Leveling leg mechanism, engineering machine and caterpillar tower machine

Abstract

The application discloses a leveling supporting leg mechanism, engineering machinery and a crawler-type tower crane, which comprises a telescopic rod (2) for supporting an upper assembly (11), a telescopic seat (1) for connecting a lower assembly and a driving screw sleeve (3), the outer circumferential surface of the telescopic rod (2) and the telescopic seat (1) is formed with external threads in opposite spiral directions, the inner circumferential surface of the two end portions of the driving screw sleeve (3) is formed with internal threads, the driving screw sleeve (3) is sleeved on the telescopic rod (2) and the telescopic seat (1) and is in threaded connection, and the driving screw sleeve (3) is provided with a leveling driving device (5). The bidirectional threaded connection formed by the driving screw sleeve can not only effectively perform leveling, but also can bear pressure and tension through the threaded connection, and can adapt to horizontal load and effectively adapt to the walking characteristics of the walking engineering machinery.

Description

Technical Field

[0001] This invention relates to a leveling mechanism, specifically a leveling outrigger mechanism. Furthermore, this invention also relates to engineering machinery and crawler tower cranes that include the aforementioned leveling outrigger mechanism. Background Technology

[0002] Construction machinery, especially large or super-large mobile construction machinery, often faces challenges due to the poor road conditions and uneven surfaces at construction sites. The working mechanisms of construction machinery, such as concrete pump trucks and truck cranes, often have a certain working height. Uneven road surfaces can cause the center of gravity of construction machinery to shift, which can easily lead to operational accidents due to instability.

[0003] Typically, for example, in tower cranes, the jib is mounted at the top of the tower. If the base support structure becomes tilted due to uneven ground, it could lead to serious operational accidents. Therefore, tower cranes generally require a leveling mechanism to adjust the level of the tower crane base. However, given the current state of tower crane technology, while stationary tower cranes have some existing leveling mechanisms, mobile tower cranes, due to their unfixed base and less mature technology, have higher requirements for ground slope (flatness), and currently lack leveling mechanisms specifically designed for ground slope (flatness).

[0004] Currently, the leveling outriggers used in construction machinery are mainly self-locking hydraulic cylinder outriggers. Although hydraulic cylinder outriggers are easy to adjust, they can only withstand relatively small tensile forces and have limited lateral force tolerance, which cannot exceed 10% of the vertical force. Therefore, when mobile construction machinery travels on roads, swaying and bumping due to road conditions often generate tensile and lateral loads, making hydraulic outrigger cylinders unsuitable.

[0005] Furthermore, existing technologies also include a few mechanical leveling outriggers, such as linkage-type mechanical outriggers, which occupy a large space and are generally unsuitable for construction machinery applications. Moreover, due to unreasonable design of the load-bearing connection structure, these mechanical outriggers often have a relatively small tensile load capacity. In particular, because the superstructure of construction machinery is extremely heavy, adjustment is very difficult and inconvenient, making fine adjustments impossible and rendering them unsuitable for applications requiring leveling.

[0006] Furthermore, construction machinery, especially large or super-large mobile construction machinery, not only needs to be leveled to adapt to road conditions, but also needs to take into account steering requirements. Due to their huge weight and high road adhesion, steering is very difficult. How to integrate steering design into the leveling outriggers and make the steering function smoothly realized by utilizing the function of the leveling outriggers is also a relatively difficult technical problem.

[0007] In view of this, a new type of leveling support leg needs to be designed. Summary of the Invention

[0008] The fundamental technical problem to be solved by this invention is to provide a leveling outrigger mechanism that can effectively level itself according to road conditions and can effectively withstand tensile, compressive and horizontal lateral loads.

[0009] Furthermore, the technical problem to be solved by the present invention is to provide an engineering machine and a tracked tower crane that can adapt to road conditions and effectively level itself, and can effectively withstand tensile, compressive and horizontal lateral loads.

[0010] To solve the above-mentioned technical problems, the present invention provides a leveling support leg mechanism, which includes a telescopic rod for supporting the upper assembly, a telescopic seat for connecting the lower assembly, and a drive screw sleeve. The outer peripheral surfaces of the telescopic rod and the telescopic seat are formed with external threads in opposite directions, and the inner peripheral surfaces of the two ends of the drive screw sleeve are formed with internal threads. The drive screw sleeve is fitted onto the telescopic rod and the telescopic seat and is threadedly engaged. The drive screw sleeve is correspondingly provided with a leveling drive device for driving the drive screw sleeve to rotate.

