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- > No.000076 Pallet Centering Mechanism
No.000076 Pallet Centering Mechanism
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4 direction simultaneous clamping with a cylinder and a linkage mechanism.
Relevant category
Rod End Bearings
| Product name | Rod End Bearings - Standard |
|---|---|
| Part number | PHSCM5 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Suitable for applying to swinging link mechanism parts.
Available sizes
■Rod End Coupling Rods - Both Ends Threaded
| Material | Surface Treatment | Accessory (Hex Nut) | |
|---|---|---|---|
| Material | Surface Treatment | ||
| 1045 Carbon Steel | Black Oxide | 1045 Carbon Steel | Trivalent Chromate |
| Electroless Nickel Plating | |||
| 304 Stainless Steel | − | 304 Stainless Steel | − |
■Sizes and Dimensions
| Screw Dia. (Coarse) | Hex Size | Overall Length (1mm Increments) | Thread Length |
|---|---|---|---|
| M3 | 6 | 25〜39 | 8 |
| 40〜300 | 15 | ||
| M4 | 7 | 35〜49 | 12 |
| 50〜400 | 20 | ||
| M5 | 8 | 40〜59 | 13 |
| 60〜600 | 25 | ||
| M6 | 10 | 50〜69 | 17 |
| 70〜600 | 30 | ||
| M8 | 13 | 60〜89 | 23 |
| 90〜1000 | 40 | ||
| M10 | 17 | 70〜109 | 28 |
| 110〜1000 | 50 | ||
| M12 | 19 | 80〜129 | 33 |
| 130〜1000 | 60 | ||
| M14 | 21 | 130〜1000 | 60 |
| M16 | 24 | 170〜1000 | 80 |
| M18 | 27 | 170〜1000 | 80 |
Link
| Product name | Links - Angled, 3 Hole |
|---|---|
| Part number | LKBM6-L50-S50-Q90-H6-HA6-T6 |
| Features | Angled links are available. |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Suitable for limiting 2-axis direction with bearings.
Available sizes
■Links - Angled
| Material | Surface Treatment |
|---|---|
| 1018 Carbon Steel | Black Oxide |
| Electroless Nickel Plating |
■Sizes and Dimensions
| Main Shaft Bore Dia. | Bend Angle | Plate Thickness | Arm 1 | Arm 2 | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 1° Increments | Hole Type | Hole Dia. (Selectable) | Distance between Fulcrum and Main Shaft | Hole Type | Hole Dia. (Selectable) | Distance between Fulcrum and Main Shaft | ||||
| φ4 | 90〜180 | 5 ・ 6 | Precision Hole ・ Tapped Hole | φ3 φ4 φ5 φ6 φ8 φ10 φ12 φ16 | M3 M4 M5 M6 M8 M10 M12 M16 | 40〜100 (1mm Increments) | Precision Hole ・ Tapped Hole | φ3 φ4 φ5 φ6 φ8 φ10 φ12 φ16 | M3 M4 M5 M6 M8 M10 M12 M16 | 30〜100 (1mm Increments) |
| φ5 | ||||||||||
| φ6 | ||||||||||
| φ8 | ||||||||||
| φ10 | ||||||||||
| φ12 | ||||||||||
| φ14 | ||||||||||
| φ15 | ||||||||||
* Please see the product pages for detailed dimensions.
Accuracy Info
■Accuracy of Links
Main Shaft Bore Dia. Tolerance: H7
Precision Hole Dia. Tolerance: H7
Urethane Molded Bearings
| Product name | Silicon Rubber / Urethane Molded Bearings - Flat |
|---|---|
| Part number | UMBB6-28 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Urethane/Rubber will prevent damage to fixture.
Available sizes
■Urethane Molded Bearings - Flat, Shape A
| Tire Section | Bearing Material | |||
|---|---|---|---|---|
| Material | Hardness | Color | Steel | Stainless Steel |
| (52100 Bearing Steel) | (440C Stainless Steel) | |||
| Urethane | Shore A95 | Black | ○ | ○ |
| White | ○ | ○ | ||
| Shore A90 | Black | ○ | ○ | |
| White | ○ | ○ | ||
| Shore A70 | Black | ○ | ○ | |
| White | ○ | ○ | ||
| Shore A50 | Black | ○ | − | |
| White | ○ | − | ||
| Antistatic Urethane | Shore A90 | Gray | ○ | − |
■Sizes and Dimensions
| I.D. | O.D. | Width | Bearing Used |
|---|---|---|---|
| φ3 | φ10 | 3 | W683ZZA |
| φ12 | |||
| φ4 | φ13 | 4 | W684AX50ZZ |
| φ16 | 5 | 624ZZ | |
| φ5 | φ16 | WBC5−13ZZ | |
| φ20 | 625ZZ | ||
| φ6 | φ20 | 696ZZ | |
| φ28 | 6 | 626ZZ | |
| φ8 | φ28 | 7 | 608ZZ |
| φ30 | 608ZZ | ||
| φ10 | φ30 | 8 | 6000ZZ |
| φ40 | 9 | 6200ZZ | |
| φ15 | φ40 | 6002ZZ | |
| φ45 | 11 | 6202ZZ | |
| φ20 | φ45 | 9 | 6904ZZ |
| φ55 | 14 | 6204ZZ | |
| φ25 | φ65 | 15 | 6205ZZ |
Performance info.
■Load Capacity of Urethane Molded Bearing - Flat
| I.D. | O.D. | Allowable Load N | |||
|---|---|---|---|---|---|
| Shore A95 | Shore A90 | Shore A70 | Shore A50 | ||
| φ3 | φ10 | 38 | 28 | 9 | 4 |
| φ12 | 53 | 34 | 10 | 6 | |
| φ4 | φ13 | 66 | 44 | 13 | 7 |
| φ16 | 79 | 59 | 16 | 6 | |
| φ5 | φ16 | 79 | 16 | ||
| φ20 | 102 | 78 | 20 | 9 | |
| φ6 | φ20 | 114 | 23 | 15 | |
| φ28 | 218 | 157 | 44 | 39 | |
| φ8 | φ28 | 208 | 42 | 35 | |
| φ30 | − | 176 | 81 | 65 | |
| φ10 | φ30 | 94 | 51 | ||
| φ40 | − | 274 | 136 | 93 | |
| φ15 | φ40 | 122 | 96 | ||
| φ45 | − | 343 | 109 | 102 | |
| φ20 | φ45 | 130 | 98 | ||
| φ55 | − | 490 | 225 | 176 | |
| φ25 | φ65 | − | 750 | 333 | 250 |
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Application Overview
Purpose
- (Objective) One cylinder clamps in four directions.
- (Operation) Pallets transferred on a roller conveyor are centered at working position.
Points for use
- Production line where the pallets are detected by photomicrosensor and stopped on the conveyor.
- Pallet evacuation mechanism is not needed.
Target workpiece
- Shape: Pallet
Size: W450×D300×H20mm
Weight:5kg
Design Specifications
Operating Conditions or Design Requirements
- Cylinder stroke: 75mm
- Clamp stroke: 5mm
Required Performance
- Conveyor stopping accuracy; ±45/300mm
Selection Criteria for Main Components
- Set the required linkage operation length (75mm) to be at 60 degrees to the center linkage connecting two sliders.
- Select a cylinder size according to friction coefficient and weight of the pallet.
Design Evaluation
Verification of main components
- Compare the process resistance force to the friction between the pallet and the roller conveyor.
- Here, the friction coefficient between the pallet and the roller conveyor to be 0.2.
- Required force for motion: Fp＝5×0.2×9.8＝9.8N of force can slide.
- From cylinder force chart,
Thrust of φ25 cylinder pull thrust when operation pressure 0.5 MPa Fs = 189 N - Process force withstandable: F = Fs - Fp, so F = 198 - 9.8 = 179.2 N
Therefore, the externally applied process force must be set to less than 179 N
Other Design Consideration
- During evacuation, the workpiece needs to stop on the conveyor within the center of four outside rollers.
- Determine the positions of 8 rollers according to pallet external dimensions.
- Determine the stroke based on roller evacuation position.
- Determine clamping force based on pallet weight and process force.
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