Wire threading structure for energizing inner ring of plate spring, linear motor and linear compressor

Abstract

The present disclosure relates to the technical field of linear motors, and particularly relates to a wire threading structure for energizing an inner ring of a plate spring, a linear motor and a linear compressor. The wire threading structure for energizing the inner ring of the plate spring comprises a mover, a wire passage is formed in the mover, a plurality of plate springs are sleeved on the mover, both ends of a wire pass through the wire passage and are electrically connected to two plate springs respectively, and the two plate springs electrically connected to both ends of the wire are insulated. The structure can realize that the wire passes through the mover through the wire passage and is connected to the plate spring, and then a through hole for threading the wire is not needed to be formed in the plate spring, the production cost of the plate spring is reduced, meanwhile, the wire passes through the wire passage, the contact frequency between the wire and the plate spring is reduced, the degree of mutual abrasion between the wire and the plate spring is reduced, the probability of damage of the wire and the plate spring is reduced, and the linear motor can work stably for a long time.

Description

Technical Field

[0001] This disclosure relates to the field of linear motor technology, and in particular to a wire-threading structure for energizing the inner ring of a leaf spring, 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] When leaf spring assemblies serve as support structures, they also function as part of the coil circuit due to their conductivity. In existing technologies, the ends of the coils are welded to the sides of the leaf springs to electrically connect them. However, this method causes the ends of the coils to protrude outwards from the sides of the leaf springs, resulting in irregular gaps between the contact surfaces of the multi-layer leaf spring assemblies mounted on the mover. This not only affects the movement of the mover but also exacerbates the wear and tear between the leaf spring assemblies and their internal components, thus impacting the lifespan of the entire leaf spring assembly and the mover. Summary of the Invention

[0005] To solve the above-mentioned technical problems, or at least partially solve them, this disclosure provides a threading structure for energizing the inner ring of a leaf spring, a linear motor, and a linear compressor.

[0006] In a first aspect, this disclosure provides a wire-threaded structure for energizing the inner ring of a leaf spring, including a mover, on which a wire passage is provided, and multiple leaf springs are sleeved on the mover. Both ends of the wire pass through the wire passage and are electrically connected to two of the leaf springs respectively, and the two leaf springs corresponding to the two ends of the wire are insulated.

[0007] Optionally, the wire passage is a groove formed axially on the surface of the mover, and the end of the wire passes through the groove and is electrically connected to the leaf spring.

[0008] Optionally, the wire groove is connected to the wire fixing groove at the end of the coil frame to form an L-shaped wire groove, and the wire is embedded in the L-shaped wire groove.

[0009] Optionally, the wire passage includes a hollow channel opened along the axial direction on the mover and two wire holes opened on the side wall of the mover. The two wire holes are connected through the hollow channel, and the ends of the wires pass through the two wire holes in sequence and are electrically connected to the leaf spring.

[0010] Optionally, a conductive electrode is fitted to the side of the leaf spring, and the end of the wire is electrically connected to the leaf spring through the conductive electrode.

[0011] Optionally, the conductive electrode is a metal ring coaxially sleeved on the mover.

[0012] Optionally, an insulating pad is provided between the leaf springs that are respectively connected to both ends of the wire, and the insulating pad is coaxially sleeved on the mover.

[0013] Optionally, the conductor is provided with an insulating layer, with only the end extending out of the insulating layer and electrically connected to the leaf spring.

[0014] Secondly, this disclosure also provides a linear motor with a wire-threading structure that utilizes the inner ring of the leaf spring as described above for energizing.

[0015] Thirdly, this disclosure also provides a linear compressor utilizing the linear motor described above.

[0016] The technical solution provided in this disclosure has the following advantages compared with the prior art:

[0017] The wire-passing structure for energizing the inner ring of the leaf spring disclosed herein allows the wire to pass through the mover and connect to the leaf spring via a wire path, thereby eliminating the need for through holes in the leaf spring for wire passage. This reduces the production cost of such a common component as the leaf spring. At the same time, passing the wire through the wire path reduces the contact frequency between the wire and the leaf spring, reduces the degree of mutual wear between the wire and the leaf spring, and thus reduces the probability of damage to the wire and the leaf spring, ensuring that the linear motor can operate stably for a long time. Attached Figure Description

[0018] 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.

[0019] 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.

[0020] Figure 1 This is a top view of the wire threading structure for energizing the inner ring of the leaf spring according to an embodiment of this disclosure;

[0021] Figure 2 This is a schematic diagram of the wire-threading structure for energizing the inner ring of a leaf spring according to an embodiment of the present disclosure, excluding the leaf spring and the conductive electrode.

[0022] Figure 3 This is a side view of the wire threading structure for energizing the inner ring of the leaf spring according to an embodiment of this disclosure.

[0023] Among them, 1. Moving element; 2. Wire passage; 31. Leaf spring; 32. Conductive electrode; 4. Coil frame; 5. Wire fixing groove; 6. Insulating gasket. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] When leaf spring assemblies serve as support structures, they also function as part of the coil circuit due to their conductivity. In existing technologies, the ends of the coils are welded to the sides of the leaf springs to electrically connect them. However, this method causes the ends of the coils to protrude outwards from the sides of the leaf springs, resulting in irregular gaps between the contact surfaces of the multi-layer leaf spring assemblies mounted on the mover. This not only affects the movement of the mover but also exacerbates the wear and tear between the leaf spring assemblies and their internal components, thus impacting the lifespan of the entire leaf spring assembly and the mover.

[0029] Based on this, this embodiment provides a wire-threading structure for energizing the inner ring of a leaf spring, a linear motor, and a linear compressor. This structure allows the wire to pass between the driven element and the insulating cylinder and connect to the leaf spring via a wire path and an insulating cylinder, eliminating the need for through holes in the leaf spring for wire threading. This reduces the production cost of such a common component as the leaf spring. Furthermore, passing the wire through the wire path reduces the frequency of contact between the wire and the leaf spring, decreasing mutual wear and tear, and consequently reducing the probability of damage to both, ensuring the linear motor can operate stably for extended periods. Specific embodiments are described in detail below:

[0030] Reference Figures 1 to 2 As shown, the wire-threading structure for energizing the inner ring of a leaf spring provided in this embodiment includes a mover 1. The mover 1 can be made of insulating material or conductive metal material. When the mover 1 is made of conductive material, an insulating cylinder is sleeved on the mover 1 or an insulating coating is applied to the surface of the mover 1. A wire passage 2 is provided between the mover 1 and the insulating cylinder. The two ends of the wire passage 2 are located on both sides of the insulating cylinder. Multiple leaf springs 31 are sleeved on the insulating cylinder. Both ends of the wire pass through the wire passage 2 and are electrically connected to two leaf springs 31 respectively. When the mover 1 is made of insulating material, an insulating cylinder is not required.

[0031] This configuration allows the wire to pass through the actuator 1 and connect to the leaf spring 31 via the wire path 2, eliminating the need for a through hole in the leaf spring 31 for the wire, thus reducing the production cost of this common component. At the same time, passing the wire through the wire path 2 reduces the contact frequency between the wire and the leaf spring 31, reducing the degree of wear between them, and consequently reducing the probability of damage to the wire and the leaf spring 31, ensuring that the linear motor can operate smoothly for a long time.

[0032] In some embodiments, the wire passage 2 is a groove formed axially on the surface of the mover 1, and the end of the wire passes through the groove and is electrically connected to the leaf spring 31. Setting the wire passage 2 as a groove on the mover 1 facilitates the installation and removal of the wire.

[0033] In a further embodiment, the wire groove and the wire fixing groove 5 at the end of the coil frame 4 are connected to form an L-shaped wire groove. The wire is embedded in the L-shaped wire groove. The L-shaped wire groove can prevent the wire from being bent into too many segments, thereby affecting the strength of the wire. The L-shaped wire groove can connect the wire passage 2 and the wire fixing groove 5 into one unit, so that the wire can be connected from the coil frame 4 to the leaf spring 31 with only two bends. This can extend the service life of the wire and reduce the maintenance cost of the linear motor in the later stage.

[0034] In some embodiments, the wire passage 2 includes a hollow channel opened along the axial direction on the mover 1 and two wire holes opened on the side wall of the mover 1. The two wire holes are connected through the hollow channel, and the ends of the wires pass through the two wire holes in sequence and are electrically connected to the leaf spring 31. This configuration of the wire passage 2 allows a part of the wire passage 2 to extend into the hollow mover 1, which can not only effectively reduce the contact area between the wire and the leaf spring 31 and the conductive electrode 32, thereby reducing the wear rate of the wire, but also prevent the wire from affecting the movement of the leaf spring 31 and the conductive electrode 32 following the movement of the mover 1.

[0035] Continue to refer to Figure 1 and Figure 3 As shown, a conductive electrode 32 is attached to the side of the leaf spring 31. The end of the wire is electrically connected to the leaf spring 31 through the conductive electrode 32. The conductive electrode 32 eliminates the need to solder the wire to the leaf spring 31, making it easier to replace and maintain the leaf spring 31. The conductive electrode 32 has a simpler structure and is easier to manufacture than the leaf spring 31. The conductive electrode 32 also reduces the maintenance cost of the linear motor in the later stages. It should be noted that the conductive electrode 32 is a metal ring coaxially sleeved on the mover 1. Specifically, it can be a ring structure made of any conductive material such as a gold ring or a copper ring.

[0036] In some embodiments, an insulating pad 6 is provided between the leaf springs 31 that are respectively connected to both ends of the wire. The insulating pad 6 is coaxially sleeved on the mover 1. The provision of the insulating pad 6 can make the circuit of the entire linear motor more stable and less prone to short circuit and other circuit problems.

[0037] In a further embodiment, an insulating layer is provided on the wire, with only the end extending out of the insulating layer and electrically connected to the leaf spring 31. The insulating layer on the wire can better protect the circuit and prevent short circuits, thereby ensuring the smooth operation of the linear motor.

[0038] Secondly, this disclosure also provides a linear motor with a wire-threading structure that utilizes the inner ring of the leaf spring as described above for energizing.

[0039] Thirdly, this disclosure also provides a linear compressor utilizing the linear motor described above.

[0040] 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 described in detail here. For details, please refer to the description of the above embodiment of the wire-threading structure with the inner ring of the leaf spring energized.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, 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. Without further limitations, 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.

[0042] 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 threaded structure for energizing the inner ring of a leaf spring, characterized in that, Includes a mover (1), on which a wire passage (2) is provided, and multiple leaf springs (31) are sleeved on the mover (1). Both ends of the wire pass through the wire passage (2) and are electrically connected to two leaf springs (31) respectively. The two leaf springs (31) that are electrically connected to the ends of the wire are insulated. The wire passage (2) is a groove opened along the axial direction on the surface of the mover (1), and the end of the wire passes through the groove and is electrically connected to the leaf spring (31). The wire groove is connected to the wire fixing groove (5) at the end of the coil frame (4) to form an L-shaped wire groove, and the wire is embedded in the L-shaped wire groove; The wire passage (2) includes a hollow channel opened along the axial direction on the mover (1) and two wire holes opened on the side wall of the mover (1). The two wire holes are connected through the hollow channel, and the ends of the wires pass through the two wire holes in sequence and are electrically connected to the leaf spring (31). A conductive electrode (32) is attached to the side of the leaf spring (31), and the end of the wire is electrically connected to the leaf spring (31) through the conductive electrode (32).

2. The threaded structure for energizing the inner ring of a leaf spring according to claim 1, characterized in that, The conductive electrode (32) is a metal ring coaxially sleeved on the mover (1).

3. The threaded structure for energizing the inner ring of a leaf spring according to claim 1, characterized in that, An insulating pad (6) is provided between the leaf springs (31) that are respectively connected to the two ends of the conductor, and the insulating pad (6) is coaxially sleeved on the mover (1).

4. The threaded structure for energizing the inner ring of a leaf spring according to claim 1, characterized in that, The conductor is provided with an insulating layer, with only the end extending out of the insulating layer and electrically connected to the leaf spring (31).

5. A linear motor, characterized in that, Includes the threading structure as described in any one of claims 1-4.

6. A linear compressor, characterized in that, Includes the linear motor as described in claim 5.

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