Tricycle rear axle

Abstract

The invention discloses a tricycle rear axle which comprises a frame, a rear axle assembly and a bearing set arranged between the rear axle assembly and the frame, a mounting assembly is arranged between the rear axle assembly and the bearing set, and a supporting assembly is arranged on the rear axle assembly. The rear axle assembly comprises a differential speed reducer assembly and an axle housing assembly; the supporting assembly comprises a protective cover, the protective cover is rotationally installed on the axle housing assembly, the differential reducer assembly is arranged in the protective cover, a control piece is arranged on the protective cover, a rotating driving source and a fixing piece are arranged between the protective cover and the frame, and the rotating driving source drives the protective cover to rotate so that the protective cover can be in a vertical state. The fixing piece bears and fixes the protective cover, and the control piece drives the rear axle assembly to move downwards; power transmission is achieved between the installation assembly and the protective cover, so that when the protective cover rotates to be in a vertical state, the installation assembly is separated from the rear axle assembly. Through rotation of the protective cover, the rear axle assembly is protected, and stable and rapid disassembly and assembly are achieved at the same time.

Description

Technical Field

[0001] This invention relates to the field of vehicle engineering technology, and more particularly to a rear axle for a three-wheeled vehicle. Background Technology

[0002] The rear axle of a three-wheeled vehicle is a core assembly component at the end of the three-wheel drive system. It integrates five major functions: power transmission, deceleration and torque increase, differential steering, load-bearing support, and braking. It is a key structure that determines the vehicle's load-bearing capacity, driving stability, and power efficiency. It is mainly installed at the rear of the vehicle body, connecting the frame and the rear wheels, and bearing the weight of the entire vehicle, traction force, braking force, and lateral force.

[0003] The conventional method for mounting and fixing the tricycle body to the rear axle is through a leaf spring suspension system. This involves welding leaf spring supports above the left and right axle tubes of the rear axle, mounting a single leaf spring under the frame beam, and hinged the leaf springs at both ends to the front and rear supports of the frame using lugs, pins, and rubber sleeves. The leaf springs are then secured to the rear axle supports with U-bolts at the center locking point. However, this conventional mounting and fixing method has the following drawbacks: In conventional installation and fixing methods, when replacing the rear axle, the jack needs to be placed at the bottom of the rear axle for support. The horizontal support surface of the jack and the arc surface at the bottom of the rear axle are irregular contact surfaces, and the fit between the two is poor, with only local line contact or point contact. The support force is uneven, and slippage and tipping are prone to occur during the lifting process, as well as inaccurate positioning and high safety risks during disassembly and assembly.

[0004] Therefore, how to provide a rear axle for a tricycle is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] One object of the present invention is to provide a rear axle for a tricycle. The present invention achieves both protection of the rear axle assembly and stable and quick disassembly and assembly through the rotation of the protective cover.

[0006] According to an embodiment of the present invention, a rear axle for a three-wheeled vehicle includes a frame, a rear axle assembly, a load-bearing assembly disposed between the rear axle assembly and the frame, an installation assembly disposed between the rear axle assembly and the load-bearing assembly, and a support assembly disposed on the rear axle assembly. The rear axle assembly includes the differential reducer assembly and the axle housing assembly; The support components include a protective cover, which is rotatably mounted on the axle housing assembly. The differential reducer assembly is located inside the protective cover. The protective cover is equipped with control components. A rotation drive source and a fixing component are provided between the protective cover and the frame. The rotation drive source drives the protective cover to rotate, making the protective cover vertical, and the fixing component supports and fixes the protective cover. The control components drive the rear axle assembly to move downward. The power transmission between the mounting components and the protective cover allows the mounting components to separate from the rear axle assembly when the protective cover rotates to a vertical position, thereby causing the rear axle assembly to detach from the load-bearing assembly.

[0007] Furthermore, the protective cover includes a protective baffle and supporting side plates on both sides. The output end of the rotation drive source is hinged to the inclined surface of the protective baffle, and the rear end is hinged to the frame. The rotation drive source drives the protective cover to rotate around the sleeves at both ends of the axle housing assembly as the axis.

[0008] Furthermore, the fasteners include a mounting plate and a backing plate. The mounting plate is fixedly installed on the protective baffle, and the backing plate is fixedly installed on the frame. When the drive source rotates the protective cover to a vertical position, the mounting plate adheres to the backing plate.

[0009] Furthermore, the control components include a bearing arc plate and a moving drive source. A limit groove is provided on the side of the support side plate, and the bearing arc plate is slidably disposed in the limit groove. The sleeves at both ends of the bridge housing assembly are placed on the bearing arc plate. A slider is provided on one side of the bearing arc plate. A guide groove is also provided on the support side plate, and the slider is slidably disposed in the guide groove. A screw is rotatably connected to the guide groove through a bearing. The screw is threadedly connected to the slider. The moving drive source is fixedly installed on the support side plate and its output end is fixedly connected to the screw.

[0010] Furthermore, the limiting groove includes a vertical groove and a horizontal groove. The guide groove is located on one side of the vertical groove. When the axle housing assembly moves in the vertical groove to the junction between the horizontal groove and the vertical groove, it moves out of the support side plate through the horizontal groove.

