Auxiliary frame multi-connection-point loading test equipment and loading method thereof

Abstract

An auxiliary frame multi-connection-point loading test device comprises a fixing seat, a vertical long-strip-shaped hole is formed in the fixing seat, the fixing seat comprises a second support, and a horizontal long-strip-shaped hole is formed in the second support; the reversing unit comprises a main shaft, a first reversing seat and a second reversing seat; the first load sensor is used for monitoring the stress of a corresponding connecting point of the auxiliary frame; the hydraulic cylinder serves as a load power source; wherein the first reversing seat and the second reversing seat are respectively provided with a U-shaped seat, and the U-shaped seats are used for being connected with a loading rod system. According to the invention, the auxiliary frames of different vehicle types can be commonly used during the multi-connection-point test of the automobile auxiliary frame, the double-side multi-connection-point test can also be carried out, the layout is convenient, and the space is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of test benches, and in particular to a subframe multi-connection point loading test device and a loading method thereof. Background Art

[0002] The automotive suspension system is an important assembly in the vehicle chassis system, which elastically connects the vehicle frame and the wheels and is related to various performance of the vehicle. The function of the automotive suspension system is to transmit the forces and torques acting between the wheels and the vehicle frame, and at the same time buffer the impact force brought by the uneven road surface to the vehicle frame or body of the vehicle, reduce the vibration caused by this, and ensure that the vehicle can drive smoothly. The automotive suspension system is subject to forces during driving, and the structure and design of the automotive suspension system will affect the handling and comfort of the vehicle. The reliability of the automotive suspension system directly affects the normal driving of the vehicle and the safety of the vehicle occupants. Especially when the automotive suspension system is under variable impacts and fatigue loads during vehicle driving, higher requirements are imposed on the mechanical properties such as strength and fatigue of the automotive suspension system. Therefore, during the product R & D cycle, one of the most important tasks is to determine whether the fatigue life and strength of the automotive suspension system can meet the requirements of various working conditions.

[0003] With the acceleration of the development speed of various vehicle models and the shortening of the R & D cycle of vehicle models, continuously strengthening the R & D efforts of automotive suspension system tests and improving the overall mechanical properties of the automotive suspension system to meet the needs of various road conditions have become an urgent demand for the development of the automotive industry.

[0004] As a key component of the automotive suspension system, the relevant fatigue or strength verification of the subframe is crucial. Due to the complex structure of the subframe, there are many connection points to be tested, and they are all at spatial angles. Currently, there is no effective test bench that can simultaneously test more than two connection points of the subframe.

[0005] Therefore, in view of the problems existing in the prior art, the designer of this case, relying on years of experience in this industry, actively studied and improved, and thus there is the present invention, a subframe multi-connection point loading test device and a loading method thereof. Summary of the Invention

[0006] In view of this, the present invention aims to provide a subframe multi-connection point loading test device and a loading method thereof, which can solve the problem that the automotive subframe cannot simultaneously test more than two connection points.

[0007] To achieve the above object, the technical solution of the present invention is realized as follows:

[0008] A multi - connection - point loading test device for a subframe, comprising a fixed seat. A long hole in the vertical direction is provided on the fixed seat, and the fixed seat includes a second support seat, on which a long hole in the horizontal direction is provided; a commutation unit, including a main shaft, a first commutation seat and a second commutation seat. The height position of the main shaft is adjusted by a lead - screw nut. The first commutation seat and the second commutation seat are adjustably installed on the bearing seat through fasteners. Oppositely - arranged tapered roller bearings are installed in the bearing seat, so that the commutation unit can freely rotate under axial and radial loads; a first load sensor for monitoring the force on the corresponding connection point of the subframe; a hydraulic cylinder as the load power source; wherein, U - shaped seats are respectively provided on the first commutation seat and the second commutation seat for connecting the loading rod system.

[0009] In some embodiments, the fixed seat includes a first support seat, a second support seat and a first base. The first support seat is connected to the second support seat through a fastener passing through the first bolt hole and the first long hole on the second support seat. The second support seat is connected to the first vertical plate through a fastener passing through the second long hole and the fourth long hole on the first vertical plate. A third long hole is provided on the first base for connecting to the test platform through a fastener.

