Mover assembly of linear compressor

By adopting a combined structure of the main magnetic steel ring, the secondary magnetic steel ring and the skeleton in the linear compressor motor subassembly, and improving the strength of the pin connection and adhesive bonding, the problem of insufficient strength of the driver components in the prior art is solved, and higher overall strength and stability are achieved.

CN223039740UActive Publication Date: 2025-06-27RUINA INTELLIGENT EQUIP CO LTD
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Patent Information

Application Number
CN202422209589.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-10
Publication Date
2025-06-27
Estimated Expiration
2034-09-10

AI Technical Summary

Technical Problem

The existing linear compressor subassemblies are prone to collapse when subjected to axial and radial forces due to small contact surfaces and poor overall strength.

Method used

The combined structure of the main magnetic steel ring, the secondary magnetic steel ring and the skeleton is adopted. The main magnetic steel ring and the secondary magnetic steel ring are connected through pins, and the connection is fixedly connected through epoxy adhesive to enhance the overall strength of the component.

Benefits of technology

Through the increase of pin connection and adhesive strength, the overall strength of the mover assembly is significantly enhanced, the collapse of the magnetic sheet and sheet is avoided, and the stability of the assembly is improved.

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Abstract

The utility model discloses a rotor assembly of a linear compressor, which belongs to the technical field of compressors and comprises a main magnetic steel ring, an auxiliary magnetic steel ring and a framework, two ends of the main magnetic steel ring are connected with the auxiliary magnetic steel ring through pins, the main magnetic steel ring is fixedly connected with the auxiliary magnetic steel ring, and one end, far away from the main magnetic steel ring, of the auxiliary magnetic steel ring is connected with the framework through a pin. And the auxiliary magnetic steel ring is fixedly connected with the framework. According to the utility model, the main magnetic steel ring, the auxiliary magnetic steel ring and the skeleton are connected through the pins, the bonding strength of the glue is further improved, the overall strength of the rotor assembly is enhanced, and when the rotor assembly is subjected to radial force and axial thrust of the magnetic steel, the overall magnetic steel ring does not have collapse of the magnetic steel sheets.
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Description

Technical Field

[0001] The utility model belongs to the technical field of compressors, and particularly relates to a stator assembly of a linear compressor. Background Art

[0002] In a linear compressor, a linear reciprocating driving force is generated by a magnetic field formed after the motor is powered on. The piston is driven by a stator assembly to reciprocate in the cylinder to achieve the purpose of compressing gas. The stator assembly is formed by splicing magnetic steel sheets into a magnetic steel ring structure, which is connected to the magnetic steel through a rigid skeleton, and then connected to other components of the linear compressor through the skeleton to drive the piston to move. For a moving-magnet linear compressor, the structural strength and overall weight of the stator assembly are key factors. The stator assembly is composed of magnetic sheets spliced into a ring structure and bonded by an adhesive. Due to the very small contact area, the overall strength is very poor, and it is prone to collapse under axial and radial forces.

[0003] Therefore, it is urgent to design a stator assembly of a linear compressor to solve the above-mentioned problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide a stator assembly of a linear compressor, which has the advantage of strengthening the overall strength of the stator assembly and solves the problems mentioned in the background art.

[0005] To achieve the above purpose, the specific technical solution of the stator assembly of the linear compressor of the utility model is as follows:

[0006] The stator assembly of the linear compressor includes a main magnetic steel ring, a secondary magnetic steel ring and a skeleton. Both ends of the main magnetic steel ring are connected to the secondary magnetic steel ring through pins, the main magnetic steel ring is fixedly connected to the secondary magnetic steel ring, and one end of the secondary magnetic steel ring away from the main magnetic steel ring is connected to the skeleton through a pin, and the secondary magnetic steel ring is fixedly connected to the skeleton.

[0007] Furthermore, the connection surfaces of the main magnetic steel ring and the secondary magnetic steel ring are in contact, and the connection surfaces of the secondary magnetic steel ring and the skeleton are in contact.

[0008] Furthermore, the main magnetic steel ring includes a plurality of main magnetic steel sheets, and the plurality of main magnetic steel sheets are fixedly connected to form the main magnetic steel ring.

[0009] Furthermore, the secondary magnetic steel ring includes a plurality of secondary magnetic steel sheets, and the plurality of secondary magnetic steel sheets are fixedly connected to form the secondary magnetic steel ring.

[0010] Furthermore, pin holes are provided at both ends of the main magnetic steel sheet and on the opposite surfaces of the secondary magnetic steel sheet, and the pin holes of the main magnetic steel sheet are inserted into the corresponding pin holes of the secondary magnetic steel sheet through pins.

