CN108953971A - A kind of automobile bearing automatic control oiling device - Google Patents
A kind of automobile bearing automatic control oiling device Download PDFInfo
- Publication number
- CN108953971A CN108953971A CN201810776363.2A CN201810776363A CN108953971A CN 108953971 A CN108953971 A CN 108953971A CN 201810776363 A CN201810776363 A CN 201810776363A CN 108953971 A CN108953971 A CN 108953971A
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- Prior art keywords
- oil
- bearing
- oiling
- cylinder
- solenoid valve
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- 239000004519 grease Substances 0.000 claims abstract description 42
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 230000008878 coupling Effects 0.000 claims abstract description 9
- 238000010168 coupling process Methods 0.000 claims abstract description 9
- 238000005859 coupling reaction Methods 0.000 claims abstract description 9
- 239000008358 core component Substances 0.000 claims abstract description 4
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 13
- 230000033001 locomotion Effects 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 9
- 239000000306 component Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 230000010354 integration Effects 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 230000001429 stepping effect Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 235000014121 butter Nutrition 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 2
- 241000486406 Trachea Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 210000003437 trachea Anatomy 0.000 description 1
Classifications
-
- 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
- F16N37/00—Equipment for transferring lubricant from one container to another
- F16N37/003—Equipment for transferring lubricant from one container to another for filling bearings
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The present invention relates to a kind of automobile bearing automatic control oiling device, including rack, rack is shouldered by workbench, oiling support rod, oiling arm, support, tube support, cylinder backup plate composition.Rack side is provided with oil drum placed hole, and oil drum is supported by support plate；The other side is provided with bearing fixation hole, fixes bearing using shaft and conical platen, stepper motor is installed below workbench, is connected by shaft coupling and bearing.Oil syringe is equipped with pneumatic grease press structure and range controlling mechanism, realizes stepping pressure oil function by solenoid valve and cylinder respectively, wherein pressure oil mechanism is connected by oil line pipe.The core component of shown device programs the autocontrol operation for realizing oiling device by PLC system in control cabinet.A kind of bearing automatic control oiling equipment that the present invention designs, significantly improves oiling working efficiency, small product size is small, and easy to operate, production cost is low, practical.
Description
Technical field
The present invention relates to a kind of automatic control makeups of automobile hub bearing injection grease to set, and belongs to bearing oiling equipment and technology neck
Domain.
Background technique
Automobile parts maintenance is a labour intensive profession, with the rapid growth of domestic labor cost, improves dress
Standby automatization level, cuts payroll to improve efficiency, becomes the important trend developed at present.To realize its high-precision, high efficiency and high-intelligentization
Function, automobile parts maintenance facility gradually apply electromechanical integration technology, have merged accurate machine construction, servo-drive, automatic
A variety of front subject technologies such as control technology.For automotive hub rolling bearing, in order to make it have good rotating property and
Longer service life can generally inject grease between inner ring and outer ring, guarantee to realize profit in prolonged operation process
It is sliding.And existing bearing oiling process automatic control degree is lower, generally passes through manual oiling or mechanical oiling.Manual oiling is easy
There is oil leak, oiling is uneven, and takes time and effort, and makes the reduction of oiling efficiency；In addition, the gap in hub bearing is invisible,
Operator is low to injection flow controlling extent, it is difficult to ensure that gap is filled up completely by butter, is unable to reach rigorous；If lubrication
Not enough, lead to bearing excessive wear；If lubricating grease injection rate is excessive, unnecessary waste is not only resulted in, it is more serious to make
It is increased at bearing temperature, influences bearing life.As it can be seen that traditional manual oiling mode is difficult to realize the needs of society, however it is large-scale
Mechanical oiling equipment price is expensive, complicated for operation, is unable to satisfy the application demand of ordinary enterprises；Therefore there is an urgent need to develop one kind
Novel oiling device solves these problems.
Summary of the invention
The present invention be for overcome the deficiencies in the prior art, and provide a kind of automobile bearing automatic control oiling device；It is applicable in
In the tapered roller bearing of all automobiles, oiling automatic controlization is high-efficient, and realization is grading automatic, and consumptive material is few, at low cost, operation letter
Single, application prospect is very extensive.
