CN207727264U - A kind of sewing machine and its screw rod lubrication mechanism - Google Patents
A kind of sewing machine and its screw rod lubrication mechanism Download PDFInfo
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- CN207727264U CN207727264U CN201721890741.7U CN201721890741U CN207727264U CN 207727264 U CN207727264 U CN 207727264U CN 201721890741 U CN201721890741 U CN 201721890741U CN 207727264 U CN207727264 U CN 207727264U
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- leading screw
- storage box
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- screw
- fueller
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Abstract
The utility model discloses a kind of sewing machine and its screw rod lubrication mechanisms, including lead screw assembly, leading screw drive seat, and the fueller for being lubricated for lead screw assembly, lead screw assembly includes leading screw, the motor with the matched feed screw nut of leading screw and driving leading screw rotation, the guide rail extended in the same direction with it is equipped in leading screw both sides, leading screw drive seat is mounted on guide rail and is slidably connected with guide rail, feed screw nut is fixedly connected with leading screw drive seat, fueller is mounted in leading screw drive seat, and the oil outlet of fueller is connected by the oilhole of oil pipe and feed screw nut；Lead screw assembly is lubricated by fueller, when sewing machine works, motor drives leading screw rotation, axial linear movement of the feed screw nut along leading screw, fueller and leading screw drive seat are moved synchronously with feed screw nut, then fueller is remained unchanged with feed screw nut relative position, therefore oil pipe can be with fixed and arranged, the problems such as being not in relative friction breakage oil leak, screw rod lubrication can be made safe and reliable.
Description
Technical field
The utility model is related to leading screw lubrication technical fields of sewing, more particularly to a kind of screw rod lubrication machine of sewing machine
Structure.In addition, the utility model further relates to a kind of sewing machine including above-mentioned screw rod lubrication mechanism.
Background technology
Existing template sewing machine front-rear direction feeding transmission is more to be designed to Lead screw transmission structure, since leading screw is located at platen
In the following, and periphery have other parts barrier, it is difficult to carry out oiling grease lubrication operation.Most of current existing template machine is not set
For lubricating leading screw, leading screw service life greatly shortens meter screw rod lubrication dependency structure.
Also have and feed lubrication is carried out to leading screw with reference to using lathe fueller, fueller is fixed on the machine, passes through
Oil pipe connect fuel feeding with the oil connection on screw pair, but when sewing machine work, since screw pair is filled with respect to fuel feeding
Movement is set, then fueller is fixed in oil pipe one end, and the other end follows feed screw nut secondary motion, oil pipe easily to contact friction with machine
Lead to problems such as to rupture oil leak；In addition, fueller is generally, power oil supply structure is complicated, and cost is higher, and is normally at platform
Under plate, oiling etc. is inconvenient for operation.
Therefore how to make the screw rod lubrication of sewing machine convenient and reliable is that those skilled in the art need the technology solved at present
Problem.
Utility model content
The purpose of this utility model is to provide a kind of screw rod lubrication mechanism of sewing machine, simple in structure, can make leading screw
It lubricates simple and convenient and safe and reliable.The another object of the utility model is to provide a kind of seam including above-mentioned screw rod lubrication mechanism
It threads machine.
In order to solve the above technical problems, the utility model provides a kind of screw rod lubrication mechanism of sewing machine, including leading screw group
Part, leading screw drive seat, and the fueller for being lubricated for the lead screw assembly, the lead screw assembly include leading screw and institute
It states the matched feed screw nut of leading screw and drives the motor of leading screw rotation, be equipped in the leading screw both sides and extended in the same direction with it
Guide rail, the leading screw drive seat are mounted on the guide rail and are slidably connected with the guide rail, the feed screw nut and the silk
Thick stick drive seat is fixedly connected, and the fueller is mounted in the leading screw drive seat, and the oil outlet of the fueller passes through
Oil pipe is connect with the oilhole of the feed screw nut.
Preferably, through-hole is provided in the middle part of the leading screw drive seat, the leading screw passes through the through-hole, the feed screw nut
One end stretch into the through-hole, and the feed screw nut is bolted by its end face of flange and the leading screw drive seat.
