CN114346937A - Clamping mechanism and clamping method - Google Patents
Clamping mechanism and clamping method Download PDFInfo
- Publication number
- CN114346937A CN114346937A CN202210077548.0A CN202210077548A CN114346937A CN 114346937 A CN114346937 A CN 114346937A CN 202210077548 A CN202210077548 A CN 202210077548A CN 114346937 A CN114346937 A CN 114346937A
- Authority
- CN
- China
- Prior art keywords
- pressing
- axial
- expansion
- driving cylinder
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000003825 pressing Methods 0.000 claims abstract description 105
- 239000002184 metal Substances 0.000 claims abstract description 47
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 230000009471 action Effects 0.000 claims abstract description 5
- 238000004891 communication Methods 0.000 claims description 9
- 230000009467 reduction Effects 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- 230000006835 compression Effects 0.000 description 11
- 238000007906 compression Methods 0.000 description 11
- 238000012545 processing Methods 0.000 description 6
- 239000000725 suspension Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Images
Landscapes
- Jigs For Machine Tools (AREA)
Abstract
The utility model relates to a clamping mechanism and a clamping method. The novel water pump solves the defects of large volume, unreasonable internal expansion design and the like in the prior art. The clamping mechanism comprises a positioning jig; the radially inner tensioning elastic piece is cylindrical and is fixed on the positioning jig; the inner expansion driving cylinder penetrates through the radial inner expansion elastic part, a wedge-shaped transmission structure is arranged between the inner expansion driving cylinder and the radial inner expansion elastic part, and the inner expansion driving cylinder moves axially towards the expansion direction relative to the radial inner expansion elastic part and is forced to expand the radial inner expansion elastic part outwards under the action of the wedge-shaped transmission structure; the axial pressing piece is matched with the positioning jig so as to press the metal frame; the pressing driving rod penetrates through the inner expansion driving cylinder, and the axial pressing piece is driven by the pressing driving rod to axially move in the radial inner expansion elastic piece. The utility model has the advantages that: saving space and ensuring the inner expansion to be in place.
Description
Technical Field
The utility model belongs to the technical field of 3C product processing jigs, and particularly relates to a clamping mechanism and a clamping method.
Background
Along with the continuous development of mobile terminal technology, the application of electronic equipment such as smart phones, palm computers, smart watches and the like is very common and becomes an important component in work and life of people.
The metal middle frame has the characteristics of weak structure and high appearance requirement, and the traditional processing mode of the metal middle frame generally comprises the following three methods: 1. appearance is prior, and finally blanking is performed; the process has the disadvantages that the product is easy to deform and the inner length and width are not proportional; 2. the inner cavity is preferred, a product is clamped in a hamburger-like mode, and the shape is processed; the process has the disadvantages of long processing time and relatively high cost; 3. the inner cavity is preferred, the inner supporting mechanism supports the side wall of the inner cavity of the product, and the shape is processed; the process has the disadvantages that a, the supporting surfaces of the inner cavities of the products are different in size, so that the products cannot be effectively matched; b. the product structure is weak, has the risk of overstrain or not reaching the position to lead to the product deformation or wrench movement, maintain the difficulty. For example, the inventor designs a mechanical tensioning device, application No. CN200920218039.5, which includes a slider, the slider is in threaded connection with a suspension ring, a hook at one end of a tension spring hooks the suspension ring, the other end of the tension spring hooks the other suspension ring, the other suspension ring is in threaded connection with a connecting piece, the connecting piece is connected with a guide plate by a countersunk screw, the guide plate is welded with a hollow shaft, the hollow shaft is connected with a screw rod by a bearing, the screw rod is connected with a rack by a thread or a trapezoidal thread, and the rack is connected with a wedge ring by a countersunk screw. The utility model has the advantages that the rack and the wedge ring connected with the rack are driven by the screw to move along the axial direction of the screw, and the plurality of sliding blocks uniformly distributed in the circumferential direction are jacked up by the wedge ring, so that the sliding blocks slide out along the radial direction of the T-shaped groove in the guide disc, the end heads of the sliding blocks support the inner wall of the welding seam of the cylinder to be welded, and the welding seam part of the cylinder is supported.
Although the radial internal expansion can be realized by the scheme, the internal expansion is in sliding fit and needs to be rotated forward and backward to realize the internal expansion and cancel the internal expansion, the structure is complex, the operation is more complicated, and the driving mode is difficult to be used for the internal expansion of the metal middle frame of the 3C product because the metal middle frame cannot be accurately internally supported in place or excessively outwards expanded.
Secondly, the existing split design of radial inward tensioning and axial locking causes the whole structure to occupy larger space, and cannot ensure that the axial lead of the axial locking after the radial inward tensioning is superposed with the axial lead of the inward tensioning piece, so that the processing precision of the metal middle frame is poor, the rejection rate is high, and the final assembly precision is influenced.
Disclosure of Invention
The present invention is directed to solving the above problems, and an object of the present invention is to provide a clamping mechanism and a clamping method that can solve the above problems.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the clamping mechanism comprises a positioning jig;
the radially inner tensioning elastic piece is cylindrical and is fixed on the positioning jig;
the inner expansion driving cylinder penetrates through the radial inner expansion elastic part, a wedge-shaped transmission structure is arranged between the inner expansion driving cylinder and the radial inner expansion elastic part, and the inner expansion driving cylinder moves axially towards the expansion direction relative to the radial inner expansion elastic part and is forced to expand the radial inner expansion elastic part outwards under the action of the wedge-shaped transmission structure;
the axial pressing piece is matched with the positioning jig so as to press the metal frame;
the pressing driving rod penetrates through the inner expansion driving cylinder and drives the axial pressing piece to axially move in the radial inner expansion elastic piece; the pressing driving rod drives the axial pressing piece to be close to the metal frame arranged on the positioning jig, and the axial pressing piece presses the metal frame on the positioning jig.
In the clamping mechanism, the radially inward tensioning elastic part comprises a cylindrical part, one end of the cylindrical part is fixed on the positioning jig, the other end of the cylindrical part extends out of the positioning jig, a plurality of pressure reduction grooves are formed in the circumferential direction of the other end of the cylindrical part, an elastic part is formed between every two adjacent pressure reduction grooves, each elastic part is vertically connected with an inward expansion block, the elastic part is located in a first through hole of the positioning jig, and a gap is reserved between the elastic part and the first through hole.
In the clamping mechanism, the wedge-shaped transmission structure comprises an inner wedge-shaped surface arranged on the inner wall of the elastic part, an outer wedge-shaped surface in contact with the inner wedge-shaped surface is arranged on the outer wall of the inner expansion driving cylinder, and when the inner expansion driving cylinder moves towards the positioning jig, the outer wedge-shaped surface extrudes the inner wedge-shaped surface so as to force the inner expansion block connected to the elastic part to radially and outwardly displace.
In the clamping mechanism, the inner expansion blocks and the positioning surface of the positioning jig are distributed at intervals. Or both may be in sliding contact.
In the clamping mechanism, the axial pressing piece is positioned on one surface of the inner expansion block, which is far away from the positioning surface of the positioning jig, and the axial pressing piece and the other surface of the inner expansion block are distributed at intervals.
In the clamping mechanism, a third through hole is formed in the axial center of the axial pressing piece, the upper end of the pressing driving rod penetrates into the third through hole, a detachable piece is connected to the upper end of the pressing driving rod in a threaded mode, and the cap end of the detachable piece is pressed on the upper hole opening of the third through hole.
In the clamping mechanism, the through hole III comprises a central hole and a lateral communication avoiding groove which is laterally communicated with the central hole, and the inner diameter of the lateral communication avoiding groove at the communication position with the central hole is larger than the aperture of the central hole.
In the clamping mechanism, the axial pressing piece comprises an outer pressing frame, an embedded pressing block with a third through hole is arranged in the outer pressing frame, and the outer circumferential surface of the embedded pressing block is tightly attached to the inner wall surface of the outer pressing frame.
In the clamping mechanism, a guide structure for guiding the axial movement of the axial pressing piece in the radial inner expansion and tightening elastic piece is arranged between the axial pressing piece and the positioning jig.
In the clamping mechanism, one end of the internal expansion driving cylinder, which is close to the positioning jig, extends out of the positioning jig, and the end of the internal expansion driving cylinder, which extends out of the positioning jig, is connected with an internal expansion driving device which drives the internal expansion driving cylinder to move in the axial direction of the radial internal expansion elastic part.
In the clamping mechanism, the inner expansion driving device comprises a moving frame connected with one end of the inner expansion driving cylinder extending out of the positioning jig, an inner expansion driver connected with the moving frame is fixed on the positioning jig, and the inner expansion driver drives the inner expansion driving cylinder connected with the moving frame to move axially.
In the clamping mechanism, one end of the pressing driving rod, which is close to the positioning jig, extends out of the positioning jig, and a pressing driver connected with one end of the pressing driving rod, which extends out of the positioning jig, is fixed on the positioning jig.
