Knuckle single-hole strength test equipment and test method

Abstract

The invention provides a steering knuckle single-hole strength test device and a test method. The steering knuckle single-hole strength testing equipment comprises a testing machine, a cross beam, a universal base, a load sensor and a connecting device, the connecting device comprises an application mode I, an application mode II and an application mode III; the first application mode comprises a first U-shaped seat, a first fisheye knuckle bearing, a second U-shaped seat, a second fisheye knuckle bearing, a first connecting rod and a test connecting piece. The second application mode comprises a first U-shaped seat, a second fisheye knuckle bearing, a first connecting rod and a test connecting piece. The third application mode comprises a pressure head and a pressure-bearing ball, the pressure head is connected with the load sensor, the bottom plane of the pressure head is in contact with one end of the pressure-bearing ball, and a central through hole of the pressure-bearing ball is connected with the test piece through a fastener. The universal base is suitable for steering knuckles of different shapes by replacing a flange plate in the universal base. The purposes of reducing the clamp manufacturing cost and improving the test efficiency are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of steering knuckle bench testing, and in particular relates to a steering knuckle single-hole strength testing device and a testing method. Background Art

[0002] The automobile steering knuckle is one of the main parts in the automobile suspension system. It is connected to the automobile's connecting rods, bearings, wheels and brake assemblies. It has the functions of bearing the front and rear loads of the automobile, supporting and driving the wheel hub to rotate, and realizing flexible steering and normal driving of the automobile. The reliability of the steering knuckle directly affects the normal driving of the automobile and the life safety of the passengers on board. In particular, the steering knuckle is subject to variable impact and fatigue loads when the car is driving. Therefore, there are higher requirements for the strength, fatigue, stiffness and various mechanical properties of the steering knuckle. Therefore, one of the most important tasks in the product development cycle is to verify whether the fatigue life and strength of the product can meet the needs of various working conditions.

[0003] With the acceleration of the development of various models and the shortening of the research and development cycle of models, it has become an urgent need for the development of the automotive industry to continuously strengthen the research and development of the steering knuckle bench test and improve the mechanical properties of the steering knuckle to meet the needs of various road conditions. Each OEM has gradually formed two verification schemes: a test bench for simulating automobile suspension and a test for each single hole of the steering knuckle. Among them, about three-quarters of the tests conducted on each single hole of the steering knuckle are strength tests. In the single-hole strength test of the steering knuckle, the loading direction of each hole is different, and the strength of some connection holes may have two or three directions. For the strength test of each connection hole, one or more sets of connecting fixing flanges must be equipped, and the fixing flange needs to be connected to the connecting plate to fix the steering knuckle for testing. This greatly increases the design and production of the fixture. Each strength test of a connection hole requires the horizontal test actuator to cooperate with the guide device to rebuild the bench, and the workload of building the bench is huge. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention provides a steering knuckle single-hole strength test device and a test method, which largely solve the problems existing in the prior art of huge workload of building a test bench and a large number of connecting flange clamps.

[0005] In a first aspect, an embodiment of the present invention provides a single-hole strength test device for a steering knuckle, comprising: a testing machine, a crossbeam, a universal base, a load sensor, and a connecting device;

[0006] The crossbeam is arranged in the middle of the testing machine, the load sensor is arranged on the crossbeam, the connecting device is used to connect the load sensor and the test piece together, and the test piece is arranged on the universal base;

[0007] The connection device includes application mode 1, application mode 2 and application mode 3;

[0008] The first application method includes a first U-shaped seat, a first fisheye joint bearing, a guide rod, a second U-shaped seat, a second fisheye joint bearing, a first connecting rod and a test connecting piece, wherein the first U-shaped seat, the first fisheye joint bearing, the guide rod, the second U-shaped seat, the second fisheye joint bearing, the first connecting rod and the test connecting piece are connected in sequence, the first U-shaped seat is connected to a load sensor, and the test connecting piece is connected to a test piece;

[0009] The second application mode includes a first U-shaped seat, a second fisheye spherical bearing, a first connecting rod and a test connecting piece, wherein the first U-shaped seat, the second fisheye spherical bearing, the first connecting rod and the test connecting piece are connected in sequence, the first U-shaped seat is connected to a load sensor, and the test connecting piece is connected to a test piece;

[0010] The third application method includes a pressure head and a pressure-bearing ball. The pressure head is connected to a load sensor. The bottom plane of the pressure head contacts one end of the pressure-bearing ball. The central through hole of the pressure-bearing ball is connected to the test piece through a fastener.

[0011] Optionally, the test connecting piece includes a third fisheye spherical bearing or a third U-shaped seat.

[0012] Optionally, the testing machine includes an upper crossbeam, a column, a lower connecting plate, bolt holes and a base;

[0013] The column is arranged on the base, the upper beam is arranged on the column, the lower connecting plate is arranged on the base, the bolt hole is arranged on the lower connecting plate, a lead screw is arranged in the column, a motor and a transmission mechanism are arranged in the base, the motor and the transmission mechanism in the base provide rotational power for the lead screw, and the rotation of the lead screw drives the movement of the beam.

[0014] Optionally, the universal base includes a first angle seat and a second angle seat, the second angle seat is arranged on the first angle seat, and the first angle seat and the second angle seat can rotate relative to each other.

