Locked-rotor device applied to new energy automobile motor test

By using a hydraulically driven locking structure and a return spring design, the problems of insufficient braking force and poor return reliability are solved, achieving adaptability to high torque stall and high speed testing, and the structure is compact.

CN223637673UActive Publication Date: 2025-12-05SHANGHAI AIFU YIWEI TESTING EQUIP CO LTD
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Patent Information

Application Number
CN202423085310.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-12
Publication Date
2025-12-05
Estimated Expiration
2034-12-12

AI Technical Summary

Technical Problem

Traditional stall devices have insufficient braking force, resulting in a non-compact structure that is difficult to adapt to high-speed testing requirements, and poor reset reliability.

Method used

The locking structure is hydraulically driven. The hydraulic sliding body compresses the locking block to generate radial locking force, which is combined with the return spring to achieve reliable reset. The structure is compact and suitable for high-speed testing.

Benefits of technology

It achieves high torque stall, reduces rotational inertia, is suitable for high-speed testing, has a compact structure, and high reset reliability.

✦ Generated by Eureka AI based on patent content.

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    Figure CN223637673U_ABST
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Abstract

The utility model provides a locked-rotor device applied to a new energy automobile motor test. The locked-rotor device comprises a locked-rotor device shell, a locking rotor and a hydraulic driving assembly, the locking rotor is arranged on the locked-rotor device shell, the locked-rotor device shell is used for being fixed on a dynamometer shell, and the locking rotor is used for being connected with a dynamometer output shaft; a locking block is arranged on the periphery of the locking rotor; a hydraulic sliding body is arranged in the locked-rotor device shell, and the hydraulic driving assembly can drive the hydraulic sliding body to move in the locked-rotor device shell, so that the hydraulic sliding body extrudes the locking block; before the locking block is extruded, the locking rotor can rotate on the locked-rotor device shell; when the locking block is extruded, the locking block generates radial deformation, and radial locking force is generated on the locking rotor. Hydraulic pressure is adopted as power to lock the motor shaft, a hydraulic system can provide large pressure, and large locking torque is achieved with the small size.
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Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile motor test, specifically, relate to a kind of application in new energy automobile motor test's locked-rotor device. BACKGROUND

[0002] Locked-rotor device in automobile motor test is a kind of test equipment for simulating the locked-rotor condition that motor can encounter in actual operation.Locked-rotor condition refers to the state that motor output shaft is locked, cannot normally run, which can occur when starting, parking or improper operation (such as pulling hand brake and stepping on accelerator) on certain slope section of electric vehicle.Locked-rotor characteristic is one of important indexes of driving motor performance evaluation.

[0003] Traditional locked-rotor mechanism adopts the structure of brake disc+pneumatic brake, because the braking force of pneumatic brake is small, so a brake disc with very large diameter needs to be installed on the shaft, and the brake disc with large diameter has large moment of inertia and large unbalanced mass.The utility model adopts hydraulic structure, so the diameter of brake disc is reduced, and the structure is very compact by converting axial force into locking force.

[0004] The patent document with publication number CN214953965U discloses a motor locked-rotor test tool, which adopts the following technical solution: an installation plate is arranged horizontally, at least two supporting legs are fixed to the lower surface of the installation plate, a gas cylinder is fixed to the installation plate, the piston rod of the gas cylinder penetrates through the installation plate and extends downward, the lower end of the piston rod is fixedly connected with an upper connecting plate, the lower surface of the upper connecting plate is detachably fixed with an upper pressing die, the lower surface of the upper pressing die is provided with an arc-shaped limiting groove, a lower pressing die is symmetrically arranged directly below the upper pressing die, the lower pressing die is detachably fixed to the upper surface of a lower connecting plate, and the lower surface of the lower connecting plate is fixed with a vertical telescopic mechanism. UTILITY MODEL CONTENTS

[0005] In view of the defects in the prior art, the purpose of the utility model is to provide a locked-rotor device applied to new energy automobile motor test.

[0006] According to the locked-rotor device applied to new energy automobile motor test provided by the utility model, it comprises: a locked-rotor device shell, a locking rotor and a hydraulic drive assembly.

[0007] The locking rotor is arranged on the locked-rotor device shell, the locked-rotor device shell is used for being fixed on a dynamometer shell, and the locking rotor is used for being connected with a dynamometer output shaft; locking blocks are arranged on the periphery of the locking rotor.

[0008] The hydraulic sliding body is arranged in the locking device shell, and the hydraulic drive assembly is capable of driving the hydraulic sliding body to move in the locking device shell so that the hydraulic sliding body extrudes the locking block.

[0009] Before the locking block is extruded, the locking rotor is capable of rotating on the locking device shell; when the locking block is extruded, the locking block is radially deformed to generate a radial locking force on the locking rotor.

[0010] Preferably, the moving direction of the hydraulic sliding body is the axial direction of the dynamometer output shaft.

[0011] The hydraulic sliding body is provided with a first extrusion inclined surface inclined relative to the axial direction, and the locking block is provided with a second extrusion inclined surface inclined relative to the axial direction.

[0012] The first extrusion inclined surface and the second extrusion inclined surface are in contact; when the hydraulic sliding body moves in the axial direction, the hydraulic sliding body extrudes the locking block through the first extrusion inclined surface and the second extrusion inclined surface.

[0013] Preferably, the hydraulic sliding body and the locking device shell are provided with a reset spring.

[0014] When there is no hydraulic driving force, the hydraulic sliding body is reset by the reset spring.

[0015] Preferably, the reset spring is provided in multiple.

[0016] The multiple reset springs are uniformly distributed along the circumference of the hydraulic sliding body and the locking device shell.

[0017] Preferably, the hydraulic sliding body comprises a sliding guide part and an extrusion part arranged integrally.

[0018] The connecting position of the sliding guide part and the extrusion part forms an annular stepped pushing structure, and the locking device shell is provided with an annular hydraulic oil passage corresponding to the position of the annular stepped pushing structure.

[0019] The hydraulic drive assembly drives the hydraulic sliding body to move through the annular stepped pushing structure and the annular hydraulic oil passage.

[0020] Preferably, the locking device shell is provided with a hydraulic oil inlet hole and a pressure relief hole corresponding to the position of the stepped pushing structure.

[0021] The hydraulic oil inlet hole and the pressure relief hole are in communication with the annular hydraulic oil passage.

[0022] Preferably, a first O-shaped sealing ring is arranged between the outer side wall of the extrusion part and the inner side wall of the locking device shell.

[0023] The outer side wall of the sliding guide part and the inner side wall of the locked-rotor device shell are provided with a second O-shaped sealing ring.

[0024] Preferably, the locking block is a wedge.

[0025] Preferably, the locked-rotor device shell is connected and fixed with the dynamometer shell through a first bolt.

[0026] Preferably, the locking rotor is connected and fixed with the dynamometer output shaft through a second bolt.

[0027] Compared with the prior art, the utility model has the beneficial effects that:

[0028] 1. The utility model adopts hydraulic pressure as the power source of the locking structure, drives the hydraulic sliding body through hydraulic pressure, makes the hydraulic sliding body extrude the locking block, further makes the locking block generate locking force to the locking rotor, solves the problem of insufficient locking force, makes the locked-rotor device can realize the locked-rotor demand of large torque.

[0029] 2. The utility model adopts the mode that multiple springs are evenly distributed to reset the hydraulic sliding body, solves the problems of difficult resetting of the locking device and poor resetting reliability.

[0030] 3. The utility model adopts hydraulic pressure driving, because the hydraulic pressure locking can provide higher locking force, can make the diameter and thickness size of the locking rotor very small, reduces the moment of inertia, can be suitable for the application of high-speed test.

[0031] 4. The whole device of the utility model can be installed on the dynamometer shell, makes the overall structure more compact, avoids making more supports to support the device. BRIEF DESCRIPTION OF DRAWINGS

[0032] Other features, objects and advantages of the utility model will become more apparent through reading the following detailed description of the non-restrictive embodiments with reference to the accompanying drawings:

[0033] Figure 1 It is a three-dimensional structure schematic view of the locked-rotor device applied to new energy automobile motor test;

[0034] Figure 2 It is a front view of the locked-rotor device applied to new energy automobile motor test;

[0035] Figure 3 It is Figure 2 It is a sectional view along A-A line of the locked-rotor device applied to new energy automobile motor test in the utility model;

[0036] Figure 4 It is Figure 2The application is applied to the blocking device for motor test of new energy automobile along the section view of B-B line in the figure.

[0037] The figure shows:

[0038] 1, dynamometer shell; 2, dynamometer output shaft; 3, blocking device shell; 4, hydraulic sliding body; 401, sliding guide part; 402, extrusion part; 5, locking block; 6, locking rotor; 7, reset spring; 8, first O-shaped sealing ring; 9, second O-shaped sealing ring; 10, hydraulic oil inlet hole; 11, pressure relief hole; 12, first bolt; 13, second bolt. DETAILED DESCRIPTION

[0039] The utility model will be explained in detail below in combination with specific embodiments. The following embodiments will help the person skilled in the art to further understand the utility model, but do not limit the utility model in any form. It should be pointed out that for ordinary skilled in the art, on the premise of not departing from the concept of the utility model, a number of changes and improvements can be made. These all belong to the protection scope of the utility model.

[0040] Example 1:

[0041] As Figures 1-4 shown, the embodiment provides a blocking device applied to motor test of new energy automobile, comprising: blocking device shell 3, locking rotor 6 and hydraulic drive assembly; locking rotor 6 is arranged on blocking device shell 3, blocking device shell 3 is used to be fixed on dynamometer shell 1, and locking rotor 6 is used to be connected with dynamometer output shaft 2; locking block 5 is arranged on the periphery of locking rotor 6; hydraulic sliding body 4 is arranged in blocking device shell 3, and hydraulic drive assembly can drive hydraulic sliding body 4 to move in blocking device shell 3, so that hydraulic sliding body 4 extrudes locking block 5; before locking block 5 is extruded, locking rotor 6 can rotate on blocking device shell 3; when locking block 5 is extruded, locking block 5 generates radial deformation, and radial locking force is generated on locking rotor 6. The radial deformation of locking block 5 is generated by bevel extrusion.

[0042] Locking block 5 is wedge iron. Blocking device shell 3 is connected and fixed with dynamometer shell 1 through first bolt 12. Locking rotor 6 is connected and fixed with dynamometer output shaft 2 through second bolt 13.

[0043] Reset spring 7 is arranged on hydraulic sliding body 4 and blocking device shell 3; when there is no hydraulic driving force, hydraulic sliding body 4 is reset through reset spring 7. Reset spring 7 is arranged as multiple; multiple reset springs 7 are uniformly and intervally distributed along the circumference of hydraulic sliding body 4 and blocking device shell 3.

[0044] The hydraulic sliding body 4 comprises a sliding guide part 401 and an extrusion part 402 which are integrally arranged, and a connecting position of the sliding guide part 401 and the extrusion part 402 forms an annular step pushing structure, the hydraulic locking device shell 3 is provided with an annular hydraulic oil passage corresponding to the position of the annular step pushing structure, and the hydraulic drive assembly drives the hydraulic sliding body 4 to move through the annular step pushing structure and the annular hydraulic oil passage. The moving direction of the hydraulic sliding body 4 is the axial direction of the dynamometer output shaft 2, the hydraulic sliding body 4 is provided with a first extrusion inclined surface which is inclined relative to the axial direction, the locking block 5 is provided with a second extrusion inclined surface which is inclined relative to the axial direction, the first extrusion inclined surface and the second extrusion inclined surface are in contact, and the hydraulic sliding body 4 extrudes the locking block 5 through the first extrusion inclined surface and the second extrusion inclined surface when the hydraulic sliding body 4 moves in the axial direction. The first extrusion inclined surface is arranged on the extrusion part 402.

[0045] The hydraulic locking device shell 3 is provided with a hydraulic oil inlet hole 10 and a pressure relief hole 11 corresponding to the position of the step pushing structure, and the hydraulic oil inlet hole 10 and the pressure relief hole 11 are in communication with the annular hydraulic oil passage. The outer side wall of the extrusion part 402 and the inner side wall of the hydraulic locking device shell 3 are provided with a first O-shaped sealing ring 8, and the outer side wall of the sliding guide part 401 and the inner side wall of the hydraulic locking device shell 3 are provided with a second O-shaped sealing ring 9.

[0046] Working principle:

[0047] The hydraulic locking device shell 3 is fixed on the dynamometer shell 1 by bolts, and the locking rotor 6 is connected to the dynamometer output shaft 2. The hydraulic sliding body 4 moves forward under the action of hydraulic oil pressure, pushes the locking block 5 to deform axially through the inclined surface, so that the locking block 5 contacts, extrudes and generates friction with the locking rotor 6, thereby preventing the rotation of the dynamometer shaft and the entire shafting, and playing the role of locking rotation.

[0048] When locking is not needed, the hydraulic station removes the pressure in the system, and the reset spring 7 pushes the hydraulic sliding body 4 back to the original position, at this time the locking block 5 returns to the shape before deformation, and no longer contacts with the locking rotor 6, and the dynamometer shaft and the entire shafting can rotate freely at this time.

[0049] Among them, the first O-shaped sealing ring 8 and the second O-shaped sealing ring 9 are used for sealing the high-pressure hydraulic oil, the hydraulic oil inlet hole 10 is used for pressure supply, and the pressure relief hole 11 is used for manual pressure relief.

[0050] In this embodiment, hydraulic pressure is used as the power to lock the motor shaft, and the hydraulic system can provide a large pressure to realize a large locking torque with a small volume.

[0051] In this embodiment, the hydraulic sliding body is pushed forward and backward to slide, and the linear force is converted into the rotary locking force through the inclined surface, and the structure is compact.

