Wheel orienting device and cart

Abstract

The utility model relates to the technical field of carts, in particular to a wheel orienting device and a cart. The wheel orienting device comprises a connecting rod, two orienting assemblies and two wheels. Each orientation assembly comprises an adapter, a seat body, a rotating block, a lifting block, an elastic piece and a bolt; the seat body is fixedly arranged at the lower part of the adapter; a protruding block is arranged at the other end of the rotating block and eccentrically arranged with the rotating block. The protruding block can abut against the top of the lifting block. The lifting block is arranged on the seat body through an elastic piece; the bolt is arranged on the lifting block; matching grooves are formed in the tops of the wheels; when the connecting rod is rotated forwards, the connecting rod drives the convex block of the rotating block to rotate to press the lifting block downwards, and the plug pin falls into the matched groove, so that the wheel is locked; when the connecting rod is reversely rotated, the elastic force enables the lifting block to ascend so as to drive the plug pin to be separated from the matched groove, and unlocking of the wheel is achieved. In this way, directional locking of the two wheels can be simply and efficiently achieved at the same time.

Description

Technical Field

[0001] This utility model relates to the field of trolley technology, and more specifically, to a wheel orientation device and a trolley. Background Technology

[0002] With the continuous improvement of people's living standards, strollers have become very common children's products. When going out for fun, placing children in a stroller and having an adult push them not only greatly facilitates adult supervision but also significantly reduces adult physical exertion, making it more comfortable and safer for both children and adults. Typically, to facilitate pushing, the front wheels of strollers are designed to be 360-degree steerable, allowing the wheels to turn freely.

[0003] However, in some special situations, the 360-degree steerable front wheels are actually difficult for the user to push. Existing locking mechanisms either rely solely on locking the horizontal axle, or lack a proper locking method for the 360-degree steerable front wheels, or can only lock each wheel individually. This results in cumbersome and inconvenient wheel locking. Utility Model Content

[0004] The purpose of this invention includes, for example, providing a wheel orientation device and a trolley that can simply and efficiently achieve simultaneous orientation and locking of two wheels.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] In a first aspect, this utility model provides a wheel orientation device, comprising:

[0007] The link consists of a connecting rod, two directional components, and two wheels; the two directional components and the two wheels are connected in a one-to-one correspondence; the two directional components are respectively located at both ends of the connecting rod along its length.

[0008] Each orientation component includes an adapter, and a base, a rotating block, a lifting block, an elastic element, and a pin disposed within the adapter; the base is fixed to the lower part of the adapter; the top of the wheel is rotatably connected to the base via a vertical pivot; the rotating block is rotatably disposed on the side of the adapter; one end of the rotating block is rotatably connected to the connecting rod, and the other end of the rotating block has a protrusion, which is eccentrically arranged with the rotating block; the protrusion can abut against the top of the lifting block; the lifting block is disposed on the base via an elastic element; the elastic element is configured to provide an elastic force that causes the lifting block to always move away from the base and rise vertically; the pin is disposed on the lifting block; the top of the wheel has a mating groove;

[0009] When the connecting rod rotates forward, the connecting rod drives the protrusion of the rotating block to rotate. Then the protrusion overcomes the elastic force of the elastic element and presses down on the lifting block, causing the pin to fall into the mating groove to lock the wheel.

[0010] When the linkage is reversed, the elastic element provides elastic force to raise the lifting block and drive the pin to disengage from the mating groove, thereby unlocking the wheel.

[0011] In an optional embodiment, a support plate is provided on the base, and the lifting block has a through hole that extends vertically; the support plate passes through the through hole so that the lifting block can be vertically raised and lowered relative to the support plate; the bottom of the elastic member is provided on the support plate, and the top of the elastic member abuts against the top wall of the through hole.

[0012] In an optional embodiment, a pedal is also included; the pedal is connected to a linkage, and the pedal is configured to cause the linkage to rotate forward or backward by pressing the pedal.

[0013] In an optional embodiment, a sleeve is further included, with both ends of the sleeve fixed to the two directional components along its length; the connecting rod is located inside the sleeve.

[0014] In an optional embodiment, the orientation component further includes a limiting shaft; the limiting shaft is fixed to the sleeve; the rotating block has a circumferentially extending limiting groove, the limiting groove has a limiting block, the limiting block is offset from the rotating block; the limiting shaft is located in the limiting groove, and the limiting shaft can abut against the limiting block.

[0015] In an optional embodiment, the lifting block includes a column, and the pin is detachably disposed within the column.

[0016] In an optional embodiment, the pin is movably disposed within the inner cavity of the column; the column has a waist-shaped hole in the vertical direction, and the pin is provided with a pin shaft passing through the waist-shaped hole; the pin shaft is configured such that the pin can move relative to the top and bottom walls of the waist-shaped hole.

[0017] In an optional embodiment, the orientation component further includes a base plate having a guide hole; the pin can pass through the guide hole and be inserted into the mating groove.

[0018] In an optional embodiment, the protrusion includes a first inclined surface and a second inclined surface with a first included angle; the top of the lifting block includes a first abutting surface and a second abutting surface with a second included angle; the first included angle and the second included angle are the same, and when the wheel is unlocked, the first inclined surface fits into the first abutting surface and the second inclined surface fits into the second abutting surface.

[0019] Secondly, the present invention provides a trolley, the trolley including at least one wheel orientation device as described in any of the foregoing embodiments.

[0020] The beneficial effects of this utility model embodiment include, for example:

[0021] The wheel orientation device of this solution includes a connecting rod, two orientation components, and two wheels. The two orientation components are respectively located at both ends of the connecting rod along its length. Each orientation component includes an adapter, and within the adapter are a seat, a rotating block, a lifting block, an elastic element, and a pin. When the connecting rod rotates, it drives the rotating block to rotate, which then overcomes the elastic force of the elastic element, causing the lifting block to descend. The pin on the lifting block then falls into a mating groove on the top of the wheel, thus locking the wheel. Conversely, when the connecting rod is reversed, the elastic force of the elastic element causes the lifting block to rise, and simultaneously the pin rises and disengages from the mating groove, thus unlocking the wheel. Because the rotation of the connecting rod simultaneously operates the lifting and lowering of the pins of both orientation components, a single connecting rod action can lock / unlock both wheels, significantly improving the convenience and speed of wheel orientation locking. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the wheel orientation device installed on a trolley according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the wheel orientation device according to an embodiment of the present invention;

[0025] Figure 3 This is a partial structural schematic diagram of the wheel orientation device according to an embodiment of the present utility model;

[0026] Figure 4 This is a structural schematic diagram of the wheel orientation device according to another embodiment of the present utility model;

[0027] Figure 5 This is a partial structural schematic diagram of the lifting block portion of the wheel orientation device according to an embodiment of the present utility model;

[0028] Figure 6 This is a schematic diagram of the wheel and pin engagement structure of the wheel orientation device according to an embodiment of the present invention;

[0029] Figure 7 This is a structural schematic diagram of another state in which the wheel and the pin of the wheel orientation device of this utility model are engaged.

[0030] Icons: A - Vertical direction; 11 - Linkage rod; 12 - Wheel; 12a - Vertical pivot; 12b - Fitting groove; 13 - Pedal; 14 - Sleeve; 15 - Limiting shaft; 100 - Adapter; 200 - Seat; 210 - Support plate; 300 - Rotating block; 310 - Protrusion; 311 - First inclined surface; 312 - Second inclined surface; 321 - Limiting groove; 322 - Limiting block; 400 - Lifting block; 410 - Through hole; 420 - Column; 421 - Waist-shaped hole; 422 - Spring; 431 - First abutment surface; 432 - Second abutment surface; 500 - Elastic element; 600 - Pin; 700 - Base plate; 710 - Guide hole. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0036] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0037] Please refer to Figures 1 to 6 This embodiment provides a wheel orientation device, including:

[0038] Link 11, two directional components and two wheels 12; the two directional components and the two wheels 12 are connected in a one-to-one correspondence; the two directional components are respectively set at both ends of the length direction of the link 11;

