CN108732496A - The mini zone retarder electric machine testing device that choosing, shift mechanism use - Google Patents

The mini zone retarder electric machine testing device that choosing, shift mechanism use Download PDF

Info

Publication number
CN108732496A
CN108732496A CN201810469052.1A CN201810469052A CN108732496A CN 108732496 A CN108732496 A CN 108732496A CN 201810469052 A CN201810469052 A CN 201810469052A CN 108732496 A CN108732496 A CN 108732496A
Authority
CN
China
Prior art keywords
retarder
axis
motor
test device
holder
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.)
Pending
Application number
CN201810469052.1A
Other languages
Chinese (zh)
Inventor
刘颖
胡宇辉
王滨
陈志鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
North Link Motor (changshu) Vehicle Technology Co Ltd
Original Assignee
North Link Motor (changshu) Vehicle Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by North Link Motor (changshu) Vehicle Technology Co Ltd filed Critical North Link Motor (changshu) Vehicle Technology Co Ltd
Priority to CN201810469052.1A priority Critical patent/CN108732496A/en
Publication of CN108732496A publication Critical patent/CN108732496A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/34Testing dynamo-electric machines

Abstract

The invention discloses the mini zone retarder electric machine testing devices that a kind of choosing, shift mechanism use, it includes:Band retarder motor, test device, manual adjustment mechanism etc..The test device exports axis and on same central axis, axis and test device the output axis of manual adjustment mechanism are vertical with retarder motor output shaft line, is located at the top of test device output axis, in the same plane.The present invention is gradually to be pressurized to give band retarder motor output shaft by external force, and the transmission through auxiliary circuit connection signal realizes that the gradual increase of electric current or moment increase to the stable state or stall working condition of a certain value (peak-peak).The present invention is suitable for the small-sized steady state test with retarder direct current generator or DC micro-motor and stall is tested, handle through rotary manual adjustment mechanism, the test function of different conditions size of current can be realized by increasing or decreasing pellet pressure, there is the application value of manual operation test.

