Motor and compressor

Abstract

The invention discloses a motor and a compressor, and relates to the technical field of motors, the motor comprises a stator, a terminal storage box, a crimping terminal and a sealing medium, the stator comprises a stator iron core, a stator coil and an external outgoing line, the stator coil and the external outgoing line are arranged on the stator iron core, and the stator coil is provided with an enameled wire; the terminal storage box is fixed at one axial end of the stator core and is positioned on the outer side of the stator coil; the terminal storage box is filled with a sealing medium so as to fix and seal the crimping terminal. According to the technical scheme provided by the invention, the enameled wire and the external lead-out wire are crimped with the terminal and then are placed in the terminal storage box, and the storage box is fixed at the upper part of the iron core and is fixed at the outer side of the stator coil; meanwhile, filling materials are injected into the storage box; through physical isolation (storage box) and filler sealing, direct contact between the terminal and the coil is avoided, the risk of extrusion damage is reduced, and the sealing effect is improved.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and in particular to a motor and a compressor. Background Technology

[0002] In related technologies, during the motor assembly process, the motor's terminal leads are crimped to the stator coil leads using a terminal crimping process. An insulating sleeve is then wrapped around the crimped terminals, and the wrapped insulating sleeve is inserted into the stator coil. End forming and pressing are then used to connect and secure the terminals, enameled wire, and leads. This method is simple and universal, but it also has the following problems: On the one hand, the heat dissipation of crimped terminals embedded in the coil is poor, and under high temperature conditions, the terminals and enameled wires are prone to thermal aging. On the other hand, after the terminals are inserted into the coil, the windings, bushings, and terminals are subjected to stress during the compression and shaping process at the motor end, leading to deformation of the enameled wire, insulation damage, wire breakage, and damage to the insulating bushing. In addition, the bushing provides poor sealing for the crimped terminals, making them susceptible to corrosion and failure in humid or corrosive environments. Summary of the Invention

[0003] The main objective of this invention is to provide a motor and compressor in which enameled wire and external lead wire are crimped to terminals and then placed in a terminal storage box. The storage box is fixed to the upper part of the iron core and to the outside of the stator coil. At the same time, filler is injected into the storage box. In this way, through physical isolation (storage box) and sealing with filler, direct contact between the terminals and the coil is avoided, the risk of crushing damage is reduced, and the sealing effect is improved.

[0004] To achieve the above objectives, the present invention provides an electric motor comprising: The stator includes a stator core and a stator coil disposed on the stator core and external leads, wherein the stator coil has enameled wire; A terminal storage box is fixed to one end of the stator core along its axial direction and located on the outside of the stator coil; A crimp terminal is provided, wherein the crimp terminal crimps the enameled wire and the external lead wire, the crimp terminal is disposed inside the terminal storage box, and the enameled wire and the external lead wire extend from the terminal storage box; and A sealing medium is filled into the terminal housing to secure and seal the crimped terminals.

[0005] In one embodiment, the crimp terminals include a plurality of crimp terminals, and the terminal storage box has a plurality of mounting cavities corresponding to the number of crimp terminals and a plurality of outlets corresponding to the mounting cavities. The crimp terminals are placed in the mounting cavities, and the enameled wire and the external lead wire extend from the outlets. The sealing medium fills the mounting cavities to fix the crimp terminals and seal the outlets.

[0006] In one embodiment, the terminal storage box includes a box body and a cover body. The box body and / or the cover body are provided with a mounting groove. The mounting groove extends in a direction away from the bottom of the terminal storage box. After the box body and the cover body are closed, the mounting groove forms the mounting cavity. The outlet is opened at the upper part of the terminal storage box away from the stator core.

[0007] In one embodiment, the sealing medium is cured within the mounting cavity to form a coating layer, the coating layer covering the crimp terminal and part of the enameled wire and external lead wire, and the thickness of the coating layer is 1 μm to 2 μm.

[0008] In one embodiment, the stator coil has a fixing strap, and the terminal storage box secures the stator coil by means of the fixing strap.

[0009] In one embodiment, the sealing medium is selected from epoxy resin or tin-based alloy.

[0010] In one embodiment, the minimum profile gap between the inner wall of the mounting cavity and the outer surface of the crimp terminal is 0.5 mm to 1.5 mm.

[0011] In one embodiment, the inner wall of the cover is provided with a limiting protrusion protruding towards the box body. The shape of the limiting protrusion is adapted to the shape of the groove of the mounting groove, and the limiting protrusion is embedded in the mounting groove.

[0012] In one embodiment, the housing includes a main body, a retaining arm, and a plug-in base. There are two retaining arms, located on the left and right sides of the main body, respectively. The plug-in base is located at the lower end of the main body. The plug-in base is used to insert into the gap between the upper part of the stator core and the stator coil. The retaining arm is bent inward and clamps the outer peripheral wall of the stator coil. The mounting groove is formed on the outer side wall of the main body, and the cover is detachably connected to the main body.

[0013] In one embodiment, the maximum distance from the bottom of the insertion base to the top of the main body is H, and 20mm≤H≤45mm.

[0014] In one embodiment, the maximum width of the plug-in base is W, and the ratio of H to W is 1 / 2.

[0015] In one embodiment, the box body and the cover body are snapped together and fixed.

[0016] In one embodiment, the mounting groove is formed on the outer side wall of the housing opposite to the stator coil. The housing is also provided with a medium filling groove, which is connected to the mounting groove. After the housing and the cover are closed, the medium filling groove and the cover form a medium filling cavity, and the volume of the medium filling cavity is larger than the volume of the mounting cavity.

[0017] In one embodiment, the cross-sectional diameter of the outlet is smaller than the cross-sectional diameter of the mounting cavity.

[0018] In one embodiment, the axial length of the outlet is L1, and L1 ≥ 3 mm.

[0019] In one embodiment, the inner wall of the crimp terminal is provided with a wall-breaking portion, which is a sharp protrusion structure used to pierce the insulation layer of the enameled wire during the crimping process.

[0020] In one embodiment, the crimp terminal includes a main board body and two crimping edges. The two crimping edges are located on both sides of the main board body and are bent inward to crimp the cable. The wall-breaking portion extends from the middle of the main board body to the two crimping edges and is longitudinally spaced along the length of the main board body.

[0021] The present invention also provides a compressor, including the motor described above.

[0022] The technical solution of this invention achieves metal-to-metal contact between the enameled wire and the lead wire through mechanical pressure by crimping terminals, avoiding poor contact caused by manual operation. The terminal storage box is fixed to one axial end of the stator core, located outside the stator coil. Specifically, the terminal storage box is bound and fixed to the stator coil by the winding strap, and located outside the stator coil, achieving a rigid connection with the stator core and coil, preventing loosening due to vibration during operation. This utilizes the axial space of the stator core without adding extra radial dimensions, adapting to the needs of miniaturized motors. A sealing medium (such as epoxy resin or silicone) fills the internal gaps of the storage box, and after curing, forms an integral structure, isolating the external environment and buffering vibration, meeting the requirements for use in humid and dusty environments. In summary, by crimping the terminals and placing them inside the terminal storage box, which is fixed to the upper part of the core and outside the stator coil; and simultaneously injecting filler into the storage box; this physical isolation (storage box) and sealing with filler prevent direct contact between the terminals and the coil, reducing the risk of crush damage and improving the sealing effect. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0024] Figure 1 A schematic diagram of a terminal storage box arranged in a stator core according to an embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the decomposition structure; Figure 3 A schematic diagram of a terminal storage box according to an embodiment; Figure 4 for Figure 3 A structural diagram from another perspective; Figure 5 for Figure 4 A structural diagram from another perspective; Figure 6 This is a structural schematic diagram of one embodiment of the cover; Figure 7 This is a structural schematic diagram of the cover from another perspective. Figure 8 This is a schematic diagram showing the structure of the crimped terminals, enameled wires, and external leads located inside the housing. Figure 9 for Figure 8 A schematic diagram of the structure after the crimping terminal is crimped with the enameled wire and external lead-out wire; Figure 10 This is a schematic diagram of one embodiment of a crimp terminal.

[0025] Explanation of icon numbers: 100. Stator core; 110. Stator coil; 120. Enamelled wire; 130. External lead wire; 200. Terminal storage box; 200a. Mounting cavity; 200b. Outlet; 200c. Medium filling cavity; 210. Box body; 210a. Main body; 210b. Arm; 210c. Plug-in base; 211. Mounting groove; 212. Medium filling groove; 220. Cover; 221. Limiting protrusion; 300, crimp terminal; 310, main body; 320, crimp edge; 330, cell wall breaking section.

