Testing device for upper tubular column of electric power steering system

Abstract

The utility model relates to an electric power steering system upper tubular column testing device, and relates to the electric power steering system testing technology field, the electric power steering system upper tubular column testing device comprises a test bench, a first support is detachably installed on a bench surface of the test bench, and a telescopic cylinder is installed on the first support in a lifting adjusting manner; the driving end of the telescopic cylinder is detachably provided with a connecting piece used for being connected with a joint fork of an upper pipe column. A second support is adjustably installed on the table top of the test table, and a clamp used for clamping an upper tubular column is rotatably and adjustably installed on the second support. The integration level of the test bench can be improved, and the workshop space occupied by the test bench is reduced.

Description

Technical Field

[0001] The present application relates to the field of electric power steering system testing technology, and in particular to an upper column testing device for an electric power steering system. Background Art

[0002] The column electric power steering (CEPS) is a combination of a servo mechanism and a steering column. The torque of the motor is applied to the steering column through a worm gear and transmitted to the mechanical steering gear through an intermediate shaft. In the column electric power steering, the rotation of the steering wheel is transmitted to the input shaft of the steering gear unit. The pair of steering tie rods are pushed and pulled with the rotation of the input shaft, giving the steering control wheel a steering angle. The steering wheel support is fixed to the rear end of the steering shaft, and the steering shaft is rotatably supported on the inner side of the steering column. The front end of the steering shaft is connected to the rear end of the intermediate shaft via a universal joint yoke, and the front end of the intermediate shaft is connected to the input shaft via another universal joint yoke.

[0003] In the prior art, during the testing of the steering column of an automobile, it is necessary to perform tension and compression tests on the upper column in the column assembly in the axial, up-down, and left-right directions. A common test bench for tension and compression testing of the upper column mainly includes a test bench body, on which are respectively installed three tension and compression test mechanisms for the upper column in the axial, up-down, and left-right directions. The three mechanisms are respectively composed of a fixture and a telescopic cylinder installed on the test bench. During the actual testing process, the upper column needs to be installed on the fixtures of the three test mechanisms, and the universal joint yoke on the upper column is connected to the telescopic cylinder.

[0004] However, the test bench for string testing in the prior art occupies a large space and has a low degree of integration, and there is room for improvement. Utility Model Content

[0005] In order to improve the integration of the test bench and reduce the space occupied by the test bench in the workshop, the present application provides an upper column test device for an electric power steering system.

[0006] The present application provides an electric power steering system upper column testing device that adopts the following technical solution:

[0007] An upper column test device for an electric power steering system comprises a test bench, a first bracket is detachably mounted on the table of the test bench, a telescopic cylinder is detachably mounted on the first bracket, and a connecting piece for connecting a yoke of an upper column is detachably mounted on the driving end of the telescopic cylinder;

[0008] A second bracket is adjustably mounted on the table top of the test bench, and a clamp for clamping an upper pipe column is rotatably mounted on the second bracket.

[0009] By adopting the above technical solution, when testing the upper pipe column, the user installs the upper pipe column on the second bracket through the clamp; when performing tension and compression tests on the upper pipe column in the axial and left and right directions, the user can adjust the position of the first bracket so that the drive shaft of the telescopic cylinder is coaxial with or perpendicular to the yoke, connect the yoke on the upper pipe column through the connecting piece at the drive end of the telescopic cylinder, and apply push and pull actions to the yoke through the telescopic cylinder, so as to realize tension and compression tests on the upper pipe column in the axial and left and right directions; when the tension and compression tests in the axial and left and right directions are completed, the operator can rotate the clamp on the second bracket so that the clamp rotates 90 degrees, at this time, the drive shaft of the telescopic cylinder is kept perpendicular to the yoke, the connecting piece at the drive shaft end of the telescopic cylinder is replaced and connected to the yoke, and the yoke can be tensioned and compressed by extending and retracting the drive shaft of the telescopic cylinder. Through the setting of the first bracket and the second bracket, the upper pipe column can be quickly and conveniently subjected to tension and compression tests in three directions without the need for repeated disassembly and assembly of the upper pipe column, effectively improving the integration of the test bench and reducing the occupation of the workshop space by the test bench.

[0010] Preferably, a mounting plate is fixedly mounted on the table top of the test bench, and the mounting plate is mounted above the test bench;

[0011] The first bracket includes a frame base, and the frame base is provided with a plurality of mounting screw holes for screws to pass through;

[0012] The mounting plate is provided with a first mounting area and a second mounting area for mounting the frame base, wherein the first mounting area is arranged opposite to the yoke, and the second mounting area is arranged perpendicular to the yoke.

[0013] By adopting the above technical solution, during the tension and compression test of the upper pipe column, the operator can install the first bracket in the first installation area or the second installation area of ​​the mounting plate, so that the drive shaft of the telescopic cylinder can be coaxial or perpendicular to the yoke.

[0014] Preferably, a connecting portion is integrally formed on the frame base, and the connecting portion is rotatably connected to the mounting plate via a rotating shaft.

[0015] By adopting the above technical solution and setting the rotating shaft, when the position of the first bracket needs to be changed, the operator can remove the screws on the frame base and rotate the first bracket to quickly rotate the first bracket to another installation area, thereby improving the convenience of changing the position of the first bracket.

[0016] Preferably, a sliding block is provided on the first bracket for lifting and lowering, and the sliding block is fixedly connected to the cylinder body of the telescopic cylinder;

[0017] A mounting frame is fixedly mounted on the frame base, a first screw rod is threadedly connected to the mounting frame, a bottom end of the first screw rod is fixedly connected to a cylinder body of the telescopic cylinder, and a hand wheel is fixedly connected to the top end of the first screw rod.

[0018] By adopting the above technical solution, through the setting of the first screw rod, handwheel and slider, the operator can fine-tune the position of the telescopic cylinder to adjust the height of the connecting piece installed on the driving end of the telescopic cylinder, which is convenient for connecting yokes of different heights and improving the usability of the upper pipe column testing device.

[0019] Preferably, a gear ring is rotatably mounted on the second bracket, a carrier plate is fixedly mounted on the inner wall of the gear ring, and the clamp is fixedly mounted on the carrier plate;

[0020] A transmission gear is rotatably mounted on the second bracket, the transmission gear is meshed with the gear ring, and a positioning piece for fixing the transmission gear is detachably mounted on the second bracket.

[0021] By adopting the above technical solution, when the angle of the upper tube column needs to be changed, the user can remove the positioning piece to release the transmission gear. At this time, the user can rotate the ring gear to synchronously drive the upper tube column on the clamp to rotate. When the upper tube column rotates 90 degrees, the operator can reinstall the positioning piece to position the transmission gear, so that the ring gear cannot rotate, thereby fixing the upper tube column.

[0022] Preferably, the second bracket includes a side plate, the positioning member includes a gripping portion and a positioning portion, the side plate is provided with a through hole for the positioning portion to pass through, and one end of the positioning portion passing through the through hole is limited to be located between adjacent teeth of the transmission gear.

[0023] By adopting the above technical solution, the transmission gear and the gear ring can be locked through the positioning member.

[0024] Preferably, a second screw is threadedly connected to the test bench, the second screw is arranged along the axial direction of the upper pipe column, an adjustment screw hole matching the second screw is opened through the second bracket, and the second screw is threadedly connected to the second bracket.

[0025] By adopting the above technical solution, the position of the second bracket can be adjusted by screwing the second screw rod, so that the second bracket is suitable for tension and compression tests of upper pipe columns of different sizes, thereby improving the availability of the test device.

[0026] Preferably, a third screw rod is threadedly connected to the test bench, the third screw rod is arranged perpendicular to the axial direction of the upper pipe column, and the end of the third screw rod close to the side plate is against the side plate.

[0027] By adopting the above technical solution, the end of the third screw rod is pressed against the side plate, which can limit the position of the second screw rod and reduce the shaking and deviation of the second bracket.

[0028] In summary, the electric power steering system upper column testing device of the present application includes at least one of the following beneficial technical effects:

[0029] 1. When testing the upper pipe column, the user installs the upper pipe column on the second bracket through the clamp; when performing tension and compression tests on the upper pipe column in the axial direction and in the left and right directions, the user can adjust the position of the first bracket so that the drive shaft of the telescopic cylinder is coaxial with or perpendicular to the yoke, and connects the yoke on the upper pipe column through the connecting piece at the driving end of the telescopic cylinder. The telescopic cylinder applies a push-pull action to the yoke to realize tension and compression tests on the upper pipe column in the axial direction and in the left and right directions; when the tension and compression tests in the axial direction and in the left and right directions are completed, the operator can rotate the clamp on the second bracket so that the clamp rotates 90 degrees. At this time, the drive shaft of the telescopic cylinder is kept perpendicular to the yoke, the connecting piece at the driving shaft end of the telescopic cylinder is replaced and connected to the yoke, and the yoke can be tensioned and compressed by extending and retracting the drive shaft of the telescopic cylinder; through the setting of the first bracket and the second bracket, the upper pipe column can be quickly and conveniently subjected to tension and compression tests in three directions without the need for repeated disassembly and assembly of the upper pipe column, which effectively improves the integration of the test bench and reduces the occupation of the workshop space by the test bench;

[0030] 2. By screwing the second screw rod, the position of the second bracket can be adjusted, so that the second bracket is suitable for tension and compression tests on upper pipes of different sizes, thereby improving the availability of the test device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of an embodiment of the present application for demonstrating the overall structure of a testing device.

