Three-point supporting and connecting assembly for front frame and rear frame of small-sized loader
By using the three-point support connection assembly of the front and rear frames of the small loader, and utilizing the rotating connector to achieve flexible tire swing, the problems of high center of gravity and poor tire fit are solved, thereby improving the safety and reliability of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-02-14
- Publication Date
- 2026-04-10
AI Technical Summary
The current method of connecting the front and rear frames of small loaders results in a high center of gravity, making them prone to tipping over and causing poor tire contact with the ground, which poses a safety hazard.
The system employs a three-point support connection assembly, including front and rear frames, connecting plates, and rotating connectors. The rotating connectors, consisting of a pin fixing plate, a fixed shaft, a fixing pin, and a limit bolt, allow for flexible tire movement, ensuring that the tires always remain in contact with the ground and preventing slippage.
It significantly lowers the vehicle's center of gravity, improves rollover resistance, ensures tire contact with the ground, enhances operational and driving safety, simplifies the structure, reduces costs, and extends equipment lifespan.
Smart Images
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Abstract
Description
Technical Field
[0001] This invention relates to the field of vehicle frame connection technology, and specifically to a three-point support connection assembly for the front and rear frames of a small loader. Background Technology
[0002] With their advantages of flexibility, convenience, and ease of operation, small loaders are widely used in small-scale engineering construction, agricultural production, municipal maintenance, and other scenarios. Their operating environments are mostly rugged terrain or complex sites, which places stringent requirements on the stability of the vehicle's driving and operation. As the core load-bearing structure of the loader, the connection method between the front and rear frames directly determines the vehicle's center of gravity distribution, anti-rollover capability, and ground adhesion. A reasonable connection structure is the key to ensuring the safe and efficient operation of the equipment and is of great significance for improving operational safety and reducing accident risks.
[0003] However, the existing equipment lacks overall vehicle stability. The single articulated shaft connection results in a high center of gravity. Combined with the narrow body width, it is prone to rollover due to center of gravity shift when operating in complex terrain. At the same time, the tires have poor contact with the ground, making them prone to slipping, which poses a serious safety hazard. Summary of the Invention
[0004] In view of the above-mentioned shortcomings of the prior art, the present invention provides a three-point support connection assembly for the front and rear frames of a small loader, which can effectively solve the problems in the background art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a three-point support connection assembly for the front and rear frames of a small loader, comprising: a front frame, a rear frame, a front connecting plate, a rear connecting plate, and a rotating connector; The rotating connector consists of a pin fixing plate, a fixing shaft, a fixing pin, and a limit bolt, which allows the equipment to swing left and right during operation, ensuring that the tires always keep in contact with the ground and avoiding the risk of slippage. The front connecting plate and the rear connecting plate are fixedly installed on the front frame and the rear frame, respectively, and the front connecting plate and the rear connecting plate are perpendicular to the ground and aligned with each other. The front connecting plate is fixedly provided with hinge ear plate No. 1, hinge ear plate No. 2 and hinge ear plate No. 3 from top to bottom on the side near the rear connecting plate. The rear connecting plate is provided with hinge ear plate No. 5 on the side near the front connecting plate and hinge ear plate No. 4 on the other side. A hinged connecting rod is movably provided between the first hinged ear plate and the second hinged ear plate.
[0006] It also includes that each end of the hinged link is fixedly installed with a rotating connector, and the fifth hinge ear plate is also fixedly installed with a rotating connector. The pin fixing plate in the rotating connector is movably installed at both ends of the hinged link and the fifth hinge ear plate, and the fixing shaft is movably installed between the two pin fixing plates. The pin fixing plate is fixed to the hinged link or the fifth hinge ear plate by a limiting bolt.
[0007] It also includes a fixed pin that is movably inserted into the inside of the fixed shaft, and a fixed pin installed on the hinge connecting rod near the front connecting plate, with a positioning connecting plate and a fixing nut at each end, and one end of the positioning connecting plate being inserted into the first hinge ear plate.
[0008] It also includes that one end of the fixing nut is inserted into the second hinge ear plate, the upper surface of the positioning connecting plate and the first hinge ear plate are in contact with each other, and the fixing nut is in contact with the lower surface of the second hinge ear plate.
[0009] It also includes a fixed pin on the hinge link away from the front connecting plate that is movably inserted into the inner side of the fourth hinge ear plate, and a fixed pin on the fifth hinge ear plate that is movably inserted into the inner side of the third hinge ear plate. A positioning connecting plate is fixedly provided on one end of the fixed pin, and the positioning connecting plate and the upper surface of the third hinge ear plate are in contact with each other.
