Automatic overturning supporting leg mechanism and lorry-mounted crane

Abstract

The utility model provides an automatic turnover landing leg mechanism and a lorry-mounted crane, and the automatic turnover landing leg mechanism comprises a movable landing leg, a first connecting assembly, a second connecting assembly, a motor, a transmission gear, a gear transmission mechanism and a vertical oil cylinder, the first connecting assembly and the second connecting assembly are oppositely arranged and fixedly connected to the movable supporting leg, an output shaft of the motor is connected with the transmission gear, the transmission gear is meshed with the gear transmission mechanism, the gear transmission mechanism is connected between the first connecting assembly and the second connecting assembly, and the first connecting assembly and the second connecting assembly are fixedly connected to the movable supporting leg. The vertical oil cylinder is connected to the gear transmission mechanism, when the motor drives the vertical oil cylinder, the transmission gear drives the gear transmission mechanism to rotate, and the vertical oil cylinder rotates along with the gear transmission mechanism to achieve switching between an unfolding state and a folding state. The automatic supporting leg overturning mechanism is compact in structure, large in space utilization rate, high in reliability and capable of meeting the working condition requirements of different speed scenes.

Description

Technical Field

[0001] This utility model relates to the field of basic construction technology, and in particular to an automatic tilting outrigger mechanism and a truck-mounted crane. Background Technology

[0002] A truck-mounted crane is a multi-action lifting machine installed on a truck chassis, capable of vertically lifting and horizontally moving heavy objects within a certain range. Also known as a truck-mounted hoist, it belongs to the category of material handling machinery. Domestic industries are placing increasingly higher demands on the functionality of cranes, especially on truck-mounted cranes that combine lifting and transportation functions. With economic development and higher societal needs, medium and large-tonnage truck-mounted cranes are increasingly being used across various industries.

[0003] Most existing truck-mounted cranes use a four-bar linkage mechanism (such as CN205892581U) for their automatic tilting outrigger mechanism. This mechanism uses hydraulic cylinders to drive the outriggers to rotate, resulting in a long transmission route and a large space occupation. Furthermore, each linkage is hinged to the hydraulic cylinder. Due to machining errors or long-term wear, gaps may form at the hinges, reducing the operating accuracy of the automatic tilting outrigger mechanism and causing loosening and abnormal noise, thus weakening its reliability. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide an automatic flipping outrigger mechanism that can solve the problems existing in the prior art, has a compact structure, high space utilization, high reliability, and can be applied to working conditions with different flipping speeds.

[0005] This utility model provides an automatic flipping outrigger mechanism, including a movable outrigger, a first connecting component, a second connecting component, a motor, a transmission gear, a gear transmission mechanism, and a vertical hydraulic cylinder. The first connecting component and the second connecting component are arranged opposite to each other and are respectively fixedly connected to the movable outrigger. The output shaft of the motor is connected to the transmission gear, and the transmission gear meshes with the gear transmission mechanism. The gear transmission mechanism is connected between the first connecting component and the second connecting component. The vertical hydraulic cylinder is connected to the gear transmission mechanism. When the motor is driven, the transmission gear drives the gear transmission mechanism to rotate, and the vertical hydraulic cylinder follows the rotation of the gear transmission mechanism to achieve switching between the unfolded state and the retracted state.

[0006] In one embodiment, the gear transmission mechanism includes a first gear assembly, a second gear assembly, and a third gear assembly. The first gear assembly meshes with the transmission gear, the second gear assembly meshes with the first gear assembly, and the third gear assembly meshes with the second gear assembly. The vertical cylinder is connected to the third gear assembly.

[0007] In one embodiment, the first gear assembly includes a first double gear, a first connecting shaft, and a first cover plate. The first connecting shaft passes through the first double gear and is fixedly connected between the first connecting assembly and the second connecting assembly. The first cover plate is fixedly connected to the first connecting assembly to limit the movement of the first connecting shaft. The second gear assembly includes a second double gear, a second connecting shaft, and a second cover plate. The second connecting shaft passes through the second double gear and is fixedly connected between the first connecting assembly and the second connecting assembly. The second cover plate is fixedly connected to the first connecting assembly to limit the movement of the second connecting shaft.

