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- > No.000157 Lifter Mechanism
No.000157 Lifter Mechanism
16
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Lifting mechanism guided by interlocking gears.
Relevant category
Backing Plates
| Product name | Floating Joint Backing Plates |
|---|---|
| Part number | BPFA10 |
| Features | Cover plates intended to avoid the driven part from being damaged. |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
It combines uses for avoiding the damages to the moving objects.
Available sizes
■Floating Joint Backing Plates
| Material | Hardness | Surface Treatment |
|---|---|---|
| 1045 Carbon Steel | 45－50HRC | Black Oxide |
| 440C Stainless Steel | － |
| Applicable screw DIA. | O.D. |
|---|---|
| 3 | 42 |
| 4 | |
| 5 | 48 |
| 6 | |
| 8 | 51 |
| 10 | 54 |
| 12 | 70 |
| 14 | |
| 16 | 90 |
| 18 | |
| 20 | 106 |
| 22 | |
| 24 | 116 |
| 26 | |
| 30 | 134 |
Oil Free Bushing
| Product name | Oil Free Metal Bushings |
|---|---|
| Part number | SMZ15-30 |
| Features | Optimized for use in high load, low speed applications. |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Suitable for linear motion in oil free environment.
Available sizes
■Oil Free Metal Bushings
| I.D.(mm) | Length(mm) | Material |
|---|---|---|
| 6 | 6、8、10、12 | Cast Iron Class No.35 Special Solid Lubricant |
| 8 | 8、10、12、15 | |
| 10 | 10、12、15、20 | |
| 12 | 10、12、15-25(Increments of 5) | |
| 15 | 15-30(Increments of 5) | |
| 16 | 15-30(Increments of 5) | |
| 20 | 20-40(Increments of 5）、25 | |
| 25 | 25、30-50(Increments of 10） | |
| 30 | 30-60(Increments of 10) |
Accuracy Info
■Accuracy of oil free bushing (Casting)
| I.D. (mm) | I.D. Tolerance (mm) |
|---|---|
| 6 | +0.014 +0.005 |
| 8 | |
| 10 | |
| 12 | +0.017 +0.006 |
| 15 | |
| 16 | |
| 20 | +0.020 +0.007 |
| 25 | |
| 30 |
Performance info.
■Speeds / Loads (Load Info.) of Oil Free Bushings (Casting)
| Regular | Non-lubricated | |
|---|---|---|
| Maximum Allowable Load | 8N/mm² | 5N/mm² |
| 82kgf/cm² | 51kgf/cm² | |
| Maximum Allowable Velocity | 0.25m/s | 0.15m/s |
| 15m/min | 9m/min | |
| Maximum Allowable PV Value | 0.8 N/mm²・m/s | 0.5 N/mm²・m/s |
| 490 kgf/cm²・m/min | 306 kgf/cm²・m/min | |
Gears
| Product name | Spur Gears - Pressure Angle 20Deg., Module 1.5 |
|---|---|
| Part number | GEAKB1.5-30-15-B-15N |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
It enables one to obtain low price and high accuracy gears.
Available sizes
■Spur Gears - Pressure Angle 20Deg., Module 1.5
| Material | Surface Treatment | Accessory |
|---|---|---|
| 1045 Carbon Steel | ― | Set Screw (4137 Alloy Steel Black Oxide) |
| Black Oxide | ||
| Electroless Nickel Plating | ||
| 304 Stainless Steel | ― | Set Screw(304 Stainless Steel) |
■Sizes and Dimensions
| Type | Module | Number of Teeth | Shaft Bore DIA.(1 mm increment） | |
|---|---|---|---|---|
| Round Hole Round Hole + Tap | Keyway Keyway＋Tap | |||
| Straight Bore Straight Bore+Tap Keyway Keyway+Tap | 1.5 | 12 | 6-12 | 8N |
| 13 | 6-13 | |||
| 14 | 6-8 | |||
| 16 | 6-12 | 8N-12N | ||
| 17 | ||||
| 18 | 6-13 | |||
| 19 | 6-15 | |||
| 20 | 6-16 | |||
| 21 | ||||
| 22 | 6-17 | |||
| 23 | 6-18 | 8N-13N | ||
| 24 | 6-20 | 8N-15N | ||
| 25 | ||||
| 26 | 6-22 | 8N-17N | ||
| 27 | 6-23 | 8N-18N | ||
| 28 | ||||
| 29 | 6-24 | 8N-19N | ||
| 30 | ||||
| 34 | 6-28 | 8N-24N | ||
| 35 | ||||
| 36 | ||||
| 38 | 6-31 | 8N-28N | ||
| 40 | 8-31 | 10N-28N | ||
| 42 | ||||
| 44 | ||||
| 45 | ||||
| 46 | ||||
| 48 | 8-35 | 10N-31N | ||
| 50 | ||||
| 52 | ||||
| 54 | 12-35 | 12N-31N | ||
| 55 | ||||
| 56 | ||||
| 58 | ||||
| 60 | 12-38 | 12N-35N | ||
| 62 | ||||
| 64 | ||||
| 65 | ||||
| 66 | ||||
| 68 | ||||
| 70 | 12-45 | 12N-42N | ||
| 72 | ||||
| 75 | ||||
| 84 | ||||
| 85 | ||||
| 90 | ||||
| 95 | ||||
| 100 | ||||
| 120 | 12-49 | 12N-45N | ||
| Gear specifications | Shaft Bore Specs. | |||
|---|---|---|---|---|
| Straight Bore | Straight Bore +Tap | Keyway | Keyway +Tap | |
| Diameter Shape | ○ | ○ | ○ | |
| No hub | ○ | ○ | ||
| With Hub | ○ | ○ | ○ | |
Accuracy Info
■Accuracy of Spur Gear
Gear accuracy: Previous JIS B 1702 4 Class (New JIS B 1702-1 - 8 class equivalent)
Shaft Bore DIA. Tolerance: H7
IDEA NOTE Minimized abrasion on shaft surface.
Abrasions on the guiding shaft surfaces are minimized by using interlocking gears to guide the vertical movements of the shafts.
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Application Overview
Purpose
- Purpose
- To raise and lower workpieces with minimal abrasion on the guiding shaft's surfaces.
- Operation
- A pneumatic cylinder provides the lifting force to raise the workpieces. The vertical movement is guided by two shafts with oil free bushings. Surface abrasion of the shafts is avoided by interconnecting them with a third shaft and a set of gears that interlocks with teeth machined on the two shafts.
Points for use
- This design is suitable for carrying unbalanced loads.
Target workpiece
- Shape: tray, pallet
- Size: W35 x D78 x H36mm
- Weight: 4.3kg
Design Specifications
Operating Conditions or Design Requirements
- Ascending/descending stroke: 30mm
- Outer dimensions: W110 x D350 x H210mm
Required Performance
- Load + lifting unit: 4.3 + 2.2 = 6.5kg
Selection Criteria for Main Components
- To raise and lower a workpiece load of approx. 6.5kg, a cylinder with an inner tube diameter of φ25mm is selected.
Design Evaluation
Verification of main components
- The cylinder thrust is verified based on the workpiece load.
- Selection of cylinder
- Conditional value: workpiece mass W1 = 6.5kg, gravitational acceleration g =9.8m/s²、
cylinder thrust (pulling side) F1 = 189N (operating pressure 0.5MPa) - The load F2 is
F2 = W1 x g, therefore, F2 = 6.5 x 9.8 = 63.7N < F1
⇒There is no problem.
- Conditional value: workpiece mass W1 = 6.5kg, gravitational acceleration g =9.8m/s²、
Other Design Consideration
- Oil free bushings are selected to guide the motion of the shafts and reduce friction.
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