Description

The mini zone retarder electric machine testing device that choosing, shift mechanism use
Technical field
The invention patent relates to the choosing of AMT electric-control systems, shift mechanisms-executing agency, and in particular in choosing, shift mechanism Small-sized band retarder motor Specifications and functional test.
Background technology
Small-sized is the pure electric vehicle mechanism of a DC reductions of speed torque with retarder motor, in mechanical speed changes such as car, trucies The choosing of AMT electric-control systems, the extensive use in shift mechanism of case.But how to select high-quality, reliable, small, light weight and cost It is low, matching is good, meets the micro-machine and retarder of client's requirement, be the matter of utmost importance put in designer;Pass through sieve Choosing, theoretically meets the requirements, and whether the element of actual purchase reaches technical requirement, and follow-up series-produced buying matter Whether amount stablizes and product very important major issue of production process from researching and developing to criticizing;This just needs a means of testing, Detect the consistency of Purchased Item quality.The manual operation high test device with retarder motor of sensitivity how is developed, is The critical issue that we this time invent has certain demand and is widely applied value.
Invention content
, goal of the invention.
The present invention is can to increase or decrease by rotating the test device handle with retarder motor and be applied to band retarder Pellet pressure on motor output shaft, when band retarder electrical power, the transmission signal connected through auxiliary circuit, to realize The test function of different conditions size of current.
, the technical solution adopted in the present invention.
Electric machine testing device proposed by the invention, including band retarder motor, test device, manual adjustment mechanism, Band retarder electrical axis arranged direction is parallel with test device axis direction, manual adjustment mechanism axis direction and test device Horizontal axis direction is vertical, and its axis is in the same plane;The band retarder motor output shaft is inserted into test device, pressure For device with retarder motor output shaft perpendicular contact, manual adjustment mechanism gradually presses reduction by pressure apparatus with retarder The rotating speed of motor.
Further, the band retarder motor include DC motors, retarder pass through motor base installation fix, motor bottom Seat is equipped with the socket of DC motors, and shield is mounted on socket, and the side wall of shield is fixed on motor base motor base mounting hole On, the output shaft bore of DC motors, which is slightly less than retarder and is inserted into retarder, to be fixed.
Further, the test device includes cover board, holder, axis, adjusting pad, and the holder is body structure, It is provided with the through-hole passed through for retarder flat output shaft head on one side relative to retarder;The axis is mounted on the axis of holder Hollow second bushing of the heart, hollow first bushing and holder right side wall that are passed through on holder left side wall is relatively fixed, then By the through-hole of the cover board mounted on holder right end face, adjusting pad is through on the flat output shaft head with retarder motor 1, band Retarder motor is fixed on one end of holder the corresponding interface, make pellet groove center on axis and the centering of manual adjustment mechanism center and Pellet is in contact installation with axis,
Further, setting recess bullet groove above test device output axis, pellet is located at bullet groove bottom end and holder is built-in The annular groove on axis surface be in contact, the left end hole of axis is in contact with reducer output shaft head again;Axis pin axis passes through bullet groove Vertical with test device output axis, bottom and the pellet upper-end contact of axis pin, the lower half portion of axis pin is cased with spring, the first half Divide and positioning sleeve is installed, the nut of the external installation handle of positioning sleeve.
Further, cover board is fixed on the end of holder with one group of screw.
, the present invention caused by technique effect.
(1)The present invention is a kind of small-sized band retarder electric machine testing device, is suitable for small-sized reduction of speed, torque direct current slows down The testing current of device motor or DC micro-motor loads function.
(2)The present invention is coaxial by band decelerating motor and test device, and manual rotating device directly acts on test dress Set, compact-sized, transmission is direct, and using manual operation load function, sensitivity is high, stability is good, it is easy to carry, at The features such as this is low.
(3)The present invention provides a kind of means of testing easy to remove of detection power of motor for user.
Description of the drawings
Fig. 1 is the overall structure graphics of the present invention.
Fig. 2 is monnolithic case structure chart.
Fig. 3 is the A-A sectional views of Fig. 2.
Fig. 4 is the sectional view of Fig. 2.
Reference sign:
Band retarder motor 1, test device 2, manual adjustment mechanism 3;
Socket 1-1, DC motor 1-2, shield 1-3, retarder 1-4, spindle nose 1-5, motor base 1-6;
Cover board 2-1, the second bushing 2-2, axis 2-3, the first bushing 2-4, holder 2-5, adjusting pad 2-6;
Nut 3-1, handle 3-2, positioning sleeve 3-3, axis pin 3-4, spring 3-5, pellet 3-6, bullet groove 3-7.
Specific implementation mode
Embodiment 1
As shown in Figure 1, the present invention proposes a kind of choosing, the mini zone retarder electric machine testing device that uses of shift mechanism, including Band retarder motor 1, test device 2, manual adjustment mechanism 3,1 axis arranged direction of band retarder motor and 2 axis of test device Line direction is parallel, and 3 axis direction of manual adjustment mechanism is vertical with 2 horizontal axis direction of test device, and its axis is in same plane On;1 output shaft of band retarder motor is inserted into test device 2, and pressure apparatus connects with 1 output shaft of retarder motor is vertical It touches, manual adjustment mechanism 3 is gradually pressed by pressure apparatus reduces the rotating speed with retarder motor 1.
The band retarder motor 1 includes that DC motors 1-2, retarder 1-4 are fixed by motor base 1-6 installations, motor Pedestal 1-6 is equipped with the socket 1-1 of DC motors 1-2, and shield 1-3 is mounted on socket 1-1, and the side wall of shield 1-3 is fixed on electricity On machine base motor base 1-6 mounting holes, the output shaft bore of DC motors 1-2 is slightly less than retarder 1-4 and is inserted into retarder 1-4 It is fixed.
The test device includes cover board 2-1, holder 2-5, axis 2-3, adjusting pad 2-6, and the holder 2-5 is babinet knot Structure is provided with the through-hole passed through for retarder 1-4 flat output shaft heads 1-5 on one side relative to retarder 1-4;Cover board 2-1 The end of holder 2-5 is fixed on one group of screw.
The axis 2-3 is mounted on the axle center of holder 2-5, hollow first lining being passed through on holder 2-5 left side walls The hollow second bushing 2-2 of set 2-4 and holder right side wall is relatively fixed, then passes through the cover board mounted on holder 2-5 right end faces The through-hole of 2-1, for adjusting pad 2-6 through on the flat output shaft head 1-5 with retarder motor 1, band retarder motor 1 is fixed on branch One end of frame 2-5 the corresponding interface makes the pellet groove center on axis 2-3 and 3 center centering of manual adjustment mechanism and pellet 3-6 and axis 2-3 is in contact installation.
Test device 2 exports setting recess bullet groove 3-7, pellet 3-6 above axis and is located at the bottom ends bullet groove 3-7 and holder 2-5 The annular groove on the built-in surfaces axis 2-3 is in contact, and the left end hole of axis 2-3 is in contact with retarder 1-4 output shaft heads 1-5 again;Pin Axis 3-4 axis pass through bullet groove 3-7 vertical with the output axis of test device 2, bottom and the pellet 3-6 upper-end contacts of axis pin 3-4, The lower half portion of axis pin 3-4 is cased with spring 3-5, and top half is equipped with positioning sleeve 3-3, and the external of positioning sleeve 3-3 installs handle The nut 3-1 of 3-2.
Embodiment 2
As shown in Figure 1, the present invention's includes small-sized band retarder electric machine testing device;The small-sized band retarder electricity of the present invention Apparatus test device includes band retarder motor 1, test device 2, manual adjustment mechanism 3.
Wherein band retarder electrical axis arranged direction is parallel with test device axis arranged direction, manual adjustment mechanism axis Line arranged direction is vertical with test device axis arranged direction, in the same plane.
As shown in Figures 1 to 3, retarder motor described in present embodiment further includes the socket 1- on DC motor 1-2, DC motors 1, shield 1-3, motor base 1-6, retarder 1-4, spindle nose 1-5.
This design is realized in the case of DC electrical powers, realizes torque, the function of reduction of speed.
As shown in figures 2-3, test device described in present embodiment further includes cover board 2-1, holder 2-5, axis 2-3, adjusting pad 2-6 is respectively pressed into the first bushing 2-4 and the second bushing 2-2 on holder 2-5 in 39 concentric holes of both ends φ.
The transmission with retarder motor location and installation, fixation and power is realized in this design.
As shown in figs. 2 to 4, manual adjustment mechanism described in present embodiment further includes nut 3-1, handle 3-2, positioning sleeve 3- 3, axis pin 3-4, spring 3-5, pellet 3-6.
Hand supercharging is realized in this design, and the rotating speed with retarder motor is made constantly to change(I.e.:Reduction of speed), last moment reaches One new equalization point(I.e.:Stall)Function.
Mounting means:
The output shaft of DC motors 1-2 is inserted into retarder 1-4, is fixed with one group of screw, is first covered on upper motor before shield 1-3 installations After socket 1-1, shield 1-3 is fixed on the mounting hole of motor base with one group of screw.The upper two concentric holes difference of holder 2-5 It is pressed into the first bushing (2-4) and the second bushing 2-2.Adjusting pad 2-6 through on the flat output shaft head 1-5 with retarder motor 1, One end of holder 2-5 the corresponding interface is fixed on retarder motor 1.
Axis 2-3 initially passes through aperture outer end the first bushing (2-4) on holder 2-5, as the first supporting points of axis 2-3;Again according to Secondary the second bushing 2-2 on the holder 2-5) aperture, as the second supporting points of axis 2-3, make pellet groove center on axis 2-3 with 3 center centering of manual adjustment mechanism, cover board 2-1 are fixed on the end of holder 2-5 with one group of screw.
Pellet 3-6 is fitted into the hole above holder 2-5, then is sequentially loaded into axis pin 3-4, spring 3-5, positioning sleeve 3-3, is used The power being pressed downward is loaded on the nut 3-1 with handle 3-2;The connection type of its nut 3-1 and handle 3-2 can be welding or spiral shell Line connects.3 handle 3-2 of manual adjustment mechanism in test device 2 can increase or decrease pellet 3-6 and be applied to band retarder electricity Pressure on 1 output shaft of machine, DC motors 1-2 are powered, the transmission signal connected by auxiliary circuit, to realize different conditions The test function of size of current.
The course of work:
Small-sized has the function of the torque adjusted manually, reduction of speed with retarder electric machine testing device.
Include mainly:Band retarder motor, test device, manual adjustment mechanism.
Function with retarder motor 1:After DC motors 1-2 is powered, DC motor 1-2 output shafts are inputted to retarder 1-4 Axis passing power, by the transmission of retarder 1-4 planet row power, retarder 1-4 output shafts output power changes, and keeps DC electric The original output rotating speeds of machine 1-2 are reduced by retarder 1-4, and original output torque increases, to realize the work(of torque, reduction of speed Energy.
The function of test device 2:A mounting and fixing support is provided to band retarder motor 1, band retarder motor 1 is made to fix In on the holder 2-5 of test device 2, when 1 output shaft of band retarder motor exports power, the axis 2-3 in test device 2 is in band It is rotated under the transmission of the output axle power of retarder motor 1.To realize the transfer function of fixed and power.
The function of manual adjustment mechanism 3:Hand operates the handle 3-2 in manual adjustment mechanism 3, rotates clockwise, in spiral shell Under the action of screw thread guide track on cap 3-1 is downward, power has been transmitted to positioning sleeve 3-3 by nut 3-1, and positioning sleeve 3-3 is again power Spring 3-5 is passed to, spring 3-5 is made to compress downwards, axis pin 3-4 again passes the compressing force of spring 3-5 under the action of spring 3-5 Pellet 3-6 is passed, pellet 3-6 is made to move down;When the lower pressure that pellet 3-6 is generated is by small gradual increase, pellet 3-6 is continuous Overcome the output torque for the axis 2-3 for passing to test device 2 by the output shaft with retarder motor 1, and makes band retarder motor 1 Output shaft rotating speed continuously decrease so that moment stop, to realize test function.
The above embodiment is a preferred embodiment of the present invention, but embodiments of the present invention are not by above-described embodiment Limitation, it is other it is any without departing from the spirit and principles of the present invention made by changes, modifications, substitutions, combinations, simplifications, Equivalent substitute mode is should be, is included within the scope of the present invention.

Claims (5)

1. the mini zone retarder electric machine testing device that a kind of choosing, shift mechanism use, it is characterised in that:Band retarder motor (1), test device (2), manual adjustment mechanism (3),
Band retarder motor (1) axis arranged direction is parallel with test device (2) axis direction, manual adjustment mechanism (3) axis Direction is vertical with test device (2) horizontal axis direction, and its axis is in the same plane;The band retarder motor (1) is defeated Shaft is inserted into test device (2), and for pressure apparatus with retarder motor (1) output shaft perpendicular contact, manual adjustment mechanism (3) is logical Over-pressed power apparatus, which gradually presses, reduces the rotating speed with retarder motor (1).
2. the mini zone retarder electric machine testing device that choosing according to claim 1, shift mechanism use, feature exist In:The band retarder motor (1) include DC motors (1-2), retarder (1-4) pass through motor base (1-6) installation fix, electricity Machine base (1-6) is equipped with the socket (1-1) of DC motors (1-2), and shield (1-3) is mounted on socket (1-1), shield (1-3) Side wall be fixed on motor base motor base (1-6) mounting hole, the output shaft bore of DC motors (1-2) is slightly less than retarder (1-4) and it is inserted into retarder (1-4) fixation.
3. the mini zone retarder electric machine testing device that choosing according to claim 1, shift mechanism use, feature exist In:The test device includes cover board (2-1), holder (2-5), axis (2-3), adjusting pad (2-6), and the holder (2-5) is Body structure is passed through relative to being provided on one side for retarder (1-4) for retarder (1-4) flat output shaft head (1-5) Through-hole;
The axis (2-3) is mounted on the axle center of holder (2-5), is passed through hollow the first of holder (2-5) upper left side wall Hollow second bushing (2-2) of bushing (2-4) and holder right side wall is relatively fixed, then by being mounted on holder (2-5) right-hand end The through-hole of the cover board (2-1) in face, through on the flat output shaft head (1-5) with retarder motor 1, band slows down adjusting pad (2-6) Device motor (1) is fixed on one end of holder (2-5) the corresponding interface, makes the pellet groove center on axis (2-3) and manual adjustment mechanism (3) center centering and pellet (3-6) are in contact installation with axis (2-3).
4. the mini zone retarder electric machine testing device that choosing according to claim 3, shift mechanism use, feature exist In:Setting recess bullet groove (3-7) above test device (2) the output axis, pellet (3-6) are located at bullet groove (3-7) The annular groove on bottom end axis (2-3) surface built-in with holder (2-5) is in contact, the left end hole of axis (2-3) again with retarder (1-4) Output shaft head (1-5) is in contact;Axis pin (3-4) axis passes through bullet groove (3-7) vertical with test device (2) output axis, pin The lower half portion of the bottom of axis (3-4) and pellet (3-6) upper-end contact, axis pin (3-4) is cased with spring (3-5), top half peace Equipped with positioning sleeve (3-3), the nut (3-1) of the external installation handle (3-2) of positioning sleeve (3-3).
5. the mini zone retarder electric machine testing device that choosing according to claim 3, shift mechanism use, feature exist In:The cover board (2-1) is fixed on the end of holder (2-5) with one group of screw.
CN201810469052.1A 2018-05-16 2018-05-16 The mini zone retarder electric machine testing device that choosing, shift mechanism use Pending CN108732496A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810469052.1A CN108732496A (en) 2018-05-16 2018-05-16 The mini zone retarder electric machine testing device that choosing, shift mechanism use

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810469052.1A CN108732496A (en) 2018-05-16 2018-05-16 The mini zone retarder electric machine testing device that choosing, shift mechanism use

Publications (1)

Publication Number Publication Date
CN108732496A true CN108732496A (en) 2018-11-02

Family

ID=63937395

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810469052.1A Pending CN108732496A (en) 2018-05-16 2018-05-16 The mini zone retarder electric machine testing device that choosing, shift mechanism use

Country Status (1)

Country Link
CN (1) CN108732496A (en)

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003164113A (en) * 2001-11-21 2003-06-06 Mabuchi Motor Co Ltd Rotation detector for small-sized motor equipped with worm reducer
CN102410931A (en) * 2011-07-27 2012-04-11 重庆齿轮箱有限责任公司 Testing apparatus of axial load loading of gear case and testing method thereof
CN102998252A (en) * 2012-11-29 2013-03-27 北京理工大学 Rolling/sliding contact fatigue test device
WO2015096796A1 (en) * 2013-12-26 2015-07-02 深圳市配天智造装备股份有限公司 Speed reducer testing device
CN105547701A (en) * 2016-02-29 2016-05-04 华南理工大学 Dynamic load testing device for thin-wall bearing detecting table
CN105571864A (en) * 2016-02-29 2016-05-11 华南理工大学 Static load test device for thin wall bearing detection table
CN105910820A (en) * 2016-06-30 2016-08-31 华南理工大学 Detecting platform capable of simulating vibrating fault of harmonic reducer
CN205620127U (en) * 2016-02-29 2016-10-05 华南理工大学 Thin wall bearing examines test table static load testing arrangement
CN106596004A (en) * 2017-01-04 2017-04-26 南京工程学院 RV speed reducer support stiffness testing device
CN106769021A (en) * 2017-01-15 2017-05-31 吉林大学 A kind of industrial robot power unit reliability test bench
CN107143646A (en) * 2017-06-20 2017-09-08 北理慧动(常熟)车辆科技有限公司 The horizontal pure electronic choosing of AMT control systems, shifter
CN206855484U (en) * 2017-03-27 2018-01-09 江苏汇博机器人技术股份有限公司 A kind of test device of robot Power Component
CN208270731U (en) * 2018-05-16 2018-12-21 北理慧动(常熟)车辆科技有限公司 The mini zone retarder electric machine testing device that choosing, shift mechanism use

