Double-trolley bridge crane

Abstract

The utility model relates to the technical field of cranes, and provides a double-trolley bridge crane which comprises a travelling crane frame, sliding rails are mounted on two sides above the travelling crane frame, two support frames are arranged between the two sliding rails in a sliding manner, a disc is connected between the two support frames, a gear ring is rotationally matched in the disc, and a gear ring is arranged in the gear ring. A driving unit used for driving the gear ring to rotate is arranged on one side of the disc; a guide frame is arranged in the gear ring, a guide groove is formed in the guide frame, two mounting bases are arranged on the guide frame in a sliding mode, a main traveling crane and an auxiliary traveling crane are installed on the two mounting bases respectively, and a positioning unit used for limiting rotation of the driving gear is arranged on the other side of the disc; the driving unit drives the gear ring to rotate, so that the mounting seat on the guide frame rotates along with the gear ring, the angle direction of a product between the main travelling crane and the auxiliary travelling crane can be adjusted, the steps of needing an auxiliary rotating device are reduced, and the product transportation efficiency is improved.

Description

Technical Field

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

[0002] Bridge cranes are lifting equipment that spans across workshops, warehouses, and material yards for material handling. Because their ends rest on tall concrete pillars or metal supports, they resemble bridges. The bridge frame of a bridge crane runs longitudinally along rails laid on elevated structures on both sides, making full use of the space beneath the bridge frame for material handling without being obstructed by ground equipment. It is the most widely used and numerous type of lifting machinery.

[0003] A novel European-style double-girder double-trolley bridge crane, authorized by announcement number CN218290173U, includes a main trolley rail with a movable end beam on the rail. Two top beams are fixedly connected to the sides of the movable end beams. This bridge crane, through the coordinated arrangement of the main trolley rail, movable end beams, and limit boxes, can share the force on the movable end beam's own braking system during lifting. However, when using two trolleys to lift and transport equipment, the trolleys can only move longitudinally along the main girder or laterally along the crossbeams. For certain goods with special requirements, the orientation before lifting is inconsistent with the orientation after lifting and transport to the placement point, requiring a 180-degree rotation in the horizontal plane. For such requirements, existing cranes can only lift the equipment onto an auxiliary rotating device, rotate it horizontally by 180° on the auxiliary rotating device, and then lift it again to the designated location, resulting in a lengthy lifting process. Utility Model Content

[0004] The purpose of this utility model is to provide a double-trolley bridge crane to solve the technical problem that the existing crane trolleys can only run longitudinally along the main beam bridge or laterally along the crossbeam, and cannot rotate the goods.

[0005] The present invention adopts the following technical solution: a double trolley bridge crane, including a trolley frame, with slide rails installed on both sides above the trolley frame, two support frames slidably arranged between the two slide rails, a disc connected between the two support frames, a toothed ring rotating inside the disc, and a drive unit for rotating the toothed ring provided on one side of the disc.

[0006] The gear ring has a guide frame inside, and the guide frame has a guide groove inside. Two mounting seats are slidably arranged above the guide frame, and a main trolley and a secondary trolley are respectively mounted on the two mounting seats. A positioning unit for limiting the rotation of the drive gear is provided on the other side of the disc.

[0007] Preferably, a first drive rod and a second drive rod are rotatably installed in the guide groove of the guide frame, a first driver is installed at both ends of the guide frame, and two symmetrically arranged sliding plates are installed below the mounting base. Guide holes are opened at both ends of the sliding plates, and the first drive rod and the second drive rod are respectively located in the two guide holes.

[0008] Preferably, both the first drive rod and the second drive rod are lead screws, one of the guide holes is a through hole and is adapted to the diameter of the drive rod, and the other guide hole is a threaded hole and is threaded to the drive rod.

[0009] Preferably, the two guide holes on the sliding plates of the two mounting bases are in opposite positions.

[0010] Preferably, the drive unit includes a mounting cover fixed to one side of the disk, a second driver fixedly connected above the mounting cover, and a drive gear meshing with a gear ring for the rotation of the mounting cover. The output end of the second driver passes through the mounting cover and is connected to the drive gear.

[0011] Preferably, a transmission gear located inside the mounting cover is provided between the gear ring and the drive gear, and the diameter of the transmission gear is smaller than the diameter of the drive gear.

[0012] Preferably, the positioning unit includes two clamping plates slidably disposed above the interior of the disc, with a groove formed above the clamping plates and a rotating rod slidably disposed between the two grooves. A third driver is mounted above the disc, with the driving end of the third driver penetrating the disc and fixedly connected to the rotating rod. A protruding ring is provided above the toothed ring between the two clamping plates.

[0013] Preferably, the clamping plate is arc-shaped.

[0014] Preferably, a main hook and a secondary hook are respectively provided below the main trolley and the auxiliary trolley, and a rectangular hole is provided on the mounting base. The control cables of the main trolley and the auxiliary trolley pass through the rectangular hole and are connected to the main hook and the secondary hook respectively.

[0015] Preferably, the inner wall of the toothed ring is fixedly connected with four sets of symmetrically arranged mounting plates, and the two ends of the guide frame are respectively located between two adjacent sets of mounting plates. The mounting plates and the guide frame are fixedly connected by bolts.

[0016] The beneficial effects of this utility model are:

[0017] 1. By driving the gear ring to rotate through the drive unit, the mounting base on the guide frame rotates with the gear ring, thereby enabling the adjustment of the angle and direction of the products between the main trolley and the auxiliary trolley, changing from lateral to longitudinal, reducing the need for auxiliary rotation devices and improving the efficiency of product transportation.

[0018] 2. After the product angle adjustment is completed, the third driver drives the rotating rod to rotate, which reduces the distance between the two clamping plates, thereby clamping the convex ring with the two clamping plates to limit the position of the toothed ring. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the crane of this utility model;

[0020] Figure 2 This is a top view of the structure of the crane of this utility model;

[0021] Figure 3 This is a schematic diagram of the structure of the disc of this utility model;

[0022] Figure 4 This is a cross-sectional structural diagram of the disc of this utility model;

[0023] Figure 5 This is a schematic diagram of the toothed ring of this utility model;

[0024] Figure 6 This is a schematic diagram of the toothed ring of this utility model;

[0025] Figure 7 This is a schematic diagram of the positioning unit of this utility model.

[0026] In the picture:

[0027] 1. Crane frame; 2. Slide rail; 3. Support frame; 4. Disc; 5. Drive unit; 6. Positioning unit; 7. Main crane; 8. Auxiliary crane; 41. Guide frame; 42. Mounting seat; 43. Gear ring; 411. First drive rod; 412. Second drive rod; 413. First driver; 421. Sliding plate; 422. Guide hole; 423. Rectangular hole; 431. Mounting plate; 432. Convex ring; 51. Mounting cover; 52. Second driver; 53. Drive gear; 61. Third driver; 62. Clamping plate; 63. Rotating rod; 64. Slide groove; 71. Main hook; 81. Auxiliary hook. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0029] like Figures 1 to 7As shown, this utility model provides a double-trolley bridge crane, including a trolley frame 1. Slide rails 2 are installed on both sides of the upper part of the trolley frame 1. Two support frames 3 are slidably arranged between the two slide rails 2. A disc 4 is fixedly connected between the two support frames 3. A toothed ring 43 with an external rack is rotatably engaged inside the disc 4. The toothed ring 43 is coaxially arranged with the disc 4. A drive unit 5 for rotating the toothed ring 43 is arranged on the left side of the disc 4. A guide frame 41 is arranged inside the toothed ring 43. The guide frame 41 is rectangular. Two mounting seats 42 are slidably arranged above the guide frame 41. The bottom contacts the upper surface of the guide frame 41 to support the mounting base 42. A ball bearing may be provided above the guide frame 41 to reduce the friction between the guide frame 41 and the mounting base 42. The two mounting bases 42 are respectively equipped with the main trolley 7 and the auxiliary trolley 8. A positioning unit 6 for limiting the rotation of the drive gear 53 is provided on the right side of the disc 4. The main hook 71 and the auxiliary hook 81 are respectively provided below the main trolley 7 and the auxiliary trolley 8. A rectangular hole 423 is provided on the mounting base 42. The control cables on the main trolley 7 and the auxiliary trolley 8 pass through the rectangular hole 423 and are connected to the main hook 71 and the auxiliary hook 81 respectively.

[0030] In the above scheme, the product is first lifted by the main hook 71 and the auxiliary hook 81 on the main trolley 7 and the auxiliary trolley 8. The support frame 3 can adjust the position of the product left and right under the action of the slide rail 2. At the same time, the trolley frame 1 can slide back and forth to adjust the position of the product so that the product can be moved to the preset position. When the product needs to change from horizontal to vertical, the drive unit 5 drives the toothed ring 43 to rotate, so that the mounting seat 42 on the guide frame 41 rotates with the toothed ring 43. This enables the product to be adjusted at any angle between the main trolley 7 and the auxiliary trolley 8, solving the problem of needing manual adjustment, reducing the steps required for auxiliary rotation devices, and improving the transportation efficiency of the product.

[0031] The inner wall of the toothed ring 43 is fixedly connected with four sets of symmetrically arranged mounting plates 431. The two ends of the guide frame 41 are located between two adjacent sets of mounting plates 431. The mounting plates 431 and the guide frame 41 are fixedly connected by bolts to facilitate the installation or disassembly of the guide frame 41.

[0032] like Figure 4 to Figure 6As shown, in order to enable the main trolley 7 and the auxiliary trolley 8 to move independently on the guide frame 41 and adjust the distance between them, in this embodiment, a first drive rod 411 and a second drive rod 412 are rotatably mounted in the guide groove of the guide frame 41, respectively. The first drive rod 411 and the second drive rod 412 are arranged along the length of the guide frame 41. A first driver 413 is installed at both ends of the guide frame 41. The first driver 413 is a motor. The two first drivers 413 are respectively connected to the first drive rod 411 and the second drive rod 412. All 12 are lead screws. Two symmetrically arranged sliding plates 421 are installed below the mounting base 42. The two sliding plates 421 are located on both sides of the rectangular hole 423 to make way for the space below the rectangular hole 423, so as to facilitate the installation space of the cable. Guide holes 422 are opened at both ends of the sliding plate 421. The first drive rod 411 and the second drive rod 412 are respectively located in the two guide holes 422. One guide hole 422 is a through hole and is adapted to the diameter of the drive rod. The other guide hole 422 is a threaded hole and is threaded to the drive rod. The positions of the through hole and the threaded hole on the sliding plate 421 in the two mounting bases 42 are opposite.

[0033] In the above scheme, when the product is large, the position between the main trolley 7 and the auxiliary trolley 8 needs to be adjusted to adjust the center of gravity of the main trolley 7 and the auxiliary trolley 8 relative to the product. When the main trolley 7 moves left and right, since one of the guide holes 422 of the upper sliding plate 421 below the main trolley 7 is threadedly engaged with the first drive rod 411, and the other guide hole 422 is slidably engaged with the second drive rod 412, the first driver 413 acts as the driving source of the first drive rod 411, and the second drive rod 412 acts as the guide rod, so that the first drive rod 411 drives the main trolley 7 on the mounting base 42 to move through the sliding plate 421. When the auxiliary trolley 8 moves left and right, the position of the auxiliary trolley 8 needs to be adjusted in the same way, that is, the first drive rod 411 acts as the guide rod, and the second drive rod 412 acts as the driving source to drive the auxiliary trolley 8 to move. At the same time, the main trolley 7 and the auxiliary trolley 8 can also move in the same direction and relative to each other, increasing the usage scenarios of the main trolley 7 and the auxiliary trolley 8.

[0034] like Figure 3 and Figure 4As shown, in order to drive the gear ring 43 to rotate, in this embodiment, the drive unit 5 includes a mounting cover 51 fixed to one side of the disk 4. The mounting cover 51 communicates with the interior of the disk 4. A second driver 52 is fixedly connected to the top of the mounting cover 51. The second driver 52 is a motor. The rotation of the mounting cover 51 is provided by a drive gear 53 that meshes with the gear ring 43. The output end of the second driver 52 passes through the mounting cover 51 and is fixedly connected to the drive gear 53. In another embodiment, a transmission gear located inside the mounting cover 51 is provided between the gear ring 43 and the drive gear 53. The diameter of the transmission gear is smaller than the diameter of the drive gear 53 to increase the transmission torque between the gear ring 43 and the drive gear 53.

[0035] like Figure 5 and Figure 7 As shown, in order to stop immediately after the gear ring 43 rotates, in this embodiment, the positioning unit 6 includes two clamping plates 62 (sliding configuration is a common slide rail structure, not specifically shown in the figure) slidably disposed above the inside of the disc 4. The clamping plates 62 are arc-shaped, and a groove 64 is provided above the clamping plates 62. A rotating rod 63 is slidably disposed between the two grooves 64. A third driver 61 is installed on the upper right side of the disc 4. The third driver 61 is a motor. The driving end of the third driver 61 passes through the disc 4 and is fixedly connected to the rotating rod 63. A protruding ring 432 is provided above the gear ring 43 between the two clamping plates 62.

[0036] In the above scheme, when the product between the main trolley 7 and the auxiliary trolley 8 needs to rotate, the drive gear 53 rotates through the second driver 52, which drives the guide frame 41 on the gear ring 43 to rotate. The guide frame 41 drives the main trolley 7 and the auxiliary trolley 8 to rotate synchronously, so as to adjust the angle of the product. After the product angle adjustment is completed, due to the inertia of the gear ring 43, the gear ring 43 will inevitably continue to rotate. Therefore, the third driver 61 drives the rotating rod 63 to rotate, so that the distance between the two clamping plates 62 becomes smaller, thereby causing the two clamping plates 62 to clamp the convex ring 432, so as to limit the position of the gear ring 43.

