Supporting connection structure for a semi-trailer

Abstract

This disclosure relates to the technical field of semi-trailer related accessories. One embodiment of this disclosure provides a support connection structure for a semi-trailer, comprising: a main frame and a pair of connecting seats, both of which are disposed on the main frame; a connecting component disposed on the connecting seats; and a retraction component disposed between the connecting seats and the main frame. The connecting component includes a pair of slots, both of which are located at the bottom of the connecting seats. Positioning holes are provided on both sides of the connecting seats, and threaded holes are provided inside the side surface of the connecting seats. A pair of connecting holes are provided on the side surface of the connecting seats, and connecting holes are located on both sides of the threaded holes. Connecting rods are movably fitted into each connecting hole. This technical solution solves the technical problem in the prior art where the unfolding and retraction process relies on manually turning a crank to drive a lead screw for lifting, which is cumbersome and time-consuming.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the technical field of semi-trailer related accessories, specifically to a support connection structure for a semi-trailer. Background Technology

[0002] In semi-trailer transportation and loading / unloading operations, the support legs are key components to ensure vehicle stability. Their main function is to support the ground and bear part of the vehicle's weight after the trailer is separated from the tractor or during loading and unloading, thus preventing the vehicle from tilting or sinking.

[0003] Currently, most semi-trailer outrigger connection structures on the market adopt a split, manually operated design. Their deployment and retraction require manual operation by turning a crank to drive a lead screw, making the process cumbersome and time-consuming. Especially in scenarios with frequent loading and unloading of goods, operators must repeatedly bend over or squat, resulting in high labor intensity and low operational efficiency.

[0004] Furthermore, traditional support legs are often fixed to the frame using a single pin or bolt. Over time, vibration can create gaps, causing the support legs to wobble and affecting stability. Additionally, some designs lack guide and limit mechanisms, leading to inconsistent heights on both sides of the support legs during deployment, requiring secondary adjustments and further extending operation time.

[0005] These drawbacks make it difficult for semi-trailers to meet the needs of rapid loading and unloading operations in scenarios with high timeliness requirements, such as short-distance delivery and port turnover. There is an urgent need for a new type of support connection structure that can enable the support legs to be quickly extended and retracted and that provides a stable connection. Utility Model Content

[0006] To overcome the above-mentioned defects, the embodiments of this disclosure provide a support connection structure for semi-trailers, which solves the technical problem that the unfolding and retraction process of the prior art requires manual rotation of the crank to drive the lead screw to lift, which is cumbersome and time-consuming.

[0007] According to one aspect, at least one embodiment of this disclosure provides a support connection structure for a semi-trailer, comprising: The main frame and a pair of connecting seats, both of which are mounted on the main frame; A connecting component, wherein the connecting component is disposed on the connecting base; A retractable assembly is disposed between the connecting seat and the main frame; The connecting assembly includes a pair of slots, both of which are located at the bottom of the connecting seat. Positioning holes are provided on both sides of the connecting seat. Threaded holes are provided inside the side surface of the connecting seat. A pair of connecting holes are provided on the side surface of the connecting seat, located on both sides of the threaded holes. Connecting rods are movably fitted into each connecting hole.

[0008] As a further technical solution, a fixing plate is fixedly connected to one end of the connecting rod, and a stud is rotatably fitted onto the inner surface of the fixing plate. One end of the stud is connected to the threaded hole through a threaded engagement.

[0009] As a further technical solution, a positioning post is provided on the side surface of the fixing plate, the positioning post and the positioning hole are located on the same axis, a pair of stabilizing holes are provided on the side surface of the connecting seat, and a pair of reinforcing rods are provided on the side surface of the fixing plate, the reinforcing rods are positioned corresponding to the stabilizing holes.

[0010] As a further technical solution, the retracting assembly includes a pair of bearing seats, which are fixed at both ends of the bottom surface of the main frame. A shaft is rotatably connected inside the bearing seat, and both ends of the shaft are fixedly connected to the side end face of the connecting seat.

[0011] As a further technical solution, a connecting frame is provided on the shaft, and a rotating block is rotatably connected to the lower end of the connecting frame via a pin. A hydraulic telescopic cylinder is rotatably connected to the bottom of the main frame via a pin, and the output end of the hydraulic telescopic cylinder is fixedly connected to the rotating block.

[0012] As a further technical solution, the shaft can rotate 90° around the bearing seat.

[0013] As a further technical solution, the main frame has an overall C-shaped structure, and several fixing holes are provided at both ends of the main frame.

[0014] As a further technical solution, a pair of limiting rings are provided at both ends of the shaft, and the limiting rings are respectively located on both sides of the shaft seat.

