CN112536743A - Clamping device for testing starting torque of joint bearing - Google Patents
Clamping device for testing starting torque of joint bearing Download PDFInfo
- Publication number
- CN112536743A CN112536743A CN202011326570.1A CN202011326570A CN112536743A CN 112536743 A CN112536743 A CN 112536743A CN 202011326570 A CN202011326570 A CN 202011326570A CN 112536743 A CN112536743 A CN 112536743A
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- China
- Prior art keywords
- bearing
- starting torque
- testing tool
- face
- outer ring
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- 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.)
- Pending
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- 238000012360 testing method Methods 0.000 title claims abstract description 61
- 230000006835 compression Effects 0.000 claims abstract description 15
- 238000007906 compression Methods 0.000 claims abstract description 15
- 230000000149 penetrating effect Effects 0.000 claims abstract description 5
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 claims 1
- 238000009434 installation Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0009—Force sensors associated with a bearing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
- G01L5/0061—Force sensors associated with industrial machines or actuators
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention provides a clamping device for testing the starting torque of a joint bearing, which comprises: the device comprises a supporting seat (1), a compression bolt (2), a gasket (3), a starting torque testing tool (4) and a bearing (5); the starting torque testing tool (4) is in a three-layer step column shape, the bearing (5) is sleeved at the middle-layer step of the starting torque testing tool (4), the bottom-layer step of the starting torque testing tool (4) is in threaded connection with a nut, and the end face of the nut, facing the bearing (5), is in contact with the end face of the inner ring of the bearing (5); the top end of the starting torque test tool (4) is connected with a torque wrench; the starting torque testing tool (4) is arranged in a step inner hole of the supporting seat (1) in a penetrating mode, and the lower end face of the outer ring of the bearing (5) is arranged at the step of the step inner hole; the upper end face of the outer ring of the bearing (5) is fixed on the supporting seat (1) through the compression bolt (2) and the gasket (3). The problem of bearing atress warp and lead to the test data inaccurate is solved.
Description
Technical Field
The invention relates to a clamping device, in particular to a clamping device for testing the starting torque of a joint bearing.
Background
A large number of joint type structural components exist in the field of mechanical assembly, various joint bearings are used in the components, and starting torque testing is needed after most of the joint bearings are installed.
In order to ensure that the starting torque of the bearing is qualified after installation, the no-load starting torque before the bearing is generally required to be tested before installation, but when the bearing is manually held or clamped by clamping devices such as a vice and the like, the starting torque is influenced by clamping force, and test data is unstable and unreal.
Disclosure of Invention
The invention provides a clamping device for testing the starting torque of a joint bearing, which solves the problem that the test data is unstable and unreal when the existing clamping device such as a vice is used for clamping the bearing by manually holding the bearing.
The invention provides a clamping device for testing the starting torque of a joint bearing, which comprises: the device comprises a supporting seat 1, a compression bolt 2, a gasket 3, a starting torque testing tool 4 and a bearing 5; wherein,
the starting torque testing tool 4 is in a three-layer step column shape, the bearing 5 is sleeved at the middle step of the starting torque testing tool 4, a nut is connected to the bottom step of the starting torque testing tool 4 in a threaded mode, and the end face, facing the bearing 5, of the nut is in contact with the end face of the inner ring of the bearing 5; the top end of the starting torque testing tool 4 is connected with a torque wrench;
the starting torque testing tool 4 is arranged in a step inner hole of the supporting seat 1 in a penetrating mode, and the lower end face of the outer ring of the bearing 5 is arranged at a step of the step inner hole; the upper end face of the outer ring of the bearing 5 is fixed on the supporting seat 1 through a compression bolt 2 and a gasket 3.
Optionally, the width of the contact surface of the gasket 3 and the upper end surface of the outer ring of the bearing 5 is not more than 0.1 mm.
Optionally, the upper end surface of the outer ring of the bearing 5 is fixed on the support seat 1 through three groups of compression bolts 2 and gaskets 3;
three groups of compression bolts 2 and gaskets 3 are arranged circumferentially symmetrically.
Optionally, the tightening force of the pressing bolt 2 is smaller than the preset tightening force 1 ± 0.1 n.m.
Optionally, a hexagonal groove is formed in the upper end of the starting torque testing tool 4, and the torque wrench is inserted into the hexagonal groove.
Optionally, the inner ring of the bearing 5, the starting torque testing tool 4, the outer ring of the bearing 5 and the supporting seat 1 are in clearance fit, and the clearance range is 0.01-0.025 mm.
Optionally, the material of the support seat 1 is a soft metal aluminum alloy.
