Bottom frame supporting mechanism of wheel excavator

Abstract

The utility model belongs to the technical field of wheel excavator chassis supporting, and particularly relates to a wheel excavator chassis supporting mechanism which comprises a fixing plate, a moving groove is formed in the bottom of the fixing plate, a two-way threaded rod is rotationally installed in the moving groove, and first sliding blocks sliding in the moving groove are symmetrically installed on the two-way threaded rod in a threaded mode. Connecting rods are rotationally mounted at the lower ends of the two first sliding blocks, and the two connecting rods are arranged in a crossed mode and rotationally connected; the rectangular plate is arranged below the two connecting rods, a sliding groove is formed in the top of the rectangular plate, a round rod is fixedly installed in the sliding groove, second sliding blocks sliding in the sliding groove are symmetrically installed on the round rod in a sliding mode, and the upper ends of the two second sliding blocks are rotationally connected with the two connecting rods correspondingly; when the whole device is used, it is ensured that the whole device does not need to use a power source, the situation that short circuits occur in the places where water sources exist such as rivers are cleaned is avoided, and danger is prevented from occurring.

Description

Technical Field

[0001] The utility model belongs to the technical field of underframe support for wheeled excavators, in particular to an underframe support mechanism for wheeled excavators. Background Art

[0002] Wheeled excavators are easy to operate, flexible to move, and highly efficient, and can meet different operational requirements in different occasions.

[0003] For example, the Chinese patent with publication number CN219261183U discloses a wheeled excavator chassis support mechanism, including a fixed plate, a support leg, a foot, a first telescopic cylinder and a second telescopic cylinder. There are two fixed plates, which are respectively arranged at the front and rear ends of the excavator chassis, and the support legs are hinged on both sides of each fixed plate by hinges. The first telescopic cylinder is arranged inside the support leg, and the piston rod of the first telescopic cylinder passes through the bottom surface of the support leg and is connected to the foot. On the bottom surface of the fixed plate, a storage groove is arranged at a position close to the support leg, and the second telescopic cylinder is arranged inside the storage groove. The cylinder bottom of the second telescopic cylinder is hinged to one end of the storage groove by a hinge, and its piston rod can be hinged to the support leg through a connecting piece. The wheeled excavator chassis support mechanism described in the utility model has a reasonable design, a clever structure, a good support effect, convenient storage of the support legs, which is beneficial to the operation of the excavator and can effectively improve work efficiency.

[0004] The above patent has the following problems:

[0005] This patent has some disadvantages when used, such as: in some rural rivers, if they are not cleaned for a long time, they will be full of waterweeds, and there will be silt at the bottom of the river, resulting in poor water quality. An excavator is needed to clean the river. When the device is in use, the first telescopic cylinder and the second telescopic cylinder will short-circuit in places with water sources, which is easy to cause danger. In view of this, we propose a wheeled excavator chassis support mechanism. Utility Model Content

[0006] The purpose of the utility model is to provide a wheeled excavator underframe support mechanism to solve the problems raised in the above background technology.

[0007] In view of this, the utility model provides a wheeled excavator underframe support mechanism, comprising:

[0008] A fixed plate, a movable groove is provided at the bottom of the fixed plate, a bidirectional threaded rod is rotatably installed in the movable groove, and a slider 1 is symmetrically threadedly installed on the bidirectional threaded rod, and both sliders slide with the movable groove, and a connecting rod is rotatably installed at the lower ends of the two sliders, and the two connecting rods are cross-arranged, and the two connecting rods are rotatably connected;

[0009] A rectangular plate, the rectangular plate is arranged below the two connecting rods, a sliding groove is provided on the top of the rectangular plate, a round rod is fixedly installed in the sliding groove, and two sliders are symmetrically slidably installed on the round rod, both of which slide with the sliding groove, and the upper ends of the two sliders are rotatably connected with the two connecting rods respectively;

[0010] A groove, wherein the groove is provided at the bottom of the rectangular plate, and a limit groove is symmetrically provided at the top of the groove, a limit block is movably installed in the limit groove, a support rod is fixedly installed at the bottom end of the limit block and located in the groove, and one end of the two support rods is rotatably connected;

[0011] A control assembly, the control assembly is located in the fixing plate and is used to control the rotation or fixation of the bidirectional threaded rod;

[0012] Two limiting components, both of which are located in the rectangular plate and are used to limit the two limiting blocks respectively.

