CN113959718B - Universal joint bearing strength test universal test device and method - Google Patents
Universal joint bearing strength test universal test device and method Download PDFInfo
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- CN113959718B CN113959718B CN202111257458.1A CN202111257458A CN113959718B CN 113959718 B CN113959718 B CN 113959718B CN 202111257458 A CN202111257458 A CN 202111257458A CN 113959718 B CN113959718 B CN 113959718B
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- 238000012360 testing method Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims description 7
- 238000004458 analytical method Methods 0.000 claims abstract description 12
- 238000010998 test method Methods 0.000 claims abstract description 4
- 238000003825 pressing Methods 0.000 claims description 19
- 238000003556 assay Methods 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 4
- 238000007726 management method Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012827 research and development Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
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- 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)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a universal joint bearing strength test universal test device and a universal joint bearing strength test method, which relate to the field of universal joint bearings and comprise a universal joint assembly and the like, wherein the universal joint assembly comprises a cross shaft and universal joint bearings sleeved on four shaft heads of the cross shaft; the bearing strength testing machine comprises a rack, wherein a hydraulic press is arranged at the upper part of the rack, and a press head clamping base is fixed on the hydraulic press and is used for fixedly clamping a variable-diameter press head; the variable-diameter pressure head is driven by the hydraulic machine to lift, and the variable-diameter pressure head adapts to universal joint bearings with different inner diameters by selectively adjusting the outer diameter; the bearing clamping base is arranged under the variable-diameter pressure head and used for fixedly clamping a universal joint bearing to be tested, the sensor is arranged on the bearing clamping base and is electrically connected with the control end and the analysis platform and used for transmitting experimental data of the universal joint bearing. The universal joint bearing strength test device solves the defect that the fixture of the universal joint bearing strength test device is not universal, and the universality of the test fixture is realized through the variable-diameter pressure head.
Description
Technical Field
The invention relates to the field of universal joint bearings, in particular to a universal joint bearing strength test universal test device and method.
Background
In the prior art, when the strength test of the universal joint bearing is carried out, pressure is applied to the bottom of the bearing through a pressure tester, and test data are recorded according to the state of the bearing. The clamping pressure head and the base for the test are required to be matched with the sizes of the bearings and the cross shaft for the test. The pressing heads with different specifications are required to be customized for the bearings with different sizes, namely, the diameters of the pressing heads are determined by the inner diameters of the bearings, and the bearings with different inner diameters are required to be provided with the pressing heads with different sizes, so that the manufacturing cost and the management difficulty of the test fixture are increased, the product detection period is prolonged, and the universality of the fixture is not facilitated.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a universal joint bearing strength test universal test device and method, which improve the universality of a bearing strength test fixture, reduce the design and management cost of the test device, reduce the test required time and accelerate the product verification test period.
The invention aims at being completed by the following technical scheme: the universal joint bearing strength testing universal test device comprises a universal joint assembly, a variable diameter pressure head, a control end, an analysis platform and a bearing strength tester, wherein the universal joint assembly comprises a cross shaft and universal joint bearings sleeved on four shaft heads of the cross shaft; the bearing strength testing machine comprises a rack, wherein a hydraulic machine is arranged on the upper part of the rack, and a pressure head clamping base is fixed on the hydraulic machine and is used for fixedly clamping the variable-diameter pressure head; the variable-diameter pressure head is driven by the hydraulic machine to lift, and the variable-diameter pressure head adapts to universal joint bearings with different inner diameters by selectively adjusting the outer diameter; the bearing clamping base is arranged under the variable-diameter pressure head and used for fixedly clamping a universal joint bearing to be tested, the sensor is arranged on the bearing clamping base and electrically connected with the control end and the analysis platform and used for transmitting experimental data of the universal joint bearing.
As a further technical scheme, the variable-diameter pressure head comprises an adjusting bolt, a mounting sleeve, a pressure head base and a petal-shaped pressure head, wherein the mounting sleeve is sleeved on the periphery of the pressure head base, the three petal-shaped pressure head is movably connected to the periphery of the pressure head base, and taper holes are formed between the three petal-shaped pressure heads; the adjusting bolt is fixed with the mounting sleeve, the rod part of the adjusting bolt faces upwards and the head part of the adjusting bolt faces downwards and sequentially penetrates through the petal-shaped pressure head, the pressure head base and the mounting sleeve, the head part of the adjusting bolt is propped against the inner wall of the taper hole, and the adjusting bolt controls the three-petal-shaped pressure head to open or close through lifting.
