Crawler chassis with float function

Abstract

The invention provides a caterpillar chassis with floating function, belonging to the technical field of land transportation device of drilling machine, which comprises caterpillar beam plates arranged on left and right sides, a front cross beam and a rear cross beam arranged between the two caterpillar beam plates, and a support box arranged between the front cross beam and the rear cross beam; a box cavity is arranged in the support box, a cylindrical seat pier is arranged in the box cavity, a plurality of buffers are uniformly distributed on the surface of the seat pier along the circumferential direction, a circular seat disc is supported on the buffer, a floating seat ring is arranged outside the seat disc, a support seat for mounting an upper frame is arranged on the floating seat ring, an annular groove is arranged on the outer periphery of the seat pier close to the surface, an annular rotating ring is rotatably connected in the annular groove, a rotating motor for driving the rotating ring to rotate around the axis of the seat pier is arranged in the box cavity, an electric push rod is rotatably connected to the rotating ring, the direction of the rotating shaft is parallel to the direction of the tangent of the rotating ring, the extension and retraction of the electric push rod is driven by an extension and retraction motor, and a tapered variable diameter section is arranged at the end of the electric push rod.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of land transport devices of drilling machines, and particularly relates to a crawler chassis with floating function. BACKGROUND

[0002] The crawler chassis is a land transport device installed at the bottom of an engineering machine such as an excavator, a drilling machine, a drilling rig, etc. In order to improve the working range of the engineering machine, the crawler chassis can be provided with floating function. For example, a patent document with application number 2015210751806 discloses a crawler chassis with floating function, which adjusts the position of an upper frame through an oil cylinder, thereby improving the working range. However, the adjustment of the upper frame of the crawler chassis with floating function is limited to the extension direction of the oil cylinder, and thus the improvement of the working range is also limited. SUMMARY

[0003] The present application solves the above technical problems and provides a crawler chassis with floating function.

[0004] The technical scheme of the present application is a track chassis with floating function, which comprises track beams arranged on the left and right sides, a front cross beam and a rear cross beam arranged between the track beams, a support box arranged between the front cross beam and the rear cross beam, the surfaces of the front cross beam, the rear cross beam and the support box jointly forming a walking platform; a box cavity is arranged in the support box, a cylindrical seat pier is arranged in the box cavity, the surface of the seat pier is provided with a plurality of buffers uniformly distributed along the circumferential direction, a circular seat disc is supported on the buffer, a floating raceway is arranged outside the seat disc, a support seat for mounting an upper frame is arranged on the floating raceway, a ring groove is arranged on the outer periphery of the seat pier close to the surface, a ring rotating ring is rotatably connected in the ring groove, a rotary motor for driving the rotating ring to rotate around the axis of the seat pier is arranged in the box cavity, an electric push rod is rotatably connected to the rotating ring, the direction of the rotating shaft is parallel to the tangent direction of the rotating ring, the extension and retraction of the electric push rod is driven by a telescopic motor, a tapered variable diameter section is arranged at the end of the electric push rod, a row wheel assembly supported on the walking platform is arranged outside the variable diameter section, the end of the floating raceway extends downward and abuts against the rod portion of the electric push rod, a fixed raceway concentric with the floating raceway is arranged on the walking platform, the radius of the fixed raceway is smaller than the radius of the floating raceway so that the ends of the two are circumferentially staggered, the end of the fixed raceway abuts against the rod portion of the electric push rod, and the length of the variable diameter section is greater than the horizontal distance from the end of the floating raceway to the end of the fixed raceway.

[0005] As an embodiment, the end of the floating raceway is provided with an upper guide edge, the end of the fixed raceway is provided with a lower guide edge, and when the rod portion of the electric push rod abuts against the end of the floating raceway and the end of the fixed raceway, the electric push rod is in a horizontal state.

[0006] As an embodiment, the outer side edge of the variable diameter section is provided with an annular limiting edge.

