Special grabbing and welding tool for loader bucket rod box

Abstract

The invention discloses a special grabbing and welding tool for a loader bucket rod box, and relates to the technical field of engineering machinery manufacturing, the special grabbing and welding tool comprises a welding tool platform, a welding mechanical arm and a grabbing mechanism, the welding mechanical arm is fixedly mounted on the upper surface of the rear end of the welding tool platform, and the grabbing mechanism is arranged on the upper surface of the welding tool platform; the grabbing mechanism comprises two transverse vertical plates fixedly connected to the upper surface of the welding tool platform, an air inflation pipe is fixedly connected between the two transverse vertical plates, an air pump is fixedly connected to the side face of the welding tool platform, the air conveying end of the air pump communicates with the air inflation pipe, the surface of the air inflation pipe communicates with a plurality of air inflation bags, and the air inflation bags communicate with the air inflation pipes. The multiple inflation bags are divided into two sets, the ends, close to each other, of the two sets of inflation bags are fixedly connected with grabbing seats, telescopic supporting rods are fixedly connected between the inflation pipes and the grabbing seats, and therefore the problem that grabbing is not stable due to the fact that the sizes are not matched when a grabbing welding tool is used for fixing is solved.

Description

Technical Field

[0001] The invention relates to the technical field of engineering machinery manufacturing, and more specifically to a special tool for grab welding of a bucket box of a loader. Background Art

[0002] The arm is a working device of the loader, usually called the big arm or small arm. It is connected to the frame of the loader, and the arm is longer, so it is commonly called the big arm, and its technical name is the boom; while the arm connected to the bucket is smaller, so it is commonly called the small arm, and its technical name is the arm.

[0003] The front section of the boom is equipped with a front support connected to the bucket or attachment, an upper support connected to the bucket cylinder is arranged on the top, and the rear section is provided with a tail support connected to the boom cylinder and a rear support hinged to the boom, i.e., the boom box.

[0004] During the welding operation of the boom box, it is necessary to use a grab welding fixture to fix the boom box to ensure that the boom box can remain stable during welding by the welding robot arm, so as to avoid shaking caused by the contact of the welding robot arm during welding, which will interfere with the accuracy of the welding process and reduce the welding quality. The boom box is an irregular shape, and there are different size specifications for different models of loaders. Therefore, when using the grab welding fixture for fixing, the size mismatch will lead to unstable grip, which will affect the accuracy of welding and cause a decline in welding quality. Summary of the invention

[0005] In view of the problems existing in the prior art, the purpose of the present invention is to provide a special grab welding tool for a loader boom box, so as to solve the problem of unstable gripping caused by size mismatch when using the grab welding tool for fixing.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] A special tool for grasping welding for a loader boom box comprises a welding tool platform and a welding robot arm, wherein the welding robot arm is fixedly mounted on the rear end upper surface of the welding tool platform, and a gripping mechanism is arranged on the upper surface of the welding tool platform, wherein the gripping mechanism comprises two transverse vertical plates fixedly connected to the upper surface of the welding tool platform, an inflation tube is fixedly connected between the two transverse vertical plates, an air pump is fixedly connected to the side of the welding tool platform, an air delivery end of the air pump is connected to the inflation tube, a plurality of inflation bags are connected to the surface of the inflation tube, the plurality of inflation bags are divided into two groups, the ends of the two groups of inflation bags close to each other are fixedly connected to a gripping seat, and a telescopic support rod is fixedly connected between the inflation tube and the gripping seat.

[0008] Furthermore, a return spring is fixedly connected between the inflation tube and the gripping seat, and the return spring is located inside the inflation bag.

[0009] Furthermore, the end of the inflation tube away from the air pump is connected to an exhaust pipe, a return spring is fixedly connected to the inside of the exhaust pipe, a blocking ball is fixedly connected to the end of the return spring away from the inflation tube, and a rubber blocking ring is fixedly connected to the inside of the exhaust pipe.

[0010] Furthermore, a retaining ring is fixedly connected inside the outlet of the exhaust pipe.

[0011] Furthermore, a positioning mechanism is provided on the lower surface of the welding tooling platform, and the positioning mechanism includes a support frame fixedly connected to the lower surface of the welding tooling platform, a slide groove is provided on the surface of the welding tooling platform, a guide frame is fixedly connected to the inside of the slide groove, the cross-sectional shape of the slide groove and the guide frame are both "Y"-shaped, and moving blocks are slidably sleeved on the three arm ends of the guide frame, and the upper surfaces of the three moving blocks are fixedly connected to positioning columns.

