Tracked chassis and engineering vehicles

Abstract

This invention relates to a tracked chassis and an engineering vehicle, wherein the tracked chassis includes a frame (1), a first track frame (2), a second track frame (3), a first drive unit (4), and a second drive unit (5). The first drive unit (4) is disposed between the frame (1) and the first track frame (2) and configured to drive the first track frame (2) to extend and retract relative to the frame (1) in a first direction. The second drive unit (5) is disposed between the frame (1) and the second track frame (3) and configured to drive the second track frame (3) to extend and retract relative to the frame (1) in the first direction, thereby adjusting the distance between the first track frame (2) and the second track frame (3) in the first direction. This invention, through the first drive unit and the second drive unit, enables adjustment of the distance between the first track frame and the second track frame in the first direction, thereby achieving width adjustment of the entire tracked chassis and meeting the needs of operation in confined spaces and relocation.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, and in particular to a tracked chassis and engineering vehicle. Background Technology

[0002] In recent years, with the continuous expansion of the application fields of aerial work platforms, traditional aerial work platforms with wheeled chassis can no longer meet the needs of various complex application scenarios. Aerial work platforms with tracked chassis have gradually emerged in the market due to their low ground pressure and strong ground adaptability.

[0003] Currently, most manufacturers directly apply the tracked chassis of excavators to aerial work platforms. However, the traditional tracked chassis structure of excavators has problems such as poor working capacity and large chassis size when working at high altitudes. In some special construction situations, it cannot meet the needs of working in narrow spaces and relocation.

[0004] It should be noted that the information disclosed in the background section of this invention is intended only to enhance the understanding of the overall background of this invention, and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] This invention provides a tracked chassis and an engineering vehicle, the width of which can be adjusted to meet the needs of working in narrow spaces and relocation.

[0006] According to one aspect of the present invention, a tracked chassis is provided, comprising:

[0007] Frame;

[0008] First track frame;

[0009] Second track frame;

[0010] A first drive unit, disposed between the vehicle frame and the first track frame and configured to drive the first track frame to extend and retract relative to the vehicle frame in a first direction; and

[0011] A second drive unit is disposed between the chassis and the second track frame and configured to drive the second track frame to extend and retract relative to the chassis in a first direction to adjust the distance between the first track frame and the second track frame in the first direction.

[0012] In some embodiments, the frame includes a frame body and a first support beam and a second support beam respectively disposed on both sides of the frame body. The first track frame includes a first track frame body and a first connecting portion disposed on the first track frame body near the second track frame. The second track frame includes a second track frame body and a second connecting portion disposed on the second track frame body near the first track frame. The first connecting portion includes a first hollow portion, and the second connecting portion includes a second hollow portion. The first support beam is inserted into the first hollow portion, and the second support beam is inserted into the second hollow portion.

[0013] In some embodiments, a first drive unit is connected between the vehicle frame body and the first track frame body, and a second drive unit is connected between the vehicle frame body and the second track frame body.

[0014] In some embodiments, a first mounting seat is provided inside the chassis body, a second mounting seat is provided inside the first track frame body, and a third mounting seat is provided inside the second track frame body. A first drive unit is mounted on the first mounting seat and the second mounting seat, and a second drive unit is mounted on the first mounting seat and the third mounting seat.

[0015] In some embodiments, the inner surface of the first hollow portion is provided with a first wear-resistant plate and / or the outer surface of the first support beam is provided with a second wear-resistant plate; and / or, the inner surface of the second hollow portion is provided with a third wear-resistant plate and / or the outer surface of the second support beam is provided with a fourth wear-resistant plate.

[0016] In some embodiments, the tracked chassis further includes:

[0017] The first leg;

[0018] The second leg;

[0019] A third drive unit, disposed between the frame and the first outrigger and configured to drive the first outrigger to extend and retract relative to the frame in a first direction, so as to support the tracked chassis via the first outrigger when it is extended; and

[0020] A fourth drive unit is disposed between the frame and the second leg and configured to drive the second leg to extend and retract relative to the frame in a first direction, so as to support the tracked chassis by means of the second leg when the second leg is extended.

[0021] In some embodiments, the frame includes a frame body and a first support beam and a second support beam respectively disposed on both sides of the frame body. The first support beam includes a third hollow portion, and the second support beam includes a fourth hollow portion. The first leg includes a first leg portion and a first telescopic portion connected to the first leg portion. The first leg portion is disposed on the side of the first track frame away from the second track frame. The first telescopic portion passes through the first track frame and is inserted into the third hollow portion. The second leg includes a second leg portion and a second telescopic portion connected to the second leg portion. The second leg portion is disposed on the side of the second track frame away from the first track frame. The second telescopic portion passes through the second track frame and is inserted into the fourth hollow portion.

[0022] In some embodiments, the first track frame includes a first track frame body and a first connecting portion disposed on the first track frame body near the second track frame, the second track frame includes a second track frame body and a second connecting portion disposed on the second track frame body near the first track frame, the first connecting portion includes a first hollow portion, the second connecting portion includes a second hollow portion, a first support beam is inserted into the first hollow portion, a second support beam is inserted into the second hollow portion, a first telescopic portion passes through the first hollow portion and is inserted into a third hollow portion, and a second telescopic portion passes through the second hollow portion and is inserted into a fourth hollow portion.

[0023] In some embodiments, the third drive unit is connected between the first support beam and the first telescopic part and is located inside the third hollow part, the first track frame and the first telescopic part, and the fourth drive unit is connected between the second support beam and the second telescopic part and is located inside the fourth hollow part, the second track frame and the second telescopic part.

[0024] In some embodiments, a fourth mounting seat is provided inside the first support beam, a fifth mounting seat is provided inside the second support beam, a sixth mounting seat is provided inside the first telescopic part, a seventh mounting seat is provided inside the second telescopic part, a third driving device is mounted on the fourth and sixth mounting seats, and a fourth driving device is mounted on the fifth and seventh mounting seats.

[0025] In some embodiments, the outer surface of the first telescopic portion is provided with a fifth wear-resistant plate and / or the inner surface of the third hollow portion is provided with a sixth wear-resistant plate; and / or, the outer surface of the second telescopic portion is provided with a seventh wear-resistant plate and / or the inner surface of the fourth hollow portion is provided with an eighth wear-resistant plate.