The clamping method adopts the clamping mechanism, and comprises the following steps:
s1, placing, namely placing the metal frame on the positioning surface of the positioning jig;
s2, radial tensioning is carried out, the inner tensioning driving cylinder moves towards the set tensioning direction, the elastic part of the radially inner tensioning elastic part is forced to deform radially outwards and drives the inner tensioning block to displace radially outwards, and finally the inner tensioning block is in contact with the inner wall of the metal frame for tensioning;
and S3, axially locking, wherein the pressing driving rod moves towards the axial locking direction, so that the axial pressing piece is forced to be close to the metal frame in the step S2 and is pressed at the other axial end of the metal frame, which is far away from the positioning jig.
Compared with the prior art, the clamping mechanism has the advantages that:
1. compact structure and small, radial internal expanding compact elasticity piece, internal expanding driving cylinder and axial compress tightly the synergism of piece, rise and tightly be in the same place with two kinds of structures of axial centre gripping, can exert drive power in a direction, when realizing the centre gripping, do not occupy the exterior space to the convenience is processed the operation to the product outside.
2. The axial compression perpendicular to the axial direction of the metal middle frame can be ensured after the metal middle frame is expanded and tightened inwards, so that the metal middle frame is accurately compressed, and the metal middle frame is prevented from being compressed and deviated due to the fact that the radial inwards expanded axial lead and the compressed axial lead have deviation.
3. By means of the design of the radially inner tensioning elastic piece, the inner tensioning can be ensured to be in place, the phenomenon that the inner tensioning is not in place or excessively expands outwards and inwards is avoided, and the original radial size precision of the metal middle frame can be ensured.
4. By utilizing the radially inner tensioning elastic piece, the inner tensioning can be automatically cancelled, so that the production and processing efficiency is improved.
Drawings
Fig. 1 is a schematic perspective view of a clamping mechanism provided in the present invention.
Fig. 2 is a schematic structural diagram of a clamping mechanism provided by the utility model.
Fig. 3 is a schematic longitudinal sectional structure of the clamping mechanism provided by the utility model.
Fig. 4 is a schematic diagram of a transverse cross-sectional structure of the clamping mechanism provided by the utility model.
Fig. 5 is an exploded view of a part of the clamping mechanism provided by the utility model.
Fig. 6 is a schematic structural diagram of a metal middle frame provided by the utility model.
Fig. 7 is an enlarged schematic view of a portion a in fig. 3.
In the figure, a positioning jig 1, a positioning pin 10, a bracket 11, a connecting bolt 12, a first through hole 13, a hole expanding 130, a guide column 14, a radial inner tensioning elastic part 2, a cylindrical part 20, an elastic part 21, an inner tensioning block 22, an inner wedge-shaped surface 23, an outer plane 24, an upper end axial limiting convex part 25, a lower axial limiting block 26, a transverse bolt 27, a pressure reducing hole 28, an inner tensioning driving cylinder 3, an outer wedge-shaped surface 30, an axial pressing part 4, a guide sleeve 40, an outer pressing frame 41, an embedded pressing block 42, a third through hole 43, a pressing driving rod 5, a detachable part 50, an inner tensioning driving device 6, a moving frame 60, an inner tensioning driver 61, a pressing driver 7 and a metal middle frame a are arranged.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
Example one
As shown in fig. 1-3 and 6, the clamping mechanism includes a positioning fixture 1, a radially inward-expanding elastic member 2, an inward-expanding driving cylinder 3, an axial pressing member 4, and a pressing driving rod 5, and taking the vertical direction as an example, a positioning surface is provided on the top surface of the positioning fixture 1 for positioning a metal middle frame a, i.e., the metal middle frame a is sleeved on the top of the positioning fixture 1 and attached to the positioning surface, as shown in fig. 5, and a plurality of positioning pins 10 are provided on the positioning surface for pairing with a plurality of mounting holes a1 on the inner wall of the metal middle frame a, thereby achieving the purpose of positioning the metal middle frame a.
Next, in order to facilitate the installation of the jig, as shown in fig. 1 to 3, the positioning jig 1 of the present embodiment is fixed on the bracket 11 having an inverted U shape, so that various driving sources can be conveniently installed inside the bracket 11. The positioning jig 1 can be fixed on the bracket 11 through the connecting bolts 12 by the positioning jig 1.
As shown in fig. 7, a first through hole 13 is formed in the center of the positioning fixture 1, and a second through hole communicated with the first through hole is formed in the bracket 11, so that subsequent inward expansion and pressing installation are facilitated, and meanwhile, the first through hole 13 can achieve the limiting purpose of excessive outward and inward expansion.
As shown in fig. 2 and 7, the radially inner tensioning elastic member 2 is cylindrical and fixed to the positioning fixture 1. The specific fixed knot constructs and is: the lower extreme that rises in the footpath tight elastic component 2 that rises in is fixed in through-hole one through the axial fixity structure, and tight elastic component 2 and a through-hole week fixed and axial fixity rise in the footpath, specifically, be equipped with an at least internal plane at the inner wall of through-hole one, be fixed in one end outer wall of through-hole one at tight elastic component 2 that rises in the footpath be equipped with the anastomotic outer plane 24 of inner plane, inner plane and outer planar coincide and realize circumference fixedly, and simultaneously, the axial fixity structure includes: the fixed side of the outer plane and the radially inner tensioning elastic part 2 form an upper end axial limiting convex part 25, the upper end axial limiting convex part 25 is clamped at an upper hole opening of the first through hole to fix one end of the axial direction, the lower end of the radially inner tensioning elastic part 2 extends out of a lower hole opening of the first through hole, a lower axial limiting block 26 is sleeved at the lower end of the radially inner tensioning elastic part 2, the lower axial limiting block 26 abuts against the lower hole opening of the first through hole to achieve axial fixing of the other end, and the above structure can prevent the radially inner tensioning elastic part 2 from axially moving and achieve the purpose of circumferential fixing to prevent the radially inner tensioning elastic part 2 from freely rotating in the circumferential direction.
In order to provide the recess, a recess groove 15 is provided on the top side of the support 11 for the insertion of the lower axial stop 26.
Further, a lower annular groove is formed in the outer wall of the lower end of the radially inward tensioning elastic member 2, the lower axial limiting block 26 is annular and is sleeved at the lower end of the radially inward tensioning elastic member 2, an inner annular ring extending into the lower annular groove is formed in the inner wall of the lower axial limiting block 26 to connect the radially inward tensioning elastic member 2 and the lower axial limiting block 26, the lower axial limiting block 26 is fixed directly through a plurality of transverse bolts 27, and the transverse bolts 27 can be replaced by transverse pins.
And the upper end of the through hole I13 is provided with a reaming hole 130, and a deformation gap is reserved between the outer wall of the upper end of the radially inner tensioning elastic part 2 and the reaming hole so as to be beneficial to the deformation of the radially inner tensioning elastic part 2.
The inner expansion driving cylinder 3 is arranged in the radial inner expansion elastic part 2 in a penetrating mode, and the axial lead of the inner expansion driving cylinder 3 is overlapped with the axial lead of the radial inner expansion elastic part 2. And a wedge-shaped transmission structure is arranged between the inner expansion driving cylinder 3 and the radial inner expansion elastic part 2, the inner expansion driving cylinder 3 axially moves towards the expansion direction relative to the radial inner expansion elastic part 2 and forces the radial inner expansion elastic part 2 to expand outwards under the action of the wedge-shaped transmission structure.
In the above-mentioned limited vertical direction, the tensioning direction in this embodiment is downward movement.
The axial pressing piece 4 is axially and relatively moved to the radial inner tensioning elastic piece 2 in the radial inner tensioning elastic piece 2. The axial pressing piece 4 presses on the axial upper end face of the metal middle frame a to match with the positioning face so as to press the metal middle frame in the axial direction. The axial pressing piece 4 is matched with the positioning jig 1 so as to press the metal frame a.
As shown in fig. 3-5 and 7, the pressing driving rod 5 is inserted into the inner expanding driving cylinder 3, and the axial line of the pressing driving rod 5 coincides with the axial line of the inner expanding driving cylinder 3, and when the pressing driving rod 5 moves in the axial pressing direction relative to the inner expanding driving cylinder 3, the axial pressing member 4 and the pressing driving rod 5 are forced to move in the same direction to achieve the purpose of pressing. Namely, the pressing driving rod 5 drives the axial pressing piece 4 to tension the axial movement of the elastic piece 2 in the radial direction; the pressing driving rod 5 drives the axial pressing piece 4 to be close to the metal frame a arranged on the positioning jig 1, and the axial pressing piece 4 presses the metal frame a on the positioning jig 1.
The coincidence of the three axial lines adopted in this embodiment can ensure that the axial compression of the metal center frame after the metal center frame is expanded and tightened in the interior is perpendicular to the axial line of the metal center frame to ensure that the metal center frame is accurately compressed, so as to prevent that the expanded and supported in the metal center frame a and the axial compression can not form a perpendicular state due to the deviation of the radially expanded and compressed axial lines in the interior, and influence on the processing quality of the final metal center frame.