[0032] Figure 2 It is a schematic diagram used to illustrate the overall structure of the first bracket and the second bracket in an embodiment of the present application.

[0033] Figure 3 It is a schematic diagram of an embodiment of the present application for illustrating the overall structure of a connector.

[0034] Figure 4 It is a schematic diagram of an embodiment of the present application for illustrating the overall structure of the positioning member.

[0035] Explanation of the accompanying drawings: 1. test bench; 11. mounting plate; 12. first mounting area; 13. second mounting area; 14. second screw rod; 15. third screw rod; 2. first bracket; 21. rack base; 22. connecting part; 23. rotating shaft; 24. slider; 25. mounting frame; 26. first screw rod; 27. hand wheel; 3. telescopic cylinder; 31. connecting piece; 4. second bracket; 41. gear ring; 42. carrier plate; 43. transmission gear; 44. positioning piece; 441. gripping part; 442. positioning part; 45. side panel; 5. clamp. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-4 This application is described in further detail.

[0037] Example

[0038] The present application embodiment discloses a device for testing the upper column of an electric power steering system. Figure 1 , Figure 2 as well as Figure 3 , including a test bench 1, on the table of which a first bracket 2 is detachably mounted, on which a telescopic cylinder 3 is liftably mounted, and on the driving end of the telescopic cylinder 3 a connecting piece 31 for connecting a yoke of an upper pipe column is detachably mounted.

[0039] A second bracket 4 is adjustably mounted on the table top of the test bench 1 , and a clamp 5 for clamping the upper pipe column is rotatably mounted on the second bracket 4 .

[0040] When testing the upper pipe column, the user installs the upper pipe column on the second bracket 4 through the clamp 5; when performing tension and compression tests on the upper pipe column in the axial and left and right directions, the user can adjust the position of the first bracket 2 so that the driving shaft of the telescopic cylinder 3 is coaxial with or perpendicular to the yoke, and the yoke on the upper pipe column is connected through the connecting piece 31 at the driving end of the telescopic cylinder 3. The telescopic cylinder 3 applies a push-pull action to the yoke to realize tension and compression tests on the upper pipe column in the axial and left and right directions; when the tension and compression tests in the axial and left and right directions are completed, the operator can rotate the clamp 5 on the second bracket 4 so that the clamp 5 rotates 90 degrees. At this time, the driving shaft of the telescopic cylinder 3 is kept perpendicular to the yoke, the connecting piece 31 at the driving shaft end of the telescopic cylinder 3 is replaced and the connecting piece 31 is connected to the yoke, and the yoke can be tensioned and compressed by extending and retracting the driving shaft of the telescopic cylinder 3.

[0041] By setting the first bracket 2 and the second bracket 4, the upper pipe column can be quickly and conveniently subjected to tension and compression tests in three directions without repeatedly disassembling and assembling the upper pipe column, thereby effectively improving the integration of the test bench 1 and reducing the space occupied by the test bench 1 in the workshop.

[0042] It should be noted that the connecting member 31 in the embodiment of the present application is suitable for connection with the yoke during axial and left and right direction testing. The end of the connecting member 31 extends into the end of the yoke and is connected to the yoke through a screw; when the yoke is rotated ninety degrees, another connecting member 31 that is compatible with it can be replaced, which is not shown in the present embodiment and will not be described in detail.

[0043] Reference Figure 1 A mounting plate 11 is fixedly installed on the table top of the test bench 1, and the mounting plate 11 is erected above the test bench 1; the first bracket 2 includes a frame base 21, and the frame base 21 is provided with a plurality of mounting screw holes for screws to pass through; the mounting plate 11 is provided with a first mounting area 12 and a second mounting area 13 for mounting the frame base 21, the first mounting area 12 is arranged opposite to the yoke, and the second mounting area 13 is arranged perpendicular to the yoke, and the first mounting area 12 and the second mounting area 13 are respectively provided with mounting holes corresponding to the mounting screw holes on the frame base 21.

[0044] During the tension and compression test on the upper pipe column, the operator can install the first bracket 2 in the first installation area 12 or the second installation area 13 on the installation plate 11, so that the drive shaft of the telescopic cylinder 3 is coaxial or perpendicular to the yoke.

[0045] Reference Figure 1 The frame base 21 is integrally formed with a connecting portion 22, and the connecting portion 22 is rotatably connected to the mounting plate 11 via a rotating shaft 23. Through the setting of the rotating shaft 23, when the position of the first bracket 2 needs to be changed, the operator can remove the screws on the frame base 21 and rotate the first bracket 2 to quickly rotate the first bracket 2 to another installation area, which can improve the convenience of changing the position of the first bracket 2.

[0046] Reference Figure 2 A slider 24 is provided on the first bracket 2 for lifting, and the slider 24 is fixedly connected to the cylinder body of the telescopic cylinder 3; a mounting frame 25 is fixedly installed on the frame base 21, and a first screw rod 26 is threadedly connected to the mounting frame 25, and the bottom end of the first screw rod 26 is fixedly connected to the cylinder body of the telescopic cylinder 3, and the top end of the first screw rod 26 is fixedly connected to a hand wheel 27.

[0047] By setting the first screw rod 26, the hand wheel 27 and the slider 24, the operator can fine-tune the position of the telescopic cylinder 3 to adjust the height of the connecting piece 31 installed on the driving end of the telescopic cylinder 3, so as to connect yokes of different heights and improve the availability of the upper pipe column testing device.

[0048] Reference Figure 1 , Figure 2 as well as Figure 4A gear ring 41 is rotatably mounted on the second bracket 4, a carrier plate 42 is fixedly mounted on the inner wall of the gear ring 41, and the clamp 5 is fixedly mounted on the carrier plate 42; a transmission gear 43 is rotatably mounted on the second bracket 4, the transmission gear 43 is meshed with the gear ring 41, and a positioning member 44 for fixing the transmission gear 43 is detachably mounted on the second bracket 4.

[0049] When the angle of the upper pipe column needs to be changed, the user can remove the positioning piece 44 to release the transmission gear 43. At this time, the user can rotate the ring gear 41 to synchronously drive the upper pipe column on the clamp 5 to rotate. When the upper pipe column rotates 90 degrees, the operator can reinstall the positioning piece 44 to position the transmission gear 43, so that the ring gear 41 cannot rotate, thereby fixing the upper pipe column.

[0050] Reference Figure 4 The second bracket 4 includes a side plate 45, and the positioning member 44 includes a gripping portion 441 and a positioning portion 442. A through hole is formed on the side plate 45 for the positioning portion 442 to pass through, and one end of the positioning portion 442 passing through the through hole is limited between adjacent gear teeth of the transmission gear 43. The transmission gear 43 and the gear ring 41 can be locked by the positioning member 44.

[0051] Reference Figure 2 A second screw rod 14 is threadedly connected to the test bench 1 , and the second screw rod 14 is arranged along the axial direction of the upper pipe column. An adjusting screw hole matching the second screw rod 14 is penetrated and opened on the second bracket 4 , and the second screw rod 14 is threadedly connected to the second bracket 4 .

[0052] The operator can adjust the position of the second bracket 4 by screwing the second screw rod 14, so that the second bracket 4 is suitable for tension and compression tests on upper pipes of different sizes, thereby improving the availability of the test device.

[0053] Reference Figure 2 The test bench 1 is threadedly connected with a third screw rod 15, which is arranged perpendicular to the axial direction of the upper pipe column, and the end of the third screw rod 15 close to the side plate 45 abuts against the side plate 45. The end of the third screw rod 15 abuts against the side plate 45, which can limit the position of the second screw rod 14 and reduce the shaking and deviation of the second bracket 4.

[0054] The implementation principle of the upper column test device of the electric power steering system in the embodiment of the present application is as follows: when testing the upper column, the user installs the upper column on the second bracket 4 through the clamp 5; when performing tension and compression tests on the upper column in the axial direction and in the left and right directions, the user can adjust the position of the first bracket 2 so that the driving shaft of the telescopic cylinder 3 is coaxial with or perpendicular to the yoke, and the yoke on the upper column is connected through the connecting piece 31 at the driving end of the telescopic cylinder 3, and the telescopic cylinder 3 applies a push-pull action to the yoke, so as to realize tension and compression tests on the upper column in the axial direction and in the left and right directions; when the upper column is tested in the axial direction and in the left and right directions, the user can adjust the position of the first bracket 2 so that the driving shaft of the telescopic cylinder 3 is coaxial with or perpendicular to the yoke, and the yoke on the upper column is connected through the connecting piece 31 at the driving end of the telescopic cylinder 3, and the yoke is pushed and pulled by the telescopic cylinder 3. After the tension and compression tests in three directions are completed, the operator can rotate the clamp 5 on the second bracket 4 to rotate the clamp 5 90 degrees. At this time, the driving shaft of the telescopic cylinder 3 is kept perpendicular to the yoke, the connecting piece 31 at the driving shaft end of the telescopic cylinder 3 is replaced and the connecting piece 31 is connected to the yoke, and the yoke can be subjected to tension and compression tests by extending and retracting the driving shaft of the telescopic cylinder 3; through the arrangement of the first bracket 2 and the second bracket 4, the upper pipe column can be quickly and conveniently subjected to tension and compression tests in three directions without the need for repeated disassembly and assembly of the upper pipe column, thereby effectively improving the integration of the test bench 1 and reducing the space occupied by the test bench 1 in the workshop.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An upper column test device for an electric power steering system, characterized in that: The test bench (1) comprises a first bracket (2) detachably mounted on the tabletop of the test bench (1), a telescopic cylinder (3) being mounted on the first bracket (2) in a manner that it can be raised and lowered, and a connecting piece (31) for connecting a yoke of an upper pipe column being detachably mounted on the driving end of the telescopic cylinder (3); A second bracket (4) is adjustably mounted on the table top of the test bench (1), and a clamp (5) for clamping an upper pipe column is rotatably and adjustably mounted on the second bracket (4).

2. The upper column testing device of an electric power steering system according to claim 1, characterized in that: A mounting plate (11) is fixedly mounted on the table top of the test bench (1), and the mounting plate (11) is mounted above the test bench (1); The first bracket (2) comprises a frame base (21), and the frame base (21) is provided with a plurality of mounting screw holes for screws to pass through; The mounting plate (11) is provided with a first mounting area (12) and a second mounting area (13) for mounting the frame base (21); the first mounting area (12) is arranged directly opposite to the yoke, and the second mounting area (13) is arranged perpendicular to the yoke.

3. The upper column testing device of an electric power steering system according to claim 2, characterized in that: A connecting portion (22) is integrally formed on the frame base (21), and the connecting portion (22) is rotatably connected to the mounting plate (11) via a rotating shaft (23).

4. The electric power steering system upper column testing device according to claim 2, characterized in that: A sliding block (24) is provided on the first bracket (2) for lifting and lowering, and the sliding block (24) is fixedly connected to the cylinder body of the telescopic cylinder (3); A mounting frame (25) is fixedly mounted on the frame base (21), a first screw rod (26) is threadedly connected to the mounting frame (25), a bottom end of the first screw rod (26) is fixedly connected to the cylinder body of the telescopic cylinder (3), and a hand wheel (27) is fixedly connected to the top end of the first screw rod (26).

5. The upper column testing device of an electric power steering system according to claim 1, characterized in that: A gear ring (41) is rotatably mounted on the second bracket (4), a carrier plate (42) is fixedly mounted on the inner wall of the gear ring (41), and the clamp (5) is fixedly mounted on the carrier plate (42); A transmission gear (43) is rotatably mounted on the second bracket (4), the transmission gear (43) meshing with the gear ring (41), and a positioning member (44) for fixing the transmission gear (43) is detachably mounted on the second bracket (4).

6. The upper column testing device of an electric power steering system according to claim 5, characterized in that: The second bracket (4) comprises a side plate (45), the positioning member (44) comprises a gripping portion (441) and a positioning portion (442), a through hole is formed through the side plate (45) for the positioning portion (442) to pass through, and one end of the positioning portion (442) passing through the through hole is limitedly located between adjacent gear teeth of the transmission gear (43).

7. The upper column testing device of an electric power steering system according to claim 6, characterized in that: A second screw rod (14) is threadedly connected to the test bench (1), the second screw rod (14) is arranged along the axial direction of the upper pipe column, an adjustment screw hole adapted to the second screw rod (14) is penetrated through the second bracket (4), and the second screw rod (14) is threadedly connected to the second bracket (4).

8. The upper column testing device of an electric power steering system according to claim 7, characterized in that: A third screw rod (15) is threadedly connected to the test bench (1), and the third screw rod (15) is arranged perpendicular to the axial direction of the upper pipe column. The end of the third screw rod (15) close to the side plate (45) abuts against the side plate (45).

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