CN104118318A - Transformation method and device of transportation tank truck drive axle - Google Patents
Transformation method and device of transportation tank truck drive axle Download PDFInfo
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- CN104118318A CN104118318A CN201410296503.8A CN201410296503A CN104118318A CN 104118318 A CN104118318 A CN 104118318A CN 201410296503 A CN201410296503 A CN 201410296503A CN 104118318 A CN104118318 A CN 104118318A
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Abstract
The invention provides a transformation method of a transportation tank truck drive axle. The transformation method comprises the steps of calculating the speed ratio and selecting a drive axle according to the speed ratio, additionally arranging a wheel rim brake block circulating cooling system and fixing the drive axle through a drive axle hanging device. Correspondingly, the invention further provides the drive axle hanging device and the wheel rim brake block circulating cooling system. Accordingly, uniform upgrading and transformation of a drive axle and auxiliary components of an original transportation tank truck are achieved, and the drive axle is stable in connection and high in safety and can swing left and right by 10 degrees. In addition, the cooling system effectively lowers the temperature of a brake body, the service life of a friction plate is prolonged, stable operation of a brake system is ensured, and potential safety hazards are eliminated.
Description
Technical field
The invention belongs to transportation tank car relevant device technical field, relate to drive axle remodeling method and device on transportation tank car, especially relate to drive axle remodeling method and the device of Normet tank car.
Background technology
Our company introduced 4 same model Normet transportation tank car equipment respectively at 2003 and 2006 and is used for transporting cement concrete.Our company's iron ore tank car feature of travelling is, loaded vehicle and route are mainly towards the ramp of each supporting point of down-hole, the current ramp distance of our company's iron ore is about 5KM, so long distance, equipment deceleration and stopping performance is proposed to very test, and the planetary reduction gear bridge that the model that Normet tank car uses German Dana Corporation to produce is at present 176, the brake strip of this kind of model bridge does not have cooling-cycle device, cause long frequent the use after foot brake of travelling apart from ramp, brake temperature is high, be easy to burn out friction lining, cause deceleration and stopping performance to decline, bring potential safety hazard.And Normet company up to the present, do not take measures drive axle to do any transformation.
Summary of the invention
For solving the defect that in existing transportation tank car, planetary reduction gear bridge exists, our company iron ore is according to the experience of maintenance import extractive equipment for many years and improve spare parts domestically produced manufacturing process, proposition is carried out upgrading to tank car drive axle, consider the whole planetary reduction gear bridge of replacing on original tank car, this replaces the matching problem of bridge and original tank car driving system and the installation question of replacing bridge with regard to relating to, the present invention is directed to these problems transforms one by one, finally solved original transportation tank car drive axle because the upper and lower 15 degree gradients are often damaged the problems such as brought brake safe hidden danger.
In order to achieve the above object, the invention provides following technical scheme:
A remodeling method for transportation tank car drive axle, comprises the steps:
Step 1, according to the gear ratio calculation formula of primary speed-down and hub reduction: i0=i1 * i2, calculate the speed ratio of drive axle, according to the speed ratio calculating, select suitable drive axle, wherein i0 is overall gear ratio, i1 is that the transmitting ratio of first stage decelerator equals to coil number of teeth order and cone number of teeth object ratio, i2 is the transmitting ratio of wheel reduction gear, the ratio of i2=(1+ gear ring number and the sun wheel number of teeth);
Step 2, set up wheel limit brake facing circulating cooling system, increase Hydraulic Pump and back pressure valve, hydraulic oil in Hydraulic Pump enters the cooling friction lining in wheel limit under the effect of back pressure valve, when being installed, Hydraulic Pump utilizes the spare interface of engine pump, take the form of gear driven to drive Hydraulic Pump, foot brake valves is replaced with to elastic force foot brake valves;
Step 3, by drive axle suspension gear fixed drive bridge, front fixed mount assembly is welded by two front support seats and car body, rear fixed mount assembly welds by two rear support seats and car body, bridge is placed on abutment bracket, two bending pressing plates are pushed down to the supporter at two ends and alignd with the fixed orifice on abutment bracket, after being passed to the fixed orifice in the upper surface of bending pressing plate, bridge connecting element is fixedly connected with abutment bracket, thereby bridge is fixed on swing span, by swinging bearing pin, connects pendular body and fixed body.