The technical solution of the present invention is as follows: a kind of automobile bearing automatic control oiling device, including rack, rack is by workbench, note
Oily support rod, oiling arm, support are shouldered, tube support, cylinder backup plate composition, are equipped on oiling arm and are screwed handle, adjustable
Section arm length is to adjust the horizontal distance of oil nozzle and bearing.Rack side is provided with oil drum placed hole, and oil drum is by support plate branch
Support；The other side is provided with bearing fixation hole, is fixed bearing using shaft and conical platen, installation stepping electricity below workbench
Machine is connected by shaft coupling and bearing.Oil syringe is equipped with pneumatic grease press structure and elevating mechanism, passes through solenoid valve and cylinder respectively
Realize stepping pressure oil function, wherein pressure oil mechanism is connected by oil line pipe.The core component of shown device in control cabinet,
Including singlechip controller, relay, power switch and stepper motor driver, is programmed by PLC system and realize oiling device
Autocontrol operation, control cabinet surface be equipped with single-chip microcontroller operation panel, the input, preservation and operation of program can be carried out.
The pneumatic grease press structure of the oil syringe include oil drum, pressure reducing valve, air inlet, oil grease tube, oil gun switch, cylinder 1,
Solenoid valve 1, grease gun.Pressure reducing valve is used to adjust the air pressure into grease gun, keeps oil pump capacity constant, sets pressure: 0.6 MPa；
Since bearing roller gap is smaller, to allow oil outlet to enter in bearing clearance, oiling quality is improved, 16# medical needle is selected to make
For the oil outlet of grease gun, needle gauge length: 30mm, outer diameter: 1.61mm, internal diameter: 1.25mm.Oil drum one end air inlet is through subtracting
Pressure valve is connected with air compressor, and the other end connects cylinder 1 and solenoid valve 1 by oil line pipe, is equipped with oil outlet above pipeline
Grease gun, the oiling process of realization device are connected by oil grease tube.Solenoid valve 1 selects two-position three way, and by P mouthful of input terminal and
Air compressor is connected, output terminals A, B mouthfuls of two interfaces for connecing cylinder respectively.Cylinder 1 is used to control the switch of oil gun, solenoid valve
1 connects with relay 1, and oiling is realized in the movement for controlling cylinder, and can guarantee each injection flow full of corresponding shaft bearing gap.Device
Oil line pipe be fixed on the supporting lever below bracket, cylinder is bolted on backup plate.
The range controlling mechanism of the oil syringe, including solenoid valve 2, air inlet, venthole, cylinder 2, bolt 3.Each component
Between be connected by tracheae, wherein cylinder end and grease gun are fastenedly connected by bolt 3, when the bearing note to different size
When oily, the vertical range of oil outlet and bearing can be adjusted by adjusting bolt 3.The selection two-position three way of solenoid valve 2, P mouthfuls of input terminal
Air compressor is connect, output terminals A, B mouthfuls connect respectively at two stomatas of cylinder 2.Solenoid valve 2 controls cylinder by connection relay 2
2 movement, cylinder 2 are used to control the up and down motion of oil outlet, and oil outlet can extend into bearing clearance before guaranteeing oiling, after oiling
It lifts.
The bearing fixing mechanism of the oil syringe is made of pin, spring, conical platen, bearing and shaft.Cone
Bearing is fixed in shaft by platen, and achievees the effect that centering using the cooperation of its inner hole and axis, and platen taper is 3-4
Degree, taper is smaller, feels relieved more stable；Shaft processing integrated with bearing pallet realizes that shaft turns simultaneously with pallet band dynamic bearing
It is dynamic.The stepper motor of the oil syringe is controlled by stepper motor driver, realizes stepping rotation, choosing by shaft coupling band dynamic bearing
With corner: 1.8 degree, torque: 2.5 N/M, voltage: 5V.
The bearing of different size can realize that oiling works by changing editing procedure；In addition, can be placed below in oil drum
One disc heater is conducive to oil syringe device and works at low ambient temperatures.
The invention has the advantages that:
1) the PLC automatic control oiling device that the present invention makes can automate oiling to automobile bearing, and work efficiency is high, product
Small in size, easy to operate, production cost is low, practical, is the first choice of private car maintenance unit and enterprise.
2) present invention realizes bearing centering with the use of shaft and conical platen, and it is more efficient and convenient to place bearing.
3) entire oiling process grease is in the environment of sealing, and avoidable butter, which is scattered, to be polluted the environment, can also
Reduce the waste of butter.
Detailed description of the invention
Fig. 1 is the three-dimensional structural schematic diagram of the present invention
Fig. 2 is the structural schematic diagram of the frame of the invention solid；
Fig. 3 is the structural schematic diagram that the frame of the invention is overlooked；
The three-dimensional structure diagram of Fig. 4 present invention pneumatic pressure oil and range controlling mechanism；
Fig. 5 is the structural schematic diagram of shaft of the present invention；
Fig. 6 is the structural schematic diagram of the conical platen of the present invention；
In figure: 1, rack；2, pneumatic grease press structure；3, range controlling mechanism；4, bearing fixing mechanism；5, stepper motor；6
Motor fixing plate；7 bolts 1；8, shaft coupling；9, oil line pipe；10 tracheaes；11, bolt 2；12, three-way interface；13, control cabinet.
