CN201228716Y - Cam assembly for rotating shaft - Google Patents

Abstract

The utility model relates to a cam assembly for pivot, it includes: the vertical frame surface of the fixing frame is provided with a shaft hole, the bottom of the frame surface transversely extends to form a joint part, the periphery of the shaft hole is provided with at least two first interference elements in wedge-shaped concave parts, an included angle is formed between waist parts at two sides of each first interference element, the included angles of the plurality of first interference elements are respectively arranged in sequence towards the axial direction and the radial direction, and two sides of the waist part of each first interference element are respectively adjacent to an inclined plane which is obliquely cut upwards; and a sliding part, which is butt jointed with one side of the frame surface and is provided with an embedding hole, the periphery of the embedding hole is provided with second interference elements which have the same shape and size and are wedge-shaped bulges corresponding to the positions of the first interference elements, waist parts at two sides of each second interference element are also provided with an included angle, the included angles of the plurality of second interference elements are respectively arranged in sequence towards the axial direction and the radial direction, and two sides of the waist part of each second interference element are respectively adjacent to an inclined plane which is obliquely cut downwards.

Description

Cam assembly for shaft

technical field

The utility model relates to a cam assembly, in particular to a cam assembly for a rotating shaft. The cam assembly saves components and has the function of automatic closing without losing the rotating shaft.

Background technique

Consumer 3C electronic products with a flip cover, such as portable computers, electronic dictionaries, portable audio-visual playback devices, and flip-top mobile phones, etc., generally place the main body in the lower half and pass through the shaft It is connected with the upper half of the cover so that the cover 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.

However, for the aforementioned 3C electronic products, in order to avoid arbitrary opening and closing of the main body and the cover, at least one sliding or pressing switch is usually provided at the open end between the two, so that when closing, the etc. The switch combines the two while it is off. And related industry is for avoiding the inconvenience that sliding type closes off or push-type switch is set at the open end of this electronic product, therefore, as the utility model applicant's possession of the Taiwan Patent Announcement No. M296586 patent case "with automatic lock" As shown in the structure of the rotating shaft, it is combined with a set of cam members on the rotating shaft, wherein the cam member is formed by a butt joint of a fixing part and a sliding part, so that it has an automatic closing effect.

That is to say, take the traditional cam member as an example, which is composed of a fixed part and a sliding part. If it is applied to the rotating shaft, the fixed part is fixed on an object, such as a bracket; and the sliding part corresponds to the shaft. An embedding hole is opened in the cross-section for it to pass through, so that it can act synchronously with the shaft, and one side of the sliding part is adjacent to an elastic body. In order to make the cam member have an automatic closing effect, the adjoining surfaces of the fixing piece and the sliding piece are oppositely provided with a convex portion and a concave portion, and in order to make both of them rotate smoothly, the number of the convex portion and the concave portion It is better to have two or more than two and equiangular settings.

For example, the "cam member for reducing abnormal sound" in Taiwan Patent Announcement No. M309841 owned by the applicant of the utility model, the first interference element of the fixing part is a protrusion, which is located on the concentric outer ring of the fixing part A first outer slider and a first inner slider with different timings are arranged opposite to the inner ring; and the second interference element of the slider is a concave part, which is arranged opposite to the concentric outer ring and inner ring of the slider. There are a first outer chute and a first inner chute with different timings. Through the above-mentioned implementation, when the concave part of the sliding part is rotated from the locked position to the opposite end, because the fixing part has no protruding part, the problem of re-locking will not be caused. Certainly, the cam member of this case only has an automatic locking position, that is, the first outer and inner sliding grooves of the sliding part are respectively engaged with the first outer and inner sliding blocks of the fixing part. However, these outer and inner sliders are in the shape of a long arc with a large area, and under the condition of repeated rotation and friction with the slider, it is easy to cause excessive wear and tear, thereby reducing the service life of the cam member. Fly in the ointment.

In addition, the fixing part of the traditional cam member protrudes at least one tenon with a non-circular cross-section from one side of the ring body or an extension part, so as to be inserted into the correspondingly shaped tenon groove of the bracket to form both fixed connection. This move not only increases the assembly process, but also increases the manufacturing cost, which urgently needs to be improved by the relevant industry.

In view of this, the applicant of the present utility model has been engaged in the design, production and sales of rotating shafts for many years, hoping to overcome the situation that the protruding part of the cam member with a single automatic locking function in the prior art is prone to excessive wear due to its long length , and further damage the serious lack of service life of the entire rotating shaft, and the inconvenience that the fixing part of the cam member needs to be combined with the bracket of the rotating shaft. After repeated experiments and tests, the cam assembly for the rotating shaft of the present utility model has been developed.

