so as to facilitate the back pressing plate to be pressed on the back of the box body; the end of the back pressing plate is in contact with the back fixing plate through a back pad block.

2. The method of claim 1, wherein, The shape of the sliding groove is inverted T-shaped; the sliding block comprises an inverted T-shaped sliding block matched with the sliding groove, and a first pressing plate; the inner side of the first pressing plate is provided with a limiting opening, so as to facilitate the anti-loose pad to abut against the sliding block.

3. The method of claim 1, wherein, The base is further provided with a second hole pin assembly; the second hole pin assembly comprises a second pin seat fixed on the base, a second pressing plate arranged above the second pin seat, and the second pressing plate is fixed on the second pin seat through a second hole pin bolt, so as to facilitate the second pressing plate to be pressed on the second hole of the box body.

4. The method of claim 1, wherein, The base is further provided with a third hole pin assembly; the third hole pin assembly comprises two third pin seats fixed on the base, a third pressing plate arranged above the third pin seat, and the third pressing plate is fixed on the third pin seat through a third hole pin bolt, so as to facilitate the third pressing plate to be pressed on the third hole of the box body.

5. The method of claim 1, wherein, The base is further provided with a side clamping assembly; the side clamping assembly comprises two support seats fixed on the base, a screw rod threadedly connected to the support seat, and a jacking block connected to the end of the screw rod through a bearing, so as to facilitate the jacking block to be jacked on the side of the box body.

6. The method of claim 1, wherein the method further comprises: The base is further fixed with a guide rod for assisting the positioning of the box body.

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