A new energy vehicle short axle performance testing device and method

Abstract

The present invention discloses a short-axle performance test device and method for new energy vehicles. The present invention relates to the field of automotive parts testing technology, comprising a base, wherein a dynamic support is provided on an external transverse sliding sleeve at one end of the base, a test motor is installed on one side above the dynamic support, and the output shaft of the test motor is located on the other side of the dynamic support and is connected to a dynamic three-disc clamping claw. A fixed support is provided on the upper part of the end of the base away from the dynamic support, and a fixed three-disc clamping claw corresponding to the dynamic three-disc clamping claw is rotatably provided on the side of the fixed support close to the dynamic three-disc clamping claw. The short-axle performance test device for new energy vehicles integrates torque and wear resistance testing, and realizes multiple performance evaluation tests on a single platform. This feature not only improves the accuracy of short-axle testing for new energy vehicles, but also helps to comprehensively analyze the working performance of the short-axle, thereby optimizing the design and ensuring the reliability and durability of the transmission system.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts testing, and in particular to a device and method for testing the short-axle performance of a new energy vehicle. Background Art

[0002] With the rapid development of new energy vehicle technology, the short axle, as a key component in the transmission system of new energy vehicles, its performance is crucial to the power performance and safety of the entire vehicle.

[0003] At present, the field of short-axle performance testing of new energy vehicles faces an obvious technological gap. There is a lack of testing equipment specially designed for this purpose. Most of the existing testing equipment is for traditional automotive parts or modified general mechanical testing equipment. These devices have problems such as insufficient applicability, limited testing accuracy, and complex operation when testing the short-axle performance of new energy vehicles. They cannot fully meet the high standards and special needs of short-axle performance testing of new energy vehicles.

[0004] The invention with Chinese patent publication number CN115950566A discloses a static torque test fixture for an electric compressor motor stator and a torque test method thereof. The static torque test fixture for an electric compressor motor stator includes an intermediate column, multiple fastening blades, a long shaft, a short shaft and a fixing device. The intermediate column has multiple threaded holes. During the test, the motor stator is first assembled in place and in a horizontal state, the fastening blades are placed in the motor stator slots, and then the intermediate column is rotated to position and fix the short shaft with the rotor slots at the bottom of the compressor housing. When the fastening blades contact the edges of the motor stator slots, the short shaft is connected to the motor stator bearing, and the fixing device is connected to the intermediate column. A suitable torque wrench is put on the long shaft to perform a rotational torque test. After the test is completed, the value on the torque dial can be read, thereby enabling the static torque of the electric compressor motor stator to be measured quickly and accurately. Although the fixture can test the torque of the stator, it cannot test the torque condition of the stator under different load conditions. Summary of the Invention

[0005] In response to the shortcomings of the existing technology, the present invention provides a new energy vehicle short-axle performance testing device and method, which solves the problem that there is currently a lack of dedicated equipment for new energy vehicle short-axle performance testing, which makes it difficult for existing testing methods to meet the high standards of accuracy and ease of operation.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a new energy vehicle short-axis performance test device, including a base, a dynamic support is provided on the external lateral sliding sleeve of one end of the base, a test motor is installed on the upper side of the dynamic support, and the output shaft of the test motor is located on the other side of the dynamic support and is connected to the dynamic three-disc clamping claw. A fixed support is provided on the upper part of the end of the base away from the dynamic support, and a fixed three-disc clamping claw corresponding to the dynamic three-disc clamping claw is rotatably provided on the side of the fixed support close to the dynamic three-disc clamping claw. The new energy vehicle short-axis performance test device also includes a torque testing mechanism for performing torque testing on the short axis and a wear-resistant testing mechanism for wear-resistant testing. A screw slide for driving the lateral displacement of the dynamic support is installed at the bottom of the base.

[0007] The torque testing mechanism includes a movable sleeve longitudinally slidingly sleeved on the outside of the fixed support and a driving gear rotatably arranged on the side of the fixed support away from the fixed three-disc claw. The driving gear is connected to the fixed three-disc claw. The upper part of the movable sleeve is vertically connected with a rack mechanism, which is engaged with the driving gear. A limiting sleeve is provided on one side of the movable sleeve. The torque testing mechanism also includes a torque adjustment mechanism for adding or subtracting loads on the short shaft to test the torque of the short shaft under different loads. A speed sensor for detecting the rotational speed of the short shaft is installed on the side of the driving gear away from the fixed support.