[0015] Optionally, the first angle seat includes a first disk, a first inclined column and a second disk, and the first disk and the second disk are respectively arranged at two ends of the first inclined column; the second angle seat includes a third disk, a second inclined column and a fourth disk, and the third disk and the fourth disk are respectively arranged at two ends of the second inclined column; the outer diameter of the third disk is provided with a marking line, and the outer diameter of the second disk is provided with a scale line; the first disk and the fourth disk are adjusted by the relative positions of the marking lines and the scale lines to obtain the angles of the first angle seat and the second angle seat.

[0016] Optionally, the second disc is provided with a first circular elongated hole and a countersunk hole, the inner diameter of the countersunk hole and the outer diameter of the third disc are clearance-matched, and the inner diameter of the countersunk hole and the outer diameter of the third disc are matched; a plurality of second circular elongated holes are provided on the third disc, and fasteners are used to pass through the first circular elongated holes and the second circular elongated holes to fix the first angle seat and the second angle seat, a plurality of second key slots are provided on the upper surface of the fourth disc, keys are provided on the second key slots, and a first key slot is opened at the matching position of the flange and the key; the flange is placed on the fourth disc by the key; a second step is provided at the bottom of the flange, and a first step matching the second step is provided at the bottom of the pressure plate, the pressure plate presses the second step through the first step, and the fasteners pass through the bolt holes with countersunk holes and the corresponding bolt holes on the fourth disc to fix the flange, and the nuts of the fasteners do not protrude from the upper surface of the pressure plate.

[0017] Optionally, it also includes a highest point detection device, which is used to find the highest point of the pressure plate. The highest point detection device includes a first bracket and a second bracket. The first bracket includes a flat plate and a vertical plate, the flat plate and the vertical plate are fixedly connected, a second long hole is arranged on the vertical plate, and the second bracket can move in a vertical direction along the second long hole. The second bracket includes a vertical plate and a horizontal plate, the vertical plate and the horizontal plate are fixedly connected, and the fastener passes through the bolt hole and the second long hole on the vertical plate.

[0018] Optionally, the application mode 1 further includes a pressing plate, a guide mechanism and a connecting bottom plate;

[0019] The pressure plate fixes the guide mechanism and the universal base to the connecting base plate, and the connecting base plate is connected to the testing machine.

[0020] Optionally, the guide mechanism includes a connecting plate, a linear slider bearing, a connecting seat, a reinforcing steel pipe, a bottom plate, a square hollow steel section and a first long strip hole;

[0021] The bottom of the square hollow steel is welded to the bottom plate, a plurality of openings are opened in the upper middle part of the square hollow steel, reinforcing steel pipes are passed through the openings, a lifting hole is opened in the upper part of the square hollow steel, the connecting seat includes a side steel plate and a positive steel plate, the side steel plate and the positive steel plate are fixedly connected, the side steel plate and the connecting plate are fixedly connected, the linear slider bearing is fixed to the positive steel plate of the connecting seat, a guide rod is passed through the linear slider bearing, a first long hole is opened on the connecting plate, a fastener is passed through the first long hole and the center hole of the reinforcing steel pipe to fix the connecting plate and the square hollow steel.

[0022] In a second aspect, an embodiment of the present invention further provides a steering knuckle single hole strength test method, using the steering knuckle single hole strength test device described in any one of the first aspects, comprising the following steps:

[0023] S1: Select the application mode of the test equipment based on the single hole strength test direction and the test piece structure;

[0024] S2: Adjust the angle of the universal base;

[0025] S3: Measure whether the angle formed by the universal base meets the requirements;

[0026] S4: Install the test piece on the universal base and secure it with fasteners;

[0027] S5: When the second application mode is selected, the test piece and the load sensor are connected in series through the first U-shaped seat, the second fisheye spherical bearing, the first connecting rod, the third fisheye spherical bearing and the corresponding fasteners. The first connecting rod is adjusted to be vertical with a level gauge, and the crossbeam is controlled to move upward to perform a tensile test;

[0028] S6: When the third application mode is selected, the pressure head is connected to the load sensor through a thread and is locked with the fourth nut. The bottom plane of the pressure head contacts the pressure-bearing ball, and then a compression test is performed with the beam moving downward.

[0029] S7: Add a guide mechanism to the structure of application mode 1;

[0030] S7: Press the guide mechanism and the universal base;

[0031] S8: Set the load and displacement limit of the testing machine;

[0032] S9: Control the crossbeam to rise or fall until the test piece meets the test requirements;

[0033] S10: Save the load and displacement test data.

[0034] The steering knuckle single-hole strength test equipment and test method provided by the present invention replace multiple or more than ten sets of connecting and fixing flanges equipped with a steering knuckle through a universal base. Different types of steering knuckles only need to make one flange plate, and the rest of the universal base is universal, which is suitable for steering knuckles of different shapes, greatly reducing the design and production of the fixture. The universal base is used in the vertical direction to test, which greatly reduces the workload of setting up the bench. For dozens or hundreds of steering knuckles a year, a single-hole strength test project is set up to achieve the purpose of reducing the cost of fixture production and improving test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0036] Figure 1 It is an overall structural diagram of the first application mode of the present invention;

[0037] Figure 2 It is the overall structure diagram of the second application mode of the present invention;

[0038] Figure 3 It is the overall structure diagram of the third application mode of the present invention;

[0039] Figure 4 It is a structural diagram of a test device of the present invention in which an embedded ball joint structure is press-fitted at a test position;

[0040] Figure 5 It is a structural schematic diagram of the testing machine in the present invention;

[0041] Figure 6a and Figure 6b It is a structural schematic diagram of the guide mechanism in the present invention;

[0042] Figure 7a and Figure 7b It is a structural schematic diagram of the universal base in the present invention;

[0043] Figure 8a It is a schematic diagram of re-measuring the angle of the universal base;

[0044] Figure 8b It is a structural schematic diagram of the highest point detection device;

[0045] Among them: 1-testing machine, 2-guiding mechanism, 3-first U-shaped seat, 4-first pin and its fastener, 5-first fisheye joint bearing, 6-first nut, 7-second U-shaped seat, 8-second fisheye joint bearing,

[0046] 9-second pin and its fastener, 10-second nut, 11-first connecting rod, 12-third nut, 13-third fisheye spherical bearing, 14-first fastener, 15-stopper, 16-test piece, 17-universal base, 18-pressing plate, 19-highest point detection device, 20-crossbeam, 21-load sensor, 22-connecting bottom plate, 23-guide rod;

[0047] 24-fourth nut, 25-pressure head, 26-pressure bearing ball (or original ball pin);

[0048] 27-third U-shaped seat, 28-ball joint structure;

[0049] 29-upper beam, 30-upper column, 31-lower connecting plate, 32-bolt hole, 33-base.

[0050] 34-opening, 35-second fastener, 36-connecting plate, 37-fastener, 38-linear slider bearing, 39-connecting seat, 40-third fastener, 41-reinforced steel pipe, 42-lifting hole, 43-bottom plate, 44-first reinforcing rib, 45-square hollow steel, 46-first long strip hole, 47-side steel plate, 48-positive steel plate, 49-second reinforcing rib

[0051] 50-first angle seat, 51-fourth fastener, 52-second angle seat, 53-mark line, 54-scale line, 55-first disc, 56-first oblique column, 57-second disc, 58-first round long hole, 59-third disc, 60-second oblique column, 61-fourth disc, 62-fifth fastener, 63-first keyway, 64-flange,

[0052] 65-pressure plate, 66-bolt hole with countersunk hole, 67-first step, 68-positioning platform, 69-second step, 70-key, 71-second keyway, 72-second round long hole, 73-countersunk hole, 74-gap;

[0053] 75 - level, 76 - flat plate, 77 - first bracket, 78 - vertical plate, 79 - second long hole, 80 - sixth fastener, 81 - vertical plate, 82 - second bracket, 83 - horizontal plate.

[0054] Specific implementation and application methods

[0055] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0056] It should be clear that the implementation and application of the present invention are described below by specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. The present invention can also be implemented or applied through other different specific implementation and application methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0057] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. It should be understood by those skilled in the art based on the invention that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various application modes. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0058] It should also be noted that the illustrations provided in the following embodiments are only used to illustrate the basic concept of the present invention in a schematic application manner. The illustrations only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout type may also be more complicated.

[0059] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0060] This embodiment discloses a single-hole strength test device for a steering knuckle, comprising: a testing machine, a crossbeam, a universal base, a load sensor, and a connecting device;

[0061] The crossbeam is arranged in the middle of the testing machine, the load sensor is arranged on the crossbeam, the connecting device is used to connect the load sensor and the test piece together, and the test piece is arranged on the universal base;

[0062] The connection device includes application mode 1, application mode 2 and application mode 3;

[0063] The first application method includes a first U-shaped seat, a first fisheye joint bearing, a guide rod, a second U-shaped seat, a second fisheye joint bearing, a first connecting rod and a test connecting piece, wherein the first U-shaped seat, the first fisheye joint bearing, the guide rod, the second U-shaped seat, the second fisheye joint bearing, the first connecting rod and the test connecting piece are connected in sequence, the first U-shaped seat is connected to a load sensor, and the test connecting piece is connected to a test piece;

[0064] The second application mode includes a first U-shaped seat, a second fisheye spherical bearing, a first connecting rod and a test connecting piece, wherein the first U-shaped seat, the second fisheye spherical bearing, the first connecting rod and the test connecting piece are connected in sequence, the first U-shaped seat is connected to a load sensor, and the test connecting piece is connected to a test piece;

[0065] The third application method includes a pressure head and a pressure-bearing ball. The pressure head is connected to a load sensor. The bottom plane of the pressure head contacts one end of the pressure-bearing ball. The central through hole of the pressure-bearing ball is connected to the test piece through a fastener.

[0066] Optionally, the test connecting piece includes a third fisheye spherical bearing or a third U-shaped seat.

[0067] Optionally, the testing machine includes an upper crossbeam, a column, a lower connecting plate, bolt holes and a base;

[0068] The column is arranged on the base, the upper beam is arranged on the column, the lower connecting plate is arranged on the base, the bolt hole is arranged on the lower connecting plate, a lead screw is arranged in the column, a motor and a transmission mechanism are arranged in the base, the motor and the transmission mechanism in the base provide rotational power for the lead screw, and the rotation of the lead screw drives the movement of the beam.