Preferably, the leading screw drive seat and the lead screw assembly are located at the lower section of sewing platen, the leading screw drive seat
Top is equipped with crossbeam, and the crossbeam is located at the top of the sewing platen, is provided on the sewing platen in the same direction with the leading screw
The sliding slot of extension, the leading screw drive seat are fixedly connected with the crossbeam by link, and the link passes through the sliding slot
And can be slided along the sliding slot, the fueller be mounted on the crossbeam on, the oil pipe pass through the sliding slot after with institute
State oilhole connection.
Preferably, it is opened on the sewing platen there are two the sliding slot, two sliding slots are symmetrically set in the leading screw group
The both sides of part, the both ends of the leading screw drive seat are respectively by across the accordingly link of the sliding slot and the crossbeam
Both ends connect.
Preferably, the fueller include oil storage box, the piston that is located in the oil storage box and for pushing the work
Mobile rotary screw is filled in, is filled with lubricating grease in the oil storage box, the oil outlet is located at one end of the oil storage box, described
Piston is located at the other end of the oil storage box, and the outer wall of the piston is pressed on the inner wall of the oil storage box, in the storage
The end plate of the other end of oil box is equipped with the threaded hole that connection is matched with the rotary screw screw thread, one end of the rotary screw
It is located at outside the oil storage box, the other end is fixed on after passing through the threaded hole on the piston.
Preferably, the fueller includes closed oil storage box and the piston being located in the oil storage box, the oil storage
Lubricating grease is filled in box, the oil outlet is located at one end of the oil storage box, and the piston is located at the another of the oil storage box
End, and the outer wall of the piston is pressed on the inner wall of the oil storage box, be provided on the end plate of the oil storage box other end into
Gas port is connected with the air inlet pipe pressurizeed for air inlet at the air inlet.
Preferably, the fueller includes oil storage box, is moistened filled with fluid lubrication fat or semifluid in the oil storage box
Consistent lubricant, the oil outlet are opened in the bottom of described oil storage box one end.
Preferably, the oil storage box includes box body and the cover board on the box body, and the cover board is organic glass
Cover board.
Preferably, the oil storage box is connect by the cover board with the crossbeam.
The utility model also provides a kind of sewing machine, including body and the screw rod lubrication mechanism for being installed on the body,
The screw rod lubrication mechanism is specially the screw rod lubrication mechanism described in above-mentioned any one.
The screw rod lubrication mechanism of sewing machine provided by the utility model, including lead screw assembly, leading screw drive seat, and be used for
For the fueller of lead screw assembly lubrication, lead screw assembly includes leading screw, is rotated with the matched feed screw nut of leading screw and driving leading screw
Motor, be equipped with the guide rail that is extended in the same direction with it in leading screw both sides, leading screw drive seat, which is mounted on guide rail and is slided with guide rail, to be connected
It connects, feed screw nut is fixedly connected with leading screw drive seat, and fueller is mounted in leading screw drive seat, and the oil outlet of fueller is logical
The oilhole for crossing oil pipe and feed screw nut connects.
Using the screw rod lubrication mechanism of sewing machine provided by the utility model, lead screw assembly is moistened by fueller
Sliding, when sewing machine works, motor drives leading screw rotation, feed screw nut along leading screw axial linear movement, due to leading screw drive seat
It is fixed with feed screw nut, fueller is mounted in leading screw drive seat, then leading screw drive seat and fueller and feed screw nut are same
Step movement, fueller are remained unchanged with feed screw nut relative position, therefore oil pipe can be not in opposite rub with fixed and arranged
The problems such as galling damage oil leak, screw rod lubrication can be made safe and reliable.
Sewing machine provided by the utility model includes above-mentioned screw rod lubrication mechanism, since above-mentioned screw rod lubrication mechanism is with upper
Technique effect is stated, above-mentioned sewing machine should also have same technique effect, no longer be discussed in detail herein.
Description of the drawings
Fig. 1 is that a kind of structure of specific implementation mode of the screw rod lubrication mechanism of sewing machine provided by the utility model is shown
It is intended to；
Fig. 2 is a kind of another knot of specific implementation mode of the screw rod lubrication mechanism of sewing machine provided by the utility model
Structure schematic diagram；
Fig. 3 is the structure of another specific implementation mode of the screw rod lubrication mechanism of sewing machine provided by the utility model
Schematic diagram；
Fig. 4 is a kind of decomposition diagram of specific implementation mode of fueller provided by the utility model；
Fig. 5 is the decomposition diagram of another specific implementation mode of fueller provided by the utility model；
Fig. 6 is the decomposition diagram of another specific implementation mode of fueller provided by the utility model.
