CN216731579U - A kind of spanner - Google Patents

Abstract

The utility model provides a wrench, which relates to the field of fastener loading and unloading equipment and comprises a wrench body, a one-way rotating device, a rotating shaft sleeve, a driving device and a torque limiting assembly, wherein the driving device and the one-way rotating device are arranged on the wrench body, the wrench body is provided with a bearing seat, the rotating shaft sleeve penetrates through the bearing seat and the one-way rotating device, the rotating shaft sleeve is in transmission connection with the one-way rotating device, and the driving device is in transmission connection with the one-way rotating device through the torque limiting assembly.

Description

A kind of spanner

Technical Field

The utility model relates to the field of fastener assembling and disassembling equipment, in particular to a wrench.

Background

The spanner is an electric tool for screwing and unscrewing the bolt and the nut, and is a tool suitable for a universal inner hexagonal outer hexagonal bolt and nut. The device is used for automobile repair, equipment assembly, initial screwing, locking and dismounting of bolts and nuts of steel structure bridges, factory buildings and the like.

The existing spanner is easy to have the problem that the torque is difficult to control in the using process, and the bolt, the nut, a transmission mechanism inside the spanner and a motor battery can be damaged due to overlarge torque; if the torque is too small, the tightening will be insufficient.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a wrench, which solves the problem that torque is difficult to control easily in the using process of the existing wrench.

The embodiment of the utility model is realized by the following steps:

a wrench comprises a wrench body, a one-way rotating device, a rotating shaft sleeve, a driving device and a torque limiting assembly, wherein the driving device and the one-way rotating device are arranged on the wrench body, the wrench body is provided with a bearing seat, the rotating shaft sleeve penetrates through the bearing seat and the one-way rotating device, the rotating shaft sleeve is in transmission connection with the one-way rotating device, and the driving device is in transmission connection with the one-way rotating device through the torque limiting assembly.

Further, in some embodiments of the present invention, the one-way rotation device includes a first one-way rotation component and a second one-way rotation component having the same rotation direction, the second one-way rotation component is fixedly connected to the wrench body, the rotation shaft sleeve passes through the first one-way rotation component and the second one-way rotation component and is in transmission connection with the first one-way rotation component and the second one-way rotation component, and the driving device is in transmission connection with the first one-way rotation component through the torque limiting component.

Further, in some embodiments of the present invention, the first unidirectional rotating component includes a first unidirectional rotating element, the first unidirectional rotating element is sleeved on the rotating shaft sleeve, and the driving device is in transmission connection with the first unidirectional rotating element through the torque limiting component.

Further, in some embodiments of the present invention, the second unidirectional rotating assembly includes a second unidirectional rotating element, the second unidirectional rotating element is sleeved on the rotating shaft sleeve, and the second unidirectional rotating element is fixedly connected to the wrench body.

Further, in some embodiments of the present invention, the driving device includes a driving motor and a transmission gear set, the driving motor and the transmission gear set are both disposed inside the wrench body, and the driving motor is in transmission connection with the torque limiting assembly through the transmission gear set.

Further, in some embodiments of the present invention, the wrench further includes a battery, the battery is disposed on the wrench body, and the battery is electrically connected to the driving device.

Further, in some embodiments of the present invention, the wrench further includes a false touch prevention switch, the false touch prevention switch is disposed on the wrench body, and the false touch prevention switch is electrically connected to the driving device.

Further, in some embodiments of the present invention, the torque limiting assembly includes a transmission belt of a flexible structure, and the driving device is in transmission connection with the unidirectional rotating device through the transmission belt.

Further, in some embodiments of the present invention, the torque limiting assembly includes a torque limiter, and the driving device is in transmission connection with the unidirectional rotating device through the torque limiter.

Further, in some embodiments of the present invention, the outer sidewall of the wrench body is provided with anti-slip lines.