[0069] Optionally, the universal base includes a first angle seat and a second angle seat, the second angle seat is arranged on the first angle seat, and the first angle seat and the second angle seat can rotate relative to each other.

[0070] Optionally, the first angle seat includes a first disk, a first inclined column and a second disk, and the first disk and the second disk are respectively arranged at two ends of the first inclined column; the second angle seat includes a third disk, a second inclined column and a fourth disk, and the third disk and the fourth disk are respectively arranged at two ends of the second inclined column; the outer diameter of the third disk is provided with a marking line, and the outer diameter of the second disk is provided with a scale line; the first disk and the fourth disk are adjusted by the relative positions of the marking lines and the scale lines to obtain the angles of the first angle seat and the second angle seat.

[0071] Optionally, the second disc is provided with a first circular elongated hole and a countersunk hole, the inner diameter of the countersunk hole and the outer diameter of the third disc are clearance-matched, and the inner diameter of the countersunk hole and the outer diameter of the third disc are matched; a plurality of second circular elongated holes are provided on the third disc, and fasteners are used to pass through the first circular elongated holes and the second circular elongated holes to fix the first angle seat and the second angle seat, a plurality of second key slots are provided on the upper surface of the fourth disc, keys are provided on the second key slots, and a first key slot is opened at the matching position of the flange and the key; the flange is placed on the fourth disc by the key; a second step is provided at the bottom of the flange, and a first step matching the second step is provided at the bottom of the pressure plate, the pressure plate presses the second step through the first step, and the fasteners pass through the bolt holes with countersunk holes and the corresponding bolt holes on the fourth disc to fix the flange, and the nuts of the fasteners do not protrude from the upper surface of the pressure plate.

[0072] Optionally, it also includes a highest point detection device, which is used to find the highest point of the pressure plate. The highest point detection device includes a first bracket and a second bracket. The first bracket includes a flat plate and a vertical plate, the flat plate and the vertical plate are fixedly connected, a second long hole is arranged on the vertical plate, and the second bracket can move in a vertical direction along the second long hole. The second bracket includes a vertical plate and a horizontal plate, the vertical plate and the horizontal plate are fixedly connected, and the fastener passes through the bolt hole and the second long hole on the vertical plate.

[0073] Optionally, the application mode 1 further includes a pressing plate, a guide mechanism and a connecting bottom plate;

[0074] The pressure plate fixes the guide mechanism and the universal base to the connecting base plate, and the connecting base plate is connected to the testing machine.

[0075] Optionally, the guide mechanism includes a connecting plate, a linear slider bearing, a connecting seat, a reinforcing steel pipe, a bottom plate, a square hollow steel section and a first long strip hole;

[0076] The bottom of the square hollow steel is welded to the bottom plate, a plurality of openings are opened in the upper middle part of the square hollow steel, reinforcing steel pipes are passed through the openings, a lifting hole is opened in the upper part of the square hollow steel, the connecting seat includes a side steel plate and a positive steel plate, the side steel plate and the positive steel plate are fixedly connected, the side steel plate and the connecting plate are fixedly connected, the linear slider bearing is fixed to the positive steel plate of the connecting seat, a guide rod is passed through the linear slider bearing, a first long hole is opened on the connecting plate, a fastener is passed through the first long hole and the center hole of the reinforcing steel pipe to fix the connecting plate and the square hollow steel.

[0077] In a specific embodiment, Figure 1As shown. A crossbeam 20 is provided in the middle of the testing machine 1, and a load sensor 21 is connected to the crossbeam 20 through a fastener. The first U-shaped seat 3 is connected to the load sensor 21 through a fastener, and the first fisheye joint bearing 5 is connected to the U-shaped hole in the middle of the first U-shaped seat 3 through a first pin shaft and its fastener 4. The first fisheye joint bearing 5 is connected to the guide rod 23 on the guide mechanism 2 through an external thread and is locked with a first nut 6. The first fisheye joint bearing 5 is provided here to prevent the crossbeam 20 and the guide mechanism 2 from not being able to ensure a completely vertical state of coordination, and the crossbeam 20 generates an excessive load on the guide mechanism 2 in the horizontal direction during the vertical movement, resulting in inaccurate test load or damage to the guide mechanism 2. The other end of the guide rod 23 is connected to the second U-shaped seat 7 through a threaded fastener, and the second fisheye joint bearing 8 is connected to the U-shaped hole in the middle of the second U-shaped seat 7 through a second pin shaft and its fastener 9. The second fisheye joint bearing 8 is connected to the first connecting rod 11 through an external thread and is locked with a second nut 10. The other end of the first connecting rod 11 is connected to the third fisheye joint bearing 13 by threading and locked with the third nut 12. Blocks 15 are arranged on both sides of the third fisheye joint bearing 13. The total width of the third fisheye joint bearing 13 and the block 15 on both sides is slightly smaller than the width of the fork of the test position of the test piece 16. The first fastener 14 passes through the bolt hole on the fork of the test position of the test piece 16 and the corresponding bolt holes of the third fisheye joint bearing 13 and the block 15 on both sides, and is locked according to the required torque. The test piece 16 is installed on the universal base 17 in advance by fasteners. After the above connection is completed, the first connecting rod 11 is adjusted to vertical using relevant tools such as a level 75 to ensure that the guide rod 23 is also in a vertical state. The guide mechanism 2 and the universal base 17 are fixed to the connecting bottom plate 22 by a pressing plate 18, and the connecting bottom plate is connected to the test machine 1 by fasteners. The second fisheye joint bearing 8, the first connecting rod 11, and the third fisheye joint bearing 13 together form a two-force rod structure, which will not limit the normal movement of the test part of the test piece 16. The guide mechanism 2 is mainly used to protect the load sensor 21 to prevent the load sensor 21 from being damaged by excessive horizontal force when the test load is too large or the test piece 16 is broken. Application method one can be structurally applicable to push tests in which the beam 20 moves downward, and can also be applicable to pull tests in which the beam 20 moves upward. Since the use of the guide mechanism 2 will increase the space, and the load sensor 21 is far away from the test piece 16, and there are many connecting parts in the middle, there may be a slight difference between the load displayed by the load sensor 21 and the load actually borne by the test piece 16. In actual applications, application methods two and three will be used more often, and application method one will be used when application methods two and three cannot solve the problem.

