CA1059468A - Vehicle having resiliently mounted counterweight - Google Patents
Vehicle having resiliently mounted counterweightInfo
- Publication number
- CA1059468A CA1059468A CA298,760A CA298760A CA1059468A CA 1059468 A CA1059468 A CA 1059468A CA 298760 A CA298760 A CA 298760A CA 1059468 A CA1059468 A CA 1059468A
- Authority
- CA
- Canada
- Prior art keywords
- counterweight
- frame
- end portion
- hood
- vehicle
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/07554—Counterweights
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D33/00—Superstructures for load-carrying vehicles
- B62D33/06—Drivers' cabs
- B62D33/063—Drivers' cabs movable from one position into at least one other position, e.g. tiltable, pivotable about a vertical axis, displaceable from one side of the vehicle to the other
- B62D33/067—Drivers' cabs movable from one position into at least one other position, e.g. tiltable, pivotable about a vertical axis, displaceable from one side of the vehicle to the other tiltable
- B62D33/07—Drivers' cabs movable from one position into at least one other position, e.g. tiltable, pivotable about a vertical axis, displaceable from one side of the vehicle to the other tiltable characterised by the device for locking the cab in the tilted or in the driving position
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D49/00—Tractors
- B62D49/08—Tractors having means for preventing overturning or tipping
- B62D49/085—Counterweight
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Vehicle Body Suspensions (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
VEHICLE HAVING RESILIENTLY MOUNTED COUNTERWEIGHT
Abstract of the Disclosure A counterweight is positioned adjacent an end portion of a frame and is attached to the frame to permit limited up and down movement thereof relative to the frame.
A resilient supporting device is mounted on the end portion of the frame and is attached to the counterweight with the supporting device being of a construction sufficient for resiliently supporting the counterweight and for cushioning shock loads exerted on the frame in response to inertia force of the counterweight.
Abstract of the Disclosure A counterweight is positioned adjacent an end portion of a frame and is attached to the frame to permit limited up and down movement thereof relative to the frame.
A resilient supporting device is mounted on the end portion of the frame and is attached to the counterweight with the supporting device being of a construction sufficient for resiliently supporting the counterweight and for cushioning shock loads exerted on the frame in response to inertia force of the counterweight.
Description
~oss46s ~;
Background of the Invention Many vehicles, such as fork lift trucks, have counterweights -rigidly attached to an end portion thereof. Fork lift trucks normally do not have springs between the frame and wheels, and one of the problems encountered therewith, particularly when the truck has the so-called cushioned tires thereon, is that the inertia forces of the counterweight causes jolting shock loads to be exerted on the frame when the vehicle is operated on rough surfaces. These shock loads are transmitted directly to the frame and eventually to the operator. It is desirable to reduce the shock loads on the frame. This would in turn decrease wear on the vehicle and reduce operator fatigue caused by the shocks.
Summary of the Invention .
The present invention is directed to overcoming one or more of the problems as set forth above.
According to the present invention, there is provided a vehicle comprising: a frame assembly having an end portion; a counterweight positioned adjacent the end portion of the frame assembly; means for connecting the counterweight to the frame assembly and permitting limited upward ant downward movement thereof relative to the frame assembly; and resilient supporting means connected to the end portion of the frame assembly and attached to the counterweight for resiliently supporting the counterweight and for cushioning shock loads exerted on the frame assembly in response to inertia force of the counterweight, said resilient supporting ` means being independent of said connecting means.
Brief Description of the Drawings , Fig. 1 is a diagrammatic view in partial section of a work vehicle having the apparatus of this invention; and .
~, 7 :'`. . . ' ' ' ' : ' ' . ' . ' . . ' ' .
Fig. 2 is a view taken along line II-II of Fig. 1.
Detailed Description .eferring now to Fig. 1 of the drawing, a vehicle such as a lift truck 10 includes a frame assembly 11 carried by front and rear wheels 12 and 13, respectively. The frame assembly includes a hood 14 having an end portion 16 and a maln frame 17 having an end portion 18 extending rearwardly beyond the rear wheels. The hood 14 is suitably releasably connected to the frame in the usual manner. A counterweight 19 is positioned ad~acent the end portion of the hood. The counterweight can be of any known construction and can have passages partially shown at 21 extending therethrough for air flow to or from a radiator 22.
