CN216721100U

CN216721100U - Motor with linear transmission mechanism

Info

Publication number: CN216721100U
Application number: CN202122736472.1U
Authority: CN
Inventors: 张栋; 袁贵星; 樊良彬
Original assignee: Shanghai Mingzhi Paibosi Automation Technology Co ltd
Current assignee: Shanghai Mingzhi Paibosi Automation Technology Co ltd
Priority date: 2021-11-09
Filing date: 2021-11-09
Publication date: 2022-06-10
Anticipated expiration: 2031-11-09

Abstract

The utility model relates to a motor with a linear transmission mechanism, which comprises a motor body (5), a motor rotor shaft (1), a bearing (2) and a connecting piece (3), wherein one end of the motor rotor shaft (1) is arranged in the motor body (5), the other end of the motor rotor shaft is provided with an interface matched with the connecting piece (3), and the bearing (2) is arranged between the motor rotor shaft (1) and the connecting piece (3). Compared with the prior art, the utility model has the advantages of optimized cost, flexible collocation, convenient installation, stable structure and the like.

Description

Motor with linear transmission mechanism

Technical Field

The utility model relates to a motor, in particular to a motor with a linear transmission mechanism.

Background

The microminiature linear stepping motor is used as a basic power unit, and has great use requirements in various linear motion control fields. The structure can also be divided into an external nut type and an internal nut type.

The built-in nut type can save not only the space of one nut but also the space required by the installation of part of the motor for a user because the nut is positioned inside the rotor of the motor.

Along with the current industrial development, the high precision and multifunction are gradually developed. The encoder and the encoder work cooperatively to form closed-loop control; or increasing demand for adding some functional structures.

Different from a conventional external nut type motor, the installation of an encoder or other accessories is realized by only prolonging the rotor shaft of the motor, and only the material breaking length during shaft processing is influenced.

However, most of the motors penetrate through the interior of the motor and are all plastic nuts, and the manufacturing process comprises an injection molding process; for the rotor shaft needing injection molding, the length and the external dimension of the rotor shaft are strictly limited by a mold; the shape cannot be extended or changed freely.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a motor with a linear transmission mechanism to overcome the above-mentioned drawbacks of the prior art.

The purpose of the utility model can be realized by the following technical scheme:

according to one aspect of the utility model, the motor with the linear transmission mechanism comprises a motor body, a motor rotor shaft, a bearing and a connecting piece, wherein one end of the motor rotor shaft is arranged in the motor body, the other end of the motor rotor shaft is provided with an interface matched with the connecting piece, and the bearing is arranged between the motor rotor shaft and the connecting piece.

The connector is a groove (7), and a boss (6) matched with the groove (7) is arranged on the connecting piece (3);

or the interface is an internal thread (8), and an external thread (9) matched with the internal thread (8) is arranged on the connecting piece (3);

or the matching mode of the interface is welding.

As a preferable technical scheme, the length L1 of the boss is matched with the depth L2 of the groove, and the width W1 of the boss is matched with the width W2 of the groove; the lug boss is fixedly connected with the groove through glue.

Preferably, the ratio of the width W2 of the groove to the outer circle diameter D2 of the end part of the motor rotor shaft is K1 ═ W2: d2; wherein K1 is more than 0.30 and less than 0.50.

As a preferred technical solution, said K1 further comprises: k1 is more than 0.35 and less than 0.45.

Preferably, the boss is a partial cylinder surrounded by a length L1 and a width W1, and the outer surface area of the partial cylinder is larger than the outer surface area of the boss

In the formula: w1 is the width of the boss; d2 is the diameter D2 of the outer circle of the end part of the motor rotor shaft; l2 is the depth of the groove; wherein S is more than or equal to 5mm²。

Preferably, the ratio of the depth L2 of the groove to the diameter D2 of the outer circle of the end part of the motor rotor shaft is K2-L2: d2, wherein 0.35 < K2 < 0.65.

As a preferred technical solution, said K2 further comprises: k2 is more than 0.4 and less than 0.5.

As a preferable technical solution, the ratio of the depth L2 of the groove to the bearing adapting section L3 is K3 to L2: l3, wherein 0.30 < K3 < 0.80.

As a preferred technical solution, said K3 further comprises: k3 is more than 0.5 and less than 0.6.

Preferably, the difference δ 1 between the width W1 of the boss and the width W2 of the groove is W2-W1, wherein 0.01mm < δ 1<0.08 mm.

As a preferred technical solution, δ 1 further is: 0.015mm < δ 1<0.03 mm.

As a preferable technical scheme, the bearing is matched with the boss, the inner diameter D3 of the bearing is matched with the outer diameter D1 of the boss, and the bearing is fixedly connected through glue.

Preferably, the difference δ 2 between the inner diameter D3 of the bearing and the outer diameter D1 of the boss is D3-D1, wherein 0.003mm < δ 2<0.025 mm.

As a preferred technical solution, δ 2 further is: 0.005mm < δ 2<0.012 mm.

Compared with the prior art, the utility model has the advantages of optimized cost, flexible collocation, convenient installation, stable structure and the like.

Drawings

FIG. 1 is a schematic structural view of example 1 of the present invention;

FIG. 2(a) is a front view of a connector according to embodiment 1 of the present invention;

FIG. 2(b) is a bottom view of the coupling member according to embodiment 1 of the present invention;

FIG. 2(c) a left side view of a connector according to embodiment 1 of the present invention;

fig. 3 is a schematic structural view of a rotor shaft of a motor according to embodiment 1 of the present invention;

FIG. 4 is a schematic view of a bearing structure according to embodiment 1 of the present invention;

FIG. 5 is a schematic view of the overall structure of embodiment 1 of the present invention;

FIG. 6 is a schematic side view of embodiment 1 of the present invention;

FIG. 7 is a schematic half-sectional view showing example 1 of the present invention;

FIG. 8 is a schematic structural view of example 2 of the present invention;

FIG. 9 is a schematic diagram of an encoder of the present invention;

FIG. 10 is a schematic view of the structure of the present invention used with a hand wheel;

FIG. 11 is a schematic view of the present invention in use with other mechanical structures;

FIG. 12 is a graph of the curing strength, speed and bond gap of the present invention.

Wherein 1 is the motor rotor shaft, 2 is the bearing, 3 is the connecting piece, 5 is the motor body, 6 is the boss, 7 is the recess, 8 is the internal thread, 9 is the external screw thread.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of protection of the present invention.

Example 1

As shown in fig. 1-7, a motor with a linear transmission mechanism comprises a motor body 5, a motor rotor shaft 1, a bearing 2 and a connecting piece 3, wherein one end of the motor rotor shaft 1 is installed in the motor body 5, the other end of the motor rotor shaft is provided with an interface matched with the connecting piece 3, and the bearing 2 is arranged between the motor rotor shaft 1 and the connecting piece 3. Therefore, the utility model can prolong or adjust the appearance of the rotating shaft on the premise of not changing the injection mold, and realize the installation of accessories with different functions.

As shown in fig. 2-3, the interface is a groove 7, and the connecting member 3 is provided with a boss 6 which is matched with the groove 7. The length L1 of the boss 6 is matched with the depth L2 of the groove 7, and the width W1 of the boss 6 is matched with the width W2 of the groove 7; the boss 6 is fixedly connected with the groove 7 through glue.

The ratio of the width W2 of the groove 7 to the diameter D2 of the end part outer circle of the motor rotor shaft 1 is W2 as K1: d2; wherein K1 is more than 0.30 and less than 0.50. More preferably, K1 is: k1 is more than 0.35 and less than 0.45.

The boss 6 is a partial cylinder surrounded by a length L1 and a width W1, and the outer surface area of the partial cylinder

In the formula: w1 is the width of boss 6; d2 is the diameter D2 of the outer circle of the end part of the motor rotor shaft 1; l2 is the depth of groove 7; wherein S is more than or equal to 5mm²。

The ratio of the depth L2 of the groove 7 to the diameter D2 of the end part outer circle of the motor rotor shaft 1 is L2 as K2: d2, wherein 0.35 < K2 < 0.65. More preferably, K2 is: k2 is more than 0.4 and less than 0.5.

The ratio of the depth L2 of the groove 7 to the L3 of the adaptive section of the bearing 2 is K3-L2: l3, wherein 0.30 < K3 < 0.80. More preferably, K3 is: k3 is more than 0.5 and less than 0.6.

The difference delta 1 between the width W1 of the boss 6 and the width W2 of the groove 7 is W2-W1, wherein 0.01mm < delta 1<0.08 mm. More preferably, δ 1 is: 0.015mm < δ 1<0.03 mm.

As shown in fig. 2 and 4, the bearing 2 is fitted with the boss 6, and the inner diameter D3 of the bearing 2 is matched with the outer diameter D1 of the boss 6 and is fixedly connected by glue.

The difference delta 2 between the inner diameter D3 of the bearing 2 and the outer diameter D1 of the boss 6 is D3-D1, wherein 0.003mm < delta 2<0.025 mm. More preferably, δ 2 is: 0.005mm < δ 2<0.012 mm.

Compared with the traditional scheme, the utility model has the following advantages:

1. and optimizing the cost.

When the traditional scheme is used for prolonging or adjusting the size of the output shaft, the size of the metal insert needs to be adjusted.

But the size of the metal insert in turn directly affects the cavity size of the mold. Multiple sets of molds need to be configured.

If the design of multiple types of core rods meets the flexibility, the service life of the die is shortened, and the debugging time is prolonged.

2. Flexible collocation

As shown in fig. 9-11, the present invention can flexibly adjust the product by adjusting the size of the connecting member without adjusting the mold, so as to meet different use requirements.

3. The installation is convenient.

According to the utility model, by designing the matching positioning structure on the part, the product assembly can be realized through a simple tool. The accuracy requirement of the encoder or other matching parts can be met.

4. The structure is stable.

When the interface is designed into a boss and a groove, the volume of the glue and the bonding gap can be in an ideal range through reasonable size design. The adhesive property of the glue is maximized. As shown in fig. 12.

When the interface is designed into the internal thread and the external thread, the interface can be ensured to be firm through the pretightening force and the thread glue of the thread.

The loosening condition is avoided when the functional piece is subsequently adapted.

Example 2

As shown in fig. 8, the interface is an internal thread 8, and the connecting member is provided with an external thread 9 matched with the internal thread 8.

Example 3

The matching mode of the interface is welding.

While the utility model has been described with reference to specific embodiments, the utility model is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the utility model. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a take linear transmission mechanism's motor, its characterized in that includes motor body (5), electric motor rotor axle (1), bearing (2) and connecting piece (3), electric motor rotor axle (1) one end pack into motor body (5), the other end be equipped with connecting piece (3) complex interface, bearing (2) establish between electric motor rotor axle (1) and connecting piece (3).

2. The motor with the linear transmission mechanism according to claim 1, wherein the interface is a groove (7), and the connecting piece (3) is provided with a boss (6) matched with the groove (7);

or the matching mode of the interface is welding.

3. A machine with a linear actuator according to claim 2, characterized in that the length L1 of the boss (6) is adapted to the depth L2 of the groove (7), and the width W1 of the boss (6) is adapted to the width W2 of the groove (7); the boss (6) is fixedly connected with the groove (7) through glue.

4. A motor with a linear transmission according to claim 2, characterized in that the ratio of the width W2 of the groove (7) to the outer diameter D2 of the end of the motor rotor shaft (1) is K1 ═ W2: d2; wherein K1 is more than 0.30 and less than 0.50.

5. A motor with a linear transmission mechanism as claimed in claim 4, wherein said K1 is further: k1 is more than 0.35 and less than 0.45.

6. A machine with a linear actuator according to claim 3, characterized in that the said boss (6) is a part of a cylinder enclosed by a length L1 and a width W1, the outer surface area of which is of a cylinder shape

In the formula: w1 is the width of the boss (6); d2 is the diameter D2 of the outer circle of the end part of the motor rotor shaft (1); l2 is the depth of the groove (7); wherein S is more than or equal to 5mm²。

7. A motor with a linear transmission according to claim 3, characterized in that the ratio of the depth L2 of the groove (7) to the outer diameter D2 of the end of the motor rotor shaft (1) is K2-L2: d2, wherein 0.35 < K2 < 0.65.

8. The motor with linear transmission mechanism of claim 7, wherein said K2 is further: k2 is more than 0.4 and less than 0.5.

9. A machine with a linear transmission according to claim 3, characterized in that the ratio of the depth L2 of the groove (7) to the L3 of the bearing (2) is K3-L2: l3, wherein 0.30 < K3 < 0.80.

10. A motor with a linear actuator as claimed in claim 9, wherein said K3 is further: k3 is more than 0.5 and less than 0.6.

11. A machine with a linear actuator according to claim 3, characterised in that the difference δ 1 between the width W1 of the boss (6) and the width W2 of the recess (7) is W2-W1, where 0.01mm < δ 1<0.08 mm.

12. A motor with a linear actuator as claimed in claim 11, wherein δ 1 further is: 0.015mm < δ 1<0.03 mm.

13. A motor with a linear transmission mechanism according to claim 2, characterized in that the bearing (2) is fitted with the boss (6), and the inner diameter D3 of the bearing (2) is matched with the outer diameter D1 of the boss (6) and is fixedly connected by glue.

14. A machine with a linear actuator according to claim 13, characterized in that the difference δ 2 between the inner diameter D3 of the bearing (2) and the outer diameter D1 of the boss (6) is D3-D1, where 0.003mm < δ 2<0.025 mm.

15. A motor with a linear actuator as claimed in claim 14, wherein δ 2 is further defined by: 0.005mm < δ 2<0.012 mm.