CN112498313B - Fork truck micro-motion and braking system and diesel fork truck - Google Patents

Fork truck micro-motion and braking system and diesel fork truck Download PDF

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Publication number
CN112498313B
CN112498313B CN202011454806.XA CN202011454806A CN112498313B CN 112498313 B CN112498313 B CN 112498313B CN 202011454806 A CN202011454806 A CN 202011454806A CN 112498313 B CN112498313 B CN 112498313B
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China
Prior art keywords
pedal
connecting rod
valve
rotatably connected
air brake
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CN202011454806.XA
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Chinese (zh)
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CN112498313A (en
Inventor
王永志
梁永海
钟志华
徐汉宾
许德鹏
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Zoomlion Heavy Machinery Anhui Industrial Vehicle Co ltd
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Zoomlion Heavy Machinery Anhui Industrial Vehicle Co ltd
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Priority to CN202011454806.XA priority Critical patent/CN112498313B/en
Publication of CN112498313A publication Critical patent/CN112498313A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60TVEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T7/00Brake-action initiating means
    • B60T7/02Brake-action initiating means for personal initiation
    • B60T7/04Brake-action initiating means for personal initiation foot actuated
    • B60T7/06Disposition of pedal
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, 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
    • B66F9/00Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06Devices 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
    • B66F9/075Constructional features or details
    • B66F9/07509Braking
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, 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
    • B66F9/00Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
    • B66F9/06Devices 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
    • B66F9/075Constructional features or details
    • B66F9/07572Propulsion arrangements

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Forklifts And Lifting Vehicles (AREA)
  • Braking Arrangements (AREA)

Abstract

The invention discloses a forklift inching and braking system which comprises an air brake valve, a pedal bracket and a pedal assembly, wherein the pedal assembly is rotatably connected with the pedal bracket and used for triggering the air brake valve, the pedal assembly is connected with an inching valve rod on a hydraulic torque converter through a linkage mechanism, when the pedal assembly is stepped down, the air brake valve is triggered to work, and meanwhile, the pedal assembly drives the inching valve rod of the inching valve of the hydraulic torque converter to move through the linkage mechanism to trigger the inching valve of the hydraulic torque converter to work. The forklift inching and braking system is simple in structure and convenient to operate, can protect a clutch by controlling the synchronous work of the air brake valve and the inching valve, prolongs the service life of the gearbox, improves the controllability of the whole operating system and the safety of the whole forklift, and reduces the cost. The invention also discloses the diesel fork lift truck.

Description

Fork truck micro-motion and braking system and diesel fork truck
Technical Field
The invention belongs to the technical field of forklifts, and particularly relates to a forklift micro-motion and braking system and a diesel fork lift truck.
Background
At present, all hydraulic gearboxes for internal combustion forklifts are provided with a micro-motion control mechanism, a micro-motion pedal is stepped on, a valve rod moves, pressure in a hydraulic torque converter is weakened, output power of the gearboxes is cut off, the micro-motion control is controlled by a left pedal, the braking is controlled by a right pedal, the operation is complex, and when the hydraulic gearboxes are braked, a lot of drivers directly step on the brake pedal without stepping on the micro-motion pedal, and friction plates in clutches of the gearboxes can be burnt out due to long-time operation.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a forklift inching and braking system, which aims to protect a clutch and prolong the service life of a gearbox.
In order to achieve the purpose, the invention adopts the technical scheme that: fork truck fine motion and braking system, including air brake valve, pedal support and with the pedal support rotate be connected and be used for triggering the pedal assembly of air brake valve, the pedal assembly passes through the link gear and is connected with the inching valve pole on the torque converter, when stepping on the pedal assembly, triggers the air brake valve carries out work, and the pedal assembly drives the inching valve pole of torque converter inching valve through the link gear simultaneously and removes, triggers torque converter inching valve and carries out work.
The link gear with the footboard assembly rotates the head rod of connecting, rotatable set up in on the footboard support and rotate the coupling assembling of being connected, rotate the second connecting rod of being connected and rotatable set up and rotate the third connecting rod of being connected with the second connecting rod with the coupling assembling with the head rod, the third connecting rod with inching valve pole rotates and connects.
The third connecting rod is rotatably arranged on the micro-motion support, and the linkage mechanism further comprises a return spring which is connected with the micro-motion support and the third connecting rod and is used for resetting the third connecting rod.
The reset spring is a tension spring.
Coupling assembling including set up in connecting axle on the pedal support, be connected with the connecting axle and with the head rod rotates the first otic placode of connecting and be connected with the connecting axle and with the second otic placode of connecting is rotated to the second connecting rod.
The pedal assembly comprises a brake pedal rotatably connected with the pedal support, a third lug plate arranged on the brake pedal and rotatably connected with the linkage mechanism, and a convex shaft arranged on the brake pedal and used for triggering the air brake valve.
The invention also provides a diesel fork lift truck which comprises the fork lift truck micro-motion and braking system.
The forklift inching and braking system is simple in structure and convenient to operate, can protect a clutch by controlling the synchronous work of the air brake valve and the inching valve, prolongs the service life of the gearbox, improves the controllability of the whole operating system and the safety of the whole forklift, and reduces the cost.
Drawings
The description includes the following figures, the contents shown are respectively:
FIG. 1 is a schematic diagram of the construction of the truck inching and braking system of the present invention;
FIG. 2 is a schematic structural view of the pedal assembly;
labeled as: 1. a pedal bracket; 2. an air brake valve; 3. a pedal assembly; 31. a rotating shaft; 32. a protruding shaft; 33. a third ear panel; 4. a connecting shaft; 5. a first connecting rod; 6. a second connecting rod; 7. a micro-motion bracket; 8. a third connecting rod; 9. a inching valve stem; 10. a first ear plate; 11. a second ear panel.
Detailed Description
The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for a purpose of helping those skilled in the art to more fully, accurately and deeply understand the concept and technical solution of the present invention and to facilitate its implementation.
As shown in figure 1, the invention provides a forklift inching and braking system, which comprises an air brake valve 2, a pedal bracket 1 and a pedal assembly 3 which is rotatably connected with the pedal bracket 1 and used for triggering the air brake valve 2, wherein the pedal assembly 3 is connected with a inching valve rod 9 on a hydraulic torque converter through a linkage mechanism, when the pedal assembly 3 is stepped down, the air brake valve 2 is triggered to work, and meanwhile, the pedal assembly 3 drives the inching valve rod 9 of the hydraulic torque converter inching valve to move through the linkage mechanism to trigger the hydraulic torque converter inching valve to work, so that the pressure in the hydraulic torque converter is reduced, and the power output of a gearbox can be cut off.
