Motor dynamometer based on new energy vehicle and test method thereof

Abstract

The invention discloses a motor dynamometer based on a new energy vehicle and a test method thereof, and relates to the technical field of motor dynamometers, and the motor dynamometer comprises a detection seat and a workbench which are disposed on a pedestal. A motor is mounted on the workbench, and the output end of the motor is connected with the detection seat; a connecting mechanism is arranged between the output shaft of the motor and the detection seat; the connecting mechanism comprises a connecting base, a pair of rotating rods, a linkage mechanism and a control mechanism. The connecting mechanism is arranged, and the control mechanism is matched with the linkage mechanism to drive the multiple rotating rods to rotate cooperatively, so that one rotating rod is smoothly inserted into the key groove of the output shaft of the motor, and deep embedding is achieved; the end part of the other rotating rod is tightly propped against the outer wall of the output shaft of the motor to form stable clamping force; the device can adapt to motor output shafts of various sizes and types, the clamping stability is improved, and the detection accuracy and the overall use stability of the dynamometer are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motor dynamometers, and in particular to a motor dynamometer based on new energy vehicles and a testing method thereof. Background Art

[0002] The motor is the power source and core component of new energy vehicles' powertrains. The motor's performance determines the quality of the new energy vehicle. Therefore, to ensure high quality when new energy vehicles leave the factory, motor testing is typically performed.

[0003] For example, a Chinese patent with publication number CN115372823A discloses a multifunctional motor detection device, including a test bed, a performance detection box provided on the test bed, an adjustment mechanism provided on the test bed, the adjustment mechanism being used to adjust the position of the motor installed on the test bed, the connecting mechanism including a connecting block, a clamping member, a driving member and a positioning member, the connecting block being connected to the end of the coupling away from the detection shaft, a connecting groove being provided on the side wall of the connecting block, the clamping member being installed on the connecting block, the driving member being installed on the connecting block and located in the connecting groove, the positioning member being installed on the connecting block, the driving member being connected to the clamping member through a linkage member, and the positioning member being connected to the linkage member. This application improves the problem of low detection efficiency of the motor in the traditional method, and can achieve the effect of improving the detection efficiency of the motor.

[0004] The clamping structure of the above-mentioned dynamometer for motor output shafts of different sizes has the following problems: the existing clamping method mainly achieves clamping by increasing the clamping force in the radial direction, but this method cannot effectively ensure the stability of the clamping; Secondly, the multiple arc-shaped clamping blocks currently used are usually only suitable for clamping motor output shafts of a small range of sizes and have poor versatility. Summary of the Invention

[0005] In order to overcome the above technical problems, the purpose of the present invention is to provide a motor dynamometer based on new energy vehicles and a testing method thereof, so as to solve the problem of poor clamping stability of the existing dynamometer mentioned in the above background technology.

[0006] The purpose of the present invention can be achieved through the following technical solutions: A motor dynamometer based on new energy vehicles includes 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 to the detection seat; a connecting mechanism is arranged between the motor output shaft and the detection seat; the connecting mechanism includes: 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; a pair of the rotating rods are rotatably connected to the connecting seat through a rotating shaft; 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 keyway 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 a pair of rotating rods to rotate synchronously.

[0007] Preferably, the linkage mechanism includes a sector gear, a pair of racks, and a slider; the sector gear is rotatably connected to the connecting seat, the pair of racks are slidably connected to the connecting seat along their length, and both sides of the sector gear are respectively engaged with the pair of racks; the slider is fixed to the rack, and a sliding groove adapted to the slider is formed on the rotating rod, and the slider is slidably connected in the sliding groove; A first compression spring is provided between the connecting seat and the rack; when the rack loses its restriction, the first compression spring is used to drive the rack to slide and reset along its length direction.

[0008] Preferably, the control mechanism includes a sliding block, a screw, a worm gear, a worm and a handwheel; the sliding block is slidably connected to the connecting seat, the sector gear is rotatably connected to the sliding block, the screw is fixed to the sliding block, the worm gear is rotatably connected to the connecting seat, and the screw is coaxially threaded to the worm gear, the worm is rotatably connected to the connecting seat around its axis, and the worm is engaged with the worm wheel; the handwheel is arranged on the worm and is used to drive the worm to rotate.

