CN211639616U - Assembly jig locating shaft position self-adjusting mechanism - Google Patents
Assembly jig locating shaft position self-adjusting mechanism Download PDFInfo
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- CN211639616U CN211639616U CN201922494161.1U CN201922494161U CN211639616U CN 211639616 U CN211639616 U CN 211639616U CN 201922494161 U CN201922494161 U CN 201922494161U CN 211639616 U CN211639616 U CN 211639616U
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Abstract
The utility model discloses an assembly jig locating shaft position self-interacting mechanism, its characterized in that: the clamp comprises a load seat part and a positioning shaft part, wherein the load seat part comprises a clamp base plate, a main reference column, an auxiliary reference column and a positioning shaft support column; the positioning shaft part comprises a positioning shaft sleeve, a positioning shaft axis, an axis stop block and a ball plunger, wherein the bottom of the positioning shaft sleeve is fixed with a positioning shaft support column through a positioning groove. The utility model discloses an assembly jig location axle position self-interacting mechanism can improve the low unable accurate positioning's of assembly link part hole positioning accuracy problem, has improved the size precision of assembly back product.
Description
Technical Field
The utility model relates to an assembly jig location axle position self-interacting mechanism belongs to the double-layered tool location technical field in the automatic production line.
Background
Some assembly processes in the automatic production process need to utilize the location axle of anchor clamps to wait to adorn the hole on the part after accurate positioning, again with to joining in marriage the part and fasten to guarantee the relative position size of two parts. If the size of waiting to adorn the part is big, the position size precision in hole is not enough, the part hole can't aim at with the anchor clamps axle when anchor clamps are fixed, need reduce the location axle diameter on the anchor clamps, ensure that the part can put into anchor clamps, there is the clearance after the location axle reduces between part hole and the anchor clamps location axle, the part has the momentum on anchor clamps, and the position is uncontrollable, this kind of position deviation can cause the relative position size precision to reduce after the part assembly, the process quality descends, lead to the finished product to scrap.
Disclosure of Invention
The to-be-solved technical problem of the utility model is: how to solve the problem of shaft hole location on the assembly fixture of the part that the present position precision is lower, improve the relative position progress of the part after the assembly, promote product quality.
In order to solve the technical problem, the technical scheme of the utility model provides an assembly jig locating shaft position self-interacting mechanism, its characterized in that: the clamp comprises a load seat part and a positioning shaft part, wherein the load seat part comprises a clamp base plate, a main reference column, an auxiliary reference column and a positioning shaft support column; the positioning shaft part comprises a positioning shaft sleeve, a positioning shaft axis, an axis stop block and a ball plunger, wherein the bottom of the positioning shaft sleeve is fixed with a positioning shaft support column through a positioning groove; the positioning shaft axis is divided into a head part, a middle step and a bottom part, the head part is provided with an axis guide section and an axis positioning section, the surface of the axis positioning section is a spherical arc surface, the middle step is provided with an axis spherical arc step, and the bottom part is provided with an axis spherical arc bottom surface and an axis cylindrical inclined surface.
Preferably, the bottom of the positioning shaft supporting column and the base plate of the clamp are provided with rotation stopping designs, and the head of the positioning shaft supporting column is provided with a positioning groove, so that the position of the positioning shaft can be conveniently adjusted.
Preferably, the ball plunger is movably connected with the axis of the positioning shaft through a threaded hole in the side surface of the shaft sleeve of the positioning shaft.
Preferably, the bottom of the positioning shaft sleeve is provided with a protrusion facilitating position adjustment.
Preferably, the surfaces of the axle center spherical arc step, the axle center spherical arc bottom surface and the axle center cylindrical inclined plane are spherical arc surfaces.
Preferably, the shaft center stop block is connected with the bottom of the shaft center of the positioning shaft.
The working principle of the fixture positioning shaft position self-adjusting mechanism is as follows:
firstly, calibrating an installed assembly fixture, and measuring the position of a positioning section of the axis of a positioning shaft by taking a main reference column as a coordinate axis zero position and a connecting line of the main reference column and an auxiliary reference column as a coordinate axis direction to ensure that the position is consistent with the nominal value of the position of an assembled part hole in a free state. During assembly, a part hole enters the positioning section downwards along the positioning shaft guide section, if the position of a part to be assembled is different from a theoretical value, the hole is eccentric to the positioning section of the axis of the positioning shaft, the axis deviates along with the position of the hole, after the press assembly is completed, the side face of the axis of the positioning shaft is subjected to the force of a plunger, the part is rotated along the spherical center of the step spherical cambered surface, the part is driven by the positioning shaft, the position is changed, and when the force of each shaft on the part reaches a balanced state, a product is static, and the position is not changed any more. Because the axle center position of the positioning shaft is consistent with the nominal value of the position of the part hole in a free state, the force of the axle center of the positioning shaft on the part hole can drive the part hole to approach to the nominal value direction, and the hole position progress is improved when the positioning shaft is fastened with the matching part.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model discloses an assembly jig location axle position self-interacting mechanism can improve the low unable accurate positioning's of assembly link part hole positioning accuracy problem, has improved the size precision of assembly back product.
