CN102777574A - Reducer and upper box thereof - Google Patents
Reducer and upper box thereof Download PDFInfo
- Publication number
- CN102777574A CN102777574A CN2012102815811A CN201210281581A CN102777574A CN 102777574 A CN102777574 A CN 102777574A CN 2012102815811 A CN2012102815811 A CN 2012102815811A CN 201210281581 A CN201210281581 A CN 201210281581A CN 102777574 A CN102777574 A CN 102777574A
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- upper box
- oil
- oil sac
- side oil
- sac
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- 239000003638 chemical reducing agent Substances 0.000 title claims abstract description 71
- 239000003921 oil Substances 0.000 abstract description 228
- 238000001816 cooling Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 11
- 239000010687 lubricating oil Substances 0.000 abstract description 5
- 230000001050 lubricating effect Effects 0.000 abstract 2
- 239000000314 lubricant Substances 0.000 description 53
- 230000005540 biological transmission Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
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Abstract
The invention provides an upper box of a reducer, wherein a first oil pocket and a second oil pocket are respectively arranged on two inner side walls in a width direction of the upper box; at least one of two inner side walls in a length direction of the upper box is provided with a side oil pocket; and a side oil way communicated with a bearing seat of the upper box. Lubricating oil is collected through the first oil pocket, the second oil pocket and the newly-arranged side oil pocket so as to increase collection and utilization amount of lubricating oil; and oil is conveyed to position of the bearing seat through the side oil way communicated with the bearing seat arranged on the upper box so as to improve lubricating and cooling effects at the position of the bearing seat. Particularly, compared with the side oil pocket arranged on only one side, two side walls in the length direction of the upper box are provided with side oil pockets so as to further increase collection amount of lubricating oil, and improve lubricating and cooling effects at the position of the bearing seat on the reducer. A reducer with the upper box further is provided by the invention.
Description
Technical field
The present invention relates to the power transmission device technical field, more particularly, relate to a kind of speed reducer and upper box thereof.
Background technique
W1 series speed reducer is that pump is used speed reducer, has 1 grade of drive mechanism of parallel axes, and the ratio coverage of its transmission is 1.25-5.6, so the high speed shaft of speed reducer and lower velocity shaft all have rotational speed faster.Produced more heat when the bearing rotational speed makes speed reducer work faster.Speed reducer is when work, and to the bearing cooling, the bearing place need provide sufficient lubricating oil for better, gives bearing lubrication on the one hand through lubricant oil, also can faster heat be taken away simultaneously.
The box house two side shaft holders top of speed reducer is provided with oil sac, is equipped with the oil circuit of connection between oil sac and the bearing outer ring, so just can compile the lubricant oil that splashes that oil sac is collected and deliver to the bearing place, for bearing provides better lubricated and heat radiation.
The position of oil sac is arranged on the tank wall of both sides at bearing support place in the speed reducer; Therefore speed reducer is in rotation process; Some lubricant oil can be dropped on after splashing on the oil sac on the tank wall on high speed shaft or the lower velocity shaft axle; The oil mass that makes oil sac collect is sufficient inadequately, can not fully realize the collection to the lubricant oil that splashes.
Therefore, how improving the collecting amount of lubricant oil in the speed reducer, better to be that bearing provides lubricated and heat radiation, is present those skilled in the art's problem demanding prompt solution.
Summary of the invention
In view of this, the invention provides a kind of upper box of speed reducer, realize improving the collecting amount of lubricant oil in the speed reducer, better be that bearing provides lubricated and dispels the heat; The present invention also provides a kind of speed reducer with above-mentioned upper box.
In order to achieve the above object, the present invention provides following technological scheme:
A kind of upper box of speed reducer; Be respectively arranged with first oil sac and second oil sac on two madial walls of its width direction; At least one side of two madial walls of said upper box length direction is provided with the side oil sac, is provided with the side oil circuit that communicates with the bearing support of said upper box in it.
