Crane truss arm

Abstract

The invention relates to the technical field of cranes, and discloses a crane truss arm which comprises a truss arm body, a pulley is rotationally connected to the inner wall of the truss arm body, a steel rope is arranged at the top of the truss arm body, and a limiting component is arranged in the truss arm body; the limiting component comprises a fixing frame, the end of the fixing frame is fixedly connected with the inner wall of the truss arm, a hydraulic rod is fixedly connected to the surface of the fixing frame, a synchronous rod is fixedly connected to the telescopic end of the hydraulic rod, and a sliding groove frame is fixedly connected to the end of the synchronous rod. The truss arm supports the steel rope through the pulley, when the steel rope works, the hydraulic rod is driven to extend outwards, when the hydraulic rod extends, the sliding groove frame is pushed to slide on the surface of the groove plate through the synchronizing rod, and the sliding groove frame slides on the inner wall of a groove of the groove plate through the stabilizing block; the sliding groove frame and the stabilizing block are matched with each other to improve the stability of the synchronous rod in the moving process, the hydraulic rod is prevented from being subjected to large pressure, and the synchronous rod pushes the inclined plate to move towards the outer end of the truss arm through the positioning disc in the moving process.

Description

Technical Field

[0001] The invention relates to the technical field of cranes, in particular to a crane truss arm. Background Art

[0002] Crane truss arm is a mechanical engineering term, which belongs to the truss structure of the lifting arm. The truss arm is the main form of the auxiliary arm of the wheeled crane and the arm of the crawler crane. It is widely used in ports, hydropower, railways and petrochemical industries. The load-bearing capacity of the truss arm directly determines the lifting performance of the crane, and its local stability is one of the main mechanical problems that limit the load-bearing capacity. In engineering practice, the local stability of the truss arm structure is mainly calculated using the stability formula of the axially compressed member in the specification; The crane truss arm needs to support the steel rope through a pulley during use. The steel rope will wear out after long-term use. When the steel rope breaks during use, the steel rope will quickly separate from the truss arm through elasticity. The separated steel rope is easily entangled on the surface of the truss arm and is difficult to handle. Summary of the invention

[0003] The object of the present invention is to provide a crane lattice boom to solve the problems raised in the above background technology.

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention is a crane truss arm, comprising a truss arm, the inner wall of the truss arm is rotatably connected with a pulley, the top of the truss arm is provided with a steel rope, and a limiting component is provided inside the truss arm; The limiting component includes a fixing frame, an end portion of the fixing frame is fixedly connected to the inner wall of the truss arm, a surface of the fixing frame is fixedly connected to a hydraulic rod, a telescopic end of the hydraulic rod is fixedly connected to a synchronization rod, an end of the synchronization rod is fixedly connected to a slide frame, the inner wall of the slide frame is fixedly connected to a stabilizing block, the inner wall of the truss arm is fixedly connected to a groove plate, a surface of the synchronization rod is fixedly connected to a positioning plate, a surface of the positioning plate is hinged with an inclined plate, a surface of the inclined plate is fixedly connected to a connecting rod, a semicircular frame is sleeved on the surface of the connecting rod, a central rotation of the semicircular frame is connected to an extrusion rod, a resistance component is provided on the surface of the inclined plate, and a pressure component is provided on the end of the inclined plate away from the positioning plate.

[0005] Furthermore, the surface of the steel rope contacts the inner wall of the pulley and extends to the bottom of the truss arm, the fixed frame is located at the inner center of the truss arm, the number of the groove plates is two, and the two groove plates are symmetrically arranged with the hydraulic rod as the center, the inner wall of the slide frame is slidably connected to the surface of the groove plate, and the surface of the stabilizing block is slidably connected to the inner wall of the groove of the groove plate.

[0006] Furthermore, two inclined plates are arranged on the surface of the positioning plate, and the two inclined plates are symmetrically arranged with the positioning plate as the center. One end of the inclined plate away from the positioning plate extends to the outer end of the truss arm, and the surface of the extrusion rod contacts the surface of the pulley.

[0007] Furthermore, the resistance component includes a round rod, the end of the round rod is fixedly connected to the surface of the inclined plate, the surface of the round rod is rotatably connected to a rotating rod, the surface of the rotating rod is provided with a friction groove, the inner wall of the rotating rod is provided with a cylindrical hole, the inner wall of the cylindrical hole is provided with a contact groove, the surface of the round rod is fixedly connected to a limiting ring, the surface of the limiting ring is hinged with a top plate, the surface of the top plate is fixedly connected to a spring sheet, and the end of the spring sheet away from the top plate is fixedly connected to the surface of the limiting ring.

