CN110567707B - Friction plate impact plastic deformation test device - Google Patents
Friction plate impact plastic deformation test device Download PDFInfo
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- CN110567707B CN110567707B CN201910747944.8A CN201910747944A CN110567707B CN 110567707 B CN110567707 B CN 110567707B CN 201910747944 A CN201910747944 A CN 201910747944A CN 110567707 B CN110567707 B CN 110567707B
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- plastic deformation
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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
- G01M13/02—Gearings; Transmission mechanisms
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/08—Shock-testing
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a friction plate impact plastic deformation testing device which comprises a base, an electromagnetic vibration exciter, a transmission mechanism, an installation limiting mechanism, a protective box, external teeth and internal teeth, wherein the external teeth are segmented friction plates to be tested; the electromagnetic vibration exciter and the protection box are fixedly connected on the base, the installation limiting mechanism is fixedly connected on the protection box, the electromagnetic vibration exciter is connected with the transmission mechanism, the transmission mechanism is fixedly connected with the inner teeth and then installed in the protection box, the outer teeth and the installation limiting mechanism are installed in a matched mode, radial displacement is restrained, small gaps are formed between the outer teeth and the installation limiting mechanism, free vibration is guaranteed, and the outer teeth also have a certain range of freedom degree of circumferential rotation; the external tooth pair of the internal tooth is meshed with the internal tooth pair of the external tooth; the transmission mechanism converts linear motion generated by the electromagnetic vibration exciter into circular motion of the inner teeth, the outer teeth rotate freely for a certain angle and then are limited by the limiting mechanism, and simulation of impact plastic deformation working conditions of the tooth parts of the friction plates is achieved.
Description
Technical Field
The invention relates to a test device, in particular to a test device for simulating impact plastic deformation of a friction plate tooth part, and belongs to the technical field of test equipment.
Background
In the running process of a vehicle, a gear shifting control element is used as a key component of a transmission system, so that failure problems such as impact plastic deformation, fatigue fracture, contact surface fatigue deformation and the like often occur, the braking performance of the vehicle is seriously influenced, and the service life of a transmission device is seriously limited to be greatly prolonged. The load borne by the tooth part of the gear shifting control element is random load, the test result dispersion coefficient on the existing friction plate dynamic strength test bed is large, the comparability is poor, the data reliability is low, time and cost are very high, and the load type borne by the tooth part cannot be decoupled and analyzed. Due to the torsional vibration of a shafting and the floating support structure characteristics of the gear shifting control element, the core plate tooth part of the gear shifting control element bears torsional vibration impact load and gear shifting impact load, and the core plate tooth part is a main load source for generating fatigue cracks on the core plate tooth part of the friction plate.
Therefore, the impact stress borne by the friction plate tooth part in the fracture process is of great importance, and in order to realize the fatigue life design of the friction plate, the impact load characteristic of the friction plate tooth part needs to be obtained, so that a special load testing device needs to be developed to simulate the working condition.
Disclosure of Invention
In view of the above, the invention provides a friction plate impact plastic deformation testing device, which can directly simulate a contact plastic deformation load caused by impact contact stress and reproduce the contact plastic deformation fatigue damage of a tooth surface of a friction plate.
A friction plate impact plastic deformation test device comprises a base, an electromagnetic vibration exciter, a transmission mechanism, an installation limiting mechanism, a protective box, external teeth and internal teeth, wherein the external teeth are segmented friction plates to be tested, and the internal teeth are provided with external tooth pairs in a number corresponding to that of the segmented friction plates;
the electromagnetic vibration exciter and the protection box are fixedly connected on the base, the installation limiting mechanism is fixedly connected on the protection box, the electromagnetic vibration exciter is connected with the transmission mechanism, the transmission mechanism is fixedly connected with the inner teeth and then installed in the protection box, the outer teeth and the installation limiting mechanism are installed in a matched mode, radial displacement is restrained, small gaps are formed between the outer teeth and the installation limiting mechanism, free vibration is guaranteed, and the outer teeth also have a certain range of freedom degree of circumferential rotation; the external tooth pairs of the internal teeth are meshed with the internal tooth pairs of the external teeth; the transmission mechanism converts linear motion generated by the electromagnetic vibration exciter into circular motion of the inner teeth, the outer teeth freely rotate for a certain angle and then are limited by the limiting mechanism, so that the outer teeth collide with the inner teeth, and simulation of impact plastic deformation working conditions of the tooth parts of the friction plates is realized.
