CN219526054U - Device for controlling axial clearance in screwing process of large nut - Google Patents

Abstract

The utility model discloses a device for controlling axial clearance in the screwing process of a large nut, which comprises a lifting hook, a first chain block, a second chain block, a steel wire rope and lifting screws, wherein the top of the lifting hook is hung on the hook head of an overhead crane, the tops of the first chain block and the second chain block are both hung at the bottom of the lifting hook, three lifting screws are circumferentially and uniformly distributed on the upper end surface of the large nut, two lifting screws are connected through one steel wire rope, the bottom of the first chain block is connected with the steel wire rope, and the bottom of the second chain block is connected with the other independent lifting screw, so that the large nut is always kept horizontal. The utility model not only can effectively control the axial clearance of the screw thread in the screwing process of the large-sized nut, but also can avoid the grinding damage of the nut caused by zero clearance at the lower part, ensures the screwing efficiency and quality of the large-sized nut, and improves the integral screwing efficiency.

Description

Device for controlling axial clearance in screwing process of large nut

Technical Field

The utility model belongs to the technical field of heavy machinery assembly, and particularly relates to a device for controlling axial clearance in a large nut screwing process.

Background

In heavy machinery assembly, the screw thread size has a specification of M400 or more and a weight of 2T or more. The existing method only uses an overhead crane to hoist the nut to eliminate the influence of the gravity of the nut on the axial clearance of the screw thread, and uses external force such as a hydraulic spanner, manual rotation and the like to screw the nut and the screw. However, the screwing method can not be perfectly matched with the hoisting and screwing of the crown block, so that the axial clearance of the screw thread is free from clearance at the lower side due to gravity, and screw thread grinding damage can be easily caused if the screwing is carried out by continuously applying force.

Disclosure of Invention

The utility model provides a device for controlling the axial clearance in the screwing process of a large-sized nut, which can not only effectively control the axial clearance of the screw thread in the screwing process of the large-sized nut, but also avoid the grinding damage of the nut caused by zero clearance at the lower part, thereby ensuring the screwing efficiency and quality of the large-sized nut and improving the overall screwing efficiency.

The utility model discloses a device for controlling axial clearance in a screwing process of a large-sized nut, which comprises a lifting hook, a first chain block, a second chain block, a steel wire rope and lifting screw, wherein the top of the lifting hook is hung on the hook head of an overhead crane, the tops of the first chain block and the second chain block are both hung at the bottom of the lifting hook, three lifting screw are circumferentially and uniformly distributed on the upper end surface of the large-sized nut, two lifting screw are connected through one steel wire rope, the bottom of the first chain block is connected with the steel wire rope, and the bottom of the second chain block is connected with another independent lifting screw, so that the large-sized nut is always kept horizontal.

In the above technical scheme, preferably, the lifting hook is a digital display lifting hook, and the weight of the object can be displayed.

In the above technical scheme, it is further preferable that the measuring range of the digital display lifting hook is larger than the sum of the weights of the first hand chain block, the second hand chain block, the steel wire rope, the three lifting ring screws and the large nut.

In the above technical scheme, preferably, the bearing capacity of the first chain block and the second chain block is respectively greater than the sum of the weights of the large nut, the steel wire rope and the three lifting screws.

In the above technical solution, preferably, the bearing capacity of the steel wire rope is greater than the weight of the large nut.

The utility model has the advantages and positive effects that:

compared with the prior art, the utility model adopts a brand new technical scheme, the lifting hook capable of displaying the weight of an object is hung on the hook head of the crown block, two chain blocks are hung on the lifting hook, the chain blocks are directly connected with the steel wire ropes for bolting the two lifting ring screws, and the second chain block is connected with the lifting ring screws forming an angle of 90 degrees with the steel wire ropes, so that after the large nut is lifted, the large nut can be leveled and screwed into the screw rod through the first chain block, the digital display value of the lifting hook is continuously observed in the screwing process, and when the digital display value of the lifting hook becomes smaller, the digital display value of the lifting hook can be recovered by continuously adjusting the second chain block according to the requirement, so as to ensure continuous screwing. The utility model is suitable for screwing the vertical screw and the nut, can adjust and control the axial clearance in screwing the large-sized nut according to the requirement, can avoid the damage to the nut caused by zero clearance at the lower part, ensures the screwing quality of the large-sized nut and improves the integral screwing efficiency.

Drawings

Fig. 1 is a schematic view of an apparatus for controlling axial clearance in a large nut screwing process according to an embodiment of the present utility model.

In the figure: 1. a crown block; 2. a lifting hook; 3. a first hand chain block; 4. a second hand chain block; 5. a wire rope; 6. a suspension ring screw; 7. a large nut.

