Centering device and electric drive assembly bench test system

Abstract

The utility model relates to a centering device and an electric drive assembly bench test system, the centering device comprises a clamping mechanism and a positioning light beam emitter, the clamping mechanism comprises a plurality of clamping pieces, and the plurality of clamping pieces are arranged at equal intervals along the circumferential direction of the clamping mechanism; the clamping mechanism can be synchronously close to or far away from the rotating center of the clamping mechanism in the radial direction; and the positioning light beam emitter is arranged at the rotating center of the clamping mechanism. According to the technical scheme, the efficiency and the precision of centering operation before an electric drive assembly test are improved, the reliability of a test result is further improved, the clamping pieces of the clamping mechanism synchronously move in the radial direction, output flanges of various specifications can be adapted, and a universal solution is provided for different test platforms.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of electric drive assembly testing, and particularly relates to a centering device and an electric drive assembly bench test system. BACKGROUND

[0002] Before electric drive assembly bench testing, the electric drive assembly half shaft axis needs to be adjusted to be coaxial with the dynamometer output end axis, otherwise the test results may be deviated due to the swing of the transmission shaft during the test. Different from motor testing centering, the electric drive assembly and the dynamometer are connected through the half shaft, and the centering requirement is relatively loose, and the precise and expensive centering equipment used in motor testing centering is usually not used, but manual centering is usually used, which is time-consuming and the centering effect is not ideal. CONTENT OF THE UTILITY MODEL

[0003] To overcome the problems in the related art, the present disclosure provides a centering device and an electric drive assembly bench test system.

[0004] According to a first aspect of the embodiments of the present disclosure, a centering device is provided, which is suitable for electric drive assembly bench testing, and includes a clamping mechanism and a positioning light beam emitter, wherein: the clamping mechanism includes a plurality of clamping pieces, the plurality of clamping pieces are arranged at equal intervals along the circumference of the clamping mechanism, and are configured to be able to synchronously approach or move away from the rotation center of the clamping mechanism along the radial direction; and the positioning light beam emitter is arranged at the rotation center of the clamping mechanism.

[0005] Optionally, the positioning light beam emitter includes a laser emitter or an infrared light emitter.

[0006] Optionally, the clamping mechanism further includes: a disc-shaped mechanism body and a transmission structure arranged in the mechanism body, wherein: the mechanism body is provided with a plurality of sliding grooves at equal intervals along the circumference, the sliding grooves extend along the radial direction of the mechanism body, and the clamping pieces are slidably arranged in the sliding grooves; and the transmission structure can be operated to drive the clamping pieces to slide in the sliding grooves.

[0007] Optionally, the transmission structure includes a transmission gear ring and a bevel gear, wherein: one side end face of the transmission gear ring is provided with a bevel gear for transmission cooperation with the bevel gear, the other side end face of the transmission gear ring is provided with a spiral groove, the clamping piece is provided with a sliding tooth matched with the spiral groove, the outer circumferential surface of the mechanism body is provided with a insertion hole for a manual rocker to pass through, and the position of the bevel gear corresponds to the insertion hole.

[0008] Optionally, the clamping mechanism is further provided with a display screen, and the display screen is used to display the ranging value of the positioning light beam emitter.

[0009] According to a second aspect of the embodiments of the present disclosure, an electric drive assembly bench test system is provided, comprising an electric drive assembly, a dynamometer and a centering device, the dynamometer and the electric drive assembly are spaced and oppositely arranged, the centering device is any one of the centering devices described above, wherein the centering device is detachably connected with the output end of the dynamometer and coaxially outputs with the output end of the dynamometer.

[0010] Optionally, the output end of the dynamometer is provided with an output flange, and the centering device is connected with the output flange and coaxially outputs with the output flange.

[0011] Optionally, the electric drive assembly comprises a speed reducer, the output end of the speed reducer is provided with a dustproof cover, and the light beam emitted by the positioning light beam emitter is focused on the center of the dustproof cover at the centering position.

