Hydraulic ladder stand convenient to adjust for semitrailer

Abstract

The utility model relates to the technical field of semitrailers, and discloses a hydraulic ladder stand convenient to adjust for a semitrailer, which comprises a connecting shell and a fixed shell, the inner wall of the connecting shell is rotatably connected with a rotating column, the left and right sides of the outer wall of the rotating column are fixedly connected with hydraulic ladder stand equipment, and the left and right ends of the rear side of the connecting shell are fixedly connected with clamping plates. And threaded grooves are formed in the inner walls of the clamping plates, clamping grooves are formed in the left end and the right end of the front side of the fixing shell correspondingly, the bottoms of the two clamping plates are clamped with the corresponding clamping grooves correspondingly, threaded rods are in threaded connection with the left side and the right side of the fixing shell correspondingly, and a rotating disc is fixedly connected to one end of each threaded rod. According to the hydraulic ladder stand, by rotating the rotating disc, the threaded rod rotates and displaces to enter the threaded groove in the clamping plate, so that the hydraulic ladder stand equipment is installed, otherwise, the hydraulic ladder stand equipment can be disassembled, the situation that the hydraulic ladder stand is inconvenient to disassemble and overhaul is avoided, and the overhaul efficiency of the ladder stand is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of semi-trailers, in particular to a hydraulic ladder for semi-trailers that is convenient to adjust. Background Art

[0002] A semi-trailer is a common freight vehicle, consisting of a tractor and a connected semi-trailer vehicle. This design enables the tractor to bear part of the load during driving, while the semi-trailer is responsible for the main cargo transportation. It is widely used in the cargo transportation and logistics industries and can adapt to long-distance transportation and various road conditions.

[0003] When using a semi-trailer to transport goods, the semi-trailer is assisted in loading and unloading by a hydraulic ladder. The hydraulic ladder can provide a more convenient and safe way to get on and off the vehicle, especially during loading and unloading of goods. This hydraulic ladder is installed at the rear or side of the semi-trailer, and the use of the hydraulic ladder on the semi-trailer can improve the loading and unloading efficiency.

[0004] In the existing hydraulic type, hydraulic oil is pumped from the fuel tank to the hydraulic cylinder by a hydraulic pump. The hydraulic cylinder is a piston-type device. The hydraulic oil pushes the piston to move under the pressure in the working chamber, thereby realizing the lifting and lowering of the ladder. During the daily maintenance of the ladder, since the hydraulic ladder is fixedly installed on the semi-trailer, a large amount of labor cost is consumed during disassembly, the time required for disassembly is increased, and it is thus not convenient to disassemble and repair the hydraulic ladder, reducing the maintenance efficiency of the ladder. Therefore, a hydraulic ladder for semi-trailers that is convenient to adjust is proposed to solve the above problems. Summary of the Utility Model

[0005] To make up for the above deficiencies, the utility model provides a hydraulic ladder for semi-trailers that is convenient to adjust, aiming to improve the problem that a large amount of labor cost is consumed during disassembly, the time required for disassembly is increased, and it is thus not convenient to disassemble and repair the hydraulic ladder, thereby reducing the maintenance efficiency of the ladder.

[0006] To achieve the above object, the utility model adopts the following technical scheme: A hydraulic ladder for semi-trailers that is convenient to adjust, including a connection shell and a fixed shell. A rotating column is rotatably connected to the inner wall of the connection shell. Hydraulic ladder devices are fixedly connected to both the left and right sides of the outer wall of the rotating column. Clamping plates are fixedly connected to both the left and right ends at the rear of the connection shell. Thread grooves are provided in the inner walls of the clamping plates. Clamping grooves are provided at both the left and right ends on the front side of the fixed shell. The bottoms of the two clamping plates are respectively clamped with the corresponding clamping grooves. Threaded rods are threadedly connected to both the left and right sides of the fixed shell. A turntable is fixedly connected to one end of each threaded rod. The adjacent ends of the two threaded rods are respectively threadedly connected to the corresponding thread grooves. Locking mechanisms are provided on both the left and right sides of the top wall of the connection shell. The locking mechanisms are used to improve the stability of the hydraulic ladder devices.

[0007] As a further description of the above technical solution:

[0008] The locking mechanism includes two vertical plates. The bottom walls of the two vertical plates are respectively fixedly connected to the left and right sides of the top wall of the connection shell. The bottom of the front side of the vertical plate is fixedly connected with a rotating plate. One side of the rotating plate is rotatably connected with a rotating rod shell. A convex groove is provided inside the rotating rod shell. The top of the front side of the vertical plate is fixedly connected with a locking plate. A threaded locking column is threadedly connected inside the locking plate. The rear side of the hydraulic ladder equipment is fixedly connected with a locking plate. The middle of the threaded locking column is threadedly connected with the inner wall of the convex groove.

[0009] As a further description of the above technical solution:

[0010] A control switch is fixedly connected to the right side of the connection shell. The control switch is electrically connected to the hydraulic ladder equipment.

[0011] As a further description of the above technical solution:

[0012] A protective shell is arranged on the right side of the control switch. The left side of the protective shell is rotatably connected to the right side of the connection shell through a hinge.

[0013] As a further description of the above technical solution:

[0014] Rubber sleeves are fixedly connected to the opposite sides of the two turntables. The outer shapes of the two rubber sleeves are both designed as cylinders.

[0015] As a further description of the above technical solution:

[0016] Rubber pads are fixedly connected to the adjacent sides of the two turntables. One sides of the two rubber pads are respectively in contact with the corresponding sides of the fixed shell.

[0017] As a further description of the above technical solution:

[0018] Arc-shaped pads are fixedly connected to the opposite sides of the two locking plates and the two locking plates. Arc surfaces are arranged on the inner walls of the multiple arc-shaped pads.

[0019] As a further description of the above technical solution:

[0020] A plurality of grooves are provided on the front sides of the two hydraulic ladder equipments. The two hydraulic ladder equipments are both designed symmetrically.

[0021] The utility model has the following beneficial effects:

[0022] In the present utility model, by engaging two engaging plates with corresponding engaging grooves, the hydraulic ladder equipment can be preliminarily fixed to the fixed shell. The fixed shell is fixedly connected to the semi-trailer. Then, by rotating the turntable, the threaded rod rotates and displaces into the threaded groove inside the engaging plate, thus completing the installation of the hydraulic ladder equipment. Conversely, it can be disassembled, avoiding the situation where it is inconvenient to disassemble and repair the hydraulic ladder, thereby improving the repair efficiency of the ladder.

[0023] In the present utility model, by rotating the rod shell, the threaded locking column slides upward in the convex groove and then engages and rotates with the locking plate, so that when the hydraulic ladder equipment rotates to a fixed angle, it can be locked and fixed, thereby improving the stability during the use of the hydraulic ladder equipment and avoiding the increase in danger when handling materials due to the shaking of the hydraulic ladder equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a perspective view of a hydraulically adjustable ladder for a semi-trailer proposed by the present utility model;

[0025] Figure 2 is a schematic structural view of the engaging plate of a hydraulically adjustable ladder for a semi-trailer proposed by the present utility model;

[0026] Figure 3 is an exploded view of the locking mechanism of a hydraulically adjustable ladder for a semi-trailer proposed by the present utility model.

[0027] LEGEND DESCRIPTION:

[0028] 1. Fixed shell; 2. Locking mechanism; 201. Vertical plate; 202. Rotating plate; 203. Rotating rod shell; 204. Convex groove; 205. Locking plate; 206. Threaded locking column; 207. Locking plate; 208. Arc-shaped pad; 3. Rotating column; 4. Hydraulic ladder equipment; 5. Engaging plate; 6. Threaded groove; 7. Fixed shell; 8. Engaging groove; 9. Threaded rod; 10. Turntable; 11. Rubber sleeve; 12. Rubber pad; 13. Control switch; 14. Protective shell. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] Refer to Figure 1 and Figure 2, An embodiment provided by the present utility model: A hydraulically operated ladder for semi-trailers that is easy to adjust, including a connecting shell 1 and a fixed shell 7. A rotating column 3 is rotatably connected to the inner wall of the connecting shell 1. Hydraulic ladder devices 4 are fixedly connected to both the left and right sides of the outer wall of the rotating column 3. Clamping plates 5 are fixedly connected to both the left and right ends at the rear side of the connecting shell 1. Thread grooves 6 are provided in the inner walls of the clamping plates 5. Clamping grooves 8 are provided at both the left and right ends on the front side of the fixed shell 7. The bottoms of the two clamping plates 5 are respectively clamped with the corresponding clamping grooves 8. Threaded rods 9 are threadedly connected to both the left and right sides of the fixed shell 7. A turntable 10 is fixedly connected to one end of the threaded rod 9. The adjacent ends of the two threaded rods 9 are respectively threadedly connected to the corresponding thread grooves 6;

[0031] Specifically, rotating the turntable 10 can drive the corresponding threaded rods 9 to move synchronously in the direction away from each other. The threaded rods 9 will gradually withdraw from the thread grooves 6 inside the clamping plates 5, releasing the locking with the clamping plates 5. Lift the connecting shell 1 upward to separate it from the fixed shell 7 fixed to the rear side of the semi-trailer, thereby facilitating in-depth inspection and maintenance of the hydraulic ladder device 4, thus improving the inspection and repair efficiency of the ladder.

[0032] Refer to Figure 1 and Figure 3 , Locking mechanisms 2 are provided on both the left and right sides of the top wall of the connecting shell 1. The locking mechanisms 2 are used to improve the stability of the hydraulic ladder device 4. The locking mechanisms 2 include two vertical plates 201. The bottom walls of the two vertical plates 201 are respectively fixedly connected to both the left and right sides of the top wall of the connecting shell 1. A rotating plate 202 is fixedly connected to the bottom of the front side of the vertical plate 201. A rotating rod shell 203 is rotatably connected to one side of the rotating plate 202. A convex groove 204 is provided inside the rotating rod shell 203. A locking plate 205 is fixedly connected to the top of the front side of the vertical plate 201. A threaded locking column 206 is threadedly connected to the inside of the locking plate 205. A locking plate 207 is fixedly connected to the rear side of the hydraulic ladder device 4. The middle part of the threaded locking column 206 is threadedly connected to the inner wall of the convex groove 204;

[0033] Specifically, rotate the rotating rod shell 203 while sliding the threaded locking column 206 to slide inside the convex groove 204. As the threaded locking column 206 slides upward, it is clamped and threadedly connected to the locking plate 207 fixed to the rear side of the hydraulic ladder device 4, forming a stable locking point. Prevent the device from tilting due to accidental shaking or gravity, thus significantly improving the stability of the operation. When it is necessary to release the lock and make a larger-angle rotation, just operate in the reverse direction, and the threaded locking column 206 will disengage from the locking plate 207.

[0034] Refer to Figure 1 、 Figure 2 and Figure 3, a control switch 13 is fixedly connected to the right side of the connecting shell 1, and the control switch 13 is electrically connected to the hydraulic ladder device 4; a protective shell 14 is provided on the right side of the control switch 13, and the left side of the protective shell 14 is rotatably connected to the right side of the connecting shell 1 through a hinge; a plurality of grooves are provided on the front sides of the two hydraulic ladder devices 4, and the two hydraulic ladder devices 4 are symmetrically designed;

[0035] Specifically, through the control switch 13 electrically connected to the hydraulic ladder device 4, the device can be turned on or off, and the control switch 13 can be protected by the protective shell 14. A plurality of grooves are provided on the front sides of the two hydraulic ladder devices 4 to improve the toughness of the front sides of the hydraulic ladder devices 4. The model of the control switch 13 used in the utility model is the servo motor SG90.

[0036] Reference Figure 3 The two rotating disks 10 are fixedly connected to the sides away from each other with rubber sleeves 11, and the shapes of the two rubber sleeves 11 are both cylindrical; the adjacent sides of the two rotating disks 10 are fixedly connected to rubber pads 12, and one side of the two rubber pads 12 is respectively in contact with one side of the corresponding fixed shell 7; the two locking plates 207 and the two locking plates 205 are fixedly connected to the sides away from each other with arc pads 208, and the inner walls of the multiple arc pads 208 are all provided with arc surfaces;

[0037] Specifically, the rubber sleeve 11 improves the anti-skid effect of the turntable 10 , the rubber pad 12 reduces the rotation damage of the turntable 10 to the fixed shell 7 , and the arc pad 208 increases the service life of the locking plate 207 and the locking plate 205 .

[0038] Working principle: When disassembling begins, the connecting shell 7 is fixedly connected to the semi-trailer. By rotating the turntable 10, the two threaded rods 9 are displaced and rotated in the direction away from each other, and then separated from the threaded groove 6 inside the clamping plate 5 and unlocked, so that the connecting shell 1 is raised upward, the two clamping plates 5 are separated from the clamping groove 8, and then the connecting shell 1 and the two hydraulic ladder devices 4 are disassembled, so as to achieve the purpose of facilitating disassembly and maintenance. Otherwise, the installation is completed, avoiding the situation where it is inconvenient to disassemble and repair the hydraulic ladder;

[0039] And through the tilting and rotation of the hydraulic ladder device 4, the rotating rod shell 203 is rotated together, and the threaded locking column 206 slides upward in the convex groove 204, and then engages with the locking plate 207 fixed on the rear side of the hydraulic ladder device 4 for threaded connection, so that the hydraulic ladder device 4 is locked when it is rotated to a fixed angle, thereby improving the stability. Conversely, the lock is released and the hydraulic ladder device 4 can complete a larger angle of rotation.

[0040] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A hydraulic ladder for a semitrailer that is easy to adjust, comprising a connecting shell (1) and a fixed shell (7), characterized in that: The inner wall of the connecting shell (1) is rotatably connected to a rotating column (3), and the left and right sides of the outer wall of the rotating column (3) are fixedly connected to the hydraulic ladder climbing device (4). The left and right ends of the rear side of the connecting shell (1) are fixedly connected to the clamping plates (5), and the inner wall of the clamping plates (5) is provided with a threaded groove (6). The left and right ends of the front side of the fixed shell (7) are provided with a clamping groove (8), and the bottoms of the two clamping plates (5) are respectively engaged with the corresponding clamping grooves (8). The left and right sides of the fixed shell (7) are threadedly connected to threaded rods (9), and one end of the threaded rod (9) is fixedly connected to a rotating disk (10). The adjacent ends of the two threaded rods (9) are respectively threadedly connected to the corresponding threaded grooves (6). The left and right sides of the top wall of the connecting shell (1) are provided with locking mechanisms (2), and the locking mechanisms (2) are used to improve the stability of the hydraulic ladder climbing device (4).

2. The easily adjustable hydraulic ladder for a semitrailer according to claim 1, characterized in that: The locking mechanism (2) comprises two vertical plates (201), the bottom walls of the two vertical plates (201) are respectively fixedly connected to the left and right sides of the top wall of the connecting shell (1), the front bottom of the vertical plate (201) is fixedly connected to a rotating plate (202), one side of the rotating plate (202) is rotatably connected to a rotating rod shell (203), a convex groove (204) is provided inside the rotating rod shell (203), a locking plate (205) is fixedly connected to the front top of the vertical plate (201), a threaded locking column (206) is threadedly connected inside the locking plate (205), a locking plate (207) is fixedly connected to the rear side of the hydraulic ladder device (4), and the middle part of the threaded locking column (206) is threadedly connected to the inner wall of the convex groove (204).

3. The adjustable hydraulic ladder for a semitrailer according to claim 1, characterized in that: A control switch (13) is fixedly connected to the right side of the connection shell (1), and the control switch (13) is electrically connected to the hydraulic ladder device (4).

4. The easily adjustable hydraulic ladder for a semitrailer according to claim 3, characterized in that: A protective shell (14) is provided on the right side of the control switch (13), and the left side of the protective shell (14) is rotatably connected to the right side of the connecting shell (1) via a hinge.

5. The easily adjustable hydraulic ladder for a semi-trailer according to claim 1, characterized in that: A rubber sleeve (11) is fixedly connected to the two rotating disks (10) at one side away from each other, and the two rubber sleeves (11) are both cylindrical in shape.

6. The easily adjustable hydraulic ladder for a semitrailer according to claim 1, characterized in that: Adjacent sides of the two rotating disks (10) are fixedly connected with rubber pads (12), and one side of the two rubber pads (12) is in contact with one side of the corresponding fixed shell (7).

7. The adjustable hydraulic ladder for a semitrailer according to claim 2, characterized in that: The two locking plates (207) and the two locking plates (205) are fixedly connected with arc-shaped pads (208) on their sides away from each other, and the inner walls of the plurality of arc-shaped pads (208) are all provided with arc surfaces.

8. The easily adjustable hydraulic ladder for a semitrailer according to claim 1, characterized in that: The front sides of the two hydraulic ladder devices (4) are each provided with a plurality of grooves, and the two hydraulic ladder devices (4) are both symmetrically designed.

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