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No.000153 Lifting Mechanism Using Rack and Pinions
123
123
Pneumatic lifting mechanism.
Related Category
Floating Connectors
| Product name | Floating Joints -Extra Short Threaded Stud Mount/Tapped |
|---|---|
| Part number | FJCXS6-1.0 |
| Features | Effective when there is limited distance between cylinder and operated object |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Effective when there is limited distance between the cylinder and the operated object.
Available sizes
■Floating Connectors - Extra Short Threaded Stud Mount
| Body/Cover | Joint | Spring | Washer | |||||
|---|---|---|---|---|---|---|---|---|
| Material | Surface Treatment | Material | Surface Treatment | Hardness | Material | Material | Surface Treatment | Hardness |
| EN 1.1191 Equiv. | Black Oxide | EN 1.1191 Equiv. | Black Oxide | 35 ~ 45 HRC | EN 1.4301 Equivalent-WPB | EN 1.4301 Equiv. | Nitriding Treatment | 600HV ~ |
| EN 1.4301 Equiv. | - | EN 1.4031 Equiv. (EN 1.4125 Equiv.) | - | |||||
■Sizes
| Thread Dia. - Pitch | Tap Depth | Thread Length | Allowable Misalignment | Allowable Angular Misalignment | Body Thickness | Body Hex Size |
|---|---|---|---|---|---|---|
| M5-0.8 | 14.9 | 6 | 0.5 | 4° | 14 | 24 |
| M6-1.0 | ||||||
| M8-1.25 | 17.1 | 8.5 | 15.5 | 27 | ||
| M10-1.25 | 21.9 | 10 | 19.5 | 30 | ||
| M14-1.5 | 23.6 | 11 | 1 | 5° | 22 | 38 |
Oil Free Bushings
| Product name | Multi-Layer Bushings/Straight |
|---|---|
| Part number | MDZB15-15 |
| Features | Has a Thin wall and is compact. |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Suitable for linear motion applications that do not require high accuracy.
Available sizes
■Oil Free Bushings - Multi - Layer LF
| Material |
|---|
| Ethylene Tetrafluoride Resin Layer with Filler Material Sintered Bronze Layer Steel-backed Metal Layer (SPCC: Tin Plating) |
■Sizes and Dimensions
| I.D.(mm) | Length(mm) |
|---|---|
| 3 | 3, (4), 5, (6) |
| 4 | (3), 4, (5), 6, (8) |
| 5 | (3), 4, 5, 6, (8) |
| 6 | (3), (4), 5, 6, 8, (10), (12) |
| 8 | (5), 6, 8, 10, 12, (15) |
| 10 | 6, 8, 10, 12, 15, (20) |
| 12 | 6, 8, 10, 12, 15, (20) |
| 13 | (8), 10, (12), 15, (20) |
| 15 | (8), 10, 12, 15, 20, (25) |
| 16 | 10, (12), 15, 20, (25) |
| 18 | 10, 12, 15, 20, (25), (30) |
| 20 | 10, 12, 15, 20, 25, (30) |
| 22 | 10, 12, 15, 20, (25), (30) |
| 25 | 10, 12, 15, 20, 25, (30), (35) |
| 30 | 12, 15, 20, 25, 30, (35), (40), (50) |
| 35 | 12*, 20, 25, 30, (35), 40, (50) |
| 40 | 12, (15), 20, 25, 30, (35), 40, (50) |
| 50 | 20, (25), 30, (35), 40, (50), (60) |
Length( ) is for Straight Type only
Length * is for Flanged Type only
Selection Steps
■Oil Free Bushings Selection Steps
- Determine Operating Conditions
- Specify the overall dimensions of the slide mechanism, then check required conditions for bushings such as the speed and load.
↓
- Specifying the Bearing Dimensions of Multi-Layer LF Bushings.
- Confirm the PV value and allowable maximum PV value, as well as the need of external lubrication.
↓
- Determining the Bearing Materials of Multi-Layer LF Bushings.
- Confirm the operating temperature and atmospheric temperature near the bearing.
↓
- Determining the Bearing Peripheral Section of Multi-Layer LF Bushings.
- Confirm the materials, roughness and rigidity of housing.
Accuracy Info
■Internal Dia. Tolerance of Oil Free Bushings
| I.D. (mm) | I.D. tolerance (mm) |
|---|---|
| 3 | -0.025 -0.024 |
| 4 | -0.025 -0.037 |
| 5 | |
| 6 | |
| 8 | -0.025 -0.040 |
| 10 | |
| 12 | -0.025 -0.043 |
| 13 | |
| 15 | |
| 16 | |
| 18 | |
| 20 | -0.025 -0.046 |
| 22 | |
| 25 | |
| 30 | |
| 35 | -0.025 -0.050 |
| 40 | |
| 50 |
Performance info.
■Allowable properties of Oil Free Bushings
| Non-lubricated | |
|---|---|
| Maximum Allowable Load | 49.0N/mm² |
| Maximum Allowable Velocity | 0.65m/s |
| Maximum Allowable PV Value | 3.60N/mm²･m/s |
Spur Gears
| Product name | Spur Gears/Pressure Angle 20Deg./Module 1.5 |
|---|---|
| Part number | GEAKB1.5-30-15-B-16N |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Selected to efficiently convert horizontal motion into multiple vertical motions.
Available sizes
■Spur Gears - Pressure Angle 20Deg., Module 1.5
| Material | Surface Treatment | Accessory |
|---|---|---|
| EN 1.1191 Equiv. | - | Set Screw (EN 1.7220 Equiv. Black Oxide) |
| Black Oxide | ||
| Electroless Nickel Plating | ||
| EN 1.4301 Equiv. | - | Set Screw(EN 1.4301 Equiv. ) |
■Sizes and Dimensions
| Type | Module | Number of teeth | Shaft bore DIA. (1 mm Increment) | |
|---|---|---|---|---|
| Round Hole, Round Hole + Tap | Keyway Keyway + Tap | |||
| Round Hole, Round Hole + 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. | |||
|---|---|---|---|---|
| Round Hole, | Round Hole +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 Convert a horizontal force to a vertical force.
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Application Overview
Purpose
- Purpose
- To raise and lower multiple lifters using one air cylinder.
- Operation
- Use several rack and gear sets to move the lifters.
Points for use
- Individual workpieces are raised and lowered at the same time.
Target workpiece
- Shape: Connector
- Size: W150 x D40 x H25mm
Weight: 0.3 (3 x 0.1)Kg
Design Specifications
Operating Conditions or Design Requirements
- Upstroke/Downstroke: 30mm
- External dimensions: W174 x D745 x H229mm
Required Performance
- Load: Workpiece + lifting plate + racks = 12.8N
Selection Criteria for Main Components
- Select a cylinder with a tube inner diameter of Ø20mm to lift the load (12.8N)
Design Evaluation
Verification of main components
- Validate cylinder thrust based on the applied load.
- Cylinder selection.
- Cylinder thrust.
Conditions (values): Mass applied to a gear (W) = 1.3kg, gravitational acceleration (g) =9.8m/s², and friction coefficient of the rack and pinions (μ) = 1. - Load F₁ = μWg = 1 x 1.3 x 9.8 = 12.8N
- Where the operating pressure is 0.5Mpa, cylinder thrust F₂ = 132N
- Cylinder thrust.
Other Design Consideration
- Three sets of rack and pinions can be assembled using common parts.
When installing the gears, their positions should be adjusted to reduce backlash.
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