Limiting device and suspended ceiling storage rack

Abstract

The limiting device comprises a limiting shaft and a limiting part, the limiting shaft is connected with a winding shaft of the suspended ceiling storage rack and synchronously rotates along with the winding shaft, the limiting shaft is provided with external threads, and the limiting shaft is in threaded connection with a sliding part; the limiting component comprises a first limiting piece and a second limiting piece, the first limiting piece is used for limiting circumferential rotation of the sliding piece, and when the winding shaft drives the limiting shaft to rotate, the sliding piece moves in the axial direction of the limiting shaft; the second limiting piece abuts against the sliding piece to limit movement of the sliding piece and enable the limiting shaft to stop rotating when the winding shaft rotates till the cable is completely released. The ceiling storage rack adopts the limiting device. Therefore, the limiting device and the suspended ceiling storage rack can effectively prevent the winding shaft of the suspended ceiling storage rack from reversely winding the cable, and the storage platform is prevented from inclining.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of ceiling storage racks, in particular to a limiting device and a ceiling storage rack. BACKGROUND

[0002] The ceiling storage rack is used for being installed on the ceiling of a warehouse and used for placing or storing articles, in order to fully utilize the space in the warehouse, the ceiling storage rack in the prior art is mostly provided in a lifting type. For example, the patent application with the name of ceiling storage rack and the announcement number of CN116919084A applied by the applicant of the present case, which comprises a rotating shaft rotatably connected to the ceiling and a driving mechanism for driving the rotating shaft to rotate, and two winding parts are arranged on the rotating shaft, a cable is connected to the winding parts, and a storage platform is connected to the lower end of the cable, the driving mechanism drives the rotating shaft to rotate, so that the rotating shaft winds or releases the cable, and the storage platform is lifted or lowered, thereby playing a role of adjusting the height of the storage platform, and the driving mechanism is manually driven or electrically driven.

[0003] Taking the ceiling storage rack driven manually as an example, a gear box is connected to a fixed support at one end of the rotating shaft, a worm wheel coaxially connected to the rotating shaft is arranged in the gear box, and a worm is rotatably connected in the gear box, and the worm and the worm wheel are in transmission connection; one end of the worm is connected to a crank handle, the crank handle is rotated, the crank handle drives the worm to rotate, the worm drives the worm wheel to rotate, so that the worm wheel drives the transmission gear to rotate, the rotating shaft is rotated to wind or release the winding, and the lifting or lowering of the storage platform is realized.

[0004] The ceiling storage rack in the prior art has some deficiencies in actual use: after the storage platform is lowered to the point that the cable is completely released from the rotating shaft by rotating the crank handle, if the crank handle is continuously rotated in the same direction, the rotating shaft will reversely wind the cable, the winding stroke of the cable reversely wound is inconsistent with the winding stroke of the cable wound in the forward direction, thereby causing the storage platform to be inclined, and the articles on the storage platform have the risk of falling. CONTENT OF THE UTILITY MODEL

[0005] The technical problem to be solved by the present application is to overcome the defects of the above-mentioned related art, and to provide a limiting device which can effectively prevent the winding shaft of the ceiling storage rack from reversely winding the cable and avoid the inclination of the storage platform.

[0006] The technical solution of the present application is to provide a limiting device with the following structure: comprising

[0007] a limiting shaft connected with the winding shaft of the ceiling storage rack and synchronously rotating with the winding shaft, the limiting shaft has an external thread, and a sliding member is threadedly connected to the limiting shaft;

[0008] The limiting component comprises a first limiting part and a second limiting part. The first limiting part is used to limit the circumferential rotation of the sliding part and to make the sliding part move along the axial direction of the limiting shaft when the limiting shaft is driven to rotate by the winding shaft. The second limiting part abuts against the sliding part when the winding shaft is rotated to the point that the cable is completely released, so as to limit the movement of the sliding part and to stop the rotation of the limiting shaft.

[0009] In some embodiments, the first limiting part is provided with a guide groove, and the sliding part is provided with an insertion part inserted into the guide groove. When the sliding part moves along the axial direction of the limiting shaft, the insertion part abuts against the sidewall of the guide groove.

[0010] In some embodiments, the first limiting part is a hollow limiting box, and the limiting shaft and the sliding part are arranged in the limiting box. The limiting box is provided with the guide groove along the length direction.

