Torque sensor assembly and mid-transmission

Abstract

The utility model relates to the technical field of transmissions, and provides a torque sensor assembly and a middle transmission. The torque sensor assembly provided by the utility model is used for being installed on a transmission shaft, and the transmission shaft is provided with a transmission member which can rotate in the circumferential direction. The torque sensor assembly comprises a fixing piece, a torque measuring piece, a first circuit assembly and a second circuit assembly. The fixed part comprises a fixed part fixedly installed on the transmission shaft in the circumferential direction and a force arm arranged on the fixed part in a protruding mode, the force arm is connected with the transmission part, the torque measuring part is installed on the force arm, the first circuit assembly is fixedly installed on the transmission shaft, and the first circuit assembly is in communication connection with the torque measuring part and the second circuit assembly. The second circuit assembly sleeves the transmission shaft and can rotate relative to the first circuit assembly, so that the occupied space of the torque sensor can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transmissions, and in particular to a torque sensor assembly and a mid-mounted transmission. Background Art

[0002] By arranging a torque sensor in a mid-mounted transmission, the torque during the rotation of the shaft of the mid-mounted transmission can be detected, providing a basis for the shift timing or fault analysis of the mid-mounted transmission. In order to adapt to the torque sensor, it is necessary to consider the installation method and installation position of the torque sensor during the design process of the mid-mounted transmission, increasing the volume of the mid-mounted transmission. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a torque sensor assembly and a mid-mounted transmission, aiming to solve the problem that the torque sensor in the prior art occupies a large space.

[0004] In a first aspect, the present application provides a torque sensor assembly for being installed on a transmission shaft, on which a circumferentially rotatable transmission member is installed; the torque sensor assembly includes a fixing member, a torque measuring member, a first circuit assembly and a second circuit assembly; the fixing member includes a fixing portion circumferentially fixed on the transmission shaft and an arm protruding from the fixing portion, the arm is connected to the transmission member, the torque measuring member is installed on the arm, the first circuit assembly is fixedly installed on the transmission shaft, the first circuit assembly is communicatively connected to the torque measuring member and the second circuit assembly, and the second circuit assembly is sleeved on the transmission shaft and is relatively rotatable with respect to the first circuit assembly.

[0005] In an embodiment, the first circuit assembly includes a first circular ring cavity and a first circuit module installed in the first circular ring cavity, and the second circuit assembly includes a second circular ring cavity and a second circuit module installed in the second circular ring cavity; the first circular ring cavity is fixedly sleeved on the transmission shaft, and the second circular ring cavity is relatively rotatably sleeved outside the first circular ring cavity.

[0006] In an embodiment, the second circular ring cavity is provided with a mounting hole for installing the second circular ring cavity on the housing where the torque sensor assembly is located.

[0007] In an embodiment, the torque sensor assembly further includes a spline sleeve fixedly installed on the transmission shaft, the transmission member is circumferentially rotatably installed on the spline sleeve, and the fixing portion is circumferentially fixed on the spline sleeve.

[0008] In an embodiment, one side of the first circular ring cavity abuts against the spline sleeve.

[0009] In one embodiment, the first circuit module includes a first processing circuit and a first coil that are electrically connected to each other, and the second circuit module includes a second processing circuit and a second coil that are electrically connected to each other; the first processing circuit is communicatively connected to the torque measuring member, and is configured to convert the torque signal collected by the torque measuring member into a modulation signal, and transmit the modulation signal to the second coil through the first coil; the second coil is configured to transmit the modulation signal to the second processing circuit, and the second processing circuit is configured to convert the modulation signal into the torque signal and then transmit it to the controller; the second processing circuit is further configured to convert the obtained electrical energy into a pulse signal, and transmit the pulse signal to the first coil through the second coil; the first coil is further configured to transmit the pulse signal to the first processing circuit, and the first processing circuit is further configured to rectify the pulse signal, thereby powering the first circuit module.

[0010] In one embodiment, the first circuit module further includes an energy storage circuit electrically connected to the first processing circuit to store the electrical energy output by the first processing circuit.

[0011] In one embodiment, the torque measuring member includes at least one set of pressure strain gauges, and each set of pressure strain gauges includes two pressure strain gauges, and the two pressure strain gauges are respectively attached to the two force arms.

