TWI767588B - Electric screw driver with clutch and torque measuring module thereof - Google Patents

Abstract

A torque measuring module is disclosed in the present invention. The torque measuring module is applied to an electric screw driver and includes a fixed outer barrel, a planetary gearbox, a shaft, and a torque measuring assembly. The fixed outer barrel is between a motor and a clutch. The planetary gearbox connects to the clutch. The shaft connects to the motor and the clutch along an axial direction. The torque measuring assembly is utilized to measure a shear force and a torsional deformation generated by the planetary gearbox and is utilized to calculate an output torque from the planetary gearbox to the clutch. An electric screw driver with a clutch and the torque measuring module is also disclosed in the present invention.

Description

Clutch type power transmission device and its torque detection module

The present invention relates to a device and a module, in particular to a clutch type power transmission device and a torque detection module thereof.

Electric screw driver is a tool that relies on the input shaft of the power source to provide rotational driving force, and then outputs rotational kinetic energy through the clutch-type power output assembly. Generally, it is often used in the torsion lock attachment of equipment and implements that require locking. The rotational driving force provided by the input shaft of the power source can save the effort of manual rotation operation, shorten the time of the locking process, and improve the operation efficiency, etc. .

In the prior art, the conventional electric screwdriver uses a clutch-type torque adjuster exposed to the outside for the user to turn to adjust the torque. However, the above-mentioned adjustments are approximate values, and it is virtually impossible to accurately know the output torque. torque value.

In addition, there are also electric screwdrivers in the prior art that use strain gauges to detect torque values, wherein the strain gauges are axially arranged on a torsion strain cylinder, and the bending stress of the strain gauges is used to detect the torque values. However, because the strain gauges are arranged on the torsion strain gauge in the axial direction, four strain gauges are usually required, and the structure of the torsion strain gauge also needs to be designed corresponding to the above four strain gauges, so the process steps are more complicated and the cost is also high. higher. In addition, the structure of the above-mentioned torsional strain tube also makes the bending stress more concentrated, which is easy to cause fracture. Therefore, the prior art has room for improvement.

In view of the problems in the prior art that the electric screwdriver cannot accurately know the torque value of the output torque, the process steps are complex, the cost is high, and the bending stress is concentrated, which easily leads to the fracture of the torsional strain tube. One of the main objectives of the present invention is to provide a torque detection module of a clutch type power transmission device to solve at least one problem in the prior art.

In order to solve the problems of the prior art, the necessary technical means adopted by the present invention is to provide a torque detection module of a clutch type power transmission device, which is arranged on a power source input shaft and a clutch type power output assembly, and includes a fixed outer A barrel, a planetary gear set, a power transmission shaft and a torque sensing assembly.

The fixed outer cylinder is arranged between the power source input shaft and the clutch type power output assembly. The planetary gear set connects the clutch type power output assembly. The power transmission shaft connects the power source input shaft and the clutch type power output assembly along an axial direction. The torque sensing component includes a torsional strain tube and at least one strain gauge. The torsional strain cylinder is sleeved on the power transmission shaft and is respectively fixed to the stationary outer cylinder and the planetary gear set. The strain gauge is arranged on the torsion strain tube perpendicular to the axial direction.

Wherein, when a clutch mechanism of the clutch-type power output assembly is in a just-separated state, the strain gauge senses at least a shear strain amount of 45 degrees from the axial clamp caused by the planetary gear set to the torsional strain cylinder, and accordingly Calculate the output torque output from the planetary gear set to one of the clutch PTO components.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is to make the torque detection module of the clutch type power transmission device further include a display interface, and the display interface is electrically connected to the torque sensing component for displaying Torque value of output torque.

On the basis of the above necessary technical means, an auxiliary technical means derived from the present invention is to make the torque detection module of the clutch type power transmission device further include a processing unit, and the processing unit is electrically connected to the torque sensing component for processing Output torque value of output torque, rotation circle value of output torque and action time value of output torque.

