Train framework welding bridge type workstation

Abstract

The utility model relates to the technical field of train body welding of rail transit, in particular to a train framework welding bridge type workstation which comprises a bridge type portal frame, a driving base, a supporting guide rail, a toothed plate and a gear transmission mechanism, the lower portion of the bridge type portal frame is connected with the driving base, and the lower portion of the driving base is connected with the supporting guide rail. The supporting guide rails are symmetrically arranged front and back relative to the center line of the bridge type portal frame, toothed plates are fixed in the supporting guide rails, the surfaces of the toothed plates are meshed with gear transmission mechanisms, the gear transmission mechanisms are installed below the driving base, and a motor driving mechanism is installed above the driving base; the motor driving mechanisms and the driving bases are arranged in a one-to-one correspondence mode. According to the train framework welding bridge type workstation, the gear protection mechanism is arranged to shield and protect the opening above the toothed plate, so that scraps or external impurities generated during machining are prevented from falling into the meshing position of the toothed plate and the gear transmission mechanism, and the stable movement of the follow-up driving base is not influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of car body welding of rail transportation, in particular to a bridge-type workstation for welding a train frame. Background Art

[0002] When welding rail transit car bodies, a bridge-type workstation is generally used to move outside the car body and adjust the processing position, so that the processing of longer car bodies can be achieved. For example, a bridge-type hanging robot arc welding workstation with application number CN202021655811.2 disclosed on January 1, 2021 controls the motor through PLC, so that the gantry can stay at any position of the stroke with an accuracy of 0.05mm. When the robot obtains the position of the weld and its own position through PLC, it runs a specific program to complete the welding, which can accurately complete the welding of extra-long parts in one time and ensure millimeter-level accuracy. The loading can be done by a crane, and after positioning by a fixture, the welding can be completed at a speed of 10mm / s, reducing the workload of workers.

[0003] The installation of the bridge workstation is on both sides of the guide rails, and the motor is used to synchronize the gear rack meshing on the two guide rails. The drive is generally completed by a single motor drive. Because the span of the workstation is very wide, the single side of the motor reducer will be subjected to a relatively large torque. In the later stage, it is easy to cause the gear rack to be inaccurate due to the single-sided drive, which is easy to get stuck and cause the final robot trajectory to deviate. Some of them adopt a dual-motor structure. When in use, the rack gear is directly exposed to the outside, which is easy to be contaminated or enter particulate impurities, causing the workstation to move bumpy or vibrate, thereby affecting the subsequent operation stability of the workstation. Utility Model Content

[0004] The purpose of the utility model is to provide a bridge-type workstation for welding a train frame, so as to solve the problem that the bridge-type workstation proposed in the above-mentioned background technology is installed with guide rails on both sides, and a motor is used to synchronously engage rack and gear on the two guide rails, and the drive is generally completed by a single motor drive. Because the span of the workstation is very wide, one side of the motor reducer will be subjected to a relatively large torque, and it is easy to appear that the gear and rack are not accurately engaged due to the one-sided drive in the later stage, and it is easy to get stuck, resulting in deviations in the final robot trajectory. Some of them adopt a dual-motor structure, and their rack and gear are directly exposed to the outside when in use, which is easy to be contaminated or enter particulate impurities in the future, resulting in bumps or vibrations when the workstation moves.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a train skeleton welding bridge workstation, comprising a bridge gantry, a driving base, a supporting guide rail, a tooth plate and a gear transmission mechanism, wherein the driving base is connected to the bottom of the bridge gantry, and the supporting guide rail is connected to the bottom of the driving base, and the supporting guide rail is symmetrically arranged front and back about the center line of the bridge gantry, a tooth plate is fixed inside the supporting guide rail, and a gear transmission mechanism is meshed on the surface of the tooth plate, the gear transmission mechanism is installed below the driving base, a motor driving mechanism is installed above the driving base, and the motor driving mechanism and the driving base are arranged one by one, so that two groups of driving bases can be driven synchronously and stably, a horizontal sliding structure is formed between the driving base and the supporting guide rail, and a gear protection mechanism is arranged above the supporting guide rail, and the gear protection mechanism is respectively located on the left and right sides of the driving base to protect the meshing position of the gear transmission mechanism and the tooth plate, and the gear protection mechanism can automatically adjust its position with the movement of the driving base.