[0011] Preferably, the leveling drive device includes a leveling rotary drive mechanism, a leveling deceleration mechanism, and a leveling drive gear fixed on the output shaft of the leveling deceleration mechanism. The leveling drive gear meshes with a gear ring disposed on the outer circumferential surface of the drive sleeve.

[0012] Specifically, the upper and lower ends of the central through hole of the drive screw sleeve each have an inwardly protruding inner flange, and the internal thread is formed on the inner flanges of the upper and lower ends.

[0013] More specifically, both the telescopic seat and the leveling drive device are fixed to the base, so that the telescopic seat can be fixed to the lower assembly via the base.

[0014] Preferably, the upper end of the telescopic rod is connected to the upper assembly via a ball joint or a slewing bearing.

[0015] More preferably, an external gear ring is installed on the outer periphery of the upper end of the telescopic rod, and a steering drive device is installed at the bottom of the upper assembly. The steering drive device includes a rotary power mechanism, a reduction mechanism that is transmitted to the rotary power mechanism, and a steering drive gear connected to the output shaft of the reduction mechanism. The steering drive gear meshes with the external gear ring.

[0016] Particularly preferably, the telescopic seat is the cylinder body of a hydraulic cylinder, and the extended end of the piston rod of the hydraulic cylinder faces the lower end face of the telescopic rod so as to extend to contact the lower end face of the telescopic rod to provide auxiliary hydraulic support.

[0017] In addition, the present invention also provides an engineering machinery, wherein the engineering machinery includes a leveling outrigger mechanism of any of the above technical solutions, wherein the upper assembly of the engineering machinery is supported and connected to the upper end of the telescopic rod, and the telescopic seat is directly or indirectly fixed to the lower assembly of the engineering machinery.

[0018] Furthermore, the present invention provides a tracked tower crane, wherein the tracked tower crane includes the leveling outrigger mechanism of any of the above technical solutions, wherein the base frame of the tracked tower crane is supported and connected to the upper end of the telescopic rod, and the telescopic seat is directly or indirectly fixed to the frame of the tracked walking mechanism of the tracked tower crane.

[0019] Preferably, the tracked tower crane includes at least four independent tracked traveling mechanisms and leveling outrigger mechanisms corresponding to each of the tracked traveling mechanisms. At least four corners of the base frame of the tracked tower crane are supported and connected to the upper ends of the telescopic rods of the corresponding leveling outrigger mechanisms, and the telescopic seats of each leveling outrigger mechanism are directly or indirectly fixed to the frame of the corresponding tracked traveling mechanism.

[0020] Specifically, each of the tracked walking mechanisms includes two tracks arranged side by side, each of the tracked walking mechanisms includes its own independent frame, and the two tracks of each of the tracked walking mechanisms are connected through their respective frames.

[0021] Through the above technical solution, this invention cleverly employs a bidirectional threaded drive sleeve that engages with the telescopic rod and telescopic seat. A leveling drive device rotates the drive sleeve. Since the threads of the telescopic seat and the telescopic rod are opposite in direction, controlling the rotation direction of the drive sleeve effectively brings the distance between the lower end face of the telescopic rod and the upper end face of the telescopic seat closer or larger, thus effectively achieving leveling. Simultaneously, because the drive sleeve is threadedly engaged with the telescopic rod and telescopic seat, the pressure, tension, and lateral horizontal loads generated by various road conditions when the construction machinery travels on the road can be effectively borne through the mechanical thread engagement. In particular, this invention uses a precise thread engagement; by adjusting the thread pitch and the number of rotations, relatively fine micro-adjustments can be achieved. It occupies little space, has a compact structure, and is more suitable for use with construction machinery. Furthermore, this invention includes a leveling drive device, which drives the drive sleeve to rotate counterclockwise or clockwise, making the leveling operation simpler and faster.

[0022] Furthermore, in a preferred embodiment of the present invention, the leveling outrigger mechanism integrates a hydraulic auxiliary support device, namely, an oil cylinder. Even if adjustment is difficult due to the weight of the ultra-large engineering machinery in some cases, the piston rod of the oil cylinder can be extended to contact the lower end face of the telescopic rod through the extension and retraction operation of the oil cylinder, thereby providing auxiliary hydraulic support. Moreover, the pressing action of the oil cylinder makes the threaded leveling operation easier and less strenuous.

[0023] In particular, in a more preferred embodiment of the invention, the telescopic pole integrates a cooperating component for the steering drive mechanism. In this case, when steering is not performed, the leveling outrigger mechanism cannot rotate because the telescopic pole is constrained by the steering drive mechanism and the telescopic seat is constrained by the lower assembly. The telescopic pole can only move closer to or further away from the telescopic seat in the vertical direction, achieving vertical leveling within the leveling telescopic range. When steering is required, the lifting function of the leveling outrigger mechanism can be fully utilized. Driven by the leveling drive device, the telescopic pole and telescopic seat are brought close together, thereby lifting the lower assembly connected to the telescopic seat to a certain extent, reducing pressure on the road surface and decreasing adhesion. Then, driven by the steering drive mechanism, steering can be achieved relatively easily. Especially in engineering machinery with independent all-wheel steering, since each walking mechanism is formed as an independent walking mechanism (i.e., all four wheels are formed as independent walking wheels), and each walking mechanism has an independent frame, this type of engineering machinery with independent all-wheel steering can lift each walking mechanism one by one through the corresponding leveling outrigger mechanism of the present invention, and turn each walking mechanism one by one, thereby making the steering operation more reliable, safe, convenient and easy.

[0024] Other features and advantages of the present invention will be described in detail in the following detailed description section. Attached Figure Description

[0025] The following figures are provided to further illustrate the invention and form part of the specification. They, together with the detailed embodiments described below, serve to explain the invention, but the scope of protection of the invention is not limited to the following figures and detailed embodiments. In the figures:

[0026] Figure 1 This is a partial cross-sectional schematic diagram of a leveling support leg mechanism according to a specific embodiment of the present invention, showing that the telescopic seat and the telescopic rod are in a state of close proximity to each other.

[0027] Figure 2 yes Figure 1 The partial sectional view of the leveling outrigger mechanism shown indicates that the telescopic seat and the telescopic rod are in a state of being far apart from each other; and

[0028] Figure 3This is a partial cross-sectional schematic diagram of the leveling support leg mechanism according to another specific embodiment of the present invention.

[0029] Explanation of reference numerals in the accompanying drawings of this invention:

[0030] 1. Telescopic base; 2. Telescopic pole;

[0031] 3. Drive screw sleeve; 4. Base;

[0032] 5. Leveling drive device; 6. Leveling drive gear;

[0033] 7. External gear ring; 8a. Ball joint;

[0034] 8b Slewing bearing; 9 Steering drive unit;

[0035] 10. Steering drive gear; 11. Upper body assembly;

[0036] 12 Piston rods. Detailed Implementation

[0037] The following description uses a crawler tower crane as an example to illustrate the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of the present invention, and the scope of protection of the present invention is not limited to the specific embodiments described below. The present invention can also be used as an independent steering chassis for other engineering machinery such as concrete pump trucks and truck cranes.

[0038] It should be noted beforehand that the directional terms used in the descriptions of the various embodiments below, such as "bottom", "upper", "lower", "below", etc., are distinguished according to the technical meaning of the upper and lower arrangement of the leveling outrigger mechanism of the construction machinery (such as tower crane) in the normal installation state.

[0039] Furthermore, although the leveling outrigger mechanism of the present invention can be universally applied to various types of engineering machinery, especially large or super-large mobile engineering machinery, such as concrete pumps and truck cranes, in order to facilitate the specific understanding of the technical solution, the following description focuses on mobile tower cranes (i.e., tower cranes), such as crawler tower cranes, but the scope of protection of the present invention should not be limited to mobile tower cranes. The relevant leveling outrigger structure or matching structure mentioned on crawler tower cranes can be applied to other engineering machinery.

[0040] See Figures 1 to 3The leveling support leg mechanism of the present invention mainly includes a telescopic rod 2 for supporting the upper assembly 11, a telescopic seat 1 for connecting the lower assembly, and a drive screw sleeve 3. The outer peripheral surfaces of the telescopic rod 2 and the telescopic seat 1 are formed with external threads in opposite directions. The inner peripheral surfaces of the two ends of the drive screw sleeve 3 can be formed with internal threads. The drive screw sleeve 3 is fitted onto the telescopic rod 2 and the telescopic seat 1 and is threadedly engaged. The drive screw sleeve 3 is correspondingly provided with a leveling drive device 5 for driving the drive screw sleeve 3 to rotate.

[0041] In the above basic implementation, it should be understood that the upper assembly 11 generally refers to the upper component supported by the leveling outrigger mechanism of the construction machinery. For example, for tower cranes, it generally refers to the base frame and the tower body above the base frame. The lower assembly generally refers to the frame or support frame of mobile construction machinery, and for stationary construction machinery, it can be the ground-fixed foundation.

[0042] The leveling outrigger mechanism of the above-described basic embodiment of the present invention cleverly employs a bidirectional threaded drive sleeve 3 that engages with the telescopic rod 2 and the telescopic seat 1. The driving sleeve 3 rotates via the leveling drive device 5. Since the threads of the telescopic seat 1 and the telescopic rod 2 are opposite in direction and constrained by the upper assembly 11 and the lower assembly respectively (i.e., they cannot rotate under normal non-steering conditions), controlling the rotation direction of the drive sleeve 3 effectively brings the distance between the lower end face of the telescopic rod 2 and the upper end face of the telescopic seat 1 closer or increases, thereby effectively achieving leveling. Simultaneously, because the drive sleeve 3 is threadedly engaged with the telescopic rod 2 and the telescopic seat 1, the pressure, tension, and lateral horizontal loads generated by various road conditions when the construction machinery travels on the road surface can be effectively borne through the mechanical thread engagement. In particular, the present invention employs a precise thread engagement; through the pitch and the number of rotations, relatively fine micro-adjustments can be achieved. It occupies little space, has a compact structure, and is more suitable for the use of construction machinery. Furthermore, the present invention is provided with a leveling drive device 5, which drives the drive screw sleeve to rotate counterclockwise or clockwise, thereby making the leveling operation simpler and faster.

[0043] Based on the above basic implementation method, see Figure 1The leveling drive device 5 may include a leveling rotary drive mechanism, a leveling reduction mechanism, and a leveling drive gear 6 fixed on the output shaft of the leveling reduction mechanism. The leveling drive gear 6 meshes with a gear ring on the outer circumferential surface of the drive sleeve 3. The ingenuity of this leveling drive device lies in the fact that, through the meshing of the leveling drive gear 6 with the gear ring, the gear ring can form the required axial length on the outer circumferential surface of the drive sleeve 3. Thus, within the adjustment range of the normal leveling operation, since the lower assembly generally does not detach from the ground under normal working conditions, and the telescopic rod 2 and the drive sleeve 3 generally move vertically, the gear ring on the drive sleeve 3, due to its required axial length, will not disengage from the leveling drive gear 6 even if it moves. This solves the compatibility problem of ordinary drive mechanisms being unable to adapt to the vertical movement of the leveling outrigger mechanism, making the machine drive leveling outrigger mechanism effective, reliable, and with excellent working stability.

[0044] Preferably, see Figure 1 and Figure 2 As shown, as a structural form, the upper and lower ends of the central through hole of the drive sleeve 3 can each have inwardly protruding inner flanges (similar to an inner flange with a set thickness), and the aforementioned internal threads can be formed on the inner flanges at the upper and lower ends. This structural form actually forms a cavity in the middle part of the drive sleeve 3, allowing the lower part of the telescopic rod 2 and the upper part of the telescopic seat 1 to be accommodated in the cavity. At the same time, the threaded engagement is formed through the structure of the inner flanges, ensuring that the threaded engagement is not interfered with by other parts of the drive sleeve 3, which is more conducive to the adjustment of the relative position of the telescopic rod 2 and the telescopic seat 1.

[0045] Specifically, the leveling support leg mechanism of the present invention may further include a base 4, so that both the telescopic seat 1 and the leveling drive device 5 can be fixed on the base 4. When installed on the lower assembly (e.g., the vehicle frame), it can be installed as a whole through the base 4, so that the telescopic seat 1 can be indirectly fixed to the lower assembly via the base 4. Of course, within the scope of the technical concept of the present invention, the telescopic seat 1 and the leveling drive device 5 can also be directly fixed to the vehicle frame separately, which does not affect the realization of the leveling drive function and is also within the protection scope of the present invention.