1, rack: 14, workbench, 15, bearing fixation hole, 16, oiling support rod, 17, screw handle, 18, oiling arm,
19, support is shouldered, 20, oil drum support plate, 111, tube support, 112, cylinder backup plate；
2, pneumatic grease press structure；21, oil drum, 22, pressure reducing valve, 23, air inlet, 24, oil grease tube, 25, oil gun switch, 26,
Cylinder 1,27, solenoid valve 1,28, grease gun, 29, oil outlet；
3, range controlling mechanism: 31, solenoid valve 2,32, air inlet, 33, venthole, 34, cylinder 2,35, bolt 3；
4, bearing fixing mechanism；41, pin, 42, spring, 43, conical platen, 44, bearing, 45, shaft；
13, control cabinet；131, singlechip controller, 132, relay 1,133, relay 2,134, power switch, 135,
Stepper motor driver, 136, operation panel.
Specific embodiment:
In conjunction with the implementation process of attached drawing the present invention is described in detail oil syringe.As shown in figs 1 to 6, a kind of automobile bearing automatic control
Oiling device, including rack 1, rack 1 shoulder 19 by workbench 14, oiling support rod 16, oiling arm 18, support, pipeline support
Plate 111, cylinder backup plate 112 form, and equipped with handle 17 is screwed on oiling arm, adjustable hand arm lengths are to adjust oil nozzle 29
With the horizontal distance of bearing 44.1 side of rack is provided with oil drum placed hole, and oil drum 21 is supported by support plate 20；The other side is provided with axis
44 fixation holes are held, it is using shaft 45 and conical platen 43 that bearing 44 is fixed, stepper motor 5 is installed below workbench, is passed through
Shaft coupling 8 and bearing 44 connect.Oil syringe is equipped with pneumatic grease press structure 2 and range controlling mechanism 3, gentle by solenoid valve respectively
Cylinder realizes stepping pressure oil function, and wherein pressure oil mechanism 2 is connected by oil line pipe 9.The core component of shown device is controlling
In case 13, including singlechip controller 131, relay 132, power switch 134 and stepper motor driver 135, pass through PLC system
Unified editing journey realizes the automatic running of oiling device, and control cabinet surface is equipped with single-chip microcontroller operation panel 136, can carry out the defeated of program
Enter, save and runs.
The pneumatic grease press structure of the oil syringe includes that oil drum 21, pressure reducing valve 22, air inlet 23, oil grease tube 24, oil gun are opened
Close 25, cylinder 26, solenoid valve 27, grease gun 28.Pressure reducing valve is used to adjust the air pressure into grease gun 28, keeps oil pump capacity constant,
Set pressure: 0.6 MPa；Since bearing roller gap is smaller, to allow oil outlet 29 to enter in bearing clearance, oiling matter is improved
Amount selects oil outlet 29 of the 16# medical needle as grease gun 28, needle gauge length: 30mm, outer diameter: 1.61mm, internal diameter:
1.25mm.Oil drum one end air inlet is connected through pressure reducing valve 22 with air compressor, and the other end connects cylinder 26 by oil line pipe 9
With solenoid valve 27, pipeline top is equipped with oil outlet and connects grease gun 28, the oiling process of realization device by oil grease tube 24.Electromagnetism
Valve 27 selects two-position three way, and P mouthfuls of input terminal are connected with air compressor, and output terminals A, B mouthfuls connect the two of cylinder 26 respectively and connect
At mouthful.Cylinder 26 is used to control the switch of oil gun, and solenoid valve 27 connects with relay 132, and note is realized in the movement of control cylinder 26
Oil, and can guarantee each injection flow full of 44 gap of corresponding shaft bearing.The oil line pipe 9 of device is fixed on the supporting lever below bracket
On 19, cylinder 26 is bolted on backup plate 112.
