CN87210275U - Braking device for trailer of walking tractor - Google Patents
Braking device for trailer of walking tractor Download PDFInfo
- Publication number
- CN87210275U CN87210275U CN 87210275 CN87210275U CN87210275U CN 87210275 U CN87210275 U CN 87210275U CN 87210275 CN87210275 CN 87210275 CN 87210275 U CN87210275 U CN 87210275U CN 87210275 U CN87210275 U CN 87210275U
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- CN
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- Prior art keywords
- brake
- trailer
- braking
- push rod
- cam
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Abstract
The utility model relates to a braking device for a trailer of a walking tractor, which is composed of a foot pedal hydraulic brake device and a parking hand brake device. The front part of the utility model is composed of a brake pedal, a brake master cylinder, a push rod, a rocking arm, a high-pressure oil pipe, a brake hose, an assistant pump, a brake cam, and a brake shoe, etc. The parking hand brake device is composed of a ratchet wheel locking mechanism, a dowel steel, a brake handle, a straight arm, a rocking arm, a draw rod, a brake cam, and a brake shoe sheet, etc. The two devices respectively work by themselves without interfering each other. The braking device for a trailer of a walking tractor can be refitted on the basis of the braking device of the prime trailer. The utility model has the advantages of labour saving, high reliability, convenient maintenance, and large brake force. The braking time is shortened by about three times, and the braking distance is reduced by 40 percent.
Description
The utility model relates to a kind of trailer braking protection valve device, especially a kind of walker tractor trailer braking protection valve device.
The fully mechanical braking of walker tractor and the employing of remodeling tractor trailer thereof exists the braking effort at present, and brake response time is slow, and stopping distance is long, the very unreliable deficiency that waits of stopping brake locking.As reaching 2.6 meter per seconds
2Braking deceleration, stepping on brake pedal needs about 70 kilograms power, concerning common people, this power is unapproachable; Former car brake response time is long, is generally 0.8～1.2 second; Poor stop is generally 1.8～2.2 meters, can't be in case of emergency stopping-down timely and effectively.These all are the one of the main reasons of present the type trac. generation traffic accident.
It is short that the purpose of this utility model provides a kind of brake response time, brake laborsavingly, and stopping distance is lacked, and braking force is big, and locking is reliable, walker tractor trailer hydraulic pressure of being convenient to keep in repair and parking hand brake device.
Walker tractor trailer hydraulic brake system of the present utility model can be reequiped on the basis of former brake equipment, is provided with foot-operated hydraulic brake system and parking hand brake device, and two covering devices work alone separately, do not disturb mutually.Foot-operated hydraulic brake system is by total pump push rod (1), brake pedal (2), master brake cylinder (3), trailer girder (4), oil can (5), high pressure fuel pipe (6), brake hose support (7), brake hose (8), trailer hind axle (9), brake shoe brake cheek (10), brake shoe expander (11), brake rocker arm (12), wheel cylinder pull back spring (13), forked thread (14), divide pump push rod (15), brake cylinder (16) and T-pipe joint compositions such as (17).The parking hand brake device by brake-applying handle (18), ratchet lockable mechanism (19), dowel bar (20), straight-arm (21), brake central intermediate rod (22), about brake drag link (23), left and right sides brake rocker arm (24), brake shoe expander (25), brake strap (26) etc. and form.
Elaborate below in conjunction with accompanying drawing.
Fig. 1 is foot-operated hydraulic brake system scheme drawing.
Fig. 2 is a parking hand brake device scheme drawing.
Foot-operated hydraulic brake system is to use Bath main officer of Tibet basic principle, namely in balancing liquid, by the pressure that the outer active force on the part boundary face produces, will spread equably on the liquid each point, thus, in the airtight container of balance, external load acts on the valve piston, and the pressure same purpose of generation is on big piston, therefore, only need apply littler power can support load bigger on the big piston on the valve piston, and the power of two-piston is directly proportional with piston area. Also utilized simultaneously lever principle.
As shown in Figure 1, foot-operated hydraulic brake system is made up of total pump push rod (1), brake pedal (2), master brake cylinder (3), trailer girder (4), oil can (5), high pressure fuel pipe (6), brake hose support (7), brake hose (8), trailer hind axle (9), brake shoe brake cheek (10), brake shoe expander (11), brake rocker arm (12), wheel cylinder pull back spring (13), forked thread (14), branch pump push rod (15), brake cylinder (16) and T-pipe joint (17) etc.Brake pedal (2) increases the power of pedal, pass to total pump push rod (1), total pump push rod (1) passes to master brake cylinder (3), master brake cylinder (3) with the braking liquid supercharging in the oil can (5) with power, supply with two wheel cylinders (16) through oil pipe (6), guaranteeing simultaneously has certain residual pressure in the brake pipe.The high hydraulic brake fluid that T-pipe joint (17) is sent master cylinder here divides two-way to supply with two braking wheel cylinders, brake cylinder (16) changes hydraulic coupling into mechanical thrust, promote brake rocker arm (12) deflection through forked thread (14), and drive brake shoe expander (11) makes the outer Zhang Erqi brake action of brake strap (10).The brake-force transmission of foot-operated hydraulic brake system closes: depress brake pedal-→ total pump push rod-→ total pump piston-→ high pressure fuel pipe-→ flexible pipe-→ T-pipe joint-→ wheelcylinder piston-→ minute pump push rod and forked thread-→ brake rocker arm-→ brake shoe expander-→ brake strap opens outward-→ braking.
The parking hand brake device for full mechanical braking handle type, utilizes lever principle as shown in Figure 2, ratchet locking location.The parking hand brake device by brake-applying handle (18), ratchet lockable mechanism (19) dowel bar (20), straight-arm (21), brake central intermediate rod (22), about brake drag link (23), left and right sides brake rocker arm (24), brake shoe expander (25), brake strap (26) etc. and form.During stopping brake, pulling brake-applying handle (18) increases hand brake force, reach ratchet lockable mechanism (19) automatic lock fastening position, dowel bar (20) with the pulling force of handle through middle straight-arm (21) pass to central intermediate rod (22), about brake drag link (23) with central intermediate rod on the power of straight-arm pass to left and right sides brake rocker arm (24), drive brake shoe expander (25) and make outer of brake strap (26), reach brake action.Their brake-force transmission relation is: on shake hands brake-applying handle-→ dowel bar-→ central intermediate rod in the middle of straight-arm-→ central intermediate rod-→ central intermediate rod left and right sides straight-arm-→ left and right sides drag link-→ left and right sides brake rocker arm-→ brake shoe expander-→ brake strap opens outward-→ braking.
The effect of parking hand brake device is to guarantee braking effectively, and locking is reliable, in case hydraulic brake system is malfunctioning simultaneously, still available hand brake device effectively stops.These two brake equipments do not disturb in use mutually, are to be enclosed within on the branch pump push rod in last slide relative of dowel bar (20) and wheel cylinder forked thread pine by central straight-arm, forked thread is slided up and down along a minute pump push rod reach.
Hand towed vehicle brake equipment of the present utility model, brake laborsaving, comparable original device is saved the power of half, brake response time and stopping distance are short, brake response time reduces to 0.28 second by 0.96 second of former Che Liuci braking aviation value, shortens nearly three times, and stopping distance reduces to 1.36 meters for 2.25 meters by six times original braking aviation values, reduce 40%, braking deceleration is by six times original braking aviation value 2.6 meter per seconds
2Be increased to 4.19 meter per seconds
2, increasing by 61.7%, stopping brake power is big, and locking is reliable, and laden stops is one hour on 25% down ramp, and unit does not have any moving, and can reequip on the basis of former brake equipment, cost-cutting, maintenance is convenient.
Claims (1)
1, a kind of walker tractor trailer braking protection valve device is characterized in that partly being made up of foot-operated hydraulic brake system and parking hand brake device two.
(a) foot-operated hydraulic brake system is characterised in that total pump push rod (1) termination of brake pedal (2) lower end and master brake cylinder (3) is hinged, oil can (5) connects master brake cylinder (3), high pressure fuel pipe (6) and brake hose (8) are supported between the brake hose support (7), the push rod (15) of brake cylinder (16) connects cam (11) bar handle by forked thread (14), cam (11) places between two brake shoe brake cheek (10), and T-pipe joint (17) joins with brake hose (8) end.
(b) the parking hand brake device is characterised in that ratchet lockable mechanism (19) connects brake-applying handle (18) and dowel bar (20), brake central intermediate rod (22) and be fixed on the straight-arm (21), brake intermediate rod (23) about left and right sides brake rocker arm (24) captive joint and be clipped in the middle brake shoe expander (25) of brake strap (26).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87210275 CN87210275U (en) | 1987-07-16 | 1987-07-16 | Braking device for trailer of walking tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87210275 CN87210275U (en) | 1987-07-16 | 1987-07-16 | Braking device for trailer of walking tractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87210275U true CN87210275U (en) | 1988-09-28 |
Family
ID=4825225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87210275 Withdrawn CN87210275U (en) | 1987-07-16 | 1987-07-16 | Braking device for trailer of walking tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87210275U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100368240C (en) * | 2005-08-03 | 2008-02-13 | 力帆实业(集团)有限公司 | Four-wheel braking double circuit hydraulic braking arrangement |
| CN102219014A (en) * | 2010-04-16 | 2011-10-19 | 天津建筑机械厂 | Emergency brake hydraulic power assisting device |
| CN102303592A (en) * | 2011-08-25 | 2012-01-04 | 天津先泰达工程机械技术有限公司 | Full-automatic braking and balancing combined device of trailer |
| CN102991478A (en) * | 2012-09-10 | 2013-03-27 | 石荣斌 | Front wheel iron brake of walking tractor |
-
1987
- 1987-07-16 CN CN 87210275 patent/CN87210275U/en not_active Withdrawn
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100368240C (en) * | 2005-08-03 | 2008-02-13 | 力帆实业(集团)有限公司 | Four-wheel braking double circuit hydraulic braking arrangement |
| CN102219014A (en) * | 2010-04-16 | 2011-10-19 | 天津建筑机械厂 | Emergency brake hydraulic power assisting device |
| CN102219014B (en) * | 2010-04-16 | 2013-10-09 | 天津建筑机械厂 | Emergency brake hydraulic power assisting device |
| CN102303592A (en) * | 2011-08-25 | 2012-01-04 | 天津先泰达工程机械技术有限公司 | Full-automatic braking and balancing combined device of trailer |
| CN102991478A (en) * | 2012-09-10 | 2013-03-27 | 石荣斌 | Front wheel iron brake of walking tractor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |