Landing leg device and engineering machinery

Abstract

The utility model relates to the technical field of engineering machinery, and discloses a supporting leg device and engineering machinery. The supporting leg device comprises a supporting leg frame; the supporting leg component comprises a supporting leg arm, a supporting leg seat and a supporting leg driving piece, the supporting leg arm is hinged to the supporting leg frame, the supporting leg seat is hinged to the supporting leg arm, the supporting leg driving piece is hinged to the supporting leg frame and hinged to the supporting leg arm, the supporting leg arm is provided with a retracting position and an unfolding position, and the supporting leg seat is provided with a locking part; one side of the protective cover is hinged to the supporting leg frame, and the protective cover can swing along with swinging of the supporting leg arm; the supporting leg seat has a locking state that the locking part locks the other side of the protective cover when the supporting leg arm swings to the retracting position and an unlocking state that the locking part unlocks the protective cover when the supporting leg arm is unfolded, and the other side of the protective cover and the locking part are locked and matched to form a mechanical self-locking structure. When the supporting leg arm swings to the retracting position, the locking part of the supporting leg seat locks the other side of the protective cover, the protective cover is not prone to overturning even if being interfered by external force, reliability is high, and the service life is long.

Description

Technical Field

[0001] The utility model relates to the technical field of construction machinery, in particular to a outrigger device and construction machinery. Background Technique

[0002] As one of the most important mechanical equipment in engineering construction, various excavators are widely used. Among them, the wheeled excavator has the characteristics of good mobility, convenient short-distance transfer operation and not easy to damage the road surface, etc., and has obvious advantages in municipal maintenance, highway traffic construction, etc., and has great market potential. However, since the wheeled excavator will cause an increase in the load of the tires and axles during the excavation operation, the reliability of the whole machine is reduced. In addition, the wheelbase of the wheeled excavator is relatively narrow, and the stability is poor when the excavating arm rotates. Therefore, most current wheeled excavators are equipped with a bulldozing blade and outrigger components on both sides of the front and rear of the wheels to improve the reliability and stability during the load operation.

[0003] For the outrigger component, it relies on the oil cylinder to drive the outrigger arm to rotate around the frame hinge point, thereby realizing the reciprocating movement of supporting the vehicle and retracting. If the outrigger component is not protected in the working state, on the one hand, stones, hard foreign objects, etc. generated during the excavation process are likely to fall into the frame cavity where the outrigger oil cylinder is located, causing impact damage to the piston rod of the outrigger oil cylinder, and the working reliability and stability of the whole machine will be reduced accordingly; on the other hand, if stones and hard foreign objects fall into the gap between the outrigger arm and the frame, it is easy to cause the outrigger to jam and unable to realize the reciprocating movement of supporting the vehicle and retracting, and manual cleaning is required, which is time-consuming and laborious.

[0004] Therefore, it is extremely important for the outrigger component to take necessary protective measures to improve the reliability and stability of the whole machine operation and ensure the smoothness of the outrigger component operation. At present, the common protective measures are mainly the following two types:

[0005] The first type is that a guard plate is fixedly connected to one end of the piston rod head of the outrigger oil cylinder. The guard plate can protect the piston rod exposed outside the cylinder body as the oil cylinder expands and contracts. This protection method only protects the oil cylinder, ignoring the protection of the inside of the frame cavity where the oil cylinder is located, and there is a problem of insufficient protection. When falling stones and hard foreign objects fall into the cavity, it is easy to cause problems such as rotation jamming.

[0006] The second type is that a protective cover is provided on the upper side of the frame cavity where the oil cylinder is located, which can protect the oil cylinder and the space of the frame cavity. A reset component is provided in the protective cover. Whether the outrigger is in the vehicle-supporting state or the retracted state, the reset component can always keep the protective cover close to the outrigger arm, preventing the protective cover from crossing the tipping boundary, and thus playing a full-course protection role. This protection method provides comprehensive protection. However, the reset component is an elastic element such as a spring or a torsion spring. After long-term use, it is likely to fail due to the decrease in spring rigidity. If the outrigger is retracted to the highest position at this time, the protective cover is extremely likely to cross the tipping boundary and fall into the tipping area under the action of external force due to insufficient elastic force provided by the spring, and the protective function of the outrigger during the reciprocating movement of vehicle-supporting and retracting cannot be realized anymore, resulting in low reliability of the protection structure and difficulty in long-term use. Among them, when the angle formed by the connection line between the rotation center of the protective cover and its center of mass and the ground exceeds 90°, the protective cover falls into the tipping area. Utility Model Content

[0007] In view of this, the present utility model provides an outrigger device and a construction machinery to solve the problem that the reliability of the protection structure is low and it is difficult to use for a long time due to the failure of the elastic element when the protective cover is closely attached to the outrigger arm through the elastic element.