[0012] In one embodiment, the transmission member is provided with an avoidance hole, and the fixing portion extends into the avoidance hole.

[0013] In a second aspect, the present application provides a mid-mounted transmission, including the torque sensor assembly described in the first aspect.

[0014] The beneficial effects of the torque sensor assembly provided by the present utility model are as follows: The torque sensor assembly includes a fixing member, a torque measuring member, a first circuit assembly, and a second circuit assembly. The fixing portion of the fixing member is circumferentially fixedly installed on the transmission shaft. By connecting the force arm of the fixing member to the circumferentially rotatable transmission member, the transmission member can be fixed on the shaft, eliminating devices such as snap rings for fixing the transmission member. At the same time, the torque measuring member is installed on the force arm, and the first circuit assembly and the second circuit assembly are sleeved on the transmission shaft, which can make the torque sensor assembly more reasonably arranged on the transmission shaft and reduce the occupied space of the torque sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art.

[0016] Figure 1Schematic diagram of the assembly of the torque sensor assembly provided by the embodiment of the present utility model on the transmission shaft;

[0017] Figure 2 Exploded view of the torque sensor assembly provided by the embodiment of the present utility model;

[0018] Figure 3 Connection diagram of the first circuit module and the second circuit module provided by the embodiment of the present utility model.

[0019] Among them, each reference numeral in the figure:

[0020] 11, fixing member; 111, fixing part; 112, force arm; 12, first circuit component; 121, first circular cavity; 13, second circuit component; 131, second circular cavity; 132, mounting hole; 20, transmission shaft; 30, transmission member; 31, avoidance hole; 40, spline sleeve. Detailed implementation manners

[0021] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation of the present utility model.

[0022] Referring to "one embodiment" or "embodiments" throughout the specification means that the specific features, structures or characteristics described in connection with the embodiments are included in at least one embodiment of the present application. Therefore, the phrases "in one embodiment" or "in some embodiments" appearing throughout the specification do not all refer to the same embodiments. In addition, in one or more embodiments, the specific features, structures or characteristics may be combined in any suitable manner.

[0023] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0024] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0025] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] Please refer to Figures 1-3 , and a torque sensor assembly in an embodiment of the present utility model will be described hereinafter.

[0027] The torque sensor assembly in the embodiment of the present utility model is used in a mid-mounted transmission. The torque sensor assembly is used to be mounted on a rotatable transmission shaft 20, and a circumferentially rotatable transmission member 30 is mounted on the transmission shaft 20. The transmission member 30 may be a gear or other device that can rotate synchronously with the transmission shaft 20.

[0028] The torque sensor assembly includes a fixing member 11, a torque measuring member, a first circuit assembly 12, and a second circuit assembly 13; the fixing member 11 includes a fixing portion 111 circumferentially fixedly mounted on the transmission shaft 20 and an arm 112 protruding from the fixing portion 111. The arm 112 is connected to the transmission member 30, and the torque measuring member is mounted on the arm 112. Since the fixing member 11 is circumferentially fixedly mounted on the transmission shaft 20 and the transmission member 30 is connected to the arm 112, the transmission member 30 can be fixed circumferentially, so that the transmission member 30 is fixed on the transmission shaft 20 and rotates synchronously with the transmission shaft 20. Thus, the device for fixing the transmission member 30 can be omitted, saving the occupied space of the transmission member 30 and the torque sensor assembly on the transmission shaft 20. Herein, the axial direction is referenced by the axial direction of the transmission shaft 20, and the circumferential direction is referenced by the circumferential direction of the transmission shaft 20.

[0029] The first circuit assembly 12 is fixedly mounted on the transmission shaft 20. The first circuit assembly 12 is communicatively connected to the torque measuring member and the second circuit assembly 13. The second circuit assembly 13 is sleeved on the transmission shaft 20 and is relatively rotatable with respect to the first circuit assembly 12. The torque signal collected by the torque measuring member is sent to the controller of the torque sensing assembly through the first circuit assembly 12 and the second circuit assembly 13. The above structural design of the torque sensor assembly is more compact, reducing the occupied space of the torque sensor assembly on the transmission shaft 20.

