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- inCAD Library Home
- > No.000221 Simultaneous Clamping Mechanism Using Lever
No.000221 Simultaneous Clamping Mechanism Using Lever
Double-swing clamp driven by a single cylinder.
Relevant category
Knuckle Joints
| Product name | Knuckle Joints - Tapped, Configurable |
|---|---|
| Part number | FNTM8-1.25-D8-B8-U15 |
| Features | Knuckle Joints - Tapped, Configurable - equipped with Rotation Stopper and compatible with M3~M26 screws regardless of Convex Type or Concave Type. |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Economical components effectively used as cylinder link mechanism parts
Available sizes
■Knuckle Joints - Tapped, Configurable
| Convex Shaped | Concave Shaped | Material | Surface Treatment | ||
|---|---|---|---|---|---|
| Standard | Wide Type | Bolt Fixing Type | |||
| ○ | ○ | ○ | ○ | 1045 Carbon Steel | Black Oxide |
| ○ | ○ | ○ | - | Electroless Nickel Plating | |
| ○ | ○ | ○ | - | 304 Stainless Steel | - |
■Sizes and Dimensions
| M-Pitch | Hole Dia. (Selectable) | B 1 mm Increment | Overall Length A | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Convex Type | Concave Type | ||||||||||||||||
| Standard | Wide Type | Bolt Fixing Type | |||||||||||||||
| *3-0.5 | 3 | 4 | 5 | 3～10 | 3～5 | 6～10 | 6～10 | L+6 | |||||||||
| *4-0.7 | |||||||||||||||||
| *5-0.8 | 4 | 5 | 6 | 4～12 | 4～6 | 7～12 | 7～12 | ||||||||||
| *6-1.0 | |||||||||||||||||
| 8-1.0 | 5 | 6 | 8 | 5～16 | 5～8 | 9～16 | L+8 | ||||||||||
| *8-1.25 | 9～16 | ||||||||||||||||
| 10-1.25 | 6 | 8 | 10 | 6～20 | 6～10 | 11～20 | |||||||||||
| *10-1.5 | 11～20 | ||||||||||||||||
| 12-1.25 | 8 | 10 | 12 | 13 | 8～22 | 8～11 | 12～22 | - | L+10 | ||||||||
| 12-1.5 | |||||||||||||||||
| 14-1.5 | 10 | 12 | 13 | 14 | 15 | 16 | 10～25 | 10～13 | 14～25 | L+12 | |||||||
| 16-1.5 | |||||||||||||||||
| 18-1.5 | 12 | 13 | 14 | 15 | 16 | 20 | 12～28 | 12～14 | 15～28 | L+14 | |||||||
| 22-1.5 | 12～32 | 12～16 | - | L+16 | |||||||||||||
| 26-1.5 | 12～38 | 12～18 | L+19 | ||||||||||||||
Only those sizes with * marks are available for Bolt Fixing Concave Type.
Rod End Coupling Rods
| Product name | Rod End Coupling Rods - Both Ends Threaded |
|---|---|
| Part number | LBRFNF8-70-25 |
| Features | Rod End Coupling Rods with the right-hand/left-hand thread selectable in size and length. |
* Orange colored cells in the table below indicate the part numbers used in this example.
Selection criteria
Economical components effective for using as cylinder link mechanism parts
Available sizes
■Rod End Coupling Rods - Both Ends Threaded
| Material | Surface Treatment | Accessory (one hex nut for right / left-hand thread) | |
|---|---|---|---|
| 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) | Overall Length | Thread Length (Under Head) | Wrench Flats |
|---|---|---|---|
| 3 | 19-300 | 5-15 | 6 |
| 4 | 22-400 | 6-20 | 7 |
| 5 | 25-600 | 7-25 | 8 |
| 6 | 32-600 | 9-30 | 10 |
| 8 | 38-1000 | 12-40 | 13 |
| 10 | 44-1000 | 15-50 | 17 |
| 12 | 54-1000 | 18-60 | 19 |
| 14 | 60-1000 | 21-70 | 21 |
| 16 | 66-1000 | 24-80 | 24 |
| 18 | 72-1000 | 27-90 | 27 |
| 20 | 85-1000 | 30-100 | 30 |
| 22 | 91-1000 | 33-110 | 32 |
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-
- * Unit assembly Data consists of some sub-assemblies.
It is configured so that each sub-assembly unit can be used as it is or edited.
Application Overview
Purpose
- Purpose
- Clamping on a pipe for cutting.
- Operation
- As the cylinder pulls the lever, the clamp opens and a pipe can be inserted. As the cylinder pushes the lever, the clamp closes and grips the pipe.
Target workpiece
- Shape: resin pipe
- Size: φ30 x L4000mm
- Weight: 0.2kg
Design Specifications
Operating Conditions or Design Requirements
- Outer dimensions: W420 x D420 x H90mm
- Cylinder stroke: 20mm
Required Performance
- Gripping force: 200N or above
Selection Criteria for Main Components
- An air cylinder is selected based on the required gripping force and lever ratio.
Design Evaluation
Verification of main components
- The cylinder thrust and link mechanism are verified to see whether they have the required clamping force.
- (confirmation of positioning cylinder thrust)
- Conditional value: angle θ = sin⁻¹(12.5mm/125mm) = 5.74°, operating air pressure 0.5MPa, efficiency 0.8
- Cylinder theoretical thrust：118N
- From thrust determined by lever angle F = cylinder thrust x efficiency x cos(cylinder thrust angle), F = 118 x 0.8 x cos 5.74° = 93.9N
- (Confirmation of clamping (gripping) force)
- Conditional value: distance from link rotation center to rod A: La = 50mm, distance from link rotation center to cylinder rod: Ls = 125mm
- Confirmation of clamping (gripping) forceIf we put Fs as force by cylinder, from the balance of moment of link, force of rod A Fa = Fs x (Ls/La), hence,
Fa = 93.9 x (125/50) = 234.75N
The force of rod A in clamping direction F is F = Fa x cosθ, hence,
F = 234.75 x cos5.74° = 233.57N
-> The condition (clamping force ≥ 200 (N)) is satisfied.
Other Design Consideration
- The position of the lever (link) fulcrum should be considered so that the clamp can be opened and closed.
- A mechanism should be equipped to enable center position adjustment of the workpiece.
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