GB2169377A - Violent impact energy absorber - Google Patents

Violent impact energy absorber Download PDF

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Publication number
GB2169377A
GB2169377A GB08500426A GB8500426A GB2169377A GB 2169377 A GB2169377 A GB 2169377A GB 08500426 A GB08500426 A GB 08500426A GB 8500426 A GB8500426 A GB 8500426A GB 2169377 A GB2169377 A GB 2169377A
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GB
United Kingdom
Prior art keywords
chassis
flange
energy absorber
impact energy
cylinder
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08500426A
Other versions
GB8500426D0 (en
GB2169377B (en
Inventor
James Benedict Cheetham
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Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB8500426A priority Critical patent/GB2169377B/en
Publication of GB8500426D0 publication Critical patent/GB8500426D0/en
Publication of GB2169377A publication Critical patent/GB2169377A/en
Application granted granted Critical
Publication of GB2169377B publication Critical patent/GB2169377B/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R19/00—Wheel guards; Radiator guards, e.g. grilles; Obstruction removers; Fittings damping bouncing force in collisions
    • B60R19/02—Bumpers, i.e. impact receiving or absorbing members for protecting vehicles or fending off blows from other vehicles or objects
    • B60R19/24—Arrangements for mounting bumpers on vehicles
    • B60R19/26—Arrangements for mounting bumpers on vehicles comprising yieldable mounting means
    • B60R19/32—Fluid shock absorbers, e.g. with coaxial coil springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/15—Understructures, i.e. chassis frame on which a vehicle body may be mounted having impact absorbing means, e.g. a frame designed to permanently or temporarily change shape or dimension upon impact with another body
    • B62D21/152—Front or rear frames

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

A violent impact energy absorber as fitted to a vehicle subframe or chassis comprises collapsible tubing 6 and hydraulic piston/cylinder units 3 in series. Tubing 6 alone distorts under low velocity collisions and may be replaced, but under high velocity impacts units 3 also contract to take up some of the force. Units 3 can include a throttle 8 and bursting seal 10, and an air lock (15, Fig. 3). <IMAGE>

