CN212250989U - Speed reducer and rotating shaft - Google Patents

Abstract

The utility model provides a rotating shaft, be applied to the speed reducer and connect in the main shaft, the fixed ring of pivot confession is removable to be established and is contained axis body, flange, centre bore and at least one grooving. The shaft body comprises a first end and a second end, and the second end is opposite to the first end. The flange is located at the second end and projects radially outward from the shaft body. The center hole is arranged on the shaft body and used for inserting the main shaft. The groove is located at the second end and axially arranged on the shaft body and communicated with the central hole. The main shaft is inserted into the central hole from the second end, the fixing ring is sleeved on the second end to tightly clamp the main shaft, and the fixing ring is limited by the axial direction of the flange. Therefore, the fixing ring can be prevented from falling off from the rotating shaft in the assembling process of the speed reducer.

Description

Speed reducer and rotating shaft

Technical Field

The present invention relates to a speed reducer and a rotating shaft, and more particularly, to a speed reducer and a rotating shaft capable of preventing a fixing ring of the speed reducer from falling off from the rotating shaft.

Background

There are many ways of raising the output torque of the mechanism, where increasing the input power source is a more direct way, such as: however, the increase of the input power source may result in that the strength of the original transmission structure cannot be changed and the service life of the transmission structure is reduced, although the material or specification of the transmission structure may be changed, the cost is relatively increased, and the increase of the input power source means the increase of the energy consumption.

Without changing the input power source, changing the ratio of torque transmission between the input and output becomes a practical way, for example: the diameter of the input end wheel is reduced, the diameter of the output end wheel is increased, and the like, and a user can replace transmission structures with different gear ratios according to requirements to achieve output torque to be improved within an allowable range of structural strength.

Accordingly, various speed reducers have been developed to meet such demands. The speed reducer is a precise mechanism which is matched with each other through a plurality of gears, different configurations are derived according to different input sources and output mechanisms, the speed reducer comprises a gear speed reducer, a worm and gear speed reducer, a planetary speed reducer, a vertical speed reducer, a horizontal speed reducer and the like, the structure of various applications is modularized design nowadays, a user can evaluate the actual application conditions of an input power source, an output structure and the like to select the most suitable speed reducer type and specification, the structural strength does not need to be calculated by self or the time is wasted for assembling parts, and therefore the use convenience is greatly improved.

However, as the opportunities for operating various speed reducers increase, manufacturers must increase the capacity of the speed reducers to meet the market demand while maintaining good quality. Generally, the speed reducer is provided with a fixing ring, and the purpose of the fixing ring is to tightly fix the main shaft when the motor main shaft and the speed reducer are combined to achieve the tight arrangement of the motor main shaft and the speed reducer. However, when an assembly factory purchases a speed reducer from a speed reducer manufacturer and assembles the speed reducer, the fixing ring needs to be unscrewed to facilitate the motor spindle to be sleeved into the rotating shaft of the speed reducer, and the fixing ring is easy to fall off and lose.

In view of the above, it is an objective of the related manufacturers to prevent the fixing ring of the speed reducer from falling off and losing.

SUMMERY OF THE UTILITY MODEL

According to an embodiment of the present invention, a rotating shaft is provided, which is applied to a speed reducer and connected to a main shaft, wherein the rotating shaft is detachably sleeved with a fixing ring and includes a shaft body, a flange, a central hole and at least one groove. The shaft body comprises a first end and a second end, and the second end is opposite to the first end. The flange is located at the second end and projects radially outward from the shaft body. The center hole is arranged on the shaft body and used for inserting the main shaft. The at least one groove is located at the second end, and the at least one groove is axially arranged on the shaft body and communicated with the central hole. The main shaft is inserted into the central hole from the second end, the fixing ring is sleeved on the second end to tightly clamp the main shaft, and the fixing ring is limited by the axial direction of the flange.

Therefore, the groove enables the second end of the shaft body to deform in the radial direction to reduce the center hole of the shaft body, and the structural configuration of the flange can prevent the fixing ring from falling off the rotating shaft due to axial displacement, so that the loss of the fixing ring is avoided.