[0010] In some embodiments, the commutation unit further includes a second base, a third base and a bearing seat. The second base is connected to the third base through a fastener. A sixth long hole is provided on the third base for fixing the main shaft through a fastener and a first arc - surface washer. Tapered roller bearings are installed on the main shaft, and the bearing seat is sleeved outside the tapered roller bearings of the main shaft.

[0011] In some embodiments, the first commutation seat is adjustably installed on the bearing seat through the first bolt hole, a second arc - surface washer and a third fastener. The second commutation seat is adjustably installed on the bearing seat through a bolt hole and a corresponding arc - surface washer and fastener, and the position of the second commutation seat relative to the first commutation seat is adjustable.

[0012] In some embodiments, it further includes a connecting rod. One end of the connecting rod is connected to the test connection point of the subframe through a first spherical bearing or a universal fixture, and the other end is connected to the U - shaped seat on the first commutation seat through a second spherical bearing, forming a first loading rod system; the hydraulic cylinder is connected to the U - shaped seat on the second commutation seat through a third spherical bearing, forming a second loading rod system.

[0013] In some embodiments, a first load sensor and a second load sensor are respectively provided on the first loading rod system and the second loading rod system.

[0014] A loading method using the above - mentioned multi - connection - point loading test device for a subframe, comprising the following steps:

[0015] S1. Install the subframe on the fixed seat according to the drawing requirements, and fix the fixed seat on the test platform with a pressing plate or a fastener;

[0016] S2. Install the commutation unit of the second base.

[0017] S3. Adjust the main shaft, the first commutation seat and the second commutation seat to the predetermined positions according to the requirements of the drawing.

[0018] S4. Determine the length and quantity of the connecting rods according to the requirements of the drawing.

[0019] S5. Connect the first spherical bearing or universal fixture, the connecting rod, the first load sensor, and the second spherical bearing in series and fasten them. Connect the two ends to the test connection points of the subframe and the U-shaped seat on the first commutation seat respectively.

[0020] S6. Adjust the spatial position of the connecting rod on the subframe side.

[0021] S7. Fix the commutation unit on the test platform with a pressing plate or fasteners.

[0022] S8. Connect the third spherical bearing, the connecting rod, the second load sensor, and the hydraulic cylinder in series. Connect the two ends to the square box and the U-shaped seat on the second commutation seat respectively.

[0023] S9. Adjust the axis of the rod system where the hydraulic cylinder is located to be perpendicular to the plane of the sixth base plate on the second commutation seat.

[0024] In some embodiments, the tools for adjusting the spatial position of the connecting rod on the subframe side in step S6 include an angle gauge, a folding ruler, and a spirit level.

[0025] In some embodiments, the tools for adjusting the axis of the rod system where the hydraulic cylinder is located to be perpendicular to the plane of the sixth base plate on the second commutation seat in step S9 include an angle gauge, a folding ruler, and a spirit level.

[0026] Compared with the prior art, the subframe multi-connection point loading test equipment and its loading method of the present invention have the following advantages:

[0027] The subframe multi-connection point loading test equipment and its loading method disclosed by the present invention can not only be applicable to subframes of different vehicle models during the multi-connection point test of the vehicle subframe, but also facilitate the adjustment of the spatial angle and distance, so that the hydraulic cylinder does not have to be in the test direction of the corresponding connection points of the subframe. The subframe can be tested with multiple connection points on the left or right side alone, or with multiple connection points on both sides, saving space and facilitating layout, and is worthy of promotion and use in the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0029] Figure 1This is the overall schematic diagram of a multi - connection - point loading test device for a sub - frame according to the present invention.

[0030] Figure 2 This is the schematic diagram of the fixed seat structure of a multi - connection - point loading test device for a sub - frame according to the present invention.

[0031] Figure 3 This is the partial exploded schematic diagram of the fixed seat of a multi - connection - point loading test device for a sub - frame according to the present invention.

[0032] Figure 4 This is the overall schematic diagram of the commutation unit of a multi - connection - point loading test device for a sub - frame according to the present invention.

[0033] Figure 5 This is the exploded schematic diagram of the commutation unit of a multi - connection - point loading test device for a sub - frame according to the present invention.

