Four-outlet rope winding electric hoist and crane

Abstract

The four-outlet rope winding electric hoist comprises a supporting assembly and a hoisting assembly, the supporting assembly comprises a supporting cross beam and a balancing frame, and the balancing frame is arranged at the bottom of one side of the supporting cross beam; the hoisting assembly comprises four steel wire ropes, a winding drum and a wheel carrier, the winding drum is arranged on the side, away from the balancing frame, of the supporting cross beam and axially arranged in the length direction of the supporting cross beam, and the two ends of the four steel wire ropes are connected with the winding drum and the balancing frame correspondingly; four pulleys are arranged on the wheel carrier side by side, and four groups of steel wire ropes are respectively arranged in the four pulleys in a penetrating manner; hooks are arranged at the bottoms of the wheel carriers. The single fault of steel wire rope breakage is solved through the four-outlet rope winding electric hoist, and the whole device is uniform in stress, stable in operation and capable of vertically rising and falling when an object is hoisted. And even if one steel wire rope is broken, the whole device can still run only by taking off the broken steel wire rope, so that the production efficiency and the reliability are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a four-rope winding electric hoist and a crane. Background Art

[0002] Electric hoist is one of the important equipment for material handling and is widely used in various links of industrial production. As a special equipment, the safety of the hoist is the top priority of the design work. Wire rope is a flexible part widely used in cranes. The wire rope is wound on the drum. The release and recovery of the wire rope are controlled by the forward and reverse rotation of the drum. The wire rope passes through various combinations of pulleys to form a rope winding method with different ratios. Therefore, in the working process of the electric hoist, the wire rope plays a vital role.

[0003] In some cases, the crane may be subjected to some special loads, which refer to the loads that occur under special circumstances when the crane is not working properly or not working. For example, improper operation by the staff, tilted lifting, frequent overload work, etc. may cause a wire rope to break. As electric hoists are increasingly used in industrial production, people have put forward higher requirements for the performance of electric hoists, requiring that even if a wire rope breaks, the hoist can still operate normally without heavy objects falling, and at the same time it will not affect the short-term use of the electric hoist, there is enough time to replace the wire rope, and the production work will not be affected by the unavailability of the equipment. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defects in the prior art that the hoist cannot operate due to wire breakage, resulting in low reliability and production efficiency.

[0005] In order to solve the above technical problems, the utility model provides a four-rope winding electric hoist, comprising:

[0006] A support assembly, the support assembly comprising a support beam and a balance frame, the balance frame being arranged at the bottom of one side of the support beam;

[0007] A hoisting assembly, the hoisting assembly includes four groups of steel wire ropes, a drum and a wheel frame, the drum is arranged on the side of the supporting beam away from the balancing frame, the drum is axially arranged along the length direction of the supporting beam, the two ends of the four groups of steel wire ropes are respectively connected to the drum and the balancing frame; four pulleys are arranged side by side on the wheel frame, the four groups of steel wire ropes are respectively passed through the four pulleys; a hook is arranged at the bottom of the wheel frame.

[0008] In one embodiment of the utility model, the balance frame includes a first balance plate, a second balance plate, a suspension shaft and a suspension ring which are arranged in parallel. The suspension shaft passes through one end of the first balance plate and the second balance plate. The first balance plate and the second balance plate are respectively hinged with two first rope clamps and two second rope clamps at one end away from the suspension shaft; one end of the suspension ring is hinged to the suspension shaft, and the other end of the suspension ring is connected to the supporting beam.

[0009] In one embodiment of the present invention, the distance between the two first rope clamps is smaller than the distance between the two second rope clamps.

[0010] In one embodiment of the utility model, a rope guide is sleeved on the drum, and the wire rope passes through the rope guide and is connected to the drum.

[0011] In one embodiment of the utility model, the drum surface has a plurality of rope clamping grooves along the axial direction, and the steel wire rope is clamped in the rope clamping grooves.

[0012] In one embodiment of the utility model, a fixed beam is provided at the bottom of the wheel frame, the hook is inserted into the fixed beam, and a bearing is provided between the hook and the fixed beam.

