Gearbox starting torque detection device and method

Abstract

The present application relates to gearbox performance detection technical field, specifically provide gearbox starting torque detection device and method, the device includes detection assembly and spline sleeve;Detection assembly includes detection base, detection motor, torque sensor and first connecting piece;Detection motor is arranged on the detection base, and the torque input end of the torque sensor is connected with the output shaft of the detection motor;The first connecting piece is arranged on the side of the torque sensor axially away from the detection motor, and the end of the first connecting piece close to the torque sensor is connected with the torque output end of the torque sensor, and the end of the first connecting piece away from the torque sensor has the first connecting part;The axial one end of the spline sleeve has spline hole, and the spline type of the spline hole is matched with the spline type of the input shaft of the gearbox to be measured;The axial other end of the spline sleeve has the second connecting part, and the second connecting part is detachably connected with the first connecting part.The present application effectively improves compatibility, detection accuracy and detection efficiency.

Description

Technical Field

[0001] This invention relates to the field of transmission performance testing technology, and in particular to a device and method for testing transmission starting torque. Background Technology

[0002] Transmission starting torque testing is one of the key processes in transmission quality control. Before the transmission assembly leaves the factory, the assembly resistance of moving parts such as gears, bearings, and synchronizers inside the transmission is tested. Defects such as loose assembly, stuck parts, and insufficient lubrication can be determined by the starting torque value.

[0003] There are many types of gearboxes, and the spline specifications of the input shaft vary from model to model. When manually rotating the gearbox for testing, large measurement errors can easily occur due to differences in rotation speed or operating angle. Traditional testing devices are usually a single fixed spline sleeve, which requires disassembling and replacing the entire connecting shaft system when the gearbox model is changed, resulting in time-consuming disassembly and assembly and low testing efficiency. Summary of the Invention

[0004] The gearbox starting torque detection device and method provided in this invention at least solve the problems of low compatibility and difficulty in balancing accuracy and efficiency of conventional detection methods, and effectively improve compatibility, detection accuracy and detection efficiency.

[0005] In a first aspect, the present invention provides a gearbox starting torque detection device, comprising a detection component and a spline sleeve. The detection component includes a detection base, a detection motor, a torque sensor, and a first connecting member. The detection motor is disposed on the detection base, and the torque input end of the torque sensor is drivenly connected to the output shaft of the detection motor. The first connecting member is disposed on the side of the torque sensor axially away from the detection motor, and the end of the first connecting member near the torque sensor is drivenly connected to the torque output end of the torque sensor. The end of the first connecting member away from the torque sensor has a first connecting portion. One axial end of the spline sleeve has a spline hole, and the spline type of the spline hole matches the spline type of the input shaft of the gearbox under test. The other axial end of the spline sleeve has a second connecting portion, and the second connecting portion is detachably drivenly connected to the first connecting portion.

[0006] In one embodiment of the present invention, the first connecting part is configured as a polygonal shaft, and the second connecting part is configured as a polygonal hole, wherein the polygonal hole and the polygonal shaft are in clearance fit.

[0007] In one embodiment of the present invention, at least some of the edges of the polygonal shaft at one end away from the torque sensor along its own axial direction are provided with guide fillets.

[0008] In one embodiment of the present invention, the torque output end of the torque sensor has a first positioning hole and a plurality of first threaded holes. The plurality of first threaded holes are all disposed radially outside the first positioning hole and are arranged sequentially at intervals along the circumference of the first positioning hole. The end of the first connector near the torque sensor has a first positioning post and a plurality of first mounting holes. The first positioning post passes through the first positioning hole. The plurality of first mounting holes are all disposed radially outside the first positioning post. The first mounting holes are arranged in a one-to-one correspondence with the first threaded holes. A first bolt is disposed in the first mounting hole and is threadedly connected to the corresponding first threaded hole.

[0009] In one embodiment of the present invention, the torque input end of the torque sensor has a second positioning hole and a plurality of second threaded holes, all of which are arranged radially outside the second positioning hole and are spaced apart sequentially along the circumference of the second positioning hole; the detection assembly further includes a second connector, which is disposed between the torque sensor and the detection motor; the end of the second connector near the torque sensor has a second positioning post and a plurality of second mounting holes, the second positioning post passing through the second positioning hole, the plurality of second mounting holes being arranged radially outside the second positioning post, the second mounting holes corresponding one-to-one with the second threaded holes, a second bolt being disposed in the second mounting hole, and the second bolt being threadedly connected to the corresponding second threaded hole; the end of the second connector away from the torque sensor is detachably connected to the output shaft of the detection motor.

[0010] In one embodiment of the present invention, the end of the second connector away from the torque sensor has a cylindrical hole, and the wall of the cylindrical hole is provided with a first keyway; the output shaft of the detection motor passes through the cylindrical hole, and the output shaft of the detection motor is interference-fitted with the cylindrical hole; the output shaft of the detection motor is provided with a second keyway, and a transmission key is provided in the second keyway, and the transmission key is drivingly connected to the first keyway.

