CN214742732U - Self-positioning rotary connecting structure - Google Patents

Abstract

The utility model discloses a from location rotation connection structure, including first connecting portion and second connecting portion, the fixed axle sleeve that is provided with on the first connecting portion, the fixed pivot that is provided with on the second connecting portion, this pivot is worn to establish in the axle sleeve, the axle sleeve includes at least one elastic ring, elastic ring with first connecting portion fixed connection, elastic ring enclasping is in the pivot. Compared with the prior art, the beneficial effects of the utility model are that: need not to set up locking structure, when the frictional force between force overcoming axle sleeve and the pivot of exerting, can make arbitrary angle relative rotation and automatic positioning between first connecting portion and the second connecting portion, simple structure adjusts the convenience.

Description

Self-positioning rotary connecting structure

Technical Field

The utility model belongs to the technical field of machinery rotates to connect, concretely relates to self-align rotates connection structure.

Background

A rotational connection is a common connection. In some products, the relative rotational adjustment and positioning between the two components is achieved by a combination of a rotational connection and a locking mechanism. For example, the seat back and the seat frame are rotatably connected through the angle adjuster, and the adjuster can be self-locked. When the backrest is adjusted to a certain angle, the backrest is locked with the seat frame, and the angle is kept. In order to realize the rotation adjusting function and bear larger torsion, the angle adjuster module is more complex. In some scenarios, the use of a rotating connection and locking mechanism is overly complex and takes up more installation space, affecting the design and installation of other components. In addition, in the case of a rotation joint with little stress, the locking mechanism is not necessary, which leads to an increase in cost. For example, to improve user comfort, seat headrests are often designed to be angularly adjustable by rotation in a vertical plane. However, such angle adjustment structures in the prior art are complicated.

SUMMERY OF THE UTILITY MODEL

In view of the above, as part of the solution to the above problems, the present invention provides a self-positioning rotating connection structure.

The technical scheme is as follows:

the utility model provides a from location rotation connection structure, includes first connecting portion and second connecting portion, the fixed axle sleeve that is provided with on the first connecting portion, the fixed pivot that is provided with on the second connecting portion, this pivot is worn to establish in the axle sleeve, its key lies in, the axle sleeve includes at least one elastic ring, the elastic ring with first connecting portion fixed connection, the elastic ring hugs closely in the pivot.

Compared with the prior art, the beneficial effects of the utility model are that: need not to set up locking structure, when the frictional force between force overcoming axle sleeve and the pivot of exerting, can make arbitrary angle relative rotation and automatic positioning between first connecting portion and the second connecting portion, simple structure adjusts the convenience.

Drawings

FIG. 1 is a front view of the first embodiment;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a left side view of FIG. 1;

fig. 5 is a cross-sectional view taken along line B-B in fig. 4.

Detailed Description

The present invention will be further described with reference to the following examples and accompanying drawings.

Example one

The utility model provides a from location rotation connection structure, includes first connecting portion and second connecting portion, the shaping has axle sleeve 120 on the first connecting portion, be equipped with pivot 210 on the second connecting portion, this pivot 210 wears to establish in the axle sleeve 120. As shown in fig. 1, 3 and 4, the shaft sleeve 120 includes at least one elastic ring 121, the elastic ring 121 is fixedly connected to the first connecting portion, and the elastic ring 121 is tightly held on the rotating shaft 210. When the force applied to the first connection portion causes the shaft sleeve 120 to receive a torque force greater than a friction force between the shaft sleeve 120 and the rotation shaft 210, the shaft sleeve 120 rotates around the rotation shaft 210 to adjust an angle between the first connection portion and the second connection portion; when the force applied to the first connection portion is removed or is less than the friction force between the shaft sleeve 120 and the rotating shaft 210, the shaft sleeve 120 and the rotating shaft 210 are in a relatively static state, i.e., a locked state, and the first connection portion and the second connection portion are relatively fixed.

In order to improve the connection stability and the bearing capacity, there are at least two elastic rings 121, all the elastic rings 121 are disposed on the same center line and are arranged in parallel along the length direction of the rotating shaft 210, and two adjacent elastic rings 121 are attached to each other to form the shaft sleeve 120.

In this embodiment, the elastic ring 121 is formed by bending a section of steel wire, and two ends of the steel wire are close to each other, so as to embrace the rotating shaft 210. To improve reliability, the two ends of the steel wire are abutted together and partially overlapped to form the elastic ring 121, and the steel wire is wound on the rotating shaft 210 in a spiral manner. The number of winding turns of the steel wire section of the elastic ring 121 is larger than one and smaller than two turns, so that the rotating shaft 210 can be tightly held, elastic deformation can be generated during stress to facilitate rotation, radial or circumferential deformation redundancy is provided, two ends of the elastic ring 121 are prevented from being separated from the rotating shaft 210 in the direction perpendicular to the rotating shaft 210, and safety factor is improved. In the length direction of the rotating shaft 210, two adjacent steel wire segments in the same elastic ring 121 are abutted, so that the density of the elastic ring 121 is increased, and the integrity of the elastic ring is improved.