Preferably, in above-mentioned upper box, the position of said side oil sac is higher than the position of said first oil sac.
Preferably, in above-mentioned upper box, said side oil circuit is inner for being arranged on said side oil sac, and the oil circuit that is connected with said first oil sac.
Preferably, in above-mentioned upper box, said side oil circuit is two, and it is the inside that all is arranged on said side oil sac, and the first side oil circuit that is connected with said first oil sac and said second oil sac respectively and the second side oil circuit.
Preferably, in above-mentioned upper box, the medium position of said side oil sac between the top of said first oil sac and said upper box.
Preferably, in above-mentioned upper box, said side oil sac is two.
Preferably, in above-mentioned upper box, two said side oil sacs are symmetricly set on two madial walls on the said upper box length direction.
Preferably, in above-mentioned upper box, the two ends of said side oil sac extend to respectively with said upper box width direction on two madial walls link to each other.
Preferably, in above-mentioned upper box, said side oil sac is identical at its sectional shape radially with said first oil sac in its cross section radially.
A kind of speed reducer comprises that cooperating upper box and the lower box of installing, said upper box is the upper box like above-mentioned any described speed reducer.
Speed reducer upper box provided by the invention; On two madial walls of its width direction, be respectively arranged with first oil sac and second oil sac; On two madial walls of upper box length direction; The madial wall of at least one side is provided with the side oil sac, is provided with the side oil circuit that communicates with the bearing support of upper box in the side oil sac.Speed reducer in the course of the work; The lubricant oil that splashes along with the rotation of speed reducer internal gear in the time of on being splashed to two madial walls of upper box length direction, is collected in the side oil sac along the oil droplet of landing on the madial wall of upper box; And the side oil circuit that communicates with bearing support that on it, is provided with is carried the bearing support position is lubricated and cools off; Through first oil sac and second oil sac, and newly-installed side oil sac, can more effective realization to the collection of lubricant oil in the speed reducer working procedure; And improved the collection utilization of lubricant oil, thereby improved the lubricated and cooling effect at bearing support place through the transmission of oil droplet.Special, when on the two side of the length direction of upper box the side oil sac being set all, the side oil sac that it has only a side has further improved the collecting amount of lubricant oil, has strengthened the lubricated and cooling effect at speed reducer upper bearing bracket place.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technological scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the front view of speed reducer provided by the invention;
Fig. 2 is the plan view of Fig. 1;
Fig. 3 is the sectional view of A-A direction among Fig. 1;
Fig. 4 is the sectional view of B-B direction among Fig. 2;
Fig. 5 is the sectional view of C-C direction among Fig. 4.
Embodiment
The invention discloses a kind of upper box of speed reducer, improved the collecting amount of lubricant oil in the speed reducer, realized better providing lubricated and heat radiation for bearing; The present invention also provides a kind of speed reducer with above-mentioned upper box.
To combine the accompanying drawing in the embodiment of the invention below, the technological scheme in the embodiment of the invention is carried out clear, complete description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiments.Based on embodiments of the invention, those of ordinary skills are not making the every other embodiment who is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Like Fig. 1-shown in Figure 3, Fig. 1 is the front view of speed reducer provided by the invention; Fig. 2 is the plan view of Fig. 1; Fig. 3 is the sectional view of A-A direction among Fig. 1.
In the upper box of speed reducer provided by the invention; Be respectively arranged with first oil sac 2 and second oil sac 3 on two madial walls of the width direction of upper box 1; At least one side of two madial walls of upper box 1 length direction is provided with the side oil sac, is provided with the side oil circuit that communicates with the bearing support of upper box in the side oil sac.
