Clutch type power transmission device and torque detection module thereof

Abstract

The present invention provides a torque detection module of a clutch-type power transmission device, comprising a fixed outer cylinder, a planetary gear set, a power transmission shaft and a torque sensing component. The fixed outer cylinder is arranged between a power source input shaft and a clutch-type power output component. The planetary gear set connects the clutch-type power output component. The power transmission shaft connects the power source input shaft and the clutch-type power output component along an axial direction. A torque strain cylinder of the torque sensing component is sleeved on the power transmission shaft. A strain gauge of the torque sensing component is arranged perpendicular to the axial direction on the torque strain cylinder to sense a shear strain amount caused by the planetary gear set on the torque strain cylinder at a 45-degree angle to the axial direction, and thereby achieves the effect of calculating an output torque output by the planetary gear set to the clutch-type power output component.

Description

Technical Field

[0001] The present invention relates to a device and a module, and in particular to a clutch-type power transmission device and a torque detection module thereof. Background Art

[0002] An electric screw driver is a tool that relies on a power source input shaft to provide a rotational driving force, and then outputs rotational kinetic energy through a clutch-type power output component. It is generally used in torque locking of equipment and tools that require locking. The rotational driving force provided by the power source input shaft can save the effort consumed by manual rotation operations, shorten the locking process time, and improve operating efficiency.

[0003] In the prior art, conventional electric screwdrivers utilize a clutch-type torque adjuster exposed on the outside for users to turn and adjust the torque. However, the above adjustment is an approximate value, and the torque value of the output torque cannot be accurately known.

[0004] In addition, there are also electric screwdrivers in the prior art that use strain gauges to detect torque values, wherein the strain gauge is axially arranged on a torque strain tube, and the torque value is detected using the bending stress (bending) of the strain gauge. However, because the strain gauge is axially arranged on the torque strain tube, four strain gauges are usually required, and the structure of the torque strain tube also needs to be designed corresponding to the above four strain gauges, so the process steps are more complicated and the cost will also be higher. In addition, the structure of the above torque strain tube will also make the bending stress more concentrated, which is easy to cause breakage. Therefore, the prior art has room for improvement. Summary of the invention

[0005] In view of the various problems in the prior art, electric screwdrivers have the problems of being unable to accurately know the torque value of the output torque, complicated process steps, high cost, and concentrated bending stress that easily leads to the fracture of the torque strain tube. A main purpose of the present invention is to provide a torque detection module for a clutch-type power transmission device to solve at least one problem in the prior art.

[0006] The present invention solves the problems of the prior art and adopts necessary technical means 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 component and includes a fixed outer cylinder, a planetary gear set, a power transmission shaft and a torque sensing component.

[0007] The fixed outer cylinder is arranged between the power source input shaft and the clutch power output assembly. The planetary gear set is connected to the clutch power output assembly. The power transmission shaft connects the power source input shaft and the clutch power output assembly along an axial direction. The torque sensing assembly includes a torque strain cylinder and at least one strain gauge. The torque strain cylinder is sleeved on the power transmission shaft and fixed to the fixed outer cylinder and the planetary gear set respectively. The strain gauge is arranged on the torque strain cylinder perpendicular to the axial direction.

[0008] When a clutch mechanism of the clutch power output assembly is in a just-released state, the strain gauge senses at least one shear strain at 45 degrees to the axial direction caused by the planetary gear set on the torque strain cylinder, and calculates an output torque output by the planetary gear set to the clutch power output assembly accordingly.

[0009] Based on 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 also include a display interface, which is electrically connected to the torque sensing component to display the torque value of the output torque.

[0010] 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 also include a processing unit, which is electrically connected to the torque sensing component to process the torque value of the output torque, the rotation circle value of the output torque and the action time value of the output torque.

[0011] 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 also include a warning unit, which is electrically connected to the processing unit to generate a warning message when the output torque triggers a warning condition.

[0012] 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 also include a storage unit, the storage unit is electrically connected to the processing unit, and is used to store all the above-mentioned torque values ​​of the output torque, all the above-mentioned rotation circle values ​​of the output torque and all the above-mentioned output torque action time values.

