Insulated motor

Abstract

The utility model discloses an insulation motor, comprising a gear box and a motor installed on the gear box, the gear box is made of an insulation material, and the gear box and the motor are connected to form a first insulation structure; a gear set is arranged in the gear box and comprises an input gear connected with the output end of the motor, the input gear is made of insulation materials, and the input gear is connected with the output end of the motor to form a second insulation structure. According to the insulation motor, two groups of insulation structures are formed through the gearbox and the input gear which are made of insulation materials, a current transmission line is cut off, and the insulation effect is ensured.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to an insulated motor. Background Technology

[0002] Stepper motors, as small motors, are essential basic products widely used in various fields such as factory automation, home automation, and office automation. Existing stepper motor gearboxes of the same type are generally zinc alloy metal gearboxes, and the gears are also metal gears. The insulation resistance of the entire machine is usually less than 100MΩ (test conditions: DC 500V), indicating poor insulation and a susceptibility to leakage faults in humid and hot environments. Furthermore, the noise generated after prolonged operation is also relatively high. For working environments requiring low noise and high insulation (such as industrial automation equipment, precision instruments, and household appliances), existing designs are insufficient to meet the requirements. Utility Model Content

[0003] The technical problem to be solved by this utility model is: in order to solve the technical problem of poor insulation performance of motors in the prior art, this utility model provides an insulated motor, which forms two sets of insulation structures through an insulated gearbox and an input gear, thereby cutting off the current transmission path and ensuring the insulation effect.

[0004] The technical solution adopted by this utility model to solve its technical problem is: an insulated motor, including a gearbox and a motor mounted on the gearbox, wherein the gearbox is made of insulating material, and the gearbox and the motor are connected to form a first insulating structure; the gearbox is provided with a gear set, the gear set including an input gear connected to the output end of the motor, the input gear is made of insulating material, and the input gear and the output end of the motor are connected to form a second insulating structure.

[0005] This utility model relates to an insulated motor. When the motor leaks current, the insulated gearbox can prevent external leakage, while the insulated input gear prevents internal leakage, thus cutting off the current transmission path and improving the overall insulation of the machine.

[0006] Furthermore, to improve insulation, the gearbox includes a housing and a cover, both of which are made of insulating material. The cover, housing, and motor are connected by screws to form a first insulating structure.

[0007] Furthermore, in order to achieve a fixed installation between the housing and the motor, the housing has a central mounting hole and a side mounting hole, and the motor has a central boss and a side boss. The motor is assembled with the housing such that the central boss is inserted into the central mounting hole and the side boss is inserted into the side mounting hole.

[0008] Furthermore, in order to reduce the risk of input gear slippage and improve power transmission efficiency, the input gear has a single flat mounting part, which is connected to the motor output end to form a second insulation structure.

[0009] Furthermore, in order to optimize the insulation effect of the gear set, the gear set also includes an output gear, which is made of insulating material.

[0010] Furthermore, in order to further improve the insulation effect of the gear set, the gear set also includes an intermediate gear, and the input gear, intermediate gear and output gear mesh in sequence, wherein the intermediate gear is made of insulating material.

[0011] Furthermore, in order to improve the stability of the motor and reduce the noise generated during motor operation, a fixing plate is provided between the housing and the cover, and the fixing plate is connected to the housing through a circumferential limiting structure.

[0012] Furthermore, in order to circumferentially limit the fixing plate and ensure the coaxiality of the fixing plate and the shell, the circumferential limiting structure includes shell grooves on the left and right sides of the shell end face, positioning posts inside the shell grooves, and shell protrusions at the bottom of the shell end face. The fixing plate protrusions on both sides of the fixing plate engage with the shell grooves, the positioning holes on the fixing plate engage with the positioning posts, and the fixing plate grooves of the fixing plate engage with the shell protrusions.

[0013] Furthermore, in order to ensure the operational stability of the output shaft assembly, the output gear and the output shaft assembly are mounted on the upper end face of the fixed plate, and the intermediate gear is mounted on the lower end face of the fixed plate.

[0014] Furthermore, in order to prevent the nut from falling off the cover during use, the cover contains a nut, the cover and the nut are integrally injection molded, and the nut is connected to an external fastener.

[0015] Furthermore, in order to reduce the radial wobble of the output shaft assembly, the housing cover has a bearing mounting hole in the middle, a bearing is interference-fitted into the bearing mounting hole, the inner wall of the bearing is connected to the output shaft assembly, and the output shaft assembly is connected to the output gear of the gear set.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. The insulated motor of this utility model has a housing directly connected to the motor made of insulating material. The housing cuts off the leakage current of the motor, effectively avoiding external leakage of the motor and improving the safety of the motor.

[0018] 2. In this utility model of an insulated motor, the input gear directly connected to the motor is made of insulating material. The input gear cuts off the leakage current at the motor input end, effectively preventing internal leakage and improving motor safety.

[0019] 3. The insulated motor of this utility model, under the premise of meeting the transmission strength, can make all the other gears in the gear set use insulating materials, further improving the insulation of the whole machine and making it have high voltage resistance performance.

[0020] 4. In this utility model of insulated motor, the housing limits and fixes the fixing plate circumferentially, ensuring the coaxiality of the fixing plate and the housing plane, reducing vibration during the operation of the whole machine, improving the stability of the whole machine operation, and locking the fixing plate axially with screws to ensure the reliability of the fixation and prevent the fixing plate from loosening during the operation of the whole machine.

[0021] 5. In this utility model of insulated motor, the nut and the housing cover are integrally injection molded, which improves the integration of the housing cover and prevents the nut from falling off during use.

[0022] 6. The insulated motor bearing and housing cover of this utility model adopt an interference fit to ensure the relative installation position of the bearing and housing cover, reduce assembly errors, reduce radial wobble of the output shaft assembly, reduce wear of the output shaft assembly, reduce overall noise, and improve the durability of the whole machine. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a schematic diagram of the structure of the insulated motor of this utility model;

[0025] Figure 2 This is an exploded view of an insulated motor.

[0026] Figure 3 This is a schematic diagram of the three-dimensional structure of the motor;

[0027] Figure 4 A three-dimensional structural diagram of the input / output wheel;

[0028] Figure 5 This is a schematic diagram of the three-dimensional structure of the shell;

[0029] Figure 6 for Figure 8 A bottom view;

[0030] Figure 7 This is a structural diagram of the fixed plate;

[0031] Figure 8 This is a cross-sectional view of the shell cover;

[0032] In the diagram: 1. Motor, 11. Central boss, 12. Side boss, 13. Output end;

[0033] 2. Housing; 21. Central mounting hole; 22. Side mounting hole; 23. Housing groove; 24. Positioning post; 25. Housing protrusion.

[0034] 3. Shell cover; 31. Nut; 32. Bearing mounting hole; 33. Bearing;

[0035] 4. Gear set; 41. Input gear; 411. Single flat mounting part; 42. Output gear; 43. Intermediate gear.

[0036] 5. Fixing plate; 51. Fixing plate protrusion; 52. Positioning hole; 53. Fixing plate groove;

[0037] 6. Output shaft assembly;

[0038] 7. Screws. Detailed Implementation

[0039] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0040] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0042] Example 1, such as Figure 1 and Figure 2 As shown, an insulated motor includes a gearbox and a motor 1 mounted on the gearbox.

[0043] Specifically, the gearbox is made of insulating material, and the gearbox is connected to the motor 1 to form a first insulating structure. Preferably, the gearbox includes a housing 2 and a cover 3, both of which are made of insulating material. The cover 3, the housing 2, and the motor 1 are connected by screws 7, thereby forming the first insulating structure.

[0044] Specifically, housing 2 and cover 3 are made of plastic, preferably PBT G30, which has good insulation and sound insulation properties. Because housing 2 and cover 3 are made of highly insulating material, direct contact between the metal casing of motor 1 and the metal parts of gearbox can be avoided, preventing leakage of current from housing 2 and cover 3 and cutting off the external flow of current.

[0045] Specifically, the gearbox contains a gear set 4, which includes an input gear 41 connected to the output terminal 13 of the motor 1. The input gear 41 is made of insulating material, and its connection to the output terminal 13 of the motor 1 forms a second insulating structure. Preferably, the input gear 41 is made of nylon PA66, which has the advantages of high insulation and low vibration and noise during gear meshing. This prevents current from being transmitted from the output terminal 13 of the motor 1 to the input gear 41, thus cutting off the internal current flow.

[0046] In Example 2, based on Example 1, the housing 2 has a central mounting hole 21 and a side mounting hole 22. The upper end face of the motor 1 has a central boss 11 and a side boss 12. The motor 1 is assembled with the housing 2 such that the central boss 11 is inserted into the central mounting hole 21 and the side boss 12 is inserted into the side mounting hole 22. The housing 2 has a cylindrical shape. By assembling the above-mentioned components accordingly, the central boss 11 and the central mounting hole 21, as well as the side mounting hole 22 and the side boss 12, achieve circumferential positioning. After the motor 1 and the housing 2 are aligned and assembled, the side boss 12 will protrude from the side mounting hole 22. The screw 7 passes through the cover 3, the fixing plate 5, and the housing 2 in sequence and is screwed into the threaded hole of the side boss 12, thereby connecting the above-mentioned components into a whole.

[0047] In Example 3, based on Example 1, the input gear 41 has a single flat mounting part 411, which is fixedly connected to the output end 13 of the motor 1, thereby forming a second insulation structure. This connection method reduces the risk of gear slippage and further improves power transmission efficiency.

[0048] In Example 4, based on Example 3, the gear set 4 further includes an output gear 42, which is made of insulating material. The gear set 4 also includes an intermediate gear 43. The input gear 41, intermediate gear 43, and output gear 42 mesh sequentially. The intermediate gear 43 is also made of insulating material. The input gear 41 is riveted to the output end 13 of the motor 1 by external force and meshes with the intermediate gear 43. Both the intermediate gear 43 and the output gear 42 can be made of PA material, within the condition of meeting the overall transmission strength requirements, which can further improve the insulation of the entire machine and provide good high-voltage resistance.

[0049] Specifically, input gear 41 is the first gear, intermediate gear 43 is the second, third and fourth gears, and output gear 42 is the fifth gear.

[0050] In Example 5, based on Example 4, a fixing plate 5 is provided between the housing 2 and the cover 3. The output gear 42 and the output shaft assembly 6 are mounted on the upper end face of the fixing plate 5, and the intermediate gear 43 is mounted on the lower end face of the fixing plate 5. The fixing plate 5 and the housing 2 are connected by a circumferential limiting structure. The circumferential limiting structure includes housing grooves 23 on the left and right sides of the end face of the housing 2, positioning pins 24 inside the housing grooves 23, and housing protrusions 25 at the bottom of the end face of the housing 2. The fixing plate protrusions 51 on both sides of the fixing plate 5 engage with the housing grooves 23, the positioning holes 52 on the fixing plate 5 engage with the positioning pins 24, and the fixing plate grooves 53 of the fixing plate 5 engage with the housing protrusions 25. When the fixing plate 5 and the housing 2 are assembled, the fixing plate 5 is engaged with the protrusion 51 of the fixing plate through the groove of the housing, and the fixing plate 53 is engaged with the protrusion 25 of the housing. The fixing plate 5 is circumferentially fixed from the left and right ends and the bottom end. At the same time, the positioning pin 24 and the positioning hole 52 are used for auxiliary positioning. This structure can ensure the coaxiality of the fixing plate 5 and the plane of the housing 2, reduce the vibration during the operation of the whole machine, and improve the stability of the whole machine operation. The fixing plate 5 is clamped by the housing 2 and the housing cover 3 to form the structure of housing 2-fixing plate 5-housing cover 3. Screws 7 are used to lock the three to the motor 1 to prevent the fixing plate 5 from tilting or shaking inside the gearbox. The fastening method can provide uniform pressure distribution, ensure the reliability of the fixation, and prevent the fixing plate 5 from loosening during the operation of the whole machine.

[0051] In Example 6, based on Example 1, the housing cover 3 has a nut 31 inside. The housing cover 3 and the nut 31 are integrally injection molded, and the nut 31 is connected to an external fastener. An injection molding process is used to inject the nut 31 into the housing cover 3. The injection-molded body of the housing cover 3 fully wraps around the outer ring of the nut 31, significantly improving the bonding strength between the nut 31 and the housing cover 3 (pull-out force ≥ 8 N·m). The nut 31 is tightly connected to the housing cover 3 and is not easily detached, thereby improving the stability of the motor 1's operation.

