CN209273322U - Torsion control device of electric screwdriver - Google Patents

Abstract

The utility model provides a torsion controlling means of electronic bottle opener, it is used for connecting a tool head, and contain a drive casing, a transmission module, a torsion sleeve and an at least strain gauge, the tool head is connected in the front end of drive casing, transmission module sets up in the drive casing, and can drive the relative drive casing rotation of tool head, it sets up in the drive casing to twist reverse the sleeve, and connect drive casing and transmission module, and can receive transmission module's drive and produce deformation, the strain gauge sets up on twisting the sleeve, and can listen and take notes the deformation that twists reverse the sleeve, the utility model discloses an install the electronic bottle opener of strain gauge, make the data of electronic bottle opener in use can be completely recorded, make torsion processing numerical value every time all can accurately control, and then improve the accuracy and the efficiency of course of working.

Description

Torque control device for electric screwdriver

technical field

The utility model relates to a structural improvement of a hand tool, in particular to a torque control device for an electric screwdriver.

Background technique

An electric screwdriver is a hand tool for disassembling locking elements such as bolts or screws. Through the rotation of the internal rotating motor, the bolts or screws can be quickly disassembled on the surface to be processed.

However, the electric screwdriver in the prior art is designed with a structure that can adjust its torque, because the electric screwdriver needs to adjust its rotational force according to the material and hardness of the surface to be processed, and the structural strength of the screw or bolt itself, so as to avoid force If it is too strong, the surface to be processed and the structure of the bolt itself will be damaged, or if the force is too weak, the electric screwdriver may not be able to firmly set the bolt on the processed surface.

More precisely, as shown in FIG. 9 , the operation process of the electric screwdriver 90 used in the factory in the prior art is as follows: after the power is connected, when the user starts the electric screwdriver 90, its internal control mechanism will be triggered. plate, and then drives the motor to drive a gear box to rotate, and the gear box is also connected with a torque adjustment device, which can set the upper limit of the torque of the electric screwdriver; on the other hand, the gear box is further connected with a mechanical brake mechanism , the brake mechanism is connected to the output shaft group at the same time, and the shaft group is the tool head of the electric screwdriver.

When the electric screwdriver reaches its upper limit of torque during operation, it will trigger the mechanical brake mechanism and send information back to the control board to stop the motor and stop the entire operation process.

However, the prior art electric screwdrivers have the following disadvantages.

First, please refer to shown in Fig. 9, the structure of the torsion adjustment device of electric screwdriver 90 in the prior art is that the spring 94 inside the shell of electric screwdriver 90 and a plurality of steel balls (not shown in the figure) differ in degree. More precisely, when the user sets the specified torque, when the electric screwdriver 90 is twisted to the torque, the steel ball inside the casing will jump away, so that the spring 94 and the motor that provides the torque The phases are separated to form the situation of the motor idling, so that the user can know that the torque has reached the default value.

However, when the user wants to adjust different torques every time, he must take the electric screwdriver 90 from the processing place to an adjustment device to tighten or loosen the spring 94, and cannot manually and timely adjust the torque (another reason In order to avoid the inaccuracy of artificial adjustment), it is very inconvenient to adjust the torque.

Second, in order to reduce the frequency of adjusting the torque during processing, the user usually has to prepare multiple electric screwdrivers 90 with different torques before processing, which will cause a burden on the cost.

Third, the torsion achieved by the pressure path of the spring 94 and steel balls and other components, after a period of use, will cause structural deformation or fatigue of the steel balls and other devices due to long-term friction and pressure, resulting in adjustment. The error, which in turn causes the user to be unable to accurately twist to the desired locking torque level when using it.

Fourth, in order to respond to the concept of Industry 4.0, the tools of the new generation of factories should have the function of detecting, recording and adjusting various data of the tools at any time. In other words, the processing components should be designed to detect their processing However, the electric screwdriver 90 in the prior art is not equipped with such a structure that can digitize the machining process, and therefore cannot record the data of each machining process during the machining process.

In summary, the electric screwdrivers of the prior art have their defects.

Utility model content

In view of the shortcomings and deficiencies of the prior art, the utility model provides a torque control device for an electric screwdriver, which is equipped with a deformation sensing device that can detect the degree of twisting inside the electric screwdriver, so that the user can twist the torque The data is digitized, and at the same time, the torque required to be applied by the electric screwdriver is automatically adjusted through the computer.

In order to achieve the above-mentioned purpose of the utility model, the technical means adopted in the utility model is a torque control device of an electric screwdriver, which is used to connect a tool head, and the torque control device of the electric screwdriver includes:

a drive housing, the opposite ends of which are respectively a front end and a rear end, the front end of the drive housing is used to connect the tool head;

a transmission module, which is arranged in the drive housing and can be used to drive the tool head to rotate relative to the drive housing;

a torsion sleeve, which is arranged in the drive housing, is connected to the drive housing and the transmission module, and can be deformed by the transmission module;

At least one strain gauge is arranged on the torsion sleeve, and each of the at least one strain gauge can detect and record the deformation of the torsion sleeve.

The utility model has the advantage that by installing a strain gauge on the torsion sleeve, and detecting the deformation of the torsion sleeve through the strain gauge, sensing and recording are carried out, and at the same time, the torsional force detected by the strain gauge is After transmitting the value to the centrally controlled computer, when the twisting sleeve reaches the upper limit of the twisting force predetermined by the user, the user can automatically control through the computer to stop the motor driving the twisting force, and then achieve the same effect as the prior art using springs and steel balls. produced effect.

But at the same time, the user can also clearly know the exact torque and other relevant data every time the electric screwdriver is operated, so that the user can make customized adjustments for different processing states to achieve a more perfect locking function; On the other hand, through the transmission of data, the torque of the electric screwdriver can also be controlled by the computer. Therefore, when using the utility model, the user does not need to prepare multiple screwdrivers with different torques for replacement at any time, but can adjust each screwdriver through the central computer. The torsion force that the electric screwdriver will exert in the next rotation, thereby achieving the purpose of improving processing efficiency and saving costs.

Finally, since the deformation of the torsion sleeve is actually very small, compared with the springs and steel balls of the prior art, they will be subjected to a very large push pressure during each use. The physical structure will not bear infrequent and huge pressure, so compared with the torsion device of the prior art, the utility model is very excellent in the durability of actual use.

Furthermore, the aforementioned torque control device for an electric screwdriver further includes at least one rotating bearing, which is arranged in the drive housing and sleeved on the transmission module, and the inner and outer surfaces of the rotating bearing are respectively attached to fit the transmission module and the inner wall of the drive housing.

Further, in the aforementioned torque control device for an electric screwdriver, the twisting sleeve further includes: a front connection part disposed behind the transmission module; a rear connection part disposed behind the front connection part; A sensing part, which is arranged between the front connecting part and the rear connecting part, and the thickness of the sensing part is smaller than the thickness of the front connecting part, the thickness of the sensing part is smaller than the thickness of the rear connecting part, and The at least one strain gauge is disposed on the outer wall of the sensing part.

Furthermore, in the aforementioned electric screwdriver torque control device, the sensing part further includes a sensing wall and a plurality of long holes, the long holes are spaced apart from each other and formed through the sensing wall, and along the sensing The wall extends in the circumferential direction, and each of the at least one strain gauge is arranged between any two adjacent long holes.

Furthermore, in the aforementioned electric screwdriver torque control device, the torsion sleeve is screwed and fixed inside the drive housing by a plurality of bolts.

Furthermore, in the aforementioned electric screwdriver torque control device, wherein the transmission module is located between the tool head and the torsion sleeve.

Description of drawings

Fig. 1 is a perspective view of the utility model.

Fig. 2 is an exploded view of the components of the utility model.

Fig. 3 is an exploded and enlarged view of the torsion sleeve and the signal sensing device of the present invention.

Fig. 4 is a sectional view of the utility model.

Fig. 5 is an enlarged cross-sectional view of the torsion sleeve of the present invention.

Fig. 6 is a three-dimensional appearance view of the utility model installed on an electric screwdriver.

FIG. 7 is an exploded view of the components of FIG. 6 .

FIG. 8 is a sectional view of FIG. 6 .

Fig. 9 is an exploded view of components of a prior art electric screwdriver torque control device.

Detailed ways

The technical means adopted by the utility model to achieve the intended purpose of the utility model will be further elaborated below in conjunction with the accompanying drawings and preferred embodiments of the utility model.

Please refer to Fig. 1, Fig. 6 and shown in Fig. 7, the torsion control device of the electric screwdriver of the present utility model is used for connecting a tool head 91 and a motor 92, and tool head 91 and motor 92 are arranged on the front end and the motor 92 of the present utility model respectively. rear end.

