CN104959955A - Eccentric hanger drawing machine - Google Patents
Eccentric hanger drawing machine Download PDFInfo
- Publication number
- CN104959955A CN104959955A CN201510325163.1A CN201510325163A CN104959955A CN 104959955 A CN104959955 A CN 104959955A CN 201510325163 A CN201510325163 A CN 201510325163A CN 104959955 A CN104959955 A CN 104959955A
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- Prior art keywords
- eccentric
- hangers
- bar
- drawbench
- disc
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/02—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same
- B25B27/06—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting or withdrawing sleeves or bearing races
- B25B27/062—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for connecting objects by press fit or detaching same inserting or withdrawing sleeves or bearing races using screws
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Holders For Apparel And Elements Relating To Apparel (AREA)
Abstract
The invention relates to an eccentric hanger drawing machine. The eccentric hanger drawing machine comprises a drawing rod with axle extending in the vertical direction, wherein an eccentric disc is arranged at the lower end of the drawing rod; the drawing rod is provided with an eccentric hanger capable of rotating corresponding to the drawing rod; the eccentric hanger is positioned above the eccentric disc, and has a hanger part for hanging the left side end surface of a workpiece; and the eccentric disc has an installation station for shifting in a projection of the eccentric hanger in the vertical direction, and a drawing station for shifting out the projection of the eccentric hanger in the vertical direction to hang the right side end surface of the workpiece. The eccentric hanger drawing machine can easily install in the drawing rod and the eccentric hanger, is convenient for installation, has no need to be smashed, prevents the damage, prolongs the service life, and also prevents the deformation or the damage of a frame type structure for installing the workpiece. Users can judge if the eccentric disc and the eccentric hanger are firmly connected with the workpiece through vertically lifting the drawing rod, so that both time and labor are saved, and the production efficiency is improved.
Description
Technical field
The present invention relates to a kind of mechanical provision for disengagement, particularly the eccentric hangers drawbench of one.
Background technology
A kind of bearing disassembling device is disclosed in Chinese patent literature CN201824115U, comprise positioning sleeve, adjusting sleeve and pull rod shaft, the left end of pull rod shaft is provided with eccentric disc, above-mentioned positioning sleeve rotation is assemblied in the pull rod shaft on the right side of eccentric disc, the right-hand member of pull rod shaft is arranged with pressing plate, the nut block that pressing plate and spiral are arranged on the right-hand member of pull rod shaft coordinates, and pressing plate is gone back spiral and is provided with two bolts.In use, corresponding adjusting sleeve is selected according to the specification of bearing, and adjusting sleeve is placed on outside positioning sleeve, then above-mentioned a kind of bearing disassembling device is loaded in brearing bore, rotating rod axle, eccentric disc relative positioning cover rotates thus is stuck in the medial end of bearing, and the rotation of bolt is converted into the rectilinear motion of pressing plate by user by swivel bolt, and pressing plate drives pull rod shaft to move and pulled out from frame by bearing.
The positioning sleeve of above-mentioned a kind of bearing disassembling device needs to be fixed together by adjusting sleeve and bearing, to reach when eccentric disc applies pulling force to the medial end of bearing, and the convenient object that bearing is pulled out.So when mounted, adjusting sleeve is just required to drive in brearing bore, complete the interference fit of adjusting sleeve and brearing bore, and then the object that bearing is extracted by realization together with pull rod shaft, this mounting means very easily damages bearing disassembling device, reduce service life, need frequent renewal part, be unfavorable for reducing production cost.
Summary of the invention
The object of this invention is to provide a kind of eccentric hangers drawbench, to solve in prior art because needing adjusting sleeve and workpiece interference fit and the wearing and tearing caused, life-span short technical problem.
For achieving the above object, the present invention adopts following technical scheme: a kind of eccentric hangers drawbench, comprise the drawing bar that axis extends along the vertical direction, the lower end of drawing bar is provided with eccentric disc, described drawing bar is also provided with the eccentric hangers that can rotate corresponding thereto, eccentric hangers is placed in above eccentric disc, and eccentric hangers has the ear loop for hanging the left end face of drawing workpiece; For hanging the drawing station of its right end face of drawing described workpiece after described eccentric disc has the installation station that proceeds to the projection in the vertical direction of described eccentric hangers and produces the projection in the vertical direction of described eccentric hangers.
