CN218431557U

CN218431557U - Bicycle for child exercise

Info

Publication number: CN218431557U
Application number: CN202221366432.0U
Authority: CN
Inventors: 陈娟; 曹宝林; 解中振; 王静; 朱广星
Original assignee: Tianjin Beijiaqi Technology Development Co ltd
Current assignee: Tianjin Beijiaqi Technology Development Co ltd
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2023-02-03
Anticipated expiration: 2032-06-01

Abstract

The utility model provides a child exercise bicycle, which comprises a frame main body, a front wheel, a driving mechanism and a rear wheel, wherein the left side and the right side of the joint of the rear wheel and the frame main body are provided with outer mounting covers through bolts; a positioning disc is welded on the side wall of the outer mounting cover far away from the rear wheel; a movable disc is arranged on one side of the positioning disc, which is far away from the outer mounting cover; one end of the auxiliary bracket is welded on one side wall of the movable disc, which is far away from the positioning disc; the other end of the auxiliary bracket is rotatably provided with an auxiliary wheel; the positioning plate and the movable plate bracket are provided with locking structures and positioning structures; the utility model discloses the dismouting of the auxiliary wheel of convenient and fast's realization more, through the utility model discloses, only need two steps can be quick the dismouting of completion auxiliary wheel, and need not use external instrument, improved the practicality greatly, give child more time carry out the bicycle exercise, help child faster study bicycle.

Description

Bicycle for child exercise

Technical Field

The utility model relates to a bicycle technical field especially relates to a child practices and uses bicycle.

Background

The children bicycle is suitable for 4-8 years old children to ride, the maximum saddle height is 435-635 mm, the bicycle is ridden by means of a driving mechanism acting on a rear wheel, the children bicycle has various wheel diameters with or without balance wheels and various styles, the children bicycle cannot be used for road riding, the children bicycle with the balance wheels can keep balance of a rider, therefore, a bicycle with the balance wheels is usually bought by parents for children to exercise riding the bicycle, the children initially use the bicycle with the auxiliary wheels for riding exercise, after learning for one end, the parents can help to detach the auxiliary wheels, and then the children exercise to keep balance independently without the help of the auxiliary wheels, so that the children finally learn to ride the bicycle;

among the prior art, the exercise bicycle that has auxiliary wheel for children uses, it is fixed with the auxiliary wheel through two nuts and a screw rod mostly, frame and wheel etc. after children accomplish the earlier stage exercise of bicycle through the auxiliary wheel, the head of a family needs dismantle the auxiliary wheel, so that children learn to ride the exercise under the condition that does not have the auxiliary wheel, but prior art is bigger with the fixed nut individuality of auxiliary wheel, and internal thread and screw rod area of contact is also big, its lateral wall is laminated with the connection face mutually tightly after the nut is screwed up, lead to can be more strenuous when the auxiliary wheel is dismantled because the problem of frictional force can be more, and need with the help of suitable instrument, just can accomplish the dismantlement, the circumstances in addition, when the auxiliary wheel is not dismantled in long-term use, because the nut exposes in the air can be difficult to avoid the tide to take place the corrosion, in addition and connect the frictional force between the face great, can be difficult to dismantle more.

Disclosure of Invention

According to the technical problem, the utility model provides a bicycle for child practice, which comprises a frame main body, a front wheel, a driving mechanism and a rear wheel, wherein the front wheel is arranged at the front side of the frame main body through a connecting shaft and a bolt; a rear wheel is arranged at the rear of the frame main body through a connecting shaft and a bolt; the bottom of the frame main body is provided with a driving mechanism for driving the rear wheel to rotate and advance; the method is characterized in that: the left side and the right side of the joint of the rear wheel and the frame main body are provided with outer mounting covers through bolts and are sealed through rubber rings; a positioning disc is welded on the side wall of the outer mounting cover far away from the rear wheel; a movable disc is arranged on one side of the positioning disc, which is far away from the outer mounting cover; one end of the auxiliary bracket is welded on one side wall of the movable disc, which is far away from the positioning disc; the other end of the auxiliary bracket is rotatably provided with an auxiliary wheel; the positioning plate and the movable plate bracket are provided with a locking structure and a positioning structure; the positioning plate is relatively locked and positioned with the movable plate through the locking structure and the positioning structure;

preferably, the positioning disc and the movable disc are both of a diamond structure; the positioning disc and the movable disc are the same in structure size;

preferably, the locking structure comprises a slide rail groove, an installation jack and an installation lug, and the inside of the positioning plate is provided with the slide rail groove; one end of the slide rail groove is provided with an installation jack; the side wall of the movable plate close to the positioning plate is correspondingly welded with an installation jack with an installation lug;

preferably, the number of the slide rail grooves is two; the slide rail groove is of a quarter arc structure; the mounting insertion hole is of a cylindrical hole-shaped structure; the two slide rail grooves and the two installation jacks are respectively in central symmetry by taking the center of the positioning disc as a symmetry point;

preferably, the number of the mounting lugs is two; the mounting lug comprises a sliding part and a locking part, and the left end and the right end of the sliding part are respectively welded with the locking part and the sliding disc; the sliding part and the locking part are both cylindrical structures; the diameter of the sliding part is the same as the groove width of the sliding rail groove; the diameter of the locking part is the same as that of the mounting insertion hole; the length of the sliding part is the same as the thickness of the positioning disc;

preferably, the positioning structure comprises a positioning box, a spring, a positioning pin, a threaded sleeve and a butterfly bolt, a through hole is formed in the positioning disc, and the positioning box is welded in the through hole; the opening end of the positioning box is flush with the side wall of the positioning disc close to the movable disc; the number of the positioning boxes is two; one end of a spring is welded at the bottom of the inner part of each of the two positioning boxes; the other end of the spring is welded with a positioning pin; a mounting hole is formed in the movable disc, and a threaded sleeve is welded in the mounting hole; the number of the threaded sleeves is two; one end of the threaded sleeve close to the positioning disc is flush with the side wall of the movable disc close to the positioning disc; the interior of the threaded sleeve is connected with a butterfly bolt through threads;

preferably, the outer diameter of the positioning pin is the same as the inner diameter of the threaded sleeve;

preferably, the length of the threaded shank portion of the thumb screw is the same as the length of the threaded sleeve.

The utility model has the advantages that:

the utility model adds the locking structure and the positioning structure, thereby achieving the purpose that a user can conveniently and quickly take off the auxiliary support with the auxiliary wheel, when the utility model is used, the user only needs to rotate the butterfly bolt inwards by hands when the auxiliary support needs to be removed, the threaded rod part of the butterfly bolt completely enters the threaded sleeve, and the shoe-shaped bolt can completely prop the positioning pin away from the threaded sleeve because the threaded rod part of the threaded sleeve and the butterfly bolt are the same in length, then parents only need to hold the auxiliary support and directly rotate clockwise, the sliding part of the mounting lug can slide along the slide rail groove at the moment to drive the locking part to simultaneously move, when the locking part reaches the mounting jack, the user only needs to apply tension force because the diameters of the mounting jack and the locking part are the same, the locking part can be drawn out from the inside of the mounting jack to achieve the purpose of separating the positioning disk from the movable disk, so that the auxiliary support can be taken down from the two sides of the rear wheel, when the auxiliary support and the auxiliary wheel need to be mounted again, a user only needs to directly insert the positioning lug on the movable disk into the mounting jack, and because the length of the sliding part is equal to the thickness of the positioning disk, the user can rotate anticlockwise to enable the sliding part to enter the sliding rail groove, the locking part also limits the extraction of the positioning disk, in the process, the positioning pin can be pressed into the positioning box by the movable disk, the spring is also compressed, before the user needs to rotate the butterfly bolt out of a part to enable the threaded sleeve to reserve the insertion space of the positioning pin, in the process of anticlockwise rotation, when the positioning pin reaches the position of the threaded sleeve, under the action of the spring, the positioning pin is bounced into the threaded sleeve, and the auxiliary support is installed at the moment; the utility model discloses a such mode, the dismouting of the auxiliary wheel of convenient and fast's realization more, through the utility model discloses, only need two steps can be quick the dismouting of completion auxiliary wheel, and need not use external instrument, improved the practicality greatly, give child more time to carry out the bicycle exercise, help child faster study bicycle.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the mounting of the left and right sides of the rear wheel and the outer mounting cover of the present invention;

FIG. 3 is a schematic view of the rear wheel of the present invention after the auxiliary wheel is installed;

fig. 4 is a schematic view of the installation of the positioning plate and the movable plate of the present invention;

FIG. 5 is a schematic plan view of the movable plate of the present invention;

fig. 6 is a schematic view of the overall structure of the positioning plate of the present invention;

fig. 7 is a schematic view of the overall structure of the movable plate of the present invention.

As shown in the figure: 1-a frame main body, 11-a front wheel, 12-a driving mechanism, 13-a rear wheel, 2-an outer mounting cover, 3-a positioning disc, 31-a positioning box, 32-a spring, 33-a positioning pin, 34-a slide rail groove, 35-a mounting jack, 4-a movable disc, 40-a mounting lug, 41-a sliding part, 42-a locking part, 43-a threaded sleeve, 44-a butterfly bolt, 5-an auxiliary bracket and 51-an auxiliary wheel.

Detailed Description

The utility model provides a bicycle for child practice, which comprises a frame main body 1, a front wheel 11, a driving mechanism 12 and a rear wheel 13, wherein the front side of the frame main body 1 is provided with the front wheel 11 through a connecting shaft and a bolt; a rear wheel 13 is arranged at the rear of the frame main body 1 through a connecting shaft and a bolt; the bottom of the frame body 1 is provided with a driving mechanism 12 for driving a rear wheel 13 to rotate and advance; the method is characterized in that: the left side and the right side of the joint of the rear wheel 13 and the frame body 1 are provided with outer mounting covers 2 through bolts and are sealed through rubber rings; the side wall of the outer mounting cover 2 far away from the rear wheel 13 is welded with a positioning disc 3; a movable disc 4 is arranged on one side of the positioning disc 3 far away from the outer mounting cover 2; one end of an auxiliary bracket 5 is welded on one side wall of the movable disc 4 far away from the positioning disc 3; the other end of the auxiliary bracket 5 is rotatably provided with an auxiliary wheel 51; the positioning plate 3 and the movable plate 4 are provided with a locking structure and a positioning structure; the positioning plate 3 is locked and positioned with the movable plate 4 relatively through a locking structure and a positioning structure;

in an alternative embodiment, the positioning plate 3 and the movable plate 4 are both diamond-shaped; the positioning disc 3 and the movable disc 4 have the same structure and size;

in an alternative embodiment, the locking structure includes a slide rail groove 34, a mounting socket 35, and a mounting protrusion 40, the slide rail groove 34 is opened inside the positioning plate 3; one end of the slide rail groove 34 is provided with an installation jack 35; the side wall of the movable plate 4 close to the positioning plate 3 is welded with a mounting lug 40 corresponding to the mounting jack 35;

in an alternative embodiment, the number of the slide rail grooves 34 is two; the slide rail groove 34 is of a quarter-arc structure; the mounting insertion hole 35 is a cylindrical hole-shaped structure; the two slide rail grooves 34 and the two installation jacks 35 are respectively in central symmetry by taking the center of the positioning disc 3 as a symmetry point;

in an alternative embodiment, the number of mounting lugs 40 is two; the mounting projection 40 includes a sliding part 41 and a locking part 42, and the left and right ends of the sliding part 41 are respectively welded with the locking part 42 and the sliding disk; the sliding portion 41 and the locking portion 42 are both cylindrical structures; the diameter of the sliding portion 41 is the same as the groove width of the rail groove 34; the diameter of the locking portion 42 is the same as that of the mounting insertion hole 35; the length of the sliding part 41 is the same as the thickness of the positioning plate 3;

in an optional embodiment, the positioning structure includes a positioning box 31, a spring 32, a positioning pin 33, a threaded sleeve 43, and a butterfly bolt 44, a through hole is opened inside the positioning plate 3, and the positioning box 31 is welded inside the through hole; the opening end of the positioning box 31 is flush with the side wall of the positioning plate 3 close to the movable plate 4; the number of the positioning boxes 31 is two; one end of a spring 32 is welded at the bottom of the inner part of the two positioning boxes 31; the other end of the spring 32 is welded with a positioning pin 33; a mounting hole is formed in the movable disc 4, and a threaded sleeve 43 is welded in the mounting hole; the number of the threaded sleeves 43 is two; one end of the threaded sleeve 43 close to the positioning disc 3 is flush with the side wall of the movable disc 4 close to the positioning disc 3; a butterfly bolt 44 is connected to the inside of the threaded sleeve 43 through threads;

in an alternative embodiment, the outer diameter of the locating pin 33 is the same as the inner diameter of the threaded sleeve 43;

in an alternative embodiment, the threaded shank portion of the thumb screw 44 is the same length as the threaded sleeve 43.

The operation principle is as follows:

when the utility model is used, when the user needs to remove the auxiliary support 5, the user only needs to rotate the butterfly bolt 44 inwards by hand, so that the threaded rod part of the butterfly bolt 44 completely enters the inside of the threaded sleeve 43, and because the threaded sleeve 43 is the same as the threaded rod part of the butterfly bolt 44 in length, the shoe-shaped bolt can completely prop the positioning pin 33 away from the threaded sleeve 43, and then the parents only need to hold the auxiliary support 5 and directly rotate clockwise, at the moment, the sliding part 41 of the mounting lug 40 can slide along the sliding rail groove 34 to drive the locking part 42 to move simultaneously, when the locking part 42 reaches the mounting insertion hole 35, because the diameters of the mounting insertion hole 35 and the locking part 42 are the same, at the moment, the user only needs to apply pulling force to draw the locking part 42 out from the inside of the mounting insertion hole 35, so as to achieve the purpose of separating the positioning disc 3 from the movable disc 4, thus, the auxiliary bracket 5 can be removed from the two sides of the rear wheel 13, when the auxiliary bracket 5 and the auxiliary wheel 51 need to be installed again, the user only needs to insert the positioning lug on the movable plate 4 directly into the installation insertion hole 35, and because the length of the sliding part 41 is equal to the thickness of the positioning plate 3, the user can rotate the auxiliary bracket 5 counterclockwise to make the sliding part 41 enter the sliding rail groove 34, at this time, the locking part 42 also restricts the positioning plate 3 from being pulled out, in this process, the positioning pin 33 will be pressed into the positioning box 31 by the movable plate 4, at this time, the spring 32 will also be compressed, before that, the user needs to unscrew the butterfly bolt 44 to a part to make the threaded sleeve 43 reserve the insertion space of the positioning pin 33, at this time, in the process of counterclockwise rotation, when the positioning pin 33 reaches the position of the threaded sleeve 43, under the action of the spring 32, the positioning pin 33 is ejected into the threaded sleeve 43, at which time the mounting of the auxiliary stand 5 is completed.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. The utility model discloses each part that mentions is the common technique in prior art, and the technical personnel of this trade should understand, the utility model discloses do not receive the restriction of above-mentioned embodiment, the description only is the explanation in above-mentioned embodiment and the description the principle of the utility model, under the prerequisite that does not deviate from the spirit and the scope of the utility model, the utility model discloses still can have various changes and improvement, these changes and improvement all fall into the protection of claim the utility model is within the scope. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A bicycle for child practice comprises a bicycle frame main body (1), a front wheel (11), a driving mechanism (12) and a rear wheel (13), wherein the front side of the bicycle frame main body (1) is provided with the front wheel (11) through a connecting shaft and a bolt; a rear wheel (13) is arranged at the rear of the frame main body (1) through a connecting shaft and a bolt; the bottom of the frame main body (1) is provided with a driving mechanism (12) for driving a rear wheel (13) to rotate and advance; the method is characterized in that: the left side and the right side of the joint of the rear wheel (13) and the frame main body (1) are provided with outer mounting covers (2) through bolts and are sealed through rubber rings; the side wall of the outer mounting cover (2) far away from the rear wheel (13) is welded with a positioning disc (3); a movable disc (4) is arranged on one side of the positioning disc (3) far away from the outer mounting cover (2); one end of an auxiliary support (5) is welded on one side wall of the movable plate (4) far away from the positioning plate (3); the other end of the auxiliary bracket (5) is rotatably provided with an auxiliary wheel (51); the positioning plate (3) and the movable plate (4) are provided with a locking structure and a positioning structure; the positioning disc (3) is locked and positioned relatively to the movable disc (4) through the locking structure and the positioning structure.

2. A child's exercise bicycle according to claim 1, wherein the positioning plate (3) and the movable plate (4) are both of a diamond structure; the positioning disc (3) and the movable disc (4) are the same in structure and size.

3. The bicycle for child exercise according to claim 1, wherein the locking structure comprises a slide rail groove (34), an installation insertion hole (35) and an installation convex block (40), and the inside of the positioning plate (3) is provided with the slide rail groove (34); one end of the slide rail groove (34) is provided with an installation jack (35); the side wall of the movable disc (4) close to the positioning disc (3) is welded with a mounting convex block (40) corresponding to the mounting jack (35).

4. A child's exercise bicycle according to claim 3, wherein the number of the slide rail grooves (34) is two; the slide rail groove (34) is of a quarter arc structure; the mounting insertion hole (35) is of a cylindrical hole-shaped structure; the two slide rail grooves (34) and the two installation insertion holes (35) are in central symmetry respectively by taking the center of the positioning disc (3) as a symmetry point.

5. The bicycle for child exercise according to claim 4, wherein the number of the mounting projections (40) is two; the mounting lug (40) comprises a sliding part (41) and a locking part (42), and the left end and the right end of the sliding part (41) are respectively welded with the locking part (42) and the sliding disc; the sliding part (41) and the locking part (42) are both cylindrical structures; the diameter of the sliding part (41) is the same as the width of the sliding rail groove (34); the diameter of the locking portion (42) is the same as the diameter of the mounting insertion hole (35); the length of the sliding part (41) is the same as the thickness of the positioning disc (3).

6. The bicycle for the child exercise according to claim 1, wherein the positioning structure comprises a positioning box (31), a spring (32), a positioning pin (33), a threaded sleeve (43) and a butterfly bolt (44), a through hole is formed in the positioning plate (3), and the positioning box (31) is welded in the through hole; the opening end of the positioning box (31) is flush with the side wall of the positioning disc (3) close to the movable disc (4); the number of the positioning boxes (31) is two; one end of a spring (32) is welded at the bottom of the inner part of each positioning box (31); the other end of the spring (32) is welded with a positioning pin (33); a mounting hole is formed in the movable disc (4), and a threaded sleeve (43) is welded in the mounting hole; the number of the threaded sleeves (43) is two; one end of the threaded sleeve (43) close to the positioning disc (3) is flush with the side wall of the movable disc (4) close to the positioning disc (3); the interior of the threaded sleeve (43) is connected with a butterfly bolt (44) through threads.

7. A bicycle for child exercising according to claim 6, wherein the outer diameter of the positioning pin (33) is the same as the inner diameter of the threaded sleeve (43).

8. A child's exercise bicycle according to claim 7, wherein the length of the threaded shaft portion of the wing bolt (44) is the same as the length of the threaded sleeve (43).