CN117819415A - Work machine support device and work machine - Google Patents

Abstract

The present invention provides a support device for a working machine and a working machine, wherein the support device for a working machine comprises: the fixed support leg box is arranged on a chassis of the working machine and is provided with a connecting seat and a guide channel, the extending direction of which is inclined relative to the chassis, and one side of the guide channel is opened towards the connecting seat; the movable supporting leg is in sliding fit with the guide channel and comprises an upper bending plate and a lower bending plate which are in welding fit to form a hollow cylindrical supporting leg structure; a telescopic oil cylinder is arranged between the connecting seat and the movable supporting leg, and at least one part of the telescopic oil cylinder is positioned in the movable supporting leg. According to the invention, a working machine supporting scheme which is simple in structure, small in occupied space during expansion and contraction and low in cost is realized.

Description

Work machine support device and work machine

Technical Field

The present disclosure relates to work machines, and particularly to a support device for a work machine and a work machine.

Background

The structural design of the telescopic support leg is important to improving equipment stability of part of working machines in static load working.

Taking a crane as an example, the telescopic support leg is mainly used for increasing the area of a base, adjusting the gradient of a working site and improving the anti-overturning stability, so that the lifting capacity is enhanced. During the hoisting process, the supporting legs can extend outwards to increase the moment of the bearing surface; while traveling, the legs are retracted to reduce the overall size and improve the passability.

Although the conventional H-shaped horizontal telescopic legs or frog-leg type crank arm telescopic legs are powerful, the legs require a large space to extend and work due to their complex structural design. This limits their use in narrow environments such as ports, shelves, pipelines, etc.

Disclosure of Invention

The invention provides a supporting device of a working machine and the working machine, which are used for solving the defect of larger space requirement caused by complex telescopic supporting leg structure in the prior art and realizing a working machine supporting scheme with simple structure, small occupied space during telescopic and lower cost.

The present invention provides a support device for a working machine, comprising: the fixed support leg box is arranged on a chassis of the working machine and is provided with a connecting seat and a guide channel, the extending direction of which is inclined relative to the chassis, and one side of the guide channel is opened towards the connecting seat; the movable supporting leg is in sliding fit with the guide channel and comprises an upper bending plate and a lower bending plate, and the upper bending plate and the lower bending plate enclose a hollow cylindrical supporting leg structure; the telescopic oil cylinder is arranged between the connecting seat and the movable supporting leg, and at least one part of the telescopic oil cylinder is positioned in the movable supporting leg to realize the telescopic action of the movable supporting leg.

According to the supporting device of the working machine, the movable supporting leg is provided with the pin shaft which radially penetrates through the upper bending plate and/or the lower bending plate; one end of the telescopic oil cylinder is hinged to the connecting seat, and the other end of the telescopic oil cylinder is hinged to the pin shaft.

According to the supporting device of the working machine, the tail end of the movable supporting leg far away from the connecting seat is provided with the supporting leg disc; the support leg plate is provided with a hinge plate which is in hinged fit with the pin shaft.

According to the support device of the working machine, the end face of the tail end of the movable supporting leg is parallel to the chassis; the distance between the pin shaft and the end face of the tail end is smaller than or equal to the distance between the pin shaft and the support leg disc.

According to the support device of the working machine provided by the invention, the upper bending plate is provided with a first flanging part facing the lower bending plate, and the lower bending plate is provided with a second flanging part facing the upper bending plate; the first folded edge part is in welding fit with the second folded edge part, so that the upper bent plate and the lower bent plate enclose a hollow cylindrical supporting leg structure with a round corner rectangle cross section.

According to the supporting device of the working machine, provided by the invention, the cylinder barrel of the telescopic oil cylinder is connected with the connecting seat, and the oil way inlet and the oil way outlet of the telescopic oil cylinder are both positioned outside the guide channel; the lower bending plate comprises an extension part which is longer than the upper bending plate in the length direction of the movable supporting leg; and an avoidance gap is formed between the extension part and the upper bending plate when the movable supporting leg is close to the head end of the connecting seat.

According to the supporting device of the working machine, the fixed leg box is provided with the dustproof bin; the connecting seat is arranged in the dustproof bin; the guide channel extends towards one end of the connecting seat to the inside of the dustproof bin.

