Welding device for elevator car frame

Abstract

The invention discloses a welding device for an elevator car frame, and relates to the technical field of welding devices.The welding device comprises a bottom plate, supporting frames are symmetrically and fixedly connected to the top surface of one side of the bottom plate through bolts, and a driving motor is fixedly installed on the outer surface of one supporting frame; through rotating arrangement of the limiting frame, the original welding mode of the lift car bottom supporting plate and the steel beam can be changed from a horizontal state to a vertical state, so that a worker only moves in a small range and does not need to move to the four corners of the lift car bottom supporting plate for respective welding in the welding process through the external welding device, and the welding efficiency is improved. In the vertical state, the welding area is more concentrated, a worker can complete welding of a plurality of parts at a time, the tedious operation of repeatedly adjusting the position is avoided, welding of the lift car bottom supporting plate and the steel beam is conducted in the vertical state, and the welding efficiency is improved. In the specific using process, welding of the lift car bottom supporting plate and the steel beam can be rapidly completed in a two-side double-station welding mode, and the production speed is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of welding devices, and particularly to a welding device for an elevator car frame. Background Technique

[0002] The car is a box-shaped space used by the elevator to carry and transport people and materials. The car generally consists of main components such as a car bottom, car walls, car top, car door, etc., and is a car body component used by the elevator to carry passengers or goods and other loads.

[0003] In the prior art when welding an elevator car, the bottom plate of the car is usually placed horizontally in a welding jig. After clamping and fixing the bottom plate of the car, the four crossbeams at the edge of the car frame are aligned and then welded to the bottom plate of the car. During this welding process, due to the size setting of the car frame, when manually welding, the welder needs to change positions after welding one steel beam and weld the next steel beam. After each steel beam is welded, the welder needs to move to the position of the next steel beam, which increases the non-welding time and reduces the overall welding efficiency. Moreover, during the welding of the steel beams, due to different welding positions, the welder also needs to change the welding surface, that is, adjust the welding direction, so as to complete the different weldings of one steel beam. The welder needs to frequently adjust the angle and position of the welding torch, resulting in a discontinuous welding process and further prolonging the operation time. Therefore, we propose a welding device for an elevator car frame to solve the above problems. Summary of the Invention

[0004] In view of this, aiming at the deficiencies of the prior art, the present invention provides a welding device for an elevator car frame to solve the problems raised in the above background technique.

[0005] Technical Solution To achieve the above object, the present invention provides the following technical solution: A welding device for an elevator car frame, including a bottom plate, on the top surface of one side of the bottom plate, there are symmetrically fixed connection support frames through bolts, and a driving motor is fixedly installed on the outer surface of one of the support frames. There is also a limit component arranged on the support frames. The limiting component includes a limiting frame rotatably connected inside two support frames. The limiting frame is set as a rectangular frame structure. Limiting blocks are fixedly connected to the four corners of the outer surface of one side of the limiting frame. A positioning rod is rotatably connected inside the two limiting blocks on the same side. Driven sliders are symmetrically arranged on the outer surfaces of the two positioning rods with the vertical central axis of the positioning rod as the reference. Positioning blocks are equidistantly and fixedly connected to the outer surfaces of the two driven sliders close to each other. Spring telescopic rods are symmetrically and fixedly connected to the outer surfaces of each positioning block away from the driven slider. The two spring telescopic rods on each positioning block are fixedly connected to a pressing rod at the ends away from the positioning block. Rectangular support plates are rotatably connected to the inner surfaces of the four corners of the limiting frame. Damping rotating rods are damping rotatably connected to the four corners of the outer surface of the limiting frame away from the driven slider.

[0006] Preferably, the limiting frame is arranged between the two support frames, and the output shaft end of the driving motor penetrates through one of the support frames and is fixedly connected to the middle of the outer surface of the limiting frame. The two positioning rods are arranged vertically in the same vertical plane. The positioning rod at the upper part is composed of two round rods with spiral grooves on their outer surfaces and is rotatably connected to each other. The positioning rod at the lower part is a round rod with a smooth outer surface. The tops of the two driven sliders are respectively threadedly connected to the two ends of the positioning rod at the upper part, and the bottoms of the two driven sliders are slidably connected to the outer surface of the positioning rod at the lower part. Through grooves are opened inside the driven sliders.

[0007] Preferably, the outer surface of the rectangular support plate away from the damping rotating rod is arranged to fit the outer surface of the driven slider, and the outer surface of the end of the damping rotating rod away from the limiting frame abuts against the outer surface of the rectangular support plate.

[0008] Preferably, it further includes a support component arranged between the two driven sliders; The support component includes a bidirectional threaded rod rotatably connected inside the two driven sliders respectively. Driven limit parts are symmetrically arranged on the upper and lower outer surfaces of the two bidirectional threaded rods with the horizontal central axis of the bidirectional threaded rod as the reference. A connecting piece is slidably connected between the two driven limit parts on the same side. A positioning round rod is fixedly connected to the outer surface of the connecting piece away from the driven slider. A driven wedge block is slidably connected inside each driven limit part. Clamping plates I are fixedly connected to the outer surfaces of the two driven wedge blocks close to each other in the same vertical plane. Connecting rods are fixedly connected to the outer surfaces of the two clamping plates I close to each other. Clamping plates II are slidably connected to the outer surfaces of the connecting rods. Connecting springs are sleeved on the outer surfaces of the connecting rods.

[0009] Preferably, the bidirectional threaded rod is arranged in the through groove opened inside the driven slider. The top of the bidirectional threaded rod penetrates and extends to the outside of the driven slider. The outer surfaces of the two ends of the bidirectional threaded rod are provided with threads with opposite spiral directions. The two ends of the positioning round rod respectively penetrate and are slidably connected inside the two driven wedge blocks located in the same horizontal plane.

[0010] Preferably, the connecting rod is arranged on the side of the first clamping plate away from the driven slider, the connecting spring is arranged between the first clamping plate and the rectangular support plate, and both ends of the connecting spring are fixedly connected to the outer surfaces of the first clamping plate and the second clamping plate respectively.

[0011] Preferably, it further includes a guiding component arranged on the upper surface of the bottom plate; The guiding component includes fixed track plates symmetrically and fixedly connected to the upper surface of the bottom plate. Trajectory limiting rods are fixedly connected between the outer surfaces of the upper and lower ends of the two fixed track plates. Trajectory limiting sliders are slidably connected to both ends of the outer surfaces of the two trajectory limiting rods. A sliding groove is penetrated through the inside of the trajectory limiting slider. A spiral rotating rod is rotatably connected to the sliding groove opened in the trajectory limiting slider. A knob is fixedly connected to the outer surface of the spiral rotating rod near one end of the trajectory limiting rod. A supporting track plate is threadedly connected to the outer surface of the spiral rotating rod.

[0012] Preferably, the four trajectory limiting sliders are respectively arranged at the upper and lower ends of the two fixed track plates, and the two trajectory limiting sliders on the same side are axially symmetrically arranged with reference to the horizontal plane of the fixed track plate.

[0013] Preferably, one end of the spiral rotating rod penetrates and extends to the outside of the trajectory limiting slider. The supporting track plate is slidably connected to the sliding groove opened inside the trajectory limiting slider, and the end of the supporting track plate away from the spiral rotating rod is arranged outside the trajectory limiting slider.

[0014] Beneficial effects Compared with the prior art, the present invention provides a welding device for an elevator car frame, which has the following beneficial effects: Through the rotational setting of the limiting frame, the welding method between the original bottom plate of the car and the steel beam can be changed from a horizontal state to a vertical state. Thus, during the welding process by the external welding device by the staff, the staff only needs to move within a small range, without moving to the four corners of the bottom plate of the car for welding respectively. In the vertical state, the welding area is more concentrated, and the staff can complete the welding of multiple parts at one time, avoiding the cumbersome operation of repeatedly adjusting the position. Moreover, when welding the bottom plate of the car and the steel beam in the vertical state, the welding of the bottom plate of the car and the steel beam can be quickly completed by the double-station welding method on both sides during specific use, accelerating the production speed; Through the setting of the driven slider and the extrusion rod, the bottom plate of the car in a horizontal state can be quickly fixed, which can adapt to the welding of cars of different sizes, can quickly fix the bottom plate of the car, shortening the clamping time. In addition, when adapting to the welding of cars of different sizes, there is no need to replace or adjust the fixture, and the quick clamping can be directly achieved through the driven slider and the extrusion rod, reducing the preparatory work before production; Through the settings of the frame - type limiting frame, the first clamping plate, the second clamping plate and the extrusion rod, when the clamping device fixes the position of the bottom plate of the car and the steel beam, the welding position between the two will not be covered, making the welding operation more direct and convenient. The welder can directly weld the contact surface between the steel beam and the bottom plate of the car without adjusting the angle or position. Through the setting of the movable support track plate, the movement track of the steel beam is limited, ensuring that the steel beam can quickly reach the state of contacting the bottom plate of the car. The support track plate provides a clear movement track for the steel beam, avoiding the cumbersome process of manual position adjustment, ensuring that the steel beam can quickly and accurately reach the contact position with the bottom plate of the car, and greatly shortening the assembly time. Through the combined setting of the support track plate, the first clamping plate and the second clamping plate, during the welding process of the steel beam and the bottom plate of the car, the steel beam can be kept in a horizontal state by the two - point support method. The two - point support method can effectively prevent the steel beam from tilting or twisting due to its own weight or welding thermal deformation during the welding process, ensuring that the contact surface between the steel beam and the bottom plate of the car always remains horizontal, thereby improving the welding precision. Moreover, the steel beam remains in a horizontal state during the welding process, avoiding welding defects caused by position deviation or deformation. Brief Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the overall appearance structure of the present invention; Figure 2 For the present invention Figure 1 It is a schematic diagram of the structure from another perspective; Figure 3 It is a schematic diagram of the connection relationship at the trajectory - limiting slider of the present invention; Figure 4 It is a schematic diagram of the positional relationship at the driven limiting part of the present invention; Figure 5 It is a schematic diagram of the positional relationship at the support frame of the present invention; Figure 6 It is a schematic diagram of the positional relationship at the connecting part of the present invention; Figure 7 For the present invention Figure 6 It is an enlarged schematic diagram of the structure at A in the present invention; Figure 8 It is a schematic diagram of the positional relationship at the bidirectional screw rod of the present invention; Figure 9 For the present invention Figure 8 It is an enlarged schematic diagram of the structure at B in the present invention.

[0016] In the figure: 11, bottom plate; 12, support frame; 13, drive motor; 21. Limiting frame; 22. Limiting block; 23. Positioning rod; 24. Driven slider; 25. Positioning block; 26. Spring telescopic rod; 27. Extrusion rod; 28. Rectangular support plate; 29. Damping rotating rod; 31. Bi-directional threaded rod; 32. Driven limiting member; 33. Connecting member; 34. Positioning round rod; 35. Driven wedge block; 36. Clamping plate one; 37. Connecting rod; 38. Clamping plate two; 39. Connecting spring; 41. Fixed track plate; 42. Trajectory limiting rod; 43. Trajectory limiting slider; 44. Spiral rotating rod; 45. Knob; 46. Support track plate. Specific embodiments

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0018] Embodiments of the present invention Please refer to Figure 1 、 Figure 2 and Figures 4 to 8 , a welding device for an elevator car frame, including a bottom plate 11. On the top surface of one side of the bottom plate 11, support frames 12 are symmetrically and fixedly connected by bolts. A driving motor 13 is fixedly installed on the outer surface of one of the support frames 12. It also includes a limiting component arranged on the support frames 12; The limiting component includes a limiting frame 21 rotatably connected inside two support frames 12. The limiting frame 21 is set as a rectangular frame structure. At four corners on the outer surface of one side of the limiting frame 21, limiting blocks 22 are fixedly connected. Inside the two limiting blocks 22 on the same side, a positioning rod 23 is rotatably connected. On the outer surfaces of the two positioning rods 23, driven sliders 24 are arranged symmetrically with reference to the vertical central axis of the positioning rod 23. On the outer surfaces of the two driven sliders 24 close to each other, positioning blocks 25 are equidistantly and fixedly connected. On the outer surface of each positioning block 25 away from the driven slider 24, spring telescopic rods 26 are symmetrically and fixedly connected. At the ends of the two spring telescopic rods 26 on each positioning block 25 away from the positioning block 25, an extrusion rod 27 is fixedly connected in common. At the inner surfaces of the four corners of the limiting frame 21, rectangular support plates 28 are rotatably connected. At the four corners on the outer surface of the limiting frame 21 away from the driven slider 24, damping rotating rods 29 are damping rotatably connected.

[0019] Among them, the limit frame 21 is arranged between the two support frames 12, and the output shaft end of the driving motor 13 penetrates through one of the support frames 12 and is fixedly connected to the middle part of the outer surface of the limit frame 21. The two positioning rods 23 are arranged vertically in the same vertical plane. The positioning rod 23 located above is composed of two round rods with spiral grooves on their outer surfaces and is rotatably connected to each other. The positioning rod 23 located below is a round rod with a smooth outer surface. The tops of the two driven sliders 24 are respectively threadedly connected to the two ends of the positioning rod 23 located above. The bottoms of the two driven sliders 24 are slidably connected to the outer surface of the positioning rod 23 located below. A through groove is opened inside the driven slider 24.

[0020] Among them, the outer surface of the side of the rectangular support plate 28 away from the damping rotating rod 29 is arranged to fit the outer surface of the driven slider 24, and the outer surface of the end of the damping rotating rod 29 away from the limit frame 21 abuts against the outer surface of the rectangular support plate 28.

[0021] Among them, the driving motor 13 starts once and the output shaft rotates 90 degrees, and then the driving motor 13 is turned off. And when the driving motor 13 starts two adjacent times, the rotation direction of the output shaft of the driving motor 13 is opposite. That is, when the driving motor 13 is turned on last time, its output shaft rotates forward, then when the driving motor 13 starts next time, the rotation direction of its output shaft is reverse rotation.

[0022] Further embodiments Please refer to Figure 2 、 Figure 4 、 Figure 6 、 Figure 8 and Figure 9 The welding device for the elevator car frame further includes a support component arranged between the two driven sliders 24; The support component includes a bidirectional threaded rod 31 respectively rotatably connected to the two driven sliders 24. Driven limit pieces 32 are arranged on the outer surfaces of the upper and lower ends of the two bidirectional threaded rods 31 in an axisymmetric manner with reference to the horizontal central axis of the bidirectional threaded rod 31. A connecting piece 33 is slidably connected between the two driven limit pieces 32 on the same side. A positioning round rod 34 is fixedly connected to the outer surface of the connecting piece 33 away from the driven slider 24. A driven wedge block 35 is slidably connected inside each driven limit piece 32. Clamping plates 36 are fixedly connected to the outer surfaces of the two driven wedge blocks 35 close to each other in the same vertical plane. Connecting rods 37 are fixedly connected to the outer surfaces of the two clamping plates 36 close to each other. Clamping plates 38 are slidably connected to the outer surfaces of the connecting rods 37. Connecting springs 39 are sleeved on the outer surfaces of the connecting rods 37.

[0023] Among them, the bidirectional threaded rod 31 is arranged in the through groove opened inside the driven slider 24. The top end of the bidirectional threaded rod 31 penetrates and extends to the outside of the driven slider 24. The outer surfaces of both ends of the bidirectional threaded rod 31 are provided with threads with opposite spiral directions. Both ends of the positioning round rod 34 penetrate and are slidably connected to the inside of two driven wedges 35 located in the same horizontal plane.

[0024] Among them, the connecting rod 37 is arranged on the side of the first clamping plate 36 away from the driven slider 24. The connecting spring 39 is arranged between the first clamping plate 36 and the rectangular support plate 28, and both ends of the connecting spring 39 are fixedly connected to the outer surfaces of the first clamping plate 36 and the second clamping plate 38 respectively.

[0025] Among them, the driven limiting member 32 is threadedly connected to the outer surface of the bidirectional threaded rod 31 through a hollow ring rotatably connected inside it. Scales are provided on the outer surfaces of both ends of the driven slider 24, which is convenient for the staff to determine the position of the steel beam to be welded. At the same time, pointers are provided at both ends of the driven limiting member 32 to indicate the position of the driven limiting member 32 on the driven slider 24.

[0026] Further embodiments Please refer to Figures 1 to 3 , the welding device for the elevator car frame further includes a guiding component arranged on the upper surface of the bottom plate 11; The guiding component includes fixed track plates 41 symmetrically and fixedly connected to the upper surface of the bottom plate 11. Trajectory limiting rods 42 are fixedly connected between the outer surfaces of the upper and lower ends of the two fixed track plates 41. Trajectory limiting sliders 43 are slidably connected to both ends of the outer surfaces of the two trajectory limiting rods 42. A sliding groove is penetrated and opened inside the trajectory limiting slider 43. A spiral rotating rod 44 is rotatably connected in the sliding groove opened in the trajectory limiting slider 43. A knob 45 is fixedly connected to the outer surface of the spiral rotating rod 44 near one end of the trajectory limiting rod 42. A support track plate 46 is threadedly connected to the outer surface of the spiral rotating rod 44.

[0027] Among them, the four trajectory limiting sliders 43 are respectively arranged at the upper and lower ends of the two fixed track plates 41, and the two trajectory limiting sliders 43 on the same side are axially symmetrically arranged with reference to the horizontal plane of the fixed track plate 41.

[0028] Among them, one end of the spiral rotating rod 44 penetrates and extends to the outside of the trajectory limiting slider 43. The support track plate 46 is slidably connected to the sliding groove opened inside the trajectory limiting slider 43, and the end of the support track plate 46 away from the spiral rotating rod 44 is arranged outside the trajectory limiting slider 43.

[0029] Wherein, scales are provided on the outer surfaces at both ends of the fixed track plate 41 and at both ends of the track limiting rod 42, a pointer for indicating the scale on the fixed track plate 41 is provided on the outer surface of the support track plate 46, one end of the track limiting slider 43 close to the track limiting rod 42 is made of a transparent material, and a pointer is provided at this end of the track limiting slider 43, and this pointer is used to indicate the scale provided at both ends of the track limiting rod 42.

[0030] The working process and principle of the overall content of the above embodiment are as follows: In the prior art, when welding an elevator car frame, four steel beams need to be welded to the car bottom plate. Therefore, when this welding device is specifically used, refer to Figure 1 , the staff manipulates the driving motor 13 to start through an external controller, and drives the limit frame 21 fixedly connected thereto to rotate inside the support frame 12 through the output shaft of the driving motor 13, so that the limit frame 21 changes from the initial vertical state to the horizontal state. Subsequently, the staff manipulates the driving motor 13 to turn off, and the limit frame 21 stops rotating; It should be noted that the output shaft of the driving motor 13 rotates 90 degrees each time it starts, and then the driving motor 13 is turned off. Moreover, when the driving motor 13 starts adjacent times, the rotation direction of the output shaft of the driving motor 13 is opposite. That is, when the driving motor 13 is turned on last time, its output shaft rotates forward, then when the driving motor 13 starts next time, the rotation direction of its output shaft is reverse rotation; When the limit frame 21 rotates to the horizontal state, at this time, the staff places the car bottom plate to be welded between the limit frames 21 through an external hoisting device. And since the limit frame 21 is arranged in a frame structure, when the limit frame 21 and the limit blocks 22, driven sliders 24, extrusion rods 27, etc. arranged above it are located at the edge of the limit frame 21, they will not hinder the placement of the car bottom plate; Subsequently, the car bottom plate is horizontally placed inside the limit frame 21 in a horizontal state through an external hoisting device. And since the limit frame 21 is in a horizontal state, the rectangular support plates 28 arranged at the four corners of the limit frame 21 are also in a horizontal state at this time. The bottom surface of the car bottom plate placed inside the limit frame 21 by the hoisting device will contact the upper surface of the rectangular support plates 28; It should be noted that the rectangular support plates 28 in a horizontal state are always in a horizontal state with the limit frame 21 under the support of the damping rotating rods 29. Therefore, after the car bottom plate contacts the rectangular support plates 28, the rectangular support plates 28 will form supports at the four corners of the car bottom plate, thereby limiting the position of the car bottom plate; Subsequently, the staff rotates the positioning rod 23 located above. Since the two positioning rods 23 are arranged vertically in the same vertical plane, the positioning rod 23 located above is composed of two round rods with spiral grooves on their outer surfaces and is rotatably connected to each other. The positioning rod 23 located below is a round rod with a smooth outer surface. Therefore, when the staff rotates the two ends of the positioning rod 23 located above respectively, it will cause the driven sliders 24 threadedly connected to the outer surfaces of the two ends of the positioning rod 23 located above to approach each other, so that the two driven sliders 24 move towards the center of the limit frame 21, that is, towards the direction close to the two side edges of the bottom plate of the car to be welded; In the above process, since the bottom end of the driven slider 24 is slidably connected to the outer surface of the positioning rod 23 located below, the movement of the driven slider 24 is restricted by the positioning rod 23 located below, so as to perform stable and fixed movement in the horizontal direction; As the driven slider 24 moves, the spring telescopic rod 26 fixedly connected to the outer surface of the driven slider 24 away from the side where they approach each other will move accordingly, and then drive the extrusion rod 27 fixedly connected to the spring telescopic rod 26 to move synchronously. And as the driven slider 24 moves, the extrusion rod 27 will contact the outer surfaces of the two sides of the bottom plate of the car to be welded. And as the driven slider 24 continues to move, the spring telescopic rod 26 arranged between the driven slider 24 and the extrusion rod 27 will be subjected to pressures from two directions and gradually contract to the maximum extent, so as to clamp the two side edges of the bottom plate of the car to be welded; It should be noted that in the above process, since the spring telescopic rod 26 itself has a certain length, even when the spring telescopic rod 26 contracts to the maximum extent, there is still a certain gap between the positioning block 25 and the extrusion rod 27; Subsequently, the staff starts the drive motor 13 again, causing the output shaft of the drive motor 13 to rotate in the reverse direction, thereby driving the limit frame 21 to rotate reversely by ninety degrees inside the support frame 12, so that the limit frame 21 is changed from the horizontal state to the vertical state again. For details, refer to Figure 1 Or Figure 2 ; Through the rotational setting of the limit frame 21, the welding method between the bottom plate of the car and the steel beam can be changed from the horizontal state to the vertical state. Thus, when the staff performs welding through an external welding device, they only need to move within a small range and do not need to move to the four corners of the bottom plate of the car for welding respectively. In the vertical state, the welding area is more concentrated, and the staff can complete the welding of multiple parts at one time, avoiding the cumbersome operation of repeatedly adjusting the position. Moreover, when welding the bottom plate of the car and the steel beam in the vertical state, the welding of the bottom plate of the car and the steel beam can be quickly completed by the double-station welding method on both sides during specific use, accelerating the production speed; Through the settings of the driven slider 24 and the extrusion rod 27, the bottom plate of the car in a horizontal state can be quickly fixed, which can adapt to the welding of cars with different sizes, can achieve the quick fixing of the bottom plate of the car, shorten the clamping time. In addition, when adapting to the welding of cars with different sizes, there is no need to replace or adjust the fixture, and the quick clamping can be directly achieved through the driven slider 24 and the extrusion rod 27, reducing the preparatory work before production; Subsequently, the staff holds the tops of the two bidirectional threaded rods 31 and prompts the two bidirectional threaded rods 31 to be synchronously rotationally connected inside the driven slider 24. It should be noted that the rotation directions of the two bidirectional threaded rods 31 are opposite, and since driven limit pieces 32 are provided at both ends of the bidirectional threaded rod 31, and the driven limit pieces 32 are threadedly connected to the outer surface of the bidirectional threaded rod 31 through hollow rings rotatably connected inside them, the driven limit blocks 22 provided at both ends of the bidirectional threaded rod 31 will displace towards the center in the vertical direction of the limit frame 21; It should be noted that when the limit frame 21 is in a horizontal state, the movement of the two driven sliders 24 will synchronously drive the movement of the driven limit pieces 32, causing the driven limit pieces 32 to slide and contract into the connecting piece 33, avoiding the influence of the driven limit pieces 32 on the opposite movement of the driven sliders 24; At the same time, it should be noted that scales are provided on the outer surfaces of both ends of the driven slider 24, facilitating the staff to determine the position of the steel beam to be welded. At the same time, pointers are provided at both ends of the driven limit piece 32, which are used to indicate the position of the driven limit piece 32 on the driven slider 24; In the above process, as the driven limit piece 32 moves, the driven wedge block 35 slidably connected inside the driven limit piece 32 will move accordingly, thereby driving the clamping plate one 36, the connecting rod 37, the clamping plate two 38, and the connecting spring 39 connected thereto to move synchronously; Subsequently, the staff holds the knob 45 and rotates the knob 45, thereby causing the spiral rotating rod 44 to rotate inside the track limiting slider 43. It should be noted that scales are provided on the outer surfaces of both ends of the fixed track plate 41 and both ends of the track limiting rod 42, a pointer for indicating the scale on the fixed track plate 41 is provided on the outer surface of the support track plate 46, one end of the track limiting slider 43 close to the track limiting rod 42 is made of a transparent material, and a pointer is provided at this end of the track limiting slider 43, and this pointer is used to indicate the scales provided at both ends of the track limiting rod 42; Therefore, the staff determines the position of the support track plate 46 according to the size of the bottom plate of the car to be welded and the size of the steel beam to be welded, and rotates the spiral rotating rod 44 to cause the support track plate 46 to slide up and down inside the track limiting slider 43 until it moves to the designated position; It should be noted that in the above process, since the support track plates 46 are vertically arranged on the upper and lower sides of the fixed track plate 41, when the position of the steel beam to be welded is supported by the support track plates 46, the four steel beams need to be located on the upper surface of the support track plates 46, that is, the displacement distance of the two support track plates 46 located below the fixed track plate 41 from the two ends of the fixed track plate 41 toward the center is smaller than the displacement distance of the two support track plates 46 located above, specifically, the thickness of one steel beam; Then the staff placed one end of the four steel beams to be welded on the upper surface of the four support rail plates 46, and then pushed the steel beams to slide on the upper surface of the support rail plates 46 through the external lifting device, and the sliding direction was toward the limit frame 21; In the above process, among the clamping plates 36 disposed at the four corners of the limiting frame 21, the bottom surfaces of the two clamping plates 36 located at the top are located above the steel beam to be welded, and the upper surfaces of the two clamping plates 36 located at the bottom are located below the steel beam to be welded; Therefore, as the steel beam to be welded continues to move, the top surfaces of the two steel beams located above will contact the lower surfaces of the two clamping plates 1 36 located above, and at this time, the bottom surface of the steel beam will contact the top surface of the clamping plate 2 38 located above, thereby causing the clamping plate 2 38 to slide downward on the outer surface of the connecting rod 37, and the connecting spring 39 arranged between the clamping plate 1 36 and the clamping plate 2 38 will be stretched during the sliding process of the clamping plate 2 38; Similarly, the two steel beams located below will contact the upper surfaces of the two clamping plates 1 36 located below during the movement, and squeeze the lower surfaces of the two clamping plates 2 38 located below, thereby limiting the position of the steel beams to be welded; As the hoisting device continues to move, the steel beam to be welded will collide with the outer surface of the bottom support plate of the car. It should be noted that at this time, the steel beam to be welded is in a state of conflict with the bottom support plate of the car. Since the clamping plate 1 36 and the clamping plate 2 38 are arranged on the driven slider 24 through the driven limiter 32, the clamping position of the clamping plate 1 36 and the clamping plate 2 38 is slightly away from the contact position between the steel beam and the bottom support plate of the car, that is, there is a certain gap between the clamping position of the clamping plate 1 36 and the clamping plate 2 38 on the steel beam and the welding position of the steel beam and the bottom support plate of the car, which will not affect the welding of the steel beam and the bottom support plate of the car by the external welding gun; By setting the frame-type limit frame 21, the clamping plate 1 36, the clamping plate 2 38 and the extrusion rod 27, the clamping device will not cover the welding position between the bottom support plate of the car and the steel beam when fixing the position of the two, making the welding operation more direct and convenient. The welder can directly weld the contact surface between the steel beam and the bottom support plate of the car without adjusting the angle or position; By means of the arrangement of the movable support track plate 46, the movement track of the steel beam is defined, ensuring that the steel beam can quickly reach the state of abutting against the bottom support plate of the car. The support track plate 46 provides a clear movement track for the steel beam, avoiding the cumbersome process of manual position adjustment, ensuring that the steel beam can quickly and accurately reach the abutting position against the bottom support plate of the car, and greatly shortening the assembly time; Moreover, through the combined arrangement of the support track plate 46, the first clamping plate 36 and the second clamping plate 38, during the welding process of the steel beam and the bottom support plate of the car, the steel beam can be kept in a horizontal state by means of two-point support. The two-point support method can effectively prevent the steel beam from tilting or twisting due to its own weight or welding thermal deformation during the welding process, ensuring that the contact surface between the steel beam and the bottom support plate of the car always remains horizontal, thereby improving the welding precision. Moreover, the steel beam remains in a horizontal state during the welding process, avoiding welding defects caused by position deviation or deformation; After welding is completed, the staff can rotate the damping rotating rod 29 so that the damping rotating rod 29 is disengaged from the state of abutting against the outer surface of the rectangular support plate 28. Subsequently, the welded bottom support plate of the car and the steel beam can be removed from the left side of the welding device by means of an external hoisting device (refer to Figure 1 ), and at this time, the rectangular support plate 28 rotatably connected to the limit frame 21 will not affect the removal of the welded bottom support plate of the car and the steel beam.

[0031] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0032] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A welding device for an elevator car frame, comprising a bottom plate (11), the top surface of one side of the bottom plate (11) is symmetrically and fixedly connected with a support frame (12) by bolts, and a driving motor (13) is fixedly installed on the outer surface of one of the support frames (12), characterized in that: It further includes a limit component arranged on the support frame (12); The limit component includes a limit frame (21) rotatably connected inside two support frames (12). The limit frame (21) is set as a rectangular frame structure. Limit blocks (22) are fixedly connected to the four corners of the outer surface of one side of the limit frame (21). A positioning rod (23) is rotatably connected inside the two limit blocks (22) on the same side. Driven sliders (24) are symmetrically arranged on the outer surfaces of the two positioning rods (23) with the vertical central axis of the positioning rod (23) as the reference. Positioning blocks (25) are fixedly connected to the outer surfaces of the two driven sliders (24) close to each other at equal intervals. Spring telescopic rods (26) are symmetrically fixedly connected to the outer surfaces of each positioning block (25) away from the driven sliders (24). The ends of the two spring telescopic rods (26) on each positioning block (25) away from the positioning block (25) are fixedly connected to an extrusion rod (27) together. Rectangular support plates (28) are rotatably connected to the inner surfaces of the four corners of the limit frame (21). Damping rotating rods (29) are rotatably connected to the four corners of the outer surface of the limit frame (21) away from the driven sliders (24).

2. The welding device for an elevator car frame according to claim 1, characterized in that: The limit frame (21) is arranged between the two support frames (12), and the output shaft end of the driving motor (13) penetrates through one of the support frames (12) and is fixedly connected to the middle of the outer surface of the limit frame (21). The two positioning rods (23) are arranged vertically in the same vertical plane. The positioning rod (23) located above is composed of two round rods with spiral grooves on their outer surfaces rotatably connected to each other. The positioning rod (23) located below is a round rod with a smooth outer surface. The tops of the two driven sliders (24) are respectively threadedly connected to the two ends of the positioning rod (23) located above. The bottoms of the two driven sliders (24) are slidably connected to the outer surface of the positioning rod (23) located below. Through grooves are formed inside the driven sliders (24).

3. A welding device for an elevator car frame according to claim 1, characterized in that: The outer surface of the rectangular support plate (28) away from the damping rotating rod (29) is arranged to fit the outer surface of the driven slider (24). The outer surface of the end of the damping rotating rod (29) away from the limit frame (21) abuts against the outer surface of the rectangular support plate (28).

4. A welding device for an elevator car frame according to claim 2, characterized in that: It further includes a support component arranged between the two driven sliders (24); The support assembly includes a bidirectional threaded rod (31) rotatably connected to two driven sliders (24) respectively. On the outer surfaces of the upper and lower ends of the two bidirectional threaded rods (31), driven limit members (32) are arranged axially symmetrically with reference to the horizontal central axis of the bidirectional threaded rod (31). A connecting member (33) is slidably connected between two driven limit members (32) on the same side. A positioning round rod (34) is fixedly connected to the outer surface of the side of the connecting member (33) away from the driven slider (24). A driven wedge block (35) is slidably connected inside each driven limit member (32). On the outer surfaces of the two driven wedge blocks (35) on the same vertical plane and close to each other, a clamping plate one (36) is fixedly connected. On the outer surfaces of the two clamping plates one (36) close to each other, a connecting rod (37) is fixedly connected. A clamping plate two (38) is slidably connected to the outer surface of the connecting rod (37). A connecting spring (39) is sleeved on the outer surface of the connecting rod (37).

5. A welding device for an elevator car frame according to claim 4, characterized in that: The bidirectional threaded rod (31) is arranged in a through groove opened inside the driven slider (24). The top end of the bidirectional threaded rod (31) penetrates and extends to the outside of the driven slider (24). The outer surfaces of both ends of the bidirectional threaded rod (31) are provided with threads with opposite spiral directions. The two ends of the positioning round rod (34) respectively penetrate and are slidably connected inside two driven wedge blocks (35) located on the same horizontal plane.

6. The welding device for an elevator car frame according to claim 4, characterized in that: The connecting rod (37) is arranged on the side of the clamping plate one (36) away from the driven slider (24). The connecting spring (39) is arranged between the clamping plate one (36) and the rectangular support plate (28), and both ends of the connecting spring (39) are fixedly connected to the outer surfaces of the clamping plate one (36) and the clamping plate two (38) respectively.

7. A welding device for an elevator car frame according to claim 1, characterized in that: It further includes a guiding assembly arranged on the upper surface of the bottom plate (11); The guiding assembly includes fixed track plates (41) symmetrically and fixedly connected to the upper surface of the bottom plate (11). Trajectory limiting rods (42) are fixedly connected between the outer surfaces of the upper and lower ends of the two fixed track plates (41). Trajectory limiting sliders (43) are slidably connected to both ends of the outer surfaces of the two trajectory limiting rods (42). A sliding groove is penetrated and opened inside the trajectory limiting slider (43). A spiral rotating rod (44) is rotatably connected inside the sliding groove opened in the trajectory limiting slider (43). A knob (45) is fixedly connected to the outer surface of the end of the spiral rotating rod (44) close to the trajectory limiting rod (42). A support track plate (46) is threadedly connected to the outer surface of the spiral rotating rod (44).

8. A welding device for an elevator car frame according to claim 7, characterized in that: The four trajectory limiting sliders (43) are respectively arranged at the upper and lower ends of the two fixed track plates (41), and the two trajectory limiting sliders (43) on the same side are arranged axially symmetrically with reference to the horizontal plane of the fixed track plate (41).

9. A welding device for an elevator car frame according to claim 7, characterized in that: One end of the spiral rotating rod (44) penetrates and extends to the outside of the trajectory limiting slider (43). The support track plate (46) is slidably connected to the sliding groove opened inside the trajectory limiting slider (43), and the end of the support track plate (46) away from the spiral rotating rod (44) is arranged outside the trajectory limiting slider (43).

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