The range controlling mechanism 3 of the oil syringe, including solenoid valve 31, air inlet 32, venthole 33, cylinder 34, bolt
35.It is connected between each component by tracheae 10, wherein cylinder end is fastenedly connected with grease gun 28 by bolt 35, when to not
When the bearing oiling of same specification, the vertical range of oil outlet 29 and bearing 44 can be adjusted by adjusting bolt 35.Solenoid valve 31 selects
With two-position three way, P mouthfuls of input terminal connect air compressor, and output terminals A, B mouthfuls connect respectively at two stomatas of cylinder 34.Solenoid valve 31 is logical
The movement that connection relay 133 controls cylinder 34 is crossed, cylinder 34 is used to control the up and down motion of oil outlet, fuel-displaced before guarantee oiling
Mouth 29 can extend into 44 gap of bearing, lift after oiling.
The bearing fixing mechanism 4 of the oil syringe, by pin 41, spring 42, conical platen 43, bearing 44 and shaft 45
It constitutes.Bearing 44 is fixed in shaft by conical platen 43, and achievees the effect that centering using the cooperation of its inner hole and axis,
Platen taper is 3-4 degree, and taper is smaller, is felt relieved more stable；Shaft processing integrated with bearing pallet, realizes shaft and pallet band
Dynamic bearing rotates simultaneously.The stepper motor 5 of the oil syringe is controlled by stepper motor driver 135, by shaft coupling 8 with moving axis
44 realization steppings rotation is held, selection corner: 1.8 degree, torque: 2.5 N/M, voltage: 5V.
Working principle: the present invention is automobile bearing automatic control oiling equipment, and working method is as follows:
It needs before apparatus of the present invention work by the input terminal and air compressor of the air inlet of oil drum one end and solenoid valve 1,2
It is connected, and bearing is fixed in shaft using conical platen；Operation program is recalled by the operation panel of control cabinet, so
After start switch, oil syringe device will start to work.Stepper motor 5 starts first, is revolved by shaft coupling 8 with dynamic bearing 44
Turn, it is micro- go to suitable position after stop；Subsequent solenoid valve 31 controls cylinder 34 and grease gun 28 is driven to move downward, and enters bearing
When at about 3 cm of roller clearance, cylinder 31 drives 28 backhaul of grease gun to move upwards, and solenoid valve 27 drives cylinder 26 to open at this time
Oil gun switch 25 carries out oiling, and grease will be extruded by oil outlet 29 and gradually fill 44 gap of bearing, when oil outlet leaves gap
When, grease gun 28 and cylinder 31 stop working, oiling process of the above completion.Stepper motor 5 drives bearing 44 to turn to afterwards
Next bearing clearance, grease gun 28 move down again, and cylinder 26 drives oil gun switch to realize pressure oil process again, so past
Multiple movement, until the last one bearing clearance fills grease, 28 backhaul of grease gun to initial position, system stalls.
Claims (5)
1. a kind of automobile bearing automatic control oiling device, including rack (1), rack (1) is by workbench (14), oiling support rod
(16), oiling arm (18), support are shouldered (19), tube support (111), cylinder backup plate (112) composition, are equipped on oiling arm
It screws handle (17), adjustable hand arm lengths are to adjust the horizontal distance of oil nozzle (29) and bearing (44).It opens rack (1) side
There is oil drum placed hole, oil drum (21) is supported by support plate (20)；The other side is provided with bearing (44) fixation hole, using shaft (45) and
Conical platen (43) is fixed by bearing (44), installs stepper motor (5) below workbench, passes through shaft coupling (8) and bearing
(44) connect.Oil syringe is equipped with pneumatic grease press structure (2) and range controlling mechanism (3), is realized respectively by solenoid valve and cylinder
Stepping pressure oil function, wherein pressure oil mechanism (2) is connected by oil line pipe (9).The core component of shown device is in control cabinet
(13) in, including singlechip controller (131), relay (132), power switch (134) and stepper motor driver (135),
The autocontrol operation for realizing oiling device is programmed by PLC system, control cabinet surface is equipped with single-chip microcontroller operation panel (136), can be into
Input, preservation and the operation of line program.
2. the pneumatic grease press structure of oil syringe includes oil drum (21), pressure reducing valve (22), air inlet according to claim 1
(23), oil grease tube (24), oil gun switch (25), cylinder (26), solenoid valve (27), grease gun (28).Pressure reducing valve for adjust into
The air pressure for entering grease gun (28) keeps oil pump capacity constant, sets pressure: 0.6MPa；It is fuel-displaced to allow since bearing roller gap is smaller
Mouth (29) enters in bearing clearance, improves oiling quality, selects oil outlet (29) of the 16# medical needle as grease gun (28),
Needle gauge length: 30mm, outer diameter: 1.61mm, internal diameter: 1.25mm.Oil drum one end air inlet is compressed through pressure reducing valve 22 and air
Machine is connected, and by oil line pipe (9) connection cylinder (26) and solenoid valve (27), pipeline top is equipped with oil outlet and passes through oil the other end
Rouge pipe (24) connects grease gun (28), the oiling process of realization device.Solenoid valve (27) selects two-position three way, and by input terminal P
Mouthful it is connected with air compressor, output terminals A, B mouthfuls of two interfaces for connecing cylinder (26) respectively.Cylinder (26) is used to control oil gun
Switch, solenoid valve (27) connect with relay (132), and oiling is realized in the movement of control cylinder (26), and can guarantee each oiling
Amount is full of corresponding shaft bearing (44) gap.The oil line pipe (9) of device is fixed on the supporting lever below bracket (19), cylinder (26)
It is bolted on backup plate (112).