Description

SPECIFICATION Violent impact energy absorber This invention relates to energy absorbers within the chassis/subframes of any vehicles.
Many vehicle manufacturers have designed chassis/subframes which collapse in part during head on collisions, thus reducing the chance of death or injury to the occupants or the vehicle due to the energy absorbtion in the leading collapsed area of the chassis/sub frame.
This invention which is part of the chassis/subframes and can be used for mountings and other fitments, consists of steel tubing in the forward area e.g. square section with hydraulic cylinders and rams following to the rear.
In minor mishaps or low velocity crashes the cylinders will not operate and the forward damaged steel tubing can be replaced. In higher velocity head on collisions the comparitively weaker tubing collapses in concertina form, forcing the ram forward into the cylinder which is fitted with a low pressure bursting seals covering a small orifice in the rear flange of the hydraulic cylinders.
As the ram advances the pressure exerted on non combustable liquid contained in the cylinders bursts the seal and the liquid goes to atmosphere.
A dome at the top of each hydraulic cylinder contains an air pocket which will tend to reduce the (hydraulic knock) by increasing the air pressure in the dome as the liquid is being discharged.
A specific embodiment of the invention will now be described by way of example with reference to the accompying drawings in which: Figure 1 shows a plan view of units in position assembled to the chassis/subframe of a vehicle.
Figure 2 shows a plan view half section which illustrates the operation of the units.
The forward end 1 is subject to a minor low velocity collision distorting the forward section in the "free area" 7 and may be replaced from the bolted flange (spigoted) 16.
In higher velocity collisions the "free area" 7 yields under the extra force in a concertina pattern forcing the hydraulic rams 5 into the cylinders 3 which contains a suitable liquid 12, as the rams 5 proceed, pressure is built up inside the cylinders compressing an air lock in domes 15 (to reduce the instant "hammer" effect of the liquid), as the pressure continues to increase the low pressure bursting seal 10 fails allowing the liquid to be forced through the apeture/orifice 8 and bored seal retaining plug 9 to the atmosphere, thereby lessening the impact experienced to the occupants of the vehicle Figure 3 shows an elevation half section of one unit showing a push pad 6 the "free area" 7 the hydraulic ram 5 the piston with seals 4 the plastic steady 14.The bolted spigoted flanges 16 the air dome 15 the hydraulic ram seal 11 the low pressure bursting seals 10 the orifice 8 the bored seal retaining plug 9 and the spigoted thrust flange to the chassis/sub frame 13.
1. A violent impact energy absorber comprising a cylinder flanged at each end, jointed and spigoted for location and rigidity, a piston with seals, a piston rod sealed at the forward flange end, mating transision flanges, a forward lead section with push plate, and incombustible liquid.
An air pocket dome is situated uppermost at the rear of the cylinder near the rear flange of the cylinder which mates with a thrust transision flange.
The rear cylinder flange has an orifice in the centre matching an orifice in the thrust transision flange which is provided with a low pressure bursting seal and bored retaining plug.
The unit is adapted to be situated each side and within a chassis/sub frame of any vehicle or any position according to design.
2. A violent impact energy absorber as claimed in 1 wherein dimensions may vary e.g., diameter of cylinder, diameter of orifice and length of stroke depending on the mass of the vehicle.
3. A violent impact energy absorber as claimed in 1 or 2 is provided with a steady as a support for the piston rod housed in the forward lead section.
4. A violent impact energy absorber as claimed in claim 2 or claim 3 wherein means are provided for securing and sealing the unit to a chassis/sub frame.
5. A violent impact energy absorber substantially as described herein with reference to Figs. 1-3 of the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (5)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Violent impact energy absorber This invention relates to energy absorbers within the chassis/subframes of any vehicles. Many vehicle manufacturers have designed chassis/subframes which collapse in part during head on collisions, thus reducing the chance of death or injury to the occupants or the vehicle due to the energy absorbtion in the leading collapsed area of the chassis/sub frame. This invention which is part of the chassis/subframes and can be used for mountings and other fitments, consists of steel tubing in the forward area e.g. square section with hydraulic cylinders and rams following to the rear. In minor mishaps or low velocity crashes the cylinders will not operate and the forward damaged steel tubing can be replaced. In higher velocity head on collisions the comparitively weaker tubing collapses in concertina form, forcing the ram forward into the cylinder which is fitted with a low pressure bursting seals covering a small orifice in the rear flange of the hydraulic cylinders. As the ram advances the pressure exerted on non combustable liquid contained in the cylinders bursts the seal and the liquid goes to atmosphere. A dome at the top of each hydraulic cylinder contains an air pocket which will tend to reduce the (hydraulic knock) by increasing the air pressure in the dome as the liquid is being discharged. A specific embodiment of the invention will now be described by way of example with reference to the accompying drawings in which: Figure 1 shows a plan view of units in position assembled to the chassis/subframe of a vehicle. Figure 2 shows a plan view half section which illustrates the operation of the units. The forward end 1 is subject to a minor low velocity collision distorting the forward section in the "free area" 7 and may be replaced from the bolted flange (spigoted) 16. In higher velocity collisions the "free area" 7 yields under the extra force in a concertina pattern forcing the hydraulic rams 5 into the cylinders 3 which contains a suitable liquid 12, as the rams 5 proceed, pressure is built up inside the cylinders compressing an air lock in domes 15 (to reduce the instant "hammer" effect of the liquid), as the pressure continues to increase the low pressure bursting seal 10 fails allowing the liquid to be forced through the apeture/orifice 8 and bored seal retaining plug 9 to the atmosphere, thereby lessening the impact experienced to the occupants of the vehicle Figure 3 shows an elevation half section of one unit showing a push pad 6 the "free area" 7 the hydraulic ram 5 the piston with seals 4 the plastic steady 14.The bolted spigoted flanges 16 the air dome 15 the hydraulic ram seal 11 the low pressure bursting seals 10 the orifice 8 the bored seal retaining plug 9 and the spigoted thrust flange to the chassis/sub frame 13. CLAIMS
1. A violent impact energy absorber comprising a cylinder flanged at each end, jointed and spigoted for location and rigidity, a piston with seals, a piston rod sealed at the forward flange end, mating transision flanges, a forward lead section with push plate, and incombustible liquid.
An air pocket dome is situated uppermost at the rear of the cylinder near the rear flange of the cylinder which mates with a thrust transision flange.
The rear cylinder flange has an orifice in the centre matching an orifice in the thrust transision flange which is provided with a low pressure bursting seal and bored retaining plug.
The unit is adapted to be situated each side and within a chassis/sub frame of any vehicle or any position according to design.
2. A violent impact energy absorber as claimed in 1 wherein dimensions may vary e.g., diameter of cylinder, diameter of orifice and length of stroke depending on the mass of the vehicle.
3. A violent impact energy absorber as claimed in 1 or 2 is provided with a steady as a support for the piston rod housed in the forward lead section.
4. A violent impact energy absorber as claimed in claim 2 or claim 3 wherein means are provided for securing and sealing the unit to a chassis/sub frame.
5. A violent impact energy absorber substantially as described herein with reference to Figs. 1-3 of the accompanying drawings.
GB8500426A 1985-01-08 1985-01-08 Violent impact energy absorber Expired GB2169377B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8500426A GB2169377B (en) 1985-01-08 1985-01-08 Violent impact energy absorber

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8500426A GB2169377B (en) 1985-01-08 1985-01-08 Violent impact energy absorber

Publications (3)

Publication Number Publication Date
GB8500426D0 GB8500426D0 (en) 1985-02-13
GB2169377A true GB2169377A (en) 1986-07-09
GB2169377B GB2169377B (en) 1989-09-20

Family

ID=10572551

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8500426A Expired GB2169377B (en) 1985-01-08 1985-01-08 Violent impact energy absorber

Country Status (1)

