CN203381441U - Third-series axle assembly - Google Patents

Third-series axle assembly Download PDF

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Publication number
CN203381441U
CN203381441U CN201320424710.8U CN201320424710U CN203381441U CN 203381441 U CN203381441 U CN 203381441U CN 201320424710 U CN201320424710 U CN 201320424710U CN 203381441 U CN203381441 U CN 203381441U
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China
Prior art keywords
brake shoe
brake
cheek
shoe brake
pin
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Expired - Lifetime
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CN201320424710.8U
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Chinese (zh)
Inventor
吴志强
吴银初
黄志荣
徐志坚
刘伟权
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Guangdong Fuwa Engineering Manufacturing Co Ltd
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Guangdong Fuwa Engineering Manufacturing Co Ltd
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Priority to CN201320424710.8U priority Critical patent/CN203381441U/en
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Abstract

The utility model discloses a third-series axle assembly. The axle assembly comprises an axle head, an axle body, a hub and a brake drum, wherein the hub and the brake drum are connected and installed on the axle head; one end of a brake shoe is connected with a pin shaft inside a supporting pin hole; a cam shaft penetrates through a cam shaft installation hole and is contacted with a brake shoe roller at a free end of the brake shoe; inner and outer bearings are installed between the axle head and the hub and fixed through an axle head nut; a lock washer is arranged on one side of the axle head nut; the inner and outer bearings are arranged on one side of the lock washer; a groove cavity penetrating through the whole axle head nut and a pin shaft inserted in the groove cavity are arranged on the axle head nut; the pin shaft is sleeved with a pressure spring; the pressure spring is arranged inside the groove cavity, and one end of the pressure spring abuts against a flange of the pin shaft; and multiple holes are uniformly formed in a circumference, which corresponds to the pin shaft, of the lock washer, and diameters of the holes are matched with the diameter of the pin shaft. The axle assembly is excellent in performance and high in reliability.

Description

The 3rd family car axle assembly
Technical field
The utility model relates to trailer superimposed trailer parts technical field, specifically, relates to the axle unit of the 3rd series.
Background technology
As everyone knows, trailer axle is connected with vehicle frame by suspension, and trailer wheels is installed at two ends.Its function is to transmit all directions application force between vehicle frame and wheel.Trailer axle does not possess the driving function, and it mainly comprises brake assembly, wheel hub, axis body etc., and brake assembly is arranged on the spindle nose end of axletree, and spindle nose, through the central through hole of wheel hub, is fixed with axis head nut.Interior outer bearing and oil sealing are housed on axle head, for North America series axletree, European serial axletree, in it, the gap of outer bearing is by the axis head nut adjustment, generally adopt the way of Hui Song, two large spindle nose series of take is example, concrete method of operation is the spring cotter of taking apart on spindle nose, use the special-purpose anistree sleeve of axis head nut and torque-indicating wrench when rotating wheel hub fastening nut to the moment of torsion of stipulating (in the situation that there is no applicable torque-indicating wrench, till with the rotation of feel wheel hub, the braking sense slightly being arranged), then contrarotation axis head nut 1/7 encloses, by the cotter-pin hold of nut notch alignment spindle nose and insert spring cotter.The shortcoming of this adjustment mode is that the bearing space adjustment is inaccurate, adjusts precision not high, and end play is large, and end float misalignment is large, and bearing and spindle nose easily wear and tear, and the axletree life-span subtracts greatly, to driving vehicle, brings hidden danger.
On the other hand, the drum brake mechanism back-plate of current trailer axle is more loose with coordinating of camshaft, and when camshaft rotates, amplitude of fluctuation is larger, the stability deficiency, and the camshaft mounting hole end face of the S head of camshaft and back-plate easily interferes, cause braking failure.And the matching relationship of existing brake shoe brake cheek web and rest pin is free-running fit, after drg is often used, the gap of rest pin and web is larger, brake shoe brake cheek is slightly swung in brake wheel, thereby braking effect is caused to harmful effect.Moreover the indentation, there of brake shoe brake cheek in end is easier to wearing and tearing, need often change.
