Quick dismounting device for front wheels of push-and-pull cart for children

Abstract

The utility model relates to the technical field of child push trailers, in particular to a child push trailer front wheel quick dismounting device which enables front wheels to be more convenient to dismount and mount, improves convenience and improves work efficiency when the front wheels are dismounted, maintained or replaced. Comprising a front fork, a bearing is fixedly arranged in the middle of a front wheel, the front wheel rotationally sleeves an axle through the bearing, two limiting rings are symmetrically and fixedly arranged on the axle and distributed on the two sides of the bearing, the inner sides of the two limiting rings make contact with the bearing, and the inner sides of two U-shaped limiting blocks make contact with the outer sides of the two limiting rings correspondingly. Transverse pin holes communicated with the vertical pin holes are formed in the lower portions of the two sides of the right end of the front fork, transverse positioning holes are formed in the two sets of vertical plug pins in a penetrating mode, the two sets of transverse plug pins penetrate through the two sets of transverse positioning holes respectively and are inserted into the transverse pin holes, the two sets of transverse plug pins are sleeved with springs respectively, and the two ends of the springs are fixedly connected with the transverse plug pins and the front fork respectively.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of children's push trolley, in particular to a front wheel quick dismounting device of children's push trolley. BACKGROUND

[0002] The children's push trolley is a kind of car for children on the market, and most of the children's push trolleys on the market are three-wheeled, i.e. one front wheel and two rear wheels, and the front wheel of the children's push trolley on the market is mostly installed on the front fork in a bolt-nut connection mode.

[0003] When the front wheel needs to be dismounted for maintenance or replacement, the bolt and the nut need to be repeatedly dismounted and mounted, so that the front wheel is inconvenient to dismount and mount, the convenience is poor, and the working efficiency during maintenance or replacement is affected. UTILITY MODEL CONTENTS

[0004] To solve the above technical problems, the utility model provides a front wheel quick dismounting device of children's push trolley, which can make the front wheel more convenient to dismount and mount, improve the convenience, and improve the working efficiency during dismounting, maintenance or replacement of the front wheel.

[0005] TECHNICAL SCHEME

[0006] To achieve the above object, the utility model provides the following technical scheme: a front wheel quick dismounting device of children's push trolley, which comprises a front fork, a front wheel assembly and a dismounting mechanism, the front wheel assembly comprises a front wheel and an axle, a bearing is fixedly arranged in the middle of the front wheel, the front wheel is rotatably sleeved on the axle through the bearing, two sets of limiting rings are symmetrically fixed on the axle, the two sets of limiting rings are distributed on both sides of the bearing, and the inner sides of the two sets of limiting rings are in contact with the bearing, U-shaped limiting blocks are fixedly arranged on both axles, vertical positioning holes are formed in the two sets of U-shaped limiting blocks, the inner sides of the two sets of U-shaped limiting blocks are respectively in contact with the outer sides of the two sets of limiting rings, U-shaped clamping grooves are arranged below both sides of the right end of the front fork, the axle is clamped on the front fork through the cooperation of the U-shaped limiting blocks and the U-shaped clamping grooves, the dismounting mechanism comprises two sets of vertical bolts and two sets of horizontal bolts, the two sets of vertical bolts are respectively inserted into the bottoms of both sides of the front fork, the two sets of horizontal bolts are respectively inserted into both sides of the right end of the front fork through the two sets of vertical bolts, for dismounting the axle, vertical pin holes are formed in the bottoms of both sides of the front fork and communicated with the U-shaped clamping grooves, horizontal pin holes are arranged below both sides of the right end of the front fork and communicated with the vertical pin holes, the two sets of horizontal pin holes are respectively perpendicular to the two sets of vertical pin holes, the two sets of vertical bolts are respectively inserted into the two sets of vertical positioning holes and the vertical pin holes, horizontal positioning holes are formed in the two sets of vertical bolts, the two sets of horizontal bolts are respectively inserted into the two sets of horizontal positioning holes and the horizontal pin holes, springs are sleeved on the two sets of horizontal bolts, and the two ends of the springs are respectively fixedly connected with the horizontal bolts and the front fork.

[0007] Preferably, the bottom end of the front fork on both sides is fixed with a positioning cylinder in communication with the vertical pin hole, and the two groups of positioning cylinders are integrated with the front fork.

[0008] Preferably, the bottom end of the front fork on both sides is fixed with a positioning cylinder in communication with the vertical pin hole, and the two groups of positioning cylinders are integrated with the front fork.

[0009] Preferably, the bottom end of the front fork on both sides is fixed with a positioning cylinder in communication with the vertical pin hole, and the two groups of positioning cylinders are integrated with the front fork.

[0010] Preferably, the bottom end of the front fork on both sides is fixed with a positioning cylinder in communication with the vertical pin hole, and the two groups of positioning cylinders are integrated with the front fork.

[0011] Compared with the prior art, the beneficial effects of the utility model are that: when installing, the wheel shaft is clamped into the two groups of U-shaped clamping grooves, the wheel shaft is limited through the cooperation of the U-shaped limiting block and the U-shaped clamping groove, the wheel shaft is prevented from rotating, the width of the U-shaped limiting block is same with the width of the U-shaped clamping groove, the outer side of the two groups of limiting rings is respectively abutted on the inner wall of the front fork on the front and back sides, the limiting ring plays the axial limiting action, so that the axial displacement does not occur, the vertical pin is inserted into the vertical pin hole through the vertical positioning hole, the U-shaped limiting block is limited, the U-shaped limiting block is prevented from separating, the horizontal pin is inserted into the horizontal pin hole through the horizontal positioning hole, the vertical pin is limited, the vertical pin is prevented from separating from the front fork and the U-shaped limiting block, the installation of the front wheel is realized, when disassembling, the horizontal pin on one side is pulled to the right, the horizontal pin is pulled out of the horizontal positioning hole, the spring is stretched, so that the limiting of the vertical pin is released, then the vertical pin on this side is pulled out of the vertical pin hole, the limiting of the vertical pin on the other side is released through pulling the horizontal pin on the other side, then the vertical pin on the other side is pulled out of the vertical pin hole, finally the front wheel is pulled from the right side of the front fork, the wheel shaft and the U-shaped limiting block are separated from the U-shaped clamping groove, so that the front wheel can be disassembled, so that the front wheel can be assembled and disassembled more conveniently, the convenience is improved, and the working efficiency is improved when the front wheel is disassembled, maintained or replaced. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the axonometric structure schematic diagram of the utility model;

[0013] Figure 2 It is the structure schematic diagram of the front wheel assembly in the utility model;

[0014] Figure 3 It is the axonometric structure schematic diagram of the front fork in the utility model;

[0015] Figure 4 It is the local axonometric section structure schematic diagram of the utility model;

[0016] Figure 5 It is the axonometric structure schematic diagram of the cooperation of the wheel shaft and the vertical pin in the utility model;

[0017] Figure 6 is the A place local amplification structure schematic diagram of the utility model;

[0018] Figure 7 is the shaft measurement structure schematic diagram of the vertical bolt in the utility model;

[0019] Marked in the drawing: 1, front fork;2, front wheel;3, bearing;4, axle;5, limit ring;6, U type limit block;7, U type clamping groove;8, positioning cylinder;9, vertical positioning hole;10, vertical bolt;11, vertical pin hole;12, horizontal bolt;13, horizontal positioning hole;14, horizontal pin hole;15, spring;16, pull ring;17, chamfer. DETAILED DESCRIPTION

[0020] The specific embodiments of the utility model are described in further detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but are not used to limit the scope of the utility model.

[0021] EXAMPLE

[0022] Please refer to Figures 1-7The utility model discloses a children's push trailer front wheel quick -detachable device, including the front fork 1, the bearing 3 is fixed in the middle of the front wheel 2, the front wheel 2 is rotatably sleeved on the wheel shaft 4 through the bearing 3, two sets of limiting rings 5 are fixed on the wheel shaft 4 symmetrically, two sets of limiting rings 5 are distributed on the both sides of bearing 3, and the inner side of two sets of limiting rings 5 is in contact with bearing 3, two sets of wheel shaft 4 are all fixed with U type limiting block 6, two sets of U type limiting block 6 are all through the vertical positioning hole 9, the inner side of two sets of U type limiting block 6 is in contact with the outer side of two sets of limiting rings 5 respectively, the lower of the both sides of the right end of front fork 1 is all equipped with U type clamping slot 7, the wheel shaft 4 is clamped on the front fork 1 through the cooperation of U type limiting block 6 and U type clamping slot 7, the bottom of the both sides of front fork 1 is respectively equipped with the vertical pin hole 11 that is linked with U type clamping slot 7, the lower of the both sides of the right end of front fork 1 is all equipped with the horizontal pin hole 14 that is linked with vertical pin hole 11, two sets of horizontal pin hole 14 are respectively perpendicular with two sets of vertical pin hole 11, two sets of vertical bolt 10 are respectively passed two sets of vertical positioning hole 9 and are inserted in vertical pin hole 11, two sets of vertical bolt 10 are all through the horizontal positioning hole 13, two sets of horizontal bolt 12 are respectively passed two sets of horizontal positioning hole 13 and are inserted in horizontal pin hole 14, two sets of horizontal bolt 12 are all sleeved with spring 15, and the both ends of spring 15 are fixedly connected with horizontal bolt 12 and front fork 1 respectively;When installing, the wheel shaft 4 is clamped into two sets of U type clamping slots 7, and the wheel shaft 4 is limited through the cooperation of U type limiting block 6 and U type clamping slot 7, prevent the wheel shaft 4 from rotating, and the width of U type limiting block 6 is same with the width of U type clamping slot 7, so that the outer side of two sets of limiting rings 5 is respectively abutted on the inner wall of the both sides of front fork 1, so that limiting ring 5 plays the axial limiting effect, so that the axial displacement condition will not appear, and the vertical bolt 10 is inserted into vertical pin hole 11 through vertical positioning hole 9, and the U type limiting block 6 is limited, to prevent U type limiting block 6 from separating, further, the vertical bolt 10 is limited through the horizontal bolt 12 inserted into horizontal pin hole 14 through horizontal positioning hole 13, to prevent the vertical bolt 10 from separating from front fork 1 and U type limiting block 6, realize the installation of front wheel 2, when disassembling, first pull the horizontal bolt 12 of one side to the right, make the horizontal bolt 12 from horizontal positioning hole 13 pull out, and spring 15 is stretched, so as to cancel the limiting of vertical bolt 10, and then the vertical bolt 10 of this side can be pulled out from vertical pin hole 11, and then the limiting of the vertical bolt 10 of the other side can be cancelled by pulling the horizontal bolt 12 of the other side, and then the vertical bolt 10 of the other side can be pulled out from vertical pin hole 11, and finally pull front wheel 2 from the right side of front fork 1, make the wheel shaft 4 and U type limiting block 6 separate from U type clamping slot 7, can tear down front wheel 2, so that the front wheel can be more convenient to disassemble, improve the convenience, improve the working efficiency when the front wheel is disassembled, repaired or replaced.

[0023] The fixing position cylinder 8 is fixed at the bottom end of the front fork 1 and communicates with the vertical pin hole 11, and the two groups of position cylinders 8 are integrated with the front fork 1; by arranging the position cylinder 8, the vertical pin 10 can abut against the bottom end of the position cylinder 8 after being inserted, so that the vertical pin 10 is more firmly inserted.

[0024] The pull ring 16 is arranged at the bottom end of the vertical pin 10 and the right end of the horizontal pin 12; by arranging the pull ring 16, the vertical pin 10 and the horizontal pin 12 are more convenient to be inserted and pulled out.

[0025] The chamfer 17 is arranged at the top edge of the vertical pin 10 and the left end edge of the horizontal pin 12; by arranging the chamfer 17, the vertical pin 10 and the horizontal pin 12 are more easily inserted.

[0026] The anti-skid lines are arranged on the outer surfaces of the four groups of pull rings 16; by arranging the anti-skid lines on the outer surfaces of the pull rings 16, the friction of the outer surfaces of the pull rings 16 is improved, so that the hands are not easy to slip when pulling the pull rings 16.

[0027] The working principle of the front wheel quick dismounting device of the children's push trailer is that, during installation, the wheel shaft 4 is clamped into the two groups of U-shaped clamping grooves 7, the wheel shaft 4 is limited by the cooperation of the U-shaped limiting blocks 6 and the U-shaped clamping grooves 7, the wheel shaft 4 is prevented from rotating, the width of the U-shaped limiting block 6 is the same as the width of the U-shaped clamping groove 7, the outer sides of the two groups of limiting rings 5 abut against the inner walls on the front and rear sides of the front fork 1 respectively, the limiting ring 5 plays an axial limiting role, so that axial displacement does not occur, the vertical pin 10 is inserted into the vertical pin hole 11 through the vertical positioning hole 9, the U-shaped limiting block 6 is limited, the U-shaped limiting block 6 is prevented from being separated, the vertical pin 10 is further limited by the horizontal pin 12 inserted into the horizontal pin hole 14 through the horizontal positioning hole 13, the vertical pin 10 is prevented from being separated from the front fork 1 and the U-shaped limiting block 6, the installation of the front wheel 2 is realized, during dismounting, the horizontal pin 12 on one side is pulled to the right, the horizontal pin 12 is pulled out of the horizontal positioning hole 13, the spring 15 is stretched, so that the limiting of the vertical pin 10 is released, then the vertical pin 10 on this side is pulled out of the vertical pin hole 11, the limiting of the vertical pin 10 on the other side is released by pulling the horizontal pin 12 on the other side, then the vertical pin 10 on the other side is pulled out of the vertical pin hole 11, finally, the front wheel 2 is pulled from the right side of the front fork 1, the wheel shaft 4 and the U-shaped limiting block 6 are separated from the U-shaped clamping groove 7, and the front wheel 2 can be dismounted.

[0028] The installation mode, connection mode or setting mode of the quick dismounting device for the front wheel of the child push trailer are common mechanical modes, and any mode that can achieve the beneficial effects can be implemented; the bearing of the quick dismounting device for the front wheel of the child push trailer is purchased on the market, and the technical personnel in the industry only need to install and operate according to the attached instruction manual.

[0029] The above is only the preferred embodiment of the utility model, and it should be pointed out that, for ordinary technical personnel in the technical field, several improvements and modifications can be made without departing from the technical principles of the utility model, and these improvements and modifications should also be regarded as the protection range of the utility model.

Claims

1. A quick release device for the front wheel of a child's buggy comprising a front fork (1) characterised in that, Front wheel assembly and dismounting mechanism The front wheel assembly comprises a front wheel (2) and an axle (4), the front wheel (2) is fixed with a bearing (3) in the middle, the front wheel (2) is rotatably sleeved on the axle (4) through the bearing (3), two sets of limiting rings (5) are symmetrically arranged on the axle (4), the two sets of limiting rings (5) are arranged on both sides of the bearing (3), and the inner sides of the two sets of limiting rings (5) are in contact with the bearing (3), a U-shaped limiting block (6) is fixed on each of the two axles (4), a vertical positioning hole (9) is formed in each of the two U-shaped limiting blocks (6), the inner sides of the two U-shaped limiting blocks (6) are respectively in contact with the outer sides of the two sets of limiting rings (5), and the lower sides of the right ends of the front fork (1) are provided with U-shaped clamping grooves (7), the axle (4) is clamped on the front fork (1) through the cooperation of the U-shaped limiting block (6) and the U-shaped clamping groove (7). The dismounting mechanism comprises two sets of vertical bolts (10) and two sets of horizontal bolts (12), the two sets of vertical bolts (10) are respectively inserted into the bottoms of the two sides of the front fork (1), and the two sets of horizontal bolts (12) are respectively inserted into the right ends of the two sides of the front fork (1) through the two sets of vertical bolts (10), so as to dismount the axle (4).

2. A quick release device for the front wheel of a child's push trolley as claimed in claim 1 wherein, The bottoms of the two sides of the front fork (1) are respectively provided with vertical pin holes (11) in communication with the U-shaped clamping grooves (7), the lower sides of the right ends of the front fork (1) are provided with horizontal pin holes (14) in communication with the vertical pin holes (11), the two sets of horizontal pin holes (14) are respectively perpendicular to the two sets of vertical pin holes (11), the two sets of vertical bolts (10) respectively pass through the two sets of vertical positioning holes (9) and are inserted into the vertical pin holes (11), the two sets of vertical bolts (10) are respectively provided with horizontal positioning holes (13) penetrating therethrough, the two sets of horizontal bolts (12) respectively pass through the two sets of horizontal positioning holes (13) and are inserted into the horizontal pin holes (14), and springs (15) are sleeved on the two sets of horizontal bolts (12).

3. A quick release device for the front wheel of a child's push trolley as claimed in claim 2 wherein, The bottoms of the two sides of the front fork (1) are respectively provided with vertical pin holes (11) in communication with the U-shaped clamping grooves (7), the lower sides of the right ends of the front fork (1) are provided with horizontal pin holes (14) in communication with the vertical pin holes (11), the two sets of horizontal pin holes (14) are respectively perpendicular to the two sets of vertical pin holes (11), the two sets of vertical bolts (10) respectively pass through the two sets of vertical positioning holes (9) and are inserted into the vertical pin holes (11), the two sets of vertical bolts (10) are respectively provided with horizontal positioning holes (13) penetrating therethrough, the two sets of horizontal bolts (12) respectively pass through the two sets of horizontal positioning holes (13) and are inserted into the horizontal pin holes (14), and springs (15) are sleeved on the two sets of horizontal bolts (12).

4. A quick release device for the front wheel of a child's push trolley as claimed in claim 3 wherein, The bottoms of the two sides of the front fork (1) are respectively provided with vertical pin holes (11) in communication with the U-shaped clamping grooves (7), the lower sides of the right ends of the front fork (1) are provided with horizontal pin holes (14) in communication with the vertical pin holes (11), the two sets of horizontal pin holes (14) are respectively perpendicular to the two sets of vertical pin holes (11), the two sets of vertical bolts (10) respectively pass through the two sets of vertical positioning holes (9) and are inserted into the vertical pin holes (11), the two sets of vertical bolts (10) are respectively provided with horizontal positioning holes (13) penetrating therethrough, the two sets of horizontal bolts (12) respectively pass through the two sets of horizontal positioning holes (13) and are inserted into the horizontal pin holes (14), and springs (15) are sleeved on the two sets of horizontal bolts (12).

5. A quick release device for the front wheel of a child's push trolley as claimed in claim 4 wherein, The outer surfaces of the four sets of pull rings (16) are respectively provided with anti-skid lines.

6. A quick release device for the front wheel of a child's push trolley as claimed in claim 5 wherein, The outer surfaces of the four sets of pull rings (16) are respectively provided with anti-skid lines.

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