Height-adjustable dock leveler

Abstract

The utility model discloses a height-adjustable dock leveler which comprises a movable base and is characterized in that self-locking movable wheels which are symmetrically distributed are arranged on the lower surface of the movable base, fixing blocks which are symmetrically distributed are fixedly connected to the upper surface of the movable base, and a bridge body is hinged to the opposite surfaces of the two fixing blocks through pin shafts; one end of the bridge body is hinged with a swing plate, and the upper surface of the bridge body is fixedly connected with guardrails which are symmetrically distributed. According to the adjusting device, the height of the dock leveler is adjusted, so that the dock leveler can be conveniently used for transportation carriages with different heights, the purchase cost is reduced, and the practicability is high. The problems that multiple dock levelers with different heights need to be purchased to be matched with transportation carriages with different heights for use, the purchase cost is increased, and the transportation space is greatly occupied are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of boarding ramps, in particular to a boarding ramp with adjustable height. Background Art

[0002] The loading and unloading platform is a very common structural form in modern logistics sites. It is the starting point and end point of the enterprise's logistics chain. It is a loading and unloading operation platform for the enterprise to quickly and safely turn over products and goods. The height of the loading and unloading operation platform is fixed, but the height of the carriages coming and going from the transport carriages is different. There is always a certain height difference or gap between the transport vehicles and the loading and unloading platform, which makes it impossible for the forklift to enter and exit the transport vehicles to directly load and unload goods. Therefore, the boarding bridge appeared. The boarding bridge is a bridging device between the forklift and the truck to facilitate loading and unloading of goods. The loading and unloading platform is a very common structural form in modern logistics sites. There is always a certain height difference or gap between the transport vehicles and the loading and unloading platform, which makes it impossible for the forklift to enter and exit the transport vehicles to directly load and unload goods. The use of the boarding bridge provides a reliable connection, so that the forklift can safely and quickly enter and exit the transport vehicles for loading and unloading operations. With the development of technology, some small-sized boarding bridges have been developed towards lightweight.

[0003] In order to achieve lightweight, most of the existing loading ramps are of one-piece structure and are moved by self-locking wheels at the bottom. Although it is convenient to use, when transporting carriages of different heights, loading ramps of different heights are required. Therefore, it is necessary to equip a variety of loading ramps of different heights, which not only greatly increases the purchase cost, but also greatly takes up transportation space. Utility Model Content

[0004] The purpose of the utility model is to provide a height-adjustable boarding ramp to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a height-adjustable boarding bridge, comprising a mobile base, characterized in that: the lower surface of the mobile base is provided with symmetrically distributed self-locking moving wheels, the upper surface of the mobile base is fixedly connected with symmetrically distributed fixed blocks, the opposite surfaces of the two fixed blocks are hinged with a bridge body through a pin shaft, one end of the bridge body is hinged with a swing plate, and the upper surface of the bridge body is fixedly connected with symmetrically distributed guardrails;

[0006] An adjusting device is arranged on the upper surface of the movable base, and the adjusting device comprises a first support, and a lower surface of the first support is fixedly connected to the upper surface of the movable base.

[0007] Preferably, a storage sleeve is hinged on the inner wall of the first support via a pin shaft, an annular limiting sliding groove is provided on the upper surface of the storage sleeve, and arc-shaped sliding blocks distributed in a ring array are slidably connected to the inner wall of the annular limiting sliding groove.

[0008] Preferably, the upper surfaces of the plurality of arc-shaped sliding blocks are fixedly connected with threaded rings, the lower surfaces of the threaded rings are in contact with the upper surface of the storage sleeve, and the outer surfaces of the threaded rings are fixedly connected with driving handles distributed in a ring array.

[0009] Preferably, the inner wall of the threaded ring is threadedly connected with a screw rod, one end of the screw rod extends to the interior of the storage sleeve, and the other end of the screw rod is hinged to a second support via a pin.

[0010] Preferably, the upper surface of the second support is fixedly connected to the lower surface of the bridge body, the upper surface of the movable base is fixedly connected to a symmetrically distributed third support, and the inner wall of the third support is hinged with a fixed sleeve.

[0011] Preferably, a telescopic rod is movably sleeved on the inner wall of the fixed sleeve, one end of the telescopic rod is hinged to a fourth support via a pin, and the upper surfaces of the two fourth supports are fixedly connected to the lower surface of the bridge body.

[0012] Preferably, the outer surface of the telescopic rod is provided with positioning holes distributed in a linear array, the outer surface of the fixing sleeve is provided with a threaded hole, the inner wall of the threaded hole is threadedly connected with a hand bolt, and one end of the hand bolt passes through and extends into the interior of one of the positioning holes.

[0013] Compared with the prior art, the beneficial effect of the utility model is that the adjusting device can adjust the height of the boarding bridge, thereby facilitating the use of transport carriages of different heights, reducing the purchase cost, and solving the problem of needing to purchase a variety of boarding bridges of different heights to equip transport carriages of different heights, which not only increases the purchase cost but also greatly occupies the transportation space. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 A three-dimensional diagram of a fixed sleeve structure of a height-adjustable boarding ramp proposed by the utility model;

[0016] Figure 3 A three-dimensional diagram of a storage sleeve structure of a height-adjustable boarding ramp proposed by the utility model;

[0017] Figure 4A partial exploded view of the storage sleeve structure of a height-adjustable boarding ramp proposed in the utility model.

[0018] In the figure: 1. mobile base; 2. self-locking mobile wheel; 3. fixed block; 4. bridge body; 5. swing plate; 6. guardrail; 7. first support; 71. storage sleeve; 72. annular limit slide groove; 73. arc-shaped slider; 74. threaded ring; 75. driving handle; 76. screw; 77. second support; 78. third support; 79. fixed sleeve; 710. telescopic rod; 711. fourth support; 712. positioning hole; 713. threaded hole; 714. hand-tightened bolt. DETAILED DESCRIPTION

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

[0020] See also Figure 1-Figure 4 The utility model provides a technical solution: a height-adjustable boarding bridge, comprising a mobile base 1, characterized in that: the lower surface of the mobile base 1 is provided with symmetrically distributed self-locking moving wheels 2, the upper surface of the mobile base 1 is fixedly connected with symmetrically distributed fixing blocks 3, the opposite surfaces of the two fixing blocks 3 are hinged with a bridge body 4 through a pin shaft, one end of the bridge body 4 is hinged with a swing plate 5, and the upper surface of the bridge body 4 is fixedly connected with symmetrically distributed guardrails 6;

[0021] An adjusting device is disposed on the upper surface of the movable base 1 , and the adjusting device comprises a first support 7 , and a lower surface of the first support 7 is fixedly connected to the upper surface of the movable base 1 .

[0022] Furthermore, the inner wall of the first support 7 is hinged with a storage sleeve 71 through a pin shaft, and the upper surface of the storage sleeve 71 is provided with an annular limiting groove 72. The inner wall of the annular limiting groove 72 is slidably connected with an arc-shaped slider 73 distributed in a ring array. The self-locking moving wheel 2 serves to facilitate the movement of the mobile base 1, the guardrail 6 serves to protect the two ends of the bridge body 4, and the swing plate 5 serves to connect the distance between the bridge body 4 and one end of the ground to ensure a smooth transition.

[0023] Furthermore, the upper surfaces of the multiple arc-shaped sliders 73 are fixedly connected with threaded rings 74, the lower surfaces of the threaded rings 74 are in contact with the upper surface of the storage sleeve 71, and the outer surfaces of the threaded rings 74 are fixedly connected with driving handles 75 distributed in a ring array. The threaded rings 74 play a role of positioning and rotation through the limiting cooperation of the arc-shaped sliders 73, and the driving handles 75 facilitate the rotation of the threaded rings 74.

[0024] Furthermore, the inner wall of the threaded ring 74 is threadedly connected to a screw rod 76, one end of the screw rod 76 extends to the interior of the storage sleeve 71, and the other end of the screw rod 76 is hinged to a second support 77 through a pin shaft. The rotation of the threaded ring 74 drives the screw rod 76 to telescopically move through the cooperation of the second support 77.

[0025] Furthermore, the upper surface of the second support 77 is fixedly connected to the lower surface of the bridge body 4, and the upper surface of the movable base 1 is fixedly connected to a symmetrically distributed third support 78, and the inner wall of the third support 78 is hinged with a fixed sleeve 79, and the third support 78 cooperates with the fixed sleeve 79 to perform a swinging motion.

[0026] Furthermore, a telescopic rod 710 is movably sleeved on the inner wall of the fixed sleeve 79, and one end of the telescopic rod 710 is hinged to a fourth support 711 through a pin shaft. The upper surfaces of the two fourth supports 711 are fixedly connected to the lower surface of the bridge body 4. The telescopic rod 710 plays a role of telescopic movement in the fixed sleeve 79, and the telescopic movement of the telescopic rod 710 cooperates with the fourth support 711 to play a role of height adjustment along with the bridge body 4.

[0027] Furthermore, the outer surface of the telescopic rod 710 is provided with positioning holes 712 distributed in a linear array, and the outer surface of the fixing sleeve 79 is provided with a threaded hole 713. The inner wall of the threaded hole 713 is threadedly connected with a hand bolt 714. One end of the hand bolt 714 passes through and extends to the interior of one of the positioning holes 712. The rotation of the hand bolt 714 allows it to be inserted into the interior of one of the positioning holes 712 through the cooperation of the threaded hole 713, thereby achieving the limitation of the telescopic rod 710.

[0028] Through the adjustment device, the height of the boarding ramp can be adjusted, which makes it convenient to use transport carriages of different heights, reduces the purchase cost, and solves the problem of needing to purchase multiple boarding ramps of different heights to equip transport carriages of different heights, which not only increases the purchase cost but also greatly occupies the transportation space.

[0029] Working principle: Step 1, during adjustment, the mobile base 1 is moved to one end of the transport carriage through the cooperation of the self-locking mobile wheel 2, and after the self-locking mobile wheel 2 is locked and fixed, the hand-tightening bolt 714 is turned counterclockwise to move it outward through the cooperation of the threaded hole 713, until one end of it is out of the interior of the positioning hole 712, at which time the hand-tightening bolt 714 cancels the limit of the telescopic rod 710;

[0030] Step 2: The threaded ring 74 is driven to rotate clockwise by driving the handle 75. The rotation of the threaded ring 74 is positioned and rotated by the cooperation of the annular limiting slide groove 72 and the arc-shaped slide block 73. The screw rod 76 is limited by the second support 77 to extend the screw rod 76, thereby driving one end of the bridge body 4 to adjust the height. While the bridge body 4 is adjusted, the telescopic rod 710 moves on the inner wall of the fixed sleeve 79.

[0031] Step three, after the bridge body 4 is adjusted to a suitable height, turn the hand-tightening bolt 714 clockwise to move one end of the hand-tightening bolt 714 to the inside of one of the positioning holes 712, thereby limiting the telescopic rod 710. The telescopic rod 710 cooperates with the fixed sleeve 79 to support the bridge body 4, thereby reducing the pressure of the screw rod 76, which is beneficial to extending the service life of the screw rod 76. Conversely, when the threaded ring 74 is rotated counterclockwise, the bridge body 4 is driven to move downward for adjustment.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A height-adjustable boarding ramp, comprising a movable base (1), characterized in that: The lower surface of the mobile base (1) is provided with symmetrically distributed self-locking mobile wheels (2), the upper surface of the mobile base (1) is fixedly connected with symmetrically distributed fixed blocks (3), the opposite surfaces of the two fixed blocks (3) are hinged with a bridge body (4) through a pin shaft, one end of the bridge body (4) is hinged with a swing plate (5), and the upper surface of the bridge body (4) is fixedly connected with symmetrically distributed guardrails (6); The upper surface of the mobile base (1) is provided with an adjustment device, and the adjustment device comprises a first support (7), and the lower surface of the first support (7) is fixedly connected to the upper surface of the mobile base (1); The inner wall of the first support (7) is hinged with a storage sleeve (71) through a pin shaft, the upper surface of the storage sleeve (71) is provided with an annular limiting sliding groove (72), and the inner wall of the annular limiting sliding groove (72) is slidably connected with arc-shaped sliding blocks (73) distributed in an annular array; The upper surfaces of the plurality of arc-shaped sliders (73) are all fixedly connected with threaded rings (74), the lower surfaces of the threaded rings (74) are in contact with the upper surface of the storage sleeve (71), and the outer surfaces of the threaded rings (74) are fixedly connected with driving handles (75) distributed in a ring array; The inner wall of the threaded ring (74) is threadedly connected with a screw rod (76), one end of the screw rod (76) extends into the interior of the receiving sleeve (71), and the other end of the screw rod (76) is hingedly connected to a second support (77) via a pin shaft; The upper surface of the second support (77) is fixedly connected to the lower surface of the bridge body (4); the upper surface of the movable base (1) is fixedly connected to a symmetrically distributed third support (78); the inner wall of the third support (78) is hinged with a fixed sleeve (79); The inner wall of the fixed sleeve (79) is movably sleeved with a telescopic rod (710), one end of the telescopic rod (710) is hingedly connected to a fourth support (711) via a pin, and the upper surfaces of the two fourth supports (711) are fixedly connected to the lower surface of the bridge body (4); The outer surface of the telescopic rod (710) is provided with positioning holes (712) distributed in a linear array, and the outer surface of the fixing sleeve (79) is provided with a threaded hole (713). The inner wall of the threaded hole (713) is threadedly connected with a hand bolt (714), and one end of the hand bolt (714) passes through and extends into the interior of one of the positioning holes (712).

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