In this embodiment, the first connection portion includes a hinge block 110. The second connection portion is not shown in the figure. Any end of the elastic ring 121 extends towards the hinge block 110 to form an extension section 122, the extension section 122 is arranged along the radial direction of the rotating shaft 210, the extension sections 122 connected with the same shaft sleeve 120 are arranged in parallel along the length direction of the rotating shaft 210, a bending section 123 is formed on the extension section 122, and the bending section 123 is attached and fixed on the hinge block 110 or embedded in the hinge block 110, so that the elastic ring 121 is connected into a whole, and the connection strength and stability of the steel wire and the first connection part are improved.

Preferably, the bending section 123 is located in the same plane as the axis of the rotating shaft 210, so that when a pushing force is applied to the first connecting portion to rotate around the rotating shaft 210, the torque transmitted from the bending section to the elastic ring 121 is large.

In this embodiment, the hinge block 110 is made of a polymer material. As shown in fig. 2 and 5, the bending section 123 is embedded in the hinge block 110. The bending sections 123 are 7-shaped, and all the bending sections 123 are arranged in parallel along a direction parallel to the axial lead of the rotating shaft 210. All the bending sections 123 are arranged in parallel in the mold and are formed into the hinge block 110 through injection molding.

In this embodiment, a pair of opposite end surfaces of the hinge block 110 are respectively connected with a shaft sleeve 120, which is a first shaft sleeve and a second shaft sleeve; each shaft sleeve 120 is internally provided with a rotating shaft in a penetrating manner, and the two rotating shafts are respectively a first rotating shaft and a second rotating shaft, so that a double-hinge connecting structure with two independent rotating points and independent positioning is formed.

One use scenario of the connection structure of embodiment one is as described in embodiment two.

Example two

A seat headrest adjusting structure comprises a seat back and a headrest module, wherein the seat back top and the headrest module are connected through a double-hinge connecting structure in the first embodiment to support the headrest module. The first rotating shaft as described in the first embodiment is fixedly arranged on the seat back, the second rotating shaft as described in the first embodiment is fixedly arranged on the back side of the headrest module, the first shaft sleeve connected with the hinge block 110 is sleeved on the first rotating shaft, and the second shaft sleeve is sleeved on the second rotating shaft. This structure can realize the rotational adjustment and positioning of the headrest module with respect to the seatback, as well as the rotational adjustment and positioning of the headrest module itself.

Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and the scope of the present invention.

Claims (9)

1. The utility model provides a from location rotation connection structure, includes first connecting portion and second connecting portion, fixed axle sleeve (120) of being provided with on the first connecting portion, fixed pivot (210) of being provided with on the second connecting portion, this pivot (210) are worn to establish in axle sleeve (120), its characterized in that: the shaft sleeve (120) comprises at least one elastic ring (121), the elastic ring (121) is fixedly connected with the first connecting portion, and the elastic ring (121) is tightly held on the rotating shaft (210).

2. The self-positioning rotary joint structure according to claim 1, wherein: at least two elastic rings (121) are arranged, all the elastic rings (121) are arranged on the same central line and are arranged in parallel along the length direction of the rotating shaft (210), and two adjacent elastic rings (121) are attached to each other to form the shaft sleeve (120).

3. The self-positioning rotary joint structure according to claim 2, wherein: the elastic ring (121) is formed by bending a section of steel wire in the circumferential direction, and two ends of the steel wire are close to each other.

4. The self-positioning rotary joint structure according to claim 3, wherein: the two ends of the steel wire are abutted together and partially overlapped to form the elastic ring (121).

5. The self-positioning rotary joint structure according to claim 3 or 4, wherein: the first connection portion includes a hinge block (110);

any end of the elastic ring (121) extends towards the hinge block (110) to form an extension section (122), the extension section (122) is radially arranged along the rotating shaft (210), the extension section (122) connected with the same shaft sleeve (120) is arranged in parallel along the length direction of the rotating shaft (210), a bending section (123) is formed on the extension section (122), and the bending section (123) is attached and fixed to the hinge block (110) or embedded in the hinge block (110).

6. The self-positioning rotary joint structure according to claim 5, wherein: the hinge block (110) is made of high polymer materials, and the bending section (123) is embedded in the hinge block (110).

7. The self-positioning rotary joint structure according to claim 6, wherein: the bending section (123) and the shaft axis of the rotating shaft (210) are positioned in the same plane.

8. The self-positioning rotary joint structure according to claim 6, wherein: the bending sections (123) are 7-shaped, and all the bending sections (123) are arranged in parallel along the direction parallel to the axial lead of the rotating shaft (210).

9. The self-positioning rotary joint structure according to claim 8, wherein: all the bending sections (123) are arranged in parallel in a mold, and the hinge block (110) is formed through injection molding.

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