Utility model content

The main purpose of the utility model is to provide a cam assembly for a rotating shaft, which has a simplified structure, can reduce the setting of the fixing parts of the cam assembly, and can reduce wear and tear, and increase the service life of the rotating shaft. .

The secondary purpose of the present invention is to provide a cam assembly for a rotating shaft by changing the shape of the protruding portion and the concave portion so that both of them have only a single automatic locking position.

In order to achieve the above-mentioned purpose, the technical means adopted by the utility model is to provide a cam assembly for a rotating shaft, which includes: a fixed frame, a shaft hole is opened on the upright frame surface, and the bottom of the frame surface extends transversely to a joint The peripheral edge of the shaft hole is provided with at least two first interference elements that are wedge-shaped concave parts. There is an included angle between the waists on both sides of each first interference element, and the included angles of the plurality of first interference elements face the axial direction and radial Arranged in sequence, and the two sides of the waist of each first interference element are respectively adjacent to an upwardly sloped slope; The position of the first interference element is provided with a second interference element with the same shape and size, and a wedge-shaped protrusion. The waists on both sides of each second interference element also have an included angle, and the included angle of the plurality of second interference elements is They are respectively arranged in sequence in the axial direction and radial direction, and the two sides of the waist of each second interference element are respectively adjacent to a downwardly inclined slope.

Another technical measure adopted by the utility model is to provide a cam assembly for a rotating shaft, which includes: a fixed frame, a shaft hole is opened on the upright frame surface, and a joint part extends laterally from the bottom of the frame surface, and the shaft The periphery of the hole is provided with at least two first interference elements that are wedge-shaped protrusions. There is an included angle between the waists on both sides of each first interference element. Arranged sequentially, and the two sides of the waist of each first interference element are respectively adjacent to a downwardly inclined inclined surface; The position of the interference element is provided with a second interference element with the same shape and size, and a wedge-shaped concave part. The waists on both sides of each second interference element also have an included angle, and the included angles of the plurality of second interference elements are respectively facing the axis. Arranged in sequence in the direction and radial direction, and the two sides of the waist of each second interference element are respectively adjacent to an upwardly inclined slope.

The beneficial effect of the utility model is that the provided cam assembly for the rotating shaft has a simplified structure, can reduce the setting of the fixing parts of the cam assembly, and can reduce wear and tear.

In order to further reveal the specific technical content of the utility model, first please refer to the drawings, wherein:

Description of drawings

Fig. 1 is the three-dimensional exploded view of the first embodiment of the cam assembly for the rotating shaft of the present invention;

Fig. 2 is a perspective view after Fig. 1 is assembled;

Fig. 3 is a sectional view of the cam assembly shown in Fig. 1 rotated 180 degrees;

Fig. 4 is a three-dimensional exploded view of the second embodiment of the cam assembly of the present invention;

Figure 5 is a perspective view of Figure 4 after assembly;

Fig. 6 is a sectional view of the cam assembly shown in Fig. 4 rotated 120 degrees.

Detailed ways

As shown in Figures 1 to 2, basically, the first embodiment of the utility model shaft is composed of a pivot member 1, a cam assembly 2, a friction plate 3, at least one elastic body 4, and an end seal A combination of 5. Wherein, the cam assembly 2 is composed of a fixing frame 21 and a sliding part 22 .

Wherein, the pivot member 1 is a rod body, which is composed of a shaft rod 11 and a connecting portion 12. The cross section of the shaft rod 11 is non-circular so as to be compatible with the sliding member 22 and the cam assembly 2 described later. The friction plate 3 is socketed so that it can act synchronously with the shaft rod 11 . Furthermore, the free end of the shaft 11 has a coupling section 111, which is combined with the end seal 5 described later, so that the components described later will not axially escape.

The connecting part 12 is connected with an article, such as the cover body, as shown in the figure, it is a non-circular column with a cross section, so that it can be directly inserted into the cover body, or combined with a fixed seat, which There are multiple perforations to facilitate locking on the cover body.

The cam assembly 2 includes a fixing frame 21 and a sliding part 22, and the fixing frame 21 and the sliding part 22 can be made by powder injection or stamping process. The upright frame surface 211 of the fixing frame 21 defines a shaft hole 212 for the shaft rod 11 to pass through. In addition, the fixing frame 21 is further provided with a joint portion 213, which is fixedly connected to another article, such as the main body. The fasteners, such as screws, pass through and are locked on the main body.