[0026] In some embodiments, the first outrigger includes a fifth drive device and a first support base, the fifth drive device being connected between the first telescopic portion and the first support base, the fifth drive device being configured to drive the first support base to move vertically relative to the first telescopic portion to adjust the ground clearance of the first support base; and / or, the second outrigger includes a sixth drive device and a second support base, the sixth drive device being connected between the second telescopic portion and the second support base, the sixth drive device being configured to drive the second support base to move vertically relative to the second telescopic portion to adjust the ground clearance of the second support base.

[0027] In some embodiments, the first telescopic portion includes a first telescopic body and a first swing portion. The first telescopic body passes through the first track frame and is inserted into the third hollow portion. One end of the first swing portion is connected to the first support leg, and the other end of the first swing portion is rotatably connected to the first telescopic body so that the included angle between the first telescopic body and the first swing portion is adjustable. And / or, the second telescopic portion includes a second telescopic body and a second swing portion. The second telescopic body passes through the second track frame and is inserted into the fourth hollow portion. One end of the second swing portion is connected to the second support leg, and the other end of the second swing portion is rotatably connected to the second telescopic body so that the included angle between the second telescopic body and the second swing portion is adjustable.

[0028] In some embodiments, the first telescopic portion further includes a first limiting device configured to maintain the relative fixation of the first telescopic body and the first swing portion after adjusting the included angle between the first telescopic body and the first swing portion; and / or, the second telescopic portion further includes a second limiting device configured to maintain the relative fixation of the second telescopic body and the second swing portion after adjusting the included angle between the second telescopic body and the second swing portion.

[0029] According to another aspect of the present invention, an engineering vehicle is provided, comprising the tracked chassis described above.

[0030] Based on the above technical solution, the embodiments of the present invention can drive the first track frame to extend and retract relative to the vehicle frame in a first direction through the first driving device, and drive the second track frame to extend and retract relative to the vehicle frame in the first direction through the second driving device, thereby adjusting the distance between the first track frame and the second track frame in the first direction, realizing the adjustment of the width of the entire tracked chassis in the first direction. Thus, the width of the engineering vehicle using the tracked chassis in the first direction can be adjusted according to the width of the on-site working environment to meet the needs of working in narrow spaces. At the same time, the engineering vehicle using the tracked chassis can also adjust the width in the first direction according to the road driving requirements to meet the needs of relocation. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0032] Figure 1 This is a schematic diagram of the structure of an embodiment of the tracked chassis of the present invention in the first working state.

[0033] Figure 2 This is an exploded view of one embodiment of the tracked chassis of the present invention.

[0034] Figure 3 This is a schematic diagram of the chassis structure in one embodiment of the tracked chassis of the present invention.

[0035] Figure 4 This is a front view of the chassis in one embodiment of the tracked chassis of the present invention.

[0036] Figure 5 This is a first-view schematic diagram of the first track frame in one embodiment of the tracked chassis of the present invention.

[0037] Figure 6 This is a second-view schematic diagram of the first track frame in one embodiment of the tracked chassis of the present invention.

[0038] Figure 7 This is a schematic diagram of the structure of the first leg in one embodiment of the tracked chassis of the present invention.

[0039] Figure 8 This is a side view of the first leg in one embodiment of the tracked chassis of the present invention.

[0040] Figure 9 This is a schematic diagram of the structure of an embodiment of the tracked chassis of the present invention in a second working state.

[0041] Figure 10 This is a structural schematic diagram of an embodiment of the tracked chassis of the present invention in a third working state.

[0042] Figure 11 This is a schematic diagram of the structure of the first leg in another embodiment of the tracked chassis of the present invention.

[0043] Figure 12 This is a schematic diagram of another embodiment of the tracked chassis of the present invention in the first working state.

[0044] Figure 13 This is a structural schematic diagram of another embodiment of the tracked chassis of the present invention in a second working state.

[0045] Figure 14 This is a structural schematic diagram of another embodiment of the tracked chassis of the present invention in a third working state.

[0046] Figure 15 This is a structural schematic diagram of another embodiment of the tracked chassis of the present invention in the fourth working state.

[0047] Figure 16 This is a structural schematic diagram of another embodiment of the tracked chassis of the present invention in the fifth working state of the tracked chassis.

[0048] In the picture:

[0049] 1. Chassis; 11. Chassis body; 12. First support beam; 13. Second support beam; 14. Second wear-resistant plate; 15. Fourth wear-resistant plate; 16. Sixth wear-resistant plate; 17. First mounting seat; 18. Fourth mounting seat; 2. First track frame; 21. First track frame body; 22. First connecting part; 23. First wear-resistant plate; 24. First support plate; 25. Second mounting seat; 3. Second track frame; 4. First drive unit; 5. Second drive unit; 6. First outrigger; 61. First outrigger part; 611. Fifth drive unit; 612. First support seat; 62. First telescopic part; 621. First telescopic body; 622. First swing part; 63. Sixth mounting seat; 7. Second outrigger; 8. Third drive unit; 9. Fourth drive unit. Detailed Implementation

[0050] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0051] In the description of this invention, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0052] like Figure 1As shown, in some embodiments of the tracked chassis provided by the present invention, the tracked chassis includes a frame 1, a first track frame 2, a second track frame 3, a first drive device 4, and a second drive device 5. The first drive device 4 is disposed between the frame 1 and the first track frame 2, and is configured to drive the first track frame 2 to extend and retract relative to the frame 1 in a first direction. The second drive device 5 is disposed between the frame 1 and the second track frame 3, and is configured to drive the second track frame 3 to extend and retract relative to the frame 1 in the first direction, so as to adjust the distance between the first track frame 2 and the second track frame 3 in the first direction.

[0053] In the above embodiment, the first drive device 4 can drive the first track frame 2 to extend and retract relative to the vehicle frame 1 in a first direction, and the second drive device 5 can drive the second track frame 3 to extend and retract relative to the vehicle frame 1 in the first direction. This allows the distance between the first track frame 2 and the second track frame 3 to be adjusted in the first direction, thereby adjusting the width of the entire tracked chassis in the first direction. This enables the width of the engineering vehicle using the tracked chassis to be adjusted according to the width of the on-site working environment, meeting the needs of working in narrow spaces. At the same time, the engineering vehicle using the tracked chassis can also adjust its width in the first direction according to road driving requirements, meeting the needs of relocation.

[0054] In this embodiment of the invention, the tracked chassis includes two drive devices (i.e., a first drive device 4 and a second drive device 5), which can respectively drive the first track frame 2 and the second track frame 3 to extend and retract relative to the chassis 1 in a first direction. This distributes the width change of the tracked chassis in the first direction across the two track frames (i.e., the first track frame 2 and the second track frame 3), rather than having it borne by a single track frame. Compared to technical solutions where the width change of the tracked chassis in the first direction is borne by a single track frame, this embodiment of the invention distributes the width change of the tracked chassis in the first direction across the two track frames. This allows the tracked chassis to maintain symmetry and balance within a limited working space, avoiding any impact on work operations caused by the tracked chassis's inability to maintain symmetry and balance within the limited working space.

