Excavator lower frame welding positioner

Abstract

The utility model discloses excavator lower frame welding positioner, the cooperation and connection of first swivel seat between both sides have the rotary platform, be provided with second swivel seat on the rotary platform, be provided with fixed base on second swivel seat, the middle part of fixed base is provided with a plurality of support blocks, and the both sides of fixed base are provided with a plurality of support seats, and long slot hole is set up on the support seat, and the fixed setting of support seat has the pressure plate through long slot hole, first fastener, the utility model discloses can realize the full angle of excavator lower frame's turnover, need not manual turnover lower frame, has improved work efficiency, has facilitated the welding of welding personnel to the welding of each position of lower frame, has reduced the labor intensity of welding personnel, has improved the efficiency of welding, and the device still sets up the footboard of the rotary platform through the working platform of one side can lift and further facilitates the welding of welding personnel to the welding of each position of lower frame, has greatly reduced the labor intensity of welding personnel, has better practicality.

Description

Technical Field

[0001] This utility model relates to the field of displacement device technology, specifically to a welding displacement machine for the underframe of an excavator. Background Technology

[0002] An excavator, also known as a digging machine or a soil excavator, is an earthmoving machine that uses a bucket to dig materials above or below the machine's bearing surface and load them into transport vehicles or unload them into a stockpile.

[0003] In the current excavator manufacturing industry, the assembly and welding of the underframe, such as the welding of the underframe track box and the welding of the underframe slewing bearing, is usually done by using ground support to weld the underframe due to its large size. When the inventors used the above method to weld the excavator underframe, they discovered the following defects: Ground support allows welding to be performed on one side and the sides of the underframe. After welding one side, the underframe is flipped over using a crane before welding the other side. This flipping process takes a lot of time and reduces welding efficiency. Furthermore, when welding the sides of the underframe, such as the track boxes on both sides, operators need to squat for extended periods, increasing the workload of technicians and affecting their welding efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a welding positioner for the underframe of an excavator, which addresses the shortcomings of the existing technology and solves at least one of the above-mentioned technical problems.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A welding positioner for an excavator underframe includes two symmetrical uprights. A first sliding block is vertically arranged on each upright, and a first rotating block is arranged on the first sliding block. A rotating platform is connected between the two first rotating blocks. A second rotating block is arranged on the rotating platform, and a fixed seat is arranged on the second rotating block. Several support blocks are arranged in the middle of the fixed seat, and several support seats are arranged on both sides of the fixed seat. Long slots are provided on the support seats, and pressure plates are fixedly arranged on the support seats through the long slots and first fasteners. A pair of symmetrical bushing seats are arranged on both sides of the fixed seat, and a top shaft is slidably connected to the bushing seats. The side of the top shaft... The bushing seat is provided with a mating groove. A second fastener is threadedly connected to the side of the bushing seat. The end of the second fastener mates with the mating groove. A second slide rail is provided on one side of each of the two uprights. A second slide block is slidably connected between the two second slide rails. A pulley is provided at the bottom of the second slide block. The pulley mates with the second slide rail. A third motor is provided on the second slide block. The third motor is slidably connected to the pulley via a chain. A scissor mechanism is provided on the second slide block. A hydraulic cylinder is provided on the second slide block via a rotating shaft. The output end of the hydraulic cylinder is connected to the transmission rod of the scissor mechanism. A working platform is provided at the upper end of the scissor mechanism. Foot pedals are provided on both sides of the rotating platform.

[0006] Furthermore, the inner sides of the stand are provided with first slide rails, and the first slide rails are slidably connected to a first slide block. A lead screw is provided in the middle of the stand through a bearing. The lower end of the lead screw is driven to a reducer. The reducer is driven to a first motor. A ball screw nut is provided in the middle of the first slide block. The ball screw nut is driven to the lead screw. A first rotating seat is provided in the first slide block through a bearing. A second motor is provided on the first slide block. The second motor is driven to the first rotating seat through a worm gear assembly.

