Connecting structure of lower casing and coil in motor

Abstract

The utility model discloses a connection structure of a lower casing and a coil in a motor, which comprises the lower casing and the coil, a wrapping table and a positioning boss are arranged on the upper end face of the lower casing, and the positioning boss is arranged close to the edge of the upper end face of the lower casing. Deformation grooves are formed in the positions, corresponding to the wrapping table and the positioning boss, of the lower end face of the lower machine shell respectively, the coil is wrapped on the wrapping table, and an embedding groove is formed in the position, on one side of the wrapping table, of the lower machine shell. The structure is simple, the connection and positioning of the coil are reliable, and the use effect is good.

Description

Technical Field

[0001] The utility model relates to a connection structure between a lower casing and a coil in a motor. Background Art

[0002] The motor is usually equipped with a coil, which is controlled by the circuit board. By alternately passing current in different directions, different magnetic field directions are alternately generated according to the principle of electromagnetism, thereby driving the reciprocating motion of the rotor assembly in the motor. Traditional coils are mostly fixed with clips or glue. Although they can meet the initial installation requirements, in a long-term high-frequency vibration environment, the clips are prone to deformation due to metal fatigue, and the glue will age and crack due to temperature changes, resulting in loosening and deflection between the coil and the iron core. This looseness will cause the coil magnetic field distribution to shift, causing the rotor assembly to be unevenly stressed, resulting in a decrease in the reciprocating motion accuracy of the rotor assembly and deviations in the structural output frequency. At the same time, the coil lead connectors are repeatedly stressed, which may cause false connections or broken wires, causing the motor to stop intermittently and increase the equipment failure rate. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a connection structure between a lower housing and a coil in a motor, which has a simple structure, reliable connection and positioning of the coil, and good use effect.

[0004] To achieve the above-mentioned purpose, the utility model provides a connection structure between the lower casing and the coil in the motor, including a lower casing and a coil, a winding platform and a positioning boss are provided on the upper end surface of the lower casing, the positioning boss is arranged close to the edge of the upper end surface of the lower casing, and deformation grooves are formed on the lower end surface of the lower casing corresponding to the positions of the winding platform and the positioning boss, respectively. The coil is wound on the winding platform, and an embedding groove is provided on one side of the winding platform on the lower casing.

[0005] The beneficial effect of this arrangement is that the setting of the wrapping table provides a precise physical positioning reference for the coil, and its cylindrical or stepped profile can form a close fit with the inner ring of the coil, avoiding the offset or looseness problems that occur during the traditional winding process. When the coil is wound, the wrapping table can limit its radial displacement. In conjunction with the deformation groove at the corresponding position on the lower end surface of the lower housing, it can absorb the thermal expansion stress of the coil during operation through a slight elastic deformation, preventing structural damage caused by rigid contact in a long-term high-temperature environment. The design of the embedded groove constructs an efficient connection channel between the circuit board and the coil. The size of its groove body matches the edge of the standard circuit board, which not only can quickly complete the card installation and positioning of the circuit board, but also guides the coil leads to be arranged in an orderly manner through the preset routing groove, reducing cross-interference during the wiring process; the layout of the positioning boss close to the edge of the upper end surface of the lower housing allows the boss to bear the impact load first during the drop test, dispersing the stress through its own structural deformation, and protecting the core components of the motor.

[0006] As a further configuration of the present invention, a clearance groove is provided on the upper end surface of the lower housing in the circumferential direction of the wrapping platform, and the clearance groove is communicated with the embedding groove.

[0007] The beneficial effect of this setting is that the coil terminal can be directly introduced into the circuit board in the embedded slot along the gap slot. The path is fixed and non-redundant, avoiding loosening of the terminal or wear of the lead due to shaking, while reducing signal interference caused by crossed wiring, further improving wiring stability and operational convenience.

[0008] As a further configuration of the present invention, the ratio of the height of the wrapping platform to the height of the coil is 0.7-1.5.

[0009] The beneficial effect of this arrangement is that it can stably support the coil through the lower structure to prevent radial deviation, while also leaving sufficient space above the coil. This prevents the winding platform from being too high to block the coil's magnetic field path, without affecting the electromagnetism efficiency.

[0010] As a further configuration of the present invention, there are two positioning bosses symmetrically distributed on both sides of the upper end surface of the lower housing.

[0011] The beneficial effect of this arrangement is that two positioning bosses are symmetrically distributed on both sides of the upper end surface of the lower housing, forming a balanced force-bearing support structure. In the event of a drop or vibration, the bosses on both sides can evenly share the impact force, preventing deformation of the housing due to excessive force on one side, effectively protecting the internal structure of the motor. It also reduces installation deviations caused by center of gravity offset. In addition, this design can enhance the overall structural rigidity of the housing, reduce the risk of warping during long-term use, and further ensure the stability of motor operation.

