CN204535983U - Mechanical close gear test stand - Google Patents
Mechanical close gear test stand Download PDFInfo
- Publication number
- CN204535983U CN204535983U CN201520161755.XU CN201520161755U CN204535983U CN 204535983 U CN204535983 U CN 204535983U CN 201520161755 U CN201520161755 U CN 201520161755U CN 204535983 U CN204535983 U CN 204535983U
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Abstract
The utility model provides a mechanical close gear test stand, comprising: motor, tested gear case, accompany examination gear case, elastic shaft, force generator, load; Be connected by the first shaft coupling transmission between motor with tested gear case, tested gear case is connected with load transmission by the second shaft coupling, the 3rd shaft coupling, the 4th shaft coupling; Rotating shaft between tested gear case and the second shaft coupling is provided with the first torque rotary speed sensor; Tested gear case tries to be connected by 5-linked axial organ, the first joint, elastic shaft, the second joint, the 6th shaft coupling transmission between gear case with accompanying; Rotation axis between 5-linked axial organ and the first joint is provided with the second torque rotary speed sensor; Rotation axis between second joint and the 6th shaft coupling is provided with interior helical teeth loader; Examination gear case is accompanied to be connected by the 7th shaft coupling transmission with between force generator.The utility model achieves and can not start under full capacity, can on-stream loading or adjustment load.
Description
Technical field
The utility model relates to mechanical field, particularly relates to a kind of mechanical close gear test stand.
Background technology
Mechanical close gear test stand carries out to wheel box the test unit that the strength of gear teeth and gear life test for mechanical processing industry.At present, the triformed loading method of mechanical close gear test stand, i.e. mechanical type, fluid pressure type and pneumatic type etc.Wherein the kind of machinery loading device is a lot, and structure is simple, but their common shortcomings to be started under full capacity, can not on-stream loading or adjustment load.
Utility model content
The purpose of this utility model is the defect solving the existence of above-mentioned prior art, provides one just can start under not being fully loaded situation, and can on-stream loading or adjustment load.
One mechanical close gear test stand, comprising: motor, tested gear case, accompany examination gear case, elastic shaft, force generator, load; Be connected by the first shaft coupling transmission between described motor and the top cog of tested gear case, the bottom cog of described tested gear case is connected with load transmission by the second shaft coupling, the 3rd shaft coupling, the 4th shaft coupling; Rotating shaft between the bottom cog and the second shaft coupling of tested gear case is provided with the first torque rotary speed sensor;
Described tested gear case tries to be connected by 5-linked axial organ, the first joint, elastic shaft, the second joint, the 6th shaft coupling transmission between gear case with accompanying; Rotation axis between 5-linked axial organ and the first joint is provided with the second torque rotary speed sensor; Rotation axis between second joint and the 6th shaft coupling is provided with interior helical teeth loader; Examination gear case is accompanied to be connected by the 7th shaft coupling transmission with between force generator.
Further, mechanical close gear test stand as above, described interior helical teeth loader comprises: body, left end cap, right end cap are set respectively at the two ends, left and right of body, in the cavity formed by body, left end cap, right end cap, are provided with Left Drive axle, right transmission shaft, interior helical teeth cover, pull bar; Described right driving sleeve is connected on pull bar, and the left end of pull bar inserts after in Left Drive axle and is fixedly connected with it, described Left Drive axle and interior helical teeth overlap between by four block teeth of respective end face and bolt and nut castellated connect as one; Left single-row radial ball bearing, right single-row radial ball bearing is respectively arranged with at the two ends, left and right of Left Drive axle; Left bearing with cross roller convex symmetrical roller bearing, right bearing with cross roller convex symmetrical roller bearing is respectively arranged with at the two ends, left and right that interior helical teeth overlaps; Left Drive axle two ends, left and right be respectively arranged with left single-row garden taper roller bearing, right single-row garden taper roller bearing.
Further, mechanical close gear test stand as above, described force generator comprises: body, arranges left end cap, right end cap respectively at the two ends, left and right of body; Left bearing with cross roller convex symmetrical roller bearing, shaft coupling, right bearing with cross roller convex symmetrical roller bearing, movable axle bearing, worm gear, screw rod is provided with in the cavity formed by body, left end cap, right end cap; Connected by shaft coupling between described left bearing with cross roller convex symmetrical roller bearing, right bearing with cross roller convex symmetrical roller bearing, the left end of left bearing with cross roller convex symmetrical roller bearing is connected with turning axle, and the end of turning axle is fixedly connected with the 7th shaft coupling by the 6th shaft coupling with the pull bar of interior helical teeth loader through behind the center of left end cap; Described right bearing with cross roller convex symmetrical roller bearing is fixedly connected with movable axle bearing, and movable axle bearing is fixedly connected with one end of screw rod, worm gear be socketed on screw rod, the below of worm gear is engaged with worm screw; Left single-row garden taper roller bearing, right single-row garden taper roller bearing is respectively arranged with in the left and right sides of worm gear, between the taper roller bearing of the single-row garden in the right side of worm gear and the right side, be provided with nut, between the taper roller bearing of the single-row garden in the left side of worm gear and a left side, be provided with rotating nut.
The mechanical close gear test stand that the utility model provides, when the electro-motor is turning, drive tested gear case and accompany examination gear case high speed shaft and together with the interior axle at helical teeth loader two ends and the turning axle synchronous axial system of force generator, now, tested gear case with accompany the slow-speed shaft trying gear case also to rotate thereupon.When loaded, only needing the size by regulating force generator, just can regulate the size of load, simultaneously by regulating force generator, making interior helical teeth loader be connected with elastic shaft or disconnect, thus realizing the load or unload of load.
Accompanying drawing explanation
Fig. 1 is the utility model mechanical close gear test stand system construction drawing;
Fig. 2 is helical teeth loader structural representation in the utility model;
Fig. 3 is the utility model force generator structural representation;
Fig. 4 is that the A-A of Fig. 3 is to cut-open view.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearly, below technical scheme in the utility model be clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Fig. 1 is the utility model mechanical close gear test stand system construction drawing, and as shown in Figure 1, the mechanical close gear test stand that the utility model provides, comprising: motor 1, tested gear case 3, accompany examination gear case 10, elastic shaft 11, force generator 13, load 14; Be in transmission connection by the first shaft coupling 2 between described motor 1 and the top cog of tested gear case 3, the bottom cog of described tested gear case 3 is in transmission connection with load 14 by the second shaft coupling 18, the 3rd shaft coupling 16, the 4th shaft coupling 15; Rotating shaft between the bottom cog and the second shaft coupling 18 of tested gear case 3 is provided with the first torque rotary speed sensor 17; Described force generator 13 is for regulating or load, unload the load of whole testing table;
Described tested gear case 3 and accompany and try to be in transmission connection by 5-linked axial organ 4, first joint 6, elastic shaft 11, second joint 7, the 6th shaft coupling 9 between gear case 10; Rotation axis between 5-linked axial organ 4 and the first joint 6 is provided with the second torque rotary speed sensor 5; Rotation axis between second joint 7 and the 6th shaft coupling 9 is provided with interior helical teeth loader 8; Accompany between examination gear case 10 and force generator 13 and be in transmission connection by the 7th shaft coupling 12.Described interior helical teeth loader 8 is for the load of load or unload force generator 13.
The mechanical close gear test stand that the utility model provides, when motor 1 rotates, drive tested gear case 3 and accompany examination gear case 10 high speed shaft and together with the interior axle at helical teeth loader 8 two ends and the turning axle synchronous axial system of force generator 13, now, tested gear case with accompany the slow-speed shaft trying gear case also to rotate thereupon.When loaded, only needing the size by regulating force generator 13, just can regulate the size of load, simultaneously by regulating force generator 13, making interior helical teeth loader 8 be connected with elastic shaft or disconnect, thus realizing the load or unload of load.
