CN104380924A - Crawler-type combined harvester drive axle - Google Patents
Crawler-type combined harvester drive axle Download PDFInfo
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- CN104380924A CN104380924A CN201410679495.5A CN201410679495A CN104380924A CN 104380924 A CN104380924 A CN 104380924A CN 201410679495 A CN201410679495 A CN 201410679495A CN 104380924 A CN104380924 A CN 104380924A
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- clutch
- ripple pearl
- clutch hub
- ripple
- plate
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Abstract
The invention discloses a crawler-type combined harvester drive axle. The crawler-type combined harvester drive axle comprises a drive wheel (1), a drive gear (2) and drive half axles (3) located on the two ends of the drive gear (2), wherein one end of each drive half axle (3) is connected with the drive wheel (1) while the other end thereof is connected with a drive gear (2); the crawler-type combined harvester drive axle is characterized in that each drive half axle (3) is provided with a metras clutch hub (9) and a brake system, each metras clutch hub (9) controls each drive half axle (3) to rotate along with the drive gear (2) or separate from the drive gear (2), and a clutch wave plate (11) on each metras clutch hub (9) moves to control the brake of the brake system. As a shifting fork only needs to be arranged on each clutch wave plate, the operating system is simple and the operation is flexible.
Description
Technical field
The present invention relates to a kind of driving bridge for crawler-type combine.
Background technology
The drive axle be widely used in now on combine is developed on workers and peasants-12 speed changing box for walking tractor basis, there is clutch and brake steering not steady.The clutch hub of existing drive axle is not arranged on jack shaft in addition, and is mounted on gear housing, and brake is arranged on jack shaft, so need two shift forks, one for clutch, one for braking, troublesome poeration, dumb, the controllability of radius of turn is poor.
Summary of the invention
For existing problem, the object of the present invention is to provide a kind of driving bridge for crawler-type combine of flexible operation.
To achieve these goals, technical scheme of the present invention is: a kind of driving bridge for crawler-type combine, comprise driving wheel (1), driven wheel (2) and be positioned at the jack shaft (3) at driven wheel (2) two ends, one end of described jack shaft (3) is connected with driving wheel (1), the other end is connected with driven wheel (2), it is characterized in that: on jack shaft (3), be provided with ripple pearl clutch and braking system simultaneously, described ripple pearl clutch controls jack shaft (3) and rotates along with driven wheel (2) or depart from driven wheel (2), brake system is controlled by the mobile of the clutch ripple dish (11) on ripple pearl clutch.
Concrete structure is:
Described jack shaft (3) is arranged in semiaxis sleeve (5) by bearing (4), and, the two ends of described jack shaft (3) all reach semiaxis sleeve (5) outward, one end of described jack shaft (3) is connected with driving wheel (1), (2) are provided with centre bore to described driven wheel vertically, the two ends of described driven wheel (2) are provided with ripple pearl clutch hub installing hole (2a) that aperture is greater than centre bore, the center line of described ripple pearl clutch hub installing hole (2a) and the center line of centre bore are on the same line, the hole wall of described ripple pearl clutch hub installing hole (2a) is evenly distributed with ripple pearl through hole (2b),
Described jack shaft (3) other end is sleeved in the centre bore of driven wheel (2), described jack shaft (3) is positioned at driven wheel (2) and the part between the bearing (4) of driven wheel (2) is provided with spline, and described jack shaft (3) is set with return spring (6), static friction clutch-plate (7), clutch hub (8) and ripple pearl clutch hub (9) outward successively near this section of driven wheel (2);
One end of described return spring (6) is against on bearing (4), described static friction clutch-plate (7) is for circular, the aperture of described static friction clutch-plate (7) is greater than the external diameter of jack shaft (3), the excircle of described static friction clutch-plate (7) is evenly equipped with spacing journal stirrup (7a), described semiaxis sleeve (5) is provided with the static friction clutch-plate installing hole that aperture is greater than its centre bore near one end of driven wheel (2), the center line of described static friction clutch-plate installing hole and the center line of semiaxis sleeve (5) are on the same line, the corresponding spacing journal stirrup (7a) of inner surface of described static friction clutch-plate installing hole is provided with friction clutch disc locking groove (5a), spacing journal stirrup (7a) on the excircle of described static friction clutch-plate (7) is arranged in friction clutch disc locking groove (5a),