[0008] In one embodiment, the first double gear and the second double gear are each an integral structure.

[0009] In one embodiment, the third gear assembly includes a third gear, a third connecting shaft, a third cover plate, and a fourth cover plate. The third connecting shaft passes through the third gear and is connected between the first connecting assembly and the second connecting assembly. The third cover plate is fixedly connected to the first connecting assembly to limit the movement of the third connecting shaft, and the fourth cover plate is fixedly connected to the second connecting assembly to limit the movement of the third connecting shaft.

[0010] In one embodiment, the vertical cylinder is fixedly connected to a connecting seat, the connecting seat including a first connecting plate and a second connecting plate disposed opposite to each other, the first connecting plate and the second connecting plate being disposed opposite to each other, the third connecting shaft passing through the first connecting plate and the second connecting plate, and the third gear being disposed between the first connecting plate and the second connecting plate.

[0011] In one embodiment, the first connecting plate and the second connecting plate are respectively provided with a first positioning hole and a second positioning hole. When the vertical cylinder is extended, the pin passes through the first connecting component, the first positioning hole and the second connecting component; when the vertical cylinder is retracted, the pin passes through the first connecting component, the second positioning hole and the second connecting component.

[0012] In one embodiment, the automatic flipping outrigger mechanism further includes a limiting device connected to the movable outrigger. When the vertical cylinder retracts, the limiting device is used to limit the vertical cylinder.

[0013] In one embodiment, the limiting device includes a limiting seat, an adjusting nut, an adjusting bolt, and a flexible sleeve. The limiting seat is fixedly connected to the movable support leg, the adjusting nut is fixedly connected to the limiting seat, the adjusting bolt cooperates with the adjusting nut to adjust the length of the adjusting bolt to adjust the position of the vertical cylinder when it retracts, and the flexible sleeve is connected to the adjusting bolt.

[0014] This utility model also relates to a truck-mounted crane, including the aforementioned automatic tilting outrigger mechanism.

[0015] The first and second connecting components of the automatic tilting outrigger mechanism of this utility model are fixedly connected to the movable outrigger, and a gear transmission mechanism is arranged between the first and second connecting components. The gear transmission mechanism meshes with the transmission gear, and the vertical cylinder is connected to the gear transmission mechanism. Therefore, by changing the number of teeth and the module of the gear transmission mechanism, the gear ratio can be changed, so that the automatic tilting outrigger mechanism can be applied to the working conditions of different speed scenarios. In addition, since the gear transmission mechanism is arranged between the first and second connecting components, the gear transmission mechanism can achieve a large-angle tilting function in a small space, so that the vertical cylinder can rotate between the first and second connecting components. Therefore, the structure is compact, the space utilization rate is large, and the reliability of the structure is improved. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the automatic flipping support leg mechanism of this utility model when the vertical hydraulic cylinder is deployed.

[0018] Figure 2 This is a schematic diagram of the structure of the automatic flipping support leg mechanism of this utility model when the vertical hydraulic cylinder is retracted.

[0019] Figure 3 This is a partial structural diagram of the automatic flipping support leg mechanism of this utility model.

[0020] Figure 4 This is a partial structural schematic diagram of the automatic flipping support leg mechanism of this utility model.

[0021] Figure 5 This is a schematic diagram of the helical bevel gear of the transmission gear of this utility model.

[0022] Figure 6This is a schematic diagram of the structure of the first double gear of this utility model.

[0023] Figure 7 This is a schematic diagram of the structure of the second double gear of this utility model.

[0024] Figure 8 This is a schematic diagram of the structure of the third gear of this utility model.

[0025] Figure 9 This is a schematic diagram showing the disassembled structure of the connection seat between the third gear and the vertical cylinder of this utility model.

[0026] Figure 10 This is a structural schematic diagram of the first inner plate, the first outer plate, the second inner plate, and the second outer plate of this utility model.

