Torque measurement system and gearbox including torque measurement system

Abstract

The present application relates to a torque measurement system (100) comprising: a clamp (200) for supporting a wireless transmission, the clamp comprising a base plate (20) formed by detachably connecting two semi-ring bodies (210a, 210b) together, the base plate comprising an inner circumferential surface (22) configured to be clamped on a rotating shaft (12) and first and second opposite side surfaces, the first side surface (21) comprises two first areas corresponding to the arrangement of the two sensors, a second area for arranging a processing circuit, and a groove (34) which circumferentially extends around the inner circumferential surface and extends into the substrate (20) to arrange a coil wire of the wireless transmitting part; the inner peripheral surface (22) is provided with a groove (35) used for arranging an electric connecting piece which enables the two sensors to be electrically connected with the processing circuit. The utility model also relates to a gearbox comprising the torque measurement system.

Description

TECHNICAL FIELD

[0001] The present application relates to a torque measurement system, and a gearbox comprising the same. BACKGROUND

[0002] Gearboxes are important components of a transmission system, and are used for torque transmission and force transmission. It is often necessary to monitor the output shaft of the gearbox in real time.

[0003] A system for measuring torque on a rotating shaft using telemetry technology includes a wireless transmitting part that rotates with the measured shaft and a wireless receiving part that remains stationary. For a gearbox, it is difficult to reliably fix the wireless transmitting part to the output shaft due to the continuous rotation of the output shaft, resulting in a complex mechanical support structure for fixing the wireless transmitting part to the rotating shaft. The complex structure has poor versatility and is prone to failure or damage when the rotating shaft rotates at high speed. This in turn affects the wireless transmission of the electrical signal and the accuracy of the measurement. SUMMARY

[0004] The purpose of the present application is to provide an improved torque measurement system.

[0005] This object is achieved by the torque measurement system for a rotating shaft according to the present application. The torque measurement system according to the present application comprises a clamp for supporting a wireless transmitting part of the torque measurement system, the clamp comprising a base plate formed by two half-ring bodies separably connected together, the base plate comprising an inner circumferential surface configured to be clamped on a rotating shaft, and first and second side surfaces opposite in an axial direction, the first side surface comprising two first regions corresponding to an arrangement of two sensors of the wireless transmitting part, a second region for arranging a processing circuit electrically connected to the two sensors, and a groove extending circumferentially around the inner circumferential surface and extending into the base plate to arrange a coil wire of the wireless transmitting part, and a recess is formed on the inner circumferential surface for arranging an electrical connector electrically connecting the two sensors and the processing circuit.

[0006] In one embodiment, the first side surface comprises a plurality of protrusions, each of the two first regions and the second region is provided by a gap defined between adjacent protrusions, and the two first regions are oppositely arranged in a diametric direction.

[0007] In one embodiment, the base plate further comprises an outer circumferential surface opposite the inner circumferential surface, and a notch formed on the outer circumferential surface and configured to arrange an amplifier of the wireless transmitting part, wherein the groove extending in the circumferential direction is interrupted by the notch.

[0008] In one embodiment, the torque measurement system further comprises: the two sensors; the electrical connection; the processing circuit electrically connected with the two sensors through the electrical connection; the amplifier electrically connected with the processing circuit; and the coil wire electrically connected with the amplifier at both ends.

[0009] In one embodiment, two connecting structures are arranged in diametrically opposite positions on at least one of the first side and the second side and are used to connect the two half rings together.

[0010] In one embodiment, the torque measurement system further comprises: a bracket configured to be fixed to the stationary component; and a wireless receiving portion adjustably fixed to the bracket and used to be in non-contact wireless coupling with the wireless transmitting portion.

[0011] In one embodiment, the bracket comprises a first element adjustably connected with the wireless receiving portion and a second element adjustably connected with the first element.

[0012] In one embodiment, the first element and / or the second element has an L-shaped shape.

[0013] In one embodiment, the wireless receiving portion and the first element are adjustably connected in a radial direction perpendicular to an axial direction, the second element is adjustably connected with the first element in the axial direction, and the adjustably connected is achieved by a fastener passing through an elongated hole.

