Vehicle-mounted crane with adjustable crawling ladder

Abstract

The utility model provides a vehicle-mounted crane with an adjustable ladder stand, which comprises a carriage base, and a crane body is mounted on the carriage base; a ladder stand device is mounted on the carriage base; the ladder stand device comprises a connecting seat mounted on the carriage base; one side of the connecting seat horizontally extends out of the outer side of the edge of the carriage base and is connected with a folding ladder stand; the folding ladder stand is vertically and fixedly connected with the connecting seat and is arranged below the outer side of the carriage base; the folding ladder stand is composed of a plurality of folding ladder sections, and every two folding ladder sections are connected in a relatively rotating mode through connecting blocks. A padlock assembly is further arranged between every two folding ladder sections, and the padlock assemblies are used for locking the folding ladder sections when the folding ladder stand is in a folding state. The equipment is fixedly mounted in a structure which saves the most space, so that the equipment is convenient to climb and operate, and the operation of the crane body is not hindered.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering equipment, in particular to a vehicle-mounted crane with an adjustable ladder. Background Art

[0002] The crane body is a mechanical equipment used for lifting and moving heavy objects. It is widely used in construction, manufacturing, cargo handling and other fields. It is usually composed of a crane arm, a hook, a crane body structure, an operating mechanism and a control system. The control system is concentrated in the cab.

[0003] Some truck-mounted cranes have a control room on the carriage. In order to provide a good view, the control room is usually set at a higher position. In order to reduce the impact of the components on the carriage on the operation of the boom, ladders and other high-support components are saved. As a result, when operators go to the control room or maintenance personnel go to the carriage for maintenance, they have to rely on the tires, plate racks and other parts on the car body to climb up, which brings inconvenience to work.

[0004] To this end, the present application provides a vehicle-mounted crane with an adjustable ladder, which is convenient for workers to climb and operate and will not hinder the operation of the boom. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the utility model provides a vehicle-mounted crane body with an adjustable folding structure, and the specific technical solution is as follows:

[0006] A vehicle-mounted crane with an adjustable ladder comprises a vehicle body base, the vehicle body base is arranged off the ground, and a crane body is installed on the vehicle body base; a ladder device is installed on the vehicle body base; the ladder device comprises a connecting seat installed on the vehicle body base; one side of the connecting seat horizontally extends outward from the edge of the vehicle body base and is connected to a folding ladder; the folding ladder is vertically fixedly connected to the connecting seat and is arranged below the outer side of the vehicle body base; the folding ladder is composed of a plurality of folding ladder sections, and the plurality of folding ladder sections are connected to each other by connecting blocks so as to be relatively rotatable; and a buckle lock assembly is also arranged between the plurality of folding ladder sections, and the buckle lock assembly is used to lock the plurality of folding ladder sections when the folding ladder is in a folded state.

[0007] Preferably, each of the folding ladder sections is composed of two symmetrically arranged longitudinal beams and a plurality of transverse beams arranged in parallel and spaced apart between the two longitudinal beams; the longitudinal beam has a "convex" shape in cross section, and both ends along its length direction are sunken to form extended mounting portions, and the extended mounting portions of the two longitudinal beams are arranged opposite to each other;

[0008] The cross section of the connection block is elliptical, and its two opposite outer sides are arc end faces; through holes are respectively provided on the surface of the connection block near the two arc end faces;

[0009] Two connecting blocks are installed between two adjacent folding ladder sections; each connecting block is placed on the extended mounting parts of two adjacent longitudinal beams, and the two connecting blocks are symmetrically arranged along the central axis plane of the cross beam; one cross beam is connected between the two extended mounting parts corresponding to the same folding ladder section, and the two ends of the cross beam are rotatably passed through the through holes corresponding to the two connecting blocks, and then fixedly connected to the adjacent extended mounting parts;

[0010] Each of the folding ladder sections can be turned around the arc end surface of the connecting block.

[0011] Furthermore, the locking assembly includes a locking hook block and a positioning rod; on the two adjacent folding ladder sections, one of the folding ladder sections is provided with the locking hook block, and the other folding ladder section is correspondingly provided with the positioning rod; a recessed locking groove is formed on the locking hook block, and the locking groove matches the shape and size of the positioning rod, and one end of the locking hook block is rotatably mounted on the outside of one of the folding ladder sections; when the two adjacent folding ladder sections are in a folded state, the locking hook block can be rotated to the locking groove and buckled on the positioning rod.

