Stress detection device and tool holder

Abstract

The utility model relates to a stress detection device and a knife handle, which comprise a main body, two stress sensing modules and a packaging material, an outer ring surface of the main body is recessed to form an annular accommodating groove; the two stress sensing modules are arranged in the annular accommodating groove of the main body and are spaced along the central axis; each stress sensing module comprises a plurality of stress sensing units, each stress sensing unit comprises two strain sensing elements, and the two strain sensing elements of each stress sensing unit are symmetrically arranged by taking the central axis as the center; each strain sensing element of one stress sensing module and each strain sensing element of the other stress sensing module are correspondingly arranged in the axial direction of the main body; the packaging material is arranged in the annular accommodating groove of the main body and wraps the two stress sensing modules.

Description

Technical Field

[0001] The utility model relates to a tool handle, and particularly to a tool handle with a force detection device. Background Art

[0002] It is known that the tool handle plays an important role in the production process of precision parts. The tool handle is used to connect the spindle of a processing machine and a tool, so that the rotational power of the spindle can be transmitted to the tool through the tool handle to perform the cutting process. When the tool cuts an object, due to the vibration generated by the operation of the processing machine and the uneven surface of the object contacted by the tool, real-time stress changes are generated on the tool and the tool handle, which easily affects the accuracy of the tool handle driving the tool to perform cutting, and even reduces the service life of the tool handle and the tool.

[0003] In addition, when the types of objects to be cut are different, corresponding tools need to be replaced for cutting. At this time, the force on the tool handle will also change. Or, there may be quality differences in the same specification of tools, resulting in uneven force on the tool handle, which will also affect the cutting accuracy and service life of the tool handle. Coupled with the fact that the above situations are difficult for on-site operators to judge in real time, therefore, how to provide real-time monitoring information corresponding to the force situation is a technical issue currently focused on by the related industries. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to provide a force detection device and a tool handle, which can sense the force situation in real time and generate corresponding sensing signals.

[0005] To achieve the above purpose, a force detection device provided by the utility model is defined with a central axis; the force detection device includes a main body, two force sensing modules and a packaging material. The main body is cylindrical; an annular accommodation groove is recessed on an outer ring surface of the main body; the two force sensing modules are arranged in the annular accommodation groove of the main body and are spaced along the central axis; each of the force sensing modules includes a plurality of force sensing units, and each of the force sensing units includes two strain sensing elements. The two strain sensing elements of each of the force sensing units are symmetrically arranged with the central axis as the center; each of the strain sensing elements of one of the force sensing modules is axially corresponding to each of the strain sensing elements of the other force sensing module on the main body; the packaging material is arranged in the annular accommodation groove of the main body and covers the two force sensing modules.

[0006] Among them, it includes an inner cylinder and a circuit board assembly. The main body has a hollow part, the inner cylinder is arranged in the hollow part of the main body, and the inner cylinder has an accommodating space; the circuit board assembly is arranged in the accommodating space, and the circuit board assembly includes a control module and a wireless transmission module. The control module is electrically connected to the two force sensing modules and the wireless transmission module. The control module receives at least one sensing signal of each of the force sensing modules and sends at least one sensing signal of each of the force sensing modules through the wireless transmission module.

[0007] Among them, the circuit board assembly includes a first circuit board and a second circuit board. The first circuit board is electrically connected to the second circuit board. The control module and the wireless transmission module are arranged on the first circuit board. A power control module is arranged on the second circuit board. The power control module is used to connect to a battery module to supply power to the control module and the wireless transmission module.

[0008] Among them, the accommodating space has a first accommodating chamber, a second accommodating chamber and a third accommodating chamber. The first accommodating chamber and the third accommodating chamber are respectively located on opposite sides of the second accommodating chamber and communicate with the second accommodating chamber. The circuit board assembly is arranged in the second accommodating chamber. The battery module includes two batteries, and the two batteries are respectively arranged in the first accommodating chamber and the third accommodating chamber.

[0009] Among them, the main body has a first light-transmitting hole, the inner cylinder has a second light-transmitting hole, the circuit board assembly includes a light-emitting element, the first light-transmitting hole and the second light-transmitting hole correspond to the light-emitting element, and the light emitted by the light-emitting element passes through the first light-transmitting hole and the second light-transmitting hole.

[0010] Among them, it includes a plurality of counterweight blocks. One end of the main body has a plurality of jacks, and each counterweight block is embedded in each jack.

[0011] Among them, the multiple force sensing units of each force sensing module include a first force sensing unit and a second force sensing unit. The first force sensing unit is used to sense the force in the direction along a first axis, and the first axis is perpendicular to the central axis. The two strain sensing elements of the first force sensing unit are two first strain sensing elements, and the two first strain sensing elements are symmetrically arranged along the first axis; the second force sensing unit is used to sense the force in the direction along a second axis, and the second axis is perpendicular to the central axis and the first axis. The two strain sensing elements of the second force sensing unit are two second strain sensing elements, and the two second strain sensing elements are symmetrically arranged along the second axis.

