Novel lorry-mounted crane supporting leg switching device

Abstract

The utility model discloses a novel lorry-mounted crane supporting leg switching device in the field of engineering machinery, which comprises a first support and a second support which are respectively arranged on the left side and the right side, a first valve and a second valve are respectively and fixedly arranged on the first support and the second support, and extending holes are respectively arranged on the first support and the second support. The left end of a rotating rod of the first valve penetrates through an extending hole of the first support and is connected with a first handle rod, the right end of a rotating rod of the second valve penetrates through an extending hole of the second support and is connected with a second handle rod, and a connecting mechanism is arranged between the first valve and the second valve. According to the utility model, the defects of the traditional landing leg switching device are overcome, a group of pull rods and two five-position four-way valves are connected in series, the number of parts is small, the size is small, the weight is light, the loading capacity of the lorry-mounted crane can be improved, and the transportation efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the field of engineering machinery, and in particular relates to a novel outrigger switching device for a truck-mounted crane. Background Art

[0002] In recent years, the market demand for truck-mounted cranes has been growing, which has also accelerated the development of truck-mounted crane products. In terms of the stability and safety of truck-mounted cranes during operation, outriggers play a key role. Before the truck-mounted crane starts operation, the operator selects the outriggers that need to be moved through the outrigger switching device, and then extends the outriggers through the outrigger telescopic operation to improve the stability and safety of the truck-mounted crane during operation; when the operation is completed, the outriggers are retracted through the above operation.

[0003] The outrigger switching device plays an indispensable role in outrigger operation. Most traditional outrigger switching devices adopt a combination of pull rods and multi-way valves, which have the following disadvantages: the multi-way valve has a complex structure, dense pipeline layout, and is difficult to install and maintain, with high costs; the multi-way valve control unit is independent, one valve corresponds to a group of pull rods, the number of parts is large, the entire device is large in size, and the weight is heavy. Utility Model Content

[0004] The purpose of the utility model is to provide a novel outrigger switching device for a truck-mounted crane. In order to solve the defects of the traditional outrigger switching device, a group of pull rods and two five-position four-way valves are connected in series. The number of parts is small, the volume is small, the weight is light, the loading capacity of the truck-mounted crane can be improved, and the transportation efficiency can be improved.

[0005] The purpose of the utility model is achieved as follows: a novel outrigger switching device for a truck-mounted crane comprises a bracket one and a bracket two respectively located on the left and right sides, a valve one and a valve two are respectively fixedly mounted on the bracket one and the bracket two, both the bracket one and the bracket two are provided with extension holes, the left end of the rotary rod of the valve one passes through the extension hole of the bracket one and is connected to the handle rod one, the right end of the rotary rod of the valve two passes through the extension hole of the bracket two and is connected to the handle rod two, and a connecting mechanism is provided between the valve one and the valve two.

[0006] As a further improvement of the utility model, the bracket one and the bracket two are arranged symmetrically, the valve one and the valve two are arranged symmetrically, and the handle rod one and the handle rod two are arranged symmetrically.

[0007] As a further improvement of the present invention, the structures of bracket one and bracket two are the same, and mounting parts are vertically provided on the rear sides of bracket one and bracket two; the structures of valve one and valve two are the same, and the rotary rod of valve one and the rotary rod of valve two are both valve rods; the structures of handle rod one and handle rod two are the same, and one end of handle rod one and handle rod two are fixed to the corresponding rotary rod, and the other end of handle rod one and handle rod two extend upward.

[0008] As a further improvement of the utility model, the extension hole is a waist-shaped hole.

[0009] As a further improvement of the utility model, the connecting mechanism includes a universal joint connected to the right end of the rotating rod of valve one, the other end of the universal joint is connected to the pull rod, the other end of the pull rod is connected to the adjusting stud, a thin nut is provided on the adjusting stud to tighten the end surface of the pull rod, the other end of the adjusting stud is connected to the connecting sleeve, and the other end of the connecting sleeve is fixed to the left end of the rotating rod of valve two.

[0010] As a further improvement of the utility model, the pull rod includes a rod sleeve, and a left rod head and a right rod head are respectively fixed to the left and right ends of the rod sleeve.

[0011] As a further improvement of the present invention, both valve one and valve two are five-position four-way valves.

[0012] The utility model has a through hole radially opened on the left side of the universal joint, an internal thread hole opened on the right side of the pull rod, an external thread on the left side of the adjusting stud, an internal thread hole opened on the right side of the adjusting stud, the internal thread on the right side of the adjusting stud is left-handed, the left side of the connecting sleeve is externally threaded, the external thread on the left side of the connecting sleeve is left-handed, a hole is opened on the right side of the connecting sleeve, and a through hole is radially opened on the right side of the connecting sleeve. During installation, the upper rod head of the handle rod is embedded in the left side rotating rod hole of the five-position four-way valve, the right side rotating rod of the five-position four-way valve is embedded in the left side hole, the left side rod head of the pull rod is embedded in the right side hole of the universal joint, the left side screw of the adjusting stud is embedded in the right side threaded hole of the pull rod, the left side screw of the connecting sleeve is embedded in the right side threaded hole of the adjusting stud, the left side rotating rod of the five-position four-way valve is embedded in the right side hole of the connecting sleeve, and the upper side rod head of the handle rod is embedded in the right side rotating rod hole of the five-position four-way valve. During assembly, the middle valve block of the five-position four-way valve is connected to the right side of the bracket through a bolt pair, the upper rod head of the handle rod is fixed to the left side rotary rod hole of the five-position four-way valve through a set screw, the right side rotary rod of the five-position four-way valve is connected to the left side hole of the universal joint through a bolt pair, the left side rod head of the pull rod is fixed to the right side hole of the universal joint through a set screw, the left side screw of the adjusting stud is connected to the right side threaded hole of the pull rod through a threaded connection, the left side screw of the connecting sleeve is connected to the right side threaded hole of the adjusting stud through a threaded connection, the left side rotary rod of the five-position four-way valve two is connected to the right side smooth hole of the connecting sleeve through a bolt pair, the middle valve block of the five-position four-way valve two is connected to the left side of the bracket two through a bolt pair, and the upper side rod head of the handle rod two is fixed to the right side rotary rod hole of the five-position four-way valve two through a set screw.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the combination of a pull rod and a five-position four-way valve is adopted, the structure is simple and compact, the installation and maintenance are convenient, and the cost is low; a set of pull rods and two five-position four-way valves are connected in series, the number of parts is small, the volume is small, and the weight is light, which can improve the loading capacity of the truck crane and improve the transportation efficiency. The utility model is installed on the truck crane, and the truck crane provides the installation interface, power source and remote control of various functions for the outrigger switching device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is a front view of the universal joint in the utility model.

[0016] Figure 3 It is a cutaway view of the universal joint in the utility model.

[0017] Figure 4 It is a cutaway view of the pull rod in the utility model.

[0018] Figure 5 It is a cutaway view of the adjusting stud in the utility model.

[0019] Figure 6 It is a cutaway view of the connecting sleeve in the utility model.

[0020] Among them: 1 bracket one, 2 handle rod one, 3 valve one, 4 universal joint, 5 pull rod, 5a rod sleeve, 5b left rod head, 5c right rod head, 6 adjustment stud, 7 connecting sleeve, 8 thin nut, 9 bracket two, 10 handle rod two, 11 valve two, 12 rotary rod, 13 installation part. DETAILED DESCRIPTION

[0021] like Figure 1-6 As shown, a new type of outrigger switching device for a truck-mounted crane comprises a bracket 1 and a bracket 2 9 respectively located on the left and right sides, a valve 3 and a valve 2 11 are respectively fixedly mounted on the bracket 1 and the bracket 2 9, and both the bracket 1 and the bracket 2 9 are provided with extension holes, which are waist-shaped holes; the left end of the rotary rod 12 of the valve 1 3 passes through the extension hole of the bracket 1 and is connected to the handle rod 1 2, and the right end of the rotary rod of the valve 2 11 passes through the extension hole of the bracket 2 9 and is connected to the handle rod 2 10, and the bracket 1 and the bracket 2 9 are symmetrically arranged on the left and right sides. The valve 1 3 and the valve 2 11 are symmetrically arranged, and the handle rod 1 2 and the handle rod 2 10 are symmetrically arranged; the structure of the bracket 1 and the bracket 2 9 is the same, and the rear of the bracket 1 and the bracket 2 9 is vertically provided with a mounting portion 13; the structure of the valve 1 3 and the valve 2 11 is the same, and the rotary rod of the valve 1 3 and the rotary rod of the valve 2 11 are both valve rods; the structure of the handle rod 1 2 and the handle rod 2 10 is the same, and one end of the handle rod 1 2 and the handle rod 2 10 is fixed to the corresponding rotary rod, and the other end of the handle rod 1 2 and the handle rod 2 10 extends upward. A connecting mechanism is provided between the valve 1 3 and the valve 2 11.

[0022] The connecting mechanism includes a universal joint 4 connected to the right end of the rotating rod of valve one 3, the other end of the universal joint 4 is connected to the pull rod 5, the pull rod 5 includes a rod sleeve 5a, and the left and right ends of the rod sleeve 5a are respectively fixed with a left rod head 5b and a right rod head 5c; the other end of the pull rod 5 is connected to an adjusting stud 6, and a thin nut 8 is sleeved on the adjusting stud 6 to clamp the end surface of the pull rod 5, the other end of the adjusting stud 6 is connected to a connecting sleeve 7, and the other end of the connecting sleeve 7 is fixed to the left end of the rotating rod of valve two 11.

[0023] Valve one 3 and valve two 11 are both five-position four-way valves.

[0024] The utility model has a through hole radially opened on the left side of the universal joint 4, an internal thread hole opened on the right side of the tie rod 5, an external thread on the left side of the adjusting stud 6, an internal thread hole opened on the right side of the adjusting stud 6, the internal thread on the right side of the adjusting stud 6 is left-handed, an external thread on the left side of the connecting sleeve 7, a left external thread on the left side of the connecting sleeve 7 is left-handed, a hole is opened on the right side of the connecting sleeve 7, and a through hole radially opened on the right side of the connecting sleeve 7. During installation, the upper rod head of the handle rod 1 2 is embedded in the left side rotating rod hole of the valve 1 3, the right side rotating rod of the valve 1 3 is embedded in the left side hole, the left side rod head of the tie rod 5 is embedded in the right side hole of the universal joint 4, the left side screw of the adjusting stud 6 is embedded in the right side threaded hole of the tie rod 5, the left side screw of the connecting sleeve 7 is embedded in the right side threaded hole of the adjusting stud 6, the left side rotating rod of the valve 2 11 is embedded in the right side hole of the connecting sleeve 7, and the upper side rod head of the handle rod 2 10 is embedded in the right side rotating rod hole of the valve 2 11. During assembly, the middle valve block of valve 13 is connected to the right side of bracket 1 by a bolt pair, the upper rod head of handle rod 2 is fixed to the left side rotary rod hole of valve 13 by a set screw, the right side rotary rod of valve 13 is connected to the left side hole of universal joint 4 by a bolt pair, the left side rod head of pull rod 5 is fixed to the right side hole of universal joint 4 by a set screw, the left side screw rod of adjusting stud 6 is connected to the right side threaded hole of pull rod 5 by threading, the left side screw rod of connecting sleeve 7 is connected to the right side threaded hole of adjusting stud 6 by threading, the left side rotary rod of valve 2 11 is connected to the right side smooth hole of connecting sleeve 7 by a bolt pair, the middle valve block of valve 2 11 is connected to the left side of bracket 2 9 by a bolt pair, and the upper side rod head of handle rod 2 10 is fixed to the right side rotary rod hole of valve 2 11 by a set screw.

[0025] The working principle of the utility model is as follows: 1. The device is installed on the truck crane, and the power source, control and truck crane are integrated to realize the same power source and remote centralized control. 2. Through the universal joint 4, the variable angle torque transmission caused by processing error is realized; through the adjustment stud 6, the installation adjustment in the horizontal direction is realized; through the thin nut 8, the pull rod 5 and the adjustment stud 6 are locked; by turning the handle bar on one side, the handle bar on the other side is rotated synchronously. 3. The truck crane has the function of retracting the front and rear outriggers. When using it, first select the working outrigger by turning the handle bar, and then extend and retract the outrigger through remote control.

[0026] The utility model has the following advantages: a combination of a pull rod 5 and a five-position four-way valve is adopted, the structure is simple and compact, installation and maintenance are convenient, and the cost is low; a group of pull rods 5 and two five-position four-way valves are connected in series, the number of parts is small, the volume is small, the weight is light, the loading capacity of the truck crane can be improved, and the transportation efficiency can be improved.

[0027] The present utility model is not limited to the above-mentioned embodiments. On the basis of the technical solution disclosed in the present utility model, technicians in this field can make some substitutions and deformations to some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present utility model.

Claims

1. A new type of outrigger switching device for a truck-mounted crane, characterized in that: It includes a bracket 1 and a bracket 2 respectively located on the left and right sides, and a valve 1 and a valve 2 are fixedly installed on the bracket 1 and the bracket 2 respectively. Both the bracket 1 and the bracket 2 are provided with extension holes. The left end of the rotary rod of the valve 1 passes through the extension hole of the bracket 1 and is connected to the handle rod 1, and the right end of the rotary rod of the valve 2 passes through the extension hole of the bracket 2 and is connected to the handle rod 2. A connecting mechanism is provided between the valve 1 and the valve 2.

2. The novel outrigger switching device for a truck-mounted crane according to claim 1 is characterized in that: The bracket 1 and the bracket 2 are arranged symmetrically on the left and right, the valve 1 and the valve 2 are arranged symmetrically on the left and right, and the handle rod 1 and the handle rod 2 are arranged symmetrically on the left and right.

3. A novel outrigger switching device for a truck-mounted crane according to claim 1 or 2, characterized in that: The structures of bracket one and bracket two are the same, and mounting parts are vertically provided on the rear sides of bracket one and bracket two; the structures of valve one and valve two are the same, and the rotary rod of valve one and the rotary rod of valve two are both valve rods; the structures of handle rod one and handle rod two are the same, and one end of handle rod one and handle rod two is fixed to the corresponding rotary rod, and the other end of handle rod one and handle rod two extends upward.

4. A novel outrigger switching device for a truck-mounted crane according to claim 1 or 2, characterized in that: The extending hole is a waist-shaped hole.

5. A novel outrigger switching device for a truck-mounted crane according to claim 1 or 2, characterized in that: The connecting mechanism includes a universal joint connected to the right end of the rotating rod of valve one, the other end of the universal joint is connected to the pull rod, the other end of the pull rod is connected to the adjusting stud, a thin nut is provided on the adjusting stud to tighten the end surface of the pull rod, the other end of the adjusting stud is connected to the connecting sleeve, and the other end of the connecting sleeve is fixed to the left end of the rotating rod of valve two.

6. The novel outrigger switching device for a truck-mounted crane according to claim 5 is characterized in that: The pull rod comprises a rod sleeve, and a left rod head and a right rod head are respectively fixed to the left and right ends of the rod sleeve.

7. A novel outrigger switching device for a truck-mounted crane according to claim 1 or 2, characterized in that: The valve 1 and the valve 2 are both five-position four-way valves.

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