[0034] Figure 6 This is the schematic diagram of the method for adjusting the horizontal position of the loading rod system at the test connection points of the sub - frame and the commutation unit of a multi - connection - point loading test device for a sub - frame according to the present invention.

[0035] Figure 7 This is the schematic diagram of the method for adjusting the vertical angle of the loading rod system at the test connection points of the sub - frame of a multi - connection - point loading test device for a sub - frame according to the present invention.

[0036] Description of reference numerals

[0037] 1. Fixed seat, 2. Subframe, 3. First spherical plain bearing or universal fixture, 4. Connecting rod, 5. First load sensor, 6. Second spherical plain bearing, 7. Commutation unit, 8. Third spherical plain bearing, 9. Second load sensor, 10. Hydraulic cylinder, 11. Ball hinge base, 12. Pressure plate, 13. Square box, 14. Test platform, 86. Arc-shaped connecting rod; 15. First support, 16. Second support, 17. First base; 18. First reinforcing rib, 19. First bottom plate, 20. First connecting plate, 21. First bolt hole, 22 Second bottom plate, 23 First long slot, 24. Second reinforcing rib, 25. Third bottom plate, 26. Second long slot, 27. Fourth bottom plate, 28. Third long slot, 29. First vertical plate, 30. Fourth long slot, 31. Third reinforcing rib, 32. Second vertical plate, 33. First lifting hole; 34. Second base, 35. First fastener, 36. Third base, 37. First arc washer, 38. Second fastener, 39. Second commutation seat, 40. U-shaped seat, 41. Second marking line, 42. Pin shaft, 43. Third fastener, 44. Lead screw nut, 45. Lead screw, 46. Spindle, 47. Upper end cover, 48. Second arc washer, 49. Third fastener, 50. Bearing seat, 51. First commutation seat, 52. First marking line; 53. First tapered roller bearing, 54. First bolt hole, 55 Second bolt hole, 56. Lower end of spindle, 57. Shoulder, 58. Upper end of spindle, 59. Stopping groove, 60. Third bolt hole, 61. Second tapered roller bearing, 62. Bush, 63. Lock washer for round nut, 64. First round nut, 65. Second round nut, 66. Fourth bolt hole, 67. First arc seat, 68. Fourth reinforcing rib, 69. Fifth bottom plate, 70. First bolt through hole, 71. Fourth long slot, 72. Second arc seat, 73. Fifth long slot, 74. Sixth bottom plate, 75. Second bolt through hole, 76. Fifth reinforcing rib, 77. First cylinder, 78. Sixth reinforcing rib, 79. First flange, 80. Second flange, 81. Third bolt through hole, 82. Second cylinder, 83. Seventh reinforcing rib, 84. First bearing limit, 85. Second bearing limit, 87. Sixth long slot, 88, Slightly thinner area; 89. Adjusting plate, 90. Folding ruler, 91. Tightening bolt, 92. Small plate, 93. Angle ruler; 94. Level gauge. Detailed implementation manners

[0038] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments may be combined with each other.

[0039] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings and in conjunction with embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] Reference is made below Figures 1 to 7 and in conjunction with embodiments to describe a multi-connection point loading test device for a subframe according to an embodiment of the present invention.

[0041] A multi-connection point loading test device for a subframe includes a fixed seat 1. A long hole in the vertical direction is provided on the fixed seat 1. The fixed seat 1 includes a second support 16, and a long hole in the horizontal direction is provided on the second support 16, which can be adapted to subframes of different vehicle models; a commutation unit 7, including a main shaft 46, a first commutation seat 51 and a second commutation seat 39. The height position of the main shaft 46 is adjusted by a lead screw nut 44. The first commutation seat 51 and the second commutation seat 39 are adjustably installed on a bearing seat 50 by fasteners. Oppositely arranged tapered roller bearings are installed in the bearing seat 50, so that the commutation unit 7 can freely rotate under axial and radial loads; a first load sensor 5 is used to monitor the force on the corresponding connection point of the subframe 2; a hydraulic cylinder 10 serves as a load power source; wherein, U-shaped seats 40 are respectively provided on the first commutation seat 51 and the second commutation seat 39 for connecting a loading rod system.