[0012] Furthermore, a first motor is fixedly connected to the lower surface of the support frame, and a rotating shaft is rotatably connected to the inner wall in the middle of the support frame. The rotating shaft is fixedly connected to the output shaft of the first motor, and three pull rods are fixedly connected to the surface of the rotating shaft. The ends of the three pull rods away from each other are fixedly connected to pull ropes, and the upper ends of the three pull ropes are respectively fixedly connected to the surfaces of the three moving blocks.

[0013] Furthermore, a feeding mechanism is provided on a side of the welding tooling platform, and the feeding mechanism comprises a stand fixedly connected to the side of the welding tooling platform, and a plurality of rollers are rotatably connected inside the upper end of the stand.

[0014] Furthermore, guide plates are fixedly connected on both sides of the frame near one end of the welding tooling platform, four supporting poles are fixedly connected to the surface of the frame, two of the four supporting poles are grouped together, the upper ends of two of the supporting poles are rotatably connected to transmission shafts, the two transmission shafts are connected through multiple transmission belts, and push plates are fixedly connected to both ends of the transmission belts.

[0015] Furthermore, the two push plates are respectively located on the upper and lower surfaces of both ends of the transmission belt.

[0016] Furthermore, a second motor is fixedly connected to the upper end of one of the support poles, and an output shaft of the second motor is fixedly connected to one end of a corresponding one of the transmission shafts.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) This solution uses an air pump to introduce air into the inflation pipeline, and the air expands the inflation bag, so that multiple independent gripping seats are attached to the side surface of the boom box, thereby achieving stable gripping and fixation of the box. Since the gripping seats have the ability to independently move, they can flexibly cope with boom boxes of irregular shapes and different sizes. Therefore, it is possible to grip and fix boom boxes of irregular shapes and different sizes, thereby improving the accuracy and quality of welding.

[0019] (2) This solution aligns the triangular connecting hole on the boom box and sleeves it on the three positioning columns, and makes each positioning column rest against the three vertices of the triangular connecting hole, effectively limiting the spatial position of the boom box, thereby preventing deflection caused by the difference in the contact sequence between the gripping seat and the boom box during subsequent gripping operations, further improving the accuracy of the welding operation and ensuring the stability of the welding process.

[0020] (3) This solution uses a push plate to push the boom box to move, and uses two guide plates to guide and correct the moving posture of the boom box, so that the boom box can be accurately moved between the two horizontal vertical plates, avoiding the boom box from being tilted when moving to the welding tooling platform, which requires workers to make large adjustments. In addition, because the boom box is heavy, through pre-preparation, the boom box to be welded can be immediately transported to the welding tooling platform after the welding of one boom box is completed, which can realize rapid loading of the welding process without the need for workers to move materials immediately after welding is completed, thereby increasing the time gap for material transportation and reducing the time consumed by continuous welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the bucket box of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the inflation tube part of the present invention;

[0024] Figure 4 It is a schematic diagram of the structure inside the inflatable bag of the present invention;

[0025] Figure 5 It is a schematic diagram of the structure inside the exhaust pipe of the present invention;

[0026] Figure 6 It is a structural schematic diagram of the welding tool platform part of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the chute part of the present invention;

[0028] Figure 8It is a structural schematic diagram of the positioning mechanism of the present invention;

[0029] Fig. 9 It is a structural schematic diagram of the stand part of the present invention;

[0030] Fig.10 It is a schematic structural diagram of the transmission belt and the transmission shaft of the present invention.

[0031] Description of the numbers in the figure:

[0032] 1. Welding tooling platform; 2. Welding robot arm; 301. Horizontal vertical plate; 302. Inflatable tube; 303. Inflatable bag; 304. Air pump; 305. Gripping seat; 306. Telescopic support rod; 307. Return spring; 308. Exhaust pipe; 309. Reset spring; 310. Blocking ball; 311. Rubber blocking ring; 312. Retaining ring; 401. Positioning column; 402. Slide; 403. Support frame; 404. First motor; 405. Moving block; 406. Guide frame; 407. Pull rope; 408. Rotating shaft; 409. Pull rod; 501. Vertical frame; 502. Roller; 503. Transmission belt; 504. Guide plate; 505. Push plate; 506. Support vertical rod; 507. Transmission shaft; 508. Second motor. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-Figure 5A special welding tool for a bucket box of a loader, comprising a welding tool platform 1 and a welding mechanical arm 2, wherein the welding mechanical arm 2 is fixedly mounted on the upper surface of the rear end of the welding tool platform 1, and a gripping mechanism, wherein the gripping mechanism is arranged on the upper surface of the welding tool platform 1, and the gripping mechanism comprises two transverse vertical plates 301 fixedly connected to the upper surface of the welding tool platform 1, an inflatable tube 302 is fixedly connected between the two transverse vertical plates 301, and an air pump 304 is fixedly connected to the side of the welding tool platform 1, and the air pump 304 can inject air into the inflatable tube In the tube 302, the air is used to inflate the inflatable bag 303, and the air supply end of the air pump 304 is connected to the inflatable tube 302. The surface of the inflatable tube 302 is connected with multiple inflatable bags 303. The air is used to inflate the inflatable bags 303, which can push multiple gripping seats 305 against the side of the boom box. The multiple inflatable bags 303 are divided into two groups. The ends of the two groups of inflatable bags 303 that are close to each other are fixedly connected with gripping seats 305. The multiple gripping seats 305 are pushed against the side of the boom box to grip and fix the boom box.

[0035] Among them, a telescopic support rod 306 is fixedly connected between the inflation tube 302 and the gripping seat 305. The telescopic support rod 306 can play a role of lateral support, so that the gripping seat 305 can only move longitudinally, thereby achieving a better gripping effect. A return spring 307 is fixedly connected between the inflation tube 302 and the gripping seat 305. The return spring 307 can drive the gripping seat 305 to return to its original position after the air in the inflation bag 303 is discharged, and prevent the gripping seat 305 from swinging and affecting the shaking of the next boom box. The return spring 307 is located inside the inflation bag 303.

[0036] Among them, the end of the inflation tube 302 away from the air pump 304 is connected to the exhaust pipe 308, and the exhaust pipe 308 is fixedly connected with a return spring 309 inside. When the air pressure is not high, the return spring 309 can drive the blocking ball 310 to block the rubber blocking ring 311 to prevent air from being discharged. The end of the return spring 309 away from the inflation tube 302 is fixedly connected with the blocking ball 310, and the exhaust pipe 308 is fixedly connected with a rubber blocking ring 311. The exhaust pipe 308 has a retaining ring 312 fixedly connected at the outlet. The retaining ring 312 can prevent the blocking ball 310 from detaching from the exhaust pipe 308 and affecting the subsequent return of the blocking ball 310 to its original position without affecting the outflow of air.

[0037] By adopting the above technical solution, when the boom box is welded, the boom box is set between the two horizontal vertical plates 301 on the welding tooling platform 1, and then air is injected into the inflation tube 302 through the air pump 304. The air is used to inflate the inflation bag 303, which can push multiple gripping seats 305 against the side of the boom box to grip and fix the boom box. The multiple gripping seats 305 can move independently, so that irregularly shaped and different sized boom boxes can be gripped and fixed, thereby improving the welding accuracy and welding quality.

[0038] When excessive air is injected into the inflation tube 302, the excessive air pressure in the inflation tube 302 may cause the inflation bag 303 to rupture. Therefore, when the air pressure in the inflation tube 302 is too high, the air pressure inside the inflation tube 302 will push the blocking ball 310 to move toward the direction close to the retaining ring 312. Since the diameter of the blocking ball 310 is smaller than the inner ring diameter of the exhaust pipe 308 and larger than the inner ring diameter of the blocking rubber ring, the air can be discharged from the exhaust pipe 308 at this time, thereby reducing the pressure inside the inflation tube 302 and reducing the risk of the inflation bag 303 rupturing due to excessive air pressure.

[0039] like Figure 6-Figure 8 As shown, a positioning mechanism is arranged on the lower surface of the welding tooling platform 1, and the positioning mechanism includes a support frame 403 fixedly connected to the lower surface of the welding tooling platform 1, and a slide groove 402 is opened on the surface of the welding tooling platform 1, and a guide frame 406 is fixedly connected to the interior of the slide groove 402, and the cross-sectional shape of the slide groove 402 and the guide frame 406 are both "Y"-shaped, and the three arm ends of the guide frame 406 are slidably sleeved with moving blocks 405, and the upper surfaces of the three moving blocks 405 are fixedly connected with positioning columns 401, and the three positioning columns 401 are respectively abutted at the three corners of the triangular connecting hole, so that the position of the boom box can be restricted by the three positioning columns 401.

