CN203902662U - Wheeled heavy-duty vehicle and steering rocker device thereof - Google Patents
Wheeled heavy-duty vehicle and steering rocker device thereof Download PDFInfo
- Publication number
- CN203902662U CN203902662U CN201420252810.1U CN201420252810U CN203902662U CN 203902662 U CN203902662 U CN 203902662U CN 201420252810 U CN201420252810 U CN 201420252810U CN 203902662 U CN203902662 U CN 203902662U
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- Prior art keywords
- rocker
- pitman arm
- sleeve
- arm
- pitman
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Abstract
The utility model discloses a steering rocker device comprising a first steering pull bar (1), a second steering pull bar (2), a steering rocker (3) and a rocker support (4). The steering rocker (3) comprises a first rocker (31), a second rocker (32) and a sleeve(33); the steering rocker (3) is mounted on the rocker support (4) through the sleeve (3); both the first rocker (31) and the second rocker (32) are straight arms; the first rocker (31) is fixed at one end of the sleeve (33); the second rocker (32) is fixed at the other end of the sleeve (33). The steering rocker device is high in load bearing capacity, rarely cracks, is long in service and is easy to process and manufacture, processing precision is easy to control; when a wheeled heavy-duty vehicle with great changes in frame transverse-sectional width experiences alternating load action, the steering rocker device still ensures rigidity and stability of a steering system. The utility model further discloses the wheeled heavy-duty vehicle with the steering rocker device.
Description
Technical field
The utility model relates to technical field of engineering machinery, particularly the pitman arm device of the heavy-duty vehicle such as wheel crane.The utility model also relates to the wheeled heavy-duty vehicle that is provided with described pitman arm device.
Background technology
For wheeled heavy-duty vehicle, the effect of pitman arm device be from divertical motion, power or the torque drive of bearing circle to wheel flutter promote wheel flutter deflection to.
Vehicle in the process of moving, the power on pitman arm device of being applied to has the power that steering hydraulic power-assisted provides, resistance or the resistance distance that stops steered wheel to turn to from ground, and through tire, steeraxle, steering track rod assembly, is delivered to the power of pitman arm device when a certain wheel flutter runs into the impact that obstacle produces.Therefore, the intensity of pitman arm device, rigidity, stability, not only want to make vehicle normally travel in flat road surface, but also will be enough to tackle various road surfaces emergency case.
The reliability of pitman arm device, is being related to the reliability of Vehicle Driving Cycle.If pitman arm device design is improper, very likely occur rocker arm support fracture, pitman arm device from frame web tear, the phenomenon of the failure such as pitman arm distortion, and then affect the steering angle precision of each wheel flutter and the rigidity of steering swivel system.
Please refer to Fig. 1, Fig. 2, Fig. 1 is the partial schematic diagram of vehicle frame for a kind of wheeled heavy-duty vehicle; Fig. 2 is the birds-eye view of Fig. 1.
As shown in the figure, the vehicle frame of wheeled heavy-duty vehicle is the carrying structure of vehicle, mainly comprise front section of vehicle frame 1 ＇, fixed supporting leg 2 ＇, the parts such as vehicle frame back segment 3 ＇, in order to transmit steering hydraulic power-assisted according to direction initialization, pitman arm device is generally by the first steering track rod 4 ＇, pitman arm 5 ＇, rocker arm support 6 ＇, the formations such as the second steering track rod 7 ＇, the first steering track rod 4 ＇ are substantially parallel with the second steering track rod 7 ＇, but both spatially have longitudinal diff-H dislocation in the horizontal, hinged with lower end and the upper end of pitman arm 5 ＇ respectively, pitman arm 5 ＇ are arranged on frame web by rocker arm support 6 ＇ are rotating, when the first steering track rod 4 ＇ seesaw, by pitman arm 5 ＇, drive the second steering track rod 7 ＇ counter motions, thereby the transmission of realizable force.
According to actual use experience, for front section of vehicle frame section width and vehicle frame back segment section width, differ larger vehicle frame (H value is larger), the mode that pitman arm device is arranged on vehicle, particularly crucial to the safety of Vehicle Driving Cycle and turning efficiency.
Please refer to Fig. 3, Fig. 3 is the structural representation of a kind of pitman arm device in prior art.
This is the pitman arm assembly that a kind of wheeled heavy-duty vehicle is conventional, its pitman arm 11 ＇ have certain bending height H; rocker arm support 12 ＇ are connected with frame web 13 ＇ by the mode of welding; packing ring 14 ＇ are connected by the mode of welding with pitman arm 11 ＇; packing ring 14 ＇, pitman arm 11 ＇ are connected by a pair of conical bearing 15 ＇ with rocker arm support 12 ＇, and the mode that bearing cap shim 16 ＇ are bolted is connected with rocker arm support 12 ＇.
This version, usings tapered roller bearing as transmission, and friction drag is little, long service life.But, because pitman arm 11 ＇ are bending part, therefore there is following shortcoming: one, bending part exists stress to a certain degree to concentrate, and compares with non-bending rocking arm, and under the impact of reverse load, its bearing load is little, bending part is easy to crack, service life is short; Its two, compare with non-bending arm, processing technology is complicated, for the pitman arm that is difficult to bending, sometimes needs mold, cost is higher; Its three, the parallelism between the face after bending and the face of non-bending is poor, is difficult for accurately controlling.
Please refer to Fig. 4, Fig. 5, Fig. 4 is the structural representation of the second pitman arm device in prior art; Fig. 5 is the structural representation of the third pitman arm device in prior art.
Granted publication number is that the utility model patent of CN202657098U is complicated at the buckle structure shown in Fig. 4, part tolerance quality of fit is high, manufacture on the basis of the rocker arrangement that assembly difficulty is large, pitman arm device shown in a kind of Fig. 5 is disclosed, it comprises pitman arm 21 ＇, rocker arm support 22 ＇, bearing 23 ＇ between pitman arm 21 ＇ and rocker arm support 22 ＇, rocker arm cover 24 ＇, prevent the buckle structure that bearing is altered outward, compare with Fig. 4, structure shown in Fig. 5 arranges buckle structure in the periphery of bearing 23 ＇, pitman arm 21 ＇ are fixed to the periphery at bearing 23 ＇, simplified the buckle structure of pitman arm device, reduced the requirement to assembly precision.
Yet, no matter be the pitman arm device shown in Fig. 3 or Fig. 4, Fig. 5, all adopt the rocker shaft being welded on frame web to support pitman arm as rocker arm support, because rocker shaft one end is fixing, form afterwards cantilever beam structure and length shorter, therefore its moment of flexure of bearing, torque load can be concentrated and act on root and web, easily there is the problems such as rocker shaft ruptures in shaft shoulder portion, the related frame web of rocker arm support is torn, have a strong impact on normally travelling of vehicle.
Therefore, how pitman arm device being optimized to design, to eliminate above-mentioned defect, is those skilled in the art's technical issues that need to address.
Utility model content
The first object of the present utility model is to provide a kind ofly can carry that certain moment of torsion, intensity and toughness are large, the pitman arm device of good stability.
The second object of the present utility model is to provide the wheeled heavy-duty vehicle that is provided with described pitman arm device.
For realizing above-mentioned the first object, the utility model provides a kind of pitman arm device, comprises the first steering track rod, the second steering track rod, pitman arm and rocker arm support; Described pitman arm comprises the first rocking arm, the second rocking arm and sleeve, and is installed on described rocker arm support by described sleeve; Described the first rocking arm and the second rocking arm are straight-arm, and described the first rocking arm is fixed on described sleeve one end, and described the second rocking arm is fixed on the described sleeve other end.
Preferably, described rocker arm support is box type construction, which is provided with coaxial axis hole; The sleeve of described pitman arm is installed on described axis hole by bearing pin.
Preferably, the two ends of described sleeve are provided with the stepped hole of hole enlargement, and bearing or the lining matching with bearing pin is set in it.
Preferably, described rocker arm support is connected in fixed supporting leg or the front section of vehicle frame of vehicle frame.
Preferably, described rocker arm support comprises the first side plate triangular in shape and the second side plate, and its drift angle place offers respectively described axis hole; Between described the first side plate and the second side plate, be provided with both are connected as a single entity and form " V " shape stay bearing plate of box type construction.
Preferably, between described pitman arm and rocker arm support, be provided with adjusting pad.
Preferably, described rocker arm support is rocker shaft, and its fixed end is connected in frame web, the sleeve normal-running fit of its overhanging section and described pitman arm; The fineness ratio of described overhanging section is 1:4～1:6.
Preferably, the diameter of described fixed end is greater than described overhanging section; The diameter of described overhanging section successively decreases gradually from root terminad.
Preferably, between the root of described overhanging section and end and described sleeve, be provided with clutch shaft bearing and the second bearing, and the specification of described clutch shaft bearing is greater than described the second bearing.
For realizing above-mentioned the second object, the utility model provides a kind of wheeled heavy-duty vehicle, comprise vehicle frame and pitman arm device, described vehicle frame comprises front section of vehicle frame, fixed supporting leg and vehicle frame back segment, and described pitman arm device is the pitman arm device described in above-mentioned any one.
The pitman arm device that the utility model provides has been done further improvement to pitman arm, it is no longer the bending arm of integral type, but by the first rocking arm, the second rocking arm and sleeve segmentation form, its middle sleeve is for being rotationally connected with rocker arm support, the first rocking arm and the second rocking arm are straight-arm, be individually fixed in the two ends of sleeve, be used for connecting the first steering track rod and the second steering track rod, the first rocking arm, the second rocking arm and sleeve can be distinguished independent processing and manufacturing, then by techniques such as welding, be assembled into pitman arm, after assembling, it is still satisfied required " bending " shape of hydraulic booster of transmitting on the whole, but compare with Integral refractive curved boom, owing to having avoided employing bending technique, therefore there is not the stress concentration phenomenon causing because of bending in pitman arm, not only bearing load is large, not easy to crack, long service life, and be easy to processing and manufacturing and controlled working precision.
The wheeled heavy-duty vehicle that the utility model provides is provided with described pitman arm device, and because described pitman arm device has above-mentioned technique effect, the wheeled heavy-duty vehicle that is provided with this pitman arm device also possesses corresponding technique effect.
Accompanying drawing explanation
Fig. 1 is the partial schematic diagram of vehicle frame for a kind of wheeled heavy-duty vehicle;
Fig. 2 is the birds-eye view of Fig. 1;
Fig. 3 is the structural representation of a kind of pitman arm device in prior art;
Fig. 4 is the structural representation of the second pitman arm device in prior art;
Fig. 5 is the structural representation of the third pitman arm device in prior art;
Fig. 6 provides the structural representation of a kind of specific embodiment of pitman arm device for the utility model;
Fig. 7 provides the structural representation of the another kind of specific embodiment of pitman arm device for the utility model.
In Fig. 1 to Fig. 5:
Front section of vehicle frame 1 ＇ fixed supporting leg 2 ＇ vehicle frame back segment 3 ＇ first steering track rod 4 ＇ pitman arm 5 ＇ rocker arm support 6 ＇ the second steering track rod 7 ＇
Pitman arm 11 ＇ rocker arm support 12 ＇ frame web 13 ＇ packing ring 14 ＇ conical bearing 15 ＇ bearing cap shim 16 ＇
Pitman arm 21 ＇ rocker arm support 22 ＇ bearing 23 ＇ rocker arm cover 24 ＇
In Fig. 6, Fig. 7:
1. the first steering track rod 2. second steering track rod 3. pitman arm 31. first rocking arm 32. second rocking arm 33. sleeve 4. rocker arm support 41. fixed end 42. overhanging section 5. front section of vehicle frame 6. fixed supporting leg 7. vehicle frame back segment 8. bearing pin 91. antifriction-bearing box 92. conical bearings
The specific embodiment
In order to make those skilled in the art person understand better the utility model scheme, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Please refer to Fig. 6, Fig. 6 provides the structural representation of a kind of specific embodiment of pitman arm device for the utility model.
As shown in the figure, in one embodiment, the pitman arm device that the utility model provides, main by the first steering track rod 1, the second steering track rod 2, pitman arm 3 and the rocker arm support 4 that is used for supporting pitman arm 3 form.
Fixing front section of vehicle frame 5, fixed supporting leg 6 and the vehicle frame back segment 7 of mode that vehicle frame has to weld, rocker arm support 4 is arranged on fixed supporting leg 6, and it is box-structure on cross-sectional plane, at least has two coaxial axis holes.
The support that rocker arm support 4 is box type construction, the first side plate and second side plate of its both sides are triangular in shape, and at drift angle place, offer two coaxial axis holes, " V " shape stay bearing plate between the first side plate and the second side plate is by both formation box type constructions that is connected as a single entity, on the web that is welded on fixed supporting leg 6 of whole support.
Pitman arm 3 is formed by the first rocking arm 31, the second rocking arm 32 and sleeve 33 3 part assembly weldings, the first rocking arm 31 and the second rocking arm 32 are straight-arm, the first rocking arm 31 is welded on sleeve 33 left ends, the second rocking arm 32 is welded on sleeve 33 right-hand members, the first steering track rod 1 and the first rocking arm 31 are hinged by ball end, and the second steering track rod 2 and the second rocking arm 32 are also hinged by ball end.
The sleeve 33 of pitman arm 3 is arranged between the axis hole of rocker arm support 4 by bearing pin 8, pitman arm 3 can rotate with respect to rocker arm support 4, during work, the first steering track rod 1 moves forward and backward under the drive of bearing circle, drive pitman arm 3 rotations, and then drive the second steering track rod 2 to move forward and backward, realize the transmission of hydraulic booster.
Particularly, the two ends of sleeve 33 are provided with the stepped hole of hole enlargement, stepped hole built-in wear-resisting, corrosion stability are good, the bearing that can work under higher load, medium sliding velocity or lining are (due to hiding relation, not shown), match with bearing pin 8 on rocker arm support 4, guarantee that pitman arm 3 can rotate with respect to rocker arm support 4.
In order to improve the positioning precision of pitman arm 3 on rocker arm support 4, can between pitman arm 3 and rocker arm support 4, adjusting pad be set.
It is pointed out that rocker arm support 4 except being arranged on fixed supporting leg 6 webs, also can be connected with front section of vehicle frame 5 in the mode of welding.
Above-mentioned pitman arm 3 adopts segmentation structure, replace Integral refractive curved boom, its first rocking arm 31, the second rocking arm 32 and sleeve 33 can be distinguished independent processing and manufacturing, then by techniques such as welding, be assembled into pitman arm, after assembling, be still on the whole to meet and transmit required " bending " shape of hydraulic booster.But compare with Integral refractive curved boom, owing to having avoided employing bending technique, simplified greatly processing process, there is not the stress concentration phenomenon causing because of bending, not only bearing load greatly, not easy to crack, long service life, and be easy to processing and manufacturing and controlled working precision.
And; rocker arm support 4 adopts the rack form that is provided with coaxial axis hole; replace existing rocker arm support; its load-carrying capacity is strong; can guarantee reliability and the rigidity of steering swivel system; solved the stressed not good limitation of beam type rocker arm support, on the large wheeled heavy-duty vehicle of vehicle frame lateral cross section change width, be subject to reverse load to do the used time, still can guarantee rigidity and the stability of steering swivel system.
Please refer to Fig. 7, Fig. 7 provides the structural representation of the another kind of specific embodiment of pitman arm device for the utility model.
As shown in the figure, in another specific embodiment; rocker arm support 4 is rocker shaft; the diameter of its fixed end 41 is greater than overhanging section 42, and the diameter of overhanging section 42 successively decreases gradually from root terminad, and fixed end 41 is connected in frame web; between the root of overhanging section 42 and sleeve 33, be provided with the antifriction-bearing box 91 of a large specification; between end and sleeve 33, be provided with the conical bearing 92 of a small dimension, and to realize being rotationally connected of rocker shaft and pitman arm 3, the concrete structure of pitman arm 3 is referring to above.
Although the rocker arm support 4 in this embodiment is beam type structure, but its root by overstriking rocker shaft, the mode of successively decreasing from root terminad diameter, improve the intensity of its root and the working stability of bearing, the fineness ratio of its overhanging section 42 is 1:4～1:6, can bear larger axial force and diametral load, thereby the axle head fracture, the rocker arm support 4 that have reduced rocker arm support 4 are torn the risk of snapping from frame web.
Above-described embodiment is only preferred version of the present utility model, is specifically not limited to this, can make according to actual needs pointed adjustment on this basis, thereby obtains different embodiments.For example, the sleeve 33 of pitman arm 3 is rotationally connected etc. by other forms and rocker arm support 4.Because mode in the cards is more, casehistory no longer one by one just here.
The utility model provides a kind of wheeled heavy-duty vehicle, comprise vehicle frame and pitman arm device, described vehicle frame comprises front section of vehicle frame 5, fixed supporting leg 6 and vehicle frame back segment 7, and described pitman arm device is pitman arm device mentioned above, all the other structures please refer to prior art, just repeat no more.