The creative feature of the fixed frame 21 is that at least two first interference elements 215 are arranged on the periphery of the axis hole 212 on one side of the frame surface 211. As shown in FIG. There is an included angle between the side waist portions 215a, and the included angles of the two first interference elements 215 may be the same or different, and the included angles of the two first interference elements 215 are respectively directed toward the axial direction (inward) and the radial direction ( outward) in sequence, and each waist 215a is adjacent to an upwardly inclined inclined surface 215b on both sides.

The sliding part 22 is a ring body, which is docked with the frame surface 211 of the fixed frame 21, and has an embedded hole 221 in the center. move.

The joint surface of the slider 22 adjacent to the frame surface 211 is respectively provided with a second interference element 222 corresponding to the position of each first interference element 215, and the two second interference elements 222 are wedge-shaped protrusions with waists 222a on both sides. Also has an included angle, the included angles of the two second interference elements 222 can be the same or different, and the included angles of the two second interference elements 222 are respectively directed toward the axial direction (inward) and the radial direction (outward). Arranged sequentially, and two sides of each waist portion 222a are respectively adjacent to a downwardly inclined slope 222b.

Wherein, the arrangement of the wedge-shaped concave portion and the wedge-shaped protruding portion of the first and second interference elements 215, 222 is not limited to the above, and they must also be replaced with each other, that is, the first interference element 215 of the fixing frame 21 is wedge-shaped The protrusion, and the second interfering element 222 of the slider 22 is a wedge-shaped recess, which can also achieve the function of having a single automatic locking position.

The friction plate 3 is a metal sheet body, which is arranged between the shaft 11 and the frame surface 211, and after the shaft column 11 passes through, it can be linked with it, so that the contact part of the friction plate 3 and the frame surface 211 forms a friction. In order to provide a further lubricating effect, a plurality of oil holes 31 are provided on the periphery of the friction plate 3 for accommodating lubricating grease.

The elastic body 4 is sleeved on the shaft 11 so that the slider 22 can move axially on the shaft 11 . When the elastic body 4 is implemented, as shown in the figure, it is a disc-shaped shrapnel, but it is not limited thereto. It can also be a wave shrapnel or a spring to obtain the same effect.

The end seal 5 is a joint section 111 combined with the shaft 11 , and is used to standardize the components to be exposed so as not to come out from the shaft 11 . The end seal 5 is implemented as an anti-loosening nut.

After the utility model is assembled according to the foregoing description, as shown in FIG. 2 , the fixed frame 21 and the sliding member 22 of the cam assembly 2 are in a docking state. At this time, the two second interference elements 222 with different widths are engaged in the first interference element 215 with the same shape and size, so that the cover body is in a locked state relative to the main body. And when the cover is opened, the shaft 11 of the pivot member 1 rotates with the cover, so that the friction plates 3 and the sliding member 22 also rotate synchronously, so that the inclined surfaces 222b of the second interference elements 222 Climb upwards along the slope 215b of the first interference element 215 .

Since the pair of first and second interference elements 215, 222 are in the locked state, the included angles between the two waist portions 215a and 222a have the same direction, for example, they both face forward. Therefore, when rotating 180 degrees, as shown in FIG. 3 , the angles between the pair of second interference elements 222 and the pair of first interference elements 215 form a pair facing backward and a pair facing forward, so that each second interference element The element 222 (shown by hatching) abuts against the planes on both sides of the first interfering element 215 so as not to fall into the first interfering element 215 and has the function of a single automatic locking position. In particular, the second interfering element 222 of the present invention is a wedge-shaped protrusion. Compared with the prior art, the inner and outer rings of the cam assembly with long arc-shaped bumps and grooves are arranged, because the friction surface is large. Reduced, thereby reducing the generation of wear, thereby achieving the effect of extending the service life of the transfer.

Please refer to Fig. 4 to Fig. 5, which shows a schematic diagram of the second embodiment of the utility model rotating shaft, wherein the pivot is also composed of a pivot member 1, a cam assembly 2, a friction plate 3, At least one elastic body 4 and one end seal 5 are combined. The difference between this embodiment and the preceding embodiments is that three first interference elements 215 and second interference elements 222 are equiangularly arranged on the frame surface 211 of the fixed frame 21 and the joint surface of the sliding member 22, such as wedge-shaped recesses and wedge-shaped protrusion.

