Buffer device for end beam of electric single-beam crane

Abstract

The utility model relates to the field of electric single-beam cranes, in particular to an end beam buffering device of an electric single-beam crane. According to the end beam buffering device of the electric single-beam crane, buffering bins are fixedly connected to the two ends of the bottom of an end beam, sleeve rods are arranged in the two buffering bins, fixing rods are movably connected into the sleeve rods, and springs are arranged in the fixing rods. The end beam buffering device of the electric single-beam crane has the following beneficial effects that when the electric hoist moves to a limit position, the electric hoist moves to the limit position to impact the buffering block, and the sleeve rod moves towards the inner side along the fixed rod; the movable block collides with the pawl to be separated from the ratchet wheel, and the rotating wheel of the electric hoist continues to rotate, so that the rotating belt is driven to rotate in the opposite direction, the rotating wheel of the electric hoist rotates on the surface of the rotating belt all the time, the rotating load of the electric hoist is offset, and overload short circuit of the motor is prevented.

Description

Technical Field

[0001] This utility model relates to the field of electric single-girder cranes, and in particular to an end beam buffer device for electric single-girder cranes. Background Technology

[0002] Electric single-girder cranes are common lifting equipment, widely used in factories, warehouses, logistics centers, and other places for vertical lifting and horizontal transport of heavy objects. Next, I will introduce them to you from the aspects of structure, working principle, advantages, and application scenarios. Existing buffer devices only stop the electric hoist at its current position during use, failing to remove the high load generated by the continuous rotation of the electric hoist's wheel, thus leading to a short circuit in the motor.

[0003] Therefore, it is necessary to provide a new end beam buffer device for electric single-girder cranes to solve the above-mentioned technical problems. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, an end beam buffer device for an electric single-girder crane is provided to solve the above-mentioned problems.

[0005] The electric single-girder crane end beam buffer device provided by this utility model includes: a buffer chamber fixedly connected to the bottom of the end beam; a sleeve rod arranged inside the buffer chamber; a fixed rod movably connected inside the sleeve rod; a spring arranged inside the fixed rod; a movable block fixedly connected to one end of the sleeve rod; a buffer block slidably connected to one side of the movable block; a fixed groove opened on the lower surface of the end beam in the buffer chamber; a rotating rod rotatably connected inside the fixed groove; a ratchet fixedly connected to the outer wall of the rotating rod; a pawl engaged below the ratchet; rotating grooves opened at both ends of both sides of the end beam; a roller mechanism arranged inside each of the multiple rotating grooves; and an electric push rod arranged at the bottom of the buffer chamber.

[0006] Preferably, the roller mechanism includes rollers symmetrically arranged in the rotating groove, each of the two rollers having a connecting band sleeved on its outer wall, and both rollers being rotatably connected to the rotating groove.

[0007] Preferably, a fixed plate is rotatably connected to the bottom of the movable block, a connecting hole is provided on the upper surface of the fixed plate, and a holding chamber is fixedly connected to the lower surface of the fixed plate directly below the connecting hole. A bolt is movably connected inside the holding chamber, and a limit ring is fixedly connected to the outer wall of the bolt.

[0008] Preferably, the fixed groove has holes on both sides for the rotating rod to pass through, and the two ends of the rotating rod are fixedly connected to two rollers respectively.

[0009] Preferably, the two sides of the pawl are rotatably connected to the fixing groove via a connecting shaft.

[0010] Preferably, the pawl penetrates through the upper surface of the buffer bin at one end and abuts against the movable block.

[0011] Compared with the related art, the electric single-beam crane end beam buffer device has the following beneficial effects: when the electric hoist moves to the limit position, the electric hoist hits the buffer block, the sleeve rod moves inward along the fixed rod, and the compression spring moves inward, so that the impact energy can be efficiently absorbed and buffered through the contraction of the spring, the impact load on the end beam is greatly reduced, the movable block hits the pawl to make it disengage from the ratchet wheel, since the electric hoist is not powered off, the rotating wheel will continue to rotate, thereby driving the rotating belt to rotate in the opposite direction, so that the rotating wheel of the electric hoist always rotates on the surface of the rotating belt, thereby offsetting the rotating load of the electric hoist and preventing the motor from overloading and short-circuiting.