[0014] The application also provides a gear box comprising: the rotating shaft; the above-mentioned torque measurement system, wherein the inner circumferential surface is clampedly fixed to the outer circumferential surface of the rotating shaft; and the stationary component, which is a box body, an end cover connected to the box body, or another component fixed to the box body or the end cover.

[0015] The torque measurement system of the present application comprises a clamp in the form of a ring-shaped base plate for fixing the wireless transmitter to the rotating shaft (or sometimes also referred to as "measured shaft"), which is formed by connecting two halves together, the inner surfaces of which are clamped on the rotating shaft when connected together, achieving a fixed mounting on the rotating shaft. The rotating electrical part of the torque measurement system is arranged on one side of the ring-shaped base plate, which side comprises two first areas corresponding to the arrangement of the two strain sensors, a second area for arranging the processing circuit, and a groove for arranging the coil wire, the electrical connections for electrically connecting the sensors and the processing circuit are arranged in recesses on the inner periphery, and the amplifier is arranged in a notch formed on the outer periphery. This clamp, which only uses two (e.g. can be made by 3D printing) half-ring plate-shaped parts, achieves reliable and firm fixation of the rotating electrical part of the torque measurement system to the rotating shaft, while being simple in structure, easy to install and operate, and achieving stability and accuracy of wireless signal transmission. This clamp structure and this arrangement of the electrical components of the rotating electrical part make the occupied space in the gearbox as small as possible, without the need to make any modifications to the existing gearbox structure. More advantageously, the wireless receiver of the torque measurement system is in the form of a block with a notch, through which the wireless transmitter cuts when rotating with the rotating shaft. The wireless receiver is designed to be adjustably fixed to the stationary part of the gearbox in the radial and / or axial direction, which makes it possible to adjust the axial and / or radial spacing between the wireless receiver and the wireless transmitter by the installation of the wireless receiver, ensuring that the obtained axial and / or radial spacing is optimal for wireless signal transmission. For gearbox applications, the torque measurement system of the present application can perfectly fix the wireless transmitter by clamping a simple plate-shaped clamp to the rotating shaft, and adjustably fix the wireless receiver to the box body or end cover of the gearbox by a bracket, achieving accurate, reliable and stable torque measurement without the need to modify the internal structure and external connection size of the gearbox. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a schematic view of the torque measurement system of the present application for measuring torque on a rotating shaft for gearbox applications.

[0017] Figure 2 is another angle view of the gearbox with the end cover removed. Figure 1

[0018] Figure 3 is a perspective view of the clamp of the torque measurement system.

[0019] Figure 4 is a partial enlarged view showing the area of the wireless receiver of the torque measurement system.

[0020] Figure 5 ​is a schematic view of a bracket for mounting a wireless receiving portion. DETAILED DESCRIPTION

[0021] A torque measurement system that employs wireless or telemetry technology to measure torque on a rotating shaft is described in detail below with reference to the accompanying drawings. The examples presented in the drawings are applications of the torque measurement system of the present application in a gear box, but the torque measurement system of the present application is not limited to this application and can be applied to other applications that require measurement of torque on a rotating shaft.

[0022] Reference Figure 1 is shown. In the illustrated example, the rotating shaft 12 is the measured shaft to which the torque measurement system 100 is applied, which can be, but is not limited to, an output shaft of the gear box. The end cover 14 is an example of a stationary component that remains stationary during operation, which can be an integral part of the housing or any stationary component that is fastened to the housing in any manner so as to remain stationary during operation of the gear box. Thus, the end cover 14 can refer to any stationary component of the gear box, or be replaced by other stationary components.

[0023] The directional terms "axial direction" as used in the present application refer to the direction of the central axis X of the rotating shaft 12, "circumferential direction" refers to the direction around the central axis X, and "radial direction" refers to the direction perpendicular to the central axis X.

[0024] Generally, the torque measurement system 100 of the present application can include an electrical portion and a mechanical support portion. The electrical portion can further include a wireless transmitting portion and a wireless receiving portion. The wireless transmitting portion is fixed to the rotating shaft so as to rotate synchronously with the rotating shaft during operation, and is thus also referred to as a rotating electrical portion. The wireless receiving portion is fixed to the stationary component so as to remain stationary during operation, and is thus also referred to as a fixed (or stationary) electrical portion.

