Lifting trundle capable of adjusting height

Abstract

The utility model provides a lifting caster capable of adjusting height, which relates to the technical field of lifting casters and comprises a caster main body, a butt joint block is arranged at the top end of the caster main body, and a connecting column which moves up and down in the butt joint block to play a lifting role is arranged at the top end of the caster main body. A first bevel gear which is arranged on the outer wall of the connecting column in a sleeving mode and plays an adjusting role is arranged in the butt-joint block, a user rotates a rotating disc to drive a rotating shaft to drive a second bevel gear to rotate under the limitation of the butt-joint block, and the first bevel gear connected in an engaged mode is caused to rotate under the limitation of the butt-joint block; when the caster is subjected to gravity, the rotating disc provides elastic force through the telescopic rod to abut against the clamping disc, sawteeth of the clamping disc are clamped into tooth-shaped grooves of the locking disc, the purpose of limiting reverse rotation of the rotating shaft is achieved, and the purpose of locking the caster body and the connecting column is achieved.

Description

Technical Field

[0001] This utility model relates to the field of height-adjustable casters, and in particular to a height-adjustable caster. Background Technology

[0002] A caster is a wheel assembly installed on the bottom of equipment or furniture to facilitate its movement. It typically consists of wheels, axles, and supports. The main function of casters is to facilitate the movement of objects, reduce friction during movement, and improve handling efficiency. Adjustable casters are a type of caster with height adjustment capabilities.

[0003] However, existing height-adjustable casters rely on users turning a screw to adjust the height. Due to the load, the weight of the caster itself can cause the screw to loosen during use, resulting in the caster not being fixed in place and retracting. There is a lack of devices that can lock the caster height without hindering the use of the casters. Therefore, a height-adjustable caster is needed. Utility Model Content

[0004] The purpose of this invention is to provide a height-adjustable lifting caster that solves the problems of slow adjustment requiring tools and caster loosening in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a height-adjustable lifting caster, comprising a caster body, a docking block at the top of the caster body, a connecting column inside the docking block for lifting and lowering, a first bevel gear sleeved on the outer wall of the connecting column for adjustment, a rotating shaft penetrating the outer wall of the docking block, a second bevel gear cooperating with the first bevel gear at one end of the outer wall of the rotating shaft, a locking disc for locking, and a locking disc cooperating with the locking disc for adjusting the locking state on the outer wall of the rotating shaft.

[0006] Preferably, the other end of the rotating shaft is connected to a turntable, and the turntable is connected to the locking disc via a telescopic rod.

[0007] Preferably, the locking disc has a sliding groove that matches the rotating shaft.

[0008] Preferably, the locking disc has a toothed groove on the side near the engaging disc, and the engaging disc has serrations on one side that engage with the toothed groove of the locking disc.

[0009] Preferably, the second bevel gear meshes with the first bevel gear via a rotating shaft.

[0010] Preferably, the outer wall of the connecting column is provided with threaded ribs, and the first bevel gear is provided with a threaded groove that matches the connecting column.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] The user rotates the turntable to drive the rotating shaft, which in turn drives the second bevel gear to rotate under the constraint of the mating block. This causes the first bevel gear, which is in mesh with the first bevel gear, to rotate under the constraint of the mating block. This causes the connecting column, which is helically connected inside the first bevel gear, to move the caster body, thus achieving the purpose of lifting and lowering. When subjected to gravity, the turntable provides elastic force through the telescopic rod to hold the locking plate in place, so that the serrations of the locking plate engage with the toothed grooves of the locking plate, thereby preventing the rotating shaft from reversing and locking the caster body and the connecting column. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the product of this utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the docking block of the present invention;

[0015] Figure 3 This is a schematic cross-sectional view of the overall structure of the product of this utility model;

[0016] Figure 4 This is a schematic diagram of the locking structure of the product of this utility model;

[0017] Figure 5 This is a schematic diagram of the second bevel gear structure of the present invention;

[0018] Figure 6 This is a schematic diagram of the card-closing disc structure of the product of this utility model;

[0019] Figure 7 This is a cross-sectional structural diagram of the telescopic rod of the present invention.

[0020] In the diagram: 1. Caster body; 2. Connecting column; 3. First bevel gear; 4. Connecting block; 5. Second bevel gear; 6. Rotating shaft; 7. Turntable; 8. Locking disc; 9. Telescopic rod; 901. Telescopic barrel; 902. Telescopic shaft; 903. Spring; 10. Locking disc. Detailed Implementation

[0021] 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.

[0022] This utility model relates to a height-adjustable lifting caster, such as... Figure 1-7 As shown, the system includes a caster body 1, with a connecting column 2 fixedly connected to the top of the caster body 1 to support the lifting and lowering of the caster body 1. A first bevel gear 3 is sleeved on the outer wall of the connecting column 2, and a second bevel gear 5 is meshed with the outer wall of the first bevel gear 3. The side wall of the second bevel gear 5 is fixedly connected to one end of a rotating shaft 6. The rotating shaft 6 passes through a docking block 4 and is connected to the second bevel gear 5. The top of the first bevel gear 3 is rotatably connected to the docking block 4. Rotating the rotating shaft 6 causes the second bevel gear 5 to drive the meshed first bevel gear 3 to rotate, thereby enabling the connecting column 2 to drive the caster body 1 to move up and down, achieving the purpose of lifting and lowering.

