CN201254223Y - Track with liquid lubrication sealing device - Google Patents

Abstract

The utility model relates to the technical field of crawler engineering mechanical devices and in particular relates to a pedrail equipped with a liquid lubricating and sealing device. The pedrail comprises a pedrail member provided with a counter hole, a sealing device, a rotating part of the pedrail, a pedrail chain link, a pedrail connecting chain link, a pedrail plate, a connecting piece of the pedrail plate, a pedrail plate fastening screw cap-bolt, a pin roll and a pin bush. The liquid sealing device consists of a thrust washer arranged in the counter hole, an irregular elastic rubber ring and a combined gasket ring axially superposed with the irregular elastic rubber ring. The combined gasket ring is sealed with the head face of the pin bush. Sealing pieces are arranged at two ends of the screw thread in a hole of the pedrail plate fastening bolt. The pedrail plate is screwed in a hole of a pedrail chain link fastening bolt through the fastening bolt and is tightly fastened with the pedrail chain link. The pedrail has the beneficial effects that the pedrail realizes liquid lubrication of a pedrail with the pitch at 190mm or below, and the pedrail has broad application prospect.

Description

Be provided with the crawler belt of liquid lubrication sealing arrangement

Technical field

The utility model belongs to the tracked construction equipment equipment technical field, particularly a kind of crawler belt that is provided with the liquid lubrication sealing arrangement.

Background technology

In disclosed CN 1721718 A of Chinese patent and CN 1980828A crawler belt sealing arrangement, the sealing member quantity in the track link counterbore is three to four, and radially is arranged in order.For example, for 190mm pitch crawler belt, the monolateral radial dimension of guide side seal face is greatly about about 8.4mm, to in the plane of 8.4mm radially, be arranged in order three sealing members, guaranteeing the elastic caoutchouc circle, under the prerequisite of seal ring intensity, then leave the not enough 1mm of monolateral radial dimension of thrust washer for, as the sealing member quantity that is arranged in order in the plane of 8.4mm radially is four, thrust washer has not selected the leeway of folding, therefore, there is undercapacity in thrust washer, and to dwindle this deficiency gradually just outstanding all the more along with pitch, and then the existing property of certain office is arranged on using, make the lubricated crawler belt of existing 190mm and following pitch still locate blank.

In addition, the linkage section of track link is less than interlude with the area of contact (longitudinal and transverse slit is arranged in the middle of the linkage section of two chain links) of caterpillar wheel, it weares and teares also greater than interlude, and then causes the working face of guide rail of track link rough and uneven in surface (being that height in the middle of each track link working face of guide rail, two are low).Caterpillar wheel travels and winnowed with a dustpan in the periodic mountain peak up and down of vehicle generation, the mutual impact wear aggravation of the working face of guide rail of track link and caterpillar wheel, influence to caterpillar wheel is particularly serious, make its axially, diameter clearance increase and leakage of oil.

Moreover, the outer cubic fastening nut steady job trench bottom of track link is the plane, in order to prevent work nest bottom and dual-side on turn stress concentration, increased a fillet of dodging, cause the diagonal line of the width of chain link steady job groove greater than outer cubic nut, after contaminated caterpillar block binding bolt exposed the screw thread corrosion, nut was with bolt rotation work groove solid failure during dismounting, and being forced to adopt the method for flame cut to decompose, binding bolt has become disposable products.

For this reason, at the late nineteen seventies in last century, U.S. US4083611, US4050750 patent just place the caterpillar block fastening nut mode that adopts blind hole in the crawler belt connecting link, back CN1522921A has similar disclosing of the same clan again, but a kind of worry of people is left in this design for, the erosion of the unavoidable contaminated thing of port open state of blind hole, a large amount of caterpillar block fastening nuts is placed in the track link, unavoidable binding bolt and the corrosion of chain link negative thread, so that twist off bolt even cause chain link to scrap, also have the deficiency of blind hole internal thread processing technology complexity simultaneously.

In addition, existing split type crawler belt connecting link divides body interface incision line wide-angle, the cutting of longitudinal degree, make the tangent plane driving surface and the angle a between chain link two bottom surfaces that connect the tooth place bigger than normal, between 30 °-45 °, it is on the low side between two parties to connect tooth driving surface first stress point, shearing to tie bolt, the component of the flank of tooth all increases, divide dignity not have the assembling benchmark, whether two connecting links divide dignity in a plane about be difficult to detecting, is the existing common practice and utilize two bottom surfaces (being that working face of guide rail is connected driving surface with chain link with caterpillar block) as the assembling benchmark, when being benchmark with the working face of guide rail, assemble once more behind its wearing and tearing or the repair welding and will lose reference plane, two connecting link branch dignity are not in a plane about causing, connect the back set up stresses, serious is just broken at short notice, and on-the-spot being difficult to keeped in repair, brought hidden danger to product design, because abandoning of not having by force of practicality produced.

Moreover, the branch body interface of split type crawler belt connecting link, initial and end two stress points are in the projected length deficiency of horizontal surface, being so limited split type connecting link caterpillar block two fastening screw keyhole width between centerss is forced to further, inequality with the caterpillar block fastening screw keyhole of same model integral type chain link, lost and exchanged and unification; Divide body interface assembling and detection reference deficiency and the connection number of teeth few, reduced the assembly precision and the Joint strenght of split type chain link.

In addition, in the entire track chain link connects, the existing thin connection mode instability in the bearing pin diameter of axle two pluckings centres that connects, wherein a kind ofly be: bearing pin cooperates with the chain-link pin interporal lacuna, the cooperation of this structure because of become gradually greatly by the impact load gap, changes the interaxle width between centers of track pin soon; Another kind is: the connection mode that bearing pin and chain link pin-and-hole interference fit, the cooperation of this structure still adopt artificial sledgehammer to hit bearing pin, it is not in place or the magnitude of interference is little and bearing pin is scurried out easily to produce assembling.Meet this situation, the user welds between bearing pin and pin-and-hole, adopts flame cut again when maintenance is decomposed, and the junction of integral type chain link has become potential safety hazard after a lot of bother.

Summary of the invention

The purpose of this utility model provides a kind of crawler belt that is provided with the liquid lubrication sealing arrangement, comprises the attaching parts of later-model liquid sealing device, caterpillar block, crawler belt connecting link, caterpillar block.

The purpose of this utility model is achieved through the following technical solutions:

According to the crawler belt that is provided with the liquid lubrication sealing arrangement of the present utility model, comprise the crawler belt member that is provided with counterbore, be located at the sealing arrangement in the counterbore, the rotatable parts of crawler belt, track link, the crawler belt connecting link, caterpillar block, the attaching parts of caterpillar block, caterpillar block fastening nut-bolt, bearing pin and guide is characterized in that described liquid sealing device is by a thrust washer that is located in the described counterbore, special-shaped elastic caoutchouc circle connecing of a thrust washer radially adjoining and special-shaped therewith elastic caoutchouc circle combined seal ring doing axially stack is formed therewith, and the end face formation of this combined seal ring and described guide seals.Screw thread two ends in described track link in the caterpillar block binding bolt hole are provided with sealing member, contact the sealing at realization bolt hole negative thread two ends when the sealing member at described screw thread two ends screws in screw thread in the track link fastening screw keyhole by the caterpillar block binding bolt with described sealing member, and tighten together with track link.So far, the liquid lubrication formula crawler belt that links together and form ring-type by split type axle head chain link and cover end chain link (or entire track connecting link) of the in-line crawler belt after the assembling.

That the both ends of the surface of described thrust washer respectively have is wide, be 1-3mm deeply, 120 ° straight line lubrication groove at interval, and outer surface roughness Ra value is 0.4.

The inside face of described special-shaped elastic caoutchouc circle has axial lubrication at least one, and the cross-sectional plane of this special-shaped elastic caoutchouc circle is an eight shape.

Described combined seal ring is provided with and the corresponding eight shape cavity of special-shaped elastic caoutchouc circle cross-sectional plane, adopt rubber or polyurethane that seal ring and dust ring are combined, at least be provided with one sealing lip on this combined seal ring, at least dust excluder lips in being provided with together on this dust ring, one outer dust excluder lips, the outside dimension of interior dustproof lip is greater than the outside dimension of the sealing surface that cooperates with seal ring, and contact with the outer lead angle of the sealing surface that cooperates, outer dust excluder lips contacts with the counterbore sidewall, and between interior dust excluder lips and sealing lip, establish a U type or a circular arc type that prevents that interference mutually is recessed and reconcile groove, this degree of depth of reconciling groove is 1-5mm, width is 0.5-3mm, and the angle of horizontal surface is between 0 °-90 °.

Reconcile at the eight shape cavity inside face of described combined seal ring and U type or circular arc type and to be provided with one between the groove and to open seam.

The side thickening 0-10mm of described track link, when the chain link working face of guide rail makes progress horizontal positioned, be provided with depressed part from track link interlude working face of guide rail and interlude driving surface intersection, side, or it is vertically middle at chain link interlude driving surface, at least have U type groove downwards one perpendicular to the chain link working face of guide rail, described depressed part be located at track link medial surface, track link lateral surface or be located at the inside and outside side of track link simultaneously.