[0030] In some middle-mounted transmissions, the fixing member 11 is located inside the transmission member 30 and connected to the transmission member 30, or the fixing member 11 and the transmission member 30 are integrally formed, that is, the force arm 112 is located inside the transmission member 30, and the measurement of the torque signal can also be achieved. However, in this structural design, the force on each force arm 112 is uneven. In the present application, the fixing member 11 and the transmission member 30 are separately designed. Axially, the fixing member 11 is located on one side of the transmission member 30, and the force arm 112 is connected to the transmission member 30, which can make the force on the force arm 112 more balanced, and further enable the torque measuring member to collect more accurate torque signals.

[0031] In one embodiment, the first circuit assembly 12 is fixed to the transmission shaft 20 through the fixing portion 111. For example, the first circuit assembly 12 is threadedly connected to the fixing portion 111, so that the components for fixing the first circuit assembly 12 on the transmission shaft 20 can be reduced, and the structure of the transmission shaft 20 is simplified.

[0032] In one embodiment, the first circuit assembly 12 includes a first circular cavity 121 and a first circuit module installed in the first circular cavity 121, and the second circuit assembly 13 includes a second circular cavity 131 and a second circuit module installed in the second circular cavity 131; the first circular cavity 121 is fixedly sleeved on the transmission shaft 20, and the second circular cavity 131 is relatively rotatably sleeved outside the first circular cavity 121, so that the occupied space of the first circuit assembly 12 and the second circuit assembly 13 can be reduced, and further the size of the transmission shaft 20 can be shortened.

[0033] In another embodiment, both the first circular cavity 121 and the second circular cavity 131 can be sleeved on the transmission shaft 20.

[0034] In one embodiment, the second circular cavity 131 is provided with a mounting hole 132 for mounting the second circular cavity 131 on the housing where the torque sensor assembly is located, so that the second circular cavity 131 can be more firmly fixed when the transmission shaft 20 rotates.

[0035] In one embodiment, the torque sensor assembly further includes a spline sleeve 40 fixedly installed on the transmission shaft 20. The transmission member 30 is circumferentially rotatably installed on the spline sleeve 40, and the fixing portion 111 is circumferentially fixedly installed on the spline sleeve 40, so that the transmission member 30 can be fixed to the transmission shaft 20 through the spline sleeve 40, and it is convenient for installation.

[0036] In one embodiment, the spline sleeve 40 is detachably installed on the transmission shaft 20, which further facilitates the assembly of the transmission shaft 20. Among them, a plurality of detachable spline sleeves 40 can be provided on the transmission shaft 20 to be respectively used for installing the transmission member 30 and other devices.

[0037] In one embodiment, one side of the first annular cavity 121 abuts against the spline sleeve 40. Therefore, the spline sleeve 40 can restrict the movement of the first annular cavity 121 in the circumferential direction, eliminating the fixing member of the first annular cavity 121 and saving the installation space. At the same time, one side of the first annular cavity 121 also abuts against the fixing portion 111 to restrict the movement of the fixing member 11 in the circumferential direction, further saving the installation space.

[0038] In one embodiment, an avoidance hole 31 is provided on the transmission member 30, and the avoidance hole 31 is sleeved on the fixing portion 111, so as to reduce the occupied space of the fixing member 11, and thus the size of the transmission shaft 20 can be shortened.

[0039] In one embodiment, the first circuit module includes a first processing circuit and a first coil that are electrically connected to each other, and the second circuit module includes a second processing circuit and a second coil that are electrically connected to each other; the first processing circuit is communicatively connected (wired connection or wireless connection such as Bluetooth, 5G, etc.) to the torque measuring member, and is configured to convert the torque signal collected by the torque measuring member into a modulation signal, and send the modulation signal to the second coil through the first coil; the second coil is configured to send the modulation signal to the second processing circuit, and the second processing circuit is configured to convert the modulation signal into a torque signal and then send it to the controller; the second processing circuit can be electrically connected to the power supply of the mid-mounted transmission, and is configured to convert the obtained electric energy into a pulse signal, and send the pulse signal to the first coil through the second coil; the first coil is further configured to send the pulse signal to the first processing circuit, and the first processing circuit is further configured to rectify the pulse signal, so as to supply power to the first circuit module. Therefore, through the wireless communication between the first circuit module and the second circuit module, wireless power supply to the first circuit module can be realized, and the torque signal obtained by the first circuit module can be sent to the second circuit module by means of wireless communication.