3. the range controlling mechanism (3) of oil syringe according to claim 1, including solenoid valve (31), air inlet (32), outlet
Hole (33), cylinder (34), bolt (35).It is connected between each component by tracheae (10), wherein cylinder end and grease gun
(28) it is fastenedly connected by bolt (35), it, can be fuel-displaced by adjusting bolt (35) adjusting when the bearing oiling to different size
The vertical range of mouth (29) and bearing (44).Solenoid valve (31) selects two-position three way, and P mouthfuls of input terminal connect air compressor, output
A, B mouthfuls of end is connect respectively at two stomatas of cylinder (34).The fortune that solenoid valve (31) passes through connection relay (133) control cylinder (34)
Dynamic, cylinder (34) is used to control the up and down motion of oil outlet, and oil outlet (29) can extend into bearing (44) gap before guaranteeing oiling,
It is lifted after oiling.
4. the bearing fixing mechanism (4) of oil syringe according to claim 1, by pin (41), spring (42), conical platen
(43), bearing (44) and shaft (45) are constituted.Bearing (44) is fixed in shaft by conical platen (43), and using in it
The cooperation of hole and axis achievees the effect that centering, and platen taper is (3-4) degree, and taper is smaller, feels relieved more stable；Shaft and bearing retainer
Disk integration processing realizes that shaft rotates simultaneously with pallet band dynamic bearing.The stepper motor (5) of the oil syringe is by stepper motor
Driver (135) control realizes stepping rotation by shaft coupling (8) band dynamic bearing (44), selection corner: 1.8 degree, torque:
2.5N/M, voltage: 5V.
5. the bearing of oil syringe according to claim 1, different size can realize that oiling works by changing editing procedure；
In addition, a disc heater can be placed below in oil drum, is conducive to oil syringe device and works at low ambient temperatures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810776363.2A CN108953971A (en) | 2018-07-16 | 2018-07-16 | A kind of automobile bearing automatic control oiling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810776363.2A CN108953971A (en) | 2018-07-16 | 2018-07-16 | A kind of automobile bearing automatic control oiling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108953971A true CN108953971A (en) | 2018-12-07 |
Family
ID=64481383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810776363.2A Pending CN108953971A (en) | 2018-07-16 | 2018-07-16 | A kind of automobile bearing automatic control oiling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108953971A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137559A (en) * | 2021-04-25 | 2021-07-20 | 闫丽娜 | Bearing oiling equipment for high-end equipment |
| CN113405012A (en) * | 2021-07-01 | 2021-09-17 | 西安热工研究院有限公司 | Combined bearing grease filling device |
| CN113513693A (en) * | 2021-07-22 | 2021-10-19 | 高连风 | Bearing oiling device capable of preventing lubricating oil from overflowing |
| CN114148952A (en) * | 2021-11-29 | 2022-03-08 | 俞明生 | Four-column type automobile lifter convenient to maintain |
-
2018
- 2018-07-16 CN CN201810776363.2A patent/CN108953971A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137559A (en) * | 2021-04-25 | 2021-07-20 | 闫丽娜 | Bearing oiling equipment for high-end equipment |
| CN113405012A (en) * | 2021-07-01 | 2021-09-17 | 西安热工研究院有限公司 | Combined bearing grease filling device |
| CN113405012B (en) * | 2021-07-01 | 2022-07-01 | 西安热工研究院有限公司 | Combined bearing grease filling device |
| CN113513693A (en) * | 2021-07-22 | 2021-10-19 | 高连风 | Bearing oiling device capable of preventing lubricating oil from overflowing |
| CN114148952A (en) * | 2021-11-29 | 2022-03-08 | 俞明生 | Four-column type automobile lifter convenient to maintain |
| CN114148952B (en) * | 2021-11-29 | 2023-09-08 | 聊城锦鸿汽车销售服务有限公司 | Four-column type automobile lifting machine convenient to maintain |
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