A large ball hinge joint bearing load swing torque detection device and a use method

Abstract

The application discloses a large spherical hinge joint bearing load swing torque detection device and a use method. The detection device comprises a measuring frame, a fixing assembly, a mandrel assembly, a load assembly and a rocker lever. The fixing assembly can be selectively detachably installed on the measuring frame in a front face or a reverse face, and the ball center of the inner ring of the large spherical hinge joint bearing is located at the front center of the fixing assembly. The connecting point of the load assembly and the mandrel assembly is always located at the ball center position of the inner ring of the large spherical hinge joint bearing. The load assembly applies different loads to the mandrel assembly. The rocker lever is connected with the mandrel assembly and drives the inner ring of the large spherical hinge joint bearing to swing by driving the mandrel to swing. The large spherical hinge joint bearing load swing torque detection device does not cause the change of the load due to the swing of the inner ring of the bearing during the bearing detection, and thus the measurement accuracy is high. After the bearing is installed, the reverse face detection can be performed without disassembling the bearing, and the use is convenient.

Description

Technical Field

[0001] This invention relates to the field of bearing testing equipment, specifically to a device for detecting the oscillating torque of a large ball joint bearing under load and its usage method. Background Technology

[0002] With the development of aerospace technology, people have higher and higher requirements for the performance of aircraft components. Large ball joint bearings for aerospace automatic swashplates are a key component of aircraft components.

[0003] A schematic diagram of a large ball joint bearing is shown below. Figure 1 As shown, the large ball joint bearing consists of an inner ring, two half outer rings, and a spacer. The parts of the large ball joint bearing are thin-walled and easily deformed. They are easily subjected to external forces, which can cause slight deformation of the product. In addition, the dimensions are larger than those of conventional ball joint bearings. Improper installation or fixing on the testing device can significantly affect the magnitude of the measured value of the load swing torque.

[0004] Currently, there are no readily available measuring instruments, equipment, or successful experiences to draw upon for detecting the load-bearing oscillation torque of large ball joint bearings, either domestically or internationally. The lack of detection technology for load-bearing oscillation torque of large ball joint bearings in this field fails to meet the needs of new product development, production, and customers. Therefore, it is necessary to develop a custom-made detection device for load-bearing oscillation torque of large ball joint bearings to meet these requirements. The following challenges need to be considered before designing such a device:

[0005] 1) Large ball joint bearings have a complex structure: The outer ring of the bearing consists of two half outer rings and a spacer. All of them are made of aluminum alloy and are large in size. They are thin-walled parts that are easy to deform. The dimensional accuracy, roughness and form and position tolerance of the detection device will affect the deformation of the outer ring, and thus affect the detection value.

[0006] 2) The mounting surface of the large ball joint bearing on the testing device is uncontrollable, and front and back measurements are required: The large ball joint bearing is randomly mounted on the testing device with the front or back side. In order to facilitate operation, the testing device needs to be designed to ensure that the center of the inner ring is in the exact center of the testing device regardless of whether the large ball joint bearing is placed with the front or back side. The testing device is also required to be easy to disassemble from the large ball joint bearing.

[0007] 3) Load requirements: A force-amplifying device needs to be designed to ensure that the load on the force-amplifying device does not change during the measurement process and does not affect the measured value;

[0008] 4) Measurement station position requirements: This large ball joint bearing needs to be measured at least 8 positions, and the measurement positions are random. The measurement position needs to be able to be quickly rotated to the required measurement position. Summary of the Invention

[0009] To address the above problems, this invention provides a device for detecting the oscillating torque of a large ball joint bearing under load, comprising:

[0010] Measuring frame, used to support and fix components;

[0011] A fixing assembly is used to clamp the double outer ring of a large ball joint bearing. The clamping force on the double outer ring of the large ball joint bearing is along the axial direction of the double outer ring. The fixing assembly can be selectively and detachably installed on the measuring frame from both sides, and the center of the inner ring of the large ball joint bearing is located at the center of the fixing assembly.

