CN220850286U - Reducing expansion pin - Google Patents
Reducing expansion pin Download PDFInfo
- Publication number
- CN220850286U CN220850286U CN202322840455.1U CN202322840455U CN220850286U CN 220850286 U CN220850286 U CN 220850286U CN 202322840455 U CN202322840455 U CN 202322840455U CN 220850286 U CN220850286 U CN 220850286U
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- CN
- China
- Prior art keywords
- guide
- clamping jaw
- stroke
- cylinder
- rectangular frame
- Prior art date
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- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 238000000576 coating method Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 3
- 239000002184 metal Substances 0.000 abstract description 9
- 238000009434 installation Methods 0.000 abstract description 7
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 125000006850 spacer group Chemical group 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 241001330002 Bambuseae Species 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 239000011425 bamboo Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Jigs For Machine Tools (AREA)
Abstract
The utility model relates to a reducing expansion pin, which comprises a rectangular frame and a stroke-adjustable cylinder, wherein the stroke-adjustable cylinder is arranged in the rectangular frame, the top end of the rectangular frame is provided with a cylindrical installation cylinder, three guide mechanisms which are arranged according to a circular array are arranged on the installation cylinder, each guide mechanism is provided with a clamping jaw block which moves along the guide mechanism, the centripetal side of each clamping jaw block is provided with a conical first guide surface, a piston rod of the stroke-adjustable cylinder is provided with a support block, the outer side of the upper half part of the support block is a conical second guide surface, the three clamping jaw blocks are arranged according to a circular array by taking the support block as the center, the outer sides of the lower half parts of the three clamping jaw blocks are sleeved with a plurality of rubber bands which are parallel to each other, and the second guide surfaces are attached to the first guide surfaces. The beneficial effects are that: the distance of the three clamping jaws after being opened is changed by adjusting the stroke of the stroke-adjustable cylinder, so that the three clamping jaws are suitable for round holes on automobile sheet metal parts with different apertures, and the equipment cost of the automobile sheet metal parts is reduced.
Description
Technical Field
The utility model relates to the field of positioning expansion pins, in particular to a reducing expansion pin.
Background
In the assembly, welding and inspection processes of the automobile sheet metal part, the positioning expansion pin is often required to position, support and temporarily fix the automobile sheet metal part.
The existing positioning expansion pin can be generally only used for round holes with fixed apertures, and the positioning expansion holes with different specifications are required to be produced for the round holes with different apertures, so that the equipment cost of an automobile sheet metal part processing enterprise is increased.
Disclosure of utility model
The utility model aims to overcome the problems in the prior art and provide a reducing expansion pin.
In order to achieve the technical purpose and the technical effect, the utility model is realized by the following technical scheme:
The utility model provides a reducing expansion pin, includes rectangle frame, stroke adjustable cylinder is installed in the rectangle frame, the installation section of thick bamboo of cylinder is installed on the top of rectangle frame, install three guiding mechanism according to ring shape array arrangement on the installation section of thick bamboo, every install a clamping jaw piece along guiding mechanism removal on the guiding mechanism, the centripetal side of clamping jaw piece is equipped with the first guide surface of conical surface shape, install the spacer block on the piston rod of stroke adjustable cylinder, the upper half outside of spacer block is the second guide surface of conical surface shape, and three clamping jaw piece uses the spacer block to arrange according to annular array as the center, and three clamping jaw piece's lower half outside cover has many rubber bands that are parallel to each other, the second guide surface is laminated with first guide surface.
The clamping jaw blocks are sequentially divided into a sector-annular guide section, a sector-annular support section and a sector-annular clamping section from bottom to top, the outer diameter of the circular ring corresponding to the support section is larger than that of the circular ring corresponding to the clamping section, and the top end of the mounting cylinder is lower than the bottom end of the support section.
Wherein, centrifugal side surface spraying of clamping jaw piece has polytetrafluoroethylene coating.
The guide mechanism comprises a vertical mounting plate and three horizontal guide rods, the three guide rods are respectively perpendicular to the mounting plate, three mounting grooves which are arranged according to a circular array and three groups of limiting holes which are arranged according to the circular array are formed in the outer side of the mounting cylinder, three horizontal guide holes are formed in the clamping jaw blocks, and the centripetal ends of the guide rods penetrate through the limiting holes and then are inserted into the guide holes.
