Auxiliary frame control arm connection point test equipment and loading method thereof

Abstract

An auxiliary frame control arm connection point test device comprises a fixed seat, the fixed seat is provided with a first support and a second support, the first support is provided with a vertical long-strip hole, and the second support is provided with a horizontal long-strip hole; the lifting device and the worm and gear mechanism are driven by a pneumatic wrench to control the hydraulic cylinder to lift along the slideway; the telescopic end of the hydraulic cylinder is sequentially connected with a load sensor, a first connecting rod, a universal linear bearing, a second connecting rod and a second fisheye bearing, and is connected with a control arm connecting point of the auxiliary frame; and the angle adjusting device drives the right-hand thread sliding block and the left-hand thread sliding block to linearly move, so that the third connecting plate rotates around the axis of the supporting pin shaft. The auxiliary frame connecting point testing device can be universally used for auxiliary frames of different automobile types during automobile auxiliary frame control arm connecting point testing, the angle and the distance are convenient to adjust, control is easy, and the auxiliary frame connecting point testing device is worthy of being popularized and used in the industry.

Description

Technical Field

[0001] The present invention relates to the technical field of test benches, and particularly to a test device for the connection points of a subframe control arm and a loading method thereof. Background Art

[0002] The automotive suspension system is an important assembly in the automotive 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 required to be stressed 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 requirement for the development of the automotive industry.

[0004] As a key component of the automotive suspension system, the fatigue or strength verification of the subframe is crucial. A large part of the fatigue and strength tests of the subframe are carried out separately for each control arm connection point. Since the sizes of different subframes are different, corresponding test fixtures need to be designed for each subframe during each test. Moreover, the test loading directions of the loading points of each control arm of the subframe are spatial angles and are all different, and there is currently no convenient test device for adjusting the loading angle.

[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 researches and improves, and thus has the test device for the connection points of the subframe control arm and the loading method of the present invention. Summary of the Invention

[0006] In view of this, the present invention aims to provide a test device for the connection points of a subframe control arm, which can solve the problems that there are too many subframe fixing fixtures or it is difficult to adjust the loading angle in the detection test of the connection points of the automotive subframe control arm.

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

[0008] A test device for the connection point of a subframe control arm, comprising a fixed seat, on which a first support and a second support are provided. A long hole in the vertical direction is provided on the first support, and a long hole in the horizontal direction is provided on the second support; a lifting device, on which a worm and worm gear mechanism, a hydraulic cylinder, a slideway and a load sensor are provided. The worm and worm gear mechanism is driven by a pneumatic wrench to control the lifting of the hydraulic cylinder along the slideway; the telescopic end of the hydraulic cylinder is sequentially connected to the load sensor, a first connecting rod, a universal single-joint bearing, a second connecting rod and a second spherical eye bearing, and is connected to the connection point of the control arm of the subframe; an angle adjustment device, which is provided with a positive and negative thread lead screw, a positive thread slider, a negative thread slider and a bracket. The positive and negative thread lead screw is driven to rotate by a pneumatic wrench, driving the positive thread slider and the negative thread slider to move linearly, so that the third connecting plate rotates around the axis of the support pin.

[0009] In some embodiments, the lifting device and the angle adjustment device are fixedly installed on the platform and connected by fasteners.

[0010] In some embodiments, the first support includes a first bottom plate, a first reinforcing rib and a first connecting plate fixedly connected; the second support includes a second bottom plate, a second reinforcing rib and a third bottom plate fixedly connected.

[0011] In some embodiments, a slideway is provided on the base of the hydraulic cylinder. The worm and worm gear mechanism is connected to the slideway through a second connecting plate, and the second connecting plate is connected to the base of the hydraulic cylinder.

[0012] In some embodiments, the second connecting plate is adjustably connected to the bolt holes of the hydraulic cylinder base through a fourth long hole.

[0013] In some embodiments, the angle adjustment device further includes a support fixed seat, on which a circular long hole and a fifth long hole are provided. The third connecting plate is fixedly installed on the platform through the fasteners of the support fixed seat.

