CN211496069U

CN211496069U - Crawler-type self-balancing transshipment bridge

Info

Publication number: CN211496069U
Application number: CN201922452340.9U
Authority: CN
Inventors: 孟凡波; 王登; 宋志杰; 邓海; 宋珊; 杨永亮; 原年亮
Original assignee: Jiaozuo Creation Heavy Industry Co ltd
Current assignee: Jiaozuo Creation Heavy Industry Co ltd
Priority date: 2019-12-31
Filing date: 2019-12-31
Publication date: 2020-09-15
Anticipated expiration: 2029-12-31

Abstract

The utility model belongs to the technical field of belt conveyors, in particular to a crawler-type self-balancing transloading bridge, which comprises a tail driving truss, an annular conveying belt and a belt driving mechanism, wherein the belt driving mechanism is arranged in the tail driving truss, the front part below the tail driving truss is provided with a II-type crawler chassis, the rear part below the tail driving truss is provided with an I-type crawler chassis, the tail driving truss is connected with a middle conveying truss through a hinge mechanism, the rear part below the middle conveying truss is provided with a III-type crawler chassis, the middle conveying truss is connected with a head discharging truss through the hinge mechanism, the rear part below the head discharging truss is provided with the I-type crawler chassis, the tail driving truss, the middle conveying truss and the head discharging truss are combined to form a movable trestle, the annular conveying belt circularly penetrates the head and the tail of the whole movable trestle and the belt driving mechanism, when the device moves, can adapt to the integral moving machine of uneven terrains such as hills.

Description

Crawler-type self-balancing transshipment bridge

Technical Field

The utility model belongs to the technical field of belt conveyor, concretely relates to crawler-type self-balancing reprinting bridge.

Background

The belt conveyor is the most important bulk material conveying and loading and unloading equipment, can be widely applied to the industrial fields of mines, metallurgy, building materials, chemical industry, electric power, food processing and the like, and can meet the forms of various operation working conditions according to the differences of the use places, the working environments, the technical performance, the types of conveyed materials and the like of the belt conveyor. Because of the characteristics of wide conveying and feeding types, wide conveying capacity range, strong adaptability of conveying lines, flexible loading and unloading, strong reliability and low cost, the belt conveyor gradually replaces automobile and locomotive transportation in some fields to become main equipment for bulk material transportation.

With the progress of technical application, the belt conveyor plays an increasingly large role in bulk material transportation, belt conveying in strip mine mining replaces ore blocking conveying to become a trend, and many mining, stripping and dumping processes require the belt conveyor to have the functions of transverse movement and longitudinal movement, and are suitable for the ground conditions with severe sites. At present, most of common transverse moving belt conveyors in stock yards are displacement belt conveyors, the distance of one-time displacement of the displacement belt conveyors is short, the displacement belt conveyors spend a large amount of time, the workload of rearrangement is increased along with the increase of the length of the belt conveyors, the traditional displacement belt conveyors have long displacement time, the displacement belt conveyors need large space, and the like, and the production requirements cannot be met.

SUMMERY OF THE UTILITY MODEL

In order to the above situation, the utility model provides a crawler-type self-balancing reprinting bridge only needs the end to end position of confirming the belt feeder, and the interlude can remove the adjustment to operating position conveniently, and this makes the conveyer can adapt to the topography of unevenness, has expanded belt conveyor's application scenario.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the crawler-type self-balancing transloading bridge comprises a tail driving truss, an annular conveying belt and a belt driving mechanism, wherein according to the conveying trend of materials from left to right, a front material receiving end is a tail part, a rear material discharging end is a head part, the belt driving mechanism is arranged in the tail driving truss, a II-type crawler chassis is arranged at the front part below the tail driving truss, an I-type crawler chassis is arranged at the rear part below the tail driving truss, the rear end of the tail driving truss is rotatably connected with a middle conveying truss through a hinge mechanism, a III-type crawler chassis is arranged at the rear part below the middle conveying truss, a head material discharging truss is rotatably connected at the rear end of the middle conveying truss through a hinge mechanism, an I-type crawler chassis is arranged at the rear part below the head material discharging truss, and the tail driving truss, the middle conveying truss and the head material discharging truss are combined to form the, the belt driven type conveying device is characterized in that belt direction-changing rollers are arranged at two ends of the movable trestle, a plurality of belt carrier rollers are arranged on the movable trestle in a matched mode, the annular conveying belt circularly penetrates through the head and the tail of the whole movable trestle and the belt driving mechanism, and the belt driving mechanism provides operation power for the annular conveying belt.