[0011] Furthermore, the mounting components are assembled onto the load-bearing assembly using lifting lugs; The mounting assembly includes two arc-shaped plates, with a fixed shaft fixedly connected between the two lifting lugs. One end of each arc-shaped plate is sleeved on the fixed shaft and hinged to each other. A torsion spring is installed at the hinge between the two arc-shaped plates. The tail ends of the two arc-shaped plates do not overlap and are spaced apart along the arc extension direction. The sleeve of the bridge housing assembly is located between the two arc-shaped plates, and the tail ends of the arc-shaped plates are set as arc surfaces.

[0012] Furthermore, multiple ball bearing carriers are provided on the inner side of the arc-shaped plate, and a hinge plate is provided between the ball bearing carriers and the arc-shaped plate. The ball bearing carriers are hinged to the arc-shaped plate through the hinge plate, and a torsion spring is installed at the hinge. The concave surface of the ball bearing carrier is designed as an anti-slip surface.

[0013] Furthermore, the mounting assembly also includes a fixed extrusion plate and a movable extrusion plate, both of which are fitted onto the axle housing assembly. The ends of the fixed extrusion plate and the movable extrusion plate that are in contact with each other are both set as inclined surfaces. The fixed extrusion plate is fixedly mounted on the support side plate, and the movable extrusion plate is slidably mounted on the sleeve of the axle housing assembly via a limiting track. When the fixed extrusion plate rotates, it drives the movable extrusion plate to move forward and enter the inner cavity formed by the two arc-shaped plates. One end of the movable extrusion plate contacts the end of the ball bearing plate with balls. As the movable extrusion plate continues to move forward, it pushes the ball bearing plate toward the sleeve surface of the axle housing assembly. A fixed plate is fixedly connected to the periphery of the movable extrusion plate, and a return spring is fixedly connected to one side of the fixed plate. When the movable extrusion plate enters the two arc plates, one end of the return spring contacts the lifting lug and is in a compressing state.

[0014] Furthermore, a limiting sleeve is fixedly connected to the top of each of the two arc-shaped plates, and two limiting rods are fixedly connected to one side of the fixed plate, with the limiting rods sleeved inside the limiting sleeves.

[0015] Furthermore, the concave surface of the arc-shaped plate has multiple slots, and multiple locking blocks are fixedly connected to the outer surface of the movable extrusion plate, with the locking blocks and slots fitting together.

[0016] The beneficial effects of this invention are: This invention involves installing a protective cover on the rear axle assembly. When the cover is horizontal, the axle housing assembly supports it and protects the differential reducer assembly. When the cover rotates to a vertical position, the mounting components separate from the rear axle assembly, allowing the rear axle assembly to detach from the load-bearing assembly. The protective cover continues to support the rear axle assembly and is secured by fasteners to prevent it from falling. Simultaneously, a control mechanism moves the rear axle assembly downwards to contact the ground, allowing it to be disassembled from the tricycle beam and the protective cover. Compared to the traditional single-point jack support method, the protective cover support offers advantages such as a larger support area, uniform fit, stable support posture, simultaneous support and movement, and no need for external tools, significantly improving the stability and convenience of rear axle disassembly and maintenance.

[0017] This invention, through the arrangement of the mounting components, causes the fixed extrusion plate to rotate simultaneously during the rotation of the protective cover. The rotation of the fixed extrusion plate causes the movable extrusion plate to move towards the ball bearing carrier plate. Through the hinge between the ball bearing carrier plate and the arc-shaped plate, the ball bearing carrier plate moves towards the sleeve of the axle housing assembly. Thus, multiple arc-shaped plates lock the sleeve of the axle housing assembly, thereby quickly fixing the rear axle assembly and achieving full constraint fixation of the sleeve. Compared with traditional U-bolts and ordinary clamp fixing methods, it can effectively resist the alternating torsional torque generated during the operation of the rear axle, avoid loosening of the fixation and displacement of the rear axle due to torque impact, and significantly improve the torsional stability and driving safety of the rear axle installation and fixation.

[0018] This invention utilizes a rapid opening and closing mechanism between two arc-shaped plates, along with a movable extrusion plate that drives a ball bearing carrier plate to securely fasten the axle housing assembly's sleeve. Compared to traditional installation methods that require individual alignment and repeated tightening of nuts, and the need to loosen bolts one by one during disassembly, this invention significantly increases assembly speed within a limited operating space. Furthermore, the movement of the movable extrusion plate allows the limiting rods at both ends to enter the limiting sleeves. As one end of the limiting rod contacts the inner bottom surface of the limiting sleeve, the rear axle assembly automatically shifts and undergoes position correction, achieving automatic positioning and installation. Attached Figure Description

[0019] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of the rear axle of a tricycle proposed in this invention; Figure 2 This is a schematic diagram of the rear axle assembly structure proposed in this invention.

[0020] Figure 3 This is one of the structural schematic diagrams of the combination of the arc-shaped plate and the movable extrusion plate proposed in this invention.

[0021] Figure 4 The present invention proposes Figure 3 Schematic diagram of the structure of section A.

[0022] Figure 5 This is the second schematic diagram of the structure combining the arc-shaped plate and the movable extrusion plate proposed in this invention.

[0023] Figure 6 The present invention proposes Figure 5 Schematic diagram of section B in the middle.

[0024] Figure 7 This is a schematic diagram of the horizontal state structure of the protective cover in the support component proposed in this invention.

[0025] Figure 8 This is one of the structural schematic diagrams of the separation of the arc-shaped plate and the movable extrusion plate proposed in this invention.

[0026] Figure 9 The present invention proposes Figure 8 Schematic diagram of the C-section structure.

[0027] Figure 10 This is the second schematic diagram of the separation structure of the arc-shaped plate and the movable extrusion plate proposed in this invention.

[0028] Figure 11 The present invention proposes Figure 10 Schematic diagram of the structure of section D.

[0029] Figure 12 This is a schematic diagram of the vertical state structure of the protective cover in the support component proposed in this invention.

[0030] Figure 13 This is a schematic diagram of the structure of two arc-shaped plates hinged together as proposed in this invention.

[0031] In the picture: 100, frame; 200. Rear axle assembly; 210. Differential reducer assembly; 220. Axle housing assembly; 300. Bearing assembly; 301. Lifting lug; 302. Fixed shaft; 400. Support assembly; 410. Protective cover; 411. Protective baffle; 412. Support side plate; 420. Control component; 421. Bearing arc plate; 422. Motion drive source; 423. Limiting groove; 424. Slider; 425. Guide groove; 426. Screw; 427. Vertical groove; 428. Horizontal groove; 430. Rotation drive source; 440. Fixing component; 441. Hanging plate; 442. Support plate; 500. Mounting components; 501. Arc plate; 502. Ball bearing carrier plate; 503. Hinge plate; 504. Fixed extrusion plate; 505. Movable extrusion plate; 506. Limiting track; 507. Fixing plate; 508. Return spring; 509. Limiting sleeve; 510. Limiting rod; 511. Slot; 512. Locking block. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0033] Example 1 like Figures 1 to 3 as well as Figure 12 As shown, an embodiment of the present invention provides a rear axle for a tricycle, including a frame 100, a rear axle assembly 200, a load-bearing assembly 300 disposed between the rear axle assembly 200 and the frame 100, an installation assembly 500 disposed between the rear axle assembly 200 and the load-bearing assembly 300, and a support assembly 400 disposed on the rear axle assembly 200. The rear axle assembly 200 includes a differential reducer assembly 210 and an axle housing assembly 220; The support assembly 400 includes a protective cover 410, which is rotatably mounted on the axle housing assembly 220. The differential reducer assembly 210 is located inside the protective cover 410. A control component 420 is provided on the protective cover 410. A rotation drive source 430 and a fixing component 440 are provided between the protective cover 410 and the frame 100. The rotation drive source 430 drives the protective cover 410 to rotate, making the protective cover 410 vertical, and the fixing component 440 supports and fixes the protective cover 410. The control component 420 drives the rear axle assembly 200 to move downward. The power transmission between the mounting component 500 and the protective cover 410 causes the mounting component 500 to separate from the rear axle assembly 200 when the protective cover 410 rotates to a vertical position, thereby causing the rear axle assembly 200 to detach from the load-bearing assembly 300.

[0034] The traditional method of installing and fixing the rear axle assembly 200 to the frame 100 beam is a leaf spring suspension installation. That is, fixing plate 507 spring supports are welded above the left and right axle tubes of the rear axle, and an integral leaf spring is hung under the frame 100 beam. The two ends of the leaf spring are hinged to the front and rear brackets of the frame 100 with lifting lugs 301, pins, and rubber sleeves. The middle locking point of the leaf spring is locked to the rear axle support with U-bolts. However, with the traditional installation and fixing method, when replacing the rear axle assembly 200, a jack needs to be placed at the bottom of the rear axle for support. The horizontal support surface of the jack and the arc surface of the bottom of the rear axle are irregular contact surfaces, with poor fit between the two, only local line contact or point contact, uneven support force, easy slippage and tipping during the lifting process, inaccurate positioning, and high safety risks during disassembly and assembly; In contrast, this application installs a protective cover 410 on the rear axle assembly 200 to protect the differential reduction assembly. When the protective cover 410 is in a horizontal position, it protects the differential reduction assembly 210. The protective cover 410 is rotated by a rotation drive source 430. During the transition from a horizontal to a vertical position, the mounting assembly 500 is no longer locked to the rear axle assembly 200. When the protective cover 410 is in a vertical position, the fixing member 440 secures the top of the protective cover 410 to prevent it from detaching and colliding with the ground when the mounting assembly 500 is no longer fixed to the rear axle assembly 200. At this time, the control component 420 drives the rear axle assembly 200 to move downward. During the downward movement, the rear axle assembly 200 is detached from the mounting component 500. When the rear axle assembly 200 moves to the ground, the wheel hubs at both ends of the rear axle assembly 200 directly rotate and move out of the protective cover 410 and the vehicle body, realizing the rapid disassembly of the rear axle assembly 200. Compared with the traditional single-point support method of jacks, the support of the protective cover 410 has the advantages of large support area, uniform fit, stable support posture, synchronous support and movement, and no need for external tools, which significantly improves the stability and convenience of rear axle disassembly and maintenance.

[0035] See also Figure 12 As shown, in order to achieve the rotation of the drive shield 410, the shield 410 includes a protective baffle 411 and two supporting side plates 412 on both sides. The output end of the rotation drive source 430 is hinged to the inclined surface of the protective baffle 411, and the rear end is hinged to the frame 100. The rotation drive source 430 drives the shield 410 to rotate about the sleeves at both ends of the axle housing assembly 220 as the axis. This application does not limit the specific structure of the rotation drive source 430, but preferably it is an electric push rod. The specific structure and working principle of the electric push rod are existing technologies and will not be described in detail here. The protective baffle 411 is a folded baffle. When the protective baffle 411 is in a horizontal arrangement, its bottom forms a horizontal plane and its side forms an inclined protective slope. At the same time, the rotation drive source 430 is in an inclined state. The output end of the rotation drive source 430 is hinged to the inclined surface of the protective baffle 411 and the tail end is hinged to the frame 100 so that when the rotation drive source 430 is running, it can drive the protective cover 410 to rotate around the sleeve of the axle housing assembly 220 as the axis. At the same time, when the protective cover 410 is rotated to a vertical state, the electric push rod will not collide with the protective cover 410. See also Figure 7 and Figure 12 As shown, in order to provide support for the protective cover 410 when it rotates to a vertical position, the fixing member 440 includes a hanging plate 441 and a backing plate 442. The hanging plate 441 is fixedly installed on the protective baffle 411, and the backing plate 442 is fixedly installed on the frame 100. When the rotation drive source 430 drives the protective cover 410 to rotate to a vertical position, the hanging plate 441 is attached to the backing plate 442. When the protective cover 410 is in a horizontal protective state, the rear axle assembly 200 is fixed to the load-bearing assembly 300 via the mounting component 500. At this time, the protective cover 410 is mounted on the sleeves on both sides of the axle housing assembly 220, and the rear axle assembly 200 supports the protective cover 410. When the rear axle assembly 200 needs to be disassembled, the protective cover 410 is rotated by rotating the drive source 430, changing from a horizontal state to a vertical state. After this, the mounting component 500 and the rear axle assembly 200 are no longer locked together. When the protective cover 410 is in a vertical position, the rear axle assembly 200 and the load-bearing assembly 300 are no longer fixed. Therefore, the rear axle assembly 200 cannot provide support for the protective cover 410. Due to the weight of the protective cover 410 and the rear axle assembly 200, the rear axle assembly 200 is prone to detaching from the load-bearing assembly 300, causing the protective cover 410 to fall downwards and resulting in damage to the rear axle assembly 200 and the protective cover 410. Therefore, when the drive source 430 rotates and moves the protective cover 410 to a vertical position... In the specified state, the hanging plate 441 on the top of the inclined surface of the protective cover 410 moves to the top of the abutment plate 442 fixedly mounted on the frame 100, so that the abutment plate 442 supports the hanging plate 441. At the same time, one side of the abutment plate 442 contacts one side of the two support side plates 412. Through the thrust provided by the rotation drive source 430, and the support of the abutment plate 442 on the hanging plate 441, the contact between the abutment plate 442 and the support side plates 412, the protective cover 410 is fixed on the abutment plate 442, providing the protective cover 410 with... The protective cover 410 is supported to prevent it from falling and colliding with the ground, thus avoiding damage to the protective cover 410 and the rear axle assembly 200. At the same time, when the protective cover 410 is in a vertical position, its bottom does not contact the ground. Since the diameter of the wheel hub of the rear axle assembly 200 is much larger than the diameter of the sleeve in the axle housing assembly 220, there is a distance between the axle housing assembly 220 and the ground when the wheel hub touches the ground. Therefore, the bottom of the protective cover 410 does not contact the ground and will not affect the disassembly of the rear axle assembly 200.

[0036] See also Figure 7 and Figure 12As shown, in order to facilitate the disassembly and assembly of the rear axle assembly 200, the rear axle assembly 200 can move up and down on the support side plate 412. The control component 420 includes a bearing arc plate 421 and a movement drive source 422. A limit groove 423 is formed on the side of the support side plate 412, and the bearing arc plate 421 is slidably disposed in the limit groove 423. The sleeves at both ends of the axle housing assembly 220 are placed on the bearing arc plate 421. A slider 424 is provided on one side of the bearing arc plate 421, and a guide groove 425 is also formed on the support side plate 412. The slider 424 slides... Located within the guide groove 425, a screw 426 is rotatably connected to the guide groove 425 via a bearing. The screw 426 is threadedly connected to the slider 424. The moving drive source 422 is fixedly installed on the support side plate 412 and its output end is fixedly connected to the screw 426. The limiting groove 423 includes a vertical groove 427 and a horizontal groove 428. The guide groove 425 is located on one side of the vertical groove 427. When the bridge housing assembly 220 moves within the vertical groove 427 to the junction between the horizontal groove 428 and the vertical groove 427, it moves out of the support side plate 412 through the horizontal groove 428. This application does not limit the specific structure of the mobile drive source 422, but preferably a motor. The specific structure and working principle of the motor are existing technologies and will not be described in detail here. Regardless of whether the protective cover 410 is in a horizontal or vertical state, or during the transition between the two states, the sleeves at both ends of the axle housing assembly 220 are always between the bearing arc plate 421 and the groove wall of the limiting groove 423, so that the sleeves at both ends of the axle housing assembly 220 will not detach from the bearing arc plate 421. When the protective cover 410 is in a vertical state, the motor drives the screw 426 to rotate. Through the threaded connection between the screw 426 and the slider 424, and the sliding connection between the slider 424 and the guide groove 425, the slider 424 and the bearing arc plate 421 at one end of the slider 424 are driven to move downward. At this time, through the gravity of the rear axle assembly 200 itself, the rear axle assembly 200 and the bearing arc plate 421 move downward synchronously. The bottom of the transverse groove 428 The side closest to the vertical groove 427 is concave downwards and in an arc shape. When the bearing arc plate 421 moves the rear axle assembly 200 below the vertical groove 427 and the wheel hubs at both ends of the rear axle assembly 200 contact the ground, the sleeves on both sides of the rear axle assembly 200 are exactly located within the transverse groove 428. When the protective cover 410 is in a vertical state, one end of the bottom of the bearing arc plate 421 is raised upwards, forming a protruding limiting structure to restrict the position of the sleeves at both ends of the axle housing assembly 220. To prevent detachment, when the bearing arc plate 421 moves the rear axle assembly 200 to the area where the horizontal groove 428 and the vertical groove 427 intersect, the screw 426 continues to rotate, causing the bearing arc plate 421 to enter the recess at the intersection. When the bottom raised end of the bearing arc plate 421 detaches from the bottom of the sleeve circumference at both ends of the axle housing assembly 220, the rear axle assembly 200 is disassembled from the protective cover 410 by the rotation of the wheel hub, thereby disassembling the rear axle assembly 200.

[0037] Example 2 like Figures 3-6 , Figures 8-11 as well as Figure 13 As shown, the traditional method of mounting the rear axle assembly 200 to the tricycle uses U-bolts. However, due to the limited distance between the frame 100 beam and the ground, the available space during installation is limited, increasing the difficulty of bolt installation. Furthermore, the rear axle is prone to swaying when supported by a jack, further complicating the torque consistency of the U-bolts on both sides during assembly. Over time, this can lead to rear axle twisting under stress, strain on the differential and half-shafts, accelerated gear wear, oil leaks, and abnormal noises. Additionally, the frame 100 beam and rear axle have common manufacturing errors, and the U-bolts are fixed holes, making fine-tuning during installation impossible. This further complicates the installation process due to the limited operating space and the rear axle's tendency to sway when supported by a jack. To enable quick assembly and disassembly between the rear axle assembly 200 and the load-bearing assembly 300, the mounting component 500 is mounted on the load-bearing assembly 300 via lifting lugs 301. The mounting component 500 includes two arc-shaped plates 501, with a fixed shaft 302 fixedly connected between the two lifting lugs 301. One end of each arc-shaped plate 501 is sleeved on the fixed shaft 302 and hinged to each other. A torsion spring is installed at the hinge between the two arc-shaped plates 501. The tail ends of the two arc-shaped plates 501 do not overlap and are spaced apart along the arc-shaped extension direction. The sleeve of the axle housing assembly 220 is located between the two arc-shaped plates 501, and the tail ends of the arc-shaped plates 501 are set as arc surfaces. Limiting sleeves 509 are fixedly connected to the top ends of both arc-shaped plates 501. Two limiting rods 510 are fixedly connected to one side of the fixed plate 507, and the limiting rods 510 are sleeved inside the limiting sleeves 509. When the protective cover 410 rotates to a vertical position, the limiting rod 510 separates from the limiting sleeve 509, and the limiting rod 510 no longer fixes the two hinged arc-shaped plates 501. At this time, the two arc-shaped plates 501 are in a free state. Under the action of gravity of the rear axle assembly 200, the rear axle assembly 200 moves downward and squeezes the bottom of the two arc-shaped plates 501, forcing the bottom of the two arc-shaped plates 501 to rotate outward, and causing the torsion springs therein to be in a compressed state. When the axle housing... When the axle housing 220 moves downward and disengages from the arc plate 501, the torsion spring resets and drives the two arc plates 501 to reset, thus facilitating the disassembly of the rear axle assembly 200. When the rear axle assembly 200 needs to be installed, the control component 420 drives the rear axle assembly 200 to move upward, so that the sleeve of the axle housing assembly 220 contacts the bottom of the two arc plates 501. Since the tail ends of the two arc plates 501 do not overlap and are spaced apart along the arc extension direction, and the tail ends are set as arc surfaces. When the sleeve contacts the arc surface at the tail end of the two arc plates 501, the sleeve squeezes the tail end of the two arc plates 501, thereby forcing the bottom of the two arc plates 501 to rotate outward, and causing the torsion springs therein to be in a compressed state. When the axle housing assembly 220 enters between the two arc plates 501, the torsion springs reset and drive the two arc plates 501 to reset, thereby facilitating the installation of the rear axle assembly 200. At the same time, when the protective cover 410 rotates, it drives the limiting rod 510 to move forward, so that the limiting rod 510 coincides with the limiting sleeve 509. The limiting rod 510 fixes the limiting sleeve 509, so that the two arc plates 501 no longer rotate, thereby limiting the sleeves at both ends of the axle housing assembly 220 between the two arc plates 501.