[0040] Among them, the lower surface of the support frame 403 is fixedly connected with the first motor 404, and the pull rope 407 can be driven by the first motor 404 to pull the three positioning columns 401. The inner wall of the middle part of the support frame 403 is rotatably connected with a rotating shaft 408, and the rotating shaft 408 is fixedly connected to the output shaft of the first motor 404. Three pull rods 409 are fixedly connected to the surface of the rotating shaft 408. The ends of the three pull rods 409 away from each other are fixedly connected with the pull rope 407. The pull rope 407 pulls the three positioning columns 401, so that the three positioning columns 401 are respectively against the three corners of the triangular connecting hole, and the upper ends of the three pull ropes 407 are respectively fixedly connected to the surfaces of the three moving blocks 405.

[0041] By adopting the above-mentioned technical solution, when the boom box is set on the welding tooling platform 1, the triangular connecting hole on the boom box is sleeved on the positioning column 401, and then the pull rod 409 is driven to rotate by the first motor 404, and then the pull rope 407 is pulled, so that the three moving blocks 405 can be synchronously moved in the direction away from each other until the three positioning columns 401 are respectively against the three corners of the triangular connecting hole. The position of the boom box can be restricted by the three positioning columns 401 to avoid the boom box being tilted due to the different order in which the gripping seat 305 contacts the boom box when the boom box is gripped later, thereby improving the welding accuracy and welding quality.

[0042] like Fig. 9 and Fig.10 As shown, a loading mechanism is arranged on the side of the welding tooling platform 1, and the loading mechanism includes a stand 501 fixedly connected to the side of the welding tooling platform 1, and a plurality of rollers 502 are rotatably connected inside the upper end of the stand 501, and guide plates 504 are fixedly connected on both sides of the stand 501 close to one end of the welding tooling platform 1, and the moving posture of the boom box can be guided and corrected by the guide plates 504, so that the boom box can be moved between the two horizontal stands 301.

[0043] Among them, four supporting uprights 506 are fixedly connected to the surface of the frame 501, and the four supporting uprights 506 are grouped in pairs. The upper ends of two of the supporting uprights 506 are rotatably connected with a transmission shaft 507, and the two transmission shafts 507 are transmission-connected through multiple transmission belts 503. Both ends of the transmission belt 503 are fixedly connected with a push plate 505, and the push plate 505 can push the boom box to move toward the welding tooling platform 1. The two push plates 505 are respectively located on the upper and lower surfaces of both ends of the transmission belt 503. The upper end of one of the supporting uprights 506 is fixedly connected with a second motor 508, and the output shaft of the second motor 508 is fixedly connected to one end of a corresponding transmission shaft 507. The second motor 508 drives the transmission shaft 507 to rotate, and through the cooperation of the transmission belt 503, the push plate 505 located below the transmission belt 503 can be moved.

[0044] By adopting the above technical solution, when welding a boom box, another boom box to be welded is placed on the stand 501, and the boom box is pushed to the bottom of the transmission belt 503. After the boom box is welded, the second motor 508 drives the transmission shaft 507 to rotate and makes the transmission belt 503 run, so that the push plate 505 located under the transmission belt 503 pushes the boom box to move toward the welding tooling platform 1, and guides and corrects the moving posture of the boom box through two right-end inclined guide plates 504, so that the boom box can be accurately moved between the two horizontal vertical plates 301, avoiding the boom box from being skewed when moving to the welding tooling platform 1 and requiring the staff to make large adjustments. Moreover, because the boom box is heavy, through pre-preparation, the boom box to be welded can be immediately transported to the welding tooling platform 1 after the welding of one boom box is completed, so that the welding process can be quickly loaded without the need for the staff to immediately carry out material handling after the welding is completed, which increases the time gap for material handling and reduces the time consumed by continuous welding.

[0045] Usage: When welding one boom box, place another boom box to be welded on the stand 501 , and push the boom box to be welded under the transmission belt 503 .

[0046] The boom box is set on the welding tooling platform 1, and the triangular connecting hole on the boom box is sleeved on the positioning column 401. The first motor 404 drives the pull rod 409 to rotate and pull the pull rope 407, so that the three positioning columns 401 are respectively against the three corners of the triangular connecting hole.

[0047] Then, air is injected into the inflation tube 302 through the air pump 304 to expand the inflation bag 303, pushing the gripping seat 305 against the side of the boom box to grip and fix the boom box.

[0048] After the boom box is welded, the second motor 508 drives the transmission shaft 507 to rotate and the transmission belt 503 to run, so that the push plate 505 located under the transmission belt 503 pushes the boom box to move to the welding tooling platform 1, and moves the boom box between the two horizontal vertical plates 301. Then the staff lifts one end of the triangular connecting hole of the boom box, and slightly drags the boom box so that the triangular connecting hole is placed on the three positioning columns 401, and prepares for the welding of the next boom box.

