CN113320589B - Wheel deviation prevention assembly and child trolley - Google Patents
Wheel deviation prevention assembly and child trolley Download PDFInfo
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- CN113320589B CN113320589B CN202110737635.XA CN202110737635A CN113320589B CN 113320589 B CN113320589 B CN 113320589B CN 202110737635 A CN202110737635 A CN 202110737635A CN 113320589 B CN113320589 B CN 113320589B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B9/00—Accessories or details specially adapted for children's carriages or perambulators
- B62B9/16—Mud-guards or protecting devices for wheels
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Abstract
The invention discloses a wheel deviation preventing structure for a child trolley, which comprises a wheel shaft and a wheel frame, wherein the wheel shaft is inserted into the wheel frame, a front axle wheel is rotationally connected with the wheel frame and keeps a non-separation state, a deviation preventing part is arranged between the wheel frame and the wheel shaft, the deviation preventing part is symmetrically arranged along the axis of the wheel shaft and is extruded between the wheel frame and the wheel shaft along the radial direction of the wheel shaft. According to the child stroller, the anti-deviation piece is extruded between the wheel shaft and the wheel frame, so that the anti-deviation piece is in contact with the wheel shaft, the rotation between the wheel shaft and the wheel frame is limited, the phenomenon that the wheels suddenly turn is reduced, and the safety performance and the structural stability of the child stroller are improved; and when needing to turn to, only need manual increase to the power of turning to the shallow handle just can realize turning to, need not to carry out the unblock operation alone to the wheel for the convenient high efficiency of operation more.
Description
Technical Field
The invention relates to the technical field of trolleys, in particular to a wheel deviation preventing structure for a child trolley and the child trolley.
Background
In the prior art, the wheels of the child stroller are easy to incline in the moving mode. This situation can cause the wheels to be subject to sudden steering and thus safety problems, or deformation of the wheel axle.
A conventional stroller includes a wheel assembly, a wheel axle and a wheel frame, the wheel assembly is connected to the wheel axle, and the wheel axle is inserted into the wheel frame and rotatably connected to the wheel frame. At present, the child stroller generally controls two states of wheel positioning and free steering through a wheel locking structure arranged between a wheel shaft and a wheel frame of a wheel assembly; when the handcart needs to be moved straight, the locking mechanism is locked, the wheel body is moved straight forward, and the handcart can be moved straight forward; when frequent turning is required, the locking structure is unlocked, and the wheels can freely rotate relative to the wheel frame along the axial direction;
however, if the wheel assembly is not provided with a steering locking structure during traveling, the wheel assembly is in danger when traveling straight fast and has a slight obstacle, for example, the wheel is easy to deflect and steer suddenly when the wheel touches a small stone; however, if the steering lock structure is provided, the operator is required to stop to perform the locking or unlocking operation alone when the steering and straight-ahead modes are switched, so that the operation is inconvenient.
Therefore, there is a need for a wheel deflection preventing structure for a child stroller and a child stroller that prevents deflection of a wheel assembly when the wheel assembly is traveling straight and is easy to operate.
Disclosure of Invention
The present invention is directed to overcoming the disadvantages of the prior art and providing a wheel deflection preventing structure for a child stroller and a child stroller that prevent the wheel assembly from deflecting when the wheel assembly is in a straight-ahead state and that are easy to operate.
The technical scheme of the invention provides a wheel deviation preventing structure for a child handcart, which comprises a wheel shaft and a wheel frame, wherein the wheel shaft is inserted into the wheel frame, the wheel shaft is rotationally connected with the wheel frame and is kept in a non-separated state, a deviation preventing part is arranged between the wheel frame and the wheel shaft, the deviation preventing part is symmetrically arranged along the axis of the wheel shaft and is squeezed between the wheel frame and the wheel shaft along the radial direction of the wheel shaft.
Under the action of the deviation-preventing piece, when the handcart moves at a certain speed, the wheels keep in a straight-moving state, sudden direction change and deflection cannot occur, and the possibility of danger caused by sudden deflection is reduced; when the cart needs to be steered, steering can be achieved only by manually increasing the steering force of the cart handle, and unlocking operation is not needed to be carried out on wheels independently, so that operation is more convenient and efficient.
Further, the deviation preventing part comprises a compensation structure, and when a contact surface of the deviation preventing part and the wheel shaft is worn, the compensation structure pushes the deviation preventing part to the wheel shaft so that the deviation preventing part and the wheel shaft are kept in contact.
Further, the compensation structure is a spring and is arranged between the wheel frame and the deviation preventing piece, and when the deviation preventing piece is worn, the spring pushes the deviation preventing piece to be continuously kept in contact with the wheel shaft.
Further, the compensation structure is a hollow part positioned inside the deviation preventing piece; during initial installation, the solid part of the deviation preventing piece deforms and extrudes towards the hollow part; when the deviation preventing piece is worn, the hollow part is enlarged towards the solid part, so that the solid part is at least partially deformed, and the deviation preventing piece is kept in contact with the wheel shaft.
Further, the deviation-preventing member is made of a wear-resistant elastic deformation material.
Furthermore, the wheel frame comprises fixing frames, the deviation preventing parts are installed in the fixing frames, the two fixing frames are symmetrically arranged along the axis of the wheel shaft, and the fixing frames are in clearance fit with the wheel shaft.
Furthermore, the two fixing frames are connected through fixing pins.
Furthermore, the wheel frame 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 wheel assembly of the child trolley, and the wheel shaft is inserted into the connecting support and is in clearance fit with the connecting support.
Furthermore, the connecting bracket is provided with an insertion hole, and the anti-deviation piece at least partially penetrates through the insertion hole and then is contacted with the wheel shaft.
The invention also provides a child handcart which comprises any one of the wheel deviation preventing structures, the child handcart comprises a handcart frame and a plurality of wheel assemblies, the wheel assemblies at least comprise one front wheel, the wheel deviation preventing structures are arranged on the front wheels, and the wheel frame is fixed on the front side of the handcart frame.
After adopting above-mentioned technical scheme, have following beneficial effect:
according to the child handcart, the anti-deviation piece is extruded between the wheel shaft and the wheel frame, so that the anti-deviation piece is in contact with the wheel shaft, the rotation between the wheel shaft and the wheel frame is limited to a certain extent, the phenomenon that the wheels suddenly turn is reduced, and the safety performance and the structural stability of the child handcart are improved; when the steering is needed, the steering can be realized only by manually increasing the steering force on the handle of the trolley, and the unlocking operation is not needed to be carried out on the wheels independently, so that the operation is more convenient and efficient; simultaneously, the anti-deviation piece that the symmetry set up can reduce the probability that axle itself takes place to incline or warp to a certain extent to effectual improvement children's handcart's life.
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 child stroller embodying the fourth embodiment of the present invention;
FIG. 2 is a perspective view of a wheel anti-deflection structure according to an embodiment of the present invention;
FIG. 3 is an exploded view of a wheel anti-deflection structure according to an embodiment of the present invention;
FIG. 4 is an axial cross-sectional view of a wheel anti-deflection structure according to an embodiment of the present invention;
FIG. 5 is an exploded view of a wheel anti-yaw structure according to a second embodiment of the present invention;
FIG. 6 is an exploded view of the wheel anti-deviation structure according to another perspective in the second embodiment of the present invention;
FIG. 7 is a radial cross-sectional view of a wheel misalignment preventing structure in a second embodiment of the present invention;
FIG. 8 is a perspective view of a wheel deviation preventing structure according to a second embodiment of the present invention;
fig. 9 is an exploded view of a wheel deviation preventing structure in the third embodiment of the present invention;
fig. 10 is an exploded view of another perspective of the wheel deviation preventing structure in the third embodiment of the present invention;
FIG. 11 is a perspective view of a deviation preventing member in the third embodiment of the present invention;
fig. 12 is a radial cross-sectional view of a wheel misalignment preventing structure in a third embodiment of the present invention.
Reference symbol comparison table:
the wheel deviation preventing structure 10, the wheel assembly 20 and the trolley frame 30;
a wheel shaft 1;
the wheel frame 2: the fixing frame 21, the connecting bracket 22, the jack 221 and the fixing pin 23;
a locking structure 3;
deviation prevention piece 4: 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, a person skilled in the art can substitute various structural modes and implementation modes with each other without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as limiting or restricting the technical aspects of the present invention.
The directional terms upper, lower, left, right, front, rear, front, back, top, bottom and the like that are or may be mentioned in this specification are defined relative to the configurations shown in the drawings, and are relative concepts that may be changed accordingly depending on 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 wheel deviation preventing structure 10 for a stroller includes a wheel axle 1 and a wheel frame 2, the wheel axle 1 is inserted into the wheel frame 2, the wheel axle 1 is rotatably connected to the wheel frame 2 and is kept in a non-separated state, a deviation preventing member 4 is disposed between the wheel frame 2 and the wheel axle 1, the deviation preventing member 4 is symmetrically disposed along an axis of the wheel axle 1 and is compressed between the wheel frame 2 and the wheel axle 1 along a radial direction of the 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 child stroller includes a wheel deviation preventing structure 10, a wheel assembly 20, and a stroller frame 30, wherein the wheel deviation 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 wheel deviation preventing structure 10.
As shown in fig. 2, the wheel deviation preventing structure 10 includes a wheel axle 1 and a wheel frame 2, one end of the wheel axle 1 is inserted into the wheel frame 2 and is rotatably connected with the wheel frame 2, and the locking structure 3 limits axial displacement between the wheel axle 1 and the wheel frame 2 so that the wheel axle 1 and the wheel frame 2 cannot be separated from each other in the axial direction. The wheel shaft 1 is fixedly connected to the wheel assembly 20, and the wheel assembly 20 and the wheel shaft 1 rotate together relative to the wheel carrier 2.
As shown in fig. 3 to 4, an anti-deviation member 4 is disposed between the wheel frame 2 and the wheel axle 1, and the anti-deviation member 4 is symmetrically disposed along the axis of the wheel axle 1 and is compressed between the wheel frame 2 and the wheel axle 1 along the radial direction of the wheel axle 1.
The anti-deviation piece 4 is extruded between the wheel shaft 1 and the wheel frame 2, so that the anti-deviation piece 4 is in contact with the wheel shaft 1, the rotation between the wheel shaft 1 and the wheel frame 2 is limited to a certain extent, the phenomenon that the wheels suddenly turn is reduced, and the safety performance and the structural stability of the child handcart are improved; when the steering is needed, the steering can be realized only by manually increasing the steering force on the handle of the trolley, and the unlocking operation is not needed to be carried out on the wheels independently, so that the operation is more convenient and efficient; simultaneously, the anti-deviation piece that the symmetry set up can reduce the probability that axle itself takes place the skew or warp to a certain extent to effectual improvement children's handcart's life. In some embodiments of the present invention, the anti-deviation member 4 comprises a compensation structure 41, and when the contact surface of the anti-deviation member 4 with the wheel shaft 1 is worn, the compensation structure 41 pushes the anti-deviation member 4 towards the wheel shaft 1, so that the anti-deviation member 4 is kept in contact with the wheel shaft 1.
The compensation structure 41 pushes the deviation preventing member 4 toward the wheel shaft 1 in case the deviation preventing member 4 is worn by a certain amount, so that the deviation preventing member 4 continues to maintain contact with the wheel shaft 1, and the sudden turning during the straight running of the wheel is continuously prevented.
Alternatively, as shown in fig. 5, the compensating structure 41 is a spring disposed between the wheel frame 2 and the anti-bias member 4, which urges the anti-bias member 4 to continue to maintain contact with the wheel axle 1 as the anti-bias member 4 wears.
When initially installed, the spring is compressed between the anti-deflection member 4 and the wheel frame 2, and the spring has a tendency to urge the anti-deflection member 4 in a direction towards the wheel axle 1. When the contact surface of the anti-deviation piece 4 and the wheel shaft 1 is worn, the spring pushes the anti-deviation piece 4 to move towards the center of the wheel shaft 1, so that the anti-deviation piece 4 is in close contact with the wheel shaft 1 again.
Alternatively, as shown in fig. 11, the compensating structure 41 may also be a hollow part located inside the deviation preventing member 4; during initial installation, the solid part 42 of the deviation preventing piece 4 deforms and presses towards the hollow part; when the anti-deviation member 4 is worn, the hollow portion increases in the direction of the solid portion 42 to at least partially deform the solid portion 42 and keep the anti-deviation member 4 in contact with the wheel axle 1.
Preferably, as shown in fig. 4, the deviation preventing member 4 is made of a wear-resistant elastically deformable material, such as: POM \ PA6\ rubber, etc. During initial installation, the deviation preventing piece 4 is radially compressed and deformed and is arranged between the wheel shaft 1 and the wheel frame 2; after wear, the deflection protection element 4 is deformed back in the direction of the wheel axle 1.
In some embodiments of the present invention, as shown in fig. 11, the contact surface of the deviation preventing member 4 with the wheel axle 1 is provided with a dust preventing protrusion 43 and a dust preventing groove 44.
Specifically, the dust-proof protrusions 43 and the dust-proof grooves 44 extend along the axis of the wheel axle 1 and are arranged at intervals, and the dust-proof protrusions 43 contact with the wheel axle 1, so that dust can be prevented from adhering to the wheel axle 1. When dust adheres to the wheel axle 1, the dust-proof protrusions 43 peel off the wheel axle 1 and fall along the dust-proof grooves 44 during the rotation of the wheel axle 1.
In some embodiments of the present invention, as shown in fig. 3, 5 and 9, the wheel frame 2 includes a fixing frame 21, the anti-deviation component 4 is installed in the fixing frame 21, two fixing frames 21 are symmetrically arranged along the axis of the wheel axle 1, and the fixing frames 21 are in clearance fit with the wheel axle 1.
Specifically, the fixing frame 21 is provided with an installation groove, part of the deviation preventing part 4 is embedded into the fixing frame 21, and the fixing frame 21 is in clearance fit with the wheel axle 1. The part of the deviation preventing piece 4 extending from the fixing frame 21 faces the wheel shaft 1 and is tightly attached to the wheel shaft 1.
When the stroller frame 30 of the stroller rotates, the wheel frame 2 is driven to rotate together, the wheel frame 2 drives the deviation preventing part 4 to rotate together relative to the wheel shaft 1, the deviation preventing part 4 slides with the wheel shaft 1 in a friction manner, and the deviation preventing part 4 is symmetrically arranged in the radial direction of the wheel shaft 1 and symmetrically presses the wheel shaft 1 in the radial direction, so that the situation that the wheel shaft 1 deviates from the wheel frame 2 in the rotating process can be 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 wheel axle 1 and connected by a fixing pin 23.
Alternatively, the fixing frame 21 may be a whole, and two deviation-preventing parts 4 are symmetrically installed on the fixing frame 21.
In some embodiments of the present invention, as shown in fig. 9, the 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 detachably connecting with the wheel assembly 20 of the stroller, and the wheel axle 1 is inserted into the connecting bracket 22 and is in clearance fit with the connecting bracket 22.
In particular, a circular column is provided in the connection bracket 22, and the wheel axle 1 is inserted into the circular column between the connections 22 and is clearance-fitted. When the locking mechanism 3 is unlocked, the connecting bracket 22 is detached from the wheel assembly 20, and the wheel axle 1 can be removed from the circular column.
Further, as shown in fig. 10, the connection bracket 22 is provided with an insertion hole 221, and the anti-deviation member 4 at least partially passes through the insertion hole 221 and contacts with the wheel axle 1.
After extending out of the fixing frame 21, the deviation-preventing part 4 penetrates into the insertion hole 221 and is pressed against the surface of the wheel axle 1, and the deviation-preventing 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 wheel deflection preventing structures 10, and the stroller comprises a stroller frame 30 and a plurality of wheel assemblies 20, wherein the plurality of wheel assemblies 20 comprises at least one front wheel, the wheel deflection preventing structure 10 is arranged on the front wheel, 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 wheel deviation preventing structure 10 may be provided on the front wheel, may be provided on the rear wheel, or may be provided on all the wheel assemblies 20.
The first embodiment is as follows:
as shown in fig. 2 to 4, the wheel deviation preventing structure 10 for a children's barrow includes a wheel shaft 1 and a wheel frame 2, the wheel shaft 1 is inserted into the wheel frame 2, the wheel shaft 1 is limited to axial displacement with the wheel frame 2 by a locking structure 3, the front axle wheel 1 is rotatably connected with the wheel frame 2, a deviation preventing member 4 is arranged between the wheel frame 2 and the wheel shaft 1, the deviation preventing member 4 is symmetrically arranged along the axis of the wheel shaft 1 and is squeezed between the wheel frame 2 and the wheel shaft 1 along the radial direction of the wheel shaft 1.
As shown in fig. 2, the wheel deviation preventing structure 10 includes a wheel axle 1 and a wheel frame 2, one end of the wheel axle 1 is inserted into the wheel frame 2 and is rotatably connected with the wheel frame 2, and the locking structure 3 limits axial displacement between the wheel axle 1 and the wheel frame 2 so that the wheel axle 1 and the wheel frame 2 cannot be separated from each other in the axial direction. The wheel shaft 1 is fixedly connected to the wheel assembly 20, and the wheel assembly 20 and the wheel shaft 1 rotate together relative to the wheel carrier 2.
As shown in fig. 3 to 4, an anti-deviation member 4 is disposed between the wheel frame 2 and the wheel axle 1, and the anti-deviation member 4 is symmetrically disposed along the axis of the wheel axle 1 and is compressed between the wheel frame 2 and the wheel axle 1 along the radial direction of the wheel axle 1.
Under the action of the deviation preventing part 4, when the handcart moves at a certain speed, the wheels keep a straight-moving state, sudden direction change and deflection cannot occur, and the possibility of danger caused by sudden deflection is reduced; when the cart needs to be steered, steering can be achieved only by manually increasing the steering force of the cart handle, and unlocking operation is not needed to be carried out on wheels independently, so that operation is more convenient and efficient.
In the first embodiment, as shown in fig. 4, the deviation preventing member 4 is made of a wear-resistant elastic deformable material, such as: POM \ PA6\ rubber, etc. During initial installation, the deviation preventing piece 4 is radially compressed and deformed and is arranged between the wheel shaft 1 and the wheel frame 2; after wear, the deflection protection element 4 is deformed back in the direction of the wheel axle 1.
As shown in fig. 3, the contact surface of the deviation preventing member 4 with the wheel axle 1 is provided with a dust-proof protrusion 43 and a dust-proof groove 44.
Specifically, the dust-proof protrusions 43 and the dust-proof grooves 44 extend along the axis of the wheel axle 1 and are arranged at intervals, and the dust-proof protrusions 43 contact with the wheel axle 1, so that dust can be prevented from adhering to the wheel axle 1. When dust adheres to the wheel axle 1, the dust-proof protrusions 43 peel off the wheel axle 1 and fall along the dust-proof grooves 44 during the rotation of the wheel axle 1.
As shown in fig. 3, the wheel frame 2 includes a fixing frame 21, the anti-deviation component 4 is installed in the fixing frame 21, the two fixing frames 21 are symmetrically arranged along the axis of the wheel axle 1, and the fixing frame 21 is in clearance fit with the wheel axle 1.
Specifically, the fixing frame 21 is provided with an installation groove, part of the deviation-preventing part 4 is embedded into the fixing frame 21, and the fixing frame 21 is in clearance fit with the wheel shaft 1. The part of the deviation preventing piece 4 extending from the fixing frame 21 faces the wheel shaft 1 and is tightly attached to the wheel shaft 1.
When the stroller frame 30 of the stroller rotates, the wheel frame 2 is driven to rotate together, the wheel frame 2 drives the deviation preventing part 4 to rotate together relative to the wheel shaft 1, the deviation preventing part 4 slides with the wheel shaft 1 in a friction manner, and the deviation preventing part 4 is symmetrically arranged in the radial direction of the wheel shaft 1 and symmetrically presses the wheel shaft 1 in the radial direction, so that the situation that the wheel shaft 1 deviates from the wheel frame 2 in the rotating process 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 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 deviation-preventing parts 4 are symmetrically installed on the fixing frame 21.
As shown in fig. 3, the 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 wheel assembly 20 of the children handcart, and the 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 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 wheel assembly 20, and the wheel axle 1 can be removed from the circular column.
Furthermore, the connecting bracket 22 is provided with an insertion hole 221 (see fig. 6), and the anti-deviation piece 4 at least partially penetrates through the insertion hole 221 and then contacts with the wheel axle 1.
After the deviation preventing piece 4 extends out of the fixing frame 21, the deviation preventing piece penetrates into the insertion hole 221 and is pressed with the surface of the wheel axle 1, and the deviation preventing piece 4 does not interfere with the insertion hole 221.
In the first embodiment, the deviation preventing member 4 is made of a wear-resistant elastic deformation material, and is pressed between the fixing frame 21 and the wheel axle 1 during initial installation, so that the deviation preventing member 4 is pressed against the wheel axle 1. Because the anti-deviation pieces 4 are symmetrically arranged on the two opposite sides of the wheel shaft 1, the rotation between the wheel shaft 1 and the wheel frame 2 is limited to a certain extent, so that the phenomenon that the wheels suddenly turn is reduced, and the safety performance and the structural stability of the child handcart are improved. When the steering is needed, the steering can be realized only by manually increasing the steering force on the handle of the trolley, and the unlocking operation is not needed to be carried out on the wheels independently, so that the operation is more convenient and efficient; simultaneously, the anti-deviation piece 4 that the symmetry set up can reduce the probability that axle itself takes place to incline or warp to a certain extent to effectual improvement children's handcart's life. When the friction surfaces of the anti-deviation piece 4 and the wheel shaft 1 are worn, the anti-deviation piece 4 can partially recover and deform and further press the wheel shaft 1 to play a role in preventing deviation until the anti-deviation piece 4 completely recovers and deforms and is worn, so that the anti-deviation piece does not lose efficacy, and the service life of the product is prolonged.
Example two:
as shown in fig. 5-8, unlike the first embodiment, the deviation preventing member 4 of the second embodiment includes a compensation structure 41, and when the contact surface of the deviation preventing member 4 with the wheel shaft 1 is worn, the compensation structure 41 pushes the deviation preventing member 4 toward the wheel shaft 1, so that the deviation preventing member 4 is kept in contact with the wheel shaft 1.
The compensation structure 41 pushes the deviation preventing part 4 towards the direction of the wheel shaft 1 under the condition that the deviation preventing part 4 is worn by a certain amount, so that the deviation preventing part 4 is continuously kept in contact with the wheel shaft 1, the wheel is continuously prevented from being in a straight-going state, and sudden direction change deflection cannot occur.
Specifically, as shown in fig. 5, the compensating structure 41 is a spring disposed between the wheel frame 2 and the anti-bias member 4, and when the anti-bias member 4 is worn, the spring pushes the anti-bias member 4 to continue to contact the wheel axle 1.
When initially installed, the spring is compressed between the anti-deflection member 4 and the wheel frame 2, and the spring has a tendency to urge the anti-deflection member 4 in a direction towards the wheel axle 1. When the contact surface of the anti-deviation piece 4 and the wheel shaft 1 is worn, the spring pushes the anti-deviation piece 4 to move towards the center of the wheel shaft 1, so that the anti-deviation piece 4 is in close contact with the wheel shaft 1 again.
As shown in fig. 5, the wheel frame 2 includes a fixing frame 21, the anti-deviation component 4 is installed in the fixing frame 21, the two fixing frames 21 are symmetrically arranged along the axis of the wheel axle 1, and the fixing frame 21 is in clearance fit with the wheel axle 1.
Specifically, the fixing frame 21 is provided with an installation groove, part of the deviation preventing part 4 is embedded into the fixing frame 21, and the fixing frame 21 is in clearance fit with the wheel axle 1. The part of the deviation preventing piece 4 extending from the fixing frame 21 faces the wheel shaft 1 and is tightly attached to the wheel shaft 1.
As shown in fig. 6-7, a groove is opened in the deviation preventing 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 wheel axle 1 and connected by a fixing pin 23.
Alternatively, the fixing frame 21 may be a whole, and two deviation-preventing parts 4 are symmetrically installed on the fixing frame 21.
As shown in fig. 6, the 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 detachably connecting with the wheel assembly 20 of the child stroller, and the 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 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 and the wheel assembly 20 are detached, and the wheel axle 1 can be pulled out of the circular column.
As shown in fig. 6, the connection bracket 22 is provided with an insertion hole 221, and the anti-deviation member 4 at least partially passes through the insertion hole 221 and then contacts with the wheel axle 1.
After the deviation preventing piece 4 extends out of the fixing frame 21, the deviation preventing piece penetrates into the insertion hole 221 and is pressed with the surface of the wheel axle 1, and the deviation preventing piece 4 does not interfere with the insertion hole 221.
In the second embodiment, the spring is compressed between the anti-bias member 4 and the fixing frame 21 during initial installation, and the spring pushes the anti-bias member 4 towards the wheel shaft 1 and presses the wheel shaft 1. When the contact surface of the anti-deflection element 4 is worn, the spring pushes the anti-deflection element 4 further towards the wheel axle 1, so that the anti-deflection element 4 again presses against the wheel axle 1. And the anti-deviation piece 4 is not worn to lose efficacy until the spring is completely restored and deformed, so that the service life of the product is prolonged.
In the second embodiment, the deviation preventing part 4 can be made of a material which has wear resistance and no elasticity, and the deviation preventing part 4 can have better wear resistance and reduce wear; the spring (compensation structure) can compress the anti-deviation piece 4 and the 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. 9-12, different from the first embodiment, the deviation preventing member 4 of the third embodiment includes a compensation structure 41, and when the contact surface of the deviation preventing member 4 with the wheel shaft 1 is worn, the compensation structure 41 pushes the deviation preventing member 4 toward the wheel shaft 1, so that the deviation preventing member 4 is kept in contact with the wheel shaft 1.
The compensation structure 41 pushes the deviation preventing part 4 towards the direction of the wheel shaft 1 under the condition that the deviation preventing part 4 is worn by a certain amount, so that the deviation preventing part 4 is continuously kept in contact with the wheel shaft 1, and the wheel is continuously kept in a straight-going state, and sudden direction change deflection cannot occur.
As shown in fig. 11, the compensation structure 41 is a hollow part located inside the deviation preventing member 4; during initial installation, the solid part 42 of the deviation preventing piece 4 deforms and presses towards the hollow part; when the anti-deviation element 4 is worn, the hollow portion increases in the direction of the solid portion 42, so that the solid portion 42 at least partially deforms back and the anti-deviation element 4 continues to contact the wheel axle 1.
Specifically, the compensation structure 41 is a hollow structure with a narrow middle part and wide two ends, as shown in fig. 12, when initially installed, the compensation structure 41 is compressed and deformed, and the narrow middle part bends toward the center, so that the compensation structure 41 is compressed and shortened between the wheel shaft 1 and the fixing frame 21, and the solid part 42 is pressed against the wheel shaft 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 central narrow portion increases, so that the overall length of the compensating structure 41 increases, the solid portion 42 is pushed towards the wheel axle 1, so that the solid portion 42 is pressed against the wheel axle 1 again, and the compensating effect is achieved until the compensating structure 41 deforms back completely.
In the third embodiment, the deviation preventing member 4 and the compensating structure 41 are integrated, the compensating structure 41 is a hollow part hollowed out from the deviation preventing member 4, and the deviation preventing member 4 is made of a wear-resistant elastic deformation material.
As shown in fig. 11, the contact surface of the deviation preventing member 4 with the wheel axle 1 is provided with a dust-proof protrusion 43 and a dust-proof groove 44.
Specifically, the dust-proof protrusions 43 and the dust-proof grooves 44 extend along the axis of the wheel axle 1 and are arranged at intervals, and the dust-proof protrusions 43 contact with the wheel axle 1, so that dust can be prevented from adhering to the wheel axle 1. When dust adheres to the wheel axle 1, the dust-proof protrusions 43 peel off the wheel axle 1 and fall along the dust-proof grooves 44 during the rotation of the wheel axle 1.
Example four:
as shown in fig. 1, the stroller comprises the wheel deviation preventing structure 10 in any of the above embodiments, and the stroller comprises a stroller frame 30 and a plurality of wheel assemblies 20, wherein the plurality of wheel assemblies 20 comprises at least one front wheel, the wheel deviation preventing structure 10 is arranged on the front wheel, 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, the wheel assembly 20 includes a front wheel, and the wheel deviation preventing structure 10 is disposed only on the front wheel.
The three-wheel trolley can realize higher running speed, so that when the trolley runs straight quickly, a little obstacle exists, for example, the front wheel touches a small stone, and the condition that the front wheel deflects suddenly and turns to is easy to happen, so that the trolley is very dangerous.
In this embodiment, the wheel deviation preventing structure 10 is disposed on the front wheel for limiting the sudden deviation of the front wheel, so as to increase the safety performance and structural stability of the stroller.
In the invention, the anti-deviation piece is extruded between the wheel shaft and the wheel frame, so that the anti-deviation piece is in contact with the wheel shaft, and the rotation between the wheel shaft and the wheel frame is limited to a certain extent, thereby reducing the phenomenon that the wheels are suddenly turned, and improving the safety performance and the structural stability of the child handcart; when the steering is needed, the steering can be realized only by manually increasing the steering force on the handle of the trolley, and the unlocking operation is not needed to be carried out on the wheels independently, so that the operation is more convenient and efficient; simultaneously, the anti-deviation piece that the symmetry set up can reduce the probability that axle itself takes place to incline or warp to a certain extent to effectual improvement children's handcart's life.
The foregoing is considered as illustrative only of the principles and preferred embodiments of the invention. 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 (7)
1. A wheel deflection preventing structure (10) for a child stroller, comprising a wheel shaft (1) and a wheel frame (2), wherein the wheel shaft (1) is inserted into the wheel frame (2), the wheel shaft (1) is rotatably connected with the wheel frame (2) and is kept in a non-separated state, and the wheel deflection preventing structure is characterized in that a deflection preventing piece (4) is arranged between the wheel frame (2) and the wheel shaft (1), the deflection preventing piece (4) is symmetrically arranged along the axis of the wheel shaft (1) and keeps radial compression between the wheel frame (2) and the wheel shaft (1) along the wheel shaft (1);
the deviation preventing piece (4) comprises a compensation structure (41), and when the contact surface of the deviation preventing piece (4) and the wheel shaft (1) is worn, the compensation structure (41) pushes the deviation preventing piece (4) to the wheel shaft (1) so that the deviation preventing piece (4) is kept in contact with the wheel shaft (1);
the compensation structure (41) is a hollow part positioned inside the deviation preventing piece (4); during initial installation, the solid part (42) of the deviation preventing piece (4) deforms and presses towards the hollow part; when the deviation preventing piece (4) is worn, the hollow part is enlarged towards the solid part (42) to enable the solid part (42) to at least partially recover and deform, and the deviation preventing piece (4) is kept in contact with the wheel shaft (1).
2. Wheel deflection preventing structure (10) according to claim 1, characterized in that the deflection preventing member (4) is made of a wear-resistant elastically deformable material.
3. Wheel deflection preventing structure (10) according to any one of claims 1-2, wherein the wheel frame (2) comprises a fixing frame (21), the deflection preventing member (4) is mounted in the fixing frame (21), two fixing frames (21) are symmetrically arranged along the axis of the wheel axle (1), and the fixing frames (21) and the wheel axle (1) are in clearance fit.
4. Wheel deflection preventing structure (10) according to claim 3, characterized in that the two fixing frames (21) are connected by fixing pins (23).
5. Wheel deflection preventing arrangement (10) according to claim 3, wherein the wheel carrier (2) further comprises a connecting bracket (22), the fixing frame (21) is fixedly connected with the connecting bracket (22), the connecting bracket (22) is used for detachably connecting with a wheel assembly (20) of the child buggy, and the wheel axle (1) is inserted into the connecting bracket (22) and is in clearance fit with the connecting bracket (22).
6. The wheel deviation preventing structure of claim 5, wherein the connecting bracket (22) is provided with an insertion hole (221), and the deviation preventing part (4) at least partially penetrates through the insertion hole (221) and then contacts with the wheel shaft (1).
7. A child stroller comprising the wheel deviation preventing structure (10) according to any one of claims 1 to 6, the child stroller comprising a stroller frame (30) and a plurality of wheel assemblies (20), the plurality of wheel assemblies (20) comprising at least one front wheel on which the wheel deviation preventing structure (10) is disposed, the stroller frame (2) being fixed to a front side of the stroller frame (30).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110737635.XA CN113320589B (en) | 2021-06-30 | 2021-06-30 | Wheel deviation prevention assembly and child trolley |
| PCT/CN2022/101549 WO2023274155A1 (en) | 2021-06-30 | 2022-06-27 | Wheel anti-biasing assembly and child stroller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110737635.XA CN113320589B (en) | 2021-06-30 | 2021-06-30 | Wheel deviation prevention assembly and child trolley |
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| Publication Number | Publication Date |
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| CN113320589A CN113320589A (en) | 2021-08-31 |
| CN113320589B true CN113320589B (en) | 2023-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110737635.XA Active CN113320589B (en) | 2021-06-30 | 2021-06-30 | Wheel deviation prevention assembly and child trolley |
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| Country | Link |
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| CN (1) | CN113320589B (en) |
| WO (1) | WO2023274155A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113320589B (en) * | 2021-06-30 | 2023-01-24 | 东莞金旺儿童用品有限公司 | Wheel deviation prevention assembly and child trolley |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007083940A (en) * | 2005-09-26 | 2007-04-05 | Fuji Kiko Co Ltd | Vehicular steering device |
| CN212766428U (en) * | 2020-06-30 | 2021-03-23 | 东莞金旺儿童用品有限公司 | Anti-shaking structure of wheel and baby stroller frame |
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| DE3136203C2 (en) * | 1981-09-12 | 1985-05-23 | Max 8077 Baar Lippert | Swivel mounting for a roller of a vehicle |
| GB9310022D0 (en) * | 1993-05-15 | 1993-06-30 | Pihlens Alfred P R | Caster wheel assemblies |
| JP2002293108A (en) * | 2001-03-30 | 2002-10-09 | Torimu Plan Kk | Caster capable of preventing drift |
| CN200971028Y (en) * | 2006-09-28 | 2007-11-07 | 明门实业股份有限公司 | Positioning device for wheel on carriage |
| CN202806976U (en) * | 2012-10-11 | 2013-03-20 | 叶礼发 | Three-wheel child bicycle with novel steering mechanism |
| JP6494966B2 (en) * | 2014-09-22 | 2019-04-03 | コンビ株式会社 | Wheelbarrow casters and baby carriages equipped with the casters |
| DE202017100498U1 (en) * | 2017-01-31 | 2018-05-03 | Tente Gmbh & Co. Kg | Swivel castor for especially transport equipment |
| CN207416933U (en) * | 2017-09-11 | 2018-05-29 | 昆山威凯儿童用品有限公司 | A kind of front-wheel seat mechanism of stroller |
| CN108557448A (en) * | 2018-06-23 | 2018-09-21 | 桐乡市川泰商贸有限公司 | A kind of tubing interval feed mechanism |
| US20230059506A1 (en) * | 2019-12-16 | 2023-02-23 | Wonderland Switzerland Ag | Anti-shimmy device adapted for a wheel of a child carrier |
| CN212828636U (en) * | 2020-06-30 | 2021-03-30 | 东莞金旺儿童用品有限公司 | Quick detach subassembly and baby's shallow |
| CN213413917U (en) * | 2020-10-19 | 2021-06-11 | 昆山笑乐多儿童用品有限公司 | Children's barrow |
| CN215553500U (en) * | 2021-06-30 | 2022-01-18 | 东莞金旺儿童用品有限公司 | Front wheel anti-swing structure and children's handcart |
| CN113320589B (en) * | 2021-06-30 | 2023-01-24 | 东莞金旺儿童用品有限公司 | Wheel deviation prevention assembly and child trolley |
-
2021
- 2021-06-30 CN CN202110737635.XA patent/CN113320589B/en active Active
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2022
- 2022-06-27 WO PCT/CN2022/101549 patent/WO2023274155A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007083940A (en) * | 2005-09-26 | 2007-04-05 | Fuji Kiko Co Ltd | Vehicular steering device |
| CN212766428U (en) * | 2020-06-30 | 2021-03-23 | 东莞金旺儿童用品有限公司 | Anti-shaking structure of wheel and baby stroller frame |
Also Published As
| Publication number | Publication date |
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| WO2023274155A1 (en) | 2023-01-05 |
| CN113320589A (en) | 2021-08-31 |
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