[0052] In Example 7, based on Example 6, the housing cover 3 has a bearing mounting hole 32 in the middle. A bearing 33 is interference-fitted into the bearing mounting hole 32, and an output shaft assembly 6 is connected to the inner wall of the bearing 33. The output shaft assembly 6 is connected to the output gear 42. The outer wall of the bearing 33 is interference-fitted with the bearing mounting hole 32 of the housing cover 3, and the inner wall of the bearing 33 fits with the output shaft assembly 6, providing support. This bearing 33 is an oil-impregnated bearing with its own lubricating grease, which allows for self-lubrication when it fits with the output shaft assembly 6.

[0053] The bearing 33 and the housing cover 3 are tightly connected by riveting. Since the two are assembled by interference fit, the bearing 33 is not easy to fall off even when the whole machine is running at high speed. The radial clearance of the bearing after assembly can be controlled (≤0.05mm), which can reduce the radial wobble of the output shaft assembly 6, reduce the wear of the output shaft assembly 6, reduce the noise of the whole machine, and improve the stability of the motor 1.

[0054] In summary, the insulated motor of this utility model forms two sets of insulating structures through the gearbox made of insulating material and the input gear 41, which cut off the current transmission path and ensures the insulation effect.

[0055] The above description is based on the preferred embodiments of this utility model. Through the above description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined by the scope of the claims.

Claims

1. An insulated motor, comprising a gearbox and a motor (1) mounted on the gearbox, characterized in that... : The gearbox is made of insulating material, and the gearbox is connected to the motor (1) to form a first insulating structure; The gearbox is provided with a gear set (4), which includes an input gear (41) connected to the output end (13) of the motor (1). The input gear (41) is made of insulating material and is connected to the output end (13) of the motor (1) to form a second insulating structure.

2. The insulated motor according to claim 1, characterized in that, The gearbox includes a housing (2) and a cover (3), both of which are made of insulating material. The cover (3), housing (2), and motor (1) are connected by screws (7) to form a first insulating structure.

3. The insulated motor according to claim 2, characterized in that, The housing (2) has a central mounting hole (21) and a side mounting hole (22), and the motor (1) has a central boss (11) and a side boss (12). The motor (1) is assembled with the housing (2) such that the central boss (11) is inserted into the central mounting hole (21) and the side boss (12) is inserted into the side mounting hole (22).

4. The insulated motor according to claim 1, characterized in that, The input gear (41) has a single flat mounting part (411), which is connected to the output end (13) of the motor (1) to form a second insulation structure.

5. The insulated motor according to claim 4, characterized in that, The gear set (4) also includes an output gear (42), which is made of insulating material.

6. The insulated motor according to claim 5, characterized in that, The gear set (4) also includes an intermediate gear (43), and the input gear (41), intermediate gear and output gear (42) mesh in sequence. The intermediate gear is made of insulating material.

7. The insulated motor according to claim 2, characterized in that, A fixing plate (5) is provided between the shell (2) and the cover (3), and the fixing plate (5) is connected to the shell (2) by a circumferential limiting structure.

8. The insulated motor according to claim 7, characterized in that, The circumferential limiting structure includes a housing groove (23) on the left and right sides of the end face of the housing (2), a positioning post (24) inside the housing groove (23), and a housing protrusion (25) at the bottom of the end face of the housing (2). The fixing plate protrusions (51) on both sides of the fixing plate (5) are engaged with the housing groove (23), the positioning hole (52) on the fixing plate (5) is engaged with the positioning post (24), and the fixing plate groove (53) of the fixing plate (5) is engaged with the housing protrusion (25).

9. The insulated motor according to claim 6, characterized in that, The output gear (42) and output shaft assembly (6) are mounted on the upper end face of the fixed plate (5), and the intermediate gear (43) is mounted on the lower end face of the fixed plate (5).

10. The insulated motor according to claim 2, characterized in that, The cover (3) has a nut (31) inside. The cover (3) and the nut (31) are integrally injection molded. The nut (31) is connected to an external fastener.

11. The insulated motor according to claim 10, characterized in that, The cover (3) has a bearing mounting hole (32) in the middle, and a bearing (33) is interference-fitted into the bearing mounting hole (32). An output shaft assembly (6) is connected to the inner wall of the bearing (33), and the output shaft assembly (6) is connected to the output gear (42) of the gear set (4).

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