As a further technical scheme, the outer wall of the mounting sleeve is provided with a pressure head mounting hole for fixing the variable-diameter pressure head with the hydraulic machine by matching with a pressure head clamping base.
As a further technical scheme, a plurality of pressure head positioning holes are formed in the outer wall of the mounting sleeve.
As a further technical scheme, the pressing head base is connected with the petal-shaped pressing head connecting end at the top of the petal-shaped pressing head through a double-head screw rod, so that the petal-shaped pressing head rotates around the petal-shaped pressing head connecting end.
As a further technical solution, the contact end of the petal-shaped indenter located at the bottom of the petal-shaped indenter is used for contacting the universal joint bearing to apply pressure.
As a further technical scheme, the bearing clamping base is arranged on a test bed under the variable-diameter pressure head.
The test method adopting the device comprises the following steps:
1) Clamping a universal joint bearing to be tested at a bearing clamping base in a bearing strength testing machine;
2) Adjusting the variable-diameter pressure head to the matched size according to the size of the universal joint bearing, and then adjusting a pressure head positioning hole to enable the variable-diameter pressure head to be stable;
3) Assembling the pressure head mounting hole with the pressure head clamping base;
4) Starting a bearing strength testing machine, applying pressure to the universal joint bearing by a hydraulic machine, and reading experimental data through a control end and an analysis platform.
As a further technical scheme, in the step 2), the adjusting bolt is rotated upwards to enable the three-petal-shaped pressure head to be opened so as to enlarge the outer diameter of the contact end of the petal-shaped pressure head; and the adjusting bolt is rotated downwards, so that the three-petal-shaped pressure heads are folded, and the outer diameter of the contact end of the petal-shaped pressure heads is reduced.
The beneficial effects of the invention are as follows: the invention solves the defect that the fixture of the universal joint bearing strength test device is not universal, and the variable-diameter pressure head designed by the invention is matched with the using method to realize the universality of the test fixture. Compared with a special pressure head, the universal variable-diameter pressure head reduces the design, manufacturing and management cost management of the test device, facilitates test operation, accelerates test period of testing bearings with different sizes, and further improves product research and development efficiency.
Drawings
FIG. 1 is a schematic structural view of a gimbal assembly.
Fig. 2 is a schematic structural view of a joint bearing.
Fig. 3 is a schematic diagram of a variable diameter ram.
Fig. 4 is a half cross-sectional view of a variable diameter ram.
Fig. 5 is a schematic diagram of the connection structure of the ram base and the petal ram.
FIG. 6 is a schematic diagram of the connection structure between the control end and the analysis platform and the bearing strength tester.
FIG. 7 is a schematic view of a variable diameter ram and smaller diameter joint bearing mounting configuration.
FIG. 8 is a schematic view of a variable diameter ram and larger diameter joint bearing mounting configuration.
Reference numerals illustrate: the universal joint assembly 1, a cross shaft 11, a universal joint bearing 12, a universal joint outer ring 121, a plurality of needle rollers 122, an oil seal 123, a variable diameter pressure head 2, an adjusting bolt 21, a mounting sleeve 22, a pressure head mounting hole 221, a pressure head positioning hole 222, a pressure head base 23, a double-head screw 231, a petal-shaped pressure head 24, a petal-shaped pressure head contact end 241, a petal-shaped pressure head connecting end 242, a taper hole 25, a control end and an analysis platform 3, a bearing strength tester 4, a hydraulic machine 41, a bearing clamping base 42, a pressure head clamping base 43, a rack 44 and a test bench 45.
