Temperature shock resistant linear motor stator module and manufacturing method thereof

Abstract

The invention discloses a linear motor stator module resistant to temperature shock and a manufacturing method thereof.The linear motor stator module resistant to temperature shock comprises a stator assembly and a shell assembly, the stator assembly comprises an iron core, a winding, a reinforcing rib and a wiring terminal, the shell assembly comprises a cover plate and a shell, and the shell is internally provided with a containing space for containing the stator assembly; the cover plate is provided with through holes for the reinforcing ribs and the wiring terminals to penetrate through. The cover plate is buckled on the shell so as to seal and position the stator assembly in the shell assembly; sealing structures are arranged at the buckling position of the cover plate and the shell and between the reinforcing ribs and the penetrating through holes and between the wiring terminals and the penetrating through holes. According to the linear motor stator module, the stator assembly is installed in the shell assembly for sealing and insulating protection, and sealing and insulating treatment of traditional potting colloid is replaced. The stator module of the linear motor has the advantages of good sealing performance, good temperature impact resistance and simple process, is beneficial to reducing the mass of the stator module of the linear motor and reducing the cost, and has remarkable advantages in application occasions with wide use temperature range of the motor.

Description

Technical Field

[0001] The invention belongs to the technical field of linear motors, and in particular relates to a linear motor stator module resistant to temperature shock and a manufacturing method thereof. Background Art

[0002] A linear motor is a motor that converts electrical energy directly into mechanical energy of linear motion. It is widely used in machine tools, conveying equipment, aerospace, rail transportation and other fields. The stator module of a linear motor is an important component of the linear motor, and its performance directly affects the efficiency and stability of the motor.

[0003] In practical applications, linear motor stator modules are often affected by temperature shock. Temperature shock refers to the phenomenon that the ambient temperature changes dramatically in a short period of time. This change will have an adverse effect on the material and structure of the stator module, thereby affecting the normal operation of the motor. Specifically, temperature shock may cause the material of the stator module to expand or contract, causing structural deformation, cracks or even fractures. This will not only reduce the working efficiency of the motor, but may also cause serious mechanical failures.

[0004] Traditional linear motor stator modules usually use linear motor stators with windings fixed by potting glue. Under environmental conditions with a wide operating temperature range of the motor and temperature shock, the linear motor stators with windings fixed by potting are prone to potting colloid cracking, resulting in poor resistance to temperature shock, affecting the insulation, waterproof and other properties of the motor, and thus affecting product reliability. Summary of the invention

[0005] In view of the problems existing in the prior art, an object of the present invention is to provide a linear motor stator module having a wide applicable temperature range and being resistant to temperature shocks, and a manufacturing method thereof.

[0006] To achieve the above-mentioned objectives, the first aspect of the present invention provides a temperature shock-resistant linear motor stator module, comprising a stator assembly and a shell assembly, wherein the stator assembly comprises an iron core, a winding, a reinforcing rib and a terminal, and the shell assembly comprises a cover plate and a shell, wherein the shell has a accommodating space for arranging the stator assembly, and the cover plate is provided with through holes for the reinforcing rib and the terminal to pass through; the cover plate is buckled on the shell to seal and position the stator assembly in the shell assembly; wherein a sealing structure is provided at the buckling position between the cover plate and the shell, and between the reinforcing rib and the terminal and the through holes.

[0007] Furthermore, the sealing structure includes a sealing ring and a sealant. The sealing ring is mounted on the reinforcing rib, and the sealant is arranged between the cover plate and the reinforcing rib to seal the reinforcing rib and the cover plate.

[0008] Furthermore, the sealing structure comprises a sealing ring and a sealing adhesive. The sealing ring is sleeved on the wiring terminal, and the sealing adhesive is provided between the cover plate and the wiring terminal to seal the wiring terminal and the cover plate.

[0009] Furthermore, the sealing structure includes a sealing ring and a sealing glue, and the sealing ring and the sealing glue are arranged at the buckling position between the cover plate and the shell.

[0010] Furthermore, a plurality of positioning bars are arranged inside the shell, and the plurality of positioning bars are arranged at intervals along the winding arrangement direction of the stator assembly to position the position of the winding wound on the iron core.

[0011] Furthermore, the shell assembly has a thickness of 0.2 mm to 0.5 mm.