Also spline is provided with in the centre bore of described clutch hub (8), described clutch hub (8) to be coordinated with jack shaft (3) by spline installs, the other end of described return spring (6) is connected with clutch hub (8), be installed with dynamic friction clutch-plate (10) outside described clutch hub (8), on the excircle of described dynamic friction clutch-plate (10), also corresponding friction clutch disc locking groove (5a) is provided with spacing journal stirrup (7a);
Described ripple pearl clutch hub (9) is solidly set on jack shaft (3), and described ripple pearl clutch hub (9) part is arranged in ripple pearl clutch hub installing hole (2a), the excircle that described ripple pearl clutch hub (9) is arranged in the part of ripple pearl clutch hub installing hole (2a) is provided with ripple pearl groove, ripple pearl (9a) is housed in ripple pearl groove, and described ripple pearl (9a) reaches in the through hole (2b) on ripple pearl clutch hub installing hole (2a) hole wall;
Described ripple pearl clutch hub (9) overcoat has clutch ripple dish (11), described clutch ripple dish (11) is provided with the center line shoulder hole on the same line (11a) of center line and its centre bore near one end of driven wheel (2), this shoulder hole (11a) is divided into small-bore section, conical section and large aperture section from inside to outside successively, the aperture of the small-bore section of this shoulder hole (11a) is greater than the aperture of the centre bore of clutch ripple dish (11), and the end sleeve of described driven wheel (2) is in the small-bore section of the shoulder hole of clutch ripple dish (11).
Adopt such scheme, clutch ripple dish arranges shift fork, in normal walking process, static friction clutch-plate is separated with the dynamic friction clutch-plate on clutch hub, and the end sleeve of driven wheel is contained in the small-bore section of the shoulder hole of clutch ripple dish, and such ripple integument is pressed in the through hole of driven wheel and the ripple pearl groove of ripple pearl clutch hub, make driven wheel with ripple pearl clutch hub be connected, driven wheel rotates, thus drives jack shaft to rotate, and car normally advances.
When needs are turned, shift fork drives the clutch ripple dish of two jack shafts to move to two ends, the end of driven wheel moves on in the large aperture section of the shoulder hole of clutch ripple dish, clutch ripple dish is not or not compressing ripple pearl, ripple pearl jumps out the ripple pearl groove of ripple pearl clutch hub, ripple pearl clutch hub and driven wheel are departed from, thus jack shaft rotates under effect of inertia, now, radius of turn is large.When continuation moves clutch ripple dish to two ends, clutch ripple dish promotes clutch hub and moves to end, compression retracteding position spring, simultaneously, static friction clutch-plate moves at the bottom of the hole of static friction clutch-plate installing hole, and is against at the bottom of hole, and the dynamic friction clutch-plate on clutch hub and static friction clutch-plate are fitted, simultaneously, spacing journal stirrup on dynamic friction clutch-plate is also stuck in the friction clutch disc locking groove of semiaxis sleeve, and jack shaft is braked completely, at this moment, just can only spin in original place, radius of turn is minimum.
When needs normally advance again, shift fork is moved round about, under the effect of the conical section of the shoulder hole of clutch ripple dish, ripple integument is pressed onto in the ripple pearl groove of ripple pearl clutch hub, make ripple pearl clutch hub and driving gear from new connection, meanwhile, return spring return, sound friction clutch disc leaves, and jack shaft rotates.
In technique scheme: described static friction clutch-plate (7) is for being greater than a slice.Such braking effect is better.
In technique scheme: described dynamic friction clutch-plate (10) is also for being greater than a slice, described dynamic friction clutch-plate (10) is also circular, the inner periphery of described dynamic friction clutch-plate (10) is provided with draw-in groove, the excircle of described clutch hub (8) is provided with the projection (8a) corresponding with draw-in groove, the tail end of described projection (8a) is provided with limited block (8b), and described projection (8a) is stuck in the draw-in groove on the inner periphery of dynamic friction clutch-plate (10).So just can realize dynamic friction clutch-plate to be fixedly connected with clutch hub, under the limited block extruding on clutch hub, sound friction clutch disc is adjacent to.
