Mover offset amount adjusting device, linear motor, and linear compressor

Abstract

The present disclosure relates to the technical field of compressors, and specifically discloses a mover offset adjustment device, a linear motor and a linear compressor. The mover offset adjustment device comprises an adjustment disc fixed on one side of a mover away from a coil bracket, a plate spring assembly is sleeved on the mover, the plate spring assembly is located between the adjustment disc and the coil bracket, a top piece is arranged between the adjustment disc and the plate spring assembly, and one end of the top piece can move along the axial direction of the top piece to change the angle of the adjustment disc relative to the plate spring assembly. The device can fix the adjustment disc coaxially on the mover, and then adjust the relative angle between the adjustment disc and the plate spring assembly by using the top piece on the adjustment disc, so that the axis of the mover is deflected by the adjustment disc, and the effect of adjusting the offset of the mover is achieved. Through the arrangement of the device, the service life of the linear compressor can be improved, and the maintenance cost in the later period can be reduced.

Description

Technical Field

[0001] This disclosure relates to the field of compressor technology, and more particularly to a mover offset adjustment device, a linear motor, and a linear compressor. Background Technology

[0002] Linear compressors are piston compressors that utilize linear motors. They have advantages such as compact structure, light weight, oil-free or low-lubricating oil operation, and excellent variable capacity characteristics. As a result, they are being used more and more widely and have become a major development direction for high-efficiency compressors in small refrigeration units.

[0003] A linear motor consists of a stator and a mover, with the mover performing linear reciprocating motion along the axial direction. The moving-magnet linear oscillating motor, a typical example of this type of linear motor, has a magnetic circuit structure where magnetic material is installed on the circumference of the excitation coil, forming a cylindrical air gap concentric with the excitation coil. The air gap is formed by inner and outer cylindrical stators, and radially magnetized cylindrical permanent magnets reciprocate within this air gap. Due to its optimized magnetic circuit structure and low magnetic circuit losses, this type of linear motor is widely used as a driver for linear compressors. A leaf spring assembly is installed between the cylinder and piston of the linear compressor, using oil lubrication to achieve the reciprocating motion of the piston within the cylinder.

[0004] However, when the mover offset error is large, the piston and cylinder will rub against each other during the reciprocating motion of the mover. This will not only cause air leakage, but also damage the piston and cylinder, reducing the service life of the entire linear compressor and increasing the maintenance cost later. Summary of the Invention

[0005] To address the technical problem that a large mover offset error can affect the service life and maintenance costs of a linear compressor, this disclosure provides a mover offset adjustment device, a linear motor, and a linear compressor.

[0006] In a first aspect, this disclosure provides a mover offset adjustment device, including an adjustment disk fixed on the side of the mover away from the coil frame, a leaf spring assembly sleeved on the mover, the leaf spring assembly being located between the adjustment disk and the coil frame, and a top member being provided between the adjustment disk and the leaf spring assembly, one end of the top member being movable along the axial direction of the top member to change the angle of the adjustment disk relative to the leaf spring assembly.

[0007] Optionally, the number of top members is multiple, and they are arranged at intervals along the circumference.

[0008] Optionally, a plurality of the top members are evenly arranged circumferentially between the adjusting disc and the leaf spring assembly.

[0009] Optionally, the intersection points of the plurality of top members located on the same plane form a polygon, and the axis of the leaf spring assembly passes through the interior of the polygon in the plane.

[0010] Optionally, the number of the top members is even, and the plurality of the top members are centrally symmetrically distributed about the center point of the end face of the leaf spring assembly.

[0011] Optionally, the number of the top pieces is an odd number.

[0012] Optionally, the top member is a screw, and the adjusting plate has a threaded hole that is threadedly connected to the top member. The top member passes through the threaded hole and abuts against the leaf spring assembly.

