CN220453378U - Lubricating grease feeding device - Google Patents
Lubricating grease feeding device Download PDFInfo
- Publication number
- CN220453378U CN220453378U CN202321947192.8U CN202321947192U CN220453378U CN 220453378 U CN220453378 U CN 220453378U CN 202321947192 U CN202321947192 U CN 202321947192U CN 220453378 U CN220453378 U CN 220453378U
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- Prior art keywords
- oil
- lubricating grease
- plunger
- motor
- drum
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- 239000004519 grease Substances 0.000 title claims abstract description 166
- 230000001050 lubricating effect Effects 0.000 title claims abstract description 144
- 238000007790 scraping Methods 0.000 claims abstract description 21
- 241000883990 Flabellum Species 0.000 claims abstract description 16
- 230000007246 mechanism Effects 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 5
- 230000009467 reduction Effects 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 238000003825 pressing Methods 0.000 description 15
- 230000008901 benefit Effects 0.000 description 11
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 230000003139 buffering effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 235000014121 butter Nutrition 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Landscapes
- Details Of Reciprocating Pumps (AREA)
Abstract
The utility model relates to a lubricating grease supply device, and belongs to the field of lubricating grease supply equipment. The oil pump is installed at the top of explosion-proof casing, install the motor that drives oil pump work in the explosion-proof casing, install the lubricating grease oil drum on the feed inlet of oil pump, the top of lubricating grease oil drum adopts the shutoff of lubricating grease bung, the inside of lubricating grease oil drum is provided with the lubricating grease inner bag oil drum of interchangeable, the junction of lubricating grease oil drum and oil pump still is provided with scrapes the oily flabellum, it is connected with motor power to scrape oily flabellum. The utility model has the following beneficial effects: the lubricating grease oil drum is characterized in that an oil scraping blade is further arranged at the joint of the lubricating grease oil drum and the oil pump, the oil scraping blade is in power connection with the motor, the oil scraping blade is directly driven by the motor, lubricating grease in the lubricating grease oil drum can be accelerated to flow to a storage oil cavity of the oil pump, and air in the storage oil cavity is favorably removed.
Description
Technical Field
The utility model relates to a lubricating grease supply device, and belongs to the field of lubricating grease supply equipment.
Background
At present, when the transmission part of mineral mechanical equipment needs oiling lubrication, a manual oiling mode is generally adopted: the staff needs to carry the grease gun, butter and other articles to the mechanical equipment, and then uses the grease gun to spray the butter onto the transmission parts needing lubrication. The traditional oiling mode has the advantages of high labor intensity, low working efficiency and low working efficiency, a large amount of manpower and material resources are consumed, meanwhile, the lubricating grease is easy to pollute in the turnover process, the maintenance cost of mechanical equipment is greatly increased, and the economic benefit is reduced.
Patent application No. CN202220865394.7 discloses a mechanical lubricating grease feeding device for coal mines. Comprises a shell, an oil storage cylinder, a motor, a rotating shaft, an eccentric wheel and an oil injection pump. The top of casing is equipped with the buffering oil tank, and the top of buffering oil tank is equipped with the oil storage section of thick bamboo. The inside of casing is equipped with the motor, and the pivot is connected to the motor, and the pivot penetrates in the buffering oil tank to connect the eccentric wheel. One side of the buffer oil tank is provided with an oil injection pump, and an oil inlet pipe of the oil injection pump penetrates into the buffer oil tank. An oil injection rod is inserted in the oil inlet pipe, and an oil injection hole is formed in the oil inlet pipe. The periphery of the oil inlet pipe is sleeved with a return spring, and a spring baffle plate is arranged on the oil injection rod. The inside of the oil storage cylinder is provided with a pressing oil plate, a pressing oil spring is arranged between the pressing oil plate and the top of the oil storage cylinder, and the bottom of the oil storage cylinder is provided with an oil delivery port. The mechanical lubricating grease supply device for the coal mine has the advantages of reasonable design and ingenious structure, can realize mechanized oil injection, has higher working efficiency, can effectively reduce the maintenance cost of equipment, and improves the economic benefit.
Although the above patent can realize the lubricating grease supply function, the prior art has incomplete consideration and the following disadvantages: the lack of the oil scraping fan blade can not accelerate the flow of the lubricating grease in the lubricating grease oil barrel to the oil storage cavity of the oil pump, which is not beneficial to the removal of air in the oil storage cavity. In addition, the lubricating grease liner oil drum can not be replaced.
