CN114754655B - Wheel bearing play measuring device and method - Google Patents
Wheel bearing play measuring device and method Download PDFInfo
- Publication number
- CN114754655B CN114754655B CN202210441601.0A CN202210441601A CN114754655B CN 114754655 B CN114754655 B CN 114754655B CN 202210441601 A CN202210441601 A CN 202210441601A CN 114754655 B CN114754655 B CN 114754655B
- Authority
- CN
- China
- Prior art keywords
- assembly
- bearing
- bearing assembly
- moving
- wheel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title abstract description 16
- 238000005259 measurement Methods 0.000 claims description 48
- 230000006835 compression Effects 0.000 claims description 16
- 238000007906 compression Methods 0.000 claims description 16
- 238000003825 pressing Methods 0.000 claims description 12
- 125000006850 spacer group Chemical group 0.000 claims description 11
- 238000000691 measurement method Methods 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 3
- 239000003921 oil Substances 0.000 description 43
- 230000000149 penetrating effect Effects 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/14—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures
- G01B5/146—Measuring arrangements characterised by the use of mechanical techniques for measuring distance or clearance between spaced objects or spaced apertures measuring play on bearings
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0025—Measuring of vehicle parts
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The present invention provides a wheel bearing play measuring apparatus and method for measuring play of a bearing assembly after being mounted to a wheel, the wheel bearing play measuring apparatus comprising: the positioning assembly is fixedly connected with the wheel; a first moving assembly movably disposed on the positioning assembly and detachably coupled to the bearing assembly to urge the bearing assembly to move prior to assembly of the axle with the wheel; the second moving assembly is movably arranged on the positioning assembly and is detachably connected with the axle so as to push the axle to move after the axle is assembled with the wheel; and the measuring assembly is used for measuring the moving distance of the bearing assembly pushed by the first moving assembly and the moving distance of the axle bridge pushed by the second moving assembly. The wheel bearing clearance measuring device solves the problems that the wheel bearing clearance in the prior art is inconvenient to measure and the measuring result is inaccurate.
Description
Technical Field
The invention relates to the technical field of railway vehicles, in particular to a wheel bearing clearance measuring device and a wheel bearing clearance measuring method.
Background
The low-floor tramcar is an effective traffic form for relieving urban traffic, has wide application at home and abroad, and is gradually popularized in China at present. According to the running characteristics of the low-floor vehicle, the independent wheel structure is the key of the stable running of the vehicle, and generally comprises an elastic wheel, an axle and related grounding devices, wherein a bearing is a core part of the independent wheel, and the assembly process and the play assurance are key processes, so that the bearing play is a core process of the production process of the low-floor vehicle.
Aiming at the existing bearing clearance measurement, the existing bearing clearance measurement is generally carried out by adopting a craft similar to the existing car structure, and the method is inconvenient to operate and inaccurate in measurement.
Disclosure of Invention
The invention mainly aims to provide a wheel bearing clearance measuring device and a wheel bearing clearance measuring method, which are used for solving the problems that the wheel bearing clearance measurement in the prior art is inconvenient and the measurement result is inaccurate.
In order to achieve the above object, according to one aspect of the present invention, there is provided a wheel bearing play measuring apparatus for measuring a play of a bearing assembly after being mounted to a wheel, the wheel bearing play measuring apparatus comprising: the positioning assembly is fixedly connected with the wheel; a first moving assembly movably disposed on the positioning assembly and detachably coupled to the bearing assembly to urge the bearing assembly to move prior to assembly of the axle with the wheel; the second moving assembly is movably arranged on the positioning assembly and is detachably connected with the axle so as to push the axle to move after the axle is assembled with the wheel; and the measuring assembly is used for measuring the moving distance of the bearing assembly pushed by the first moving assembly and the moving distance of the axle bridge pushed by the second moving assembly.
Further, the first moving assembly includes: a first driving lever; the plurality of compacting plates are respectively connected with the first driving rod to move under the driving of the first driving rod, wherein the plurality of compacting plates are arranged in one-to-one correspondence with the plurality of bearings on the bearing assembly to respectively drive the corresponding bearings to move.
Further, the plurality of pressing plates includes: the first pressing plate is in abutting connection with the first end of a first bearing on the bearing assembly; the second compaction plate is in butt connection with a second end of a second bearing on the bearing assembly, wherein the first end and the second end are symmetrically two ends along the axial direction of the bearing assembly.
Further, the first actuating lever is the screw rod, and locating component includes the locating plate, and the locating plate is fixed on the wheel, and wherein, the screw rod wears to establish on the locating plate, and first removal subassembly still includes first actuating mechanism, and first actuating mechanism is connected with first actuating lever in order to drive first actuating lever and to fix a position the board relatively and remove, and first actuating mechanism includes: the first adjusting nut is arranged on the screw rod and is positioned on one side of the positioning plate; the second adjusting nut is arranged on the screw rod, wherein the first adjusting nut and the second adjusting nut are respectively positioned at two sides of the positioning plate so as to respectively drive the screw rod to move relative to the positioning plate.
Further, a spacer is arranged between two adjacent bearings, and two ends of the spacer are respectively abutted with two opposite end surfaces of the two bearings.
Further, the second moving assembly includes: the second driving rod is movably arranged relative to the positioning assembly and is connected with the axle bridge; and the second driving mechanism is in driving connection with the second driving rod so as to drive the shaft bridge to move along the axial direction of the bearing assembly through the second driving rod.
Further, the second driving mechanism includes: the first driving oil cylinder and the second driving oil cylinder are respectively in driving connection with the second driving rod so as to respectively drive the second driving rod to move.