Further, in described step 1, select the drive axle of speed ratio in [i0, i0+1] scope.
Further, described drive axle suspension gear comprises swing span, fixed mount and swing bearing pin, described swing span comprises abutment bracket, bending pressing plate and bridge connecting element, described bending pressing plate is two, symmetry is fixed on two of abutment bracket, bending pressing plate takes the shape of the letter U, two outward forms fixed end, described fixed end is fixedly connected with abutment bracket by fastener, described bridge connecting element is eight groups, four groups of bridge connecting elements are installed on each bending pressing plate, described bridge connecting element is fixedly connected with abutment bracket after passing the fixed orifice in the upper surface of bending pressing plate, pontic is fixed in swing span, described abutment bracket has two front rocking pin cover and the rear swing guidees that are oppositely arranged, and described front rocking pin cover and rear swing guide are coaxial, described fixed mount comprises front fixed mount assembly and rear fixed mount assembly, described front fixed mount assembly comprises front fixed mount and is fixedly connected on two front support seats of top, front fixed mount two ends, in described front fixed mount, be provided with front fixedly guide, described front support seat comprises front support base plate and the front supporting member that is welded on respectively front support base plate two ends, and described supporting seat below is welded with respectively reinforcement gusset, described rear fixed mount assembly comprises rear fixed mount and is fixedly connected on two rear support seats of top, rear fixed mount two ends, in described rear fixed mount, be provided with rear fixedly guide, the rear support part that described rear support seat comprises rear support base plate and is welded on rear support base plate top, described front fixedly guide and rear fixedly guide are coaxial, described swing bearing pin links together swing span and fixed mount through front fixedly guide, front rocking pin cover, rear swing guide and rear fixedly guide successively.
The present invention also provides a kind of drive axle suspension gear, comprise swing span, fixed mount and swing bearing pin, described swing span comprises abutment bracket, bending pressing plate and bridge connecting element, described bending pressing plate is two, symmetry is fixed on two of abutment bracket, bending pressing plate takes the shape of the letter U, two outward forms fixed end, described fixed end is fixedly connected with abutment bracket by fastener, described bridge connecting element is eight groups, four groups of bridge connecting elements are installed on each bending pressing plate, described bridge connecting element is fixedly connected with abutment bracket after passing the fixed orifice in the upper surface of bending pressing plate, pontic is fixed in swing span, described abutment bracket has two front rocking pin cover and the rear swing guidees that are oppositely arranged, and described front rocking pin cover and rear swing guide are coaxial, described fixed mount comprises front fixed mount assembly and rear fixed mount assembly, described front fixed mount assembly comprises front fixed mount and is fixedly connected on two front support seats of top, front fixed mount two ends, in described front fixed mount, be provided with front fixedly guide, described front support seat comprises front support base plate and the front supporting member that is welded on respectively front support base plate two ends, and described supporting seat below is welded with respectively reinforcement gusset, described rear fixed mount assembly comprises rear fixed mount and is fixedly connected on two rear support seats of top, rear fixed mount two ends, in described rear fixed mount, be provided with rear fixedly guide, the rear support part that described rear support seat comprises rear support base plate and is welded on rear support base plate top, described front fixedly guide and rear fixedly guide are coaxial, described swing bearing pin links together swing span and fixed mount through front fixedly guide, front rocking pin cover, rear swing guide and rear fixedly guide successively.
Further, described bridge connecting element comprises overbolt, nut, packing ring.
The present invention also provides a kind of wheel limit brake system with cooling mechanism, comprises Hydraulic Pump, back pressure valve, equalizer valve, the first foot brake valves, crus secunda brake activation valve, parking brake Dump valve, the cooling friction lining in wheel limit; Hydraulic oil from equalizer valve is awaited orders through the first foot brake valves and crus secunda brake activation valve inflow parking brake Dump valve, when parking brake Dump valve discharges, oil stream flows in the piston cylinder cavity of bridge, discharges brake, when operating personal is stepped on the first foot brake valves or crus secunda brake activation valve, high pressure oil in release piston cylinder cavity, flow in hydraulic reservoir, when there is emergency braking, manual or electromagnetic valve power down, parking brake Dump valve braking commutation, pours high pressure oil in fuel tank into; Hydraulic oil in described Hydraulic Pump enters the cooling friction lining in wheel limit under the effect of back pressure valve.
Beneficial effect:
The present invention has carried out unified upgrading to the drive axle of original transportation tank car and attachment component, has selected the drive axle that speed ratio is suitable, and has designed corresponding axle suspension, and drive axle stable connection, safe can be realized bridge left and right 10 degree and swing.In addition, for the braking brake block of bridge, set up cooling system, effectively reduced brake temperature, extended the service life of friction lining, guaranteed brake system smooth operation, eliminated safe hidden trouble.
Accompanying drawing explanation
Fig. 1 is brake fluid pressure oil circuit connection diagram;
Fig. 2 is the foot brake valves schematic diagram after replacing;
Fig. 3 is drive axle suspension gear birds-eye view;
Fig. 4 is that the A-A of Fig. 3 is to view;
Fig. 5 is the left side view of Fig. 3;
Fig. 6 is drive axle suspension gear scheme of installation.
Reference numerals list:
1-swing span, 11-abutment bracket, 12-bending pressing plate, 121-fixed end, 13-bridge connecting element, 14-bolt, rocking pin cover before 15-, rocking pin after 16-, 2-fixed mount, fixed mount assembly before 21-, fixed mount before 211-, 212-front support seat, the front fixedly guide of 213-, 214-front support base plate, 215-front supporting member, 216-strengthens gusset, fixed mount assembly after 22-, fixed mount after 221-, 222-rear support seat, fixing guide after 223-, 224-rear support base plate, 225-rear support part, 3-swings bearing pin.
The specific embodiment
Below with reference to specific embodiment, technical scheme provided by the invention is elaborated, should understands the following specific embodiment and only for the present invention is described, is not used in and limits the scope of the invention.
The present invention adopts following steps to carry out the transformation of transportation tank car drive axle:
Step 1, determining of speed ratio: the number of teeth difference of bridge for former transport trolley: differential disc number of teeth order is 33, finishing bevel gear cuter 9, connect the dish number of teeth 14, the planet number of teeth 27, sun wheel 13, gear ring 68, according to the gear ratio calculation formula of primary speed-down and hub reduction: i0=i1 * i2, wherein i0 is overall gear ratio, i1 is that the transmitting ratio of first stage decelerator equals to coil number of teeth order and cone number of teeth object ratio, i2 is the transmitting ratio of wheel reduction gear, computing formula is the ratio of i2=(1+ gear ring number and the sun wheel number of teeth), by calculating i0=22.8, should select speed ratio at [i, i+1] drive axle in scope, pass through type selecting, the speed ratio of the D912 of kelsser company series drive axle is 23, can meet the demands completely.
Step 2, because brake body is ceaselessly worked, cause friction lining temperature to rise, in order to reduce the temperature of brake body, guarantee the reliability of brake, the problem that there is no cooling-cycle device for the brake strip of original bridge, the present invention has set up a wheel limit brake facing cooling back installation, according to Kessler bridge producer, provide the required oil coolant flow of D912 series bridge at 15-20L/min, through Dui Beng producer, select, the MHP series flow of finally determining professional supplier Mai Ta Leix company (METARIS INC.) production of using Hydraulic Pump is 18L/min(2100r/min), can meet the requirement of system.During installation pump, utilize the spare interface of engine pump, take the form of gear driven to drive Hydraulic Pump.
As shown in Figure 1, whole brake fluid pressure oil circuit comprises Hydraulic Pump, back pressure valve D, equalizer valve, the first foot brake valves A, crus secunda brake activation valve B, parking brake Dump valve C, the cooling friction lining in wheel limit, from the hydraulic oil of equalizer valve through the first foot brake valves A and crus secunda brake activation valve B, flowing into parking brake Dump valve C awaits orders, after satisfying condition, parking brake Dump valve C discharges, and oil stream flows in the piston cylinder cavity E of bridge, discharges brake.When wanting brake, operating personal is stepped on service brake valve A or B, the high pressure oil in release piston cylinder cavity E, flow in hydraulic reservoir H, when there is emergency braking, manual or electromagnetic valve power down, parking brake Dump valve C brakes commutation, and high pressure oil is poured in fuel tank H.Wherein, cooling back installation cooling principle is as follows: from the hydraulic oil in gear type pump G, under the effect of the back pressure valve D of 0.1MPA, enter in the cooling friction lining in wheel limit.Safety arrestment mode due to the release of drive axle employing brake application by spring hydraulic pressure, with original equipment hydraulic braking, the brake principle that spring discharges is contrary, equipment is in normal work, and hydraulic oil must back down spring, discharges brake, so two foot brake valves in Fig. 1 also should change to brake activation valve as shown in Figure 2, because the bridge that adopts brake application by spring hydraulic pressure to discharge does not need parking brake cylinder, thus by this loop of parking brake Dump valve in former hydraulic diagram directly with change after foot brake valves dock, as shown in Figure 2.Owing to having adopted elastic force brake mode, make braking procedure safer reliable.
Step 3, the present invention has also designed a kind of drive axle suspension gear, has solved the installation question of drive axle, and drive axle suspension gear comprises two parts, swing span 1 and fixed mount 2, swing span is used for realizing drive axle left and right 10 degree and swings and be fixedly connected with frame; Fixed mount is for being fixed on drive axle in fixed mount 2, and swing span 1 and fixed mount 2 dock by fixed pin shaft.
Specifically, as Fig. 3, Fig. 4, shown in Fig. 5, described swing span 1 comprises abutment bracket 11, bending pressing plate 12 and bridge connecting element 13, described bending pressing plate 12 is two, symmetry is fixed on two of abutment bracket 11 for the supporter at fixed bridge two ends, bending pressing plate 12 takes the shape of the letter U, two outward forms fixed end 121, fixed end 121 is fixedly connected with abutment bracket 11 by bolt 14, bridge connecting element 13 is eight groups, four groups of bridge connecting element 13(are installed as shown in Figure 3 on each bending pressing plate 12), the bending pressing plate 12 of take is example, bridge supporter both sides are respectively arranged with two groups of bridge connecting elements 13, distance between two groups of bridge connecting elements 13 of bridge supporter both sides equals or is slightly larger than the width of the supporter at bridge two ends, after the fixed orifice that described bridge connecting element 13 passes in the upper surface (the direction is here as the criterion with the direction in Fig. 2) of bending pressing plate 12, be fixedly connected with abutment bracket 11, thereby pontic can be fixed in swing span.In Fig. 2, bridge connecting element 13 comprises overbolt, nut, packing ring.In the middle of abutment bracket 11, hollow out with bridge bottom surface and match, abutment bracket 11 also has two front rocking pin cover 15 and the rear swing guidees 16 that are oppositely arranged, and described front rocking pin cover 15 and rear rocking pin 16 covers are coaxial.Described fixed mount 2 comprises front fixed mount assembly 21 and rear fixed mount assembly 22, described front fixed mount assembly 21 comprises front fixed mount 211 and is fixedly connected on two front support seats 212 of front fixed mount 211 tops, two ends, in described front fixed mount 211, be provided with front fixedly guide 213, the triangle front supporting member 215 that described front support seat 212 comprises front support base plate 214 and is welded on respectively front support base plate 214 two ends, described front support seat 212 belows are welded with respectively strengthens gusset 216, described rear fixed mount assembly 22 comprises rear fixed mount 221 and is fixedly connected on two rear support seats 222 of top, rear fixed mount two ends, in described rear fixed mount 221, be provided with rear fixedly guide 223, the triangle rear support part 225 that described rear support seat 222 comprises rear support base plate 224 and is welded on rear support base plate 224 tops, triangle rear support part 225 is positioned at rear support base plate 224 midways location, described front fixedly guide 213 and rear fixedly guide 223 are coaxial, by swinging bearing pin 3 successively through front fixedly guide 213, front rocking pin cover 15, rear swing guide 16 and rear fixedly guide 223 link together swing span 1 and fixed mount 2.The bolt of mentioning in this example, nut, packing ring etc. are conventional fastener, and those skilled in that art also can adopt other conventional links to replace.
When this suspension gear is installed, as shown in Figure 6, front fixed mount assembly 21 is welded by two front support seats 212 and car body, rear fixed mount assembly 22 is by two rear support seats 222 and car body weld together, drive axle 4 is placed on abutment bracket 11, two bending pressing plates 12 are pushed down to the supporter at bridge two ends and alignd with the fixed orifice on abutment bracket 11, after overbolt in bridge connecting element 13 is passed to the fixed orifice in the upper surface of bending pressing plate, by nut, packing ring, be fixedly connected with abutment bracket 11, thereby bridge is fixed on swing span.By 12 swing bearing pins, connect pendular body and fixed body, realization swings.Integral installation process is simple and convenient, and Stability Analysis of Structures is firm.
