Buffer extension bar

Abstract

The utility model discloses a buffer extension bar, which relates to the technical field of cranes and comprises an L-shaped mounting frame, a first extension bar is fixedly connected to the left side surface of the L-shaped mounting frame, a circular groove is formed in the left side surface of the first extension bar, a second extension bar is slidably connected to the surface of the circular groove, and a fixing block is fixedly connected to the left side surface of the second extension bar. A groove is formed in the left side face of the fixed block, a buffer block is slidably connected to the surface of the groove, a microswitch is mounted on the surface of the movable block, a controller is mounted on the upper surface of the L-shaped mounting frame and electrically connected with an emergency stop circuit of the hoisting equipment through a wire, and a buffer is mounted on the left side face of the buffer block. Through the arrangement of the first lengthening rod, the second lengthening rod, the fixing block, the buffer block and the buffer, the purpose of enabling the lifting process to be safer is achieved, and through the arrangement of the fixing block, the groove, the buffer spring, the microswitch and the controller, the purpose of improving the practicability of the lengthening rods is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a buffer extension rod. Background Technique

[0002] Electric single-girder cranes are all equipped with buffers. When the running position limiter or braking device of the crane fails, due to inertia, the crane or trolley running to the end will collide with the set stop at the running end. The purpose of setting the buffer is to absorb the running function of the crane or the hoisting trolley to slow down the impact. Generally, polyurethane buffers are used.

[0003] A buffer support for an electric single-girder crane disclosed in the Chinese utility model patent application publication specification CN216426506U, although this utility model achieves the purpose of having better impact reduction through the settings of the first connecting rod, the second connecting rod, the first piston, the second piston, the third spring, the telescopic rod and the second spring, and achieves the purpose of improving the stability of the support through the settings of the sliding column, the moving slider and the first spring. However, when the crane is working, when the end beam limiter is abnormal and when the length of the goods is long, due to space limitations, in order to avoid the lifted goods from colliding with the wall, a longer buffer distance is required. The position of the existing end beam buffer is fixed. When hoisting large-sized goods, it is possible that the large-sized goods lifted may collide with the wall in the space before the buffer contacts the stop, resulting in the failure of the buffer. In order to avoid accidents, there is an urgent need for a buffer extension rod. Content of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] In view of the deficiencies of the prior art, the utility model provides a buffer extension rod, which solves the problems put forward in the above background technique.

[0006] (2) Technical Solution

[0007] To achieve the above object, the utility model is realized through the following technical solutions: A buffer extension rod includes an L-shaped mounting bracket. The left side surface of the L-shaped mounting bracket is fixedly connected with a first extension rod. A circular groove is formed on the left side surface of the first extension rod. A second extension rod is slidably connected to the surface of the circular groove. The left side surface of the second extension rod is fixedly connected with a fixing block. A groove is formed on the left side surface of the fixing block. A buffer block is slidably connected to the surface of the groove. The inner side surface of the groove is fixedly connected with a mounting block. A mounting groove is formed on the left side surface of the mounting block. A movable block is slidably connected to the surface of the mounting groove. A microswitch is installed on the surface of the movable block. A controller is installed on the upper surface of the L-shaped mounting bracket. The microswitch is electrically connected to the controller through a wire. The controller is electrically connected to the emergency stop circuit of the lifting equipment through a wire. A buffer is installed on the left side surface of the buffer block.

[0008] Optionally, a hoop bracket is fixedly connected to the upper surface of the first extension rod. The second extension rod is fixedly connected to the surface of the hoop bracket. The number of hoop brackets is three and they are evenly distributed.

[0009] Optionally, a first limit sliding groove is formed on the inner side surface of the circular groove. A first limit sliding block is fixedly connected to the outer surface of the second extension rod. The first limit sliding block slides in the first limit sliding groove. And the number of both the first limit sliding groove and the first limit sliding block is two.

[0010] Optionally, a fixing plate is fixedly connected to the left side surface of the L-shaped mounting bracket. A servo motor is installed on the upper surface of the fixing plate. The output end of the servo motor is fixedly connected with a rotating shaft. The rotating shaft penetrates through the fixing plate and the first extension rod, and a bearing is provided at the penetrating part. A first bevel gear is fixedly connected to the lower surface of the rotating shaft. A second bevel gear is meshed and driven on the surface of the first bevel gear.

[0011] Optionally, a lead screw is rotatably connected to the inner side surface of the circular groove through a bearing. A stop block is fixedly connected to the port on the left side of the circular groove. The other end of the lead screw is rotatably connected to the right side surface of the stop block through a bearing. The second extension rod is threadedly connected to the surface of the lead screw. A second bevel gear is fixedly connected to the outer surface on the right side of the lead screw. A rectangular through groove is formed on the surface of the second extension rod. The stop block and the rectangular through groove slide relative to each other.

[0012] Optionally, a buffer spring is fixedly connected to the inner side surface of the groove. The other end of the buffer spring is fixedly connected with the buffer block. The number of buffer springs is six and they are distributed in a circular array.

[0013] Optionally, a second spring is fixedly connected to the inner side surface of the mounting groove. The other end of the second spring is fixedly connected to the right side surface of the movable block. The mounting block, the movable block and the microswitch are arranged in the middle of the groove.

[0014] Optionally, a second limiting chute is provided on the side surface of the groove, and a second limiting slider is fixedly connected to the outer surface of the buffer block. The second limiting slider slides in the second limiting chute. The number of the second limiting chutes and the second limiting sliders is four, and they are distributed in a circumferential array.

[0015] The utility model provides a buffer lengthening rod, which has the following beneficial effects:

[0016] 1. For the buffer lengthening rod, through the settings of the first lengthening rod, the second lengthening rod, the fixing block, the buffer block and the buffer, the buffer lengthening rod has the effect of changing the distance between the buffer and the end beam, increasing the distance between the buffer and the end beam, enabling early collision buffering. When lifting large-sized goods in a limited space, by restricting the moving position of the end beam, collisions of the lifted goods are avoided, achieving the purpose of making the lifting process safer.

[0017] 2. For the buffer lengthening rod, through the settings of the fixing block, the groove, the buffer spring, the microswitch and the controller, the buffer lengthening rod has the effect of automatically stopping urgently after the buffer collides, enabling the lifting equipment to stop urgently and avoiding more serious accidents in the future. By adding the automatic emergency stop function, the purpose of improving the practicality of the lengthening rod is achieved. Description of the Drawings

[0018] Figure 1 is a three-dimensional structural schematic diagram of the utility model;

[0019] Figure 2 is of the utility model Figure 1 a structural schematic diagram of part A therein;

[0020] Figure 3 is a front-view sectional structural schematic diagram of the utility model;

[0021] Figure 4 is of the utility model Figure 3 a structural schematic diagram of part B therein;

[0022] Figure 5 is of the utility model Figure 3 a structural schematic diagram of part C therein;

[0023] Figure 6 is of the utility model Figure 3 a structural schematic diagram of part D therein.

[0024] In the figure: 1. L-shaped mounting bracket; 2. First extension rod; 3. Hoop bracket; 4. Circular groove; 401. First limiting sliding groove; 5. Second extension rod; 501. First limiting slider; 6. Stop block; 7. Rectangular through groove; 8. Lead screw; 9. Fixed plate; 10. Servo motor; 11. Rotating shaft; 12. First bevel gear; 13. Second bevel gear; 14. Fixed block; 15. Groove; 151. Second limiting sliding groove; 16. Buffer block; 161. Second limiting slider; 17. Buffer spring; 18. Mounting block; 19. Mounting groove; 20. Second spring; 21. Movable block; 22. Microswitch; 23. Controller; 24. Buffer Specific implementation manner

[0025] 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.

[0026] Embodiment 1

[0027] Please refer to Figures 1 to 4 , the present invention provides a technical solution: a buffer 24 extension rod, including an L-shaped mounting bracket 1, the left side surface of the L-shaped mounting bracket 1 is fixedly connected with a first extension rod 2, the upper surface of the first extension rod 2 is fixedly connected with a hoop bracket 3, the surface of the hoop bracket 3 is fixedly connected with a second extension rod 5. The number of hoop brackets 3 is three and they are evenly distributed. A circular groove 4 is opened on the left side surface of the first extension rod 2. The surface of the circular groove 4 is slidably connected with the second extension rod 5. The inner side surface of the circular groove 4 is provided with a first limiting sliding groove 401. The outer surface of the second extension rod 5 is fixedly connected with a first limiting slider 501. The first limiting slider 501 slides in the first limiting sliding groove 401, and the number of both the first limiting sliding groove 401 and the first limiting slider 501 is two. The left side surface of the L-shaped mounting bracket 1 is fixedly connected with a fixed plate 9. A servo motor 10 is installed on the upper surface of the fixed plate 9. The output end of the servo motor 10 is fixedly connected with a rotating shaft 11. The rotating shaft 11 penetrates through the fixed plate 9 and the first extension rod 2, and a bearing is provided at the penetration position. The lower surface of the rotating shaft 11 is fixedly connected with a first bevel gear 12. The surface of the first bevel gear 12 is meshed and driven with a second bevel gear 13. The inner side surface of the circular groove 4 is rotatably connected with a lead screw 8 through a bearing. A stop block 6 is fixedly connected to the left port of the circular groove 4. The other end of the lead screw 8 is rotatably connected with the right side surface of the stop block 6 through a bearing. The surface of the lead screw 8 is threadedly connected with the second extension rod 5. The outer surface on the right side of the lead screw 8 is fixedly connected with a second bevel gear 13. A rectangular through groove 7 is opened on the surface of the second extension rod 5. The stop block 6 and the rectangular through groove 7 slide relative to each other. The left side surface of the second extension rod 5 is fixedly connected with a fixed block 14. A groove 15 is opened on the left side surface of the fixed block 14. A buffer block 16 is slidably connected to the surface of the groove 15. A buffer 24 is installed on the left side surface of the buffer block 16.

[0028] For the purpose of making the lifting process safer, during use, the L-shaped mounting bracket 1 is installed at both ends of the end beam. When the space is limited and the size of the lifted goods is large, to avoid the goods colliding with the walls in the space, the position of the buffer 24 is changed so that the buffer 24 contacts the stop block 6 of the end beam track before the goods collide, which plays a role in restricting the moving distance of the end beam on the track, making the moving distance of the end beam shorter, and thus avoiding the goods colliding with the walls in the space. When adjusting the position of the buffer 24, the staff controls the output end of the servo motor 10 to rotate forward. The servo motor 10 drives the rotating shaft 11 to rotate, the rotating shaft 11 drives the first bevel gear 12 to rotate, the first bevel gear 12 drives the second bevel gear 13, and then the lead screw 8 rotates, causing the second lengthening rod 5 on the surface of the lead screw 8 to slide in the circular groove 4. During the sliding process of the second lengthening rod 5, the first limit slider 501 on the outer surface of the second lengthening rod 5 slides in the first limit sliding groove 401 on the inner surface of the circular groove 4, which plays a role in limiting, and thus the second lengthening rod 5 can extend outward in the circular groove 4. As the second lengthening rod 5 moves outward, it drives the fixed block 14 and the buffer 24 to move outward together, thereby changing the position of the buffer 24 and increasing the distance between the buffer 24 and the end beam, enabling early collision buffering. When lifting large-sized goods in a limited space, by restricting the moving position of the end beam, the lifted goods are prevented from colliding, achieving the purpose of making the lifting process safer.

[0029] Embodiment 2

[0030] Please refer to Figure Figure 1 、 Figure 3 、 Figure 5 and Figure 6, the present utility model provides a technical solution: a buffer 24 extension rod, which includes an L-shaped mounting bracket 1. The left side surface of the L-shaped mounting bracket 1 is fixedly connected with a first extension rod 2. A circular groove 4 is opened on the left side surface of the first extension rod 2. A second extension rod 5 is slidably connected to the surface of the circular groove 4. The left side surface of the second extension rod 5 is fixedly connected with a fixing block 14. A groove 15 is opened on the left side surface of the fixing block 14. A buffer spring 17 is fixedly connected to the inner side surface of the groove 15. The other end of the buffer spring 17 is fixedly connected with a buffer block 16. The number of buffer springs 17 is six, and they are distributed in a circumferential array. A buffer block 16 is slidably connected to the surface of the groove 15. An installation block 18 is fixedly connected to the inner side surface of the groove 15. An installation groove 19 is opened on the left side surface of the installation block 18. A movable block 21 is slidably connected to the surface of the installation groove 19. A micro switch 22 is installed on the surface of the movable block 21. A controller 23 is installed on the upper surface of the L-shaped mounting bracket 1. The micro switch 22 is electrically connected to the controller 23 through a wire. The controller 23 is electrically connected to the emergency stop circuit of the hoisting equipment through a wire. A second spring 20 is fixedly connected to the inner side surface of the installation groove 19. The other end of the second spring 20 is fixedly connected to the right side surface of the movable block 21. The installation block 18, the movable block 21 and the micro switch 22 are arranged in the middle of the groove 15. A second limit sliding groove 151 is opened on the side surface of the groove 15. A second limit sliding block 161 is fixedly connected to the outer surface of the buffer block 16. The second limit sliding block 161 slides in the second limit sliding groove 151 on the surface of the groove 15. The number of the second limit sliding grooves 151 and the second limit sliding blocks 161 is four, and they are distributed in a circumferential array. A buffer 24 is installed on the left side surface of the buffer block 16.

[0031] In order to achieve the purpose of improving the practicability of the extension rod, during use, when the limiter of the end beam fails and the buffer 24 collides with the stop block 6 on the end beam track, the acting force generated by the collision acts on the buffer block 16 through the buffer 24, causing the buffer block 16 to slide inward in the groove 15. During the sliding process, the second limit sliding block 161 on the surface of the buffer block 16 slides in the second limit sliding groove 151 on the surface of the groove 15, playing a role in limiting until the right side of the second limit sliding block 161 abuts against the right side surface of the second limit sliding groove 151. At this time, the position of the buffer block 16 is fixed, and the buffer 24 further buffers. The buffer spring 17 is compressed. At the same time, the right side surface of the buffer block 16 comes into contact with the micro switch 22. After the micro switch 22 is triggered, the micro switch 22 automatically sends a signal to the controller 23 through a wire. After receiving the signal from the micro switch 22, the controller 23 controls the emergency stop circuit of the hoisting equipment to close, causing the hoisting equipment to stop urgently, avoiding more serious accidents in the future. By adding automatic emergency stop operation, the purpose of improving the practicability of the extension rod is achieved.

[0032] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, making equivalent substitutions or changes, shall be covered by the protection scope of the present utility model.

Claims

1. A buffer extension rod, comprising an L-shaped mounting frame, characterized in that: A first extension rod is fixedly connected to the left side of the L-shaped mounting frame, a circular groove is provided on the left side of the first extension rod, a second extension rod is slidably connected to the surface of the circular groove, a fixed block is fixedly connected to the left side of the second extension rod, a groove is provided on the left side of the fixed block, a buffer block is slidably connected to the surface of the groove, a mounting block is fixedly connected to the inner side of the groove, a mounting groove is provided on the left side of the mounting block, a movable block is slidably connected to the surface of the mounting groove, a micro switch is installed on the surface of the movable block, a controller is installed on the upper surface of the L-shaped mounting frame, the micro switch is electrically connected to the controller through a wire, the controller is electrically connected to the emergency stop circuit of the lifting equipment through a wire, and a buffer is installed on the left side of the buffer block.

2. The buffer extension rod according to claim 1, characterized in that: A hoop frame is fixedly connected to the upper surface of the first extension rod, and a second extension rod is fixedly connected to the surface of the hoop frame. The number of the hoop frames is three and they are equidistantly distributed.

3. The buffer extension rod according to claim 1, characterized in that: The inner side surface of the circular groove is provided with a first limiting slide groove, the outer surface of the second extension rod is fixedly connected with a first limiting slider, the first limiting slider slides in the first limiting slide groove, and the number of the first limiting slide groove and the first limiting slider are both two.

4. The buffer extension rod according to claim 1, characterized in that: A fixing plate is fixedly connected to the left side of the L-shaped mounting frame, a servo motor is installed on the upper surface of the fixing plate, a rotating shaft is fixedly connected to the output end of the servo motor, the rotating shaft passes through the fixing plate and the first extension rod, and a bearing is provided at the penetration point, a first bevel gear is fixedly connected to the lower surface of the rotating shaft, and a second bevel gear is meshed and transmitted on the surface of the first bevel gear.

5. The buffer extension rod according to claim 4, characterized in that: The inner side surface of the circular groove is rotatably connected to a lead screw via a bearing, a stopper is fixedly connected to the port on the left side of the circular groove, the other end of the lead screw is rotatably connected to the right side surface of the stopper via a bearing, a second extension rod is threadedly connected to the surface of the lead screw, a second bevel gear is fixedly connected to the outer surface on the right side of the lead screw, a rectangular through groove is provided on the surface of the second extension rod, and the stopper slides relative to the rectangular through groove.

6. The buffer extension rod according to claim 1, characterized in that: The inner side surface of the groove is fixedly connected with a buffer spring, and the other end of the buffer spring is fixedly connected with a buffer block. The number of the buffer springs is six and they are distributed in a circular array.

7. The buffer extension rod according to claim 1, characterized in that: The inner side surface of the mounting groove is fixedly connected with a second spring, and the other end of the second spring is fixedly connected to the right side surface of the movable block. The mounting block, the movable block and the micro switch are arranged in the middle of the groove.

8. The buffer extension rod according to claim 1, characterized in that: A second limiting slide groove is provided on the side of the groove, and a second limiting slider is fixedly connected to the outer surface of the buffer block. The second limiting slider slides in the second limiting slide groove. The number of the second limiting slide grooves and the second limiting slider is four and distributed in a circular array.

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