Rotor assembly of linear motor

Abstract

The utility model relates to the technical field of motors, in particular to a linear motor rotor assembly, which comprises a shell and an inner core formed in a cavity of the shell, a rotating contact surface is arranged on the shell, the radial section of the rotating contact surface is a circumferential surface, and a plurality of molded surfaces are arranged on the rotating contact surface of the shell. The inner core is provided with a molded surface, the molded surface is provided with connecting holes communicated with the cavity of the shell, the peripheral surface of the inner core is convexly provided with connecting parts matched with the connecting holes, the connecting parts are in one-to-one correspondence with the connecting holes, and the connecting parts are positioned in the corresponding connecting holes, so that through the design of the molded surface, the connecting parts of the molded inner core are still positioned in the motion trail of the rotating contact surface of the shell; therefore, the rotor assembly does not interfere with the rotation of the rotor, and the process that the rotor assembly needs to be manually flattened is avoided, thereby improving the production efficiency of the rotor assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a linear motor rotor assembly. Background Art

[0002] A linear motor is a transmission device that converts electrical energy directly into linear motion mechanical energy without any intermediate conversion mechanism. It can be regarded as a rotating motor cut radially and unfolded into a plane. The rotor is an important component of the linear motor.

[0003] The outer shell of the rotor of the linear motor in the prior art is a copper sleeve, the inner core is a plastic part, and the inner core is directly injection molded in the outer shell, such as Figure 4 , Figure 5 , Figure 6 As shown, during the molding process, the connection portion of the inner core easily exceeds the outer circumference of the outer shell. If not processed, the portion exceeding the outer circumference of the outer shell will affect the rotation of the rotor, so manual leveling is required. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in order to overcome the problem in the prior art that during the molding process, the connection part of the inner core is easy to protrude from the outer circumference of the outer shell. If not processed, the part protruding from the outer circumference of the outer shell will affect the rotation of the rotor, and therefore requires manual leveling, a linear motor rotor assembly is provided.

[0005] The utility model solves the technical problem by adopting a technical solution: a linear motor rotor assembly comprises a shell and an inner core formed in a cavity of the shell,

[0006] The outer shell has a rotating contact surface, the radial section of the rotating contact surface is a circumferential surface, and the rotating contact surface of the outer shell is provided with a plurality of profiles, each of which has a connection hole connected with the cavity of the outer shell.

[0007] A connecting portion matching the connecting hole is protruded on the outer circumferential surface of the inner core, and the connecting portion and the connecting hole correspond one to one. The connecting portion is located in the corresponding connecting hole. Through the design of the profile, the connecting portion of the inner core is still located in the motion trajectory of the rotating contact surface of the outer shell after molding, so that it will not interfere with the rotation of the rotor, avoiding the need for manual smoothing of the rotor assembly, thereby improving the production efficiency of the rotor assembly.

[0008] In order to solve the problem of low connection stability between the outer shell and the inner core, it further includes three connection holes, and the angle between two adjacent connection holes is 120°.

[0009] It further comprises that the motion track of the rotating contact surface of the shell is a circle, and the profile is located inside the motion track of the rotating contact surface.

[0010] The inner core further comprises a through hole for the rotating shaft to pass through.

[0011] The beneficial effect of the utility model is that the linear motor rotor assembly provided by the utility model, through the design of the profile, makes the connection part of the inner core still located within the motion trajectory of the rotating contact surface of the outer shell after molding, so that it will not interfere with the rotation of the rotor, avoiding the need for manual leveling of the rotor assembly, thereby improving the production efficiency of the rotor assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a front view structural schematic diagram of the utility model;

[0015] Figure 3 This utility model Figure 3 Schematic diagram of the cross-sectional structure at AA in the middle;

[0016] Figure 4 It is a structural schematic diagram of a rotor assembly in the prior art;

[0017] Figure 5 It is a front view structural schematic diagram of a rotor assembly in the prior art;

[0018] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure at BB in the middle.

[0019] In the figure: 1, housing, 11, rotating contact surface, 12, profile surface, 13, connecting hole;

[0020] 2. inner core, 21. connecting portion, 22. through hole. DETAILED DESCRIPTION

[0021] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0022] Embodiment 1:

[0023] like Figure 1 Schematic diagram of the structure of the utility model, a linear motor rotor assembly, including a shell 1 and an inner core 2 formed in the cavity of the shell 1,

[0024] like Figure 1 , Figure 2 , Figure 3As shown, the housing 1 has a rotating contact surface 11, the radial section of the rotating contact surface 11 is a circumferential surface, a plurality of profiles 12 are provided on the rotating contact surface 11 of the housing 1, the profiles 12 have connecting holes 13 communicating with the cavity of the housing 1, the profiles 12 are planes, the motion track of the rotating contact surface 11 of the housing 1 is a circle, the profiles 12 are located inside the motion track of the rotating contact surface 11, so that even if the connecting portion 21 of the inner core 2 protrudes from the connecting hole 13 after molding, it cannot protrude from the motion track of the rotating contact surface 11, so that the connecting portion 21 cannot interfere with the normal rotation of the rotor;

[0025] like Figure 1 , Figure 2 , Figure 3 As shown, a connecting portion 21 matching the connecting hole 13 is formed on the outer circumferential surface of the inner core 2, the connecting portion 21 corresponds to the connecting hole 13, the connecting hole 13 is a waist-shaped hole, the extending direction of the connecting hole 13 is the axial direction of the outer shell 1, the connecting portion 21 is located in the corresponding connecting hole 13, the inner core 2 has a through hole 22 for the shaft to pass through, and the upper and lower top surfaces of the inner core 2 are inwardly contracted introduction surfaces. The introduction surface is a conical structure.

[0026] like Figure 3 As shown, there are three connecting holes 13, and the angle between two adjacent connecting holes 13 is 120°, that is, three connecting parts 21 are correspondingly formed on the inner core 2, and the connecting parts 21 and the connecting holes 13 correspond one to one. The connecting parts 21 are located in the corresponding connecting holes 13. The cooperation of multiple connecting parts 21 and connecting holes 13 can enhance the structural strength of the outer shell 1 and the inner core 2.

[0027] Embodiment 2:

[0028] The technical feature that distinguishes Example 2 from Example 1 is: profile 12.

[0029] The profile surface 12 may also be an inclined surface, so that the profile surface 12 is located inside the movement track of the rotating contact surface 11 .

[0030] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A linear motor rotor assembly, characterized in that: It comprises an outer shell (1) and an inner core (2) formed in a cavity of the outer shell (1). The housing (1) has a rotating contact surface (11), the radial cross section of the rotating contact surface (11) is a circumferential surface, the rotating contact surface (11) of the housing (1) is provided with a plurality of profiles (12), the profiles (12) having connection holes (13) communicating with the cavity of the housing (1), A connecting portion (21) matching the connecting hole (13) is protruded on the outer peripheral surface of the inner core (2), the connecting portion (21) and the connecting hole (13) correspond one to one, and the connecting portion (21) is located in the corresponding connecting hole (13).

2. The linear motor rotor assembly according to claim 1, characterized in that: There are three connection holes (13), and the angle between two adjacent connection holes (13) is 120°.

3. The linear motor rotor assembly according to claim 1, characterized in that: The motion track of the rotating contact surface (11) of the housing (1) is a circle, and the profile surface (12) is located inside the motion track of the rotating contact surface (11).

4. The linear motor rotor assembly according to claim 1, characterized in that: The inner core (2) is provided with a through hole (22) for the rotating shaft to pass through.

Images