[0008] In a first aspect, the present utility model provides an outrigger device, including: an outrigger frame; an outrigger component, including an outrigger arm, an outrigger seat, and an outrigger driving member. The outrigger arm is hinged to the outrigger frame, the outrigger seat is hinged to the outrigger arm, one end of the outrigger driving member is hinged to the outrigger frame, the other end of the outrigger driving member is hinged to the outrigger arm, the outrigger arm has a retracted position and a deployed position, and the outrigger seat has a locking portion; a protective cover, one side of which is hinged to the outrigger frame, and the protective cover can swing with the swing of the outrigger arm; wherein, the outrigger seat has a locking state in which the locking portion locks the other side of the protective cover when the outrigger arm swings to the retracted position and an unlocking state in which the locking portion unlocks the protective cover when the outrigger arm is deployed. The other side of the protective cover and the locking portion are locked and cooperated to form a mechanical self-locking structure to prevent the protective cover from tipping over.

[0009] Beneficial effects: During the process of the outrigger driving member driving the outrigger arm to switch from the deployed position to the retracted position, the protective cover swings along with the swing of the outrigger arm. After the outrigger arm swings by a certain angle, the outrigger base swings under the action of its own gravity. When the outrigger arm swings to the retracted position, the locking portion of the outrigger base locks the other side of the protective cover. Even if the protective cover is interfered by an external force, it is not easy to overturn, providing comprehensive and reliable protection. The protective cover can closely adhere to the outrigger arm without the assistance of a reset element such as a spring, realizing the self-locking of the protective cover. The mechanical self-locking structure has high reliability and a long service life, effectively solving the problem that when the protective cover closely adheres to the outrigger arm through an elastic element, the elastic element fails, resulting in low reliability of the protection structure and difficulty in long-term use. When the outrigger driving member drives the outrigger arm to switch from the retracted position to the deployed position, along with the swing of the outrigger arm, the locking portion can unlock the protective cover, and the outrigger arm continues to swing. The protective cover swings under the action of its own gravity. The protective cover can protect the outrigger driving member and the cavity in the outrigger frame where it is located, so that while the outrigger driving member is effectively protected, sand, foreign objects are also difficult to enter the outrigger slewing part, avoiding damage to the outrigger driving member and jamming when the outrigger arm retracts.

[0010] In an optional embodiment, the protective cover includes a cover body and a mating structure. The mating structure is arranged on the cover body, and the mating structure and the locking portion are locked and matched to form a mechanical self-locking structure.

[0011] Beneficial effects: A mating structure cooperating with the locking portion is arranged on the cover body, which has a simple structure and is easy to implement.

[0012] In an optional embodiment, the mating structure includes a slide bar, the locking portion is a locking groove, and the outrigger base further has a sliding surface connected to the locking groove. The slide bar can be slidably matched with the sliding surface.

[0013] Beneficial effects: When the outrigger arm retracts to the topmost position, the cooperation between the slide bar and the locking groove can realize the self-locking of the protective cover, preventing the protective cover from tipping over onto the outrigger frame due to external force when the outrigger arm retracts to the topmost position, resulting in the inability to realize reciprocating rotary protection following the outrigger arm. The protective cover has high reliability and a long service life.

[0014] In an optional embodiment, when the outrigger base is in the locked state, the included angle between the connection line of the rotation center of the protective cover and the center of the slide bar and the horizontal plane is A, and 58° ≤ A ≤ 68°.

[0015] Beneficial effects: By setting A within a reasonable range, the self-locking of the protective cover can be realized, effectively preventing the situation where the included angle A is too small or too large to achieve self-locking.

[0016] In an alternative embodiment, the mating structure further includes a wear-resistant member provided on the cover body. The wear-resistant member is slidably engaged with the support leg arm. When the support leg arm is converted from the deployed position to the retracted position, the sliding engagement between the wear-resistant member and the support leg arm is changed to the sliding engagement between the sliding rod and the sliding surface, and then changed to the engagement between the sliding rod and the locking groove.

[0017] Advantageous effects: The wear-resistant member can reduce the wear and abnormal noise between the protective cover and the support leg arm during lapping and sliding.

[0018] In an alternative embodiment, the protective cover further includes a support member provided inside the cover body. The sliding rod is passed through the support member and the cover body, and the wear-resistant member is fixed on the support member.

[0019] Advantageous effects: On the one hand, the support member can provide positioning and support for the sliding rod. On the other hand, through the connection with the sliding rod, the strength of the protective cover is enhanced.

[0020] In an alternative embodiment, the wear-resistant member has a smooth surface that is slidably engaged with the support leg arm.

[0021] Advantageous effects: The wear-resistant member is designed with a smooth surface, which can reduce the sliding friction coefficient during its operation, improve wear resistance, and extend the service life.

[0022] In an alternative embodiment, the support leg base includes a bottom plate and two vertical plates. The two vertical plates are spaced apart on the bottom plate, and at least one vertical plate has a locking groove and a sliding surface.

[0023] Advantageous effects: By forming a locking groove and a sliding surface on one vertical plate, the structure is simple and convenient for processing and manufacturing. The support leg base uses a single vertical plate to lock the protective cover in the retracted state, reducing the probability of the problem that it is difficult for the sliding rod to match the locking groove of the vertical plate due to manufacturing errors during double-vertical-plate locking, and improving the reliability of the structure.

[0024] In an alternative embodiment, the support leg frame includes a frame body and a mounting plate fixed on the inner side of the frame body. One side of the protective cover is hinged to the mounting plate.

[0025] Advantageous effects: By hinging the mounting plate with the protective cover, it is convenient for installation and also facilitates the swinging of the protective cover.

[0026] In a second aspect, the present utility model further provides a construction machinery, including: the above-mentioned support leg device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0028] Figure 1 A perspective view of a leg device according to an embodiment of the present invention;

[0029] Figure 2 is Figure 1 The front view of the leg device shown;

[0030] Figure 3 is Figure 2 A partial schematic view of the leg device shown;

[0031] Figure 4 is Figure 1 The perspective view of the protective cover shown;

[0032] Figure 5 is Figure 1 The perspective view of the leg base shown.

[0033] Explanation of the reference numerals:

[0034] 1. Leg frame; 101. Frame body; 102. Mounting plate;

[0035] 2. Leg component; 201. Leg arm; 2011. First hinge shaft; 2012. Second hinge shaft; 202. Leg base; 2021. Bottom plate; 2022. Vertical plate; 2023. Lock groove; 2024. Sliding surface; 2025. Reinforcing plate; 2026. Reinforcing rib plate; 203. Leg drive member;

[0036] 3. Protective cover; 301. Cover body; 3011. Top plate; 3012. Side plate; 3013. Rotary connection hole; 3014. Slide bar connection hole; 302. Slide bar; 303. Wear-resistant member; 3031. Smooth surface; 304. Support member; 3041. Threaded hole; 305. Rotary sleeve; 306. Connection sleeve. Specific embodiments

[0037] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0038] The following will describe the embodiments of the present utility model in conjunction with Figures 1 to 5 , to describe the embodiments of the present utility model.

[0039] According to an embodiment of the present utility model, on the one hand, a leg device is provided, including: a leg frame 1, leg components 2 and a protective cover 3. The leg components 2 include a leg arm 201, a leg seat 202 and a leg drive member 203. The leg arm 201 is hinged to the leg frame 1, the leg seat 202 is hinged to the leg arm 201, one end of the leg drive member 203 is hinged to the leg frame 1, and the other end of the leg drive member 203 is hinged to the leg arm 201. The leg arm 201 has a retracted position and an extended position, and the leg seat 202 has a locking portion; one side of the protective cover 3 is hinged to the leg frame 1, and the protective cover 3 can swing with the swing of the leg arm 201; wherein, the leg seat 202 has a locked state in which the locking portion locks the other side of the protective cover 3 when the leg arm 201 swings to the retracted position and an unlocked state in which the locking portion unlocks the protective cover 3 when the leg arm 201 is extended. The other side of the protective cover 3 and the locking portion are locked and cooperated to form a mechanical self-locking structure to prevent the protective cover 3 from tipping over.

[0040] When the outrigger driving member 203 of the outrigger device of this embodiment drives the outrigger arm 201 to switch from the deployed position to the retracted position, the protective cover 3 swings along with the swing of the outrigger arm 201. After the outrigger arm 201 swings a certain angle, the outrigger base 202 swings under the action of its own gravity. When the outrigger arm 201 swings to the retracted position, the locking portion of the outrigger base 202 locks the other side of the protective cover 3. Even if the protective cover 3 is interfered by an external force, it is not easy to overturn, providing comprehensive and reliable protection. The protective cover 3 can closely adhere to the outrigger arm 201 without relying on a reset element such as a spring, realizing the self-locking of the protective cover 3. The mechanical self-locking structure has high reliability and a long service life, effectively solving the problem that when the protective cover closely adheres to the outrigger arm 201 through an elastic element, the elastic element fails, resulting in low reliability of the protection structure and difficulty in long-term use. When the outrigger driving member 203 drives the outrigger arm 201 to switch from the retracted position to the deployed position, along with the swing of the outrigger arm 201, the locking portion can unlock the protective cover 3, and the outrigger arm 201 continues to swing. The protective cover 3 swings under the action of its own gravity. The protective cover 3 can protect the outrigger driving member 203 and the cavity in the outrigger frame 1 where it is located, so that while the outrigger driving member 203 is effectively protected, sand, foreign objects are also difficult to enter the outrigger rotation part, avoiding damage to the outrigger driving member 203 and jamming when the outrigger arm 201 retracts.

[0041] Further, the outrigger driving member 203 is an outrigger oil cylinder. Using an outrigger oil cylinder to drive the outrigger arm 201 to switch between the deployed position and the retracted position, the outrigger oil cylinder has the advantages of simple structure, reliable operation, smooth movement, high-precision control, large load-bearing capacity, etc.

[0042] It should be noted that when the outrigger arm 201 is in the retracted position, the hinge joint between the outrigger arm 201 and the outrigger driving member 203 is located within the outrigger frame 1. When the outrigger arm 201 is in the deployed position, the outrigger base 202 supports on the ground.

[0043] In one embodiment, the protective cover 3 includes a cover body 301 and a mating structure. The mating structure is arranged on the cover body 301. The mating structure and the locking portion are locked and matched to form a mechanical self-locking structure. Setting a mating structure on the cover body 301 that cooperates with the locking portion is simple in structure and easy to implement.

[0044] It can be understood that in another embodiment, the mating structure may not be provided, and the mating structure is directly formed by the other side of the cover body 301.

[0045] In one embodiment, as Figure 4 and Figure 5As shown in the figure, the cooperation structure includes a sliding rod 302. The locking part is a locking groove 2023. The leg base 202 also has a sliding surface 2024 connected to the locking groove 2023. The sliding rod 302 can be slidably matched with the sliding surface 2024. When the leg arm 201 is retracted to the topmost position, the cooperation between the sliding rod 302 and the locking groove 2023 can achieve self-locking of the protective cover 3, preventing the protective cover 3 from tipping over onto the leg frame 1 due to external forces when it is retracted to the topmost position with the leg arm 201, thus ensuring that it can follow the leg arm 201 for reciprocating rotary protection. The reliability of the protective cover 3 is high and its service life is long.

[0046] Furthermore, the sliding rod 302 is made of round steel. It can be understood that the sliding rod 302 can be replaced with non-metallic materials instead of steel.

[0047] In one embodiment, as Figures 1 to 3 shown, when the leg base 202 is in the locked state, the included angle A between the connecting line of the rotation center of the protective cover 3 and the center of the sliding rod 302 and the horizontal plane satisfies 58° ≤ A ≤ 68°. By setting A within a reasonable range, self-locking of the protective cover 3 can be achieved, effectively preventing the situation where self-locking cannot be achieved due to the included angle A being too small or too large.

[0048] Furthermore, the included angle B between the connecting line of the rotation center of the protective cover 3 and its center of gravity and the horizontal plane is less than 70° and much less than 90°, which can ensure that the protective cover 3 is still affected by its own gravity and will not easily tip over onto the leg frame 1. Preferably, the included angle B = 68°.

[0049] When the leg arm 201 is in the retracted position and the protective cover 3 is subjected to an external force F 外 that will cause it to tip over, the protective cover 3 will continue to lift upward around the connecting sleeve 306. At this time, the external force F 外 can be converted into a force F perpendicular to the connecting line of the rotation center of the protective cover 3 and the center of the sliding rod 302 (F ≤ F 外 ). Since the sliding rod 302 is stuck in the locking groove 2023 of the leg base 202 at this time, when it is lifted to contact the upper edge of the locking groove 2023, the force received by the upper edge of the locking groove 2023 at this time is the component force F N of F. Since the extension line of the component force F N passes through the rotation center of the leg base 202, it cannot drive the leg base 202 to rotate. If the external force wants to break through the structural self-locking at this time, unless the sliding rod 302 is cut off or the locking groove 2023 is broken. The sliding rod 302 and the locking groove 2023 form mechanical self-locking in structure, making it have strong stability during the walking state.

[0050] In particular, it should be noted that the included angle A between the connection line of the rotation center of the protective cover 3 and the center of the sliding rod 302 and the horizontal plane is smaller than the included angle B, which can ensure the compactness of the self-locking structure design. When the included angle A is greater than B, self-locking can also be achieved, but it will increase the space structure occupied by the locking groove 2023 at the self-locking position, and the structure of the cover body 301 will also increase accordingly, resulting in an increased protective gap and a reduced protection comprehensiveness. The leg arm 201 has an edge corresponding to its hinge joint with the leg base 202. Due to the limitation of the leg arm 201, the included angle A cannot be too small. When the leg arm 201 is in the retracted position, the included angle A is at the minimum angle position when the sliding rod 302 contacts the edge of the leg arm 201.

[0051] In one embodiment, as Figure 1 and Figure 4 shown, the matching structure further includes a wear-resistant member 303 provided on the cover body 301. The wear-resistant member 303 can be slidably matched with the leg arm 201. When the leg arm 201 is converted from the deployed position to the retracted position, the sliding cooperation between the wear-resistant member 303 and the leg arm 201 is changed to the sliding cooperation between the sliding rod 302 and the sliding surface 2024, and then changed to the cooperation between the sliding rod 302 and the locking groove 2023. The wear-resistant member 303 can play a role in reducing the wear and abnormal noise between the protective cover 3 and the leg arm 201 during the overlapping and sliding process.

[0052] Furthermore, the wear-resistant member 303 has a smooth surface 3031 that is slidably matched with the leg arm 201. The wear-resistant member 303 is designed with a smooth surface, which can reduce its sliding friction coefficient during operation, improve wear resistance, and extend its service life. The wear-resistant member 303 is made of a plastic material such as nylon and is not easy to scratch the paint surface during the overlapping and sliding process with the leg arm 201, which can ensure the smooth and complete appearance of the leg arm 201.

[0053] It should be noted that the smooth design of the wear-resistant block can be replaced by round steel, bearings, rollers, pulleys, etc.

[0054] In one embodiment, the protective cover 3 further includes a support member 304. The support member 304 is disposed inside the cover body 301. The sliding rod 302 is passed through the support member 304 and the cover body 301, and the wear-resistant member 303 is fixed on the support member 304. On the one hand, the support member 304 can provide positioning and support for the sliding rod 302, and on the other hand, through the connection with the sliding rod 302, the strength of the protective cover 3 is enhanced.

[0055] Furthermore, the numbers of the support member 304 and the wear-resistant member 303 are both two and are arranged in one-to-one correspondence. The two wear-resistant members 303 are in one-to-one correspondence and cooperation with the two arm plates of the leg arm 201.

[0056] Specifically, the wear-resistant member 303 is a wear-resistant block, and the support member 304 is a support plate, which is convenient for processing and manufacturing and reduces costs. The two wear-resistant blocks are correspondingly fixedly connected to the threaded holes 3041 of the two support plates by screws.

[0057] In one embodiment, the cover body 301 includes a top plate 3011 and side plates 3012 located on both sides of the leg frame 1. The two side plates 3012 are hinged to the leg frame 1, and the top plate 3011 covers the end of the leg frame 1. The top plate 3011 arches and bends towards the side away from the side plates 3012, increasing its own stiffness and being not easily deformed. The cover body 301 is formed by bending a plate, which is convenient for processing.

[0058] Furthermore, the top plate 3011 has two plate segments that are oppositely arranged and form an obtuse angle, that is, a bending design is adopted at the top center of the top plate 3011. While the sliding rod 302 in the protective cover 3 forms mechanical self-locking when lapping and sliding with the vertical plate 2022 of the leg seat 202, it cooperates with the bending design at the top of the cover body 301 to further enhance the strength of the protective cover 3.

[0059] It can be understood that in other embodiments, the top plate 3011 can be arched.

[0060] Furthermore, the protective cover 3 is made of steel and plastic parts, without complex components, being easy to process and manufacture, having low production costs and being not easily damaged.