[0007] Furthermore, the second rotary table is connected to the middle of the rotating platform via a bearing, and a fourth motor is installed on the second rotary table. The fourth motor is connected to the second rotary table via a worm gear assembly.

[0008] Furthermore, the support block is fixed on the support block seat, which is elongated and one end of the support block seat is movably connected to the fixed seat via a rotating shaft.

[0009] Furthermore, a top block is provided at the end of the top shaft.

[0010] Furthermore, the rotating platform is equipped with guardrails on its sides.

[0011] Furthermore, the guardrail is equipped with a door.

[0012] The beneficial effects of this utility model are: This invention features a lifting and rotating fixed base, enabling the excavator underframe to rotate at all angles without manual operation, thus improving work efficiency and facilitating welding of various parts of the underframe. This reduces the labor intensity of welders and increases welding efficiency. Furthermore, the device further simplifies welding by providing a lifting work platform and a foot pedal for the rotating platform on one side, significantly reducing the labor intensity of welders and demonstrating its practicality. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a schematic diagram of the internal structure of the stand of this utility model.

[0016] Figure 3 This is a schematic diagram of the structure of the fixing base part of this utility model.

[0017] The attached diagram lists the components represented by each number as follows: 1. Stand; 101. First slide rail; 102. First slide block; 103. Lead screw; 104. Reducer; 105. First motor; 106. Second motor; 2. First rotating seat; 3. Rotating platform; 4. Fixed seat; 401. Support block; 402. Support seat; 403. Pressure plate; 404. First fastener; 405. Bushing seat; 408. Top shaft; 406. Mating groove; 407. Second fastener; 5. Second slide rail; 6. Second slide block; 7. Pulley; 8. Third motor; 9. Scissor mechanism; 10. Hydraulic cylinder; 11. Working platform; 12. Guardrail; 13. Door; 14. Foot pedal. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 utility model based on the specific circumstances.

[0024] Example 1: See Figures 1 to 3This is a schematic diagram of the various structures of this utility model, including two symmetrical uprights 1. A first slide 102 is vertically arranged on each upright 1. A first rotating seat 2 is arranged on the first slide 102. Rotation of the first rotating seat 2 drives rotation of a rotating platform 3. A rotating platform 3 is connected between the two first rotating seats 2. A second rotating seat is arranged on the rotating platform 3. A fixed seat 4 is arranged on the second rotating seat. Rotation of the second rotating seat drives rotation of the fixed seat 4. The fixed seat 4 is rectangular, and its width is smaller than the width of the lower frame base to facilitate welding. Several support blocks 401 are arranged in the middle of the fixed seat 4 to support the lower frame base. Several support seats 402 are provided on both sides of the fixed seat 4. The support seats 402 are provided with elongated slots. The support seats 402 are fixed with pressure plates 403 through the elongated slots and first fasteners 404. The pressure plates 403 are used to press and fix the base of the lower frame. A pair of symmetrical bushing seats 405 are provided on both sides of the fixed seat 4. The bushing seats 405 are slidably connected to the top shaft 408. The side of the top shaft 408 is provided with a mating groove 406. The side of the bushing seat 405 is threadedly connected to the second fastener 407. The end of the second fastener 407 is correspondingly engaged with the mating groove 406. The top shaft 408 can move and engage with the track boxes on both sides of the lower frame. The track box is supported, and the top shaft 408 can be fixed to the bushing by the second fastener 407. A second slide rail 5 is provided on one side of each of the two uprights 1. A second slide block 6 is slidably connected between the two second slide rails 5. A pulley 7 is provided at the bottom of the second slide block 6, and the pulley 7 cooperates with the second slide rail 5. A third motor 8 is provided on the second slide block 6, and the third motor 8 is slidably connected to the pulley 7 via a chain. The third motor 8 drives the pulley 7 to move on the slide rail, thereby moving the second slide block 6. A scissor mechanism 9 is provided on the second slide block 6, and a hydraulic cylinder 10 is provided on the second slide block 6 via a rotating shaft. The output end of the hydraulic cylinder 10 is connected to the scissor mechanism. The transmission rod is connected, and the upper end of the scissor mechanism 9 is equipped with a working platform 11. The scissor mechanism 9 is a mechanical device that achieves vertical lifting based on a parallelogram structure with staggered hinges. Its core principle is to control the height of the platform by changing the included angle of multiple sets of cross arms (in an "X" shape) made of high-strength steel. Specifically, when the hydraulic cylinder 10 pushes the scissor arm to unfold, the cross angle of the arm increases, and the working platform 11 rises smoothly; conversely, when the cylinder retracts, the arm folds, and the working platform 11 descends slowly. Foot pedals 14 are provided on both sides of the rotating platform 3 to facilitate welding personnel to obtain support for easier welding of the lower frame.