[0008] Furthermore, the friction groove and the pulley correspond to each other, the limiting ring is located inside the cylindrical hole, the end of the top plate away from the limiting ring contacts the inner wall of the contact groove, and the end of the top plate close to the spring is inclined.

[0009] Further, the pressure component includes a connecting plate, an end of the connecting plate is fixedly connected to the inclined plate, an end of the connecting plate away from the inclined plate is fixedly connected to an inclined frame, a surface of the inclined frame is fixedly connected to a slide plate, a surface of the slide plate is fixedly connected to a support rod, a surface of the support rod is fixedly connected to an elastic rod, an end of the elastic rod away from the support rod is fixedly connected to a movable frame, an end of the movable frame away from the elastic rod is fixedly connected to a round hole rod, and an inner wall of the round hole rod is fixedly connected to a pressure rod.

[0010] Furthermore, the connecting plate is located at one end of the inclined plate away from the positioning plate, the end of the inclined frame away from the connecting plate is arranged close to each other, and the supporting rod is located at one end of the slide plate away from the inclined frame.

[0011] Furthermore, the inner wall of the movable frame is slidably connected to the surface of the slide plate, the end of the pressure rod passes through the round hole rod and extends to the outer end of the round hole rod, and the surface of the pressure rod contacts the surface of the rotating rod.

[0012] The present invention has the following beneficial effects: The truss arm of the present invention supports the steel rope through the pulley. When the steel rope is in operation, the hydraulic rod is driven to extend outward. When the hydraulic rod is extended, the slide frame is pushed by the synchronous rod to slide on the surface of the groove plate. The slide frame slides on the inner wall of the groove of the groove plate through the stabilizing block. The slide frame and the stabilizing block cooperate with each other to improve the stability of the synchronous rod when moving, and avoid the hydraulic rod from being subjected to greater pressure. When the synchronous rod moves, the inclined plate is pushed to move toward the outer end of the truss arm through the positioning plate. At the same time, the extrusion rod is pushed to move through the connection between the connecting rod and the semicircular frame. After the extrusion rod contacts the surface of the pulley, the end of the semicircular frame is squeezed to expand. When expanding, the inclined plate is pushed to move toward the outer end of the truss arm, thereby improving the stability of the inclined plate when supporting the steel rope, and at the same time improving the tensioning force of the steel rope during operation.

[0013] The rotating rod of the present invention supports and limits the steel rope through the friction groove. The steel rope is arranged inside the friction groove to prevent the steel rope from falling off the rotating rod. When the inclined plate expands, it pushes the steel rope to expand through the friction groove, thereby improving the stability of the steel rope during lifting operations. When the steel rope moves, it pushes the rotating rod to rotate on the surface of the round rod through friction. When the steel rope breaks and retracts, the limiting ring squeezes the inner wall of the contact groove through the top plate, thereby preventing the rotating rod from rotating with the retraction of the steel rope, causing the steel rope to retract faster.

[0014] When the steel rope of the present invention is installed inside the friction groove, the elastic rod will push the moving frame to slide on the surface of the slide plate through elasticity, and the end of the slide plate away from the supporting rod is inclined toward the surface of the rotating rod. The moving frame will push the pressure rod to contact the surface of the rotating rod according to the inclination of the slide plate, and squeeze and limit the steel rope inside the friction groove, so as to prevent the steel rope from being quickly separated from the pulley and splashing everywhere when it breaks.

[0015] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the truss arm of the present invention; Figure 3 This is a schematic diagram of the installation structure of the resistance component of the present invention; Figure 4 It is a schematic diagram of the overall structure of the limiting component of the present invention; Figure 5It is a schematic diagram of the overall structure of the resistance component of the present invention; Figure 6 It is a schematic diagram of the overall structure of the pressure component of the present invention.

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows: In the figure: 1. truss arm; 2. limiting component; 3. resistance component; 4. pressure component; 5. steel rope; 6. pulley; 10. fixed frame; 11. hydraulic rod; 12. groove plate; 13. stabilizing block; 14. connecting rod; 15. synchronization rod; 16. extrusion rod; 17. slide frame; 18. semicircular frame; 19. positioning plate; 20. inclined plate; 30. rotating rod; 31. friction groove; 32. contact groove; 33. top plate; 34. spring piece; 35. round rod; 36. cylindrical hole; 37. limiting ring; 40. connecting plate; 41. slide plate; 42. inclined frame; 43. pressure rod; 44. round hole rod; 45. elastic rod; 46. support rod; 47. moving frame. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1-Figure 6 As shown, the present invention is a crane truss arm, comprising a truss arm 1, the inner wall of the truss arm 1 is rotatably connected with a pulley 6, a steel rope 5 is arranged on the top of the truss arm 1, and a limiting component 2 is arranged inside the truss arm 1; The limiting component 2 includes a fixed frame 10, the end of the fixed frame 10 is fixedly connected to the inner wall of the truss arm 1, the surface of the fixed frame 10 is fixedly connected to a hydraulic rod 11, the telescopic end of the hydraulic rod 11 is fixedly connected to a synchronization rod 15, the end of the synchronization rod 15 is fixedly connected to a slide frame 17, the inner wall of the slide frame 17 is fixedly connected to a stabilizing block 13, the inner wall of the truss arm 1 is fixedly connected to a groove plate 12, the surface of the synchronization rod 15 is fixedly connected to a positioning plate 19, the surface of the positioning plate 19 is hinged with an inclined plate 20, the surface of the inclined plate 20 is fixedly connected to a connecting rod 14, the surface of the connecting rod 14 is sleeved with a semicircular frame 18, the center of the semicircular frame 18 is rotatably connected to an extrusion rod 16, the surface of the inclined plate 20 is provided with a resistance component 3, and the end of the inclined plate 20 away from the positioning plate 19 is provided with a pressure component 4.

[0021] The surface of the steel rope 5 contacts the inner wall of the pulley 6 and extends to the bottom of the truss arm 1. The fixed frame 10 is located at the inner center of the truss arm 1. The truss arm 1 of the present invention supports the steel rope 5 through the pulley 6. When the steel rope 5 is in operation, it drives the hydraulic rod 11 to extend outward. When the hydraulic rod 11 extends, it pushes the chute frame 17 to slide on the surface of the groove plate 12 through the synchronous rod 15. The chute frame 17 slides on the inner wall of the groove of the groove plate 12 through the stabilizing block 13. The chute frame 17 and the stabilizing block 13 cooperate with each other to improve the stability of the synchronous rod 15 when moving, so as to prevent the hydraulic rod 11 from being subjected to greater pressure. When the synchronous rod 15 moves, it passes through the positioning plate 19 The inclined plate 20 is pushed to move toward the outer end of the truss arm 1, and the extrusion rod 16 is pushed to move through the connection between the connecting rod 14 and the semicircular frame 18. After the extrusion rod 16 contacts the surface of the pulley 6, the end of the semicircular frame 18 is squeezed to expand, and the inclined plate 20 is pushed to move toward the outer end of the truss arm 1 during expansion, thereby improving the stability of the inclined plate 20 when supporting the steel rope 5, and at the same time improving the tensioning force of the steel rope 5 during operation. There are two groove plates 12, and the two groove plates 12 are symmetrically arranged with the hydraulic rod 11 as the center. The inner wall of the slide frame 17 is slidably connected to the surface of the groove plate 12, and the surface of the stabilizing block 13 is slidably connected to the inner wall of the groove of the groove plate 12.

[0022] Two inclined plates 20 are provided on the surface of the positioning plate 19 , and the two inclined plates 20 are symmetrically arranged with the positioning plate 19 as the center. One end of the inclined plate 20 away from the positioning plate 19 extends to the outer end of the truss arm 1 , and the surface of the extrusion rod 16 contacts the surface of the pulley 6 .

[0023] The resistance component 3 includes a round rod 35, the end of which is fixedly connected to the surface of the inclined plate 20, the surface of the round rod 35 is rotatably connected to the rotating rod 30, the surface of the rotating rod 30 is provided with a friction groove 31, the inner wall of the rotating rod 30 is provided with a cylindrical hole 36, the inner wall of the cylindrical hole 36 is provided with a contact groove 32, the surface of the round rod 35 is fixedly connected to a limiting ring 37, the surface of the limiting ring 37 is hinged with a top plate 33, the surface of the top plate 33 is fixedly connected to a spring sheet 34, and the end of the spring sheet 34 away from the top plate 33 is fixedly connected to the surface of the limiting ring 37.

[0024] The friction groove 31 corresponds to the pulley 6. The rotating rod 30 of the present invention supports and limits the steel rope 5 through the friction groove 31. The steel rope 5 is arranged inside the friction groove 31 to prevent the steel rope 5 from falling off the rotating rod 30. The inclined plate 20 pushes the steel rope 5 to expand through the friction groove 31 when expanding, thereby improving the stability of the steel rope 5 during lifting operations. When moving, the steel rope 5 pushes the rotating rod 30 to rotate on the surface of the round rod 35 through friction. When the steel rope breaks and retracts, the limiting ring 37 squeezes the inner wall of the contact groove 32 through the top plate 33 to prevent the rotating rod 30 from rotating with the retraction of the steel rope 5, causing the steel rope 5 to retract faster. The limiting ring 37 is located inside the cylindrical hole 36, and the end of the top plate 33 away from the limiting ring 37 contacts the inner wall of the contact groove 32, and the end of the top plate 33 close to the spring 34 is inclined.

[0025] The pressure component 4 includes a connecting plate 40, the end of the connecting plate 40 is fixedly connected to the inclined plate 20, the end of the connecting plate 40 away from the inclined plate 20 is fixedly connected to an inclined frame 42, the surface of the inclined frame 42 is fixedly connected to a slide plate 41, the surface of the slide plate 41 is fixedly connected to a support rod 46, the surface of the support rod 46 is fixedly connected to an elastic rod 45, the end of the elastic rod 45 away from the support rod 46 is fixedly connected to a movable frame 47, the end of the movable frame 47 away from the elastic rod 45 is fixedly connected to a round hole rod 44, and the inner wall of the round hole rod 44 is fixedly connected to a pressure rod 43.

[0026] The connecting plate 40 is located at the end of the inclined plate 20 away from the positioning plate 19. When the steel rope 5 of the present invention is installed inside the friction groove 31, the elastic rod 45 will elastically push the movable frame 47 to slide on the surface of the slide plate 41, and the end of the slide plate 41 away from the support rod 46 is inclined toward the surface of the rotating rod 30. The movable frame 47 will push the pressure rod 43 to contact the surface of the rotating rod 30 as the slope of the slide plate 41, and squeeze and limit the steel rope 5 inside the friction groove 31 to prevent the steel rope 5 from quickly separating from the pulley 6 and splashing everywhere when it breaks. The end of the inclined frame 42 away from the connecting plate 40 is arranged close to each other, and the support rod 46 is located at the end of the slide plate 41 away from the inclined frame 42.

[0027] The inner wall of the moving frame 47 is slidably connected to the surface of the slide plate 41 , the end of the pressure rod 43 passes through the round hole rod 44 and extends to the outer end of the round hole rod 44 , and the surface of the pressure rod 43 contacts the surface of the rotating rod 30 .

[0028] When in use, the truss arm 1 supports the steel rope 5 through the pulley 6. When the steel rope 5 is in operation, the hydraulic rod 11 is driven to extend outward. When the hydraulic rod 11 is extended, the sliding groove frame 17 is pushed by the synchronous rod 15 to slide on the surface of the groove plate 12. The sliding groove frame 17 slides on the inner wall of the groove of the groove plate 12 through the stabilizing block 13. The sliding groove frame 17 and the stabilizing block 13 cooperate with each other to improve the stability of the synchronous rod 15 when moving, and prevent the hydraulic rod 11 from being subjected to greater pressure. When moving, the synchronous rod 15 pushes the inclined plate 20 to move toward the outer end of the truss arm 1 through the positioning plate 19, and at the same time, the extrusion rod 16 is pushed to move through the connection between the connecting rod 14 and the semicircular frame 18. After the extrusion rod 16 contacts the surface of the pulley 6, the end of the semicircular frame 18 is squeezed to expand, and the inclined plate 20 is pushed to move toward the outer end of the truss arm 1 when expanding, thereby improving the stability of the inclined plate 20 when supporting the steel rope 5, and at the same time improving the tensioning force of the steel rope 5 during operation. The rotating rod 30 supports the steel rope 5 through the friction groove 31 When the steel rope 5 is moved, the rotating rod 30 is pushed to rotate on the surface of the round rod 35 by friction. When the steel rope breaks and retracts, the limiting ring 37 squeezes the inner wall of the contact groove 32 through the top plate 33 to prevent the rotating rod 30 from retracting as the steel rope 5 retracts, causing the steel rope 5 to retract faster. When the steel rope 5 is installed in the friction groove 31, the elastic rod 45 will elastically push the moving frame 47 to slide on the surface of the slide plate 41, and the end of the slide plate 41 away from the support rod 46 is inclined toward the surface of the rotating rod 30. The moving frame 47 will push the pressure rod 43 to contact the surface of the rotating rod 30 with the inclination of the slide plate 41, and squeeze the steel rope 5 to limit it in the friction groove 31, so as to prevent the steel rope 5 from being quickly separated from the pulley 6 and splashing everywhere when it breaks.

[0029] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A crane truss arm, comprising a truss arm (1), characterized in that: The inner wall of the truss arm (1) is rotatably connected to a pulley (6), a steel rope (5) is provided on the top of the truss arm (1), and a limiting component (2) is provided inside the truss arm (1); The limiting component (2) comprises a fixing frame (10), the end of the fixing frame (10) is fixedly connected to the inner wall of the truss arm (1), the surface of the fixing frame (10) is fixedly connected to a hydraulic rod (11), the telescopic end of the hydraulic rod (11) is fixedly connected to a synchronization rod (15), the end of the synchronization rod (15) is fixedly connected to a slide frame (17), the inner wall of the slide frame (17) is fixedly connected to a stabilizing block (13), and the inner wall of the truss arm (1) is fixedly connected to a groove plate (12). The surface of the synchronization rod (15) is fixedly connected to a positioning plate (19), the surface of the positioning plate (19) is hingedly connected to an inclined plate (20), the surface of the inclined plate (20) is fixedly connected to a linkage rod (14), the surface of the linkage rod (14) is sleeved with a semicircular frame (18), the center of the semicircular frame (18) is rotatably connected to an extrusion rod (16), the surface of the inclined plate (20) is provided with a resistance component (3), and the end of the inclined plate (20) away from the positioning plate (19) is provided with a pressure component (4).

2. A crane truss arm according to claim 1, characterized in that: The surface of the steel rope (5) contacts the inner wall of the pulley (6) and extends to the bottom of the truss arm (1); the fixing frame (10) is located at the inner center of the truss arm (1); two groove plates (12) are provided, and the two groove plates (12) are symmetrically arranged with the hydraulic rod (11) as the center; the inner wall of the slide frame (17) is slidably connected to the surface of the groove plate (12); and the surface of the stabilizing block (13) is slidably connected to the inner wall of the groove of the groove plate (12).

3. A crane truss arm according to claim 2, characterized in that: The surface of the positioning plate (19) is provided with two inclined plates (20), the two inclined plates (20) are symmetrically arranged with the positioning plate (19) as the center, and one end of the inclined plate (20) away from the positioning plate (19) extends to the outer end of the truss arm (1), and the surface of the extrusion rod (16) contacts the surface of the pulley (6).

4. A crane truss arm according to claim 3, characterized in that: The resistance component (3) comprises a round rod (35), the end of which is fixedly connected to the surface of the inclined plate (20), the surface of the round rod (35) being rotatably connected to a rotating rod (30), the surface of the rotating rod (30) being provided with a friction groove (31), the inner wall of the rotating rod (30) being provided with a cylindrical hole (36), the inner wall of the cylindrical hole (36) being provided with a contact groove (32), the surface of the round rod (35) being fixedly connected to a limiting ring (37), the surface of the limiting ring (37) being hinged to a top plate (33), the surface of the top plate (33) being fixedly connected to a spring sheet (34), and one end of the spring sheet (34) away from the top plate (33) being fixedly connected to the surface of the limiting ring (37).

5. A crane truss arm according to claim 4, characterized in that: The friction groove (31) and the pulley (6) correspond to each other, the limiting ring (37) is located inside the cylindrical hole (36), one end of the top plate (33) away from the limiting ring (37) contacts the inner wall of the contact groove (32), and one end of the top plate (33) close to the spring sheet (34) is inclined.

6. A crane lattice boom according to claim 5, characterized in that: The pressure component (4) comprises a connecting plate (40), the end of the connecting plate (40) is fixedly connected to the inclined plate (20), one end of the connecting plate (40) away from the inclined plate (20) is fixedly connected to an inclined frame (42), the surface of the inclined frame (42) is fixedly connected to a slide plate (41), the surface of the slide plate (41) is fixedly connected to a support rod (46), the surface of the support rod (46) is fixedly connected to an elastic rod (45), one end of the elastic rod (45) away from the support rod (46) is fixedly connected to a movable frame (47), one end of the movable frame (47) away from the elastic rod (45) is fixedly connected to a round hole rod (44), and the inner wall of the round hole rod (44) is fixedly connected to a pressure rod (43).

7. The crane truss arm according to claim 6, characterized in that: The connecting plate (40) is located at an end of the inclined plate (20) away from the positioning plate (19), the ends of the inclined frames (42) away from the connecting plate (40) are arranged close to each other, and the supporting rod (46) is located at an end of the sliding plate (41) away from the inclined frames (42).

8. The crane truss arm according to claim 7, characterized in that: The inner wall of the movable frame (47) is slidably connected to the surface of the slide plate (41); the end of the pressure rod (43) passes through the round hole rod (44) and extends to the outer end of the round hole rod (44); and the surface of the pressure rod (43) contacts the surface of the rotating rod (30).

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