Further, mechanical close gear test stand as above, as shown in Figure 2, described interior helical teeth loader 8 comprises: body 812, left end cap 82, right end cap 86 are set respectively at the two ends, left and right of body 812, in the cavity formed by body 812, left end cap 82, right end cap 86, are provided with Left Drive axle 83, right transmission shaft 85, interior helical teeth cover 84, pull bar 811; Described right transmission shaft 85 is socketed on pull bar 811, the left end of pull bar 811 inserts after in Left Drive axle 83 and is fixedly connected with it, described Left Drive axle 83 and interior helical teeth overlap between 84 by four of respective end face block teeth and bolt and nut castellated connect as one; Left single-row radial ball bearing 87, right single-row radial ball bearing 88 is respectively arranged with at the two ends, left and right of Left Drive axle 83; Left bearing with cross roller convex symmetrical roller bearing 89, right bearing with cross roller convex symmetrical roller bearing 81 is respectively arranged with at the two ends, left and right of interior helical teeth cover 84; Left Drive axle 83 two ends, left and right be respectively arranged with left single-row garden taper roller bearing 810, right single-row garden taper roller bearing 813.
The main member of described interior helical teeth loader 8 has Left Drive axle 83, this Left Drive axle 83 is connected successively by the second joint 7 in Fig. 1, elastic shaft 11, first joint 6, second torque rotary speed sensor 5, and interior helical teeth loader 8 is with tested gear case 3 and the high speed shaft synchronous axial system (see Fig. 1) of accompanying examination gear case 10.Fig. 2. in Left Drive axle 83 and interior helical teeth overlap 84 by four block teeth of respective end face add bolt and nut castellated be coupled to integrally.When Left Drive axle 83 rotates, drive together with overlapping 84 with helical teeth in being fixedly connected with on the right side of it and rotate.The left side of interior helical teeth cover 84 is straight tooth structure, this straight-tooth part combines with the right transmission shaft 85 of straight-tooth in band again, thus make right transmission shaft 85 high speed shaft synchronous axial system with gear case together with Left Drive axle 83 is under interior helical teeth overlaps the connection function of 84, when to right transmission shaft 85 1 external force to make it to be moved to the left, interior helical teeth cover 84 separates with right transmission shaft 85, thus achieve being separated of Left Drive axle 83 and right transmission shaft 85, namely achieve the unloading to testing table load; When to right transmission shaft 85 1 external force to make it to move right, interior helical teeth cover 84 is engaged by straight-tooth with right transmission shaft 85, thus achieves Left Drive axle 83 and the merging of right transmission shaft 85, namely achieves the loading to testing table load.Fig. 2. in left single-row radial ball bearing 87, right single-row radial ball bearing 88 bear not too large radial force.Left single-row garden taper roller bearing 810, right single-row garden taper roller bearing 813 bear not too large radial force and axial force simultaneously.Left bearing with cross roller convex symmetrical roller bearing 89, right bearing with cross roller convex symmetrical roller bearing 81, when loading or adjust load, bear the axial force from force generator.Known as calculated, select this kind of bearing that specification, model are suitable, the life-span is enough, uses reliable.Pull bar 811 plays a part to transmit axial force.This pull bar 811 should select the material that yield strength is high.Left end cap 82, right end cap 86 are labyrinth structure with the cooperation place of Left Drive axle 83, right transmission shaft 85.They prevent the leakage of two ends lubricating oil separately together with the disc 814 at two ends.Body 812 is welded structure.
The course of work of interior helical teeth loader:
When no-load running, there is no relative corner (also namely both couple together overlapping 84 by interior helical teeth with right transmission shaft 85 by Left Drive axle 83) between Left Drive axle 83 with right transmission shaft 85, therefore in gear case, pitch wheel does not bear load; When interior helical teeth cover 84 is pulled a distance to the right by the axial force from force generator 13, just create a corner between Left Drive axle 83 and right transmission shaft 85, so make pitch wheel in gear case produce load.The revolution that worm screw in force generator rotates the more, the distance that Left Drive axle 83 moves right is also larger, Left Drive axle 83 is also larger relative to the corner between right transmission shaft 85, thus in gear case, the load of pitch wheel is also larger, and now force generator needs the axial force of generation also just more and more large.When needs off-load or unloading, as long as the worm screw in force generator is rotated backward, Left Drive axle 83 is moved to the left and just can realizes.
Further, mechanical close gear test stand as above, as shown in Figures 3 and 4, described force generator 13 comprises: body 1310, arranges left end cap 132, right end cap 1313 respectively at the two ends, left and right of body 1310; Left bearing with cross roller convex symmetrical roller bearing 133, shaft coupling 1315, right bearing with cross roller convex symmetrical roller bearing 134, movable axle bearing 135, worm gear 136, screw rod 1316 is provided with in the cavity formed by body 1310, left end cap 132, right end cap 1313; Connected by shaft coupling 1315 between described left bearing with cross roller convex symmetrical roller bearing 133, right bearing with cross roller convex symmetrical roller bearing 134, the left end of left bearing with cross roller convex symmetrical roller bearing 133 is connected with turning axle 131, and the end of turning axle 131 is fixedly connected with (see Fig. 1) with the 7th shaft coupling 12 by the 6th shaft coupling 9 with the pull bar 811 of interior helical teeth loader 8 through behind the center of left end cap 132; Described right bearing with cross roller convex symmetrical roller bearing 134 is fixedly connected with movable axle bearing 135, and movable axle bearing 135 is fixedly connected with one end of screw rod 1316, worm gear 136 be socketed on screw rod 1316, the below of worm gear 136 is engaged with worm screw 1314; Left single-row garden taper roller bearing 139, right single-row garden taper roller bearing 138 is respectively arranged with in the left and right sides of worm gear 136, between the single-row garden in the right side of worm gear 136 and right side taper roller bearing 138, be provided with nut 1311, between the single-row garden in the left side of worm gear 136 and left side taper roller bearing 139, be provided with rotating nut 137.
The course of work of force generator
When driving worm screw 1314 to rotate with handwheel or spanner etc., worm gear 136 is rotated together with rotating nut 137.Because screw rod 1316 and movable axle bearing 135 have been coupled to one, but movable axle bearing 135 can not be rotated by the restriction of guider screw, can only move axially.Therefore when worm gear 136 driven rotary nut 137 rotates, screw rod 1316 is moved axially, screw rod 1316 moves axially and just drives movable axle bearing 135 to axially move (moving left and right), and movable axle bearing 135 axially moves and just drives right bearing with cross roller convex symmetrical roller bearing 134, shaft coupling 1315, left bearing with cross roller convex symmetrical roller bearing 133, turning axle 131 to take turns doing axially-movable; Turning axle 131 is connected with the pull bar 811 of interior helical teeth loader 8 by the 6th shaft coupling 9, the 7th shaft coupling 12 (as shown in Figure 1), thus the right transmission shaft 85 of helical teeth loader 8 axially moves in driving, also the pull bar 811 namely in internal helical teeth loader 8 produces pulling force or thrust, thus tested gear is loaded or off-load.Because the pull bar in loader rotates together with Left Drive axle, right transmission shaft, therefore the turning axle 131 in force generator also rotates together.
The most outstanding feature of charger is the hydraulic system that instead of hydraulic loading device with force generator.Therefore it is except possessing the advantage of hydraulic loading device, if start under zero load, also can start under a load, easy to operate, can on-stream loading or arbitrarily outside adjustment load etc., it is little that it also has hydraulic loading device volume, compact conformation, can produce very large loading moment by very little power.Because the self-locking property of force generator is fine, therefore load reliable, stable.Not difficult at manufacture view yet.This charger can be used for the product testing of cogwheel gearing, also can be used as the torture test of mated gear.
Interior helical teeth cover 84 is key components, should select suitable parameter during design, wherein particularly helixangleβ, modulus m
n, tooth number Z and helical teeth end face calibration garden diameter d
fselection should be suitable.We always wish to obtain larger loading moment by less axial force.When loading moment one timing, β is less, the diameter d in helical teeth end face calibration garden
flarger, then required axial force is just less.Therefore, in designing during helical teeth loader, when radial dimension allows, d should be made as far as possible
flarger.β chooses, should consider comprehensively, should left bearing with cross roller convex symmetrical roller bearing 133 in left bearing with cross roller convex symmetrical roller bearing 89, right bearing with cross roller convex symmetrical roller bearing 81 and the force generator (Fig. 3) in interior helical teeth loader, right bearing with cross roller convex symmetrical roller bearing 134 axial force allowed to bear prerequisite under, β should select slightly larger.From test effect, it is more suitable generally to get between β=18 ° ~ 25 °.Modulus m
nshould not be too large, otherwise processing will be difficult, generally get m
n≤ 5 millimeters.Tooth number Z should be more as far as possible, because the number of teeth is the more, the strength that the flank of tooth of each tooth bears will be smaller, therefore, from the increase number of teeth, and m
nalso should obtain suitable less.