Please refer to FIG. 2 , FIG. 3 and FIG. 4 , the utility model includes a driving housing 10 , a transmission module 20 , a torsion sleeve 30 , at least one strain gauge 40 and at least one rotating bearing 50 .

Please refer to Fig. 2, Fig. 4 and shown in Fig. 8, the opposite ends of drive housing 10 are respectively a front end and a rear end, and the front end of drive housing 10 is connected with this tool head 91; The housing 10 is used to drive the tool head 91 to rotate relative to the driving housing 10. In addition, in this embodiment, the transmission module 20 is a planetary gear set.

Please refer to Fig. 2, Fig. 3 and Fig. 8, the torsion sleeve 30 is arranged in the driving housing 10 and connected to the driving housing 10 and the transmission module 20; in this example, the aforementioned transmission module 20 is arranged in the tool head 91 and The center of the twist sleeve 30, but the arrangement position of the transmission module 20 and the twist sleeve 30 is not limited thereto; in addition, in this embodiment, the twist sleeve 30 is a cylindrical sleeve, but its shape is not Limited to cylinders.

Please refer to Fig. 2, Fig. 3 and Fig. 5, the torsion sleeve 30 can be driven by the transmission module 20 to produce deformation. The ring gear (not shown in the figure) is fixed, and the rear end of the torsion sleeve 30 is screwed and fixed to the inside of the drive housing 10 through a plurality of bolts 11, and when the planetary gear set inside the transmission module 20 is torsion to After a certain torque, the sun gear of the planetary gear set cannot drive the ring gear to rotate together, and then the ring gear starts to drive the front end of the torsion sleeve 30 to rotate together. At this time, because the rear end of the torsion sleeve 30 is driven The housing 10 is fixed so that it can produce a difference in torsion between the front and rear ends.

3 and 5, the twisting sleeve 30 further includes a front connecting portion 31, a rear connecting portion 32 and a sensing portion 33, the front connecting portion 31 is arranged at the rear of the transmission module 20, and the rear connecting portion 32 It is arranged behind the front connecting part 31 , and the sensing part 33 is arranged between the front connecting part 31 and the rear connecting part 32 , and is connected to the two structures front and rear.

Please refer to Fig. 5, more precisely, in this embodiment, the torsion sleeve 30 is a cylindrical sleeve with two ends through, and the thickness of the sensing portion 33 is smaller than the thickness of the front connecting portion 31, and the sensing portion 33 is also smaller than the thickness of the rear connecting portion 32, and on the sensing portion 33, it further includes a sensing wall 331 and a plurality of elongated holes 332, the aforementioned thickness of the sensing portion 33 refers to the sensing wall 331 thickness, and the long holes 332 are formed through the sensing wall 331 at intervals and extend along the circumferential direction of the sensing wall 331 .

Please refer to FIG. 3, each of the at least one strain gauge 40 is arranged on the torsion sleeve 30, and can be used to detect and record the deformation of the torsion sleeve 30. In this embodiment, the number of the at least one strain gauge 40 is multiple, but it is not limited thereto, and the strain gauge 40 is arranged on the outer wall surface of the sensing portion 33, more precisely, each of the strain gauges 40 is arranged between any two adjacent long holes 332 , so that the long holes 332 and the strain gauges 40 are alternately located on the sensing wall 331 .

On the other hand, when the utility model is in use, the strain gauge 40 is electrically connected to a signal sensing device 93, and the value recorded by the strain gauge 40 is transmitted to an external computer through the signal sensing device 93. In an example, the signal sensing device 93 is disposed inside the torsion sleeve 30 , but its position is not limited thereto.

Please refer to Fig. 4 and Fig. 8, the at least one rotating bearing 50 is arranged in the drive housing 10, and in this embodiment, the number of the at least one rotating bearing 50 is two, and the two rotating bearings 50 are respectively along the It is arranged front and back, sleeved on the transmission module 20 , and the inner surface and the outer surface of each of the rotating bearings 50 are attached to the inner wall surfaces of the transmission module 20 and the driving housing 10 respectively.

The following are the usage status and advantages of the utility model.

Please refer to Fig. 2, Fig. 3 and shown in Fig. 7, when the utility model is in use, it will be connected to an external computer (not shown) through the signal sensing device 93, and the torque transmission of the motor 92 will be preset by the computer. The upper limit, this signal sensing device can transmit data such as braking, processing steps and counting at the same time.

In actual operation, when the user starts the electric screwdriver, the motor starts to run and a bolt or screw is gradually locked into the object to be processed through the rotation of the tool head 91, the torsion force on the tool head 91 will gradually transfer to Twist the sleeve 30, and make the torsion sleeve 30 start to twist slightly. After this torsional deformation is generated, it will be recorded by the strain gauge 40 and sent back to the external computer through the signal sensing device 93. When the strain gauge 40 When the recorded amount reaches the preset value before use, the computer will stop the motor 92, and then stop the electric screwdriver to complete the entire twisting action.

And the utility model has the following advantages:

First, please refer to Figure 3, by installing a strain gauge 40 that can detect and record the deformation, the utility model can record the data during each processing, thereby judging and integrating the results of each processing Results, errors, etc., through the collection of this data, the utility model can be further matched with various facilities in the factory to achieve the purpose of Industry 4.0.

Second, through the feedback of the torque value, the user can control the torque value transmitted by a single electric screwdriver through the computer. At the same time, the operator who uses the electric screwdriver does not need to prepare multiple electric screwdrivers for using electric screwdrivers with different torques, but can quickly and directly adjust each electric screwdriver through computer control. The current torque limit of the screwdriver.

Thirdly, as shown in FIG. 2 and FIG. 3 , using the torsion sleeve 30 as a device for detecting torque can reduce the equipment wear rate of the electric screwdriver during use, and thus can increase the service life of a single electric screwdriver.

To sum up, the torque control device of the electric screwdriver of the present invention has the advantages of effectively improving the use accuracy, service life and processing efficiency of the electric screwdriver.

The above descriptions are only preferred embodiments of the present utility model, and do not limit the utility model in any form. Although the utility model has been disclosed as above with preferred embodiments, it is not used to limit the utility model. Those who have ordinary knowledge in the technical field, without departing from the scope of the technical solutions of the present invention, may use the technical content disclosed above to make some changes or modifications as equivalent embodiments of equivalent changes, but they do not depart from the scope of the present invention. The content of the new technical solution, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present utility model still belong to the scope of the technical solution of the utility model.

Claims (6)

1. a kind of torque controlling device of electric screw driver, connecting a tool heads, characterized by comprising:

One drive shell, opposite end are respectively a front end and a rear end, and the front end of the drive shell is to connect the work Has head；

One transmission module is set in the drive shell, and can be to drive the tool heads to rotate relative to the drive shell；

One torsion sleeve is set in the drive shell, and connects the drive shell and the transmission module, and can be by the biography The drive of dynamic model block and generate deformation；

An at least strain gauge is set on the torsion sleeve, and respectively this at least the torsion can be detected and be recorded to a strain gauge The deformation of sleeve.

2. the torque controlling device of electric screw driver according to claim 1, which is characterized in that further include at least one Rolling bearing is set in the drive shell, and is sheathed on the transmission module, the medial surface and lateral surface of the rolling bearing It is bonded the transmission module and the inner wall of the drive shell respectively.

3. the torque controlling device of electric screw driver according to claim 1 or 2, which is characterized in that the torsion sleeve is into one Step includes:

Interconnecting piece before one is set to the rear of the transmission module；

Interconnecting piece after one is set to the rear of the preceding interconnecting piece；

One detecting part is set between the preceding interconnecting piece and the rear interconnecting piece, and the thickness of the detecting part is less than the preceding connection The thickness in portion, the thickness of the detecting part are less than the thickness of the rear interconnecting piece, and this at least a strain gauge is set to the detecting part In outside wall surface.

4. the torque controlling device of electric screw driver according to claim 3, which is characterized in that further wrapped on the detecting part Containing a sensing wall and multiple long holes, hole formed therethrough is in the sensing wall at each interval for the long hole, and along the circle of the sensing wall Circumferential direction extends, and respectively an at least strain gauge is set between any two adjacent long holes.

5. the torque controlling device of electric screw driver according to claim 1 or 2, which is characterized in that the torsion sleeve passes through Multiple bolts screw togather the inside for being fixed on the drive shell.

6. the torque controlling device of electric screw driver according to claim 1 or 2, which is characterized in that the transmission module is located at The centre of the tool heads and the torsion sleeve.