[0015] The beneficial effects of the embodiments disclosed herein are as follows: In this disclosure, the retraction and extension assembly solves the problem of cumbersome retraction and extension of the support structure through a hydraulic drive design. A hydraulic telescopic cylinder drives the shaft and connecting seat to rotate, precisely switching between support and retraction states with a 90° rotation, while a limit ring ensures shaft stability. This structure replaces the manual crank, significantly shortening operation time, reducing labor intensity, and adapting to frequent loading and unloading scenarios. Simultaneously, the ample hydraulic drive power ensures smooth retraction and extension, improving the efficiency and safety of semi-trailer operations. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of a structure in one embodiment of the present disclosure; Figure 2 This is an isometric drawing of the present disclosure; Figure 3 This is an isometric sectional view of the present disclosure; In the diagram: 1. Main frame; 2. Connecting seat; 3. Connecting assembly; 3-1. Slot; 3-2. Positioning hole; 3-3. Threaded hole; 3-4. Connecting hole; 3-5. Connecting rod; 3-6. Fixing plate; 3-7. Stud; 3-8. Positioning post; 3-9. Stabilizing hole; 3-10. Reinforcing rod; 4. Retraction assembly; 4-1. Shaft seat; 4-2. Shaft; 4-3. Connecting frame; 4-4. Rotating block; 4-5. Hydraulic telescopic cylinder; 5. Fixing hole; 6. Limit ring. Detailed Implementation

[0018] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0019] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0020] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0021] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0023] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] like Figures 1-3 As shown, it illustrates a support connection structure for a semi-trailer according to an embodiment of the present disclosure, comprising: The main frame 1 and a pair of connecting seats 2 are both disposed on the main frame 1; Connection component 3 is disposed on the connection base 2; A retractable assembly 4 is disposed between the connecting seat 2 and the main frame 1; The connecting assembly 3 includes a pair of slots 3-1, each slot 3-1 being formed at the bottom of the connecting seat 2. Positioning holes 3-2 are formed on both sides of the connecting seat 2. A threaded hole 3-3 is formed inside the side surface of the connecting seat 2. A pair of connecting holes 3-4 are formed on both sides of the threaded hole 3-3. A connecting rod 3-5 is movably fitted into each connecting hole 3-4. One end of each connecting rod 3-5 is fixedly connected to a fixing plate 3-6. A stud 3-7 is rotatably fitted onto the inner surface of the fixed plate 3-6. One end of the stud 3-7 is threaded into the threaded hole 3-3. A positioning post 3-8 is provided on the side surface of the fixed plate 3-6. The positioning post 3-8 and the positioning hole 3-2 are located on the same axis. A pair of stabilizing holes 3-9 are provided on the side surface of the connecting seat 2. A pair of reinforcing rods 3-10 are provided on the side surface of the fixed plate 3-6. The reinforcing rods 3-10 are positioned corresponding to the stabilizing holes 3-9.

[0025] In some examples, a connecting component 3 is designed to achieve quick and secure docking between the support leg and the connecting seat 2. This component includes a slot 3-1 at the bottom of the connecting seat 2, which mates with the insert at the top of the support leg, providing a slot 3-1 connection for the support leg. The positioning holes 3-2 on both sides of the connecting seat 2 correspond to the slots on the sides of the support leg, ensuring accurate docking direction. The threaded hole 3-3 on the side surface of the connecting seat 2 engages with the stud 3-7, and the connecting hole 3-4 provides a moving channel for the connecting rod 3-5. One end of the connecting rod 3-5 is welded and fixed to the fixing plate 3-6. The stud 3-7 on the inner surface of the fixing plate 3-6 is rotated and fitted by a bearing, and the other end engages with the thread in the connecting hole 3-4, forming a helical transmission structure. The positioning pin 3-8 and the reinforcing rod 3-10 on the side surface of the fixing plate 3-6 correspond to the positioning hole 3-2 and the stabilizing hole 3-9 of the connecting seat 2, respectively, with a clearance fit between the rod and the hole.

[0026] During operation, insert the top of the support leg into slot 3-1 of connector 2, rotate stud 3-7, and under the action of the thread, fixing plate 3-6 moves closer to connector 2. Positioning pin 3-8 is inserted into positioning hole 3-2 for radial positioning, while reinforcing rod 3-10 is inserted into stabilizing hole 3-9 to further enhance connection stability until fixing plate 3-6 and connector 2 are tightly fitted, completing the quick docking of support leg and connector 2. Disassembly is simple: rotate stud 3-7 in the opposite direction to separate the support leg. The cooperation of positioning pin 3-8 and reinforcing rod 3-10 ensures accurate docking of the support leg, avoiding installation deviations; the helical drive of stud 3-7 allows for controllable connection force, ensuring tightness; the cooperation of reinforcing rod 3-10 and stabilizing hole 3-9 forms a multi-directional force-bearing structure, distributing the load on the support leg and improving overall connection strength; the guiding function of connecting rod 3-5 and connecting hole 3-4 prevents jamming during docking, adapting to the frequent disassembly and assembly needs of semi-trailer support legs. This component achieves quick docking and stable connection between the support leg and the connecting seat 2 through multi-directional positioning and threaded fastening.

[0027] like Figures 1-3 As shown in the figure, the retractable assembly 4 in this embodiment includes a pair of bearing seats 4-1. The bearing seats 4-1 are fixed at both ends of the bottom surface of the main frame 1. A shaft 4-2 is rotatably connected inside the bearing seat 4-1. The two ends of the shaft 4-2 are respectively fixedly connected to the side end face of the connecting seat 2. A connecting frame 4-3 is provided on the shaft 4-2. A rotating block 4-4 is rotatably connected to the lower end of the connecting frame 4-3 through a pin. A hydraulic telescopic cylinder 4-5 is rotatably connected to the bottom of the main frame 1 through a pin. The output end of the hydraulic telescopic cylinder 4-5 is fixedly connected to the rotating block 4-4.

[0028] In some examples, a retraction assembly 4 is designed to enable rapid deployment and retraction of the connecting seat 2, adapting to different states of the semi-trailer during driving and parking. The axle seats 4-1 at both ends of the bottom surface of the main frame 1 are fixed by welding. The two ends of the shaft 4-2 are rotatably connected to the axle seats 4-1, and the middle part is welded to the side end face of the connecting seat 2, allowing the connecting seat 2 to rotate around the axis of the shaft 4-2, thus enabling deployment and retraction. The connecting frame 4-3 on the shaft 4-2 is welded and fixed to the shaft 4-2. The rotating block 4-4 at the lower end is rotatably connected to the connecting frame 4-3 via a pin. The hydraulic telescopic cylinder 4-5 at the bottom of the main frame 1 is rotatably connected via a pin, and its output end is welded to the rotating block 4-4. The hydraulic telescopic cylinder 4-5 is connected to the semi-trailer's hydraulic system via an oil pipe, enabling telescopic movement.

[0029] During operation, when the semi-trailer needs support after parking, the hydraulic telescopic cylinder 4-5 extends, pushing the rotating block 4-4 to rotate around the pin of the connecting frame 4-3. This causes the connecting frame 4-3 and the axle 4-2 to rotate, and the connecting seat 2 flips downwards with the axle 4-2 until it is perpendicular to the main frame 1, completing the unfolding action and providing a support base for the support legs. When traveling, the hydraulic telescopic cylinder 4-5 retracts, pulling the connecting frame 4-3 and the axle 4-2 to rotate in the opposite direction. The connecting seat 2 flips upwards until it fits against the main frame 1, achieving retraction and reducing space occupation during travel. The driving method of the hydraulic telescopic cylinder 4-5 ensures smooth and powerful retraction and extension of the connecting seat 2, allowing for quick switching between states. The cooperation between the axle seat 4-1 and the axle 4-2 ensures flexible rotation and precise positioning of the connecting seat 2. The triangular connecting frame 4-3 enhances the stability of the transmission structure and can withstand the load when the connecting seat 2 is unfolded. The rotating pair with the pin connection adapts to multi-angle transmission requirements and avoids deformation of components under stress. This component combines hydraulic drive with hinge transmission to enable the quick unfolding and retraction of the connecting seat 2, improving the ease of use of the semi-trailer.

[0030] For example, such as Figure 1 As shown, the shaft 4-2 can rotate 90° around the bearing 4-1.

[0031] In some examples, the axle 4-2 can rotate 90° around the axle seat 4-1, allowing precise control over the unfolding and retracting states of the connecting seat 2. When unfolded, the 90° rotation makes the connecting seat 2 perpendicular to the main frame 1, providing stable support for the support legs; when retracted, the 90° rotation in the opposite direction allows the connecting seat 2 to fit snugly against the main frame 1, reducing space occupation. This angle design balances support stability and ease of storage, ensuring that the connecting seat 2 can be accurately positioned in both states, adapting to the different operating conditions of the semi-trailer.

[0032] For example, such as Figure 1 As shown, the main frame 1 has an overall C-shaped structure, and several fixing holes 5 are provided at both ends of the main frame 1.

[0033] In some examples, the main frame 1 has a C-shaped structure, and the fixing holes 5 at both ends can be bolted to the semi-trailer frame. The C-shaped structure can distribute the load transmitted by the support legs, enhance the overall load-bearing capacity, and provide space for the retraction and extension of the connecting seat 2. The fixing holes 5 make it easy for the main frame 1 to be adapted to different vehicle models, improve the structural versatility, ensure that the main frame 1 is firmly connected to the semi-trailer, and ensure stability during support.