[0007] As an embodiment, a motor groove is arranged in the box cavity, the rotary motor is arranged in the motor groove, a drive wheel is arranged on the output shaft of the rotary motor, and the drive wheel and the rotating ring are in transmission connection.

[0008] As an embodiment, a lower mounting groove is arranged on the surface of the seat pier, an upper mounting groove is arranged on the bottom of the seat disc, and the buffer is arranged between the lower mounting groove and the upper mounting groove.

[0009] As an implementation form, the buffer is a hydraulic buffer, the buffer comprises a cylinder base, a cylinder sleeve, a piston rod, a striking head and a spring, the cylinder sleeve is arranged on the cylinder base, the piston rod is movably connected to the cylinder sleeve, the striking head is arranged at the end of the piston rod, and the spring is abutted between the striking head and the cylinder sleeve, the cylinder base is arranged in the lower mounting groove, and the striking head is arranged in the upper mounting groove.

[0010] As an implementation form, the outer periphery of the seat disc is provided with a T-shaped connecting edge, the connecting edge connects the floating race, and the bottom of the fixed race is provided with a trapezoidal bottom support, and the bottom support connects the walking platform.

[0011] As an implementation form, the tread of the walking wheel is wrapped with an arc-shaped elastic layer.

[0012] As an implementation form, the fixed sleeve is fixed to the outer side of the variable-diameter section through a plurality of fixing devices.

[0013] As an implementation form, the bottom of the track beam plate is provided with a carrier wheel, the top of the track beam plate is provided with a chain supporting wheel, the front end of the track beam plate is provided with a guide wheel assembly, the rear end of the track beam plate is provided with a driving wheel assembly, and the chain supporting wheel, the guide wheel assembly, the driving wheel assembly and the carrier wheel are surrounded by a track chain ring.

[0014] Compared with the prior art, the track chassis with the floating function realizes the adjustment of the upper frame in the proximity to 360-degree full-dimensional adjustment. Only in the position near the rotating motor, the electric push rod cannot pass through the rotating ring, and in all other positions, the electric push rod can pass through the rotating ring. The rotating ring is driven by the rotating motor to rotate around the axis of the seat column, and is supported on the surface of the walking platform in the rotating process. When it is necessary to adjust the upper frame in a certain dimension, the electric push rod is first controlled by the rotating motor to rotate to the dimension. Then, the electric push rod is driven by the telescopic motor to bring the conical variable-diameter section into the floating race, so that the end of the floating race no longer abuts against the rod portion of the electric push rod, but abuts against the inclined surface of the variable-diameter section. Thus, one side of the floating race is lifted, i.e. the side where the electric push rod is located, so as to realize the adjustment of the upper frame installed on the support seat in the dimension. The upper frame is inclined to a certain extent, so that the area originally not in the working range falls within the working range due to the inclination of the upper frame.

[0015] Meanwhile, the adjustment is divided into two stages. In the first stage, the displacement amount of the tapering variable diameter section into the floating race is small. In this stage, the end of the floating race is in contact with the slope of the variable diameter section, while the end of the fixed race is still in contact with the rod of the electric push rod. Correspondingly, the adjustment range of the upper frame is small. In the second stage, the displacement amount of the tapering variable diameter section into the floating race is large. In this stage, the end of the floating race is in contact with the slope of the variable diameter section, while the end of the fixed race is also in contact with the slope of the variable diameter section. Then the electric push rod is no longer in the original horizontal state, but is rotated around the rotation shaft, and the end of the variable diameter section is lifted upward. When the output of the telescopic motor reaches the stroke, the adjustment motor reacts, rotates the driving rod to make the telescopic support rod extend, so that the walking wheel is still supported on the surface of the walking platform. Correspondingly, the adjustment range of the upper frame is increased. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A structure schematic diagram of a track chassis with floating function provided for an embodiment of the present application;

[0017] Figure 2 A first partial sectional view of a support position of a track chassis with floating function provided for an embodiment of the present application;

[0018] Figure 3 A second partial sectional view of a support position of a track chassis with floating function provided for an embodiment of the present application;

[0019] Figure 4 A partial enlarged view in Figure 2 ;

[0020] Figure 5 A structure schematic diagram of a walking wheel assembly provided for an embodiment of the present application;

[0021] Figure 6 A structure schematic diagram of a buffer provided for an embodiment of the present application.