[0012] As a further configuration of the present invention, a cover plate is further provided on the coil.

[0013] This arrangement offers the following benefits: the cover plate provides a certain degree of compression on the coil, which, combined with the support of the winding table, further limits the coil's axial movement, reduces friction and collision between the coil and surrounding components during vibration, and maintains the stability of the coil structure. Preferably, the cover plate is made of a thermally conductive material to aid in heat dissipation from the coil, transferring heat more quickly to components such as the lower housing, thereby preventing localized overheating that could affect the coil's operating efficiency and service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the utility model;

[0015] Figure 2 This is a structural diagram of the lower housing in the first embodiment of the present utility model;

[0016] Figure 3This is a schematic cross-sectional view of the first embodiment of the present invention;

[0017] Figure 4 This is a schematic cross-sectional view of a second embodiment of the present invention;

[0018] Figure 5 This is a schematic structural diagram of the third embodiment of the present utility model;

[0019] Figure 6 This is a schematic cross-sectional view of a third embodiment of the present invention;

[0020] Figure 7 This is a schematic structural diagram of the fourth embodiment of the present utility model;

[0021] Figure 8 This is a schematic cross-sectional view of the fourth embodiment of the present invention. DETAILED DESCRIPTION

[0022] The utility model provides a first embodiment of a connection structure between a lower housing and a coil in a motor, such as Figures 1 to 3 As shown, the lower housing 1 includes a coil 4. The upper end surface of the lower housing 1 is provided with a wrapping platform 2 and a positioning boss 3. The positioning boss 3 is located near the edge of the upper end surface of the lower housing 1. Deformable grooves 12 are formed on the lower end surface of the lower housing 1 at positions corresponding to the wrapping platform 2 and the positioning boss 3, respectively. The coil 4 is wrapped around the wrapping platform 2. The lower housing 1 is provided with an inserting groove 11 on one side of the wrapping platform 2. This configuration has the beneficial effect of providing a precise physical positioning reference for the coil 4. Its cylindrical or stepped profile forms a tight fit with the inner turn of the coil 4, avoiding the offset or looseness problems that occur during traditional winding processes. After the coil 4 is wound, the wrapping platform 2 can limit its radial displacement. In conjunction with the corresponding deformation groove 12 on the lower end surface of the lower housing 1, it can absorb the thermal expansion stress of the coil 4 during operation through slight elastic deformation, preventing structural damage caused by rigid contact in long-term high-temperature environments. The design of the inserting groove 11 creates an efficient connection channel between the circuit board and the coil 4. The size of the slot body matches the edge of a standard circuit board, which not only enables the circuit board to be quickly installed and positioned, but also guides the coil 4 leads to be arranged in an orderly manner through the preset wiring grooves, reducing cross-interference during the wiring process; the positioning boss 3 is arranged close to the edge of the upper end surface of the lower housing 1. In a drop test, the boss can preferentially bear the impact load, disperse the stress through its own structural deformation, and protect the core components in the motor.

[0023] As a further feature of this embodiment, a clearance slot 21 is provided on the upper end surface of the lower housing 1, circumferentially around the wrapping platform 2. This clearance slot 21 communicates with the mounting slot 11. This arrangement advantageously allows the coil 4 terminals to be directly introduced into the circuit board within the mounting slot 11 along the clearance slot 21. This fixed and redundant path prevents loose terminals or lead wear due to shaking, reduces signal interference caused by crossed wiring, and further enhances wiring stability and ease of operation.

[0024] As a further feature of this embodiment, the ratio of the height of the winding platform 2 to the height of the coil 4 is 0.7. This arrangement has the beneficial effect of stably supporting the coil 4 through the lower structure to prevent radial displacement, while also leaving sufficient space above the coil 4. This prevents the winding platform 2 from being too high and blocking the magnetic field path of the coil 4, thus maintaining the electromagnetism efficiency.

[0025] The utility model provides a second embodiment of the connection structure between the lower housing and the coil of the motor, such as Figure 4 As shown, the lower housing 1 includes a coil 4. The upper end surface of the lower housing 1 is provided with a wrapping platform 2 and a positioning boss 3. The positioning boss 3 is located near the edge of the upper end surface of the lower housing 1. Deformable grooves 12 are formed on the lower end surface of the lower housing 1 at positions corresponding to the wrapping platform 2 and the positioning boss 3, respectively. The coil 4 is wrapped around the wrapping platform 2. The lower housing 1 is provided with an inserting groove 11 on one side of the wrapping platform 2. This configuration has the beneficial effect of providing a precise physical positioning reference for the coil 4. Its cylindrical or stepped profile forms a tight fit with the inner turn of the coil 4, avoiding the offset or looseness problems that occur during traditional winding processes. After the coil 4 is wound, the wrapping platform 2 can limit its radial displacement. In conjunction with the corresponding deformation groove 12 on the lower end surface of the lower housing 1, it can absorb the thermal expansion stress of the coil 4 during operation through slight elastic deformation, preventing structural damage caused by rigid contact in long-term high-temperature environments. The design of the inserting groove 11 creates an efficient connection channel between the circuit board and the coil 4. The size of the slot body matches the edge of a standard circuit board, which not only enables the circuit board to be quickly installed and positioned, but also guides the coil 4 leads to be arranged in an orderly manner through the preset wiring grooves, reducing cross-interference during the wiring process; the positioning boss 3 is arranged close to the edge of the upper end surface of the lower housing 1. In a drop test, the boss can preferentially bear the impact load, disperse the stress through its own structural deformation, and protect the core components in the motor.

[0026] As a further feature of this embodiment, a clearance slot 21 is provided on the upper end surface of the lower housing 1, circumferentially around the wrapping platform 2. This clearance slot 21 communicates with the mounting slot 11. This arrangement advantageously allows the coil 4 terminals to be directly introduced into the circuit board within the mounting slot 11 along the clearance slot 21. This fixed and redundant path prevents loose terminals or lead wear due to shaking, reduces signal interference caused by crossed wiring, and further enhances wiring stability and ease of operation.

[0027] As a further feature of this embodiment, the ratio of the height of the winding platform 2 to the height of the coil 4 is 1. This arrangement has the beneficial effect of stably supporting the coil 4 through the lower structure to prevent radial displacement, while also leaving sufficient space above the coil 4. This prevents the winding platform 2 from being too high and blocking the magnetic field path of the coil 4, thereby maintaining the electromagnetism efficiency.

[0028] The utility model provides a third embodiment of the connection structure between the lower housing and the coil of a motor, such as Figure 5 and Figure 6 As shown, the lower housing 1 includes a coil 4. The upper end surface of the lower housing 1 is provided with a wrapping platform 2 and a positioning boss 3. The positioning boss 3 is located near the edge of the upper end surface of the lower housing 1. Deformable grooves 12 are formed on the lower end surface of the lower housing 1 at positions corresponding to the wrapping platform 2 and the positioning boss 3, respectively. The coil 4 is wrapped around the wrapping platform 2. The lower housing 1 is provided with an inserting groove 11 on one side of the wrapping platform 2. This configuration has the beneficial effect of providing a precise physical positioning reference for the coil 4. Its cylindrical or stepped profile forms a tight fit with the inner turn of the coil 4, avoiding the offset or looseness problems that occur during traditional winding processes. After the coil 4 is wound, the wrapping platform 2 can limit its radial displacement. In conjunction with the corresponding deformation groove 12 on the lower end surface of the lower housing 1, it can absorb the thermal expansion stress of the coil 4 during operation through slight elastic deformation, preventing structural damage caused by rigid contact in long-term high-temperature environments. The design of the inserting groove 11 creates an efficient connection channel between the circuit board and the coil 4. The size of the slot body matches the edge of a standard circuit board, which not only enables the circuit board to be quickly installed and positioned, but also guides the coil 4 leads to be arranged in an orderly manner through the preset wiring grooves, reducing cross-interference during the wiring process; the positioning boss 3 is arranged close to the edge of the upper end surface of the lower housing 1. In a drop test, the boss can preferentially bear the impact load, disperse the stress through its own structural deformation, and protect the core components in the motor.

[0029] As a further feature of this embodiment, a clearance slot 21 is provided on the upper end surface of the lower housing 1, circumferentially around the wrapping platform 2. This clearance slot 21 communicates with the mounting slot 11. This arrangement advantageously allows the coil 4 terminals to be directly introduced into the circuit board within the mounting slot 11 along the clearance slot 21. This fixed and redundant path prevents loose terminals or lead wear due to shaking, reduces signal interference caused by crossed wiring, and further enhances wiring stability and ease of operation.

[0030] As a further feature of this embodiment, the ratio of the height of the winding platform 2 to the height of the coil 4 is 1.5. This arrangement has the beneficial effect of stably supporting the coil 4 through the lower structure to prevent radial displacement, while also leaving sufficient space above the coil 4. This prevents the winding platform 2 from being too high and blocking the magnetic field path of the coil 4, thus maintaining the electromagnetism efficiency.

[0031] As a further arrangement of this embodiment, there are two positioning bosses 3 symmetrically distributed on both sides of the upper end surface of the lower housing 1. The beneficial effect of this arrangement is that, with this arrangement, there are two positioning bosses 3 symmetrically distributed on both sides of the upper end surface of the lower housing 1, which can form a balanced force-supporting structure. In a falling or vibration scenario, the bosses on both sides can evenly share the impact force, avoid deformation of the shell caused by excessive force on one side, and effectively protect the internal structure of the motor. Reduce installation deviations caused by center of gravity shift. In addition, this design can also enhance the overall structural rigidity of the shell, reduce the risk of warping during long-term use, and further ensure the stability of the motor operation.

[0032] The utility model provides a fourth embodiment of the connection structure between the lower housing and the coil of a motor, such as Figure 7 and Figure 8As shown, the lower housing 1 includes a coil 4. The upper end surface of the lower housing 1 is provided with a wrapping platform 2 and a positioning boss 3. The positioning boss 3 is located near the edge of the upper end surface of the lower housing 1. Deformable grooves 12 are formed on the lower end surface of the lower housing 1 at positions corresponding to the wrapping platform 2 and the positioning boss 3, respectively. The coil 4 is wrapped around the wrapping platform 2. The lower housing 1 is provided with an inserting groove 11 on one side of the wrapping platform 2. This configuration has the beneficial effect of providing a precise physical positioning reference for the coil 4. Its cylindrical or stepped profile forms a tight fit with the inner turn of the coil 4, avoiding the offset or looseness problems that occur during traditional winding processes. After the coil 4 is wound, the wrapping platform 2 can limit its radial displacement. In conjunction with the corresponding deformation groove 12 on the lower end surface of the lower housing 1, it can absorb the thermal expansion stress of the coil 4 during operation through slight elastic deformation, preventing structural damage caused by rigid contact in long-term high-temperature environments. The design of the inserting groove 11 creates an efficient connection channel between the circuit board and the coil 4. The size of the slot body matches the edge of a standard circuit board, which not only enables the circuit board to be quickly installed and positioned, but also guides the coil 4 leads to be arranged in an orderly manner through the preset wiring grooves, reducing cross-interference during the wiring process; the positioning boss 3 is arranged close to the edge of the upper end surface of the lower housing 1. In a drop test, the boss can preferentially bear the impact load, disperse the stress through its own structural deformation, and protect the core components in the motor.

[0033] As a further feature of this embodiment, a clearance slot 21 is provided on the upper end surface of the lower housing 1, circumferentially around the wrapping platform 2. This clearance slot 21 communicates with the mounting slot 11. This arrangement advantageously allows the coil 4 terminals to be directly introduced into the circuit board within the mounting slot 11 along the clearance slot 21. This fixed and redundant path prevents loose terminals or lead wear due to shaking, reduces signal interference caused by crossed wiring, and further enhances wiring stability and ease of operation.

[0034] As a further feature of this embodiment, the ratio of the height of the winding platform 2 to the height of the coil 4 is 1.5. This arrangement has the beneficial effect of stably supporting the coil 4 through the lower structure to prevent radial displacement, while also leaving sufficient space above the coil 4. This prevents the winding platform 2 from being too high and blocking the magnetic field path of the coil 4, thus maintaining the electromagnetism efficiency.

[0035] As a further feature of this embodiment, a cover plate 5 is also provided on the coil 4. This advantageously provides a certain degree of compression on the coil 4. This, combined with the support provided by the wrapping platform 2, further limits axial movement of the coil 4, reduces friction and collision between the coil 4 and surrounding components during vibration, and maintains the structural stability of the coil 4. Preferably, the cover plate 5 is made of a thermally conductive material to aid in heat dissipation from the coil 4, transferring heat more quickly to components such as the lower housing 1, thereby preventing localized overheating of the coil 4 from impacting its operating efficiency and service life.

[0036] The above example is only one preferred specific example of the present invention. Common changes and substitutions made by those skilled in the art within the scope of the technical solution of the present invention are all included in the protection scope of the present invention.

Claims

1. A connection structure between a lower housing and a coil in a motor, comprising a lower housing and a coil, characterized in that: A winding platform and a positioning boss are provided on the upper end surface of the lower shell. The positioning boss is arranged close to the edge of the upper end surface of the lower shell. Deformation grooves are formed on the lower end surface of the lower shell corresponding to the positions of the winding platform and the positioning boss. The coil is wound on the winding platform, and an embedding groove is provided on one side of the winding platform on the lower shell.

2. The connection structure between the lower housing and the coil of the motor according to claim 1, characterized in that: A clearance groove is provided on the upper end surface of the lower housing in the circumferential direction of the wrapping platform, and the clearance groove is communicated with the embedding groove.

3. The connection structure between the lower housing and the coil of the motor according to claim 1, characterized in that: The ratio of the winding platform height to the coil height is 0.7-1.

5.

4. The connection structure between the lower housing and the coil of the motor according to claim 1, characterized in that: There are two positioning bosses symmetrically distributed on both sides of the upper end surface of the lower casing.

5. The connection structure between the lower housing and the coil of the motor according to claim 1, characterized in that: A cover plate is also provided on the coil.

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