Sealing structure for motor phase line and sealing method for motor phase line

Abstract

The invention belongs to the technical field of motor sealing, and discloses a sealing structure for a motor phase line and a sealing method for the motor phase line, the sealing structure for the motor phase line comprises a shell, the shell sleeves the periphery of the joint of the phase line and a wire of a stator winding, and two ends of the shell are respectively provided with a first through hole and a second through hole. The phase line and the wire respectively extend out of the shell through the first through hole and the second through hole, and the shell is filled with sealant, so that the periphery of the joint position of the phase line and the wire is fully wrapped by the sealant, a compact sealing environment is formed on the periphery of the joint position of the phase line and the wire, and liquid cooling oil leakage is avoided. And the short circuit phenomenon of the motor after the tin layer at the periphery of the joint position of the phase line and the stator winding is damaged is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of motor sealing, and in particular to a sealing structure for motor phase lines and a sealing method for motor phase lines. Background Art

[0002] Traditional hub motors mainly use air as a medium for heat dissipation, but the heat conduction efficiency of air is low. In addition, since the motor cannot effectively exchange gas with the outside world, water vapor is easily generated inside the motor due to sudden changes in gas temperature, which greatly affects the performance of the motor.

[0003] In order to solve the above problems, the prior art adopts liquid cooling to replace the cooling of the motor. Specifically, liquid cooling oil is injected into the motor, so that the motor heat is dissipated by the liquid cooling oil. However, liquid cooling can also cause problems such as motor oil leakage. Therefore, the prior art generally avoids motor oil leakage by means of shaft hole sealing, end cover sealing, etc. However, for the phase line of the motor, since the joint position of the phase line and the stator winding is not specially provided with a sealing structure, the motor still has the phenomenon of oil leakage. Moreover, when the joint position of the phase line and the stator winding is damaged, the motor will short-circuit.

[0004] Therefore, the above problems need to be solved urgently. Summary of the invention

[0005] The object of the present invention is to provide a sealing structure for a motor phase line and a sealing method for a motor phase line, so as to solve the problem that for the motor phase line, since no special sealing structure is provided at the joint position between the phase line and the stator winding, the motor still leaks oil, and when the joint position between the phase line and the stator winding is damaged, the motor will short-circuit.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] On the one hand, the present invention provides a sealing structure for motor phase lines, comprising a shell, which is sleeved on the outer circumference of the junction between the phase line and the conductor of the stator winding, and the two ends of the shell are respectively provided with a first through hole and a second through hole, and the phase line and the conductor extend out of the shell through the first through hole and the second through hole respectively, and the inside of the shell is filled with sealant.

[0008] Preferably, the outer shell comprises a first shell and a second shell, and the first shell and the second shell are spliced ​​to form the outer shell.

[0009] Preferably, one side of the first shell is connected to the second shell via a connecting plate, a fold is provided on the connecting plate, the first shell and the second shell can rotate relative to or away from each other around the fold, and have a first working position for snapping together to form the outer shell, and a side of the first shell away from the second shell can be snapped together with a side of the second shell away from the first shell.

[0010] Preferably, a glue injection hole is provided on the shell.

[0011] Preferably, a first rubber guide plate and a second rubber guide plate are respectively provided at both ends of the shell, and the first rubber guide plate and the second rubber guide plate are both located inside the shell, the first rubber guide plate is arranged close to the first perforation, and the second rubber guide plate is arranged close to the second perforation, and the width of the first rubber guide plate gradually decreases from a side close to the first perforation to a side away from the first perforation, and the width of the second rubber guide plate gradually decreases from a side close to the second perforation to a side away from the second perforation.

[0012] Preferably, a hanging ear is provided on the outer wall of the shell, and the shell is fixedly connected to the stator by a cable tie passing through the hanging ear.

[0013] Another aspect of the present invention further provides a method for sealing a motor phase line, comprising:

[0014] A casing is sheathed around the junction of the phase line and the conductor of the stator winding;

[0015] Inject sealant into the interior of the housing and leave it to stand for a preset time.

[0016] Preferably, the housing is formed by assembling a first housing and a second housing;

[0017] The junction between the phase line and the conductor is bent, and the first shell and the second shell are buckled on the outer periphery of the junction between the phase line and the conductor.

[0018] Preferably, sealant is injected into the interior of the shell through a glue injection hole provided on the shell until the glue overflows.

[0019] Preferably, the motor is provided with a plurality of the phase lines, and the outer peripheries of the joint positions of all the phase lines are sleeved with the outer casing.