Further, the positioning assembly comprises a guide frame, the second moving assembly further comprises a first moving plate and a second moving plate, the first moving plate and the second moving plate are respectively and movably arranged on the guide frame along the axial direction of the bearing assembly, the second driving rod is a screw rod, the screw rod is respectively arranged on the first moving plate and the second moving plate in a penetrating way, and the first driving oil cylinder is in driving connection with the first moving plate so as to drive the second driving rod to move through the first moving plate; the second driving oil cylinder is in driving connection with the second moving plate so as to drive the second driving rod to move through the second moving plate.
Further, the first driving oil cylinder and the second driving oil cylinder are symmetrically arranged between the first moving plate and the second moving plate, wherein the first driving oil cylinder is fixed on the first moving plate, the second driving oil cylinder is fixed on the second moving plate, a positioning stop block is arranged between the first driving oil cylinder and the second driving oil cylinder, the positioning stop block is fixedly connected with the guide frame, and the first driving oil cylinder and the second driving oil cylinder are respectively connected with the positioning stop block.
Further, the measuring assembly employs a dial gauge.
According to another aspect of the present invention, there is provided a wheel bearing play measurement method for measuring play between a bearing assembly and a wheel, the play of the bearing assembly after mounting to the wheel being measured using the wheel bearing play measurement apparatus described above, the wheel bearing play measurement method comprising a first measurement before axle assembly and a second measurement after axle assembly, wherein the first measurement comprises: mounting the bearing assembly to the wheel and applying a first preset force to the bearing assembly in an axial direction of the bearing assembly by the first moving assembly until the bearing assembly stops moving; applying a second preset force to the bearing assembly along the axial direction of the bearing assembly through the first moving assembly until the bearing assembly stops moving, and measuring the moving distance of the bearing assembly after the second preset force is applied by the measuring assembly, wherein the first preset force and the second preset force are opposite to each other along the axial direction; the second measurement includes: applying a third preset force in the axial direction of the bearing assembly to the bearing assembly through the second moving assembly after the axle and the bearing assembly are cooperatively mounted to the wheel until the bearing assembly stops moving; and applying a fourth preset force to the bearing assembly along the axial direction of the bearing assembly through the second moving assembly until the bearing assembly stops moving, wherein the measuring assembly measures the moving distance of the bearing assembly after the second preset force is applied, and the third preset force and the fourth preset force are opposite forces along the axial direction.
Further, a rotational force is applied to the bearing assembly after the first preset force is applied and/or the second preset force is applied to test whether the bearing assembly is rotated.
Further, the measuring assembly adopts a dial indicator for measurement, and the step of measuring the distance of the bearing assembly pushed by the first moving assembly for moving during the first measurement comprises the following steps: fixing the dial indicator on the wheel and enabling the indicator head of the dial indicator to be in contact with the end face of the bearing assembly or enabling the indicator head of the dial indicator to be in contact with the first moving assembly; setting the dial indicator to zero when the first moving assembly applies a first preset force to the bearing assembly along the axial direction of the bearing assembly until the bearing assembly stops moving; and when the first moving assembly applies a second preset force to the bearing assembly along the axial direction of the bearing assembly, reading the value on the dial indicator until the bearing assembly stops moving so as to acquire the moving distance of the bearing assembly after the second preset force is applied.
Further, the measuring component adopts a dial indicator to measure, and the step of measuring the distance of the bearing component pushed by the second moving component to move by the measuring component during the second measurement comprises the following steps: fixing the dial indicator on the axle and enabling the head of the dial indicator to be abutted with the wheel; setting the dial indicator to zero when the second moving assembly applies a third preset force to the bearing assembly along the axial direction of the bearing assembly until the bearing assembly stops moving; and reading the numerical value on the dial indicator when the second moving assembly applies a fourth preset force to the bearing assembly along the axial direction of the bearing assembly until the bearing assembly stops moving so as to acquire the moving distance of the bearing assembly after the fourth preset force is applied.
The wheel bearing play measuring apparatus to which the technical scheme of the present invention is applied is mainly used for measuring play of a bearing assembly after being mounted to a wheel, including measuring play of the bearing assembly after being mounted to the wheel and before assembling a axle, and measuring play of the bearing assembly after assembling the axle with the wheel, and includes: the positioning assembly, the first moving assembly, the second moving assembly and the measuring assembly are fixedly connected with the wheel and can be fixed in a screw connection mode; wherein the first moving assembly is movably arranged on the positioning assembly and is detachably connected with the bearing assembly so as to push the bearing assembly to move before the axle and the wheel are assembled; when measuring the play of the bearing assembly before the axle assembly, the bearing assembly is matched with the measuring assembly to carry out measurement in a mode that the first moving assembly pushes the bearing assembly to move, the bearing assembly can comprise a plurality of bearings, and the first moving assembly pushes each bearing to move simultaneously by abutting each bearing in the bearing assembly. The second moving assembly is movably arranged on the positioning assembly and is detachably connected with the axle so as to push the axle to move after the axle is assembled with the wheel; the second moving assembly is mainly used for measuring the clearance of the bearing assembly after the axle and the wheel are assembled, the bearing assembly is pushed to move by the second moving assembly to cooperate with the measuring assembly for measurement, and the measuring assembly is used for measuring the moving distance of the bearing assembly pushed by the first moving assembly and the moving distance of the axle pushed by the second moving assembly. The invention simultaneously solves the problem of measuring the clearance of the bearing assemblies before and after the axle bridge and the wheel are assembled through the arrangement.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 shows a cross-sectional view of one embodiment of a wheel bearing play measurement device according to the present invention;
FIG. 2 shows a cross-sectional view of a first moving assembly embodiment of the wheel bearing play measuring device of the present invention;
FIG. 3 shows a schematic side view of a first moving assembly embodiment of the wheel bearing play measuring device of the present invention;
FIG. 4 shows a cross-sectional view of another embodiment of a wheel bearing play measuring device according to the present invention;
fig. 5 shows a cross-sectional view of a second movement assembly embodiment of a wheel bearing play measuring device according to the invention.
Wherein the above figures include the following reference numerals:
10. a first moving assembly; 11. a first driving lever; 12. a compacting plate; 131. a first bearing; 132. a second bearing; 141. a first adjustment nut; 142. a second adjustment nut; 20. a second moving assembly; 21. a second driving lever; 221. a first drive cylinder; 222. a second driving cylinder; 231. a first moving plate; 232. a second moving plate; 24. positioning a stop block; 25. a buckle cover; 26. a thrust bearing; 30. a measurement assembly; 40. a wheel; 50. a shaft bridge; 61. a positioning plate; 62. a guide frame; 70. and a spacer bush.
Detailed Description
It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
The invention provides a device and a method for measuring wheel bearing clearance, which aim to solve the problems of inconvenient measurement of the wheel bearing clearance and inaccurate measurement result in the prior art.
The wheel bearing play measuring apparatus of the present invention is mainly for measuring play of a bearing assembly after being mounted to a wheel 40, including measuring play of the bearing assembly after being mounted to the wheel 40 and before assembling a bridge 50, and measuring play of the bearing assembly after assembling the bridge 50 with the wheel 40, and includes: the positioning assembly, the first moving assembly 10, the second moving assembly 20 and the measuring assembly 30 are fixedly connected with the wheel 40 and can be fixed by means of screw connection and the like; wherein the first movement assembly 10 is movably disposed on the positioning assembly and is detachably coupled to the bearing assembly to urge the bearing assembly to move prior to assembly of the axle 50 with the wheel 40; in measuring the play of the bearing assembly prior to assembly of the axle 50, the bearing assembly may include a plurality of bearings, with the first moving assembly 10 pushing the bearing assembly to move in cooperation with the measuring assembly 30, with the first moving assembly 10 pushing each bearing simultaneously through abutment with each bearing within the bearing assembly. The second moving assembly 20 is movably disposed on the positioning assembly and detachably connected with the axle 50 to push the axle 50 to move after the axle 50 is assembled with the wheel 40; the second moving assembly 20 is mainly used for measuring the clearance of the bearing assembly after the axle 50 is assembled with the wheel 40, the bearing assembly is pushed by the second moving assembly 20 to move, the measuring assembly 30 is matched with the measuring assembly 30 to measure the moving distance of the bearing assembly pushed by the first moving assembly 10 and the moving distance of the axle 50 pushed by the second moving assembly 20. The present invention solves the problem of backlash measurement of the bearing assembly before and after assembly of the axle 50 with the wheel 40 by the arrangement described above.
In this embodiment, in order to enable the first moving assembly 10 to be connected to each bearing and push each bearing to move, the first moving assembly 10 includes a first driving rod 11 and a plurality of pressing plates 12, where the plurality of pressing plates 12 are connected to the first driving rod 11 respectively and move under the driving of the first driving rod 11, and the plurality of pressing plates 12 are disposed in one-to-one correspondence with the plurality of bearings on the bearing assembly so as to drive the corresponding bearings to move respectively. The pressure strip 12 adopts the annular plate, the centre of pressure strip 12 is equipped with the screw hole, first actuating lever 11 adopts the screw rod, each pressure strip 12's screw hole is passed to first actuating lever 11, can realize simultaneously driving each pressure strip 12 and remove through driving first actuating lever, thereby promote corresponding bearing and remove, be equipped with first butt face and second butt face on the pressure strip 12, first butt face and second butt face are connected in two vertically faces of bearing respectively, wherein, the first butt face of pressure strip 12 is in the internal surface butt of bearing, the second butt face has guaranteed the tight connection between pressure strip 12 and the bearing in the side butt of bearing.
The plurality of compacting plates 12 comprise a first compacting plate and a second compacting plate, the first compacting plate is in abutting connection with a first end of a first bearing 131 on the bearing assembly; the second hold-down plate is in abutting connection with a second end of a second bearing 132 on the bearing assembly, wherein the first and second ends are symmetrically two ends along the axial direction of the bearing assembly.
As shown in fig. 1 and 2, the bearing assembly includes two bearings corresponding to a first pressing plate and a second pressing plate, respectively, which are positioned at opposite sides of the entire bearing assembly, respectively, when the first driving rod 11 moves leftwards in fig. 1, the first pressing plate pushes the first bearing 131 to move leftwards, and the first bearing 131 pushes the second bearing 132 to move leftwards through the spacer 70, thereby realizing the leftwards movement of the entire bearing assembly, and similarly, when the first driving rod 11 moves rightwards, the second pressing plate is driven to move, thereby pushing the second bearing 132 to move rightwards, and the second bearing 132 pushes the first bearing 131 to move rightwards through the spacer 70, thereby moving the entire bearing assembly rightwards.
In order to realize the movement of the whole first moving assembly 10, according to one embodiment, the first driving rod 11 is a screw rod, as shown in fig. 3, the positioning assembly comprises a positioning plate 61, two ends of the positioning plate 61 are respectively fixed on the wheels 40 through screws, wherein the screw rod is arranged in a threaded hole in the middle of the positioning plate 61 in a penetrating way, the first moving assembly 10 further comprises a first driving mechanism, the first driving mechanism is connected with the first driving rod 11 to drive the first driving rod 11 to move relative to the positioning plate 61, the first driving mechanism comprises a first adjusting nut 141 and a second adjusting nut 142, and the first adjusting nut 141 is arranged on the screw rod and is positioned on one side of the positioning plate 61; the second adjustment nuts 142 are disposed on the screw, wherein the first adjustment nuts 141 and the second adjustment nuts 142 are respectively located at both sides of the positioning plate 61, and the screw is respectively driven to move leftwards or rightwards relative to the positioning plate 61 by rotating the first adjustment nuts 141 or the second adjustment nuts 142.
