A bed wheel hub rod with reset function

Abstract

This utility model discloses a bed wheel pivot rod with a reset function, comprising an outer pivot tube and an inner pivot tube. The inner pivot tube has a guide hole, and a guide post is slidably connected within the guide hole. One end of the guide post has a connecting part, and the other end has a driven pressing part. A central post is connected in series between the driven pressing part and the guide post, and an elastic element is sleeved on the central post. An active pressing part is provided inside the outer pivot tube, and a limiting tube is provided inside the outer pivot tube. Guide grooves are distributed around the inner wall of the limiting tube, and a locking groove is provided between two adjacent guide grooves. The driven pressing part is rotatably connected inside the limiting tube. A first limiting block is provided on the side of the driven pressing part, matching the guide grooves one by one. One end of the first limiting block has a third guide slope. A second limiting block is provided on the active pressing part, slidably connected within the guide groove. A drive assembly is provided on the outer pivot tube. This pivot rod has the characteristics of being resettable, having high safety, complete overall function, and strong practicality.

Description

Technical Field

[0001] This utility model relates to the field of mechanical technology, and more specifically, it relates to a central rod of a hospital bed wheel with a reset function. Background Technology

[0002] Some hospital bed wheels have a central pivot rod with an axially movable drive rod. The lower end of the drive rod brakes the wheel, while the upper end is controlled by a rotating cam to move the drive rod axially. This structure typically has a pedal connected to the cam to control its rotation. However, when the pedal is forced to return to its original position, the drive rod also returns to its original position due to the action of its built-in elastic element, thus causing the hospital bed wheel to lose its braking function, resulting in poor overall performance. Therefore, this invention proposes a hospital bed wheel pivot rod with a return-to-position function. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a bed wheel pivot rod with a reset function. This pivot rod is characterized by resettlement and high safety.

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is achieved as follows: The utility model relates to a bed wheel pivot rod with a resetting function, comprising a central outer tube and a central inner tube arranged coaxially. The central inner tube has a non-rotating cylindrical guide hole in its center. A matching guide post is slidably connected within the guide hole. One end of the guide post has a connecting part, and the other end has a driven pressing part. A central post is connected in series between the driven pressing part and the guide post. An elastic element is fitted on the central post, with one end abutting against the driven pressing part and the other end abutting against the central inner tube. The central outer tube has an axially sliding active pressing part that abuts against the driven pressing part. The central outer... The tube is equipped with a limiting tube, and the inner wall of the limiting tube is provided with several guide grooves extending axially. Both ends of the guide grooves are connected to the outside. A locking groove is provided on the end face of the limiting tube between two adjacent guide grooves. The locking groove has a first guide slope between it and an adjacent guide groove, and a second guide slope between it and another adjacent guide groove. The driven pressing part is rotatably connected in the limiting tube. The side of the driven pressing part is provided with a first limiting block that matches the guide groove one by one. One end of the first limiting block has a third guide slope. The active pressing part is provided with a second limiting block that is slidably connected in the guide groove. The central outer tube is provided with a drive assembly for manipulating the active pressing part to move axially.

[0005] The present invention is further configured such that: the driving component includes a cam rotatably connected inside the central outer tube, the wheel surface of the cam abuts against the active pressing part, the rotation axis of the cam is perpendicular to the axis of the central outer tube, the cam is provided with a non-rotating cylindrical turning hole, and the central outer tube is provided with a clearance hole for the turning hole to be exposed.

[0006] The present invention is further configured such that the elastic element is a compression spring.

[0007] In summary, this utility model has the following beneficial effects: The central rod of the bed wheel with reset function involved in this utility model, when the central rod completes a single cam rotation, the driven pressing part will not be reset because the second limiting block is stuck in the locking groove, so that the connected bed wheel does not lose its braking function. Only by rotating the cam again can the second limiting block be disengaged from the locking groove, thereby releasing the brake on the bed wheel. It can be reset, has high safety, complete overall function, and strong practicality. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0009] Figure 2 This is a partial structural schematic diagram of the present invention;

[0010] Figure 3 This is a partial structural schematic diagram of the present invention;

[0011] Figure 4 This is a schematic diagram illustrating the structure of the central internal tube of this utility model;

[0012] Figure 5 This is a schematic diagram illustrating the structure of the limiting tube in this utility model. Detailed Implementation

[0013] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. However, it should be understood that these descriptions are only for further illustrating the features and advantages of this utility model, and not for limiting the patent claims of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

