Wireless snap ring type strain torque sensor and knife handle comprising same

Abstract

The utility model provides a wireless snap ring type strain torque sensor and a cutter handle comprising the same, relates to the technical field of machine tools, and solves the technical problem that the original structure of a shaft to be tested needs to be cut off or transformed when a torque sensor tests torque. The torque sensor comprises a first elastomer end ring which is of an annular structure; the second elastomer end ring is of an arc-shaped structure; the two elastic body connecting columns are symmetrically arranged, and the two ends of each elastic body connecting column are connected with the first elastic body end ring and the second elastic body end ring respectively, so that a torque sensor with I-shaped front view projection is formed; the strain gauge groups are symmetrically mounted on the two elastomer connecting columns; the cutter handle comprises a cutter handle body and a wireless clamping ring type strain type torque sensor, and the wireless clamping ring type strain type torque sensor is arranged on the cutter handle body in a sleeving mode in an interference fit mode. The device is used for real-time monitoring of machining conditions of a machine tool, real-time monitoring of output torque of an electric spindle, fault diagnosis, tool wear monitoring and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of machine tools, in particular to a wireless clamping ring type strain type torque sensor and a tool handle comprising the same. Background Art

[0002] Torque is an important parameter of the power output of rotating machinery, and it is an important basis for judging whether the power of rotating machinery meets the standard. Therefore, torque measurement is an indispensable content for the development, quality inspection, optimization control, working condition monitoring and fault diagnosis of various mechanical products. However, the torque test environment often has problems such as self-rotation, narrow space, and large vibration interference. Traditional torque test methods cannot cope with them, and traditional torque sensors need to cut off or modify the original structure of the shaft to be tested, which is not allowed in the machine tool processing process, which brings a lot of difficulties to the testing work. The clamp ring type wireless torque sensor has the advantages of no need to destroy the structure to be tested, easy installation and maintenance, and a wide range of applications, which can cope with the above problems. Combining the clamp ring type wireless torque sensor with the tool holder, a tool holder that can wirelessly and real-timely test the cutting torque online is designed to realize real-time monitoring of the machining conditions of the machine tool, real-time monitoring of the output torque of the electric spindle, fault diagnosis and tool wear monitoring, etc., which is of great significance to the development and matching of the spindle and machine tool processing. Utility Model Content

[0003] The utility model aims to provide a wireless clamp-type strain-type torque sensor and a tool handle containing the same, so as to solve the technical problem in the prior art that the original structure of the shaft to be tested needs to be cut off or modified when testing torque with a torque sensor.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] In a first aspect, the utility model provides a wireless clamp-type strain-type torque sensor, comprising:

[0006] The first elastic end ring is a circular ring structure and is used to be passed through the outside of one end of the component to be measured;

[0007] The second elastic body end ring is an arc-shaped structure, arranged parallel to and spaced from the first elastic body end ring, and is used to be passed through the outer side of the other end of the component to be measured;

[0008] Two elastic connecting columns are symmetrically arranged, and two ends of the elastic connecting columns are respectively connected to the first elastic end ring and the second elastic end ring to form a torque sensor with an I-shaped front view projection;

[0009] The strain gauge group is symmetrically mounted on the two elastic body connecting columns.

[0010] The wireless clamp-ring strain-type torque sensor provided by the utility model has the advantages of no need to destroy the structure to be tested, easy installation and maintenance, wide application range, etc., and solves the problem that the original structure of the shaft to be tested needs to be cut off or modified when testing torque with a traditional torque sensor.

[0011] As a further improvement of the present invention, the elastomeric connecting column is connected to the inner ring edges of the first elastomeric end ring and the second elastomeric end ring.

[0012] As a further improvement of the present invention, the strain gauge group includes eight strain gauges, four of which form a group, and one group of strain gauges is arranged on each of the elastic body connecting columns.

[0013] As a further improvement of the present invention, each group of strain gauges is divided into two pairs, wherein one pair of strain gauges is relatively arranged at the top position of the elastic body connecting column, and the other pair of strain gauges is relatively arranged at the bottom position of the elastic body connecting column.

[0014] As a further improvement of the present invention, the two pairs of strain gauges are installed at the same position on the side of the elastic body connecting column.

[0015] As a further improvement of the present invention, a plurality of through-holes are symmetrically arranged on the end ring of the first elastic body.