[0013] In one embodiment of the utility model, a stopper is provided at the opening of the hook, and the stopper is connected to the hook by a pin.

[0014] In one embodiment of the utility model, a driving source is provided on a side of the supporting crossbeam close to the reel, and an output end of the driving source is connected to the reel.

[0015] A crane comprises the four-rope winding electric hoist.

[0016] The above technical solution of the utility model has the following advantages compared with the prior art:

[0017] The utility model discloses a four-rope winding electric hoist and a crane, which solves the single fault of wire rope breakage through the four-rope winding electric hoist. The whole device is evenly stressed and operates smoothly. When hoisting objects, it can rise and fall vertically. Even if one wire rope breaks, the whole device can still operate by removing the broken wire rope, thereby improving production efficiency and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein

[0019] Figure 1 It is a side view of the overall structure of the utility model;

[0020] Figure 2 This is the overall structural front view of the utility model;

[0021] Figure 3 for Figure 2 The structural front view of the middle balance frame;

[0022] Figure 4 for Figure 2 The structural side view of the middle balance frame;

[0023] Figure 5 for Figure 2 The structural front view of the middle hook;

[0024] Figure 6 for Figure 2 The structural side view of the middle hook;

[0025] Figure 7 for Figure 2 Structural cross-sectional view of the middle reel;

[0026] Explanation of the reference numerals in the specification: 1. Support assembly; 2. Lifting assembly; 3. Driving source; 11. Support beam; 12. Balance frame; 21. Wire rope; 22. Drum; 23. Wheel frame; 24. Hook; 25. Rope guide; 121. First balance plate; 122. Second balance plate; 123. Hanging shaft; 124. Lifting ring; 125. First rope clamp; 126. Second rope clamp; 221. Rope clamping groove; 231. Fixed beam; 232. Bearing; 241. Stop block. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0028] Reference Figure 1-Figure 7 As shown, the utility model discloses a four-rope winding electric hoist, comprising:

[0029] A support assembly 1, the support assembly 1 comprising a support beam 11 and a balance frame 12, the balance frame 12 being arranged at the bottom of one side of the support beam 11;

[0030] The hoisting assembly 2 includes four groups of steel wire ropes 21, a drum 22 and a wheel frame 23. The drum 22 is arranged on the side of the supporting beam 11 away from the balancing frame 12. The drum 22 is axially arranged along the length direction of the supporting beam 11. The two ends of the four groups of steel wire ropes 21 are respectively connected to the drum 22 and the balancing frame 12; four pulleys are arranged side by side on the wheel frame 23, and the four groups of steel wire ropes 21 are respectively inserted into the four pulleys; a hook 24 is arranged at the bottom of the wheel frame 23.

[0031] In the above structure, the balance frame 12 and the drum 22 are respectively installed on both sides of the supporting beam 11, and the supporting beam 11 and the balance frame 12 are connected by the wire rope 21, and the hook 24 is arranged on the wire rope 21. Specifically, the wire rope 21 in the utility model is provided with four groups, and four pulleys are arranged side by side in the wheel frame 23 equipped on the hook 24, and each wire rope 21 is wound around a pulley, and the pulley here is a movable pulley. The wire rope 21 is fixedly connected to one end of the balance frame 12, and the drum 22 rotates to wind the wire rope 21 around the drum, and the hook 24 at the bottom realizes the lifting action. During use, the drum 22 rotates to drive the four wire ropes 21 to move synchronously. When the load at the bottom of the hook 24 is overweight, it is easy to cause the wire rope 21 to break; specifically, during the hoisting process, if one of the wire ropes 21 breaks, there are still three remaining wire ropes 21 to ensure the normal hoisting. Since four groups of steel wire ropes 21 are used for synchronous hoisting in the utility model, in order to improve the stability during the hoisting process, the balance frame 12 arranged at the bottom of the supporting beam 11 is used to ensure the balance and synchronization of the multiple steel wire ropes 21.

