# US 8,539,842 B2 · Systems and methods for measuring bearing endplay

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- Number: US 8,539,842 B2
- Document ID: US8539842B2
- Status: Granted
- Kind: B2
- Application number: 13/750,716
- Filed: 2013-01-25
- Published: 2013-06-13
- Granted: 2013-09-24
- Earliest claimed: 2011-04-21
- Applicants: John E. Rode
- Inventors: John E. Rode
- Web page: https://patentgrep.com/patent/US8539842B2

## CPC

- G01L 5/24: for determining value of torque or twisting moment for tightening a nut or other member which is similarly stressed
- F16C 25/06: Ball or roller bearings
- F16C 41/008: {Identification means, e.g. markings, RFID-tags; Data transfer means}
- F16C 2226/60: with threaded parts, e.g. bolt and nut connections
- F16C 2229/00: Setting preload
- Y10T 29/53104: Roller or ball bearing
- Y10T 29/5383: having fluid operator
- G01L: MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE (weighing G01G)
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A system for use in measuring an end play of a wheel hub assembly includes a follower configured to extend through an opening in a cover connected to a wheel hub. The cover covers the wheel hub such that the cover inhibits access to an end of a shaft of the wheel hub assembly, and the follower is configured to contact the end through the opening. The follower is received in a holder engageable with the cover such that the follower is movable relative to the cover and the holder to allow the follower to extend from the holder to contact the end of the shaft. A frame has a cavity receiving a measurement probe extending outwardly from the cavity. The probe contacts the follower and is configured to measure movement of the follower to determine endplay of the bearing assembly on the shaft. The frame includes a plurality of legs extending from the frame to a hub mounted on the shaft and coupled to the bearing to support the frame relative to the hub.

## Claims

### Claim 1

A system for use in measuring an endplay of a bearing of a wheel hub assembly, the system comprising:
a follower configured to contact an end of a shaft of a wheel hub assembly;
said follower received in a holder such that said follower is movable relative to said holder to allow said follower to extend from said holder to contact the end of the shaft;
a frame having a measurement probe attached thereto, said probe configured to contact said follower and measure relative movement of said follower to determine an endplay of a bearing of the hub assembly on the shaft; said frame comprising a plurality of legs extending from said frame to a hub of the hub assembly mounted on said shaft and coupled to said bearing to support said frame relative to the hub; and
a handle connected to said frame, said frame, said plurality of legs and said handle sufficiently rigid to allow a user to apply a force to said handle to move the hub in an axial direction relative to the shaft until a cessation of movement of the hub relative to the shaft.

### Claim 2 (depends on 1)

The system of claim 1 wherein said frame is spaced from said follower when said follower contacts the shaft to allow said frame to move toward and away from said follower and to allow said probe to measure movement of said frame relative to said follower.

### Claim 3 (depends on 1)

The system of claim 1 further comprising a resilient member engaging said follower and said holder to bias a distal end of said follower away from said probe.

### Claim 4 (depends on 1)

The system of claim 1 further comprising a resilient member engaging said follower and said holder to bias a distal end of said follower toward the shaft.

### Claim 5 (depends on 1)

The system of claim 1 wherein said probe and said follower are axially aligned with an axis of the shaft.

### Claim 6 (depends on 1)

The system of claim 1 further comprising an opening between two legs of said plurality of legs to allow a user to insert a tool into the opening such that the tool engages a nut holding said hub assembly on the shaft when the cover is separated from the hub.

### Claim 7 (depends on 1)

The system of claim 1 wherein said plurality of legs is connectable to a plurality of wheel lugs of a wheel hub of the wheel hub assembly mounted on the shaft.

### Claim 8 (depends on 1)

The system of claim 1 wherein said handle is connected to said frame by a plurality of connecting legs, said handle located on an opposite side of said frame relative to said follower.

### Claim 9

A method for determining an endplay of a bearing of a wheel hub assembly mounted on a shaft, the method comprising;
a follower contacting an end of the shaft;
connecting an endplay measuring apparatus to a hub of the hub assembly mounted on the shaft;
connecting a measurement probe to a frame of the apparatus;
the probe contacting the follower;
applying a force to the apparatus to move the hub in a first axial direction until a cessation of movement of the hub, determining a first measurement of the probe;
applying a force to the apparatus in a second axial direction opposite to the first axial direction until a second cessation of movement of the hub;
determining a second measurement of the probe after the second cessation of movement; and
determining a movement of the follower by the probe to determine an endplay of the bearing by comparing the first measurement to the second measurement.

### Claim 10 (depends on 9)

The method of claim 9 further comprising the endplay measuring apparatus comprising a plurality of legs connecting the apparatus to the hub.

### Claim 11 (depends on 9)

The method of claim 9 further comprising receiving the follower in a holder such that the follower is movable relative to the holder to allow the follower to extend from the holder to contact the end of the shaft.

### Claim 12 (depends on 9)

The method of claim 9 further comprising turning the hub while the device is mounted to the hub to analyze roller alignment of the bearing.

### Claim 13 (depends on 9)

The method of claim 9 further comprising using a wrench to adjust a tightness of a nut holding the hub assembly by extending the wrench through an opening between two legs of a plurality of legs of the endplay measuring apparatus.

### Claim 14 (depends on 9)

The method of claim 9 further comprising a resilient member engaging the follower and the holder to bias a distal end of the follower away from the probe.

### Claim 15 (depends on 9)

The method of claim 9 further comprising a resilient member engaging the follower and the holder to bias a distal end of the follower toward the shaft.

### Claim 16 (depends on 9)

The method of claim 9 further comprising a spring engaging the follower and the holder to bias a distal end of the follower toward the shaft.

### Claim 17

A system for use in measuring an endplay of a bearing of a wheel hub assembly, the system comprising:
a follower configured to contact an end of a shaft of a wheel hub assembly;
said follower received in a holder such that said follower is movable relative to said holder to allow said follower to extend from said holder to contact the end of the shaft;
a frame having a measurement probe attached thereto, said probe configured to contact said follower and measure relative movement of said follower to determine an endplay of a bearing of the hub assembly on the shaft;
said frame extending to a hub of the hub assembly mounted on said shaft and coupled to said bearing to support said frame relative to the hub; and
wherein said frame is spaced from said follower when said follower contacts the shaft to allow said frame to move toward and away from said follower and to allow said probe to measure movement of said frame relative to said follower.

### Claim 18 (depends on 17)

The system of claim 17 wherein said frame comprises a plurality of legs extending to the hub.

### Claim 19

A system for use in measuring an endplay of a bearing of a wheel hub assembly, the system comprising:
a follower configured to contact an end of a shaft of a wheel hub assembly;
said follower received in a holder such that said follower is movable relative to said holder to allow said follower to extend from said holder to contact the end of the shaft;
a frame having a measurement probe attached thereto, said probe configured to contact said follower and measure relative movement of said follower to determine an endplay of a bearing of the hub assembly on the shaft; said frame extending to a hub of the hub assembly mounted on said shaft and coupled to said bearing to support said frame relative to the hub; and
a handle connected to said frame, said handle extending substantially perpendicularly relative to an axis of the shaft and extending to opposite sides of the axis, said handle connected to said frame by a plurality of connecting legs, said handle located on an opposite side of said frame relative to said follower.

### Claim 20 (depends on 19)

The system of claim 19 wherein said frame comprises a plurality of legs extending to the hub.

### Claim 21

A method for determining an endplay of a bearing of a wheel hub assembly mounted on a shaft, the method comprising;
a follower contacting an end of a shaft of a wheel hub assembly;
connecting an endplay measuring apparatus to a hub of a hub assembly mounted on the shaft;
connecting a measurement probe to a portion of the apparatus;
the probe contacting the follower;
the apparatus moving the hub in a first axial direction until a cessation of movement of the hub, determining a first measurement of the probe;
the apparatus moving in a second axial direction opposite to the first axial direction until a second cessation of movement of the hub;
determining a second measurement of the probe after the second cessation of movement; and
determining a movement of the follower by the probe to determine an endplay of the bearing by comparing the first measurement to the second measurement.

### Claim 22

A system for use in measuring an endplay of a bearing of a wheel hub assembly, the system comprising:
a follower configured to contact an end of a shaft of a wheel hub assembly;
said follower movable relative to a supporting structure to allow said follower to contact the end of the shaft;
a measurement probe attached to said supporting structure, said probe configured to contact said follower and measure relative movement of said follower to determine an endplay of a bearing of the hub assembly on the shaft;
said supporting structure configured to connect to a hub of the hub assembly mounted on said shaft and coupled to said bearing; and
said supporting structure spaced from said follower when said follower contacts the shaft to allow said supporting structure to move toward and away from said follower and to allow said probe to measure movement of said supporting structure relative to said follower.

### Claim 23 (depends on 22)

The system of claim 22 wherein said structure is connected to the hub.

### Claim 24 (depends on 22)

The system of claim 22 wherein said structure comprises a plurality of legs connecting said structure to the hub.