CN201416597Y - Muff-coupling type rotating shaft - Google Patents

Abstract

The utility model relates to a cup joint formula pivot, it includes: a shaft barrel part, which is provided with a shaft hole in the axial direction of the barrel body, and the inner wall of the opening at the front end of the shaft hole is provided with at least one positioning groove in the axial direction; the sleeve is sleeved in the shaft hole and is a multi-fold elastic ring body, the ring body is formed by alternately surrounding a bending part and an adjacent contact surface, an axial cutting groove is formed at a proper position, and at least one clamping tenon is arranged at the front end of the sleeve in a radial protruding mode and inserted into the positioning groove to form a clamping buckle; and a pivot piece, a shaft lever extends axially, the shaft lever is sleeved on the sleeve, so that each bending part of the sleeve is abutted against the inner wall of the shaft hole due to the radial pressure of the shaft lever, and each contact surface of the sleeve forms friction torsion with the shaft lever. By the implementation of the utility model, the disadvantage that the sleeve slips on the inner wall of the shaft hole due to the overlarge friction force between the shaft lever and the sleeve is avoided; and a stable torque value can be provided between the shaft rod and the sleeve.

Description

Socket shaft

technical field

The utility model relates to a rotating shaft, especially a socketed rotating shaft. There is a positioning mechanism between the shaft tube part of the rotating shaft and the sleeve sleeved inside, so that the sleeve will not follow the rotation of the pivot part. , while slipping on the inner wall of the shaft cylinder.

Background technique

Consumer electronic products with a flip cover, such as portable computers, electronic dictionaries, portable audio-visual playback devices, and flip-top mobile phones... etc., basically, the main body is placed in the lower half, and the shaft and the upper half The cover body is connected so that the cover body can be opened and closed relative to the main body. Therefore, the rotating shaft is also a major factor in determining the quality of the above-mentioned products.

Basically, in order to obtain the expected stagnation positioning effect, the traditional socket-type shaft requires very high precision. It mainly forms a shaft hole in the axial direction on a female connector, and a through-cut hole is formed in the shaft column of the male connector horizontally. The groove is used to provide the proper elasticity of the shaft so that it can be inserted into the shaft hole so that the friction torque is between the shaft and the shaft hole. Due to the existence of the slot, the friction parts of the shaft in the shaft hole are vertically located on both sides of the slot. When repeated operations, the two friction parts are worn out very quickly, resulting in slack.

Based on the shortcomings of the front-opening sleeve type shaft, as shown in Figure 1, the relevant industry has set an elastic multi-fold sleeve 20 in the female connector 10, and the shaft 301 of the male connector 30 is sleeved into the sleeve 20, so that the frictional torque occurs on the multi-fold contact surface between the shaft column 301 and the sleeve 20. However, the obvious disadvantage of this socket-type rotating shaft is that if there is insufficient lubricating oil between the shaft column 301 and the sleeve 20, it will cause dryness; or when the female connector is combined with the sleeve, the tightness will be insufficient due to excessive tolerance; When the shaft 301 of the male connector 30 rotates in the sleeve 20, due to the excessive friction force, the sleeve 20 is forced to slip on the inner wall of the female connector 10, resulting in serious defects such as variation in torque value or excessive decay , and there is room for improvement.

Utility model content

The main purpose of the utility model is to provide a socket-type rotating shaft, which is provided with a positioning mechanism between the shaft tube and the sleeve, so that the sleeve is firmly positioned inside the shaft tube, and has the function of preventing the pivot and the sleeve from In addition to the disadvantage of slippage between the sleeve and the inner wall of the shaft cylinder due to the excessive friction force of the sleeve, a stable torsion value between the sleeve and the pivot member can be provided.

In order to achieve the above-mentioned purpose, the technical means adopted by the utility model is to provide a socket-type rotating shaft, which includes:

A shaft member, which has a connecting portion, and a shaft hole is opened in the axial direction of the cylinder body, and at least one positioning groove is axially opened on the inner wall of the front opening of the shaft hole;

A sleeve is sleeved in the shaft hole, which is a multi-fold elastic ring body, which is formed by interlacing the bending part and the adjacent contact surface, and forms a shaft at an appropriate position. To the slot, at least one tenon protrudes radially from the front end of the sleeve, which is inserted into the positioning groove to form a buckle; and

A pivot member, which has a connecting portion, and a shaft extending axially, the shaft is sleeved on the sleeve, so that the bending parts of the sleeve are pressed against the inner wall of the shaft hole due to the radial pressure of the shaft , and each contact surface of the sleeve forms a friction torque with the shaft.

The beneficial effects of the utility model are:

The sleeve type rotating shaft of the utility model is provided with a positioning mechanism between the shaft tube part and the sleeve, so that the sleeve is firmly positioned inside the shaft tube part, and has the function of preventing the pivot part and the sleeve due to excessive friction. In addition to the disadvantage of slipping between the sleeve and the inner wall of the shaft member, it can also provide a stable torque value between the sleeve and the pivot member.

Description of drawings

In order to further disclose the specific technical content of the present utility model, the following detailed description is as follows in conjunction with the embodiments and accompanying drawings, wherein:

Fig. 1 is a three-dimensional exploded view of a known socket-type rotating shaft;

Fig. 2 is a three-dimensional exploded view of the socket-type rotating shaft of the present invention;

Fig. 3 is the perspective view after the utility model is assembled;

Fig. 4 is the front view after the utility model is assembled;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4 .

Detailed ways

As shown in FIGS. 2 to 5 , basically, the sleeve-type rotating shaft of the present invention is composed of a shaft member 1 , a sleeve 2 , and a pivot member 3 .

Wherein, one end of the shaft member 1 has a connecting portion 11, which is the main body of the combined electronic product. As shown in FIG. , and locked to the main body. But not limited thereto, the connecting part 11 can be a cylinder with a non-circular cross-section, so that it can be inserted and positioned in the predetermined hole of the main body, and the same connection effect can also be obtained. The other side of the connecting portion 11 extends a cylindrical body 12 , which defines an axial hole 121 with a size slightly smaller than that of the sleeve 2 in the axial direction. The creative feature of the barrel 12 is that at least one positioning groove 122 is axially defined in the inner wall of the front opening of the shaft hole 121 . As shown in FIG. 2 , in order to facilitate the assembly of the sleeve 2 , a pair of positioning slots 122 are defined on the inner wall of the front opening of the shaft hole 121 relative to the axial direction.

The sleeve 2 is a multi-fold elastic ring, which is composed of a bent part 21 and an adjacent contact surface 22. An axial slit 23 is formed on a bent part 21, so that the sleeve 2 has the elasticity of radial expansion. As shown in Figure 2 and Figure 5, the sleeve 2 is pentagonal, but not limited thereto. The creative feature of the sleeve 2 is that the front end of the sleeve 2, especially at least one contact surface 22 radially protrudes at least one tenon 24, and the tenon 24 is formed by bending the sleeve 2 into a multi-fold shape. Afterwards, the elastic ring is bent so that it radially protrudes from the front end of the contact surface 22 . Therefore, when the sleeve 2 is sleeved in the shaft hole 121, the at least one tenon 24 is inserted into the selected positioning groove 122 to produce a positioning effect, and each bending portion 21 of the sleeve 2 is then It abuts against the inner wall of the shaft hole 121 of the shaft cylinder 1 , so that the sleeve 2 can be firmly positioned in the shaft cylinder 1 .

As shown in Fig. 4 and Fig. 5, a positioning groove 122 of the shaft hole 121 is engaged by a tenon 24 protruding radially from the front end of a contact surface 22 of the sleeve 2, while the other positioning groove 122 is adjacent to the sleeve. Slot 23 of barrel 2.

The pivot member 3 is a rod, and the connecting portion 31 at one end is combined with the cover of the electronic product. As shown in FIG. cover body. However, it is not limited thereto, the connecting portion 31 may also be provided with at least one engaging hole, so as to utilize known combining components, such as screws passing through, to be locked on the cover body.

A shaft 32 extends axially from the engaging portion 31 , and a curved oil groove 321 is formed on the surface thereof for accommodating lubricating oil to provide lubricating effect. Therefore, when the shaft 32 is inserted into the sleeve 2 , the plurality of contact surfaces 22 of the sleeve 2 enclose the shaft 32 and form close contact with its outer diameter to form frictional torque.

