CN215634341U

CN215634341U - Motor eccentric transmission mechanism

Info

Publication number: CN215634341U
Application number: CN202122132291.8U
Authority: CN
Inventors: 董华贵
Original assignee: Dong Huagui
Current assignee: Dong Huagui
Priority date: 2021-09-03
Filing date: 2021-09-03
Publication date: 2022-01-25
Anticipated expiration: 2031-09-03

Abstract

The utility model relates to a motor eccentric transmission mechanism, which belongs to the technical field of mechanical transmission devices and comprises a motor, a main shaft and an eccentric shaft, wherein one end of the main shaft is provided with an eccentric hole, one end of the eccentric shaft is inserted in the eccentric hole, the other end of the main shaft is provided with a central hole, the hole wall of the central hole is axially provided with an exhaust groove, and a power output shaft of the motor is in interference fit in the central hole.

Description

Motor eccentric transmission mechanism

Technical Field

The utility model belongs to the technical field of mechanical transmission devices, and particularly relates to an eccentric transmission mechanism of a motor.

Background

The eccentric transmission is a common transmission mode in the mechanical field, and can realize specific mechanical action or effectively perform mechanical transmission under the condition of meeting specific space requirements. For an eccentric transmission mechanism taking a micro motor as a power source, due to the fact that the sizes of parts are small, the fit tolerance is difficult to guarantee, the situation that the fit is not in place easily occurs when a center hole of a main shaft is matched with an output shaft of the motor, and the motor is connected with the transmission mechanism insecurely.

Therefore, an eccentric transmission mechanism of a motor with more firm connection and more stable transmission is in need.

SUMMERY OF THE UTILITY MODEL

The utility model provides a motor eccentric transmission mechanism, which is used for solving the technical problems of unstable connection and unstable transmission of an eccentric transmission mechanism which takes a motor as a drive in the prior art.

The utility model is realized by the following technical scheme: the eccentric transmission mechanism of the motor comprises the motor, a main shaft and an eccentric shaft, wherein one end of the main shaft is provided with an eccentric hole, one end of the eccentric shaft is inserted into the eccentric hole, the other end of the main shaft is provided with a central hole, an exhaust groove is axially arranged on the hole wall of the central hole, and a power output shaft of the motor is in interference fit with the central hole.

In order to better implement the utility model, the structure is further optimized, and the eccentric hole and the central hole are blind holes.

In order to better realize the utility model, the structure is further optimized, the diameter of the central hole is phi, and phi is more than or equal to 1.5mm and less than or equal to 4 mm.

In order to better implement the present invention, in the above structure, the number of the exhaust grooves is four, and the four exhaust grooves are uniformly arranged along the circumferential direction.

In order to better realize the utility model, the structure is further optimized, and one side of the main shaft is provided with an exhaust hole which is communicated with the eccentric hole.

In order to better implement the utility model, the structure is further optimized, and the outer wall of the eccentric shaft is provided with an annular groove which is aligned with the exhaust hole.

In order to better implement the utility model, the structure is further optimized, and the fixing pin is in interference fit with the exhaust hole and is inserted in the annular groove.

In order to better implement the utility model, in the structure, the ports of the eccentric hole and the central hole are provided with inner chamfers.

In order to better implement the present invention, the above structure is further optimized, and the main shaft is a step shaft.

In order to better implement the utility model, the above structure is further optimized, and the main shaft and the eccentric shaft are both structural members made of metal materials.

Compared with the prior art, the utility model has the following beneficial effects:

the utility model provides a motor eccentric transmission mechanism, which comprises a motor, a main shaft and an eccentric shaft, wherein one end of the main shaft is provided with an eccentric hole, one end of the eccentric shaft is inserted in the eccentric hole, the other end of the main shaft is provided with a central hole, the hole wall of the central hole is axially provided with an exhaust groove, and a power output shaft of the motor is in interference fit in the central hole.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of the eccentric transmission mechanism of the motor according to the present invention;

FIG. 2 is a side view of the spindle of the present invention;

fig. 3 is a schematic view showing the connection of the eccentric shaft and the main shaft in embodiment 2.

In the figure:

1-a motor;

2-a main shaft; 21-eccentric hole; 22-a central hole; 221-an exhaust groove; 23-a vent hole;

3-eccentric shaft; 31-an annular groove;

4-fixed pin.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.

In the description of the present invention, it is to be noted that "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.

Example 1:

in this embodiment, as shown in fig. 1 and 2, a motor eccentric transmission mechanism includes a motor 1, a main shaft 2, and an eccentric shaft 3, where the motor 1 is a micro motor 1, and the motor 1 drives the main shaft 2 to rotate to drive the eccentric shaft 3 to make eccentric motion along an axis of the main shaft 2, specifically, one end of the main shaft 2 is provided with an eccentric hole 21, one end of the eccentric shaft 3 is inserted into the eccentric hole 21, the other end of the main shaft 2 is provided with a central hole 22, a hole wall of the central hole 22 is provided with an exhaust groove 221 along an axial direction, and a power output shaft of the motor 1 is in interference fit with the central hole 22.

