CN219971651U - Grab bucket driving limiting device - Google Patents

Abstract

The utility model belongs to the technical field of cranes, and discloses a grab bucket crane limiting device which comprises a base, wherein the base is fixedly arranged on a grab bucket crane main frame between two steel wire rope reels, the top and the bottom of the base are respectively provided with a limiting mechanism and a telescopic shaft structure, the bottom of the telescopic shaft structure is fixedly provided with a horizontal buffer device, the limiting mechanism comprises a flange guide sleeve, and the flange guide sleeve is fixedly connected to the top of the base through bolts.

Description

Grab bucket driving limiting device

Technical Field

The utility model relates to the technical field of cranes, in particular to a grab bucket traveling crane limiting device.

Background

The grab bucket crane is also called a crane, is important heavy object transferring equipment and is used for lifting heavy objects to a specified height, and the heavy objects move to a specified position in a plane to realize the operation of materials in a three-dimensional space, so that the manpower is saved, the operation speed is improved, the crane upper limit is a device for limiting the lifting height of the grab bucket of the crane, is also an important safety component of the crane, and is inevitably abnormal in the use process of the crane, so that the grab bucket of the crane is pushed against, serious equipment accidents occur, and serious safety threats are brought to people and equipment.

In order to transport concentrate products, 4 grab bucket cranes are used for a long time and high frequency at present, the mine products mainly comprise gold, copper ore and the like, and firstly, a concentrate pool is often required to store a large amount of concentrate due to the influence of price fluctuation, so that the grab bucket cranes are often operated at a higher position. Secondly, concentrate pond is very long, very wide, and there is a loading lane still on concentrate pond wall edge, and in order to be convenient for transport concentrate, grab bucket crane main frame is very long, and the operation goods is heavy, leads to grab bucket crane main frame amplitude about the service braking back big, the crane grab bucket rocks greatly about, and the grab bucket is because various factors in the use, grab bucket top surface levelness hardly controls, the travelling car compact structure at grab bucket crane wire rope reel place, and stopper mounted position maintenance is very inconvenient. The upper limit of the grab bucket running machine is frequently damaged in the use process, so that a plurality of steel wire ropes are wound and damaged, the grab bucket roof-falling equipment accidents are caused, and great trouble is brought to the aspects of mine safety production, equipment efficiency operation, maintenance cost and the like.

The mine is first tried to use a steel wire rope weight hanging limiting mechanism, and the weight limiting mechanism mainly adopts two mounting modes, namely, the weight is directly hung to a set limiting position, and the weight is sleeved on the steel wire rope. The heavy hammer is directly hung, the heavy hammer is often more severely rocked due to rocking caused by driving movement, a limiting mechanism is frequently in misoperation, a steel wire rope and a travel switch guide arm are often damaged, the heavy hammer is often dropped, and the like, so that great trouble is brought to safe production and efficient production. When the heavy hammer sleeve is sleeved on the steel wire rope, the grab bucket crane is opened and closed, the steel wire rope is lifted to move up and down along with the grab bucket, the heavy hammer sleeve is often rolled into the steel wire rope roller along with the steel wire rope or is worn sharply, the limiting mechanism and the heavy hammer are damaged, the steel wire rope is derailed, and more serious potential safety hazards and production accidents are brought to production. The actual use effect of the steel wire rope weight hanging device in the mine is extremely poor, the maintenance and use cost of the grab bucket crane is seriously increased, and the use efficiency of the grab bucket crane is extremely low.