Described caterpillar block fastening nut can be a non-cylindrical or cylindrical, when described caterpillar block fastening nut is non-cylindrical, track link adopts and the corresponding steady job groove of non-cylindrical fastening nut, this steady job groove is for to be symmetrical structure about bolt hole center's line, this steady job well width is greater than non-cylindrical fastening nut diameter 2-8mm, this steady job trench bottom driving surface is parallel with the chain link bottom surface, parallel with chain link two ends pin-and-hole, the radius of knuckle is less than the radius of non-cylindrical fastening nut between the dual-side of this steady job groove and the bottom driving surface, the width of non-cylindrical nut plane driving surface is less than work nest bottom face width, the work nest top is an arch, the fastening nut both ends of the surface are parallel with the tapped bore line of centers, equidistantly or not equidistant, the tapped bore of fastening nut adopts blind hole.

When described caterpillar block fastening nut when being cylindrical, track link adopts and the corresponding steady job groove of cylindrical fastening nut, this steady job groove is the circular symmetric structure work nest, the diameter of this circular symmetric structure work nest is greater than the diameter 2-8mm of cylindrical fastening nut, the bottom driving surface of circular symmetric structure work nest and the bottom surface of chain link are parallel surfaces, with chain link two ends pin-and-hole be parallel hole, this circular symmetric structure work nest line of centers and chain link binding bolt centerline hole radial tolerance are 0.20mm, the position of the circular symmetric structure work nest of this fastening nut is parallel with chain link two ends pin-and-hole line of centers between two bottom surfaces, the fastening nut both ends of the surface are parallel with the tapped bore line of centers, fastening nut both ends of the surface and tapped bore line of centers equidistantly or not equidistant, the tapped bore of fastening nut adopts blind hole.

The screw thread two ends of described track link in caterpillar block fastening screw keyhole are provided with sealing member, the head end of fastening screw keyhole is provided with a stepped hole that is lower than end face at the screw terminal of caterpillar block binding bolt and the coaxial place of centerline hole, place sealing member elastic caoutchouc circle at this stepped hole, end at caterpillar block fastening screw keyhole negative thread is the smooth outer surface that is used to place sealing member, described caterpillar block fastener contacts with described sealing member by the screw thread in the caterpillar block binding bolt screw-in track link fastening screw keyhole and realizes that screw thread is sealed at both ends, and caterpillar block and track link are tightened together.Wherein, track link is provided with two lightening holes above caterpillar block fastening screw keyhole, and this lightening hole is the standby hole of placing the cylindrical fastening nut of caterpillar block, is again the sealing member encapsulated holes that is used to protect track link fastening screw keyhole negative thread.

Described split type crawler belt connecting link comprises first and second portion, this first has the auxiliary connection of upper strata tooth surface, the tooth master of lower floor connects the surface, connect the surface this master and be respectively equipped with at least one first connection tooth on the surface with auxiliary the connection, this second portion has with first corresponding upper strata tooth is auxiliary and is connected surperficial, the tooth master of lower floor and connects the surface, connect the surface this master and be respectively equipped with at least one second connection tooth on the surface with auxiliary the connection, this second connection tooth is connected indented joint with corresponding first.

Described crawler belt connecting link can be split type or integral type, when described crawler belt connecting link is split type, the connection tooth driving surface of this split type crawler belt connecting link is double-deck, it is between M-N between the line N point of bottom surface that upper bottom surface M point is adopted on the upper strata, increase one or more pulling force teeth, lower floor adopts straight line lengthening driving surface E-F, the multiple tooth low-angle structure of N-W, straight line lengthening driving surface is the assembling benchmark, axle head chain link and cover end chain link divide combination on the dignity at double-deck tooth, and make this kind chain link fastening screw keyhole identical with same model integral type chain link fastening screw keyhole.

The extended line of the upper and lower two-layer connection addendum face of described split type crawler belt connecting link is parallel or crossing, and plane, addendum face place is a dynamically changeable with respect to the angle α of chain link two bottom surfaces, and this α angle is between 0 °≤α≤29 °.

The tooth profile angle β of the connection tooth driving surface upper pulling force tooth of described split type crawler belt connecting link is a dynamically changeable, wherein the β angle in ° scope of 60 °＜β＜100,

Incision line between the end of the connection tooth driving surface upper strata tooth of described split type crawler belt connecting link and the initiating terminal of lower floor's tooth is a dynamically changeable with respect to the angle theta between chain link two bottom surfaces, this θ angle is between-90 °＜θ＜90 °, and the initial point of incision line can be in any one side of chain link two bottom surfaces.

The connection tooth driving surface of described split type crawler belt connecting link is double-deck, has one can make axle head chain link and cover end chain link move to make along the line vertical direction easy on and off of two centerline holes to be connected tooth and to realize combination and the hollow groove that separates between described M-N.

When described crawler belt connecting link is the entire track connecting link, this integral type connecting link comprises: the axle head endoporus and the cover end endoporus that are used for connecting link, expansion slot, wait upon the clothes tapped bore, the inwall definite length extended of at least one in described axle head endoporus and cover end endoporus of this expansion slot, but be used for the integral type connecting link is divided into the first and the second portion of relative displacement, this is waitd upon the clothes tapped bore and is located in the chain link of the middle first of two fastening screw keyholes, be screwed in the tapped bore of first and promote second portion two parts are separated by waiing upon the clothes bolt, make the enlarged-diameter at least one hole in described axle head endoporus and the cover end endoporus, and be beneficial to described axle shape spare is inserted described axle head endoporus and overlaps at least one of holding in the endoporus, make things convenient for installation shaft shape spare at least one in described axle head endoporus and cover end endoporus thus, thus unload wait upon the clothes bolt after, tighten the caterpillar block binding bolt axle shape spare be fixed in described axle head endoporus and the cover end endoporus at least one.

Described integral type connecting link ended from the axle head inner hole wall beginning to cover end inner hole wall 10-50mm, or begin only to open an expansion slot to axle head inner hole wall 10-50mm from chain link cover end inner hole wall, the terminal point of expansion slot has finishing, and the two ends of finishing are provided with and stop the hole

Described expansion slot and finishing are the combination of straight line, curve or straight line and curve, described expansion slot is located on the line at center, two holes or in a side of the line of centres, the width of described expansion slot is 0.12mm-0.5mm, the upside of described expansion slot is provided with two steady job grooves that are used to install circular clamp nut

The caterpillar block fastening screw keyhole and the expansion slot upside of described entire track connecting link is provided with two steady job grooves that are used to install circular clamp nut and communicates, and makes the two through hole vertical and intersectant centerline,

The rubber seal of protection screw thread is installed in the steady job groove of described circular clamp nut,

Described integral type connecting link is provided with a spill seal groove along the circumferential surface of bearing pin endoporus, in order to 0 RunddichtringO to be installed, bottom and bearing pin endoporus coaxial direction at groove are provided with a manhole at least on expansion slot, in order to rubber strip to be installed, transitional slot less than the manhole diameter is set between manhole and bearing pin endoporus circumferential surface, spill seal groove and manhole intersect, one end face of manhole inner seal liner contacts with the bottom face of special-shaped elastic caoutchouc circle, the sealing member elastic caoutchouc circle outside in other end side and the groove contacts, elastic caoutchouc circle medial surface contacts with the outside face of bearing pin in the pin-and-hole and forms sealing

Described integral type connecting link is provided with the seal groove of the installation cone elastic rubber strip sealing member of a transitional slot along the circumferential surperficial overexpansion groove of bearing pin endoporus, one end of this cone elastic rubber strip sealing member contacts with the bottom face of described special-shaped elastic caoutchouc circle, and the inner surface of sealing member contacts with the outside face of bearing pin and forms sealing.

The beneficial effects of the utility model: sealing arrangement and the stack of CN101020475A have before broken through the prior art bottleneck, have realized the liquid lubrication of 190mm and following pitch crawler belt.The change of utilization of track link new departure and connecting link connection mode makes product have more science, competitiveness, with practicality, and concentrates and to show as: joint money, material-saving, energy-saving and environmental protection have important practical value and an application prospects multi-field.

Description of drawings

Fig. 1 is the structural representation that is provided with the track link of sealed liquid lubricator of the present utility model.

Fig. 2 is the structure enlarged diagram of sealing arrangement among Fig. 1.

Fig. 3 is the utility model track link working face of guide rail structural representation.

Fig. 4 is the utility model fastening nut structural representation.

Fig. 5 is the utility model track link fastening nut steady job groove structural representation.

Fig. 6 is the utility model and existing split type connecting link structural representation.

Fig. 7 hides the double-deck toothed chain joint structural representation that connects of formula for split.，

Fig. 8 is an entire track connecting link expansion slot structural representation.

Fig. 9 is an entire track connecting link curve expansion slot structural representation.

Figure 10 is an entire track connecting link expansion slot schematic diagram of sealing device.