[0040] In one embodiment, the first circuit module further includes an energy storage circuit electrically connected to the first processing circuit to store the electric energy output by the first processing circuit, so as to store the redundant electric energy and realize the charging of the first circuit module.

[0041] In one embodiment, the torque measuring member includes at least one group of pressure strain gauges, and each group of pressure strain gauges includes two pressure strain gauges, and the two pressure strain gauges are respectively installed on two force arms 112. For example, the sensor fixing member 11 includes two force arms 112, the torque measuring member includes one group of pressure strain gauges, and the two pressure strain gauges are respectively attached to the two force arms 112. Another example is that the sensor fixing member 11 includes four force arms 112, the torque measuring member includes two groups of pressure strain gauges, and the four pressure strain gauges are respectively attached to the four force arms 112, so as to collect two groups of torque signals to improve the detection accuracy of the torque signals.

[0042] An embodiment of the present application further provides a mid-mounted transmission, which includes the torque sensor assembly described above. Among them, the mid-mounted transmission includes two transmission shafts (such as a main shaft and a countershaft), and the torque sensor assembly can be installed on any one of the transmission shafts.

[0043] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A torque sensor assembly, characterized in that, For installation on a drive shaft, on which a circumferentially rotatable transmission member is installed; the torque sensor assembly includes a fixing member, a torque measuring member, a first circuit assembly, and a second circuit assembly; the fixing member includes a fixing portion circumferentially fixed on the drive shaft and a lever arm protruding from the fixing portion, the lever arm is connected to the transmission member, the torque measuring member is installed on the lever arm, the first circuit assembly is fixedly installed on the drive shaft, the first circuit assembly is communicatively connected to the torque measuring member and the second circuit assembly, and the second circuit assembly is sleeved on the drive shaft and is relatively rotatable with respect to the first circuit assembly.

2. The torque sensor assembly according to claim 1, wherein, The first circuit assembly includes a first annular cavity and a first circuit module installed in the first annular cavity; the second circuit assembly includes a second annular cavity and a second circuit module installed in the second annular cavity; the first annular cavity is fixedly sleeved on the drive shaft, and the second annular cavity is relatively rotatably sleeved outside the first annular cavity.

3. The torque sensor assembly according to claim 2, wherein, The second annular cavity is provided with a mounting hole for mounting the second annular cavity on the housing where the torque sensor assembly is located.

4. The torque sensor assembly according to claim 2, wherein The torque sensor assembly further includes a spline sleeve fixedly installed on the drive shaft, the transmission member is circumferentially rotatably installed on the spline sleeve, and the fixing portion is circumferentially fixed on the spline sleeve.

5. The torque sensor assembly according to claim 4, characterized in that, One side of the first annular cavity abuts against the spline sleeve.

6. The torque sensor assembly according to claim 2, characterized in that, The first circuit module includes a first processing circuit and a first coil electrically connected to each other; the second circuit module includes a second processing circuit and a second coil electrically connected to each other; the first processing circuit is communicatively connected to the torque measuring member for converting the torque signal collected by the torque measuring member into a modulation signal and sending the modulation signal to the second coil through the first coil; the second coil is used for sending the modulation signal to the second processing circuit, and the second processing circuit is used for converting the modulation signal into the torque signal and then sending it to the controller; the second processing circuit is further used for converting the obtained electric energy into a pulse signal and sending the pulse signal to the first coil through the second coil; the first coil is further used for sending the pulse signal to the first processing circuit, and the first processing circuit is further used for rectifying the pulse signal to supply power to the first circuit module.

7. The torque sensor assembly according to claim 6, wherein The first circuit module further includes an energy storage circuit electrically connected to the first processing circuit to store the electric energy output by the first processing circuit.

8. The torque sensor assembly according to claim 1, wherein, The torque measuring member includes at least one group of pressure strain gauges, and each group of pressure strain gauges includes two pressure strain gauges, and the two pressure strain gauges are respectively attached to the two lever arms.

9. The torque sensor assembly according to claim 1, wherein The transmission member is provided with an avoidance hole, and the fixing portion extends into the avoidance hole.

10. A mid-mounted transmission, characterized in that, Including the torque sensor assembly according to any one of claims 1 to 9.

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