Arm support for overhead working truck

Abstract

The utility model discloses a cantilever crane for an overhead working truck, which belongs to the field of vehicle cantilever cranes and comprises a vehicle cantilever crane body, a main base is fixedly connected to the upper end of the vehicle cantilever crane body, a main supporting frame is rotatably connected to the upper end of the main base, and a main rotating shaft part is mounted between the main supporting frame and the main base. A liquid storage cavity is formed in the inner end of the main supporting frame, liquid separation channels are symmetrically formed in the left end and the right end of the liquid storage cavity, protruding inner blocks are symmetrically and fixedly connected to the left inner wall and the right inner wall of each liquid separation channel, pressure elastic pieces are fixedly connected to the lower ends of the protruding inner blocks, and sponge contact blocks are fixedly connected to the lower ends of the two pressure elastic pieces. According to the scheme, by arranging the lubricating mechanism, direct friction between metal can be effectively reduced through a lubricant in the lubricating mechanism, the abrasion rate is reduced, long-term stable operation of the main supporting frame is guaranteed, and the overall economic benefit of the vehicle arm frame body is improved.

Description

Technical Field

[0001] The utility model relates to the field of vehicle booms, and more specifically, to a boom for an aerial work vehicle. Background Art

[0002] The boom of an aerial work vehicle is a key component, supporting, extending, and positioning the work platform during aerial work. The various segments of the boom are connected by shafts and joints. The shaft is the key component that enables the boom to rotate relative to the ground and is typically made of high-strength metal materials, such as high-quality alloy steel, to withstand significant bending and torque moments.

[0003] When the boom is extended, the connection of the rotating shaft is subjected to a large relative motion friction. Without good lubrication, this friction will consume a lot of energy. During the frequent extension and contraction of the boom, the friction at the connection of the rotating shaft will cause wear of the metal surface. Long-term wear will reduce the matching accuracy of the rotating shaft and increase the gap, thereby affecting the movement stability and reliability of the boom. Therefore, it is necessary to design a boom for aerial work vehicles with a self-lubricating structure to solve the above problems. Utility Model Content

[0004] 1. Technical problems to be solved

[0005] In response to the problems existing in the prior art, the purpose of the present utility model is to provide an aerial work vehicle boom. This solution sets up a lubrication mechanism, and the lubricant inside the mechanism can effectively reduce the direct friction between metals, reduce the wear rate, ensure the long-term stable operation of the main support frame, and improve the overall economic benefits of the vehicle boom body.

[0006] 2. Technical solution

[0007] In order to solve the above problems, the present invention adopts the following technical solutions.

[0008] A boom for an aerial work vehicle comprises a vehicle boom body, the upper end of the vehicle boom body is fixedly connected to a main base, the upper end of the main base is rotatably connected to a main support frame, a main rotating shaft is installed between the main support frame and the main base, a liquid storage cavity is opened at the inner end of the main support frame, liquid separation channels are symmetrically opened at the left and right ends of the liquid storage cavity, protruding inner blocks are symmetrically fixedly connected to the left and right inner walls of the liquid separation channel, the lower ends of the protruding inner blocks are fixedly connected to pressure elastic parts, the lower ends of the two pressure elastic parts are fixedly connected to sponge contact blocks, the sponge contact blocks are located directly above the connection between the main rotating shaft and the main support frame, a one-way solenoid valve is provided at one end of the liquid separation channel close to the liquid storage cavity, the inner end of the liquid storage cavity is filled with a plurality of lubricating liquids, and the lubricating liquid extends to the connection surface of the main rotating shaft and the main support frame.

[0009] Furthermore, a pair of inclined liquid-conducting bottom plates are fixedly connected to the lower inner wall of the liquid storage cavity, and the two inclined liquid-conducting bottom plates are symmetrically arranged in the liquid storage cavity.

[0010] Furthermore, a liquid level sensor is fixedly connected above the ends of the two inclined liquid-guiding bottom plates that are close to each other.

[0011] Furthermore, the liquid level sensor cooperates with the lubricating oil, and the liquid level sensor is externally connected to a control terminal.

[0012] Furthermore, a fluid infusion port is provided at the front end of the main support frame, and the fluid infusion port is communicated with the fluid storage cavity.

[0013] Furthermore, the front end of the main support frame is fixedly connected to the component load-bearing frame, and the inner end of the main base is rotatably connected to the hydraulic push rod.

[0014] Furthermore, the output end of the hydraulic push rod is movably connected to the force-sharing frame, and a working basket is installed at one end of the main support frame away from the vehicle arm body.

[0015] 3. Beneficial effects

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] (1) In this solution, a liquid storage cavity can be set inside the main support frame at the connection between the main rotating shaft outside the main base and the force-bearing frame. The liquid storage cavity is filled with a certain amount of lubricating liquid in advance, and the one-way solenoid valve is opened when the vehicle arm body is started. The lubricating oil is introduced into the liquid separation channel and is soaked with the lubricating oil through the sponge contact block. The sponge contact block fits tightly to the contact surface between the main rotating shaft and the main support frame. By setting up a lubricating mechanism, the lubricant inside can effectively reduce the direct friction between the metals, reduce the wear rate, ensure the long-term stable operation of the main support frame, and improve the overall economic benefits of the vehicle arm body.

[0018] (2) At the same time, two symmetrical inclined liquid guide bottom plates are set on the lower inner wall of the liquid storage cavity. The two inclined liquid guide bottom plates can accurately guide the lubricating oil into the two liquid separation channels, and it is not easy to produce residual dead corners.

[0019] (3) Liquid level sensors are set at the top positions of the two inclined liquid-guiding bottom plates. When the liquid level sensors are in contact with the lubricating oil, when the main support frame is in a vertical state, the external control terminal can be used to detect whether the liquid level sensor detector is covered by the lubricating oil. When the liquid level in the liquid storage cavity drops to the bottom position of the liquid level sensor, the external control terminal can send a refilling signal to the staff. The staff opens the refilling port to refill the liquid storage cavity, thereby ensuring the smooth operation of the lubrication mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the axial side structure of the vehicle arm support body of the present utility model;

[0021] Figure 2 For the utility model Figure 1 A partially truncated and enlarged schematic diagram of the structure of the middle main support frame;

[0022] Figure 3 This is a schematic diagram of the front cross-sectional structure of the main support frame of the present invention;

[0023] Figure 4 For the utility model Figure 3 Schematic diagram of the partially truncated and enlarged structure of the liquid storage cavity.

[0024] Description of the numbers in the figure:

[0025] 1. Vehicle arm body; 2. Main base; 3. Hydraulic push rod; 4. Main support frame; 5. Work basket; 6. Main rotating shaft; 7. Force-sharing frame; 8. Liquid storage cavity; 9. Inclined liquid guide bottom plate; 10. Liquid level sensor; 11. Liquid separation channel; 12. Protruding inner block; 13. Pressure elastic part; 14. Sponge contact block; 15. One-way solenoid valve; 16. Liquid filling port. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean 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 an indirect connection through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0029] See also Figure 1-4 , a boom for an aerial work vehicle, including a vehicle boom body 1, the upper end of the vehicle boom body 1 is fixedly connected to the main base 2, the upper end of the main base 2 is rotatably connected to the main support frame 4, and a main rotating shaft 6 is installed between the main support frame 4 and the main base 2. The inner end of the main support frame 4 is provided with a liquid storage cavity 8, and the left and right ends of the liquid storage cavity 8 are symmetrically provided with liquid separation channels 11. The left and right inner walls of the liquid separation channel 11 are symmetrically fixedly connected with protruding inner blocks 12, and the lower ends of the protruding inner blocks 12 are fixedly connected to pressure elastic members 13, and the lower ends of the two pressure elastic members 13 are fixedly connected with sponge contact blocks 14, which are located just above the connection between the main rotating shaft 6 and the main support frame 4. A one-way solenoid valve 15 is provided at one end of the liquid separation channel 11 near the liquid storage cavity 8, and the inner end of the liquid storage cavity 8 is filled with a plurality of lubricating liquids, which extend to the connection surface of the main rotating shaft 6 and the main support frame 4.

[0030] See also Figure 1-4 A pair of inclined liquid-guiding bottom plates 9 are fixedly connected to the lower inner wall of the liquid storage cavity 8. The two inclined liquid-guiding bottom plates 9 are symmetrically arranged in the liquid storage cavity 8. A liquid level sensor 10 is fixedly connected to the upper end of the two inclined liquid-guiding bottom plates 9 close to each other. The liquid level sensor 10 cooperates with the lubricating oil. The liquid level sensor 10 is externally connected to the control terminal. A liquid replenishing port 16 is provided at the front end of the main support frame 4. The liquid replenishing port 16 is communicated with the liquid storage cavity 8. The front end of the main support frame 4 is fixedly connected to the component load-bearing frame 7, and the inner end of the main base 2 is rotatably connected to the hydraulic push rod 3. The output end of the hydraulic push rod 3 is movably connected to the component load-bearing frame 7. The end of the main support frame 4 away from the vehicle arm body 1 is installed with a working vehicle basket 5.

[0031] See also Figure 1-4When the present invention is in operation, the operating handle connected to the vehicle arm frame body 1 can be slowly pushed to drive the hydraulic push rod 3 to operate so that the main support frame 4 can be deformed smoothly, and a liquid storage cavity 8 can be provided in the main support frame 4 at the connection between the main rotating shaft 6 outside the main base 2 and the force-bearing frame 7. The liquid storage cavity 8 is filled with a certain amount of lubricating liquid in advance, and the one-way solenoid valve 15 is opened when the vehicle arm frame body 1 is started, and the lubricating oil is introduced into the liquid separation channel 11 and is soaked with the lubricating oil through the sponge contact block 14. The sponge contact block 14 fits tightly against the contact surface between the main rotating shaft 6 and the main support frame 4, and the oil is evenly squeezed out at the connection point between the main rotating shaft 6 and the main support frame 4 through the extrusion force of the pressure elastic member 13, and the lubricating oil is arranged in the range around the connection surface between the main rotating shaft 6 and the main support frame 4 as the main support frame 4 rotates, and a thin oil film is formed in this range to separate the metal surfaces that were originally in direct contact. By setting a lubrication mechanism The lubricant can effectively reduce the direct friction between metals, reduce the wear rate, ensure the long-term stable operation of the main support frame 4, and improve the overall economic benefits of the vehicle arm body 1. At the same time, two symmetrical inclined liquid guiding bottom plates 9 are arranged on the lower inner wall of the liquid storage cavity 8. The two inclined liquid guiding bottom plates 9 can accurately guide the lubricating oil into the two liquid separation channels 11, and it is not easy to produce residual dead corners. At the same time, a liquid level sensor 10 is arranged at the top position of the two inclined liquid guiding bottom plates 9. When the liquid level sensor 10 is in contact with the lubricating oil, when the main support frame 4 is in a vertical state, the external control terminal can be used to detect whether the liquid level sensor 10 is covered by the lubricating oil. When the liquid level in the liquid storage cavity 8 drops to the bottom position of the liquid level sensor 10, the external control terminal can send a refilling signal to the staff, and the staff can open the refilling port 16 to refill the liquid storage cavity 8, thereby ensuring the smooth operation of the lubrication mechanism.

[0032] The above are only preferred embodiments of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed in the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A boom for an aerial work vehicle, comprising a vehicle boom body (1), characterized in that: The upper end of the vehicle arm frame body (1) is fixedly connected to the main base (2), the upper end of the main base (2) is rotatably connected to the main support frame (4), a main rotating shaft (6) is installed between the main support frame (4) and the main base (2), the inner end of the main support frame (4) is provided with a liquid storage cavity (8), the left and right ends of the liquid storage cavity (8) are symmetrically provided with liquid separation channels (11), the left and right inner walls of the liquid separation channel (11) are symmetrically fixedly connected with protruding inner blocks (12), the protruding inner blocks (12) are provided with a plurality of protruding inner blocks (11) and a plurality of protruding inner blocks (12) are provided. 2) is fixedly connected to a pressure elastic member (13) at its lower end, and a sponge contact block (14) is fixedly connected to the lower ends of the two pressure elastic members (13), and the sponge contact block (14) is located directly above the connection between the main rotating shaft member (6) and the main support frame (4), and a one-way solenoid valve (15) is provided at one end of the liquid separation channel (11) close to the liquid storage cavity (8), and the inner end of the liquid storage cavity (8) is filled with a plurality of lubricating liquids, and the lubricating liquids extend to the connection surface between the main rotating shaft member (6) and the main support frame (4).

2. The boom for an aerial work vehicle according to claim 1, characterized in that: A pair of inclined liquid-conducting bottom plates (9) are fixedly connected to the lower inner wall of the liquid storage cavity (8), and the two inclined liquid-conducting bottom plates (9) are symmetrically arranged in the liquid storage cavity (8).

3. The boom for an aerial work vehicle according to claim 2, characterized in that: A liquid level sensor (10) is fixedly connected above the ends of the two inclined liquid-conducting bottom plates (9) that are close to each other.

4. The boom for an aerial work vehicle according to claim 3, characterized in that: The liquid level sensor (10) cooperates with the lubricating oil, and the liquid level sensor (10) is externally connected to a control terminal.

5. The boom for an aerial work vehicle according to claim 1, characterized in that: A liquid infusion port (16) is provided at the front end of the main support frame (4), and the liquid infusion port (16) is in communication with the liquid storage cavity (8).

6. The boom for an aerial work vehicle according to claim 1, characterized in that: The front end of the main support frame (4) is fixedly connected to a force-sharing frame (7), and the inner end of the main base (2) is rotatably connected to a hydraulic push rod (3).

7. The boom for an aerial work vehicle according to claim 6, characterized in that: The output end of the hydraulic push rod (3) is movably connected to the force-sharing frame (7), and an operating basket (5) is installed at one end of the main support frame (4) away from the vehicle arm frame body (1).

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