CN216886862U - Shock-proof structure for wheel - Google Patents

Abstract

The utility model relates to a wheel shock-absorbing structure, which comprises a frame, wherein a wheel central shaft and a cross rod which are parallel are arranged on the frame; one end of the torsion arm is rotatably connected with the end part of the cross rod, and the other end of the torsion arm is rotatably connected with one end of the wheel center shaft close to the frame; the rotating part is sleeved on the cross rod in a circumferential rotating manner, and a first groove and a second groove are formed in the outer periphery of the rotating part at intervals; one end of the first elastic piece is acted on the torque arm, and the other end of the first elastic piece is acted on the rotating piece so that the rotating piece always has a forward rotating trend; one end of the swing rod is rotatably arranged on the cross rod, the other end of the swing rod is provided with a locking column, the swing rod rotates in the reverse direction until the locking column is positioned in the first groove or the second groove to limit the rotating piece, and the swing rod rotates in the forward direction until the locking column is separated from the first groove or the second groove to allow the rotating piece to rotate; the second elastic piece makes the pendulum rod have the trend of rotating along the reverse direction all the time, can adjust the effect of moving away to avoid possible earthquakes to different road conditions.

Description

Shock-proof structure for wheel

Technical Field

The utility model relates to the technical field of carts, in particular to a wheel shock absorption structure.

Background

At present, the stroller has different requirements in use according to different use scenes. In an uneven pushing road section, the stroller jolts, and in order to enable a child in the stroller to feel as if walking on flat ground on the jolt road section, a shock absorption structure needs to be arranged on the stroller. The existing shock-absorbing structure is a shock-absorbing mode simulating the instruments such as a bicycle, a shock-absorbing spring is arranged on a frame rod piece in the vertical direction of the stroller to perform shock-absorbing treatment, and the shock-absorbing spring is sleeved on a vertical rod piece connected with a wheel to realize a shock-absorbing effect. The current shock absorber structure need be equipped with certain shock absorber stroke in the vertical and supply shock absorber spring flexible, like the well utility model patent of patent number ZL02286624.8 (the grant bulletin number is CN2587739Y) wheel support shock absorber structure of bassinet, this shock absorber structure needs the height of artificial raising frame, can bring inconvenience in the use.

In order to solve the above problems, a chinese utility model patent with patent number ZL201721920825.0 (No. CN207955197U) discloses a wheel suspension structure, which includes a frame and wheels, wherein an opening is formed on a side wall of the frame and is close to a central axis of the wheels; the cross rod is arranged on the frame and is parallel to the central shaft of the wheel; the first end of the torsion arm is rotatably connected with the end part of the cross rod, and the second end of the torsion arm is rotatably connected with one end of the wheel center shaft close to the frame; the wheel central shaft is provided with a sliding column which can pass through the second end of the torsion arm and slide up and down along the inner side wall of the opening; the elastic piece makes the traveller keep the trend of following the opening inside wall and sliding down all the time.

The wheel shock-absorbing structure converts the impact force in the vertical direction into the impact force in the horizontal direction so as to be absorbed in the horizontal direction, and the shock-absorbing buffer of the baby carriage is realized by utilizing the horizontal space, so that the space waste of the frame is reduced, but the elastic part provides relatively fixed elastic force, and the requirement of the wheel shock-absorbing structure on the flat ground and the rugged road surface on the elastic buffer capacity is different.

SUMMERY OF THE UTILITY MODEL

The present invention provides a wheel suspension structure capable of adjusting the degree of compression of an elastic member to adjust the suspension effect according to different road conditions.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a shock absorbing structure for a wheel comprises

A frame, on which a rotatable wheel and a cross bar parallel to the central axis of the wheel are arranged,

the first end of the torsion arm is rotatably connected to the end part of the cross rod, and the second end of the torsion arm is rotatably connected to one end of the wheel center shaft close to the frame;

the method is characterized in that: also comprises

The rotating piece is sleeved on the cross rod in a circumferential rotating manner, and a first groove and a second groove are formed in the outer periphery of the rotating piece at intervals;

the first end of the first elastic element and the second end of the first elastic element act on the torsion arm to enable the second end of the torsion arm to always keep a downward sliding trend, and the second end of the first elastic element acts on the rotating element to enable the rotating element to always have a forward rotating trend;

the swing rod is rotationally constrained with the cross rod, the rotation axis of the swing rod is overlapped with or parallel to the axis of the cross rod, a locking column is arranged on the swing rod, the swing rod rotates in the reverse direction until the locking column is positioned in the first groove or the second groove, the relative position of the rotating piece and the cross rod is limited, and the swing rod rotates in the forward direction until the locking column is separated from the first groove or the second groove, so that the rotating piece is allowed to rotate relative to the cross rod;

and the second elastic piece enables the swing rod to always have the tendency of rotating along the reverse direction.

In order to enable the locking column to be stably positioned in the first groove or the second groove, the first groove is positioned at the rear side of the second groove in the forward direction, and the depth of the first groove is smaller than that of the second groove. When the locking column is positioned in the first groove, the compression degree of the first elastic piece is greater than that of the first elastic piece when the locking column is positioned in the second groove, so that the locking force required when the locking column is positioned in the second groove is greater, and the depth design of the first groove and the second groove enables the locking column to be positioned in the second groove, so that the locking effect between the locking column and the second groove is stronger, and the locking column can be stably positioned in the first groove or the second groove.

In order to ensure that the locking column enters the second groove from the first groove more smoothly, the outer periphery of the rotating part is provided with a connecting surface positioned between the first groove and the second groove, and the connecting surface is in smooth transition with the first groove and in arc transition with the second groove. The design can enable the locking column to be separated from the first groove without forward rotation of the swing rod when the rotating member rotates reversely, and the locking column slides to the second groove along the connecting surface, so that the locking column enters the second groove from the first groove more smoothly, and the operation of switching the locking column from the first groove to the second groove is simplified.

In order to shorten the length of the swing rod and shorten the force arm, the rotation axis of the swing rod is parallel to the axis of the cross rod; the locking device is characterized in that a mounting seat is arranged on the cross rod, a rotating shaft parallel to the cross rod is arranged at the first end of the swing rod, the rotating shaft is rotatably arranged on the mounting seat, and the locking column is arranged at the second end of the swing rod.

In order to facilitate shortening of the length of the first elastic part, the first elastic part is a first torsion spring sleeved on the cross rod, and the rotating part is located between the first torsion spring and the mounting seat. This enables the moment arm of the first torsion spring to be shorter.

In order to facilitate the application of force when rotating the swing rod, a first pulling piece is sleeved on the rotating shaft, the second elastic piece is sleeved on a second torsion spring on the rotating shaft, the first end of the second torsion spring is abutted to the mounting seat, and the second end of the second torsion spring is abutted to the first pulling piece.

In order to facilitate a user to contact the first trip part, the frame is provided with a cross beam which is positioned above the cross rod and is parallel to the cross rod, the cross rod is fixed on the cross beam through the mounting seat, and the rotating shaft is positioned at the lower part of the mounting seat.

In order to facilitate the force application when the rotating piece is rotated, a second trip piece is arranged on the rear side of the rotating piece.

In order to make the rotating part structure simpler, the rotating part comprises a ring piece provided with the first groove and the second groove and a connecting part convexly arranged on one side of the peripheral wall of the ring piece, the rear side of the connecting part is connected with the second pulling part, and the front side of the connecting part is provided with a hook part which is abutted against the second end of the first elastic part.

In order to limit the rotation range of the rotating part, the frame is provided with a cross beam which is positioned above the cross rod and is parallel to the cross rod, and the front surface of the hook part is abutted against the cross beam when the locking column is positioned in the first groove.

Compared with the prior art, the utility model has the advantages that: through set up rotation piece and pendulum rod on the horizontal pole, and in the cooperation of first elastic component and second elastic component, make the locking post be positioned in first recess or second recess, thereby make first elastic component can be in different compression degree in order to provide different shock-absorbing capacity, thereby make wheel shock absorber structure have different cushioning effect of moving away, can rotate the pendulum rod or rotate the piece and be positioned in first recess or be positioned in the two kinds of states of second recess with switching locking post according to the road surface condition, thereby adjust wheel shock absorber structure's effect of moving away to avoid possible earthquakes, make wheel shock absorber structure can adapt to different road surface conditions better, can avoid first elastic component excessive fatigue, thereby prolong wheel shock absorber structure's life.

Drawings

FIG. 1 is a perspective view of an embodiment of the present invention (with the locking post positioned in the first groove);

FIG. 2 is a perspective view of an embodiment of the present invention with the wheel removed (the locking post positioned in the first groove);

FIG. 3 is a perspective view of the embodiment of the present invention with the wheel removed (the locking post from another perspective is positioned in the first recess);

FIG. 4 is a perspective view of the embodiment of the present invention with the wheel removed (the locking post positioned in the second groove);

FIG. 5 is a perspective view of the embodiment of the present invention with the wheel removed (the locking post is removed from the first groove or the second groove);

fig. 6 is a perspective view of a rotating member according to an embodiment of the present invention.

Detailed Description

The utility model is described in further detail below with reference to the accompanying examples.

As shown in FIGS. 1 to 6, the preferred embodiment of the present invention is shown.

As shown in fig. 1 to 6, the wheel suspension structure in this embodiment includes a frame 1, a cross bar 3, a torsion arm 4, a rotating member 5, a first torsion spring 61, a second torsion spring 62, a swing link 7, and a mounting base 8. The forward direction in this embodiment refers to the counterclockwise direction in the orientation shown in fig. 2, and the reverse direction refers to the clockwise direction in the orientation shown in fig. 2.

The frame 1 is provided with a rotatable wheel 11 and a crossbar 3, the crossbar 3 being parallel to a wheel centre axis 111 (see fig. 1). The torque arm 4 is pivotally connected at a first end to the end of the crossbar 3 and at a second end to the end of the wheel axle 111 adjacent to the frame 1 (see fig. 2). The rotating member 5 is circumferentially and rotatably disposed on the cross bar 3 (see fig. 1), and has a first groove 511 and a second groove 512 spaced apart from each other on an outer periphery thereof (see fig. 6). The first torsion spring 61 is sleeved on the cross bar 3, and the first end 611 of the first torsion spring 61 abuts against the torsion arm 4 to keep the second end of the first torsion arm 4 always in a downward sliding trend, and the second end of the first torsion spring 61 abuts against the rotating member 5 to keep the rotating member 5 always in a forward rotating trend (see fig. 3). The swing rod 7 is rotatably constrained with the cross rod 3, the rotation axis of the swing rod 7 is parallel to the axis of the cross rod 3, the swing rod 7 is provided with a locking column 72 (see fig. 5), the swing rod 7 rotates in the reverse direction until the locking column 72 is positioned in the first groove 511 (see fig. 2) or the second groove 512 (see fig. 4) to limit the relative position of the rotating member 5 and the cross rod 3, and the swing rod 7 rotates in the forward direction until the locking column 72 is separated from the first groove 511 or the second groove 512 to allow the rotating member 5 to rotate relative to the cross rod 3. The second torsion spring 62 makes the swing link 7 always have a tendency to rotate in the reverse direction.

The wheel suspension structure in this embodiment, through set up rotation piece 5 and pendulum rod 7 on horizontal pole 3, and under the cooperation of first torsion spring 61 and second torsion spring 62, make locking post 72 be positioned in first recess 511 or in second recess 512, thereby make first torsion spring 61 can be in different compression degree in order to provide different shock-absorbing capacity, thereby make wheel suspension structure have different shock-absorbing cushioning effects, can rotate pendulum rod 7 or rotate 5 and be positioned in first recess 511 or be positioned two kinds of states in second recess 512 with switching locking post 72 according to the road surface condition, thereby adjust wheel suspension structure's shock-absorbing effect, make wheel suspension structure can adapt to different road surface conditions better, can avoid first torsion spring 61 excessive fatigue, thereby prolong wheel suspension structure's life.

In the forward direction, the first groove 511 is located at the rear side of the second groove 512 (see fig. 2 and 6), so that the compression degree of the first torsion spring 61 when the locking column 72 is located in the first groove 511 is greater than that of the first torsion spring 61 when the locking column 72 is located in the second groove 512, thereby the locking force required when the locking column 72 is located in the second groove 512 is greater; the depth of the first groove 511 is smaller than the depth of the second groove 512, so that the locking action between the locking column 72 and the second groove 512 is stronger when the locking column 72 is positioned in the second groove 512, thereby enabling the locking column 72 to be stably positioned in the second groove 512. The outer periphery of the rotating member 5 is provided with a connecting surface 513 (see fig. 6) located between the first groove 511 and the second groove 512, and the connecting surface 513 is in smooth transition with the first groove 511 and in arc transition with the second groove 512, so that when the rotating member 5 rotates in the reverse direction, the locking column 72 can be disengaged from the first groove 511 without rotating the swing rod 7 in the forward direction, and can slide to the second groove 512 along the connecting surface 513, so that the locking column 72 can enter the second groove 512 from the first groove 511 more smoothly, and the operation of switching the locking column 72 from the first groove 511 to the second groove 512 is simplified.

The rotating member 5 in this embodiment includes a ring piece 51 provided with a first groove 511 and a second groove 512, and a connecting portion 52 (see fig. 6) protruding from one side of the outer peripheral wall of the ring piece 51, and the rear side of the connecting portion 52 is connected to the second wrenching member 9 (see fig. 3) so as to apply a force when the rotating member 5 is rotated; the front side of the connecting portion 52 is provided with a hook 521, and the hook 521 abuts against the second end 612 of the first torsion spring 61 (see fig. 3).

The frame 1 is provided with a cross beam 13 which is positioned above the cross rod 3 and is parallel to the cross rod 3, and the mounting seat 8 is sleeved on the cross rod 3 and fixed on the cross beam 13, so that the cross rod 3 is fixed on the cross beam 13 (see figure 1). The first end of the swing rod 7 is provided with a rotating shaft 71 parallel to the cross rod 3, the rotating shaft 71 is rotatably arranged at the lower part of the mounting seat 8 (see fig. 5), and the locking column 72 is arranged at the second end of the swing rod 7, so that the length of the swing rod 7 can be shortened to shorten the arm of force. The rotating shaft 71 is sleeved with the first trip part 2, so that force is applied when the rotating shaft 71 is rotated; the second torsion spring 62 is sleeved on the rotating shaft 71, and a first end of the second torsion spring 62 abuts against the mounting base 8 and a second end thereof abuts against the first trip member 2 (see fig. 2). The rotation member 5 is located between the first torsion spring 61 and the mounting seat 8 so as to shorten the moment arm of the first torsion spring 61 (see fig. 1 and 3).

As shown in fig. 3, a track frame 12 is disposed on a side wall of the vehicle frame 1, the track frame 12 is provided with a slide groove 121 facing the wheel center shaft 111, and the wheel center shaft 111 is provided with a slide post 112 capable of passing through the second end of the torsion arm 4 and sliding up and down along the slide groove 121, so as to limit the range of the up-and-down sliding of the wheel center shaft 111.

The working principle of the wheel shock absorbing structure in the embodiment is as follows:

when the wheel runs on a flat ground, the requirement on the shock absorption performance of the shock absorption structure of the wheel is low, the first torsion spring 61 enables the rotating piece 5 to always have the trend of rotating in the forward direction, and the second torsion spring 62 enables the swinging rod 7 to always have the trend of rotating in the reverse direction, so that the locking column 72 is kept in contact with the outer peripheral wall of the ring piece 51, and the locking column 72 is positioned in the first groove 511 (see fig. 2).

When the wheel runs on a rugged road surface, the requirement on the shock absorption and buffering performance of the wheel shock absorption structure is high, the second pulling piece 9 is pulled downwards, the second pulling piece 9 drives the rotating piece 5 to rotate in the reverse direction, at the moment, the locking column 72 is kept in contact with the outer peripheral wall of the ring piece 51 under the elastic action of the second torsion spring 62, the first groove 511 is smoothly connected with the connecting surface 513, so that the locking column 72 and the rotating piece 5 rotate relatively along the connecting surface 513 until entering the second groove 512, the locking column 72 is positioned in the second groove 512 (see fig. 4) through the cooperative matching of the first torsion spring 61 and the second torsion spring 62, the compression degree of the first torsion spring 61 is larger, and therefore, a larger elastic force can be provided for the torsion arm 4, and the shock absorption and buffering effects of the wheel shock absorption structure are better.

When the wheel returns to the flat ground again for running, because the depth of the second groove 512 is larger, even if the rotating member 5 rotates in the forward direction, the locking column 72 cannot be disengaged from the second groove 512, therefore, the first trip member 2 is tripped downward, so that the first trip member 2 drives the rotating member 5 to rotate in the forward direction, and the locking column 72 is thereby driven to disengage from the second groove 512 (see fig. 5), at this time, the first torsion spring 61 enables the rotating member 5 to rotate in the forward direction until the front side of the hook portion 521 abuts against the cross beam 13, and then the first trip member 2 is released, and the first trip member 2 can be reset under the action of the second torsion spring 62, so that the locking column 72 is positioned in the first groove 511 again (see fig. 2).

Directional terms such as "front," "rear," "upper," "lower," "left," "right," "side," "top," "bottom," and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the utility model, but are used herein for convenience of description only and are to be determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the present invention may be oriented in different directions, the directional terms are used for descriptive purposes and are not to be construed as limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity.

Claims (10)

1. A shock absorbing structure for a wheel comprises

The bicycle frame (1) is provided with a rotatable wheel (11) and a cross bar (3) parallel to a wheel central shaft (111);

the first end of the torque arm (4) is rotatably connected to the end part of the cross rod (3), and the second end of the torque arm is rotatably connected to one end, close to the frame (1), of the wheel center shaft (111);

the method is characterized in that: and also comprises

The rotating piece (5) is sleeved on the cross rod (3) in a circumferential rotating manner, and a first groove (511) and a second groove (512) are formed in the outer periphery of the rotating piece at intervals;

a first elastic element, the first end (611) of which acts on the torque arm (4) to keep the second end of the torque arm (4) always in the downward sliding trend, and the second end (612) of which acts on the rotating element (5) to make the rotating element (5) always have the trend of rotating in the forward direction;

the swing rod (7) is rotatably constrained with the cross rod (3), the rotating axis of the swing rod (7) is coincident with or parallel to the axis of the cross rod (3), a locking column (72) is arranged on the swing rod (7), the swing rod (7) rotates in the reverse direction until the locking column (72) is positioned in the first groove (511) or the second groove (512) to limit the relative position of the rotating piece (5) and the cross rod (3), and the swing rod (7) rotates in the forward direction until the locking column (72) is separated from the first groove (511) or the second groove (512) to allow the rotating piece (5) to rotate relative to the cross rod (3);

the second elastic piece enables the swing rod (7) to always have the tendency of rotating along the reverse direction.

2. The shock absorbing structure for vehicle wheels according to claim 1, wherein: in the forward direction, the first groove (511) is located at the rear side of the second groove (512), and the depth of the first groove (511) is smaller than that of the second groove (512).

3. The shock absorbing structure for vehicle wheels according to claim 2, wherein: the outer periphery of the rotating piece (5) is provided with a connecting surface (513) positioned between the first groove (511) and the second groove (512), and the connecting surface (513) is in smooth transition with the first groove (511) and in arc transition with the second groove (512).

4. The shock absorbing structure for vehicle wheels according to claim 1, wherein: the rotation axis of the swing rod (7) is parallel to the axis of the cross rod (3); be equipped with mount pad (8) on horizontal pole (3), the first end of pendulum rod (7) is equipped with and is on a parallel with pivot (71) of horizontal pole (3), pivot (71) are rotated and are located on mount pad (8), locking post (72) are located the second end of pendulum rod (7).

5. The shock absorbing structure for vehicle wheels according to claim 4, wherein: the first elastic piece is a first torsion spring (61) sleeved on the cross rod (3), and the rotating piece (5) is located between the first torsion spring (61) and the mounting seat (8).

6. The shock absorbing structure for vehicle wheels according to claim 4, wherein: the rotating shaft (71) is sleeved with a first pulling piece (2), the second elastic piece is sleeved on a second torsion spring (62) on the rotating shaft (71), a first end (621) of the second torsion spring (62) is abutted to the mounting seat (8), and a second end (622) is abutted to the first pulling piece (2).

7. The shock absorbing structure for vehicle wheels according to claim 6, wherein: the frame (1) is provided with a cross beam (13) which is positioned above the cross rod (3) and is parallel to the cross rod (3), the cross rod (3) is fixed on the cross beam (13) through the mounting seat (8), and the rotating shaft (71) is positioned at the lower part of the mounting seat (8).

8. A wheel suspension structure as defined in any one of claims 1-6, wherein: the rear side of the rotating part (5) is provided with a second trip part (9).

9. The shock absorbing structure for vehicle wheels according to claim 8, wherein: the rotating piece (5) comprises a ring piece (51) provided with a first groove (511) and a second groove (512), and a connecting part (52) convexly arranged on one side of the outer peripheral wall of the ring piece (51), the rear side of the connecting part (52) is connected with the second pulling piece (9), a hook part (521) is arranged on the front side of the connecting part (52), and the hook part (521) abuts against the second end (612) of the first elastic piece.

10. The shock absorbing structure for vehicle wheels according to claim 9, wherein: the frame (1) is provided with a cross beam (13) which is positioned above the cross rod (3) and is parallel to the cross rod (3), the locking column (72) is positioned in the first groove (511), and the front surface of the hook part (521) is abutted to the cross beam (13).

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