[0012] The mandrel assembly includes a mandrel detachably inserted in the inner ring of a large ball joint bearing, the mandrel having a shoulder abutting against an end face of the inner ring of the large ball joint bearing, and the mandrel assembly being detachably connected to the large ball joint bearing.

[0013] The load assembly is detachably and movably connected to the spindle assembly. The connection point between the load assembly and the spindle assembly is located at the center of the inner ring of the large ball joint bearing. The load assembly applies different loads to the spindle assembly, causing the shoulder to antagonize the end face of the inner ring of the large ball joint bearing.

[0014] The rocker arm connects to the spindle assembly and drives the spindle to swing, thereby causing the inner ring of the large ball joint bearing to swing.

[0015] Furthermore, the clamping force of the fixing assembly on each half of the outer ring of the large ball joint bearing is applied between the inner spherical surface and the outer circumferential surface of the half of the outer ring.

[0016] Furthermore, the fixing assembly includes a fixing seat and a cover plate. The fixing seat is detachably mounted on the measuring frame, and the cover plate is detachably mounted above the fixing seat. A first convex ring is provided on the inner circumferential surface of the central hole of the fixing seat, and a second convex ring is provided on the inner circumferential surface of the central hole of the cover plate, which is spaced apart from the first convex ring. An annular clamping cavity for clamping the double outer ring is formed between the first convex ring and the second convex ring. The first convex ring and the second convex ring cooperate to clamp the double outer ring of the large ball joint bearing.

[0017] Furthermore, the fixed base is provided with protruding mounting parts around its perimeter, the measuring frame has a horizontal support plate, the mounting parts can be placed on the support plate from both the front and back directions, the mounting parts and the support plate are provided with a plurality of corresponding bolt mounting holes, and the mounting parts and the support plate are connected by bolts.

[0018] Furthermore, the mounting base, cover plate, and spindle are made of aluminum alloy.

[0019] Furthermore, the load assembly includes a hook rod, a lever, an angled wedge, and a drive component. The lever has a fulcrum in the middle, one end of the lever is connected to the angled wedge, and the other end of the lever is connected to the hook rod. The hook rod is detachably connected to the spindle assembly. The angled wedge is connected to the drive component. The drive component causes the lever to swing by moving the angled wedge, thereby applying a load to the spindle assembly through the hook rod.

[0020] Furthermore, the angled wedge is stepped, with multiple platform steps, and adjacent platform steps are connected by inclined surfaces.

[0021] Furthermore, the driving component includes a cylinder and a piston rod, the piston rod being connected to an angled wedge, and the cylinder pushing the angled wedge through the piston rod to raise or lower one end of the lever.

[0022] Furthermore, the mandrel assembly also includes a connecting plate and a lifting ring. The mandrel has a groove, the connecting plate is fixed in the groove, and the lifting ring is installed in the middle of the connecting plate. One end of the hook rod is hooked onto the lifting ring, and the hook connection point between the hook rod and the lifting ring is located at the center of the inner ring of the large ball joint bearing.

[0023] Furthermore, the rocker arm and the spindle are detachably connected.