[0032] The four-rope winding electric hoist in the utility model has uniform force on the whole device, stable operation, and can be lifted and lowered vertically when hoisting objects. Compared with the two-rope multiplier, each wire rope 21 is subjected to half the force, and the wire rope 21 is more durable and not easy to break. However, even if one wire rope 21 breaks, the whole device can still operate by simply removing the broken wire rope 21. If one of the two-rope multiplier winding ropes breaks, the whole device cannot be used, and it must wait until a new wire rope 21 is replaced before it can be used again. The whole maintenance takes a long time. At the same time, the four-rope multiplier winding method has greatly improved the safety compared to the traditional two-rope multiplier winding method. Because the force on the wire rope 21 is halved, the risk of fatigue breakage is greatly reduced. Even if the wire rope 21 breaks in extreme cases, it will not have the risk of heavy objects falling like the two-rope multiplier winding method, thus avoiding damage to personal and property safety.

[0033] Furthermore, the balancing frame 12 includes a first balancing plate 121, a second balancing plate 122, a suspension shaft 123 and a suspension ring 124 arranged in parallel, the suspension shaft 123 is arranged through one end of the first balancing plate 121 and the second balancing plate 122, and two first rope clamps 125 and two second rope clamps 126 are respectively hinged to one end of the first balancing plate 121 and the second balancing plate 122 away from the suspension shaft 123; one end of the suspension ring 124 is hinged to the suspension shaft 123, and the other end of the suspension ring 124 is connected to the supporting crossbeam 11. The distance between the two first rope clamps 125 is smaller than the distance between the two second rope clamps 126.

[0034] Specifically, the first balance plate 121 and the second balance plate 122 are arranged in parallel and are both mounted on the hanging shaft 123. The first balance plate 121 and the second balance plate 122 can rotate around the hanging shaft 123 for balance adjustment. Secondly, a pair of first rope clamps 125 and a pair of second rope clamps 126 are respectively arranged on both sides of the bottom of the first balance plate 121 and the second balance plate 122. The first rope clamp 125 and the second rope clamp 126 are respectively hinged to the first balance plate 121 and the second balance plate 122.

[0035] The four groups of steel wire ropes 21 are arranged in pairs, separated by the first balance plate 121 and the second balance plate 122 of different widths. The entire balance frame 12 is arranged at one end of the fixed point, and the balance is adjusted by two symmetrical first rope clamps 125 and two symmetrical second rope clamps 126. Secondly, the first balance plate 121 and the second balance plate 122 can be rotated around the suspension shaft 123 for balance adjustment to compensate for the problem that the steel wire ropes 21 may have different lengths. The fixed rope end adopts a balance beam device for adjustment, and the hook 24 can be adjusted to be vertical without skewing.

[0036] Furthermore, a rope guide 25 is sleeved on the drum 22 , and the steel wire rope 21 passes through the rope guide 25 and is connected to the drum 22 .

[0037] Specifically, two rope guides 25 are provided, each of which has two sets of rope outlets, and two sets of steel wire ropes 21 are synchronously wound on the drum 22. Secondly, according to the different winding directions, the rope guides 25 are divided into left-handed rope guides 25 and right-handed rope guides 25.

[0038] Furthermore, a plurality of rope-holding grooves 221 are formed on the surface of the drum 22 along the axial direction, and the steel wire rope 21 is held in the rope-holding grooves 221 .

[0039] As a preferred solution of the utility model, the rope groove 221 of the drum 22 is a double-start thread, and its lead = 2x pitch. Such a groove can make two steel wire ropes 21 wound side by side on the drum 22, making the structure more compact. In order to make the rope arrangement smooth, the thread groove on the rope guide 25 matches the drum 22, which is also a double-start thread and expands the rope outlet.

[0040] Further, a fixing beam 231 is provided at the bottom of the wheel frame 23, the hook 24 is inserted into the fixing beam 231, and a bearing 232 is provided between the hook 24 and the fixing beam 231. Specifically, one end of the hook 24 connected to the wheel frame 23 is connected through the bearing 232, so that the hook 24 can rotate by itself.