[0026] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] In related technologies, during the motor assembly process, the motor's terminal leads are crimped to the stator coil leads using a terminal crimping process. An insulating sleeve is then wrapped around the crimped terminals, and the wrapped insulating sleeve is inserted into the stator coil. End forming and pressing are then used to connect and secure the terminals, enameled wire, and leads. This method is simple and universal, but it also has the following problems: On the one hand, the heat dissipation of crimped terminals embedded in the coil is poor, and under high temperature conditions, the terminals and enameled wires are prone to thermal aging. On the other hand, after the terminals are inserted into the coil, the windings, bushings, and terminals are subjected to stress during the compression and shaping process at the motor end, leading to deformation of the enameled wire, insulation damage, wire breakage, and damage to the insulating bushing. In addition, the bushing provides poor sealing for the crimped terminals, making them susceptible to corrosion and failure in humid or corrosive environments.

[0031] This invention proposes a motor. By using physical isolation (storage box) and chemical sealing (filler), direct contact between the terminals and the coil is avoided, reducing the risk of crush damage and improving the sealing effect.

[0032] Please see Figure 1 and Figure 2 In one embodiment of the present invention, the motor includes a stator, a terminal housing 200, crimp terminals 300, and a sealing medium. The stator includes a stator core 100, a stator coil 110 disposed on the stator core 100, and an external lead wire 130. The stator coil 110 has enameled wire 120. The terminal housing 200 is fixed to one end of the stator core 100 along its axial direction and is located outside the stator coil 110. The crimp terminals 300 crimp the enameled wire 120 and the external lead wire 130. The crimp terminals 300 are disposed inside the terminal housing 200, and the enameled wire 120 and the external lead wire 130 extend from the terminal housing 200. The sealing medium fills the terminal housing 200 to fix and seal the crimp terminals 300.

[0033] Reference Figure 2 The stator core 100 is a ring structure made of stacked silicon steel sheets, which is used to provide a magnetic circuit and support the stator coil 110. The coil group wound in the stator coil 110 within the slot of the stator core 100 generates a rotating magnetic field when current is passed through it. Its conductor is enameled wire 120 (copper or aluminum wire with an insulating varnish coating on the surface, which serves as electrical insulation). The external lead wire 130 extends from the stator coil 110 to the outside of the motor and is used to connect to an external power supply or control circuit.

[0034] Reference Figure 1 and Figure 2 The terminal storage box 200 is an independent box-shaped structure, fixed to one end of the stator core 100 along the axial direction and located on the radial outer side of the stator coil 110, used to accommodate and protect the crimp terminals 300. The terminal storage box 200 in this solution differs from the wiring of traditional motors in that it is smaller and more compact, allowing it to be placed inside the motor housing rather than outside the motor housing.

[0035] Reference Figure 9 The crimp terminal 300 is a metal connector that uses a mechanical crimping process (without welding) to tightly press the enameled wire 120 and the conductor portion of the external lead wire 130 together to achieve an electrical connection. The sealing medium is an insulating material (such as epoxy resin and tin-based alloy) filled inside the terminal housing box 200, which, after curing, isolates the crimp terminal 300 and the wire connector from the external environment.

[0036] The technical solution of this invention achieves metal-to-metal contact between the enameled wire 120 and the lead wire through mechanical pressure using a crimp terminal 300, avoiding poor contact caused by manual operation. The terminal storage box 200 is fixed to one axial end of the stator core 100, located outside the stator coil 110. Specifically, the terminal storage box 200 is bound and fixed to the stator coil 110 by the winding strap, and is located outside the coil, achieving a rigid connection with the stator core 100 and the coil, preventing loosening due to vibration during operation. This utilizes the axial space of the stator core 100 without increasing the radial dimension, adapting to the needs of miniaturized motors. A sealing medium (such as epoxy resin or silicone) fills the internal gaps of the storage box, and after curing, forms an integral structure, isolating it from the external environment and buffering vibration, meeting the requirements for use in humid and dusty environments. In summary, by crimping the terminals and placing them inside the terminal storage box 200, which is fixed to the upper part of the iron core and to the outside of the stator coil 110, and by injecting filler into the storage box, the terminals are prevented from directly contacting the coil through physical isolation (the storage box) and sealing with filler, thus reducing the risk of crushing damage and improving the sealing effect.