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003164113A (en) * 2001-11-21 2003-06-06 Mabuchi Motor Co Ltd Rotation detector for small-sized motor equipped with worm reducer
CN102410931A (en) * 2011-07-27 2012-04-11 重庆齿轮箱有限责任公司 Testing apparatus of axial load loading of gear case and testing method thereof
CN102998252A (en) * 2012-11-29 2013-03-27 北京理工大学 Rolling/sliding contact fatigue test device
WO2015096796A1 (en) * 2013-12-26 2015-07-02 深圳市配天智造装备股份有限公司 Speed reducer testing device
CN205620127U (en) * 2016-02-29 2016-10-05 华南理工大学 Thin wall bearing examines test table static load testing arrangement
CN105547701A (en) * 2016-02-29 2016-05-04 华南理工大学 Dynamic load testing device for thin-wall bearing detecting table
CN105571864A (en) * 2016-02-29 2016-05-11 华南理工大学 Static load test device for thin wall bearing detection table
CN105910820A (en) * 2016-06-30 2016-08-31 华南理工大学 Detecting platform capable of simulating vibrating fault of harmonic reducer
CN106596004A (en) * 2017-01-04 2017-04-26 南京工程学院 RV speed reducer support stiffness testing device
CN106769021A (en) * 2017-01-15 2017-05-31 吉林大学 A kind of industrial robot power unit reliability test bench
CN206855484U (en) * 2017-03-27 2018-01-09 江苏汇博机器人技术股份有限公司 A kind of test device of robot Power Component
CN107143646A (en) * 2017-06-20 2017-09-08 北理慧动(常熟)车辆科技有限公司 The horizontal pure electronic choosing of AMT control systems, shifter
CN208270731U (en) * 2018-05-16 2018-12-21 北理慧动(常熟)车辆科技有限公司 The mini zone retarder electric machine testing device that choosing, shift mechanism use

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
吴肇良: "减速器、液压马达性能测试台研究", 中国水运(下半月), vol. 9, no. 08, pages 144 - 145 *

Similar Documents

Publication Publication Date Title
CN100594365C (en) Angular contact ball bearing fatigue life test bench
CN107818868B (en) Electromagnetic wire winding machine
CN203045343U (en) Drilling tool for retarder bracket
CN208270731U (en) The mini zone retarder electric machine testing device that choosing, shift mechanism use
CN105841963B (en) A kind of friction-loaded brake type bearing running testing stand
CN108732496A (en) The mini zone retarder electric machine testing device that choosing, shift mechanism use
CN112018579A (en) Double slip ring device with strong current and weak current separated
CN207171578U (en) A kind of localization tool for auto parts
CN206364644U (en) A kind of quick assembling combined power generation equipment
CN215357776U (en) Spherical head inner wall polishing equipment
CN201054544Y (en) Non contact rotary power converter
CN211682460U (en) A cutting device for waterproofing membrane
CN109869424A (en) Disc brake parking arrestment mechanism
CN208069597U (en) A kind of expansible separate assembling seat belt retractor
CN220066723U (en) Automobile wire harness bracket
CN116799539B (en) Crown spring capable of reducing insertion force of docking plug
CN2122445U (en) Trimming constant voltage generator
CN213959636U (en) Adjustable weak current wire harness fixing device
CN114291642B (en) Wire coil carrier
CN216487590U (en) High-voltage power transformer
CN220011692U (en) Cable transportation fixing device
CN114110044B (en) Radial braking device, motor and wind driven generator
CN220658855U (en) Transmission structure and iron core winding equipment
CN217736194U (en) Anti-interference driving connection device of high-precision radial force measuring roller
CN214256020U (en) Speed regulating motor

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