[0013] 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 also include a communication unit, the communication unit is electrically connected to the processing unit, and is used to communicate and transmit at least one of the torque value of the above-mentioned output torque, the rotation circle value of the above-mentioned output torque and the action time value of the above-mentioned output torque.

[0014] Based on the above necessary technical means, an auxiliary technical means derived from the present invention is to make the torque strain cylinder in the torque detection module of the clutch type power transmission device include an upper cylinder seat, a lower cylinder seat and an extended cylinder portion. The upper cylinder seat is adjacent to the power source input shaft. The lower cylinder seat is adjacent to the clutch type power output assembly. The extended cylinder portion is hollow cylindrical and connects the upper cylinder seat and the lower cylinder seat along the axial direction, and has a circumferential wall for providing a variable gauge setting.

[0015] Based on the above necessary technical means, an auxiliary technical means derived from the present invention is to make the torque strain cylinder in the torque detection module of the clutch-type power transmission device include an upper cylindrical seat, a lower cylindrical seat and an extension. The upper cylindrical seat is adjacent to the power source input shaft. The lower cylindrical seat is adjacent to the clutch-type power output assembly. The extension is hollow, axially connecting the upper cylindrical seat and the lower cylindrical seat, and having two mutually opposite setting surfaces and two mutually opposite opening surfaces, and the setting surface is provided with a variable gauge setting.

[0016] Based on 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 have a groove on the opening surface, and the above grooves extend to the upper cylindrical seat and the lower cylindrical seat.

[0017] Based on the above necessary technical means, an auxiliary technical means derived from the present invention is to provide an extension portion in the torque detection module of the clutch-type power transmission device with a through hole on the opening surface, and the through hole passes through the extension portion.

[0018] 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 are parallel to each other.

[0019] The present invention solves the problems of the prior art, and the necessary technical means adopted are to provide a clutch-type power transmission device, which includes a power source, a clutch-type power output component 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 component, and includes a fixed outer cylinder, a planetary gear set, a power transmission shaft and a torque sensing component.

[0020] The fixed outer cylinder is arranged between the power source input shaft and the clutch power output assembly. The planetary gear set connects the clutch power output assembly. The power transmission shaft connects the power source input shaft and the clutch power output assembly along an axial direction. The torque sensing assembly includes a torque strain cylinder and at least one strain gauge. The torque strain cylinder is sleeved on the power transmission shaft and fixed to the fixed outer cylinder and the planetary gear set respectively. The strain gauge is arranged perpendicular to the axial direction on the torque strain cylinder. Among them, when a clutch mechanism of the clutch power output assembly is in a just-disengaged state, the strain gauge senses at least one shear strain amount of 45 degrees to the axial direction caused by the planetary gear set on the torque strain cylinder, and calculates an output torque output by the planetary gear set to the clutch power output assembly accordingly.

[0021] As mentioned above, the clutch-type power transmission device and its torque detection module provided by the present invention utilize a strain gauge vertically axially arranged on the torsion strain tube. Compared with the prior art, the strain gauge of the present invention senses the shear strain amount caused by the planetary gear set on the torsion strain tube at 45 degrees to the axial direction, and calculates the output torque output by the planetary gear set to the clutch power output component. The structure of the torsion strain tube of the present invention is hollow, and the number of strain gauges is small, so the process is simpler and the cost is lower. In addition, the concentration of force will also be more dispersed, so the risk of fracture of the torsion strain tube of the present invention will be lower than that of the prior art, and the service life will be longer. In addition, the extension part of the torsion strain tube of the present invention is further provided with a groove or a through hole on the opening surface, so as to achieve the effect of reducing the cross-sectional area and increasing the deformation amount under the same torque, so that the output torque calculated by the strain gauge is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a perspective view showing a clutch-type power transmission device provided by a first embodiment of the present invention;

[0023] Figure 2 is an exploded view showing a clutch-type power transmission device provided by a first embodiment of the present invention;

[0024] Figure 3 Yes Display Figure 1 A─A partial cross-sectional view;

[0025] Figure 4 is a cross-sectional schematic diagram showing a clutch-type power output assembly in a just-released state;

