CN215553500U - Front wheel anti-swing structure and children's handcart - Google Patents
Front wheel anti-swing structure and children's handcart Download PDFInfo
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- CN215553500U CN215553500U CN202121483012.6U CN202121483012U CN215553500U CN 215553500 U CN215553500 U CN 215553500U CN 202121483012 U CN202121483012 U CN 202121483012U CN 215553500 U CN215553500 U CN 215553500U
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Abstract
The utility model discloses a front wheel anti-swing structure, which comprises a front wheel shaft and a front wheel frame, wherein the front wheel shaft is inserted into the front wheel frame, the front wheel shaft limits axial displacement between the front wheel frame and the front wheel frame through a locking structure, the front wheel shaft is rotationally connected with the front wheel frame, a gap exists between the front wheel frame and the front wheel frame, an anti-swing part is arranged between the front wheel frame and the front wheel shaft, the anti-swing part is symmetrically arranged along the axis of the front wheel shaft and is extruded between the front wheel frame and the front wheel shaft along the radial direction, and the contact surface of the anti-swing part is in contact with the lateral outer surface of the front wheel shaft so as to reduce deflection of the front wheel shaft. The utility model also discloses a baby trolley. In the utility model, the anti-swing piece is extruded between the front wheel shaft and the front wheel frame, so that the anti-swing piece is contacted with the front wheel shaft, the transverse displacement between the front wheel shaft and the front wheel frame is limited, the swing of the front wheel shaft caused by a gap between the front wheel shaft and the front wheel frame is effectively prevented, and the deformation probability is reduced.
Description
Technical Field
The utility model relates to the technical field of children wheelbarrows, in particular to a front wheel anti-swing structure and a children wheelbarrow.
Background
The existing stroller includes a front wheel assembly connected to a front wheel shaft, a front wheel shaft inserted into the front wheel frame and rotatably connected to the front wheel frame, and a front wheel frame. Because of reasons such as precision or assembly, certain radial gap can exist between front wheel axle and the front wheel frame to make in the use, certain swing can take place for the front wheel subassembly, and like this time, can cause front wheel axle itself to take place to warp, influence life, therefore need carry out certain improvement.
Therefore, there is a need for a front wheel anti-swing structure and a stroller that prevents the front wheel assembly from swinging.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides a front wheel anti-swing structure for preventing a front wheel assembly from swinging and a child handcart.
The technical scheme of the utility model provides a front wheel anti-swing structure which comprises a front wheel shaft and a front wheel frame, wherein the front wheel shaft is inserted into the front wheel frame, the front wheel shaft limits axial displacement between the front wheel frame and the front wheel frame through a locking structure, the front wheel shaft is rotationally connected with the front wheel frame, a gap exists between the front wheel frame and the front wheel frame, an anti-swing part is arranged between the front wheel frame and the front wheel shaft, the anti-swing part is symmetrically arranged along the axis of the front wheel shaft and is extruded between the front wheel frame and the front wheel shaft along the radial direction, and the contact surface of the anti-swing part is in contact with the lateral outer surface of the front wheel shaft so as to reduce deflection of the front wheel shaft.
Furthermore, the contact surface of the swing-proof part and the front wheel shaft is provided with a dustproof bulge and a dustproof groove.
Furthermore, the front wheel carrier comprises fixing frames, the anti-swing part is installed in the fixing frames, the two fixing frames are symmetrically arranged along the axis of the front wheel shaft, and the fixing frames are in clearance fit with the front wheel shaft.
Further, the two fixing frames are connected through fixing pins.
Furthermore, the front wheel carrier further comprises a connecting support, the fixing frame is fixedly connected with the connecting support, the connecting support is used for being detachably connected with a front wheel assembly of the three-wheel trolley, and the front wheel shaft is inserted into the connecting support and is in clearance fit with the connecting support.
Further, the anti-sway article is made of a wear-resistant elastically deformable material.
Further, the anti-swing member includes a compensation structure, and when a contact surface of the anti-swing member with the front wheel axle is worn, the compensation structure pushes the anti-swing member toward the front wheel axle to keep the anti-swing member in contact with the front wheel axle.
Further, the compensation structure is a spring and is arranged between the front wheel frame and the anti-swing piece, and when the anti-swing piece is worn, the spring pushes the anti-swing piece to keep in contact with the front wheel shaft.
Further, the compensation structure is a hollow part positioned inside the anti-swing part; during initial installation, the solid part of the anti-swing part deforms and extrudes towards the hollow part; when the anti-sway member is worn, the hollow portion increases in a direction toward the solid portion to cause the solid portion to at least partially return to a deformed shape and to cause the anti-sway member to continue to contact the front axle.