[0078] like Figure 2As shown, the structure of the second application mode of the single hole strength test equipment for the steering knuckle directly connects the second fisheye joint bearing 8 to the first U-shaped seat 3 through the first pin shaft and its fastener 4. Use the level 75 to adjust the first connecting rod 11 to be vertical. Application mode 2 is applicable to the tensile load of the upward movement of the beam 20. Since the downward movement of the beam 20 in application mode 2 may generate excessive horizontal load to damage the load sensor 21, application mode 2 can only be applied to the tensile load of the upward movement of the beam 20.

[0079] like Figure 3 As shown, the structure of the steering knuckle single hole strength test equipment application mode 3 is replaced by a pressure-bearing ball (or the original vehicle ball pin) 26 Figure 1 The third fisheye spherical bearing 13 is connected to the load sensor 21 by a threaded connection with the pressure head 25, and is locked with the fourth nut 24, so that the bottom plane of the pressure head 25 contacts the pressure-bearing ball (or the original ball pin) 26, and then the compression test of the downward movement of the beam 20 can be carried out.

[0080] like Figure 4 As shown, the corresponding test part of the test piece 16 is pressed with an embedded ball joint structure 28, and the pressure structure of this test part cannot be applied Figure 2 The test can be carried out in the third application method. Figure 1 The third fisheye spherical bearing 13 in the Figure 4 The third U-shaped seat 27 in the test piece 16 is inserted into the U-shaped hole in the third U-shaped seat 27, and the ball joint structure 28 on the test piece 16 is fastened by passing the corresponding bolt holes of the third U-shaped seat 27 and the ball joint structure 28 with a fastener. The ball joint structure 28 and the second fisheye joint bearing 8 together form a two-force rod structure. If Figure 4 If you want to do a pull test at the test position in Figure 2 The third fisheye spherical bearing 13 is replaced by Figure 4 The third U-shaped seat 27 in the middle can be used.

[0081] like Figure 5 As shown, the testing machine is based on the existing material tensile testing machine, and a lower connecting plate 31 is added. The lower connecting plate 31 is connected to the base 33 on the testing machine 1 through fasteners. The lower connecting plate 31 is provided with a plurality of bolt holes 32 for connecting Figure 1The bolt holes 32 on the lower connecting plate 31 can also be replaced by T-slots, which are connected with the T-block and the pressure plate 18. The column 30 is connected to the base 33 through fasteners. A lead screw is provided in the column 30. The motor and the transmission mechanism in the base 33 provide rotational power. The rotation of the lead screw in the column 30 can drive the beam 20 to move up and down. The upper beam 29 is fixed to the columns 30 on both sides by fasteners. A load sensor 21 is installed on the beam 20 through fasteners. The load sensor 21 and the built-in displacement sensor of the testing machine jointly monitor the test status of the test piece. The testing machine 1 is set with load and displacement limits through the test software, and the displacement limit can also be set with a mechanical limit.

[0082] Figure 6a and Figure 6b It is a schematic diagram of the structure of the guide mechanism 2. A bottom plate 43 is welded to the bottom of the square hollow steel 45, and the connection between the bottom of the square hollow steel 45 and the bottom plate 43 is welded and reinforced with reinforcing ribs 44. There are several openings 34 in the upper part of the square hollow steel 45, and reinforcing steel pipes 41 are inserted into the openings. The reinforcing steel pipes 41 have grooves at both ends and are welded and fixed to the side of the square hollow steel 45. After welding, they are polished and flat. The function of the reinforcing steel pipes 41 is to prevent the square hollow steel 45 from being crushed after the bolts are tightened. A hoisting hole 42 is opened on the upper part of the square hollow steel 45 for hoisting the guide mechanism 2. The connecting seat 39 is welded by two side steel plates 47, a positive steel plate 48, and a reinforcing rib 49. Bolt holes are opened on the side steel plate 47, and the side steel plate 47 and the two connecting plates 36 are fixed by a third fastener 40. The linear slider bearing 38 is fixed to the corresponding bolt holes of the positive steel plate 48 on the connecting seat 39 by fasteners. A guide rod 23 is inserted into the linear slider bearing 38. A first elongated hole 46 is formed on the connecting plate 36, and the vertical position can be adjusted. The second fastener 35 is passed through the first elongated hole 46 and the center hole of the reinforcing steel pipe 41 to fix the connecting plate 36 and the square hollow steel 45.

[0083] like Figure 7a and Figure 7bAs shown, the schematic diagram of the structure of the universal base 17. The first angle seat 50 is welded by the first disc 55, the first inclined column 56, and the second disc 57. Since the first inclined column 56 has a certain angle, the first disc 55 and the second disc 57 on the first angle seat 50 form a certain angle after welding. The second angle seat 52 is welded by the third disc 59, the second inclined column 60, and the fourth disc 61. Since the second inclined column 60 has a certain angle, the third disc 59 and the fourth disc 61 on the second angle seat 52 form a certain angle after welding. The second disc 57 is provided with a first circular strip hole 58 and a countersunk hole 73, and the inner diameter of the countersunk hole 73 and the outer diameter of the third disc 59 are clearance-matched. After the inner diameter of the countersunk hole 73 and the outer diameter of the third disc 59 are matched and placed, the second angle seat 52 is rotated according to the requirements of the drawing until the angle formed by the first disc 55 and the fourth disc 61 meets the requirements of the stand. The outer diameter of the third disk 59 is provided with a marking line 53, and the outer diameter of the second disk 5 is provided with a scale line 54. When the scaffold is built, the relative positions of the marking line 53 and the scale line 54 on the 3D drawing can be checked to quickly adjust the angle formed by the first disk 55 and the fourth disk 61. The third disk 59 is provided with a plurality of second round strip holes 72, and the first angle seat 50 and the second angle seat 52 are fixed by passing the fourth fastener 51 through the first round strip hole 58 and the second round strip hole 72. A plurality of second key slots 71 are provided at appropriate positions on the upper surface of the fourth disk 61, and a key 70 is placed at an appropriate position of the second key slot 71 for each angle, and a first key slot 63 is opened at the matching position of the flange 64 and the key 70. The flange 64 is placed on the fourth disk 61 through the key 70. A key connection is provided on the upper surface of the fourth disk 61 and the bottom of the flange 64, which can not only quickly adjust the position of the flange 64, but also prevent the flange 64 from rotating during the test. The bottom of the flange 64 is provided with a second step 69, and the bottom of the pressure plate 65 is provided with a first step 67 matched with the second step 69. The pressure plate 65 presses the second step 69 through the first step 67, and the fifth fastener 62 is passed through the countersunk bolt hole 66 and the corresponding bolt hole on the fourth disc 61 to fix the flange 64. The nut of the fifth fastener 62 should not protrude from the upper surface of the pressure plate 65 to prevent interference with the test piece.

[0084] according to Figure 7a and Figure 7b After assembling the universal base 17, follow Figure 8aRe-measure the angle formed by the universal base 17 to see if it meets the requirements. The maximum angle that the universal base 17 can form is the sum of the angles of the first angle seat 50 and the second angle seat 52. For example, if the angle of the first angle seat 50 is 22.5° and the angle of the second angle seat 52 is 22.5°, then the angle that the universal base 17 can form is 0-45°. After placing the universal base 17 horizontally, use the highest point detection device 19 to find the highest point of the pressure plate 65, and use the level 75 to quickly measure the angle of the universal base 17 along the highest point found and the center of the flange 64 to see if it meets the requirements. Figure 8b As shown, the highest point detection device 19 is composed of a first bracket 77 and a second bracket 82, which are assembled with a sixth fastener 80. The flat plate 76 and the vertical plate 78 are welded to form the first bracket 77, and the vertical plate 78 is processed with a second long hole 79, and the second bracket 82 can move in the vertical direction along the second long hole 79. The vertical plate 81 and the horizontal plate 83 are welded to form the second bracket 82. The sixth fastener 80 passes through the corresponding bolt holes and the second long hole 79 on the vertical plate 81 to fasten the first bracket 77 and the second bracket 82. After loosening the sixth fastener 80, the second bracket 82 can move in the vertical direction along the second long hole 79 until the highest point of the pressure plate 65 is found, and the sixth fastener 80 is locked.

[0085] This embodiment also discloses a steering knuckle single hole strength test method, using the steering knuckle single hole strength test equipment disclosed in this embodiment, including the following steps:

[0086] S1: Determine whether the single hole strength test direction of the test piece is tension or compression. For the tension direction, select application method 2. For the compression direction, if the test part of the test piece can be connected with an exposed ball pin or spherical fixture, select application method 3. If the test part of the test piece is an embedded ball joint or bushing, select application method 1.