The specific embodiment

Further specify the specific embodiment of the present utility model below in conjunction with accompanying drawing.

Referring to accompanying drawing 1,2,5, the crawler belt of employing liquid lubrication sealing arrangement of the present utility model, comprise the crawler belt member 7 that is provided with counterbore, the rotatable parts 6 of crawler belt, track link 108,148,149, crawler belt connecting link 49,60, caterpillar block 56, caterpillar block binding bolt 52,61 and caterpillar block clamp nut 112,1142,146, between the outer link 7 of crawler belt and guide 6, carry out the leak free sealing arrangement, it is characterized in that liquid sealing device in the counterbore 4 of described crawler belt member is by a thrust washer 124, special-shaped elastic caoutchouc circle 125 connecing of thrust washer 124 radially adjoinings and special-shaped therewith elastic caoutchouc circle 125 combined seal ring 118 doing axially stack is formed therewith, and the end face of this combined seal ring 118 and guide 6 forms and seals.Thrust washer 124 is used for spaced apart outer link 7 and guide 6, and the screw thread two ends in the fastening screw keyhole of caterpillar block are provided with sealing member, and caterpillar block screws in track link fastening screw keyhole by binding bolt and track link tightens together.

That the both ends of the surface of described thrust washer 124 respectively have is wide, be 1-3mm deeply, 120 ° straight line lubrication groove at interval, and outer surface roughness Ra value is 0.4.

The inside face of described special-shaped elastic caoutchouc circle 125 has axial lubrication at least one, and the cross-sectional plane of special-shaped elastic caoutchouc circle 125 is an eight shape.

Described combined seal ring 118 is provided with and the corresponding eight shape cavity of special-shaped elastic caoutchouc circle 125 outside faces, adopt rubber or polyurethane to form one with seal ring and with dust ring, at least be provided with one sealing lip 126 on this combined seal ring 118, and dust excluder lips 128 in being provided with together at least, one outer dust excluder lips 121, the surface of internal cavity of this combined seal ring 118 is an eight shape, the outside dimension of the interior dustproof lip of this combined seal ring is greater than the outside dimension of the sealing surface that cooperates with seal ring, outer dust excluder lips contacts with the counterbore sidewall, between dust excluder lips and sealing lip, establish a recessed U type that prevents to interfere mutually or circular arc type and reconcile groove 129, this degree of depth of reconciling groove 129 is 1-5mm, width is 0.5-3mm, and the angle of horizontal surface is between 0 °-90 °, and the radius that circular arc type is reconciled groove is 1-5mm.

Reconcile at the eight shape cavity inside face of described combined seal ring 118 and U type or circular arc type and to be provided with one between the groove 129 and to open seam 115.

Referring to accompanying drawing 2, the most important condition that can the quantity of vertex sealing bar decision 190mm and following pitch liquid lubrication crawler belt be implemented in this kind sealing arrangement, combined seal ring 118 and elastic caoutchouc circle 125 adopt axially stack be exactly for the radially quantity that reduces sealing member to adapt to small space.Two sealing member cross-sectional plane radial dimensions are identical substantially, pin minimum place, elastic caoutchouc circle toe out shape top just and can not separate at the minimum place of eight shape in the combined seal ring cavity, be connected in one and pack into together in the chain link counterbore 4, the function of two parts has been realized in the position that radially only accounts for a sealing member.This structural change provides loose relatively radial space for the sealing member of resetting, both guaranteed the thickness that thrust washer 124 is required, it is thick in to possess reliable, lasting elasticity to leave enough position increase bodies to elastic caoutchouc circle 125 again, avoided three sealing members to be arranged in order the deficiency of being forced to cut down wall thickness, reducing intensity, a thrust washer and a poted assemblies that axially superposes only are housed in the counterbore, and the sealing of the lubricated crawler belt of fine pith is implemented in making.

Track link counterbore 4 is installation sites of sealing member at chain link axle head 7 medial surfaces, and counterbore external port 127 is unique passages that pollutants is invaded.The external port of existing dry type crawler belt and seal lubrication type crawler belt is all opened wide, and big outer little in this mouthful, pollutants is invaded the back and is difficult for discharging, and the elastic force that solidifies back weaken flexibility rubber ring by the pollutants precipitation of this mouthful easily makes seal failure.Just blocked the intrusion of pollutants as blocking unlimited breach herein, that will prolong the service life of seal ring, and the narrow and small sealing member in region has only the combination of support herein.

Adopt the dust ring 117 of array mode to have support can enter counterbore external port 127, establish one between the dust ring 117 of combined seal ring 118 and the seal ring 116 and reconcile groove 129 and interfere to each other preventing, reconcile groove and establish certain degree of depth, width, angle and guarantee dust excluder lips 128 and sealing lip 126 reliable operations.

The diameter of assembling initial condition dust ring inner lip 128 is greater than the outside dimension of guide side seal face, the dust ring lip begins to contact with the outer chamfering linear portion driving surface of guide end face under the effect of elastic caoutchouc circle, elastic caoutchouc circle 125 is compressed the elastic force enhancing at this moment, continuing to press-fit dust ring inner lip 128 is swollen by the outer chamfering conical surface of guide end face, at this moment the sealing lip 126 of combined seal ring begins to contact with guide 6 side seal faces, owing to have machining tolerance and cumulative limit, the u shape of this moment or circular arc are reconciled groove 129 and are begun to play a role, and it guarantees that seal ring lip 126 and interior dust ring lip 128 do not interfere.

After being press-fit into place, the sealing lip 126 of combined seal ring combines with guide 6 side seal faces closely realizes sealing, the diameter of outer chamfering driving surface of guide end face and interior dust ring inner lip 128 contact positions is greater than the internal diameter under the dust ring lip free state simultaneously, interior dust ring inner lip 128 quilts are swollen makes both in conjunction with closely realizing sealing, realizes in first place dustproof simultaneously at the realization leak free.

In chain link counterbore sidewall 119 external port are last stop places of dust excluder lips 121 outside the combined seal ring, belong to static dustproof herein, the outer lip of chain link counterbore external port sidewall and dust ring does not have relative rotary motion, but fine motion is arranged axially, for making sealing herein effectively, lastingly, the roughness Ra value on chain link counterbore sidewall 119 surfaces is 0.8, when dust ring lip in first place is swollen by the outer chamfering conical surface of guide end face, dust ring outer lip 121 is also swollen thereupon presses counterbore external port sidewall 119, realizes outside second place dustproof.

The dust ring outer surface of combined seal ring is provided with dust excluder lips at least one, suitably increases the area of contact that dust excluder lips can reduce dust ring and chain link counterbore sidewall 119, reduces friction and reduces the axial motion resistance.

More than two place's lip formula dust rings when the guide endplay changes, the dust ring of combined seal ring and the variation of seal ring are unequal, the effect of reconciling groove is that the elastic force of elastic caoutchouc circle is distributed to dust ring and seal ring equably, guarantee dustproof with seal between do not interfere, do not influence the stressed of another seal ring or dust ring because of the resistance of wherein some seal rings or dust ring increases, the conciliation groove of combined seal ring plays the conciliation effect and realizes compensate function.U shape or circular arc conciliation groove 129 can be opened groove 115 (seeing accompanying drawing 2b) for strengthening mediation function, dust ring 117 also can adopt identical or different matter leakproofing material with seal ring 116.

No matter guide axially, what kind of variation takes place in diameter clearance; more than two kinds reconcile grooves (blind groove, groove) and make dust ring and seal ring can both the while stressed; it is inner that dust ring stops muddy water to be invaded by external port, seal ring under shielded condition shutoff that lubricating oil is lasting in oil storage chamber.

Thrust washer 124 internal diameters and bearing pin 5 external diameters leave the gap and do not interfere each other, thrust washer external diameter and combined seal ring, the internal diameter of elastic caoutchouc circle also leaves the gap, the combined seal ring that press-fits the back polyurethane material has certain intensity, radial variations is little, but the elastic caoutchouc circle is axial, radially all will change, especially elastic caoutchouc circle inside diameter surface easily takes place and contacts each other with the thrust washer external diameter and rub in radial deformation, for preventing and reducing this friction, adopt toe out shape curve to dodge in the middle and lower part of elastic caoutchouc circle, elastic caoutchouc circle inside diameter surface axially has one lubrication groove at least simultaneously, and lubrication groove is full of lubricating oil and plays the antifriction antiwear effect.The thrust washer both ends of the surface respectively have wide, be at interval 120 ° straight line lubrication groove of 1-3mm deeply, be convenient to flowing of lubricating oil.

Guide 6 press-fits driving surface and chain link 8 press-fits the outer chamfering conical surface leading portion in back without any damage, in dustproof unique can utilization place just outside guide 6 on the chamfering conical surface (as shown in Figure 2), therefore, the bore area of guide 6 below φ 38mm has an oil storage chamber 13 at least, the outer chamfering of guide 6 end faces≤45 °, and the outside face that makes its chamfering is a linear portion, the linear portion driving surface seals in order to dust ring, adopt little round-corner transition in order to assembling at the two ends of linear portion, squareness 0-the 0.02mm of guide end face and inner hole centreline, guide sealing surfaces roughness Ra value is 0.4.The outer chamfer surface of guide end face, end face is the position that contacts with seal ring, dust ring, existingly herein rotatablely move and axial motion arranged, the roughness of its guide end face surface, dimensional accuracy, with the sealing of the lubricated crawler belt of squareness influence of inner hole centreline.

Referring to accompanying drawing 4b, the middle vertical, horizontal of existing track link linkage section all has slit 136,150 one, this structural reason makes chain link working face of guide rail linkage section 135 unequal with the area of thrust surface of interlude 133, cause wearing and tearing also unequal, working face of guide rail 134 occurs uneven, this is that a kind of universal phenomenon is a weight, adjusts on the interlude of chain link working face of guide rail 134 and the surface of linkage section and the method that the side takes to increase and decrease physical dimension; Or dig up more than the summation of linkage section vertical, horizontal slit area in the centre of chain link working face of guide rail interlude (seeing accompanying drawing 4e) or be tending towards the summation of area, the area of thrust surface of the different sections of working face of guide rail are equated or be tending towards equal.

The side thickening 0-10mm of described track link 108, when the chain link working face of guide rail makes progress horizontal positioned, cut part formation depressed part from the interlude driving surface and the intersection, side of chain link, or it is vertically middle at chain link interlude driving surface, at least have the U type groove of wide 0-10mm together, described depression perpendicular to the downward 0-5mm of chain link working face of guide rail Portion is located atThe medial surface of track link, the lateral surface of track link or while Be located atThe inside and outside side of track link.Cut the depressed part that a part forms by this, make Effective width (bearing of trends of a plurality of track links) maintenance along the longitudinal direction of a plurality of track link 108 driving surfaces unanimous on the whole.

The side thickening 0-10mm of track link working face of guide rail, downward 0-10mm begins to be less than 45 to remove a part and form sunk part to the working face of guide rail surface from the vertical driving surface of interlude both sides, all the other add thickness and still keep, and take into full account the area of contact of caterpillar wheel shell outer ending convex medial surface and track link guide rail lateral surface driving surface 130 reserve parts simultaneously.Lateral surface driving surface 130 reserve parts still are on the straight line, and guarantee not interfere, and guarantee the necessary area of contact of capability for correcting again, shown in accompanying drawing 4a, 4b with caterpillar wheel shell outer ending convex medial surface.

Can be as required, 130 downward 0-10mm begin to be less than 45 only to remove a part and form sunk part to working face of guide rail face width 0-10mm place from the interlude driving surface outside, and medial surface is motionless, shown in the accompanying drawing 4c.

Also can be as required under the interlude driving surface lateral 0-10mm beginning be less than 45 and only remove a part and form sunk part to working face of guide rail face width 0-10mm place, lateral surface is motionless, shown in accompanying drawing 4d.

Also can be vertically middle at chain link interlude driving surface as required, have the U type groove of wide 0-10mm together at least perpendicular to the downward 0-5mm of chain link working face of guide rail, two sides are motionless, shown in accompanying drawing 4e.

After the track link assembling, the Effective width of working face of guide rail linkage section 135 at a point cross-sectional planes and interlude 132 at a point cross-sectional planes Effective width equate or be tending towards equal, the isometric area of thrust surface of chain link working face of guide rail linkage section and interlude are equated or be tending towards equal, and then make 134 wearing and tearing of chain link working face of guide rail evenly, all the time be in straightened condition, increased the stability that machinery travels, prolong the service life of track link naturally.

Referring to accompanying drawing 3,5, when described caterpillar block fastening nut is non-cylindrical, track link adopts and the corresponding steady job groove of non-cylindrical fastening nut, this steady job groove is symmetrical structure about bolt hole center's line, this steady job well width is greater than non-cylindrical fastening nut diameter 2-8mm, this steady job trench bottom driving surface is parallel with the chain link bottom surface, parallel with chain link two ends pin-and-hole, the radius of knuckle is less than the radius of non-cylindrical fastening nut between the dual-side of this steady job groove and the bottom driving surface, the width of non-cylindrical nut plane driving surface is less than work nest bottom face width, the work nest top is an arch, the fastening nut both ends of the surface are parallel with the tapped bore line of centers, equidistantly or not equidistant, the tapped bore of fastening nut adopts blind hole.

When described caterpillar block fastening nut when being cylindrical, track link adopts and the corresponding steady job groove of cylindrical fastening nut, this steady job groove is the circular symmetric structure work nest, the diameter of this circular symmetric structure work nest is greater than the diameter 2-8mm of cylindrical fastening nut, the bottom driving surface of circular symmetric structure work nest and the bottom surface of chain link are parallel surfaces, with chain link two ends pin-and-hole be parallel hole, this circular symmetric structure work nest line of centers and chain link binding bolt centerline hole radial tolerance are 0.20mm, the position of the circular symmetric structure work nest of this fastening nut is parallel with chain link two ends pin-and-hole line of centers between two bottom surfaces, the fastening nut both ends of the surface are parallel with the tapped bore line of centers, fastening nut both ends of the surface and tapped bore line of centers equidistantly or not equidistant, the tapped bore of fastening nut adopts blind hole.

When the screw thread two ends of described track link in caterpillar block fastening screw keyhole are provided with sealing member, head end is provided with a stepped hole that is lower than end face at the screw terminal of caterpillar block binding bolt and the coaxial place of centerline hole, place sealing member elastic caoutchouc circle at this stepped hole, terminal termination at caterpillar block fastening screw keyhole negative thread to and place between the cross-drilled hole of caterpillar block fastening nut not that machining screw realizes that smooth outside face is used to place sealing member, described caterpillar block fastener contacts with described sealing member by the screw thread in the caterpillar block binding bolt screw-in track link fastening screw keyhole and realizes that screw thread is sealed at both ends, and caterpillar block and track link are tightened together.

Wherein, track link is provided with two lightening holes above caterpillar block fastening screw keyhole negative thread, and this lightening hole promptly is the standby hole of placing the cylindrical fastening nut of caterpillar block.It is again the sealing member encapsulated holes that is used to protect track link fastening screw keyhole negative thread.

Referring to accompanying drawing 5a, the caterpillar block fastening nut has the main body of non-cylindrical substantially, track link 148 adopts and the corresponding steady job groove 144 of non-cylindrical fastening nut, this caterpillar block 56 is by bolt 141 and caterpillar block fastening nut 112,142 tighten together with track link 148, dual-side 144 and bolt hole center's line 140 symmetric figure structures, the work nest width is greater than non-cylindrical fastening nut 112,142 diameters, 2-8mm, bottom driving surface 143 is a parallel plane with the chain link bottom surface, knuckle between dual-side and the work nest bottom driving surface is less than non-cylindrical fastening nut diameter, work nest top 147 is an arch, fastening nut 112,142 both ends of the surface are parallel with nut tapped bore line of centers, equidistantly or not equidistant, the tapped bore of fastening nut can adopt blind hole.

The existing plane of nut 112,142 outside faces, again curved surface arranged, all can be applicable to track link 148 non-cylindrical fastening nut steady job grooves 144, X-Y is the curve of laying in a coffin and dwindling in the accompanying drawing 5a enlarged drawing, make the plane face width at Y point place less than work nest bottom 143 plane face widths, the X point is greater than the vertical distance that project to tapped bore line of centers of Y point at horizontal surface, this greater than difference can make the fillet at turning, nut work nest bottom increase the dual-side width to reduce.The dual-side width makes the X point contact with side 144 earlier, and on 143 plane driving surface any interference did not take place at bottom Y o'clock greater than non-cylindrical fastening nut diameter 2-8mm when reversing nut.The X point stops its nut to continue the degree of freedom of rotation with contacting of side 144, reaches fixing purpose.The curved surface obstacle climbing ability is strong, and when nut catching phenomenon can not take place when outer surface contacts with chain link work nest 144 sides in the precession process, dismounting need not be by other auxiliary setting tool.

Referring to accompanying drawing 5b, the caterpillar block fastening nut has the main body of general cylindrical, track link 149 adopts and the corresponding steady job groove 145 of cylindrical fastening nut, this caterpillar block 56 tightens together with track link 148 by bolt 141 and caterpillar block fastening nut 146, circular fastening nut steady job groove 145 adopts and caterpillar block binding bolt centerline hole symmetric figure structure, the work nest diameter is greater than cylindrical fastening nut 146 diameters 2-8mm, the bottom surface of circular work nest bottom driving surface and chain link is a parallel surfaces, with chain link two ends pin-and-hole be parallel hole, circular work nest line of centers and chain link fastening screw keyhole 140 line of centers radial tolerance are 0.20mm, the position of circular fastening nut steady job groove can be selected arbitrarily between track link two bottom surfaces, fastening nut 146 both ends of the surface are parallel with nut tapped bore line of centers, equidistantly or not equidistant, the tapped bore of fastening nut can adopt blind hole.