The embodiment of the utility model has at least the following advantages or beneficial effects:

the wrench in the embodiment comprises a wrench body, a one-way rotating device, a rotating shaft sleeve, a driving device and a torque limiting assembly, wherein the driving device and the one-way rotating device are arranged on the wrench body, the wrench body is provided with a bearing seat, the rotating shaft sleeve penetrates through the bearing seat and the one-way rotating device, the rotating shaft sleeve is in transmission connection with the one-way rotating device, and the driving device is in transmission connection with the one-way rotating device through the torque limiting assembly.

The use mode of the utility model is as follows: when the worker needs to use the wrench to install the fasteners such as nuts and bolts, the installation part (hexagonal rod or sleeve conversion handle) matched with the fastener can be inserted into the rotating shaft sleeve and fixed, or an external clamping device such as a commercially available clamping sleeve can be utilized, then the other end of the installation part is matched with the fastener, then the driving device is connected with an external power supply, the driving device is started, the driving device drives the torque limiting component to rotate, the torque limiting component can adopt a commercially available torque limiter, the torque limiting component drives the one-way rotating device to rotate, and further drives the rotating shaft sleeve positioned in the one-way rotating device to rotate along the preset direction of the one-way rotating device, the one-way rotating device can adopt any one commercially available one-way bearing, one-way ratchet, one-way gear or one-way clutch, and finally drives the installation part and the fastener to rotate, the realization is to the installation of fastener, and along with the rotation of fastener, torsion on the fastener can crescent, is greater than the default of moment of torsion restriction subassembly finally, and at this moment, the moment of torsion restriction subassembly can take place the idle running, and then avoids the fastener too big in the installation, makes drive arrangement produce the card under operating condition and dies, screws up fastener and installed part and hinder.

When the staff need use this spanner to carry out the nut, when the dismantlement of fasteners such as bolt, be connected drive arrangement with external power source, start drive arrangement, drive arrangement drives the moment of torsion restriction subassembly and rotates, the moment of torsion restriction subassembly drives one-way rotary device and rotates, and then it is rotatory to drive the rotatory axle sleeve pipe that is located one-way rotary device inside to predetermine the direction along one-way rotary device, because the installed part is intraductal from the opposite side rotatory axle sleeve this moment, for the fastener of having installed, the rotation of installed part has taken place the reversal to soon, consequently, the staff can convenient and fast use this spanner to dismantle the fastener, thereby solved current spanner and appeared the moment of torsion in the use and be difficult to control easily, and then damaged the problem of fastener.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic view of a wrench according to the present invention;

fig. 2 is a schematic view of an internal structure of a wrench according to the present invention.

Icon: 1-wrench body, 2-unidirectional rotation device, 21-first unidirectional rotation member, 211-transmission groove, 22-second unidirectional rotation member, 3-rotation shaft sleeve, 4-driving device, 41-driving motor, 42-transmission gear set, 5-transmission belt, 6-installation member, 7-storage battery, 8-mis-touch prevention switch, and 9-bearing seat.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, 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, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an orientation or a positional relationship based on the orientation or the positional relationship shown in the drawings, or an orientation or a positional relationship which is usually placed when the products of the present invention are used, the description is only for convenience and simplicity, and the indication or the suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, the present invention should not be construed as being limited. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Example 1

Referring to fig. 1-2, the present embodiment provides a wrench, including a wrench body 1, a unidirectional rotation device 2, a rotation shaft sleeve 3, a driving device 4 and a torque limiting assembly, where the driving device 4 and the unidirectional rotation device 2 are both disposed on the wrench body 1, the wrench body 1 is provided with a bearing seat 9, the rotation shaft sleeve 3 passes through the bearing seat 9 and the unidirectional rotation device 2, the rotation shaft sleeve 3 is in transmission connection with the unidirectional rotation device 2, and the driving device 4 is in transmission connection with the unidirectional rotation device 2 through the torque limiting assembly.

