Supporting leg locking device and crane

Abstract

The utility model discloses a supporting leg locking device and a crane. The supporting leg locking device comprises a mounting seat, a limiting support, a locking pin and a limiting piece, the mounting base is fixed to the side face of the supporting leg and comprises a locking pin barrel and an oil cylinder mounting position. The locking pin cylinder is arranged on one side of the mounting seat and penetrates through the mounting seat; the oil cylinder mounting position is arranged on the other side of the mounting seat; the limiting support is arranged below the mounting seat, and a positioning pin hole is formed in the top of the limiting support; a limiting through groove is formed in the outer wall of the locking pin cylinder; the locking pin is inserted into the locking pin cylinder, and the lower end of the locking pin leads to the positioning pin hole; one end of the limiting piece is connected with the locking pin, and the other end is located in the limiting through groove; the supporting legs are locked or unlocked through movement of the locking pins and the limiting pieces. The locking pin is inserted firstly, then the limiting piece is installed, the locking pin is installed on the installation base, the installation mode of the locking pin is simplified, and disassembly and assembly are more convenient; the locking pin is not easy to fall off and is safer; the mounting structure of the oil cylinder and the locking device are combined into a whole, so that the structural strength of the locking device is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering machinery, and in particular relates to a leg locking device and a crane. Background Art

[0002] In the field of construction machinery, a wheeled crane is a device for lifting heavy objects. Compared with tower cranes and crawler cranes, its advantage is that it can use the pneumatic tires installed on the frame to achieve its own transfer, and it is a road machine that can be driven on the road normally. The X-type outrigger is a support form for the movable outrigger of the crane, which is a mechanism used to maintain the stability of the crane. When working, the outriggers are pushed by the cylinder, and the four outriggers are spread out in an "X" shape around the hinge point to the outside of the frame to ensure that the crane has enough span to ensure the stability of the operation; after the operation is completed, the outriggers are retracted to both sides of the frame with the assistance of the cylinder. In order to meet the requirements of road driving, the widest part of the retracted outriggers cannot exceed the width of the frame. And it is necessary to ensure that during the driving process of the crane, the outriggers cannot swing out of control at will due to sudden situations such as oil leakage or failure of the cylinder. Therefore, the outriggers need to be locked on the frame.

[0003] The existing outrigger locking device uses bolts to fix the locking bolt to the limit support. When the tonnage of the crane is larger and the weight of the outrigger is heavier, the bolt will reach the force limit first, and the structural strength of the entire locking device is weak, which cannot be used for cranes with larger tonnage. At the same time, the locking pin is fixed by bolts, and the bolts need to be removed for replacement, which is inconvenient to disassemble and the locking pin is easy to fall off, posing a safety hazard.

[0004] Therefore, it is necessary to improve the structural strength of the locking device and to install the locking pin more conveniently to prevent the locking pin from falling off. Utility Model Content

[0005] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a leg locking device and a crane, which simplifies the installation method of the locking pin, makes it more convenient to disassemble and assemble, and improves the structural strength of the locking device.

[0006] The utility model provides the following technical solutions:

[0007] In the first aspect, a leg locking device is provided, comprising a mounting seat, a limit support, a locking pin and a limit piece; the mounting seat is fixed to the side of the leg, and the mounting seat comprises a locking pin barrel and a cylinder mounting position; the locking pin barrel is arranged on one side of the mounting seat and passes through the mounting seat; the cylinder mounting position is arranged on the other side of the mounting seat; the limit support is arranged below the mounting seat, and a positioning pin hole is arranged on the top of the limit support; a limit through groove is arranged on the outer wall of the locking pin barrel; the locking pin is inserted into the locking pin barrel, and the lower end of the locking pin leads to the positioning pin hole; one end of the limit piece is connected to the locking pin, and the other end is located in the limit through groove; the leg is locked or unlocked by moving the locking pin and the limit piece.

[0008] As a preferred technical solution of the utility model, the mounting base also includes an upper panel, a lower panel, an intermediate panel and a reinforcement block; the lower surface of the lower panel gradually decreases in the direction away from the support leg; the intermediate plate is installed between the upper panel and the lower panel, and is close to the support leg; locking pin holes are provided on one side of the front end of the upper panel and the lower panel; the locking pin cylinder is installed between the upper panel and the lower panel, and is connected to the two locking pin holes; the reinforcement block is arranged on the top of the upper panel close to the support leg.

[0009] As a preferred technical solution of the utility model, the cylinder mounting position includes a cylinder mounting hole and a circular ring; the other side of the front end of the upper panel and the lower panel is oppositely provided with a cylinder mounting hole, and the opposite side of the two cylinder mounting holes are both installed with circular rings.