[0038] like Figures 3-6 , Figures 8-11 as well as Figure 13As shown, in order to fix the sleeves at both ends of the axle housing assembly 220 and to automatically position the rear axle assembly 200 during installation, multiple ball bearing plates 502 are provided on the inner side of the arc plate 501. A hinge plate 503 is provided between the ball bearing plates 502 and the arc plate 501. The ball bearing plates 502 are hinged to the arc plate 501 through the hinge plate 503, and a torsion spring is installed at the hinge. The concave surface of the ball bearing plates 502 is set as an anti-slip surface. The mounting assembly 500 also includes a fixed pressing plate 504 and a movable pressing plate 505. Both the fixed pressing plate 504 and the movable pressing plate 505 are sleeved on the axle housing assembly 220. The ends of the fixed pressing plate 504 and the movable pressing plate 505 that are in contact with each other are both set as inclined surfaces. The fixed pressing plate 504 is fixedly installed on the support side plate 412, and the movable pressing plate 505 is slidably disposed on the axle housing through the limiting rail 506. On the sleeve of assembly 220, when the fixed extrusion plate 504 rotates, it drives the movable extrusion plate 505 to move forward and enter the inner cavity formed by the two arc plates 501. One end of the movable extrusion plate 505 contacts the end of the ball bearing plate 502 with the balls. As the movable extrusion plate 505 continues to move forward, it pushes the ball bearing plate 502 to move towards the sleeve surface of the bridge housing assembly 220. A fixed plate 507 is fixedly connected to the circumference of the movable extrusion plate 505. A return spring 508 is fixedly connected to one side of the fixed plate 507. When the movable extrusion plate 505 enters the two arc plates 501, one end of the return spring 508 contacts the lifting lug 301 and is in a pressing state. Multiple slots 511 are opened on the concave surface of the arc plate 501. Multiple blocks 512 are fixedly connected to the outer surface of the movable extrusion plate 505. The blocks 512 and the slots 511 fit together. When the protective cover 410 is in a vertical position, the inclined surfaces of the fixed pressing plate 504 and the movable pressing plate 505 are in contact. When the protective cover 410 is in a horizontal position, the inclined front ends of the fixed pressing plate 504 and the movable pressing plate 505 approach each other. During the process of the protective cover 410 rotating from a vertical to a horizontal position, the protective cover 410 drives the movable pressing plate 505 to rotate on the sleeve of the bridge housing assembly 220, so that the inclined surfaces between the fixed pressing plate 504 and the movable pressing plate 505 change from overlapping to gradually separating. Through the setting of the limiting rail 506, the movable pressing plate 505 cannot rotate, thereby driving the movable pressing plate 505 to move forward. 5. Move forward and enter between the two arc-shaped plates 501, and contact the ball bearing side of the ball carrier plate 502. The ball carrier plate 502 includes a base plate, a ball receiving hole, a ball limiting structure, and an assembly positioning structure. The balls are located in the ball receiving hole and can roll freely. The limiting structure prevents the balls from falling out. The assembly structure is used to connect and fix with external components. The specific structure and working principle of the ball carrier plate 502 are existing technologies. One side of the ball carrier plate 502 is hinged to the arc-shaped plate 501 through a hinge plate 503. When the movable extrusion plate 505 moves forward and pushes the ball baffle, the ball baffle moves towards the circumferential surface of the bridge housing assembly 220. During the continuous forward movement of the movable extrusion plate 505, multiple balls are... The ball bearing baffle locks the axle housing assembly 220 around its perimeter. The concave surface of the ball bearing carrier plate 502 is designed as an anti-slip surface. The specific structure of the anti-slip surface is not limited; it can be designed as anti-slip teeth or wear-resistant bushings to prevent wear over time. It also prevents slippage and rotation under heavy loads, rather than relying solely on friction. To further prevent slippage and rotation between the rear axle assembly 200 and the mounting component 500, multiple slots 511 are formed on the concave surface of the arc-shaped plate 501. Multiple locking blocks 512 that mate with the slots 511 are provided on the outer surface of the movable pressing plate 505. When the movable pressing plate 505 moves inward into the arc-shaped plate 501, the locking blocks 512 overlap with the slots 511, locking the mounting component 500 and the rear axle assembly 200 together. When the movable pressing plate 505 moves forward, the return spring 508 on one side of the fixed plate 507 is in a pressing state. When the rear axle assembly 200 needs to be disassembled, the protective cover 410 drives the fixed pressing plate 504 to rotate in the opposite direction. This causes the inclined front end of the fixed pressing plate 504 to disengage from the inclined front end of the movable pressing plate 505 and gradually become coplanar. Then, the elastic force provided by the return spring 508 causes the movable pressing plate 505 to move towards the fixed pressing plate 504. This causes the movable pressing plate 505 to disengage from the arc plate 501 and the limiting rod 510 to disengage from the limiting sleeve 509. As a result, the mounting assembly 500 no longer locks the rear axle assembly 200 in place.

[0039] Working principle: A protective cover 410 for protecting the differential reduction assembly is installed on the rear axle assembly 200. When the protective cover 410 is in a horizontal state, it protects the differential reduction assembly 210. The protective cover 410 can be rotated by rotating the drive source 430. After the protective cover 410 changes from a horizontal to a vertical position, the mounting assembly 500 and the rear axle assembly 200 are no longer locked together. The hanging plate 441 on the top of the inclined surface of the protective cover 410 moves to the top of the abutment plate 442 fixedly mounted on the frame 100, so that the abutment plate 442 supports the hanging plate 441. At the same time, one side of the abutment plate 442 contacts one side of the two support side plates 412. Through the thrust provided by the rotation drive source 430, the support of the abutment plate 442 on the hanging plate 441, and the contact between the abutment plate 442 and the support side plates 412, the protective cover 410 is fixed on the abutment plate 442, providing support for the protective cover 410. The motor drives the screw 426 to rotate, and the... Through the threaded connection between the screw 426 and the slider 424, and the sliding connection between the slider 424 and the guide groove 425, the slider 424 and the bearing arc plate 421 at one end of the slider 424 are driven to move downward. At this time, the rear axle assembly 200 and the bearing arc plate 421 move downward synchronously due to the gravity of the rear axle assembly 200 itself. When the bearing arc plate 421 drives the rear axle assembly 200 to move below the vertical groove 427 and the wheel hubs at both ends of the rear axle assembly 200 contact the ground, the sleeves on both sides of the rear axle assembly 200 are located in the horizontal groove 428. Through the rotation of the wheel hub, the rear axle assembly 200 is disassembled from the protective cover 410, thereby disassembling the rear axle assembly 200. When installing the rear axle assembly 200, the control component 420 drives the rear axle assembly 200 to move upward, so that the sleeve of the axle housing assembly 220 contacts the bottom of the two arc-shaped plates 501. Since the tail ends of the two arc-shaped plates 501 do not overlap and are spaced apart along the arc extension direction, and the tail ends are set as arc surfaces. When the sleeve contacts the arc surfaces at the tail ends of the two arc-shaped plates 501, the sleeve presses against the tail ends of the two arc-shaped plates 501, thereby forcing the bottom of the two arc-shaped plates 501 to rotate outward, and causing the torsion springs within them to be in a compressed state. When the bridge housing assembly 220 enters between the two arc-shaped plates 501, the torsion springs reset, and drive the two arc-shaped plates 501 to reset. During the process of the protective cover 410 rotating from a vertical state to a horizontal state, the protective cover 410 drives the movable pressing plate 505 to rotate on the sleeve of the bridge housing assembly 220, so that the inclined surfaces between the fixed pressing plate 504 and the movable pressing plate 505 change from overlapping to gradually separating. Through the setting of the limiting rail 506, the movable pressing plate 505 cannot rotate, thereby driving the movable pressing plate 505 to move forward. The ball bearing plate 502 moves between the two arc-shaped plates 501 and contacts the ball bearing side of the ball bearing plate 502. One side of the ball bearing plate 502 is hinged to the arc-shaped plates 501 via the hinge plate 503. When the movable extrusion plate 505 moves forward, it pushes the ball bearing baffle, causing the ball bearing baffle to move towards the circumference of the axle housing assembly 220. As the movable extrusion plate 505 continues to move forward, multiple ball bearing baffles lock onto the circumference of the axle housing assembly 220. At the same time, the limiting rod 510 coincides with the limiting sleeve 509, and the limiting rod 510 fixes the limiting sleeve 509 so that the two arc-shaped plates 501 no longer rotate. This limits the sleeves at both ends of the axle housing assembly 220 between the two arc-shaped plates 501, thereby completing the installation of the axle assembly 200 and restoring the protective function of the protective cover 410.

[0040] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A rear axle for a three-wheeled vehicle, comprising a frame (100), a rear axle assembly (200), and a load-bearing assembly (300) disposed between the rear axle assembly (200) and the frame (100), characterized in that, An installation assembly (500) is provided between the rear axle assembly (200) and the load-bearing assembly (300), and a support assembly (400) is provided on the rear axle assembly (200). The rear axle assembly (200) includes a differential reducer assembly (210) and an axle housing assembly (220). The support assembly (400) includes a protective cover (410), which is rotatably mounted on the axle housing assembly (220). The differential reducer assembly (210) is located inside the protective cover (410). A control component (420) is provided on the protective cover (410). A rotation drive source (430) and a fixing component (440) are provided between the protective cover (410) and the frame (100). The rotation drive source (430) drives the protective cover (410) to rotate, so that the protective cover (410) is in a vertical state, and the fixing component (440) supports and fixes the protective cover (410). The control component (420) drives the rear axle assembly (200) to move downward. The power transmission between the mounting assembly (500) and the protective cover (410) is such that when the protective cover (410) is rotated to a vertical position, the mounting assembly (500) separates from the rear axle assembly (200), thereby causing the rear axle assembly (200) to detach from the load-bearing assembly (300).

2. The rear axle of a tricycle according to claim 1, characterized in that, The protective cover (410) includes a protective baffle (411) and two supporting side plates (412) on both sides. The output end of the rotation drive source (430) is hinged to the inclined surface of the protective baffle (411), and the tail end is hinged to the frame (100). The rotation drive source (430) drives the protective cover (410) to rotate around the sleeves at both ends of the axle housing assembly (220).

3. The rear axle of a tricycle according to claim 2, characterized in that, The fastener (440) includes a mounting plate (441) and a backing plate (442). The mounting plate (441) is fixedly installed on the protective baffle (411), and the backing plate (442) is fixedly installed on the frame (100). When the rotating drive source (430) drives the protective cover (410) to rotate into a vertical state, the mounting plate (441) adheres to the backing plate (442).

4. The rear axle of a tricycle according to claim 3, characterized in that, The control component (420) includes a bearing arc plate (421) and a moving drive source (422). A limit groove (423) is provided on the side of the support side plate (412). The bearing arc plate (421) is slidably disposed in the limit groove (423). The sleeves at both ends of the bridge housing assembly (220) are placed on the bearing arc plate (421). A slider (424) is provided on one side of the bearing arc plate (421). A guide groove (425) is also provided on the support side plate (412). The slider (424) is slidably disposed in the guide groove (425). A screw (426) is rotatably connected in the guide groove (425) through a bearing. The screw (426) is threadedly connected to the slider (424). The moving drive source (422) is fixedly installed on the support side plate (412) and its output end is fixedly connected to the screw (426).

5. A rear axle for a tricycle according to claim 4, characterized in that, The limiting groove (423) includes a vertical groove (427) and a horizontal groove (428). The guide groove (425) is located on one side of the vertical groove (427). When the bridge housing assembly (220) moves to the junction between the horizontal groove (428) and the vertical groove (427) in the vertical groove (427), it moves out of the support side plate (412) through the horizontal groove (428).

6. A rear axle for a tricycle according to claim 5, characterized in that, The mounting assembly (500) is mounted on the load-bearing assembly (300) via lugs (301); The mounting assembly (500) includes two arc-shaped plates (501), and a fixed shaft (302) is fixedly connected between two lifting lugs (301). One end of each arc-shaped plate (501) is sleeved on the fixed shaft (302) and hinged to each other. A torsion spring is installed at the hinge between the two arc-shaped plates (501). The tail ends of the two arc-shaped plates (501) do not overlap and are spaced apart along the arc extension direction. The sleeve of the bridge housing assembly (220) is located between the two arc-shaped plates (501), and the tail ends of the arc-shaped plates (501) are set as arc surfaces.

7. A rear axle for a tricycle according to claim 6, characterized in that, Multiple ball bearing plates (502) are provided on the inner side of the arc plate (501). A hinge plate (503) is provided between the ball bearing plate (502) and the arc plate (501). The ball bearing plate (502) is hinged to the arc plate (501) through the hinge plate (503), and a torsion spring is installed at the hinge. The concave surface of the ball bearing plate (502) is provided as an anti-slip surface.

8. A rear axle for a tricycle according to claim 7, characterized in that, The mounting assembly (500) also includes a fixed extrusion plate (504) and a movable extrusion plate (505). Both the fixed extrusion plate (504) and the movable extrusion plate (505) are sleeved on the axle housing assembly (220). The ends of the fixed extrusion plate (504) and the movable extrusion plate (505) that are in contact with each other are both set as inclined surfaces. The fixed extrusion plate (504) is fixedly installed on the support side plate (412). The movable extrusion plate (505) is slidably disposed on the sleeve of the axle housing assembly (220) through the limiting rail (506). When the fixed extrusion plate (504) rotates, it drives the movable extrusion plate (505) to move forward and enter the inner cavity formed by the two arc plates (501). One end of the movable extrusion plate (505) contacts the end of the ball bearing plate (502) with balls. During the continuous forward movement of the movable extrusion plate (505), it pushes the ball bearing plate (502) to move towards the sleeve surface of the axle housing assembly (220). A fixed plate (507) is fixedly connected to the periphery of the movable extrusion plate (505). A return spring (508) is fixedly connected to one side of the fixed plate (507). When the movable extrusion plate (505) enters the two arc plates (501), one end of the return spring (508) contacts the lifting lug (301) and is in a pressing state.

9. A rear axle for a tricycle according to claim 8, characterized in that, The top ends of the two arc-shaped plates (501) are fixedly connected to the limiting sleeves (509), and two limiting rods (510) are fixedly connected to one side of the fixed plate (507). The limiting rods (510) are sleeved inside the limiting sleeves (509).

10. A rear axle for a tricycle according to claim 9, characterized in that, The concave surface of the arc plate (501) is provided with multiple slots (511), and multiple blocks (512) are fixedly connected to the outer surface of the movable extrusion plate (505). The blocks (512) and the slots (511) fit together.

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