[0027] Figure 11 This is a schematic diagram of the limiting device of this utility model.

[0028] Reference numerals: First keyway - 101; First connecting hole - 102; Second connecting hole - 103; Third connecting hole - 104; Fourth connecting hole - 105; Fifth connecting hole - 106; Sixth connecting hole - 107; First blind hole - 108; Second blind hole - 109; First mounting slot - 201; Second mounting slot - 202; First positioning hole - 203; Second positioning hole - 204; Third positioning hole - 205; Fourth positioning hole - 20 6; Fifth positioning hole - 207, Sixth positioning hole - 208; Seventh positioning hole - 209; Eighth positioning hole - 301; First mounting hole - 302; Second mounting hole - 303; Third mounting hole - 304; Movable support leg - 11; Flat plate - 111; First connecting assembly - 12; First outer plate - 121; First inner plate - 122; Second connecting assembly - 13; Second outer plate - 131; Second inner plate - 132; Motor - 14; Transmission gear -15; Cylindrical shaft -151; Helical bevel gear -152; Sliding bearing -153; First gear assembly -16; First double gear -161; First connecting shaft -162; First cover plate -163; First bearing -164; First bushing -165; Second gear assembly -17; Second double gear -171; Second connecting shaft -172; Second cover plate -173; Second bearing -174; Second bushing -175; Third gear assembly -18; Third gear -181; Third connecting shaft -182; Third cover plate -183; Fourth cover plate -184; Second flat key -185; Third flat key -186; Fourth flat key -187; Vertical cylinder -19; Connecting seat -19a; First connecting plate -191; Second connecting plate -192; Pin -193; Limiting device -21; Limiting seat -211; Adjusting nut -212; Adjusting bolt -213; Flexible sleeve -214.

[0029] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0030] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of this utility model. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0031] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0032] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0034] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0035] like Figure 1 and Figure 11As shown, the automatic tilting outrigger mechanism includes a movable outrigger 11, a first connecting assembly 12, a second connecting assembly 13, a motor 14, a transmission gear 15, a gear transmission mechanism, and a vertical cylinder 19. The first connecting assembly 12 and the second connecting assembly 13 are arranged opposite to each other and fixedly connected to the movable outrigger 11. The output shaft of the motor 14 is connected to the transmission gear 15, and the transmission gear 15 meshes with the gear transmission mechanism. The gear transmission mechanism is connected between the first connecting assembly 12 and the second connecting assembly 13. The vertical cylinder 19 is connected to the gear transmission mechanism. When the motor 14 is driven, the transmission gear 15 drives the gear transmission mechanism to rotate, and the vertical cylinder 19 follows the rotation of the gear transmission mechanism to switch between the extended state and the retracted state. When the vertical cylinder 19 is in the extended state, it supports the movable outrigger 11. When the vertical cylinder 19 is in the retracted state, it can move with the vehicle. In this embodiment, the movable support leg 11 is further provided with a flat plate 111, which is fixedly connected to the side of the movable support leg 11 near the ground. The first connecting component 12 and the second connecting component 13 are respectively fixedly connected to the flat plate 111. The first connecting component 12 includes a first inner plate 122 and a first outer plate 121, and the second connecting component 13 includes a second inner plate 132 and a second outer plate 131. The movable support leg 11, the flat plate 111, the first inner plate 122, the first outer plate 121, the second inner plate 132, and the second outer plate 131 are welded together. The remaining components of the automatic flipping support leg mechanism are assembled. The movable support leg 11 has a rectangular hollow structure. The motor 14 is fixedly connected inside the movable support leg 11. The motor 14 is a cycloidal motor 14. The output shaft of the motor 14 passes through the movable support leg 11 and the flat plate 111 and is connected to the transmission gear 15. The transmission gear 15 is provided with a first keyway 101 (e.g., Figure 3 , Figure 4 and Figure 6 As shown, the output shaft of motor 14 is connected to the first keyway 101 of transmission gear 15 via a first flat key. The output shaft of motor 14 transmits torque to transmission gear 15 via the first flat key. Transmission gear 15 is also provided with a sliding bearing 153. Transmission gear 15 includes a cylindrical shaft 151 and a bevel gear 152 connected to the cylindrical shaft 151. The cylindrical shaft 151 passes through the sliding bearing 153, which serves as a lubricant and can balance the radial force exerted by the bevel gear 152 on the output shaft of motor 14, preventing the output shaft of cycloidal motor 14 from failing due to excessive bending moment. Transmission gear 15 cooperates with gear transmission mechanism to rotate the torque of motor 14 output shaft by 90° and transmit it to gear transmission mechanism. Gear transmission mechanism transmits torque to vertical cylinder 19, enabling vertical cylinder 19 to perform a tilting function. Among them, the first inner plate 122, the first outer plate 121, the second inner plate 132, and the second outer plate 131 are all L-shaped plates.