[0010] As an optimal technical solution of the utility model, it also includes a limiting nylon block and a wedge-shaped nylon block; the limiting nylon block is installed on the side of the limiting support close to the support leg, and abuts against the side of the support leg; the wedge-shaped nylon block is arranged inside the limiting support, with the inclined surface of the wedge-shaped nylon block on the top and higher than the limiting support; the inclined surface of the wedge-shaped nylon block cooperates with the lower surface of the lower panel.

[0011] As a preferred technical solution of the utility model, the limiting through groove is divided into a non-locking groove, a transverse groove and a locking groove, and the non-locking groove and the locking groove are connected through the transverse groove; when the limiting member is located at the bottom end of the locking groove, the leg is locked; when the limiting member is located in the non-locking groove, the leg is unlocked.

[0012] As a preferred technical solution of the present utility model, the handle of the locking pin is located above the locking pin barrel.

[0013] As a preferred technical solution of the utility model, a threaded hole matching with the limiting member is formed on the outer surface of the locking pin; the threaded hole is exposed through the limiting through groove and is threadedly connected with the limiting member.

[0014] As a preferred technical solution of the utility model, the limiting member is one of a screw, a stud or a threaded pin.

[0015] In the second aspect, a crane is provided, comprising the outrigger locking device described in the first aspect; and also comprising a cylinder and a frame; one end of the cylinder is mounted on a mounting seat via a fixing pin that cooperates with the cylinder mounting hole, and the other end is fixed to the frame.

[0016] As a preferred technical solution of the utility model, the bottom of the limit support is fixed to the upper surface of the frame.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] 1. The leg locking device provided by the utility model includes a mounting seat, a limit support, a locking pin and a limit piece. The locking pin is installed on the mounting seat by first inserting the locking pin and then installing the limit piece, which simplifies the installation form of the locking pin, makes disassembly and assembly more convenient, and improves work efficiency. The locking pin is not easy to fall off and is safer.

[0019] 2. The outrigger locking device provided by the utility model has a cylinder mounting position on the mounting seat, and one end of the cylinder is mounted on the cylinder mounting position, so that the cylinder mounting structure and the locking device are combined into a whole, thereby improving the structural strength of the locking device, making it applicable to cranes with larger tonnage and more versatile. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a crane in an embodiment of the utility model;

[0021] Figure 2 yes Figure 1 A magnified view of middle;

[0022] Figure 3 This is a schematic diagram of the structure of the mounting base in the embodiment of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the position limiting support in the embodiment of the utility model;

[0024] Figure 5 A schematic diagram of locking of a locking pin in an embodiment of the utility model;

[0025] Figure 6 It is a schematic diagram of unlocking the locking pin in the embodiment of the utility model.

[0026] The markings in the figure are: 1. Outrigger; 2. Cylinder; 3. Frame; 4. Mounting seat; 4.1. Locking pin barrel; 4.2. Lower panel; 4.3. Middle panel; 4.4. Upper panel; 4.5. Reinforcement block; 4.6. Ring; 5. Limit support; 6. Locking pin; 7. Fixing pin; 8. Limit nylon block; 9. Wedge-shaped nylon block; 10. Limit piece. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0028] Example 1

[0029] This embodiment provides a leg locking device, such as Figure 1 and Figure 2 As shown, it includes a mounting seat 4, a limiting support 5, a locking pin 6, a limiting nylon block 8, a wedge-shaped nylon block 9 and a limiting member 10. The mounting seat 4 and the limiting support 5 are locked or unlocked by the movement of the locking pin 6 and the limiting member 10.

[0030] like Figure 1 and Figure 3 As shown, the mounting seat 4 is fixed to the side of the leg 1. Specifically, the mounting seat 4 includes a locking pin barrel 4.1, a cylinder mounting position, an upper panel 4.4, a lower panel 4.2, an intermediate plate 4.3, and a reinforcing block 4.5.

[0031] Furthermore, the locking pin barrel 4.1 is arranged on one side of the mounting seat 4 and penetrates the mounting seat 4. The upper panel 4.4 and the lower panel 4.2 have locking pin holes on one side of their front ends. The locking pin barrel 4.1 is installed between the upper panel 4.4 and the lower panel 4.2 and communicates with the two locking pin holes.

[0032] Furthermore, the outer wall of the locking pin barrel 4.1 is provided with a limit slot. The limit slot is divided into a non-locking slot, a transverse slot and a locking slot, and the non-locking slot and the locking slot are connected through the transverse slot. In this embodiment, the length of the locking slot is greater than that of the non-locking slot.

