Shock-absorbing cushioning structure for suitcase casters

Abstract

To provide a shock absorbing and cushioning structure for casters of a carry case to prevent damage. [Solution] The device comprises a wheel mounting seat 1, a wheel piece 2, an impact absorbing bracket 3 and an elastic impact absorbing mechanism 4, the wheel piece is rotatably connected to the impact absorbing bracket, the wheel mounting seat includes a carry case mounting end and a wheel mounting end, and on both sides of the wheel mounting end there are a hinge joint, a stroke limit groove and a buffering groove located between the two, the impact absorbing bracket is provided within the buffering groove and has at one end a hinge seat hingedly connected to the hinge joint and at the other end a limit block extending into the stroke limit groove, the stroke limit groove has upper and lower end surfaces which limit the rotation angle range of the limit block around the hinge joint, and the elastic impact absorbing mechanism is provided between the buffering groove and the impact absorbing bracket and drives the limit block of the impact absorbing bracket towards the lower end surface.

Description

[Technical field]

[0001] The present invention relates to the technical field of casters for carry cases, and in particular to a shock absorbing and cushioning structure for casters for carry cases. [Background technology]

[0002] To facilitate rolling of the suitcase, casters are usually attached to the bottom of the suitcase; if the suitcase does not have a shock-resistant structure to accommodate the casters, the force of vibrations will be transmitted to the suitcase when it travels over uneven roads, making the parts inside the suitcase more susceptible to damage and significantly shortening the service life of the suitcase as a whole.

[0003] For this reason, shock absorbing structures for casters of suitcases have been developed, but the problems with the existing technology are that, firstly, the shock absorbing structures are arranged on the exposed parts of the casters of suitcases, and exposed accessories such as springs have a short service life and are prone to breakdowns due to collisions with gravel or rubble on the road, and secondly, the assembly structure between the wheels of the suitcases and the shock absorbing structures is complicated, the manufacturing and assembly processes are inefficient, the maintenance and replacement of the accessories is difficult, and there are many accessories, which makes the structure less stable during use and prone to breakage.

[0004] Based on the above problems of the existing shock absorbing cushioning structure of the casters of the suitcase, the present invention proposes an improved design for the shock absorbing cushioning structure, so as to avoid damage to the casters of the suitcase and extend their service life, simplify and optimize the overall design of the casters of the suitcase, and ensure the simplification of the manufacture and assembly of the shock absorbing cushioning structure and the stability of its use. Summary of the Invention [Problem to be solved by the invention]

[0005] To overcome the above-mentioned shortcomings of the prior art, the present invention provides a shock absorbing and cushioning structure for casters of a carrying case. [Means for solving the problem]

[0006] The technical solution of the invention is as follows: an impact absorbing buffer structure for casters of a carry case, comprising: a wheel mounting seat, a wheel piece, an impact absorbing bracket, and an elastic impact absorbing mechanism; the wheel piece is rotatably connected to the impact absorbing bracket; the wheel mounting seat comprises a carry case mounting end and a wheel mounting end; both sides of the wheel mounting end are provided with a hinge joint, a stroke limit groove, and a buffer groove located between the two; the impact absorbing bracket is provided within the buffer groove and has at one end a hinge seat hingedly connected to the hinge joint, and at the other end a limit block extending into the stroke limit groove, the stroke limit groove having upper and lower end surfaces which limit the rotation angle range of the limit block around the hinge joint; and the elastic impact absorbing mechanism is provided between the buffer groove and the impact absorbing bracket, and drives the limit block of the impact absorbing bracket to move toward the lower end surface.

[0007] By adopting the above technical solution, through the structural arrangement of the buffer groove of the wheel mounting seat, the shock absorbing bracket is incorporated into the buffer groove, the hinge sheet at one end is hinged to the hinge joint, and the limit block at the other end extends into the stroke limit groove. The shock absorbing bracket is supported and driven by the elastic shock absorbing mechanism, and always surrounds the hinge joint and moves away from the carry case, i.e., rotates toward the side closer to the bottom end surface, which causes a gap between the shock absorbing bracket and the buffer groove.

[0008] When the carry case passes over an uneven road surface and vibrates, the elastic shock absorbing mechanism contracts against the unevenness of the road surface, the shock is cushioned by the stroke space where the shock absorbing bracket moves toward the upper end surface, and after the limit block resists the upper end surface, the body of the carry case directly receives the force from the unevenness of the road surface.

[0009] Similarly, after the caster overcomes an uneven surface in the road, the road surface in the direction of travel may suddenly drop. At this time, the caster temporarily loses support from the road surface, and the elastic shock absorbing mechanism rapidly extends without receiving any force, driving the shock absorbing mechanism to come into contact with the road surface or to quickly double-motion until it comes into contact with the lower end surface.

[0010] Based on the above structural principle, the space stroke provided by the stroke limit groove is used to reduce the height difference on uneven roads, reducing the undulation amplitude of the suitcase body on uneven roads and improving the running stability of the suitcase. In addition, the quick double action and cushioning of the shock absorbing bracket reduces the impact force of the suitcase falling when there is a height difference, stabilizing the stability on uneven roads.

[0011] The shock absorbing buffer amplitude of the caster is designed by controlling the distance design between the upper end surface and the lower end surface and controlling the turning stroke of the shock absorbing bracket.

[0012] At the same time, the structural design of the shock absorbing bracket according to this invention protects the shock absorbing and buffering mechanism in the buffer groove as a cover structure, thereby avoiding the problem of vulnerability caused by their exposure. In addition, the assembly structure between the shock absorbing bracket and the wheel mounting seat is simple, and can be assembled simply by inserting the limit block into the stroke limit groove and aligning the hinge seat and hinge joint, without any redundant and complicated connection structure, which improves production efficiency and makes the maintenance and replacement of parts more convenient and efficient.

[0013] In a further configuration of the present invention, the shock absorbing bracket is provided with a connecting post on its end surface facing the buffer groove, and the buffer groove is provided with a setting hole at a position corresponding to the connecting post, and the elastic shock absorbing mechanism is a spring, which is attached to the connecting post and presses the bottom of the setting hole to drive the limit block of the shock absorbing bracket to move toward the lower end surface.

[0014] Using the above technical solution, through the structural design of the setting hole, most of the spring body is accommodated in the setting hole, and the exposed end is fixed to the connecting pole of the shock absorbing bracket, and the spring is compressed or released by the swinging of the shock absorbing bracket.

[0015] In a further configuration of the present invention, a groove is provided on a side surface of the connecting post, and one end of the spring is engaged and fixed in the groove.

[0016] Using the above technical solution, the connecting rod is inserted into the spring for internal support, and the groove hooks the spring and fixes it in the axial direction, ensuring the stability of the dynamic connection between the spring and the shock absorbing bracket and preventing the spring from bending irregularly.

[0017] A further configuration of the present invention is that the shock absorbing bracket has a wheel axle hole between the hinge sheet and the limit block, the wheel axle hole being located near the connecting post, and the caster further includes a wheel axle, the wheel axle being rotationally fitted into the wheel axle hole and both ends being fixedly connected to the wheel pieces, respectively.

[0018] Using the above technical solution, the axle hole assembled with the wheel piece is located between the hinge seat and the limit block, the weight of the carry case is distributed to both sides of the shock absorbing bracket, and the stronger structure around the axle hole can withstand the force, thereby reducing the force on the limit block.

[0019] If the position of the spring and the wheel axle hole are designed to be outside the limit block and the limit block is located between the wheel axle hole and the hinge joint, excessive force will be applied to the limit block, making it more susceptible to damage.

[0020] In a further aspect of the present invention, an end surface of the shock absorbing bracket adjacent to the buffer groove matches the contour of the buffer groove.

[0021] Using the above technical solution, when the limit block of the shock absorbing bracket moves to the upper end surface, the end surface of the shock absorbing bracket fits and abuts on the contour of the buffer groove, and is designed to share the force applied to the limit block. The end surface of the shock absorbing bracket and the buffer groove are supported integrally, preventing damage to the limit block.

[0022] In a further configuration of the present invention, the upper end of the wheel mounting seat is provided with a mounting shaft hole and a mounting base body that can be fixed to a carry case.

[0023] In a further aspect of the present invention, the hinge sheet is provided with a slot that fits the hinge joint and limiting ears that extend on either side of the hinge joint, and the hinge sheet and hinge joint are provided with corresponding hinge holes and pin shafts. Using the above technical solution, the stability of the hinge connection is improved. Effect of the Invention

[0024] Compared with existing technologies, the advantageous effects of the present invention are as follows: the structural design of the shock absorbing bracket designed in the present invention, which is positioned between the wheel mounting seats, uses the structure of the spring and the structure of the stroke limit groove to realize the shock absorbing and cushioning function of the caster; the design of the assembly relationship between the cushioning groove, the shock absorbing bracket and the spring optimizes the overall structure of the caster; and the structural design of the wheel axle hole position avoids the problem of the limit block being easily damaged. [Brief description of the drawings]

[0025] [Figure 1] 1 is a structural diagram of one embodiment of the present invention. [Diagram 2] 2 is a structural diagram of an extended shock absorbing bracket according to an embodiment of the present invention; FIG. [Diagram 3] 2 is a cross-sectional view of an extended shock absorbing bracket according to an embodiment of the present invention; [Figure 4]4 is a structural diagram of a shock absorbing bracket in a contracted state according to an embodiment of the present invention; [Diagram 5] 4 is a cross-sectional view of a shock absorbing bracket in a contracted state according to an embodiment of the present invention; [Figure 6] 1 is a structural diagram of a wheel mounting seat according to an embodiment of the present invention; [Figure 7] 1 is a structural diagram of a shock absorbing bracket according to an embodiment of the present invention;

[0026] In order to better explain this embodiment, some components in the drawings may be omitted, enlarged or reduced in size, but these do not represent the size of the actual product, and the drawings are for illustrative purposes only and should not be understood as limitations on this patent. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] In order to make the technical solution of the present invention and its advantages clearer, the technical solution of the present invention will be described in more clear and complete detail in conjunction with the drawings, and it will be understood that the specific embodiments described herein are only some of the embodiments of the present invention, and are only used to explain the present invention, and do not limit the present invention. Please note that for the convenience of explanation, only the parts related to the present invention are shown in the drawings, and other related parts may refer to the overall design, and when there is no contradiction, the embodiments of the present invention and the technical features of the embodiments can be combined with each other to obtain new embodiments.

[0028] The invention will now be described in detail with reference to the accompanying drawings shown in Figures 1 to 7. The shock absorbing and cushioning structure for casters of a carry case includes a wheel mounting base 1, a wheel piece 2, a shock absorbing bracket 3, and an elastic shock absorbing mechanism 4, the wheel piece 2 is rotatably connected to the shock absorbing bracket 3, the wheel mounting base 1 includes a carry case mounting end 11 and a wheel mounting end 12, and on both sides of the wheel mounting end 12, a hinge joint 13, a stroke limit groove 14, and a cushioning groove 15 located between them are provided, and the shock absorbing bracket 3 is provided within the cushioning groove 15, A hinge seat 31 that is hinge-connected to the hinge joint 13 is provided at one end, and a limit block 32 that extends into the stroke limit groove 14 is provided at the other end, and the stroke limit groove 14 has an upper end surface 141 and a lower end surface 142 that limit the rotation angle range of the limit block 32 around the hinge joint 13. The elastic shock absorbing mechanism 4 is provided between the buffer groove 15 and the shock absorbing bracket 3, and drives the limit block 32 of the shock absorbing bracket 3 to move toward the lower end surface 142.

[0029] Due to the structural arrangement of the buffer groove 15 of the wheel mounting seat 1, the shock absorbing bracket 3 is incorporated into the buffer groove 15, with the hinge sheet 31 at one end hingedly connected to the hinge joint 13 and the limit block 32 at the other end extending into the stroke limit groove 14. Supported and driven by the elastic shock absorbing mechanism 4, the shock absorbing bracket 3 always surrounds the hinge joint 13 and moves away from the carry case, i.e., rotates to the side closer to the bottom end face, which creates a gap between the shock absorbing bracket 3 and the buffer groove 15.

[0030] When the carry case passes over an uneven road surface and vibrates, the elastic shock absorbing mechanism 4 contracts against the unevenness of the road surface, the shock is cushioned by the stroke space where the shock absorbing bracket moves toward the upper end surface 141, and after the limit block 32 resists the upper end surface 141, the body of the carry case directly receives the force from the unevenness of the road surface.