[0011] Further, the number of pin holes at each end of the main magnetic steel sheet is at least two, and the pin holes at the end of the main magnetic steel sheet in the first direction and the pin holes at the end of the main magnetic steel sheet in the second direction are respectively connected to different sub-magnetic steel sheets through pins.

[0012] Further, the number of pin holes on the opposite surfaces of the sub-magnetic steel sheet is at least two, and the pin holes at the end of the sub-magnetic steel sheet in the first direction and the pin holes at the end of the sub-magnetic steel sheet in the second direction are respectively connected to different main magnetic steel sheets through pins.

[0013] Further, pin holes are provided on the opposite surfaces of the end of the sub-magnetic steel sheet far from the main magnetic steel sheet and the skeleton, and the pin holes of the sub-magnetic steel sheet are inserted into the corresponding pin holes of the skeleton through pins.

[0014] Further, the skeleton includes a ring frame and legs, the ring frame is fixedly connected to the legs, and a weight reduction cavity is formed between adjacent legs.

[0015] Further, the skeleton pin holes are located on the weight reduction cavity.

[0016] The utility model has the following advantages: By connecting the main magnetic steel ring, the sub-magnetic steel ring and the skeleton through pins, the bonding strength of the adhesive is further improved, and the overall strength of the mover assembly is enhanced. When subjected to the radial force and axial thrust of the magnetic steel, the overall magnetic steel ring will not have the collapse of magnetic steel sheets. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the mover assembly of the utility model;

[0018] Figure 2 is an exploded structure diagram of the mover assembly of the utility model;

[0019] Figure 3 is a schematic diagram of the structure of the main magnetic steel ring of the utility model;

[0020] Figure 4 is a schematic diagram of the structure of the sub-magnetic steel ring of the utility model;

[0021] Figure 5 is a schematic diagram of the structure of the skeleton of the utility model;

[0022] Explanation of the marks in the figure: 1. Main magnetic steel ring; 11. Main magnetic steel sheet; 2. Sub-magnetic steel ring; 21. Sub-magnetic steel sheet; 3. Skeleton; 21. Leg; 32. Ring frame; 33. Weight reduction cavity; 4. Pin. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without making creative efforts fall within the protection scope of the present utility model.

[0024] Those skilled in the art can understand that although some embodiments herein include certain features included in other embodiments rather than other features, the combination of the features of different embodiments means that it is within the scope of the present utility model and forms different embodiments. For example, in the claims, any one of the claimed embodiments can be used in any combination.

[0025] The following refers to the attached Figure 1 to the attached Figure 5 to describe the mover assembly of the linear compressor of the present utility model.

[0026] The working components of the linear compressor mainly include two parts: a motor and a compressor.

[0027] The motor part is composed of a stator and a mover. The stator is fixed on the compressor housing, and the mover group generates vibration through the electromagnetic principle. The interaction between the mover group and the stator generates a magnetic field, and then generates vibration.

[0028] Among them, the mover is the mover assembly in the present utility model.

[0029] The compressor part is mainly composed of a cylinder and a piston. The cylinder is fixed on the compressor housing, and the piston is connected to the motor mover through a connecting rod. When the motor mover generates vibration, this vibration is transmitted to the piston through the connecting rod, causing the piston to reciprocate in the cylinder. This movement realizes the compression and release of the refrigerant, thereby completing the refrigeration or heating process.

[0030] Currently, the mover assembly is composed of a plurality of magnetic pieces spliced into an annular structure and bonded by an adhesive. Since the contact surface is very small, the overall strength is very poor, and it is easy to collapse under axial force and radial force. Moreover, the weight of the skeleton for strengthening the support of the mover assembly also accounts for a large part, resulting in a large power consumption loss of the whole compressor.

[0031] Therefore, this mover assembly includes a main magnetic steel ring 1, a secondary magnetic steel ring 2 and a skeleton 3. Both ends of the main magnetic steel ring 1 are connected to the secondary magnetic steel ring 2 through pins 4, the main magnetic steel ring 1 is fixedly connected to the secondary magnetic steel ring 2, and one end of the secondary magnetic steel ring 2 away from the main magnetic steel ring 1 is connected to the skeleton 3 through a pin 4, and the secondary magnetic steel ring 2 is fixedly connected to the skeleton 3.

[0032] Regarding the fixed connection methods of the main magnet ring 1, the secondary magnet ring 2, and between the secondary magnet ring 2 and the skeleton 3, it is preferably fixed by epoxy adhesive bonding. In other embodiments of the present invention, it can also be bonded by other fixing adhesives or fixed by riveting or other fixing methods, as long as the fixed connection between the main magnet ring 1 and the secondary magnet ring 2 and the fixed connection between the secondary magnet ring 2 and the skeleton 3 can be satisfied.

[0033] The connection between the main magnet ring 1, the secondary magnet ring 2, and the skeleton 3 by the pin 4 further improves the bonding strength of the adhesive and strengthens the overall strength of the mover assembly. When subjected to the radial force and axial thrust of the magnet, the overall magnet ring will not have the collapse of magnet sheets.

[0034] Preferably, the connection surfaces of the main magnet ring 1 and the secondary magnet ring 2 are in contact, and the connection surfaces of the secondary magnet ring 2 and the skeleton 3 are in contact to further strengthen the overall strength of the mover assembly. In other embodiments of the present invention, there may also be a certain gap between the main magnet ring 1 and the secondary magnet ring 2 and between the secondary magnet ring 2 and the skeleton 3, as long as the overall strength of the mover assembly can be satisfied.

[0035] The main magnet ring 1 includes a plurality of main magnet sheets 11, and the plurality of main magnet sheets 11 are fixedly connected to form the main magnet ring 1. The secondary magnet ring 2 includes a plurality of secondary magnet sheets 21, and the plurality of secondary magnet sheets 21 are fixedly connected to form the secondary magnet ring 2.

[0036] Regarding the fixed connection methods of the plurality of main magnet sheets 11 and the plurality of secondary magnet sheets 21, it is preferably fixed by epoxy resin adhesive bonding. In other embodiments of the present invention, it can also be bonded by other adhesives such as anaerobic adhesive or magnet adhesive, as long as it can ensure that the plurality of main magnet sheets 11 are fixedly connected to form the main magnet ring 1 and the plurality of secondary magnet sheets 21 are fixedly connected to form the secondary magnet ring 2.

[0037] Pin holes are provided at both ends of the main magnet sheet 11 and on the opposite surfaces of the secondary magnet sheet 21, and the pin holes of the main magnet sheet 11 are inserted with the pin 4 through the corresponding pin holes of the secondary magnet sheet 21.

[0038] Preferably, the number of pin holes at each end of the main magnet sheet 11 is two. The pin holes at the end of the main magnet sheet 11 in the first direction and the pin holes at the end of the main magnet sheet 11 in the second direction are respectively connected to different secondary magnet sheets 21 through the pin 4, so that one main magnet sheet 11 is connected and fixed to two secondary magnet sheets 21. In other embodiments of the present invention, the number of pin holes at each end of the main magnet sheet 11 is more than two, as long as it can ensure that the pin holes at the end of the main magnet sheet 11 in the first direction and the pin holes at the end of the main magnet sheet 11 in the second direction are respectively connected to different secondary magnet sheets 21 through the pin 4.

[0039] Preferably, the number of pin holes on the opposite surfaces of the auxiliary magnet steel sheet 21 is two. The pin holes at the end of the auxiliary magnet steel sheet 21 in the first direction and the pin holes at the end of the auxiliary magnet steel sheet 21 in the second direction are respectively connected to different main magnet steel sheets 11 through pins 4, so that one auxiliary magnet steel sheet 21 is connected and fixed to two main magnet steel sheets 11. In other embodiments of the present invention, the number of pin holes on the opposite surfaces of the auxiliary magnet steel sheet 21 is more than two, as long as it can ensure that the pin holes at the end of the auxiliary magnet steel sheet 21 in the first direction and the pin holes at the end of the auxiliary magnet steel sheet 21 in the second direction are respectively connected to different main magnet steel sheets 11 through pins 4.

[0040] Preferably, the connection part of adjacent main magnet steel sheets 11 is located on the center line of the auxiliary magnet steel sheet 21, and the connection part of adjacent auxiliary magnet steel sheets 21 is located on the center line of the main magnet steel sheet 11 to strengthen the overall strength of the mover assembly. In other embodiments of the present invention, the connection part of adjacent main magnet steel sheets 11 is located at other parts of the auxiliary magnet steel sheet 21, and the connection part of adjacent auxiliary magnet steel sheets 21 is located at other parts of the main magnet steel sheet 11.

[0041] Pin holes are provided on the opposite surfaces of the end of the auxiliary magnet steel sheet 21 far from the main magnet steel sheet 11 and the skeleton 3, and the pin holes of the auxiliary magnet steel sheet 21 are inserted into the corresponding pin holes of the skeleton 3 through pins 4.

[0042] The skeleton 3 includes a ring frame 32 and legs 21. The ring frame 32 is fixedly connected to the legs 21, and a weight reduction cavity 33 is formed between adjacent legs 21. By providing the weight reduction cavity 33, the weight of the mover assembly is reduced, and the power consumption loss of the whole compressor is reduced.