Detailed Description

For a further understanding of the utility model, its features and advantages, reference is now made to the following examples, which are illustrated in the accompanying drawings in which:

in the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices 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.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Examples

Referring to fig. 1, an embodiment of the present utility model provides a device for controlling an axial gap in a screwing process of a large nut, which includes a hook 2, a first chain block 3, a second chain block 4, a wire rope 5 and a suspension screw 6, wherein the top of the hook 2 is hung on a hook head of a crown block 1, the tops of the first chain block 3 and the second chain block 4 are both hung at the bottom of the hook 2, three suspension screws 6 are circumferentially and uniformly distributed on the upper end surface of the large nut 7, wherein two suspension screws 6 are connected through one wire rope 5, the bottom of the first chain block 3 is connected with the wire rope 5, and the bottom of the second chain block 4 is connected with another single suspension screw 6, so that the large nut 7 is always kept horizontal.

Wherein, the lifting hook 2 is a digital display lifting hook 2, and the weight of an object can be displayed. The measuring range of the digital display lifting hook 2 is larger than the sum of the weights of the first hand-pulling hoist 3, the second hand-pulling hoist 4, the steel wire rope 5, the three lifting ring screws 6 and the large-sized nut 7.

The bearing capacity of the first hand-pulling hoist 3 and the second hand-pulling hoist 4 is respectively larger than the sum of the weights of the large-sized nut 7, the steel wire rope 5 and the three lifting ring screws 6. The load bearing capacity of the steel wire rope 5 is greater than the weight of the large nut 7.

The specific working process of the utility model is as follows:

firstly, the crown block 1, the lifting hook 2, the first chain block 3, the second chain block 4, the steel wire rope 5, the lifting ring screw 6 and the large nut 7 are assembled according to the diagram shown in fig. 1, then the large nut 7 is lifted, the remote controller indication of the lifting hook 2 at the moment is recorded and is denoted as M, the large nut 7 is leveled by adjusting the first chain block 3 and is screwed with a screw rod, the remote controller indication of the lifting hook 2 is continuously observed in the screwing process, and when the remote controller indication of the lifting hook 2 is smaller than 0.98M, the second chain block 4 is adjusted to control the remote controller indication of the lifting hook 2 between 0.98M and M until the nut is screwed in place.

According to the utility model, the lifting hook 2 capable of displaying the weight of an object is hung on the hook head of the crown block 1, two chain blocks are hung on the lifting hook 2, the first chain block 3 is directly connected with the steel wire rope 5 for bolting the two lifting ring screws 6, and the second chain block 4 is connected with the lifting ring screws 6 forming an angle of 90 degrees with the steel wire rope 5, so that after the large nut 7 is lifted, the large nut 7 can be leveled and screwed into the screw rod through the first chain block 3, the digital display value of the lifting hook 2 is continuously observed in the screwing process, and when the digital display value of the lifting hook 2 becomes smaller, the digital display value of the lifting hook 2 can be recovered by continuously adjusting the second chain block 4 according to requirements, so that continuous screwing is ensured. The utility model is suitable for screwing a vertical screw and a nut, can adjust and control the axial clearance in screwing the large-sized nut 7 according to the requirement, can avoid the damage to the nut caused by zero clearance at the lower part, ensures the screwing quality of the large-sized nut 7 and improves the integral screwing efficiency.

The foregoing description is only of the preferred embodiments of the present utility model, and is not intended to limit the utility model in any way, but any simple modification, equivalent variation and modification of the above embodiments according to the technical principles of the present utility model are within the scope of the technical solutions of the present utility model.

Claims (5)

1. The utility model provides a device of control large-scale nut screwing in-process axial gap, its characterized in that includes lifting hook, chain block one, chain block two, wire rope and flying screw, the top of lifting hook is hung and is established on the coupler head of crown block, the top of chain block one and chain block two is all hung in the bottom of lifting hook, the up end circumference equipartition of large-scale nut has three flying screw, and wherein two flying screw pass through a wire rope and connect, the bottom of chain block one with wire rope is connected, the bottom of chain block two is connected with another solitary flying screw, makes large-scale nut remain the level all the time.

2. The device for controlling axial clearance in a large nut screwing process according to claim 1, wherein the hanging hook is a digital display hanging hook, and the weight of an object can be displayed.

3. The device for controlling the axial gap in the screwing process of the large-sized nut according to claim 2, wherein the measuring range of the digital display lifting hook is larger than the sum of the weights of the first hand-pulling block, the second hand-pulling block, the steel wire rope, the three lifting ring screws and the large-sized nut.

4. The device for controlling the axial clearance in the screwing process of the large-sized nut according to claim 1, wherein the bearing capacity of the first chain block and the second chain block is larger than the sum of the weights of the large-sized nut, the steel wire rope and the three eye screws.

5. The device for controlling axial clearance during threading of a large nut of claim 1 wherein the wire rope has a load bearing capacity greater than the weight of the large nut.