Motor structure

Abstract

The utility model discloses a motor structure, and relates to the technical field of motor manufacture, the motor structure comprises a main shaft, a motor assembly and an input gear, the main shaft comprises a gear box support shaft and a motor support shaft which are coaxially arranged, and the motor support shaft is connected with the gear box support shaft; the motor assembly comprises a stator core and a rotor assembly, the stator core is connected to the gear box supporting shaft, and the rotor assembly is connected to the motor supporting shaft; the stator iron core and the rotor assembly are located on the periphery of the motor supporting shaft. The input gear is connected to the end, away from the gear box supporting shaft, of the motor supporting shaft and clamped with the rotor assembly. According to the technical scheme of the utility model, the input gear is clamped with the rotor assembly, and the stator core and the rotor assembly are both located at the periphery of the motor support shaft, so that the axial length of the motor structure is shortened, and the motor structure is more compact, thereby enabling the motor structure to be applied to a narrow space.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor manufacturing technical field, especially a motor structure. BACKGROUND

[0002] Brushless motor is to use semiconductor switching device to realize electronic commutation, that is, to replace the traditional contact type commutator and brush with electronic switching device. Brushless motor has high reliability, no commutation spark, low mechanical noise and other advantages, and is widely used in high-grade recording seat, video recorder, electronic instrument and automated office equipment.

[0003] From the structure, brushless motor and brush motor have similarities, also have rotor and stator, only the structure is opposite with brush motor; the rotor of brush motor is coil winding, coil winding is connected with power output shaft, and the stator is permanent magnet, and the rotor of brushless motor is permanent magnet, and is connected with output shaft together with shell, and the stator is winding coil, and the commutating brush for alternating electromagnetic field of brush motor is removed.

[0004] At present, when brushless motor is connected with variable speed gear box, the one end of rotor is usually connected with output shaft, and the input gear of variable speed gear box is connected with the other end of output shaft, so that the motor structure formed after the setting occupies larger space, and is not suitable for some narrow space application scenarios. UTILITY MODEL CONTENTS

[0005] The main purpose of the utility model is to provide a motor structure, which aims to expand the application range of brushless motor.

[0006] In order to achieve the above purpose, the motor structure provided by the utility model comprises:

[0007] Main shaft, the main shaft includes coaxially arranged gear box support shaft and motor support shaft, the motor support shaft is connected to the gear box support shaft;

[0008] Motor assembly, the motor assembly includes stator core and rotor assembly, the stator core is connected to the gear box support shaft, and the rotor assembly is connected to the motor support shaft;The stator core and the rotor assembly are located at the outer periphery of the motor support shaft;And

[0009] Input gear, the input gear is connected to the one end of the motor support shaft away from the gear box support shaft, and is clamped with the rotor assembly.

[0010] In an embodiment, the rotor assembly includes permanent magnet and shell, the shell is connected to the motor support shaft, and is clamped with the input gear;The permanent magnet is connected to the inner wall of the shell.

[0011] In an embodiment, a plurality of clamping grooves are formed on the side of the housing facing the input gear, and a plurality of protrusions are formed on the outer periphery of the input gear, each of the protrusions clamping with the groove wall of one of the clamping grooves.

[0012] In an embodiment, the housing is further formed with a position-avoiding groove, and part of the structure of the input gear is located in the position-avoiding groove.

[0013] In an embodiment, the main shaft further comprises a bearing, the bearing is sleeved on the motor support shaft, and the stator core is connected to the outer periphery of the bearing.

[0014] In an embodiment, the motor structure further comprises a bracket assembly, the bracket assembly comprises a motor bracket, the motor bracket is connected to the gear box support shaft and is sleeved on the bearing, and the stator core is sleeved on the side of the motor bracket away from the bearing.

[0015] In an embodiment, the bracket assembly further comprises a gear box bracket, the gear box bracket is sleeved on the gear box support shaft, the motor bracket is connected to the gear box bracket, and the gear box bracket and the rotor assembly enclose a mounting cavity, the stator core and the bearing are located in the mounting cavity.

[0016] In an embodiment, the motor assembly further comprises a PCBA board, two ends of the PCBA board abut against the motor bracket and the gear box bracket respectively, the PCBA board is located in the mounting cavity, and the PCBA board is electrically connected with the stator core.