The side wall of the rectangular frame is provided with two bilaterally symmetrical strip-shaped holes, the left side and the right side of the stroke-adjustable cylinder are respectively connected with two check bolts penetrating through the strip-shaped holes in a screwed mode, and the side wall of the rectangular frame is clamped between the head of the check bolt and the stroke-adjustable cylinder.
The gradient of the second guide surface is the same as that of the first guide surface, and the height of the second guide surface is 2-4 times that of the first guide surface.
The beneficial effects of the utility model are as follows: the stroke-adjustable air cylinder is used for stretching and driving the supporting blocks to move upwards, the three clamping jaw blocks are driven to simultaneously expand outwards to clamp the automobile sheet metal parts around the round holes, the stroke-adjustable air cylinder is used for shrinking and driving the supporting blocks to move downwards, and the three clamping jaw blocks are simultaneously gathered towards the center to loosen the automobile sheet metal parts under the action of the restoring force of the rubber band; the distance of the three clamping jaws after being opened is changed by adjusting the stroke of the stroke-adjustable cylinder, so that the three clamping jaws are suitable for round holes on automobile sheet metal parts with different apertures, and the equipment cost of the automobile sheet metal parts is reduced.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:
FIG. 1 is a schematic perspective view of a diameter-variable expansion pin according to the present utility model;
FIG. 2 is a schematic plan view of a diameter-variable expansion pin according to the present utility model;
FIG. 3 is a schematic view of the structure of the mounting cylinder of the present utility model;
FIG. 4 is a schematic view of the guide mechanism of the present utility model;
FIG. 5 is a schematic view of the structure of the jaw block, brace block, rubber band combination of the present utility model;
FIG. 6 is a schematic view of the structure of the jaw block of the present utility model;
FIG. 7 is a schematic view of the structure of the stay block of the present utility model;
The reference numerals in the figures illustrate: rectangular frame 1, stroke adjustable cylinder 2, bar hole 3, lockbolt 4, mounting cylinder 5, mounting groove 5a, spacing hole 5b, guiding mechanism 6, mounting panel 6a, guide bar 6b, clamping jaw piece 7, guiding hole 7a, first guide surface 7b, guide section 7c, support section 7d, clamping section 7e, support piece 8, second guide surface 8a, rubber band 9.
Detailed Description
The utility model will be described in detail below with reference to the drawings in combination with embodiments.
As shown in fig. 1 to 7, a reducing expansion pin comprises a rectangular frame 1 and a stroke-adjustable cylinder 2, wherein the stroke-adjustable cylinder 2 is arranged in the rectangular frame 1, two bilaterally symmetrical strip-shaped holes 3 are arranged on the side wall of the rectangular frame 1, two check bolts 4 penetrating through the strip-shaped holes 3 are respectively screwed on the left side and the right side of the stroke-adjustable cylinder 2, the side wall of the rectangular frame 1 is clamped between the head of the check bolt 4 and the stroke-adjustable cylinder 2, and the strip-shaped holes 3 are arranged to facilitate adjustment of the installation height of the stroke-adjustable cylinder 2.
A cylindrical installation cylinder 5 is arranged at the top end of the rectangular frame 1, three guide mechanisms 6 which are arranged according to a circular array are arranged on the installation cylinder 5, each guide 6 is provided with a jaw block 7 which moves along the guide 6. Specifically, the guiding mechanism 6 includes a vertical mounting plate 6a and three horizontal guiding rods 6b, the three guiding rods 6b are respectively perpendicular to the mounting plate 6a, three mounting grooves 5a arranged according to a circular array and three groups of limiting holes 5b arranged according to a circular array are arranged on the outer side of the mounting cylinder 5, three horizontal guiding holes 7a are formed in the clamping jaw block 7, and the centripetal ends of the guiding rods 6b penetrate through the limiting holes 5b and then are inserted into the guiding holes 7 a.
The centripetal side of the clamping jaw block 7 is provided with a conical first guide surface 7b, a piston rod of the stroke-adjustable cylinder 2 is provided with a support block 8, the outer side of the upper half part of the support block 8 is provided with a conical second guide surface 8a, the gradient of the second guide surface 8a is the same as that of the first guide surface 7b, and the height of the second guide surface 8a is 2-4 times that of the first guide surface 7 b.
The three clamping jaw blocks 7 are distributed in an annular array with the supporting blocks 8 as the center, a plurality of rubber bands 9 which are parallel to each other are sleeved on the outer side of the lower half part of each clamping jaw block 7, and the second guide surface 8a is attached to the first guide surface 7 b.
The clamping jaw block 7 is sequentially divided into a sector-shaped guide section 7c, a sector-shaped support section 7d and a sector-shaped clamping section 7e from bottom to top, wherein the outer diameter of a circular ring corresponding to the support section 7d is larger than that of a circular ring corresponding to the clamping section 7e, so that the support section 7d can support the bottom surface of a workpiece; the top of the mounting cylinder 5 is lower than the bottom of the supporting section 7d, so that the movement of the clamping jaw block 7 by the mounting cylinder 5 is prevented from being blocked.
The centrifugal side surface of the clamping jaw block 7 is sprayed with a polytetrafluoroethylene coating, so that scratches on the workpiece surface caused by the clamping jaw block 7 are avoided, and meanwhile abrasion of the centrifugal side of the clamping jaw block 7 is reduced.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.
Claims (6)
1. The utility model provides a reducing expansion pin which characterized in that: the device comprises a rectangular frame and a stroke-adjustable cylinder, wherein the stroke-adjustable cylinder is arranged in the rectangular frame, a cylindrical mounting cylinder is arranged at the top end of the rectangular frame, three guide mechanisms which are arranged according to a circular array are arranged on the mounting cylinder, each guide mechanism is provided with a clamping jaw block which moves along the guide mechanism, the centripetal side of each clamping jaw block is provided with a conical first guide surface, a supporting block is arranged on a piston rod of the stroke-adjustable cylinder, the outer side of the upper half part of each supporting block is provided with a conical second guide surface, three clamping jaw blocks are arranged according to a circular array by taking the supporting block as the center, and a plurality of rubber bands which are parallel to each other are sleeved on the outer side of the lower half part of each clamping jaw block, and the second guide surfaces are attached to the first guide surfaces.
2. The reducing expansion pin of claim 1, wherein: the clamping jaw blocks are sequentially divided into a sector-annular guide section, a sector-annular support section and a sector-annular clamping section from bottom to top, the outer diameter of the ring corresponding to the support section is larger than that of the ring corresponding to the clamping section, and the top end of the mounting cylinder is lower than the bottom end of the support section.
3. The reducing expansion pin of claim 1, wherein: and polytetrafluoroethylene coatings are sprayed on the centrifugal side surfaces of the clamping jaw blocks.
4. The reducing expansion pin of claim 1, wherein: the guide mechanism comprises a vertical mounting plate and three horizontal guide rods, the three guide rods are respectively perpendicular to the mounting plate, three mounting grooves which are arranged according to a circular array and three groups of limiting holes which are arranged according to the circular array are formed in the outer side of the mounting cylinder, three horizontal guide holes are formed in the clamping jaw blocks, and the centripetal ends of the guide rods penetrate through the limiting holes and then are inserted into the guide holes.
5. The reducing expansion pin of claim 1, wherein: two bilaterally symmetrical strip-shaped holes are formed in the side wall of the rectangular frame, two lockbolts penetrating through the strip-shaped holes are respectively screwed on the left side and the right side of the stroke-adjustable cylinder, and the side wall of the rectangular frame is clamped between the head of the lockbolt and the stroke-adjustable cylinder.
6. The reducing expansion pin of claim 1, wherein: the gradient of the second guide surface is the same as that of the first guide surface, and the height of the second guide surface is 2-4 times that of the first guide surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322840455.1U CN220850286U (en) | 2023-10-23 | 2023-10-23 | Reducing expansion pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322840455.1U CN220850286U (en) | 2023-10-23 | 2023-10-23 | Reducing expansion pin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220850286U true CN220850286U (en) | 2024-04-26 |
Family
ID=90771532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322840455.1U Active CN220850286U (en) | 2023-10-23 | 2023-10-23 | Reducing expansion pin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220850286U (en) |
-
2023
- 2023-10-23 CN CN202322840455.1U patent/CN220850286U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |