CN102729077B - Clamp for cylinder joint - Google Patents
Clamp for cylinder joint Download PDFInfo
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- CN102729077B CN102729077B CN201210138716.9A CN201210138716A CN102729077B CN 102729077 B CN102729077 B CN 102729077B CN 201210138716 A CN201210138716 A CN 201210138716A CN 102729077 B CN102729077 B CN 102729077B
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- block
- fixed disk
- claw
- projection
- 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 frock clamp field, particularly relate to a kind of clamp for cylinder joint for cylinder connector processing.
Background technology
At present, prior art cylinder connector, in process, uses common universal fixturing, first with pressing plate, cylinder connector is compressed gently during use, use hand deemphasis center again, and the center of cylinder connector needs workman to estimate determines, with spanner, pressing plate is compressed and can process subsequently.But this clamp for cylinder joint is when strong center, easy landing and the industrial accident making operator injured, safety in utilization is poor; Simultaneously ocular estimate rectifys center, causes concentricity to regulate more loaded down with trivial details, and concentricity after regulating is poor, and the yield rate of work pieces process is lower, causes production cost higher; Moreover when needing the cylinder connector processing different size, need the pressing plate of different size, operate more loaded down with trivial details, fixture 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, comparatively simple, the concentricity of operation better and be produced into lower clamp for cylinder joint.
The present invention overcomes the above problems technical scheme used: provide a kind of clamp for cylinder joint with following structure, it comprises for fixing fixed disk, described fixed disk upper surface is provided with at least three decks be circumferentially evenly distributed, and the length direction of each deck is all radial consistent with fixed disk, described fixed disk is provided with centre bore; Described each deck be equipped with slide block, chute and move for slide block 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 slide of described slide block is connected in chute, the upper end of slide block is removable is connected with claw, described shifting block and deck hinged; The strong center fixture rotated for controlling shifting block is provided with in described centre bore.
After adopting above structure, compared with prior art, the present invention is owing to being provided with at least circumferentially average mark three decks in fixed disk upper surface, and the length direction of each deck is all radial consistent with fixed disk, described each deck be equipped with slide block, chute and move for slide block 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 slide of described slide block is connected in chute, the upper end of slide block is removable is connected with claw, described shifting block and deck hinged, the strong center fixture rotated for controlling shifting block is provided with in described centre bore, then each claw is fixed on after on slide block, the end face in the nearly fixed disk of each claw is made to form the external diameter of circle slightly larger than cylinder connector along fixed disk circumference, subsequently cylinder connector is put into, by rectifying center fixture, shifting block is rotated again, and then shifting block band movable slider, and slide block drives claw to move along the radial direction of fixed disk to the fixed disk center of circle, until the outer circumference surface of end face in the nearly fixed disk of each claw and cylinder connector annular is close to and cylinder connector can be clamped, and the axis of the axis of cylinder connector annular section and fixed disk on the same line, therefore after cylinder connector puts into, rectify center without the need to manually rectifying center again by mechanical device, cylinder connector is landing not easily, and also just not easily occur the industrial accident making operator injured, security adds, concentricity relies on mechanical device to regulate, and make operation comparatively simple, concentricity is better, during as pressed from both sides the cylinder connector of different model, only need regulate the position of strong center fixture or claw, without the need to changing any parts, simple to operate, equipment cost is also lower, and then makes production cost lower.Therefore the present invention have safety in utilization better, comparatively simple, the concentricity of operation better and be produced into lower feature.
As improvement, described to move for slide block or spacing shifting block refers to, described shifting block is provided with the first projection, the nearly fixed disk center position in described slide block lower surface is provided with groove, and the free end of the first described projection is movably connected in groove, then the shifting block of this structure and the manufacturing cost of slide block lower, durable, and shifting block can promptly by slipper push or spacing, when making use of the present invention, flexibility and stability all add, and manufacturing cost is lower.
