A detachable wheel connection structure and a bag

Abstract

This utility model discloses a detachable wheel connection structure and a bag, relating to the field of wheel technology. The detachable wheel connection structure includes a wheel housing, a locking plate, and a connecting post. The wheel housing has a communicating locking groove and an unlocking hole. The locking plate is movably disposed in the locking groove and never protrudes from the outer end of the unlocking hole. The connecting post extends into the locking groove and is engaged and limited by the locking plate. The connecting post can disengage from the locking plate and wheel housing after the locking plate moves away from the unlocking hole to release the engagement. This detachable wheel connection structure allows the locking plate to be unlocked by applying external force through the unlocking hole, thus enabling the wheel seat to be detached. Because the locking plate never protrudes from the unlocking hole, the risk of accidental locking and wheel disassembly is reduced. When applied to bags, it reduces the risk of the locking plate being accidentally scratched by other objects during movement or transportation, causing the caster to accidentally detach.

Description

Technical Field

[0001] This utility model relates to the field of wheel technology, and in particular to a detachable wheel connection structure and a bag. Background Technology

[0002] In some luggage products, the casters are detachable, which makes it easy to replace the casters when they are damaged, or to remove the casters in certain situations to reduce the size of the product.

[0003] In one existing type of luggage, casters are connected to wheel seats, which in turn are connected to wheel housings, which are then connected to the luggage body. The wheel seats and wheel housings are detachably connected via a locking assembly. This locking assembly has a button protruding from the wheel housing; pressing the button controls the locking state of the assembly. However, the protruding button design also presents a risk of accidental disassembly, potentially causing the casters to detach during luggage movement and affecting normal use.

[0004] Therefore, how to reduce the risk of accidental disassembly of the disassembly wheel is a technical problem that needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a disassembly wheel connection structure and bag, which can reduce the risk of accidental disassembly of the disassembly wheel.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A detachable wheel connection structure includes a wheel housing, a locking plate, and a connecting post; the wheel housing is provided with a communicating locking groove and an unlocking hole; the locking plate is movably disposed in the locking groove and never protrudes from the outer port of the unlocking hole; the connecting post extends into the locking groove and is engaged and limited by the locking plate, and the connecting post can disengage from the locking plate and the wheel housing after the locking plate moves away from the unlocking hole to release the engagement.

[0008] Preferably, the locking piece is further fixed with a pressing block, the pressing block extends into the unlocking hole, and the outer end face of the pressing block is located in the middle of the unlocking hole; the pressing block can slide into the locking groove along the through direction of the unlocking hole so as to release the locking piece from the connecting post.

[0009] Preferably, the pressing block has a needle-like structure; or, the pressing block has a flat block-like structure.

[0010] Preferably, the connecting post includes a slot on its outer circumferential surface; a connecting hole is provided through the locking piece, the connecting post passes through the connecting hole, and a locking block is provided on the portion of the locking piece surrounding the connecting hole to engage with the slot; an elastic element is also provided between the locking piece and the groove wall of the locking groove, and under the constraint of the elastic restoring force of the elastic element, the locking block clamps the slot.

[0011] Preferably, the card block is integrally formed on the locking piece and is located on the outer periphery of the end of the connecting hole away from the unlocking hole; the groove surface of the connecting hole at the end away from the unlocking hole is a first arc-shaped surface, and the concave surface of the first arc-shaped surface faces the unlocking hole; the connecting post includes a cylindrical structure, the card slot is opened on the outer periphery of the cylindrical structure, and the diameter of the first arc-shaped surface is larger than the diameter of the connecting post.

[0012] Preferably, the locking piece includes a base and a locking pin, wherein a base hole is provided through the base; the locking pin is inserted into the base, and at least a portion of its structure extends into the base hole, forming the locking block; in the direction away from the unlocking hole, the connecting hole and the locking block are sequentially provided in the base hole.

[0013] Preferably, in the through direction of the base hole, the locking pin is centrally connected to the base hole, and the height of the groove is not less than the height of the locking pin and not greater than the height of the hole wall of the base hole.

[0014] Preferably, the locking pin is a straight rod structure.

[0015] Preferably, a cover plate is also fixed in the wheel housing, the cover plate covers the opening of the locking groove, and the connecting column has a conical head that extends into the conical groove of the cover plate.

[0016] A bag includes the detachable wheel connection structure as described above; it also includes a bag body and a wheel seat, the wheel shell is fixed to the bag body, and the wheel seat is connected to a caster; the connecting post is disposed on the wheel seat and protrudes from the side of the wheel seat near the wheel shell; the wheel shell is provided with a mounting hole communicating with the locking groove, and the portion of the connecting post protruding from the wheel seat can extend into or out of the locking groove through the mounting hole.

[0017] The detachable wheel connection structure provided by this utility model includes a wheel housing, a locking plate, and a connecting post; the wheel housing is provided with a communicating locking groove and an unlocking hole; the locking plate is movably disposed in the locking groove and never protrudes from the outer port of the unlocking hole; the connecting post extends into the locking groove and is locked and limited by the locking plate, and the connecting post can disengage from the locking plate and the wheel housing after the locking plate moves away from the unlocking hole to release the locking.

[0018] By applying the above-mentioned disassembly wheel connection structure, the locking plate can be unlocked by applying external force through the unlocking hole, thus disassembling the wheel seat. Furthermore, since the locking plate never protrudes from the unlocking hole, the risk of accidental locking of the locking plate and accidental disassembly of the disassembly wheel can be reduced. When applied to bags, it reduces the risk that the locking plate may be accidentally scratched by other objects during the movement or transportation of the bag, causing the caster to accidentally fall off. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0020] Figure 1 This is a first axle side view of a specific embodiment of the disassembly wheel connection structure provided by this utility model;

[0021] Figure 2 This is a second axle side view of a specific embodiment of the disassembly wheel connection structure provided by this utility model;

[0022] Figure 3 A first axle side view of the wheel housing portion after disassembly, which is a specific embodiment of the disassembly wheel connection structure provided by this utility model;

[0023] Figure 4 A second axle side view of the wheel housing portion after disassembly, which is a specific embodiment of the disassembly wheel connection structure provided by this utility model;

[0024] Figure 5 A side view of the disassembled wheel section in a specific embodiment of the disassembly wheel connection structure provided by this utility model;

[0025] Figure 6 An assembly drawing of the cover plate, locking piece, and connecting shaft for a specific embodiment of the disassembly wheel connection structure provided by this utility model;

[0026] Figure 7 An axial cross-sectional view of a specific embodiment of the disassembly wheel connection structure provided by this utility model;

[0027] Figure 8 This is an assembly drawing of the wheel housing and locking plate of a specific embodiment of the disassembly wheel connection structure provided by this utility model;

[0028] Figure 9 This is a schematic diagram of the engagement state of the connecting post and the locking piece in a specific embodiment of the disassembly wheel connection structure provided by this utility model;

[0029] Figure 10 A top view of the snap-fit ​​state of the connecting post and the locking piece in a specific embodiment of the disassembly wheel connection structure provided by this utility model;

[0030] Figure 11 A top view of the disengaged state of the connecting post and the locking piece in a specific embodiment of the disassembly wheel connection structure provided by this utility model;

[0031] Figure 12 An exploded view of a second specific embodiment of the disassembly wheel connection structure provided by this utility model;

[0032] Figure 13 A cross-sectional view of the snap-fit ​​state of the connecting post and the locking piece in a specific embodiment two of the disassembly wheel connection structure provided by this utility model;

[0033] Figure 14 A cross-sectional view of the disengaged state of the connecting post and the locking piece in a specific embodiment two of the disassembly wheel connection structure provided by this utility model.

[0034] Figure 15 A cross-sectional view of the assembly process of the connecting column in a specific embodiment two of the disassembly wheel connection structure provided by this utility model;

[0035] Figure 16 This is a cross-sectional view of the connecting column in the second specific embodiment of the disassembly wheel connection structure provided by this utility model when it is assembled in place;

[0036] Figure 17 This is a schematic diagram of the locking piece in a specific embodiment of the disassembly wheel connection structure provided by this utility model.

[0037] Figure label:

[0038] Wheel housing 1, mounting hole 11, locking groove 12, positioning groove 121, unlocking hole 13, outer port 131, receiving groove 14;

[0039] Cover plate 2, conical groove 21;

[0040] Connecting post 3, slot 31, tapered head 32;

[0041] Wheel seat 4, pin 41;

[0042] Locking component 5, locking piece 51, connecting hole 511, first arc surface 5111, locking block 512, pressing block 513, base 514, base hole 5141, locking pin 515, positioning block 516, elastic element 52.

[0043] Casters 6. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0045] The core of this utility model is to provide a disassembly wheel connection structure and a bag, which can reduce the risk of accidental disassembly of the disassembly wheel.

[0046] For a specific embodiment of the disassembly wheel connection structure provided by this utility model, please refer to Embodiment 1. Figures 1 to 11 It includes a wheel housing 1 and a locking assembly 5. The wheel seat 4 of the detachable wheel connection structure connects to the wheel body to form a detachable wheel.

[0047] In this embodiment of the application, the detachable wheel connection structure can be applied to bags, such as... Figure 1 As shown, the wheel housing 1 is fixedly connected to the main body of the bag, specifically to the lower part of the main body of the bag. The wheel seat 4 is connected to the caster 6, specifically to the lower part of the wheel seat 4. The main body of the bag can be made of hard or soft material. Of course, in other embodiments, the detachable wheel connection structure can also be applied to other devices, such as shopping carts, wheeled trash cans, etc.

[0048] The wheel housing 1 is provided with a connecting locking groove 12 and an unlocking hole 13. The locking piece 51 is movably disposed in the locking groove 12 and never protrudes from the outer port 131 of the unlocking hole 13; the connecting post 3 extends into the locking groove 12 and is locked and limited by the locking piece 51, and the connecting post 3 can disengage from the locking piece 51 and the wheel housing 1 after the locking piece 51 moves away from the unlocking hole 13 to release the locking.

[0049] Specifically, such as Figure 7 As shown, the connecting post 3 is disposed on the wheel seat 4 and is used to cooperate with the locking piece 51 in the locking assembly 5 to detachably connect the wheel housing 1. The connecting post 3 protrudes from the top surface of the wheel seat 4. A mounting hole 11 is provided through the bottom of the wheel housing 1, which is located above the wheel seat 4. A locking groove 12 is provided in the wheel housing 1, and the connecting post 3 extends upward into the locking groove 12 through the mounting hole 11. Figure 7 As shown, during the assembly process, the connecting post 3 extends from bottom to top into the mounting hole 11 and enters the locking groove 12.

[0050] It should be noted that, unless otherwise specified, in the embodiments of this application, the axial direction refers to the length direction of the connecting column 3. In this embodiment, the connecting column 3 is a cylinder or other body of revolution formed around a set straight line. In this case, the extension direction of the set straight line corresponds to the axial direction of the connecting column 3 structure. In other embodiments, the connecting column 3 can also be a prism.

[0051] like Figure 7 As shown, an unlocking hole 13 is provided through the side of the wheel housing 1, and the unlocking hole 13 connects to the locking groove 12. The locking piece 51 is movably disposed in the locking groove 12. In this embodiment, the locking piece 51 is slidably connected to the locking groove 12, specifically by linear sliding. In other embodiments, it can also be rotatably connected.

[0052] like Figure 9 As shown, the locking piece 51 is engaged with the connecting post 3, specifically with a locking structure on the outer circumferential surface of the connecting post 3. In this embodiment, the locking structure is a slot 31, into which a protrusion on the locking piece 51 extends to achieve engagement, thereby preventing the connecting post 3 from moving axially relative to the locking piece 51. In other embodiments, the locking structure can also be a protrusion that extends into the corresponding groove in the locking piece 51 to achieve engagement.

[0053] like Figure 7 As shown, the locking piece 51 never protrudes from the outer port 131 of the unlocking hole 13, so as to prevent objects outside the wheel housing 1 from accidentally disassembling the connecting post or mis-locking the locking piece 51.