[0055] Moreover, by setting two driving devices (i.e., the first driving device 4 and the second driving device 5), the driving force on the two track frames can be distributed. When the width adjustment is the same in the first direction, compared with the technical solution of using one driving device to drive one track frame to move continuously to one side, the embodiment of the present invention uses two driving devices to drive the two track frames to move to both sides respectively, which can effectively reduce the specifications and size of the driving devices and help reduce costs.

[0056] like Figure 3As shown, in some embodiments, the frame 1 includes a frame body 11 and a first support beam 12 and a second support beam 13 respectively disposed on both sides of the frame body 11. The first track frame 2 includes a first track frame body 21 and a first connecting portion 22 disposed on the first track frame body 21 near the second track frame 3. The second track frame 3 includes a second track frame body and a second connecting portion disposed on the second track frame body near the first track frame 2. The first connecting portion 22 includes a first hollow portion, and the second connecting portion includes a second hollow portion. The first support beam 12 is inserted into the first hollow portion, and the second support beam 13 is inserted into the second hollow portion.

[0057] The frame 1 and the first track frame 2, as well as the frame 1 and the second track frame 3, adopt a nested structure, which can reliably realize the extension and retraction of the first track frame 2 and the second track frame 3 relative to the frame 1, and occupy less space.

[0058] To achieve nested fit between the chassis 1 and the first track frame 2, as well as between the chassis 1 and the second track frame 3, the first connecting part 22 of the first track frame 2 is fitted into the outside of the first support beam 12 through the first hollow part, and the second connecting part of the second track frame 3 is fitted into the outside of the second support beam 13 through the second hollow part. When the first track frame 2 and the second track frame 3 are retracted relative to the chassis 1, the first support beam 12 extends into the interior of the first hollow part of the first connecting part 22, and the second support beam 13 extends into the interior of the second hollow part of the second connecting part. This effectively shortens the distance between the first track frame 2 and the second track frame 3, and leaves no other structures on the sides of the first track frame 2 and the second track frame 3 that are far from each other. In other words, it can also shorten the width of the entire track chassis in the first direction, thereby truly realizing the reduction of the width of the entire track chassis and meeting the requirements for operation in narrow spaces.

[0059] In some embodiments, the first drive unit 4 is connected between the frame body 11 and the first track frame body 21, and the second drive unit 5 is connected between the frame body 11 and the second track frame body.

[0060] By connecting the first drive unit 4 between the frame body 11 and the first track frame body 21, and connecting the second drive unit 5 between the frame body 11 and the second track frame body, the first drive unit 4 can drive the first track frame 2 and the second drive unit 5 can drive the second track frame 3. At the same time, it is beneficial to reasonably arrange the positions of the first drive unit 4 and the second drive unit 5, and avoid the first drive unit 4 and the second drive unit 5 occupying too much space.

[0061] like Figure 4 and Figure 6As shown, in some embodiments, the chassis body 11 is provided with a first mounting seat 17 inside, the first track frame body 21 is provided with a second mounting seat 25 inside, the second track frame body is provided with a third mounting seat inside, the first drive device 4 is mounted on the first mounting seat 17 and the second mounting seat 25, and the second drive device 5 is mounted on the first mounting seat 17 and the third mounting seat.

[0062] By setting the first mounting base 17, the second mounting base 25 and the third mounting base, at least a portion of the first drive device 4 and the second drive device 5 can be disposed inside the chassis body 11, and at least another portion of the first drive device 4 and the second drive device 5 can be disposed inside the first track frame body 21 and the second track frame body, respectively, thereby minimizing the space occupied by the first drive device 4 and the second drive device 5 individually, and thus reducing the size of the entire track chassis.

[0063] Moreover, the first drive unit 4 and the second drive unit 5 are located on both sides of the chassis body 11, and can share the first mounting seat 17, thereby effectively reducing the total number of mounting seats used to support the first drive unit 4 and the second drive unit 5, effectively reducing the number of parts and the space occupied, thereby effectively controlling the cost and the size of the entire tracked chassis.

[0064] like Figure 3 and Figure 5 As shown, in some embodiments, the inner surface of the first hollow portion is provided with a first wear-resistant plate 23 and / or the outer surface of the first support beam 12 is provided with a second wear-resistant plate 14; and / or, the inner surface of the second hollow portion is provided with a third wear-resistant plate and / or the outer surface of the second support beam 13 is provided with a fourth wear-resistant plate 15.

[0065] By setting the first wear-resistant plate 23, the second wear-resistant plate 14, the third wear-resistant plate and the fourth wear-resistant plate 15, the wear on the first support beam 12, the second support beam 13, the first connecting part and the second connecting part can be effectively reduced when the first track frame 2 and the second track frame 3 move relative to the vehicle frame 1, thereby improving the service life of the vehicle frame 1, the first track frame 2 and the second track frame 3.

[0066] like Figure 2 As shown, in some embodiments, the tracked chassis further includes a first outrigger 6, a second outrigger 7, a third drive unit 8, and a fourth drive unit 9. The third drive unit 8 is disposed between the frame 1 and the first outrigger 6, and is configured to drive the first outrigger 6 to extend and retract relative to the frame 1 in a first direction to support the tracked chassis through the first outrigger 6 when it is extended. The fourth drive unit 9 is disposed between the frame 1 and the second outrigger 7, and is configured to drive the second outrigger 7 to extend and retract relative to the frame 1 in a first direction to support the tracked chassis through the second outrigger 7 when it is extended.

[0067] By setting a first extendable leg 6 and a second extendable leg 7 that are retractable relative to the chassis 1, the tracked chassis can be adjusted from being supported by the track frame to being supported by the extendable legs as needed, and the width of the extendable leg support is adjustable to meet different operational requirements. Furthermore, the width of the tracked chassis can also be adjusted by extending and retracting the first extendable leg 6 and the second extendable leg 7, thus working together with the first track frame 2 and the second track frame 3 to handle the width adjustment of the tracked chassis. Additionally, after setting the first extendable leg 6 and the second extendable leg 7, the width between the first track frame 2 and the second track frame 3 can be set smaller, effectively reducing the overall minimum width of the tracked chassis.