[0016] As a further improvement of the present invention, a plurality of fixed installation holes are symmetrically arranged on the second elastic body end ring, and the wireless clamp type strain type torque sensor is installed on the component to be measured through the fixed installation holes.

[0017] As a further improvement of the present invention, a U-shaped groove is provided on the first elastomeric end ring and / or the second elastomeric end ring, and a through hole and a locking hole are respectively provided on both sides of the U-shaped groove, and also includes a locking piece which is sequentially penetrated through the through hole and the locking hole to adjust the opening degree of the U-shaped groove.

[0018] The wireless clamp-ring strain-type torque sensor provided by the utility model has the characteristics of low cost, simple operation, sufficient sensitivity, sufficient rigidity, high natural frequency, simple structure, easy processing and easy maintenance.

[0019] In a second aspect, the utility model provides a tool handle for a machine tool, comprising a tool handle body and the wireless clamp ring type strain type torque sensor, wherein the wireless clamp ring type strain type torque sensor is sleeved on the tool handle body in an interference fit manner.

[0020] The utility model combines a clamp ring type wireless torque sensor with a tool holder to design a tool holder that can wirelessly and real-time online test cutting torque, thereby realizing real-time monitoring of machine tool machining conditions, real-time monitoring of electric spindle output torque, fault diagnosis and tool wear monitoring, etc., which is of great significance to spindle development and matching, machine tool processing, and tool research and development.

[0021] As a further improvement of the utility model, it also includes a power supply module, a wireless module, a protective housing and a fixing member, wherein:

[0022] The power supply module and the wireless module are both mounted on the handle body and are electrically connected to the wireless clamp-type strain-type torque sensor;

[0023] The protective shell is sleeved on the outside of the wireless clamp type strain type torque sensor;

[0024] The fixing member is connected to the protective shell and the wireless clamp type strain type torque sensor respectively.

[0025] The utility model combines a clamp ring type wireless torque sensor to form a tool holder capable of wireless real-time online testing of cutting torque, thereby realizing real-time monitoring of machine tool machining conditions, real-time monitoring of electric spindle output torque, fault diagnosis and tool wear monitoring, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a cross-sectional view of an embodiment of the wireless clamp-type strain-type torque sensor of the utility model;

[0028] Figure 2 It is a three-dimensional perspective view of an embodiment of the wireless clamp-type strain-type torque sensor of the utility model;

[0029] Figure 3 It is a three-dimensional perspective view of another embodiment of the wireless clamp type strain type torque sensor of the utility model;

[0030] Figure 4 This is a front view of another embodiment of the wireless clamp-type strain-type torque sensor of the utility model;

[0031] Figure 5 It is an isometric view of another embodiment of the wireless clamp type strain type torque sensor of the utility model;

[0032] Figure 6 This is the front view of the knife handle of the utility model;

[0033] Figure 7 It is a cross-sectional view of the handle of the utility model;

[0034] Figure 8 It is a schematic diagram of the exploded structure of the knife handle of the utility model;

[0035] Fig. 9 It is a full bridge group bridge circuit diagram of the strain gauge in the wireless clamp type strain type torque sensor of the utility model;

[0036] Fig.10 It is another full-bridge bridge circuit diagram of the strain gauge in the wireless clamp-type strain-type torque sensor of the utility model;

[0037] Fig.11 This is a composition diagram of a signal processing test system composed of a wireless clamp-type strain-type torque sensor of the utility model.

[0038] In the figure, 1, the first elastomer end ring; 2, the second elastomer end ring; 3, the elastomer connecting column; 4, the strain gauge; 5, the wire hole; 6, the fixed installation hole; 7, the U-shaped slot; 8, the through hole; 9, the locking hole; 11, the tool handle body; 12, the wireless clamp type strain type torque sensor; 13, the power supply module; 14, the wireless module; 15, the protective shell; 16, the fixing part; 17, the tool handle wire hole; 18, the power supply module installation position; 19, the wireless module installation position. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0040] Embodiment 1:

[0041] In this embodiment, in order to solve the technical problem in the prior art that the torque sensor needs to cut off or modify the original structure of the shaft to be tested when testing the torque, the utility model provides a wireless clamp-type strain-type torque sensor.

[0042] The wireless clamp-ring strain-type torque sensor provided by the utility model has the advantages of no need to destroy the structure to be tested, easy installation and maintenance, wide application range, etc., and solves the problem that the original structure of the shaft to be tested needs to be cut off or modified when testing torque with a traditional torque sensor.