In this embodiment: when the worker needs to use the wrench to install the fasteners such as nuts and bolts, the mounting member 6 (hexagonal rod or sleeve conversion handle) matched with the fastener can be inserted into the rotating shaft sleeve 3 and fixed, or an external clamping device such as a commercially available ferrule can be used, then the other end of the mounting member 6 is matched with the fastener, then the driving device 4 is connected with an external power supply, the driving device 4 is started, the driving device 4 drives the torque limiting component to rotate, the torque limiting component can adopt a commercially available torque limiter, the torque limiting component drives the one-way rotating device 2 to rotate, and further drives the rotating shaft sleeve 3 positioned in the one-way rotating device 2 to rotate along the preset direction of the one-way rotating device 2, the one-way rotating device 2 can adopt any commercially available one-way bearing, one-way ratchet, one-way gear or one-way clutch, finally, drive installed part 6 and fastener and rotate, realize the installation to the fastener, along with the rotation of fastener, torsion on the fastener can crescent, is greater than the default of moment of torsion restriction subassembly finally, and at this moment, the idle running can take place for moment of torsion restriction subassembly, and then avoids the fastener too big in the installation torque for drive arrangement 4 takes place the card under operating condition and dies, screws up fastener and installed part 6 and hinders.

When the staff need use this spanner to carry out the nut, during the dismantlement of fasteners such as bolt, be connected drive arrangement 4 with external power source, start drive arrangement 4, drive arrangement 4 drives the moment of torsion restriction subassembly and rotates, the moment of torsion restriction subassembly drives one-way rotary device 2 and rotates, and then it is rotatory to drive the rotatory axle sleeve pipe 3 that is located 2 inside one-way rotary device and predetermine the direction along one-way rotary device 2, because installed part 6 inserts rotatory axle sleeve pipe 3 from the opposite side this moment, for the fastener of having installed, the rotation of installed part 6 has taken place the reversal to revolving, therefore the staff can convenient and fast's this spanner of use with the fastener dismantlement, thereby solved current spanner and appeared the moment of torsion in the use and be difficult to control easily, and then harm the fastener problem.

Example 2

Referring to fig. 1-2, the present embodiment provides a wrench based on the following embodiments, which are different from the embodiments: the unidirectional rotating device 2 comprises a first unidirectional rotating component and a second unidirectional rotating component which have the same rotating direction, the second unidirectional rotating component is fixedly connected with the wrench body 1, the rotating shaft sleeve 3 penetrates through the first unidirectional rotating component and the second unidirectional rotating component and is in transmission connection with the first unidirectional rotating component and the second unidirectional rotating component, and the driving device 4 is in transmission connection with the first unidirectional rotating component through the torque limiting component.

In this embodiment: the unidirectional rotating device 2 comprises a first unidirectional rotating component and a second unidirectional rotating component which have the same rotating direction, the fact that the rotating shaft sleeve 3 can rotate towards the rotating direction of the first unidirectional rotating component and the second unidirectional rotating component is ensured, and further a worker can drive the wrench body 1 to rotate along the mounting part 6 by rotating the wrench body 1 towards the rotating direction, and then reversely rotate the wrench body 1 to realize manual loading and unloading of fasteners, the second unidirectional rotating component is fixedly connected with the wrench body 1, the rotating shaft sleeve 3 penetrates through the first unidirectional rotating component and the second unidirectional rotating component and is in transmission connection with the first unidirectional rotating component and the second unidirectional rotating component, the second unidirectional rotating component is matched with the rotating shaft sleeve 3 to provide a platform for installing and supporting the first unidirectional rotating component, the driving device 4 is in transmission connection with the first unidirectional rotating component through the torque limiting component, make first one-way rotating assembly can take place to rotate under the effect of moment of torsion restriction subassembly, and then drive the rotatory axle sleeve pipe 3 that is located first one-way rotating assembly and the inside one-way rotating assembly of second and rotate, finally drive installed part 6 and carry out the electronic loading and unloading of fastener.