[0012] Among them, each of the first strain sensing elements includes two first strain sensing structures. The first strain sensing structures of the two first strain sensing elements of each of the first force sensing units are electrically connected to form a first Wheatstone bridge. Each of the first Wheatstone bridges has a first arm and a second arm. The two first strain sensing structures of one of the first strain sensing elements of each of the force sensing modules are respectively located on an upper arm of the first arm of each of the first Wheatstone bridges and a lower arm of the second arm of each of the first Wheatstone bridges; the two first strain sensing structures of the other first strain sensing element of each of the force sensing modules are respectively located on a lower arm of the first arm of each of the first Wheatstone bridges and an upper arm of the second arm of each of the first Wheatstone bridges.

[0013] Among them, each of the second strain sensing elements includes two second strain sensing structures. The second strain sensing structures of the two second strain sensing elements of each of the force sensing modules are electrically connected so that the two second force sensing units respectively form Wheatstone bridges.

[0014] Among them, the multiple force sensing units of each of the force sensing modules include a tension sensing unit. The two strain sensing elements of the tension sensing unit are two tension sensing elements. The two tension sensing elements are symmetrically arranged in the annular accommodating groove of the main body with the central axis as the center.

[0015] Among them, the multiple force sensing units of each of the force sensing modules include a torque sensing unit. The two strain sensing elements of the torque sensing unit are two torque sensing elements. The two torque sensing elements are symmetrically arranged in the annular accommodating groove of the main body with the central axis as the center.

[0016] Among them, an antenna is included and is arranged in the annular accommodating groove. The antenna is electrically connected to the wireless transmission module; the encapsulating material covers the antenna.

[0017] Among them, the main body has at least one first coupling hole, and the inner cylinder has at least one second coupling hole. The position of the at least one second coupling hole corresponds to the position of the at least one first coupling hole.

[0018] The present utility model further provides a tool handle for connecting a machining spindle and a tool; the tool handle includes the force detection device, a tool head, and a chuck. The tool head is used to connect the machining spindle, and the tool head is connected to one end of the main body; the chuck is used to connect the tool, and the chuck is connected to the other end of the main body.

[0019] The effect of the present utility model is that the force detection device and the knife handle are provided with two force sensing modules on the main body, so that real-time force changes can be sensed by the two force sensing modules, in order to obtain real-time force changes at different positions on the main body, and to determine whether the force detection device is tilted or shaken, so as to achieve the purpose of effectively monitoring and analyzing the real-time working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. is a perspective view of the knife handle of a preferred embodiment of the present utility model.

[0021] Figure 2 FIG. is a schematic diagram of some components of the above preferred embodiment.

[0022] Figure 3 is Figure 2 an exploded view of some components shown in FIG.

[0023] Figure 4 FIG. is a perspective view of some components of the above preferred embodiment from another perspective.

[0024] Figure 5 is Figure 4 a cross-sectional view taken along the line 5-5 of FIG.

[0025] Figure 6 FIG. is a schematic diagram of the inner cylinder and the circuit board assembly of the above preferred embodiment.

[0026] Figure 7 is Figure 2 a cross-sectional view taken along the line 7-7 of FIG.

[0027] Figure 8 FIG. is a schematic diagram of some components of the above preferred embodiment, showing the configuration of the force sensing module.

[0028] Figure 9 FIG. is a schematic diagram of the first force sensing unit of the above preferred embodiment.

[0029] Figure 10 FIG. is a circuit diagram of the first force sensing unit of the above preferred embodiment.

[0030] Figure 11 FIG. is a schematic diagram of the second force sensing unit of the above preferred embodiment.

[0031] Figure 12 FIG. is a circuit diagram of the second force sensing unit of the above preferred embodiment.

[0032] Figure 13 FIG. is a schematic diagram of the tension sensing unit of the above preferred embodiment.

[0033] Figure 14Circuit diagram of the tensile force sensing unit for the above preferred embodiment.

[0034] Figure 15 Schematic diagram of the torque sensing unit for the above preferred embodiment.

[0035] Figure 16 Circuit diagram of the torque sensing unit for the above preferred embodiment.

[0036] Figure 17 Schematic diagram of the first circuit board for the above preferred embodiment.

[0037] Figure 18 Schematic diagram of the second circuit board for the above preferred embodiment.