On the basis of the above necessary technical means, an auxiliary technical means derived from the present invention is to make the torque detection module of the clutch type power transmission device further include a warning unit, and the warning unit is electrically connected to the processing unit for outputting the torque When a warning condition is triggered, a warning message is generated.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is to make the torque detection module of the clutch type power transmission device further comprise a storage unit, and the storage unit is electrically connected to the processing unit for storing the above-mentioned The torque value of the output torque, the above output The value of the rotation circle of the torque and the action time value of the above-mentioned output torque.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is to make the torque detection module of the clutch type power transmission device further include a communication unit, which is electrically connected to the processing unit for communicating and transmitting out At least one of the above-mentioned torque value of the output torque, the above-mentioned rotation value of the output torque, and the above-mentioned action time value of the output torque.

On the basis of the above necessary technical means, an auxiliary technical means derived from the present invention is to make the torsion strain tube in the torque detection module of the clutch type power transmission device, which comprises an upper cylindrical seat, a lower cylindrical seat and a Extend the cylindrical portion. The upper cylindrical seat is adjacent to the power source input shaft. The lower cylinder seat is adjacent to the clutch type PTO assembly. The extending cylindrical portion is in the shape of a hollow cylinder, and connects the upper cylindrical seat and the lower cylindrical seat along the axial direction, and has a circumferential wall for supplying variable gauge arrangement.

On the basis of the above necessary technical means, an auxiliary technical means derived from the present invention is to make the torsion strain tube in the torque detection module of the clutch type power transmission device, which comprises an upper cylindrical seat, a lower cylindrical seat and a extension. The upper cylindrical seat is adjacent to the power source input shaft. The lower cylinder seat is adjacent to the clutch type PTO assembly. The extension part is hollow, connects the upper cylindrical seat and the lower cylindrical seat along the axial direction, and has two mutually opposite setting surfaces and two mutually opposite opening surfaces, and the setting surfaces are provided for variable gauge setting.

On the basis of the above necessary technical means, an auxiliary technical means derived from the present invention is to make the extension part in the torque detection module of the clutch type power transmission device set a groove on the opening surface, and the above-mentioned groove The groove system extends to the upper cylinder seat and the lower cylinder seat.

On the basis of the above-mentioned necessary technical means, an auxiliary technical means derived from the present invention is to make the extension part in the torque detection module of the clutch type power transmission device have a through hole on the opening surface, and the above-mentioned through hole is formed. The holes pass through the extension.

On the basis of the above necessary technical means, an auxiliary technical means derived from the present invention is to make the setting surfaces in the torque detection module of the clutch type power transmission device parallel to each other, and the opening surfaces to be parallel to each other.

In order to solve the problems of the prior art, the present invention adopts the necessary technical means to provide a clutch type power transmission device, which includes a power source, a clutch type power output assembly and a torque detection module. The power source has a power source input shaft. The torque detection module is arranged on a power source input shaft and a clutch type power output assembly, and includes a fixed outer cylinder, a planetary gear set, a power transmission shaft and a torque sensing assembly.

The fixed outer cylinder is arranged between the power source input shaft and the clutch type power output assembly. The planetary gear set connects the clutch type power output assembly. The power transmission shaft connects the power source input shaft and the clutch type power output assembly along an axial direction. The torque sensing component includes a torsional strain tube and at least one strain gauge. The torsional strain cylinder is sleeved on the power transmission shaft and is respectively fixed to the stationary outer cylinder and the planetary gear set. The strain gauge is arranged on the torsion strain tube perpendicular to the axial direction. Wherein, when a clutch mechanism of the clutch-type power output assembly is in a just-separated state, the strain gauge senses at least a shear strain amount of 45 degrees from the axial clamp caused by the planetary gear set to the torsional strain cylinder, and accordingly Calculate the output torque output from the planetary gear set to one of the clutch PTO components.

Based on the above, the clutch-type power transmission device and the torsion force detection module thereof provided by the present invention utilize the strain gauge vertically and axially disposed on the torsion strain cylinder. Compared with the prior art, the strain gauge system of the present invention senses the planets The shear force strain amount of 45 degrees to the axial clamp caused by the gear set to the torsion strain tube, and based on which the output torque output from the planetary gear set to the clutch-type power output assembly is calculated. The structure of the torsional strain cylinder of the present invention is hollow, and the number of strain gauges is small, so the manufacturing process is relatively simple and the cost is low. In addition, the concentration of the force will be relatively dispersed, therefore, the risk of fracture of the torsional strain tube of the present invention is lower than that of the prior art, and the service life is longer. In addition, the extension part of the torsion strain tube of the present invention further has grooves or through holes on the opening surface, so as to reduce the cross-sectional area and increase the deformation amount under the same torsion force, so that the output torsion force calculated by the strain gauge can be achieved. more precise.

The specific embodiments of the present invention will be described in more detail below with reference to the schematic diagrams. The advantages and features of the present invention will become more apparent from the following description and the scope of the claims. It should be noted that the drawings are all in a very simplified form and use inaccurate scales, and are only used to facilitate and clearly assist the purpose of explaining the embodiments of the present invention.

Please refer to the first to seventh figures, wherein the first figure is a perspective view of the clutch type power transmission device provided by the first embodiment of the present invention; the second figure is the clutch type provided by the first embodiment of the present invention. The exploded view of the power transmission device; the third figure is a partial cross-sectional view of A-A in the first figure; the fourth figure is a cross-sectional schematic view of the clutch-type power output assembly in the just-separated state; the fifth figure is the first figure. B-B sectional view; the sixth figure is a schematic diagram of the torque sensing component of the torque detection module of the clutch type power transmission device provided by the first embodiment of the present invention; and the seventh figure is the first embodiment of the present invention For example, a schematic diagram of the shear force strain generated by the strain gauge of the torque sensing component of the torque sensing module of the clutch type power transmission device provided.

As shown in the figure, a clutch type power transmission device 100 includes a torque detection module 1, a power source 3, a clutch type power output assembly 4, an output end casing 5, a main casing 6, and a signal transmission line assembly 7 and a display box 8. The torque detection module 1 is disposed between the power source 3 and the clutch type power output assembly 4 , and includes a fixed outer cylinder 11 , a planetary gear set 12 , a torque sensing assembly 13 and a power transmission shaft 14 .

The stationary outer cylinder 11 is disposed between a power source input shaft of the power source 3 and the clutch-type power output assembly 4 . The planetary gear set 12 is connected to the clutch type PTO assembly 4 . The power transmission shaft 14 connects the power source input shaft and the clutch type power output assembly 4 along an axial direction D1 .

The torsional force sensing assembly 13 includes a torsional strain gauge 131 and at least one strain gauge, wherein two strain gauges 132a and 132b are drawn and marked in the drawings. The torsional strain cylinder 131 is sleeved on the power transmission shaft 14 and fixed to the stationary outer cylinder 11 and the planetary gear set 12 respectively. The strain gauges 132a and 132b are provided on the torsion strain cylinder 131 perpendicular to the axial direction D1. Because the strain gauges 132a and 132b are in a one-piece structure, they belong to a "plane" in geometry, and the axial direction D1 belongs to a "line". The "strain gauges 132a and 132b described here are disposed on the torsional strain tube 131 perpendicular to the axial direction D1." ” is a direction vector indicating that the normal vector of the strain gauges 132a and 132b is perpendicular to the axial direction D1, which is hereby explained.

Generally speaking, the torque detection module 1 , the power source 3 and the clutch type power output assembly 4 are located in the output housing 5 , the main housing 6 and the display box 8 . The signal transmission line assembly 7 connects the main casing 6 and the display box 8 .

When the clutch structure of the clutch PTO assembly 4 is in a combined state, as shown in the third figure, the output torque of the clutch PTO assembly 4 is the output torque output from the planetary gear set 12 to the clutch PTO assembly 4 .

When the clutch structure of the clutch type power output assembly 4 is in a just-disconnected state, as shown in the fourth figure, the clutch type power output assembly 4 will generate a gap S compared to the third figure, and the power source 3 will stop running. At this time, the strain gauges 132 a and 132 b will sense the amount of shear force strain caused by the planetary gear set 12 to the torsional strain tube 131 , so as to calculate the output torque output from the planetary gear set 12 to the clutch PTO assembly 4 .