Moreover the wheel hub brake wheel is one of automobile important spare part, it acts on the automobile antero posterior axis, and support tire also rotates with tire.Existing wheel hub, brake wheel are all too thick and heavy, make rough-cast waste material, have increased manufacturing cost, and have not met the weight-saving requirement.
The utility model content
The purpose of this utility model is to overcome the deficiency of existing trailer semitrailer axle structure, and in conjunction with the advantage of first, second family car axle assembly, provide a kind of gap to adjust that precision is high, deceleration and stopping performance is excellent, lightweight, the 3rd family car axle assembly with Chinese characteristics, have high, the reliability and durability advantage of accuracy of manufacture.
The technical solution of the utility model is: the 3rd family car axle assembly, comprise spindle nose, axis body, wheel hub, brake wheel, back-plate and brake shoe brake cheek, camshaft, described wheel hub is connected with brake wheel and is arranged on spindle nose, be provided with supporting pin-and-hole and camshaft mounting hole on back-plate, one end of brake shoe brake cheek connects the bearing pin in the supporting pin-and-hole, camshaft through the camshaft mounting hole and with the free end of brake shoe brake cheek on the brake shoe brake cheek roller-contact, free end at brake shoe brake cheek is provided with retracing spring, in being equipped with between spindle nose and wheel hub, outer bearing, and by axis head nut, install fixing, one side of axis head nut is provided with stop washer, in a side of stop washer is provided with, outer bearing, described axis head nut is provided with the vallecular cavity that runs through whole axis head nut, with the bearing pin be inserted in described vallecular cavity, be arranged with pressure spring on bearing pin, described pressure spring is in described vallecular cavity, described pressure spring one end is resisted against on the flange of described bearing pin, evenly be provided with a plurality of holes on the circumference of the corresponding described bearing pin of described stop washer, diameter and the pin diameter in described hole are suitable.
The head of described bearing pin is provided with draw ring, radially is provided with pin-and-hole on described bearing pin, in described pin-and-hole, straight pin is set.
Described brake shoe brake cheek comprises brake shoe brake cheek bent plate and two brake shoe brake cheek webs, and described two brake shoe brake cheek webs are clamped in the bearing pin two ends in base plate body supporting pin-and-hole up and down; The end that connects bearing pin at described brake shoe brake cheek web arranges breach, and the shape of described breach and bearing pin is suitable.
The position of the corresponding breach in the outside of described two brake shoe brake cheek webs is provided with the reinforcement cushion block.
Described spindle nose is provided with step, and the inner ring of described neck bearing is resisted against on described step.
Described bearing pin comprises our department and end, in the middle of our department is positioned at, end is positioned at our department both sides, our department and end coaxial line, the external diameter of our department is greater than outer end diameter, our department insert in the supporting pin-and-hole of back-plate and with supporting pin-and-hole interference fit, the tip lengths of described bearing pin is longer than or is equaled described brake shoe brake cheek web and strengthen the pad thickness sum.
Described brake shoe brake cheek roller comprises brake shoe brake cheek roller wheel, brake shoe brake cheek roller axle, brake shoe brake cheek roller cover, described brake shoe brake cheek roller wheel is provided with the hollow mantle cavity, described brake shoe brake cheek roller is set in the hollow mantle cavity of brake shoe brake cheek roller wheel and is enclosed within on the excircle of described brake shoe brake cheek roller axle, so that brake shoe brake cheek roller wheel can rotate relative to the brake shoe brake cheek roller axle.
Compared with prior art, its beneficial effect is the utility model:
1) the utility model is provided with lash adjusting device on the axis head nut of axletree, and bearing space is controlled in a definite accuracy rating, and the clearance control precision is high, makes inside and outside bearing space adjust very convenient and accurate.The bearing pin of lash adjusting device inserts in the hole of stop washer when gap is adjusted, make axis head nut keep transfixion, therefore, can save the spring cotter for preventing that nut from rotating on existing axis head nut, thereby solve the problem of the difficult cleaning of axis head nut burr.
2) the utility model axis body base arrangement has strengthened existing camshaft and base plate camshaft mounting hole assembling length, make the base plate assembling on camshaft and axis body more firm, adjusted the mounting structure relation of brake shoe brake cheek and camshaft on the axis body base plate, strengthened the distance of camshaft mounting hole end face and brake shoe brake cheek central axis, the S head and the back-plate interference that prevent camshaft are played to positive role, make the braking procedure of drg more stable, camshaft rotates more stable, thereby has guaranteed the deceleration and stopping performance of drg.
3) brake shoe brake cheek structure of the present utility model, owing in the left and right outside, having welded the reinforcement cushion block, improved the intensity of indentation, there, strengthened the area of contact with bearing pin, more wear-resistant.Brake shoe brake cheek web and bearing pin interference fit, can save mounting bush, provides cost savings the double operation that reduces, and improved production efficiency.The brake shoe brake cheek roller changes three-piece construction into by single type, and brake shoe brake cheek roller wheel can roll along the cam curved surface of S head, has reduced the friction drag between brake shoe brake cheek roller and camshaft, makes braking sensitiveer effectively.
4) the utility model arranges many reinforced ribs between the hub body of wheel hub and width section, makes the hub body be connected and have enough intensity with width section, and the heavy seat at a plurality of attenuates of region division of corresponding reinforced rib at the internal face of width section simultaneously, to alleviate overall weight.Equally, the design of brake wheel flange portion hollow out, more meet the light-weight design principle.
The accompanying drawing explanation
Fig. 1 is the utility model fixed gap axis head nut scheme of installation.
Fig. 2 is the utility model fixed gap axis head nut front view.
Fig. 3 is the utility model fixed gap axis head nut side sectional view.
Fig. 4 is the utility model stop washer structural representation.
Fig. 5 is for being the utility model back-plate structural representation.
Fig. 6 is the lateral plan of Fig. 5.
Fig. 7 is the structural representation of brake shoe brake cheek.
Fig. 8 is the partial enlarged drawing of Fig. 7.
Fig. 9 is the structural representation of bearing pin.
Figure 10 is the assembly drowing of bearing pin roller.
Figure 11 is the structural representation of roller.
Figure 12 is the schematic diagram of roller wheel.
Figure 13 is the schematic diagram of roller axle.
Figure 14 is the schematic diagram of roller cover.
Figure 15 is the structural representation of camshaft.
Figure 16 is the mounting structure schematic diagram of camshaft.
Figure 17 is the shaft head structure schematic diagram.
Figure 18 is the wheel hub structure schematic diagram.
Figure 19 is the back view of Figure 18.
Figure 20 is the wheel hub structure cut-away view.
Figure 21 is the brake drum structure schematic diagram.
Figure 22 is the cut-away view of Figure 21.
The specific embodiment
Below pass through the specific embodiment, and the utility model is described in further detail by reference to the accompanying drawings.
The utility model discloses a kind of the 3rd family car axle assembly, comprise spindle nose, axis body, wheel hub, brake wheel, back-plate and brake shoe brake cheek, camshaft, wheel hub is connected with brake wheel and is arranged on spindle nose, back-plate is arranged on axis body, is provided with supporting pin-and-hole and camshaft mounting hole on it, camshaft pass the camshaft mounting hole and with the free end of brake shoe brake cheek on the brake shoe brake cheek roller-contact, inside and outside bearing is installed between spindle nose and wheel hub, and installs fixing by axis head nut.Below, set forth characteristics of the present utility model from the aspects such as mounting structure of the structure of axis head nut, drg, camshaft:
One, axis head nut bearing gap regulator
As shown in Figures 1 to 4, fixed gap axis head nut of the present utility model is arranged on the end of spindle nose, and interior outer bearing 4 also is installed on spindle nose 1, and wherein neck bearing is resisted against on axle journal, between interior outer bearing 4, with bearing seat, separate, wheel hub 2 free rotation ground supportings are on interior outer bearing 4.The negative thread of axis head nut 11 coordinates on the free end that is screwed to spindle nose with the outside thread of spindle nose, axis head nut be screwed into the tolerance clearance that the degree of depth is the inside and outside bearing of capable of regulating.The opening of wheel hub cover cap seal wheel hub 2, prevent that dust from entering the inside of wheel hub.
As shown in Figure 3, the front, the outside at outer bearing, be provided with stop washer 12, and the inner end surface of axis head nut 11 and stop washer 12 laminatings.As shown in Figure 4, be evenly distributed with 30 holes 19 on stop washer 12, the diameter in hole 19 and bearing pin 13 adapt, bearing pin 13 is arranged on the inside of axis head nut, specifically as shown in Figure 3, is provided with a vallecular cavity 18 on axis head nut, vallecular cavity 18 runs through the thickness of whole axis head nut 11, vallecular cavity is divided into two different chambers of internal diameter, and wherein the chamber of the larger and close stop washer of internal diameter is spring cavity, is provided with pressure spring 14 in spring cavity; The chamber of the less and close draw ring 16 of internal diameter is bearing pin chambeies.The outer end of bearing pin 13 is provided with draw ring 16, forms one thereon and is pulled outwardly the required operating surface of the axle of pulling pin.The other end of bearing pin is provided with a flange 17, the diameter of flange 17 and spring cavity internal diameter adapt, pressure spring 14 is set in outside bearing pin and is arranged in spring cavity, pressure spring one end is resisted against on the step end face that spring cavity and bearing pin chamber be connected to form, and the other end is resisted against a side of the flange 17 of bearing pin.When pressure spring is compressed, it has had the potential energy that flange is pushed open outward.Bearing pin is provided with pin-and-hole near an end of draw ring 16, and pin-and-hole radially arranges, and is inserted with straight pin 15 in pin-and-hole, also is provided with the positioning groove of straight pin 15 in the vallecular cavity of axis head nut, makes bearing pin remain in vallecular cavity.Under pressure spring is free state, the free end of bearing pin stretches out from vallecular cavity 18, and the thickness of its extension elongation and stop washer 12 is makeed an appointment, and the outside end face of flange 17 is concordant with the end face of axis head nut 11.
When axis body has been installed interior outer bearing, parts such as wheel hub with after axis head nut locking, use socket wrench specially adapted for it and torque-indicating wrench fastening nut when rotating wheel hub to arrive the moment of torsion 10-50Nm of regulation, preferred 15 Nm, then the draw ring on axis head nut is pulled out, the free end of bearing pin is retracted in the vallecular cavity of axis head nut, pressure spring is compressed has compression potential energy, then slow circumvolve axis head nut, make the relative stop washer rotation of end face of axis head nut, when axis head nut rotates the hole 19 to the free end of bearing pin over against stop washer, the free end of bearing pin no longer is subject to the prevention of stop washer 12 and drops on fully in the scope in hole 19, the compression potential energy of pressure spring transforms the kinetic energy of bearing pin, the free end of bearing pin inserts in the hole 19 of stop washer, axis head nut 11 can not rotate again.The negative thread pitch of axis head nut is designed to 2.117mm, and has been evenly arranged 30 holes on stop washer, and therefore, when draw ring is pulled out bearing pin and adjust the rotary gap of axis head nut, its precision is controlled and improved three times.
