Structure for adjusting height of anti-toppling wheel

Abstract

The utility model discloses a structure for adjusting the height of an anti-toppling wheel, and belongs to the field of wheelchairs. The device is simple in structure and easy to operate, the bolt type positioning piece and the ball head plunger type auxiliary positioning piece which are arranged on the installation pipe can be unlocked at the same time only by pressing the anti-tilting wheel fixing pipe, the specific height of the fixing pipe can be adjusted in the direction of the installation pipe after unlocking, the fixing pipe can be adjusted to a proper gear according to the actually needed height, and the anti-tilting wheel fixing pipe is convenient to use. When the anti-tilting wheel works normally, the fixing pipe is loosened, the fixing pipe can be ejected upwards to be reset under the action of an elastic piece of the reset component, meanwhile, a positioning hole and a positioning groove in the fixing pipe can be locked by the two positioning pieces in an embedded mode, and the anti-tilting wheel can work normally. An anti-tilting wheel structure which is complex in the prior art and needs two hands to adjust the height is simplified, and a user who is inconvenient to move can adjust the height of the anti-tilting wheel by himself / herself.

Description

Technical Field

[0001] The utility model belongs to the field of wheelchairs, and in particular relates to a structure for adjusting the height of an anti-tilt wheel. Background Art

[0002] Wheelchair anti-roll wheels usually refer to a pair of small wheels installed at the rear of the wheelchair. They will not contact the ground when the wheelchair is working normally. Their main function is to prevent the wheelchair from tipping over and improve its stability and safety.

[0003] A wheelchair is usually composed of two smaller guide wheels in the front and two larger driving wheels in the back. In particular, the movement of a manual wheelchair is controlled by the user pushing the driving wheels to move the wheelchair forward and backward. When the user pushes the driving wheels, the center of gravity of the body will inevitably move forward and backward. At this time, the driving wheels are also pushed, and the wheelchair as a whole will be at risk of flipping over and tipping backwards. The anti-tilt wheels will intervene at this time to prevent the wheelchair from falling completely backwards and give the user space to adjust the posture of the wheelchair.

[0004] The position of the anti-tip wheel also needs to be adjusted according to the actual needs of the user. For example, if the road surface on which the wheelchair moves is mostly flat, the height of the anti-tip wheel can be lowered to intervene earlier when the wheelchair flips over. If it is necessary to move up or down a slope at a large angle, the height of the anti-tip wheel needs to be raised. Otherwise, the slope will lift the front wheel too high and the anti-tip wheel will intervene too early, making it impossible to push the wheelchair up the slope.

[0005] When adjusting the height of the anti-tilt wheel equipped in the prior art, both hands are usually required to operate. In order to ensure the stability of the anti-tilt wheel, the structure is relatively complicated. For example, the anti-tilt wheel adopts a latch fixing method, a lock fixing method, etc., which makes it very troublesome to adjust the height.

[0006] Therefore, a new design is needed that ensures that the anti-tip wheel can be highly adjusted very easily while having a normal anti-tip function. Utility Model Content

[0007] In view of the above problems existing in the prior art, the purpose of the utility model is to provide a structure for adjusting the height of an anti-tilt wheel.

[0008] In order to solve the above problems, the technical solution adopted by the utility model is as follows:

[0009] A structure for adjusting the height of an anti-roll wheel comprises a wheelchair frame, a fixing tube, a mounting seat and a fixing component, wherein the mounting seat comprises a fixing frame and a mounting tube, the fixing tube and the mounting tube are sleeve structures, the fixing tube is arranged on the inner side of the mounting tube, the inner side of the mounting tube can allow the fixing tube to be displaced perpendicularly to the direction of the mounting tube, the fixing component is arranged on the outer side of the mounting tube, the fixing component is fixed and unlocked by the displacement of the mounting tube perpendicularly to the direction of the mounting tube, an anti-roll wheel is arranged at the bottom of the fixing tube, and the fixing frame is connected to the wheelchair frame.

[0010] The fixing component comprises a positioning component and a resetting component. The resetting component is arranged on the side of the mounting tube facing the ground, the positioning component is arranged on the opposite side of the resetting component, and the fixing tube is provided with a fixing component matching the positioning component.

[0011] The reset member is a reset spring, the positioning member is a fixing pin, and the fixing member is a positioning groove.

[0012] The installation tube is provided with an auxiliary positioning piece.

[0013] The auxiliary positioning member is arranged on the upper section of the mounting tube on the same side as the resetting member.

[0014] The auxiliary positioning piece is a ball plunger, and the fixing tube is provided with a positioning hole matching the ball plunger.

[0015] The return spring is a spring sheet structure, an extrusion block is arranged at the end of the spring sheet structure, the spring sheet structure is arranged on the outside of the mounting tube, and the extrusion block passes through the mounting tube and contacts the fixing tube.

[0016] The relative positions of the positioning groove and the positioning hole match the setting positions of the positioning piece and the auxiliary positioning piece, and can be positioned and engaged at the same time.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model has a simple structure and is easy to operate. Only by pressing the anti-tilt wheel fixing tube, the latch-type positioning piece and the ball plunger-type auxiliary positioning piece provided on the mounting tube can be unlocked at the same time. After unlocking, the specific height of the fixing tube can be adjusted along the direction of the mounting tube. According to the actual required height, it is adjusted to a suitable gear position. After the fixing tube is released, the fixing tube will be pushed upward to reset under the action of the spring sheet of the reset component. At the same time, the positioning hole and the positioning groove on the fixing tube will also be locked by the two positioning pieces, so that the anti-tilt wheel can enter a normal working state. The anti-tilt wheel structure that is relatively complex in the prior art and requires two hands to adjust the height is simplified, making it more convenient for users with limited mobility to adjust the height of the anti-tilt wheel by themselves. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall cross section of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure when the anti-tilt wheel is locked;

[0021] Figure 3 It is a structural schematic diagram when the anti-tilt wheel is adjusted;

[0022] In the figure: 1. mounting tube; 2. fixing tube; 3. fixing frame; 4. anti-tilt wheel; 5. positioning piece; 6. positioning groove; 7. reset spring piece; 8. extrusion block; 9. auxiliary positioning piece; 10. positioning hole. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with specific embodiments.

[0024] like Figure 1 As shown, the utility model is mainly aimed at improving the anti-tilt wheel part arranged at the rear of the wheelchair, which mainly includes a fixing tube 2 with an anti-tilt wheel 4 arranged at the bottom and a mounting seat part for assembling the component with the wheelchair frame.

[0025] The mounting base is mainly divided into two parts, the mounting tube 1 and the fixing frame 3 arranged on the outer wall of the mounting tube 1. The fixing tube 2 passes through the middle of the mounting tube 1 to form a sleeve structure, but the internal structure of the mounting tube 1 is not completely the same as that of the fixing tube 2. The internal space of the mounting tube 1 is slightly larger than the outer diameter of the fixing tube 2. When the mounting tube 1 is cut from the vertical direction, its cross section is a trapezoid with two upper bottoms connected. The fixing tube 2 can move slightly in the mounting tube 1 in a direction perpendicular to the mounting tube 1, and the fixing parts of the fixing tube 2 can be unlocked and locked by moving in this direction.

[0026] The fixing components used in the fixed tube 2 mainly include a positioning member and a reset member. The positioning member is used to position and lock the fixed tube 2 after determining the specific position of the fixed tube 2, while the reset member is used to assist the fixed tube 2 in resetting to the displacement locked working state after the adjustment of the fixed tube 2 is completed.

[0027] In this embodiment, a reset member is provided on the side of the lower section of the mounting tube 1 facing the ground, and a positioning member 5 is provided on the opposite side of the reset member. The reset member uses a reset spring 7 to reset the fixed tube 2. The reset spring 7 is provided on the fixing frame 3 outside the mounting tube 1. The fixing frame 3 is provided with a receiving groove that matches the structure of the reset spring 7. The reset spring 7 is installed in the receiving groove, and the side of the reset spring 7 facing the fixed tube 2 is the action end. An extrusion block 8 is provided at the end of the action end of the reset spring 7. The extrusion block 8 passes through the receiving groove and directly contacts the side wall of the mounting tube 1 and the fixed tube 2. When the entire device is locked, the reset spring 7 squeezes the fixed tube 2 through the extrusion block 8, so that the fixed tube 2 is squeezed and fixed at the position opposite to the reset spring 7. Its specific structure is as follows: Figure 2 shown.

[0028] The positioning member 5 provided on the opposite side of the reset spring 7 is a positioning pin in this embodiment, which is fixed on the mounting tube 1 on the opposite side of the reset spring 7 through a threaded hole. A positioning groove 6 is provided on the fixed tube 2 at a position corresponding to the positioning member 5. The positioning member 5 and the positioning groove 6 are engaged with each other to complete the locking of the fixed tube 2. There are multiple positioning grooves 6, and a certain spacing is provided between each of them, as different gears for adjusting the height of the fixed tube 2. The length of the positioning member 5 is determined according to the distance that the fixed tube 2 can move laterally in the mounting tube 1. When the fixed tube 2 is pressed down by force and contacts the wall of the mounting tube 1 on the opposite side of the positioning member 5, the positioning member 5 is completely disengaged from the positioning groove 6, which will not affect the movement of the fixed tube 2. When the fixed tube 2 rebounds under the action of the reset spring 7 and the extrusion block 8, the positioning member 5 can enter the positioning groove 6, lock the fixed tube 2 and prevent it from moving further.