Further, the transmission mechanism comprises a transmission rod, a rocker arm and a shaft disc; one end of the transmission rod is movably connected with the output end of the electromagnetic vibration exciter, the other end of the transmission rod is movably connected with one end of the rocker arm, the other end of the rocker arm is movably connected with a shaft disc fixed on the protection box, and the inner teeth are fixedly connected with one end, corresponding to the shaft disc, of the rocker arm.
Further, installation stop gear is including solid fixed ring, fender ring sum dog, have an annular step that holds the external tooth on solid fixed ring's the torus, the external tooth is installed and will keep off the ring after in annular step and fix on solid fixed ring, keeps off the ring and restricts the external tooth in annular step, has the booth clearance when the radial displacement of external tooth is retrained and guarantees its free vibration, and the external tooth still has along solid fixed ring axis pivoted degree of freedom, annular step be fixed with the dog on the surface, the dog is located the front and back both ends of external tooth, and the dog restricts external tooth pivoted degree of freedom at certain angular range.
Furthermore, shaft sleeves of tin bronze are arranged inside the mounting holes in the rocker arms, and tin bronze gaskets are mounted between the rocker arms and the shaft discs.
Has the advantages that:
1. the invention adopts a high-performance electromagnetic vibration exciter to provide a power source, the inner teeth are fixedly connected with the rocker arm, and the rocker arm and the electromagnetic vibration exciter are hinged together by adopting a transmission rod. The electromagnetic vibration exciter transmits alternating load to one end, far away from the inner teeth, of the rocker arm through transmission, the rocker arm swings up and down circularly and drives the inner teeth to move along the circumferential direction, instantaneous impact on the inner teeth and the outer teeth is realized through limiting of the stop block, and the frequency and the stroke of the electromagnetic vibration exciter are adjustable, so that the impact plastic deformation characteristic of the friction plate inner gear pair under the influence of different impact amplitudes, frequencies and impact forces can be simulated.
2. The test platform is convenient to assemble, disassemble and replace a test piece, the main body framework adopts an integrated assembly form of each functional module, each module of the test platform has a relative independent structure, the modules are mutually matched without interference influence, and the test platform is convenient to install, adjust and disassemble and high in universality.
3. The invention has high safety, and the platform design fully considers the safety of the test process. The protective shell is designed on the platform, so that the error collision of personnel is avoided, a relatively closed test environment is provided, and the test is ensured to be carried out without interference; simultaneously, this test bench belongs to high frequency impact vibration equipment, and in the experimental test process, the friction disc receives fatigue load, and the extreme condition such as fracture departure can appear, increases the emergence that the above-mentioned incident can be avoided to the sound insulation protection case to noise abatement by a wide margin.
4. The invention has high reliability and practicability, adopts simple and reasonable vibration reduction and friction reduction structural design, can avoid unpredictable test errors caused by excessively complex structure as much as possible, and eliminates uncertain factors influencing test results.
5. The friction plates are vertically arranged, so that the simultaneous loading test of a plurality of friction plates with few teeth can be met, and the consistency of the load and boundary conditions of the friction plates with few teeth can be ensured. The installation limiting mechanism restrains the radial displacement of the friction plate with few teeth, and meanwhile, a plurality of gaps are reserved, so that the free vibration of the friction plate is ensured, and the real impact plastic deformation load working condition of the friction plate can be simulated.
Drawings
FIG. 1 is a schematic structural diagram of a friction plate impact plastic deformation testing device according to the present invention;
FIG. 2 is a rear view of the friction plate impact plastic deformation testing apparatus of the present invention (with the protective case removed);
FIG. 3 is a schematic view showing the installation relationship between the inner and outer teeth and the installation limiting mechanism (the outer teeth are three stages of samples);
FIG. 4 is a schematic view of the connection of the transmission mechanism of the present invention;
FIG. 5 is a schematic view of the mounting relationship of the rocker arm and the hub of the present invention;
FIG. 6 is a schematic view of the installation relationship of the inner teeth and the adjustment disc of the present invention.