[0038] Description of reference numerals:

[0039] 100: Force detection device

[0040] 10: Main body

[0041] 11: Hollow part

[0042] 11a: First opening

[0043] 11b: Second opening

[0044] 12: Outer ring surface

[0045] 12a: Annular accommodating groove

[0046] 12b: Wire threading groove

[0047] 13: Jack

[0048] 14: First coupling hole

[0049] 15: First light-transmitting hole

[0050] 16: First wire threading hole

[0051] 20: Counterweight

[0052] 30: Force sensing module

[0053] 32: First force sensing unit

[0054] 321: First strain sensing element

[0055] 321a: First flexible substrate

[0056] R1, R2, R3, R4: First strain sensing structure

[0057] 34: Second force sensing unit

[0058] 341: Second strain sensing element

[0059] 341a: Second flexible substrate

[0060] R5, R6, R7, R8: Second strain sensing structure

[0061] 36: Tensile force sensing unit

[0062] 361: Tensile force sensing element

[0063] 361a: Third flexible substrate

[0064] R9, R10, R11, R12: Tensile force sensing structure

[0065] 38: Torque sensing unit

[0066] 381: Torque sensing element

[0067] 381a: Fourth flexible substrate

[0068] R13, R14, R15, R16: Torque sensing structure

[0069] 40: Inner cylinder

[0070] 40a: End cap

[0071] 40a1: Third through hole

[0072] 41: Accommodating space

[0073] 411: First chamber

[0074] 412: Second chamber

[0075] 413: Third chamber

[0076] 41a: Third opening

[0077] 41b: Fourth opening

[0078] 42: Second wire threading hole

[0079] 43: Second coupling hole

[0080] 44: Second light transmissive hole

[0081] 50: Circuit board assembly

[0082] 51: First circuit board

[0083] 511: First connector

[0084] 52: Second circuit board

[0085] 521: Second connector

[0086] 53: Power control module

[0087] 54: Light-emitting element

[0088] 55: Wireless transmission module

[0089] 56: Vibration sensing module

[0090] 57: Control module

[0091] 571: Analog / digital signal converter

[0092] 572: Controller

[0093] 60: Battery module

[0094] 61: Battery

[0095] 70: Antenna

[0096] 80: Encapsulation material

[0097] 90: Diversion pipe

[0098] 200: Tool bit head

[0099] 200a: First through hole

[0100] 300: Chuck

[0101] 300a: Second through hole

[0102] 1: Tool handle

[0103] 2: Tool

[0104] A: Central axis

[0105] L1: First axis

[0106] L2: Second axis

[0107] V S1 : First sensing signal

[0108] V S2 : Second sensing signal

[0109] V S3 : Third sensing signal

[0110] V S4 : Fourth sensing signal

[0111] V i : Input voltage Detailed implementation manners

[0112] To more clearly illustrate the present utility model, preferred embodiments are given below and described in detail in conjunction with the accompanying drawings. Please refer to Figures 1 to 5Shown is a tool shank 1 according to a preferred embodiment of the present utility model. The tool shank 1 includes a tool head 200, a chuck 300, and a force detection device 100. The tool head 200 has a first through hole 200a communicating with two ends of the tool head 200. The tool head 200 is used to connect a machining spindle (not shown in the figure), and the tool head 200 is connected to one end of the force detection device 100. The chuck 300 has a second through hole 300a communicating with two ends of the chuck 300. The chuck 300 is used to connect a tool 2, and the chuck 300 is connected to the other end of the force detection device 100. In this embodiment, the tool shank 1 is taken as a rotating tool shank.

[0113] The force detection device 100 defines a central axis A. The force detection device 100 includes a main body 10, a plurality of counterweight blocks 20, two force sensing modules 30, an inner cylinder 40, a circuit board assembly 50, and a packaging material 80.

[0114] One end of the main body 10 is connected to the tool head 200 along the central axis A, and the other end of the main body 10 is connected to the chuck 300 along the central axis A. The main body 10 is cylindrical and has a hollow portion 11. The hollow portion 11 communicates with two ends of the main body 10 along the central axis A and respectively forms a first opening 11a and a second opening 11b. The first opening 11a communicates with the first through hole 200a of the tool head 200, and the second opening 11b communicates with the second through hole 300a of the chuck 300. An annular accommodation groove 12a and a plurality of wire grooves 12b are recessed on an outer ring surface 12 of the main body 10. The plurality of wire grooves 12b communicate with the annular accommodation groove 12a. The main body 10 has a plurality of first wire holes 16, a plurality of jacks 13, at least one first coupling hole 14, and a first light transmission hole 15. Each of the first wire holes 16 is disposed in each of the wire grooves 12b and communicates with the hollow portion 11. The plurality of jacks 13 are located around the second opening 11b for the plurality of counterweight blocks 20 to be correspondingly embedded; the at least one first coupling hole 14 communicates with the hollow portion 11 and is used to couple the inner cylinder 40; the first light transmission hole 15 communicates with the hollow portion 11 and is used to couple a light guide column (not shown in the figure) for light to pass through. In this embodiment, the material of the main body 10 is metal; the number of the plurality of jacks 13 corresponds to the number of the plurality of counterweight blocks 20, and the number of the plurality of jacks 13 and the number of the plurality of counterweight blocks 20 can be set according to requirements to achieve the effect of dynamic balance counterweight.

