CN214267740U - Wheel mechanism and baby carriage - Google Patents

Abstract

The application relates to the technical field of wheel connection, in particular to a wheel mechanism and a baby carrier. The stroller includes a wheel mechanism and a frame. The wheel mechanism comprises a wheel body and a connecting seat connected with the baby carriage, a connecting gap between the wheel body and the connecting seat is reduced to only the key connection between the wheel shaft and the bearing, the axial deviation between the wheel body and the wheel shaft is reduced, the axial deviation between the wheel body and the baby carriage is improved, and the service lives of the wheel body, the wheel shaft and the connecting seat are prolonged; the wheel mechanism of bassinet can reduce the gap between wheel body and the bassinet, reduces the axial deviation between shaft and the connecting seat, reduces to receive the aforesaid and need to bear the weight of the weight and the wearing and tearing problem appears, improves the stability and the safety of bassinet operation.

Description

Wheel mechanism and baby carriage

Technical Field

The application relates to the field of wheel connection technology, in particular to a wheel mechanism and a baby carrier.

Background

Mobile devices such as strollers or carts, trunks, wheelchairs and the like that require a person to exert force to move are often fitted with wheels for movement. The wheel body is rotatably arranged on the movable equipment body through the wheel shaft. In order to increase the rotation speed of the wheel body, a bearing for reducing the friction force between the wheel shaft and the wheel body is generally inserted into the wheel body; meanwhile, in order to maintain the wheel body, a detachable mounting mechanism is additionally arranged between the wheel shaft and the movable equipment.

To the above-mentioned correlation technique, the inventor thinks that the bearing adopts the cartridge mode to install in the wheel body, and there is certain grafting clearance between the wheel body, and the shaft can be dismantled and connect soon in the portable equipment body simultaneously, has certain clearance of connecing soon equally. Due to the influence of the insertion gap and the quick connection gap, when the wheel body drives the movable equipment to move, the coaxiality of the wheel body and the wheel shaft may deviate, so that the wheel body deviates from the wheel shaft, and the service life of the wheel body and the service life of a connecting structure between the wheel body and the movable equipment are influenced.

SUMMERY OF THE UTILITY MODEL

In order to improve the use deviation of wheel body and shaft, prolong wheel body and mobile device between connection structure's life, this application provides a wheel mechanism and bassinet.

In a first aspect, the present application provides a wheel mechanism, which adopts the following technical solution:

a wheel mechanism comprises a wheel body and a connecting seat for mounting the wheel body; the connecting seat is fixedly arranged on the movable equipment body; a wheel shaft is fixed on the wheel body; a bearing is fixed on the connecting seat, and a shaft channel for inserting the wheel shaft is arranged in the middle of the bearing; the wheel shaft and the bearing are in key connection.

Through adopting above-mentioned technical scheme, connecting seat fixed mounting is in the mobile device body, and the shaft is fixed in the wheel body, and consequently the connecting gap between wheel body and the mobile device body then reduces to the key-type connection between only shaft and the bearing, has reduced the axial deviation between wheel body and the shaft, has improved the axial deviation between wheel body and the mobile device body, has prolonged the life of wheel body, shaft and connecting seat.

Optionally, the peripheral surface of the wheel axle is provided with a plurality of key strips protruding outwards in the radial direction; and key grooves matched with the key bars are formed in the inner wall of the shaft channel.

Through adopting above-mentioned technical scheme, can make the shaft fast along the axial displacement of shaft path through keybar and keyway, realize pegging graft or breaking away from, and then can improve the efficiency that wheel body and shaft detached the connecting seat, convenient to use person selects from connecting seat plug wheel body according to the demand.

Optionally, a ring groove parallel to the rotation direction of the wheel shaft is arranged at one end of the wheel shaft away from the wheel body; the connecting seat is provided with an anti-drop block matched with the ring groove.

By adopting the technical scheme, when the wheel shaft is arranged on the shaft channel, the anti-falling block is matched and clamped in the annular groove, so that the wheel shaft can be limited to be separated from the shaft channel.

Optionally, the connecting seat is further provided with a wheel detaching assembly for driving the anti-falling block to separate from the annular groove; the outer diameter of the anti-falling block is matched with the groove width of the ring groove.

Through adopting above-mentioned technical scheme, can realize anticreep piece joint or break away from the annular through taking turns apart, help the operator to pull apart the shaft from the shaft path fast, reach the demand of demolising the wheel body.

