CN217146119U - Wheel orientation structure - Google Patents

Abstract

The utility model provides a wheel oriented structure, including the wheel seat, install the front fork in wheel seat bottom and install the apron at wheel seat top, install between apron and wheel seat and make the apron that pushes down have the upward cover plate spring that resets the trend, it has the vertical mounting hole that runs through from top to bottom to open on the wheel seat, it has the directional hole that corresponds with vertical mounting hole to open on the front fork, install orienting mechanism in the vertical mounting hole, through pushing down the apron enable orienting mechanism downstream to insert directional downthehole and be in the orientation, perhaps make orienting mechanism upstream move to break away from directional hole and be in the unblock state. The wheel orientation structure can enable the orientation mechanism to move downwards to be inserted into the orientation hole and be in an orientation state by pressing the cover plate, and enable the orientation mechanism to move upwards to be separated from the orientation hole and be in an unlocking state by pressing the cover plate again in the orientation state.

Description

Wheel orientation structure

Technical Field

The utility model relates to a handcart especially relates to a wheel bearing structure of handcart.

Background

To improve the safety of the stroller, the conventional stroller is provided with an orienting device on the front wheel. At present, a front wheel orientation mechanism is characterized in that a lock pin is inserted into a lock pin insertion hole between a front wheel fork and a front wheel seat, the lock pin is often inserted into or pulled out of the lock pin insertion hole from the bottom, a user needs to grip the lock pin at the bottom of the front wheel fork during operation, and the operation is very inconvenient. Other structures for orienting the wheels of the stroller are also disclosed in the prior art, such as a stroller front wheel orienting steering mechanism disclosed in the chinese utility model patent No. ZL201820226612.6 (publication No. CN 207843022U), the orienting steering mechanism comprises an upper support frame, a front support frame and a front wheel set, a rotary shifting block and a traction block are fixed in the upper support frame, and a guide pillar of the rotary shifting block extends into an arc-shaped groove; one end of a steel wire rope is fixed on one side of the traction block, which is far away from the rotating pin, the other end of the steel wire rope is connected with a rotating driving block, the rotating driving block is accommodated in the inner bottom of the front support frame, and a compression spring is connected between the top of the rotating driving block and the inner bottom of the front support frame; a connecting block is coaxially arranged below the rotary driving block, through holes for the wheel shafts of the front wheel sets to pass through are formed in the centers of the rotary driving block and the connecting block, spiral inclined planes are machined on the inner walls of the through holes in the centers of the rotary driving block, and correspondingly, salient points matched with the spiral inclined planes are machined on the wheel shafts of the front wheel sets; the connecting block is matched with the front wheel set in a rotating way. Although the directional steering mechanism can realize the directional steering function by stirring the rotating shifting block, the structure is complex.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to above-mentioned prior art current situation, provide a simple structure, wheel orientation and unblock convenient operation's wheel orientation structure.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: this wheel bearing structure, including the wheel seat, install the front fork bottom the wheel seat and install the apron at wheel seat top, its characterized in that: the wheel seat is provided with a vertical mounting hole which penetrates through the wheel seat from top to bottom, the front fork is provided with a directional hole corresponding to the vertical mounting hole, a directional mechanism is arranged in the vertical mounting hole, and the directional mechanism can move downwards to be inserted into the directional hole to be in a directional state or move upwards to be separated from the directional hole to be in an unlocking state through pressing the cover plate.

Preferably, the shaping has first joint portion on the internal perisporium of vertical mounting hole, and the bottom of vertical mounting hole is equipped with orientation mechanism reset spring, orientation mechanism have with first joint portion matched with second joint portion, under orientation state, orientation mechanism reset spring compressed and first joint portion and second joint portion looks joint and prevent orientation mechanism to move up, under the unblock state, first joint portion breaks away from and orientation mechanism upwards resets under orientation mechanism reset spring's spring action with second joint portion. Thus, the wheel orientation and unlocking functions can be realized through the matching of the first clamping part and the second clamping part.

The orientation mechanism can have various structures, preferably, the orientation mechanism comprises an upper push rod, a lower push rod and an orientation rod assembly, the upper end of the upper push rod is used for being matched with the cover plate, the lower end of the upper push rod is abutted against the upper end of the lower push rod, the lower end of the lower push rod is abutted against the upper end of the orientation rod assembly, an orientation mechanism reset spring is sleeved at the lower end of the orientation rod assembly, the upper end of the orientation mechanism reset spring is abutted against the orientation rod assembly, and the lower end of the orientation mechanism reset spring is abutted against the wheel seat.