[0009] Preferably, the worm wheel and the connecting seat are rotatably connected via a bearing, the inner ring of the bearing is fixed to the connecting seat, and the outer ring of the bearing is coaxially fixed to the worm wheel.

[0010] Preferably, a positioning mechanism is provided on the rotating rod; when the rotating rod is rotated by force so that the positioning mechanism comes into conflict with the keyway of the motor output shaft, the positioning mechanism is forced to expand to adapt to the width of the keyway of the motor output shaft.

[0011] Preferably, the positioning mechanism includes a first positioning block, a pair of second positioning blocks, a plurality of rotating blocks and a torsion spring; the first positioning block and the rotating rod are rotatably connected by a pin, and the axis of the pin between the first positioning block and the rotating rod is arranged parallel to the axis of the rotating shaft; a pair of second positioning blocks are arranged on both 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 contact the output shaft of the motor, the second positioning block first contacts the output shaft of the motor. As the rotating thrust 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 away from each other to increase the contact area with the output shaft of the motor; and when the second positioning block loses its restriction, the torsion spring is used to drive the second positioning block to move and reset through the rotating block.

[0012] Preferably, a clamping mechanism is provided on the connecting seat; when the linkage mechanism moves, the linkage clamping mechanism moves to clamp the output shaft of the motor.

[0013] Preferably, the clamping mechanism includes a first cylinder, multiple pistons, a clamping sleeve and a rubber layer; the first cylinder is arranged on a connecting seat, the piston is slidably connected in the first cylinder, and the piston and the sliding block are connected by a piston rod; multiple 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 connected to the interior of the clamping sleeve through a conveying pipe, and the inner wall of the clamping sleeve is a rubber layer structure; when the air pressure in the clamping sleeve changes, the rubber layer is allowed to swell or shrink.

[0014] Preferably, the clamping mechanism also includes a plurality of spring sheets and connecting rods; one end of each of the spring sheets is rotatably connected to the clamping sleeve via a pin shaft, the plurality of connecting rods are fixed to the rubber layer, and the length direction of the plurality of connecting rods is parallel to the output shaft axis of the motor; the other end of each of the spring sheets is rotatably connected to each connecting rod.

[0015] A method for testing a motor dynamometer for a new energy vehicle, using the motor dynamometer for a new energy vehicle, specifically comprises the following steps: Step 1: Coaxial alignment: By controlling the height of the workbench, adjust the height of the motor output shaft so that the motor output shaft and the input end of the detection seat are coaxially aligned, and then fix the motor on the workbench; Step 2: Alignment connection: By driving the workbench to move forward and backward, the output shaft of the motor is aligned and plugged into the connecting mechanism along its axial direction. The connecting mechanism drives one end of the rotating rod to be inserted into the keyway of the motor output shaft to achieve connection and locking of the motor output shaft.

[0016] Beneficial effects of the present invention: By providing a connecting mechanism, a control mechanism and a linkage mechanism drive the coordinated rotation of multiple rotating rods, allowing one rotating rod to smoothly insert into the keyway of the motor output shaft, achieving deep engagement. The end of the other rotating rod then tightly contacts the outer wall of the motor output shaft, creating a stable clamping force. This ingenious mechanical structure design achieves precise positioning and secure clamping of the motor output shaft. The device can accommodate motor output shafts of various sizes and types, improving not only the clamping stability but also the accuracy of dynamometer testing and overall operational stability. By providing a positioning mechanism, as the rotating rod continues to rotate, the first positioning block and the second positioning block are pushed to form stable contact with the outer wall of the motor output shaft, thereby increasing the contact area with the motor output shaft, ensuring a precise and stable clamping effect for motor output shafts of different sizes and shapes, thereby providing reliable protection for dynamometer testing. By setting up a clamping mechanism, while driving the rotating rod to rotate and clamp, the rubber layer on the clamping sleeve is caused to expand under pressure and fit tightly with the output shaft of the motor, thereby achieving clamping and positioning of the motor output shaft. At the same time, the auxiliary clamping mechanism of the spring sheet and the connecting rod not only improves the clamping force, but also effectively prevents the occurrence of slipping, providing a strong guarantee for the stable operation of the motor and the accurate detection of the dynamometer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the three-dimensional structure of the internal structure of the connecting mechanism of the present invention; Figure 3 This invention Figure 2 Schematic diagram of the enlarged structure of area A in the middle; Figure 4 It is a schematic diagram of a three-dimensional enlarged structure of the connecting mechanism of the present invention; Figure 5 This is a schematic diagram of a three-dimensional enlarged structure of the connecting mechanism of the present invention after removing part of the connecting seat; Figure 6 This is a partially cutaway, three-dimensional, enlarged structural diagram of the connecting base of the present invention; Figure 7 It is a partially cutaway, three-dimensional, enlarged structural schematic diagram of the clamping mechanism of the present invention; Figure 8 It is a schematic diagram of a three-dimensional enlarged structure of the positioning mechanism of the present invention; Figure 9 This invention Figure 8 Schematic diagram of the enlarged structure of the middle B area; Figure 10 This is a schematic diagram of a three-dimensional enlarged exploded structure of the positioning mechanism of the present invention; Figure 11 It is a flow chart of the method of the present invention.

[0019] In the figure: 1. base; 2. detection base; 3. workbench; 4. motor; 5. connecting mechanism; 51. connecting base; 52. rotating rod; 53. rotating shaft; 54. control mechanism; 541. sliding block; 542. screw; 543. worm gear; 544. worm; 545. handwheel; 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. slider; 564. slide groove; 565. first compression spring; 57. clamping mechanism; 571. first cylinder; 572. piston; 573. clamping sleeve; 574. rubber layer; 575. spring sheet; 576. connecting rod. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0021] Example 1: Please refer to Figures 1-10 , a motor dynamometer based on new energy vehicles, such as Figure 1-Figure 3 As 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 a prior art and will not be described in detail; a plurality of linear modules are arranged between the workbench 3 and the base 1, and the workbench 3 can be driven to move up and down or forward and backward by the linear modules. It can be understood that the linear modules are a prior art and are not drawn in the figure and 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 to 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; a pair of rotating rods 52 are rotatably connected to the connecting seat 51 through a rotating shaft 53; 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; 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.

[0022] It should be noted that during the testing process of the dynamometer, in order to ensure that the output shafts of motors 4 of different types and sizes can be accurately and stably connected to the testing 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, ensuring that the central axes of the two are completely aligned; then, the linear module continues to drive the workbench 3, pushing the motor 4 to move smoothly along its axial direction until its output shaft is accurately inserted into the connecting seat 51, completing the preliminary alignment.

[0023] Next, we enter the critical keyway alignment link; by rotating and adjusting the connecting seat 51 or the output shaft of the motor 4, the keyway on the output shaft of the motor 4 is precisely aligned with the rotating rod 52 in the connecting seat. At this time, the control mechanism 54 is activated, driving the linkage mechanism 56 to move, thereby driving the multiple rotating rods 52 to rotate in coordination. During the rotation process, the linkage mechanism 56 accurately controls the movement of the rotating rods 52 until one of the rotating rods 52 is successfully inserted into the keyway of the output shaft of the motor 4, achieving deep interlocking; 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 precise positioning and stable clamping of the output shaft of the motor 4 are achieved.

[0024] This device can accommodate motor output shafts of various sizes and types, not only improving clamping stability but also significantly enhancing the dynamometer's accuracy and overall operational stability. This flexible and efficient clamping method provides a solid foundation for the reliable operation of the dynamometer in various application scenarios.

[0025] See also Figure 3 and Figure 5-Figure 6 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, and the two sides of the sector gear 561 are respectively engaged with the pair of racks 562; the slider 563 is fixed to the rack 562, and a sliding groove 564 adapted to the slider 563 is opened on the rotating rod 52, and the slider 563 is slidably connected in the sliding groove 564; a first compression spring 565 is provided between the connecting seat 51 and the rack 562; when the rack 562 loses its restriction, the first compression spring 565 is used to drive the rack 562 to slide and reset along its length direction.

[0026] It should be noted that the designed control mechanism 54 and linkage mechanism 56 achieve efficient clamping and precise positioning of the output shaft of motor 4. The specific process is as follows: the control mechanism 54 first drives the sector gear 561 to move axially. The movement of the sector gear 561, through meshing, drives the synchronous movement of a pair of racks 562. The movement of the racks 562 further drives one end of the connected rotating rod 52 toward the output shaft of motor 4 and toward it. When the end of one of the rotating rods 52 contacts the outer wall of the output shaft of motor 4, the rack 562 connected to that rotating rod 52 stops moving due to the reverse force.

[0027] At this point, the control mechanism 54 continues to drive the sector gear 561. Because the stopped rack 562 is meshing with the sector gear 561, the sector gear 561 begins to rotate under the constraint of the rack 562. The rotation of the sector gear 561 further drives the other rack 562 to continue moving, and the movement of the rack 562 drives the other rotating rod 52 to continue moving toward the output shaft of the motor 4 until the rotating rod 52 is precisely inserted into the keyway of the output shaft of the motor 4. In this way, the output shaft of the motor 4 is firmly clamped by the connecting mechanism 5.

[0028] This clamping method is significantly different from the traditional method of fixing the motor output shaft by relying solely on clamping force. By inserting the rotating rod 52 into the keyway of the motor 4 output shaft and utilizing the geometric fit of the keyway to achieve positioning clamping, the stability and reliability of the clamping are greatly improved. In addition, through the design of the linkage mechanism 56, the device can adapt to motor 4 output shafts of different types and sizes, ensuring coaxial alignment with the input end of the detection seat 2. This design not only improves the versatility and flexibility of the device, but also significantly improves the detection accuracy and operational stability of the dynamometer in different application scenarios.

[0029] See also Figure 3 and Figure 5-Figure 7 , 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 threadedly connected to the worm gear 543, the worm 544 is rotatably connected around its axis to the connecting seat 51, and the worm 544 is meshed with the worm gear 543; the handwheel 545 is provided on the worm 544 and is used to drive the worm 544 to rotate; it can be understood that the handwheel 545 and the worm 544 can be detachably connected to realize the detection seat 2 (such as Figure 1 As shown) and motor 4 (as Figure 1After the output shaft is connected (as shown), the handwheel 545 can be removed; the worm gear 543 and the connecting seat 51 are rotatably connected via 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.

[0030] It should be noted that the worm gear 543 is driven to rotate synchronously. Due to the threaded fit between the worm gear 543 and the screw 542, the rotation of the screw 542 is further converted into linear movement of the sliding block 541 along its length. This movement is precise and controllable, ensuring that the sliding block 541 can move stably along the predetermined trajectory. As the slider 541 moves, it further drives the connected sector gear 561 in the same direction. The movement of sector gear 561 is a key component of the linkage mechanism 56. Through its meshing relationship with subsequent components such as the rack, it converts the linear motion of the slider 541 into the complex motion of the linkage mechanism 56. This ingenious mechanical transmission design ultimately achieves the clamping operation of the output shaft of the motor 4.

[0031] This manual drive method is not only easy to operate, but also ensures stability and reliability during the clamping process through precise mechanical transmission. By rotating handwheel 545, the operator can intuitively control the clamping force and position, thereby achieving precise clamping of different types of motor output shafts, providing a solid foundation for dynamometer testing.

[0032] See also Figure 4 and Figures 8-10 , a positioning mechanism 55 is provided on the rotating rod 52; when the rotating rod 52 is rotated by force so that the positioning mechanism 55 and the motor 4 (such as Figure 1When the keyway of the output shaft (as shown) comes into conflict, 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 rotatably connected to the rotating rod 52 through a pin, and the axis of the pin between the first positioning block 551 and the rotating rod 52 is arranged parallel to the axis of the rotating shaft 53; a 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 rotatably connected through a plurality of rotating blocks 553 Then, 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. As the rotating thrust 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 a pair of second positioning blocks 552 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 its restriction, the torsion spring 554 is used to drive the second positioning block 552 to move and reset through the rotating block 553.

[0033] 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 toward the side wall of the output shaft of the motor 4. During this process, the second positioning block 552 first comes into contact with 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 toward the output shaft of the motor 4. At this time, the movement of the first positioning block 551 drives the connected rotating block 553 to rotate.

[0034] The rotation of the rotating block 553 further compresses the torsion spring 554, causing elastic deformation and energy storage. Simultaneously, the movement of the rotating block 553 pushes the two first positioning blocks 551 away from each other while they are in contact with the sidewalls of the motor 4 output shaft. This process continues until the first positioning blocks 551 finally come into close contact with the outer wall of the motor 4 output shaft.

[0035] At this point, both the first positioning block 551 and the second positioning block 552 form stable contact with the outer wall of the output shaft of motor 4. This design not only increases the contact area with the output shaft of motor 4, but also further enhances the stability and reliability of the clamping force through the elastic action of torsion spring 554. This ingenious mechanical linkage mechanism ensures precise and stable clamping for motor output shafts of varying sizes and shapes, providing reliable support for dynamometer testing.

[0036] Example 2: This example differs from Example 1 in that: Figure 4-Figure 7, a clamping mechanism 57 is provided on the connecting seat 51; when the linkage mechanism 56 moves, the linkage clamping mechanism 57 moves to achieve the clamping motor 4 (such as Figure 1 ) output shaft; the clamping mechanism 57 includes a first cylinder 571, multiple pistons 572, a clamping sleeve 573 and a rubber layer 574; the first cylinder 571 is arranged on the connecting seat 51, and the piston 572 is slidably connected to the first cylinder 571, and the piston 572 and the sliding block 541 are connected by a piston rod; multiple clamping sleeves 573 are arranged on the connecting seat 51, and the piston 572 divides 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 conveying pipe, and the other cavity is connected to the outside through a through hole, and the inner wall of the clamping sleeve 573 is a rubber layer 574 structure; when the air pressure in the clamping sleeve 573 changes, the rubber layer 574 is allowed to swell or shrink.

[0037] It should be noted that the movement of the sliding block 541 realizes the clamping and releasing of the output shaft of the motor 4 through a set of sophisticated pneumatic mechanisms. The specific process is as follows: 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 in the first cylinder 571 through the piston rod connected to it. As the piston 572 moves, the cavity in the first cylinder 571 is gradually compressed, causing the air pressure in the cylinder to rise rapidly. At this time, the air in the cylinder is squeezed and transported to the clamping sleeve 573 through the delivery pipe. As air is continuously injected, the rubber layer 574 on the clamping sleeve 573 is under pressure and begins to expand. The expansion of the rubber layer 574 fits tightly against the output shaft of the motor 4, thereby achieving a firm 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; at the same time, the sliding block 541 and the piston rod can be connected by a second compression spring to accurately control the clamping force of the output shaft of the motor 4 to prevent excessive clamping.

[0038] 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. The rubber layer 574 on the clamping sleeve 573 begins to gradually shrink due to the loss of external pressure support. The contraction of the rubber layer 574 eliminates the contact pressure between its inner wall and the output shaft of the motor 4, thereby loosening the clamping of the motor output shaft.

[0039] This ingenious pneumatic design allows the system to precisely control clamping and releasing operations based on the movement direction of the slider 541. This mechanism not only improves the flexibility and responsiveness of the clamping process, but also ensures protection of the motor output shaft throughout the entire operation, providing an efficient and reliable clamping solution for dynamometer testing.

[0040] See also Figure 4-Figure 7 The clamping mechanism 57 also includes a plurality of spring sheets 575 and connecting rods 576; one end of each spring sheet 575 is rotatably connected to the clamping sleeve 573 through a pin shaft, and a plurality of connecting rods 576 are fixed to 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 sheet 575 is rotatably connected to each connecting rod 576.

[0041] It should be noted that in order to further improve the motor 4 (such as Figure 1 The clamping force of the output shaft is increased and the reliability of the clamping is ensured. The clever cooperation between the spring sheet 575 and the connecting rod 576 effectively enhances the clamping effect.

[0042] When the rubber layer 574 expands under the action of pneumatic pressure, the connecting rod 576 on its outer side is pushed accordingly. The movement of the connecting rod 576 further drives the spring sheet 575 connected to it to rotate. As the spring sheet 575 rotates, one end of it gradually approaches the side wall of the output shaft of the motor 4 and eventually comes into close contact with the outer wall of the output shaft. At this time, the spring sheet 575, by virtue of its own elastic properties, exerts a certain supporting force on the side wall of the output shaft of the motor 4. This supporting force cooperates with the expanding 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.

[0043] With this design, when motor 4 starts and drives the output shaft to rotate, the supporting force of spring sheet 575 effectively prevents slippage between rubber layer 574 and the output shaft of motor 4. This slippage is common in traditional clamping methods, especially under high-torque or high-speed conditions, and can cause clamping failure or even damage the motor output shaft. However, the auxiliary support of spring sheet 575 in this system not only enhances clamping stability, but also extends the service life of rubber layer 574, ensuring the reliable operation of motor 4 under various operating conditions.

[0044] In summary, through the auxiliary clamping mechanism of the spring sheet 575 and the connecting rod 576, the system not only improves the clamping force, but also effectively prevents the occurrence of slipping, providing a strong guarantee for the stable operation of the motor 4 and the accurate detection of the dynamometer.

[0045] See also Figures 1-11A method for testing a motor dynamometer for a new energy vehicle, using the motor dynamometer for a new energy vehicle, specifically comprises the following steps: Step 1: Coaxial alignment: By controlling the height of the workbench 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 base 2, and then fix the motor 4 on the workbench 3; Step 2: Alignment connection: By driving the workbench 3 to move forward and backward, the output shaft of the motor 4 is aligned and plugged into the connecting mechanism 5 along its axial direction, and one end of the rotating rod 52 is driven by the connecting mechanism 5 to be inserted into the keyway of the output shaft of the motor 4, thereby realizing the connection and locking of the output shaft of the motor 4.

[0046] In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction and a specific direction structure and operation, and therefore, cannot be understood as limiting the present invention. In addition, "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0047] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0048] The above is a detailed description of an embodiment of the present invention. However, the content described is only a preferred embodiment of the present invention and should not be considered to limit the scope of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A motor dynamometer based on new energy vehicles, comprising a detection seat (2) and a workbench (3) arranged on a base (1); a motor (4) is mounted on the workbench (3), and an output end of the motor (4) is connected to the detection 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) comprises: A connecting seat (51), one end of the connecting seat (51) is arranged on the detection seat (2); A pair of rotating rods (52), wherein the pair of rotating rods (52) are rotatably connected to the connecting seat (51) via a rotating shaft (53); A linkage mechanism (56) is mounted on the connecting seat (51) and is used to push one end of the rotating rod (52) to rotate, thereby driving 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 a keyway on the output shaft of the motor (4); and a control mechanism (54), wherein the control mechanism (54) is mounted on the connecting seat (51) and is used to drive the linkage mechanism (56) to move, thereby driving the pair of rotating rods (52) to rotate synchronously.

2. A motor dynamometer based on new energy vehicles according to claim 1, characterized in that: 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), the pair of racks (562) are slidably connected to the connecting seat (51) along their length direction, and both sides of the sector gear (561) are respectively engaged with the pair of racks (562); the slider (563) is fixed to the rack (562), and a sliding groove (564) adapted to the slider (563) is provided on the rotating rod (52), and the slider (563) is slidably connected in the sliding groove (564); A first compression spring (565) is provided between the connecting seat (51) and the rack (562); when the rack (562) loses its restraint, the first compression spring (565) is used to drive the rack (562) to slide and reset along its length direction.

3. A motor dynamometer based on new energy vehicles according to claim 2, characterized in that: The control mechanism (54) includes a sliding block (541), a screw (542), a worm wheel (543), a worm (544) and a hand wheel (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 wheel (543) is rotatably connected to the connecting seat (51); the screw (542) is coaxially threadedly connected to the worm wheel (543); the worm (544) is rotatably connected to the connecting seat (51) around its axis, and the worm (544) is meshed with the worm wheel (543); the hand wheel (545) is provided on the worm (544) and is used to drive the worm (544) to rotate.

4. A motor dynamometer based on new energy vehicles according to claim 3, characterized in that: The worm wheel (543) and the connecting seat (51) are rotatably connected via 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 wheel (543).

5. The motor dynamometer based on new energy vehicles according to claim 1, characterized in that: A positioning mechanism (55) is provided on the rotating rod (52); when the rotating rod (52) is rotated by force so that the positioning mechanism (55) comes into contact with the keyway of the output shaft of the motor (4), the positioning mechanism (55) is expanded by force to adapt to the width of the keyway of the output shaft of the motor (4).

6. The motor dynamometer based on new energy vehicles according to claim 5, characterized in that: 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) and the rotating rod (52) are rotatably connected via a pin, and the axis of the pin between the first positioning block (551) and the rotating rod (52) is arranged parallel to 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 rotatably connected via a 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); as the rotating rod (52) rotates with increasing thrust, the first positioning block (551) approaches 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, thereby increasing the contact surface with the output shaft of the motor (4); and when the second positioning block (552) loses its restriction, the torsion spring (554) is used to drive the second positioning block (552) to move and reset through the rotating block (553).

7. The motor dynamometer for new energy vehicles according to claim 3, characterized in that: A clamping mechanism (57) is provided on the connecting seat (51); when the linkage mechanism (56) moves, the linkage clamping mechanism (57) moves to clamp the output shaft of the motor (4).

8. The motor dynamometer for new energy vehicles according to claim 7, characterized in that: The clamping mechanism (57) includes a first cylinder (571), a plurality of pistons (572), a clamping sleeve (573) and a rubber layer (574); the first cylinder (571) is arranged on the connecting seat (51), the piston (572) is slidably connected in the first cylinder (571), and the piston (572) and the sliding block (541) are connected through a piston rod; the plurality of clamping sleeves (573) are arranged on the connecting seat (51), the piston (572) divides the first cylinder (571) into two cavities, the cavity away from the clamping sleeve (573) is connected to the inside of the clamping sleeve (573) through a conveying pipe, and the inner wall of the clamping sleeve (573) is a rubber layer (574) structure; when the air pressure in the clamping sleeve (573) changes, the rubber layer (574) is allowed to swell or shrink.

9. The motor dynamometer based on new energy vehicles according to claim 8, characterized in that: The clamping mechanism (57) further comprises a plurality of spring sheets (575) and connecting rods (576); one end of each of the spring sheets (575) is rotatably connected to the clamping sleeve (573) via a pin shaft, the plurality of connecting rods (576) are fixed to 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 of the spring sheets (575) is rotatably connected to each of the connecting rods (576).

10. A method for testing a motor dynamometer for a new energy vehicle, characterized in that: The motor dynamometer for new energy vehicles according to any one of claims 1 to 9 is used, specifically comprising the following steps: Step 1, coaxial alignment: by controlling the height of the workbench (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 workbench (3); Step 2: Alignment connection: by driving the workbench (3) to move forward and backward, the output shaft of the motor (4) is aligned and plugged into the connecting mechanism (5) along its axial direction, and one end of the rotating rod (52) is driven by the connecting mechanism (5) to be plugged into the keyway of the output shaft of the motor (4), thereby achieving connection and locking of the output shaft of the motor (4).

Images