[0037] Specifically, refer to Figure 8 The crimp terminals 300 include multiple crimp terminals. The terminal storage box 200 has multiple mounting cavities 200a corresponding to the number of crimp terminals 300 and multiple outlets 200b corresponding to and communicating with the mounting cavities 200a. The crimp terminals 300 are placed in the mounting cavities 200a, and the enameled wire 120 and the external lead wire 130 extend from the outlets 200b. A sealing medium fills the mounting cavities 200a to fix the crimp terminals 300 and seal the outlets 200b. The crimp terminals 300 include multiple crimp terminals, meaning the number of crimp terminals 300 is two or more (the specific number is determined according to the number of motor phases or wiring requirements; for example, a three-phase motor typically has three or four or more). Each crimp terminal 300 independently completes the crimping of a set of enameled wire 120 and external lead wire 130.

[0038] Combination Figure 5 and Figure 8 The terminal storage box 200 has independent cavities formed by partitions or integral molding structures inside, and the number of these cavities corresponds one-to-one with the crimp terminals 300. The size of each mounting cavity 200a is larger than that of the crimp terminal 300, but the shape matches. The outlet 200b is a through hole opened on the side wall or top of the terminal storage box 200, and the number of these holes is the same as that of the mounting cavities 200a. Each outlet 200b connects to only one mounting cavity 200a and is used for the entry and exit of the enameled wire 120 and the external lead wire 130.

[0039] Specifically, the diameter of the outlet 200b is slightly larger than the diameter of the wire (usually with a gap of 0.2-0.5mm), and the inner wall can be chamfered or fitted with a rubber sealing ring (if further sealing performance is required). The diameter of the outlet 200b is smaller than that of the mounting cavity 200a to limit the wire. In this way, the electrical insulation performance is improved by physically separating multiple mounting cavities 200a; each crimp terminal 300 is individually wrapped and fixed by a sealing medium, enhancing the reliability of mechanical fixation.

[0040] Reference Figure 2 In this embodiment, the terminal storage box 200 includes a box body 210 and a cover 220. The box body 210 and / or the cover 220 are provided with a mounting groove 211. The mounting groove 211 extends in a direction away from the bottom of the terminal storage box 200. After the box body 210 and the cover 220 are closed, they are combined... Figure 5 The mounting groove 211 forms the mounting cavity 200a, and the outlet 200b is located on the upper part of the terminal storage box 200, away from the stator core 100. Of course, in other embodiments, the terminal storage box 200 can also be integrally formed.

[0041] The terminal storage box 200 adopts a split structure, consisting of a box body 210 (bottom and side wall main body) and a cover 220 (top cover plate), which are connected by snaps, plugs, or screws to achieve closure. The cover 220 can be disassembled independently, and when closed, it forms a closed space with the box body 210. In some designs, the cover 220 can also integrate a mounting groove 211 or a sealing medium injection port. The mounting groove 211 is a recess opened on the box body 210 or the cover 220, and its extension direction is from the bottom of the storage box (the end near the stator core 100) to the top (the end away from the stator core 100), that is, axial extension. The outlet 200b is opened at the upper part of the terminal storage box 200 away from the stator core 100. The upper part refers to the end away from the stator core 100 after the terminal storage box 200 is closed (i.e., the "top" of the motor axis). The outlet 200b is opened in a direction perpendicular to the axial direction or inclined upward.

[0042] The specific assembly process is as follows: Open the cover 220 and insert the crimp terminal 300 axially into the mounting groove 211 of the housing 210 (or the mounting groove 211 of the cover 220). Insert the crimped wire and close the cover 220 (at this time, the box 210 and the mounting groove 211 of the cover 220 form a closed mounting cavity 200a). The sealing medium is injected into the mounting cavity 200a through the pre-set injection port of the cover 220. The medium flows axially along the mounting groove 211 and fills the gap. Finally, a small amount overflows from the outlet 200b (indicating that the filling is complete), and a seal is formed after curing.

