Quick-release device for wheels and trolley

Abstract

The utility model discloses a quick release device for a wheel and a handcart, the quick release device comprises a mounting seat, a first cavity and a second cavity are arranged, the first cavity is used for connecting a connecting shaft of a frame, and the connecting shaft can extend into the second cavity; the pressing piece is installed in the second cavity, the pressing piece can move in the second cavity, the pressing piece can move in a reciprocating mode in the axis extending direction of the second cavity, the pressing piece is provided with a lock shaft assembly, and the lock shaft assembly can fix the connecting shaft to the installation base; when the pressing piece is close to the first cavity, the pressing piece can enable the lock shaft assembly to be in an unlocking state, and the connecting shaft and the wheel are unlocked; when the pressing piece is far away from the first cavity, the pressing piece can enable the lock shaft assembly to be in a locked state, and the connecting shaft and the wheel are locked. The trolley comprises a quick-release device; the frame is provided with a connecting shaft; the quick-release device is fixed on a hub of the wheel, and the connecting shaft is connected with the quick-release device.

Description

Technical Field

[0001] This utility model relates to the field of handcart manufacturing technology, and in particular to a quick-release device for wheels and a handcart. Background Technology

[0002] A handcart is a transport vehicle pushed or pulled by human power; it is the ancestor of all vehicles. Although handcart material handling technology has continuously developed, handcarts remain an indispensable transport tool. Handcarts are widely used in production and daily life because they are inexpensive, easy to maintain, convenient to operate, and lightweight. They can work in places where motor vehicles are inconvenient to use and are very convenient for moving lighter items over short distances.

[0003] In daily life, when not using a handcart, people usually need to store it to avoid taking up space. However, even if some handcarts are foldable, the wheels are not detachable or are difficult to remove, so even after the main body of the handcart is folded, the wheels are still difficult to remove, resulting in a lot of space being occupied. Utility Model Content

[0004] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, this utility model proposes a quick-release device for wheels and a handcart, wherein the handcart uses the quick-release device of this application, which enables the quick assembly and disassembly of the handcart wheels, and has a simple and practical structure.

[0005] In a first aspect, a quick-release device for a wheel according to an embodiment of the present invention includes:

[0006] The mounting base is provided with a first cavity and a second cavity. The first cavity is connected to the second cavity. The first cavity is used to connect the connecting shaft of the frame, and the connecting shaft can extend into the second cavity.

[0007] The pressing component is installed in the second cavity. The pressing component can move within the second cavity and can reciprocate along the axial extension direction of the second cavity. The pressing component is provided with a locking shaft assembly, which can fix the connecting shaft on the mounting base.

[0008] When the pressing member approaches the first cavity, the pressing member can put the locking shaft assembly in the unlocked state, thus unlocking the connecting shaft from the wheel;

[0009] When the pressing member moves away from the first cavity, it can lock the locking shaft assembly, thus locking the connecting shaft to the wheel.

[0010] A quick-release device for wheels according to an embodiment of the present invention has at least the following advantages: The quick-release device of this application achieves rapid assembly and disassembly of the connecting shaft and the wheel by operating a pressing member. Specifically, the mounting base includes a first cavity and a second cavity. The first cavity is connected to the connecting shaft of the frame. The pressing member can reciprocate along the axis in the second cavity and is fixed to the connecting shaft by a locking shaft assembly. When the user operates the pressing member, causing it to move axially, the locking shaft assembly locks or unlocks the connecting shaft, thereby achieving the assembly and disassembly of the wheel and the frame. The user can complete this without additional tools, and it can be done with one hand. The structure is simple and practical.

[0011] According to an embodiment of the present invention, a quick-release device for a wheel includes a locking shaft assembly consisting of two locking rods connected to a pressing member. When the pressing member approaches or moves away from the first cavity, it can drive the locking rods to approach or move away from the connecting shaft, thereby locking or unlocking the connecting shaft and the wheel.

[0012] According to an embodiment of the present utility model, a quick-release device for a wheel is provided in a second cavity, the two lock slots are mirror images of each other, two locking rods are respectively connected to the two lock slots, and the lock slots are provided with an upper locking part and an unlocking part.

[0013] Specifically, when the pressing member approaches the first cavity, it can drive the locking rod to move from the locking part to the unlocking part; when the pressing member moves away from the first cavity, it can drive the locking rod to move from the unlocking part to the locking part.

[0014] According to an embodiment of the present invention, a quick-release device for a wheel has a pressing member with a guide groove, and a locking rod passes through the locking groove and the guide groove in sequence.

[0015] According to an embodiment of the present invention, a quick-release device for a wheel is provided, wherein the guide groove and the locking groove are set at an angle.

[0016] According to an embodiment of the present invention, a quick-release device for a wheel is provided, wherein the inner wall of the second cavity is provided with a first positioning groove, and the outer wall of the pressing member is provided with a first positioning block, and the first positioning groove and the first positioning block are inserted into each other.

[0017] According to an embodiment of the present invention, a quick-release device for a wheel is provided in a second cavity, wherein one end of the return spring abuts against the bottom of the second cavity and the other end abuts against the bottom of the pressing member.

[0018] Secondly, a handcart according to an embodiment of the present utility model includes the above-mentioned quick-release device.

[0019] The frame is equipped with a connecting shaft, and the end of the connecting shaft is provided with a connecting groove;

[0020] The wheel has a quick-release device fixed to its hub, and the connecting shaft is connected to the quick-release device; the locking shaft assembly is connected to the connecting groove.

[0021] A handcart according to an embodiment of the present invention has at least the following advantages: The quick-release device of this application enables the rapid assembly and disassembly of the connecting shaft and the wheel by operating a pressing component. Specifically, the mounting base includes a first cavity and a second cavity. The first cavity is connected to the connecting shaft of the frame. The pressing component can reciprocate along the axis within the second cavity and is fixed to the connecting shaft by a locking shaft assembly. When the user operates the pressing component, causing it to move axially, the locking shaft assembly locks or unlocks the connecting shaft, thereby enabling the assembly and disassembly of the wheel and the frame. The user can complete this without additional tools, using only one hand, making the structure simple and practical.

[0022] According to an embodiment of the present utility model, a handcart has a wheel hub with a mounting cavity, a second positioning groove on the inner wall of the mounting cavity, and a second positioning block on the outer wall of the mounting base. The second positioning groove and the second positioning block are inserted into each other.

[0023] According to an embodiment of the present utility model, a handcart has a mounting cavity with a slot and a buckle on the outer wall of the mounting base, with the buckle matching and connecting with the slot.

[0024] 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

[0025] 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:

[0026] Figure 1 This is an exploded view of the structure of a quick-release device for wheels according to an embodiment of the present invention.

[0027] Figure 2 This is a front view of a quick-release device for a wheel according to an embodiment of the present invention;

[0028] Figure 3 This is a structural diagram of a quick-release device for a wheel according to an embodiment of the present invention;

[0029] Figure 4 This is an exploded view of the wheel and quick-release device according to an embodiment of the present utility model;

[0030] Figure 5 This is a cross-sectional view of the wheel and quick-release device according to an embodiment of the present utility model;

[0031] Explanation of reference numerals in the attached figures:

[0032] Mounting base 100; First cavity 110; Second cavity 120; First positioning groove 121; Locking groove 130; Locking part 131; Unlocking part 132; Second positioning block 140; Buckle 150;

[0033] Pressing element 200; guide groove 210; first positioning block 220;

[0034] Lock bar 300;

[0035] Connecting shaft 400;

[0036] Wheel 500; hub 510; mounting cavity 511; second positioning groove 5111; slot 512. Detailed Implementation

[0037] 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.

[0038] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying 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.

[0039] In the description of a utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first" and "second" are used, they are merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or the order of the indicated technical features.

[0040] 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.

[0041] This utility model provides a quick-release device for wheels, and also provides a handcart (not shown), which uses the quick-release device provided in this application.

[0042] Reference Figures 1 to 3The quick-release device includes a mounting base 100, which has a first cavity 110 and a second cavity 120. The first cavity 110 and the second cavity 120 are connected. The first cavity 110 is used to connect the connecting shaft 400 of the frame. The connecting shaft 400 can extend into the second cavity 120. A pressing member 200 is installed in the second cavity 120. The pressing member 200 can move within the second cavity 120 and can reciprocate along the axial extension direction of the second cavity 120. The pressing member 200 is provided with a locking shaft assembly, which can fix the connecting shaft 400 to the mounting base 100.

[0043] When the pressing member 200 approaches the first cavity 110, the pressing member 200 can put the locking shaft assembly in the unlocked state, and the connecting shaft 400 and the wheel 500 are unlocked.

[0044] When the pressing member 200 moves away from the first cavity 110, the pressing member 200 can lock the locking shaft assembly, thus locking the connecting shaft 400 and the wheel 500.

[0045] Specifically, as shown in the figure, the mounting base 100 has a locking groove 130 at one end near the second cavity 120, and the pressing member 200 has a guide groove 210 at a position corresponding to the locking groove 130. Furthermore, the locking shaft assembly consists of two locking rods 300, which pass through the locking groove 130 and the guide groove 210 sequentially. The two ends of the locking groove 130 are a locking part 131 and an unlocking part 132, respectively. When the locking shaft assembly and the connecting shaft 400 are locked, the locking rod 300 is located in the locking part 131; when the locking shaft assembly and the connecting shaft 400 are unlocked, the locking rod 300 is located in the unlocking part 132. When the user operates the pressing member 200, the pressing member 200 can move the locking rod 300 between the locking part 131 and the unlocking part 132, thus realizing the assembly and disassembly of the connecting shaft 400 and the wheel 500.

[0046] It should be noted that, as shown in the figure, the guide groove 210 and the locking groove 130 are set at an angle, and the end of the connecting shaft 400 is provided with a connecting groove that can engage with the locking rod 300.

[0047] Understandably, when the user presses the pressing member 200, the locking rod 300 moves within the guide groove 210. At the same time, the pressing member 200 can push the locking rod 300 from the locking part 131 to the unlocking part 132, and the two locking rods 300 move away from each other. At this time, the locking rod 300 is released from the connecting groove. At this time, the connecting shaft 400 and the wheel 500 are in the unlocked state, and the connecting shaft 400 can be separated from the mounting base 100.

[0048] When the pressing member 200 moves upward to reset, the pressing member 200 drives the locking rod 300 to move from the unlocking part 132 to the locking part 131. The two locking rods 300 approach each other until the locking rods 300 are re-engaged with the connecting groove. At this time, the connecting shaft 400 and the wheel 500 are in a locked state, and the connecting shaft 400 is fixedly connected to the mounting base 100.

[0049] Preferably, as shown in the figure, the lock slots 130 located on the same side and mirrored are a group, and the mounting base 100 is provided with two groups of lock slots 130. The two groups of lock slots 130 are arranged opposite each other to ensure that the locking rod 300 moves smoothly and to prevent the risk of single-point failure.

[0050] According to some embodiments of this application, the inner wall of the second cavity 120 is provided with a first positioning groove 121, and the outer wall of the pressing member 200 is provided with a first positioning block 220. The first positioning groove 121 and the first positioning block 220 are inserted into each other. The positioning groove and the positioning block prevent the pressing member 200 from rotating circumferentially, ensuring that the locking rod 300 is aligned with the locking groove 130. Furthermore, the insertion structure simplifies the installation process, and visual alignment is not required during blind installation.

[0051] According to some embodiments of this application, the second cavity 120 is provided with a return spring, one end of which abuts against the bottom of the second cavity 120, and the other end abuts against the bottom of the pressing member 200. It is understood that when the user releases the pressing member 200, the locking lever 300 can automatically return to the locked position under the action of the return spring, avoiding safety hazards caused by human error.

[0052] By applying the quick-release device provided in this application, the handcart can not only achieve quick assembly and disassembly of the wheels 500, but also improve the compatibility of wheels 500 of different sizes with connecting shafts 400.

[0053] Understandably, the locking rod 300, guide groove 210, and locking groove 130 work together to connect the pressing member 200 to the mounting base 100, preventing the pressing member 200 from disengaging from the mounting base 100. Simultaneously, when the locking rod 300 is located in the upper locking part 131, the locking rod 300 tends to move upwards under the action of the return spring, allowing it to stably engage with the connecting groove of the connecting shaft 400.

[0054] According to some embodiments of this application, the wheel hub 510 of the wheel 500 is provided with a mounting cavity 511, the inner wall of the mounting cavity 511 is provided with a second positioning groove 5111, and the outer wall of the mounting seat 100 is provided with a second positioning block 140. The second positioning groove 5111 and the second positioning block 140 are inserted into each other, which can realize blind installation guidance, shorten the installation time, and prevent the mounting seat 100 and the wheel hub 510 from rotating relative to each other when the wheel 500 rotates, thereby improving the transmission efficiency.

[0055] According to some embodiments of this application, the mounting cavity 511 is provided with a slot 512, and the outer wall of the mounting base 100 is provided with a buckle 150. The buckle 150 is matched and connected with the slot 512, enabling quick assembly and disassembly and reducing maintenance difficulty. 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 the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] 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 quick-release device for wheels, characterized in that, include: The mounting base is provided with a first cavity and a second cavity, the first cavity and the second cavity are in communication, the first cavity is used to connect the connecting shaft of the frame, and the connecting shaft can extend into the second cavity; A pressing member is installed in the second cavity. The pressing member is movable within the second cavity and can reciprocate along the axial extension direction of the second cavity. The pressing member is provided with a locking shaft assembly, which can fix the connecting shaft to the mounting base. When the pressing member approaches the first cavity, the pressing member can unlock the locking shaft assembly, thus unlocking the connecting shaft from the wheel. When the pressing member moves away from the first cavity, the pressing member can lock the locking shaft assembly, thus locking the connecting shaft to the wheel.

2. A quick-release device for a wheel according to claim 1, characterized in that, The locking shaft assembly consists of two locking rods, which are connected to the pressing member. When the pressing member moves closer to or away from the first cavity, it can drive the locking rods closer to or away from the connecting shaft, thereby locking or unlocking the connecting shaft and the wheel.

3. A quick-release device for a wheel according to claim 2, characterized in that, The second cavity is provided with a lock groove, and the two lock grooves are arranged in a mirror image. The two lock rods are respectively connected to the two lock grooves. The lock groove is provided with a locking part and an unlocking part. When the pressing member approaches the first cavity, it can drive the locking rod to move from the locking part to the unlocking part; When the pressing member moves away from the first cavity, it can drive the locking rod to move from the unlocking part to the locking part.

4. A quick-release device for a wheel according to claim 3, characterized in that, The pressing component is provided with a guide groove, and the locking rod passes through the locking groove and the guide groove in sequence.

5. A quick-release device for a wheel according to claim 4, characterized in that, The guide groove and the locking groove are set at an angle.

6. A quick-release device for a wheel according to claim 1, characterized in that, The inner wall of the second cavity is provided with a first positioning groove, and the outer wall of the pressing member is provided with a first positioning block. The first positioning groove is inserted into the first positioning block.

7. A quick-release device for a wheel according to claim 1, characterized in that, The second cavity is provided with a reset spring, one end of which abuts against the bottom of the second cavity, and the other end abuts against the bottom of the pressing member.

8. A handcart, characterized in that, Including a quick-release device for a wheel as described in any one of claims 1 to 7; The frame is provided with a connecting shaft, and the end of the connecting shaft is provided with a connecting groove; The wheel has a quick-release device fixed to its hub, a connecting shaft connected to the quick-release device, and a locking shaft assembly connected to the connecting groove.

9. A handcart according to claim 8, characterized in that, The wheel hub is provided with a mounting cavity, the inner wall of the mounting cavity is provided with a second positioning groove, and the outer wall of the mounting base is provided with a second positioning block. The second positioning groove is inserted into the second positioning block.

10. A handcart according to claim 9, characterized in that, The mounting cavity is provided with a slot, and the outer wall of the mounting base is provided with a buckle, which is matched and connected with the slot.

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