[0017] In an embodiment, the motor bracket is bent and formed with an abutting plane, and the abutting plane is attached to the side wall of the gear box bracket.

[0018] In an embodiment, the gear box support shaft is formed with a groove, and the motor support shaft is inserted into the groove.

[0019] The utility model discloses a motor structure, including main shaft, motor assembly and input gear, and the main shaft includes the gear box support shaft and motor support shaft of coaxial arrangement, and the motor support shaft is connected to the gear box support shaft, and the motor assembly includes stator core and rotor group, and the stator core is connected to the gear box support shaft, and the rotor group is connected to the motor support shaft, and the stator core and rotor group are all located the outer periphery of motor support shaft, and the input gear is connected to the one end of motor support shaft away from the gear box support shaft, and is connected with the rotor group. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawing needed to be used in the embodiment or prior art description, and obviously, the drawing in the following description is only some embodiments of the utility model, and for the ordinary skilled in the art, other drawings can be obtained according to the structure shown in these drawings without creative labor.

[0021] Figure 1 The structural diagram of the motor structure embodiment provided by the utility model is shown in the figure.

[0022] Figure 2 The structural diagram of the motor structure another embodiment provided by the utility model is shown in the figure.

[0023] Figure 3 For Figure 2 The sectional view along A-A.

[0024] Explanation of reference numerals:

[0025] Reference Name Reference Name 1000 Motor structure 222a Clamping groove 1 Main shaft 222b Avoiding slot 11 Gearbox support shaft 22a Mounting cavity 11a Groove 23 PCBA board 12 Motor support shaft 3 Input gear 13 Bearing 31 Projection 21 Stator core 41 Motor bracket 22 Rotor assembly 41a Butt joint plane 221 Permanent magnet 42 Gearbox bracket 222 Housing

[0026] The realization, functional characteristics and advantages of the utility model will be further explained by combining with the embodiment and referring to the drawings. DETAILED DESCRIPTION

[0027] The technical scheme in the embodiment of the utility model will be clearly and completely described by combining with the drawings in the embodiment of the utility model, and obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0028] It should be noted that if the embodiment of the utility model has the direction indication (such as up, down, left, right, front, back), the direction indication is only used to explain the relative position relationship, movement condition and the like between the components in a certain specific posture, if the specific posture changes, the direction indication also changes accordingly.

[0029] In addition, if the embodiment of the utility model has the description of "first", "second" and the like, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one feature. In addition, "and / or" or "and / or" appears in the whole text, which includes three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0030] The utility model provides a motor structure 1000.

[0031] Please refer to Figure 1 、 Figure 2 And Figure 3 In an embodiment of the utility model, the motor structure 1000 includes main shaft 1, motor assembly and input gear 3, main shaft 1 includes coaxially arranged gear box support shaft 11 and motor support shaft 12, and motor support shaft 12 is connected to gear box support shaft 11;Motor assembly includes stator core 21 and rotor group 22, stator core 21 is connected to gear box support shaft 11, and rotor group 22 is connected to motor support shaft 12;Stator core 21 and rotor group 22 are all located at the outer periphery of motor support shaft 12;Input gear 3 is connected to the end of motor support shaft 12 away from gear box support shaft 11 and is clamped with rotor group 22.

[0032] In the technical scheme of the utility model, input gear 3 is connected to motor support shaft 12 and is directly clamped with rotor group 22, and input gear 3 is driven to rotate by rotor group 22;Stator core 21 and rotor group 22 are all located at the outer periphery of motor support shaft 12, so that the length of motor structure 1000 in the axial direction can be shortened, so that motor structure 1000 is more compact, so that motor structure 1000 can be applied to narrow space, and the application range of brushless motor is expanded.

[0033] Please refer toFigure 3 In an embodiment of the present application, the rotor assembly 22 comprises a permanent magnet 221 and a shell 222, the shell 222 is connected to the motor support shaft 12 and is clamped with the input gear 3; the permanent magnet 221 is connected to the inner wall of the shell 222. The shell 222 can protect the permanent magnet 221 from damage or falling off during the operation of the motor, thereby improving the safety and reliability of the motor structure 1000.