[0008] Preferably, a circular groove is further provided on the upper part of the movable sleeve, and a top shaft is longitudinally slidably provided in the circular groove. The lower end of the top shaft is connected to the inner lower side of the circular groove by a third spring. A contact switch corresponding to the top shaft is provided on one side of the fixed support, and the upper end of the top shaft extends out of the circular groove. When the top shaft contacts the contact switch, the power supply of the test motor will be turned off.

[0009] Preferably, the torque adjustment mechanism includes a fixed seat arranged on one side of the fixed support, a limiting shaft is provided on the upper part of the fixed seat, the limiting shaft slides longitudinally through the limiting sleeve, and the upper end external longitudinal sliding sleeve of the limiting shaft is provided with a slide, and an open groove is also provided on one side of the fixed support. The torque adjustment mechanism also includes a servo motor arranged in the open groove, the output shaft of the servo motor is connected to a screw, and the end of the slide away from the limiting shaft is screwed to the outside of the screw through a thread.

[0010] Preferably, the rack mechanism includes a limiting shell, in which a rack plate is installed for transverse sliding in the limiting shell, the side of the rack plate with the tooth block extends out of the limiting shell, and an iron plate is provided on the side of the rack plate away from the tooth block, and an electromagnet is provided on the inner side of the limiting shell.

[0011] Preferably, the two ends of the rack plate are connected to the inner side of the limit shell through a first spring, the suction force of the electromagnet on the iron plate is greater than the elastic force of the first spring, and when the first spring is in the reset state, the rack plate is engaged with the driving gear. When the electromagnet adsorbs the iron plate, there is no engagement between the rack plate and the driving gear.

[0012] Preferably, the wear-resistant testing mechanism includes a barrel cover, the barrel cover and the dynamic three-disc clamping claw are located on the same central axis, a wear-resistant testing auxiliary component is provided at the bottom of the barrel cover, and moving blocks are inserted transversely and slideably on both sides of the barrel cover, and the two moving blocks are located on one side of the barrel cover and are provided with a sanding plate for rubbing the short shaft, and convex plates are provided at the two edges on the other side of the moving block, and the convex plates are connected to the barrel cover by a fourth spring, and a bolt rod is rotatably provided on the upper part of the barrel cover, and a concave seat is screwed on the outside of the bolt rod through a thread, and the two ends of the concave seat are respectively located on one side of the two moving blocks.

[0013] Preferably, inclined surfaces are provided on both sides of the interior of the concave seat. When the concave seat moves downward, the inclined surfaces squeeze the moving block, causing the sanding plate to contact the short shaft, thereby achieving friction for short shafts of different diameters.

[0014] Preferably, the wear resistance test auxiliary component includes an L-shaped shaft connected to the bottom of the barrel cover and a slave bevel gear fixedly sleeved on the outside of the fixed three-disc clamp. A limit seat is provided on the side of the fixed support close to the dynamic support. A main bevel gear is rotatably provided at the bottom of the limit seat. The main bevel gear is engaged with the slave bevel gear. The end of the L-shaped shaft away from the barrel cover slides horizontally through a side of the fixed support. A connecting rod is hinged at the lower edge of the main bevel gear, and the other end of the connecting rod is hinged to the upper side of the L-shaped shaft.

[0015] A method for testing the short-axle performance of a new energy vehicle comprises the following steps:

[0016] S1. Fix the short shaft to be tested to the movable three-disc claw, and then the screw slide drives the movable support to move, so that the short shaft passes through the cylinder cover and is fixed on the fixed three-disc claw. Then the test motor drives the movable three-disc claw to rotate, and the movable three-disc claw drives the short shaft to rotate, and the short shaft will drive the fixed three-disc claw to rotate, and the fixed three-disc claw drives the driving gear to rotate, and the driving gear drives the rack mechanism meshing with it to move longitudinally, so that the rack mechanism moves upward, and the rack mechanism will drive the moving sleeve to move upward. When the top shaft contacts the contact switch, the power supply of the test motor will be turned off. When the top shaft is in the position from the contact switch to the contact switch, the speed of the short shaft can be tested. The speed of the short shaft can be tested by the speed sensor, so that the torque of the short shaft can be known.

[0017] S2. The servo motor drives the screw to rotate, which drives the slide to move longitudinally, causing the slide to compress or stretch the second spring, changing the load on the short shaft. When the second spring is compressed to the required position, the second spring will exert greater pressure on the limit sleeve, so that the rack mechanism will move slower, thereby slowing down the speed of the short shaft. Test the torque of the short shaft when the load is increased. Conversely, when the second spring is stretched to the required position, the speed of the short shaft will increase. Test the torque of the short shaft when the load is reduced.