As preferred scheme, the tip of the both sides roof beam of hinge mechanisms setting in each truss junction, every group hinge mechanisms include a convex public piece of rigid coupling on the front-end truss and a concave female member of cooperation rigid coupling on the back-end truss, the public piece of convex is embedded in the centre and is equipped with a joint bearing, the coaxial bearing end cover that is used for preventing that joint bearing from deviating from that has set firmly in the both sides of the public piece of convex, it is provided with V type rubber seal still to cooperate in the grafting gap of the public piece of periphery convex of bearing end cover and concave female member, joint pin is worn to be equipped with in the joint bearing fit, joint pin's both ends rigid coupling has the axle head baffle, two the axle head baffle is in the same place with the two lateral wall rigid couplings of concave female member.

As the preferred scheme, II type crawler chassis includes crawler chassis, crawler chassis top is provided with rotary platform, but through slewing bearing swivelling joint between crawler chassis and the rotary platform, rotary platform passes through central hinge axle and its top support frame swivelling joint, support frame both ends upside is articulated rather than two lower boundary beams of top removal landing stage truss through connecting the hinge axle mutually, and, support frame below four corners through four leveling pneumatic cylinders with rotary platform hinge joint.

As preferred scheme, III type crawler chassis includes crawler chassis, crawler chassis top is provided with rotary platform, but through slewing bearing swivelling joint between crawler chassis and the rotary platform, rotary platform passes through central hinge axle and its top support frame swivelling joint, vertical rail wheel an is installed to support frame both ends upside, and its top removes the cooperation of two lower beams undersides of landing stage truss and is provided with vertical track a, in addition, two the lower beam outside still is provided with horizontal track, the support frame both ends vertical rail wheel an outside is provided with the horizontal rail wheel that is used for preventing vertical rail wheel an derail through the cooperation of L shape support, and, support frame below four corners through four leveling pneumatic cylinders with rotary platform hinge connects.

As a preferred scheme, the I-type crawler chassis comprises a crawler chassis, a rotary platform is arranged above the crawler chassis, the crawler chassis is rotatably connected with the rotary platform through a rotary support, the rotary platform is rotatably connected with a support frame above the rotary platform through a central hinge shaft, a push-pull support is fixedly connected above the support frame, support shafts are fixedly connected with two ends of the push-pull support, a telescopic push-pull shaft sleeve is sleeved on the periphery of the support shaft, a linear bearing is arranged between the support shaft and the push-pull shaft sleeve, a telescopic protective sleeve is further connected between the push-pull shaft sleeve and the push-pull support, vertical rail wheels b are arranged on the upper side of the push-pull shaft sleeve, longitudinal rails b are arranged on the lower sides of two lower beams of a movable trestle truss above the push-pull shaft sleeve in a matched mode, in addition, a limiting bulge is further fixedly arranged in the middle of, and four corners below the supporting frame are hinged with the rotary platform through four leveling hydraulic cylinders.

As a preferred scheme, a control chamber matched with the crawler chassis is arranged on one side of the crawler chassis, and an electric control system and a hydraulic system of the corresponding crawler chassis and the leveling hydraulic cylinder are arranged in the control chamber.

The crawler-type self-balancing transshipment bridge is a long-distance conveying trestle conveyor which is formed by movably connecting a plurality of independent movable crawler trusses together through a hinge mechanism and integrally penetrating and winding a circulating conveying belt with corresponding length;

the running direction of the conveying belt is taken as the X-axis direction, the up-down direction of the conveying belt is taken as the Y-axis direction, and the directions of two sides of the conveying belt are taken as the Z-axis direction;

the II-type crawler chassis is the most basic moving form and provides displacement constraints in the X-axis direction, the Y-axis direction and the Z-axis direction for the truss structure above the II-type crawler chassis;

on the basis of a II-type crawler chassis, a connecting hinged shaft of the III-type crawler chassis is changed into a vertical rail wheel a and a longitudinal rail a which can relatively and freely slide in a certain range in the X-axis direction, and a horizontal rail wheel and a transverse rail which are used for clamping and preventing the vertical rail wheel a from derailing are additionally arranged, so that displacement restraint in the Y-axis direction and the Z-axis direction is provided for a truss structure above the III-type crawler chassis;

the I-type crawler chassis is the highest moving form, on the basis of the III-type crawler chassis, a push-pull supporting structure capable of realizing relatively free telescopic offset in a certain range in the Z-axis direction is additionally arranged between a supporting frame and a truss structure above the supporting frame, the push-pull supporting structure can enable a balance beam to axially move along a supporting shaft and rotate around the supporting shaft, a linear bearing is arranged on the supporting shaft, a shaft sleeve and the balance beam can axially move along the shaft, the balance beam can rotate around the shaft sleeve, a supporting point can release the degrees of freedom in the two directions, the I-type crawler chassis keeps a vertical rail wheel b and a longitudinal rail b which are similar to the III-type crawler chassis and can freely roll and slide relatively in a certain range in the X-axis direction, the clamping horizontal rail wheel and the transverse rail of the III-type crawler chassis are removed, and a middle limiting bulge and a limiting stopper are used for assisting in preventing the truss from shifting beyond the range, providing a displacement constraint for the truss structure above it in only one direction of the Z-axis.

The truss structure above the three different forms of track chassis can rotate around the X, Y, Z axis.

The utility model discloses still including other subassemblies that can make this crawler-type self-balancing transshipment bridge normal use, be the conventional technical means in this field, in addition, the utility model discloses in add device or the subassembly of injecing, like track moving mechanism's slewing bearing, rotary platform and walking control system, leveling pneumatic cylinder control system, belt driven roll and belt tensioning mechanism etc. all adopt the conventional setting in this field.

The utility model has the advantages as follows:

the crawler-type self-balancing transfer bridge is a self-adjusting movable trestle type belt conveyor, and comprises a trestle structure formed by hinging a plurality of independent truss units, three types of I-type crawler chassis, II-type crawler chassis, III-type crawler chassis and belt driving mechanisms with different static supporting functions.

The trestle conveyer is a statically determinate multi-span beam structure on an XZ plane, the trestle can be regarded as a rigid body in the XY plane, and is supported by the crawler chassis in three forms, so that the stress of the structure is unique and no redundant constraint exists, when the conveyer walks on uneven ground or the walking speeds of the crawler chassis are inconsistent, no additional acting force is generated between the crawler chassis and the trestle, and meanwhile, abnormal internal force is prevented from being generated between the trusses so as to adapt to the realization of integral movement on uneven ground.

The landing stage structure provides the support for the belt feeder system, and the track chassis provides the support for the landing stage, for the landing stage removes provides power, but horizontal and longitudinal movement, only need confirm the operating position of the head and the tail of belt feeder, the belt feeder interlude just can automatically regulated to the position that can normally work to but can automatically regulated, when keeping the horizontal condition of landing stage, can be in if rugged topography such as hilly area arranges fast, can greatly reduce to move and establish work load, enlarged the application occasion of equipment. In addition, due to the automatic hydraulic adjusting mechanism, the level of the trestle can be automatically adjusted, and the belt deviation caused by uneven terrain is avoided.

Drawings

Fig. 1 is a schematic structural diagram of a crawler-type self-balancing transfer bridge of the embodiment.

Fig. 2 is a schematic structural view of the type ii crawler chassis of fig. 1.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2.

Fig. 4 is a schematic structural view of the type iii crawler chassis of fig. 1.

Fig. 5 is an enlarged schematic view of a portion B of fig. 4.

Fig. 6 is a schematic structural view of the type i crawler chassis of fig. 1.

Fig. 7 is an enlarged schematic view of the portion C of fig. 6.

Fig. 8 is a schematic structural view of the hinge mechanism of fig. 1.

Detailed Description

The technical solution of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments.

Examples

As shown in fig. 1-8, the crawler-type self-balancing transloading bridge comprises a tail driving truss 1, an annular conveying belt 2 and a belt driving mechanism 3, wherein according to the conveying direction of materials from left to right, a front material receiving end is a tail part, a rear material discharging end is a head part, the belt driving mechanism 3 is installed in the tail driving truss 1, a second-type crawler chassis 5 is arranged at the front part below the tail driving truss 1, a first-type crawler chassis 4 is arranged at the rear part below the tail driving truss 1, a middle conveying truss 7 is rotatably connected at the rear end of the tail driving truss 1 through a hinge mechanism 8, a third-type crawler chassis 6 is arranged at the rear part below the middle conveying truss 7, a head material discharging truss 9 is rotatably connected at the rear end of the middle conveying truss 7 through a hinge mechanism 8, a first-type crawler chassis 4 is arranged at the rear part below the head material discharging truss 9, afterbody drive truss 1, middle transport truss 7 and the combination of head ejection of compact truss 9 have constituted removal landing stage 10, it is provided with belt driven pulley 11 to remove landing stage 10 both ends, it is provided with a plurality of belt rollers 12 to remove the cooperation on the landing stage 10, annular conveyor belt 2 circulates and wears around whole removal landing stage 10 end to end and belt drive mechanism 3, belt drive mechanism 3 provides operating power for annular conveyor belt 2.

The hinge mechanisms 8 are arranged at the end parts of the upper side beams on two sides of each truss connection part, each hinge mechanism 8 comprises a convex male part 801 fixedly connected to a front truss and a concave female part 802 fixedly connected to a rear truss in a matched mode, a joint bearing 803 is embedded in the convex male part 801 in the center, bearing end covers 804 used for preventing the joint bearing 802 from falling off are coaxially and fixedly arranged on two sides of the convex male part 801, V-shaped rubber sealing rings 805 are further arranged in insertion gaps of the convex male part 801 and the concave female part 802 on the periphery of the bearing end covers 804 in a matched mode, a connecting pin shaft 806 is arranged in the joint bearing 802 in a penetrating mode in the matched mode, two end baffles 807 are fixedly connected to two ends of the connecting pin shaft 806, and the two end baffles 807 are fixedly connected with two outer side walls of the concave female part 802.

II type crawler chassis 5 includes crawler chassis 13, crawler chassis 13 top is provided with rotary platform 15, but pass through slewing bearing 14 swivelling joint between crawler chassis 13 and the rotary platform 15, rotary platform 15 passes through central hinge 16 rather than top support frame 17 rotatable coupling, support frame 17 both ends upside is articulated mutually rather than two lower boundary beams of top removal trestle 10 truss through connecting hinge 501, and, support frame 17 below four corners through four leveling pneumatic cylinders 18 with rotary platform 15 articulates.

III type crawler chassis 6 includes crawler chassis 13, crawler chassis 13 top is provided with rotary platform 15, but pass through slewing bearing 14 swivelling joint between crawler chassis 13 and the rotary platform 15, rotary platform 15 passes through central hinge 16 rather than top support frame 17 rotatable coupling, vertical rail wheel a601 is installed to support frame 17 both ends upside, and the cooperation of two lower boundary beam undersides of its top removal landing stage 10 truss is provided with vertical track a602, in addition, two the lower boundary beam outside still is provided with horizontal track 603, the support frame 17 both ends the cooperation of vertical rail wheel a601 outside is provided with the horizontal rail wheel 604 that is used for preventing vertical rail wheel a601 derail through L shape support, and, support frame 17 below four corners through four leveling hydraulic cylinder 18 with rotary platform 15 hinge connects.

The I-type crawler chassis 4 comprises a crawler chassis 13, a rotary platform 15 is arranged above the crawler chassis 13, the crawler chassis 13 and the rotary platform 15 are rotatably connected through a rotary support 14, the rotary platform 15 is rotatably connected with a support frame 17 above the rotary platform through a central hinge shaft 16, a push-pull support 403 is fixedly connected above the support frame 17, support shafts 404 are fixedly connected at two ends of the push-pull support 403, a telescopic push-pull shaft sleeve 406 is sleeved on the periphery of each support shaft 404, a linear bearing 405 is arranged between each support shaft 404 and the corresponding push-pull shaft sleeve 406, a telescopic protective sleeve 407 is further connected between each push-pull shaft sleeve 406 and the corresponding push-pull support 403, vertical rail wheels b401 are mounted on the upper sides of the push-pull shaft sleeves 406, longitudinal rails b402 are arranged on the lower sides of two lower side beams of a truss of the movable trestle 10 above, two limit stop blocks 409 are symmetrically and fixedly arranged on the lower side surface of the connecting cross beam between the two lower side beams of the truss in a matching mode and positioned on the limit bulge 408, and four corners below the supporting frame 17 are hinged with the rotary platform 15 through four leveling hydraulic cylinders 18.

A control chamber 19 matched with the crawler chassis 13 is arranged on one side of the crawler chassis 13, and an electric control system and a hydraulic system of the corresponding crawler chassis 13 and the leveling hydraulic cylinder 18 are arranged in the control chamber 19.

The crawler-type self-balancing transshipment bridge of the embodiment only shows a simple composition form that a section of tail driving truss 1, a section of middle conveying truss 7 and a section of head discharging truss 9 are hinged, and according to the length of the required conveying distance, a plurality of sections of middle conveying trusses 7 matched with the I-shaped crawler chassis 4 can be additionally arranged between the tail driving truss 1 and the middle conveying trusses 7, and an annular conveying belt 2 with corresponding length is additionally arranged to form a trestle conveyor with longer distance.

The I-type crawler chassis 4 is mainly arranged in the middle of a trestle conveyor, can roll and slide freely relatively within the range of +/-1.25 m in the X-axis direction, can stretch and deflect freely relatively within the range of +/-250 mm in the Z-axis direction, ensures that no additional acting force is generated between the crawler chassis and the trestle when walking on uneven ground, and has good movement flexibility.

The III-type crawler chassis 6 is generally arranged at the tail part of a trestle conveyor, the displacement constraint can ensure that the trestle transversely and synchronously moves along with the crawler chassis, the transverse position is determined, meanwhile, abnormal internal force is avoided from being generated between the trusses, and the trestle can relatively freely roll and slide in the X-axis direction within the range of +/-1.5 m.

The II-type double-track chassis 5 is generally arranged at the tail part of the trestle conveyor, and the constraint on three displacements can ensure that the trestle travels and is positioned along with the track chassis.

The movable truss 10 is connected with the support frame 17 through a hinge shaft, and the structure limits the transverse and longitudinal displacement of the trestle and enables the chassis not to bear moment along the X axis and the Y axis.

The force difference of the trestle caused by the eccentric center of gravity is born by the support frame and the leveling hydraulic cylinder 18 for adjusting the support frame to be horizontal, one side of the trestle is pushed and pulled to reach balance, the upper surface of the support frame 17 is parallel to the trestle after being connected with the trestle, an inclination sensor is arranged on the trestle, and the length of the leveling hydraulic cylinders 18 at the two sides is adjusted to keep the trestle horizontal according to the signal measured by the inclination sensor so as to adapt to the unevenness of the ground along the Y-axis direction.

The technical solution of the present invention is not limited to the above-mentioned specific embodiments, and many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. Crawler-type self-balancing reprinting bridge, including afterbody drive truss (1), annular conveyor belt (2) and belt actuating mechanism (3), its characterized in that: according to the material conveying trend from left to right, the front material receiving end is a tail, the rear material discharging end is a head, the belt driving mechanism (3) is installed in the tail driving truss (1), a II-type crawler chassis (5) is arranged at the front part below the tail driving truss (1), a I-type crawler chassis (4) is arranged at the rear part below the tail driving truss (1), the rear end of the tail driving truss (1) is rotatably connected with a middle conveying truss (7) through a hinge mechanism (8), a III-type crawler chassis (6) is arranged at the rear part below the middle conveying truss (7), the rear end of the middle conveying truss (7) is rotatably connected with a head discharging truss (9) through a hinge mechanism (8), a I-type crawler chassis (4) is arranged at the rear part below the head discharging truss (9), the tail driving truss (1), Middle conveying truss (7) and head ejection of compact truss (9) combination have constituted removal landing stage (10), it is provided with belt driven pulley (11) to remove landing stage (10) both ends, it is provided with a plurality of belt bearing rollers (12) to remove the cooperation on landing stage (10), annular conveyor belt (2) circulation is worn around whole removal landing stage (10) end to end and belt drive mechanism (3), belt drive mechanism (3) provide operating power for annular conveyor belt (2).