Above wheeled heavy-duty vehicle provided by the utility model and pitman arm device thereof are described in detail.Applied specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment is just for helping to understand core concept of the present utility model.Should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (10)
1. a pitman arm device, comprises the first steering track rod (1), the second steering track rod (2), pitman arm (3) and rocker arm support (4); It is characterized in that, described pitman arm (3) comprises the first rocking arm (31), the second rocking arm (32) and sleeve (33), and is installed on described rocker arm support (4) by described sleeve (3); Described the first rocking arm (31) and the second rocking arm (32) are straight-arm, and described the first rocking arm (31) is fixed on described sleeve (33) one end, and described the second rocking arm (32) is fixed on described sleeve (33) other end.
2. pitman arm device according to claim 1, is characterized in that, described rocker arm support (4) is box type construction, which is provided with coaxial axis hole; The sleeve (33) of described pitman arm (3) is installed on described axis hole by bearing pin (8).
3. pitman arm device according to claim 2, is characterized in that, the two ends of described sleeve (33) are provided with the stepped hole of hole enlargement, and bearing or the lining matching with bearing pin is set in it.
4. pitman arm device according to claim 3, is characterized in that, described rocker arm support (4) is connected in fixed supporting leg (6) or the front section of vehicle frame (5) of vehicle frame.
5. pitman arm device according to claim 2, is characterized in that, described rocker arm support (4) comprises the first side plate triangular in shape and the second side plate, and its drift angle place offers respectively described axis hole; Between described the first side plate and the second side plate, be provided with both are connected as a single entity and form " V " shape stay bearing plate of box type construction.
6. according to the pitman arm device described in claim 1 to 5 any one, it is characterized in that, between described pitman arm (3) and rocker arm support (4), be provided with adjusting pad.
7. pitman arm device according to claim 1, it is characterized in that, described rocker arm support (4) is rocker shaft, and its fixed end (41) is connected in frame web, sleeve (33) normal-running fit of its overhanging section (42) and described pitman arm (3); The fineness ratio of described overhanging section (42) is 1:4～1:6.
8. pitman arm device according to claim 7, is characterized in that, the diameter of described fixed end (41) is greater than described overhanging section (42); The diameter of described overhanging section (42) successively decreases gradually from root terminad.
9. pitman arm device according to claim 8, it is characterized in that, between the root of described overhanging section (42) and end and described sleeve (33), be provided with clutch shaft bearing and the second bearing, and the specification of described clutch shaft bearing is greater than described the second bearing.
10. a wheeled heavy-duty vehicle, comprise vehicle frame and pitman arm device, described vehicle frame comprises front section of vehicle frame (5), fixed supporting leg (6) and vehicle frame back segment (7), it is characterized in that, described pitman arm device is the pitman arm device described in the claims 1 to 9 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420252810.1U CN203902662U (en) | 2014-05-16 | 2014-05-16 | Wheeled heavy-duty vehicle and steering rocker device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420252810.1U CN203902662U (en) | 2014-05-16 | 2014-05-16 | Wheeled heavy-duty vehicle and steering rocker device thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203902662U true CN203902662U (en) | 2014-10-29 |
Family
ID=51776949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420252810.1U Expired - Fee Related CN203902662U (en) | 2014-05-16 | 2014-05-16 | Wheeled heavy-duty vehicle and steering rocker device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203902662U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104512460A (en) * | 2014-12-30 | 2015-04-15 | 徐州重型机械有限公司 | Steering arm component, steering mechanism and multi-axis steering wheel type overload vehicle |
| WO2020114470A1 (en) * | 2018-12-06 | 2020-06-11 | 浙江盘毂动力科技有限公司 | Automobile steering transmission mechanism, automobile steering system, and long front suspension automobile |
-
2014
- 2014-05-16 CN CN201420252810.1U patent/CN203902662U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104512460A (en) * | 2014-12-30 | 2015-04-15 | 徐州重型机械有限公司 | Steering arm component, steering mechanism and multi-axis steering wheel type overload vehicle |
| EP3241722A4 (en) * | 2014-12-30 | 2018-10-03 | Xuzhou Heavy Machinery Co., Ltd. | Rotating rocker arm assembly, rotating mechanism and multi-axis rotating wheel-type heavy-duty vehicle |
| US10583860B2 (en) | 2014-12-30 | 2020-03-10 | Xuzhou Heavy Machinery Co., Ltd. | Steering arm assembly, steering mechanism and multi-axle steering wheel type heavy duty vehicle |
| WO2020114470A1 (en) * | 2018-12-06 | 2020-06-11 | 浙江盘毂动力科技有限公司 | Automobile steering transmission mechanism, automobile steering system, and long front suspension automobile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 |