Folding Trailer Assignment 2

8/10/2019 Folding Trailer Assignment 2

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YASHAR KHATIB SHAHIDI

Computer Aided Product Design

Year 2 (2006-2007) Level 2

CAD & Development 2 (ET2003)

Module Tutor: Dr A J Felton

Assignment: Folding Trailer


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1. Existing towed trailers design:

1.1 Motorcycle folding trailer:

It transports Harley, Gold Wing, street or dirt bike, or sport cycle anywhere.

Then it can be folded up to store anywhere. This trailer is strong enough to

haul the big bikes.

1.1.1 Motorcycle trailer1

1.1.2 Rear view 2

1.1.2 Side view 3

1.1.1 Design specifications of Motorcycle trailer 4 :

holds 1 bike

One person can safely load a motorcycle and secure the tie-downs

8 wheel Rim


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6 tire width

Maximum of 35 lbs minimum of 25 lbs for lighter bike

Trailer will NOT bounce, the tires act almost like a pneumatic tire

Capacity: 1 bike

Color: Black

Weight: 175 lbs

1.2 Folding trailer:

It is used to carry house or other heavy stuff and can be towed by any vehicle.

This kind of trailers has pre-drilled holes on the top of the frame rails to attach

flooring material. It is easy to be assembled. In most cases; assembly can be

completed in approximately 2 hours. Once assembled, it can be simply folded

up for easy storage in a compact area of any garage, barn or shed.

1.2.1 SJ-8510 Folding trailer5

1.2.2 Folding trailer Parts to be assembled

6


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1.2.1 Design specifications of folding trailer7 :

Weight of Trailer: 215 lbs

Max Load Capacity: 965 lbs

2" x 2" x 2.5mm C-Channel Frame Structure

2" x 2" Square Tube Tongue

4-Bolt Easy Lube Hubs

4.8-8 (B) Tubeless Tires

It accepts stake sides

Bed Structure: 4' x 8'

D.O.T./C.S.A. Compliant Stop, Turn, Tail & Running Light Assemblies

Axle: 1.5" C-Channel Steel

1.3 Easy store trailer:

In less than 60 seconds, and without the use of any tools, converts to an

easily storable box on castors that can be wheeled through any doorway or

side passage for safe and convenient storage.

With the box removed it can also be used as a flat bed trailer for carrying

awkward loads.


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1.3.1 Trailer in box8

1.3.2 Removed from box 9

1.3.3 Towed by car10


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1.3.1 Design specifications of Easy Store trailer11 :

Overall height on end: 2030mm

Overall width for opening 532mm

Box size: 1270mm long x 1120mm width x 500mm deep

Flat bed mode: 1230mm long x 1070mm wide

It weighs 100kg with a 400kg payload making a max gross weight of

500kg

It is unbraked with 8" wheels

It has a drop tail gate

1.4 Snowmobile Trailers and Mounting Brackets:

It hauls the snowmobiles safely and conveniently. They are easy to assemble

with use of some set of simple tools.

1.4.1 LTB 2 Tilt-Bed Utility Trailer12

1.4.1 Design specifications of Snowmobile trailer13 :

Frame is constructed of 14 gauge 2 x 3" rectangular structural steel

tubing

It is coated with black powder

Dimensions: 100 x 144


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Tires: 18.5 x 8.5 x 8C

Two 4 x 8 sheets of 3/4" plywood

1.5 Fishing boat trailers

They are designed to carry boats, fishing boats and sports and leisure Craft

and easy to assemble with simple tools. The frame is made of square tubular

steel with powder coat finish. It can carry boats up to 14 ft.

1.5.1 Fishing boat trailer14

1.5.1 Design specifications of Economy Fishing Boat Trailer15 :

Strong steel construction

They all dipped in hot galvanized


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Supporting rollers fully adjustable for balance and hull support

Lighting set includes demountable and adjustable arms

Suspension and braking system

1.6 Dump Trailer:

It is designed to empty or dump rubbish or other materials without use of

physical strength.

1.6.1 5'x8' Dump Trailer16

1.6.1 Design specifications of Dump Trailer17 :

2" x 3" Tubing Main Frame

Tongue construction: 2x3 Tubing

G.V.W: 2990lb

Side Rails: 20

Dimension of main frame: 5' x 8'


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1.7 Tilt bed Trailers:

It is designed to carry heavy duty vehicles.