In technique scheme: described driven wheel (2) comprises central tube (21), form gear (22) at the integral middle of the outer surface of central tube (21), the both ends of described central tube (21) are enclosed within the small-bore section of shoulder hole (11a) of clutch ripple dish (11) respectively.
In technique scheme: described clutch hub (8) end is provided with the ripple pearl clutch hub connecting hole that aperture is greater than its centre bore, described ripple pearl clutch hub (9) is in this ripple pearl clutch hub connecting hole of partial insertion of clutch hub (8).Such compact conformation, braking effect is better.
The invention has the beneficial effects as follows: clutch hub and brake system are arranged on jack shaft by the present invention simultaneously, so only need to arrange shift fork on the clutch ripple dish of clutch hub, make operating system simpler, operate more flexible, brake easily, can also realize the adjustment that radius of turn is minimum and maximum.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention;
Fig. 2 is the partial enlarged drawing at A place in Fig. 1;
Fig. 3 is cutaway view;
Fig. 4 is the partial enlarged drawing at B place in Fig. 3;
Fig. 5 is the structural representation of sound friction clutch disc;
Fig. 6 is the structural representation of clutch hub;
Fig. 7 is the structural representation of clutch ripple dish;
Fig. 8 is the structural representation of driven wheel;
Fig. 9 is the structural representation of ripple pearl clutch hub;
Figure 10 is the structural representation of semiaxis sleeve.
Concrete enforcement 0 mode
Below in conjunction with the drawings and specific embodiments, the present invention will be further described:
Embodiment 1
As Figure 1-10 shows: driving bridge for crawler-type combine of the present invention is made up of parts such as driving wheel 1, driven wheel 2, the jack shaft 3 being positioned at driven wheel 2 two ends, bearing 4, semiaxis sleeve 5, return spring 6, static friction clutch-plate 7, clutch hub 8, ripple pearl clutch hub 9, dynamic friction clutch-plate 10 and clutch ripple dishes 11.
Driven wheel 2 comprises central tube 21, gear 22 is formed at the integral middle of the outer surface of central tube 21, the two ends of central tube 21 are provided with the ripple pearl clutch hub installing hole 2a that aperture is greater than its centre bore, the center line of ripple pearl clutch hub installing hole 2a and the center line of centre bore on the same line, the hole wall of ripple pearl clutch hub installing hole 2a are evenly distributed with ripple pearl through hole 2b.
Jack shaft 3 one end is sleeved in driven wheel 2 central tube 21, the other end is connected with driving wheel 1, jack shaft 3 is arranged in semiaxis sleeve 5 by bearing 4, and, the two ends of jack shaft 3 all reach outside semiaxis sleeve 5, jack shaft 3 is provided with spline at driven wheel 2 and the part between the bearing 4 of driven wheel 2, and jack shaft 3 is set with return spring 6, static friction clutch-plate 7, clutch hub 8 and ripple pearl clutch hub 9 outward successively near this section of driven wheel 2.
One end of return spring 6 is against on bearing 4.Static friction sheet 7 is identical with the structure of movable friction plate 10, the quantity of static friction clutch-plate 7 is greater than a slice, static friction clutch-plate 7 is circular, the aperture of static friction clutch-plate 7 is greater than the external diameter of jack shaft 3, that is, without annexation between static friction clutch-plate 7 and jack shaft 3, only be enclosed within outside jack shaft 3, the excircle of static friction clutch-plate 7 is evenly equipped with spacing journal stirrup 7a, inner periphery is provided with draw-in groove, semiaxis sleeve 5 is provided with the static friction clutch-plate installing hole that aperture is greater than its centre bore near one end of driven wheel 2, the center line of static friction clutch-plate installing hole and the center line of semiaxis sleeve 5 are on the same line, the corresponding spacing journal stirrup 7a of inner surface of static friction clutch-plate installing hole is provided with friction clutch disc locking groove 5a, spacing journal stirrup 7a on the excircle of static friction clutch-plate 7 is arranged in friction clutch disc locking groove 5a.
Clutch hub 8 end is provided with the ripple pearl clutch hub connecting hole that aperture is greater than its centre bore, also spline is provided with in the centre bore of clutch hub 8, clutch hub 8 to be coordinated with jack shaft 3 by spline to be installed, the other end of return spring 6 is connected with clutch hub 8, be installed with dynamic friction clutch-plate 10 outside clutch hub 8, on the excircle of dynamic friction clutch-plate 10, also corresponding friction clutch disc locking groove 5a is provided with spacing journal stirrup 7a; The quantity of dynamic friction clutch-plate 10 is also greater than a slice, dynamic friction clutch-plate 10 is also circular, the inner periphery of dynamic friction clutch-plate 10 is provided with draw-in groove, the excircle of clutch hub 8 is provided with the projection 8a corresponding with draw-in groove, the tail end of projection 8a is provided with limited block 8b, and projection 8a is stuck in the draw-in groove on the inner periphery of dynamic friction clutch-plate 10.Clutch hub 8 part reaches in semiaxis sleeve 5.
Ripple pearl clutch hub 9 is solidly set on jack shaft 3, preferably also passes through spline joint.And ripple pearl clutch hub 9 part is arranged in ripple pearl clutch hub installing hole 2a, the external diameter that ripple pearl clutch hub 9 is arranged in the part of ripple pearl clutch hub installing hole 2a is greater than the external diameter being positioned at its outer part.The part of the ripple pearl clutch hub installing hole 2a that ripple pearl clutch hub 9 is arranged in be circumferentially provided with ripple pearl groove, ripple pearl 9a is housed in ripple pearl groove, and ripple pearl 9a reaches in the through hole 2b on ripple pearl clutch hub installing hole 2a hole wall.
Ripple pearl clutch hub 9 overcoat has clutch ripple dish 11, clutch ripple dish 11 is provided with the center line shoulder hole 11a on the same line of center line and its centre bore near one end of driven wheel 2, this shoulder hole 11a is divided into small-bore section, conical section and large aperture section from inside to outside successively, the aperture of the small-bore section of this shoulder hole 11a is greater than the aperture of the centre bore of clutch ripple dish 11, and the end sleeve of the central tube 21 of driven wheel 2 is in the small-bore section of the shoulder hole of clutch ripple dish 11.The external diameter of clutch hub 8 near one end of ripple pearl clutch hub 9 is greater than the external diameter of this end of clutch ripple dish 11, is convenient to clutch hub 8 can be driven to move when such clutch ripple dish 11 moves.
Clutch ripple dish 11 arranges shift fork, in normal walking process, static friction clutch-plate 7 is separated with the dynamic friction clutch-plate 10 on clutch hub 8, the end sleeve of the central tube 21 of driven wheel 2 is contained in the small-bore section of the shoulder hole 11a of clutch ripple dish 11, such ripple pearl 9a is crushed in the through hole of driven wheel 2 and the ripple pearl groove of ripple pearl clutch hub 9, make driven wheel 2 with ripple pearl clutch hub 9 be connected, driven wheel 2 rotates, thus drive jack shaft 3 to rotate, normally advance.
When needs are turned, shift fork drives the clutch ripple dish 11 of two jack shafts 3 to move to two ends, the end of driven wheel 2 moves on in the large aperture section of the shoulder hole 11a of clutch ripple dish 11, ripple pearl 9a jumps out the ripple pearl groove of ripple pearl clutch hub 9, ripple pearl clutch hub 9 and driven wheel 2 are departed from, thus jack shaft 3 rotates under effect of inertia, now, radius of turn is large.When continuation moves clutch ripple dish 11 to two ends, clutch ripple dish 11 promotes clutch hub 8 and moves to end, compression retracteding position spring 6, simultaneously, static friction clutch-plate 7 moves at the bottom of the hole of static friction clutch-plate installing hole 5a, and be against at the bottom of hole, under the acting in conjunction of the limited block 8b on clutch hub 8, dynamic friction clutch-plate 10 on clutch hub 8 is fitted with static friction clutch-plate 7, gapless, simultaneously, spacing journal stirrup 7a on dynamic friction clutch-plate 10 is also stuck in the friction clutch disc locking groove 5a of semiaxis sleeve 5, jack shaft 3 is braked completely, at this moment, just can only spin in original place, radius of turn is minimum.
When needs normally advance again, stop drag shift fork, return spring 6 return, under the effect of the conical section of the shoulder hole 11a of clutch ripple dish 11, ripple pearl 9a is forced in the ripple pearl groove of ripple pearl clutch hub 9, make ripple pearl clutch hub 9 and driven wheel 2 from new connection, sound friction clutch disc leaves, and jack shaft 3 rotates.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just design according to the present invention can make many modifications and variations without the need to creative work.Therefore, all technical staff in the art, all should by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (6)
1. a driving bridge for crawler-type combine, comprise driving wheel (1), driven wheel (2) and be positioned at the jack shaft (3) at driven wheel (2) two ends, one end of described jack shaft (3) is connected with driving wheel (1), the other end is connected with driven wheel (2), it is characterized in that: on jack shaft (3), be provided with ripple pearl clutch and braking system simultaneously, described ripple pearl clutch controls jack shaft (3) and rotates along with driven wheel (2) or depart from driven wheel (2), brake system is controlled by the mobile of the clutch ripple dish (11) on ripple pearl clutch.
2. a kind of driving bridge for crawler-type combine according to claim 1, is characterized in that: concrete structure is:
Described jack shaft (3) is arranged in semiaxis sleeve (5) by bearing (4), and, the two ends of described jack shaft (3) all reach semiaxis sleeve (5) outward, one end of described jack shaft (3) is connected with driving wheel (1), (2) are provided with centre bore to described driven wheel vertically, the two ends of described driven wheel (2) are provided with ripple pearl clutch hub installing hole (2a) that aperture is greater than centre bore, the center line of described ripple pearl clutch hub installing hole (2a) and the center line of centre bore are on the same line, the hole wall of described ripple pearl clutch hub installing hole (2a) is evenly distributed with ripple pearl through hole (2b),
Described jack shaft (3) other end is sleeved in the centre bore of driven wheel (2), described jack shaft (3) is positioned at driven wheel (2) and the part between the bearing (4) of driven wheel (2) is provided with spline, and described jack shaft (3) is set with return spring (6), static friction clutch-plate (7), clutch hub (8) and ripple pearl clutch hub (9) outward successively near this section of driven wheel (2);
One end of described return spring (6) is against on bearing (4), described static friction clutch-plate (7) is for circular, the aperture of described static friction clutch-plate (7) is greater than the external diameter of jack shaft (3), the excircle of described static friction clutch-plate (7) is evenly equipped with spacing journal stirrup (7a), described semiaxis sleeve (5) is provided with the static friction clutch-plate installing hole that aperture is greater than its centre bore near one end of driven wheel (2), the center line of described static friction clutch-plate installing hole and the center line of semiaxis sleeve (5) are on the same line, the corresponding spacing journal stirrup (7a) of inner surface of described static friction clutch-plate installing hole is provided with friction clutch disc locking groove (5a), spacing journal stirrup (7a) on the excircle of described static friction clutch-plate (7) is arranged in friction clutch disc locking groove (5a),
Also spline is provided with in the centre bore of described clutch hub (8), described clutch hub (8) to be coordinated with jack shaft (3) by spline installs, the other end of described return spring (6) is connected with clutch hub (8), be installed with dynamic friction clutch-plate (10) outside described clutch hub (8), on the excircle of described dynamic friction clutch-plate (10), also corresponding friction clutch disc locking groove (5a) is provided with spacing journal stirrup (7a);
Described ripple pearl clutch hub (9) is solidly set on jack shaft (3), and described ripple pearl clutch hub (9) part is arranged in ripple pearl clutch hub installing hole (2a), the excircle that described ripple pearl clutch hub (9) is arranged in the part of ripple pearl clutch hub installing hole (2a) is provided with ripple pearl groove, ripple pearl (9a) is housed in ripple pearl groove, and described ripple pearl (9a) reaches in the through hole (2b) on ripple pearl clutch hub installing hole (2a) hole wall;
Described ripple pearl clutch hub (9) overcoat has clutch ripple dish (11), described clutch ripple dish (11) is provided with the center line shoulder hole on the same line (11a) of center line and its centre bore near one end of driven wheel (2), this shoulder hole (11a) is divided into small-bore section, conical section and large aperture section from inside to outside successively, the aperture of the small-bore section of this shoulder hole (11a) is greater than the aperture of the centre bore of clutch ripple dish (11), and the end sleeve of described driven wheel (2) is in the small-bore section of the shoulder hole of clutch ripple dish (11).
