CN112879442B - Bearing assembly and oil guide rod body thereof - Google Patents
Bearing assembly and oil guide rod body thereof Download PDFInfo
- Publication number
- CN112879442B CN112879442B CN202110064694.5A CN202110064694A CN112879442B CN 112879442 B CN112879442 B CN 112879442B CN 202110064694 A CN202110064694 A CN 202110064694A CN 112879442 B CN112879442 B CN 112879442B
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- oil
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- guide rod
- rod body
- hole
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N21/00—Conduits; Junctions; Fittings for lubrication apertures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16N—LUBRICATING
- F16N2210/00—Applications
- F16N2210/14—Bearings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
A bearing assembly comprises a bearing, a bearing seat sleeved outside the bearing, a bearing end cover covering the axial end face of the bearing and an oil guide rod body; a first oil injection channel is arranged in the bearing seat, and the first oil injection channel is a through hole; the bearing end cover is provided with a second oil injection channel, and the second oil injection channel is connected between the first oil injection channel and the axial end face of the bearing; the oil guide rod body is provided with an injection hole with an opening positioned outside the bearing seat, a connecting end fixedly arranged in the first oil filling channel and an insertion end arranged in the second oil filling channel, and the injection hole is communicated with the connecting end and the insertion end; and the lubricating oil enters from the injection hole, flows to the second oil injection channel and flows to the axial end face of the bearing through the second oil injection channel. In addition, the invention also provides an oil guide rod body applied to the bearing assembly. Compared with the prior art, the bearing assembly and the oil guide rod body thereof can reduce the change of an oil way so as to reduce the increase of resistance, and are convenient for the smooth filling of lubricating oil.
Description
Technical Field
The invention relates to the technical field of bearings, in particular to a bearing assembly and an oil guide rod body thereof.
Background
The bearing is an important part in mechanical equipment, and has the functions of supporting a mechanical rotating body such as a shaft body and reducing the friction coefficient in the movement process of the mechanical rotating body so as to ensure the rotation precision of the mechanical rotating body. When the bearing works, not only rolling friction but also sliding friction occurs between all parts forming the bearing, thereby causing the abrasion of the parts, therefore, adding lubricating oil to the bearing can not only reduce the friction and the abrasion in the bearing, but also prevent rusting and corrosion and prolong the service life. But the amount of the lubricant to be added is particularly required. If the amount of the additive is too small, the bearing life is affected due to insufficient lubrication; if the amount of the additive is too large, a large resistance is generated, and the normal operation of the shaft body is affected. Therefore, in the prior art, a certain dosage of lubricating oil is generally added to the bearing at regular intervals to control the dosage, and under the condition of ensuring lubrication, normal operation of the shaft body is not affected.
Taking a jaw crusher as an example, a common jaw crusher drives an eccentric shaft to rotate by a belt pulley, and a movable jaw connected with the eccentric shaft reciprocates along with the eccentric shaft in a regular motion track and periodically moves away from or close to a fixed jaw plate, so as to crush materials between the movable jaw plate and the fixed jaw plate. However, the bearings supporting the eccentric shaft are easily worn when working under a high-strength and high-load environment for a long time, and therefore, proper addition of lubricating oil is certainly the key to ensure the normal operation of the eccentric shaft.
In the prior art, a jaw crusher is constructed as shown in fig. 1, and includes a pulley 1, an eccentric shaft 2 rotating with the pulley 1, a movable jaw 3 connected to the eccentric shaft 2, and a bearing assembly 4 supporting the eccentric shaft 2. The bearing assembly 4 comprises a bearing 5 sleeved on the eccentric shaft 2 and a bearing seat 6 for mounting the bearing 5. Wherein, the bearing seat 6 is sleeved outside the bearing 5. And an oil groove 500 communicated with the inside of the bearing 5 is arranged in the axial middle part of the outer ring of the bearing 5. Oil holes 500 are distributed on the bearing seat 6 along the circumferential direction of the bearing 5. The oil filler hole 600 communicates the outside of the bearing housing 6 with the oil groove 500. When the lubricating oil is added, the lubricating oil is injected from the oil filler hole 600, and the lubricating oil flows to the oil groove 500 along the oil filler hole 600 and enters the inside of the bearing 5 for lubrication.
