A composite bearing runout torque measuring fixture

Abstract

This utility model relates to the field of bearing runout torque detection technology, and more particularly to a composite bearing runout torque measuring fixture. A composite bearing runout torque measuring fixture includes: a mounting base, balance bars respectively disposed at both ends of the mounting base, a composite flange bearing disposed between the two balance bars, and a detection component disposed at the end of one of the balance bars. The composite flange bearing is disposed close to the mounting base, and the shaft hole of the mounting base, the outer diameter of the balance bars, and the inner hole of the composite flange bearing are coaxially arranged. This utility model provides a composite bearing runout torque measuring fixture with advantages such as accurate measurement results, small error, high measurement precision, good stability and robustness, convenient assembly and disassembly, and low cost.

Description

Technical Field

[0001] This utility model relates to the field of bearing runout torque detection technology, and in particular to a composite bearing runout torque measuring fixture. Background Technology

[0002] Composite bearings are widely used in home appliances, industrial equipment, automobiles, ships, aerospace and other fields to meet the needs of different equipment and systems. Especially in the aerospace field, the precision requirements for this type of bearing are even higher, and it is necessary to achieve special runout function requirements, that is, the inner and outer rings of the bearing runout relative to each other within a certain runout torque range. Therefore, the influence factors of bearing runout torque need to be considered during the initial development and design of the bearing, and 100% factory testing of runout torque is carried out after the bearing is assembled.

[0003] Chinese patent CN113916533B discloses a scale-type detection device for the runout torque of aerospace flange bearings. The device includes a fixing component, a bearing fixing plate, a flange bearing, a scale display rod, fastening screws, weights, and other components. It utilizes a simple scale principle to measure the maximum and minimum runout torque of the bearing by suspending weights on a single-sided scale display rod.

[0004] However, this technical solution has the following drawbacks: 1. It does not consider the influence of the weight of the scale display rod on the measurement result of the yaw torque, which may make the measured yaw torque value too small; 2. The weight can only determine whether the bearing yaw torque value is within the qualified range, but cannot measure the specific value, and cannot provide a reference for subsequent bearing process improvement and similar product design; 3. The device has no positioning mechanism, and the operator needs to hold the bearing and then tighten it with fastening screws, which is inconvenient to operate and the disassembly and assembly steps are cumbersome, which greatly reduces the measurement efficiency and increases labor costs. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a composite bearing runout torque measuring fixture. The design of two balance bars reduces measurement errors; the detection component measures the specific value of the bearing runout torque, rather than simply determining whether it falls within the acceptable range, thus facilitating the optimization of bearing design parameters; and the positioning and clamping mechanism design, along with the auxiliary disassembly structure design, makes it easy for operators to disassemble and assemble bearings and the fixture.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A composite bearing runout torque measuring fixture includes: a mounting base, balance bars respectively disposed at both ends of the mounting base, a composite flange bearing disposed between the two balance bars, and a detection component disposed at the end of one of the balance bars. The composite flange bearing is disposed close to the mounting base, and the shaft hole of the mounting base, the outer diameter of the balance bar, and the inner ring hole of the composite flange bearing are coaxially disposed.

[0008] Preferably, the mounting base includes a base plate and a vertical plate disposed on the base plate, both in the shape of "T", and a reinforcing rib is provided between the base plate and the vertical plate.

[0009] Preferably, the balance bar on the side closer to the mounting base completely penetrates the mounting base, and the detection component is provided on the side of the balance bar away from the mounting base. The detection component includes: a suspension member sleeved on one side of the balance bar, a hook provided at the bottom of the suspension member, and a measuring member provided at the bottom of the hook and vertically arranged.

[0010] Preferably, the two balance bars are detachably connected. Specifically, the balance bar that penetrates the mounting base and mates with the inner hole of the composite flange bearing has an internal thread, while the balance bar that mates with the balance bar on the side away from the mounting base has an external thread. The internal and external threads form a threaded pair that can be used together, and the length of the internal thread is greater than the length of the external thread.

