Steel track chassis

Abstract

The present invention relates to the technical field of crawler chassis devices, and specifically discloses a steel crawler chassis, comprising: a chassis bracket, longitudinal beams symmetrically arranged on both sides of the chassis bracket, crawlers wound around the two longitudinal beams, and the crawlers are composed of a plurality of hinged crawler plates; slide rails are arranged on the crawler plates along the length direction, each slide rail is provided with crawler teeth, and a plurality of support rods are elastically provided on the upper portion of the crawler plates; a plurality of limit assemblies are arranged on the crawler plates along the length direction, and pushing assemblies are provided on the two longitudinal beams; an adjustment assembly is arranged inside the chassis bracket, and the adjustment assembly is connected to the opposite side walls of the two longitudinal beams, and the adjustment assembly can adjust the distance between the two longitudinal beams; the steel crawler chassis of the present invention avoids the wear caused by direct friction of the traditional crawler with the ground and the risk of derailment during adjustment, thereby extending the service life of the crawler and protecting the ground structure at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of crawler chassis devices, in particular to a steel crawler chassis. Background Art

[0002] A steel track chassis is a crawler-type walking device made of steel, commonly found in heavy equipment or vehicles that require high load-bearing capacity, strong durability, and adaptability to complex terrain, enabling the track chassis to adapt to multiple working scenarios.

[0003] The Chinese patent with announcement number CN221519822U discloses a mountain crawler chassis, including a chassis frame and support columns fixedly installed on the top and bottom of the chassis frame, an extension column is slidably installed on the same side of the two support columns, and an adjustment component is provided inside the support column. A track assembly is fixedly installed on the same side of the two extension columns and the same side of the two support columns, the outer surface of the second threaded rod is adapted to the inner part of the adjustment groove, and the rotation of the second threaded rod will drive the extension column to extend, thereby extending the distance between the two track assemblies, and flexibly adjust according to different needs. The inner part of the adjustment groove is threadedly installed with the outer surface of the second threaded rod; according to the signal sent by the attitude sensor, the first motor is started to drive the rotation of the first threaded rod to adjust the position change of the counterweight block in the chassis frame, thereby changing the offset of the center of gravity of the entire chassis, adjusting the position of the load block, ensuring the stability of the center of gravity of the chassis, and preventing rollover.

[0004] The above patent document states that the rotation of the second threaded rod will drive the extension column, thereby extending the distance between the two track assemblies, and can be flexibly adjusted according to different needs. However, when adjusting the distance between the two tracks, it is easy to cause wear between the tracks and the ground, which not only reduces the track grip effect and service life, but also easily causes damage to the ground. At the same time, the adjustment of the above patent document is prone to the risk of the track falling off, thereby causing safety accidents. Summary of the Invention

[0005] The present invention provides a steel crawler chassis, aiming to solve the technical problem in the related art that the adjustment of the distance between the two crawlers easily causes wear between the crawlers and the ground, and easily causes the risk of the crawlers falling off.

[0006] The steel crawler chassis of the present invention comprises: a chassis bracket, longitudinal beams are symmetrically arranged on both sides of the chassis bracket, crawlers are wound around the two longitudinal beams, and the crawlers are composed of multiple hinged crawler plates;

[0007] At least two slide rails are arranged on the track shoe along the length direction, and multiple slide rails are spaced apart along the width direction. Each slide rail is provided with a track tooth, and the two can slide relative to each other. A plurality of support rods are elastically provided on the track shoe, and the support rods pass through the track shoe and are perpendicular to each other.

[0008] A plurality of limit assemblies are arranged on the track shoe along the length direction, and the limit assemblies are located between two adjacent slide rails. A pushing assembly is provided on each of the two longitudinal beams. The pushing assembly pushes downward and has a first pushing position and a second pushing position. When the pushing assembly is in the first pushing position, it can drive and cooperate with the limit assemblies to implement a limit release on the sliding cooperation between the slide rails and the track teeth, so that the slide rails and the track teeth can slide relative to each other when adjusting the distance between the two longitudinal beams. When the pushing assembly is in the second pushing position, the support rod is driven to move downward and contact and support the ground, so that the track teeth can slide back to their original position.

[0009] The adjusting component is arranged inside the chassis bracket and is connected to the side walls opposite to the two longitudinal beams. The adjusting component can adjust the distance between the two longitudinal beams.

[0010] Preferably, a first fixed block is provided on the opposite side walls of the slide rail, a second fixed block is provided on the top of the track tooth, and the bottom of the first fixed block and the top of the second fixed block are stopped at each other, and limiting grooves are provided on the bottom of the first fixed block and the side walls of the second fixed block, and the limiting grooves are dovetail-shaped.

[0011] Preferably, the pushing assembly includes: multiple telescopic rods and a pushing plate, the multiple telescopic rods are evenly spaced at the bottom of the longitudinal beam, the pushing plate is set at the output end of the telescopic rod, so that the telescopic rod can push the pushing plate to move up and down, two first pushing rods are spaced apart on the track shoe along the length direction, and the first pushing rods pass through the track shoe and the two are perpendicular to each other, the outer peripheral surface of the first pushing rod is provided with a second elastic member, and the outer peripheral surface of the first pushing rod is provided with a guide block.

[0012] Preferably, the limit assembly includes: a plurality of limit boxes, torsion springs, limit strips and limit blocks, the plurality of limit boxes are arranged on the outer wall of the track shoe away from the longitudinal beam, and the limit boxes are arranged at intervals along the length direction of the track shoe and are located between the two track teeth, a rotating cylinder is rotatably arranged inside each limit box, the inner ring surface of the rotating cylinder is symmetrically provided with spiral guide grooves, and the guide blocks are embedded in the spiral guide grooves to convert axial displacement into rotational motion, a gear ring is fixedly provided on the outer circumference of the rotating cylinder, a circular ring is fixedly provided on the outer circumference of the rotating cylinder, and the circular ring is located above the gear ring, the torsion spring is sleeved on the outer circumference of the rotating cylinder, and the top of the torsion spring is connected to the limit box, and the bottom of the torsion spring is connected to the top of the circular ring.

[0013] Preferably, the limit bars are symmetrically arranged inside the limit box, and one end of the two limit bars extends out of the two opposite side walls of the limit box respectively, and racks are provided on the opposite side walls of the two limit bars, and the racks on the two limit bars are engaged with the gear rings, so that the rotation of the rotating drum can drive the two limit bars to move in opposite directions, and the extended end faces of the two limit bars are respectively provided with limit blocks, and the limit blocks are dovetail-shaped, and the limit blocks cooperate with the limit grooves.

[0014] Preferably, the support rods are arranged at intervals along the length direction of the track shoe, and multiple support rods all pass through the track shoe and are perpendicular to each other. The support rods are composed of a third cylinder and a fourth cylinder fixedly connected, and the third cylinder close to the top extension plate is larger than the diameter of the fourth cylinder. A hole is opened on the track shoe, and the fourth cylinder passes through the hole. A third elastic member is provided at one end of the third cylinder close to the track shoe, and one end of the third elastic member is connected to the track shoe and is sleeved on the outer circumference of the fourth cylinder, so that the third elastic member elastically supports the support rod.

[0015] Preferably, the two end surfaces of the slide rail are provided with blocks, and a first cavity is formed between the track teeth and the slide rail, a support block is provided on the top of the track teeth, and the support block is located in the cavity formed between the track teeth and the slide rail, and divides the cavity into two second cavities of the same length, and tension springs are respectively provided inside the second cavities, and the two ends of the tension springs are respectively connected to the opposite side walls of the support block and the stop block, so that the track teeth can be reset by the tension springs after sliding with the slide rail.

[0016] Preferably, the adjustment component comprises: two cylinders are arranged inside the chassis bracket, and the output ends of the cylinders are respectively connected to two opposite side walls of the longitudinal beam.

[0017] Preferably, a driving member and a guide wheel are respectively installed at both ends of the longitudinal beam, a driving wheel is provided on the driving member, an electric motor or a hydraulic motor is provided inside the driving member to drive the track to rotate, a tensioning mechanism is provided inside the longitudinal beam for adjusting the tension of the track, and supporting wheels are provided at intervals along the length direction at the bottom of the longitudinal beam.

[0018] Preferably, rotating rings are arranged at intervals along the axial direction on the outer circumference of the driving member, and the rotating rings are symmetrically distributed on both sides of the driving wheel. A driving structure is arranged inside the driving member to drive the rotating rings to rotate. Arc-shaped protrusions are fixedly arranged on the outer circumference of the rotating rings, and the arc-shaped protrusions can be squeezed and matched with the support rod.

[0019] The beneficial effects of the present invention are:

[0020] 1. Zero friction in track spacing adjustment Through the relative sliding design between the slide rail and the track teeth, the track teeth are completely out of contact with the ground when adjusting the longitudinal beam spacing, avoiding the wear caused by direct friction between traditional tracks and the ground, extending the service life of the tracks and protecting the ground structure at the same time.