[0026] Figure 5 Yes Display Figure 1 B─B section of

[0027] Figure 6 is a schematic diagram showing a torque sensing component of a torque detection module of a clutch-type power transmission device provided in a first embodiment of the present invention;

[0028] Figure 7 is a schematic diagram showing the shear strain generated by the strain gauge 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;

[0029] Figure 8 is a front view showing a clutch-type power transmission device provided by a first embodiment of the present invention;

[0030] Fig. 9 is a block diagram showing a torque detection module of a clutch-type power transmission device provided in a first embodiment of the present invention;

[0031] Fig.10 is a three-dimensional diagram showing a torque sensing assembly provided by a second embodiment of the present invention;

[0032] Fig.11 Yes Display Fig.10 C─C section of

[0033] Fig.12 is a three-dimensional diagram showing a torque sensing assembly provided by a third embodiment of the present invention; and

[0034] Fig.13 Yes Display Fig.12 D─D cross-section diagram.

[0035] Explanation of symbols

[0036] 100: Clutch type power transmission device

[0037] 1: Torque detection module

[0038] 11: Fixed outer cylinder

[0039] 12: Planetary gear set

[0040] 121: Sun gear

[0041] 122: Planetary gear

[0042] 123: Ring gear

[0043] 13,13a,13b: Torque sensing components

[0044] 131,131a,131b: Torsion strain gauge

[0045] 1311,1311a,1311b: Upper cylindrical seat

[0046] 1312,1312a,1312b: Lower cylindrical seat

[0047] 1313: Extended cylindrical portion

[0048] 1313a, 1313b: extension

[0049] 132a, 132a', 132b: Strain gauge

[0050] 14: Power transmission shaft

[0051] 15: Display interface

[0052] 16: Processing Unit

[0053] 17: Warning unit

[0054] 18: Storage Unit

[0055] 19: Communication unit

[0056] 20: Wheatstone bridge

[0057] 21:Signal amplifier circuit

[0058] 22: Filter

[0059] 23: Digital filter

[0060] 24: Button component

[0061] 3: Power source

[0062] 4: Clutch power output assembly

[0063] 5: Output end housing

[0064] 6: Main shell

[0065] 7:Signal transmission line components

[0066] 8: Display box

[0067] D1, D1': Axial

[0068] D2: First direction

[0069] D2': Second direction

[0070] D3, D4, D5, D6: Deformation direction

[0071] Ha,Hb:Through hole

[0072] S: Clearance

[0073] S1a, S1b: Setting surface

[0074] S2a, S2b: Opening surface

[0075] Ta,Tb: Groove DETAILED DESCRIPTION

[0076] The specific implementation of the present invention will be described in more detail below in conjunction with the schematic diagram. The advantages and features of the present invention will become more apparent from the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in exact proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0077] See also Figures 1 to 7 ,in, Figure 1 is a perspective view showing a clutch-type power transmission device provided by a first embodiment of the present invention; Figure 2 is an exploded view showing a clutch-type power transmission device provided by a first embodiment of the present invention; Figure 3 Yes Display Figure 1 A─A partial cross-sectional view; Figure 4 is a cross-sectional schematic diagram showing a clutch-type power output assembly in a just-released state; Figure 5 Yes Display Figure 1 B─B section of Figure 6 is a schematic diagram showing a torque sensing component of a torque detection module of a clutch-type power transmission device provided in a first embodiment of the present invention; and, Figure 7 It is a schematic diagram showing the shear strain generated by the strain gauge of the torque sensing component of the torque detection module of the clutch-type power transmission device provided in the first embodiment of the present invention.

[0078] 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 housing 5, a main housing 6, 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.

[0079] The fixed outer cylinder 11 is disposed between a power source input shaft of the power source 3 and the clutch power output assembly 4. The planetary gear set 12 is connected to the clutch power output assembly 4. The power transmission shaft 14 connects the power source input shaft and the clutch power output assembly 4 along an axial direction D1.

[0080] The torque sensing assembly 13 includes a torque strain tube 131 and at least one strain gauge, wherein the accompanying drawing shows and indicates two strain gauges 132a and 132b. The torque strain tube 131 is sleeved on the power transmission shaft 14 and fixed to the fixed outer tube 11 and the planetary gear set 12 respectively. The strain gauges 132a and 132b are arranged on the torque strain tube 131 perpendicular to the axial direction D1. Since the strain gauges 132a and 132b are in a sheet-like structure, they belong to "surface" in geometry, and the axial direction D1 belongs to "line", the description of "the strain gauges 132a and 132b are arranged on the torque strain tube 131 perpendicular to the axial direction D1" here means that the normal vectors of the strain gauges 132a and 132b will be perpendicular to the direction vector of the axial direction D1, which is specially explained.

[0081] Generally speaking, the torque detection module 1, the power source 3 and the clutch type power output assembly 4 are located in the output end housing 5, the main housing 6 and the display box 8. The signal transmission line assembly 7 connects the main housing 6 and the display box 8.

[0082] When the clutch structure of the clutch power output assembly 4 is in a coupled state, such as Figure 3 As shown, the output torque of the clutch power output assembly 4 is the output torque output by the planetary gear set 12 to the clutch power output assembly 4 .

[0083] When the clutch structure of the clutch power output assembly 4 is in a just-released state, such as Figure 4 As shown, the clutch type power output assembly 4 is compared with Figure 3 A gap S will be generated, and the power source 3 will stop running. At this time, the strain gauges 132a and 132b will sense the shear strain caused by the planetary gear set 12 on the torsion strain tube 131, and calculate the output torque output by the planetary gear set 12 to the clutch power output assembly 4.

[0084] In more detail, the planetary gear set 12 includes a sun gear 121, a plurality of planetary gears 122 (four of which are shown in the figure and one of which is indicated schematically), and a ring gear 123. Figure 5 As shown. The radius of the sun tooth 121 is r s , the radius of the planetary gear 122 is r p , the radius of the ring tooth 123 is r r , the distance between the sun gear 121 and the planet gear 122 is r o , the output torque is T o , the force on the center of planetary gear 122 is F p , the force on the ring gear 123 at the pitch radius is F r , the force on sun gear 121 at the pitch radius is F s , the reaction force is T r .

[0085] Output torque T o =F p *r o , F p =2F r =2F s , r r =r s +2r p , r o =r s +r p , reaction force T r =F r *r r , therefore, T r =(F p / 2)*(r s +2r p )=[T o / 2*(r s +r p )]*(r s +2r p ). Based on the above description, the strain gauges 132a, 132b can sense the reaction force (T r ) and then the output torque (T o ). The above codes are only for the convenience of formula derivation and discussion, and there are too many cross-sectional lines in the attached drawings. In order to avoid the disorder of the attached drawings caused by too many lines, they are not marked in the attached drawings. This is specially explained.

[0086] When the planetary gear set 12 outputs the output torque to the clutch power output assembly 4, the strain gauge 132a senses a shear strain. A deformation direction of the shear strain is 45 degrees from the axial direction D1. Figure 7 When the output torque is generated, the strain gauge 132a will sense the shear strain and be deformed into the strain gauge 132a' by the shear strain. Figure 6 and Figure 7 As shown. Similarly, the strain gauge 132b is also the same, so no further description is given. Therefore, the strain gauges 132a and 132b can sense the shear strain at 45 degrees to the axial direction D1 caused by the planetary gear set 12 on the torque strain tube 131, and calculate the output torque output by the planetary gear set 12 to the clutch power output assembly 4.

[0087] The torsion strain cylinder 131 includes an upper cylindrical seat 1311, a lower cylindrical seat 1312 and an extended cylindrical portion 1313. The upper cylindrical seat 1311 is adjacent to the power source input shaft of the power source 3. The lower cylindrical seat 1312 is adjacent to the clutch-type power output assembly 4. The extended 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 extended cylindrical portion 1313 is a hollow cylindrical shape 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 a fixed end, and the lower cylindrical seat 1312 is an output rotating end.

[0088] In more detail, when the lower cylindrical seat 1312 is subjected to a torque along a first direction D2, the upper cylindrical seat 1311 will be subjected to 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 strain along a deformation direction D3, the lower right corner of the strain gauge 132a will be subjected to a shear strain along a deformation direction D4, the lower left corner of the strain gauge 132a will be subjected to a shear strain along a deformation direction D5, and the upper right corner of the strain gauge 132a will be subjected to a shear strain along a deformation direction D6, so the strain gauge 132a will be deformed into the strain gauge 132a'. Compared with the prior art, the deformation directions D3 and D5 of the shear strain detected by the present invention will be 45 degrees with the axial direction D1', and the deformation directions D4 and D6 of the shear strain will be 45 degrees with the axial direction D1.

[0089] Compared to the prior art, since the extended cylindrical portion 1313 of this embodiment is in the shape of a hollow cylinder and the number of strain gauges 132a and 132b is small, the manufacturing process will be simpler and the cost will be lower. In addition, the concentration of force will be lower than that of the prior art, so the risk of the torsion strain tube 131 of the present invention breaking will be lower than that of the prior art, so the service life will be better than that of the prior art.

[0090] Next, please also refer to Figure 2 , Figure 8 and Fig. 9 ,in, Figure 8 is a front view showing a clutch-type power transmission device provided by a first embodiment of the present invention; and, Fig. 9 1 is a block diagram showing a torque detection module of a clutch type power transmission device according to a first embodiment of the present 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.

[0091] The processing unit 16 is electrically connected to the torque sensing assembly 13 to process 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 duration of the planetary gear set 12 outputting the output torque to the clutch power output assembly 4.

[0092] In practice, the strain gauges 132a, 132b ( Fig. 9 The sensing signal of the strain gauge 132 a is transmitted to the processing unit 16 through a Wheatstone bridge 20 , a signal amplifying circuit 21 , a filter 22 and a digital filter 23 .

[0093] In more detail, when the shear strain is generated, the resistance of the strain gauges 132a and 132b will change. The Wheatstone bridge 20 will convert the change in resistance into a voltage change signal. Since the voltage difference of the above-mentioned voltage change signal is very small, it is necessary to use a signal amplifier circuit 21 to amplify the voltage and the pressure difference. Generally speaking, the amplification factor is usually more than 500 times. Therefore, after the sensing signal is amplified by the signal amplifier circuit 21, it is necessary to use a filter 22 to filter out the noise for the first time. The above-mentioned Wheatstone bridge 20, signal amplifier circuit 21 and filter 22 are usually arranged in the output end housing 5 and the main housing 6.

[0094] Next, the sensing signal after the noise is filtered out for the first time by the filter 22 is transmitted to the processing unit 16 via the signal transmission line assembly 7. During the transmission process via the signal transmission line assembly 7, the quality of the signal may be affected by the electromagnetic waves generated by the line when the line is unloaded. Therefore, before the sensing signal is transmitted to the processing unit 16 via the signal transmission line assembly 7, it will first pass through the digital filter 23 to improve the signal quality and stability of the sensing signal. The digital filter 23 and the processing unit 16 are usually disposed in the display box 8.

[0095] The display interface 15 is used to display the torque value of the output torque, but is 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 with the display interface 15 for the user to switch the information displayed on the display interface 15.

[0096] The warning unit 17 is electrically connected to the processing unit 16, and is used to generate a warning message when the output torque triggers a warning condition. The warning condition can be a condition for the torque value, the rotation circle value or the action time value, for example: the torque value does not reach a target torque value, the torque value does not reach a torque lower limit value, the torque value exceeds a torque upper limit value, the rotation circle value is lower than a rotation lower limit value, the rotation circle value is higher than a rotation upper limit value, the action time value is lower than a time lower limit value, the action time value is higher than a time upper limit value, etc. The warning message can be sound, text, vibration or other information that can warn the user.

[0097] The storage unit 18 is electrically connected to the processing unit 16 , and is used to store the torque value, the rotation circle value, and the action time value processed by the processing unit 16 .