As mentioned above, the included angles of the three first interfering elements 215 and the second interfering elements 222 are respectively arranged in sequence towards the axial direction (inward) and the radial direction (outward). Therefore, as shown in Figure 6, when the slider 22 rotates 120 degrees in the counterclockwise direction, its first and second second interference elements 222 (shown in hatching) move against the second and second interference elements 222 due to movement. The planes on both sides of the three first interference elements 215 will not fall into them; and the third second interference element 222 is displaced to the first first interference element 215 of the same shape and size. The two interfering elements 222 are supported by the other two second interfering elements 222 so as not to fall into the first interfering element 215 to form an automatic locking state.

Therefore, through the implementation of the present utility model, the enhanced effect is that the single fixed frame has the functions of the support of the prior art rotating shaft and the function of the fixing part of the cam assembly, therefore, the number of components can be reduced, the assembly process can be reduced, and The advantage of reducing manufacturing costs. Moreover, because the included angles of the at least two first and second interference elements are respectively arranged towards the axial direction (inward) and the radial direction (outward), therefore, when the sliding member is about to rotate out of the locked state, its When the interfering element moves to the interfering element of the fixing part, the shape and/or size of the two interfering elements cannot match, so that no butting effect will be produced, so that the cam assembly has only a single automatic locking position. In particular, because the protruding interference element of the utility model is a wedge-shaped block instead of a long arc-shaped block, it can effectively reduce the contact area with the fixing part to reduce the generation of wear, thereby increasing the shaft Long service life, it is truly a masterpiece that has never been seen before for similar items.

What the utility model discloses is a kind of preferred embodiment, for example, all partial changes or modifications derived from the technical thought of the utility model and those who are familiar with the art are easy to infer, all of which do not depart from the utility model scope of patent rights.

Claims (8)

1. Cam set assembly that is used for rotating shaft is characterized in that comprising:

One fixing frame, its vertical frame face is opened an axis hole, this face bottom transverse is extended a joining portion, this axis hole periphery is provided with at least two first interference elements that are the wedge shape reentrant part, has an angle between each first interference element both sides waist, the angle of these a plurality of first interference elements is to arrange in regular turn towards axially reaching radially respectively, and each first interference element waist both sides is separately in abutting connection with an inclined-plane of upwards splaying; And

One slider, be to dock with a side of frame face, it opens an embedding hole, this embedding hole peripheral is provided with appearance and measure-alike corresponding to each first interference element position, and second interference element that is the wedge shape bump, each second interference element both sides waist also has an angle, and the angle of this a plurality of second interference elements is respectively towards axially and radially arranging in regular turn, and adjacency one inclined-plane of splaying downwards separately, each second interference element waist both sides.

2. the Cam set assembly that is used for rotating shaft as claimed in claim 1 is characterized in that, this fixed block is identical or different with the angle of two waists of at least two first, second interference elements of slider.

3. the Cam set assembly that is used for rotating shaft as claimed in claim 1 is characterized in that, at least one hole that connects is opened at the joining portion of this fixing frame.

4. the Cam set assembly that is used for rotating shaft as claimed in claim 1 is characterized in that, the axis hole of this face is circular, and the embedding hole of slider is non-circular geometric modelling.

5. Cam set assembly that is used for rotating shaft is characterized in that comprising:

One fixing frame, its vertical frame face is opened an axis hole, this face bottom transverse is extended a joining portion, this axis hole periphery is provided with at least two first interference elements that are the wedge shape bump, has an angle between each first interference element both sides waist, the angle of these a plurality of first interference elements is to arrange in regular turn towards axially reaching radially respectively, and each first interference element waist both sides is separately in abutting connection with an inclined-plane of splaying downwards; And

One slider, be to dock with a side of frame face, it opens an embedding hole, this embedding hole peripheral is provided with appearance and measure-alike corresponding to each first interference element position, and second interference element that is the wedge shape reentrant part, each second interference element both sides waist also has an angle, and the angle of this a plurality of second interference elements is respectively towards axially and radially arranging in regular turn, and adjacency one inclined-plane of upwards splaying separately, each second interference element waist both sides.

6. the Cam set assembly that is used for rotating shaft as claimed in claim 5 is characterized in that, this fixed block is identical or different with the angle of two waists of at least two first, second interference elements of slider.

7. the Cam set assembly that is used for rotating shaft as claimed in claim 5 is characterized in that, at least one hole that connects is opened at the joining portion of this fixing frame.

8. the Cam set assembly that is used for rotating shaft as claimed in claim 5 is characterized in that, the axis hole of this face is circular, and the embedding hole of slider is non-circular geometric modelling.

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