Specifically, the radially inward expanding elastic member 2 of the present embodiment is an integrated radially inward expanding elastic member, the radially inward expanding elastic member 2 includes a cylindrical portion 20, the cylindrical portion 20 is fixed in the first through hole of the positioning fixture 1 by the above-mentioned axial positioning structure, one end of the cylindrical portion 20 is fixed to the positioning fixture 1, a plurality of pressure relief grooves 200 are formed in the circumferential direction of the other end of the cylindrical portion 20, an elastic portion 21 is formed between two adjacent pressure relief grooves, and each elastic portion 21 is vertically connected to an inward expanding block 22.
The resilient portion 21 is in the counterbore described above, with a gap being provided between the outer wall of the resilient portion 21 and the inner wall of the counterbore. And the internal expansion block 22 is located at the upper orifice of the counterbore and extends radially outward.
Secondly, a plurality of pressure relief holes 28 are circumferentially distributed on a section of the cylindrical portion 20 in the enlarged hole, and each pressure relief groove 200 is communicated with one pressure relief hole 28 to further enhance the elastic performance of the elastic portion 21.
The groove width of the pressure-reducing groove 200 is smaller than the hole diameter of the pressure-reducing hole 28 to ensure the final elastic performance.
Specifically, the wedge-shaped transmission structure of the present embodiment includes an inner wedge-shaped surface 23 disposed on the inner wall of the elastic portion 21, an outer wedge-shaped surface 30 contacting with the inner wedge-shaped surface 23 is disposed on the outer wall of the inner expanding driving cylinder 3, and when the inner expanding driving cylinder 3 moves toward the positioning fixture 1, the outer wedge-shaped surface 30 presses the inner wedge-shaped surface 23 to force the inner expanding block 22 connected to the elastic portion 21 to move radially outward.
The elastic part 21 has elasticity and deforms outwards under the drive of the wedge shape, and when the drive is lost, the elastic part resets inwards automatically, and the scheme is simple and the use is flexible and convenient.
Preferably, the internal expanding blocks 22 are distributed at intervals with the positioning surface of the positioning jig 1. The axial pressing piece 4 is positioned on one surface of the internal expansion block 22, which is far away from the positioning surface of the positioning jig 1, and the axial pressing piece 4 and the other surface of the internal expansion block 22 are distributed at intervals.
The interval distribution can prevent mutual contact and lead to wearing and tearing, simultaneously, can prevent that the axial from compressing tightly 4 and internal expanding block 22's contact and lead to radial internal stay position to take place extrusion friction and the internal surface finish degree of gouging metal center relatively the metal center to and can ensure final radial axis and the straightness that hangs down of axial axis, ensure the fixed position accuracy of metal center, improve subsequent processingquality quality.
In order to further ensure the perpendicularity of the axial compression piece 4 in compressing the axial lead and the metal middle frame, a guide structure for guiding the axial compression piece 4 to expand and tighten the axial movement of the elastic piece 2 in the radial direction is arranged between the axial compression piece 4 and the positioning jig 1. Specifically, the guide structure comprises a plurality of guide sleeves 40 fixed on the axial compression piece 4, a plurality of guide posts 14 inserted into the guide sleeves 40 one by one are arranged on the positioning jig 1, an avoidance groove body avoiding the guide posts 14 is arranged on the inner expansion block 22, the axial lines of the guide sleeves 40 and the guide posts 14 are distributed along the axial line of the metal middle frame, so that the axial movement of the axial compression piece 4 is smooth due to the mutual matching of the guide sleeves 40 and the guide posts 14, and the final verticality is ensured.
In order to realize driving, as shown in fig. 1-3, one end of the internal expansion driving cylinder 3, which is close to the positioning fixture 1, extends out of the positioning fixture 1, and one end of the internal expansion driving cylinder 3, which extends out of the positioning fixture 1, is connected to an internal expansion driving device 6, which drives the internal expansion driving cylinder 3 to axially move in the radial internal expansion elastic member 2. The internal expansion driving device 6 drives the internal expansion driving cylinder 3 to radially and internally expand the elastic element 2 to move axially. Specifically, the internal expansion driving device 6 comprises a moving frame 60 connected with one end of the internal expansion driving cylinder 3 extending out of the positioning jig 1, an internal expansion driver 61 connected with the moving frame 60 is fixed on the positioning jig 1, and the internal expansion driver 61 drives the internal expansion driving cylinder 3 connected with the moving frame 60 to move axially.
Preferably, the moving frame 60 of the present embodiment is in an inverted U shape, the internal expansion drivers 61 are air cylinders or oil cylinders, two ends of the moving frame 60 of the present embodiment are respectively connected to one internal expansion driver 61, and the two internal expansion drivers 61 act synchronously to drive the moving frame 60 to move vertically under the combined action, so as to achieve the purpose of internal expansion.
The inner expanding actuator 61 is fixed to the bracket 11.
And one end of the pressing driving rod 5, which is close to the positioning jig 1, extends out of the positioning jig 1, and a pressing driver 7 connected with one end of the pressing driving rod 5, which extends out of the positioning jig 1, is fixed on the positioning jig 1. The pressing actuator 7 is an air cylinder or an oil cylinder and is fixed to the bracket 11. The fixing of the pressing driver 7 is performed by a plurality of columns distributed in an array.
The clamping method of the embodiment comprises the following steps:
s1, placing, namely placing the metal frame a on the positioning surface of the positioning jig 1;
s2, radial tensioning is performed, the inner tensioning driving cylinder 3 moves towards the set tensioning direction, the elastic part 21 of the radially inner tensioning elastic part 2 is forced to deform radially outwards and drive the inner tensioning block 22 to displace radially outwards, and finally the inner tensioning block 22 is enabled to contact and tension the inner wall of the metal frame a;
as the tensioning direction is set as shown in the attached drawing 1, the inner-tensioning driving cylinder 3 moves downwards.
And S3, axially locking, wherein the pressing driving rod 5 moves towards the axial locking direction, so that the axial pressing piece 4 is forced to be close to the metal frame a in the step S2 and is pressed at the other axial end of the metal frame a far away from the positioning jig 1.
The axial center of the axial pressing member 4 is provided with a through hole three 43, the upper end of the pressing driving rod 5 penetrates through the through hole three 43, and the upper end of the pressing driving rod 5 is in threaded connection with a detachable member 50, and the cap end of the detachable member 50 presses on the upper hole opening of the through hole three 43. The detachable member 50 is a T-shaped member such as a bolt or a screw.
The third through hole 43 comprises a central hole 430 and a lateral communication avoiding groove 431 which is laterally communicated with the central hole, the inner diameter of the communication position of the lateral communication avoiding groove and the central hole 430 is larger than the aperture of the central hole, when the internal expansion and the tensioning are cancelled, the upper end of the compression driving rod 5 is separated from the central hole and enters the lateral communication avoiding groove under the driving of an external acting force by the axial compression piece 4, and at the moment, the axial compression piece 4 can be detached so as to improve the assembly, disassembly and clamping efficiency.
Example two
The structure and principle of this embodiment are basically the same as those of the first embodiment, and the different structures are as follows: as shown in fig. 5, the axial pressing member 4 includes an outer pressing frame 41, a plurality of avoidance notches are formed in the circumferential outer wall of the outer pressing frame 41, a pressing fitting surface that is fitted with the upper end surface of the metal middle frame a is formed in the lower end surface of the outer pressing frame 41, and the pressing fitting surface is used for fitting with a designated fitting surface of the upper end surface of the metal middle frame. Preferably, the pressing fit surface of this embodiment is an upper conical surface, the upper end surface of the metal middle frame is a lower conical surface, the upper conical surface and the lower conical surface are matched to perform pressing, and meanwhile, the matching of the conical surfaces can automatically correct the axial lead of the metal middle frame, so that the metal middle frame is pressed at a set central position.
Next, an embedded pressing block 42 (a through hole three 43 into which the pressing drive rod 5 extends is formed inside) is provided in the outer pressing frame 41, an outer circumferential surface of the embedded pressing block 42 is closely attached to an inner wall surface of the outer pressing frame 41, and an upper end surface of the embedded pressing block 42 abuts against a lower end surface of the cap end in the first embodiment. An inner convex shoulder is arranged on the lower side of the inner wall of the outer pressing frame 41, and the lower end surface of the embedded pressing block 42 is abutted against the inner convex shoulder to prevent the embedded pressing block 42 from being separated from the outer pressing frame 41 downwards.
By utilizing the split mode, the replacement of the damaged and worn single component can be realized, the replacement efficiency is improved, and the cost is reduced.
EXAMPLE III
The structure and principle of this embodiment are basically the same as those of the first embodiment, and the different structures are as follows: the pressing driver 7 is a linear driving motor.
Example four
The structure and principle of this embodiment are basically the same as those of the first embodiment, and the different structures are as follows: the inner expansion driving device 6 comprises a moving frame 60 connected with one end of the inner expansion driving cylinder 3 extending out of the positioning jig 1, and two linear driving motors which are connected with the moving frame 60 are fixed on the positioning jig 1 and act synchronously.
The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.