[0054] It should be noted that the locking piece 51 does not protrude from the outer port 131 of the unlocking hole 13. Specifically, when the locking piece 51 moves to any permissible position, it does not protrude from the outer port 131 of the unlocking hole 13 at any point. Among them, for the unlocking hole 13, in its through-direction, the end closer to the outer surface of the wheel housing 1 is the outer end, and the other end is the inner end.

[0055] Additionally, one interpretation of "not protruding" here is that it does not protrude from the virtual surface formed at the outer port 131 of the unlocking hole 13, based on the curvature of the wheel housing 1 near the outer port 131. For example, if the wheel housing 1 is flat near the outer port 131 of the unlocking hole 13, then the virtual surface is a virtual plane coplanar with this flat plane. Alternatively, if the wheel housing 1 is curved near the outer port 131 of the unlocking hole 13, then the virtual surface is a virtual curved surface coplanar with this curved surface. For details, please refer to [reference needed]. Figure 16 In the embodiment shown, the dashed line at the right end represents the corresponding virtual arc surface, and the locking piece 51 never protrudes to the right from this virtual arc surface.

[0056] It should be noted that when the locking piece 51 is engaged with the connecting post 3, this typically corresponds to the limit position to which the locking piece 51 can move outward relative to the unlocking hole 13. When unlocking is required, an external force can be applied to the locking piece 51 through the unlocking hole 13 to drive it to unlock. Once the locking piece 51 moves inward relative to the unlocking hole 13 to the preset unlocking position, as... Figure 11 As shown, the locking piece 51 is released from the snap-fit ​​structure, that is, the axial constraint of the locking piece 51 on the connecting post 3 is released, and then the wheel housing 1 can be disengaged upward from the connecting post 3 and the wheel seat 4, so that the wheel seat 4 and the caster 6 can be disassembled from the wheel housing 1 connected to the body of the bag.

[0057] In this embodiment, the disassembly wheel connection structure can drive the locking plate 51 to unlock by applying external force to the locking plate 51 through the unlocking hole 13, thereby disassembling the wheel seat 4. Furthermore, since the locking plate 51 never protrudes from the unlocking hole 13, the risk of accidental disassembly and mislocking of the locking plate 51 can be reduced. When applied to bags, it reduces the risk that the locking plate 51 may be accidentally scratched by other objects during the movement or transportation of the bag, causing the caster 6 to accidentally fall off.

[0058] Furthermore, regarding the positional relationship between the locking piece 51 and the unlocking hole 13, such as... Figure 7 As shown, the end of the locking piece 51 near the unlocking hole 13 is a pressing block 513, which is a structure for directly receiving external force to unlock.

[0059] The pressing block 513 extends into the unlocking hole 13, with its outer end face located in the middle of the unlocking hole 13. At this time, the structure closest to the outer port 131 of the locking piece 51 is the pressing block 513. The outer end face of the pressing block 513 being located in the middle of the unlocking hole 13 ensures that the locking piece 51 will not protrude from the outer port 131 of the unlocking hole 13.

[0060] When unlocking is required, the pressing block 513 can slide into the locking groove 12 along the through direction of the unlocking hole 13, so that the locking piece 51 can move to the preset unlocking position. Specifically, the pressing block 513 and the unlocking hole 13 can slide together, either in close contact or with a slight gap, so that the unlocking hole 13 can guide the movement of the pressing block 513, specifically in a linear motion.

[0061] In some embodiments, to more reliably prevent accidental disassembly, the cross-section of the unlocking hole 13 can be set to a smaller value. Specifically, the cross-section refers to the section perpendicular to the through-hole direction of the unlocking hole 13. For example, the cross-section is a circle with a diameter less than 2 mm, or a rectangle with a side length less than 2 mm. Figure 1 As shown, the unlocking hole 13 is a micro-hole. At this time, the unlocking hole 13 cannot be pressed directly by the finger onto the pressing block 513. A fine needle or sharp tool needs to be inserted into the unlocking hole 13 and inserted a certain distance to contact and push the pressing block 513, so that the locking piece 51 can move to the preset unlocking position and achieve unlocking.

[0062] Of course, in other embodiments, such as Figure 13 As shown, the unlocking hole 13 can also be set to be slightly larger, for example, close to the cross-section of a finger, so that the locking piece 51 can be unlocked by pressing with a finger or tool, increasing the convenience of unlocking.