A spacer 70 is arranged between two adjacent bearings, two ends of the spacer 70 are respectively abutted with two opposite end surfaces of the two bearings, and the spacer 70 not only can realize the positioning of the distance between the bearings, but also can transfer force between the bearings.
The second moving assembly 20 includes a second driving rod 21 and a second driving mechanism, and the second driving rod 21 is movably disposed with respect to the positioning assembly and connected with the axle 50;
the second drive mechanism is in driving connection with the second drive rod 21 for driving the shaft bridge 50 through the second drive rod 21 in the axial direction of the bearing assembly.
When the axle 50 is mounted on the wheel 40, the bearing assembly is located between the axle 50 and the wheel 40, so that relative rotation between the axle 50 and the wheel 40 can be ensured, the second moving assembly 20 is detachably connected with the bearing assembly, when bearing play of the axle 50 after being assembled with the wheel 40 needs to be measured, the second moving assembly 20 is connected with the positioning assembly, then the second driving rod 21 of the second moving assembly 20 is connected with the axle 50, and the axle 50 is moved to drive the bearing assembly to move by pushing the second driving rod 21 to move.
The second driving mechanism comprises a first driving oil cylinder 221 and a second driving oil cylinder 222, and the first driving oil cylinder 221 and the second driving oil cylinder 222 are respectively in driving connection with the second driving rod 21 so as to respectively drive the second driving rod 21 to move. The positioning assembly comprises a guide frame 62, the second moving assembly 20 further comprises a first moving plate 231 and a second moving plate 232, the first moving plate 231 and the second moving plate 232 are respectively and movably arranged on the guide frame 62 along the axial direction of the bearing assembly, the second driving rod 21 is a screw rod, the screw rod is respectively arranged on the first moving plate 231 and the second moving plate 232 in a penetrating way, and the first driving oil cylinder 221 is in driving connection with the first moving plate 231 so as to drive the second driving rod 21 to move through the first moving plate 231; the second driving oil cylinder 222 is in driving connection with the second moving plate 232, so as to drive the second driving rod 21 to move through the second moving plate 232. The first driving oil cylinder 221 and the second driving oil cylinder 222 are symmetrically arranged between the first moving plate 231 and the second moving plate 232, wherein the first driving oil cylinder 221 is fixed on the first moving plate 231, the second driving oil cylinder 222 is fixed on the second moving plate 232, a positioning stop block 24 is arranged between the first driving oil cylinder 221 and the second driving oil cylinder 222, the positioning stop block 24 is fixedly connected with the guide frame 62, and the first driving oil cylinder 221 and the second driving oil cylinder 222 are respectively connected with the positioning stop block 24.
As shown in fig. 4 and 5, in this embodiment, the second driving rod 21 is driven to move by two cylinders respectively, specifically, the positioning assembly adopts the guide frame 62, the guide frame 62 includes a plurality of guide rods, the plurality of guide rods are circumferentially disposed at one end of the wheel 40 and are respectively connected with the wheel 40, wherein each guide rod extends along the axial direction of the bearing assembly, the first moving plate 231 and the second moving plate 232 are sleeved on each guide rod and can slide along the guiding direction of the guide rod, the first driving cylinder 221 and the second driving cylinder 222 are disposed between the first moving plate 231 and the second moving plate 232, the cylinder body of the first driving cylinder 221 is disposed on the first moving plate 231, the cylinder body of the second driving cylinder 222 is disposed on the second moving plate 232, the piston rod of the first driving cylinder 221 is disposed opposite to the piston rod of the second driving cylinder 222, opposite to the head, a positioning stop block 24 is arranged between the first driving oil cylinder 221 and the second driving oil cylinder 222, the positioning stop block 24 is fixed, two ends of the positioning stop block 24 are respectively in driving connection with a piston rod of the first driving oil cylinder 221 and a piston rod of the second driving oil cylinder 222, when the first driving oil cylinder 221 works, the second driving oil cylinder 222 does not work, at the moment, the piston rod of the first driving oil cylinder 221 stretches out relative to the cylinder body, and the cylinder body of the first driving oil cylinder 221 moves leftwards due to the fact that the positioning stop block 24 is not moved, so that the first moving plate 231 is pushed to move leftwards, the first moving plate 231 drives the second driving rod 21 to move leftwards, the second driving rod 21 pushes the buckling cover 25 to move leftwards, the buckling cover 25 pushes the axle bridge 50 to move leftwards, the axle bridge 50 drives all bearings in the bearing assembly to move leftwards, and similarly, when the piston rod of the second driving oil cylinder 222 is deep relative to the cylinder body, because the positioning stop block 24 is not understood, the cylinder body of the second driving cylinder 222 moves rightward, and finally the bearing assembly is pushed to move rightward by the second moving plate 232, the second driving rod 21, the buckle cover 25, and the axle 50.
According to one embodiment, a thrust bearing 26 is disposed between the first drive cylinder 221 and the positioning block 24, and a right thrust bearing 26 is also disposed between the second drive cylinder 222 and the positioning block 24.
The measurement assembly 30 employs a dial gauge or other measurement tool, such as a ranging sensor or the like.