[0039] Each orientation component includes an adapter 100, and a base 200, a rotating block 300, a lifting block 400, an elastic element 500, and a pin 600 disposed within the adapter 100; the base 200 is fixed to the lower part of the adapter 100; the top of the wheel 12 is rotatably connected to the base 200 via a vertical pivot 12a; the rotating block 300 is rotatably disposed on the side of the adapter 100; one end of the rotating block 300 is rotatably connected to a connecting rod 11, and the other end of the rotating block 300 has a protrusion 310, which is eccentrically arranged with the rotating block 300; the protrusion 310 can abut against the top of the lifting block 400; the lifting block 400 is disposed on the base 200 via the elastic element 500; the elastic element 500 is configured to provide an elastic force that causes the lifting block 400 to always move away from the base and rise vertically; the pin 600 is disposed on the lifting block 400; the top of the wheel 12 has a mating groove 12b;

[0040] When the connecting rod 11 rotates forward, the connecting rod 11 drives the protrusion 310 of the rotating block 300 to rotate. Then the protrusion 310 overcomes the elastic force of the elastic element 500 and presses down on the lifting block 400, causing the pin 600 to fall into the mating groove 12b to lock the wheel 12.

[0041] When the reverse linkage 11 is reversed, the elastic element 500 provides elastic force to make the lifting block 400 rise and drive the pin 600 to disengage from the mating groove 12b, thereby unlocking the wheel 12.

[0042] In this design, the wheel-oriented device rotates the rotating block 300 when the connecting rod 11 rotates. This rotation overcomes the elastic force of the elastic element 500, causing the lifting block 400 to descend. The pin 600, located on the lifting block 400, then falls into the mating groove 12b on the top of the wheel 12, thus locking the wheel 12. Conversely, when the connecting rod 11 is reversed, the elastic force of the elastic element 500 causes the lifting block 400 to rise, and simultaneously, the pin 600 rises and disengages from the mating groove 12b, thus unlocking the wheel 12. It should be noted that the coordinated use of the elastic element 500 and the connecting rod 11 simplifies the unlocking operation and improves ease of use.

[0043] Because the linkage 11 can rotate simultaneously and operate the pins 600 of the two directional components to lift, it can lock / unlock two wheels 12 by moving one linkage 11, thus significantly improving the convenience and speed of directional locking of the wheels 12.

[0044] Please continue reading. Figures 1 to 7 To understand more structural details of the wheel orientation device, the figure shows that the adapter 100 has an interface for connecting to the frame at an angled upward, an interface for connecting to the adjacent orientation component on the upper side of the adapter 100, and an interface for mating with the wheel 12 at the bottom of the adapter 100.

[0045] from Figure 1 , Figure 2 and Figure 3 As can be seen, in an optional embodiment, the wheel orientation device further includes a pedal 13; the pedal 13 is connected to the link 11, and the pedal 13 is configured to cause the link 11 to rotate forward or backward by stepping on the pedal 13. The method of rotating the link 11 via the pedal 13 significantly improves the convenience of locking / unlocking operations.

[0046] In an optional embodiment, the wheel orientation device further includes a sleeve 14, with its two ends fixedly connected to two orientation components along its length; a connecting rod 11 is located inside the sleeve 14. Optionally, the sleeve 14 is fixedly connected to the adapters 100 of two adjacent orientation components, while the connecting rod 11 is rotatably disposed inside the sleeve 14. A slot (not shown in the figure) is cut in the middle of the sleeve 14 to facilitate the rotation of the connecting rod 11 by flipping the pedal 13. Here, the sleeve 14 serves two purposes: firstly, it provides stable support for the connection between the two adapters 100, increasing the structural stability of the positioning device; secondly, it protects the connecting rod 11.

[0047] from Figure 3 and Figure 4It can also be seen that, in an optional embodiment, the directional component further includes a limiting shaft 15; the limiting shaft 15 is fixed to the sleeve 14; the rotating block 300 has a circumferentially extending limiting groove 321, and a limiting block 322 is provided in the limiting groove 321, the limiting block 322 and the rotating block 300 being arranged at an offset; the limiting shaft 15 is located in the limiting groove 321, and the limiting shaft 15 can abut against the limiting block 322. That is, the limiting shaft 15 and the limiting groove 321 cooperate to limit the travel position of the rotating block 300 in the circumferential direction to correspond to the unlocked and locked states of the wheel 12, which helps to shorten the forward / reverse travel of the connecting rod 11, thereby improving the convenience of operation.

[0048] Please see Figure 3 , Figure 4 and Figure 5 As shown in the figure, in an optional embodiment, a support plate 210 is provided on the base 200, and the lifting block 400 has a through hole 410 extending in the vertical direction A. The support plate 210 passes through the through hole 410, allowing the lifting block 400 to rise and fall vertically relative to the support plate 210. The bottom of the elastic member 500 is disposed on the support plate 210, and the top of the elastic member 500 abuts against the top wall of the through hole 410. That is, the through hole 410 serves both as a storage location for the elastic member 500 and as a limiting structure for the relative rise and fall of the base 200 and the lifting block 400. This arrangement results in better space utilization and stability during movement.

[0049] from Figure 4 and Figure 5 It can also be seen that, in the optional embodiment, the protrusion 310 includes a first inclined surface 311 and a second inclined surface 312 with a first included angle; the top of the lifting block 400 includes a first abutting surface 431 and a second abutting surface 432 with a second included angle; the first included angle and the second included angle are the same, and when the wheel 12 is unlocked, the first inclined surface 311 fits with the first abutting surface 431, and the second inclined surface 312 fits with the second abutting surface 432. The fact that both the protrusion 310 and the lifting block 400 have two mating surfaces ensures that when the lifting block 400 is unlocked, it can be tightly connected to the rotating block 300 when the elastic force rises to its highest point, thereby ensuring the stability of the position of the rotating block 300 in the unlocked state, reducing the shaking of the connecting rod 11, and ensuring the stability of the orientation device.

[0050] from Figure 6 and Figure 7 It can also be seen that, in an optional embodiment, the lifting block 400 includes a column 420, and the pin 600 is detachably disposed within the column 420. This arrangement simplifies the assembly and maintenance of the pin 600, thereby extending the service life of the trolley.

[0051] Please continue reading. Figure 6 and Figure 7 As can also be seen from the figure, in an optional embodiment, the pin 600 is movably disposed within the inner cavity of the cylinder 420; the cylinder 420 has an oblong hole 421 along the vertical direction A, and the pin 600 is provided with a pin (not shown in the figure), which passes through the oblong hole 421; the pin is configured such that the pin 600 can move relative to the top and bottom walls of the oblong hole 421. Furthermore, the top of the cylinder 420 is closed, and the bottom of the cylinder 420 forms an opening; the top of the pin 600 is held against the top of the cylinder 420 by a spring 422. The spring 422 provides an elastic force that allows the pin 600 to always move downward away from the top of the cylinder 420.

[0052] When in use, when the pedal 13 is pressed down, the cylinder 420 drives the pin 600 to descend together, and the pin 600 is held against the top surface of the wheel 12 by the elastic force of the spring 422. When the wheel 12 rotates to the position where the mating groove 12b is directly opposite the pin 600, the pin 600 is engaged in the mating groove 12b by the elastic force to complete the locking of the wheel orientation.

[0053] When the pedal 13 is lifted, the cylinder 420 drives the pin 600 to rise, and at the same time the pin moves to the lower edge of the waist-shaped hole 421, and the pin 600 disengages from the mating groove 12b and rises to maintain a distance from the top surface of the wheel 12 (i.e. the pin 600 disengages from the top surface of the wheel 12), thereby realizing the unlocking of the wheel orientation.

[0054] Here, the pin, spring 422 and waist-shaped hole 421 work together to give the pin 600 a buffered stroke during the rising and falling of the lifting block 400, thereby reducing the impact between the pin 600 and the wheel 12 when unlocking / locking, thus providing the reliability and service life of the orientation device.

[0055] like Figure 6 and Figure 7 As shown, in an optional embodiment, the directional assembly further includes a base plate 700, which has a guide hole 710; the pin 600 can pass through the guide hole 710 and be inserted into the mating groove 12b. The guide hole 710 can guide the pin 600 to rise and fall, thereby ensuring the stability and reliability of locking / unlocking the wheel 12.

[0056] Secondly, this utility model provides a trolley, which includes at least one wheel orientation device according to any of the foregoing embodiments. Figure 1As can be seen, in this embodiment, the two wheels 12 at the front of the cart constitute one wheel orientation device, and the two wheels 12 at the rear of the cart constitute another wheel orientation device. Furthermore, all four wheels 12 are 360-degree freely rotatable. This achieves the effect of simultaneous orientation of both wheels at the front and rear of the cart. This facilitates orientation operations and, when locked, also promotes the cart's movement.

[0057] In summary, the present invention provides a wheel orientation device and a trolley, which have at least the following advantages:

[0058] The elastic force of the elastic element 500 causes the lifting block 400 to rise, while the pin 600 rises and disengages from the mating groove 12b, thereby unlocking the wheel 12.

[0059] The linkage 11 can rotate and simultaneously operate the pins 600 of the two directional components to lift and lower, thus achieving the effect of locking / unlocking two wheels 12 with the action of one linkage 11, which significantly improves the convenience and speed of directional locking of the wheels 12.

[0060] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A wheel orientation device, characterized in that, include: The link consists of a connecting rod, two directional components, and two wheels; the two directional components and the two wheels are connected in a one-to-one correspondence; the two directional components are respectively located at both ends of the connecting rod along its length. Each orientation component includes an adapter, and a base, a rotating block, a lifting block, an elastic element, and a pin disposed within the adapter; the base is fixed to the lower part of the adapter; the top of the wheel is rotatably connected to the base via a vertical pivot; the rotating block is rotatably disposed on the side of the adapter; one end of the rotating block is rotatably connected to the connecting rod, and the other end of the rotating block has a protrusion, which is eccentrically arranged with the rotating block; the protrusion can abut against the top of the lifting block; the lifting block is disposed on the base via an elastic element; the elastic element is configured to provide an elastic force that causes the lifting block to always move away from the base and rise vertically; the pin is disposed on the lifting block; the top of the wheel has a mating groove; When the connecting rod rotates forward, the connecting rod drives the protrusion of the rotating block to rotate. Then the protrusion overcomes the elastic force of the elastic element and presses down on the lifting block, causing the pin to fall into the mating groove to lock the wheel. When the linkage is reversed, the elastic element provides elastic force to raise the lifting block and drive the pin to disengage from the mating groove, thereby unlocking the wheel.

2. The wheel orientation device according to claim 1, characterized in that: The base is provided with a support plate, and the lifting block has a through hole that extends vertically. The support plate passes through the through hole so that the lifting block can be vertically raised and lowered relative to the support plate. The bottom of the elastic element is provided on the support plate, and the top of the elastic element abuts against the top wall of the through hole.

3. The wheel orientation device according to claim 1, characterized in that: It also includes a pedal; the pedal is connected to a linkage, and the pedal is configured to cause the linkage to rotate forward or backward by stepping on the pedal.

4. The wheel orientation device according to claim 1, characterized in that: It also includes a sleeve, the two ends of which are fixed to the two directional components along their length; the connecting rod is located inside the sleeve.

5. The wheel orientation device according to claim 4, characterized in that: The orientation component further includes a limiting shaft; the limiting shaft is fixed to the sleeve; the rotating block has a circumferentially extending limiting groove, the limiting groove has a limiting block, the limiting block is offset from the rotating block; the limiting shaft is located in the limiting groove, and the limiting shaft can abut against the limiting block.

6. The wheel orientation device according to claim 1, characterized in that: The lifting block includes a column, and the pin is detachably disposed inside the column.

7. The wheel orientation device according to claim 6, characterized in that: The pin is movably disposed within the inner cavity of the column; the column has a waist-shaped hole in the vertical direction, and the pin is provided with a pin shaft that passes through the waist-shaped hole; the pin shaft is configured such that the pin can move relative to the top and bottom walls of the waist-shaped hole.

8. The wheel orientation device according to claim 1, characterized in that: The orientation component also includes a base plate, which has a guide hole; the pin can pass through the guide hole and then be inserted into the mating groove.

9. The wheel orientation device according to claim 1, characterized in that: The protrusion includes a first inclined surface and a second inclined surface with a first included angle; the top of the lifting block includes a first abutting surface and a second abutting surface with a second included angle; the first included angle and the second included angle are the same, and when the wheel is unlocked, the first inclined surface fits into the first abutting surface and the second inclined surface fits into the second abutting surface.

10. A trolley, characterized in that: The trolley includes the wheel orientation device according to any one of claims 1-9.

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