[0012] Furthermore, the shell and the cover plate are provided with glue injection holes, and the shell assembly and the stator assembly are potted into one by injecting potting glue into the glue injection holes.

[0013] Furthermore, the stator module also includes a pressure plate and a positioning structure, the reinforcement rib is provided with a positioning groove arranged in the vertical direction, and the iron core is provided with a protrusion that cooperates with the positioning groove. The iron core and the reinforcement rib are positioned and fixed by pressing the protrusion of the iron core into the positioning groove, and the pressure plate is pressed into the top and bottom of the iron core to position and fix the iron core in the up and down directions.

[0014] Furthermore, the iron core is formed by stacking silicon steel sheets with a toothless structure.

[0015] A second aspect of the present invention provides a method for manufacturing the above-mentioned linear motor stator module, comprising the following steps:

[0016] Install sealing rings on the connection terminals and reinforcing ribs of the stator assembly and the sealing grooves at the buckling positions of the housing;

[0017] After installing the stator assembly into the housing, snap the cover plate onto the housing;

[0018] Sealant is provided between the cover plate and the reinforcing rib, between the cover plate and the wiring terminal, and between the cover plate and the housing;

[0019] Insert the fasteners into the housing, stator assembly and cover plate to secure them.

[0020] The linear motor stator module of the present invention installs the stator assembly into the housing assembly for sealing and insulation protection, replacing the sealing and insulation treatment of the traditional potting colloid. It has the advantages of good sealing, good temperature shock resistance and simple process, which is conducive to reducing the weight and cost of the linear motor stator module and has significant advantages in applications where the motor has a wide temperature range.

[0021] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 It is a structural schematic diagram of a linear motor stator module according to an embodiment of the present invention;

[0024] Figure 2 for Figure 1 Exploded diagram of a linear motor stator module;

[0025] Figure 3 for Figure 1 A cross-sectional schematic diagram of a linear motor stator module;

[0026] Figure 4 It is a structural schematic diagram of a stator assembly according to an embodiment of the present invention;

[0027] Figure 5 It is a schematic diagram of the core structure of a stator assembly according to an embodiment of the present invention;

[0028] Figure 6 A schematic diagram of a sealing structure according to an embodiment of the present invention;

[0029] Figure 7 This is a schematic structural diagram of a positioning bar disposed in a housing according to an embodiment of the present invention;

[0030] Figure 8 A schematic diagram of the distribution of fixing holes on the back of a stator assembly according to an embodiment of the present invention;

[0031] Fig. 9 This is a schematic diagram of the installation and fixation of a stator assembly in a housing according to an embodiment of the present invention;

[0032] Fig.10 Schematic diagram of a glue injection hole on a shell component according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that the present invention will be more comprehensive and complete and fully convey the concept of the example embodiments to those skilled in the art.

[0034] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, or it can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] The terms "top", "bottom", "above", "lower", and "on", "left-right", and "upper-lower" used throughout the description are relative to the relative positions of components of a device, such as the relative positions of the top and bottom substrates within a device. It is understood that devices are multifunctional regardless of their orientation in space.

[0036] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implying the number of technical features indicated. Thus, the defined "first" and "second" features may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0037] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0038] like Figure 1 and 2 As shown, the temperature shock resistant linear motor stator module of the present invention comprises a stator assembly 1 and a housing assembly 2, wherein the stator assembly 1 comprises an iron core 11, a winding 12, a reinforcing rib 13 and a terminal 14, and the housing assembly 2 comprises a cover plate 21 and a housing 22, wherein the housing 22 has a storage space for arranging the stator assembly 1, and the cover plate 21 is provided with through holes 23 and 24 for the reinforcing rib 13 and the terminal 14 to pass through; the cover plate 21 is buckled on the housing 22 to seal and position the stator assembly 1 in the housing assembly 2; wherein a sealing structure is provided between the buckling position of the cover plate 21 and the housing 22, and between the reinforcing rib 13 and the terminal 14 and the through holes 23 and 24. The stator assembly 1 is accommodated in the housing assembly 2 and is sealed by the sealing structure, so that the stator assembly 1 is effectively protected, and moisture absorption and insulation problems caused by cracking of the potting colloid during temperature shock are avoided, and the stator assembly 1 has the advantages of good sealing, wide operating temperature range, and temperature shock resistance.