[0014] A loading method for a test device of the connection point of a subframe control arm, according to the above test device of the connection point of a subframe control arm, comprising the following steps:

[0015] S1. Install the subframe on the fixed seat and fix the fixed seat on the platform through a pressing plate;

[0016] S2. Connect the lifting device and the angle adjustment device through fasteners;

[0017] S3. Remove the third bearing seat and rotate the third connecting plate around the support pin;

[0018] S4. Drive the positive and negative thread lead screw to rotate through a pneumatic wrench, adjust the positions of the positive thread slider and the negative thread slider, and lock the fasteners of the support fixed seat after the hydraulic cylinder reaches the preset loading angle;

[0019] S5. Install a straightening device to ensure that the first connecting rod, the second connecting rod and the hydraulic cylinder are coaxial;

[0020] S6. Adjust the worm and worm gear mechanism to connect the hydraulic cylinder to the test point lug of the subframe;

[0021] S7. Remove the straightening device and fix the angle adjustment device to the platform through the pressure plate.

[0022] In some embodiments, in step S4, the vertical angle of the hydraulic cylinder is monitored by a spirit level, and in step S6, the horizontal plane angle of the angle adjustment device is calibrated by an angle gauge.

[0023] In some embodiments, step S6 includes: removing the fasteners of the second connecting plate, driving the worm and worm gear mechanism by a pneumatic wrench to adjust the position of the hydraulic cylinder, and re-locking after connecting the second spherical bearing to the lug of the subframe.

[0024] In some embodiments, the loading angle is adjusted bidirectionally by the positive thread and the reverse thread of the screw of the positive and reverse screw, so as to realize the continuous angle control of the third connecting plate.

[0025] Compared with the prior art, the subframe control arm connection point test equipment and its loading method of the present invention have the following advantages:

[0026] The subframe control arm connection point test equipment and its loading method disclosed by the present invention can not only be used for different models of subframes during the test of the subframe control arm connection point of an automobile, but also are convenient for adjusting the angle and distance, easy to control, and worthy of popularization and use in the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0028] Figure 1 It is an overall schematic diagram of a subframe control arm connection point test equipment of the present invention.

[0029] Figure 2 It is a schematic diagram of the fixed seat structure of a subframe control arm connection point test equipment of the present invention.

[0030] Figure 3 It is a partial exploded schematic diagram of the fixed seat of a subframe control arm connection point test equipment of the present invention.

[0031] Figure 4 It is a combined schematic diagram of the lifting device and the angle adjustment device of a subframe control arm connection point test equipment of the present invention.

[0032] Figure 5 Schematic diagram of the lifting device of a test equipment for the connection point of the subframe control arm of the present invention

[0033] Figure 6 Overall structure schematic diagram of the angle adjustment device of a test equipment for the connection point of the subframe control arm of the present invention

[0034] Figure 7 Partial structure decomposition schematic diagram of the angle adjustment device of a test equipment for the connection point of the subframe control arm of the present invention

[0035] Figure 8 Overall structure schematic diagram of the flipping unit of a test equipment for the connection point of the subframe control arm of the present invention

[0036] Figure 9 Decomposition structure schematic diagram of the flipping unit of a test equipment for the connection point of the subframe control arm of the present invention

[0037] Figure 10 Overall and decomposition structure schematic diagrams of the support unit of a test equipment for the connection point of the subframe control arm of the present invention

[0038] Figure 11 Structure schematic diagram of the straightening device of a test equipment for the connection point of the subframe control arm of the present invention.