[0068] In some embodiments, the frame 1 includes a frame body 11 and a first support beam 12 and a second support beam 13 respectively disposed on both sides of the frame body 11. The first support beam 12 includes a third hollow portion, and the second support beam 13 includes a fourth hollow portion. The first outrigger 6 includes a first outrigger portion 61 and a first telescopic portion 62 connected to the first outrigger 61. The first outrigger 61 is disposed on the side of the first track frame 2 away from the second track frame 3. The first telescopic portion 62 passes through the first track frame 2 and is inserted into the third hollow portion. The second outrigger 7 includes a second outrigger and a second telescopic portion connected to the second outrigger. The second outrigger is disposed on the side of the second track frame 3 away from the first track frame 2. The second telescopic portion passes through the second track frame 3 and is inserted into the fourth hollow portion.

[0069] By passing the first telescopic part 62 of the first outrigger 61 through the first track frame 2 and inserting it into the third hollow part, and by passing the second telescopic part of the second outrigger 7 through the second track frame 3 and inserting it into the fourth hollow part, the first outrigger 6 and the second outrigger 7 can also adopt a nested installation structure. This allows the first outrigger 6 to be hidden inside the first track frame 2 and the first support beam 12 of the chassis 1, and the second outrigger 7 to be hidden inside the second track frame 3 and the second support beam 13 of the chassis 1. This greatly saves the space occupied by the first outrigger 6 and the second outrigger 7 and effectively controls the structural dimensions of the entire tracked chassis.

[0070] In some embodiments, the first telescopic portion 62 of the first outrigger 61 passes through the first hollow portion of the first connecting portion 22 on the first track frame 2 and is inserted into the third hollow portion, and the second telescopic portion of the second outrigger 7 passes through the second hollow portion of the second connecting portion on the second track frame 3 and is inserted into the fourth hollow portion, thereby realizing the double nesting of the first outrigger 6, the first track frame 2 and the first support beam 12, as well as the double nesting of the second outrigger 7, the second track frame 3 and the second support beam 13, thereby greatly improving the structural compactness of the tracked chassis and reducing the overall size of the tracked chassis.

[0071] In some embodiments, the third drive device 8 is connected between the first support beam 12 and the first telescopic part 62, and the third drive device 8 is located inside the third hollow part, the first track frame 2 and the first telescopic part 62. The fourth drive device 9 is connected between the second support beam 13 and the second telescopic part, and the fourth drive device 9 is located inside the fourth hollow part, the second track frame 3 and the second telescopic part.

[0072] By connecting the third drive device 8 between the first support beam 12 and the first telescopic part 62, and connecting the fourth drive device 9 between the second support beam 13 and the second telescopic part, the driving action of the third drive device 8 on the first telescopic part 62 and the driving action of the fourth drive device 9 on the second telescopic part can be realized. At the same time, it is beneficial to reasonably arrange the positions of the third drive device 8 and the fourth drive device 9, and avoid the third drive device 8 and the fourth drive device 9 occupying too much space.

[0073] Moreover, the third drive unit 8 is located inside the third hollow part, the first track frame 2 and the first telescopic part 62, and the fourth drive unit 9 is located inside the fourth hollow part, the second track frame 3 and the second telescopic part. This can effectively prevent the third drive unit 8 and the fourth drive unit 9 from occupying other space besides the frame 1, the first track frame 2, the second track frame 3, the first outrigger 6 and the second outrigger 7. This is conducive to making the structure of the entire track chassis more compact and reducing the size of the entire track chassis.

[0074] like Figure 4 and Figure 8 As shown, in some embodiments, the first support beam 12 is provided with a fourth mounting seat 18 inside, the second support beam 13 is provided with a fifth mounting seat inside, the first telescopic part 62 is provided with a sixth mounting seat 63 inside, the second telescopic part is provided with a seventh mounting seat inside, the third drive device 8 is mounted on the fourth mounting seat 18 and the sixth mounting seat 63, and the fourth drive device 9 is mounted on the fifth mounting seat and the seventh mounting seat.

[0075] By placing the fourth mounting base 18 inside the first support beam 12, placing the sixth mounting base 63 inside the first telescopic part 62, and mounting the third drive device 8 on the fourth mounting base 18 and the sixth mounting base 63, the third drive device 8 can be located inside the frame 1, the first track frame 2, and the first outrigger 6. By placing the fifth mounting base inside the second support beam 13, placing the seventh mounting base inside the second telescopic part, and mounting the fourth drive device 9 on the fifth mounting base and the seventh mounting base, the fourth drive device 9 can be located inside the frame 1, the second track frame 3, and the second outrigger 7.

[0076] In some embodiments, the outer surface of the first telescopic portion 62 is provided with a fifth wear-resistant plate and / or the inner surface of the third hollow portion is provided with a sixth wear-resistant plate 16; and / or, the outer surface of the second telescopic portion is provided with a seventh wear-resistant plate and / or the inner surface of the fourth hollow portion is provided with an eighth wear-resistant plate.

[0077] By setting the fifth wear-resistant plate, the sixth wear-resistant plate 16, the seventh wear-resistant plate and the eighth wear-resistant plate, the wear on the first outrigger 6 and the first track frame 2 when the first outrigger 6 moves relative to the first track frame 2, and the wear on the second outrigger 7 and the second track frame 3 when the second outrigger 7 moves relative to the second track frame 3, thereby improving the service life of the first outrigger 6, the second outrigger 7, the first track frame 2 and the second track frame 3.

[0078] like Figure 7 and Figure 8 As shown, in some embodiments, the first leg 61 includes a fifth drive device 611 and a first support base 612. The fifth drive device 611 is connected between the first telescopic portion 62 and the first support base 612. The fifth drive device 611 is configured to drive the first support base 612 to move vertically relative to the first telescopic portion 62 to adjust the ground clearance of the first support base 612; and / or, the second leg includes a sixth drive device and a second support base. The sixth drive device is connected between the second telescopic portion and the second support base. The sixth drive device is configured to drive the second support base to move vertically relative to the second telescopic portion to adjust the ground clearance of the second support base.

[0079] By setting up the fifth drive device 611 and the sixth drive device, the ground clearance of the first support 612 and the second support can be adjusted, so that both the first support 612 and the second support can touch the ground according to the ground level. Moreover, the ground clearance of the first support 612 and the second support is driven by different drive devices, which allows the first support 612 and the second support to adjust their ground clearance independently according to the ground level, without having to keep the ground clearance of the first support 612 and the second support the same, thus avoiding the situation where one side of the ground is lower and one of the support cannot touch the ground.

