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है”ह”ह

IS 10722-1 (1983): Graphical Symbols for Elements ofKinematic Diagrams - Part 1 [PGD 24: Drawings]

_

IS : 10722. ( Part 1) - 1983 JDC 744’4 : 531; 1 : 003.62 IS0 3952/l 1981 -

Indian Standard

GRAPHICAL SYMBOLS FOR ELEMENTS OF KINEMATIC DIAGRAMS, PART 1

( IS0 Title : Kinematic Diagrams - Graphical Symbols - Part 1 )

National Foreword

This In&an Standard ( Part 1 ), which is indentical with IS0 3952/l-1981 Kinematic diagrams - Graphical symbols - Part 1, issued by the International Organization for Standardization (ISO), was adopted by the Indian Standards Institution on recommendation of the Drawings Sectional Committee and approved by the Engineering Division Council.

Wherever the words ‘ International Standard ’ appear, referring to this standard, they should be read as ‘ Indi~an Standard ‘.

Additional Information i

This standard is the national implementation of IS0 3952/l-1981, as such only the English text has been reproduced. If the French and Russian texts are required, reference should be made to the original IS0 publication.

This standard includes a number of parts, each identical with the corresponding part of the Inter- national Standard IS0 3952, as follows: \

Part 1 ( IS0 3952/l )

Part 2 ( IS0 3952/2 )

Part 3 ( lS0 3952/3 (

Ilhtroduction

Motion of links of mechanisms Kinematic pairs Links and connection of their components N-bar linkages and their components

Friction and gear mechanisms Cam mechanisms

Geneva and ratchet mechanisms Couplings and breaks

The purpose of this International Standard is the creation of a system of graphical symbols for kinematic diagrams. The creation of such a System will simplify the preparation of kinematic diagrams and will facilitate the execution and understanding of such diagrams by specialists-of different countries.

Scope and field of application \

The International Standard establishes the graphical symbols for elements of kinematicz&agrams of products in all branches of industry. The symbols established by the International Standard are to be used in diagrams In technical documentation, as well as’iu.teclinical and educational literature.

The International Standard is being published in three parts, as follows:

Part 1

1

2 3

4

Part 2

5

6

Patt 3

7

8

Motion of links -of mechanisms

Kinematic pairs

Links and connections of their components

N.bar linkages and their components

Friction and gear mechanisms

Can mechanisms

Geneva and ratchet mechanisms Couplings and brakes

Adopted 16 August 1984 @ May 1984, IS11 Cr 7

INDIAN STANDARDS INSTITUTION

MANAK BHAVAN, 9 BAHAtiUR SHAH ZAFAR MARG

NEW DELHI 110002

1 Motion of links of mechanisms

N

__.--_-

No. Designatibn Definition Basic symbol Permissible symbol Notes

__.~ _____ ~-

1.1 Trace of motion Trace or part of trace of For straight line motion

some point on link

For rotational motion

1.2

1.3

-__ -_.__ -

Direction of motion Direction of motion shows to which side point moves along trace

I

Instantaneous stop at Instantaneous stop with- I For straight line motion

iritermediate position out changing direction of I

motion

For rotational motion

1.4

1.5

Dwell at intermediate Dwell without changing ’ position direction of motion

1

Dwell at extreme position Dwell followed by chang- ing of direction of motion I

1.6 Partial reverse motion Motion of link generally in one direction but with partial reversal at some point

Straight line

Rotational

1.7 stop End of motion

1.8 Examples

1.8.1 One-sided motion Motion with constant 6 Straight line

direction

0 Rotational

1.8.2 One-sided motion with Straight line instantaneous stop

Rotational

1.8.3 One-sided motion with dwell

Straight line

Rotational -,

1.8.4 One-sided motion with W Straight line

partial reversal

Rotational

1.8.5 Oscillating motion Motion with variable direction

+ * Straight line

Rotational

.-, ,_. - - _. . . ̂ ”

2 Kinematic pairs

No. Designation Definition Basic symbol Permissible symbol Notes

2.1 Pairs with one degree of freedom

2.1.1 Revolute pair : Turning Joint of two links permit- pair ting rotational motion of

one link relative to the

a) for planar mechanisms other A

if&

+I+

b) for spatial mechanisms

-

2.1.2 Prismatic pair

-.

Joint of two links permit- ting rectilinear translation of one link relative to the =lD

other

+7- I

2.1.3 Screw pair; Helical pair Joint of two links permit- ting helical motion ( with constant pitch ) of one link relative to the other A- A

I

-&t- -A--

2.2 Pairs with two degrees of freedom

2.2.1 Cylindrical pair Joint of two links permit- ting cylindrical motion of one link relative to the -a- other

-

_

-

No. ___

2.2.2

-__

2.3

2.3.1

2.3.2

2.4

2.4.1.

2.5

2.5.1

_

_-

-

Designation

______

Spherical pair with pin

Pairs with three deg- rees of freedom

Spherical pair

Planar contact pair

Pairs with four deg- rees of freedom

Ball-and-cylinder pair

Pairs with five degrees of freedom

Ball-and-plane pair

Definition

Joint ‘of two links per. mitting rotations ahoui two intersecting axes

Joint of two links permit. ting spherical motion o! one link relative to tht other

Joint of two links, permit- ting general planar nzotion of one link rela- tive to the other

Joint of two links made up of a ball within j cylinder

Joint of two links made up of a ball and a plane

Basic symbol

_-

- _

-

Permissible symbol

-

Notes

-

3 Links and connections of their cottlponents

No. Designation i

Definition I

Basic symbol Permissible symbol

3.2 Shaft; bar; axle

-I I

I 3.4 Fixed connection of

component to shaft ( bar, axle )

__J 0

It is permitted to close the solidly fitted-in region with the straight line

-+I-+ -+- 3.5 Adjustable connection of

link components

Notes

-p’

0

4 N-bar linkages and their components

_-

NO.

--

1.1

9.2

4.2.1

4.2.2

4.2.3

Designation

Linkages with lower pairs

Single-element link

The link is a part of a revolute pair

a) for planar mechanisms

b) for spatial mechanisms

The frame is a part of a revolute pair

a) for planar mechanisms

b) for spatial mechanisms

The link is a part of a prismatic pair

Definition

Mechanisms with links forming parts of lower pairs

The link is a part of a kinematic pair

Basic symbol Permissible symbol

d / 1

3-i -

-ELI-

0

Notes

By convention, the part of a pair draw-n with thin lines belongs to the ad- joining link

___-~

4.2.4 The link is a part, of a cylindrical pair

P-P

4.2.5 The link is a part of a spherical pair

4.3 Double-element link ( bi- The link forms the con_ hary link ) nection between two

kinematic pairs

4.3.1 The link forms the con- nection between revolute pairs -

4.3.1.1 Coupler The link forms the con- nection betweed kinema-

/ tic pairs joining mciving links only

b) for spatial mechanisms

I

c

.3.2.2 hider

1.3.3

lt3.3.1

4.3.3.:

The link forms the con- section between a revo- ute and a prismatic pair

Zommon case

Slotted link ( slotted lever )

Slider

The link is a part of ; revolute pair fyith thl frame and a part of i prismatic pair with thl moving link

The link is a part of prismatic pair with th frame

--A-

f ,

Angle 8 is arbitrary

No. --

4.4

4.5

-_

_-

Designation

Ternary link

Mu1 ti-element link

-i-

Definition

The lihk forms the con- nection between three kinematic pairs

Basic symbol

4 Permissible symbol Notes

0 0 0

P

I I)-_0

Symbols are similar to those of binary or ternary link