Static pressure technology-based commercial axle steering knuckle retarding force test equipment

Abstract

The invention relates to the field of commercial axle steering knuckle retarding force testing, and discloses commercial axle steering knuckle retarding force testing equipment based on a static pressure technology, and the commercial axle steering knuckle retarding force testing equipment comprises a vertical loading mechanism, a gantry bearing frame, a plane guiding mechanism, a horizontal loading mechanism, a multi-degree-of-freedom static pressure rotary table and a cast iron testing platform, the commercial axle is connected with the front spherical hinge through the axle connecting tool and screws, and is used for vertical loading of the commercial axle. A layer of high-pressure oil film is formed among the piston rod, the cylinder barrel and the front cylinder cover by adopting a static pressure supporting technology, so that the piston rod is suspended in oil, the mechanical friction resistance is reduced, and the friction force borne by the steering knuckle in the testing process can be ensured to be closer to the actual use condition; the accuracy and authenticity of a test result are greatly improved, and meanwhile, the reliability of load data is further ensured by high-precision measurement of the load sensor, so that the test data is more comprehensive and accurate.

Description

Technical Field

[0001] The invention relates to the technical field of commercial vehicle axle steering knuckle resistance force testing, in particular to commercial vehicle axle steering knuckle resistance force testing equipment based on static pressure technology. Background Art

[0002] The axle knuckle plays an extremely important role in commercial vehicles. It is a key component of the suspension and steering system, facilitating steering, supporting the wheel and tire assembly, and bearing the weight of the vehicle. The knuckle acts as the pivot point for the wheel, making steering possible. It connects the wheel hub or spindle to the suspension components. The performance of the steering knuckle of a commercial vehicle axle directly affects the vehicle's handling and safety, so the test of its blocking force is crucial. Traditional test equipment usually uses mechanical loading and guiding methods, but due to the large friction between mechanical parts, the test results often cannot truly reflect the performance in actual use. In addition, the flexibility and multi-degree-of-freedom movement capabilities of traditional test equipment are poor, and it is impossible to fully simulate the various loads and movement states that the steering knuckle is subjected to in actual driving. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a commercial vehicle axle steering knuckle resistance force testing equipment based on static pressure technology, which solves the problem of inaccurate testing mentioned in the above background technology.

[0004] To achieve the above purpose, the present invention is implemented by the following technical solutions: a commercial vehicle axle steering knuckle blocking force test equipment based on static pressure technology, including a vertical loading mechanism, a gantry load-bearing frame, a plane guide mechanism, a horizontal loading mechanism, a multi-degree-of-freedom static pressure turntable, and a cast iron test platform, wherein the vertical loading mechanism includes a front ball joint, the commercial vehicle axle is connected to the front ball joint through a screw between the axle connecting tooling and the front ball joint, and is used for vertical loading of the commercial vehicle axle, the vertical loading mechanism is connected to the lower connecting plate arranged on the gantry load-bearing frame, the gantry load-bearing frame is fixedly connected to the cast iron test platform through screws, the front and rear planes of the axle connecting tooling are in contact with two sets of plane guide mechanisms, so that it can move along the guide plane of the plane guide mechanism, the plane guide mechanism is provided with a plurality of groups, and is respectively connected to the cast iron test platform through screws, the commercial vehicle axle includes a steering knuckle, an upper swing arm is installed on the steering knuckle, the upper swing arm is connected to the horizontal loading mechanism through a pin, and the horizontal loading mechanism can horizontally load the axle steering knuckle, so that the steering knuckle can swing around the steering knuckle column pin.

[0005] Preferably, the vertical loading mechanism also includes a first load sensor, a first piston rod, a first front cylinder head, a first cylinder barrel, a first valve plate, a servo valve block, a first accumulator, a first sleeve, a first rear flange, and a first rear ball joint. The front ball joint is connected to the first load sensor and the first piston rod in sequence. The first piston rod is connected to the first cylinder barrel through the first front cylinder head. The first valve plate is arranged on the first cylinder barrel. The first valve plate is connected to the servo valve block and the first accumulator. The first sleeve is installed at the rear end of the first cylinder barrel. The rear end of the first sleeve is connected to the first rear flange and the first rear ball joint in sequence, and is connected to the axle connection tooling through the first rear ball joint.