The invention provides a clamping device for testing the starting torque of a joint bearing, which comprises: the device comprises a supporting seat 1, a compression bolt 2, a gasket 3 and a starting torque testing tool 4; the starting torque testing tool 4 is in a three-layer step column shape, the bearing 5 is sleeved at the middle step of the starting torque testing tool 4, a nut is connected to the bottom step of the starting torque testing tool 4 in a threaded mode, and the end face, facing the bearing 5, of the nut is in contact with the end face of the inner ring of the bearing 5; the top end of the starting torque testing tool 4 is connected with a torque wrench; the starting torque testing tool 4 is arranged in a step inner hole of the supporting seat 1 in a penetrating mode, and the lower end face of the outer ring of the bearing 5 is arranged at a step of the step inner hole; the upper end face of the outer ring of the bearing 5 is fixed on the supporting seat 1 through a compression bolt 2 and a gasket 3. The gasket 3 is pressed through the compression bolt 2, the edge of the gasket 3 is hung on the outer ring of the bearing to fix the bearing, the device ensures that the deformation of the bearing is minimum by a fixing mode of the outer ring of the bearing, and the deformation of the bearing is minimum by a clamping mode of the inner ring of the bearing. The problem of bearing atress warp and lead to test data inaccurate is solved, reduce the subassembly rate of doing over again, improved machining efficiency.
Drawings
FIG. 1 is a cross-sectional view of a clamping device for testing the starting torque of a joint bearing provided by the invention;
FIG. 2 is a right side view of the clamping device for testing the start torque of the oscillating bearing provided by the invention;
FIG. 3 is an isometric view of a clamping device for a test of the start torque of a spherical plain bearing provided by the invention;
description of reference numerals:
1-supporting seat, 2-hold-down bolt, 3-gasket, 4-starting torque test tool and 5-bearing.
Detailed Description
The clamping device for testing the starting torque of the oscillating bearing provided by the invention is explained below with reference to the attached drawings.
Referring to fig. 1-3, the invention provides a clamping device for a joint bearing starting torque test, comprising: the device comprises a supporting seat 1, a compression bolt 2, a gasket 3, a starting torque testing tool 4 and a bearing 5.
The middle of the supporting seat 1 is provided with three layers of stepped holes, the size of an inner hole of a first layer is determined according to the measured bearing 5, the inner hole and the bearing are in clearance fit, the clearance range is 0.01-0.025mm, the size of the inner hole of a second layer is required to be smaller than the outer diameter of the bearing and larger than the outer diameter of a nut screwed at the lower end of the starting torque testing tool 4, the size of the inner hole of a third layer is the same as that of the inner hole of the bearing, and the inner hole is required to be a through hole so that the bearing 5 can be tested with the supporting.
In order to avoid stress concentration to cause the first layer of inner holes of the supporting seat 1 will the bearing outer ring of the bearing 5 is scratched, the supporting seat 1 is made of a soft metal aluminum alloy.
When the bearing 5 is placed in the inner hole of the first layer of the supporting seat 1, the upper end surface of the bearing 5 is 0.1mm higher than the upper end surface of the supporting seat 1 so as to ensure that the edge of the gasket 3 is tightly pressed on the bearing outer ring of the bearing 5.
The use steps of the clamping device for the test of the starting torque of the oscillating bearing provided by the invention comprise:
s1, trial assembling the bearing 5 and the supporting seat 1 by using a guide core rod;
s2, taking out the bearing 5, sleeving the bearing 5 at the middle step of the starting torque test tool 4, and screwing down a connecting nut at the bottom step of the starting torque test tool 4;
s3, the starting torque testing tool 4 is arranged in the step inner hole of the supporting seat 1 in a penetrating mode, and the lower end face of the outer ring of the bearing 5 is arranged at the step of the step inner hole
S4, installing the compression bolt 2 and the gasket 3 into the threaded hole on the upper end face of the support seat 1, and requiring the outer end face of the gasket 3 and the outer ring of the bearing 5 to be compressed, wherein the compression width is not more than 0.1mm, and the compression force is not more than 1 +/-0.1 N.m;
s5, inserting a torque wrench into the hexagonal groove at the upper end of the starting torque testing tool 4, and reading an indicated value on the torque wrench when the starting torque testing tool 4 starts to rotate by rotating the torque wrench, wherein the indicated value is the bearing unloaded rotation starting torque.
The clamping device for testing the start torque of the oscillating bearing is simple in structure, easy to manufacture and convenient to operate, when the inner ring of the bearing rotates around an axis in the bearing no-load start torque test requirement HB 20328, the test device should enable the outer ring of the bearing to be fixed, the fixing mode of the test device to the outer ring of the bearing should enable the deformation of the bearing to be minimum, the clamping mode of the test device to the inner ring of the bearing should enable the deformation of the bearing to be minimum, the problem that test data are inaccurate due to stress deformation of the bearing is solved, the rework rate of components is reduced, and the processing efficiency is improved.