[0012] Optionally, the electric drive assembly bench test system further comprises a sliding table, the sliding table is provided with a sliding rail capable of sliding in the horizontal direction, and the electric drive assembly is arranged on the sliding rail.

[0013] Optionally, the dynamometer is provided with two, and the two dynamometers are arranged on the two sides of the electric drive assembly respectively.

[0014] The technical scheme provided by the embodiments of the present disclosure can include the following beneficial effects: the centering device provided by the present disclosure comprises a clamping mechanism and a positioning light beam emitter, wherein the self-centering function of the clamping mechanism can ensure that the rotation centers of the clamping mechanism and the output end of the dynamometer are consistent after the clamping mechanism is connected with the output end of the dynamometer; the positioning light beam emitter is arranged at the rotation center of the clamping mechanism, so that when the position of the electric drive assembly is adjusted to the center of the light beam focused on the output end of the electric drive assembly, the output end of the dynamometer and the output end of the electric drive assembly are coaxial, and the centering operation is completed. The centering device provided by the present disclosure is beneficial to improving the efficiency and accuracy of the centering operation before the electric drive assembly test, thereby improving the reliability of the test results, and by synchronously moving the clamping pieces of the clamping mechanism along the radial direction, the centering device can also be adapted to output flanges of various specifications, thereby providing a universal solution for different test platforms. In addition, compared with high-precision equipment used for motor testing, the clamping mechanism and the positioning light beam emitter have lower cost, which is also beneficial to cost saving.

[0015] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0016] The drawings incorporated into the specification and forming a part thereof, illustrate embodiments consistent with the present disclosure and, together with the specification, serve to explain the principles of the present disclosure.

[0017] Figure 1 is a structural schematic diagram of a centering device according to an exemplary embodiment.

[0018] Figure 2 is Figure 1 is a structural schematic diagram of a centering device according to an exemplary embodiment.

[0019] Figure 3 is Figure 1 is a structural schematic diagram of a centering device according to an exemplary embodiment.

[0020] Figure 4 is a schematic diagram of an electric drive assembly bench test system according to an exemplary embodiment.

[0021] BRIEF DESCRIPTION OF DRAWINGS

[0022] 1 - clamping mechanism, 11 - clamping piece, 12 - mechanism body, 121 - front cover plate, 122 - rear cover plate, 123 - sliding groove, 124 - insertion hole, 13 - transmission structure, 131 - transmission gear ring, 132 - bevel gear, 14 - display screen, 2 - positioning light beam emitter, 100 - centering device, 200 - dynamometer, 210 - output flange, 300 - electric drive assembly, 400 - sliding table. DETAILED DESCRIPTION

[0023] The exemplary embodiments will be described in detail herein with reference to the attached drawings. The following description is made with reference to the accompanying drawings in which like reference numerals refer to like elements in the several figures. The following description of exemplary embodiments is not representative of all embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0024] It should be noted that all actions of obtaining signals, information or data in the present disclosure are carried out in compliance with the corresponding data protection regulations and policies of the country where the device is located, and with the authorization given by the corresponding device owner.

[0025] As Figures 1 to 3As shown, the present disclosure exemplarily provides a centering device 100 suitable for electric drive assembly bench test. The test of electric drive assembly includes but is not limited to electric drive assembly performance test, working state test of electric drive system under different transmission configurations, adaptation and calibration of electric drive assembly and dynamometer connection, and electric drive assembly NVH and EMC performance test, etc. The electric drive assembly further includes a controller and a reducer on the basis of the motor. Different from the individual test of the motor, the electric drive assembly has certain tolerance due to the system itself, and the test purpose is mainly concerned about the cooperative working capacity of the system, etc. Therefore, the centering requirement is more relaxed than the motor test. This relaxation mainly reflects that the precise and expensive centering equipment is usually used in the motor test, while the centering of the electric drive assembly in the prior art is mainly manually centered by visual means, which is time-consuming and has poor centering effect.

[0026] The present disclosure proposes a centering device 100 suitable for electric drive assembly bench test, which comprises a clamping mechanism 1 and a positioning light beam emitter 2. The clamping mechanism 1 comprises a plurality of clamping pieces 11, which are arranged at equal intervals along the circumference of the clamping mechanism 1 and are configured to synchronously approach or move away from the rotation center of the clamping mechanism 1 in the radial direction. Figure 1 The clamping mechanism 1 shown in the figure comprises three clamping pieces 11, i.e. the clamping mechanism 1 can be a three-jaw self-centering chuck. The principle is that the clamping mechanism 1 adjusts the position of the clamped part through the synchronous movement of the three clamping pieces 11, so as to achieve the purpose of automatic centering. The clamping mechanism 1 is usually constructed as a disc as a whole, and its rotation center is the center of the clamping mechanism 1. The positioning light beam emitter 2 is arranged at the rotation center of the clamping mechanism 1. The positioning light beam emitter 2 can be a laser emitter or an infrared light emitter, etc. which can emit visible light with a focal point.

[0027] After the clamping mechanism 1 is installed at the output end of the dynamometer 200, the rotation center of the clamping mechanism 1 is coaxial with the rotation center of the output end of the dynamometer 200. Since the positioning light beam emitter 2 is arranged at the rotation center of the clamping mechanism 1, the focal point of the light beam emitted thereby is also coaxial with the rotation center of the output end of the dynamometer 200. By adjusting the position of the electric drive assembly 300, the light beam emitted by the positioning light beam emitter 2 is focused on the center of the output end of the electric drive assembly 300. At this time, the output end of the dynamometer 200 and the output end of the electric drive assembly 300 are coaxial, and the centering operation is completed.

[0028] The following illustrates the steps of the centering operation of the centering device 100 provided by the present disclosure. The clamping mechanism 1 is clamped and fixed on the output end of the dynamometer 200, for example, on the output flange 210 of the dynamometer 200; the position of the electric drive assembly 300 is coarsely adjusted, the positioning light beam emitter 2 is turned on, and the light beam is focused on the approximate range of the output end of the electric drive assembly 300; the position of the electric drive assembly 300 is finely adjusted until the light beam is focused on the center position of the output end of the electric drive assembly 300, and the centering operation is completed; the positioning light beam emitter 2 is turned off and the clamping mechanism 1 is removed, the dynamometer 200 is adjusted axially, and the half shaft is installed until the two ends of the half shaft are correctly connected with the dynamometer 200 and the electric drive assembly 300, respectively.

[0029] By the above technical solution, the centering device 100 provided by the present disclosure is beneficial to improving the efficiency and accuracy of the centering operation of the electric drive assembly 300 before testing, thereby improving the reliability of the test results, and by synchronously moving the clamping pieces 11 of the clamping mechanism 1 along the radial direction, the clamping mechanism 1 can be adapted to output flanges of various specifications, providing a universal solution for different test platforms, and in addition, compared with high-precision equipment used for motor testing, the clamping mechanism 1 and the positioning light beam emitter 2 have lower cost, which is also beneficial to cost saving.

[0030] The synchronous movement of the plurality of clamping pieces 11 along the radial direction of the clamping mechanism 1 can be achieved in various ways. For example, Figure 3 As shown in some embodiments, the clamping mechanism 1 can further include a disc-shaped mechanism body 12 and a transmission structure 13 arranged in the mechanism body 12. The mechanism body 12 is provided with a plurality of sliding grooves 123 at equal intervals along the circumferential direction, the sliding grooves 123 extend along the radial direction of the mechanism body 12, and the clamping pieces 11 are slidably arranged in the sliding grooves 123; the transmission structure 13 can be operated to drive the clamping pieces 11 to slide in the sliding grooves 123. The mechanism body 12 can be designed in a split type, i.e., including a front cover plate 121 and a rear cover plate 122, and the front cover plate 121 and the rear cover plate 122 are buckled to form a space for accommodating the transmission structure 13. The sliding grooves 123 are arranged on the front cover plate 121, the positioning light beam emitter 2 is arranged on the rear cover plate 122, and the clamping pieces 11 and the positioning light beam emitter 2 are located on the two sides of the disc surface of the clamping mechanism 1, respectively.

[0031] For example, Figure 3As shown, the transmission structure 13 can include a transmission ring gear 131 and a bevel gear 132, wherein one side end surface of the transmission ring gear 131 is provided with bevel gears for transmission cooperation with the bevel gear 132, and the other side end surface of the transmission ring gear 131 is provided with a spiral groove, the clamping piece 11 is provided with a sliding tooth cooperating with the spiral groove, the outer circumferential surface of the mechanism body 12 is provided with a insertion hole 124 for the manual rocker to pass through, and the position of the bevel gear 132 corresponds to the insertion hole 124. The bevel gear 132 can be driven by the manual rocker, thereby driving the transmission ring gear 131 to rotate. The cooperation between the transmission ring gear 131 and the clamping piece 11 is similar to the screw-nut transmission structure, specifically, the transmission ring gear 131 and the clamping piece 11 are threadedly engaged, and since the sliding groove 123 limits the circumferential movement of the clamping piece 11, the clamping piece 11 can only move radially along the sliding groove 123.

[0032] In some embodiments, as Figure 2 As shown, the clamping mechanism 1 is further provided with a display screen 14, which is used to display the ranging value of the positioning light beam emitter 2. The positioning light beam emitter 2 can be a laser range finder or an infrared range finder, for example. According to the displayed ranging value, the horizontal distance between the electric drive assembly 300 and the dynamometer 200 can be adjusted to improve the installation efficiency of the half shaft. The clamping mechanism 1 can be further provided with a circuit board for controlling the display screen and a battery compartment for supplying power to the display screen 14.

[0033] According to a second aspect of the embodiments of the present disclosure, as Figure 4 As shown, an electric drive assembly bench test system is also provided, which includes an electric drive assembly 300, a dynamometer 200 and a centering device 100. The dynamometer 200 and the electric drive assembly 300 are spaced and oppositely arranged, and the centering device 100 is any one of the above-mentioned centering devices and has all the beneficial effects thereof. The centering device 100 is detachably connected with the output end of the dynamometer 200 and coaxially outputs with the output end of the dynamometer 200. In some embodiments, the electric drive assembly 300 includes a speed reducer, the output end of the speed reducer is provided with a dustproof plug, and the light beam emitted by the positioning light beam emitter 2 is focused on the center of the dustproof plug at the centering position.

[0034] In some embodiments, the output end of the dynamometer 200 is provided with an output flange 210, the centering device 100 is connected with the output flange 210 and coaxially outputs with the output flange 210. The output flange 210 may, for example, be a torque flange, which can monitor the output rotation speed. Considering that the specifications of the output flanges 210 adopted by different test platforms are different, and the connection mode of the flange in the prior art is usually bolt connection, which leads to poor adaptability to different platforms. The centering device 100 provided in the present disclosure is connected with the output flange 210 through the clamping mechanism 1, which can adapt to output flanges 210 of different specifications by adjusting the position of the clamping piece 11, and has high universality.

[0035] The electric drive assembly bench test system provided in the present disclosure can further include a sliding table 400, the sliding table 400 is provided with a sliding rail capable of sliding in the horizontal direction, and the electric drive assembly 300 is arranged on the sliding rail. By sliding the electric drive assembly 300 on the sliding rail, the distance between the electric drive assembly 300 and the dynamometer 200 can be adjusted to a suitable distance for installing the half shaft. In addition, the dynamometer 200 can be provided with two, and the two dynamometers 200 are arranged on the two sides of the electric drive assembly 300 respectively, so that the two sides of the electric drive assembly 300 can be tested at the same time to improve the efficiency of the test.

