Knuckle bearing axial clearance detection tool

Abstract

The utility model discloses a joint bearing axial clearance detection tool, which comprises a pressing unit, a loading unit and a detection unit, and is characterized in that the pressing unit comprises an outer ring pressing assembly and an inner ring fixing assembly, and the outer ring pressing assembly presses and fixes an outer ring of a joint bearing; the inner ring fixing assembly fixes an inner ring of the knuckle bearing in the axial direction. The loading unit comprises a loading push rod, and the loading push rod can be controlled to push and pull the inner ring of the knuckle bearing with a set load so as to drive the inner ring of the knuckle bearing to move relative to the outer ring of the knuckle bearing in the axial direction; the detection unit comprises a displacement detector, and the displacement detector is used for detecting the axial clearance of the knuckle bearing; the pressing unit can respectively fix the inner ring and the outer ring of the joint bearing to be detected, the loading unit drives the inner ring to move relative to the outer ring with a set load, and the detection unit feeds back the size of the axial clearance through the displacement of the guide shaft or the pressing block. The detection tool provided by the utility model can effectively detect the size of the axial clearance of the knuckle bearing.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bearing detection technical field relates to a joint bearing axial clearance detection frock. BACKGROUND

[0002] Joint bearing is a kind of sliding bearing of special structure, its structure is relatively simple, mainly by one outer spherical inner ring and one inner spherical outer ring is composed.Joint bearing can bear larger load, according to its different types and structure, can bear radial load, axial load or radial, axial combined load that exists simultaneously.Joint bearing must have certain clearance to complete swing, tilt and rotation, and the appropriate axial clearance is crucial to the performance and service life of joint bearing;Too small clearance can cause joint bearing to be stuck, and too large clearance can cause joint bearing to be worn or fatigue failure early.In use, the clearance between inner ring and outer ring will increase constantly, so during the service life, joint bearing needs to be measured regularly.

[0003] Prior art is usually measured by dial gauge the difference of bearing inner and outer ring end face or judges the tightness of inner and outer ring by hand feeling, this method is easy to produce error, and the measurement precision is not high, if the problem appears after final assembly, needs to be disassembled, measured, installed again, it is time-consuming and laborious, the working sliding surface of joint bearing inner and outer ring is all half spherical surface, outer ring and inner ring can swing mutually, and the commonly used height measuring instrument also cannot measure this parameter.And, joint bearing is assembled into parts by interference fit and applying certain locking force, and the axial clearance of joint bearing after installation in parts will change with the interference amount and the size of locking force, so when measuring clearance, load force also needs to be loaded on bearing joint, and the traditional bearing clearance measuring device that can load load is often complex, and load force is often realized by lever principle in the form of metal weight, its shortcomings are that load force in clearance measurement process cannot be accurately guaranteed, and when different load forces are applied, it needs to be converted according to force arm, it is easy to cause calculation error, and the center of gravity of weight also can affect the application of load force.

[0004] To solve the above problems, a detection frock is needed, which can not only effectively control the load size, but also effectively measure the axial clearance of bearing. Utility model content

[0005] Therefore, the utility model provides a kind of joint bearing axial clearance detection tool, and the inner ring and outer ring of the joint bearing to be detected can be fixed respectively by compression unit, and the load is directly applied to the inner ring by loading unit, the inner ring is moved relative to the outer ring by the set load, and the displacement of the inner ring relative to the outer ring is not directly detected by detection unit, but the displacement of the inner ring relative to the outer ring is fed back by the displacement of guide shaft or pressing block, i.e.