[0022] In the figure: 1, track beam plate; 2, front cross beam; 3, rear cross beam; 4, support box; 5, walking platform; 6, box cavity; 7, seat pier; 8, buffer; 9, seat disc; 10, floating seat ring; 11, support seat; 12, ring groove; 13, rotating ring; 14, rotating motor; 15, electric push rod; 16, rotating shaft; 17, telescopic motor; 18, variable diameter section; 19, walking wheel assembly; 20, fixed seat ring; 21, fixed sleeve; 22, telescopic support rod; 23, walking wheel; 24, adjusting motor; 25, driving rod; 26, upper guide edge; 27, lower guide edge; 28, limiting edge; 29, motor groove; 30, driving wheel; 31, lower mounting groove; 32, upper mounting groove; 33, cylinder seat; 34, cylinder sleeve; 35, piston rod; 36, impact head; 37, spring; 38, connecting edge; 39, bottom support; 40, elastic layer; 41, fixing device; 42, supporting wheel; 43, chain sprocket; 44, guide wheel assembly; 45, driving wheel assembly; 46, track link. DETAILED DESCRIPTION

[0023] The above and other embodiments and advantages of the present application will become more apparent from the following detailed description taken in conjunction with the accompanying drawings.

[0024] In an embodiment, as Figures 1 to 5 shown.

[0025] The track chassis with floating function comprises track beam plates 1 arranged on left and right sides, a front cross beam 2 and a rear cross beam 3 arranged between the two track beam plates 1, a support box 4 arranged between the front cross beam 2 and the rear cross beam 3, and a walking platform 5 formed by surfaces of the front cross beam 2, the rear cross beam 3 and the support box 4; a box cavity 6 is arranged in the support box 4, a cylindrical seat pier 7 is arranged in the box cavity 6, a plurality of buffers 8 are uniformly distributed along the circumferential direction on the surface of the seat pier 7, a circular seat disc 9 is supported on the buffer 8, a floating seat ring 10 is arranged outside the seat disc 9, a support seat 11 for mounting an upper frame is arranged on the floating seat ring 10, a ring groove 12 is arranged on the outer periphery of the seat pier 7 close to the surface, a ring rotating ring 13 is rotatably connected in the ring groove 12, a rotating motor 14 is arranged in the box cavity 6 to drive the rotating ring 13 to rotate around the axis of the seat pier 7, an electric push rod 15 is rotatably connected on the rotating ring 13, the direction of the rotating shaft 16 is parallel to the direction of the tangent of the rotating ring 13, the extension and retraction of the electric push rod 15 is driven by a telescopic motor 17, a tapered reducing section 18 is arranged at the end of the electric push rod 15, a walking wheel assembly 19 supported on the walking platform 5 is arranged on the outside of the reducing section 18, the end of the floating seat ring 10 extends downward and abuts against the rod of the electric push rod 15, a fixed seat ring 20 concentric with the floating seat ring 10 is arranged on the walking platform 5, the radius of the fixed seat ring 20 is smaller than the radius of the floating seat ring 10 so that the ends of the two are circumferentially staggered, the end of the fixed seat ring 20 abuts against the rod of the electric push rod 15, and the length of the reducing section 18 is greater than the horizontal distance from the end of the floating seat ring 10 to the end of the fixed seat ring 20; the walking wheel assembly 19 comprises a fixed sleeve 21 fixed on the outside of the reducing section 18, a telescopic support rod 22 is arranged in the fixed sleeve 21, a walking wheel 23 is arranged at the bottom of the telescopic support rod 22, an adjusting motor 24 is arranged at the upper end of the fixed sleeve 21, a driving rod 25 connected with the output shaft of the adjusting motor 24 is arranged, the driving rod 25 is used to drive the telescopic support rod 22 to extend and retract relative to the fixed sleeve 21, and the output of the adjusting motor 24 is given according to the output of the telescopic motor 17.

[0026] In the present embodiment, the floating track chassis realizes the adjustment of the upper frame in nearly 360 degrees all directions through the above-mentioned improvement. Only in the position near the rotating motor 14, the electric push rod 15 cannot pass through the rotating ring 13, and in all other positions, the electric push rod 15 can pass through the rotating ring 13. The rotating ring 13 is driven by the rotating motor 14 to rotate around the axis of the seat 7, and in the rotating process, it is supported by the walking wheel assembly 19 on the surface of the walking platform 5. The seat 9 and the floating seat ring 10 are supported by the buffers 8, and although the rod of the electric push rod 15 abuts against the end of the floating seat ring 10 and the end of the fixed seat ring 20, the floating seat ring 10 is not pressed on the rod of the electric push rod 15 due to the support of the buffers 8. Therefore, the fixed seat ring 20 and the floating seat ring 10 are circumferentially staggered and do not affect the rotation of the electric push rod 15 with the rotating ring 13. When the adjustment of the upper frame in a certain dimension is needed, the electric push rod 15 is first controlled by the rotating motor 14 to rotate to this dimension. Then the electric push rod 15 is driven by the telescopic motor 17 to partially bring the tapered reducing section 18 into the floating seat ring 10, so that the end of the floating seat ring 10 no longer abuts against the rod of the electric push rod 15, but abuts against the inclined surface of the reducing section 18. Thus, one side of the floating seat ring 10 is lifted, i.e. the side where the electric push rod 15 is located, and the adjustment of the upper frame mounted on the support seat 11 in this dimension is realized. Because in the process of lifting one side of the floating seat ring 10, the end of the floating seat ring 10 and the end of the fixed seat ring 20 are separated in the horizontal direction on the side where the telescopic motor 17 is located. On the other side, the end of the floating seat ring 10 and the end of the fixed seat ring 20 are close to or even staggered in the horizontal direction. Similarly, the buffers 8 located on the side where the telescopic motor 17 is located are lengthened due to release, and the buffers 8 located on the other side are shortened due to pressure. The result on the upper frame is that the upper frame tilts to a certain extent, so that the area originally not in the working range falls within the working range due to the tilt of the upper frame.

[0027] In the embodiment, the adjustment is divided into two stages. In the first stage, the displacement of the tapering section 18 into the floating race 10 is small. In this stage, the end of the floating race 10 abuts against the tapering surface of the tapering section 18, while the end of the fixed race 20 still abuts against the rod of the electric push rod 15. Correspondingly, the adjustment range of the upper frame is small. In the second stage, the displacement of the tapering section 18 into the floating race 10 is large. In this stage, the end of the floating race 10 abuts against the tapering surface of the tapering section 18, while the end of the fixed race 20 also abuts against the tapering surface of the tapering section 18. Then the electric push rod 15 is no longer in the horizontal state as before, but is rotated about the rotation shaft 16, and the end of the tapering section 18 is lifted upward. When the output of the telescopic motor 17 reaches the stroke, the adjusting motor 24 reacts by rotating the driving rod 25 to extend the telescopic support rod 22, so that the track wheels 23 are still supported on the surface of the walking platform 5. Correspondingly, the adjustment range of the upper frame is increased.

[0028] In the embodiment, the adjustment range can be further increased by increasing the taper of the tapering section 18.

[0029] In an embodiment, as shown in Figure 4 .

[0030] The floating track chassis provided in the embodiment is provided with an upper guide edge 26 at the end of the floating race 10 and a lower guide edge 27 at the end of the fixed race 20. When the rod of the electric push rod 15 abuts against the end of the floating race 10 and the end of the fixed race 20, the electric push rod 15 is in the horizontal state.