[0011] In one embodiment of the present invention, the detection base includes a first substrate and a second substrate; the first substrate has a motor clearance hole and a plurality of first through holes, the plurality of first through holes being disposed radially outside the motor clearance hole and spaced apart sequentially along the circumferential direction of the motor clearance hole; the second substrate is disposed above the first substrate and is connected to the first substrate; the detection motor and the torque sensor are respectively disposed on both sides of the first substrate, the detection motor abuts against the second substrate, the output shaft of the detection motor passes through the motor clearance hole, the detection motor has a plurality of second through holes, the second through holes corresponding one-to-one with the first through holes, a third bolt is disposed in the second through hole, and the third bolt is detachably connected to the corresponding first through hole.

[0012] In one embodiment of the present invention, the detection component further includes a handle, which is connected to the second substrate.

[0013] In one embodiment of the present invention, the second substrate has two third through holes, which are respectively disposed on both sides of the detection motor; the handle has two fourth through holes, which are respectively disposed in correspondence with the third through holes, and a fourth bolt is disposed in the fourth through hole, which is detachably connected to the corresponding third through hole.

[0014] Secondly, the present invention also provides a method for detecting the starting torque of a transmission, applied to the transmission starting torque detection device as described in any one of the above claims, comprising the steps of: selecting a spline sleeve according to the spline type of the input shaft of the transmission under test; wherein, one axial end of the spline sleeve has a spline hole, the spline type of the spline hole matching the spline type of the input shaft of the transmission under test; the other axial end of the spline sleeve has a second connecting portion; detachably drivingly connecting the second connecting portion of the spline sleeve to the first connecting portion of the first connecting member in the detection assembly; wherein, the detection assembly further includes a detection base, a detection motor, and a torque sensor, the detection motor being disposed on the detection base, the torque input end of the torque sensor being drivingly connected to the output shaft of the detection motor; the first connecting member being disposed on the side of the torque sensor axially away from the detection motor, the end of the first connecting member near the torque sensor being drivingly connected to the torque output end of the torque sensor, and the first connecting portion being disposed on the end of the first connecting member away from the torque sensor; starting the detection motor, and obtaining the starting torque of the transmission under test based on the torque sensor.

[0015] Compared with the prior art, the above-described technical solution of the present invention has the following advantages: The transmission starting torque detection device of this invention comprises a detection base, a detection motor, a torque sensor, and a first connecting member that work together. The detection base provides the detection reference, the detection motor provides power, and the torque sensor detects the starting torque. The first connecting member can mate with different types of spline sleeves, effectively improving compatibility with different specifications of transmissions under test. Compared to manual rotation measurement, this effectively avoids large errors in starting torque detection caused by differences in rotational speed or operating angle. Compared to traditional detection devices, this device allows for individual replacement of the spline sleeve without disassembling the entire connecting shaft system, effectively shortening disassembly and assembly time and improving detection efficiency. This device is particularly suitable for precise detection of static starting torque and no-load rotational resistance during transmission off-line factory testing and R&D trials. Attached Figure Description

[0016] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0017] Figure 1 This is a schematic diagram of the gearbox starting torque detection device in a preferred embodiment of the present invention.

[0018] Figure 2 This is one of the exploded schematic diagrams of some components of the gearbox starting torque detection device in a preferred embodiment of the present invention.

[0019] Figure 3 This is a schematic diagram of the gearbox starting torque detection device in operation in a preferred embodiment of the present invention.

[0020] Figure 4 This is the second exploded schematic diagram of some components of the gearbox starting torque detection device in a preferred embodiment of the present invention.

[0021] Figure 5 This is the third exploded schematic diagram of some components of the gearbox starting torque detection device in a preferred embodiment of the present invention.

[0022] Figure 6 This is one of the cross-sectional structural schematic diagrams of some components of the gearbox starting torque detection device in a preferred embodiment of the present invention.

[0023] Figure 7 This is the second cross-sectional structural schematic diagram of some components of the gearbox starting torque detection device in a preferred embodiment of the present invention.

[0024] Figure 8 This is the fourth exploded schematic diagram of some components of the gearbox starting torque detection device in a preferred embodiment of the present invention.

[0025] The above-mentioned figures include the following reference numerals: 01, gearbox under test; 11, detection base; 111, first base plate; 1111, motor clearance hole; 1112, first through hole; 112, second base plate; 1121, third through hole; 12, detection motor; 121, output shaft; 1211, second keyway; 1212, transmission key; 122, second through hole; 123, third bolt; 13, torque sensor; 131, first positioning hole; 132, first threaded hole; 133, second positioning hole; 134. Second threaded hole; 14. First connector; 141. First connecting part; 142. Guide fillet; 143. First positioning post; 144. First mounting hole; 145. First bolt; 15. Second connector; 151. Second positioning post; 152. Second mounting hole; 153. Second bolt; 154. Cylindrical hole; 155. First keyway; 16. Handle; 161. Fourth through hole; 162. Fourth bolt; 20. Spline sleeve; 21. Spline hole; 22. Second connecting part. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0029] Reference Figure 1 and Figure 2As shown, an embodiment of the present invention provides a gearbox starting torque detection device, including a detection component and a spline sleeve 20.