[0018] S3. When the wear resistance of the short shaft needs to be tested, the bolt rod is rotated to drive the concave seat to move downward, and the inclined surfaces on both sides of the concave seat will squeeze the moving block. Under the elasticity of the fourth spring, the two moving blocks will approach each other, so that the sanding plate on the moving block will contact the short shaft. After contact, when the test motor drives the three-disc claw to drive the short shaft to rotate, the sanding plate will rub the short shaft to test the wear resistance of the short shaft. When the short shaft rotates, it will drive the fixed three-disc claw to rotate, and the fixed three-disc claw makes the slave bevel gear rotate, and the slave bevel gear drives the main bevel gear meshing with it to rotate, and the main bevel gear drives the connecting rod to perform eccentric motion, thereby driving the L-shaped shaft to move back and forth continuously, and then the barrel cover moves back and forth continuously, performing axial friction on the short shaft, realizing the integration of rotational friction and axial friction, and better testing the wear resistance of the short shaft;

[0019] S4. When the torque test and wear test do not need to be performed simultaneously, turn on the power of the electromagnet. The electromagnet will adsorb the iron plate and make the rack plate leave the driving gear. In this way, during the friction test, the driving gear will not drive the rack mechanism to move, and the torque test will not be performed on the short shaft.

[0020] The present invention provides a device and method for testing the short-axle performance of new energy vehicles, which have the following advantages over the prior art:

[0021] 1. This new energy vehicle short-axle performance testing device and method integrates torque and wear resistance testing, enabling multiple performance evaluation tests to be conducted on a single platform. This feature not only improves the accuracy of new energy vehicle short-axle testing, but also helps to comprehensively analyze the working performance of the short axle, thereby optimizing the design and ensuring the reliability and durability of the transmission system.

[0022] 2. The new energy vehicle short-axle performance testing device and method can change the load of the short-axle when performing torque testing on the short-axle, thereby testing the torque of the short-axle under different loads and improving the test accuracy.

[0023] 3. The new energy vehicle short shaft performance testing device and method can perform wear resistance tests on short shafts of different sizes through a wear resistance testing mechanism, and can also integrate axial wear resistance tests and rotational wear resistance tests on the short shaft.

[0024] 4. The new energy vehicle short-axle performance testing device and method, through the setting of the rack mechanism, can not only conduct the torque test and wear test of the short-axle simultaneously, but also can test them separately and successively without interfering with each other during the tests. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 Schematic diagram of the torque testing mechanism of the present invention;

[0027] Figure 3 Schematic diagram of the connection structure between the driving gear and the rack mechanism of the present invention;

[0028] Figure 4 Schematic diagram of the structure of the torque adjustment mechanism of the present invention;

[0029] Figure 5 This is a schematic diagram of the connection of the top shaft structure of the present invention;

[0030] Figure 6 It is a structural schematic diagram of the mobile sleeve of the present invention;

[0031] Figure 7 Schematic diagram of the three-dimensional structure of the rack mechanism of the present invention;

[0032] Figure 8 Schematic diagram of the cross-sectional structure of the rack mechanism of the present invention;

[0033] Figure 9 Schematic diagram of the structure of the wear-resistant testing mechanism of the present invention;

[0034] Figure 10 It is a structural schematic diagram of the barrel cover of the present invention;

[0035] Figure 11 It is a structural schematic diagram of the concave seat of the present invention;

[0036] Figure 12 It is a structural schematic diagram of the wear resistance test auxiliary component of the present invention.

[0037] In the figure: 1. Base; 2. Moving support; 3. Test motor; 4. Moving three-disc clamping claw; 5. Fixed support; 6. Fixed three-disc clamping claw; 7. Torque test mechanism; 71. Moving sleeve; 72. Driving gear; 73. Rack mechanism; 731. Limiting shell; 732. Rack plate; 733. Iron plate; 734. Electromagnet; 735. First spring; 74. Limiting sleeve; 75. Torque adjustment mechanism; 751. Fixed seat; 752. Limiting shaft; 753. Sliding seat; 754. Second spring; 755. Servo Motor; 756, screw; 76, circular groove; 77, top shaft; 771, third spring; 78, speed sensor; 8, contact switch; 9, wear-resistant test mechanism; 91, barrel cover; 92, wear-resistant test auxiliary component; 921, L-shaped shaft; 922, slave bevel gear; 923, limit seat; 924, main bevel gear; 925, connecting rod; 93, moving block; 94, sanding plate; 95, convex plate; 96, fourth spring; 97, bolt rod; 98, concave seat; 99, inclined plane; 10, screw slide. DETAILED DESCRIPTION

[0038] 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 creative efforts are within the scope of protection of the present invention.

[0039] See also Figures 1-12 , the present invention provides four technical solutions:

[0040] Example 1

[0041] See also Figure 1 In an embodiment of the present invention, a short-axle performance test device for new energy vehicles includes a base 1, a dynamic support 2 is provided on the external transverse sliding sleeve at one end of the base 1, a test motor 3 is installed on the upper side of the dynamic support 2, and the output shaft of the test motor 3 is located on the other side of the dynamic support 2 and is connected to a dynamic three-disc clamping claw 4. A fixed support 5 is provided on the upper part of the end of the base 1 away from the dynamic support 2, and a fixed three-disc clamping claw 6 corresponding to the dynamic three-disc clamping claw 4 is rotatably provided on the side of the fixed support 5 close to the dynamic three-disc clamping claw 4. The short-axle performance test device for new energy vehicles also includes a torque testing mechanism 7 for performing torque testing on the short axle and a wear-resistant testing mechanism 9 for wear-resistant testing. A screw slide 10 for driving the lateral displacement of the dynamic support 2 is installed at the bottom of the base 1.

[0042] See also Figure 1 and Figure 2In the embodiment of the present invention, the torque testing mechanism 7 includes a movable sleeve 71 longitudinally slidingly sleeveed on the outside of the fixed support 5 and a driving gear 72 rotatably arranged on the side of the fixed support 5 away from the fixed three-disc claw 6. The driving gear 72 is connected to the fixed three-disc claw 6. The upper part of the movable sleeve 71 is vertically connected with a rack mechanism 73, which meshes with the driving gear 72. A limiting sleeve 74 is provided on one side of the movable sleeve 71. The torque testing mechanism 7 also includes a torque adjustment mechanism 75 for adding or subtracting loads on the short shaft to test the torque of the short shaft under different loads. A speed sensor 78 for detecting the rotational speed of the short shaft is installed on the side of the driving gear 72 away from the fixed support 5.

[0043] See also Figure 3 and Figure 5-Figure 6 In the embodiment of the present invention, a circular groove 76 is further provided on the upper portion of the movable sleeve 71, and a top shaft 77 is longitudinally slidably provided in the circular groove 76. The lower end of the top shaft 77 is connected to the lower side of the inner portion of the circular groove 76 by a third spring 771. A contact switch 8 corresponding to the top shaft 77 is provided on one side of the fixed support 5. The upper end of the top shaft 77 extends out of the circular groove 76. When the top shaft 77 contacts the contact switch 8, the power supply of the test motor 3 will be turned off. When the top shaft 77 contacts the contact switch 8, the third spring 771 plays a buffering role to prevent the contact switch 8 from being damaged.

[0044] In the above scheme: the short shaft to be tested is fixed to the dynamic three-disc claw 4, and then the screw slide 10 drives the dynamic support 2 to move, so that the short shaft passes through the barrel cover 91 and is fixed on the fixed three-disc claw 6, and then the test motor 3 drives the dynamic three-disc claw 4 to rotate, and the dynamic three-disc claw 4 drives the short shaft to rotate, and the short shaft will drive the fixed three-disc claw 6 to rotate, and the fixed three-disc claw 6 drives the driving gear 72 to rotate, and the driving gear 72 drives the rack mechanism 73 meshing with it to move longitudinally, so that the rack mechanism 73 moves upward, and the rack mechanism 73 will drive the movable sleeve 71 to move upward, and when the top shaft 77 contacts the contact switch 8, the power supply of the test motor 3 will be turned off. When the test top shaft 77 is in the position from the contact switch 8, the speed of the short shaft can be tested by the speed sensor 78, so that the torque of the short shaft can be known.

[0045] The second embodiment differs from the first embodiment in that:

[0046] See also Figure 2-Figure 4In the embodiment of the present invention, the torque adjustment mechanism 75 includes a fixed seat 751 arranged on one side of the fixed support 5, and a limiting shaft 752 is provided on the upper part of the fixed seat 751. The limiting shaft 752 slides longitudinally through the limiting sleeve 74, and the upper end of the limiting shaft 752 is provided with a slide 753 on the outer longitudinal sliding sleeve. An open groove is also provided on one side of the fixed support 5. The torque adjustment mechanism 75 also includes a servo motor 755 arranged in the open groove. The output shaft of the servo motor 755 is connected to a screw 756, and the end of the slide 753 away from the limiting shaft 752 is screwed to the outside of the screw 756 through a thread.

[0047] In the above scheme: the screw 756 is driven to rotate by the servo motor 755, and the screw 756 drives the slide 753 to move longitudinally, so that the slide 753 compresses or stretches the second spring 754, changes the load condition of the short shaft, and when the second spring 754 is compressed to the required position, the pressure generated by the second spring 754 on the limit sleeve 74 becomes greater, so that the speed of the rack mechanism 73 is slowed down during displacement, thereby slowing down the rotation speed of the short shaft, and testing the torque size of the short shaft when the load is increased. Conversely, when the second spring 754 is stretched to the required position, the rotation speed of the short shaft will become faster, and testing the torque size of the short shaft when the load is reduced.

[0048] The third embodiment differs from the first embodiment in that:

[0049] See also Figure 7-Figure 8 In the embodiment of the present invention, the rack mechanism 73 includes a limit shell 731, in which a rack plate 732 is installed for transverse sliding in the limit shell 731, and the side of the rack plate 732 with the tooth block extends out of the limit shell 731, and an iron plate 733 is provided on the side of the rack plate 732 away from the tooth block, and an electromagnet 734 is provided on the inner side of the limit shell 731.

[0050] In the above scheme: when the torque test and the wear resistance test do not need to be carried out simultaneously, the power supply of the electromagnet 734 is turned on, and the electromagnet 734 will adsorb the iron plate 733, so that the rack plate 732 leaves the drive gear 72. In this way, during the friction test, the drive gear 72 will not drive the rack mechanism 73 to move, and thus the torque test will not be performed on the short shaft.

[0051] For further information, see Figure 7-Figure 8 In the embodiment of the present invention, the two ends of the rack plate 732 are connected to the inner side of the limit shell 731 through the first spring 735. The suction force of the electromagnet 734 on the iron plate 733 is greater than the elastic force of the first spring 735. When the first spring 735 is in the reset state, the rack plate 732 is engaged with the driving gear 72. When the electromagnet 734 adsorbs the iron plate 733, there is no engagement between the rack plate 732 and the driving gear 72.

[0052] The fourth embodiment differs from the first embodiment in that:

[0053] See also Figure 9-10 In the embodiment of the present invention, the wear-resistant testing mechanism 9 includes a barrel cover 91. The barrel cover 91 and the dynamic three-disc clamping claw 4 are located on the same central axis. A wear-resistant testing auxiliary component 92 is provided at the bottom of the barrel cover 91, and moving blocks 93 are inserted transversely and slideably on both sides of the barrel cover 91. The two moving blocks 93 are located on one side of the barrel cover 91 and are provided with a sanding plate 94 for rubbing the short shaft, and convex plates 95 are provided on the two edges of the other side of the moving block 93. The convex plate 95 is connected to the barrel cover 91 by a fourth spring 96. A bolt rod 97 is rotatably provided on the upper part of the barrel cover 91. The outer side of the bolt rod 97 is screwed with a concave seat 98 by a thread. The two ends of the concave seat 98 are respectively located on one side of the two moving blocks 93.

[0054] See also Figure 10-11 In the embodiment of the present invention, inclined surfaces 99 are provided on both sides of the interior of the concave seat 98. When the concave seat 98 moves downward, the inclined surfaces 99 squeeze the moving block 93, causing the sanding plate 94 to contact the short shaft, thereby achieving friction of short shafts of different diameters.

[0055] See also Figure 9 and Figure 12 In the embodiment of the present invention, the wear resistance test auxiliary component 92 includes an L-shaped shaft 921 connected to the bottom of the barrel cover 91 and a slave bevel gear 922 fixedly sleeved on the outside of the fixed three-disc clamp 6. A limit seat 923 is provided on the side of the fixed support 5 close to the movable support 2. A main bevel gear 924 is rotatably provided at the bottom of the limit seat 923. The main bevel gear 924 is meshed with the slave bevel gear 922. The end of the L-shaped shaft 921 away from the barrel cover 91 slides horizontally through a side of the fixed support 5. A connecting rod 925 is hinged at the lower edge of the main bevel gear 924, and the other end of the connecting rod 925 is hinged to the upper side of the L-shaped shaft 921.