[0006] Preferably, the gantry bearing frame includes a crossbeam, a column, an upper connecting plate, a lower connecting plate, a connecting stud, a first locking nut and related screws. The crossbeam and the column are fixed by screws, and the upper connecting plate and the lower connecting plate are fixed to the crossbeam by connecting studs and the first locking nut, which are used to connect the vertical loading mechanism. The positions of the two groups of upper connecting plates and lower connecting plates on the crossbeam can be adjusted according to different installation spacings of the style to adapt to different installation spacings. The column is fixed to the cast iron test platform by screws, and the gantry bearing frame and the cast iron test platform form a closed force-bearing frame for bearing the vertical load reaction force of the specimen.

[0007] Preferably, the horizontal loading mechanism comprises a tripod, a mounting plate, a second rear ball joint, a second rear flange, a second sleeve, a second accumulator, a second valve plate, a second cylinder, a second front cylinder head, a second piston rod, a second load sensor, an extension rod, a second locking nut, a pin, an articulated support, etc., and is used to horizontally load the steering knuckle of the commercial vehicle axle to make the steering knuckle produce a swing angle movement. The tripod is fixed to the cast iron test platform by screws, the second rear ball joint is connected to the tripod by screws, and the other side of the horizontal loading mechanism is connected to the articulated support by an extension rod, and is connected to the commercial vehicle axle by a pin. The second rear flange is connected to the second rear ball joint, the second sleeve is arranged on the second rear flange, the second accumulator and the second valve plate are arranged on the second cylinder, the steering knuckle can perform swing angle movement along the upper swing arm, and a second load sensor is installed on the horizontal loading mechanism to test the friction force exerted on the steering knuckle during the swing angle movement. The horizontal loading mechanism adopts static pressure support technology to make the second piston rod, the second cylinder and the second front cylinder head in a liquid suspension state, which belongs to liquid friction, so that the test result of the friction resistance force of the steering knuckle is more realistic and close to the actual stress state.

[0008] Preferably, the multi-degree-of-freedom hydrostatic turntable includes a mounting base plate, which is arranged on a cast iron test platform at the bottom of the gantry load-bearing frame, and a fixed platform, a horizontal limit ring, a mobile platform, and a spherical platform are arranged upward in sequence, and the mobile platform and the spherical platform provide multi-directional degrees of freedom.

[0009] Preferably, the planar guide mechanism includes a planar sliding bearing, a supporting rib plate, a bearing mounting plate, a base plate, and a vertical plate. The planar sliding bearing is mounted on the vertical plate via the bearing mounting plate. The base plate slides on the cast iron test platform. The supporting rib plate is used to connect the vertical plate and the base plate.

[0010] Preferably, the axle connection tooling includes a guide copper pad, a support seat, and a guide fixing screw, and is used to connect a commercial vehicle axle.

[0011] Preferably, the multi-degree-of-freedom hydrostatic turntable is supplied with oil by high-pressure oil, and the high-pressure oil is introduced into the built-in throttling gap through the internal oil circuit. The oil reaches between the spherical platform and the movable platform and between the movable platform and the fixed platform through the built-in throttling gap.

[0012] Preferably, the multi-degree-of-freedom hydrostatic turntable has degrees of freedom, and can rotate around the Z axis and swing around the X and Y axes at a certain angle, which is completed by a spherical platform. At the same time, it can translate along the X and Y planes, which is completed by a mobile platform. The multi-degree-of-freedom hydrostatic turntable is connected to the steering knuckle of the commercial vehicle axle through a steering knuckle connecting tooling.

[0013] Preferably, the horizontal loading mechanism is fixed to the cast iron test platform by screws, the multi-degree-of-freedom hydrostatic turntable and the steering knuckle connecting tooling are fixed by screws, and the multi-degree-of-freedom hydrostatic turntable is connected to the cast iron test platform by screws.