[0030] The testing component is used to detect the starting torque of the gearbox 01 under test, so that subsequent personnel can judge the corresponding assembly tightness, part jamming, and lubrication status based on the starting torque value. Specifically, the testing component includes a testing base 11, a testing motor 12, a torque sensor 13, and a first connecting member 14.

[0031] The detection base 11 serves as the reference for the entire device. When performing starting torque detection, the detection base 11 can be used for positioning, eliminating the need for time-consuming alignment of the motor and sensor, thereby shortening the detection time and improving detection efficiency. The shape of the detection base 11 can be set according to requirements, such as cube, cuboid, plate, etc.

[0032] In this embodiment of the invention, the detection motor 12 is mounted on the detection base 11. For example, the two can be fixed by welding, snap-fitting, or other methods. Preferably, the two are detachably connected to facilitate maintenance and repair by personnel.

[0033] Preferably, during testing, the output shaft 121 of the testing motor 12 is coaxially arranged with the input shaft of the gearbox 01 under test. Preferably, the testing motor 12 is a servo motor.

[0034] In this embodiment of the invention, the torque sensor 13 is used to detect the transmission connection between the output shaft 121 of the motor 12 and the input shaft of the gearbox 01 under test. It can also be used to detect the starting torque of the gearbox 01 under test.

[0035] The torque sensor 13 has two ends, namely a torque input end and a torque output end. The torque input end of the torque sensor 13 is connected to the output shaft 121 of the detection motor 12 so that it rotates synchronously with the output shaft 121 of the detection motor 12.

[0036] For example, the two can be fixed together by welding, snap-fitting, or other methods. Preferably, the two are designed to be detachable to facilitate maintenance and repair by personnel.

[0037] In this embodiment of the invention, the first connector 14 is an intermediate component between the torque sensor 13 and the spline sleeve 20, and the first connector 14 is disposed on the side of the torque sensor 13 that is axially away from the detection motor 12.

[0038] The end of the first connector 14 near the torque sensor 13 is connected to the torque output end of the torque sensor 13. For example, the two can be fixed by welding, snap-fitting, or other methods. Preferably, the two are configured as a detachable connection to facilitate maintenance and repair by personnel.

[0039] The end of the first connector 14 furthest from the torque sensor 13 has a first connecting portion 141, which is used for transmission connection with the spline sleeve 20. The first connecting portion 141 can be a shaft-shaped structure or a hole-shaped structure.

[0040] The spline sleeve 20 is used to mate with the gearbox 01 under test. Specifically, one axial end of the spline sleeve 20 has a spline hole 21, and the other axial end of the spline sleeve 20 has a second connecting part 22.

[0041] The spline hole 21 of the spline sleeve 20 can be connected to the input shaft of the gearbox 01 under test to achieve transmission. In this embodiment of the invention, multiple different models of spline sleeves 20 can be prepared, with the spline type of the spline hole 21 on one type of spline sleeve 20 matching the spline type of the input shaft of one type of gearbox 01 under test. Thus, when facing different models of gearbox 01 under test, only the spline sleeve 20 with the matching spline type needs to be selected to achieve adaptation.

[0042] The second connecting portion 22 of the spline sleeve 20 can mate with the first connecting portion 141 of the first connecting member 14 to transmit power to the detection motor 12. In this embodiment of the invention, the second connecting portion 22 and the first connecting portion 141 are detachably connected. For example, they can be detached by means of snap-fit, threaded connection, etc.

[0043] Thus, when dealing with a new model of the gearbox 01 under test, only the first connecting part 141 and the second connecting part 22 need to be separated to remove the current spline sleeve 20 and replace it with a matching spline sleeve 20, without disassembling the torque sensor 13 and the detection motor 12. Based on this, it can effectively accommodate different models of the gearbox 01 under test, improving device compatibility, saving changeover time, and increasing testing efficiency.

[0044] The torque sensor 13 is connected in series in the power path between the detection motor 12 and the gearbox 01 under test. When the output shaft 121 of the detection motor 12 rotates, the torsion-bearing component inside the torque sensor 13 will undergo torsional deformation. Correspondingly, the detection component inside the torque sensor 13 will convert the torsional deformation of the torsion-bearing component into an output electrical signal.

[0045] In this embodiment of the invention, the model of the torque sensor 13 can be set according to actual needs. For example, the detection component can be set to strain gauge type, magnetoelectric type, optical type, etc., without limitation, as long as the detection range of the torque sensor 13 can cover the starting torque of the gearbox 01 under test. For example, if the starting torque of a certain gearbox 01 under test is not greater than 3 N·m, then a torque sensor 13 with a detection range greater than 3 N·m can be selected.