[0025] Specifically, the inner sides of the support 1 are provided with first slide rails 101, and the first slide rails 101 are slidably connected to the first slide block 102. The middle of the support 1 is provided with a lead screw 103 through a bearing. The lower end of the lead screw 103 is connected to the reducer 104. The reducer 104 is connected to the first motor 105. The middle of the first slide block 102 is provided with a ball screw nut, which is connected to the lead screw 103. The first motor 105 drives the first slide block 102 to move up and down. The first slide block 102 is provided with a first rotating block 2 through a bearing. The first slide block 102 is provided with a second motor 106. The second motor 106 is connected to the first rotating block 2 through a worm gear assembly. The second motor 106 drives the first rotating block 2 to rotate through the worm gear assembly. The worm gear assembly has a good self-locking function. The second motor 106 drives the worm to rotate, and the worm drives the worm wheel to rotate. The worm wheel is fixedly connected to the first rotating block 2.

[0026] Specifically, the second rotary table is connected to the middle of the rotating platform 3 via a bearing. A fourth motor is installed on the second rotary table. The fourth motor is connected to the second rotary table via a worm gear assembly. The fourth motor drives the second rotary table to rotate via the worm gear assembly. The worm gear assembly has a good self-locking function. The fourth motor drives the worm to rotate, and the worm drives the worm wheel to rotate. The worm wheel is fixedly connected to the second rotary table.

[0027] Specifically, the support block 401 is fixed on the support block 401 base, which is long and narrow. One end of the support block 401 base is movably connected to the fixed base 4 via a pivot. The position of the support block 401 can be moved so that the operator can find a better fulcrum.

[0028] Specifically, a top block is provided at the end of the top shaft 408 to improve the stability of the support.

[0029] Specifically, the rotating platform 3 is equipped with guardrails 12 on its side to improve safety.

[0030] Specifically, the guardrail 12 is equipped with a door 13 to facilitate the passage of operators.

[0031] Each electrical appliance in this device is electrically connected to the control computer, and the operator controls the start and stop of each motor through the control computer.

[0032] The principle of this utility model: The first motor 105 lowers the rotating platform 3, and the base of the underframe is fixed to the fixed seat 4 by the cooperation of the pressure plate 403 and the support block 401. The operator pre-welds the track boxes on both sides to the base of the underframe and fixes them with the track boxes on both sides by the top shaft 408. The slewing support is pre-welded to the base of the underframe. During welding, the first motor 105 drives the rotating platform 3 to a suitable height, the second motor 106 drives the underframe to rotate to a suitable angle, and the fourth motor drives the fixed seat 4 to rotate. The operator stands on the working platform 11, the third motor 8 drives the working platform 11 to move, and the hydraulic cylinder 10 drives the working platform 11 to rise and fall. The operator can find the most suitable angle for welding the underframe. When the rotating platform 3 is horizontal, the operator can also stand on the foot pedal 14 to weld the underframe, which makes it convenient for the operator to weld the underframe.