[0011] In some embodiments, the top wall and the bottom wall of the limiting box are respectively provided with the guide groove, and the upper end and the lower end of the sliding part are respectively provided with the insertion part inserted into the guide groove of the top wall and the bottom wall of the limiting box.

[0012] In some embodiments, the end of the limiting box is provided with an end cover, and the end cover forms the second limiting part.

[0013] In some embodiments, the limiting shaft is coaxial with the winding shaft, and the limiting shaft is connected to one end of the winding shaft by a fastener. Alternatively, one end of the winding shaft extends outward along the axial direction and forms the limiting shaft.

[0014] In some embodiments, the end cover is provided with a shaft hole for the free end of the limiting shaft to extend outward, and the shaft hole forms a rotating support for the limiting shaft.

[0015] In summary, compared with the related art, the limiting device has the following advantages. The limiting device comprises a limiting shaft and a limiting component. The limiting shaft is connected with the winding shaft of the ceiling storage rack and rotates synchronously with the winding shaft. The sliding part is threadedly connected to the limiting shaft. The first limiting part of the limiting component can limit the circumferential rotation of the sliding part. Therefore, when the winding shaft of the ceiling storage rack is rotated to drive the limiting shaft to rotate synchronously, the first limiting part makes the sliding part move along the axial direction of the limiting shaft. When the winding shaft is rotated to the point that the cable is completely released, the sliding part moves to abut against the second limiting part of the limiting component. The second limiting part limits the movement of the sliding part and stops the rotation of the limiting shaft, so as to stop the continuous rotation of the winding shaft. Therefore, the limiting device can effectively prevent the winding shaft of the ceiling storage rack from reversely winding the cable and avoid the tilting of the storage platform, thereby improving the lifting safety of the ceiling storage rack.

[0016] Another technical solution of the present application is to provide a ceiling storage rack with the following structure, comprising a support, a storage platform, a winding shaft rotatably connected to the support, and a driving structure for driving the winding shaft to rotate, wherein the winding shaft is provided with a winding part, and a cable connected to the storage platform is wound on the winding part; the ceiling storage rack further comprises the limiting device of any one of the above embodiments.

[0017] In some embodiments, the limiting device is arranged at an end of the winding shaft away from the driving structure.

[0018] The ceiling storage rack adopts the limiting device of any one of the above embodiments, so that when the storage platform is lowered to the point where the cable on the winding part is completely released, the sliding member of the limiting device abuts against the second limiting member of the limiting part, so that the winding shaft stops rotating, thereby effectively preventing the winding shaft of the ceiling storage rack from reversely winding the cable and avoiding the storage platform from tilting, and improving the lifting safety of the ceiling storage rack. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 FIG. 1 is a structural schematic view of a limiting device according to some embodiments of the present application.

[0020] Figure 2 FIG. 2 is another angle structural schematic view of a limiting device according to some embodiments of the present application.

[0021] Figure 3 FIG. 3 is a sectional view of a limiting device according to some embodiments of the present application.

[0022] Figure 4 FIG. 4 is an assembly structural schematic view of a limiting device according to some embodiments of the present application.

[0023] Figure 5 FIG. 5 is a structural schematic view of a ceiling storage rack according to some embodiments of the present application.

[0024] Figure 6 FIG. 6 is an installation structural schematic view of a limiting device of a ceiling storage rack according to some embodiments of the present application.

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] 1, limiting shaft, 2, first limiting member, 200, guide groove, 201, second limiting member, 202, shaft hole, 3, sliding member, 300, insertion part, 301, threaded hole, 4, support, 5, winding shaft, 500, winding part, 6, storage platform, 7, cable, 8, driving structure, 800, crank. DETAILED DESCRIPTION

[0027] First, those skilled in the art should understand that the embodiments are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments as needed to adapt to specific application occasions.

[0028] In the description of the embodiments of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0029] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be that the first feature is directly above or obliquely above the second feature, or it only means that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be that the first feature is directly below or obliquely below the second feature, or it only means that the horizontal height of the first feature is less than that of the second feature.

[0030] The present application will be further described in detail below in conjunction with the drawings and specific embodiments.

[0031] Reference Figures 1-4 As shown in the drawings, the present application discloses a limiting device, which is connected to a ceiling storage rack. Specifically, the limiting device comprises a limiting shaft 1, a sliding piece 3 and a limiting component. The limiting shaft 1 is connected with the winding shaft 5 of the ceiling storage rack and rotates synchronously with the winding shaft 5, that is, when the winding shaft 5 of the ceiling storage rack rotates to wind or release the cable, the limiting shaft 1 rotates synchronously with the winding shaft 5. The outer circumferential wall of the limiting shaft 1 is provided with external threads in the axial direction, and the sliding piece 3 is provided with a threaded hole 301. The threaded hole 301 of the sliding piece 3 is threadedly connected to the limiting shaft 1. The limiting component comprises a first limiting piece 2 and a second limiting piece 201. The first limiting piece 2 is used to limit the circumferential rotation of the sliding piece 3 and to make the sliding piece 3 move along the axial direction of the limiting shaft 1 when the winding shaft 5 drives the limiting shaft 1 to rotate. The second limiting piece 201 abuts against the sliding piece 3 when the winding shaft 5 rotates to completely release the cable, so as to limit the movement of the sliding piece 3 and make the limiting shaft 1 stop rotating.

[0032] Therefore, in the above embodiment, when the winding shaft 5 of the ceiling storage rack is rotated to release the cable, the limiting shaft 1 is synchronously rotated, the circumferential rotation of the sliding piece 3 is limited by the first limiting piece 2, and the sliding piece 3 moves along the axial direction of the limiting shaft 1; when the winding shaft 5 is rotated to completely release the cable, the sliding piece 3 abuts against the second limiting piece 201 of the limiting part, the second limiting piece 201 limits the continuous movement of the sliding piece 3, so that the limiting shaft 1 stops rotating, and the winding shaft 5 stops rotating, thereby effectively preventing the winding shaft 5 of the ceiling storage rack from reversely winding the cable, avoiding the tilting of the storage platform, and improving the lifting safety of the ceiling storage rack.

[0033] In the embodiment, the limiting part is arranged on the side of the ceiling storage rack close to the winding shaft 5 and is fixedly connected to the support of the winding shaft 5 of the ceiling storage rack.

[0034] In other embodiments, the limiting part can also be fixedly connected to other supports by fasteners, such as the ceiling, the fixed frame of the ceiling, the wall, etc.

[0035] It can be understood that the first limiting piece 2 of the limiting part has various embodiments for limiting the circumferential rotation of the sliding piece 3, for example, the first limiting piece is arranged as a cuboid plate, the length direction of the plate is arranged to be parallel to the axial direction of the limiting shaft, the sliding piece is arranged as a polygon, and at least one side wall of the sliding piece is in sliding fit with the first limiting piece; or an elongated slot extending along the length direction of the first limiting piece is arranged on the side wall of the first limiting piece close to the sliding piece, and the sliding piece is at least partially inserted into the elongated slot and can slide in the elongated slot.

[0036] Specifically in the embodiment, as shown in Figure 1 , Figure 2 and Figure 4 , the first limiting piece 2 is provided with a guide slot 200, the sliding piece 3 is provided with an insertion part 300 inserted into the guide slot 200, and the insertion part 300 abuts against the side wall of the guide slot 200 when the sliding piece 3 moves along the axial direction of the limiting shaft 1. In other words, the insertion part 300 of the sliding piece 3 is in plug-in fit with the guide slot 200, so that the circumferential rotation of the sliding piece 3 is limited, and the sliding piece 3 can only slide along the length direction of the guide slot 200, and thus the sliding piece 3 slides along the length direction of the guide slot 200 when the limiting shaft 1 is rotated by the winding shaft 5.

[0037] In the above embodiment, the second limiting piece 201 of the limiting part is used to block or limit the axial movement of the sliding piece 3, and when the cable on the winding shaft 5 is completely released, the sliding piece 3 abuts against the second limiting piece 201, the movement of the sliding piece 3 is stopped, the limiting column 1 is stopped rotating under the thread cooperation between the sliding piece 3 and the limiting column 1, and thus the winding shaft 5 of the ceiling storage rack is stopped rotating.

[0038] It is easy to understand that in the above embodiment, the stroke of the sliding member 3 when moving to the limit position is limited to prevent the reverse winding of the cable on the winding shaft 5 after the cable is completely released on the winding shaft 5. In other words, based on the number of winding turns of the cable on the winding shaft, the stroke of the sliding member 3 on the limiting shaft 1 is set to limit the number of rotation turns of the winding shaft 5, thereby preventing the reverse winding of the cable on the winding shaft 5.

[0039] In the above embodiment, the second limiting member 201 of the limiting part can be independently provided and installed, or can be integrated with the first limiting member 2 or the limiting shaft 1, and the shape and connection position are not limited as long as the purpose of stopping the movement of the sliding member 3 by abutting against the sliding member 3 when the cable is completely released on the winding shaft 5 can be met.

[0040] Further in the present embodiment, as shown in Figure 2 , Figure 3 and Figure 4 , the first limiting member 2 is provided as a hollow limiting box, the limiting shaft 1 and the sliding member 3 are both arranged in the limiting box, and the limiting box is provided with a guide groove 200 along the length direction. That is, the sliding member 3 and the limiting shaft 1 are both arranged in the inner cavity of the limiting box, and the insertion part 300 of the sliding member 3 is inserted into and can slide in the guide groove 200. In this way, the structure of the limiting device is more compact, and it is convenient to install with the support 4 of the ceiling storage rack.

[0041] In the foregoing embodiment, in order to make the movement of the sliding member 3 more stable, the guide grooves 200 are respectively arranged on the top wall and the bottom wall of the limiting box, and the upper end and the lower end of the sliding member 3 are respectively provided with the insertion parts 300 inserted into the guide grooves 200 on the top wall and the bottom wall of the limiting box, so that the upper end and the lower end of the sliding member 3 are slidingly fitted in the guide grooves 200 on the top wall and the bottom wall of the limiting box.

[0042] Further in the present embodiment, the end of the limiting box is provided with an end cover, and the end cover forms the second limiting member 201. That is, when the limiting shaft 1 rotates synchronously with the winding shaft 5 to make the sliding member 3 move along the length direction of the guide groove 200 to abut against the end cover of the limiting box, the sliding member 3 stops moving, and under the action of the screw, the limiting shaft 1 stops rotating, and the winding shaft 5 stops rotating, so that the structure is simple and the production cost is low.

[0043] In other embodiments, a baffle limiting the movement of the sliding member 3 can also be connected on the inner wall of the limiting box, and when the winding shaft 5 rotates to completely release the cable, the sliding member 3 abuts against the baffle, and the baffle forms the second limiting member limiting the movement of the sliding member 3.

[0044] In order to make the limiting shaft 1 rotate more smoothly, avoid the limiting shaft 1 from swinging when starting or suddenly rotating, further in the embodiment, the end cover of the limiting box is provided with a shaft hole 202 for the free end of the limiting shaft 1 to extend outward, and the shaft hole 202 forms a rotating support for the limiting shaft 1. The rotating cooperation between the shaft hole 202 on the end cover and the free end of the limiting shaft 1 can avoid the outer end of the limiting shaft 1 from being suspended, so that the limiting shaft 1 rotates more smoothly.

[0045] It is not difficult to understand that in the above embodiment, the two ends of the limiting box are provided with end covers, the end cover of the end of the limiting box close to the winding shaft 5 forms the second limiting part 201, and the end cover of the end of the limiting box away from the winding shaft 5 is provided with the shaft hole 202 for the free end of the limiting shaft 1 to extend out; or the end cover of the end of the limiting box away from the winding shaft 5 can also form the second limiting part for blocking the movement of the sliding part.

[0046] In the embodiment, referring to Fig. 1, the limiting shaft 1 is coaxially arranged with the winding shaft 5, and the limiting shaft 1 is connected to one end of the winding shaft 5 through a fastener, or the limiting shaft 1 can be connected to the end of the winding shaft 5 through a coaxial connector. Figure 3

[0047] In other embodiments, the limiting shaft 1 can also be formed integrally with the winding shaft 5, that is, one end of the winding shaft 5 extends axially outward and forms the limiting shaft 1.

[0048] In other embodiments, the connection between the limiting shaft 1 and the winding shaft 5 can also be connected through a speed reducer or a speed reduction device, and the speed reducer or the speed reduction device is driven by a gear, so in this embodiment, the axis of the limiting shaft 1 and the axis of the winding shaft 5 can be arranged in parallel or coaxially.

[0049] Referring to Fig. 1, the limiting shaft 1 is coaxially arranged with the winding shaft 5, and the limiting shaft 1 is connected to one end of the winding shaft 5 through a fastener, or the limiting shaft 1 can be connected to the end of the winding shaft 5 through a coaxial connector. Figures 5-6 As shown in Fig. 1, another embodiment of the present application discloses a ceiling storage rack, which is used for being mounted on the ceiling of a warehouse, and the structure thereof comprises a support 4 fixedly connected to the ceiling, a storage platform 6, a winding shaft 5 rotatably connected to the support 4, and a driving structure 8 for driving the winding shaft 5 to rotate, the winding shaft 5 is provided with a winding part 500, and the winding part 500 is wound with a cable 7 connected to the storage platform 6; the ceiling storage rack further comprises the limiting device of any one of the above embodiments. The driving structure 8 is a worm gear transmission driving structure 8, the worm is driven to rotate through a crank 800, so as to drive the winding shaft 5 to rotate and wind or release the cable 7 through the worm gear. When the storage platform 6 is lowered to the cable 7 on the winding part 500 and is completely released, the sliding part 3 of the limiting device abuts against the second limiting part 201 of the limiting part, so that the winding shaft 5 stops rotating, thereby effectively preventing the winding shaft 5 of the ceiling storage rack from winding the cable 7 in the reverse direction, avoiding the storage platform 6 from tilting, and improving the lifting safety of the ceiling storage rack.

[0050] ​In some embodiments, in order to facilitate installation of the limiting device, the limiting device is arranged at the end of the winding shaft 5 away from the driving structure 8. That is, the limiting device and the driving structure 8 are arranged at two ends of the winding shaft 5 respectively.

[0051] In the description of the embodiments of the present application, it should be noted that, in the description of the present application, the terms indicating the direction or position relationship such as "inner", "outer" and the like are based on the direction or position relationship shown in the drawings, which is merely for the convenience of description, and does not indicate or imply that the device or member must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0052] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "in this embodiment", "specific example" or "some examples" and the like means that the specific features, mechanisms, materials or characteristics described in conjunction with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, mechanisms, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. Furthermore, different embodiments or examples described in the specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0053] The above is merely a specific implementation of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A limiting device, characterized in that: include A limiting shaft connected to the ceiling rack winding shaft and rotating synchronously with the winding shaft, the limiting shaft having an external thread, and a sliding member being threadedly connected to the limiting shaft; The limiting component includes a first limiting member and a second limiting member. The first limiting member is used to limit the circumferential rotation of the sliding member, and to make the sliding member move axially along the limiting shaft when the winding shaft drives the limiting shaft to rotate; the second limiting member is used to abut against the sliding member when the winding shaft rotates until the cable is completely released to limit the movement of the sliding member and stop the rotation of the limiting shaft.

2. The limiting device according to claim 1, characterized in that: The first limiting member is provided with a guide groove, and the sliding member is provided with an inserting portion inserted into the guide groove. When the sliding member moves along the axial direction of the limiting shaft, the inserting portion abuts against the side wall of the guide groove.

3. The limiting device according to claim 2, characterized in that: The first limiting member is configured as a hollow limiting box, the limiting shaft and the sliding member are both disposed in the limiting box, and the limiting box is provided with the guide groove along a length direction.

4. The limiting device according to claim 3, characterized in that: The guide grooves are respectively provided on the top wall and the bottom wall of the limit box, and the upper end and the lower end of the sliding member are respectively provided with insertion portions inserted into the guide grooves on the top wall and the bottom wall of the limit box.

5. The limiting device according to claim 3, characterized in that: An end cover is provided at the end of the limiting box, and the end cover forms the second limiting member.

6. The limiting device according to claim 1, characterized in that: The limiting shaft is coaxially arranged with the winding shaft, and the limiting shaft is connected to one end of the winding shaft via a fastener; or one end of the winding shaft extends outwardly in the axial direction to form the limiting shaft.

7. The limiting device according to claim 5, characterized in that: The end cover is provided with an axis hole for the free end of the limiting shaft to extend outward, and the axis hole forms a rotation support for the limiting shaft.

8. A ceiling rack comprising a bracket, a storage platform, a winding shaft rotatably connected to the bracket, and a drive structure for rotating the winding shaft, wherein the winding shaft is provided with a winding portion on which a cable connected to the storage platform is wound; characterized in that: The ceiling storage rack further comprises the limiting device according to any one of claims 1 to 7.

9. The ceiling rack according to claim 8, characterized in that: The limiting device is arranged at one end of the winding shaft away from the driving structure.

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