Claims (8)
1. The utility model provides a clamping device of joint bearing starting torque test which characterized in that includes: the device comprises a supporting seat (1), a compression bolt (2), a gasket (3), a starting torque testing tool (4) and a bearing (5); wherein,
the starting torque testing tool (4) is in a three-layer step column shape, the bearing (5) is sleeved at the middle-layer step of the starting torque testing tool (4), a nut is connected to the bottom-layer step of the starting torque testing tool (4) in a threaded mode, and the end face, facing the bearing (5), of the nut is in contact with the end face of the inner ring of the bearing (5); the top end of the starting torque testing tool (4) is connected with a torque wrench;
the starting torque testing tool (4) is arranged in a step inner hole of the supporting seat (1) in a penetrating mode, and the lower end face of the outer ring of the bearing (5) is arranged at a step of the step inner hole; the upper end face of the outer ring of the bearing (5) is fixed on the supporting seat (1) through a compression bolt (2) and a gasket (3).
2. The device according to claim 1, characterized in that the width of the contact surface of the spacer (3) with the upper end face of the outer ring of the bearing (5) is not more than 0.1 mm.
3. The device according to claim 1, characterized in that the upper end face of the outer ring of the bearing (5) is fixed to the support base (1) by three sets of hold-down bolts (2) and washers (3).
4. A device according to claim 3, characterized in that three sets of hold-down bolts (2) and washers (3) are arranged circumferentially symmetrically.
5. The device according to claim 1, characterized in that the tightening force of the pressure bolt (2) is smaller than a preset tightening force.
6. Device according to claim 1, characterized in that the upper end of the start-up torque test tool (4) is provided with a hexagonal recess in which the torque wrench is inserted.
7. The device according to claim 1, characterized in that the inner ring of the bearing (5) and the start-up torque test fixture (4), and the outer ring of the bearing (5) and the support base (1) are in clearance fit, with a clearance in the range of 0.01-0.025 mm.
8. Device according to claim 1, characterized in that the material of the support seat (1) is a soft metal aluminium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011326570.1A CN112536743A (en) | 2020-11-20 | 2020-11-20 | Clamping device for testing starting torque of joint bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011326570.1A CN112536743A (en) | 2020-11-20 | 2020-11-20 | Clamping device for testing starting torque of joint bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112536743A true CN112536743A (en) | 2021-03-23 |
Family
ID=75014740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011326570.1A Pending CN112536743A (en) | 2020-11-20 | 2020-11-20 | Clamping device for testing starting torque of joint bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112536743A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113700751A (en) * | 2021-06-11 | 2021-11-26 | 江西昌河航空工业有限公司 | Locking device and method for swivel joint bearing |
| CN114295373A (en) * | 2021-12-10 | 2022-04-08 | 昌河飞机工业（集团）有限责任公司 | Simple and universal bearing starting torque measuring device and measuring method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6488131A (en) * | 1987-09-29 | 1989-04-03 | Toshiba Corp | Friction torque measuring instrument for rolling bearing |
| CN104236772A (en) * | 2014-08-26 | 2014-12-24 | 中国直升机设计研究所 | Knuckle bearing starting torque measurement device and measurement method |
| CN206019888U (en) * | 2016-09-14 | 2017-03-15 | 航天精工股份有限公司 | A kind of self-lubricating knuckle bearing no-load starting torque measuring device |
| CN210293505U (en) * | 2019-08-20 | 2020-04-10 | 人本集团有限公司 | Clutch bearing starting torque detection device |
| CN210689887U (en) * | 2019-09-19 | 2020-06-05 | 浙江辛子精工机械有限公司 | Measuring device for plastic-coated slip moment of bearing outer ring of tension pulley |
-
2020
- 2020-11-20 CN CN202011326570.1A patent/CN112536743A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6488131A (en) * | 1987-09-29 | 1989-04-03 | Toshiba Corp | Friction torque measuring instrument for rolling bearing |
| CN104236772A (en) * | 2014-08-26 | 2014-12-24 | 中国直升机设计研究所 | Knuckle bearing starting torque measurement device and measurement method |
| CN206019888U (en) * | 2016-09-14 | 2017-03-15 | 航天精工股份有限公司 | A kind of self-lubricating knuckle bearing no-load starting torque measuring device |
| CN210293505U (en) * | 2019-08-20 | 2020-04-10 | 人本集团有限公司 | Clutch bearing starting torque detection device |
| CN210689887U (en) * | 2019-09-19 | 2020-06-05 | 浙江辛子精工机械有限公司 | Measuring device for plastic-coated slip moment of bearing outer ring of tension pulley |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113700751A (en) * | 2021-06-11 | 2021-11-26 | 江西昌河航空工业有限公司 | Locking device and method for swivel joint bearing |
| CN113700751B (en) * | 2021-06-11 | 2023-01-06 | 江西昌河航空工业有限公司 | Locking device and method for swivel joint bearing |
| CN114295373A (en) * | 2021-12-10 | 2022-04-08 | 昌河飞机工业（集团）有限责任公司 | Simple and universal bearing starting torque measuring device and measuring method |
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Application publication date: 20210323 |