[0006] To further optimize the technical solution, auxiliary wheels are rotatably installed below the driving base, and the auxiliary wheels assist the driving base in sliding on the supporting guide rails.

[0007] To further optimize the technical solution, a braking mechanism is provided at the right end of the support guide rail to limit the maximum stroke of the driving base and detect the moving distance of the driving base.

[0008] Further optimizing the technical solution, the braking mechanism includes a buffer, a mounting plate, a brake plate, a stroke sensing plate, and an over-travel sensor;

[0009] A buffer is arranged at the right end of the support rail;

[0010] A mounting plate is arranged on the right side of the buffer to provide mounting support for the buffer, and the mounting plate is fixed to the right end of the supporting guide rail;

[0011] Brake plate, which secures the right side of the driving base;

[0012] A travel sensing plate is installed under the driving base to monitor the travel of the driving base;

[0013] The overtravel sensor is installed on the right side of the support rail, and the overtravel sensor is located on the left side of the buffer.

[0014] To further optimize the technical solution, the gear protection mechanism includes a protection belt, a reel, a torsion spring and a traction plate;

[0015] A protective strip is arranged above the support rail to cover the opening of the support rail;

[0016] A reel is rotatably mounted on the end of the support rail, and the end of the protective belt is wound around the surface of the reel;

[0017] The torsion spring is installed at the end of the reel to provide a rotational reset force for the reel so that the reel can reel the protective tape;

[0018] The traction plate is fixed at the end of the protection belt, and a left-right sliding structure is formed between the traction plate and the supporting guide rail. The traction plate is connected to the driving base and moves with the movement of the driving base.

[0019] To further optimize the technical solution, the traction plate and the driving base are detachably connected, and the tooth plate can be released by releasing the connection between the traction plate and the driving base.

[0020] To further optimize the technical solution, an "L"-shaped docking block is fixed above the traction plate, and a locking groove is provided in the middle of the docking block, a docking groove is provided on the side of the driving base, and a concave-convex matching structure is formed between the docking groove and the docking block, a limit block is provided above the docking groove, and the outer side of the limit block is designed with an inclined structure, and an up and down sliding structure is formed between the limit block and the driving base, a return spring is provided above the limit block to provide a downward thrust for the limit block, and a control ring is fixed to the upper end of the limit block to control the movement of the limit block by the control ring.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] (1) The train frame welding bridge workstation uses a dual-point motor drive mechanism, one active and one auxiliary. The auxiliary motor drive mechanism parameters are completely controlled by the parameters of the active motor drive mechanism. The coordinated work enables the two drive bases in the bridge workstation to slide smoothly on the guide rail through dual motor drive;

[0023] (2) The train frame welding bridge workstation can limit the maximum travel position of the driving base through the braking mechanism, and also provide insurance for the movement of the driving base to prevent it from derailing;

[0024] (3) The train frame welding bridge workstation can shield and protect the opening above the tooth plate through the setting of the gear protection mechanism, thereby preventing the waste chips or external impurities generated during processing from falling into the meshing area between the tooth plate and the gear transmission mechanism, affecting the smooth movement of the subsequent driving base;

[0025] (4) The train frame welding bridge workstation provides a rotational reset force for the reel through a torsion spring, so that the protection belts on the left and right sides of the driving base can be automatically reeled and unreeled on the reel when the driving base moves, so that the protection belts can continue to maintain the shielding effect when the driving base moves, and will not affect the normal operation of the driving base;