[0037] The working principle of this utility model:

[0038] The product is first lifted by the main hook 71 and the auxiliary hook 81 on the main trolley 7 and the auxiliary trolley 8. The support frame 3 transports the product left and right under the action of the slide rail 2. At the same time, the product can be transported back and forth through the trolley frame 1.

[0039] When the product needs to change from horizontal to vertical, the drive gear 53 rotates through the second driver 52, which in turn drives the guide frame 41 on the gear ring 43 to rotate. The guide frame 41 drives the main trolley 7 and the auxiliary trolley 8 to rotate synchronously, so as to adjust the angle of the product and solve the problem of needing manual adjustment.

[0040] When the position between the main tractor 7 and the auxiliary tractor 8 needs to be adjusted, since one of the guide holes 422 of the upper sliding plate 421 below the main tractor 7 is threadedly engaged with the first drive rod 411, and the other guide hole 422 is slidably engaged with the second drive rod 412, the first driver 413 drives the first drive rod 411 as the drive source and the second drive rod 412 as the support rod, thereby causing the first drive rod 411 to drive the main tractor 7 on the mounting base 42 to move through the sliding plate 421; when the position of the auxiliary tractor 8 needs to be adjusted, the first drive rod 411 acts as the guide rod and the second drive rod 412 acts as the drive source to drive the auxiliary tractor 8 to move.

[0041] After the product angle adjustment is completed, due to the inertia of the toothed ring 43, the toothed ring 43 will inevitably continue to rotate. Therefore, the third driver 61 drives the rotating rod 63 to rotate, which reduces the distance between the two clamping plates 62, thereby clamping the convex ring 432 with the two clamping plates 62 to limit the position of the toothed ring 43.

[0042] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A double-trolley bridge crane, comprising a trolley frame, wherein slide rails are mounted on both upper sides of the trolley frame, characterized in that: Two support frames are slidably arranged between the two slide rails, and a disc is connected between the two support frames. A toothed ring is rotatably engaged inside the disc, and a drive unit for rotating the toothed ring is provided on one side of the disc. The gear ring has a guide frame inside, and the guide frame has a guide groove inside. Two mounting seats are slidably arranged above the guide frame, and a main trolley and a secondary trolley are respectively mounted on the two mounting seats. A positioning unit for limiting the rotation of the drive gear is provided on the other side of the disc.

2. The double-trolley bridge crane according to claim 1, characterized in that: The guide frame has a first drive rod and a second drive rod rotatably mounted in the guide groove. The guide frame has a first driver installed at both ends. The mounting base has two symmetrically arranged sliding plates installed below it. The sliding plates have guide holes at both ends. The first drive rod and the second drive rod are located in the two guide holes respectively.

3. The double-trolley bridge crane according to claim 2, characterized in that: Both the first and second drive rods are lead screws, one of which has a through hole that matches the diameter of the drive rod, and the other has a threaded hole that is threaded into the drive rod.

4. The double-trolley bridge crane according to claim 3, characterized in that: The two guide holes on the sliding plates of the two mounting bases are in opposite positions.

5. The double-trolley bridge crane according to claim 1, characterized in that: The drive unit includes a mounting cover fixed to one side of the disk, a second driver fixedly connected above the mounting cover, and a drive gear that meshes with a gear ring for rotation of the mounting cover. The output end of the second driver passes through the mounting cover and is connected to the drive gear.

6. The double-trolley bridge crane according to claim 5, characterized in that: A transmission gear is provided between the gear ring and the drive gear, located inside the mounting cover. The diameter of the transmission gear is smaller than that of the drive gear.

7. The double-trolley bridge crane according to claim 6, characterized in that: The positioning unit includes two clamping plates slidably disposed above the inside of the disc. A groove is provided above the clamping plates, and a rotating rod is slidably disposed between the two grooves. A third driver is installed above the disc, and the driving end of the third driver passes through the disc and is fixedly connected to the rotating rod. A protruding ring is provided above the toothed ring between the two clamping plates.

8. The double-trolley bridge crane according to claim 7, characterized in that: The clamping plate is arc-shaped.

9. The double-trolley bridge crane according to claim 1, characterized in that: The main trolley and the auxiliary trolley are respectively provided with a main hook and an auxiliary hook below them. The mounting base has a rectangular hole, through which the control cables of the main trolley and the auxiliary trolley pass and are connected to the main hook and the auxiliary hook respectively.

10. The double-trolley bridge crane according to claim 1, characterized in that: The inner wall of each gear ring is fixedly connected with four sets of symmetrically arranged mounting plates. The two ends of the guide frame are located between two adjacent sets of mounting plates, and the mounting plates and the guide frame are fixedly connected by bolts.

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