Electric wheelchair front wheel damping suspension mechanism

Abstract

The utility model provides electric wheelchair front wheel damping suspension mechanism, including electric wheelchair main body, electric wheelchair main body is fixedly connected with the frame on, the front side fixedly connected with two symmetrical installation blocks of frame, the below of two installation blocks all is provided with wheel mounting bracket, the damping suspension subassembly is provided between wheel mounting bracket and installation block, two wheel mounting bracket's both sides board all rotationally cooperated with front wheel, the bottom of two installation blocks is provided with movable slot upwards, the both sides inner wall of movable slot is provided with first connecting hole outwardly and penetrates, through the connecting barrel cooperation two -fold buffering damping subassembly of setting up obliquely, not only can respond to the vibration of vertical direction, when the wheel hits the step, through the rotation of connecting barrel and multiple buffering, can effectively alleviate the inertia impact that the wheel stops suddenly brought, reduces the risk of the passenger leaning forward, guarantees the safety of the passenger.

Description

Technical Field

[0001] This utility model relates to the field of wheelchair shock absorption suspension technology, specifically to a front wheel shock absorption suspension mechanism for electric wheelchairs. Background Technology

[0002] As an important means of transportation for people with mobility impairments, the comfort and stability of electric wheelchairs during operation are crucial. Most existing electric wheelchairs have vertically arranged shock-absorbing structures on the front wheels to reduce vertical vibrations and provide a relatively stable riding experience. However, because the passenger's view is obstructed by the wheelchair, making it difficult to observe the road conditions, when the front wheel accidentally hits a step, the wheel stops instantly due to rigid contact. Under inertia, the passenger's body will uncontrollably tilt forward. This forward tilt not only causes severe discomfort but can also lead to bumps and injuries, posing a safety hazard, especially for elderly or disabled users with limited mobility or slow reaction times. Utility Model Content

[0003] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a front wheel shock-absorbing suspension mechanism for electric wheelchairs to solve the problems mentioned in the background. This utility model has a novel structure. By using an inclined connecting cylinder in conjunction with two buffer shock-absorbing components, it can not only cope with vertical vibrations, but also effectively mitigate the inertial impact caused by sudden wheel stop when the wheel hits a step, through the rotation of the connecting cylinder and multiple buffers, reducing the risk of the passenger tilting forward and ensuring the passenger's safety.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an electric wheelchair front wheel shock-absorbing suspension mechanism, comprising an electric wheelchair body, a frame fixedly connected to the electric wheelchair body, two symmetrically arranged mounting blocks fixedly connected to the front side of the frame, a wheel mounting bracket provided below each of the two mounting blocks, a shock-absorbing suspension assembly provided between the wheel mounting bracket and the mounting block, a front wheel rotatably engaged between the side plates of the two wheel mounting brackets, and an upward-facing movable groove provided at the bottom of the two mounting blocks, with a first connecting hole extending outward through the inner walls of both sides of the movable groove.

[0005] Furthermore, the shock-absorbing suspension assembly includes a connecting cylinder disposed in a movable groove on the two mounting blocks, and a first connecting shaft is fixedly connected to both sides of the outer wall of the connecting cylinder, the first connecting shaft being rotatably fitted in a first connecting hole.

[0006] Furthermore, sliding grooves are provided on both sides of the inner wall of the movable groove, and a partition block is fixedly connected between the upper and lower inner walls of the sliding grooves on both sides, forming a displacement groove between the partition block and one side inner wall of the sliding groove.

[0007] Furthermore, the inner wall of the displacement groove is slidably fitted with a sliding plate, and the inner wall of the groove is slidably fitted with a connecting frame both vertically and horizontally. A first damping rod and a first buffer spring are fixedly connected between one side of the sliding plate and one side of the connecting frame, and the first buffer spring is sleeved around the periphery of the first damping rod.

[0008] Furthermore, the two side plates of the connecting frame are provided with second connecting holes, and the outer walls of the connecting cylinder are fixedly connected with second connecting shafts. The second connecting shafts are rotatably fitted into the second connecting holes, and the connecting cylinder is inclinedly arranged in the movable groove.

[0009] Furthermore, a fixed plate is fixedly connected to the upper side of the wheel mounting bracket, a connecting ring is rotatably fitted to the outer wall of the connecting cylinder, a connecting rod is fixedly connected to the upper side of the fixed plate and slidably fitted to the inner wall of the connecting cylinder, and a second buffer spring sleeved on the outside of the connecting rod is fixedly connected between the fixed plate and the connecting ring.

[0010] Furthermore, an installation groove is provided on the top of the inner wall of the connecting cylinder, and a second damping rod is fixedly installed on the top wall of the installation groove. A bearing is provided between the end of the telescopic shaft of the second damping rod and the end of the connecting rod. The end of the connecting rod is fixedly connected to the outer ring of the bearing, and the end of the telescopic shaft of the second damping rod is fixedly connected to the inner ring of the bearing.

[0011] Furthermore, a limiting plate is fixedly connected to the end of the telescopic shaft of the second damping rod, and a limiting groove is provided on the inner wall of the connecting cylinder to slide with the limiting plate.

[0012] The beneficial effects of this utility model are: 1. The front wheel shock absorption suspension mechanism of this electric wheelchair, through the inclined connecting cylinder and the two buffer shock absorption components, can not only cope with vertical vibrations, but also effectively alleviate the inertial impact caused by the sudden stop of the wheel when the wheel hits a step, by the rotation of the connecting cylinder and multiple buffers, reducing the risk of the passenger tilting forward and ensuring the safety of the passenger.

[0013] 2. The front wheel shock absorption suspension mechanism of this electric wheelchair forms a dual damping and spring shock absorption system through the first damping rod, the second damping rod, the first buffer spring, and the second buffer spring. It consumes and buffers the impact force from different directions and stages. Compared with a single shock absorption structure, the shock absorption effect is more significant, improving riding comfort. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the front wheel shock absorption suspension mechanism of the electric wheelchair of this utility model; Figure 2 This is a schematic diagram of the internal structure of the mounting block of this utility model; Figure 3 This utility model Figure 3 -Enlarged structural diagram at point A; Figure 4 This is a schematic diagram of the connection between the shock-absorbing suspension assembly and the wheel mounting frame of this utility model; Figure 5 This utility model Figure 4 - Enlarged structural diagram at point B.

[0015] In the diagram: 1. Main body of the electric wheelchair; 2. Frame; 3. Mounting block; 4. Wheel mounting bracket; 5. Front wheel; 6. Shock-absorbing suspension assembly; 601. Connecting cylinder; 602. First connecting shaft; 603. Slide groove; 604. Separator block; 605. Displacement groove; 606. Slide plate; 607. Connecting frame; 608. First damping rod; 609. First buffer spring; 610. Second connecting hole; 611. Second connecting shaft; 612. Fixing plate; 613. Connecting ring; 614. Connecting rod; 615. Second buffer spring; 616. Mounting groove; 617. Second damping rod; 618. Bearing; 619. Limiting groove; 620. Limiting plate; 7. Movable groove; 8. First connecting hole. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0017] Please refer to Figures 1 to 5 This utility model provides a technical solution: a front wheel shock-absorbing suspension mechanism for an electric wheelchair, including an electric wheelchair body 1, a frame 2 fixedly connected to the electric wheelchair body 1, two symmetrically arranged mounting blocks 3 fixedly connected to the front side of the frame 2, a wheel mounting bracket 4 provided below each of the two mounting blocks 3, a shock-absorbing suspension assembly 6 provided between the wheel mounting bracket 4 and the mounting block 3, a front wheel 5 rotatably engaged between the side plates of the two wheel mounting brackets 4, and an upwardly opening movable groove 7 at the bottom of the two mounting blocks 3, with first connecting holes 8 extending outwards through the inner walls on both sides of the movable groove 7.

[0018] In this embodiment, the shock-absorbing suspension assembly 6 includes a connecting cylinder 601 disposed within a movable groove 7 on two mounting blocks 3. A first connecting shaft 602 is fixedly connected to both sides of the outer wall of the connecting cylinder 601. The first connecting shaft 602 rotatably engages within a first connecting hole 8. A sliding groove 603 is formed on both sides of the inner wall of the movable groove 7. A partition block 604 is fixedly connected between the upper and lower inner walls of the sliding groove 603 on both sides. A displacement groove 605 is formed between the partition block 604 and one inner wall of the sliding groove 603. A sliding plate 606 slidably engages with the inner wall of the displacement groove 605. The inner wall of the slide 603 is slidably fitted with a connecting frame 607 both vertically and horizontally. A first damping rod 608 and a first buffer spring 609 are fixedly connected between one side of the slide plate 606 and one side of the connecting frame 607. The first buffer spring 609 is sleeved on the periphery of the first damping rod 608. The two side plates of the connecting frame 607 are provided with second connecting holes 610. The outer walls of the connecting cylinder 601 are fixedly connected with second connecting shafts 611. The second connecting shafts 611 are rotatably fitted in the second connecting holes 610. The connecting cylinder 601 is inclinedly arranged in the movable groove 7.

[0019] Specifically, while the connecting cylinder 601 provides internal cushioning, the impact of the wheel mounting bracket 4 causes the connecting cylinder 601 to rotate around the first connecting shaft 602 within the movable groove 7. As the connecting cylinder 601 rotates, the connecting bracket 607 slides within the sliding groove 603, causing the sliding plate 606 to slide up and down within the displacement groove 605. At this time, the first damping rod 608 and the first buffer spring 609 work together. The first buffer spring 609 further absorbs vibration energy, and the first damping rod 608 controls the sliding speed of the sliding plate 606 through damping, preventing the connecting cylinder 601 from rotating excessively. Through the cooperation of these two cushioning and shock-absorbing structures, the impact force generated by the step collision is significantly weakened, reducing the vibration transmitted to the electric wheelchair body 1.

[0020] In this embodiment, a fixing plate 612 is fixedly connected to the upper side of the wheel mounting bracket 4. A connecting ring 613 is rotatably fitted to the outer wall of the connecting cylinder 601. A connecting rod 614, which slides and rotatably fits on the inner wall of the connecting cylinder 601, is fixedly connected to the upper side of the fixing plate 612. A second buffer spring 615, sleeved on the outside of the connecting rod 614, is fixedly connected between the fixing plate 612 and the connecting ring 613. An installation groove 616 is formed at the top of the inner wall of the connecting cylinder 601. A second damping rod 617 is fixedly installed on the wall. A bearing 618 is provided between the end of the telescopic shaft of the second damping rod 617 and the end of the connecting rod 614. The end of the connecting rod 614 is fixedly connected to the outer ring of the bearing 618, and the end of the telescopic shaft of the second damping rod 617 is fixedly connected to the inner ring of the bearing 618. A limiting plate 620 is fixedly connected to the end of the telescopic shaft of the second damping rod 617. A limiting groove 619 is provided on the inner wall of the connecting cylinder 601 to slide with the limiting plate 620.

[0021] Specifically, when the front wheel of the electric wheelchair accidentally comes into contact with a step, the wheel mounting bracket 4 is first subjected to an impact force. This impact force is transmitted to the connecting rod 614 through the fixed plate 612. Due to the elasticity of the second buffer spring 615, the impact force is initially buffered. At the same time, the connecting rod 614 drives the inner ring of the bearing 618 to move, and the telescopic shaft of the second damping rod 617 is compressed. Its internal damping structure consumes some energy and restricts the rapid movement of the connecting rod 614.

[0022] When the device is in use, if the front wheel of the electric wheelchair accidentally hits a step, the impact force first acts on the wheel mounting frame 4 and is transmitted to the connecting rod 614 through the fixed plate 612. At this instant, the second buffer spring 615 sleeved on the outside of the connecting rod 614 immediately undergoes elastic deformation to provide initial cushioning; at the same time, the connecting rod 614 drives the inner ring of the bearing 618 to move, causing the telescopic shaft of the second damping rod 617 to compress, and its internal damping structure to activate, consuming part of the impact energy and limiting the movement speed of the connecting rod 614. Meanwhile, the impact force on the wheel mounting frame 4 pushes the connecting cylinder 601 to rotate around the first connecting shaft 602 in the movable groove 7. When the connecting cylinder 601 rotates, the connecting frame 607 slides in the sliding groove 603, thereby driving the sliding plate 606 to slide up and down in the displacement groove 605. At this time, the first damping rod 608 and the first buffer spring 609 work together. The first buffer spring 609 further absorbs vibration energy, and the first damping rod 608 controls the sliding speed of the slide plate 606 through its damping characteristics to prevent the connecting cylinder 601 from rotating excessively. Through the dual action of the internal buffer structure and the external rotation buffer structure of the connecting cylinder 601, the impact force generated by the collision of the step is weakened layer by layer, reducing the vibration transmitted to the main body 1 of the electric wheelchair and effectively ensuring the safety of the passenger.

[0023] The first damping rod 608 and the second damping rod 617 adopt conventional damping structures in the art (for example, hydraulic damping rods, pneumatic damping rods or spring damping combination structures disclosed in the prior art). Their specific construction and working principle are known to those skilled in the art and are not the innovation of this invention, so they will not be described in detail here.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It is obvious to those skilled in the art that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model.

[0025] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electric wheelchair front wheel shock absorbing suspension mechanism comprising an electric wheelchair body (1), characterized in that: The electric wheelchair body (1) is fixedly connected to a frame (2). Two symmetrically arranged mounting blocks (3) are fixedly connected to the front side of the frame (2). A wheel mounting bracket (4) is provided below each of the two mounting blocks (3). A shock-absorbing suspension assembly (6) is provided between the wheel mounting bracket (4) and the mounting block (3). A front wheel (5) is rotatably fitted between the two side plates of the two wheel mounting brackets (4). An active groove (7) is opened upward at the bottom of the two mounting blocks (3). A first connecting hole (8) is opened through the inner walls of the two sides of the active groove (7) to the outside.

2. The electric wheelchair front wheel shock absorbing suspension mechanism according to claim 1, characterized in that: The shock-absorbing suspension assembly (6) includes a connecting cylinder (601) disposed in the movable groove (7) on the two mounting blocks (3). The outer walls of the connecting cylinder (601) are fixedly connected to the first connecting shaft (602) on both sides. The first connecting shaft (602) is rotatably fitted in the first connecting hole (8).

3. The electric wheelchair front wheel shock absorbing suspension mechanism according to claim 2, characterized in that: The inner walls of the movable groove (7) are provided with sliding grooves (603) on both sides. A partition block (604) is fixedly connected between the upper and lower inner walls of the sliding grooves (603) on both sides. A displacement groove (605) is formed between the partition block (604) and one inner wall of the sliding groove (603).

4. The front wheel shock absorption suspension mechanism for an electric wheelchair according to claim 3, characterized in that: The inner wall of the displacement groove (605) is slidably fitted with a sliding plate (606), and the inner wall of the sliding groove (603) is slidably fitted with a connecting frame (607) both vertically and horizontally. A first damping rod (608) and a first buffer spring (609) are fixedly connected between one side of the sliding plate (606) and one side of the connecting frame (607). The first buffer spring (609) is sleeved on the periphery of the first damping rod (608).

5. The electric wheelchair front wheel shock absorption suspension mechanism according to claim 4, characterized in that: The connecting frame (607) has a second connecting hole (610) on each of its two side plates. The connecting cylinder (601) has a second connecting shaft (611) fixedly connected to both sides of its outer wall. The second connecting shaft (611) is rotatably fitted in the second connecting hole (610). The connecting cylinder (601) is inclinedly arranged in the movable groove (7).

6. The front wheel shock absorption suspension mechanism for an electric wheelchair according to claim 5, characterized in that: A fixed plate (612) is fixedly connected to the upper side of the wheel mounting bracket (4), a connecting ring (613) is rotatably fitted to the outer wall of the connecting cylinder (601), a connecting rod (614) is fixedly connected to the upper side of the fixed plate (612) and slidably fitted to the inner wall of the connecting cylinder (601), and a second buffer spring (615) sleeved on the outside of the connecting rod (614) is fixedly connected between the fixed plate (612) and the connecting ring (613).

7. The electric wheelchair front wheel shock absorbing suspension mechanism according to claim 6, characterized in that: The inner wall of the connecting cylinder (601) is provided with an installation groove (616) at the top. A second damping rod (617) is fixedly installed on the top wall of the installation groove (616). A bearing (618) is provided between the end of the telescopic shaft of the second damping rod (617) and the end of the connecting rod (614). The end of the connecting rod (614) is fixedly connected to the outer ring of the bearing (618), and the end of the telescopic shaft of the second damping rod (617) is fixedly connected to the inner ring of the bearing (618).

8. The electric wheelchair front wheel shock absorbing suspension mechanism according to claim 7, characterized in that: The end of the second damping rod (617) telescopic shaft is fixedly connected with a limiting plate (620), and the inner wall of the connecting cylinder (601) is provided with a limiting groove (619) in sliding fit with the limiting plate (620).

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