What need is urgent is a lubricating grease feeding device, lubricating grease barrel still is provided with the scraping oil flabellum with the junction of oil pump, scraping oil flabellum and motor power connection, scraping oil flabellum adopts motor direct drive, can accelerate the storage oil pocket of lubricating grease flow direction oil pump in the lubricating grease barrel, does benefit to the clearance and stores the intracavity air. The lubricating grease inner container oil drum can be directly replaced and repeatedly used.
Disclosure of Invention
In order to solve one of the above problems, according to the above shortcomings in the prior art, the present utility model aims to solve the technical problems: how to realize the junction of lubricating grease oil drum and oil pump still is provided with scrapes the oil flabellum, it is connected with motor power to scrape the oil flabellum, it adopts motor direct drive to scrape the oil flabellum, can accelerate the lubricating grease flow direction oil pump's in the lubricating grease oil drum storage oil pocket, does benefit to and clears away the air in the storage oil pocket. The lubricating grease inner container oil drum can be directly replaced and repeatedly used, so that the lubricating grease supply device is provided.
The lubricating grease supply device comprises an explosion-proof shell and is characterized in that: the oil pump is installed at the top of explosion-proof casing, install the motor that drives oil pump work in the explosion-proof casing, install the lubricating grease oil drum on the feed inlet of oil pump, the top of lubricating grease oil drum adopts the shutoff of lubricating grease bung, the inside of lubricating grease oil drum is provided with the lubricating grease inner bag oil drum of interchangeable, the junction of lubricating grease oil drum and oil pump still is provided with scrapes the oil flabellum, it is connected with motor power to scrape the oil flabellum, it adopts motor direct drive to scrape the oil flabellum, can accelerate the storage oil pocket of lubricating grease flow direction oil pump in the lubricating grease oil drum, does benefit to the scavenge and stores the oil pocket internal air. The lubricating grease inner container oil drum can be directly replaced and repeatedly used.
Preferably, the lubricating grease is filled into the lubricating grease inner container oil barrel, and then the oil pressing device is placed into the inner upper part of the lubricating grease inner container oil barrel, so that the self weight of the oil pressing device is utilized to facilitate the lubricating grease in the lubricating grease inner container oil barrel to flow to the oil storage cavity of the oil pump.
Preferably, the oil pump is including the pump body that has the storage oil pocket, and the top and the grease oil drum of pump body are linked together, grease oil drum provides grease for the oil pump, the upper surface at explosion-proof housing is fixed to the bottom of pump body, the pump body embeds there is the extension axle, the upper end and the scraping oil flabellum of extension axle are connected, the bottom of extension axle runs through the power take off shaft transmission connection of pump body and motor, install plunger mechanism on the middle part lateral wall of pump body, the middle part of extension axle is provided with the eccentric bearing of drive plunger mechanism. And the plunger mechanism is driven by a motor, and the plunger mechanism pumps out the lubricating grease in the oil storage cavity of the pump body to a position needing to be filled with the lubricating grease through an oil outlet of the plunger device.
Preferably, the plunger mechanism is of an existing structure and comprises a plunger sleeve with an inner cavity and an oil inlet, a return spring and a plunger, the plunger sleeve is fixed on the outer wall of the pump body, one end of the plunger is butted with the eccentric bearing, the other end of the plunger is inserted into the inner cavity of the plunger sleeve, two ends of the return spring are respectively connected to the outer walls of the plunger and the plunger sleeve, the thrust for driving the plunger to move out of the plunger sleeve is provided, and a one-way valve for controlling the flow direction is arranged at an oil outlet of the plunger sleeve.
The oil pump continues to drive the extension shaft to drive the eccentric bearing to rotate, when the eccentric bearing rotates to the limit position close to the plunger sleeve, the plunger is pushed out of the plunger sleeve under the action of the reset spring, the inner cavity of the plunger sleeve forms negative pressure, the oil inlet is communicated with the inner cavity of the plunger sleeve and the oil storage cavity, grease in the oil storage cavity is sucked into the inner cavity of the plunger sleeve, the oil pump continues to drive the extension shaft to drive the eccentric bearing to rotate, and when the eccentric bearing rotates to the limit position close to the plunger sleeve, the plunger is inserted into the plunger sleeve, and grease in the plunger sleeve is extruded and discharged through the outlet of the plunger sleeve while the oil inlet is plugged. Under the cooperation of the eccentric bearing and the reset spring, the plunger is driven to reciprocate in the plunger sleeve, and the eccentric bearing continuously rotates to realize that the oil pump continuously conveys lubricating grease to a lubricating system of mechanical equipment.
Preferably, the bottom of the lubricating grease inner container oil drum is communicated with the pump body through an oil feeding hole.
