Gearbox

Abstract

The gearbox comprises a shell, a motor, a speed reduction transmission assembly and an output shaft, a containing space is arranged in the shell, the motor and the speed reduction transmission assembly are both arranged in the containing space, the output shaft is connected with the speed reduction transmission assembly, one end of the output shaft extends out of the shell, and a motor shaft of the motor is in transmission connection with the speed reduction transmission assembly. The motor is characterized in that a blocking part is further arranged on the placement space, the blocking part is located on one side of the motor shaft, and a gap exists between the side wall of the blocking part and the periphery of the motor shaft; according to the gearbox, by additionally arranging the blocking part, when the motor shaft is deformed by a certain amplitude due to stress in the transmission process, the blocking part can abut against the motor shaft to prevent the motor shaft from continuously deforming, namely, the motor shaft is prevented from being greatly deformed, and transmission stability between the motor shaft and the speed reduction transmission assembly is facilitated; meanwhile, the motor shaft and the speed reduction transmission assembly are not prone to being damaged, and the service life of the motor shaft and the speed reduction transmission assembly is guaranteed.

Description

Technical Field

[0001] This utility model specifically relates to 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 worm wheel, the interaction force between the two causes the motor shaft and the first-stage worm on it to swing and deform in the opposite direction of the first-stage worm wheel. After long-term use, the motor shaft and the first-stage worm on it will deform significantly, affecting the transmission effect of the first-stage worm and the first-stage worm wheel. At the same time, this long-term abnormal meshing transmission will damage the first-stage worm and the first-stage worm wheel, reducing the service life of the product. Utility Model Content

[0005] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a gearbox with an added blocking part to prevent large deformation of the motor shaft and ensure stable transmission.

[0006] The purpose of this utility model is achieved as follows:

[0007] 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 output shaft is connected to the reduction gear assembly, with one end extending out of the housing. The motor shaft is drively connected to the reduction gear assembly. The gearbox is characterized by a blocking portion located on one side of the motor shaft, with a gap between the sidewall of the blocking portion and the outer periphery of the motor shaft. By adding the blocking portion, when the motor shaft deforms to a certain extent under stress during transmission, the blocking portion can abut against the motor shaft, preventing further deformation. This prevents significant deformation of the motor shaft, which is beneficial for stable transmission between the motor shaft and the reduction gear assembly. It also makes the motor shaft and reduction gear assembly less prone to damage, ensuring their service life. Furthermore, the gap provides a certain deformation space for the motor shaft, ensuring that the blocking portion does not affect the rotation of the motor shaft within a certain time range.

[0008] The objective of this utility model can also be achieved by the following technical measures:

[0009] Specifically, the blocking part is narrower at the top and wider at the bottom, and there is a gap between the upper sidewall of the blocking part and the outer periphery of the motor shaft. The blocking part with a narrower top and wider bottom can effectively achieve the purpose of this patent, namely: to prevent the motor shaft from deforming significantly. At the same time, the upper part of the blocking part is narrower so that when the blocking part abuts against the motor shaft, the blocking part has less impact on the rotation of the motor shaft, so that the motor shaft can work stably.

[0010] Specifically, the blocking part is a blocking thin plate. The rear side of the blocking thin plate is connected to the inner wall of the placement space. The left, right and front sides of the blocking thin plate are all inclined inward from bottom to top, so that the blocking thin plate is narrow at the top and wide at the bottom. There is a gap between the upper front part of the blocking thin plate and the outer periphery of the motor shaft, so that when the blocking part abuts against the motor shaft, the contact area between the blocking part and the motor shaft is small.

[0011] Specifically, the height H of the blocking plate is 36-40mm, the upper end thickness L1 of the blocking plate is 3-4mm, the lower end thickness L2 of the blocking plate is 4.3-5.3mm, and the diameter Φ of the motor shaft is 5-6mm. The above values ​​are reasonably set, which optimizes the fit between the blocking plate and the motor shaft and can well achieve the purpose of this patent.

[0012] Furthermore, the rear side of the barrier plate is integrally formed with the inner wall of the placement space to make the installation of the barrier plate simple and convenient.

[0013] Specifically, the speed reduction transmission assembly includes a transmission component and a planetary speed reduction assembly. The transmission component is located on one side of the motor shaft and includes a lower worm gear and an upper gear. A worm sleeve is provided on the motor shaft, and the worm sleeve meshes with the lower end of the lower worm gear. The planetary speed reduction assembly is located on the other side of the motor shaft and meshes with the upper gear. The output shaft is connected to the planetary speed reduction assembly. The transmission component drives the motor shaft and the planetary speed reduction assembly respectively, so that the motor shaft drives the planetary speed reduction assembly to rotate through the transmission component. This arrangement allows for diverse positioning of the motor shaft and the planetary speed reduction assembly.

[0014] Specifically, the outer casing includes a connected base and an upper shell. The base has a first groove, and the upper shell has a second groove. The first groove and the second groove form the mounting space. The motor and transmission component are placed on the first groove. A support seat is provided on the first groove, and the side wall of the support seat has the blocking part. The bottom of the planetary reduction assembly is placed on the support seat. A limiting space is provided on the second groove corresponding to the position of the planetary reduction assembly. The output axis extends upward out of the limiting groove. The outer casing has a simple structure and is easy to implement, facilitating the independent installation of components such as the motor, transmission component, planetary reduction assembly, and blocking part within the outer casing, as well as the cooperation between the components.

[0015] The beneficial effects of this utility model are as follows:

[0016] This gearbox, by adding a blocking part, can stop the motor shaft when it deforms to a certain extent due to force during transmission, preventing further deformation. In other words, it prevents the motor shaft from deforming significantly, which is beneficial to the transmission stability between the motor shaft and the reduction gear assembly. It also makes the motor shaft and reduction gear assembly less prone to damage, ensuring their service life. Furthermore, the clearance provides a certain amount of deformation space for the motor shaft, so that the blocking part does not affect the rotation of the motor shaft within a certain range.

[0017] The top-narrow and bottom-wide blocking part can effectively achieve the purpose of this patent, namely: to prevent the motor shaft from deforming significantly. At the same time, the upper part of the blocking part is narrower so that when the blocking part abuts against the motor shaft, the blocking part has less impact on the rotation of the motor shaft, thus enabling the motor shaft to work stably.

[0018] The housing has a simple structure and is easy to implement, which facilitates the independent installation of components such as motors, transmission components, planetary reduction gears and blocking parts within the housing, as well as the coordination between the components. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of a gearbox according to the present invention.

[0020] Figure 2 for Figure 1Enlarged view of point A.

[0021] Figure 3 This is a disassembled view of a gearbox according to the present invention.

[0022] Figure 4 for Figure 3 Enlarged view of point B.

[0023] Figure 5 This is another sectional view of a gearbox according to the present invention. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0025] Implementation examples, in conjunction with Figures 1 to 5 As shown, a gearbox includes a housing 1, a motor 2, a reduction gear assembly 3, and an output shaft 4. The housing 1 has a mounting space 11. The motor 2 and the reduction gear assembly 3 are both placed in the mounting space 11. 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. The motor shaft 21 of the motor 2 is connected to the reduction gear assembly 3. The gearbox is characterized in that a blocking part 5 is also provided in the mounting space 11. The blocking part 5 is located on one side of the motor shaft 21 and there is a gap 100 between the side wall of the blocking part 5 and the outer periphery of the motor shaft 21.

[0026] As a specific embodiment, the blocking part 5 is narrow at the top and wide at the bottom, and the gap 100 exists between the upper sidewall of the blocking part 5 and the outer periphery of the motor shaft 21.

[0027] In this embodiment, the blocking part 5 is a blocking thin plate. The rear side 51 of the blocking thin plate is connected to the inner wall of the placement space 11. The left side 52, right side 53 and front side 54 of the blocking thin plate are all inclined inward from bottom to top. There is a gap 100 between the upper part of the front side 54 of the blocking thin plate and the outer periphery of the motor shaft 21.

[0028] As a more specific embodiment, the height H of the blocking plate is 36-40mm, the upper end thickness L1 of the blocking plate is 3-4mm, the lower end thickness L2 of the blocking plate is 4.3-5.3mm, and the diameter Φ of the motor shaft 21 is 5-6mm; more specifically, the height H of the blocking plate is 36.6mm, the upper end thickness L1 of the blocking plate is 3mm, the lower end thickness L2 of the blocking plate is 4.3mm, and the diameter Φ of the motor shaft 21 is 5.4mm.

[0029] As a more specific embodiment, the rear side 51 of the blocking plate is integrally formed with the inner wall of the placement space 11.

[0030] In a preferred embodiment, the speed reduction transmission assembly 3 includes a transmission component 31 and a planetary speed reduction assembly 32. The transmission component 31 is located on one side of the motor shaft 21 of the motor 2, and the transmission component 31 includes a lower worm gear portion 311 and an upper gear portion 312. A worm sleeve 211 is provided on the motor shaft 21, and the worm sleeve 211 meshes with the lower end of the lower worm gear portion 311. The planetary speed reduction assembly 32 is located on the other side of the motor shaft 21 and meshes with the upper gear portion 312. The output shaft 4 is connected to the planetary speed reduction assembly 32.

[0031] In this embodiment, the outer shell 1 includes a base 12 and an upper shell 13 connected to each other. The base 12 is provided with a first groove 121, and the upper shell 13 is provided with a second groove 131. The first groove 121 and the second groove 131 form the placement space 11. The motor 2 and the transmission component 31 are placed on the first groove 121. A support seat 123 is provided on the first groove 121. The side wall of the support seat 123 is provided with the blocking part 5. The bottom of the planetary reduction assembly 32 is placed on the support seat 123. A limiting space 200 is provided on the second groove 131 corresponding to the position of the planetary reduction assembly 32. The output shaft 4 extends upward beyond the limiting space 200.

Claims

1. A gearbox, comprising a housing (1), a motor (2), a reduction gear assembly (3), and an output shaft (4), wherein the housing (1) has a mounting space (11), the motor (2) and the reduction gear assembly (3) are both mounted on the mounting space (11), 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), and the motor shaft (21) of the motor (2) is drively connected to the reduction gear assembly (3), characterized in that, The placement space (11) is also provided with a blocking part (5), which is located on one side of the motor shaft (21) and there is a gap (100) between the side wall of the blocking part (5) and the outer periphery of the motor shaft (21).

2. The gearbox according to claim 1, characterized in that, The blocking part (5) is narrow at the top and wide at the bottom, and there is a gap (100) between the upper side wall of the blocking part (5) and the outer periphery of the motor shaft (21).

3. A gearbox according to claim 2, characterized in that, The blocking part (5) is a blocking thin plate. The rear side (51) of the blocking thin plate is connected to the inner wall of the placement space (11). The left side (52), right side (53) and front side (54) of the blocking thin plate are all inclined inward from bottom to top. There is a gap (100) between the upper part of the front side (54) of the blocking thin plate and the outer periphery of the motor shaft (21).

4. A gearbox according to claim 3, characterized in that, The height H of the blocking plate is 36-40mm, the upper end thickness L1 of the blocking plate is 3-4mm, the lower end thickness L2 of the blocking plate is 4.3-5.3mm, and the diameter Φ of the motor shaft (21) is 5-6mm.

5. A gearbox according to claim 3, characterized in that, The rear side (51) of the barrier plate is integrally formed with the inner wall of the placement space (11).

6. A gearbox according to claim 1, characterized in that, The speed reduction transmission assembly (3) includes a transmission component (31) and a planetary speed reduction assembly (32). The transmission component (31) is located on one side of the motor shaft (21) of the motor (2), and the transmission component (31) includes a lower worm gear part (311) and an upper gear part (312). A worm sleeve (211) is provided on the motor shaft (21), and the worm sleeve (211) meshes with the lower end of the lower worm gear part (311). The planetary speed reduction assembly (32) is located on the other side of the motor shaft (21), and the planetary speed reduction assembly (32) meshes with the upper gear part (312). The output shaft (4) is connected to the planetary speed reduction assembly (32).

7. A gearbox according to claim 6, characterized in that, The outer casing (1) includes a base (12) and an upper shell (13) connected to each other. A first groove (121) is provided on the base (12), and a second groove (131) is provided on the upper shell (13). The first groove (121) and the second groove (131) form the placement space (11). The motor (2) and the transmission component (31) are placed on the first groove (121). A support seat (123) is provided on the first groove (121). The side wall of the support seat (123) is provided with the blocking part (5). The bottom of the planetary reduction assembly (32) is placed on the support seat (123). A limiting space (200) is provided on the second groove (131) corresponding to the position of the planetary reduction assembly (32). The output shaft (4) extends upward beyond the limiting space (200).

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