A stroller shock wheel

Abstract

The utility model discloses a cart shock absorbing wheel, including base, wheel frame, wheel and first coil spring. Base is provided with first positioning part, wheel frame rotates around first axis and is arranged on base, and wheel frame is provided with second positioning part, wheel rotates and is arranged wheel frame, first coil spring is arranged between base and wheel frame, and the first end of first coil spring can abut with base, and first positioning part is used for positioning the position of the first end of first coil spring, and the second end of first coil spring can abut with wheel frame, and second positioning part is used for positioning the position of the second end of first coil spring, wherein first positioning part and / or second positioning part are provided with connecting groove, and the corresponding end of first coil spring is embedded and fixed in connecting groove.

Description

Technical Field

[0001] This utility model relates to children's strollers, and in particular to a stroller shock-absorbing wheel. Background Technology

[0002] Strollers typically have shock-absorbing wheels at the bottom. Some existing shock-absorbing wheels include a base, wheel frame, wheels, and coil springs. The base is mounted on the bottom of the stroller, the wheel frame rotates relative to the base, the wheels are mounted on the wheel frame, and the coil springs are installed between the base and the wheel frame. The base positions the first end of the coil spring via a first positioning part, and the wheel frame positions the second end of the coil spring via a second positioning part. During use, the wheel frame repeatedly oscillates relative to the base, relying on the coil springs for shock absorption. Sometimes, the coil springs may detach from the first and second positioning parts, causing them to fall off and posing a risk of shock absorption failure. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a shock-absorbing wheel for a trolley, which can reduce the risk of shock absorption failure.

[0004] A stroller shock-absorbing wheel according to an embodiment of the present invention includes a base, a wheel frame, a wheel, and a first helical spring. The base is provided with a first positioning part; the wheel frame is rotatably mounted on the base about a first axis, and the wheel frame is provided with a second positioning part; the wheel is rotatably mounted on the wheel frame; the first helical spring is disposed between the base and the wheel frame, a first end of the first helical spring abutting against the base, the first positioning part positioning the first end of the first helical spring, a second end of the first helical spring abutting against the wheel frame, and the second positioning part positioning the second end of the first helical spring; wherein the first positioning part and / or the second positioning part are provided with a connecting groove, and the corresponding end of the first helical spring is embedded and fixed in the connecting groove.

[0005] The stroller shock-absorbing wheel according to the present invention has at least the following beneficial effects: the base positions the first end of the first helical spring through the first positioning part, and the wheel frame positions the second end of the first helical spring through the second positioning part, so that the installation position of the first helical spring is kept accurate; since at least one of the first positioning part and the second positioning part is provided with a connecting groove, the corresponding end of the first helical spring is embedded and fixed in the connecting groove, so that even if the wheel frame swings repeatedly relative to the base during the shock absorption process, the first helical spring is not easy to detach from the first positioning part and the second positioning part along its central axis, reducing the risk of the first helical spring falling off, thereby reducing the risk of shock absorption failure of the stroller shock-absorbing wheel.

[0006] According to some embodiments of the present invention, the connecting groove extends spirally along the central axis of the first helical spring, and the connecting groove is adapted to and connected to the corresponding end of the first helical spring.

[0007] According to some embodiments of the present invention, the first positioning part is configured as a first cylinder, the second positioning part is configured as a second cylinder, the first end of the first helical spring is sleeved on the outer periphery of the first cylinder, and the second end of the first helical spring is sleeved on the outer periphery of the second cylinder.

[0008] According to some embodiments of the present invention, the connecting groove is provided on the outer periphery of the second cylinder, and the first helical spring is embedded and fixed in the connecting groove along the radial direction of its central axis.

[0009] According to some embodiments of the present invention, the diameter of the first cylinder is smaller than the diameter of the second cylinder, and the diameter of the first cylinder is not greater than the inner diameter of the first helical spring.

[0010] According to some embodiments of the present invention, the first axis is arranged in a horizontal direction, the first positioning part is located above the second positioning part, and the first axis is perpendicular to the central axis of the first helical spring.

[0011] According to some embodiments of the present invention, a second helical spring is further included. The second helical spring is disposed between the base and the wheel frame. The first end of the second helical spring abuts against the base, and the second end of the second helical spring abuts against the wheel frame. The inner diameter of the second helical spring is larger than the outer diameter of the first helical spring. The central axis of the second helical spring is parallel to the central axis of the first helical spring. The second helical spring is sleeved on the outer periphery of the first helical spring.

[0012] According to some embodiments of the present invention, the wheel frame is provided with a positioning hole, the second end of the second helical spring is inserted into the positioning hole, and the second positioning part is connected to the bottom wall of the positioning hole.

[0013] According to some embodiments of the present invention, the base is provided with a limiting surface, the limiting surface is opposite to the outer periphery of the first end of the second helical spring, and the limiting surface is located between the second helical spring and the first axis.

[0014] According to some embodiments of the present invention, the base is provided with a rotation limiting structure, and the base limits the rotation range of the wheel frame relative to the base through the rotation limiting structure.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a three-dimensional schematic diagram of the shock-absorbing wheels of the trolley according to an embodiment of the present utility model; Figure 2 This is a cross-sectional schematic diagram of the shock-absorbing wheel of the cart according to an embodiment of the present utility model; Figure 3 This is an embodiment of the present utility model. Figure 2 A magnified view of a portion of point A; Figure 4 This is an exploded schematic diagram of the shock-absorbing wheel of the cart according to an embodiment of the present invention; Figure 5 This is an embodiment of the present utility model. Figure 4 A magnified view of a portion of point B.

[0017] Figure label: Base 100, first positioning part 110, limiting surface 120; Wheel frame 200, second positioning part 210, connecting groove 220, positioning hole 230; Wheel 300; First helical spring 400; Second helical spring 500; First axis 600. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, etc., are based on the orientation or positional relationship shown in the drawings. 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. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of technical features or their sequential relationship.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] Reference Figures 1 to 5 This utility model discloses a stroller shock-absorbing wheel, comprising a base 100, a wheel frame 200, a wheel 300, and a first helical spring 400. The base 100 is provided with a first positioning part 110; the wheel frame 200 is rotatably mounted on the base 100 about a first axis 600, and the wheel frame 200 is provided with a second positioning part 210; the wheel 300 is rotatably mounted on the wheel frame 200; the first helical spring 400 is disposed between the base 100 and the wheel frame 200, with its first end abutting against the base 100; the first positioning part 110 is used to position the first end of the first helical spring 400; the second end of the first helical spring 400 abuts against the wheel frame 200; and the second positioning part 210 is used to position the second end of the first helical spring 400; wherein the second positioning part 210 is provided with a connecting groove 220, and the corresponding end of the first helical spring 400 is embedded and fixed in the connecting groove 220.

[0023] The base 100 positions the first end of the first helical spring 400 via the first positioning part 110, and the wheel frame 200 positions the second end of the first helical spring 400 via the second positioning part 210, ensuring that the installation position of the first helical spring 400 remains precise. Since the second positioning part 210 is provided with a connecting groove 220, the corresponding end of the first helical spring 400 is embedded and fixed in the connecting groove 220. This ensures that even if the wheel frame 200 repeatedly swings relative to the base 100 during the shock absorption process, the first helical spring 400 is not easily dislodged from the first positioning part 110 and the second positioning part 210 along its central axis, reducing the risk of the first helical spring 400 falling off and thus reducing the risk of shock absorption failure of the trolley shock absorption wheel.

[0024] Specifically, the wheel frame 200 can be rotatably connected to the base 100 via a rotating shaft hole structure.

[0025] It is conceivable that in other embodiments, the connecting groove 220 may be provided in the first positioning part 110; or both the first positioning part 110 and the second positioning part 210 may be provided with the connecting groove 220.

[0026] In the embodiments, reference is made to Figure 3 and Figure 5 The connecting groove 220 extends spirally along the central axis of the first helical spring 400, and the connecting groove 220 is adapted to and connected to the corresponding end of the first helical spring 400. The end of the first helical spring 400 is spiral-shaped, and the connecting groove 220 extends spirally along the central axis of the first helical spring 400. When the end of the first helical spring 400 mates with the connecting groove 220, a large contact area and contact force are generated, making the connection relatively firm. Furthermore, the spiral connecting groove 220 can suppress loosening of the first helical spring 400 along the central axis, thereby preventing the first helical spring 400 from axially disengaging from the second positioning part 210, i.e., preventing the first helical spring 400 from falling off. The spiral connecting groove 220 also facilitates the assembly and connection of the first helical spring 400 and the second positioning part 210, making the assembly simple and the connection relatively firm.

[0027] In the embodiments, reference is made to Figure 5 The first positioning part 110 is configured as a first cylinder, and the second positioning part 210 is configured as a second cylinder. The first end of the first helical spring 400 is sleeved on the outer circumference of the first cylinder, and the second end of the first helical spring 400 is sleeved on the outer circumference of the second cylinder. The first positioning part 110 and the second positioning part 210, as described above, use cylinders inserted into the first helical spring 400 to position and install the first helical spring 400, which is simple in structure and easy to implement.

[0028] In the embodiments, reference is made to Figure 5 The second cylinder has a connecting groove 220 on its outer periphery, and the first helical spring 400 is embedded and fixed in the connecting groove 220 along the radial direction of its central axis. When the second positioning part 210 is the second cylinder, the spiral connecting groove 220 is provided on the outer periphery of the second cylinder, which makes it relatively easy to process the connecting groove 220 and facilitates the end of the first helical spring 400 to be embedded in the connecting groove 220.

[0029] Specifically, when the first helical spring 400 is assembled with the second positioning part 210, a screw-in method similar to a threaded connection is adopted. The end of the first helical spring 400 is screwed into the connecting groove 220, so that the end of the first helical spring 400 can be embedded in the helical connecting groove 220, and the end of the first helical spring 400 is sleeved on the outer periphery of the second positioning part 210.

[0030] It is conceivable that in some other embodiments, the first positioning part 110 and the second positioning part 210 can also be round holes; in this case, the connecting groove 220 can be provided on the side wall of the round hole and is spiral in shape. When the first helical spring 400 is assembled with the second positioning part 210, a similar spiral insertion method can also be adopted so that the end of the first helical spring 400 is embedded in the connecting groove 220.

[0031] In the embodiments, reference is made to Figure 5 The diameter of the first cylinder is smaller than the diameter of the second cylinder, and the diameter of the first cylinder is not greater than the inner diameter of the first helical spring 400. After the second end of the first helical spring 400 is fixed to the second positioning part 210, since the diameter of the first cylinder is not greater than the inner diameter of the first helical spring 400, the first end of the first helical spring 400 can be directly fitted onto the outer circumference of the first cylinder, thus facilitating the installation of the first end of the first helical spring 400 onto the first positioning part 110. The installation method is simple and quick, and the implementation and use effect are good.

[0032] In this embodiment, no connecting groove 220 is provided on the outer periphery of the first cylinder.

[0033] It is conceivable that in other embodiments, the connecting groove 220 may also be in other shapes, such as an annular groove, with the end of the first helical spring 400 embedded in the annular groove; or the connecting groove 220 may also be an irregular groove, with the end of the first helical spring 400 embedded in the irregular groove.

[0034] In the embodiments, reference is made to Figure 1 The first axis 600 is arranged horizontally, and the first positioning part 110 is located above the second positioning part 210. The first axis 600 is perpendicular to the central axis of the first helical spring 400. The above layout can make full use of the elastic force of the first helical spring 400 to dampen the wheel frame 200 and the base 100, and the damping effect is obvious.

[0035] In the embodiments, reference is made to Figure 3 and Figure 5 It also includes a second helical spring 500, which is disposed between the base 100 and the wheel frame 200. The first end of the second helical spring 500 abuts against the base 100, and the second end of the second helical spring 500 abuts against the wheel frame 200. The inner diameter of the second helical spring 500 is larger than the outer diameter of the first helical spring 400. The central axis of the second helical spring 500 is parallel to the central axis of the first helical spring 400. The second helical spring 500 is sleeved on the outer periphery of the first helical spring 400.

[0036] The second helical spring 500 can increase the shock absorption effect between the base 100 and the wheel frame 200. Furthermore, since the second helical spring 500 is sleeved on the outer periphery of the first helical spring 400, the layout between the two is more compact, which is conducive to the compact structure of the trolley shock-absorbing wheel and reduces material costs. Moreover, since the first helical spring 400 passes through the second helical spring 500, the first helical spring 400 can be used to prevent the second helical spring 500 from falling off, thereby improving the positional stability of the second helical spring 500 during the shock absorption process.

[0037] Specifically, in this application, the first end of the second helical spring 500 remains in contact with the base 100, and the second end remains in contact with the wheel frame 200, while the second end of the first helical spring 400 remains in contact with the wheel frame 200. Before the second helical spring 500 is compressed, the first end of the first helical spring 400 is not in contact with the base 100. After the second helical spring 500 is compressed, the first end of the first helical spring 400 then comes into contact with the base 100.

[0038] In the embodiments, reference is made to Figure 3 The wheel frame 200 is provided with a positioning hole 230. The second end of the second helical spring 500 is inserted into the positioning hole 230, and the second positioning part 210 is connected to the bottom wall of the positioning hole 230. The positioning hole 230 is provided so that the hole wall of the positioning hole 230 can be used to install and position the second end of the second helical spring 500, reducing the risk of misalignment of the second helical spring 500.

[0039] In the embodiment, reference Figure 3 The base 100 is provided with a limiting surface 120, which is opposite to the outer periphery of the first end of the second helical spring 500 and is located between the second helical spring 500 and the first axis 600. The limiting surface 120 can limit the first end of the second helical spring 500, reducing the risk of misalignment of the second helical spring 500.

[0040] In this embodiment, the base 100 is provided with a rotation limiting structure, which restricts the rotation range of the wheel frame 200 relative to the base 100. Providing the rotation limiting structure allows the wheel frame 200 to rotate relative to the base 100 within a predetermined angle range, resulting in greater stability during use.

[0041] Specifically, the rotation limiting structure may include two limiting blocks to restrict the rotation angle range of the wheel frame 200; or the rotation limiting structure may include an arc-shaped groove and a slider, the arc-shaped groove being formed around the first axis 600 in the base 100, the slider being fixedly connected to the wheel frame 200, and the slider being slidably connected to the arc-shaped groove. The two ends of the arc-shaped groove are used to limit the movement range of the slider, thereby limiting the rotation range of the wheel frame 200 relative to the base 100.

[0042] Specifically, it should be understood that both the first helical spring 400 and the second helical spring 500 are compression springs.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0044] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A type of shock-absorbing wheel for a cart, characterized in that, include: The base (100) is provided with a first positioning part (110); A wheel frame (200) is rotatably mounted on the base (100) about a first axis (600), and the wheel frame (200) is provided with a second positioning part (210); Wheel (300), rotating the wheel frame (200); A first helical spring (400) is disposed between the base (100) and the wheel frame (200). The first end of the first helical spring (400) can abut against the base (100). The first positioning part (110) is used to position the first end of the first helical spring (400). The second end of the first helical spring (400) can abut against the wheel frame (200). The second positioning part (210) is used to position the second end of the first helical spring (400). The first positioning part (110) and / or the second positioning part (210) are provided with a connecting groove (220), and the corresponding end of the first helical spring (400) is embedded and fixed in the connecting groove (220).

2. The trolley shock-absorbing wheel according to claim 1, characterized in that: The connecting groove (220) extends spirally along the central axis of the first helical spring (400), and the connecting groove (220) is adapted to and connected to the corresponding end of the first helical spring (400).

3. The trolley shock-absorbing wheel according to claim 1, characterized in that: The first positioning part (110) is configured as a first cylinder, the second positioning part (210) is configured as a second cylinder, the first end of the first helical spring (400) is sleeved on the outer periphery of the first cylinder, and the second end of the first helical spring (400) is sleeved on the outer periphery of the second cylinder.

4. The trolley shock-absorbing wheel according to claim 3, characterized in that: The second cylinder has a connecting groove (220) on its outer periphery, and the first helical spring (400) is embedded and fixed in the connecting groove (220) along the radial direction of its central axis.

5. The trolley shock-absorbing wheel according to claim 4, characterized in that: The diameter of the first cylinder is smaller than the diameter of the second cylinder, and the diameter of the first cylinder is not greater than the inner diameter of the first helical spring (400).

6. The trolley shock-absorbing wheel according to claim 3, characterized in that: The first axis (600) is arranged in a horizontal direction, the first positioning part (110) is located above the second positioning part (210), and the first axis (600) is perpendicular to the central axis of the first helical spring (400).

7. The trolley shock-absorbing wheel according to claim 3, characterized in that: It also includes a second helical spring (500), which is disposed between the base (100) and the wheel frame (200). The first end of the second helical spring (500) abuts against the base (100), and the second end of the second helical spring (500) abuts against the wheel frame (200). The inner diameter of the second helical spring (500) is larger than the outer diameter of the first helical spring (400). The central axis of the second helical spring (500) is parallel to the central axis of the first helical spring (400), and the second helical spring (500) is sleeved on the outer periphery of the first helical spring (400).

8. The trolley shock-absorbing wheel according to claim 7, characterized in that: The wheel frame (200) is provided with a positioning hole (230), the second end of the second helical spring (500) is inserted into the positioning hole (230), and the second positioning part (210) is connected to the bottom wall of the positioning hole (230).

9. The trolley shock-absorbing wheel according to claim 8, characterized in that: The base (100) is provided with a limiting surface (120), which is opposite to the outer periphery of the first end of the second helical spring (500) and is located between the second helical spring (500) and the first axis (600).

10. The trolley shock-absorbing wheel according to claim 1, characterized in that: The base (100) is provided with a rotation limiting structure, which limits the rotation range of the wheel frame (200) relative to the base (100).

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