The shaft according to the above embodiments, wherein the flange may comprise a chamfer, which is away from the fixing ring.

In the rotating shaft according to the foregoing embodiment, the number of the at least one groove may be three, and the three grooves surround the central hole at intervals.

According to the rotating shaft of the foregoing embodiment, the rotating shaft may further include a protruding ring protruding from the shaft body in the radial direction and including a bearing surface facing the second end, a limiting groove is formed between the protruding ring and the flange, the bearing surface is abutted by the fixing ring, and the fixing ring is limited in the limiting groove.

According to one embodiment of the present invention, a reducer is connected to a main shaft and includes a rotating shaft, a sun gear, a plurality of planetary gears, and a fixing ring. The rotating shaft is connected with the main shaft and comprises a shaft body, a flange, a central hole and at least one groove. The shaft body comprises a first end and a second end, the flange is located at the second end and protrudes outwards from the shaft body in the radial direction, the central hole is formed in the shaft body and used for inserting the main shaft, the at least one cutting groove is located at the second end, and the at least one cutting groove is axially formed in the shaft body and communicated with the central hole. The sun gear is located at the first end. The plurality of planetary gears are engaged with the sun gear. The fixing ring is detachably sleeved at the second end of the rotating shaft. The main shaft is inserted into the central hole from the second end, the main shaft is tightly pressed by the fixing ring, and the fixing ring is axially limited by the flange.

In the reducer according to the foregoing embodiment, the fixing ring may further include a main body, a shaft hole, and a slot. The shaft hole axially penetrates through the main body and is used for inserting the rotating shaft. The slot is opened in the main part so that the main part forms a C-shaped structure.

According to the speed reducer of the foregoing embodiment, the fixing ring may further include a tightening mechanism disposed on the main body to reduce the slot, so that the inner wall of the fixing ring tightens the rotating shaft.

In the reducer according to the foregoing embodiment, the flange may include a chamfer, which is away from the fixing ring.

In the speed reducer according to the foregoing embodiment, the number of the at least one groove is three, and the three grooves surround the central hole at intervals.

According to the speed reducer of the foregoing embodiment, the rotating shaft may further include a protruding ring protruding radially from the shaft body and including a bearing surface facing the second end, a limiting groove is formed between the protruding ring and the flange, the bearing surface is abutted by the fixing ring, and the fixing ring is limited in the limiting groove.

Drawings

Fig. 1 is a schematic perspective view illustrating a speed reducer according to an embodiment of the present invention;

FIG. 2 illustrates a partial exploded view of the reducer of the embodiment of FIG. 1;

FIG. 3 is a perspective view of the rotating shaft and the fixing ring of the embodiment of FIG. 1;

FIG. 4 is a side view of the spindle of the embodiment of FIG. 1;

FIG. 5 is a perspective view of the retaining ring of the embodiment of FIG. 1; and

FIG. 6 is a cross-sectional view of the shaft and the retaining ring of the embodiment of FIG. 3 along section line 6-6.

Detailed Description

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. For the purpose of clarity, numerous implementation details are set forth in the following description. However, the reader should understand that these implementation details should not be used to limit the present invention. That is, in some embodiments of the present invention, these implementation details are not necessary. In addition, for the sake of simplicity, some conventional structures and elements are shown in the drawings in a simplified schematic manner; and repeated elements will likely be referred to using the same reference number or similar reference numbers.

In addition, when an element (or a mechanism or a module, etc.) is "connected," "disposed" or "coupled" to another element, it can be directly connected, disposed or coupled to the other element, or it can be indirectly connected, disposed or coupled to the other element, that is, there are other elements between the element and the other element. When an element is explicitly connected, directly disposed, or directly coupled to another element, it is intended that no other element is interposed between the element and the other element. The terms first, second, third, etc. are used merely to describe various elements or components, but the elements/components themselves are not limited, and thus, the first element/component may be alternatively referred to as the second element/component. And the combination of elements/components/mechanisms/modules herein is not a commonly known, conventional or custom combination in the art, and it is not readily ascertainable whether the combination is readily accomplished by one skilled in the art based on whether the elements/components/mechanisms/modules themselves are conventional.

Referring to fig. 1, fig. 2, fig. 3 and fig. 4, wherein fig. 1 is a schematic perspective view illustrating a speed reducer 10 according to an embodiment of the present invention; FIG. 2 illustrates an exploded view of a portion of the reducer 10 of the embodiment of FIG. 1; FIG. 3 is a perspective view of the rotating shaft 100 and the fixing ring 400 of the embodiment shown in FIG. 1; fig. 4 is a side view of the hinge 100 of the embodiment of fig. 1. As shown in fig. 1 and 2, the reducer 10 is connected to a main shaft (not shown) and includes a rotating shaft 100, a sun gear 200, a plurality of planetary gears 300, and a fixing ring 400. As shown in fig. 3 and 4, the rotating shaft 100 may be connected to the main shaft and includes a shaft body 110, a flange 120, a central hole 130 and at least one groove 140, the shaft body 110 includes a first end 111 and a second end 112, the flange 120 is located at the second end 112 and protrudes radially outward from the shaft body 110, the central hole 130 penetrates through the shaft body 110 and is used for the main shaft to be inserted, the groove 140 is located at the second end 112, and the groove 140 is axially opened in the shaft body 110 and is communicated with the central hole 130. The sun gear 200 is located at the first end 111, and the plurality of planetary gears 300 are engaged with the sun gear 200, and the torque from the power source is converted in a certain ratio by changing the ratio of the number of teeth between the two, and then transmitted to the output end. The fixing ring 400 is detachably sleeved on the second end 112 of the rotating shaft 100. The main shaft is inserted into the central hole 130 from the second end 112, the fixing ring 400 can tightly urge the main shaft, and the fixing ring 400 is axially limited by the flange 120.

Therefore, the groove 140 allows the second end 112 of the shaft 110 to deform in the radial direction to reduce the central hole 130, and the structural configuration of the flange 120 prevents the fixing ring 400 from falling off the rotating shaft 100 due to axial displacement, thereby preventing the fixing ring 400 from being lost.

In detail, the second end 112 and the first end 111 of the rotating shaft 100 can be used for connecting the main shaft and the driven mechanism, respectively. As shown in fig. 3, the number of the grooves 140 of the rotating shaft 100 may be three, and the three grooves 140 surround the central hole 130 at intervals and penetrate through the shaft wall in the radial direction to communicate with the central hole 130, when the second end 112 of the shaft body 110 is pressed by the fixing ring 400, the stress may be uniformly distributed on the shaft body 110, so that the shaft wall of the shaft body 110 may be inwardly contracted by equal deformation, and the rotating shaft 100 and the main shaft may be coaxially connected and tightly combined. However, the number of the grooves 140 and the length thereof extending in the axial direction can be changed according to the actual requirement, and the present invention is not limited thereto.

As shown in fig. 4, the shaft 100 may further include a protruding ring 150 protruding radially from the shaft body 110 and including a bearing surface 160 facing the second end 112, a limiting groove 170 is formed between the protruding ring 150 and the flange 120, the bearing surface 160 may allow one side of the fixing ring 400 to axially abut against, and the fixing ring 400 may be limited in the limiting groove 170. The bearing surface 160 provides a limit to prevent the retaining ring 400 from being displaced toward the first end 111, while the flange 120 provides a limit on the other side of the retaining ring 400 to limit the amount of axial displacement of the retaining ring 400 toward the second end 112, thereby effectively positioning the retaining ring 400 with both axial limits.

Referring to fig. 5 and fig. 4, fig. 5 is a schematic perspective view of the retaining ring 400 of the embodiment of fig. 1. As shown in fig. 5, the fixing ring 400 may further include a main body 410, a shaft hole 420, and a slot 430. The shaft hole 420 axially penetrates the body 410 and is used for inserting the rotating shaft 100. The slot 430 is opened in the body 410 such that the body 410 forms a C-shaped structure. The size of the axial bore 420 can be varied by varying the size of the slot 430.

In detail, the retaining ring 400 may further include a tightening mechanism 440, such as: bolts, threads, buckles, hooks, or the like are disposed on two sides or the periphery of the slot 430 of the main body 410, and the tightening mechanism 440 is adjusted to reduce the slot 430, so that the second end 112 of the shaft body 110 can be radially deformed to reduce the central hole 130 thereof in cooperation with the groove 140, thereby tightening the spindle to the rotating shaft 100.

Referring to fig. 6 and fig. 5, fig. 6 is a schematic cross-sectional view of the rotating shaft 100 and the fixing ring 400 of the embodiment of fig. 3 along a sectional line 6-6. The flange 120 may include a chamfer 121 away from the fixing ring 400, and the chamfer 121 is a slope structure of the flange 120 with a gradually enlarged diameter from the second end 112 to the first end 111 in the axial direction, so that the fixing ring 400 can be more smoothly sleeved on the second end 112 of the rotating shaft 100 during initial installation. Although the angle and the relative size of the chamfer 121 can be changed according to the actual requirement, the present invention is not limited thereto.

Although the present invention has been described with reference to the above embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention, and therefore, the scope of the invention is to be defined by the appended claims.

[ notation ] to show

10 speed reducer

100: rotating shaft

110 shaft body

111 first end

112 second end

120: flange

121 is chamfer

130 center hole

140 cutting groove

150 convex ring

160 bearing surface

170 limiting groove

200 sun gear

300 planetary gear

400 fixing ring

410 main body

420 shaft hole

430, slotting

440, a tightening mechanism.

Claims (10)

1. The utility model provides a rotating shaft, is applied to the speed reducer and connects in the main shaft, and this rotating shaft supplies solid fixed ring detachably to overlap and establishes and its characterized in that contains:

a shaft body including:

a first end; and

a second end disposed opposite the first end;

a flange located at the second end and protruding radially outward from the shaft body;

the central hole is arranged in the shaft body and is used for inserting the main shaft; and

at least one groove is positioned at the second end and axially arranged on the shaft body and communicated with the central hole;

the spindle is inserted into the central hole from the second end, the fixing ring is sleeved on the second end to tightly press the spindle, and the fixing ring is axially limited by the flange.

2. The spindle of claim 1 wherein the flange comprises:

and chamfering is carried out, and the chamfering is far away from the fixing ring.

3. The spindle of claim 1 wherein the at least one groove is three in number, and the three grooves are spaced around the central hole.

4. A hinge as defined in claim 1, further comprising:

the convex ring protrudes out of the shaft body in the radial direction and comprises a bearing surface facing the second end, a limiting groove is formed between the convex ring and the flange, the bearing surface is abutted by the fixing ring, and the fixing ring is limited in the limiting groove.

5. A speed reducer is connected to a main shaft and is characterized by comprising:

a rotating shaft connected with the main shaft and including:

a shaft body including a first end and a second end;

a flange located at the second end and protruding radially outward from the shaft body;

the central hole is arranged in the shaft body and is used for inserting the main shaft; and

at least one groove is positioned at the second end and axially arranged on the shaft body and communicated with the central hole;

a sun gear located at the first end;

a plurality of planetary gears meshed with the sun gear; and

the fixing ring is detachably sleeved at the second end of the rotating shaft;

the spindle is inserted into the central hole from the second end, the fixing ring is tightly pressed on the spindle, and the fixing ring is axially limited by the flange.

6. The reducer of claim 5, wherein the retaining ring further comprises:

a main body;

the shaft hole axially penetrates through the main body and is used for inserting the rotating shaft; and

the slot is arranged on the main body so that the main body forms a C-shaped structure.

7. The reducer of claim 6, wherein the retaining ring further comprises:

the tightening mechanism is arranged on the main body to reduce the slot, so that the inner wall of the fixing ring tightens the rotating shaft.

8. The reducer of claim 6, wherein the flange comprises:

and chamfering is carried out, and the chamfering is far away from the fixing ring.

9. The reducer of claim 6, wherein the number of the at least one groove is three, and the three grooves surround the central hole at intervals.

10. The reducer of claim 6, wherein the shaft further comprises:

the convex ring protrudes out of the shaft body in the radial direction and comprises a bearing surface facing the second end, a limiting groove is formed between the convex ring and the flange, the bearing surface is abutted by the fixing ring, and the fixing ring is limited in the limiting groove.

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