[0080] like Figure 11As shown, in some embodiments, the first telescopic portion 62 includes a first telescopic body 621 and a first swing portion 622. The first telescopic body 621 passes through the first track frame 2 and is inserted into the third hollow portion. One end of the first swing portion 622 is connected to the first support leg 61, and the other end of the first swing portion 622 is rotatably connected to the first telescopic body 621 so that the included angle between the first telescopic body 621 and the first swing portion 622 is adjustable. And / or, the second telescopic portion includes a second telescopic body and a second swing portion. The second telescopic body passes through the second track frame 3 and is inserted into the fourth hollow portion. One end of the second swing portion is connected to the second support leg, and the other end of the second swing portion is rotatably connected to the second telescopic body so that the included angle between the second telescopic body and the second swing portion is adjustable.

[0081] By setting a first swing part 622 that can rotate relative to the first telescopic body 621 and a second swing part that can rotate relative to the second telescopic body, the first leg 6 and the second leg 7 can have more postures. Moreover, the swing of the first swing part 622 relative to the first telescopic body 621 and the swing of the second swing part relative to the second telescopic body can adjust the total length of the first leg 6 and the second leg 7, thereby adjusting the width of the tracked chassis in the first direction and meeting more requirements of the working environment.

[0082] In some embodiments, the first telescopic portion 62 further includes a first limiting device configured to maintain the relative fixation of the first telescopic body 621 and the first swing portion 622 after adjusting the included angle between the first telescopic body 621 and the first swing portion 622; and / or, the second telescopic portion further includes a second limiting device configured to maintain the relative fixation of the second telescopic body and the second swing portion after adjusting the included angle between the second telescopic body and the second swing portion.

[0083] By setting the first limiting device and the second limiting device, the relative fixation of the first telescopic body 621 and the first swing part 622 can be maintained after adjusting the included angle between the first telescopic body 621 and the first swing part 622, and the relative fixation of the second telescopic body and the second swing part can be maintained after adjusting the included angle between the second telescopic body and the second swing part, so as to prevent the first telescopic body 621 and the first swing part 622, as well as the second telescopic body and the second swing part, from undergoing unexpected relative rotation.

[0084] Based on the tracked chassis described above, the present invention also proposes an engineering vehicle that includes the tracked chassis described above.

[0085] The positive technical effects of the tracked chassis in the above embodiments are also applicable to engineering vehicles, and will not be repeated here.

[0086] The following is in conjunction with the appendix Figures 1 to 16The structure and working mode of one embodiment of the tracked chassis of the present invention will be described as follows:

[0087] like Figure 1 and Figure 2 As shown, the tracked chassis includes a frame 1, a first track frame 2, a second track frame 3, a first drive unit 4, a second drive unit 5, a first outrigger 6, a second outrigger 7, a third drive unit 8, and a fourth drive unit 9.

[0088] The first track frame 2 and the second track frame 3 are symmetrically arranged on the left and right sides of the chassis 1. The first drive unit 4 and the second drive unit 5 are symmetrically arranged on the left and right sides, respectively located between the chassis 1 and the first track frame 2 and between the chassis 1 and the second track frame 3.

[0089] There are two first legs 6 and two second legs 7. The two first legs 6 and the two second legs 7 are arranged symmetrically from left to right, and most of them are concealed within the first track frame 2, the second track frame 3, and the chassis 1, and can extend and retract laterally relative to the chassis 1. The two third drive units 8 and the two fourth drive units 9 are arranged symmetrically from left to right, and are respectively concealed within the chassis 1, the first track frame 2, and the first legs 6, as well as the chassis 1, the second track frame 3, and the second legs 7, and are used to realize the lateral extension and retraction of the first legs 6 and the second legs 7, respectively.

[0090] like Figure 3 and Figure 4As shown, the frame 1 includes a frame body 11, a first support beam 12, a second support beam 13, a second wear-resistant plate 14, a fourth wear-resistant plate 15, a sixth wear-resistant plate 16, a first mounting base 17, and a fourth mounting base 18. The frame body 11 is generally cylindrical and supports the upper part of the entire vehicle. Two first support beams 12 and two second support beams 13 are welded around the frame body 11. The two first support beams 12 and two second support beams 13 are arranged symmetrically from left to right to support the telescopic movement of the first track frame 2, the second track frame 3, the first outrigger 6, and the second outrigger 7. The three outer surfaces (top, bottom, and outer side) of the first support beam 12 are respectively provided with second wear-resistant plates 14. The first track frame 2 is fitted onto the outside of the first support beam 12, and the second wear-resistant plates 14 on the first support beam 12 are used to support the track-changing telescopic movement of the first track frame 2. Similarly, the three outer surfaces (top, bottom, and outer side) of the second support beam 13 are each provided with a fourth wear-resistant plate 15. The second track frame 3 is fitted onto the outside of the second support beam 13, and the fourth wear-resistant plates 15 on the second support beam 13 are used to support the track-changing extension and retraction of the second track frame 3. The four inner surfaces (top, bottom, and left and right sides) of the first support beam 12 are each provided with a sixth wear-resistant plate 16. The first leg 6 is inserted into the interior of the first support beam 12, and the four sixth wear-resistant plates 16 inside the first support beam 12 are used to support the extension and retraction of the first leg 6. Similarly, the four inner surfaces (top, bottom, and left and right sides) of the second support beam 13 are each provided with an eighth wear-resistant plate (not shown in the figure). The second leg 7 is inserted into the interior of the second support beam 13, and the four eighth wear-resistant plates inside the second support beam 13 are used to support the extension and retraction of the second leg 7.

[0091] A first mounting base 17 is provided in the middle of the frame body 11, and the first drive device 4 and the second drive device 5 are symmetrically connected to the left and right sides respectively, so as to realize the track-changing extension and retraction of the first track frame 2 and the second track frame 3.

[0092] Each of the two first support beams 12 has a fourth mounting seat 18 inside, and each of the two second support beams 13 has a fifth mounting seat (not shown in the figure) inside. The two fourth mounting seats 18 and the two fifth mounting seats are welded to the frame body 11 as a whole. The fourth mounting seats 18 are used to support the third drive device 8 to realize the telescopic movement of the first outrigger 6, and the fifth mounting seats are used to support the fourth drive device 9 to realize the telescopic movement of the second outrigger 7.