[0021] 2. Double support ensures adjustment stability. The synergistic effect of the elastic support rod and the push assembly can provide stable ground support through the support rod during adjustment, and automatically reset the track tooth position after the adjustment is completed, realizing a damage-free flexible adjustment process.

[0022] 3. Mechanical interlocking safety protection adopts a mechanical locking device with a dovetail groove limit structure. Through the wedge-shaped cooperation between the limit block, the slide rail and the track teeth, it effectively prevents the slide rail and the track teeth from accidentally dislocating during crawler operation, significantly improving the safety and reliability of the adjustment process.

[0023] 4. Modular adjustment is efficient and convenient. The integrated cylinder-driven adjustment component and the automatic limit release mechanism can achieve fast and accurate adjustment of the longitudinal beam spacing, and can complete adaptive adjustment of different working conditions without removing components.

[0024] 5. Dynamic self-reset function The innovative tension spring-support block reset mechanism can automatically rebound to the initial position after the track teeth slip. Combined with the torsion spring reset system of the limit assembly, it ensures the integrity of the track structure and movement consistency after adjustment.

[0025] 6. The enhanced drive wheel is equipped with an adjustable arc-shaped bump structure for multi-terrain adaptation. By changing the extension and retraction sequence of the support rod, the depth of engagement between the track and the ground is enhanced when climbing, thereby improving grip and making it suitable for engineering machinery applications in complex terrain. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0027] Figure 2 It is a schematic diagram of the track shoe structure of the present invention.

[0028] Figure 3 It is a schematic diagram of the structure of the track teeth of the present invention.

[0029] Figure 4 It is a schematic diagram of the first push rod structure of the present invention.

[0030] Figure 5 It is a schematic structural diagram of the limit box of the present invention.

[0031] Figure 6 It is a schematic diagram of the rotating drum structure of the present invention.

[0032] Figure 7 This invention Figure 5 Enlarged view of point B in the middle.

[0033] Figure 8 It is a schematic diagram of the spiral guide groove structure of the present invention.

[0034] Figure 9 It is a schematic diagram of the limit bar structure of the present invention.

[0035] Figure 10 It is a schematic diagram of the limit block structure of the present invention.

[0036] Figure 11 It is a schematic diagram of the block structure of the present invention.

[0037] Figure 12 This invention Figure 11 Enlarged view of point A in the middle.

[0038] Figure 13 It is a schematic diagram of the top extension plate structure of the present invention.

[0039] Figure 14 It is a schematic diagram of the driving component structure of the present invention.

[0040] Figure 15 It is a schematic diagram of the rotating ring structure of the present invention.

[0041] Figure 16 It is a schematic diagram of the arc-shaped protrusion structure of the present invention.

[0042] Reference numerals:

[0043] 10. Chassis bracket; 11. Longitudinal beam; 12. Driving wheel; 13. Guide wheel; 14. Support roller; 15. Driving member; 19. Hole; 20. Track; 21. Track shoe; 22. Chain link; 23. Slide rail; 24. Track tooth; 25. Support rod; 26. Third elastic member; 27. First push rod; 28. Second elastic member; 29. ​​Guide block; 30. Limit box; 31. Rotating cylinder; 32. Spiral guide groove; 33. Torsion spring; 34. Circular ring; 35. U-shaped guide groove; 36. Limit strip; 37. Guide plate; 39. First elastic member; 40. Limit block; 41. First fixed block; 42. Second fixed block; 50. Telescopic rod; 51. Extending plate; 60. Support block; 61. Tension spring; 62. Stopper; 70. Rotating ring; 71. Arc-shaped protrusion; 80. Cylinder. DETAILED DESCRIPTION

[0044] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0045] like Figures 1 to 16As shown, the steel crawler chassis of the present invention includes: a chassis bracket 10, longitudinal beams 11 are symmetrically arranged on both sides of the chassis bracket 10, and crawlers 20 are wound around the two longitudinal beams 11, and also includes: a plurality of track teeth 24, a plurality of slide rails 23 and a plurality of limit assemblies, a plurality of slide rails 23 are fixedly arranged at intervals along the outer peripheral surface of the crawler 20, a plurality of track teeth 24 are slidably fitted on the plurality of slide rails 23, and the two correspond one to one, a plurality of limit assemblies are arranged at intervals on the crawler 20, a pushing assembly is provided on the two longitudinal beams 11, and the pushing assembly and the limiting assembly are driven to cooperate to mechanically lock or release the sliding cooperation between the slide rails 23 and the track teeth 24, an adjustment assembly is arranged inside the chassis bracket 10, and the adjustment assembly is connected to the opposite side walls of the two longitudinal beams 11, and can adjust the distance between the two longitudinal beams 11.

[0046] When the track 20 is adjusted to its limit position, the track 20 and the track teeth 24 are adjusted to the limit position, so that the track 20 can move freely.

[0047] To further explain in detail how to adjust the distance between the crawler 20 and the ground to avoid friction between the crawler 20 and the ground, and to reduce the wear of the crawler 20, the following will explain in detail.

[0048] like Figures 1 to 10As shown, the crawler 20 is composed of multiple track shoes 21, and the multiple track shoes 21 are hinged in sequence. A chain link 22 is fixedly provided on the outer wall of each track shoe 21 close to the longitudinal beam 11. The chain link 22 is used to hinge the multiple track shoes 21 to each other in sequence, so that the crawler 20 as a whole is a round-end rectangle. The crawler 20 is sleeved on the longitudinal beam 11 and rotated. At least two slide rails 23 are arranged at intervals on the outer wall of a track shoe 21 away from the longitudinal beam 11, and the slide rails 23 are arranged along the length direction of the track shoe 21. In this embodiment, two slide rails are provided on one track shoe 21 23, and the slide rails 23 are provided with slide grooves along the length direction, and the slide groove openings face downward, the slide grooves on the slide rails 23 are slidably matched with track teeth 24, and the bottom surfaces of the track teeth 24 contact the ground to provide grip for the track 20 during walking, and first fixed blocks 41 are provided on the opposite side walls of the two slide rails 23, and second fixed blocks 42 are provided on the tops of the track teeth 24, and the bottom of the first fixed block 41 and the top of the second fixed block 42 are stopped, and limiting grooves are provided on the bottom of the first fixed block 41 and the side walls of the second fixed block 42, and the limiting grooves are dovetail-shaped.

[0049] like Figures 1 to 7 、 Figure 13 As shown, the pushing assembly includes: a plurality of telescopic rods 50 and a pushing plate 51, the plurality of telescopic rods 50 are evenly spaced at the bottom of the longitudinal beam 11, and the plurality of telescopic rods 50 are spaced at intervals along the length direction of the longitudinal beam 11, the pushing plate 51 is arranged at the output end of the telescopic rod 50, so that the telescopic rod 50 can push the pushing plate 51 to move up and down, and two first push rods 27 are spaced at intervals on the track shoe 21 along the length direction, and the first push rods 27 pass through the track shoe 21 and the two are perpendicular to each other, the first push rod 27 is composed of a first cylinder and a second cylinder fixedly connected, and the first cylinder close to the pushing plate 51 is larger than the diameter of the second cylinder, the second cylinder passes through the track shoe 21, and the first cylinder close to the track shoe 21 is provided with a second elastic member 28, and one end of the second elastic member 28 is connected to the track shoe 21 and is sleeved on the outer circumference of the second cylinder, so that the second elastic member 28 elastically supports the first push rod 27, and the outer circumference of the cylinder with a smaller diameter is symmetrically provided with a guide block 29.

[0050] like Figures 5 to 12As shown, the limit assembly includes: multiple limit boxes 30, torsion springs 33, limit bars 36 and limit blocks 40. Multiple limit boxes 30 are arranged on the outer wall of the track shoe 21 away from the longitudinal beam 11, and the limit boxes 30 are arranged at intervals along the length direction of the track shoe 21 and are located between the two track teeth 24 to facilitate the mechanical locking or release of the sliding cooperation between the slide rail 23 and the track teeth 24. A rotating cylinder 31 is rotatably provided inside each limit box 30, and the rotating cylinder 31 is located at the inner center position of the limit box 30. The inner annular surface of the rotating cylinder 31 is symmetrically provided with a spiral guide groove 32, and the guide block 29 is embedded in the spiral guide groove. 32 is used to convert axial displacement into rotational motion. A gear ring is fixedly provided on the outer circumference of the rotating cylinder 31, and the gear ring is close to the inner bottom wall of the limit box 30. A circular ring 34 is fixedly provided on the outer circumference of the rotating cylinder 31, and the circular ring 34 is located above the gear ring. A torsion spring 33 is sleeved on the outer circumference of the rotating cylinder 31, and the top of the torsion spring 33 is connected to the limit box 30, and the bottom of the torsion spring 33 is connected to the top of the circular ring 34, so that the torsion spring 33 applies a reverse torque to the rotating cylinder 31, stores elastic potential energy when the rotating cylinder 31 is rotated by external force, and drives the rotating cylinder 31 to automatically reset after the external force disappears, so as to keep the initial position stable.

