A loading platform trailer

Abstract

The present invention relates to the field of trailers and discloses a loading platform trailer, comprising an independent suspension system, a frame, wheels, a lifting device and a telescopic support rod, wherein a sub-frame is located at the bottom of the frame and is movably connected to the frame, and is used to install the suspension system; at least two wheels are fixedly connected to the sub-frame through the suspension system; the lifting device comprises a lifting platform and a driving component, the lifting platform is used for loading and loading, the lifting device is located inside the frame, and the driving component drives the lifting platform to rise and fall inside the frame; and the telescopic support rod is used to lift the trailer off the ground; wherein, through the movement of the sub-frame, the lifting platform can be prevented from interfering with the wheels and the suspension system during the descent process, so that the lifting device can be lowered to the ground, and a detachable or movably connected sub-frame is combined with the lifting device, so that the lifting platform can avoid interfering with the wheels and the suspension system when it is lowered to the ground.

Description

Technical Field

[0001] The present invention relates to the field of trailers, and in particular to a loading platform trailer. Background Art

[0002] In the military field, trailers are a common means of transportation, widely used in the transportation and loading and unloading of materials in warehouses, bases, fields and other places. This type of trailer needs to have high efficiency, speed and high maneuverability to ensure that the mission can be completed quickly in an emergency.

[0003] For example, the Chinese invention patent application number 2015104213641 discloses a low-center-of-gravity trailer with a lifting mechanism, including a front-towed steering wheel set, a rear-towed running wheel set, and a trailer-type cargo pallet. The trailer-type cargo pallet can be lowered to the ground to load items, avoiding the need for large cargo to be disassembled with the help of a crane, thereby improving loading and unloading efficiency. However, the suspension system and wheels are fixed on both sides of the cargo pallet, which has the problem of low strength compared to an independent frame. At the same time, the suspension system takes up a lot of space, resulting in a small effective cargo space of the trailer. Summary of the Invention

[0004] The present invention aims to provide a loading platform trailer to solve the technical problems that the trailer body strength in the prior art is not high and cannot meet the requirements of the field environment, and the suspension system will affect the payload space during loading and unloading.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a loading platform trailer, comprising an independent suspension system, and also comprising: a frame, which is a frame structure; a sub-frame, located at the bottom of the frame and movably connected to the frame, which is used to install the suspension system; at least two wheels, fixedly connected to the sub-frame through the suspension system; a lifting device, comprising a lifting platform and a driving component, the lifting platform is used to load and balance, the lifting device is located inside the frame, and the driving component drives the lifting platform to rise and fall inside the frame; and a telescopic support rod, which is used to lift the trailer off the ground; wherein, through the movement of the sub-frame, it is possible to avoid interference between the lifting platform and the wheels and the suspension system during the descent process, so that the lifting device can be lowered to the ground.

[0006] The beneficial effects of this solution are as follows: the vehicle frame adopts a frame structure to provide sufficient strength and stability. When loading or unloading the load, the entire trailer is first lifted off the ground by the telescopic support rod. At this time, the suspension system installed on the subframe moves away from the bottom position of the frame through the movement of the subframe to leave space for the lifting platform, so that the lifting platform can be lowered to near the ground, which is convenient for loading or removing the load, and the suspension does not occupy the payload space.

[0007] Optionally, a detachably connected reinforcement rod is transversely arranged inside the frame to enhance the rigidity of the frame.

[0008] Optionally, connecting shafts are fixed at both ends of the reinforcing rod, and mounting lugs are fixedly mounted on both sides of the frame. The connecting shafts cooperate with the holes of the mounting lugs to securely connect the connecting rod to the frame. This facilitates disassembly of the reinforcing rod from the frame and provides greater adaptability to loading and distributing of the frame.

[0009] Optionally, the connecting shaft and the connecting rod are directly angled at 90 degrees, which facilitates the disassembly of the connecting rod.

[0010] Optionally, the drive components include a hydraulic cylinder, a sliding rod, a mounting bracket, a connecting belt, and a fixed pulley. The mounting brackets are fixedly mounted on both sides of the vehicle frame, and the sliding rod is slidably clamped to the mounting brackets. One end of the hydraulic rod is on the vehicle frame, and the other end is fixedly connected to the sliding rod. The sliding rod is rotatably connected to at least two sets of fixed pulleys, and each set of fixed pulleys is covered with a connecting belt, one end of which is fixed to the vehicle frame and the other end is fixed to the lifting platform. The design of the drive components of the hydraulic cylinder and the sliding rod enables the lifting device to achieve a large lifting range, thereby improving the loading efficiency of the trailer.

[0011] Optionally, the fixed pulley is a sprocket and the connecting belt is a chain.

[0012] Optionally, there are four groups of telescopic support rods, and one group of telescopic support rods is fixedly installed at the four corners of the frame, and the telescopic support rods are hydraulic lifting rods.

[0013] Optionally, one end of the sub-frame is hinged to the bottom of the frame, so that the sub-frame can be tilted outwards, so that the suspension system leaves the bottom of the frame and leaves space for the lifting device.

[0014] Optionally, the auxiliary frame is detachably fixedly connected to the frame via a locking pin, which has a good fixing effect and is convenient for frequent disassembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 It is a schematic structural diagram of the present invention in the loading and unloading state;

[0017] Figure 3 It is a schematic diagram of the partial structure of the subframe of the present invention;

[0018] Figure 4 It is a schematic diagram of the local structure of the reinforcing rod of the present invention;

[0019] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of area a. DETAILED DESCRIPTION

[0020] The following is further described in detail through specific implementation methods:

[0021] The reference numerals in the drawings of the specification include: frame 1, subframe 2, locking pin 21, suspension system 3, wheel 4, lifting platform 51, driving component 52, hydraulic cylinder 521, sliding rod 522, mounting bracket 523, connecting belt 524, fixed pulley 525, telescopic support rod 6, reinforcing rod 7, connecting shaft 71, and mounting lug 72.

[0022] Example 1

[0023] Example 1 is basically as shown in the attached Figure 1-5 As shown, Figure 2 The loading platform trailer shown includes a frame 1 , a subframe 2 , a suspension system 3 , a lifting device and a reinforcing rod 7 .

[0024] The frame 1 adopts a frame structure design. It should be noted that the frame structure is composed of multiple continuous frames, each frame is connected by connecting parts to form an integral structure. Optionally, the frame 1 can be formed by welding rectangular profiles, using a three-layer structure to enhance rigidity, and the connecting parts are welded.

[0025] A detachable reinforcement rod 7 (such as Figure 4 and Figure 5 , serves to enhance the rigidity of the vehicle frame 1. Connecting shafts 71 are fixed to each end of the reinforcing rod 7, and mounting lugs 72 are fixedly mounted on both sides of the vehicle frame 1. The connecting shafts 71 mate with the holes in the mounting lugs 72, securing the reinforcing rod 7 to the vehicle frame 1. The connecting shaft 71 forms a 90-degree angle with the reinforcing rod 7, facilitating its removal. Optionally, a bolt can be threaded onto the mounting lugs 72. After passing through the mounting lugs 72, the bolt contacts the connecting shaft 71, which then presses against the connecting shaft 71, securing it in place.

[0026] like Figure 3 As shown, subframe 2 is located at the bottom of frame 1 and is movably connected to frame 1. Optionally, subframe 2 can be welded from rectangular profiles. One end of subframe 2 is hinged to the bottom of frame 1, and the other end is removably fixed to frame 1 via a locking pin 21. The locking pin 21 serves to secure subframe 2 to frame 1. Other removable connection methods are also possible, such as threaded connections, latches, springs, buckles, slots, and magnetic connections (removable connection achieved by switching the magnet on and off). Subframe 2 is used to mount suspension system 3.

[0027] Wheels 4 are mounted on the bottom of the subframe 2 via a suspension system 3. To maintain trailer stability, this embodiment includes at least two wheels 4. Optionally, the suspension system 3 can employ air suspension. To provide even greater support, a hydraulic suspension system can be added to the air suspension to provide greater load-bearing capacity and stability. The suspension system 3 supports the trailer and maintains contact between the wheels 4 and the ground.

[0028] The lifting device includes a lifting platform 51 and a driving component 52. The lifting platform 51 is used for loading and stowing. The lifting device is located inside the vehicle frame 1, and the driving component 52 drives the lifting platform 51 to rise and fall within the vehicle frame 1. The driving component 52 includes a hydraulic cylinder 521, a sliding rod 522, a mounting bracket 523, a connecting belt 524, and a fixed pulley 525. The mounting bracket 523 is fixedly mounted on both sides of the vehicle frame 1, the sliding rod 522 is slidably clamped on the mounting bracket 523, the hydraulic cylinder 521 is fixed to the vehicle frame 1, and the output shaft of the hydraulic cylinder 521 is fixedly connected to the sliding rod 522. Each set of mounting brackets 523 is rotatably connected to at least two sets of fixed pulleys 525, and each set of fixed pulleys 525 is sleeved with a connecting belt 524, one end of the connecting belt 524 is fixed to the vehicle frame 1, and the other end is fixed to the lifting platform 51. The fixed pulley 525 is a sprocket, and the connecting belt 524 is a chain. The driving component 52 of this embodiment is equivalent to a labor-intensive lever, which saves movement distance. In this way, the mounting bracket 523 does not need to be designed too high, so that the lifting platform 51 can have a larger lifting range. The design of the driving component 52 of the hydraulic cylinder 521 and the sliding rod 522 enables the lifting device to achieve a larger lifting range, thereby improving the loading efficiency of the trailer.

[0029] Telescopic support rods 6 are used to lift the trailer off the ground. There are four sets of telescopic support rods 6, one fixed to each of the four corners of the frame 1. These hydraulic lift rods 6 are used to lift the trailer. When all four sets of telescopic support rods 6 are lifted, the wheels 4 are off the ground, making it easier to adjust the suspension system 3 and the position of the wheels 4.

[0030] By moving the subframe 2, the lifting platform 51 is prevented from interfering with the wheels 4 and suspension system 3 during descent, allowing the lifting device to be lowered to the ground. The loading platform trailer of the present invention has an innovative structure, is easy to use, and has a large lifting range, which can meet the needs of use in different working conditions.

[0031] Example 2

[0032] Based on the first embodiment, the driving component 52 is adjusted.

[0033] like Figure 2As shown, the driving component 52 of the embodiment is equivalent to a lever that requires less effort, saving travel distance. This allows the mounting bracket 523 to be designed without being too high, and the lifting platform 51 to have a larger lifting range. Optionally, the driving component 52 can also be a worm gear pair, a hydraulic system, a pneumatic system, an electric motor, etc. Specifically, it can be manually operated: in a field environment, the power supply may be unstable or non-existent, so it is necessary to consider manually operating the driving component 52. For example, a hand wheel or a handle can reduce the degree of dependence on electricity and improve the reliability of the lifting platform 51. Hydraulic drive: The hydraulic system can provide large lifting force and stability, and is suitable for situations where large loads need to be carried in a field environment. In addition, the hydraulic system can also enhance safety by providing a pressure protection device. Pneumatic drive: The pneumatic system can provide a fast lifting speed, and is suitable for situations where the height needs to be adjusted quickly in a field environment. In addition, the pneumatic system has high safety, is not prone to leakage, and has a small impact on the environment. Multiple drive modes: There can be multiple drive modes, such as a combination of hydraulic and pneumatic, or a combination of manual and hydraulic, etc., to cope with different field environments and application scenarios, and improve the flexibility and reliability of the lifting platform 51.

[0034] Example 3

[0035] Based on Example 1, the connection method between the subframe 2 and the frame 1 can be adjusted. For example, the subframe 2 can be connected to the frame 1 using a sliding connection. Compared with the rotational connection of Example 1, the sliding connection of the subframe 2 has better rigidity and stability. The rotational connection method of Example 1 will cause stress concentration at the rotating shaft, affecting the service life. To overcome this difficulty, it is necessary to use materials with better mechanical properties, which increases manufacturing costs. The sliding connection method has greater advantages in strength and stability, allowing the trailer to better meet the stability requirements of the trailer equipment under the harsh working conditions of the field combat environment. It should be noted that the sliding connection is a common mechanical connection method, and the connection and separation can be achieved through the relative movement of the sliding pair and the reference pair.

[0036] For example, it can be: Hydraulic connection structure: The hydraulic connection structure uses a hydraulic cylinder to achieve sliding between the main frame 1 and the sub-frame 2. Slide plate connection structure: This structure uses a slide plate between the sub-frame 2 and the main frame 1, and achieves sliding through the friction between the slide plate and the guide rail. The slide plate connection structure has a high load-bearing capacity and rigidity. Ball connection structure: The ball connection structure uses a ball head to connect with the ball seat, which can achieve movement along multiple axis directions. This structure can meet the multi-dimensional movement of the sub-frame 2 on the main frame 1. Roller connection structure: The roller connection structure uses rollers to connect with the guide rail, which can achieve high-speed sliding and the transfer of large loads.

[0037] Specifically, in the connection between the sub-frame 2 and the frame 1, a slide groove and slider structure can be used to achieve a sliding connection. Specifically, a slider and a slide groove can be installed at the bottom of the sub-frame 2 and the top of the frame 1 respectively. The slider can be embedded in the slide groove to achieve a sliding connection between the two components. It can also be: in the connection between the sub-frame 2 and the frame 1, a linear guide rail can be used to achieve a sliding connection. Specifically, a pair of linear guide rails and guide rail seats can be installed at the bottom of the sub-frame 2 and the top of the frame 1 respectively. The guide rail seat can slide along the guide rail to achieve a sliding connection between the two components. The above embodiments are only used to illustrate the present invention and do not impose any limitations on the technical solution of the present invention. Without departing from the spirit and principles of the present invention, the various technical features of the present invention can be arbitrarily combined to meet the needs of different application scenarios.

[0038] The commonly known specific technical solutions and / or features of the solution are not described in detail here. It should be noted that for those skilled in the art, several variations and improvements can be made without departing from the technical solution of the present invention, and these should also be considered as the scope of protection of the present invention. These will not affect the effectiveness of the implementation of the present invention and the practicality of the patent. The scope of protection claimed by this application shall be based on the content of its claims, and the specific implementation methods and other records in the description can be used to interpret the content of the claims.

Claims

1. A loading platform trailer, comprising an independent suspension system, characterized in that: Also includes: A vehicle frame, wherein the vehicle frame is a frame structure; The subframe is located at the bottom of the frame and is movably connected to the frame, and is used to install the suspension system; at least two wheels fixedly connected to the subframe via the suspension system; A lifting device, comprising a lifting platform and a driving component, wherein the lifting platform is used for loading and stowing, the lifting device is located inside the vehicle frame, and the driving component drives the lifting platform to rise and fall inside the vehicle frame; as well as Telescopic support bar, used to lift the trailer off the ground; The cam is fixed to the chassis and the chassis is supported by the support member, and the support member is supported by the support member. The support member is connected to the chassis by the support member, and the support member is supported by the support member. The support member is connected to the chassis by the support member, and the support member is supported by the support member.

2. The loading platform trailer according to claim 1, characterized in that: The fixed pulley is a sprocket, and the connecting belt is a chain.

3. The loading platform trailer according to claim 1, characterized in that: It also includes a locking pin, and the sub-frame is detachably fixedly connected to the frame via the locking pin.

4. The loading platform trailer according to claim 1, characterized in that: A detachably connected reinforcement rod is transversely arranged inside the vehicle frame.

5. The loading platform trailer according to claim 4, characterized in that: It also includes mounting ears and connecting shafts, the connecting shafts are fixedly mounted on both ends of the reinforcing rod, and the mounting ears are fixedly mounted on both sides of the frame. The reinforcing rod is fixedly connected to the frame by inserting the connecting shafts at both ends of the reinforcing rod into the mounting ears on both sides of the frame.

6. The loading platform trailer according to claim 5, characterized in that: The included angle between the connecting shaft and the connecting rod is 90 degrees.

7. The loading platform trailer according to claim 1, characterized in that: There are four groups of telescopic support rods, and one group of telescopic support rods is fixedly installed at each of the four corners of the frame.

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