Speed reducer in the course of the work; The lubricant oil that splashes along with the rotation of speed reducer internal gear in the time of on being splashed to two madial walls of upper box length direction, is collected in the side oil sac along the oil droplet of landing on the madial wall of upper box; And the side oil circuit that communicates with bearing support that on it, is provided with is carried the bearing support position is lubricated and cools off; Through first oil sac 2 and second oil sac 3, and newly-installed side oil sac, can more effective realization to the collection of lubricant oil in the speed reducer working procedure; And improved the collection utilization of lubricant oil, thereby improved the lubricated and cooling effect at bearing support place through the transmission of oil droplet.
Special, when on the two side of the length direction of upper box the side oil sac being set all, the side oil sac that it has only a side has further improved the collecting amount of lubricant oil, has strengthened the lubricated and cooling effect at speed reducer upper bearing bracket place.
In the present invention's one specific embodiment, the position of side oil sac is higher than the position of first oil sac 2.Its inner gear collection of lubricant oil of having splashed when first oil sac 2 that is provided with on the width direction of upper box and second oil sac 3 can be realized speed reducer worked; First oil sac 2 and second oil sac 3 are provided with on the width direction of upper box; Can know the time; Width direction is the installation side of bearing support, and the lubricant oil of therefore being collected by first oil sac 2 and second oil sac 3 can be delivered directly to the bearing support position through the oil circuit on it.
And the side oil sac is arranged on the length direction of upper box; Make that the mounting point of side oil sac distance between bearing seat is far away; In order to make the lubricant oil of collecting on the side oil sac to be transported to smoothly on the bearing support; It is poor to need to form bigger oil pressure between side oil sac and the bearing support, thereby is beneficial to the transmission of the lubricant oil of collecting on the realization offside oil sac.Be higher than first oil sac 2 through the position that the side oil sac is set, make that the formation certain height is poor between side oil sac and the bearing support, poor with this oil pressure that increases between side oil sac and the bearing support, guaranteed the transmission of lubricant oil between side oil sac and the bearing support.
Preferably among the embodiment, the side oil circuit is the inside that is arranged on the side oil sac, and the oil circuit that is connected with first oil sac 2 at present embodiment one.The side oil circuit is set to directly be communicated with the path of the side oil sac and first oil sac 2; Utilize the position of side oil sac to be higher than the design of first oil sac 2 simultaneously; Therefore when collecting lubricant oil in the side oil sac; Lubricant oil can be transported to through the oil circuit that is provided with between the two in first oil sac 2, and then through first oil circuit that is provided with on first oil sac 2 and first oil sac 2 lubricant oil is delivered to the bearing support position.
Through the oil circuit that is communicated with the side oil sac and first oil sac 2 is set; Avoid on the side oil sac, offering separately the side oil circuit that is communicated with itself and bearing support, thereby avoided the madial wall of upper box 1 width direction is further processed, reduced the manufacture difficulty of side oil sac; Guaranteed the structural strength of upper box; And reached further collection to lubricant oil in the speed reducer, and utilize the lubricant oil of collecting, improve the lubricated and cooling effect of bearing in reduction gears seat.
Like Fig. 4 and shown in Figure 5, Fig. 4 is the sectional view of B-B direction among Fig. 2; Fig. 5 is the sectional view of C-C direction among Fig. 4.
In present embodiment one preferred version, the side oil circuit is two, comprises the inside of the side oil sac that the first side oil circuit 6 and 7, two side oil circuits of the second side oil circuit all are provided with, and is connected with first oil sac 2 and second oil sac 3 respectively.It is two that the side oil circuit is set; Make the lubricant oil of collecting by the side oil sac to be transported to first oil sac 2 and second oil sac 3 by shunting; And then be transported to the bearing support place of the first oil sac side and the second oil sac side; Lubricant oil by the side oil sac is collected has been realized the lubricated and refrigerating function to the bearing support of speed reducer width direction both sides, can improve the work conformity of the bearing support of speed reducer both sides.
Certainly; The design of the first side oil circuit 6 and the second side oil circuit 7 can be adjusted according to speed reducer two side shaft holders carrying and working state at work; Can regulate the oil mass that flows into the lubricant oil in first oil sac 2 and second oil sac 3 through the oil circuit size that the first different side oil circuits 6 and the second side oil circuit 7 are set, make speed reducer is passed through the optimization of the fine setting realization of lubricant oil recycling amount to the speed reducer working state.It is understandable that; The lubricant oil that speed reducer inside is collected by oil sac is the sub-fraction of required lubricant oil in the speed reducer proper functioning; Therefore can be with the first side oil circuit 6 and the second side oil circuit 7 symmetric arrangement in placement process; Improve bearing lubricated and cooling effect in, reduce the difficulty of processing of speed reducer upper box.
In the present invention's one specific embodiment; The medium position of side oil sac between the top of first oil sac 2 and upper box 1; The side oil sac that is arranged on the position can be realized the set positions between above-mentioned side oil sac and first oil sac 2 and second oil sac 3, has the beneficial effect that above-mentioned side oil sac position has in being provided with.Need to prove that here the rotation of speed reducer internal gear needs enough rotation spaces, the interpolation of side oil sac has taken the space that upper box 1 internal gear rotates.
Through the medium position that the side oil sac is arranged on the top of first oil sac 2 and upper box 1 is set, it makes the gear rotation space of the speed reducer that upper box 1 is inner can not receive the influence that the side oil sac adds, and has guaranteed the carrying out of the proper functioning of speed reducer.
Preferably among the embodiment, the side oil sac is two, comprises the first side oil sac 4 and the second side oil sac 5 in the present invention one.Speed reducer in the course of the work; The influence of the lubricant oil that two madial walls of its length direction all can be splash; Therefore in above-mentioned two positions the side oil sac is set all, makes the lubricant oil that splashes by speed reducer can access maximized collection, and utilize the lubricant oil of collecting; Secondary is transported to the position of the bearing support of speed reducer, has improved the lubricated and cooling effect of speed reducer.
At present embodiment one preferably among the embodiment; Being arranged on two madial walls on the upper box length direction of two side oil sac symmetries; The design of symmetry is easy to realize the setting to the inboard oil sac of speed reducer upper box position; Avoid increasing the difficulty of processing of speed reducer upper box simultaneously, be easy to realize the manufacturing of upper box upside oil sac.
The speed reducer internal gear is in rotation process, and the lubricant oil that is splash appears at the arbitrary position of upper box 1 width direction along the direction of gear shaft.The two ends that the side oil sac is set extend to respectively with the upper box width direction on two madial walls link to each other; But make and to be splashed to the position that lubricant oil major part on the upper box madial wall is collected into side oil sac and first oil sac 2, second oil sac 3 by the speed reducer internal gear; Thereby, be easy to realize increasing the collecting amount of oil sac, and then the lubricant oil secondary be transported to the position of bearing support fully lubricant oil; When lubricant oil is made full use of, further guaranteed the cooling and the lubrication effect at bearing support place.
When the side oil sac is collected at the lubricant oil that speed reducer is splashed; Receive on the one hand and be splashed on upper box 1 madial wall and the lubricant oil of landing; On the other hand; The side oil sac also will receive the lubricant oil that speed reducer is directly splash in the course of the work simultaneously, therefore needs the side oil sac to have open structure, to be easy to realize the collection to the lubricant oil that splashes in the speed reducer.
Particularly, it is identical at its sectional shape radially with first oil sac 2 in its cross section radially the side oil sac to be set.The side oil sac is the device of the lubricant oil that splashes along the collection of the madial wall setting of upper box; It has long length; And be set to integrative-structure with the madial wall of upper box; It shows as the groove structure that lubricant oil is collected from length; First oil sac 2 in the existing technology in the upper box 1 and second oil sac 3 can realize that the bearing place is collected and be delivered to lubricant oil proceeds lubricated and cooling work, and therefore the side oil sac is set is that the cross section structure identical with the cross section of first oil sac also can reach the effect that lubricant oil is collected.
