CN102729077A - Clamp for cylinder joint - Google Patents
Clamp for cylinder joint Download PDFInfo
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- CN102729077A CN102729077A CN2012101387169A CN201210138716A CN102729077A CN 102729077 A CN102729077 A CN 102729077A CN 2012101387169 A CN2012101387169 A CN 2012101387169A CN 201210138716 A CN201210138716 A CN 201210138716A CN 102729077 A CN102729077 A CN 102729077A
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- block
- cylinder connector
- fixed disk
- claw
- slide block
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Abstract
The invention discloses a clamp for a cylinder joint. The clamp comprises a fixed disc (1) for fixing, wherein the upper end surface of the fixed disc (1) is provided with at least three clamping seats (2) which are averagely arranged along the circumferential direction; the length direction of each clamping seat (2) is consistent to the radial direction of the fixed disc (1), and the fixed disc (1) is provided with a central hole (1.1); each clamping seat (2) is provided with a sliding block (3), a sliding groove (4) and a poking block (6); the poking block (6) is used for moving or limiting the sliding block (3); the sliding groove (4) is positioned at the upper end surface of the clamping seat (2), and the length direction of the sliding groove (4) is consistent to the length direction of the clamping seat (2); the lower end of the sliding block (3) is connected in the sliding groove (4) in a sliding manner; the upper end of the sliding block (3) is detachably connected with a clamping claw (5); and the poking block (6) is hinged with the clamping seat (2); and the central hole (1.1) is internally provided with a center correcting device for controlling rotation of the poking block (6). The clamp disclosed by the invention has the characteristics of better safety, simplicity in operation, better concentricity and lower production cost.
Description
Technical field
The invention belongs to the frock clamp field, particularly relate to a kind of cylinder connector anchor clamps that are used for cylinder connector processing.
Background technology
At present, the prior art cylinder connector in process, use be common universal fixturing; With pressing plate cylinder connector is compressed gently earlier during use; Use hand deemphasis center again, and to need the workman to estimate definite at the center of cylinder connector, with spanner pressing plate compressed and can process subsequently.But this cylinder connector anchor clamps when rectifying the center, landing and make the injured industrial accident of operator easily, safety in utilization is relatively poor; Ocular estimate is rectified the center simultaneously, and it is more loaded down with trivial details to cause concentricity to be regulated, and the concentricity after regulating is relatively poor, and the yield rate of workpiece processing is lower, causes production cost higher; Moreover when needing the cylinder connector of processing different size, need the pressing plate of different size, and to operate more loaded down with trivial detailsly, the anchor clamps cost is higher, finally causes production cost higher.
Summary of the invention
The present invention is directed to above problem provide a kind of safety in utilization better, simple, the concentricity of operation better and produce lower cylinder connector anchor clamps.
The present invention overcomes the above problems used technical scheme: a kind of cylinder connector anchor clamps with following structure are provided; It comprises the fixed disk that is used for fixing; Described fixed disk upper surface is provided with at least along circumferential three decks of average mark; And the length direction of each deck is all radially consistent with fixed disk, and described fixed disk is provided with centre bore; Be equipped with slide block, chute on described each deck and be used for that slide block moves or spacing shifting block; Described chute is positioned at the upper surface of deck; And the length direction of chute is consistent with the length direction of deck; The lower end of described slide block is slidingly connected in the chute, the removable claw that is connected with in the upper end of slide block, and described shifting block and deck are hinged; Be provided with in the described centre bore and be used to control the strong center fixture that shifting block rotates.
After adopting above structure; Compared with prior art, the present invention is owing to be provided with in the fixed disk upper surface at least along circumferential three decks of average mark, and the length direction of each deck is all radially consistent with fixed disk; Be equipped with slide block, chute on described each deck and be used for that slide block moves or spacing shifting block; Described chute is positioned at the upper surface of deck, and the length direction of chute is consistent with the length direction of deck, and the lower end of described slide block is slidingly connected in the chute; The removable claw that is connected with in the upper end of slide block, described shifting block and deck are hinged; Be provided with in the described centre bore and be used to control the strong center fixture that shifting block rotates; After then being fixed on each claw on the slide block; Make the end face in the nearly fixed disk of each claw circumferentially form the external diameter that circle is slightly larger than cylinder connector, subsequently cylinder connector is put into, make shifting block rotate through rectifying center fixture again along fixed disk; And then shifting block drives slide block; And slide block drives claw along radially the moving to the fixed disk center of circle of fixed disk, and the end face in the nearly fixed disk of each claw is close to and can cylinder connector be clamped with the annular outer circumference surface of cylinder connector, and the axis of the axis of cylinder connector annular section and fixed disk is on same straight line; So after cylinder connector is put into, rectify the center through mechanical device and need not the artificial center of rectifying again, cylinder connector is difficult for landing, also just is not prone to the industrial accident that makes the operator injured, security adds; Concentricity relies on mechanical device to regulate, and makes that operation is simpler, and concentricity is better; When pressing from both sides the cylinder connector of different model like need, only need to regulate a position of rectifying center fixture or claw and get final product, need not to change any parts, simple to operate, equipment cost is also lower, and then makes production cost lower.So the present invention has, and safety in utilization is better, operation is simple, concentricity is better and produce lower characteristics.
As improvement, describedly be used for that slide block moves or spacing shifting block is meant, described shifting block is provided with first convexity; The nearly fixed disk center position in described slide block lower surface is provided with groove, and the described first protruding free end is movably connected in the groove, and then the manufacturing cost of the shifting block of this structure and slide block is lower; Durable; And shifting block can be promptly promotes slide block or spacing, and flexibility and stability all add when making use of the present invention, and manufacturing cost is lower.
As further improvement, described strong center fixture comprises regulating block adjusting bolt and limited block, and the center of described regulating block is provided with through hole; One end of described regulating block is slidingly connected in the centre bore, and the outer circumference surface of the regulating block other end is provided with annular groove, and described shifting block is provided with second convexity; Described second convexity is movably connected in the annular groove, and described limited block is positioned at the lower surface of fixed disk, and the area of limited block is greater than the sectional area of centre bore; And limited block is provided with screwed hole; The screw rod of described adjusting bolt crosses through hole and screwed hole screws, and leaves the gap between described end face that is slidingly connected at regulating block one end in the centre bore and the limited block, and then the strong center fixture structure of this structure is simpler; Preparation cost is lower; Better working stability, so make preparation cost of the present invention further reduce, job stability further improves.
As further improving, the angle between described first convexity and second convexity is the right angle again, and it is the shortest to make that the second protruding length can drop to, so can make that the compactedness of structure of the present invention is better, overall volume is less, makes things convenient for the workman to dismantle the present invention.
As further improving again; Be provided with the fairlead to regulating block one end slide-and-guide in the described centre bore, then fairlead can make that directionality was better when regulating block slided, and is difficult for squinting or rocking; And then make regulating block more stable to the effect of setting ahead; The response speed of setting ahead is also very fast, and regulating block is spacing more firm to what set ahead when static, thus make the present invention in use stability further improve again.
As further improving again, be provided with back-moving spring between described second convexity and the fixed disk, described fixed disk is provided with the spacing hole spacing to back-moving spring; Described back-moving spring one end is against on second convexity; The back-moving spring other end is against the bottom of spacing hole, then when regulating block rises, and the shifting block rotation that can make progress rapidly under the effect of back-moving spring; Thereby make claw promptly throw off with cylinder connector; But make workman's very first time that the cylinder connector that machines is moved away from,, and then arrive the purpose that improves the cylinder connector working (machining) efficiency so that carry out the processing of next cylinder connector quickly.
As further improving again; Described shifting block and deck is hinged is meant that the end at the nearly fixed disk of deck (1) center is provided with opening, described shifting block is hinged in the opening; Then can make jointed shaft and deck between shifting block and the deck that two stress points are arranged; Can bear bigger gravity, prevent that the situation of jointed shaft fracture in process from taking place, thereby stability in use of the present invention and security further are provided.
As further improving, described upper end of slide block face and claw lower surface are equipped with the plane teeth of equidistance, and the plane teeth of upper end of slide block face and claw lower surface is meshing with each other again; Plane teeth is meant a plurality of teeth that are provided with in the plane, generally adopts the method for roll extrusion to make in the plane, then when regulating; Can regulate each claw according to the number of teeth; And the mode that need not to re-use range finding is regulated claw, operates simplyr, and the concentricity of each claw after regulating is better; And then make that behind the claw clamping cylinder joint, the concentricity of cylinder connector and fixed disk is also better.