However, after a period of use, due to installation errors and the like, the bearing 5 is misaligned relative to the bearing seat 6, and the oil hole 600 is no longer aligned with the oil groove 500, so that the oil path through which the lubricating oil flows is bent, the resistance is increased, and the lubricating oil is easily blocked or even cannot be filled.
Disclosure of Invention
Accordingly, an object of the present invention is to provide a bearing assembly that reduces changes in oil passages to reduce increase in resistance, thereby facilitating smooth filling of lubricating oil.
The bearing assembly adopts the following technical scheme:
a bearing assembly comprises a bearing, a bearing seat sleeved outside the bearing, a bearing end cover covering the axial end face of the bearing and an oil guide rod body; a first oil injection channel is arranged in the bearing seat, and the first oil injection channel is a through hole; the bearing end cover is provided with a second oil injection channel, and the second oil injection channel is connected between the first oil injection channel and the axial end face of the bearing; the oil guide rod body is provided with an injection hole with an opening positioned outside the bearing seat, a connecting end fixedly arranged in the first oil injection channel and an insertion end arranged in the second oil injection channel, the injection hole is communicated with the connecting end and the insertion end, and the oil guide rod body is inserted into the second oil injection channel to limit the rotation of the bearing end cover; and lubricating oil enters from the injection hole and flows to the second oil injection channel, and flows to the axial end face of the bearing through the second oil injection channel.
Compared with the prior art, the bearing assembly has the advantages that the oil guide rod body which is simultaneously inserted into the first oil injection channel and the second oil injection channel is positioned between the bearing and the bearing cover, and the rotation of the bearing end cover is limited, so that an oil way is kept unchanged, and the smooth oil injection of lubricating oil is ensured.
Further, the second oil injection channel is a groove formed in the axial end face, facing the bearing, of the bearing end cover. The oil guide rod body is inserted into the groove, so that the rotation of the bearing end cover is limited, an oil way is kept unchanged, and the smooth filling of lubricating oil is further ensured.
The oil supply device further comprises an oil supply pipe joint used for being connected with the oil supply pump; the oil supply pipe joint is arranged at an opening of one side of the first oil injection channel far away from the second oil injection channel. The connection with the oil supply pump is realized through the oil supply pipe joint, and lubricating oil is filled in the oil supply pump in a timing and quantitative mode.
Further, the device also comprises an inner through screw plug; the inner through screw plug is plugged into the first oil injection channel; the oil supply pipe joint is fixedly arranged in the inner through screw plug. The connection between the oil guide rod body and the oil supply pipe is enhanced by the internal screw plug, so that smooth filling is ensured.
Furthermore, the oil guide rod body is also provided with a supporting part connected with the outer side of the bearing seat; the supporting part is positioned at one end of the oil guide rod body far away from the inserting end; the bearing seat supports the oil guide rod body through the supporting part. The supporting part is arranged to stabilize the installation of the oil guide rod body in the first oil filling channel.
Further, the injection hole is a blind hole; the oil guide rod body is also provided with a flow guide hole communicated with the injection hole; the flow guide hole penetrates through the oil guide rod body, and the axis of the flow guide hole and the axis of the injection hole form an included angle. The guiding hole guides the lubricating oil, and normal work of the shaft body is prevented from being influenced by impact of the lubricating oil when the lubricating oil is filled.
Furthermore, the number of the oil guide rod bodies, the number of the first oil injection channels and the number of the second oil injection channels are more than two, and the oil guide rod bodies, the first oil injection channels and the second oil injection channels are distributed along the direction which is parallel to the radial direction of the bearing, so that lubricating oil is injected from different positions of the bearing, and all parts of the bearing are fully lubricated.
In addition, the invention also provides an oil guide rod body so as to be convenient for filling lubricating oil.