[0046] During testing, firstly, based on the spline type of the input shaft of the gearbox 01 under test, a spline sleeve 20 matching the spline type of the spline hole 21 is selected. Then, the spline sleeve 20 is mounted on the first connecting member 14 via the first connecting part 141 and the second connecting part 22. Next, refer to... Figure 3 As shown, the spline hole 21 of the spline sleeve 20 is aligned with the input shaft of the gearbox 01 under test and mated to achieve the meshing of the inner and outer splines.

[0047] After the testing base 11 is positioned, the testing motor 12 can be started. The output shaft 121 of the testing motor 12 rotates at a pre-set speed, transmitting power to the input shaft of the gearbox 01 under test via the torque sensor 13, the first connector 14, and the spline sleeve 20. During this process, the torque sensor 13 collects relevant data from the gearbox 01 under test in real time, including static starting torque and no-load rotational resistance data, to achieve testing. Finally, the spline sleeve 20 is removed, and a similar operation is performed on the next gearbox 01 under test to achieve batch testing.

[0048] In summary, the gearbox starting torque detection device of the present invention comprises a detection base 11, a detection motor 12, a torque sensor 13, and a first connecting member 14 that work together. The detection base 11 provides the detection reference, the detection motor 12 provides the power, and the torque sensor 13 detects the starting torque. The first connecting member 14 can mate with different models of spline sleeves 20, effectively improving the adaptability to different specifications of the gearbox 01 under test. Compared with manual rotation measurement, this device effectively avoids the problem of large errors in starting torque detection caused by different rotation speeds or operating angles. Compared with traditional detection devices, this device allows for the replacement of the spline sleeve 20 individually without disassembling the entire connecting shaft system, effectively shortening the disassembly and assembly time and improving detection efficiency. This device is particularly suitable for the precise detection of static starting torque and no-load rotational resistance during gearbox off-line factory testing and R&D trials.

[0049] Reference Figure 3 , Figure 5 and Figure 6 As shown, in some embodiments of the gearbox starting torque detection device of the present invention, the first connecting part 141 is configured as a polygonal shaft and the second connecting part 22 is configured as a polygonal hole.

[0050] In this context, a polygonal axis refers to an axis whose cross-sectional shape is polygonal, with at least three sides; that is, the polygon can be triangular, quadrilateral, pentagonal, etc. Similarly, a polygonal hole refers to a hole whose cross-sectional shape is polygonal, which can be triangular, quadrilateral, pentagonal, etc., matching the polygonal axis.

[0051] The polygonal hole and the polygonal shaft are clearance-fitted, allowing the polygonal shaft to be inserted into the polygonal hole. Compared to setting a shaft structure on the spline sleeve 20, setting a hole structure for it effectively reduces machining difficulty and cost.

[0052] Compared to bolt locking and snap-fit ​​methods, the hole-shaft plug-in structure for transmission is very convenient. The spline sleeve 20 can be replaced simply by plugging and unplugging, effectively saving assembly and disassembly time and improving overall efficiency. Actual testing shows that single changeover time can be reduced from fifteen minutes to less than two minutes, making it particularly suitable for batch testing of various types of gearboxes.

[0053] Preferably, in this embodiment of the invention, the polygonal shaft is a regular quadrilateral shaft, that is, it can be set as a cuboid or cuboid-like structure. Correspondingly, the polygonal hole is a regular quadrilateral hole, that is, it can be set as a square hole or a square-like hole. In this way, it is convenient for the two to cooperate and transmit power to realize torque detection, and it is also convenient for manufacturing and processing, reducing production costs.

[0054] Preferably, the central axis of the polygonal shaft is coaxial with the central axis of the output shaft 121 of the detection motor 12 and the central axis of the gearbox 01 under test. The central axis of the polygonal hole is coaxial with the central axis of the output shaft 121 of the detection motor 12 and the central axis of the gearbox 01 under test.

[0055] Furthermore, refer to Figure 4 and Figure 6 As shown, in some embodiments of the gearbox starting torque detection device of the present invention, at least some of the edges of the polygonal shaft away from the torque sensor 13 along its own axial direction are provided with guide structures.

[0056] Taking a regular quadrilateral shaft as an example, the cuboid structure has a total of twelve edges. Four edges are located at the end away from the torque sensor 13 along the axial direction. At least one of these four edges has a guide structure.

[0057] The guide structure facilitates the alignment of the polygonal shaft and allows for quick insertion into the polygonal hole, improving installation efficiency. Preferably, the guide structure is configured with guide fillet 142, which is more rounded than a chamfered structure, preventing injury to workers during operation. Preferably, multiple edges of the polygonal shaft at the end away from the torque sensor 13 are provided with guide fillet 142.

[0058] Reference Figure 4 and Figure 6 As shown, in some embodiments of the gearbox starting torque detection device of the present invention, the torque sensor 13 and the first connector 14 are detachably connected.

[0059] Preferably, the torque output end of the torque sensor 13 has a first positioning hole 131 and a plurality of first threaded holes 132. The plurality of first threaded holes 132 are all disposed radially outside the first positioning hole 131, and are arranged sequentially at intervals along the circumference of the first positioning hole 131.