Last it is noted that above embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (3)
1. a mechanical close gear test stand, it is characterized in that, comprising: motor (1), tested gear case (3), accompany examination gear case (10), elastic shaft (11), force generator (13), load (14); Be in transmission connection by the first shaft coupling (2) between the top cog of described motor (1) and tested gear case (3), the bottom cog of described tested gear case (3) is in transmission connection with load (14) by the second shaft coupling (18), the 3rd shaft coupling (16), the 4th shaft coupling (15); Rotating shaft between the bottom cog and the second shaft coupling (18) of tested gear case (3) is provided with the first torque rotary speed sensor (17);
Described tested gear case (3) and accompanying tries to be in transmission connection by 5-linked axial organ (4), the first joint (6), elastic shaft (11), the second joint (7), the 6th shaft coupling (9) between gear case (10); Rotation axis between 5-linked axial organ (4) and the first joint (6) is provided with the second torque rotary speed sensor (5); Rotation axis between second joint (7) and the 6th shaft coupling (9) is provided with interior helical teeth loader (8); Accompany between examination gear case (10) and force generator (13) and be in transmission connection by the 7th shaft coupling (12).
2. mechanical close gear test stand according to claim 1, it is characterized in that, described interior helical teeth loader (8) comprising: body (812), left end cap (82), right end cap (86) are set respectively at the two ends, left and right of body (812), in the cavity formed by body (812), left end cap (82), right end cap (86), are provided with Left Drive axle (83), right transmission shaft (85), interior helical teeth cover (84), pull bar (811); Described right transmission shaft (85) is socketed on pull bar (811), the left end of pull bar (811) inserts after in Left Drive axle (83) and is fixedly connected with it, between described Left Drive axle (83) and interior helical teeth cover (84) by four block teeth of respective end face and bolt and nut castellated connect as one; Left single-row radial ball bearing (87), right single-row radial ball bearing (88) is respectively arranged with at the two ends, left and right of Left Drive axle (83); Left bearing with cross roller convex symmetrical roller bearing (89), right bearing with cross roller convex symmetrical roller bearing (81) is respectively arranged with at the two ends, left and right of interior helical teeth cover (84); Left Drive axle (83) two ends, left and right be respectively arranged with left single-row garden taper roller bearing (810), right single-row garden taper roller bearing (813).
3. mechanical close gear test stand according to claim 2, it is characterized in that, described force generator (13) comprising: body (1310), arranges left end cap (132), right end cap (1313) at the two ends, left and right of body (1310) respectively; Left bearing with cross roller convex symmetrical roller bearing (133), shaft coupling (1315), right bearing with cross roller convex symmetrical roller bearing (134), movable axle bearing (135), worm gear (136), screw rod (1316) is provided with in the cavity formed by body (1310), left end cap (132), right end cap (1313); Connected by shaft coupling (1315) between described left bearing with cross roller convex symmetrical roller bearing (133), right bearing with cross roller convex symmetrical roller bearing (134), the left end of left bearing with cross roller convex symmetrical roller bearing (133) is connected with turning axle (131), and the end of turning axle (131) is fixedly connected with the 7th shaft coupling (12) by the 6th shaft coupling (9) with the pull bar (811) of interior helical teeth loader (8) through behind the center of left end cap (132); Described right bearing with cross roller convex symmetrical roller bearing (134) is fixedly connected with movable axle bearing (135), movable axle bearing (135) is fixedly connected with one end of screw rod (1316), worm gear (136) be socketed on screw rod (1316), the below of worm gear (136) is engaged with worm screw (1314); Left single-row garden taper roller bearing (139), right single-row garden taper roller bearing (138) is respectively arranged with in the left and right sides of worm gear (136), between the right side of worm gear (136) and the right side single-row garden taper roller bearing (138), be provided with nut (1311), between the left side of worm gear (136) and a left side single-row garden taper roller bearing (139), be provided with rotating nut (137).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520161755.XU CN204535983U (en) | 2015-03-23 | 2015-03-23 | Mechanical close gear test stand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520161755.XU CN204535983U (en) | 2015-03-23 | 2015-03-23 | Mechanical close gear test stand |
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| Publication Number | Publication Date |
|---|---|
| CN204535983U true CN204535983U (en) | 2015-08-05 |
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ID=53749972
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520161755.XU Expired - Fee Related CN204535983U (en) | 2015-03-23 | 2015-03-23 | Mechanical close gear test stand |
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| CN (1) | CN204535983U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402142A (en) * | 2016-11-30 | 2017-02-15 | 盐城工学院 | Split transmission connecting rod |
| CN107621366A (en) * | 2017-08-15 | 2018-01-23 | 中南大学 | A kind of bevel gear mechanical close formula testing stand |
| CN108122470A (en) * | 2017-12-10 | 2018-06-05 | 成都中良川工科技有限公司 | A kind of rote teaching comprehensive control experiment porch |
| CN108318246A (en) * | 2018-01-29 | 2018-07-24 | 河南科技大学 | One kind closing power bevel gear durability test device |
| CN108982100A (en) * | 2018-07-16 | 2018-12-11 | 东北大学 | A kind of power flow mechanical close formula manual automotive gearboxes experimental bench |
| CN109084979A (en) * | 2018-10-16 | 2018-12-25 | 济南大学 | The plastic gear wear-out life testing machine of single support self compensation loading system |
| CN110455529A (en) * | 2019-09-12 | 2019-11-15 | 河北工业大学 | A kind of Power close type gear test stand |
| CN114279702A (en) * | 2021-11-18 | 2022-04-05 | 太原重工轨道交通设备有限公司 | Load test device for gear transmission system of rail engineering vehicle |
-
2015
- 2015-03-23 CN CN201520161755.XU patent/CN204535983U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402142A (en) * | 2016-11-30 | 2017-02-15 | 盐城工学院 | Split transmission connecting rod |
| CN107621366A (en) * | 2017-08-15 | 2018-01-23 | 中南大学 | A kind of bevel gear mechanical close formula testing stand |
| CN107621366B (en) * | 2017-08-15 | 2019-02-12 | 中南大学 | A kind of bevel gear mechanical close formula testing stand |
| CN108122470A (en) * | 2017-12-10 | 2018-06-05 | 成都中良川工科技有限公司 | A kind of rote teaching comprehensive control experiment porch |
| CN108122470B (en) * | 2017-12-10 | 2020-04-07 | 成都中良川工科技有限公司 | Comprehensive measurement and control experiment platform for mechanical teaching |
| CN108318246A (en) * | 2018-01-29 | 2018-07-24 | 河南科技大学 | One kind closing power bevel gear durability test device |
| CN108982100A (en) * | 2018-07-16 | 2018-12-11 | 东北大学 | A kind of power flow mechanical close formula manual automotive gearboxes experimental bench |
| CN109084979A (en) * | 2018-10-16 | 2018-12-25 | 济南大学 | The plastic gear wear-out life testing machine of single support self compensation loading system |
| CN110455529A (en) * | 2019-09-12 | 2019-11-15 | 河北工业大学 | A kind of Power close type gear test stand |
| CN114279702A (en) * | 2021-11-18 | 2022-04-05 | 太原重工轨道交通设备有限公司 | Load test device for gear transmission system of rail engineering vehicle |
| CN114279702B (en) * | 2021-11-18 | 2024-04-16 | 太原重工轨道交通设备有限公司 | Load test device for gear transmission system of track engineering vehicle |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Zhong Bo Document name: Notification of Termination of Patent Right |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150805 Termination date: 20160323 |