[0043] It is easier to assemble and maintain than an integrated solution.

[0044] Specifically, considering both insulation reliability and structural stability, the sealing medium is cured within the mounting cavity 200a to form a coating layer (not shown in the figure). This coating layer covers the crimp terminal 300, a portion of the enameled wire 120, and the external lead 130, and has a thickness of 1 μm to 2 μm. The coating layer refers to the continuous insulating protective layer formed on the surfaces of the crimp terminal 300, enameled wire 120, and external lead 130 after the sealing medium (such as epoxy resin) has cured within the mounting cavity 200a. Its thickness ranges from 1 micrometer (μm) to 2 micrometers (μm). In addition to the crimp terminal 300 itself, it extends beyond the exposed portion of the enameled wire 120 and the lead 130, forming an integrated "terminal-wire" insulation protection.

[0045] Specifically, to ensure a secure fit, the stator coil 110 has a fixing strap, and the terminal storage box 200 secures the stator coil 110 by binding it with the fixing strap. The fixing strap is a high-strength fiber tape (such as fiberglass tape or aramid tape) or metal cable tie wrapped around the outer periphery of the stator coil 110. The side wall of the terminal storage box 200 is provided with a strap groove, and the storage box and the stator coil 110 are bound together as a whole by wrapping the strap.

[0046] Specifically, refer to Figure 3 The box body 210 includes a main body 210a, a retaining arm 210b, and a plug-in base 210c, as shown in the figure. Figure 4 The arm-shaped parts 210b are two in number and are located on the left and right sides of the main body 210a respectively, and the insertion base 210c is located at the lower end of the main body 210a; see reference. Figure 1 The insertion base 210c is used to insert into the gap between the upper part of the stator core 100 and the stator coil 110. The clamping arm 210b bends inward and clamps the outer peripheral wall of the stator coil 110. The mounting groove 211 is formed on the outer side wall of the main body 210a, and the cover 220 is detachably connected to the main body 210a. The main body 210a is the core supporting structure of the terminal storage box 200, and is rectangular or trapezoidal in shape. It has a mounting groove 211 (for forming a mounting cavity 200a) on its inner or outer side wall, its top is connected to the cover 220, and its lower end is integrally formed with the insertion base 210c. Figure 2The clamping arms 210b consist of two symmetrically distributed elastic clamping arms on the left and right sides of the main body 210a. Their ends are bent inwards (towards the stator coil 110) to form arc-shaped clamping surfaces (the radius of curvature matches the outer periphery of the stator coil 110). The insertion base 210c is a plate-like protrusion located at the lower end of the main body 210a. Its width is slightly smaller than the radial gap between the upper part of the stator core 100 and the stator coil 110. After insertion, it is fixed by interference fit or friction. Fixing straps are attached to the two clamping arms 210b to improve the reliability of the fixation.

[0047] Reference Figure 3 Specifically, the maximum distance from the bottom of the insertion base 210c to the top of the main body 210a is H, and 20mm≤H≤45mm; H is the "total height" (axial dimension) of the terminal storage box 200, from the lowest end face of the insertion base 210c (the surface in contact with the stator core 100) to the highest end face of the main body 210a (the top surface after the cover 220 is fastened), with a tolerance control of ±0.5mm. The lower limit is 20mm, based on the height of common crimp terminals 300; the upper limit is 45mm, adapting to the stator axial dimension of mainstream small and medium-sized motors.

[0048] Reference Figure 4 Specifically, the maximum width of the insertion base 210c is W, and the ratio of H to W is 1 / 2; W is the radial width (the dimension perpendicular to the axial direction) of the insertion base 210c, which forms a fixed proportional relationship with H (e.g., W=40mm when H=20mm, W=90mm when H=45mm), ensuring that the "height-to-width ratio" of the structure is constant, so as to ensure sufficient structural strength and ensure that there is no interference during insertion.

[0049] Specifically, to meet the needs of different scenarios, the sealing medium is selected from epoxy resin or tin-based alloy.

[0050] Specifically, to balance the fixing strength and the filling of the sealing medium, the minimum profile gap between the inner wall of the mounting cavity 200a and the outer surface of the crimp terminal 300 is 0.5mm to 1.5mm.