[0024] This invention also provides a method for using a load-bearing oscillation torque detection device for large ball joint bearings. The device includes a measuring frame, a fixing assembly, a spindle assembly, a load assembly, and a rocker arm. The fixing assembly includes a fixing seat and a cover plate. The fixing seat is detachably mounted on the measuring frame, and the cover plate is detachably mounted above the fixing seat. A first convex ring is provided on the inner circumferential surface of the central hole of the fixing seat, and a second convex ring is provided on the inner circumferential surface of the central hole of the cover plate, spaced apart from the first convex ring. An annular clamping cavity for clamping the double outer rings is formed between the first and second convex rings. The first and second convex rings cooperate to clamp the double outer rings of the large ball joint bearing. The load assembly includes a hook rod, a lever, an angled wedge, and a driving component. A fulcrum is provided in the middle of the lever, and one end of the lever is connected to the angled wedge. The other end is connected to a hook rod, which is detachably connected to the spindle assembly. An angled wedge is connected to a drive unit, which moves the angled wedge to cause the lever to swing, thereby applying a load to the spindle assembly via the hook rod. The spindle assembly includes a spindle detachably inserted into the inner ring of a large ball joint bearing, a connecting plate, and a lifting ring. The spindle has a shoulder that abuts against one end face of the inner ring of the large ball joint bearing. The spindle has a groove, and the connecting plate is fixed in the groove. The lifting ring is installed in the middle of the connecting plate. One end of the hook rod is hooked onto the lifting ring, and the hook connection point between the hook rod and the lifting ring is located at the center of the inner ring of the large ball joint bearing. The spindle assembly is detachably connected to the large ball joint bearing. The rocker arm connecting the spindle drives the spindle to swing, thereby driving the inner ring of the large ball joint bearing to swing. This method of use includes the following steps:

[0025] Step 1: The mounting base is installed on the measuring frame, and the mounting base and the measuring frame are connected by screws.

[0026] Step 2: Place the outer half ring, inner ring, spacer, and outer half ring of the large ball joint bearing on the fixed seat in sequence. Place the cover plate on the end face of the two outer half rings and tighten the screws connecting the cover plate and the fixed seat to ensure that each outer half ring of the large ball joint bearing is subjected to uniform force.

[0027] Step 3: Connect the rocker arm to the spindle, connect the lifting ring to the spindle, and then install the spindle into the inner ring of the large ball joint bearing to ensure that the rocker arm swings back and forth, causing the inner ring of the large ball joint bearing to swing back and forth within the self-aligning angle range.

[0028] Step 4: Connect the hook rod to the lifting ring. When the inner ring of the large ball joint bearing swings within the self-aligning angle range, the connection point between the lifting ring and the hook rod is always at the center of the inner ring of the large ball joint bearing, and the load remains unchanged.

[0029] Step 5: The cylinder drives the angled wedge block to lift one end of the lever through the piston rod, and applies the load to the large ball joint bearing through the hook rod;

[0030] Step 6: Connect a rotating mechanism to the rocker arm. Install a force gauge on the rotating mechanism that drives the rocker arm to measure the load swing torque. Multiply the measured force by the distance of the rocker arm to obtain the load swing torque value of the large ball joint bearing at that position.

[0031] The large ball joint bearing under load swing torque detection device provided by the present invention has the following advantages:

[0032] 1) The fixed assembly can be selectively and detachably installed on the measuring frame from both sides. The center of the inner ring of the large ball joint bearing is located at the center of the fixed assembly. After the bearing is installed on the fixed assembly for front-side inspection, there is no need to remove the bearing. The bearing can be inspected from the reverse side by installing the fixed assembly on the measuring frame from the other side.

[0033] 2) The connection point between the load assembly and the spindle assembly is always located at the center of the inner ring of the large ball joint bearing. When the rocker arm swings back and forth, causing the inner ring of the bearing to swing back and forth within the self-aligning angle range, the load will not change due to the swing of the inner ring. The load does not change during the measurement process and does not affect the measurement value. Therefore, the measurement value is highly accurate.

[0034] 3) The bearing is fixed by fixing the two halves of the outer ring and axially clamping the end faces of the two halves of the outer ring. The clamping force (end face contact area) is applied between the inner spherical surface and the outer circumferential surface of the outer ring, which can minimize the measurement error caused by the clamping force.

[0035] 4) The load assembly used adopts a lever plus angled wedge structure. The angled wedge can provide a constant load during testing, ensuring that the load is stable at a certain value, and the load adjustment operation is simple.

