CN106150794B - Forklift steering room overhead guard with noise-reducing structure - Google Patents

Forklift steering room overhead guard with noise-reducing structure Download PDF

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Publication number
CN106150794B
CN106150794B CN201610689388.XA CN201610689388A CN106150794B CN 106150794 B CN106150794 B CN 106150794B CN 201610689388 A CN201610689388 A CN 201610689388A CN 106150794 B CN106150794 B CN 106150794B
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China
Prior art keywords
noise
expansion cavity
frame beam
right frame
lower right
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CN201610689388.XA
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Chinese (zh)
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CN106150794A (en
Inventor
孙光英
田红周
师学银
张冬林
高静轩
卓纳麟
王平
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Anhui Heli Co Ltd
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Anhui Heli Co Ltd
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Priority to CN201610689388.XA priority Critical patent/CN106150794B/en
Publication of CN106150794A publication Critical patent/CN106150794A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1288—Intake silencers ; Sound modulation, transmission or amplification combined with or integrated into other devices ; Plurality of air intake silencers
    • 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
    • B66F9/07545—Overhead guards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1205—Flow throttling or guiding
    • F02M35/1233—Flow throttling or guiding by using expansion chambers in the air intake flow path
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/12—Intake silencers ; Sound modulation, transmission or amplification
    • F02M35/1255—Intake silencers ; Sound modulation, transmission or amplification using resonance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
    • F02M35/16—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines characterised by use in vehicles
    • F02M35/162—Motorcycles; All-terrain vehicles, e.g. quads, snowmobiles; Small vehicles, e.g. forklifts

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

The present invention relates to the forklift steering room overhead guards with noise-reducing structure.The right rear support leg of forklift steering room overhead guard is connected to form air inlet pipeline with lower right frame beam, and right rear support leg is equipped with air inlet, is equipped with shutter at air inlet；Lower right frame beam is equipped with gas outlet, and third expansion cavity, the second expansion cavity, the first expansion cavity and resonant cavity are successively arranged in lower right frame beam, forms silencer mechanism；When work, air is entered by shutter, enters motor intake manifold by gas outlet by third expansion cavity, the second expansion cavity and the first expansion cavity；The elimination path of noise is with airflow direction on the contrary, the induction noise of engine is entered by gas outlet, and by the first expansion cavity, low frequency is cut down in resonant cavity, using the second expansion cavity and third expansion cavity, successively reduces noise；When engine full speed, the noise at shutter is down to 108dB or less.

Description

Forklift steering room overhead guard with noise-reducing structure
Technical field
The present invention relates to a kind of fork truck overhead guards, more particularly, to a kind of forklift protecting top frame with silencing function device.
Background technique
Fork truck is as logistics transportation tool important in current modern industrial production, as application field is more and more extensive, Also higher and higher, especially noise vibration is required the operating comfort of complete machine.Diesel fork lift truck engine aspirating system generally by Right rear support leg of the overhead guard of forklift steering room with shutter, air filter, the inlet manifold composition for connecting hose and engine.It is empty Gas enters the right rear support leg inner cavity of overhead guard by shutter, comes out from rear support leg inner cavity and enters air filter, then comes out and lead to from air filter Cross the inlet manifold that hose enters engine.Inflow noise is since air intake valve opens closure production in engine working process Raw, transmission path is then issued by inlet manifold, against airflow direction, is transmitted to overhead guard air inlet shutter.Due to air inlet hundred Leaf window is located at the outer upper side of the right rear support leg of overhead guard, and air inlet position height is higher, is substantially above operator's right side of head, because This, inflow noise is affected to operator, when engine full speed at overhead guard air inlet shutter level of noise generally in 112dB Left and right.
Summary of the invention
In order to reduce air inlet noise, forklift operator comfort is improved, the present invention provides a kind of fork with noise-reducing structure Vehicle driver's cabin overhead guard.
Forklift steering room overhead guard with noise-reducing structure includes by right anterior branch leg 1, left front supporting leg 9, right rear support leg 3, a left side The forklift steering room overhead guard that rear support leg 7, lower right frame beam 4, left lower transverse beam 8 and top frame 2 form；It is the right rear support leg 3, left back Supporting leg 7, lower right frame beam 4 and left lower transverse beam 8 are Guan Liang；The right rear support leg 3 is connected to form air inlet pipeline with lower right frame beam 4, The upper outside of right rear support leg 3 is equipped with air inlet 23, and the inside middle portion of lower right frame beam 4 is equipped with gas outlet 5；
Shutter 10 is equipped at air inlet 23 on the right rear support leg 3；
Third expansion cavity 21, the second expansion cavity 20, are successively arranged in 4 one end of lower right frame beam being connected to right rear support leg 3 One expansion cavity 19 and resonant cavity 17 form silencer mechanism, and wherein third expansion cavity 21 is connected to the lower end of right rear support leg 3, bottom right Gas outlet 5 on crossbeam 4 is connected to first expansion cavity 19；
When work, air is entered by shutter 10, by third expansion cavity 21, the second expansion cavity 20 and the first expansion cavity 19, motor intake manifold is entered by gas outlet 5；Noise eliminates path with airflow direction on the contrary, the induction noise of engine Entered by gas outlet 5, by the first expansion cavity 19, low frequency is cut down in resonant cavity 17, expands using the second expansion cavity 20 and third Chamber 21 is opened, noise is successively reduced；When engine full speed, the noise at shutter 10 is down to 108dB or less.
The technical solution further limited is as follows:
It is connected to the roof in the lower right frame beam 4 of one end with right rear support leg 3 and is equipped with upright upper spacer 12, upper spacer 12 Gap between bottom wall in bottom edge and lower right frame beam 4 forms air flue, the space between upper spacer 12 and one end of lower right frame beam 4 For third expansion cavity 21, for reducing the induction noise of 200~700Hz frequency band；
Bottom wall in the lower right frame beam 4 adjacent with upper spacer 12 is equipped with upright lower clapboard 13, the top margin of lower clapboard 13 Gap between the roof in lower right frame beam 4 forms air flue, and the space between upper spacer 12 and lower clapboard 13 is the second expansion Chamber 20, for reducing the induction noise of 500~1500Hz frequency band；
It is equipped with the first upright sealing plate 14 in the lower right frame beam 4 adjacent with lower clapboard 13, the first sealing plate 14 is by lower right frame beam 4 Transversal face closure；The middle part of first sealing plate 14 offers stomata 18, and the space between lower clapboard 13 and the first sealing plate 14 is the One expansion cavity 19, for reducing the induction noise of 300~900Hz frequency band；
The second upright sealing plate 15 is equipped in the lower right frame beam 4 adjacent with the first sealing plate 14, the second sealing plate 15 is horizontal by bottom right The transversal face closure of beam 4；Space between first sealing plate 14 and the second sealing plate 15 is resonant cavity 17, for reducing 100~200Hz The induction noise of frequency band.
The spacing between roof in the top margin and lower right frame beam 4 of the upper spacer 13 is 25mm.
The spacing between bottom wall in the bottom edge and lower right frame beam 4 of the lower clapboard 12 is 25mm.
The diameter of the stomata 18 is 5~6mm.
The area of air inlet 23 on the right rear support leg 3 is that the area of the cross section of rear support leg 3 is suitable.
Right rear support leg 3 and 4 connectivity part of lower right frame beam are equipped with throttling through-hole 22, and the throttling through-hole 22 is located at lower right frame beam 4 Roof on.
The diameter of the throttling through-hole 22 is 45~50mm, and the area of throttling through-hole 22 is the cross section of right rear support leg 3 One third.
The volume of first expansion cavity 19 is 990~1010cm3, the volume of the second expansion cavity 20 is 540~560cm3, The volume of third expansion cavity 21 is 610~630cm3, the volume of resonant cavity 17 is 450~470 cm3。
The shutter 10 is equipped with 8 or more window leaves, and the spacing between adjacent windows leaf is 15 mm.
Advantageous effects of the invention embody in the following areas:
1. the present invention is in overhead guard airflow channel by increasing noise-reducing structure, when work, air from overhead guard it is right after prop up Leg shutter enters, and flows through each cavity in the lower beam for being connected to right rear support leg, enters back into the air inlet discrimination of air filter, engine Pipe, and noise eliminates path and airflow direction on the contrary, the noise generated when engine operation at inlet manifold, then by overhead guard Gas outlet enters, and by the first expansion cavity, low frequency is cut down in resonant cavity, using the second expansion cavity and third expansion cavity, successively Noise is reduced, to reduce noise at overhead guard air inlet shutter.After structure is improved, air inlet shutter when engine full speed Place's noise is down to 108dB hereinafter, reducing 4dB or so compared with original structure.
2. structure of the invention is compact to design, it is smaller for fork truck inner space can not increase admission air silencer in the case where, It adopts the structure, not only saves space, but also fork truck air inlet noise can be effectively reduced, reduce operator's noise in one's ear.
It is mainly welded by steel plate 3. structure is improved, at low cost, manufacturing process is simple.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention.
Fig. 2 is the A of Fig. 1 to perspective view.
Fig. 3 is air inlet louvers structural schematic diagram in Fig. 2.
Fig. 4 is the partial section enlarged view in Fig. 1.
Serial number in upper figure: right anterior branch leg 1, top frame 2, right rear support leg 3, lower right frame beam 4, gas outlet 5, rear left and right crossbeam are drawn Bar 6, left back supporting leg 7, left lower transverse beam 8, left front supporting leg 9, air inlet louvers 10, lower beam U-shaped board 11, upper spacer 12, lower clapboard 13, the first sealing plate 14, the second sealing plate 15, interior side seal board 16, resonant cavity 17, stomata 18, the first expansion cavity 19, the second expansion cavity 20, third expansion cavity 21, throttling through-hole 22, air inlet 23.
Specific embodiment
With reference to the accompanying drawing, the present invention is further described by embodiment.
Referring to Fig. 1, the forklift steering room overhead guard with noise-reducing structure includes by behind right anterior branch leg 1, left front supporting leg 9, the right side The forklift steering room overhead guard that supporting leg 3, left back supporting leg 7, lower right frame beam 4, left lower transverse beam 8 and top frame 2 form；It is propped up behind the right side Leg 3, left back supporting leg 7, lower right frame beam 4 and left lower transverse beam 8 are Guan Liang；The right rear support leg 3 be connected to lower right frame beam 4 to be formed into Air pipe, the upper outside of right rear support leg 3 are equipped with air inlet 23, and the inside middle portion of lower right frame beam 4 is equipped with gas outlet 5.
The area of air inlet 23 on right rear support leg 3 is twice of the cross section of rear support leg 3, is equipped at air inlet 23 Shutter 10；10 gate leaves are installed, the spacing between adjacent windows leaf is 15 mm on shutter 10.
Third expansion cavity 21, the second expansion cavity 20, are successively arranged in 4 one end of lower right frame beam being connected to right rear support leg 3 One expansion cavity 19 and resonant cavity 17 form silencer mechanism；Wherein third expansion cavity 21 is connected to the lower end of right rear support leg 3, bottom right Gas outlet 5 on crossbeam 4 is connected to first expansion cavity 19；
Third expansion cavity 21, the second expansion cavity 20, the first expansion cavity 19 and resonant cavity 17 specific structure be described as follows:
Upright upper spacer 12 is fixedly installed on the roof being connected in the lower right frame beam 4 of one end with right rear support leg 3, on every The spacing between bottom wall in the bottom edge and lower right frame beam 4 of plate 12 is 25mm, forms air flue；Upper spacer 12 and lower right frame beam 4 Space between one end is third expansion cavity 21, for reducing the induction noise of 200~700Hz frequency band；
Upright lower clapboard 13, lower clapboard 13 are fixedly installed on bottom wall in the lower right frame beam 4 adjacent with upper spacer 12 Top margin and lower right frame beam 4 in roof between spacing be 25mm, formed air flue；Sky between upper spacer 12 and lower clapboard 13 Between be the second expansion cavity 20, for reducing the induction noise of 500~1500Hz frequency band；
The first upright sealing plate 14 is fixedly installed in the lower right frame beam 4 adjacent with lower clapboard 13, the first sealing plate 14 will be right The transversal face closure of lower beam 4；The middle part of first sealing plate 14 offers stomata 18, and the diameter of stomata 18 is 5mm.13 He of lower clapboard Space between first sealing plate 14 is the first expansion cavity 19, for reducing the induction noise of 300~900Hz frequency band；
The second upright sealing plate 15 is fixedly installed in the lower right frame beam 4 adjacent with the first sealing plate 14, the second sealing plate 15 will The transversal face closure of lower right frame beam 4；Space between first sealing plate 14 and the second sealing plate 15 is resonant cavity 17, for reducing 100 The induction noise of~200Hz frequency band.
The volume of first expansion cavity 19 is 1008cm3, the volume of the second expansion cavity 20 is 552cm3, third expansion cavity 21 Volume is 620cm3, the volume of resonant cavity 17 is 460 cm3。
Right rear support leg 3 and 4 connectivity part of lower right frame beam offer throttling through-hole 22, and throttling through-hole 22 is located at lower right frame beam 4 On roof, the diameter of throttling through-hole 22 is 45mm, and the area of throttling through-hole 22 is the one third of the cross section of right rear support leg 3.
When work, air is entered by shutter 10, by third expansion cavity 21, the second expansion cavity 20 and the first expansion cavity 19, motor intake manifold is entered by gas outlet 5；Noise eliminates path with airflow direction on the contrary, the induction noise of engine Entered by gas outlet 5, by the first expansion cavity 19, low frequency is cut down in resonant cavity 17, expands using the second expansion cavity 20 and third Chamber 21 is opened, noise is successively reduced, to reduce noise at shutter；When engine full speed, the noise at shutter 10 is down to 108dB or less.

Claims (9)

1. the forklift steering room overhead guard with noise-reducing structure, including by right anterior branch leg (1), left front supporting leg (9), right rear support leg (3), the forklift steering room overhead guard that left back supporting leg (7), lower right frame beam (4), left lower transverse beam (8) and top frame (2) form；It is described Right rear support leg (3), left back supporting leg (7), lower right frame beam (4) and left lower transverse beam (8) are Guan Liang；The right rear support leg (3) and the right side Lower beam (4) connection forms air inlet pipeline, and the upper outside of right rear support leg (3) is equipped with air inlet (23), in lower right frame beam (4) Gas outlet (5) are equipped on the inside of portion, it is characterised in that:
Shutter (10) are equipped at air inlet (23) on the right rear support leg (3)；
Third expansion cavity (21), the second expansion cavity are successively arranged in lower right frame beam (4) one end being connected to right rear support leg (3) (20), the first expansion cavity (19) and resonant cavity (17) form silencer mechanism, and wherein third expansion cavity (21) is connected to right rear support leg (3) lower end, the gas outlet (5) on lower right frame beam (4) are connected to first expansion cavity (19)；Specific structure is:
The roof being connected in the lower right frame beam (4) of one end with right rear support leg (3) is equipped with upright upper spacer (12), upper spacer (12) the gap formation air flue between the bottom wall in bottom edge and lower right frame beam (4), the one of upper spacer (12) and lower right frame beam (4) Space between end is third expansion cavity (21), for reducing the induction noise of 200~700Hz frequency band；
Bottom wall with upper spacer (12) in adjacent lower right frame beam (4) is equipped with upright lower clapboard (13), lower clapboard (13) Gap between roof in top margin and lower right frame beam (4) forms air flue, the space between upper spacer (12) and lower clapboard (13) For the second expansion cavity (20), for reducing the induction noise of 500~1500Hz frequency band；
It is equipped with upright the first sealing plate (14) in the lower right frame beam (4) adjacent with lower clapboard (13), the first sealing plate (14) is by bottom right The transversal face closure of crossbeam (4)；It is offered in the middle part of first sealing plate (14) stomata (18), lower clapboard (13) and the first sealing plate (14) Between space be the first expansion cavity (19), for reducing the induction noise of 300~900Hz frequency band；
Upright the second sealing plate (15) is equipped in the lower right frame beam (4) adjacent with the first sealing plate (14), the second sealing plate (15) will be right The transversal face closure of lower beam (4)；Space between first sealing plate (14) and the second sealing plate (15) is resonant cavity (17), for dropping The induction noise of low 100~200Hz frequency band；
When work, air is entered by shutter (10), by third expansion cavity (21), the second expansion cavity (20) and the first expansion cavity (19), enter motor intake manifold by gas outlet (5)；Noise eliminates path with airflow direction on the contrary, the air inlet of engine Noise is entered by gas outlet (5), and by the first expansion cavity (19), low frequency is cut down in resonant cavity (17), using the second expansion cavity (20) and third expansion cavity (21), noise is successively reduced；When engine full speed, the noise on overhead guard at shutter (10) is down to 108dB or less.
2. the forklift steering room overhead guard according to claim 1 with noise-reducing structure, it is characterised in that: the upper spacer (13) the spacing between the roof in top margin and lower right frame beam (4) is 25mm.
3. the forklift steering room overhead guard according to claim 1 with noise-reducing structure, it is characterised in that: the lower clapboard (12) the spacing between the bottom wall in bottom edge and lower right frame beam (4) is 25mm.
4. the forklift steering room overhead guard according to claim 1 with noise-reducing structure, it is characterised in that: the stomata (18) diameter is 5~6mm.
5. the forklift steering room overhead guard according to claim 1 with noise-reducing structure, it is characterised in that: propped up behind the right side The area of air inlet (23) on leg (3) is that the area of the cross section of rear support leg (3) is suitable.
6. the forklift steering room overhead guard according to claim 1 with noise-reducing structure, it is characterised in that: right rear support leg (3) and lower right frame beam (4) connectivity part is equipped with throttling through-hole (22), and throttling through-hole (22) is located at the roof of lower right frame beam (4) On.
7. the forklift steering room overhead guard according to claim 6 with noise-reducing structure, it is characterised in that: the throttling is logical The diameter in hole (22) is 45~50mm, and the area of throttling through-hole (22) is the one third of the cross section of right rear support leg (3).
8. the forklift steering room overhead guard according to claim 1 or 2 with noise-reducing structure, it is characterised in that: described The volume of one expansion cavity (19) is 990~1010cm3, the volume of the second expansion cavity (20) is 540~560cm3, third expansion cavity (21) volume is 610~630cm3, the volume of resonant cavity (17) is 450~470 cm3。
9. the forklift steering room overhead guard according to claim 1 with noise-reducing structure, it is characterised in that: the shutter (10) it is equipped with the window leaf more than 8, the spacing between adjacent windows leaf is 15 mm.
CN201610689388.XA 2016-08-19 2016-08-19 Forklift steering room overhead guard with noise-reducing structure Active CN106150794B (en)

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Application Number Priority Date Filing Date Title
CN201610689388.XA CN106150794B (en) 2016-08-19 2016-08-19 Forklift steering room overhead guard with noise-reducing structure

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Application Number Priority Date Filing Date Title
CN201610689388.XA CN106150794B (en) 2016-08-19 2016-08-19 Forklift steering room overhead guard with noise-reducing structure

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114834383A (en) * 2022-04-21 2022-08-02 第一拖拉机股份有限公司 External falling object protection device for modular tractor

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Publication number Priority date Publication date Assignee Title
CN1572710A (en) * 2003-05-30 2005-02-02 三菱重工业株式会社 Air intake system and forklift equipped with it
CN203602326U (en) * 2013-11-22 2014-05-21 长沙湘普防爆车辆有限公司 Large-tonnage anti-explosion diesel fork lift truck
CN203683000U (en) * 2013-12-26 2014-07-02 安徽江淮银联重型工程机械有限公司 Improved structure of forklift overhead guard
CN104975924A (en) * 2015-07-31 2015-10-14 云南大红山管道有限公司 Widely-applied silencer
CN204848137U (en) * 2015-07-21 2015-12-09 合肥和安机械制造有限公司 Overhead guard assembly

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Publication number Priority date Publication date Assignee Title
JPH03125631A (en) * 1989-10-11 1991-05-29 Toyota Autom Loom Works Ltd Hydraulic fluid cooling device for forklift
JPH0687338A (en) * 1992-09-07 1994-03-29 Toyota Autom Loom Works Ltd Suction device for industrial vehicle
JP2004010231A (en) * 2002-06-05 2004-01-15 Komatsu Forklift Co Ltd Intake port of industrial vehicle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1572710A (en) * 2003-05-30 2005-02-02 三菱重工业株式会社 Air intake system and forklift equipped with it
CN203602326U (en) * 2013-11-22 2014-05-21 长沙湘普防爆车辆有限公司 Large-tonnage anti-explosion diesel fork lift truck
CN203683000U (en) * 2013-12-26 2014-07-02 安徽江淮银联重型工程机械有限公司 Improved structure of forklift overhead guard
CN204848137U (en) * 2015-07-21 2015-12-09 合肥和安机械制造有限公司 Overhead guard assembly
CN104975924A (en) * 2015-07-31 2015-10-14 云南大红山管道有限公司 Widely-applied silencer

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