[0056] In the above scheme: when it is necessary to test the wear resistance of the short shaft, the bolt rod 97 is rotated to drive the concave seat 98 to move downward, and the inclined surfaces 99 on both sides of the concave seat 98 will squeeze the moving block 93. Under the elasticity of the fourth spring 96, the two moving blocks 93 will approach each other, so that the sanding plate 94 on the moving block 93 will contact the short shaft. After contact, when the test motor 3 drives the three-disc claw 4 to drive the short shaft to rotate, the sanding plate 94 will rub the short shaft to test the wear resistance of the short shaft. When the short shaft rotates, it will drive the fixed three-disc claw 6 to rotate, and the fixed three-disc claw 6 makes the slave bevel gear 922 rotate, and the slave bevel gear 922 drives the main bevel gear 924 meshing with it to rotate, and the main bevel gear 924 drives the connecting rod 925 to perform eccentric motion, thereby driving the L-shaped shaft 921 to move back and forth continuously, and then the barrel cover 91 moves back and forth continuously, performing axial friction on the short shaft, realizing the integration of rotational friction and axial friction, and better testing the wear resistance of the short shaft.

[0057] A new energy vehicle short axle performance testing method includes testing the short axle of the new energy vehicle using a new energy vehicle short axle performance testing device, and the testing method includes the following steps:

[0058] S1. Fix the short shaft to be tested to the movable three-disc claw 4, and then the screw slide 10 drives the movable support 2 to move, so that the short shaft passes through the barrel cover 91 and is fixed on the fixed three-disc claw 6. Then the test motor 3 drives the movable three-disc claw 4 to rotate, and the movable three-disc claw 4 drives the short shaft to rotate, and the short shaft will drive the fixed three-disc claw 6 to rotate, and the fixed three-disc claw 6 drives the driving gear 72 to rotate, and the driving gear 72 drives the rack mechanism 73 meshing with it to move longitudinally, so that the rack mechanism 73 moves upward, and the rack mechanism 73 will drive the movable sleeve 71 to move upward. When the top shaft 77 contacts the contact switch 8, the power supply of the test motor 3 will be turned off. When the test top shaft 77 reaches the position of the contact switch 8, the speed of the short shaft can be tested by the speed sensor 78, so that the torque of the short shaft can be known.

[0059] S2. The servo motor 755 drives the screw 756 to rotate, and the screw 756 drives the slide 753 to move longitudinally, so that the slide 753 compresses or stretches the second spring 754, changing the load of the short shaft. When the second spring 754 is compressed to the required position, the pressure exerted by the second spring 754 on the limit sleeve 74 increases, so that the speed of the rack mechanism 73 when displacing slows down, thereby slowing down the speed of the short shaft. The torque of the short shaft is tested when the load is increased. Conversely, when the second spring 754 is stretched to the required position, the speed of the short shaft becomes faster. The torque of the short shaft is tested when the load is reduced.

[0060] S3, when it is necessary to test the wear resistance of the short shaft, the bolt rod 97 is rotated to drive the concave seat 98 to move downward, and the inclined surfaces 99 on both sides of the concave seat 98 will squeeze the moving block 93. Under the elasticity of the fourth spring 96, the two moving blocks 93 will approach each other, so that the sanding plate 94 on the moving block 93 will contact the short shaft. After contact, when the test motor 3 drives the three-disc clamping claw 4 to drive the short shaft to rotate, the sanding plate 94 will rub the short shaft to test the wear resistance of the short shaft. When the short shaft rotates, it will drive the fixed three-disc clamping claw 6 to rotate, and the fixed three-disc clamping claw 6 makes the slave bevel gear 922 rotate, and the slave bevel gear 922 drives the main bevel gear 924 meshing with it to rotate, and the main bevel gear 924 drives the connecting rod 925 to perform eccentric movement, thereby driving the L-shaped shaft 921 to move back and forth continuously, and then the barrel cover 91 moves back and forth continuously, performing axial friction on the short shaft, realizing the integration of rotational friction and axial friction, and better testing the wear resistance of the short shaft;

[0061] S4. When the torque test and the wear test do not need to be performed simultaneously, the power supply of the electromagnet 734 is turned on. The electromagnet 734 will adsorb the iron plate 733, so that the rack plate 732 is separated from the driving gear 72. In this way, during the friction test, the driving gear 72 will not drive the rack mechanism 73 to move, and thus the torque test will not be performed on the short shaft.

[0062] At the same time, the contents not described in detail in this specification belong to the existing technology well known to those skilled in the art.

Claims

1. A new energy vehicle short-axle performance test device, comprising a base (1), characterized in that: A movable support (2) is provided on the outer lateral sliding sleeve at one end of the base (1), a test motor (3) is installed on one side above the movable support (2), an output shaft of the test motor (3) is located at the other side of the movable support (2) and is connected to a movable three-disc clamping claw (4), a fixed support (5) is provided on the upper part of one end of the base (1) away from the movable support (2), a fixed three-disc clamping claw (6) corresponding to the movable three-disc clamping claw (4) is rotatably provided on the side of the fixed support (5) close to the movable three-disc clamping claw (4), the new energy vehicle short shaft performance test device further comprises a torque test mechanism (7) for performing a torque test on the short shaft and a wear test mechanism (9) for performing a wear test, and a screw slide (10) for driving the lateral displacement of the movable support (2) is installed at the bottom of the base (1); The torque testing mechanism (7) includes a movable sleeve (71) longitudinally slidingly sleeved on the outside of the fixed support (5) and a driving gear (72) rotatably arranged on a side of the fixed support (5) away from the fixed three-disc claw (6), the driving gear (72) is connected to the fixed three-disc claw (6), the upper part of the movable sleeve (71) is vertically connected to a rack mechanism (73), the rack mechanism (73) is engaged with the driving gear (72), and a limiting sleeve (74) is provided on one side of the movable sleeve (71). The torque testing mechanism (7) also includes a torque adjustment mechanism (75) for adding or subtracting loads on the short shaft, and testing the torque of the short shaft under different loads. A speed sensor (78) for detecting the rotational speed of the short shaft is installed on the side of the driving gear (72) away from the fixed support (5).

2. A new energy vehicle short axis performance testing device according to claim 1, characterized in that: A circular groove (76) is further provided on the upper portion of the movable sleeve (71), and a top shaft (77) is longitudinally slidably provided in the circular groove (76). The lower end of the top shaft (77) is connected to the inner lower side of the circular groove (76) via a third spring (771). A contact switch (8) corresponding to the top shaft (77) is provided on one side of the fixed support (5). The upper end of the top shaft (77) extends out of the circular groove (76). When the top shaft (77) contacts the contact switch (8), the power supply of the test motor (3) is turned off.

3. The short-axle performance testing device for new energy vehicles according to claim 1, characterized in that: The torque adjustment mechanism (75) includes a fixed seat (751) arranged on one side of the fixed support (5), a limit shaft (752) is provided on the upper part of the fixed seat (751), the limit shaft (752) slides longitudinally through the limit sleeve (74), and a slide seat (753) is provided on the outer longitudinal sliding sleeve of the upper end of the limit shaft (752), and an open groove is also provided on one side of the fixed support (5). The torque adjustment mechanism (75) also includes a servo motor (755) arranged in the open groove, the output shaft of the servo motor (755) is connected to a screw (756), and the end of the slide seat (753) away from the limit shaft (752) is screwed to the outside of the screw (756) through a thread.

4. The short-axle performance testing device for new energy vehicles according to claim 1, characterized in that: The rack mechanism (73) comprises a limiting shell (731), a rack plate (732) being laterally slidably mounted in the limiting shell (731), a side of the rack plate (732) having a tooth block extending out of the limiting shell (731), and an iron plate (733) being provided on a side of the rack plate (732) away from the tooth block, and an electromagnet (734) being provided on the inner side of the limiting shell (731).

5. A new energy vehicle short-axle performance testing device according to claim 4, characterized in that: The two ends of the rack plate (732) are connected to the inner side of the limiting shell (731) via a first spring (735). The suction force of the electromagnet (734) on the iron plate (733) is greater than the elastic force of the first spring (735). When the first spring (735) is in a reset state, the rack plate (732) is meshed with the driving gear (72). When the electromagnet (734) adsorbs the iron plate (733), there is no meshing between the rack plate (732) and the driving gear (72).

6. The short-axle performance testing device for new energy vehicles according to claim 1, characterized in that: The wear-resistant test mechanism (9) includes a barrel cover (91), the barrel cover (91) and the movable three-disc clamping claw (4) are located on the same central axis, a wear-resistant test auxiliary component (92) is provided at the bottom of the barrel cover (91), and moving blocks (93) are inserted and slidably interlaced on both sides of the barrel cover (91), and a sanding plate (94) is provided on one side of the two moving blocks (93) located inside the barrel cover (91) for rubbing the short shaft, and convex plates (95) are provided on the two edges of the other side of the moving blocks (93), and the convex plates (95) are connected to the barrel cover (91) by a fourth spring (96), and a bolt rod (97) is rotatably provided on the upper part of the barrel cover (91), and a concave seat (98) is screwed on the outside of the bolt rod (97) by a thread, and the two ends of the concave seat (98) are respectively located on one side of the two moving blocks (93).

7. A new energy vehicle short-axle performance testing device according to claim 6, characterized in that: Both sides of the inner portion of the concave seat (98) are provided with inclined surfaces (99). When the concave seat (98) moves downward, the inclined surfaces (99) squeeze the moving block (93), causing the sanding plate (94) to contact the short shaft, thereby achieving friction of short shafts of different diameters.

8. The short-axle performance testing device for new energy vehicles according to claim 6, characterized in that: The wear test auxiliary component (92) includes an L-shaped shaft (921) connected to the bottom of the barrel cover (91) and a slave bevel gear (922) fixedly sleeved on the outside of the fixed three-plate claw (6); a limit seat (923) is provided on a side of the fixed support (5) close to the movable support (2); a main bevel gear (924) is rotatably provided at the bottom of the limit seat (923); the main bevel gear (924) is meshed with the slave bevel gear (922); one end of the L-shaped shaft (921) away from the barrel cover (91) slides transversely through a side of the fixed support (5); a connecting rod (925) is hinged at the lower edge of the main bevel gear (924); the other end of the connecting rod (925) is hinged to the upper side of the L-shaped shaft (921).

9. The performance testing method of a new energy vehicle short-axle performance testing device according to claim 2, characterized in that: The following steps are involved: S1. Fix the short shaft to be tested to the movable three-plate claw (4), then the screw slide (10) drives the movable support (2) to move, so that the short shaft passes through the barrel cover (91) and is fixed on the fixed three-plate claw (6), then the test motor (3) drives the movable three-plate claw (4) to rotate, the movable three-plate claw (4) drives the short shaft to rotate, the short shaft will drive the fixed three-plate claw (6) to rotate, the fixed three-plate claw (6) drives the drive gear (72) to rotate, the drive gear (72) The rack mechanism (73) meshing with the rack mechanism (73) is driven to move longitudinally, so that the rack mechanism (73) moves upward, and the rack mechanism (73) drives the movable sleeve (71) to move upward. When the top shaft (77) contacts the contact switch (8), the power supply of the test motor (3) is turned off. When the top shaft (77) is tested from the position of the contact switch (8), the speed of the short shaft can be tested by the speed sensor (78), so that the torque of the short shaft can be known. S2, the screw (756) is driven to rotate by the servo motor (755), and the screw (756) drives the slide (753) to move longitudinally, so that the slide (753) compresses or stretches the second spring (754), changes the load condition of the short shaft, and when the second spring (754) is compressed to the required position, the pressure generated by the second spring (754) on the limit sleeve (74) becomes larger, so that the speed of the rack mechanism (73) is slowed down during displacement, thereby slowing down the speed of the short shaft, and testing the torque of the short shaft when the load is increased. Conversely, when the second spring (754) is stretched to the required position, the speed of the short shaft becomes faster, and testing the torque of the short shaft when the load is reduced; S3. When the wear resistance of the short shaft needs to be tested, the bolt rod (97) is rotated to drive the concave seat (98) downward. The inclined surfaces (99) on both sides of the concave seat (98) will squeeze the moving block (93). Under the elasticity of the fourth spring (96), the two moving blocks (93) will move closer to each other, so that the sanding plate (94) on the moving block (93) contacts the short shaft. After contact, when the test motor (3) drives the three-disc claw (4) to drive the short shaft to rotate, the sanding plate (94) will rub the short shaft to test the wear resistance of the short shaft. Performance, when the short shaft rotates, it drives the fixed three-plate claw (6) to rotate, the fixed three-plate claw (6) causes the slave bevel gear (922) to rotate, the slave bevel gear (922) drives the main bevel gear (924) meshing with it to rotate, the main bevel gear (924) drives the connecting rod (925) to do eccentric motion, thereby driving the L-shaped shaft (921) to continuously move back and forth, and then the barrel cover (91) to continuously move back and forth, axially rubbing the short shaft, realizing the integration of rotational friction and axial friction, and better testing the wear resistance of the short shaft; S4. When the torque test and the wear test do not need to be performed simultaneously, the power supply of the electromagnet (734) is turned on, and the electromagnet (734) will adsorb the iron plate (733), so that the rack plate (732) leaves the driving gear (72). In this way, during the friction test, the driving gear (72) will not drive the rack mechanism (73) to move, and thus the torque test will not be performed on the short shaft.

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