[0063] In some embodiments, the pressing block 513 has a needle-like structure, such as Figure 1 As shown, its length direction corresponds to the through direction of the unlocking hole 13. At this time, the size of the pressing block 513 and the micro-hole-shaped unlocking hole 13 are well matched. Specifically, the pressing block 513 is a cylindrical structure or a prism structure.

[0064] Alternatively, in other embodiments, such as Figure 12 As shown, the pressing block 513 is a flat, block-shaped structure. Specifically, the pressing block 513 is flat in the direction perpendicular to the unlocking hole 13, and the unlocking hole 13 is a corresponding strip-shaped hole in the direction perpendicular to the unlocking hole 13. In this case, the pressing block 513 is similar to a button structure, making it easy to press. Of course, the pressing block 513 can also be a prism, such as a hexagonal prism structure, a triangular prism structure, etc.

[0065] Of course, in other embodiments, regarding the positional relationship between the pressing block 513 and the unlocking hole 13, the pressing block 513 can also extend into the unlocking hole 13, and at least a portion of its outer end face is coplanar with the outer port 131 of the unlocking hole 13; or, the pressing block 513 can always be located inside the inner end of the unlocking hole 13, that is, completely detached from the unlocking hole 13.

[0066] Furthermore, regarding the structure of locking component 5, such as Figures 12 to 13 As shown, the locking component 5 specifically includes a locking piece 51 and an elastic element 52, with a pressing block 513 disposed on the locking piece 51. The locking piece 51 is engaged with the corresponding locking structure. The elastic element 52 is disposed between the locking piece 51 and the groove wall of the locking groove 12. Under the constraint of the elastic restoring force of the elastic element 52, the locking piece 51 is locked into the locking structure. Specifically, the locking block 512 is locked into the locking groove 31, which can ensure the reliability of the connection between the wheel seat 4 and the wheel housing 1. In addition, when unlocking, after the locking piece 51 is subjected to external force through the unlocking hole 13, it needs to overcome the elastic force of the elastic element 52 so that the locking piece 51 can move to the preset unlocking position.

[0067] In some embodiments, the locking piece 51 is an integrally formed structure. In this case, the pressing block 513 is integrally formed on the locking piece 51, or it can be inserted or glued to the locking piece 51.

[0068] In some embodiments, such as Figures 9 to 11 As shown, the snap-fit ​​structure is a slot 31, specifically an annular slot, located on the outer circumferential surface of the connecting post 3. A connecting hole 511 is provided through the locking piece 51, through which the connecting post 3 passes. A locking block 512 is provided on the portion of the locking piece 51 surrounding the connecting hole 511 to engage with the slot 31. The structure is simple and easy to manufacture. At the same time, the connecting post 3 has a moving space in the connecting hole 511, allowing the locking piece 51 to move from the position where it engages with the connecting post 3 to a preset unlocking position. Furthermore, the connecting hole 511 can constrain the movable stroke of the locking piece 51 relative to the connecting post 3.

[0069] In some embodiments, such as Figures 9 to 11 As shown, the locking block 512 is integrally formed on the locking piece 51 and is located on the outer periphery of the end of the connecting hole 511 away from the unlocking hole 13. The groove surface of the connecting hole 511 at the end away from the unlocking hole 13 is a first arc-shaped surface 5111, and the concave surface of the first arc-shaped surface 5111 faces the unlocking hole 13. Accordingly, the locking block 512 is also an arc-shaped structure. The connecting post 3 includes a cylindrical structure, and the slot 31 is opened on the outer periphery of the cylindrical structure. The diameter of the first arc-shaped surface 5111 is larger than the diameter of the connecting post 3.

[0070] At this time, under the elastic action of the elastic element 52, the slot 31 engages with the arc-shaped locking block 512, specifically, as shown in... Figure 9 and Figure 10 As shown, the lateral bottom of the slot 31 contacts the first arc-shaped surface 5111, generating a pre-tightening force on the connecting post 3. This ensures that, apart from a slight degree of freedom of axial rotation, the connecting post 3, wheel seat 4, and caster 6, the entire disassembly assembly has no other degrees of freedom relative to the wheel housing 1, the main body of the bag, and other fixed parts. When the locking piece 51 is subjected to external pressing force and overcomes the resistance of the elastic element 52 to move away from its current position, the locking block 512 disengages from the slot 31, as... Figure 11 As shown, the first arc-shaped surface 5111 can be completely dislodged from the slot 31, the connecting shaft 3 can be freed from axial movement, and the disassembled part can be separated from the fixed part.

[0071] In some embodiments, the connecting hole 511 is an oblong hole, and both ends of the unlocking hole 13 through direction are arc surfaces, one of which is a first arc surface 511. In this case, the two arc surfaces can limit the movable stroke of the locking piece 51 relative to the connecting post 3.

[0072] In some embodiments, the thickness of the locking piece 51 is less than the height of the slot 31 in the through direction of the connection hole 511, thereby facilitating the unlocking of the slot 31 and enabling the card block 512 to smoothly disengage from the slot 31.

[0073] In some embodiments, the elastic element is specifically a spring; in other embodiments, it may be a sheet spring. To provide a stable elastic force, such as Figure 10 As shown, the locking piece 51 has a positioning block 516 at the end away from the unlocking hole 13, and a spring is sleeved on the outside of the positioning block 516. Specifically, the end of the spring near the unlocking hole 13 is interference-fitted with the positioning block 516 for a fixed connection to ensure reliable connection. In addition, the locking groove 12 has a positioning groove 121 at the end away from the unlocking hole 13 to accommodate the spring.

[0074] In the second specific embodiment of this utility model, the locking component 5 differs from that in the above embodiments, as follows: Figures 12 to 17As shown, the locking assembly 5 includes a locking piece 51 and an elastic element 52. A connecting hole 511 is provided through the locking piece 51, through which the connecting post 3 passes. A locking block 512 is provided on the portion of the locking piece 51 surrounding the connecting hole 511 to engage with the locking groove 31. The elastic element 52 is located between the locking piece 51 and the groove wall of the locking groove 12. Under the constraint of the elastic restoring force of the elastic element 52, the locking block 512 clamps the locking groove 31 to ensure the reliability of the connection. Of course, in other embodiments, the elastic element 52 may not be provided, and the stability of the connection can also be ensured by the friction between the locking piece 51 and the locking groove 12.

[0075] In some embodiments, such as Figures 12 to 14 As shown, the locking piece 51 includes a base 514 and a locking pin 515. A base hole 5141 is provided through the base 514. The locking pin 515 is inserted into the base 514, and at least a portion of its structure extends into the base hole 5141, forming a locking block 512. In the direction away from the unlocking hole 13, a connecting hole 511 and a locking block 512 are sequentially provided in the base hole 5141. At this time, since the locking block 512 is formed on the locking pin 515, the shape, position, and size of the locking block 512 can be flexibly set according to the locking requirements of the slot 31.

[0076] In some embodiments, such as Figure 13 and Figure 14 As shown, in the through direction of the base hole 5141: the locking pin 515 is centrally connected to the base hole 5141, and the height of the groove 31 is not less than the height of the locking pin 515 and not greater than the height of the hole wall of the base hole 5141. Then the groove 31 can be built into the base hole 5141, which can ensure that the locking pin 515 is a locking and engaging structure.

[0077] In some embodiments, the locking pin 515 is a straight rod structure, specifically a prism structure, such as a rectangular square pin. In addition, the base hole 5141 has a square groove at the end away from the unlocking hole 13, which is adapted to the shape of the square pin to ensure the amount of the square pin exposed in the base hole 5141; the other end of the base hole 5141 can be a square groove surface or a rounded surface.

[0078] Furthermore, to facilitate the assembly of the wheel housing 1 and the wheel seat 4, such as... Figure 15 and Figure 16 As shown, the wheel housing 1 is a receiving groove 14 with a top opening, and a locking groove 12 is located in the receiving groove 14. The mounting hole 11 communicates with the locking groove 12. A cover plate 2 is also fixed in the wheel housing 1. The cover plate 2 is located in the slot above the locking groove 12. The top of the connecting post 3 is a conical head 32. Exemplarily, the conical head 32 is a conical or arc-shaped chamfered structure. The conical head 32 extends into the conical groove 21 at the bottom end of the cover plate 2.

[0079] Based on the guiding effect of the conical head 32, the ease of assembly can be reduced. During the process of installing the connecting post 3 from bottom to top onto the wheel housing 1, the conical head 32 first passes through the mounting hole 11 and then enters the locking groove 12. When the connecting hole 511 on the locking piece 51 is significantly misaligned with the mounting hole 11, the conical head 32 collides with the wall of the connecting hole 511, which can push the connecting hole 511 to move in the direction of the unlocking movement. Specifically, it can overcome the elastic force of the elastic element 52 to drive the locking piece 51 to move and enter the connecting hole 511. After installation, under the action of the restoring force of the elastic element 52, the locking block 512 is engaged in the locking groove 31, which limits the axial movement of the connecting post 3, thus completing the assembly of the connecting post 3 and the locking piece 51.

[0080] In addition, the conical head 32 extends into the conical groove 21 on the cover plate 2, which can constrain the conical head 32. Specifically, the two can have a small gap or transition fit, thereby achieving complete restriction of the radial degree of freedom between the connecting column 3 and the cover plate 2 contact section, achieving a tight fit, and playing an auxiliary fixing role for the connecting column 3.

[0081] In some embodiments, the cover plate 2 is screwed to the wheel housing 1. Specifically, the top of the wheel housing 1 is an upper-opening receiving groove 14, the locking groove 12 is provided in the receiving groove 14, and the cover plate 2 is received in the receiving groove 14.

[0082] Furthermore, such as Figure 12 As shown, the locking piece 51 is movable along the through direction of the unlocking hole 13 to lock or unlock the connecting post 3. Specifically, this direction of movement is perpendicular to the axial direction of the connecting post 3. The connecting post 3 enters or is mounted on the wheel housing 1 axially.

[0083] In some embodiments, in order to constrain the range of motion of the locking piece 51, the locking piece 51 is sandwiched between the cover plate 2 and the bottom of the receiving groove 14, and a straight slide can be formed through the limiting surface in the cover plate 2 and / or the receiving groove 14 to limit all degrees of freedom of the locking piece 51 except for the specified direction.

[0084] In addition to the aforementioned detachable wheel connection structure, this utility model also provides a bag, such as a trolley case. This bag includes a detachable wheel connection structure, which can specifically be the detachable wheel connection structure provided in any of the above embodiments. The beneficial effects can be referred to the respective embodiments above. Figure 1 and Figure 2 As shown, in the bag, the wheel housing 1 is fixed to the bag body, and the wheel seat 4 is connected to the caster 6. At this time, the caster 6 can be installed and removed from the bag by inserting and removing the connecting post 3 in the wheel housing 1.

[0085] Among them, the connecting column 3, wheel seat 4 and caster 6 are detachable from the main body of the bag.

[0086] Among them, caster 6 is an aircraft wheel, swivel wheel, or similar type of wheel. Caster 6 is connected to wheel seat 4, which can be done by riveting.

[0087] In order to achieve the assembly of the connecting column 3 and the wheel seat 4, such as Figure 5 and Figure 6 As shown, a socket is provided in the wheel seat 4. The bottom end of the connecting post 3 is inserted into the wheel seat 4 from top to bottom, and a connecting groove is provided on the outer circumferential surface of the connecting post 3. The pin 41 is inserted into the wheel seat 4 through a through hole and is engaged with the connecting groove, thereby fixing the connecting post 3 in the wheel seat 4, specifically axially. The pin 41 is specifically a pin. During disassembly, the pin 41 can be pulled out of the wheel seat 4, and then the connecting post 3 can be pulled upward from the wheel seat 4.

[0088] The wheel housing 1 is fixed to the main body of the bag, specifically by screws.

[0089] It should be noted that when an element is referred to as "fixing" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as "connecting" another element, it can be directly connected to the other element or there may be an intervening element. Furthermore, in the description of this utility model, unless otherwise stated, "multiple," "multiple roots," and "multiple groups" mean two or more.

[0090] The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0091] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0092] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0093] The foregoing has provided a detailed description of the detachable wheel connection structure and the bag / suitcase provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are merely for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A detachable wheel connection structure, characterized in that, The device includes a wheel housing (1), a locking plate (51), and a connecting post (3). The wheel housing (1) has a communicating locking groove (12) and an unlocking hole (13). The locking plate (51) is movably disposed in the locking groove (12) and never protrudes from the outer port (131) of the unlocking hole (13). The connecting post (3) extends into the locking groove (12) and is locked and limited by the locking plate (51). The connecting post (3) can disengage from the locking plate (51) and the wheel housing (1) after the locking plate (51) moves away from the unlocking hole (13) to release the locking.

2. The disassembly wheel connection structure according to claim 1, characterized in that, The locking piece (51) is also fixed with a pressing block (513), which extends into the unlocking hole (13). The outer end face of the pressing block (513) is located in the middle of the unlocking hole (13). The pressing block (513) can slide into the locking groove (12) along the through direction of the unlocking hole (13) so that the locking piece (51) is released from the connecting post (3).

3. The disassembly wheel connection structure according to claim 2, characterized in that, The pressing block (513) is a needle-like structure; or, the pressing block (513) is a flat block-like structure.

4. The disassembly wheel connection structure according to claim 1, characterized in that, The connecting post (3) includes a slot (31) on its outer peripheral surface; A connecting hole (511) is provided through the locking piece (51), the connecting post (3) passes through the connecting hole (511), and a locking block (512) is provided on the part of the locking piece (51) surrounding the connecting hole (511) to engage with the slot (31). An elastic element (52) is also provided between the locking piece (51) and the groove wall of the locking groove (12). Under the constraint of the elastic restoring force of the elastic element (52), the locking block (512) clamps the groove (31).

5. The disassembly wheel connection structure according to claim 4, characterized in that, The card block (512) is integrally formed on the locking piece (51) and is located on the outer periphery of the end of the connecting hole (511) away from the unlocking hole (13); The groove surface of the connecting hole (511) at the end away from the unlocking hole (13) is a first arc-shaped surface (5111), and the concave surface of the first arc-shaped surface (5111) faces the unlocking hole (13). The connecting post (3) includes a cylindrical structure, and the slot (31) is opened on the outer peripheral surface of the cylindrical structure. The diameter of the first arc-shaped surface (5111) is larger than the diameter of the connecting post (3).

6. The disassembly wheel connection structure according to claim 4, characterized in that, The locking piece (51) includes a base (514) and a locking pin (515). A base hole (5141) is provided through the base (514). The locking pin (515) is inserted into the base (514), and at least a portion of its structure extends into the base hole (5141) to form the locking block (512). In the direction away from the unlocking hole (13), the connecting hole (511) and the locking block (512) are sequentially provided in the base hole (5141).

7. The disassembly wheel connection structure according to claim 6, characterized in that, In the through direction of the base hole (5141), the locking pin (515) is centrally connected to the base hole (5141), and the height of the groove (31) is not less than the height of the locking pin (515) and not greater than the height of the hole wall of the base hole (5141).

8. The disassembly wheel connection structure according to claim 6, characterized in that, The locking pin (515) is a straight rod structure.

9. The disassembly wheel connection structure according to claim 4, characterized in that, A cover plate (2) is also fixed in the wheel housing (1). The cover plate (2) covers the opening of the locking groove (12). The connecting column (3) has a conical head (32) that extends into the conical groove (21) of the cover plate (2).

10. A type of bag, characterized in that, The system includes the detachable wheel connection structure as described in any one of claims 1 to 9; it also includes a bag body and a wheel seat (4), wherein the wheel shell (1) is fixed to the bag body and the wheel seat (4) is connected to a caster (6); the connecting post (3) is provided on the wheel seat (4) and protrudes from the side of the wheel seat (4) near the wheel shell (1); the wheel shell (1) is provided with a mounting hole (11) communicating with the locking groove (12), and the part of the connecting post (3) protruding from the wheel seat (4) can extend into or out of the locking groove (12) through the mounting hole (11).

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