[0051] The two limit bars 36 are symmetrically arranged inside the limit box 30, and one end of the two limit bars 36 extends out of the two opposite side walls of the limit box 30, and the side walls are parallel to the track teeth 24. Racks are provided on the opposite side walls of the two limit bars 36, and the racks on the two limit bars 36 are engaged with the gear rings so that the rotation of the rotating drum 31 can drive the two limit bars 36 to move in the opposite direction. The extended end surfaces of the two limit bars 36 are respectively provided with limit blocks 40, and the limit blocks 40 are dovetail-shaped. The limit block 40 cooperates with the limit groove so that the limit block 40 limits the slide rail 23 and the track tooth 24. The dovetail structure trapezoidal cross-section designed for the limit block 40 in this application forms a self-locking effect, and the design of the gradually expanding cross-section in the vertical direction can effectively resist the vibration impact of the track 20 during walking. When the slide rail 23 and the track tooth 24 are subjected to dynamic loads, the wedging effect of the dovetail inclined surface will generate a normal constraint force to prevent the components from axial movement, and the anti-escape ability is improved compared to the rectangular limit block 40.

[0052] When the distance between the two longitudinal beams 11 needs to be adjusted, the sliding cooperation limit of the slide rail 23 and the track teeth 24 needs to be released first, so that the multiple telescopic rods 50 push the extension plate 51 to move downward, and the extension plate 51 moves downward to push the first push rod 27 on the track shoe 21 in contact with the ground, so that the first push rod 27 moves downward. Since the guide block 29 on the first push rod 27 is embedded in the spiral guide groove 32, the first push rod 27 moves downward so that the guide block 29 cooperates with the spiral guide groove 32 to rotate the rotating cylinder 31, thereby converting the axial displacement into rotational motion, and rotating at the same time. The rotation of the drum 31 causes the two limit bars 36 meshing with the gear ring to move toward each other. The movement of the limit bars 36 drives the corresponding limit blocks 40 to move toward the limit box 30, so that the limit blocks 40 and the limit grooves are released to allow the sliding of the slide rails 23 and the track teeth 24 to cooperate with the limit. When the spacing between the two longitudinal beams 11 is adjusted, the slide rails 23 can move along the length direction of the track teeth 24, thereby avoiding the traditional adjustment that causes the track 20 to directly rub against the ground, shortening the service life of the track 20, and avoiding the derailment of the track 20 and the longitudinal beam 11 during adjustment, thereby improving the safety during adjustment.

[0053] When the adjustment is completed and the sliding cooperation between the slide rail 23 and the track teeth 24 needs to be limited, the pushing assembly is lifted upward, and the second elastic member 28 will push the first push rod 27 to move upward. The upward movement of the first push rod 27 drives the rotating cylinder 31 to move upward. At the same time, the torsion spring 33 will drive the rotating cylinder 31 to rotate and reset to ensure that the limiting assembly has sufficient driving force when resetting. The rotation of the rotating cylinder 31 will drive the two limiting bars 36 to move backwards, so that the limiting bar 36 drives the limiting block 40 to be inserted into the inside of the limiting groove to complete the limiting.

[0054] It should be noted that in order to ensure the stability of the movement of the limit bar 36, the interior of the limit box 30 is symmetrically provided with U-shaped guide grooves 35 along the width direction, and the U-shaped openings of the two U-shaped guide grooves 35 are symmetrically opened, and the outer wall of the limit bar 36 on the side away from the rotating cylinder 31 is provided with a guide plate 37, and the guide plate 37 slides and fits inside the U-shaped guide groove 35, so that the limit bar 36 can move stably when limiting or releasing the limit, thereby ensuring the entire limiting effect. At the same time, the limit bar 36 is provided with a first elastic member 39 at one end close to the rotating cylinder 31, and a fixed bar is provided inside the U-shaped guide groove 35, and the other end of the first elastic member 39 is connected to the fixed bar. The limit assembly has sufficient driving force when resetting to provide sufficient support for the limit block 40.