[0043] like Figure 1 and Figure 2 As shown, specifically, the wireless clamp type strain type torque sensor includes:

[0044] The first elastic end ring 1 is a circular ring structure and is used to be passed through the outside of one end of the component to be measured;

[0045] The second elastic end ring 2 is an arc-shaped structure, arranged parallel to the first elastic end ring 1 and spaced apart, and is used to be passed through the outer side of the other end of the component to be measured;

[0046] Two elastic connecting columns 3 are symmetrically arranged, and both ends are respectively connected to the first elastic end ring 1 and the second elastic end ring 2 to form a torque sensor with an I-shaped front view projection;

[0047] The strain gauge group is symmetrically installed on two elastic connecting columns.

[0048] The existing torque sensor can only cut off the test shaft and connect the cut shaft to the two ends of the sensor through a coupling. The torque sensor of the utility model has a different principle. The torque sensor converts the test shaft torque into the strain of the sensor strain gauge, converts the strain into an electrical signal, and converts it into a torque through a signal processing system.

[0049] Embodiment 2:

[0050] The difference between this embodiment 2 and embodiment 1 is that Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment, the connection position of the elastomeric connecting column 3 is specifically defined. In this embodiment, the elastomeric connecting column 3 is connected to the inner ring edges of the first elastomeric end ring 1 and the second elastomeric end ring 2.

[0051] Through this structural setting, the elastic body connecting column 3 is closely attached to the inner cavity of the wireless clamp-type strain-type torque sensor, so as to be as close as possible to the component to be measured, thereby reducing the transmission error.

[0052] Furthermore, in this embodiment, the strain gauge group includes eight strain gauges 4, four of which are grouped into two groups in total. One group of strain gauges 4 is arranged on each elastic connecting column 3, that is, four strain gauges 4 are arranged on each elastic connecting column 3.

[0053] like Figure 4 As shown, the cross section of the elastic column 3 in the present invention is a rectangle, and the strain gauge 4 can be attached to a side surface of the elastic column 3 with a larger specification.

[0054] In order to better receive the transmitted torque, in the present embodiment, each group of strain gauges 4 is divided into two pairs, and each pair of strain gauges 4 includes two strain gauges 4, wherein one pair of strain gauges 4 is relatively arranged at the top position of the elastomer connecting column 3. It should be noted here that the top position of the elastomer connecting column 3 refers to the connection between the elastomer connecting column 3 and the first elastomer end ring 1, and the other pair of strain gauges 4 is relatively arranged at the bottom position of the elastomer connecting column 3. It should be noted here that the bottom position of the elastomer connecting column 3 refers to the connection position between the elastomer connecting column 3 and the second elastomer end ring 2.

[0055] In order to ensure a better measurement effect, in this embodiment, the two pairs of strain gauges 4 are installed at the same position on the side of the elastic connecting column 3.

[0056] It should be noted here that Fig. 9 and Fig.10 As shown in the figure, it is a full-bridge bridge assembly diagram of two different strain gauges, where R1, R2, R3, R4, R5, R6, R7, and R8 are the resistances of each strain gauge. The specific strain gauges to be bridged need to be determined based on the designed sensor structure deformation. The full-bridge strain measurement circuit has the characteristics of high test accuracy.

[0057] Embodiment 3:

[0058] The difference between the present embodiment 3 and the present embodiment 2 is that, in order to facilitate the wiring of the wireless clip-on type strain-type torque sensor, in the present embodiment, a plurality of through-holes 5 are symmetrically arranged on the first elastic body end ring 1. It should be noted that a plurality of through-holes 5 can also be symmetrically arranged on the second elastic body end ring 2, and as to which end the through-holes 5 are arranged, it depends on the positions of the power supply module 13 and the wireless module 14 of the wireless clip-on type strain-type torque sensor.

[0059] In this embodiment, since the power module and the wireless module are both mounted on the handle body located on one side of the first elastic end ring 1 , a wire hole 5 is provided on the first elastic end ring 1 for the cable to pass through.

[0060] In this embodiment, there are two wire holes 5 , which are arranged on the first elastic end ring 1 at an angle of 180°.

[0061] For the convenience of installation, in this embodiment, a plurality of fixed installation holes 6 are symmetrically arranged on the second elastic end ring 2, and the fixed installation holes 6 are used to install the wireless clamp type strain type torque sensor on the component to be measured.

[0062] It should be noted here that if the wire-passing hole 5 is provided on the second elastomer end ring 2 , then the fixed installation hole 6 can be provided on the first elastomer end ring 1 .