[0087] S2: Adjust the angle of the universal base 17. Rotate the second angle seat 52 according to the requirements of the drawing until the angle formed by the first disc 55 and the fourth disc 61 meets the requirements of the test bench. The outer diameter of the third disc 59 is provided with a marking line 53, and the outer diameter of the second disc 57 is provided with a scale line 54. When the test bench is built, the relative positions of the marking lines 53 and the scale lines 54 on the 3D drawing can be checked to quickly adjust the angle formed by the first disc 55 and the fourth disc 61. Place the key 70 in the second key slot 71 corresponding to the current test position, and place the first key slot 63 of the flange 64 that meets the current test into the key 70 position. Tighten the bolts at various locations of the universal base 17;

[0088] S3: Use the highest point detection device 19 and the level 75 to re-measure whether the angle formed by the universal base 17 meets the requirements;

[0089] S4: Install the test piece 16 on the universal base 17 and fix it with fasteners;

[0090] S5: When the second application mode is selected, the first U-shaped seat 3, the second fisheye spherical bearing 8, the first connecting rod 11, the third fisheye spherical bearing 13 are connected in series with the test piece 16 and the load sensor 21 with corresponding fasteners, and the first connecting rod 11 is adjusted to be vertical with the level 75, and the crossbeam 20 is controlled to move upward to perform the tensile test;

[0091] S6: When the third application mode is selected, the third fisheye joint bearing 13 is replaced by the pressure ball 26 (or the original ball pin), the pressure head 25 is connected to the load sensor 21 through threads, and is locked with the fourth nut 24, and the bottom plane of the pressure head 25 is contacted with the pressure ball 26, and then the compression test of the downward movement of the beam 20 can be carried out.

[0092] S7: If the compression test of application method 3 cannot solve the problem, use application method 1. Add a guide mechanism 2 to the structure of application method 1, connect the load sensor 21 through the first U-shaped seat 3 and the first fisheye joint bearing 5 on the top of the guide mechanism 2, and connect the test piece 16 through the second U-shaped seat 7, the second fisheye joint bearing 8, the first connecting rod 11, and the third fisheye joint bearing 13 with fasteners on the bottom of the guide mechanism 2, and adjust the first connecting rod 11 to be vertical with a level 75;

[0093] S7: Use the pressing plate 18 to press the guide mechanism 2 and the universal base 17;

[0094] S8: Set the load and displacement limit of the testing machine 1;

[0095] S9: Control the crossbeam 20 to rise or fall through the test software until the test piece 16 meets the test requirements;

[0096] S10: Save the load and displacement test data.

[0097] The basic principle of the present invention is described above in conjunction with specific embodiments. However, it should be pointed out that the advantages, strengths, effects, etc. mentioned in the present invention are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. must be possessed by each embodiment of the present invention. In addition, the specific details disclosed above are only for the purpose of illustration and facilitation of understanding, rather than limitation, and the above details do not limit the present invention to being implemented by adopting the above specific details.

[0098] In the present invention, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. The block diagrams of the devices, devices, equipment, and systems involved in the present invention are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the application mode shown in the block diagram. As will be appreciated by those skilled in the art, these devices, devices, equipment, and systems can be connected, arranged, and configured in any application mode. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0099] Additionally, as used herein, "or" used in a list of items beginning with "at least one" indicates a separate list, so that, for example, a list of "at least one of A, B, or C" means A or B or C, or AB or AC or BC, or ABC (i.e., A and B and C). Furthermore, the word "exemplary" does not mean that the example described is preferred or better than other examples.

[0100] It should also be noted that in the system and method of the present invention, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present invention.

[0101] Various changes, substitutions, and modifications of the techniques described herein may be made without departing from the teachings defined by the appended claims. Furthermore, the scope of the claims of the present invention is not limited to the specific aspects of the processes, machines, manufactures, compositions of events, means, methods, and actions described above. Currently existing or later to be developed processes, machines, manufactures, compositions of events, means, methods, or actions that perform substantially the same functions or achieve substantially the same results as the corresponding aspects described herein may be utilized. Thus, the appended claims include such processes, machines, manufactures, compositions of events, means, methods, or actions within their scope.

[0102] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present invention. Therefore, the present invention is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0103] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present invention to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A single hole strength test equipment for a steering knuckle, characterized in that: include: Testing machine, crossbeam, universal base, load cell and connection device; The crossbeam is arranged in the middle of the testing machine, the load sensor is arranged on the crossbeam, the connecting device is used to connect the load sensor and the test piece together, and the test piece is arranged on the universal base; The connection device includes application mode 1, application mode 2 and application mode 3; The first application method includes a first U-shaped seat, a first fisheye joint bearing, a guide rod, a second U-shaped seat, a second fisheye joint bearing, a first connecting rod and a test connecting piece, wherein the first U-shaped seat, the first fisheye joint bearing, the guide rod, the second U-shaped seat, the second fisheye joint bearing, the first connecting rod and the test connecting piece are connected in sequence, the first U-shaped seat is connected to a load sensor, and the test connecting piece is connected to a test piece; The second application mode includes a first U-shaped seat, a second fisheye spherical bearing, a first connecting rod and a test connecting piece, wherein the first U-shaped seat, the second fisheye spherical bearing, the first connecting rod and the test connecting piece are connected in sequence, the first U-shaped seat is connected to a load sensor, and the test connecting piece is connected to a test piece; The third application method includes a pressure head and a pressure-bearing ball. The pressure head is connected to a load sensor. The bottom plane of the pressure head contacts one end of the pressure-bearing ball. The central through hole of the pressure-bearing ball is connected to the test piece through a fastener.

2. The steering knuckle single hole strength test equipment according to claim 1, characterized in that: The test connecting piece includes a third fisheye spherical bearing or a third U-shaped seat.

3. The steering knuckle single hole strength test equipment according to claim 1, characterized in that: The testing machine comprises an upper crossbeam, a column, a lower connecting plate, bolt holes and a base; The column is arranged on the base, the upper beam is arranged on the column, the lower connecting plate is arranged on the base, the bolt hole is arranged on the lower connecting plate, a lead screw is arranged in the column, a motor and a transmission mechanism are arranged in the base, the motor and the transmission mechanism in the base provide rotational power for the lead screw, and the rotation of the lead screw drives the movement of the beam.

4. The single hole strength testing equipment for steering knuckle according to claim 1, characterized in that: The universal base includes a first angle seat and a second angle seat, wherein the second angle seat is arranged on the first angle seat, and the first angle seat and the second angle seat can rotate relative to each other.

5. The single hole strength testing equipment for steering knuckle according to claim 4, characterized in that: The first angle seat includes a first disc, a first inclined column and a second disc, and the first disc and the second disc are respectively arranged at two ends of the first inclined column. The second angle seat includes a third disc, a second inclined column and a fourth disc, and the third disc and the fourth disc are respectively arranged at two ends of the second inclined column. The outer diameter of the third disc is provided with a marking line, and the outer diameter of the second disc is provided with a scale line. The first disc and the fourth disc are adjusted by the relative positions of the marking lines and the scale lines to obtain the angles of the first angle seat and the second angle seat.

6. The single hole strength testing equipment for steering knuckle according to claim 5, characterized in that: The second disc is provided with a first circular long hole and a countersunk hole, the inner diameter of the countersunk hole and the outer diameter of the third disc are clearance-matched, and the inner diameter of the countersunk hole and the outer diameter of the third disc are matched; a plurality of second circular long holes are provided on the third disc, and fasteners are used to pass through the first circular long holes and the second circular long holes to fix the first angle seat and the second angle seat, a plurality of second key slots are provided on the upper surface of the fourth disc, keys are provided on the second key slots, and a first key slot is opened at the matching position of the flange and the key; the flange is placed on the fourth disc by the key; a second step is provided at the bottom of the flange, and a first step matching the second step is provided at the bottom of the pressure plate, the pressure plate presses the second step through the first step, and the fasteners pass through the bolt holes with countersunk holes and the corresponding bolt holes on the fourth disc to fix the flange, and the nuts of the fasteners do not protrude from the upper surface of the pressure plate.

7. The single hole strength test equipment for steering knuckle according to claim 6, characterized in that: It also includes a highest point detection device, which is used to find the highest point of the pressure plate. The highest point detection device includes a first bracket and a second bracket. The first bracket includes a flat plate and a vertical plate, the flat plate and the vertical plate are fixedly connected, a second long hole is arranged on the vertical plate, and the second bracket can move in a vertical direction along the second long hole. The second bracket includes a vertical plate and a horizontal plate, the vertical plate and the horizontal plate are fixedly connected, and a fastener passes through the bolt hole and the second long hole on the vertical plate.

8. The single hole strength testing equipment for steering knuckle according to claim 1, characterized in that: The first application method also includes a pressing plate, a guide mechanism and a connecting bottom plate; The pressure plate fixes the guide mechanism and the universal base to the connecting base plate, and the connecting base plate is connected to the testing machine.

9. The single hole strength testing equipment for steering knuckle according to claim 8, characterized in that: The guide mechanism comprises a connecting plate, a linear slider bearing, a connecting seat, a reinforcing steel pipe, a bottom plate, a square hollow steel section and a first long strip hole; The bottom of the square hollow steel is welded to the bottom plate, a plurality of openings are opened in the upper middle part of the square hollow steel, reinforcing steel pipes are passed through the openings, a lifting hole is opened in the upper part of the square hollow steel, the connecting seat includes a side steel plate and a positive steel plate, the side steel plate and the positive steel plate are fixedly connected, the side steel plate and the connecting plate are fixedly connected, the linear slider bearing is fixed to the positive steel plate of the connecting seat, a guide rod is passed through the linear slider bearing, a first long hole is opened on the connecting plate, a fastener is passed through the first long hole and the center hole of the reinforcing steel pipe to fix the connecting plate and the square hollow steel.

10. A single hole strength test method for a steering knuckle, characterized in that: The single hole strength test equipment for the steering knuckle according to any one of claims 1 to 9 comprises the following steps: S1: Select the application mode of the test equipment based on the single hole strength test direction and the test piece structure; S2: Adjust the angle of the universal base; S3: Measure whether the angle formed by the universal base meets the requirements; S4: Install the test piece on the universal base and secure it with fasteners; S5: When the second application mode is selected, the test piece and the load sensor are connected in series through the first U-shaped seat, the second fisheye spherical bearing, the first connecting rod, the third fisheye spherical bearing and the corresponding fasteners. The first connecting rod is adjusted to be vertical with a level gauge, and the crossbeam is controlled to move upward to perform a tensile test; S6: When the third application mode is selected, the pressure head is connected to the load sensor through a thread and is locked with the fourth nut. The bottom plane of the pressure head contacts the pressure-bearing ball, and then a compression test is performed with the beam moving downward. S7: Add a guide mechanism to the structure of application mode 1; S7: Press the guide mechanism and the universal base; S8: Set the load and displacement limit of the testing machine; S9: Control the crossbeam to rise or fall until the test piece meets the test requirements; S10: Save the load and displacement test data.

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