Secondly, an attempt is made to use a multifunctional travel limiter, the principle of the multifunctional travel limiter is that a steel wire rope roller is utilized to drive a limiter worm to synchronously rotate, a limiting mechanism is arranged on the worm, the limiting mechanism comprises a cam on the worm and a travel switch electrically connected with a steel wire rope roller driving motor, and the worm realizes the calculation and limiting functions by touching and pressing the travel switch through the cam on the number of revolutions of the steel wire rope roller. Firstly, the limiter is required by concentricity of connection with a steel wire rope roller, the concentricity can not meet the requirement often due to various reasons, the stress is uneven, the abrasion is serious, the connecting rod is broken frequently, and the limiter fails. Secondly, the limiter is frequently replaced when the connecting rod is broken, and the steel wire rope is frequently replaced due to the fact that the mine grab bucket crane is frequently used, the cam of the limiter is required to be adjusted every time when the steel wire rope is replaced, and because the use height of the mine grab bucket crane is not high, in order to achieve the purpose of controlling upper limit, the cam precision is required to be adjusted to achieve very high requirements, the cam is mainly adjusted by a user according to experience, the accuracy depends on the experience of the user, the upper limit accuracy is difficult to be controlled, the limiter is frequently damaged and the steel wire rope is frequently replaced, and the use and maintenance cost of the crane is extremely high.

Disclosure of Invention

The utility model aims to solve the problems of the prior art and provides the grab bucket traveling crane limiting device which has the advantages of firm and reliable device, difficult falling, low requirement on use space, convenient operation, good control effect and the like, and effectively solves the technical problems.

The utility model is realized in the following way:

the utility model provides a grab bucket crane stop device, includes the base, base fixed mounting is on grab bucket crane main frame between two wire rope reels, base top and bottom are provided with stop gear and telescopic shaft structure respectively, telescopic shaft structure's bottom fixed mounting has horizontal buffer, stop gear includes the flange uide bushing, the flange uide bushing pass through bolt fastening connect in the top of base, the top of flange uide bushing passes through bolt fastening connect with the flange shield, the top of base just is located flange uide bushing inside central part is connected with first linear bearing through bolt fastening, flange uide bushing's bottom central authorities are connected with second linear bearing through bolt fastening, flange uide bushing's right side is followed vertical direction and is had first nearly probe hole and second nearly probe hole in proper order, flange uide bushing's right side just corresponds first nearly probe hole and second nearly probe hole punishment do not fixed mounting have first nearly switch and second nearly switch;

the telescopic shaft structure comprises a flange spring sleeve, the flange spring sleeve is connected to the bottom of the base through bolt fastening, a main shaft is movably connected to the inside of the flange spring sleeve, a first gasket and a third gasket are sleeved on the position, close to the top and the middle, of the main shaft respectively, a second gasket is fixedly connected to the surface of the main shaft and the position, located in the middle, of the inside of the flange spring sleeve, an upper spring is sleeved between the first gasket and the second gasket, a lower spring is sleeved between the surface of the main shaft and the second gasket and the third gasket, a horizontal buffer device is fixedly connected to the bottom of the main shaft, and the top and the bottom of the main shaft are respectively connected to the inside of the first linear bearing and the second linear bearing in a sliding mode and extend into the inside of the flange spring sleeve.

In one embodiment of the utility model, the horizontal buffer device comprises a T-shaped screw, the T-shaped screw is in threaded connection with the bottom of the main shaft, a locking nut is in threaded connection with the surface of the T-shaped screw, the bottom of the telescopic dust cover is fixedly connected with the bottom end of the main shaft through the locking nut, a universal bearing is clamped at the bottom of the T-shaped screw, the universal bearing is fixedly connected with the T-shaped screw through the T-shaped nut, and a plurality of universal wheels are uniformly arranged at the bottom of the universal bearing.

In one embodiment of the utility model, the second linear bearing is fixedly connected with the top end of the telescopic dust cover, the surface of the T-shaped screw is in threaded connection with a locking nut, and the bottom of the telescopic dust cover is fixedly connected with the bottom end of the main shaft through the locking nut.

In one embodiment of the present utility model, the first proximity switch is electrically connected to the audible and visual alarm.

Compared with the prior art, the utility model has the beneficial effects that:

the device has the advantages of simple and reasonable structure, firm and reliable device, difficult falling off, low requirement on use space, automatic control, convenient operation, good control effect, easy manufacture, low price, convenient installation and disassembly, small site limitation, firmness and durability, extremely low manufacturing and maintenance use cost, simple maintenance and reduced requirement on the operation capability of maintenance personnel.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of the full broken plane structure of the present utility model.

Reference numerals illustrate: 1. a limiting mechanism; 11. a blue dust cap; 12. a first proximity switch; 13. a second proximity switch; 14. a flange guide sleeve; 141. a first access probe; 142. a second proximity probe; 15. a first linear bearing; 2. a base; 3. a telescopic shaft structure; 31. a flange spring sleeve; 32. a first gasket; 33. a spring is arranged; 34. a second gasket; 35. a lower spring; 36. a third gasket; 37. a second linear bearing; 38. a main shaft; 4. a retractable dust cover; 5. a horizontal buffer device; 51. a T-shaped screw; 52. a lock nut; 53. a universal bearing; 54. a T-nut 54; 55. and a universal wheel.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, based on the embodiments of the utility model, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

Examples

Referring to fig. 1, the utility model provides a grab bucket crane limit device, which comprises a base 2, wherein the base 2 is fixedly arranged on a grab bucket crane main frame between two steel wire rope drums, a limit mechanism 1 and a telescopic shaft structure 3 are respectively arranged at the top and the bottom of the base 2, a horizontal buffer device 5 is fixedly arranged at the bottom of the telescopic shaft structure 3, the limit mechanism 1 comprises a flange guide sleeve 14, the flange guide sleeve 14 is connected to the top of the base 2 through bolt fastening, the top of the flange guide sleeve 14 is connected with a flange dust cover 11 through bolt fastening, the top of the base 2 is connected with a first linear bearing 15 at the center inside the flange guide sleeve 14 through bolt fastening, the center of the bottom of the flange guide sleeve 14 is connected with a second linear bearing 37 through bolt fastening, a first proximity probe hole 141 and a second proximity probe hole 142 are sequentially formed at the right side of the flange guide sleeve 14 along the vertical direction, and a first proximity switch 12 and a second proximity switch 13 are respectively and fixedly arranged at the right side of the flange guide sleeve 14 corresponding to the first proximity probe hole 141 and the second proximity probe hole 142;

the telescopic shaft structure 3 comprises a flange spring sleeve 31, the flange spring sleeve 31 is fixedly connected to the bottom of the base 2 through bolts, a main shaft 38 is movably connected to the inside of the flange spring sleeve 31, a first gasket 32 and a third gasket 36 are sleeved on the position, close to the top and the middle, of the main shaft 38, a second gasket 34 is fixedly connected to the surface of the main shaft 38 and the middle of the inside of the flange spring sleeve 31, an upper spring 33 is sleeved on the surface of the main shaft 38 and between the first gasket 32 and the second gasket 34, a lower spring 35 is sleeved on the surface of the main shaft 38 and between the second gasket 34 and the third gasket 36, a horizontal buffer device 5 is fixedly connected to the bottom of the main shaft 38, and the top and the bottom of the main shaft 38 are respectively and slidably connected to the inside of the first linear bearing 15 and the second linear bearing 37 and extend into the flange spring sleeve 31.

In one embodiment of the present utility model, further, the horizontal buffering device 5 includes a T-shaped screw 51, the T-shaped screw 51 is screwed on the bottom of the main shaft 38, a lock nut 52 is screwed on the surface of the T-shaped screw 51, the bottom of the telescopic dust cover 4 is fixedly connected to the bottom end of the main shaft 38 through the lock nut 52, a universal bearing 53 is clamped on the bottom of the T-shaped screw 51, the universal bearing 53 is fixedly connected with the T-shaped screw 51 through a T-shaped nut 54, and a plurality of universal wheels 55 are uniformly arranged on the bottom of the universal bearing 53.

Specifically, in order to overcome the problem of large amplitude of the main frame of the crane, a device which is firm in installation, simple in structure and free from relative movement with the main frame of the crane and transmits the height position signal of the crane grab bucket by virtue of the main shaft 38 is required to be designed, wherein the limit mechanism 1 is designed as a base 2 with a threaded bottom plate and a limiter, the limit mechanism 1 is firmly and reliably ensured by being fixed on the main frame of the crane of the grab bucket between two steel wire rope drums in parallel by bolts, the relative movement of the limit mechanism 1 and the main frame of the crane is avoided, a flange type first linear bearing 15 is fixedly arranged above the base 2, a flange guide sleeve 14 made of nylon material is designed above the flange type first linear bearing 15, the main shaft 38 is ensured to move according to a design route by virtue of the first linear bearing 15 and the flange guide sleeve 14, the false action of a proximity switch is avoided by virtue of wear-resistant nylon sleeves or engineering plastics, the flange guide sleeve 14 is provided with a switch mounting bracket and two first proximity switches 12 and two second proximity switches 13, a first proximity probe hole 141 and a second proximity probe hole 142 are formed at the position of the flange guide sleeve 14 corresponding to the proximity switches, the top of the flange guide sleeve 14 is plugged through a dust cover, the proximity switches are activated through the up-and-down movement of the main shaft 38, the two proximity switches are designed and mounted to play a double-insurance role, the function of monitoring whether the first proximity switch 12 is damaged or not is achieved, the shaft stops between the first proximity switch 12 and the second proximity switch 13 in normal operation, the first proximity switch 12 is not activated in proximity, when the second proximity switch 13 is damaged and out of control, the shaft lifting height is increased, after the first proximity switch 12 is activated, the power supply of the wire rope reel is disconnected, and an audible and visual alarm is used for an operation room, the upper spring 33 and the lower spring 35 are separated by fixedly arranging the second gasket 34 at the middle section of the upper part of the main shaft 38 positioned in the flange spring sleeve 31, the lower part of the lower spring 35 is prevented from falling off from the bottom of the flange spring sleeve 31 by the blocking of the third gasket 36, meanwhile, the upper spring 33 has the function of relieving the impact on the limiting mechanism 1 in the ascending process of the grab bucket and rapidly rebounding the main shaft 38 when the grab bucket descends, the lower spring 35 has the function of reducing the impact on the flange spring sleeve 31 by the main shaft 38 when the main shaft 38 is rebounded, thereby reducing the damage of the main shaft 38 to the flange spring sleeve 31, the second linear bearing 37 and the telescopic dust cover 4 are locked to the bottom of the flange spring sleeve 31 by virtue of bolts, the telescopic dust cover 4 plays the role of protecting the cleaning of the main shaft 38, effectively prolonging the service life of the main shaft 38, the first linear bearing 15 and the second linear bearing 37 ensure that the main shaft 38 is in a linear motion state, the lower part of the main shaft 38 is designed to be hollow, the shaft head is provided with partial threads and is used for adjusting the length of the T-shaped screw rod 51 so as to control the upper limit of the grab bucket to be in a set position, the flange-type telescopic dust cover 4 and the T-shaped bolt are fastened on the shaft head through the locking nut 52, so that dust and the like are prevented from entering the main shaft 38, the lower part of the T-shaped screw rod 51 is connected with the universal bearing 53 by means of the T-shaped nut 54, the universal bearing 53 is circular and convenient for flexible motion, three industrial universal wheels 55 are arranged below the universal bearing 53, the universal wheels 55 are distributed according to an equilateral triangle, so that the stress of the universal wheels 55 is more uniform, the connection is more firm and reliable, the universal bearing 53 and the universal wheels 55 are designed to reduce the shaking of the grab bucket and the uneven top surface, when the grab bucket is contacted with the main shaft 38 and ascends, the main shaft 38 receives horizontal impact force, so that the probability of damaging the limiting mechanism 1 when the main shaft 38 is bent is reduced;

through the structure setting of this device, avoided the shortcoming of weight stop device and multi-functional stroke stopper, reduced the change frequency, reduced maintenance personnel's intensity of labour, reduced equipment purchase and operation maintenance cost, improved equipment availability factor, this device simple structure is reasonable, the device is firm reliable, be difficult for droing, the space requirement of use is low, can realize automatic control, convenient operation and control are effectual, easy manufacture, the low price, the installation is dismantled conveniently, the place restriction is little, sturdy and durable, the cost of manufacture, maintenance use is extremely low, it is simple to maintain, the requirement to maintenance personnel's operation ability has been reduced.

