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- > No.000221 Simultaneous Clamping Mechanism Using Lever
No.000221 Simultaneous Clamping Mechanism Using Lever
12
12
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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CAD Download (Unit Assembly)
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Assembly data shows the assembly drawings in the concept design phase. The sole purpose of the data is to explain the structure and functionality of the assembly and is not considered nor to be used as a final design.
You will need to edit the Data so that it meets your specific design conditions. -
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. - The Data for fabricated parts is based on easy-to-edit dimensions and shapes in sketches and histories.
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* The part in the frame is a sub-assembly unit.
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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.
Explore Similar Application Examples
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