[0042] As Figure 1The figure shows a schematic structural diagram of the multi-connection point loading test equipment for the subframe of the present invention. The subframe 2 is fixed to the fixed seat 1 by fasteners, and the fixed seat 1 is fixed to the test platform 14 by a pressing plate 9 or fasteners. The first spherical eye bearing or universal fixture 3 is connected to the corresponding test connection point of the subframe 2 by fasteners. The first spherical eye bearing or universal fixture 3 is connected to the connecting rod 4 by threads and locked. The connecting rod 4 is connected to the first load sensor 5 by threads. The first load sensor 5 is connected to the second spherical eye bearing through the connecting rod 4. The second spherical eye bearing is connected through the pin shaft 42 in the commutation unit 7 and the U-shaped seat 40 on the second commutation seat 51 in the commutation unit 7. One or more of the above connecting rods 4 need to be determined according to the spatial position. If there is interference of the connecting rod 4 in the loading directions of different connection points, an arc-shaped connecting rod 86 can be used for avoidance. The hydraulic cylinder 10 with a spherical hinge base 11 at the tail is fixed to the corresponding position of the square box 13 by a pressing plate 9, and the square box 13 is fixed to the test platform 14 by fasteners. The other end of the hydraulic cylinder 10 is connected with a second load sensor 9. The second load sensor 9 is connected to the connecting rod 4 by threaded fasteners. The other end of the connecting rod 4 is connected to the third spherical eye bearing 8 by threads. The third spherical eye bearing 8 is connected through the pin shaft 42 and the U-shaped seat 40 on the first commutation seat 39 in the commutation unit 7. The above first spherical eye bearing or universal fixture 3, the second spherical eye bearing 6 and the connecting rod connected between them together form a two-force bar structure. The above third spherical eye bearing 8, the spherical hinge base 11 and the connecting parts between them form a two-force bar. The first load sensor 5 is used to feedback the load required by the test. The second load sensor 9 is used to monitor the output force of the hydraulic cylinder 10, and the second load sensor 9 may also be absent.

[0043] As Figure 2 shown is a schematic diagram of the overall structure of the fixed seat of the present invention. As Figure 3 shown is a partial decomposition diagram of the fixed seat of the present invention. The first support 15 is welded and composed of one first bottom plate 19, two first stiffening ribs 18 and one first connecting plate 20. Corresponding fasteners are used to pass through the first bolt hole 21 and the first long hole 23 on the second support 16 for fastening. The second support 16 is welded and composed of one second bottom plate 22, two second stiffening ribs 24 and one third bottom plate 25. Corresponding fasteners are used to pass through the second long hole 26 and the fourth long hole 30 on the first vertical plate 29 for fastening. The first base 17 is welded and composed of one fourth bottom plate 27, one second vertical plate 32, two first vertical plates 29 and two third stiffening ribs 31. The third long hole 28 is used to pass through fasteners to connect and fasten with the test platform 14. A first lifting hole 33 is opened on the second vertical plate 32. The combination of the first long hole 23, the second long hole 26 and the fourth long hole 30 can make the fixed seat 1 adapt to subframes 2 of different sizes.

[0044] As Figure 4 shown is the overall structure diagram of the commutation unit 7. AsFigure 5 The exploded view of the commutation unit 7 is shown. The second base 34 is welded by two second flange plates 80, a second cylinder 82, and four seventh reinforcing ribs 83. The second flange plate 80 is provided with third bolt through-holes 81 for connecting to the third base 36 through fasteners. The second flange plate 80 at the bottom of the second base 34 can be fixed to the test platform 14 through a pressing plate 12 or corresponding fasteners. The height of the second base 34 can be made in several different heights to meet the tests of different subframes. When the second base 34 is needed, it can be applied. Using the second base can make up for the problem of insufficient height of part of the commutation unit.