The technical scheme adopted by the oil guide rod body is as follows:
the oil guide rod body is provided with an injection hole, a connecting end and an insertion end, wherein an opening at one end of the injection hole is formed in the connecting end and communicated with the connecting end and the insertion end.
Compared with the prior art, the oil guide rod body can be arranged between the bearing and the bearing end cover, and an oil way for filling lubricating oil is kept unchanged, so that the condition of increasing resistance is reduced, and the operability of filling lubricating oil is improved.
Furthermore, a flow guide hole communicated with the injection hole is also arranged; the flow guide hole penetrates through the oil guide rod body, and the axis of the flow guide hole and the axis of the injection hole form an included angle. The guide holes can guide lubricating oil, and normal work of the bearing and the shaft body is prevented from being directly influenced by the guide holes.
Further, along the extending direction projection of the oil guide rod body, the cross section of the connecting end is non-circular. The oil guide rod body with a non-circular cross section at a local position can limit the rotation of the oil guide rod body around the axis and is stably connected.
For a better understanding and practice, the invention is described in detail below with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic view of a prior art jaw crusher configuration;
FIG. 2 is a schematic view of a portion of a jaw crusher in an embodiment of the present invention;
FIG. 3 is a partial enlarged view A of FIG. 2;
FIG. 4 is a schematic view of a bearing end cap according to an embodiment of the present invention;
FIG. 5 is a sectional view of an oil guide bar body according to the present invention, and a bottom view and a right side view thereof.
Detailed Description
Taking a jaw crusher as an example, the oil guide rod body is used for injecting lubricating oil into a bearing assembly of the jaw crusher and limiting the movement of a bearing end cover.
Referring to fig. 2, the jaw crusher of this embodiment includes a pulley 1, an eccentric shaft 2 rotating with the pulley 1, a movable jaw 3 connected to the eccentric shaft 2, and a bearing assembly 4. The bearing assembly 4 comprises a bearing 5 sleeved on the eccentric shaft 2, a bearing seat 6 used for mounting the bearing 5, bearing end covers 7 covering two ends of the bearing 5, and an oil guide rod body 8 inserted in the bearing seat 6 and the bearing end covers 7. The bearing seat 6 is sleeved on the outer side of the bearing 5 to support the bearing 5. The bearing end covers 7 are covered on two axial end faces of the bearing 5 and are tightly connected with the bearing seat 6, so that lubricating oil in the bearing 5 is prevented from leaking, and the axial movement of the bearing 5 is limited. The oil guide rod body 8 penetrates through the bearing end cover 7 and the bearing seat 6 and guides lubricating oil to the side surface of the bearing 5 to fill the inside of the bearing 5 with oil.
Referring to fig. 3, a first oil injection channel 61 is disposed in the bearing seat 6. The first oil injection channel 61 is a through hole, an inlet of the first oil injection channel is arranged on the outer side of the bearing seat 6, an outlet of the first oil injection channel is arranged on one side facing the bearing end cover 7, and the extending direction of the first oil injection channel is parallel to the extending direction of the oil guide rod body 8. Preferably, the first oil injection passage 61 extends in a direction radially parallel to the bearing 5.
A second oil injection channel 71 is arranged in the bearing end cover 7, and the oil guide rod body 8 is inserted into the bearing end cover 7 to limit the rotation of the oil guide rod body around the axis of the bearing 5. The second oil filling channel 71 is located between an axial end surface of one side of the bearing 5 and the bearing end cover 7, an inlet of the second oil filling channel is connected with the first oil filling channel 61, an outlet of the second oil filling channel faces the axial end surface of the bearing 5, and lubricating oil flows to the axial end surface of the bearing 5 along the second oil filling channel 71 and flows into the interior of the bearing. Preferably, the outlet of the second oil filling channel 71 is located between the outer ring and the inner ring of the bearing 5. In one embodiment, referring to fig. 4, the second oil injection channel 71 is a groove opened on a side surface of the bearing end cover 7 facing an axial end surface of the bearing 5, and the oil guide rod body 8 is inserted into the groove, preferably, the groove extends to between an inner ring and an outer ring of the bearing 5 in a direction parallel to a radial direction of the bearing 5. In addition, the second oil filling channel 71 may also be a through hole, one end of which is open and disposed on the circumferential surface of the bearing end cover 7, and the other end of which is open and disposed on the side surface of the bearing end cover 7 facing the axial end surface of the bearing 5, and the purpose of limiting the axial rotation of the bearing end cover 7 is also achieved.