[0051] Furthermore, the inner wall of the cover 220 is provided with a limiting protrusion 221 protruding towards the box 210. The shape of the limiting protrusion 221 is adapted to the shape of the groove of the mounting groove 211, and the limiting protrusion 221 is embedded in the mounting groove 211. The limiting protrusion 221 is a protruding structure (made of the same material as the cover 220) extending from the inner wall of the cover 220 towards the box 210. Its cross-sectional shape (such as rectangular, trapezoidal, or irregular) is perfectly matched with the shape of the groove of the mounting groove 211, forming a "convex-concave" fit after being embedded in the mounting groove 211. When the cover 220 is closed, the limiting protrusion 221 is inserted into the groove along the axial direction of the mounting groove 211.

[0052] Combined with reference Figure 5 and Figure 6 The box body 210 and the cover body 220 are snapped together and fixed. Furthermore, the limiting protrusion 221 can be used as a quick positioning pin for the cover body 220 to close. During assembly, there is no need for visual alignment. The blind insertion closing is achieved through the guiding effect of the protrusion and the slot, which improves the assembly efficiency.

[0053] Reference Figure 5 Specifically, the mounting groove 211 is located on the outer wall of the housing 210 away from the stator coil 110. The housing 210 also has a medium filling groove 212, which communicates with the mounting groove 211. After the housing 210 is closed with the cover 220, the medium filling groove 212 and the cover 220 together form a medium filling cavity 200c, the volume of which is larger than the volume of the mounting cavity 200a. The mounting groove 211 is located on the outer wall of the housing 210 away from the stator coil 110 (i.e., the outer side of the housing 210, not the inner wall in contact with the stator), ensuring that the crimp terminal 300 and the wire are led out from outside the motor (avoiding interference with the stator coil 110). The medium filling groove 212 and the mounting groove 211 form an inverted "T" structure to ensure the stability of the sealing medium after fixation.

[0054] Reference Figure 5 Specifically, the cross-sectional diameter of the outlet 200b is smaller than the cross-sectional diameter of the mounting cavity 200a; and / or, the axial length of the outlet 200b is L1, and L1 ≥ 3mm. The outlet 200b is a channel (usually a circular or rectangular hole) through which the wire is led out from the mounting cavity 200a to the outside. On the one hand, the reduced diameter can prevent the sealing medium from overflowing through the outlet 200b before curing; on the other hand, it can also constrain and limit the wire harness.

[0055] Reference Figure 9 and Figure 10 Furthermore, the inner wall of the crimp terminal 300 is provided with a wall-breaking portion 330, which is a sharp protrusion structure used to pierce the insulation layer of the enameled wire 120 during the crimping process. During the crimping process, the terminal is subjected to a large radial pressure (applied through the crimping die), and the tip of the wall-breaking portion 330 generates a large local pressure (exceeding the yield strength of the insulation layer of the enameled wire 120), achieving "pre-stripping" insulation layer piercing. Compared with traditional terminals that require manual or equipment pre-stripping of the insulation layer of the enameled wire 120 (increased process, low efficiency), the wall-breaking portion 330 simultaneously completes piercing and conductive connection through mechanical crimping.

[0056] Furthermore, referring to Figure 10The crimp terminal 300 includes a main board body 310 and two crimping edges 320. The two crimping edges 320 are respectively located on both sides of the main board body 310 and bent inward to crimp the cable. The wall-breaking portion 330 extends from the middle of the main board body 310 towards the two crimping edges 320, and is provided longitudinally at intervals along the length direction of the main board body 310. (Refer to...) Figure 9 The crimping edge 320 consists of two elastic flanges symmetrically distributed on both sides of the main body 310. After crimping, they form a "U-shaped" or "O-shaped" wire clamp (selected according to the cross-section of the wire). The wall-breaking part 330 extends from the middle of the main body 310 to the crimping edges 320 on both sides. Multiple wall-breaking parts 330 are set at intervals of 1.5-2mm along the length direction of the main body 310 (the wire axis). (In this scheme, in order to ensure the piercing effect, the number is more than 4, such as 4 or 5, to form a "multi-point array piercing" structure.

[0057] The present invention also proposes a compressor, which includes a motor. The specific structure of the motor is as described in the above embodiments. Since the compressor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0058] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. An electric motor, characterized in that, include: The stator includes a stator core and a stator coil disposed on the stator core and external leads, wherein the stator coil has enameled wire; A terminal storage box is fixed to one end of the stator core along its axial direction and located on the outside of the stator coil; A crimp terminal is provided, wherein the crimp terminal crimps the enameled wire and the external lead wire, the crimp terminal is disposed inside the terminal storage box, and the enameled wire and the external lead wire extend out from the terminal storage box; and A sealing medium is filled into the terminal housing to secure and seal the crimped terminals.

2. The motor as described in claim 1, characterized in that, The crimp terminals include multiple ones. The terminal storage box has multiple mounting cavities corresponding to the number of crimp terminals and multiple outlets corresponding to the mounting cavities. The crimp terminals are placed in the mounting cavities, and the enameled wire and external lead wire extend from the outlets. The sealing medium fills the mounting cavities to fix the crimp terminals and seal the outlets.

3. The motor as described in claim 2, characterized in that, The terminal storage box includes a box body and a cover body. The box body and / or the cover body are provided with a mounting groove. The mounting groove extends in a direction away from the bottom of the terminal storage box. After the box body and the cover body are closed, the mounting groove forms the mounting cavity. The outlet is opened at the upper part of the terminal storage box away from the stator core.

4. The motor as described in claim 2, characterized in that, The sealing medium is cured in the mounting cavity to form a coating layer, which covers the crimp terminal, part of the enameled wire and external lead wire, and the thickness of the coating layer is 1μm to 2μm. And / or, the stator coil has a fixing strap, and the terminal storage box secures the stator coil by means of the fixing strap.

5. The motor as described in any one of claims 1 to 4, characterized in that, The sealing medium is selected from epoxy resin or tin-based alloy.

6. The motor as described in claim 3, characterized in that, The minimum profile gap between the inner wall of the mounting cavity and the outer surface of the crimp terminal is 0.5 mm to 1.5 mm.

7. The motor as described in claim 6, characterized in that, The inner wall of the cover is provided with a limiting protrusion that protrudes towards the box body. The shape of the limiting protrusion is adapted to the shape of the groove of the mounting groove, and the limiting protrusion is embedded in the mounting groove.

8. The motor as described in claim 3, characterized in that, The housing includes a main body, a retaining arm, and a plug-in base. There are two retaining arms, located on the left and right sides of the main body, respectively. The plug-in base is located at the lower end of the main body. The plug-in base is used to insert into the gap between the upper part of the stator core and the stator coil. The retaining arm is bent inward and clamps the outer peripheral wall of the stator coil. The mounting groove is opened on the outer side wall of the main body. The cover is detachably connected to the main body.

9. The motor as described in claim 8, characterized in that, The maximum distance from the bottom of the plug-in base to the top of the main body is H, and 20mm≤H≤45mm; And / or, the maximum width of the plug-in base is W, and the ratio of H to W is 1 / 2; And / or, the box body and the cover body are snapped together and fixed.

10. The motor as described in claim 3, characterized in that, The mounting groove is located on the outer side wall of the housing away from the stator coil. The housing is also provided with a medium filling groove located below the mounting groove relative to the outlet. The medium filling groove is connected to the mounting groove. After the housing and the cover are closed, the medium filling groove and the cover form a medium filling cavity. The volume of the medium filling cavity is larger than the volume of the mounting cavity.

11. The motor as described in claim 2, characterized in that, The cross-sectional diameter of the outlet is smaller than the cross-sectional diameter of the mounting cavity; and / or, the axial length of the outlet is L1, and L1 ≥ 3 mm.

12. The motor as described in claim 1, characterized in that, The inner wall of the crimp terminal is provided with a wall-breaking part, which is a sharp protrusion structure used to pierce the insulation layer of the enameled wire during the crimping process.

13. The motor as described in claim 12, characterized in that, The crimping terminal includes a main board body and two crimping edges. The two crimping edges are located on both sides of the main board body and are bent inward to crimp the cable. The wall-breaking portion extends from the middle of the main board body to the two crimping edges and is longitudinally spaced along the length of the main board body.

14. A compressor, characterized in that, include: The motor as described in any one of claims 1 to 13.

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