CN105416426A - Tensioning device for excavator crawler belt - Google Patents

Tensioning device for excavator crawler belt Download PDF

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Publication number
CN105416426A
CN105416426A CN201510881954.2A CN201510881954A CN105416426A CN 105416426 A CN105416426 A CN 105416426A CN 201510881954 A CN201510881954 A CN 201510881954A CN 105416426 A CN105416426 A CN 105416426A
Authority
CN
China
Prior art keywords
spring
crawler
excavator
shaft
tightening
Prior art date
Application number
CN201510881954.2A
Other languages
Chinese (zh)
Inventor
王亦清
Original Assignee
天津市中机雄风机械有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 天津市中机雄风机械有限公司 filed Critical 天津市中机雄风机械有限公司
Priority to CN201510881954.2A priority Critical patent/CN105416426A/en
Publication of CN105416426A publication Critical patent/CN105416426A/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B62LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62DMOTOR VEHICLES; TRAILERS
    • B62D55/00Endless track vehicles
    • B62D55/08Endless track units; Parts thereof
    • B62D55/30Track-tensioning means

Abstract

The invention provides a tensioning device for an excavator crawler belt. The tensioning device comprises a buffer mechanism and a cylinder assembly. The buffer mechanism comprises a compression spring, a spring shaft, a guide sleeve and a locking ring. The compression spring surrounds the spring shaft. The guide sleeve wraps the compression spring and guides the compression spring to stretch out and draw back. An annular groove is formed in one end of the spring shaft. The locking ring is arranged in the annular groove in a sliding manner. A spring pressing plate is arranged between the locking ring and the compression spring. A spring seat is arranged at the other end of the spring shaft. The compression spring is located between the spring seat and the spring pressing plate. The cylinder assembly comprises a tensioning rod, a hydraulic cylinder, a piston and an end cover. The tensioning rod is fixedly connected with the hydraulic cylinder through the end cover. The hydraulic cylinder is in sliding connection with the spring seat. The piston is fixedly connected with one end of the spring shaft. A closed oil cavity is defined by the hydraulic cylinder, the piston and the end cover jointly. The tensioning device has the beneficial effects that the structure is compact, demounting is facilitated, tensioning force is adjusted conveniently, flexibility is high, the buffer effect is good, and normal work of the crawler belt can be guaranteed well.

Description

A kind of crawler of excavator tightening device

Technical field

The present invention relates to a kind of tightening device, be specifically related to a kind of crawler of excavator tightening device.

Background technology

When shovel crawler is in the process of walking owing to being subject to the impact of ground complex road condition and causing turning forward being subject to larger digging force, the stressed retraction in crawler belt front end, for ensureing that crawler of excavator running gear can normally work, keep suitable degree of tension, reduce impact load when walking and extra consumption of power, guarantee that crawler belt can not rupture because of impact or the faults such as derailing occur in the walking process of vehicle, every bar crawler belt is all provided with tightening device.

Track takeup has multiple, such as hydraulic tension, spring loaded tensioning, screw tensioning and leading screw tensioning, for leading screw track takeup, after making crawler tensioning at certain position, by nut, leading screw is locked, and after crawler belt is lax because of road condition change generation, can not automatically adjust in time.Current widespread use be hydraulic tension device with recoil spring, wherein apply predetermined tensile force by tensioning hydro-cylinder to guide wheel, recoil spring is set on the expansion link that is connected with tensioning hydro-cylinder usually.The predetermincd tension of track takeup and the buffering capacity of spring have a great impact crawler travel performance tool, predetermincd tension is excessive, then track rigidity is too large, tightening device does not have buffer action, the increase of crawler running machinery internal friction can be caused simultaneously, thus cause the loss of engine power and accelerate the crawler belt rate of wear; Predetermincd tension is too little can make slack of track again, does not have tension, to cause above crawler belt vibration simultaneously and beats.

The tensile force of tightening device of the prior art mostly adjusts trouble or controlled variable is less, and be subject to not provide certain freedom of motion for Athey wheel compared with during noticeable effort at crawler belt, the flexibility ratio of production is poor.In addition, oiling and a mostly shared valve of draining the oil on the housing assembly of existing track takeup, when housing assembly internal pressure is higher, valve can be rushed out, and has potential safety hazard.Operationally, when chassis is subject to excessive impulsive force, the distortion of tensioning hydro-cylinder cylinder barrel and sealing member damage can be there is, also oil cylinder leakage of oil situation can be caused, tensile force cannot be ensured, and crawler belt is in tensioning state always, cause slack of track, and then produce crawler belt and the fault such as track frame interference wear or derailed crawler belt.

Summary of the invention

Object of the present invention is intended to overcome problems of the prior art, provides a kind of by spring pre-tightening and by the crawler of excavator tightening device of hydraulic actuating cylinder tensioning.Crawler of excavator tensioning device structure according to the present invention is compact, manufacturing cost and maintenance cost low, the flexibility ratio of production is high, and wire diameter is little, good buffer effect, and well can ensure the normal work of crawler belt.

The present invention is realized by following technical scheme:

A kind of crawler of excavator tightening device, comprise buffer gear and housing assembly, one end of described housing assembly is connected with the one end fits of buffer gear, its outstanding technical characteristic is: described buffer gear comprises Compress Spring, spring shaft, orienting sleeve and locking ring, described Compress Spring is centered around on described spring shaft, described orienting sleeve surrounds described Compress Spring and guides Compress Spring to stretch, one end of described spring shaft is provided with circular groove, and circular groove is positioned at guide wheel side, described locking ring is slidably arranged in circular groove, also spring bearer plate is provided with between described locking ring and Compress Spring, the other end of described spring shaft is provided with spring perch, described Compress Spring is between spring perch and spring bearer plate.Described housing assembly comprises nutted rod, hydraulic actuating cylinder, piston and end cap, described nutted rod is fixedly connected with hydraulic actuating cylinder by end cap, and nutted rod is positioned at driven wheel side, described hydraulic actuating cylinder and spring perch sliding block joint, described piston and spring shaft one end are connected to a fixed, and described hydraulic actuating cylinder, piston and end cap are encircled a city a closed oil pocket jointly.

Preferably, the side of described spring bearer plate has internal bore groove, and it can combine with the surface of described locking ring.

Preferably, the internal diameter of described orienting sleeve is greater than 1-2 millimeter than the external diameter of described Compress Spring.

Preferably, described spring perch is fixed on the shaft shoulder position of described spring shaft by nut.

Preferably, be provided with support ring, back-up ring and seal ring between described hydraulic actuating cylinder and piston, described support ring is arranged at seal ring inside front ends, and described back-up ring is close to outside seal ring.

Preferably, described housing assembly also comprises fuel feeding valve and oil cock, and described fuel feeding valve is all connected with oil pocket with oil cock.

Preferably, described fuel feeding valve and oil cock are bolted on hydraulic actuating cylinder.

The present invention has following beneficial effect:

1. namely crawler of excavator tightening device of the present invention regulates by filling, draining the oil many tensile forces, and also can be regulated tensile force by regulating spring axle and locking ring, easy to adjust, time saving and energy saving, flexibility ratio is high.

2. the present invention has encirclement Compress Spring and the orienting sleeve guiding Compress Spring flexible in Compress Spring outer setting, and have compact conformation, be convenient to dismounting, wire diameter is little, good buffer effect, can be good at the advantage of the normal work ensureing crawler belt.

3. the present invention is provided with separate fuel feeding valve and oil cock, can the safety of actv. assurance device when housing assembly internal pressure is higher.Meanwhile, the design of support ring of the present invention and back-up ring, not only can increase the stability of hydraulic actuating cylinder, can also strengthen seal ring, reduces the probability that seal ring damages, and then reduces the possibility of leakage of oil, increases the service life of tightening device.

Accompanying drawing explanation

Fig. 1 is structural representation of the present invention.

In figure: 1-buffer gear; 2-housing assembly;

11-Compress Spring; 12-spring shaft; 13-orienting sleeve; 14-locking ring; 15-circular groove; 16-spring bearer plate; 17-spring perch; 18-nut; 21-nutted rod; 22-hydraulic actuating cylinder; 23-piston; 24-end cap; 25-oil pocket; 26-support ring; 27-back-up ring; 28-seal ring; 29-fuel feeding valve; 20-oil cock.

Detailed description of the invention

As shown in Figure 1, the invention provides a kind of crawler of excavator tightening device, comprise buffer gear 1 and housing assembly 2, one end of housing assembly 2 is connected with the one end fits of buffer gear 1.Buffer gear 1 comprises Compress Spring 11, spring shaft 12, orienting sleeve 13 and locking ring 14, Compress Spring 11 is centered around on spring shaft 12, orienting sleeve 13 surrounds Compress Spring 11 and guides Compress Spring 11 to stretch, the internal diameter of orienting sleeve 13 is greater than 1-2 millimeter than the external diameter of described Compress Spring 11, thus makes Compress Spring 11 can be freely flexible in orienting sleeve 13.One end of spring shaft 12 is provided with circular groove 15, and circular groove 15 is positioned at guide wheel side, and locking ring 14 is slidably arranged in circular groove 15, is also provided with spring bearer plate 16 between locking ring 14 and Compress Spring 11.Described circular groove 15 is for holding locking ring 14 slidably, locking ring 14 can be used for again the Compress Spring 11 keep-spring pressing plate 16 of slip to remain on spring shaft 12, the side of spring bearer plate 16 has internal bore groove, it can combine with the surface of locking ring 14, and locking ring 14 is in the position of the shaft shoulder of circular groove 15 end.The other end of spring shaft 12 is provided with spring perch 17, spring perch 17 is fixed on the shaft shoulder position of the other end of spring shaft 12 by nut 18, one end that Compress Spring 11 is relative with spring bearer plate 16 remains on spring shaft 12 by spring perch 17, and Compress Spring 11 can be preloaded between spring perch 17 and spring bearer plate 16.

Housing assembly 2 comprises nutted rod 21, hydraulic actuating cylinder 22, piston 23 and end cap 24, described nutted rod 21 is fixedly connected with hydraulic actuating cylinder 22 by end cap 24, and nutted rod 21 is positioned at driven wheel side, described hydraulic actuating cylinder 22 and spring perch 17 sliding block joint, described piston 23 is connected to a fixed with spring shaft 12 one end, described hydraulic actuating cylinder 22, piston 23 and end cap 24 oil pocket 25 that one, besieged city is closed jointly.Be provided with support ring 26, back-up ring 27 and seal ring 28 between described hydraulic actuating cylinder 22 and piston 23, support ring 26 is arranged at seal ring 28 inside front ends, and back-up ring 27 is close to outside seal ring 28.Housing assembly 2 also comprises fuel feeding valve 29 and oil cock 20, and fuel feeding valve 29 is all connected with oil pocket 25 with oil cock 20, and fuel feeding valve 29 and oil cock 20 are bolted on hydraulic actuating cylinder 22.

When needing tensioned tracks in excavating machine walking process, only need by fuel feeding valve 29 to oiling in the oil pocket 25 closed, oiling supercharging, hydraulic actuating cylinder 22 slides left and makes crawler tensioning by nutted rod 21 and tension wheel (not shown), if crawler belt tension, drain the oil can make slack of track by oil cock 20, time saving and energy saving.When making tension wheel be subject to impacting when running into obstacle during excavating machine travels; due to the incompressibility of liquid; impulsive force passes on Compress Spring 11 by nutted rod 21, piston 23, spring shaft 12 and spring perch 17; under the effect of orienting sleeve 13 and locking ring 14, can prevent Compress Spring from beating, position is indefinite; thus Compress Spring 11 is stretched freely; move after tension wheel, and then fender guard is not damaged, guarantees normal traveling or the operation of excavating machine.

Above embodiments of the invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.

Claims (7)

1. a crawler of excavator tightening device, comprise buffer gear and housing assembly, one end of described housing assembly is connected with the one end fits of buffer gear, it is characterized in that: described buffer gear comprises Compress Spring, spring shaft, orienting sleeve and locking ring, described Compress Spring is centered around on described spring shaft, described orienting sleeve surrounds described Compress Spring and guides Compress Spring to stretch, one end of described spring shaft is provided with circular groove, and circular groove is positioned at guide wheel side, described locking ring is slidably arranged in circular groove, also spring bearer plate is provided with between described locking ring and Compress Spring, the other end of described spring shaft is provided with spring perch, described Compress Spring is between spring perch and spring bearer plate,
Described housing assembly comprises nutted rod, hydraulic actuating cylinder, piston and end cap, described nutted rod is fixedly connected with hydraulic actuating cylinder by end cap, and nutted rod is positioned at driven wheel side, described hydraulic actuating cylinder and spring perch sliding block joint, described piston and spring shaft one end are connected to a fixed, and described hydraulic actuating cylinder, piston and end cap are encircled a city a closed oil pocket jointly.
2. a kind of crawler of excavator tightening device according to claim 1, is characterized in that: the side of described spring bearer plate has internal bore groove, and it can combine with the surface of described locking ring.
3. a kind of crawler of excavator tightening device according to claim 1, is characterized in that: the internal diameter of described orienting sleeve is greater than 1-2 millimeter than the external diameter of described Compress Spring.
4. a kind of crawler of excavator tightening device according to claim 1, is characterized in that: described spring perch is fixed on the shaft shoulder position of described spring shaft by nut.
5. a kind of crawler of excavator tightening device according to claim 1, it is characterized in that: be provided with support ring, back-up ring and seal ring between described hydraulic actuating cylinder and piston, described support ring is arranged at seal ring inside front ends, and described back-up ring is close to outside seal ring.
6. a kind of crawler of excavator tightening device according to claim 1, it is characterized in that: described housing assembly also comprises fuel feeding valve and oil cock, described fuel feeding valve is all connected with oil pocket with oil cock.
7. a kind of crawler of excavator tightening device according to claim 6, is characterized in that: described fuel feeding valve and oil cock are bolted on hydraulic actuating cylinder.
CN201510881954.2A 2015-12-03 2015-12-03 Tensioning device for excavator crawler belt CN105416426A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510881954.2A CN105416426A (en) 2015-12-03 2015-12-03 Tensioning device for excavator crawler belt

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510881954.2A CN105416426A (en) 2015-12-03 2015-12-03 Tensioning device for excavator crawler belt

Publications (1)

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CN105416426A true CN105416426A (en) 2016-03-23

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106945737A (en) * 2017-03-16 2017-07-14 国机重工(常州)挖掘机有限公司 Caterpillar system automatic tension device

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57194169A (en) * 1981-05-23 1982-11-29 Hitachi Constr Mach Co Ltd Track take-up unit in caterpillar vehicle
JPS58116275A (en) * 1981-12-29 1983-07-11 Hitachi Constr Mach Co Ltd Hydraulic cylinder for crawler tension unit
CN102015425A (en) * 2008-05-05 2011-04-13 克拉克设备公司 Modular track tensioning system
CN104527827A (en) * 2014-12-31 2015-04-22 中联重机股份有限公司 Caterpillar band tensioning device for track vehicle and track vehicle
CN204472942U (en) * 2014-12-29 2015-07-15 江阴市长龄机械制造有限公司 Track takeup

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57194169A (en) * 1981-05-23 1982-11-29 Hitachi Constr Mach Co Ltd Track take-up unit in caterpillar vehicle
JPS58116275A (en) * 1981-12-29 1983-07-11 Hitachi Constr Mach Co Ltd Hydraulic cylinder for crawler tension unit
CN102015425A (en) * 2008-05-05 2011-04-13 克拉克设备公司 Modular track tensioning system
CN204472942U (en) * 2014-12-29 2015-07-15 江阴市长龄机械制造有限公司 Track takeup
CN104527827A (en) * 2014-12-31 2015-04-22 中联重机股份有限公司 Caterpillar band tensioning device for track vehicle and track vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106945737A (en) * 2017-03-16 2017-07-14 国机重工(常州)挖掘机有限公司 Caterpillar system automatic tension device

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Application publication date: 20160323