[0013] Optionally, the top member includes a telescopic rod disposed between the adjusting disc and the leaf spring assembly. The telescopic rod includes a threaded rod and a threaded sleeve sleeved on the outside of the threaded rod and threadedly connected to the threaded rod. The two ends of the telescopic rod abut against the sides of the adjusting disc and the leaf spring assembly, respectively.

[0014] Optionally, a shim is provided on the side of the leaf spring assembly facing the adjusting disc, and the top member is disposed between the shim and the adjusting disc.

[0015] Optionally, the gasket has a groove that mates with the top member.

[0016] Secondly, this disclosure also provides a linear motor, including the aforementioned offset adjustment device.

[0017] Thirdly, this disclosure also provides a linear compressor, including the aforementioned linear motor.

[0018] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0019] The mover offset adjustment device provided in this disclosure can adjust the mover offset by coaxially fixing the adjustment disc to the mover and then adjusting the relative angle between the adjustment disc and the leaf spring assembly using the top part on the adjustment disc. This allows the adjustment disc to drive the axis of the mover to deflect, thereby achieving the effect of adjusting the mover offset. The installation of this device can not only improve the service life of the linear compressor, but also reduce the later maintenance costs and ensure that the linear compressor can perform compression work stably and continuously. Attached Figure Description

[0020] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0021] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the moving part offset adjustment device according to an embodiment of the present disclosure;

[0023] Figure 2 This is a side view of the mover offset adjustment device according to an embodiment of this disclosure;

[0024] Figure 3 This is a top view of the mover offset adjustment device according to an embodiment of this disclosure.

[0025] Among them, 1. Moving element; 2. Leaf spring assembly; 31. Adjusting disc; 32. Top piece; 33. Threaded hole; 4. Washer; 5. Coil frame. Detailed Implementation

[0026] To better understand the above-mentioned objectives, features, and advantages of this disclosure, the solutions disclosed herein will be further described below. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0027] Numerous specific details are set forth in the following description in order to provide a full understanding of this disclosure, but this disclosure may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some, and not all, of the embodiments of this disclosure.

[0028] Linear compressors are piston compressors that utilize linear motors. They have advantages such as compact structure, light weight, oil-free or low-lubricating oil operation, and excellent variable capacity characteristics. As a result, they are being used more and more widely and have become a major development direction for high-efficiency compressors in small refrigeration units.

[0029] A linear motor consists of a stator and a mover, with the mover performing linear reciprocating motion along the axial direction. The moving-magnet linear oscillating motor, a typical example of this type of linear motor, has a magnetic circuit structure where magnetic material is installed on the circumference of the excitation coil, forming a cylindrical air gap concentric with the excitation coil. The air gap is formed by inner and outer cylindrical stators, and radially magnetized cylindrical permanent magnets reciprocate within this air gap. Due to its optimized magnetic circuit structure and low magnetic circuit losses, this type of linear motor is widely used as a driver for linear compressors. A leaf spring assembly is installed between the cylinder and piston of the linear compressor, using oil lubrication to achieve the reciprocating motion of the piston within the cylinder.

[0030] In the existing technology, when the offset error of the mover is large, the piston and cylinder will rub against each other when the mover is reciprocating. This will not only cause air leakage, but also damage the piston and cylinder, reduce the service life of the entire linear compressor, and increase the maintenance cost in the later stage.

[0031] Based on this, this embodiment provides a mover offset adjustment device, a linear motor, and a linear compressor. By coaxially fixing an adjustment disc to the mover, and then using a top piece on the adjustment disc to adjust the relative angle between the adjustment disc and the leaf spring assembly, the axis of the mover is deflected by the adjustment disc, thereby achieving the effect of adjusting the mover offset. This device not only improves the service life of the linear compressor but also reduces subsequent maintenance costs, ensuring that the linear compressor can perform compression work stably and continuously. The following detailed description uses specific embodiments:

[0032] Reference Figures 1 to 3 As shown, the moving part offset adjustment device provided in this embodiment includes an adjustment disk 31 fixed on the side of the moving part 1 away from the coil frame 5, a leaf spring assembly 2 sleeved on the moving part 1, the leaf spring assembly 2 being located between the adjustment disk 31 and the coil frame 5, and a top member 32 being provided between the adjustment disk 31 and the leaf spring assembly 2. One end of the top member 32 can move along the axial direction of the top member 32 to change the angle of the adjustment disk 31 relative to the leaf spring assembly 2. It should be understood that the axial direction of the top member 32 itself can be parallel to the moving part 1, or it can have a small deviation, as long as the top member 32 can change the relative angle between the adjustment disk 31 and the leaf spring assembly 2 when it moves.