Drawings
FIG. 1 is an exploded view of a positioning shaft position self-adjusting mechanism of an assembly fixture according to the present invention;
FIG. 2 is an exploded view of a positioning shaft of the positioning shaft self-adjusting mechanism of the present invention;
FIG. 3 is a partial cross-sectional view of a positioning shaft of an assembly fixture positioning shaft self-adjustment mechanism provided by the present invention;
FIG. 4 is a schematic perspective view of the positioning shaft axis of the positioning shaft position self-adjusting mechanism of the assembly fixture according to the present invention;
FIG. 5 is a schematic cross-sectional view of a positioning shaft guide section of an assembly fixture positioning shaft self-adjusting mechanism of the present invention engaged with a part;
FIG. 6 is a schematic cross-sectional view of a positioning shaft positioning section of an assembly fixture positioning shaft self-adjusting mechanism of the present invention engaged with a part;
FIG. 7 is a schematic cross-sectional view of an assembly fixture positioning shaft position self-adjusting mechanism after positioning shaft position self-adjustment;
reference numerals: 1. the fixture comprises a fixture base plate 2, an auxiliary reference column 3, a main reference column 4, a positioning shaft part 5, a positioning shaft support column 6, a positioning shaft axis 7, a positioning shaft sleeve 8, a ball plunger 9, a screw 10, an axis stop block 11, an axis guide section 12, an axis positioning section 13, an axis spherical arc step 14, an axis cylindrical slope 15, an axis spherical arc bottom surface 15
Detailed Description
In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
1-7, an assembly fixture positioning axis self-adjustment mechanism, comprising: anchor clamps base plate 1, assist reference column 2, main reference column 3, location axle part 4, location axle support post 5, anchor clamps base plate 1 on have the constant head tank, with assist reference column 2, main reference column 3, location axle support post 5 with screwed connection, the position is fixed. The main reference column 3, the auxiliary reference column 2 are matched with the reference of the assembled parts, the axis of the main reference column 3 is the original point, and the connecting line of the main reference column 3 and the auxiliary reference column 2 is the coordinate system direction. The positioning shaft part 4 comprises a positioning shaft center 6, a positioning shaft sleeve 7, a ball plunger 8, a screw 9 and a shaft center stop block 10. The head part of the positioning axis is provided with an axis guide section 11 and an axis positioning section 12, the middle part is provided with a spherical arc step 13, and the root part is provided with an axis cylindrical inclined plane 14 and an axis spherical arc bottom surface 15. The lower part of the positioning shaft sleeve 7 is provided with a convex rib, so that the position can be conveniently adjusted, and the positioning shaft sleeve is connected with a screw 9 after being positioned with a positioning groove at the top of the positioning shaft supporting column 7.
The specific use method of the assembly fixture positioning shaft position self-adjusting mechanism comprises the following steps:
and after the assembly fixture is finished, carrying out position calibration, wherein a main reference column 3 is taken as a coordinate axis zero position, and a connecting line of the main reference column 3 and the auxiliary reference column 2 is taken as a coordinate axis direction. And measuring the position of the positioning section 12 of the axis of the positioning shaft to ensure that the position is consistent with the nominal value of the position of the hole of the assembled part in a free state. During assembly, a part hole moves downwards along a positioning shaft guide section 11 as shown in fig. 5, due to the deviation amount of the hole position and the positioning shaft position, a positioning shaft center 6 rotates around the center of a shaft center spherical arc step 13, the gap between a shaft center cylindrical inclined plane 14 and the inner wall of one side of a positioning shaft sleeve 7 is reduced, the gap of the other side is increased, a shaft center spherical arc bottom surface 15 and a shaft center stop block slide relatively, the shaft center spherical arc bottom surface 15 is concentric with the shaft center spherical arc step 13, the radius of a spherical arc surface is the distance from the center of the sphere to the lowest point of the bottom surface, the compression amount of a ball plunger 8 changes during movement, and the shaft center cylindrical inclined plane 14. When a part is placed on the fixture to the bottom as shown in fig. 6, the part hole is matched with the shaft center positioning section 12, the force F1 applied to the part hole can be roughly calculated according to the lever principle, the positioning shaft center 6 is regarded as a lever, the sphere center of the shaft center spherical arc step 13 is regarded as a fulcrum, the distance on one side is the height difference L1 between the sphere center of the shaft center positioning section 12 and the sphere center of the shaft center spherical arc step 13, and the distance on the other side is the height difference L2 between the ball plunger 8 and the sphere center of the shaft center spherical arc step 13.
