Clamping, assembling and welding device for front box of bucket rod

Abstract

The utility model relates to the technical field of tools, in particular to a bucket rod front box clamping, assembling and welding device which comprises a bucket rod front section positioning, assembling and welding device and is further provided with a limiting mechanism for positioning a shaft sleeve pin hole, the limiting mechanism comprises a movable plate, and the movable plate is provided with two opposite clamping jaws in a fixed structure mode. The side wall of the sleeve is positioned by arranging the clamping jaws, so that the positioning pin and the pin hole are smoothly inserted and matched, and the insertion accuracy is improved; a positioning pin is arranged in the middle of the upper portions of the two clamping jaws in a fixed structure mode, and a power structure is fixedly arranged on the operation table and connected with the bucket rod front section positioning, assembling and welding device to drive the movable plate to move in a reciprocating mode. The positioning pin is arranged to be matched with the shaft sleeve pin hole in an inserted mode, the shaft sleeve is positioned through the positioning pin, pin hole displacement caused by rotation of the shaft sleeve is prevented, the shaft sleeve with the pin hole can be positioned through one set of device, follow-up fixed trepanning is not needed, the working efficiency is improved, and the installation difficulty is reduced.

Description

Technical fields:

[0001] This application relates to the field of tooling technology, and in particular to a welding device for clamping and assembling the front box of the boom. Background technology:

[0002] The stick is an important component of an excavator, used for bucket operation during digging. The stick is usually composed of the front section of the stick (also called the front stick box), the connecting arm, and the rear section of the stick (also called the rear stick box).

[0003] Our company's utility model patent application with application number 202421901680X—a positioning and welding device for the front section of a boom—includes an operating table. The upper surface of the operating table is fixedly equipped with several support seats, two mounting brackets, and two air shafts. The two air shafts are used to fix bushings. A predetermined number of lever cylinders are fixedly installed along the periphery of the front section of the boom on the upper surface of the operating table to press the front end of the boom against the support seats. The lever cylinder arms are equipped with pressing mechanisms. A rotary pressing cylinder is vertically connected to the mounting brackets in a fixed manner. The lower end of the output arm of the rotary pressing cylinder is fixedly equipped with a positioning post, which has an inverted frustum structure and can press and position the bushings. A telescopic cylinder is fixedly installed on the side wall of one of the mounting brackets in a horizontal manner.

[0004] This patent application can use structures such as air shafts, lever cylinders, and rotary pressing cylinders to fix the bushing and the housing. However, the bushing in the middle has a pin hole. The position of the pin hole is important for the installation of subsequent parts. After the front box of the boom is welded by the positioning and welding device at the front of the boom, other clamping and positioning devices are still needed to open the pin hole of the bushing. The efficiency is low. Due to the shape, the clamping is difficult and affects the accuracy of the pin hole opening. Utility Model Content:

[0005] To solve the above-mentioned technical problems, this utility model provides a clamping and welding device for the front box of the boom. The technical problem it solves is that opening the bushing pin hole on the welded front box is inefficient and difficult. The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0006] A boom front box clamping and welding device includes a boom front section positioning and welding device, characterized in that the boom front section positioning and welding device is provided with a limiting mechanism for positioning the bushing pin hole, the limiting mechanism including:

[0007] The movable plate has two opposing claws arranged in a fixed structure.

[0008] The positioning pin is fixedly positioned in the middle of the upper part of the two jaws.

[0009] The power structure is connected to the positioning and welding device at the front of the boom to drive the moving plate to move back and forth.

[0010] Furthermore, the two jaws have inclined surfaces on their opposite sides, and the two inclined surfaces are arranged in a figure-eight structure.

[0011] Furthermore, a positioning plate is bolted to the inside of the movable plate, and a side baffle and a lower baffle are bolted to the outside of the positioning plate. A pad is provided between the side baffle, the lower baffle and the positioning plate.

[0012] Furthermore, the power structure includes a rectangular frame, on one side of which a cylinder is fixedly mounted, and a push plate is mounted inside the rectangular frame with the cylinder output shaft extending into it. The push plate is fixedly mounted with two parallel push rods, and the other end of each push rod is fixedly connected to a movable plate.

[0013] Furthermore, a guide sleeve is fixedly installed at the end of the rectangular frame away from the cylinder, and the guide sleeve is fitted outside the push rod.

[0014] Furthermore, a limit plate is provided on the side of the guide sleeve away from the rectangular frame through a fixed structure.

[0015] The beneficial effects of this utility model are: by setting a positioning pin to engage with the bushing pin hole, the positioning pin is used to position the bushing and prevent it from rotating and causing the pin hole to shift. A single device can be used to position the bushing with the pin hole already opened, eliminating the need for subsequent fixing and opening of holes, thus improving work efficiency and reducing installation difficulty.

[0016] By setting a chuck to position the sleeve sidewall, the positioning pin and the pin hole can be smoothly inserted and fitted, thus improving the accuracy of the insertion. Attached image description:

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0018] Figure 2 This is a schematic diagram showing the positional relationship between the mounting bracket, the rotary pressing cylinder, the air expansion shaft, and the limiting mechanism of this utility model.

[0019] Figure 3 This is a schematic diagram showing the positional relationship between the limiting mechanism and the air shaft of this utility model.

[0020] Figure 4 This is a schematic diagram of the structure of the limiting mechanism, the air shaft, and the front box of the boom in this utility model.

[0021] Figure 5 This is a three-dimensional structural diagram of the front box of the boom of this utility model.

[0022] Figure 6 This is a three-dimensional structural schematic diagram of an embodiment of the present utility model.

[0023] In the picture:

[0024] 1. Front section positioning and welding device of boom, 2. Moving plate, 3. Claw, 4. Positioning pin, 5. Inclined surface, 6. Positioning plate, 7. Side baffle, 8. Lower baffle, 9. Pad plate, 10. Rectangular frame, 11. Cylinder, 12. Push plate, 13. Push rod, 14. Guide sleeve, 15. Limiting plate. Detailed implementation method:

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the utility model will now be described in further detail with reference to the accompanying drawings and the following embodiments, so that the public can better understand the implementation method of this utility model. The specific implementation scheme of this utility model is as follows:

[0026] A boom front box clamping and welding device includes a boom front section positioning and welding device 1, which is the subject of our company's patent application number 202421901680X. The boom front section positioning and welding device 1 includes an operating platform. The upper surface of the operating platform is fixedly equipped with several support seats, two mounting brackets, and two air shafts. The two air shafts are used to fix bushings. A predetermined number of lever cylinders are fixedly arranged along the periphery of the boom front section on the upper surface of the operating platform to press the front end of the boom onto the support seats. The cylinder arm is equipped with a clamping mechanism; the rotary pressing cylinder is connected to the mounting frame in a fixed manner along the vertical direction; the lower end face of the rotary pressing cylinder output arm is equipped with a positioning post in a fixed manner, the positioning post being a truncated cone structure, which can clamp and position the bushing; one of the mounting frame side walls is equipped with a telescopic cylinder in a fixed manner along the horizontal direction; the upper end face of the operating platform is equipped with a support leg in a fixed manner, the support leg being connected to a guide rod cylinder in a fixed manner, and the output end of the guide rod cylinder is fixedly equipped with a magnet, which cooperates with the telescopic cylinder to position the connecting plate.

[0027] A limiting mechanism for positioning the bushing pin hole is also provided. The limiting mechanism includes a movable plate 2, which has two opposing claws 3 fixedly arranged. The claws position the side wall of the sleeve to ensure smooth insertion and engagement of the positioning pin with the pin hole, improving the accuracy of the insertion. A positioning pin 4 is fixedly arranged in the middle of the upper part of the two claws 3. A power structure is fixedly arranged on the operating table, which is connected to the positioning welding device 1 at the front of the stick to drive the movable plate 2 to move back and forth. By setting the positioning pin 4 to engage with the bushing pin hole, the bushing is positioned to prevent its rotation from causing the pin hole to shift. A single device can complete the positioning of a bushing with a pre-drilled pin hole, eliminating the need for subsequent fixing and drilling, improving work efficiency and reducing installation difficulty.

[0028] It should be noted that the two jaws 3 have inclined surfaces 5 on their opposite sides. The two inclined surfaces 5 are arranged in a figure-eight structure and are symmetrically arranged to facilitate fitting and limiting with the outer wall of the bushing.

[0029] Specifically, a positioning plate 6 is bolted to the inner side of the movable plate 2, and a side baffle 7 and a lower baffle 8 are bolted to the outer side of the positioning plate 6. A pad 9 is provided between the side baffle 7, the lower baffle 8 and the positioning plate 6. By adjusting the pads 9 of different thicknesses, the positioning plate 6 is limited to ensure the accuracy of the positioning pin 4 installation.