In more detail, the planetary gear set 12 includes a sun gear 121 , a plurality of planet gears 122 (four are drawn in the drawing and one of them is indicated) and a ring gear 123 , as shown in FIG. 5 . The radius of the sun tooth 121 is _rs , the radius of the planetary tooth 122 is rp , the radius of the ring tooth 123 is _{r r ,} the center distance between the sun tooth 121 and the planetary tooth 122 is _ro , the output torque is _To , the planetary tooth The force on the center of 122 is F _p , the force on the ring tooth 123 on the pitch radius is Fr , the force on the sun tooth 121 on the pitch _radius is F _s , and the reaction force is _Tr .

Output torque T _o =F _p *r _o , F _p =2F _r =2F _s , r _r = _rs +2rp , r _o = _{rs +r p ,} reaction force T _r =F _r *r _r , therefore , T _r =(F _p /2)*( _rs +2r _p )=[T _o /2*( _rs +r _p )]*( _rs +2r _p ). Through the above description, the strain gauges 132 a and 132 b can deduce the output torque (T _o ) by sensing the reaction force (T _r ) of the ring teeth 123 on the planetary gear set 12 . The above code names are only for the convenience of formula derivation and discussion, and there are too many lines in the section of the diagram. In order to avoid the disorder of the diagram caused by too many lines, it is not marked in the diagram, and is hereby explained.

When the planetary gear set 12 outputs the above-mentioned output torque to the clutch-type power output assembly 4 , the strain gauge 132 a will sense a shear strain amount. A deformation direction of the amount of shear strain will be clamped at 45 degrees to the axial direction D1, as shown in Figure 7. When the output torsion force is generated, the strain gauge 132a will sense the amount of shear force strain and be transformed into the strain gauge 132a' by the amount of shear force strain, as shown in the sixth and seventh figures. Similarly, the strain gauge 132b is also the same, so it will not be repeated here. Therefore, the strain gauges 132a and 132b can sense the amount of shear strain caused by the planetary gear set 12 to the torsional strain cylinder 131 at 45 degrees to the axial direction D1, so as to calculate the output of the planetary gear set 12 to the clutch type power. The output torque of the output assembly 4.

The torsional strain tube 131 includes an upper cylindrical seat 1311 , a lower cylindrical seat 1312 and an extending cylindrical portion 1313 . The upper cylindrical seat 1311 is adjacent to the power source input shaft of the power source 3 . The lower cylinder seat 1312 is adjacent to the clutch type PTO assembly 4 . The extending cylindrical portion 1313 extends along the axial direction D1 and connects the upper cylindrical seat 1311 and the lower cylindrical seat 1312 . In this embodiment, the extending cylindrical portion 1313 is in the shape of a hollow cylinder and has a circumferential wall. The strain gauges 132a and 132b are arranged on the above-mentioned circumferential wall. Generally speaking, the upper cylindrical seat 1311 is the fixed end, and the lower cylindrical seat 1312 is the output rotating end.

In more detail, when the lower cylindrical seat 1312 receives a torque along a first direction D2, the upper cylindrical seat 1311 receives a torque in a second direction D2' opposite to the first direction D2. At this time, the upper left corner of the strain gauge 132a will be subjected to a shear force strain along a deformation direction D3, the lower right corner of the strain gauge 132a will be subjected to a shear force strain along a deformation direction D4, and the lower left corner of the strain gauge 132a will be The upper right corner of the strain gauge 132a is subjected to an amount of shear stress along a deformation direction D5, and thus the strain gauge 132a is deformed into a strain gauge 132a'. Compared with the prior art, the deformation directions D3 and D5 of the shear force strain detected by the present invention are 45 degrees to the axial direction D1', and the deformation directions D4 and D6 of the shear force strain amount are 45 degrees to the axial direction D1. .

Compared with the prior art, since the extending cylindrical portion 1313 of the present embodiment has a hollow cylindrical shape and the number of strain gauges 132a and 132b is small, the manufacturing process is simpler and the cost is lower. In addition, the concentration of the force is also lower than that of the prior art. Therefore, the risk of fracture of the torsional strain tube 131 of the present invention is smaller than that of the prior art, so the service life is better than that of the prior art.