[0039] like Figure 3-Figure 5As shown, the core 11 of the stator assembly 1 is formed by stacking a plurality of silicon steel sheets, and the reinforcing rib 13 is provided with a dovetail groove arranged in the vertical direction, and the silicon steel sheet is provided with a protrusion matched with the dovetail groove. The silicon steel sheet and the reinforcing rib 13 are positioned and fixed by pressing the protrusion of the silicon steel sheet into the dovetail groove, and the pressing plate 15 is pressed into the top and bottom of the silicon steel sheet to position and fix the silicon steel sheet in the up and down directions. The stacking coefficient of the stator core is ensured by pressing the upper and lower pressing plates 15, and the upper and lower pressing plates 15 and the reinforcing rib 13 can be fixed by welding. A positioning structure 16 is also provided on the other side of the core 11, and the positioning structure 16 is used to limit the relative position of each coil in the winding when the winding is sleeved on the core 11. The positioning structure 16 includes a row of positioning teeth on the upper side and a row of positioning teeth on the lower side of the core side, which are positioned and installed after the winding 12 is loaded into the core 11. As shown in the figure, in this embodiment, the upper row of positioning teeth are arranged in a plurality of open slots spaced apart on the upper pressing plate 15, and the lower row of positioning teeth are arranged in a plurality of open slots spaced apart on the lower pressing plate 15. After the winding 12 is inserted into the iron core 11 and positioned by the positioning structure 16, it is potted as a whole by potting glue. It should be noted that in this embodiment, the positioning structure of the winding is arranged on the iron core, and the tooth slot positioning structure of the winding may not be arranged on the iron core, and the positioning structure is arranged on the inner side of the shell, and this scheme will be described in detail later.

[0040] In one embodiment of the present invention, Figure 6 As shown, the sealing structure includes a sealing ring and a sealant. A sealing ring 131 is mounted on the reinforcing rib 13, and a sealant 132 is provided between the cover plate 21 and the reinforcing rib 13 to seal the reinforcing rib 13 and the cover plate 21. A sealing ring 141 is mounted on the wiring terminal 14, and a sealant 142 is provided between the cover plate 21 and the wiring terminal 14 to seal the wiring terminal 14 and the cover plate 21. A sealing ring 25 and a sealant 26 are provided at the buckling position of the cover plate 21 and the housing 22. Since the reinforcing rib 13 and the wiring terminal 14 need to be exposed outside the housing assembly 2 through the through holes 23 and 24 during assembly, there is a gap between the reinforcing rib 13 and the wiring terminal 14 and the housing assembly 2, and there is also a gap at the buckling position between the cover plate 21 and the housing 22. For safety reasons, these positions need to be sealed and waterproofed.

[0041] In one embodiment of the present invention, Figure 3 and Figure 7As shown, a plurality of positioning bars 221 are provided inside the housing 22, and the plurality of positioning bars 221 are arranged at intervals along the arrangement direction of the winding 12 of the stator assembly 1 to position the position of the winding 12 wound on the iron core 11. The winding positioning structure on the iron core in the above embodiment can be omitted by providing the positioning structure of the winding 12 inside the housing 22, which can effectively reduce the stator core loss and completely eliminate the influence of the cogging torque.

[0042] In one embodiment of the present invention, the thickness of the shell 22 component 2 can be set to 0.2mm to 0.5mm. Since the linear motor stator module needs to be connected in series in multiple groups along the length direction in actual application, in order to ensure the continuity of the magnetic circuit, the shell component 2 is required to occupy as little size as possible in the length direction. Therefore, the shell component 2 is set to a thin-walled shell with a small thickness, and the cover plate 21 and the shell 22 are arranged on the inner side of the shell 22, which can effectively avoid the shell sealing ring 25 and the sealant 26 from occupying the outer side of the entire linear motor stator module, especially in the length direction.

[0043] In one embodiment of the present invention, the housing 22 and the cover plate 21 are provided with injection holes 222 and 212, and the housing assembly 2 and the stator assembly 1 are potted as one by injecting potting glue into the injection holes 222 and 212. The positions of the injection holes in this embodiment are only for illustration, and can be set at different positions according to process requirements, or can be cured and sealed after potting.

[0044] like Figure 8 and 9 As shown, a mounting hole 151 can be set on the pressure plate 15 of the stator assembly 1, and a mounting hole 223 corresponding to the hole position of the mounting hole 151 can be set on the outer side of the shell 22. Fasteners such as screws, bolts, etc. can be inserted into the mounting holes 151 and 223 to fasten and fix the stator assembly 1 in the shell assembly 2.

[0045] The method for manufacturing a linear motor stator module of the present invention comprises the following steps:

[0046] Install sealing rings on the connection terminals and reinforcing ribs of the stator assembly and the sealing grooves at the buckling positions of the housing;

[0047] After installing the stator assembly into the housing, snap the cover plate onto the housing;

[0048] Sealant is provided between the cover plate and the reinforcing rib, between the cover plate and the wiring terminal, and between the cover plate and the housing;

[0049] Insert the fasteners into the housing, stator assembly and cover plate to secure them.

[0050] In summary, the linear motor stator module of the present invention installs the stator assembly into the housing assembly for sealing and insulation protection, replacing the sealing and insulation treatment of the traditional potting colloid. It has the advantages of good sealing, good temperature shock resistance, and simple process, which is conducive to reducing the mass and cost of the linear motor stator module, and has significant advantages in applications where the motor has a wide temperature range.

[0051] Those skilled in the art will readily appreciate other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. This application is intended to cover any variations, uses or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art that are not disclosed by the present invention. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present invention are indicated by the following claims.

[0052] It should be understood that the present invention is not limited to the exact construction that has been described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A linear motor stator module resistant to temperature shock, characterized in that: The invention comprises a stator assembly and a shell assembly, wherein the stator assembly comprises an iron core, a winding, a reinforcing rib and a terminal, and the shell assembly comprises a cover plate and a shell, wherein the shell has a storage space for arranging the stator assembly, and the cover plate is provided with through holes for the reinforcing rib and the terminal to pass through; the cover plate is buckled on the shell to seal and position the stator assembly in the shell assembly; wherein a sealing structure is provided at the buckling position between the cover plate and the shell, and between the reinforcing rib and the terminal and the through holes.

2. The linear motor stator module according to claim 1, characterized in that: The sealing structure comprises a sealing ring and a sealing adhesive. The sealing ring is sleeved on the reinforcing rib, and the sealing adhesive is arranged between the cover plate and the reinforcing rib to seal the reinforcing rib and the cover plate.

3. The linear motor stator module according to claim 1, characterized in that: The sealing structure comprises a sealing ring and a sealing adhesive. The sealing ring is sleeved on the wiring terminal, and the sealing adhesive is arranged between the cover plate and the wiring terminal to seal the wiring terminal and the cover plate.

4. The linear motor stator module according to claim 1, characterized in that: The sealing structure comprises a sealing ring and a sealing adhesive, and the sealing ring and the sealing adhesive are arranged at the buckling position between the cover plate and the shell.

5. The linear motor stator module according to claim 1, characterized in that: A plurality of positioning bars are arranged inside the shell, and the plurality of positioning bars are arranged at intervals along the winding arrangement direction of the stator assembly to position the position of the winding wound on the iron core.

6. The linear motor stator module according to claim 1, characterized in that: The thickness of the shell component is 0.2 mm to 0.5 mm.

7. The linear motor stator module according to claim 1, characterized in that: The shell and the cover plate are provided with glue injection holes, and the shell assembly and the stator assembly are potted into one by injecting potting glue into the glue injection holes.

8. The linear motor stator module according to claim 1, characterized in that: The stator module also includes a pressure plate and a positioning structure. The reinforcing rib is provided with a positioning groove arranged in the vertical direction, and the iron core is provided with a protrusion that cooperates with the positioning groove. The iron core and the reinforcing rib are positioned and fixed by pressing the protrusion of the iron core into the positioning groove, and the pressure plate is pressed into the top and bottom of the iron core to position and fix the iron core in the up and down directions.

9. The linear motor stator module according to claim 5, characterized in that: The iron core is formed by stacking silicon steel sheets with a toothless structure.

10. A method for manufacturing a linear motor stator module according to any one of claims 1 to 9, characterized in that: The steps include: Install sealing rings on the connection terminals and reinforcing ribs of the stator assembly and the sealing grooves at the buckling positions of the housing; After installing the stator assembly into the housing, snap the cover plate onto the housing; Sealant is provided between the cover plate and the reinforcing rib, between the cover plate and the wiring terminal, and between the cover plate and the housing; Insert the fasteners into the housing, stator assembly and cover plate to secure them.

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