Described ear loop be arranged on the downside of described eccentric hangers, turning edge outward of radially extending, the medial surface turned edge outward is not less than the distance of outer to the axis of drawing bar of described eccentric disc to the distance of the axis of described drawing bar.
The upper end of described drawing bar is also provided with drawing nut and is positioned at the installing rack for preventing drawing nut from moving down below drawing nut, described drawing nut screw is arranged on described drawing bar, is provided with the spline position limiting structure for eccentric disc being limited in drawing station between described eccentric hangers and eccentric disc.
Described eccentric hangers is provided with eccentric threaded bore, described drawing bar is provided with the thread segment that arrange corresponding to described eccentric threaded bore, described eccentric hangers realizes relatively rotating of itself and described drawing bar by the threaded engagement of described eccentric threaded bore and thread segment, and the contact end face between described eccentric disc and described eccentric hangers forms described spline position limiting structure.
Described installing rack comprises drawing plate, and described drawing bar is inserted into the middle part of drawing plate, and described drawing nut is placed on the upper side of drawing plate, and the two ends, left and right of drawing plate are equipped with the leg coordinated with its left and right guiding movement.
Described drawing plate extends in left-right direction, and the two ends, left and right of described drawing plate are equipped with the elongated hole that length direction extends in left-right direction, and described leg coordinates with described elongated hole left and right guiding movement.
Described drawing plate is also provided with thrust bearing, and described drawing nut is positioned at above thrust bearing.
The upper end of described drawing bar is radially fitted with for auxiliary first deciliter bar that it rotates.
The upper side of described eccentric hangers is vertically fitted with for auxiliary second deciliter bar that it rotates.
The eccentric hangers drawbench of one of the present invention comprises drawing bar, the lower end of drawing bar is provided with eccentric disc, drawing bar is provided with the eccentric hangers that can rotate corresponding thereto, for hanging the drawing station of its right end face of drawing workpiece after eccentric disc has the installation station that proceeds to the projection in the vertical direction of eccentric hangers and produces the projection in the vertical direction of eccentric hangers, this set makes eccentric hangers drawbench when loading the endoporus of workpiece, only eccentric disc and eccentric hangers need be relatively rotated, just can like a cork drawing bar and eccentric hangers be loaded, need positioning sleeve to strike to pound to enter brearing bore relative to prior art, easy for installation, eccentric hangers drawbench is pounded without the need to striking, avoid and damage eccentric hangers drawbench, extend its service life, also avoid the distortion to the frame class formation installing workpiece or damage simultaneously.In addition, when needs extension draws workpiece, due to positioning sleeve of the prior art and pull rod shaft can relatively rotate and positioning sleeve by adjusting sleeve and brearing bore interference fit, be easy to when pull rod shaft is given a shock cause eccentric disc to overlap with positioning sleeve, because frame environment cannot Real-Time Monitoring, user cannot determine whether eccentric disc has been stuck on the medial end of bearing, bearing disassembling device is caused to pull out rear bearing still in frame, and eccentric disc is produced the projection in the vertical direction of eccentric hangers by a kind of eccentric hangers drawbench of the present invention, to judge whether eccentric disc and eccentric hangers have mounted with workpiece firm by lifting drawing bar up and down for user, this just can be avoided drawing to terminate rear workpiece in installing hole, still cause the situation generation of wasting time and energy, time saving and energy saving, improve production efficiency.
Further, the upper end of drawing bar of the present invention is also provided with drawing nut and is positioned at the installing rack for preventing drawing nut from moving down below drawing nut, drawing nut screw is arranged on drawing bar, the spline position limiting structure for eccentric disc being limited in drawing station is provided with between eccentric hangers and eccentric disc, like this when rotating drawing nut drawing workpiece, without the need to worrying that eccentric hangers and eccentric disc relatively rotate, causing eccentric disc and the eccentric hangers distance in the lateral direction extension brought that diminishes and drawing the phenomenon of inefficacy to occur.