[0014] Working principle: The vertical loading mechanism realizes vertical loading of commercial vehicle axles through components such as the front ball joint, the first load sensor, the first piston rod, the first front cylinder head, the first cylinder barrel, the first valve plate, the servo valve block, the first accumulator, the first sleeve, the first rear flange and the first rear ball joint. The front ball joint provides a flexible connection. The first load sensor measures the vertical load in real time. The first piston rod, the first cylinder barrel and the first front cylinder head constitute a hydraulic cylinder. The first valve plate and the servo valve block accurately control the pressure and flow of the hydraulic system. The first accumulator ensures the stability of the loading process. The first rear flange and the first rear ball joint provide a flexible connection with the axle connection tooling. The plane guide mechanism includes a plane sliding bearing, a support rib plate, a bearing mounting plate, a bottom plate and a vertical plate to ensure the low-friction and precise movement of the axle connection tooling in the X and Y planes, thereby enhancing the stability and accuracy of the test. The horizontal loading mechanism is through a tripod. , mounting plate, second rear ball joint, second rear flange, second sleeve, second accumulator, second valve plate, second cylinder, second front cylinder head, second piston rod, second load sensor, extension rod, second locking nut, pin and articulated support and other components, to achieve horizontal loading of the steering knuckle and simulate the lateral force in actual driving. The second load sensor measures the friction of the steering knuckle in real time during the swing angle motion. The second piston rod and the second cylinder and the second front cylinder head achieve low friction motion through the hydrostatic oil film. The multi-degree-of-freedom hydrostatic turntable provides motion support of various degrees of freedom through the installation of components such as the base plate, fixed platform, horizontal limit ring, mobile platform and spherical platform, including rotation around the Z axis, swinging at a certain angle around the X and Y axes, and translational motion along the X and Y planes. The friction between relatively moving parts is reduced by the high-pressure oil film to ensure the mechanical decoupling and flexible motion of the steering knuckle during the test.

[0015] The present invention provides a commercial vehicle axle steering knuckle blocking force testing equipment based on static pressure technology. It has the following beneficial effects: 1. The present invention adopts the hydrostatic support technology to form a layer of high-pressure oil film between the piston rod and the cylinder barrel and the front cylinder head, thereby suspending the piston rod in the oil, reducing the mechanical friction resistance, and ensuring that the friction force on the steering knuckle during the test is closer to the actual use situation, greatly improving the accuracy and authenticity of the test results. At the same time, the high-precision measurement of the load sensor further ensures the reliability of the load data, making the test data more comprehensive and accurate.

[0016] 2. The present invention has 5 degrees of freedom through the multi-degree-of-freedom hydrostatic turntable, which can realize 360° rotation around the Z axis, swing around the X and Y axes at a certain angle, and translation along the X and Y planes. It can fully simulate various motion states of the steering knuckle in actual driving, including lifting, lowering, left and right swinging, and forward and backward movement. The test equipment can more realistically reflect the performance changes of the steering knuckle under complex road conditions, greatly enhancing the flexibility and adaptability of the test, and is suitable for the test needs of commercial vehicle axle steering knuckles of different types and structures.

[0017] 3. The present invention fixes the gantry bearing frame to the cast iron test platform through screws to form a closed force-bearing frame, which provides rigidity and stability of the overall structure, ensures the stability and reliability of the equipment during vertical and horizontal loading, and effectively avoids test errors caused by insufficient structural rigidity of traditional test equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a side view of the overall structure of the present invention; Figure 3 It is a top view of the overall structure of the present invention; Figure 4 It is a schematic diagram of the gantry bearing frame structure of the present invention; Figure 5 It is a schematic diagram of the structure of the vertical loading mechanism of the present invention; Figure 6 It is a schematic diagram of the structure of the plane guide mechanism of the present invention; Figure 7 It is a schematic diagram of the structure of the multi-degree-of-freedom static pressure turntable of the present invention; Figure 8 This is a schematic diagram of the principle of the multi-degree-of-freedom static pressure turntable of the present invention. Fig. 9 It is a schematic diagram of the axle connection tooling structure of the present invention; Fig.10 It is a schematic diagram of the structure of the horizontal loading mechanism of the present invention; Fig.11 It is a schematic diagram of the commercial vehicle axle structure of the present invention.

