A motor dynamometer based on a new energy vehicle and a testing method thereof

Abstract

The application discloses a motor dynamometer based on a new energy vehicle and a testing method thereof, and relates to the technical field of motor dynamometers, comprising a detection seat and a workbench arranged on a base; a motor is installed on the workbench, and the output end of the motor is connected with the detection seat; a connecting mechanism is arranged between the motor output shaft and the detection seat; the connecting mechanism comprises a connecting seat, a pair of rotating rods, a linkage mechanism and a control mechanism. The connecting mechanism is arranged, the control mechanism cooperates with the linkage mechanism to drive the multiple rotating rods to rotate synchronously, one of the rotating rods is smoothly inserted into the key groove of the motor output shaft, deep embedding is realized, the end of the other rotating rod is tightly abutted against the outer wall of the motor output shaft, and stable clamping force is formed; the device can adapt to motor output shafts of various sizes, the stability of clamping is improved, and the accuracy of dynamometer detection and overall use stability are significantly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motor dynamometers, in particular to a motor dynamometer based on a new energy vehicle and a testing method thereof. BACKGROUND

[0002] A motor is the power source of a new energy vehicle and is the core component of the power device of the new energy vehicle. The performance of the motor determines the quality of the new energy vehicle. Therefore, in order to ensure that the new energy vehicle has good quality when it is delivered, the motor is generally detected.

[0003] For example, a multifunctional motor detection device is disclosed in Chinese Patent No. CN115372823A, which includes a test bed, a performance detection box is arranged on the test bed, an adjusting mechanism is arranged on the test bed, the adjusting mechanism is used to adjust the position of the motor installed on the test bed, the connecting mechanism includes a connecting block, a clamping piece, a driving piece and a positioning piece, the connecting block is connected with the end of the shaft away from the detection shaft, a connecting groove is formed in the side wall of the connecting block, the clamping piece is installed on the connecting block, the driving piece is installed on the connecting block in the connecting groove, the positioning piece is installed on the connecting block, the driving piece is connected with the clamping piece through a linkage piece, and the positioning piece is connected with the linkage piece. The present application improves the problem of low detection efficiency of the motor in the traditional way and can improve the detection efficiency of the motor.

[0004] The above-mentioned dynamometer has the following problems with the clamping structure of the output shaft of the motor of different sizes: the existing clamping method mainly increases the clamping force in the radial direction to achieve clamping, but this method cannot effectively ensure the stability of clamping.

[0005] Secondly, the multiple arc-shaped clamping blocks currently used can usually only be applied to the clamping of the output shaft of a motor with a small range of sizes, and the universality is poor. SUMMARY

[0006] In order to overcome the above technical problems, the purpose of the present application is to provide a motor dynamometer based on a new energy vehicle and a testing method thereof, which solves the problem of poor clamping stability of the existing dynamometer in the background art.

[0007] The purpose of the present application can be achieved by the following technical solutions:

[0008] A motor dynamometer based on new energy vehicles, comprising a detection seat and a workbench arranged on a base; a motor is installed on the workbench, and an output end of the motor is connected with the detection seat; a connecting mechanism is arranged between the motor output shaft and the detection seat; the connecting mechanism comprises a connecting seat, a pair of rotating rods, a linkage mechanism and a control mechanism; wherein one end of the connecting seat is arranged on the detection seat; the pair of rotating rods are rotatably connected to the connecting seat through rotating shafts; the linkage mechanism is installed on the connecting seat and is used to push one end of the rotating rod to rotate, so as to drive the other end of the rotating rod to rotate and clamp the output shaft of the motor; and one end of one of the rotating rods is inserted into the key groove on the motor output shaft; the control mechanism is installed on the connecting seat and is used to drive the linkage mechanism to move, so as to drive the pair of rotating rods to rotate synchronously.

[0009] Preferably, the linkage mechanism comprises a sector gear, a pair of racks and a sliding block; the sector gear is rotatably connected to the connecting seat, the pair of racks are slidably connected to the connecting seat along the length direction thereof, and the two sides of the sector gear are respectively engaged with the pair of racks; the sliding block is fixedly arranged on the rack, a sliding groove adapted to the sliding block is formed on the rotating rod, and the sliding block is slidably connected in the sliding groove.

[0010] A first compression spring is arranged between the connecting seat and the rack; when the rack loses the limitation, the first compression spring is used to drive the rack to slide and reset along the length direction thereof.

[0011] Preferably, the control mechanism comprises a sliding block, a screw rod, a worm gear, a worm and a hand wheel; the sliding block is slidably connected to the connecting seat, the sector gear is rotatably connected to the sliding block, the screw rod is fixedly arranged on the sliding block, the worm gear is rotatably connected to the connecting seat, the screw rod is coaxially and threadedly connected to the worm gear, the worm is rotatably connected to the connecting seat around the axis thereof, and the worm is engaged with the worm gear; the hand wheel is arranged on the worm and is used to drive the worm to rotate.

[0012] Preferably, the worm gear and the connecting seat are rotatably connected through a bearing, an inner ring of the bearing is fixedly arranged on the connecting seat, and an outer ring of the bearing is coaxially and fixedly arranged on the worm gear.

[0013] Preferably, the rotating rod is provided with a positioning mechanism; when the rotating rod is forced to rotate and the positioning mechanism is in contact with the key groove of the motor output shaft, the positioning mechanism is forced to expand to adapt to the width of the key groove of the motor output shaft.

[0014] Preferably, the positioning mechanism comprises a first positioning block, a pair of second positioning blocks, a plurality of rotating blocks and a torsion spring; the first positioning block is rotatably connected to the rotating rod by a pin shaft, and the pin shaft axis between the first positioning block and the rotating rod is arranged in parallel with the axis of the rotating shaft; the pair of second positioning blocks are arranged on the two sides of the first positioning block; the first positioning block and the second positioning block are rotatably connected by a plurality of rotating blocks, and the torsion spring is arranged between the rotating block and the first positioning block; when the rotating rod pushes the first positioning block to abut against the output shaft of the motor, the second positioning block first abuts against the output shaft of the motor, and as the rotating force of the rotating rod increases, the first positioning block approaches the output shaft of the motor, so that the rotating block drives the pair of second positioning blocks to move away from each other to increase the contact area with the output shaft of the motor; and when the second positioning block loses the restriction, the torsion spring is used to drive the second positioning block to move back through the rotating block.

[0015] Preferably, the connecting seat is provided with a clamping mechanism; when the linkage mechanism moves, the linkage clamping mechanism moves to clamp the output shaft of the motor.

[0016] Preferably, the clamping mechanism comprises a first cylinder, a plurality of pistons, a clamping sleeve and a rubber layer; the first cylinder is arranged on the connecting seat, the piston is slidably connected in the first cylinder, and the piston and the sliding block are connected by a piston rod; a plurality of clamping sleeves are arranged on the connecting seat, the piston divides the first cylinder into two cavities, the cavity away from the clamping sleeve is communicated with the inside of the clamping sleeve through a conveying pipe, and the inner wall of the clamping sleeve is a rubber layer structure; when the gas pressure in the clamping sleeve changes, the rubber layer is allowed to swell or shrink.

[0017] Preferably, the clamping mechanism further comprises a plurality of spring sheets and connecting rods; one end of each spring sheet is rotatably connected to the clamping sleeve by a pin shaft, a plurality of connecting rods are fixedly arranged on the rubber layer, and the length direction of the plurality of connecting rods is parallel to the axis of the output shaft of the motor; the other end of each spring sheet is rotatably connected to each connecting rod.

[0018] A test method of a motor dynamometer based on a new energy vehicle, which adopts the motor dynamometer based on the new energy vehicle, and specifically comprises the following steps:

[0019] Step one, coaxial alignment: the height of the motor output shaft is adjusted by controlling the height of the workbench, so that the motor output shaft is coaxially aligned with the input end of the detection seat, and then the motor is fixed on the workbench;

[0020] Step two, alignment connection: the output shaft of the motor is aligned and inserted into the connecting mechanism along the axial direction by driving the workbench to move forward and backward, one end of the rotating rod is inserted into the key groove of the motor output shaft by the connecting mechanism, and the motor output shaft is connected and locked.

[0021] The beneficial effects of the present application are as follows:

[0022] By setting the connecting mechanism, the multiple rotating rods are driven to rotate cooperatively by the control mechanism cooperating with the linkage mechanism, so that one of the rotating rods is smoothly inserted into the key groove of the motor output shaft to achieve deep embedding, and the end of the other rotating rod tightly abuts against the outer wall of the motor output shaft to form a stable clamping force. Through this ingenious mechanical structure design, accurate positioning and stable clamping of the motor output shaft are achieved. The device can adapt to motor output shafts of various sizes and types, not only improving the stability of clamping, but also significantly improving the accuracy of dynamometer detection and overall use stability.

[0023] By setting the positioning mechanism, as the rotating rod continues to rotate, the first positioning block and the second positioning block are pushed to stably contact the outer wall of the motor output shaft, thereby increasing the contact area with the motor output shaft and ensuring accurate and stable clamping effect of the motor output shaft of different sizes and shapes, thereby providing reliable protection for the detection work of the dynamometer.

[0024] By setting the clamping mechanism, the rubber layer on the clamping sleeve is expanded under pressure and tightly abuts against the output shaft of the motor while the rotating rod is driven to rotate and clamp, thereby achieving clamping and positioning of the motor output shaft. At the same time, through the auxiliary clamping mechanism of the spring sheet and the connecting rod, not only the clamping force is improved, but also the occurrence of slipping is effectively prevented, thereby providing a strong guarantee for stable operation of the motor and accurate detection of the dynamometer. BRIEF DESCRIPTION OF DRAWINGS

[0025] The present application will be further described below with reference to the accompanying drawings.

[0026] Figure 1 is a schematic diagram of the overall three-dimensional structure of the present application;

[0027] Figure 2 is a schematic diagram of the internal structure of the connecting mechanism of the present application;

[0028] Figure 3 is a schematic diagram of the enlarged structure of area A in the present application; Figure 2

[0029] Figure 4 is a schematic diagram of the three-dimensional enlarged structure of the connecting mechanism of the present application;

[0030] Figure 5 is a schematic diagram of the three-dimensional enlarged structure of the connecting mechanism of the present application after removing part of the connecting seat;

[0031] Figure 6 is a schematic diagram of the three-dimensional enlarged structure of the connecting seat of the present application;

[0032] Figure 7 ​Is the invention clamping mechanism partial cutaway perspective enlarged structure schematic diagram;

[0033] Figure 8 Is the invention positioning mechanism perspective enlarged structure schematic diagram;

[0034] Figure 9 Is the invention Figure 8 B area enlarged structure schematic diagram;

[0035] Figure 10 Is the invention positioning mechanism perspective enlarged exploded structure schematic diagram;

[0036] Figure 11 Is the invention method flow chart.

[0037] In the figure: 1, base; 2, detection seat; 3, workbench; 4, motor; 5, connecting mechanism; 51, connecting seat; 52, rotating rod; 53, rotating shaft; 54, control mechanism; 541, sliding block; 542, screw rod; 543, worm gear; 544, worm; 545, hand wheel; 55, positioning mechanism; 551, first positioning block; 552, second positioning block; 553, rotating block; 554, torsion spring; 56, linkage mechanism; 561, sector gear; 562, rack; 563, sliding block; 564, sliding slot; 565, first compression spring; 57, clamping mechanism; 571, first cylinder; 572, piston; 573, clamping sleeve; 574, rubber layer; 575, spring piece; 576, connecting rod. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0039] Embodiment 1: Please refer to Figures 1-10 A motor dynamometer based on a new energy vehicle, such as Figures 1-3As shown, it includes a detection seat 2 and a workbench 3 arranged on the base 1; it can be understood that the detection seat 2 is prior art and will not be described in detail; a plurality of linear modules are arranged between the workbench 3 and the base 1, which can drive the workbench 3 to lift or move forward and backward, it can be understood that the linear module is prior art and is not drawn in the figure, which will not be described in detail; a motor 4 is installed on the workbench 3, and the output end of the motor 4 is connected with the detection seat 2; a connecting mechanism 5 is arranged between the output shaft of the motor 4 and the detection seat 2; the connecting mechanism 5 includes a connecting seat 51, a pair of rotating rods 52, a linkage mechanism 56 and a control mechanism 54; wherein one end of the connecting seat 51 is arranged on the detection seat 2; the pair of rotating rods 52 are rotatably connected to the connecting seat 51 through the rotating shaft 53; the linkage mechanism 56 is installed on the connecting seat 51 and is used to drive one end of the rotating rod 52 to rotate, so as to drive the other end of the rotating rod 52 to rotate and clamp the output shaft of the motor 4; and one end of one of the rotating rods 52 is inserted into the key groove on the output shaft of the motor 4; the control mechanism 54 is installed on the connecting seat 51 and is used to drive the linkage mechanism 56 to move, so as to drive the pair of rotating rods 52 to rotate synchronously.