The vibration damper comprises a 1-electromagnetic vibration exciter, a 2-external tooth, a 3-internal tooth, a 4-rocker arm, a 5-transmission rod, a 6-fixing ring, a 7-baffle ring, an 8-protection box, a 9-base, a 10-shaft disc, a 11-anti-loose bolt, a 12-adjusting disc, a 13-clamp spring, a 14-shaft sleeve, a 15-gasket and a 16-stop block.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
As shown in the accompanying drawings 1 and 2, the invention provides a friction plate impact plastic deformation test device, which comprises a base 9, an electromagnetic vibration exciter 1, a rocker arm 4, a transmission rod 5, a shaft disc 10, a fixing ring 6, a baffle ring 7, a baffle block 16, a protection box 8, external teeth 2 and internal teeth 3, wherein the external teeth 2 are divided into three sections of friction plates to be tested, and the internal teeth 3 are provided with external tooth pairs meshed with the internal tooth pairs of the friction plates;
electromagnetic vibration exciter 1 passes through the leg joint on base 9, guard box 8 also links firmly on base 9 simultaneously, 6 fixed connection of solid fixed ring are on guard box 8, keep off ring 7 with the restriction of external tooth 2 on solid fixed ring 6, 2 radial displacement of external tooth have the booth clearance when restricting and guarantee free vibration, external tooth 2 still has along circumferential direction's degree of freedom, it is spacing by dog 16 after the certain angle of external tooth free rotation, realize that friction disc tooth portion takes place to strike and moulds the simulation of becoming the operating mode.
One end of a transmission rod 5 is movably connected with the output end of the electromagnetic vibration exciter 1, the other end of the transmission rod 5 is movably connected with one end of a rocker arm 4, the other end of the rocker arm 4 is movably connected with a shaft disc 10 fixed on the protection box, an internal tooth 3 is fixedly connected with one end, corresponding to the shaft disc 10, of the rocker arm 4, and an external tooth pair of the internal tooth 3 is meshed with an internal tooth pair of the external tooth 2; the electromagnetic vibration exciter 1 provides a power source for a transmission rod 5 connected with the electromagnetic vibration exciter 1, the transmission rod 5 pushes the rocker arm 4 to rotate around the central axis of the shaft disc 10, the linear reciprocating motion generated by the electromagnetic vibration exciter 1 is converted into the circular motion of the inner teeth 3, the continuous vibration of the inner teeth 3 and the outer teeth 2 is realized, and the electromagnetic vibration exciter 1 outputs linear motion with different frequencies and amplitudes outwards.
The shape of the internal teeth 3 is designed into a three-jaw gear, so that the structure mass is reduced, the rotational inertia is reduced, the load of a system is reduced, and the service life is prolonged without influencing the experimental purpose.
As shown in fig. 3, the fixing ring 6, the baffle ring 7 and the stopper 16 together form a mounting limiting mechanism for mounting the external teeth 2 on the protection box 8, an annular step for accommodating the external teeth is arranged on the annular surface of the fixing ring 6, the baffle ring 7 is fixed on the fixing ring 6 after the external teeth 2 are mounted in the annular step, the external teeth are limited in the annular step by the baffle ring 7, the radial displacement of the external teeth 2 is limited while a small gap is formed to ensure free vibration of the external teeth 2, and the external teeth 2 also have a degree of freedom of rotation along the axis of the fixing ring; the surface of the annular step is fixedly provided with a stop block 16, the stop block 16 is positioned at the front end and the rear end of the external tooth 2, and the stop block 16 limits the degree of freedom of the external tooth rotation within a certain angle range.
As shown in fig. 4, the transmission rod 5, the rocker arm 4 and the shaft disc 10 together form a transmission mechanism, wherein the shaft disc 10 has a central shaft and a chassis, the central shaft is used for matching with a central hole on the rocker arm, the shaft disc 10 is used for fixing with the protection box 8, an installation groove for installing the internal teeth 3 is further arranged at one end of the rocker arm 4 matching with the shaft disc 10, and the above structure can convert the reciprocating linear motion of the electromagnetic vibration exciter 1 into rotation around the shaft disc 10.
As shown in figure 5, in order to reduce the motion friction and the resistance, tin bronze shaft sleeves are arranged inside the mounting holes in the rocker arm 4, and tin bronze gaskets are mounted between the rocker arm 4 and the shaft discs.
As shown in fig. 6, the internal teeth 3 are mounted on the rocker arm 4 through an adjusting plate 12, and the two are fixed through a locking bolt 11 and a snap spring 13.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. A friction plate impact plastic deformation test device is characterized by comprising a base, an electromagnetic vibration exciter, a transmission mechanism, a mounting limiting mechanism, a protective box, external teeth and internal teeth, wherein the external teeth are segmented friction plates to be tested, and the internal teeth are provided with external tooth pairs in a number corresponding to that of the segmented friction plates;
the electromagnetic vibration exciter and the protection box are fixedly connected on the base, the installation limiting mechanism is fixedly connected on the protection box, the electromagnetic vibration exciter is connected with the transmission mechanism, the transmission mechanism is fixedly connected with the inner teeth and then installed in the protection box, the outer teeth and the installation limiting mechanism are installed in a matched mode, radial displacement is restrained, small gaps are formed between the outer teeth and the installation limiting mechanism, free vibration is guaranteed, and the outer teeth also have a certain range of freedom degree of circumferential rotation; the external tooth pairs of the internal teeth are meshed with the internal tooth pairs of the external teeth; the transmission mechanism converts linear motion generated by the electromagnetic vibration exciter into circular motion of the inner teeth, the outer teeth rotate freely for a certain angle and then are limited by the limiting mechanism, and simulation of impact plastic deformation working conditions of the tooth parts of the friction plates is achieved.