[0020] Beneficial effects of the present invention:

[0021] The present invention allows the periphery of the joint position of the phase line and the conductor to be fully wrapped by the sealant, thereby forming a dense sealing environment at the periphery of the joint position of the phase line and the conductor, thereby avoiding leakage of liquid cooling oil and avoiding short circuit of the motor after the tin layer at the periphery of the joint position of the phase line and the stator winding is damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is one of the cross-sectional views of the motor in the embodiment of the present invention;

[0023] Figure 2 is a second cross-sectional view of the motor in the embodiment of the present invention;

[0024] Figure 3 This is one of the structural schematic diagrams of the first shell and the second shell in the second working position in an embodiment of the present invention;

[0025] Figure 4 This is a second structural schematic diagram of the first housing and the second housing in the second working position according to an embodiment of the present invention;

[0026] Figure 5 1 is a schematic structural diagram of a first shell and a second shell in a first working position according to an embodiment of the present invention.

[0027] In the figure:

[0028] 110, phase line; 120, stator winding; 130, conductor; 140, mounting frame; 210, housing; 211, first through hole; 212, second through hole; 213, first shell; 2131, first buckle part; 214, second shell; 2141, second buckle part; 215, connecting plate; 2151, fold; 216, glue injection hole; 217, hanging ear; 221, first glue guide plate; 222, second glue guide plate; 230, cable tie. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0030] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0033] like Figure 1 and Figure 2 As shown, this embodiment takes a three-phase motor as an example, the motor includes a plurality of stator windings 120, the plurality of stator windings 120 are divided into three phases, each phase is twisted with two wires 130, the two wires 130 are connected in parallel, and accordingly, the motor includes three phase lines 110, each phase line 110 corresponds to a phase of the stator winding 120, for any phase line 110, the phase line 110 includes two wires, the outside of the two wires is wrapped with rubber, and the two wires are electrically connected to the two wires 130 respectively.

[0034] When preparing the motor, firstly, the paint film at the end of all the wires 130 is removed by a dedicated device, and then all the wires 130 are divided into three phases according to the above classification method. For example, the three phases are A phase, B phase, and C phase, and the wires 130 of each phase are twisted into a strand. Then, the ends of the three phase wires 110 are stripped, that is, the rubber at the ends of the phase wires 110 is removed to expose two wires. Then, the A phase is connected to one of the phase wires 110. For example, the three phase wires 110 are the first phase wire, the second phase wire, and the third phase wire. Specifically, the position where the paint film is removed on one of the wires 130 of the A phase is twisted together with one of the wires of the first phase wire, and the position where the paint film is removed on another wire 130 of the A phase is twisted together with another wire of the first phase wire. Then, the B phase and the C phase are connected to the second phase wire and the third phase wire respectively by the same method. For the twisted wires 130 and wires, tinning is used to make them firmly connected.

[0035] For the phase line 110, since there is no special sealing structure at the joint position between the phase line 110 and the conductive wire 130, liquid cooling oil is easy to leak from the gap between the two wires wrapped in the same rubber. Moreover, when the tin layer on the periphery of the joint position between the phase line 110 and the stator winding 120 is damaged, the motor will short-circuit.

[0036] To solve the above problems, please refer to Figures 1 to 5 The present embodiment provides a sealing structure for a motor phase line, which includes a shell 210. The shell 210 is sleeved on the outer periphery of the joint between the phase line 110 and the wire 130 of the stator winding 120. The two ends of the shell 210 are respectively provided with a first through hole 211 and a second through hole 212. The phase line 110 and the wire 130 extend out of the shell 210 through the first through hole 211 and the second through hole 212 respectively. The shell 210 is filled with sealant so that the outer periphery of the joint position between the phase line 110 and the wire 130 is fully wrapped by the sealant, thereby forming a dense sealing environment at the outer periphery of the joint position between the phase line 110 and the wire 130, thereby avoiding leakage of liquid cooling oil and avoiding short circuit of the motor after the tin layer at the outer periphery of the joint position between the phase line 110 and the stator winding 120 is damaged.

[0037] It can be understood that, for any phase line 110 , the outer periphery of the joint between the phase line 110 and the conductor 130 of the stator winding 120 is provided with the above-mentioned sealing structure.

[0038] Based on the above, this embodiment further provides a method for sealing a motor phase line, and the method for sealing a motor phase line includes:

[0039] A housing 210 is sheathed around the junction of the phase line 110 and the conductor 130 of the stator winding 120;

[0040] The sealant is injected into the housing 210 and left to stand for a preset time.

[0041] After standing for a preset time, the sealant is cured, thereby being able to seal the joint between the phase line 110 and the conductor 130 .

[0042] In addition, based on the content mentioned above, in this embodiment, the motor is provided with three phase lines 110, and the outer peripheries of the joint positions of all phase lines 110 are sleeved with a shell 210, that is, for any phase line 110, the outer periphery of the joint between it and the conductor 130 of the stator winding 120 is provided with the above-mentioned sealing structure.

[0043] Specifically, the sealing method described above is first used to seal the joint between the A-phase conductor 130 and the first phase line, and then the same method is used to seal the joint between the B-phase conductor 130 and the second phase line and the joint between the C-phase conductor 130 and the third phase line.

[0044] It is understandable that in other optional embodiments, the stator winding 120 of the motor may also be of other numbers, and accordingly, the phase lines 110 included in the motor may also be of other numbers. The number of phases of the stator winding 120 is the same as the number of phase lines 110 included in the motor, and this embodiment does not impose any specific restrictions on this.

[0045] In addition, in other optional embodiments, the number of conductors 130 included in any phase may also be three, four or other numbers, and accordingly, the number of wires included in the phase line 110 is set accordingly, which is not specifically limited in this embodiment.

[0046] Furthermore, in the present embodiment, the housing 210 includes a first shell 213 and a second shell 214, and the first shell 213 and the second shell 214 are spliced ​​to form the housing 210, that is, in the present embodiment, the housing 210 is assembled by the first shell 213 and the second shell 214, so as to facilitate the outer periphery of the junction of the phase line 110 and the conductor 130 of the stator winding 120 to be sleeved with the housing 210.

[0047] Moreover, when the housing 210 is installed, the joint between the phase line 110 and the conductor 130 can be bent first and fitted with the phase line 110 , and then the first shell 213 and the second shell 214 are buckled on the outer periphery of the joint between the phase line 110 and the conductor 130 .

[0048] Based on the above, this embodiment can first bend the joint between the phase line 110 and the conductor 130, so as to ensure that all parts of the joint between the phase line 110 and the conductor 130 can be buckled in the housing 210. Moreover, this embodiment can also reduce the volume of the housing 210, thereby saving the space occupied by the housing 210, and further facilitating the arrangement of other components of the motor.

[0049] Exemplarily, in this embodiment, one side of the first shell 213 is connected to the second shell 214 through a connecting plate 215, and a fold 2151 is provided on the connecting plate 215. The first shell 213 and the second shell 214 can rotate relative to or away from each other around the fold 2151, and have a first working position for snapping together to form the outer shell 210, and a second working position for unfolding. When the outer shell 210 is put on, the first shell 213 and the second shell 214 rotate relative to each other around the fold 2151, and switch from the second working position to the first working position, thereby wrapping the joint position of the phase line 110 and the conductor 130.

[0050] Moreover, a side of the first shell 213 away from the second shell 214 can be snapped together with a side of the second shell 214 away from the first shell 213, so that the first shell 213 and the second shell 214 are maintained in the first working position. Specifically, in this embodiment, a first snapping portion 2131 is provided on a side of the first shell 213 away from the second shell 214, and a second snapping portion 2141 is provided on a side of the second shell 214 away from the first shell 213. The first snapping portion 2131 and the second snapping portion 2141 can be snapped together, so that the first shell 213 and the second shell 214 are snapped together.

[0051] In other optional embodiments, the first shell 213 and the second shell 214 may also be rotatably connected by hinges or other methods, which is not specifically limited in this embodiment.

[0052] Furthermore, a hanging ear 217 is provided on the outer wall of the shell 210, and the shell 210 is fixedly connected to the stator by a cable tie 230 passing through the hanging ear 217. Specifically, the stator includes a mounting frame 140, and the stator winding 120 is installed on the mounting frame 140. The shell 210 is fixedly connected to the mounting frame 140 by a cable tie 230 passing through the hanging ear 217, thereby ensuring that the position of the shell 210 installed in the motor is fixed, and further ensuring that the position of the junction of the phase line 110 and the conductor 130 is fixed to prevent the junction of the phase line 110 and the conductor 130 from being damaged.

[0053] Based on the above, three housings 210 are provided in this embodiment, and the three housings 210 are fixed to the stator by a same cable tie 230 .

[0054] After the three shells 210 are fixed on the stator, glue is injected into the shell 210. Specifically, a glue injection hole 216 is provided on the shell 210. In this embodiment, sealant is injected into the shell 210 through the glue injection hole 216 provided on the shell 210 until the glue overflows, thereby ensuring that the periphery of the joint position of the phase line 110 and the conductor 130 is fully wrapped by the sealant.

[0055] Furthermore, a first glue guide plate 221 and a second glue guide plate 222 are respectively provided at both ends of the shell 210, and the first glue guide plate 221 and the second glue guide plate 222 are both located inside the shell 210, the first glue guide plate 221 is arranged close to the first perforation 211, and the second glue guide plate 222 is arranged close to the second perforation 212, the width of the first glue guide plate 221 gradually decreases from the side close to the first perforation 211 to the side away from the first perforation 211, and the width of the second glue guide plate 222 gradually decreases from the side close to the second perforation 212 to the side away from the second perforation 212, the first glue guide plate 221 and the second glue guide plate 222 can guide the sealant injected into the shell 210, thereby ensuring that the sealant can fill the entire inner cavity of the shell 210, and further ensuring that the periphery of the joint position of the phase line 110 and the conductor 130 is fully wrapped by the sealant.

[0056] Furthermore, the first glue guide plate 221 and the second glue guide plate 222 can also reduce the amount of sealant filled into the housing 210, thereby reducing the amount of sealant used.

[0057] It is worth noting that in this embodiment, a plurality of first rubber guide plates 221 and a plurality of second rubber guide plates 222 are respectively provided at both ends of the shell 210, and a plurality of first rubber guide plates 221 are arranged at intervals on the periphery of the first perforation 211, and a plurality of second rubber guide plates 222 are arranged at intervals on the periphery of the second perforation 212, thereby improving the flow guidance effect and further reducing the amount of sealant used.

[0058] In addition, it is worth mentioning that in this embodiment, the first perforation 211 and the second perforation 212 are both regular hexagonal holes. Of course, in other optional embodiments, the first perforation 211 and the second perforation 212 can also be square holes or round holes, etc., and this embodiment does not impose specific limitations on this.

[0059] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A sealing structure for a motor phase line, characterized in that: The invention comprises a shell (210), wherein the shell (210) is sleeved on the outer circumference of the joint between the phase line (110) and the conductor (130) of the stator winding (120), and the two ends of the shell (210) are respectively provided with a first through hole (211) and a second through hole (212), and the phase line (110) and the conductor (130) extend out of the shell (210) through the first through hole (211) and the second through hole (212), respectively, and the shell (210) is filled with sealant.

2. The sealing structure for motor phase line according to claim 1, characterized in that: The housing (210) comprises a first shell (213) and a second shell (214), and the first shell (213) and the second shell (214) are spliced ​​together to form the housing (210).

3. The sealing structure for motor phase line according to claim 2, characterized in that: One side of the first shell (213) is connected to the second shell (214) via a connecting plate (215), and a fold (2151) is provided on the connecting plate (215). The first shell (213) and the second shell (214) can rotate relative to or away from each other around the fold (2151), and have a first working position for buckling to form the outer shell (210), and a side of the first shell (213) away from the second shell (214) can be buckled with a side of the second shell (214) away from the first shell (213).

4. The sealing structure for motor phase line according to claim 1, characterized in that: The housing (210) is provided with a glue injection hole (216).

5. The sealing structure for motor phase line according to claim 1, characterized in that: A first rubber guide plate (221) and a second rubber guide plate (222) are respectively provided at two ends of the shell (210); the first rubber guide plate (221) and the second rubber guide plate (222) are both located inside the shell (210); the first rubber guide plate (221) is provided close to the first through hole (211); the second rubber guide plate (222) is provided close to the second through hole (212); the width of the first rubber guide plate (221) gradually decreases from a side close to the first through hole (211) to a side away from the first through hole (211); the width of the second rubber guide plate (222) gradually decreases from a side close to the second through hole (212) to a side away from the second through hole (212).

6. The sealing structure for motor phase line according to claim 1, characterized in that: A hanging ear (217) is provided on the outer wall of the shell (210), and the shell (210) is fixedly connected to the stator via a tie (230) passing through the hanging ear (217).

7. A method for sealing a motor phase line, characterized in that: include: A casing (210) is sheathed around the junction of the phase line (110) and the conductor (130) of the stator winding (120); A sealant is injected into the interior of the housing (210) and left to stand for a preset time.

8. The method for sealing a motor phase line according to claim 7, characterized in that: The housing (210) is formed by assembling a first housing (213) and a second housing (214); The junction of the phase line (110) and the conductor (130) is bent, and the first shell (213) and the second shell (214) are buckled on the outer periphery of the junction of the phase line (110) and the conductor (130).

9. The method for sealing a motor phase line according to claim 7, characterized in that: Sealant is injected into the interior of the outer shell (210) through a glue injection hole (216) provided on the outer shell (210) until the glue overflows.

10. The sealing method for motor phase line according to claim 7, characterized in that: The motor is provided with a plurality of the phase lines (110), and the outer peripheries of the joint positions of all the phase lines (110) are sleeved with the housing (210).

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