The utility model also provides a child handcart which comprises the front wheel anti-swing structure, wherein the child handcart comprises a handcart frame and a plurality of wheel assemblies, the wheel assemblies at least comprise one front wheel, the front wheel is provided with the front wheel anti-swing structure, and the front wheel frame is fixed on the front side of the handcart frame.
After adopting above-mentioned technical scheme, have following beneficial effect:
(1) in the utility model, the anti-swing piece is extruded between the front wheel axle and the front wheel frame, so that the anti-swing piece is contacted with the front wheel axle, the transverse displacement between the front wheel axle and the front wheel frame is limited, the swing of the front wheel axle caused by a gap between the front wheel axle and the front wheel frame is effectively prevented, and the deformation probability is reduced;
(2) the dustproof bulge can scrape sundries such as dust and particles stuck on the front axle, and the scraped sundries are discharged to the outside through the dustproof groove, so that the shaft part is effectively protected, and the abrasion is reduced.
Drawings
The disclosure of the present invention will become more readily understood by reference to the drawings. It should be understood that: these drawings are for illustrative purposes only and are not intended to limit the scope of the present disclosure. In the figure:
FIG. 1 is a partial schematic view of a front wheel anti-swing structure mounted to a three-wheeled hand truck in accordance with one embodiment of the present invention;
FIG. 2 is a perspective view of a front wheel anti-swing structure according to a first embodiment of the present invention;
FIG. 3 is an exploded view of a front wheel anti-swing structure in accordance with one embodiment of the present invention;
FIG. 4 is an axial cross-sectional view of a front wheel anti-swing structure in accordance with one embodiment of the present invention;
FIG. 5 is an exploded view of a front wheel anti-swing structure in accordance with a second embodiment of the present invention;
FIG. 6 is an exploded view of the front wheel anti-swing structure according to another perspective in the second embodiment of the present invention;
FIG. 7 is a radial cross-sectional view of a front wheel anti-swing structure in a second embodiment of the present invention;
FIG. 8 is a perspective view of a front wheel anti-swing structure in a second embodiment of the present invention;
fig. 9 is an exploded view of a front wheel anti-swing structure in a third embodiment of the present invention;
fig. 10 is an exploded view from another perspective of the anti-swing structure for the front wheel in the third embodiment of the present invention;
FIG. 11 is a perspective view of a third embodiment of the utility model;
fig. 12 is a radial sectional view of a front wheel anti-swing structure in a third embodiment of the present invention.
Reference symbol comparison table:
a front wheel anti-swing structure 10, a front wheel assembly 20, a front fork 30;
a front wheel axle 1;
the front wheel frame 2: the fixing frame 21, the connecting bracket 22, the jack 221 and the fixing pin 23;
a locking structure 3;
and (4) preventing the ornament: compensation structure 41, solid portion 42, dust-proof protrusion 43, dust-proof groove 44, positioning protrusion 45.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings.
It is easily understood that according to the technical solution of the present invention, those skilled in the art can substitute various structures and implementation manners without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are only exemplary illustrations of the technical solutions of the present invention, and should not be construed as being all of the present invention or as defining or limiting the technical solutions of the present invention.
The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.
In some embodiments of the present invention, a front wheel swing preventing structure 10 for a three-wheeled stroller includes a front wheel axle 1 and a front wheel frame 2, the front wheel axle 1 is inserted into the front wheel frame 2, the front wheel axle 1 is limited by a locking structure 3 to be axially displaced from the front wheel frame 2, the front wheel axle 1 is rotatably connected to the front wheel frame 2 with a gap in front of the front wheel frame and the front wheel frame, a swing preventing member 4 is disposed between the front wheel frame 2 and the front wheel axle 1, the swing preventing member 4 is symmetrically disposed along an axis of the front wheel axle 1 and radially compressed between the front wheel frame 2 and the front wheel axle 1, and a contact surface of the swing preventing member 4 contacts with a lateral outer surface of the front wheel axle 1 to reduce the swing of the front wheel axle 1.
In the present invention, the "axial direction" refers to the vertical direction in fig. 4, and the "radial direction" refers to the horizontal direction in fig. 4.
Specifically, as shown in fig. 1, the stroller includes a front wheel swing preventing structure 10, a wheel assembly 20, and a stroller frame 30, the front wheel swing preventing structure 10 is connected between the stroller frame 30 and the wheel assembly 20, and the wheel assembly 20 is rotated relative to the stroller frame 30 by the front wheel swing preventing structure 10. As shown in fig. 2, the front wheel anti-swing structure 10 includes a front wheel shaft 1 and a front wheel frame 2, one end of the front wheel shaft 1 is inserted into the front wheel frame 2 and is rotatably connected with the front wheel frame 2, and the locking structure 3 limits axial displacement between the front wheel shaft 1 and the front wheel frame 2 so that the two cannot be separated in the axial direction. The front wheel axle 1 is fixedly connected with the front wheel assembly 20, and the front wheel assembly 20 and the front wheel axle 1 rotate together relative to the front wheel frame 2.
As shown in fig. 3-4, the anti-swing part 4 is disposed between the front wheel frame 2 and the front wheel axle 1, and the anti-swing part 4 is symmetrically disposed along the axis of the front wheel axle 1 and is radially compressed between the front wheel frame 2 and the front wheel axle 1.
Because the anti-swing part 4 is extruded between the front wheel shaft 1 and the front wheel frame 2, the anti-swing part 4 is in contact with the front wheel shaft 1, the transverse displacement between the front wheel shaft 1 and the front wheel frame 2 is limited, the swinging of the front wheel shaft caused by a gap between the front wheel shaft and the front wheel frame is effectively prevented, and the deformation probability is reduced.
In some embodiments of the present invention, the anti-swing member 4 includes a compensation structure 41, and when the contact surface of the anti-swing member 4 with the front wheel axle 1 is worn, the compensation structure 41 pushes the anti-swing member 4 toward the front wheel axle 1 to keep the anti-swing member 4 in contact with the front wheel axle 1.
The compensation structure 41 pushes the anti-swing part 4 toward the front wheel axle 1 when the anti-swing part 4 is worn by a certain amount, so that the anti-swing part 4 keeps contacting with the front wheel axle 1, and the front wheel axle is prevented from swinging due to a gap between the front wheel axle and the front wheel frame.
Alternatively, as shown in fig. 5, the compensation structure 41 is a spring, which is disposed between the front wheel frame 2 and the anti-swing member 4, and pushes the anti-swing member 4 to continue to be in contact with the front wheel axle 1 when the anti-swing member 4 is worn.
At initial installation, the spring is compressed between the anti-sway 4 and the front wheel carrier 2, the spring having a tendency to push the anti-sway 4 towards the front wheel axle 1. When the contact surface of the anti-swing member 4 with the front wheel axle 1 is worn, the spring pushes the anti-swing member 4 to move toward the center of the front wheel axle 1, so that the anti-swing member 4 is in close contact with the front wheel axle 1 again.
Alternatively, as shown in FIG. 11, the compensating structure 41 may also be a hollow portion located inside the anti-sway member 4; during initial installation, the solid portion 42 of the anti-swing member 4 is deformed and pressed toward the hollow portion; when the anti-sway member 4 is worn, the hollow portion increases in the direction of the solid portion 42 to cause the solid portion 42 to at least partially return to a deformed shape and to cause the anti-sway member 4 to continue to contact the front axle 1.
Preferably, as shown in fig. 4, the anti-swing member 4 is made of a wear-resistant type elastically deformable material such as: POM \ PA6\ rubber, etc. During initial installation, the anti-swing piece 4 is radially compressed and deformed and is installed between the front wheel axle 1 and the front wheel frame 2; after being worn, the anti-sway member 4 is deformed back toward the front wheel axle 1.
In some embodiments of the present invention, as shown in fig. 11, the anti-swing member 4 is provided with a dust-proof protrusion 43 and a dust-proof groove 44 on the contact surface with the front wheel axle 1.
Specifically, the dust-proof protrusion 43 and the dust-proof groove 44 extend along the axial center of the front axle 1 and are arranged at intervals, and the dust-proof protrusion 43 contacts with the front axle 1, so that dust can be prevented from adhering to the front axle 1. When dust sticks to the front wheel axle 1, the dust-proof protrusion 43 will peel the dust off the front wheel axle 1 and drop along the dust-proof groove 44 during the rotation of the front wheel axle 1.
In some embodiments of the present invention, as shown in fig. 3, 5 and 9, the front wheel frame 2 includes a fixing frame 21, the anti-swing element 4 is installed in the fixing frame 21, two fixing frames 21 are symmetrically arranged along the axis of the front wheel axle 1, and the fixing frame 21 is in clearance fit with the front wheel axle 1.
Specifically, the fixing frame 21 is provided with an installation groove, part of the anti-swing piece 4 is embedded into the fixing frame 21, and the fixing frame 21 is in clearance fit with the front wheel axle 1. The part of the anti-swing member 4 protruding from the fixing frame 21 faces the front wheel axle 1 and is closely fitted to the front wheel axle 1.