[0040] It should be noted that, in the detection process of the dynamometer, in order to ensure that the output shaft of the motor 4 of different types and sizes can be accurately and stably connected with the detection seat 2; first, the position of the workbench 3 is accurately driven by the linear module, so that the output shaft of the motor 4 and the connecting seat 51 are coaxially aligned, and it is ensured that the center axes of the two are completely coincident; then, the workbench 3 is continuously driven by the linear module, and the motor 4 is pushed to move smoothly along the axial direction thereof until the output shaft thereof is accurately inserted into the connecting seat 51, and the preliminary alignment is completed.

[0041] Next, the key groove alignment link is entered; by rotating the connecting seat 51 or the output shaft of the motor 4, the key groove on the output shaft of the motor 4 is accurately aligned with the rotating rod 52 in the connecting seat. At this time, the control mechanism 54 is started, which drives the linkage mechanism 56 to move, and in turn drives the plurality of rotating rods 52 to rotate synchronously. In the rotating process, the linkage mechanism 56 accurately controls the action of the rotating rod 52, until one of the rotating rods 52 is smoothly inserted into the key groove of the output shaft of the motor 4, achieving deep embedding; and the end of the other rotating rod 52 is in close contact with the outer wall of the output shaft of the motor 4, forming a stable clamping force. Through this ingenious mechanical structure design, the accurate positioning and stable clamping of the output shaft of the motor 4 are realized.

[0042] The device can adapt to the output shaft of the motor of various sizes and types, which not only improves the stability of clamping, but also significantly improves the accuracy of dynamometer detection and the overall stability of use. This flexible and efficient clamping method provides a solid guarantee for the reliable operation of the dynamometer in different application scenarios.

[0043] Please refer to Figure 3 and Figures 5-6The linkage mechanism 56 includes a sector gear 561, a pair of racks 562, and a sliding block 563; the sector gear 561 is rotationally connected to the connecting seat 51, the pair of racks 562 are slidingly connected to the connecting seat 51 along the length direction thereof, and the two sides of the sector gear 561 are respectively engaged with the pair of racks 562; the sliding block 563 is fixedly arranged on the rack 562, and the rotating rod 52 is provided with a sliding groove 564 matched with the sliding block 563, and the sliding block 563 is slidingly connected in the sliding groove 564; the first compression spring 565 is arranged between the connecting seat 51 and the rack 562; when the rack 562 loses the restriction, the first compression spring 565 is used to drive the rack 562 to slide and reset along the length direction thereof.

[0044] It should be noted that through the design of the control mechanism 54 and the linkage mechanism 56, efficient clamping and accurate positioning of the output shaft of the motor 4 are achieved. The specific process is as follows: the control mechanism 54 first drives the sector gear 561 to move along the axial direction, and the movement of the sector gear 561 drives the pair of racks 562 to move synchronously through the engagement relationship; the movement of the rack 562 further drives one end of the rotating rod 52 connected thereto to rotate towards the output shaft of the motor 4 and approach. When the end of one of the rotating rods 52 is in contact with the outer wall of the output shaft of the motor 4, the rack 562 connected to the rotating rod 52 stops moving due to the reverse force.

[0045] At this time, the control mechanism 54 continues to drive the sector gear 561 to move, and since the rack 562 that has stopped moving is in engagement with the sector gear 561, the sector gear 561 will start to rotate under the constraint of the rack 562. The rotation of the sector gear 561 further drives the other rack 562 to continue to move, and the movement of the rack 562 drives the other rotating rod 52 to continue to approach the output shaft of the motor 4 until the rotating rod 52 is accurately inserted into the key groove of the output shaft of the motor 4. In this way, stable clamping of the output shaft of the motor 4 by the connecting mechanism 5 is achieved.

[0046] This clamping method is significantly different from the traditional method of fixing the output shaft of the motor only by clamping force. By inserting the rotating rod 52 into the key groove of the output shaft of the motor 4, the positioning and clamping are achieved through the geometric cooperation of the key groove, greatly improving the stability and reliability of the clamping. In addition, through the design of the linkage mechanism 56, the device can adapt to different types and sizes of output shafts of the motor 4, ensuring the coaxial alignment and clamping of the input end of the detection seat 2. This design not only improves the universality and flexibility of the device, but also significantly improves the detection accuracy and running stability of the dynamometer in different application scenarios.

[0047] Please refer to Figure 3 and Figures 5-7, the control mechanism 54 includes a sliding block 541, a screw rod 542, a worm gear 543, a worm 544 and a hand wheel 545; the sliding block 541 is slidingly connected to the connecting seat 51, the sector gear 561 is rotatably connected to the sliding block 541, the screw rod 542 is fixedly arranged on the sliding block 541, the worm gear 543 is rotatably connected to the connecting seat 51, and the screw rod 542 is coaxially and threadedly connected to the worm gear 543, the worm 544 is rotatably connected to the connecting seat 51 around its axis, and the worm 544 is engaged with the worm gear 543; the hand wheel 545 is arranged on the worm 544 and is used to drive the worm 544 to rotate; it can be understood that the hand wheel 545 and the worm 544 can be detachably connected, and after the detection seat 2 (as shown in Figure 1 ) and the output shaft of the motor 4 (as shown in Figure 1 ) are connected, the hand wheel 545 can be removed; the worm gear 543 and the connecting seat 51 are rotatably connected through a bearing, the inner ring of the bearing is fixedly arranged on the connecting seat 51, and the outer ring of the bearing is coaxially and fixedly arranged on the worm gear 543.

[0048] It should be noted that the worm gear 543 is driven to rotate synchronously. Due to the threaded connection between the worm gear 543 and the screw rod 542, the rotation of the screw rod 542 is further converted into the linear movement of the sliding block 541 along the length direction of the sliding block 541. This movement is accurate and controllable, which ensures that the sliding block 541 can stably move along the predetermined track;

[0049] With the movement of the sliding block 541, the sector gear 561 connected thereto is further driven to move in the same direction. The movement of the sector gear 561 is the key link of the movement of the linkage mechanism 56, which converts the linear movement of the sliding block 541 into the complex movement of the linkage mechanism 56 through the meshing relationship with the subsequent rack and other components. Through this ingenious mechanical transmission design, the clamping operation of the output shaft of the motor 4 is finally realized.

[0050] This manual driving mode not only is easy to operate, but also can ensure the stability and reliability of the clamping process through accurate mechanical transmission. Through the rotation of the hand wheel 545, the operator can intuitively control the clamping force and position, so as to realize the accurate clamping of different types of motor output shafts, thereby providing a solid foundation for the detection work of the dynamometer.

[0051] Please refer to Figure 4 and Figures 8-10 , the rotating rod 52 is provided with a positioning mechanism 55; when the rotating rod 52 is rotated under the action of force, the positioning mechanism 55 is connected with the motor 4 (as shown in Figure 1When the keyway of the output shaft is contacted, the positioning mechanism 55 is forced to expand to adapt to the width of the keyway of the output shaft of the motor 4; the positioning mechanism 55 includes a first positioning block 551, a pair of second positioning blocks 552, a plurality of rotating blocks 553, and a torsion spring 554; the first positioning block 551 is rotationally connected with the rotating rod 52 through a pin shaft, and the pin shaft axis between the first positioning block 551 and the rotating rod 52 is arranged in parallel with the axis of the rotating shaft 53; the pair of second positioning blocks 552 are arranged on both sides of the first positioning block 551; the first positioning block 551 and the second positioning block 552 are rotationally connected through the plurality of rotating blocks 553, and the torsion spring 554 is arranged between the rotating block 553 and the first positioning block 551; when the rotating rod 52 pushes the first positioning block 551 to contact the output shaft of the motor 4, the second positioning block 552 first contacts the output shaft of the motor 4, and as the rotating force of the rotating rod 52 increases, the first positioning block 551 approaches the output shaft of the motor 4, so that the rotating block 553 drives the pair of second positioning blocks 552 to move away from each other to increase the contact area with the output shaft of the motor 4; and when the second positioning block 552 loses the restriction, the torsion spring 554 is used to move the second positioning block 552 back to the original position through the rotating block 553.

[0052] It should be noted that the rotation of the rotating rod 52 first drives the first positioning block 551 and the second positioning block 552 connected thereto to approach the side wall of the output shaft of the motor 4. In this process, the second positioning block 552 first contacts the outer wall of the output shaft of the motor 4. As the rotating rod 52 continues to rotate, it continues to push the first positioning block 551 to approach the output shaft of the motor 4. At this time, the movement of the first positioning block 551 will drive the rotating block 553 connected thereto to rotate.

[0053] The rotation of the rotating block 553 further compresses the torsion spring 554, causing elastic deformation and storing energy. At the same time, the movement of the rotating block 553 also pushes the two first positioning blocks 551 away from each other while contacting the side wall of the output shaft of the motor 4. This process continues until the first positioning block 551 finally tightly contacts the outer wall of the output shaft of the motor 4.

[0054] At this time, the first positioning block 551 and the second positioning block 552 both form stable contact with the outer wall of the output shaft of the motor 4. Through this design, not only the contact area with the output shaft of the motor 4 is increased, but also the stability and reliability of clamping are further improved through the elastic action of the torsion spring 554. This ingenious mechanical linkage mechanism ensures that precise and stable clamping effects can be achieved in different sizes and shapes of motor output shafts, thereby providing reliable protection for the detection work of the dynamometer.

[0055] Embodiment 2: The technical solution of this embodiment is different from that of Embodiment 1 in that: please refer to Figures 4-7The connecting seat 51 is equipped with a clamping mechanism 57; when the linkage mechanism 56 moves, the linkage clamping mechanism 57 moves to clamp the motor 4 (e.g., Figure 1 (As shown) Output shaft; Clamping mechanism 57 includes a first cylinder 571, multiple pistons 572, clamping sleeves 573, and a rubber layer 574; The first cylinder 571 is disposed on the connecting seat 51, and the pistons 572 are slidably connected inside the first cylinder 571. The pistons 572 and the sliding block 541 are connected by a piston rod; Multiple clamping sleeves 573 are disposed on the connecting seat 51. The pistons 572 divide the first cylinder 571 into two cavities. The cavity away from the clamping sleeve 573 is connected to the interior of the clamping sleeve 573 through a delivery pipe, while the other cavity is connected to the outside through a through hole. The inner wall of the clamping sleeve 573 is a rubber layer 574 structure; When the air pressure inside the clamping sleeve 573 changes, the rubber layer 574 is allowed to expand or contract.

[0056] It should be noted that the movement of the sliding block 541 achieves the clamping and release of the output shaft of motor 4 through a sophisticated pneumatic mechanism, the specific process of which is as follows:

[0057] When the sliding block 541 is subjected to a positive force and moves forward along its track, it drives the piston 572 to slide in the same direction within the first cylinder 571 via the piston rod connected to it. As the piston 572 moves, the cavity within the first cylinder 571 is gradually compressed, causing the air pressure within the cylinder to rise rapidly. At this time, the air within the cylinder is compressed and transported into the clamping sleeve 573 through the delivery pipe. With the continuous injection of air, the rubber layer 574 on the clamping sleeve 573 begins to expand under pressure. The expansion of the rubber layer 574 tightly adheres to the output shaft of the motor 4, thereby achieving a stable clamping of the motor output shaft. This clamping method not only provides sufficient clamping force but also avoids damage to the motor output shaft through the elastic properties of the rubber layer; simultaneously, the sliding block 541 and the piston rod can be connected by a second compression spring to precisely control the clamping force on the output shaft of the motor 4 and prevent over-clamping.

[0058] Conversely, when the sliding block 541 is subjected to a reverse force and moves backward along the track, the piston 572 slides in the opposite direction within the first cylinder 571, thereby releasing the previously compressed air. At this time, the pressure within the first cylinder 571 decreases, and the air pressure within the delivery pipe also decreases accordingly. The rubber layer 574 on the clamping sleeve 573, having lost the support of external pressure, begins to gradually contract. The contraction of the rubber layer 574 causes the contact pressure between its inner wall and the output shaft of the motor 4 to disappear, thus loosening the clamping of the motor output shaft.

[0059] Through this ingenious pneumatic design, the system can accurately control the clamping and releasing operations according to the movement direction of the sliding block 541. This mechanism not only improves the flexibility and response speed of the clamping process, but also ensures the protection of the motor output shaft during the entire operation process, providing an efficient and reliable clamping solution for the dynamometer detection work.

[0060] Please refer to Figures 4-7 , the clamping mechanism 57 further comprises a plurality of spring plates 575 and connecting rods 576; one end of each spring plate 575 is rotatably connected to the clamping sleeve 573 through a pin shaft, and a plurality of connecting rods 576 are fixedly arranged on the rubber layer 574, and the length direction of the plurality of connecting rods 576 is parallel to the output shaft axis of the motor 4; the other end of each spring plate 575 is rotatably connected to each connecting rod 576.

[0061] It should be noted that in order to further improve the clamping force on the output shaft of the motor 4 (as shown in Figure 1 ) and ensure the reliability of clamping, the spring plates 575 and the connecting rods 576 are ingeniously matched to effectively enhance the clamping effect.

[0062] When the rubber layer 574 expands under the action of pneumatic pressure, the connecting rods 576 on the outside are pushed. The movement of the connecting rods 576 further drives the spring plates 575 connected thereto to rotate. With the rotation of the spring plates 575, one end of the spring plates 575 gradually approaches the side wall of the output shaft of the motor 4, and finally comes into close contact with the outer wall of the output shaft. At this time, the spring plates 575 exert a certain supporting force on the side wall of the output shaft of the motor 4 by virtue of their elastic properties. This supporting force cooperates with the expansion clamping force of the rubber layer 574 to form a double clamping effect, significantly improving the clamping force on the output shaft of the motor 4.

[0063] Through this design, when the motor 4 starts and drives the output shaft to rotate, the supporting force of the spring plates 575 can effectively prevent the rubber layer 574 from slipping with the output shaft of the motor 4. This slipping phenomenon is common in traditional clamping methods, especially in high-torque or high-speed working conditions, which may cause clamping failure or even damage to the motor output shaft. With the auxiliary support of the spring plates 575, the system not only enhances the stability of clamping, but also prolongs the service life of the rubber layer 574, while ensuring the reliable operation of the motor 4 under various working conditions.

[0064] In summary, through the auxiliary clamping mechanism of the spring plates 575 and the connecting rods 576, the system not only improves the clamping force, but also effectively prevents the occurrence of slipping phenomenon, providing a strong guarantee for the stable operation of the motor 4 and the accurate detection of the dynamometer.

[0065] Please refer to Figures 1-11The application discloses a test method of a motor dynamometer based on a new energy vehicle.

[0066] Step one, coaxial alignment: the height of the workbench 3 is controlled to adjust the height of the motor 4 output shaft, so that the motor 4 output shaft is coaxially aligned with the input end of the detection seat 2, and then the motor 4 is fixed on the workbench 3.

[0067] Step two, alignment connection: the workbench 3 is driven to move forward and backward, so that the output shaft of the motor 4 is aligned and inserted along the axial direction of the output shaft to the connecting mechanism 5, one end of the rotating rod 52 is inserted into the key groove of the motor 4 output shaft through the connecting mechanism 5, and the motor 4 output shaft is connected and locked.

[0068] In the description of the present application, it should be understood that the terms "up", "down", "left", "right", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation and a particular orientation configuration and operation, therefore, it cannot be understood as a limitation on the present application. In addition, "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0069] In the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0070] The above describes one embodiment of the present application in detail, but the content described is only the preferred embodiment of the present application, and cannot be considered as limiting the scope of the present application. Any equivalent changes and improvements made within the scope of the present application shall still belong to the patent coverage range of the present application.

Claims

1. A motor dynamometer for new energy vehicles, comprising a testing seat (2) and a workbench (3) mounted on a base (1); a motor (4) is mounted on the workbench (3), and the output end of the motor (4) is connected to the testing seat (2); characterized in that, A connecting mechanism (5) is provided between the output shaft of the motor (4) and the detection seat (2); the connecting mechanism (5) includes: Connecting seat (51), one end of which is disposed on the detection seat (2); A pair of rotating rods (52), the pair of rotating rods (52) are rotatably connected to the connecting seat (51) via a rotating shaft (53); Linkage mechanism (56), the linkage mechanism (56) is installed on the connecting seat (51) and is used to push one end of the rotating rod (52) to rotate so as to drive the other end of the rotating rod (52) to rotate and clamp the output shaft of the motor (4); and one end of one of the rotating rods (52) is inserted into the keyway on the output shaft of the motor (4); and a control mechanism (54), which is mounted on the connecting seat (51) and is used to drive the linkage mechanism (56) to move so as to drive a pair of rotating rods (52) to rotate synchronously; The linkage mechanism (56) includes a sector gear (561), a pair of racks (562), and a slider (563); the sector gear (561) is rotatably connected to the connecting seat (51), and the pair of racks (562) are slidably connected to the connecting seat (51) along their length direction, with both sides of the sector gear (561) meshing with the pair of racks (562); the slider (563) is fixed to the racks (562), and a groove (564) adapted to the slider (563) is provided on the rotating rod (52), with the slider (563) slidably connected in the groove (564); a first compression spring (565) is provided between the connecting seat (51) and the racks (562); when the racks (562) are unrestrained, the first compression spring (565) is used to drive the racks (562) to slide back along their length direction; The rotating rod (52) is provided with a positioning mechanism (55); when the rotating rod (52) is rotated under force, causing the positioning mechanism (55) to abut against the keyway of the output shaft of the motor (4), the positioning mechanism (55) is unfolded under force to adapt to the width of the keyway of the output shaft of the motor (4); The positioning mechanism (55) includes a first positioning block (551), a pair of second positioning blocks (552), multiple rotating blocks (553), and a torsion spring (554); the first positioning block (551) and the rotating rod (52) are rotatably connected by a pin, and the axis of the pin between the first positioning block (551) and the rotating rod (52) is parallel to the axis of the rotating shaft (53); a pair of second positioning blocks (552) are disposed on both sides of the first positioning block (551); the first positioning block (551) and the second positioning block (552) are rotatably connected by multiple rotating blocks (553), and the torsion spring (554) is disposed on the rotating block (551). 53) Between the first positioning block (551); when the rotating rod (52) pushes the first positioning block (551) to abut against the output shaft of the motor (4), the second positioning block (552) first abuts against the output shaft of the motor (4). As the rotating rod (52) rotates and the thrust increases, the first positioning block (551) moves closer to the output shaft of the motor (4), so that the rotating block (553) drives a pair of second positioning blocks (552) to move away from each other, so as to increase the contact surface with the output shaft of the motor (4); when the second positioning block (552) loses its restraint, the torsion spring (554) is used to drive the second positioning block (552) to move and reset through the rotating block (553).

2. The motor dynamometer based on new energy vehicles according to claim 1, characterized in that, The control mechanism (54) includes a sliding block (541), a screw (542), a worm gear (543), a worm (544), and a handwheel (545); the sliding block (541) is slidably connected to the connecting seat (51), the sector gear (561) is rotatably connected to the sliding block (541), the screw (542) is fixed to the sliding block (541), the worm gear (543) is rotatably connected to the connecting seat (51), and the screw (542) is coaxially threaded to the worm gear (543), the worm (544) is rotatably connected to the connecting seat (51) around its axis, and the worm (544) meshes with the worm gear (543); the handwheel (545) is disposed on the worm (544) and is used to drive the worm (544) to rotate.

3. A motor dynamometer based on new energy vehicles according to claim 2, characterized in that, The worm gear (543) and the connecting seat (51) are rotatably connected by a bearing. The inner ring of the bearing is fixed to the connecting seat (51), and the outer ring of the bearing is coaxially fixed to the worm gear (543).

4. A motor dynamometer based on new energy vehicles according to claim 2, characterized in that, The connecting seat (51) is provided with a clamping mechanism (57); when the linkage mechanism (56) moves, the linkage clamping mechanism (57) moves to clamp the output shaft of the motor (4).

5. A motor dynamometer based on new energy vehicles according to claim 4, characterized in that, The clamping mechanism (57) includes a first cylinder (571), multiple pistons (572), clamping sleeves (573), and a rubber layer (574). The first cylinder (571) is disposed on the connecting seat (51), and the pistons (572) are slidably connected inside the first cylinder (571). The pistons (572) and the sliding block (541) are connected by a piston rod. The multiple clamping sleeves (573) are disposed on the connecting seat (51). The pistons (572) divide the first cylinder (571) into two cavities. The cavity away from the clamping sleeves (573) is connected to the interior of the clamping sleeves (573) through a delivery pipe. The inner wall of the clamping sleeves (573) is a rubber layer (574) structure. When the air pressure inside the clamping sleeves (573) changes, the rubber layer (574) is allowed to expand or contract.

6. A motor dynamometer based on new energy vehicles according to claim 5, characterized in that, The clamping mechanism (57) further includes multiple spring plates (575) and connecting rods (576); one end of each spring plate (575) is rotatably connected to the clamping sleeve (573) by a pin, and the multiple connecting rods (576) are fixed to the rubber layer (574), and the length direction of the multiple connecting rods (576) is parallel to the output shaft axis of the motor (4); the other end of each spring plate (575) is rotatably connected to the connecting rod (576).

7. A testing method for a motor dynamometer based on new energy vehicles, characterized in that: The electric motor dynamometer based on any one of claims 1-6 specifically includes the following steps: Step 1, Coaxial alignment: By controlling the height of the worktable (3), adjust the height of the output shaft of the motor (4) so ​​that the output shaft of the motor (4) is coaxially aligned with the input end of the detection seat (2), and then fix the motor (4) on the worktable (3); Step 2, Alignment and Connection: By driving the worktable (3) to move back and forth, the output shaft of the motor (4) is aligned and inserted into the connection mechanism (5) along its axis. One end of the rotating rod (52) driven by the connection mechanism (5) is inserted into the keyway of the output shaft of the motor (4) to achieve connection and locking of the output shaft of the motor (4).

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