A means 23 is provided for attaching the counter-weight 19 to the end portion 16 of the hood 14 of the frame assembly 11 to permit limited up and down movement thereof relative to the frame assembly 11. The means includes two palr of vertlcally spaced llnks 24, 26 and 24', 26' each llnk havln~ flrst and second end portlons 27, 28. Each pair Of llnks ~P~ posltioned on a respectlve side of the vehicle with llnk 24 being spaced above the link 26. The first end portions of the llnks are pivotally connected to the end portion 16 of the hood 14 by pivot pins 29. The second end portions of the links are pi~otally connected to the counter-1 25 wel~ht 19 by pivot pins 31. It will be seen from the drawing `~ that the arrangement of 11nks is such that they constitute a parallelogram llnkage assembly.
A resilient supporting means 35 is mounted on the I end portion 18 of the main frame 17 and is attached to the `' 30 counterweight 19. The resilient supporting means is of a i .
., .
construction sufficient for resiliently supporting the counterweight and for cushioning shock loads exerted on the main frame due to the inertia force of the counterweight.
The resilient support means of the present disclosure includes a fluid ~ack 36 having a cylinder 37 pivotally connected to the end portion 18 by a pivot pin 38. A piston 39 is slidably `
disposed within the cylinder and a piston rod 41 has one end attached to the piston in the usual manner with its other end pivotally connected to the counterweight at a pivot 42.
Preferably, a pair of coil springs 43 and 44 are positioned within the cylinder on opposite sides of the piston 39 and resillently resist the retraction or extension of the piston rod relative to the cylinder.
Alternatively, the coil springs 43 and 44 can be deleted and the fluid jack 36 connected to an accumulator for cushloning the retraction of the piston. Also, another form of resilient supporting means may include a coil spring or resilient elastomer positioned between the end portion 18 Or the frame 17 and the counterweight 19 in combination with a shock absorber to dampen the oscillatory movement of the counterweight.
A means is provided for pivotally connecting the counterweight 19 to the rearward end portion 18 of the frame 11 so that the counterweight and hence the hood 14 can be pivoted in unison relative to the frame between a first `3 position at which the hood is seated on the frame as shown, and a second position at which the hood is spaced from the frame.
~he means can be, for example, a laterally extending bore 46 formed in the counterweight, a bore 47 formed in the rearward ~ 30 end portion 18 of the frame and a pin, not shown, insertable i into the bores 46 and 47.
i' :
.
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., - ,, - . :: .. ~` : .: , . .. : : , . `
In the operation of the lift truck, when the rear wheels 13 of the lift truck 10 contact a bump, for example a rock, the immediate reaction is for the wheel and frame 17 to move upward over the bump. ~owever, the counterweight acts against the spring 44 which yields under the inertia force of the counterweight permitting relative movement between the counterweight and the frame. This cushions the shock loads due to the inertia force of the counterweight and will minimize the transmission of shock loads to the frame.
To prepare the truck for moving the hood 14 and counterweight 19 to the second position, the piston rod 41 of ; the fluid ~ack 36 is retracted thereby lowering the counter-wieght 19 relative to the hood. The counterweight will travel in an arcuate pathway about the pins 29 and the bore 46 will eventually be positioned in alignment with the bore 47. The pin is then inserted lnto the bores 46 and 47 forming a pivotal connection between the counterweight and the rearward end portlon 18 of the frame. The means releasably connectlng the hood to the frame are then released. Finally, the piston rod 41 of the fluid ~ack 36 is extended causing the counter- t weight to pivot about the pin in the bores 46 and 47. By virtue o~ the hood being connected to the counterwelght, lt ls also plvoted ln unlson wlth the counterwelght about the pin to the second position. At the second position, the hood is spaced from the frame so that the engine and related components are readlly accesslble.
To return the hood 14 and counterweight 19 to the . flrst position, the above sequence of events ~PC reversed.
Other aspects, ob~ects and advantages of this invention can be obtained from a study of the drawings, the disclosure and the appended claims.
,` ' .
. . , ~ .- :- .. - . :
Background of the Invention Many vehicles, such as fork lift trucks, have counterweights -rigidly attached to an end portion thereof. Fork lift trucks normally do not have springs between the frame and wheels, and one of the problems encountered therewith, particularly when the truck has the so-called cushioned tires thereon, is that the inertia forces of the counterweight causes jolting shock loads to be exerted on the frame when the vehicle is operated on rough surfaces. These shock loads are transmitted directly to the frame and eventually to the operator. It is desirable to reduce the shock loads on the frame. This would in turn decrease wear on the vehicle and reduce operator fatigue caused by the shocks.
Summary of the Invention .
The present invention is directed to overcoming one or more of the problems as set forth above.
According to the present invention, there is provided a vehicle comprising: a frame assembly having an end portion; a counterweight positioned adjacent the end portion of the frame assembly; means for connecting the counterweight to the frame assembly and permitting limited upward ant downward movement thereof relative to the frame assembly; and resilient supporting means connected to the end portion of the frame assembly and attached to the counterweight for resiliently supporting the counterweight and for cushioning shock loads exerted on the frame assembly in response to inertia force of the counterweight, said resilient supporting ` means being independent of said connecting means.
Brief Description of the Drawings , Fig. 1 is a diagrammatic view in partial section of a work vehicle having the apparatus of this invention; and .
~, 7 :'`. . . ' ' ' ' : ' ' . ' . ' . . ' ' .
Fig. 2 is a view taken along line II-II of Fig. 1.
Detailed Description .eferring now to Fig. 1 of the drawing, a vehicle such as a lift truck 10 includes a frame assembly 11 carried by front and rear wheels 12 and 13, respectively. The frame assembly includes a hood 14 having an end portion 16 and a maln frame 17 having an end portion 18 extending rearwardly beyond the rear wheels. The hood 14 is suitably releasably connected to the frame in the usual manner. A counterweight 19 is positioned ad~acent the end portion of the hood. The counterweight can be of any known construction and can have passages partially shown at 21 extending therethrough for air flow to or from a radiator 22.
A means 23 is provided for attaching the counter-weight 19 to the end portion 16 of the hood 14 of the frame assembly 11 to permit limited up and down movement thereof relative to the frame assembly 11. The means includes two palr of vertlcally spaced llnks 24, 26 and 24', 26' each llnk havln~ flrst and second end portlons 27, 28. Each pair Of llnks ~P~ posltioned on a respectlve side of the vehicle with llnk 24 being spaced above the link 26. The first end portions of the llnks are pivotally connected to the end portion 16 of the hood 14 by pivot pins 29. The second end portions of the links are pi~otally connected to the counter-1 25 wel~ht 19 by pivot pins 31. It will be seen from the drawing `~ that the arrangement of 11nks is such that they constitute a parallelogram llnkage assembly.
A resilient supporting means 35 is mounted on the I end portion 18 of the main frame 17 and is attached to the `' 30 counterweight 19. The resilient supporting means is of a i .
., .
construction sufficient for resiliently supporting the counterweight and for cushioning shock loads exerted on the main frame due to the inertia force of the counterweight.
The resilient support means of the present disclosure includes a fluid ~ack 36 having a cylinder 37 pivotally connected to the end portion 18 by a pivot pin 38. A piston 39 is slidably `
disposed within the cylinder and a piston rod 41 has one end attached to the piston in the usual manner with its other end pivotally connected to the counterweight at a pivot 42.
Preferably, a pair of coil springs 43 and 44 are positioned within the cylinder on opposite sides of the piston 39 and resillently resist the retraction or extension of the piston rod relative to the cylinder.
Alternatively, the coil springs 43 and 44 can be deleted and the fluid jack 36 connected to an accumulator for cushloning the retraction of the piston. Also, another form of resilient supporting means may include a coil spring or resilient elastomer positioned between the end portion 18 Or the frame 17 and the counterweight 19 in combination with a shock absorber to dampen the oscillatory movement of the counterweight.
A means is provided for pivotally connecting the counterweight 19 to the rearward end portion 18 of the frame 11 so that the counterweight and hence the hood 14 can be pivoted in unison relative to the frame between a first `3 position at which the hood is seated on the frame as shown, and a second position at which the hood is spaced from the frame.
~he means can be, for example, a laterally extending bore 46 formed in the counterweight, a bore 47 formed in the rearward ~ 30 end portion 18 of the frame and a pin, not shown, insertable i into the bores 46 and 47.
i' :
.
.. - , . , , :......... . , ` ` , . . . .
., - ,, - . :: .. ~` : .: , . .. : : , . `
In the operation of the lift truck, when the rear wheels 13 of the lift truck 10 contact a bump, for example a rock, the immediate reaction is for the wheel and frame 17 to move upward over the bump. ~owever, the counterweight acts against the spring 44 which yields under the inertia force of the counterweight permitting relative movement between the counterweight and the frame. This cushions the shock loads due to the inertia force of the counterweight and will minimize the transmission of shock loads to the frame.
To prepare the truck for moving the hood 14 and counterweight 19 to the second position, the piston rod 41 of ; the fluid ~ack 36 is retracted thereby lowering the counter-wieght 19 relative to the hood. The counterweight will travel in an arcuate pathway about the pins 29 and the bore 46 will eventually be positioned in alignment with the bore 47. The pin is then inserted lnto the bores 46 and 47 forming a pivotal connection between the counterweight and the rearward end portlon 18 of the frame. The means releasably connectlng the hood to the frame are then released. Finally, the piston rod 41 of the fluid ~ack 36 is extended causing the counter- t weight to pivot about the pin in the bores 46 and 47. By virtue o~ the hood being connected to the counterwelght, lt ls also plvoted ln unlson wlth the counterwelght about the pin to the second position. At the second position, the hood is spaced from the frame so that the engine and related components are readlly accesslble.
To return the hood 14 and counterweight 19 to the . flrst position, the above sequence of events ~PC reversed.
Other aspects, ob~ects and advantages of this invention can be obtained from a study of the drawings, the disclosure and the appended claims.
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Claims (7)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A vehicle comprising:
a frame assembly having an end portion;
a counterweight positioned adjacent the end portion of the frame assembly;
means for connecting the counterweight to the frame assembly and permitting limited upward and downward movement thereof relative to the frame assembly; and resilient supporting means connected to the end portion of the frame assembly and attached to the counter-weight for resiliently supporting the counterweight and for cushioning shock loads exerted on the frame assembly in response to inertia force of the counterweight, said resilient supporting means being independent of said connecting means.
a frame assembly having an end portion;
a counterweight positioned adjacent the end portion of the frame assembly;
means for connecting the counterweight to the frame assembly and permitting limited upward and downward movement thereof relative to the frame assembly; and resilient supporting means connected to the end portion of the frame assembly and attached to the counter-weight for resiliently supporting the counterweight and for cushioning shock loads exerted on the frame assembly in response to inertia force of the counterweight, said resilient supporting means being independent of said connecting means.
2. The vehicle of claim 1 wherein said connecting means includes a pair of links each having first and second end portions with one link being spaced above the other link, said first end portions of the links being pivotally connected to the end portion of the frame assembly, and said second end portions being pivotally connected to the counter-weight.
3. The vehicle of claim 1 wherein said resilient supporting means includes biasing means having a cylinder, a piston slidably disposed therein and a piston rod attached to the piston, said cylinder and said piston rod each being attached to a respective one of the end portion and the counterweight, and means for resiliently resisting said upward and downward movement of said counterweight.
4. The vehicle of claim 3 wherein said last means includes first and second springs positioned within the cylinder on opposite sides of the piston.
5. The vehicle of claim 1 wherein said frame assembly includes a frame and a hood, said frame having an end portion and a mid portion, said hood being normally seated on the mid portion of the frame, said counterweight being positioned adjacent the end portion of the hood and being connected to the hood.
6. The vehicle of claim 5 including means for pivotally connecting the counterweight to the frame end portion for pivotal movement of the counterweight and the hood in unison relative to the frame between a first position at which the hood is seated on the frame and a second position at which the hood is spaced from the frame, and a fluid jack having first and second elements movable relative to each other, said first element being pivotally anchored to the frame end portion and said second element being pivotally connected to the counterweight for pivoting the counterweight and hood between the first and second positions.
7. The vehicle of claim 6 wherein said means includes a first bore formed in the counterweight, a second bore formed in the frame end portion and being positioned in alignment with the first bore, and a pin inserted into the first and second bores.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US05/793,212 US4090579A (en) | 1977-05-02 | 1977-05-02 | Industrial truck having a pivotal hood and counterweight assembly |
| US05/793,211 US4093259A (en) | 1977-05-02 | 1977-05-02 | Vehicle having resiliently mounted counterweight |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1059468A true CA1059468A (en) | 1979-07-31 |
Family
ID=27121368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA298,760A Expired CA1059468A (en) | 1977-05-02 | 1978-03-13 | Vehicle having resiliently mounted counterweight |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS53136224A (en) |
| CA (1) | CA1059468A (en) |
| GB (1) | GB1550604A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0218791Y2 (en) * | 1984-10-12 | 1990-05-24 | ||
| JPH0739676B2 (en) * | 1989-03-15 | 1995-05-01 | 東洋運搬機株式会社 | Vehicle with balance device |
| JPH03286038A (en) * | 1990-03-31 | 1991-12-17 | Toyo Umpanki Co Ltd | Dynamic damper of vehicle |
| JPH03286040A (en) * | 1990-03-31 | 1991-12-17 | Toyo Umpanki Co Ltd | Dynamic damper of vehicle |
-
1978
- 1978-03-13 CA CA298,760A patent/CA1059468A/en not_active Expired
- 1978-03-16 GB GB1045178A patent/GB1550604A/en not_active Expired
- 1978-04-19 JP JP4543978A patent/JPS53136224A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| GB1550604A (en) | 1979-08-15 |
| JPS53136224A (en) | 1978-11-28 |
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