[0011] Preferably, the shoulder at one end of the balance bar abuts against the inner hole of the inner ring of the composite flange bearing, and the heights of the shoulders of the two balance bars are equal and both are less than the height of the shoulder of the inner ring of the composite flange bearing.

[0012] Preferably, hexagonal nuts are provided on each of the two balance bars, and the vertical distances from the two hexagonal nuts to the radial plane of the center of the composite flange bearing are equal, which facilitates the disassembly of the fixture with tools such as wrenches and sockets.

[0013] Preferably, an annular groove is provided on one side of each of the two hexagonal nuts, and the vertical distance from the two annular grooves to the radial plane of the center of the hexagonal nut is equal, with a groove width of 2mm to 4mm, which facilitates the placement of the hanging component.

[0014] Preferably, the locating pins on the mounting base are fitted with a plurality of locating holes on the composite flange bearing.

[0015] Preferably, the composite flange bearing is connected to the mounting base by a plurality of fasteners, the fasteners being offset from the locating pin.

[0016] Preferably, the two balance bars are symmetrically distributed with respect to the central radial plane of the composite flange bearing, and the two balance bars have equal weights, so that the torques on both sides remain balanced in the original state.

[0017] The beneficial effects of this utility model are as follows:

[0018] (1) This utility model can provide bidirectional support through the design of two balance bars, avoid the bearing inner ring tilt caused by single-sided cantilever, enhance the rigidity of the system, and can offset the radial offset of the bearing inner ring caused by gravity, ensuring that the rotation axis is consistent with the measurement reference of the detection component. Furthermore, the mounting base, balance bar and composite flange bearing are coaxially set to ensure that the rotation axis of the composite flange bearing coincides with the detection component, avoid the introduction of additional torque error due to eccentricity, and improve the measurement accuracy.

[0019] (2) This utility model can directly measure the specific value of the tensile force through the measuring component, and then directly calculate the specific value of the bearing runout torque through the formula, instead of just determining whether the bearing runout torque value is within the qualified range. This facilitates the optimization of the bearing's internal design parameters and provides design reference for bearings of the same type with different specifications and sizes.

[0020] (3) This utility model, through the dual design of positioning and clamping mechanism and auxiliary disassembly structure design, facilitates the operator to disassemble and install bearings and tooling, and can realize the measurement of the runout torque of different specifications of the same type of bearing, reducing the manufacturing cost of composite flange bearing measuring tooling.

[0021] In summary, this utility model has the advantages of accurate measurement results, small error, high measurement precision, good stability and robustness, convenient assembly and disassembly, and low cost. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;

[0023] Figure 2 for Figure 1 Enlarged view of point A;

[0024] Figure 3 This is a cross-sectional view of Embodiment 1 of the present utility model;

[0025] Figure 4 This is a schematic diagram of the overall structure of Embodiment 2 of this utility model. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] Example 1

[0029] like Figures 1-3 As shown, this embodiment provides a composite bearing runout torque measuring fixture, including: a mounting base 1, balance bars 2 respectively disposed at both ends of the mounting base 1, a composite flange bearing 3 disposed between the two balance bars 2, and a detection component 4 disposed at the end of one of the balance bars 2. The composite flange bearing 3 is disposed close to the mounting base 1, which can effectively shorten the cantilever length, reduce the leverage effect caused by gravity or external force, reduce the influence of system deformation on the measurement, and thus reduce the runout torque measurement error. The shaft hole 16 of the mounting base 1, the outer diameter of the balance bar 2, and the inner ring inner hole 31 of the composite flange bearing 3 are coaxially disposed to ensure that the rotation axis of the composite flange bearing 3 coincides with the detection component 4, avoid the introduction of additional torque error due to eccentricity, and improve the measurement accuracy.

[0030] The mounting base 1 includes a base plate 14 and an upright plate 15 disposed on the base plate 14. The two are in the shape of "T" to provide a stable vertical support surface, while leaving operating space to install the balance bar 2 and the detection component 4. A reinforcing rib 13 is provided between the base plate 14 and the upright plate 15. Specifically, it can be fixed by welding or threaded connection. The reinforcing rib 13 can enhance the bending stiffness of the base plate 14 and the upright plate 15, prevent the tooling from deforming due to the loading force, and thus ensure the overall stability and firmness of the mounting base 1.

[0031] Meanwhile, the detection component 4 includes: a suspension member 41 sleeved on one side of the balance bar 2, a hook 42 set at the bottom of the suspension member 41, and a measuring member 43 set at the bottom of the hook 42 and vertically arranged, to ensure that the direction of the loading force is always perpendicular to the balance bar 2, avoid the interference of the lateral component force on the torque calculation, and thus simplify the torque formula (force × lever arm), and directly calculate the result by taking the tension reading through the measuring member 43.

[0032] In this embodiment, the suspension member 41 is preferably a rope, which is used in conjunction with the hook 42 to ensure that the hook 42 will not fall off and to ensure stability during measurement.

[0033] In this embodiment, the measuring element 43 can be a spring balance to ensure measurement accuracy and to detect changes in tension in real time.

[0034] In this embodiment, the balance bar 2 on the side closer to the mounting base 1 completely penetrates the mounting base 1, and the detection component 4 is provided on the balance bar 2 on the side away from the mounting base 1. The two balance bars 2 can provide bidirectional support, avoid the bearing inner ring tilt caused by the single-sided cantilever, enhance the rigidity of the system, and can counteract the radial displacement of the bearing inner ring caused by gravity, ensuring that the rotation axis is consistent with the measurement reference of the detection component 4.

[0035] In this embodiment, the two balance bars 2 are detachably connected. Specifically, the end of the balance bar 2 that mates with the inner hole of the composite flange bearing 3 on the side closest to the mounting base 1 is provided with an internal thread, and the end of the balance bar 2 that mates with the balance bar 2 on the side furthest from the mounting base 1 is provided with an external thread. The internal and external threads form a threaded pair that can be used together. The length of the internal thread is greater than the length of the external thread, thereby ensuring the stability and firmness of the two balance bars 2.

[0036] In this embodiment, the shaft shoulder 21 at one end of the balance bar 2 abuts against the inner ring inner hole 31 of the composite flange bearing 3. The shaft shoulder 21 can both ensure that the two balance bars 2 are quickly installed onto the composite flange bearing 3, playing a quick positioning role, and can clamp the composite flange bearing 3 to ensure the stability of the tooling. Through the axial positioning of the shaft shoulder 21, it is ensured that the balance bar 2 only transmits torque and does not generate axial movement, thereby avoiding deformation of the bearing inner ring due to axial force, ensuring that the measured torque is pure yaw torque rather than composite torque. The shaft shoulders 21 of the two balance bars 2 are of equal height and are both smaller than the height of the inner ring shoulder of the composite flange bearing 3, ensuring that the balance bar 2 can be smoothly installed onto the composite flange bearing 3. The cooperation of the two makes the entire tooling more stable and firm.

[0037] In this embodiment, the positioning pin 11 on the mounting base 1 is adapted to the positioning holes 32 on the composite flange bearing 3 for easy positioning. This allows for quick and accurate alignment of the composite flange bearing 3 and the mounting base 1, ensuring repeatable positioning accuracy for each assembly, thereby reducing human adjustment errors and guaranteeing measurement accuracy.

[0038] In this embodiment, the composite flange bearing 3 and the mounting base 1 are connected by several fasteners 12, that is, the two are detachable, which makes it easy for the operator to disassemble and assemble the composite flange bearing 3 and the tooling. It can realize the measurement of the runout torque of different specifications of the same type of bearing and reduce the manufacturing cost of the composite flange bearing 3 measurement tooling.

