A tool for measuring runout

Abstract

This application belongs to the field of machining technology, specifically relating to a bearing clearance measuring tool. The clearance measuring tool is applied to a double-row tapered roller bearing and includes a support platform, a clamping assembly, and a drive assembly. The central axis of the double-row tapered roller bearing is perpendicular to the top surface of the support platform, and the inner ring facing the support platform is supported on the top surface of the support platform. The clamping assembly presses against the other inner ring, positioning the double-row tapered roller bearing between the clamping assembly and the support platform. The drive assembly includes a drive element and a pull rod. The drive element connects to the clamping assembly, and the two ends of the pull rod are respectively connected to the drive element and the support platform. The drive element can apply a specific pressure value to the inner ring. This application can apply a specific pressure value to the bearing inner ring through the drive element to meet the requirements of accurate bearing clearance measurement and can also adapt to the measurement of bearings of different sizes, exhibiting excellent practicality.

Description

Technical Field

[0001] This application belongs to the field of machining technology, specifically relating to a bearing clearance measuring tool. Background Technology

[0002] Double-row tapered roller bearings are a common type of rolling bearing, featuring two rows of tapered rollers arranged between the tapered raceways of the inner and outer rings. The outer (or inner) ring of a double-row tapered roller bearing is a single unit, with the small end faces of the two inner (or outer) rings close together and separated by a spacer. The clearance is adjusted by the thickness of the spacer.

[0003] Double-row tapered roller bearings require clearance measurement before leaving the factory as an important parameter. In addition, clearance needs to be remeasured before the bearings are installed and used as an important indicator for spare parts acceptance.

[0004] In related technologies, the clearance measurement of double-row tapered roller bearings cannot be achieved by applying accurate pressure to the two inner rings to improve the accuracy of the clearance measurement. Summary of the Invention

[0005] To address the aforementioned technical issues, this application provides a clearance measuring tool that can accurately apply precise pressure to the two inner rings, thereby improving the accuracy of clearance measurements.

[0006] This application is achieved through the following technical solution:

[0007] A clearance measuring tool is applied to a double-row tapered roller bearing. The double-row tapered roller bearing includes two inner rings, two retainers, an outer ring, tapered rollers, and spacers. The two inner rings are matingly disposed between the outer ring. The inner rings and the retainers are arranged in a one-to-one correspondence. The retainers are disposed between the outer ring and the corresponding inner ring. Each retainer contains one row of tapered rollers. The spacers are located between the two rows of tapered rollers. The clearance measuring tool includes: a support platform, the central axis of the double-row tapered roller bearing being perpendicular to the top surface of the support platform, and the inner ring facing the support platform being supported on the top surface of the support platform; a clamping assembly, which clamps the other inner ring to position the double-row tapered roller bearing between the clamping assembly and the support platform; and a drive assembly, including a drive member and a pull rod. The drive member is connected to the clamping assembly, and the two ends of the pull rod are respectively connected to the drive member and the support platform. The drive member can apply a specific pressure to the inner ring.

[0008] In some embodiments, the clamping assembly includes: a first pressure plate, the first pressure plate being spaced apart above the double-row tapered roller bearing; and at least two push rods, the at least two push rods being spaced apart around the double-row tapered roller bearing, the top end of the push rod being connected to the first pressure plate, and the bottom end of the push rod abutting against and pressing against another inner ring.

[0009] In some embodiments, the first pressure plate has an adjustment hole, the length direction of which is arranged radially parallel to the double-row tapered roller bearing. The adjustment hole and the push rod are arranged opposite each other. The top end of the push rod can move along the length direction of the adjustment hole and can be locked onto the first pressure plate.

[0010] In some embodiments, the push rod is provided with a first nut and a second nut, both of which are threaded onto the push rod and located on the top and bottom surfaces of the first pressure plate, respectively.

[0011] In some implementations, the adjustment hole extends to the circumferential surface of the first pressure plate.

[0012] In some embodiments, the drive member is fixed to the top of the first pressure plate; the top end of the pull rod is connected to the top of the drive member, the pull rod passes sequentially through the drive member, the first pressure plate and the double-row tapered roller bearing, and the bottom end of the pull rod is connected to the support platform.