[0049] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A special welding tool for a bucket box of a loader, comprising a welding tool platform (1) and a welding mechanical arm (2), wherein the welding mechanical arm (2) is fixedly mounted on the upper surface of the rear end of the welding tool platform (1), and is characterized in that: A gripping mechanism, wherein the gripping mechanism is arranged on the upper surface of the welding tooling platform (1), and the gripping mechanism comprises two horizontal vertical plates (301) fixedly connected to the upper surface of the welding tooling platform (1), an inflation tube (302) fixedly connected between the two horizontal vertical plates (301), an air pump (304) fixedly connected to the side of the welding tooling platform (1), an air delivery end of the air pump (304) is connected to the inflation tube (302), a surface of the inflation tube (302) is connected to a plurality of inflation bags (303), the plurality of inflation bags (303) are divided into two groups, the ends of the two groups of inflation bags (303) close to each other are fixedly connected to a gripping seat (305), and a telescopic support rod (306) is fixedly connected between the inflation tube (302) and the gripping seat (305).

2. The special tooling for grab welding of a bucket box of a loader according to claim 1, characterized in that: A return spring (307) is fixedly connected between the inflation tube (302) and the gripping seat (305), and the return spring (307) is located inside the inflation bag (303).

3. The special tooling for grab welding of bucket box of loader according to claim 1, characterized in that: One end of the inflation tube (302) away from the air pump (304) is connected to an exhaust tube (308), a return spring (309) is fixedly connected inside the exhaust tube (308), one end of the return spring (309) away from the inflation tube (302) is fixedly connected to a blocking ball (310), and a rubber blocking ring (311) is fixedly connected inside the exhaust tube (308).

4. The special tooling for grab welding of a bucket box of a loader according to claim 3, characterized in that: A retaining ring (312) is fixedly connected inside the outlet of the exhaust pipe (308).

5. The special tooling for grab welding of bucket box of loader according to claim 1, characterized in that: A positioning mechanism is provided on the lower surface of a welding tooling platform (1), and the positioning mechanism comprises a support frame (403) fixedly connected to the lower surface of the welding tooling platform (1); a slide groove (402) is provided on the surface of the welding tooling platform (1); a guide frame (406) is fixedly connected inside the slide groove (402); the cross-sectional shapes of the slide groove (402) and the guide frame (406) are both "Y"-shaped; three arm ends of the guide frame (406) are slidably sleeved with moving blocks (405); and the upper surfaces of the three moving blocks (405) are fixedly connected with positioning columns (401).

6. The special tooling for grab welding of a bucket box of a loader according to claim 5, characterized in that: The lower surface of the support frame (403) is fixedly connected to the first motor (404), and the inner wall in the middle of the support frame (403) is rotatably connected to a rotating shaft (408), and the rotating shaft (408) is fixedly connected to the output shaft of the first motor (404). The surface of the rotating shaft (408) is fixedly connected to three pull rods (409), and the ends of the three pull rods (409) that are away from each other are fixedly connected to pull ropes (407), and the upper ends of the three pull ropes (407) are respectively fixedly connected to the surfaces of the three moving blocks (405).

7. The special tooling for grab welding of a bucket box of a loader according to claim 1, characterized in that: A loading mechanism is arranged on the side of the welding tooling platform (1), and comprises a stand (501) fixedly connected to the side of the welding tooling platform (1), wherein a plurality of rollers (502) are rotatably connected inside the upper end of the stand (501).

8. The special tooling for grab welding of a bucket box of a loader according to claim 7, characterized in that: Guide plates (504) are fixedly connected to both sides of the stand (501) at one end close to the welding tooling platform (1); four support poles (506) are fixedly connected to the surface of the stand (501); the four support poles (506) are grouped in pairs; the upper ends of two support poles (506) are rotatably connected to transmission shafts (507); the two transmission shafts (507) are connected in transmission via a plurality of transmission belts (503); and push plates (505) are fixedly connected to both ends of the transmission belts (503).

9. The special tooling for grab welding of a bucket box of a loader according to claim 8, characterized in that: The two push plates (505) are respectively located on the upper and lower surfaces of both ends of the transmission belt (503).

10. The special tooling for grab welding of a bucket box of a loader according to claim 8, characterized in that: A second motor (508) is fixedly connected to the upper end of one of the supporting uprights (506), and an output shaft of the second motor (508) is fixedly connected to one end of a corresponding transmission shaft (507).

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