[0033] This setup allows the adjusting disc 31 to be coaxially fixed to the mover 1, and the top piece 32 on the adjusting disc 31 to adjust the relative angle between the adjusting disc 31 and the leaf spring assembly 2. This causes the axis of the mover 1 to deflect using the adjusting disc 31, thereby adjusting the offset of the mover 1. This device not only improves the service life of the linear compressor but also reduces later maintenance costs, ensuring that the linear compressor can perform compression work stably and continuously.

[0034] In some embodiments, there are multiple top members 32, which are arranged at intervals along the circumference. This arrangement enables the multi-angle adjustment of the offset of the mover 1 by utilizing the cooperation of multiple top members 32 and the adjustment disk 31, and can speed up the adjustment of the offset of the mover 1 and improve the efficiency of the offset adjustment.

[0035] In a further embodiment, multiple top members 32 are evenly arranged circumferentially between the adjusting plate 31 and the leaf spring assembly 2, and the distance between any two adjacent top members 32 is the same. Therefore, this arrangement makes it easier to complete the offset adjustment in a specified direction through the cooperation of multiple top members 32.

[0036] Continue to refer to Figure 1 and Figure 2 As shown, the intersection of multiple top pieces 32 located on the same plane forms a polygon, and the axis of the leaf spring assembly 2 in this plane passes through the interior of the polygon. This arrangement enables the full-angle adjustment of the offset of the mover 1, avoids dead angles that cannot be adjusted by the top pieces 32, and ensures that the offset adjustment is completed more smoothly and efficiently.

[0037] In some embodiments, the number of top members 32 is an odd number. The odd number of top members 32 are evenly arranged along the circumference of the mover 1 to avoid two top members 32 being symmetrically arranged on both sides of the mover 1, thereby generating relative reaction forces to each other and weakening the adjustment effect of one side of the top member 32.

[0038] In some embodiments, the number of top members 32 is even, and the multiple top members 32 are centrally symmetrically distributed about the center point of the end face of the leaf spring assembly 2. When the number of top members 32 is four, they are arranged in a rectangular pattern around the mover 1. It should be understood that the four top members 32 can be arranged in a rectangle or a square. When the number of top members 32 is six, they are arranged in a regular hexagon around the mover 1. This arrangement makes it easier to use one or more top members 32 to adjust the offset of the mover 1. An even number of top members 32 makes it easier to decompose all the top members 32 into two groups, and the offset of the mover 1 can be changed more quickly by the relative extension between each pair of top members 32.

[0039] In some embodiments, the top member 32 is a screw, and the adjusting plate 31 has a threaded hole 33 that is threadedly connected to the top member 32. The top member 32 passes through the threaded hole 33 and abuts against the leaf spring assembly 2. This arrangement ensures that the top member 32 maintains its own position after the top member 32 completes the work of adjusting the offset of the mover 1, fixes the adjusted offset of the mover 1, and can also achieve precise control of the stroke of the top member 32 through the characteristics of the threaded engagement, so that the offset adjustment work is more accurate.

[0040] In some embodiments, the top member 32 includes a telescopic rod disposed between the adjusting plate 31 and the leaf spring assembly 2. The telescopic rod includes a threaded rod and a threaded sleeve sleeved on the outside of the threaded rod and threadedly connected to the threaded rod. The two ends of the telescopic rod abut against the sides of the adjusting plate 31 and the leaf spring assembly 2, respectively. Through the threaded sleeve structure of the telescopic rod, the adjustment effect of the threaded connection between the top member 32 and the adjusting plate 31 can also be achieved. The adjustment stroke of the top member 32 can be precisely controlled while it can be stably fixed after adjustment.

[0041] Continue to refer to Figure 1 and Figure 3 As shown, a shim 4 is provided on the side of the leaf spring assembly 2 facing the adjustment plate 31, and a top member 32 is provided between the shim 4 and the adjustment plate 31. The shim 4 can prevent the top member 32 from directly pressing on the leaf spring assembly 2. It should be understood that the shim 4 is made of rigid material, so that the adjustment effect of the top member 32 is better, and the adjustment work of the top member 32 will not be affected by the elastic deformation of the shim 4 itself after being subjected to force.

[0042] In some embodiments, the gasket 4 has a groove that mates with the top member 32. The groove on the gasket 4 makes it less likely for the top member 32 to slip on the gasket 4, resulting in better positioning and more stable and controllable adjustment.

[0043] Secondly, this disclosure also provides a linear motor, including the aforementioned offset adjustment device.

[0044] Thirdly, this disclosure also provides a linear compressor, including the aforementioned linear motor.

[0045] The specific implementation method and principle are the same as those in the above embodiments, and can bring the same or similar technical effects. They will not be repeated here. For details, please refer to the description of the above embodiments of the mover offset adjustment device.

[0046] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0047] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments described herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A mover offset adjustment device, characterized in that, The device includes an adjustment disc (31) fixed on the side of the mover (1) away from the coil frame (5), a leaf spring assembly (2) sleeved on the mover (1), the leaf spring assembly (2) being located between the adjustment disc (31) and the coil frame (5), and a top piece (32) being provided between the adjustment disc (31) and the leaf spring assembly (2). One end of the top piece (32) can move along the axial direction of the top piece (32) to change the angle of the adjustment disc (31) relative to the leaf spring assembly (2). The top member (32) includes a telescopic rod disposed between the adjusting plate (31) and the leaf spring assembly (2). The telescopic rod includes a threaded rod and a threaded sleeve sleeved on the outside of the threaded rod and threadedly connected to the threaded rod. The two ends of the telescopic rod abut against the sides of the adjusting plate (31) and the leaf spring assembly (2), respectively.

2. The mover offset adjustment device according to claim 1, characterized in that, The number of top members (32) is multiple, and they are arranged at intervals along the circumference.

3. The mover offset adjustment device according to claim 2, characterized in that, Multiple top pieces (32) are evenly arranged circumferentially between the adjusting disc (31) and the leaf spring assembly (2).

4. The mover offset adjustment device according to claim 2, characterized in that, The intersection of the multiple top pieces (32) on the same plane forms a polygon, and the axis of the leaf spring assembly (2) passes through the interior of the polygon in the plane.

5. The mover offset adjustment device according to claim 4, characterized in that, The number of the top pieces (32) is even, and the multiple top pieces (32) are centrally symmetrically distributed about the center point of the end face of the leaf spring assembly (2).

6. The mover offset adjustment device according to claim 3 or 4, characterized in that, The number of the top piece (32) is odd.

7. The mover offset adjustment device according to claim 1, characterized in that, The top piece (32) is a screw, and the adjusting plate (31) has a threaded hole (33) that is threadedly connected to the top piece (32). The top piece (32) passes through the threaded hole (33) and abuts against the leaf spring assembly (2).

8. The mover offset adjustment device according to claim 1, characterized in that, A shim (4) is provided on the side of the leaf spring assembly (2) facing the adjustment plate (31), and the top piece (32) is disposed between the shim (4) and the adjustment plate (31).

9. The mover offset adjustment device according to claim 8, characterized in that, The gasket (4) has a groove that mates with the top piece (32).

10. A linear motor, characterized in that, Includes the offset adjustment device as described in any one of claims 1-9.

11. A linear compressor, characterized in that, Includes the linear motor as described in claim 10.

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