Auxiliary wheel set and wheelchair stair climbing vehicle

Abstract

The present invention discloses an auxiliary wheel set, which includes two groups of inner wheels and outer wheels, each group of inner wheels and outer wheels is respectively installed on the inner side and outer side of each track of a rubber crawler chassis, the outer wheel is connected to the frame of the rubber crawler chassis through an outer wheel axle, the inner wheel is connected to one end of a swing rod, an inner wheel axle is arranged in the middle of the swing rod, and is slidably connected to the frame of the rubber crawler chassis through the inner wheel axle, the other end of the swing rod is connected to one end of a spring, and the other end of the spring is connected to a fixed column fixed to the frame of the rubber crawler chassis. Correspondingly, the present application also provides a wheelchair stair climbing vehicle. When in use, both the inner wheel and the outer wheel set can be adjusted to a certain extent according to the flatness of the ground, so that the wheels fit the ground for guidance.

Description

Technical Field

[0001] The present invention relates to the technical field of wheelchair auxiliary equipment, and in particular to an auxiliary wheel set and a wheelchair stair climbing vehicle. Background Art

[0002] Auxiliary wheel sets are usually set on various movable devices. A wheelchair stair climbing vehicle is a device that can carry a wheelchair to walk up stairs. When walking on the ground, the auxiliary wheel sets are used to assist balance. The present application provides an auxiliary wheel set and a wheelchair stair climbing vehicle. Summary of the invention

[0003] The purpose of the present application is to provide an auxiliary wheel set and a wheelchair stair climbing vehicle.

[0004] To achieve the purpose of the present invention, the present invention provides an auxiliary wheel group, which includes two groups of inner wheels and outer wheels, each group of inner wheels and outer wheels are respectively installed on the inner side and outer side of each track of the rubber track chassis, the outer wheel is connected to the frame of the rubber track chassis through an outer wheel axle, the inner wheel is connected to one end of a swing rod, an inner wheel axle is arranged in the middle of the swing rod, and is slidably connected to the frame of the rubber track chassis through the inner wheel axle, the other end of the swing rod is connected to one end of a spring, and the other end of the spring is connected to a fixing column fixed on the frame of the rubber track chassis.

[0005] Wherein, a torsion spring is sleeved on the outer wheel axle, one end of the torsion spring is connected to the outer wheel axle, and the other end is connected to the frame of the rubber crawler chassis vehicle.

[0006] Correspondingly, the present application also provides a wheelchair stair climbing vehicle, including a rubber track chassis vehicle, the rubber track chassis vehicle including a rubber track chassis vehicle frame and two tracks arranged on both sides of the rubber track chassis vehicle frame, and also including the auxiliary wheel set as mentioned above.

[0007] Compared with the prior art, the beneficial effect of the present invention is that, when in use, both the inner wheel and the outer wheel set can be adjusted to a certain extent according to the flatness of the ground, so that the wheels fit the ground for guidance. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 The figure shows the structure schematic diagram of the auxiliary wheel set of the present application;

[0009] Figure 1 In the figure, 501-inner wheel, 502-outer wheel, 503-fixed column.

[0010] Figure 2 The first schematic diagram of the structure of the wheelchair stair climbing vehicle of the present application is shown;

[0011] Figure 3 The second schematic diagram of the structure of the wheelchair stair climbing vehicle of the present application is shown;

[0012] Figure 4 Shown is a schematic diagram of the structure of the parking rack of this application;

[0013] Figure 2-4 In the middle, 131-upper connecting block, 132-first hinge shaft, 133-bending frame, 134-first connecting rod, 135-second connecting rod, 136-U-shaped frame, 137-side sliding plate, 138-second hinge shaft, 139-first spring, 1310-third connecting rod, 1-head pad, 2-support rod, 3-lateral limit frame, 4-upper guide wheel, 5-rubber crawler chassis frame, 6-rubber crawler chassis track, 7-inner wheel, 8-fixing rod, 9-locking rod, 10-binding strap, 11-handrail, 12-porous block.

[0014] Figure 5 The figure shows the structure diagram of the transverse limit frame of the present application;

[0015] Figure 6 The figure shows the structure schematic diagram of the limit pull rod of the present application;

[0016] Figure 5-6 In the middle, 32-longitudinal sleeve block, 33-transverse rod, 34-upper block, 35-limit pull rod, 36-limit end cap, 37-L-shaped block, 38-rotating shaft, 39-transverse sliding block, 310-locking bolt, 311-upper end pull ball, 312-pull rod block, 313-spring, 314-fixing ring, 315-pull rod body.

[0017] Figure 7 Shown is a schematic structural diagram of the foldable support rod of the present application;

[0018] Figure 8 Shown is a schematic diagram of the structure of the locking mechanism of the present application;

[0019] Figure 7-8 Among them, 101-hinge shaft, 102-spring, 103-locking block, 104-telescopic frame, 105-protective shell, 106-connecting rod. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, parts or modules, components and / or their combinations.

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0023] Example

[0024] like Figure 1 As shown, the auxiliary wheel set provided by the present invention comprises two groups of inner wheels 501 and outer wheels 502, each group of inner wheels 501 and outer wheels 502 are respectively installed on the inner side and outer side of each track of the rubber crawler chassis, the outer wheels 502 are connected to the frame of the rubber crawler chassis through the outer wheel 502 shaft, the inner wheels 501 are connected to one end of the swing rod, the inner wheel 501 shaft is arranged in the middle of the swing rod, and the inner wheel 501 shaft is slidably connected to the frame of the rubber crawler chassis through the inner wheel 501 shaft, and the other end of the swing rod is connected to one end of the spring, and the other end of the spring is connected to the fixed column 503 fixed on the frame of the rubber crawler chassis. Among them, the outer wheel 502 shaft is sleeved with a torsion spring, one end of the torsion spring is connected to the outer wheel 502 shaft, and the other end is connected to the frame of the rubber crawler chassis. When in use, the inner wheel and the outer wheel 502 group can be adjusted to a certain extent according to the flatness of the ground, so that the wheels fit the ground for guidance.

[0025] Accordingly, if Figure 2-Figure 4 As shown, the present application also provides a wheelchair stair climbing vehicle, including a rubber track chassis vehicle, the rubber track chassis vehicle including a rubber track chassis vehicle frame and two tracks arranged on both sides of the rubber track chassis vehicle frame, and also includes the auxiliary wheel set as mentioned above.

[0026] The vehicle also includes a support rod 2 arranged on the rubber crawler chassis, a fixing rod 8 is respectively arranged on both sides of the lower end of the support rod 2, and a parking frame as described above is arranged on the rubber crawler chassis, the parking frame includes a side sliding plate 137 arranged at intervals on the left and right, the side sliding plate 137 is provided with a long sliding hole, the inner end of each side sliding plate 137 is respectively hingedly connected to the rubber crawler chassis frame 5 through a second hinge shaft 138, the outer ends of the two side sliding plates 137 are connected through a second connecting rod 135, and a U-shaped frame 136 is connected to the second connecting rod 135, and the U-shaped frame 136 is inclined; the inner ends of the two side sliding plates 137 are also connected through a fourth hinge shaft 138. The rubber crawler chassis frame 5 is connected by a connecting rod, a third connecting rod 1310 is horizontally arranged on the rubber crawler chassis frame 5 above the fourth connecting rod, and the fourth connecting rod and the third connecting rod 1310 are connected by a first spring; the sliding long hole of each side sliding plate 137 is slidably connected to a bending frame 133 through a pin shaft, and the lower parts of the two bending frames 133 are connected by a first connecting rod 134, and the upper end of each bending frame 133 is hingedly connected to the rubber crawler chassis frame 5 through a first hinge shaft 132, and an upper connecting block 131 is arranged on the rubber crawler chassis frame 5 above the middle of the upper ends of the two bending frames 133, and the upper connecting block 131 is connected to the first connecting rod 134 through a spring.

[0027] When it is not in working state, the U-shaped frame 136 is pressed downward, thereby driving the side sliding plate 137 to rotate around the second hinge shaft 138. At the same time, the pin shaft at the lower end of the bending frame 133 slides toward the side of the U-shaped frame 136 in the sliding long hole of the side sliding plate 137 until the bending frame 133 supports the side sliding plate 137, so that the side sliding plate and the bending frame 133 become a stable supporting structure, thereby bringing about the parking effect; when it is needed, the bending frame 133 is pushed inward, and under the action of the spring and the first spring 139, the outer side of the side sliding plate 137 is lifted up under the drive of the bending frame 133, which is simple to operate and has a good effect.

[0028] In addition, the rubber crawler chassis track 6 at the right end of the rubber crawler chassis is arranged in an upward inclined plane, and the upper end of the rubber crawler chassis frame 5 is connected to a support rod 2 arranged obliquely, and a fixing rod 8 is arranged on both sides of the lower end of the support rod 2. In addition, a handrail 11 is arranged on the upper end of the support rod 2. In addition, a head pad 1 and a lateral limit frame 3 are arranged on the upper end of the support rod 2.

[0029] When in use, the wheelchair is fixed on the wheelchair stair climbing vehicle through the lateral limit frame 3 and the fixing rod 8. The driving device inside the rubber track chassis drives the rubber track to rotate and move. When climbing stairs, the track is in the form of an inclined side in front. Utilizing this structure, the wheelchair can climb stairs, which is convenient and practical.

[0030] like Figure 5-6 As shown, a fixed rod is respectively arranged on both sides of the lower end of the support rod of the present application, and a lateral limit frame as described above is slidably sleeved on the support rod. The lateral limit frame comprises a longitudinal sleeve block, which is sleeved on the wheelchair stair climbing vehicle and slidably connected, and the structures at both ends of the longitudinal sleeve block are symmetrically arranged, and are both connected to a transversely arranged transverse rod, and a transverse sliding block is sleeved on the transverse rod and slidably connected, an upper block is arranged on the inner side of the upper end of the transverse sliding block, and a rotating shaft is arranged on the outer side of the lower end of the transverse sliding block, and an L-shaped block is hingedly connected on the rotating shaft, and a limiting pull rod is arranged at the front end of the transverse sliding block, and the L-shaped block is swung and limited by the limiting pull rod, and the wheelchair is limited by the upper block and the L-shaped block.

[0031] The upper end of the upper stopper is bent outward. The transverse limit frame is provided with a locking rod at the lower side of the rear end of the longitudinal sleeve block, and a porous block is provided on the wheelchair stair climbing vehicle at the corresponding position, and a plurality of sockets are provided on the porous block at intervals up and down, and the rod body of the locking rod is inserted into the socket to achieve locking of the transverse limit frame. The structure of the locking rod is consistent with that of the limit pull rod, and the rod body of the locking rod is inserted into the sockets of the porous blocks at different heights to achieve fixation of the two, thereby achieving fixation of the transverse limit frame. The limit pull rod includes an upper pull ball, and the lower end of the upper pull ball is connected to a pull rod body, the pull rod body passes through the pull rod block and is slidably connected, the interior of the pull rod block is a cavity, and the pull rod body located in the cavity is provided with a fixing ring, and a spring is provided on the pull rod body at the upper end of the fixing ring.

[0032] When in use, pull the rod body to move it upwards, the L-shaped stopper swings to the left side of the limit rod, loosen the rod body to prevent it from rotating to the right side of the limit rod, and clamp the armrest of the wheelchair between the upper stopper and the L-shaped stopper. The transverse sliding block can be adjusted left and right, and is fixed to the transverse rod by fastening bolts. It has a simple structure and is easy to operate.

[0033] like Figure 7-8 As shown,

[0034] like Figure 1-Figure 4As shown, the support rod is a foldable support rod, and the two sides of the lower left end of the support rod are respectively hingedly connected to the hinge ears on the rubber track vehicle frame through a hinge shaft, and the lower right end is locked and opened with the rubber track vehicle through a locking mechanism; the locking mechanism includes a telescopic frame 104 and a locking block 103, and the telescopic frame includes two U-shaped frames with the same structure, the two U-shaped frames are respectively arranged in a U-shaped cavity, and the upper end rods of the two U-shaped frames are connected by a connecting rod 106, and the inner end of each U-shaped frame is connected to the wall of the U-shaped cavity by two springs 102 arranged at intervals up and down, and the ends of the lower end rods of the two U-shaped frames are inclined surfaces; the locking block 103 is arranged on the rubber track vehicle frame 5, and two fixing holes are arranged thereon, and the two fixing holes are respectively used in conjunction with one end of the inclined surface of the two U-shaped frames, and one end of the inclined surface can be inserted into or pulled out of the fixing hole.

[0035] When folding is required, the telescopic frame 104 is pushed inwardly so that the inclined end of the outer lower end rod of the U-shaped frame is pulled out from the locking block 103, so that the support rod 2 can drive the hinge shaft 1 to rotate, and horizontal folding and placement are achieved, occupying a small space and being convenient for storage; when opening, when the inclined end of the outer lower end rod of the U-shaped frame touches the locking block 103, it automatically retracts, and when it slides to the position of the fixing hole, it is automatically inserted into the fixing hole under the elastic force of the spring 102 to achieve locking.

[0036] In addition, in order to avoid misoperation, the telescopic frame 104 is pressed. An L-shaped protective shell 105 is covered on the telescopic frame 104. The telescopic frame 104 cannot be pressed without opening the protective shell 105.

[0037] The upper end of the telescopic frame 104 is hingedly connected with an L-shaped protective shell 105. After the L-shaped protective shell 105 is lowered, the right end of the L-shaped protective shell 105 covers the upper ends of the two U-shaped rod frames.

[0038] Where the present application does not describe in detail, the prior art applies.

[0039] The above is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A wheelchair stair climbing vehicle, It is characterized in that The rubber crawler chassis comprises a rubber crawler chassis frame and two crawlers arranged on both sides of the rubber crawler chassis frame, and also comprises an auxiliary wheel set; The auxiliary wheel set includes two sets of inner wheels and outer wheels, each set of inner wheels and outer wheels is respectively installed on the inner side and outer side of each track of the rubber crawler chassis, the outer wheel is connected to the frame of the rubber crawler chassis through the outer wheel shaft, the inner wheel is connected to one end of the swing rod, the inner wheel shaft is arranged in the middle of the swing rod, and is slidably connected to the frame of the rubber crawler chassis through the inner wheel shaft, the other end of the swing rod is connected to one end of the spring, and the other end of the spring is connected to a fixing column fixed to the frame of the rubber crawler chassis; The cam is connected to the frame of the rubber crawler chassis by a second hinge shaft, and the outer ends of the two side sliding plates are connected by a second connecting rod, and a U-shaped frame is connected to the second connecting rod, and the U-shaped frame is inclined; the inner ends of the two side sliding plates are also connected by a fourth connecting rod, and a third connecting rod is transversely arranged on the rubber crawler chassis frame above the fourth connecting rod, and the fourth connecting rod and the third connecting rod are connected by a first spring; the sliding long hole of each side sliding plate is slidably connected to a bending frame through a pin shaft, the lower parts of the two bending frames are connected by the first connecting rod, and the upper end of each bending frame is hingedly connected to the rubber crawler chassis frame by a first hinge shaft, and an upper connecting block is arranged on the rubber crawler chassis frame above the middle of the upper ends of the two bending frames, and the upper connecting block is connected to the first connecting rod through a spring; When it is not in working state, the U-shaped frame is pressed downward, thereby driving the side sliding plate to rotate around the second hinge axis. At the same time, the pin shaft at the lower end of the bending frame slides toward one side of the U-shaped frame in the sliding long hole of the side sliding plate, so that the side sliding plate and the bending frame become a stable supporting structure; when it is needed, the bending frame is pushed inward, and under the action of the spring and the first spring, the outer side of the side sliding plate is lifted up under the drive of the bending frame.

2. A wheelchair stair climbing vehicle according to claim 1, It is characterized in that A torsion spring is sleeved on the outer wheel shaft, one end of the torsion spring is connected to the outer wheel shaft, and the other end is connected to the frame of the rubber crawler chassis vehicle.

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