Preferably, a power switch for controlling the motor to be started or stopped is also arranged on the outer wall of the explosion-proof shell.
Preferably, the motor is a worm gear direct current gear motor, and when the motor works in forward rotation, the worm is driven by the motor to drive the worm to rotate, so that a speed reduction effect is realized, and reverse rotation is avoided.
Preferably, the lubricating grease barrel cover is connected with the lubricating grease barrel through a hasp, so that the lubricating grease barrel cover can be opened and closed rapidly.
Compared with the prior art, the utility model has the following beneficial effects:
according to the lubricating grease supply device, the connecting part of the lubricating grease oil barrel and the oil pump is further provided with the oil scraping blade, the oil scraping blade is in power connection with the motor, and the oil scraping blade is directly driven by the motor, so that the flow of lubricating grease in the lubricating grease oil barrel to the oil storage cavity of the oil pump can be accelerated, and the air in the oil storage cavity can be cleared.
The lubricating grease supply device provided by the utility model has the advantages that the lubricating grease inner container oil drum can be directly and quickly replaced and repeatedly used, and is matched with the lubricating grease drum cover capable of being quickly opened and closed, the lubricating grease drum cover is quickly and conveniently taken out of the oil pressing device after being opened, the lubricating grease inner container oil drum preloaded with lubricating grease is quickly filled into the lubricating grease oil drum, and finally the oil pressing device and the lubricating grease drum cover are refilled, so that the quick clean addition of lubricating grease is realized.
According to the lubricating grease supply device, the plunger is driven to reciprocate in the plunger sleeve under the cooperation of the eccentric bearing and the reset spring, and the eccentric bearing continuously rotates to realize that the oil pump continuously conveys lubricating grease into a lubricating system of mechanical equipment, so that the lubricating grease supply device is convenient to adjust.
According to the lubricating grease supply device, the oil pressing device is arranged in the lubricating grease inner container oil drum, lubricating grease is firstly filled into the lubricating grease inner container oil drum, then the oil pressing device is placed in the upper portion of the lubricating grease inner container oil drum, and the self weight of the oil pressing device is utilized, so that the lubricating grease in the lubricating grease inner container oil drum can flow to the oil storage cavity of the oil pump.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
FIG. 1 is a schematic view of the external structure of the present utility model;
FIG. 2 is a schematic diagram of the internal structure of the present utility model;
FIG. 3 is a schematic diagram of the internal structure of the second embodiment of the present utility model;
FIG. 4 is a partial enlarged view at A;
in the figure: 1. explosion-proof casing 2, oil pump 3, lubricating grease oil drum 4, motor 5, extension axle 6, eccentric bearing 7, plunger sleeve 8, oil press 9, oil feed hole 10, lubricating grease bung 11, switch 12, reset spring 13, plunger 14, scrape oily flabellum 15, lubricating grease inner bag oil drum 16, switching power supply 17, oil feed hole.
Detailed Description
The utility model is further described below with reference to the accompanying drawings:
the present utility model is further illustrated by the following examples, which are not intended to be limiting, but any modifications, equivalents, improvements, etc. within the spirit and principles of the present utility model are intended to be included within the scope of the present utility model.
Embodiment 1, as shown in fig. 1-4, a lubricating grease feeding device, including explosion-proof housing 1, oil pump 2 is installed at explosion-proof housing 1's top, install the motor 4 that drives oil pump 2 work in the explosion-proof housing 1, install lubricating grease barrel 3 on the feed inlet of oil pump 2, lubricating grease barrel 3's top adopts lubricating grease bung 10 shutoff, lubricating grease barrel 3's inside is provided with interchangeable lubricating grease inner bag oil drum 15, lubricating grease barrel 3 still is provided with the scraping oil fan blade 14 with oil pump 2's junction, scraping oil fan blade 14 is connected with motor 4 power, scraping oil fan blade 14 adopts motor 4 direct drive, can accelerate lubricating grease barrel 3 in the oil storage chamber of oil pump 2, does benefit to the scavenging air in the oil storage chamber. The grease inner container oil drum 15 can be directly replaced and repeatedly used.
Embodiment 2, as shown in fig. 1-4, a lubricating grease feeding device, including explosion-proof housing 1, oil pump 2 is installed at explosion-proof housing 1's top, install the motor 4 that drives oil pump 2 work in the explosion-proof housing 1, install lubricating grease oil drum 3 on the feed inlet of oil pump 2, lubricating grease drum 3's top adopts lubricating grease bung 10 to seal, lubricating grease drum 3's inside is provided with interchangeable lubricating grease inner bag oil drum 15, lubricating grease drum 3 still is provided with the scraping oil fan blade 14 with the junction of oil pump 2, scraping oil fan blade 14 and motor 4 power connection.