[0043] Specifically, the specific number of legs 21 corresponds to the number of column springs to facilitate the connection with the column springs of the linear compressor.

[0044] Preferably, the pin holes of the skeleton 3 are located on the weight reduction cavity 33 to facilitate the connection between the skeleton 3 and the auxiliary magnet steel ring 2. In other embodiments of the present invention, the pin holes of the skeleton 3 can also be located at other parts.

[0045] When assembling the mover assembly, the following steps are included:

[0046] S1. Predrill pin holes on the main magnet steel sheet 11, the auxiliary magnet steel sheet 21 and the skeleton 3;

[0047] S2. Design a magnet shaping tooling, place and splice the main magnet steel sheets 11 one by one along the shaping tooling to form the main magnet ring 1, then fixedly bond the main magnet steel sheets 11. Subsequently, place and splice the auxiliary magnet steel sheets 21 one by one along the shaping tooling to form the auxiliary magnet ring 2, and then fixedly bond the auxiliary magnet steel sheets 21.

[0048] S3. Insert the pin 4 into the pin holes at both ends of the main magnet ring 1, and one end of the pin 4 extends out of the end of the main magnet ring 1. Bond the pin 4 and the pin holes of the main magnet ring 1.

[0049] S4. Align the pin holes on the end face of the secondary magnet ring 2 with the pin 4 of the main magnet ring 1, perform an overall end face fitting connection, and bond the pin 4 and the pin holes of the secondary magnet ring 2.

[0050] S5. Insert the pin hole at one end of the secondary magnet ring 2 away from the main magnet ring 1 into the pin 4, and bond the pin 4 and the pin holes of the secondary magnet ring 2.

[0051] S6. Align the pin holes of the skeleton 3 with the pin 4 of the secondary magnet ring 2, perform an overall end face fitting connection, and bond the pin 4 and the pin holes of the skeleton 3.

[0052] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A linear compressor mover assembly, characterized in that: It includes a main magnetic steel ring, a secondary magnetic steel ring and a frame. Both ends of the main magnetic steel ring are connected to the secondary magnetic steel ring through pins, the main magnetic steel ring and the secondary magnetic steel ring are fixedly connected, and the end of the secondary magnetic steel ring away from the main magnetic steel ring is connected to the frame through a pin, and the secondary magnetic steel ring is fixedly connected to the frame.

2. The linear compressor mover assembly according to claim 1, characterized in that: The connecting surfaces of the main magnetic steel ring and the auxiliary magnetic steel ring are in contact with each other, and the connecting surfaces of the auxiliary magnetic steel ring and the frame are in contact with each other.

3. The linear compressor mover assembly according to claim 1, characterized in that: The main magnetic steel ring includes a plurality of main magnetic steel sheets, and the plurality of main magnetic steel sheets are fixedly connected to form the main magnetic steel ring.

4. The linear compressor mover assembly according to claim 1, characterized in that: The auxiliary magnetic steel ring includes a plurality of auxiliary magnetic steel sheets, and the plurality of auxiliary magnetic steel sheets are fixedly connected to form the auxiliary magnetic steel ring.

5. The linear compressor mover assembly according to claim 3 or 4, characterized in that: Both ends of the main magnetic steel sheet and the opposite surface of the auxiliary magnetic steel sheet are provided with pin holes, and the pin holes of the main magnetic steel sheet and the corresponding pin holes of the auxiliary magnetic steel sheet are plugged in through pins.

6. The linear compressor mover assembly according to claim 5, characterized in that: There are at least two pin holes at each end of the main magnetic steel sheet, and the pin holes at the first direction end of the main magnetic steel sheet and the pin holes at the second direction end of the main magnetic steel sheet are respectively connected to different auxiliary magnetic steel sheets through pins.

7. The linear compressor mover assembly according to claim 5, characterized in that: There are at least two pin holes on the opposite sides of the auxiliary magnetic steel sheet, and the pin holes at the first direction end of the auxiliary magnetic steel sheet and the pin holes at the second direction end of the auxiliary magnetic steel sheet are respectively connected to different main magnetic steel sheets through pins.

8. The linear compressor mover assembly according to claim 4, characterized in that: Pin holes are provided at one end of the auxiliary magnetic steel sheet away from the main magnetic steel sheet and at the opposite surface of the frame. The pin holes of the auxiliary magnetic steel sheet are plugged with corresponding pin holes of the frame through pins.

9. The linear compressor mover assembly according to claim 1, characterized in that: The frame comprises a ring frame and supporting legs, the ring frame is fixedly connected to the supporting legs, and a weight-reducing cavity is formed between adjacent supporting legs.

10. The linear compressor mover assembly according to claim 8 or 9, characterized in that: The frame pin holes are located on the weight reduction cavity.