As further improvement, described strong center fixture comprises regulating block adjusting bolt and limited block, the center of described regulating block is provided with through hole, one end of described regulating block is slidably connected in centre bore, the outer circumference surface of the regulating block other end is provided with annular groove, described shifting block is provided with the second projection, the second described projection is movably connected in annular groove, described limited block is positioned at the lower surface of fixed disk, 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, gap is left between the described end face being slidably connected at the regulating block one end in centre bore and limited block, then the strong center fixture structure of this structure is simpler, preparation cost is lower, better working stability, therefore preparation cost of the present invention is reduced further, job stability improves further.
As improving further, the angle between the first described projection and the second projection is right angle, the length of the second projection can be dropped to the shortest again, therefore the compactedness of structure of the present invention can be made better, and overall volume is less, facilitates workman to dismantle the present invention.
As improving further again, the fairlead to regulating block one end slide-and-guide is provided with in described centre bore, when then fairlead can make regulating block slide, directionality is better, not easily offset or rock, and then make regulating block more stable to the effect of setting ahead, the response speed set ahead is also very fast, and time static, regulating block is spacing more firm to what set ahead, thus make the present invention in use stability improve further again.
As improving further again, back-moving spring is provided with between the second described projection and fixed disk, described fixed disk is provided with the spacing hole spacing to back-moving spring, described back-moving spring one end is against in the second projection, the back-moving spring other end is against the bottom of spacing hole, then when regulating block rises, under the effect of back-moving spring, shifting block can be rapidly to rotation, thus claw is promptly thrown off with cylinder connector, the cylinder connector machined can be moved away from the very first time by workman, to carry out the processing of next cylinder connector quickly, and then arrive the object improving cylinder connector working (machining) efficiency.
As improving further again, described described shifting block and deck is hinged refers to, the end at the nearly fixed disk of deck (1) center is provided with opening, described shifting block is hinged in opening, the jointed shaft between shifting block and deck and deck then can be made to have two stress points, larger gravity can be born, prevent the situation of jointed shaft fracture in process from occurring, thus stability in use of the present invention and security are provided further.
As improving further again, described upper end of slide block face and claw lower surface are equipped with equidistant plane teeth, and the plane teeth of upper end of slide block face and claw lower surface engages each other, plane teeth refers to the multiple teeth arranged in the plane, generally the method for roll extrusion is adopted to manufacture in the plane, then when regulating, each claw can be regulated according to the number of teeth, and without the need to re-use range finding mode to regulate claw, operate simpler, and the concentricity of each claw after regulating is better, and then after making claw clamping cylinder joint, the concentricity of cylinder connector and fixed disk is also better.
As improving further again, described claw is provided with mounting hole, mounting hole is also referred to as waist-shaped hole or runway nibs, the hole wall of described mounting hole is provided with step, and the set bolt be provided with in mounting hole for claw being fixed on slide block, female counterbore is established in described upper end of slide block face, described set bolt screw rod crosses mounting hole and counterbore screws, and set bolt spiral shell head and step are close to, the then setting of mounting hole, can regulate claw after making to unclamp set bolt, and no longer need completely set bolt to be selected completely, make operation simpler, and also without the need to arranging multiple screwed hole to meet the adjustment of claw on slide block, preparation cost is lower, and the setting that the hole wall of mounting hole is topped bar, making the spiral shell head of set bolt be positioned at waist-shaped hole, preventing workman from touching the spiral shell head of set bolt and injured when placing cylinder connector, improve safety in utilization of the present invention further.
As further improving, described claw is provided with skidding protruding along its length, then when putting into cylinder connector, the lower surface of cylinder connector contacts with skidding, prevents the lower surface of cylinder connector from contacting with the plane teeth on slide block, and makes plane teeth suffer breakage, cause claw fixing unstable, even occur situation about cannot fix, make longer service life of the present invention, stability is better.
Accompanying drawing explanation
Fig. 1 is the structural representation of clamp for cylinder joint of the present invention.
Fig. 2 is the structural representation of clamp for cylinder joint claw of the present invention.
Fig. 3 is the structural representation of clamp for cylinder joint 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 is protruding, and 6.2, second is protruding, 7, regulating block, 7.1, through hole, 7.2, annular groove, 8, adjusting bolt, 9, limited block, 9.1, screwed hole, 10, fairlead, 11, back-moving spring, 12, plane teeth, 13, set bolt, 14, cylinder connector.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described further.
A clamp for cylinder joint as shown in Figure 1, Figure 2 and Figure 3, it comprises for fixing fixed disk 1, described fixed disk 1 upper surface is provided with at least circumferentially average mark three decks 2, and (this example is three, also can be four, five, six or seven etc.), and the length direction of each deck 2 is all radial consistent with fixed disk 1, all at same circle circumferentially, described fixed disk 1 is provided with centre bore 1.1 at the center of each deck 2; Described each deck 2 be equipped with slide block 3, chute 4 and move for slide block 3 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 slide of described slide block 3 is connected in chute 4, the upper end of slide block 3 is removable is connected with claw 5, and described shifting block 6 is hinged with deck 2; The strong center fixture rotated for controlling shifting block 6 is provided with in described centre bore 1.1.
Described to move for slide block 3 or spacing shifting block 6 refers to, described shifting block 6 is provided with the first projection 6.1, described slide block 3 lower surface nearly fixed disk 1 center position is provided with groove 3.1, the free end of the first described projection 6.1 is movably connected in groove 3.1, namely the free end of the first projection 6.1 is positioned at groove 3.1, when shifting block 6 rotates, first projection 6.1 by groove 3.1 with movable slider 3 moving radially along fixed disk 1, and when shifting block 6 is static, first protruding 6.1 is spacing by groove 3.1 pairs of slide blocks 3, and anti-limited slip block 3 moves.
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 slidably connected in centre bore 1.1, the outer circumference surface of regulating block 7 other end is provided with annular groove 7.2, described shifting block 6 is provided with the second projection 6.2, the second described projection 6.2 is movably connected in annular groove 7.2, namely the free end of the second projection 6.2 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 is greater than the sectional area of centre bore 1.1, ensure that limited block 9 can not enter in 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 is screwed with screwed hole 9.1, gap is left between the described end face being slidably connected at regulating block 7 one end in centre bore 1.1 and limited block 9, namely when adjusting bolt 8 is rotated, adjusting bolt 8 is with under the effect of limited block 9, to pressing down, the gap between regulating block 7 and limited block 9 is reduced regulating block 7, thus reach clamping cylinder joint and the object at strong center, when adjusting bolt 8 rotates backward, regulating block 7 regulating block 7 under the effect of back-moving spring 11 moves up, and the gap between regulating block 7 and limited block 9 is increased, thus reaches the object of unclamping cylinder connector.
Angle between described first protruding 6.1 and second projection 6.2 is right angle (angle also can be 80 degree, 100 degree or 110 degree etc.).
The fairlead 10 to regulating block 7 one end slide-and-guide is provided with in described centre bore 1.1, one end of the nearly limited block 9 of fairlead 10 is positioned at centre bore 1.1, the other end of fairlead 10 is positioned at outside centre bore 1.1, and be positioned at centre bore 1.1 outer guide sleeve 10 other end outer circumference surface and be provided with annular protrusion, the external diameter of annular protrusion is greater than centre bore 1.1 diameter; One end of regulating block 7 is slidably connected in fairlead 10.
Back-moving spring 11 is provided with between described second protruding 6.2 and 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 end is against in the second projection 6.2, and back-moving spring 11 other end is against the bottom of spacing hole 1.2.
Described shifting block 6 refers to deck 2 is hinged, and 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 opening 2.1, and namely shifting block 6 is hinged in opening 2.1 by jointed shaft.
Described slide block 3 upper surface and claw 5 lower surface are equipped with equidistant plane teeth 12, 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 surface and claw 5 lower surface engages 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 the set bolt 13 be provided with in mounting hole 5.1 for claw 5 being fixed on slide block 3, female counterbore 3.2 is established in described slide block 3 upper surface, described set bolt 13 screw rod is crossed mounting hole 5.1 and is screwed with counterbore 3.2, and set bolt 13 spiral shell head and step 5.2 are close to.