In order to enable the upper push rod to drive the first clamping portion of the lower push rod to be clamped or separated from the second clamping portion, a guide structure which is matched with the upper push rod and the lower push rod is arranged between the upper push rod and the lower push rod, the outer peripheral portion of the lower push rod is convexly provided with the second clamping portion, through the guide structure, the upper push rod can drive the lower push rod to rotate around the central axis of the upper push rod when moving downwards, and then the first clamping portion and the second clamping portion are clamped or separated from each other.

The guide structure may have various structures, and preferably, the lower end surface of the upper push rod has first saw-toothed portions distributed circumferentially, the upper end surface of the lower push rod has second saw-toothed portions distributed circumferentially and engaged with the first saw-toothed portions, and the first saw-toothed portions and the second saw-toothed portions constitute the guide structure.

First joint portion and second joint portion can have multiple structure, preferably, second joint portion is the radial lug of protruding peripheral part of locating second sawtooth portion, radial lug is along circumference interval distribution, first joint portion for locate vertical mounting hole interior perisporium and with the draw-in groove of radial lug one-to-one, the draw-in groove is for supplying the one-way card of radial lug to go into and along the one-way draw-in groove that breaks away from of card income direction, forms vertical spout between the adjacent draw-in groove, under the orientation state, radial lug card is gone into in the draw-in groove, under the unblock state, radial lug breaks away from the draw-in groove and can slide from top to bottom in vertical spout.

The directional rod assembly can have a plurality of structures, preferably, the directional rod assembly comprises a directional rod mounting seat, a directional pin and an inner spring, the upper end of the directional rod mounting seat is abutted to the lower end of the lower push rod, a vertical hole is formed in the directional rod mounting seat, the upper end of the directional pin extends into the vertical hole and can move up and down relative to the vertical hole, the inner spring is arranged in the vertical hole, the upper end of the inner spring is abutted to the top of the vertical hole, and the lower end of the inner spring is abutted to the upper end of the directional pin. Therefore, when the lower push rod moves downwards, the orientation rod mounting seat moves downwards along with the lower push rod synchronously, and the orientation pin can also move downwards under the action of the elastic force of the inner spring along with the downward movement of the orientation rod mounting seat and is finally inserted into the orientation hole to realize the orientation function.

Preferably, in any one of the above aspects, the vertical mounting hole is close to a side portion of the wheel seat.

Compared with the prior art, the utility model has the advantages of: this wheel orientation structure passes through apron, apron spring and orientation mechanism's cooperation, presses the apron just can make orientation mechanism move down to inserting the orientation downthehole and be in the orientation state to, under the orientation state, press the apron once more and just can make orientation mechanism move up to breaking away from the orientation hole and be in the unblock state, not only the structure is comparatively simple, and the orientation of wheel and unblock all only need be realized through the apron at pressing wheel seat top in addition, and it is very convenient, laborsaving to operate.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

figure 2 is an exploded view of the wheel orientation structure of figure 1;

fig. 3 is a schematic structural view of an embodiment of the present invention in a wheel orientation state;

fig. 4 is a schematic structural diagram of an embodiment of the present invention in a wheel unlocking state;

fig. 5 is a cross-sectional view of the structure of the wheel alignment structure shown in fig. 1 (with the alignment rod assembly removed);

fig. 6 is a schematic structural diagram of an orientation mechanism according to an embodiment of the present invention;

fig. 7 is a schematic structural view of a wheel seat according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 4, the wheel orientation structure of the present embodiment includes a wheel seat 1, a front fork 2, a cover plate 3, a cover plate spring 4, an orientation mechanism return spring 5, and other main components. Wherein, the front fork 2 is arranged at the bottom of the wheel seat 1, and the cover plate 3 is arranged at the top of the wheel seat 1. The cover plate spring 4 is installed between the cover plate 3 and the wheel seat 1, when the cover plate 3 is pressed downwards, the cover plate spring 4 is compressed, the cover plate 3 is loosened, and the cover plate 3 is reset upwards under the elastic force action of the cover plate spring 4.

The wheel seat 1 is provided with a vertical mounting hole 11 which penetrates through the wheel seat from top to bottom, the vertical mounting hole 11 is close to the side part of the wheel seat 1, the orienting mechanism is arranged in the vertical mounting hole 11, and the orienting mechanism return spring 5 is arranged at the bottom of the vertical mounting hole 11. The front fork 2 is provided with a directional hole 21, and the directional hole 21 is positioned right below the vertical mounting hole 11. When the cover plate 3 is pressed, the orientation mechanism can be driven to move downwards to be inserted into the orientation hole 21 to be in an orientation state, or the orientation mechanism can be driven to move upwards to be separated from the orientation hole 21 to be in an unlocking state.

As shown in fig. 5 and 7, in the present embodiment, a first clamping portion is formed on the inner peripheral wall of the vertical mounting hole 11, the first clamping portion is a clamping groove 12 formed on the inner peripheral wall of the vertical mounting hole 11, and a vertical sliding groove 13 is formed between adjacent clamping grooves 12. In this embodiment, there are three clamping grooves 12, and correspondingly, there are three vertical sliding grooves 13, which are uniformly distributed along the circumferential direction.

The orienting mechanism of this embodiment includes push-up rod 6, push-down lever 7 and orienting rod subassembly 8, and wherein, the upper end of push-up rod 6 is used for cooperateing with apron 3, and the lower extreme of push-up rod 6 offsets with the upper end of push-down lever 7, and the lower extreme of push-down lever 7 offsets with the upper end of orienting rod subassembly 8, and the lower extreme at orienting rod subassembly 8 is established to orienting mechanism reset spring 5 cover, and the upper end and the orienting rod subassembly 8 of orienting mechanism reset spring 5 offset, and the lower extreme and the wheel seat 1 of orienting mechanism reset spring 5 offset.

As shown in fig. 6, the lower end surface of the upper push rod 6 has first serrations 61 distributed circumferentially, the upper end surface of the lower push rod 7 has second serrations 71 distributed circumferentially and engaged with the first serrations, and the first serrations 61 and the second serrations 71 form a guide structure in cooperation with each other. Through this guide structure, push rod 7 can also drive down push rod 7 and make rotary motion around self the central axis when push rod 6 drives down push rod 7 and moves down. The outer periphery of the second sawtooth part 71 is convexly provided with three radial convex blocks 72, the radial convex blocks 72 are uniformly distributed at intervals along the circumferential direction, and the radial convex blocks 72 form second clamping parts which are in one-to-one correspondence with the clamping grooves 12. The locking slot 12 of the present embodiment is a one-way locking slot, i.e. for the radial protrusion 72 to be locked in one way and released in one way along the locking direction.

In the orientation state, the orientation mechanism return spring 5 is compressed, and the radial projection 72 snaps into the detent 12, thereby preventing the orientation mechanism from returning upward. In the unlocked state, the radial protrusion 72 is disengaged from the engaging groove 12, and slides upward along the vertical sliding groove 13 under the elastic force of the return spring 5 of the orientation mechanism, so that the orientation mechanism is reset.

As shown in fig. 6, the orientation rod assembly 8 of the present embodiment includes an orientation rod mounting seat 81, an orientation pin 82, and an inner spring 83, wherein an upper end of the orientation rod mounting seat 81 abuts against a lower end of the lower push rod 7, a vertical hole 811 is formed inside the orientation rod mounting seat 81, an upper end of the orientation pin 82 extends into the vertical hole 811 and can move up and down relative to the vertical hole 811, the inner spring 83 is disposed inside the vertical hole 811, an upper end of the inner spring 83 abuts against a top of the vertical hole 811, and a lower end of the inner spring 83 abuts against an upper end of the orientation pin 82. When the lower push rod 7 moves downward, the orientation lever mount 81 moves downward in synchronization with the lower push rod, and as the orientation lever mount 81 moves downward, the orientation pin 82 also moves downward by the elastic force of the inner spring 83, and is finally inserted into the orientation hole 21 of the front fork 2.

The wheel orientation structure works according to the following principle:

as shown in fig. 3, when the cover plate 3 is pressed, the cover plate 3 drives the upper push rod 6 to move downwards along its own central axis direction, the upper push rod 6 drives the lower push rod 7 to move downwards along its own central axis direction, at the same time, the lower push rod 7 performs a rotational motion around its own central axis, the lower push rod 7 drives the orientation mechanism to move downwards, when the lower push rod 7 moves to a specific distance and rotates to a specific angle, the radial protrusion 72 of the lower push rod 7 is clamped into the clamping groove 12 of the wheel seat 1, and at this time, the orientation pin 82 of the orientation mechanism is inserted into the orientation hole 21 of the front fork 2, so as to realize the wheel orientation function.

As shown in fig. 4, when the wheel orientation function shown in fig. 3 is performed, the cover plate 3 is pressed, the cover plate 3 drives the upper push rod 6 to move downward along its own central axis direction, the upper push rod 6 drives the lower push rod 7 to move downward along its own central axis direction, at the same time, the lower push rod 7 performs a rotational motion around its own central axis, the lower push rod 7 drives the orientation mechanism to move downward, when the lower push rod 7 moves to a specific distance and rotates to a specific angle, the movement and the rotational motion are stopped at the same time, the radial protrusion 72 is held in the vertical sliding groove 13 of the wheel base 1, at this time, the force pressed on the cover plate 3 is removed, the cover plate 3 is reset by the cover plate spring 4, and at the same time, the upper push rod 6, the lower push rod 7 and the orientation mechanism 8 are also reset upward as a whole by the orientation mechanism reset spring 5, thereby disengaging the orientation pin 82 from the orientation hole 21, the wheel orientation function is released.

Claims (8)

1. The utility model provides a wheel oriented structure, includes wheel seat (1), installs front fork (2) and apron (3) of installing at wheel seat top in wheel seat bottom, its characterized in that: install between apron (3) and wheel seat (1) and make the apron that pushes down have the apron spring (4) of the trend that upwards resets, vertical mounting hole (11) that run through from top to bottom are gone up to opening in wheel seat (1), it has directional hole (21) corresponding with vertical mounting hole (11) to open on front fork (2), install orientation mechanism in vertical mounting hole (11), through pushing down apron (3) and enabling orientation mechanism move down to inserting in directional hole (21) and be in the orientation state, perhaps make orientation mechanism move up to breaking away from directional hole (21) and be in the unblock state.

2. The wheel orienting structure of claim 1, wherein: the shaping has first joint portion on the internal perisporium of vertical mounting hole (11), and the bottom of vertical mounting hole (11) is equipped with directional mechanism reset spring (5), directional mechanism have with first joint portion matched with second joint portion, under directional state, directional mechanism reset spring (5) are compressed and first joint portion and second joint portion looks joint and prevent directional mechanism to move up, under the unblock state, first joint portion breaks away from and directional mechanism upwards resets under the spring action of directional mechanism reset spring (5) with second joint portion.

3. The wheel alignment structure as set forth in claim 2, wherein: the orienting mechanism comprises an upper push rod (6), a lower push rod (7) and an orienting rod assembly (8), the upper end of the upper push rod (6) is used for being matched with the cover plate (3), the lower end of the upper push rod (6) is abutted to the upper end of the lower push rod (7), the lower end of the lower push rod (7) is abutted to the upper end of the orienting rod assembly (8), a return spring (5) of the orienting mechanism is sleeved at the lower end of the orienting rod assembly (8), the upper end of the return spring (5) of the orienting mechanism is abutted to the orienting rod assembly (8), and the lower end of the return spring (5) of the orienting mechanism is abutted to the wheel seat (1).

4. A wheel alignment structure as claimed in claim 3, wherein: the utility model discloses a push rod structure, including push rod (7), last push rod (6), lower push rod (7) and upper push rod (6) are connected, have the guide structure of mutually supporting between push rod (7), the peripheral part protruding of lower push rod (7) is equipped with second joint portion, through guide structure, push rod (6) enable the lower push rod to make rotary motion around self the central axis when driving push rod (7) synchronous axial displacement in the downstream process, and then make first joint portion and second joint portion joint or break away from mutually.

5. The wheel alignment structure of claim 4, wherein: the lower end face of the upper push rod (6) is provided with first sawtooth parts (61) distributed in the circumferential direction, the upper end face of the lower push rod (7) is provided with second sawtooth parts (71) distributed in the circumferential direction and meshed with the first sawtooth parts, and the first sawtooth parts (61) and the second sawtooth parts (71) form the guide structure.

6. The wheel alignment structure as set forth in claim 5, wherein: second joint portion is protruding radial lug (72) of locating the peripheral part of second sawtooth part (71), circumference interval distribution is followed to radial lug (72), first joint portion for locate vertical mounting hole (11) internal perisporium and with radial lug (72) one-to-one draw-in groove (12), draw-in groove (12) are for supplying radial lug one-way card to go into and along the one-way draw-in groove that breaks away from of card direction, form vertical spout (13) between adjacent draw-in groove (12), under directional state, radial lug (72) card is gone into in draw-in groove (12), under the unblock state, radial lug (72) break away from draw-in groove (12) and can slide from top to bottom in vertical spout (13).

7. A wheel alignment structure as claimed in any one of claims 3 to 6, wherein: directional pole subassembly (8) are including directional pole mount pad (81), directional round pin (82) and inner spring (83), the upper end of directional pole mount pad (81) with the lower extreme of push down rod (7) offsets, and directional pole mount pad (81) is inside to be opened vertical hole (811), the upper end of directional round pin (82) stretch into extremely vertical hole (811) are inside and can reciprocate vertical hole relatively, inner spring (83) are located in vertical hole (811), the upper end of inner spring (83) offsets with the top of vertical hole (811), and the lower extreme of inner spring (83) offsets with the upper end of directional round pin (82).

8. The wheel orienting structure of claim 1, wherein: the vertical mounting hole (11) is close to the side part of the wheel seat (1).

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