Next, please refer to the second figure, the eighth figure and the ninth figure together, wherein, the eighth figure shows the front view of the clutch type power transmission device provided by the first embodiment of the present invention; and, the ninth figure shows the present invention. A block diagram of the torque detection module of the clutch type power transmission device provided by the first embodiment of the invention. As shown in the figure, the torque detection module 1 further includes a display interface 15 , a processing unit 16 , a warning unit 17 , a storage unit 18 and a communication unit 19 .

The processing unit 16 is electrically connected to the torque sensing component 13 for processing the torque value of the output torque, the rotation circle value of the output torque and the action time value of the output torque. It should be noted that the action time value here represents the time that the planetary gear set 12 continues to output the above-mentioned output torque to the clutch-type power output assembly 4 .

In practice, the sensing signals of the strain gauges 132a and 132b of the torque sensing element 13 (only the strain gauge 132a is indicated in the ninth figure) will pass through a Wheatstone bridge 20 , a signal amplifying circuit 21 , a filter 22 and a digital After the filter 23, it is sent to the processing unit 16.

In more detail, when the amount of shear strain is generated, the resistance of the strain gauges 132a, 132b changes. The Wheatstone bridge 20 converts the resistance change into a voltage change signal. Since the voltage difference of the voltage change signal is very small, the signal amplifying circuit 21 needs to be used to amplify the voltage and the voltage difference. Generally speaking, the magnification usually exceeds 500 times or more. Therefore, after the sensing signal is amplified by the signal amplifying circuit 21 , the filter 22 needs to be used to filter out the noise for the first time. The above-mentioned Wheatstone bridge 20 , the signal amplifying circuit 21 and the filter 22 are usually disposed in the output casing 5 and the main casing 6 .

Next, the sensing signal after the first filtering of the noise by the filter 22 is transmitted to the processing unit 16 through the signal transmission line assembly 7 . In the process of transmission through the signal transmission line assembly 7, the quality of the signal may be affected by the electromagnetic waves generated when the line is pumped. Therefore, the sensing signal will be digitally filtered before being transmitted to the processing unit 16 through the signal transmission line assembly 7. The device 23 is used to improve the signal quality and stability of the sensing signal. The above-mentioned digital filter 23 and the processing unit 16 are usually arranged in the display box 8 .

The display interface 15 is used for displaying the torque value of the output torque, but not limited thereto. The display interface 15 can also display the rotation circle value or the action time value of the output torque. In practice, the display interface 15 is disposed on one of the outer surfaces of the display box 8 . In this embodiment, the torque detection module 1 further includes a button assembly 24 , which is used in conjunction with the display interface 15 for the user to switch the information displayed on the display interface 15 .

The warning unit 17 is electrically connected to the processing unit 16 for generating a warning message when the output torque triggers a warning condition. Warning conditions can be conditions for torque value, rotation circle value or action time value, for example: torque value does not reach a target torque value, torque value does not reach a torque lower limit value, torque value exceeds a torque upper limit value, rotation circle The value is lower than the lower limit of the number of revolutions, the value of the rotation circle is higher than the upper limit of the number of revolutions, the action time value is lower than the lower limit value of the time, and the action time value is higher than the upper limit value of the time. Warning information can be sound, text, vibration, or other information that can warn the user.

The storage unit 18 is electrically connected to the processing unit 16 for storing the torque value, the rotation circle value and the action time value processed by the processing unit 16 .

The communication unit 19 is electrically connected to the processing unit 16 for communicating and transmitting the torque value, the rotation circle value and the action time value processed by the processing unit 16 . The communication unit 19 can transmit the above-mentioned information to a mobile device, a cloud database or any device that can receive the above-mentioned data. The communication unit 19 can use Wi-Fi, Bluetooth, RS232, RS485, USB, RJ45 and other communication interface ports to transmit the above data. In this embodiment, the processing unit 16 , the warning unit 17 , the storage unit 18 and the communication unit 19 are all disposed in the display box 8 .