Claims (11)
1. Fixture, including positioning jig (1), its characterized in that, fixture still include:
the radially inner tensioning elastic piece (2) is cylindrical and is fixed on the positioning jig (1);
the inner expansion driving cylinder (3) penetrates through the radial inner expansion elastic part (2), a wedge-shaped transmission structure is arranged between the inner expansion driving cylinder (3) and the radial inner expansion elastic part (2), and the inner expansion driving cylinder (3) moves in the expansion direction relative to the radial inner expansion elastic part (2) in the axial direction and forces the radial inner expansion elastic part (2) to expand outwards under the action of the wedge-shaped transmission structure;
the axial pressing piece (4) is matched with the positioning jig (1) so as to axially press the metal frame (a);
the pressing driving rod (5) penetrates through the inner expansion driving cylinder (3), and the axial pressing piece (4) is driven by the pressing driving rod (5) to axially move in the radial inner expansion elastic piece (2); the pressing driving rod (5) drives the axial pressing piece (4) to be close to the metal frame (a) arranged on the positioning jig (1), and the axial pressing piece (4) presses the metal frame (a) on the positioning jig (1).
2. The clamping mechanism according to claim 1, wherein the radially inwardly tensioned elastic member (2) comprises a cylindrical portion (20), one end of the cylindrical portion (20) is fixed to the positioning fixture (1), a plurality of pressure reduction grooves (200) are formed in the circumferential direction of the other end of the cylindrical portion (20), an elastic portion (21) is formed between every two adjacent pressure reduction grooves, each elastic portion (21) is connected with an inwardly expanding block (22), the elastic portion (21) is located in the first through hole (13) of the positioning fixture (1), and a gap is formed between the elastic portion (21) and the first through hole (13).
3. The clamping mechanism according to claim 2, wherein the wedge-shaped transmission structure comprises an inner wedge-shaped surface (23) arranged on the inner wall of the elastic part (21), an outer wedge-shaped surface (30) contacted with the inner wedge-shaped surface (23) is arranged on the outer wall of the inner expansion driving cylinder (3), and when the inner expansion driving cylinder (3) moves to the side of the positioning jig (1), the outer wedge-shaped surface (30) presses the inner wedge-shaped surface (23) so as to force the inner expansion block (22) connected to the elastic part (21) to displace radially outwards.
4. The clamping mechanism according to claim 1, wherein the axial center of the axial pressing member (4) is provided with a through hole three (43), the upper end of the pressing driving rod (5) penetrates through the through hole three (43), and a detachable member (50) is connected to the upper end of the pressing driving rod (5), and the cap end of the detachable member (50) presses on the upper hole of the through hole three (43).
5. The clamping mechanism according to claim 4, wherein the through hole three (43) comprises a central hole (430) and a lateral communication avoiding groove (431) laterally communicated with the central hole, and the inner diameter of the place where the lateral communication avoiding groove is communicated with the central hole (430) is larger than the hole diameter of the central hole.
6. The clamping mechanism according to claim 4, wherein the axial pressing member (4) comprises an outer pressing frame (41), an inner pressing block (42) having the through hole three (43) is arranged in the outer pressing frame (41), and an outer circumferential surface of the inner pressing block (42) is tightly attached to an inner wall surface of the outer pressing frame (41).
7. The clamping mechanism according to claim 1, characterized in that a guide structure for guiding the axial movement of the axial pressing piece (4) radially inwards to tension the elastic piece (2) is arranged between the axial pressing piece (4) and the positioning jig (1).
8. The clamping mechanism according to claim 1, wherein one end of the internal expansion driving cylinder (3) close to the positioning fixture (1) extends out of the positioning fixture (1), and one end of the internal expansion driving cylinder (3) extending out of the positioning fixture (1) is connected with an internal expansion driving device (6) which drives the internal expansion driving cylinder (3) to move axially in the radial internal expansion elastic member (2).
9. The clamping mechanism according to claim 8, characterized in that the internal expansion driving device (6) comprises a moving frame (60) connected with one end of the internal expansion driving cylinder (3) extending out of the positioning fixture (1), an internal expansion driver (61) connected with the moving frame (60) is fixed on the positioning fixture (1), and the internal expansion driver (61) drives the internal expansion driving cylinder (3) connected with the moving frame (60) to move axially.
10. The clamping mechanism according to claim 1, wherein one end of the pressing driving rod (5) near the positioning fixture (1) extends out of the positioning fixture (1), and a pressing driver (7) connected with one end of the pressing driving rod (5) extending out of the positioning fixture (1) is fixed on the positioning fixture (1).