[0031] Similarly, after the caster overcomes an uneven surface in the road, the road surface in the direction of travel may suddenly drop. At this time, the caster temporarily loses support from the road surface, and the elastic shock absorbing mechanism 4 rapidly extends without receiving any force, driving the shock absorbing mechanism to come into contact with the road surface or to quickly double-motion until it comes into contact with the lower end surface 142.

[0032] Based on the above structural principle, the space stroke provided by the stroke limit groove 14 is used to reduce the height difference on uneven road surfaces, reducing the swell amplitude of the suitcase body on uneven surfaces and improving the running stability of the suitcase. In addition, the quick double action and cushioning of the shock absorbing bracket 3 reduces the impact force of the suitcase falling when a height difference occurs, and stabilizes stability on uneven road surfaces.

[0033] The shock absorbing and buffering amplitude of the caster is designed by controlling the distance design between the upper end surface 141 and the lower end surface 142 and controlling the turning stroke of the shock absorbing bracket 3.

[0034] At the same time, the structural design of the shock absorbing bracket 3 according to the present invention protects the shock absorbing and buffering mechanism in the buffer groove 15 as a cover structure, thereby avoiding the problem of vulnerability caused by their exposure. In addition, the assembly structure between the shock absorbing bracket 3 and the wheel mounting seat 1 is simple, and can be assembled simply by inserting the limit block 32 into the stroke limit groove 14 and aligning the hinge seat 31 with the hinge joint 13, and there is no redundant and complicated connection structure, which improves production efficiency and makes the maintenance and replacement of parts more convenient and efficient.

[0035] The shock absorbing bracket 3 has a connecting pillar 33 on its end surface facing the buffer groove 15, and the buffer groove 15 has a set hole 16 at a position corresponding to the connecting pillar 33. The elastic shock absorbing mechanism 4 is a spring 41, which is fitted into the connecting pillar 33 and presses the bottom of the set hole 16 to drive the limit block 32 of the shock absorbing bracket 3 to move it toward the lower end surface 142.

[0036] Due to the structural design of the setting hole 16, most of the body of the spring 41 is housed within the setting hole 16, and the exposed end is fixed to the connecting post 33 of the shock absorbing bracket 3, so that the spring 41 is compressed or released by the oscillation of the shock absorbing bracket 3. A groove 34 is provided on the side surface of the connecting post 33, and one end of a spring 41 is engaged with the groove 34 and fixed.

[0037] The connecting post 33 is inserted into and internally supports the spring 41, and the groove 34 hooks and fixes the spring 41 in the axial direction, thereby ensuring the stability of the dynamic connection between the spring 41 and the shock absorbing bracket 3 and preventing the spring 41 from bending irregularly.

[0038] The shock absorbing bracket 3 has a wheel axle hole 35 between the hinge sheet 31 and the limit block 32, the wheel axle hole 35 being located near the connecting post 33, and the caster further includes a wheel axle which is rotationally fitted into the wheel axle hole 35 and both ends of which are fixedly connected to the wheel pieces 2.

[0039] The axle hole 35 to which the wheel piece 2 is assembled is provided between the hinge sheet 31 and the limit block 32, the weight of the carry case is distributed to both sides of the shock absorbing bracket 3, and the stronger structure around the axle hole withstands the force, thereby reducing the force applied to the limit block 32.

[0040] If the positions of the spring 41 and the wheel axle hole 35 are designed to be outside the limit block 32 and the limit block 32 is located between the wheel axle hole 35 and the hinge joint 13, excessive force will be applied to the limit block 32, making it more susceptible to damage. The end face of the shock absorbing bracket 3 adjacent to the buffer groove 15 matches the contour of the buffer groove 15 .

[0041] When the limit block 32 of the shock absorbing bracket 3 moves to the upper end face 141, the end face of the shock absorbing bracket 3 fits into and comes into contact with the contour of the buffer groove 15, and is designed to share the force applied to the limit block 32. The end face of the shock absorbing bracket 3 and the buffer groove 15 support the limit block 32 integrally, preventing damage to the limit block 32. The upper end of the wheel mounting seat 1 is provided with a mounting shaft hole 17 and a mounting base main body 18 that can be fixed to a carry case.

[0042] The hinge sheet 31 has a slot 311 that fits the hinge joint 13 and limiting ears extending on either side of the hinge joint 13, and the hinge sheet 31 and the hinge joint 13 have corresponding hinge holes and pin shafts. This improves the stability of the hinge connection.

[0043] The structural design of this invention, in which the shock absorbing bracket 3 is positioned between the wheel mounting seat 1, uses the structure of the spring 41 and the structure of the stroke limit groove 14 to realize the shock absorbing and cushioning function of the caster, and the design of the assembly relationship between the cushioning groove 15, the shock absorbing bracket 3 and the spring 41 optimizes the overall structure of the caster, and the structural design of the position of the wheel axle hole 35 avoids the problem that the limit block 32 is easily damaged.

[0044] Up to now, the technical solutions of the present invention have been described in relation to the preferred embodiments shown in the drawings, and those skilled in the art understand that the protection scope of the present invention is obviously not limited to these specific embodiments, and without departing from the principle of the present invention, those skilled in the art can make equivalent modifications or substitutions to the relevant technical features, and the technical solutions after these modifications or substitutions fall within the protection scope of the present invention. [Explanation of symbols]

[0045] 1 Wheel mounting base 11 Carry case attachment end 12 Wheel mounting end 13 Hinge joint 14 Stroke limit groove 141 Upper end surface 142 Lower end surface 15 Buffer groove 16 set holes 17 Mounting shaft hole 18 Mounting base body 2 Wheel pieces 3 Shock absorbing bracket 31 Hinge Sheet 32 Limit Block 33 Connecting column 34 Groove 35 Wheel axle hole 4. Elastic shock absorbing mechanism 41 Spring.

Claims

1. 2. A shock absorbing and cushioning structure for casters of a carry case, comprising: a wheel mounting seat, a wheel piece, a shock absorbing bracket, and an elastic shock absorbing mechanism, the wheel piece being rotatably connected to the shock absorbing bracket, the wheel mounting seat including a carry case mounting end and a wheel mounting end, both sides of the wheel mounting end being provided with a hinge joint, a stroke limit groove, and a cushioning groove located between the two, the shock absorbing bracket being provided within the cushioning groove and having at one end a hinge seat hingedly connected to the hinge joint and at the other end a limit block extending into the stroke limit groove, the stroke limit groove having upper and lower end surfaces which limit the rotation angle range of the limit block about the hinge joint, and the elastic shock absorbing mechanism being provided between the cushioning groove and the shock absorbing bracket, and driving the limit block of the shock absorbing bracket to move toward the lower end surface.

2. 2. The shock absorbing structure for the casters of a carry case according to claim 1, characterized in that the shock absorbing bracket has a connecting post on its end surface facing the buffer groove, the buffer groove has a set hole at a position corresponding to the connecting post, the elastic shock absorbing mechanism is a spring, the spring is attached to the connecting post and presses the bottom of the set hole to drive the limit block of the shock absorbing bracket to move it toward the lower end surface.

3. 3. The shock absorbing and cushioning structure for casters of a carry case according to claim 2, wherein a groove is provided on a side surface of the connecting rod, and one end of the spring is engaged and fixed in the groove.

4. The shock absorbing and cushioning structure for casters of a carry case as described in claim 2 or 3, characterized in that the shock absorbing bracket has a wheel axle hole between the hinge sheet and the limit block, the wheel axle hole being located near the connecting post, and the caster further includes a wheel axle, the wheel axle being rotationally fitted into the wheel axle hole and both ends being fixedly connected to the wheel pieces, respectively.

5. 5. The shock absorbing structure for casters of a carry case according to claim 4, wherein an end face of the shock absorbing bracket adjacent to the buffer groove coincides with the contour of the buffer groove.

6. 6. The shock absorbing and cushioning structure for casters of a carry case according to claim 5, wherein an attachment shaft hole and an attachment base body are provided at an upper end of the wheel attachment seat, which can be fixed to the carry case.

7. 7. The shock absorbing and cushioning structure for casters of a carry case according to claim 6, characterized in that the hinge sheet is provided with a slot that fits the hinge joint and a limiting ear portion extending on both sides of the hinge joint, and the hinge sheet and the hinge joint are provided with corresponding hinge holes and pin shafts.

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