[0036] The first connecting component 12 and the second connecting component 13 of the automatic tilting outrigger mechanism of this utility model are fixedly connected to the movable outrigger 11, and the gear transmission mechanism is arranged between the first connecting component 12 and the second connecting component 13. The gear transmission mechanism meshes with the transmission gear 15, and the vertical cylinder 19 is connected to the gear transmission mechanism. Therefore, by changing the number of teeth and the module of the gear transmission mechanism, the gear ratio can be changed, so that the automatic tilting outrigger mechanism can be applied to the working conditions of different tilting speed scenarios. In addition, since the gear transmission mechanism is arranged between the first connecting component 12 and the second connecting component 13, the gear transmission mechanism can achieve a large-angle tilting function in a small space, so that the vertical cylinder 19 can rotate between the first connecting component 12 and the second connecting component 13. Therefore, the structure is compact, the space utilization rate is large, and the reliability of the structure is improved.

[0037] like Figure 2 As shown, the gear transmission mechanism includes a first gear assembly 16, a second gear assembly 17, and a third gear assembly 18. The first gear assembly 16 meshes with the transmission gear 15, the second gear assembly 17 meshes with the first gear assembly 16, the third gear assembly 18 meshes with the second gear assembly 17, and the vertical cylinder 19 is connected to the third gear assembly 18.

[0038] like Figures 3 to 8As shown, the first gear assembly 16 includes a first double gear 161, a first connecting shaft 162, and a first cover plate 163. The first connecting shaft 162 passes through the first double gear 161 and is fixedly connected between the first connecting assembly 12 and the second connecting assembly 13. The first cover plate 163 is fixedly connected to the first connecting assembly 12 to limit the first connecting shaft 162. The second gear assembly 17 includes a second double gear 171, a second connecting shaft 172, and a second cover plate 173. The second connecting shaft 172 passes through the second double gear 171 and is fixedly connected between the first connecting assembly 12 and the second connecting assembly 13. The second cover plate 173 is fixedly connected to the first connecting assembly 12 to limit the second connecting shaft 172. Specifically, the first outer plate 121 includes a first connecting hole 102 and a second connecting hole 103 spaced apart; the first inner plate 122 includes a fourth connecting hole 105 and a fifth connecting hole 106 spaced apart; the second inner plate 132 includes a first blind hole 108 and a second blind hole 109; a first connecting shaft 162 passes through the first connecting hole 102 and the fourth connecting hole 105, with one end of the first connecting shaft 162 abutting against the first blind hole 108; and a second connecting shaft 172 passes through the second connecting hole 103 and the fifth connecting hole 106, with one end of the second connecting shaft 172... The first inner plate 122 is provided with a first mounting groove 201 and a second mounting groove 202. The first mounting groove 201 communicates with the fourth connecting hole 105. A first cover plate 163 is disposed in the first mounting groove 201 and fixedly connected to the first inner plate 122 by bolts, for limiting the first connecting shaft 162. The second mounting groove 202 communicates with the fifth connecting hole 106. A second cover plate 173 is disposed in the second mounting groove 202 and fixedly connected to the first inner plate 122 by bolts, for limiting the second connecting shaft 172. In this embodiment, the first connecting hole 102 and the second connecting hole 103 are oblong holes.

[0039] Preferably, the first gear assembly 16 further includes a first bearing 164 and a first bushing 165. The first bearing 164 is disposed between the first double gear 161 and the first connecting shaft 162, which can reduce the friction between the first connecting shaft 162 and the first double gear 161, avoid wear failure between the gear holes of the first connecting shaft 162 and the first double gear 161, and prevent vibration and abnormal noise. It can also reduce energy loss. The first connecting shaft 162 passes through the first bushing 165, which is used to protect the first connecting shaft 161. 2; The second gear assembly 17 also includes a second bearing 174 and a second bushing 175. The second bearing 174 is disposed between the second double gear 171 and the second connecting shaft 172, which can reduce the friction between the second connecting shaft 172 and the second double gear 171, avoid wear failure between the gear holes of the second connecting shaft 172 and the second double gear 171, generate vibration and abnormal noise, and also reduce energy loss. The second connecting shaft 172 passes through the second bushing 175, which is used to protect the second connecting shaft 172.

[0040] Preferably, the first double gear 161 and the second double gear 171 are integral structures, that is, the first double gear 161 and the second double gear 171 are machined as a single piece, which is compact, avoids the use of flat key connection, eliminates the need to open keyways on the shaft and gears to weaken their mechanical properties, reduces the number of parts and processing steps, and is more economical.

[0041] like Figure 3 , Figure 4 and Figure 9 As shown, the third gear assembly 18 includes a third gear 181, a third connecting shaft 182, a third cover plate 183, and a fourth cover plate 184. The third connecting shaft 182 passes through the third gear 181 and is connected between the first connecting assembly 12 and the second connecting assembly 13. The third cover plate 183 is fixedly connected to the first connecting assembly 12 to limit the third connecting shaft 182. The fourth cover plate 184 is fixedly connected to the second connecting assembly 13 to limit the third connecting shaft 182.

[0042] Preferably, the bevel gear 152 of the transmission gear 15 meshes with the pinion of the first double gear 161, the pinion of the first double gear 161 meshes with the large gear of the second double gear 171, and the third gear 181 meshes with the pinion of the second double gear 171, so as to realize the meshing connection between the transmission gear 15 and the gear transmission mechanism.

[0043] like Figure 9 and Figure 10As shown, the vertical cylinder 19 is fixedly connected to a connecting seat 19a. The connecting seat 19a includes a first connecting plate 191 and a second connecting plate 192 that are arranged opposite to each other. The first connecting plate 191 and the second connecting plate 192 are arranged opposite to each other. A third connecting shaft 182 passes through the first connecting plate 191 and the second connecting plate 192. A third gear 181 is arranged between the first connecting plate 191 and the second connecting plate 192. Specifically, the first outer plate 121 is provided with a third connecting hole 104, the first inner plate 122 is provided with a sixth connecting hole 107, the first connecting plate 191 and the second connecting plate 192 are respectively provided with a first mounting hole 302, the second inner plate 132 is provided with a second mounting hole 303, the second outer plate 131 is provided with a third mounting hole 304, and the third connecting shaft 182 is provided by passing through the third connecting hole 104, the sixth connecting hole 107, the first mounting hole 302, the second mounting hole 303 and the third mounting hole 304 in sequence. The third cover plate 183 is fixedly connected to the side of the first outer plate 121 away from the first inner plate 122 by bolts, and the fourth cover plate 184 is fixedly connected to the side of the second outer plate 131 away from the second inner plate 132 by bolts. The third cover plate 183 and the fourth cover plate 184 are used to limit the third connecting shaft 182.

[0044] In this embodiment, the shaft is limited by the first cover plate 163, the second cover plate 173, the third cover plate 183 and the fourth cover plate 184. Compared with the traditional snap ring limit, it is more reliable and less likely to cause the shaft to fall off due to damage to the snap ring caused by vehicle vibration or collision.

[0045] like Figure 3 and Figure 9 As shown, the third connecting shaft 182 is provided with a second keyway, a third keyway and a fourth keyway. The second keyway, the third keyway and the fourth keyway are spaced apart along the length direction of the third connecting shaft 182. A second flat key 185, a third flat key 186 and a fourth flat key 187 are respectively installed in the second keyway, the third keyway and the fourth keyway. The third connecting shaft 182 is connected to the third gear 181 through the third flat key 186. The third connecting shaft 182 is connected to the first connecting plate 191 and the second connecting plate 192 of the connecting seat 19a through the second flat key 185 and the fourth flat key 187 respectively.

[0046] like Figure 3 , Figure 9 and Figure 10As shown, the first connecting plate 191 and the second connecting plate 192 are respectively provided with a first positioning hole 203 and a second positioning hole 204. When the vertical cylinder 19 is extended, the pin 193 passes through the first connecting component 12, the first positioning hole 203 and the second connecting component 13. When the vertical cylinder 19 is retracted, the pin 193 passes through the first connecting component 12, the second positioning hole 204 and the second connecting component 13. Specifically, the first outer plate 121 is provided with a third positioning hole 205 and a fourth positioning hole 206, the first inner plate 122 is provided with a fifth positioning hole 207, the second inner plate 132 is provided with a sixth positioning hole 208, and the second outer plate 131 is provided with a seventh positioning hole 209 and an eighth positioning hole 301. When the vertical cylinder 19 is extended, that is, when the vertical cylinder 19 supports the movable support leg 11, the pin 193 passes through the third positioning hole 205, the fifth positioning hole 207, the first positioning hole 203, the sixth positioning hole 208, and the seventh positioning hole 209 respectively, and is fixed by a spring pin. When the vertical cylinder 19 is retracted, the pin 193 passes through the fourth positioning hole 206, the second positioning hole 204, and the eighth positioning hole 301 respectively, and is fixed by a spring pin. No additional mechanical lock or fixing device is required.

[0047] like Figure 1 and Figure 11 As shown, the automatic tilting outrigger mechanism also includes a limiting device 21, which is connected to the movable outrigger 11. When the vertical cylinder 19 retracts, the limiting device 21 is used to limit the vertical cylinder 19. Specifically, the limiting device 21 includes a limiting seat 211, an adjusting nut 212, an adjusting bolt 213, and a flexible sleeve 214. The limiting seat 211 is fixedly connected to the movable outrigger 11, the adjusting nut 212 is fixedly connected to the limiting seat 211, and the adjusting bolt 213 cooperates with the adjusting nut 212 to adjust the length of the adjusting bolt 213 to adjust the position of the vertical cylinder 19 when it retracts. The flexible sleeve 214 is connected to the adjusting bolt 213. When the vertical cylinder 19 retracts, it abuts against the limiting device. 21. The flexible sleeve 214 of the limiting device 21 can play the role of buffering, vibration reduction and noise reduction. The flexible sleeve 214 is preferably a nylon sleeve or a silicone sleeve, etc. When the pin 193 positions the vertical cylinder 19, the vertical cylinder 19 may rotate or wear due to long-term use, resulting in errors between the positioning holes, which may cause the pin 193 to fail to be positioned. The error when the vertical cylinder 19 rotates can be adjusted in real time by adjusting the adjusting bolt 213 to ensure that the pin 193 can be smoothly inserted into each positioning hole.

[0048] This utility model also relates to a truck-mounted crane, including the aforementioned automatic tilting outrigger mechanism.

[0049] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. An automatic turnover outrigger mechanism, characterized in that, The utility model provides an active leg (11), first connecting assembly (12), second connecting assembly (13), motor (14), transmission gear (15), gear transmission mechanism and vertical oil cylinder (19), first connecting assembly (12) and second connecting assembly (13) are oppositely arranged and are fixedly connected respectively in active leg (11), the output shaft of motor (14) is connected with transmission gear (15), transmission gear (15) is engaged with gear transmission mechanism, gear transmission mechanism is connected between first connecting assembly (12) and second connecting assembly (13), vertical oil cylinder (19) is connected to gear transmission mechanism, when motor (14) drives, transmission gear (15) drives gear transmission mechanism to rotate, and vertical oil cylinder (19) follows gear transmission mechanism rotation to realize the switching of unfolding state and folding state.

2. The self-reversing outrigger mechanism of claim 1, wherein, Gear transmission mechanism includes first gear assembly (16), second gear assembly (17) and third gear assembly (18), first gear assembly (16) is engaged with transmission gear (15), second gear assembly (17) is engaged with first gear assembly (16), third gear assembly (18) is engaged with second gear assembly (17), and vertical oil cylinder (19) is connected to third gear assembly (18).

3. The self-reversing outrigger mechanism of claim 2, wherein, First gear assembly (16) includes first double coupling gear (161), first connecting shaft (162) and first cover plate (163), first connecting shaft (162) is arranged through first double coupling gear (161), first connecting shaft (162) is fixedly connected between first connecting assembly (12) and second connecting assembly (13), and first cover plate (163) is fixedly connected to first connecting assembly (12) for limiting first connecting shaft (162), second gear assembly (17) includes second double coupling gear (171), second connecting shaft (172) and second cover plate (173), second connecting shaft (172) is arranged through second double coupling gear (171), second connecting shaft (172) is fixedly connected between first connecting assembly (12) and second connecting assembly (13), and second cover plate (173) is fixedly connected to first connecting assembly (12) for limiting second connecting shaft (172).

4. The self-reversing outrigger mechanism of claim 3, wherein, First double coupling gear (161) and second double coupling gear (171) are integral structure respectively.

5. The self-reversing outrigger mechanism of claim 2, wherein, The third gear assembly (18) comprises a third gear (181), a third connecting shaft (182), a third cover plate (183) and a fourth cover plate (184), the third connecting shaft (182) is arranged through the third gear (181), the third connecting shaft (182) is connected between the first connecting assembly (12) and the second connecting assembly (13), the third cover plate (183) is fixedly connected to the first connecting assembly (12) for limiting the third connecting shaft (182), and the fourth cover plate (184) is fixedly connected to the second connecting assembly (13) for limiting the third connecting shaft (182).

6. The self-reversing outrigger mechanism of claim 5, wherein, The vertical oil cylinder (19) is fixedly connected with a connecting seat (19a), the connecting seat (19a) comprises oppositely arranged first and second connecting plates (191) and (192), the first connecting plate (191) is oppositely arranged with the second connecting plate (192), the third connecting shaft (182) is arranged through the first and second connecting plates (191) and (192), and the third gear (181) is arranged between the first and second connecting plates (191) and (192).

7. The self-reversing outrigger mechanism of claim 6, wherein, The first and second connecting plates (191) and (192) are respectively provided with first and second positioning holes (203) and (204), when the vertical oil cylinder (19) is unfolded, a pin shaft (193) is arranged through the first connecting assembly (12), the first positioning hole (203) and the second connecting assembly (13); when the vertical oil cylinder (19) is folded, the pin shaft (193) is arranged through the first connecting assembly (12), the second positioning hole (204) and the second connecting assembly (13).

8. The self-reversing outrigger mechanism of claim 2, wherein, The automatic turnover support leg mechanism further comprises a limiting device (21) connected to the movable support leg (11), when the vertical oil cylinder (19) is folded, the limiting device (21) is used for limiting the vertical oil cylinder (19).

9. The self-reversing outrigger mechanism of claim 8, wherein, The limiting device (21) comprises a limiting seat (211), an adjusting nut (212), an adjusting bolt (213) and a flexible sleeve (214), the limiting seat (211) is fixedly connected to the movable support leg (11), the adjusting nut (212) is fixedly connected to the limiting seat (211), the adjusting bolt (213) is matched with the adjusting nut (212) and can adjust the length of the adjusting bolt (213) to adjust the position of the vertical oil cylinder (19) when the vertical oil cylinder (19) is folded, and the flexible sleeve (214) is connected to the adjusting bolt (213).

10. A lorry crane, characterised in that An automatic turnover support leg mechanism comprising any one of claims 1 to 9.

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