3. a kind of driving bridge for crawler-type combine according to claim 2, is characterized in that: the quantity of described static friction clutch-plate (7) is greater than a slice.
4. a kind of driving bridge for crawler-type combine according to claim 3, it is characterized in that: the quantity of described dynamic friction clutch-plate (10) is also greater than a slice, described dynamic friction clutch-plate (10) is also circular, the inner periphery of described dynamic friction clutch-plate (10) is provided with draw-in groove, the excircle of described clutch hub (8) is provided with the projection (8a) corresponding with draw-in groove, the tail end of described projection (8a) is provided with limited block (8b), and described projection (8a) is stuck in the draw-in groove on the inner periphery of friction plate (10).
5. a kind of driving bridge for crawler-type combine according to claim 4, it is characterized in that: described driven wheel (2) comprises central tube (21), form gear (22) at the integral middle of the outer surface of central tube (21), the both ends of described central tube (21) are enclosed within the small-bore section of shoulder hole (11a) of clutch ripple dish (11) respectively.
6. a kind of driving bridge for crawler-type combine according to claim 2, it is characterized in that: described clutch hub (8) end is provided with the ripple pearl clutch hub connecting hole that aperture is greater than its centre bore, described ripple pearl clutch hub (9) is in this ripple pearl clutch hub connecting hole of partial insertion of clutch hub (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410679495.5A CN104380924B (en) | 2014-11-24 | 2014-11-24 | A kind of driving bridge for crawler-type combine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410679495.5A CN104380924B (en) | 2014-11-24 | 2014-11-24 | A kind of driving bridge for crawler-type combine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104380924A true CN104380924A (en) | 2015-03-04 |
| CN104380924B CN104380924B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410679495.5A Active CN104380924B (en) | 2014-11-24 | 2014-11-24 | A kind of driving bridge for crawler-type combine |
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| Country | Link |
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| CN (1) | CN104380924B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2376280B (en) * | 2001-06-05 | 2005-01-19 | Dronningborg Ind As | Clutch and brake for rotating body |
| CN201682766U (en) * | 2010-08-16 | 2010-12-29 | 重庆嘉木机械有限公司 | Steering clutch for harvester |
| CN202703240U (en) * | 2012-05-21 | 2013-01-30 | 南通哈兰机械有限公司 | Drive axle having electric motor, gear deceleration mechanism, and braking system |
| CN203136573U (en) * | 2013-03-25 | 2013-08-21 | 南京东格机械有限公司 | Tracked combined harvester walking and driving device |
| CN204244753U (en) * | 2014-11-24 | 2015-04-08 | 重庆五谷通用设备有限公司 | Driving bridge for crawler-type combine |
-
2014
- 2014-11-24 CN CN201410679495.5A patent/CN104380924B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2376280B (en) * | 2001-06-05 | 2005-01-19 | Dronningborg Ind As | Clutch and brake for rotating body |
| CN201682766U (en) * | 2010-08-16 | 2010-12-29 | 重庆嘉木机械有限公司 | Steering clutch for harvester |
| CN202703240U (en) * | 2012-05-21 | 2013-01-30 | 南通哈兰机械有限公司 | Drive axle having electric motor, gear deceleration mechanism, and braking system |
| CN203136573U (en) * | 2013-03-25 | 2013-08-21 | 南京东格机械有限公司 | Tracked combined harvester walking and driving device |
| CN204244753U (en) * | 2014-11-24 | 2015-04-08 | 重庆五谷通用设备有限公司 | Driving bridge for crawler-type combine |
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| Publication number | Publication date |
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| CN104380924B (en) | 2016-08-24 |
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