Front wheel structure and wheelchair

Abstract

A front wheel structure comprises a front wheel and a front fork, one end of the front fork is connected with the front wheel, the other end of the front fork is connected with a wheelchair through a front fork arm, the front fork is connected with the front fork arm through a multi-dimensional adjusting mechanism, and the multi-dimensional adjusting mechanism is configured to be capable of adjusting the front-back swing angle and the left-right rotation angle of the front fork. According to the scheme, the first tooth surface structure on the bottom side of the first connecting block is meshed with the second tooth surface structure on the top side of the second connecting block, so that the front fork with the swing angle adjusted is fixedly supported, and the problem that the front fork slips due to sliding of the connecting position is solved; besides, the rotating angle of the first connecting piece is controlled through the adjusting bolt, the advancing direction of the front wheel can be adjusted, and the situation that the front wheel deviates leftwards and rightwards in the advancing process is avoided; through the adjustment, the connecting shaft can be kept perpendicular to the horizontal plane all the time, the situation of guiding deviation of the front wheel is avoided, and the use stability and safety of the front wheel are guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wheelchair technical field, especially a front wheel structure and wheelchair. BACKGROUND

[0002] At present, the front wheel structure of the prior art wheelchair can rotate randomly relative to the axis perpendicular to the horizontal plane, realizing the change of the forward direction of the wheelchair, but generally cannot swing around the axis parallel to the horizontal plane. After the front wheel is adjusted to be inclined by other adjusting mechanism, the axis perpendicular to the horizontal plane of the front wheel before and after lifting will be offset, and adjustment is needed to avoid vibration or shaking of the front wheel during driving. Based on this, a Chinese utility model patent proposes a front fork bearing horizontal adjusting structure (CN 208710303 U) of a wheelchair, which comprises a front wheel and a front fork. One end of the front fork is connected with the front wheel, and the other end is connected with the wheelchair through a front fork arm. The other end of the front fork arm is provided with a round sleeve. A first tension block and a second tension block fixed axially or rotating axially relative to the round sleeve, and an adjusting bolt are installed in the round sleeve. An arc-shaped adjusting groove is opened at the bottom of the round sleeve along the arc contour. The first tension block and the second tension block are connected with a connecting shaft extending out of the arc-shaped adjusting groove. The other end of the connecting shaft swings along the arc-shaped adjusting groove with the front fork through the connecting shaft, realizing the adjustment of the front wheel.

[0003] However, the above structure has three problems, (1) the structure is complex and inconvenient to operate; (2) the swing angle is difficult to fix; (3) the front wheel is prone to left and right deviation and difficult to control.

[0004] Therefore, in view of the deficiencies of the prior art, it is necessary to design a front wheel structure and wheelchair to solve the above problems. INVENTION CONTENTS

[0005] In order to overcome the deficiencies of the prior art, the utility model aims to provide a front wheel structure and wheelchair.

[0006] In order to achieve the above purpose and other related purposes, the technical scheme provided by the utility model is: a front wheel structure, comprising a front wheel and a front fork. One end of the front fork is connected with the front wheel, and the other end is connected with the wheelchair through a front fork arm. The front fork and the front fork arm are connected through a multi-dimensional adjusting mechanism. The multi-dimensional adjusting mechanism is configured to adjust the front and rear swing angle and the left and right rotation angle of the front fork.

[0007] The preferred technical scheme is that the multi-dimensional adjusting mechanism is composed of a sleeve, a connecting shaft, a pin shaft, a connecting piece one and a connecting piece two, the sleeve is formed on the front fork arm, the connecting piece one is arranged at the bottom end of the sleeve, the connecting piece one is provided with a guide hole, the top end of the connecting shaft extends into the sleeve through the guide hole, the top end of the connecting shaft is provided with a swing hole, the pin shaft is inserted into the sleeve and passes through the swing hole, the bottom end of the connecting shaft is rotationally connected with the front fork, the connecting piece two is sleeved on the connecting shaft, the bottom side of the connecting piece one is provided with an arc-shaped tooth surface one, the top side of the connecting piece two is provided with an arc-shaped tooth surface two, the arc-shaped tooth surface one and the arc-shaped tooth surface two are arranged in meshing mode and are configured to support and fix the front and back swing angle of the connecting shaft.

[0008] The preferred technical scheme is that the guide hole adopts a waist-shaped hole, and the guide hole is arranged along the front and back directions.

[0009] The preferred technical scheme is that the swing hole adopts a waist-shaped hole, and the swing hole is arranged along the axial direction of the connecting shaft.

[0010] The preferred technical scheme is that the part of the connecting piece one extending into the sleeve is formed with an adjusting lug, the adjusting lug is provided with a screw hole, the sleeve wall is provided with a strip-shaped adjusting window arranged along the circumferential direction, and the adjusting screw is screwed into the screw hole through the adjusting window and is configured to adjust the left and right rotation angle of the connecting piece one.

[0011] The preferred technical scheme is that the top end of the sleeve is provided with a sealing cover, and the sealing cover and the sleeve are sealingly connected through a sealing ring.

[0012] The preferred technical scheme is that the top end of the front fork is provided with an embedding groove, the embedding groove is provided with a bearing, the outer ring of the bearing is fixedly connected with the embedding groove, and the inner ring of the bearing is fixedly connected with the bottom end of the connecting shaft.

[0013] The preferred technical scheme is that the bottom side of the connecting piece two is provided with an annular protrusion corresponding to the inner ring of the bearing.

[0014] The preferred technical scheme is that the front fork arm is provided with a hoop away from the front fork arm, and the hoop is used to connect with the wheelchair.

[0015] The utility model discloses a front wheel structure of a wheelchair.

[0016] Due to the above technical scheme, the utility model has the beneficial effects that:

[0017] The utility model provides a front wheel structure and wheelchair, through the tooth surface structure one of connecting block one bottom side and tooth surface structure two of connecting block two top side meshing arrangement, with fixed support adjustment swing angle after the front fork, avoid the front fork to slip off the problem caused by the connecting place sliding, in addition, through the adjusting bolt control connecting piece one's rotation angle, the advancing direction of front wheel can be adjusted, avoid the left and right deviation condition of front wheel in the advancing process, through the adjustment, even if the front fork arm is through one end and wheelchair cooperation realizes the inclined type lifting, also can pass through above -mentioned structure and adjust front wheel, finally make connecting shaft keep perpendicular with horizontal plane all the time, and avoid the guiding deviation condition of front wheel to appear, ensure the use stability and safety of front wheel. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the front wheel structure schematic drawing that the utility model relates to.

[0019] Figure 2 It is the front wheel explosion map that the utility model relates to.

[0020] Figure 3 It is the connecting piece one structure schematic drawing that the utility model relates to.

[0021] Figure 4 It is the connecting piece two structure schematic drawing that the utility model relates to.

[0022] Reference signs: 1, front wheel, 2, front fork, 3, front fork arm, 301, sleeve, 3011, adjusting window, 302, hoop, 4, connecting shaft, 401, swing hole, 5, pin shaft, 6, connecting piece one, 601, guide hole, 602, arc tooth surface one, 603, adjusting lug, 604, screw hole, 7, connecting piece two, 701, arc tooth surface two, 702, annular protrusion, 8, bearing, 9, sealing cover, 10, sealing ring. DETAILED DESCRIPTION

[0023] The following by specific embodiment explains the embodiment of the utility model of this technology person can easily understand the other advantages and efficacy of the utility model from the content disclosed in this specification.

[0024] Please refer to Figures 1-4It should be noted that in the description of the utility model, it is necessary to point out that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the utility model product is used, and are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description and cannot be understood as indicating or implying relative importance. The terms "horizontal", "vertical", "overhanging" and the like do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0025] In the description of the utility model, it is also necessary to point out that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0026] Embodiment:

[0027] As Figures 1 to 4 shown, according to one general technical concept of the utility model, a front wheel (1) structure is provided, which comprises a front wheel (1) and a front fork (2), one end of the front fork (2) is connected with the front wheel (1), the other end of the front fork (2) is connected with a wheelchair through a front fork arm (3), the front fork (2) and the front fork arm (3) are connected through a multi-dimensional adjustment mechanism, the multi-dimensional adjustment mechanism is configured to adjust the front and rear swing angle and the left and right rotation angle of the front fork (2). After the front wheel (1) is adjusted by the front fork arm (3) to realize the inclined lifting adjustment, the axis perpendicular to the horizontal plane of the front wheel (1) will be offset, which can be adjusted through the multi-dimensional adjustment mechanism to avoid vibration or shaking of the front wheel (1) during driving; and the left and right deviation problems of the front wheel (1) during driving can also be avoided through the adjustment of the multi-dimensional adjustment mechanism.

[0028] As Figures 1 to 4As shown in the utility model of an example of an embodiment, the multi-dimensional adjustment mechanism is composed of a sleeve (301), a connecting shaft (4), a pin shaft (5), a connecting piece one (6) and a connecting piece two (7), the sleeve (301) is formed on the front fork arm (3), the connecting piece one (6) is rotatably arranged at the bottom end of the sleeve (301), the connecting piece one (6) is provided with a guide hole (601), the top end of the connecting shaft (4) extends into the sleeve (301) through the guide hole (601), the top end of the connecting shaft (4) is provided with a swing hole (401), the pin shaft (5) is inserted into the sleeve (301) and passes through the swing hole (401), the bottom end of the connecting shaft (4) is rotatably connected with the front fork (2), the connecting piece two (7) is sleeved on the connecting shaft (4), the bottom side of the connecting piece one (6) is provided with an arc tooth surface one (602), the top side of the connecting piece two (7) is provided with an arc tooth surface two (701), the arc tooth surface one (602) and the arc tooth surface two (701) are meshed and arranged and are configured to support and fix the front and back swing angle of the connecting shaft (4). That is, the connecting shaft (4) can drive the front fork (2) to swing around the pin shaft (5) to adapt to the height change of the front wheel (1); after adjustment, the connecting piece one (6) is pressed on the connecting piece two (7), the arc tooth surface one (602) and the arc tooth surface two (701) are meshed, and the connecting piece two (7) is pressed on the front fork (2), which plays a role in supporting and fixing the swing angle of the front fork (2) and avoiding the shaking of the vehicle body caused by the change of the swing angle during the travel.

[0029] As Figures 1 to 4 shown in the utility model of an example of an embodiment, the guide hole (601) adopts a waist-shaped hole, and the guide hole (601) is arranged along the front and back directions, and this structure is used to adapt to the adjustment of the front and back swing angle of the connecting shaft (4).

[0030] As Figures 1 to 4 shown in the utility model of an example of an embodiment, the swing hole (401) adopts a waist-shaped hole, and the swing hole (401) is arranged along the axial direction of the connecting shaft (4); this structure facilitates lifting the front side of the wheelchair to make the connecting shaft (4) freely sag under the action of the self-weight of the front wheel (1), and then makes the connecting piece one (6) and the connecting piece two (7) separate to adjust the meshing angle of the arc tooth surface one (602) and the arc tooth surface two (701).

[0031] As Figures 1 to 4As shown, in an exemplary embodiment of this utility model, the portion of connector one (6) extending into the sleeve (301) forms an adjusting ear (603), and the adjusting ear (603) is provided with a screw hole (604); the sleeve (301) is provided with a strip-shaped adjusting window (3011) arranged circumferentially on the sleeve wall; it also includes an adjusting bolt (not shown), which is screwed into the screw hole (604) through the adjusting window (3011) and configured to adjust the left and right rotation angle of connector one (6); the arc-shaped tooth surface one (602) on the bottom side of connector one (6) and the arc-shaped tooth surface two (701) on the top side of connector two (7) are engaged, and connector two (7) is pressed against the front fork (2) during the movement of the wheelchair. The two together constitute a structure for guiding the direction of movement of the front wheel (1). By adjusting the rotation angle of connector one (6), the direction of movement of the front wheel (1) can be adjusted, and the left and right deviation of the front wheel (1) during the movement can be avoided.

[0032] like Figures 1 to 4 As shown, in an exemplary embodiment of this utility model, a sealing cap (9) is provided at the top of the sleeve (301), and the sealing cap (9) and the sleeve (301) are sealed together by a sealing ring (10); this structure is used to prevent water from entering the sleeve (301) and causing rust, which would affect its service life.

[0033] like Figures 1 to 4 As shown, in an exemplary embodiment of this utility model, the top of the fork (2) is provided with a groove, and a bearing (8) is provided in the groove. The outer ring of the bearing (8) is fixedly connected to the groove, and the inner ring of the bearing (8) is fixedly connected to the bottom end of the connecting shaft (4). This structure is used to realize the rotational connection between the connecting shaft (4) and the fork (2).

[0034] like Figures 1 to 4 As shown, in an exemplary embodiment of the present invention, the bottom side of the connector two (7) is provided with an annular protrusion (702) corresponding to the inner ring of the bearing (8); this structure is used to prevent the connector two (7) from damaging the bearing (8).