1.7.1 Tilt bed trailer18

1.7.1 Design specifications of Tilt bed trailer19 :

Dimensions: 70" or 80" width, Length 12'

11 degree tilt angle

72"-82" Wide between Fenders

Tilt Deck in Back from 12' - 16'

1.8 Heavy duty equipment trailers:

The heavy duty equipment trailers are designed and constructed using a

channel iron mainframe and tubing cross-members, and axles that can bear

the load. A front, manual jack system operates the tilting deck providing


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simple and trouble free use. A removable top offers increased stability when

lowering or raising the trailer.

1.8.1 Heavy duty equipment trailer 20

1.8.1 Design specifications of Heavy duty equipment trailer21

:

14, 16, 18 & 20 ft. Lengths

80" wide deck

Stake pocket tie downs

Primed & painted with acrylic enamel

7.50 x 16" E range tires

1- 7,000 lb. jack

Surge brakes

1.9 Reel Trailers and Poles:

It is suitable for transporting cable, wire, etc. There are some options

available.

They are designed to extremely heavy duty from a single axle with one reel

bar to four large spools with sauber brake system.


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1.9.1 Flatdeck trailer with 4 spool holders

1.9.2 Lighter duty custom built pole trailer

1.9.3 6'x10' Utility Tilt bed with removable reel stand 3,500# or 6,000#

GVWR available


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1.9.1 Extendable hitch pole trailer :

Extendable up to 42

Movable stantions

Heavy duty tie down straps

Fenders

Stationary hitches

Deck areas

LED lights

1.9.4 Extendable hitch pole trailer


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1.10 Livestock Trailers (Specifications) :

6' 6" Inside Height

80" wide with Torsion Axles

2 x 8 Treated Wood Floor (lengthwise)

16" on C. Cross Members

Center Divide Gate

Front Air Vents

48" High Solid Side, 14 Ga.

Escape Side Door

Right Hand Swing Rear Gate with 1/2 Slide Door

Slam Latch on Back Door

Gravel Guard

24" on Center Side Tube Supports

6,000- 7,000 lb. Torsion Axles Elec

1.10.1 Livestock traile
http://www.dktrailers.com/trailers/Livestock%20,%20Horse%20Trailers/large_photos/livestock_gate.jpghttp://www.dktrailers.com/trailers/Livestock%20,%20Horse%20Trailers/large_photos/livestock_gate.jpg


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2. Sketches and concept of designs for a new

folding trailer:

2.1 Introduction:

The new folding trailer which has been designed is branded as Ex2000-trailer

(Figure 2.1).

It is simply designed and strength enough to carry loads ranging from light

load up to maximum 500Kgloads. Dimensions of the bed size are 100cm x

240cm. (Figure (2.2)

The folding trailer frame is constructed of 2" W x 3" H galvanized steel - C

Channel shape with black powder coat finishes which protect the frame and

prevent it from getting rusted (Figure 2.3).

The main frame is supported with 6 members cross which make the frame

stable and strong enough to stand the maximum load.

One sheet of up to 1.9cmthickness plywood is cut into two 100cm x 120cm

squares for the deck which is required to cover the bed of the folding trailer

frame.


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2.2 Folding mechanism (storage instructions):

The main bed consists of two equal beds which are connected together

through rotation plate.

Step1:

The frame retention carriage bolts is unscrewed from each side of the trailer.

Now the rear bed is ready to fold over the front bed (Figure 2.4).

Step 2:

The back bed is folded all the way over the front bed and secured by using

frame retention carriage bolt unscrewed in step 1 (Figure 2.4).

Step 3:

The trailer is carefully tilted up.

Step 4:

The tow bar in front is folded back and can be secured by a piece of wire

(Figure 2.5).

Step 5:

The folding trailer is tilted up completely into the storage position (Figure 5).

Caution:


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It is advisable to break the trailer down to as close to the storage area as

possible, because it reduces the possibility of damage to the assembly.

3. Bill of materials:

The main parts of the folding trailer are shown in picture 3.1.

All the parts have been drawn in 2D and 3D according to BS8888.

Part No. Part Description Quantity

1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B1265 B


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LB Load Bo

(b

Bracket 1

Bracket 2

Bolt 50

Bolt 16

Bolt 9

Bolt 22

LB Load Bo

(b

Bracket 1

Bracket 2

Bolt 50

Bolt 16

Bolt 9

Bolt 22

Support Brack

Bracket 2


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1265 B M12 x 65 Bolt 4

8 H-N M8

Hex nut

M8 Hex nut

50 10 H-N M10 Hex

nut

10 H-N

12 H-N M12 Hex nut 26

3.1 Standard parts:

3.1.1 Trailer suspension units: 350Kgextended stub


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Independent un-braked suspension unit with profiled solid steel arm, 1 dia.