[0061] Furthermore, one side of the two side plates 3012 has a rotary connection hole 3013, and the other side of one side plate 3012 is provided with a sliding rod connection hole 3014. Two support plates are symmetrically fixed on the top plate 3011. The support plates are provided with a connection hole for the sliding rod 302 to pass through and a threaded hole 3041 for fixing the wear-resistant block. One end of the sliding rod 302 is fixed in the sliding rod connection hole 3014 of one side plate 3012, and the other end is fixed on the support plate farther from the sliding rod connection hole 3014. The middle section of the sliding rod 302 is fixed in the support plate closer to the sliding rod connection hole 3014. The protective cover 3 further includes two rotary sleeves 305 and two connection sleeves 306. The two rotary sleeves 305, the two rotary connection holes 3013 and the two connection sleeves 306 are arranged in one-to-one correspondence. The rotary sleeves 305 are fixed in the corresponding rotary connection holes 3013, and the connection sleeves 306 are sleeved inside the rotary sleeves 305. The rotary sleeves 305 are arranged at the rotary connection holes 3013 of the side plates 3012, increasing the rotary contact area between the rotary connection holes 3013 and the connection sleeves 306, and improving the stability and wear resistance when the protective cover 3 rotates.

[0062] Specifically, the length of the connection sleeve 306 is longer than the length of the rotary sleeve 305. The connection sleeve 306 is fixedly connected to the mounting plate 102 by bolts, which can ensure the smooth rotation of the protective cover 3 that is sleeved and rotated.

[0063] Further, during assembly, first align the protective cover 3 with the threaded hole 3041 on the mounting plate 102, then slip the connecting sleeve 306 onto the rotary sleeve 305, and finally insert the bolt with the washer through the connecting sleeve 306 and tighten it on the mounting plate 102. During disassembly, after loosening the bolt, remove the connecting sleeve 306 and the protective cover 3. The disassembly and assembly operations are not complex. The disassembly of the protective device can be achieved only by disassembling and assembling the bolt, which is beneficial to the repair and replacement of parts.

[0064] It should be noted that the rotational connection between the protective cover 3 and the mounting plate 102 can use hinges, bearings, pin shafts, etc. to replace the above-mentioned socketed rotary structure.

[0065] In one embodiment, as Figure 1 and Figure 5 shown, the leg base 202 includes a bottom plate 2021 and two vertical plates 2022. The two vertical plates 2022 are spaced apart on the bottom plate 2021. One vertical plate 2022 has a locking groove 2023 and a sliding surface 2024. By forming the locking groove 2023 and the sliding surface 2024 on one vertical plate 2022, the structure is simple and easy to machine. The leg base 202 uses a single vertical plate 2022 to lock the protective cover 3 in the retracted state, reducing the probability of the problem that the sliding rod 302 is difficult to match the locking groove 2023 of the vertical plate 2022 due to manufacturing errors during double vertical plate locking, and improving the reliability of the structure.

[0066] It should be noted that the single vertical plate locking design in the leg base 202 can be replaced by a double vertical plate locking design.

[0067] In one embodiment, the leg base 202 further includes a strengthening structure, and the strengthening structure is connected to both the vertical plate 2022 and the bottom plate 2021. The strengthening structure can enhance the structural strength of the leg base 202 and improve the stability of the vertical plate 2022.

[0068] Further, the strengthening structure includes a strengthening plate 2025 and a reinforcing rib plate 2026. The two ends of the strengthening plate 2025 are respectively fixed to the inner sides of the two vertical plates 2022 and the bottom side is fixedly connected to the bottom plate 2021. The reinforcing rib plate 2026 is fixedly connected to the outer side of the vertical plate 2022 and is fixedly connected to the bottom plate 2021. The two vertical plates 2022 are symmetrically fixed to the front and rear sides of the bottom plate 2021. By providing the strengthening plate 2025 and the reinforcing rib plate 2026 on the inner and outer sides of the vertical plate 2022, the stability of the vertical plate 2022 in the front - rear direction can be improved.

[0069] Specifically, both side edges of the bottom plate 2021 in the left - right direction are bent upward to form bent edges, which improves the stability of the vertical plates 2022 in the left - right direction. The number of reinforcing plates 2025 is two, and the number of reinforcing rib plates 2026 is four. The two reinforcing plates 2025 are located between the two vertical plates 2022 and are arranged at intervals at the positions on the bottom plate 2021 close to the left - right bent edges. The left - right positions of the reinforcing plates 2025 and the reinforcing rib plates 2026 are correspondingly set relative to the bottom plate 2021, and the shape of the reinforcing rib plates 2026 is triangular or the like.