[0031] In the embodiment, the upper guide edge 26 is provided at the end of the floating race 10, and the lower guide edge 27 is provided at the end of the fixed race 20. When the tapering section 18 enters the floating race 10, the resistance can be reduced by the upper guide edge 26 and the lower guide edge 27. When the rod of the electric push rod 15 abuts against the end of the floating race 10 and the end of the fixed race 20, the end of the floating race 10 is not pressed on the rod of the electric push rod 15 due to the support of the buffers 8. Correspondingly, the electric push rod 15 is in the horizontal state.

[0032] In an embodiment, as shown in Figure 5 .

[0033] The floating track chassis provided in the embodiment is provided with an annular limiting edge 28 at the outer edge of the tapering section 18.

[0034] In the embodiment, the annular limiting edge 28 is provided at the outer edge of the tapering section 18. When the tapering section 18 enters the floating race 10, it will not enter any more after a certain stroke due to the limitation of the limiting edge 28.

[0035] In one embodiment, as shown in Figure 2 and Figure 3 .

[0036] The track chassis with floating function provided by the embodiment has a motor groove 29 in the box cavity 6, and a rotating motor 14 is located in the motor groove 29. A driving wheel 30 is arranged on the output shaft of the rotating motor 14, and the driving wheel 30 is in transmission connection with the rotating ring 13.

[0037] In the embodiment, the motor groove 29 is arranged in the box cavity 6, and the rotating motor 14 is installed in the motor groove 29. By arranging the driving wheel 30 on the output shaft of the rotating motor 14, the rotating ring 13 can be driven to rotate.

[0038] In one embodiment, as shown in Figure 6 .

[0039] The track chassis with floating function provided by the embodiment has a lower installation groove 31 arranged on the surface of the seat pier 7, and an upper installation groove 32 arranged on the bottom of the seat disc 9. The buffer 8 is arranged between the lower installation groove 31 and the upper installation groove 32.

[0040] In the embodiment, the lower installation groove 31 is arranged on the surface of the seat pier 7, and the upper installation groove 32 is arranged on the bottom of the seat disc 9. The installation position of the buffer 8 is provided, so that the position of the installed buffer 8 is more stable.

[0041] In one embodiment, as shown in Figure 6 .

[0042] The track chassis with floating function provided by the embodiment has a hydraulic buffer 8. The hydraulic buffer 8 includes a cylinder seat 33, a cylinder sleeve 34, a piston rod 35, a striking head 36, and a spring 37. The cylinder sleeve 34 is arranged on the cylinder seat 33. The piston rod 35 is movably connected with the cylinder sleeve 34. The striking head 36 is arranged at the end of the piston rod 35. The spring 37 is arranged between the striking head 36 and the cylinder sleeve 34. The cylinder seat 33 is arranged in the lower installation groove 31, and the striking head 36 is arranged in the upper installation groove 32.

[0043] In the embodiment, a specific structure of the hydraulic buffer is provided. The hydraulic buffer composed of the cylinder seat 33, the cylinder sleeve 34, the piston rod 35, the striking head 36, and the spring 37 provides stable support for the seat disc 9, the floating seat ring 10, the support seat 11, and the upper vehicle frame thereon.

[0044] In one embodiment, as shown in Figure 3 .

[0045] The track chassis with floating function provided by the embodiment has a T-shaped connecting edge 38 on the outer periphery of the seat disc 9, the connecting edge 38 connects the floating seat ring 10, the bottom of the fixed seat ring 20 is provided with a trapezoidal bottom support 39, and the bottom support 39 connects the walking platform 5.

[0046] In the embodiment, the T-shaped connecting edge 38 can strengthen the connection between the seat disc 9 and the floating seat ring 10. The trapezoidal bottom support 39 can strengthen the support of the fixed seat ring 20. Both of them can increase the strength.

[0047] In one embodiment, as shown in Figure 3 .

[0048] The track chassis with floating function provided by the embodiment has an arc-shaped elastic layer 40 wrapped on the wheel surface of the walking wheel 23.

[0049] In the embodiment, the arc-shaped elastic layer 40 wrapped on the wheel surface of the walking wheel 23 makes the contact between the walking wheel 23 and the walking platform 5 not limited to a plane. When the electric push rod 15 is no longer in the horizontal state as before in the second stage, the adjusting motor 24 makes the telescopic support rod 22 elongate to make the walking wheel 23 contact the surface of the walking platform 5, which realizes the front contact by the arc and realizes the stable contact by the elasticity.

[0050] In one embodiment, as shown in Figure 5 .

[0051] The track chassis with floating function provided by the embodiment has a fixed sleeve 21 fixed on the outside of the variable diameter section 18 through a plurality of fixing devices 41.

[0052] In the embodiment, the connection and fixation are realized through the plurality of fixing devices 41, which reduces the possibility of unstable single-point connection and fixation.

[0053] In one embodiment, as shown in Figure 1 .

[0054] The track chassis with floating function provided by the embodiment has a supporting wheel 42 at the bottom of the track beam plate 1, a chain supporting wheel 43 at the top of the track beam plate 1, a guide wheel assembly 44 at the front end of the track beam plate 1, a driving wheel assembly 45 at the rear end of the track beam plate 1, and a track chain ring 46 around the chain supporting wheel 43, the guide wheel assembly 44, the driving wheel assembly 45, and the supporting wheel 42.

[0055] In the embodiment, the specific structure of the track chassis with floating function related to the track chain ring 46 is provided. The driving wheel assembly 45 is located near one side of the rear cross beam 3, which belongs to a rear-drive power system.

[0056] The above detailed description of the specific implementation has further detailed the inventive purpose, technical scheme and beneficial effects of the present application. It should be understood that the above is only a specific implementation of the present application and is not used to limit the protection scope of the present application. It is particularly pointed out that any modification, equivalent replacement, improvement, etc. made by those skilled in the art within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A tracked chassis with floatation function, characterized in that, The invention discloses a track beam plate (1) is arranged on the left and right sides, the front cross beam (2) and the rear cross beam (3) are arranged between the two track beam plates (1), the support box (4) is arranged between the front cross beam (2) and the rear cross beam (3), the surface of the front cross beam (2), the rear cross beam (3) and the support box (4) jointly forms a walking platform (5); The support box (4) is provided with a box cavity (6), the box cavity (6) is provided with a cylindrical seat pier (7), the surface of the seat pier (7) is provided with a plurality of buffers (8) which are uniformly distributed along the circumferential direction, the buffer (8) is supported with a circular ring-shaped seat disc (9), the seat disc (9) is provided with a floating race (10) outside, the floating race (10) is provided with a support seat (11) for installing the upper frame, the outer periphery of the seat pier (7) close to the surface is provided with a ring groove (12), the ring groove (12) is rotatably connected with a ring-shaped rotating ring (13), the box cavity (6) is provided with a rotating motor (14) for driving the rotating ring (13) to rotate around the axis of the seat pier (7), the rotating ring (13) is rotatably connected with an electric push rod (15) through a rotating shaft (16), and the direction of the rotating shaft (16) is parallel to the tangent direction of the rotating ring (13), the extension and contraction of the electric push rod (15) is driven by a telescopic motor (17), the end of the electric push rod (15) is provided with a tapered variable diameter section (18), the outer side of the variable diameter section (18) is provided with a walking wheel assembly (19) supported on the walking platform (5), the end of the floating race (10) extends downward and abuts against the rod portion of the electric push rod (15), the walking platform (5) is provided with a fixed race (20) concentric with the floating race (10), the radius of the fixed race (20) is smaller than the radius of the floating race (10) so that the ends of the two are circumferentially staggered, the end of the fixed race (20) abuts against the rod portion of the electric push rod (15), and the length of the variable diameter section (18) is greater than the horizontal distance from the end of the floating race (10) to the end of the fixed race (20); The walking wheel assembly (19) comprises a fixed sleeve (21) fixed to the outer side of the variable diameter section (18), the fixed sleeve (21) is provided with a telescopic support rod (22) inside, the bottom of the telescopic support rod (22) is provided with a walking wheel (23), the upper end of the fixed sleeve (21) is provided with an adjusting motor (24), the output shaft of the adjusting motor (24) is connected with a driving rod (25), the driving rod (25) is used for driving the telescopic support rod (22) to extend and contract relative to the fixed sleeve (21), and the output amount of the adjusting motor (24) is given according to the output amount of the telescopic motor (17); Wherein, all positions except the position of the rotating motor (14) can make the electric push rod (15) pass with the rotating ring (13), the rotating ring (13) is driven by the rotating motor (14) to rotate around the axis of the seat pier (7), and in the rotating process, the walking wheel assembly (19) is supported on the surface of the walking platform (5).

2. The track chassis with floatation function according to claim 1, characterized in that, The end of the floating raceway (10) is provided with an upper guide edge (26), and the end of the fixed raceway (20) is provided with a lower guide edge (27), when the rod of the electric push rod (15) abuts against the end of the floating raceway (10) and the end of the fixed raceway (20), the electric push rod (15) is placed in a horizontal state.

3. The track chassis with floatation according to claim 1, wherein, The outer side edge of the variable-diameter section (18) is provided with an annular limiting edge (28).

4. The track chassis with floatation according to claim 1, wherein, The box cavity (6) is provided with a motor groove (29), and the rotating motor (14) is located in the motor groove (29), and the output shaft of the rotating motor (14) is provided with a driving wheel (30), and the driving wheel (30) and the rotating ring (13) are in transmission connection.

5. The track chassis with floatation according to claim 1, wherein, The surface of the seat pier (7) is provided with a lower mounting groove (31), the bottom of the seat disc (9) is provided with an upper mounting groove (32), and the buffer (8) is arranged between the lower mounting groove (31) and the upper mounting groove (32).

6. The track chassis with floatation according to claim 5, wherein, The buffer (8) is a hydraulic buffer, which comprises a cylinder seat (33), a cylinder sleeve (34), a piston rod (35), a striking head (36), and a spring (37), the cylinder sleeve (34) is arranged on the cylinder seat (33), the piston rod (35) is movably connected to the cylinder sleeve (34), the striking head (36) is arranged at the end of the piston rod (35), the spring (37) is abutted between the striking head (36) and the cylinder sleeve (34), and the cylinder seat (33) is arranged in the lower mounting groove (31), and the striking head (36) is arranged in the upper mounting groove (32).

7. The track chassis with floatation according to claim 1, wherein, The outer periphery of the seat disc (9) is provided with a T-shaped connecting edge (38), the connecting edge (38) connects the floating raceway (10), the bottom of the fixed raceway (20) is provided with a trapezoidal bottom support (39), and the bottom support (39) connects the walking platform (5).

8. The track chassis with floatation according to claim 1, wherein, The tread of the walking wheel (23) is wrapped with an arc-shaped elastic layer (40).

9. The track chassis with floatation according to claim 1, wherein, The fixed sleeve (21) is fixed to the outer side of the variable-diameter section (18) through a plurality of fixing devices (41).

10. The track chassis with floatation according to claim 1, wherein, The bottom of the track beam plate (1) is provided with a carrier wheel (42), the top of the track beam plate (1) is provided with a chain supporting wheel (43), the front end of the track beam plate (1) is provided with a guide wheel assembly (44), the rear end of the track beam plate (1) is provided with a driving wheel assembly (45), and the chain supporting wheel (43), the guide wheel assembly (44), the driving wheel assembly (45), and the carrier wheel (42) are surrounded by a track chain ring (46).

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