[0029] In order to further enhance the stability of the fixed tube 2 after locking, an auxiliary positioning piece 9 is further provided on the upper section of the mounting tube 1 on the same side of the reset piece. The auxiliary positioning piece 9 is also provided on the fixing frame 3 outside the mounting tube 1. The auxiliary positioning piece 9 used in this embodiment is a ball plunger structure. The reason for adopting this structure is that when the fixed tube 2 is locked and unlocked, this structure has a certain degree of adaptability and can compress the auxiliary positioning piece 9 through lateral extrusion of the fixed tube 2. Although the locking effect is slightly worse than that of the positioning piece 5 with a positioning pin structure, it can better meet the function of auxiliary positioning.

[0030] A positioning hole 10 is opened at a position corresponding to the fixing tube 2 and the auxiliary positioning piece 9. The auxiliary positioning piece 9 of the ball plunger structure also passes through the side wall of the mounting tube 1 and contacts the fixing tube 2. In the locked state, it enters the positioning hole 10 to complete the locking of the fixing tube 2.

[0031] There are also multiple positioning holes 10, and the spacing between them is the same as the spacing between the positioning holes 10 and the positioning grooves 6. The distance between the positioning holes 10 and the positioning grooves 6 also needs to match the distance between the positioning member 5 and the auxiliary positioning member 9 to meet the requirements of simultaneous positioning and locking of the two positioning members.

[0032] In actual use, its status is as follows Figure 3 As shown, the user presses down the fixed tube 2, and the reset spring piece 7 connected to the extrusion block 8 is compressed in the opposite direction, and at the same time, the positioning member 5 is released from the positioning groove 6 and unlocked, and the auxiliary positioning member 9 is also released from the positioning hole 10 and unlocked, and the fixed tube 2 can be freely moved along the direction of the installation tube 1. After adjusting to a suitable position, the fixed tube 2 is released, and the reset spring piece 7 squeezes the fixed tube 2 toward the side of the positioning member 5 through the extrusion block 8. The user then slightly adjusts the position of the fixed tube 2, and after adjusting the positioning groove 6 to the accurate position matching the positioning member 5, the positioning member 5 and the auxiliary positioning member 9 enter the matching positioning groove 6 and positioning hole 10 at the same time under the extrusion of the reset spring piece 7, completing the locking of the fixed tube 2.

[0033] The device has a simple structure and is easy to operate. A user only needs one hand to easily adjust the specific position of the anti-tilt wheel, which is more suitable for the user to adjust the anti-tilt wheel alone.

Claims

1. A structure for adjusting the height of an anti-tilt wheel, comprising a wheelchair frame, characterized in that: It also includes a fixing tube, a mounting seat and a fixing component, the mounting seat includes a fixing frame and a mounting tube, the fixing tube and the mounting tube are of a sleeve structure, the fixing tube is arranged on the inner side of the mounting tube, the inner side of the mounting tube can allow the fixing tube to be displaced perpendicularly to the direction of the mounting tube, the fixing component is arranged on the outer side of the mounting tube, the fixing component is fixed and unlocked by the displacement of the mounting tube perpendicularly to the direction of the mounting tube, an anti-roll wheel is arranged at the bottom of the fixing tube, and the fixing frame is connected to the wheelchair frame.

2. The structure for adjusting the height of an anti-tilt wheel according to claim 1, characterized in that: The fixing component comprises a positioning component and a resetting component. The resetting component is arranged on the side of the mounting tube facing the ground, the positioning component is arranged on the opposite side of the resetting component, and the fixing tube is provided with a fixing component matching the positioning component.

3. The anti-tilt wheel height adjustment structure according to claim 2, characterized in that: The reset member is a reset spring, the positioning member is a fixing pin, and the fixing member is a positioning groove.

4. The anti-tilt wheel height adjustment structure according to claim 2, characterized in that: The installation tube is provided with an auxiliary positioning piece.

5. The structure for adjusting the height of an anti-tilt wheel according to claim 4, characterized in that: The auxiliary positioning member is arranged on the upper section of the mounting tube on the same side as the resetting member.

6. The anti-tilt wheel height adjustment structure according to claim 5, characterized in that: The auxiliary positioning piece is a ball plunger, and the fixing tube is provided with a positioning hole matching the ball plunger.

7. The anti-tilt wheel height adjustment structure according to claim 3, characterized in that: The return spring is a spring sheet structure, an extrusion block is arranged at the end of the spring sheet structure, the spring sheet structure is arranged on the outside of the mounting tube, and the extrusion block passes through the mounting tube and contacts the fixing tube.

8. The anti-tilt wheel height adjustment structure according to claim 6, characterized in that: The relative positions of the fixing component and the positioning hole match the setting positions of the positioning piece and the auxiliary positioning piece, and can be positioned and engaged at the same time.

Images