[0036] In the above detailed description, reference is made to the accompanying drawings, which show by way of illustration specific aspects in which the disclosure can be practiced. In this regard, reference is made to the orientation of the described figures in using terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and like terms to indicate directional orientation or positional relationships. Because components of the described devices can be positioned in a number of different orientations, the directional terms are used for purposes of illustration and not limitation. It is to be understood that other aspects can be utilized and structural or logical changes can be made without departing from the concepts of the present disclosure. The following detailed description, therefore, is not to be taken in a limiting sense.

[0037] It should be understood that the features of the various aspects of the disclosure described herein can be combined with each other, unless specifically noted otherwise. As used in this document, the term "and / or" includes any one of the associated listed items, as well as any combination of any two or more of the associated listed items; similarly, "at least one of" includes any one of the associated listed items, as well as any combination of any two or more of the associated listed items.

[0038] It should be understood that, unless there appears to be a specific reason for doing so, the terms "connected," "joined," "mounted," "attached," "connected," "fixed" and like terms as used in the embodiments of the present disclosure are to be construed as being broad terms, for example, they can be fixed connections, or detachable connections, or integral; they can be mechanical connections, or electrical connections, or communication with each other; they can be direct connections, or indirect connections through an intermediate medium, or the internal connection of two elements, or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this article can be understood according to the specific circumstances.

[0039] In addition, the word "over" as used in the context of a component, element, or material layer formed "over" or located "over" a surface in the present disclosure can be used to mean that the component, element, or material layer is positioned (e.g., placed, formed, deposited, etc.) "indirectly" on the surface such that one or more additional components, elements, or layers are arranged between the surface and the component, element, or material layer. However, the word "over" as used in the context of a component, element, or material layer formed "over" or located "over" a surface can also optionally have the specific meaning of the component, element, or material layer being positioned (e.g., placed, formed, deposited, etc.) "directly" on the surface, e.g., in direct contact with the surface.

[0040] Although terms such as "first", "second" and "third" can be used herein to describe various components, parts, regions, layers or segments, these components, parts, regions, layers or segments are not limited to these terms. Instead, these terms are only used to distinguish one component, part, region, layer or segment from another component, part, region, layer or segment. Therefore, the first component, part, region, layer or segment mentioned in the examples described herein can also be referred to as the second component, part, region, layer or segment without departing from the teachings of the examples. In addition, the terms "first", "second" are only for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description herein, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0041] It will be understood that the spatially relative terms herein, such as "above", "upper", "below", and "lower", are intended to be interpreted as the relative position of one element to another element as shown in the figures. Such a spatially relative terms are intended to encompass different orientations of the device in use or operation, in addition to the orientations depicted in the figures. For example, if a device in the figures is turned over, so that the element which is described as above other elements would now be below those elements, the term "above" can encompass both of those orientations. Accordingly, the spatially relative terms are intended to encompass the various orientations of the device in use or operation, and terms such as "above", "below", "upper", and "lower" are used herein for the purpose of illustration and are not intended to be construed as limiting.

Claims

1. A centering device suitable for use in an electric drive assembly bench test, characterized in that, The clamping mechanism comprises a plurality of clamping members, which are arranged equidistantly along the circumference of the clamping mechanism and are configured to be synchronously moved radially towards or away from the center of rotation of the clamping mechanism; and the positioning light beam emitter is arranged at the center of rotation of the clamping mechanism.

2. The centering device of claim 1, wherein, The positioning light beam emitter comprises a laser emitter or an infrared light emitter.

3. The centering device of claim 1, wherein, The clamping mechanism further comprises a disc-shaped mechanism body and a transmission structure arranged in the mechanism body, wherein the mechanism body is provided with a plurality of sliding grooves equidistantly along the circumference, the sliding grooves extend along the radial direction of the mechanism body, and the clamping members are slidably arranged in the sliding grooves; and the transmission structure can be operated to drive the clamping members to slide in the sliding grooves.