[0036] 5) The parts in contact with the bearing are made of the same aluminum alloy as the bearing to reduce the impact of temperature changes and wear on the parts during the swing test. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the structure of the large ball joint bearing of the present invention;

[0038] Figure 2 This is a schematic diagram of the structure of the load swing torque detection device for the large ball joint bearing of the present invention;

[0039] Figure 3 This is a schematic diagram of the angled wedge block of the present invention;

[0040] Figure 4 It is an assembly drawing of a large ball joint bearing and its fixing components. Detailed Implementation

[0041] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0042] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. The term "connection" can be understood as a direct connection or an indirect connection, such as welding, bolting, snap-fitting, or lap joint, unless it conflicts with the meaning of the text. Therefore, it should not be construed as a limitation of this invention.

[0043] This invention, based on the traditional principle of oscillating torque measurement and relevant standards, designs a load-bearing oscillating torque measuring device for large ball joint bearings according to the requirements of the mounting and operating mechanisms. Since the outer ring of the large ball joint bearing consists of two half-outer rings 4 and a spacer, fixing the two half-outer rings 4 and their end faces allows the outer rings to be fitted into a single unit. This completes the fitting of the large ball joint bearing into a single outer ring and inner ring 5, thus enabling convenient measurement of the oscillating torque value of the large ball joint bearing.

[0044] like Figure 2 As shown, this embodiment discloses a load-bearing oscillation torque detection device for a large ball joint bearing (hereinafter referred to as the bearing), including a measuring frame 1, a fixing assembly, a mandrel assembly, a load assembly, and a rocker arm 7. The measuring frame 1 is used to support the fixing assembly, which is used to clamp the double outer ring 4 of the large ball joint bearing (double outer ring refers to two half outer rings). The clamping force on the double outer ring 4 of the large ball joint bearing is along the axial direction of the double outer ring 4. The fixing assembly can be selectively and detachably installed on the measuring frame 1 from both sides, and the center of the inner ring of the large ball joint bearing is located at the center of the fixing assembly. The mandrel assembly includes a mandrel 6 detachably inserted into the inner ring 5 of the large ball joint bearing. The mandrel 6 has a shoulder 61, which abuts against the large ball joint bearing. One end face of the inner ring 5 of the ball joint bearing is detachably connected to the spindle assembly; the load assembly is detachably connected to the spindle assembly. Regardless of whether the spindle 6 is installed in the bearing inner ring 5 in the forward or reverse direction, the connection point between the load assembly and the spindle assembly is always located at the center of the ball of the inner ring 5 of the ball joint bearing. The load assembly applies different loads to the spindle assembly, causing the shoulder 61 to resist the end face of the inner ring 5 of the ball joint bearing; the rocker arm 7 connects to the spindle assembly and drives the spindle 6 to swing, thereby driving the inner ring 5 of the ball joint bearing to swing.

[0045] The double outer rings 4 are fitted as a whole on the detection device. A rotating mechanism (a conventional technique in this field) is connected to the rocker arm 7. The force gauge is mounted on the rotating mechanism connected to the rocker arm 7 to measure the loaded swing torque. The measured force multiplied by the distance of the rocker arm 7 is the value of the loaded swing torque at the detection position. To facilitate measurement at multiple positions, the rocker arm 7 is connected to a rotating mechanism, allowing the measurement point to be randomly and quickly rotated to the position to be measured. Since the connection point between the load assembly and the spindle assembly is always located at the center of the inner ring 5 of the large ball joint bearing, when the rocker arm 7 swings back and forth, causing the inner ring 5 of the bearing to swing back and forth within the self-aligning angle range, the load will not change due to the swing of the inner ring 5. The load does not change during the measurement process and does not affect the measured value, thus the measurement accuracy is high. The connection between the spindle assembly and the inner ring 5 of the bearing is only by inserting the spindle 6 into the inner ring 5 of the bearing, so the disassembly of the spindle assembly and the bearing is convenient. The load assembly and the spindle assembly are detachably connected. After the front side measurement of the bearing is completed, the spindle assembly and the load assembly are separated. Then, the fixed assembly is installed on the measuring frame 1 with the reverse side facing up. The spindle 6 is inserted into the inner ring 5 of the bearing from the reverse side and connected to the load assembly, thereby performing a reverse side measurement of the bearing.