[0010] The technical solution provided by this invention has the following advantages compared with the prior art: This device utilizes a three-point support structure to create a stable triangular force-bearing system, significantly lowering the vehicle's center of gravity and dramatically improving its anti-rollover capability. Combined with the flexible adjustment characteristics of the rotating connector, it ensures the tires remain in contact with the ground, preventing slippage and greatly enhancing operational and driving safety. It eliminates the need for an additional swing bracket, simplifying the overall structure while reducing manufacturing costs and the probability of failure, thus improving equipment reliability. The design of the rotating connector and articulated link provides superior self-adjustment performance, flexibly adapting to rough terrain, reducing impact on the chassis, and extending the equipment's service life. Attached Figure Description
[0011] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0012] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 As described in the embodiments of the present invention Figure 1 Schematic diagram of Part A; Figure 3 This is a partial structural schematic diagram of an embodiment of the present invention; Figure 4 This is a schematic diagram of the hinged connecting rod structure in an embodiment of the present invention; Figure 5 This is a schematic diagram of the fixing pin structure in an embodiment of the present invention; Figure 6 This is a schematic diagram of the front connecting plate structure in an embodiment of the present invention; Figure 7 This is a schematic diagram of the rear connecting plate structure in an embodiment of the present invention; Figure 8 This is a schematic diagram of the hinged connecting rod structure in an embodiment of the present invention.
[0013] The numbers in the diagram represent: 1. Front frame; 2. Rear frame; 3. Front connecting plate; 4. Rear connecting plate; 5. No. 1 hinge plate; 6. No. 2 hinge plate; 7. No. 3 hinge plate; 8. No. 4 hinge plate; 9. No. 5 hinge plate; 10. Hinge connecting rod; 11. Pin fixing plate; 12. Fixing shaft; 13. Fixing pin; 14. Positioning connecting plate; 15. Fixing nut; 16. Limit bolt. Detailed Implementation
[0014] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0015] The present invention will be further described below with reference to embodiments. Example
[0016] Please see Figures 1-5 This invention provides a technical solution: a three-point support connection assembly for the front and rear frames of a small loader, comprising: a front frame 1, a rear frame 2, a front connecting plate 3, a rear connecting plate 4, and a rotating connector. The rotating connector consists of a pin fixing plate 11, a fixing shaft 12, a fixing pin 13, and a limiting bolt 16, enabling the equipment to swing left and right during operation. The front connecting plate 3 and the rear connecting plate 4 are respectively fixedly installed on the front frame 1 and the rear frame 2. The front connecting plate 3 and the rear connecting plate 4 are perpendicular to the ground and aligned with each other. The front connecting plate 3 is fixedly provided with a first hinge ear plate 5, a second hinge ear plate 6, and a third hinge ear plate 7 from top to bottom on the side near the rear connecting plate 4. The rear connecting plate 4 is provided with a fifth hinge ear plate 9 on the side near the front connecting plate 3, and a fourth hinge ear plate 8 on the other side. The rotating connector is fixedly installed on both ends of the hinge rod 10 and the fifth hinge ear plate 9. The pin fixing plate 11 in the rotating connector is movably installed on both ends of the hinge rod 10 and the fifth hinge ear plate 9. The fixed shaft 12 is movably installed between the two pin fixing plates 11. The pin fixing plate 11 is fixed on the hinge rod 10 or the fifth hinge ear plate 9 by the limit bolt 16. The fixed pin 13 is movably inserted into the inner side of the fixed shaft 12. The fixed pin 13 is installed on the hinge connecting rod 10 near the front connecting plate 3. The two ends of the fixed pin 13 are respectively provided with positioning connecting plate 14 and fixing nut 15, and one end of the positioning connecting plate 14 is inserted into the first hinge ear plate 5.
[0017] In specific implementation: the front connecting plate 3 is fixed on the front frame 1, and the first hinge ear plate 5, the second hinge ear plate 6, and the third hinge ear plate 7 are set from top to bottom to form three connection nodes on the front side; the rear connecting plate 4 is fixed on the rear frame 2, and the fifth hinge ear plate 9 is set on one side and the fourth hinge ear plate 8 is set on the other side to form two connection nodes on the rear side.
[0018] Please see Figures 4-8 The present invention provides a technical solution: one end of the fixing nut 15 is inserted into the second hinge ear plate 6, the positioning connecting plate 14 and the upper surface of the first hinge ear plate 5 are in contact, and the fixing nut 15 and the lower surface of the second hinge ear plate 6 are in contact. The fixing pin 13 on the hinge link 10, at the end away from the front connecting plate 3, is movably inserted into the inner side of the fourth hinge ear plate 8. One end of the fixing pin 13 on the fifth hinge ear plate 9 is movably inserted into the inner side of the third hinge ear plate 7. One end of the fixing pin 13 is fixedly provided with a positioning connecting plate 14, which is in contact with the upper surface of the third hinge ear plate 7.
[0019] In specific implementation: the end of the hinged connecting rod 10 near the front connecting plate 3 is connected to the first hinge ear plate 5 and the second hinge ear plate 6 through the fixing pin 13. The positioning connecting plate 14 is attached to the upper surface of the first hinge ear plate 5, and the fixing nut 15 is attached to the lower surface of the second hinge ear plate 6 to achieve bidirectional positioning. The end of the hinged connecting rod 10 away from the front connecting plate 3 is inserted into the inner side of the fourth hinge ear plate 8 through the fixing pin 13 to form the upper rear connection. The fifth hinge ear plate 9 is inserted into the inner side of the third hinge ear plate 7 through the fixing pin 13, and the positioning connecting plate 14 is attached to the upper surface of the third hinge ear plate 7 to form the lower rear connection. The rotating connector consists of a pin fixing plate 11, a fixing shaft 12, a fixing pin 13, and a limiting bolt 16. Its core function is to transmit power and allow flexible swinging. The pin fixing plate 11 is fixed to both ends of the hinged connecting rod 10 and the fifth hinge ear plate 9 by the limiting bolt 16. The fixing shaft 12 is movably installed between the two sets of pin fixing plates 11. The fixing pin 13 is inserted into the inner side of the fixing shaft 12 to form a rotatable connection structure. When the loader is traveling or operating on rough terrain, the difference in ground elevation will cause the tires to shift, which will then be transmitted to the front and rear frames. At this time, the fixed shaft 12 in the rotating connector can rotate flexibly around the fixed pin 13, causing the articulated link 10 to swing synchronously, so that the front and rear frames can adaptively adjust their relative angles according to the changes in terrain. This adjustment process can ensure that all tires are always in contact with the ground, avoiding the risk of slippage or rollover caused by the tires being suspended in the air, while reducing the impact on the frame. The positioning connecting plate 14 and the fixing nut 15 respectively fit onto the upper and lower surfaces of the corresponding hinge ear plate, and are locked through by the fixing pin 13 to limit the axial displacement of the fixing pin 13 and prevent the connection from loosening. The limiting bolt 16 firmly fixes the pin fixing plate 11 to the hinge connecting rod 10 or the No. 5 hinge ear plate 9 to prevent the rotating connecting parts from falling off and to ensure the overall structural stability.
[0020] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.
Claims
1. A three-point support connection assembly for the front and rear frames of a small loader, characterized in that, include: Front frame (1), rear frame (2), front connecting plate (3), rear connecting plate (4) and rotating connecting parts; The rotating connector consists of a pin fixing plate (11), a fixing shaft (12), a fixing pin (13), and a limiting bolt (16), which enables the equipment to swing left and right during operation, ensuring that the tires always keep in contact with the ground and avoiding the risk of slippage. The front connecting plate (3) and the rear connecting plate (4) are respectively fixedly installed on the front frame (1) and the rear frame (2), and the front connecting plate (3) and the rear connecting plate (4) are perpendicular to the ground and aligned with each other; The front connecting plate (3) is fixedly provided with a first hinge ear plate (5), a second hinge ear plate (6) and a third hinge ear plate (7) from top to bottom on the side near the rear connecting plate (4). The rear connecting plate (4) is provided with a fifth hinge ear plate (9) on the side near the front connecting plate (3) and a fourth hinge ear plate (8) on the other side. A hinge link (10) is movably provided between the first hinge ear plate (5) and the second hinge ear plate (6).
2. The three-point support connection assembly for the front and rear frames of a small loader according to claim 1, characterized in that: Rotary connecting parts are fixedly installed at both ends of the hinged connecting rod (10), and rotating connecting parts are also fixedly installed on the fifth hinge ear plate (9). The pin fixing plate (11) in the rotating connecting part is movably installed at both ends of the hinged connecting rod (10) and the fifth hinge ear plate (9). The fixing shaft (12) is movably installed between the two pin fixing plates (11). The pin fixing plate (11) is fixed to the hinged connecting rod (10) or the fifth hinge ear plate (9) by the limiting bolt (16).
3. The three-point support connection assembly for the front and rear frames of a small loader according to claim 2, characterized in that: The fixed pin (13) is movably inserted into the inside of the fixed shaft (12). The fixed pin (13) installed on the hinge connecting rod (10) near the front connecting plate (3) has a positioning connecting plate (14) and a fixing nut (15) at both ends, and one end of the positioning connecting plate (14) is inserted into the first hinge ear plate (5).
4. The three-point support connection assembly for the front and rear frames of a small loader according to claim 3, characterized in that: One end of the fixing nut (15) is inserted into the second hinge ear plate (6), the upper surface of the positioning connecting plate (14) and the first hinge ear plate (5) are in contact with each other, and the lower surface of the fixing nut (15) and the second hinge ear plate (6) are in contact with each other.
5. The three-point support connection assembly for the front and rear frames of a small loader according to claim 4, characterized in that: The fixed pin (13) on the hinge link (10) away from the front connecting plate (3) is movably inserted into the inner side of the fourth hinge ear plate (8). One end of the fixed pin (13) on the fifth hinge ear plate (9) is movably inserted into the inner side of the third hinge ear plate (7). One end of the fixed pin (13) is fixedly provided with a positioning connecting plate (14), and the positioning connecting plate (14) and the upper surface of the third hinge ear plate (7) are in contact.