[0013] In some embodiments, the drive assembly further includes: a second pressure plate pressing against the top of the drive member, the top end of the pull rod passing through the second pressure plate, and a third nut threadedly connected to the pull rod, the third nut being located on the top surface of the second pressure plate.

[0014] In some embodiments, the clearance measuring tool further includes a plurality of pads, which are circumferentially spaced around the double-row tapered roller bearing and are detachably disposed between the support platform and the inner ring facing the support platform.

[0015] In some implementations, the drive unit includes a jack connected to a hydraulic pump via a hydraulic pipe.

[0016] In some implementations, the drive element includes a linear spring.

[0017] The clearance measuring tool provided in this application first fixes the bearing between the support platform and the spacer of the clamping assembly when measuring the clearance value of the bearing. Then, it controls the drive component to output the detection pressure that conforms to the setting of the tapered roller bearing, obtains the average clearance between the two inner rings, and measures multiple points at the same time to obtain the average value H. Based on the pre-measured spacer size X, the bearing clearance HX can be obtained.

[0018] The clearance measuring tool provided in this application can meet the requirements for accurate measurement of bearing clearance by applying a specific pressure to the inner ring of the bearing through a driving component. At the same time, it can also be adapted to the measurement of bearings of different sizes, and has good practicality. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the clearance measuring tool 10 in one or more embodiments of this application is shown;

[0021] Figure 2 A schematic diagram of the structure of a double-row tapered roller bearing 20 is shown;

[0022] Figure 3 A schematic diagram of the structure of the first pressure plate 131 is shown;

[0023] Figure 4 A schematic diagram of the structure of a clearance measuring tool 10 according to another embodiment is shown.

[0024] Explanation of reference numerals in the attached figures:

[0025] 10. Clearance measuring tool; 110. Support platform; 120. Pad block; 130. Clamping assembly; 131. First pressure plate; 132. Push rod; 133. Adjustment hole; 134. First nut; 135. Second nut; 140. Drive assembly; 141. Drive component; 142. Tie rod; 143. Second pressure plate; 144. Third nut; 150. Hydraulic pump; 160. Hydraulic pipe; 20. Bearing; 210. Inner ring; 220. Retainer; 230. Outer ring; 231. Oil hole; 240. Tapered roller; 250. Spacer; 30. Wrench. Detailed Implementation

[0026] The technical solutions in this application will now be clearly and thoroughly described with reference to the accompanying drawings. Specifically, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0027] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0028] In related technologies, the main methods for measuring the bearing clearance of double-row tapered roller bearings are to measure the clearance value between the inner rings of the bearing (under the condition of removing the spacer rings) X, and to measure the width value H of the intermediate spacer ring. The difference between the two (HX) is the bearing clearance. When measuring X, it is necessary to compact the two rows of inner rings of the bearing. Appropriate pressure is applied to the two inner rings according to different bearing sizes in order to obtain an accurate bearing clearance.

[0029] The main drawback of the relevant measuring tools is that they cannot apply accurate pressure to the two inner rings to measure the clearance of double-row tapered roller bearings, thus affecting the accuracy of the clearance measurement. In addition, ordinary measuring tools are not widely applicable to bearings of different sizes.

[0030] To address the aforementioned technical issues, this application provides a clearance measuring tool that can accurately apply precise pressure to the two inner rings to improve the accuracy of clearance measurements; and it is adaptable to bearings of different sizes, thus having wide applicability.

[0031] Figure 1 A schematic diagram of the clearance measuring tool 10 in one or more embodiments of this application is shown. Figure 2 A schematic diagram of the structure of a double-row tapered roller bearing 20 is shown. (Combined with...) Figure 1 as well as Figure 2The clearance measuring tool 10 of this application is applied to a double-row tapered roller bearing 20 (hereinafter referred to as bearing 20). The bearing 20 includes two inner rings 210, two cages 220, an outer ring 230, tapered rollers 240, and a spacer 250. The two inner rings 210 are arranged in a cooperating manner between the outer rings 230. The inner rings 210 and the cages 220 are arranged in a one-to-one correspondence. The cages 220 are arranged between the outer rings 230 and the corresponding inner rings 210. Each cage 220 contains a row of tapered rollers 240. The spacer 250 is located between the two rows of tapered rollers 240 to separate the two rows of tapered rollers 240. The bearing 20 is a commonly used bearing 20 in related technologies; therefore, the specific structure of the bearing 20 will not be described in detail.

[0032] Combination Figure 1 The clearance measuring tool 10 includes a support platform 110, a clamping assembly 130, and a drive assembly 140. The central axis of the bearing 20 is perpendicular to the top surface of the support platform 110, and the inner ring 210 facing the support platform 110 is supported on the top surface of the support platform 110. The clamping assembly 130 presses against another inner ring 210 to position the bearing 20 between the clamping assembly 130 and the support platform 110. The drive assembly 140 includes a drive member 141 and a pull rod 142. The drive member 141 is connected to the clamping assembly 130, and the two ends of the pull rod 142 are respectively connected to the drive member 141 and the support platform 110. The drive member 141 can apply a specific pressure to the inner ring 210.

[0033] When measuring the clearance value of a bearing 20, the clearance measuring tool 10 provided in this application first fixes the bearing 20 between the support platform 110 and the clamping assembly 130. Then, the drive unit 141 is controlled to output a detection pressure that matches the setting of the tapered roller bearing 20, obtaining the average clearance between the two inner rings 210, and simultaneously measuring multiple points (e.g., four) to obtain the average value H. Then, based on the pre-measured spacer ring 250 dimension X, the clearance of the bearing 20 can be obtained as HX. The specific details of the clearance measuring tool 10 are now further described with reference to the accompanying drawings.

[0034] The support platform 110 of this application serves as the carrier of the entire measuring tool. It is fixedly installed at the relevant construction site. The top surface of the support platform 110 is smooth and located in a horizontal position. The support platform 110 is mostly made of metal, which is not easily deformed and has strong supporting force.

[0035] In some embodiments, the clearance measuring tool 10 further includes multiple pads 120. These pads 120 are spaced apart circumferentially around the bearing 20 and are detachably disposed between the support platform 110 and the inner ring 210 facing the support platform 110, such that the end face of the inner ring 210 below the bearing 20 contacts and supports the bearing 20. Since the support platform 110 is made of metal, to prevent the bearing 20 from directly contacting and impacting the support platform 110, this application provides multiple pads 120 on the support platform 110, allowing the bearing 20 to be suspended on the support platform 110, thus avoiding direct contact and impact. Furthermore, since the pads 120 are detachable, pads 120 of appropriate height can be selected according to the axial length of the bearing 20, improving the versatility of the measuring tool.

[0036] In specific implementations, the pad 120 can be made of nylon, which has a certain degree of elasticity. When measuring the bearing 20, the bearing 20 and the pad 120 can make flexible contact to avoid collisions when the bearing 20 is placed on the pad 120. Furthermore, two pads 120 can be provided, arranged opposite to each other. In other embodiments, more pads 120 can be provided; this application does not impose any limitations on this.

[0037] In some embodiments, the clamping assembly 130 includes a first pressure plate 131 and push rods 132. The first pressure plate 131 is spaced apart on the bearing 20. At least two push rods 132 are provided, spaced apart around the bearing 20. The top end of the push rod 132 is connected to the first pressure plate 131, and the bottom end of the push rod 132 abuts against and presses against another inner ring 210, that is, the end face of the upper inner ring 210. The push rods 132 ensure that the first pressure plate 131 is positioned on the bearing 20.

[0038] Figure 3 A schematic diagram of the structure of the first pressure plate 131 is shown. (Combined with...) Figure 3 In some embodiments, the first pressure plate 131 has an adjustment hole 133, the length direction of which is arranged radially parallel to the bearing 20. The adjustment hole 133 and the push rod 132 are arranged in a one-to-one correspondence. The top end of the push rod 132 can move along the length direction of the adjustment hole 133 and can be locked onto the first pressure plate 131. With this arrangement, the push rod 132 can be moved to a suitable position in the adjustment hole according to the inner diameter of the bearing 20 to be tested, so as to change the distance between the central axis of the push rod 132 and the first pressure plate 131, thereby enabling the measuring tool to adapt to bearings 20 with different inner diameters.

[0039] In specific implementation, the adjustment hole 133 is an oblong hole, with its length direction along the radial direction of the bearing 20. The adjustment hole 133 can extend to the circumferential surface of the first pressure plate 131, that is, the outer side of the adjustment hole 133 is open. The pull rod 142 can enter the adjustment hole 133 from the outside, so as to facilitate the entry of the pull rod 142 and improve the convenience of operation. In addition, there can be two push rods 132 respectively. In other embodiments, there can be more push rods 132. This application does not limit this.

[0040] In some embodiments, the push rod 132 is equipped with a first nut 134 and a second nut 135, both of which are threaded onto the push rod 132 and located on the top and bottom surfaces of the first pressure plate 131, respectively. The first nut 134 and the second nut 135 can lock the push rod 132 onto the first pressure plate 131. Simultaneously, the first nut 134 and the second nut 135 can be rotated according to the axial length of the bearing 20, allowing the first pressure plate 131 to accommodate measurements of bearings 20 with different axial lengths at a fixed height, thus facilitating the adjustment and fixation of the push rod 132 relative to the first pressure plate 131.

[0041] In some embodiments, the drive member 141 is fixed to the top of the first pressure plate 131, the top end of the pull rod 142 is connected to the top of the drive member 141, the pull rod 142 passes sequentially through the drive member 141, the first pressure plate 131, and the bearing 20, and the bottom end of the pull rod 142 is connected to the support platform 110. This configuration allows the pull rod 142 to lock the drive member 141 and the support platform 110, thereby enabling the drive member 141 to apply a force to the bearing 20 located between the drive member 141 and the support platform 110.

[0042] In some embodiments, the drive assembly 140 further includes a second pressure plate 143, which presses against the top of the drive member 141. The top end of the pull rod 142 passes through the second pressure plate 143, and a third nut 144 is threaded onto the pull rod 142. The third nut 144 is located on the top surface of the second pressure plate 143, so that the drive member 141 is fixed between the second pressure plate 143 and the first pressure plate 131. Furthermore, the length of the pull rod 142 extending beyond the second pressure plate 143 can be adjusted according to the bearing 20 length to be measured, so that the second pressure plate 143, at a fixed height, can accommodate the measurement of bearings 20 with different axial lengths, facilitating the adjustment and fixation of the pull rod 142 relative to the second pressure plate 143.

[0043] In practice, the tie rod 142 and the bearing 20 are coaxial or nearly coaxial. The bottom of the tie rod 142 is welded to the support platform 110 and is securely fixed to the support platform 110. The diameter of the tie rod 142 is smaller than the center hole diameter of the second pressure plate 143, the driving component 141, and the first pressure plate 131. The tie rod 142 passes through the center positions of the second pressure plate 143, the driving component 141, and the first pressure plate 131 from bottom to top. By rotating the third nut 144, the second pressure plate 143 and the structural components below can be compacted.

[0044] In addition, this application can adapt to the measurement of bearings 20 with different axial lengths by adjusting the combination of push rod 132 and pull rod 142, and has good applicability.

[0045] In some embodiments, the drive element 141 is a jack, which can be a hydraulic jack with a hollow piston rod, allowing the pull rod 142 to pass through it. Additionally, the jack is connected to the hydraulic pump 150 via a hydraulic pipe 160, serving as the power source for the inner ring 210 of the compaction bearing 20.

[0046] In practice:

[0047] Install the bearing 20 to be tested and the measuring tool in the positions shown in the diagram. Place the bearing 20 on the pad, adjust the position of the first push rod 132 to ensure that it abuts against the end face of the inner ring 210 of the bearing 20, and press the third nut 144 firmly to ensure that all structural components under the second pressure plate 143 are tightly attached.

[0048] First, pressurize the hydraulic pump and observe the pressure gauge. Press the pressure to the required pressure (when the double-row tapered roller 240 bearing 20 produced by a certain factory is inspected at the factory, the reference value of the preload is: outer diameter D200~440=approximately 150kg (±10); outer diameter D440~600=200~30 spacer 2500kg). Install the wrench 30 at the oil hole 231 position of the outer ring 230 of the bearing 20, and rotate the outer ring 230 of the bearing 20 to make the outer ring 230 and the inner ring 210 fully contact the rolling elements.

[0049] Using the gap between the inner rings 210 and 210 of the gauge block, measure four points and obtain the average value H.

[0050] Measure the size of the pre-extracted spacer 250 to obtain X, and the clearance of bearing 20 is HX.

[0051] Figure 4 A schematic diagram of the structure of a clearance measuring tool 10 according to another embodiment is shown. Figure 4 The clearance measuring tool shown is 10. Figure 1 The difference in the clearance measuring tool 10 shown is that: Figure 4 The drive element 141 of the clearance measuring tool 10 shown includes a linear spring, and the rest are the same. Figure 1The clearance measuring tool 10 shown is consistent with that of this application. Figure 3 The specific details of the clearance measuring tool 10 shown are not elaborated here. Figure 4 The clearance measuring tool 10 shown uses a linear spring as a drive element 141 to apply force to the inner ring 210 of the bearing 20. Its elastic force is linearly related to the deformation, so the required compression of the spring can be quickly calculated according to the force to be applied.

[0052] In summary, the clearance measuring tool 10 provided in this application can apply a specific pressure value to the inner ring 210 of the bearing 20 through the drive component 141 to meet the requirements for accurate measurement of the bearing 20 clearance. At the same time, it can also adapt to the measurement of bearings 20 of different sizes, and has good practicality.

[0053] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0054] In the description of this application, 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", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0055] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0056] In the description of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0057] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0058] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0059] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A clearance measuring tool applied to a double-row tapered roller bearing, the double-row tapered roller bearing comprising two inner rings, two cages, an outer ring, tapered rollers, and a spacer, wherein the two inner rings are matingly disposed between the outer ring, the inner rings and the cages are arranged in a one-to-one correspondence, the cages are disposed between the outer rings and the corresponding inner rings, each cage contains a row of tapered rollers, and the spacer is located between two rows of tapered rollers, characterized in that... The clearance measurement tool includes: A support platform, wherein the central axis of the double-row tapered roller bearing is perpendicular to the top surface of the support platform, and one of the inner rings is supported on the top surface of the support platform; A clamping assembly is used to press against another inner ring to position the double-row tapered roller bearing between the clamping assembly and the support platform. A drive assembly includes a drive component and a pull rod. The drive component is connected to the clamping assembly, and the two ends of the pull rod are respectively connected to the drive component and the support platform; wherein: The drive component can apply a specific pressure value to the inner ring.

2. The clearance measuring tool according to claim 1, characterized in that, The clamping assembly includes: The first pressure plate is spaced apart on the double-row tapered roller bearing; At least two push rods are provided, and the at least two push rods are spaced apart around the double-row tapered roller bearing. The top end of the push rod is connected to the first pressure plate, and the bottom end of the push rod abuts against and presses against another inner ring.

3. The clearance measuring tool according to claim 2, characterized in that, The first pressure plate has an adjustment hole, the length direction of which is arranged in a radial direction parallel to the double-row tapered roller bearing. The adjustment hole and the push rod are arranged in a one-to-one correspondence. The top end of the push rod can move along the length direction of the adjustment hole and can be locked onto the first pressure plate.

4. The clearance measuring tool according to claim 3, characterized in that, The top rod is equipped with a first nut and a second nut, both of which are threaded onto the top rod and located on the top and bottom surfaces of the first pressure plate, respectively.

5. The clearance measuring tool according to claim 3, characterized in that, The adjustment hole extends to the circumferential surface of the first pressure plate.

6. The clearance measuring tool according to claim 2, characterized in that, The driving component is fixed to the top of the first pressure plate; The top end of the pull rod is connected to the top of the drive component, and the pull rod passes sequentially through the drive component, the first pressure plate, and the double-row tapered roller bearing. The bottom end of the pull rod is connected to the support platform.

7. The clearance measuring tool according to claim 6, characterized in that, The driving component also includes: The second pressure plate is pressed against the top of the drive component. The top end of the pull rod passes through the second pressure plate. A third nut is threaded onto the pull rod and is located on the top surface of the second pressure plate.

8. The clearance measuring tool according to claim 1, characterized in that, The clearance measuring tool also includes a plurality of pads, which are spaced circumferentially around the double-row tapered roller bearing and are detachably disposed between the support platform and the inner ring facing the support platform.

9. The clearance measuring tool according to any one of claims 1-8, characterized in that, The driving component includes a jack, which is connected to a hydraulic pump via a hydraulic pipe.

10. The clearance measuring tool according to claim 9, characterized in that, The driving component includes a linear spring.

Images