Further, the oil press 8 is arranged in the grease inner container oil drum 15, after the lubricating grease is filled into the grease inner container oil drum 15, the oil press 8 is placed in the upper part of the grease inner container oil drum 15, and the self weight of the oil press 8 is utilized to facilitate the lubricating grease in the grease oil drum 3 to flow to the oil storage cavity of the oil pump 2.
Preferably, the oil pump 2 includes the pump body that has the storage oil pocket, and the top and the grease oil drum 3 of the pump body are linked together, grease oil drum 3 provides grease for the oil pump 2, the upper surface at explosion-proof housing 1 is fixed to the bottom of the pump body, the pump body embeds has extension axle 5, the upper end and the scraping oil flabellum 14 of extension axle 5 are connected, the bottom of extension axle 5 runs through the power take off shaft transmission connection of pump body and motor 4, install plunger mechanism on the middle part lateral wall of the pump body, the middle part of extension axle 5 is provided with the eccentric bearing 6 of drive plunger mechanism.
The plunger mechanism is driven by the motor 4, and the plunger mechanism pumps out the lubricating grease in the oil storage cavity of the pump body to a position needing to be filled with the lubricating grease through the oil outlet of the plunger device.
Further, the plunger mechanism is of an existing structure and comprises a plunger sleeve 7 with an inner cavity and an oil inlet hole 17, a return spring 12 and a plunger 13, the plunger sleeve 7 is fixed on the outer wall of the pump body, one end of the plunger 13 is in butt joint with the eccentric bearing 6, the other end of the plunger 13 is inserted into the inner cavity of the plunger sleeve 7, two ends of the return spring 12 are respectively connected to the plunger 13 and the outer wall of the plunger sleeve 7, thrust for driving the plunger 13 to move out from the plunger sleeve 7 is provided, and a one-way valve for controlling flow direction is arranged at an oil outlet of the plunger sleeve 7.
The eccentric bearing 6 is provided with an eccentric hole matched with the lengthening shaft 5, the oil pump 2 drives the lengthening shaft 5 to drive the eccentric bearing 6 to rotate, when the eccentric bearing 6 rotates to a limit position far away from the plunger sleeve 7, the plunger 13 is pushed out of the plunger sleeve 7 under the action of the return spring 12, the inner cavity of the plunger sleeve 7 forms negative pressure, the oil inlet hole 17 is communicated with the inner cavity of the plunger sleeve 7 and the oil storage cavity, grease in the oil storage cavity is sucked into the inner cavity of the plunger sleeve 7, the oil pump 2 continues to drive the lengthening shaft 5 to drive the eccentric bearing 6 to rotate, when the eccentric bearing 6 rotates to a limit position close to the plunger sleeve 7, the plunger 13 is inserted into the plunger sleeve 7, the oil inlet hole 17 is plugged, and meanwhile, the grease in the plunger sleeve 7 is extruded and discharged through the outlet of the plunger sleeve 7. Under the cooperation of the eccentric bearing 6 and the return spring 12, the driving plunger 13 reciprocates in the plunger sleeve 7, and the continuous rotation of the eccentric bearing 6 realizes that the oil pump 2 of the utility model continuously conveys lubricating grease into a lubricating system of mechanical equipment.
Further, the bottom of the grease inner container oil drum 15 is communicated with the pump body through the oil supply hole 9.
Further, a power switch 11 for controlling the on-off of the motor 4 is also installed on the outer wall of the explosion-proof housing 1.
Further, the motor 4 is a worm and gear direct current gear motor, and when the motor works in forward rotation, the worm is driven by the motor to rotate, so that a speed reduction effect is realized, and reverse rotation is avoided.
Further, the grease barrel cover 10 is connected with the grease barrel 3 through a hasp, so that the quick opening and closing of the grease barrel cover 10 is realized.
According to the lubricating grease supply device, the connecting part of the lubricating grease oil barrel and the oil pump is further provided with the oil scraping blade, the oil scraping blade is in power connection with the motor, and the oil scraping blade is directly driven by the motor, so that the flow of lubricating grease in the lubricating grease oil barrel to the oil storage cavity of the oil pump can be accelerated, and the air in the oil storage cavity can be cleared.
The lubricating grease supply device provided by the utility model has the advantages that the lubricating grease inner container oil drum can be directly and quickly replaced and repeatedly used, and is matched with the lubricating grease drum cover capable of being quickly opened and closed, the lubricating grease drum cover is quickly and conveniently taken out of the oil pressing device after being opened, the lubricating grease inner container oil drum preloaded with lubricating grease is quickly filled into the lubricating grease oil drum, and finally the oil pressing device and the lubricating grease drum cover are refilled, so that the quick clean addition of lubricating grease is realized.