[0013] In the present technical scheme, the fixing plate is first fixed to the wheeled excavator by bolts, and then the staff rotates the bidirectional threaded rod through the control component. Under the action of the thread, the bidirectional threaded rod will drive the two sliders 1 to move in the moving groove and approach each other. Then, the two sliders 1 respectively drive the two connecting rods to rotate and stretch downward, so that the two ends of the two connecting rods approach each other. While approaching, the bottom ends of the two connecting rods respectively drive the two sliders 2 to slide on the round rods in the sliding groove and approach each other. Then, the two connecting rods will unfold and move downward against the rectangular plate until the bottom of the rectangular plate contacts the ground. Then, the rotation of the bidirectional threaded rod is stopped, and the bidirectional threaded rod is limited by the control component.

[0014] Afterwards, the staff pulls the two support rods outward at the connection. At this time, the two support rods will rotate around the connection and approach each other, so that the two support rods are in an expanded state. At the same time, the two support rods respectively drive the two limit blocks to approach each other in the corresponding limit grooves, until the two limit blocks can no longer move and approach each other in the two limit grooves. Then, the two support rods can be limited by two limit assemblies to prevent the two support rods from shaking.

[0015] In the above technical solution, further, the control component includes:

[0016] A power cavity, which is opened in a fixed plate and located on one side of a movable groove, a ratchet is rotatably installed in the power cavity, a pawl is slidably installed in the power cavity and located on the top of the ratchet, and the bottom end of the pawl extends into the ratchet, a pull rod is fixedly installed on the top of the pawl, and the top end of the pull rod passes through the top of the power cavity and extends to the outside, a spring 1 is sleeved on the pull rod and located in the power cavity, and the two ends of the spring 1 are tightly welded to the top of the pawl and the inner wall of the power cavity respectively, one end of the bidirectional threaded rod passes through one side of the movable groove, extends into the power cavity and is coaxially connected with the ratchet, and one side of the ratchet passes through the power cavity, extends to the outside and is fixedly installed with a rocker.

[0017] In this technical solution, the pull rod is pulled by hand, so that the pull rod drives the pawl to move upward in the power chamber, so that the pawl is disengaged from the ratchet. At the same time, the spring will shrink when it is squeezed. Then, the rocker is turned to drive the ratchet to rotate, and the ratchet drives the two-way threaded rod. After it is rotated to the appropriate position, the rocker is stopped from being turned. Under the action of the spring rebound, the spring will push the pawl into the ratchet to prevent the two-way threaded rod from shaking.

[0018] In the above technical solution, further, the bidirectional threaded rod is rotationally connected to the power chamber, the pull rod is slidingly connected to the power chamber, and the pawl is plug-fitted with the ratchet wheel.

[0019] In this technical solution, it is ensured that the bidirectional threaded rod can rotate in the power cavity; it is ensured that the pawl and the pull rod can slide in the power cavity.

[0020] In the above technical solution, further, the limit assembly includes:

[0021] A through slot, wherein the through slot is opened at the top of the limiting slot, an L-shaped plate is slidably installed in the through slot, and the lower end of the L-shaped plate extends into the limiting slot, a plurality of springs fixed to the top of the through slot are fixedly installed on the top of the L-shaped plate, and one end of the L-shaped plate passes through the through slot and extends to the outside.

[0022] In this technical solution, the two L-shaped plates are lifted up to move upward in the through slots until the L-shaped plates are separated from the limiting slots and completely enter the through slots. At the same time, the plurality of springs 2 are squeezed and will shrink.

[0023] In the above technical solution, further, one side of the L-shaped plate is in contact with the limiting block.

[0024] In this technical solution, it is ensured that the L-shaped plate can contact the limiting block and limit it.

[0025] In the above technical solution, further, a second magnet is fixedly installed on the top of the groove and located between the two limit grooves, and a first magnet is fixedly installed on the top of each of the two support rods.