4. The centering device of claim 3, wherein, The transmission structure comprises a transmission ring gear and a bevel gear, wherein one side end surface of the transmission ring gear is provided with bevel gears for transmission matching with the bevel gear, the other side end surface of the transmission ring gear is provided with a helical groove, the clamping member is provided with a sliding tooth for matching with the helical groove, the outer circumferential surface of the mechanism body is provided with a insertion hole for a manual rocker to pass through, and the position of the bevel gear corresponds to the insertion hole.

5. The centering device of claim 1, wherein, The clamping mechanism is further provided with a display screen for displaying the ranging value of the positioning light beam emitter.

6. An electric drive assembly bench test system, characterized by The electric drive assembly, the dynamometer and the centering device are arranged in a spaced and opposite manner, the centering device is the centering device according to any one of claims 1-5, and the centering device is detachably connected with the output end of the dynamometer and coaxially outputs with the output end of the dynamometer.

7. The electric drive assembly bench test system of claim 6, wherein, The output end of the dynamometer is provided with an output flange, and the centering device is connected with the output flange and coaxially outputs with the output flange.

8. The electric drive assembly bench test system of claim 6, wherein, The electric drive assembly comprises a speed reducer, the output end of the speed reducer is provided with a dustproof plug, and the light beam emitted by the positioning light beam emitter is focused on the center of the dustproof plug at the centering position.

9. The electric drive assembly bench test system of claim 6, wherein, The electric drive assembly is further provided with a sliding table, and the sliding table is provided with a sliding rail capable of sliding in the horizontal direction, and the electric drive assembly is arranged on the sliding rail.

10. The electric drive assembly bench test system of claim 6, wherein, The dynamometer is provided with two, and the two dynamometers are arranged on the two sides of the electric drive assembly, respectively. The clamping mechanism comprises a plurality of clamping members, which are arranged equidistantly along the circumference of the clamping mechanism and are configured to be synchronously moved radially towards or away from the center of rotation of the clamping mechanism; and the positioning light beam emitter is arranged at the center of rotation of the clamping mechanism. The positioning light beam emitter comprises a laser emitter or an infrared light emitter. The clamping mechanism further comprises a disc-shaped mechanism body and a transmission structure arranged in the mechanism body, wherein the mechanism body is provided with a plurality of sliding grooves equidistantly along the circumference, the sliding grooves extend along the radial direction of the mechanism body, and the clamping members are slidably arranged in the sliding grooves; and the transmission structure can be operated to drive the clamping members to slide in the sliding grooves. The transmission structure comprises a transmission ring gear and a bevel gear, wherein one side end surface of the transmission ring gear is provided with bevel gears for transmission matching with the bevel gear, the other side end surface of the transmission ring gear is provided with a helical groove, the clamping member is provided with a sliding tooth for matching with the helical groove, the outer circumferential surface of the mechanism body is provided with a insertion hole for a manual rocker to pass through, and the position of the bevel gear corresponds to the insertion hole. The clamping mechanism is further provided with a display screen for displaying the ranging value of the positioning light beam emitter. The electric drive assembly, the dynamometer and the centering device are arranged in a spaced and opposite manner, the centering device is the centering device according to any one of claims 1-5, and the centering device is detachably connected with the output end of the dynamometer and coaxially outputs with the output end of the dynamometer. The output end of the dynamometer is provided with an output flange, and the centering device is connected with the output flange and coaxially outputs with the output flange. The electric drive assembly comprises a speed reducer, the output end of the speed reducer is provided with a dustproof plug, and the light beam emitted by the positioning light beam emitter is focused on the center of the dustproof plug at the centering position. The electric drive assembly is further provided with a sliding table, and the sliding table is provided with a sliding rail capable of sliding in the horizontal direction, and the electric drive assembly is arranged on the sliding rail. The dynamometer is provided with two, and the two dynamometers are arranged on the two sides of the electric drive assembly, respectively.

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