[0014] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0015] Example 1

[0016] See Figures 1 to 5As shown, the central rod of a hospital bed wheel with a repositioning function involved in this embodiment includes a central outer tube 1 and a central inner tube 2 arranged coaxially. The central inner tube 2 has a non-rotating cylindrical guide hole 3 in the center. A guide post 4 is slidably connected to the guide hole 3. One end of the guide post 4 is provided with a connecting part 5, and the other end is provided with a driven pressing part 6. A central post 7 is connected in series between the driven pressing part 6 and the guide post 4. An elastic element 8, which is a compression spring, is sleeved on the central post 7, with one end abutting against the driven pressing part and the other end abutting against the central inner tube. The central outer tube 1 is provided with an active pressing part 9 that slides axially and abuts against the driven pressing part 6. The central outer tube 1 is provided with a limiting tube 10. The inner wall of the limiting tube 10 is provided with a plurality of axially extending guide grooves 11. Both ends of the guide grooves 11 are connected to the outside. A joint is provided on the end face of the limiting tube between two adjacent guide grooves 11. The locking groove 12 on the upper part has a first guide slope 13 between the locking groove 12 and an adjacent guide groove 11, and a second guide slope 14 between the locking groove 12 and another adjacent guide groove 11. The driven pressing part 6 is rotatably connected in the limiting tube 10. The side of the driven pressing part 6 is provided with a first limiting block 140 that matches the guide groove one by one. One end of the first limiting block 140 has a third guide slope (not marked). The active pressing part 9 is provided with a second limiting block 15 that is slidably connected in the guide groove. The central outer tube 1 is provided with a drive assembly for manipulating the active pressing part to move axially. The drive assembly includes a cam 16 that is rotatably connected in the central outer tube 1. The wheel surface of the cam 16 abuts against the active pressing part. The rotation axis of the cam 16 is perpendicular to the axis of the central outer tube 1. The cam 16 is provided with a non-rotating columnar turning hole 17. The central outer tube 1 is provided with a clearance hole (not shown) for the turning hole to be exposed.

[0017] In this embodiment, by rotating the cam 16 once, it pushes the active pressing part 9 downward. Through linkage, the driven pressing part 6, carrying the central column 7 and connected components, moves downward. The elastic element 8 is compressed. During the downward movement of the driven pressing part 6, the first limiting block 140 disengages from the guide groove 11 and slides into the locking groove 12 along the second guide slope 14, thus preventing the downward-moving central column 7 from resetting. At this time, releasing the cam 16 will not achieve automatic reset of the central column 7. If it is necessary to move the central column 7 and connected components upward to reset, the cam 16 needs to be rotated again to push the active pressing part 9 downward. Through linkage, the driven pressing part 6, carrying the central column 7 and connected components, moves slightly downward. The first limiting block 140 disengages from the locking groove 12 and slides into the guide groove 11 along the first guide slope 13. With the elastic element 8 resetting automatically, the central column 7 and connected components can achieve automatic reset.

[0018] The bed wheel pivot rod with reset function involved in this utility model has the following characteristics: when the pivot rod completes a single cam rotation, the driven pressing part cannot be reset because the second limit block is stuck in the locking groove, so that the connected bed wheel does not lose its braking function. Only by rotating the cam again can the second limit block be disengaged from the locking groove, thereby releasing the brake on the bed wheel. It can be reset, has high safety, complete overall function, and strong practicality.

[0019] Unless otherwise specified, in this utility model, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the actual orientation or positional relationship shown. 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, the terms used to describe orientation or positional relationships in this utility model are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the embodiments and according to the specific circumstances.

[0020] Unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A central pivot rod for a hospital bed wheel with a repositioning function, comprising an outer central tube and an inner central tube arranged coaxially, characterized in that: The central inner tube has a non-rotating cylindrical guide hole at its center. A matching guide post is slidably connected within the guide hole. One end of the guide post has a connecting part, and the other end has a driven pressing part. A central post is connected in series between the driven pressing part and the guide post. An elastic element is fitted on the central post, with one end abutting against the driven pressing part and the other end abutting against the central inner tube. The central outer tube has an axially sliding active pressing part that abuts against the driven pressing part. The central outer tube also has a limiting tube, and the inner wall of the limiting tube is circumferentially distributed with several axially extending guide grooves. Both ends are connected to the outside. A locking groove is provided on the end face of the limiting tube between two adjacent guide grooves. The locking groove has a first guide slope between it and an adjacent guide groove and a second guide slope between it and another adjacent guide groove. The driven pressing part is rotatably connected in the limiting tube. The side of the driven pressing part is provided with a first limiting block that matches the guide groove one by one. One end of the first limiting block has a third guide slope. The active pressing part is provided with a second limiting block that is slidably connected in the guide groove. The central outer tube is provided with a drive assembly for manipulating the active pressing part to move axially.

2. The bed wheel pivot rod with reset function according to claim 1, characterized in that: The drive assembly includes a cam rotatably connected inside the central outer tube. The wheel surface of the cam abuts against the active pressing part. The rotation axis of the cam is perpendicular to the axis of the central outer tube. The cam has a non-rotating cylindrical turning hole. The central outer tube has a clearance hole for the turning hole to be exposed.

3. The bed wheel pivot rod with reset function according to claim 1 or 2, characterized in that: The elastic element is a compression spring.

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