[0026] In the technical solution, when the two support rods are retracted, the two support rods will be retracted into the grooves, so that the two magnets 1 on the two support rods are in contact with the magnet 2 and are magnetically connected, preventing the two support rods from being easily opened.

[0027] In the above technical solution, further, the bidirectional threaded rod is provided with two sections of threads with opposite rotation directions, and the cross-section of the limiting groove is a "T"-shaped structure.

[0028] In this technical solution, it is ensured that the bidirectional threaded rod can drive the two sliders to move closer to or away from each other when rotating; and it is ensured that the limit groove can limit the limit block.

[0029] The beneficial effects of the utility model are:

[0030] The underframe support mechanism of the wheeled excavator first fixes a fixing plate on the wheeled excavator, and then, through the bidirectional threaded rod, two sliders 1, two connecting rods, two sliders 2 and round rods, when the threaded rod is rotated, the rectangular plate can drive the two support rods to move downward, so that the bottom of the rectangular plate and the bottom of the two support rods are in contact with the ground, thereby effectively supporting the wheeled excavator, and under the action of the control component and the two limit components, the bidirectional threaded rod and the two support rods can be prevented from shaking, ensuring that the overall device does not need to use power, avoiding short circuits in places with water sources such as clearing rivers, and preventing dangers. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0032] Figure 2 This is a schematic diagram of the internal structure of the fixed plate in the utility model;

[0033] Figure 3 For this utility model Figure 2 The enlarged structural diagram at A in the middle;

[0034] Figure 4 It is a schematic diagram of the regional structure of the support rod in the utility model;

[0035] Figure 5 This is a schematic diagram of the internal structure of the rectangular plate in the utility model;

[0036] Figure 6 For this utility model Figure 5 The enlarged structural diagram at B in the middle;

[0037] Figure 7 It is a schematic diagram of the cross-sectional structure of the rectangular plate in the utility model.

[0038] The symbols in the figure are:

[0039] 1. Fixed plate; 2. Connecting rod; 3. Bidirectional threaded rod; 4. Rectangular plate; 5. Support rod; 6. Magnet 1; 7. Round rod; 8. Sliding groove; 9. Rocker; 10. Power chamber; 11. Ratchet; 12. Ratchet; 13. Spring 1; 14. Pull rod; 15. Groove; 16. Magnet 2; 17. Limiting groove; 18. Limiting block; 19. Through groove; 20. Spring 2; 21. L-shaped plate; 22. Slider 1; 23. Slider 2. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0041] Embodiment 1:

[0042] See also Figure 1 - Figure 7 As shown, this embodiment provides a wheeled excavator underframe support mechanism, comprising:

[0043] A fixed plate 1, a movable groove 24 is provided at the bottom of the fixed plate 1, a bidirectional threaded rod 3 is rotatably installed in the movable groove 24, and a slider 22 is symmetrically threadedly installed on the bidirectional threaded rod 3, and both sliders 22 slide with the movable groove 24, and the lower ends of the two sliders 22 are both rotatably installed with connecting rods 2, and the two connecting rods 2 are cross-arranged and rotatably connected;

[0044] A rectangular plate 4 is arranged below the two connecting rods 2. A sliding groove 8 is provided on the top of the rectangular plate 4. A round rod 7 is fixedly installed in the sliding groove 8. Two sliders 23 are symmetrically slidably installed on the round rod 7 and slide with the sliding groove 8. The upper ends of the two sliders 23 are rotatably connected with the two connecting rods 2 respectively.

[0045] The groove 15 is provided at the bottom of the rectangular plate 4, and the top of the groove 15 is symmetrically provided with a limit groove 17, in which a limit block 18 is movably installed, and a support rod 5 is fixedly installed at the bottom end of the limit block 18 and located in the groove 15, and one end of the two support rods 5 is rotatably connected;

[0046] A control component, which is located in the fixing plate 1 and is used to control the rotation or fixation of the bidirectional threaded rod 3;

[0047] Two limiting components, both of which are located in the rectangular plate 4 and are used to limit the two limiting blocks 18 respectively.

[0048] Among them, the fixing plate 1 is first fixed to the wheeled excavator by bolts, and then the staff rotates the bidirectional threaded rod 3 through the control component. Under the action of the thread, the bidirectional threaded rod 3 will drive the two sliders 22 to move in the moving groove 24 and approach each other. Then, the two sliders 22 respectively drive the two connecting rods 2 to rotate and stretch downward, so that the two ends of the two connecting rods 2 approach each other. While approaching, the bottom ends of the two connecting rods 2 respectively drive the two sliders 23 to slide on the round rod 7 in the sliding groove 8 and approach each other. Then, the two connecting rods 2 will unfold and move downward against the rectangular plate 4 until the bottom of the rectangular plate 4 contacts the ground. Then, the rotation of the bidirectional threaded rod 3 is stopped, and the bidirectional threaded rod 3 is limited by the control component.

[0049] Afterwards, the staff pulls the two support rods 5 outward at the connection. At this time, the two support rods 5 will rotate around the connection and approach each other, so that the two support rods 5 are in an expanded state. At the same time, the two support rods 5 respectively drive the two limit blocks 18 to approach each other in the corresponding limit grooves 17, until the two limit blocks 18 are unable to move and approach each other in the two limit grooves 17. Then, the two support rods 5 can be limited by two limit assemblies to prevent the two support rods 5 from shaking.

[0050] Embodiment 2:

[0051] This embodiment provides a wheeled excavator underframe support mechanism, which, in addition to the technical solutions of the above embodiments, also has the following technical features, and the control component includes:

[0052] A power chamber 10 is provided in the fixed plate 1 and is located on one side of the movable groove 24. A ratchet 11 is rotatably installed in the power chamber 10. A pawl 12 is slidably installed in the power chamber 10 and is located on the top of the ratchet 11. The bottom end of the pawl 12 extends into the ratchet 11. A pull rod 14 is fixedly installed on the top of the pawl 12. The top end of the pull rod 14 passes through the top of the power chamber 10 and extends to the outside. A spring 13 is sleeved on the pull rod 14 and is located in the power chamber 10. The two ends of the spring 13 are tightly welded to the top of the pawl 12 and the inner wall of the power chamber 10 respectively. One end of the bidirectional threaded rod 3 passes through one side of the movable groove 24, extends into the power chamber 10 and is coaxially connected with the ratchet 11. One side of the ratchet 11 passes through the power chamber 10, extends to the outside and is fixedly installed with a rocker 9.

[0053] Among them, the pull rod 14 is pulled by hand, so that the pull rod 14 drives the pawl 12 to move upward in the power chamber 10, so that the pawl 12 is disengaged from the ratchet 11. At the same time, the spring 13 will shrink due to being squeezed, and then the rocker 9 is turned to make the rocker 9 drive the ratchet 11 to rotate, and the ratchet 11 drives the two-way threaded rod 3. After it is rotated to a suitable position, the rocker 9 is stopped. Under the action of the rebound of the spring 13, the spring 13 will push the pawl 12 and insert into the ratchet 11 to prevent the two-way threaded rod 3 from shaking.

[0054] Embodiment 3:

[0055] The present embodiment provides a wheeled excavator underframe support mechanism, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features: the bidirectional threaded rod 3 is rotatably connected to the power chamber 10, the pull rod 14 is slidably connected to the power chamber 10, and the pawl 12 is plugged into and matched with the ratchet wheel 11.

[0056] Among them, it is ensured that the bidirectional threaded rod 3 can rotate in the power chamber 10 ; and it is ensured that the pawl 12 and the pull rod 14 can slide in the power chamber 10 .

[0057] Embodiment 4:

[0058] This embodiment provides a wheeled excavator underframe support mechanism, which, in addition to the technical solutions of the above embodiments, also has the following technical features, and the limit assembly includes:

[0059] A through slot 19 is provided at the top of the limiting slot 17, an L-shaped plate 21 is slidably installed in the through slot 19, and the lower end of the L-shaped plate 21 extends into the limiting slot 17, a plurality of springs 20 fixed to the top of the through slot 19 are fixedly installed on the top of the L-shaped plate 21, and one end of the L-shaped plate 21 passes through the through slot 19 and extends to the outside.