In one embodiment of the present utility model, further, the second linear bearing 37 is fixedly connected to the top end of the telescopic dust cover 4, the surface of the T-shaped screw 51 is screwed with a locking nut 52, and the bottom of the telescopic dust cover 4 is fixedly connected to the bottom end of the main shaft 38 through the locking nut 52.

In one embodiment of the present utility model, further, the first proximity switch 12 is electrically connected to the audible and visual alarm.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (4)

1. The grab bucket traveling crane limiting device is characterized by comprising a base (2), wherein the base (2) is fixedly arranged on a grab bucket traveling crane main frame between two steel wire rope reels, a limiting mechanism (1) and a telescopic shaft structure (3) are respectively arranged at the top and the bottom of the base (2), a horizontal buffer device (5) is fixedly arranged at the bottom of the telescopic shaft structure (3), the limiting mechanism (1) comprises a flange guide sleeve (14), the flange guide sleeve (14) is fixedly connected to the top of the base (2) through bolts, a flange dust cover (11) is fixedly connected to the top of the flange guide sleeve (14) through bolts, a first linear bearing (15) is fixedly connected to the top and the bottom center of the flange guide sleeve (14) through bolts, a first proximity hole (141) and a second proximity hole (142) are sequentially formed in the right side of the flange guide sleeve (14) along the vertical direction, and a first proximity switch (12) and a second proximity switch (142) are fixedly connected to the top of the flange guide sleeve (14) through bolts;

the telescopic shaft structure (3) comprises a flange spring sleeve (31), the flange spring sleeve (31) is connected to the bottom of the base (2) through bolt fastening, a main shaft (38) is movably connected to the inside of the flange spring sleeve (31), a first gasket (32) and a third gasket (36) are sleeved on the position, close to the top and the middle, of the main shaft (38) respectively, a second gasket (34) is fixedly connected to the surface of the main shaft (38) and the middle of the inside of the flange spring sleeve (31), an upper spring (33) is sleeved on the surface of the main shaft (38) between the first gasket (32) and the second gasket (34), a lower spring (35) is sleeved on the surface of the main shaft (38) between the second gasket (34) and the third gasket (36), a horizontal buffer device (5) is fixedly connected to the bottom of the main shaft (38), and the top and the bottom of the main shaft (38) are respectively and slidably connected to the first linear bearing (15) and the second linear bearing (37) respectively, and the second linear bearing (37) stretches into the flange sleeve (31).

2. The grab bucket traveling crane limiting device according to claim 1, wherein the horizontal buffer device (5) comprises a T-shaped screw (51), the T-shaped screw (51) is in threaded connection with the bottom of the main shaft (38), a universal bearing (53) is clamped at the bottom of the T-shaped screw (51), the universal bearing (53) is fixedly connected with the T-shaped screw (51) through a T-shaped nut (54), and a plurality of universal wheels (55) are uniformly arranged at the bottom of the universal bearing (53).

3. The grab bucket traveling crane limiting device according to claim 2, wherein the second linear bearing (37) is fixedly connected with the top end of the telescopic dust cover (4), a locking nut (52) is connected to the surface of the T-shaped screw (51) in a threaded manner, and the bottom of the telescopic dust cover (4) is fixedly connected with the bottom end of the main shaft (38) through the locking nut (52).

4. A grapple travel stop according to claim 3, characterized in that the first proximity switch (12) is electrically connected to an audible and visual alarm.