[0115] As Figures 8 to 16As shown, the two force sensing modules 30 are disposed in the annular accommodating groove 12a of the main body 10 and are spaced along the central axis A. Each of the force sensing modules 30 is configured to sense the force applied to the knife handle 1 to output at least one sensing signal. In this embodiment, the at least one sensing signal is multiple and includes a first sensing signal V S1 , a second sensing signal V S2 , a third sensing signal V S3 , and a fourth sensing signal V S4 .

[0116] The structures of the two force sensing modules 30 are the same. Here, one force sensing module 30 will be described. The force sensing module 30 includes a plurality of force sensing units. Each of the force sensing units includes two strain sensing elements. Each of the strain sensing elements of one of the force sensing modules 30 and each of the strain sensing elements of the other force sensing module 30 are correspondingly disposed in the annular accommodating groove 12a in the axial direction of the main body 10. In this embodiment, each of the strain sensing elements includes a flexible substrate and a strain sensing structure disposed on the flexible substrate. As Figure 3 and Figure 4 shown, the plurality of strain sensing elements are disposed in the annular accommodating groove 12a, and each of the strain sensing elements is adhered to the groove surface of the annular accommodating groove 12a. The plurality of strain sensing elements are connected through a flexible circuit board (Flexure circuit board, FPC) and a plurality of wires (not shown in the figure), and the plurality of wires pass through the plurality of first wire passing holes 16 to transmit the plurality of sensing signals. The plurality of force sensing units of the force sensing module 30 include a first force sensing unit 32, a second force sensing unit 34, a tension sensing unit 36, and a torsion sensing unit 38.

[0117] The first force sensing unit 32 is configured to sense the force applied to the knife handle 1 in the direction of a first axis L1 to output the corresponding first sensing signal V S1, the first axis L1 is perpendicular to the central axis A. The two strain sensing elements of the first force sensing unit 32 are two first strain sensing elements 321. The two first strain sensing elements 321 of the first force sensing unit 32 are symmetrically arranged along the first axis L1. Each of the first strain sensing elements 321 of one of the force sensing modules 30 and each of the first strain sensing elements 321 of the other force sensing module 30 are aligned axially with respect to the main body 10 and are not staggered. Each of the first strain sensing elements 321 includes a first flexible substrate 321a and two first strain sensing structures R1-R4 provided on the first flexible substrate 321a. Each of the first strain sensing structures R1-R4 has a resistance value, so that the first force sensing unit 32 can be connected into a structure of a Wheatstone bridge as shown in Figure 10 (i.e., the first Wheatstone bridge) through the circuit of the flexible circuit board. The first Wheatstone bridge has a first arm and a second arm. The two first strain sensing structures R3 and R4 of one of the first strain sensing elements 321 are respectively located on an upper arm of the first arm and a lower arm of the second arm; the two first strain sensing structures R1 and R2 of the other first strain sensing element 321 are respectively located on a lower arm of the first arm and an upper arm of the second arm. When the knife handle 1 is subjected to stress along the first axis L1, the resistance values of the first strain sensing structures R1-R4 change correspondingly. Among them, when one side of the knife handle 1 along the first axis L1 is compressed and the other side is relatively stretched, the resistance value of one of the first strain sensing elements 321 of each of the first force sensing units 32 on the compressed side is less than the resistance value of the other first strain sensing element 321, so as to generate the corresponding first sensing signal V S1 . When the knife handle 1 is subjected to greater stress along the first axis L1, the absolute value of the first sensing signal V S1 is greater. Since it is the relative change of the resistance values on the two first strain sensing elements 321 (that is, the resistance values of the two first strain sensing structures R1, R2 or R3, R4 on one first strain sensing element 321 increase, and the resistance values of the two first strain sensing structures R3, R4 or R1, R2 on the other first strain sensing element 321 decrease), the structure of the Wheatstone bridge can be used to increase the first sensing signal V S1 , that is, effectively increase the sensitivity of the first sensing signal V S1 .

[0118] The second force sensing unit 34 is used to sense the force on the knife handle 1 in the direction of a second axis L2 and output the corresponding second sensing signal V S2, the second axis L2 is perpendicular to the central axis A and the first axis L1. The two strain sensing elements of the second force sensing unit 34 are two second strain sensing elements 341. The two second strain sensing elements 341 are symmetrically arranged along the second axis L2. Each of the second strain sensing elements 341 of one of the force sensing modules 30 and each of the second strain sensing elements 341 of the other force sensing module 30 are aligned axially with respect to the main body 10 and are not staggered. Each of the second strain sensing elements 341 includes a second flexible substrate 341a and two second strain sensing structures R5-R8 provided on the second flexible substrate 341a. Each of the second strain sensing structures R5-R8 has a resistance value, so that the second force sensing unit 34 can be connected into the structure of a Wheatstone bridge as shown in Figure 12 (i.e., the second Wheatstone bridge) through the circuit of the flexible circuit board. The second Wheatstone bridge has a first arm and a second arm. The two second strain sensing structures R7 and R8 of one of the second strain sensing elements 341 are respectively located on an upper arm of the first arm of the second Wheatstone bridge and a lower arm of the second arm of the second Wheatstone bridge; the two second strain sensing structures R5 and R6 of the other second strain sensing element 341 are respectively located on a lower arm of the first arm of the second Wheatstone bridge and an upper arm of the second arm of the second Wheatstone bridge. When the knife handle 1 is subjected to a stress along the second axis L2, the resistance values of the second strain sensing structures R5-R8 change correspondingly. Among them, when one side of the knife handle 1 along the second axis L2 is compressed and the other side is relatively stretched, the resistance value of one of the second strain sensing elements 341 on the compressed side is less than the resistance value of the other second strain sensing element 341, so as to generate the corresponding second sensing signal V S2 . In addition, when the stress applied to the knife handle 1 along the second axis L2 is greater, the absolute value of the second sensing signal V S2 is greater. Since it is the relative change in the resistance values on the two second strain sensing elements 341 (that is, the resistance values of the two second strain sensing structures R5, R6 or R7, R8 on one second strain sensing element 341 increase, and the resistance values of the two second strain sensing structures R7, R8 or R5, R6 on the other second strain sensing element 341 decrease), the structure of the Wheatstone bridge can be used to increase the second sensing signal V S2 , that is, effectively increase the sensitivity of the second sensing signal V S2 .

[0119] The tensile force sensing unit 36 is used to sense the tensile force in the direction of the central axis A of the knife handle 1 to output the corresponding third sensing signal V S3, the two strain sensing elements of the tensile force sensing unit 36 are two tensile force sensing elements 361. The two tensile force sensing elements 361 are symmetrically arranged about the central axis A. Each of the tensile force sensing elements 361 of one of the force sensing modules 30 and each of the tensile force sensing elements 361 of the other force sensing module 30 are aligned axially of the main body 10 and are not staggered. Each of the tensile force sensing elements 361 is located between each of the first strain sensing elements 321 and each of the second strain sensing elements 341. Each of the tensile force sensing elements 361 includes a third flexible substrate 361a and two tensile force sensing structures R9 to R12 provided on the third flexible substrate 361a. Each of the tensile force sensing structures R9 to R12 has a resistance value, so that the tensile force sensing unit 36 can be connected through the circuit of the flexible circuit board to form a structure of a Wheatstone bridge as shown in Figure 14 (i.e., the third Wheatstone bridge). Two tensile force sensing structures R11 and R12 of one of the tensile force sensing elements 361 are located on the upper arms of the first arm and the second arm of the third Wheatstone bridge, and two tensile force sensing structures R9 and R10 of the other tensile force sensing element 361 are located on the lower arms of the first arm and the second arm of the third Wheatstone bridge. The resistance value of each of the tensile force sensing elements 361 changes corresponding to the tensile force applied to the handle 1 along the central axis A, so as to generate a corresponding third sensing signal V S3 . When the handle 1 is subjected to a greater tensile force along the central axis A, the absolute value of the third sensing signal V S3 is greater.

[0120] The torque sensing unit 38 is used to sense the torque applied to the handle 1 and output a corresponding fourth sensing signal V S4 . The two strain sensing elements of the torque sensing unit 38 are two torque sensing elements 381. The two torque sensing elements 381 are symmetrically arranged about the central axis A. Each of the torque sensing elements 381 of one of the force sensing modules 30 and each of the torque sensing elements 381 of the other force sensing module 30 are aligned axially of the main body 10 and are not staggered. Each of the torque sensing elements 381 is located between each of the first strain sensing elements 321 and each of the second strain sensing elements 341. Each of the torque sensing elements 381 includes a fourth flexible substrate 381a and two torque sensing structures R13 to R16 provided on the fourth flexible substrate 381a. Each of the torque sensing structures R13 to R16 has a resistance value, so that the torque sensing unit 38 can be connected through the circuit of the flexible circuit board to form a structure as shown in Figure 16The structure of the Wheatstone bridge (i.e., the fourth Wheatstone bridge) shown in FIG. 1 is a structure in which two torque sensing structures R15 and R16 of one torque sensing element 381 are located at the upper arms of the first arm and the second arm of the fourth Wheatstone bridge, and two torque sensing structures R13 and R14 of another torque sensing element 381 are located at the lower arms of the first arm and the second arm of the fourth Wheatstone bridge. The resistance value of each torque sensing element 381 changes according to the torque force applied to the handle 1 to generate the corresponding fourth sensing signal V S4 When the torque on the handle 1 is greater, the fourth sensing signal V S4 The larger the absolute value of .