[0019] Among them, 1. Gantry bearing frame; 1.1. Column; 1.2. Crossbeam; 1.3. Upper connecting plate; 1.4. Lower connecting plate; 1.5. Connecting stud; 1.6. First locking nut; 2. Vertical loading mechanism; 2.1. Front ball joint; 2.2. First load sensor; 2.3. First piston rod; 2.4. First front cylinder head; 2.5. First cylinder barrel; 2.6. First valve plate; 2.7. Servo valve block; 2.8. First accumulator; 2.9. First sleeve; 2.10. First rear flange; 2.11. First rear ball joint; 3. Plane guide mechanism; 3.1. Plane sliding bearing; 3.2. Support rib plate; 3.3. Bearing mounting plate; 3.4. Bottom plate; 3.5. Vertical plate; 4. Commercial vehicle axle; 4.1. Steering knuckle; 4.2. Upper swing arm; 4.3. Front axle; 4.4. Steering knuckle pin; 4.5. .5, tie rod assembly; 5, multi-freedom hydrostatic turntable; 5.1, spherical platform; 5.2, mobile platform; 5.3, horizontal limit ring; 5.4, fixed platform; 5.5, installation base plate; 6, steering knuckle connection tooling; 7, axle connection tooling; 7.1, guide copper pad; 7.2, support seat; 7.3, guide fixing screw; 8, horizontal loading mechanism; 8.1, tripod; 8.2, mounting plate; 8.3, second rear ball joint; 8.4, second rear flange; 8.5, second sleeve; 8.6, second accumulator; 8.7, second valve plate; 8.8, second cylinder barrel; 8.9, second front cylinder head; 8.10, second piston rod; 8.11, second load sensor; 8.12, extension rod; 8.13, second locking nut; 8.14, pin; 8.15, articulated support; 9, cast iron test platform. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example: Please refer to the attached Figure 1 -Attached Fig.11The embodiment of the present invention provides a commercial vehicle axle steering knuckle blocking force test equipment based on static pressure technology, including a vertical loading mechanism 2, a gantry load-bearing frame 1, a plane guide mechanism 3, a horizontal loading mechanism 8, a multi-degree-of-freedom static pressure turntable 5, and a cast iron test platform 9. The vertical loading mechanism 2 includes a front ball joint 2.1, and the commercial vehicle axle 4 is connected to the front ball joint 2.1 through axle connection tooling 7 by screws, which is used for vertical loading of the commercial vehicle axle 4. The vertical loading mechanism 2 is connected to the lower connecting plate 1.4 set on the gantry load-bearing frame 1, and is fixed by connecting studs 1.5 and first locking nuts 1.6 to ensure the stability of the vertical loading mechanism 2. The gantry bearing frame 1 is fixedly connected to the cast iron test platform 9 by screws to provide rigidity and stability of the overall structure. The planes on the front and rear sides of the axle connection tooling 7 are in contact with two sets of plane guide mechanisms 3 to ensure the precise movement of the axle connection tooling 7 in the plane. The axle connection tooling 7 includes a guide copper pad 7.1, a support seat 7.2, and a guide fixing screw 7.3, which is used to connect the commercial vehicle axle 4. The guide copper pad 7.1 is used to reduce friction. The support seat 7.2 is used to support the axle connection tooling 7. The guide fixing screw 7.3 is used to fix the connection tooling to make it move along the guide plane of the plane guide mechanism 3 to ensure smoothness during the test. The plane guide mechanism 3 is provided with several groups, which are connected to the cast iron test platform 9 by screws respectively to provide multi-directional guide support. The commercial vehicle axle 4 includes a steering knuckle 4.1, and an upper swing arm 4.2 is installed on the steering knuckle 4.1. The upper swing arm 4.2 is connected to the horizontal loading mechanism 8 by pins. The horizontal loading mechanism 8 can horizontally load the axle steering knuckle 4.1 to simulate the lateral force in actual driving, so that the steering knuckle 4.1 can swing around the steering knuckle column pin 4.4 to test the swing angle performance and friction of the steering knuckle. The horizontal loading mechanism 8 is fixed to the cast iron test platform 9 by screws. The multi-degree-of-freedom static pressure turntable 5 is connected to the steering knuckle by a screw. The assembly 6 is fixed by screws. At this time, the multi-freedom hydrostatic turntable 5 plays a role in bearing the vertical load of the steering knuckle 4.1 and performing mechanical decoupling without contact friction when the steering knuckle 4.1 is subjected to swinging motion. The multi-freedom hydrostatic turntable 5 is connected to the cast iron test platform 9 by screws to provide multi-directional freedom support. The commercial vehicle axle 4 includes a steering knuckle 4.1, an upper swing arm 4.2, a front axle 4.3, a steering knuckle pin 4.4, and a tie rod assembly 4.5. The test of the friction resistance of the steering knuckle 4.1 of the commercial vehicle axle 4 needs to be tested when the commercial vehicle axle 4 is subjected to vertical loading to ensure that the friction resistance of the steering knuckle 4.1 is measured when the real force of the simulated axle is subjected to vertical loading. Vertical loading is performed through the vertical loading mechanism 2. At the same time, the steering knuckle 4.1 on the commercial vehicle axle 4 will perform swing angle motion through the horizontal loading mechanism 8.