[0093] like Figure 5 and Figure 6As shown, the first track frame 2 includes a first track frame body 21, a first connecting part 22, a first wear-resistant plate 23, a first support plate 24, and a second mounting base 25. The first track frame body 21 supports the entire first track frame 2. Two first connecting parts 22 are arranged front and rear on the side of the first track frame body 21 near the second track frame 3. The first connecting parts 22 are used to realize the track-changing extension and retraction of the first track frame 2. The three inner surfaces (top, bottom, and inner side) of the first connecting part 22 are respectively provided with the first wear-resistant plate 23. The first wear-resistant plate 23 cooperates with the second wear-resistant plate 14 on the first support beam 12 of the frame 1 to support the track-changing extension and retraction of the first track frame 2 relative to the frame 1. The upper and lower parts of the first connecting part 22 away from the second track frame 3 are also respectively equipped with the first support plate 24, which provides support for the first outrigger 6. A second mounting base 25 is provided between the two first connecting parts 22. The second mounting base 25 cooperates with the first mounting base 17 to install the first drive device 4, so as to realize the track-changing extension and retraction of the first track frame 2 relative to the frame 1.

[0094] One end of the first drive unit 4 is connected to the first mounting base 17, and the other end is connected to the second mounting base 25, for realizing the track-changing extension and retraction of the first track frame 2 relative to the vehicle frame 1. One end of the second drive unit 5 is connected to the first mounting base 17, and the other end is connected to the third mounting base disposed on the second support beam 13, for realizing the track-changing extension and retraction of the second track frame 3 relative to the vehicle frame 1.

[0095] The structure of the second track frame 3 is basically the same as that of the first track frame 2, and will not be described in detail here.

[0096] The third drive unit 8 is concealed within the first support beam 12 and the first support leg 6. One end of the third drive unit 8 is connected to the fourth mounting base 18, and the other end is connected to the sixth mounting base 63 within the first support leg 6, for enabling the extension and retraction of the first support leg 6 relative to the frame 1. The fourth drive unit 9 is concealed within the second support beam 13 and the second support leg 7. One end of the fourth drive unit 9 is connected to the fifth mounting base, and the other end is connected to the seventh mounting base within the second support leg 7, for enabling the extension and retraction of the second support leg 7 relative to the frame 1.

[0097] like Figure 7 and Figure 8 As shown, the first support leg 6 includes a first support leg portion 61, a first telescopic portion 62, and a sixth mounting base 63. The four outer surfaces of the first telescopic portion 62 (upper, lower, left, and right) cooperate with the four sixth wear-resistant plates 16 on the inner side of the first support beam 12. The sixth mounting base 63 is welded inside the first telescopic portion 62 and cooperates with the fourth mounting base 18 to mount the third drive device 8, which is used to realize the telescopic movement of the first support leg 6 relative to the frame 1.

[0098] The first leg 61 and the first telescopic part 62 are fixedly connected by two pins. The first leg 61 includes a fifth drive device 611 and a first support base 612. The fifth drive device 611 drives the first support base 612 to move vertically to adjust its height off the ground and ensure that the first support base 612 can touch the ground.

[0099] The second leg 7 and the first leg 6 have basically the same structure, so they will not be described in detail here.

[0100] The two first legs 6 and the two second legs 7 can work together to support the entire tracked chassis.

[0101] In the entire tracked chassis, the first support beam 12 is nested inside the first connecting part 22, and the first telescopic part 62 is nested inside the first support beam 12, forming a two-level nested structure, which enables the tracked chassis to operate more flexibly and greatly improves its adaptability to the working environment.

[0102] like Figure 1 As shown, this is the first working state of the tracked chassis. At this time, the first track frame 2, the second track frame 3, the two first outriggers 6 and the two second outriggers 7 are all retracted relative to the chassis 1. In this state, the size of the entire tracked chassis is the smallest. The whole machine is supported by the first track frame 2 and the second track frame 3. When moving, it can pass through narrower spaces and has the ability to move and work in narrow spaces.

[0103] like Figure 9 As shown, this is the second working state of the tracked chassis. In this state, the first track frame 2 and the second track frame 3 are both extended relative to the chassis 1. Although the two first outriggers 6 and the two second outriggers 7 are not extended relative to the first track frame 2 and the second track frame 3 respectively, they are partially extended relative to the chassis 1, and the first outriggers 6 and the second outriggers 7 do not support the ground. In this state, the overall size of the tracked chassis is wider than in the first working state, resulting in better overall operational stability. When the tracked chassis is in the second working state, the entire machine is supported by the first track frame 2 and the second track frame 3, and it still has the ability to move and operate simultaneously.

[0104] like Figure 10 As shown, this is the third working state of the tracked chassis. At this state, the first track frame 2, the second track frame 3, the two first outriggers 6, and the two second outriggers 7 are all extended relative to the chassis 1. The tracked chassis is at its largest size in this state. When the machine is working, it is supported by the first support seat 612 in the two first outriggers 6 and the second support seat in the two second outriggers 7. The machine does not have the ability to work while walking, but it can achieve maximum working stability, and the machine has stronger working ability and a larger working range.

[0105] Two points need to be clarified here:

[0106] 1. In order to achieve the third working state of the tracked chassis, the first track frame 2 and the second track frame 3 can be fully extended. At this time, the first support plate 24 and the first support beam 12 on the first track frame 2 jointly support the first telescopic part 62 in the first outrigger 6. The first outrigger 6 can be fully extended relative to the frame 1. The second support plate and the second support beam 13 on the second track frame 3 jointly support the second telescopic part in the second outrigger 7. The second outrigger 7 can be fully extended relative to the frame 1, and the structural strength is higher.

[0107] 2. Based on the available space in the working environment, by adjusting the extension of the third drive device 8 and the fourth drive device 9, and using the first support seat 612 in the two first legs 6 and the second support seat in the two second legs 7 to support the ground, a variety of intermediate working states between the third working state and the second working state of the tracked chassis can be realized.

[0108] The tracked chassis structure can achieve multiple operating states by controlling the first drive unit 4, the second drive unit 5, two third drive units 8, two fourth drive units 9, two fifth drive units 611, and two sixth drive units.

[0109] The specific control methods for the three commonly used operation states are as follows:

[0110] 1. First operating status:

[0111] The first drive unit 4, the second drive unit 5, the two third drive units 8, the two fourth drive units 9, the two fifth drive units 611 and the two sixth drive units are all in the fully retracted state, so that the tracked chassis is in the first working state. At this time, the whole machine is supported by the ground through the first track frame 2 and the second track frame 3. When walking, it can pass through narrower spaces and has the ability to walk and work in narrow spaces.

[0112] 2. Second operating status:

[0113] Controlling the two third drive units 8, two fourth drive units 9, two fifth drive units 611, and two sixth drive units to the fully retracted state, and controlling the first drive unit 4 and the second drive unit 5 to the fully extended state, enables the tracked chassis to be in the second working state. In this state, the overall size of the tracked chassis is wider than that in the first working state, and the overall working stability of the machine is better. When the tracked chassis is in the second working state, the whole machine is supported on the ground by the first track frame 2 and the second track frame 3, and it also has the ability to move and work at the same time.

[0114] 3. Third operating status:

[0115] The first drive unit 4, the second drive unit 5, the two third drive units 8, the two fourth drive units 9, the two fifth drive units 611, and the two sixth drive units are all in a fully extended state, realizing that the tracked chassis is in the third working state. In this state, the size of the entire tracked chassis is the largest. When the whole machine is working, it is supported by the first support seat 612 in the two first outriggers 6 and the second support seat in the two second outriggers 7. The whole machine does not have the ability to walk and work at the same time, but the whole machine can achieve the maximum working stability, and the whole machine has stronger working ability and a larger working range.

[0116] like Figure 11 As shown, to further improve the operational capability and stability of the tracked chassis, the structure of the first outrigger 6 can be further deformed. In this embodiment, the first telescopic part 62 in the first outrigger 6 includes a first telescopic body 621 and a first swing part 622. The four outer surfaces of the first telescopic body 621 (upper, lower, left, and right) cooperate with the four sixth wear-resistant plates 16 on the inner side of the first support beam 12. The sixth mounting seat 63 is welded inside the first telescopic body 621 and cooperates with the fourth mounting seat 18 to install the third drive device 8, which is used to realize the telescopic movement of the first outrigger 6 relative to the frame 1.

[0117] The first swing part 622 is hinged to the first telescopic body 621 by a pin. The first swing part 622 can switch between at least three positions relative to the first telescopic body 621. The first swing part 622 is fixedly connected to the first leg part 61, which is used to support the tracked chassis.

[0118] The second leg 7 and the first leg 6 have basically the same structure, so they will not be described in detail here.

[0119] After adopting the first outrigger 6 in this embodiment, the corresponding three operating states of the tracked chassis change as follows.

[0120] 1. First working state of the tracked chassis:

[0121] like Figure 12 As shown, at this time, the first track frame 2, the second track frame 3, the two first outriggers 6 and the two second outriggers 7 are all in a retracted state relative to the chassis 1. The first swing part 622 in the first outrigger 6 and the second swing part in the second outrigger 7 are also swinging to the position closest to the first track frame 2 and the second track frame 3. In this state, the size of the entire track chassis is the smallest. The whole machine is supported by the first track frame 2 and the second track frame 3. When walking, it can pass through narrower spaces and has the ability to walk and work in narrow spaces.

[0122] 2. Second working state of the tracked chassis:

[0123] like Figure 13As shown, at this time, the first track frame 2 and the second track frame 3 are both extended relative to the chassis 1. Although the two first legs 6 and the two second legs 7 are not extended relative to the first track frame 2 and the second track frame 3 respectively, as the first track frame 2 and the second track frame 3 extend a part relative to the chassis 1, the first swing part 622 in the first leg 6 and the second swing part in the second leg 7 swing to the position closest to the first track frame 2 and the second track frame 3. The first legs 6 and the second legs 7 do not support the ground. In this state, the size of the entire track chassis is wider than that of the first working state, and the overall working stability of the machine is better. When the track chassis is in the second working state, the whole machine is supported by the first track frame 2 and the second track frame 3, and also has the ability to move and work at the same time.

[0124] 3. The third working state of the tracked chassis:

[0125] like Figure 14 As shown, at this time, the first track frame 2, the second track frame 3, the two first outriggers 6 and the two second outriggers 7 are all in the extended state relative to the chassis 1. In this state, the size of the entire track chassis is at its maximum. When the machine is in operation, it is supported by the first support seat 612 in the two first outriggers 6 and the second support seat in the two second outriggers 7. The machine does not have the ability to work while walking, but it can achieve greater operational stability, stronger operational capability and a larger operating range.

[0126] Since the first swinging part 622 in the first leg 6 can change at least three positions relative to the first telescopic body 621, and the second swinging part in the second leg 7 can change positions relative to the second telescopic body, the aforementioned third operating state can achieve more operating states by adjusting the positions of the first swinging part 622 relative to the first telescopic body 621 and the second swinging part relative to the second telescopic body, such as... Figure 15 and Figure 16 As shown, the angles of the first swinging part 622 relative to the first telescopic body 621 and the angles of the second swinging part relative to the second telescopic body are respectively relative to... Figure 14 The angle gradually decreases, thereby further improving the overall operational stability of the machine.

[0127] The tracked chassis embodiment provided by this invention can effectively solve the problems of large size and poor operational flexibility of tracked chassis. The tracked chassis provided by this invention adopts a variable-gauge tracked chassis and a telescopic outrigger design. When the machine is in walking mode, the outriggers and track frame are retracted, and the telescopic outriggers are concealed within the support beams. The overall tracked chassis is small in size, allowing it to pass through narrower spaces and providing good flexibility. When the machine is in operation mode, the track frame or the telescopic outriggers can be deployed according to the working height, achieving greater operational stability for the entire machine.

[0128] Furthermore, the support beams in the chassis are nested inside the connecting parts of the track frame, and the telescopic parts of the telescopic outriggers are nested inside the support beams in the chassis, forming a two-level nested structure. This makes the tracked chassis more flexible in operation and significantly improves its adaptability to different working environments. Both the first and second outriggers can adopt telescopic and swingable outrigger structures, further expanding the working range of the tracked chassis and improving its operational capabilities and stability.

[0129] When the tracked chassis is in its first working state, the telescopic outriggers and left and right track frames are retracted. The telescopic outriggers are concealed within the connecting parts and support beams. The overall size of the tracked chassis is small, allowing it to pass through narrower spaces and providing good flexibility. Depending on the operational needs, the tracked chassis can also be selected to enter the second working state. In this state, the first and second track frames are fully extended relative to the chassis. The first and second outriggers extend partially relative to the chassis along with the first and second track frames, but they do not support the ground. The entire machine is supported by the first and second track frames, resulting in a larger track gauge and better operational stability. It also has the ability to operate while moving. When the tracked chassis is in the third working state, the telescopic outriggers and left and right track frames are fully deployed, achieving maximum operational stability and capability for the entire machine.

[0130] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can still be made to some technical features without departing from the principle of the present invention, and such modifications and equivalent substitutions should all be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A tracked chassis, characterized in that, include: Frame (1); First track frame (2); Second track frame (3); A first drive unit (4) is disposed between the vehicle frame (1) and the first track frame (2) and is configured to drive the first track frame (2) to extend and retract relative to the vehicle frame (1) in a first direction; The second drive unit (5) is disposed between the frame (1) and the second track frame (3) and is configured to drive the second track frame (3) to extend and retract relative to the frame (1) in the first direction to adjust the distance between the first track frame (2) and the second track frame (3) in the first direction. First leg (6); Second leg (7); A third drive unit (8) is disposed between the frame (1) and the first outrigger (6) and is configured to drive the first outrigger (6) to extend and retract relative to the frame (1) in the first direction, so as to support the tracked chassis by means of the first outrigger (6) when the first outrigger (6) is extended. and A fourth drive unit (9) is disposed between the frame (1) and the second leg (7) and is configured to drive the second leg (7) to extend and retract relative to the frame (1) in the first direction, so as to support the tracked chassis by means of the second leg (7) when the second leg (7) is extended; The frame (1) includes a frame body (11) and a first support beam (12) and a second support beam (13) respectively disposed on both sides of the frame body (11). The first support beam (12) includes a third hollow part, and the second support beam (13) includes a fourth hollow part. The first outrigger (6) includes a first outrigger part (61) and a first telescopic part (62) connected to the first outrigger part (61). The first outrigger part (61) is disposed on the side of the first track frame (2) away from the second track frame (3). The first telescopic part (62) passes through the first track frame (2) and is inserted into the third hollow part. The second outrigger (7) includes a second outrigger part and a second telescopic part connected to the second outrigger part. The second outrigger part is disposed on the side of the second track frame (3) away from the first track frame (2). The second telescopic part passes through the second track frame (3) and is inserted into the fourth hollow part. The first track frame (2) includes a first track frame body (21) and a first connecting part (22) disposed on the first track frame body (21) near the second track frame (3). The second track frame (3) includes a second track frame body and a second connecting part disposed on the second track frame body near the first track frame (2). The first connecting part (22) includes a first hollow part, and the second connecting part includes a second hollow part. The first support beam (12) is inserted into the first hollow part, and the second support beam (13) is inserted into the second hollow part. The first telescopic part (62) passes through the first hollow part and is inserted into the third hollow part, and the second telescopic part passes through the second hollow part and is inserted into the fourth hollow part.

2. The tracked chassis according to claim 1, characterized in that, The first drive device (4) is connected between the frame body (11) and the first track frame body (21), and the second drive device (5) is connected between the frame body (11) and the second track frame body.

3. The tracked chassis according to claim 2, characterized in that, The chassis body (11) is provided with a first mounting seat (17), the first track frame body (21) is provided with a second mounting seat (25), the second track frame body is provided with a third mounting seat, the first drive device (4) is mounted on the first mounting seat (17) and the second mounting seat (25), and the second drive device (5) is mounted on the first mounting seat (17) and the third mounting seat.

4. The tracked chassis according to claim 1, characterized in that, The inner surface of the first hollow part is provided with a first wear-resistant plate (23) and / or the outer surface of the first support beam (12) is provided with a second wear-resistant plate (14); and / or, the inner surface of the second hollow part is provided with a third wear-resistant plate and / or the outer surface of the second support beam (13) is provided with a fourth wear-resistant plate (15).

5. The tracked chassis according to claim 1, characterized in that, The third drive device (8) is connected between the first support beam (12) and the first telescopic part (62) and is located inside the third hollow part, the first track frame (2) and the first telescopic part (62). The fourth drive device (9) is connected between the second support beam (13) and the second telescopic part and is located inside the fourth hollow part, the second track frame (3) and the second telescopic part.

6. The tracked chassis according to claim 5, characterized in that, The first support beam (12) has a fourth mounting seat (18) inside, the second support beam (13) has a fifth mounting seat inside, the first telescopic part (62) has a sixth mounting seat (63) inside, the second telescopic part has a seventh mounting seat inside, the third drive device (8) is mounted on the fourth mounting seat (18) and the sixth mounting seat (63), and the fourth drive device (9) is mounted on the fifth mounting seat and the seventh mounting seat.

7. The tracked chassis according to claim 1, characterized in that, The outer surface of the first telescopic part (62) is provided with a fifth wear-resistant plate and / or the inner surface of the third hollow part is provided with a sixth wear-resistant plate (16); and / or, the outer surface of the second telescopic part is provided with a seventh wear-resistant plate and / or the inner surface of the fourth hollow part is provided with an eighth wear-resistant plate.

8. The tracked chassis according to claim 1, characterized in that, The first outrigger (61) includes a fifth drive device (611) and a first support base (612). The fifth drive device (611) is connected between the first telescopic part (62) and the first support base (612). The fifth drive device (611) is configured to drive the first support base (612) to move vertically relative to the first telescopic part (62) to adjust the ground clearance of the first support base (612). And / or, the second outrigger includes a sixth drive device and a second support base. The sixth drive device is connected between the second telescopic part and the second support base. The sixth drive device is configured to drive the second support base to move vertically relative to the second telescopic part to adjust the ground clearance of the second support base.

9. The tracked chassis according to claim 1, characterized in that, The first telescopic part (62) includes a first telescopic body (621) and a first swing part (622). The first telescopic body (621) passes through the first track frame (2) and is inserted into the third hollow part. One end of the first swing part (622) is connected to the first support leg (61), and the other end of the first swing part (622) is rotatably connected to the first telescopic body (621) so that the included angle between the first telescopic body (621) and the first swing part (622) is adjustable. And / or, the second telescopic part includes a second telescopic body and a second swing part. The second telescopic body passes through the second track frame (3) and is inserted into the fourth hollow part. One end of the second swing part is connected to the second support leg, and the other end of the second swing part is rotatably connected to the second telescopic body so that the included angle between the second telescopic body and the second swing part is adjustable.

10. The tracked chassis according to claim 9, characterized in that, The first telescopic portion (62) further includes a first limiting device configured to maintain the relative fixation of the first telescopic body (621) and the first swing portion (622) after adjusting the included angle between the first telescopic body (621) and the first swing portion (622); and / or, the second telescopic portion further includes a second limiting device configured to maintain the relative fixation of the second telescopic body and the second swing portion after adjusting the included angle between the second telescopic body and the second swing portion.

11. An engineering vehicle, characterized in that, Includes the tracked chassis as described in any one of claims 1 to 10.

Images