[0012] The bolt can be separated from the movable block by rotating the bolt, the bolt stays in the storage bin, and the bolt can be prevented from being lost due to separation from the storage bin, the buffer block is removed, a new buffer block is slid into the movable block, and the bolt is rotated to the threaded hole at the bottom of the movable block to complete replacement. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 A preferred embodiment of the electric single-beam crane end beam buffer device provided by the utility model is shown in the structural schematic view.

[0014] Figure 2 For Figure 1 The structure of the fixed groove is shown in the structural schematic view.

[0015] Figure 3 For Figure 1 The structure of the fixed groove is shown in the structural schematic view.

[0016] Figure 4 For Figure 1 The structure of the roller mechanism is shown in the structural schematic view.

[0017] Figure 5 For Figure 1 The cross-sectional structural schematic view of the buffer bin is shown.

[0018] Figure 6 For Figure 1 The cross-sectional structural schematic view of the buffer bin is shown.

[0019] Figure 7 For Figure 1 The structure of the movable block is shown in the structural schematic view.

[0020] Labels in the figure: 1, end beam; 2, buffer bin; 3, sleeve rod; 4, fixed rod; 5, spring; 6, movable block; 7, buffer block; 8, fixed groove; 9, rotating rod; 10, ratchet wheel; 11, pawl; 12, rotating groove; 13, roller; 14, connecting belt; 15, connecting hole; 16, containing bin; 17, bolt; 18, limiting ring; 19, electric push rod; 20, fixed plate. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the utility model more clear, the following will be further described in detail in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0022] The specific implementation of the utility model will be described in detail in combination with specific examples.

[0023] The utility model discloses an electric single-beam crane end beam buffer device, electric single-beam crane end beam buffer device includes: end beam 1, end beam 1 bottom fixedly connected with buffer bin 2, buffer bin 2 inside is provided with sleeve rod 3, sleeve rod 3 inside movably connected with fixed rod 4, and fixed rod 4 is provided with spring 5 in the inside, sleeve rod 3 one end is fixedly connected with movable block 6, movable block 6 one side is slidably connected with buffer block 7, and the lower surface of end beam 1 is located buffer bin 2 and is provided with fixed groove 8, and fixed groove 8 is rotatably connected with rotating rod 9 in the inside, and rotating rod 9 outer wall is fixedly connected with ratchet wheel 10, and ratchet wheel 10 below is engagedly connected with pawl 11, and end beam 1 both sides both ends are provided with rotating groove 12, and a plurality of rotating grooves 12 are provided with roller mechanisms in the inside, and buffer bin 2 bottom is provided with electric push rod 19.

[0024] It should be noted that: end beam 1 as the basis of the entire buffer structure bearing components, the bottom is fixedly connected with buffer bin 2 through firm welding. Buffer bin 2 is made of high-strength metal material, has good compression resistance and impact resistance, and provides stable installation space for the internal buffer assembly, the fixed rod 4 and the sleeve rod 3 are both hollow tubular structures, the outer diameter of the fixed rod 4 is accurately matched with the inner diameter of the sleeve rod 3, so that the fixed rod 4 can be flexibly stretched and contracted inside the sleeve rod 3, and the inside of the fixed rod 4 is ingeniously provided with a spring 5, when the sleeve rod 3 is subjected to external impact force, the spring 5 can be quickly compressed and deformed to shrink into the fixed rod 4, so as to absorb and buffer energy, thereby reducing the impact on the end beam 1, the surface of the movable block 6 is specially treated and has a low friction coefficient, one side of the movable block 6 is connected with the buffer block 7 in a T-shaped groove mode, so that the buffer block 7 can be replaced subsequently, the lower surface of the end beam 1 is accurately provided with a fixed groove 8 corresponding to the position of the buffer bin 2, the shape and size of the fixed groove 8 are matched with the ratchet wheel 10, so as to ensure the stability and rotation flexibility of the ratchet wheel 10 after installation, the ratchet wheel 10 is fixedly connected with a rotating rod 9 inside the ratchet wheel 10, the ratchet wheel 10 is engaged with a pawl 11 below, effectively prevents the reverse rotation of the ratchet wheel 10, realizes the one-way locking function, and ensures the stability and reliability of the buffer device in the working process, and the electric push rod 19 is arranged at the bottom of the buffer bin 2, so as to push the electric hoist away from the roller mechanism.

[0025] In the embodiment of the utility model, the roller mechanism includes two symmetrical rollers 13 in the rotating groove 12, the outer walls of the two rollers 13 are both sleeved with a connecting belt 14, the two rollers 13 are both rotationally connected with the rotating groove 12, the two sides of the pawl 11 are rotationally connected with the fixed groove 8 through a connecting shaft, one end of the pawl 11 penetrates the upper surface of the buffer bin 2 and abuts against the movable block 6, the two sides of the fixed groove 8 are provided with a hole through which the rotating rod 9 passes, and the two ends of the rotating rod 9 are fixedly connected with the two rollers 13 respectively.

[0026] It should be noted that: one end of the two rollers 13 near the buffer bin 2 is rotationally connected with the rotating groove 12 through a high-precision cylindrical roller bearing, and the other end is fixedly connected with the connecting rod 9, so that the synchronous fixing of the two pairs of roller mechanisms can be realized, the outer walls of the two rollers 13 are both sleeved with a connecting belt 14, the connecting belt 14 is made of high-strength rubber material, which can ensure good flexibility and sufficient strength to transmit power, the pawl 11 is rotationally connected with the fixed groove 8 through a connecting shaft, so as to fix the position of the pawl 11, and since one side of the pawl 11 abuts against the movable block 6, when the movable block 6 shrinks inward, it impacts the pawl 11, so that the pawl 11 rotates in the fixed groove 8 and is separated from the ratchet wheel 10, thereby releasing the one-way locking of the ratchet wheel 10.

[0027] In the embodiment of the utility model, the movable block 6 bottom rotatably connects with the fixed plate 14, the fixed plate 14 upper surface is equipped with the connecting hole 15, the fixed plate 14 lower surface is fixedly connected with the containing bin 16 below the connecting hole 15, the containing bin 16 inside rotatably connects with the bolt 17, the bolt 17 outer wall is fixedly connected with the limiting ring 18;

[0028] Need to explain: the bottom of movable block 6, by a set of carefully selected self-lubricating deep groove ball bearing realizes the rotary connection with fixed plate 14, its upper surface is accurately equipped with connecting hole 15, the diameter of connecting hole 15 is greater than the diameter of bolt 17 and is less than the diameter of the hole in the inside of containing bin 16, the surface of bolt 17 is welded with limiting ring 18, so that bolt 17 is clamped in containing bin 15, can only slide along containing bin 15 inside and can prevent bolt 17 from separating from containing bin 15 and being lost.

[0029] The working principle of the electric single-beam crane end beam buffer device provided by the utility model is as follows: when the electric hoist on the end beam 1 moves to the limit position, the rotating wheel of the electric hoist is pressed on the surface of the connecting belt 14, and since the ratchet wheel 10 is engaged with the pawl 11, the rotating wheel of the electric hoist cannot drive the connecting belt 14 to rotate at this time. When the electric hoist moves to the limit position and hits the buffer block 7, the buffer block 7 pushes the movable block 6, the movable block 6 pushes the sleeve rod 3, the sleeve rod 3 moves inward along the fixed rod 4, and the compression spring 5 moves inward at the same time. The impact energy can be efficiently absorbed and buffered through the contraction of the spring 5, and the impact load on the end beam 1 is greatly reduced. When the movable block 6 moves to the inside of the buffer bin 2, it hits the pawl 11, which is rotated downward through the connecting shaft and is disengaged from the ratchet wheel 10, thereby releasing the one-way locking of the ratchet wheel 10. At this time, since the electric hoist is not powered off, its rotating wheel will continue to rotate, thereby driving the rotating belt 14 to rotate in the opposite direction and driving the two rotating shafts 13 to rotate at the same time, so that the rotating wheel of the electric hoist is always rotating on the surface of the rotating belt 14. The rotating belt 14 is driven to rotate by the electric hoist, which prevents the electric hoist from continuously impacting the buffer block 7 without being powered off, thereby causing continuous damage to the end beam 1. At the same time, since the electric hoist and the connecting belt 14 directly produce opposite rotating directions, the rotating load of the electric hoist is offset, thereby preventing the motor from overloading and short-circuiting. When the operator finds the impact, the electric hoist can be pushed away from the roller mechanism area by starting the electric push rod 19, the spring 5 pushes the sleeve rod 3 to move outward, thereby pushing the movable block 6 to move outward. At this time, the pawl 11 rotates downward under the action of gravity, and the tail is rested on the surface of one side of the movable block 6, so that the pawl 11 is clamped into the ratchet wheel 10 to complete the locking.