[0121] Since the strain sensing elements of one force sensing module 30 and the strain sensing elements of the other force sensing module 30 are arranged in correspondence with each other in the axial direction of the main body 10 rather than being staggered, when the force detection device 100 is not in a state of deflection, tilt or shaking, the values ​​of the sensing signals correspondingly generated by the two force sensing modules 30 are the same or similar; when the force detection device 100 is in a state of deflection, tilt or shaking, the values ​​of the sensing signals correspondingly generated by the two force sensing modules 30 will be significantly different. Therefore, it is possible to determine whether the force detection device 100 is deflected, tilted or shaken by the values ​​of the two sensing signals. In other embodiments, the multiple force sensing units of each of the force sensing modules 30 can be additionally arranged as needed to correspond to the forces in different directions of the handle 1 and thereby obtain the corresponding sensing signals.

[0122] like Figures 3 to 7As shown, the inner cylinder 40 is disposed in the hollow portion 11 of the main body 10. The inner cylinder 40 has an accommodation space 41 communicating with two ends of the inner cylinder 40 to form a third opening 41a and a fourth opening 41b. One end of the inner cylinder 40 having the third opening 41a is combined with an end cap 40a. The end cap 40a covers the third opening 41a. The end cap 40a has a third through hole 40a1 to communicate the accommodation space 41, communicate the first opening 11a and the first through hole 200a of the cutter head 200. The fourth opening 41b communicates the second opening 11b and the second through hole 300a of the chuck 300. The accommodation space 41 has a first accommodation chamber 411, a second accommodation chamber 412 and a third accommodation chamber 413. The first accommodation chamber 411 and the third accommodation chamber 413 are respectively located on opposite sides of the second accommodation chamber 412 and communicate with the second accommodation chamber 412. The inner cylinder 40 has a plurality of second wire passing holes 42, at least one second coupling hole 43 and a second light transmission hole 44. The number and positions of the plurality of second wire passing holes 42 correspond to those of the plurality of first wire passing holes 16 for the plurality of wires to pass through. The position and number of the at least one second coupling hole 43 respectively correspond to the position and number of the at least one first coupling hole 14. The second light transmission hole 44 communicates with the accommodation space 41 and is combined with a light guide column (not shown in the figure) corresponding to the first light transmission hole 15. In this embodiment, the number of the at least one second coupling hole 43 and the at least one first coupling hole 14 is two each. Each of the second coupling holes 43 is a blind hole. Therefore, the main body 10 and the inner cylinder 40 are combined by locking the stop screws into the corresponding at least one first coupling hole 14 and the at least one second coupling hole 43 in sequence. In addition, the material of the inner cylinder 40 is plastic.

[0123] As Figure 6 , Figure 7 , Figure 17 and Figure 18As shown, the circuit board assembly 50 is disposed in the second chamber 412 of the accommodating space 41. The circuit board assembly 50 includes a first circuit board 51, a second circuit board 52, a power control module 53, a light-emitting element 54, a vibration sensing module 56, a control module 57, and a wireless transmission module 55. The first circuit board 51 includes a first connector 511 for electrically connecting to the second circuit board 52. The first circuit board 51 is provided with the control module 57, the wireless transmission module 55, and the vibration sensing module 56. The first connector 511 is electrically connected to the control module 57, the wireless transmission module 55, and the two force sensing modules 30. The second circuit board 52 includes a second connector 521 for connecting to the first connector 511. The second circuit board 52 is provided with the power control module 53 and the light-emitting element 54 facing the first circuit board 51. The power control module 53 is used to connect to a battery module 60 and is electrically connected to the second connector 521 and the light-emitting element 54 to supply power to the control module 57, the wireless transmission module 55, the vibration sensing module 56, the two force sensing modules 30, and the light-emitting element 54. Therefore, each of the force sensing modules 30 can receive an input voltage V i from the power control module 53, and convert the input voltage V i into the first sensing signal V S1 , the second sensing signal V S2 , the third sensing signal V S3 , and the fourth sensing signal V S4 . The battery module 60 includes two batteries 61, and the two batteries 61 are respectively disposed in the first chamber 411 and the third chamber 413. The positions of the first light-transmitting hole 15 and the second light-transmitting hole 44 correspond to the position of the light-emitting element 54. The light emitted by the light-emitting element 54 passes through the light guide column and exits from the first light-transmitting hole 15 and the second light-transmitting hole 44.

[0124] The control module 57 includes an analog / digital signal converter 571 and a controller 572. The controller 572 can be, for example, a microcontroller. The controller 572 is electrically connected to the analog / digital signal converter 571 and the vibration sensing module 56. The analog / digital signal converter 571 is electrically connected to the two first strain sensing elements 321, the two second strain sensing elements 341, the two tension sensing elements 361, and the two torque sensing elements 381 of each of the force sensing modules 30 through the flexible circuit board and the plurality of wires. The controller 572 obtains the first sensing signal V S1 of each of the force sensing modules 30 through the analog / digital signal converter 571, the second sensing signal VS2 , the third sensing signal V S3 and the fourth sensing signal V S4 , and according to the first sensing signal V S1 , the second sensing signal V S2 , the third sensing signal V S3 and the fourth sensing signal V S4 The light emitting element 54 is controlled by the power supply control module 53 so that the light emitting element 54 can emit light to achieve the effect of alerting the operator.