Specific implementation mode
The core of the utility model is to provide a kind of screw rod lubrication mechanism of sewing machine, simple in structure, can make leading screw
It lubricates simple and convenient and safe and reliable.Another core of the utility model is to provide a kind of seam including above-mentioned screw rod lubrication mechanism
It threads machine.
In order to make those skilled in the art more fully understand the utility model, below in conjunction with the accompanying drawings and it is embodied
The utility model is described in further detail for mode.
It please refers to Fig.1 and Fig. 2, Fig. 1 is specific for one kind of the screw rod lubrication mechanism of sewing machine provided by the utility model
The structural schematic diagram of embodiment；Fig. 2 is a kind of specific reality of the screw rod lubrication mechanism of sewing machine provided by the utility model
Apply the another structural schematic diagram of mode.
The screw rod lubrication mechanism for the sewing machine that specific embodiment of the present invention provides, including lead screw assembly, leading screw drive
Dynamic seat 4, and the fueller 5 for being lubricated for lead screw assembly, lead screw assembly include leading screw 1 and 1 matched leading screw spiral shell of leading screw
The motor 3 that mother 2 and driving leading screw 1 rotate is equipped with the guide rail 6 extended in the same direction with it, the installation of 1 drive seat of leading screw in 1 both sides of leading screw
Be slidably connected on guide rail 6 and with guide rail 6, leading screw drive seat 4 can slide back and forth along guide rail 6, while feed screw nut 2 with
Leading screw drive seat 4 is fixedly connected, and fueller 5 is mounted in leading screw drive seat 4, the oil outlet of fueller 5 by oil pipe 7 with
The oilhole of feed screw nut 2 connects.
Using the screw rod lubrication mechanism of sewing machine provided by the utility model, 1 component of leading screw is carried out by fueller 5
Lubrication, sewing machine work when, motor 3 drive leading screw 1 rotate, feed screw nut 2 along leading screw 1 axial linear movement, due to leading screw
Drive seat 4 is fixed with feed screw nut 2, and fueller 5 is mounted in leading screw drive seat 4, then leading screw drive seat 4 and fueller 5
It is moved synchronously with feed screw nut 2, fueller 5 is remained unchanged with 2 relative position of feed screw nut, therefore oil pipe 7 can fix cloth
The problems such as setting, being not in relative friction breakage oil leak can be such that leading screw 1 lubricates securely and reliably.
Further, to save space, can be provided with through-hole at the middle part of leading screw drive seat 4, when installation, leading screw 1 passes through
The guide rail 6 of through-hole, the both ends and 1 both sides of leading screw of leading screw drive seat 4 is slidably connected, in addition, being driven for convenience of feed screw nut 2 and leading screw
The connection of dynamic seat 4, one end of feed screw nut 2 can be stretched into through-hole, and feed screw nut 2 can be driven by its end face of flange and leading screw
Dynamic seat 4 is bolted, and connection is simple and reliable.
Referring to FIG. 3, Fig. 3 is another specific implementation of the screw rod lubrication mechanism of sewing machine provided by the utility model
The structural schematic diagram of mode.
On the basis of above-mentioned each specific implementation mode, since leading screw drive seat 4 and 1 component of leading screw are usually located at sewing platform
The lower section of plate 8, sewing 8 underlying item of platen is more, to make leading screw 1 lubricate simpler convenience, the utility model specific implementation
Fueller 5 can be located at 8 top of sewing platen, specifically, in leading screw by the screw rod lubrication mechanism for the sewing machine that mode provides
4 top of drive seat can be equipped with crossbeam 9, and crossbeam 9 is located at the top of sewing platen 8, be provided with and leading screw 1 on sewing platen 8
The sliding slot 11 extended in the same direction, and the link 10 that can be slided along sliding slot 11 is set, the middle part of link 10 passes through sliding slot 11, and
The both ends of link 10 are fixedly connected with leading screw drive seat 4 and crossbeam 9 respectively, i.e., leading screw drive seat 4 passes through link with crossbeam 9
10 are fixedly connected, and fueller 5 is mounted on crossbeam 9, and oil pipe 7 is connected to after passing through sliding slot 11 with oilhole.