[0023] Among them, such as Figure 3 As shown, the outer wall of the connecting column 2 is provided with threaded ribs, the first bevel gear 3 has a threaded groove that matches the connecting column 2, and the mating block 4 has a groove that matches the connecting column 2, the first bevel gear 3 and the second bevel gear 5. The first bevel gear 3 plays a supporting role inside the mating block 4, supporting the caster body 1 and the connecting column 2 to rise and fall. The second bevel gear 5 forms a meshing structure with the first bevel gear 3 through the rotating shaft 6. The first bevel gear 3 forms a spiral structure with the connecting column 2 through the second bevel gear 5, so as to realize the purpose of adjusting the height of the caster body 1.

[0024] Furthermore, to prevent the caster body 1 from locking in position, one end of the rotating shaft 6 is fixedly connected to the side wall of the turntable 7, so that the turntable 7 can be manually rotated to achieve lifting and lowering. A telescopic rod 9 is also fixedly connected to the side of the turntable 7 connected to the rotating shaft 6. The turntable 7 is connected to the locking plate 10 through the telescopic rod 9. The outer wall of the docking block 4 is also provided with a locking plate 8 that works with the locking plate 10. The elasticity of the telescopic rod 9 causes the locking plate 10 to abut against one side of the locking plate 8, preventing the caster body 1 and the connecting column 2 from being compressed and shrinking.

[0025] Among them, such as Figure 4-7As shown, the locking disc 8 and the telescopic rod 9 are provided with sliding grooves that match the rotating shaft 6. The telescopic rod 9 includes a telescopic barrel 901, a telescopic shaft 902, and a spring 903. The telescopic barrel 901 has a sliding groove that matches the telescopic shaft 902. The inside of the telescopic barrel 901 is provided with a spring 903 that is fixedly connected to one end of the telescopic shaft 902. The other end of the spring 903 is connected to the inner wall end face of the telescopic barrel 901. The telescopic barrel 901 and the telescopic shaft 902 are elastically connected through the spring 903. The locking disc 8 has a toothed groove on the side that fits against the locking disc 10. The side wall of the locking disc 10 has serrations that engage with the toothed groove of the locking disc 8, so that the locking disc 10 is engaged in the toothed groove of the telescopic rod 9, thereby preventing reverse locking and ensuring that the position of the caster body 1 and the connecting column 2 is fixed.

[0026] In practical use: by the user rotating the turntable 7 to drive the rotating shaft 6, the second bevel gear 5 rotates under the restriction of the docking block 4, causing the meshing first bevel gear 3 to rotate under the restriction of the docking block 4, so that the connecting column 2, which is spirally connected inside the first bevel gear 3, drives the caster body 1 to move, thereby achieving the purpose of lifting. When subjected to gravity, the turntable 7 provides elastic force through the telescopic rod 9 to hold the locking disc 10, so that the serrations of the locking disc 10 are engaged in the toothed groove of the locking disc 8, thereby restricting the rotation of the rotating shaft 6 to reverse, and achieving the purpose of locking the caster body 1 and the connecting column 2.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A height-adjustable lifting caster, comprising a caster body (1), characterized in that: The top of the caster body (1) is provided with a docking block (4), and the top of the caster body (1) is provided with a connecting column (2) that moves up and down inside the docking block (4) to perform lifting and lowering functions. The inside of the docking block (4) is provided with a first bevel gear (3) that is sleeved on the outer wall of the connecting column (2) to perform adjustment functions. The outer wall of the docking block (4) is penetrated by a rotating shaft (6). One end of the outer wall of the rotating shaft (6) is provided with a second bevel gear (5) that cooperates with the first bevel gear (3). The outer wall of the docking block (4) is provided with a locking disc (8) that performs locking functions. The outer wall of the rotating shaft (6) is sleeved with a locking disc (10) that cooperates with the locking disc (8) to adjust the locking state.

2. The height-adjustable lifting caster according to claim 1, characterized in that: The other end of the rotating shaft (6) is connected to a turntable (7), which is connected to the locking disc (10) via a telescopic rod (9).

3. The height-adjustable lifting caster according to claim 2, characterized in that: The locking disc (10) has a sliding groove that matches the rotating shaft (6).

4. The height-adjustable lifting caster according to claim 1, characterized in that: The locking disc (8) has a toothed groove on one side near the engaging disc (10), and the engaging disc (10) has serrations on one side that engage with the toothed groove of the locking disc (8).

5. The height-adjustable lifting caster according to claim 1, characterized in that: The second bevel gear (5) meshes with the first bevel gear (3) via a rotating shaft (6).

6. The height-adjustable lifting caster according to claim 1, characterized in that: The outer wall of the connecting column (2) is provided with threaded ribs, and the first bevel gear (3) is provided with a threaded groove that matches the connecting column (2).

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