Particularly; Because the side oil sac is compared to first oil sac 2 design attitude higher with second oil sac 3, so it is when collecting lubricant oil, and splashing to the interior lubricant oil of side oil sac needs the certain sputtering height; Therefore still can cause directly splashing down of a part of lubricant oil; For the lubricant oil that collection as much as possible is splashed, the angle of inclination at the edge of side oil sac can be set, satisfy under the situation with groove structure of collecting lubricant oil at it; While can make through the angle of inclination at edge and collect more lubricating oil, thereby can further improve the recycling rate of waterused of lubricant oil.
Based on the upper box of the speed reducer that provides in the foregoing description, the present invention also provides a kind of speed reducer, comprises that upper box that upper box that cooperate to install and this speed reducer of lower box are provided with is the upper box of the speed reducer that provides in the foregoing description.
Because this speed reducer has adopted the speed reducer upper box of the foregoing description, so this speed reducer please refer to the foregoing description by the beneficial effect that the speed reducer upper box brings.
To the above-mentioned explanation of the disclosed embodiments, make related domain professional and technical personnel can realize or use the present invention.Multiple modification to these embodiments will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiments shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (10)
1. the upper box of a speed reducer; Be respectively arranged with first oil sac (2) and second oil sac (3) on two madial walls of its width direction; It is characterized in that; At least one side of two madial walls of said upper box (1) length direction is provided with the side oil sac, is provided with the side oil circuit that communicates with the bearing support of said upper box (1) in it.
2. upper box according to claim 1 is characterized in that, the position of said side oil sac is higher than the position of said first oil sac (2).
3. upper box according to claim 2 is characterized in that, said side oil circuit is inner for being arranged on said side oil sac, and the oil circuit that is connected with said first oil sac (2).
4. upper box according to claim 2; It is characterized in that; Said side oil circuit is two, and it is for all being arranged on the inside of said side oil sac and the first side oil circuit (6) that is connected with said first oil sac (2) and said second oil sac (3) respectively and the second side oil circuit (7).
5. upper box according to claim 2 is characterized in that, said side oil sac is positioned at the medium position between the top of said first oil sac (1) and said upper box (1).
6. upper box according to claim 1 is characterized in that, said side oil sac is two.
7. upper box according to claim 6 is characterized in that, two said side oil sacs are symmetricly set on two madial walls on said upper box (1) length direction.
8. upper box according to claim 1 is characterized in that, the two ends of said side oil sac extend to respectively with said upper box width direction on two madial walls link to each other.
9. upper box according to claim 1 is characterized in that, said side oil sac is identical at its sectional shape radially with said first oil sac (1) in its cross section radially.
10. a speed reducer comprises cooperating upper box and the lower box of installing, and it is characterized in that said upper box is the upper box (1) like any described speed reducer among the claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210281581.1A CN102777574B (en) | 2012-08-08 | 2012-08-08 | Speed reducer and upper box thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210281581.1A CN102777574B (en) | 2012-08-08 | 2012-08-08 | Speed reducer and upper box thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102777574A true CN102777574A (en) | 2012-11-14 |
| CN102777574B CN102777574B (en) | 2015-09-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210281581.1A Active CN102777574B (en) | 2012-08-08 | 2012-08-08 | Speed reducer and upper box thereof |
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| Country | Link |
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| CN (1) | CN102777574B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104712744A (en) * | 2013-12-17 | 2015-06-17 | Sew-工业减速机(天津)有限公司 | Shell for speed reducer |
| CN104712736A (en) * | 2013-12-17 | 2015-06-17 | Sew-工业减速机(天津)有限公司 | Speed reducer with shell |
| EP3066361B1 (en) * | 2013-11-08 | 2020-08-19 | Sew-Eurodrive GmbH & Co. KG | Housing for a transmission and transmission comprising a housing |
| US11835125B2 (en) | 2013-11-08 | 2023-12-05 | Sew-Eurodrive Gmbh & Co. Kg | Gear unit having a housing |
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| EP0420478A2 (en) * | 1989-09-26 | 1991-04-03 | Delaware Capital Formation Inc. | Low flow tilting pad thrust bearing |
| DE4234905A1 (en) * | 1992-02-11 | 1993-08-12 | Desch Kg Heinrich | Planetary gearbox, clutch and brake unit for press drive - has hydrostatic lubrication to flywheel bearing and lubricating oil circulation to all moving parts |
| CN201526664U (en) * | 2009-11-13 | 2010-07-14 | 中国北车集团大同电力机车有限责任公司 | Thin oil lubrication circuit of drive gearbox of railroad rolling stock |
| CN201705903U (en) * | 2010-04-15 | 2011-01-12 | 沃德(天津)传动有限公司 | Speed reducer |
| CN202833968U (en) * | 2012-08-08 | 2013-03-27 | 沃德(天津)传动有限公司 | Speed reducer and upper box body thereof |
-
2012
- 2012-08-08 CN CN201210281581.1A patent/CN102777574B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0420478A2 (en) * | 1989-09-26 | 1991-04-03 | Delaware Capital Formation Inc. | Low flow tilting pad thrust bearing |
| DE4234905A1 (en) * | 1992-02-11 | 1993-08-12 | Desch Kg Heinrich | Planetary gearbox, clutch and brake unit for press drive - has hydrostatic lubrication to flywheel bearing and lubricating oil circulation to all moving parts |
| CN201526664U (en) * | 2009-11-13 | 2010-07-14 | 中国北车集团大同电力机车有限责任公司 | Thin oil lubrication circuit of drive gearbox of railroad rolling stock |
| CN201705903U (en) * | 2010-04-15 | 2011-01-12 | 沃德(天津)传动有限公司 | Speed reducer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3066361B1 (en) * | 2013-11-08 | 2020-08-19 | Sew-Eurodrive GmbH & Co. KG | Housing for a transmission and transmission comprising a housing |
| US11835125B2 (en) | 2013-11-08 | 2023-12-05 | Sew-Eurodrive Gmbh & Co. Kg | Gear unit having a housing |
| CN104712744A (en) * | 2013-12-17 | 2015-06-17 | Sew-工业减速机(天津)有限公司 | Shell for speed reducer |
| CN104712736A (en) * | 2013-12-17 | 2015-06-17 | Sew-工业减速机(天津)有限公司 | Speed reducer with shell |
| CN104712736B (en) * | 2013-12-17 | 2017-11-14 | Sew-工业减速机(天津)有限公司 | Decelerator with housing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102777574B (en) | 2015-09-30 |
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Address after: 300409 82 high tech Avenue, Beichen science and Technology Park, Tianjin Patentee after: WARD TRANSMISSION TECHNOLOGY (TIANJIN) Co.,Ltd. Address before: 300409 82 high tech Avenue, Beichen science and Technology Park, Tianjin Patentee before: WORLD TRANSMISSION TECHNOLOGY (TIANJIN) Co.,Ltd. |
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Denomination of invention: Reducer and its upper box Effective date of registration: 20220610 Granted publication date: 20150930 Pledgee: Bank of China Limited Tianjin Hexi sub branch Pledgor: WARD TRANSMISSION TECHNOLOGY (TIANJIN) Co.,Ltd. Registration number: Y2022120000027 |
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Date of cancellation: 20230821 Granted publication date: 20150930 Pledgee: Bank of China Limited Tianjin Hexi sub branch Pledgor: WARD TRANSMISSION TECHNOLOGY (TIANJIN) Co.,Ltd. Registration number: Y2022120000027 |
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Denomination of invention: Reducer and its upper box Effective date of registration: 20230828 Granted publication date: 20150930 Pledgee: Bank of China Limited Tianjin Hexi sub branch Pledgor: WARD TRANSMISSION TECHNOLOGY (TIANJIN) Co.,Ltd. Registration number: Y2023120000074 |