CN216929781U

CN216929781U - Novel linear motion mechanism

Info

Publication number: CN216929781U
Application number: CN202122503922.2U
Authority: CN
Inventors: 段文武; 吴雯; 李绍安
Original assignee: Motus Technology Wuhan Co ltd
Current assignee: Motus Technology Wuhan Co ltd
Priority date: 2021-10-18
Filing date: 2021-10-18
Publication date: 2022-07-08
Anticipated expiration: 2031-10-18

Abstract

The utility model discloses a novel linear motion mechanism which comprises a motor shell, a motor front end cover and a motor rear end cover, wherein the motor front end cover and the motor rear end cover are arranged at two ends of the motor shell, a stator and a rotor are sequentially sleeved in the motor shell 2, and a hollow rotor shaft is arranged in the rotor. The utility model simplifies the conventional design structure of the electric cylinder from the source to reduce the zero length of the electric cylinder, provides a novel linear motion mechanism, has the characteristics of simple structure, easy assembly, short and small size, zero length, low overall cost and the like, can reduce the design, production, assembly and use costs, is particularly suitable for application occasions with compact space, can reduce the motion envelope space of equipment, and further eliminates the possibility of interference between the equipment and peripheral facilities.

Description

Novel linear motion mechanism

Technical Field

The utility model relates to the technical field of linear motion structures, in particular to a novel linear motion mechanism.

Background

In the era of industrial automation, linear motion mechanisms are widely applied, particularly in various simulator industries, and the most applied linear motion mechanism is an electric cylinder. The electric cylinder is a modularized product which is designed by combining a servo motor and a screw rod, mainly comprises the parts such as the servo motor, a motor mounting flange, a bearing seat, the screw rod, a coupling, a piston rod, a cylinder barrel and the like, takes a finished motor as a direct power source, and can realize the reciprocating linear telescopic motion function similar to that of an air cylinder and an oil cylinder.

In the electric cylinder, a motor generally drives a screw rod or a synchronizing wheel to rotate through a coupler, so that reciprocating movement of a screw rod nut is realized, and a piston rod connected with the screw rod nut is driven to perform telescopic motion in a cylinder barrel. When the electric cylinder moves, the piston rod is completely extended, and the total length of the electric cylinder is the longest cylinder length. If the piston rod is completely retracted, the electric cylinder is always the shortest cylinder length at the moment. The difference between the longest cylinder length and the shortest cylinder length is the electric cylinder stroke, and the difference between the shortest cylinder length and the electric cylinder stroke is the zero length of the electric cylinder. For the application occasion that the space is comparatively compact, short zero-length electronic jar is conveniently arranged. Meanwhile, for the application occasions with the same use stroke, the short zero-length electric cylinder can reduce the overall size of the equipment, so that the overall equipment design cost is reduced, and the equipment motion envelope space is reduced.

Therefore, a novel linear motion mechanism is produced. Compared with a direct-connected electric cylinder, the direct-connected electric cylinder has no parts such as a coupler, a piston rod, a cylinder barrel and the like, the space size and the cost are greatly reduced, and the application range is wider.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present invention provides a novel linear motion mechanism.

The utility model is realized by the following technical scheme.

The utility model provides a novel linear motion mechanism, includes motor housing and installs motor front end housing, the motor rear end cap at motor housing both ends, the cover is equipped with stator and rotor in proper order in the motor housing, install hollow rotor shaft in the rotor.

Preferably, the front end cover and the rear end cover of the motor are provided with angular contact bearings for fixing the axial movement of the rotating shaft, the angular contact bearings are locked by the locking nuts, and one end of each angular contact bearing is further provided with a gland for preventing the axial movement of the angular contact bearing.

Preferably, after the rotor shaft is thermally expanded, the rotor is sleeved outside the rotor shaft.

Preferably, the rotor shaft is provided with a belt wheel used for being connected with an encoder.

Preferably, a screw nut and a screw rod are installed in the rotor shaft, and the rotor shaft is connected with the screw nut through a screw.

In the utility model, the installation mode of the encoder is the installation mode of another invention patent 'a novel encoding motor' of the company, and the rotor shaft is provided with a belt wheel to drive another belt wheel provided with the encoder to rotate. The motor rotor drives the rotor shaft to rotate and then drives the screw rod nut to rotate, so that reciprocating linear motion of the screw rod is realized.

The utility model has the beneficial effects that: the utility model simplifies the conventional design structure of the electric cylinder from the source to reduce the zero length of the electric cylinder, provides a novel linear motion mechanism, has the characteristics of simple structure, easy assembly, short and small size, zero length, low overall cost and the like, can reduce the design, production, assembly and use costs, is particularly suitable for application occasions with compact space, can reduce the motion envelope space of equipment, and further eliminates the possibility of interference between the equipment and peripheral facilities.

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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a cross-sectional view of the present invention;

fig. 2 is an isometric view of the present invention.

In the figure: 1. a motor front end cover; 2. a motor housing; 3. a stator; 4. a rotor; 5. a motor rear end cover; 6. an angular contact bearing; 7. a gland; 8. a rotor shaft; 9. a four-bar nut; 10. a screw rod; 11. a pulley; 12. and locking the nut.

Detailed Description

The technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" 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 be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention will be described in further detail below with reference to specific embodiments and with reference to the attached drawings.

Example 1

As shown in fig. 1, a novel linear motion mechanism comprises a motor housing 2, a motor front end cover 1 and a motor rear end cover 5 which are arranged at two ends of the motor housing 2, wherein a stator 3 and a rotor 4 are sequentially sleeved in the motor housing 2, and a hollow rotor shaft 8 is arranged in the rotor 4.

The motor front end cover 1 and the motor rear end cover 5 are provided with angular contact bearings 6 for fixing the rotating shaft 8 to move axially, the angular contact bearings 6 are locked by the locking nuts 12, and one end of each angular contact bearing 6 is also provided with a gland 7 for preventing the angular contact bearing 6 from moving axially.

The rotor 4 is sleeved outside the rotor shaft 8 after thermal expansion.

And a belt wheel 11 used for being connected with an encoder is arranged on the rotor shaft 8.

And a screw rod nut 9 and a screw rod 10 are installed in the rotor shaft 8, and the rotor shaft 8 is connected with the screw rod nut 9 through a screw.

The original rotor shaft 8 of the motor is made into a hollow shape, and the rotor 4 is sleeved after thermal expansion, so that the rotor shaft 8 and the motor rotor 4 are integrated. The stator 3 is sleeved into the motor shell 2, the two ends of the motor shell are respectively provided with a motor front end cover 1 and a motor rear end cover 5, the motor front end cover 1 and the motor rear end cover 5 are respectively provided with paired angular contact bearings 6, and the angular contact bearings are locked by locking nuts 12 to fix the axial movement freedom degree of the rotor shaft 8. The lead screw nut 9 and the lead screw 10 are sleeved in the rotor shaft 8, the rotor shaft 8 is connected with the lead screw nut 9 through a screw, and the installation form of the encoder is based on another invention patent of the company-. The motor rotor 4 drives the rotor shaft 8 to rotate, and then drives the screw rod nut 9 to rotate, so that the reciprocating linear motion of the screw rod 10 is realized.

Compared with the traditional electric cylinder, the finished motor is not used, and certain structures of the motor are changed. The shaft coupling, the piston rod, the cylinder barrel and other parts are not used, the space size and the cost are greatly reduced, and the application range is wider.

The utility model has the beneficial effects that: the utility model simplifies the conventional design structure of the electric cylinder from the source to reduce the zero length of the electric cylinder, provides a novel linear motion mechanism, has the characteristics of simple structure, easy assembly, short and concise structure, zero length, low cost and the like, can reduce the design, production, assembly and use costs, is particularly suitable for application occasions with compact space, can reduce the motion envelope space of equipment, and further eliminates the possibility of interference between the equipment and peripheral facilities.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions deviate from the technical solutions of the embodiments of the present invention.

Claims

1. The utility model provides a novel linear motion mechanism, its characterized in that includes motor housing (2) and installs motor front end housing (1), motor rear end cap (5) at motor housing (2) both ends, the cover is equipped with stator (3) and rotor (4) in proper order in motor housing (2), install hollow rotor shaft (8) in rotor (4).

2. The novel linear motion mechanism is characterized in that angular contact bearings (6) used for fixing the axial motion of the rotor shaft (8) are mounted on the motor front end cover (1) and the motor rear end cover (5), the angular contact bearings (6) are locked through locking nuts (12), and a gland (7) used for preventing the axial motion of the angular contact bearings (6) is further arranged at one end of each angular contact bearing (6).

3. A novel linear motion mechanism according to claim 1, characterized in that the rotor shaft (8) is sleeved inside the rotor (4) after thermal expansion.

4. A novel linear motion mechanism as claimed in claim 1, characterized in that the rotor shaft (8) is fitted with a pulley (11) for connection to an encoder.

5. A novel linear motion mechanism according to claim 1, characterized in that a lead screw nut (9) and a lead screw (10) are installed in the rotor shaft (8), and the rotor shaft (8) is connected with the lead screw nut (9) through a screw.