When sewing machine works, feed screw nut 2 is moved along leading screw 1, and link 10 is slided along sliding slot 11, fueller 5, crossbeam
9 and leading screw drive seat 4 moved synchronously with feed screw nut 2；By the way that crossbeam 9 is arranged, fueller 5 is mounted on sewing platen 8
Side, and keep fueller 5 and 2 relative position of feed screw nut constant so that it can carry out leading screw 1 above sewing platen 8 and moisten
Operations, the leading screw 1 such as sliding lubricate simpler convenience.
Further, to ensure the connective stability of crossbeam 9 and leading screw drive seat 4, two or more quantity can be set
The link 10 for connecting crossbeam 9 with leading screw drive seat 4, two links 10 can be symmetrical arranged with respect to 1 component of leading screw, phase
Ying Di is opened on sewing platen 8 there are two sliding slot 11, and two sliding slots 11 are located at the both sides of 1 component of leading screw, two links
10 are each passed through corresponding sliding slot 11, and the both ends of link 10 are connect with crossbeam 9 and leading screw drive seat 4 respectively, realize leading screw
The both ends of drive seat 4 are connect by corresponding link 10 with the both ends of crossbeam 9 respectively.Certainly, the setting quantity of link 10
It is not limited to this, can be adjusted according to actual conditions with mode.
Referring to FIG. 4, the decomposition that Fig. 4 is a kind of specific implementation mode of fueller 5 provided by the utility model is shown
It is intended to.
On the basis of above-mentioned each specific implementation mode, the screw rod lubrication mechanism of sewing machine provided by the utility model supplies
There are many structures of oily device 5, in a specific embodiment, fueller 5 can by oil storage box 51, be located at oil storage box 51
Interior piston 52 and the rotary screw 53 for pushing piston 52 to move form, and lubricating grease, oil outlet are filled in oil storage box 51
It is located at one end of oil storage box 51, piston 52 is located at the other end of oil storage box 51, and the outer wall of piston 52 can be pressed on oil storage box
On 51 inner wall, the screw thread that connection is matched with 53 screw thread of rotary screw is also provided on the end plate of the other end of oil storage box 51
The one end in hole, rotary screw 53 is located at outside oil storage box 51, and the other end is fixed on after passing through threaded hole on piston 52.
By turning rotary screw 53, one end that piston 52 is arranged to oil outlet to oil storage box 51 pushes, you can by oil storage
Lubricating grease in box 51 is squeezed by oil outlet and oil pipe 7 in feed screw nut 2, realizes that the lubrication of 1 component of leading screw, lubrication are simple
It is convenient, and grease lubrication is used, lubricating grease easily adheres on leading screw 1, and greasy property is good, and is not easy to be thrown out of and pollutes other portions
Part.
It, can be on the outer wall of piston 52 in addition, to guarantee lubricating grease being more smoothly squeezed into feed screw nut 2
Several sealing rings are cased with, to increase the leakproofness between piston 52 and oil storage box 51.
Referring to FIG. 5, Fig. 5 is the decomposition of another specific implementation mode of fueller 5 provided by the utility model
Schematic diagram.
In another embodiment specific implementation mode, fueller 5 may include closed oil storage box 51 and be located at oil storage box 51
Interior piston 52, oil storage box 51 is interior to be filled with lubricating grease, and oil outlet is located at one end of oil storage box 51, and piston 52 is located at oil storage box 51
The other end, and the outer wall of piston 52 is pressed on the inner wall of oil storage box 51, and oil storage box 51 is located to the sky of 52 both sides of piston
Between completely cut off, be provided with air inlet on the end plate of 51 other end of oil storage box, the air inlet pressurizeed for air inlet be connected at air inlet
Pipe 54.
Confined space will be formed in oil storage box 51, be ventilated pressurization to the side of the not no lubricating grease of piston 52 by tracheae, it is real
One end that piston 52 is now arranged to oil outlet to oil storage box 51 pushes, and then the lubricating grease in oil storage box 51 is pushed to pass through oil outlet
It is squeezed into feed screw nut 2 with oil pipe 7, realizes the lubrication of 1 component of leading screw, lubrication is simple and convenient, and uses grease lubrication, profit
Consistent lubricant easily adheres on leading screw 1, and greasy property is good, and is not easy to be thrown out of pollution other component.
It, can be on the outer wall of piston 52 in addition, to guarantee lubricating grease being more smoothly squeezed into feed screw nut 2
Several sealing rings are cased with, to increase the leakproofness between piston 52 and oil storage box 51.
Referring to FIG. 6, Fig. 6 is the decomposition of another specific implementation mode of fueller 5 provided by the utility model
Schematic diagram.
In another specific implementation mode, fueller 5 includes oil storage box 51, is moistened filled with fluid in oil storage box 51
Consistent lubricant or quasi-hydrodynamic lubrication fat, and oil outlet is opened in the bottom of 51 one end of oil storage box, in this way, the grease in oil storage box 51 is in weight
Lubricating grease constantly can be provided to feed screw nut 2 by oil pipe 7 under the action of power and 9 feeding of crossbeam vibration, ensure leading screw 1
Lubrication.
Specifically, oil storage box 51 may include the box body 511 being made of bottom plate and side wall and on box body 511
Cover board 512, cover board 512 are preferably organic glass cover board 512.Perspex transparent is preferable, facilitates in observation oil storage box 51
Oil mass can be replenished in time.It is of course also possible to which the other materials such as transparent plastic sheet, the application is selected to be not specifically limited this.
In addition, to ensure the leakproofness of oil storage box 51, and it is facilitated to be mounted on crossbeam 9, oil storage box 51 can pass through lid
Plate 512 is connect with crossbeam 9, by being dimensioned to more than box body 511 for cover board 512, and the side of cover board 512 is made to be fixed on box body
Head cover is used as on 511, the other side of cover board 512 is connect with crossbeam 9；Cover board 512 specifically can be with bolt with box body 511 and crossbeam 9
Connection, connection is simple and reliable, and detachable.In addition, pouring orifice 513 can also be provided on cover board 512, pass through pouring orifice 513
Lubricating grease can be filled into box body 511, it is simple and convenient.Certainly, the structure of cover board 512 is not limited to this, and oil storage box 51 also may be used
To be connect with crossbeam 9 by box body 511, it both is within the protection scope of the present invention.
The structure of the screw rod lubrication mechanism of sewing machine provided by the utility model, fueller 5 is not limited to above-mentioned each tool
Body embodiment can also periodically utilize refueling nozzle by oil pipe 7 directly to 2 shot lubrication fat of feed screw nut, also in this practicality
Within novel protection domain.
In addition to above-mentioned screw rod lubrication mechanism, it includes that above-mentioned leading screw moistens that specific embodiment of the present utility model, which also provides a kind of,
The sewing machine of sliding mechanism, refer to the prior art for the structure of other each sections of the sewing machine, and repeats no more herein.
Sewing machine provided by the utility model and its screw rod lubrication mechanism are described in detail above.It answers herein
The principles of the present invention and embodiment are expounded with specific case, the explanation of above example is only intended to sides
Assistant solves the method and its core concept of the utility model.It should be pointed out that for those skilled in the art,
Without departing from the principle of this utility model, several improvements and modifications can be made to this utility model, these improvement
It is also fallen into the protection domain of the utility model claims with modification.
Claims (10)
1. a kind of screw rod lubrication mechanism of sewing machine, which is characterized in that including lead screw assembly, leading screw drive seat, and for for
The fueller of the lead screw assembly lubrication, the lead screw assembly include leading screw and the matched feed screw nut of the leading screw and drive
The motor of the dynamic leading screw rotation is equipped with the guide rail extended in the same direction with it, the leading screw drive seat installation in the leading screw both sides
It is slidably connected on the guide rail and with the guide rail, the feed screw nut is fixedly connected with the leading screw drive seat, the confession
Oily device is mounted in the leading screw drive seat, the oilhole that the oil outlet of the fueller passes through oil pipe and the feed screw nut
Connection.
2. screw rod lubrication mechanism according to claim 1, which is characterized in that be provided in the middle part of the leading screw drive seat logical
Hole, the leading screw pass through the through-hole, and one end of the feed screw nut is stretched into the through-hole, and the feed screw nut passes through it
End face of flange is bolted with the leading screw drive seat.
3. screw rod lubrication mechanism according to claim 1, which is characterized in that the leading screw drive seat and the lead screw assembly
Positioned at the lower section of sewing platen, crossbeam is equipped with above the leading screw drive seat, the crossbeam is located at the top of the sewing platen,
The sliding slot extended in the same direction with the leading screw is provided on the sewing platen, the leading screw drive seat passes through link with the crossbeam
It is fixedly connected, the link passes through the sliding slot and can be slided along the sliding slot, and the fueller is mounted on the cross
Liang Shang, the oil pipe are connected to after passing through the sliding slot with the oilhole.
4. screw rod lubrication mechanism according to claim 3, which is characterized in that the cunning there are two being opened on the sewing platen
Slot, two sliding slots are symmetrically set in the both sides of the lead screw assembly, and the both ends of the leading screw drive seat are respectively by passing through phase
The link of the sliding slot is answered to be connect with the both ends of the crossbeam.
5. screw rod lubrication mechanism according to any one of claims 1 to 4, which is characterized in that the fueller includes
Oil storage box, the piston being located in the oil storage box and the rotary screw for pushing piston movement are filled out in the oil storage box
Filled with lubricating grease, the oil outlet is located at one end of the oil storage box, and the piston is located at the other end of the oil storage box, and institute
The outer wall for stating piston is pressed on the inner wall of the oil storage box, is equipped with and the rotation on the end plate of the other end of the oil storage box
Turn the threaded hole of screw flight matching connection, one end of the rotary screw is located at outside the oil storage box, and the other end passes through described
It is fixed on after threaded hole on the piston.
6. screw rod lubrication mechanism according to any one of claims 1 to 4, which is characterized in that the fueller includes
Closed oil storage box and the piston being located in the oil storage box, the oil storage box is interior to be filled with lubricating grease, and the oil outlet is located at
One end of the oil storage box, the piston is located at the other end of the oil storage box, and the outer wall of the piston is pressed on the storage
On the inner wall of oil box, it is provided with air inlet on the end plate of the oil storage box other end, is connected with for air inlet at the air inlet
The air inlet pipe of pressurization.
7. screw rod lubrication mechanism according to claim 3 or 4, which is characterized in that the fueller includes oil storage box, institute
It states and is filled with fluid lubrication fat or quasi-hydrodynamic lubrication fat in oil storage box, the oil outlet is opened in the bottom of described oil storage box one end.
8. screw rod lubrication mechanism according to claim 7, which is characterized in that the oil storage box include box body and be mounted on institute
The cover board on box body is stated, the cover board is organic glass cover board.
9. screw rod lubrication mechanism according to claim 8, which is characterized in that the oil storage box by the cover board with it is described
Crossbeam connects.
10. a kind of sewing machine, including body and the screw rod lubrication mechanism for being installed on the body, which is characterized in that the silk
Thick stick lubricating structure is specially the screw rod lubrication mechanism described in claim 1 to 9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721890741.7U CN207727264U (en) | 2017-12-28 | 2017-12-28 | A kind of sewing machine and its screw rod lubrication mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721890741.7U CN207727264U (en) | 2017-12-28 | 2017-12-28 | A kind of sewing machine and its screw rod lubrication mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN207727264U true CN207727264U (en) | 2018-08-14 |
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ID=63083481
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| CN201721890741.7U Active CN207727264U (en) | 2017-12-28 | 2017-12-28 | A kind of sewing machine and its screw rod lubrication mechanism |
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| CN (1) | CN207727264U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107938195A (en) * | 2017-12-28 | 2018-04-20 | 拓卡奔马机电科技有限公司 | A kind of sewing machine and its screw rod lubrication mechanism |
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2017
- 2017-12-28 CN CN201721890741.7U patent/CN207727264U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107938195A (en) * | 2017-12-28 | 2018-04-20 | 拓卡奔马机电科技有限公司 | A kind of sewing machine and its screw rod lubrication mechanism |
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