CN115891503A - Universal and directional automatic switching wheel and child stroller - Google Patents

Abstract

A kind of universal and directional automatic conversion wheel, including a wheel, a wheel fork, a wheel shaft, and a wheel joint. The wheel is provided with a ratchet pawl, and the wheel is pivotally connected to the wheel fork through the wheel shaft. The wheel fork is connected to the wheel joint in rotation, and an anti-rotation mechanism is provided between the wheel fork and the wheel joint to limit the rotation of the wheel fork and the wheel joint. When moving to the first direction, the The ratchet on the wheel cannot drive the ratchet to rotate effectively, and the anti-rotation mechanism takes effect. The wheel is a directional wheel, and when moving to the second direction opposite to the first direction, the ratchet on the wheel drives The ratchet rotates effectively, the anti-rotation mechanism fails, and the wheel becomes a universal wheel.

Description

Wheel and child stroller with universal and directional automatic conversion

technical field

The invention relates to the technical field of carts.

Background technique

The front wheels of conventional carts are universal wheels, and the rear wheels are directional wheels, which is more convenient to implement. Nowadays, carts that can be pushed to change directions have become more common in the market, but the existing implementation, usually After pushing the handle to change direction, the universal direction and orientation of the wheel are not switched, or need to be manually set. This design is not only inconvenient, but also inconvenient to implement.

Contents of the invention

The technical problem to be solved by the present invention is to provide a car with ingenious design, simple and firm structure, small volume, low production cost, and can directly realize the automatic conversion of wheel universal direction and orientation when the cart pushes the handle to change direction. mechanism.

The technical scheme adopted by the present invention to solve the above-mentioned technical problems is: a kind of universal and directional automatic conversion wheel, including wheels, wheel forks, wheel axles, wheel joints, the wheels are provided with ratchet pawls, and the wheels pass through the wheels. The wheel shaft is pivotally connected to the wheel fork, and the wheel fork is connected to the wheel joint in rotation, and an anti-rotation mechanism is arranged between the wheel fork and the wheel joint to limit the rotation between the wheel fork and the wheel joint. When the rotation of the joint moves to the first direction, the pawl on the wheel cannot drive the ratchet to rotate effectively, and the function of the anti-rotation mechanism takes effect. The wheel is a directional wheel and moves to the second direction opposite to the first direction. When moving in the direction, the ratchet on the wheel drives the ratchet to rotate effectively, the anti-rotation mechanism fails, and the wheel becomes a universal wheel.

Further, the anti-rotation mechanism includes a transmission assembly arranged in the wheel fork, an anti-rotation convex part, and an anti-rotation concave part provided at the lower end of the wheel joint, for providing the anti-rotation convex part to the anti-rotation The movement tendency of the rotating concave part is set on the elastic member inside the wheel fork, the anti-rotating convex part is arranged on the upper end of the transmission assembly, and the lower end of the transmission assembly interacts with the ratchet. When moving in the first direction, the wheel The ratchet cannot be driven to rotate effectively, and the anti-rotation convex part is locked in the anti-rotation concave part under the action of the elastic member. When moving, the wheel drives the ratchet to effectively rotate, and drives the anti-rotation convex portion on the upper end of the transmission assembly to disengage from the anti-rotation concave portion, and the wheel becomes a universal wheel.

Further, the wheel is provided with a brake mechanism, including a sliding piece slidably arranged on the wheel fork and a brake disc fixed on the wheel and having a brake groove, and the sliding piece has a The locking part in the brake groove, the brake mechanism has a brake release state and a brake state, and also includes a drive slider and a connecting piece connected between the slider and the drive slider, for providing the drive The first elastic member for the upward movement tendency of the slider and the second elastic member for providing the sliding member to slide towards the brake groove, a connecting rod is provided in the wheel joint and when the connecting rod moves relative to the wheel joint Drive down the pressing slider;

The acting force of the first elastic member on the sliding member is opposite to the acting force of the second elastic member on the sliding member, and the acting force of the first elastic member on the sliding member is greater than that of the second elastic member. The force exerted by the elastic member on the sliding member, in the absence of external force, the locking part breaks away from the braking groove, and the braking mechanism is in the brake release state; the movement of the connecting rod drives the downward sliding block to When moving downward, the driving slider in contact with the pressing slider also moves downward, the force exerted by the first elastic member on the sliding member becomes invalid, and the sliding member is in contact with the second elastic member. The active force slides down to the brake groove, the locking part is inserted into the brake groove, and the brake mechanism is in a braking state.

The present invention also provides another technical solution: a children's stroller, the above-mentioned wheels with automatic conversion between universal direction and orientation are arranged on the children's stroller, and the wheels can be quickly disassembled and installed.

The beneficial effects of the present invention are: simple structure, free switching between universal driving state and directional driving state without external power drive, convenient and labor-saving operation, flexible and effective.

Description of drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a perspective view of the present invention.

Fig. 3 is a schematic perspective view of the transmission assembly of the present invention.

Fig. 4 is a sectional view of the wheel joint of the present invention.

Fig. 5 is a perspective view of the present invention.

Fig. 6 is a three-dimensional schematic diagram of the braking structure of the present invention.

Figure 7 is an exploded view of the present invention.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments. The description herein is used to provide a further understanding of the present invention and constitutes a part of the application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention , does not constitute an improper limitation of the present invention.

This embodiment provides a wheel with automatic conversion between universal direction and orientation. All the above directions are described based on the direction that the user is facing when pushing the cart, that is, the direction that the push handle bar is in the forward pushing state and the direction that the user is facing when pushing the cart is the front.

Specifically, as shown in Figures 1 to 7, a wheel with automatic conversion between universal direction and orientation includes a wheel 1, a wheel fork 2, a wheel shaft a, a wheel joint 3, and the wheel fork 2 is provided with a ratchet pawl 4, and the ratchet pawl 4 includes a ratchet 41 and a ratchet 42, the wheel 1 is pivotally connected to the wheel fork 1 through the wheel shaft a, the wheel fork 2 is connected to the wheel joint 3 in rotation, and a detent mechanism is arranged between the wheel fork 2 and the wheel joint 3 to limit the rotation of the wheel The rotation of fork 2 and wheel joint 3.

As shown in Fig. 2, Fig. 3 and Fig. 4, the anti-rotation mechanism includes the transmission assembly arranged in the wheel fork 2, the anti-rotation convex part 6a, and the anti-rotation concave part 6b provided at the lower end of the wheel joint 3, which is used to provide the anti-rotation convex part 6a The elastic member 65 arranged in the wheel fork 2 toward the movement tendency of the anti-rotation concave portion 6b, as a preference, the transmission assembly in this embodiment includes a transmission gear 61, a rack 62, a connecting piece 63, a connecting block 64, and the anti-rotation convex portion 6a is provided At the upper end of the connecting block 64, an elastic member 65 is arranged below the connecting block 64, and the outer circle of the ratchet wheel 42 is provided with transmission teeth matched with the transmission gear 61, the transmission gear 61, the rack 62, the connecting piece 63 and the connecting block 64 When moving in the first direction, the ratchet 41 on the wheel 1 cannot drive the ratchet 42 to rotate effectively, and the anti-rotation convex part 6a is locked in the anti-rotation concave part 6b under the action of the elastic member 65, and the wheel 1 is oriented When the wheel moves in the second direction opposite to the first direction, the pawl 41 on the wheel 1 drives the ratchet 42 to rotate effectively, and the anti-rotation convex portion 6a on the upper end of the drive transmission assembly breaks away from the anti-rotation concave portion 6b, and the wheel 1 becomes ten thousand to the wheel.

As shown in Figures 5 and 6, the wheel is provided with a braking mechanism, including a sliding piece 51 slidably arranged on the wheel fork 2 and a brake disc fixed on the wheel 2 and having a brake groove 5b. The sliding piece 51 has a The catch portion 5a in the brake groove, the brake mechanism has a brake release state and a brake state, and also includes a drive slider 52 and a connecting piece connected between the slider 51 and the drive slider 52, for providing the drive slider 52 upwards. The first elastic member 53 of the movement trend and the second elastic member 54 used to provide the sliding member 51 to slide towards the brake groove, the wheel joint 3 is provided with a connecting rod 55 and when the connecting rod 55 moves relative to the wheel joint 3, it is driven down. Press down the slide block 56;

The active force of the first elastic member 53 on the sliding member 51 is opposite to the active force of the second elastic member 54 on the sliding member 51, and the active force of the first elastic member on the sliding member 51 is greater than that of the second elastic member 54 on the sliding member 51. Active force, in the absence of external force, the locking part 5a breaks away from the brake groove 5b, and the brake mechanism is in the brake release state; the movement of the connecting rod 55 drives the down-pressing slider 56 to move downward, and the driving slider in contact with the down-pressing slider 56 The block 52 also moves downward, and the active force exerted by the first elastic member 53 on the sliding member 51 fails, and the sliding member 51 slides down to the braking groove 5a under the active force of the second elastic member 54, and the locking part 5b is inserted in the braking groove 5a , the brake mechanism is in the braking state.

