Structure for realizing displacement of chair wheel shaft

Abstract

The utility model discloses a structure for realizing chair wheel axle displacement, which comprises a mounting plate, a slide rail, a slide block, a wrench, a guide rod and a chair wheel axle, the slide rail is fixed on a framework of a chair wheel chair body, the slide block is connected in the slide rail in a sliding manner, the mounting plate is supported on the upper end face of the slide rail, the guide rod penetrates through the mounting plate and is connected with the slide block, and the wrench is connected with the guide rod. The spanner is rotationally connected to the top end of the guide rod, an eccentric part is arranged on the spanner, the spanner is rotated to enable the eccentric part to abut against the mounting plate, the sliding block is lifted and is made to abut against the rail face of the sliding rail, a gear box or a bearing seat is fixed to the mounting plate, and the chair wheel shaft is connected with the gear box or the bearing seat. After the chair wheel and the chair wheel shaft are detached, the assembly locking of the chair wheel shaft on the chair body is released, and the chair wheel shaft can be retracted to the inner side of the outer contour of the chair body, so that the chair wheel shaft is prevented from protruding outside after the wheelchair is folded, and the wheelchair is not convenient to store. And after the chair wheel shaft retracts, the folded wheelchair surface is a'plane ', so that the wheelchair is convenient to store, and the chair wheel shaft cannot be damaged.

Description

Technical Field

[0001] The utility model relates to a structure for realizing the displacement of a chair wheel shaft. Background Art

[0002] When the existing folding wheelchair is in use, in order to facilitate the storage of the wheelchair or the maintenance of the wheels, the wheels are often made into a quick-release structure. After the wheels are removed and the chair body is folded, the wheel axle is still protruding outside the chair body because the wheel axle is immovable, which is inconvenient for the storage of the wheelchair and easy to damage the wheel axle. Summary of the invention

[0003] The utility model provides a structure for realizing the displacement of the chair wheel shaft in order to solve the problems existing in the prior art.

[0004] The technical solutions adopted in this utility model are:

[0005] A structure for realizing displacement of a chair wheel shaft comprises a mounting plate, a slide rail, a slider, a wrench, a guide rod and a chair wheel shaft, wherein the slide rail is fixed on the frame of a chair body, the slider is slidably connected in the slide rail, the mounting plate is supported on the upper end surface of the slide rail, the guide rod passes through the mounting plate and is connected to the slider, the wrench is rotatably connected to the top end of the guide rod, an eccentric portion is provided on the wrench, the wrench is rotated to make the eccentric portion contact the mounting plate, the slider is lifted and made to contact the track surface of the slide rail, a gear box or a bearing seat is fixed on the mounting plate, and the chair wheel shaft is connected to the gear box or the bearing seat.

[0006] Furthermore, a spring is sleeved on the guide rod, and the upper and lower ends of the spring respectively abut against the track surface of the slide rail and the slide block.

[0007] Furthermore, a guide piece is sleeved on the guide rod, the guide piece is placed above the mounting plate, an arc guide surface is provided on the guide piece, and the eccentric portion of the wrench rotates within the arc guide surface.

[0008] Furthermore, an inwardly recessed positioning groove is provided on the upper end surface of the slide rail, and the mounting plate is locked in the positioning groove.

[0009] The utility model has the following beneficial effects:

[0010] After the chair wheels are removed from the chair wheel shaft, the assembly lock of the chair wheel shaft on the chair body is released (i.e. the bearing seat or gear box moves on the chair body), and the chair wheel shaft can be retracted to the inside of the outer contour of the chair body. This can prevent the chair wheel shaft from protruding outside after the wheelchair is folded, making it inconvenient to store the wheelchair. After the chair wheel shaft is retracted, the folded wheelchair surface is a "flat surface", which is convenient for storage and will not damage the chair wheel shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1This is a schematic diagram of the chair wheel axle "protruding" from the chair body after the chair wheels are removed.

[0012] Figure 2 This is the installation structure diagram of the chair wheel shaft with adjustable axial position.

[0013] Figure 3 This is a cross-sectional view of the installation with adjustable axial position of the chair wheel shaft.

[0014] Figure 4 Diagram of the structure for setting the slide rails for each side of the chair frame.

[0015] Figure 5 Structural diagram for locking the slider.

[0016] Figure 6 This is a structural diagram of the guide sheet. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings.

[0018] like Figure 1 As shown, the utility model takes a foldable wheelchair as an example. The folding method of the foldable wheelchair is: the middle part of the wheelchair body 8 is used as the folding point, and the two supporting armrests are close to each other.

[0019] Combination Figure 2 The utility model includes a chair body 8, chair wheels 2 and a chair wheel shaft 1. The chair wheel shaft 1 is rotatably connected to the chair body 8. The chair wheels 2 are connected to the chair wheel shaft 1, and the two are a detachable structure. The axial position of the chair wheel shaft 1 on the chair body 8 in the utility model is adjustable. After the chair wheels 2 are removed from the chair wheel shaft 1, the chair wheel shaft 1 is axially adjusted so that the outer end surface of the chair wheel shaft 1 on each side is retracted to the inner side of the outer contour of the chair body 8. In this way, after the wheelchair is folded, the chair wheel shaft 1 is prevented from still protruding outside, which is inconvenient for the wheelchair to be stored. After the chair wheel shaft 1 is retracted, the folded wheelchair surface is a "flat surface" for easy storage.

[0020] The wheelchair in the utility model is an electric wheelchair or a manual wheelchair. When it is an electric wheelchair, a slidable gear box is provided on the frame of the chair body 8, a driving motor is fixed on the outer wall of the gear box, and the chair wheel shaft 1 is connected to the output end of the gear box.

[0021] In the case of a manual wheelchair, a slidable bearing seat is provided on the frame of the chair body 8, and the chair wheel shaft 1 is assembled with the bearing seat. The axial position adjustment of the chair wheel shaft 1 on the chair body 8 is achieved by sliding the gear box or the bearing seat.

[0022] The structure for achieving axial position adjustment of the chair wheel shaft 1 is further described below.

[0023] like Figures 3 to 5The position of the gear box or the bearing seat is adjusted on the chair body 8 through a sliding mechanism, and the sliding mechanism includes a mounting plate 80, a slide rail 81, a slider 82, a wrench 83 and a guide rod 84. The gear box or the bearing seat is fixed on the mounting plate 80, and two parallel slide rails 81 are fixed on the frame of the chair body 8 and below the armrests on each side. The two slide rails on each side are provided to make the installation of the gear box or the bearing seat more stable.

[0024] A slider 82 is slidably connected in each slide rail 81, and two mounting plates 80 are respectively supported on the upper end surfaces of the two slide rails 81 on the same side ( Figure 1 For the convenience of drawing, only one side of the sliding is drawn), the guide rod 84 passes through the mounting plate 80 and is connected to the slider 82, the wrench 83 is rotatably connected to the top of the guide rod 84, and an eccentric portion 831 is provided on the wrench 83. When the wrench is rotated, the slider 82 is lifted up and abuts against the track surface of the slide rail 81 under the action of the eccentric portion 831, thereby locking the slider 82 on the slide rail 81, thereby avoiding axial displacement of the chair wheel shaft 1 after the chair wheel 2 and the chair wheel shaft 1 are assembled.

[0025] In order to make the slider 82 return to its original position better, a spring 85 is sleeved on the guide rod 84. The upper and lower ends of the spring 85 respectively contact the track surface of the slide rail 81 and the slider 82. After the wrench 83 is locked, the spring 85 is in a compressed state. After the wrench is released, the spring 85 returns to its original position, and the slider 82 is more efficiently released. Due to the presence of the spring 85, the slider 82 will be lifted only when the wrench 83 is actively applied with an external force, thus making the sliding process of the slider smoother.

[0026] like Figure 6 A guide piece 86 is sleeved on the guide rod 84, and the guide piece 86 is placed above the mounting plate 80. A circular arc guide surface 861 is provided on the guide piece 86, and the eccentric portion 831 of the wrench rotates in the circular arc guide surface 861. The circular arc guide surface 861 fits the eccentric portion 831 of the wrench 83 better.

[0027] After the chair wheel 2 and the chair wheel shaft 1 are assembled, in order to make the wheelchair safer to use and further prevent the mounting plate 80 from axial displacement, an inwardly recessed positioning groove 811 is provided on the upper end surface of the slide rail 81. When the chair wheel 2 and the chair wheel shaft 1 are assembled, the mounting plate 80 is locked in the positioning groove 811. When the chair wheel shaft 1 needs to be retracted, the wrench 83 is loosened, the mounting plate 80 is slightly lifted upward to disengage it from the positioning groove 811, and then the mounting plate 80 is moved.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A structure for realizing the displacement of a chair wheel shaft, characterized in that: The invention comprises a mounting plate (80), a slide rail (81), a slider (82), a wrench (83), a guide rod (84) and a chair wheel shaft (1), wherein the slide rail (81) is fixed on the frame of the chair body, the slider (82) is slidably connected in the slide rail (81), the mounting plate (80) is supported on the upper end surface of the slide rail (81), the guide rod (84) passes through the mounting plate (80) and is connected to the slider (82), the wrench (83) is rotatably connected to the top end of the guide rod (84), an eccentric portion (831) is provided on the wrench (83), the wrench is rotated to make the eccentric portion (831) contact the mounting plate (80), the slider (82) is lifted and contacted with the track surface of the slide rail (81), a gear box or a bearing seat is fixed on the mounting plate (80), and the chair wheel shaft (1) is connected to the gear box or the bearing seat.

2. The structure for achieving chair wheel axle displacement according to claim 1, characterized in that: A spring (85) is sleeved on the guide rod (84), and the upper and lower ends of the spring (85) respectively contact the track surface of the slide rail (81) and the slide block (82).

3. The structure for achieving chair wheel axle displacement according to claim 1, characterized in that: A guide piece (86) is sleeved on the guide rod (84), the guide piece (86) is placed above the mounting plate (80), a circular arc guide surface (861) is provided on the guide piece (86), and the eccentric portion (831) of the wrench rotates within the circular arc guide surface (861).

4. The structure for achieving chair wheel axle displacement according to claim 1, characterized in that: An inwardly recessed positioning groove (811) is provided on the upper end surface of the slide rail (81), and the mounting plate (80) is locked in the positioning groove (811).

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