[0025] The wireless transmitting part includes first and second sensors for sensing the strain on the rotating shaft 12 due to the torque, a processing circuit electrically connected to the first and second sensors to convert the strain signals sensed by the sensors into electrical signals, an amplifier electrically connected to the processing circuit to process or amplify the electrical signals generated by the processing circuit, and a coil wire electrically connected to the amplifier to transmit the wireless signals under the action of the generated electromagnetic field. The wireless receiving part is wirelessly coupled with the electromagnetic field generated by the wireless transmitting part, specifically the coil wire, to receive the transmitted electrical signals, and then transmits the received electrical signals to, for example, a control unit (not shown in the figure) electrically connected thereto. The electrical principle and control principle related thereto are known in the art and will not be described in detail herein. As an example, the first and second sensors can be any strain sensor known in the art, such as a strain gauge. In the illustration, two strain sensors are used, which are bonded to the outer circumferential surface of the rotating shaft 12 at diametrically opposite positions of the rotating shaft 12, but the application does not limit the fixing manner of the strain sensors to the rotating shaft, the number of sensors, and the corresponding configuration of the processing circuit. As an example, the processing circuit can be, but is not limited to, a Wheatstone full-bridge circuit configuration known in the art, which is electrically connected to the two sensors respectively via electrical connections (such as copper wires) to receive the strain signals or data sensed by each sensor, and sends the electrical signals to the amplifier via the output terminal for further processing or amplification. Both ends of the coil wire are electrically connected to the amplifier so that the electrical signals processed or amplified by the amplifier are transmitted via the electromagnetic field generated by the coil wire.

[0026] Only the wireless receiving part in the electrical part of the torque measurement system 100 is shown in the figure, denoted by reference numeral 150. The wireless receiving part 150 of the present application has a block structure with a notch 180, or in other words, has a U structure as shown in the illustration. The wireless receiving part 150 is described here as a block structure, which is intended to distinguish from the wireless receiving part in the form of a ring surrounding the rotating shaft 12. Basically, the wireless receiving part of the block structure of the present application can have dimensions substantially equivalent in the axial direction, the radial direction, and the circumferential direction.

[0027] According to the torque measurement system 100 of the present application, the notch 180 of the wireless receiving part 150 extends through the wireless receiving part 150 substantially along the circumferential direction, and its size is designed and mounted relative to the wireless transmitting part (or relative to the rotating shaft 12) so that the coil wire of the wireless transmitting part cuts through the notch 180 when the rotating shaft rotates, while maintaining the predetermined spacing, including the predetermined radial spacing and the predetermined axial spacing, between the wireless transmitting part, specifically its coil wire, and the wireless receiving part 150, to achieve the best wireless coupling effect and signal stability.

[0028] The preset distance between the wireless transmitting part and the wireless receiving part 150 is achieved by a mechanical support portion of the torque measurement system 100. Specifically, the mechanical support portion includes a clamp 200 for supporting the rotating electrical portion or the wireless transmitting part and configured to be fixed to the rotating shaft 12 to make the wireless transmitting part rotate synchronously with the rotating shaft 12, and a bracket 300 for supporting the stationary electrical portion or the wireless receiving part and configured to be fixed to the stationary part, specifically the end cover 14, to make the wireless receiving part remain stationary during operation. Details are described below with reference to the drawings.

[0029] In particular, with reference to Figure 2 and 3 , the clamp 200 is formed by two halves 210a, 210b that are separably connected together. The two halves 210 are each substantially semi-annular in structure, can be mirror images of each other, and are connected together to form the clamp 200 in substantially whole annular form. In the specific embodiment shown, the clamp 200 formed by the two halves 210 connected together can be a simple annular plate member. The clamp 200 can include an annular base plate 20 having a central aperture 25 that allows the rotating shaft 12 to extend therethrough. Figure 3 When the two halves 210a, 210b are connected together and fixed to the rotating shaft 12, the inner peripheral surface 22 defining the central aperture 25 is clamped onto the rotating shaft 12 in an interference fit. The base plate 20 has a first side surface 21 and a second side surface 23 that are opposite in the axial direction, preferably but not necessarily, substantially perpendicular to the axial direction. The base plate 20 of the clamp 200 includes an outer peripheral surface 32 opposite the inner peripheral surface 22, which can be substantially cylindrical, but is not limited thereto.

[0030] The base plate 20 includes a plurality of protrusions 24a-24f (sometimes referred to generically as 24 in the description) protruding from the first side surface 21. These protrusions are arranged spaced apart in the circumferential direction, and gaps 26a-26d for mounting electrical elements are defined between adjacent protrusions. For example, in the example shown, gaps 26a, 26b, 26c, and 26d are defined between protrusions 24a and 24b, between protrusions 24b and 24c, between protrusions 24c and 24d, and between protrusions 24e and 24f, respectively. Although in the example shown, the base plate 20 composed of the two halves 210a and 210b collectively defines six protrusions, in which protrusions 24a, 24b, 24c, 24d and gaps 26a, 26b, 26c are provided by the first half 210a, and protrusions 24e and 24f and gap 26d are provided by the second half 210b.

[0031] As an example, gaps 26c and 26d can be diametrically opposite to each other, corresponding to the locations where the two strain sensors of the wireless transmitter are arranged or attached (e.g. glued) on the rotating shaft 12, gap 26a can be configured to arrange the processing circuitry, and gap 26b corresponds to the location where the amplifier of the wireless transmitter is arranged or mounted (a recess 36 will be described later). It is understood by those skilled in the art that the number, shape, size, arrangement of the protrusions and the number and size of the gaps defined thereby can be varied as needed, depending on the actual (e.g. spatial) requirements of the electrical components of the torque measurement system 100 to be arranged.

[0032] In the illustrated example, in relation to each protrusion on the first side 21 of the base plate 20, there is also included a connection structure connecting the two halves 210a and 210b together, for example at least two connection structures diametrically opposite to each other. Specifically, the two halves 210a and 210b include ear portions 28a and 28b extending from respective protrusions 24a and 24f, respectively, and ear portions 28c and 28d extending from respective protrusions 24d and 26e, respectively, and a first fastener (not shown) passes through holes (indicated by 29a in the drawings) formed in the ear portions 28a and 28b to connect the two halves 210a and 210b together, and a second fastener 31 (indicated by 29b in the drawings) passes through holes formed in the ear portions 28c and 28d to connect the two halves 210a and 210b together. Figure 3 Figure 2 Figure 3

[0033] The two connection structures on the first side 21 are shown in detail in the drawings. It is envisaged that two connection structures can also be symmetrically arranged on the second side 23. The connection structures on the second side 23 can be identical to those on the first side 21 or not, as long as they can serve the purpose of connection. Depending on the need, the protrusion arrangement 27 on the second side 23 can be identical to or different from that on the first side 21, as can be seen in the drawings. Figure 1

[0034] The clamp 200 of the present application achieves easy and reliable mounting and fixing of the rotating electrical part of the torque measurement system to the clamp 200 and to the rotating shaft 12 by means of fasteners (e.g. screws) connecting the two halves 210a and 210b together. However, it is understood that the present application is not limited to the illustrated fastener connection means connecting the two halves 210a and 210b together.

[0035] Reference is next made to Figure 2 and 3 ​​​​The substrate 20 further includes a groove 34 extending from the first side 21 into the substrate 20 in the axial direction and extending entirely in the circumferential direction near the outer peripheral surface 32, and a cutout 36 formed on the outer peripheral surface 32. In the axial direction, the groove 34 can extend a portion of the thickness of the substrate 20 and is designed to house a coil wire (e.g., a flat copper wire) of the wireless transmission unit. In the axial direction, the cutout 36 can extend entirely through the thickness of the substrate 20 and is designed to house an amplifier of the wireless transmission unit and other associated electrical components. The cutout 36 breaks the groove 34 extending in the circumferential direction or both ends of the groove 34 are open to the cutout 36 such that both ends of the coil wire of the wireless transmission unit are electrically connected to the amplifier (not shown) housed in the cutout 36. Optionally, the cutout 36 can include an auxiliary support or mounting structure in the form of a rib 38 extending from the substrate 20, from one or both of the first side 21 and the second side 23 of the substrate 20, which can have any suitable number, shape and size for supporting or securing the amplifier 39 Figure 4 ) and other auxiliary electrical elements of the wireless transmission unit. Also shown schematically is a hole 33 Figure 3 ) in the rib 38 for mounting the amplifier or electrical elements. The gap 26b is positioned in correspondence with the cutout 36 to facilitate the placement of the rib 38 and the mounting of the electrical components such as the amplifier 39, etc.

[0036] It can also be seen from Figure 3 that the inner peripheral surface 22 of the substrate 20 of the clamp 200 has a recess 35 formed therein which extends generally (but not necessarily strictly) in the circumferential direction. For example, the recess 35 extends at least from a position corresponding to the gaps 26c and 26d (i.e., each strain sensor attached to the rotating shaft 12) to a position of the gap 26a (i.e., the processing circuit housed therein) to accommodate electrical connections (e.g., copper wires) for electrically communicating the respective sensors with the processing circuit.

[0037] As described above with respect to Figure 2 and 3In detail, the base plate 20 of the clamp 200 provides, on the same side 21, areas (clearances 26c and 26d) for the arrangement of the sensors, an area (clearance 26a) for the arrangement of the processing circuit, a structure or feature (groove 34) for the arrangement of the coil wires of the wireless transmission part, on the outer peripheral surface 32 an area (notch 36) for the mounting of the amplifier of the wireless transmission part, on the inner peripheral surface 22 of the base plate 20 a feature (groove 35) for the arrangement of the electrical connections connecting the sensors and the processing circuit. In other words, for the torque measurement system 100 of the present application, all the electrical components of the rotating electrical part are arranged on one annular plate, i.e. the base plate 20, and on the same side 21 and on the inner or outer peripheral surface, the structure is very simple and the internal space of the gearbox is maximally saved, thus enabling any internal or external modification of the gearbox.

[0038] The bracket 300 of the mechanical support part of the torque measurement system 100 will now be described in detail, the bracket 300 being designed to be fixed or connected to a stationary component, for example the end cover 14 shown, for supporting the wireless receiving part 150 of the torque measurement system 100 which is not coupled to the wireless transmission part.

[0039] As mentioned above, the wireless receiving part 150 is fixed to a stationary component of the gearbox by means of the bracket 300, so as to ensure that the coil wires of the wireless transmission part arranged in the groove 34 extend through the slot 180 of the wireless receiving part 150 and have a predetermined axial spacing from the two side surfaces 182 and 184 defining the slot 180 and a predetermined radial spacing from the bottom surface 186 defining the slot. In other words, the outer peripheral portion of the base plate 20 containing the groove 34 extends into the slot 180 of the wireless receiving part 150 but does not contact the wireless receiving part 150, the base plate 20 supporting the coil wires cutting through the slot 180 in the circumferential direction when the base plate 20 rotates with the rotating shaft 12.

[0040] In order to obtain the predetermined axial and radial spacing mentioned above, the bracket 300 of the present application enables the adjustable mounting of the wireless receiving part 150 to a stationary component of the gearbox (end cover 14). With the clamp 200 and the wireless transmission part fixed to the rotating shaft 12, the adjustment of the wireless receiving part 150 with respect to the wireless transmission part in the axial and radial directions is achieved in order to achieve the predetermined axial and radial spacing.

[0041] According to the principles of the present application, the "adjustable" can be achieved by an adjustable mounting (or connection) of the wireless receiver 150 to the bracket 300, and / or an adjustable connection between the internal components of the bracket 300 (the two elements 40 and 50 described below), and / or an adjustable mounting (or connection) of the bracket 300 to the end cap 14, the illustrated embodiments of the present application including the first two.

[0042] In the illustrated embodiment, the bracket 300 comprises two elements 40 and 50 connected to each other, wherein the wireless receiver 150 is fixed to the first element 40 of the bracket 300 in an adjustable manner in a substantially radial direction, the first element 40 is connected to the second element 50 in an adjustable manner in a substantially axial direction, and the second element 50 is connected to the end cap 14 by itself.

[0043] With particular reference to Figure 4 and 5 , both elements 40 and 50 are substantially L-shaped. The first element 40 comprises a first portion 42 and a second portion 44 connected to each other, and the second element 50 comprises a third portion 52 and a fourth portion 54 connected to each other. The first portion 42 of the first element 40 comprises an elongated hole 41 through which a first fastener 43 Figure 4 extends and is connected into a corresponding hole (not shown in the figures) formed on the wireless receiver 150. The elongated hole 41 is structured to achieve the adjustable connection of the first element 40 (or the bracket 300) and the wireless receiver 150 in the radial direction. The elongated hole 41 can, but not necessarily, be provided as two as illustrated. It is conceivable that the elongated hole 41 can also extend in a curved manner, so that the wireless receiver 150 and the first element 40 can achieve a more flexible relative adjustment.

[0044] The second portion 44 of the first element 40 and the third portion 52 of the second element 50 are connected by a second fastener 45 Figure 4 . At least one of the second hole 47 Figure 5 on the second portion 44 of the first element 40 for the second fastener 45 to pass through, and the third hole 49 Figure 5 on the third portion 52 of the second element 50 for the second fastener 45 to pass through (in the illustrated example, the third hole 49) is an elongated hole, so that when connecting the first and second elements 40 and 50, a relative adjustment between them can be made in the elongation direction of the third hole 49 (i.e. in the substantially axial direction), thereby achieving the purpose of adjusting the wireless receiver 150 in the axial direction. The third hole 49 can be linearly elongated as illustrated, or can be curvedly elongated.

[0045] The fourth portion 54 of the second element 50 comprises a hole 51 Figure 5 for allowing a third fastener 53 Figure 4) extends through into a corresponding hole formed on the end cover 14 to achieve the mounting of the second element 50 to the end cover 14.

[0046] In this way, by means of the adjustable connection between the first element 40 (of the second portion 44) and the second element 50 (of the third portion 52), an adjustable mounting of the wireless receiving portion 150 with respect to the end cover 14 in the axial direction is achieved, allowing to obtain a preset axial spacing between the wireless receiving portion 150 and the wireless transmitting portion; by means of the adjustable connection between the first element 40 (of the first portion 42) and the wireless receiving portion 150, an adjustable mounting of the wireless receiving portion 150 with respect to the bracket 300, and thus with respect to the end cover 14, in the radial direction is achieved, allowing to obtain a preset radial spacing between the wireless receiving portion 150 and the wireless transmitting portion.

[0047] Optionally, the hole 51 on the fourth portion 54 of the second element 50 can also be an elongated hole, for example to allow an adjustment of the second element 50 with respect to the end cover 14 in a substantially radial direction. The number of holes 51 can also be more than one.

[0048] So far, the wireless transmitting portion of the torque measurement system 100 of the present application is simply, reliably and stably fastened to the rotating shaft 12 by means of the simple plate-like form of the clamp 200, the wireless receiving portion 150 is achieved by means of the bracket 300 to the adjustable mounting to the stationary component, and by means of simple mounting steps it is possible to obtain the desired radial and axial spacing between the wireless receiving portion 150 and the wireless transmitting portion, achieving the integrity, accuracy and stability of the wireless transmission of the signal.

[0049] It should be understood that the torque measurement system 100 of the present application, although it employs a simple base plate 20 as a clamp 200 to achieve the simplest, most space-saving mounting and fixing of the wireless transmitting portion, is not limited to the specific example illustrated. For example, the two halves of the base plate 20 can be regular half-ring bodies as illustrated, whose opposite surfaces come into contact with each other when they are connected together and clamped on the rotating shaft 12. However, the present application also envisages that the two halves do not come into contact with each other when they are connected together, which is more advantageous for the clamping effect and is more adaptable to rotating shafts of different outer diameters. The present application also envisages that the opposite surfaces of the two halves are not simply flat, but have stepped or curved surfaces with complementary shapes.