[0046] To minimize the minor impact of the form and position errors of the testing device on the entire large ball joint bearing after installation, the machining accuracy of the entire device needs to be improved during its design and fabrication. To further reduce the influence of bearing form and position tolerances on the measured values, while ensuring installation stability, the contact area between the testing device and the bearing is intentionally reduced to minimize the impact of outer ring deformation on the measured values. For example... Figure 4 The clamping force of the fixing assembly on each half of the outer ring 4 of the large ball joint bearing is applied between the inner spherical surface and the outer circumferential surface of the half of the outer ring 4. The fixing assembly includes a fixing seat 2 and a cover plate 3. The fixing seat 2 is mounted on the measuring frame 1, and the cover plate 3 is detachably mounted above the fixing seat 2. A first convex ring 15 is provided on the inner circumferential surface of the central hole of the fixing seat 2, and a second convex ring 16 is provided on the inner circumferential surface of the central hole of the cover plate 3, which is spaced apart from the first convex ring 15. An annular clamping cavity for clamping the double half of the outer ring 4 is formed between the first convex ring 15 and the second convex ring 16. The first convex ring 15 and the second convex ring 16 cooperate to apply a clamping force between the inner spherical surface and the outer circumferential surface of the double half of the outer ring 4. By fixing the double half of the outer ring 4 of the bearing with the inner hole of the fixing seat 2 and axially clamping the end face of the double half of the outer ring 4, and by applying the clamping force (end face contact area) between the inner spherical surface and the outer circumferential surface of the outer ring, the measurement error caused by the clamping force is minimized.

[0047] The fixed base 2 has protruding mounting parts 18 around its perimeter, and the measuring frame 1 has a horizontal support plate 17. The mounting parts 18 can be placed on the support plate 17 from both the front and back directions. The mounting parts 18 and the support plate 17 have a number of corresponding bolt mounting holes 19, and the mounting parts 18 and the support plate 17 are connected by bolts.

[0048] The outer ring of the bearing consists of two half-outer rings 4 and a spacer. All of them are made of aluminum alloy and are relatively large, thin-walled parts that are prone to deformation. The dimensional accuracy, roughness, and form and position tolerance of the testing device will affect the deformation of the outer ring and thus affect the test value. Considering that the ambient temperature has a significant impact on the bearing size, in order to reduce the impact of the testing device, the parts of the testing device that come into contact with the bearing are all made of aluminum alloy and the machining accuracy is strictly controlled. The fixed seat 2, cover plate 3, and spindle 6 all come into contact with the bearing, so at least the fixed seat 2, cover plate 3, and spindle 6 are made of aluminum alloy.

[0049] The load assembly includes a hook rod 10, a lever 11, an angled wedge 12, and a drive component. The lever 11 has a fulcrum in the middle, one end of which is connected to the angled wedge 12, and the other end is connected to the hook rod 10. The hook rod 10 is detachably connected to the spindle assembly. The angled wedge 12 is connected to the drive component. The drive component moves the angled wedge 12, causing the lever 11 to swing, thereby applying a load to the spindle assembly via the hook rod 10. Using the hook rod 10 to connect to the spindle assembly facilitates disassembly. Connecting the hook rod 10 to the load assembly eliminates the need for manual weight addition. Considering the swinging of the inner ring 5 of the bearing, the connection between the hook rod 10 and the spindle assembly must be smooth. In one embodiment, as shown in the figure, the load assembly is located below the spindle 6. The hook rod 10 is connected to the left side of the lever 11 of the load assembly. The cylinder 14 moves via the piston rod 13, thereby driving the angled wedge 12 and lifting the right side of the lever 11, thus applying a load to the spindle 6.

[0050] In a better way, such as Figure 3 The angled wedge 12 is stepped, with multiple platform steps 121, and adjacent platform steps 121 are connected by inclined surfaces 122. The angled wedge 12 is designed with multiple inclined surfaces 122 and multiple platform steps 121. The inclined surfaces 122 can apply multiple loads as required, and the platform steps 121 can ensure that the applied load values ​​are stable.

[0051] The driving component includes a cylinder 14 and a piston rod 13. The piston rod 13 is connected to an angled wedge 12. The cylinder 14 pushes the angled wedge 12 through the piston rod 13, thereby raising or lowering one end of the lever 11. Of course, in other embodiments, the driving component can also be other types, such as hydraulic cylinders or electric cylinders.

[0052] Considering that the large ball joint bearing is installed axially and randomly in both directions during testing, it is best to perform measurements from both sides when the large ball joint bearing is placed axially without disassembly. The mandrel assembly also includes a connecting plate 8 and a lifting ring 9. The mandrel 6 has a groove 62, the connecting plate 8 is fixed in the cavity, and the lifting ring 9 is installed in the middle of the connecting plate 8. One end of the hook rod 10 is hooked onto the lifting ring 9. After the mandrel 6 is installed on the inner ring 5 of the large ball joint bearing, the hook connection point between the hook rod 10 and the lifting ring 9 is located at the center of the inner ring 5 of the bearing. After the front test, the large ball joint bearing does not need to be disassembled. The fixed assembly can be installed on the measuring frame with the back side to perform the reverse measurement. When the rocker arm swings back and forth, causing the inner ring of the bearing to swing back and forth within the self-aligning angle range, the load will not change due to the swing of the inner ring.

[0053] In the specific structure, the mandrel 6 is preferably an axisymmetric structure, with the center of the inner ring 5 of the bearing and the center line of the mandrel 6 located on the same straight line. As shown in the figure, the mandrel 6 has an insertion part installed in the inner ring 5 of the bearing. The insertion part has a downward-facing groove 62, in which the connecting plate 8 and the lifting ring 9 are accommodated. The shoulder 61 extends radially from the outer periphery of the upper end face of the mandrel 6. A protruding connecting part is provided in the middle of the upper end face of the mandrel 6 for connecting the rocker arm 7. The rocker arm 7 is detachably connected to the mandrel 6. The connecting plate 8 is a flange, which is connected to the end face of the mandrel 6 by multiple evenly distributed bolts, so that the mandrel 6 is subjected to uniform force.

[0054] The method of using the above-mentioned large ball joint bearing under load oscillation torque detection device is as follows:

[0055] Step 1: Install the fixing base 2 on the measuring frame 1, and connect the fixing base 2 and the measuring frame 1 with screws;

[0056] Step 2: Place the outer half ring 4, inner ring 5, spacer, and outer half ring 4 of the large ball joint bearing onto the fixed seat 2 in sequence (the front and back sides of the bearing are installed randomly). Place the cover plate 3 on the end face of the two outer half rings and use a torque wrench to tighten the screws connecting the cover plate 3 and the fixed seat 2 to ensure that each outer half ring 4 of the bearing is subjected to uniform force.

[0057] Step 3: Connect the rocker arm 7 to the spindle 6, and connect the lifting ring 9 to the spindle 6. Then, install the spindle 6 into the inner ring 5 of the bearing. Ensure that the rocker arm 7 can swing back and forth to drive the inner ring 5 of the bearing to swing back and forth within the self-aligning angle range, so as to realize the function of measuring the swing torque of the bearing.

[0058] Step 4: Connect the hook rod 10 to the lifting ring 9. When the inner ring 5 swings within the self-aligning angle range, the connection point between the lifting ring 9 and the hook rod is always at the center of the inner ring 5, and the load will not change due to the swing of the inner ring 5.

[0059] Step 5: Since the hook rod 10 is connected to the left side of the lever 11 of the load assembly, the cylinder 14 moves a distance through the piston rod 13, thereby driving the angled wedge 12 to lift the right side of the lever 11, thus realizing the application of load; the angled wedge 12 is designed with multiple inclined surfaces 122 and multiple plateau steps 121. The inclined surfaces 122 can apply multiple loads as required, and the plateau steps 121 can ensure that the applied load value is stable;

[0060] Step 6: Install the force gauge on the rotating mechanism of the rocker arm 7 and measure the load swing torque. The measured force multiplied by the distance of the rocker arm 7 is the value of the load swing torque of the bearing at that position.

[0061] After measuring the bearing using the above steps, install the fixed assembly on the measuring frame with the other side facing down, and then the other side of the bearing can be inspected.

[0062] The above-described embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features therein. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

Claims

1. A device for detecting the oscillating torque of a large ball joint bearing under load, characterized in that, include: Measuring frame, used to support and fix components; A fixing assembly is used to clamp the double outer ring of a large ball joint bearing. The clamping force on the double outer ring of the large ball joint bearing is along the axial direction of the double outer ring. The fixing assembly can be selectively and detachably installed on the measuring frame from both sides, and the center of the inner ring of the large ball joint bearing is located at the center of the fixing assembly. The mandrel assembly includes a mandrel detachably inserted in the inner ring of a large ball joint bearing, the mandrel having a shoulder abutting against an end face of the inner ring of the large ball joint bearing, and the mandrel assembly being detachably connected to the large ball joint bearing. The load assembly is detachably and movably connected to the spindle assembly. The connection point between the load assembly and the spindle assembly is located at the center of the inner ring of the large ball joint bearing. The load assembly applies different loads to the spindle assembly, causing the shoulder to antagonize the end face of the inner ring of the large ball joint bearing. The rocker arm connects to the spindle assembly and drives the spindle to swing, thereby causing the inner ring of the large ball joint bearing to swing.

2. The device for detecting the oscillating torque of a large ball joint bearing under load according to claim 1, characterized in that: The clamping force of the fixing component on each half of the outer ring of the large ball joint bearing is applied between the inner spherical surface and the outer circumferential surface of the half of the outer ring.

3. The load-bearing oscillation torque detection device for large ball joint bearings according to claim 2, characterized in that: The fixing assembly includes a fixing seat and a cover plate. The fixing seat is detachably mounted on the measuring frame, and the cover plate is detachably mounted above the fixing seat. A first convex ring is provided on the inner circumferential surface of the central hole of the fixing seat, and a second convex ring is provided on the inner circumferential surface of the central hole of the cover plate, which is spaced apart from the first convex ring. An annular clamping cavity for clamping the double outer ring is formed between the first convex ring and the second convex ring. The first convex ring and the second convex ring cooperate to clamp the double outer ring of the large ball joint bearing.

4. The load-bearing oscillation torque detection device for large ball joint bearings according to claim 3, characterized in that: The fixed base has protruding mounting parts around its perimeter, and the measuring frame has a horizontal support plate. The mounting parts can be placed on the support plate from both the front and back directions. The mounting parts and the support plate have multiple corresponding bolt mounting holes, and the mounting parts and the support plate are connected by bolts.

5. The load-bearing oscillation torque detection device for large ball joint bearings according to claim 3 or 4, characterized in that: The mounting base, cover plate, and spindle are made of aluminum alloy.

6. The device for detecting the oscillating torque of a large ball joint bearing under load according to claim 1, characterized in that: The load assembly includes a hook rod, a lever, an angled wedge, and a drive component. The lever has a fulcrum in the middle, one end of the lever is connected to the angled wedge, and the other end of the lever is connected to the hook rod. The hook rod is detachably connected to the spindle assembly. The angled wedge is connected to the drive component. The drive component causes the lever to swing by moving the angled wedge, thereby applying a load to the spindle assembly through the hook rod.

7. The load-bearing oscillation torque detection device for large ball joint bearings according to claim 6, characterized in that: The angled wedge is stepped, with multiple platform steps, and adjacent platform steps are connected by inclined surfaces.

8. The load-bearing oscillation torque detection device for large ball joint bearings according to claim 6, characterized in that: The drive component includes a cylinder and a piston rod. The piston rod is connected to an angled wedge. The cylinder pushes the angled wedge through the piston rod, thereby raising or lowering one end of the lever.

9. The load-bearing oscillation torque detection device for a large ball joint bearing according to claim 6, characterized in that: The mandrel assembly further includes a connecting plate and a lifting ring. The mandrel has a groove, the connecting plate is fixed in the groove, and the lifting ring is installed in the middle of the connecting plate. One end of the hook rod is hooked onto the lifting ring, and the hook connection point between the hook rod and the lifting ring is located at the center of the inner ring of the large ball joint bearing.

10. A method for using a load-bearing oscillation torque detection device for a large ball joint bearing, characterized in that, The large ball joint bearing used has a load swing torque detection device including a measuring frame, a fixing assembly, a spindle assembly, a load assembly, and a rocker arm. The fixing assembly includes a fixing seat and a cover plate. The fixing seat is detachably mounted on the measuring frame, and the cover plate is detachably mounted above the fixing seat. A first convex ring is provided on the inner circumference of the center hole of the fixing seat, and a second convex ring is provided on the inner circumference of the center hole of the cover plate, which is spaced apart from the first convex ring. An annular clamping cavity for clamping the double outer ring is formed between the first and second convex rings. The first and second convex rings cooperate to clamp the double outer rings of the large ball joint bearing. The load assembly includes a hook rod, a lever, an angled wedge, and a driving component. A fulcrum is provided in the middle of the lever. One end of the lever is connected to the angled wedge, and the other end of the lever is connected to the hook rod. The hook rod is connected to the spindle assembly. The system features a detachable connection, with an angled wedge connecting to a drive mechanism. The drive mechanism moves the angled wedge, causing a lever to swing, which in turn applies a load to the spindle assembly via a hook rod. The spindle assembly includes a spindle detachably inserted into the inner ring of a large ball joint bearing, a connecting plate, and a lifting ring. The spindle has a shoulder that abuts against one end face of the inner ring of the large ball joint bearing. The spindle has a groove, in which the connecting plate is fixed. The lifting ring is mounted in the middle of the connecting plate. One end of the hook rod is hooked onto the lifting ring, and the hook connection point between the hook rod and the lifting ring is located at the center of the inner ring of the large ball joint bearing. The spindle assembly is detachably connected to the large ball joint bearing. The rocker arm connecting to the spindle drives the inner ring of the large ball joint bearing to swing by oscillating the spindle. This method of use includes the following steps: Step 1: The mounting base is installed on the measuring frame, and the mounting base and the measuring frame are connected by screws. Step 2: Place the outer half ring, inner ring, spacer, and outer half ring of the large ball joint bearing on the fixed seat in sequence. Place the cover plate on the end face of the two outer half rings and tighten the screws connecting the cover plate and the fixed seat to ensure that each outer half ring of the large ball joint bearing is subjected to uniform force. Step 3: Connect the rocker arm to the spindle, connect the lifting ring to the spindle, and then install the spindle into the inner ring of the large ball joint bearing to ensure that the rocker arm swings back and forth, causing the inner ring of the large ball joint bearing to swing back and forth within the self-aligning angle range. Step 4: Connect the hook rod to the lifting ring. When the inner ring of the large ball joint bearing swings within the self-aligning angle range, the connection point between the lifting ring and the hook rod is always at the center of the inner ring of the large ball joint bearing, and the load remains unchanged. Step 5: The cylinder drives the angled wedge block to lift one end of the lever through the piston rod, and applies the load to the large ball joint bearing through the hook rod; Step 6: Connect a rotating mechanism to the rocker arm. Install a force gauge on the rotating mechanism that drives the rocker arm to measure the load swing torque. Multiply the measured force by the distance of the rocker arm to obtain the load swing torque value of the large ball joint bearing at that position.

Images