Described claw 5 is provided with skidding 5.3 protruding along its length, 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 face, and the lower surface of skidding 5.3 is concordant with the lower surface of claw 5.
During use, first according to cylinder connector 14 to be processed, claw 5 is adjusted on desired position, subsequently fixed disk 1 is fixed on the workbench of machining center or lathe, then being put into by cylinder connector 14, 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, regulating block 7 is moved down, regulating block 7 can drive the second projection 6.2 to rotate, and then make first protruding 6.1 to rotate, and move with the center of movable slider 3 to fixed disk 1, thus claw 5 is moved to the center of fixed disk 1, until cylinder connector 14 is clamped, due to nearly fixed disk 1 center of claw 5 end face at same circle circumferentially, and the center of this circle overlaps with the center of circle of fixed disk 1, therefore the center of circle of cylinder connector 14 annular section clamped by claw 5 overlaps with the center of circle of fixed disk 1, namely on same vertical line, concentricity is better, after machining, rotate backward adjusting bolt 8 by sleeve, claw 5 can unclamp cylinder connector 14, now the cylinder connector 14 machined can be taken out.If man-hour will be added to the cylinder connector 14 of another model, the set bolt 13 on claw 5 is unclamped, subsequently according to the size of this model cylinder connector 14, claw 5 is transferred to suitable position and fixes and can clamp the cylinder connector 14 of this model.
Above embodiment is only preferred embodiment of the present invention; the present invention is not limited only to above embodiment and has also allowed other structure to change; as: be also connected by the mode of tooth engagement between shifting block with slide block and between shifting block with regulating block; allly to change in rights to independence claimed range of the present invention, all belong to scope.
Claims (4)
1. a clamp for cylinder joint, it is characterized in that: it comprises for fixing fixed disk (1), described fixed disk (1) upper surface is provided with at least three decks be circumferentially evenly distributed (2), and the length direction of each deck (2) is all radial consistent with fixed disk (1), described fixed disk (1) is provided with centre bore (1.1), described each deck (2) is equipped with slide block (3), chute (4) and for the mobile or spacing shifting block (6) of slide block (3), 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 slide of described slide block (3) is connected in chute (4), the upper end of slide block (3) is removable is connected with claw (5), and described shifting block (6) is hinged with deck (2), the strong center fixture rotated for controlling shifting block (6) is provided with in described centre bore (1.1), the described shifting block (6) mobile or spacing for slide block (3) refers to, described shifting block (6) is provided with the first projection (6.1), described slide block (3) lower surface nearly fixed disk (1) center position is provided with groove (3.1), and the free end of described the first projection (6.1) is movably connected in groove (3.1), 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 slidably connected in centre bore (1.1), the outer circumference surface of regulating block (7) other end is provided with annular groove (7.2), described shifting block (6) is provided with the second projection (6.2), described the second projection (6.2) is movably connected in annular groove (7.2), described limited block (9) is positioned at the lower surface of fixed disk (1), 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 is screwed with screwed hole (9.1), gap is left between the described end face being slidably connected at regulating block (7) one end in centre bore (1.1) and limited block (9), back-moving spring (11) is provided with between described the second projection (6.2) and 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 end is against in the second projection (6.2), and back-moving spring (11) other end is against the bottom of spacing hole (1.2), described slide block (3) upper surface and claw (5) lower surface are equipped with equidistant plane teeth (12), and the plane teeth (12) of slide block (3) upper surface and claw (5) lower surface engages 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 the set bolt (13) be provided with in mounting hole (5.1) for claw (5) being fixed on slide block (3), female counterbore (3.2) is established in described slide block (3) upper surface, described set bolt (13) screw rod is crossed mounting hole (5.1) and is screwed with counterbore (3.2), and set bolt (13) spiral shell head and step (5.2) are close to, described claw (5) is provided with skidding (5.3) protruding along its length.