As the mounting part 6 drives the fastener to rotate, the torque force on the fastener is gradually increased and is finally larger than the preset value of the torque limiting component, at the moment, the torque limiting component idles, a worker can cut off an external power supply, then manually swing the wrench body 1 to enable the wrench body 1 to rotate towards the rotating direction, at the moment, the wrench body 1 rotates along the mounting part 6 as an axis, the wrench body drives the rotating shaft sleeve 3, the mounting part 6 and the fastener to rotate by using the second one-way rotating component which is fixed into a whole, then reversely swing the wrench body 1, at the moment, the rotating shaft sleeve 3 and the mounting part 6 rotate with certain resistance because of being in threaded connection with the fastener, and two groups of one-way rotating components use the one-way mechanism thereof, when reversely swinging, the wrench body 1 and the rotating shaft sleeve 3 are in a neutral position separation state, so that the wrench body 1 can easily rotate, the rotating shaft sleeve 3 is contacted with the fastener due to the installation part 6 in the rotating shaft sleeve 3, the rotating shaft sleeve 3 cannot rotate due to resistance, the wrench body 1 and the second unidirectional rotating component are fixedly connected, the wrench body 1 becomes a lever of the second unidirectional rotating component, the swinging wrench body 1 enables the second unidirectional rotating component to drive the rotating shaft sleeve 3 to rotate with large torque by utilizing lever force, the rotating shaft sleeve 3 always rotates with large torque in a preset direction until the fastener is manually locked by repeating large torque swinging for many times, the principle is the same as that of screwing the fastener in the dismounting process, the wrench body 1 and the second unidirectional rotating component are fixedly connected, the wrench body 1 becomes a lever of the second unidirectional rotating component, the swinging wrench body 1 drives the second unidirectional rotating component, the rotating shaft sleeve 3 and the installation part 6 to reversely rotate with large torque by utilizing lever force, and the fastener is unscrewed by repeating large torque swinging for many times, then be connected drive arrangement 4 and external power source, start drive arrangement 4, utilize drive arrangement 4 to drive the moment of torsion restriction subassembly and rotate, the moment of torsion restriction subassembly drives first one-way rotating assembly and rotates, and then it is rotatory to drive the rotatory axle sleeve pipe 3 that is located 2 inside one-way rotating device and predetermine the direction along one-way rotating device 2, because this moment installed part 6 is in inserting rotatory axle sleeve pipe 3 from the opposite side, for the fastener of having installed, the reversal has taken place to the soon of installed part 6, therefore the staff can convenient and fast's this spanner of use dismantle the fastener.

Example 3

Referring to fig. 1-2, the present embodiment provides a wrench based on any one of the above embodiments, which is different from any one of the above embodiments in that: the first unidirectional rotation assembly comprises a first unidirectional rotation element 21, the first unidirectional rotation element 21 is sleeved on the rotation shaft sleeve 3, and the driving device 4 is in transmission connection with the first unidirectional rotation element 21 through the torque limiting assembly.

In this embodiment: first one-way rotating assembly includes first one-way rotating member 21, the axis of rotation sleeve pipe 3 is located to first one-way rotating member 21 cover, when axis of rotation sleeve pipe 3 is rotatory towards the direction of predetermineeing of first one-way rotating member 21, axis of rotation sleeve pipe 3 can smoothly rotate, first one-way rotating member 21 can adopt any one-way bearing of selling on the market, one-way ratchet, one-way gear or one-way clutch, drive arrangement 4 passes through the moment of torsion restriction subassembly and is connected with the transmission of first one-way rotating member 21, it drives first one-way rotating member 21 through the moment of torsion restriction subassembly to be convenient for drive arrangement 4 and rotates, and then drive axis of rotation sleeve pipe 3 and rotate, finally drive installed part 6 and rotate, realize the electronic loading and unloading to the fastener.

Example 4

Referring to fig. 1-2, the present embodiment provides a wrench based on any one of the above embodiments, which is different from any one of the above embodiments in that: the second unidirectional rotating assembly comprises a second unidirectional rotating element 22, the second unidirectional rotating element 22 is sleeved on the rotating shaft sleeve 3, and the second unidirectional rotating element 22 is fixedly connected with the wrench body 1.

In this embodiment: the second unidirectional rotation component comprises a second unidirectional rotation element 22, the second unidirectional rotation element 22 is sleeved on the rotation shaft sleeve 3, when the rotation bushing 3 is rotated toward the preset direction of the first and second unidirectional rotating pieces 21 and 22, the rotating shaft sleeve 3 can rotate smoothly, the second one-way rotating element 22 can adopt any one of commercially available one-way bearings, one-way ratchets, one-way gears or one-way clutches, the second one-way rotating element 22 is fixedly connected with the wrench body 1, when drive arrangement 4 passes through the moment of torsion restriction subassembly and drives first unidirectional rotation piece 21 and rotate, rotatory axle sleeve pipe 3 can rotate along with second unidirectional rotation piece 22, and second unidirectional rotation piece 22 can play the spacing effect of activity this moment, guarantees that rotation shaft sleeve pipe 3 can be along with the even and stable rotation of first unidirectional rotation piece 21.

Example 5

Referring to fig. 1-2, the present embodiment provides a wrench based on any one of the above embodiments, which is different from any one of the above embodiments in that: the driving device 4 includes a driving motor 41 and a transmission gear set 42, the driving motor 41 and the transmission gear set 42 are both disposed inside the wrench body 1, and the driving motor 41 is in transmission connection with the torque limiting assembly through the transmission gear set 42.

In this embodiment: the driving device 4 comprises a driving motor 41 and a transmission gear set 42, the driving motor 41 and the transmission gear set 42 are both arranged inside the wrench body 1, the driving motor 41 can adopt any commercially available servo motor, the transmission gear set 42 can adopt any commercially available transmission gear box, the driving motor 41 is in transmission connection with the torque limiting assembly through the transmission gear set 42, and the transmission gear set 42 can adjust the output rotating speed of the driving motor 41 so as to adjust the rotating speed of the rotating shaft sleeve 3.

Example 6

Referring to fig. 1-2, the present embodiment provides a wrench based on any one of the above embodiments, which is different from any one of the above embodiments in that: the wrench body is characterized by further comprising a storage battery 7, wherein the storage battery 7 is arranged on the wrench body 1, and the storage battery 7 is electrically connected with the driving device 4.

In this embodiment: still include battery 7, battery 7 locates spanner body 1, and battery 7 can adopt any kind of like product sold in the market, battery 7 and drive arrangement 4 electric connection, and battery 7 can provide electric power for drive arrangement 4, promotes this spanner's suitability.

Example 7

Referring to fig. 1-2, the present embodiment provides a wrench based on any one of the above embodiments, which is different from any one of the above embodiments in that: still include mistake proofing touch switch 8, above-mentioned mistake proofing touch switch 8 locates above-mentioned spanner body 1, above-mentioned mistake proofing touch switch 8 and above-mentioned drive arrangement 4 electric connection.

In this embodiment: still including preventing mistake and touching switch 8, prevent that mistake and touch switch 8 locates spanner body 1, prevent that mistake and touch switch 8 can adopt any kind of like product sold in the market, can avoid this spanner to produce the mistake under the exogenic action and touch, prevent mistake and touch switch 8 and drive arrangement 4 electric connection.

Example 8

Referring to fig. 1-2, the present embodiment provides a wrench based on any one of the above embodiments, which is different from any one of the above embodiments in that: the torque limiting assembly comprises a transmission belt 5 with a flexible structure, and the driving device 4 is in transmission connection with the unidirectional rotating device 2 through the transmission belt 5.

In this embodiment: drive arrangement 4 passes through drive belt 5 and is connected with the transmission of unidirectional rotation device 2, when drive arrangement 4 drives drive belt 5 and rotates, drive belt 5 drives unidirectional rotation device 2 through frictional force and rotates, thereby drive rotation shaft sleeve pipe 3 and installed part 6 and rotate, realize the electronic loading and unloading to the fastener, along with the tightening of fastener, when the moment of torsion of fastener is greater than the frictional force between drive belt 5 and the unidirectional rotation device 2, drive belt 5 just can take place to skid, thereby avoid drive arrangement 4 to continue to drive unidirectional rotation device 2 and rotate, twist smooth tooth with the cooperation department of fastener and installed part 6, furthermore, can also reduce the damage to battery 7.

In some other embodiments of this embodiment, the outer side wall of the first unidirectional rotating member 21 is provided with a transmission groove 211 engaged with the transmission belt 5.

In the present embodiment: the lateral wall of first unidirectional rotation piece 21 is equipped with the driving groove 211 with drive belt 5 complex, and driving groove 211 can increase the frictional force between first unidirectional rotation piece 21 and the drive belt 5, and then promotes the transmission effect.

In some other embodiments of this embodiment, the transmission belt 5 may be made of any commercially available rubber material or silicone material.

In the present embodiment: the transmission belt 5 made of any commercially available rubber material or silica gel material is low in cost, reliable in performance and strong in replaceability.

Example 9

Referring to fig. 1-2, the present embodiment provides a wrench based on any one of the above embodiments, which is different from any one of the above embodiments in that: the torque limiting assembly includes a torque limiter, and the driving device 4 is in transmission connection with the unidirectional rotation device 2 through the torque limiter.

In the present embodiment: the torque limiter can adopt any one of the similar products sold in the market, can effectively limit the output torque of the driving device 4, and when the output torque is greater than the preset value, the torque limiter can idle, so that the driving device 4 is prevented from continuously driving the unidirectional rotating device 2 to rotate, the screw teeth at the matching position of the fastening piece and the mounting piece 6 are twisted and damaged, and in addition, the damage to the storage battery 7 can be reduced.

Example 10

Referring to fig. 1-2, the present embodiment provides a wrench based on any one of the above embodiments, which is different from any one of the above embodiments in that: the outer side wall of the wrench body 1 is provided with anti-skid lines.

In this embodiment: the lateral wall of the wrench body 1 is provided with anti-slip lines, the anti-slip lines can increase the friction force between the wrench body 1 and the hands of workers, and the gripping comfort level is improved.

In summary, the embodiments of the present invention provide a wrench, which at least has the following advantages:

a wrench comprises a wrench body 1, a one-way rotating device 2, a rotating shaft sleeve pipe 3, a driving device 4 and a torque limiting assembly, wherein the driving device 4 and the one-way rotating device 2 are arranged on the wrench body 1, the wrench body 1 is provided with a bearing seat 9, the rotating shaft sleeve pipe 3 penetrates through the bearing seat 9 and the one-way rotating device 2, the rotating shaft sleeve pipe 3 is in transmission connection with the one-way rotating device 2, and the driving device 4 is in transmission connection with the one-way rotating device 2 through the torque limiting assembly.

When the worker needs to use the wrench to install fasteners such as nuts and bolts, the installation member 6 (hexagonal rod or sleeve conversion handle) matched with the fastener can be inserted into the rotating shaft sleeve 3 and fixed, or an external clamping device such as a commercially available ferrule can be used, then the other end of the installation member 6 is matched with the fastener, then the driving device 4 is connected with an external power supply, the driving device 4 is started, the driving device 4 drives the torque limiting component to rotate, the torque limiting component can adopt a commercially available torque limiter, the torque limiting component drives the one-way rotating device 2 to rotate, and further drives the rotating shaft sleeve 3 positioned in the one-way rotating device 2 to rotate along the preset direction of the one-way rotating device 2, the one-way rotating device 2 can adopt any commercially available one-way bearing, one-way ratchet, one-way gear or one-way clutch, finally, drive installed part 6 and fastener and rotate, realize the installation to the fastener, along with the rotation of fastener, torsion on the fastener can crescent, is greater than the default of moment of torsion restriction subassembly finally, and at this moment, the idle running can take place for the moment of torsion restriction subassembly, and then avoids the fastener too big in the installation torque for drive arrangement 4 takes place the card under operating condition and dies, screws up fastener and installed part 6 and hinders.

When the staff need use this spanner to carry out the nut, when the dismantlement of fasteners such as bolt, be connected drive arrangement 4 with external power source, start drive arrangement 4, drive arrangement 4 drives the moment of torsion restriction subassembly and rotates, the moment of torsion restriction subassembly drives one-way rotary device 2 and rotates, and then it is rotatory to drive the rotatory axle sleeve pipe 3 that is located 2 inside one-way rotary device and predetermine the direction along one-way rotary device 2, because installed part 6 inserts rotatory axle sleeve pipe 3 from the opposite side this moment, for the fastener of having installed, the rotation of installed part 6 has taken place the reversal to revolving, consequently, the staff can convenient and fast's this spanner of use with the fastener dismantlement, thereby solved current spanner and appeared the moment of torsion in the use and be difficult to control easily, and then the problem of damage fastener.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A wrench, characterized in that: including spanner body, unidirectional rotation device, rotation shaft sleeve pipe, drive arrangement and moment of torsion restriction subassembly, drive arrangement with unidirectional rotation device all locates the spanner body, the spanner body is equipped with the bearing frame, rotation shaft sleeve pipe passes the bearing frame with unidirectional rotation device, rotation shaft sleeve pipe with unidirectional rotation device transmission is connected, drive arrangement passes through the moment of torsion restriction subassembly with unidirectional rotation device transmission is connected.

2. A wrench as claimed in claim 1, wherein: the one-way rotating device comprises a first one-way rotating assembly and a second one-way rotating assembly, the rotating directions of the first one-way rotating assembly and the second one-way rotating assembly are the same, the second one-way rotating assembly is fixedly connected with the wrench body, the rotating shaft sleeve penetrates through the first one-way rotating assembly and the second one-way rotating assembly and is in transmission connection with the first one-way rotating assembly and the second one-way rotating assembly, and the driving device is in transmission connection with the first one-way rotating assembly through the torque limiting assembly.

3. A wrench as claimed in claim 2, wherein: the first unidirectional rotating assembly comprises a first unidirectional rotating piece, the first unidirectional rotating piece is sleeved on the rotating shaft sleeve, and the driving device is in transmission connection with the first unidirectional rotating piece through the torque limiting assembly.

4. A wrench as claimed in claim 2, wherein: the second unidirectional rotating assembly comprises a second unidirectional rotating piece, the second unidirectional rotating piece is sleeved on the rotating shaft sleeve, and the second unidirectional rotating piece is fixedly connected with the wrench body.

5. A wrench as claimed in claim 1, wherein: the driving device comprises a driving motor and a transmission gear set, the driving motor and the transmission gear set are all arranged inside the wrench body, and the driving motor is in transmission connection with the torque limiting assembly through the transmission gear set.

6. A wrench as claimed in claim 1, wherein: still include the battery, the battery is located spanner body, the battery with drive arrangement electric connection.

7. A wrench as claimed in claim 1, wherein: still include mistake proofing touch switch, mistake proofing touch switch locates the spanner body, mistake proofing touch switch with drive arrangement electric connection.

8. A wrench as claimed in claim 1, wherein: the torque limiting assembly comprises a transmission belt of a flexible structure, and the driving device is in transmission connection with the unidirectional rotating device through the transmission belt.

9. A wrench as claimed in claim 1, wherein: the torque limiting assembly comprises a torque limiter, and the driving device is in transmission connection with the unidirectional rotating device through the torque limiter.

10. A wrench as claimed in claim 1, wherein: the spanner body lateral wall is equipped with anti-skidding line.

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