CN217413881U

CN217413881U - Nut tightening device

Info

Publication number: CN217413881U
Application number: CN202220780487.XU
Authority: CN
Inventors: 吴星龙; 周犊; 闵玉龙; 赵国浩; 丁东路; 张涛; 郭志
Original assignee: China General Nuclear Power Corp; CGN Power Co Ltd; China Nuclear Power Operation Co Ltd
Current assignee: China General Nuclear Power Corp; CGN Power Co Ltd; China Nuclear Power Operation Co Ltd
Priority date: 2022-03-31
Filing date: 2022-03-31
Publication date: 2022-09-13
Anticipated expiration: 2032-03-31

Abstract

The application relates to a nut tightening device, including the sleeve with screw up the subassembly, the sleeve is used for the card to hold the nut of treating screwing up, screws up the subassembly and includes driving piece, follower to and connect the haulage rope of driving piece and follower. The driven part is detachably connected to the sleeve, and the driving part is configured to be capable of rotating to wind the traction rope so as to drive the sleeve to rotate, so that tightening force acting on the nut clamped in the sleeve is provided. This application is through locating the nut in the sleeve, and the driving part can rotate in order to convolute the haulage rope to make the haulage rope can drive the sleeve with the help of the follower and rotate, and then make the sleeve drive the nut and rotate, in order to screw up the nut on the bolt, whole manipulation process need not great operating space, and then has improved the problem that present bolt and nut screws up the mode and is subject to the space size of environment.

Description

Nut tightening device

Technical Field

The application relates to the technical field of mechanical assembly, in particular to a nut screwing device.

Background

In the related art, the nut is usually screwed to the bolt by using a wrench, but this method requires a large operation space, and therefore, the nut cannot be screwed to the bolt in an environment where the space is small.

SUMMERY OF THE UTILITY MODEL

In view of this, it is necessary to provide a nut tightening device in order to solve the problem that the conventional bolt and nut tightening method is limited by the size of the space in the environment.

The embodiment of the application provides a nut tightening device, includes: the sleeve is used for clamping a nut to be screwed; the tightening assembly comprises a driving part, a driven part and a traction rope for connecting the driving part and the driven part; wherein the driven member is detachably connected to the sleeve; the driving piece is configured to rotate to wind the traction rope so as to drive the sleeve to rotate, and further provides a tightening force acting on the nut clamped in the sleeve.

In one embodiment, the follower comprises a connecting portion and a rotating arm; the connecting part is provided with a first rotation center line and is detachably connected with the sleeve, the rotating arm is provided with a first end and a second end which are oppositely arranged along the lengthwise direction of the rotating arm, the first end of the rotating arm is connected with the connecting part, and the second end of the rotating arm is connected with the traction rope; the first rotary central line and the longitudinal direction of the rotating arm are arranged at a preset angle.

In one embodiment, the sleeve has a second centerline of revolution; the first and second centre-of-gyration lines are parallel to each other or coincide with each other.

In one embodiment, the preset angle is 90 °.

In one embodiment, the tightening assembly further comprises a connecting rod connected to the driving member; the driving part is provided with a third rotary center line, and the connecting rod is configured to be capable of performing linear reciprocating motion along the third rotary center line so as to drive the driving part to move along the third rotary center line.

In one embodiment, the tightening assembly further comprises a bearing sleeved on the connecting rod; the driving part is rotatably connected with the connecting rod by means of the bearing.

In one embodiment, the nut tightening device further comprises a torque tester disposed on the sleeve; the driven piece is detachably connected with the sleeve by means of the torque tester.

In one embodiment, an alarm is arranged on the torque tester; the moment tester is configured to have a preset moment value, and the alarm is configured to provide warning information when the moment value measured by the moment tester reaches the preset moment value.

In one embodiment, the torque tester is removably coupled to the sleeve.

In one embodiment, the follower comprises a ratchet wrench; the ratchet wrench comprises a ratchet wheel and a wrench handle, wherein one end of the wrench handle is connected with the ratchet wheel; the ratchet wheel is detachably connected to the sleeve, and one end, far away from the ratchet wheel, of the trigger is connected to the traction rope.