The present invention also provides a wheel bearing play measurement method for measuring play between a bearing assembly and a wheel 40, the wheel bearing play measurement method comprising a first measurement before assembly of a axle 50 and a second measurement after assembly of the axle 50, wherein,
the first measurement includes:
step S1: mounting the bearing assembly to the wheel 40 and applying a first preset force to the bearing assembly in an axial direction of the bearing assembly by the first moving assembly 10 until the bearing assembly stops moving;
step S2: the preset force and until the bearing assembly stops moving, the measuring assembly 30 measures the distance that the bearing assembly moves after applying a second preset force, wherein the first preset force and the second preset force are forces opposite to each other in the axial direction;
the measuring assembly 30 uses a dial indicator to measure, and the step of measuring the distance by which the bearing assembly is moved by the first moving assembly 10 is measured by the measuring assembly 30 during the first measurement includes:
fixing the dial indicator on the wheel 40 and enabling the indicator head of the dial indicator to be in contact with the end face of the bearing assembly or enabling the indicator head of the dial indicator to be in contact with the first moving assembly 10;
setting the dial indicator to zero when the first moving assembly 10 applies a first preset force to the bearing assembly in the axial direction of the bearing assembly until the bearing assembly stops moving;
and when the first moving assembly 10 applies a second preset force to the bearing assembly along the axial direction of the bearing assembly, reading the value on the dial indicator until the bearing assembly stops moving so as to acquire the moving distance of the bearing assembly after the second preset force is applied.
It should be noted that, in the first measurement, the first driving rod 11 of the first moving assembly 10 is composed of a screw, a cone nut, a first compression plate, a second compression plate, a thrust bearing 26, a first compression nut, a first adjustment nut 141, a second adjustment nut 142, a fixing plate, and a fastening nut. When the novel compression device is used, the wheel 40 is flatly placed in advance, then the second compression plate and the second bearing 132, the spacer 70, the first compression plate and the first bearing 131 are sequentially formed, then the screw rod passes through each compression plate 12, and the conical nut and the first compression nut are screwed, wherein the conical nut is positioned on one side, far away from the first compression plate, of the second compression plate and sleeved on the screw rod, and the first compression nut is positioned on one side, far away from the second compression plate, of the first compression plate and sleeved on the screw rod.
The positioning plate 61 is assembled to the wheel 40 bolt holes by fastening bolts, and then the remaining components are assembled.
When the tool is assembled: a) The cone nut is required to be tightly attached to the second compacting plate; b) The first compression plate and the second compression plate are tightly combined with the corresponding end surfaces of the bearing; c) And a gap exists between the screw and the circumference of the threaded hole of the first compacting plate. Through the operation, the tool assembly can be effectively ensured to be correct, and the clearance measurement is accurate.
After the assembly is completed, the clearance measurement is carried out according to the following steps:
1) After the tooling assembly is completed, adsorbing the dial indicator magnetic meter seat on the wheel 40, attaching the dial indicator head to the screw head, and then rotating the bearing forward and backward for more than one turn to realize normal matching of all parts of the bearing;
2) Applying rated torque on the second adjusting nut 142 by adopting a torque wrench, then rotating the bearing forward and backward for more than one circle, and setting the dial indicator head to zero;
3) The second adjusting nut 142 is loosened, then rated torque is applied to the first adjusting nut 141, the bearings are rotated for more than one circle in the forward and reverse directions respectively, and then the gauge head indication number is read, and the indication number is the play value before the bearing assembly.
The second measurement includes:
applying a third predetermined force to the bearing assembly in the axial direction of the bearing assembly through the second moving assembly 20 after the axle 50 is mounted to the wheel 40 in cooperation with the bearing assembly until the bearing assembly stops moving;
the fourth preset force in the axial direction of the bearing assembly is applied to the bearing assembly by the second moving assembly 20 until the bearing assembly stops moving, and the measuring assembly 30 measures the distance the bearing assembly moves after the second preset force is applied, wherein the third preset force and the fourth preset force are forces opposite to each other in the axial direction. The measuring assembly 30 uses a dial indicator to measure, and the step of measuring the distance that the second moving assembly 20 pushes the bearing assembly to move by the measuring assembly 30 includes:
fixing the dial indicator on the axle 50, and enabling the head of the dial indicator to be abutted against the wheel 40;
setting the dial indicator to zero when the second moving assembly 20 applies a third preset force to the bearing assembly in the axial direction of the bearing assembly until the bearing assembly stops moving;
and reading the value on the dial indicator until the second moving assembly 20 applies a fourth preset force to the bearing assembly in the axial direction of the bearing assembly until the bearing assembly stops moving so as to acquire the moving distance of the bearing assembly after the fourth preset force is applied.
And applying a rotational force to the bearing assembly after applying the first preset force and/or applying the second preset force to test whether the bearing assembly rotates. The first preset force and the second preset force are rotating forces, and whether the bearings are blocked or swayed or not is observed through rotating the bearings.
It should be noted that the bearing assembled play measurement structure mainly includes a process buckle cover 25, a screw, a first driving cylinder 221, a second driving cylinder 222, a thrust bearing 26, a positioning stop 24, a guide frame 62, a first moving plate 231, a second moving plate 232, a guide nut, and the like. When in use, the process buckle cover 25 is assembled at the shaft end of the shaft bridge 50, then the screw rod is screwed into the threaded hole of the process buckle cover 25, the guide rod of the guide frame 62 is an M6 screw rod, the M6 screw rod is screwed into the threaded hole of the elastic wheel 40, and then the first moving plate 231, the second moving plate 232, the first driving oil cylinder 221, the second driving oil cylinder 222, the thrust bearing 26, the positioning stop block 24 and the guide nut are assembled at one time.
When the tool is assembled: a) A gap exists between the process buckle cover 25 and the shaft end storefront of the shaft bridge 50; b) The first moving plate 231 and the second moving plate 232 are consistent with the distance of the end surface of the elastic wheel 40, and no inclination exists; c) The first driving oil cylinder 221, the second driving oil cylinder 222 and the adjacent cover plate leave a gap of not less than 1 mm. Through the operation, the tool assembly can be effectively ensured to be correct, and the clearance measurement is accurate.
After the assembly is completed, the clearance measurement is carried out according to the following steps:
1) After the tooling assembly is completed, adsorbing the dial indicator magnetic meter seat on the axle 50, attaching the dial indicator head to the wheel 40, and then rotating the bearing forward and backward for more than one circle to realize the normal matching of all parts of the bearing;
2) Applying hydraulic oil with certain rated pressure on the first driving oil cylinder 221, then rotating the bearing forward and backward for more than one circle, and setting the dial indicator head to zero;
3) Releasing the oil pressure of the first driving oil cylinder 221, inputting the rated pressure hydraulic oil on the second driving oil cylinder 222, rotating the bearing for more than one circle in the forward and reverse directions respectively, and reading the gauge head indicating number, wherein the indicating number is the play value after the bearing is assembled.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
the wheel bearing play measuring apparatus of the present invention is mainly for measuring play of a bearing assembly after being mounted to a wheel 40, including measuring play of the bearing assembly after being mounted to the wheel 40 and before assembling a bridge 50, and measuring play of the bearing assembly after assembling the bridge 50 with the wheel 40, and includes: the positioning assembly, the first moving assembly 10, the second moving assembly 20 and the measuring assembly 30 are fixedly connected with the wheel 40 and can be fixed by means of screw connection and the like; wherein the first movement assembly 10 is movably disposed on the positioning assembly and is detachably coupled to the bearing assembly to urge the bearing assembly to move prior to assembly of the axle 50 with the wheel 40; in measuring the play of the bearing assembly prior to assembly of the axle 50, the bearing assembly may include a plurality of bearings, with the first moving assembly 10 pushing the bearing assembly to move in cooperation with the measuring assembly 30, with the first moving assembly 10 pushing each bearing simultaneously through abutment with each bearing within the bearing assembly. The second moving assembly 20 is movably disposed on the positioning assembly and detachably connected with the axle 50 to push the axle 50 to move after the axle 50 is assembled with the wheel 40; the second moving assembly 20 is mainly used for measuring the clearance of the bearing assembly after the axle 50 is assembled with the wheel 40, the bearing assembly is pushed by the second moving assembly 20 to move, the measuring assembly 30 is matched with the measuring assembly 30 to measure the moving distance of the bearing assembly pushed by the first moving assembly 10 and the moving distance of the axle 50 pushed by the second moving assembly 20. The present invention solves the problem of backlash measurement of the bearing assembly before and after assembly of the axle 50 with the wheel 40 by the arrangement described above.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the authorization specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (12)
1. A wheel bearing play measuring device for measuring play of a bearing assembly after mounting to a wheel (40), the wheel bearing play measuring device comprising:
the positioning assembly is fixedly connected with the wheel (40);
-a first movement assembly (10), said first movement assembly (10) being movably arranged on said positioning assembly and being detachably connected to a bearing assembly to push said bearing assembly to move before the axle (50) is assembled with said wheel (40);
-a second movement assembly (20), said second movement assembly (20) being movably arranged on said positioning assembly and being detachably connected to said axle (50) for pushing said axle (50) to move after assembly of said axle (50) with said wheel (40);
-a measuring assembly (30), the measuring assembly (30) being adapted to measure the distance the first moving assembly (10) pushes the bearing assembly to move and the distance the second moving assembly (20) pushes the axle (50) to move;
the first moving assembly (10) comprises:
a first drive lever (11);
the plurality of pressing plates (12) are respectively connected with the first driving rod (11) so as to move under the driving of the first driving rod (11), wherein the plurality of pressing plates (12) are arranged in one-to-one correspondence with the plurality of bearings on the bearing assembly so as to respectively drive the bearings to move correspondingly;
the positioning assembly comprises a positioning plate (61), the positioning plate (61) is fixed on the wheel (40), and the first driving mechanism is connected with the first driving rod (11) to drive the first driving rod (11) to move relative to the positioning plate (61);
the second movement assembly (20) comprises:
-a second driving rod (21), said second driving rod (21) being movably arranged with respect to said positioning assembly and being connected to said axle (50);
and the second driving mechanism is in driving connection with the second driving rod (21) so as to drive the axle (50) to move along the axial direction of the bearing assembly through the second driving rod (21).
2. Wheel bearing play measuring device according to claim 1, characterized in that a plurality of the pressure plates (12) comprises:
a first compression plate in abutting connection with a first end of a first bearing (131) on the bearing assembly;
and the second pressing plate is in abutting connection with a second end of a second bearing (132) on the bearing assembly, wherein the first end and the second end are symmetrically two ends along the axial direction of the bearing assembly.
3. Wheel bearing play measuring device according to claim 1, characterized in that the first drive rod (11) is a screw, wherein the screw is threaded on the positioning plate (61), the first drive mechanism comprising:
a first adjusting nut (141), the first adjusting nut (141) is arranged on the screw and is positioned at one side of the positioning plate (61);
the second adjusting nut (142) is arranged on the screw rod, wherein the first adjusting nut (141) and the second adjusting nut (142) are respectively positioned on two sides of the locating plate (61) so as to respectively drive the screw rod to move relative to the locating plate (61).
4. Wheel bearing play measuring device according to claim 1, characterized in that a spacer (70) is provided between two adjacent bearings, both ends of the spacer (70) being in abutment with the two end faces of the two bearings, respectively, opposite each other.
5. The wheel bearing play measurement device according to claim 1, characterized in that the second drive mechanism includes:
the first driving oil cylinder (221) and the second driving oil cylinder (222), wherein the first driving oil cylinder (221) and the second driving oil cylinder (222) are respectively in driving connection with the second driving rod (21) so as to respectively drive the second driving rod (21) to move.
6. The wheel bearing play measuring device according to claim 5, characterized in that the positioning assembly comprises a guide frame (62), the second moving assembly (20) further comprises a first moving plate (231) and a second moving plate (232), the first moving plate (231) and the second moving plate (232) being movably arranged on the guide frame (62) in the axial direction of the bearing assembly, respectively, the second driving rod (21) being a screw threaded on the first moving plate (231) and the second moving plate (232), respectively, wherein,
the first driving oil cylinder (221) is in driving connection with the first moving plate (231) so as to drive the second driving rod (21) to move through the first moving plate (231);
the second driving oil cylinder (222) is in driving connection with the second moving plate (232) so as to drive the second driving rod (21) to move through the second moving plate (232).
7. The wheel bearing play measuring device according to claim 6, characterized in that the first drive cylinder (221) and the second drive cylinder (222) are symmetrically arranged between the first moving plate (231) and the second moving plate (232), wherein the first drive cylinder (221) is fixed on the first moving plate (231), the second drive cylinder (222) is fixed on the second moving plate (232), a positioning stop block (24) is arranged between the first drive cylinder (221) and the second drive cylinder (222), the positioning stop block (24) is fixedly connected with the guide frame (62), and the first drive cylinder (221) and the second drive cylinder (222) are respectively connected with the positioning stop block (24).
8. Wheel bearing play measuring device according to claim 1, characterized in that the measuring assembly (30) employs a dial indicator.
9. A wheel bearing play measurement method for measuring play between a bearing assembly and a wheel (40), characterized in that the play of the bearing assembly after mounting to the wheel (40) is measured with a wheel bearing play measurement device according to any of claims 1 to 8, the wheel bearing play measurement method comprising a first measurement before assembly of a axle (50) and a second measurement after assembly of the axle (50), wherein,
the first measurement includes:
mounting a bearing assembly to a wheel (40) and applying a first preset force to the bearing assembly in an axial direction of the bearing assembly by a first movement assembly (10) until the bearing assembly stops moving;
applying a second preset force to the bearing assembly in the axial direction of the bearing assembly through the first moving assembly (10) until the bearing assembly stops moving, wherein a measuring assembly (30) measures the distance that the bearing assembly moves after the second preset force is applied, and the first preset force and the second preset force are opposite forces in the axial direction;
the second measurement includes:
applying a third predetermined force in the axial direction of the bearing assembly to the bearing assembly by a second movement assembly (20) after the axle is mounted to the wheel (40) in cooperation with the bearing assembly until the bearing assembly stops moving;
a fourth preset force in the axial direction of the bearing assembly is applied to the bearing assembly through a second moving assembly (20) until the bearing assembly stops moving, and a measuring assembly (30) measures the distance that the bearing assembly moves after the fourth preset force is applied, wherein the third preset force and the fourth preset force are forces in opposite directions in the axial direction.
10. The wheel bearing play measurement method of claim 9, wherein a rotational force is applied to the bearing assembly after the first preset force and/or the second preset force is applied to test whether the bearing assembly is rotating.
11. The wheel bearing play measurement method according to claim 9, wherein the measurement assembly (30) employs a dial gauge measurement, and the step of the measurement assembly (30) measuring the distance the first moving assembly (10) pushes the bearing assembly to move upon the first measurement includes:
fixing a dial indicator on the wheel (40) and enabling a gauge head of the dial indicator to be in contact with the end face of the bearing assembly or enabling the gauge head of the dial indicator to be in contact with the first moving assembly (10);
setting the dial indicator to zero when the first moving assembly (10) applies a first preset force to the bearing assembly in the axial direction of the bearing assembly until the bearing assembly stops moving;
and when the first moving assembly (10) applies a second preset force to the bearing assembly along the axial direction of the bearing assembly, and the bearing assembly stops moving, reading the value on the dial indicator to acquire the moving distance of the bearing assembly after the second preset force is applied.
12. The wheel bearing play measurement method according to claim 9, wherein the measurement assembly (30) employs a dial gauge measurement, and the step of the measurement assembly (30) measuring a distance by which the second movement assembly (20) pushes the bearing assembly to move at the time of the second measurement includes:
fixing the dial indicator on the axle (50) and enabling the head of the dial indicator to abut against the wheel (40);
setting the dial indicator to zero when the second movement assembly (20) applies a third preset force to the bearing assembly in the axial direction of the bearing assembly until the bearing assembly stops moving;
and reading the numerical value on the dial indicator when the second moving assembly (20) applies a fourth preset force to the bearing assembly along the axial direction of the bearing assembly until the bearing assembly stops moving so as to acquire the moving distance of the bearing assembly after the fourth preset force is applied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210441601.0A CN114754655B (en) | 2022-04-25 | 2022-04-25 | Wheel bearing play measuring device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210441601.0A CN114754655B (en) | 2022-04-25 | 2022-04-25 | Wheel bearing play measuring device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114754655A CN114754655A (en) | 2022-07-15 |
