Motor twin trawling test tool structure
By using a positioning ring and a power transmission transition spline shaft in the motor-to-motor test fixture, the stability and cost issues of the high-speed motor-to-motor test platform were solved, and vibration reduction and temperature adaptability were achieved at high speeds.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2026-03-24
AI Technical Summary
Existing high-speed motor-assisted drag test platforms suffer from insufficient stability at high speeds, have bulky and costly transmission systems, and cannot meet temperature requirements.
By using a vertically placed first and second fixture plate, combined with a positioning ring and a power transmission transition spline shaft, the bearing housing and adapter flange are eliminated, directly achieving coaxiality consistency of the spline of the test piece and simplifying the transmission system.
Reduce vibration under high-speed conditions, lower costs, meet test temperature requirements, simplify the installation process, and improve test safety and flexibility.
Smart Images
Figure CN224035574U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a motor dragging test fixture structure for a high-speed motor on a dragging test platform. Background Technology
[0002] With the rapid development of the new energy vehicle industry, there is a need for rapid and accurate testing and evaluation of newly developed vehicle drive motor system products. The speed of new energy motors is getting higher and higher, and the stability of high-speed motors on the towing test platform is currently insufficient.
[0003] The existing test bench for towing motors has two motors under test mounted on opposite worktables, connected in the middle by an adapter flange, splined shaft flange, bearing housing, and coupling. A speed and torque sensor is also installed to monitor the speed and torque signals in real time during the test. (Refer to...) Figure 1 The existing test bench structure shown in the figure illustrates the structural positions and interrelationships of the following components: T-slot cast iron platform 1, motor under test 2, gantry frame 3, first bearing 4, first adapter flange 5, coupling 6, speed and torque sensor 7, second adapter flange 8, second bearing 9, second splined shaft flange 10, gantry frame 11, motor under test 12, support base 13, support base 14, support base 15, and first splined shaft flange 16.
[0004] In other words, the existing drag test fixture structure, due to the connection of the two worktables via two bearing seats, results in an excessively long transmission spline. Under high-speed conditions, the resulting vibration can easily damage the transmission components of the high-speed motor. Moreover, the entire transmission system is too bulky and costly, and its large overall size makes it impossible to place it in a single environmental chamber to meet the customer's required temperature. Utility Model Content
[0005] The technical problem to be solved by this utility model is to overcome the above-mentioned shortcomings of the prior art and provide a motor-coupled drag test fixture structure with better stability.
[0006] The technical problem it aims to solve can be addressed through the following technical solutions.
[0007] A test fixture structure for motor-driven coupling, characterized by comprising:
[0008] A first fixture plate (23) and a second fixture plate (24) are vertically placed and securely fastened together. The two fixture plates are respectively provided with a first positioning hole (234) and a second positioning hole (244). The diameter, center, and coaxiality of the first and second positioning holes are consistent.
[0009] The first positioning ring (30), the second positioning ring (31) and the third positioning ring (32) are arranged in parallel along the axial direction, and the outer diameters of the three positioning rings are equal; among the three positioning rings, the first positioning ring (30) is at the central position, a part of the ring body of the first positioning ring (30) is clamped in the first positioning hole (234), and another part of the ring body is clamped in the second positioning hole (244); the second positioning ring (31) is attached to one side of the first positioning ring (30), a part of the ring body of the second positioning ring (31) is clamped in the second positioning hole (244); the third positioning ring (32) is attached to the other side of the first positioning ring (30), and a part of the ring body of the third positioning ring (32) is clamped in the first positioning hole (234);
[0010] The first tool plate (23) is provided with a connecting structure for connecting and positioning the first motor (21) on the first tool plate body, and the second tool plate (24) is also provided with a connecting structure for connecting and positioning the second motor (22) on the second tool plate body.