[0033] This utility model, by providing a fixed base 4 that can be raised, lowered, and flipped, enables the excavator underframe to rotate at all angles, eliminating the need for manual rotation of the underframe, thus improving work efficiency. It also facilitates welding of various positions on the underframe by welders, reducing their labor intensity and increasing welding efficiency. Furthermore, by providing a work platform 11 that can be raised and lowered on one side and a foot pedal 14 for the rotating platform 3, this device further facilitates welding of various positions on the underframe by welders, greatly reducing their labor intensity and demonstrating good practicality.

[0034] The above are merely optional embodiments of this utility model and are not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0035] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

Claims

1. A welding positioner for an excavator underframe, characterized in that: The system includes two symmetrical uprights (1), each upright (1) having a first slide (102) vertically arranged on the first slide (102), a first rotating seat (2) arranged on the first slide (102), a rotating platform (3) connecting the two first rotating seats (2), a second rotating seat arranged on the rotating platform (3), a fixed seat (4) arranged on the second rotating seat, a plurality of support blocks (401) arranged in the middle of the fixed seat (4), a plurality of support seats (402) arranged on both sides of the fixed seat (4), a long slot hole arranged on the support seat (402), a pressure plate (403) fixedly arranged on the support seat (402) through the long slot hole and a first fastener (404), a pair of mutually symmetrical bushing seats (405) arranged on both sides of the fixed seat (4), a top shaft (408) slidably connected to the bushing seat (405), a mating groove (406) arranged on the side of the top shaft (408), and the bushing seat (405) slidably connected to the top shaft (408). 5) The side is connected to a second fastener (407) by a thread. The end of the second fastener (407) is correspondingly engaged with the mating groove (406). A second slide rail (5) is provided on one side of each of the two uprights (1). A second slide block (6) is slidably connected between the two second slide rails (5). A pulley (7) is provided at the bottom of the second slide block (6). The pulley (7) is engaged with the second slide rail (5). A third motor (8) is provided on the second slide block (6). The third motor (8) is slidably connected to the pulley (7) by a chain. A scissor mechanism (9) is provided on the second slide block (6). A hydraulic cylinder (10) is provided on the second slide block (6) by a rotating shaft. The output end of the hydraulic cylinder (10) is connected to the transmission rod of the scissor mechanism (9). A working platform (11) is provided at the upper end of the scissor mechanism (9). Foot pedals (14) are provided on both sides of the rotating platform (3).

2. The excavator underframe welding positioner according to claim 1, characterized in that: The inner sides of the support (1) are provided with first slide rails (101), and the first slide rails (101) are slidably connected to the first slide block (102). The middle part of the support (1) is provided with a lead screw (103) through a bearing. The lower end of the lead screw (103) is connected to a reducer (104) for transmission. The reducer (104) is connected to a first motor (105) for transmission. The middle part of the first slide block (102) is provided with a ball screw nut, and the ball screw nut is connected to the lead screw (103) for transmission. The first slide block (102) is provided with a first rotating seat (2) through a bearing. The first slide block (102) is provided with a second motor (106), and the second motor (106) is connected to the first rotating seat (2) for transmission through a worm gear assembly.

3. The excavator underframe welding positioner according to claim 1, characterized in that: The second rotary table is connected to the middle of the rotating platform (3) via a bearing. A fourth motor is provided on the second rotary table, and the fourth motor is connected to the second rotary table via a worm gear assembly.

4. The excavator underframe welding positioner according to claim 1, characterized in that: The support block (401) is fixed on the support block (401) seat. The support block (401) seat is long and narrow. One end of the support block (401) seat is movably connected to the fixed seat (4) through a rotating shaft.

5. The excavator underframe welding positioner according to claim 1, characterized in that: The top shaft (408) is provided with a top block at its end.

6. The excavator underframe welding positioner according to claim 1, characterized in that: The rotating platform (3) is provided with a guardrail (12) on its side.

7. The excavator underframe welding positioner according to claim 6, characterized in that: The guardrail (12) is equipped with a door (13).

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