[0039] Explanation of reference numerals

[0040] 1 - Fixed seat; 2 - Subframe; 3 - Straightening device; 4 - Level; 5 - Pneumatic wrench; 6 - Lifting device; 7 - Platform; 8 - Angle adjustment device; 9 - Pressure plate; 10 - Angle gauge; 11 - First support; 12 - Second support; 13 - First base; 14 - First reinforcing rib; 15 - First bottom plate; 16 - First connecting plate; 17 - First bolt hole; 18 - Second bottom plate; 19 - First long hole; 20 - Second reinforcing rib; 21 - Third bottom plate; 22 - Second long hole; 23 - Fourth bottom plate; 24 - Third long hole; 25 - First vertical plate; 26 - Fourth long hole; 27 - Third reinforcing rib; 28 - Second vertical plate; 29 - First lifting hole; 30 - First sleeve; 31 - Worm and worm gear mechanism; 32 - Hydraulic cylinder base; 33 - First spherical bearing; 34 - First bolt hole; 35 - Second connecting plate; 36 - Fourth long hole; 37 - Hydraulic cylinder; 38 - Load sensor; 39 - First connecting rod; 40 - First nut; 41 - Universal single - word bearing; 42 - Second spherical bearing; 43 - Second nut; 44 - Second connecting rod; 45 - Slideway; 46 - Second bolt hole; 106 - Second connecting plate fastener; 47 - Support fixed seat; 48 - Support unit; 49 - Fifth bottom plate; 50 - Third connecting plate; 51 - Flipping unit; 52 - Third vertical plate; 53 - Circular long hole; 54 - Fourth reinforcing rib; 55 - Second lifting hole; 56 - Sixth bottom plate; 57 - Fifth long hole; 58 - Third lifting hole; 59 - Support unit threaded hole; 60 - Lifting device bolt hole; 61 - Flipping unit countersunk bolt hole; 62 - Support fixed seat threaded hole; 63 - Support fixed seat fastener; 64 - Second sleeve; 65 - First bearing seat; 66 - First bearing seat fastener; 67 - First pin shaft; 68 - First external circlip; 69 - Positive - threaded slider; 70 - Positive and negative threaded lead screw; 71 - Bracket; 72 - Second pin shaft; 73 - Second external circlip; 74 - Connection seat; 75 - Reverse - threaded slider; 76 - Hexagonal structure; 77 - First bearing installation section; 78 - First semi - ring self - lubricating bearing; 79 - First self - lubricating bearing installation hole; 80 - First bearing seat bolt hole; 81 - Positive - threaded hole; 82 - First pin shaft hole; 83 - Second pin shaft hole; 84 - Connection seat fastener; 85 - Connection seat threaded hole; 86 - Third pin shaft hole; 87 - Fourth pin shaft hole; 88 - Fifth reinforcing rib; 89; Bracket side plate; 90 - Lead screw positive - thread; 91 - Lead screw reverse - thread; 92 - Second bearing seat; 93 - Second bearing seat fastener; 94 - Second self - lubricating bearing installation hole; 95 - Support rod; 96 - Support rod bolt; 97 - Support pin shaft; 98 - Second semi - ring self - lubricating bearing; 99 - Third self - lubricating bearing installation hole; 100 - Third bearing seat; 101 - Third bearing seat fastener; 102 - Second bearing installation section; 103 - Clamping block; 104 - Fourth connecting plate. Detailed implementation manners

[0041] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0042] Next, the technical solutions of the present invention will be clearly and completely described with reference to the accompanying drawings and in combination with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0043] Next, refer to Figures 1 to 11 and describe the subframe control arm connection point test equipment of the embodiments of the present invention in combination with the embodiments.

[0044] A subframe control arm connection point test equipment includes a fixed seat 1, which is provided with a long hole 19 in the vertical direction, and the second support 12 on the fixed seat 1 is provided with a long hole 22 in the horizontal direction, which can be adapted to the subframes 2 of different vehicle models; a lifting device 6, which can make the hydraulic cylinder 37 rise or fall along the slideway 45 under the action of the pneumatic wrench 5 through the worm and worm gear mechanism 31. The telescopic end of the hydraulic cylinder 37 is connected to the load sensor 38, and is connected to the corresponding control arm connection point on the subframe 2 through the first connecting rod 39, the second connecting rod 44, the universal one-way bearing 41, the second fish-eye bearing 42; an angle adjustment device 8, which controls the rotation of the positive and negative screw rod 70 with the pneumatic wrench 5, converts it into the linear motion of the positive thread slider 69 and the negative thread slider 75, and drives the bracket 71 to control the third connecting plate 50 to rotate around the axis of the support pin 97 of the side support unit 48.