Track link 149 fastening nut steady job grooves 145 adopt circular configuration, and the difference that combines with existing outer cubic fastening nut of driving surface is the change of fixed by nut position bottom work nest, is the variation apart from size of nut and work nest dual-side.The circular work nest of track link is to realize fixing by the degree of freedom of work nest dual-side restriction fastening nut, rather than existing fastening nut leans on the both sides chamfering of work nest root to fix, cylindrical fastening nut has only the degree of freedom and the very little angle of inclination of above-below direction, again can not follow bolt and rotate together.

Cylindrical fastening nut 146 combines with circular steady job groove 145 in the accumbency mode, for making the nut convenient disassembly, the radius of circular work nest is greater than the radius of cylindrical nut, when nut 146 with after bolt 141 combines, be subjected to the restriction of the left and right degree of freedom of work nest, nut does not need fixedly that operation brings convenience to production and assembly, and along with the increase of assembling spanner moment of torsion, it is in place that the curved surface of nut 146 outside faces is followed circular work nest 145 automatically.

Cylindrical fastening nut 146 is different from existing U type fastening nut and needs directivity, outer cubic fastening nut dismounting needs accessory appliances, it do not have directivity arbitrarily one side all can be used as driving surface, dismounting also need not accessory appliances, has characteristics such as the strong and area of contact of self-orientation is big.

Work nest 145 processing capacity seldom just can guarantee the technical requirements of steady job groove faying face; Periphery does not have focal point of stress, and mechanical property is good, and its auxiliary hole can reduce the online length of the halt of workpiece to boring simultaneously with pin-and-hole behind the hot die forging blanking, and circular work nest is produced very useful to specialization, and it can drilling on manufacturing line.

Referring to accompanying drawing 5c, track link 108 caterpillar block fastening screw keyholes 140 communicate with the hole 111 of placing the caterpillar block fastening nut, and two centerline holes are vertical and intersect (or vertical and from).Brought convenience for like this screw thread processing in fastening screw keyhole and the hole, the while has also brought the hole negative thread problems such as suffering muddy water pollution, corrosion that communicates with the external world, and repair demolition easily makes the caterpillar block binding bolt twist off, for this reason, and sealed at both ends with the hole negative thread.

Head end, it is the screw terminal of caterpillar block binding bolt, this screw terminal and centerline hole coaxial place processing one is lower than the stepped hole 110 of end face, be used to place sealing member elastic caoutchouc circle, when the caterpillar block binding bolt enters in the hole, radially, the external diameter of binding bolt 141 contacts with the medial surface of elastic caoutchouc circle, the lateral surface of elastic caoutchouc circle contacts with the medial surface of stepped hole 110 and realizes sealing simultaneously, axially, an end face of elastic caoutchouc circle touches with the bottom connection of stepped hole, the other end contacts with the mounting plane of caterpillar block and realizes sealing.

End, i.e. the clearing end of hole negative thread, the termination of negative thread to and place between cross-drilled hole 111 bottoms of caterpillar block fastening nut not that machining screw realizes smooth outside face.Use less than the drill bit of internal thread diameter the binding bolt hole drill is logical earlier, and then the hole of Drilling Operations negative thread, the internal thread hole end does not drill through with cross-drilled hole must produce a shoulder in the place of passing through mutually, this shoulder to screw tip is a cylindrical space, be used to place rubber seal 109, the rubber seal 109 of one column type placed in the hole stop to smooth no screw thread place and by shoulder, when replacing columniform rubber seal 109, the top of the caterpillar block binding bolt of precession begins little deformation, the deformation of cylindrical rubber sealing member increases when continuation precession binding bolt reaches moment of torsion, combines closely with threadless smooth place sidewall in the hole and realizes sealing.

Terminal another kind is selected: also can the hole drill of machining internal thread is logical, and after disappearing, can adopt shoulder cone through hole rubber plug 113 and stepped self-locking plunger 112 sealing members encapsulation.The big end of cone through hole rubber plug has a recessed counterbore along the through hole line of centers, and this counterbore is used to hold the big end of stepped self-locking plunger in case plunger moves outward, and stepped self-locking plunger front end is provided with lead angle and is convenient to encapsulation (or change stepped self-locking plunger into cone).

The encapsulation of binding bolt bore end.At first, one hard cylinder is suitable with hole 111 external diameters of placing the caterpillar block fastening nut, pack in its hole as accessory appliances, be used to locate the position of cone through hole rubber plug, then with cone through hole rubber plug 113 small ends preceding, big end arrives in the load hole of back and limits the position, use again greater than stepped plunger 112 small ends of rubber plug through-hole diameter and pack in the hole of cone through hole rubber plug 113, cone through hole rubber plug is combined closely with hole wall by the plunger radial extruding greater than its through-hole diameter, and the step portion that makes stepped plunger enters in the counterbore of rubber plug, withdraws from accessory appliances and finishes encapsulation.

Because sealing is realized at the two ends of fastening screw keyhole negative thread, make blind hole processing become through hole processing, greatly improve the drilling speed of fastening screw keyhole and improved the manufacturability of hole internal thread machining, be fit to the technological requirement of manufacturing line.Place the hole of caterpillar block fastening nut and adopt circular configuration, forging, drilling all can be implemented.

The reinforced rib that connects in the middle of two holes between track link two bottom surfaces does not still keep not destruction, and track link single-piece rigidity, intensity obtain keeping, and have created condition for the adjustment of track link local structure, and expendable weight is all in it.Above negative thread, increase by two circular ports, this hole is not empty establishes but the standby hole of holding cylindrical fastening nut, track link 108 is except that reaching the effect of saving fastening nut, its maintainability is strong, the caterpillar block binding bolt can conveniently take out as through hole if any fractureing, and can adopt standby hole if there is negative thread to damage, prolonged the service life of track link, the overall efficiency of track link obtains performance on year-on-year basis.

In addition, the hole 111 (being lightening hole) of placing the caterpillar block fastening nut can also be removed 109,113 in the accompanying drawing 5 as tapped bore leak free encapsulated holes as standby hole, with 112,113 sealing members in the accompanying drawing 5 and hole 111 encapsulation (not shown in the accompanying drawing).

The outside thread of caterpillar block binding bolt is being subjected to sufficient seal protection with engaging of track link 108 negative threads, has eliminated the worry that people twist off the binding bolt easy-to-rust, and the caterpillar block binding bolt becomes a dismounting freedom, reusable fastener.

Referring to accompanying drawing 6, according to the split type connecting link 49 (hereinafter to be referred as chain link 49) that is used for crawler belt of the present utility model, comprise: axle head chain link 51, this axle head chain link 51 have second layer tooth be the tooth master of lower floor connect surface (for example E-F) and ground floor tooth be the upper strata tooth auxiliary is connected surperficial, connect this second layer tooth master and to be provided with at least one on the surface and to connect tooth, and be provided with at least one on the surface and connect tooth 54 in auxiliary connection of this ground floor tooth.Chain link 49 also comprises: cover end chain link 50, this cover end chain link 50 have be connected with the axle head chain link 51 corresponding second layer tooth masters surface (for example N-W) and ground floor tooth assist be connected surperficial, on this master's connection surface, be provided with at least one and connect tooth, this main lip-deep connection tooth and corresponding main lip-deep connection indented joint that is connected of connecting, be provided with at least one connection tooth 55 on the surface in this auxiliary connection, this connects tooth 55 and engages with the corresponding tooth 54 that is connected.

When described crawler belt connecting link is split type crawler belt connecting link, the connection tooth driving surface of this split type crawler belt connecting link is double-deck, it is between M-N between the line N point of bottom surface that upper bottom surface M point is adopted on the upper strata, increase one or more pulling force teeth, lower floor adopts straight line lengthening driving surface E-F, the multiple tooth low-angle structure of N-W, straight line lengthening driving surface is the assembling benchmark, axle head chain link and cover end chain link divide combination on the dignity at double-deck tooth, and make this kind chain link fastening screw keyhole identical with same model integral type chain link fastening screw keyhole.

The extended line of upper and lower two-layer connection addendum face is parallel or crossing, and wherein, lower floor's addendum face is a dynamically changeable with respect to the angle α of chain link two bottom surfaces, this α angle between 0 °≤α≤29 °, 5 to 10 of the numbers of teeth.

The tooth profile angle β of pulling force tooth is a dynamically changeable, wherein the β angle in ° scope of 60 °＜β＜100,

Incision line between the initiating terminal of the end of upper strata tooth and lower floor's tooth is a dynamically changeable with respect to the angle theta between chain link two bottom surfaces, and wherein, the θ angle is between-90 °＜θ＜90 °, and the initial point of incision line can be in any one side of chain link two bottom surfaces.

Chain link 49 plays hiding of interconnect function when increasing an assembling in the middle of two fastening screw keyholes 57 or the exposure formula is waitd upon clothes bolt 53,58.