[0033] Furthermore, the oil cylinder mounting position is arranged on the other side of the mounting seat 4, and includes an oil cylinder mounting hole and a circular ring 4.6. The other side of the front end of the upper panel 4.4 and the lower panel 4.2 is provided with an oil cylinder mounting hole opposite to each other, and a circular ring 4.6 is installed on the opposite side of the two oil cylinder mounting holes. The oil cylinder mounting position is used to mount one end of the oil cylinder 2 in the crane. By combining the mounting structure of the oil cylinder 2 and the supporting device into a whole, the structural strength of the device is improved, so that it can be applied to cranes with larger tonnage.

[0034] Furthermore, the positions of the oil cylinder mounting hole and the locking pin hole are not fixed and can be changed according to actual conditions. Figure 3 As shown, in this embodiment, the locking pin hole is arranged on the left side, and the cylinder mounting hole is arranged on the right side.

[0035] Furthermore, the middle plate 4.3 is installed between the upper panel 4.4 and the lower panel 4.2, and is close to the leg 1. In this embodiment, the middle plate 4.3 is a bent plate, which can improve the structural strength of the mounting base 4 and further improve its bearing capacity.

[0036] Furthermore, the reinforcing block 4.5 is arranged on one side of the top of the upper panel 4.4 close to the supporting leg 1. In this embodiment, two reinforcing blocks 4.5 are installed, and the reinforcing blocks 4.5 are triangular in shape, so that the structural strength of the mounting base 4 can be further enhanced.

[0037] like Figure 1 and Figure 4 As shown, the limit support 5 is arranged below the mounting seat 4, and a positioning pin hole is arranged on the top of the limit support 5. In the locked state, the lower end of the locking pin 6 extends into the positioning pin hole, thereby locking the limit support 5 and the mounting seat 4.

[0038] Furthermore, the limiting nylon block 8 is installed on the side of the limiting support 5 close to the leg 1, and contacts the side of the leg 1. The limiting nylon block 8 is located between the leg 1 and the limiting support 5, and plays a buffering role to avoid direct contact between the two and cause damage to parts.

[0039] Furthermore, the wedge-shaped nylon block 9 is arranged inside the limit support 5, and the inclined surface of the wedge-shaped nylon block 9 is on the top, and the inclined surface is higher than the limit support 5. The lower surface of the lower panel 4.2 gradually decreases in the direction away from the support leg 1. The inclined surface of the wedge-shaped nylon block 9 cooperates with the lower surface of the lower panel 4.2. The inclined surfaces of the lower panel 4.2 and the wedge-shaped nylon block 9 cooperate with each other, which can limit the relative displacement between the mounting seat 4 and the limit support 5, avoid the relative movement of the two not being in place, and make the locking position more accurate.

[0040] like Figure 2 , Figure 5 and Figure 6 As shown, the locking pin 6 is inserted into the locking pin cylinder 4.1, and the lower end of the locking pin 6 leads to the positioning pin hole. One end of the limiting member 10 is connected to the locking pin 6, and the other end is located in the limiting slot. Specifically, as shown in FIG. Figure 3 As shown, a threaded hole matching with the stopper 10 is formed on the outer surface of the locking pin 6. The threaded hole is exposed through the stopper slot and is threadedly connected with the stopper 10.

[0041] Further, when the limiting member 10 is located at the bottom end of the locking groove, the supporting leg 1 is locked. When the limiting member 10 is located at the non-locking groove, the supporting leg 1 is unlocked.

[0042] Furthermore, the handle of the locking pin 6 is located above the locking pin barrel 4.1. By pulling the handle, the locking pin 6 and the limiting member 10 are driven to move in the limiting through slot to switch between the locked state and the unlocked state.

[0043] Furthermore, the stopper 10 is a screw, a stud or a threaded pin. In this embodiment, a screw is used.

[0044] The specific implementation method of this embodiment is as follows: when the legs 1 are retracted to both sides of the frame 3 and need to be locked, first insert the locking pin 6 into the locking pin barrel 4.1, expose the threaded hole on the surface of the locking pin 6 through the limiting through slot, and then install the screw in the threaded hole on the surface of the locking pin 6. Pull the handle of the locking pin 6 to move the screw along the locking slot to the bottom, and the lower end of the locking pin 6 extends into the positioning pin hole, and the locking is completed. If unlocking is required, pull the handle to move the screw upward along the locking slot to the highest point, and then turn the handle to make the screw continue to move along the horizontal slot until the screw moves to the bottom of the non-locking slot, and the unlocking is completed.

[0045] Example 2

[0046] like Figure 1 As shown, this embodiment provides a crane equipped with the leg locking device in embodiment 1. In this embodiment, a leg locking device is installed at the connection between each leg 1 and the cylinder 2. The crane also includes the cylinder 2 and the frame 3.

[0047] Furthermore, if Figure 2 As shown, one end of the oil cylinder 2 is mounted on the mounting seat 4 through a fixing pin 7 that matches the oil cylinder mounting hole, and the other end is fixed to the frame 3. The mounting structure of the oil cylinder 2 and the supporting device in Example 1 are combined into a whole to improve the structural strength of the supporting device.

[0048] Furthermore, the bottom of the position limiting support 5 is fixed on the upper surface of the frame 3 .

[0049] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0050] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0051] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A leg locking device, characterized in that: It comprises a mounting seat (4), a limiting support (5), a locking pin (6) and a limiting member (10); The mounting seat (4) is fixed to the side of the supporting leg (1), and the mounting seat (4) comprises a locking pin barrel (4.1) and an oil cylinder mounting position; the locking pin barrel (4.1) is arranged on one side of the mounting seat (4) and passes through the mounting seat (4); the oil cylinder mounting position is arranged on the other side of the mounting seat (4); The position limiting support (5) is arranged below the mounting seat (4), and a positioning pin hole is arranged on the top of the position limiting support (5); The outer wall of the locking pin cylinder (4.1) is provided with a limiting through groove; The locking pin (6) is inserted into the locking pin cylinder (4.1), and the lower end of the locking pin (6) is connected to the positioning pin hole; one end of the limiting member (10) is connected to the locking pin (6), and the other end is located in the limiting groove; The mounting seat (4) and the limiting support (5) are locked or unlocked by the movement of the locking pin (6) and the limiting member (10).

2. The leg locking device according to claim 1, characterized in that: The mounting seat (4) further comprises an upper panel (4.4), a lower panel (4.2), an intermediate panel (4.3) and a reinforcing block (4.5); The lower surface of the lower panel (4.2) gradually decreases in a direction away from the supporting leg (1); The middle panel (4.3) is installed between the upper panel (4.4) and the lower panel (4.2) and is close to the supporting leg (1); The upper panel (4.4) and the lower panel (4.2) are provided with locking pin holes on one side of their front ends; The locking pin barrel (4.1) is installed between the upper panel (4.4) and the lower panel (4.2) and is connected to the two locking pin holes; The reinforcing block (4.5) is arranged on one side of the top of the upper panel (4.4) close to the supporting leg (1).

3. The leg locking device according to claim 2, characterized in that: The oil cylinder installation position comprises an oil cylinder installation hole and a circular ring (4.6); Oil cylinder mounting holes are arranged opposite to each other on the other side of the front ends of the upper panel (4.4) and the lower panel (4.2), and circular rings (4.6) are installed on the opposite sides of the two oil cylinder mounting holes.

4. The leg locking device according to claim 2, characterized in that: It also includes a limiting nylon block (8) and a wedge-shaped nylon block (9); The limiting nylon block (8) is installed on a side of the limiting support (5) close to the supporting leg (1) and contacts the side of the supporting leg (1); The wedge-shaped nylon block (9) is arranged inside the limit support (5), the inclined surface of the wedge-shaped nylon block (9) is upward, and the inclined surface is higher than the limit support (5); The inclined surface of the wedge-shaped nylon block (9) matches the lower surface of the lower panel (4.2).

5. The leg locking device according to claim 1, characterized in that: The limit slot is divided into a non-locking slot, a transverse slot and a locking slot, and the non-locking slot and the locking slot are connected through the transverse slot; When the limiting member (10) is located at the bottom end of the locking groove, the supporting leg (1) is locked; When the limiting member (10) is located in the non-locking groove, the supporting leg (1) is unlocked.

6. The leg locking device according to claim 1, characterized in that: The handle of the locking pin (6) is located above the locking pin cylinder (4.1).

7. The leg locking device according to claim 1, characterized in that: A threaded hole matching the limiting member (10) is formed on the outer surface of the locking pin (6); the threaded hole is exposed through the limiting through groove and is threadedly connected to the limiting member (10).

8. The leg locking device according to claim 1, characterized in that: The limiting member (10) is one of a screw, a stud or a threaded pin.

9. A crane, characterized in that: It comprises the outrigger locking device according to any one of claims 1 to 8; and also comprises an oil cylinder (2) and a frame (3); One end of the oil cylinder (2) is mounted on the mounting seat (4) via a fixing pin (7) that matches the oil cylinder mounting hole, and the other end is fixed on the vehicle frame (3).

10. The crane according to claim 9, characterized in that: The bottom of the position-limiting support (5) is fixed on the upper surface of the vehicle frame (3).

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