A multi-stage hydraulic cylinder for semi-trailer dump trucks

Abstract

This utility model provides a multi-stage hydraulic cylinder for a semi-trailer dump truck, comprising: a cylinder, a base, a mounting seat, multiple connecting components, and multiple fixing components; the base is connected to the bottom of the cylinder, and the mounting seat is disposed at the bottom of the base; multiple connecting components are respectively disposed between the base and the mounting seat; multiple fixing components are disposed below the mounting seat, and each fixing component includes a movable groove, a movable block, and a fixing member; the movable groove is formed on the surface of the mounting seat, the movable block is disposed inside the movable groove, and the fixing member is connected to the bottom of the movable block. This utility model provides a multi-stage hydraulic cylinder for a semi-trailer dump truck, in which a connecting bolt, a connecting sleeve, and fixing components are provided between the cylinder with the base and the mounting seat for coordinated operation. After connecting the base and the mounting seat, the connecting bolt can be fixed, thereby achieving double fixing to prevent loosening when used on the dump truck.

Description

Technical Field

[0001] This utility model relates to the field of semi-trailer dump trucks, and in particular to a multi-stage hydraulic cylinder for semi-trailer dump trucks. Background Technology

[0002] A semi-trailer dump truck is a self-dumping transport vehicle based on a semi-trailer structure. It is mainly used for the transportation and self-dumping of bulk goods such as coal, ore, and building materials. It combines the traction characteristics of a semi-trailer with the lifting and unloading function of a dump truck, and features high transportation efficiency and convenient unloading. It is widely used in mining, metallurgy, construction, logistics and other industries.

[0003] Currently, semi-trailer dump trucks use multi-stage hydraulic cylinders for auxiliary operation to facilitate unloading of goods.

[0004] However, the patent application with publication number CN221120532U in the prior art, through the cooperative arrangement between the base, the installation and disassembly mechanism and the multi-stage telescopic hydraulic cylinder body, enables workers to easily disassemble and assemble the multi-stage telescopic hydraulic cylinder body. This effectively avoids the situation where workers need to use screwdrivers and other professional tools for disassembly and assembly due to the use of multiple sets of screws for fixing and installation. It not only makes disassembly and assembly more convenient for workers, but also effectively saves workers' time and energy, making it more convenient for people to use.

[0005] By using the matching arrangement of the limiting plate, limiting hole, fixed cylinder, control rod, movable pad one, movable pad two, spring, limiting block and handle, it is possible to easily fix and install the multi-stage telescopic hydraulic cylinder body. The operator only needs to insert the fixed cylinder into the positioning hole and place the limiting plate at the bottom of the carrier body and align it with the positioning hole. Then, by pressing down the handle until the handle passes through the limiting hole and enters the limiting plate, the operator can rotate the handle to drive the limiting block to rotate until the limiting block is perpendicular to the limiting hole. Through the tension of the spring, the limiting plate is limited, thereby achieving the fixed installation of the multi-stage telescopic hydraulic cylinder body.

[0006] However, when modern hydraulic cylinders are easily installed and disassembled using a quick-release structure, the connection method, which involves rotation and misalignment, can easily lead to loosening when the dump truck experiences bumps during operation.

[0007] Therefore, it is necessary to provide a multi-stage hydraulic cylinder for semi-trailer dump trucks to solve the above-mentioned technical problems. Utility Model Content

[0008] This utility model provides a multi-stage hydraulic cylinder for semi-trailer dump trucks, which solves the problem that when current cylinders are easily installed and disassembled using a quick-release structure for connection, they are prone to loosening when the dump truck experiences bumps during operation due to the rotational misalignment and snap-fit ​​connection method.

[0009] To solve the above-mentioned technical problems, this utility model provides a multi-stage hydraulic cylinder for a semi-trailer dump truck, comprising:

[0010] Hydraulic cylinder, base, mounting bracket, multiple connecting components, and multiple fixing components;

[0011] The base is connected to the bottom of the hydraulic cylinder, and the mounting seat is disposed at the bottom of the base;

[0012] Multiple connecting components are respectively disposed between the base and the mounting base;

[0013] Multiple fixing components are disposed below the mounting base. Each fixing component includes a movable groove, a movable block, and a fixing member. The movable groove is formed on the surface of the mounting base, the movable block is disposed inside the movable groove, and the fixing member is connected to the bottom of the movable block.

[0014] Preferably, the connecting assembly includes a connecting bolt and a connecting sleeve, the connecting bolt being disposed between the base and the mounting seat, and the connecting sleeve being fitted between the connecting bolts.

[0015] Preferably, the connecting bolt and the connecting sleeve are used to fix the base and the mounting seat.

[0016] Preferably, the fastener is used to secure the connecting bolt.

[0017] Preferably, an elastic element is provided inside the movable groove and on one side of the movable block.

[0018] Preferably, the surface of the movable block is connected to a handle.

[0019] Preferably, a disassembly assembly is provided between the mounting base and the base. The disassembly assembly includes a disassembly groove, a disassembly block, and two rubber pads. The disassembly groove is formed on the surface of the mounting base. The disassembly block is disposed inside the disassembly groove and connected to the base. The two rubber pads are respectively adhered to the left and right sides of the inner wall of the disassembly groove.

[0020] Compared with related technologies, the multi-stage hydraulic cylinder for semi-trailer dump trucks provided by this utility model has the following beneficial effects:

[0021] This utility model provides a multi-stage hydraulic cylinder for a semi-trailer dump truck. A connecting bolt, a connecting sleeve, and a fixing component are provided between the cylinder with a base and the mounting seat for coordinated operation. After the base and the mounting seat are connected, the connecting bolt can be fixed, thereby achieving double fixing to prevent loosening when installed on the dump truck. Attached Figure Description

[0022] Figure 1 A schematic diagram of the structure of a first embodiment of a multi-stage hydraulic cylinder for a semi-trailer dump truck provided by this utility model;

[0023] Figure 2 for Figure 1 The enlarged schematic diagram of part A shown below;

[0024] Figure 3 for Figure 1 A three-dimensional structural diagram of a multi-stage hydraulic cylinder is shown.

[0025] Figure 4 for Figure 3 The enlarged schematic diagram of section B is shown below;

[0026] Figure 5 A schematic diagram of the structure of a second embodiment of a multi-stage hydraulic cylinder for a semi-trailer dump truck provided by this utility model;

[0027] Figure 6 for Figure 5 The enlarged schematic diagram of section C is shown.

[0028] The diagram shows: 1. Hydraulic cylinder; 2. Base; 3. Mounting bracket;

[0029] 4. Connecting components; 41. Connecting bolts; 42. Connecting sleeves;

[0030] 5. Fixed component; 51. Movable groove; 52. Movable block; 53. Fixing element; 54. Elastic element;

[0031] 6. Handle;

[0032] 7. Disassembly components; 71. Disassembly groove; 72. Disassembly block; 73. Rubber pad. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0034] First Embodiment

[0035] Please refer to the following: Figure 1 , Figure 2 , Figure 3 and Figure 4 ,in, Figure 1A schematic diagram of the structure of a first embodiment of a multi-stage hydraulic cylinder for a semi-trailer dump truck provided by this utility model; Figure 2 for Figure 1 The enlarged schematic diagram of part A shown below; Figure 3 for Figure 1 A three-dimensional structural diagram of a multi-stage hydraulic cylinder is shown. Figure 4 for Figure 3 The enlarged schematic diagram of section B shown. A multi-stage hydraulic cylinder for a semi-trailer dump truck includes:

[0036] 1. Hydraulic cylinder; 2. Base; 3. Mounting bracket; 4. Multiple connecting components; 5. Multiple fixing components;

[0037] The base 2 is connected to the bottom of the cylinder 1, and the mounting seat 3 is disposed at the bottom of the base 2;

[0038] Multiple connecting components 4 are respectively disposed between the base 2 and the mounting base 3;

[0039] Multiple fixing components 5 are disposed below the mounting base 3. Each fixing component 5 includes a movable groove 51, a movable block 52, and a fixing member 53. The movable groove 51 is formed on the surface of the mounting base 3, the movable block 52 is disposed inside the movable groove 51, and the fixing member 53 is connected to the bottom of the movable block 52.

[0040] The connecting component 4 includes a connecting bolt 41 and a connecting sleeve 42. The connecting bolt 41 is disposed between the base 2 and the mounting base 3, and the connecting sleeve 42 is fitted between the connecting bolts 41.

[0041] The connecting bolt 41 and the connecting sleeve 42 are used to fix the base 2 and the mounting seat 3.

[0042] The fastener 52 is used to fix the connecting bolt 41.

[0043] An elastic element 54 is provided inside the movable groove 51 and on one side of the movable block 52.

[0044] A handle 6 is connected to the surface of the movable block 52.

[0045] The hydraulic cylinder 1 is a multi-stage telescopic structure, containing multiple nested cylinders. It extends or retracts in stages through the input and output of hydraulic oil, and is used to drive the lifting and lowering of the semi-trailer dump truck bed.

[0046] The base 2 is fixed to the bottom of the cylinder 1 and serves as a connecting carrier between the cylinder and the mounting base 3. The surface is provided with a through hole that is compatible with the connecting bolt 41.

[0047] Mounting base and fixing mechanism:

[0048] Mounting base 3 is located below base 2 and is used to fix the oil cylinder to the frame of the semi-trailer dump truck. Its top is provided with a connection hole corresponding to base 2, and its bottom is provided with multiple fixing components 5 (symmetrically distributed along the length of mounting base 3).

[0049] Connection component 4:

[0050] Connecting bolt 41: A connecting hole that passes through the base 2 and the mounting base 3, with external threads at both ends, used to initially fix the base and the mounting base.

[0051] Connecting sleeve 42: It is fitted in the middle of the connecting bolt 41. It is a hollow tubular structure with an outer diameter larger than the diameter of the connecting hole between the base 2 and the mounting seat 3. It serves to position and bear load.

[0052] Fixed component 5:

[0053] Movable slot 51: It is located at the bottom of the mounting base 3 and extends horizontally to accommodate the movable block 52.

[0054] Movable block 52: It is connected to the inner wall of the movable groove 51 through an elastic element 54 (such as a compression spring) and can slide left and right in the groove; a slot is provided at the top to fit the bottom of the connecting bolt 41 and to lock the connecting bolt 41 to prevent it from rotating.

[0055] Fixing element 53: It is a bolt structure that passes through the through hole at the bottom of the movable block 52 and is threaded to the bottom of the mounting base 3 to lock the position of the movable block 52.

[0056] Handle 6: Installed on the surface of movable block 52, facilitating manual pushing and pulling of the movable block.

[0057] Elastic element 54: A cylindrical helical spring is used, with one end fixed to the inner wall of the movable groove 51 and the other end abutting against the movable block 52 to provide a reset elastic force and ensure that the movable block 52 is tightly attached to the connecting bolt 41 when not in operation.

[0058] The working principle of the multi-stage hydraulic cylinder for a semi-trailer dump truck provided by this utility model is as follows:

[0059] Initial fixing: Align the base 2 of the hydraulic cylinder 1 with the mounting base 3, insert the connecting bolt 41 through the connection hole between the base and the mounting base, put on the connecting sleeve 42, and manually tighten the nut until the base and the mounting base are initially in contact.

[0060] Double fixation:

[0061] Pull the handle 6 to overcome the elastic force of the elastic element 54 and slide the movable block 52 to one side so that the slot at the top of the movable block 52 is aligned with the bottom of the connecting bolt 41;

[0062] Release handle 6, elastic element 54 pushes movable block 52 to reset, and the slot locks the flange at the bottom of connecting bolt 41;

[0063] At the same time, the fastener 53 passes through the connecting bolt 41 to limit and fix the connecting sleeve 42, preventing it from loosening due to vehicle bumps.

[0064] Disassembly process:

[0065] Loosen the fastener 53 and pull the handle 6 to disengage the movable block 52 from the connecting bolt 41;

[0066] By removing the connecting bolt 41 and the connecting sleeve 42, the hydraulic cylinder 1 and the mounting base 3 can be separated.

[0067] Work status:

[0068] When the semi-trailer dump truck needs to unload, the hydraulic system injects high-pressure oil into cylinder 1, which pushes the multi-stage cylinders to extend step by step and lift the truck bed.

[0069] After unloading is completed, the hydraulic system is depressurized, and the cylinder 1 retracts under the weight of the cargo box. The movable block 52 and the connecting bolt 41 remain locked to ensure that the cylinder connection is stable during the journey.

[0070] Compared with related technologies, the multi-stage hydraulic cylinder for semi-trailer dump trucks provided by this utility model has the following beneficial effects:

[0071] This utility model provides a multi-stage hydraulic cylinder for a semi-trailer dump truck. A connecting bolt 41, a connecting sleeve 42, and a fixing component 5 are provided between the cylinder 1 with a base 1 and the mounting seat 3. After connecting the base 2 and the mounting seat 3, the connecting bolt 41 can be fixed, thereby achieving double fixing to prevent loosening when installed on the dump truck.

[0072] Second Embodiment

[0073] Please refer to the following: Figure 5 and Figure 6 Based on the first embodiment of this application which provides a multi-stage hydraulic cylinder for a semi-trailer dump truck, the second embodiment of this application proposes another multi-stage hydraulic cylinder for a semi-trailer dump truck. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0074] Specifically, the second embodiment of this application provides a multi-stage hydraulic cylinder for a semi-trailer dump truck, which differs in that a disassembly assembly 7 is provided between the mounting base 3 and the base 2. The disassembly assembly 7 includes a disassembly groove 71, a disassembly block 72, and two rubber pads 73. The disassembly groove 71 is formed on the surface of the mounting base 3, the disassembly block 72 is disposed inside the disassembly groove 71 and connected to the base 2, and the two rubber pads 73 are respectively adhered to the left and right sides of the inner wall of the disassembly groove 71.

[0075] Removal groove 71: It is rectangular and located at the top of the mounting base 3. Its length is adapted to the removal block 72 at the bottom of the base 2, and its depth is slightly greater than the thickness of the removal block 72.

[0076] Disassembly block 72: Fixed to the bottom of base 2, it slides in conjunction with disassembly slot 71, and has inclined chamfers on both sides to facilitate insertion into the disassembly slot.

[0077] Rubber pad 73: Adhesive to the left and right sides of the inner wall of the disassembly groove 71, made of highly elastic rubber material, with anti-slip texture on the surface.

[0078] The disassembly component 7, together with the connecting component 4 and the fixing component 5, forms a triple fixation:

[0079] The engagement between the disassembly block 72 and the disassembly groove 71 restricts the horizontal displacement of the base 2;

[0080] The connecting bolt 41 and the connecting sleeve 42 bear the load in the vertical direction;

[0081] The fixing component 5 prevents the connecting bolt 41 from rotating or loosening.

[0082] The elastic cushioning of rubber pad 73 can reduce fatigue wear of connecting parts caused by vehicle bumps and extend the service life of the hydraulic cylinder.

[0083] The working principle of the multi-stage hydraulic cylinder for a semi-trailer dump truck provided by this utility model is as follows:

[0084] When connecting the base 2 and the mounting base 3, first align the disassembly block 72 with the disassembly slot 71 and insert it, using the chamfer of the disassembly block 72 to guide quick positioning;

[0085] The disassembly block 72 squeezes the rubber pad 73. The rubber pad generates lateral friction through elastic deformation, which initially fixes the base and the mounting seat, and buffers the vibration when the vehicle is running, reducing the stress on the connecting bolt 41.

[0086] Compared with related technologies, the multi-stage hydraulic cylinder for semi-trailer dump trucks provided by this utility model has the following beneficial effects:

[0087] This utility model provides a multi-stage hydraulic cylinder for a semi-trailer dump truck. A disassembly groove 71, a disassembly block 72, and two rubber pads 73 are provided between the base 2 and the mounting seat 3 to facilitate the initial splicing and fixing when fixing the base 2 and the mounting seat 3.

[0088] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A multi-stage hydraulic cylinder for a semi-trailer dump truck, characterized in that, include: Hydraulic cylinder, base, mounting bracket, multiple connecting components, and multiple fixing components; The base is connected to the bottom of the hydraulic cylinder, and the mounting seat is disposed at the bottom of the base; Multiple connecting components are respectively disposed between the base and the mounting base; Multiple fixing components are disposed below the mounting base. Each fixing component includes a movable groove, a movable block, and a fixing member. The movable groove is formed on the surface of the mounting base, the movable block is disposed inside the movable groove, and the fixing member is connected to the bottom of the movable block.

2. The multi-stage hydraulic cylinder for a semi-trailer dump truck according to claim 1, characterized in that, The connecting assembly includes a connecting bolt and a connecting sleeve. The connecting bolt is disposed between the base and the mounting seat, and the connecting sleeve is fitted between the connecting bolts.

3. The multi-stage hydraulic cylinder for a semi-trailer dump truck according to claim 2, characterized in that, The connecting bolt and the connecting sleeve are used to fix the base and the mounting seat.

4. The multi-stage hydraulic cylinder for a semi-trailer dump truck according to claim 2, characterized in that, The fastener is used to secure the connecting bolt.

5. The multi-stage hydraulic cylinder for a semi-trailer dump truck according to claim 1, characterized in that, An elastic element is provided inside the movable groove and on one side of the movable block.

6. The multi-stage hydraulic cylinder for a semi-trailer dump truck according to claim 1, characterized in that, The surface of the movable block is connected to a handle.

7. The multi-stage hydraulic cylinder for a semi-trailer dump truck according to claim 1, characterized in that, A disassembly assembly is provided between the mounting base and the base. The disassembly assembly includes a disassembly groove, a disassembly block, and two rubber pads. The disassembly groove is formed on the surface of the mounting base. The disassembly block is disposed inside the disassembly groove and connected to the base. The two rubber pads are respectively adhered to the left and right sides of the inner wall of the disassembly groove.

Images