The utility model provides a nut tightening device, including the sleeve with screw up the subassembly, the sleeve is used for the card to hold the nut of treating screwing up, screws up the subassembly and includes driving part, follower to and connect the haulage rope of driving part and follower. The driven part is detachably connected to the sleeve, and the driving part is configured to be capable of rotating to wind the traction rope so as to drive the sleeve to rotate, so that a tightening force acting on the nut clamped in the sleeve is provided. This application is through locating the nut in the sleeve, and the driving part can rotate in order to convolute the haulage rope to make the haulage rope can drive the sleeve with the help of the follower and rotate, and then make the sleeve drive the nut and rotate, in order to screw up the nut on the bolt, whole manipulation process need not great operating space, and then has improved the problem that present bolt and nut screws up the mode and is subject to the space size of environment.

Drawings

Fig. 1 shows a schematic structural diagram of a nut tightening device provided in an embodiment of the present application.

Description of reference numerals: 10. a nut; 20. a bolt; 100. a sleeve; 200. screwing the assembly; 210. a driving member; 211. an operating handle; 220. a driven member; 221. a connecting portion; 222. a rotating arm; 2221. a first end of a rotating arm; 2222. a second end of the rotating arm; 230. a hauling rope; 240. a connecting rod; 250. a bearing; 300. a torque tester; 400. a base; l1, first centerline of revolution; l2, second center of gyration; l3, third center of gyration.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

In the description of the present application, it is to 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," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

At present, each power plant fastens a nut in a limited space or fastens the nut by adopting a corner method, and a temporary marking method is required to record a rotation angle, so that the method has large measurement error and cannot be directly fastened by a torque wrench. Because the space is limited, can't directly fasten with the moment spanner, if adopt interim mark method record turned angle, then measuring error is great, and when carrying out the nut fastening to the turned angle method, can arouse great axial force load deviation, the dispersion is high to probably cause the nut bolt to rotate simultaneously, further increase measuring error, be unfavorable for on-the-spot locking load control of fastening.

Based on this, the inventor of the present application has conducted extensive research and has designed a nut tightening device to solve the problem that the current bolt and nut tightening method is limited by the size of the space of the environment.

An embodiment of the present application provides a nut tightening apparatus, as shown in fig. 1, including a sleeve 100 and a tightening assembly 200, wherein the sleeve 100 is used for holding a nut 10 to be tightened, and the tightening assembly 200 includes a driving member 210, a driven member 220, and a traction rope 230 connecting the driving member 210 and the driven member 220. Wherein the driven member 220 is detachably connected to the sleeve 100, and the driving member 210 is configured to be rotatable to wind the pulling rope 230, so that the pulling rope 230 can rotate the sleeve 100 by means of the driven member 220 to provide a tightening force to the nut 10 held in the sleeve 100.

This application is through locating the nut 10 that will wait to screw up in sleeve 100, and drive piece 210 can rotate in order to convolute haulage rope 230 to make haulage rope 230 can drive sleeve 100 with the help of follower 220 and rotate, and then make sleeve 100 drive nut 10 and rotate, in order to screw up nut 10 on bolt 20. In the whole operation process, the position of the driving part 210 is not limited by the space environment of the nut 10, so that the nut tightening device provided by the application does not need a large operation space, and the problem that the current bolt and nut tightening mode is limited by the space size of the environment is solved.

In some embodiments, the follower 220 includes a connection portion 221 and a rotation arm 222, the connection portion 221 has a first gyration centerline L1, and the connection portion 221 is detachably connected to the sleeve 100. The rotating arm 222 has a first end 2221 and a second end 2222 opposite to each other along the longitudinal direction thereof, the first end 2221 of the rotating arm is connected to the connecting portion 221, the second end 2222 of the rotating arm is connected to the traction rope 230, and the first rotation center line L1 is arranged at a predetermined angle with the longitudinal direction of the rotating arm 222, wherein the predetermined angle is greater than 0 ° and less than 180 °. Thus, the torque force applied to the connection portion 221 by the rotation arm 222 can drive the connection portion 221 to rotate around the first rotation center line L1, so that the connection portion 221 drives the sleeve 100 to rotate.

Meanwhile, the connecting sleeve 100 can be detached through the connecting portion 221, so that the connecting portion 221 can drive the sleeve 100 to rotate repeatedly, and the nut 10 is screwed for multiple times until the nut 10 is screwed on the bolt 20. In some embodiments, the connection between the connection portion 221 and the sleeve 100 includes a threaded connection or a snap-fit connection, and the specific design is not limited herein.

Specifically, when the longitudinal direction of the pulling rope 230 is parallel to the longitudinal direction of the rotating arm 222 during the tightening of the nut 10, the force applied by the pulling rope 230 on the sleeve 100 is only a radial force, and there is no tangential force for driving the sleeve 100 to rotate, so that the pulling rope 230 cannot drive the sleeve 100 to rotate by means of the follower 220. At this point, the coupling portion 221 can be removed from the sleeve 100 and the follower 200 repositioned so that the pull-cord 230 can rotate the sleeve 100 via the follower 220 to tighten the nut 10 again.

In particular to some embodiments, the sleeve 100 has a second centerline of revolution L2, the first centerline of revolution L1 and the second centerline of revolution L2 being parallel to or coincident with each other. Thus, the follower 220 rotates around the first rotation center line L1 to rotate the sleeve 100 around the second rotation center line L2, thereby providing a tightening force to the nut 10 retained in the sleeve 100.

Specifically, in some embodiments, the first rotation center line L1 is disposed at a predetermined angle of 90 ° with respect to the longitudinal direction of the rotating arm 222. In this way, during the rotation of the connection part 221 around the first rotation center line L1, the magnitude of the torque force applied to the connection part is equal to the magnitude of the pulling force applied to the rotating arm 222 by the pulling rope.

In some embodiments, in order to adjust the relative height between the traction rope 230 and the driven member 220, the tightening assembly 200 further includes a connecting rod 240 connected to the driving member 210, the driving member 210 having a third rotation center line L3, the connecting rod 240 being configured to be linearly reciprocated along the third rotation center line L3 to drive the driving member 210 to be movable along the third rotation center line L3. Specifically, when there is a height difference between the pulling rope 230 and the driven member 220, the driving member 210 can be driven to move along the third rotation center line L3 by means of the connecting rod 240, so that the pulling rope 230 and the driven member 220 are at the same height, and the pulling rope 230 can drive the driven member 220 to rotate.

In particular, in some embodiments, in order to enable the driving member 210 to rotate, the tightening assembly 200 further includes a bearing 250 sleeved on the connecting rod 240, and the driving member 210 is rotatably connected to the connecting rod 240 by means of the bearing 250. In this way, the traction rope 230 is wound around the driving member 210 by rotating the driving member 210.

In particular, in some embodiments, the tightening assembly further includes a base 400, the base 400 is connected to an end of the connecting rod 240 away from the driving member 210, and the base 400 and the connecting rod 240 are threadedly connected, such that the driving member 210 can be driven to move along the third rotation center line L3 by rotating the connecting rod 240. On the other hand, the driving member 210 is fixedly disposed by means of the base 400, thereby facilitating use. In other embodiments, the tightening assembly includes a driving cylinder (not shown) coupled to the driving member 210 such that the driving cylinder drives the driving member 210 along the third rotation center line L3. The specific design can be flexibly changed according to the actual situation, and is not limited herein.

In some embodiments, the nut tightening apparatus further comprises a torque tester 300 disposed on the sleeve 100, the follower 220 being detachably connected to the sleeve 100 by means of the torque tester 300. In particular, in some embodiments, the torque tester 300 is provided with an alarm (not shown), the torque tester 300 is configured to have a preset torque value, and the alarm is configured to provide an alarm when the torque value measured by the torque tester 300 reaches the preset torque value. The warning information may be sound and light, or may be text, and is not limited herein.

In particular, in some embodiments, to facilitate replacement of the torque tester 300, the torque tester 300 is removably coupled to the sleeve 100. Specifically, the torque tester 300 and the sleeve 100 may be connected by a snap, which is not limited herein.

In some embodiments, the follower 220 comprises a ratchet wrench (not shown) including a ratchet (not shown) removably coupled to the socket and a trigger (not shown) coupled to the ratchet at an end remote from the ratchet and coupled to the pull-cord. In this way, the ratchet wrench can tighten the nut 10 onto the bolt 20 via the socket 100 by utilizing the unidirectional force characteristic of the ratchet wrench.

In some embodiments, the pull-cord 230 comprises steel wire having high tensile strength, fatigue resistance, and impact toughness. Of course, in other embodiments, the pull cord 230 may include other types of cords, such as iron wire, but not limited thereto.

In some embodiments, to facilitate the control of the rotation of the driving member 210 by the operator, the driving member 210 includes an operating handle 211, and the operator holds the operating handle to control the rotation of the driving member 210.

The embodiment of the present application provides a nut tightening apparatus, which includes a sleeve 100 and a tightening assembly 200, wherein the sleeve 100 is used for holding a nut 10 to be tightened, and the tightening assembly 200 includes a driving member 210, a driven member 220, and a traction rope 230 connecting the driving member 210 and the driven member 220. Wherein the driven member 220 is detachably connected to the sleeve 100, and the driving member 210 is configured to be rotatable to wind the pulling rope 230, so that the pulling rope 230 can rotate the sleeve 100 by means of the driven member 220 to provide a tightening force to the nut 10 held in the sleeve 100. This application is through locating nut 10 in sleeve 100, and drive piece 210 can rotate in order to convolute haulage rope 230 to make haulage rope 230 can drive sleeve 100 with the help of follower 220 and rotate, and then make sleeve 100 drive nut 10 rotate, in order to tighten nut 10 on bolt 20, whole manipulation process need not great operating space, and then improved the problem that present bolt and nut mode of screwing up is subject to the space size of environment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A nut tightening apparatus, comprising:

the sleeve is used for clamping a nut to be screwed; and

the tightening assembly comprises a driving part, a driven part and a traction rope for connecting the driving part and the driven part;

wherein the driven member is detachably connected to the sleeve;

the driving piece is configured to rotate to wind the traction rope so as to drive the sleeve to rotate, and further provides a tightening force acting on the nut clamped in the sleeve.

2. The nut tightening apparatus according to claim 1, wherein the follower includes a connecting portion and a rotating arm;

the connecting part is provided with a first rotation center line and is detachably connected with the sleeve, the rotating arm is provided with a first end and a second end which are oppositely arranged along the lengthwise direction of the rotating arm, the first end of the rotating arm is connected with the connecting part, and the second end of the rotating arm is connected with the traction rope;

the first rotary central line and the longitudinal direction of the rotating arm are arranged at a preset angle.

3. The nut tightening apparatus according to claim 2, wherein the sleeve has a second center of rotation;

the first centre of gyration and the second centre of gyration are parallel to each other or coincide with each other.

4. The nut tightening apparatus according to claim 3, wherein the preset angle is 90 °.

5. The nut tightening apparatus according to any one of claims 1 to 4, wherein the tightening assembly further includes a connecting rod connected to the active member;

the driving part is provided with a third revolution center line, and the connecting rod is configured to be capable of performing linear reciprocating motion along the third revolution center line so as to drive the driving part to move along the third revolution center line.

6. The nut tightening apparatus according to claim 5, wherein the tightening assembly further comprises a bearing fitted over the connecting rod;

the driving part is rotatably connected with the connecting rod by means of the bearing.

7. The nut tightening apparatus according to any one of claims 1 to 4, wherein the nut 10 tightening apparatus further comprises a torque tester provided on the sleeve;

the driven piece is detachably connected with the sleeve by means of the torque tester.

8. The nut tightening apparatus according to claim 7, wherein an alarm is provided on the torque tester;

the moment tester is configured to have a preset moment value, and the alarm is configured to provide warning information when the moment value measured by the moment tester reaches the preset moment value.

9. The nut tightening apparatus according to claim 7, wherein the torque tester is detachably connected to the sleeve.

10. The nut tightening apparatus according to claim 1, wherein the follower includes a ratchet wrench;

the ratchet wrench comprises a ratchet wheel and a wrench handle, wherein one end of the wrench handle is connected with the ratchet wheel;

the ratchet wheel is detachably connected to the sleeve, and one end, far away from the ratchet wheel, of the trigger is connected to the traction rope.