As another embodiment, in above-mentioned bearing space method of adjustment, axletree for different series, the step of adjusting the setting torque rating of axis head nut can be also such: when axis body has been installed interior outer bearing, parts such as wheel hub with after axis head nut locking, use socket wrench specially adapted for it and torque-indicating wrench to tighten axis head nut to moment of torsion 380Nm when rotating wheel hub, offset neck bearing in wheel hub to the free gap between axis head nut, guarantee that internal clearance is 0, and then axis head nut is returned to Song Yizhou (circle), take 380Nm as basis, suitably adjust forward or backward the regulation torque scope of its 15Nm with the torque-indicating wrench fastening nut.All the other steps and upper same.
Two, drg
Referring to Fig. 5-6, the axis body base plate is arranged on axis body, be the supporter of drg, comprise base plate body 20, the camshaft mounting hole 22 on the supporting pin-and-hole 21 on the central shaft hole 23 on the base plate body, the brake shoe brake cheek supporting end of base plate body, the camshaft end of base plate body.In figure, line of centers P is illustrated in the brake shoe brake cheek central axis on the brake shoe brake cheek supporting end of base plate body, H means the installation effective length of camshaft mounting hole, H is 62-68mm, and L means the distance of the brake shoe brake cheek central axis of described camshaft mounting hole the first end face and base plate body, and L is 35-38mm.
A pair of brake shoe brake cheek 6 is symmetricly set on the both sides (not shown) of base plate body, the brake shoe brake cheek structure is shown in Fig. 7-8, the right end of brake shoe brake cheek is connected to the bearing pin on brake shoe brake cheek supporting pin-and-hole, the other end is free end, a camshaft through the camshaft installation portion on the base plate body logical and with the free-ended roller-contact of brake shoe brake cheek.Brake shoe brake cheek is to swinging by bearing pin.
Brake shoe brake cheek 6 comprises brake shoe brake cheek bent plate 25 and two brake shoe brake cheek webs 24, and described two brake shoe brake cheek webs are clamped in the bearing pin two ends in base plate body supporting pin-and-hole up and down.Free end at brake shoe brake cheek is provided with retracing spring, and the bullet that resets is strained two brake shoe brake cheek, and roller is combined by S camming surface note of retracing spring and camshaft.The end that connects bearing pin at the brake shoe brake cheek web arranges breach 26, and breach 26 is suitable with the shape of bearing pin.The position of the corresponding breach in the outside of two brake shoe brake cheek webs is provided with strengthens cushion block 27.Strengthen cushion block 27 and be welded on breach 26, weld seam 28 is arranged along the outer rim of strengthening cushion block.
Referring to Fig. 9-10, bearing pin 7, for back-plate and the brake shoe brake cheek of drg, comprise that our department 31 of cylinder and end 32, our department are positioned at middle, its external diameter is greater than outer end diameter, end is positioned at our department both sides, our department and end coaxial line, and our department inserts in the supporting pin-and-hole of back-plate 5, and with supporting pin-and-hole interference fit, make bearing pin with back-plate 5 for being fixedly connected with.One end of two brake shoe brake cheek 6 is arranged on back-plate 5 by bearing pin respectively, and bearing pin and brake shoe brake cheek are for being rotationally connected.
The end extension design of bearing pin, its length is enough to pass from the supported end breach of brake shoe brake cheek, and passes the reinforcement cushion block 27 on brake shoe brake cheek supported end breach, thereby has increased support area and the length of brake shoe brake cheek, makes brake shoe brake cheek more firmly be difficult for swinging.As shown in the figure, the thickness setting of brake shoe brake cheek web and reinforcement cushion block is 8mm, and the tip lengths of bearing pin is greater than 16mm.