[0039] In this embodiment, the fastener 12 and the positioning pin 11 are staggered, that is, they do not interfere with each other, thus avoiding interference with the measurement, preventing deformation of the composite flange bearing 3 during installation, and preventing the preload from introducing additional torque.

[0040] In this embodiment, the two balance bars 2 are symmetrically distributed with respect to the central radial plane of the composite flange bearing 3, and the two balance bars 2 have equal weights, eliminating the original torque (zero position error), so that the measured value directly reflects the bearing yaw torque, and no complicated calibration is required, simplifying the operation process and making the operation convenient.

[0041] Of course, hexagonal nuts 23 are provided on the two balance bars 2 respectively. The vertical distances of the two hexagonal nuts 23 to the central radial plane of the composite flange bearing 3 are equal. That is, the hexagonal nuts 23 are symmetrically distributed on both sides of the central radial plane of the composite flange bearing 3. Their outer surface is a six-sided cylinder, which makes it easy to disassemble the fixture with tools such as wrenches and sockets, that is, easy to disassemble and assemble.

[0042] In addition, annular grooves 22 are provided on one side of each of the two hexagonal nuts 23. The vertical distances from the two annular grooves 22 to the central radial plane of the hexagonal nuts 23 are equal. That is, the annular grooves 22 are symmetrically distributed on both sides of the central radial plane of the composite flange bearing 3. The annular grooves 22 and the hexagonal nuts 23 do not interfere with each other and are left with a distance. The groove width is preferably 2mm to 4mm, which facilitates the placement of the suspension component 41 and can effectively prevent the suspension component 41 from shifting position or falling off the balance bar 2.

[0043] Example 2

[0044] like Figure 4 As shown, this embodiment provides a method for measuring the runout torque of a composite bearing, which is implemented using a composite bearing runout torque measuring fixture as described in Embodiment 1. The testing method includes the following steps:

[0045] Step 1: Fixing the mounting base 1. Install the mounting base 1 on the workbench. Specifically, it can be fixed by installing four screws into the four threaded holes on the mounting base 1.

[0046] Step 2: Installation of composite flange bearing 3. Assemble composite flange bearing 3 on mounting base 1. Align the several positioning holes 32 of composite flange bearing 3 with the several positioning pins 11 mounted on mounting base 1. The bottom surface of composite flange bearing 3 is in contact with the surface of fixed vertical plate 15. Then use several fasteners 12 to fix and lock composite flange bearing 3 to mounting base 1.

[0047] Step 3: Installation of balance bar 2. One balance bar 2 passes through the shaft hole 16 of the mounting base 1 from the left side and mates with the inner ring inner hole 31 of the composite flange bearing 3. The shaft shoulder 21 abuts against the left inner ring shoulder. The other balance bar 2 approaches the inner ring inner hole 31 of the composite flange bearing 3 from the right side of the mounting base 1 until the shaft shoulder 21 abuts against the right inner ring shoulder. At this time, the two balance bars 2 are symmetrically distributed with respect to the central radial plane of the composite flange bearing 3, and the weight on both sides is equal. In the original state, the torque on both sides remains balanced.

[0048] Step 4: Installation and measurement of component 4. Suspend the suspension 41 in the annular groove 22 of the balance bar 2. After the reading of the measuring component 43 is zeroed, connect it to the suspension 41 through its hook 42. Then, slowly apply force vertically downward until the balance bar 2 rotates relative to the flange of the composite flange bearing 3. The reading of the measuring component 43 will no longer change. Record the tension value of the measuring component 43 at this time. Finally, calculate the specific value of the yaw moment using the formula.

[0049] Step 5: Disassembly of the fixture. First, remove the balance bar 2 on the side away from the mounting base 1 using disassembly tools. Specifically, you can use a wrench, socket, or other tools to remove the balance bar 2 from the hexagonal nut position on the balance bar 2. Then, lower the balance bar 2 at the end closest to the mounting base 1. Next, remove the fastener 12 and remove the composite flange bearing 3 from the mounting base 1. Repeat steps 2 to 4 to measure the next set of composite flange bearings 3.