[0034] For example, such as Figure 1 As shown, a pair of limiting rings 6 are provided at both ends of the shaft 4-2, and the limiting rings 6 are located on both sides of the shaft seat 4-1.

[0035] In some examples, the limiting rings 6 at both ends of the shaft 4-2 are located on both sides of the bearing seat 4-1, which can restrict the axial movement of the shaft 4-2. The limiting rings 6 are integrally formed with the shaft 4-2, conforming to the side of the bearing seat 4-1, preventing the shaft 4-2 from moving during rotation or under force, ensuring the fitting accuracy between the shaft 4-2 and the bearing seat 4-1, and preventing the connecting seat 2 from shaking and affecting the support stability. At the same time, the limiting rings 6 can reduce the wear of the shaft 4-2 and the bearing seat 4-1, extending the service life of the components.

[0036] In actual use: The structure is installed on the semi-trailer through the fixing holes 5 of the main frame 1. The top of the support leg is inserted into the slot 3-1 of the connecting seat 2. The stud 3-7 is rotated to bring the fixing plate 3-6 close to the connecting seat 2. The positioning pin 3-8 is inserted into the positioning hole 3-2. The reinforcing rod 3-10 is embedded in the stabilizing hole 3-9 to achieve a stable connection between the support leg and the connecting seat 2. When unfolded, the hydraulic telescopic cylinder 4-5 extends to push the connecting frame 4-3, and the shaft 4-2 rotates 90° around the shaft seat 4-1. The connecting seat 2 flips to a vertical position accordingly. When retracted, the hydraulic telescopic cylinder 4-5 retracts, and the connecting seat 2 rotates in the opposite direction to fit against the main frame 1. The limiting ring 6 prevents the shaft 4-2 from moving axially. No manual cranking is required throughout the process, and the unfolding and retraction are completed quickly.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A support connection structure for a semi-trailer, characterized in that, include: The main frame (1) and a pair of connecting seats (2) are both disposed on the main frame (1); A connecting component (3) is disposed on the connecting base (2); A retractable assembly (4) is disposed between the connecting seat (2) and the main frame (1); The connecting component (3) includes a pair of slots (3-1), each slot (3-1) being opened at the bottom of the connecting seat (2). Positioning holes (3-2) are opened on both sides of the connecting seat (2). Threaded holes (3-3) are opened inside the side surface of the connecting seat (2). A pair of connecting holes (3-4) are opened on the side surface of the connecting seat (2). The connecting holes (3-4) are located on both sides of the threaded holes (3-3). Connecting rods (3-5) are movably fitted into each connecting hole (3-4).

2. The support connection structure for a semi-trailer according to claim 1, characterized in that, One end of the connecting rod (3-5) is fixedly connected to a fixing plate (3-6), and a stud (3-7) is rotatably fitted onto the inner surface of the fixing plate (3-6). One end of the stud (3-7) is connected to the threaded hole (3-3) by a threaded engagement.

3. The support connection structure for a semi-trailer according to claim 2, characterized in that, The side surface of the fixing plate (3-6) is provided with a positioning post (3-8), the positioning post (3-8) and the positioning hole (3-2) are located on the same axis, the side surface of the connecting seat (2) is provided with a pair of stabilizing holes (3-9), and the side surface of the fixing plate (3-6) is provided with a pair of reinforcing rods (3-10), the reinforcing rods (3-10) are corresponding to the positions of the stabilizing holes (3-9).

4. The support connection structure for a semi-trailer according to claim 1, characterized in that, The retractable assembly (4) includes a pair of bearing seats (4-1), which are fixed at both ends of the bottom surface of the main frame (1). A shaft (4-2) is rotatably connected inside the bearing seat (4-1), and both ends of the shaft (4-2) are fixedly connected to the side end face of the connecting seat (2).

5. A support connection structure for a semi-trailer according to claim 4, characterized in that, A connecting frame (4-3) is provided on the shaft (4-2). A rotating block (4-4) is rotatably connected to the lower end of the connecting frame (4-3) via a pin. A hydraulic telescopic cylinder (4-5) is rotatably connected to the bottom of the main frame (1) via a pin. The output end of the hydraulic telescopic cylinder (4-5) is fixedly connected to the rotating block (4-4).

6. The support connection structure for a semi-trailer according to claim 4, characterized in that, The shaft (4-2) can rotate 90° around the bearing (4-1).

7. A support connection structure for a semi-trailer according to claim 1, characterized in that, The main frame (1) has a C-shaped structure, and several fixing holes (5) are provided at both ends of the main frame (1).

8. The support connection structure for a semi-trailer according to claim 4, characterized in that, A pair of limiting rings (6) are provided at both ends of the shaft (4-2), and the limiting rings (6) are located on both sides of the shaft seat (4-1).

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