[0030] Specifically, the power structure includes a rectangular frame 10 fixedly connected to the operating table. A cylinder 11 is fixedly mounted on one side of the rectangular frame 10. A push plate 12 is mounted inside the rectangular frame 10 with the output shaft of the cylinder 11. Two parallel push rods 13 are fixedly mounted on the push plate 12. The other end of the push rods 13 is fixedly connected to the moving plate 2. The two push rods 13 drive the moving plate to prevent it from deflecting. A guide sleeve 14 is fixedly mounted on the side of the rectangular frame 10 away from the cylinder 11. The guide sleeve 14 is sleeved on the outside of the push rods 13. A limit plate 15 is fixedly mounted on the side of the guide sleeve 14 away from the rectangular frame 10. The above structural design can ensure the stability of the moving plate operation. The two guide sleeves 14 are located on both sides of the air expansion shaft, which is a reasonable layout in the existing congested space and improves the space utilization rate.

[0031] The working principle and process of this utility model are as follows:

[0032] First, the reinforcing plate is placed in the groove using a robotic arm, the lower side plate is placed on the support base, and then the two bushings are placed at the corresponding air expansion shafts. Next, the connecting plate is placed on the upper surface of the lower side plate. The guide rod cylinder, telescopic cylinder, and guide cylinder are activated. The connecting plate is limited by the clamping plate, limit block, and pressing block, as well as the telescopic cylinder and guide rod cylinder.

[0033] Finally, place the upper side plate on the upper part of the connecting plate, start the cylinder 11, and the output shaft of the cylinder 11 pulls the push rod 13 inward through the push plate 12. The push rod 13 pulls the moving plate 2, which drives the pawl 3 and the positioning pin 4 to move towards the bushing until the positioning pin 4 is inserted into the bushing pin hole and the pawl 3 is attached to the outside of the bushing.

[0034] The rotary pressing cylinder is activated, and the positioning pin is inserted into the bushing. The other side's locking block is inserted into the U-shaped slot, pressing the bushing tightly against the air expansion shaft. The air expansion shaft is then activated to fix the bushing. At the same time, the lever cylinder is activated, and the lever cylinder's pressing arm rotates and presses down. When the pin contacts the side plate, the spring is compressed, and the pin slides relative to the pressing arm, thereby applying a clamping force. This completes the positioning and fixing of the front section of the rod, which is then welded using a welding robot.

[0035] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "left," "right," "front," "rear," "lower left," "upper right," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 on the scope of protection of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Although this utility model has been described according to a limited number of embodiments, those skilled in the art should understand from the above description that other embodiments can be conceived within the scope of this utility model described herein.

Claims

1. A stick front box clamping assembly welding device, comprising a stick front section positioning assembly welding device (1), characterized in that, The boom front section positioning and welding device (1) is equipped with a limiting mechanism for positioning the bushing pin hole. The limiting mechanism includes: The movable plate (2) has two opposing claws (3) arranged in a fixed structure. Positioning pin (4) is fixedly set in the middle of the upper part of the two claws (3); The power structure is connected to the positioning and welding device (1) at the front of the boom to drive the moving plate (2) to move back and forth.

2. The stick front box clamping assembly welding device of claim 1, wherein: The two claws (3) have inclined surfaces (5) on their opposite sides, and the two inclined surfaces (5) are arranged in a figure-eight structure.

3. The stick front box clamping assembly welding device of claim 1, wherein: A positioning plate (6) is bolted to the inside of the movable plate (2), and a side baffle (7) and a lower baffle (8) are bolted to the outside of the positioning plate (6). A pad (9) is provided between the side baffle (7), the lower baffle (8) and the positioning plate (6).

4. The stick front box clamping assembly welding device of claim 1, wherein: The power structure includes a rectangular frame (10), a cylinder (11) is fixedly mounted on one side of the rectangular frame (10), a push plate (12) is mounted inside the rectangular frame (10) with the output shaft of the cylinder (11) extending into the rectangular frame (10), and two parallel push rods (13) are fixedly mounted on the push plate (12), with the other end of the push rods (13) fixedly connected to the moving plate (2).

5. The stick front box clamping assembly welding device of claim 1, wherein: A guide sleeve (14) is fixedly installed at the end of the rectangular frame (10) away from the cylinder (11), and the guide sleeve (14) is sleeved on the outside of the push rod (13).

6. The stick front box clamping assembly welding device of claim 1, wherein: A limit plate (15) is provided on the side of the guide sleeve (14) away from the rectangular frame (10) by means of a fixed structure.

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