CN218452751U - Bolt tightening and loosening device - Google Patents

Abstract

The utility model relates to the technical field of bolt tightening tools, and discloses a bolt tightening device, which comprises a mounting frame and a motor arranged at the top of the mounting frame, wherein the output shaft of the motor is connected with a hollow shaft arranged at the bottom of the mounting frame; the side wall of the hollow shaft is symmetrically provided with guide grooves parallel to the axial direction of the hollow shaft, the device also comprises a solid shaft, the solid shaft is provided with a torsion bar penetrating through the solid shaft, and two ends of the torsion bar are connected with the guide grooves; and the bottom end of the solid shaft, which is far away from the torsion bar, is provided with a threaded sleeve for disassembling the bolt. In the process of tightening and loosening the bolt, the solid shaft moves along the guide groove, and the relative positions of all other parts of the device are not changed.

Description

Bolt tightening and loosening device

Technical Field

The utility model relates to a bolt elasticity instrument technical field specifically, relates to a bolt take-up unit.

Background

The bolt is tightened into the object when it is required to be removed. Dismantle the screw through the screw take-up unit, the screw is in dismantling the in-process, and is natural, and the object surface will progressively be kept away from at the top of bolt, and the bolt take-up unit who is connected with the screw top then also will progressively keep away from the object surface. When the position of the object and the screw tightening and loosening device cannot move, the bolt tightening and loosening device cannot normally disassemble the bolt. That is, when the bolt is removed, the bolt tightening device moves together with the bolt. In the process of disassembling the bolt, the position between the bolt tightening and loosening device and an object cannot be kept unchanged.

The prior art discloses: CN201520462271.9 discloses a simple and easy bolt take-up unit, including handle (1), connecting rod (2) one end is connected on handle (1), is connected with chucking plate (3) on the other end, and connecting rod (2) and handle (1) and chucking plate (3) are all perpendicular, chucking plate (3) center offer with bolt head matched with through-hole (31) of bolt.

Although the prior art discloses a bolt tightening and loosening device for tightening and loosening a bolt by manually rotating a handle, the bolt tightening and loosening device can also displace along with the movement of the bolt in the bolt tightening and loosening process.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem lie in overcoming the problem that exists among the prior art, provide a bolt take-up unit that bolt take-up unit's position remains unchangeable among the bolt elasticity process.

The purpose of the utility model is realized through the following technical scheme:

the bolt tightening and loosening device comprises an installation frame and a motor arranged at the top of the installation frame, wherein an output shaft of the motor is connected with a hollow shaft arranged at the bottom of the installation frame, two guide grooves are symmetrically formed in the side wall of the hollow shaft, the bolt tightening and loosening device also comprises a solid shaft, a torsion bar penetrating through the solid shaft is arranged on the solid shaft, and two ends of the torsion bar are connected with the guide grooves; and the bottom end of the solid shaft, which is far away from the torsion bar, is provided with a threaded sleeve for disassembling the bolt.

Preferably, an output shaft of the motor is connected with a speed reducer, and an output shaft of the speed reducer is connected with a torque limiter; an output shaft of the torque limiter is connected with a hollow shaft.

Preferably, a coupling is further arranged between the output shaft of the torque limiter and the hollow shaft.

Preferably, the lower end of the hollow shaft is connected with an angular contact bearing, the angular contact bearing is arranged on a bearing cylinder, and the bearing cylinder is fixedly connected with the mounting rack.

Preferably, a spring is further arranged in the hollow shaft.

Preferably, the bottom of the mounting frame is connected with a linear bearing, the main body of the solid shaft is movably sleeved in the linear bearing, and the top of the solid shaft is provided with a through hole connected with the torsion bar.

Preferably, a universal joint is further arranged between the bottom end of the solid shaft and the threaded sleeve.

Preferably, the universal joint is sleeved with a correction spring.

Preferably, spring blocking sheets are arranged at two ends of the correction spring.

Preferably, blocking pieces are arranged at two end parts of the torsion bar protruding out of the guide groove.

Compared with the prior art, the utility model discloses a bolt take-up unit passes through the mount of mounting bracket as whole device, sets up the power supply of motor as the bolt elasticity on the mounting bracket, and it is rotatory to drive the hollow shaft through the motor, sets up two guide ways simultaneously on the hollow shaft, and the both ends and the guide way of the epaxial torsion bar of solid are connected, and when the hollow shaft was rotatory, it is rotatory to drive solid axle under the torsion bar effect, and the swivel nut is connected to the bottom of solid axle, finally realizes the elasticity to the bolt. In the process of tightening and loosening the bolt, the solid shaft moves along the guide groove, and the relative positions of all other parts of the device are not changed.

