Basic arm assembling device of truck-mounted crane

Abstract

A basic arm assembly device of a truck-mounted crane comprises a bottom plate, a front clamping mechanism and a rear clamping mechanism which can move in the length direction are installed on the bottom plate, a barrel support mechanism is installed on the portion, between the front clamping mechanism and the rear clamping mechanism, of the bottom plate, and the front clamping mechanism and the rear clamping mechanism can clamp and position the front end and the rear end of a basic arm of the truck-mounted crane. The barrel support mechanism can support the bottom of a basic arm of the truck-mounted crane, each of the front clamping mechanism and the rear clamping mechanism comprises a moving seat mechanism, and the moving seat mechanism of the front clamping mechanism is provided with two sets of front clamping seats capable of synchronously getting close to or getting away from each other. And two groups of rear clamping seats which can be synchronously close to or far away from each other are mounted on the moving seat mechanism of the rear clamping mechanism. The basic arm assembly device of the truck-mounted crane has the advantages of being accurate in positioning, efficient and automatic in operation, stable and reliable in clamping force, flexible in adjustment, high in adaptability, compact in structure, easy to maintain and the like.

Description

Technical Field

[0001] This utility model relates to the technical field of truck-mounted crane assembly and positioning devices, specifically a basic boom assembly device for a truck-mounted crane. Background Technology

[0002] A truck-mounted crane, also known as a truck-mounted crane transport vehicle, is a transport vehicle that combines a truck-mounted crane with a chassis. It consists of a boom, turntable, frame, outriggers, etc., and achieves its mechanical movements through mechanisms such as luffing, telescopic, slewing, and winching. Lifting operations are accomplished through combinations of different actions, and it is widely used for lifting and transporting infrastructure materials and other equipment in municipal construction, coal mining, landscaping, and other industries. The main boom is the main structural component of the truck-mounted crane's boom, typically a box-shaped cylindrical structure, along with a tailgate connecting to the vehicle body. Due to the tailgate, the front and rear ends of the truck-mounted crane's main boom have significantly different structures. Traditional positioning fixtures typically use several sets of identical clamping mechanisms to clamp and position the boom at different lengths, which is only suitable for booms with similar external shapes. With the presence of the tailgate, identical clamping mechanisms at both ends cannot achieve precise positioning and assembly, affecting the assembly quality of the truck-mounted crane's main boom. Utility Model Content

[0003] The purpose of this utility model is to provide a basic boom assembly device for truck-mounted cranes, which has front and rear clamping mechanisms with different structures on the base plate, enabling precise adaptive positioning of the front and rear tail plate parts of the basic boom, thus solving the problems in the prior art.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a truck-mounted crane basic boom assembly device, including a base plate, on which a front clamping mechanism and a rear clamping mechanism that can move along the length direction are installed. A cylindrical support mechanism is installed on the base plate between the front clamping mechanism and the rear clamping mechanism. The front clamping mechanism and the rear clamping mechanism can clamp and position the front and rear ends of the truck-mounted crane basic boom. The cylindrical support mechanism can support the bottom of the truck-mounted crane basic boom. Both the front clamping mechanism and the rear clamping mechanism include a movable seat mechanism. Two sets of components that can synchronously move closer or further away are installed on the movable seat mechanism of the front clamping mechanism. The front clamping seat and the moving seat mechanism of the rear clamping mechanism are equipped with two sets of rear clamping seats that can move closer or further apart synchronously. Several tail plate pins are mounted on the rear clamping seats. Electromagnets are provided on the inner side of the rear clamping seats. A rotatable swing arm clamping frame is hinged to the rear clamping seats via a swing cylinder. Several clamping cylinders are installed inside the swing arm clamping frame. Each clamping cylinder's piston rod is equipped with a pressure seat, which extends to press and position the tail plate onto the cylinder. A positioning frame is mounted on the front clamping mechanism, and a positioning cylinder is mounted on the rear clamping mechanism. The positioning frame and positioning cylinder are arranged correspondingly along the length of the base plate. The moving seat mechanism includes a traveling frame, on which a traveling motor is mounted. A drive gear is mounted on the output shaft of the traveling motor. Racks and first slide rails are provided on both sides along the length of the base plate. The racks mesh with the drive gears. A first slider that cooperates with the first slide rails is mounted on the traveling frame. The walking frame is equipped with an engagement anti-detachment mechanism, which includes a fixed seat on the walking frame, a movable seat that can swing is hinged to the fixed seat via a vertical shaft, a walking motor is mounted on the movable seat, a horizontally arranged sleeve is also installed on the walking frame, a nut is set at one end of the sleeve, a bolt is installed in the nut, and a spring is set between the sleeve and the movable seat. The spring always tends to press the drive gear on the movable seat against the rack. Rotating the bolt can adjust the preload pressure of the spring on the movable seat. A lead screw is installed along the length of the traveling frame. Two sets of nuts with opposite directions of rotation are mounted on the lead screw, and each nut is fitted with a clamping plate. A clamping motor is installed at one end of the traveling frame, and the output shaft of the clamping motor is connected to the lead screw. Second slide rails are installed on both sides of the traveling frame along its length. Second sliders that mate with the second slide rails are provided on the clamping plates. Two sets of front clamping seats and two sets of rear clamping seats are respectively installed on the clamping plates of the front clamping mechanism and the rear clamping mechanism. When the clamping motor is activated, it can drive the two sets of front clamping seats and the two sets of rear clamping seats to move closer to or further away from each other. The cylinder support mechanism includes a support gantry. A crossbeam is installed at the bottom of the support gantry, located above the base plate. Third sliders that mate with the first slide rails are installed at both ends of the bottom of the support gantry. A pad is also provided at the top of the support gantry.

[0005] The positive effects of this utility model are as follows: The truck-mounted crane basic boom assembly device described herein, through the design of front and rear clamping mechanisms with different structures, can accurately and adaptively position the front and rear tailplate parts of the truck-mounted crane basic boom. The above design fully considers the differences in the front and rear structure of the basic boom, effectively improving assembly accuracy and ensuring the assembly quality of the truck-mounted crane basic boom. Furthermore, the electromagnet and clamping cylinder installed on the rear clamping seat, along with the swing arm clamping frame hinged to the swing cylinder, together constitute a stable and reliable clamping system. The electromagnet can attract the tailplate, preventing it from sliding, while the clamping cylinder presses and positions the tailplate onto the cylinder body through a pressure seat, further enhancing the stability of clamping and the accuracy of positioning. This utility model's truck-mounted crane basic boom assembly device has positive effects such as precise positioning, efficient automated operation, stable and reliable clamping force, flexible adjustment and strong adaptability, and a compact structure that is easy to maintain. It provides strong technical support for the assembly of truck-mounted crane basic booms, effectively improving assembly quality and production efficiency. Attached Figure Description

[0006] Figure 1 This is a schematic diagram of the structure of this utility model;

[0007] Figure 2 This is a schematic diagram of the front clamping mechanism;

[0008] Figure 3 This is a schematic diagram of the rear clamping mechanism;

[0009] Figure 4 This is a structural schematic diagram of the cylinder support mechanism;

[0010] Figure 5 This is a schematic diagram of the rear clamping seat;

[0011] Figure 6 This is a side view of the movable seat mechanism on the base plate;

[0012] Figure 7 This is a front view of the movable seat mechanism on the base plate;

[0013] Figure 8 This is a schematic diagram of the engagement and anti-disengagement mechanism;

[0014] Figure 9 yes Figure 7 An enlarged view of the sectional view along the AA direction;

[0015] Figure 10 This is a schematic diagram illustrating the usage state of the positioning of the truck-mounted crane according to this utility model. Detailed Implementation

[0016] The basic boom assembly device for a truck-mounted crane described in this utility model, such as Figure 1-5As shown, the device includes a base plate 1, which serves as a support platform for the entire assembly. A front clamping mechanism and a rear clamping mechanism, movable along the length direction, are mounted on the base plate 1. A cylindrical support mechanism is mounted on the base plate 1 between the front and rear clamping mechanisms. The front and rear clamping mechanisms clamp and position the front and rear ends of the truck-mounted crane's basic boom, while the cylindrical support mechanism supports the bottom of the truck-mounted crane's basic boom. The cylindrical support mechanism can be an existing gantry frame or support beam structure, effectively supporting the middle section of the truck-mounted crane's basic boom.

[0017] Both the front and rear clamping mechanisms include a movable seat mechanism, which can travel along the length of the base plate 1. The movable seat mechanism of the front clamping mechanism is equipped with two sets of front clamping seats 2 that can move towards or away from each other synchronously, and the movable seat mechanism of the rear clamping mechanism is equipped with two sets of rear clamping seats 3 that can move towards or away from each other synchronously. The movable seat mechanism can be a seat plate structure driven by a drive device, such as a motor, electric push rod, or hydraulic pump. A guide rail or other walking guide device is provided between the seat plate structure and the base plate 1. The front clamping seats 2 and rear clamping seats 3 for clamping the front and rear ends of the basic arm are installed on the seat plate structure.

[0018] The structure of the front end of the basic arm is relatively simple. The front clamping seat 2 only needs to realize the positioning and clamping of the front end cylinder of the basic arm. Due to the setting of the tail plate at the rear end, the positioning and clamping between the tail plate and the cylinder needs to be considered. In order to realize the above functions, several tail plate pins 4 are installed on the rear clamping seat 3. Different tail plate pins 4 can correspond to the pin holes on the tail plates of various types of basic arms. The positioning and clamping of the tail plate is realized by moving the rear clamping seat 3 closer to it.

[0019] To prevent the tailplate from falling off, an electromagnet 5 is installed inside the rear clamping seat 3. When energized, the electromagnet 5 attracts the tailplate to the rear clamping seat 3, ensuring the positioning and alignment between the tailplate and the basic arm cylinder. To achieve clamping and positioning of tailplates with different shapes, a rotatable swing arm clamping frame 7 is hinged inside the rear clamping seat 3 via a swing cylinder 6. Several clamping cylinders 8 are installed inside the swing arm clamping frame 7, and each clamping cylinder 8 has a pressure seat 9 on its piston rod. The pressure seat 9 can extend to press and position the tailplate on the cylinder. The extension and retraction of the piston rod of the swing cylinder 6 can drive the swing arm clamping frame 7 to rotate, ensuring that the pressure seat 9 of the clamping cylinder 8 can press firmly on tailplates of different shapes.

[0020] To achieve tight clamping and limiting of the two ends of the basic boom of the truck-mounted crane along its length, a positioning frame 33 is installed on the front clamping mechanism and a positioning cylinder 34 is installed on the rear clamping mechanism. The positioning frame 33 and the positioning cylinder 34 are arranged correspondingly in the length direction of the base plate 1. By adjusting the relative position of the front clamping mechanism and the rear clamping mechanism, as well as the extension length of the piston rod of the positioning cylinder 34, it is possible to achieve tight clamping of the front and rear ends of the basic boom cylinder of different length types of truck-mounted cranes.

[0021] Furthermore, in order to achieve precise and stable movement of the mobile seat mechanism on the base plate 1, such as Figure 6 and Figure 7 As shown, the movable seat mechanism includes a traveling frame 10, on which a traveling motor 11 is mounted. A drive gear 12 is mounted on the output shaft of the traveling motor 11. Racks 13 and first slide rails 14 are provided on both sides of the base plate 1 along its length. The racks 13 mesh with the drive gears 12. A first slider 15, which cooperates with the first slide rails 14, is mounted on the traveling frame 10. When the traveling motor 11 is started, it can drive the traveling frame 10 to move along the length of the base plate 1, adjusting the relative positions between the front and rear clamping mechanisms as needed. When the traveling motor 11 is turned off, the front and rear clamping mechanisms are locked relative to each other on the base plate 1.

[0022] Furthermore, to ensure stable meshing between the rack 13 and the drive gear 12 and to prevent walking adjustment failure due to poor meshing, the walking frame 10 is equipped with a meshing anti-disengagement mechanism, such as... Figure 8 As shown, the engagement anti-disengagement mechanism includes a fixed seat 16 mounted on the walking frame 10. A movable seat 18, which can swing, is hinged to the fixed seat 16 via a vertical shaft 17. The walking motor 11 is mounted on the movable seat 18. A horizontally arranged sleeve 19 is also mounted on the walking frame 10. A nut 20 is provided at one end of the sleeve 19, and a bolt 21 is fitted into the nut 20. A spring 22 is provided between the sleeve 19 and the movable seat 18. The spring 22 always tends to press the drive gear 12 on the movable seat 18 against the rack 13. Rotating the bolt 21 can adjust the preload pressure of the spring 22 on the movable seat 18.

[0023] By adjusting the preload pressure of the spring 22 on the movable seat 18 by rotating the bolt 21, the meshing tightness between the drive gear 12 and the rack 13 can be flexibly adjusted. This design allows the present invention to adapt to basic arms of different sizes and weights, improving its applicability and flexibility.

[0024] Furthermore, in order to achieve relative movement and close proximity between the front clamping seat 2 and the rear clamping seat 3, and to complete the clamping and limiting of the end position of the truck-mounted crane's basic boom in the width direction, such as... Figure 9 As shown, a lead screw 23 is installed along the length of the walking frame 10. Two sets of nuts 24 with opposite directions of rotation are installed on the lead screw 23, and each nut 24 is equipped with a clamping plate 25. A clamping motor 26 is installed at one end of the walking frame 10. The output shaft of the clamping motor 26 is connected to the lead screw 23. Second slide rails 27 are installed on both sides of the walking frame 10 along its length. The clamping plates 25 are provided with second sliders 28 that cooperate with the second slide rails 27. When the clamping motor 26 is started, it can drive the clamping plates 25 on both sides to move closer or further away.

[0025] Two sets of front clamping seats 2 and two sets of rear clamping seats 3 are respectively installed on the clamping plates 25 of the front clamping mechanism and the rear clamping mechanism. When the clamping motor 26 is started, it can drive the two sets of front clamping seats 2 and the two sets of rear clamping seats 3 to move closer or further away, realizing the rapid clamping and release of the basic arm and greatly improving work efficiency.

[0026] Furthermore, the cylinder support mechanism includes a support gantry 29, with a crossbeam 30 at its bottom. The crossbeam 30 is located on the upper part of the base plate 1. Both ends of the bottom of the support gantry 29 are equipped with third sliders 31 that cooperate with the first slide rail 14, allowing the cylinder support mechanism to move along the length of the base plate 1. The cylinder support mechanism is adaptively adjusted according to the relative positions of the front and rear clamping mechanisms to ensure stable support for the upper basic arm. A pad 32 is also provided at the top of the support gantry 29, contacting the bottom of the basic arm cylinder. This pad provides a certain degree of cushioning during basic arm placement, preventing hard contact with the support gantry 29, ensuring the positioning and assembly quality of the basic arm, and effectively extending the service life of the assembly device.

[0027] The technical solution of this utility model is not limited to the scope of the embodiments described herein. All technical contents not described in detail herein are publicly known technologies.

Claims

1. A basic boom assembly device for a truck-mounted crane, characterized in that: It includes a base plate (1), on which a front clamping mechanism and a rear clamping mechanism that can move along the length direction are installed. A cylindrical support mechanism is installed on the base plate (1) between the front clamping mechanism and the rear clamping mechanism. The front clamping mechanism and the rear clamping mechanism can clamp and position the front and rear ends of the basic boom of the truck crane. The cylindrical support mechanism can support the bottom of the basic boom of the truck crane. Both the front clamping mechanism and the rear clamping mechanism include a moving seat mechanism. The moving seat mechanism of the front clamping mechanism is equipped with two sets of front clamping seats (2) that can move closer or further away at the same time. The moving seat mechanism of the rear clamping mechanism is equipped with two sets of rear clamping seats (3) that can move closer or further away at the same time. The rear clamping seat (3) is equipped with several tail plate pins (4). An electromagnet (5) is provided on the inner side of the rear clamping seat (3). A rotatable swing arm clamping frame (7) is hinged in the rear clamping seat (3) through a swing cylinder (6). Several clamping cylinders (8) are installed in the swing arm clamping frame (7). Each clamping cylinder (8) has a pressure seat (9) on its piston rod. The pressure seat (9) can extend to press and position the tail plate on the cylinder. A positioning frame (33) is installed on the front clamping mechanism. A positioning cylinder (34) is installed on the rear clamping mechanism. The positioning frame (33) and the positioning cylinder (34) are arranged correspondingly in the length direction of the base plate (1).

2. The basic boom assembly device for a truck-mounted crane according to claim 1, characterized in that: The moving seat mechanism includes a walking frame (10), a walking motor (11) is mounted on the walking frame (10), a drive gear (12) is mounted on the output shaft of the walking motor (11), a rack (13) and a first slide rail (14) are provided on both sides of the base plate (1) in the length direction, the rack (13) meshes with the drive gear (12), and a first slider (15) that cooperates with the first slide rail (14) is mounted on the walking frame (10).

3. The basic boom assembly device for a truck-mounted crane according to claim 2, characterized in that: The walking frame (10) is equipped with an engagement anti-detachment mechanism, which includes a fixed seat (16) on the walking frame (10), a movable seat (18) that can swing is hinged on the fixed seat (16) via a vertical shaft (17), a walking motor (11) is mounted on the movable seat (18), a horizontally arranged sleeve (19) is also installed on the walking frame (10), a nut (20) is provided at one end of the sleeve (19), a bolt (21) is fitted in the nut (20), a spring (22) is provided between the sleeve (19) and the movable seat (18), the spring (22) always tends to press the drive gear (12) on the movable seat (18) onto the rack (13), and rotating the bolt (21) can adjust the preload pressure of the spring (22) on the movable seat (18).

4. The basic boom assembly device for a truck-mounted crane according to claim 2, characterized in that: A lead screw (23) is installed in the longitudinal direction of the walking frame (10). Two sets of screw nuts (24) with opposite directions of rotation are installed on the lead screw (23). Each screw nut (24) is equipped with a clamping plate (25). A clamping motor (26) is installed at one end of the walking frame (10). The output shaft of the clamping motor (26) is connected to the lead screw (23). A second slide rail (27) is installed on both sides of the walking frame (10) in the longitudinal direction. A second slider (28) that cooperates with the second slide rail (27) is provided on the clamping plate (25). Two sets of front clamping seats (2) and two sets of rear clamping seats (3) are respectively installed on the clamping plates (25) of the front clamping mechanism and the rear clamping mechanism. When the clamping motor (26) is started, it can drive the two sets of front clamping seats (2) and the two sets of rear clamping seats (3) to move closer to or further away from each other.

5. The basic boom assembly device for a truck-mounted crane according to claim 2, characterized in that: The cylindrical support mechanism includes a support gantry (29), a crossbeam (30) is provided at the bottom of the support gantry (29), the crossbeam (30) is located on the upper part of the base plate (1), and a third slider (31) that cooperates with the first slide rail (14) is installed at both ends of the bottom of the support gantry (29). A pad (32) is also provided at the top of the support gantry (29).

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