Referring to accompanying drawing 6a, with pin shaft hole 59 centers is that initial point is established plane right-angle coordinate, L, K two line intersection point V are first auxiliary joint face first stress point above pin shaft hole 59, the V point is crossed the chain link pin-and-hole near center, hole vertical line with respect to the projection of chain link bottom surface, the outside at fastening screw keyhole 57, ground floor pulling force tooth 54 (cover end) and 55 (axle heads), the incision line is crossed last stress point wide-angle of ground floor pulling force tooth and is directly met at the N point down to second layer pulling force tooth N-W, and second layer pulling force tooth is formed stressed tooth group and constituted the main stress point by number is multiple tooth.So far, the first stress point V, the second stress point N together with the 3rd stress point D of pin shaft hole below disjunctor part, has constituted the stable triangle of VND power.Purpose just is to set up the second layer pulling force tooth joint face of low angle, multiple tooth, lengthening assembling benchmark.

Stable triangle has been arranged, the angle α of second layer pulling force tooth and chain link bottom surface can dynamically be adjusted between 0 °≤α≤29 °, there has been low angle second layer pulling force tooth driving surface to obtain lengthening, the driving surface number of teeth increases stress point and disperses, because angle α reduces, connecting the tooth angle degree also changes thereupon and is tending towards 90 °, be subjected to the change of force direction to reduce the component of tooth and the friction stress Joint strenght that is subjected to of tie bolt increases, and then improved the reliability of split type crawler belt connecting link, it has changed existing list, two, circle-arc tooth, multiple tooth first stress point is on the low side, the deficiency that takes over.

E-F straight line is on axle head chain link 51 after chain link 49 separates, and N-W straight line is on cover end chain link 50, and the E-F on the branch dignity, N-W have enough straight lengths to satisfy the requirement of assembly precision, need not be benchmark with chain link two bottom surfaces.Whether left and right two chain links divide dignity in a plane during assembling, with measuring at once: be about to a dull and stereotyped cubing and put on the N-W straight line driving surface of left and right two chain links once dull and stereotyped cubing, press the locating back cubing and the swing proof takes place not in a plane, be adapted at any time and guarantee that left and right two chain links divide dignity to be press-fit into place again in a plane.At this moment, the bottom surface of connecting link is also in a plane.

The multiple tooth straight line driving surface of lengthening has increased the assembly precision and the speed of connecting link, and the in-line crawler belt cover end chain link 50 after the assembling docks with axle head chain link 51 and just become an osed top endless track.The chain link 49 that the second layer pulling force teeth that the rock-steady structure that is made of three stress points and number are many are formed, make and be connected with reliability and persistence, especially the α angle of cutting the θ angle of line, main connection surface is variable, crawler belt connecting link bonded assembly comformability is strengthened, make the design of the crawler belt connecting link of different pitches, different purposes more become reasonable.Present embodiment still can implement to see accompanying drawing 11b when the angle of α is reduced to 0 °.

Chain link 49 is two split parts, and the setting of ground floor pulling force tooth therebetween is hooked in together traction as same integral body mutually like two hooks.Solved the deficiency that point of penetration is separated to overlength between stress point, incision line point of contact is to very little distance is arranged between stress point, under identical external load with accompanying drawing 6c in the corresponding stress point of N point compare, for accompanying drawing 6c, can imagine at M---the N section does not have the tensile strength of the effect chain link of pulling force tooth greatly to reduce, the N point is to cutting line import M place without any connection, differ the difference of a h=h0-h1, with the N point serves as that axle has the trend of being drawn back, external load concentrates on stress point or adds and is planted on the binding bolt, especially work as chain link and operate in drive wheel, it was subjected to force direction that about 30 ° deflection takes place when the extra curvature of track adjusting wheel was surperficial, bigger to the chain link influence, the N stress point goes out to cutting line among the accompanying drawing 6c, the entrance overlength is separated stress point and is concentrated, and US4365848, CN1294070A, all there is this tendency in CN2818282Y, and the chain link turning is quickened in the variation of tension cycle of stress, the metal fatigue of binding bolt.

Further relatively show, before the N point, among the accompanying drawing 6c N point to the point of penetration respective figure 6a the N point to point of penetration, accompanying drawing 6c is the opening that separates, and accompanying drawing 6a exists ground floor pulling force tooth and part second layer pulling force tooth, 49 liang of splits of chain link are combined as a whole, minute take off a part of external load among the first accompanying drawing 6c before the N point; After the N point, accompanying drawing 6c has the opening of a pulling force tooth and separation, and accompanying drawing 6a is several Duola's power teeth of low angle lengthening, no matter being subjected to force direction that what kind of takes place changes chain link 49 all do not had and influences, chain link 49 stress point driving surface summations are greater than the summation of accompanying drawing 6c, stress point disperses carrying steadily, chain link 49 connects tooth head, the tail stress point is in two fastening screw keyhole outsides, to have the projection covering of chain link head and the tail stress point now with respect to the projection of chain link two bottom surfaces, therefore, the fastening screw keyhole can be selected without restriction with the identical width between centers of this model integral type chain link, and caterpillar block is realized exchanging and be unified.

Referring to accompanying drawing 7, chain link 49 is that incision line θ angle changes the back less than 90 ° embodiment

The different pitch chain link two hole lines of centres to the height of working face of guide rail changes, it is irrational adopting fixing incision line angle degree, reach angle with rational, the θ that does not have this variation of effect of ground floor pulling force tooth, the α angle can not be realized, the branch body portion that ground floor pulling force tooth is cut prior art line makes split become integral body by the fastening of clenched bolt of tooth, so the α angle of the θ angle variation that changes has just been arranged, and then variable β angle just arranged, thus, make the tooth position and the profile of tooth that connect tooth more become reasonable, the needs that adapt to different pitches are eliminated or are alleviated shearing to binding bolt.Its component at the flank of tooth is reduced gradually, be zero or be cancelled.

When cutting line θ angle less than 90 °, chain link 49 is provided with a hollow groove 47 between M-N, axle head chain link 51 and the line vertical direction of cover end chain link 50 along two centerline holes can be moved up and down, having had the degree of freedom that moves up and down to connect tooth just can realize combination and separate, connecting the ground floor tooth of tooth and the profile of tooth of second layer tooth can be the same or different, but the combination that the ground floor tooth can not influence second layer tooth with separate, between M-N the hollow groove movably distance mutually combine with to separate required height equal with being connected between cog at least, or greater than mutually combining and separating required height.

Because the θ angle changes the back less than 90 °, the incision line is turned back and is made the ground floor tooth and the second layer tooth of connection tooth overlapping in the projection of chain link bottom surface, increases the total length that connects the surface thus, and then work number of teeth increase bonded assembly reliability further strengthens.The connection driving surface of second layer tooth can be reduced to ideal height, the tooth profile angle β that connects the tooth driving surface changes in ° scope of 60 °＜β＜100, have only that the β tooth profile angle can be reasonably greater than 90 ° when the α angle is reduced to less than 29 °, the component that the connection driving surface of tooth is produced makes the connection of chain link 49 tightr.

When β＜90 °, produce a component along the second layer flank of tooth, this component constitutes the caterpillar block binding bolt to be sheared, and the ground floor back of tooth that cuts out after part 48 reinstalls the original place of hollow groove 47 is offset between the component that is produced on the second layer flank of tooth is by M-N thus.

The cutting out part 48 and whether reinstall the original place and decide of hollow groove on the specification of crawler belt size, cutting out when partly reinstalling the original place (accompanying drawing 7a, b) of hollow groove, binding bolt lengthening can be passed and cut out part and cut out the part pinning with holes, the part 48 that cuts out of hollow groove stays put and has eliminated the degree of freedom that the chain internode moves up and down, the axle head chain link just can not separate with cover end chain link, and the partial replacement original place that cuts out of hollow groove makes the connection of chain link increase safety lock one.

Chain link 49 fastening screw keyholes are identical with same model integral type chain link fastening screw keyhole, 57 one of middle increase play hiding of interconnect function when assembling or the exposure formula is waitd upon clothes bolt 53,58, after two split type chain links engage, to wait upon the clothes bolt and screw in tapped bore and tighten by standard torque, that installs then that caterpillar block can be easy and convenient makes the crawler belt butt joint again.

Referring to accompanying drawing 8,9, entire track connecting link 60 comprises: the pin shaft hole 65 and the guide hole 66 that are used for connecting link; Expansion slot 63; Wait upon clothes tapped bore 68, the inner hole wall of at least one in described pin shaft hole 65 and guide hole 66 of this expansion slot extends to predetermined length and opens an expansion slot 63, but expansion slot is divided into the integral type connecting link first and the second portion of relative displacement, what impel its relative displacement is to wait upon clothes tapped bore 68, this waits upon the chain link interior (accompanying drawing 8a) that the clothes tapped bore is located at two binding bolts, 61 middle firsts, purpose is to be screwed into waiing upon in the clothes tapped bore 68 and promote second portion two parts being separated of first by waiing upon clothes bolt 62, when separating, make the enlarged-diameter at least one hole in described pin shaft hole and the guide hole, and be beneficial to described axle shape spare is inserted in described pin shaft hole and the guide hole at least one, make things convenient for installation shaft shape spare at least one in described pin shaft hole and guide hole thus, thus unload wait upon the clothes bolt after, tighten caterpillar block binding bolt 61 and axle shape spare is fixed on realizes the crawler belt butt joint in described pin shaft hole and the guide hole at least one.

Concrete operations: the expansion of adopting common wrench that clothes bolt 62 screw-in entire track connecting links 60 are waitd upon in expansion is waitd upon in the clothes tapped bore 68, under the effect of moment of rotation, expansion is waitd upon the clothes bolt and is crossed expansion slot 63 and contact with the opposite, continuing rotation expansion slot 63 begins to expand, and pulling finishing 64 begins elastic deformation to stopping the hole, the pin shaft hole 65 of feasible fluting is greater than the diameter of bearing pin, at this moment bearing pin being aimed at connecting link pin shaft hole 65 just can pack into hand easily, screw out expansion bolt 62 then, external force is removed the rear pin shaft hole and is combined with bearing pin closely, caterpillar block 67 is in place to be tightened firm bolt 61 again, and the effect lower bearing pin that gives tight power at bolt cooperates firmly promptly to be connected with pin shaft hole and finishes; When dismounting,, opposite order can equally easily realize according to being installed.

Described entire track connecting link 60 ended from the axle head inner hole wall beginning to cover end inner hole wall 10-50mm, or begin only to open an expansion slot 63 to axle head inner hole wall 10-50mm from chain link cover end inner hole wall, the terminal point of this expansion slot 63 has finishing, and the two ends of finishing are provided with and stop the hole

Described expansion slot and finishing are the combination of straight line, curve or straight line and curve, described expansion slot is located on the line at center, two holes or in a side of the line of centres, the width of described expansion slot is 0.12mm-0.5mm, the upside of described expansion slot is provided with two steady job grooves that are used to install circular clamp nut

The caterpillar block fastening screw keyhole and the expansion slot upside of described entire track connecting link 60 is provided with two steady job grooves that are used to install circular clamp nut and communicates, and makes the two through hole vertical and intersectant centerline,

The rubber seal of protection screw thread is installed in the steady job groove of described circular clamp nut,

Described integral type connecting link 60 is provided with a spill seal groove along the circumferential surface of bearing pin endoporus, in order to 0 RunddichtringO to be installed, bottom and bearing pin endoporus coaxial direction at groove are provided with a manhole at least on expansion slot, in order to rubber strip to be installed, transitional slot less than the manhole diameter is set between manhole and bearing pin endoporus circumferential surface, spill seal groove and manhole intersect, one end face of manhole inner seal liner contacts with the bottom face of special-shaped elastic caoutchouc circle, the sealing member elastic caoutchouc circle outside in other end side and the groove contacts, elastic caoutchouc circle medial surface contacts with the outside face of bearing pin in the pin-and-hole and forms sealing

Described integral type connecting link is provided with the seal groove of the installation cone elastic rubber strip sealing member of a transitional slot along the circumferential surperficial overexpansion groove of bearing pin endoporus, one end of this cone elastic rubber strip sealing member contacts with the bottom face of described special-shaped elastic caoutchouc circle, and the inner surface of sealing member contacts with the outside face of bearing pin and forms sealing.

Entire track connecting link 60, play waiing upon clothes tapped bore 68 and waiing upon clothes bolt 62 of expansion when in the middle of two fastening screw keyholes of each connecting link 69, increasing an assembling so that install to expand, easy to connect for crawler belt, the screw thread 68 that the clothes bolt hole is waitd upon in expansion is identical with the screw thread of firm bolt 61

When being provided with screw thread in the entire track connecting link 60 firm bolts hole, columniform rubber seal can be located in two circular fastening nut steady job grooves,

Entire track connecting link 60 pin shaft holes 65 have destroyed the air-proof condition of chain link counterbore from inner hole wall beginning expansion slot, cause seal failure.Axle, inner room can not adopt liquid lubrication; Fill grease but bearing pin center processing and lubrication oilhole is installed oil nozzle the service life that connects for improving bearing pin, and in the stepped hole that zerk is in exempt to collide.When grease through oil nozzle, oil duct from pin shaft hole 65 and Peng expand groove 63 intersect opening parts when overflowing grease sealed the intrusion that opening has stoped pollutants, good maintainability can be applicable to the connection of liquid lubrication crawler belt.

Can recover hydraulic seal by the following technical solutions:

Entire track connecting link 60 also comprises poted assemblies 34,35,44, and the sealing assembly is used for preventing that the lubricating oil that accommodates a hole (pin shaft hole) of lubricating oil from leaking by described expansion slot 63.

Referring to accompanying drawing 10a, along the circumferential surface of bearing pin 5 endoporus one spill seal groove 43 is set, in order to 0 RunddichtringO 44 to be installed, bottom and bearing pin endoporus 65 coaxial direction at groove 43 are provided with a manhole 45 at least on expansion slot 63, in order to rubber strip 34 to be installed, the transitional slot 46 less than the manhole diameter is set between manhole 45 and bearing pin endoporus 65 circumferential surfaces.Spill seal groove 43 intersects with manhole 45, one end face of manhole 45 inner seal liners 34 contacts with the bottom face of special-shaped elastic caoutchouc circle 125, sealing member elastic caoutchouc circle 44 outsides in other end side and the groove 43 contact, and elastic caoutchouc circle 44 medial surfaces contact to form with the outside face of bearing pins 5 in the pin-and-hole 65 and seal.

Figure 10 a is that two circular minor diameter through holes are arranged side by side, firmly an Elastic Cylindrical rubber strip 34 is elongated, cross transitional slot 46 and first manhole 45 enters in second manhole, external force is removed back Elastic Cylindrical rubber strip and is restored to the original state, combine closely with second manhole 45, repeat once more elastic rubber strip is put into first manhole, external force releasing back elastic rubber strip 34 is stopped with first manhole by transitional slot 46 combines closely, rubber strip 34 increases the seal radial width with the form of relay, and Elastic Cylindrical rubber strip 34 1 ends are contacted with the special-shaped elastic caoutchouc circle 125 of chain link counterbore bottom sealing arrangement, other end side contacts with the lateral surface of 0 RunddichtringO 44 in the groove, realizes hydraulic seal.

Referring to accompanying drawing 10b, be provided with the seal groove 27 of a transitional slot 28 along the circumferential surface of bearing pin 5 endoporus, in order to cone elastic rubber strip 35 to be installed, one end of sealing member 35 contacts with the bottom face of special-shaped elastic caoutchouc circle 125, and the inner surface of sealing member 35 contacts with the outside face of bearing pin 5 and forms sealing.

This Figure 10 b elongates for the elastic rubber strip 35 that has tapering with a cross section, crossing transitional slot 28 enters in the cone through hole 27, external force is removed 35 reinstatements of posterior pyramids elastic rubber strip and is combined closely with cone through hole 27, and make cone elastic caoutchouc sliver transvers section cone small end exceed bearing pin endoporus 65 surface parts, cone elastic rubber strip 35 1 end faces contact with the elastic caoutchouc circle 125 of chain link counterbore bottom sealing arrangement, other end cone elastic rubber strip 35 side surface contact with bearing pin 5 outside faces in the pin-and-hole 65, realize hydraulic seal.

Entire track connecting link 60 setting is waitd upon the clothes tapped bore and is installed to expand and wait upon the clothes bolt expansion slot is expanded, the pulling pin shaft hole makes the connection of crawler belt become simple greater than pin diameter, fast, the connection mode that the artificial for a long time sledgehammer that is through with hits bearing pin, got rid of link center apart from overproof connection hidden danger, bonded assembly comfort feature and reliability are strengthened, as long as it is just passable that the crawler belt bearing pin of same model is made a kind of specification, choosing any bearing pin all can be used as the connection bearing pin and press-fits bearing pin, bring convenience for the batch manufacturing cost-cutting, realized that same model crawler belt connects the unification of bearing pin outside dimension, on site maintenance is better than split type, and the operator that especially can leave under the situation of the rare no maintenance condition of personnel freely selects to reach purpose of connecting.

Below illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that under the situation that does not break away from principle of the present utility model and spirit and can change that scope of the present utility model is limited by claims and equivalent thereof to these embodiment.

Claims (13)

1, a kind of crawler belt that is provided with the liquid lubrication sealing arrangement, comprise the crawler belt member that is provided with counterbore, be located at the sealing arrangement in the counterbore, the rotatable parts of crawler belt, track link, the crawler belt connecting link, caterpillar block, the attaching parts of caterpillar block, caterpillar block fastening nut-bolt, bearing pin and guide is characterized in that described liquid sealing device is by a thrust washer that is located in the described counterbore, special-shaped elastic caoutchouc circle connecing of a thrust washer radially adjoining and special-shaped therewith elastic caoutchouc circle combined seal ring doing axially stack is formed therewith, and the end face formation of this combined seal ring and described guide seals.