[0030] When the buffer block 7 is damaged after experiencing multiple impacts, the bolt 17 can be rotated to disengage the bolt 17 from the threaded hole at the bottom of the movable block 6, the bolt 17 drives the limiting ring 18 to slide downward along the inside of the containing bin 16, and the bolt 17 stays in the containing bin 16, which can prevent the bolt 17 from being lost due to disengagement from the containing bin 15, at this time, the fixed plate 20 is rotated to move away from the connecting part of the buffer block 7 and the movable block 6, the buffer block 7 slides downward and disengages from the movable block 6, then a new buffer block 7 is slid into the movable block 6, and the bolt 17 is rotated into the threaded hole at the bottom of the movable block 6 to complete the replacement.

[0031] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, is also included in the patent protection range of the present application.

Claims

1. An electric single-beam crane end beam buffer device, characterized by, Include: End beam (1), the bottom of both ends is fixedly connected with buffer bin (2), two buffer bin (2) inside is provided with sleeve rod (3), sleeve rod (3) inside is movably connected with fixed rod (4), fixed rod (4) inside is provided with spring (5), sleeve rod (3) one end is fixedly connected with movable block (6), movable block (6) one side is slidably connected with buffer block (7), end beam (1) lower surface is located in the fixed slot (8) of buffer bin (2), the fixed slot (8) inside is rotatably connected with rotating rod (9), the outer wall of rotating rod (9) is fixedly connected with ratchet (10), the lower side of ratchet (10) is engaged with pawl (11), the both ends of end beam (1) are provided with rotating groove (12), a plurality of rotating groove (12) are provided with gyro wheel mechanism, buffer bin (2) bottom is provided with electric push rod (19).

2. The electrically powered single beam crane end beam bumper apparatus of claim 1, wherein, The gyro wheel mechanism includes the symmetrical rolling shaft (13) in the rotating groove (12), the outer wall of two rolling shafts (13) is sleeved with connecting belt (14), and two rolling shafts (13) are rotatably connected with rotating groove (12).

3. The electrically powered single beam crane end beam bumper apparatus of claim 2, wherein, The movable block (6) bottom rotatably connected with fixed plate (20), the fixed plate (20) upper surface is provided with connecting hole (15), the fixed plate (20) lower surface is fixedly connected with containing bin (16) below connecting hole (15), the containing bin (16) inside is movably connected with bolt (17), and the outer wall of bolt (17) is fixedly connected with limit ring (18).

4. The electrically powered single beam crane end beam bumper apparatus of claim 3, wherein, The fixed slot (8) both sides are provided with the hole for rotating rod (9) to pass through, and the both ends of rotating rod (9) are fixedly connected with two rolling shafts (13) respectively.

5. The electrically powered single beam crane end beam bumper apparatus of claim 4, wherein, The both sides of pawl (11) are rotatably connected with fixed slot (8) through connecting shaft.

6. The electrically powered single beam crane end beam bumper apparatus of claim 5, wherein, One end of pawl (11) penetrates the upper surface of buffer bin (2) and abuts with movable block (6).

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