When the front fork 30 of the three-wheeled hand truck rotates, the front wheel frame 2 is driven to rotate together, the front wheel frame 2 drives the anti-swing part 4 to rotate together relative to the front wheel shaft 1, the anti-swing part 4 and the front wheel shaft 1 slide in a friction mode, the anti-swing part 4 is symmetrically arranged on the radial direction of the front wheel shaft 1 and symmetrically compresses the front wheel shaft 1 in the radial direction, and therefore swing of the front wheel shaft 1 due to a gap between the front wheel shaft 1 and the front wheel frame 2 is prevented.
In some embodiments of the present invention, as shown in fig. 8, there are two fixing frames 21, and the two fixing frames 21 are symmetrically arranged along the axis of the front wheel axle 1 and connected by a fixing pin 23.
Alternatively, the fixing frame 21 may be a whole, and two anti-swing parts 4 are symmetrically installed on the fixing frame 21.
In some embodiments of the present invention, as shown in fig. 9, the front wheel frame 2 further includes a connecting bracket 22, the fixing frame 21 is fixedly connected to the connecting bracket 22, the connecting bracket 22 is used for being detachably connected to the front wheel assembly 20 of the three-wheeled hand truck, and the front wheel axle 1 is inserted into the connecting bracket 22 and is in clearance fit with the connecting bracket 22.
Specifically, a circular column is provided in the connecting bracket 22, and the front wheel axle 1 is inserted into the circular column of the connecting bracket 22 and is clearance-fitted. When the locking mechanism 3 is unlocked, the connecting bracket 22 is detached from the front wheel assembly 20 and the front wheel axle 1 can be pulled out of the circular pipe string.
Further, as shown in fig. 10, the connection bracket 22 is provided with an insertion hole 221, and the anti-swing member 4 at least partially penetrates through the insertion hole 221 and then contacts with the front wheel axle 1.
After the anti-swing part 4 extends out of the fixing frame 21, the anti-swing part penetrates into the insertion hole 221 and is pressed with the surface of the front wheel shaft 1, and the anti-swing part 4 does not interfere with the insertion hole 221.
In some embodiments of the present invention, as shown in fig. 1, the stroller comprises any one of the front-wheel anti-swing structures 10, the stroller comprises a stroller frame 30, a plurality of wheel assemblies 20, the plurality of wheel assemblies 20 comprises at least one front wheel, the front wheel is provided with the front-wheel anti-swing structure 10, and the wheel frame 2 is fixed on the front side of the stroller frame 30.
Alternatively, the child buggy may be a tricycle, or a quadricycle. The front wheel anti-swing structure 10 may be provided on the front wheel, may be provided on the rear wheel, or may be provided on all of the wheel assemblies 20.
The first embodiment is as follows:
as shown in fig. 2-4, a front wheel swing preventing structure 10 for a three-wheeled hand truck includes a front wheel axle 1 and a front wheel frame 2, the front wheel axle 1 is inserted into the front wheel frame 2, the front wheel axle 1 limits axial displacement with the front wheel frame 2 through a locking structure 3, the front wheel axle 1 is rotatably connected with the front wheel frame 2 and a gap exists between the front wheel frame and the front wheel axle 2, a swing preventing member 4 is disposed between the front wheel frame 2 and the front wheel axle 1, the swing preventing member 4 is symmetrically disposed along an axis of the front wheel axle 1 and radially compressed between the front wheel frame 2 and the front wheel axle 1, and a contact surface of the swing preventing member 4 contacts with a lateral outer surface of the front wheel axle 1 to reduce deflection of the front wheel axle 1.
As shown in fig. 2, the front wheel anti-swing structure 10 includes a front wheel shaft 1 and a front wheel frame 2, one end of the front wheel shaft 1 is inserted into the front wheel frame 2 and is rotatably connected with the front wheel frame 2, and the locking structure 3 limits axial displacement between the front wheel shaft 1 and the front wheel frame 2 so that the two cannot be separated in the axial direction. The front wheel axle 1 is fixedly connected with the front wheel assembly 20, and the front wheel assembly 20 and the front wheel axle 1 rotate together relative to the front wheel frame 2.
As shown in fig. 3-4, the anti-swing part 4 is disposed between the front wheel frame 2 and the front wheel axle 1, and the anti-swing part 4 is symmetrically disposed along the axis of the front wheel axle 1 and is radially compressed between the front wheel frame 2 and the front wheel axle 1.
Because the anti-swing part 4 is extruded between the front wheel axle 1 and the front wheel frame 2, the anti-swing part 4 is in contact with the front wheel axle 1, the transverse displacement between the front wheel axle 1 and the front wheel frame 2 is limited, the swinging of the front wheel axle 1 caused by a gap between the front wheel frame 2 is effectively prevented, and the deformation probability is reduced.
In one embodiment, as shown in fig. 4, the anti-swing member 4 is made of a wear-resistant elastic deformation material, such as: POM \ PA6\ rubber, etc. During initial installation, the anti-swing piece 4 is radially compressed and deformed and is installed between the front wheel axle 1 and the front wheel frame 2; after being worn, the anti-sway member 4 is deformed back toward the front wheel axle 1.
As shown in fig. 3, the contact surface of the ornament prevention member 4 with the front axle 1 is provided with a dust-proof protrusion 43 and a dust-proof groove 44.
Specifically, the dust-proof protrusion 43 and the dust-proof groove 44 extend along the axial center of the front axle 1 and are arranged at intervals, and the dust-proof protrusion 43 contacts with the front axle 1, so that dust can be prevented from adhering to the front axle 1. When dust sticks to the front wheel axle 1, the dust-proof protrusion 43 will peel the dust off the front wheel axle 1 and drop along the dust-proof groove 44 during the rotation of the front wheel axle 1.
As shown in fig. 3, the front wheel frame 2 includes a fixing frame 21, the anti-swing member 4 is installed in the fixing frame 21, the two fixing frames 21 are symmetrically arranged along the axis of the front wheel axle 1, and the fixing frame 21 and the front wheel axle 1 are in clearance fit.
Specifically, the fixing frame 21 is provided with an installation groove, part of the anti-swing piece 4 is embedded into the fixing frame 21, and the fixing frame 21 is in clearance fit with the front wheel axle 1. The part of the anti-swing member 4 protruding from the fixing frame 21 faces the front wheel axle 1 and is closely fitted to the front wheel axle 1.
When the front fork 30 of the three-wheeled hand truck rotates, the front wheel frame 2 is driven to rotate together, the front wheel frame 2 drives the anti-swing part 4 to rotate together relative to the front wheel shaft 1, the anti-swing part 4 and the front wheel shaft 1 slide in a friction mode, the anti-swing part 4 is symmetrically arranged on the radial direction of the front wheel shaft 1 and symmetrically compresses the front wheel shaft 1 in the radial direction, and therefore swing of the front wheel shaft 1 caused by a gap between the front wheel shaft 1 and the front wheel frame 2 can be prevented.
In the first embodiment, as shown in fig. 3, there are two fixing frames 21, and the two fixing frames 21 are symmetrically arranged along the axis of the front wheel axle 1 and connected with each other by a fixing pin (not shown).
Alternatively, the fixing frame 21 may be a whole, and two anti-swing parts 4 are symmetrically installed on the fixing frame 21.
As shown in fig. 3, the front wheel frame 2 further includes a connecting bracket 22, the fixing frame 21 is fixedly connected with the connecting bracket 22, the connecting bracket 22 is used for being detachably connected with the front wheel assembly 20 of the three-wheeled hand truck, and the front wheel shaft 1 is inserted into the connecting bracket 22 and is in clearance fit with the connecting bracket 22.
Specifically, a circular column is provided in the connecting bracket 22, and the front wheel axle 1 is inserted into the circular column of the connecting bracket 22 and is clearance-fitted. When the locking mechanism 3 is unlocked, the connecting bracket 22 is detached from the front wheel assembly 20 and the front wheel axle 1 can be pulled out of the circular pipe string.
Furthermore, the connecting bracket 22 is provided with an insertion hole 221 (see fig. 6), and the anti-swing member 4 at least partially penetrates through the insertion hole 221 and then contacts with the front wheel axle 1.
After the anti-swing part 4 extends out of the fixing frame 21, the anti-swing part penetrates into the insertion hole 221 and is pressed with the surface of the front wheel shaft 1, and the anti-swing part 4 does not interfere with the insertion hole 221.
In the first embodiment, the anti-swing member 4 is made of a wear-resistant elastic deformable material, and is pressed between the fixing frame 21 and the front wheel axle 1 during initial installation, so that the anti-swing member 4 is pressed against the front wheel axle 1. Because the anti-swing parts 4 are symmetrically arranged on two opposite sides of the front wheel axle 1, when the front wheel axle 1 and the front wheel frame 2 rotate relatively, the anti-swing parts 4 can prevent the front wheel axle 1 from swinging due to a gap between the front wheel frame 2 and the front wheel frame 1, and the deformation probability is reduced. After the friction surfaces of the anti-swing part 4 and the front wheel shaft 1 are abraded, the anti-swing part 4 can partially recover and deform and further compress the front wheel shaft 1 to continuously keep the anti-swing function until the anti-swing part 4 completely recovers and deforms and is abraded, and the service life of the product is prolonged.
Example two:
as shown in fig. 5 to 8, unlike the first embodiment, the second embodiment is that the anti-swing member 4 includes the compensation structure 41, and when the contact surface of the anti-swing member 4 with the front wheel axle 1 is worn, the compensation structure 41 pushes the anti-swing member 4 toward the front wheel axle 1, so that the anti-swing member 4 is kept in contact with the front wheel axle 1.
The compensation structure 41 pushes the anti-sway device 4 towards the front axle 1 in case the anti-sway device 4 is worn out by a certain amount, so that the anti-sway device 4 continues to maintain contact with the front axle 1 and continues to prevent sway.
Specifically, as shown in fig. 5, the compensation structure 41 is a spring, which is disposed between the front wheel frame 2 and the anti-swing member 4, and pushes the anti-swing member 4 to keep in contact with the front wheel axle 1 when the anti-swing member 4 is worn.
At initial installation, the spring is compressed between the anti-sway 4 and the front wheel carrier 2, the spring having a tendency to push the anti-sway 4 towards the front wheel axle 1. When the contact surface of the anti-swing member 4 with the front wheel axle 1 is worn, the spring pushes the anti-swing member 4 to move toward the center of the front wheel axle 1, so that the anti-swing member 4 is in close contact with the front wheel axle 1 again.
As shown in fig. 5, the front wheel frame 2 includes a fixing frame 21, the anti-swing member 4 is installed in the fixing frame 21, the two fixing frames 21 are symmetrically arranged along the axis of the front wheel axle 1, and the fixing frame 21 and the front wheel axle 1 are in clearance fit.
Specifically, the fixing frame 21 is provided with an installation groove, part of the anti-swing piece 4 is embedded into the fixing frame 21, and the fixing frame 21 is in clearance fit with the front wheel axle 1. The part of the anti-swing member 4 protruding from the fixing frame 21 faces the front wheel axle 1 and is closely fitted to the front wheel axle 1.
As shown in fig. 6 to 7, a groove is opened in the anti-swing member 4, a positioning protrusion 45 is provided at the bottom of the groove, one end of the spring inserted into the groove is engaged with the positioning protrusion 45, the positioning protrusion 45 is used for positioning the spring to prevent the spring from bending when compressed, and the other end of the spring is abutted against the bottom of the mounting groove.
As shown in fig. 8, there are two fixing frames 21, and the two fixing frames 21 are symmetrically arranged along the axis of the front wheel axle 1 and connected by fixing pins 23.
Alternatively, the fixing frame 21 may be a whole, and two anti-swing parts 4 are symmetrically installed on the fixing frame 21.
As shown in fig. 6, the front wheel frame 2 further includes a connecting bracket 22, the fixing frame 21 is fixedly connected with the connecting bracket 22, the connecting bracket 22 is used for being detachably connected with the front wheel assembly 20 of the three-wheeled hand truck, and the front wheel shaft 1 is inserted into the connecting bracket 22 and is in clearance fit with the connecting bracket 22.
Specifically, a circular column is provided in the connecting bracket 22, and the front wheel axle 1 is inserted into the circular column of the connecting bracket 22 and is clearance-fitted. When the locking mechanism 3 is unlocked, the connecting bracket 22 is detached from the front wheel assembly 20 and the front wheel axle 1 can be pulled out of the circular pipe string.
As shown in fig. 6, the connection bracket 22 is provided with an insertion hole 221, and the anti-swing member 4 at least partially passes through the insertion hole 221 and contacts with the front wheel axle 1.
After the anti-swing part 4 extends out of the fixing frame 21, the anti-swing part penetrates into the insertion hole 221 and is pressed with the surface of the front wheel shaft 1, and the anti-swing part 4 does not interfere with the insertion hole 221.
In the second embodiment, the spring is compressed between the swing preventing member 4 and the fixing frame 21 at the initial installation, and the spring pushes the swing preventing member 4 toward the front wheel axle 1 and presses the front wheel axle 1. When the contact surface of the anti-swing element 4 is worn, the spring pushes the anti-swing element 4 further towards the front axle 1, so that the anti-swing element 4 again presses against the front axle 1. And the anti-swing piece 4 is worn and not failed until the spring is completely restored and deformed, so that the service life of the product is prolonged.
In the second embodiment, the anti-swing part 4 can be made of a material which has wear resistance and no elasticity, so that the anti-swing part 4 has better wear resistance and reduces wear; the spring (compensation structure) can press the anti-swing part 4 and the front wheel shaft 1 and also has a compensation effect, so that the service life of the product is longer.
Example three:
as shown in fig. 9 to 12, unlike the first embodiment, the third embodiment is that the anti-swing member 4 includes the compensation structure 41, and when the contact surface of the anti-swing member 4 with the front wheel axle 1 is worn, the compensation structure 41 pushes the anti-swing member 4 toward the front wheel axle 1, so that the anti-swing member 4 is kept in contact with the front wheel axle 1.
The compensation structure 41 pushes the anti-sway device 4 towards the front axle 1 in case the anti-sway device 4 is worn out by a certain amount, so that the anti-sway device 4 continues to maintain contact with the front axle 1 and continues to prevent sway.
As shown in fig. 11, the compensating structure 41 is a hollow portion located inside the anti-sway 4; during initial installation, the solid portion 42 of the anti-swing member 4 is deformed and pressed toward the hollow portion; when the anti-sway member 4 is worn, the hollow portion increases in the direction of the solid portion 42 to cause the solid portion 42 to at least partially return to a deformed shape and to cause the anti-sway member 4 to continue to contact the front axle 1.
Specifically, the compensation structure 41 is a hollow structure with a narrow middle part and two wide ends, as shown in fig. 12, when initially installed, the compensation structure 41 is compressed and deformed, and the narrow middle part is bent toward the center, so that the compensation structure 41 is compressed and shortened between the front wheel axle 1 and the fixed frame 21, and the solid part 42 is pressed against the front wheel axle 1.
When the contact surface of the solid portion 42 is worn, the compensating structure 41 at least partially deforms back, the width of the middle narrow portion increases, so that the overall length of the compensating structure 41 increases, the solid portion 42 is pushed towards the front axle 1, so that the solid portion 42 is pressed against the front axle 1 again, and the compensating effect is achieved until the compensating structure 41 deforms back completely.
In the third embodiment, the anti-swing member 4 and the compensation structure 41 are integrated, the compensation structure 41 is a hollow portion hollowed out from the anti-swing member 4, and the anti-swing member 4 is made of a wear-resistant elastically deformable material.
As shown in fig. 11, the anti-swing member 4 is provided with a dust-proof protrusion 43 and a dust-proof groove 44 on the contact surface with the front wheel axle 1.
Specifically, the dust-proof protrusion 43 and the dust-proof groove 44 extend along the axial center of the front axle 1 and are arranged at intervals, and the dust-proof protrusion 43 contacts with the front axle 1, so that dust can be prevented from adhering to the front axle 1. When dust sticks to the front wheel axle 1, the dust-proof protrusion 43 will peel the dust off the front wheel axle 1 and drop along the dust-proof groove 44 during the rotation of the front wheel axle 1.
Example four:
as shown in fig. 1, the stroller comprises a front wheel swing preventing structure 10 in any of the above embodiments, the stroller comprises a stroller frame 30, a plurality of wheel assemblies 20, the plurality of wheel assemblies 20 at least comprise a front wheel, the front wheel is provided with the front wheel swing preventing structure 10, and the wheel frame 2 is fixed on the front side of the stroller frame 30.
Specifically, the stroller frame 30 is a tricycle frame, and the wheel assembly 20 includes a front wheel, and the front wheel anti-swing structure 10 is only disposed on the front wheel.
In this embodiment, the front wheel anti-swing structure 10 is disposed on the front wheel, so as to prevent the front wheel axle from swinging due to the gap between the front wheel axle and the front wheel frame, and reduce the deformation probability.
In the utility model, the anti-swing part 4 is extruded between the front wheel shaft 1 and the front wheel frame 2, so that the anti-swing part 4 is contacted with the front wheel shaft 1, the transverse displacement between the front wheel shaft 1 and the front wheel frame 2 is limited, the swing of the front wheel shaft caused by a gap between the front wheel shaft and the front wheel frame is effectively prevented, and the deformation probability is reduced.
The dustproof bulge can scrape sundries such as dust and particles stuck on the front axle, and the scraped sundries are discharged to the outside through the dustproof groove, so that the shaft part is effectively protected, and the abrasion is reduced.
The foregoing is considered as illustrative only of the principles and preferred embodiments of the utility model. It should be noted that, for those skilled in the art, several other modifications can be made on the basis of the principle of the present invention, and the protection scope of the present invention should be regarded.
Claims (10)
1. A front wheel anti-swing structure (10) comprises a front wheel shaft (1) and a front wheel frame (2), wherein the front wheel shaft (1) is inserted into the front wheel frame (2), the front wheel shaft (1) limits axial displacement between the front wheel frame (2) and the front wheel frame (1) through a locking structure (3), the front wheel shaft (1) is rotationally connected with the front wheel frame (2) and a gap exists between the front wheel frame and the front wheel frame, the front wheel anti-swing structure is characterized in that a swing prevention part (4) is arranged between the front wheel frame (2) and the front wheel shaft (1), the swing prevention part (4) is symmetrically arranged along the axis of the front wheel shaft (1) and is extruded between the front wheel frame (2) and the front wheel shaft (1) along the radial direction, and the contact surface of the swing prevention part (4) is in contact with the lateral outer surface of the front wheel shaft (1) so as to reduce the swing of the front wheel shaft (1).
2. Front wheel anti-swing structure (10) according to claim 1, characterized in that the anti-swing part (4) is provided with dust-proof protrusions (43) at the contact surface with the front wheel axle (1), dust-proof grooves (44) being formed between the dust-proof protrusions (43).
3. Front wheel anti-swing structure (10) according to claim 1, characterized in that the front wheel frame (2) comprises a fixed frame (21), the anti-swing part (4) is mounted in the fixed frame (21), two fixed frames (21) are symmetrically arranged along the axis of the front wheel axle (1), and the fixed frame (21) is in clearance fit with the front wheel axle (1).
4. Front wheel anti-swing structure (10) according to claim 3, characterized in that the two said fixed frames (21) are connected by a fixed pin (23).
5. Front wheel anti-swing structure (10) according to claim 3, characterised in that said front wheel frame (2) further comprises a connecting bracket (22), said fixed frame (21) being fixedly connected with said connecting bracket (22), said connecting bracket (22) being intended to be removably connected with the front wheel assembly (20) of the trolley, said front wheel axle (1) being inserted in said connecting bracket (22) and being clearance-fitted with said connecting bracket (22).
6. Front wheel anti-swing structure (10) according to claim 1, characterized in that said anti-swing element (4) is made of a wear-resistant elastically deformable material.
7. Front wheel anti-swing structure (10) according to claim 1, characterized in that the anti-swing part (4) comprises a compensation structure (41), when the contact surface of the anti-swing part (4) with the front wheel axle (1) is worn, the compensation structure (41) pushes the anti-swing part (4) towards the front wheel axle (1) to keep the anti-swing part (4) in contact with the front wheel axle (1).
8. Front wheel anti-swing structure (10) according to claim 7, characterized in that said compensation structure (41) is a spring, arranged between the front wheel carrier (2) and the anti-swing part (4), which pushes the anti-swing part (4) to continue to keep in contact with the front wheel axle (1) when the anti-swing part (4) is worn.
9. Front wheel anti-swing structure (10), according to claim 7, characterized in that said compensation structure (41) is a hollow portion located inside said anti-swing part (4); during initial installation, the solid part (42) of the anti-swing part (4) deforms and presses towards the hollow part; when the anti-swing part (4) is worn, the hollow part is enlarged towards the solid part (42) so that the solid part (42) is at least partially deformed in a restoring way, and the anti-swing part (4) is kept in contact with the front wheel shaft (1).
10. A child stroller comprising the front-wheel anti-swing structure (10) according to any one of claims 1 to 9, the child stroller comprising a stroller frame (30), a plurality of wheel assemblies (20), the plurality of wheel assemblies (20) comprising at least one front wheel, the front wheel being provided with the front-wheel anti-swing structure (10), the front wheel frame being fixed to a front side of the stroller frame (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121483012.6U CN215553500U (en) | 2021-06-30 | 2021-06-30 | Front wheel anti-swing structure and children's handcart |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121483012.6U CN215553500U (en) | 2021-06-30 | 2021-06-30 | Front wheel anti-swing structure and children's handcart |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215553500U true CN215553500U (en) | 2022-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121483012.6U Active CN215553500U (en) | 2021-06-30 | 2021-06-30 | Front wheel anti-swing structure and children's handcart |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215553500U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023274155A1 (en) * | 2021-06-30 | 2023-01-05 | 东莞金旺儿童用品有限公司 | Wheel anti-biasing assembly and child stroller |
-
2021
- 2021-06-30 CN CN202121483012.6U patent/CN215553500U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023274155A1 (en) * | 2021-06-30 | 2023-01-05 | 东莞金旺儿童用品有限公司 | Wheel anti-biasing assembly and child stroller |
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