[0060] The number of first threaded holes 132 can be set according to actual needs, such as two, three, four, five, etc. Preferably, in this embodiment of the invention, the number of first threaded holes 132 is set to six, of which three are grouped together and respectively arranged on both radial sides of the first positioning hole 131. The first threaded holes 132 in the same group are evenly spaced along the circumference of the first positioning hole 131.

[0061] Correspondingly, the end of the first connector 14 near the torque sensor 13 has a first positioning post 143 and a plurality of first mounting holes 144. The first positioning post 143 passes through the first positioning hole 131, and the two are clearance-fitted. When assembling the first connector 14 with the torque sensor 13, the first positioning post 143 can be inserted into the first mounting hole 144 for preliminary fixation, which facilitates installation and improves assembly efficiency. Preferably, the first positioning post 143 is coaxially arranged with the first connecting part 141.

[0062] Multiple first mounting holes 144 are provided on the radial outer side of the first positioning post 143, and multiple first mounting holes 144 are arranged sequentially at intervals along the circumference of the first positioning post 143.

[0063] The number of first mounting holes 144 can be set according to actual needs, such as two, three, four, five, etc. Preferably, in this embodiment of the invention, the number of first mounting holes 144 is set to six, with three in a group, respectively arranged on both radial sides of the first positioning post 143. The first mounting holes 144 in the same group are evenly spaced along the circumference of the first positioning post 143. Preferably, the first mounting holes 144 are arranged in a one-to-one correspondence with the first threaded holes 132.

[0064] A first bolt 145 is provided in the first mounting hole 144, and the first bolt 145 is threadedly connected to the corresponding first threaded hole 132 to achieve locking. In this way, the first bolt 145 can be used for transmission, which facilitates the subsequent detection of starting torque.

[0065] Reference Figure 5 and Figure 7As shown, in some embodiments of the gearbox starting torque detection device of the present invention, the torque sensor 13 and the detection motor 12 are detachably connected.

[0066] Preferably, the torque input end of the torque sensor 13 has a second positioning hole 133 and a plurality of second threaded holes 134. Preferably, the second positioning hole 133 is coaxially arranged with the first positioning hole 131.

[0067] Multiple second threaded holes 134 are provided on the radial outer side of the second positioning hole 133, and are arranged sequentially at intervals along the circumference of the second positioning hole 133.

[0068] The number of second threaded holes 134 can be set according to actual needs, such as two, three, four, five, etc. Preferably, in this embodiment of the invention, the number of second threaded holes 134 is set to six, of which three are grouped together and respectively arranged on both radial sides of the second positioning hole 133. The second threaded holes 134 in the same group are evenly spaced along the circumference of the second positioning hole 133.

[0069] Accordingly, the detection assembly also includes a second connector 15, which is disposed between the torque sensor 13 and the detection motor 12. The end of the second connector 15 closest to the torque sensor 13 has a second positioning post 151 and a plurality of second mounting holes 152. Preferably, the second positioning post 151 is coaxially arranged with the output shaft 121 of the detection motor 12.

[0070] The second positioning pin 151 passes through the second positioning hole 133, and the two are fitted with a clearance fit. When assembling the second connecting piece 15 with the torque sensor 13, the second positioning pin 151 can be inserted into the second mounting hole 152 to achieve preliminary fixation, which facilitates installation and improves assembly efficiency.

[0071] Multiple second mounting holes 152 are provided on the radial outer side of the second positioning post 151, and are arranged sequentially at intervals along the circumference of the second positioning post 151.

[0072] The number of second mounting holes 152 can be set according to actual needs, such as two, three, four, five, etc. Preferably, in this embodiment of the invention, the number of second mounting holes 152 is set to six, with three in a group, respectively arranged on both radial sides of the second positioning post 151. The second mounting holes 152 in the same group are evenly spaced along the circumference of the second positioning post 151. Preferably, the second mounting holes 152 are arranged in a one-to-one correspondence with the second threaded holes 134.

[0073] A second bolt 153 is provided in the second mounting hole 152, and the second bolt 153 is threadedly connected to the corresponding second threaded hole 134 to achieve locking. In this way, the transmission can be achieved through the second bolt 153, which facilitates the subsequent detection of starting torque.

[0074] The second connector 15 can be directly and fixedly connected to the output shaft 121 of the detection motor 12. Preferably, the end of the second connector 15 away from the torque sensor 13 is detachably connected to the output shaft 121 of the detection motor 12.

[0075] When the torque sensor 13 and the first connector 14 are configured to be detachably connected, and the torque sensor 13 and the detection motor 12 are configured to be detachably connected, the second adapter block on the detection motor 12 side, the torque sensor 13 and the first connector block on the gearbox 01 side under test form a layered transmission structure. This can isolate the influence of the assembly error of the detection motor 12 on the coaxiality of the torque sensor 13, reduce the radial additional bending moment, and improve the detection accuracy of small starting torque.

[0076] At the same time, the torque sensor 13 can be disassembled and maintained independently. The calibrated torque sensor 13 can be replaced separately without removing the detection motor 12, reducing the maintenance cost of the device, halving the disassembly and maintenance process, and shortening the downtime for maintenance.

[0077] Furthermore, refer to Figure 5 and Figure 7 As shown, in some embodiments of the gearbox starting torque detection device of the present invention, the end of the second connector 15 away from the torque sensor 13 has a cylindrical hole 154, and the cross-sectional shape of the cylindrical hole 154 is circular. The wall of the cylindrical hole 154 is provided with a first keyway 155, preferably, the length extension direction of the first keyway 155 is parallel to the axial direction of the cylindrical hole 154.

[0078] The cylindrical hole 154 can be obtained by directly drilling a hole in the second connector 15, or the column structure can be first processed on the second connector 15, and then the cylindrical hole 154 can be obtained by drilling a hole in the column structure. Preferably, the cylindrical hole 154 is coaxially arranged with the second positioning post 151.

[0079] The output shaft 121 of the detection motor 12 passes through the cylindrical hole 154, and the output shaft 121 of the detection motor 12 is interference-fitted with the cylindrical hole 154. The interference fit relies on the elastic deformation of the two surfaces, the side wall of the shaft and the inner wall of the hole, to generate a normal force, and then relies on friction to transmit the load.

[0080] By setting the output shaft 121 of the detection motor 12 and the cylindrical hole 154 of the second connector 15 as an interference fit, centering preload and axial fixation can be achieved, improving the overall connection rigidity and extending the overall service life. The interference fit between the hole and shaft can be achieved through thermal fitting or direct press-in cold fitting.

[0081] The output shaft 121 of the detection motor 12 is provided with a second keyway 1211. Preferably, the length extension direction of the second keyway 1211 is parallel to the axial direction of the output shaft 121 of the detection motor 12. A transmission key 1212 is provided in the second keyway 1211, and the transmission key 1212 is drivingly connected to the first keyway 155 and the second keyway 1211. Preferably, the transmission key 1212 is a flat key.

[0082] In this way, torque can be transmitted through the transmission key 1212, and the relative rotation between the output shaft 121 of the detection motor 12 and the second connector 15 can be further restricted.

[0083] By simultaneously setting both hole-shaft clearance fit and key transmission, transmission backlash and additional radial bending moment caused by motor assembly deviations can be eliminated, ensuring torque transmission without lag, guaranteeing a true and distortion-free low-speed starting torque signal, and improving detection accuracy. In this way, subtle defects such as minor jamming and excessively tight assembly in the gearbox under test (01) can be accurately identified.

[0084] Reference Figure 8 As shown, in some embodiments of the gearbox starting torque detection device of the present invention, the detection base 11 includes a first base plate 111 and a second base plate 112.

[0085] The first substrate 111 has a motor clearance hole 1111 and a plurality of first through holes 1112. The motor clearance hole 1111 is used to pass through the output shaft 121 of the detection motor 12. The plurality of first through holes 1112 are all disposed on the radial outer side of the motor clearance hole 1111, and the plurality of first through holes 1112 are arranged sequentially at intervals along the circumference of the motor clearance hole 1111.

[0086] The number of first through holes 1112 can be set according to actual needs, such as two, three, four, five, etc. Preferably, in this embodiment of the invention, the number of first through holes 1112 is set to four, and the four first through holes 1112 are evenly spaced along the circumference of the motor clearance hole 1111.

[0087] Along the radial direction of the motor clearance hole 1111, the second substrate 112 is disposed on one side of the first substrate 111, and the second substrate 112 is connected to the first substrate 111. Preferably, the second substrate 112 is disposed above the first substrate 111, and the first substrate 111 and the second substrate 112 are integrally formed.

[0088] Along the axial direction of the motor clearance hole 1111, the detection motor 12 and the torque sensor 13 are respectively disposed on both sides of the first substrate 111. The detection motor 12 abuts against the second substrate 112 to achieve positioning. The output shaft 121 of the detection motor 12 passes through the motor clearance hole 1111 to dock with the torque sensor 13 on the other side of the first substrate 111.

[0089] The detection motor 12 has multiple second through holes 122, which are all located on the radial outer side of the output shaft 121 of the detection motor 12. Along the circumference of the output shaft 121 of the detection motor 12, the multiple second through holes 122 are arranged at intervals.

[0090] The number of second through holes 122 can be set according to actual needs, such as two, three, four, five, etc. Preferably, in this embodiment of the invention, the number of second through holes 122 is set to four, and the four second through holes 122 are evenly spaced along the circumference of the output shaft 121 of the detection motor 12.

[0091] Preferably, the second through hole 122 corresponds one-to-one with the first through hole 1112, and a third bolt 123 is provided in the second through hole 122, which is detachably connected to the corresponding first through hole 1112. For example, an internal thread can be provided in the first through hole 1112 to achieve a threaded connection with the external thread of the third bolt 123. Alternatively, the tail of the third bolt 123 can pass through the first through hole 1112, and a nut can be provided on the other side of the first substrate 111 for threaded connection to achieve locking.