[0052] After the hydraulic pressure of the embodiment is unloaded, the eight springs distributed uniformly in the circumference reset, which is reliable and avoids the error of the shaft still being clamped after unlocking.

[0053] The hydraulic oil of the embodiment pushes the sliding body to slide, and the pushing area is an annular belt, and the force is uniform.

[0054] The whole set of device of the embodiment is installed on the housing of the dynamometer, which is compact and integrated.

[0055] The utility model discloses a hydraulic pressure as power locking motor shaft, and the hydraulic system can provide great pressure, and realizes big locking torque with small volume.

[0056] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like 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 device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0057] The specific embodiments of the utility model have been described above. It should be understood that the utility model is not limited to the specific implementation described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essential content of the utility model. In the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A locked-rotor device applied to a new energy vehicle motor test, characterized in that, The application relates to a locking device for a dynamometer, which comprises: a locking device shell (3), a locking rotor (6) and a hydraulic drive assembly; the locking rotor (6) is arranged on the locking device shell (3), the locking device shell (3) is used for being fixed on a dynamometer shell (1), and the locking rotor (6) is used for being connected with a dynamometer output shaft (2); the locking rotor (6) is peripherally provided with a locking block (5); a hydraulic sliding body (4) is arranged in the locking device shell (3), and the hydraulic drive assembly can drive the hydraulic sliding body (4) to move in the locking device shell (3), so that the hydraulic sliding body (4) extrudes the locking block (5); before the locking block (5) is extruded, the locking rotor (6) can rotate on the locking device shell (3); when the locking block (5) is extruded, the locking block (5) is radially deformed to generate a radial locking force on the locking rotor (6).

2. The locked-rotor device for use in testing a motor of a new energy vehicle according to claim 1, wherein, The moving direction of the hydraulic sliding body (4) is the axial direction of the dynamometer output shaft (2); the hydraulic sliding body (4) is provided with a first extrusion inclined surface which is inclined relative to the axial direction, and the locking block (5) is provided with a second extrusion inclined surface which is inclined relative to the axial direction; the first extrusion inclined surface and the second extrusion inclined surface are in contact; when the hydraulic sliding body (4) moves along the axial direction, the hydraulic sliding body (4) extrudes the locking block (5) through the first extrusion inclined surface and the second extrusion inclined surface.

3. The locked-rotor device for use in testing a motor of a new energy vehicle according to claim 1, wherein, the hydraulic sliding body (4) and the locking device shell (3) are provided with a reset spring (7); when there is no hydraulic driving force, the hydraulic sliding body (4) is reset through the reset spring (7).

4. The locked-rotor device for use in testing a motor of a new energy vehicle according to claim 3, characterized in that, the reset spring (7) is provided in a plurality of forms; the plurality of reset springs (7) are uniformly distributed along the circumference of the hydraulic sliding body (4) and the locking device shell (3).

5. The locked-rotor device for use in testing a motor for a new energy vehicle according to claim 1, wherein, the hydraulic sliding body (4) comprises a sliding guide part (401) and an extrusion part (402) which are integrally arranged; the connecting position of the sliding guide part (401) and the extrusion part (402) forms an annular stepped pushing structure, and the locking device shell (3) is provided with an annular hydraulic oil passage corresponding to the position of the annular stepped pushing structure; the hydraulic drive assembly drives the hydraulic sliding body (4) to move through the annular stepped pushing structure and the annular hydraulic oil passage.

6. The locked-rotor device for use in testing a motor for a new energy vehicle according to claim 5, wherein, the locking device shell (3) is provided with a hydraulic oil inlet hole (10) and a pressure relief hole (11) corresponding to the position of the stepped pushing structure; the hydraulic oil inlet hole (10) and the pressure relief hole (11) are in communication with the annular hydraulic oil passage.

7. The locked-rotor device for use in testing a motor of a new energy vehicle according to claim 6, characterized in that, a first O-shaped sealing ring (8) is arranged between the outer side wall of the extrusion part (402) and the inner side wall of the locking device shell (3); a second O-shaped sealing ring (9) is arranged between the outer side wall of the sliding guide part (401) and the inner side wall of the locking device shell (3).

8. The locked-rotor device for use in testing a motor for a new energy vehicle according to claim 1, wherein, the locking block (5) is a wedge.

9. The locked-rotor device for use in testing a motor for a new energy vehicle according to claim 1, wherein, the locking device shell (3) is connected and fixed with the dynamometer shell (1) through a first bolt (12).

10. The locked-rotor device for use in testing a motor for a new energy vehicle according to claim 1, wherein, The locking rotor (6) is connected and fixed with the dynamometer output shaft (2) through the second bolt (13).