[0055] After the sliding cooperation limit of the slide rail 23 and the track teeth 24 is released, the adjustment assembly pushes the two longitudinal beams 11 to move in the opposite direction. The movement of the longitudinal beam 11 drives the crawler 20 and the slide rail 23 to slide on the track teeth 24. It should be noted that the sliding distance of the slide rail 23 on the track teeth 24 does not exceed half of the track teeth 24, so that the track teeth 24 can provide sufficient support for the crawler 20 to ensure the stability of the spacing adjustment of the entire longitudinal beam 11. When the crawler 20 and the slide rail 23 move to the extreme position of the track teeth 24, the track teeth 24 need to be separated from the ground for reset, so a support assembly is provided on the crawler 20.

[0056] like Figures 1 to 4 As shown, the support assembly includes: a support rod 25 and a third elastic member 26. The support rods 25 are arranged at intervals along the length direction of the track shoe 21, and multiple support rods 25 all pass through the track shoe 21 and are perpendicular to each other. The support rod 25 is composed of a third cylinder and a fourth cylinder fixedly connected, and the third cylinder close to the top extension plate 51 is larger than the diameter of the fourth cylinder. A hole 19 is opened on the track shoe 21, and the fourth cylinder passes through the hole 19. A third elastic member 26 is provided at one end of the third cylinder close to the track shoe 21, and one end of the third elastic member 26 is connected to the track shoe 21 and is sleeved on the outer circumference of the fourth cylinder, so that the third elastic member 26 elastically supports the support rod 25.

[0057] like Figures 11 to 12 As shown, the two end surfaces of the slide rail 23 are provided with stoppers 62, and a first cavity is formed between the track teeth 24 and the slide rail 23. Figure 11 As shown, a support block 60 is provided on the top of the track tooth 24, and the support block 60 is located in the cavity formed between the track tooth 24 and the slide rail 23, and divides the cavity into two second cavities of the same length. A tension spring 61 is provided inside the second cavity, and the two ends of the tension spring 61 are respectively connected to the opposite side walls of the support block 60 and the stop block 62, so that the track tooth 24 can be reset by the tension spring 61 after sliding with the slide rail 23.

[0058] When the track teeth 24 need to be disengaged from the ground and reset, the pushing assembly pushes the support rod 25 downward to contract the third elastic member 26 and make the support rod 25 on the track shoe 21 close to the ground stop against the ground. As the pushing assembly continues to squeeze the support rod 25 downward, the support rod 25 supports the longitudinal beam 11, thereby separating the track teeth 24 from the ground. After the track teeth 24 are separated from the ground, the two tension springs 61 will pull the track teeth 24 to reset, thereby avoiding friction damage between the track teeth 24 and the ground. The spacing adjustment method in the present application avoids the risk of the track 20 falling off, thereby ensuring safety during adjustment.

[0059] It should be noted that the end surface of the top extension plate 51 is concave, and the output end of the top extension plate 51 is connected to the concave inner bottom wall of the top extension plate 51. Figure 13 As shown, the telescopic rod 50 pushes the extending plate 51 so that the bottom surface can contact the top surface of the support rod 25 and the top surface of the first push rod 27 at the same time, so that the extending plate 51 moves downward to a first position and a second position. When the extending plate 51 moves downward to the first position, the limit assembly releases the limit, and the support rod 25 is still a distance from the ground at this time. When the extending plate 51 moves downward to the second position, the support rod 25 contacts the ground and supports the crawler 20.

[0060] The adjustment assembly includes: two cylinders 80 are arranged inside the chassis bracket 10, and the output ends of the cylinders 80 are respectively connected to the two opposite side walls of the longitudinal beam 11, so that the cylinders 80 can push the two longitudinal beams 11 closer to or away from each other, thereby adjusting the distance between the longitudinal beams 11 to optimize the contact method between the machine and the ground, and achieve safe, efficient and energy-saving operation.

[0061] In order to ensure that the crawler 20 has sufficient grip when climbing, to ensure the stability of the crawler 20 and to adapt to multiple working scenarios, the present application also provides a second embodiment.

[0062] like Figures 14 to 16 As shown, a driving member 15 and a guide wheel 13 are respectively installed at both ends of the longitudinal beam 11. The outer peripheral surface of the driving member 15 is provided with a driving wheel 12. The interior of the driving member 15 is provided with an electric motor or a hydraulic motor to drive the crawler 20 to rotate, thereby pushing the crawler chassis forward or backward. The guide wheel 13 is used to guide the crawler 20 to move in the correct direction to prevent the crawler 20 from derailing. A tensioning mechanism is provided inside the longitudinal beam 11 to adjust the tension of the crawler 20 to ensure that the crawler 20 maintains appropriate tightness during operation to prevent the crawler 20 from loosening or falling off. Support rollers 14 are provided at intervals along the length direction at the bottom of the longitudinal beam 11. The support rollers 14 are used to support the weight of the crawler chassis and reduce the friction resistance when the crawler 20 contacts the ground.