[0022] The vertical loading mechanism 2 also includes a front ball joint 2.1, a first load sensor 2.2, a first piston rod 2.3, a first front cylinder cover 2.4, a first cylinder barrel 2.5, a first valve plate 2.6, a servo valve block 2.7, a first accumulator 2.8, a first sleeve 2.9, a first rear flange 2.10, and a first rear ball joint 2.11. The front ball joint 2.1 is connected in sequence with the first load sensor 2.2 and the first piston rod 2.3. The front ball joint 2.1 provides a flexible connection. The first load sensor 2.2 is used to measure the vertical load. The first piston rod 2.3 is connected to the first cylinder barrel 2.5 through the first front cylinder cover 2.4. The first valve plate 2.6 is arranged on the first cylinder barrel 2.5. The first piston rod 2.3 and the first cylinder barrel 2.5 constitute a hydraulic cylinder to realize vertical loading. The first valve plate 2.6 is connected to the servo valve block 2.7 and the first accumulator 2.8. The servo valve block 2.7 is used to control the hydraulic system The first accumulator 2.8 is used to store and release hydraulic energy to ensure the smoothness of the loading process. The first sleeve 2.9 is installed at the rear end of the first cylinder 2.5. The rear end of the first sleeve 2.9 is connected with the first rear flange 2.10 and the first rear ball joint 2.11 in sequence, and is connected to the axle connection tooling 7 through the first rear ball joint 2.11. The first rear flange 2.10 and the first rear ball joint 2.11 provide a flexible connection between the vertical loading mechanism 2 and the axle connection tooling 7, which can load a variety of commercial axle specimens and complete the simulation of fatigue tests; the vertical loading mechanism 2 adopts static pressure support technology, so that the piston rod in the actuator has no contact friction when moving, so that the actuator has the characteristics of high speed, high frequency response, long life and high control accuracy, and adopts the front and rear articulated method, so that there will be no mechanical interference during installation, so that the final test curve is more realistic, and tensile and compressive loads can be achieved.

[0023] The gantry bearing frame 1 includes a crossbeam 1.2, a column 1.1, an upper connecting plate 1.3, a lower connecting plate 1.4, a connecting stud 1.5, a first locking nut 1.6 and related screws. The crossbeam 1.2 and the column 1.1 are fixed by screws. The upper connecting plate 1.3 and the lower connecting plate 1.4 are fixed to the crossbeam 1.2 by connecting studs 1.5 and the first locking nut 1.6, and are used to connect the vertical loading mechanism 2. The positions of the two groups of upper connecting plates 1.3 and lower connecting plates 1.4 on the crossbeam 1.2 can be adjusted according to different installation spacings of the style to adapt to different installation spacings. The column 1.1 is fixed to the cast iron test platform 9 by screws. The gantry bearing frame 1 and the cast iron test platform 9 form a closed force-bearing frame for bearing the vertical load reaction force of the specimen.