[0092] This structure effectively secures the detection motor 12 and allows for easy disassembly for maintenance when needed. During testing, a detection reference point can be used as a standard, requiring only one positioning step and eliminating the need for multiple alignments, thus improving testing efficiency.

[0093] Reference Figure 8 As shown, in some embodiments of the gearbox starting torque detection device of the present invention, the detection component further includes a handle 16, which is connected to the second base plate 112.

[0094] By setting handle 16, the operator can directly lift the device through handle 16 without lifting the motor and sensor, which facilitates the docking of spline sleeve 20 with the input shaft of the gearbox 01 under test, reduces the difficulty of docking for a single person, avoids accidental bumps and damage to the spline structure during docking, and reduces the scrap rate of workpieces.

[0095] Preferably, the second substrate 112 has two third through holes 1121, which are respectively disposed on both sides of the detection motor 12. Correspondingly, the handle 16 has two fourth through holes 161, which are arranged one-to-one with the third through holes 1121. A fourth bolt 162 is disposed in the fourth through hole 161, and the fourth bolt 162 is detachably connected to the corresponding third through hole 1121.

[0096] For example, an internal thread can be provided in the third through hole 1121 to achieve a threaded connection with the external thread of the fourth bolt 162. Alternatively, the tail of the fourth bolt 162 can be passed through the third through hole 1121, and a nut can be provided on the other side of the second base plate 112 to achieve a threaded connection with it, thereby achieving a locking effect.

[0097] Preferably, in some embodiments, a positioning structure can be provided on the detection base 11. The operator can use the positioning structure to connect the detection base 11 with the hole structure on the gearbox 01 under test, so as to position and install the device on the gearbox 01 under test.

[0098] On the other hand, embodiments of the present invention also provide a transmission starting torque detection device, including the transmission starting torque detection device described in any of the above embodiments.

[0099] The gearbox starting torque detection device of the present invention includes the gearbox starting torque detection device described in the above embodiments, and therefore has all the beneficial effects of the gearbox starting torque detection device, which will not be repeated here.

[0100] Preferably, in some embodiments, a display can be provided and electrically connected to the torque sensor 13 to display the data measured by the torque sensor 13 in real time, so that the staff can understand the current status of the gearbox.

[0101] Preferably, in some embodiments, a memory can be provided and electrically connected to the torque sensor 13 to record the data measured by the torque sensor 13 for subsequent traceability.

[0102] On the other hand, embodiments of the present invention also provide a method for detecting transmission starting torque, applied to the transmission starting torque detection device described in any of the above embodiments. The transmission starting torque detection method includes steps S10, S20, and S30.

[0103] Step S10: Select spline sleeve 20 according to the spline model of the input shaft of the gearbox 01 under test.

[0104] The spline sleeve 20 has a spline hole 21 at one axial end, and the spline type of the spline hole 21 matches the spline type of the input shaft of the gearbox 01 under test. The other axial end of the spline sleeve 20 has a second connecting part 22.

[0105] In step S20, the second connecting part 22 of the spline sleeve 20 is detachably connected to the first connecting part 141 of the first connecting member 14 in the detection assembly.

[0106] The detection assembly includes a detection base 11, a detection motor 12, and a torque sensor 13. The detection motor 12 is mounted on the detection base 11, and the torque input end of the torque sensor 13 is drive-connected to the output shaft 121 of the detection motor 12. A first connecting member 14 is located on the side of the torque sensor 13 axially away from the detection motor 12. The end of the first connecting member 14 near the torque sensor 13 is drive-connected to the torque output end of the torque sensor 13, and a first connecting part 141 is located at the end of the first connecting member 14 away from the torque sensor 13.

[0107] Step S30: Start the detection motor 12 and obtain the starting torque of the transmission 01 under test based on the torque sensor 13.

[0108] Working Principle: First, based on the spline model of the input shaft of the gearbox 01 under test, a spline sleeve 20 matching the spline model of the spline hole 21 is selected. The square hole of the spline sleeve 20 is fitted onto the square shaft of the first connector 14 to achieve mating. Second, the operator lifts the device using handle 16, aligning the spline hole 21 with the output shaft 121 of the gearbox 01 under test, achieving meshing of the inner and outer splines. After positioning the test base 11, the test motor 12 can be started. The output shaft 121 of the test motor 12 rotates uniformly at a pre-set speed, thereby transmitting power to the input shaft of the gearbox 01 under test through the second connector 15, torque sensor 13, first connector 14, and spline sleeve 20. During this process, the torque sensor 13 collects relevant data of the gearbox 01 under test in real time, including static starting torque, no-load rotational resistance data, etc., to achieve detection. Finally, the operator removes the spline sleeve 20 using handle 16, completing the current test, and can perform similar operations on the next gearbox 01 under test to achieve batch testing.

[0109] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0110] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0111] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A gearbox starting torque detection device, characterized in that, include: The detection assembly includes a detection base, a detection motor, a torque sensor, and a first connector; The detection motor is mounted on the detection base, and the torque input end of the torque sensor is driven to the output shaft of the detection motor. The first connecting member is located on the side of the torque sensor axially away from the detection motor. The end of the first connecting member close to the torque sensor is driven to the torque output end of the torque sensor, and the end of the first connecting member away from the torque sensor has a first connecting portion. The spline sleeve has a spline hole at one axial end, and the spline type of the spline hole matches the spline type of the input shaft of the gearbox under test; the other axial end of the spline sleeve has a second connecting part, and the second connecting part is detachably connected to the first connecting part in a transmission manner.

2. The gearbox starting torque detection device according to claim 1, characterized in that: The first connecting part is configured as a polygonal shaft, and the second connecting part is configured as a polygonal hole, wherein the polygonal hole and the polygonal shaft are in clearance fit.

3. The gearbox starting torque detection device according to claim 2, characterized in that: At least some of the edges of the polygonal shaft located away from the torque sensor along its own axial direction are provided with guide fillets.

4. The gearbox starting torque detection device according to claim 1, characterized in that: The torque sensor has a first positioning hole and multiple first threaded holes at its torque output end. The multiple first threaded holes are all located on the radial outer side of the first positioning hole and are arranged at intervals along the circumference of the first positioning hole. The first connector has a first positioning post and a plurality of first mounting holes at the end near the torque sensor. The first positioning post passes through the first positioning hole, and the plurality of first mounting holes are all arranged on the radial outer side of the first positioning post. The first mounting holes are arranged one-to-one with the first threaded holes. A first bolt is provided in the first mounting hole, and the first bolt is threadedly connected to the corresponding first threaded hole.

5. The gearbox starting torque detection device according to claim 1 or 4, characterized in that: The torque sensor has a second positioning hole and multiple second threaded holes at its torque input end. The multiple second threaded holes are all located on the radial outer side of the second positioning hole and are arranged at intervals along the circumference of the second positioning hole. The detection assembly further includes a second connector disposed between the torque sensor and the detection motor. The end of the second connector near the torque sensor has a second positioning post and multiple second mounting holes. The second positioning post passes through the second positioning hole, and the multiple second mounting holes are all located radially outside the second positioning post. Each second mounting hole corresponds to a second threaded hole, and a second bolt is installed within the second mounting hole, threadedly connected to the corresponding second threaded hole. The end of the second connector away from the torque sensor is detachably connected to the output shaft of the detection motor.

6. The gearbox starting torque detection device according to claim 5, characterized in that: The second connector has a cylindrical hole at the end away from the torque sensor, and the wall of the cylindrical hole is provided with a first keyway; The output shaft of the detection motor passes through the cylindrical hole and is interference-fitted with the cylindrical hole; the output shaft of the detection motor is provided with a second keyway, and a transmission key is provided in the second keyway, which is drivingly connected to the first keyway.

7. The gearbox starting torque detection device according to claim 1, characterized in that: The detection base includes a first substrate and a second substrate; the first substrate has a motor clearance hole and a plurality of first through holes, the plurality of first through holes being disposed radially outside the motor clearance hole, and the plurality of first through holes being sequentially spaced apart along the circumferential direction of the motor clearance hole; the second substrate is disposed above the first substrate and is connected to the first substrate; The detection motor and the torque sensor are respectively disposed on both sides of the first substrate. The detection motor abuts against the second substrate. The output shaft of the detection motor passes through the motor clearance hole. The detection motor has multiple second through holes, which correspond one-to-one with the first through holes. A third bolt is disposed in the second through hole, and the third bolt is detachably connected to the corresponding first through hole.

8. The gearbox starting torque detection device according to claim 7, characterized in that: The detection component also includes a handle, which is connected to the second substrate.

9. The gearbox starting torque detection device according to claim 8, characterized in that: The second substrate has two third through holes, which are respectively disposed on both sides of the detection motor; The handle has two fourth through holes, which correspond one-to-one with the third through holes. A fourth bolt is installed in each of the fourth through holes, and the fourth bolt is detachably connected to the corresponding third through hole.

10. A method for detecting the starting torque of a transmission, applied to the transmission starting torque detection device as described in any one of claims 1 to 9, characterized in that, Including the following steps: Select a spline sleeve according to the spline type of the input shaft of the gearbox under test; wherein, one axial end of the spline sleeve has a spline hole, the spline type of the spline hole matches the spline type of the input shaft of the gearbox under test; the other axial end of the spline sleeve has a second connecting part; The second connecting part of the spline sleeve is detachably connected to the first connecting part of the first connecting member in the detection assembly; wherein, the detection assembly further includes a detection base, a detection motor and a torque sensor, the detection motor is disposed on the detection base, and the torque input end of the torque sensor is connected to the output shaft of the detection motor; the first connecting member is disposed on the side of the torque sensor axially away from the detection motor, the end of the first connecting member near the torque sensor is connected to the torque output end of the torque sensor, and the first connecting part is disposed on the end of the first connecting member away from the torque sensor; The detection motor is started, and the starting torque of the gearbox under test is obtained based on the torque sensor.

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