According to the lubricating grease supply device, the plunger is driven to reciprocate in the plunger sleeve under the cooperation of the eccentric bearing and the reset spring, and the eccentric bearing continuously rotates to realize that the oil pump continuously conveys lubricating grease into a lubricating system of mechanical equipment, so that the lubricating grease supply device is convenient to adjust.
According to the lubricating grease supply device, the oil pressing device is arranged in the lubricating grease inner container oil drum, lubricating grease is firstly filled into the lubricating grease inner container oil drum, then the oil pressing device is placed in the upper portion of the lubricating grease inner container oil drum, and the self weight of the oil pressing device is utilized, so that the lubricating grease in the lubricating grease inner container oil drum can flow to the oil storage cavity of the oil pump.
The foregoing has shown and described the basic principles, main features and advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
The present utility model is not described in detail in the present application, and is well known to those skilled in the art.
Claims (8)
1. Lubricating grease feeding device, including explosion-proof housing (1), its characterized in that: the oil pump (2) is installed at the top of explosion-proof casing (1), install motor (4) of drive oil pump (2) work in explosion-proof casing (1), install lubricating grease oil drum (3) on the feed inlet of oil pump (2), lubricating grease bung (10) shutoff is adopted on the top of lubricating grease oil drum (3), the inside of lubricating grease oil drum (3) is provided with interchangeable lubricating grease inner bag oil drum (15), the junction of lubricating grease oil drum (3) and oil pump (2) still is provided with scrapes oily flabellum (14), it is connected with motor (4) power to scrape oily flabellum (14).
2. Lubricating grease supply apparatus according to claim 1, characterised in that the interior of the grease inner container oil drum (15) is provided with a pressure reservoir (8).
3. The lubricating grease supply device according to claim 2, characterized in that the oil pump (2) comprises a pump body with a storage oil cavity, the top of the pump body is communicated with a lubricating grease oil barrel (3), the lubricating grease oil barrel (3) provides grease for the oil pump (2), the bottom of the pump body is fixed on the upper surface of the explosion-proof shell (1), an extension shaft (5) is arranged in the pump body, the upper end of the extension shaft (5) is connected with a scraping fan blade (14), the bottom end of the extension shaft (5) penetrates through the pump body and is in transmission connection with a power output shaft of the motor (4), a plunger mechanism is mounted on the side wall of the middle part of the pump body, and an eccentric bearing (6) for driving the plunger mechanism is arranged in the middle part of the extension shaft (5).
4. A lubricating grease feeding device according to claim 3, wherein the plunger mechanism comprises a plunger sleeve (7) with an inner cavity and an oil inlet hole (17), a return spring (12) and a plunger (13), the plunger sleeve (7) is fixed on the outer wall of the pump body, one end of the plunger (13) is in butt joint with the eccentric bearing (6), the other end of the plunger is inserted into the inner cavity of the plunger sleeve (7), two ends of the return spring (12) are respectively connected to the outer walls of the plunger (13) and the plunger sleeve (7), thrust for driving the plunger (13) to move out from the plunger sleeve (7) is provided, and a one-way valve for controlling flow direction is arranged at an oil outlet of the plunger sleeve (7).
5. The lubricating grease feeding device according to claim 4, wherein the bottom of the grease inner container oil drum (15) is communicated with the pump body through the oil feeding hole (9).
6. The lubricating grease supply device according to claim 5, characterized in that a power switch (11) for controlling the on-off of the motor (4) is also mounted on the outer wall of the explosion-proof housing (1).
7. The lubricating grease feeding apparatus as claimed in claim 5, wherein the motor (4) is a worm gear direct current speed reduction motor.
8. The lubricating grease supply apparatus as claimed in claim 5, wherein the grease barrel cover (10) is connected to the grease barrel (3) by a snap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321947192.8U CN220453378U (en) | 2023-07-24 | 2023-07-24 | Lubricating grease feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321947192.8U CN220453378U (en) | 2023-07-24 | 2023-07-24 | Lubricating grease feeding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220453378U true CN220453378U (en) | 2024-02-06 |
Family
ID=89740033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321947192.8U Active CN220453378U (en) | 2023-07-24 | 2023-07-24 | Lubricating grease feeding device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220453378U (en) |
-
2023
- 2023-07-24 CN CN202321947192.8U patent/CN220453378U/en active Active
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