Referring to Figure 11-14, the brake shoe brake cheek roller 8 of brake assembly is three-piece construction, comprise brake shoe brake cheek roller wheel 33, brake shoe brake cheek roller axle 34, brake shoe brake cheek roller cover 35, brake shoe brake cheek roller cover 35 is linings, can be made by copper material, during assembling, on brake shoe brake cheek roller cover and brake shoe brake cheek roller axle, be coated with grease, the installation portion of brake shoe brake cheek roller axle is inserted in brake shoe brake cheek roller cover, then brake shoe brake cheek roller wheel is enclosed within on brake shoe brake cheek roller cover cylindrical.The two ends of brake shoe brake cheek roller axle are stuck on the brake shoe brake cheek web, brake shoe brake cheek roller wheel contacts with the S head of camshaft, can roll along the cam curved surface of S head, and, owing between brake shoe brake cheek roller wheel and brake shoe brake cheek roller axle, being provided with brake shoe brake cheek roller cover, make the brake shoe brake cheek roller axle rotation relatively of brake shoe brake cheek roller wheel, when implementing braking, even the brake shoe brake cheek roller axle is stuck in the brake shoe brake cheek web and can not rotates, brake shoe brake cheek roller wheel also can roll along the cam curved surface of S head, reduced the friction drag between brake shoe brake cheek roller and camshaft, made braking sensitiveer effectively.
Three, camshaft
In conjunction with Figure 15 and Figure 16, camshaft 9 comprises S 41 and bar section, the S head is connected with an end of bar section, in described bar section, an end of nearly S head is provided with the first connecting portion 42, described bar section is provided with the second connecting portion 43 and castellated shaft 44 away from an end of S head, is arranged with oil-containing lining 45, the oil-containing dust protecting cap 46 made by powder metallurgic method on described the first connecting portion.Described the first connecting portion 42 is quench zone with described the second connecting portion 43.The first connecting portion is for contacting with back-plate 5, and the second connecting portion is for contacting with oily globe bearing 47.Oil globe bearing 47 is made by powder metallurgic method.Described castellated shaft is involute splined shaft.The tooth section of described involute splined shaft is 37 teeth.The diameter of described bar section is 41mm.Camshaft is processed through mid frequency induction hardening through the position of back-plate and globe bearing, makes the wear resistance of camshaft, anti-fatigue performance strengthen.Also be arranged with dust protecting cap on camshaft, prevent that dust from entering between camshaft and back-plate.
Four, fit structure
Referring to Figure 17, the axis body of Trailer car shaft is divided into spindle nose 1 two large divisions at central siphon and two ends, neck bearing, outer bearing are installed between spindle nose 1 and wheel hub, the inner ring of neck bearing is fixed on the step 50 of spindle nose, and the fit structure of existing axle head step and neck bearing is unsatisfactory, and the contact width of spindle nose step and inner ring only has 2mm, bearing inner ring is is easily worn and torn, the long-term rear bearing gap of using becomes large, and interior outer bearing has the play phenomenon on spindle nose, and tire is is easily worn and torn.For this reason, the utility model is 5.8mm by the contact width of neck bearing inner ring and spindle nose step, than existing width wide more than 2 times.
Five, wheel hub brake wheel
As shown in Figure 18-20, wheel hub of the present utility model comprises hub body 51 and spoke 52, offer axial central through hole on the hub body, axial central through hole is in installing, outer bearing and axletree, axial central through hole is divided and is followed successively by wheel hub cover installing zone 61 by function from left to right, outer bearing installation region 62, transitional region 63, neck bearing installation region 64, cover of dust installation region 65, outer bearing installation region and neck bearing installation region are in installing, the outer cone coro bearng, their diameter is identical, transitional region, the hub cap installing zone, the aperture ratio bearing installation region of cover of dust installation region is slightly large.Spoke comprises heavy Zuo Neihuan district and spoke edge outer zone, and heavy Zuo Neihuan district connection hub body arranges a plurality of heavy seats 53 in heavy Zuo Neihuan district, heavy 53 installation side that caves in and be opened on neck bearing around the hub body; Spoke edge outer zone connects heavy Zuo Neihuan district, spoke edge outer zone is provided with petal-like erecting stage 54 in heavy seat open side, be provided with bolt hole 55 in each petal section of erecting stage, spoke edge outer zone is provided with thinning area at the homonymy of erecting stage, and described thinning area is that a wedge surface 58(who cuts from inside to outside is shown in Figure 18,20).