Therefore, compared with the prior art, the present embodiment utilizes the strain gauges 132a, 132b to be disposed on the torsional strain cylinder 131 perpendicular to the axial direction D1, and senses the clamping between the torsional strain cylinder 131 and the axial direction D1 caused by the planetary gear set 12 The shear force strain of 45 degrees is used to calculate the output torque output from the planetary gear set 12 to the clutch PTO assembly 4 .

Next, please refer to the second figure, the tenth figure and the eleventh figure, wherein, the tenth figure is a three-dimensional view of the torque sensing device provided by the second embodiment of the present invention; and the eleventh figure shows the Section C-C of Figure 10. As shown in the figure, a torsional force sensing assembly 13a includes a torsional strain tube 131a and strain gauges 132a and 132b, wherein the strain gauges 132a and 132b are arranged in the same manner as in the first embodiment and sense the amount of shear strain. , will not go into details.

The torsional strain tube 131a includes an upper cylindrical seat 1311a, a lower cylindrical seat 1312a and an extension portion 1313a. The extending portion 1313a connects the upper cylindrical seat 1311a and the lower cylindrical seat 1312a along the axial direction D1, and has two mutually opposite setting surfaces S1a, S1b and two mutually opposite opening surfaces S2a, S2b. As shown in FIG. 11, the extending portion 1313a is hollow, the setting surface S1a is parallel to the setting surface S1b, and the opening surface S2a is parallel to the opening surface S2b.

In this embodiment, the strain gauge 132a is provided on the setting surface S1a, and the strain gauge 132b is provided on the setting surface S1b. The torsional strain tube 131a has a groove Ta and a groove Tb respectively formed on the opening surface S2a and the opening surface S2b, and the grooves Ta and Tb extend to the upper cylindrical seat 1311a and the lower cylindrical seat 1312a respectively. After the grooves Ta and Tb are opened in the torsional strain tube 131a, the cross-sectional area is reduced, so the deformation amount under the same torsion force will increase, so the amount of shear force strain sensed by the strain gauges 132a, 132b is larger and the calculated output torsion force will be more precise.

Finally, please refer to the second figure, the twelfth figure and the thirteenth figure together, wherein, the twelfth figure is a three-dimensional view showing the torque sensing device provided by the third embodiment of the present invention; and, the thirteenth figure It shows the D-D sectional view of the twelfth figure. As shown in the figure, a torsional force sensing assembly 13b includes a torsional strain tube 131b and strain gauges 132a, 132b, wherein the strain gauges 132a, 132b are arranged in the same manner as in the first embodiment and sense the amount of shear strain , will not go into details.

The torsional strain cylinder 131b includes an upper cylindrical seat 1311b, a lower cylindrical seat 1312b and an extension portion 1313b. The extending portion 1313b connects the upper cylindrical seat 1311b and the lower cylindrical seat 1312b along the axial direction D1, and has two mutually opposite setting surfaces S1a, S1b and two mutually opposite opening surfaces S2a, S2b. As shown in FIG. 13, the extending portion 1313b is hollow, the setting surface S1a is parallel to the setting surface S1b, and the opening surface S2a is parallel to the opening surface S2b.

In this embodiment, the strain gauge 132a is provided on the setting surface S1a, and the strain gauge 132b is provided on the setting surface S1b. In this embodiment, the torsional strain tube 131b has a through hole Ha and a through hole Hb respectively formed on the opening surface S2a and the opening surface S2b, wherein the through holes Ha and Hb respectively penetrate the extending portion 1313b. Different from the second embodiment, the through holes Ha and Hb do not extend to the upper cylindrical seat 1311b and the lower cylindrical seat 1312b. The through-holes Ha and Hb have a weakening effect, so the output torque calculated by the strain gauges 132a and 132b will be more accurate.