Further, eccentric hangers is provided with eccentric threaded bore, drawing bar is provided with the thread segment that arrange corresponding to screwed hole, eccentric hangers realizes relatively rotating of itself and drawing bar by the threaded engagement of screwed hole and thread segment, like this when drawing workpiece, only need rotate drawing nut, bearing disassembling device in hinge structure comes to apply pulling force to pull rod shaft by the multiple bolts rotated on pressing plate, need during use to screw multiple bolt, complex operation, and due to the screw thread amount of feeding of the multiple bolt of very difficult guarantee identical, such positioning sleeve and pull rod shaft easily occur crooked in drawing process, and then deviate from brearing bore, the eccentric hangers drawbench of one of the present invention, time saving and energy saving, and avoid multiple bolt and cannot ensure the problem that the amount of feeding is identical.In addition, contact end face between eccentric disc and eccentric hangers forms spline position limiting structure, and this set makes spline position limiting structure directly make use of contact end face between eccentric disc and eccentric hangers, without the need to setting up extra parts, simplify the structure of eccentric hangers drawbench, and simple to operate.
Accompanying drawing explanation
Fig. 1 is the structural representation of the using state of a kind of embodiment of eccentric hangers drawbench of the present invention;
Fig. 2 is the assembly structure schematic diagram of eccentric hangers in Fig. 1, drawing bar, first deciliter bar and second deciliter bar;
Fig. 3 is the assembly structure schematic diagram that in Fig. 1, eccentric disc is in eccentric hangers and drawing bar when installing station;
Fig. 4 is the structural representation of eccentric hangers in Fig. 1;
Fig. 5 is the A-A sectional view of Fig. 4;
Fig. 6 is the structural representation of drawing bar in Fig. 1;
Fig. 7 is the top view of Fig. 6;
Fig. 8 is the structural representation of drawing plate in Fig. 1;
Fig. 9 is the B-B sectional view of Fig. 8;
Figure 10 is the structural representation of leg in Fig. 1;
Figure 11 is the C-C sectional view of Figure 10.
Detailed description of the invention
The eccentric hangers drawbench of one of the present invention, as shown in figs. 1-11, it comprises drawing bar 1, and drawing bar is the screw mandrel that axis extends along the vertical direction, and the lower end of drawing bar is provided with the eccentric disc perpendicular to its axis direction.Above-mentioned drawing bar 1 is provided with eccentric hangers 5, and eccentric hangers 5 can relatively rotate with drawing bar, and eccentric hangers 5 is positioned at above eccentric disc, and eccentric hangers has the ear loop for hanging the left end face of drawing workpiece.For hanging the drawing station of its right end face of drawing workpiece after eccentric disc has the installation station that proceeds to the projection in the vertical direction of eccentric hangers and produces the projection of eccentric hangers.
Above-mentioned eccentric hangers is the sleeve-like configuration extended along the vertical direction, above-mentioned ear loop be arranged on the downside of eccentric hangers, turning edge outward of radially extending, the medial surface turned edge outward is not less than the distance of outer to the axis of drawing bar of eccentric disc to the distance of the axis of drawing bar.When eccentric disc proceeds to the projection in the vertical direction of eccentric hangers, eccentric disc and eccentric hangers 5 overlap, and when eccentric disc and eccentric hangers 5 reach minimum range in the lateral direction, eccentric disc is in installation station; Eccentric disc is after producing the projection in the vertical direction of eccentric hangers, and when eccentric disc turns to eccentric hangers 5 ultimate range in the lateral direction, eccentric disc is in drawing station.Certainly, in other embodiments, above-mentioned eccentric hangers can also be the platy structure extended in left-right direction, which is provided with eccentric mounting hole, extends to form above-mentioned ear loop away from after one end downward bending of eccentric mounting hole towards the direction deviating from its axis.
The upper end of above-mentioned drawing bar is provided with drawing nut 3 and the installing rack for preventing drawing nut from moving down be positioned at below drawing nut, and drawing nut 3 spiral is arranged on drawing bar.Above-mentioned installing rack comprises drawing plate 7, and above-mentioned drawing bar is inserted into the middle part of drawing plate, and drawing nut 3 is placed on the upper side of drawing plate, and the two ends, left and right of drawing plate are equipped with the leg coordinated with its left and right guiding movement.In the present embodiment, the shape of drawing plate 7 is the rectangle extended in left-right direction, and certainly, in other embodiment, the shape of drawing plate can also be circle etc.In order to reduce the friction between drawing nut 3 and drawing plate, the middle part of drawing plate is also provided with thrust bearing 10, and above-mentioned drawing nut 3 is positioned at above thrust bearing 10.The two ends, left and right of drawing plate are equipped with the elongated hole that length direction extends in left-right direction, each elongated hole place is equipped with leg 4, leg 4 coordinates with elongated hole left and right guiding movement, in the present embodiment, above-mentioned elongated hole is up-narrow and down-wide notch cuttype elongated hole, the lower end of above-mentioned leg is circular shaft, the upper end of leg is square shaft, square shaft is left and right guiding movement in the wide aperture of above-mentioned notch cuttype elongated hole, and leg is installed together with drawing plate is removable by the fastening bolt 2 through drawing plate rear screw end mounted thereto.Certainly, in other embodiments, above-mentioned leg 4 can also be oval axle or square shaft etc., above-mentioned elongated hole can also be the through hole directly running through drawing plate, the length direction of through hole extends in left-right direction, drawing plate is arranged on the upper surface of leg, and leg 4 is coordinated with above-mentioned elongated hole left and right guiding movement by the fastening bolt through drawing plate rear screw end mounted thereto.
The spline position limiting structure for eccentric disc being limited in drawing station is provided with between above-mentioned eccentric hangers and eccentric disc.In the present embodiment, above-mentioned eccentric hangers is provided with eccentric threaded bore, and drawing bar is provided with the thread segment that arrange corresponding to eccentric threaded bore, and eccentric hangers realizes relatively rotating of itself and drawing bar by the threaded engagement of eccentric threaded bore and thread segment.When drawing bar 1 turn to eccentric disc arrive with eccentric hangers ultimate range in the lateral direction time, contact end face block between the below of eccentric hangers and the top of eccentric disc coordinates, the rotating in same direction action of eccentric disc is terminated, prevent eccentric disc to be rotated further and eccentric disc and eccentric hangers distance are in the lateral direction diminished gradually, the contact end face between above-mentioned eccentric disc and eccentric hangers forms above-mentioned spline position limiting structure.
In order to easily eccentric disc be turned to it, station or drawing station are installed, the upper end of above-mentioned drawing bar is radially fitted with first deciliter bar 9, the upper side of eccentric hangers is vertically fitted with second deciliter bar 11, first deciliter bar 9 extends along the axis direction perpendicular to drawing bar, second deciliter bar is L-type structure, and the long edge of L-type extends perpendicular to the direction of the upper side of eccentric hangers.First, second deciliter bar the rotation utilizing arm of force principle to facilitate drawing bar 1 and eccentric hangers is set, time saving and energy saving.Certainly, in other embodiments, first, second deciliter bar can also be cancelled, above-mentioned eccentric hangers is arranged the locking hole inserted for inner hexagon spanner, during use, user one hand-held monkey wrench clamping drawing bar upper end, another hand rotates inner hexagon spanner.
The eccentric hangers drawbench of one of the present invention in use, first deciliter bar 9 is inserted on drawing bar 1, second deciliter bar 11 is inserted on the upper side of eccentric hangers, rotate drawing bar 1 and eccentric disc is proceeded to the projection of eccentric hangers at above-below direction, eccentric disc and eccentric hangers overlap in the vertical direction, eccentric disc is in installation station, and drawing bar 1 is put into the endoporus of workpiece 8 by user together with eccentric disc.Rotate drawing bar 1, eccentric disc is produced the projection of eccentric hangers at above-below direction, when eccentric disc turns to eccentric hangers ultimate range in the lateral direction, contact end face block between the top of eccentric disc and the below of eccentric hangers coordinates, the reversion of eccentric disc is terminated, and now, eccentric disc is in drawing station, eccentric disc and eccentric hangers all tangle the downside end face of workpiece, take off first, second deciliter bar.Again two legs 4 are arranged on drawing plate by fastening bolt is removable, drawing sleeve-board is contained in the upper end of drawing bar, according to the position dimension of structure frame 6 being installed workpiece place, move left and right two legs 4 increase or reduce the distance between two legs 4, thus dodge the structure of installing workpiece place, such an arrangement reduce the restriction of field of employment to eccentric hangers drawbench of the present invention, make its range of application more extensive.After tightening fastening bolt 2, the top, lower end of leg is pressed in frame 6.
Drawing nut 3 spiral is arranged on the upper end of drawing bar, then drawing nut 3 is rotated by outer hexagonal spanner, drawing nut 3 drives drawing bar to move up, and drawing bar applies pulling force upwards by eccentric disc and eccentric hangers to workpiece, is extracted by workpiece in frame.
Eccentric hangers drawbench of the present invention can be applicable to the drawing taking-up work of the spare and accessory parts such as outer ring of bushing in all kinds of blind hole, shoulder hole, spacer, stuffing box, damage bearing.Eccentric hangers drawbench of the present invention can be applicable in the production fields such as oil refining especially, solve the technical barrier that workpiece that the blind hole at numerous common apparatus partial structurtes place, the fouling of shoulder hole internal cause, coking, mild wear distortion or elastic conjunction etc. cause is difficult to take out in equipment is correlated with repair and maintenance maintenance, its versatility, practicality are stronger.
Be more than the preferred embodiments of the present invention, in other embodiments, above-mentioned eccentric hangers can also be sleeved on drawing bar, and above-mentioned spline position limiting structure can also be inserted into the latch on eccentric disc, eccentric hangers successively.In other embodiments, the medial surface turned edge outward can also be less than the distance of outer to the axis of drawing bar of eccentric disc to the distance of the axis of drawing bar, when eccentric disc proceeds to the projection in the vertical direction of eccentric hangers, eccentric disc to be drawn close and not exclusively overlapping in the vertical direction mutually with turning edge outward, the medial surface turned edge outward is less than the distance of outer to the axis of drawing bar of eccentric disc to the distance of the axis of drawing bar, when eccentric disc produces the projection of eccentric hangers at above-below direction, eccentric disc with to turn edge outward mutually away from, eccentric disc and the distance reaching in the lateral direction and enough hang and draw workpiece that turns edge outward.
In other embodiments, above-mentioned installing rack can also adopt other structure, as comprised drawing plate and being removablely arranged on bolt uniform along its axis on drawing plate.Those skilled in the art also can in varied situations, and carry out equivalent replacement according to the design general knowledge of this area, it is all within protection scope of the present invention.
Claims (9)
1. an eccentric hangers drawbench, comprise the drawing bar that axis extends along the vertical direction, the lower end of drawing bar is provided with eccentric disc, it is characterized in that: described drawing bar is also provided with the eccentric hangers that can rotate corresponding thereto, eccentric hangers is placed in above eccentric disc, and eccentric hangers has the ear loop for hanging the left end face of drawing workpiece; For hanging the drawing station of its right end face of drawing described workpiece after described eccentric disc has the installation station that proceeds to the projection in the vertical direction of described eccentric hangers and produces the projection in the vertical direction of described eccentric hangers.
2. the eccentric hangers drawbench of one according to claim 1, it is characterized in that: described ear loop be arranged on the downside of described eccentric hangers, turning edge outward of radially extending, the medial surface turned edge outward is not less than the distance of outer to the axis of drawing bar of described eccentric disc to the distance of the axis of described drawing bar.
3. the eccentric hangers drawbench of one according to claim 1, it is characterized in that: the upper end of described drawing bar is also provided with drawing nut and is positioned at the installing rack for preventing drawing nut from moving down below drawing nut, described drawing nut screw is arranged on described drawing bar, is provided with the spline position limiting structure for eccentric disc being limited in drawing station between described eccentric hangers and eccentric disc.
4. the eccentric hangers drawbench of one according to claim 3, it is characterized in that: described eccentric hangers is provided with eccentric threaded bore, described drawing bar is provided with the thread segment that arrange corresponding to described eccentric threaded bore, described eccentric hangers realizes relatively rotating of itself and described drawing bar by the threaded engagement of described eccentric threaded bore and thread segment, and the contact end face between described eccentric disc and described eccentric hangers forms described spline position limiting structure.
5. the eccentric hangers drawbench of one according to claim 3, it is characterized in that: described installing rack comprises drawing plate, described drawing bar is inserted into the middle part of drawing plate, described drawing nut is placed on the upper side of drawing plate, and the two ends, left and right of drawing plate are equipped with the leg coordinated with its left and right guiding movement.
6. the eccentric hangers drawbench of one according to claim 5, it is characterized in that: described drawing plate extends in left-right direction, the two ends, left and right of described drawing plate are equipped with the elongated hole that length direction extends in left-right direction, and described leg coordinates with described elongated hole left and right guiding movement.
7. the eccentric hangers drawbench of one according to claim 5, it is characterized in that: described drawing plate is also provided with thrust bearing, described drawing nut is positioned at above thrust bearing.
8. the eccentric hangers drawbench of the one according to any one of claim 1-7, is characterized in that: the upper end of described drawing bar is radially fitted with for auxiliary first deciliter bar that it rotates.
9. the eccentric hangers drawbench of the one according to any one of claim 1-7, is characterized in that: the upper side of described eccentric hangers is vertically fitted with for auxiliary second deciliter bar that it rotates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510325163.1A CN104959955B (en) | 2015-06-12 | 2015-06-12 | A kind of eccentric hangers drawbench |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510325163.1A CN104959955B (en) | 2015-06-12 | 2015-06-12 | A kind of eccentric hangers drawbench |
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| Publication Number | Publication Date |
|---|---|
| CN104959955A true CN104959955A (en) | 2015-10-07 |
| CN104959955B CN104959955B (en) | 2017-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510325163.1A Active CN104959955B (en) | 2015-06-12 | 2015-06-12 | A kind of eccentric hangers drawbench |
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| CN (1) | CN104959955B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111203835A (en) * | 2020-02-28 | 2020-05-29 | 广西玉柴机器股份有限公司 | Bearing drawing tool |
| CN111802025A (en) * | 2020-07-20 | 2020-10-23 | 江苏省翠源食品股份有限公司 | Telescopic adjusting type vegetable plug seedling field planting puncher |
| CN113459037A (en) * | 2020-03-31 | 2021-10-01 | 上海烟草集团有限责任公司 | Center pin shaft mounting tool and center pin shaft mounting method |
| CN115068677A (en) * | 2022-06-22 | 2022-09-20 | 北京市春立正达医疗器械股份有限公司 | Multifunctional biological filler and kit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111203835A (en) * | 2020-02-28 | 2020-05-29 | 广西玉柴机器股份有限公司 | Bearing drawing tool |
| CN113459037A (en) * | 2020-03-31 | 2021-10-01 | 上海烟草集团有限责任公司 | Center pin shaft mounting tool and center pin shaft mounting method |
| CN113459037B (en) * | 2020-03-31 | 2023-08-29 | 上海烟草集团有限责任公司 | Mounting tool for center pin shaft and mounting method for center pin shaft |
| CN111802025A (en) * | 2020-07-20 | 2020-10-23 | 江苏省翠源食品股份有限公司 | Telescopic adjusting type vegetable plug seedling field planting puncher |
| CN115068677A (en) * | 2022-06-22 | 2022-09-20 | 北京市春立正达医疗器械股份有限公司 | Multifunctional biological filler and kit |
| CN115068677B (en) * | 2022-06-22 | 2024-03-15 | 北京市春立正达医疗器械股份有限公司 | Multifunctional biological filler and kit |
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| Publication number | Publication date |
|---|---|
| CN104959955B (en) | 2017-10-03 |
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