As further improving, described claw is provided with mounting hole again, and mounting hole is also referred to as waist-shaped hole or racetrack hole; The hole wall of described mounting hole is provided with step, and is provided with in the mounting hole and is used for claw is fixed on the set bolt on the slide block, and described upper end of slide block face is provided with the counterbore of internal thread; Described set bolt screw rod crosses mounting hole and counterbore screws; And set bolt spiral shell head and step are close to, and the then setting of mounting hole makes and can regulate claw after unclamping set bolt; And no longer need fully set bolt to be selected fully; Feasible operation is simpler, and also need not the adjusting that a plurality of screwed holes satisfy claw is set on slide block, and preparation cost is lower; And the setting that the hole wall of mounting hole is topped bar makes the spiral shell head of set bolt be positioned at waist-shaped hole, prevents that the workman from touching the spiral shell head of set bolt when placing cylinder connector and injured, further improves safety in utilization of the present invention.
As further improving, described claw is provided with protruding along its length skidding, then when putting into cylinder connector; The lower surface of cylinder connector contacts with skidding, prevents that the lower surface of cylinder connector from contacting with plane teeth on the slide block, and makes plane teeth suffer breakage; Cause claw fixing unstable; Even situation about can't fix appears, and making longer service life of the present invention, stability is better.
Description of drawings
Fig. 1 is the structural representation of cylinder connector anchor clamps of the present invention.
Fig. 2 is the structural representation of cylinder connector anchor clamps claw of the present invention.
Fig. 3 is the structural representation of cylinder connector anchor clamps slide block of the present invention.
As shown in the figure: 1, fixed disk, 1.1, centre bore, 1.2, spacing hole, 2, deck, 2.1, opening 3, slide block, 3.1, groove; 3.2, counterbore, 4, chute, 5, claw, 5.1, mounting hole, 5.2, step; 5.3, skidding, 6, shifting block, 6.1, first convexity, 6.2, second convexity, 7, regulating block; 7.1, through hole, 7.2, annular groove, 8, regulate bolt, 9, limited block, 9.1, screwed hole; 10, fairlead, 11, back-moving spring, 12, plane teeth, 13, set bolt, 14, cylinder connector.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment, the present invention done further describing.
Like Fig. 1, Fig. 2 and cylinder connector anchor clamps shown in Figure 3; It comprises the fixed disk 1 that is used for fixing; Described fixed disk 1 upper surface is provided with at least along circumferential three decks 2 of average mark (this example is three, also can be four, five, six or seven or the like), and the length direction of each deck 2 is all radially consistent with fixed disk 1; All on the circumference of same circle, described fixed disk 1 is provided with centre bore 1.1 at the center of each deck 2; Be equipped with slide block 3, chute 4 on described each deck 2 and be used for that slide block 3 moves or spacing shifting block 6; Described chute 4 is positioned at the upper surface of deck 2; And the length direction of chute 4 is consistent with the length direction of deck 2; The lower end of described slide block 3 is slidingly connected in the chute 4, the removable claw 5 that is connected with in the upper end of slide block 3, and described shifting block 6 is hinged with deck 2; Be provided with in the described centre bore 1.1 and be used to control the strong center fixture that shifting block 6 rotates.
Describedly be used for that slide block 3 moves or spacing shifting block 6 is meant; Described shifting block 6 is provided with first convexity 6.1, and nearly fixed disk 1 center position in described slide block 3 lower surfaces is provided with groove 3.1, and described first protruding 6.1 free end is movably connected in the groove 3.1; Promptly first protruding 6.1 free end is positioned at groove 3.1; When shifting block 6 rotated, first protruding 6.1 drove slide blocks 3 along the moving radially of fixed disk 1 through groove 3.1, and when shifting block 6 is static; First protruding 6.1 is spacing through 3.1 pairs of slide blocks 3 of groove, and anti-limited slip block 3 moves.