2, that the described crawler belt that is provided with the liquid lubrication sealing arrangement of root a tree name claim 1, the both ends of the surface that it is characterized in that described thrust washer respectively have is wide, be 1-3mm deeply, 120 ° straight line lubrication groove at interval, and outer surface roughness Ra value is 0.4.

3, the described lubricated crawler belt that is provided with liquid sealing device of root a tree name claim 1 is characterized in that the inside face of described special-shaped elastic caoutchouc circle has axial lubrication at least one, and the cross-sectional plane of described special-shaped elastic caoutchouc circle is an eight shape.

4, the described crawler belt that is provided with the liquid lubrication sealing arrangement of root a tree name claim 1, it is characterized in that described combined seal ring adopts rubber or polyurethane that seal ring and dust ring are combined, and be provided with and the corresponding eight shape cavity of special-shaped elastic caoutchouc circle cross-sectional plane, at least be provided with one sealing lip on this combined seal ring, and dust excluder lips in being provided with together at least, one outer dust excluder lips, the external diameter of the sealing surface that the external diameter of the lip of dustproof lip cooperates greater than combined seal ring therewith in this, outer dust excluder lips contacts with the counterbore sidewall, establishing one between dust excluder lips and sealing lip prevents to interfere recessed U type or circular arc type to reconcile groove mutually, this degree of depth of reconciling groove is 1-5mm, width is 0.5-3mm, and the angle of horizontal surface is between 0 °-90 °.

5, the described crawler belt that is provided with the liquid lubrication sealing arrangement of root a tree name claim 4 is characterized in that reconciling at the eight shape cavity inside face of described combined seal ring and U type or circular arc type being provided with one between the groove and opening seam.

6, the described crawler belt that is provided with the liquid lubrication sealing arrangement of root a tree name claim 1, the side thickening 0-10mm that it is characterized in that described track link, when the chain link working face of guide rail makes progress horizontal positioned, be provided with depressed part from track link interlude working face of guide rail and interlude driving surface intersection, side, or it is vertically middle at chain link interlude driving surface, at least have U type groove downwards one perpendicular to the chain link working face of guide rail, described depressed part be located at track link medial surface, track link lateral surface or be located at medial surface, the lateral surface of track link simultaneously.

7, the described crawler belt that is provided with the liquid lubrication sealing arrangement of root a tree name claim 1, it is characterized in that when described caterpillar block fastening nut is non-cylindrical, track link adopts and the corresponding steady job groove of non-cylindrical fastening nut, this steady job groove is for to be symmetrical structure about bolt hole center's line, this steady job well width is greater than non-cylindrical fastening nut diameter 2-8mm, this steady job trench bottom driving surface is parallel with the chain link bottom surface, parallel with chain link two ends pin-and-hole, the radius of knuckle is less than the radius of non-cylindrical fastening nut between the dual-side of this steady job groove and the bottom driving surface, the width of non-cylindrical nut plane driving surface is less than work nest bottom face width, the work nest top is an arch, the fastening nut both ends of the surface are parallel with the tapped bore line of centers, equidistantly or not equidistant, the tapped bore of fastening nut adopts blind hole.

8, the described crawler belt that is provided with the liquid lubrication sealing arrangement of root a tree name claim 1, it is characterized in that when described caterpillar block fastening nut when being cylindrical, track link adopts and the corresponding steady job groove of cylindrical fastening nut, this steady job groove is the circular symmetric structure work nest, the diameter of this circular symmetric structure work nest is greater than the diameter 2-8mm of cylindrical fastening nut, the bottom driving surface of circular symmetric structure work nest and the bottom surface of chain link are parallel surfaces, with chain link two ends pin-and-hole be parallel hole, this circular symmetric structure work nest line of centers and chain link binding bolt centerline hole radial tolerance are 0.20mm, the position of the circular symmetric structure work nest of this fastening nut is parallel with chain link two ends pin-and-hole line of centers between two bottom surfaces, the fastening nut both ends of the surface are parallel with the tapped bore line of centers, fastening nut both ends of the surface and tapped bore line of centers equidistantly or not equidistant, the tapped bore of fastening nut adopts blind hole.

9; the described crawler belt that is provided with the liquid lubrication sealing arrangement of root a tree name claim 1; it is characterized in that the screw thread two ends in described caterpillar block fastening screw keyhole are provided with sealing member; head end is provided with a stepped hole that is lower than end face at the screw terminal of caterpillar block binding bolt and the coaxial place of centerline hole; place sealing member elastic caoutchouc circle at this stepped hole; terminal termination at caterpillar block fastening screw keyhole negative thread to and place between the cross-drilled hole of caterpillar block fastening nut not that machining screw realizes that smooth outside face is used to place sealing member; described caterpillar block fastener contacts with described sealing member by the screw thread in the caterpillar block binding bolt screw-in track link fastening screw keyhole and realizes that screw thread is sealed at both ends; and caterpillar block and track link are tightened together; wherein; track link is provided with two lightening holes above caterpillar block fastening screw keyhole, this lightening hole skill is the encapsulated holes of the sealing member of protection track link fastening screw keyhole negative thread.

10, the described crawler belt that is provided with the liquid lubrication sealing arrangement of root a tree name claim 1, the connection tooth driving surface that it is characterized in that this split type crawler belt connecting link is for double-deck, the upper strata is M-N line from upper bottom surface M point to the line between bottom surface N point, be provided with one or more pulling force teeth, lower floor is straight line lengthening driving surface E-F, the multiple tooth low-angle structure of N-W, straight line lengthening driving surface is the assembling benchmark, axle head chain link and cover end chain link divide combination on the dignity at double-deck tooth, and make this kind chain link fastening screw keyhole identical with same model integral type chain link fastening screw keyhole

The extended line of upper and lower two-layer connection addendum face is parallel or crossing, and wherein, lower floor's addendum face is a dynamically changeable with respect to the angle α of chain link two bottom surfaces, this α angle between 0 °≤α≤29 °, 5 to 10 of the numbers of teeth.

The tooth profile angle β of pulling force tooth is a dynamically changeable, wherein the β angle in ° scope of 60 °＜β＜100,

Incision line between the initiating terminal of the end of upper strata tooth and lower floor's tooth is a dynamically changeable with respect to the angle theta between chain link two bottom surfaces, and wherein, the θ angle is between-90 °＜θ＜90 °, and the initial point of incision line is on any one side of chain link two bottom surfaces.

11, the described crawler belt that is provided with the liquid lubrication sealing arrangement of root a tree name claim 10 is characterized in that having between described M-N line one can make axle head chain link and cover end chain link move to make along the line vertical direction easy on and off of two centerline holes to be connected tooth and to realize combination and the hollow groove that separates.

12, the described crawler belt that is provided with the liquid lubrication sealing arrangement of root a tree name claim 1, it is characterized in that described connecting link is the integral type connecting link, comprise: the axle head endoporus and the cover end endoporus that are used for connecting link, expansion slot, wait upon the clothes tapped bore, the inwall definite length extended of at least one in described axle head endoporus and cover end endoporus of this expansion slot, but be used for the integral type connecting link is divided into the first and the second portion of relative displacement, this is waitd upon the clothes tapped bore and is located in the middle of two fastening screw keyholes in first's chain link, and axle shape spare inserts in described axle head endoporus and the cover end endoporus at least one.

13, the described crawler belt that is provided with the liquid lubrication sealing arrangement of root a tree name claim 12, it is characterized in that described integral type connecting link ended from the axle head inner hole wall beginning to cover end inner hole wall 10-50mm, or begin only to open an expansion slot to axle head inner hole wall 10-50mm from chain link cover end inner hole wall, the terminal point of expansion slot has finishing, the two ends of finishing are provided with and stop the hole

Described expansion slot and finishing are the combination of straight line, curve or straight line and curve, and described expansion slot is located on the line at center, two holes or in a side of the line of centres, the width of described expansion slot is 0.12mm-0.5mm,

The rubber seal that is used to protect screw thread is installed in the steady job groove of described circular clamp nut,

Described integral type connecting link is provided with one in order to the spill seal groove of 0 RunddichtringO to be installed along the circumferential surface of bearing pin endoporus, on the expansion slot of the bottom of spill seal groove and bearing pin endoporus coaxial direction, be provided with one at least in order to the manhole of rubber strip to be installed, transitional slot less than the manhole diameter is set between this manhole and bearing pin endoporus circumferential surface, described spill seal groove and manhole intersect, one end face of the sealing member in this manhole contacts with the bottom face of special-shaped elastic caoutchouc circle, the sealing member elastic caoutchouc circle outside in other end side and the spill seal groove contacts, elastic caoutchouc circle medial surface contacts with the outside face of bearing pin in the pin-and-hole and forms sealing

Be provided with the seal groove of the installation cone elastic rubber strip sealing member of a transitional slot along the circumferential surperficial overexpansion groove of described bearing pin endoporus place, one end of this cone elastic rubber strip sealing member contacts with the bottom face of described special-shaped elastic caoutchouc circle, and the inner surface of sealing member contacts with the outside face of bearing pin and forms sealing.

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