[0012] Preferably, the notch of the locking groove is interference matched with the diameter of the positioning rod.

[0013] Furthermore, it also includes a limiting assembly for keeping each of the folding ladder sections in a vertical state when the folding ladder is unfolded; a group of the limiting assemblies is arranged on every two adjacent folding ladder sections; each group of limiting assemblies includes at least a first ear plate, a second ear plate and an insertion rod; the first ear plate is arranged on the outer side of one of the folding ladder sections, and a first positioning hole is arranged on the first ear plate; the second ear plate is arranged on the outer side of another adjacent folding ladder section, and a second positioning hole is arranged on the second ear plate; the diameter of the insertion rod does not exceed the aperture diameters of the first positioning hole and the second positioning hole; a hand grip rod is extended and connected to the outer side of the insertion rod; a limiting block is also sleeved on the outer periphery of the insertion rod, and the outer diameter of the limiting block is larger than the aperture diameters of the first positioning hole and the second positioning hole;

[0014] When two adjacent folding ladder sections are unfolded 180°, the first ear plate and the second ear plate are in corresponding positions; the insertion rod can be inserted into the first positioning hole and the second positioning hole in sequence to keep the two adjacent folding ladder sections in the same plane, and the limit block can be placed above the first positioning hole or the second positioning hole with a higher horizontal position to position the insertion rod.

[0015] Furthermore, the connecting seat can also be slidably installed on the car base through the mounting seat; the cross-section of the mounting seat is in the shape of an "I", including a fixed seat, a vertical rod and a limit block, the vertical rod is vertically connected between the fixed seat and the limit block, and the fixed seat is fixedly installed on the car base; the connecting seat is also provided with a sliding groove, the sliding groove is sleeved on the outer periphery of the vertical rod, and the width of the sliding groove does not exceed the diameter of the limit block; the connecting seat can drive the folding ladder to synchronously slide relative to the car base within the length of the sliding groove.

[0016] Preferably, a vertically arranged first guide plate is provided on the limit block, and a first through hole is provided on the first guide plate; a vertically arranged second guide plate is provided on the connecting seat, and the second guide plate and the folding ladder are respectively located on opposite sides of the sliding through groove; the first guide plate and the second guide plate are connected by a "T"-shaped guide rod; the rod body of the guide rod is fixedly connected to the second guide plate after passing through the first through hole; the rod head of the guide rod is located on the side of the first guide plate close to the folding ladder, and its diameter is larger than the aperture of the first through hole; the guide rod and the central axis of the sliding through groove are parallel to each other.

[0017] Preferably, the rod body of the guide rod is transitionally matched with the first through hole.

[0018] Preferably, handles are installed on both sides of the upper surface of the connecting seat.

[0019] The beneficial effects of the utility model are as follows: the device provides a foldable push-pull climbing ladder, which is fixed on the carriage base in a structure that saves the most space, which is convenient for workers to climb and operate, and will not hinder the operation of the crane body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall three-dimensional structure of this embodiment.

[0021] Figure 2 It is a schematic diagram of the three-dimensional structure of the mounting base, the connecting base and the folding ladder part of this embodiment.

[0022] Figure 3 It is a schematic diagram of a partial structural cross-section of this embodiment;

[0023] Figure 4 Schematic diagram of the three-dimensional structure of the buckle lock assembly of this embodiment.

[0024] Figure markings: 1-carriage base; 2-mounting seat; 21-fixed seat; 22-vertical rod; 23-limiting block; 231-first guide plate; 232-first through hole; 3-connecting seat; 31-sliding groove; 32-second guide plate; 5-guide rod; 6-handle; 700-folding ladder; 7-folding ladder section; 71-longitudinal beam; 72-cross beam; 711-extension mounting portion; 8-connecting block; 81-through hole; 82-arc end face; 91-first ear plate; 911-first positioning hole; 92-second ear plate; 10-insertion rod; 101-hand grip rod; 102-limiting block; 12-lock hook block; 121-locking groove; 13-positioning rod. DETAILED DESCRIPTION

[0025] The technical solution of the utility model is further described below in conjunction with the accompanying drawings.

[0026] like Figure 1-Figure 4 As shown, a vehicle-mounted crane with an adjustable ladder comprises a vehicle base 1, which is set off the ground and has a crane body installed on the vehicle base 1. A ladder device is also installed on the vehicle base 1. The ladder device comprises a connecting seat 3, a mounting seat 2 and a folding ladder 700.

[0027] The specific structure of the ladder device is as follows:

[0028] The connecting seat 3 is slidably mounted on the carriage base 1 through the mounting seat 2. The cross-section of the mounting seat 2 is in the shape of an "I" character, and includes a fixed seat 21, a vertical rod 22 and a limit block 23. The vertical rod 22 is vertically connected between the fixed seat 21 and the limit block 23; the fixed seat 21 is fixedly mounted on the carriage base 1. A sliding groove 31 is provided on the connecting seat 3, and the sliding groove 31 is sleeved on the outer periphery of the vertical rod 22; the limit block 23 is located above the sliding groove 31, and the width of the sliding groove 31 does not exceed the diameter of the limit block 23. The connecting seat 3 can slide relative to the carriage base 1 within the length range of the sliding groove 31.

[0029] One side of the connecting seat 3 horizontally extends out of the edge of the carriage base 1 and is connected to a folding ladder 700. The folding ladder 700 is vertically fixedly connected to the connecting seat 3 and is arranged below the outer side of the carriage base 1. The folding ladder 700 is composed of a plurality of folding ladder sections 7. Each folding ladder section 7 is composed of two symmetrically arranged longitudinal beams 71 and a plurality of cross beams 72 arranged between the two longitudinal beams 71 in parallel and at intervals. The cross section of the longitudinal beam 71 is in a "convex" shape, and the two ends along the length direction thereof are respectively sunken to form an extended mounting portion 711, and the extended mounting portions 711 of the two longitudinal beams 71 are arranged opposite to each other.

[0030] A plurality of folding ladder sections 7 are connected to each other in a relatively rotatable manner through a connecting block 8. A plurality of folding ladder sections 7 can be unfolded and arranged in the same plane, or can be folded in sequence. The cross section of the connecting block 8 is elliptical, and its two opposite outer sides are arc end faces 82. Through holes 81 are respectively provided on the surface of the connecting block 8 near the two arc end faces 82. Two connecting blocks 8 are installed between two adjacent folding ladder sections 7. Each connecting block 8 is placed on the extended mounting portion 711 of two adjacent longitudinal beams 71, and the two connecting blocks 8 are symmetrically arranged along the central axis plane of the cross beam 72. A cross beam 72 is connected between the two corresponding extended mounting portions 711 of the same folding ladder section 7, and the two ends of the cross beam 72 are respectively rotatably penetrated through the corresponding through holes 81 of the two connecting blocks 8, and then fixedly connected to the adjacent extended mounting portions 711. Each folding ladder section 7 can be turned around the arc end face 82 of the connecting block 8, so that the two adjacent folding ladder sections 7 can be relatively unfolded to 180° or completely folded.

[0031] like Figure 1-3 The folding ladder 700 is also provided with a limiting assembly. When the folding ladder 700 is unfolded, the limiting assembly can be used to keep each folding ladder section 7 in a limiting state in the same plane to prevent the folding ladder 700 from loosening and shaking. A set of limiting assemblies is provided on each two adjacent folding ladder sections 7. Each set of limiting assemblies includes a first ear plate 91, a second ear plate 92 and an insertion rod 10. The first ear plate 91 is arranged on the outer side of the longitudinal beam 71 of one of the folding ladder sections 7, and a first positioning hole 911 is opened on the first ear plate 91. The second ear plate 92 is arranged on the outer side of the longitudinal beam 71 of another adjacent folding ladder section 7, and a second positioning hole (not shown) is opened on the second ear plate 92. The diameter of the insertion rod 10 does not exceed the aperture of the first positioning hole 911 and the second positioning hole; the outer side of the insertion rod 10 is extended and connected with a hand grip rod 101; the outer periphery of the insertion rod 10 is also fixedly sleeved with a limiting block 102, and the outer diameter of the limiting block 102 is larger than the aperture of the first positioning hole 911 and the second positioning hole. When two adjacent folding ladder sections 7 are unfolded at 180°, the first ear plate 91 and the second ear plate 92 are in corresponding positions. The insertion rod 10 can be inserted into the first positioning hole 911 and the second positioning hole in sequence to keep the two adjacent folding ladder sections 7 in the same plane, and the stopper 102 can be placed above the first positioning hole 911 or the second positioning hole with a higher horizontal position to position the insertion rod 10.

[0032] like Figure 2-4A buckle lock assembly is also provided between the plurality of folding ladder sections 7, and the buckle lock assembly is used to lock the plurality of folding ladder sections 7 when the folding ladder 700 is in a folded state. The buckle lock assembly includes a lock hook block 12 and a positioning rod 13. On the two adjacent folding ladder sections 7, one of the folding ladder sections 7 is provided with a lock hook block 12, and the other folding ladder section 7 is correspondingly provided with a positioning rod 13. A recessed lock groove 121 is formed on the lock hook block 12, and the lock groove 121 matches the shape and size of the positioning rod 13. One end of the lock hook block 12 is rotatably mounted on the outer side of one of the folding ladder sections 7. When two adjacent folding ladder sections 7 are in a folded state, the lock hook block 12 corresponds to the position of the positioning rod 13, and the lock hook block 12 can be rotated until its lock groove 121 is buckled on the positioning rod 13, and the notch of the lock groove 121 is interference matched with the diameter of the positioning rod 13.

[0033] like Figure 2-3 , a vertically arranged first guide plate 231 is provided on the limit block 23, and a first through hole 232 is provided on the first guide plate 231. A vertically arranged second guide plate 32 is provided on the connecting seat 3, and the second guide plate 32 and the folding ladder 700 are respectively located on opposite sides of the sliding groove 31. The first guide plate 231 and the second guide plate 32 are connected by a "T"-shaped guide rod 5. The rod body of the guide rod 5 passes through the first through hole 232 and is fixedly connected to the second guide plate 32. The rod head of the guide rod 5 is located on the side of the first guide plate 231 close to the folding ladder 700, and its diameter is larger than the aperture of the first through hole 232. The central axis of the guide rod 5 and the sliding through groove 31 are parallel to each other. The rod body of the guide rod 5 is transitionally matched with the first through hole 232.

[0034] Handles 6 are also installed on both sides of the upper surface of the connecting base 3.

[0035] When the ladder needs to be used, the lock hook block 12 is rotated to separate the lock slot 121 from the positioning rod 13, so that the folding ladder section 7 can be rotated and unfolded, and then the insertion rod 10 is inserted into the first positioning hole 911 and the second positioning hole in sequence, so that the adjacent folding ladder sections 7 are kept in a 180° plane limit. When the folding ladder needs to be folded, the insertion rod 10 is first pulled out, and the folding ladder section 7 can be rotated. After rotating 180°, the lock hook block 12 is rotated to make the lock slot 121 buckle on the positioning rod 13. The connecting seat 3 and the folding ladder 700 can be pushed outward as a whole to adjust the distance from the edge of the car base 1, so as to avoid collision and damage between the folding ladder 7 and the tire or other components.

Claims

1. A vehicle-mounted crane with an adjustable ladder, comprising a vehicle body base, the vehicle body base being arranged off the ground, and a crane body being mounted on the vehicle body base; characterized in that: A ladder device is installed on the carriage base; the ladder device includes a connecting seat installed on the carriage base; one side of the connecting seat horizontally extends outward from the edge of the carriage base and is connected to a folding ladder; the folding ladder is vertically fixedly connected to the connecting seat and is arranged below the outer side of the carriage base; the folding ladder is composed of a plurality of folding ladder sections, and the plurality of folding ladder sections are connected to each other by connecting blocks so as to be relatively rotatable; and a locking assembly is also provided between the plurality of folding ladder sections, and the locking assembly is used to lock the plurality of folding ladder sections when the folding ladder is in a folded state.

2. A vehicle-mounted crane with an adjustable ladder as claimed in claim 1, characterized in that: Each of the folding ladder sections is composed of two symmetrically arranged longitudinal beams and a plurality of transverse beams arranged in parallel and spaced apart between the two longitudinal beams; the longitudinal beam has a "convex" shape in cross section, and both ends along its length direction are sunken to form extended mounting portions, and the extended mounting portions of the two longitudinal beams are arranged opposite to each other; The cross section of the connection block is elliptical, and its two opposite outer sides are arc end faces; through holes are respectively provided on the surface of the connection block near the two arc end faces; Two connecting blocks are installed between two adjacent folding ladder sections; each connecting block is placed on the extended mounting parts of two adjacent longitudinal beams, and the two connecting blocks are symmetrically arranged along the central axis plane of the cross beam; one cross beam is connected between the two extended mounting parts corresponding to the same folding ladder section, and the two ends of the cross beam are rotatably passed through the through holes corresponding to the two connecting blocks, and then fixedly connected to the adjacent extended mounting parts; Each of the folding ladder sections can be turned around the arc end surface of the connecting block.

3. A vehicle-mounted crane with an adjustable ladder as claimed in claim 1, characterized in that: The locking assembly includes a locking hook block and a positioning rod; on the two adjacent folding ladder sections, one of the folding ladder sections is provided with the locking hook block, and the other folding ladder section is correspondingly provided with the positioning rod; a recessed locking groove is formed on the locking hook block, and the locking groove matches the shape and size of the positioning rod, and one end of the locking hook block is rotatably mounted on the outer side of one of the folding ladder sections; when the two adjacent folding ladder sections are in a folded state, the locking hook block can be rotated to the locking groove and buckled on the positioning rod.

4. A vehicle-mounted crane with an adjustable ladder as claimed in claim 3, characterized in that: The notch of the locking groove is interference matched with the diameter of the positioning rod.

5. A vehicle-mounted crane with an adjustable ladder as claimed in claim 1, characterized in that: It also includes a limiting assembly for keeping each of the folding ladder sections in a vertical state when the folding ladder is unfolded; a group of the limiting assemblies is arranged on every two adjacent folding ladder sections; each group of limiting assemblies includes at least a first ear plate, a second ear plate and an insertion rod; the first ear plate is arranged on the outer side of one of the folding ladder sections, and a first positioning hole is arranged on the first ear plate; the second ear plate is arranged on the outer side of another adjacent folding ladder section, and a second positioning hole is arranged on the second ear plate; the diameter of the insertion rod does not exceed the aperture diameters of the first positioning hole and the second positioning hole; a hand grip rod is extended and connected to the outer side of the insertion rod; a limiting block is also sleeved on the outer periphery of the insertion rod, and the outer diameter of the limiting block is larger than the aperture diameters of the first positioning hole and the second positioning hole; When two adjacent folding ladder sections are unfolded 180°, the first ear plate and the second ear plate are in corresponding positions; the insertion rod can be inserted into the first positioning hole and the second positioning hole in sequence to keep the two adjacent folding ladder sections in the same plane, and the limit block can be placed above the first positioning hole or the second positioning hole with a higher horizontal position to position the insertion rod.

6. A vehicle-mounted crane with an adjustable ladder as claimed in claim 1, characterized in that: The connecting seat can also be slidably installed on the carriage base through the mounting seat; the cross-section of the mounting seat is in the shape of an "I", including a fixed seat, a vertical rod and a limit block, the vertical rod is vertically connected between the fixed seat and the limit block, and the fixed seat is fixedly installed on the carriage base; the connecting seat is also provided with a sliding groove, the sliding groove is sleeved on the outer periphery of the vertical rod, and the width of the sliding groove does not exceed the diameter of the limit block; the connecting seat can drive the folding ladder to slide synchronously relative to the carriage base within the length range of the sliding groove.

7. A vehicle-mounted crane with an adjustable ladder as claimed in claim 6, characterized in that: The limit block is provided with a vertically arranged first guide plate, and the first guide plate is provided with a first through hole; the connecting seat is provided with a vertically arranged second guide plate, and the second guide plate and the folding ladder are respectively located on opposite sides of the sliding through groove; the first guide plate and the second guide plate are connected by a "T"-shaped guide rod; the rod body of the guide rod is fixedly connected to the second guide plate after passing through the first through hole; the rod head of the guide rod is located on a side of the first guide plate close to the folding ladder, and its diameter is larger than the aperture of the first through hole; the guide rod and the central axis of the sliding through groove are parallel to each other.

8. A vehicle-mounted crane with an adjustable ladder as claimed in claim 7, characterized in that: The rod body of the guide rod is transitionally matched with the first through hole.

9. A vehicle-mounted crane with an adjustable ladder as claimed in claim 1, characterized in that: Handles are also installed on both sides of the upper surface of the connecting seat.

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