[0098] The communication unit 19 is electrically connected to the processing unit 16 to communicate and transmit 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 information to a mobile device, a cloud database or any device that can receive the above data. The communication unit 19 can use Wi-Fi, Bluetooth, RS232, RS485, USB, RJ45 and other communication interfaces 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.

[0099] Therefore, compared with the prior art, the present embodiment utilizes strain gauges 132a and 132b to be disposed on the torsion strain tube 131 perpendicular to the axial direction D1, and senses the shear strain amount at 45 degrees to the axial direction D1 caused by the planetary gear set 12 on the torsion strain tube 131, thereby calculating the output torque output by the planetary gear set 12 to the clutch power output assembly 4.

[0100] Next, please also refer to Figure 2 , Fig.10 and Fig.11 ,in, Fig.10 is a three-dimensional diagram showing a torque sensing assembly provided by a second embodiment of the present invention; and, Fig.11 Yes Display Fig.10 As shown in the figure, a torque sensing assembly 13a includes a torque strain tube 131a and strain gauges 132a, 132b, wherein the strain gauges 132a, 132b are arranged in the same manner as in the first embodiment and the manner of sensing the shear strain is the same, and will not be described in detail.

[0101] The torsion strain tube 131a includes an upper cylindrical seat 1311a, a lower cylindrical seat 1312a and an extension portion 1313a. The extension 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 and S1b and two mutually opposite opening surfaces S2a and S2b. Fig.11 As shown, the extension 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.

[0102] In this embodiment, the strain gauge 132a is disposed on the setting surface S1a, and the strain gauge 132b is disposed on the setting surface S1b. The torsion 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 torsion strain tube 131a has grooves Ta and Tb formed, the cross-sectional area is reduced, so the deformation under the same torque will increase, so the shear strain sensed by the strain gauges 132a and 132b will be larger and the calculated output torque will be more accurate.

[0103] Finally, please also read Figure 2 , Fig.12 and Fig.13 ,in, Fig.12 is a three-dimensional diagram showing a torque sensing assembly provided by a third embodiment of the present invention; and, Fig.13 Yes Display Fig.12 As shown in the figure, a torque sensing assembly 13b includes a torque 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 the manner of sensing the shear strain is the same, and will not be described in detail.

[0104] The torsion strain tube 131b includes an upper cylindrical seat 1311b, a lower cylindrical seat 1312b and an extension portion 1313b. The extension 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 and S1b and two mutually opposite opening surfaces S2a and S2b. Fig.13 As shown, the extension 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.

[0105] In this embodiment, the strain gauge 132a is disposed on the setting surface S1a, and the strain gauge 132b is disposed on the setting surface S1b. In this embodiment, the torsion 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 extension 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.

[0106] In summary, the clutch-type power transmission device and its torque detection module provided by the present invention utilize strain gauges perpendicular to the axial direction and are arranged on the torsion strain tube. Compared with the prior art, the strain gauges of the present invention sense the shear strain amount caused by the planetary gear set on the torsion strain tube at 45 degrees to the axial direction, and calculate the output torque output by the planetary gear set to the clutch power output assembly accordingly. The structure of the torsion strain tube of the present invention is hollow, and the number of strain gauges is small, so the process is simpler and the cost is lower. In addition, the concentration of force will also be more dispersed, so the risk of fracture of the torsion strain tube of the present invention will be lower than that of the prior art, and the service life will be longer. In addition, the extension portion of the torsion strain tube of the present invention is further provided with a groove or a through hole on the opening surface, so as to achieve the effect of reducing the cross-sectional area and increasing the deformation amount under the same torque, so that the output torque calculated by the strain gauge is more accurate.

[0107] Through the detailed description of the preferred embodiments above, it is hoped that the features and spirit of the present invention can be more clearly described, and the scope of the present invention is not limited by the preferred embodiments disclosed above. On the contrary, its purpose is to cover various changes and arrangements with equivalents within the scope of the claims of the present invention.