To sum up, the clutch-type power transmission device and the torsion detection module thereof provided by the present invention utilize the strain gauge to be disposed on the torsion strain cylinder in the vertical axis. Compared with the prior art, the strain gauge of the present invention senses The planetary gear set causes a shear strain of 45 degrees to the axial clamp caused by the torsional strain tube, and based on this, the output torque output from the planetary gear set to the clutch-type power output assembly is calculated. The structure of the torsional strain cylinder of the present invention is hollow, and the number of strain gauges is small, so the manufacturing process is relatively simple and the cost is low. In addition, the concentration of the force will be relatively dispersed, therefore, the risk of fracture of the torsional strain tube of the present invention is lower than that of the prior art, and the service life is longer. In addition, the extension part of the torsion strain tube of the present invention further has grooves or through holes on the opening surface, so as to reduce the cross-sectional area and increase the deformation amount under the same torsion force, so that the output torsion force calculated by the strain gauge can be achieved. more precise.

Through the detailed description of the preferred embodiments above, it is hoped that the features and spirit of the present invention can be described more clearly, and the scope of the present invention is not limited by the preferred embodiments disclosed above. On the contrary, the intention is to cover various modifications and equivalent arrangements within the scope of the claimed scope of the present invention.

100: Clutch-type power transmission 1: Torque detection module 11: Fixed outer cylinder 12: Planetary gear set 121: Sun tooth 122: Planetary gear 123: Ring tooth 13, 13a, 13b: Torque Sensing Assembly 131, 131a, 131b: Torsional strain gauges 1311, 1311a, 1311b: Upper cylinder seat 1312, 1312a, 1312b: Lower cylinder seat 1313: Extended cylindrical part 1313a, 1313b: Extensions 132a, 132a’, 132b: Strain gauges 14: Power transmission shaft 15: Display interface 16: Processing unit 17: Warning unit 18: Storage unit 19: Communication unit 20: Wheatstone bridge 21: Signal amplifier circuit 22: Filter 23: Digital Filter 24: Button Components 3: Power source 4: Clutch PTO components 5: Output shell 6: Main shell 7: Signal transmission line components 8: Display box D1, D1': Axial D2: first direction D2': the second direction D3, D4, D5, D6: Deformation direction Ha,Hb: through hole S: Clearance S1a, S1b: set face S2a, S2b: Open face Ta, Tb: groove

The first figure is a perspective view showing the clutch type power transmission device provided by the first embodiment of the present invention; The second figure is an exploded view showing the clutch type power transmission device provided by the first embodiment of the present invention; The third figure is a partial cross-sectional view of A-A of the first figure; The fourth figure is a schematic cross-sectional view showing the clutch-type power output assembly in the just-separated state; The fifth figure shows the B-B sectional view of the first figure; The sixth figure is a schematic diagram showing the torque sensing component of the torque detection module of the clutch type power transmission device provided by the first embodiment of the present invention; Fig. 7 is a schematic diagram showing the shear force strain generated by the strain gauge of the torsion sensing component of the torsion detection module of the clutch type power transmission device according to the first embodiment of the present invention; Figure 8 is a front view of the clutch-type power transmission device provided by the first embodiment of the present invention; Fig. 9 is a block diagram showing the torque detection module of the clutch type power transmission device provided by the first embodiment of the present invention; FIG. 10 is a perspective view showing the torque sensing device provided by the second embodiment of the present invention; The eleventh figure shows the C-C sectional view of the tenth figure; FIG. 12 is a perspective view showing the torque sensing device provided by the third embodiment of the present invention; and The thirteenth figure shows the D-D sectional view of the twelfth figure.

100: Clutch-type power transmission

1: Torque detection module

11: Fixed outer cylinder

12: Planetary gear set

13: Torque Sensing Components

131: Torsional strain gauge

132a, 132b: Strain gauges

14: Power transmission shaft

3: Power source

4: Clutch PTO components

5: Output shell

6: Main shell

7: Signal transmission line components

8: Display box

D1: Axial

Claims (12)