According to the support device of the working machine provided by the invention, a support structure is arranged in the fixed leg box, and the support structure comprises: the support block is fixed on the fixed leg box and is arranged at an adjacent position of the guide channel, which is opposite to the opening at one side of the connecting seat; and/or a support plate mounted between the inner wall of the fixed leg box and the guide passage.

According to the supporting device of the working machine, one of the guide channel and the movable supporting leg is provided with a lock hole structure, and the other is provided with a movable lock pin matched with the lock hole structure.

The invention also provides a working machine, comprising the supporting device of the working machine.

According to the support device of the working machine and the working machine, the movable supporting leg of the support device is formed by welding the upper bending plate and the lower bending plate, so that a hollow cylindrical supporting leg structure is formed, the supporting leg structure is greatly simplified, and the manufacturing difficulty and cost are reduced. The guide channel is arranged in the fixed leg box and is inclined relative to the chassis, so that the movable leg can slide along the guide channel in the telescopic process and obliquely contact the ground, and the space required in the unfolding process is smaller. The telescopic oil cylinder part is arranged in the movable supporting leg, so that the oil cylinder can be protected from the external environment, and the cost of an additional protecting device can be saved. Thus, the support device of a work machine according to the present invention provides a more practical and economical work machine support solution by simplifying the structure, reducing space requirements and reducing costs.

Drawings

In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of one of the configurations of a support device for a work machine provided by the present disclosure;

FIG. 2 is a second schematic view of a support device for a work machine according to the present invention;

FIG. 3 is a schematic view of the structure of the movable leg of the supporting device according to the present invention;

FIG. 4 is a schematic cross-sectional view of a movable leg;

FIG. 5 is a schematic cross-sectional view of a movable leg;

FIG. 6 is a schematic view of the structure of the upper curved plate of the movable leg;

FIG. 7 is a schematic view of the structure of a lower curved plate of a wave straight leg;

FIG. 8 is a schematic view of the construction of the foot plate of the movable leg;

FIG. 9 is a third schematic view of a support device for a work machine according to the present disclosure;

reference numerals:

100. fixing the supporting leg box; 101. a support block; 102. a support plate; 110. a connecting seat; 120. a guide channel; 121. a keyhole structure; 122. a movable lock pin; 130. a telescopic oil cylinder; 140. a dust-proof bin; 200. a movable support leg; 210. an upper bending plate; 211. a first folded edge portion; 220. a lower bending plate; 221. a second flange portion; 222. an extension; 230. a pin shaft; 240. a foot plate; 241. and (5) a hinged plate.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. It should also be noted that in the description of the present invention, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.

Embodiments of the support device for a work machine according to the present invention are described below with reference to fig. 1-8.

As shown in fig. 1 and 2, the present invention provides a support device for a working machine, which includes a fixed leg box 100, a movable leg 200, and a telescopic cylinder 130. The fixed leg box 100 is mounted on a chassis of the working machine, the fixed leg box 100 is provided with a connecting seat 110 and a guide channel 120, the extending direction of which is inclined relative to the chassis, and one side of the guide channel 120 is opened towards the connecting seat 110; the movable supporting leg 200 is in sliding fit with the guide channel 120, the movable supporting leg 200 comprises an upper bending plate 210 and a lower bending plate 220, and the upper bending plate 210 and the lower bending plate 220 enclose a hollow cylindrical supporting leg structure; the telescopic oil cylinder 130 is arranged between the connecting seat 110 and the movable supporting leg 200, and is driven by a hydraulic system to realize telescopic action of the movable supporting leg 200, and at least one part of the telescopic oil cylinder 130 is positioned in the movable supporting leg 200.

The movable support leg 200 is arranged in the fixed support leg box 100 through the guide channel 120 and is inclined relative to the chassis, so that the movable support leg 200 can slide along the guide channel 120 in the telescopic process and obliquely contact the ground, and the space required by the supporting device in the unfolding process is small, and the movable support leg can be flexibly applied to narrow environments such as ports, shelves, production lines and the like.

Specifically, the fixed leg box 100 is a base structure on the work machine chassis that provides points of attachment and fixed locations for other components. In the fixed leg box 100, a connection seat 110 is provided as a connection member between the movable leg 200 and the fixed leg box 100. In order to facilitate the movable leg 200 to slide obliquely toward the ground, a guide passage 120 is provided in the fixed leg box 100, which extends obliquely with respect to the chassis.