Claims

1. A torque detection module of a clutch-type power transmission device, disposed between a power source input shaft and a clutch-type power output assembly, and comprising: 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 axially connecting the power source input shaft and the clutch-type power output assembly; and Torque sensing assembly, comprising: The torsion strain cylinder is sleeved on the power transmission shaft and fixed to the fixed outer cylinder and the planetary gear set respectively, and comprises: an upper cylindrical seat, adjacent to the power source input shaft; a lower cylindrical seat adjacent to the clutched power output assembly; and The extended cylindrical portion is in a hollow cylindrical shape and connects the upper cylindrical seat and the lower cylindrical seat along the axial direction, and has a circumferential wall for arranging at least one strain gauge; and The at least one strain gauge is disposed on the torsion strain cylinder perpendicular to the axial direction; in, When the clutch mechanism of the clutch power output assembly is in a just-released state, the at least one strain gauge senses at least one shear strain at 45 degrees to the axial direction caused by the planetary gear set on the torsion strain cylinder, and calculates the output torque output by the planetary gear set to the clutch power output assembly based on the strain gauge; The torque detection module further includes a processing unit, which is electrically connected to the torque sensing component and is used to process the torque value of the output torque, the rotation circle value of the output torque, and the action time value of the output torque.

2. The torque detection module of the clutch-type power transmission device according to claim 1 further comprises a display interface, wherein the display interface is electrically connected to the torque sensing component to display the torque value of the output torque. 3 . The torque detection module of the clutch-type power transmission device according to claim 1 , further comprising a warning unit, wherein the warning unit is electrically connected to the processing unit and is used to generate a warning message when the output torque triggers a warning condition.

4. The torque detection module of the clutch-type power transmission device according to claim 1 further comprises a storage unit, which is electrically connected to the processing unit and is used to store all the torque values ​​of the above-mentioned output torques, all the rotation circle values ​​of the above-mentioned output torques and all the action time values ​​of the above-mentioned output torques.

5. The torque detection module of the clutch-type power transmission device according to claim 1 further comprises a communication unit, wherein the communication unit is electrically connected to the processing unit for communicating and transmitting at least one of the torque value of the output torque, the rotation circle value of the output torque and the action time value of the output torque.

6. The torque detection module of the clutch type power transmission device according to claim 1, wherein: The torsion strain tube comprises: an upper cylindrical seat, adjacent to the power source input shaft; a lower cylindrical seat adjacent to the clutched power output assembly; and 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 multiple setting surfaces are used to set the at least one strain gauge.

7. The torque detection module of the clutch type power transmission device according to claim 6, wherein: The extending portion is provided with a groove on each of the plurality of opening surfaces, and the groove extends to the upper cylindrical seat and the lower cylindrical seat.

8. The torque detection module of the clutch type power transmission device according to claim 6, wherein: The extension portion is provided with a through hole on each of the plurality of opening surfaces, and the through hole passes through the extension portion.

9. The torque detection module of the clutch type power transmission device according to claim 6, wherein: The plurality of setting surfaces are parallel to each other, and the plurality of opening surfaces are parallel to each other.

10. A clutch-type power transmission device, comprising: A power source having a power source input shaft; Clutch type power take-off assembly; The torque detection module is disposed between the power source and the clutch power output assembly and comprises: 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 axially connecting the power source input shaft and the clutch-type power output assembly; and Torque sensing assembly, comprising: The torsion strain cylinder is sleeved on the power transmission shaft and fixed to the fixed outer cylinder and the planetary gear set respectively, and comprises: an upper cylindrical seat, adjacent to the power source input shaft; a lower cylindrical seat adjacent to the clutched power output assembly; and The extended cylindrical portion is in a hollow cylindrical shape and connects the upper cylindrical seat and the lower cylindrical seat along the axial direction, and has a circumferential wall for arranging at least one strain gauge; and The at least one strain gauge is disposed on the torsion strain cylinder perpendicular to the axial direction; in, When the clutch mechanism of the clutch power output assembly is in a just-released state, the at least one strain gauge senses at least one shear strain at 45 degrees to the axial direction caused by the planetary gear set on the torsion strain cylinder, and calculates the output torque output by the planetary gear set to the clutch power output assembly based on the strain gauge; The torque detection module further includes a processing unit, which is electrically connected to the torque sensing component and is used to process the torque value of the output torque, the rotation circle value of the output torque, and the action time value of the output torque.

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