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GB (1) GB2169377B (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GR890100559A (en) * 1989-09-08 1992-01-20 Georgios Pastiadis Method and system for reducing the collision risks
WO1992017349A1 (en) * 1991-03-28 1992-10-15 Bothwell P W Vehicle and body
FR2691123A1 (en) * 1992-05-12 1993-11-19 Amonles Coovi Fortune Collision protection system for all vehicle types - includes rigid bumper system built within vehicle, with semi-elastic components absorbing shocks
DE4440425A1 (en) * 1994-11-07 1996-05-09 Goerlitz Waggonbau Gmbh Rail vehicle subframe with crash deformable coupling support
DE4440426A1 (en) * 1994-11-07 1996-05-09 Goerlitz Waggonbau Gmbh Rail vehicle subframe with longitudinal and transverse beams
AU679158B1 (en) * 1996-02-09 1997-06-19 Morton International, Inc. Stiffening system for structural member of motor vehicle frame
WO1997039937A1 (en) * 1996-04-22 1997-10-30 Giok Djien Go Floor assembly of a vehicle with means for increasing passenger safety
ES2207996A1 (en) * 2000-10-11 2004-06-01 Anastasio Nieves Haro Reinforced chassis for vehicle, automobile e.g. car has groundbreaking piece that is pushed by piston when impact is applied, and springs which absorb impact, which then pushes and displacesbumper forward
DE10259983A1 (en) * 2002-12-20 2004-07-15 Volkswagen Ag Energy absorption arrangement for motor vehicle front or rear body regions, has accommodation chamber for liquid and/or gaseous energy absorption medium at front and/or rear body region
CN106627452A (en) * 2016-12-20 2017-05-10 山东国金汽车工程技术有限公司 Anti-collision rear bumper left and right mounting bracket

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114275046B (en) * 2021-12-29 2022-11-22 安徽江淮汽车集团股份有限公司 Vehicle collision energy-absorbing device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1226385A (en) * 1967-05-22 1971-03-24
US3860258A (en) * 1972-10-05 1975-01-14 Ford Motor Co Bumper support and energy absorbing frame system for a motor vehicle
GB1384651A (en) * 1971-11-16 1975-02-19 Nissan Motor Vehicles
US3922002A (en) * 1972-11-24 1975-11-25 Gen Motors Corp Occupant restraint system
GB2036922A (en) * 1977-12-21 1980-07-02 Orima H Shock absorber
US4257581A (en) * 1979-07-25 1981-03-24 Keeler Corporation Impact absorbing strut

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1226385A (en) * 1967-05-22 1971-03-24
GB1384651A (en) * 1971-11-16 1975-02-19 Nissan Motor Vehicles
US3860258A (en) * 1972-10-05 1975-01-14 Ford Motor Co Bumper support and energy absorbing frame system for a motor vehicle
US3922002A (en) * 1972-11-24 1975-11-25 Gen Motors Corp Occupant restraint system
GB2036922A (en) * 1977-12-21 1980-07-02 Orima H Shock absorber
US4257581A (en) * 1979-07-25 1981-03-24 Keeler Corporation Impact absorbing strut

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GR890100559A (en) * 1989-09-08 1992-01-20 Georgios Pastiadis Method and system for reducing the collision risks
WO1992017349A1 (en) * 1991-03-28 1992-10-15 Bothwell P W Vehicle and body
FR2691123A1 (en) * 1992-05-12 1993-11-19 Amonles Coovi Fortune Collision protection system for all vehicle types - includes rigid bumper system built within vehicle, with semi-elastic components absorbing shocks
DE4440425A1 (en) * 1994-11-07 1996-05-09 Goerlitz Waggonbau Gmbh Rail vehicle subframe with crash deformable coupling support
DE4440426A1 (en) * 1994-11-07 1996-05-09 Goerlitz Waggonbau Gmbh Rail vehicle subframe with longitudinal and transverse beams
AU679158B1 (en) * 1996-02-09 1997-06-19 Morton International, Inc. Stiffening system for structural member of motor vehicle frame
WO1997039937A1 (en) * 1996-04-22 1997-10-30 Giok Djien Go Floor assembly of a vehicle with means for increasing passenger safety
ES2207996A1 (en) * 2000-10-11 2004-06-01 Anastasio Nieves Haro Reinforced chassis for vehicle, automobile e.g. car has groundbreaking piece that is pushed by piston when impact is applied, and springs which absorb impact, which then pushes and displacesbumper forward
DE10259983A1 (en) * 2002-12-20 2004-07-15 Volkswagen Ag Energy absorption arrangement for motor vehicle front or rear body regions, has accommodation chamber for liquid and/or gaseous energy absorption medium at front and/or rear body region
CN106627452A (en) * 2016-12-20 2017-05-10 山东国金汽车工程技术有限公司 Anti-collision rear bumper left and right mounting bracket
CN106627452B (en) * 2016-12-20 2019-06-07 山东国金汽车制造有限公司 A kind of rear bumper of anticollision or so mounting bracket

Also Published As

Publication number Publication date
GB8500426D0 (en) 1985-02-13
GB2169377B (en) 1989-09-20

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 20050107