[0011] The two ends of the first tool plate (23) and the second tool plate (24) which are tightly attached together are positioned on the fixed frame or the positioning platform through the first side plate (25) and the second side plate (26) and their connecting members directly or indirectly;
[0012] The power transmission transition spline shaft (40) is further included, the shaft body of the power transmission transition spline shaft (40) penetrates the interiors of the first positioning ring, the second positioning ring and the third positioning ring, the shaft body of the power transmission transition spline shaft (40) is provided with outer splines (401) at both ends for connecting corresponding inner splines of the first motor and the second motor respectively, and the coaxialities of the outer splines at both ends are consistent.
[0013] Preferably, the first positioning ring, the second positioning ring and the third positioning ring are hollow annular structures.
[0014] Further, along the axial direction, the thickness of the first positioning ring, the second positioning ring and the third positioning ring in the stacking direction is greater than the sum of the thicknesses of the first tool plate and the second tool plate.
[0015] Further, the first tool plate and the second tool plate are vertically arranged with the first side plate and the second side plate on both sides.
[0016] Preferably, the first side plate and the second side plate are connected and positioned on the cross frame (28) through angle steels (27), and the cross frame is fixed on the T-shaped groove cast iron platform.
[0017] Preferably, the connecting structure of the first tool plate is a counterbore provided on the first tool plate, which corresponds to the threaded hole position of the first measured motor, and the first measured motor is fixed on the first tool plate through bolts; the connecting structure of the second tool plate is a counterbore provided on the second tool plate, which corresponds to the threaded hole position of the second measured motor, and the second measured motor is fixed on the second tool plate through bolts.
[0018] Preferably, the second positioning ring is clamped into the mounting connecting hole provided on the second measured motor away from the first positioning ring; and the third positioning ring is clamped into the mounting connecting hole provided on the first measured motor away from the first positioning ring.
[0019] Further, the first positioning ring is clearance-fitted with the first positioning hole of the first tool plate; the first positioning ring is clearance-fitted with the second positioning hole of the second tool plate; the second positioning ring is clearance-fitted with the second positioning hole of the second tool plate; and the third positioning ring is clearance-fitted with the first positioning hole of the first tool plate.
[0020] The motor pair drag test tool structure adopting the technical scheme has the following characteristics and beneficial effects:
[0021] 1. The connection between the bearing seat and the adapter flange is omitted, and the measured part spline coaxiality is directly achieved by the installation positioning ring and the power transmission transition spline shaft, and the related transmission parts are greatly reduced in shaking and damage under high-speed working conditions;
[0022] 2. Whether to increase the environmental bin can be selected according to the temperature condition of the test requirement;
[0023] 3. A dedicated pair of drag racks is not required, and assembly can be performed on the cross frame of the electric assembly rack. BRIEF DESCRIPTION OF DRAWINGS
[0024] Figure 1 It is a schematic view of the existing motor pair drag test tool structure and application;
[0025] Figure 2 It is a schematic view of the motor pair drag test tool structure of the utility model;
[0026] Figure 3 It is a sectional view (front view) of the motor pair drag test tool structure of the utility model;
[0027] Figure 4 It is a plan view (part) of the motor pair drag test tool structure of the utility model;
[0028] Figure 5 It is Figure 3 the enlarged schematic view of the I place;
[0029] Figure 6 Structure diagram of the power transmission transition spline shaft of the utility model;
[0030] Figure 7 Structure diagram of the first positioning ring of the utility model; Figure 6 Structure diagram of the first positioning ring of the utility model;
[0031] Figure 8 Structure diagram of the first positioning ring of the utility model;
[0032] Figure 9 Structure diagram of the first positioning ring of the utility model;
[0033] Figure 10 Structure diagram of the first positioning ring of the utility model;
[0034] In the figure: 1, T-shaped groove cast iron platform; 2, measured motor; 3, door head frame; 4, first bearing; 5, first adapter flange; 6, shaft coupling; 7, speed and torque sensor; 8, second adapter flange; 9, second bearing; 10, second spline shaft flange; 11, door head frame; 12, measured motor; 13, support seat; 14, support seat; 15, support seat; 16, first spline shaft flange;
[0035] 21, first measured motor; 211, mounting connecting hole; 22, second measured motor; 221, mounting connecting hole;
[0036] 23, first tooling plate; 231, counterbore; 232, through hole; 233, threaded hole; 234, first positioning hole; 24, second tooling plate; 244, second positioning hole;
[0037] 25, first side plate; 26, second side plate; 27, angle steel; 28, cross frame;
[0038] 30, first positioning ring; 301, inner hole; 31, second positioning ring; 311, inner hole; 32, third positioning ring; 321, inner hole;
[0039] 40, power transmission transition spline shaft; 401, external spline. DETAILED DESCRIPTION
[0040] The specific embodiments of the utility model will be further described in detail in combination with the drawings.