Specifically, as shown in fig. 1, a pedal bracket 1 is fixedly mounted on a forklift body, an air brake valve 2 is mounted on the pedal bracket 1, the air brake valve 2 is located below a pedal assembly 3, and a rotation center line of the pedal assembly 3 is parallel to a first direction. The linkage mechanism is connected with the pedal assembly 3 in a rotating mode through a first connecting rod 5, the connecting assembly is rotatably arranged on the pedal support 1 and is connected with the first connecting rod 5 in a rotating mode, the second connecting rod 6 is connected with the connecting assembly in a rotating mode, the third connecting rod 8 is rotatably arranged and is connected with the second connecting rod 6 in a rotating mode, and the third connecting rod 8 is connected with the inching valve rod 9 in a rotating mode. The connecting assembly comprises a connecting shaft 4 arranged on the pedal support 1, a first lug plate 10 connected with the connecting shaft 4 and rotatably connected with the first connecting rod 5, and a second lug plate 11 connected with the connecting shaft 4 and rotatably connected with the second connecting rod 6. The axis of connecting axle 4 is parallel with first direction, and pedal support 1 has the shaft hole that lets connecting axle 4 pass, first otic placode 10 and second otic placode 11 respectively with the relative both ends fixed connection of connecting axle 4, and first otic placode 10 and second otic placode 11 all have certain length. The length directions of the first connecting rod 5 and the second connecting rod 6 are perpendicular to the first direction, one end of the first connecting rod 5 in the length direction is rotatably connected with the pedal assembly 3, the other end of the first connecting rod 5 in the length direction is rotatably connected with one end of the first lug plate 10 in the length direction, and the other end of the first lug plate 10 in the length direction is fixedly connected with the connecting shaft 4. One end of the second connecting rod 6 in the length direction is rotatably connected with one end of the second lug plate 11 in the length direction, the other end of the second lug plate 11 in the length direction is fixedly connected with the connecting shaft 4, the other end of the second connecting rod 6 in the length direction is rotatably connected with one end of the third connecting rod 8 in the length direction, and the other end of the third connecting rod 8 in the length direction is rotatably connected with the inching valve rod 9. An included angle is formed between the length direction of the first ear plate 10 and the length direction of the second ear plate 11, and the included angle is an acute angle.
As shown in fig. 1, the third connecting rod 8 is rotatably disposed on the micro-motion bracket 7, the third connecting rod 8 is rotatably connected to the micro-motion bracket 7 at a position between both ends in the longitudinal direction, and the rotation center line of the third connecting rod 8 is parallel to the first direction. The micro-motion bracket 7 is fixedly arranged on the gearbox. After the treading force applied to the brake pedal is removed, the ejector rod of the air brake valve moves upwards, the air brake valve is closed, and under the action of the air brake valve, the ejector rod of the air brake valve can push the brake pedal to rotate upwards, so that the brake pedal resets, and the brake pedal drives the linkage mechanism to reset.
As shown in fig. 1 and 2, the pedal assembly 3 is an integrated structure, and the pedal assembly 3 includes a brake pedal rotatably connected to the pedal bracket 1, a third lug plate 33 disposed on the brake pedal and rotatably connected to the linkage mechanism, and a protruding shaft 32 disposed on the brake pedal and used for triggering the air brake valve 2, wherein one of the brake pedals is disposed. The lower end of the brake pedal is rotatably connected with the pedal bracket 1 through a rotating shaft 31, and the brake pedal is used for a driver to step on. The third ear plate 33 is fixedly connected with the bottom surface of the brake pedal, the third ear plate 33 is rotatably connected with the upper end of the first connecting rod 5, and the lower end of the first connecting rod 5 is rotatably connected with the first ear plate 10. The protruding shaft 32 is positioned between the third lug plate 33 and the rotating shaft 31, the air brake valve 2 is positioned below the protruding shaft 32, and the air brake valve 2 is connected with the air storage tank and the booster pump. The air brake valve 2 is positioned between the booster pump and the air storage tank, the air brake valve 2 is used for controlling air flow, and the booster pump is controlled by air pressure and provides hydraulic pressure for the brake.
When the brake pedal is stepped on, the convex shaft 32 and the brake pedal synchronously rotate downwards, after the convex shaft 32 is contacted with the ejector rod of the air brake valve 2, the convex shaft 32 pushes the ejector rod of the air brake valve 2 to move downwards, so that the air brake valve 2 starts to work, the air brake valve 2 is opened, the forklift is braked, meanwhile, the brake pedal drives the inching valve rod 9 to move through the linkage mechanism, so that the inching valve of the hydraulic torque converter starts to work, the inching effect is achieved, and linkage is achieved.
The invention also provides a diesel fork lift truck, which comprises the fork lift truck micro-motion and braking system with the structure. The specific structure of the forklift inching and braking system can be referred to fig. 1 and 2, and is not described in detail herein. Since the forklift of the present invention includes the forklift inching and braking system in the above-described embodiment, it has all the advantages of the forklift inching and braking system described above.
The invention is described above with reference to the accompanying drawings. It is to be understood that the specific implementations of the invention are not limited in this respect. Various insubstantial improvements are made by adopting the method conception and the technical scheme of the invention; the present invention is not limited to the above embodiments, and can be modified in various ways.

Claims (3)

1. Fork truck fine motion and braking system, including air brake valve, footboard support and with footboard support rotate be connected and be used for triggering the footboard assembly of air brake valve, its characterized in that: the pedal assembly is connected with an inching valve rod on the hydraulic torque converter through a linkage mechanism, when the pedal assembly is stepped on, the air brake valve is triggered to work, and meanwhile, the pedal assembly drives the inching valve rod of the hydraulic torque converter inching valve to move through the linkage mechanism to trigger the hydraulic torque converter inching valve to work;
the pedal bracket is fixedly arranged on the forklift body, the air brake valve is arranged on the pedal bracket and is positioned below the pedal assembly, and the rotating center line of the pedal assembly is parallel to the first direction; the air brake valve is used for controlling air flow, and the booster pump is controlled by air pressure and provides hydraulic pressure for the brake;
the linkage mechanism is rotatably connected with the pedal assembly through a first connecting rod, the connecting assembly is rotatably arranged on the pedal support and is rotatably connected with the first connecting rod, the second connecting rod is rotatably connected with the connecting assembly, the third connecting rod is rotatably arranged and is rotatably connected with the second connecting rod, and the third connecting rod is rotatably connected with the inching valve rod;
the connecting assembly comprises a connecting shaft arranged on the pedal bracket, a first lug plate connected with the connecting shaft and rotatably connected with the first connecting rod, and a second lug plate connected with the connecting shaft and rotatably connected with the second connecting rod; the axis of the connecting shaft is parallel to the first direction, the pedal bracket is provided with a shaft hole for the connecting shaft to pass through, the first lug plate and the second lug plate are respectively and fixedly connected with the two opposite ends of the connecting shaft, and the first lug plate and the second lug plate have certain lengths; the length direction of the first connecting rod and the second connecting rod is vertical to the first direction, one end of the first connecting rod in the length direction is rotatably connected with the pedal assembly, the other end of the first connecting rod in the length direction is rotatably connected with one end of the first lug plate in the length direction, and the other end of the first lug plate in the length direction is fixedly connected with the connecting shaft;
one end of the second connecting rod in the length direction is rotatably connected with one end of the second lug plate in the length direction, the other end of the second lug plate in the length direction is fixedly connected with the connecting shaft, the other end of the second connecting rod in the length direction is rotatably connected with one end of the third connecting rod in the length direction, and the other end of the third connecting rod in the length direction is rotatably connected with the inching valve rod; an included angle is formed between the length direction of the first ear plate and the length direction of the second ear plate and is an acute angle;
the third connecting rod is rotatably arranged on the micro-motion bracket, the third connecting rod is rotatably connected with the micro-motion bracket at a position between two ends in the length direction, the rotating center line of the third connecting rod is parallel to the first direction, and the micro-motion bracket is fixedly arranged on the gearbox; after the treading force applied to the brake pedal is removed, the ejector rod of the air brake valve moves upwards, the air brake valve is closed, and under the action of the air brake valve, the ejector rod of the air brake valve can push the brake pedal to rotate upwards, so that the brake pedal is reset, and the brake pedal drives the linkage mechanism to also reset;
the pedal assembly is of an integrated structure and comprises a brake pedal rotationally connected with the pedal bracket, a third lug plate arranged on the brake pedal and rotationally connected with the linkage mechanism, and a convex shaft arranged on the brake pedal and used for triggering the air brake valve, wherein one brake pedal is arranged; the lower end of the brake pedal is rotatably connected with the pedal bracket through a rotating shaft, and the brake pedal is used for enabling a driver to tread;
the third lug plate is fixedly connected with the bottom surface of the brake pedal, the third lug plate is rotatably connected with the upper end of the first connecting rod, and the lower end of the first connecting rod is rotatably connected with the first lug plate;
when the brake pedal is stepped on, the convex shaft and the brake pedal synchronously rotate downwards, and after the convex shaft is contacted with the ejector rod of the air brake valve, the convex shaft pushes the ejector rod of the air brake valve to move downwards, so that the air brake valve starts to work, the air brake valve is opened, the forklift is braked, meanwhile, the brake pedal drives the inching valve rod to move through the linkage mechanism, so that the inching valve of the hydraulic torque converter starts to work, and the inching effect is achieved, and linkage is achieved.
2. The forklift jog and brake system according to claim 1 wherein: the convex shaft is positioned between the third lug plate and the rotating shaft, the air brake valve is positioned below the convex shaft, the air brake valve is connected with the air storage tank and the booster pump, and the air brake valve is positioned between the booster pump and the air storage tank.
3. Diesel fork truck, its characterized in that: comprising a forklift jog and brake system according to claim 1 or 2.
CN202011454806.XA 2020-12-10 2020-12-10 Fork truck micro-motion and braking system and diesel fork truck Active CN112498313B (en)

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CN202011454806.XA CN112498313B (en) 2020-12-10 2020-12-10 Fork truck micro-motion and braking system and diesel fork truck

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Application Number Priority Date Filing Date Title
CN202011454806.XA CN112498313B (en) 2020-12-10 2020-12-10 Fork truck micro-motion and braking system and diesel fork truck

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CN112498313B true CN112498313B (en) 2022-02-22

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03248929A (en) * 1990-02-26 1991-11-06 Toyota Autom Loom Works Ltd Inching control device for industry vehicle
JP2004042813A (en) * 2002-07-12 2004-02-12 Nippon Yusoki Co Ltd Brake unit of forklift
CN203186325U (en) * 2013-02-01 2013-09-11 奇瑞重工股份有限公司 Forklift braking priority selection device
CN203305987U (en) * 2013-06-22 2013-11-27 芜湖盛力科技股份有限公司 Construction machinery brake pedal
CN207106661U (en) * 2017-08-25 2018-03-16 宁波如意股份有限公司 One kind fork automobile cab
CN109927689A (en) * 2017-12-18 2019-06-25 比亚迪股份有限公司 A kind of separate type service braking device and fork truck

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CN202156400U (en) * 2011-05-30 2012-03-07 杭叉集团股份有限公司 Brake system of forklift
CN103612626B (en) * 2013-12-02 2015-12-09 杭叉集团股份有限公司 Pneumatic control system of large-tonnage forklift
CN103738318A (en) * 2013-12-27 2014-04-23 芜湖盛力科技股份有限公司 Single-chamber piston air brake valve for commercial vehicle diesel engine brake system
CN204110018U (en) * 2014-08-10 2015-01-21 诸暨企航机械科技有限公司 Air brake valve assembly
CN204641716U (en) * 2015-05-08 2015-09-16 中联重科安徽工业车辆有限公司 A kind of fork truck service braking device
CN205387126U (en) * 2016-01-15 2016-07-20 浙江荣众机械有限公司 Automatically controlled air brake valve
CN106627526A (en) * 2016-09-18 2017-05-10 广西柳工机械股份有限公司 Pneumatic brake pedal device
CN209079880U (en) * 2018-11-30 2019-07-09 浙江锦安汽车零部件有限公司 A kind of automobile auxiliary air brake valve assembly
CN110861626A (en) * 2019-11-29 2020-03-06 芜湖盛力科技股份有限公司 Air brake valve structure for vehicle brake system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03248929A (en) * 1990-02-26 1991-11-06 Toyota Autom Loom Works Ltd Inching control device for industry vehicle
JP2004042813A (en) * 2002-07-12 2004-02-12 Nippon Yusoki Co Ltd Brake unit of forklift
CN203186325U (en) * 2013-02-01 2013-09-11 奇瑞重工股份有限公司 Forklift braking priority selection device
CN203305987U (en) * 2013-06-22 2013-11-27 芜湖盛力科技股份有限公司 Construction machinery brake pedal
CN207106661U (en) * 2017-08-25 2018-03-16 宁波如意股份有限公司 One kind fork automobile cab
CN109927689A (en) * 2017-12-18 2019-06-25 比亚迪股份有限公司 A kind of separate type service braking device and fork truck

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