[0041] Furthermore, a stopper 241 is provided at the opening of the hook 24, and the stopper 241 is connected to the hook 24 with a pin. Specifically, during the hoisting process, after the hoisting rope is put into the hook 24, the stopper 241 blocks the opening of the hook 24. As a preferred solution of the utility model, an elastic element is provided between the stopper 241 and the hook 24 to realize automatic resetting of the stopper 241.

[0042] Furthermore, a driving source 3 is provided on one side of the supporting beam 11 close to the drum 22, and an output end of the driving source 3 is connected to the drum 22; specifically, the driving source 3 rotates to drive the entire drum 22 to rotate, winding and releasing the wire rope 21, thereby realizing the lifting and lowering of the hook 24.

[0043] Embodiment 2

[0044] A crane comprises the four-rope winding electric hoist described in the first embodiment.

[0045] In summary, the utility model introduces a four-rope winding electric hoist and crane. The four-rope winding electric hoist in the utility model is mainly used to solve the single fault of the broken wire rope 21. It not only has the characteristics of two-rope winding, but also the whole device is evenly stressed and runs smoothly, and can lift and lower vertically when hoisting objects. Compared with the two-rope multiplier, each of its wire ropes 21 is subjected to half the force, and the wire ropes 21 are more durable and not easy to break. Even if one of the wire ropes 21 breaks, only the broken wire rope 21 needs to be removed, and the whole device can still operate. If one of the two-rope multiplier winding ropes breaks, the whole device cannot be used, and it must wait until a new wire rope 21 is replaced before it can continue to be used. The entire maintenance takes a long time. At the same time, the four-rope ratio winding method has greatly improved safety compared to the traditional two-rope ratio winding method. Since the force on the wire rope 21 is halved, the risk of fatigue breakage is greatly reduced. Even if the wire rope 21 breaks in extreme cases, there will be no risk of heavy objects falling like the two-rope ratio winding method, thus avoiding damage to personal and property safety.

[0046] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A four-rope electric hoist, characterized in that: include: A support assembly, the support assembly comprising a support beam and a balance frame, the balance frame being arranged at the bottom of one side of the support beam; A hoisting assembly, the hoisting assembly includes four groups of steel wire ropes, a drum and a wheel frame, the drum is arranged on the side of the supporting beam away from the balancing frame, the drum is axially arranged along the length direction of the supporting beam, the two ends of the four groups of steel wire ropes are respectively connected to the drum and the balancing frame; four pulleys are arranged side by side on the wheel frame, the four groups of steel wire ropes are respectively passed through the four pulleys; a hook is arranged at the bottom of the wheel frame.

2. The four-rope electric hoist according to claim 1, characterized in that: The balance frame includes a first balance plate, a second balance plate, a suspension shaft and a suspension ring which are arranged in parallel. The suspension shaft passes through one end of the first balance plate and the second balance plate. The ends of the first balance plate and the second balance plate away from the suspension shaft are respectively hinged to two first rope clamps and two second rope clamps; one end of the suspension ring is hinged to the suspension shaft, and the other end of the suspension ring is connected to the supporting beam.

3. The four-rope electric hoist according to claim 2, characterized in that: The distance between the two first rope clamps is smaller than the distance between the two second rope clamps.

4. The four-rope electric hoist according to claim 1, characterized in that: A rope guide is sleeved on the drum, and the steel wire rope passes through the rope guide and is connected with the drum.

5. The four-rope electric hoist according to claim 1, characterized in that: The drum surface is provided with a plurality of rope clamping grooves along the axial direction, and the steel wire rope is clamped in the rope clamping grooves.

6. The four-rope electric hoist according to claim 1, characterized in that: A fixed beam is arranged at the bottom of the wheel frame, the hook is inserted into the fixed beam, and a bearing is arranged between the hook and the fixed beam.

7. The four-rope electric hoist according to claim 6, characterized in that: A stopper is arranged at the opening of the hook, and the stopper is connected to the hook with a pin shaft.

8. The four-rope electric hoist according to claim 1, characterized in that: A driving source is arranged on one side of the supporting crossbeam close to the reel, and an output end of the driving source is connected to the reel.

9. A crane, characterized in that: It comprises a four-rope electric hoist as described in any one of claims 1-8.

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