[0060] The two L-shaped plates 21 are lifted up to move upward in the through slot 19 until the L-shaped plates 21 are separated from the limiting slot 17 and completely enter the through slot 19 . Meanwhile, the plurality of springs 20 are squeezed and contracted.

[0061] Embodiment 5:

[0062] This embodiment provides a wheeled excavator underframe support mechanism, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features: one side of the L-shaped plate 21 is in contact with the limit block 18.

[0063] Here, it is ensured that the L-shaped plate 21 can contact with the limiting block 18 and limit it.

[0064] Embodiment 6:

[0065] The present embodiment provides a wheeled excavator underframe support mechanism, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features: a magnet 2 16 is fixedly installed at the top of the groove 15 and between the two limit grooves 17, and a magnet 1 6 is fixedly installed at the top of the two support rods 5.

[0066] When the two support rods 5 are retracted, the two support rods 5 will be retracted into the groove 15, so that the two magnets 1 6 on the two support rods 5 are in contact with the magnet 2 16 and are magnetically connected, preventing the two support rods 5 from being easily opened.

[0067] Embodiment 7:

[0068] This embodiment provides a wheeled excavator underframe support mechanism, which, in addition to the technical solutions of the above-mentioned embodiments, also has the following technical features: the bidirectional threaded rod 3 is provided with two sections of threads with opposite rotation directions, and the cross-section of the limiting groove 17 is a "T"-shaped structure.

[0069] Among them, it is ensured that the bidirectional threaded rod 3 can drive the two sliders 22 to move closer to or away from each other when rotating; and it is ensured that the limiting groove 17 can limit the limiting block 18.

[0070] It is worth noting that when the two support rods 5 are in the unfolded state, they present a “V”-shaped structure; when the two support rods 5 are in the retracted state, they present an “I”-shaped structure, and both support rods 5 are located in the groove 15 .

[0071] Working principle: when cleaning the river channel, the fixing plate 1 is fixed to the wheeled excavator by bolts, and the staff lifts the two L-shaped plates 21 to make the L-shaped plates 21 move upward in the through groove 19 until the L-shaped plates 21 are separated from the limiting groove 17 and completely enter the through groove 19. At the same time, the plurality of springs 20 will be squeezed and will shrink. Then, the two support rods 5 are pulled outward at the connection by hand. At this time, the two support rods 5 will rotate around the connection as the axis and approach each other, so that the two support rods 5 are in an unfolded state. At the same time, the two support rods 5 will respectively drive the two limiting blocks 18 to approach each other in the corresponding limiting grooves 17 until the two limiting blocks 18 cannot move and approach each other in the two limiting grooves 17. Then, under the action of the rebound of the plurality of springs 20, the plurality of springs 20 will push the L-shaped plate 21 to move downward until the L-shaped plate 21 enters the limiting groove 17 and contacts the side of the limiting block 18 away from the magnet 2 16, thereby limiting the two support rods 5.

[0072] Subsequently, the staff pulls the pull rod 14 by hand, so that the pull rod 14 drives the pawl 12 to move upward in the power chamber 10, so that the pawl 12 is disengaged from the ratchet 11. At the same time, the spring 13 is squeezed and will shrink. Subsequently, the rocker 9 is turned to drive the ratchet 11 to rotate, and the ratchet 11 drives the two-way threaded rod 3 to rotate. Under the action of the thread, the two-way threaded rod 3 will drive the two sliders 22 to move in the moving groove 24 and approach each other. Subsequently, the two sliders 22 will respectively drive the two connecting rods 2 to rotate and stretch downward, so that the two ends of the two connecting rods 2 are close to each other. , the bottom ends of the two connecting rods 2 will respectively drive the two sliding blocks 23 to slide on the round rod 7 in the sliding groove 8 and approach each other. Then, the two connecting rods 2 will unfold and move downward against the rectangular plate 4 until the bottom of the rectangular plate 4 and the two supporting rods 5 are in contact with the ground, thereby supporting the wheeled excavator. Then, stop rotating the rocker 9. Under the action of the rebound of the spring 13, the spring 13 will push the pawl 12 and insert into the ratchet 11 to prevent the two-way threaded rod 3 from shaking, ensuring that the entire device does not need to use power, avoiding short circuits in places with water sources such as cleaning rivers, and preventing dangers.

[0073] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A wheeled excavator underframe support mechanism, characterized in that: include: A fixed plate (1), wherein a movable groove (24) is provided at the bottom of the fixed plate (1), a bidirectional threaded rod (3) is rotatably mounted in the movable groove (24), and a slider (22) is symmetrically threadedly mounted on the bidirectional threaded rod (3) and slides with the movable groove (24), and a connecting rod (2) is rotatably mounted at the lower end of two sliders (22), and the two connecting rods (2) are cross-arranged and the two connecting rods (2) are rotatably connected; A rectangular plate (4), the rectangular plate (4) being arranged below the two connecting rods (2), a sliding groove (8) being provided on the top of the rectangular plate (4), a round rod (7) being fixedly installed in the sliding groove (8), and two sliding blocks (23) sliding with the sliding groove (8) being symmetrically installed on the round rod (7), the upper ends of the two sliding blocks (23) being rotatably connected with the two connecting rods (2) respectively; A groove (15), wherein the groove (15) is provided at the bottom of the rectangular plate (4), and a limiting groove (17) is symmetrically provided at the top of the groove (15), a limiting block (18) is movably installed in the limiting groove (17), and a support rod (5) is fixedly installed at the bottom end of the limiting block (18) and located in the groove (15), and one end of the two support rods (5) are rotatably connected; A control component, the control component is located in the fixing plate (1) and is used to control the rotation or fixation of the bidirectional threaded rod (3); Two limiting components, both of which are located in the rectangular plate (4) and are used to limit the two limiting blocks (18) respectively.

2. A wheeled excavator underframe support mechanism according to claim 1, characterized in that: The control component comprises: A power chamber (10), the power chamber (10) is opened in the fixed plate (1) and is located on one side of the movable groove (24), a ratchet (11) is rotatably installed in the power chamber (10), a pawl (12) is slidably installed in the power chamber (10) and located on the top of the ratchet (11), and the bottom end of the pawl (12) extends into the ratchet (11), a pull rod (14) is fixedly installed on the top of the pawl (12), and the top end of the pull rod (14) passes through the top of the power chamber (10) and extends to the outside; a spring (13) is sleeved on the pull rod (14) and is located in the power chamber (10), and the two ends of the spring (13) are tightly welded to the top of the pawl (12) and the inner wall of the power chamber (10), respectively; one end of the bidirectional threaded rod (3) passes through one side of the movable groove (24) and extends into the power chamber (10) and is coaxially connected with the ratchet (11); one side of the ratchet (11) passes through the power chamber (10) and extends to the outside and is fixedly installed with a rocker (9).

3. A wheeled excavator underframe support mechanism according to claim 2, characterized in that: The bidirectional threaded rod (3) is rotationally connected to the power chamber (10), the pull rod (14) is slidingly connected to the power chamber (10), and the pawl (12) is plug-fitted to the ratchet wheel (11).

4. A wheeled excavator underframe support mechanism according to claim 1, characterized in that: The limiting component comprises: A through slot (19), the through slot (19) being arranged at the top of the limiting slot (17), an L-shaped plate (21) being slidably mounted in the through slot (19), and the lower end of the L-shaped plate (21) extending into the limiting slot (17), a plurality of springs (20) being fixed to the top of the through slot (19) being fixedly mounted on the top of the L-shaped plate (21), and one end of the L-shaped plate (21) passing through the through slot (19) and extending to the outside.

5. The underframe support mechanism for a wheeled excavator according to claim 4, characterized in that: One side of the L-shaped plate (21) is in contact with the limiting block (18).

6. The underframe support mechanism for a wheeled excavator according to claim 1, characterized in that: A second magnet (16) is fixedly mounted on the top of the groove (15) and between the two limiting grooves (17), and a first magnet (6) is fixedly mounted on the top of each of the two support rods (5).

7. The underframe support mechanism for a wheeled excavator according to claim 1, characterized in that: The bidirectional threaded rod (3) is provided with two sections of threads with opposite rotation directions, and the cross section of the limiting groove (17) is in a "T"-shaped structure.

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