2. The friction plate impact plastic deformation testing device of claim 1, wherein the transmission mechanism comprises a transmission rod, a rocker arm and a shaft disc; one end of the transmission rod is movably connected with the output end of the electromagnetic vibration exciter, the other end of the transmission rod is movably connected with one end of the rocker arm, the other end of the rocker arm is movably connected with a shaft disc fixed on the protection box, and the inner teeth are fixedly connected with one end, corresponding to the shaft disc, of the rocker arm.
3. The friction plate impact plastic deformation test device of claim 1 or 2, wherein the mounting limiting mechanism comprises a fixing ring, a baffle ring and a stop block, an annular step for accommodating the external teeth is arranged on the circular ring surface of the fixing ring, the baffle ring is fixed on the fixing ring after the external teeth are mounted in the annular step, the external teeth are limited in the annular step by the baffle ring, the radial displacement of the external teeth is limited while small gaps are formed to guarantee free vibration of the external teeth, the external teeth also have freedom degree rotating along the axis of the fixing ring, the stop block is fixed on the surface of the annular step and located at the front end and the rear end of the external teeth, and the stop block limits the freedom degree of rotation of the external teeth in a certain angle range.
4. The friction plate impact plastic deformation test device of claim 2, wherein tin bronze bushings are arranged inside the mounting holes in the rocker arm, and tin bronze gaskets are arranged between the rocker arm and the shaft disc.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910747944.8A CN110567707B (en) | 2019-08-14 | 2019-08-14 | Friction plate impact plastic deformation test device |
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| CN201910747944.8A CN110567707B (en) | 2019-08-14 | 2019-08-14 | Friction plate impact plastic deformation test device |
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| CN110567707A CN110567707A (en) | 2019-12-13 |
| CN110567707B true CN110567707B (en) | 2021-05-14 |
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Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3025824B2 (en) * | 1991-04-27 | 2000-03-27 | 愛知製鋼株式会社 | Wear monitoring device for clutch friction plate |
| KR100397712B1 (en) * | 2001-03-16 | 2003-09-13 | 주식회사 만도 | Torque sensor for vehicle |
| CN100554931C (en) * | 2006-03-06 | 2009-10-28 | 中国北方车辆研究所 | Experimental unit for dynamic strength of friction disk |
| CN103837341B (en) * | 2014-01-24 | 2016-06-01 | 中国北方车辆研究所 | The method of friction plate teeth portion circumference load distribution is obtained by becoming contact stiffness test |
| CN103900814B (en) * | 2014-04-30 | 2016-02-10 | 湖北三环离合器有限公司 | Dual dry clutch multifunctional integrated experimental bench |
| CN104634676B (en) * | 2015-02-13 | 2017-09-01 | 中国北方车辆研究所 | A kind of system for controlling the method for friction plate dynamic test load and realizing this method |
| CN105527098A (en) * | 2016-01-28 | 2016-04-27 | 天津市松正电动汽车技术股份有限公司 | Clutch testing device and testing method |
| CN108398262B (en) * | 2018-02-08 | 2020-04-21 | 北京航空航天大学 | Wet friction pair belt row torque test bed and test method |
| CN109262196B (en) * | 2018-10-16 | 2021-04-23 | 内蒙古第一机械集团股份有限公司 | Sliding pressure strengthening method for internal tooth root of powder metallurgy friction plate |
| CN208872512U (en) * | 2018-11-08 | 2019-05-17 | 山西维达机械制造有限公司 | A kind of experimental rig for testing clutch friction plate |
| CN109872300B (en) * | 2018-12-17 | 2021-02-19 | 南京工大数控科技有限公司 | Visual saliency detection method for appearance defects of friction plate |
| CN110043572B (en) * | 2019-05-15 | 2023-10-10 | 浙江华信汽车零部件有限公司 | Novel nonlinear torque transmission clutch driven disc assembly |
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