11. Clamping method using a clamping mechanism according to any of claims 1-10, characterized in that the method comprises the steps of:
s1, placing, namely placing the metal frame (a) on the positioning surface of the positioning jig (1);
s2, radially tensioning, wherein the inner tensioning driving cylinder (3) moves towards a set tensioning direction to force the elastic part (21) of the radially inner tensioning elastic part (2) to radially outwardly deform and drive the inner tensioning block (22) to radially outwardly displace, and finally the inner tensioning block (22) is in contact with the inner wall of the metal frame (a) to be tensioned;
and S3, axially locking, wherein the pressing driving rod (5) moves towards the axial locking direction, so that the axial pressing piece (4) is forced to be close to the metal frame (a) in the step S2 and pressed at the other axial end of the metal frame (a) far away from the positioning jig (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111619020 | 2021-12-27 | ||
| CN2021116190203 | 2021-12-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114346937A true CN114346937A (en) | 2022-04-15 |
| CN114346937B CN114346937B (en) | 2024-02-27 |
Family
ID=81091242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210077548.0A Active CN114346937B (en) | 2021-12-27 | 2022-01-24 | Clamping mechanism and clamping method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114346937B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102371375A (en) * | 2011-09-14 | 2012-03-14 | 洛阳德平机械设备有限公司 | Internal expanding tensioning mechanism of pipeline facing machine |
| DE202013104225U1 (en) * | 2013-09-16 | 2013-10-08 | Alfred Härer GmbH | clamping device |
| CN211072624U (en) * | 2019-09-30 | 2020-07-24 | 安川首钢机器人有限公司 | Positioning tensioning device and sleeve positioning equipment |
| CN212330421U (en) * | 2020-04-24 | 2021-01-12 | 台州成春自动化设备有限公司 | Flange tool |
| CN212665610U (en) * | 2020-05-31 | 2021-03-09 | 江苏双环齿轮有限公司 | Clamp for accurately grinding excircle |
| CN113770404A (en) * | 2021-10-11 | 2021-12-10 | 重庆华渝电气集团有限公司 | Lathe internal expanding clamp |
-
2022
- 2022-01-24 CN CN202210077548.0A patent/CN114346937B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102371375A (en) * | 2011-09-14 | 2012-03-14 | 洛阳德平机械设备有限公司 | Internal expanding tensioning mechanism of pipeline facing machine |
| DE202013104225U1 (en) * | 2013-09-16 | 2013-10-08 | Alfred Härer GmbH | clamping device |
| CN211072624U (en) * | 2019-09-30 | 2020-07-24 | 安川首钢机器人有限公司 | Positioning tensioning device and sleeve positioning equipment |
| CN212330421U (en) * | 2020-04-24 | 2021-01-12 | 台州成春自动化设备有限公司 | Flange tool |
| CN212665610U (en) * | 2020-05-31 | 2021-03-09 | 江苏双环齿轮有限公司 | Clamp for accurately grinding excircle |
| CN113770404A (en) * | 2021-10-11 | 2021-12-10 | 重庆华渝电气集团有限公司 | Lathe internal expanding clamp |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114346937B (en) | 2024-02-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108637721B (en) | Clamping device for thin-wall annular shell parts | |
| CN105618656A (en) | Method and device for combined stamping riveting | |
| CN111590334B (en) | Cracking processing equipment for bearing seat of speed reducer housing | |
| CN215615195U (en) | Compressor cylinder end face machining clamp | |
| CN112475345B (en) | Double-tensioning centering fixture | |
| CN216781587U (en) | Clamping mechanism and processing equipment | |
| CN114346937A (en) | Clamping mechanism and clamping method | |
| CN107900968B (en) | Shock absorber cylinder bottom pressure equipment device | |
| CN210255140U (en) | Positioning element of hydraulic structure | |
| CN214023897U (en) | Internal gear fine slotting workpiece rotating tool setting loading and unloading tool | |
| CN212887393U (en) | Press mounting tool for pump transmission shaft | |
| CN211009601U (en) | Bearing axial locking device convenient to assemble | |
| CN112405424A (en) | Tool structure for positioning clamp assembly and assembly method | |
| CN214221669U (en) | Expansion pull-down cylinder | |
| CN219372246U (en) | Assembling tool for motor end cover bearing tight ring | |
| CN214685106U (en) | Novel bearing press-fitting expansion mechanism | |
| CN213730314U (en) | Combined oil seal press-fitting die | |
| CN219234652U (en) | Milling fixture for thin-wall workpiece | |
| CN213105571U (en) | Double-feeding multipoint floating fixture for cylinder sleeve | |
| CN116967739B (en) | High-precision assembly fixture and method for rigid gear and cross bearing of harmonic reducer | |
| CN220903127U (en) | High-precision assembly device for realizing circumferential positioning based on hydraulic control | |
| CN219234453U (en) | Surrounding riveting device | |
| CN220278490U (en) | Quick-change universal end face tooth broaching machine clamp | |
| CN219901103U (en) | Positioning fixture for boring cylinder sleeve | |
| CN114536055B (en) | Special-shaped casting inclined hole drilling clamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |