Motor shaft limiting structure of gearbox

Abstract

The utility model discloses a gearbox's motor shaft limiting structure, including shell, motor, speed reduction transmission subassembly and output shaft, be provided with the accommodation space in the shell, and motor and speed reduction transmission subassembly all place on the accommodation space, and the motor shaft of motor is engaged with speed reduction transmission subassembly, and output shaft is connected with speed reduction transmission subassembly and the output shaft one end extends the shell, its characterized is, still including the limiting piece, be provided with the limiting space on the limiting piece, and the limiting piece is connected on the shell and the motor shaft one end extends into the limiting space, this gearbox's motor shaft limiting structure, through adding the limiting piece, the limiting space on the limiting piece plays the limiting effect to the motor shaft, can the motor shaft swing of good restriction, guarantees the engagement transmission stability of motor shaft and speed reduction transmission subassembly, is favorable to the improvement product life and reduces the noise.

Description

Technical Field

[0001] This utility model relates to the field of gearbox technology, and in particular to a motor shaft limiting structure for a gearbox. Background Technology

[0002] Existing gearbox structures, such as the reduction gearbox of a juicer, are illustrated in Chinese Utility Model Patent No. 2020217152996, entitled "A Large-Diameter Portable Juicer," authorized on June 8, 2021. This patent includes a main unit and a juicing assembly. The main unit contains a drive mechanism and a longitudinally extending feed channel. The juicing assembly is located below the main unit. The drive mechanism includes a motor body with a motor shaft and a transmission mechanism connected to the motor shaft. The transmission mechanism includes an output shaft. The motor body is eccentrically positioned relative to the output shaft and away from the feed channel. This design ensures that changes in the motor body's size do not affect the size of the feed channel. Specifically, with the same outer diameter of the main unit, eccentrically positioning the motor body relative to the output shaft allows for a larger feed channel without interference from the motor body. This enables a large-diameter feed in the portable juicer, facilitating user input without requiring material to be cut into small pieces. After cleaning, the material can be directly fed into the feed channel for juicing, significantly improving the user experience and increasing user satisfaction.

[0003] The aforementioned transmission mechanism includes a primary worm gear connected to the motor shaft, a primary worm wheel cooperating with the primary worm gear, a secondary worm gear connected to the primary worm wheel, and a secondary worm wheel cooperating with the secondary worm gear. The output shaft is connected to the secondary worm wheel, and the output shaft passes through the central hole of the secondary worm wheel and is fixed to the central hole through an interference key connection, so as to realize the rotation of the secondary worm wheel to drive the output shaft to rotate.

[0004] However, the transmission mechanism of the above structure still has the following shortcomings: (1) The first-stage worm is directly connected to the motor shaft. When the first-stage worm meshes with the first-stage turbine, the interaction force between the two causes the motor shaft and the first-stage worm on it to swing, which will affect the transmission effect. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a motor shaft limiting structure for a gearbox that adds a limiting component to restrict the swing of the motor shaft.

[0006] The purpose of this utility model is achieved as follows: A motor shaft limiting structure for a gearbox includes a housing, a motor, a reduction gear assembly, and an output shaft. The housing has a mounting space where the motor and reduction gear assembly are placed. The motor shaft meshes with the reduction gear assembly, and the output shaft is connected to the reduction gear assembly with one end extending out of the housing. The structure further includes a limiting member with a limiting space. The limiting member is connected to the housing, and one end of the motor shaft extends into the limiting space. This motor shaft limiting structure, by adding a limiting member, allows the limiting space on the limiting member to limit the motor shaft, effectively restricting its oscillation and ensuring stable meshing and transmission between the motor shaft and the reduction gear assembly. This improves product lifespan and reduces noise.

[0007] The objective of this utility model can also be achieved by the following technical measures: Specifically, the limiting component is a limiting frame, one end of the outer shell is provided with an opening, the limiting frame is connected to the opening, the limiting frame is provided with a limiting hole, the limiting hole constitutes the limiting space, and one end of the motor shaft extends into the limiting hole; the structure of the limiting frame and the limiting hole is simple, and the limiting hole can also effectively limit the motor shaft, thus achieving the purpose of this patent.

[0008] Specifically, the limiting frame is cross-shaped, with the limiting hole at its center and locking holes at all four ends. Four protruding buckles are provided on the outer shell corresponding to the four locking holes, and the buckles engage with the locking holes to ensure a secure connection between the limiting frame and the outer shell, which is beneficial for the stable limiting of the motor shaft by the limiting hole.

[0009] Specifically, four recesses are provided on the outer shell corresponding to the four protruding buckle positions on the outer periphery of the opening, and the protruding buckles are located on one side of the recesses. The four ends of the limiting frame extend into the corresponding recesses respectively. The recesses can limit the installation of the limiting frame, making it convenient for the limiting frame to be installed on the outer shell.

[0010] Specifically, the limiting component includes an upper limiting seat and a lower limiting seat. The outer shell includes a connected base and an upper shell. The base is provided with a first groove, and the upper shell is provided with a second groove. The first groove and the second groove form the placement space. The lower limiting seat is placed in the first groove, and the upper limiting seat is placed in the second groove. The upper limiting seat has an upper limiting recess, and the lower limiting seat has a lower limiting recess. The lower limiting recess and the upper limiting recess form the limiting space. The limiting space formed by the upper and lower limiting seats can also effectively limit the motor shaft, that is, it can effectively achieve the purpose of this patent.

[0011] Furthermore, the lower limit seat is also provided with a positioning recess, and the upper limit seat is provided with a positioning protrusion at the position corresponding to the positioning recess, the positioning protrusion extending into the positioning recess; through the cooperation of the positioning protrusion and the positioning recess, the installation between the upper limit seat and the lower limit seat is well positioned, so that the upper limit positioning recess can be directly aligned with the lower limit positioning recess, ensuring that the upper limit positioning recess and the lower limit positioning recess can form a limiting space for restricting the motor shaft.

[0012] Specifically, the positioning recess has a connecting screw hole, and the positioning protrusion has a connecting through hole at the corresponding position of the connecting screw hole. A connecting screw passes through the connecting through hole from top to bottom and connects to the connecting screw hole; so as to make the connection between the positioning protrusion and the positioning recess stable, which is beneficial to the stability of the limiting space formed by the positioning protrusion and the positioning recess.

[0013] Specifically, there are two positioning recesses and two positioning protrusions. The two positioning recesses are located on both sides of the lower limit recess, and the two positioning protrusions are located on both sides of the upper limit recess; the implementation effect is good.

[0014] Specifically, the upper shell is provided with an inner groove, and the bottom surface of the inner groove has a connecting through hole that passes through the upper limit seat; this facilitates the connection operation of the connecting screw on the upper limit seat and the lower limit seat, while the inner groove also serves to hide the connecting screw.

[0015] Specifically, the reduction transmission assembly includes a transmission turbine and a planetary reduction assembly. The motor and the transmission turbine are both placed on the first groove, and the transmission turbine is located on one side of the motor shaft. A worm section is provided on the motor shaft, and the worm section meshes with the transmission turbine. The planetary reduction assembly is placed on the transmission turbine and is connected to the transmission turbine in a transmission manner. The output shaft is connected to the planetary reduction assembly. This transmission method has a good transmission effect, and the overall size of the gearbox is small. Furthermore, the installation of the motor and the transmission turbine on the first groove is relatively simple and convenient.

[0016] The beneficial effects of this utility model are as follows: (1) The motor shaft limiting structure of this gearbox, by adding a limiting component, the limiting space on the limiting component plays a limiting role on the motor shaft, which can effectively limit the swing of the motor shaft, ensure stable meshing transmission between the motor shaft and the reduction transmission component, and help improve the service life of the product and reduce noise.

[0017] (2) The structure of the limiting frame and the limiting hole is simple, and the limiting hole can also effectively limit the motor shaft, thus achieving the purpose of this patent.

[0018] (3) The limiting space formed by the upper limit seat and the lower limit seat can also effectively limit the motor shaft, that is, it can effectively achieve the purpose of this patent. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the motor shaft limiting structure of the gearbox of this utility model.

[0020] Figure 2 This is a schematic diagram of the gearbox of this utility model after the upper shell has been removed.

[0021] Figure 3 This is a disassembled view of the motor shaft limiting structure of the gearbox of this utility model.

[0022] Figure 4 This is a three-dimensional enlarged view of the limiting component of this utility model.

[0023] Figure 5 This is a cross-sectional view of the motor shaft limiting structure of the gearbox of this utility model.

[0024] Figure 6 This is a schematic diagram of Embodiment 2 of the motor shaft limiting structure of the gearbox of this utility model.

[0025] Figure 7 This is a schematic diagram of Embodiment 2 of the present invention after the upper shell has been removed.

[0026] Figure 8 This is a three-dimensional enlarged view of the upper shell of Embodiment 2 of this utility model.

[0027] Figure 9 This is a cross-sectional view of Embodiment 2 of the motor shaft limiting structure of the gearbox of this utility model. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments: Example 1, combined with Figures 1 to 5 As shown, a motor shaft limiting structure for a gearbox includes a housing 1, a motor 2, a reduction transmission assembly 3, and an output shaft 4. The housing 1 has a mounting space 16, on which the motor 2 and the reduction transmission assembly 3 are placed. The motor shaft 21 of the motor 2 meshes with the reduction transmission assembly 3, and the output shaft 4 is connected to the reduction transmission assembly 3 with one end extending out of the housing 1. The structure is characterized by further including a limiting member 5, which has a limiting space 51. The limiting member 5 is connected to the housing 1, and one end of the motor shaft 21 extends into the limiting space 51.

[0029] As a specific solution, the limiting member 5 is a limiting frame, one end of the outer shell 1 is provided with an opening 11, the limiting frame is connected to the opening 11, the limiting frame is provided with a limiting hole, the limiting hole constitutes the limiting space 51, and one end of the motor shaft 21 extends into the limiting hole.

[0030] In this embodiment, the limiting frame is cross-shaped, with the limiting hole at the center of the limiting frame and the four ends of the limiting frame having locking holes 52. The outer shell 1 located on the outer periphery of the opening 11 has four protruding buckles 12 corresponding to the four locking holes 52, and the protruding buckles 12 engage with the locking holes 52.

[0031] In this embodiment, four recesses 13 are provided on the outer shell 1 located on the outer periphery of the opening 11, corresponding to the four protruding buckles 12, and the protruding buckles 12 are located on one side of the recesses 13. The four ends of the limiting frame extend into the corresponding recesses 13 respectively.

[0032] In this embodiment, the outer shell 1 includes a base 14 and an upper shell 15 connected to each other. A first groove 141 is provided on the base 14, and a second groove 151 is provided on the upper shell 15. The first groove 141 and the second groove 151 form the placement space 16. The motor 2 and the speed reduction transmission assembly 3 are both placed on the first groove 141 of the base 14.

[0033] Example 2, combined with Figures 6 to 9 As shown, this embodiment is similar to Embodiment 1, except that the limiting member 5 includes an upper limit seat 53 and a lower limit seat 54, and the outer shell 1 includes a base 14 and an upper shell 15 connected to each other. The base 14 is provided with a first groove 141, and the upper shell 15 is provided with a second groove 151. The first groove 141 and the second groove 151 form the placement space 16. The lower limit seat 54 is placed in the first groove 141, and the upper limit seat 53 is placed in the second groove 151. The upper limit seat 53 has an upper limit recess 531, and the lower limit seat 54 has a lower limit recess 541. The lower limit recess 541 and the upper limit recess 531 form the limiting space 51.

[0034] In this embodiment, the lower limit seat 54 is also provided with a positioning recess 542, and the upper limit seat 53 is provided with a positioning protrusion 532 corresponding to the positioning recess 542, the positioning protrusion 532 extending into the positioning recess 542.

[0035] In this embodiment, the positioning recess 542 has a connecting screw hole 543, and the positioning protrusion 532 has a connecting through hole 533 corresponding to the position of the connecting screw hole 543. A connecting screw passes through the connecting through hole 533 from top to bottom and connects to the connecting screw hole 543.

[0036] In this embodiment, the upper shell 15 is provided with an inner groove 152, and the bottom surface of the inner groove 152 has a connecting through hole 533 that passes through the upper limit seat 53.

[0037] As a preferred embodiment, there are two positioning recesses 542 and two positioning protrusions 532. The two positioning recesses 542 are located on both sides of the lower limit recess 541, and the two positioning protrusions 532 are located on both sides of the upper limit recess 531.

[0038] As a more specific embodiment, the speed reduction transmission assembly 3 includes a transmission turbine 31 and a planetary speed reduction assembly 32. The motor 2 and the transmission turbine 31 are both placed on the first groove 141, and the transmission turbine 31 is located on one side of the motor shaft 21 of the motor 2. A worm section 211 is provided on the motor shaft 21, and the worm section 211 meshes with the transmission turbine 31. The planetary speed reduction assembly 32 is placed on the transmission turbine 31 and is connected to the transmission turbine 31 in a driving manner. The output shaft 4 is connected to the planetary speed reduction assembly 32. More specifically, a pinion is provided at the center of the transmission turbine 31, and the pinion is connected to the planetary speed reduction assembly 32 in a driving manner.

Claims

1. A motor shaft limiting structure for a gearbox, comprising a housing (1), a motor (2), a reduction gear assembly (3), and an output shaft (4), wherein a mounting space (16) is provided inside the housing (1), the motor (2) and the reduction gear assembly (3) are both placed in the mounting space (16), the motor shaft (21) of the motor (2) meshes with the reduction gear assembly (3), the output shaft (4) is connected to the reduction gear assembly (3), and one end of the output shaft (4) extends out of the housing (1), characterized in that, It also includes a limiting member (5), which has a limiting space (51) on it. The limiting member (5) is connected to the housing (1) and one end of the motor shaft (21) extends into the limiting space (51).

2. The motor shaft limiting structure of the gearbox according to claim 1, characterized in that, The limiting component (5) is a limiting frame. One end of the outer shell (1) is provided with an opening (11). The limiting frame is connected to the opening (11). The limiting frame is provided with a limiting hole. The limiting hole constitutes the limiting space (51). One end of the motor shaft (21) extends into the limiting hole.

3. The motor shaft limiting structure of the gearbox according to claim 2, characterized in that, The limiting frame is cross-shaped, with the limiting hole at the center and the four ends of the limiting frame having locking holes (52). The outer shell (1) located on the outer periphery of the opening (11) has four protrusions (12) corresponding to the four locking holes (52), and the protrusions (12) engage with the locking holes (52).

4. The motor shaft limiting structure of the gearbox according to claim 3, characterized in that, Four recesses (13) are provided on the outer shell (1) located on the periphery of the opening (11) corresponding to the four protrusions (12), and the protrusions (12) are located on one side of the recesses (13), and the four ends of the limiting frame extend into the corresponding recesses (13).

5. The motor shaft limiting structure of the gearbox according to claim 1, characterized in that, The limiting member (5) includes an upper limit seat (53) and a lower limit seat (54). The outer shell (1) includes a base (14) and an upper shell (15) connected to each other. A first groove (141) is provided on the base (14), and a second groove (151) is provided on the upper shell (15). The first groove (141) and the second groove (151) form the placement space (16). The lower limit seat (54) is placed in the first groove (141), and the upper limit seat (53) is placed in the second groove (151). An upper limit recess (531) is opened on the upper limit seat (53), and a lower limit recess (541) is opened on the lower limit seat (54). The lower limit recess (541) and the upper limit recess (531) form the limiting space (51).

6. The motor shaft limiting structure of the gearbox according to claim 5, characterized in that, The lower limit seat (54) is also provided with a positioning recess (542), and the upper limit seat (53) is provided with a positioning protrusion (532) corresponding to the positioning recess (542), and the positioning protrusion (532) extends into the positioning recess (542).

7. The motor shaft limiting structure of the gearbox according to claim 6, characterized in that, The positioning recess (542) has a connecting screw hole (543), and the positioning protrusion (532) has a connecting through hole (533) corresponding to the position of the connecting screw hole (543). A connecting screw passes through the connecting through hole (533) from top to bottom and connects to the connecting screw hole (543).

8. The motor shaft limiting structure of the gearbox according to claim 7, characterized in that, positioning There are two recesses (542) and two positioning protrusions (532). The two positioning recesses (542) are located on both sides of the lower limit recess (541), and the two positioning protrusions (532) are located on both sides of the upper limit recess (531).

9. The motor shaft limiting structure of the gearbox according to claim 7, characterized in that, The upper shell (15) is provided with an inner groove (152), and the bottom surface of the inner groove (152) has a connecting through hole (533) that passes through the upper limit seat (53).

10. The motor shaft limiting structure of the gearbox according to claim 5, characterized in that, The speed reduction transmission assembly (3) includes a transmission turbine (31) and a planetary speed reduction assembly (32). The motor (2) and the transmission turbine (31) are both placed on the first groove (141), and the transmission turbine (31) is located on one side of the motor shaft (21) of the motor (2). A worm section (211) is provided on the motor shaft (21), and the worm section (211) meshes with the transmission turbine (31). The planetary speed reduction assembly (32) is placed on the transmission turbine (31) and is connected to the transmission turbine (31) in a transmission connection. The output shaft (4) is connected to the planetary speed reduction assembly (32).

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