Referring to fig. 5, the oil guide rod body 8 is provided with an injection hole 81 with an opening located outside the bearing seat 6, a connecting end 82 and an insertion end 83. In the extending direction of the oil guide rod body 8, the connecting end 82 is located in the first oil filling channel 61, and the inserting end 83 is located in the second oil filling channel 71. Preferably, the cross-sectional area of the connecting end 82 is larger than that of the insertion end 83 so as to facilitate insertion when projected along the extending direction of the oil guide body 8, i.e. the axial direction of the oil guide body 8. The injection hole 81 is located in the oil guide rod body 8 and the extending direction of the injection hole is parallel to the extending direction of the oil guide rod body 8. In one embodiment, the injection hole 81 is a through hole connected between the connection end 82 and the insertion end 83, and the lubrication oil entering from the connection end 82 flows through the injection hole 81 to the insertion end 83 and into the second oil filling channel 71, and flows along the second oil filling channel 71 to the axial end face of the bearing 4. In another embodiment, the injection hole 81 is a blind hole, the opening of which is disposed at the connection end 82, and the injection hole 81 is further provided with a flow guiding hole 84, the axis of which forms an included angle with the axis of the injection hole 81, preferably, the axis of the flow guiding hole 84 is perpendicular to the axis of the injection hole; the guiding hole 84 is located on one side of the injection hole 81 far from the connection end 82 and is communicated with the injection hole 81, the guiding hole 84 penetrates through the oil guiding rod body 8, and after the lubricating oil enters the injection hole 81 from the connection end 82, the lubricating oil flows out from the guiding hole 84 and flows to the second oil filling channel 71 along the insertion end 83, and then flows into the axial end face of the bearing 5, so that the impact of the lubricating oil on the bearing 5 is reduced, and the influence on the normal operation of the shaft body during oil filling is reduced. Preferably, the cross-sectional area of the insertion end 83 is smaller than the cross-sectional area of the second oil filling channel 71, and the outlet of the guiding hole 84 is located in the first oil filling channel 61, as projected along the extending direction of the oil guiding rod body 8, so as to further reduce the impact of the lubricating oil on the axial end surface of the bearing 5. Further, in one embodiment, the first oil filling channel 61 is provided with an internal thread, the connecting end 82 is provided with an external thread, and the oil guide rod body 8 is in threaded connection with the first oil filling channel 61. In another embodiment, the oil guide rod body 8 is further provided with a supporting portion 85 at an end far away from the insertion end 83, and the supporting portion 85 is connected with the outer side of the bearing seat 6; the outer contour of the supporting portion 85 is larger than the outer contour of the first oil injecting channel 61 in the extension direction projection of the oil guide rod body 8, so that the bearing seat 6 supports the oil guide rod body 8 through the supporting portion 85, and the oil guide rod body 8 is limited from moving towards the eccentric shaft 2. Preferably, the cross-sectional shapes of the connecting end 82 and the first oil filling channel 61 are non-circular when projected along the extending direction of the oil guide rod body 8, further, when projected along the extending direction of the oil guide rod body 8, the connecting end 82 is provided with two parallel side surfaces and two circular arcs connected between the two side surfaces, and the shape of the first oil filling channel 61 is matched with the connecting end 82, so that the connecting end 82 is limited to rotate around an axis parallel to the extending direction of the oil guide rod body 73 in the first oil filling channel 61.