When the utility model is actually assembled, firstly, the sleeve 2 is sleeved in the shaft hole 121 of the shaft member 1, so that at least one tenon 24 at the front end of the sleeve 2 is inserted into the selected position on the inner wall of the front opening of the shaft hole 121. In the slot 122, a positioning effect is generated. At the same time, each bent portion 21 of the sleeve 2 abuts against the inner wall of the shaft hole 121 , so that the sleeve 2 is firmly combined in the shaft hole 121 of the shaft member 1 . Finally, the shaft 32 of the pivot member 3 is inserted into the sleeve 2, so that the sleeve 2 is slightly deformed due to radial pressure, and the gap between the slots 23 is increased, and the sleeve as shown in Figure 3 is completed. The assembly process of the connecting shaft.

During implementation, because the hardness of the sleeve 2 is greater than that of the shaft tube member 1, each bending portion 21 of the sleeve 21 is pressed against the inner wall of the shaft hole 121 due to the radial pressure of the shaft rod 32, and even slightly embedded in the shaft hole 121; The tenon 24 of the cylinder 2 is engaged with the positioning groove 122 on the inner wall of the shaft hole 121, and presents a fixed state. Therefore, when the shaft 32 of the pivot member 3 rotates relative to the sleeve 2 inside the shaft member 1 , a stable friction torque is generated between each contact surface 22 of the sleeve 2 and the shaft 32 .

Therefore, through the implementation of the utility model, the enhanced effect is that the tenon at the outer end of the sleeve is locked in the preset positioning groove on the inner wall of the front opening of the shaft hole of the shaft member; when the shaft of the pivot member When the rod rotates in the sleeve, even if there is dryness caused by insufficient lubricating oil between the shaft column and the sleeve, or when the shaft hole of the shaft sleeve is combined with the sleeve, insufficient tightness due to excessive tolerance can still prevent The serious defect that the friction between the shaft and the sleeve is too large makes the sleeve slip on the inner wall of the shaft hole. At the same time, a stable torsion value can be provided between the shaft rod and the sleeve without causing variation or excessive decline of the torsion value. In particular, the arrangement of the oil groove on the surface of the shaft can accommodate lubricating grease, so that a comprehensive lubrication effect can be obtained between the shaft and the sleeve.

What the utility model discloses is a kind of preferred embodiment, and all partial changes or modifications originating from the technical thought of the utility model and easily deduced by those familiar with the technology are all within the scope of the utility model. scope of claims.

Claims (7)

1. A socketed rotating shaft, characterized in that it comprises: A shaft member, which has a connecting portion, and a shaft hole is opened in the axial direction of the cylinder body, and at least one positioning groove is axially opened on the inner wall of the front opening of the shaft hole; A sleeve, which is set in the shaft hole, is a multi-fold elastic ring body, which is formed by interlacing bending parts and adjacent contact surfaces, and an axial direction is formed at a bending part. slotting, at least one tenon protrudes radially from the front end of the sleeve, which is inserted into the positioning groove to form a buckle; and A pivot member, which has a connecting portion, and a shaft extending axially, the shaft is sleeved on the sleeve, so that the bending parts of the sleeve are pressed against the inner wall of the shaft hole due to the radial pressure of the shaft , and each contact surface of the sleeve forms a friction torque with the shaft. 2 . The sleeve-type rotating shaft as claimed in claim 1 , wherein the tenon protrudes radially from the front end of the contact surface. 3 . 3. The socket-type rotating shaft as claimed in claim 1, wherein a pair of positioning grooves are provided on the inner wall of the front opening of the shaft hole relative to the axial direction, and one of the positioning grooves is provided radially at the front end of the contact surface of the sleeve. The tenon is fastened, and the other positioning groove is adjacent to the groove of the sleeve. 4 . The sleeve-type rotating shaft as claimed in claim 1 , wherein the hardness of the sleeve is greater than that of the shaft tube member, so that each bent portion is slightly embedded in the shaft hole due to radial pressure. 5. The sleeve type rotating shaft as claimed in claim 1, wherein the surface of the shaft has a curved oil groove. 6 . The sleeve-type rotating shaft as claimed in claim 1 , wherein the connecting portion of the pivot member or the connecting portion of the shaft member respectively has at least one engaging hole. 7 . 7 . The sleeve-type rotating shaft as claimed in claim 1 , wherein the connecting portion of the pivot member or the connecting portion of the shaft cylinder member is a cylinder with a non-circular cross-section. 8 .

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