Be provided with ring-type in the junction in spoke edge outer zone and heavy Zuo Neihuan district protruding 57, the annular root of fin 57 connection platforms.In heavy Zuo Neihuan district, the opposite side of heavy seat opening is provided with the reinforced rib 56 that connects hub body and spoke edge outer zone.
Wheel hub of the present utility model is owing to being provided with heavy seat, alleviated the deadweight of wheel hub, at spoke edge outer zone, the circular fin set with the junction in heavy Zuo Neihuan district reaches the reinforced rib that is connected hub body and spoke edge outer zone in the opposite side setting of heavy seat opening, and the intensity of wheel hub is fully guaranteed.The more important thing is, heavy seat forms a controlled atmosphere structure, has promoted flowing of inner air, is conducive to the heat radiation of wheel hub.
Shown in Figure 21, Figure 22, brake wheel 3 comprises flange portion 76, bottom 77, tympanic part 78 and oral area 74, flange portion 76 is connected with the flange of wheel hub, bottom 77 butt flange sections 76 and tympanic part 78, junction is with arc transition, oral area 74 connects tympanic part 78, oral area 74 is openings of brake wheel, brake wheel is formed by casting manufacture, therefore the upper and lower mould die joint of existing brake wheel foundry mold is located on oral area,, for overall appearance, also need the outside face cutting to oral area after blank processes, end face is scabbled, thereby weakened the intensity of oral area.Given this, the utility model is located at the end face of oral area outer rim mouth at the upper and lower mould die joint of brake wheel rough-cast mould, and rough casting oral area outside face is not processed, and keeps the uppermost layer of casting density uniform and delicate, improves oral area intensity.
For the intensity that improves brake wheel keeps total weight and existing product simultaneously, maintain an equal level, the structural development of brake wheel is embodied in following a few part:
The local reinforcement designed.Brake wheel of the present utility model has been thickeied the thickness of flange portion 76, bottom 77, make more than flange portion 76, bottom 77 thickness have 14.5mm, in flange portion 76, with the intersection of bottom 77, be specifically thickened area 75, the thickness of oral area 74 is 1.7-2 times of tympanic part 78 mean thicknesss, the height of oral area 74 is 43-46mm, be brake wheel height 1/6-1/7 between.
The inner end surface of brake wheel 1 flange portion 76 is connected with the wheel hub end face, on flange portion 76, evenly decile arranges a plurality of bolt mounting holes 73, also be provided with hollow-out parts 72 between adjacent bolt mounting holes 73, hollow-out parts 72 designs for wall thickness reduction, the hollow out degree of depth is 4-5mm, is about half of flange portion 76 thickness.At flange portion hollow out attenuate, can reduce the brake wheel overall weight.
Six, brake spring pulling force design
Trailer axle is respectively arranged with shoe spring and retracing spring on brake shoe brake cheek, on the end of brake shoe brake cheek supporting pin-and-hole and free end, arrange respectively, shoe spring is for being connected and fixed two brake shoe brake cheek, brake-shoe return spring for making the brake shoe brake cheek homing when braking stops, good spring tension can solve trailer axle and drag once in a while the bad phenomenon of stopping, on the utility model the 3rd serial axletree, the initial tensile force of shoe spring has increased approximately 40% than existing design.And the initial tensile force of retracing spring has increased approximately 50% than existing design.When spring tension strengthens, can impel braking more steady, even travel on uneven highway section, good spring tension can make brake shoe brake cheek hold tightly securely on spindle nose, has overcome and has dragged the bad phenomenon of stopping.