Further, the bearing assembly 4 further includes a fuel supply pump (not shown), a fuel supply line connector 9 installed at an opening of the connection end 82, and a fuel supply line 10 connected between the fuel supply pump and the fuel supply line connector 9. Preferably, the oil supply nipple 9 is inserted into and threadedly coupled with the coupling end 82. And oil is injected regularly and quantitatively through the oil supply pump.
Further, the bearing assembly 4 further comprises an inner through plug screw 11, threads are arranged on the inner side and the outer side of the inner through plug screw 11, the inner through plug screw 11 is plugged into the connecting end 82 and is in threaded connection with the connecting end, and the oil supply pipe joint 9 is screwed into the inner through plug screw 11 so as to prevent the oil supply pipe 10 from loosening due to vibration in the working process.
Further, the number of oil guide rod bodies 8 is more than two, and the oil guide rod bodies are uniformly distributed along the radial direction parallel to the bearing 5 and inject grease into the bearing 5 from different directions.
It is particularly noted that the bearing oiling device of the invention is only suitable for adding lubricating oil to the bearings of other equipment, taking a jaw crusher as an example.
Compared with the prior art, the oil guide rod body in the bearing assembly is arranged between the bearing and the bearing end cover, so that the change of an oil path caused by the displacement between the bearing and the bearing end cover is reduced, the resistance for filling lubricating oil is less, the lubricating oil can be filled smoothly even if the bearing assembly is used for a long time, and the lubricating oil can be filled into different positions of the bearing, so that all the positions of the bearing can be fully lubricated. Furthermore, the oil guide rod body limits the rotation of the bearing end cover, and further limits the change of an oil way. Meanwhile, an oil supply pipe joint connected with the oil supply pump and an internal through screw plug provided with the oil supply pipe joint are arranged, so that the oil guide rod body is stably connected with the oil supply pump, and lubricating oil is filled regularly and quantitatively. In addition, be equipped with on the oil guide rod body and lead the oilhole, when reducing the filling lubricating oil, to bearing and axis body normal work's influence.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (8)
1. A bearing assembly, characterized by: the oil guide rod comprises a bearing, a bearing seat sleeved outside the bearing, a bearing end cover covered on the axial end face of the bearing and an oil guide rod body; a first oil injection channel is arranged in the bearing seat, and the first oil injection channel is a through hole; the bearing end cover is provided with a second oil injection channel, and the second oil injection channel is connected between the first oil injection channel and the axial end face of the bearing; the oil guide rod body is provided with an injection hole with an opening positioned at the outer side of the bearing seat, a connecting end fixedly arranged in the first oil injection channel, an insertion end and a flow guide hole which are arranged in the second oil injection channel; the cross section area of the insertion end is smaller than that of the second oil filling channel; the injection hole is a blind hole and is connected between the connecting end and the insertion end; the inserting end is inserted into the second oiling channel to limit the rotation of the bearing end cover; the flow guide hole is positioned in the first oil injection channel and communicated with the injection hole, and the axis of the flow guide hole and the axis of the injection hole form an included angle and penetrate through the oil guide rod body; and lubricating oil enters the flow guide hole from the injection hole and flows to the insertion end, flows to the second oil filling channel along the outer side surface of the insertion end and flows to the axial end surface of the bearing through the second oil filling channel.
2. The bearing assembly of claim 1, wherein: the second oil injection channel is a groove formed in the axial end face, facing the bearing, of the bearing end cover.
3. The bearing assembly of claim 2, wherein: the oil supply device also comprises an oil supply pipe joint used for being connected with the oil supply pump; the oil supply pipe joint is arranged at an opening of one side of the first oil injection channel, which is far away from the second oil injection channel.
4. The bearing assembly of claim 3, wherein: the device also comprises an inner through screw plug; the inner through screw plug is plugged into the first oil injection channel; the oil supply pipe joint is fixedly arranged in the inner through screw plug.
5. The bearing assembly of claim 2, wherein: the oil guide rod body is also provided with a supporting part connected with the outer side of the bearing seat; the supporting part is positioned at one end of the oil guide rod body far away from the inserting end; the bearing seat supports the oil guide rod body through the supporting part.
