A crane boom and crane

Abstract

This utility model relates to the field of crane technology, specifically a crane boom and crane. It includes a movable base, a mounting base, a first telescopic rod assembly, a second telescopic rod assembly, a lifting device, a third telescopic rod assembly, and an adjustable counterweight device. A movable chassis is mounted on the bottom of the movable base; the mounting base is mounted above the movable base, and pressure sensors are mounted at both ends of the bottom of the mounting base; the first telescopic rod assembly is vertically mounted on the mounting base; the second telescopic rod assembly is connected to the upper end of the first telescopic rod assembly; the lifting device is mounted on the outer end of the second telescopic rod assembly; the third telescopic rod assembly is slidably mounted on the second telescopic rod assembly, and a first drive assembly for driving the movement of the third telescopic rod assembly is mounted on the second telescopic rod assembly; the adjustable counterweight device is mounted on the outer end of the third telescopic rod assembly. This technical solution features high stability, reducing the probability of machine tipping over.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, and in particular to a crane boom and a crane. Background Technology

[0002] Cranes are mechanical equipment widely used in construction, logistics, and other fields, primarily for lifting and moving heavy objects. The crane boom, as its core component, directly determines the equipment's operating range, load-bearing capacity, and stability. Traditional crane boom structures mainly include various forms such as telescopic booms and truss booms, achieving luffing and telescopic functions through hydraulic or mechanical drives.

[0003] However, in actual operation, especially when lifting large or asymmetrical heavy objects, the stability of the crane boom and the whole machine faces severe challenges. One of the most prominent problems is the risk of equipment tipping over due to the imbalance of forces on both sides. During lifting operations, when the center of gravity of the lifted heavy object deviates from the center line of the crane support base, an uneven load distribution will occur on the crane boom and support structure. Utility Model Content

[0004] The purpose of this utility model is to address the problems existing in the background art by proposing a crane boom and a crane.

[0005] The technical solution of this utility model is a crane boom and a crane, comprising:

[0006] A mobile base, with a mobile chassis mounted at its bottom;

[0007] The mounting base is installed above the movable base, and pressure sensors are installed at both ends of the bottom of the mounting base.

[0008] The first telescopic rod assembly is vertically mounted on the mounting base;

[0009] The second telescopic rod assembly is connected to the upper end of the first telescopic rod assembly;

[0010] The hoisting device is installed at the outer end of the second telescopic rod assembly;

[0011] The third telescopic rod assembly is slidably mounted on the second telescopic rod assembly, and the second telescopic rod assembly is equipped with a first drive assembly for driving the third telescopic rod assembly to move.

[0012] An adjustable counterweight device is installed at the outer end of the third telescopic rod assembly.

[0013] Preferably, it also includes a stabilizing support mechanism, which includes a second drive assembly, two upper sliding rods, two lower sliding rods, and four support pillars. The movable base has upper sliding holes extending through its front and rear sides, and lower sliding holes extending through its left and right sides. The upper sliding holes are located above and communicate with the lower sliding holes. The two upper sliding rods are slidably mounted inside the upper sliding holes, and the two lower sliding rods are slidably mounted inside the lower sliding holes. The four support pillars are respectively connected to the ends of the two upper sliding rods and the two lower sliding rods, and the four support pillars are respectively located around the movable base. The second drive assembly includes a fourth servo motor, two gears, and four racks. The fourth servo motor is mounted on the movable base, the two gears are mounted on the shaft of the fourth servo motor, and the four racks are respectively mounted on the two upper sliding rods and the two lower sliding rods. The upper gear meshes with the two upper racks, and the lower gear meshes with the two lower racks.

[0014] Preferably, the first telescopic rod assembly includes a first sleeve, a first movable column, and a hydraulic cylinder. The first sleeve is mounted on a mounting base, the bottom end of the first movable column is slidably mounted inside the first sleeve, and the hydraulic cylinder is mounted inside the first sleeve with its output shaft connected to the first movable column.

[0015] Preferably, the second telescopic rod assembly includes a second sleeve, a second movable column, a second servo motor, and a second threaded rod. The second sleeve is connected to the upper end of the first movable column, the end of the second movable column is slidably mounted on the inner side of the second sleeve, the second servo motor is mounted on the outer end of the second sleeve, the second threaded rod is rotatably mounted on the inner side of the second sleeve, the second threaded rod is connected to the output shaft of the second servo motor, and the second movable column is threadedly connected to the second threaded rod.

[0016] Preferably, the third telescopic rod assembly includes a third sleeve, a third movable column, a first servo motor, and a first threaded rod. The third sleeve is slidably mounted on the second sleeve, the end of the third movable column is slidably disposed inside the third sleeve, the first servo motor is mounted on the outer end of the third sleeve, the first threaded rod is rotatably mounted inside the third sleeve and threadedly connected to the third movable column, and the output shaft of the first servo motor is connected to the first threaded rod.

[0017] Preferably, the adjustable counterweight device includes a water storage tank and a pump. The water storage tank is connected to the outer end of the third movable column. The pump is installed on the water storage tank. A cavity for water storage is provided inside the movable seat. A first hose is connected between the pump input end and the cavity. A water outlet pipe is connected between the pump output end and the water storage tank. A second hose is connected between the bottom end of the water storage tank and the cavity. A solenoid valve is installed on the second hose.

[0018] Preferably, the hoisting device includes a servo geared motor, a winding reel, a high-strength steel wire rope, and a hook. The outer end of the second movable column is connected to a motor platform. The servo geared motor is mounted on the motor platform, and the output shaft of the servo geared motor is connected to the winding reel. The high-strength steel wire rope movably passes through the motor platform, with its upper end fixed to the winding reel and its lower end connected to the hook.

[0019] Preferably, the first drive assembly includes a third servo motor and a third threaded rod. The third servo motor is mounted on the second sleeve, the third threaded rod is connected to the output shaft of the third servo motor, and a connecting slider is connected to the third sleeve. The connecting slider is threadedly connected to the third threaded rod.

[0020] Preferably, a rotating seat is mounted on the movable seat, one end of the mounting seat is rotatably mounted on the rotating seat, and the other end of the mounting seat has a detachable connection with the movable seat.

[0021] Compared with the prior art, the present invention has the following beneficial technical effects:

[0022] In this technical solution, two pressure sensors can detect pressure changes at both ends of the mounting base. When the pressure on the side adjacent to the hoisting device is significantly greater than the pressure on the other side, the length of the resistance arm is increased by driving the third telescopic component to extend or by driving the third telescopic component to move outward through the first drive component. This makes the pressure sensors at both ends of the mounting base closer together, thereby stabilizing the equipment and greatly ensuring the safe operation of the crane and preventing it from tipping over. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model.

[0024] Figure 2 This is a cross-sectional view of the first sleeve in this utility model.

[0025] Figure 3 This is a cross-sectional view of the second and third sleeves in this utility model.

[0026] Figure 4 This is a structural diagram showing the connection relationship between the movable base and the mounting base in this utility model.

[0027] Figure 5 This is a schematic diagram of the movable base in this utility model.

[0028] Figure 6 This is a cross-sectional view of the movable seat in this utility model.

[0029] Reference numerals: 1. Moving seat; 101. Upper sliding hole; 102. Lower sliding hole; 2. Mounting seat; 3. Rotating seat; 41. First sleeve; 42. First movable column; 51. Second sleeve; 52. Second movable column; 53. Motor platform; 61. Servo geared motor; 62. Reel; 63. High-strength steel wire rope; 7. Hook; 81. Third sleeve; 82. Third movable column; 9. Water tank; 10. Connecting block; 11. Limiting column; 12. Limiting block; 13. Moving... 141. Moving chassis; 142. First servo motor; 151. Second servo motor; 152. Second threaded rod; 16. Hydraulic cylinder; 17. Pump; 171. First hose; 172. Water outlet pipe; 18. Second hose; 19. Solenoid valve; 20. Support column; 21. Upper slide rod; 22. Lower slide rod; 23. Rack; 24. Gear; 251. Third servo motor; 252. Third threaded rod; 26. Fourth servo motor; 27. Pressure sensor. Detailed Implementation

[0030] Example 1

[0031] like Figures 1-4 As shown in the figure, the crane boom and crane proposed in this embodiment include a movable seat 1, a mounting seat 2, a first telescopic rod assembly, a second telescopic rod assembly, a hoisting device, a third telescopic rod assembly, and an adjustable counterweight device.

[0032] The bottom of the mobile seat 1 is equipped with a mobile chassis 13, which is a "drive-by-wire chassis" or "electric control chassis". Its core feature is a complete drive-by-wire system, such as steering, braking and driving operation.

[0033] Mounting base 2 is installed above movable base 1. Movable base 1 is equipped with rotating base 3. One end of mounting base 2 is rotatably mounted on rotating base 3. The other end of mounting base 2 is detachably connected to movable base 1. Limiting post 11 is connected to movable base 1. One end of mounting base 2 away from rotating base 3 is connected to connecting block 10. Connecting block 10 has a round hole. Limiting block 12 is detachably connected to the upper end of limiting post 11. Limiting block 12 and limiting post 11 are detachably connected by bolts, nuts or screws. Pressure sensors 27 are installed at both ends of the bottom of mounting base 2.

[0034] The first telescopic rod assembly is vertically mounted on the mounting base 2. The first telescopic rod assembly includes a first sleeve 41, a first movable column 42, and a hydraulic cylinder 16. The first sleeve 41 is mounted on the mounting base 2. The bottom end of the first movable column 42 is slidably mounted inside the first sleeve 41. The hydraulic cylinder 16 is mounted inside the first sleeve 41 and its output shaft is connected to the first movable column 42.

[0035] The second telescopic rod assembly is connected to the upper end of the first telescopic rod assembly. The second telescopic rod assembly includes a second sleeve 51, a second movable column 52, a second servo motor 151, and a second threaded rod 152. The second sleeve 51 is connected to the upper end of the first movable column 42. The end of the second movable column 52 is slidably mounted on the inner side of the second sleeve 51. The second servo motor 151 is mounted on the outer end of the second sleeve 51. The second threaded rod 152 is rotatably mounted on the inner side of the second sleeve 51. The second threaded rod 152 is connected to the output shaft of the second servo motor 151. The second movable column 52 is threadedly connected to the second threaded rod 152.

[0036] The hoisting device is installed at the outer end of the second telescopic rod assembly. The hoisting device includes a servo geared motor 61, a winding reel 62, a high-strength steel wire rope 63, and a hook 7. The outer end of the second movable column 52 is connected to a motor platform 53. The servo geared motor 61 is installed on the motor platform 53. The output shaft of the servo geared motor 61 is connected to the winding reel 62. A rotating bracket is installed on the motor platform 53. The winding reel 62 is rotatably installed on the rotating bracket. The high-strength steel wire rope 63 moves through the motor platform 53. The upper end of the high-strength steel wire rope 63 is fixed on the winding reel 62, and its lower end is connected to the hook 7.

[0037] The third telescopic rod assembly is slidably mounted on the second telescopic rod assembly. The second telescopic rod assembly is equipped with a first drive assembly for driving the third telescopic rod assembly to move. The first drive assembly includes a third servo motor 251 and a third threaded rod 252. The third servo motor 251 is mounted on the second sleeve 51, and the third threaded rod 252 is connected to the output shaft of the third servo motor 251. A connecting slider is connected to the third sleeve 81, and the connecting slider is threadedly connected to the third threaded rod 252. The third telescopic rod assembly includes a third sleeve 81, a third movable column 82, a first servo motor 141, and a first threaded rod 142. The third sleeve 81 is slidably mounted on the second sleeve 51. The end of the third movable column 82 is slidably disposed inside the third sleeve 81. The first servo motor 141 is mounted on the outer end of the third sleeve 81. The first threaded rod 142 is rotatably mounted inside the third sleeve 81 and threadedly connected to the third movable column 82. The output shaft of the first servo motor 141 is connected to the first threaded rod 142.

[0038] An adjustable counterweight device is installed at the outer end of the third telescopic rod assembly. The adjustable counterweight device includes a water storage tank 9 and a pump 17. The water storage tank 9 is connected to the outer end of the third movable column 82. The pump 17 is installed on the water storage tank 9. A cavity for water storage is provided in the movable seat 1. A first hose 171 is connected between the input end of the pump 17 and the cavity. A water outlet pipe 172 is connected between the output end of the pump 17 and the water storage tank 9. A second hose 18 is connected between the bottom end of the water storage tank 9 and the cavity. A solenoid valve 19 is installed on the second hose 18.

[0039] During hoisting operations, the hook 7 is connected to the hanging ring or rope to hoist the heavy object. The object is slowly lifted. During this process, the two pressure sensors 27 can detect the pressure changes at both ends of the mounting base 2. It should be noted that this technical solution also includes a PLC controller. When the pressure on one side of the hoisting device is significantly greater than the pressure on the other side, the third telescopic component is extended or the third telescopic component is moved outward by the first drive component to increase the length of the resistance arm, so that the pressure sensors 27 at both ends of the mounting base 2 are close together, thereby stabilizing the equipment. It should also be noted that when the heavy object is about to separate from the ground or has just separated from the ground, the detection values ​​of the two pressure sensors 27 must be close; otherwise, the heavy object cannot be lifted. Through the above-mentioned structural design, the operating safety of the crane is greatly ensured, preventing it from tipping over.

[0040] Example 2

[0041] like Figure 5 and Figure 6 As shown, this embodiment of the crane boom and crane, compared to embodiment one, further includes a stabilizing support mechanism. The stabilizing support mechanism includes a second drive assembly, two upper sliding rods 21, two lower sliding rods 22, and four support columns 20. The movable base 1 has upper sliding holes 101 penetrating its front and rear sides, and lower sliding holes 102 penetrating its left and right sides. The upper sliding holes 101 are located above and communicate with the lower sliding holes 102. Both upper sliding rods 21 are slidably installed inside the upper sliding holes 101, and both lower sliding rods 22 are slidably installed inside the lower sliding holes 102. On the side, four pillars 20 are respectively connected to the ends of two upper sliding rods 21 and two lower sliding rods 22, and the four pillars 20 are respectively located around the movable seat 1; the second drive assembly includes a fourth servo motor 26, two gears 24 and four racks 23, wherein the fourth servo motor 26 is mounted on the movable seat 1, the two gears 24 are both mounted on the rotating shaft of the fourth servo motor 26, and the four racks 23 are respectively mounted on the two upper sliding rods 21 and the two lower sliding rods 22, wherein the upper gear 24 meshes with the two upper racks 23, and the lower gear 24 meshes with the two lower racks 23.

[0042] In this embodiment, when the heavy object is lifted, the fourth servo motor 26 can be started to work. The fourth servo motor 26 drives the two gears 24 to rotate synchronously, thereby driving the four racks 23 to move, so that the multiple pillars 20 move outward synchronously, thereby increasing the support range of the moving seat 1 and further improving the stability of the device.

[0043] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A crane boom and a crane, characterized in that, include: Mobile seat (1), with a mobile chassis (13) installed at the bottom of the mobile seat (1); Mounting base (2), which is mounted above the movable base (1), and pressure sensors (27) are installed at both ends of the bottom of the mounting base (2); The first telescopic rod assembly is vertically mounted on the mounting base (2); The second telescopic rod assembly is connected to the upper end of the first telescopic rod assembly; The hoisting device is installed at the outer end of the second telescopic rod assembly; The third telescopic rod assembly is slidably mounted on the second telescopic rod assembly, and the second telescopic rod assembly is equipped with a first drive assembly for driving the third telescopic rod assembly to move. An adjustable counterweight device is installed at the outer end of the third telescopic rod assembly.

2. A crane boom and crane according to claim 1, characterized in that, It also includes a stabilizing support mechanism, which includes a second drive assembly, two upper sliding rods (21), two lower sliding rods (22), and four support pillars (20). The movable seat (1) has an upper sliding hole (101) that runs through its front and rear sides, and the movable seat (1) also has a lower sliding hole (102) that runs through its left and right sides. The upper sliding hole (101) is located above the lower sliding hole (102) and communicates with it. The two upper sliding rods (21) are slidably installed inside the upper sliding hole (101), and the two lower sliding rods (22) are slidably installed inside the lower sliding hole (102). The four support pillars (20) are respectively connected to the two upper sliding rods (21). The two slide bars (22) are connected to the ends of the slide bars (22), and the four pillars (20) are located around the movable seat (1) respectively. The second drive assembly includes a fourth servo motor (26), two gears (24) and four racks (23). The fourth servo motor (26) is mounted on the movable seat (1), the two gears (24) are mounted on the shaft of the fourth servo motor (26), and the four racks (23) are mounted on the two upper slide bars (21) and the two lower slide bars (22) respectively. The upper gear (24) meshes with the two upper racks (23), and the lower gear (24) meshes with the two lower racks (23).

3. A crane boom and crane according to claim 1, characterized in that, The first telescopic rod assembly includes a first sleeve (41), a first movable column (42), and a hydraulic cylinder (16). The first sleeve (41) is mounted on the mounting base (2), the bottom end of the first movable column (42) is slidably mounted inside the first sleeve (41), and the hydraulic cylinder (16) is mounted inside the first sleeve (41) and its output shaft is connected to the first movable column (42).

4. A crane boom and crane according to claim 3, characterized in that, The second telescopic rod assembly includes a second sleeve (51), a second movable column (52), a second servo motor (151), and a second threaded rod (152). The second sleeve (51) is connected to the upper end of the first movable column (42). The end of the second movable column (52) is slidably mounted on the inner side of the second sleeve (51). The second servo motor (151) is mounted on the outer end of the second sleeve (51). The second threaded rod (152) is rotatably mounted on the inner side of the second sleeve (51). The second threaded rod (152) is connected to the output shaft of the second servo motor (151). The second movable column (52) is threadedly connected to the second threaded rod (152).

5. A crane boom and crane according to claim 4, characterized in that, The third telescopic rod assembly includes a third sleeve (81), a third movable column (82), a first servo motor (141), and a first threaded rod (142). The third sleeve (81) is slidably mounted on the second sleeve (51). The end of the third movable column (82) is slidably disposed inside the third sleeve (81). The first servo motor (141) is mounted on the outer end of the third sleeve (81). The first threaded rod (142) is rotatably mounted inside the third sleeve (81) and threadedly connected to the third movable column (82). The output shaft of the first servo motor (141) is connected to the first threaded rod (142).

6. A crane boom and crane according to claim 5, characterized in that, The adjustable counterweight device includes a water storage tank (9) and a pump (17). The water storage tank (9) is connected to the outer end of the third movable column (82). The pump (17) is installed on the water storage tank (9). A cavity for water storage is provided in the movable seat (1). A first hose (171) is connected between the input end of the pump (17) and the cavity. A water outlet pipe (172) is connected between the output end of the pump (17) and the water storage tank (9). A second hose (18) is connected between the bottom end of the water storage tank (9) and the cavity. A solenoid valve (19) is installed on the second hose (18).

7. A crane boom and crane according to claim 6, characterized in that, The hoisting device includes a servo geared motor (61), a winding reel (62), a high-strength steel wire rope (63), and a hook (7). The outer end of the second movable column (52) is connected to a motor platform (53). The servo geared motor (61) is mounted on the motor platform (53). The output shaft of the servo geared motor (61) is connected to the winding reel (62). The high-strength steel wire rope (63) moves through the motor platform (53). The upper end of the high-strength steel wire rope (63) is fixed on the winding reel (62), and its lower end is connected to the hook (7).

8. A crane boom and crane according to claim 4, characterized in that, The first drive assembly includes a third servo motor (251) and a third threaded rod (252). The third servo motor (251) is mounted on the second sleeve (51), and the third threaded rod (252) is connected to the output shaft of the third servo motor (251). A connecting slider is connected to the third sleeve (81), and the connecting slider is threadedly connected to the third threaded rod (252).

9. A crane boom and crane according to claim 1, characterized in that, A rotating seat (3) is mounted on the movable seat (1). One end of the mounting seat (2) is rotatably mounted on the rotating seat (3), and the other end of the mounting seat (2) has a detachable connection with the movable seat (1).

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