[0041] Referring to Figures 2 to 10 , the utility model provides a motor pair drag test tooling structure, and the specific structure and connection relationship are as follows:
[0042] The adjacent plate surfaces of the vertically placed first tooling plate 23 and the second tooling plate 24 are in close contact and are fixedly connected through a plurality of through holes (for example, the through hole 232 on the first tooling plate 23) provided on the plate surfaces and matching fastening connectors; the positioning holes (i.e., the first positioning hole 234 on the first tooling plate 23 and the second positioning hole 244 on the second tooling plate 24) for positioning the positioning rings are provided on the two tooling plates, the positioning holes on the two tooling plates are in alignment and have the same size, and a hole is processed at the center of the plate, the hole has a size that can tightly fit the first positioning ring, the second positioning ring and the third positioning ring; refer to Figure 5 Specifically, three positioning rings are provided, the first positioning ring 30 is centrally placed, a part of the ring body of the first positioning ring is positioned in the first positioning hole 234 of the first tooling plate 23, and the remaining part of the ring body of the first positioning ring is positioned in the corresponding second positioning hole 244 on the second tooling plate 24 (i.e., the second positioning hole 244 that is in alignment and matching with the first positioning hole 234); the second positioning ring 31 and the third positioning ring 32 are respectively placed on the two sides of the first positioning ring and are in close contact with the corresponding end surfaces of the first positioning ring; wherein a part of the ring body of the second positioning ring 31 is placed in the second positioning hole 244 of the second tooling plate 24, and the remaining part of the ring body of the second positioning ring is positioned in the corresponding mounting connecting hole 221 of the second motor to be measured 22. A part of the ring body of the third positioning ring 32 is placed in the first positioning hole 234 of the first tooling plate 23, and the remaining part of the ring body of the third positioning ring is positioned in the corresponding mounting connecting hole 211 of the first motor to be measured 21. The thickness of the first positioning ring, the second positioning ring and the third positioning ring in superposition is greater than the sum of the thicknesses of the first tooling plate and the second tooling plate.
[0043] Among them, the center of each tooling plate hole (i.e., the first positioning hole 234 or the second positioning hole 244) and the center of the spline of the motor to be measured need to be consistent, the plate surface is provided with a group of through holes (for example, the through hole 232) and a group of counterbores (for example, the counterbore 231), the counterbores are made to correspond to the bolt hole positions of the motor to be measured, the outermost two sides are provided with threaded holes (for example, the threaded hole 233 is provided on the side edge of the tooling plate) to facilitate the installation of the side plates (i.e., the first side plate 25 and the second side plate 26), the hole positions of the first tooling plate 23 and the second tooling plate 24 are in left-right symmetry.
[0044] The first positioning ring 30 is annular, an inner hole 301 is formed in the middle of the ring body, and the outer side end of the ring body of the first positioning ring 30 can be embedded into the first positioning hole 234 and the second positioning hole 244 provided at the center of the two tooling plates and tightly contact and ensure a gap of about 1 to 3 wires.
[0045] The second positioning ring 31 and the third positioning ring 32 are also annular, and the inner holes 311 and 321 are formed in the middle of the ring bodies, respectively. The second positioning ring 31 and the third positioning ring 32 can be embedded into the first positioning hole 234 and the second positioning hole 244 respectively formed in the center of the two tool plates and tightly adhere to and ensure the gap of 1 to 3 silk. The outer diameters of the second positioning ring 30, the second positioning ring 31 and the third positioning ring 32 are completely the same, and they are concentric circles.
[0046] The first tool plate 23 and the second tool plate 24 are positioned on the first side plate 25 and the second side plate 26 on the corresponding side through fasteners at both ends, respectively. The first side plate 25 and the second side plate 26 are fixed on the cross frame 28 through angle steels 27, respectively.
[0047] The power transmission transition spline shaft 40 is provided with outer splines 401 at both ends, and the outer splines 401 at both ends are connected with the corresponding inner splines of the first measured motor 21 and the second measured motor 22, respectively. The outer splines 401 at both ends need to be consistent in coaxiality when leaving the factory, and need to be adapted to the inner splines of the measured motor when being manufactured, tightly connected, and heat treated to ensure the hardness.
[0048] When assembled and used, the third positioning ring 32 can be first half-embedded into the first tool plate 23, and then the first measured motor 21 is fixed on the first tool plate 23. The hole position of the counterbore 231 on the first tool plate 23 corresponds to the threaded hole position of the first measured motor 21, and the first measured motor 21 is fixed on the first tool plate 23 by using bolts. This is to ensure that the center of the inner spline of the measured motor and the center of the hole of the tool plate are in the same axial direction. The second positioning ring 31 is first half-embedded into the second tool plate 24, and then the second measured motor 22 is fixed on the second tool plate 24. The hole position of the counterbore on the second tool plate 24 corresponds to the threaded hole position of the second measured motor 22, and the second measured motor 22 is fixed on the second tool plate 24 by using bolts. This is to ensure that the center of the inner spline of the measured motor and the center of the hole of the tool plate are in the same axial direction, so as to realize the consistency of the coaxiality of the measured motor and the center hole of the tool plate.
[0049] Due to the left-right symmetry of the two tooling plates, the first positioning ring 30 can be first half-embedded into the first tooling plate 23, and the remaining part is embedded into the second tooling plate 24 and tightly fitted, at this time, the centers of the openings (referring to the first positioning hole 234 and the second positioning hole 244) of the first tooling plate 23 and the second tooling plate 24 and the center of the first positioning ring are on the same axial line, the power transmission transition spline shaft 40 directly connects the inner splines of the first measured motor 21 and the second measured motor 22, and the splines (referring to the outer spline 401) at the left and right ends of the power transmission transition spline shaft can be tightly fitted with the inner splines of the measured motor, then the second tooling plate 24 is installed and fixed on the first tooling plate 21, and the combination of the bolt and the nut is used to fix the two tooling plates through the through hole on the tooling plate, so that the two tooling plates can be tightly fitted, the coaxialities of the positioning hole openings of the two tooling plates are consistent, the coaxialities of the splines on both sides of the transmission transition spline shaft are consistent, the coaxialities of the inner splines of the measured motor and the centers of the opening holes of the tooling plates are consistent, and finally the coaxialities of the inner splines of the measured motor are consistent, so that the consistency of power transmission is ensured.
[0050] The tooling plate is connected to the side plates (referring to the first side plate 25 and the second side plate 26) on both sides through bolts on the angle steel 27, and then the whole is fastened on the cross frame 28 and fixed on the T-shaped groove cast iron platform, so that the complex transmission system in the middle of the two measured motors can be removed, the distance of the connecting part is greatly shortened, the shaking under high-speed working condition is greatly reduced, the safety during testing is improved, the structure is simple, the cost is lower, the working hours required for installation are reduced, the centering of the two sides does not need to be measured by a meter, the labor cost is saved.
[0051] In addition, since the added speed torque sensor is affected by temperature changes to affect the accuracy of the collection accuracy, the sensor signal in the measured motor controller can be used, which can be placed in a single environment bin to meet the temperature conditions required by the test, save costs, and also meet the consistent environment temperature of the measured motor.
[0052] Further, the utility model can replace the customized tooling plate and power transmission transition spline shaft according to different measured parts, so as to increase the flexibility of preparation before testing.
Claims
1. A test fixture structure for motor-driven towing, characterized in that, include: A first fixture plate (23) and a second fixture plate (24) are vertically placed and securely fastened together. The two fixture plates are respectively provided with a first positioning hole (234) and a second positioning hole (244). The diameter, center, and coaxiality of the first and second positioning holes are consistent. A first positioning ring (30), a second positioning ring (31), and a third positioning ring (32) are arranged side by side along the axial direction, and the three positioning rings have the same outer diameter. Among the three positioning rings, the first positioning ring (30) is in the center position, with a part of its ring body inserted into the first positioning hole (234) and the other part of its ring body inserted into the second positioning hole (244). The second positioning ring (31) is close to one side of the first positioning ring (30), with a part of its ring body inserted into the second positioning hole (244). The third positioning ring (32) is close to the other side of the first positioning ring (30), with a part of its ring body inserted into the first positioning hole (234). The first tooling plate (23) is provided with a connection structure that facilitates connecting and positioning the first motor under test (21) on the first tooling plate body; the second tooling plate (24) is also provided with a connection structure that facilitates connecting and positioning the second motor under test (22) on the second tooling plate body. The first tooling plate (23) and the second tooling plate (24) are fastened together and their ends are directly or indirectly positioned on the fixed frame or positioning platform via the first side plate (25) and the second side plate (26) and their connecting parts. It also includes a power transmission transition spline shaft (40), the shaft of which passes through the interior of the first positioning ring, the second positioning ring and the third positioning ring. The two ends of the shaft of the power transmission transition spline shaft (40) are provided with external splines (401) for connecting the corresponding internal splines of the first and second motors under test, respectively, and the coaxiality of the external splines at both ends is consistent.
2. The motor-driven test fixture structure according to claim 1, characterized in that, The first positioning ring, the second positioning ring, and the third positioning ring are hollow circular ring structures.
3. The motor-driven test fixture structure according to claim 1 or 2, characterized in that, Along the axial direction, the thickness of the stacked first positioning ring, second positioning ring, and third positioning ring is greater than the sum of the thicknesses of the first tooling plate and the second tooling plate.
4. The motor-driven test fixture structure according to claim 1, characterized in that, The first tooling plate and the second tooling plate are arranged perpendicularly to the first side plate and the second side plate on both sides.
5. The motor-driven test fixture structure according to claim 1 or 4, characterized in that, The first side plate and the second side plate are respectively connected and positioned on the grid frame (28) by angle steel (27), and the grid frame is fixed on the T-slot cast iron platform.
6. The motor-driven test fixture structure according to claim 1, characterized in that, The first tooling plate has a connecting structure including a countersunk hole on the first tooling plate, which corresponds to the threaded hole of the first motor under test, and the first motor under test is fixed on the first tooling plate by bolts; the second tooling plate has a connecting structure including a countersunk hole on the second tooling plate, which corresponds to the threaded hole of the second motor under test, and the second motor under test is fixed on the second tooling plate by bolts.
7. The motor-driven test fixture structure according to claim 1, characterized in that, The end of the second positioning ring furthest from the first positioning ring is fitted into the mounting connection hole opened on the second motor under test; the end of the third positioning ring furthest from the first positioning ring is fitted into the mounting connection hole opened on the first motor under test.
8. The motor-driven test fixture structure according to claim 1, characterized in that, The first positioning ring is clearance-fitted with the first positioning hole of the first tooling plate; the first positioning ring is clearance-fitted with the second positioning hole of the second tooling plate; the second positioning ring is clearance-fitted with the second positioning hole of the second tooling plate; and the third positioning ring is clearance-fitted with the first positioning hole of the first tooling plate.