Described strong center fixture comprises regulating block 7 adjusting bolts 8 and limited block 9, and the center of described regulating block 7 is provided with through hole 7.1, and an end of described regulating block 7 is slidingly connected in the centre bore 1.1; The outer circumference surface of regulating block 7 other ends is provided with annular groove 7.2; Described shifting block 6 is provided with second protruding 6.2, described second protruding 6.2 and is movably connected in the annular groove 7.2, and promptly second protruding 6.2 free end is positioned at annular groove 7.2; Described limited block 9 is positioned at the lower surface of fixed disk 1; The area of limited block 9 guarantee that limited block 9 can not get in the centre bore 1.1, and limited block 9 is provided with screwed hole 9.1 greater than the sectional area of centre bore 1.1; The screw rod of described adjusting bolt 8 is crossed through hole 7.1 and is screwed with screwed hole 9.1; Leave the gap between described end face that is slidingly connected at regulating block 7 one ends in the centre bore 1.1 and the limited block 9, when promptly regulating bolt 8 and rotating, regulate under the effect of bolt 8 and limited block 9; Regulating block 7 is reduced to pressing down the gap that makes between regulating block 7 and the limited block 9, thereby reach the purpose that the clamping cylinder joint is also rectified the center; When regulating bolt 8 backward rotation, regulating block 7 regulating block 7 under the effect of back-moving spring 11 moves up, and makes that the gap between regulating block 7 and the limited block 9 increases, thereby reaches the purpose of unclamping cylinder connector.
Angle between described first protruding 6.1 and second protruding 6.2 is right angle (angle also can be 80 degree, 100 degree or 110 degree etc.).
Be provided with fairlead 10 in the described centre bore 1.1 to regulating block 7 one end slide-and-guides; One end of fairlead 10 nearly limited blocks 9 is positioned at centre bore 1.1; The other end of fairlead 10 is positioned at outside the centre bore 1.1; And be positioned at centre bore 1.1 outer guide sleeves 10 other end outer circumference surfaces and be provided with annular protrusion, the external diameter of annular protrusion is greater than centre bore 1.1 diameters; One end of regulating block 7 is slidingly connected in the fairlead 10.
Be provided with back-moving spring 11 between described second convexity 6.2 and the fixed disk 1; Described fixed disk 1 is provided with the spacing hole 1.2 spacing to back-moving spring 11; Described back-moving spring 11 1 ends are against on second protruding 6.2, and back-moving spring 11 other ends are against the bottom of spacing hole 1.2.
Described shifting block 6 and deck 2 hinged being meant, the end at deck 2 nearly fixed disks 1 center is provided with opening 2.1, and described shifting block 6 is hinged in the opening 2.1, and promptly shifting block 6 is hinged in the opening 2.1 through jointed shaft.
Described slide block 3 upper surfaces and claw 5 lower surfaces are equipped with the plane teeth 12 of equidistance, and the tooth pitch of the plane teeth 12 on each slide block 3 and each claw 5 is all identical, and the plane teeth 12 of slide block 3 upper surfaces and claw 5 lower surfaces is meshing with each other.
Described claw 5 is provided with mounting hole 5.1; The hole wall of described mounting hole 5.1 is provided with step 5.2; And be provided with in the mounting hole 5.1 and be used for claw 5 is fixed on the set bolt 13 on the slide block 3; Described slide block 3 upper surfaces are provided with the counterbore 3.2 of internal thread, and described set bolt 13 screw rods are crossed mounting hole 5.1 and screwed with counterbore 3.2, and set bolt 13 spiral shell heads and step 5.2 are close to.
Described claw 5 is provided with along its length protruding skidding 5.3, and the thickness of skidding 5.3 is less than the thickness of claw 5, and skidding 5.3 is positioned at the bottom of claw 5 nearly fixed disk 1 center end faces, and the lower surface of skidding 5.3 is concordant with the lower surface of claw 5.