6. The bearing assembly of claim 2, wherein: the number of the oil guide rod bodies, the number of the first oil injection channels and the number of the second oil injection channels are more than two, and the oil guide rod bodies, the first oil injection channels and the second oil injection channels are uniformly distributed in a direction parallel to the radial direction of the bearing.
7. The utility model provides a lead oil rod body which characterized in that: the bearing assembly which is used in the bearing assembly comprising the bearing, the bearing seat and the bearing end cover in claim 1, wherein lubricating oil is added to the axial end face of the bearing through the bearing seat and the bearing end cover, and the oil guide rod body is provided with an injection hole, a connecting end, an insertion end and a flow guide hole; the cross-sectional area of the connecting end is larger than that of the inserting end in the projection of the axis of the oil guide rod body; the injection hole is a blind hole with an opening arranged at the connecting end and is connected between the connecting end and the insertion end; the flow guide hole is positioned at the connecting end and communicated with the injection hole, and the axis of the flow guide hole forms an included angle with the axis of the injection hole and penetrates through the oil guide rod body.
8. The oil deflector body of claim 7, wherein: and the cross section of the connecting end is non-circular in shape along the projection of the extending direction of the oil guide rod body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110064694.5A CN112879442B (en) | 2021-01-18 | 2021-01-18 | Bearing assembly and oil guide rod body thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110064694.5A CN112879442B (en) | 2021-01-18 | 2021-01-18 | Bearing assembly and oil guide rod body thereof |
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| CN112879442A CN112879442A (en) | 2021-06-01 |
| CN112879442B true CN112879442B (en) | 2022-12-30 |
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| CN202110064694.5A Active CN112879442B (en) | 2021-01-18 | 2021-01-18 | Bearing assembly and oil guide rod body thereof |
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| CN202628598U (en) * | 2012-06-12 | 2012-12-26 | 沈阳鼓风机通风设备有限责任公司 | Sealing assembly of sliding bearing pack of fan |
| CN204271801U (en) * | 2014-09-30 | 2015-04-15 | 天津市松正电动汽车技术股份有限公司 | Oiling electric motor end cap |
| CN205401455U (en) * | 2016-03-04 | 2016-07-27 | 雅孚顿（天津）石化产品有限公司 | Bearing of intelligence oil addition |
| DE102016120973A1 (en) * | 2016-11-03 | 2018-05-03 | Avl List Gmbh | Length adjustable connecting rod with a cylinder-piston unit with oil guide rod |
| CN206388738U (en) * | 2017-01-16 | 2017-08-08 | 兰州金川科力远电池有限公司 | The upper mould of cylindrical battery sealing |
| CN106884972B (en) * | 2017-03-02 | 2024-03-29 | 中车戚墅堰机车车辆工艺研究所股份有限公司 | Labyrinth sealing structure of input shaft of gear box |
| CN207750348U (en) * | 2017-11-01 | 2018-08-21 | 海盐哈特惠机械五金制品有限公司 | A kind of oiling bolt |
| CN207750111U (en) * | 2017-12-04 | 2018-08-21 | 中国航发南方工业有限公司 | Oil-deflecting cover and bearing lubrication structure with it |
| CN207935306U (en) * | 2018-01-18 | 2018-10-02 | 中国农业大学 | A kind of sealed bearing with lubricant reservoir |
| CN208817058U (en) * | 2018-08-22 | 2019-05-03 | 大唐环境产业集团股份有限公司 | A kind of visual refueling device of motor |
| CN211852524U (en) * | 2020-03-04 | 2020-11-03 | 陈健昆 | Long-acting lubricating bearing with seat |
| CN211266642U (en) * | 2020-03-17 | 2020-08-14 | 浙江尔格科技股份有限公司 | Air pump for forced air circulation of cooling system of gas transformer |
| CN212106833U (en) * | 2020-04-27 | 2020-12-08 | 温岭市慧荣机械有限公司 | Gear for automobile steering pump |
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