[0024] The horizontal loading mechanism 8 comprises a tripod 8.1, a mounting plate 8.2, a second rear ball joint 8.3, a second rear flange 8.4, a second sleeve 8.5, a second accumulator 8.6, a second valve plate 8.7, a second cylinder 8.8, a second front cylinder head 8.9, a second piston rod 8.10, a second load sensor 8.11, an extension rod 8.12, a second locking nut 8.13, a pin 8.14, an articulated support 8.15, etc., and is used to horizontally load the steering knuckle 4.1 of the commercial vehicle axle 4 so that the steering knuckle 4.1 produces a swing angle motion. The tripod 8.1 is fixed to the cast iron test platform 9 by screws, the second rear ball joint 8.3 is connected to the tripod 8.1 by screws, and the other side of the horizontal loading mechanism 8 is connected to the articulated support 8.15 by the extension rod 8.12, and is connected to the steering knuckle 4.1 of the commercial vehicle axle 4 by the pin 8.14. The upper swing arm 4.2 is connected, the second rear flange 8.4 is connected to the second rear ball joint 8.3, the second sleeve 8.5 is arranged on the second rear flange 8.4, the second accumulator 8.6 and the second valve plate 8.7 are both arranged on the second cylinder 8.8, the second accumulator 8.6 is used to store and release hydraulic energy, the second valve plate 8.7 is used to control the flow and pressure of hydraulic oil, the steering knuckle 4.1 can perform swing angle movement along the upper swing arm 4.2, and the second load sensor 8.11 is installed on the horizontal loading mechanism 8 to test the friction force exerted on the steering knuckle 4.1 during the swing angle movement. The horizontal loading mechanism 8 adopts the static pressure support technology, so that the second piston rod 8.10 and the second cylinder 8.8 and the second front cylinder cover 8.9 are in a liquid suspension state, which belongs to liquid friction, so that the test result of the friction resistance force of the steering knuckle 4.1 is more realistic and close to the actual stress state.

[0025] The multi-freedom static pressure turntable 5 includes a mounting base plate 5.5, which is arranged on the cast iron test platform 9 at the bottom of the gantry bearing frame 1. A fixed platform 5.4, a horizontal limit ring 5.3, a mobile platform 5.2, and a spherical platform 5.1 are arranged upward in sequence. The mobile platform 5.2 and the spherical platform 5.1 provide multi-directional degrees of freedom. The multi-freedom static pressure turntable 5 is supplied with oil by high-pressure oil. The high-pressure oil is introduced into the built-in throttling gap through the internal oil circuit. The oil reaches between the spherical platform 5.1 and the mobile platform 5.2 and between the mobile platform 5.2 and the fixed platform 5.4 through the built-in throttling gap, so that the gaps between the two are filled with static pressure oil film to provide bearing capacity. Due to the spherical platform 5.1 and the mobile platform 5.2 and the mobile platform 5.2 and the fixed platform 5.4, the static pressure oil film is formed between the spherical platform 5.1 and the mobile platform 5.2 and the mobile platform 5.2 and the fixed platform 5.4. .4 There is an oil film in the gap between them, so there is a liquid oil film between the relatively moving parts, which is in a pure liquid friction state and has extremely low friction resistance. The multi-freedom hydrostatic turntable 5 has 5 degrees of freedom and can rotate 360° around the Z axis and swing around the X and Y axes at a certain angle, which is completed by the spherical platform 5.1. At the same time, it can translate along the X and Y planes, which is completed by the mobile platform 5.2. The multi-freedom hydrostatic turntable 5 is connected to the steering knuckle 4.1 of the commercial vehicle axle 4 through the steering knuckle connecting fixture 6. The multi-freedom hydrostatic turntable 5 is supplied with high-pressure oil. Through the internal oil circuit, the high-pressure oil is introduced into the built-in throttling gap. The oil reaches between the spherical platform 5.1 and the mobile platform 5.2 and between the mobile platform 5.2 and the fixed platform 5.4 through the built-in throttling gap.