2. The crawler-type self-balancing transfer bridge of claim 1, wherein: the hinge mechanisms (8) are arranged at the end parts of the upper side beams at the two sides of the connection part of each truss, each group of hinge mechanisms (8) comprises a convex male part (801) fixedly connected on the front section truss and a concave female part (802) fixedly connected on the rear section truss in a matching way, a joint bearing (803) is embedded in the center of the male convex piece (801), bearing end covers (804) for preventing the joint bearing (803) from falling off are coaxially and fixedly arranged on two sides of the male convex piece (801), a V-shaped rubber sealing ring (805) is also arranged in the insertion gap of the convex male part (801) and the concave female part (802) at the periphery of the bearing end cover (804) in a matching way, a connecting pin shaft (806) is arranged in the knuckle bearing (803) in a penetrating and matching mode, two ends of the connecting pin shaft (806) are fixedly connected with shaft end baffles (807), and the two shaft end baffles (807) are fixedly connected with two outer side walls of the concave female part (802).

3. The crawler-type self-balancing transfer bridge of claim 1, wherein: II type crawler chassis (5) include crawler chassis (13), crawler chassis (13) top is provided with rotary platform (15), but through slewing bearing (14) swivelling joint between crawler chassis (13) and rotary platform (15), rotary platform (15) are through central hinge (16) rather than top support frame (17) swivelling joint, support frame (17) both ends upside is articulated rather than two lower boundary beams of top removal trestle (10) truss through connecting hinge (501), and, support frame (17) below four corners through four leveling pneumatic cylinders (18) with rotary platform (15) hinge joint.

4. The crawler-type self-balancing transfer bridge of claim 1, wherein: the III-type crawler chassis (6) comprises a crawler chassis (13), a rotary platform (15) is arranged above the crawler chassis (13), the crawler chassis (13) is rotatably connected with the rotary platform (15) through a rotary support (14), the rotary platform (15) is rotatably connected with a supporting frame (17) above the rotary platform through a central hinge shaft (16), vertical rail wheels a (601) are arranged on the upper sides of the two ends of the supporting frame (17), the lower sides of two lower beams of a truss of an upper movable trestle (10) are provided with longitudinal rails a (602) in a matching way, in addition, the outer sides of the two lower side beams are also provided with a transverse rail (603), the outer sides of the vertical rail wheels a (601) at the two ends of the support frame (17) are provided with horizontal rail wheels (604) used for preventing the vertical rail wheels a (601) from derailing in a matching way through L-shaped supports, and four corners below the supporting frame (17) are hinged with the rotary platform (15) through four leveling hydraulic cylinders (18).

5. The crawler-type self-balancing transfer bridge of claim 1, wherein: the I-type crawler chassis (4) comprises a crawler chassis (13), a rotary platform (15) is arranged above the crawler chassis (13), the crawler chassis (13) and the rotary platform (15) are rotatably connected through a rotary support (14), the rotary platform (15) is rotatably connected with a support frame (17) above the rotary platform through a central hinge shaft (16), a push-pull support (403) is fixedly connected above the support frame (17), support shafts (404) are fixedly connected at two ends of the push-pull support (403), a telescopic push-pull shaft sleeve (406) is sleeved on the periphery of each support shaft (404), a linear bearing (405) is arranged between each support shaft (404) and each push-pull shaft sleeve (406), a telescopic protective sleeve (407) is further connected between each push-pull shaft sleeve (406) and each push-pull support (403), and a vertical rail wheel b (401) is installed on the upper side of each push-pull, the lower sides of two lower beams of a truss of a movable trestle (10) above the movable trestle are matched and provided with longitudinal rails b (402), in addition, a limiting protrusion (408) is further fixedly arranged in the middle of a push-pull support (403), two limiting stop blocks (409) are symmetrically and fixedly arranged on the lower side surface of a connecting cross beam between the two lower beams of the truss in a matched mode, located on the limiting protrusion (408), on the two side surfaces of the connecting cross beam, and four corners below the support frame (17) are hinged to a rotary platform (15) through four leveling hydraulic cylinders (18).

6. The crawler-type self-balancing transfer bridge of any one of claims 3 to 5, wherein: one side of the crawler chassis (13) is provided with a control chamber (19) matched with the crawler chassis, and an electric control system and a hydraulic system of the corresponding crawler chassis (13) and the leveling hydraulic cylinder (18) are arranged in the control chamber (19).