It has the following beneficial effects:

1) The hollow shaft is driven to rotate by the motor, and the solid shaft also rotates along with the hollow shaft under the action of the torsion bar, so that the automatic tightness of the bolt is realized.

2) The solid shaft can move along the guide groove relative to the hollow shaft, so that when the bolt is disassembled, only the solid shaft needs to move, other parts of the whole device do not need to move, and the mounting frame can be fixed on other parts.

3) And a spring is arranged, and the solid shaft is reset under the action of elasticity after the bolt is disassembled.

4) The correcting spring is arranged, so that the matching accuracy of the threaded sleeve and the bolt is guaranteed, and the tightness efficiency of the bolt is improved.

Drawings

Fig. 1 is a schematic structural view of a bolt tightening/loosening device of the present invention;

fig. 2 is a plan view of a double-shaft mechanism in the bolt tightening/loosening device of the present invention;

fig. 3 is a cross-sectional view of a double-shaft mechanism in a bolt tightening device of the present invention.

1-a motor; 2, a speed reducer; 3-mounting a frame; 4-torque limiter; 5-a coupler; 6-compression spring; 7-a hollow shaft; 8-torsion bar; 9-a load-bearing cylinder; 10-angular contact bearings; 11-a solid shaft; 12-a linear bearing; 13-spring catch; 14-a universal joint; 15-a correction spring; 16-thread sleeve; 17-a bolt; 18-through hole.

Detailed Description

In order to clearly illustrate the technical features of the present invention, the present invention is explained in detail by the following embodiments in combination with the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited by the specific embodiments disclosed below.

In addition, in the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting 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 to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more 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; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. 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. In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Example 1

As shown in fig. 1 to 3, a bolt tightening and loosening device comprises an installation frame 3 and a motor 1 arranged at the top of the installation frame 3, wherein an output shaft of the motor 3 is connected with a hollow shaft 7 arranged at the bottom of the installation frame 3; the side wall of the hollow shaft 7 is symmetrically provided with guide grooves parallel to the axial direction of the hollow shaft 7, the device also comprises a solid shaft 11, the solid shaft 11 is provided with a torsion bar 8 penetrating through the solid shaft 11, and two ends of the torsion bar 8 are connected with the guide grooves; the bottom end of the solid shaft 11 remote from the torsion bar 8 is provided with a threaded sleeve 16 for removing a bolt 17.

As the fixing frame of the whole device, the mounting frame 3 is provided with the motor 1 as a power source for loosening and tightening the bolt, and the output shaft of the motor 1 is connected with the hollow shaft 7, so that the hollow shaft 7 can be driven to rotate when the motor 1 rotates. Meanwhile, guide grooves parallel to the axial direction of the hollow shaft 7 are symmetrically formed in the side wall of the hollow shaft 7, a part of the main body of the solid shaft 11 is sleeved in the hollow shaft 7, a torsion bar 8 penetrating through the solid shaft 11 is connected to the solid shaft 11, and two ends of the torsion bar 8 are connected with the guide grooves. The hollow shaft 7 is driven to rotate by the motor 1, when the hollow shaft 7 rotates, the solid shaft 11 is driven to synchronously rotate under the action of the torsion bar 8, the bottom end of the solid shaft 11 is connected with the threaded sleeve 16, and finally, the bolt 17 is automatically tightened.

Meanwhile, the solid shaft 11 can move up and down in the hollow shaft 7 because the solid shaft 11 is movably connected with the hollow shaft 7. In the process of pulling out the bolt 17 in an loosening manner, the solid shaft 11 moves in the hollow shaft 7 along the guide groove, so that the degree of freedom of displacement in the process of loosening the bolt 7 is provided, and finally the displacement requirement in the process of loosening the bolt 17 is realized through the displacement of the solid shaft 11, so that the relative positions of all other components of the device are not changed.

In the embodiment, the solid shaft 11 can be relatively displaced relative to the hollow shaft 7 through the sleeving relation between the solid shaft 11 and the hollow shaft 7, so that the displacement requirement of the bolt 17 in the tightening process can be met through the displacement of the solid shaft 11 in the tightening process of the bolt 17. The biggest advantage of this application is in, can fix this bolt tightening means on certain fixed object to the realization is to the elasticity of bolt 17, thereby is applicable to in some narrow or special operational environment.

In this embodiment, a spring 6 may also be provided within the hollow shaft 7. During the tightening of the bolt 17, the solid shaft 11 will gradually compress the spring 6, and when the bolt 17 is completely removed, the solid shaft 11 will also complete the reset under the restoring action of the spring 6.

In this embodiment, in order to prevent both ends of the torsion bar 8 from coming off the guide groove, stoppers may be provided on both ends of the torsion bar 8 protruding out of the guide groove.

Example 2

The bolt tightening and loosening device comprises a mounting frame 3 and a motor 1 arranged at the top of the mounting frame 3, wherein an output shaft of the motor 3 is connected with a hollow shaft 7 arranged at the bottom of the mounting frame 3; the side wall of the hollow shaft 7 is symmetrically provided with guide grooves parallel to the axial direction of the hollow shaft 7, the device also comprises a solid shaft 11, the solid shaft 11 is provided with a torsion bar 8 penetrating through the solid shaft 11, and two ends of the torsion bar 8 are connected with the guide grooves; the bottom end of the solid shaft 11 remote from the torsion bar 8 is provided with a threaded sleeve 16 for removing a bolt 17.

The present embodiment is different from embodiment 1 in that: an output shaft of the motor 1 is connected with a speed reducer 2, and an output shaft of the speed reducer 2 is connected with a torque limiter 4; the output shaft of the torque limiter 4 is connected with a hollow shaft 7.

At present, the rotating speed of the motor on the market is relatively fast, and therefore when the motor 1 is directly adopted to drive the hollow shaft 7 and the solid shaft 11 to rotate so as to loosen and tighten the bolt 17, the bolt 17 is completely disassembled, and the bolt 17 is easily thrown away due to high-speed rotation. Therefore, the speed reducer 2 can be connected to the output shaft of the motor 1, the output shaft of the speed reducer 2 is connected with the torque limiter 4, and the output shaft of the torque limiter 4 is connected with the hollow shaft 7, so that the rotating speed of the solid shaft 7 is effectively controlled, and the solid shaft 7 can be protected. The speed reducer 2 and the torque limiter 4 are mature products in the industry, and the principle of the mature products is simply explained as follows:

the speed reducer plays a role in matching rotating speed and transmitting torque between the prime motor and the working machine or the actuating mechanism, is relatively precise machinery, aims at reducing the rotating speed and can be divided into a worm speed reducer and a planetary gear speed reducer; the shapes of the wheels can be divided into a cylindrical gear reducer, a conical gear reducer and a conical-cylindrical gear leading wheel reducer according to different transmission stages; according to the arrangement form of transmission, the speed reducer can be divided into an expansion type speed reducer, a split flow type speed reducer and a co-feeding shaft type speed reducer. The reducer is an independent part consisting of gear transmission, worm transmission and gear-worm transmission enclosed in a rigid shell, and is commonly used as a speed reduction transmission device between a prime mover and a working machine. The function of matching the rotation speed and transmitting the torque between the prime mover and the working machine or the actuating mechanism is very extensive in modern machinery.

The torque limiter (also called torque limiter, safety coupling, safety clutch, BMOOM limiter), is a part to connect the prime mover and the working machine, the main function is overload protection, when the overload or mechanical failure causes the required torque to exceed the set value, the torque limiter limits the torque transmitted by the transmission system in the form of slipping, while slipping, it can also stop the motor and the reducer by a signal output, when the overload situation disappears, the connection is recovered by itself. This prevents mechanical damage and avoids costly down time losses. The torque limiter uses a spring loaded friction surface with a nut or bolt to adjust the spring force to preset its slip torque. The torque limiter can be divided into a friction type torque limiter and a steel ball type torque limiter (a ball type torque limiter) according to the working principle, and the application range of the torque limiter is in the electronic equipment industry, the automatic production line industry, the conveyor industry and the like.

In the present embodiment, in order to facilitate the installation of the hollow shaft 7, a coupling 5 may be further provided between the output shaft of the torque limiter 4 and the hollow shaft 7. Meanwhile, an angular contact bearing 10 can be connected to the lower end of the hollow shaft 7, the angular contact bearing 10 is arranged on a bearing cylinder 9, and the bearing cylinder 9 is fixedly connected with the mounting frame 3. Angular contact ball bearing principle: the angular ball bearing bears axial loads in a critical manner, but can also bear axial loads and radial loads in addition. When it is only carrying axial loads, the interfacial tension is zero. When the axial side clearance of the angular contact ball bearing is larger, the angular contact ball bearing has the characteristics of an angular contact bearing and can bear larger radial load. It is easy to understand that the structure of the device is more stable due to the design that vibration is accompanied in the tightening and loosening process of the bolt.

Example 3

The bolt tightening and loosening device comprises a mounting frame 3 and a motor 1 arranged at the top of the mounting frame 3, wherein an output shaft of the motor 3 is connected with a hollow shaft 7 arranged at the bottom of the mounting frame 3; the side wall of the hollow shaft 7 is symmetrically provided with guide grooves parallel to the axial direction of the hollow shaft 7, the device also comprises a solid shaft 11, the solid shaft 11 is provided with a torsion bar 8 penetrating through the solid shaft 11, and two ends of the torsion bar 8 are connected with the guide grooves; the bottom end of the solid shaft 11 remote from the torsion bar 8 is provided with a threaded sleeve 16 for removing a bolt 17.

The present embodiment is different from the above embodiments in that: the bottom of the mounting frame 3 is connected with a linear bearing 12, part of the main body of the solid shaft 11 is movably sleeved in the linear bearing 12, and the top of the solid shaft 11 is provided with a through hole 18 connected with the torsion bar 8. The solid shaft 11 is sleeved in the linear bearing 12, and the top of the solid shaft 12 protrudes out of the linear bearing 12. When the solid shaft 11 rotates under the action of the motor 1, the solid shaft 11 can be well prevented from swinging in the rotating process under the action of the linear bearing 12, so that the effective tightness of the bolt 17 is ensured. Meanwhile, in order to facilitate the installation of the torsion bar 8, a through hole 18 may be formed at the top of the solid shaft 11, and the torsion bar 8 is installed in the through hole 18 in a plug-in manner.

In order to further ensure that the bolt 17 can be effectively tightened and loosened by the solid shaft 11, a universal joint 14 can be further arranged between the bottom end of the solid shaft 11 and the threaded sleeve 16. Meanwhile, in order to further improve the tightness efficiency of the bolt 17, a correction spring 15 can be sleeved on the universal joint 14. Meanwhile, spring blocking pieces 13 can be arranged at two ends of the correction spring 15, and the correction spring 15 is fixed and limited through the spring blocking pieces 13.

It should be understood that the above-mentioned embodiments are only examples for clearly illustrating the technical solutions of the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A bolt tightening and loosening device is characterized by comprising a mounting frame and a motor arranged at the top of the mounting frame, wherein an output shaft of the motor is connected with a hollow shaft arranged at the bottom of the mounting frame; the side wall of the hollow shaft is symmetrically provided with guide grooves parallel to the axial direction of the hollow shaft, the device also comprises a solid shaft, the solid shaft is provided with a torsion bar penetrating through the solid shaft, and two ends of the torsion bar are connected with the guide grooves; and the bottom end of the solid shaft, which is far away from the torsion bar, is provided with a threaded sleeve for disassembling the bolt.

2. The bolt tightening device according to claim 1, wherein an output shaft of the motor is connected to a speed reducer, and an output shaft of the speed reducer is connected to a torque limiter; an output shaft of the torque limiter is connected with a hollow shaft.

3. The bolt tensioner of claim 2, wherein a coupling is further disposed between the output shaft of the torque limiter and the hollow shaft.

4. The bolt tensioner as claimed in claim 2, wherein the lower end of the hollow shaft is connected to an angular contact bearing, the angular contact bearing being disposed on a load bearing cylinder, the load bearing cylinder being fixedly connected to the mounting bracket.

5. The bolt tensioner of claim 1, wherein a spring is further disposed within the hollow shaft.

6. The bolt tensioner as claimed in claim 1, wherein the bottom of the mounting bracket is connected to a linear bearing, the solid shaft portion body is movably fitted in the linear bearing, and the top of the solid shaft is provided with a through hole for connecting the torsion bar.

7. The bolt tensioner as defined in claim 1, wherein a universal joint is further provided between the bottom end of the solid shaft and the threaded sleeve.

8. The bolt tensioner of claim 7, wherein the gimbal is sleeved with a leveling spring.

9. The bolt tensioner of claim 8, wherein the correction spring is provided with spring stops at both ends.

10. The bolt tensioner as claimed in claim 8, wherein the ends of the torsion bar protruding out of the guide groove are provided with stoppers.

Images