[0006] The utility model discloses a kind of joint bearing axial clearance detection tool, comprising:

[0007] Compression unit, including outer ring compression subassembly and inner ring fixed subassembly, the outer ring compression subassembly includes pressing plate and compression seat, the outer ring of joint bearing can be fixed by the pressing plate and be operated to the top surface of the compression seat;The inner ring fixed subassembly includes guide shaft and pressing block, the guide shaft is arranged in the inner ring of joint bearing, and the pressing block is installed on the guide shaft;The inner ring of joint bearing is clamped and fixed in the axial direction by the guide shaft and the pressing block;

[0008] Loading unit, including loading push rod, the loading push rod is connected to the guide shaft or pressing block, and the loading push rod can be operated to drive the inner ring of the joint bearing to move relative to the outer ring of joint bearing in the axial direction by the set load push and pull the guide shaft or pressing block;

[0009] Detection unit, including displacement detection meter, the displacement detection meter has displacement detection probe, and the displacement detection probe is abutted on the top surface of the pressing block to detect the clearance of the axial direction of joint bearing.

[0010] Further, the loading unit further includes bottom plate and driving assembly installed on the bottom plate, the driving assembly includes driving backplate, the driving backplate can be driven to reciprocate along the single degree of freedom of the axial direction of joint bearing, and the loading push rod is arranged on the driving backplate.

[0011] Further, the loading unit further includes push-pull force meter for detecting the load of loading push rod, the push-pull force meter is fixedly installed on the driving backplate, the push-pull force meter is provided with detection rod, and the loading push rod is coaxially connected to the detection rod.

[0012] Further, the detection unit further includes support table and connecting arm, the support table is fixed to the top surface of the bottom plate, one end of the connecting arm is provided with the displacement detection meter, and the other end is fixedly installed on the support table to form a cantilever structure.

[0013] Further, the outer ring compression assembly further comprises a compression connecting rod, a compression hammer and a hinged seat, the compression seat is fixed to the base, the hinged seat is fixed to the top surface of the compression seat, the compression connecting rod comprises a handle, an intermediate rod and a compression rod, the handle has a hinged end and an operating end, the hinged end is hinged to the hinged seat, the two ends of the intermediate rod are hinged to the middle of the handle and the middle of the compression rod respectively, the rear end of the compression rod is hinged to the hinged seat, and the compression hammer is slidably arranged on the front part of the compression rod in the length direction of the compression rod.

[0014] Further, the compression seat is provided with a guide hole, the guide shaft is slidably inserted into the guide hole, the guide shaft has a stepped structure, the top of the guide shaft is detachably arranged on the loading push rod, the compression block is arranged on the guide shaft, the top surface of the compression block is attached to the bottom surface of the loading push rod, and the bottom surface of the compression block abuts against the top surface of the knuckle bearing.

[0015] Further, the connecting arm comprises a first cantilever and a second cantilever which are connected to each other and perpendicular to each other, the displacement detection meter is arranged on the first cantilever, and the second cantilever is arranged on the top surface of the support table.

[0016] Further, the driving assembly further comprises a guide column, a limiting top plate, a driving rod and a sliding block, the guide column is arranged in the axial direction of the knuckle bearing, the sliding block is slidably arranged on the guide column, the limiting top plate is arranged on the guide column and used for limiting the sliding stroke of the sliding block, the driving back plate is arranged on the sliding block, and the driving rod is connected to the sliding block and used for driving the sliding block to slide.

[0017] Further, the driving rod is a threaded rod, the sliding block is provided with a threaded hole matched with the threaded rod, the end of the driving rod is sequentially arranged through the threaded hole of the limiting top plate and the sliding block and then rotationally connected to the bottom plate, the first end of the driving rod is fixedly arranged with a rotating handle, and the rotating handle can be rotationally controlled to drive the driving rod to slide the sliding block.

[0018] Further, the outer ring compression assembly further comprises a pad, the two ends of the compression plate are respectively overlapped with the top surface of the outer ring of the knuckle bearing and the top surface of the pad, and the compression hammer can be controlled to compress the middle part of the compression plate; the compression plate is further provided with a avoiding groove for avoiding the compression block.

[0019] The utility model discloses the following beneficial effects:

[0020] The utility model provides a knuckle bearing axial clearance detection frock, and the inner ring and the outer ring of the knuckle bearing to be detected can be fixed respectively by the compression unit, the loading unit directly loads the push -and -pull force on the inner ring, and the inner ring is driven to move relative to the outer ring under the set load, and the detection unit does not detect the displacement of the inner ring directly, but the displacement of the inner ring relative to the outer ring is fed back through the displacement of the guide shaft or the pressing block, that is, the axial clearance, the detection frock of the utility model can detect the size of the knuckle bearing axial play effectively, and can guarantee the loading consistency, can improve the inspection efficiency, reduces the inspection cost and error rate. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the isometric view of the utility model;

[0022] Figure 2 It is the front view of the utility model;

[0023] Figure 3 It is the left view of the utility model;

[0024] Figure 4 It is the sectional view of A-A in the utility model; Figure 2

[0025] Figure 5 It is the front view of the compression unit of the utility model;

[0026] Figure 6 It is the assembly structure isometric view of the compression connecting rod, compression hammer and hinged seat of the utility model;

[0027] Figure 7 It is the assembly structure front view of the compression connecting rod, compression hammer and hinged seat of the utility model;

[0028] Figure 8 It is the assembly structure plan view of the compression connecting rod, compression hammer and hinged seat of the utility model;

[0029] Figure 9 It is the sectional view of B-B in the utility model; Figure 8

[0030] Figure 10 It is the structure schematic view of the detection unit of the utility model;

[0031] Figure 11 It is the plan view of the detection unit of the utility model;

[0032] Figure 12 It is the structure schematic view of the compression plate of the utility model. DETAILED DESCRIPTION

[0033] ​​It should be noted that in the description of the present application, the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. The axial direction in the embodiment is based on the joint bearing to be detected, which can be understood by those skilled in the art, and will not be described here.

[0034] As shown in the figure, the utility model discloses a kind of joint bearing axial gap detection frock, including:

[0035] The utility model discloses a kind of detection tool for joint bearing axial clearance, including compression unit 1, detection unit 2 and loading unit, wherein, compression unit 1 includes outer ring compression assembly and inner ring fixed assembly, the outer ring compression assembly includes pressing plate 12 and compression seat 18, the outer ring 15 of joint bearing can be operated and is compressed and fixed to the top surface of the compression seat 18 by pressing plate 12;The inner ring fixed assembly includes guide shaft 13 and pressing block 14, the inner ring 16 of joint bearing is passed in guide shaft 13, and the pressing block 14 is installed to guide shaft 13;Guide shaft 13 and the pressing block 14 are clamped and fixed in the axial direction to the inner ring 16 of joint bearing;Loading unit includes loading push rod 3, and the loading push rod 3 is connected to guide shaft 13 or pressing block 14, and loading push rod 3 can be operated to set load push-pull guide shaft 13 or pressing block 14 to drive the inner ring 16 of the joint bearing in the axial direction relative to the outer ring 15 of joint bearing moves;Detection unit 2 includes displacement detection gauge 17, and the displacement detection gauge 17 has displacement detection probe 1701, and displacement detection probe 1701 is abutted on the top surface of the pressing block 14 for detecting the clearance of the axial direction of joint bearing.In the embodiment, outer ring compression assembly is mainly fixed to the outer ring 15 of joint bearing to be detected by pressing plate 12 and compression seat 18, to avoid its sway to influence detection result, and inner ring 16 is connected to loading push rod 3 under the cooperation of guide shaft 13 and pressing block 14, and loading push rod 3 is responsible for loading to inner ring 16 (including push force and pull force), under the action of set load, loading push rod 3 pushes inner ring 16 compression unit whole and moves, to drive bearing inner ring 16 relative to outer ring 15 moves, under this structure, the clearance between inner and outer rings 15 is the displacement of guide shaft 13 or pressing block 14, and the displacement detection probe 1701 of the percentage table of the embodiment of displacement detection gauge 17 is abutted on the top surface of the pressing block 14, and displacement detection gauge 17 detects the displacement of the pressing block 14, to indirectly detect the axial clearance of joint bearing.The utility model fixes the inner ring 16 and the outer ring 15 of joint bearing to be detected respectively, ensures that bearing is fixed stably, and also will not influence detection result, and loading unit is directly loaded to push-pull force in inner ring 16, to set load drive inner ring 16 relative to outer ring 15 moves, and detection unit 2 is not directly detected the displacement of inner ring 16, but the displacement of inner ring 16 relative to outer ring 15 moves, i.e.

[0036] In the embodiment, the loading unit further comprises a bottom plate 10, a driving assembly mounted on the bottom plate 10, and a push-pull force gauge 4 for detecting the load of the loading push rod 3. The driving assembly comprises a driving back plate 5 which can be driven to reciprocate along the axial direction of the joint bearing, and the loading push rod 3 is arranged on the driving back plate 5. The push-pull force gauge 4 is fixedly mounted on the driving back plate 5, and the push-pull force gauge 4 is provided with a detection rod 401, and the loading push rod 3 is coaxially connected to the detection rod 401. The driving back plate 5 is driven to move to generate a load and act on the inner ring fixing assembly through the loading push rod 3. In the embodiment, the loading push rod 3 is a split stepped shaft which is connected to the guide shaft 13 and the detection rod 401 of the push-pull force gauge 4 through threaded connection. Meanwhile, the pressing seat 18 is provided with a guide hole, the guide shaft 13 is slidingly inserted into the guide hole to facilitate the detection of the axial gap, and the guide shaft 13 also has a stepped structure. The pressing block 14 is sleeved on the guide shaft 13, the top surface of the pressing block 14 is attached to the bottom surface of the loading push rod 3, and the bottom surface of the pressing block 14 abuts against the top surface of the joint bearing. After assembly, the guide shaft 13 is arranged in the inner ring 16, the shaft shoulder of the guide shaft 13 and the pressing block 14 fix the inner ring in the axial direction, and the size of the load can be directly observed through the push-pull force gauge 4, so as to control the load applied to the inner ring 16.

[0037] In the embodiment, the driving assembly further comprises a guide column 6, a limiting top plate 8, a driving rod 11 and a sliding block 9. The guide column 6 is arranged along the axial direction of the joint bearing. The sliding block 9 is slidingly mounted on the guide column 6 and can be driven to slide. The limiting top plate 8 is mounted on the guide column 6 to limit the sliding stroke of the sliding block 9. The driving back plate 5 is mounted on the sliding block 9. The driving rod 11 is connected to the sliding block 9 to drive the sliding block 9 to slide. In the embodiment, the driving rod 11 is a threaded rod. The sliding block 9 is provided with a threaded hole which is threadedly connected to the driving rod 11. The end of the driving rod 11 is sequentially inserted into the threaded holes of the limiting top plate 8 and the sliding block 9 and is rotationally connected to the bottom plate 10. The first end of the driving rod 11 is fixedly mounted with a rotating handle 7. The rotating handle 7 can be rotated to drive the driving rod 11 to drive the sliding block 9 to slide. As shown in the figure, the driving rod 11 can be an electric push rod, a pneumatic push rod or other structures. In the embodiment, a threaded rod is selected as the driving rod 11. The sliding block 9 is driven to slide through the threaded connection, the sliding block 9 drives the driving back plate 5 to move, and the inner ring 16 is pushed and pulled to make the inner ring 16 relatively move with the outer ring 15. In the embodiment, two guide columns 6 are arranged, and the limiting top plate 8 and the guide rod are mounted on the bottom plate 10 to form a portal structure. The driving rod 11 is arranged between the two guide columns 6, and the top of the driving rod 11 is mounted with a disc-shaped rotating handle 7 to drive the aforementioned driving rod 11 to rotate.

[0038] In the embodiment, the detection unit 2 further comprises a support table 27 fixed to the top surface of the bottom plate 10 and a connecting arm having one end provided with the displacement detection meter 17 and the other end fixed to the support table 27 to form a cantilever structure. In the embodiment, the connecting arm comprises a first cantilever 25 and a second cantilever 26 connected to each other and perpendicular to each other, the displacement detection meter 17 is mounted on the first cantilever 25, and the second cantilever 26 is mounted on the top surface of the support table 27. As shown in the figure, in the embodiment, the connecting arm is arranged in a cantilever structure, which can effectively reduce the error of the displacement detection meter 17.

[0039] In the embodiment, the outer ring pressing assembly further comprises a pressing connecting rod, a pressing hammer 21 and a hinged seat 20, the pressing seat 18 is fixed to the base, the hinged seat 20 is fixed to the top surface of the pressing seat 18, the pressing connecting rod comprises a handle 22, an intermediate rod 24 and a pressing rod 23, the handle 22 has a hinged end and an operating end, the hinged end is hinged to the hinged seat 20, the two ends of the intermediate rod 24 are respectively hinged to the middle part of the handle 22 and the middle part of the pressing rod 23, the rear end of the pressing rod 23 is hinged to the hinged seat 20, and the pressing hammer 21 is mounted on the front part of the pressing rod 23 in a manner that can be operated to slide in the length direction of the pressing rod 23, and the operating end of the handle 22 can be operated to swing to drive the pressing hammer 21 to approach or move away from the pressing plate 12. As shown in the figure, the hammer head of the pressing hammer 21 is pressed on the top surface of the pressing plate 12, the hinged seat 20 is fixed on the top surface of the pressing seat 18, and the pressing connecting rod has multiple hinged structures, which can control the swinging of the pressing hammer 21 by swinging the operating end to press on the pressing plate 12 or move away from the pressing plate 12 to contact the pressing plate 12.

[0040] In the embodiment, the outer ring pressing assembly further comprises a pressing connecting rod, a pressing hammer 21 and a hinged seat 20, the pressing seat 18 is fixed to the base, the hinged seat 20 is fixed to the top surface of the pressing seat 18, the pressing connecting rod comprises a handle 22, an intermediate rod 24 and a pressing rod 23, the handle 22 has a hinged end and an operating end, the hinged end is hinged to the hinged seat 20, the two ends of the intermediate rod 24 are respectively hinged to the middle part of the handle 22 and the middle part of the pressing rod 23, the rear end of the pressing rod 23 is hinged to the hinged seat 20, and the pressing hammer 21 is mounted on the front part of the pressing rod 23 in a manner that can be operated to slide in the length direction of the pressing rod 23, and the operating end of the handle 22 can be operated to swing to drive the pressing hammer 21 to approach or move away from the pressing plate 12. As shown in the figure, the hammer head of the pressing hammer 21 is pressed on the top surface of the pressing plate 12, the hinged seat 20 is fixed on the top surface of the pressing seat 18, and the pressing connecting rod has multiple hinged structures, which can control the swinging of the pressing hammer 21 by swinging the operating end to press on the pressing plate 12 or move away from the pressing plate 12 to contact the pressing plate 12.

[0041] Finally, it is explained that the above embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the purpose and scope of the present application. The technical solutions of the present application should be covered in the scope of the claims of the present application.

Claims

1. A fixture for detecting the axial clearance of a spherical plain bearing, characterized in that, include: A clamping unit includes an outer ring clamping assembly and an inner ring fixing assembly. The outer ring clamping assembly includes a pressure plate and a clamping seat. The pressure plate can be operated to clamp and fix the outer ring of the spherical plain bearing to the top surface of the clamping seat. The inner ring fixing assembly includes a guide shaft and a pressure block. The guide shaft passes through the inner ring of the spherical plain bearing, and the pressure block is mounted on the guide shaft. The guide shaft and the pressure block clamp and fix the inner ring of the spherical plain bearing axially. The loading unit includes a loading push rod connected to the guide shaft or pressure block. The loading push rod can be manipulated to push and pull the guide shaft or pressure block with a set load to drive the inner ring of the spherical plain bearing to move axially relative to the outer ring of the spherical plain bearing. The detection unit includes a displacement sensor with a displacement detection probe, which abuts against the top surface of the pressure block to detect the axial clearance of the spherical bearing.