A kind of children's stroller, the said children's stroller is equipped with the above-mentioned universal and directional automatic switching wheels, and the said wheels can be quickly disassembled and installed. The mechanism here is a common and general structure, so it will not be introduced in detail .

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes, such as increasing or reducing the number of transmission components or changing the ratchet The assembly position of the pawl. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (4)

1. A universal and directional automatic switching wheel is characterized in that: the wheel comprises a wheel, a wheel fork, a wheel shaft and a wheel joint, wherein a ratchet wheel and pawl transmission mechanism is arranged on the wheel, the wheel is pivoted on the wheel fork through the wheel shaft, the wheel fork is rotationally connected with the wheel joint, a rotation stopping mechanism is arranged between the wheel fork and the wheel joint and used for limiting the rotation of the wheel fork and the wheel joint, when the wheel moves towards a first direction, a pawl on the wheel cannot drive the ratchet wheel to effectively rotate, the rotation stopping mechanism has an effective action, the wheel is a directional wheel, when the wheel moves towards a second direction opposite to the first direction, the pawl on the wheel drives the ratchet wheel to effectively rotate, the rotation stopping mechanism has an ineffective action, and the wheel becomes a universal wheel.

2. The automatically convertible universal and directional wheel of claim 1, further comprising: the rotation stopping mechanism comprises a transmission assembly arranged in a wheel fork, a rotation stopping convex part arranged on a rotation stopping concave part arranged at the lower end of the wheel joint and used for providing the rotation stopping convex part to an elastic part arranged in the wheel fork along the movement trend of the rotation stopping concave part, the rotation stopping convex part is arranged at the upper end of the transmission assembly, the lower end of the transmission assembly interacts with a ratchet wheel, when the transmission assembly moves towards a first direction, the wheel cannot drive the ratchet wheel to effectively rotate, the rotation stopping convex part is clamped and limited in the rotation stopping concave part under the action of the elastic part, when the wheel is a directional wheel, when the transmission assembly moves towards a second direction opposite to the first direction, the wheel drives the ratchet wheel to effectively rotate, the rotation stopping convex part at the upper end of the transmission assembly is driven to be separated from the rotation stopping concave part, and the wheel becomes a universal wheel.

3. The automatically convertible universal and directional wheel of claim 1, further comprising: the wheel is provided with a brake mechanism, the brake mechanism comprises a sliding part which is slidably arranged on the wheel fork and a brake disc which is fixedly arranged on the wheel and is provided with a brake groove, the sliding part is provided with a clamping part which can be inserted into the brake groove, the brake mechanism is provided with an unlocking state and a braking state, the brake mechanism also comprises a driving sliding block, a connecting piece which is connected between the sliding part and the driving sliding block, a first elastic piece which is used for providing upward movement tendency of the driving sliding block and a second elastic piece which is used for providing sliding of the sliding part to the brake groove, a connecting rod and a downward pressing sliding block which is used for driving the downward pressing when the connecting rod moves relative to the wheel joint are arranged in the wheel joint, the acting force of the first elastic piece on the sliding part is opposite to the acting force of the second elastic piece on the sliding part, the acting force of the first elastic piece on the sliding part is larger than the acting force of the second elastic piece on the sliding part, the clamping part is separated from the brake groove under the action of no external force, and the brake mechanism is in the unlocking state; the connecting rod moves to drive the pressing sliding block to move downwards, the driving sliding block which is in contact with the pressing sliding block also moves downwards, the acting force applied by the first elastic piece to the sliding piece fails, the sliding piece slides to the brake groove under the acting force of the second elastic piece, the clamping part is inserted in the brake groove, and the brake mechanism is in a brake state.

4. A stroller, characterized in that: the children's cart is provided with the universal and directional automatic switching wheel as claimed in any one of claims 1-3, and the wheel can be quickly disassembled and assembled.

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