[0050] Additionally, the tension value F1 measured by the measuring component 43, i.e., the spring balance, is in N (Newtons). The axial distance between the annular groove 22 on the balance bar 2 on the side away from the mounting base 1 and the center of the composite flange bearing 3 is a fixed value L1, in meters (m). This distance is calculated using the formula M1 = The specific value of the runout torque M1 of the composite flange bearing 3 can be obtained by calculating F1·L1, with the unit being N·m (Newton-meter). Specifically, the required runout torque value for a certain specification of composite flange bearing 3 is 5 N·m to 10 N·m. Using the above measurement methods, the tension value F1 measured by the spring balance is 30 N. The axial distance between the annular groove 22 and the center of the composite flange bearing 3 is a fixed value L1 = 0.2 m. The specific value of the runout torque M1 of the composite flange bearing 3 is calculated to be 6 N·m. Therefore, the runout torque value of this composite flange bearing 3 is deemed to be qualified. If the calculated runout torque of the composite flange bearing 3 is <5 N·m or >10 N·m, then the runout torque value of this composite flange bearing 3 is deemed to be unqualified.

[0051] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A composite bearing runout torque measuring tool characterized by, include: The assembly comprises a mounting base, balance bars respectively disposed at both ends of the mounting base, a composite flange bearing disposed between the two balance bars, and a detection component disposed at the end of one of the balance bars. The composite flange bearing is disposed close to the mounting base, and the shaft hole of the mounting base, the outer diameter of the balance bar, and the inner ring hole of the composite flange bearing are coaxially disposed.

2. The combined type bearing runout torque measuring tool according to claim 1, characterized in that, The mounting base includes a base plate and a vertical plate disposed on the base plate, both in the shape of "T", and a reinforcing rib is provided between the base plate and the vertical plate.

3. The combined type bearing runout torque measuring tool according to claim 1, characterized in that, The balance bar on the side closest to the mounting base completely penetrates the mounting base, and the detection component is provided on the side of the balance bar away from the mounting base. The detection component includes: a suspension member provided on one side of the balance bar, a hook provided at the bottom of the suspension member, and a measuring member provided at the bottom of the hook and vertically arranged.

4. The combined type bearing runout torque measuring tool according to claim 3, characterized in that, The two balance bars are detachably connected. The balance bar that passes through the mounting base and mates with the inner hole of the composite flange bearing has an internal thread, while the balance bar that mates with the balance bar on the side away from the mounting base has an external thread. The internal and external threads form a threaded pair that can be used together. The length of the internal thread is greater than the length of the external thread.

5. The combined type bearing runout torque measuring tool according to claim 1, characterized in that, The shoulder at one end of the balance bar abuts against the inner hole of the inner ring of the composite flange bearing. The shoulders of the two balance bars are of equal height and are both less than the height of the shoulder of the inner ring of the composite flange bearing.

6. The composite bearing runout torque measuring fixture according to claim 1, characterized in that, Hexagonal nuts are provided on each of the two balance bars, and the two hexagonal nuts are equidistant from the radial plane of the center of the composite flange bearing.

7. The composite bearing runout torque measuring fixture according to claim 6, characterized in that, An annular groove is provided on one side of each of the two hexagonal nuts. The vertical distance from the two annular grooves to the radial plane of the center of the hexagonal nut is equal, and the groove width is 2mm~4mm.

8. The composite bearing runout torque measuring fixture according to claim 5, characterized in that, The locating pins on the mounting base are fitted to several locating holes on the composite flange bearing.

9. A composite bearing runout torque measuring fixture according to claim 8, characterized in that, The composite flange bearing is connected to the mounting base by a number of fasteners, which are offset from the locating pin.

10. A composite bearing runout torque measuring fixture according to claim 1, characterized in that, The two balance bars are symmetrically distributed with respect to the central radial plane of the composite flange bearing, and the two balance bars have equal weights, so that the torques on both sides remain balanced in the original state.

Images