2. The axial clearance detection fixture for spherical plain bearings according to claim 1, characterized in that: The loading unit further includes a base plate and a drive assembly mounted on the base plate. The drive assembly includes a drive back plate, which can be driven to reciprocate along the axial direction of the spherical bearing with a single degree of freedom. The loading push rod is flexibly disposed on the drive back plate.

3. The axial clearance detection fixture for spherical bearings according to claim 2, characterized in that: The loading unit also includes a push-pull force gauge for detecting the load on the loading push rod. The push-pull force gauge is fixedly installed on the drive back plate. The push-pull force gauge is provided with a detection rod, and the loading push rod is coaxially connected to the detection rod.

4. The axial clearance detection fixture for spherical plain bearings according to claim 2, characterized in that: The detection unit also includes a support platform and a connecting arm. The support platform is fixed to the top surface of the base plate. One end of the connecting arm is equipped with the displacement sensor, and the other end is fixedly installed on the support platform to form a cantilever structure.

5. The axial clearance detection fixture for spherical plain bearings according to claim 2, characterized in that: The outer ring clamping assembly further includes a clamping connecting rod, a clamping hammer, and a hinge seat. The clamping seat is fixed to the base plate, and the hinge seat is fixed to the top surface of the clamping seat. The clamping connecting rod includes a handle, a middle rod, and a pressure rod. The handle has a hinged end and an operating end. The hinged end is hinged to the hinge seat. The two ends of the middle rod are respectively hinged to the middle of the handle and the middle of the pressure rod. The rear end of the pressure rod is hinged to the hinge seat. The clamping hammer is mounted on the front of the pressure rod in a manner that allows it to slide along the length of the pressure rod. The operating end of the handle can be manipulated to swing, thereby driving the clamping hammer closer to or away from the pressure plate.

6. The axial clearance detection fixture for spherical bearings according to claim 5, characterized in that: The clamping seat is provided with a guide hole, the guide shaft is slidably inserted into the guide hole, the guide shaft has a stepped structure, the top of the guide shaft is detachably installed on the loading push rod, the pressure block is sleeved on the guide shaft, the top surface of the pressure block is in contact with the bottom surface of the loading push rod, and the bottom surface of the pressure block abuts against the top surface of the spherical bearing.

7. The axial clearance detection fixture for spherical bearings according to claim 4, characterized in that: The connecting arm includes a first cantilever and a second cantilever that are connected to each other and perpendicular to each other. The displacement sensor is installed on the first cantilever and the second cantilever is installed on the top surface of the support platform.

8. The axial clearance detection fixture for spherical plain bearings according to claim 2, characterized in that: The drive assembly further includes a guide post, a limiting top plate, a drive rod, and a slider. The guide post is arranged along the axial direction of the spherical bearing. The slider is slidably mounted on the guide post. The limiting top plate is mounted on the guide post to limit the sliding stroke of the slider. The drive back plate is mounted on the slider. The drive rod is connected to the slider to drive the slider to slide.

9. The axial clearance detection fixture for spherical plain bearings according to claim 8, characterized in that: The drive rod is a threaded rod, and the slider is provided with a threaded hole that is threaded to the drive rod. The end of the drive rod passes through the threaded holes of the limiting top plate and the slider in sequence and is rotatably connected to the base plate. A rotating handle is fixedly installed at the head end of the drive rod. The rotating handle can be rotated to drive the slider to slide.

10. The axial clearance detection fixture for spherical bearings according to claim 5, characterized in that: The outer ring clamping assembly also includes a pad block. The two ends of the pressure plate are respectively attached to the top surface of the outer ring of the spherical bearing and the top surface of the pad block. The clamping hammer can be controlled to press against the middle of the pressure plate. The pressure plate is also provided with a clearance groove to avoid the pressure block.

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