Detailed Description
The invention will be described in detail below with reference to the attached drawings:
Examples: as shown in figures 1-8, the universal joint bearing strength testing universal test device comprises a universal joint assembly 1, a variable-diameter pressure head 2, a control end, an analysis platform 3 and a bearing strength tester 4. Referring to fig. 1, the universal joint assembly 1 includes a cross 11 and universal joint bearings 12 fitted around four axes of the cross 11. As shown in fig. 2, the joint bearing 12 includes a joint outer ring 121, a plurality of needle rollers 122, and an oil seal 123 provided at the mouth of the joint outer ring 121. As shown in fig. 6, the bearing strength tester 4 comprises a rack 44, wherein a hydraulic press 41 is installed at the upper part of the rack 44, and a press head clamping base 43 is fixed on the hydraulic press 41 and is used for fixedly clamping the variable-diameter press head 2; the variable-diameter pressure head 2 is driven to lift by a hydraulic machine 41, and the variable-diameter pressure head 2 is adapted to the universal joint bearings 12 with different inner diameters through selectively adjusting the outer diameter. Further, as shown in fig. 3, 4 and 5, the variable diameter press head 2 comprises an adjusting bolt 21, a mounting sleeve 22, a press head base 23 and a petal-shaped press head 24, wherein the mounting sleeve 22 is sleeved on the periphery of the press head base 23, the three petal-shaped press head 24 is movably connected on the periphery of the press head base 23, and a taper hole 25 is arranged between the three petal-shaped press heads 24; the adjusting bolt 21 is fixed with the mounting sleeve 22, the rod part of the adjusting bolt 21 faces upwards and the head part of the adjusting bolt faces downwards, and sequentially penetrates through the petal-shaped pressure head 24, the pressure head base 23 and the mounting sleeve 22, the head part of the adjusting bolt 21 is propped against the inner wall of the taper hole 25, and the adjusting bolt 21 is controlled to open or close by lifting the three-petal-shaped pressure head 24. The outer wall of the mounting sleeve 22 is provided with a pressure head mounting hole 221 for fixing the diameter-variable pressure head 2 with the hydraulic machine 41 by matching with a pressure head clamping base 43. The outer wall of the mounting sleeve 22 is provided with a plurality of pressure head positioning holes 222 for positioning the petal-shaped pressure head 24 so as to stabilize the pressure head. The ram base 23 is connected to the petal ram connecting end 242 at the top of the petal ram 24 by a double-headed screw 231, so that the petal ram 24 rotates around the petal ram connecting end 242. A lobe ram contact end 241 at the bottom of the lobe ram 24 is used to contact the joint bearing 12 to apply pressure.
As shown in fig. 6, the bearing clamping base 42 is disposed on a test stand 45 directly below the variable diameter ram 2 for fixedly clamping the universal joint bearing 12 to be tested. A sensor is arranged on the bearing clamping base 42, and is electrically connected with the control end and the analysis platform 3, and is used for transmitting experimental data of the universal joint bearing 12.
The test method adopting the device comprises the following steps:
1) Clamping the universal joint bearing 12 to be tested at a bearing clamping base 42 in the bearing strength testing machine 4;
2) As shown in fig. 8, for the large-diameter universal joint bearing 12 (diameter D2), the adjusting bolt 21 is rotated upward, and due to the existence of the taper hole 25, the adjusting bolt 21 pushes the flap head 24, and the flap head contact end 241 is rotated around the double-headed screw 231, so that the three-flap head 24 is opened to expand the outer diameter of the flap head contact end 241; the lobe-shaped ram contact end 241 abuts the needle 122 of the universal joint bearing 12, at which point the head of the adjusting bolt 21 is at a height H2. As shown in fig. 7, for the smaller-diameter universal joint bearing 12 (diameter D1, D1< D2), the adjusting bolt 21 is turned downward, the tapered hole 25 is turned around the double-headed screw 231 by the action of gravity, and the three-lobe-shaped pressing head 24 is folded to reduce the outer diameter of the lobe-shaped pressing head contact end 241; the lobe head contact end 241 abuts the needle 122 of the universal joint bearing 12, and the height of the head of the adjusting bolt 21 is H1 (H1 < H2). After the variable-diameter pressure head 2 is adjusted to the matched size according to the size of the universal joint bearing 12, the pressure head positioning hole 222 is adjusted to enable the variable-diameter pressure head 2 to be stable;
3) The pressure head mounting hole 221 is assembled with the pressure head clamping base 43, so that the variable-diameter pressure head 2 is fixed with the hydraulic machine 41;
4) The bearing strength tester 4 is started, the hydraulic machine 41 gradually moves downwards to apply pressure to the universal joint bearing 12, and experimental data are read through the control end and the analysis platform 3.