[0045] The fixed seat 1 is provided with a long hole 19 in the vertical direction, and the second support 12 on the fixed seat 1 is provided with a long hole 22 in the horizontal direction, so that it can be adapted to the subframes 2 of different vehicle models. The lifting device 6 uses the pneumatic wrench 5 to control the worm and worm gear mechanism 31, which is fast and labor-saving. The angle adjustment device 8 uses the pneumatic wrench 5 to control the positive and negative screw rod 70, which is fast and labor-saving. The angle adjustment device 8 uses semi-circular self-lubricating bearings 78, 98, which have strong bearing capacity and save space. The positive and negative screw rod 70 uses a half positive thread 90 and a general negative thread 91, which can make the positive thread slider 69 and the negative thread slider 75 move inwards or outwards at the same time. The positive and negative screw rod 70, the positive thread slider 69, the negative thread slider 75, the bracket 71, the connecting seat 74, and the third connecting plate 50 form a link mechanism to realize the flipping of the third connecting plate 50 and realize angle adjustment. The support fixed seat 47 uses a circular long hole 53 with the axis of the support pin 97 as the center, which can realize the stepless adjustment of the angle of the third connecting plate 50.

[0046] As Figure 1The figure shows a schematic structural diagram of the test equipment for the connecting points of the control arms of 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 platform 7 by a pressing plate 9. The lifting device 6 and the angle adjustment device 8 are connected by fasteners. After adjusting the corresponding positions, the lifting device 6 is connected to the corresponding test positions of the subframe 2 by fasteners and corresponding fixtures. The angle adjustment device 8 is fixed to the platform 7 by a pressing plate 9.

[0047] As Figure 2 、 Figure 3 The figure shows a schematic overall structural diagram of the fixed seat of the present invention. As Figure 3 The figure shows a partial exploded schematic diagram of the fixed seat of the present invention. The first support 11 is welded and composed of one first bottom plate 15, two first reinforcing ribs 14, and one first connecting plate 16. Corresponding fasteners are passed through the first bolt holes 17 and the first long holes 19 on the second support 12 for fastening. The second support 12 is welded and composed of one second bottom plate 18, two second reinforcing ribs 20, and one third bottom plate 21. Corresponding fasteners are passed through the second long holes 22 and the fourth long holes 26 on the first vertical plate 25 for fastening. The first base 13 is welded and composed of one fourth floor 23, one second vertical plate 28, two first vertical plates 25, and two third reinforcing ribs 27. The third long hole 24 is used to pass through fasteners and connect and fasten with the platform 7. A first lifting hole 29 is provided on the second vertical plate 28. The combination of the first long hole 19, the second long hole 22, and the fourth long hole 26 can make the fixed seat 1 adapt to subframes 2 of different sizes.

[0048] As Figure 4 、 Figure 5As shown, a slideway 45 is vertically arranged on the side surface of the hydraulic cylinder base 32. The slideway 45 is installed on the hydraulic cylinder base 32 with fasteners. A second connecting plate 35 is arranged between the slideway 45 and the hydraulic cylinder base 32. A worm and worm gear mechanism 31 is installed on the top of the hydraulic cylinder base 32 with fasteners. The bottom of the worm and worm gear mechanism 31 is connected to the second connecting plate 35 through a first spherical bearing 33 and corresponding fasteners. The worm and worm gear mechanism 31 can control the up and down movement of the second connecting plate 35. After the second connecting plate 35 moves to a suitable position, a second connecting plate fastener 106 is passed through a fourth long hole 36 and fixed at a corresponding first bolt hole 34 position of the hydraulic cylinder base 32. A hydraulic cylinder 37 is connected to the middle of the second connecting plate 35 with fasteners. A hexagonal structure for installing a first sleeve 30 is arranged at the input force position of the worm and worm gear mechanism 31. The other end of the first sleeve 30 can install a pneumatic wrench 5. By starting the wrench 5, the up and down movement of the second connecting plate 35 can be controlled. A number of second bolt holes 46 are arranged at the bottom of the hydraulic cylinder base 32, and fasteners can be passed through the second bolt holes 46 to connect with an angle adjustment device 8. A load sensor 38 is arranged at the end of the hydraulic cylinder 37. The other end of the load sensor 38 is connected to a first connecting rod 39 with fasteners. The other end of the first connecting rod 39 is connected with a universal single-direction bearing 41 by thread and locked with a first nut 40. The other end of the universal single-direction bearing 41 is connected with a second connecting rod 44 by thread. The other end of the second connecting rod 44 is connected with a second spherical bearing 42 by thread and locked with a second nut 43. The universal single-direction bearing 41 and the second spherical bearing 42 together form a two-force bar structure. The load sensor 38 can also be installed between the universal single-direction bearing 41 and the second spherical bearing 42 by changing corresponding connecting rods or fasteners. The second spherical bearing 42 is connected to the subframe 2 with corresponding blocks and fasteners. If a universal bushing or ball joint is installed at the test point position of the subframe 2 itself, the second spherical bearing 42 can be replaced with a corresponding fixture and connected with the bushing or ball joint.