[0050] For example, the first region on the first side 21 of the base plate 20 corresponding to the strain sensors and the second region for arranging the processing circuitry do not necessarily have to be delimited by the protrusions 24a-24f, the grooves 35 for arranging the electrical connections are not limited to being provided on the inner peripheral surface 22, and the trenches 34 for arranging the coil wires are also not limited to the details illustrated.

[0051] For example, the wireless receiving portion of the substantially block-like structure is not limited to the substantially U-shaped structure shown, but is intended to refer to any substantially block-like structure that is distinguished from a ring-like structure that surrounds the rotation axis 12, the dimensions of which in the circumferential direction, the radial direction, and the circumferential direction are substantially equivalent.

[0052] The present application has been described above with reference to two embodiments in the drawings. However, a person of ordinary skill in the art, after reading this document, can make several changes and modifications without departing from the principles of the application, and these changes and modifications are within the scope of the application. The scope of the application is only limited by the appended claims.

Claims

1. A torque measurement system (100) for measuring torque on a rotating shaft (12), comprising: A clamp (200) for supporting a wireless transmitting portion of a torque measurement system (100), the clamp comprising a base plate (20) formed by separably connecting two half rings (210a, 210b) together, the base plate comprising an inner circumferential surface (22) configured to be clamped on a rotating shaft (12), and first and second side surfaces (21, 23) opposite in an axial direction, the first side surface (21) comprising two first regions corresponding to an arrangement of two sensors of the wireless transmitting portion, a second region for arranging a processing circuit electrically connected to the two sensors, and a groove (34) extending circumferentially around the inner circumferential surface and into the base plate (20) for arranging coil wires of the wireless transmitting portion, and a recess (35) formed on the inner circumferential surface (22) for arranging an electrical connector electrically connecting the two sensors and the processing circuit.

2. The torque measuring system (100) according to claim 1, characterized in that The first side surface (21) comprises a plurality of protrusions (24a-24f), each of the two first regions and the second region being provided by a gap defined between adjacent protrusions, and the two first regions being diametrically oppositely arranged.

3. The torque measuring system (100) according to claim 2, characterized in that The base plate (20) further comprises an outer circumferential surface (32) opposite the inner circumferential surface (22), and a notch (36) formed on the outer circumferential surface (32) and configured for arranging an amplifier of the wireless transmitting portion, wherein the groove (34) extending in the circumferential direction is broken by the notch (36).

4. The torque measuring system (100) according to claim 3, characterized in that Further comprising: the two sensors; the electrical connector; the processing circuit electrically connected to the two sensors through the electrical connector; the amplifier electrically connected to the processing circuit; the coil wires both electrically connected to the amplifier.

5. The torque measuring system (100) according to claim 4, characterized in that Two connecting structures oppositely arranged in the diametrical direction and for connecting the two half rings together are provided on at least one of the first side surface (21) and the second side surface (23).

6. The torque measuring system (100) according to any one of claims 1-5, characterized in that, Further comprising: a bracket (300) configured to be fixed to a stationary component; and a wireless receiving portion (150) adjustably fixed to the bracket (300) and for non-contact wireless coupling with the wireless transmitting portion.

7. The torque measuring system (100) according to claim 6, characterized in that The bracket (300) comprises a first element (40) adjustably connected to the wireless receiving portion (150) and a second element (50) adjustably connected to the first element (40).

8. The torque measuring system (100) according to claim 7, characterized in that The first element (40) and / or the second element (50) have an L-shaped shape.

9. The torque measuring system (100) according to claim 8, characterized in that The wireless receiving portion (150) and the first element (40) are adjustably connected in a radial direction perpendicular to the axial direction, and the second element (50) is adjustably connected to the first element (40) in the axial direction, the adjustably connecting being achieved by a fastener passing through an elongated hole.

10. A gear box characterized in that, Comprising: the rotating shaft (12); The torque measurement system (100) according to any one of claims 6-9, wherein the inner circumferential surface (22) is clamped and fixed to an outer circumferential surface of the rotating shaft (12); and The stationary component is a tank, an end cap (14) connected to the tank, or another component secured to the tank or end cap.

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