The disclosed technological means of the present invention program is not limited only to the disclosed technological means of above-mentioned embodiment, also comprises the technical scheme being comprised of above technical characterictic combination in any.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (7)
1. a remodeling method for transportation tank car drive axle, is characterized in that, comprises the steps:
Step 1, according to the gear ratio calculation formula of primary speed-down and hub reduction: i0=i1 * i2, calculate the speed ratio of drive axle, according to the speed ratio calculating, select suitable drive axle, wherein i0 is overall gear ratio, i1 is that the transmitting ratio of first stage decelerator equals to coil number of teeth order and cone number of teeth object ratio, i2 is the transmitting ratio of wheel reduction gear, the ratio of i2=(1+ gear ring number and the sun wheel number of teeth);
Step 2, set up wheel limit brake facing circulating cooling system, increase Hydraulic Pump and back pressure valve, hydraulic oil in Hydraulic Pump enters the cooling friction lining in wheel limit under the effect of back pressure valve, when being installed, Hydraulic Pump utilizes the spare interface of engine pump, take the form of gear driven to drive Hydraulic Pump, foot brake valves is replaced with to elastic force foot brake valves;
Step 3, by drive axle suspension gear fixed drive bridge, front fixed mount assembly is welded by two front support seats and car body, rear fixed mount assembly welds by two rear support seats and car body, bridge is placed on abutment bracket, two bending pressing plates are pushed down to the supporter at two ends and alignd with the fixed orifice on abutment bracket, after being passed to the fixed orifice in the upper surface of bending pressing plate, bridge connecting element is fixedly connected with abutment bracket, thereby bridge is fixed on swing span, by swinging bearing pin, connects pendular body and fixed body.
2. the remodeling method of transportation tank car drive axle according to claim 1, is characterized in that: in described step 1, select the drive axle of speed ratio in [i0, i0+1] scope.
3. the remodeling method of transportation tank car drive axle according to claim 1 and 2, it is characterized in that: described drive axle suspension gear comprises swing span, fixed mount and swing bearing pin, described swing span comprises abutment bracket, bending pressing plate and bridge connecting element, described bending pressing plate is two, symmetry is fixed on two of abutment bracket, bending pressing plate takes the shape of the letter U, two outward forms fixed end, described fixed end is fixedly connected with abutment bracket by fastener, described bridge connecting element is eight groups, four groups of bridge connecting elements are installed on each bending pressing plate, described bridge connecting element is fixedly connected with abutment bracket after passing the fixed orifice in the upper surface of bending pressing plate, pontic is fixed in swing span, described abutment bracket has two front rocking pin cover and the rear swing guidees that are oppositely arranged, and described front rocking pin cover and rear swing guide are coaxial, described fixed mount comprises front fixed mount assembly and rear fixed mount assembly, described front fixed mount assembly comprises front fixed mount and is fixedly connected on two front support seats of top, front fixed mount two ends, in described front fixed mount, be provided with front fixedly guide, described front support seat comprises front support base plate and the front supporting member that is welded on respectively front support base plate two ends, and described supporting seat below is welded with respectively reinforcement gusset, described rear fixed mount assembly comprises rear fixed mount and is fixedly connected on two rear support seats of top, rear fixed mount two ends, in described rear fixed mount, be provided with rear fixedly guide, the rear support part that described rear support seat comprises rear support base plate and is welded on rear support base plate top, described front fixedly guide and rear fixedly guide are coaxial, described swing bearing pin links together swing span and fixed mount through front fixedly guide, front rocking pin cover, rear swing guide and rear fixedly guide successively.