A torque detection module of a clutch type power transmission device is arranged on a power source input shaft and a clutch type power output assembly, and includes: a fixed outer cylinder disposed between the power source input shaft and the clutch-type power output assembly; a planetary gear set connected to the clutch type power output assembly; a power transmission shaft connecting the power source input shaft and the clutch-type power output assembly along an axial direction; and A torque sensing assembly, including: a torsion strain cylinder sleeved on the power transmission shaft and fixed to the stationary outer cylinder and the planetary gear set respectively; and at least one strain gauge, which is perpendicular to the axial direction and is disposed on the torsion strain cylinder; Wherein, when a clutch mechanism of the clutch type power output assembly is in a just-separated state, the at least one strain gauge senses at least one difference between the torsion strain tube caused by the planetary gear set and the axial clamp by 45 degrees. The shear force strain is calculated, and the output torque output from the planetary gear set to one of the clutch-type power output components is calculated accordingly. The torque detection module of the clutch type power transmission device as claimed in claim 1 further comprises a display interface, the display interface is electrically connected to the torque sensing component for displaying the torque value of the output torque. The torque detection module of the clutch type power transmission device as claimed in claim 1, further comprising a processing unit, the processing unit is electrically connected to the torque sensing component for processing the torque value of the output torque, the output torque The value of the rotation circle of the torque and the action time of the output torque. The torque detection module of the clutch type power transmission device as claimed in claim 3, further comprising a warning unit, the warning unit is electrically connected to the processing unit for generating a warning when the output torque triggers a warning condition News. The torque detection module of the clutch type power transmission device as claimed in claim 3 further comprises a storage unit, which is electrically connected to the processing unit and used to store the torque value of the output torque and the output torque. The value of the rotation circle and the action time value of the above-mentioned output torque. The torque detection module of the clutch type power transmission device as claimed in claim 3, further comprising a communication unit, which is electrically connected to the processing unit for communicating and transmitting the torque value of the output torque, the torque value of the output torque, and the At least one of the rotation circle value of the output torque and the above-mentioned action time value of the output torque. The torque detection module of a clutch type power transmission device as claimed in claim 1, wherein the torsion strain tube comprises: an upper cylindrical seat, which is adjacent to the power source input shaft; a lower cylinder seat adjacent to the clutch PTO assembly; and An extending cylindrical portion is in the shape of a hollow cylinder, connects the upper cylindrical seat and the lower cylindrical seat along the axial direction, and has a peripheral wall for arranging the at least one strain gauge. The torque detection module of a clutch type power transmission device as claimed in claim 1, wherein the torsion strain gauge comprises: an upper cylindrical seat adjacent to the input shaft of the power source; a lower cylinder seat adjacent to the clutch PTO assembly; and An extension part, which is hollow, connects the upper cylindrical seat and the lower cylindrical seat along the axial direction, and has two mutually opposite setting surfaces and two mutually opposite opening surfaces, and the setting surfaces are used for the at least A strain gauge setting. The torque detection module of a clutch type power transmission device as claimed in claim 8, wherein the extending portion defines a groove on each of the opening surfaces, and the groove extends to the upper cylindrical seat and the The lower cylinder seat. The torque detection module of the clutch type power transmission device as claimed in claim 8, wherein the extending portion is provided with a through hole on each of the opening surfaces, and the through hole penetrates the extending portion. The torque detection module of the clutch type power transmission device according to claim 8, wherein the setting surfaces are parallel to each other, and the opening surfaces are parallel to each other. A clutch type power transmission device, comprising: a power source having a power source input shaft; a clutch type power output assembly; A torque detection module is arranged on the power source and the clutch-type power output assembly, and includes: a fixed outer cylinder disposed between the power source input shaft and the clutch-type power output assembly; a planetary gear set connected to the clutch type power output assembly; a power transmission shaft connecting the power source input shaft and the clutch type power output assembly along an axial direction; and A torque sensing assembly, including: a torsion strain cylinder sleeved on the power transmission shaft and fixed to the stationary outer cylinder and the planetary gear set respectively; and at least one strain gauge is arranged on the torsion strain cylinder perpendicular to the axial direction; Wherein, when a clutch mechanism of the clutch-type power output assembly is in a just-separated state, the at least one strain gauge senses at least one difference between the torsion strain tube caused by the planetary gear set and the axial clamp by 45 degrees. The shear force strain is calculated, and the output torque output from the planetary gear set to one of the clutch-type power output components is calculated accordingly.

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