[0063] Embodiment 4:

[0064] The difference between this embodiment 4 and embodiment 3 is that Figure 3 , Figure 4 and Figure 5 As shown, in order to achieve a more stable installation and a good clamping effect, a U-shaped groove 7 is provided on the first elastomer end ring 1 and / or the second elastomer end ring 2. Specifically, the U-shaped groove 7 extends vertically downward from the surface of the first elastomer end ring 1 or the second elastomer end ring 2, and the U-shaped groove 7 is penetrated along the thickness direction of the end ring. By providing the U-shaped groove 7, a notch is formed on the first elastomer end ring 1, and the inner diameter of the end ring can be adjusted by squeezing the notch, so that the wireless clamping ring strain type torque sensor can be clamped on the component to be measured; specifically, a through hole 8 and a locking hole 9 are respectively provided on both sides of the U-shaped groove 7, and also includes a locking member which is sequentially penetrated into the through hole and the locking hole to adjust the opening degree of the U-shaped groove.

[0065] When in use, the wireless clamping ring strain type torque sensor is integrally mounted on the outside of the component to be measured, and torque detection can be performed in a non-destructive state. Since the first elastomer end ring 1 and the inner ring of the second elastomer end ring 2 are used for mounting, a U-shaped slot 7 is provided, and a locking member such as a locking screw is sequentially passed through the through hole and then screwed into the locking hole 9 to adjust the opening of the U-shaped slot 7, thereby adjusting the inner diameter of the torque sensor sleeve, thereby enhancing the adjustment strength between the torque sensor and the tool handle body, and the intermediate test shaft can be locked by tightening the locking screw, thereby expanding the scope of use and reducing the requirements for the dimensional tolerance of the test shaft.

[0066] The wireless clamp-ring strain-type torque sensor provided by the utility model has the characteristics of low cost, simple operation, sufficient sensitivity, sufficient rigidity, high natural frequency, simple structure, easy processing and easy maintenance.

[0067] Embodiment 5:

[0068] In this embodiment 5, Figure 6-Figure 8 As shown, a tool handle for a machine tool is provided, comprising a tool handle body 11 and a wireless clamping ring type strain type torque sensor 12. The wireless clamping ring type strain type torque sensor 12 is sleeved on the tool handle body 11 in an interference fit manner.

[0069] The utility model combines a clamp ring type wireless torque sensor with a tool holder to design a tool holder that can wirelessly and real-time online test cutting torque, thereby realizing real-time monitoring of machine tool machining conditions, real-time monitoring of electric spindle output torque, fault diagnosis and tool wear monitoring, etc., which is of great significance to spindle development and matching, machine tool processing, and tool research and development.

[0070] Furthermore, in order to ensure the automatic measurement of the sensor, it also includes a power supply module 13, a wireless module 14, a protective housing 15 and a fixing member 16, wherein:

[0071] The power supply module 13 and the wireless module 14 are both mounted on the handle body 11 and are electrically connected to the wireless clamp-type strain-type torque sensor 12;

[0072] Furthermore, a power module installation position and a wireless module installation position that are recessed inward are respectively provided on opposite sides of the handle body 11. In order to facilitate wiring, a handle wire hole 17 is also provided on the handle body 11 below the power module installation position and the wireless module installation position, and the handle wire hole 17 is arranged opposite to the two wire holes 5 on the first elastic body end ring 1, so as to facilitate the extension and arrangement of the cables;

[0073] The protective shell 15 is sleeved on the outside of the wireless clip-ring type strain type torque sensor 12 to protect the wireless clip-ring type strain type torque sensor 12; in this embodiment, the protective shell 15 is a thin-walled cylindrical structure, and the handle body 11 has a raised ring at the top of the wireless clip-ring type strain type torque sensor 12, and the outer diameter of the raised ring is slightly larger than the outer diameters of the first elastic end ring 1 and the second elastic end ring 2 of the wireless clip-ring type strain type torque sensor 12; the top of the protective shell 15 abuts against the bottom of the raised ring, and the outer wall of the protective shell 15 is flush with the outer edge of the raised ring to improve the smooth and beautiful appearance of the handle. The bottom of the protective shell 15 has a sealed end, and a hole is opened at the sealed end for the handle body 11 to pass through;

[0074] The fixing member 16 can be a fixing bolt, and four connecting holes are opened on the sealed end of the protective shell 15. The four connecting holes are arranged opposite to the four fixed mounting holes 6 on the second elastomer end ring 2. During assembly, the fixing member 16 is screwed into the connecting holes and the fixed mounting holes 6 in turn to realize the connection between the protective shell 15 and the wireless clamp-type strain-type torque sensor 12.

[0075] The utility model combines a clamp ring type wireless torque sensor to form a tool holder capable of wireless real-time online testing of cutting torque, thereby realizing real-time monitoring of machine tool machining conditions, real-time monitoring of electric spindle output torque, fault diagnosis and tool wear monitoring, etc. Specific implementation method:

[0077] In order to successfully test the torque of the shaft without destroying its original structure, a method such as Figure 1 The clamp-ring torque sensor of the structure shown has eight strain gauges 4, four of which are grouped together, and the two groups of strain gauges 4 are respectively located at the same position on both sides of the elastic body connecting column 3; the wire holes 5 are wire holes for power supply and output signal; the fixed installation holes 6 are fixed threaded holes for fixing the sensor protection housing 15 to prevent various pollutions and protect the circuit.

[0078] The resistance strain gauge is pasted on the specified position of the surface of the elastic column 3. The elastic column 3 adopts a rectangular structure, which has the characteristics of simple structure, convenient processing, high sensitivity, etc. After analysis and simulation, the structure ε=ε1=-ε2=-ε3=ε4=ε7=-ε5=-ε8=ε7. Since the elastic column 3 is strained by force, the resistance of the resistance strain gauge changes. Through the measurement circuit (the measurement circuit can be either a half-bridge strain measurement circuit or a full-bridge strain test circuit), the strain is converted into an electrical signal (voltage, current, frequency, etc.).

[0079] In the actual test process, the bridge end often outputs non-zero under static load conditions due to factors such as the manufacturing process, temperature coefficient, installation error, and cable resistance of the strain gauge, which affects the test accuracy of the test system. In order to improve the sensitivity of the sensor and improve the test accuracy, a full-bridge strain measurement circuit can be used, such as Fig. 9 and Fig.10 However, when the test accuracy is not high, considering the hardware cost and the complexity of cable layout, a half-bridge strain measurement circuit can be used to complete the torque test task. In this embodiment, the torque sensor is applied to the handle body 11 (the structure is a rotating shaft), and the sensor rotates with the shaft, so only the wireless data transmission mode can be used.

[0080] Complete torque sensor signal processing test system, such as Fig.11 As shown. It includes sensor front-end module, torque signal conditioning module, bridge leveling module, data acquisition control module and wireless module. The strain gauge is arranged at the selected test point to form the sensor front-end module, completing the torque-strain signal conversion; the torque signal conditioning module includes a two-stage signal amplification circuit with adjustable gain, a filter circuit and a zero-point bias adjustment circuit, etc., making the signal easier to collect and process; the bridge leveling module includes a digital potentiometer, a digital-to-analog converter and corresponding circuits; the data acquisition control module and the wireless module are responsible for the acquisition, calculation, wireless transmission and reception of the conditioned torque signal and the system logic timing control, and the test data is displayed and recorded on the host computer through the wireless module.

[0081] In order to realize real-time monitoring of machine tool machining conditions, real-time monitoring of electric spindle output torque, fault diagnosis and tool wear monitoring, the clamp ring type wireless torque sensor is combined with the tool handle. Its appearance is shown in the figure Figure 6 As shown, the explosion diagram is as follows Figure 8 As shown, the cross-sectional view is Figure 7As shown. It includes a torque sensor 11, a power supply module 13, a handle body 11, a wireless module 14, a protective shell 15, a fixing part 16 (fixing bolt), a handle wire hole 17, a power supply module installation position 18, and a wireless module installation position 19. The wireless clamp type strain type torque sensor 12 and the handle body 11 can be connected by interference fit, which is convenient for transmitting torque to the wireless clamp type strain type torque sensor 12. The power supply module 13 supplies power to the entire system, and the wireless module 14 wirelessly transmits and receives signals. The two wire holes 5 on the wireless clamp type strain type torque sensor 12 and the two handle wire holes 17 on the handle body 11 are aligned with each other to facilitate the connection of various power supply cables with the power supply module 13 and the connection of signal transmission cables with the wireless module 14. The protective shell 15 of the sensor is used to seal the exposed part of the entire wireless clamp type strain type torque sensor 12 to protect the circuit of the wireless clamp type strain type torque sensor 12 and prevent various pollution. Use 4 fixing bolts and 4 fixing holes 6 on the wireless clamp type strain type torque sensor 12 to fix the protective housing 15 and the wireless clamp type strain type torque sensor 12 together to prevent it from falling off. Since the environment in which the tool handle is used is relatively complex and full of oil, gas, and liquid, protective measures are essential. At the same time, due to the high speed, the overall dynamic balance requirements are high, and the dynamic balance needs to be carefully adjusted to prevent excessive vibration during the test and affect the test results.

[0082] It should be noted here that the following method can also be used to achieve the connection between the wireless clamping ring strain type torque sensor 12 and the shank body 11. A locking nut is used for locking. The first elastomeric end ring 1 is deformed by the locking nut to lock the test shaft of the shank body 11. The tolerance requirement on the shaft can be reduced, and the first elastomeric end ring 1 and the test shaft can have a larger tolerance. When the aforementioned scheme is adopted, it is necessary to use a wireless clamping ring strain type torque sensor 12 to have an interference fit connection with the test shaft, which has high requirements on precision. Otherwise, it cannot be assembled and will become loose.

[0083] First of all, it should be explained here that “inward” refers to the direction toward the center of the accommodating space, and “outward” refers to the direction away from the center of the accommodating space.

[0084] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate directions or positional relationships based on the attached Figure 1The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0085] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0086] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0087] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0088] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0089] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A wireless clamp-type strain-type torque sensor, characterized in that: include: The first elastic end ring is a circular ring structure and is used to be passed through the outside of one end of the component to be measured; The second elastic body end ring is an arc-shaped structure, arranged parallel to and spaced from the first elastic body end ring, and is used to be passed through the outer side of the other end of the component to be measured; Two elastic connecting columns are symmetrically arranged, and two ends of the elastic connecting columns are respectively connected to the first elastic end ring and the second elastic end ring to form a torque sensor with an I-shaped front view projection; The strain gauge group is symmetrically mounted on the two elastic body connecting columns.

2. The wireless clamp-type strain-type torque sensor according to claim 1, characterized in that: The elastomeric connecting column is connected at the inner ring edges of the first elastomeric end ring and the second elastomeric end ring.

3. The wireless clamp-type strain-type torque sensor according to claim 1 or 2, characterized in that: The strain gauge group includes eight strain gauges, four of which form a group, and a group of strain gauges is arranged on each of the elastic body connecting columns.

4. The wireless clamp-type strain-type torque sensor according to claim 3, characterized in that: Each group of strain gauges is divided into two pairs, wherein one pair of strain gauges is relatively arranged at the top position of the elastic body connecting column, and the other pair of strain gauges is relatively arranged at the bottom position of the elastic body connecting column.

5. The wireless clamp-type strain-type torque sensor according to claim 4, characterized in that: The two pairs of strain gauges are installed at the same position on the side of the elastic body connecting column.

6. The wireless clamp-type strain-type torque sensor according to claim 3, characterized in that: The first elastic body end ring is symmetrically provided with a plurality of through-holes.

7. The wireless clamp-type strain-type torque sensor according to claim 1, characterized in that: A plurality of fixing and mounting holes are symmetrically arranged on the second elastic body end ring, and the wireless clamp-type strain-type torque sensor is installed on the component to be measured through the fixing and mounting holes.

8. The wireless clamp-type strain-type torque sensor according to claim 1, characterized in that: A U-shaped groove is provided on the first elastomeric end ring and / or the second elastomeric end ring, and a through hole and a locking hole are respectively provided on both sides of the U-shaped groove, and also includes a locking piece which is sequentially penetrated through the through hole and the locking hole to adjust the opening degree of the U-shaped groove.

9. A tool handle for a machine tool, characterized in that: It comprises a tool handle body and a wireless clip-on strain-type torque sensor as described in any one of claims 1 to 8, wherein the wireless clip-on strain-type torque sensor is sleeved on the tool handle body in an interference fit manner.

10. The knife handle according to claim 9, characterized in that: It also includes a power supply module, a wireless module, a protective housing and a fixing part, wherein: The power supply module and the wireless module are both mounted on the handle body and are electrically connected to the wireless clamp-type strain-type torque sensor; The protective shell is sleeved on the outside of the wireless clamp type strain type torque sensor; The fixing member is connected to the protective shell and the wireless clamp type strain type torque sensor respectively.

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