[0026] The plane guide mechanism 3 includes a plane sliding bearing 3.1, a supporting rib plate 3.2, a bearing mounting plate 3.3, a base plate 3.4, and a vertical plate 3.5. The plane sliding bearing 3.1 is mounted on the vertical plate 3.5 through the bearing mounting plate 3.3 to ensure a low-friction guiding function. The base plate 3.4 slides on the cast iron test platform 9. The supporting rib plate 3.2 is used to connect the vertical plate 3.5 and the base plate 3.4 to enhance the structural rigidity and stability of the guide mechanism.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A commercial vehicle axle steering knuckle blocking force test equipment based on static pressure technology, characterized in that: The invention comprises a vertical loading mechanism (2), a gantry bearing frame (1), a plane guiding mechanism (3), a horizontal loading mechanism (8), a multi-degree-of-freedom static pressure turntable (5), and a cast iron test platform (9), wherein the vertical loading mechanism (2) comprises a front ball joint (2.1), the commercial vehicle axle (4) is connected to the front ball joint (2.1) via axle connecting fixture (7) via screws, and is used for vertical loading of the commercial vehicle axle (4), the vertical loading mechanism (2) is connected to a lower connecting plate (1.4) arranged on the gantry bearing frame (1), the gantry bearing frame (1) is fixedly connected to the cast iron test platform (9) via screws, and the vertical loading mechanism (2) is connected to the lower connecting plate (1.4) arranged on the gantry bearing frame (1), and the gantry bearing frame (1) is fixedly connected to the cast iron test platform (9) via screws. The planes on the front and rear sides of the axle connection tooling (7) are in contact with two sets of plane guide mechanisms (3), so that the axle connection tooling (7) moves along the guide planes of the plane guide mechanisms (3). The plane guide mechanisms (3) are provided with a plurality of groups, which are respectively connected to the cast iron test platform (9) by screws. The commercial vehicle axle (4) includes a steering knuckle (4.1). An upper swing arm (4.2) is installed on the steering knuckle (4.1). The upper swing arm (4.2) is connected to a horizontal loading mechanism (8) by a pin. The horizontal loading mechanism (8) can horizontally load the axle steering knuckle (4.1), so that the steering knuckle (4.1) can perform a swing angle movement around a steering knuckle column pin (4.4).

2. The commercial vehicle axle steering knuckle resistance test equipment based on static pressure technology according to claim 1 is characterized in that: The vertical loading mechanism (2) further comprises a first load sensor (2.2), a first piston rod (2.3), a first front cylinder cover (2.4), a first cylinder barrel (2.5), a first valve plate (2.6), a servo valve block (2.7), a first accumulator (2.8), a first sleeve (2.9), a first rear flange (2.10), and a first rear ball joint (2.11); the front ball joint (2.1) is connected to the first load sensor (2.2) and the first piston rod (2.3) in sequence; the first piston rod (2.3) is connected to the first rear ball joint (2.11) through the first A front cylinder head (2.4) is connected to the first cylinder barrel (2.5); the first valve plate (2.6) is arranged on the first cylinder barrel (2.5); the first valve plate (2.6) is connected to the servo valve block (2.7) and the first accumulator (2.8); the first sleeve (2.9) is installed at the rear end of the first cylinder barrel (2.5); the rear end of the first sleeve (2.9) is connected in sequence to the first rear flange (2.10) and the first rear ball joint (2.11), and is connected to the axle connection tooling (7) via the first rear ball joint (2.11).

3. The commercial vehicle axle steering knuckle blocking force testing equipment based on static pressure technology according to claim 1 is characterized in that: The gantry bearing frame (1) comprises a crossbeam (1.2), a column (1.1), an upper connecting plate (1.3), a lower connecting plate (1.4), a connecting stud (1.5), a first locking nut (1.6) and related screws. The crossbeam (1.2) and the column (1.1) are fixed by screws. The upper connecting plate (1.3) and the lower connecting plate (1.4) are fixed to the crossbeam (1.2) by connecting studs (1.5) and the first locking nut (1.6) and are used to connect the vertical loading mechanism (2). The positions of the two groups of upper connecting plates (1.3) and lower connecting plates (1.4) on the crossbeam (1.2) can be adjusted according to different installation spacings of the style to adapt to different installation spacings. The column (1.1) is fixed to the cast iron test platform (9) by screws. The gantry bearing frame (1) and the cast iron test platform (9) form a closed load-bearing frame for bearing the vertical load reaction force of the specimen.

4. The commercial vehicle axle steering knuckle blocking force testing equipment based on static pressure technology according to claim 1 is characterized in that: The horizontal loading mechanism (8) comprises a tripod (8.1), a mounting plate (8.2), a second rear ball joint (8.3), a second rear flange (8.4), a second sleeve (8.5), a second accumulator (8.6), a second valve plate (8.7), a second cylinder (8.8), a second front cylinder head (8.9), a second piston rod (8.10), a second load sensor (8.11), an extension rod (8.12), a second locking nut (8.13), a pin (8.14), an articulated support (8.15), etc., and is used to horizontally load a steering knuckle (4.1) of a commercial vehicle axle (4) so ​​that the steering knuckle (4.1) generates a swing angle movement. The tripod (8.1) is fixed to a cast iron test platform (9) by screws, the second rear ball joint (8.3) is connected to the tripod (8.1) by screws, and the other side of the horizontal loading mechanism (8) is connected to the articulated support (8.15) by an extension rod (8.12). The second rear flange (8.4) is connected to the second rear ball joint (8.3); the second sleeve (8.5) is arranged on the second rear flange (8.4); the second accumulator (8.6) and the second valve plate (8.7) are arranged on the second cylinder (8.8); the steering knuckle (4.1) can perform angular movement along the upper swing arm (4.2); a second load sensor (8.11) is installed on the horizontal loading mechanism (8) for testing the friction force exerted on the steering knuckle (4.1) during the angular movement; the horizontal loading mechanism (8) adopts a static pressure support technology, so that the second piston rod (8.10) and the second cylinder (8.8) and the second front cylinder cover (8.9) are in a liquid suspension state, which belongs to liquid friction, so that the test result of the friction resistance force of the steering knuckle (4.1) is more realistic and close to the actual stress state.

5. The commercial vehicle axle steering knuckle blocking force testing equipment based on static pressure technology according to claim 1, characterized in that: The multi-degree-of-freedom static pressure turntable (5) comprises a mounting base plate (5.5), wherein the mounting base plate (5.5) is arranged on a cast iron test platform (9) at the bottom of a gantry bearing frame (1), and a fixed platform (5.4), a horizontal limit ring (5.3), a mobile platform (5.2), and a spherical platform (5.1) are arranged in sequence upwards, wherein the mobile platform (5.2) and the spherical platform (5.1) provide multi-directional degrees of freedom.

6. The commercial vehicle axle steering knuckle blocking force testing equipment based on static pressure technology according to claim 1 is characterized in that: The planar guide mechanism (3) comprises a planar sliding bearing (3.1), a supporting rib plate (3.2), a bearing mounting plate (3.3), a bottom plate (3.4), and a vertical plate (3.5); the planar sliding bearing (3.1) is mounted on the vertical plate (3.5) via the bearing mounting plate (3.3); the bottom plate (3.4) slides on the cast iron test platform (9); and the supporting rib plate (3.2) is used to connect the vertical plate (3.5) and the bottom plate (3.4).

7. The commercial vehicle axle steering knuckle resistance test equipment based on static pressure technology according to claim 1 is characterized in that: The vehicle axle connection tool (7) comprises a guide copper pad (7.1), a support seat (7.2), and a guide fixing screw (7.3), and is used for connecting a commercial vehicle axle (4).

8. The commercial vehicle axle steering knuckle blocking force testing equipment based on static pressure technology according to claim 1 is characterized in that: The multi-degree-of-freedom hydrostatic turntable (5) is supplied with high-pressure oil, and the high-pressure oil is introduced into the built-in throttling gap through the internal oil path. The oil reaches between the spherical platform (5.1) and the movable platform (5.2) and between the movable platform (5.2) and the fixed platform (5.4) through the built-in throttling gap.

9. The commercial vehicle axle steering knuckle blocking force testing equipment based on static pressure technology according to claim 1, characterized in that: The multi-freedom hydrostatic turntable (5) has five degrees of freedom and can rotate 360 ​​degrees around the Z axis and swing around the X and Y axes at a certain angle, which is accomplished by the spherical platform (5.1). At the same time, it can translate along the X and Y planes, which is accomplished by the mobile platform (5.2). The multi-freedom hydrostatic turntable (5) is connected to the steering knuckle (4.1) of the commercial vehicle axle (4) via a steering knuckle connecting fixture (6).

10. The commercial vehicle axle steering knuckle blocking force testing equipment based on static pressure technology according to claim 1, characterized in that: The horizontal loading mechanism (8) is fixed to the cast iron test platform (9) by means of screws, the multi-degree-of-freedom static pressure turntable (5) and the steering knuckle connection tooling (6) are fixed by means of screws, and the multi-degree-of-freedom static pressure turntable (5) is connected to the cast iron test platform (9) by means of screws.

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