Crane telescopic arm protection device
By designing a protective device combining protective arm, hydraulic cylinder and auxiliary ring on the crane telescopic arm, the telescopic arm is solved by insufficient strength and local overload caused by the hollow structure of the telescopic arm, achieving higher service life and safety.
Patent Information
- Application Number
- CN202520699009.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-15
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2035-04-15
AI Technical Summary
Due to the hollow structure of the socket, the existing telescopic arms have poor overall strength and are prone to local overload and deformation when they bear large loads, which reduces their service life and poses safety hazards.
A crane telescopic arm protection device is designed, and by providing a protective arm, hydraulic cylinder and auxiliary ring to cooperate, an upward tension is provided to the telescopic arm, reducing the load load of the main arm and telescopic arm, and preventing local overload and deformation.
It effectively reduces the load load of the main arm and telescopic arm, reduces the deformation safety hazards caused by local overload, improves service life, and ensures the protection effect of the auxiliary ring, protective arm and hydraulic cylinder on the main arm and telescopic arm.
Smart Images
Figure CN222892939U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cranes, in particular to a crane telescopic arm protection device. Background Art
[0002] The boom is a very important device on the crane. The boom is commonly known as the jib or the boom. It is a bidirectional bent metal structure that supports the lifting rope, the picking device or the luffing trolley. It is supported on the turntable or tower of the crane by connecting pins, wire ropes or hydraulic cylinders. For the boom that can pitch and swing, the luffing mechanism changes its inclination angle to change the amplitude and lifting height of the crane; the horizontal boom changes its amplitude by the luffing trolley moving back and forth on it. According to the structure, it is divided into a truss boom and a box-type boom; according to the function, it is divided into a crane boom, a main boom, a secondary boom, a telescopic boom, a folding boom, a goosebump, etc.
[0003] The telescopic arm is the main load-bearing component of the crane. In order to meet the needs of telescopic expansion and contraction, some existing telescopic arms are usually hollow structures. This results in poor overall strength of the telescopic arm. When it is subjected to a large load, local overloads are prone to occur, causing the telescopic arm to deform easily. This not only reduces the service life of the telescopic arm, but also poses certain safety hazards. Utility Model Content
[0004] The purpose of the utility model is to overcome the shortcomings that some existing telescopic arms are usually hollow structures in order to meet the needs of telescopic movement, which leads to poor overall strength of the telescopic arms. Local overloads are prone to occur when the telescopic arms are subjected to heavy loads, causing deformation of the telescopic arms. This not only reduces the service life of the telescopic arms, but also poses certain safety hazards. A protective device for the telescopic arms of a crane is provided.
[0005] The purpose of the utility model is achieved through the following technical solutions: a crane telescopic arm protection device, comprising a main support frame, a main arm is installed on the main support frame, a telescopic arm that can be telescoped along the main arm is installed on the main arm, an auxiliary ring is sleeved on the telescopic arm, a protection arm is installed on the main support frame, the protection arm is located above the main arm, a rotatable hydraulic cylinder is installed at one end of the protection arm, and the telescopic end of the hydraulic cylinder is rotatably connected to the auxiliary ring; by arranging the protection arm, the hydraulic cylinder and the auxiliary ring, an upward pulling force can be provided to the telescopic arm, thereby effectively reducing the load of the main arm and the telescopic arm, reducing the safety hazard of deformation of the main arm and the telescopic arm due to local overload, and effectively improving the service life of the main arm and the telescopic arm.
[0006] A first guide block and a second guide block are respectively installed on the telescopic arm, and the first guide block and the second guide block are both arranged on both sides of the telescopic arm, and the first guide block is located at the front end of the telescopic end of the telescopic arm, the first guide block is slidably connected with the auxiliary ring, the outer diameter of the first guide block is the same as the inner diameter of the auxiliary ring, the outer diameter of the second guide block is larger than the inner diameter of the auxiliary ring, and a first stroke switch corresponding to the second guide block is installed on the side of the auxiliary ring close to the second guide block, and the front end of the second guide block is used to trigger the first stroke switch on the auxiliary ring, the first stroke switch is electrically connected to the hydraulic cylinder, and a second stroke switch corresponding to the main arm is installed on the side of the auxiliary ring close to the main arm, and the second stroke switch is electrically connected to the hydraulic cylinder, and the first stroke switch is set so that when the second guide block contacts the first stroke switch, the second guide block triggers the first stroke switch to control the hydraulic cylinder to extend and drive The auxiliary ring and the telescopic arm extend synchronously, so that after the telescopic arm is extended to a certain length, the auxiliary ring can extend synchronously, ensuring that the auxiliary ring can stably provide pulling force to the telescopic arm, ensuring the protective effect of the auxiliary ring, protective arm and hydraulic cylinder on the main arm and the telescopic arm. At the same time, a second stroke switch is set so that when the second stroke switch contacts the main arm and reaches the reset position during the contraction of the auxiliary ring, the hydraulic cylinder stops contracting to avoid equipment failure. The outer diameter of the first guide block is set to be the same as the inner diameter of the auxiliary ring, and the outer diameter of the second guide block is larger than the inner diameter of the auxiliary ring, so that the auxiliary ring can remain stationary when the front end of the telescopic arm moves, and when the second guide block moves out of the main arm, the first stroke switch on the auxiliary ring can be triggered, so that when the extended length of the telescopic arm reaches a certain length, the auxiliary ring is triggered to move, so that the auxiliary ring can move according to the extended length of the telescopic arm.
[0007] A further technical solution is that a second hydraulic cylinder is installed in the main arm, the telescopic end of the second hydraulic cylinder is connected to the telescopic arm, and the second hydraulic cylinder is provided to control the extension and contraction of the telescopic arm on the main arm.
[0008] A further technical solution is that a guide groove is provided on the inner wall of the main arm, and the first guide block and the second guide block are both slidably connected to the guide groove. The guide groove is provided to increase the contact area between the telescopic arm and the inner wall of the main arm, thereby increasing the strength between the main arm and the telescopic arm, and at the same time ensuring the stability of the telescopic arm moving inside the main arm.
[0009] A further technical solution is that a lower support frame is installed on the main support frame, the lower support frame is located at the lower part of the main arm, and both ends of the lower support frame are respectively connected to the main support frame and the main arm. By setting the lower support frame to support the lower part of the main arm, the strength of the main arm is further improved.
[0010] A further technical solution is that a groove is opened on the side of the auxiliary ring close to the main arm, and the first travel switch and the second travel switch are both installed in the groove. The first travel switch and the second travel switch are arranged in the groove, so that the first travel switch and the second travel switch can be prevented from being exposed to the external environment, thereby protecting the first travel switch and the second travel switch and improving the service life of the first travel switch and the second travel switch.
[0011] A further technical solution is that the size of the groove is adapted to the main arm. Setting the size of the groove to be adapted to the main arm enables the groove on the auxiliary ring to seal one end of the main arm, thereby preventing impurities in the external environment from entering the main arm and sealing the main arm.
[0012] The utility model has the following advantages: the utility model can provide an upward pulling force to the telescopic arm by setting a protective arm, a hydraulic cylinder and an auxiliary ring, thereby effectively reducing the load of the main arm and the telescopic arm, reducing the safety hazard of deformation of the main arm and the telescopic arm due to local overload, and effectively improving the service life of the main arm and the telescopic arm. The first stroke switch is set so that when the second guide block contacts the first stroke switch, the second guide block triggers the first stroke switch to control the extension of the hydraulic cylinder to drive the auxiliary ring and the telescopic arm to extend synchronously, so that after the telescopic arm is extended to a certain length, the auxiliary ring can be extended synchronously to ensure that the auxiliary ring can stably provide pulling force to the telescopic arm, thereby ensuring the protective effect of the auxiliary ring, the protective arm and the hydraulic cylinder on the main arm and the telescopic arm. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0014] Figure 2 It is a top view schematic diagram of the cross-sectional structure of the main arm of the utility model;
[0015] Figure 3 For the utility model Figure 2 A magnified schematic diagram of the structure in the middle;
[0016] Figure 4 This is a schematic diagram of the telescopic arm of the utility model in a retracted state;
[0017] In the figure, 1. main support frame; 2. main arm; 3. telescopic arm; 4. auxiliary ring; 5. protection arm; 6. hydraulic cylinder; 7. first guide block; 8. second guide block; 9. groove; 10. lower support frame; 11. second hydraulic cylinder; 12. guide groove; 13. first travel switch; 14. second travel switch. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme 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. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.
[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.
[0020] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.
[0021] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0022] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, or the positions or positional relationships commonly understood by those skilled in the art, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply 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 to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 indirectly connected 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 according to specific circumstances.
[0024] like Figure 1~Figure 4As shown, a crane telescopic arm protection device comprises a main support frame 1, a main arm 2 is installed on the main support frame 1, a telescopic arm 3 which can be telescoped along the main arm 2 is installed on the main arm 2, an auxiliary ring 4 is sleeved on the telescopic arm 3, a protection arm 5 is installed on the main support frame 1, the protection arm 5 is located above the main arm 2, a rotatable hydraulic cylinder 6 is installed at one end of the protection arm 5, and the telescopic end of the hydraulic cylinder 6 is rotatably connected to the auxiliary ring 4; by arranging the protection arm 5, the hydraulic cylinder 6 and the auxiliary ring 4, an upward pulling force can be provided to the telescopic arm 3, thereby effectively reducing the load of the main arm 2 and the telescopic arm 3, reducing the safety hazard of deformation of the main arm 2 and the telescopic arm 3 due to local overload, and effectively improving the service life of the main arm 2 and the telescopic arm 3.
[0025] The telescopic arm 3 is respectively provided with a first guide block 7 and a second guide block 8, the first guide block 7 and the second guide block 8 are both arranged on both sides of the telescopic arm 3, and the first guide block 7 is located at the front end of the telescopic end of the telescopic arm 3, the first guide block 7 is slidably connected with the auxiliary ring 4, the outer diameter of the first guide block 7 is the same as the inner diameter of the auxiliary ring 4, the outer diameter of the second guide block 8 is larger than the inner diameter of the auxiliary ring 4, a first travel switch 13 corresponding to the second guide block 8 is installed on the side of the auxiliary ring 4 close to the second guide block 8, the front end of the second guide block 8 is used to trigger the first travel switch 13 on the auxiliary ring 4, the first travel switch 13 is electrically connected to the hydraulic cylinder 6, and a second travel switch corresponding to the main arm 2 is installed on the side of the auxiliary ring 4 close to the main arm 2 The second travel switch 14 is electrically connected to the hydraulic cylinder 6. The first travel switch 13 is set so that when the second guide block 8 contacts the first travel switch 13, the second guide block 8 triggers the first travel switch 13 to control the extension of the hydraulic cylinder 6 to drive the auxiliary ring 4 and the telescopic arm 3 to extend synchronously, so that after the telescopic arm 3 is extended to a certain length, the auxiliary ring 4 can be extended synchronously to ensure that the auxiliary ring 4 stably provides tension to the telescopic arm 3, and ensures the protective effect of the auxiliary ring 4, the protective arm 5 and the hydraulic cylinder 6 on the main arm 2 and the telescopic arm 3. At the same time, the second travel switch 14 is set so that when the second travel switch 14 contacts the main arm 2 and reaches the reset position during the contraction of the auxiliary ring 4, the hydraulic cylinder 6 stops contracting to avoid equipment failure;
[0026] The outer diameter of the first guide block 7 is the same as the inner diameter of the auxiliary ring 4, and the outer diameter of the second guide block 8 is larger than the inner diameter of the auxiliary ring 4, which can keep the auxiliary ring 4 stationary when the front end of the telescopic arm 3 moves; when the second guide block 8 moves out of the main arm 2, it can trigger the first travel switch 13 on the auxiliary ring 4, so that when the extended length of the telescopic arm 3 reaches a certain value, the auxiliary ring 4 is triggered to move, so that the auxiliary ring 4 can move according to the extended length of the telescopic arm 3; as the length of the telescopic arm 3 continues to extend, the load centers of the main arm 2 and the telescopic arm 3 will also extend outward synchronously; when the length of the telescopic arm 3 extends to a certain length, the load center extends outward synchronously; at this time, the auxiliary ring 4 can move according to the extended length of the telescopic arm 3, and can better provide pulling force to the main arm 2 and the telescopic arm 3, thereby better protecting the main arm 2 and the telescopic arm 3.
[0027] A second hydraulic cylinder 11 is installed in the main arm 2 , and a telescopic end of the second hydraulic cylinder 11 is connected to the telescopic arm 3 . The second hydraulic cylinder 11 is provided to control the extension and contraction of the telescopic arm 3 on the main arm 2 .
[0028] A guide groove 12 is provided on the inner wall of the main arm 2, and the first guide block 7 and the second guide block 8 are both slidably connected to the guide groove 12. The guide groove 12 is provided to increase the contact area between the telescopic arm 3 and the inner wall of the main arm 2, thereby increasing the strength between the main arm 2 and the telescopic arm 3, and at the same time ensuring the stability of the telescopic arm 3 moving in the main arm 2.
[0029] A lower support frame 10 is installed on the main support frame 1. The lower support frame 10 is located at the lower part of the main arm 2. Both ends of the lower support frame 10 are respectively connected to the main support frame 1 and the main arm 2. By setting the lower support frame 10 to support the lower part of the main arm 2, the strength of the main arm 2 is further improved.
[0030] A groove 9 is provided on one side of the auxiliary ring 4 close to the main arm 2, and the first travel switch 13 and the second travel switch 14 are both installed in the groove 9. The first travel switch 13 and the second travel switch 14 are arranged to be located in the groove 9, so that the first travel switch 13 and the second travel switch 14 can be prevented from being exposed to the external environment, thereby protecting the first travel switch 13 and the second travel switch 14 and improving the service life of the first travel switch 13 and the second travel switch 14.
[0031] The size of the groove 9 is adapted to the main arm 2. Setting the size of the groove 9 to be adapted to the main arm 2 enables the groove 9 on the auxiliary ring 4 to seal one end of the main arm 2, thereby preventing impurities in the external environment from entering the main arm 2 and sealing and protecting the main arm 2.
[0032] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A crane telescopic arm protection device, comprising a main support frame (1), a main arm (2) being mounted on the main support frame (1), and a telescopic arm (3) being mounted on the main arm (2) and being capable of extending and retracting along the main arm (2), characterized in that: An auxiliary ring (4) is sleeved on the telescopic arm (3), a protection arm (5) is installed on the main support frame (1), the protection arm (5) is located above the main arm (2), a rotatable hydraulic cylinder (6) is installed at one end of the protection arm (5), and the telescopic end of the hydraulic cylinder (6) is rotatably connected to the auxiliary ring (4); The telescopic arm (3) is respectively provided with a first guide block (7) and a second guide block (8). The first guide block (7) and the second guide block (8) are both arranged on both sides of the telescopic arm (3), and the first guide block (7) is located at the front end of the telescopic end of the telescopic arm (3). The first guide block (7) is slidably connected with the auxiliary ring (4). The outer diameter of the first guide block (7) is the same as the inner diameter of the auxiliary ring (4), and the outer diameter of the second guide block (8) is larger than the inner diameter of the auxiliary ring (4). A first travel switch (13) corresponding to the second guide block (8) is installed on a side of the auxiliary ring (4) close to the second guide block (8). The front end of the second guide block (8) is used to trigger the first travel switch (13) on the auxiliary ring (4). The first travel switch (13) is electrically connected to the hydraulic cylinder (6). A second travel switch (14) corresponding to the main arm (2) is installed on a side of the auxiliary ring (4) close to the main arm (2). The second travel switch (14) is electrically connected to the hydraulic cylinder (6).
2. A crane telescopic arm protection device according to claim 1, characterized in that: A second hydraulic cylinder (11) is installed in the main arm (2), and a telescopic end of the second hydraulic cylinder (11) is connected to the telescopic arm (3).
3. A crane telescopic arm protection device according to claim 1, characterized in that: The inner side wall of the main arm (2) is provided with a guide groove (12), and the first guide block (7) and the second guide block (8) are both slidably connected to the guide groove (12).
4. A crane telescopic arm protection device according to claim 1, characterized in that: A lower support frame (10) is mounted on the main support frame (1), the lower support frame (10) is located at the lower part of the main arm (2), and two ends of the lower support frame (10) are respectively connected to the main support frame (1) and the main arm (2).
5. A crane telescopic arm protection device according to claim 1, characterized in that: A groove (9) is provided on a side of the auxiliary ring (4) close to the main arm (2), and the first travel switch (13) and the second travel switch (14) are both installed in the groove (9).
6. A crane telescopic arm protection device according to claim 5, characterized in that: The size of the groove (9) is adapted to that of the main arm (2).