By adopting the structure, the exhaust groove 221 is arranged on the hole wall of the central hole 22, so that when the output shaft of the motor 1 is inserted into the central hole 22 in an interference fit manner, the compressed air in the central hole 22 can be exhausted along the exhaust groove 221, and the air is prevented from being compressed in the central hole 22 to play a role of back pushing the output shaft of the motor 1, so that the output shaft of the motor 1 can be completely matched with the central hole 22 in place, the motor 1 and the main shaft 2 are matched more firmly, the transmission reliability is ensured, and the practicability of the utility model is stronger.

In this embodiment, as shown in fig. 1, the eccentric hole 21 and the central hole 22 are both blind holes, which facilitates machining, reduces the amount of cutting of the material of the main shaft 2, increases the structural strength of the main shaft 2, and makes it easier to grasp the depths of the eccentric hole 21 and the central hole 22 during machining, and to confirm the fit dimensions of the eccentric shaft 3 and the eccentric hole 21, and the power output shaft of the motor 1 and the central hole 22.

In this embodiment, the diameter of the central hole 22 is phi, 1.5mm or less and 4mm or less, the cross-sectional shape of the exhaust groove 221 is semicircular, the radius of the exhaust groove 221 is 0.2mm, the depth of the central hole 22 is L, 6mm or less and L or less and 10mm or less, the outer diameter of the main shaft 2 is a, 4.5mm or less and a or less and 12mm or less, the main shaft 2 is a stepped shaft, and the outer diameter of the small-diameter section of the main shaft 2 is a.

Preferably, as shown in fig. 2, the number of the exhaust grooves 221 is four, and the four exhaust grooves 221 are uniformly arranged along the circumferential direction, so that when the motor 1 and the main shaft 2 are assembled, the air in the central hole 22 can be smoothly exhausted through the four exhaust grooves 221, the power output shaft of the motor 1 can be completely fitted to the root of the central hole 22 without any obstruction, and the power output shaft of the motor 1 and the main shaft 2 can be firmly fitted.

Example 2:

In this embodiment, as shown in fig. 3, an air outlet 23 is provided at one side of the main shaft 2, the air outlet 23 is communicated with the eccentric hole 21, and when the eccentric shaft 3 and the main shaft 2 are assembled, air in the eccentric hole 21 can be exhausted through the air outlet 23, so that the air is prevented from being compressed in the eccentric hole 21 to reversely push the eccentric shaft 3, the eccentric shaft 3 can be completely matched with the eccentric hole 21, and the transmission connection between the eccentric shaft 3 and the main shaft 2 is more reliable.

Further, as shown in fig. 3, the eccentric shaft assembly further includes a fixing pin 4, the fixing pin 4 is in interference fit with the exhaust hole 23, after the eccentric shaft 3 is assembled with the main shaft 2, the exhaust hole 23 is sealed by the fixing pin 4, and the end of the fixing pin 4 abuts against the eccentric shaft 3, so that the eccentric shaft 3 is further abutted and fixed.

Preferably, as shown in fig. 3, an annular groove 31 is formed on an outer wall of the eccentric shaft 3, the annular groove 31 is aligned with the exhaust hole 23, and an end of the fixing pin 4 is inserted into the annular groove 31 to firmly limit and fix the eccentric shaft 3 in a radial direction, thereby preventing the eccentric shaft 3 from falling off during the eccentric transmission.

In this embodiment, as shown in fig. 1, the ports of the eccentric hole 21 and the central hole 22 are both provided with inner chamfers, and the power output shaft of the motor 1 and the central hole 22, and the eccentric shaft 3 and the eccentric hole 21 are conveniently inserted and connected in a matching manner through the guidance of the inner chamfers.

In this embodiment, the main shaft 2 and the eccentric shaft 3 are both structural members made of metal materials, preferably metal copper materials.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. The utility model provides a motor eccentric drive mechanism which characterized in that: the air exhaust device comprises a motor, a main shaft and an eccentric shaft, wherein an eccentric hole is formed in one end of the main shaft, one end of the eccentric shaft is inserted into the eccentric hole, a central hole is formed in the other end of the main shaft, an air exhaust groove is formed in the hole wall of the central hole in the axial direction, and a power output shaft of the motor is in interference fit with the central hole.

2. A motor eccentric drive according to claim 1, characterized in that: the eccentric hole and the central hole are blind holes.

3. A motor eccentric transmission according to claim 2, characterized in that: the diameter of the central hole is phi which is more than or equal to 1.5mm and less than or equal to 4 mm.

4. A motor eccentric transmission according to claim 3, characterized in that: the number of the exhaust grooves is four, and the four exhaust grooves are uniformly arranged along the circumferential direction.

5. A motor eccentric transmission according to any of claims 1-4, characterized in that: and an exhaust hole is formed in one side of the main shaft and communicated with the eccentric hole.

6. The eccentric motor drive of claim 5, wherein: still include the fixed pin, fixed pin interference fit is in the exhaust hole.

7. The eccentric motor drive of claim 6, further comprising: the outer wall of the eccentric shaft is provided with an annular groove, the annular groove is aligned with the exhaust hole, and the fixing pin is inserted into the annular groove.

8. The eccentric motor drive of claim 5, wherein: and the ports of the eccentric hole and the central hole are provided with inner chamfers.

9. A motor eccentric transmission according to claim 8, characterized in that: the main shaft is a step shaft.

10. A motor eccentric drive according to claim 9, characterized in that: the main shaft and the eccentric shaft are both structural parts made of metal materials.