Optionally, the connecting seat is provided with a wheel detaching groove for mounting the wheel detaching assembly; the wheel detaching groove is provided with a moving hole communicated with the shaft channel, and the anti-falling block can movably penetrate through the moving hole;

the wheel detaching assembly comprises a wheel detaching key and a wheel detaching elastic piece; one end of the wheel detaching key is hinged with one end of the anti-drop block, which is far away from the shaft channel, through a wheel detaching pin rod; the wheel disassembling pin rod can be arranged in the wheel disassembling groove in a sliding mode along the axial direction parallel to the moving hole; the wheel detaching elastic piece is connected between the wheel detaching key and the bottom of the wheel detaching groove and used for driving the wheel detaching key to drive the anti-falling block to move towards the bottom of the wheel detaching groove.

By adopting the technical scheme, when the wheel shaft is detached, the wheel detaching key is pressed towards the bottom direction of the wheel detaching groove, the axial direction of the wheel detaching pin rod is taken as an axis, and the anti-falling block is driven to be separated from the annular groove along the axial direction of the moving hole according to the lever principle; then force is applied to the wheel body along the axial direction of the wheel shaft, and the wheel shaft can be detached from the shaft channel.

When the wheel shaft is installed, the wheel detaching key is pressed towards the bottom direction of the wheel detaching groove, the axial direction of the wheel detaching pin rod is taken as an axis, and the anti-falling block is driven to be separated from the shaft channel along the axial direction of the moving hole according to the lever principle; then force is applied along the axial direction of the wheel shaft and away from the wheel body; then the wheel detaching key is released, and under the action of the wheel detaching elastic piece, the anti-disengagement block moves towards the shaft channel along the moving hole, so that the anti-disengagement block is clamped in the annular groove, and the connection and installation of the wheel mechanism can be completed.

Optionally, a brake assembly for braking the wheel body is mounted between the wheel body and the connecting seat.

Through adopting above-mentioned technical scheme, the rotation of wheel body can be restricted to the brake subassembly, is convenient for when need not using the wheel body to remove the mobile device body, and the safety in utilization of mobile device body under the improvement current state is braked to the wheel body.

Optionally, the brake assembly includes a first limiting member and a second limiting member; the first limiting part is arranged on the wheel body and rotates around the axial direction of the wheel shaft synchronously with the wheel body; the second limiting piece is arranged on the connecting seat; the first limiting piece and the second limiting piece are respectively a groove seat provided with a limiting hole, and the other one is an insertion block; the number of the limiting holes is multiple, and the inserting blocks are arranged corresponding to the limiting holes; the axial direction of the limiting hole is parallel to the axial direction of the wheel shaft; the connecting seat is provided with a telescopic assembly used for driving the second limiting piece to move along the axial direction of the wheel shaft and used for driving the limiting hole to be inserted into and separated from the inserting block.

Through adopting above-mentioned technical scheme, first restriction piece rotates along with the wheel is synchronous, and the second restriction piece is installed in the connecting seat, consequently can realize first restriction piece and second restriction piece static relatively when the inserted block is pegged graft in the restriction hole, and then the wheel produces the braking, improves the safety in utilization under the mobile device body quiescent condition, still can brake the wheel body when carrying out wheel mechanism and dismantle, the operator of being convenient for demolishs the wheel body.

Optionally, the connecting seat is provided with a through hole for the insertion block to move axially; the telescopic assembly is installed on one side, far away from the insertion block, of the through hole.

Through adopting above-mentioned technical scheme, the inserted block is controlled by flexible subassembly along axial displacement in the through-hole, improves the convenience of brake.

Optionally, the telescopic assembly comprises a telescopic piece and a moving piece; the telescopic piece is used for driving the insertion block to move towards the limiting hole, and the telescopic piece is positioned in the through hole; the moving piece is used for driving the inserting block to be separated from the limiting hole, one end of the moving piece is connected to the inserting block, and the other end of the moving piece penetrates through the telescopic piece and is exposed out of the through hole.

Through adopting above-mentioned technical scheme, during the braking wheel, the inserted block moves towards first restriction piece under the effect of extensible member, and along with the wheel body rotates to one of them restriction hole and corresponds with the inserted block, can make the inserted block peg graft in the restriction hole.

In a second aspect, the present application provides a stroller, which adopts the following technical solutions:

a stroller includes the wheel mechanism.

Through adopting above-mentioned technical scheme, the bassinet generally supplies the infant to use, promotes the bassinet by caregiver and drives the infant and remove, therefore the required weight of bearing of wheel body includes bassinet self weight and infant's weight, still can include the weight of the article of accomodating in the bassinet. In the process of pushing the baby carriage to move, the connecting structure between the wheel body and the baby carriage is continuously subjected to the load-bearing gravity, and further the gap between the wheel body and the baby carriage is likely to be gradually increased. Adopt above-mentioned wheel mechanism, can reduce the gap between wheel body and the bassinet, reduce the axial deviation between shaft and the connecting seat, reduce to receive the aforesaid and need to bear the weight of the weight and wear and tear the problem appear, improve the stability and the safety of bassinet operation, improve bassinet and wheel mechanism's life simultaneously.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the connecting gap between the wheel body and the movable equipment body is reduced to the condition that only the wheel shaft is in key connection with the bearing, so that the axial deviation between the wheel body and the wheel shaft is reduced, the axial deviation between the wheel body and the movable equipment body is improved, and the service lives of the wheel body, the wheel shaft and the connecting seat are prolonged;

2. the wheel mechanism of bassinet can reduce the gap between wheel body and the bassinet, reduces the axial deviation between shaft and the connecting seat, reduces to receive the aforesaid and need to bear the weight of the weight and the wearing and tearing problem appears, improves the stability and the safety of bassinet operation.

Drawings

FIG. 1 is a schematic view of the construction of the stroller of the present application;

FIG. 2 is an exploded view of the wheel mechanism of the present application;

FIG. 3 is a side view schematic of the wheel mechanism of the embodiment of the present application;

FIG. 4 is a sectional view taken along line A-A of FIG. 3, which mainly shows the connecting structure of the wheel body and the second limiting member;

FIG. 5 is an enlarged view of the portion C of FIG. 4, which mainly shows the structure of the wheel detaching assembly;

FIG. 6 is a schematic structural view of a wheel mechanism, a telescopic assembly and the like according to an embodiment of the present invention;

FIG. 7 is an enlarged view of the portion D in FIG. 6, which mainly shows the structure of the limiting hole, the insert block and the telescopic assembly in the braking state;

FIG. 8 is a schematic sectional view taken along the direction B-B in FIG. 3, which mainly shows the connection structure of the limiting hole, the insertion block and the telescopic assembly;

fig. 9 is an enlarged view of a portion E in fig. 8, and mainly shows the structure of the telescopic mechanism.

Description of reference numerals: 1. a wheel mechanism;

2. a wheel body; 21. a wheel axle; 22. a key bar; 23. a ring groove;

3. a connecting seat; 31. a bearing; 32. a shaft channel; 321. a keyway; 33. disassembling the wheel assembly; 331. detaching the wheel key; 332. disassembling the wheel spring piece; 333. disassembling the wheel pin rod; 34. an anti-drop block; 35. disassembling the wheel groove; 36. moving the hole; 37. a through hole; 38. a clamping hole;

4. a frame;

5. a brake assembly; 51. a slot seat; 511. a limiting aperture; 52. inserting a block; 521. a head portion; 522. a tail portion;

6. a telescoping assembly; 61. a telescoping member; 62. a moving member; 63. buckling a pipe; 631. a bump;

7. an operating mechanism; 71. an operation seat; 711. a piece penetrating groove; 712. a first stopper; 713. a second limiting block; 72. rotating the rod; 721. connecting holes; 722. an extension block; 73. rotating the control; 74. a manipulation cover; 75. a shaft rod.

Detailed Description

The present application is described in further detail below with reference to figures 1-9.

The embodiment of the application discloses a baby carriage.

Referring to fig. 1, a stroller comprises a wheel mechanism 1 and a frame 4, wherein the wheel mechanism 1 comprises a wheel body 2 and a connecting seat 3, and the wheel body 2 is detachably mounted on the connecting seat 3 through a wheel shaft 21.

Referring to fig. 2, the connecting base 3 is fixedly mounted at the lower portion of the frame 4, the bearing 31 is fixedly mounted in the connecting base 3, the bearing 31 has an axial channel 32 along the axial direction, a plurality of key slots 321 are formed in the inner wall of the axial channel 32, and the key slots 321 axially penetrate through one side of the bearing 31 close to the wheel along the axial channel 32. The outer periphery of the wheel shaft 21 is provided with a key strip 22 matched with the key groove 321, so that key connection is formed between the wheel shaft 21 and the shaft channel 32, and damage to the wheel shaft 21 caused by torque rotating along the axial direction of the wheel shaft 21 can be effectively reduced.

Referring to fig. 3 and 4, an end of the wheel shaft 21 away from the wheel body 2 is provided with a ring groove 23 parallel to the rotation direction of the wheel shaft 21. The shaft channel 32 is internally provided with a retaining block 34 clamped in the annular groove 23, and the retaining block 34 is used for limiting the wheel shaft 21 to be separated from the shaft channel 32. In this embodiment, a detaching assembly 33 is hinged to an end of the anti-falling block 3432 away from the axle 21, and the detaching assembly 33 is used for controlling the anti-falling block 34 to detach from the axle channel 32, so that the wheel body 2 can be coaxially mounted on the axle channel 32 or detached from the axle channel 32 through the axle 21. The anti-drop block 34 is clamped on the ring groove 23 and is positioned at the lower part of the wheel shaft 21, and can support the wheel shaft 21.

Referring to fig. 4 and 5, the connecting seat 3 is provided with a wheel detaching groove 35 having one side provided with the wheel detaching assembly 33, a notch of the wheel detaching groove 35 is located on the outer peripheral surface of the connecting seat 3, the wheel detaching groove 35 is provided with a moving hole 36 communicated with the shaft channel 32, and the anti-drop block 34 is movably disposed through the moving hole 36. The wheel detaching assembly 33 comprises a wheel detaching key 331 and a wheel detaching elastic piece 332; one end of the wheel detaching key 331 is hinged with one end of the anti-disengaging block 34 far away from the shaft path 32 through a wheel detaching pin rod 333, and the wheel detaching pin rod 333 can be mounted in the wheel detaching groove 35 in a sliding manner along the axial direction parallel to the moving hole 36; the wheel detaching elastic piece 332 is connected between the wheel detaching key 331 and the bottom of the wheel detaching groove 35, and is used for driving one side of the wheel detaching key 331, which is far away from the wheel detaching pin rod 333, to move towards the direction of the bottom of the wheel detaching groove 35, so as to drive the anti-disengaging block 34 to be clamped in the annular groove 23 of the wheel shaft 21. The wheel detaching elastic member 332 may be an elastic sheet fixed to the wheel detaching button 331, or may be a spring, and in this embodiment, the wheel detaching elastic member 332 is a spring.

Referring to fig. 6 and 7, a brake assembly 5 for braking the wheel body 2 is mounted between the wheel body 2 and the connecting seat 3. The brake assembly 5 includes a first limiting member and a second limiting member. In this embodiment, the first limiting member is a slot seat 51, and the second limiting member is an insertion block 52.

The groove seat 51 is arranged on the wheel body 2 and rotates synchronously with the wheel body 2 around the axial direction of the wheel shaft 21; the groove seat 51 can be connected with the wheel body 2 in a key connection mode; the slot 51 may also be integrally formed with the wheel body 2 and the wheel shaft 21 to form a fixed connection therebetween. The slot seat 51 is integrally formed with the wheel body 2, so that the clearance between the slot seat 51 and the wheel body 2 can be reduced, and the axial deviation can be reduced. One side of the slot seat 51 close to the connecting seat 3 is provided with a plurality of limiting holes 511 which uniformly surround the wheel shaft 21, and the axial direction of the limiting holes 511 is parallel to the axial direction of the wheel shaft 21. In this embodiment, there are at least two limiting holes 511, and the spacing between adjacent limiting holes 511 is equal. The limiting holes 511 are kidney-shaped holes, and the radial length center line of the limiting holes 511 intersects with the axial direction of the wheel axle 21, that is, all the kidney-shaped holes are fan-shaped and surround the wheel axle 21.

The insertion block 52 is matched with the limiting hole 511, can be inserted into the limiting hole 511, and can also be separated from the limiting hole 511. The number of the insertion blocks 52 is not more than the number of the limiting holes 511; when the number of the insertion blocks 52 is at least two, all the insertion blocks 52 are distributed around the axial direction of the shaft passage 32, and the spacing between the adjacent insertion blocks 52 is matched with the spacing between the adjacent limiting holes 511. In this embodiment, there is one insert block 52. The insert block 52 is a cylinder; the radial cross section of the limiting hole 511 is larger than that of the insertion block 52, so that the insertion block 52 can be inserted into the limiting hole 511 more conveniently.

Referring to fig. 8 and 9, the connecting seat 3 is provided with a through hole 37 for the insertion block 52 to move axially along the limiting hole 511, and the through hole 37 is provided with a telescopic assembly 6 for driving the insertion block 52 to be inserted into or separated from the limiting hole 511 at a side of the insertion block 52 away from the wheel body 2.

Referring to fig. 9, the insert 52 includes a head portion 521 matching the limiting hole 511 and a tail portion 522 connecting the head portion 521 at a side away from the limiting hole 511, and an outer diameter of the tail portion 522 is larger than an inner diameter of the limiting hole 511.

When the head 521 is engaged with the limiting hole 511, the tail 522 abuts against a side of the limiting hole 511 away from the wheel. The inner diameter of the through hole 37 is not smaller than the outer diameter of the tail 522, and the head 521 can be inserted into the limiting hole 511 through the through hole 37. The through hole 37 is a through hole. The side of the through hole 37 away from the head 521 is provided with a locking hole 38 along the radial direction.

The telescoping assembly 6 includes a telescoping member 61, a moving member 62 and a buckle tube 63. The buckle tube 63 is installed at one side of the through hole 37 far away from the insert block 52, and a projection 631 matching with the clamping hole 38 is arranged at one end of the buckle tube 63 near the insert block 52.

The telescopic member 61 is installed between the insertion block 52 and the buckle tube 63, in this embodiment, the telescopic member 61 is a push spring, and the outer diameter of the telescopic member 61 is not smaller than the inner diameter of the buckle tube 63. The moving member 62 is used to drive the head 521 of the inserting block 52 to move towards the tail 522 until the head 521 is separated from the limiting hole 511, in this example, the moving member 62 is a pull rope.

Referring to fig. 6, one end of the moving member 62 is fixedly connected to the inserting block 52, and the other end thereof passes through the telescopic member 61 and the buckle tube 63 in sequence and is connected to the operating mechanism 7.

Referring to fig. 6, the manipulation mechanism 7 includes a manipulation base 71, a rotation lever 72, a rotation control 73, and a manipulation cover 74. The control base 71 is fixedly mounted on the frame 4, and a fitting groove 711 is provided around the control base 71. The middle of the rotating rod 72 is hinged to the middle of the operating base 71 through a shaft lever 75, at least two sides of the rotating rod 72 are respectively provided with a connecting hole 721, and the connecting holes 721 and the hinged position of the rotating rod 72 hinged to the operating base 71 have a certain distance; one end of the moving member 62 far from the inserting block 52 passes through the penetrating member groove 711 and is connected to the moving member 62. One end of the rotating rod 72 extends to the peripheral wall of the control seat 71 and is fixedly connected with the rotating control member 73, and the rotating control member 73 is used for driving the rotating rod 72 to rotate around the shaft 75, so as to pull or release the moving member 62. The control cover 74 is detachably mounted on the control base 71, and is used for shielding the rotating rod 72 and one end of the moving member 62 connected to the rotating rod 72 in the control base 71, so as to have a protection effect.

Referring to fig. 6, in order to limit the rotation angle of the rotation control 73, the operation base 71 is further provided with a first stopper 712 and a second stopper 713, and the operation base 71 and the outer peripheral wall of the operation cover 74 have guide arc surfaces for facilitating the rotation of the rotation control 73 around the shaft 75. The first limiting block 712 is fixed on the outer side of the control seat 71, and one side of the rotation control member 73 close to the rotation rod 72 abuts against the outer peripheral surface of the control seat 71 or the control cover 74. The second stopper 713 is disposed inside the operating seat 71, an extending portion 722 extends from a portion of the rotating rod 72 close to the shaft 75 to one side, the extending portion 722 is inclined to the length direction of the rotating rod 72, and a side of the extending portion 722 far from the shaft 75 can abut against the second stopper 713.

In this example, the manipulation seat 71 has two penetrating grooves 711, and the two penetrating grooves 711 are symmetric about the axial direction of the shaft 75. The first stopper 712 is fixed to the outside of one of the through-member grooves 711, and the second stopper 713 is fixed to the inside of the other of the through-member grooves 711.

Referring to fig. 6 and 7, when the rotation control component 73 drives the rotation rod 72 and the moving component 62 to rotate from the first stopper 712 to the second stopper 713, the distance between the penetrating component groove 711 and the connecting hole 721 gradually increases, and the moving component 62 pulls the inserting block 52 to move towards the buckling pipe 63; when the extending block 722 abuts against the second stopper 713, the inserting block 52 is separated from the limiting hole 511, and the wheel body 2 is unlocked.

When the rotation control member 73 drives the rotation rod and the moving member 62 to move from the second stopper 713 to the first stopper 712, the connecting hole 721 gradually approaches the threading slot, and the moving member 62 is released; under the action of the telescopic member 61, the insert 52 moves away from the buckle tube 63 and abuts against one side of the groove seat 51 close to the second limiting member, and along with the rotation of the wheel body 2, the insert 52 is coaxial with one of the limiting holes 511, the head 521 is inserted into the limiting hole 511, and the wheel body 2 brakes to realize a braking effect.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. A wheel mechanism (1), characterized in that: comprises a wheel body (2) and a connecting seat (3) for mounting the wheel body (2); the connecting seat (3) is fixedly arranged on the movable equipment body; a wheel shaft (21) is fixed on the wheel body (2); a bearing (31) is fixed on the connecting seat (3), and a shaft channel (32) for inserting the wheel shaft (21) is arranged in the middle of the bearing (31); the wheel shaft (21) and the bearing (31) are in key connection.

2. The wheel mechanism of claim 1, wherein: the peripheral surface of the wheel shaft (21) is provided with a plurality of key strips (22) which protrude outwards in the radial direction; and key grooves (321) matched with the key bars (22) are formed in the inner wall of the shaft channel (32).

3. The wheel mechanism of claim 1, wherein: one end of the wheel shaft (21) far away from the wheel body (2) is provided with a ring groove (23) parallel to the rotation direction of the wheel shaft (21); the connecting seat (3) is provided with an anti-drop block (34) matched with the annular groove (23).

4. A wheel mechanism as claimed in claim 3, wherein: the connecting seat (3) is also provided with a wheel detaching assembly (33) for driving the anti-falling block (34) to separate from the annular groove (23); the outer diameter of the anti-falling block (34) is matched with the groove width of the ring groove (23).

5. The wheel mechanism of claim 4, wherein: the connecting seat (3) is provided with a wheel detaching groove (35) for mounting the wheel detaching assembly (33); the wheel detaching groove (35) is provided with a moving hole (36) communicated with the shaft channel (32), and the anti-falling block (34) can movably penetrate through the moving hole (36);

the wheel detaching assembly (33) comprises a wheel detaching key (331) and a wheel detaching elastic piece (332); one end of the wheel detaching key (331) is hinged with one end of the anti-drop block (34) far away from the shaft path (32) through a wheel detaching pin rod (333), and the wheel detaching pin rod (333) can be axially installed in the wheel detaching groove (35) in a sliding manner along a direction parallel to the moving hole (36); the wheel detaching elastic piece (332) is connected between the wheel detaching key (331) and the bottom of the wheel detaching groove (35) and used for driving the wheel detaching key (331) to drive the anti-falling block (34) to move towards the bottom of the wheel detaching groove (35).

6. The wheel mechanism of claim 1, wherein: and a brake component (5) for braking the wheel body (2) is arranged between the wheel body (2) and the connecting seat (3).

7. The wheel mechanism of claim 6, wherein: the brake assembly (5) comprises a first limiting piece and a second limiting piece; the first limiting piece is mounted on the wheel body (2) and rotates around the wheel shaft (21) axially and synchronously with the wheel body (2); the second limiting piece is mounted on the connecting seat (3); the first limiting piece and the second limiting piece are respectively a groove seat (51) provided with a limiting hole (511), and the other one is an inserting block (52); the number of the limiting holes (511) is multiple, and the inserting blocks (52) are arranged corresponding to the limiting holes (511); the axial direction of the limiting hole (511) is parallel to the axial direction of the wheel shaft (21); the connecting seat (3) is provided with a telescopic assembly (6) for driving the second limiting piece to move axially along the wheel shaft (21) and used for driving the limiting hole (511) and the inserting block (52) to realize insertion and separation.

8. The wheel mechanism of claim 7, wherein: the connecting seat (3) is provided with a through hole (37) for the axial movement of the inserting block (52); the telescopic assembly (6) is arranged on one side, far away from the insertion block (52), of the through hole (37).

9. The wheel mechanism of claim 8, wherein: the telescopic assembly (6) comprises a telescopic piece (61) and a moving piece (62); the telescopic piece (61) is used for driving the insert block (52) to move towards the limiting hole (511), and the telescopic piece (61) is positioned in the through hole (37); the moving piece (62) is used for driving the inserting block (52) to be separated from the limiting hole (511), one end of the moving piece (62) is connected to the inserting block (52), and the other end of the moving piece (62) penetrates through the telescopic piece (61) and is exposed out of the through hole (37).

10. A stroller, characterized in that: comprising a wheel unit (1) according to any of claims 1-9.

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