[0045] The third base 36 is welded and composed of a first flange plate 79, a first cylinder 77, and four sixth reinforcing ribs 78. Four sixth long holes 87 are opened on the first cylinder 77, and the main shaft 46 can be fixed through a first arc washer 37 and a second fastener 38. A number of second bolt holes 55 are opened at the lower end 56 of the main shaft 46 on the main shaft 46 for fixing the main shaft 46 through the second fastener 38. A shoulder 57 is provided at the bottom of the upper end 58 of the main shaft 46 on the main shaft 46 to limit the movement of the inner ring of the first tapered roller bearing 53 on the axis of the main shaft 46. The inner ring of the first tapered roller bearing 53 and the upper end 58 of the main shaft are in an interference fit for easy installation, and a slightly thinner area 88 with a diameter thinner than the inner diameter of the inner ring of the first tapered roller bearing 53 is left at the upper end 58 of the main shaft to facilitate the installation of the inner ring of the first tapered roller bearing 53.

[0046] The outer ring of the first tapered roller bearing 53 is installed at the second bearing limit 85 at the bottom of the bearing housing 50 through an interference fit for easy installation. The second bearing limit 85 can limit the movement of the outer ring of the first tapered roller bearing 53 on the axis. The outer ring of the second tapered roller bearing 61 is installed at the first bearing limit 84 of the bearing housing 50 through an interference fit for easy installation. The first bearing limit 84 can limit the movement of the outer ring of the second tapered roller bearing 61 in the axial direction. Ensure that the small cone surfaces of the inner rings of the first tapered roller bearing 53 and the second tapered roller bearing 61 are installed face to face, that is, the small cone surface of the inner ring of the first tapered roller bearing 53 faces upward, and the small cone surface of the inner ring of the second tapered roller bearing 61 faces downward. Install the bearing housing 50 with the outer rings of the first tapered roller bearing 53 and the second tapered roller bearing 61 installed on the main shaft 46. Since the inner and outer rings of the first tapered roller bearing 53 are in a tapered surface fit and the small cone surface of the inner ring of the first tapered roller bearing 53 faces upward, the bearing housing 50 will not fall off. Subsequently, the inner ring of the second tapered roller bearing 61 is installed from the upper end 58 of the main shaft 46 of the main shaft 46 to the corresponding position of the outer ring of the second tapered roller bearing 61 through an interference fit for easy installation.

[0047] A slightly thinner area 88 is provided on the main shaft 46 to facilitate the installation of the inner ring of the first tapered roller bearing 53. A bushing 62 is installed on the upper part of the inner ring of the second tapered roller bearing 61, and the bushing 62 has a clearance fit with the main shaft 46. A stop groove 59 is provided at the top of the main shaft 46. The stop washer for round nut 63 is installed on the bushing 62, and the stop part of the stop washer for round nut 63 is installed in the stop groove 59. A thread of appropriate length is provided on the upper part of the main shaft 46 for threaded connection with the first round nut 64 and the second round nut 65. The first round nut 64 is installed at the upper end of the stop washer for round nut 63. After adjusting the clearance of the first tapered roller bearing 53 and the second tapered roller bearing 61 with the first round nut 64, it is locked with the second round nut 65. After adjusting the clearance, while ensuring that the inner and outer rings of the first tapered roller bearing 53 and the second tapered roller bearing 61 are in contact, the inner and outer rings can rotate freely without obstruction relative to each other.

[0048] The installation position of the first round nut 64 should be higher than the upper part of the bearing housing 50 to facilitate the rotation of the first round nut 64 and the second round nut 65 with tools. After the above installation, the upper end cover 47 with a circular hole in the middle is fixed to the upper part of the bearing housing 50 through the third fastener 43, and threaded holes for installing the third fastener 43 are provided on the upper cross-section of the bearing housing 50. The first tapered roller bearing 53 and the second tapered roller bearing 61 can bear axial force and radial force simultaneously. A third bolt hole 60 of appropriate length is provided on the upper part of the main shaft 46, not too long. A through hole with a diameter slightly larger than the outer diameter of the lead screw 45 is provided inside the main shaft 46 except for the part of the third bolt hole 60 to facilitate the installation and rotation of the lead screw 45. The lead screw 45 directly contacts the upper end face of the first flange 79 at the bottom of the third base 36 through the third bolt hole 60 on the upper part of the main shaft 46. Two lead screw nuts 44 that lock each other are installed on the top of the lead screw 45. By loosening the second fastener 38 on the side of the third base 36, the lead screw 45 can be rotated by rotating the lead screw nuts 44. By the threaded connection between the lead screw 45 and the third bolt hole 60 on the upper part of the main shaft 46, the position of the main shaft 46 on the axis of the third base 36 can be adjusted.

[0049] The second commutation seat 39 is welded and composed of a second arc seat 72, a sixth base plate 74, and two fifth reinforcing ribs 76. A fifth long hole 73 is formed in the second arc seat 72 for being fixed to the first bolt hole 54 of the bearing seat 50 through a second arc surface washer 48 and a third fastener 49. The fifth long hole 73 can adjust the position of the second arc seat 72 around the axis of the bearing seat 50. At least two second bolt through holes 75 are formed in the sixth base plate 74. The second bolt through holes 75 are connected with a U-shaped seat 40 through fasteners. The U-shaped seat 40 can be connected with a third spherical bearing 8 through a pin shaft 42. Similarly, the first commutation seat 51 is welded and composed of a first arc seat 67, a fifth base plate 69, and two fourth reinforcing ribs 68. A fourth long hole 71 is formed in the first arc seat 67 for being fixed to the first bolt hole 54 of the bearing seat 50 through a second arc surface washer 48 and a third fastener 49. The fourth long hole 71 can adjust the position of the first arc seat 67 around the axis of the bearing seat 50. A first bolt through hole 70 is formed in the fifth base plate 69. The first bolt through hole 70 is connected with a U-shaped seat 40 through fasteners. The U-shaped seat 40 can be connected with a second spherical bearing 6 through a pin shaft 42. The distance from the second bolt through hole 75 to the axis of the bearing seat 50 needs to be greater than the distance from the first bolt through hole 70 to the axis of the bearing seat 50, preferably 1.5 to 2 times, because the rod system connected to the first commutation seat 51 is directly loaded onto the subframe 2, which is a spatial angle, and the axial force loaded onto the rod system connected to the first commutation seat 51 is less than the force for rotating around the axis of the bearing seat 50 through the first bolt through hole 70. First scale lines 52 and second scale lines 41 are respectively formed at positions corresponding to the first bolt through hole 70 and the second bolt through hole 75 on the fourth reinforcing rib 68 and the fifth reinforcing rib 76 for referring to and adjusting the angular positions of the connecting rod 4 and the hydraulic cylinder 10.

[0050] Figure 6 The figure shows a schematic diagram of the loading rod system and the commutation unit horizontal position adjustment method for the subframe test connection point of the present invention. The bottom of the fixed seat 1 is fixed parallel to the test platform 14. The adjusting plate 89 is leaned against the outside of the connecting rod 4. An angle ruler 93 is placed at the bottom of the adjusting plate 89. The angle between the adjusting plate 89 and the groove line of the test platform 14 is adjusted by using the angle ruler 93 until the connecting rod 4 reaches the position required by the drawing. The folding ruler 90 is composed of three small plates 92. The three small plates 92 are connected to each other through fasteners 91. The small plates 92 at both ends of the folding ruler 90 are on the same side. The three small plates 92 can rotate freely relative to each other. One small plate 92 at one end of the folding ruler 90 is placed along the first scale line 52 or the second scale line 41, and the other small plate 92 at the other end of the folding ruler 90 is placed along the axis of the connecting rod 4. If the small plate 92 at the other end of the folding ruler 90 is not at the axis position of the connecting rod 4, the overall position of the commutation unit 7 or the positions of the first commutation seat 51 and the second commutation seat 39 are adjusted. After adjusting the positions, the commutation unit 7, the first commutation seat 51, and the second commutation seat 39 are fixed.

[0051] Figure 7 The figure shows a schematic diagram of the method for adjusting the vertical angle of the loading rod system at the test connection points of the subframe of the present invention. A level 94 is placed on the connecting rod 4. The position of the main shaft 46 in the vertical direction is rotated by turning the lead screw nut 44 until the vertical angle on the connecting rod 4 meets the requirements of the drawing. The positions of the first reversing seat 51, the second reversing seat 39, the presence or absence of the second base 34, the position of the subframe 2, etc. need to be adjusted to approximate positions according to the requirements of the 3D drawing, and then the connecting rod 4 and the hydraulic cylinder 10 are adjusted to the positions required by the drawing by using an angle gauge 93, a folding rule 90, a level 94, etc. The axis of the rod system where the hydraulic cylinder 10 is located needs to be perpendicular to the plane of the sixth base plate 74 on the second reversing seat 39.

[0052] Please refer to Figure 1 , which shows a schematic diagram of the application of the multi-connection point loading test equipment for the subframe of the present invention. The loading method of the multi-connection point loading test equipment for the subframe includes:

[0053] Execute step S1: Install the subframe 2 to the required position on the fixed seat 1 according to the requirements of the drawing. The bottom plate of the fixed seat 1 is parallel to the slot line of the test platform 14, and then the fixed seat 1 is fixed at a suitable position on the test platform 14 by using a pressing plate 12 or corresponding fasteners;

[0054] Execute step S2: Determine the reversing unit 7 where the second base 34 needs to be installed;

[0055] Execute step S3: Adjust the main shaft 46, the first reversing seat 51, and the second reversing seat 39 to the predetermined positions according to the requirements of the 3D drawing;

[0056] Execute step S4: Determine the length and quantity of the connecting rod 4 according to the requirements of the 3D drawing;

[0057] Execute step S5: Connect the first spherical eye bearing or universal fixture 3, the connecting rod 4, the first load sensor 5, and the second spherical eye bearing 6 in series and fasten them. The two ends are respectively connected to the corresponding test connection points of the subframe 2 and the U-shaped seat 40 on the first reversing seat 51;

[0058] Execute step S6: Use an angle gauge 93, a folding rule 90, a level 94, etc. to adjust the spatial position of the connecting rod 4 on the side of the subframe 2;

[0059] Execute step S7: Fix the reversing unit 7 to the test platform 14 by using a pressing plate 12 or corresponding fasteners.

[0060] Execute step S8: Connect the third spherical eye bearing 8, the connecting rod 4, the second load sensor 9, and the hydraulic cylinder 10 in series. The two ends are respectively connected to the square box 13 and the U-shaped seat 40 on the second reversing seat 39. The second load sensor 9 is generally not installed according to actual needs;

[0061] Execute step S9: Use an angle ruler 93, a folding ruler 90, a spirit level 94, etc. to adjust the axis of the rod system where the hydraulic cylinder 10 is located to be perpendicular to the plane of the sixth base plate 74 on the second reversing seat 39.

[0062] Execute step S10: Fasten the relevant parts.

[0063] Compared with the prior art, the subframe multi-connection point loading test equipment of the present invention has the following advantages:

[0064] The subframe multi-connection point loading test equipment and its loading method disclosed by the present invention can not only be used for subframes of different vehicle models during the multi-connection point test of the automotive subframe, but also facilitate the adjustment of spatial angles and distances, so that the hydraulic cylinder does not have to be in the test direction of the corresponding connection point of the subframe. The subframe can be tested at multiple connection points on the left or right side alone, or at multiple connection points on both sides, saving space and facilitating layout, and is worthy of promotion and use in the industry.

[0065] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the protection scope of the present invention.

[0066] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0067] In the present invention, unless otherwise clearly specified and limited, the terms "mounted", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0068] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A subframe multi-connection point loading test device, characterized in that It includes a fixed seat (1) with a vertically elongated hole formed thereon. The fixed seat (1) includes a second support (16) with a horizontally elongated hole formed thereon; a commutation unit (7), including a main shaft (46), a first commutation seat (51) and a second commutation seat (39). The height position of the main shaft (46) is adjusted by a lead screw nut (44). The first commutation seat (51) and the second commutation seat (39) are adjustably mounted on a bearing seat (50) through fasteners. Oppositely arranged tapered roller bearings are installed in the bearing seat (50) so that the commutation unit (7) can freely rotate under axial and radial loads; a first load sensor (5) for monitoring the force on the corresponding connection point of the subframe (2); a hydraulic cylinder (10) as a load power source; wherein, U-shaped seats (40) are respectively provided on the first commutation seat (51) and the second commutation seat (39) for connecting a loading rod system.

2. The subframe multi-connection point loading test equipment according to claim 1, characterized in that The fixed seat (1) includes a first support (15), a second support (16) and a first base (17). The first support (15) is connected to the second support (16) by a fastener passing through a first bolt hole (21) and a first elongated hole (23) on the second support (16). The second support (16) is connected to a first vertical plate (29) by a fastener passing through a second elongated hole (26) and a fourth elongated hole (30) on the first vertical plate (29). A third elongated hole (28) is provided on the first base (17) for connecting to a test platform (14) through a fastener.

3. The subframe multi-connection point loading test equipment according to claim 1, characterized in that The commutation unit (7) further includes a second base (34), a third base (36) and a bearing seat (50). The second base (34) is connected to the third base (36) by a fastener. A sixth elongated hole (87) is formed on the third base (36) for fixing the main shaft (46) through a fastener and a first arc washer (37). Tapered roller bearings are installed on the main shaft (46). The bearing seat (50) is sleeved outside the tapered roller bearings of the main shaft (46).

4. The subframe multi-connection point loading test equipment according to claim 3, characterized in that The first commutation seat (51) is adjustably mounted on the bearing seat (50) through a first bolt hole (54), a second arc washer (48) and a third fastener (49). The second commutation seat (39) is adjustably mounted on the bearing seat (50) through a bolt hole and a corresponding arc washer and fastener, and the position of the second commutation seat (39) is adjustable relative to the first commutation seat (51).

5. The multi-connection point loading test equipment for the subframe according to claim 1, characterized in that, It further includes a connecting rod (4). One end of the connecting rod (4) is connected to the test connection point of the subframe (2) through a first spherical bearing or a universal fixture (3), and the other end is connected to the U-shaped seat (40) on the first commutation seat (51) through a second spherical bearing (6) to form a first loading rod system; the hydraulic cylinder (10) is connected to the U-shaped seat (40) on the second commutation seat (39) through a third spherical bearing (8) to form a second loading rod system.

6. The subframe multi-connection point loading test equipment according to claim 1, characterized in that A first load sensor (5) and a second load sensor (9) are respectively provided on the first loading rod system and the second loading rod system.

7. A loading method using the subframe multi-connection point loading test equipment according to any one of claims 1-6, comprising the following steps: S1. Install the subframe (2) onto the fixed seat (1) according to the requirements of the drawing, and fix the fixed seat (1) on the test platform (14) with a pressing plate (12) or fasteners; S2. Install the commutation unit (7) of the second base (34); S3. Adjust the main shaft (46), the first commutation seat (51) and the second commutation seat (39) to the predetermined positions according to the requirements of the drawing; S4. Determine the length and quantity of the connecting rod (4) according to the requirements of the drawing; S5. Connect the first spherical bearing or universal fixture (3), the connecting rod (4), the first load sensor (5), and the second spherical bearing (6) in series and fasten them. Connect the two ends to the test connection point of the subframe (2) and the U-shaped seat (40) on the first commutation seat (51) respectively; S6. Adjust the spatial position of the connecting rod (4) on the subframe (2) side; S7. Fix the commutation unit (7) on the test platform (14) with a pressing plate (12) or fasteners; S8. Connect the third spherical bearing (8), the connecting rod (4), the second load sensor (9), and the hydraulic cylinder (10) in series. Connect the two ends to the square box (13) and the U-shaped seat (40) on the second commutation seat (39) respectively; S9. Adjust the axis of the rod system where the hydraulic cylinder (10) is located to be perpendicular to the plane of the sixth base plate (74) on the second commutation seat (39).

8. The loading method of the subframe multi-connection point loading test equipment according to claim 7, characterized in that The tools for adjusting the spatial position of the connecting rod (4) on the subframe (2) side in step S6 include an angle gauge (93), a folding ruler (90), and a level (94).

9. The loading method of the loading test equipment for the multi-connection point of the subframe according to claim 7, characterized in that, The tools for adjusting the axis of the rod system where the hydraulic cylinder (10) is located to be perpendicular to the plane of the sixth base plate (74) on the second commutation seat (39) in step S9 include an angle gauge (93), a folding ruler (90), and a level (94).

Images