[0063] The outer circumference of the driving member 15 is provided with rotating rings 70 at intervals in the axial direction, and the rotating rings 70 are symmetrically distributed on both sides of the driving wheel 12. A driving structure is provided inside the driving member 15 to drive the rotating ring 70 to rotate. It should be noted that the driving structure is a prior art and therefore will not be described in detail. The outer circumference of the rotating ring 70 is fixedly provided with an arc-shaped protrusion 71, and the arc-shaped protrusion 71 can be squeezed and fitted with the support rod 25. The arc-shaped protrusion 71 has a first position and a second position. When the arc-shaped protrusion 71 is in the first position, the protruding part of the arc-shaped protrusion 71 faces the direction of the guide wheel 13. When the arc-shaped protrusion 71 is in the second position, the protruding part of the arc-shaped protrusion 71 faces away from the direction of the guide wheel 13. When climbing a slope is required, the driving structure can drive the rotating ring 70 to rotate, and the rotation of the rotating ring 70 drives the arc-shaped protrusion 71 to rotate, so that the arc-shaped protrusion 71 rotates from the first position to the second position. Figure 16As shown, when the crawler 20 is rotating and walking, when the support rod 25 on each track shoe 21 rotates to the position of the arc-shaped protrusion 71, the support rod 25 can be extended and retracted along the arc of the arc-shaped protrusion 71, thereby increasing the grip of the crawler 20 when climbing, thereby ensuring the stability of the crawler chassis and the stability of multi-scene operation.

[0064] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0065] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0066] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. Steel crawler chassis, characterized by: include: A chassis bracket (10), longitudinal beams (11) are symmetrically arranged on both sides of the chassis bracket (10), and crawlers (20) are wound around the two longitudinal beams (11), and the crawlers (20) are composed of a plurality of crawler shoes (21) hinged together; At least two slide rails (23) are provided on the track shoe (21) along the length direction, and the plurality of slide rails (23) are spaced apart along the width direction, each slide rail (23) is provided with a track tooth (24), and the two can slide relative to each other, and the track shoe (21) is elastically provided with a plurality of support rods (25), and the support rods (25) pass through the track shoe (21) and are perpendicular to each other; A plurality of limit assemblies are arranged on the track plate (21) along the length direction, and the limit assemblies are located between two adjacent slide rails. A pushing assembly is provided on each of the two longitudinal beams (11). The pushing assembly has a first pushing position and a second pushing position when pushing downward. When the pushing assembly is at the first pushing position, it can drive the limit assemblies to cooperate with each other, and implement limit release for the sliding cooperation between the slide rail (23) and the track teeth (24), so that the slide rail (23) and the track teeth (24) can slide relative to each other when adjusting the distance between the two longitudinal beams (11). When the pushing assembly is at the second pushing position, it drives the support rod (25) to move downward and contact and support the ground, so that the track teeth (24) slide and reset relative to the slide rail (23); An adjustment component is arranged inside the chassis bracket (10), and the adjustment component is connected to the opposite side walls of the two longitudinal beams (11). The adjustment component can adjust the distance between the two longitudinal beams (11).

2. The steel crawler chassis according to claim 1, characterized in that: A first fixed block (41) is provided on the opposite side walls of the slide rail (23), a second fixed block (42) is provided on the top of the track tooth (24), and the bottom of the first fixed block (41) and the top of the second fixed block (42) are stopped, and a limiting groove is provided on the bottom of the first fixed block (41) and the side wall of the second fixed block (42), and the limiting groove is in a dovetail shape.

3. The steel crawler chassis according to claim 2, characterized in that: The pushing assembly comprises: a plurality of telescopic rods (50) and a pushing plate (51), wherein the plurality of telescopic rods (50) are evenly spaced apart at the bottom of the longitudinal beam (11), and the pushing plate (51) is arranged at the output end of the telescopic rod (50) so that the telescopic rod (50) can push the pushing plate (51) to move up and down, and two first pushing rods (27) are spaced apart along the length direction on the track shoe (21), and the first pushing rods (27) pass through the track shoe (21) and are perpendicular to each other, and a second elastic member (28) is provided on the outer peripheral surface of the first pushing rod (27), and a guide block (29) is provided on the outer peripheral surface of the first pushing rod (27).

4. The steel crawler chassis according to claim 3, characterized in that: The limiting assembly comprises: a plurality of limiting boxes (30), a torsion spring (33), a limiting strip (36) and a limiting block (40), wherein the plurality of limiting boxes (30) are arranged on the outer wall of the track shoe (21) away from the longitudinal beam (11), and the limiting boxes (30) are arranged at intervals along the length direction of the track shoe (21) and are located between two track teeth (24), and a rotating cylinder (31) is rotatably arranged inside each limiting box (30), and the inner annular surface of the rotating cylinder (31) is symmetrically provided with a spiral guide groove (32), and the guide block (29) is embedded in the spiral guide groove (32) to convert the axial displacement into rotational motion, the outer circumference of the rotating cylinder (31) is fixedly provided with a gear ring, the outer circumference of the rotating cylinder (31) is fixedly provided with a circular ring (34), and the circular ring (34) is located above the gear ring, the torsion spring (33) is sleeved on the outer circumference of the rotating cylinder (31), and the top of the torsion spring (33) is connected to the limit box (30), and the bottom of the torsion spring (33) is connected to the top of the circular ring (34).

5. The steel crawler chassis according to claim 4, characterized in that: The limit bars (36) are symmetrically arranged inside the limit box (30), and one end of the two limit bars (36) extends out of the two opposite side walls of the limit box (30), and racks are provided on the opposite side walls of the two limit bars (36), and the racks on the two limit bars (36) are engaged with the gear ring, so that the rotation of the rotating cylinder (31) can drive the two limit bars (36) to move in the opposite direction, and the extended end surfaces of the two limit bars (36) are respectively provided with limit blocks (40), and the limit blocks (40) are dovetail-shaped, and the limit blocks (40) are matched with the limit grooves.

6. The steel crawler chassis according to claim 5, characterized in that: The support rods (25) are arranged at intervals along the length direction of the track shoe (21), and the plurality of support rods (25) all pass through the track shoe (21) and are perpendicular to each other. The support rods (25) are composed of a third cylinder and a fourth cylinder fixedly connected, and the third cylinder close to the top extension plate (51) is larger than the diameter of the fourth cylinder. A hole (19) is opened on the track shoe (21), and the fourth cylinder passes through the hole (19). A third elastic member (26) is provided at one end of the third cylinder close to the track shoe (21), and one end of the third elastic member (26) is connected to the track shoe (21) and is sleeved on the outer circumference of the fourth cylinder, so that the third elastic member (26) elastically supports the support rods (25).

7. The steel crawler chassis according to claim 6, characterized in that: The two end surfaces of the slide rail (23) are provided with stoppers (62), and a first cavity is formed between the track teeth (24) and the slide rail (23); a support block (60) is provided on the top of the track teeth (24), and the support block (60) is located in the cavity formed between the track teeth (24) and the slide rail (23), and divides the cavity into two second cavities of the same length; tension springs (61) are respectively provided inside the second cavities, and the two ends of the tension springs (61) are respectively connected to the side walls opposite to the support block (60) and the stopper (62), so that the track teeth (24) can be reset by the tension springs (61) after sliding with the slide rail (23).

8. The steel crawler chassis according to claim 7, characterized in that: The adjustment component comprises: two cylinders (80) are arranged inside the chassis bracket (10), and the output ends of the cylinders (80) are respectively connected to two opposite side walls of the longitudinal beam (11).

9. The steel crawler chassis according to claim 1, characterized in that: A driving member (15) and a guide wheel (13) are respectively installed at both ends of the longitudinal beam (11). A driving wheel (12) is provided on the driving member (15). An electric motor or a hydraulic motor is provided inside the driving member (15) to drive the crawler (20) to rotate. A tensioning mechanism is provided inside the longitudinal beam (11) for adjusting the tension of the crawler (20). Support rollers (14) are provided at intervals along the length direction at the bottom of the longitudinal beam (11).

10. The steel crawler chassis according to claim 9, characterized in that: The outer circumference of the driving member (15) is provided with rotating rings (70) at intervals along the axial direction, and the rotating rings (70) are symmetrically distributed on both sides of the driving wheel (12). A driving structure is provided inside the driving member (15) to drive the rotating rings (70) to rotate. The outer circumference of the rotating ring (70) is fixedly provided with an arc-shaped protrusion (71), and the arc-shaped protrusion (71) can be extruded and matched with the support rod (25).

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