[0026] (5) The train frame welding bridge workstation can lock the connection between the docking block and the docking groove through the limit block to complete the installation of the protective belt. When the tooth plate needs to be inspected or lubricated later, the connection between the traction plate and the driving base can be released by releasing the connection between the docking block and the docking groove, so that the reel can retract the protective belt and expose the tooth plate, which is convenient for inspection and other maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the brake mechanism of the utility model;

[0029] Figure 3 This is a schematic diagram of the connection structure between the driving base and the supporting guide rail of the utility model;

[0030] Figure 4 This is a schematic diagram of the side section structure of the support guide rail of the utility model;

[0031] Figure 5 This is a schematic diagram of the structure of the driving base of the utility model when viewed from above;

[0032] Figure 6 This is a schematic diagram of the top view of the protective belt structure of the utility model;

[0033] Figure 7 This is a schematic diagram of the main cross-sectional structure of the docking block of the utility model.

[0034] In the figure: 1. bridge gantry; 2. driving base; 201. auxiliary wheel; 3. braking mechanism; 301. buffer; 302. mounting plate; 303. brake plate; 304. travel sensing plate; 305. overtravel sensor; 4. supporting guide rail; 5. motor driving mechanism; 6. tooth plate; 7. gear transmission mechanism; 8. protective belt; 9. winding shaft; 10. torsion spring; 11. traction plate; 12. docking block; 13. locking groove; 14. docking groove; 15. limit block; 16. reset spring; 17. control circle. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] See also Figure 1-Figure 7The utility model provides a technical solution: a bridge workstation for welding a train skeleton, comprising a bridge gantry 1, a driving base 2, a supporting guide rail 4, a tooth plate 6 and a gear transmission mechanism 7, the driving base 2 is connected to the bottom of the bridge gantry 1, and the supporting guide rail 4 is connected to the bottom of the driving base 2, and the supporting guide rail 4 is symmetrically arranged front and back about the center line of the bridge gantry 1, a tooth plate 6 is fixed inside the supporting guide rail 4, and the surface of the tooth plate 6 is meshed with a gear transmission mechanism 7, and the gear transmission mechanism 7 is installed below the driving base 2;

[0037] Embodiment 1:

[0038] like Figure 1-Figure 2 The technical solution shown in the present invention provides a technical solution: a train frame welding bridge workstation discloses:

[0039] A motor drive mechanism 5 is installed above the driving base 2, and the motor drive mechanism 5 and the driving base 2 are arranged in a one-to-one correspondence, so that the two groups of driving bases 2 can be driven synchronously and stably. A horizontal sliding structure is formed between the driving base 2 and the supporting guide rail 4, and a gear protection mechanism is arranged above the supporting guide rail 4, and the gear protection mechanism is respectively located on the left and right sides of the driving base 2 to protect the meshing position of the gear transmission mechanism 7 and the tooth plate 6. The gear protection mechanism can automatically adjust the position as the driving base 2 moves. An auxiliary wheel 201 is rotatably installed below the driving base 2, and the auxiliary wheel 201 assists the driving base 2 in sliding on the supporting guide rail 4. A braking mechanism 3 is arranged on the right end of the supporting guide rail 4 to brake the driving base. The maximum stroke of the base 2 is limited, and the moving distance of the driving base 2 is detected. The braking mechanism 3 includes a buffer 301, a mounting plate 302, a brake plate 303, a stroke sensing plate 304, and an over-stroke sensor 305. The buffer 301 is arranged at the right end of the supporting guide rail 4, the mounting plate 302 is arranged on the right side of the buffer 301 to provide installation support for the buffer 301, and the mounting plate 302 is fixed to the right end of the supporting guide rail 4, the brake plate 303 is fixed to the right side of the driving base 2, the stroke sensing plate 304 is installed under the driving base 2 to monitor the stroke of the driving base 2, and the over-stroke sensor 305 is installed on the right side of the supporting guide rail 4, and the over-stroke sensor 305 is located on the left side of the buffer 301;

[0040] When in use, the two sets of motor drive mechanisms 5 can synchronously control the gear transmission mechanism 7 to work, so that it moves on the tooth plate 6, and the driving base 2 moves on the supporting guide rail 4, and the bridge gantry 1 is controlled to move, so that it can subsequently maintain flat operation and reduce operation deviation. The moving distance of the driving base 2 can be detected by the stroke sensing plate 304. At the same time, the maximum moving distance of the driving base 2 can be limited by the over-travel sensor 305 and the buffer 301 to prevent the driving base 2 from detaching from the supporting guide rail 4, and also to protect the driving base 2.

[0041] Embodiment 2:

[0042] like Figure 3-Figure 6 The technical solution shown in the present invention provides a technical solution: a train frame welding bridge workstation discloses:

[0043] The gear protection mechanism includes a protection belt 8, a winding shaft 9, a torsion spring 10 and a traction plate 11. The protection belt 8 is arranged above the support guide rail 4 to cover the opening of the support guide rail 4. The winding shaft 9 is rotatably installed at the end of the support guide rail 4. The end of the protection belt 8 is wound around the surface of the winding shaft 9. The torsion spring 10 is installed at the end of the winding shaft 9 to provide a rotational reset force for the winding shaft 9 so that the winding shaft 9 can rewind the protection belt 8. The traction plate 11 is fixed to the end of the protection belt 8, and a left-right sliding structure is formed between the traction plate 11 and the support guide rail 4, and the traction plate 11 is connected to the driving base 2 and moves with the movement of the driving base 2.

[0044] When the driving base 2 moves, the protective belt 8 will be driven to move through the traction plate 11, so that the protective belt 8 maintains the shielding and protective effect on the supporting guide rail 4. When the protective belt 8 is pulled, the protective belt 8 will be unwound on the winding shaft 9, and the torsion spring 10 will accumulate force. When the protective belt 8 is relaxed, the winding shaft 9 will reverse under the action of the torsion spring 10, and the protective belt 8 will be wound up to keep it smooth, so that the protective belt 8 can maintain its protective effect when the driving base 2 moves.

[0045] Embodiment three:

[0046] like Figure 6-Figure 7 The technical solution shown in the embodiment 2 is based on the present invention to provide a technical solution: a train frame welding bridge workstation, which discloses:

[0047] The traction plate 11 and the driving base 2 are detachably connected. The tooth plate 6 can be released by releasing the connection between the traction plate 11 and the driving base 2. An "L"-shaped docking block 12 is fixed above the traction plate 11, and a locking groove 13 is provided in the middle of the docking block 12. A docking groove 14 is provided on the side of the driving base 2, and a concave-convex matching structure is formed between the docking groove 14 and the docking block 12. A limit block 15 is provided above the docking groove 14, and the outer side of the limit block 15 is designed in an inclined structure, and an up-and-down sliding structure is formed between the limit block 15 and the driving base 2. A reset spring 16 is provided above the limit block 15 to provide a downward thrust for the limit block 15, and a control ring 17 is fixed to the upper end of the limit block 15 to control the movement of the limit block 15 through the control ring 17;

[0048] When the tooth plate 6 structure needs to be inspected and maintained, the protection belt 8 can be removed from above the tooth plate 6. During operation, the control circle 17 can be pulled to pull the limit block 15 to move, and the connection between the limit block 15 and the locking groove 13 is released, so that the docking block 12 can be pulled out from the docking groove 14. At this time, the reel 9 can reel up the protection belt 8 and pull the traction plate 11 to move so that it leaks out from above the tooth plate 6. When the protection belt 8 needs to be installed later, the traction plate 11 is pulled and the docking block 12 is inserted into the docking groove 14, so that the limit block 15 can be connected to the locking groove 13 under the action of the reset spring 16, and the docking block 12 is limited in the docking groove 14, so that the subsequent traction plate 11 can move with the driving base 2.

[0049] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0050] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A train frame welding bridge workstation, comprising a bridge gantry (1), a driving base (2), a support rail (4), a tooth plate (6) and a gear transmission mechanism (7), wherein the driving base (2) is connected to the bottom of the bridge gantry (1), and the support rail (4) is connected to the bottom of the driving base (2), and the support rail (4) is symmetrically arranged front and back about the center line of the bridge gantry (1), a tooth plate (6) is fixed inside the support rail (4), and the surface of the tooth plate (6) is meshed with the gear transmission mechanism (7), and the gear transmission mechanism (7) is installed below the driving base (2); Features: A motor drive mechanism (5) is installed above the driving base (2), and the motor drive mechanism (5) and the driving base (2) are arranged in a one-to-one correspondence, so that the two groups of driving bases (2) can be synchronously and stably driven. A horizontal sliding structure is formed between the driving base (2) and the supporting guide rail (4), and a gear protection mechanism is arranged above the supporting guide rail (4). The gear protection mechanism is respectively located on the left and right sides of the driving base (2) to protect the meshing position of the gear transmission mechanism (7) and the tooth plate (6). The gear protection mechanism can automatically adjust its position as the driving base (2) moves.

2. A train frame welding bridge workstation according to claim 1, characterized in that: An auxiliary wheel (201) is rotatably mounted below the driving base (2), and the auxiliary wheel (201) assists the driving base (2) in sliding on the supporting guide rail (4).

3. A train frame welding bridge workstation according to claim 1, characterized in that: A braking mechanism (3) is provided at the right end of the support guide rail (4) to limit the maximum travel of the driving base (2) and detect the moving distance of the driving base (2).

4. A train frame welding bridge workstation according to claim 3, characterized in that: The braking mechanism (3) comprises a buffer (301), a mounting plate (302), a braking plate (303), a travel sensing plate (304), and an over-travel sensor (305); A buffer (301) is arranged at the right end of the supporting guide rail (4); A mounting plate (302) is arranged on the right side of the buffer (301) to provide mounting support for the buffer (301), and the mounting plate (302) is fixed to the right end of the supporting guide rail (4); A brake plate (303) fixes the right side of the driving base (2); A stroke sensing plate (304) is installed below the driving base (2) to monitor the stroke of the driving base (2); The over-travel sensor (305) is installed on the right side of the support rail (4), and the over-travel sensor (305) is located on the left side of the buffer (301).

5. A train frame welding bridge workstation according to claim 1, characterized in that: The gear protection mechanism comprises a protection belt (8), a reel (9), a torsion spring (10) and a traction plate (11); A protective strip (8) is arranged above the support rail (4) to cover the opening of the support rail (4); A reel (9) is rotatably mounted on the end of the support rail (4), and the end of the protective belt (8) is wound around the surface of the reel (9); A torsion spring (10) is installed at the end of the reel (9) to provide a rotational reset force for the reel (9) so that the reel (9) can reel the protective belt (8); The traction plate (11) is fixed to the end of the protection belt (8), and a left-right sliding structure is formed between the traction plate (11) and the support guide rail (4). The traction plate (11) is connected to the driving base (2) and moves with the movement of the driving base (2).

6. A train frame welding bridge workstation according to claim 5, characterized in that: The traction plate (11) and the driving base (2) are detachably connected, and the tooth plate (6) can be released by releasing the connection between the traction plate (11) and the driving base (2).

7. A train frame welding bridge workstation according to claim 5 or 6, characterized in that: An "L"-shaped docking block (12) is fixed above the traction plate (11), and a locking groove (13) is provided in the middle of the docking block (12). A docking groove (14) is provided on the side of the driving base (2), and a concave-convex matching structure is formed between the docking groove (14) and the docking block (12). A limit block (15) is arranged above the docking groove (14), and the outer side of the limit block (15) is designed in an inclined structure, and an up-and-down sliding structure is formed between the limit block (15) and the driving base (2). A return spring (16) is arranged above the limit block (15) to provide a downward thrust for the limit block (15), and a control ring (17) is fixed at the upper end of the limit block (15), and the movement of the limit block (15) is controlled by the control ring (17).

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