Lifting assembly and seat for a scooter

Abstract

The present application relates to a kind of lifting assembly and scooter seat.A kind of lifting assembly, including upper side fixed part and lower side fixed part, upper side fixed part and lower side fixed part are equipped with a plurality of first shear fork arm and a plurality of second shear fork arm, which constitute X shape, also be equipped with driver and swing piece, the driver has driving part and movable piece that can move in linear direction under the action of driving part, the driving part is hinged with one side of the front and rear two sides of lower side fixed part, the other side of the front and rear two sides of lower side fixed part is hinged with swing piece lower end, the swing piece upper end is rotationally fixed with the movable piece, the swing piece is equipped with arc-shaped guide slot, the first shear fork arm has linkage that extends laterally and is slidably fitted in the arc-shaped guide slot.The present application has the advantages of making the effective thrust of driver greater, making the effective thrust of driver stable and uniform, reducing the requirement of large thrust to driver, facilitating the lifting of shear fork type lifting assembly, and being suitable for high-load scooter.

Description

Technical Field

[0001] This invention relates to a lifting assembly and a seat for a mobility scooter. Background Technology

[0002] Chinese Patent Application No. 202020794240.4 discloses an adjustable seat and an electric wheelchair. The lifting assembly includes: a first horizontal rod rotatably connected to a first end of the seat cushion and a first end of a first connecting rod; a second connecting rod, the first end of which is rotatably connected to the first horizontal rod; a second end of which is rotatably connected to a base; a first longitudinal rod, the first end of which is fixedly connected to the first horizontal rod; a second longitudinal rod, the first end of which is sleeved on the first longitudinal rod, and the first longitudinal rod can slide within the second longitudinal rod; a second water... A horizontal bar is located behind the first horizontal bar, and the second horizontal bar is fixedly connected to the second end of the second longitudinal bar; a third connecting rod is rotatably connected to the second horizontal bar at its first end and to the second connecting rod at its middle part; a third horizontal bar is located below the first horizontal bar and is rotatably connected to the second end of the third connecting rod; a third longitudinal bar is slidably connected to the base at its first end and the other end; a support platform is fixedly connected to the first horizontal bar at its upper end and to the first driving member at its lower end.

[0003] The second connecting rod, the third connecting rod, the first longitudinal rod, the second longitudinal rod, and the third longitudinal rod are each provided in two sets, forming two sets of scissor arm mechanisms. The two sets of scissor arm mechanisms are respectively connected to the first horizontal rod, the second horizontal rod, the third horizontal rod, and the base. At the same time, the use of two sets of scissor arm mechanisms can improve the overall stability, thereby achieving stable ascent or descent during the adjustment process and ensuring the safety of the passenger.

[0004] In the above scheme, a telescopic push rod is used as a driving component to realize the lifting and lowering of the scissor arm mechanism. One end of the telescopic push rod is rotatably connected to the support platform, and the other end of the telescopic push rod is rotatably connected to the first connecting rod. The lifting and lowering of the scissor arm mechanism is realized by the extension and retraction of the telescopic push rod. The torque applied by the telescopic push rod to the scissor arm mechanism is relatively small. If the load is large, the lifting component will have difficulty rising, resulting in poor performance. Summary of the Invention

[0005] The purpose of this invention is to provide a lifting assembly with a more labor-saving structure and lower thrust requirements for the drive.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a lifting assembly, comprising an upper fixed part and a lower fixed part arranged opposite to each other, wherein a plurality of first scissor arms and a plurality of second scissor arms forming an X shape are provided between the upper fixed part and the lower fixed part, wherein the upper end of the first scissor arm slides in cooperation with the upper fixed part in the front-back direction, and the lower end of the first scissor arm is hinged to the lower fixed part, wherein the lower end of the second scissor arm slides in cooperation with the lower fixed part in the front-back direction, and the lower end of the second scissor arm is hinged to the upper fixed part, wherein a driver and a swing member are further provided between the upper fixed part and the lower fixed part, wherein the driver has a driving part and a movable part that can move in a straight line under the action of the driving part, wherein the driving part is hinged to one side of the front and rear sides of the lower fixed part, and the other side of the front and rear sides of the lower fixed part is hinged to the lower end of the swing member, wherein the upper end of the swing member is rotatably fixed to the movable part, wherein the swing member is provided with an arc-shaped guide groove, and the first scissor arm has a linkage member that extends laterally and slides in the arc-shaped guide groove.

[0007] The thrust point of the actuator in this invention is relatively high, ensuring a maximized initial angle during the lifting assembly's ascent, thus maximizing the effective thrust. Under the actuator's action, the swinging component rotates, while the actuator swings at a corresponding angle, gradually increasing until the upper end of the swinging component is directly above the lower end, at which point the angle decreases again to achieve balance at both ends, ensuring a smooth and uniform effective thrust. Under the actuator's action, the radius of rotation at the connection between the swinging component and the moving component remains unchanged, while the linkage rotates around different centers under the actuator's influence. There is a lever arm relationship between the swinging component and the linkage (forming a force-saving structure). As the swinging component rotates, the lever arm of the linkage gradually increases. Based on the lever principle, the force output is force-saving. Following the principle of a scissor-lift assembly, the initial force required is the greatest, decreasing as the lifting assembly rises. This neutralization reduces and averages the starting torque, decreasing the high thrust requirement on the actuator. The actuator can be any existing linear actuator, such as an electric actuator.

[0008] Preferably, the linkage includes a fixing pin fixed to the first scissor arm and a rolling bearing fixed to the fixing pin. The linkage, consisting of the fixing pin and the rolling bearing, reduces the possibility of damage under greater forces, thus extending its service life.

[0009] Preferably, two first scissor arms and two second scissor arms are provided between the upper and lower fixing parts. The swing member has a clearance groove that extends through the front and back and opens upwards at its lower end. The driver passes through the clearance groove. Both the left and right parts of the swing member have an arc-shaped guide groove, and both first scissor arms have the linkage member. This arrangement makes the swing member structure more stable and prevents the swing angles of the two arc-shaped guide grooves from being inconsistent.

[0010] Preferably, the drive unit of the actuator is connected to a guide unit, which has a guide groove extending in a straight line and penetrating upwards. The movable member slides within the guide groove, and its upper end extends above the guide unit and is rotatably fixed to the upper end of the swing member. This arrangement allows the thrust point of the actuator to be higher, further ensuring a maximized initial angle and maximizing the effective thrust of the actuator.

[0011] Preferably, the guide groove extends vertically through the guide portion. The movable component has an upper connecting portion extending above the guide groove and a lower connecting portion extending below the guide groove. At least one pair of rolling elements are rotatably fixed to both the upper and lower connecting portions. The guide groove is located between each pair of rolling elements, and the outer edge of the rolling element's cross-section is circular and contacts the outer wall of the guide portion. By providing rolling elements, the stability of the movable component is ensured, preventing it from wobbling and guaranteeing effective force application.

[0012] Preferably, the movable component has a pair of rolling elements on its upper side and two pairs of rolling elements on its lower side, with the two pairs of rolling elements spaced apart. Each of the left and right sides has three rolling elements to form a stable structure, ensuring stability while minimizing the number of rolling elements.

[0013] Preferably, the movable component has a transverse through hole at its upper end, a sliding sleeve is provided inside the through hole, and a linkage shaft is tightly fitted inside the sliding sleeve. The upper end of the swing component has a mating hole for the linkage shaft to pass through. By providing the sliding sleeve, radial movement of the linkage shaft is prevented, thereby ensuring the movement stability of the swing component.

[0014] The present invention also discloses a seat for a mobility scooter having the above-mentioned lifting assembly, wherein the lower fixing part is fixed to the vehicle body and the upper fixing part is fixed to the seat.

[0015] This invention has the advantages of maximizing the effective thrust of the drive, making the effective thrust of the drive smooth and uniform, and reducing the high thrust requirement of the drive, so as to facilitate the lifting of the scissor lift assembly and making it suitable for high-load mobility vehicles. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention, showing the first and second scissor arms on the left side hidden in the folded state.

[0017] Figure 2 This is a schematic diagram of the structure of the present invention in the rising state, where the first and second scissor arms on the left are hidden.

[0018] Figure 3 This is a schematic diagram of the structure of the present invention, which hides the first and second scissor arms on the left side when fully raised.

[0019] Figure 4 This is a perspective view of the fully ascended state of the present invention.

[0020] Figure 5 This is a schematic diagram of one structure of the driver of the present invention.

[0021] Figure 6 This diagram illustrates the variation in the thrust required by the electric actuator during the ascent of an existing scissor lift assembly.

[0022] Figure 7 This diagram shows the change in the thrust required by the driver of the present invention when the lifting assembly of the present invention is raised. Detailed Implementation

[0023] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0024] Depend on Figures 1 to 4 As shown in the figure, this embodiment discloses a lifting assembly for a mobility scooter seat, including two fixing parts 1, which are arranged vertically opposite each other and include an upper fixing part and a lower fixing part. The lower fixing part is used to fix to the mobility scooter body (not shown in the figure), and the upper fixing part is used to fix to the seat (not shown in the figure). A first scissor arm 2 and a second scissor arm 3 are provided between the upper fixing part and the lower fixing part. The middle part of each first scissor arm 2 is hinged to the middle part of a second scissor arm 3 to form an X shape. The two first scissor arms 2 and the two second scissor arms 3 constitute a scissor-type lifting structure. The upper end of the first scissor arm 2 slides in the front-back direction with the upper fixing part, and the lower end of the first scissor arm 2 is hinged to the lower fixing part. The lower end of the second scissor arm 3 slides in the front-back direction with the lower fixing part, and the lower end of the second scissor arm 3 is hinged to the upper fixing part. In this embodiment, a frame 11 is provided at the front side of both the lower and upper fixing parts. Slide grooves 111 extending in the front-back direction are formed on both the left and right sides of the frame 11. The upper end of the first scissor arm 2 slides within the slide groove 111 of the upper frame, and the lower end of the second scissor arm 3 slides within the slide groove of the lower frame. In this embodiment, the first scissor arm 2 and the second scissor arm 3 can adopt any existing scissor-type lifting assembly fixing structure.

[0025] Depend on Figures 2 to 5As shown, a driver 4 and a swing member 5 are provided between the upper and lower fixed parts. The driver 4 has a driving part 40 and a movable part 40 that can move in a straight line under the action of the driving part 40. The driving part 40 is hinged to the frame 11 at the front of the lower fixed part, and the rear of the lower fixed part is hinged to the lower end of the swing member 5. The upper end of the swing member 5 is rotatably fixed to the movable part 40. The swing member 5 is provided with an arc-shaped guide groove 51. The first scissor arm 2 has a linkage member that extends laterally and slides in the arc-shaped guide groove 51. The linkage member includes a fixing pin 21 fixed to the first scissor arm 2 and a rolling bearing 22 fixed on the fixing pin 21. In this embodiment, the rolling bearing 22 is a needle roller bearing. The swing member 5 has a relief groove (not shown in the figure) that runs through the front and back and opens upward at the lower end. The driver 4 passes through the relief groove. Both the left and right parts of the swing member 5 have an arc-shaped guide groove 51. Both first scissor arms 2 have linkage members.

[0026] In this embodiment, the driver 4 is an electric push rod, the drive unit 40 is a motor, and the movable member 40 is a component that is linked with the lead screw nut of the electric push rod. The drive unit 41 of the driver 4 is connected to a guide unit 42. The guide unit 42 has a guide groove 421 that extends in a straight line and passes through vertically. The movable member 40 is slidably fitted in the guide groove 421, and the upper end of the movable member 40 extends above the guide unit 42 and is rotatably fixed to the upper end of the swing member 5. The upper end of the movable member 40 has a transverse through hole 401, and a sliding sleeve (not shown in the figure) is provided in the through hole 401. A linkage shaft 402 is tightly fitted in the sliding sleeve. The upper end of the swing member 5 has a mating hole for the linkage shaft 402 to pass through, and retaining rings 403 are provided at both ends of the linkage shaft 402 to prevent the linkage shaft 402 from disengaging from the swing member 5.

[0027] Depend on Figure 5 As shown, the movable part 40 has an upper connecting part 404 extending above the guide part 42 and a lower connecting part 405 extending below the guide part. A pair of rolling elements 406 are rotatably fixed on the upper connecting part 404, and two pairs of rolling elements 406 are rotatably fixed on the lower connecting part 405. The outer edge of the cross-section of the rolling elements 406 is circular and contacts the outer wall of the guide part 42. The two rolling elements at the upper connecting part 404 are arranged opposite each other from left to right, and the two pairs of rolling elements at the lower connecting part 405 are arranged opposite each other from front to back, with each pair of rolling elements spaced apart from left to right. The rolling elements 406 can be bearings, plastic sleeves, or copper sleeves.

[0028] Depend on Figure 1 , Figure 2 and Figure 3As shown, the thrust point of the actuator of this invention is relatively high, ensuring a maximized initial angle when the lifting assembly rises, thus maximizing its effective thrust. Under the action of the actuator, the swinging component rotates, and the actuator swings at a corresponding angle, gradually increasing in angle. Once the upper end of the swinging component is directly above the lower end, the angle decreases again, achieving balance at both ends and making the effective thrust smooth and uniform. Under the action of the actuator, the radius of rotation at the connection between the swinging component and the moving component remains unchanged. The linkage component rotates with different centers under the influence of the actuator. There is a lever relationship between the swinging component and the linkage component (forming a force-saving structure). As the swinging component rotates, the lever arm of the linkage component gradually increases. From the lever principle, the force output is force-saving. From the principle of the scissor lift assembly, the initial force required is the greatest, and the force required decreases as it pushes upwards. This neutralizes each other to reduce the starting torque, making it more even and reducing the large thrust requirement of the actuator.

[0029] Depend on Figure 6 and Figure 7 As shown, Figure 7 The change in thrust and angle (slope) is relatively Figure 6 The thrust and angle changes (slope) are much gentler. This invention adds a force-saving structure composed of a linkage, a swinging component and a moving component, which greatly reduces the value of the initial thrust. At the same time, it increases the output of the lever arm within a limited space, and as a whole, it reduces the maximum thrust and smooths the required input power.

[0030] This invention has the advantages of maximizing the effective thrust of the drive, making the effective thrust of the drive smooth and uniform, and reducing the high thrust requirement of the drive, so as to facilitate the lifting of the scissor lift assembly and making it suitable for high-load mobility vehicles.

Claims

1. A lifting assembly, comprising an upper fixed portion and a lower fixed portion disposed opposite to each other, wherein a plurality of first scissor arms and a plurality of second scissor arms forming an X shape are provided between the upper fixed portion and the lower fixed portion, wherein the upper ends of the first scissor arms slide in engagement with the upper fixed portion along the front-back direction, and the lower ends of the first scissor arms are hinged to the lower fixed portion; the lower ends of the second scissor arms slide in engagement with the lower fixed portion along the front-back direction, and the lower ends of the second scissor arms are hinged to the upper fixed portion, characterized in that: A driver and a swing member are also provided between the upper and lower fixed parts. The driver has a driving part and a movable part that can move in a straight line under the action of the driving part. The driving part is hinged to one side of the front and rear sides of the lower fixed part, and the other side of the front and rear sides of the lower fixed part is hinged to the lower end of the swing member. The upper end of the swing member is rotatably fixed to the movable part. The swing member is provided with an arc-shaped guide groove. The first scissor arm has a linkage that extends laterally and slides within the arc-shaped guide groove. Two first scissor arms and two second scissor arms are provided between the upper and lower fixed parts. The swing member has a clearance groove that extends through the front and rear and opens upward at the lower end. The driver passes through the clearance groove. Both the left and right parts of the swing member have an arc-shaped guide groove. Both first scissor arms have a clearance groove. The linkage component is described above; the driving part of the driver is connected to the guide part, the guide part is provided with a guide groove extending in a straight direction and penetrating upward, the movable part is slidably fitted in the guide groove, the upper end of the movable part extends above the guide part and is rotatably fixed to the upper end of the swinging part; the guide groove penetrates the guide part vertically, the movable part has an upper connecting part extending above the guide groove and a lower connecting part extending below the guide groove, both the upper connecting part and the lower connecting part are rotatably fixed with at least one pair of rolling elements, the guide groove is located between each pair of rolling elements, the outer edge of the cross section of the rolling element is circular and contacts the outer wall of the guide part; the upper end of the movable part has a transversely penetrating through hole, the through hole is provided with a sliding sleeve, the sliding sleeve is tightly fitted with a linkage shaft, and the upper end of the swinging part is provided with a mating hole for the linkage shaft to pass through.

2. The lifting assembly according to claim 1, characterized in that: The linkage includes a fixing pin fixed to the first scissor arm and a rolling bearing fixed to the fixing pin.

3. The lifting assembly according to claim 1, characterized in that: The upper side of the movable part is provided with a pair of rolling elements, and the lower side of the movable part is provided with two pairs of rolling elements, with the two pairs of rolling elements spaced apart.

4. A vehicle seat having a lifting assembly as described in any one of claims 1 to 3, characterized in that: The lower fixing part is fixed to the vehicle body, and the upper fixing part is fixed to the seat.

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