Capacity:350 Kg per pair.

Rubber Suspension Units are simple yet efficient assemblies based on high-

density rubber inserts, which progressively compress as loading and tension

increases. Being independent, suspension units permit unrivalled flexibility in

trailer design .

3.1.2 Mounting Beam:

1000mm wide, 50mm x 25mm steel box section complete with 350kg pre-

welded mounting plates. Mounting plate dimensions are 105x178mm with four

10mm holes. Finished in black primer .

3.1.3 Rim and wheel:

8" - 4 stud, silver powder coated, pressed steel wheel rim, for light-duty

trailers. Capacity:350Kg

3.1.4 Hub:

4. Mass properties:


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Mass properties of main parts have been calculated through SolidWworks

and printed out as a final result in following papers:

Part Name Mass(grams) Volume(mm ) Surface

Area(mm )

Mass(grams)

Hub

Bench Bracket

Mounting Beam

Bracket

5. Design and assembly process:

Tools required: PliersChannel lock pliers Screwdriver Electric

Drillhammer.


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In assembling trailer parts are in order by standing at rear of trailer and

looking toward tongue.

In assembling the nuts and bolts shouldnt be completely tightened until

the entire is assembled. Installing 2 cm Plywood base is the last step.

Construction (strength):

It is a big factor in strength. If the trailer is bolted together, the joints will

act quite differently than if it is welded. Weldingand other construction

techniques are thought can give strength and care in the trailer design.

Step1:

In this design all the front right side rail (FRR), front left side rail (FLR)

and cross member (CM) are welded together which results in Front

Bench(Figure 5.1).

Rear right side rail (RRR), rear left side rail (RLR) and cross member

(CM) are welded together which results in Rear Bench(Figure 5.1).

Step 2:

Right tow bar connecting rail (RTCR) and left tow bar connecting rail (LTCR)

and cross member are welded together which results in Tow Bar(Figure 5.1).


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Step 3:

Rotation plates (RP), left rotation plate (LRP) and right rotation plate (RRP)

are welded to both sides of rear and front bench (Figure 5.1).

Step 4:

The tow bar connecting (TB) is attached to the front right and left rail by four

M10x65 bolt and M10 Hex nut (Figure 5.1).

Step 5:

8 Stake clamps (SC) are attached to rails two on four sides by M10x30 bolt

and M10 Hex nut (Figure 5.1)

Step 6:

T-plate (TP) is attached to tow bar in front by 4 M10x65 bolt and M10 Hex nut

(Figure 5.2).

Step 7:

Bench support bracket (RSB) is attached to whole bench by 10 M10x30 bolt

and 10 M10 Hex nut (Figure 5.2)

Step 8:

The 50mm x 25mm mounting beam (MB) is welded to underneath of Bench

support bracket (Figure 5.3).


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Step 9:

The suspension units (SU) are attached to mounting beam by 12 M10x30 bolt

and Hex nut (Figure 5.3)

Step 10:

The 4-stud Hub (H) with grease nipple is attached to Suspension units with

castle nut which included in suspension unit (Figure 5.4).

Step 11:

The 8 stud, silver powder coated, pressed steel wheel Rim/Tire (T/R-A) is

attached to Hub by 4 M12 Hex nut (Figure 5.4).

Step 12:

Mudguard brackets (MB) are attached to rear bench by 2 M8x20 and Hex nut

(Figure 5.4).

Step 13:

Mudguards (M) are attached to brackets by two M8x20 and Hex nut (Figure

5.1).

Step 14:

Tail light brackets (TLB) are attached to back of rear bench by M10x30 bolt

and M10 Hex nut (Figure 5.1).


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Step 15:

Tail lights (LTL & RTL) are attached to brackets at the end of the rear in both

sides.

Step 16:

Side flashing lights (SFL) are attached to front bench at both sides (Figure

5.1).

Step 17:

Finally the 1.9cm Bench Covers (BC) which are made of Plywood are

attached on top of each bench by 16 M10x30 bolt and Hex nut (Figure 5.1).

Step 18:

The Load Box (LB) which keeps loads is attached to 8 clamp stakes which

have already been attached to benches (Figure 5.5).

Step 19:The trailer coupling (TC) is attached to T-plate in front of Tow Bar by

two M12 x 65 and Hex nut.

Step 20:

The final product appears as shown in figure 5.5.


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Folding Trailer Assignment 2

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