[0049] As Figure 6 shown, the angle adjustment device 8 mainly consists of a support fixing seat 47, a support unit 48, a fifth bottom plate 49, a third connecting plate 50, and a flipping unit 51.

[0050] As Figure 7As shown, the support fixing base 47 is composed of a third vertical plate 52, two fourth reinforcing ribs 54, and a sixth bottom plate 56 welded together. A circular long hole 53 is provided in the third vertical plate 52, and the center of the circular long hole 53 is on the rotation axis of the support unit 48. After the third connecting plate 50 is flipped to a predetermined position, the support fixing base 47 and the third connecting plate 50 are fixed by passing a support fixing base fastener 63 through the circular long hole 53. A second lifting hole 55 is provided in the fourth reinforcing rib 54 for convenient lifting. A fifth long hole 57 is provided in the sixth bottom plate 56 to facilitate the fixation of the support fixing base 47 and the platform 7 through fasteners. The flipping unit 51 is fixed at the middle part of the fifth bottom plate through corresponding fasteners, and at the same time, the top of the flipping unit 51 is connected to the flipping unit counterbore hole in the middle part of the third connecting plate 50 through relevant fasteners. The four corners of the fifth bottom plate 49 are fixed with support units 48 through fasteners, and the support units 48 are connected to the support unit threaded holes 59 on the side of the third connecting plate 50 through corresponding fasteners. It should be noted that when the third connecting plate 50 needs to be flipped around the two support units 48 on one side, the upper third bearing seat 100 of the support units 48 on the other side needs to be removed.

[0051] As Figure 8 , Figure 9 shown, first bearing seats 65 are placed on both sides of the middle of the fifth bottom plate 49. The first semi-ring self-lubricating bearing 78 is placed in the corresponding first self-lubricating bearing mounting hole 79 of the first bearing seat 65. The outer diameter of the first semi-ring self-lubricating bearing 78 and the inner diameter of the first self-lubricating bearing mounting hole 79 are in clearance fit. The first bearing mounting sections 77 on both sides of the positive and negative thread screw 70 are placed at the inner hole position of the first semi-ring self-lubricating bearing 78. The outer diameter of the first bearing mounting section 77 and the inner hole of the first semi-ring self-lubricating bearing 78 are in clearance fit. The diameter of the first bearing mounting section 77 is smaller than both sides, forming a shaft shoulder, which can limit the movement of the positive and negative thread screw 70 on the axis after the first semi-ring self-lubricating bearing 78 is fixed. Another first semi-ring self-lubricating bearing 78 is placed above the first bearing mounting section 77, and then a first bearing seat 65 is placed above the uppermost first semi-ring self-lubricating bearing 78. The two first bearing seats 65 on the same side are fixed to the corresponding threaded holes on the fifth bottom plate 49 with first bearing seat fasteners 66. Hexagonal structures 76 are provided on both sides of the positive and negative thread screw 70, so that the second sleeve 64 can be installed at this position, and the positive and negative thread screw 70 can be rotated through the pneumatic wrench 5.

[0052] As Figure 8 , Figure 9As shown below, the following installation is completed before the first bearing block 65 for the left - and - right - hand screw 70 is fixed. At an appropriate position on the right - hand thread 90 of the left - and - right - hand screw 70, a right - hand thread slider 69 is screwed in, and at an appropriate position on the left - hand thread 91 of the left - and - right - hand screw 70, a left - hand thread slider 75 is screwed in. The bracket 71 is welded by two bracket side plates 89 and one fifth reinforcing rib 88. The distance between the two bracket side plates 89 and the corresponding installation positions of the right - hand thread slider 69 and the left - hand thread slider 75 are in clearance fit. The two brackets 71 are respectively installed at the corresponding positions of the right - hand thread slider 69 and the left - hand thread slider 75. The first pin 67 passes through the fourth pin hole 87 on the bracket 71 and the first pin holes 82 on the right - hand thread slider 69 and the left - hand thread slider 75. The relevant pin holes are in clearance fit. At appropriate positions on both sides of the first pin 67, snap - ring grooves are provided, and first external snap - rings 68 are installed on the snap - ring grooves to prevent the first pin 67 from axially moving. The second pin 72 passes through the second pin hole 83 at the bottom of the connecting seat 74. The corresponding holes are in clearance fit. At the corresponding position on the second pin 72, a snap - ring groove is provided and a second external snap - ring 73 is installed on the snap - ring groove to prevent the second pin 72 from axially moving. The other side of the bracket 71 is installed at the corresponding positions at both ends of the second pin 72. The mating part is in clearance fit. The first pin 67 passes through the fourth pin hole 87 on the bracket 71 and the third pin holes 86 on both sides of the second pin 72. The relevant pin holes are in clearance fit. At appropriate positions on both sides of the first pin 67, snap - ring grooves are provided, and first external snap - rings 68 are installed on the snap - ring grooves to prevent the first pin 67 from axially moving. After adjusting the right - hand thread slider 69 and the left - hand thread slider 75 to appropriate positions, the left - and - right - hand screw 70 is fixed by the first bearing block 65 through the first bearing block fastener 66.

[0053] As Figure 10As shown, second bearing seats 92 are fixed at the four corners of the fifth bottom plate 49 with second bearing seat fasteners 93. In the middle of the upper part of the second bearing seat 92, there is a second self-lubricating bearing mounting hole 94. The second semi-ring self-lubricating bearing 98 is placed into the second self-lubricating bearing mounting hole 94. On both sides of the second self-lubricating bearing mounting hole 94, there are shoulders to prevent axial movement of the second semi-ring self-lubricating bearing 98. In the middle of the support pin shaft 97, there is a second bearing mounting section 102 with a diameter smaller than that of both ends. The second bearing mounting section 102 is placed into the hole of the second semi-ring self-lubricating bearing 98 above the second bearing seat 92. The inner and outer diameters of the second semi-ring self-lubricating bearing 98 are in clearance fit with related parts. The second semi-ring self-lubricating bearing 98 is placed above the support pin shaft 97. Since the diameter of the second bearing mounting section 102 is smaller than that of both ends of the support pin shaft 97, the formed shoulders can prevent axial movement of the support pin shaft 97. In the middle of the third bearing seat 100, there is a third self-lubricating bearing mounting hole 99 for mounting the second semi-ring self-lubricating bearing 98. On both sides of the third self-lubricating bearing mounting hole 99, there are also shoulders to prevent axial movement of the second semi-ring self-lubricating bearing 98. The support pin shaft 97 and the second semi-ring self-lubricating bearing 98 are fixed on the second bearing seat 92 with the third bearing seat fastener 101 passing through the corresponding bolt holes of the third bearing seat 100. The support rod bolt 96 passes through the middle bolt hole of the support rod 95 and the corresponding bolt holes on both sides of the support pin shaft 97.

[0054] As Figure 7 , Figure 9 , Figure 10 shown, the third connecting plate 50, the support rod 95, and the third bearing seat 100 are fixed with the support rod bolt 96 passing through the side support unit bolt hole 59 of the third connecting plate 50. The third connecting plate 50 and the connecting seat 74 are fixed with the connecting seat fastener 84 passing through the corresponding counterbore bolt holes 61 in the middle of the third connecting plate 50. Thus, the angle adjustment device 8 is assembled.

[0055] As Figure 11 shown, the straightening device 3 is composed of a fourth connecting plate 104 and two clamping blocks 103 welded together. On the clamping blocks 103, there are semi-circular holes with a clearance fit with the outer diameters of the first connecting rod 39 and the second connecting rod 44. The two straightening devices 3 are respectively clamped on the first connecting rod 39 and the second connecting rod 44, and are locked with corresponding fasteners passing through the corresponding bolt holes on the two clamping blocks 103. In this way, it can be ensured that the second connecting rod 44 and the first connecting rod 39 are in a straight line, and are also in the same straight line as the hydraulic cylinder 37.

[0056] As Figure 1 shown, the fixed seat 1 is fixed parallel to the groove line on the platform 7. Referring to the groove line on the platform 7, the angle adjustment device 8 is adjusted to the required angle position on the drawing with an angle gauge 10. Subsequently, the two straightening devices 3 can be removed. After fixing the related parts, the test can be carried out.

[0057] Please refer to Figure 1 , which shows the application schematic diagram of the test equipment for the connection point of the subframe control arm of the present invention. The loading method of the test equipment for the connection point of the subframe control arm includes:

[0058] Execute step S1: Install the subframe 2 at the required position on the fixed seat 1 according to the drawing requirements. The bottom plate of the fixed seat 1 is parallel to the groove line of the platform 7. Then, fix the fixed seat 1 at the appropriate position on the platform 7 with the pressing plate 9 or corresponding fasteners;

[0059] Execute step S2: Connect the lifting device 6 and the angle adjustment device 8 together with fasteners;

[0060] Execute step S3: According to the angle requirement, remove the third bearing seat 100 on one side so that the third connecting plate 50 can rotate around the support pin 97 on the other side;

[0061] Execute step S4: Place the level 4 above the load sensor 38, or it can also be at a position such as the first connecting rod 39 that can reflect the angle of the hydraulic cylinder 37 in the vertical direction;

[0062] Execute step S5: Ensure that the fasteners 63 of the support fixed seats on both sides of the angle adjustment device 8 are in a loosened state;

[0063] Execute step S6: Use the pneumatic wrench 5 to cooperate with the second sleeve 64 to rotate the hexagonal structure 76 on the positive and negative threaded lead screw 70, so that the positive threaded slider 69 and the negative threaded slider 75 move inwards or outwards simultaneously, thereby driving the third connecting plate 50 to rotate around the support pin 97 on one side;

[0064] Execute step S7: The level 4 reads the angle. When the hydraulic cylinder 37 reaches the required angle, lock the fasteners 63 of the support fixed seats on both sides of the angle adjustment device 8.

[0065] Execute step S8: Clamp the two straightening devices 3 around the first connecting rod 39 and the second connecting rod 44 respectively, and pass the corresponding fasteners through the corresponding bolt holes on the two holding blocks 103 and lock them. Ensure that the second connecting rod 44 and the first connecting rod 39 are in a straight line, and also in the same straight line as the hydraulic cylinder 37;

[0066] Execute step S9: Remove the second connecting plate fasteners 106 on the second connecting plate 35, and use the pneumatic wrench 5 to cooperate with the first sleeve 30 to rotate the worm and gear mechanism 31 to pull the hydraulic cylinder 37 to the required position.

[0067] Execute step S10: Connect the second spherical bearing 42 with the corresponding stoppers and the lugs at the corresponding test point positions on the subframe 2. During this process, the worm and worm gear mechanism 31 may also be slightly adjusted to make the hydraulic cylinder 37 move slightly in the vertical plane so as to connect with the lugs at the corresponding test point positions on the subframe 2, and then lock the second spherical bearing 42 and the lugs at the test point positions on the subframe 2 with fasteners;

[0068] Execute step S11: Lock the second connecting plate fasteners 103 on the second connecting plate 35.

[0069] Execute step S12: Use the angle gauge 10 to assist in adjusting the angle adjusting device 8 to reach the specified angle on the water surface on the platform 7;

[0070] Execute step S13: Remove the two straightening devices 3;

[0071] Execute step S14: Use the pressing plate 9 to fasten the support fixing seat 47 on the angle adjusting device 6 to the platform 7.

[0072] Compared with the prior art, the test equipment for the subframe control arm connection point of the present invention has the following advantages:

[0073] The test equipment for the subframe control arm connection point and its loading method disclosed by the present invention can not only be applicable to subframes of different vehicle models during the test of the subframe control arm connection point of an automobile, but also is convenient for adjusting the angle and distance, easy to control, and worthy of promotion and use in the industry.

[0074] 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 facilitating the description of 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 a limitation to the protection scope of the present invention.

[0075] 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.

[0076] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or capable of communicating with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. 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.

[0077] 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 control arm connection point test equipment, characterized in that: It includes a fixed seat, on which a first support and a second support are arranged, the first support is arranged with a long strip hole in a vertical direction, and the second support is arranged with a long strip hole in a horizontal direction; a lifting device, on which a worm gear mechanism, a hydraulic cylinder, a slideway and a load sensor are arranged, the worm gear mechanism is driven by a pneumatic wrench to control the hydraulic cylinder to rise and fall along the slideway; the telescopic end of the hydraulic cylinder is connected in sequence to the load sensor, a first connecting rod, a universal slotted bearing, a second connecting rod and a second fisheye bearing, and is connected to the control arm connection point of the sub-frame; an angle adjustment device, the angle adjustment device is provided with a positive and negative threaded screw, a positive threaded slider, a negative threaded slider and a bracket, the positive and negative threaded screw is driven to rotate by the pneumatic wrench, driving the positive threaded slider and the negative threaded slider to move linearly, so that the third connecting plate rotates around the axis of the support pin shaft.

2. The subframe control arm connection point test equipment according to claim 1, characterized in that: The lifting device and the angle adjustment device are fixedly installed on the platform and connected by fasteners.

3. The subframe control arm connection point test equipment according to claim 1, characterized in that: The first support includes a first bottom plate, a first reinforcing rib and a first connecting plate which are fixedly connected; the second support includes a second bottom plate, a second reinforcing rib and a third bottom plate which are fixedly connected.

4. The subframe control arm connection point test equipment according to claim 1, characterized in that: A slideway is arranged on the hydraulic cylinder base, the worm gear mechanism is connected to the slideway through a second connecting plate, and the second connecting plate is connected to the hydraulic cylinder base.

5. The subframe control arm connection point test equipment according to claim 4, characterized in that: The second connecting plate is adjustably connected to the bolt hole of the hydraulic cylinder base through the fourth elongated hole.

6. The subframe control arm connection point test equipment according to claim 1, characterized in that: The angle adjustment device also includes a support fixing seat, on which a round long strip hole and a fifth long strip hole are arranged, and the third connecting plate is fixedly installed on the platform through the support fixing seat fastener.

7. A loading method for a subframe control arm connection point test device, according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1. Install the subframe on the fixing seat and fix the fixing seat to the platform through a pressure plate; S2. Connect the lifting device and the angle adjustment device through fasteners; S3. Remove the third bearing seat so that the third connecting plate rotates around the support pin; S4. Use a pneumatic wrench to drive the positive and negative threaded screws to rotate, adjust the positions of the positive threaded slider and the negative threaded slider, and lock the support and fixing seat fasteners after the hydraulic cylinder reaches the preset loading angle; S5. Install a straightening device to ensure that the first connecting rod, the second connecting rod and the hydraulic cylinder are coaxial; S6. Adjust the worm gear mechanism so that the hydraulic cylinder is connected to the test point lug of the subframe; S7. Remove the straightening device and fix the angle adjustment device to the platform through a pressure plate.

8. The loading method of the subframe control arm connection point test equipment according to claim 7, characterized in that: In step S4, the vertical angle of the hydraulic cylinder is monitored by a level meter, and in step S6, the horizontal plane angle of the angle adjustment device is calibrated by an angle ruler.

9. The loading method of the subframe control arm connection point test equipment according to claim 7, characterized in that: Step S6 includes: removing the second connecting plate fastener, driving the worm gear mechanism by a pneumatic wrench to adjust the position of the hydraulic cylinder, connecting the second fisheye bearing to the ear piece of the sub-frame and then re-locking it.

10. The loading method of the subframe control arm connection point test equipment according to claim 7, characterized in that: The loading angle is adjusted in both directions through the positive thread and the negative thread of the lead screw, so as to realize continuous angle control of the third connecting plate.

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