[0046] Preferably, see Figure 1 The upper end of the telescopic rod 2 can be connected to the upper assembly 11 via a ball joint 8a. This ball joint connection can be equipped with a certain deflection limiting mechanism (such as a stop block) to limit the deflection angle and prevent excessive relative deflection between the upper assembly 11 and the lower assembly. This ball joint connection can effectively adapt to various road conditions, and its appropriate deflection can make the movement of the construction machinery more stable. Alternatively, see [link to other documentation]. Figure 3 The upper end of the telescopic rod 2 can also be connected to the upper assembly 11 by a slewing bearing 8b.

[0047] The aforementioned rotary connection structure provides the structural basis for integrating the steering function into the leveling outrigger mechanism of this invention. Specifically, an external gear ring 7 can be installed on the outer periphery of the upper end of the telescopic rod 2, and a steering drive device 9 can be installed on the bottom of the upper assembly 11. The steering drive device 9 includes a rotary power mechanism, a reduction mechanism connected to the rotary power mechanism, and a steering drive gear 10 connected to the output shaft of the reduction mechanism. The steering drive gear 10 meshes with the external gear ring 7. In a more preferred embodiment of this invention, the telescopic rod integrates the mating components of the steering drive mechanism. In this case, when steering is not performed, the leveling outrigger mechanism cannot rotate because the telescopic rod 2 is constrained by the steering drive mechanism and the telescopic seat 1 is constrained by the lower assembly. It can only move the telescopic rod 2 closer to or further away from the telescopic seat 1 in the vertical direction, realizing the vertical leveling operation within the leveling telescopic range. In this preferred embodiment, when steering is required, the lifting function of the leveling outrigger mechanism can be fully utilized. Driven by the leveling drive device, the telescopic rod 2 and the telescopic seat 1 are brought close together, thereby lifting the lower assembly connected to the telescopic seat 1 to a certain extent, reducing pressure on the road surface and decreasing adhesion. Then, driven by the steering drive mechanism, steering can be achieved relatively easily. Especially in engineering machinery with all-wheel independent steering, since each traveling mechanism is an independent traveling mechanism (i.e., all four wheels are independent traveling wheels), and each traveling mechanism has an independent frame, this type of engineering machinery with all-wheel independent steering can use the corresponding leveling outrigger mechanism of this invention to lift each traveling mechanism one by one, and steer each traveling mechanism individually, making steering operation more reliable, safe, convenient, and easy.

[0048] More preferably, see Figure 3 The aforementioned telescopic seat 1 serves as the cylinder body of the hydraulic cylinder. The extended end of the piston rod 12 of the hydraulic cylinder faces the lower end face of the telescopic rod 2. Thus, during operation, the piston rod 12 can be extended to contact the lower end face of the telescopic rod 2 as needed, thereby providing auxiliary hydraulic support. This preferred embodiment of the leveling outrigger mechanism of the present invention effectively integrates a hydraulic auxiliary support device, i.e., integrates a hydraulic cylinder. Even in individual cases where the weight of ultra-large engineering machinery makes adjustment difficult, the extension and retraction operation of the hydraulic cylinder, extending the piston rod to contact the lower end face of the telescopic rod, provides auxiliary hydraulic support. Furthermore, the pressing action of the hydraulic cylinder makes the threaded leveling operation easier and less strenuous, avoiding phenomena such as thread jamming.

[0049] Based on the leveling outrigger mechanism described above, the present invention provides an engineering machinery that may include the leveling outrigger mechanism described in any of the above embodiments, wherein the upper assembly 11 of the engineering machinery is supported and connected to the upper end of the telescopic rod 2, and the telescopic seat 1 is directly or indirectly fixed to the lower assembly of the engineering machinery.

[0050] Typically, the aforementioned construction machinery can be a tracked tower crane. Such a tracked tower crane may include at least four independent tracked traveling mechanisms and the aforementioned leveling outrigger mechanisms corresponding to each of the tracked traveling mechanisms. At least four corners of the base frame of the tracked tower crane are supported and connected to the upper ends of the telescopic rods 2 of the corresponding leveling outrigger mechanisms, and the telescopic seats 1 of each leveling outrigger mechanism are directly or indirectly fixed to the frame of the corresponding tracked traveling mechanism.

[0051] Each tracked traveling mechanism includes two tracks arranged side by side, and each tracked traveling mechanism includes its own independent frame. The two tracks of each tracked traveling mechanism are connected through their respective frames.

[0052] See Figure 1 and Figure 3 In the illustrated preferred typical application embodiment of the tracked tower crane, under normal driving conditions without steering, when leveling operations are performed on uneven surfaces, the leveling outrigger mechanism cannot rotate because the telescopic rod 2 is constrained by the steering drive mechanism fixed to the base frame, and the telescopic seat 1 is constrained by the tracked walking mechanism frame. The telescopic rod 2 can only move closer to or further away from the telescopic seat 1 in the vertical direction, achieving vertical leveling operations within the telescopic stroke range. When steering is required, the lifting function of the leveling outrigger mechanism can be fully utilized. Driven by the leveling drive device 5, the telescopic rod 2 and the telescopic seat 1 are brought close together, thereby lifting the independent tracked walking mechanism connected to a certain telescopic seat 1 to a certain extent, reducing pressure on the road surface and decreasing adhesion. Then, driven by the steering drive mechanism, steering of the tracked walking mechanism can be achieved relatively easily. Furthermore, after the previous tracked walking mechanism completes the turn, the corresponding walking mechanisms can be lifted one by one by other corresponding leveling outrigger mechanisms of the present invention, and each tracked walking mechanism can be turned one by one, thereby making the turning operation more reliable, safe, convenient and easy.

[0053] It should be noted that although the present invention has been described above mainly using a tracked tower crane as an example, especially the preferred features related to the independent traveling mechanism, within the scope of the technical concept of the present invention, it can be applied to a variety of engineering machinery, such as truck cranes and concrete pump trucks. When applied to other engineering machinery, the tower crane base frame can be replaced with the outrigger unit superstructure assembly (i.e., the superstructure load installed on the upper part of the leveling telescopic outrigger unit), and the traveling mechanism can be a wheel or other traveling mechanism. These all fall within the protection scope of the present invention.

[0054] As can be seen from the above description, the advantages of this invention are as follows: This invention cleverly employs a bidirectional threaded drive sleeve 3 that engages with the telescopic rod 2 and the telescopic seat 1. The driving sleeve 3 rotates via the leveling drive device 5. Since the threads of the telescopic seat 1 and the telescopic rod 2 are opposite in direction and are constrained by the upper assembly 11 and the lower assembly respectively, controlling the rotation direction of the drive sleeve 3 effectively brings the distance between the lower end face of the telescopic rod 2 and the upper end face of the telescopic seat 1 closer or larger, thereby effectively achieving leveling. Simultaneously, because the drive sleeve 3 is threadedly engaged with the telescopic rod 2 and the telescopic seat 1, the pressure, tension, and lateral horizontal loads generated by various road conditions when the construction machinery travels on the road surface can be effectively borne through the mechanical thread engagement. In particular, this invention uses a precise thread engagement; through the pitch and the number of rotations, relatively fine micro-adjustments can be achieved. It occupies little space, has a compact structure, and is more suitable for the use of construction machinery. Furthermore, this invention includes a leveling drive device 5, which drives the drive sleeve to rotate counterclockwise or clockwise, making the leveling operation simpler and faster. Its structure is simple and compact, and the leveling operation is simple and reliable. In particular, the leveling support leg mechanism of this invention can integrate a hydraulic auxiliary support device, providing auxiliary hydraulic support when necessary. Moreover, through the pressing action of the cylinder, the leveling operation of threaded connections can be made easier and less strenuous, avoiding phenomena such as thread jamming.

[0055] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0056] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0057] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A walking construction machine characterized by comprising: The engineering machine comprises a leveling outrigger mechanism, which comprises a telescopic rod (2) for supporting an upper assembly (11), a telescopic seat (1) for connecting a lower assembly, and a driving sleeve (3), the outer circumferential surfaces of the telescopic rod (2) and the telescopic seat (1) are formed with external threads in opposite directions, the inner circumferential surfaces of the two end portions of the driving sleeve (3) are formed with internal threads, the driving sleeve (3) is sleeved on the telescopic rod (2) and the telescopic seat (1) and is threadedly connected, and the driving sleeve (3) is correspondingly provided with a leveling driving device (5) for driving the driving sleeve (3) to rotate, wherein the upper assembly (11) of the engineering machine is supported and connected to the upper end of the telescopic rod (2), the telescopic seat (1) is directly or indirectly fixed to the lower assembly of the engineering machine, the upper end of the telescopic rod (2) is connected to the upper assembly (11) through a spherical hinge (8a) or a rotary bearing (8b), an outer ring gear (7) is mounted on the outer circumferential edge of the upper end of the telescopic rod (2), and a steering driving device (9) is mounted on the bottom of the upper assembly, the steering driving device (9) comprises a rotary power mechanism, a speed reduction mechanism connected to the rotary power mechanism, and a steering driving gear (10) connected to the output shaft of the speed reduction mechanism, and the steering driving gear is engaged with the outer ring gear (7).

2. The walking construction machine according to claim 1, characterized by The leveling driving device (5) comprises a leveling rotary driving mechanism, a leveling speed reduction mechanism, and a leveling driving gear (6) fixed to the output shaft of the leveling speed reduction mechanism, and the leveling driving gear (6) is engaged with the ring gear arranged on the outer circumferential surface of the driving sleeve (3).

3. The walking construction machine according to claim 1, characterized by The upper and lower end portions of the central through hole of the driving sleeve (3) have inwardly protruding inner flanges, respectively, and the internal threads are formed on the inner flanges of the upper and lower end portions.

4. The walking construction machine according to claim 1, characterized by The telescopic seat (1) and the leveling driving device (5) are fixed to the base (4), so that the telescopic seat (1) can be fixed to the lower assembly through the base (4).

5. The walking construction machine according to any one of claims 1 to 4, characterized by, The telescopic seat (1) is a cylinder body of an oil cylinder, and the extending end of the piston rod (12) of the oil cylinder faces the lower end surface of the telescopic rod (2) to be able to extend to contact the lower end surface of the telescopic rod (2) to provide auxiliary hydraulic support.

6. A crawler crane, characterized in that The crawler crane comprises a leveling outrigger mechanism, which comprises an extension rod (2) for supporting an upper assembly (11), an extension base (1) for connecting a lower assembly, and a driving screw sleeve (3), the extension rod (2) and the extension base (1) are formed with external threads in opposite directions on the outer circumferential surfaces thereof, the driving screw sleeve (3) is formed with internal threads on the inner circumferential surfaces of the two end portions thereof, the driving screw sleeve (3) is sleeved on the extension rod (2) and the extension base (1) and is threadedly connected, and the driving screw sleeve (3) is correspondingly provided with a leveling driving device (5) for driving the driving screw sleeve (3) to rotate, wherein the chassis of the crawler crane is supported and connected to the upper end of the extension rod (2), the extension base (1) is directly or indirectly fixed to the frame of the crawler traveling mechanism of the crawler crane, the upper end of the extension rod (2) is connected to the upper assembly (11) through a ball hinge (8a) or a rotary bearing (8b), an external gear ring member (7) is mounted on the outer circumferential edge of the upper end of the extension rod (2), a steering driving device (9) is mounted at the bottom of the upper assembly, the steering driving device (9) comprises a rotary power mechanism, a speed reduction mechanism connected to the rotary power mechanism, and a steering driving gear (10) connected to the output shaft of the speed reduction mechanism, and the steering driving gear is engaged with the external gear ring member (7).

7. The crawler crane of claim 6, wherein The crawler crane comprises at least four independent crawler traveling mechanisms and the leveling outrigger mechanisms corresponding to each of the crawler traveling mechanisms, wherein at least four corner portions of the chassis of the crawler crane are supported and connected to the upper ends of the extension rods (2) of the corresponding leveling outrigger mechanisms, and the extension bases (1) of each of the leveling outrigger mechanisms are directly or indirectly fixed to the frames of the corresponding crawler traveling mechanisms.

8. The crawler crane of claim 7, wherein, Each of the crawler traveling mechanisms comprises two crawlers arranged side by side, each of the crawler traveling mechanisms comprises a respective independent frame, and the two crawlers of each of the crawler traveling mechanisms are connected through the respective frame.

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