The invention innovatively solves the defect that the fixture of the universal joint bearing strength test device is not universal, and the universality of the test fixture is realized by the variable-diameter pressure head designed by the invention and the using method. Compared with a special pressure head, the universal variable-diameter pressure head reduces the design, manufacturing and management cost management of the test device, facilitates test operation, accelerates test period of testing bearings with different sizes, and further improves product research and development efficiency.
It should be understood that equivalents and modifications to the technical scheme and the inventive concept of the present invention should fall within the scope of the claims appended hereto.
Claims (7)
1. Universal joint bearing strength test universal test device, its characterized in that: the universal joint comprises a universal joint assembly (1), a variable-diameter pressure head (2), a control end and analysis platform (3) and a bearing strength testing machine (4), wherein the universal joint assembly (1) comprises a cross shaft (11) and universal joint bearings (12) sleeved on four shaft heads of the cross shaft (11); the bearing strength testing machine (4) comprises a bench (44), wherein a hydraulic machine (41) is arranged on the upper part of the bench (44), and a pressure head clamping base (43) is fixed on the hydraulic machine (41) and is used for fixedly clamping the variable-diameter pressure head (2); the variable-diameter pressure head (2) is driven to lift by a hydraulic machine (41), and the variable-diameter pressure head (2) adapts to universal joint bearings (12) with different inner diameters by selectively adjusting the outer diameter; the bearing clamping base (42) is arranged right below the variable-diameter pressure head (2) and used for fixedly clamping the universal joint bearing (12) to be tested, the sensor is arranged on the bearing clamping base (42) and is electrically connected with the control end and the analysis platform (3) and used for transmitting experimental data of the universal joint bearing (12); the variable-diameter pressure head (2) comprises an adjusting bolt (21), a mounting sleeve (22), a pressure head base (23) and a petal-shaped pressure head (24), wherein the mounting sleeve (22) is sleeved on the periphery of the pressure head base (23), the three petal-shaped pressure heads (24) are movably connected to two sides of the pressure head base (23), and taper holes (25) are formed between the three petal-shaped pressure heads (24); the adjusting bolt (21) is fixed with the mounting sleeve (22), the rod part of the adjusting bolt (21) faces upwards and the head part of the adjusting bolt faces downwards and sequentially penetrates through the petal-shaped pressure head (24), the pressure head base (23) and the mounting sleeve (22), the head part of the adjusting bolt (21) is propped against the inner wall of the taper hole (25), and the adjusting bolt (21) is controlled to open or close by lifting the three petal-shaped pressure head (24); the bearing clamping base (42) is arranged on a test bed (45) right below the variable-diameter pressure head (2).
2. The universal joint bearing strength test universal test unit according to claim 1, wherein: the outer wall of the mounting sleeve (22) is provided with a pressure head mounting hole (221) for fixing the variable-diameter pressure head (2) with the hydraulic machine (41) by matching with a pressure head clamping base (43).
3. The universal joint bearing strength test universal test unit according to claim 1, wherein: the outer wall of the mounting sleeve (22) is provided with a plurality of pressure head positioning holes (222).
4. The universal joint bearing strength test universal test unit according to claim 1, wherein: the pressing head base (23) is connected with a petal-shaped pressing head connecting end (242) at the top of the petal-shaped pressing head (24) through a double-head screw rod (231), so that the petal-shaped pressing head (24) rotates around the petal-shaped pressing head connecting end (242).
5. The universal joint bearing strength test universal test unit according to claim 1, wherein: a lobe ram contact end (241) at the bottom of the lobe ram (24) is used to contact the joint bearing (12) to apply pressure.
6. A test method using the universal test device for testing the strength of a universal joint bearing according to any one of claims 1 to 5, characterized in that: the method comprises the following steps:
1) Clamping a universal joint bearing (12) to be tested at a bearing clamping base (42) in a bearing strength testing machine (4);
2) After the variable-diameter pressure head (2) is adjusted to the matched size according to the size of the universal joint bearing (12), the pressure head positioning hole (222) is adjusted, so that the variable-diameter pressure head (2) is stable;
3) Assembling the pressure head mounting hole (221) with the pressure head clamping base (43);
4) And starting the bearing strength testing machine (4), applying pressure to the universal joint bearing (12) by the hydraulic machine (41), and reading experimental data through the control end and the analysis platform (3).
7. The assay method of claim 6, wherein: in the step 2), the adjusting bolt (21) is rotated upwards to open the three-petal-shaped pressure head (24) so as to enlarge the outer diameter of the contact end (241) of the petal-shaped pressure head; the adjusting bolt (21) is rotated downwards to fold the three-petal-shaped pressing head (24) so as to reduce the outer diameter of the contact end (241) of the petal-shaped pressing head.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111257458.1A CN113959718B (en) | 2021-10-27 | 2021-10-27 | Universal joint bearing strength test universal test device and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111257458.1A CN113959718B (en) | 2021-10-27 | 2021-10-27 | Universal joint bearing strength test universal test device and method |
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| Publication Number | Publication Date |
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| CN113959718A CN113959718A (en) | 2022-01-21 |
| CN113959718B true CN113959718B (en) | 2024-06-11 |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3060720A (en) * | 1959-09-08 | 1962-10-30 | Glacier Co Ltd | Machine for testing bearing for fatigue strength |
| US6367321B1 (en) * | 1999-02-01 | 2002-04-09 | Ngk Insulators, Ltd. | Test method on the strength of ceramic engine-valves and testing device for the same |
| JP2002235768A (en) * | 2001-02-13 | 2002-08-23 | Unisia Jecs Corp | Slide type constant velocity joint |
| KR100793694B1 (en) * | 2006-12-29 | 2008-01-11 | 한국프랜지공업 주식회사 | Apparatus testing strenth of knuckle for vehicle |
| CN103335027A (en) * | 2013-07-17 | 2013-10-02 | 烟台开发区蓝鲸金属修复有限公司 | Universal joint pin cross bag universal joint coupler and repairing method thereof |
| KR20140013316A (en) * | 2012-07-23 | 2014-02-05 | 주식회사 일진글로벌 | Wheel bearing, constant velocity joint and jointing structure for wheel bearing and constant velocity joint |
| CN213632955U (en) * | 2020-10-19 | 2021-07-06 | 洛阳西电电力设备有限公司 | Mechanical structure of copper pipe tensile strength test equipment |
| CN213658253U (en) * | 2020-12-04 | 2021-07-09 | 万向钱潮股份有限公司 | Testing device for radial bearing capacity of three-ball pin bearing |
| CN216349567U (en) * | 2021-10-27 | 2022-04-19 | 万向钱潮股份有限公司 | Universal test device for universal joint bearing strength test |
-
2021
- 2021-10-27 CN CN202111257458.1A patent/CN113959718B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3060720A (en) * | 1959-09-08 | 1962-10-30 | Glacier Co Ltd | Machine for testing bearing for fatigue strength |
| US6367321B1 (en) * | 1999-02-01 | 2002-04-09 | Ngk Insulators, Ltd. | Test method on the strength of ceramic engine-valves and testing device for the same |
| JP2002235768A (en) * | 2001-02-13 | 2002-08-23 | Unisia Jecs Corp | Slide type constant velocity joint |
| KR100793694B1 (en) * | 2006-12-29 | 2008-01-11 | 한국프랜지공업 주식회사 | Apparatus testing strenth of knuckle for vehicle |
| KR20140013316A (en) * | 2012-07-23 | 2014-02-05 | 주식회사 일진글로벌 | Wheel bearing, constant velocity joint and jointing structure for wheel bearing and constant velocity joint |
| CN103335027A (en) * | 2013-07-17 | 2013-10-02 | 烟台开发区蓝鲸金属修复有限公司 | Universal joint pin cross bag universal joint coupler and repairing method thereof |
| CN213632955U (en) * | 2020-10-19 | 2021-07-06 | 洛阳西电电力设备有限公司 | Mechanical structure of copper pipe tensile strength test equipment |
| CN213658253U (en) * | 2020-12-04 | 2021-07-09 | 万向钱潮股份有限公司 | Testing device for radial bearing capacity of three-ball pin bearing |
| CN216349567U (en) * | 2021-10-27 | 2022-04-19 | 万向钱潮股份有限公司 | Universal test device for universal joint bearing strength test |
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| CN113959718A (en) | 2022-01-21 |
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