[0125] The wireless transmission module 55 is electrically connected to the controller 572. The force detection device 100 further includes an antenna 70. The antenna 70 is disposed in the annular groove 12a and electrically connected to the wireless transmission module 55. The antenna 70 is made of a printed flexible circuit board. Therefore, the controller 572 transmits the first sensing signal V of each force sensing module 30 through the wireless transmission module 55 and the antenna 70. S1 , the second sensing signal V S2 , the third sensing signal V S3 and the fourth sensing signal V S4 The first sensing signal V is transmitted to the external electronic device, so the operator can receive the first sensing signal V in real time through the external electronic device. S1 , the second sensing signal V S2 , the third sensing signal V S3 and the fourth sensing signal V S4 In addition to being able to obtain the timely force changes at different positions of the main body 10 based on the sensing signals of each of the force sensing modules 30, it is also possible to determine whether the force detection device 100 is in a state of deflection, tilt or shaking based on the difference between the sensing signals of one of the force sensing modules 30 and the sensing signals of another force sensing module 30, so as to achieve the purpose of effectively monitoring and analyzing the working conditions of the cutting execution.

[0126] Please visit again Figure 1 and Figure 4 The packaging material 80 is disposed in the annular receiving groove 12a and the plurality of threading grooves 12b of the main body 10, and the packaging material 80 covers the two force sensing modules 30 and the antenna 70, and the packaging material 80 is epoxy resin.

[0127] Please visit again Figure 5 and Figure 7The force detection device 100 further includes a guide tube 90, which is extended along the central axis A and is arranged in the accommodating space 41 of the inner tube 40, wherein one end of the guide tube 90 passes through the third through hole 40a1 and the first opening 11a to extend to the first through hole 200a of the tool handle head 200, and the other end of the guide tube 90 passes through the fourth opening 41b to extend to the second through hole 300a of the chuck 300, and the guide tube 90 is located between the first circuit board 51 and the second circuit board 52. Therefore, the cutting fluid can flow to the tool 2 through the first through hole 200a, the guide tube 90 and the second through hole 300a to avoid direct contact with the first circuit board 51 and the second circuit board 52.

[0128] In summary, the force detection device 100 and the knife handle 1 of the present invention can convert the real-time force change into the corresponding first sensing signal V according to the force along the first axis L1, the force along the second axis L2, the tension along the central axis A and the torque applied to the knife handle 1 through the two force sensing modules 30 disposed on the main body 10. S1 , the second sensing signal V S2 , the third sensing signal V S3 and the fourth sensing signal V S4 , and then cooperate with the circuit board assembly 50 disposed in the inner tube 40, the control module 57 receives the first sensing signal V S1 , the second sensing signal V S2 , the third sensing signal V S3 and the fourth sensing signal V S4 The sensing signals of the two force sensing modules 30 are sent through the wireless transmission module 55, so that the operator can receive the multiple sensing signals in real time through an external electronic device. In addition to being able to know the real-time force changes at different positions on the main body 10 according to the sensing signals of each of the force sensing modules 30, it is also possible to judge whether the force detection device 100 is in a state of deflection, tilt or shaking according to the difference between the sensing signals of one of the force sensing modules 30 and the sensing signals of another force sensing module 30, so as to achieve the purpose of effectively monitoring and analyzing the real-time working conditions of the handle 1 in performing cutting.

[0129] The plastic inner tube 40 can also provide a buffering effect to protect the circuit board assembly 50 and the battery 61, and prevent the circuit board assembly 50 and the battery 61 from directly contacting the rigid main body 10, which is susceptible to vibration and reduces the life span.

[0130] The above are only the preferred and feasible embodiments of the present utility model. Any equivalent changes made by applying the description and claims of the present utility model should be included within the scope of the patent of the present utility model.

Claims

1. A force detection device, wherein a central axis is defined; characterized in that: The force detection device comprises: A main body, which is cylindrical; an outer annular surface of the main body is concavely formed with an annular receiving groove; Two force sensing modules are arranged in the annular receiving groove of the main body and are spaced apart along the central axis; each of the force sensing modules comprises a plurality of force sensing units, each of the force sensing units comprises two strain sensing elements, and the two strain sensing elements of each of the force sensing units are symmetrically arranged with the central axis as the center; wherein each of the strain sensing elements of one of the force sensing modules and each of the strain sensing elements of the other of the force sensing modules are arranged correspondingly in the axial direction of the main body; A packaging material is disposed in the annular groove of the main body and covers the two force sensing modules.

2. The force detection device according to claim 1, characterized in that: It comprises an inner tube and a circuit board assembly, the main body has a hollow part, the inner tube is arranged in the hollow part of the main body, and the inner tube has a accommodating space; the circuit board assembly is arranged in the accommodating space, the circuit board assembly includes a control module and a wireless transmission module, the control module is electrically connected to the two force sensing modules and the wireless transmission module, the control module receives at least one sensing signal of each of the force sensing modules and sends at least one sensing signal of each of the force sensing modules through the wireless transmission module.

3. The force detection device according to claim 2, characterized in that: The circuit board assembly includes a first circuit board and a second circuit board, the first circuit board is electrically connected to the second circuit board, the first circuit board is provided with the control module and the wireless transmission module, the second circuit board is provided with a power control module, and the power control module is used to connect a battery module to supply power to the control module and the wireless transmission module.

4. The force detection device according to claim 3, characterized in that: The accommodating space has a first accommodating chamber, a second accommodating chamber and a third accommodating chamber, the first accommodating chamber and the third accommodating chamber are respectively located on opposite sides of the second accommodating chamber and are connected to the second accommodating chamber, the circuit board assembly is arranged in the second accommodating chamber, and the battery module includes two batteries, and the two batteries are respectively arranged in the first accommodating chamber and the third accommodating chamber.

5. The force detection device according to claim 2, characterized in that: The main body has a first light-transmitting hole, the inner tube has a second light-transmitting hole, the circuit board assembly includes a light-emitting element, the first light-transmitting hole and the second light-transmitting hole correspond to the light-emitting element, and the light emitted by the light-emitting element is transmitted through the first light-transmitting hole and the second light-transmitting hole.

6. The force detection device according to claim 1, characterized in that: It comprises a plurality of counterweight blocks, one end of the main body is provided with a plurality of insertion holes, and each of the counterweight blocks is embedded in each of the insertion holes.

7. The force detection device according to claim 1, characterized in that: The multiple force sensing units of each of the force sensing modules include a first force sensing unit and a second force sensing unit, the first force sensing unit is used to sense force in a direction along a first axis, the first axis is perpendicular to the central axis, the two strain sensing elements of the first force sensing unit are two first strain sensing elements, and the two first strain sensing elements are symmetrically arranged along the first axis; the second force sensing unit is used to sense force in a direction along a second axis, the second axis is perpendicular to the central axis and the first axis, the two strain sensing elements of the second force sensing unit are two second strain sensing elements, and the two second strain sensing elements are symmetrically arranged along the second axis.

8. The force detection device according to claim 7, characterized in that: Each of the first strain sensing elements comprises two first strain sensing structures, the first strain sensing structures of the two first strain sensing elements of each of the first force sensing units are electrically connected to form a first Wheatstone bridge, wherein each of the first Wheatstone bridges has a first arm and a second arm, and the two first strain sensing structures of one of the first strain sensing elements of each of the force sensing modules are respectively located at an upper arm of the first arm of each of the first Wheatstone bridges and a lower arm of the second arm of each of the first Wheatstone bridges; The two first strain sensing structures of the other first strain sensing element of each of the force sensing modules are respectively located at a lower arm of the first arm of each of the first Wheatstone bridges and an upper arm of the second arm of each of the first Wheatstone bridges.

9. The force detection device according to claim 8, characterized in that: Each of the second strain sensing elements includes two second strain sensing structures. The second strain sensing structures of the two second strain sensing elements of each of the force sensing modules are electrically connected, so that the two second force sensing units respectively form a Wheatstone bridge.

10. The force detection device according to claim 1, characterized in that: The multiple force sensing units of each of the force sensing modules include a tension sensing unit, the two strain sensing elements of the tension sensing unit are two tension sensing elements, and the two tension sensing elements are symmetrically arranged in the annular groove of the main body with the central axis as the center.

11. The force detection device according to claim 1, characterized in that: The multiple force sensing units of each of the force sensing modules include a torque sensing unit, the two strain sensing elements of the torque sensing unit are two torque sensing elements, and the two torque sensing elements are symmetrically arranged in the annular mounting groove of the main body with the central axis as the center.

12. The force detection device according to claim 2, characterized in that: It comprises an antenna, which is arranged in the annular groove, and the antenna is electrically connected to the wireless transmission module; the packaging material covers the antenna.

13. The force detection device according to claim 2, characterized in that: The main body has at least one first combining hole, the inner cylinder has at least one second combining hole, and the position of the at least one second combining hole corresponds to the position of the at least one first combining hole.

14. A tool handle for connecting a machining spindle and a tool; characterized in that: The knife handle comprises: a force detection device as claimed in any one of claims 1 to 13; A tool handle head, used to connect the processing spindle, the tool handle head is connected to one end of the main body; A chuck is used to connect the tool, and the chuck is connected to the other end of the main body.

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