Force received by part hole F1:
F1*L1≈F2*L2,F1≈F2*L2/L1
the force F2 of the ball plunger 8 against the axial cylindrical ramp 14 can be calculated according to hooke's law. Let the elastic coefficient of the ball plunger be K, the force F2 of the ball plunger 8 on the axial cylindrical inclined plane 14:
F2≈K*L2*Tan(arcsinΔ/L1)
the maximum acceptable offset Δ max is related to the oblique angle α of the axial cylindrical slope 14, and the acceptable offset is: Δ max ═ L1 × Sin α
After the positioning shaft is placed, the position of the part is adjusted by the force of the positioning shaft, and the position of the axis positioning section 12 in a free state is ensured to be consistent with the nominal value of the part in the calibration stage, so that the force of the positioning shaft always points to the direction of the nominal value, the position of a part hole is closer to the nominal value after adjustment, when the force of each positioning shaft to the part reaches a balanced state, the position of the product is static, and the product is waited to be assembled with a matching part, so that the size precision of the assembled product is improved.
The foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the present invention in any way and in any way, and it should be understood that modifications and additions may be made by those skilled in the art without departing from the scope of the present invention. Those skilled in the art can make various changes, modifications and evolutions equivalent to those made by the above-disclosed technical content without departing from the spirit and scope of the present invention, and all such changes, modifications and evolutions are equivalent embodiments of the present invention; meanwhile, any changes, modifications and evolutions of equivalent changes to the above embodiments according to the actual technology of the present invention are also within the scope of the technical solution of the present invention.
Claims (6)
1. The utility model provides an assembly jig locating shaft position self-interacting mechanism which characterized in that: the clamp comprises a load seat part and a positioning shaft (4) part, wherein the load seat part comprises a clamp base plate (1), a main reference column (3), an auxiliary reference column (2) and a positioning shaft support column (5), wherein the clamp base plate (1) is provided with a screw hole and a positioning groove and is fixed with the main reference column (3), the auxiliary reference column (2) and the positioning shaft support column (5); the positioning shaft (4) part comprises a positioning shaft sleeve (7), a positioning shaft axis (6), an axis stop block (10) and a ball plunger (8), wherein the bottom of the positioning shaft sleeve (7) is fixed with a positioning shaft support column (5) through a positioning groove and a screw (9), a step hole is formed in the middle of the positioning shaft sleeve (7), the positioning shaft axis (6) and the axis stop block (10) are arranged in the center of the positioning shaft sleeve, and a plurality of threaded holes capable of mounting the ball plunger (8) are formed in the side surface of the positioning shaft sleeve; the positioning shaft axis (6) is divided into a head part, a middle step and a bottom part, the head part is provided with an axis guiding section (11) and an axis positioning section (12), the surface of the axis positioning section (12) is a spherical arc surface, the middle step is provided with an axis spherical arc step (13), and the bottom part is provided with an axis spherical arc bottom surface (15) and an axis cylindrical inclined plane (14).
2. An assembly jig positioning shaft position self-adjusting mechanism as claimed in claim 1 wherein the bottom of the positioning shaft support post (5) and the jig base plate (1) are provided with a detent design and the head of the positioning shaft support post (5) is provided with a detent to facilitate adjustment of the position of the positioning shaft (4).
3. The self-adjusting mechanism for the position of the positioning shaft of the assembly jig as claimed in claim 1, wherein the ball plunger (8) is movably connected to the shaft center (6) of the positioning shaft through a threaded hole in the side surface of the shaft sleeve (7) of the positioning shaft.
4. An assembly jig positioning shaft position self-adjusting mechanism as defined in claim 1 wherein the bottom of the positioning shaft sleeve (7) is provided with a protrusion for facilitating position adjustment.
5. The assembly fixture positioning shaft self-adjustment mechanism as claimed in claim 1, wherein the surfaces of the axial center spherical arc step (13), the axial center spherical arc bottom surface (15) and the axial center cylindrical inclined surface (14) are spherical arc surfaces.
6. An assembly jig positioning shaft position self-adjusting mechanism as set forth in claim 1 wherein said axial center stop block (10) is attached to the bottom of the positioning shaft axial center (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922494161.1U CN211639616U (en) | 2019-12-31 | 2019-12-31 | Assembly jig locating shaft position self-adjusting mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922494161.1U CN211639616U (en) | 2019-12-31 | 2019-12-31 | Assembly jig locating shaft position self-adjusting mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211639616U true CN211639616U (en) | 2020-10-09 |
Family
ID=72702658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922494161.1U Active CN211639616U (en) | 2019-12-31 | 2019-12-31 | Assembly jig locating shaft position self-adjusting mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211639616U (en) |
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2019
- 2019-12-31 CN CN201922494161.1U patent/CN211639616U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 1250 Huajing Road, Xuhui District, Shanghai 200030 Patentee after: Shanghai Vico Precision Molding Co.,Ltd. Address before: 1250 Huajing Road, Xuhui District, Shanghai 200030 Patentee before: SHANGHAI VICO PRECISION MOULD & PLASTICS Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |