SI21184A

SI21184A - Axially moving sprocket wheel of a forestry winch

Info

Publication number: SI21184A
Application number: SI200200202A
Authority: SI
Inventors: Franc Pišek
Original assignee: Vitli Krpan Proizvodnja Kmetijske In Gozdarske Mehanizacije
Priority date: 2002-08-26
Filing date: 2002-08-26
Publication date: 2003-10-31

Abstract

Typical of the axially moving sprocket wheel of a forestry winch is that the drum (3) with automatic brake (4) is attached to the main shaft (6), while the drum (3) for winding and unwinding wire rope is via a clutch (2) slidingly connected to the axially moving sprocket wheel (1). The sprocket wheel (1) is connected to the hydraulic cylinder (6) and in the moment, when the hydraulic cylinder receives the signal from the command handle in order to stop the drum (3) rotation, it releases the moving of the hydraulic cylinder (6) which shifts the sprocket wheel (1) away from the clutch (2).

Description

AKSIALNO POMIČEN VERIŽNIK GOZDARSKEGA VITLAAXIALLY MOVED CHAIN FORWARD

Izum se nanaša na mehanski sklop, ki omogoča aksialni odmik pogonskega verižnika od bobna za navijanje žične vrvi pri gozdarskem vitlu.The invention relates to a mechanical assembly that allows axial movement of the sprocket from the drum for winding a wire rope at a forestry winch.

Tehnični problem, ki ga pričujoči izum rešuje, je konstrukcijska rešitev mehanskega sklopa, ki bo aksialno odmaknil pogonski verižnik od bobna za navijanje in odvijanje žične vrvi v trenutku, ko ga ustavi avtomatska zavora.A technical problem to be solved by the present invention is a structural solution of a mechanical assembly that will axially move the drive sprocket away from the drum for winding and unwinding the wire rope as soon as it is stopped by an automatic brake.

Rešitev mora omogočati zanesljivo aktiviranje odmika v trenutku ustavitve žične vrvi in tako preprečiti neželeno drsenje in zažiganje sklopke.The solution must be able to reliably activate the offset when the wire rope is stopped, thus preventing unwanted slipping and firing of the clutch.

Poznana je rešitev z odmikom bobna za navijanje in odvijanje žične vrvi od pogonskega verižnika v aksialni smeri. Zaradi velike mase bobna z žično vrvjo se premikanje le-tega težje izvede, kar pomeni, da je sklopka nekaj časa preobremenjena. Rešitev je neprimerna tudi za delovanje skupaj z avtomatsko zavoro, saj se boben ne more pravočasno odmakniti v svojo izhodiščno lego, kar povzroči neželeno drsenje sklopke oziroma zažiganja sklopke.The known solution is to move the drum to wind and unwind the wire rope from the drive sprocket in the axial direction. Due to the large weight of the wire rope drum, its movement is more difficult, which means that the clutch is overloaded for some time. The solution is also unsuitable for operation in conjunction with the automatic brake, since the drum cannot move to its original position in a timely manner, which causes the clutch to slip or clutch to unwanted.

Bistvo aksialno pomičnega verižnika gozdarskega vitla po izumu je v tem, da je na glavno gred fiksno nameščen boben za navijanje in odvijanje žične vrvi z zavoro, ki je preko sklopke drsno povezan z aksialno pomičnim verižnikom, ki ga premakne hidravlični cilinder verižnika ob prejetem signalu komandne tipke.The point of the axial hoist chain of the forestry winch according to the invention is that on the main shaft is fixed a drum for winding and unwinding a wire rope with a brake, which is slidly connected to the axial movable chain via the clutch, which is moved by the hydraulic cylinder of the chainwheel when the command signal is received. keys.

Aksialno pomični verižnik gozdarskega vitla po izumu bo v nadaljevanju podrobneje opisan s pomočjo slike 1, ki kaže zgornji del glavne gredi 5 skupaj z zgornjim delom bobna 3, sklopke 2 in verižnika 1 z hidravličnim cilindrom 6 v prerezu.The axial movable chainring of the forestry winch of the invention will now be described in greater detail by means of Figure 1, which shows the upper part of the main shaft 5 together with the upper part of the drum 3, the clutch 2 and the chainring 1 with the hydraulic cylinder 6 in cross section.

Aksialno pomičen verižnik gozdarskega vitla je značilen po tem, da je na glavno gred 6 fiksno nameščen boben 3 z avtomatsko zavoro 4. Boben 3 za navijanje in odvijanje žične vrvi je preko sklopke 2 drsno povezan z aksialno pomičnim verižnikom 1, ki je povezan z hidravličnim cilindrom 6. V prostem teku je sklopka 2 odmaknjena od verižnika 1, kar pomeni, da boben 3 miruje. V trenutku, ko prejme hidravlični cilinder 6 signal za start premakne verižnik 1 proti sklopki 2, ki prenese gibanje na boben 3 in se žična vrv začne navijati na boben 3. V trenutku, ko prejme hidravlični cilinder 6 signal iz komandne ročke, da ustavi vrtljaje bobna 3, se sproži gibanje hidravličnega cilindra 6, ki zaradi povezave odmakne verižnik 1 od sklopke 2. Na ta način je omogočeno hitro odmikanje verižnika 1 od sklopke 2 z bobnom 3. Verižnik 1 se lahko aksialno giblje po glavni gredi 5 od 1 do 5 mm, kar je odvisno od konstrukcije samih delov hidravličnega cilindra 6 in verižnika 1.The axially movable chainring of the forestry winch is characterized by the fact that a drum 3 is mounted on the main shaft 6 with an automatic brake 4. The wire 3 for winding and unwinding the wire rope is slidably connected to the axially movable chain 1 by a clutch 2 which is connected to the hydraulic cylinder 6. In idle, clutch 2 is offset from sprocket 1, which means drum 3 is stationary. The moment the hydraulic cylinder 6 receives the start signal moves the sprocket 1 towards the clutch 2, which transmits movement to the drum 3 and the wire rope begins to wind on the drum 3. The moment the hydraulic cylinder 6 receives a signal from the control lever to stop rotation of drum 3, the movement of hydraulic cylinder 6 is triggered which, due to the connection, moves the sprocket 1 away from the clutch 2. This allows the sprocket 1 to be quickly moved away from the clutch 2 with the drum 3. The sprocket 1 can move axially through the main shaft 5 from 1 to 5. mm, which depends on the construction of the hydraulic cylinder 6 itself and the sprocket 1.

Z aksialno pomičnim verižnikom gozdarskega vitla je rešen problem prepočasnega odmika bobna 3 od verižnika 1 preko sklopke 2, kar ima za posledico daljšo življensko dobo sklopke 2 in boljši izkoristek avtomatske zavore 4.The axial swivel of the winch winch solves the problem of slowing the drum 3 away from the sprocket 1 through the clutch 2, resulting in a longer clutch life 2 and better automatic brake utilization 4.

Claims

Axially movable forestry winch sprocket, characterized in that a drum (3) is fixed to the main shaft (6) with an automatic brake (4), so that the drum (3) is threadedly connected to the wire and winding wire rope (2) with an axial movable sprocket (1) connected to a hydraulic cylinder (6); that at the moment when the hydraulic cylinder (6) receives a signal from the control lever to stop the drum rotation (3), the movement of the hydraulic cylinder (6), which moves the sprocket (1) from the clutch (2), is triggered.