[0034] It should be noted that the form of clamping of the shell 222 and the input gear 3 can be through buckle locking connection, or through the cooperation of the protrusions 31 and the clamping grooves 222a to realize clamping, which is not limited here.

[0035] The side of the shell 222 facing the input gear 3 is formed with a plurality of clamping grooves 222a, and the outer periphery of the input gear 3 is formed with a plurality of protrusions 31. Please refer to Figure 1 and Figure 3 In an embodiment of the present application, the side of the shell 222 facing the input gear 3 is formed with six clamping grooves 222a, and the outer periphery of the input gear 3 is formed with six protrusions 31, each protrusion 31 is clamped with the groove wall of a clamping groove 222a. By forming six clamping grooves 222a on the side of the shell 222 facing the input gear 3, and forming six protrusions 31 on the outer periphery of the input gear 3, each protrusion 31 is clamped with the groove wall of a clamping groove 222a, which can provide stable connection, thereby enhancing the durability and stability of the motor; the cooperation of the protrusions 31 and the clamping grooves 222a simplifies the assembly process, the user can quickly position and install the input gear 3, and the assembly time is reduced.

[0036] Please refer to Figure 1 and Figure 3 In an embodiment of the present application, the shell 222 further forms an avoiding slot 222b, and part of the structure of the input gear 3 is located in the avoiding slot 222b. By forming the avoiding slot 222b on the shell 222, part of the structure of the input gear 3 is located in the avoiding slot 222b, which can reduce the external size of the motor structure 1000, thereby reducing the overall volume of the motor structure 1000, so that the motor structure 1000 can be applied in a smaller space.

[0037] Please refer to Figure 3 In an embodiment of the present application, the main shaft 1 further comprises a bearing 13, the bearing 13 is sleeved on the motor support shaft 12, and the stator core 21 is connected to the outer periphery of the bearing 13. By connecting the motor support shaft 12 and the stator core 21 through the bearing 13, the rotation of the stator core 21 will not interfere with the motor support shaft 12, and the stator core 21 can be effectively supported, so that the motor structure 1000 is more stable as a whole, thereby effectively reducing the vibration and noise during the operation of the motor.

[0038] Referring to Figure 3 In an embodiment of the present application, the motor structure 1000 further comprises a bracket assembly, the bracket assembly comprising a motor bracket 41, the motor bracket 41 being connected to the gear box support shaft 11 and sleeved on the bearing 13; the stator core 21 being sleeved on the side of the motor bracket 41 away from the bearing 13. By connecting the motor bracket 41 to the gear box support shaft 11 and sleeving it on the bearing 13, and at the same time sleeving the stator core 21 on the side of the motor bracket 41 away from the bearing 13, the overall stability of the motor structure 1000 is improved, and displacement of components caused by vibration during long-term operation of the motor is avoided.

[0039] Referring to Figure 2 and Figure 3 In an embodiment of the present application, the bracket assembly further comprises a gear box bracket 42, the gear box bracket 42 being sleeved on the gear box support shaft 11, and the motor bracket 41 being connected to the gear box bracket 42; the gear box bracket 42 and the rotor assembly 22 enclose to form a mounting cavity 22a, and the stator core 21 and the bearing 13 are both located in the mounting cavity 22a. The mounting cavity 22a formed by the gear box bracket 42 and the rotor assembly 22, with the stator core 21 and the bearing 13 both located in the mounting cavity 22a, optimizes the spatial layout inside the motor structure 1000, improves the space utilization, further reduces the volume of the motor, and at the same time can protect the stator core 21 and the bearing 13; in addition, the gear box bracket 42 and the motor bracket 41 can provide additional support points for other components of the motor structure 1000, enhancing the stability of the motor structure 1000.

[0040] Referring to Figure 3 In an embodiment of the present application, the motor assembly further comprises a PCBA board, both ends of the PCBA board abutting against the motor bracket 41 and the gear box bracket 42 respectively, and the PCBA board being located in the mounting cavity 22a; the PCBA board being electrically connected with the stator core 21. Both ends of the PCBA board abutting against the motor bracket 41 and the gear box bracket 42 respectively and being located in the mounting cavity 22a, so that the electronic control part and the mechanical part of the motor are integrated together, so that the motor structure 1000 is more compact; the electrical connection design of the PCBA board and the stator core 21 simplifies the wiring and connection inside the motor, reduces the wiring space, and reduces the wiring complexity; both ends of the PCBA board being connected to the motor bracket 41 and the gear box bracket 42 respectively, which can provide support for the motor bracket 41 and the gear box bracket 42, thereby enhancing the stability of the motor structure 1000.

[0041] Referring to Figure 3In an embodiment of the present application, the motor support 41 is bent and formed with an abutting plane 41a; the abutting plane 41a is attached to the side wall of the gear box support 42. The motor support 41 is formed on the abutting plane 41a attached to the side wall of the gear box support 42, so that the contact area of the motor support 41 and the gear box support 42 is increased, and the larger contact area helps to more evenly distribute the load and reduce the vibration and noise caused by the operation of the motor structure 1000.

[0042] Please refer to Figure 3 In an embodiment of the present application, the gear box support shaft 11 is formed with a groove 11a, and the motor support shaft 12 is inserted into the groove 11a. The insertion design of the groove 11a and the motor support shaft 12 provides a mechanical locking mechanism, increases the stability of the connection, reduces the relative movement under high load or vibration conditions, and thus improves the stability of the entire motor system.

[0043] The above is only an exemplary embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation or direct / indirect application in other related technical fields within the technical concept of the present application is included in the patent protection scope of the present application.

Claims

1. An electric machine structure, characterized by The utility model provides a motor structure, comprising: a main shaft (1) comprising a gear box support shaft (11) and a motor support shaft (12) arranged coaxially, the motor support shaft (12) being connected to the gear box support shaft (11); a motor assembly comprising a stator core (21) and a rotor assembly (22), the stator core (21) being connected to the gear box support shaft (11), and the rotor assembly (22) being connected to the motor support shaft (12); the stator core (21) and the rotor assembly (22) are both located at the outer periphery of the motor support shaft (12); and an input gear (3) connected to the end of the motor support shaft (12) away from the gear box support shaft (11) and clamped with the rotor assembly (22).

2. The motor structure of claim 1, wherein The rotor assembly (22) comprises a permanent magnet (221) and a housing (222), the housing (222) being connected to the motor support shaft (12) and clamped with the input gear (3); the permanent magnet (221) is connected to the inner wall of the housing (222).

3. The motor structure of claim 2, wherein The side of the housing (222) facing the input gear (3) is formed with a plurality of clamping grooves (222a), and the outer periphery of the input gear (3) is formed with a plurality of protrusions (31), each of the protrusions (31) being clamped with the groove wall of one of the clamping grooves (222a).

4. The motor structure of claim 3, wherein The housing (222) is also formed with a position-avoiding groove (222b), and part of the structure of the input gear (3) is located in the position-avoiding groove (222b).

5. The motor structure of claim 1, wherein The main shaft (1) further comprises a bearing (13) sleeved on the motor support shaft (12), and the stator core (21) is connected to the outer periphery of the bearing (13).

6. The motor structure of claim 5, wherein The motor structure further comprises a bracket assembly, the bracket assembly comprising a motor bracket (41) connected to the gear box support shaft (11) and sleeved on the bearing (13); the stator core (21) is sleeved on the side of the motor bracket (41) away from the bearing (13).

7. The motor structure of claim 6, wherein The bracket assembly further comprises a gear box bracket (42) sleeved on the gear box support shaft (11), and the motor bracket (41) is connected to the gear box bracket (42); the gear box bracket (42) and the rotor assembly (22) form an installation cavity (22a) in a closed manner, and the stator core (21) and the bearing (13) are both located in the installation cavity (22a).

8. The motor structure of claim 7, wherein The motor assembly further comprises a PCBA board, both ends of the PCBA board abutting against the motor bracket (41) and the gear box bracket (42) respectively, the PCBA board being located in the installation cavity (22a); the PCBA board is electrically connected with the stator core (21).

9. The motor structure of claim 7, wherein The motor bracket (41) is arranged in a bent manner and is formed with an abutting plane (41a); the abutting plane (41a) is in contact with the side wall of the gear box bracket (42).

10. The motor structure of any one of claims 1 to 9, wherein, The gear case support shaft (11) is formed with a recess (11a) into which the motor support shaft (12) is inserted.

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