[0070] It should be noted that the left, right, front, and rear of the indicated directions are Figure 1 the directions of "left, right, front, and rear" indicated by the arrows in

[0071] It can be understood that in another embodiment, both of the two vertical plates 2022 have locking grooves 2023 and sliding surfaces 2024.

[0072] In one embodiment, as Figure 1 shown, the outrigger frame 1 includes a frame body 101 and a mounting plate 102 fixed on the inner side of the frame body 101. One side of the protective cover 3 is hinged on the mounting plate 102. By hinging the mounting plate 102 and the protective cover 3, it is convenient for installation and also facilitates the swinging of the protective cover 3. The protective cover 3 is fixedly connected to the mounting plate 102 by bolts.

[0073] In one embodiment, the outrigger arm 201 is triangular, and hinge holes are provided at three corner portions of the outrigger arm 201. The three hinge holes are respectively a first hinge hole, a second hinge hole, and a third hinge hole. The first hinge hole is hinged to the outrigger frame 1 through a first hinge shaft 2011, the second hinge hole is hinged to the head of the piston rod of the outrigger cylinder through a second hinge shaft 2012, the third hinge hole is hinged to the outrigger seat 202 through a third hinge shaft, the cylinder seat of the outrigger cylinder is hinged on the outrigger frame 1, and one side of the protective cover 3 close to the outrigger cylinder is lapped on the outrigger arm 201 through a wear - resistant block.

[0074] According to an embodiment of the present invention, on the other hand, a construction machinery is also provided, including: the above - mentioned outrigger device.

[0075] Furthermore, the construction machinery has a vehicle - supporting state and a retracted state. When the construction machinery is in the vehicle - supporting state, the outrigger arm 201 is in the deployed position, and when the construction machinery is in the retracted state, the outrigger arm 201 is in the retracted position.

[0076] Furthermore, the construction machinery includes, but is not limited to, excavators, cranes, pile drivers, mixers, etc.

[0077] Next, in combination with Figures 1 to 5 the working process of the construction machinery will be described as follows:

[0078] When the whole construction machinery switches from the outrigger state to the retracted state: The outrigger cylinder gradually contracts under the action of the hydraulic system and drives the outrigger arm 201 to rotate and retract around the first hinge hole; The protective cover 3 relies on the two wear-resistant blocks to maintain lap contact with the outrigger arm 201 under its own gravity, and under the thrust of the outrigger arm 201, relative slip occurs between the protective cover 3 and the outrigger arm 201, and it rotates and elevates around the connecting sleeve 306; At this time, the outrigger base 202 elevates with the outrigger arm 201, and under its own gravity, the bottom surface of its base plate 2021 switches from a state parallel to the ground to a state parallel to the lower edge of the outrigger arm 201; When the total length of the outrigger cylinder contracts to near its installation distance, the base plate 2021 of the outrigger base 202 is already parallel to the lower edge of the outrigger arm 201, and the reinforcing plate 2025 plays a positioning and limiting role, and the lap slip between the wear-resistant block and the outrigger arm 201 changes to the lap slip between the slide bar 302 and the vertical plate 2022 of the outrigger base 202. Finally, after the length of the outrigger cylinder contracts to the installation distance, the outrigger arm 201 completes the retraction, and the slide bar 302 of the protective cover 3 laps in the locking groove 2023 of the vertical plate 2022, so that the outrigger arm 201 is in the retracted position. The protective cover 3 can closely adhere to the outrigger arm 201 without the help of reset components such as springs and has self-locking properties. Even if interfered by external forces, the protective cover 3 will not overturn, and the protection is comprehensive and reliable.

[0079] When the whole machine needs to perform outrigger operation: The outrigger cylinder gradually extends under the action of the hydraulic system and drives the outrigger arm 201 to rotate and lower around the first hinge hole; The protective cover 3 rotates and lowers around the connecting sleeve 306 under its own gravity, and relies on the slide bar 302 to maintain lap contact and relative slip with the locking groove 2023 in the vertical plate 2022; The outrigger base 202 lowers with the outrigger arm 201, and under its own gravity, the bottom surface of its base plate 2021 switches from a state parallel to the lower edge of the outrigger arm 201 to a state parallel to the ground; When the outrigger cylinder extends a certain length, the lap slip between the slide bar 302 and the vertical plate 2022 of the outrigger base 202 changes to the lap slip between the wear-resistant block and the outrigger arm 201. Finally, when the piston rod of the outrigger cylinder fully extends, the outrigger arm 201 completes the lowering, and the protective cover 3 relies on the wear-resistant block to lap on the upper edge of the outrigger arm 201, and the base plate 2021 of the outrigger base 202 fits with the ground. At this time, the protective cover 3 can protect the outrigger cylinder and the cavity in the outrigger frame 1 where it is located, making the outrigger work more reliable, stable and smooth. At the same time, while the outrigger cylinder is effectively protected, it is difficult for stones and foreign objects to enter the outrigger rotation part, avoiding damage to the piston rod of the cylinder and jamming when the outrigger arm 201 retracts.

[0080] Through the protective cover 3 rotating around the connecting sleeve 306 by its own gravity and lapping with the outrigger arm 201 and the outrigger base 202 to achieve the linkage design of two-stage sliding, the protective cover 3 realizes self-locking in the retracted position, and uses its own gravity and the acting force of the outrigger cylinder to achieve its reciprocating protection function of vehicle support and retraction, without adding additional drive or reciprocating elastic elements, with simple structure, practicality, comprehensive and reliable protection, convenient disassembly and assembly, and low cost.

[0081] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A outrigger device, characterized in that, Comprising: Outrigger frame (1); Outrigger components (2), including outrigger arms (201), outrigger seats (202) and outrigger drive members (203), wherein the outrigger arms (201) are hinged to the outrigger frame (1), the outrigger seats (202) are hinged to the outrigger arms (201), one end of the outrigger drive member (203) is hinged to the outrigger frame (1), the other end of the outrigger drive member (203) is hinged to the outrigger arm (201), the outrigger arms (201) have a retracted position and a deployed position, and the outrigger seats (202) have locking portions; A protective cover (3), one side of which is hinged to the outrigger frame (1), and the protective cover (3) can swing with the swing of the outrigger arm (201); Wherein, the outrigger seat (202) has a locked state in which the locking portion locks the other side of the protective cover (3) when the outrigger arm (201) swings to the retracted position and an unlocked state in which the locking portion unlocks the protective cover (3) when the outrigger arm (201) is deployed. The other side of the protective cover (3) and the locking portion are locked and matched to form a mechanical self-locking structure to prevent the protective cover (3) from overturning.

2. The outrigger device according to claim 1, wherein, The protective cover (3) includes a cover body (301) and a matching structure. The matching structure is arranged on the cover body (301), and the matching structure and the locking portion are locked and matched to form the mechanical self-locking structure.

3. The outrigger device according to claim 2, characterized in that, The matching structure includes a slide bar (302), the locking portion is a locking groove (2023), and the outrigger seat (202) further has a sliding surface (2024) connected to the locking groove (2023), and the slide bar (302) can be slidably matched with the sliding surface (2024).

4. The outrigger device according to claim 3, characterized in that, When the outrigger seat (202) is in the locked state, the included angle between the connection line of the rotation center of the protective cover (3) and the center of the slide bar (302) and the horizontal plane is A, and 58° ≤ A ≤ 68°.

5. The outrigger device according to claim 3, characterized in that, The matching structure further includes a wear-resistant member (303) arranged on the cover body (301). The wear-resistant member (303) can be slidably matched with the outrigger arm (201). When the outrigger arm (201) is converted from the deployed position to the retracted position, the sliding cooperation between the wear-resistant member (303) and the outrigger arm (201) is changed to the sliding cooperation between the slide bar (302) and the sliding surface (2024), and then changed to the cooperation between the slide bar (302) and the locking groove (2023).

6. The outrigger device according to claim 5, characterized in that, The protective cover (3) further includes a support member (304). The support member (304) is arranged in the cover body (301). The slide bar (302) is arranged through the support member (304) and the cover body (301), and the wear-resistant member (303) is fixed on the support member (304).

7. The outrigger device according to claim 5, wherein, The wear-resistant member (303) has a smooth surface (3031) that is slidably matched with the outrigger arm (201).

8. The outrigger device according to claim 3 or 4, characterized in that, The outrigger seat (202) includes a bottom plate (2021) and two vertical plates (2022). The two vertical plates (2022) are arranged on the bottom plate (2021) at intervals, and at least one of the vertical plates (2022) has the locking groove (2023) and the sliding surface (2024).

9. The outrigger device according to any one of claims 1 to 4, characterized in that, The outrigger frame (1) includes a frame body (101) and a mounting plate (102) fixed to the inner side of the frame body (101). One side of the protective cover (3) is hinged to the mounting plate (102).

10. An engineering machinery, characterized in that, Comprising: The outrigger device according to any one of claims 1 to 9.

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