4. a drive axle suspension gear, it is characterized in that: comprise swing span, fixed mount and swing bearing pin, described swing span comprises abutment bracket, bending pressing plate and bridge connecting element, described bending pressing plate is two, symmetry is fixed on two of abutment bracket, bending pressing plate takes the shape of the letter U, two outward forms fixed end, described fixed end is fixedly connected with abutment bracket by fastener, described bridge connecting element is eight groups, four groups of bridge connecting elements are installed on each bending pressing plate, described bridge connecting element is fixedly connected with abutment bracket after passing the fixed orifice in the upper surface of bending pressing plate, pontic is fixed in swing span, described abutment bracket has two front rocking pin cover and the rear swing guidees that are oppositely arranged, and described front rocking pin cover and rear swing guide are coaxial, described fixed mount comprises front fixed mount assembly and rear fixed mount assembly, described front fixed mount assembly comprises front fixed mount and is fixedly connected on two front support seats of top, front fixed mount two ends, in described front fixed mount, be provided with front fixedly guide, described front support seat comprises front support base plate and the front supporting member that is welded on respectively front support base plate two ends, and described supporting seat below is welded with respectively reinforcement gusset, described rear fixed mount assembly comprises rear fixed mount and is fixedly connected on two rear support seats of top, rear fixed mount two ends, in described rear fixed mount, be provided with rear fixedly guide, the rear support part that described rear support seat comprises rear support base plate and is welded on rear support base plate top, described front fixedly guide and rear fixedly guide are coaxial, described swing bearing pin links together swing span and fixed mount through front fixedly guide, front rocking pin cover, rear swing guide and rear fixedly guide successively.
5. drive axle suspension gear according to claim 4, is characterized in that: described bridge connecting element comprises overbolt, nut, packing ring.
6. a wheel limit brake system with cooling mechanism, is characterized in that: comprise Hydraulic Pump, back pressure valve, equalizer valve, the first foot brake valves, crus secunda brake activation valve, parking brake Dump valve, the cooling friction lining in wheel limit; Hydraulic oil from equalizer valve is awaited orders through the first foot brake valves and crus secunda brake activation valve inflow parking brake Dump valve, when parking brake Dump valve discharges, oil stream flows in the piston cylinder cavity of bridge, discharges brake, when operating personal is stepped on the first foot brake valves or crus secunda brake activation valve, high pressure oil in release piston cylinder cavity, flow in hydraulic reservoir, when there is emergency braking, manual or electromagnetic valve power down, parking brake Dump valve braking commutation, pours high pressure oil in fuel tank into; Hydraulic oil in described Hydraulic Pump enters the cooling friction lining in wheel limit under the effect of back pressure valve.
7. the wheel limit brake system with cooling mechanism according to claim 6, is characterized in that: described foot brake valves is elastic force foot brake valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410296503.8A CN104118318B (en) | 2014-06-27 | 2014-06-27 | Transformation method and device of transportation tank truck drive axle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410296503.8A CN104118318B (en) | 2014-06-27 | 2014-06-27 | Transformation method and device of transportation tank truck drive axle |
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| Publication Number | Publication Date |
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| CN104118318A true CN104118318A (en) | 2014-10-29 |
| CN104118318B CN104118318B (en) | 2017-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410296503.8A Active CN104118318B (en) | 2014-06-27 | 2014-06-27 | Transformation method and device of transportation tank truck drive axle |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111546882A (en) * | 2020-06-08 | 2020-08-18 | 山东岳华能源集团有限公司 | Road-rail dual-purpose six-wheel-drive traction locomotive and traction method |
| CN112177092A (en) * | 2020-10-21 | 2021-01-05 | 金川集团股份有限公司 | Swing span for underground scraper |
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| GB309142A (en) * | 1928-04-06 | 1930-05-01 | Anonima Automobili Ansaldo Soc | Improvements in or relating to driving axle suspension for motor vehicles |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB191313186A (en) * | 1913-05-24 | 1913-12-18 | James Yate Johnson | Improvements in Suspension Arrangements for Vehicles having Four or More Wheels. |
| GB309142A (en) * | 1928-04-06 | 1930-05-01 | Anonima Automobili Ansaldo Soc | Improvements in or relating to driving axle suspension for motor vehicles |
| CN2064331U (en) * | 1990-02-23 | 1990-10-24 | 郑世均 | Auto-water supply device for radiating of automobile braking |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111546882A (en) * | 2020-06-08 | 2020-08-18 | 山东岳华能源集团有限公司 | Road-rail dual-purpose six-wheel-drive traction locomotive and traction method |
| CN112177092A (en) * | 2020-10-21 | 2021-01-05 | 金川集团股份有限公司 | Swing span for underground scraper |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104118318B (en) | 2017-01-25 |
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