CN212931747U - Device for measuring starting torque drop value of speed reducing mechanism of electric power steering column - Google Patents
Device for measuring starting torque drop value of speed reducing mechanism of electric power steering column Download PDFInfo
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- CN212931747U CN212931747U CN202021711515.XU CN202021711515U CN212931747U CN 212931747 U CN212931747 U CN 212931747U CN 202021711515 U CN202021711515 U CN 202021711515U CN 212931747 U CN212931747 U CN 212931747U
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Abstract
The utility model belongs to the technical field of electric power steering column technique and specifically relates to an electric power steering column speed reduction mechanism starts moment of torsion and falls value measuring device, including rack driving motor, moment of torsion and angle sensor, torsion bar, output shaft drive head, speed reduction mechanism mounting fixture, rack driving motor's axle is connected with moment of torsion and angle sensor's one end, and moment of torsion and angle sensor's the other end is connected with the one end of torsion bar, and the output shaft drive head is installed to the other end of torsion bar, and the output shaft drive head is connected with speed reduction mechanism's center, and speed reduction mechanism installs on speed reduction mechanism mounting fixture. Compared with the prior art, the utility model designs the starting torque drop value measuring device aiming at the speed reducing mechanism, which is beneficial to the subsequent deep analysis of the problems; the motor is adopted for driving, the speed is controllable, and the measurement stability is improved; in addition, the measurement of the starting torque falling value of the speed reducing mechanisms in different projects can be realized by replacing the torsion bar, and the universality is high.
Description
Technical Field
The utility model belongs to the technical field of electric power steering column technique and specifically relates to an electric power steering column reduction gears starts moment of torsion and falls value measuring device.
Background
The electric power steering column mainly comprises an upper bearing, a lower bearing, a speed reducing mechanism and a servo motor. When the steering wheel is rotated at a slow speed of about 1Nm/s, the upper bearing, the lower bearing, the speed reducing mechanism and the servo motor of the column need to overcome static friction and start to rotate from a standstill. If the difference between the static friction torque and the dynamic friction torque of the tubular column assembly is too large, obvious torque drop can be generated in the starting process. When a driver turns, the driver needs to overcome static friction torque to rotate the steering wheel, if the torque required by continuous steering after the steering wheel is rotated is much smaller than the torque at the moment of starting to turn, namely the torque falls greatly, the initial steering stagnation of the driver can be caused, and then the driver possibly turns over, so that customer complaints are easily caused, and the product image is influenced. As a steering system supplier, the starting torque drop value of the steering column must be measured and analyzed to improve product performance and reduce customer complaints.
At present, the measurement of the drop of the starting torque of an electric power steering column has the following problems or defects: 1, a measurement object is a tubular column assembly, and cannot be subdivided into small assemblies or parts, so that the problem depth analysis is inconvenient; 2, the measurement mode is manual measurement by a test technician, and the fluctuation of the rotation speed is large, thereby influencing the stability of the measurement result.
Because the speed reducing mechanism of the steering column is influenced by the pretightening force of the worm gear and the pretightening force of the worm and the grease viscosity, the static friction of the speed reducing mechanism is far greater than that of the upper bearing, the lower bearing and the servo motor, and the speed reducing mechanism is the most main source of torque drop.
Therefore, it is necessary to design a device for measuring a drop value of a starting torque of a speed reducing mechanism of an electric power steering column, which can measure the speed reducing mechanism and improve the stability of measurement.
Disclosure of Invention
The utility model aims at overcoming the not enough of prior art, provide an electric power assisted steering tubular column reduction gears starting torque falls value measuring device, when can carrying out the measurement to reduction gears, improve measuring stability.
In order to achieve the above object, the utility model relates to an electric power steering column speed reduction mechanism starts moment of torsion and falls value measuring device, including rack driving motor, moment of torsion and angle sensor, torsion bar, output shaft drive head, speed reduction mechanism mounting fixture, rack driving motor's axle is connected with moment of torsion and angle sensor's one end, and moment of torsion and angle sensor's the other end is connected with the one end of torsion bar, and the output shaft drive head is installed to the other end of torsion bar, and the output shaft drive head is connected with speed reduction mechanism's center, and speed reduction mechanism installs on speed reduction mechanism mounting fixture.
The rack driving motor is connected with the torque and angle sensor through a first coupling.
The torque and angle sensor is connected with the torsion bar through a second coupling, a connecting flange assembly and a flexible coupling, the other end of the torque and angle sensor is connected with the second coupling, one end of the torsion bar is connected with the flexible coupling, and the second coupling is connected with the flexible coupling through the connecting flange assembly.
The connecting flange assembly comprises a first connecting flange and a second connecting flange.
The torsion bar is connected with the output shaft driving head through a third connecting flange.
And the torsion bar is connected with the third connecting flange through a via hole.
The speed reducing mechanism and the speed reducing mechanism fixing clamp are fixed by bolts.
Compared with the prior art, the utility model designs the starting torque drop value measuring device aiming at the speed reducing mechanism, which is beneficial to the subsequent deep analysis of the problems; the motor is adopted for driving, the speed is controllable, and the measurement stability is improved; in addition, the measurement of the starting torque falling value of the speed reducing mechanisms in different projects can be realized by replacing the torsion bar, and the universality is high.
Drawings
Fig. 1 is an exploded view of the present invention.
Fig. 2 is an axonometric view of the present invention.
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
Referring to fig. 1 and 2, the utility model relates to an electric power steering column speed reduction mechanism starting torque falls value measuring device, including rack driving motor, moment of torsion and angle sensor, the torsion bar, the output shaft drive head, speed reduction mechanism mounting fixture, rack driving motor 1's axle is connected with moment of torsion and angle sensor 3's one end, and moment of torsion and angle sensor 3's the other end is connected with the one end of torsion bar 8, and output shaft drive head 10 is installed to the other end of torsion bar 8, and output shaft drive head 10 is connected with speed reduction mechanism 11's center, and speed reduction mechanism 11 installs on speed reduction mechanism mounting fixture 12.
The utility model discloses in, adopt a shaft coupling 2 to be connected between rack driving motor 1 and moment of torsion and the angle sensor 3. The speed reduction mechanism 11 and the speed reduction mechanism fixing jig 12 are fixed by bolts.
The torque and angle sensor 3 is connected with the torsion bar 8 through a second coupling 4, a connecting flange component and a flexible coupling 7, the other end of the torque and angle sensor 3 is connected with the second coupling 4, one end of the torsion bar 8 is connected with the flexible coupling 7, and the second coupling 4 is connected with the flexible coupling 7 through the connecting flange component. The connecting flange assembly comprises a first connecting flange 5 and a second connecting flange 6. The flexible coupling 7 can compensate the concentricity deviation of the installed shafting.
The torsion bar 8 is connected with the output shaft driving head 10 by a connecting flange III 9. The torsion bar 8 is a concrete item torsion bar, and the torsional rigidity of the torsion bar is consistent with the design rigidity of the concrete item. The torsion bar 8 and the third connecting flange 9 are connected through a through hole, so that no residual torque exists in the torsion direction at the beginning of measurement.
The utility model discloses at the during operation, rack driving motor 1 receives behind the control signal of rack, rotate with certain speed and appointed direction, and then will rotate and transmit to torsion bar 8 front end, torsion bar 8 receives and begins to rotate behind the moment of torsion, after eliminating torsion clearance between 8 lower extreme via holes of torsion bar and three 9 of flange, begin to produce torsional deformation, and save torsional energy, torsion bar 8 transmits rotary motion to reduction gears 11 simultaneously, behind the moment of torsion that reduction gears 11 received is greater than its stiction's starting torque, begin to rotate, the rotary torque is the kinetic friction moment of torsion after the rotation begins. In this process, the torque and angle sensor 3 records the starting torque of the static friction and the rotational torque of the dynamic friction torque. And subsequently processing the data, and reading a starting torque drop value.
The utility model designs a starting torque drop value measuring device for the speed reducing mechanism, which is beneficial to the subsequent deep analysis of the problems; the bench driving motor 1 is adopted for driving, the speed is controllable, and the measurement stability is improved; in addition, the measurement of the starting torque falling value of the speed reducing mechanisms in different projects can be realized by replacing the torsion bar 8, and the universality is high.
Claims (7)
1. The utility model provides an electric power assisted steering tubular column reduction gears starts moment of torsion and falls value measuring device, includes rack driving motor, moment of torsion and angle sensor, torsion bar, output shaft drive head, reduction gears mounting fixture, its characterized in that: the shaft of the rack driving motor (1) is connected with one end of a torque and angle sensor (3), the other end of the torque and angle sensor (3) is connected with one end of a torsion bar (8), an output shaft driving head (10) is installed at the other end of the torsion bar (8), the output shaft driving head (10) is connected with the center of a speed reducing mechanism (11), and the speed reducing mechanism (11) is installed on a speed reducing mechanism fixing clamp (12).
2. The apparatus for measuring the breakaway torque value of the electric power steering column speed reducing mechanism according to claim 1, wherein: the rack driving motor (1) is connected with the torque and angle sensor (3) through a first coupling (2).
3. The apparatus for measuring the breakaway torque value of the electric power steering column speed reducing mechanism according to claim 1, wherein: the torque and angle sensor (3) is connected with the torsion bar (8) through a second coupling (4), a connecting flange component and a flexible coupling (7), the other end of the torque and angle sensor (3) is connected with the second coupling (4), one end of the torsion bar (8) is connected with the flexible coupling (7), and the second coupling (4) is connected with the flexible coupling (7) through the connecting flange component.
4. The apparatus for measuring the breakaway torque value of the electric power steering column speed reducing mechanism according to claim 3, wherein: the connecting flange assembly comprises a first connecting flange (5) and a second connecting flange (6).
5. The apparatus for measuring the breakaway torque value of the electric power steering column speed reducing mechanism according to claim 1, wherein: the torsion bar (8) is connected with the output shaft driving head (10) by a connecting flange III (9).
6. The apparatus for measuring the breakaway torque value of the electric power steering column speed reducing mechanism according to claim 5, wherein: the torsion bar (8) is connected with the third connecting flange (9) through a via hole.
7. The apparatus for measuring the breakaway torque value of the electric power steering column speed reducing mechanism according to claim 1, wherein: the speed reducing mechanism (11) and the speed reducing mechanism fixing clamp (12) are fixed by bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021711515.XU CN212931747U (en) | 2020-08-17 | 2020-08-17 | Device for measuring starting torque drop value of speed reducing mechanism of electric power steering column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021711515.XU CN212931747U (en) | 2020-08-17 | 2020-08-17 | Device for measuring starting torque drop value of speed reducing mechanism of electric power steering column |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212931747U true CN212931747U (en) | 2021-04-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021711515.XU Active CN212931747U (en) | 2020-08-17 | 2020-08-17 | Device for measuring starting torque drop value of speed reducing mechanism of electric power steering column |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212931747U (en) |
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2020
- 2020-08-17 CN CN202021711515.XU patent/CN212931747U/en active Active
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