[0035] like Figures 1 to 4 As shown, in an exemplary embodiment of this utility model, a clamp (302) is provided on the front fork arm (3) away from the front fork arm (3), and the clamp (302) is used to connect with the wheelchair to realize the height adjustment of the front wheel (1).

[0036] In addition, this application also relates to a wheelchair, including the aforementioned front wheel structure.

[0037] Therefore, this utility model has the following advantages:

[0038] The utility model provides a front wheel structure and wheelchair, through the meshing of the tooth surface structure one of connecting block one bottom side and tooth surface structure two of connecting block two top side sets up to fix the swing angle after the front fork of supporting adjustment, avoids the front fork to slip off the problem caused by the connecting place sliding, in addition, the rotation angle of connecting piece one can be controlled through adjusting bolt, the advancing direction of front wheel can be adjusted, avoids the situation that front wheel appears left and right deviation in the advancing process, through the adjustment, even if the front fork arm is matched with wheelchair through one end and realizes the inclined type lift, also can adjust the front wheel through the above structure, finally makes the connecting shaft always keep with horizontal plane vertical, and avoids the situation that front wheel appears guiding deviation, guarantees the use stability and safety of front wheel.

[0039] The above embodiments only exemplarily illustrate the principles and effects of the utility model, and are not used to limit the utility model. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and category of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should be covered by the claims of the utility model.

Claims

1. A front wheel structure comprising a front wheel and a front fork, one end of the front fork being connected to the front wheel, the other end of the front fork being connected to a wheelchair through a front fork arm, characterized in that: The front fork is connected with the front fork arm through a multi-dimensional adjusting mechanism, which is configured to adjust the front and rear swing angle and the left and right rotation angle of the front fork.

2. A front wheel structure according to claim 1, characterized in that: The multi-dimensional adjusting mechanism is composed of a sleeve, a connecting shaft, a pin shaft, a connecting piece one and a connecting piece two. The sleeve is formed on the front fork arm. The connecting piece one is arranged at the bottom end of the sleeve. The connecting piece one is provided with a guide hole. The top end of the connecting shaft extends into the sleeve through the guide hole. The top end of the connecting shaft is provided with a swing hole. The pin shaft is inserted into the sleeve and passes through the swing hole. The bottom end of the connecting shaft is rotationally connected with the front fork. The connecting piece two is sleeved on the connecting shaft. The bottom side of the connecting piece one is provided with an arc-shaped tooth surface one. The top side of the connecting piece two is provided with an arc-shaped tooth surface two. The arc-shaped tooth surface one and the arc-shaped tooth surface two are arranged in meshing mode and are configured to support and fix the front and rear swing angle of the connecting shaft.

3. A front wheel structure according to claim 2, characterized in that: The guide hole adopts a waist-shaped hole, and the guide hole is arranged in the front and rear direction.

4. A front wheel structure according to claim 2, characterized in that: The swing hole adopts a waist-shaped hole, and the swing hole is arranged in the axial direction of the connecting shaft.

5. A front wheel structure according to claim 2, characterized in that: The part of the connecting piece one extending into the sleeve is provided with an adjusting ear, and the adjusting ear is provided with a screw hole. The cylinder wall of the sleeve is provided with a strip-shaped adjusting window arranged in the circumferential direction. An adjusting bolt is screwed into the screw hole through the adjusting window and is configured to adjust the left and right rotation angle of the connecting piece one.

6. A front wheel structure according to claim 2, characterized in that: The top end of the sleeve is provided with a sealing cover, and the sealing cover and the sleeve are sealingly connected through a sealing ring.

7. A front wheel structure according to claim 2, characterized in that: The top end of the front fork is provided with an embedding groove, and the embedding groove is provided with a bearing. The outer ring of the bearing is fixedly connected with the embedding groove, and the inner ring of the bearing is fixedly connected with the bottom end of the connecting shaft.

8. A front wheel structure according to claim 7, characterized in that: The bottom side of the connecting piece two is provided with an annular protrusion corresponding to the inner ring of the bearing.

9. A front wheel structure according to claim 1, characterized in that: A hoop is arranged on the front fork arm away from the front fork arm, and the hoop is used to connect with the wheelchair.

10. A wheelchair characterized by: The front wheel structure comprises the front fork structure according to any one of claims 1-9. The front wheel structure comprises the front fork structure according to any one of claims 1-9.

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