During use, according to cylinder connector to be processed 14 claw 5 is adjusted on the desired position earlier; Subsequently fixed disk 1 is fixed on the workbench of machining center or lathe; Then cylinder connector 14 being put into, is that the first end face of cylinder connector 14 contacts with the upper surface of skidding 5.3; Re-use sleeve and rotate adjusting bolt 8, make regulating block 7 move down, regulating block 7 can drive second protruding 6.2 and rotate; And then make to win and protruding 6.1 rotate, and drive to slide and 3 move to the center of fixed disk 1, thereby make claw 5 move to the center of fixed disk 1; Until being clamped, cylinder connector 14 gets final product; Because the end face at claw 5 near fixed disks 1 center is on the circumference of same circle, and center that should circle overlaps with the center of circle of fixed disk 1, so the center of circle of cylinder connector 14 annular sections that clamped by claw 5 overlaps with the center of circle of fixed disk 1; Promptly on same vertical line, concentricity is better; After machining, regulate bolt 8 through the sleeve backward rotation, claw 5 can unclamp cylinder connector 14, and can take out the cylinder connector that machines 14 this moment.If the cylinder connector 14 of another model is added man-hour, the set bolt on the claw 5 13 is unclamped, according to the size of this model cylinder connector 14, claw 5 is transferred to suitable position and fixing can the cylinder connector 14 of this model the clamping subsequently.
Above embodiment is merely preferred embodiment of the present invention; The present invention is not limited only to above embodiment and also allows other structural change; As also can being connected between: shifting block and the slide block and between shifting block and the regulating block through the mode of tooth engagement; Allly in rights to independence claimed range of the present invention, change, all belong to protection domain of the present invention.
Claims (10)
1. cylinder connector anchor clamps; It is characterized in that: it comprises the fixed disk (1) that is used for fixing; Described fixed disk (1) upper surface is provided with at least along circumferential three decks of average mark (2); And the length direction of each deck (2) is all radially consistent with fixed disk (1), and described fixed disk (1) is provided with centre bore (1.1); Be equipped with slide block (3), chute (4) on described each deck (2) and be used for slide block (3) and move or spacing shifting block (6); Described chute (4) is positioned at the upper surface of deck (2); And the length direction of chute (4) is consistent with the length direction of deck (2); The lower end of described slide block (3) is slidingly connected in the chute (4), the removable claw (5) that is connected with in the upper end of slide block (3), and described shifting block (6) is hinged with deck (2); Be provided with in the described centre bore (1.1) and be used to control the strong center fixture that shifting block (6) rotates.
2. cylinder connector anchor clamps according to claim 1; It is characterized in that: describedly be used for that slide block (3) moves or spacing shifting block (6) is meant; Described shifting block (6) is provided with first convexity (6.1); The nearly fixed disk in described slide block (3) lower surface (1) center position is provided with groove (3.1), and the free end of described first convexity (6.1) is movably connected in the groove (3.1).
3. cylinder connector anchor clamps according to claim 1; It is characterized in that: described strong center fixture comprises regulating block (7) adjusting bolt (8) and limited block (9); The center of described regulating block (7) is provided with through hole (7.1); One end of described regulating block (7) is slidingly connected in the centre bore (1.1), and the outer circumference surface of regulating block (7) other end is provided with annular groove (7.2), and described shifting block (6) is provided with second convexity (6.2); Described second convexity (6.2) is movably connected in the annular groove (7.2); Described limited block (9) is positioned at the lower surface of fixed disk (1), and the area of limited block (9) is greater than the sectional area of centre bore (1.1), and limited block (9) is provided with screwed hole (9.1); The screw rod of described adjusting bolt (8) is crossed through hole (7.1) and screwed hole (9.1) and is screwed, and leaves the gap between described end face that is slidingly connected at regulating block (7) one ends in the centre bore (1.1) and the limited block (9).
4. according to claim 2 or 3 described cylinder connector anchor clamps, it is characterized in that: the angle between described first convexity (6.1) and second convexity (6.2) is the right angle.
5. cylinder connector anchor clamps according to claim 3 is characterized in that: be provided with the fairlead (10) to regulating block (7) one end slide-and-guides in the described centre bore (1.1).
6. cylinder connector anchor clamps according to claim 3; It is characterized in that: be provided with back-moving spring (11) between described second convexity (6.2) and the fixed disk (1); Described fixed disk (1) is provided with the spacing hole (1.2) spacing to back-moving spring (11); Described back-moving spring (11) one ends are against on second convexity (6.2), and back-moving spring (11) other end is against the bottom of spacing hole (1.2).
7. cylinder connector anchor clamps according to claim 1; It is characterized in that: described shifting block (6) and hinged being meant of deck (2); The end at nearly fixed disk (1) center of deck (2) is provided with opening (2.1), and described shifting block (6) is hinged in the opening (2.1).
8. cylinder connector anchor clamps according to claim 1; It is characterized in that: described slide block (3) upper surface and claw (5) lower surface are equipped with the plane teeth (12) of equidistance, and the plane teeth (12) of slide block (3) upper surface and claw (5) lower surface is meshing with each other.
9. cylinder connector anchor clamps according to claim 1; It is characterized in that: described claw (5) is provided with mounting hole (5.1); The hole wall of described mounting hole (5.1) is provided with step (5.2); And be provided with in the mounting hole (5.1) and be used for claw (5) is fixed on the set bolt (13) on the slide block (3); Described slide block (3) upper surface is provided with the counterbore (3.2) of internal thread, and described set bolt (13) screw rod is crossed mounting hole (5.1) and counterbore (3.2) and screwed, and set bolt (13) spiral shell head and step (5.2) are close to.
10. cylinder connector anchor clamps according to claim 9 is characterized in that: described claw (5) is provided with protruding along its length skidding (5.3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210138716.9A CN102729077B (en) | 2012-05-08 | 2012-05-08 | Clamp for cylinder joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210138716.9A CN102729077B (en) | 2012-05-08 | 2012-05-08 | Clamp for cylinder joint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102729077A true CN102729077A (en) | 2012-10-17 |
| CN102729077B CN102729077B (en) | 2015-04-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210138716.9A Active CN102729077B (en) | 2012-05-08 | 2012-05-08 | Clamp for cylinder joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102729077B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103240564A (en) * | 2013-04-26 | 2013-08-14 | 上海交通大学 | Machinery-solid phase composite connecting device and machinery-solid phase composite connecting method |
| CN103707102A (en) * | 2013-05-13 | 2014-04-09 | 莆田市荣兴机械有限公司 | Fixture for machining of thin-walled discs |
| CN105667825A (en) * | 2014-11-19 | 2016-06-15 | 中国航空工业集团公司西安飞机设计研究所 | Motion limiting device with position adjusting capacity |
| CN105666207A (en) * | 2015-12-30 | 2016-06-15 | 浙江他山流体控制科技有限公司 | Mechanical two-jaw synchronous clamp structure |
| CN106041577A (en) * | 2016-06-27 | 2016-10-26 | 海天塑机集团有限公司 | Machine tool with rapid universal pipe fitting clamping mechanism |
| CN109386693A (en) * | 2018-10-19 | 2019-02-26 | 南安艺同工业产品设计有限公司 | Rig a ship bracket automatically lock support device |
| CN109624530A (en) * | 2019-01-21 | 2019-04-16 | 宁波喜印科技有限公司 | A kind of intelligent seal with fast-assembling function |
| CN112958931A (en) * | 2021-02-24 | 2021-06-15 | 郁雅芬 | Rotating disc type water pump welding device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN106041577A (en) * | 2016-06-27 | 2016-10-26 | 海天塑机集团有限公司 | Machine tool with rapid universal pipe fitting clamping mechanism |
| CN109386693A (en) * | 2018-10-19 | 2019-02-26 | 南安艺同工业产品设计有限公司 | Rig a ship bracket automatically lock support device |
| CN109386693B (en) * | 2018-10-19 | 2020-10-16 | 惠安县锋创商贸有限公司 | Automatic locking and supporting device for ship hoisting bracket |
| CN109624530A (en) * | 2019-01-21 | 2019-04-16 | 宁波喜印科技有限公司 | A kind of intelligent seal with fast-assembling function |
| CN112958931A (en) * | 2021-02-24 | 2021-06-15 | 郁雅芬 | Rotating disc type water pump welding device |
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|---|---|
| CN102729077B (en) | 2015-04-15 |
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Owner name: NINGBO TONGDA PRECISION CASTING CO., LTD. Free format text: FORMER OWNER: NINGBO WEIRONG AUTO PARTS MANUFACTURING CO., LTD. Effective date: 20150226 |
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