Claims (7)

1. the 3rd family car axle assembly, comprise spindle nose, axis body, wheel hub, brake wheel, back-plate and brake shoe brake cheek, camshaft, described wheel hub is connected with brake wheel and is arranged on spindle nose, be provided with supporting pin-and-hole and camshaft mounting hole on back-plate, one end of brake shoe brake cheek connects the bearing pin in the supporting pin-and-hole, camshaft through the camshaft mounting hole and with the free end of brake shoe brake cheek on the brake shoe brake cheek roller-contact, free end at brake shoe brake cheek is provided with retracing spring, in being equipped with between spindle nose and wheel hub, outer bearing, and by axis head nut, install fixing, one side of axis head nut is provided with stop washer, in a side of stop washer is provided with, outer bearing, it is characterized in that: described axis head nut is provided with the vallecular cavity that runs through whole axis head nut, with the bearing pin be inserted in described vallecular cavity, be arranged with pressure spring on bearing pin, described pressure spring is in described vallecular cavity, described pressure spring one end is resisted against on the flange of described bearing pin, evenly be provided with a plurality of holes on the circumference of the corresponding described bearing pin of described stop washer, diameter and the pin diameter in described hole are suitable.
2. the 3rd family car axle assembly according to claim 1, it is characterized in that: the head of described bearing pin is provided with draw ring, radially is provided with pin-and-hole on described bearing pin, in described pin-and-hole, straight pin is set.
3. the 3rd family car axle assembly according to claim 1, it is characterized in that: described brake shoe brake cheek comprises brake shoe brake cheek bent plate and two brake shoe brake cheek webs, described two brake shoe brake cheek webs are clamped in the bearing pin two ends in base plate body supporting pin-and-hole up and down; The end that connects bearing pin at described brake shoe brake cheek web arranges breach, and the shape of described breach and bearing pin is suitable.
4. the 3rd family car axle assembly according to claim 3 is characterized in that: the position of the corresponding breach in the outside of described two brake shoe brake cheek webs is provided with the reinforcement cushion block.
5. the 3rd family car axle assembly according to claim 1, it is characterized in that: described spindle nose is provided with step, and the inner ring of described neck bearing is resisted against on described step.
6. the 3rd family car axle assembly according to claim 4, it is characterized in that: described bearing pin comprises our department and end, in the middle of our department is positioned at, end is positioned at our department both sides, our department and end coaxial line, the external diameter of our department is greater than outer end diameter, our department insert in the supporting pin-and-hole of back-plate and with supporting pin-and-hole interference fit, the tip lengths of described bearing pin is longer than or is equaled described brake shoe brake cheek web and strengthen the pad thickness sum.
7. the 3rd family car axle assembly according to claim 1, it is characterized in that: described brake shoe brake cheek roller comprises brake shoe brake cheek roller wheel, brake shoe brake cheek roller axle, brake shoe brake cheek roller cover, described brake shoe brake cheek roller wheel is provided with the hollow mantle cavity, described brake shoe brake cheek roller is set in the hollow mantle cavity of brake shoe brake cheek roller wheel and is enclosed within on the excircle of described brake shoe brake cheek roller axle, so that brake shoe brake cheek roller wheel can rotate relative to the brake shoe brake cheek roller axle.
CN201320424710.8U 2013-07-17 2013-07-17 Third-series axle assembly Expired - Lifetime CN203381441U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320424710.8U CN203381441U (en) 2013-07-17 2013-07-17 Third-series axle assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320424710.8U CN203381441U (en) 2013-07-17 2013-07-17 Third-series axle assembly

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Publication Number Publication Date
CN203381441U true CN203381441U (en) 2014-01-08

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Application Number Title Priority Date Filing Date
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103317969A (en) * 2013-07-17 2013-09-25 广东富华工程机械制造有限公司 Third-series axle assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103317969A (en) * 2013-07-17 2013-09-25 广东富华工程机械制造有限公司 Third-series axle assembly
CN103317969B (en) * 2013-07-17 2015-11-04 广东富华工程机械制造有限公司 3rd family car axle assembly

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