| CN114754655B true CN114754655B (en) | 2024-04-02 |
Family
ID=82332698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210441601.0A Active CN114754655B (en) | 2022-04-25 | 2022-04-25 | Wheel bearing play measuring device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114754655B (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0974254A1 (en) * | 1998-07-20 | 2000-01-26 | Maasland N.V. | A closing member for an implement for metering material |
| CN201287589Y (en) * | 2008-07-30 | 2009-08-12 | 中国北车集团大连机车研究所有限公司 | Independent wheel set for rail traffic vehicle |
| CN101825427A (en) * | 2009-03-02 | 2010-09-08 | 湖北新火炬科技股份有限公司 | Drive hub bearing unit assembly clearance measurement method |
| EP2662223A1 (en) * | 2012-05-09 | 2013-11-13 | Jtekt Corporation | Method of inspecting wheel hub unit |
| CN207113780U (en) * | 2017-06-29 | 2018-03-16 | 天津日进汽车系统有限公司 | A kind of hub bearing clearance detector |
| CN207132880U (en) * | 2017-09-08 | 2018-03-23 | 浙江辛子精工机械股份有限公司 | Bearing angle measuring device for windage |
| CN208282808U (en) * | 2018-05-29 | 2018-12-25 | 佛山市永力泰车轴有限公司 | A kind of axle unit bearing clearance detection device |
| CN209326613U (en) * | 2018-12-27 | 2019-08-30 | 宁波中亿自动化装备有限公司 | Bearing clearance measuring device |
| CN111122187A (en) * | 2018-11-01 | 2020-05-08 | 中车唐山机车车辆有限公司 | Axle bridge test tool |
| CN213985018U (en) * | 2020-12-30 | 2021-08-17 | 甘肃海林中科科技股份有限公司 | Truck hub assembly axial clearance measuring device |
| CN113624100A (en) * | 2020-05-08 | 2021-11-09 | 中车兰州机车有限公司 | Clearance measuring device |
| CN113654454A (en) * | 2021-09-13 | 2021-11-16 | 江西江铃底盘股份有限公司 | Method for measuring and controlling internal bearing clearance of hub mounting structure and application thereof |
| CN113670169A (en) * | 2021-07-30 | 2021-11-19 | 钱潮轴承有限公司 | Device and method for detecting axial clearance of wheel hub bearing unit |
-
2022
- 2022-04-25 CN CN202210441601.0A patent/CN114754655B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0974254A1 (en) * | 1998-07-20 | 2000-01-26 | Maasland N.V. | A closing member for an implement for metering material |
| CN201287589Y (en) * | 2008-07-30 | 2009-08-12 | 中国北车集团大连机车研究所有限公司 | Independent wheel set for rail traffic vehicle |
| CN101825427A (en) * | 2009-03-02 | 2010-09-08 | 湖北新火炬科技股份有限公司 | Drive hub bearing unit assembly clearance measurement method |
| EP2662223A1 (en) * | 2012-05-09 | 2013-11-13 | Jtekt Corporation | Method of inspecting wheel hub unit |
| CN207113780U (en) * | 2017-06-29 | 2018-03-16 | 天津日进汽车系统有限公司 | A kind of hub bearing clearance detector |
| CN207132880U (en) * | 2017-09-08 | 2018-03-23 | 浙江辛子精工机械股份有限公司 | Bearing angle measuring device for windage |
| CN208282808U (en) * | 2018-05-29 | 2018-12-25 | 佛山市永力泰车轴有限公司 | A kind of axle unit bearing clearance detection device |
| CN111122187A (en) * | 2018-11-01 | 2020-05-08 | 中车唐山机车车辆有限公司 | Axle bridge test tool |
| CN209326613U (en) * | 2018-12-27 | 2019-08-30 | 宁波中亿自动化装备有限公司 | Bearing clearance measuring device |
| CN113624100A (en) * | 2020-05-08 | 2021-11-09 | 中车兰州机车有限公司 | Clearance measuring device |
| CN213985018U (en) * | 2020-12-30 | 2021-08-17 | 甘肃海林中科科技股份有限公司 | Truck hub assembly axial clearance measuring device |
| CN113670169A (en) * | 2021-07-30 | 2021-11-19 | 钱潮轴承有限公司 | Device and method for detecting axial clearance of wheel hub bearing unit |
| CN113654454A (en) * | 2021-09-13 | 2021-11-16 | 江西江铃底盘股份有限公司 | Method for measuring and controlling internal bearing clearance of hub mounting structure and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114754655A (en) | 2022-07-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107907331B (en) | Wheel hub bearing rigidity testing machine | |
| CN111069875B (en) | Variable-track-pitch wheel pair assembling device and method | |
| CN109100137B (en) | NVH of rear axle reduction gear rolls off production line and detects platform | |
| CN201247036Y (en) | Apparatus for measuring railway locomotive rolling bearing axial play | |
| CN114754655B (en) | Wheel bearing play measuring device and method | |
| CN212410071U (en) | Locomotive axle-clasping box bearing transverse momentum detection auxiliary device | |
| CN110487145B (en) | Wall thickness upper and lower limit synchronous detection type axle main pin hole inner sleeve detection device | |
| CN111795893A (en) | Axle bearing load simulation detection device | |
| DE4403951A1 (en) | Wheelset tyre profile measurement method for railway vehicle | |
| CN111855064A (en) | Wheel braking torque testing arrangement | |
| CN218329808U (en) | Roundness measuring equipment is used in production of triangle riding wheel | |
| CN211234245U (en) | Bearing push-pull device | |
| CN109855891B (en) | Train axle detection centering device | |
| CN102012258A (en) | Checking device of railway vehicle wheel load instrument | |
| CN115014149A (en) | Airplane part unlocking stroke measuring device and method | |
| CN212300191U (en) | Wall thickness upper and lower limit synchronous detection type axle main pin hole inner sleeve detection mechanism | |
| CN112697006B (en) | Axle main pin hole inner sleeve detection mechanism | |
| CN110153702B (en) | Main bearing frame assembling device for engine thrust reverser | |
| CN207050994U (en) | A kind of guider of flat board brake test bench | |
| DE4330811C2 (en) | Wheelset alignment method for wheelset processing machines and wheelset alignment device | |
| CN102384734B (en) | Quick calibrating apparatus for turning disc of automobile wheel positioning instrument | |
| CN113134652B (en) | Axle box bearing comprehensive test bed repairing equipment and method thereof | |
| CN212482403U (en) | Automobile front axle length detection device | |
| CN110202354A (en) | A kind of automobile hub bearing riveting assembly special purpose machine tool | |
| CN110253382A (en) | One kind turning the pressure separation hydraulic steel ball lapping machine of guide colume type |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |