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No.000091 Large automated door
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A cylinder powered mechanism used to open a door.
Related Category
Shaft Collar
| Product name | Shaft Collars/With Key Groove/Slit |
|---|---|
| Part number | SCSKS30-15 |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
To allow even clamping of collars around shaft for increase holding power.
Available sizes
■Shaft collar (Slit type)
| Material | Surface treatment |
|---|---|
| EN 1.1191 Equiv. | Black oxide |
| Electroless nickel plating |
■Sizes and Dimensions
| I.D. (mm) | Thickness (mm) |
|---|---|
| 10 | 10 |
| 12 | 10 |
| 15 | 10 |
| 12 | |
| 15 | |
| 20 | 10 |
| 12 | |
| 15 | |
| 25 | 12 |
| 15 | |
| 30 | 15 |
Accuracy Info
■Accuracy of shaft collars
| I.D. (mm) | I.D. tolerance (mm) |
|---|---|
| 10 | +0.05 +0.01 |
| 12 | |
| 15 | |
| 20 | |
| 25 | |
| 30 |
Oil Free Bushings
| Product name | Oil Free Bushings/Copper Alloy/Thrust Type |
|---|---|
| Part number | MPGZ30-25 |
| Features | Embedded lubricant at flange allows the bearing of the radial journal load and thrust load at the same time. |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Suitable for use in locations where both thrust and radial loads apply.
Available sizes
■Oil free bushings (Copper alloy thrust type, Standard type)
■Sizes and Dimensions
| I.D. (mm) | Length (mm) | Material |
|---|---|---|
| 6 | 10, 12 | High strength brass alloy solid lubricant embedded |
| 8 | 10, 12, 15 | |
| 10 | 10, 12, 15, 20 | |
| 12 | 10, 12, 15, 20, 25 | |
| 13 | 12, 15, 20, 25 | |
| 15 | 12, 15, 20, 25 | |
| 16 | 12, 15, 20, 25, 30 | |
| 18 | 14, 20, 25, 30, 35 | |
| 20 | 14, 20, 25, 30, 35, 40 | |
| 25 | 14, 20, 25, 30, 35, 40 | |
| 30 | 20, 25, 30, 35, 40 | |
| 35 | 20, 25, 30, 35, 40 | |
| 40 | 25, 30, 35, 40, 45, 50 | |
| 50 | 30, 35, 40, 45, 50, 55, 60 |
Accuracy Info
■Accuracy of oil free bushing
| I.D. (mm) | I.D. tolerance (mm) |
|---|---|
| 6 | +0.032 +0.020 |
| 8 | +0.040 +0.025 |
| 10 | |
| 12 | +0.050 +0.032 |
| 13 | |
| 15 | |
| 16 | |
| 18 | |
| 20 | +0.061 +0.040 |
| 25 | |
| 30 | |
| 35 | +0.075 +0.050 |
| 40 | |
| 50 |
Performance info.
■Allowable properties of oil free bushing (Reference values)
| Periodical lubrication | No lubrication | |
|---|---|---|
| Max. allowable load | 29N/mm² | |
| Max. allowable speed | 1.00m/s | 0.5m/s |
| Max. allowable PV value | 3.25Nmm² ･ m/s | 1.65Nmm² ･ m/s |
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Application Overview
Purpose
- Automated door with remote operation control center.
Points for use
- Safety countermeasures such as safety fencing and remote door operation will be taken.
- Door open/close confirmation sensor is mounted above the door.
- The double door structure is operated by cylinders mounted on each side. Door swing angle is 90°.
Target workpiece
- Door size to accommodate people and material flow with sufficient clearance.
- External dims.: Up to W1800 x H2400mm can be loaded.
Design Specifications
Operating Conditions or Design Requirements
- A cylinder push/pull operates the door approx. 90° each side.
- External dimensions: W3086 x H2530 x D610mm
Selection Criteria for Main Components
- Cylinder
- Select a size needed to open / close the door.
- Thrust bushings
- Thrust bushings that can support the entire weight of the door.
Design Evaluation
Verification of main components
- Verify that the cylinder has sufficient force to open / close the door.
- Cylinder
- Operating Conditions
F = 900N - door weight
d = 30mm - shaft dia.
µ = 0.5 -friction of coefficient (shaft - oil free bushing)
L = 100mm - shortest distance from shaft to cylinder - Suppose the force to pull the door is P[N],
F x µ x (d / 2) = L x P
900 x 0.5 x 15 = 100 x P
P = 67.5N . . . (1) - Determine cylinder output thrust (Fc)
Fc = η x P x d
η = 0.5, Load factor
P = 0.4MPa - Operating pressure
d - selected tube I.D. cross section
Fc = 0.5 x 0.4MPa x π / 4 x (100² - 30²)mm²
Fc = 1429N > 67.5N (= From (1))
- Operating Conditions
- Thrust bushing
- Surface pressure applied per thrust bushing = (90kg x 9.8 / 4places) / (π / 4 x 50² -π / 4 x 30²) = 0.2N/mm² < 34.5N/mm²
(For surface pressure selected safety factor is 10)
- Surface pressure applied per thrust bushing = (90kg x 9.8 / 4places) / (π / 4 x 50² -π / 4 x 30²) = 0.2N/mm² < 34.5N/mm²
Other Design Consideration
- Positions of fixed side and door side brackets are adjusted with shims for smooth operation.
- Metal washers supported by the thrust bushings have no constraints in axial direction, and the rotational forces are uniformly transmitted to the bushings.
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