2. clamp for cylinder joint according to claim 1, is characterized in that: the angle between described the first projection (6.1) and the second projection (6.2) is right angle.
3. clamp for cylinder joint according to claim 1, is characterized in that: be provided with the fairlead (10) to regulating block (7) one end slide-and-guide in described centre bore (1.1).
4. clamp for cylinder joint according to claim 1, it is characterized in that: described shifting block (6) refers to deck (2) is hinged, 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 opening (2.1).
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 CN102729077A (en) | 2012-10-17 |
| CN102729077B true 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 |
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| CN (1) | CN102729077B (en) |
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| CN103240564B (en) * | 2013-04-26 | 2016-04-13 | 上海交通大学 | Machinery-solid phase composite connecting device and attaching method thereof |
| CN103707102B (en) * | 2013-05-13 | 2015-12-02 | 莆田市荣兴机械有限公司 | The clamp for machining of thin-walled disk-like accessory |
| CN105667825B (en) * | 2014-11-19 | 2018-04-03 | 中国航空工业集团公司西安飞机设计研究所 | A kind of restraint device with position adjustments ability |
| CN105666207B (en) * | 2015-12-30 | 2018-01-12 | 浙江他山流体控制科技有限公司 | A kind of two pawl synchronous fixture structures of machinery |
| 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 |
| 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 |
| CN109624530B (en) * | 2019-01-21 | 2020-05-29 | 宁波喜印科技有限公司 | Intelligent stamp with fast-assembling function |
| CN112958931B (en) * | 2021-02-24 | 2022-08-19 | 海城三鱼泵业有限公司 | Rotating disc type water pump welding device |
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| US3560010A (en) * | 1969-02-06 | 1971-02-02 | Woodworth Co N A | Jaw mounting for chucks |
| US3771804A (en) * | 1971-03-18 | 1973-11-13 | W Platt | Compound chuck structure |
| CH558694A (en) * | 1973-04-12 | 1975-02-14 | Metrology Systems Corp | PRESSURE ACTUATED CLAMPING DEVICE FOR MACHINE TOOLS. |
| CN2829946Y (en) * | 2005-09-30 | 2006-10-25 | 中信重型机械公司 | Eight-claw auto centering clamping device of vertically working ring |
| CN200963695Y (en) * | 2006-11-14 | 2007-10-24 | 沈永才 | Automatic light and fast clamp |
| CN100364703C (en) * | 2006-03-14 | 2008-01-30 | 浙江大学 | Jack catch for clamping workpiece or cutting tool |
| CN202006288U (en) * | 2011-02-19 | 2011-10-12 | 洪青强 | Fast clamping chuck |
| CN202517308U (en) * | 2012-05-08 | 2012-11-07 | 宁波伟荣汽车配件制造有限公司 | Fixture for joint of oil cylinder |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3560010A (en) * | 1969-02-06 | 1971-02-02 | Woodworth Co N A | Jaw mounting for chucks |
| US3771804A (en) * | 1971-03-18 | 1973-11-13 | W Platt | Compound chuck structure |
| CH558694A (en) * | 1973-04-12 | 1975-02-14 | Metrology Systems Corp | PRESSURE ACTUATED CLAMPING DEVICE FOR MACHINE TOOLS. |
| CN2829946Y (en) * | 2005-09-30 | 2006-10-25 | 中信重型机械公司 | Eight-claw auto centering clamping device of vertically working ring |
| CN100364703C (en) * | 2006-03-14 | 2008-01-30 | 浙江大学 | Jack catch for clamping workpiece or cutting tool |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN102729077A (en) | 2012-10-17 |
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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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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20150226 Address after: 315135, Zhejiang, Ningbo province Yinzhou District Yunlong Town Lotus Bridge Village Applicant after: Ningbo Tongda Precision Casting Co., Ltd. Address before: 315135, Zhejiang, Ningbo province Yinzhou District Yunlong Town Lotus Bridge Village Applicant before: Ningbo Weirong Auto Parts Manufacture Co., Ltd. |
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| C14 | Grant of patent or utility model | ||
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