The movable leg 200 is slidably fitted in the guide passage 120. The movable leg 200 may at least include the following two structural forms: the movable leg 200 may be formed by welding an upper bent plate 210 and a lower bent plate 220 to form a hollow cylindrical leg structure; alternatively, the upper and lower curved plates 210 and 220 of the movable leg 200 may be an integrally formed structure. Regardless of the form of construction, the movable leg 200 emphasizes functionality and durability, and is intended to provide stable and strong support properties by being a slip fit within the guide channel 120, as well as employing an upper and lower curved plates 210, 220 in an integrated form.

In order to maintain the overall appearance clean and reduce the impact of the external environment on the ram, at least a portion of the telescoping ram 130 is hidden inside the movable leg 200. The design not only improves the stability and reliability of the working machine, but also makes the operation simpler and more convenient. The fixed leg box 100, the connecting seat 110, the guide channel 120, the movable leg 200 and the telescopic cylinder 130 together form a high-efficiency and stable supporting device, and strong supporting capability is provided for the working machine.

The above-described telescopic leg structure formed of the movable legs 200, the guide channels 120 and the telescopic cylinders 130 may be provided with a plurality of groups on the fixed leg box 100 to enable the plurality of movable legs 200 to form supports in different directions in use. As shown in fig. 1 and 2, the telescopic leg structure formed by the movable leg 200, the guide passage 120 and the telescopic cylinder 130 is preferably two groups, and the telescopic cylinders 130 of the two groups of telescopic leg structures may share one connection base 110. The two sets of telescopic leg structures are symmetrically distributed relative to the connecting seat 110, so that a splayed leg structure is formed.

According to a supporting device of a working machine provided by the present invention, as shown in fig. 3 and 4, a movable leg 200 is provided with a pin 230 passing radially through an upper bent plate 210 and/or a lower bent plate 220. One end of the telescopic cylinder 130 is hinged to the connection base 110, and the other end is hinged to the pin 230. Specifically, as shown in fig. 1 and 2, one end of the telescopic cylinder 130 is connected to the connection base 110 in a hinged manner, so that the telescopic cylinder 130 has a certain swing margin with respect to the connection base 110, thereby preventing the telescopic cylinder 130 from being deformed by a radial force to cause deformation of a cylinder rod or other parts. The other end of the telescopic cylinder 130 is hinged to a pin 230 in the movable leg 200, so that when the cylinder stretches, the cylinder drives the movable leg 200 to slide along the guide channel 120 through the pin 230, and the expansion and contraction of the legs are realized. It will be appreciated that the pin 230 may be replaced with other radial structures mounted to the movable leg 200 for use as a connection basis for the telescopic ram 130.

The movable leg 200 may be directly supported on the ground through the end of the movable leg 200 (i.e., the end far from the fixed leg box 100 and the connection base 110) in the extended state, or a structure for contacting the ground may be provided at the end of the movable leg 200.

Preferably, as shown in fig. 1, 2, 3 and 4, according to the support device for a working machine provided by the present invention, the end of the movable leg 200, which is far away from the connection base 110, is provided with a leg plate 240. As shown in FIG. 8, the support plate 240 is provided with a hinge plate 241, the hinge plate 241 being hingedly coupled to the pin 230, preferably the hinge plate 241 being perpendicular to the support plate 240. Specifically, at the end of the movable leg 200, a foothold 240 is installed as a portion of the supporting means that is in direct contact with the ground, which functions to provide stable support and distribute the load. The hinge plate 241 of the leg plate 240 is connected to the pin shaft 230 in a hinge manner so that the hinge plate 241 can rotate around the pin shaft 230 by a certain angle, so that the leg plate 240 can adapt to uneven ground and maintain the stability of the working machine.

Further, according to the supporting device of the working machine provided by the invention, the end surface of the tail end of the movable supporting leg 200 is parallel to the chassis; the distance between the pin 230 and the end face of the end is less than or equal to the distance between the pin 230 and the support plate 240. Specifically, the end surfaces of the distal ends of the movable leg 200 are surrounded by the ends of the upper and lower bent plates 210 and 220 that are remote from the fixed leg box 100 and the connection base 110. The end surface is inclined in a downward direction with respect to the extending direction of the movable leg 200 so that the end surface is parallel to the chassis, and thus when the movable leg 200 is fully extended, the end surface is parallel to the chassis of the work machine, thereby ensuring that the support device can provide uniform and stable support when in operation. The distance between the pin shaft 230 and the end surface of the end is smaller than or equal to the distance between the pin shaft 230 and the support leg disc 240, that is, a certain gap is formed between the support leg disc 240 and the end surface of the end of the movable support leg 200, so that the support leg disc 240 can have a certain swinging margin around the pin shaft 230 when contacting the ground, and the adaptability of the supporting device to rugged or inclined ground is improved.

The cross-sectional shape of the movable leg 200 can have various designs according to the structure and the load bearing requirement, and the specific cross-sectional shape can be adjusted and designed according to the actual requirement so as to meet different mechanical structure requirements and load bearing requirements. Preferably, the movable supporting leg 200 has a polygonal (e.g., square, rectangular, hexagonal, etc.) or a cross-sectional shape close to a polygon, so that the movable supporting leg 200 can be limited by a certain rotation angle when sliding in the guiding channel 120, which helps to improve stability of the supporting device and prevent the supporting leg from being unstable due to excessive rotation during the telescoping process.

As shown in fig. 2 and 5, according to the support device for a working machine provided by the present invention, the cross-sectional shapes of the movable leg 200 and the guide passage 120 are preferably rectangular or rounded rectangular. In particular, the rectangular cross-section movable leg 200 is relatively simple and easy to manufacture, with good rigidity and load carrying capability. The rounded rectangle reduces stress concentration through the rounded design while maintaining the advantages of the rectangle, and improves the durability of the structure. This combination of shapes not only facilitates manufacturing and installation, but also ensures smooth sliding of the movable leg 200 within the guide channel 120 and provides stable support.

Further, according to the supporting device of the working machine provided by the invention, the upper bending plate 210 is provided with a first flanging part 211 facing the lower bending plate 220, and the lower bending plate 220 is provided with a second flanging part 221 facing the upper bending plate 210; the first flange portion 211 is welded to the second flange portion 221, so that the upper bending plate 210 and the lower bending plate 220 enclose a hollow cylindrical leg structure. Specifically, the present example realizes the rounded rectangular cross-sectional shape of the movable leg 200 in the above-described embodiment by the first hemmed portion 211 of the upper bent plate 210 and the second hemmed portion 221 of the lower bent plate 220 with a welding fit.

As shown in fig. 5, 6 and 7, the first flange 211 refers to a bent portion of the upper bending plate 210 facing downward, and the second flange 221 refers to a bent portion of the lower bending plate 220 facing upward, and the first flange 211 is welded with the second flange 221, so that the upper bending plate 210 and the lower bending plate 220 enclose a hollow cylindrical leg structure with a rounded rectangular cross section. The upper and lower curved plates 210 and 220 are integrally connected by welding, realizing a movable leg 200 having high overall rigidity and bending resistance.

According to the supporting device for the working machine provided by the invention, as shown in fig. 1 and 2, the cylinder barrel of the telescopic cylinder 130 is connected to the connecting seat 110, and the oil path inlet and the oil path outlet of the telescopic cylinder 130 are both positioned outside the guide channel 120. Specifically, the present embodiment provides an embodiment in which the oil passage inlet and the oil passage outlet of the telescopic cylinder 130 are provided at a side close to the fixed leg box 100 and outside the guide passage 120.

The interface between the oil system and the telescopic cylinder 130 (i.e., the oil inlet and the oil outlet) is not located inside the guide passage 120, but outside the guide passage 120, so that the oil design is simpler, and it is not necessary to consider how the oil pipe passes through the narrow guide passage 120. The oil path inlet and the oil path outlet are provided at a position closer to the fixed leg box 100 and are both outside the guide passage 120, thereby providing a sufficient layout space for the arrangement of the oil path system, facilitating maintenance and repair. The cylinder barrel of the telescopic oil cylinder 130 is connected to the connecting seat 110, so that the oil way inlet and the oil way outlet can be basically kept static when the telescopic oil cylinder 130 works, and the design difficulty of the oil way is reduced. Since the oil path of the telescopic oil cylinder 130 is not affected by the action of the telescopic oil cylinder 130, the risk of failure due to the force or vibration of the oil path is reduced.

According to the supporting device of the working machine provided by the present invention, as shown in fig. 3 and 4, the lower bent plate 220 includes an extension 222 longer than the upper bent plate 210 in the length direction of the movable leg 200; at the front end of the movable leg 200 near the connecting seat 110, an avoidance gap is formed between the extension 222 and the upper bending plate 210. As shown in fig. 1, in the recovery state of the movable leg 200, the avoidance notch prevents the movable leg 200 from interfering with the oil path inlet and the oil path outlet of the telescopic cylinder 130; as shown in fig. 2, in the extended state of the movable leg 200, the extension 222 can increase the range of the sliding fit structure between the movable leg 200 and the guide channel 120, and improve the radial stress strength between the movable leg 200 and the guide channel 120.

Specifically, the extension 222 of the lower curved plate 220 is longer in the length direction of the movable leg 200 relative to the upper curved plate 210, which not only provides additional structural strength and support area, but also forms the aforementioned relief notch. The purpose of avoiding the gap is to avoid the movable leg 200 from interfering with the oil path inlet and the oil path outlet of the telescopic oil cylinder 130 in the recovery state. When the movable supporting leg 200 is retracted, the movable supporting leg 200 cannot influence the positions of the oil way inlet and the oil way outlet due to the existence of the avoidance notch, so that the possible interference problem is avoided. When the movable leg 200 is extended, the extension 222 may provide a larger contact area, making the sliding fit between the movable leg 200 and the guide channel 120 more stable, while increasing the radial force-bearing capacity between the movable leg 200 and the guide channel 120. By the design of the extension 222 and the avoidance gap, stability of the movable leg 200 during telescoping is improved and risk of interference between components is reduced.

As shown in fig. 1 and 2, according to the support device for a working machine provided by the present invention, the fixed leg box 100 is preferably provided with a dust-proof bin 140. The connecting seat 110 in the above embodiment is disposed in the dust-proof bin 140, and the guide channel 120 extends into the dust-proof bin 140 toward one end of the connecting seat 110, so as to prevent external impurities from invading into the telescopic cylinder 130 and the oil path system.

Specifically, the dust bin 140 is provided in the fixed leg box 100 as a compartment or space for preventing dust and other foreign substances from entering, and the external environment can be effectively isolated by the dust bin 140, thereby protecting the internal components of the supporting device. The connection block 110 is placed inside the dust bin 140, and a portion of the guide channel 120 is also located in the dust bin 140. Such an arrangement helps to ensure cleanliness of the telescopic ram 130 and the oil system. By placing the connection block 110 and a portion of the guide channel 120 inside the dust bin 140, the chance of dust and other impurities entering the telescopic ram 130 and the oil system can be significantly reduced. This helps to keep the oil circuit system clean, reduces the risk of failure due to contamination, and improves the overall performance and life of the device.

As shown in fig. 9, according to the supporting device for a working machine provided by the present invention, a supporting structure is provided in a fixed leg box 100, and the supporting structure includes: the supporting block 101 is fixed on the fixed leg box 100, and the supporting block 101 is arranged at an adjacent position of the opening of one side of the guide channel 120, which is opposite to the connecting seat 110; and/or a support plate 102, the support plate 102 being installed between the inner wall of the fixed leg box 100 and the guide channel 120. Specifically, the work machine support device of the present invention is capable of effectively resisting a work load by a support structure design, protecting the fixed leg box 100 and the guide passage 120 from deformation or damage, thereby ensuring mechanical stability and durability.

Wherein, the supporting block 101 is fixed in the fixed leg box 100 and is positioned adjacent to the opening of the side of the guide channel 120 facing away from the connecting seat 110. Preferably, two support blocks 101 are provided at upper and lower sides of the guide channel 120, respectively. Its main function is to bear the working load when the movable leg 200 is operated, so as to prevent the mouth of the guide channel 120 from being deformed or damaged under the load. The support blocks 101 may be triangular, trapezoidal, quadrilateral or other shapes depending on the particular work load distribution and structural design of the fixed leg box 100.

On the other hand, the support plate 102 is installed between the inner wall of the fixed leg case 100 and the guide channel 120, and is mainly used to prevent torsional deformation of the fixed leg case 100 during production and operation, thereby causing torsional deformation of the guide channel 120. Preferably, two support plates 102 are provided on both upper and lower sides of the guide passage 120, respectively, to form a reliable support between the guide passage 120 and the fixed leg box 100. The design shape of the support plate 102 may be adjusted depending on the particular workload distribution and crane body frame configuration, and alternative forms include parallel plates, I-shapes, chevrons, T-shapes, cross shapes, or other shapes.

According to the supporting device of the working machine provided by the invention, one of the guide channel 120 and the movable supporting leg 200 is provided with a lock hole structure 121, and the other is provided with a movable lock pin 122 matched with the lock hole structure 121. Specifically, the present embodiment can form a mechanical lock between the guide channel 120 and the movable leg 200 by the lock hole structure 121 and the movable lock pin 122, and thus can prevent dangerous situations such as sliding or falling out from occurring in the retracted state of the leg in assembly maintenance, transportation transition, etc.

As shown in fig. 6, the locking hole structure 121 is preferably provided on the upper bent plate 210, and further, two locking hole structures 121 are preferably provided on the upper bent plate 210, and the distance between the two locking hole structures 121 is equal to the driving stroke of the telescopic cylinder 130. According to the preferred embodiment, the mechanical locking between the guide channel 120 and the movable leg 200 can be achieved by locking the two lock hole structures 121 by the movable lock pin 122 in both the extended and retracted states of the movable leg 200, respectively, improving the reliability of the supporting device.

The invention also provides a working machine, comprising the support device of any one of the working machines. The support device of the working machine can be applied to various working machines. For example, under the action of the telescopic support legs, the aerial working platform can complete wider work tasks on the premise of ensuring safety and stability. In addition, some construction machines such as excavators and forklift trucks, and some types of agricultural machines such as tractors, may also employ telescoping leg designs to accommodate changing work environments and to increase work efficiency.

Preferably, the working machine may be a crane, and when the working machine needs to be lifted, the movable supporting leg 200 extends outwards to increase the moment of the bearing surface; while driving, the movable leg 200 is retracted, so that the external dimension is reduced and the driving passing property is improved.

According to a preferred embodiment of the present invention, the fixed leg box 100 of the supporting means of the working machine is mounted on the crane chassis and provided with a connection seat 110 and a guide channel 120. The guide channel 120 is inclined with respect to the chassis with one side opening toward the connection base 110. The movable leg 200 is slidably fitted in the guide channel 120, and the movable leg 200 is formed by welding an upper bent plate 210 and a lower bent plate 220 to form a hollow cylindrical structure. The connecting seat 110 is connected with the movable supporting leg 200 through the telescopic oil cylinder 130, and at least a part of the telescopic oil cylinder 130 is positioned inside the movable supporting leg 200. The movable leg 200 is provided with a leg plate 240 at the end, and the leg plate 240 is provided with a hinge plate 241 perpendicular to the surface thereof, which is hinged with the pin shaft 230. The end surface of the tail end of the movable supporting leg 200 is parallel to the chassis, and the distance between the pin shaft 230 and the end surface of the tail end is smaller than or equal to the distance between the pin shaft 230 and the supporting leg plate 240. The movable leg 200 and the guide passage 120 have rectangular or rounded rectangular cross-sectional shapes to ensure stability and to facilitate manufacturing. The upper bending plate 210 has a first flange portion 211 facing the lower bending plate 220, and the lower bending plate 220 has a second flange portion 221 facing the upper bending plate 210, and the two portions are welded together to form a hollow cylindrical structure. The cylinder barrel of the telescopic cylinder 130 is connected to the connecting seat 110, and the oil inlet and the oil outlet are both located outside the guide channel 120, so that maintenance and interference prevention are facilitated. The lower bending plate 220 is longer than the upper bending plate 210, and an avoidance gap is formed between the extension part 222 and the upper bending plate 210, so that the movable supporting leg 200 is prevented from interfering with an oil way inlet and an oil way outlet of the telescopic oil cylinder 130. The dustproof bin 140 is arranged in the fixed leg box 100, the connecting seat 110 is arranged in the dustproof bin 140, the guide channel 120 extends into the dustproof bin 140 towards one end of the connecting seat 110, and external impurities are effectively prevented from entering the telescopic oil cylinder 130 and the oil circuit system.

The supporting device of the working machine has the advantages of ingenious design, simple structure, small occupied space and low cost, is suitable for supporting operation under various terrain conditions, provides stable support for the working machine such as a crane, and improves the working efficiency and the safety.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "manner," "particular modes," or "some modes," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or mode is included in at least one embodiment or mode of the embodiments of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or manner. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or ways. Furthermore, various embodiments or modes and features of various embodiments or modes described in this specification can be combined and combined by those skilled in the art without mutual conflict.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A support device for a work machine, comprising:

a fixed leg box (100) mounted on a chassis of a working machine, the fixed leg box (100) being provided with a connecting seat (110) and a guide channel (120) extending in a direction inclined relative to the chassis, one side opening of the guide channel (120) facing the connecting seat (110);

the movable supporting leg (200) is in sliding fit with the guide channel (120), the movable supporting leg (200) comprises an upper bending plate (210) and a lower bending plate (220), and the upper bending plate (210) and the lower bending plate (220) enclose a hollow cylindrical supporting leg structure;

the telescopic oil cylinder (130) is arranged between the connecting seat (110) and the movable supporting leg (200), and at least one part of the telescopic oil cylinder (130) is positioned in the movable supporting leg (200) to realize telescopic action of the movable supporting leg (200).

2. A support device for a work machine according to claim 1, characterized in that the movable leg (200) is provided with a pin (230) passing radially through the upper bending plate (210) and/or the lower bending plate (220);

one end of the telescopic oil cylinder (130) is hinged to the connecting seat (110), and the other end of the telescopic oil cylinder is hinged to the pin shaft (230).

3. The support device of a work machine according to claim 2, characterized in that the end of the movable leg (200) remote from the connection seat (110) is provided with a leg disc (240);

the support leg plate (240) is provided with a hinge plate (241), and the hinge plate (241) is in hinged fit with the pin shaft (230).

4. A support device for a work machine according to claim 3, characterized in that the end face of the tip of the movable leg (200) is parallel to the chassis;

the distance between the pin shaft (230) and the end face of the tail end is smaller than or equal to the distance between the pin shaft (230) and the support leg disc (240).

5. The work machine support device according to claim 1, characterized in that the upper bending plate (210) has a first flange portion (211) facing the lower bending plate (220), the lower bending plate (220) having a second flange portion (221) facing the upper bending plate (210);

the first flange part (211) is in welding fit with the second flange part (221), so that the upper bending plate (210) and the lower bending plate (220) enclose a hollow cylindrical supporting leg structure with a round corner rectangle cross section.

6. The support device of a working machine according to claim 1, characterized in that the cylinder barrel of the telescopic cylinder (130) is connected to the connection seat (110), the oil inlet and the oil outlet of the telescopic cylinder (130) being both located outside the guide channel (120);

the lower bent plate (220) includes an extension (222) longer than the upper bent plate (210) in a length direction of the movable leg (200);

and an avoidance gap is formed between the extension part (222) and the upper bending plate (210) at the head end of the movable supporting leg (200) close to the connecting seat (110).

7. The support device of a work machine according to any of the claims 1-6, characterized in that the fixed leg box (100) is provided with a dust bin (140);

the connecting seat (110) is arranged in the dustproof bin (140);

one end of the guide channel (120) facing the connecting seat (110) extends into the dustproof bin (140).

8. The support device of a work machine according to any of the claims 1-6, characterized in that a support structure is provided in the fixed leg box (100), the support structure comprising:

the support block (101) is fixed on the fixed leg box (100), and the support block (101) is arranged at an adjacent position of the guide channel (120) which is opposite to the opening at one side of the connecting seat (110);

and/or a support plate (102), the support plate (102) being mounted between an inner wall of the fixed leg box (100) and the guide channel (120).

9. A support device for a working machine according to any one of claims 1-6, characterized in that one of the guide channel (120) and the movable leg (200) is provided with a lock hole structure (121), the other one being provided with a movable lock pin (122) matching the lock hole structure (121).

10. A work machine comprising a support device for a work machine according to any one of claims 1-9.